Lupus & Connective Tissue Diseases

TOPLINE:

Combined pediatric dermatology-rheumatology clinics can improve patient care and patient satisfaction, a survey of dermatologists suggested.

METHODOLOGY:

• Combined pediatric dermatology-rheumatology clinics can improve patient outcomes and experiences, particularly for pediatric autoimmune conditions presenting with both cutaneous and systemic manifestations.
• The researchers surveyed 208 pediatric dermatologists working in combined pediatric dermatology-rheumatology clinics.
• A total of 13 member responses were recorded from three countries: 10 from the United States, two from Mexico, and one from Canada.

TAKEAWAY:

• Perceived benefits of combined clinics were improved patient care through coordinated treatment decisions and timely communication between providers.
• Patient satisfaction was favorable, and patients and families endorsed the combined clinic approach.
• Barriers to clinic establishment included differences in the pace between dermatology and rheumatology clinic flow, the need to generate more relative value units, resistance from colleagues, and limited time.
• Areas that needed improvement included more time for patient visits, dedicated research assistants, new patient referrals, additional patient rooms, resources for research, and patient care infrastructure.

IN PRACTICE:

The insights from this survey “will hopefully inspire further development of these combined clinics,” the authors wrote.

SOURCE:

The investigation, led by Olga S. Cherepakhin, BS, University of Washington, Seattle, Washington, was published in Pediatric Dermatology.

LIMITATIONS:

Limitations included the subjective nature, lack of some information, selection bias, and small number of respondents, and the survey reflected the perspective of the pediatric dermatologists only.

DISCLOSURES:

The study was supported by the National Center for Advancing Translational Sciences of the National Institutes of Health. One author reported full-time employment at Janssen R&D, and the other authors had no disclosures.

A version of this article appeared on Medscape.com.

TOPLINE:

Combined pediatric dermatology-rheumatology clinics can improve patient care and patient satisfaction, a survey of dermatologists suggested.

METHODOLOGY:

• Combined pediatric dermatology-rheumatology clinics can improve patient outcomes and experiences, particularly for pediatric autoimmune conditions presenting with both cutaneous and systemic manifestations.
• The researchers surveyed 208 pediatric dermatologists working in combined pediatric dermatology-rheumatology clinics.
• A total of 13 member responses were recorded from three countries: 10 from the United States, two from Mexico, and one from Canada.

TAKEAWAY:

• Perceived benefits of combined clinics were improved patient care through coordinated treatment decisions and timely communication between providers.
• Patient satisfaction was favorable, and patients and families endorsed the combined clinic approach.
• Barriers to clinic establishment included differences in the pace between dermatology and rheumatology clinic flow, the need to generate more relative value units, resistance from colleagues, and limited time.
• Areas that needed improvement included more time for patient visits, dedicated research assistants, new patient referrals, additional patient rooms, resources for research, and patient care infrastructure.

IN PRACTICE:

The insights from this survey “will hopefully inspire further development of these combined clinics,” the authors wrote.

SOURCE:

The investigation, led by Olga S. Cherepakhin, BS, University of Washington, Seattle, Washington, was published in Pediatric Dermatology.

LIMITATIONS:

Limitations included the subjective nature, lack of some information, selection bias, and small number of respondents, and the survey reflected the perspective of the pediatric dermatologists only.

DISCLOSURES:

The study was supported by the National Center for Advancing Translational Sciences of the National Institutes of Health. One author reported full-time employment at Janssen R&D, and the other authors had no disclosures.

A version of this article appeared on Medscape.com.

TOPLINE:

Combined pediatric dermatology-rheumatology clinics can improve patient care and patient satisfaction, a survey of dermatologists suggested.

METHODOLOGY:

• Combined pediatric dermatology-rheumatology clinics can improve patient outcomes and experiences, particularly for pediatric autoimmune conditions presenting with both cutaneous and systemic manifestations.
• The researchers surveyed 208 pediatric dermatologists working in combined pediatric dermatology-rheumatology clinics.
• A total of 13 member responses were recorded from three countries: 10 from the United States, two from Mexico, and one from Canada.

TAKEAWAY:

• Perceived benefits of combined clinics were improved patient care through coordinated treatment decisions and timely communication between providers.
• Patient satisfaction was favorable, and patients and families endorsed the combined clinic approach.
• Barriers to clinic establishment included differences in the pace between dermatology and rheumatology clinic flow, the need to generate more relative value units, resistance from colleagues, and limited time.
• Areas that needed improvement included more time for patient visits, dedicated research assistants, new patient referrals, additional patient rooms, resources for research, and patient care infrastructure.

IN PRACTICE:

The insights from this survey “will hopefully inspire further development of these combined clinics,” the authors wrote.

SOURCE:

The investigation, led by Olga S. Cherepakhin, BS, University of Washington, Seattle, Washington, was published in Pediatric Dermatology.

LIMITATIONS:

Limitations included the subjective nature, lack of some information, selection bias, and small number of respondents, and the survey reflected the perspective of the pediatric dermatologists only.

DISCLOSURES:

The study was supported by the National Center for Advancing Translational Sciences of the National Institutes of Health. One author reported full-time employment at Janssen R&D, and the other authors had no disclosures.

A version of this article appeared on Medscape.com.

TOPLINE:

Tocilizumab administration results in high remission rates in adult-onset Still’s disease (AOSD), but the recurrence rate increases on tocilizumab discontinuation, with a longer tocilizumab interval and lower prednisolone dose being critical for successful tocilizumab withdrawal.

METHODOLOGY:

• Tocilizumab is effective in reducing systemic inflammation and lowering glucocorticoid doses in patients with AOSD; however, the possibility of tocilizumab withdrawal has not been explored.
• This retrospective study assessed whether tocilizumab can be discontinued after achieving remission in 48 patients with AOSD.
• The systemic feature score, Pouchot score, and modified Pouchot score were used to evaluate the disease activity.
• Remission was characterized by the absence of symptoms related to Still’s disease, normal levels of erythrocyte sedimentation rate and C-reactive protein, and absence of treatment intensification requirement.
• Recurrence after tocilizumab discontinuation was defined as a disease flare with AOSD treatment intensification that necessitated either a ≥ 1.5-fold increase in glucocorticoid dosage and/or the initiation of a biologic agent.

TAKEAWAY:

• Over a median observation period of 5.1 years, 38 (79.2%) patients achieved remission at 6 months, of which 13 discontinued tocilizumab and the remaining 25 continued it.
• Among patients who discontinued tocilizumab on achieving remission, recurrence was noted in 50% within a year, typically after a mean period of 5.5 months after discontinuation.
• Patients in remission with longer tocilizumab intervals (> 14 days; P < .0002) or lower prednisolone doses (< 7 mg/d; P = .001) at the time of tocilizumab discontinuation showed better recurrence-free rates than those without.
• The duration of tocilizumab use, systemic feature score, and serum ferritin levels at tocilizumab discontinuation were not significantly different between patients who experienced recurrence and those who did not.

IN PRACTICE:

“Stable conditions with extended intervals of tocilizumab administration and very low doses of concomitant glucocorticoids are essential for successful discontinuation,” the authors wrote.

SOURCE:

The study was led by Hiroya Tamai, Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan, and published online in Rheumatology (Oxford).

LIMITATIONS:

The study was limited by its retrospective study design and a small sample size. Moreover, there could have been a selection bias as the attending physicians could use their discretion to initiate or stop tocilizumab treatment. The absence of a universally agreed-upon definition for remission or recurrence in AOSD made comparing the findings of this study with those of others challenging.

DISCLOSURES:

This study did not receive any specific funding from any bodies in public, commercial, or nonprofit sectors. Some of the authors reported receiving honoraria and research support from various pharmaceutical companies.
 

A version of this article appeared on Medscape.com.

TOPLINE:

Tocilizumab administration results in high remission rates in adult-onset Still’s disease (AOSD), but the recurrence rate increases on tocilizumab discontinuation, with a longer tocilizumab interval and lower prednisolone dose being critical for successful tocilizumab withdrawal.

METHODOLOGY:

• Tocilizumab is effective in reducing systemic inflammation and lowering glucocorticoid doses in patients with AOSD; however, the possibility of tocilizumab withdrawal has not been explored.
• This retrospective study assessed whether tocilizumab can be discontinued after achieving remission in 48 patients with AOSD.
• The systemic feature score, Pouchot score, and modified Pouchot score were used to evaluate the disease activity.
• Remission was characterized by the absence of symptoms related to Still’s disease, normal levels of erythrocyte sedimentation rate and C-reactive protein, and absence of treatment intensification requirement.
• Recurrence after tocilizumab discontinuation was defined as a disease flare with AOSD treatment intensification that necessitated either a ≥ 1.5-fold increase in glucocorticoid dosage and/or the initiation of a biologic agent.

TAKEAWAY:

• Over a median observation period of 5.1 years, 38 (79.2%) patients achieved remission at 6 months, of which 13 discontinued tocilizumab and the remaining 25 continued it.
• Among patients who discontinued tocilizumab on achieving remission, recurrence was noted in 50% within a year, typically after a mean period of 5.5 months after discontinuation.
• Patients in remission with longer tocilizumab intervals (> 14 days; P < .0002) or lower prednisolone doses (< 7 mg/d; P = .001) at the time of tocilizumab discontinuation showed better recurrence-free rates than those without.
• The duration of tocilizumab use, systemic feature score, and serum ferritin levels at tocilizumab discontinuation were not significantly different between patients who experienced recurrence and those who did not.

IN PRACTICE:

“Stable conditions with extended intervals of tocilizumab administration and very low doses of concomitant glucocorticoids are essential for successful discontinuation,” the authors wrote.

SOURCE:

The study was led by Hiroya Tamai, Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan, and published online in Rheumatology (Oxford).

LIMITATIONS:

The study was limited by its retrospective study design and a small sample size. Moreover, there could have been a selection bias as the attending physicians could use their discretion to initiate or stop tocilizumab treatment. The absence of a universally agreed-upon definition for remission or recurrence in AOSD made comparing the findings of this study with those of others challenging.

DISCLOSURES:

This study did not receive any specific funding from any bodies in public, commercial, or nonprofit sectors. Some of the authors reported receiving honoraria and research support from various pharmaceutical companies.
 

A version of this article appeared on Medscape.com.

TOPLINE:

Tocilizumab administration results in high remission rates in adult-onset Still’s disease (AOSD), but the recurrence rate increases on tocilizumab discontinuation, with a longer tocilizumab interval and lower prednisolone dose being critical for successful tocilizumab withdrawal.

METHODOLOGY:

• Tocilizumab is effective in reducing systemic inflammation and lowering glucocorticoid doses in patients with AOSD; however, the possibility of tocilizumab withdrawal has not been explored.
• This retrospective study assessed whether tocilizumab can be discontinued after achieving remission in 48 patients with AOSD.
• The systemic feature score, Pouchot score, and modified Pouchot score were used to evaluate the disease activity.
• Remission was characterized by the absence of symptoms related to Still’s disease, normal levels of erythrocyte sedimentation rate and C-reactive protein, and absence of treatment intensification requirement.
• Recurrence after tocilizumab discontinuation was defined as a disease flare with AOSD treatment intensification that necessitated either a ≥ 1.5-fold increase in glucocorticoid dosage and/or the initiation of a biologic agent.

TAKEAWAY:

• Over a median observation period of 5.1 years, 38 (79.2%) patients achieved remission at 6 months, of which 13 discontinued tocilizumab and the remaining 25 continued it.
• Among patients who discontinued tocilizumab on achieving remission, recurrence was noted in 50% within a year, typically after a mean period of 5.5 months after discontinuation.
• Patients in remission with longer tocilizumab intervals (> 14 days; P < .0002) or lower prednisolone doses (< 7 mg/d; P = .001) at the time of tocilizumab discontinuation showed better recurrence-free rates than those without.
• The duration of tocilizumab use, systemic feature score, and serum ferritin levels at tocilizumab discontinuation were not significantly different between patients who experienced recurrence and those who did not.

IN PRACTICE:

“Stable conditions with extended intervals of tocilizumab administration and very low doses of concomitant glucocorticoids are essential for successful discontinuation,” the authors wrote.

SOURCE:

The study was led by Hiroya Tamai, Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan, and published online in Rheumatology (Oxford).

LIMITATIONS:

The study was limited by its retrospective study design and a small sample size. Moreover, there could have been a selection bias as the attending physicians could use their discretion to initiate or stop tocilizumab treatment. The absence of a universally agreed-upon definition for remission or recurrence in AOSD made comparing the findings of this study with those of others challenging.

DISCLOSURES:

This study did not receive any specific funding from any bodies in public, commercial, or nonprofit sectors. Some of the authors reported receiving honoraria and research support from various pharmaceutical companies.
 

A version of this article appeared on Medscape.com.

Some of the best clinical trials of patients with antineutrophil cytoplasmic antibody–associated vasculitis (AAV) that were presented at the 21st International Vasculitis Workshop in Barcelona, Spain, included studies addressing relapse after stopping steroids, preventing relapse with abatacept, improving kidney function with plasma exchange, and vaccinating rituximab-treated patients.
 

Stopping Steroids After Remission in GPA

In the randomized, open-label TAPIR (The Assessment of Prednisone In Remission Trial) study of 159 adults with GPA in remission who had tapered to a prednisone dose of 5 mg/day, those who remained at that dosage had a significantly lower rate of relapse after 6 months than those who tapered to 0 mg/day (4.2% vs 15.5%; P = .227), according to results reported at the meeting.

However, use of a higher dose of prednisone for disease relapse by 6 months was similar for patients who used rituximab at baseline (8.8% with 0 mg/day vs 6.1% with 5 mg/day; P = .667), and the difference in this primary outcome was more pronounced among patients who did not take rituximab at baseline (20.0% with 0 mg/day vs 2.6% with 5 mg/day; P = .023).

A higher percentage of patients taking prednisone 0 mg/day had disease relapses that were considered minor (14.1% and 4.2%; P = .0391). Major relapses occurred in none of the patients taking 5 mg/day and in 1.4% receiving 0 mg/day. About 90% of patients in either treatment arm completed the trial.

The study, funded by the National Institute of Arthritis and Musculoskelatal and Skin Diseases and the National Heart Lung and Blood Institute, was unique in that half of patients randomized in the study were enrolled at community clinics and half were enrolled at Vasculitis Clinical Research Consortium clinical centers.
 

Abatacept Falls Short for Preventing Relapse in GPA

Adding abatacept to glucocorticoids failed to reduce risk of relapse, worsening disease, or failure to reach remission in adults with relapsing, nonsevere GPA, based on data from a randomized trial of 65 individuals.

In the 20-site, randomized, double-blind ABROGATE (Abatacept for the Treatment of Relapsing, Non-Severe, Granulomatosis With Polyangiitis) study, 34 patients received 125 mg subcutaneous abatacept once a week or a placebo in addition to 30 mg/day of prednisone that was tapered and discontinued after 12 weeks. Patients who were receiving methotrexate, azathioprine, mycophenolate, or leflunomide at baseline continued the medication at a stable dose.

The primary outcome of disease worsening or relapse occurred in 62% of the abatacept group and 68% of the placebo group, and no significant difference in treatment failure rate appeared between the groups. In addition, key secondary endpoints of time to full remission, duration of glucocorticoid-free remission, relapse severity, prevention of damage, and patient-reported quality of life outcomes were not significantly different between the groups.

A total of 112 adverse events occurred, with similar type and severity between the groups, including incidence of infections.

The findings were limited by the relatively small sample size, but the results suggest a need for further research to determine mechanisms of disease and explore additional novel treatments for this rare patient population, the researchers wrote in their abstract.

The study was funded by the National Institutes of Health and Bristol-Myers Squibb.
 

Plasma Exchange Improves Kidney Function in AAV

Use of therapeutic plasma exchange (PLEX) as an adjunct treatment improved early kidney function in adults with AAV and glomerulonephritis but did not extend beyond 8 weeks, and recovery of kidney function was no different between patients receiving a regular glucocorticoid regimen versus a reduced course, based on a post-hoc analysis of 691 individuals in the international randomized controlled trial called PEXIVAS.

The primary outcomes of change in kidney function based on estimated glomerular filtration rate (eGFR) from baseline over 1 year and the percentage of patients with improvement in eGFR of at least 15 mL/min/1.73 m² at weeks 12, 26, and 52.

The rate of improved eGFR was significantly greater in the PLEX group, compared with controls, at 2, 4, and 8 weeks. At 4 weeks, significantly more patients in the PLEX group had an increase in eGFR by at least 15 mL/min/1.73 m², compared with the control group (relative risk [RR], 1.41; P = .008). In addition, improved kidney function within 4 weeks was significantly associated with lower risk of kidney failure within 1 year, regardless of treatment group.

The original PEXIVAS trial was supported by various government institutes and agencies from multiple countries.
 

Reinforced Vaccine Strategy with Rituximab Improved Antibody Response in AAV

A vaccine strategy consisting of a double dose of 13-valent antipneumococcal conjugate vaccine (PCV13) at day 0 and day 7 followed by a single dose of 23-valent unconjugated pneumococcal polysaccharide vaccine (PPV23) at 5 months significantly improved antibody responses against Streptococcus pneumoniae in patients with AAV, compared with standard treatment, based on data from 95 individuals in the multicenter, open-label study called PNEUMOVAS.

Adults with newly diagnosed AAV were randomly assigned to one of three treatment arms: a standard regimen of one dose of PCV13 at day 0 and one dose of PPV23 at month 5 (arm 1); a double dose of PCV13 at day 0 and day 7 with a dose of PPV23 at month 5 (arm 2); or four doses of PCV13 at day 0 and one dose of PPV23 at month 5 (arm 3). These patients received PCV13 within 2 days before or after their first infusion of rituximab.

The primary endpoint was positive antibody response against 12 pneumococcal subtypes common to the PCV13 and PCV23 vaccines at 6 months. At 6 months, the immune response to 0-3, 4-6, 7-9, or 10-12 serotypes was 83.3%, 13.3%, 3.3%, and 0%, respectively, in arm 1; 56.3%, 28.1%, 15.6%, and 0% in arm 2; and 60.6%, 33.3%, 6.1%, and 0% in arm 3.

No severe adverse events related to vaccination were observed in any of the groups; a total of eight AAV flares occurred in six patients (one in arm 1, two in arm 2, and three in arm 3). Local and systemic reactions occurred more frequently with the reinforced dose regimens, but these were mostly grade 1 or 2 local reactions.

The study was supported by the French Ministry of Health.

Some of the best clinical trials of patients with antineutrophil cytoplasmic antibody–associated vasculitis (AAV) that were presented at the 21st International Vasculitis Workshop in Barcelona, Spain, included studies addressing relapse after stopping steroids, preventing relapse with abatacept, improving kidney function with plasma exchange, and vaccinating rituximab-treated patients.
 

Stopping Steroids After Remission in GPA

In the randomized, open-label TAPIR (The Assessment of Prednisone In Remission Trial) study of 159 adults with GPA in remission who had tapered to a prednisone dose of 5 mg/day, those who remained at that dosage had a significantly lower rate of relapse after 6 months than those who tapered to 0 mg/day (4.2% vs 15.5%; P = .227), according to results reported at the meeting.

However, use of a higher dose of prednisone for disease relapse by 6 months was similar for patients who used rituximab at baseline (8.8% with 0 mg/day vs 6.1% with 5 mg/day; P = .667), and the difference in this primary outcome was more pronounced among patients who did not take rituximab at baseline (20.0% with 0 mg/day vs 2.6% with 5 mg/day; P = .023).

A higher percentage of patients taking prednisone 0 mg/day had disease relapses that were considered minor (14.1% and 4.2%; P = .0391). Major relapses occurred in none of the patients taking 5 mg/day and in 1.4% receiving 0 mg/day. About 90% of patients in either treatment arm completed the trial.

The study, funded by the National Institute of Arthritis and Musculoskelatal and Skin Diseases and the National Heart Lung and Blood Institute, was unique in that half of patients randomized in the study were enrolled at community clinics and half were enrolled at Vasculitis Clinical Research Consortium clinical centers.
 

Abatacept Falls Short for Preventing Relapse in GPA

Adding abatacept to glucocorticoids failed to reduce risk of relapse, worsening disease, or failure to reach remission in adults with relapsing, nonsevere GPA, based on data from a randomized trial of 65 individuals.

In the 20-site, randomized, double-blind ABROGATE (Abatacept for the Treatment of Relapsing, Non-Severe, Granulomatosis With Polyangiitis) study, 34 patients received 125 mg subcutaneous abatacept once a week or a placebo in addition to 30 mg/day of prednisone that was tapered and discontinued after 12 weeks. Patients who were receiving methotrexate, azathioprine, mycophenolate, or leflunomide at baseline continued the medication at a stable dose.

The primary outcome of disease worsening or relapse occurred in 62% of the abatacept group and 68% of the placebo group, and no significant difference in treatment failure rate appeared between the groups. In addition, key secondary endpoints of time to full remission, duration of glucocorticoid-free remission, relapse severity, prevention of damage, and patient-reported quality of life outcomes were not significantly different between the groups.

A total of 112 adverse events occurred, with similar type and severity between the groups, including incidence of infections.

The findings were limited by the relatively small sample size, but the results suggest a need for further research to determine mechanisms of disease and explore additional novel treatments for this rare patient population, the researchers wrote in their abstract.

The study was funded by the National Institutes of Health and Bristol-Myers Squibb.
 

Plasma Exchange Improves Kidney Function in AAV

Use of therapeutic plasma exchange (PLEX) as an adjunct treatment improved early kidney function in adults with AAV and glomerulonephritis but did not extend beyond 8 weeks, and recovery of kidney function was no different between patients receiving a regular glucocorticoid regimen versus a reduced course, based on a post-hoc analysis of 691 individuals in the international randomized controlled trial called PEXIVAS.

The primary outcomes of change in kidney function based on estimated glomerular filtration rate (eGFR) from baseline over 1 year and the percentage of patients with improvement in eGFR of at least 15 mL/min/1.73 m² at weeks 12, 26, and 52.

The rate of improved eGFR was significantly greater in the PLEX group, compared with controls, at 2, 4, and 8 weeks. At 4 weeks, significantly more patients in the PLEX group had an increase in eGFR by at least 15 mL/min/1.73 m², compared with the control group (relative risk [RR], 1.41; P = .008). In addition, improved kidney function within 4 weeks was significantly associated with lower risk of kidney failure within 1 year, regardless of treatment group.

The original PEXIVAS trial was supported by various government institutes and agencies from multiple countries.
 

Reinforced Vaccine Strategy with Rituximab Improved Antibody Response in AAV

A vaccine strategy consisting of a double dose of 13-valent antipneumococcal conjugate vaccine (PCV13) at day 0 and day 7 followed by a single dose of 23-valent unconjugated pneumococcal polysaccharide vaccine (PPV23) at 5 months significantly improved antibody responses against Streptococcus pneumoniae in patients with AAV, compared with standard treatment, based on data from 95 individuals in the multicenter, open-label study called PNEUMOVAS.

Adults with newly diagnosed AAV were randomly assigned to one of three treatment arms: a standard regimen of one dose of PCV13 at day 0 and one dose of PPV23 at month 5 (arm 1); a double dose of PCV13 at day 0 and day 7 with a dose of PPV23 at month 5 (arm 2); or four doses of PCV13 at day 0 and one dose of PPV23 at month 5 (arm 3). These patients received PCV13 within 2 days before or after their first infusion of rituximab.

The primary endpoint was positive antibody response against 12 pneumococcal subtypes common to the PCV13 and PCV23 vaccines at 6 months. At 6 months, the immune response to 0-3, 4-6, 7-9, or 10-12 serotypes was 83.3%, 13.3%, 3.3%, and 0%, respectively, in arm 1; 56.3%, 28.1%, 15.6%, and 0% in arm 2; and 60.6%, 33.3%, 6.1%, and 0% in arm 3.

No severe adverse events related to vaccination were observed in any of the groups; a total of eight AAV flares occurred in six patients (one in arm 1, two in arm 2, and three in arm 3). Local and systemic reactions occurred more frequently with the reinforced dose regimens, but these were mostly grade 1 or 2 local reactions.

The study was supported by the French Ministry of Health.

Some of the best clinical trials of patients with antineutrophil cytoplasmic antibody–associated vasculitis (AAV) that were presented at the 21st International Vasculitis Workshop in Barcelona, Spain, included studies addressing relapse after stopping steroids, preventing relapse with abatacept, improving kidney function with plasma exchange, and vaccinating rituximab-treated patients.
 

Stopping Steroids After Remission in GPA

In the randomized, open-label TAPIR (The Assessment of Prednisone In Remission Trial) study of 159 adults with GPA in remission who had tapered to a prednisone dose of 5 mg/day, those who remained at that dosage had a significantly lower rate of relapse after 6 months than those who tapered to 0 mg/day (4.2% vs 15.5%; P = .227), according to results reported at the meeting.

However, use of a higher dose of prednisone for disease relapse by 6 months was similar for patients who used rituximab at baseline (8.8% with 0 mg/day vs 6.1% with 5 mg/day; P = .667), and the difference in this primary outcome was more pronounced among patients who did not take rituximab at baseline (20.0% with 0 mg/day vs 2.6% with 5 mg/day; P = .023).

A higher percentage of patients taking prednisone 0 mg/day had disease relapses that were considered minor (14.1% and 4.2%; P = .0391). Major relapses occurred in none of the patients taking 5 mg/day and in 1.4% receiving 0 mg/day. About 90% of patients in either treatment arm completed the trial.

The study, funded by the National Institute of Arthritis and Musculoskelatal and Skin Diseases and the National Heart Lung and Blood Institute, was unique in that half of patients randomized in the study were enrolled at community clinics and half were enrolled at Vasculitis Clinical Research Consortium clinical centers.
 

Abatacept Falls Short for Preventing Relapse in GPA

Adding abatacept to glucocorticoids failed to reduce risk of relapse, worsening disease, or failure to reach remission in adults with relapsing, nonsevere GPA, based on data from a randomized trial of 65 individuals.

In the 20-site, randomized, double-blind ABROGATE (Abatacept for the Treatment of Relapsing, Non-Severe, Granulomatosis With Polyangiitis) study, 34 patients received 125 mg subcutaneous abatacept once a week or a placebo in addition to 30 mg/day of prednisone that was tapered and discontinued after 12 weeks. Patients who were receiving methotrexate, azathioprine, mycophenolate, or leflunomide at baseline continued the medication at a stable dose.

The primary outcome of disease worsening or relapse occurred in 62% of the abatacept group and 68% of the placebo group, and no significant difference in treatment failure rate appeared between the groups. In addition, key secondary endpoints of time to full remission, duration of glucocorticoid-free remission, relapse severity, prevention of damage, and patient-reported quality of life outcomes were not significantly different between the groups.

A total of 112 adverse events occurred, with similar type and severity between the groups, including incidence of infections.

The findings were limited by the relatively small sample size, but the results suggest a need for further research to determine mechanisms of disease and explore additional novel treatments for this rare patient population, the researchers wrote in their abstract.

The study was funded by the National Institutes of Health and Bristol-Myers Squibb.
 

Plasma Exchange Improves Kidney Function in AAV

Use of therapeutic plasma exchange (PLEX) as an adjunct treatment improved early kidney function in adults with AAV and glomerulonephritis but did not extend beyond 8 weeks, and recovery of kidney function was no different between patients receiving a regular glucocorticoid regimen versus a reduced course, based on a post-hoc analysis of 691 individuals in the international randomized controlled trial called PEXIVAS.

The primary outcomes of change in kidney function based on estimated glomerular filtration rate (eGFR) from baseline over 1 year and the percentage of patients with improvement in eGFR of at least 15 mL/min/1.73 m² at weeks 12, 26, and 52.

The rate of improved eGFR was significantly greater in the PLEX group, compared with controls, at 2, 4, and 8 weeks. At 4 weeks, significantly more patients in the PLEX group had an increase in eGFR by at least 15 mL/min/1.73 m², compared with the control group (relative risk [RR], 1.41; P = .008). In addition, improved kidney function within 4 weeks was significantly associated with lower risk of kidney failure within 1 year, regardless of treatment group.

The original PEXIVAS trial was supported by various government institutes and agencies from multiple countries.
 

Reinforced Vaccine Strategy with Rituximab Improved Antibody Response in AAV

A vaccine strategy consisting of a double dose of 13-valent antipneumococcal conjugate vaccine (PCV13) at day 0 and day 7 followed by a single dose of 23-valent unconjugated pneumococcal polysaccharide vaccine (PPV23) at 5 months significantly improved antibody responses against Streptococcus pneumoniae in patients with AAV, compared with standard treatment, based on data from 95 individuals in the multicenter, open-label study called PNEUMOVAS.

Adults with newly diagnosed AAV were randomly assigned to one of three treatment arms: a standard regimen of one dose of PCV13 at day 0 and one dose of PPV23 at month 5 (arm 1); a double dose of PCV13 at day 0 and day 7 with a dose of PPV23 at month 5 (arm 2); or four doses of PCV13 at day 0 and one dose of PPV23 at month 5 (arm 3). These patients received PCV13 within 2 days before or after their first infusion of rituximab.

The primary endpoint was positive antibody response against 12 pneumococcal subtypes common to the PCV13 and PCV23 vaccines at 6 months. At 6 months, the immune response to 0-3, 4-6, 7-9, or 10-12 serotypes was 83.3%, 13.3%, 3.3%, and 0%, respectively, in arm 1; 56.3%, 28.1%, 15.6%, and 0% in arm 2; and 60.6%, 33.3%, 6.1%, and 0% in arm 3.

No severe adverse events related to vaccination were observed in any of the groups; a total of eight AAV flares occurred in six patients (one in arm 1, two in arm 2, and three in arm 3). Local and systemic reactions occurred more frequently with the reinforced dose regimens, but these were mostly grade 1 or 2 local reactions.

The study was supported by the French Ministry of Health.

TOPLINE:

Both labial and parotid salivary glands can be used for the diagnosis of Sjögren syndrome (SjS), as their biopsies show largely similar histopathologic features in patients with sicca complaints suspected of having SjS.

METHODOLOGY:

• While a labial gland biopsy is the conventional method for diagnosing SjS, a biopsy of the parotid gland is preferable, as it allows for repeat measurements and increases the possibility of finding a mucosa-associated lymphoid tissue lymphoma.
• In this prospective study, researchers compared the focus score (FS) and other histopathologic features of SjS between paired labial and parotid salivary gland biopsies in a diagnostic cohort of patients with sicca suspected of having SjS.
• Labial and parotid gland biopsies were simultaneously obtained under local infiltration anesthesia in 99 patients with oral and/or ocular sicca complaints at the University Medical Center Groningen, Groningen, the Netherlands, between 2014 and 2017.
• FS is defined as the number of foci per 4 mm2 of salivary gland tissue. An FS ≥ 1 indicates a positive diagnosis of SjS.
• On the basis of an expert opinion of three experienced rheumatologists, 36 patients were diagnosed with SjS, and 63 were diagnosed with non-SjS sicca.

TAKEAWAY:

• The absolute agreement of various histopathologic features was high between labial and parotid biopsies, with values being 80% for FS, 89% for germinal centers, 84% for the immunoglobulin (Ig) A/IgG plasma cell shift, and 93% for pre-lymphoepithelial lesions.
• However, an FS ≥ 1 was more frequently seen in labial glands than in parotid glands (P = .012) in both the SjS and non-SjS sicca populations, indicating that labial gland biopsies show more inflammation irrespective of the presence of SjS.
• In patients with SjS, the absolute B-lymphocyte count, the number of germinal centers per mm², and the severity of pre-lymphoepithelial lesions were higher in parotid glands than in labial glands, revealing evident histopathologic signs of B-lymphocyte hyperactivity.

IN PRACTICE:

“The results of this study offer novel insights into the pathophysiology of pSS [primary Sjögren syndrome] and can be incorporated into guidelines for the histopathological analysis of salivary gland biopsies,” the authors wrote.

SOURCE:

This study, led by Uzma Nakshbandi, MD, Department of Reumatology & Clinical Immunology, University Medical Center Groningen, Groningen, the Netherlands, was published online in Rheumatology (Oxford).

LIMITATIONS:

This study did not discuss any limitations.

DISCLOSURES:

This study was funded by the National Institutes of Health. One of the authors disclosed serving as a consultant and scientific advisory board member for several pharmaceutical companies, as well as receiving speaker’s fees from some of them.

A version of this article appeared on Medscape.com.

TOPLINE:

Both labial and parotid salivary glands can be used for the diagnosis of Sjögren syndrome (SjS), as their biopsies show largely similar histopathologic features in patients with sicca complaints suspected of having SjS.

METHODOLOGY:

• While a labial gland biopsy is the conventional method for diagnosing SjS, a biopsy of the parotid gland is preferable, as it allows for repeat measurements and increases the possibility of finding a mucosa-associated lymphoid tissue lymphoma.
• In this prospective study, researchers compared the focus score (FS) and other histopathologic features of SjS between paired labial and parotid salivary gland biopsies in a diagnostic cohort of patients with sicca suspected of having SjS.
• Labial and parotid gland biopsies were simultaneously obtained under local infiltration anesthesia in 99 patients with oral and/or ocular sicca complaints at the University Medical Center Groningen, Groningen, the Netherlands, between 2014 and 2017.
• FS is defined as the number of foci per 4 mm2 of salivary gland tissue. An FS ≥ 1 indicates a positive diagnosis of SjS.
• On the basis of an expert opinion of three experienced rheumatologists, 36 patients were diagnosed with SjS, and 63 were diagnosed with non-SjS sicca.

TAKEAWAY:

• The absolute agreement of various histopathologic features was high between labial and parotid biopsies, with values being 80% for FS, 89% for germinal centers, 84% for the immunoglobulin (Ig) A/IgG plasma cell shift, and 93% for pre-lymphoepithelial lesions.
• However, an FS ≥ 1 was more frequently seen in labial glands than in parotid glands (P = .012) in both the SjS and non-SjS sicca populations, indicating that labial gland biopsies show more inflammation irrespective of the presence of SjS.
• In patients with SjS, the absolute B-lymphocyte count, the number of germinal centers per mm², and the severity of pre-lymphoepithelial lesions were higher in parotid glands than in labial glands, revealing evident histopathologic signs of B-lymphocyte hyperactivity.

IN PRACTICE:

“The results of this study offer novel insights into the pathophysiology of pSS [primary Sjögren syndrome] and can be incorporated into guidelines for the histopathological analysis of salivary gland biopsies,” the authors wrote.

SOURCE:

This study, led by Uzma Nakshbandi, MD, Department of Reumatology & Clinical Immunology, University Medical Center Groningen, Groningen, the Netherlands, was published online in Rheumatology (Oxford).

LIMITATIONS:

This study did not discuss any limitations.

DISCLOSURES:

This study was funded by the National Institutes of Health. One of the authors disclosed serving as a consultant and scientific advisory board member for several pharmaceutical companies, as well as receiving speaker’s fees from some of them.

A version of this article appeared on Medscape.com.

TOPLINE:

Both labial and parotid salivary glands can be used for the diagnosis of Sjögren syndrome (SjS), as their biopsies show largely similar histopathologic features in patients with sicca complaints suspected of having SjS.

METHODOLOGY:

• While a labial gland biopsy is the conventional method for diagnosing SjS, a biopsy of the parotid gland is preferable, as it allows for repeat measurements and increases the possibility of finding a mucosa-associated lymphoid tissue lymphoma.
• In this prospective study, researchers compared the focus score (FS) and other histopathologic features of SjS between paired labial and parotid salivary gland biopsies in a diagnostic cohort of patients with sicca suspected of having SjS.
• Labial and parotid gland biopsies were simultaneously obtained under local infiltration anesthesia in 99 patients with oral and/or ocular sicca complaints at the University Medical Center Groningen, Groningen, the Netherlands, between 2014 and 2017.
• FS is defined as the number of foci per 4 mm2 of salivary gland tissue. An FS ≥ 1 indicates a positive diagnosis of SjS.
• On the basis of an expert opinion of three experienced rheumatologists, 36 patients were diagnosed with SjS, and 63 were diagnosed with non-SjS sicca.

TAKEAWAY:

• The absolute agreement of various histopathologic features was high between labial and parotid biopsies, with values being 80% for FS, 89% for germinal centers, 84% for the immunoglobulin (Ig) A/IgG plasma cell shift, and 93% for pre-lymphoepithelial lesions.
• However, an FS ≥ 1 was more frequently seen in labial glands than in parotid glands (P = .012) in both the SjS and non-SjS sicca populations, indicating that labial gland biopsies show more inflammation irrespective of the presence of SjS.
• In patients with SjS, the absolute B-lymphocyte count, the number of germinal centers per mm², and the severity of pre-lymphoepithelial lesions were higher in parotid glands than in labial glands, revealing evident histopathologic signs of B-lymphocyte hyperactivity.

IN PRACTICE:

“The results of this study offer novel insights into the pathophysiology of pSS [primary Sjögren syndrome] and can be incorporated into guidelines for the histopathological analysis of salivary gland biopsies,” the authors wrote.

SOURCE:

This study, led by Uzma Nakshbandi, MD, Department of Reumatology & Clinical Immunology, University Medical Center Groningen, Groningen, the Netherlands, was published online in Rheumatology (Oxford).

LIMITATIONS:

This study did not discuss any limitations.

DISCLOSURES:

This study was funded by the National Institutes of Health. One of the authors disclosed serving as a consultant and scientific advisory board member for several pharmaceutical companies, as well as receiving speaker’s fees from some of them.

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has approved the launch of the first clinical trial for chimeric antigen receptor (CAR) T-cell therapy in children with systemic lupus erythematosus.

The trial, called Reversing Autoimmunity through Cell Therapy (REACT-01), will take place at Seattle Children’s Hospital in Washington State and is expected to begin this summer.

The CAR-T therapy will target CD19 positive B-cells, an approach that has had promising results in a small number of adult patients. While the FDA has approved a number of clinical trials using CAR-T therapy to treat autoimmune diseases in adults, this is the first authorization for a CAR T-cell therapy trial to treat autoimmune disease in children.

REACT-01 will enroll 12 individuals under 18 years of age, Shaun W. Jackson, MD, PhD, the principal investigator of the trial and attending physician in Pediatric Nephrology and Pediatric Rheumatology at Seattle Children’s Hospital, told this news organization. 

The trial will be initiated in separate phases, using three age cohorts. The first phase will enroll three individuals aged at least 17 years, before moving to the second phase and enrolling three individuals aged 12-17 years. Then, phase 3 will also include children aged 5-12 years.

To be eligible for the trial, participants must have failed at least two standard immunosuppressive therapies as well as have evidence of active lupus disease affecting a major organ system, such as the heart, lungs, and kidneys.

“Seattle Children’s Hospital will be the only site for this study, although patients can travel to Seattle to receive the therapy and then return back to their primary center for ongoing care,” Dr. Jackson said. 

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has approved the launch of the first clinical trial for chimeric antigen receptor (CAR) T-cell therapy in children with systemic lupus erythematosus.

The trial, called Reversing Autoimmunity through Cell Therapy (REACT-01), will take place at Seattle Children’s Hospital in Washington State and is expected to begin this summer.

The CAR-T therapy will target CD19 positive B-cells, an approach that has had promising results in a small number of adult patients. While the FDA has approved a number of clinical trials using CAR-T therapy to treat autoimmune diseases in adults, this is the first authorization for a CAR T-cell therapy trial to treat autoimmune disease in children.

REACT-01 will enroll 12 individuals under 18 years of age, Shaun W. Jackson, MD, PhD, the principal investigator of the trial and attending physician in Pediatric Nephrology and Pediatric Rheumatology at Seattle Children’s Hospital, told this news organization. 

The trial will be initiated in separate phases, using three age cohorts. The first phase will enroll three individuals aged at least 17 years, before moving to the second phase and enrolling three individuals aged 12-17 years. Then, phase 3 will also include children aged 5-12 years.

To be eligible for the trial, participants must have failed at least two standard immunosuppressive therapies as well as have evidence of active lupus disease affecting a major organ system, such as the heart, lungs, and kidneys.

“Seattle Children’s Hospital will be the only site for this study, although patients can travel to Seattle to receive the therapy and then return back to their primary center for ongoing care,” Dr. Jackson said. 

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has approved the launch of the first clinical trial for chimeric antigen receptor (CAR) T-cell therapy in children with systemic lupus erythematosus.

The trial, called Reversing Autoimmunity through Cell Therapy (REACT-01), will take place at Seattle Children’s Hospital in Washington State and is expected to begin this summer.

The CAR-T therapy will target CD19 positive B-cells, an approach that has had promising results in a small number of adult patients. While the FDA has approved a number of clinical trials using CAR-T therapy to treat autoimmune diseases in adults, this is the first authorization for a CAR T-cell therapy trial to treat autoimmune disease in children.

REACT-01 will enroll 12 individuals under 18 years of age, Shaun W. Jackson, MD, PhD, the principal investigator of the trial and attending physician in Pediatric Nephrology and Pediatric Rheumatology at Seattle Children’s Hospital, told this news organization. 

The trial will be initiated in separate phases, using three age cohorts. The first phase will enroll three individuals aged at least 17 years, before moving to the second phase and enrolling three individuals aged 12-17 years. Then, phase 3 will also include children aged 5-12 years.

To be eligible for the trial, participants must have failed at least two standard immunosuppressive therapies as well as have evidence of active lupus disease affecting a major organ system, such as the heart, lungs, and kidneys.

“Seattle Children’s Hospital will be the only site for this study, although patients can travel to Seattle to receive the therapy and then return back to their primary center for ongoing care,” Dr. Jackson said. 

A version of this article appeared on Medscape.com.

TOPLINE:

The rates of screening for latent tuberculosis remain suboptimal among new users of biologic and targeted synthetic disease-modifying antirheumatic drugs (b/tsDMARDs), with notable variations by medication type and demographic characteristics. 

METHODOLOGY:

• Professional society guidelines recommend screening for tuberculosis before starting treatment with most b/tsDMARDs.
• In an attempt to estimate the extent of latent tuberculosis screening, researchers combined claims and electronic health record datasets to evaluate 2853 new b/tsDMARD users (mean age, 73 years; 72% women; and 73% non-Hispanic White).
• The primary analysis focused on assessing the proportion of patients screened for latent tuberculosis in the year before starting a new b/tsDMARD.
• A sensitivity analysis evaluated the extent of screening within the 3 years preceding the initiation of a new b/tsDMARD.
• A total of 65.6% of patients received screening for latent tuberculosis in the year before initiating a new b/tsDMARD.
• Screening rates improved only slightly on expanding the window to 3 years, with 72.9% of patients receiving any tuberculosis screening.
• When stratified by drug type, over half of new users of Janus kinase inhibitors and nearly 90% of new users of interleukin-17 inhibitors had not received screening.
• Hispanic patients had lower odds of tuberculosis screening within 1 year than White patients (odds ratio [OR], 0.64; 95% CI, 0.46-0.90), as did those in the highest socioeconomic quartile, compared with the lowest (OR, 0.61; 95% CI, 0.40-0.94).

IN PRACTICE:

“Educational initiatives, team-based care delivery, task shifting, and technological interventions to address observed gaps in patient safety procedures are needed,” the authors wrote.

SOURCE:

The study was led by Eric T. Roberts, PhD, University of California, San Francisco, and published online in Arthritis Care & Research

LIMITATIONS:

The study lacked access to scanned documents or clinical notes, which may have resulted in the omission of a small number of tests that had no Medicare billing. Moreover, the study was restricted to a 3-year lookback period, potentially missing some remote screenings. The findings may have limited generalizability to younger patients or those not dually eligible for Medicare and Medicaid.

DISCLOSURES:

This study was funded by grants from the Agency for Healthcare Research and Quality and the National Institute for Arthritis and Musculoskeletal and Skin Diseases. The authors declared no conflicts of interest.

A version of this article appeared on Medscape.com.

TOPLINE:

The rates of screening for latent tuberculosis remain suboptimal among new users of biologic and targeted synthetic disease-modifying antirheumatic drugs (b/tsDMARDs), with notable variations by medication type and demographic characteristics. 

METHODOLOGY:

• Professional society guidelines recommend screening for tuberculosis before starting treatment with most b/tsDMARDs.
• In an attempt to estimate the extent of latent tuberculosis screening, researchers combined claims and electronic health record datasets to evaluate 2853 new b/tsDMARD users (mean age, 73 years; 72% women; and 73% non-Hispanic White).
• The primary analysis focused on assessing the proportion of patients screened for latent tuberculosis in the year before starting a new b/tsDMARD.
• A sensitivity analysis evaluated the extent of screening within the 3 years preceding the initiation of a new b/tsDMARD.
• A total of 65.6% of patients received screening for latent tuberculosis in the year before initiating a new b/tsDMARD.
• Screening rates improved only slightly on expanding the window to 3 years, with 72.9% of patients receiving any tuberculosis screening.
• When stratified by drug type, over half of new users of Janus kinase inhibitors and nearly 90% of new users of interleukin-17 inhibitors had not received screening.
• Hispanic patients had lower odds of tuberculosis screening within 1 year than White patients (odds ratio [OR], 0.64; 95% CI, 0.46-0.90), as did those in the highest socioeconomic quartile, compared with the lowest (OR, 0.61; 95% CI, 0.40-0.94).

IN PRACTICE:

“Educational initiatives, team-based care delivery, task shifting, and technological interventions to address observed gaps in patient safety procedures are needed,” the authors wrote.

SOURCE:

The study was led by Eric T. Roberts, PhD, University of California, San Francisco, and published online in Arthritis Care & Research

LIMITATIONS:

The study lacked access to scanned documents or clinical notes, which may have resulted in the omission of a small number of tests that had no Medicare billing. Moreover, the study was restricted to a 3-year lookback period, potentially missing some remote screenings. The findings may have limited generalizability to younger patients or those not dually eligible for Medicare and Medicaid.

DISCLOSURES:

This study was funded by grants from the Agency for Healthcare Research and Quality and the National Institute for Arthritis and Musculoskeletal and Skin Diseases. The authors declared no conflicts of interest.

A version of this article appeared on Medscape.com.

TOPLINE:

The rates of screening for latent tuberculosis remain suboptimal among new users of biologic and targeted synthetic disease-modifying antirheumatic drugs (b/tsDMARDs), with notable variations by medication type and demographic characteristics. 

METHODOLOGY:

• Professional society guidelines recommend screening for tuberculosis before starting treatment with most b/tsDMARDs.
• In an attempt to estimate the extent of latent tuberculosis screening, researchers combined claims and electronic health record datasets to evaluate 2853 new b/tsDMARD users (mean age, 73 years; 72% women; and 73% non-Hispanic White).
• The primary analysis focused on assessing the proportion of patients screened for latent tuberculosis in the year before starting a new b/tsDMARD.
• A sensitivity analysis evaluated the extent of screening within the 3 years preceding the initiation of a new b/tsDMARD.
• A total of 65.6% of patients received screening for latent tuberculosis in the year before initiating a new b/tsDMARD.
• Screening rates improved only slightly on expanding the window to 3 years, with 72.9% of patients receiving any tuberculosis screening.
• When stratified by drug type, over half of new users of Janus kinase inhibitors and nearly 90% of new users of interleukin-17 inhibitors had not received screening.
• Hispanic patients had lower odds of tuberculosis screening within 1 year than White patients (odds ratio [OR], 0.64; 95% CI, 0.46-0.90), as did those in the highest socioeconomic quartile, compared with the lowest (OR, 0.61; 95% CI, 0.40-0.94).

IN PRACTICE:

“Educational initiatives, team-based care delivery, task shifting, and technological interventions to address observed gaps in patient safety procedures are needed,” the authors wrote.

SOURCE:

The study was led by Eric T. Roberts, PhD, University of California, San Francisco, and published online in Arthritis Care & Research

LIMITATIONS:

The study lacked access to scanned documents or clinical notes, which may have resulted in the omission of a small number of tests that had no Medicare billing. Moreover, the study was restricted to a 3-year lookback period, potentially missing some remote screenings. The findings may have limited generalizability to younger patients or those not dually eligible for Medicare and Medicaid.

DISCLOSURES:

This study was funded by grants from the Agency for Healthcare Research and Quality and the National Institute for Arthritis and Musculoskeletal and Skin Diseases. The authors declared no conflicts of interest.

A version of this article appeared on Medscape.com.

Female bias in autoimmune disease can be profound, with nine females developing lupus for every male affected, and nearly twice that ratio seen in Sjögren disease.

For years, researchers have worked to determine the reasons for sex-linked differences in immune response and autoimmunity, with environmental factors, sex hormones, and X-chromosome inactivation — the process by which a second X chromosome is silenced — all seen as having roles.

More recently, different groups of researchers have homed in on a long noncoding RNA fragment called X-inactive specific transcript, or Xist, as a potential driver of sex bias in autoimmune disease. Xist, which occurs in female mammals, has been known since the 1990s as the master regulator of X-chromosome inactivation, the process by which the second X chromosome is silenced, averting a fatal double dose of X-linked genes.

The inactivation process, which scientists liken to wrapping the extra X with a fluffy cloud of proteins, occurs early in embryonic development. After its initial work silencing the X, Xist is produced throughout the female’s life, allowing X inactivation to be maintained.

But is it possible that Xist, and the many dozens of proteins it recruits to keep that extra X chromosome silent, can also provoke autoimmunity? This is the question that several teams of researchers have been grappling with, resulting in provocative findings and opening exciting new avenues of discovery.
 

Xist Protein Complexes Make Male Mice Vulnerable to Lupus

In February, researchers Howard Chang, MD, PhD, and Diana Dou, PhD, of Stanford University in Stanford, California, made worldwide news when they published results from an experiment using male mice genetically engineered to carry a non-silencing form of Xist on one of their chromosomes.

Xist acts like a scaffold, recruiting multiple protein complexes to help it do its job. Dr. Dou explained in an interview that her team has been eyeing suspiciously for years the dozens of proteins Xist recruits in the process of X-chromosome inactivation, many of which are known autoantigens.

When the mice were injected with pristane, a chemical that induces lupus-like autoimmunity in mice, the Xist-producing males developed symptoms at a rate similar to that of females, while wild-type male mice did not.

By using a male model, the scientists could determine whether Xist could cause an increased vulnerability for autoimmunity absent the influence of female hormones and development. “Everything else about the animal is male,” Dr. Dou commented. “You just add the formation of the Xist ribonucleoprotein particles — Xist RNA plus the associating proteins — to male cells that would not ordinarily have these particles. Is just having the particles present in these animals sufficient to increase their autoimmunity? This is what our paper showed: That just having expression of Xist, the presence of these Xist [ribonucleoproteins], is enough in permissive genetic backgrounds to invoke higher incidence and severity of autoimmune disease development in our pristane-induced lupus model.”

The Stanford group sees the Xist protein complex, which they have studied extensively, as a key to understanding how Xist might provoke autoimmunity. Nonetheless, Dr. Dou said, “It’s important to note that there are other contributing factors, which is why not all females develop autoimmunity, and we had very different results in our autoimmune-resistant mouse strain compared to the more autoimmune-prone strain. Xist is a factor, but many factors are required to subvert the checkpoints in immune balance and allow the progression to full-blown autoimmunity.”
 

Faulty X Inactivation and Gene Escape

The understanding that Xist might be implicated in autoimmune disease — and explain some of its female bias — is not new.

About a decade ago, Montserrat Anguera, PhD, a biologist at the University of Pennsylvania, Philadelphia, began looking at the relationship of X-chromosome inactivation, which by definition involves Xist, and lupus.

University of Pennsylvania

Dr. Anguera hypothesized that imperfect X inactivation allowed for greater escape of genes associated with immunity and autoimmunity. Studying patients with lupus, Dr. Anguera found that the silencing process was abnormal, allowing more of these genes to escape the silenced X — including toll-like receptor 7 (TLR-7) and other genes implicated in the pathogenesis of lupus.

“If you get increased expression of certain genes from the [silenced] X, like TLR-7, it can result in autoimmune disease,” Dr. Anguera said. “So what we think is that in the lupus patients, because the silencing is impacted, you’re going to have more expression happening from the inactive X. And then in conjunction with the active X, that’s going to throw off the dosage [of autoimmunity-linked genes]. You’re changing the dosage of genes, and that’s what’s critical.”

Even among patients with lupus whose symptoms are well controlled with medication, “if you look at their T cells and B cells, they still have messed up X inactivation,” Dr. Anguera said. “The Xist RNA that’s supposed to be tethered to the inactive X in a fluffy cloud is not localized, and instead is dispersed all over the nucleus.”

Dr. Anguera pointed out that autoimmune diseases are complex and can result from a combination of factors. “You also have a host of hormonal and environmental contributors, such as previous viral infections,” she said. And of course men can also develop lupus, meaning that the X chromosome cannot explain everything.

Dr. Anguera said that, while the findings by the Stanford scientists do not explain the full pathogenesis of lupus and related diseases, they still support a strong role for Xist in sex-biased autoimmune diseases. “It’s sort of another take on it,” she said.
 

Is It the Proteins, the RNA, or Both?

The Stanford team points to the proteins recruited by Xist in the process of X-chromosome inactivation as the likely trigger of autoimmunity. However, a group of researchers at Johns Hopkins University in Baltimore, Maryland, made the case in a 2022 paper that Xist RNA itself was dangerous. They found that numerous short RNA sequences within the Xist molecule serve as ligands for TLR-7. And TLR-7 ligation causes plasmacytoid dendritic cells to overproduce type 1 interferon, a classic hallmark of lupus.

Alexander Girgis

“Within rheumatology, the diseases that tend to be most female biased are the ones that are antibody positive and have this presence of upregulated interferon,” explained Brendan Antiochos, MD. “Lupus is an example of that. Sjögren’s syndrome is another. So there’s always been this quest to want to understand the mechanisms that explain why women would have more autoimmunity. And are there specific pathways which could contribute? One of the key pathways that’s been shown in humans and in mice to be important in lupus is toll-like receptor signaling.” Most convincingly, one recent study showed that people who have a gain-of-function mutation in their TLR-7 gene get a spontaneous form of lupus.

Wes Linda

These findings led Erika Darrah, PhD, and her colleague Dr. Antiochos to begin looking more deeply into which RNAs could be triggering this signaling pathway. “We started to think: Well, there is this sex bias. Could it be that women have unique RNAs that could potentially act as triggers for TLR-7 signaling?” Dr. Darrah said.

Dr. Darrah and Dr. Antiochos looked at publicly available genetic data to identify sex-biased sources of self-RNA containing TLR-7 ligands. Xist, they found, was chock full of them. “Every time we analyzed that data, no matter what filter we applied, Xist kept popping out over and over again as the most highly female skewed RNA, the RNA most likely to contain these TLR-7 binding motifs,” Dr. Darrah said. “We started to formulate the hypothesis that Xist was actually promoting responses that were dangerous and pathogenic in lupus.”

That finding led the team to conduct in-vitro experiments that showed different fragments of Xist can activate TLR-7, resulting in higher interferon production. Finally, they looked at blood and kidney cells from women with lupus and found that higher Xist expression correlated with more interferon production, and higher disease activity. “The more Xist, the sicker people were,” Dr. Darrah said.
 

Xist’s Other Functions

Xist was first studied in the 1990s, and most research has centered on its primary role in X-chromosome inactivation. A research group led by Kathrin Plath, PhD, at the University of California, Los Angeles, has been occupied for years with untangling exactly how Xist does what it does. “It’s a very clever RNA, right? It can silence the whole chromosome,” Dr. Plath said in an interview.

In 2021, Dr. Plath and her colleagues established in detail how Xist executes silencing, setting down pairs of molecules in specific spots along the chromosome and building huge protein clouds around them. “We worked on learning where Xist binds and what proteins it binds, drilling down to understand how these proteins and the RNA are coming together.”

Dr. Plath has long suspected that Xist has other functions besides X inactivation, and she and her colleagues are starting to identify them. Early this year they published the surprising finding that Xist can regulate gene expression in autosomes, or non–sex-linked chromosomes, “which it might well also do in cancer cells and lymphocytes,” Dr. Plath said. “And now there is this new evidence of an autoimmune function,” she said. “It’s a super exciting time.”

The different hypotheses surrounding Xist’s role in sex-biased autoimmunity aren’t mutually exclusive, Dr. Plath said. “There’s a tremendous enrichment of proteins occurring” during X inactivation, she said, supporting the Stanford team’s hypothesis that proteins are triggering autoimmunity. As for the Johns Hopkins researchers’ understanding that Xist RNA itself is the trigger, “I’m totally open to that,” she said. “Why can’t it be an autoantigen?”

The other model in the field, Dr. Plath noted, is the one proposed by Dr. Anguera — “that there’s [gene] escape from X-inactivation — that females have more escape expression, and that Xist is more dispersed in the lymphocytes [of patients with lupus]. In fact, Xist becoming a little dispersed might make it a better antigen. So I do think everything is possible.”

The plethora of new findings related to autoimmunity has caused Dr. Plath to consider redirecting her lab’s focus toward more translational work, “because we are obviously good at studying Xist.” Among the mysteries Dr. Plath would like to solve is how some genes manage to escape the Xist cloud.

What is needed, she said, is collaboration. “Everyone will come up with different ideas. So I think it’s good to have more people look at things together. Then the field will achieve a breakthrough treatment.”

Female bias in autoimmune disease can be profound, with nine females developing lupus for every male affected, and nearly twice that ratio seen in Sjögren disease.

For years, researchers have worked to determine the reasons for sex-linked differences in immune response and autoimmunity, with environmental factors, sex hormones, and X-chromosome inactivation — the process by which a second X chromosome is silenced — all seen as having roles.

More recently, different groups of researchers have homed in on a long noncoding RNA fragment called X-inactive specific transcript, or Xist, as a potential driver of sex bias in autoimmune disease. Xist, which occurs in female mammals, has been known since the 1990s as the master regulator of X-chromosome inactivation, the process by which the second X chromosome is silenced, averting a fatal double dose of X-linked genes.

The inactivation process, which scientists liken to wrapping the extra X with a fluffy cloud of proteins, occurs early in embryonic development. After its initial work silencing the X, Xist is produced throughout the female’s life, allowing X inactivation to be maintained.

But is it possible that Xist, and the many dozens of proteins it recruits to keep that extra X chromosome silent, can also provoke autoimmunity? This is the question that several teams of researchers have been grappling with, resulting in provocative findings and opening exciting new avenues of discovery.
 

Xist Protein Complexes Make Male Mice Vulnerable to Lupus

In February, researchers Howard Chang, MD, PhD, and Diana Dou, PhD, of Stanford University in Stanford, California, made worldwide news when they published results from an experiment using male mice genetically engineered to carry a non-silencing form of Xist on one of their chromosomes.

Xist acts like a scaffold, recruiting multiple protein complexes to help it do its job. Dr. Dou explained in an interview that her team has been eyeing suspiciously for years the dozens of proteins Xist recruits in the process of X-chromosome inactivation, many of which are known autoantigens.

When the mice were injected with pristane, a chemical that induces lupus-like autoimmunity in mice, the Xist-producing males developed symptoms at a rate similar to that of females, while wild-type male mice did not.

By using a male model, the scientists could determine whether Xist could cause an increased vulnerability for autoimmunity absent the influence of female hormones and development. “Everything else about the animal is male,” Dr. Dou commented. “You just add the formation of the Xist ribonucleoprotein particles — Xist RNA plus the associating proteins — to male cells that would not ordinarily have these particles. Is just having the particles present in these animals sufficient to increase their autoimmunity? This is what our paper showed: That just having expression of Xist, the presence of these Xist [ribonucleoproteins], is enough in permissive genetic backgrounds to invoke higher incidence and severity of autoimmune disease development in our pristane-induced lupus model.”

The Stanford group sees the Xist protein complex, which they have studied extensively, as a key to understanding how Xist might provoke autoimmunity. Nonetheless, Dr. Dou said, “It’s important to note that there are other contributing factors, which is why not all females develop autoimmunity, and we had very different results in our autoimmune-resistant mouse strain compared to the more autoimmune-prone strain. Xist is a factor, but many factors are required to subvert the checkpoints in immune balance and allow the progression to full-blown autoimmunity.”
 

Faulty X Inactivation and Gene Escape

The understanding that Xist might be implicated in autoimmune disease — and explain some of its female bias — is not new.

About a decade ago, Montserrat Anguera, PhD, a biologist at the University of Pennsylvania, Philadelphia, began looking at the relationship of X-chromosome inactivation, which by definition involves Xist, and lupus.

University of Pennsylvania

Dr. Anguera hypothesized that imperfect X inactivation allowed for greater escape of genes associated with immunity and autoimmunity. Studying patients with lupus, Dr. Anguera found that the silencing process was abnormal, allowing more of these genes to escape the silenced X — including toll-like receptor 7 (TLR-7) and other genes implicated in the pathogenesis of lupus.

“If you get increased expression of certain genes from the [silenced] X, like TLR-7, it can result in autoimmune disease,” Dr. Anguera said. “So what we think is that in the lupus patients, because the silencing is impacted, you’re going to have more expression happening from the inactive X. And then in conjunction with the active X, that’s going to throw off the dosage [of autoimmunity-linked genes]. You’re changing the dosage of genes, and that’s what’s critical.”

Even among patients with lupus whose symptoms are well controlled with medication, “if you look at their T cells and B cells, they still have messed up X inactivation,” Dr. Anguera said. “The Xist RNA that’s supposed to be tethered to the inactive X in a fluffy cloud is not localized, and instead is dispersed all over the nucleus.”

Dr. Anguera pointed out that autoimmune diseases are complex and can result from a combination of factors. “You also have a host of hormonal and environmental contributors, such as previous viral infections,” she said. And of course men can also develop lupus, meaning that the X chromosome cannot explain everything.

Dr. Anguera said that, while the findings by the Stanford scientists do not explain the full pathogenesis of lupus and related diseases, they still support a strong role for Xist in sex-biased autoimmune diseases. “It’s sort of another take on it,” she said.
 

Is It the Proteins, the RNA, or Both?

The Stanford team points to the proteins recruited by Xist in the process of X-chromosome inactivation as the likely trigger of autoimmunity. However, a group of researchers at Johns Hopkins University in Baltimore, Maryland, made the case in a 2022 paper that Xist RNA itself was dangerous. They found that numerous short RNA sequences within the Xist molecule serve as ligands for TLR-7. And TLR-7 ligation causes plasmacytoid dendritic cells to overproduce type 1 interferon, a classic hallmark of lupus.

Alexander Girgis

“Within rheumatology, the diseases that tend to be most female biased are the ones that are antibody positive and have this presence of upregulated interferon,” explained Brendan Antiochos, MD. “Lupus is an example of that. Sjögren’s syndrome is another. So there’s always been this quest to want to understand the mechanisms that explain why women would have more autoimmunity. And are there specific pathways which could contribute? One of the key pathways that’s been shown in humans and in mice to be important in lupus is toll-like receptor signaling.” Most convincingly, one recent study showed that people who have a gain-of-function mutation in their TLR-7 gene get a spontaneous form of lupus.

Wes Linda

These findings led Erika Darrah, PhD, and her colleague Dr. Antiochos to begin looking more deeply into which RNAs could be triggering this signaling pathway. “We started to think: Well, there is this sex bias. Could it be that women have unique RNAs that could potentially act as triggers for TLR-7 signaling?” Dr. Darrah said.

Dr. Darrah and Dr. Antiochos looked at publicly available genetic data to identify sex-biased sources of self-RNA containing TLR-7 ligands. Xist, they found, was chock full of them. “Every time we analyzed that data, no matter what filter we applied, Xist kept popping out over and over again as the most highly female skewed RNA, the RNA most likely to contain these TLR-7 binding motifs,” Dr. Darrah said. “We started to formulate the hypothesis that Xist was actually promoting responses that were dangerous and pathogenic in lupus.”

That finding led the team to conduct in-vitro experiments that showed different fragments of Xist can activate TLR-7, resulting in higher interferon production. Finally, they looked at blood and kidney cells from women with lupus and found that higher Xist expression correlated with more interferon production, and higher disease activity. “The more Xist, the sicker people were,” Dr. Darrah said.
 

Xist’s Other Functions

Xist was first studied in the 1990s, and most research has centered on its primary role in X-chromosome inactivation. A research group led by Kathrin Plath, PhD, at the University of California, Los Angeles, has been occupied for years with untangling exactly how Xist does what it does. “It’s a very clever RNA, right? It can silence the whole chromosome,” Dr. Plath said in an interview.

In 2021, Dr. Plath and her colleagues established in detail how Xist executes silencing, setting down pairs of molecules in specific spots along the chromosome and building huge protein clouds around them. “We worked on learning where Xist binds and what proteins it binds, drilling down to understand how these proteins and the RNA are coming together.”

Dr. Plath has long suspected that Xist has other functions besides X inactivation, and she and her colleagues are starting to identify them. Early this year they published the surprising finding that Xist can regulate gene expression in autosomes, or non–sex-linked chromosomes, “which it might well also do in cancer cells and lymphocytes,” Dr. Plath said. “And now there is this new evidence of an autoimmune function,” she said. “It’s a super exciting time.”

The different hypotheses surrounding Xist’s role in sex-biased autoimmunity aren’t mutually exclusive, Dr. Plath said. “There’s a tremendous enrichment of proteins occurring” during X inactivation, she said, supporting the Stanford team’s hypothesis that proteins are triggering autoimmunity. As for the Johns Hopkins researchers’ understanding that Xist RNA itself is the trigger, “I’m totally open to that,” she said. “Why can’t it be an autoantigen?”

The other model in the field, Dr. Plath noted, is the one proposed by Dr. Anguera — “that there’s [gene] escape from X-inactivation — that females have more escape expression, and that Xist is more dispersed in the lymphocytes [of patients with lupus]. In fact, Xist becoming a little dispersed might make it a better antigen. So I do think everything is possible.”

The plethora of new findings related to autoimmunity has caused Dr. Plath to consider redirecting her lab’s focus toward more translational work, “because we are obviously good at studying Xist.” Among the mysteries Dr. Plath would like to solve is how some genes manage to escape the Xist cloud.

What is needed, she said, is collaboration. “Everyone will come up with different ideas. So I think it’s good to have more people look at things together. Then the field will achieve a breakthrough treatment.”

Female bias in autoimmune disease can be profound, with nine females developing lupus for every male affected, and nearly twice that ratio seen in Sjögren disease.

For years, researchers have worked to determine the reasons for sex-linked differences in immune response and autoimmunity, with environmental factors, sex hormones, and X-chromosome inactivation — the process by which a second X chromosome is silenced — all seen as having roles.

More recently, different groups of researchers have homed in on a long noncoding RNA fragment called X-inactive specific transcript, or Xist, as a potential driver of sex bias in autoimmune disease. Xist, which occurs in female mammals, has been known since the 1990s as the master regulator of X-chromosome inactivation, the process by which the second X chromosome is silenced, averting a fatal double dose of X-linked genes.

The inactivation process, which scientists liken to wrapping the extra X with a fluffy cloud of proteins, occurs early in embryonic development. After its initial work silencing the X, Xist is produced throughout the female’s life, allowing X inactivation to be maintained.

But is it possible that Xist, and the many dozens of proteins it recruits to keep that extra X chromosome silent, can also provoke autoimmunity? This is the question that several teams of researchers have been grappling with, resulting in provocative findings and opening exciting new avenues of discovery.
 

Xist Protein Complexes Make Male Mice Vulnerable to Lupus

In February, researchers Howard Chang, MD, PhD, and Diana Dou, PhD, of Stanford University in Stanford, California, made worldwide news when they published results from an experiment using male mice genetically engineered to carry a non-silencing form of Xist on one of their chromosomes.

Xist acts like a scaffold, recruiting multiple protein complexes to help it do its job. Dr. Dou explained in an interview that her team has been eyeing suspiciously for years the dozens of proteins Xist recruits in the process of X-chromosome inactivation, many of which are known autoantigens.

When the mice were injected with pristane, a chemical that induces lupus-like autoimmunity in mice, the Xist-producing males developed symptoms at a rate similar to that of females, while wild-type male mice did not.

By using a male model, the scientists could determine whether Xist could cause an increased vulnerability for autoimmunity absent the influence of female hormones and development. “Everything else about the animal is male,” Dr. Dou commented. “You just add the formation of the Xist ribonucleoprotein particles — Xist RNA plus the associating proteins — to male cells that would not ordinarily have these particles. Is just having the particles present in these animals sufficient to increase their autoimmunity? This is what our paper showed: That just having expression of Xist, the presence of these Xist [ribonucleoproteins], is enough in permissive genetic backgrounds to invoke higher incidence and severity of autoimmune disease development in our pristane-induced lupus model.”

The Stanford group sees the Xist protein complex, which they have studied extensively, as a key to understanding how Xist might provoke autoimmunity. Nonetheless, Dr. Dou said, “It’s important to note that there are other contributing factors, which is why not all females develop autoimmunity, and we had very different results in our autoimmune-resistant mouse strain compared to the more autoimmune-prone strain. Xist is a factor, but many factors are required to subvert the checkpoints in immune balance and allow the progression to full-blown autoimmunity.”
 

Faulty X Inactivation and Gene Escape

The understanding that Xist might be implicated in autoimmune disease — and explain some of its female bias — is not new.

About a decade ago, Montserrat Anguera, PhD, a biologist at the University of Pennsylvania, Philadelphia, began looking at the relationship of X-chromosome inactivation, which by definition involves Xist, and lupus.

University of Pennsylvania

Dr. Anguera hypothesized that imperfect X inactivation allowed for greater escape of genes associated with immunity and autoimmunity. Studying patients with lupus, Dr. Anguera found that the silencing process was abnormal, allowing more of these genes to escape the silenced X — including toll-like receptor 7 (TLR-7) and other genes implicated in the pathogenesis of lupus.

“If you get increased expression of certain genes from the [silenced] X, like TLR-7, it can result in autoimmune disease,” Dr. Anguera said. “So what we think is that in the lupus patients, because the silencing is impacted, you’re going to have more expression happening from the inactive X. And then in conjunction with the active X, that’s going to throw off the dosage [of autoimmunity-linked genes]. You’re changing the dosage of genes, and that’s what’s critical.”

Even among patients with lupus whose symptoms are well controlled with medication, “if you look at their T cells and B cells, they still have messed up X inactivation,” Dr. Anguera said. “The Xist RNA that’s supposed to be tethered to the inactive X in a fluffy cloud is not localized, and instead is dispersed all over the nucleus.”

Dr. Anguera pointed out that autoimmune diseases are complex and can result from a combination of factors. “You also have a host of hormonal and environmental contributors, such as previous viral infections,” she said. And of course men can also develop lupus, meaning that the X chromosome cannot explain everything.

Dr. Anguera said that, while the findings by the Stanford scientists do not explain the full pathogenesis of lupus and related diseases, they still support a strong role for Xist in sex-biased autoimmune diseases. “It’s sort of another take on it,” she said.
 

Is It the Proteins, the RNA, or Both?

The Stanford team points to the proteins recruited by Xist in the process of X-chromosome inactivation as the likely trigger of autoimmunity. However, a group of researchers at Johns Hopkins University in Baltimore, Maryland, made the case in a 2022 paper that Xist RNA itself was dangerous. They found that numerous short RNA sequences within the Xist molecule serve as ligands for TLR-7. And TLR-7 ligation causes plasmacytoid dendritic cells to overproduce type 1 interferon, a classic hallmark of lupus.

Alexander Girgis

“Within rheumatology, the diseases that tend to be most female biased are the ones that are antibody positive and have this presence of upregulated interferon,” explained Brendan Antiochos, MD. “Lupus is an example of that. Sjögren’s syndrome is another. So there’s always been this quest to want to understand the mechanisms that explain why women would have more autoimmunity. And are there specific pathways which could contribute? One of the key pathways that’s been shown in humans and in mice to be important in lupus is toll-like receptor signaling.” Most convincingly, one recent study showed that people who have a gain-of-function mutation in their TLR-7 gene get a spontaneous form of lupus.

Wes Linda

These findings led Erika Darrah, PhD, and her colleague Dr. Antiochos to begin looking more deeply into which RNAs could be triggering this signaling pathway. “We started to think: Well, there is this sex bias. Could it be that women have unique RNAs that could potentially act as triggers for TLR-7 signaling?” Dr. Darrah said.

Dr. Darrah and Dr. Antiochos looked at publicly available genetic data to identify sex-biased sources of self-RNA containing TLR-7 ligands. Xist, they found, was chock full of them. “Every time we analyzed that data, no matter what filter we applied, Xist kept popping out over and over again as the most highly female skewed RNA, the RNA most likely to contain these TLR-7 binding motifs,” Dr. Darrah said. “We started to formulate the hypothesis that Xist was actually promoting responses that were dangerous and pathogenic in lupus.”

That finding led the team to conduct in-vitro experiments that showed different fragments of Xist can activate TLR-7, resulting in higher interferon production. Finally, they looked at blood and kidney cells from women with lupus and found that higher Xist expression correlated with more interferon production, and higher disease activity. “The more Xist, the sicker people were,” Dr. Darrah said.
 

Xist’s Other Functions

Xist was first studied in the 1990s, and most research has centered on its primary role in X-chromosome inactivation. A research group led by Kathrin Plath, PhD, at the University of California, Los Angeles, has been occupied for years with untangling exactly how Xist does what it does. “It’s a very clever RNA, right? It can silence the whole chromosome,” Dr. Plath said in an interview.

In 2021, Dr. Plath and her colleagues established in detail how Xist executes silencing, setting down pairs of molecules in specific spots along the chromosome and building huge protein clouds around them. “We worked on learning where Xist binds and what proteins it binds, drilling down to understand how these proteins and the RNA are coming together.”

Dr. Plath has long suspected that Xist has other functions besides X inactivation, and she and her colleagues are starting to identify them. Early this year they published the surprising finding that Xist can regulate gene expression in autosomes, or non–sex-linked chromosomes, “which it might well also do in cancer cells and lymphocytes,” Dr. Plath said. “And now there is this new evidence of an autoimmune function,” she said. “It’s a super exciting time.”

The different hypotheses surrounding Xist’s role in sex-biased autoimmunity aren’t mutually exclusive, Dr. Plath said. “There’s a tremendous enrichment of proteins occurring” during X inactivation, she said, supporting the Stanford team’s hypothesis that proteins are triggering autoimmunity. As for the Johns Hopkins researchers’ understanding that Xist RNA itself is the trigger, “I’m totally open to that,” she said. “Why can’t it be an autoantigen?”

The other model in the field, Dr. Plath noted, is the one proposed by Dr. Anguera — “that there’s [gene] escape from X-inactivation — that females have more escape expression, and that Xist is more dispersed in the lymphocytes [of patients with lupus]. In fact, Xist becoming a little dispersed might make it a better antigen. So I do think everything is possible.”

The plethora of new findings related to autoimmunity has caused Dr. Plath to consider redirecting her lab’s focus toward more translational work, “because we are obviously good at studying Xist.” Among the mysteries Dr. Plath would like to solve is how some genes manage to escape the Xist cloud.

What is needed, she said, is collaboration. “Everyone will come up with different ideas. So I think it’s good to have more people look at things together. Then the field will achieve a breakthrough treatment.”

The US Food and Drug Administration (FDA) has approved sotatercept (Winrevair, Merck), for the treatment of adults with pulmonary arterial hypertension (PAH), World Health Organization (WHO) Group 1, to increase exercise capacity, improve WHO functional class, and reduce the risk for clinical worsening events.

Sotatercept, which had breakthrough therapy designation, is a first-in-class activin signaling inhibitor that works by improving the balance between pro- and antiproliferative signaling to regulate the vascular cell proliferation that underlies PAH.

“Sotatercept added to background therapy has the potential to become a new standard-of-care option for patients with pulmonary arterial hypertension,” added coinvestigator Aaron B. Waxman, MD, PhD, executive director of the Center for Pulmonary Heart Diseases at Brigham and Women’s Hospital, Boston.

The approval was based on results of the phase 3 STELLAR study, a global, double-blind, placebo-controlled, multicenter, parallel-group clinical trial in which, 323 patients with PAH (WHO Group 1, functional class II or III) were randomly assigned 1:1 to add sotatercept or placebo to stable background therapy.

The results showed that sotatercept, administered subcutaneously every 3 weeks for 24 weeks, improved average 6-minute walk distance from baseline by a significant and clinically meaningful 40.8 meters compared with placebo for the trial’s primary efficacy endpoint (P < .001).

Sotatercept also led to significant improvement in multiple secondary outcome measures, including:

• Reduction in the risk for death from any cause or PAH clinical worsening events by 84% vs background therapy alone (number of events: 9 vs 42; hazard ratio [HR], 0.16; P < .001) 
• Improvement in FC from baseline at 24 weeks in 29% of patients compared with 14% of patients treated with placebo (P < .001) 
• Improvement in pulmonary vascular resistance (PVR), with an average 235 dyn/sec/cm⁵ reduction in PVR from baseline (P < .001) 
• Improvement from baseline in N-terminal pro–B-type natriuretic peptide (NT-proBNP) levels. The median treatment difference in NT-proBNP between sotatercept and placebo was -442 pg/mL (P < .001) 

The results were reported last year at the joint scientific sessions of the American College of Cardiology and the World Heart Federation, with simultaneous publication in The New England Journal of Medicine. 

Sotatercept injection may be administered by patients or caregivers with guidance, training, and follow-up from a healthcare provider. The recommended starting dose is 0.3 mg/kg. The recommended target dose is 0.7 mg/kg every 3 weeks.

Sotatercept may increase hemoglobin, may lead to erythrocytosis, and may decrease platelet count and lead to severe thrombocytopenia. Treatment should not be initiated if platelet count is < 50,000/mm³. 

Hemoglobin and platelets should be monitored before each dose of sotatercept for the first five doses, or longer if values are unstable, and periodically thereafter to determine if dose adjustments are required. 

Full prescribing information is available online. 

Merck estimates that sotatercept will be available for dispensing by select specialty pharmacies in the United States by the end of April 2024.

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has approved sotatercept (Winrevair, Merck), for the treatment of adults with pulmonary arterial hypertension (PAH), World Health Organization (WHO) Group 1, to increase exercise capacity, improve WHO functional class, and reduce the risk for clinical worsening events.

Sotatercept, which had breakthrough therapy designation, is a first-in-class activin signaling inhibitor that works by improving the balance between pro- and antiproliferative signaling to regulate the vascular cell proliferation that underlies PAH.

“Sotatercept added to background therapy has the potential to become a new standard-of-care option for patients with pulmonary arterial hypertension,” added coinvestigator Aaron B. Waxman, MD, PhD, executive director of the Center for Pulmonary Heart Diseases at Brigham and Women’s Hospital, Boston.

The approval was based on results of the phase 3 STELLAR study, a global, double-blind, placebo-controlled, multicenter, parallel-group clinical trial in which, 323 patients with PAH (WHO Group 1, functional class II or III) were randomly assigned 1:1 to add sotatercept or placebo to stable background therapy.

The results showed that sotatercept, administered subcutaneously every 3 weeks for 24 weeks, improved average 6-minute walk distance from baseline by a significant and clinically meaningful 40.8 meters compared with placebo for the trial’s primary efficacy endpoint (P < .001).

Sotatercept also led to significant improvement in multiple secondary outcome measures, including:

• Reduction in the risk for death from any cause or PAH clinical worsening events by 84% vs background therapy alone (number of events: 9 vs 42; hazard ratio [HR], 0.16; P < .001) 
• Improvement in FC from baseline at 24 weeks in 29% of patients compared with 14% of patients treated with placebo (P < .001) 
• Improvement in pulmonary vascular resistance (PVR), with an average 235 dyn/sec/cm⁵ reduction in PVR from baseline (P < .001) 
• Improvement from baseline in N-terminal pro–B-type natriuretic peptide (NT-proBNP) levels. The median treatment difference in NT-proBNP between sotatercept and placebo was -442 pg/mL (P < .001) 

The results were reported last year at the joint scientific sessions of the American College of Cardiology and the World Heart Federation, with simultaneous publication in The New England Journal of Medicine. 

Sotatercept injection may be administered by patients or caregivers with guidance, training, and follow-up from a healthcare provider. The recommended starting dose is 0.3 mg/kg. The recommended target dose is 0.7 mg/kg every 3 weeks.

Sotatercept may increase hemoglobin, may lead to erythrocytosis, and may decrease platelet count and lead to severe thrombocytopenia. Treatment should not be initiated if platelet count is < 50,000/mm³. 

Hemoglobin and platelets should be monitored before each dose of sotatercept for the first five doses, or longer if values are unstable, and periodically thereafter to determine if dose adjustments are required. 

Full prescribing information is available online. 

Merck estimates that sotatercept will be available for dispensing by select specialty pharmacies in the United States by the end of April 2024.

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has approved sotatercept (Winrevair, Merck), for the treatment of adults with pulmonary arterial hypertension (PAH), World Health Organization (WHO) Group 1, to increase exercise capacity, improve WHO functional class, and reduce the risk for clinical worsening events.

Sotatercept, which had breakthrough therapy designation, is a first-in-class activin signaling inhibitor that works by improving the balance between pro- and antiproliferative signaling to regulate the vascular cell proliferation that underlies PAH.

“Sotatercept added to background therapy has the potential to become a new standard-of-care option for patients with pulmonary arterial hypertension,” added coinvestigator Aaron B. Waxman, MD, PhD, executive director of the Center for Pulmonary Heart Diseases at Brigham and Women’s Hospital, Boston.

The approval was based on results of the phase 3 STELLAR study, a global, double-blind, placebo-controlled, multicenter, parallel-group clinical trial in which, 323 patients with PAH (WHO Group 1, functional class II or III) were randomly assigned 1:1 to add sotatercept or placebo to stable background therapy.

The results showed that sotatercept, administered subcutaneously every 3 weeks for 24 weeks, improved average 6-minute walk distance from baseline by a significant and clinically meaningful 40.8 meters compared with placebo for the trial’s primary efficacy endpoint (P < .001).

Sotatercept also led to significant improvement in multiple secondary outcome measures, including:

• Reduction in the risk for death from any cause or PAH clinical worsening events by 84% vs background therapy alone (number of events: 9 vs 42; hazard ratio [HR], 0.16; P < .001) 
• Improvement in FC from baseline at 24 weeks in 29% of patients compared with 14% of patients treated with placebo (P < .001) 
• Improvement in pulmonary vascular resistance (PVR), with an average 235 dyn/sec/cm⁵ reduction in PVR from baseline (P < .001) 
• Improvement from baseline in N-terminal pro–B-type natriuretic peptide (NT-proBNP) levels. The median treatment difference in NT-proBNP between sotatercept and placebo was -442 pg/mL (P < .001) 

The results were reported last year at the joint scientific sessions of the American College of Cardiology and the World Heart Federation, with simultaneous publication in The New England Journal of Medicine. 

Sotatercept injection may be administered by patients or caregivers with guidance, training, and follow-up from a healthcare provider. The recommended starting dose is 0.3 mg/kg. The recommended target dose is 0.7 mg/kg every 3 weeks.

Sotatercept may increase hemoglobin, may lead to erythrocytosis, and may decrease platelet count and lead to severe thrombocytopenia. Treatment should not be initiated if platelet count is < 50,000/mm³. 

Hemoglobin and platelets should be monitored before each dose of sotatercept for the first five doses, or longer if values are unstable, and periodically thereafter to determine if dose adjustments are required. 

Full prescribing information is available online. 

Merck estimates that sotatercept will be available for dispensing by select specialty pharmacies in the United States by the end of April 2024.

A version of this article appeared on Medscape.com.

The accumulation of multiple adverse social determinants of health is linked to worse disease at initial presentation and worse disease activity over time in children with rheumatologic conditions, according to findings presented at the annual scientific meeting of the Childhood Arthritis and Rheumatology Research Alliance.

One study revealed that cumulative factors conferring social disadvantage progressively increased the odds of active disease and functional disability in children with juvenile idiopathic arthritis (JIA). Another study similarly found that children with lupus living in neighborhoods with comparatively fewer resources for childhood opportunity had worse disease at presentation and greater disease activity over follow-up.

The findings suggest that exposure to multiple disadvantaging social variables may be linked to worse outcomes than exposure to any single factor, William Daniel Soulsby, MD, of the University of California San Francisco, told attendees in his presentation of data from the JIA study.

“Most prior studies have analyzed such determinants as independent risk factors,” Dr. Soulsby said. “However, individuals experiencing social disadvantage often face multiple social hardships that rarely act in isolation; studying these factors independently may miss underlying disparities.”

Stacy P. Ardoin, MD, MSc, professor of pediatric and adult rheumatology at Nationwide Children’s Hospital and The Ohio State University in Columbus, and vice president of CARRA, did not find the results of Soulsby’s study surprising, but she said they do “provide important confirmation of our growing understanding of the impact of social determinants of health on the outcomes of children and adolescents with chronic disease like juvenile idiopathic arthritis.” She added: “In medicine, we often think about the bench, the bedside, and the clinic, but this study tells us that if we want to improve outcomes for our patients, we also need to think about the ‘backyard,’ too.”
 

Social Disadvantage With JIA

Dr. Soulsby’s team adopted an approach similar to that of a recent National Survey of Children’s Health analysis that used a combined scoring system to calculate cumulative social disadvantage. The researchers used income level, insurance status, and education level to capture individual factors related to disadvantage and then an area deprivation index (ADI) to capture community factors. While they were unable to use any variables specific to societal factors, they included race, which is relevant at all three levels.

The cohort included 9612 patients in the CARRA Registry from July 2015 to January 2022. They included all patients who had a JIA diagnosis with onset before age 16 and at least one visit with a complete clinical Juvenile Arthritis Disease Activity Score (JADAS) score. Most of the patients (70%) were female, with an average age at enrollment of 11 and a mean time to diagnosis of 10.6 months.

Most of the patients had oligoarthritis (35.5%) or rheumatoid factor–negative polyarthritis (29.4%), followed by enthesitis-related arthritis (10.5%) and then other forms. A total of 4% of patients had a secondary rheumatologic condition. Most of the patients were White (74.9%), with 3.9% Black, 7.6% Hispanic, and 6.5% of more than one race. ADI data were missing for 17.2% of patients.

The researchers assigned a score to each patient that could add up to a maximum of 3. They received 1 point for an annual household income below $50,000, 1 point for having public insurance or no insurance, and 1 point for their guardian having no more than a high school education. Patients with a score of 0 comprised 60.9% of the patients, while 21.3% had a score of 1, 12.9% had a score of 2, and 4.9% had a score of 3.

Just over a quarter of the patients (26.3%) were underinsured, 19.1% were low income, and 16.4% had caregivers with a high school education or less. However, income level was unknown for 24.6% of patients, and guardians’ education level was unknown for 15.7% of patients.

The primary outcomes were the odds of active disease as based on clinical JADAS (at least a 1.1 score for oligoarticular JIA and more than 2.5 for all other subtypes) and odds of functional disability based on the Childhood Health Assessment Questionnaire (CHAQ). Adjustments were made for sex, race/ethnicity, age at enrollment, time to diagnosis, ADI, JIA category, presence of secondary rheumatologic disease, and medication (use of a conventional synthetic disease-modifying antirheumatic drug [DMARD], biologic DMARD, or small molecule drug).

Nearly half (48%) of patients had active disease during follow-up, with an average clinical JADAS score of 4 from the whole cohort. Compared with children with a cumulative disadvantage score of 0, each additional point on the clinical JADAS resulted in significantly increased odds of active disease. Those with the highest score of 3 were twice as likely to have active disease (adjusted odds ratio [aOR], 2.05; P < .001) as those with a score of 0, but those with a score of 1 (aOR, 1.36; P < .001) or 2 (aOR, 1.86; P < .001) were also more likely to have active disease. Other significant independent predictors of active arthritis included being of Black race (aOR, 1.55) or more than one race (aOR, 1.31).

Each of the scored factors also independently increased the likelihood of active disease by similar amounts: 1.69 higher odds for low household income on its own, 1.6 higher odds for public or no insurance, and 1.45 higher odds for high school education or less (all P < .001).

Similarly, odds of functional disability based on CHAQ increased significantly with each additional point. The mean CHAQ score was 0.31, and 46% of patients had functional disability during follow-up. Those with a cumulative social disadvantage score of 3 were three times as likely to have functional disability (aOR, 3.09; P < .001) as those with a score of 0. Those with a score of 1 (aOR, 1.82) or 2 (aOR, 2.81) were also more likely to have functional disability (P < .001). Again, Black individuals (aOR, 2.09) or those of mixed race (aOR, 1.78) had greater odds of functional disability (P < .001).

The independent factor most associated with increased odds of functional disability was a household income below $50,000 a year (OR, 3.03; P < .001), followed by having public or no insurance (OR, 2.57) or a caregiver with no more than a high school education (OR, 1.98). Dr. Soulsby noted that their study was limited by the missing data and may oversimplify the relationships between social determinants of health.

Overall, however, the findings revealed both the importance of social risk screening in the pediatric rheumatology clinic and the coupling of that screening with individual level support for patients, Dr. Soulsby said.

“This study did a great job of harnessing the power of the CARRA Registry,” said Dr. Ardoin, who was not involved in the research. “These findings underscore how important it is for all clinicians, including pediatric rheumatologists, to evaluate every child for social risks of poor outcomes,” she said.

One take-home message from the findings is that once pediatric rheumatologists identify social risks for poor outcomes in their patients, they can “consult with social workers and connect families with community resources in an effort to ameliorate social deprivation.”
 

Childhood Lupus and Reduced Childhood Opportunity

In a similar study looking at children with childhood-onset lupus, researchers similarly identified the way that compounding social determinants of health were linked to greater disease activity.

“We know that structural racism segregates children from historically marginalized groups into different neighborhoods with lower childhood opportunity,” Joyce C. Chang, MD, of Boston Children’s Hospital, told attendees. “When we talk about child opportunity, we’re really describing all of the resources and conditions that helped to promote healthy childhood development,” including factors related to education, physical health, the built environment, and social and economic security, she said.

Dr. Chang and her colleagues therefore assessed the relationship between a 29-indicator Child Opportunity Index for patients with childhood-onset lupus and the severity of their disease presentation and activity over time. They determined the Child Opportunity Index for different neighborhoods and assessed the amount of racial residential segregation around the three institutions involved in the study. Severity of lupus presentation was based on the need for intensive care unit admission or dialysis or a Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2K) score of 10 or higher. Disease activity over time was based on the SLEDAI-2K score.

The patient population included 553 patients with childhood-onset lupus from three institutions: Boston Children’s Hospital, Lurie Children’s Hospital of Chicago, and Children’s of Alabama in Birmingham, Alabama. Across the full population, 30% of the patients were Black and 30% were Hispanic, but the distribution of race and ethnicity varied by institution. Most of the Black patients, for example, were at Children’s of Alabama (59%), while 43% of the Hispanic patients were at Lurie. Across all the sites, 14% of the patients’ families preferred a non-English language as their first language, and just over half the patients (52%) had public insurance.

Dr. Chang did not have data yet from the Lurie and Alabama cohorts, so she presented preliminary data from the Boston Children’s cohort of 148 patients. In those results, children living in neighborhoods of low childhood opportunity had four times higher odds of presenting with severe disease than children living in neighborhoods of very high opportunity. Then the researchers factored in the location quotient that represented the magnitude of racial segregation in a residential area. In areas with high levels of Black vs White segregation, children were 2.5 times more likely to have a more severe initial disease presentation. However, there was not a significant difference in areas highly segregated between Hispanic and non-Hispanic residents.

After initial presentation, the data revealed a dose-dependent relationship between childhood opportunity and severity of disease activity based on SLEDAI-2K. After adjustment for insurance status, race, preferred language, age at disease onset, sex, major organ involvement, initial SLEDAI-2K score at presentation, and follow-up time, disease activity incrementally increased as childhood opportunity decreased (P < .001 for the trend).

The findings suggested that even in regions like Boston, where overall childhood opportunity is higher than the national average, “poor relative neighborhood opportunity is still associated with more severe lupus presentation, as well as higher lupus disease activity during follow-up,” Dr. Chang said. “Area-level conditions may drive inequitable outcomes at numerous points,” including initial access to subspecialty care and after establishing that care, she said.

Dr. Soulsby, Dr. Chang, and Dr. Ardoin reported having no disclosures. Dr. Soulsby’s research was funded by CARRA and the Arthritis Foundation, and Dr. Chang’s research was funded by CARRA.
 

A version of this article appeared on Medscape.com.

The accumulation of multiple adverse social determinants of health is linked to worse disease at initial presentation and worse disease activity over time in children with rheumatologic conditions, according to findings presented at the annual scientific meeting of the Childhood Arthritis and Rheumatology Research Alliance.

One study revealed that cumulative factors conferring social disadvantage progressively increased the odds of active disease and functional disability in children with juvenile idiopathic arthritis (JIA). Another study similarly found that children with lupus living in neighborhoods with comparatively fewer resources for childhood opportunity had worse disease at presentation and greater disease activity over follow-up.

The findings suggest that exposure to multiple disadvantaging social variables may be linked to worse outcomes than exposure to any single factor, William Daniel Soulsby, MD, of the University of California San Francisco, told attendees in his presentation of data from the JIA study.

“Most prior studies have analyzed such determinants as independent risk factors,” Dr. Soulsby said. “However, individuals experiencing social disadvantage often face multiple social hardships that rarely act in isolation; studying these factors independently may miss underlying disparities.”

Stacy P. Ardoin, MD, MSc, professor of pediatric and adult rheumatology at Nationwide Children’s Hospital and The Ohio State University in Columbus, and vice president of CARRA, did not find the results of Soulsby’s study surprising, but she said they do “provide important confirmation of our growing understanding of the impact of social determinants of health on the outcomes of children and adolescents with chronic disease like juvenile idiopathic arthritis.” She added: “In medicine, we often think about the bench, the bedside, and the clinic, but this study tells us that if we want to improve outcomes for our patients, we also need to think about the ‘backyard,’ too.”
 

Social Disadvantage With JIA

Dr. Soulsby’s team adopted an approach similar to that of a recent National Survey of Children’s Health analysis that used a combined scoring system to calculate cumulative social disadvantage. The researchers used income level, insurance status, and education level to capture individual factors related to disadvantage and then an area deprivation index (ADI) to capture community factors. While they were unable to use any variables specific to societal factors, they included race, which is relevant at all three levels.

The cohort included 9612 patients in the CARRA Registry from July 2015 to January 2022. They included all patients who had a JIA diagnosis with onset before age 16 and at least one visit with a complete clinical Juvenile Arthritis Disease Activity Score (JADAS) score. Most of the patients (70%) were female, with an average age at enrollment of 11 and a mean time to diagnosis of 10.6 months.

Most of the patients had oligoarthritis (35.5%) or rheumatoid factor–negative polyarthritis (29.4%), followed by enthesitis-related arthritis (10.5%) and then other forms. A total of 4% of patients had a secondary rheumatologic condition. Most of the patients were White (74.9%), with 3.9% Black, 7.6% Hispanic, and 6.5% of more than one race. ADI data were missing for 17.2% of patients.

The researchers assigned a score to each patient that could add up to a maximum of 3. They received 1 point for an annual household income below $50,000, 1 point for having public insurance or no insurance, and 1 point for their guardian having no more than a high school education. Patients with a score of 0 comprised 60.9% of the patients, while 21.3% had a score of 1, 12.9% had a score of 2, and 4.9% had a score of 3.

Just over a quarter of the patients (26.3%) were underinsured, 19.1% were low income, and 16.4% had caregivers with a high school education or less. However, income level was unknown for 24.6% of patients, and guardians’ education level was unknown for 15.7% of patients.

The primary outcomes were the odds of active disease as based on clinical JADAS (at least a 1.1 score for oligoarticular JIA and more than 2.5 for all other subtypes) and odds of functional disability based on the Childhood Health Assessment Questionnaire (CHAQ). Adjustments were made for sex, race/ethnicity, age at enrollment, time to diagnosis, ADI, JIA category, presence of secondary rheumatologic disease, and medication (use of a conventional synthetic disease-modifying antirheumatic drug [DMARD], biologic DMARD, or small molecule drug).

Nearly half (48%) of patients had active disease during follow-up, with an average clinical JADAS score of 4 from the whole cohort. Compared with children with a cumulative disadvantage score of 0, each additional point on the clinical JADAS resulted in significantly increased odds of active disease. Those with the highest score of 3 were twice as likely to have active disease (adjusted odds ratio [aOR], 2.05; P < .001) as those with a score of 0, but those with a score of 1 (aOR, 1.36; P < .001) or 2 (aOR, 1.86; P < .001) were also more likely to have active disease. Other significant independent predictors of active arthritis included being of Black race (aOR, 1.55) or more than one race (aOR, 1.31).

Each of the scored factors also independently increased the likelihood of active disease by similar amounts: 1.69 higher odds for low household income on its own, 1.6 higher odds for public or no insurance, and 1.45 higher odds for high school education or less (all P < .001).

Similarly, odds of functional disability based on CHAQ increased significantly with each additional point. The mean CHAQ score was 0.31, and 46% of patients had functional disability during follow-up. Those with a cumulative social disadvantage score of 3 were three times as likely to have functional disability (aOR, 3.09; P < .001) as those with a score of 0. Those with a score of 1 (aOR, 1.82) or 2 (aOR, 2.81) were also more likely to have functional disability (P < .001). Again, Black individuals (aOR, 2.09) or those of mixed race (aOR, 1.78) had greater odds of functional disability (P < .001).

The independent factor most associated with increased odds of functional disability was a household income below $50,000 a year (OR, 3.03; P < .001), followed by having public or no insurance (OR, 2.57) or a caregiver with no more than a high school education (OR, 1.98). Dr. Soulsby noted that their study was limited by the missing data and may oversimplify the relationships between social determinants of health.

Overall, however, the findings revealed both the importance of social risk screening in the pediatric rheumatology clinic and the coupling of that screening with individual level support for patients, Dr. Soulsby said.

“This study did a great job of harnessing the power of the CARRA Registry,” said Dr. Ardoin, who was not involved in the research. “These findings underscore how important it is for all clinicians, including pediatric rheumatologists, to evaluate every child for social risks of poor outcomes,” she said.

One take-home message from the findings is that once pediatric rheumatologists identify social risks for poor outcomes in their patients, they can “consult with social workers and connect families with community resources in an effort to ameliorate social deprivation.”
 

Childhood Lupus and Reduced Childhood Opportunity

In a similar study looking at children with childhood-onset lupus, researchers similarly identified the way that compounding social determinants of health were linked to greater disease activity.

“We know that structural racism segregates children from historically marginalized groups into different neighborhoods with lower childhood opportunity,” Joyce C. Chang, MD, of Boston Children’s Hospital, told attendees. “When we talk about child opportunity, we’re really describing all of the resources and conditions that helped to promote healthy childhood development,” including factors related to education, physical health, the built environment, and social and economic security, she said.

Dr. Chang and her colleagues therefore assessed the relationship between a 29-indicator Child Opportunity Index for patients with childhood-onset lupus and the severity of their disease presentation and activity over time. They determined the Child Opportunity Index for different neighborhoods and assessed the amount of racial residential segregation around the three institutions involved in the study. Severity of lupus presentation was based on the need for intensive care unit admission or dialysis or a Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2K) score of 10 or higher. Disease activity over time was based on the SLEDAI-2K score.

The patient population included 553 patients with childhood-onset lupus from three institutions: Boston Children’s Hospital, Lurie Children’s Hospital of Chicago, and Children’s of Alabama in Birmingham, Alabama. Across the full population, 30% of the patients were Black and 30% were Hispanic, but the distribution of race and ethnicity varied by institution. Most of the Black patients, for example, were at Children’s of Alabama (59%), while 43% of the Hispanic patients were at Lurie. Across all the sites, 14% of the patients’ families preferred a non-English language as their first language, and just over half the patients (52%) had public insurance.

Dr. Chang did not have data yet from the Lurie and Alabama cohorts, so she presented preliminary data from the Boston Children’s cohort of 148 patients. In those results, children living in neighborhoods of low childhood opportunity had four times higher odds of presenting with severe disease than children living in neighborhoods of very high opportunity. Then the researchers factored in the location quotient that represented the magnitude of racial segregation in a residential area. In areas with high levels of Black vs White segregation, children were 2.5 times more likely to have a more severe initial disease presentation. However, there was not a significant difference in areas highly segregated between Hispanic and non-Hispanic residents.

After initial presentation, the data revealed a dose-dependent relationship between childhood opportunity and severity of disease activity based on SLEDAI-2K. After adjustment for insurance status, race, preferred language, age at disease onset, sex, major organ involvement, initial SLEDAI-2K score at presentation, and follow-up time, disease activity incrementally increased as childhood opportunity decreased (P < .001 for the trend).

The findings suggested that even in regions like Boston, where overall childhood opportunity is higher than the national average, “poor relative neighborhood opportunity is still associated with more severe lupus presentation, as well as higher lupus disease activity during follow-up,” Dr. Chang said. “Area-level conditions may drive inequitable outcomes at numerous points,” including initial access to subspecialty care and after establishing that care, she said.

Dr. Soulsby, Dr. Chang, and Dr. Ardoin reported having no disclosures. Dr. Soulsby’s research was funded by CARRA and the Arthritis Foundation, and Dr. Chang’s research was funded by CARRA.
 

A version of this article appeared on Medscape.com.

The accumulation of multiple adverse social determinants of health is linked to worse disease at initial presentation and worse disease activity over time in children with rheumatologic conditions, according to findings presented at the annual scientific meeting of the Childhood Arthritis and Rheumatology Research Alliance.

One study revealed that cumulative factors conferring social disadvantage progressively increased the odds of active disease and functional disability in children with juvenile idiopathic arthritis (JIA). Another study similarly found that children with lupus living in neighborhoods with comparatively fewer resources for childhood opportunity had worse disease at presentation and greater disease activity over follow-up.

The findings suggest that exposure to multiple disadvantaging social variables may be linked to worse outcomes than exposure to any single factor, William Daniel Soulsby, MD, of the University of California San Francisco, told attendees in his presentation of data from the JIA study.

“Most prior studies have analyzed such determinants as independent risk factors,” Dr. Soulsby said. “However, individuals experiencing social disadvantage often face multiple social hardships that rarely act in isolation; studying these factors independently may miss underlying disparities.”

Stacy P. Ardoin, MD, MSc, professor of pediatric and adult rheumatology at Nationwide Children’s Hospital and The Ohio State University in Columbus, and vice president of CARRA, did not find the results of Soulsby’s study surprising, but she said they do “provide important confirmation of our growing understanding of the impact of social determinants of health on the outcomes of children and adolescents with chronic disease like juvenile idiopathic arthritis.” She added: “In medicine, we often think about the bench, the bedside, and the clinic, but this study tells us that if we want to improve outcomes for our patients, we also need to think about the ‘backyard,’ too.”
 

Social Disadvantage With JIA

Dr. Soulsby’s team adopted an approach similar to that of a recent National Survey of Children’s Health analysis that used a combined scoring system to calculate cumulative social disadvantage. The researchers used income level, insurance status, and education level to capture individual factors related to disadvantage and then an area deprivation index (ADI) to capture community factors. While they were unable to use any variables specific to societal factors, they included race, which is relevant at all three levels.

The cohort included 9612 patients in the CARRA Registry from July 2015 to January 2022. They included all patients who had a JIA diagnosis with onset before age 16 and at least one visit with a complete clinical Juvenile Arthritis Disease Activity Score (JADAS) score. Most of the patients (70%) were female, with an average age at enrollment of 11 and a mean time to diagnosis of 10.6 months.

Most of the patients had oligoarthritis (35.5%) or rheumatoid factor–negative polyarthritis (29.4%), followed by enthesitis-related arthritis (10.5%) and then other forms. A total of 4% of patients had a secondary rheumatologic condition. Most of the patients were White (74.9%), with 3.9% Black, 7.6% Hispanic, and 6.5% of more than one race. ADI data were missing for 17.2% of patients.

The researchers assigned a score to each patient that could add up to a maximum of 3. They received 1 point for an annual household income below $50,000, 1 point for having public insurance or no insurance, and 1 point for their guardian having no more than a high school education. Patients with a score of 0 comprised 60.9% of the patients, while 21.3% had a score of 1, 12.9% had a score of 2, and 4.9% had a score of 3.

Just over a quarter of the patients (26.3%) were underinsured, 19.1% were low income, and 16.4% had caregivers with a high school education or less. However, income level was unknown for 24.6% of patients, and guardians’ education level was unknown for 15.7% of patients.

The primary outcomes were the odds of active disease as based on clinical JADAS (at least a 1.1 score for oligoarticular JIA and more than 2.5 for all other subtypes) and odds of functional disability based on the Childhood Health Assessment Questionnaire (CHAQ). Adjustments were made for sex, race/ethnicity, age at enrollment, time to diagnosis, ADI, JIA category, presence of secondary rheumatologic disease, and medication (use of a conventional synthetic disease-modifying antirheumatic drug [DMARD], biologic DMARD, or small molecule drug).

Nearly half (48%) of patients had active disease during follow-up, with an average clinical JADAS score of 4 from the whole cohort. Compared with children with a cumulative disadvantage score of 0, each additional point on the clinical JADAS resulted in significantly increased odds of active disease. Those with the highest score of 3 were twice as likely to have active disease (adjusted odds ratio [aOR], 2.05; P < .001) as those with a score of 0, but those with a score of 1 (aOR, 1.36; P < .001) or 2 (aOR, 1.86; P < .001) were also more likely to have active disease. Other significant independent predictors of active arthritis included being of Black race (aOR, 1.55) or more than one race (aOR, 1.31).

Each of the scored factors also independently increased the likelihood of active disease by similar amounts: 1.69 higher odds for low household income on its own, 1.6 higher odds for public or no insurance, and 1.45 higher odds for high school education or less (all P < .001).

Similarly, odds of functional disability based on CHAQ increased significantly with each additional point. The mean CHAQ score was 0.31, and 46% of patients had functional disability during follow-up. Those with a cumulative social disadvantage score of 3 were three times as likely to have functional disability (aOR, 3.09; P < .001) as those with a score of 0. Those with a score of 1 (aOR, 1.82) or 2 (aOR, 2.81) were also more likely to have functional disability (P < .001). Again, Black individuals (aOR, 2.09) or those of mixed race (aOR, 1.78) had greater odds of functional disability (P < .001).

The independent factor most associated with increased odds of functional disability was a household income below $50,000 a year (OR, 3.03; P < .001), followed by having public or no insurance (OR, 2.57) or a caregiver with no more than a high school education (OR, 1.98). Dr. Soulsby noted that their study was limited by the missing data and may oversimplify the relationships between social determinants of health.

Overall, however, the findings revealed both the importance of social risk screening in the pediatric rheumatology clinic and the coupling of that screening with individual level support for patients, Dr. Soulsby said.

“This study did a great job of harnessing the power of the CARRA Registry,” said Dr. Ardoin, who was not involved in the research. “These findings underscore how important it is for all clinicians, including pediatric rheumatologists, to evaluate every child for social risks of poor outcomes,” she said.

One take-home message from the findings is that once pediatric rheumatologists identify social risks for poor outcomes in their patients, they can “consult with social workers and connect families with community resources in an effort to ameliorate social deprivation.”
 

Childhood Lupus and Reduced Childhood Opportunity

In a similar study looking at children with childhood-onset lupus, researchers similarly identified the way that compounding social determinants of health were linked to greater disease activity.

“We know that structural racism segregates children from historically marginalized groups into different neighborhoods with lower childhood opportunity,” Joyce C. Chang, MD, of Boston Children’s Hospital, told attendees. “When we talk about child opportunity, we’re really describing all of the resources and conditions that helped to promote healthy childhood development,” including factors related to education, physical health, the built environment, and social and economic security, she said.

Dr. Chang and her colleagues therefore assessed the relationship between a 29-indicator Child Opportunity Index for patients with childhood-onset lupus and the severity of their disease presentation and activity over time. They determined the Child Opportunity Index for different neighborhoods and assessed the amount of racial residential segregation around the three institutions involved in the study. Severity of lupus presentation was based on the need for intensive care unit admission or dialysis or a Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2K) score of 10 or higher. Disease activity over time was based on the SLEDAI-2K score.

The patient population included 553 patients with childhood-onset lupus from three institutions: Boston Children’s Hospital, Lurie Children’s Hospital of Chicago, and Children’s of Alabama in Birmingham, Alabama. Across the full population, 30% of the patients were Black and 30% were Hispanic, but the distribution of race and ethnicity varied by institution. Most of the Black patients, for example, were at Children’s of Alabama (59%), while 43% of the Hispanic patients were at Lurie. Across all the sites, 14% of the patients’ families preferred a non-English language as their first language, and just over half the patients (52%) had public insurance.

Dr. Chang did not have data yet from the Lurie and Alabama cohorts, so she presented preliminary data from the Boston Children’s cohort of 148 patients. In those results, children living in neighborhoods of low childhood opportunity had four times higher odds of presenting with severe disease than children living in neighborhoods of very high opportunity. Then the researchers factored in the location quotient that represented the magnitude of racial segregation in a residential area. In areas with high levels of Black vs White segregation, children were 2.5 times more likely to have a more severe initial disease presentation. However, there was not a significant difference in areas highly segregated between Hispanic and non-Hispanic residents.

After initial presentation, the data revealed a dose-dependent relationship between childhood opportunity and severity of disease activity based on SLEDAI-2K. After adjustment for insurance status, race, preferred language, age at disease onset, sex, major organ involvement, initial SLEDAI-2K score at presentation, and follow-up time, disease activity incrementally increased as childhood opportunity decreased (P < .001 for the trend).

The findings suggested that even in regions like Boston, where overall childhood opportunity is higher than the national average, “poor relative neighborhood opportunity is still associated with more severe lupus presentation, as well as higher lupus disease activity during follow-up,” Dr. Chang said. “Area-level conditions may drive inequitable outcomes at numerous points,” including initial access to subspecialty care and after establishing that care, she said.

Dr. Soulsby, Dr. Chang, and Dr. Ardoin reported having no disclosures. Dr. Soulsby’s research was funded by CARRA and the Arthritis Foundation, and Dr. Chang’s research was funded by CARRA.
 

A version of this article appeared on Medscape.com.

Researchers have identified three distinct subgroups of Sjögren syndrome (SS) with different prognoses. While previous efforts to stratify these patients were based on reported symptoms, this new analysis is the first to add clinical and biological manifestations into the equation.

The three distinct patient clusters are those with B-cell active disease with low symptom burden (BALS), those with high systemic disease activity (HSA), and those with low systemic disease activity and high symptom burden (LSAHS). Each group had distinct long-term outcomes, including disease evolution and lymphoma incidence.

The findings were published in The Lancet Rheumatology.
 

Derived and Validated in Separate Cohorts

Researchers led by Yann Nguyen, MD, PhD, of Bicêtre Hospital and Paris-Saclay University, Paris, France, identified distinct subgroups with data from the French Paris-Saclay cohort, a group of patients suspected of having SS who participated in a multidisciplinary diagnostic session at a French National Referral Center for Rare Systemic Autoimmune Diseases and were recruited between 1999 and 2022.

The study included only patients who met the 2002 American-European Consensus Group criteria for SS and had European Alliance of Associations for Rheumatology (EULAR) Sjögren’s Syndrome Disease Activity Index (ESSDAI) and EULAR Sjögren’s Syndrome Patient Reported Index (ESSPRI) scores at inclusion. Researchers excluded patients with other autoimmune diseases associated with SS.

Researchers identified distinct subgroups using 26 variables, including patient-reported symptoms, clinical parameters, and biological data.

Researchers then validated the subgroups using the same methodology in the Assessment of Systemic Signs and Evolution of Sjögren’s syndrome (ASSESS) cohort, a national French multicenter prospective cohort formed in 2006. They then compared changes in disease activity (measured by ESSDAI) and patient-acceptable symptom state (measured by ESSPRI) between the groups over 5 years of follow-up, as well as differences in lymphoma incidence over 15 years of follow-up.
 

Patients With High Systemic Disease, Low Symptoms Fare Worse

The study ultimately included 534 patients from the Paris-Saclay cohort and 395 patients from the ASSESS cohort. For both groups, 94% of patients were women, and the median age was between 53 and 54 years.

In the Paris-Saclay group, 205 patients were classified as BALS, 160 were HSA, and 169 were LSAHS. In the ASSESS cohort, BALS remained the largest group (186 patients), followed by HSA (158 patients). Only 51 patients in the second cohort were classified as LSAHS.

During 5 years of follow-up in the ASSESS cohort, systemic disease activity improved in the HSA cluster and worsened in the BALS cluster, while there were no significant changes in the LSAHS cluster. The BALS cluster was the only group to experience significant changes in patient-acceptable symptom states during follow-up: 49% of patients with BALS had an ESSPRI score of less than 5 at inclusion, but this percentage dipped to 36% at month 60.

The findings “highlight the fact that even in patients who present with predominantly systemic manifestations, the symptom burden is high and should not be neglected,” the authors wrote.

The three categories established in this study did not correlate well with previous symptom-based stratification of patients with SS, the authors noted, which looked at the five most common symptoms associated with the condition: Pain, fatigue, dryness, anxiety, and depression.

“Patients from the high symptom burden, dryness dominant with fatigue, and pain dominant with fatigue subgroups were present in each of our three clusters,” they wrote. “This finding is consistent with the poor correlation between patient-reported outcomes and systemic disease activity.”

Lymphoma was diagnosed in 5 of 186 patients (3%) in the BALS cluster, diagnosed after a median of 70 months of follow-up, and 6 of 158 patients (4%) in the HSA cluster, diagnosed after a median of 23 months follow-up. There were no cases of lymphoma in the LSAHS group.

“Notably, in the BALS cluster, lymphoma occurred later than in the HSA cluster, and after 5 years, systemic manifestations in this cluster tended to be similar to those in the HSA cluster at inclusion,” the authors added. “The BALS cluster could therefore represent an earlier stage of the disease and carry the risk of progressing toward a more systemic phenotype.”
 

A ‘First Step’ to Subgrouping Patients

Alan Baer, MD, director of the Jerome Greene Sjogren’s Syndrome Center at John Hopkins Medical Center in Baltimore, Maryland, who commented on the study, noted that these three subgroups did “resonate” with what clinicians see in practice. Certain patients may have lab results that are “quite striking” even though they report minimal symptoms. The reverse is also true: Patients who have a high symptom burden without signs of systemic disease activity. Whether these patients should be managed differently “remains the key question,” he said.

“The hope is that when you have a group of patients that’s relatively homogenous in terms of their clinical features, that also translates to similarities into the underlying pathogenesis that can then lead to treatments that are targeted to specific subgroups of patients,” he added.

Another approach could be looking directly at molecular alterations across patients with SS and seeing how they correlate to clinical features, Dr. Baer noted.

This study “is a first step” in figuring out how to best define SS subgroups, he said, adding that “there’s more work to be done.”

This research was funded by the Fondation pour la Recherche Medicale, French Ministry of Health, French Society of Rheumatology, Innovative Medicines Initiative 2 Joint Undertaking, Medical Research Council UK, and Foundation for Research in Rheumatology. The study authors disclosed financial relationships with various pharmaceutical companies. Dr. Baer had no relevant disclosures.

A version of this article appeared on Medscape.com .

Researchers have identified three distinct subgroups of Sjögren syndrome (SS) with different prognoses. While previous efforts to stratify these patients were based on reported symptoms, this new analysis is the first to add clinical and biological manifestations into the equation.

The three distinct patient clusters are those with B-cell active disease with low symptom burden (BALS), those with high systemic disease activity (HSA), and those with low systemic disease activity and high symptom burden (LSAHS). Each group had distinct long-term outcomes, including disease evolution and lymphoma incidence.

The findings were published in The Lancet Rheumatology.
 

Derived and Validated in Separate Cohorts

Researchers led by Yann Nguyen, MD, PhD, of Bicêtre Hospital and Paris-Saclay University, Paris, France, identified distinct subgroups with data from the French Paris-Saclay cohort, a group of patients suspected of having SS who participated in a multidisciplinary diagnostic session at a French National Referral Center for Rare Systemic Autoimmune Diseases and were recruited between 1999 and 2022.

The study included only patients who met the 2002 American-European Consensus Group criteria for SS and had European Alliance of Associations for Rheumatology (EULAR) Sjögren’s Syndrome Disease Activity Index (ESSDAI) and EULAR Sjögren’s Syndrome Patient Reported Index (ESSPRI) scores at inclusion. Researchers excluded patients with other autoimmune diseases associated with SS.

Researchers identified distinct subgroups using 26 variables, including patient-reported symptoms, clinical parameters, and biological data.

Researchers then validated the subgroups using the same methodology in the Assessment of Systemic Signs and Evolution of Sjögren’s syndrome (ASSESS) cohort, a national French multicenter prospective cohort formed in 2006. They then compared changes in disease activity (measured by ESSDAI) and patient-acceptable symptom state (measured by ESSPRI) between the groups over 5 years of follow-up, as well as differences in lymphoma incidence over 15 years of follow-up.
 

Patients With High Systemic Disease, Low Symptoms Fare Worse

The study ultimately included 534 patients from the Paris-Saclay cohort and 395 patients from the ASSESS cohort. For both groups, 94% of patients were women, and the median age was between 53 and 54 years.

In the Paris-Saclay group, 205 patients were classified as BALS, 160 were HSA, and 169 were LSAHS. In the ASSESS cohort, BALS remained the largest group (186 patients), followed by HSA (158 patients). Only 51 patients in the second cohort were classified as LSAHS.

During 5 years of follow-up in the ASSESS cohort, systemic disease activity improved in the HSA cluster and worsened in the BALS cluster, while there were no significant changes in the LSAHS cluster. The BALS cluster was the only group to experience significant changes in patient-acceptable symptom states during follow-up: 49% of patients with BALS had an ESSPRI score of less than 5 at inclusion, but this percentage dipped to 36% at month 60.

The findings “highlight the fact that even in patients who present with predominantly systemic manifestations, the symptom burden is high and should not be neglected,” the authors wrote.

The three categories established in this study did not correlate well with previous symptom-based stratification of patients with SS, the authors noted, which looked at the five most common symptoms associated with the condition: Pain, fatigue, dryness, anxiety, and depression.

“Patients from the high symptom burden, dryness dominant with fatigue, and pain dominant with fatigue subgroups were present in each of our three clusters,” they wrote. “This finding is consistent with the poor correlation between patient-reported outcomes and systemic disease activity.”

Lymphoma was diagnosed in 5 of 186 patients (3%) in the BALS cluster, diagnosed after a median of 70 months of follow-up, and 6 of 158 patients (4%) in the HSA cluster, diagnosed after a median of 23 months follow-up. There were no cases of lymphoma in the LSAHS group.

“Notably, in the BALS cluster, lymphoma occurred later than in the HSA cluster, and after 5 years, systemic manifestations in this cluster tended to be similar to those in the HSA cluster at inclusion,” the authors added. “The BALS cluster could therefore represent an earlier stage of the disease and carry the risk of progressing toward a more systemic phenotype.”
 

A ‘First Step’ to Subgrouping Patients

Alan Baer, MD, director of the Jerome Greene Sjogren’s Syndrome Center at John Hopkins Medical Center in Baltimore, Maryland, who commented on the study, noted that these three subgroups did “resonate” with what clinicians see in practice. Certain patients may have lab results that are “quite striking” even though they report minimal symptoms. The reverse is also true: Patients who have a high symptom burden without signs of systemic disease activity. Whether these patients should be managed differently “remains the key question,” he said.

“The hope is that when you have a group of patients that’s relatively homogenous in terms of their clinical features, that also translates to similarities into the underlying pathogenesis that can then lead to treatments that are targeted to specific subgroups of patients,” he added.

Another approach could be looking directly at molecular alterations across patients with SS and seeing how they correlate to clinical features, Dr. Baer noted.

This study “is a first step” in figuring out how to best define SS subgroups, he said, adding that “there’s more work to be done.”

This research was funded by the Fondation pour la Recherche Medicale, French Ministry of Health, French Society of Rheumatology, Innovative Medicines Initiative 2 Joint Undertaking, Medical Research Council UK, and Foundation for Research in Rheumatology. The study authors disclosed financial relationships with various pharmaceutical companies. Dr. Baer had no relevant disclosures.

A version of this article appeared on Medscape.com .

Researchers have identified three distinct subgroups of Sjögren syndrome (SS) with different prognoses. While previous efforts to stratify these patients were based on reported symptoms, this new analysis is the first to add clinical and biological manifestations into the equation.

The three distinct patient clusters are those with B-cell active disease with low symptom burden (BALS), those with high systemic disease activity (HSA), and those with low systemic disease activity and high symptom burden (LSAHS). Each group had distinct long-term outcomes, including disease evolution and lymphoma incidence.

The findings were published in The Lancet Rheumatology.
 

Derived and Validated in Separate Cohorts

Researchers led by Yann Nguyen, MD, PhD, of Bicêtre Hospital and Paris-Saclay University, Paris, France, identified distinct subgroups with data from the French Paris-Saclay cohort, a group of patients suspected of having SS who participated in a multidisciplinary diagnostic session at a French National Referral Center for Rare Systemic Autoimmune Diseases and were recruited between 1999 and 2022.

The study included only patients who met the 2002 American-European Consensus Group criteria for SS and had European Alliance of Associations for Rheumatology (EULAR) Sjögren’s Syndrome Disease Activity Index (ESSDAI) and EULAR Sjögren’s Syndrome Patient Reported Index (ESSPRI) scores at inclusion. Researchers excluded patients with other autoimmune diseases associated with SS.

Researchers identified distinct subgroups using 26 variables, including patient-reported symptoms, clinical parameters, and biological data.

Researchers then validated the subgroups using the same methodology in the Assessment of Systemic Signs and Evolution of Sjögren’s syndrome (ASSESS) cohort, a national French multicenter prospective cohort formed in 2006. They then compared changes in disease activity (measured by ESSDAI) and patient-acceptable symptom state (measured by ESSPRI) between the groups over 5 years of follow-up, as well as differences in lymphoma incidence over 15 years of follow-up.
 

Patients With High Systemic Disease, Low Symptoms Fare Worse

The study ultimately included 534 patients from the Paris-Saclay cohort and 395 patients from the ASSESS cohort. For both groups, 94% of patients were women, and the median age was between 53 and 54 years.

In the Paris-Saclay group, 205 patients were classified as BALS, 160 were HSA, and 169 were LSAHS. In the ASSESS cohort, BALS remained the largest group (186 patients), followed by HSA (158 patients). Only 51 patients in the second cohort were classified as LSAHS.

During 5 years of follow-up in the ASSESS cohort, systemic disease activity improved in the HSA cluster and worsened in the BALS cluster, while there were no significant changes in the LSAHS cluster. The BALS cluster was the only group to experience significant changes in patient-acceptable symptom states during follow-up: 49% of patients with BALS had an ESSPRI score of less than 5 at inclusion, but this percentage dipped to 36% at month 60.

The findings “highlight the fact that even in patients who present with predominantly systemic manifestations, the symptom burden is high and should not be neglected,” the authors wrote.

The three categories established in this study did not correlate well with previous symptom-based stratification of patients with SS, the authors noted, which looked at the five most common symptoms associated with the condition: Pain, fatigue, dryness, anxiety, and depression.

“Patients from the high symptom burden, dryness dominant with fatigue, and pain dominant with fatigue subgroups were present in each of our three clusters,” they wrote. “This finding is consistent with the poor correlation between patient-reported outcomes and systemic disease activity.”

Lymphoma was diagnosed in 5 of 186 patients (3%) in the BALS cluster, diagnosed after a median of 70 months of follow-up, and 6 of 158 patients (4%) in the HSA cluster, diagnosed after a median of 23 months follow-up. There were no cases of lymphoma in the LSAHS group.

“Notably, in the BALS cluster, lymphoma occurred later than in the HSA cluster, and after 5 years, systemic manifestations in this cluster tended to be similar to those in the HSA cluster at inclusion,” the authors added. “The BALS cluster could therefore represent an earlier stage of the disease and carry the risk of progressing toward a more systemic phenotype.”
 

A ‘First Step’ to Subgrouping Patients

Alan Baer, MD, director of the Jerome Greene Sjogren’s Syndrome Center at John Hopkins Medical Center in Baltimore, Maryland, who commented on the study, noted that these three subgroups did “resonate” with what clinicians see in practice. Certain patients may have lab results that are “quite striking” even though they report minimal symptoms. The reverse is also true: Patients who have a high symptom burden without signs of systemic disease activity. Whether these patients should be managed differently “remains the key question,” he said.

“The hope is that when you have a group of patients that’s relatively homogenous in terms of their clinical features, that also translates to similarities into the underlying pathogenesis that can then lead to treatments that are targeted to specific subgroups of patients,” he added.

Another approach could be looking directly at molecular alterations across patients with SS and seeing how they correlate to clinical features, Dr. Baer noted.

This study “is a first step” in figuring out how to best define SS subgroups, he said, adding that “there’s more work to be done.”

This research was funded by the Fondation pour la Recherche Medicale, French Ministry of Health, French Society of Rheumatology, Innovative Medicines Initiative 2 Joint Undertaking, Medical Research Council UK, and Foundation for Research in Rheumatology. The study authors disclosed financial relationships with various pharmaceutical companies. Dr. Baer had no relevant disclosures.

A version of this article appeared on Medscape.com .