Multiple Sclerosis Hub

SAN DIEGO—Patients with relapsing-remitting multiple sclerosis (MS) who received high doses of the novel human endogenous retrovirus-W antagonist GNbAC1 in a phase II trial had evidence of remyelination at week 24, according to research described at the ACTRIMS 2018 Forum. The treatment did not meet the primary end point of reduction in the number of active lesions seen on MRI, however.

GNbAC1 is a monoclonal antibody that targets and blocks the envelope protein pHER-W ENV, a potent agonist of Toll-like receptor 4 (TLR4), said study author Robert Glanzman, MD. It thereby inhibits TLR4-mediated pathogenicity, which includes activation of macrophages and microglia into proinflammatory phenotypes and direct inhibition of remyelination.

—Doug Brunk

SAN DIEGO—Patients with relapsing-remitting multiple sclerosis (MS) who received high doses of the novel human endogenous retrovirus-W antagonist GNbAC1 in a phase II trial had evidence of remyelination at week 24, according to research described at the ACTRIMS 2018 Forum. The treatment did not meet the primary end point of reduction in the number of active lesions seen on MRI, however.

GNbAC1 is a monoclonal antibody that targets and blocks the envelope protein pHER-W ENV, a potent agonist of Toll-like receptor 4 (TLR4), said study author Robert Glanzman, MD. It thereby inhibits TLR4-mediated pathogenicity, which includes activation of macrophages and microglia into proinflammatory phenotypes and direct inhibition of remyelination.

—Doug Brunk

SAN DIEGO—Patients with relapsing-remitting multiple sclerosis (MS) who received high doses of the novel human endogenous retrovirus-W antagonist GNbAC1 in a phase II trial had evidence of remyelination at week 24, according to research described at the ACTRIMS 2018 Forum. The treatment did not meet the primary end point of reduction in the number of active lesions seen on MRI, however.

GNbAC1 is a monoclonal antibody that targets and blocks the envelope protein pHER-W ENV, a potent agonist of Toll-like receptor 4 (TLR4), said study author Robert Glanzman, MD. It thereby inhibits TLR4-mediated pathogenicity, which includes activation of macrophages and microglia into proinflammatory phenotypes and direct inhibition of remyelination.

—Doug Brunk

SAN DIEGO—The monoclonal antibody alemtuzumab can be an effective treatment for people living with multiple sclerosis (MS), but the agent is also associated with an increased risk for developing other autoimmune diseases, leaving clinicians with a conundrum.

Alemtuzumab is an efficacious treatment in MS that can slow the rate of brain atrophy over the long term, said Alasdair Coles, MD, Professor of Neuroimmunology at the University of Cambridge, United Kingdom, at ACTRIMS 2018 Forum. “But one or two years after each cycle of alemtuzumab, patients are at high risk of autoimmune diseases. This is the not-too-worrying thyroid disease, but there are some troubling and potentially serious complications at lower frequency.”

Considering Proposed Mechanisms

Dr. Coles and other researchers are investigating the cellular mechanism underlying the paradoxical autoimmunity associated with alemtuzumab. Some have suggested that faulty immune B cells could be the culprit, but “there is no difference in B cell reconstitution between those who do and do not get autoimmunity,” said Dr. Coles. “So, we do not think that autoimmunity after alemtuzumab is primarily a B cell problem.” Other investigators have suggested that the mechanism is the depletion of a key immune regulatory cell associated with alemtuzumab. One such example is depletion in T cells as part of an autoimmune cascade that involve CD52-high expressing cells and sialic acid-binding immunoglobulin-like lectin 10. “We do not believe this,” said Dr. Coles. “We cannot replicate the finding of reduced CD52 high cells in type 1 diabetes or MS, nor the binding of SIGLEC-10 to CD52.”

Along with his colleague Joanne Jones, MD, PhD, also at the University of Cambridge, Dr. Coles and his team instead propose that autoimmunity after alemtuzumab therapy is associated with a homeostatic proliferation of T cells in the context of a defective thymus. “We see thymic function reduced after alemtuzumab for a few months. We do not know if alemtuzumab is having a direct impact on the thymus or if it is an indirect effect through a cytokine storm at the time of administering alemtuzumab.”

In addition, in contrast with B cells, both CD4-positive and CD8-positive T cells are clonally restricted after alemtuzumab treatment, said Dr. Coles. “These are the only changes that distinguish patients who do and do not develop autoimmunity,” he said. “Those who develop autoimmunity have reduced clonality and impaired thymic function, compared with those who do not.”

The theory is that the reconstitution of T cells after alemtuzumab comes preferentially from expansion of peripheral T cells, rather than naïve T cells from the thymus, which leads to a higher representation of autoreactive T cells and thus leads to B-cell- and antibody-mediated autoimmunity.

The Bigger Picture

The autoimmune phenomenon is not unique to alemtuzumab or MS. “This turns out to be one of a family of clinical situations where the reconstitution of the depleted lymphocyte repertoire leads to autoimmunity,” Dr. Coles said. A similar effect was seen years ago when very lymphopenic patients with HIV were given antiviral therapy. About 10% of treated patients had this effect. Furthermore, about 10% of patients who undergo bone marrow transplant may experience similar autoimmune concerns.

“What we do think is true is that we have tapped into a classical expression of autoimmunity,” Dr. Coles said. “Alemtuzumab is a fantastic opportunity to study the mechanisms underlying lymphopenia-associated autoimmunity.”

A Tantalizing Prospect

“It is a tantalizing prospect that susceptible individuals might be identified in the future prior to treatment,” Dr. Coles said. “We looked at IL-21. We showed that after treatment, and perhaps more interestingly, before treatment with alemtuzumab, serum levels of IL-21 are greater in those who subsequently develop autoimmune disease. This [finding] suggests [that] some individuals are prone to developing autoimmune disease and could be identified potentially prior to treatment with alemtuzumab.”

More research is needed, including the development of more sensitive IL-21 assays for use in this population, Dr. Coles said. “Please do not attempt to predict the risk of autoimmunity after alemtuzumab using the current commercial assays. This is a source of some frustration for me.” A potential route of lymphocyte repertoire reconstitution after alemtuzumab is thymic reconstitution, which could lead to a more diverse immune repertoire, Dr. Coles said. “If we can direct reconstitution through the thymic reconstitution, we should be able to prevent autoimmunity.”

Dr. Coles receives honoraria for travel and speaking from Sanofi Genzyme, which markets alemtuzumab.

—Damian McNamara

SAN DIEGO—The monoclonal antibody alemtuzumab can be an effective treatment for people living with multiple sclerosis (MS), but the agent is also associated with an increased risk for developing other autoimmune diseases, leaving clinicians with a conundrum.

Alemtuzumab is an efficacious treatment in MS that can slow the rate of brain atrophy over the long term, said Alasdair Coles, MD, Professor of Neuroimmunology at the University of Cambridge, United Kingdom, at ACTRIMS 2018 Forum. “But one or two years after each cycle of alemtuzumab, patients are at high risk of autoimmune diseases. This is the not-too-worrying thyroid disease, but there are some troubling and potentially serious complications at lower frequency.”

Considering Proposed Mechanisms

Dr. Coles and other researchers are investigating the cellular mechanism underlying the paradoxical autoimmunity associated with alemtuzumab. Some have suggested that faulty immune B cells could be the culprit, but “there is no difference in B cell reconstitution between those who do and do not get autoimmunity,” said Dr. Coles. “So, we do not think that autoimmunity after alemtuzumab is primarily a B cell problem.” Other investigators have suggested that the mechanism is the depletion of a key immune regulatory cell associated with alemtuzumab. One such example is depletion in T cells as part of an autoimmune cascade that involve CD52-high expressing cells and sialic acid-binding immunoglobulin-like lectin 10. “We do not believe this,” said Dr. Coles. “We cannot replicate the finding of reduced CD52 high cells in type 1 diabetes or MS, nor the binding of SIGLEC-10 to CD52.”

Along with his colleague Joanne Jones, MD, PhD, also at the University of Cambridge, Dr. Coles and his team instead propose that autoimmunity after alemtuzumab therapy is associated with a homeostatic proliferation of T cells in the context of a defective thymus. “We see thymic function reduced after alemtuzumab for a few months. We do not know if alemtuzumab is having a direct impact on the thymus or if it is an indirect effect through a cytokine storm at the time of administering alemtuzumab.”

In addition, in contrast with B cells, both CD4-positive and CD8-positive T cells are clonally restricted after alemtuzumab treatment, said Dr. Coles. “These are the only changes that distinguish patients who do and do not develop autoimmunity,” he said. “Those who develop autoimmunity have reduced clonality and impaired thymic function, compared with those who do not.”

The theory is that the reconstitution of T cells after alemtuzumab comes preferentially from expansion of peripheral T cells, rather than naïve T cells from the thymus, which leads to a higher representation of autoreactive T cells and thus leads to B-cell- and antibody-mediated autoimmunity.

The Bigger Picture

The autoimmune phenomenon is not unique to alemtuzumab or MS. “This turns out to be one of a family of clinical situations where the reconstitution of the depleted lymphocyte repertoire leads to autoimmunity,” Dr. Coles said. A similar effect was seen years ago when very lymphopenic patients with HIV were given antiviral therapy. About 10% of treated patients had this effect. Furthermore, about 10% of patients who undergo bone marrow transplant may experience similar autoimmune concerns.

“What we do think is true is that we have tapped into a classical expression of autoimmunity,” Dr. Coles said. “Alemtuzumab is a fantastic opportunity to study the mechanisms underlying lymphopenia-associated autoimmunity.”

A Tantalizing Prospect

“It is a tantalizing prospect that susceptible individuals might be identified in the future prior to treatment,” Dr. Coles said. “We looked at IL-21. We showed that after treatment, and perhaps more interestingly, before treatment with alemtuzumab, serum levels of IL-21 are greater in those who subsequently develop autoimmune disease. This [finding] suggests [that] some individuals are prone to developing autoimmune disease and could be identified potentially prior to treatment with alemtuzumab.”

More research is needed, including the development of more sensitive IL-21 assays for use in this population, Dr. Coles said. “Please do not attempt to predict the risk of autoimmunity after alemtuzumab using the current commercial assays. This is a source of some frustration for me.” A potential route of lymphocyte repertoire reconstitution after alemtuzumab is thymic reconstitution, which could lead to a more diverse immune repertoire, Dr. Coles said. “If we can direct reconstitution through the thymic reconstitution, we should be able to prevent autoimmunity.”

Dr. Coles receives honoraria for travel and speaking from Sanofi Genzyme, which markets alemtuzumab.

—Damian McNamara

SAN DIEGO—The monoclonal antibody alemtuzumab can be an effective treatment for people living with multiple sclerosis (MS), but the agent is also associated with an increased risk for developing other autoimmune diseases, leaving clinicians with a conundrum.

Alemtuzumab is an efficacious treatment in MS that can slow the rate of brain atrophy over the long term, said Alasdair Coles, MD, Professor of Neuroimmunology at the University of Cambridge, United Kingdom, at ACTRIMS 2018 Forum. “But one or two years after each cycle of alemtuzumab, patients are at high risk of autoimmune diseases. This is the not-too-worrying thyroid disease, but there are some troubling and potentially serious complications at lower frequency.”

Considering Proposed Mechanisms

Dr. Coles and other researchers are investigating the cellular mechanism underlying the paradoxical autoimmunity associated with alemtuzumab. Some have suggested that faulty immune B cells could be the culprit, but “there is no difference in B cell reconstitution between those who do and do not get autoimmunity,” said Dr. Coles. “So, we do not think that autoimmunity after alemtuzumab is primarily a B cell problem.” Other investigators have suggested that the mechanism is the depletion of a key immune regulatory cell associated with alemtuzumab. One such example is depletion in T cells as part of an autoimmune cascade that involve CD52-high expressing cells and sialic acid-binding immunoglobulin-like lectin 10. “We do not believe this,” said Dr. Coles. “We cannot replicate the finding of reduced CD52 high cells in type 1 diabetes or MS, nor the binding of SIGLEC-10 to CD52.”

Along with his colleague Joanne Jones, MD, PhD, also at the University of Cambridge, Dr. Coles and his team instead propose that autoimmunity after alemtuzumab therapy is associated with a homeostatic proliferation of T cells in the context of a defective thymus. “We see thymic function reduced after alemtuzumab for a few months. We do not know if alemtuzumab is having a direct impact on the thymus or if it is an indirect effect through a cytokine storm at the time of administering alemtuzumab.”

In addition, in contrast with B cells, both CD4-positive and CD8-positive T cells are clonally restricted after alemtuzumab treatment, said Dr. Coles. “These are the only changes that distinguish patients who do and do not develop autoimmunity,” he said. “Those who develop autoimmunity have reduced clonality and impaired thymic function, compared with those who do not.”

The theory is that the reconstitution of T cells after alemtuzumab comes preferentially from expansion of peripheral T cells, rather than naïve T cells from the thymus, which leads to a higher representation of autoreactive T cells and thus leads to B-cell- and antibody-mediated autoimmunity.

The Bigger Picture

The autoimmune phenomenon is not unique to alemtuzumab or MS. “This turns out to be one of a family of clinical situations where the reconstitution of the depleted lymphocyte repertoire leads to autoimmunity,” Dr. Coles said. A similar effect was seen years ago when very lymphopenic patients with HIV were given antiviral therapy. About 10% of treated patients had this effect. Furthermore, about 10% of patients who undergo bone marrow transplant may experience similar autoimmune concerns.

“What we do think is true is that we have tapped into a classical expression of autoimmunity,” Dr. Coles said. “Alemtuzumab is a fantastic opportunity to study the mechanisms underlying lymphopenia-associated autoimmunity.”

A Tantalizing Prospect

“It is a tantalizing prospect that susceptible individuals might be identified in the future prior to treatment,” Dr. Coles said. “We looked at IL-21. We showed that after treatment, and perhaps more interestingly, before treatment with alemtuzumab, serum levels of IL-21 are greater in those who subsequently develop autoimmune disease. This [finding] suggests [that] some individuals are prone to developing autoimmune disease and could be identified potentially prior to treatment with alemtuzumab.”

More research is needed, including the development of more sensitive IL-21 assays for use in this population, Dr. Coles said. “Please do not attempt to predict the risk of autoimmunity after alemtuzumab using the current commercial assays. This is a source of some frustration for me.” A potential route of lymphocyte repertoire reconstitution after alemtuzumab is thymic reconstitution, which could lead to a more diverse immune repertoire, Dr. Coles said. “If we can direct reconstitution through the thymic reconstitution, we should be able to prevent autoimmunity.”

Dr. Coles receives honoraria for travel and speaking from Sanofi Genzyme, which markets alemtuzumab.

—Damian McNamara

SAN DIEGO—Patients with multiple sclerosis (MS) who are treated by primary care physicians are significantly less likely to receive disease-modifying therapies (DMTs) than patients treated by neurologists, even though they have more symptoms, according to a study reported at the ACTRIMS 2018 Forum.

Approximately 85% of patients treated by neurologists at MS centers receive DMTs, compared with 51% of those treated at primary care offices.

In addition, patients treated at primary care practices have several kinds of symptoms. “This [finding] suggests there is a critical need for neurologists, especially MS specialists, to reach out and collaborate with these primary care providers and provide education about how to manage MS and improve both the treatment and the outcomes,” said lead study author Michael T. Halpern, MD, PhD, Associate Professor of Public Health at Temple University in Philadelphia.

—Randy Dotinga

SAN DIEGO—Patients with multiple sclerosis (MS) who are treated by primary care physicians are significantly less likely to receive disease-modifying therapies (DMTs) than patients treated by neurologists, even though they have more symptoms, according to a study reported at the ACTRIMS 2018 Forum.

Approximately 85% of patients treated by neurologists at MS centers receive DMTs, compared with 51% of those treated at primary care offices.

In addition, patients treated at primary care practices have several kinds of symptoms. “This [finding] suggests there is a critical need for neurologists, especially MS specialists, to reach out and collaborate with these primary care providers and provide education about how to manage MS and improve both the treatment and the outcomes,” said lead study author Michael T. Halpern, MD, PhD, Associate Professor of Public Health at Temple University in Philadelphia.

—Randy Dotinga

SAN DIEGO—Patients with multiple sclerosis (MS) who are treated by primary care physicians are significantly less likely to receive disease-modifying therapies (DMTs) than patients treated by neurologists, even though they have more symptoms, according to a study reported at the ACTRIMS 2018 Forum.

Approximately 85% of patients treated by neurologists at MS centers receive DMTs, compared with 51% of those treated at primary care offices.

In addition, patients treated at primary care practices have several kinds of symptoms. “This [finding] suggests there is a critical need for neurologists, especially MS specialists, to reach out and collaborate with these primary care providers and provide education about how to manage MS and improve both the treatment and the outcomes,” said lead study author Michael T. Halpern, MD, PhD, Associate Professor of Public Health at Temple University in Philadelphia.

—Randy Dotinga

SAN DIEGO—Among patients with multiple sclerosis (MS) who are positive for the John Cunningham virus (JCV), extended-interval dosing of natalizumab is associated with a clinically and statistically significant reduction in the risk of progressive multifocal leukoencephalopathy (PML), compared with standard-interval dosing, according to a study presented at the ACTRIMS 2018 Forum.

The observed risk reduction may change clinical practice and save lives, said lead study author Lana Zhovtis Ryerson, MD, Assistant Professor of Neurology at the New York University School of Medicine.

Real-World Safety Data

While natalizumab may be an effective medication for relapsing MS at the approved dose of 300 mg IV every four weeks, the treatment is associated with the risk of PML, a rare but potentially deadly brain infection. A prior retrospective study by the researchers suggested that extending the dosing interval to as long as eight weeks does not negatively affect the medication’s efficacy. The impact of extended-interval dosing on PML risk has been inconclusive, however.

To assess whether extended-interval dosing (ie, an average dosing interval of between five and 12 weeks) reduces PML risk, compared with standard-interval dosing (ie, an average dosing interval of between three and five weeks), Dr. Zhovtis Ryerson and colleagues analyzed data through June 1, 2017, from the TOUCH Prescribing Program, a mandatory US risk evaluation and mitigation program for natalizumab. The investigators included only patients who were anti–JCV antibody positive in their analyses. They excluded patients with any gap in treatment of more than 12 weeks.

The investigators analyzed the data using three definitions of standard-interval dosing and extended-interval dosing. Their first analysis defined extended-interval dosing as 15 or fewer infusions in the last 18 months, whereas standard-interval dosing was defined as more than 15 infusions in the last 18 months. The second analysis defined extended-interval dosing as at least six months of consecutive extended-interval infusions at any time in a patient’s dosing history. The third analysis defined extended-interval dosing as an average of 10 or fewer infusions per year during a patient’s total follow-up time, whereas standard-interval dosing was defined as an average of more than 10 infusions per year during a patient’s total follow-up time.

Using the life-table method, the estimated risk of PML per 1,000 patients at the highest number of doses (ie, between 61 doses and 72 doses) was 1.70 in the extended-interval dosing group, versus 4.46 in the standard-interval dosing group, for the first analysis. In the second analysis, the estimated risk was 2.04 in the extended-interval dosing group, versus 4.74 in the standard-interval dosing group.In the first analysis, Kaplan-Meier estimates found “a clinically meaningful and statistically significant divergence of cumulative risk of PML, with a 94% risk reduction” with extended-interval dosing, compared with standard-interval dosing, Dr. Zhovtis Ryerson said. There were three PML cases in the extended-interval dosing group (n = 1,988), versus 89 PML cases in the standard-interval dosing group (n = 13,132). In the second analysis, extended-interval dosing was associated with an 88% risk reduction, with 12 PML cases in the extended-interval dosing cohort (n = 3,331), versus 71 PML cases in the standard-interval dosing group (n = 15,424). In the third analysis, there were no PML cases in the extended-interval dosing group (n = 815), compared with 96 cases in the standard-interval dosing group (n = 23,168).

Parsing the TOUCH Registry

With more than 90,000 patients enrolled as of June 1, 2017, the TOUCH Prescribing Program provided the largest available data source regarding PML risk in patients on extended-interval dosing, the researchers said.

“The TOUCH database provides us with real-world data, which are complicated,” Dr. Zhovtis Ryerson said. “Accidental extended-dose infusions happen. Vacations, sicknesses, and dosing gaps due to pregnancy or other reasons occur. But these are not the patients that we are trying to parse out. We are more interested in patients with consecutive and prolonged treatment on extended dose.”

The complicated nature of the data was part of the rationale for developing the three definitions that enabled the investigators to look at extended-interval dosing in multiple ways. “For the primary definition, we utilized an approach that we see in our own clinics—where patients start out on standard dose and are slowly transitioned to extended dose after some months of treatment,” said Dr. Zhovtis Ryerson.

The methodology may have led to selection biases, however. “The patients in the extended-dosing cohorts spent more time on natalizumab—therefore potentially increasing their risk for PML,” she said. “On the other hand, these patients spent time on standard dose, a median of two years, without getting PML before moving on to the extended-dose schedule,” which could have led to fewer PML cases in the extended-interval dosing cohorts. Across all three definitions, the average dosing interval was between 35 days and 43 days for extended-interval dosing, compared with between 30 days and 31 days for standard-interval dosing.

The TOUCH registry does not include efficacy data, and prospective studies are needed to determine whether natalizumab’s efficacy is maintained with extended-interval dosing, the researchers said.

—Fred Balzac

Suggested Reading

Bomprezzi R, Pawate S. Extended interval dosing of natalizumab: a two-center, 7-year experience. Ther Adv Neurol Disord. 2014;7(5):227-231.

Fine AJ, Sorbello A, Kortepeter C, et al. Progressive multifocal leukoencephalopathy after natalizumab discontinuation. Ann Neurol. 2014;75(1):108-115.

Ho PR, Koendgen H, Campbell N, et al. Risk of natalizumab-associated progressive multifocal leukoencephalopathy in patients with multiple sclerosis: a retrospective analysis of data from four clinical studies. Lancet Neurol. 2017;16(11):925-933.

Zhovtis Ryerson L, Frohman TC, Foley J, et al. Extended interval dosing of natalizumab in multiple sclerosis. J Neurol Neurosurg Psychiatry. 2016;87(8):885-889.

SAN DIEGO—Among patients with multiple sclerosis (MS) who are positive for the John Cunningham virus (JCV), extended-interval dosing of natalizumab is associated with a clinically and statistically significant reduction in the risk of progressive multifocal leukoencephalopathy (PML), compared with standard-interval dosing, according to a study presented at the ACTRIMS 2018 Forum.

The observed risk reduction may change clinical practice and save lives, said lead study author Lana Zhovtis Ryerson, MD, Assistant Professor of Neurology at the New York University School of Medicine.

Real-World Safety Data

While natalizumab may be an effective medication for relapsing MS at the approved dose of 300 mg IV every four weeks, the treatment is associated with the risk of PML, a rare but potentially deadly brain infection. A prior retrospective study by the researchers suggested that extending the dosing interval to as long as eight weeks does not negatively affect the medication’s efficacy. The impact of extended-interval dosing on PML risk has been inconclusive, however.

To assess whether extended-interval dosing (ie, an average dosing interval of between five and 12 weeks) reduces PML risk, compared with standard-interval dosing (ie, an average dosing interval of between three and five weeks), Dr. Zhovtis Ryerson and colleagues analyzed data through June 1, 2017, from the TOUCH Prescribing Program, a mandatory US risk evaluation and mitigation program for natalizumab. The investigators included only patients who were anti–JCV antibody positive in their analyses. They excluded patients with any gap in treatment of more than 12 weeks.

The investigators analyzed the data using three definitions of standard-interval dosing and extended-interval dosing. Their first analysis defined extended-interval dosing as 15 or fewer infusions in the last 18 months, whereas standard-interval dosing was defined as more than 15 infusions in the last 18 months. The second analysis defined extended-interval dosing as at least six months of consecutive extended-interval infusions at any time in a patient’s dosing history. The third analysis defined extended-interval dosing as an average of 10 or fewer infusions per year during a patient’s total follow-up time, whereas standard-interval dosing was defined as an average of more than 10 infusions per year during a patient’s total follow-up time.

Using the life-table method, the estimated risk of PML per 1,000 patients at the highest number of doses (ie, between 61 doses and 72 doses) was 1.70 in the extended-interval dosing group, versus 4.46 in the standard-interval dosing group, for the first analysis. In the second analysis, the estimated risk was 2.04 in the extended-interval dosing group, versus 4.74 in the standard-interval dosing group.In the first analysis, Kaplan-Meier estimates found “a clinically meaningful and statistically significant divergence of cumulative risk of PML, with a 94% risk reduction” with extended-interval dosing, compared with standard-interval dosing, Dr. Zhovtis Ryerson said. There were three PML cases in the extended-interval dosing group (n = 1,988), versus 89 PML cases in the standard-interval dosing group (n = 13,132). In the second analysis, extended-interval dosing was associated with an 88% risk reduction, with 12 PML cases in the extended-interval dosing cohort (n = 3,331), versus 71 PML cases in the standard-interval dosing group (n = 15,424). In the third analysis, there were no PML cases in the extended-interval dosing group (n = 815), compared with 96 cases in the standard-interval dosing group (n = 23,168).

Parsing the TOUCH Registry

With more than 90,000 patients enrolled as of June 1, 2017, the TOUCH Prescribing Program provided the largest available data source regarding PML risk in patients on extended-interval dosing, the researchers said.

“The TOUCH database provides us with real-world data, which are complicated,” Dr. Zhovtis Ryerson said. “Accidental extended-dose infusions happen. Vacations, sicknesses, and dosing gaps due to pregnancy or other reasons occur. But these are not the patients that we are trying to parse out. We are more interested in patients with consecutive and prolonged treatment on extended dose.”

The complicated nature of the data was part of the rationale for developing the three definitions that enabled the investigators to look at extended-interval dosing in multiple ways. “For the primary definition, we utilized an approach that we see in our own clinics—where patients start out on standard dose and are slowly transitioned to extended dose after some months of treatment,” said Dr. Zhovtis Ryerson.

The methodology may have led to selection biases, however. “The patients in the extended-dosing cohorts spent more time on natalizumab—therefore potentially increasing their risk for PML,” she said. “On the other hand, these patients spent time on standard dose, a median of two years, without getting PML before moving on to the extended-dose schedule,” which could have led to fewer PML cases in the extended-interval dosing cohorts. Across all three definitions, the average dosing interval was between 35 days and 43 days for extended-interval dosing, compared with between 30 days and 31 days for standard-interval dosing.

The TOUCH registry does not include efficacy data, and prospective studies are needed to determine whether natalizumab’s efficacy is maintained with extended-interval dosing, the researchers said.

—Fred Balzac

Suggested Reading

Bomprezzi R, Pawate S. Extended interval dosing of natalizumab: a two-center, 7-year experience. Ther Adv Neurol Disord. 2014;7(5):227-231.

Fine AJ, Sorbello A, Kortepeter C, et al. Progressive multifocal leukoencephalopathy after natalizumab discontinuation. Ann Neurol. 2014;75(1):108-115.

Ho PR, Koendgen H, Campbell N, et al. Risk of natalizumab-associated progressive multifocal leukoencephalopathy in patients with multiple sclerosis: a retrospective analysis of data from four clinical studies. Lancet Neurol. 2017;16(11):925-933.

Zhovtis Ryerson L, Frohman TC, Foley J, et al. Extended interval dosing of natalizumab in multiple sclerosis. J Neurol Neurosurg Psychiatry. 2016;87(8):885-889.

SAN DIEGO—Among patients with multiple sclerosis (MS) who are positive for the John Cunningham virus (JCV), extended-interval dosing of natalizumab is associated with a clinically and statistically significant reduction in the risk of progressive multifocal leukoencephalopathy (PML), compared with standard-interval dosing, according to a study presented at the ACTRIMS 2018 Forum.

The observed risk reduction may change clinical practice and save lives, said lead study author Lana Zhovtis Ryerson, MD, Assistant Professor of Neurology at the New York University School of Medicine.

Real-World Safety Data

While natalizumab may be an effective medication for relapsing MS at the approved dose of 300 mg IV every four weeks, the treatment is associated with the risk of PML, a rare but potentially deadly brain infection. A prior retrospective study by the researchers suggested that extending the dosing interval to as long as eight weeks does not negatively affect the medication’s efficacy. The impact of extended-interval dosing on PML risk has been inconclusive, however.

To assess whether extended-interval dosing (ie, an average dosing interval of between five and 12 weeks) reduces PML risk, compared with standard-interval dosing (ie, an average dosing interval of between three and five weeks), Dr. Zhovtis Ryerson and colleagues analyzed data through June 1, 2017, from the TOUCH Prescribing Program, a mandatory US risk evaluation and mitigation program for natalizumab. The investigators included only patients who were anti–JCV antibody positive in their analyses. They excluded patients with any gap in treatment of more than 12 weeks.

The investigators analyzed the data using three definitions of standard-interval dosing and extended-interval dosing. Their first analysis defined extended-interval dosing as 15 or fewer infusions in the last 18 months, whereas standard-interval dosing was defined as more than 15 infusions in the last 18 months. The second analysis defined extended-interval dosing as at least six months of consecutive extended-interval infusions at any time in a patient’s dosing history. The third analysis defined extended-interval dosing as an average of 10 or fewer infusions per year during a patient’s total follow-up time, whereas standard-interval dosing was defined as an average of more than 10 infusions per year during a patient’s total follow-up time.

Using the life-table method, the estimated risk of PML per 1,000 patients at the highest number of doses (ie, between 61 doses and 72 doses) was 1.70 in the extended-interval dosing group, versus 4.46 in the standard-interval dosing group, for the first analysis. In the second analysis, the estimated risk was 2.04 in the extended-interval dosing group, versus 4.74 in the standard-interval dosing group.In the first analysis, Kaplan-Meier estimates found “a clinically meaningful and statistically significant divergence of cumulative risk of PML, with a 94% risk reduction” with extended-interval dosing, compared with standard-interval dosing, Dr. Zhovtis Ryerson said. There were three PML cases in the extended-interval dosing group (n = 1,988), versus 89 PML cases in the standard-interval dosing group (n = 13,132). In the second analysis, extended-interval dosing was associated with an 88% risk reduction, with 12 PML cases in the extended-interval dosing cohort (n = 3,331), versus 71 PML cases in the standard-interval dosing group (n = 15,424). In the third analysis, there were no PML cases in the extended-interval dosing group (n = 815), compared with 96 cases in the standard-interval dosing group (n = 23,168).

Parsing the TOUCH Registry

With more than 90,000 patients enrolled as of June 1, 2017, the TOUCH Prescribing Program provided the largest available data source regarding PML risk in patients on extended-interval dosing, the researchers said.

“The TOUCH database provides us with real-world data, which are complicated,” Dr. Zhovtis Ryerson said. “Accidental extended-dose infusions happen. Vacations, sicknesses, and dosing gaps due to pregnancy or other reasons occur. But these are not the patients that we are trying to parse out. We are more interested in patients with consecutive and prolonged treatment on extended dose.”

The complicated nature of the data was part of the rationale for developing the three definitions that enabled the investigators to look at extended-interval dosing in multiple ways. “For the primary definition, we utilized an approach that we see in our own clinics—where patients start out on standard dose and are slowly transitioned to extended dose after some months of treatment,” said Dr. Zhovtis Ryerson.

The methodology may have led to selection biases, however. “The patients in the extended-dosing cohorts spent more time on natalizumab—therefore potentially increasing their risk for PML,” she said. “On the other hand, these patients spent time on standard dose, a median of two years, without getting PML before moving on to the extended-dose schedule,” which could have led to fewer PML cases in the extended-interval dosing cohorts. Across all three definitions, the average dosing interval was between 35 days and 43 days for extended-interval dosing, compared with between 30 days and 31 days for standard-interval dosing.

The TOUCH registry does not include efficacy data, and prospective studies are needed to determine whether natalizumab’s efficacy is maintained with extended-interval dosing, the researchers said.

—Fred Balzac

Suggested Reading

Bomprezzi R, Pawate S. Extended interval dosing of natalizumab: a two-center, 7-year experience. Ther Adv Neurol Disord. 2014;7(5):227-231.

Fine AJ, Sorbello A, Kortepeter C, et al. Progressive multifocal leukoencephalopathy after natalizumab discontinuation. Ann Neurol. 2014;75(1):108-115.

Ho PR, Koendgen H, Campbell N, et al. Risk of natalizumab-associated progressive multifocal leukoencephalopathy in patients with multiple sclerosis: a retrospective analysis of data from four clinical studies. Lancet Neurol. 2017;16(11):925-933.

Zhovtis Ryerson L, Frohman TC, Foley J, et al. Extended interval dosing of natalizumab in multiple sclerosis. J Neurol Neurosurg Psychiatry. 2016;87(8):885-889.

SAN DIEGO—Absence of miR-219, a microRNA (miRNA), in CSF could be a biomarker of multiple sclerosis (MS), according to data presented at the ACTRIMS 2018 Forum. If confirmed, the results could provide an objective measure to improve the diagnosis of MS.

When demyelination occurs in healthy individuals, remyelination follows. In the latter process, oligodendrocyte precursor cells repopulate the demyelinated area and create new myelin. Although large numbers of these cells surround new MS lesions, the precursor cells may fail to differentiate into mature oligodendrocytes, and thus fail to remyelinate the lesions. Data suggest that miR-219 is necessary for oligodendrocyte precursor cell differentiation in mice and rats.

Brigit A. de Jong, MD, PhD, a neurologist at Radboud University Medical Center in Nijmegen, the Netherlands, and colleagues found decreased miR-219 expression in the tissue of patients with MS, compared with healthy controls. To investigate whether CSF levels of miR-219 could be a biomarker of MS, the investigators performed quantitative polymerase chain reaction on samples taken from patients with MS and controls.

An Analysis of Three Cohorts

Dr. de Jong and colleagues analyzed three independent cohorts in their study. Cohort 1 included 24 participants, Cohort 2 included 115 participants, and Cohort 3 included 112 participants. Study participants included healthy controls and patients with clinically isolated syndrome (CIS), relapsing-remitting MS, secondary progressive MS, primary progressive MS, inflammatory neurologic disease, noninflammatory neurologic disease, Alzheimer’s disease, or idiopathic intracranial hypertension. In all, 148 of the participants (59%) were women.

The absence of miR-219 in CSF was consistently associated with MS. In Cohort 1, the odds ratio for a diagnosis of progressive MS was 20.8, compared with controls, if CSF miR-219 was undetectable. In Cohort 2, the odds ratio for a diagnosis of MS or CIS was 2.6, compared with controls, if CSF miR-219 was undetectable. The odds ratio for a diagnosis of progressive MS was 3.6, compared with other neurologic disorders, if CSF miR-219 was undetectable in this cohort. In Cohort 3, the odds ratio for a diagnosis of MS was 39.7, compared with controls, if CSF miR-219 was undetectable.

Advantages of miRNAs

Detecting miRNAs in CSF is difficult because of the low levels at which they are present, said the authors. Nevertheless, miRNAs could be advantageous biomarkers because they are highly stable in body fluids, and the corresponding detection assays can be developed and multiplexed easily. Assessing the performance of miR-219 as a biomarker in situations in which MS cannot be differentiated from MS mimics will require future research, they concluded.

—Erik Greb

Suggested Reading

Agah E, Zardoui A, Saghazadeh A, et al. Osteopontin (OPN) as a CSF and blood biomarker for multiple sclerosis: A systematic review and meta-analysis. PLoS One. 2018 Jan 18;13(1):e0190252.

Bruinsma IB, van Dijk M, Bridel C, et al. Regulator of oligodendrocyte maturation, miR-219, a potential biomarker for MS. J Neuroinflammation. 2017;14(1):235.

Puz P, Steposz A, Lasek-Bal A, et al. Diagnostic methods used in searching for markers of atrophy in patients with multiple sclerosis. Neurol Res. 2018;40(2):110-116.

SAN DIEGO—Absence of miR-219, a microRNA (miRNA), in CSF could be a biomarker of multiple sclerosis (MS), according to data presented at the ACTRIMS 2018 Forum. If confirmed, the results could provide an objective measure to improve the diagnosis of MS.

When demyelination occurs in healthy individuals, remyelination follows. In the latter process, oligodendrocyte precursor cells repopulate the demyelinated area and create new myelin. Although large numbers of these cells surround new MS lesions, the precursor cells may fail to differentiate into mature oligodendrocytes, and thus fail to remyelinate the lesions. Data suggest that miR-219 is necessary for oligodendrocyte precursor cell differentiation in mice and rats.

Brigit A. de Jong, MD, PhD, a neurologist at Radboud University Medical Center in Nijmegen, the Netherlands, and colleagues found decreased miR-219 expression in the tissue of patients with MS, compared with healthy controls. To investigate whether CSF levels of miR-219 could be a biomarker of MS, the investigators performed quantitative polymerase chain reaction on samples taken from patients with MS and controls.

An Analysis of Three Cohorts

Dr. de Jong and colleagues analyzed three independent cohorts in their study. Cohort 1 included 24 participants, Cohort 2 included 115 participants, and Cohort 3 included 112 participants. Study participants included healthy controls and patients with clinically isolated syndrome (CIS), relapsing-remitting MS, secondary progressive MS, primary progressive MS, inflammatory neurologic disease, noninflammatory neurologic disease, Alzheimer’s disease, or idiopathic intracranial hypertension. In all, 148 of the participants (59%) were women.

The absence of miR-219 in CSF was consistently associated with MS. In Cohort 1, the odds ratio for a diagnosis of progressive MS was 20.8, compared with controls, if CSF miR-219 was undetectable. In Cohort 2, the odds ratio for a diagnosis of MS or CIS was 2.6, compared with controls, if CSF miR-219 was undetectable. The odds ratio for a diagnosis of progressive MS was 3.6, compared with other neurologic disorders, if CSF miR-219 was undetectable in this cohort. In Cohort 3, the odds ratio for a diagnosis of MS was 39.7, compared with controls, if CSF miR-219 was undetectable.

Advantages of miRNAs

Detecting miRNAs in CSF is difficult because of the low levels at which they are present, said the authors. Nevertheless, miRNAs could be advantageous biomarkers because they are highly stable in body fluids, and the corresponding detection assays can be developed and multiplexed easily. Assessing the performance of miR-219 as a biomarker in situations in which MS cannot be differentiated from MS mimics will require future research, they concluded.

—Erik Greb

Suggested Reading

Agah E, Zardoui A, Saghazadeh A, et al. Osteopontin (OPN) as a CSF and blood biomarker for multiple sclerosis: A systematic review and meta-analysis. PLoS One. 2018 Jan 18;13(1):e0190252.

Bruinsma IB, van Dijk M, Bridel C, et al. Regulator of oligodendrocyte maturation, miR-219, a potential biomarker for MS. J Neuroinflammation. 2017;14(1):235.

Puz P, Steposz A, Lasek-Bal A, et al. Diagnostic methods used in searching for markers of atrophy in patients with multiple sclerosis. Neurol Res. 2018;40(2):110-116.

SAN DIEGO—Absence of miR-219, a microRNA (miRNA), in CSF could be a biomarker of multiple sclerosis (MS), according to data presented at the ACTRIMS 2018 Forum. If confirmed, the results could provide an objective measure to improve the diagnosis of MS.

When demyelination occurs in healthy individuals, remyelination follows. In the latter process, oligodendrocyte precursor cells repopulate the demyelinated area and create new myelin. Although large numbers of these cells surround new MS lesions, the precursor cells may fail to differentiate into mature oligodendrocytes, and thus fail to remyelinate the lesions. Data suggest that miR-219 is necessary for oligodendrocyte precursor cell differentiation in mice and rats.

Brigit A. de Jong, MD, PhD, a neurologist at Radboud University Medical Center in Nijmegen, the Netherlands, and colleagues found decreased miR-219 expression in the tissue of patients with MS, compared with healthy controls. To investigate whether CSF levels of miR-219 could be a biomarker of MS, the investigators performed quantitative polymerase chain reaction on samples taken from patients with MS and controls.

An Analysis of Three Cohorts

Dr. de Jong and colleagues analyzed three independent cohorts in their study. Cohort 1 included 24 participants, Cohort 2 included 115 participants, and Cohort 3 included 112 participants. Study participants included healthy controls and patients with clinically isolated syndrome (CIS), relapsing-remitting MS, secondary progressive MS, primary progressive MS, inflammatory neurologic disease, noninflammatory neurologic disease, Alzheimer’s disease, or idiopathic intracranial hypertension. In all, 148 of the participants (59%) were women.

The absence of miR-219 in CSF was consistently associated with MS. In Cohort 1, the odds ratio for a diagnosis of progressive MS was 20.8, compared with controls, if CSF miR-219 was undetectable. In Cohort 2, the odds ratio for a diagnosis of MS or CIS was 2.6, compared with controls, if CSF miR-219 was undetectable. The odds ratio for a diagnosis of progressive MS was 3.6, compared with other neurologic disorders, if CSF miR-219 was undetectable in this cohort. In Cohort 3, the odds ratio for a diagnosis of MS was 39.7, compared with controls, if CSF miR-219 was undetectable.

Advantages of miRNAs

Detecting miRNAs in CSF is difficult because of the low levels at which they are present, said the authors. Nevertheless, miRNAs could be advantageous biomarkers because they are highly stable in body fluids, and the corresponding detection assays can be developed and multiplexed easily. Assessing the performance of miR-219 as a biomarker in situations in which MS cannot be differentiated from MS mimics will require future research, they concluded.

—Erik Greb

Suggested Reading

Agah E, Zardoui A, Saghazadeh A, et al. Osteopontin (OPN) as a CSF and blood biomarker for multiple sclerosis: A systematic review and meta-analysis. PLoS One. 2018 Jan 18;13(1):e0190252.

Bruinsma IB, van Dijk M, Bridel C, et al. Regulator of oligodendrocyte maturation, miR-219, a potential biomarker for MS. J Neuroinflammation. 2017;14(1):235.

Puz P, Steposz A, Lasek-Bal A, et al. Diagnostic methods used in searching for markers of atrophy in patients with multiple sclerosis. Neurol Res. 2018;40(2):110-116.

SAN DIEGO—A novel therapy designed to promote the maturation and activation of myelin-producing oligodendrocytes is moving to phase II clinical trials based on evidence of safety and efficacy in animal models and humans. The therapy, a suspension of clean-surfaced gold nanocrystals, may remyelinate multiple sclerosis (MS) lesions, according to research presented at the ACTRIMS 2018 Forum.

This agent, known as CNM-Au8, has been associated with improved behavioral function in animal models of MS, according to Michael Hotchkin, Head of Strategic Oper­ations at Clene Nanomedicine in Salt Lake City. Clene Nanomedicine is developing CNM-Au8. Although the mechanism of action is “multifactorial,” the benefit has been linked to bioenergetic support for the differentiation and maturation of oligodendrocyte precursor cells, said Mr. Hotchkin.

In one behavioral study of fine motor kinetics in an experimental model of MS, mice treated with CNM-Au8 “were effectively indistinguishable” from animals with no demyelination, he said.

Treatment Improved Two Models of Demyelination

Following in vitro studies that suggested that CNM-Au8 can promote the differentiation of oligodendrocyte precursor cells into mature myelin-producing oligodendrocytes, a series of studies was conducted in lysolecithin and cuprizone animal models of MS demyelination.

The studies using the lysolecithin model included vehicle controls and compared CNM-Au8’s effect on remyelinated axons after inducing spinal demyelination with lysolecithin. In the cuprizone studies, the treatments were delivered before injury to test prophylactic efficacy and after injury to test treatment efficacy. Markers of remyelination, such as oligodendrocyte maturation, myelin basic protein expression, and axonal staining, were evaluated by immunohistochemistry and transmission electron microscopy in animals sacrificed at various times after injury.

CNM-Au8 produced “striking visible evidence of progressive increase in myelin,” according to Mr. Hotchkin. The treatment was associated with reductions in myelin sheath degeneration and demyelinated areas, relative to vehicle. In one analysis of the lysolecithin model, CNM-Au8 was associated with a 43% increase in myelinated axon count. Moreover, an increase in mature oligodendrocytes localized at the site of focal demyelination injury in the CNM-Au8-treated animals was consistent with stimulation of oligodendrocyte maturation, according to Mr. Hotchkin.

In both models, investigators found evidence of increased oligodendrocyte maturation and remyelination when CNM-Au8 was administered after injury, as well as when it was administered before injury. The results suggest that CNM-Au8 has important activity in the remyelination of demyelinated axons.

Researchers also conducted behavioral studies in the cuprizone model of MS. They tracked the animals’ movement with lasers and used computer software to analyze the movement. These studies included relevant controls and compared animals with no demyelination, vehicle-treated animals dosed with cuprizone, and CNM-Au8-treated animals similarly dosed with cuprizone, to determine whether delayed treatment following initial damage from the toxin would result in functional recovery in the animals.

The investigators observed protective effects of CNM-Au8 when the drug was administered in this treatment paradigm. Improvements in several behavioral end points when the drug was administered after the demyelinating insult “demonstrated that CNM-Au8 restored behavioral function following demyelination,” said Mr. Hotchkin.

Furthermore, in a behavioral study of fine motor kinetics, function improved by 78% at week 6, compared with week 3 (ie, immediately following the start of treatment) in the group treated with CMN-Au8 that was receiving cuprizone. The animals treated with vehicle and cuprizone had a 39% functional improvement at week 6, compared with week 3. Notably, there was not a statistically significant difference in function at week 6 between CNM-Au8-treated animals and the normal healthy control animals without demyelination, indicating that the functional recovery made the former and latter animals indistinguishable.

Therapy Promotes Bioenergetics Catalysis

CNM-Au8 may generate remyelination by more than one mechanism, said Mr. Hotchkin, and evidence indicates that the drug promotes bioenergetic catalysis that is important to the maturation of oligodendrocyte precursors. Published literature suggests an association between altered oligodendrocyte energy utilization and remyelination failure in the human brain. Other evidence suggests that CNM-Au8 may trigger oligodendrocytes’ remyelinating activity by improving energy sources such as adenosine triphosphate, lactate, and oxidized nicotinamide adenine dinucleotide (NAD+), said Mr. Hotchkin. For example, CNM-Au8 increased NAD+ levels in mouse hippocampal cultures by about 40%, relative to vehicle.

In response to questions about the catalytic mechanism, Mr. Hotchkin responded, “You can fill a car’s tank with gas, but if the electrical system is fouled, the car goes nowhere. CNM-Au8 is the catalytic engine driving bioenergetic improvements in the oligodendrocytes driving them to remyelinate.” Data suggest that CNM-Au8 may have applications in other neurodegenerative diseases, based on the bioenergetic failure hypothesis of neurodegeneration and aging, said Mr. Hotchkin.

Oligodendrocyte precursor cells are known to be present in the human brain in and around MS lesions even years after an MS attack. Thus, the animal studies may be relevant to clinical MS. As an oral agent, CNM-Au8 has the potential to be a major clinical advance if human trials show activity comparable to that in animal studies, said Mr. Hotchkin.

Initial phase I human clinical work and extensive animal toxicology has supported the safety of this agent. Trials in patients with MS that examine clinical end points are planned. “A phase II study in chronic optic neuropathy in relapsing-remitting MS patients will commence in 2018,” Glen Frick, MD, PhD, Chief Medical Officer of Clene Nanomedicine, told Neurology Reviews.

—Ted Bosworth

Suggested Reading

Rone MB, Cui QL, Fang J, et al. Oligodendrogliopathy in multiple sclerosis: low glycolytic metabolic rate promotes oligodendrocyte survival. J Neurosci. 2016;36(17):4698-4707.

SAN DIEGO—A novel therapy designed to promote the maturation and activation of myelin-producing oligodendrocytes is moving to phase II clinical trials based on evidence of safety and efficacy in animal models and humans. The therapy, a suspension of clean-surfaced gold nanocrystals, may remyelinate multiple sclerosis (MS) lesions, according to research presented at the ACTRIMS 2018 Forum.

This agent, known as CNM-Au8, has been associated with improved behavioral function in animal models of MS, according to Michael Hotchkin, Head of Strategic Oper­ations at Clene Nanomedicine in Salt Lake City. Clene Nanomedicine is developing CNM-Au8. Although the mechanism of action is “multifactorial,” the benefit has been linked to bioenergetic support for the differentiation and maturation of oligodendrocyte precursor cells, said Mr. Hotchkin.

In one behavioral study of fine motor kinetics in an experimental model of MS, mice treated with CNM-Au8 “were effectively indistinguishable” from animals with no demyelination, he said.

Treatment Improved Two Models of Demyelination

Following in vitro studies that suggested that CNM-Au8 can promote the differentiation of oligodendrocyte precursor cells into mature myelin-producing oligodendrocytes, a series of studies was conducted in lysolecithin and cuprizone animal models of MS demyelination.

The studies using the lysolecithin model included vehicle controls and compared CNM-Au8’s effect on remyelinated axons after inducing spinal demyelination with lysolecithin. In the cuprizone studies, the treatments were delivered before injury to test prophylactic efficacy and after injury to test treatment efficacy. Markers of remyelination, such as oligodendrocyte maturation, myelin basic protein expression, and axonal staining, were evaluated by immunohistochemistry and transmission electron microscopy in animals sacrificed at various times after injury.

CNM-Au8 produced “striking visible evidence of progressive increase in myelin,” according to Mr. Hotchkin. The treatment was associated with reductions in myelin sheath degeneration and demyelinated areas, relative to vehicle. In one analysis of the lysolecithin model, CNM-Au8 was associated with a 43% increase in myelinated axon count. Moreover, an increase in mature oligodendrocytes localized at the site of focal demyelination injury in the CNM-Au8-treated animals was consistent with stimulation of oligodendrocyte maturation, according to Mr. Hotchkin.

In both models, investigators found evidence of increased oligodendrocyte maturation and remyelination when CNM-Au8 was administered after injury, as well as when it was administered before injury. The results suggest that CNM-Au8 has important activity in the remyelination of demyelinated axons.

Researchers also conducted behavioral studies in the cuprizone model of MS. They tracked the animals’ movement with lasers and used computer software to analyze the movement. These studies included relevant controls and compared animals with no demyelination, vehicle-treated animals dosed with cuprizone, and CNM-Au8-treated animals similarly dosed with cuprizone, to determine whether delayed treatment following initial damage from the toxin would result in functional recovery in the animals.

The investigators observed protective effects of CNM-Au8 when the drug was administered in this treatment paradigm. Improvements in several behavioral end points when the drug was administered after the demyelinating insult “demonstrated that CNM-Au8 restored behavioral function following demyelination,” said Mr. Hotchkin.

Furthermore, in a behavioral study of fine motor kinetics, function improved by 78% at week 6, compared with week 3 (ie, immediately following the start of treatment) in the group treated with CMN-Au8 that was receiving cuprizone. The animals treated with vehicle and cuprizone had a 39% functional improvement at week 6, compared with week 3. Notably, there was not a statistically significant difference in function at week 6 between CNM-Au8-treated animals and the normal healthy control animals without demyelination, indicating that the functional recovery made the former and latter animals indistinguishable.

Therapy Promotes Bioenergetics Catalysis

CNM-Au8 may generate remyelination by more than one mechanism, said Mr. Hotchkin, and evidence indicates that the drug promotes bioenergetic catalysis that is important to the maturation of oligodendrocyte precursors. Published literature suggests an association between altered oligodendrocyte energy utilization and remyelination failure in the human brain. Other evidence suggests that CNM-Au8 may trigger oligodendrocytes’ remyelinating activity by improving energy sources such as adenosine triphosphate, lactate, and oxidized nicotinamide adenine dinucleotide (NAD+), said Mr. Hotchkin. For example, CNM-Au8 increased NAD+ levels in mouse hippocampal cultures by about 40%, relative to vehicle.

In response to questions about the catalytic mechanism, Mr. Hotchkin responded, “You can fill a car’s tank with gas, but if the electrical system is fouled, the car goes nowhere. CNM-Au8 is the catalytic engine driving bioenergetic improvements in the oligodendrocytes driving them to remyelinate.” Data suggest that CNM-Au8 may have applications in other neurodegenerative diseases, based on the bioenergetic failure hypothesis of neurodegeneration and aging, said Mr. Hotchkin.

Oligodendrocyte precursor cells are known to be present in the human brain in and around MS lesions even years after an MS attack. Thus, the animal studies may be relevant to clinical MS. As an oral agent, CNM-Au8 has the potential to be a major clinical advance if human trials show activity comparable to that in animal studies, said Mr. Hotchkin.

Initial phase I human clinical work and extensive animal toxicology has supported the safety of this agent. Trials in patients with MS that examine clinical end points are planned. “A phase II study in chronic optic neuropathy in relapsing-remitting MS patients will commence in 2018,” Glen Frick, MD, PhD, Chief Medical Officer of Clene Nanomedicine, told Neurology Reviews.

—Ted Bosworth

Suggested Reading

Rone MB, Cui QL, Fang J, et al. Oligodendrogliopathy in multiple sclerosis: low glycolytic metabolic rate promotes oligodendrocyte survival. J Neurosci. 2016;36(17):4698-4707.

SAN DIEGO—A novel therapy designed to promote the maturation and activation of myelin-producing oligodendrocytes is moving to phase II clinical trials based on evidence of safety and efficacy in animal models and humans. The therapy, a suspension of clean-surfaced gold nanocrystals, may remyelinate multiple sclerosis (MS) lesions, according to research presented at the ACTRIMS 2018 Forum.

This agent, known as CNM-Au8, has been associated with improved behavioral function in animal models of MS, according to Michael Hotchkin, Head of Strategic Oper­ations at Clene Nanomedicine in Salt Lake City. Clene Nanomedicine is developing CNM-Au8. Although the mechanism of action is “multifactorial,” the benefit has been linked to bioenergetic support for the differentiation and maturation of oligodendrocyte precursor cells, said Mr. Hotchkin.

In one behavioral study of fine motor kinetics in an experimental model of MS, mice treated with CNM-Au8 “were effectively indistinguishable” from animals with no demyelination, he said.

Treatment Improved Two Models of Demyelination

Following in vitro studies that suggested that CNM-Au8 can promote the differentiation of oligodendrocyte precursor cells into mature myelin-producing oligodendrocytes, a series of studies was conducted in lysolecithin and cuprizone animal models of MS demyelination.

The studies using the lysolecithin model included vehicle controls and compared CNM-Au8’s effect on remyelinated axons after inducing spinal demyelination with lysolecithin. In the cuprizone studies, the treatments were delivered before injury to test prophylactic efficacy and after injury to test treatment efficacy. Markers of remyelination, such as oligodendrocyte maturation, myelin basic protein expression, and axonal staining, were evaluated by immunohistochemistry and transmission electron microscopy in animals sacrificed at various times after injury.

CNM-Au8 produced “striking visible evidence of progressive increase in myelin,” according to Mr. Hotchkin. The treatment was associated with reductions in myelin sheath degeneration and demyelinated areas, relative to vehicle. In one analysis of the lysolecithin model, CNM-Au8 was associated with a 43% increase in myelinated axon count. Moreover, an increase in mature oligodendrocytes localized at the site of focal demyelination injury in the CNM-Au8-treated animals was consistent with stimulation of oligodendrocyte maturation, according to Mr. Hotchkin.

In both models, investigators found evidence of increased oligodendrocyte maturation and remyelination when CNM-Au8 was administered after injury, as well as when it was administered before injury. The results suggest that CNM-Au8 has important activity in the remyelination of demyelinated axons.

Researchers also conducted behavioral studies in the cuprizone model of MS. They tracked the animals’ movement with lasers and used computer software to analyze the movement. These studies included relevant controls and compared animals with no demyelination, vehicle-treated animals dosed with cuprizone, and CNM-Au8-treated animals similarly dosed with cuprizone, to determine whether delayed treatment following initial damage from the toxin would result in functional recovery in the animals.

The investigators observed protective effects of CNM-Au8 when the drug was administered in this treatment paradigm. Improvements in several behavioral end points when the drug was administered after the demyelinating insult “demonstrated that CNM-Au8 restored behavioral function following demyelination,” said Mr. Hotchkin.

Furthermore, in a behavioral study of fine motor kinetics, function improved by 78% at week 6, compared with week 3 (ie, immediately following the start of treatment) in the group treated with CMN-Au8 that was receiving cuprizone. The animals treated with vehicle and cuprizone had a 39% functional improvement at week 6, compared with week 3. Notably, there was not a statistically significant difference in function at week 6 between CNM-Au8-treated animals and the normal healthy control animals without demyelination, indicating that the functional recovery made the former and latter animals indistinguishable.

Therapy Promotes Bioenergetics Catalysis

CNM-Au8 may generate remyelination by more than one mechanism, said Mr. Hotchkin, and evidence indicates that the drug promotes bioenergetic catalysis that is important to the maturation of oligodendrocyte precursors. Published literature suggests an association between altered oligodendrocyte energy utilization and remyelination failure in the human brain. Other evidence suggests that CNM-Au8 may trigger oligodendrocytes’ remyelinating activity by improving energy sources such as adenosine triphosphate, lactate, and oxidized nicotinamide adenine dinucleotide (NAD+), said Mr. Hotchkin. For example, CNM-Au8 increased NAD+ levels in mouse hippocampal cultures by about 40%, relative to vehicle.

In response to questions about the catalytic mechanism, Mr. Hotchkin responded, “You can fill a car’s tank with gas, but if the electrical system is fouled, the car goes nowhere. CNM-Au8 is the catalytic engine driving bioenergetic improvements in the oligodendrocytes driving them to remyelinate.” Data suggest that CNM-Au8 may have applications in other neurodegenerative diseases, based on the bioenergetic failure hypothesis of neurodegeneration and aging, said Mr. Hotchkin.

Oligodendrocyte precursor cells are known to be present in the human brain in and around MS lesions even years after an MS attack. Thus, the animal studies may be relevant to clinical MS. As an oral agent, CNM-Au8 has the potential to be a major clinical advance if human trials show activity comparable to that in animal studies, said Mr. Hotchkin.

Initial phase I human clinical work and extensive animal toxicology has supported the safety of this agent. Trials in patients with MS that examine clinical end points are planned. “A phase II study in chronic optic neuropathy in relapsing-remitting MS patients will commence in 2018,” Glen Frick, MD, PhD, Chief Medical Officer of Clene Nanomedicine, told Neurology Reviews.

—Ted Bosworth

Suggested Reading

Rone MB, Cui QL, Fang J, et al. Oligodendrogliopathy in multiple sclerosis: low glycolytic metabolic rate promotes oligodendrocyte survival. J Neurosci. 2016;36(17):4698-4707.

Women with relapsing-remitting multiple sclerosis (MS) who discontinue natalizumab treatment before pregnancy may have increased disease activity, according to a study published March 6 in Neurology. In addition, taking natalizumab during the first trimester of pregnancy increases the risk of miscarriage, although the risk remains similar to that of the general population, according to an accompanying study.

An Analysis of Pregnancy Data

Emilio Portaccio, MD, of the Don Carlo Gnocchi Foundation in Florence, Italy, and colleagues analyzed data for all pregnancies between 2009 and 2015 in patients with MS who presented to 19 Italian sites. They compared data for 83 patients receiving natalizumab with those for 350 control patients who were receiving injectable immunomodulatory agents or no treatment. The investigators followed up with the women every six months, at each relapse, and at one year after birth.

The patients receiving natalizumab had 92 pregnancies. Approximately 37% of women receiving natalizumab had at least one relapse during pregnancy, compared with 10% of controls. Relapse rate during pregnancy was higher among patients whose last infusion occurred before the last menstrual period (55.9%) than among patients whose last infusion occurred after the last menstrual period (20%) or controls (10%). Receiving the last natalizumab infusion before the last menstrual period was the only predictor of relapse during pregnancy. In the first trimester after delivery, the rate of relapse was 21.7% in natalizumab-treated patients and 13.7% in controls.

Twelve patients had disability worsening at the end of the one-year follow-up. In 11 of these patients, disability accumulation resulted from relapses during pregnancy or after delivery. Disease progression was reduced in patients for whom medication was reintroduced earlier after delivery.

About 75% of pregnancies in women receiving natalizumab had treatment exposure, and the mean duration of exposure was 1.2 weeks. The odds ratio of spontaneous abortion was 3.9 among patients receiving natalizumab, compared with controls. The rate of spontaneous abortion among natalizumab-treated patients (17.4%) was similar to that observed for the general Italian population (14%), however. The rate of major congenital anomalies was 3.7% in patients exposed to natalizumab, 1.3% in patients exposed to interferon beta, and 0.9% in untreated patients. The differences between groups were not significant. Exposure to natalizumab and exposure to interferon beta were associated with a lower length of the newborn.

Relapse Severity Was Not Measured

One limitation of the studies is that the women treated with natalizumab may have been different from women not treated with natalizumab in ways that the investigators did not measure. In addition, the researchers did not measure relapse severity.

“Our findings suggest that if women who take natalizumab for MS want to become pregnant, it may be best to continue treatment up until a pregnancy test is positive and then at that point discontinue use,” said Dr. Portaccio. “While there is still a risk of increased disease activity, this course of action may lower that risk.”

—Erik Greb

Suggested Reading

Portaccio E, Annovazzi P, Ghezzi A, et al. Pregnancy decision-making in women with multiple sclerosis treated with natalizumab: I: Fetal risks. Neurology. 2018;90(10):e823-e831.

Portaccio E, Moiola L, Martinelli V, et al. Pregnancy decision-making in women with multiple sclerosis treated with natalizumab: II: Maternal risks. Neurology. 2018;90(10):e832-e839.

Women with relapsing-remitting multiple sclerosis (MS) who discontinue natalizumab treatment before pregnancy may have increased disease activity, according to a study published March 6 in Neurology. In addition, taking natalizumab during the first trimester of pregnancy increases the risk of miscarriage, although the risk remains similar to that of the general population, according to an accompanying study.

An Analysis of Pregnancy Data

Emilio Portaccio, MD, of the Don Carlo Gnocchi Foundation in Florence, Italy, and colleagues analyzed data for all pregnancies between 2009 and 2015 in patients with MS who presented to 19 Italian sites. They compared data for 83 patients receiving natalizumab with those for 350 control patients who were receiving injectable immunomodulatory agents or no treatment. The investigators followed up with the women every six months, at each relapse, and at one year after birth.

The patients receiving natalizumab had 92 pregnancies. Approximately 37% of women receiving natalizumab had at least one relapse during pregnancy, compared with 10% of controls. Relapse rate during pregnancy was higher among patients whose last infusion occurred before the last menstrual period (55.9%) than among patients whose last infusion occurred after the last menstrual period (20%) or controls (10%). Receiving the last natalizumab infusion before the last menstrual period was the only predictor of relapse during pregnancy. In the first trimester after delivery, the rate of relapse was 21.7% in natalizumab-treated patients and 13.7% in controls.

Twelve patients had disability worsening at the end of the one-year follow-up. In 11 of these patients, disability accumulation resulted from relapses during pregnancy or after delivery. Disease progression was reduced in patients for whom medication was reintroduced earlier after delivery.

About 75% of pregnancies in women receiving natalizumab had treatment exposure, and the mean duration of exposure was 1.2 weeks. The odds ratio of spontaneous abortion was 3.9 among patients receiving natalizumab, compared with controls. The rate of spontaneous abortion among natalizumab-treated patients (17.4%) was similar to that observed for the general Italian population (14%), however. The rate of major congenital anomalies was 3.7% in patients exposed to natalizumab, 1.3% in patients exposed to interferon beta, and 0.9% in untreated patients. The differences between groups were not significant. Exposure to natalizumab and exposure to interferon beta were associated with a lower length of the newborn.

Relapse Severity Was Not Measured

One limitation of the studies is that the women treated with natalizumab may have been different from women not treated with natalizumab in ways that the investigators did not measure. In addition, the researchers did not measure relapse severity.

“Our findings suggest that if women who take natalizumab for MS want to become pregnant, it may be best to continue treatment up until a pregnancy test is positive and then at that point discontinue use,” said Dr. Portaccio. “While there is still a risk of increased disease activity, this course of action may lower that risk.”

—Erik Greb

Suggested Reading

Portaccio E, Annovazzi P, Ghezzi A, et al. Pregnancy decision-making in women with multiple sclerosis treated with natalizumab: I: Fetal risks. Neurology. 2018;90(10):e823-e831.

Portaccio E, Moiola L, Martinelli V, et al. Pregnancy decision-making in women with multiple sclerosis treated with natalizumab: II: Maternal risks. Neurology. 2018;90(10):e832-e839.

Women with relapsing-remitting multiple sclerosis (MS) who discontinue natalizumab treatment before pregnancy may have increased disease activity, according to a study published March 6 in Neurology. In addition, taking natalizumab during the first trimester of pregnancy increases the risk of miscarriage, although the risk remains similar to that of the general population, according to an accompanying study.

An Analysis of Pregnancy Data

Emilio Portaccio, MD, of the Don Carlo Gnocchi Foundation in Florence, Italy, and colleagues analyzed data for all pregnancies between 2009 and 2015 in patients with MS who presented to 19 Italian sites. They compared data for 83 patients receiving natalizumab with those for 350 control patients who were receiving injectable immunomodulatory agents or no treatment. The investigators followed up with the women every six months, at each relapse, and at one year after birth.

The patients receiving natalizumab had 92 pregnancies. Approximately 37% of women receiving natalizumab had at least one relapse during pregnancy, compared with 10% of controls. Relapse rate during pregnancy was higher among patients whose last infusion occurred before the last menstrual period (55.9%) than among patients whose last infusion occurred after the last menstrual period (20%) or controls (10%). Receiving the last natalizumab infusion before the last menstrual period was the only predictor of relapse during pregnancy. In the first trimester after delivery, the rate of relapse was 21.7% in natalizumab-treated patients and 13.7% in controls.

Twelve patients had disability worsening at the end of the one-year follow-up. In 11 of these patients, disability accumulation resulted from relapses during pregnancy or after delivery. Disease progression was reduced in patients for whom medication was reintroduced earlier after delivery.

About 75% of pregnancies in women receiving natalizumab had treatment exposure, and the mean duration of exposure was 1.2 weeks. The odds ratio of spontaneous abortion was 3.9 among patients receiving natalizumab, compared with controls. The rate of spontaneous abortion among natalizumab-treated patients (17.4%) was similar to that observed for the general Italian population (14%), however. The rate of major congenital anomalies was 3.7% in patients exposed to natalizumab, 1.3% in patients exposed to interferon beta, and 0.9% in untreated patients. The differences between groups were not significant. Exposure to natalizumab and exposure to interferon beta were associated with a lower length of the newborn.

Relapse Severity Was Not Measured

One limitation of the studies is that the women treated with natalizumab may have been different from women not treated with natalizumab in ways that the investigators did not measure. In addition, the researchers did not measure relapse severity.

“Our findings suggest that if women who take natalizumab for MS want to become pregnant, it may be best to continue treatment up until a pregnancy test is positive and then at that point discontinue use,” said Dr. Portaccio. “While there is still a risk of increased disease activity, this course of action may lower that risk.”

—Erik Greb

Suggested Reading

Portaccio E, Annovazzi P, Ghezzi A, et al. Pregnancy decision-making in women with multiple sclerosis treated with natalizumab: I: Fetal risks. Neurology. 2018;90(10):e823-e831.

Portaccio E, Moiola L, Martinelli V, et al. Pregnancy decision-making in women with multiple sclerosis treated with natalizumab: II: Maternal risks. Neurology. 2018;90(10):e832-e839.

Cannabis extract, physical activity, and cognitive behavioral therapy are complementary and alternative medicines (CAMs) with the strongest evidence of efficacy for multiple sclerosis (MS), according to a systematic review published in the January issue of Journal of Neurology, Neurosurgery and Psychiatry. However, there is little class I and class II evidence to support the effect of CAMs.

“We found little evidence for CAM treatments of MS, and class I evidence was almost universally lacking,” said Suzi B. Claflin, PhD, a postdoctoral research fellow at Menzies Institute for Medical Research at the University of Tasmania in Hobart, Australia, and colleagues. Some CAM treatments were evaluated in a single study, and when treatments were evaluated in more than one study, the studies “had different designs and methodologies, and in some cases, contradictory results.”

A Systematic Review

There is an in interest in CAM treatments among the MS community, possibly due to perceived and actual shortcomings of available pharmacologic treatments, said the researchers. Cross-sectional studies have found that 37% to 100% of patients with MS have used CAMs at some point in their lives, and up to 51.8% of these patients have used CAMs in the past year. Despite the common use of CAMs, there is a lack of understanding of their efficacy, the authors noted.

The World Health Organization has defined CAM as “a broad set of health care practices that are not part of [a] country’s own tradition and are not integrated into the dominant health care system.” For the present review, however, the researchers defined CAM broadly as a noninvasive therapy used in addition to or in lieu of the standard pharmacologic treatment of MS.

To provide an overview of the modern evidence for CAM use in patients with MS and to highlight future directions for research, Dr. Claflin and colleagues conducted a systematic review of full research articles published between January 1, 2001, and January 18, 2017, that were written in English, had only human participants, and tested the effect of a CAM treatment on health outcomes in patients with MS only. The researchers included in their review studies with at least 50 participants that provided class I or class II evidence of efficacy. In all, they included 38 studies and divided them into the following five CAM types: cannabis, diet, exercise, psychologic approaches, and other.

Best-Supported Evidence

Five studies found significant beneficial effects of cannabis extract for incontinence, pain, spasticity, and muscle stiffness, whereas two studies found no effect of cannabis extract on primary outcomes. A single study found a positive effect of tetrahydrocannabinol extract on incontinence, and one study found no effect for this treatment on spasticity.

Psychologic approaches such as cognitive behavioral therapy (CBT) appear to be effective in treating MS-related psychologic symptoms. Seven class II studies found that CBT significantly improved depression, fatigue, distress, and general health. In one study, there was no effect of CBT on functional impairment. In a single study, there was no effect of cognitive rehabilitation on function. In another study, mindfulness significantly improved health-related quality of life, depression, and fatigue.

Among exercise treatments, some balance and gait training techniques significantly improved fatigue, balance, walking, and endurance, while other techniques did not. Exercise generally was found to improve muscle strength and mobility-related health outcomes in several studies, and may have some effect on psychologic symptoms. In several studies, however, primary outcomes were not significantly affected. In a single study, yoga had no effect on attention and alertness. In another study, group yoga was not effective in improving MS Impact Scale scores, but some effects on secondary outcomes were observed.

Least-Supported Evidence

Among dietary treatments, biotin had a significant effect on disability progression in one study. In another single study, there was no effect of gingko biloba on cognitive function. Two studies of polyunsaturated fatty acid supplementation for disability had contradictory results: one study found that the treatment reduced relapse rate, and another study found no effect on gadolinium-enhancing lesions. In addition, three studies found no effect of vitamin D supplementation after MS onset on primary outcomes, but one of the studies found some suggestion of benefit of vitamin D as an add-on treatment.

Among other CAMs, acupressure significantly reduced fatigue in a single study. In another single study, amphetamine salts improved processing speed. Two studies found contradictory results for the efficacy of reflexology for pain. Finally, one study found a positive effect of relaxation on stress and depression, and one study found a positive effect of relaxation on pain.

“In order to improve our understanding of the effects of CAM on MS health outcomes, future work should cultivate methodological consistency by establishing standard control or comparator groups and outcome measures,” said Dr. Claflin and colleagues. “This field would also be well served by establishing outcomes of interest, which would allow for greater replication and the accrual of a depth of evidence about an outcome.”

—Erica Tricarico

Suggested Reading

Claflin SB, van der Mei IAF, Taylor BV. Complementary and alternative treatments of multiple sclerosis: a review of the evidence from 2001 to 2016. J Neurol Neurosurg Psychiatry. 2018;89(1):34-41.

Cannabis extract, physical activity, and cognitive behavioral therapy are complementary and alternative medicines (CAMs) with the strongest evidence of efficacy for multiple sclerosis (MS), according to a systematic review published in the January issue of Journal of Neurology, Neurosurgery and Psychiatry. However, there is little class I and class II evidence to support the effect of CAMs.

“We found little evidence for CAM treatments of MS, and class I evidence was almost universally lacking,” said Suzi B. Claflin, PhD, a postdoctoral research fellow at Menzies Institute for Medical Research at the University of Tasmania in Hobart, Australia, and colleagues. Some CAM treatments were evaluated in a single study, and when treatments were evaluated in more than one study, the studies “had different designs and methodologies, and in some cases, contradictory results.”

A Systematic Review

There is an in interest in CAM treatments among the MS community, possibly due to perceived and actual shortcomings of available pharmacologic treatments, said the researchers. Cross-sectional studies have found that 37% to 100% of patients with MS have used CAMs at some point in their lives, and up to 51.8% of these patients have used CAMs in the past year. Despite the common use of CAMs, there is a lack of understanding of their efficacy, the authors noted.

The World Health Organization has defined CAM as “a broad set of health care practices that are not part of [a] country’s own tradition and are not integrated into the dominant health care system.” For the present review, however, the researchers defined CAM broadly as a noninvasive therapy used in addition to or in lieu of the standard pharmacologic treatment of MS.

To provide an overview of the modern evidence for CAM use in patients with MS and to highlight future directions for research, Dr. Claflin and colleagues conducted a systematic review of full research articles published between January 1, 2001, and January 18, 2017, that were written in English, had only human participants, and tested the effect of a CAM treatment on health outcomes in patients with MS only. The researchers included in their review studies with at least 50 participants that provided class I or class II evidence of efficacy. In all, they included 38 studies and divided them into the following five CAM types: cannabis, diet, exercise, psychologic approaches, and other.

Best-Supported Evidence

Five studies found significant beneficial effects of cannabis extract for incontinence, pain, spasticity, and muscle stiffness, whereas two studies found no effect of cannabis extract on primary outcomes. A single study found a positive effect of tetrahydrocannabinol extract on incontinence, and one study found no effect for this treatment on spasticity.

Psychologic approaches such as cognitive behavioral therapy (CBT) appear to be effective in treating MS-related psychologic symptoms. Seven class II studies found that CBT significantly improved depression, fatigue, distress, and general health. In one study, there was no effect of CBT on functional impairment. In a single study, there was no effect of cognitive rehabilitation on function. In another study, mindfulness significantly improved health-related quality of life, depression, and fatigue.

Among exercise treatments, some balance and gait training techniques significantly improved fatigue, balance, walking, and endurance, while other techniques did not. Exercise generally was found to improve muscle strength and mobility-related health outcomes in several studies, and may have some effect on psychologic symptoms. In several studies, however, primary outcomes were not significantly affected. In a single study, yoga had no effect on attention and alertness. In another study, group yoga was not effective in improving MS Impact Scale scores, but some effects on secondary outcomes were observed.

Least-Supported Evidence

Among dietary treatments, biotin had a significant effect on disability progression in one study. In another single study, there was no effect of gingko biloba on cognitive function. Two studies of polyunsaturated fatty acid supplementation for disability had contradictory results: one study found that the treatment reduced relapse rate, and another study found no effect on gadolinium-enhancing lesions. In addition, three studies found no effect of vitamin D supplementation after MS onset on primary outcomes, but one of the studies found some suggestion of benefit of vitamin D as an add-on treatment.

Among other CAMs, acupressure significantly reduced fatigue in a single study. In another single study, amphetamine salts improved processing speed. Two studies found contradictory results for the efficacy of reflexology for pain. Finally, one study found a positive effect of relaxation on stress and depression, and one study found a positive effect of relaxation on pain.

“In order to improve our understanding of the effects of CAM on MS health outcomes, future work should cultivate methodological consistency by establishing standard control or comparator groups and outcome measures,” said Dr. Claflin and colleagues. “This field would also be well served by establishing outcomes of interest, which would allow for greater replication and the accrual of a depth of evidence about an outcome.”

—Erica Tricarico

Suggested Reading

Claflin SB, van der Mei IAF, Taylor BV. Complementary and alternative treatments of multiple sclerosis: a review of the evidence from 2001 to 2016. J Neurol Neurosurg Psychiatry. 2018;89(1):34-41.

Cannabis extract, physical activity, and cognitive behavioral therapy are complementary and alternative medicines (CAMs) with the strongest evidence of efficacy for multiple sclerosis (MS), according to a systematic review published in the January issue of Journal of Neurology, Neurosurgery and Psychiatry. However, there is little class I and class II evidence to support the effect of CAMs.

“We found little evidence for CAM treatments of MS, and class I evidence was almost universally lacking,” said Suzi B. Claflin, PhD, a postdoctoral research fellow at Menzies Institute for Medical Research at the University of Tasmania in Hobart, Australia, and colleagues. Some CAM treatments were evaluated in a single study, and when treatments were evaluated in more than one study, the studies “had different designs and methodologies, and in some cases, contradictory results.”

A Systematic Review

There is an in interest in CAM treatments among the MS community, possibly due to perceived and actual shortcomings of available pharmacologic treatments, said the researchers. Cross-sectional studies have found that 37% to 100% of patients with MS have used CAMs at some point in their lives, and up to 51.8% of these patients have used CAMs in the past year. Despite the common use of CAMs, there is a lack of understanding of their efficacy, the authors noted.

The World Health Organization has defined CAM as “a broad set of health care practices that are not part of [a] country’s own tradition and are not integrated into the dominant health care system.” For the present review, however, the researchers defined CAM broadly as a noninvasive therapy used in addition to or in lieu of the standard pharmacologic treatment of MS.

To provide an overview of the modern evidence for CAM use in patients with MS and to highlight future directions for research, Dr. Claflin and colleagues conducted a systematic review of full research articles published between January 1, 2001, and January 18, 2017, that were written in English, had only human participants, and tested the effect of a CAM treatment on health outcomes in patients with MS only. The researchers included in their review studies with at least 50 participants that provided class I or class II evidence of efficacy. In all, they included 38 studies and divided them into the following five CAM types: cannabis, diet, exercise, psychologic approaches, and other.

Best-Supported Evidence

Five studies found significant beneficial effects of cannabis extract for incontinence, pain, spasticity, and muscle stiffness, whereas two studies found no effect of cannabis extract on primary outcomes. A single study found a positive effect of tetrahydrocannabinol extract on incontinence, and one study found no effect for this treatment on spasticity.

Psychologic approaches such as cognitive behavioral therapy (CBT) appear to be effective in treating MS-related psychologic symptoms. Seven class II studies found that CBT significantly improved depression, fatigue, distress, and general health. In one study, there was no effect of CBT on functional impairment. In a single study, there was no effect of cognitive rehabilitation on function. In another study, mindfulness significantly improved health-related quality of life, depression, and fatigue.

Among exercise treatments, some balance and gait training techniques significantly improved fatigue, balance, walking, and endurance, while other techniques did not. Exercise generally was found to improve muscle strength and mobility-related health outcomes in several studies, and may have some effect on psychologic symptoms. In several studies, however, primary outcomes were not significantly affected. In a single study, yoga had no effect on attention and alertness. In another study, group yoga was not effective in improving MS Impact Scale scores, but some effects on secondary outcomes were observed.

Least-Supported Evidence

Among dietary treatments, biotin had a significant effect on disability progression in one study. In another single study, there was no effect of gingko biloba on cognitive function. Two studies of polyunsaturated fatty acid supplementation for disability had contradictory results: one study found that the treatment reduced relapse rate, and another study found no effect on gadolinium-enhancing lesions. In addition, three studies found no effect of vitamin D supplementation after MS onset on primary outcomes, but one of the studies found some suggestion of benefit of vitamin D as an add-on treatment.

Among other CAMs, acupressure significantly reduced fatigue in a single study. In another single study, amphetamine salts improved processing speed. Two studies found contradictory results for the efficacy of reflexology for pain. Finally, one study found a positive effect of relaxation on stress and depression, and one study found a positive effect of relaxation on pain.

“In order to improve our understanding of the effects of CAM on MS health outcomes, future work should cultivate methodological consistency by establishing standard control or comparator groups and outcome measures,” said Dr. Claflin and colleagues. “This field would also be well served by establishing outcomes of interest, which would allow for greater replication and the accrual of a depth of evidence about an outcome.”

—Erica Tricarico

Suggested Reading

Claflin SB, van der Mei IAF, Taylor BV. Complementary and alternative treatments of multiple sclerosis: a review of the evidence from 2001 to 2016. J Neurol Neurosurg Psychiatry. 2018;89(1):34-41.

A standardized frankincense extract was safe, well tolerated, and potentially efficacious as an oral treatment in patients with relapsing-remitting multiple sclerosis (RRMS), according to results of a small, nonrandomized study.

Patients receiving the herbal treatment had significantly fewer contrast-enhancing lesions on MRI versus baseline in the study, which was published in the Journal of Neurology, Neurosurgery & Psychiatry.

designer491/Thinkstock

Patients underwent observation for 4 months, then were treated with the extract for up to 8 months plus an optional extension phase of up to 36 months. A total of 28 patients completed the initial treatment period, and 18 participated in the extension period, according to the study results.

The median number of monthly contrast-enhancing lesions was significantly reduced from 1.00 at baseline to 0.50 during the initial treatment period (P less than .0001). In addition, significantly less brain atrophy was noted after the treatment phase as compared with the baseline observation phase (P = .0081).

Adverse events, mainly infections or gastrointestinal symptoms, were mild (57.7%) or moderate (38.6%), investigators added.

Treatment significantly increased regulatory CD4-positive T cell markers and decreased interleukin-17A–producing CD8-positive T cells, according to results of mechanistic studies that were also reported.

Other anti-inflammatory drugs that have been licensed act broadly on the immune system, according to investigators, and so those agents require careful monitoring for side effects.

“The right balance between efficacy and safety profile becomes increasingly more important for a young patient population, who require long-term treatment,” Dr. Stürner and her coauthors wrote. “The results of the SABA trial are promising from this perspective.”

The study was funded in part by Alpinia Laudanum Institute, which supplied the standardized frankincense extract at no charge. Individual authors reported competing interests with Alpinia Laudanum, Biogen, Sanofi Genzyme, Novartis, Merck Serono, and others.

SOURCE: Stürner KH et al. J Neurol Neurosurg Psychiatry. 2018 Apr;89(4):330-8.

A standardized frankincense extract was safe, well tolerated, and potentially efficacious as an oral treatment in patients with relapsing-remitting multiple sclerosis (RRMS), according to results of a small, nonrandomized study.

Patients receiving the herbal treatment had significantly fewer contrast-enhancing lesions on MRI versus baseline in the study, which was published in the Journal of Neurology, Neurosurgery & Psychiatry.

designer491/Thinkstock

Patients underwent observation for 4 months, then were treated with the extract for up to 8 months plus an optional extension phase of up to 36 months. A total of 28 patients completed the initial treatment period, and 18 participated in the extension period, according to the study results.

The median number of monthly contrast-enhancing lesions was significantly reduced from 1.00 at baseline to 0.50 during the initial treatment period (P less than .0001). In addition, significantly less brain atrophy was noted after the treatment phase as compared with the baseline observation phase (P = .0081).

Adverse events, mainly infections or gastrointestinal symptoms, were mild (57.7%) or moderate (38.6%), investigators added.

Treatment significantly increased regulatory CD4-positive T cell markers and decreased interleukin-17A–producing CD8-positive T cells, according to results of mechanistic studies that were also reported.

Other anti-inflammatory drugs that have been licensed act broadly on the immune system, according to investigators, and so those agents require careful monitoring for side effects.

“The right balance between efficacy and safety profile becomes increasingly more important for a young patient population, who require long-term treatment,” Dr. Stürner and her coauthors wrote. “The results of the SABA trial are promising from this perspective.”

The study was funded in part by Alpinia Laudanum Institute, which supplied the standardized frankincense extract at no charge. Individual authors reported competing interests with Alpinia Laudanum, Biogen, Sanofi Genzyme, Novartis, Merck Serono, and others.

SOURCE: Stürner KH et al. J Neurol Neurosurg Psychiatry. 2018 Apr;89(4):330-8.

A standardized frankincense extract was safe, well tolerated, and potentially efficacious as an oral treatment in patients with relapsing-remitting multiple sclerosis (RRMS), according to results of a small, nonrandomized study.

Patients receiving the herbal treatment had significantly fewer contrast-enhancing lesions on MRI versus baseline in the study, which was published in the Journal of Neurology, Neurosurgery & Psychiatry.

designer491/Thinkstock

Patients underwent observation for 4 months, then were treated with the extract for up to 8 months plus an optional extension phase of up to 36 months. A total of 28 patients completed the initial treatment period, and 18 participated in the extension period, according to the study results.

The median number of monthly contrast-enhancing lesions was significantly reduced from 1.00 at baseline to 0.50 during the initial treatment period (P less than .0001). In addition, significantly less brain atrophy was noted after the treatment phase as compared with the baseline observation phase (P = .0081).

Adverse events, mainly infections or gastrointestinal symptoms, were mild (57.7%) or moderate (38.6%), investigators added.

Treatment significantly increased regulatory CD4-positive T cell markers and decreased interleukin-17A–producing CD8-positive T cells, according to results of mechanistic studies that were also reported.

Other anti-inflammatory drugs that have been licensed act broadly on the immune system, according to investigators, and so those agents require careful monitoring for side effects.

“The right balance between efficacy and safety profile becomes increasingly more important for a young patient population, who require long-term treatment,” Dr. Stürner and her coauthors wrote. “The results of the SABA trial are promising from this perspective.”

The study was funded in part by Alpinia Laudanum Institute, which supplied the standardized frankincense extract at no charge. Individual authors reported competing interests with Alpinia Laudanum, Biogen, Sanofi Genzyme, Novartis, Merck Serono, and others.

SOURCE: Stürner KH et al. J Neurol Neurosurg Psychiatry. 2018 Apr;89(4):330-8.