From the AGA Journals

Patients with Crohn’s disease who experienced complete endoscopic healing with biologic therapy had significantly lower subsequent rates of treatment failure, intestinal resection, and hospitalization, compared with patients who experienced only partial mucosal healing, according to the findings of a two-center retrospective study.

Over a median of 4.8 years of follow-up (interquartile range, 2.1-7.2 years) rates of treatment failure were 25% in patients with complete mucosal healing at baseline (that is, a Crohn’s Disease Endoscopic Index of Severity [CDEIS] score of 0) and 48% in patients with partial healing (CDEIS score greater than 0 but less than 4). The difference was statistically significant (P = .045). No patient with a baseline CDEIS score of 0 required intestinal resection, compared with 11% of patients with scores greater than 0 but less than 4 (P = .031). Rates of hospitalization because of Crohn’s disease were 3.5% versus 18.5%, respectively (P = .013). Clara Yzet, MD, of Amiens (France) University Hospital, Université de Picardie Jules Verne, reported the findings together with her associates in Clinical Gastroenterology and Hepatology.

Mucosal healing is a key therapeutic target in Crohn’s disease that has been linked to desirable outcomes, such as steroid-free remission and a lower rate of intestinal resection. However, prior observational studies have inconsistently defined mucosal healing, and clinical trials of biologics have used any of at least seven different definitions, the researchers wrote. Recently, in patients with ulcerative colitis, a Scandinavian Journal of Gastroenterology and another in the Journal of Crohn’s and Colitis linked a stricter definition of mucosal healing (an endoscopic Mayo score of 0, or histologic healing) with superior long-term clinical outcomes. In patients with Crohn’s disease, however, there has been no established threshold for mucosal healing based on either the CDEIS or the Simplified Endoscopic Score for Crohn’s disease (SES-CD).

Therefore, Dr. Yzet and her associates identified and reviewed the medical records of 84 consecutive adults with clinically remitted Crohn’s disease who received anti–tumor necrosis factor therapies (infliximab and adalimumab) or vedolizumab at two university hospitals in France between 2008 and 2015. All patients received baseline and follow-up colonoscopies, with results scored on the CDEIS. In all cases, the second CDEIS score was less than 4 (the CDEIS ranges from 0 to 44). The primary outcome was treatment failure, defined as the need for biologic optimization (increasing the dose or shortening the dosing interval of the biologic), corticosteroids, or immunosuppressants; a Harvey-Bradshaw score greater than 4 associated with a change in treatment; or the need for intestinal resection or hospitalization because of Crohn’s disease.

At baseline, 57 patients had CDEIS scores of 0 (complete mucosal healing) and 27 patients had scores greater than 0 but less than 4 (partial mucosal healing). The two groups were otherwise similar except that patients with complete mucosal healing had a shorter median duration of Crohn’s disease (10.3 vs. 15.1 years in the partial healing group; P = .029) and a lower prevalence of Crohn’s disease phenotype B2 (stricturing) according to the Vienna classification (1.8% vs. 14.8%; P = .035). In the multivariate analysis, CDEIS score was the only factor associated with treatment failure (hazard ratio, 2.61; 95% confidence interval, 1.16-5.88; P = .02).

“Our findings suggest that we should be more ambitious in clinical practice to change patients’ life and disease course by achieving complete endoscopic healing. However, this strategy could be limited by the ability of current drugs to achieve complete mucosal healing,” the researchers wrote. “Obtaining a complete mucosal healing would require today a significant need for optimization or change of biologics.”

No external funding sources were reported. Two coinvestigators disclosed ties to AbbVie, Amgen, Biogaran, Biogen, Ferring, Janssen, MSD, Pfizer, Takeda, and several other pharmaceutical companies. The remaining investigators reported having no relevant conflicts of interest.

SOURCE: Yzet C et al. Clin Gastroenterol Hepatol. 2019 Nov 16. doi: 10.1016/j.cgh.2019.11.025.
 

Patients with Crohn’s disease who experienced complete endoscopic healing with biologic therapy had significantly lower subsequent rates of treatment failure, intestinal resection, and hospitalization, compared with patients who experienced only partial mucosal healing, according to the findings of a two-center retrospective study.

Over a median of 4.8 years of follow-up (interquartile range, 2.1-7.2 years) rates of treatment failure were 25% in patients with complete mucosal healing at baseline (that is, a Crohn’s Disease Endoscopic Index of Severity [CDEIS] score of 0) and 48% in patients with partial healing (CDEIS score greater than 0 but less than 4). The difference was statistically significant (P = .045). No patient with a baseline CDEIS score of 0 required intestinal resection, compared with 11% of patients with scores greater than 0 but less than 4 (P = .031). Rates of hospitalization because of Crohn’s disease were 3.5% versus 18.5%, respectively (P = .013). Clara Yzet, MD, of Amiens (France) University Hospital, Université de Picardie Jules Verne, reported the findings together with her associates in Clinical Gastroenterology and Hepatology.

Mucosal healing is a key therapeutic target in Crohn’s disease that has been linked to desirable outcomes, such as steroid-free remission and a lower rate of intestinal resection. However, prior observational studies have inconsistently defined mucosal healing, and clinical trials of biologics have used any of at least seven different definitions, the researchers wrote. Recently, in patients with ulcerative colitis, a Scandinavian Journal of Gastroenterology and another in the Journal of Crohn’s and Colitis linked a stricter definition of mucosal healing (an endoscopic Mayo score of 0, or histologic healing) with superior long-term clinical outcomes. In patients with Crohn’s disease, however, there has been no established threshold for mucosal healing based on either the CDEIS or the Simplified Endoscopic Score for Crohn’s disease (SES-CD).

Therefore, Dr. Yzet and her associates identified and reviewed the medical records of 84 consecutive adults with clinically remitted Crohn’s disease who received anti–tumor necrosis factor therapies (infliximab and adalimumab) or vedolizumab at two university hospitals in France between 2008 and 2015. All patients received baseline and follow-up colonoscopies, with results scored on the CDEIS. In all cases, the second CDEIS score was less than 4 (the CDEIS ranges from 0 to 44). The primary outcome was treatment failure, defined as the need for biologic optimization (increasing the dose or shortening the dosing interval of the biologic), corticosteroids, or immunosuppressants; a Harvey-Bradshaw score greater than 4 associated with a change in treatment; or the need for intestinal resection or hospitalization because of Crohn’s disease.

At baseline, 57 patients had CDEIS scores of 0 (complete mucosal healing) and 27 patients had scores greater than 0 but less than 4 (partial mucosal healing). The two groups were otherwise similar except that patients with complete mucosal healing had a shorter median duration of Crohn’s disease (10.3 vs. 15.1 years in the partial healing group; P = .029) and a lower prevalence of Crohn’s disease phenotype B2 (stricturing) according to the Vienna classification (1.8% vs. 14.8%; P = .035). In the multivariate analysis, CDEIS score was the only factor associated with treatment failure (hazard ratio, 2.61; 95% confidence interval, 1.16-5.88; P = .02).

“Our findings suggest that we should be more ambitious in clinical practice to change patients’ life and disease course by achieving complete endoscopic healing. However, this strategy could be limited by the ability of current drugs to achieve complete mucosal healing,” the researchers wrote. “Obtaining a complete mucosal healing would require today a significant need for optimization or change of biologics.”

No external funding sources were reported. Two coinvestigators disclosed ties to AbbVie, Amgen, Biogaran, Biogen, Ferring, Janssen, MSD, Pfizer, Takeda, and several other pharmaceutical companies. The remaining investigators reported having no relevant conflicts of interest.

SOURCE: Yzet C et al. Clin Gastroenterol Hepatol. 2019 Nov 16. doi: 10.1016/j.cgh.2019.11.025.
 

Patients with Crohn’s disease who experienced complete endoscopic healing with biologic therapy had significantly lower subsequent rates of treatment failure, intestinal resection, and hospitalization, compared with patients who experienced only partial mucosal healing, according to the findings of a two-center retrospective study.

Over a median of 4.8 years of follow-up (interquartile range, 2.1-7.2 years) rates of treatment failure were 25% in patients with complete mucosal healing at baseline (that is, a Crohn’s Disease Endoscopic Index of Severity [CDEIS] score of 0) and 48% in patients with partial healing (CDEIS score greater than 0 but less than 4). The difference was statistically significant (P = .045). No patient with a baseline CDEIS score of 0 required intestinal resection, compared with 11% of patients with scores greater than 0 but less than 4 (P = .031). Rates of hospitalization because of Crohn’s disease were 3.5% versus 18.5%, respectively (P = .013). Clara Yzet, MD, of Amiens (France) University Hospital, Université de Picardie Jules Verne, reported the findings together with her associates in Clinical Gastroenterology and Hepatology.

Mucosal healing is a key therapeutic target in Crohn’s disease that has been linked to desirable outcomes, such as steroid-free remission and a lower rate of intestinal resection. However, prior observational studies have inconsistently defined mucosal healing, and clinical trials of biologics have used any of at least seven different definitions, the researchers wrote. Recently, in patients with ulcerative colitis, a Scandinavian Journal of Gastroenterology and another in the Journal of Crohn’s and Colitis linked a stricter definition of mucosal healing (an endoscopic Mayo score of 0, or histologic healing) with superior long-term clinical outcomes. In patients with Crohn’s disease, however, there has been no established threshold for mucosal healing based on either the CDEIS or the Simplified Endoscopic Score for Crohn’s disease (SES-CD).

Therefore, Dr. Yzet and her associates identified and reviewed the medical records of 84 consecutive adults with clinically remitted Crohn’s disease who received anti–tumor necrosis factor therapies (infliximab and adalimumab) or vedolizumab at two university hospitals in France between 2008 and 2015. All patients received baseline and follow-up colonoscopies, with results scored on the CDEIS. In all cases, the second CDEIS score was less than 4 (the CDEIS ranges from 0 to 44). The primary outcome was treatment failure, defined as the need for biologic optimization (increasing the dose or shortening the dosing interval of the biologic), corticosteroids, or immunosuppressants; a Harvey-Bradshaw score greater than 4 associated with a change in treatment; or the need for intestinal resection or hospitalization because of Crohn’s disease.

At baseline, 57 patients had CDEIS scores of 0 (complete mucosal healing) and 27 patients had scores greater than 0 but less than 4 (partial mucosal healing). The two groups were otherwise similar except that patients with complete mucosal healing had a shorter median duration of Crohn’s disease (10.3 vs. 15.1 years in the partial healing group; P = .029) and a lower prevalence of Crohn’s disease phenotype B2 (stricturing) according to the Vienna classification (1.8% vs. 14.8%; P = .035). In the multivariate analysis, CDEIS score was the only factor associated with treatment failure (hazard ratio, 2.61; 95% confidence interval, 1.16-5.88; P = .02).

“Our findings suggest that we should be more ambitious in clinical practice to change patients’ life and disease course by achieving complete endoscopic healing. However, this strategy could be limited by the ability of current drugs to achieve complete mucosal healing,” the researchers wrote. “Obtaining a complete mucosal healing would require today a significant need for optimization or change of biologics.”

No external funding sources were reported. Two coinvestigators disclosed ties to AbbVie, Amgen, Biogaran, Biogen, Ferring, Janssen, MSD, Pfizer, Takeda, and several other pharmaceutical companies. The remaining investigators reported having no relevant conflicts of interest.

SOURCE: Yzet C et al. Clin Gastroenterol Hepatol. 2019 Nov 16. doi: 10.1016/j.cgh.2019.11.025.
 

In individuals with inflammatory bowel disease and primary sclerosing cholangitis, younger age at diagnosis, male sex, and Afro-Caribbean heritage were significant risk factors for liver transplantation and disease-related death, based on a 10-year prospective population-based study.

These factors should be incorporated into the design of clinical trials, models for predicting disease, and studies of prognostic biomarkers for primary sclerosing cholangitis, Palak T. Trivedi, MBBS, MRCP, of the Universty of Birmingham (England) wrote with his associates in Gastroenterology.

The researchers identified newly diagnosed cases from a national health care registry in England between 2006 and 2016 (data on outcomes were collected through mid-2019). In all, 284,560 individuals had a new diagnosis of inflammatory bowel disease, among whom 2,588 also had primary sclerosing cholangitis. The investigators tracked deaths, liver transplantation, colonic resection, cholecystectomy, and diagnoses of colorectal cancer, cholangiosarcoma, and cancers of the pancreas, gallbladder, and liver. They evaluated rates of these outcomes among individuals with both primary sclerosing cholangitis and inflammatory bowel disease (PSC-IBD) and those with IBD only.

After controlling for sex, race, socioeconomic level, comorbidities, and older age, the researchers found that both men and women with PSC-IBD had a significantly greater risk for all-cause mortality, compared with individuals with IBD alone (hazard ratio, 3.20; 95% confidence interval, 3.01-3.40; P less than .001). Strikingly, individuals who were diagnosed with PSC when they were younger than 40 years had a more than sevenfold higher rate of all-cause mortality, compared with individuals with IBD only. In contrast, the incidence rate ratio for individuals diagnosed with PSC when they were older than 60 years was less than 1.5, compared with IBD-only individuals.

Having PSC and ulcerative colitis, being younger when diagnosed with PSC, and being of Afro-Carribean heritage all correlated with higher incidence of liver transplantation or death related to PSC. Individuals with PSC-IBD who were of Afro-Caribbean heritage had an approximately twofold greater risk for liver transplantation or PSC-related death compared with Whites (adjusted HR, 2.05; 95% CI, 1.14-3.70; P = .016). In contrast, women with PSC-IBD were at significantly lower risk for liver transplantation or disease-related death than were men (adjusted HR, 0.74; 95% CI, 0.57-0.97; P = .026).

“The onset of PSC confers heightened risks of all hepatobiliary malignancies, although annual imaging surveillance may associate with a reduced risk of cancer-related death,” the investigators found. Among patients with hepatobiliary cancer, annual imaging was associated with a twofold decrease in risk for cancer-related death (HR, 0.43; 95% CI, 0.23-0.80; P = .037).

Colorectal cancer tended to occur at a younger age among individuals with PSC-IBD, compared with those with IBD alone (median ages at diagnosis, 59 vs. 69 years; P less than .001). Notably, individuals with PSC diagnosed under age 50 years had about a fivefold higher incidence of colorectal cancer than did those with IBD alone, while those diagnosed at older ages had only about a twofold increase. With regard to colectomy, men diagnosed with PSC at younger ages were at the greatest risk, compared with women or individuals diagnosed after age 50 years. Individuals with ulcerative colitis and PSC had a 40% greater risk for colectomy risk than did IBD-only individuals (time-dependent adjusted HR, 1.65; 95% CI, 1.45-1.85; P less than .001).

“Whilst all-cause mortality rates increase with age, younger patients [with PSC] show a disproportionately increased incidence of liver transplantation, PSC-related death, and colorectal cancer,” the researchers concluded. “Consideration of age at diagnosis should therefore be applied in the stratification of patients for future clinical trials, disease prediction models, and prognostic biomarker discovery.”

Dr. Trivedi disclosed support from the National Institute for Health Research Birmingham Biomedical Research Centre, at the University Hospitals Birmingham NHS Foundation Trust and the University of Birmingham. No other disclosures were reported.

SOURCE: Trivedi PJ et al. Gastroenterology. 2020 May 19. doi: 10.1053/j.gastro.2020.05.049.
 

In individuals with inflammatory bowel disease and primary sclerosing cholangitis, younger age at diagnosis, male sex, and Afro-Caribbean heritage were significant risk factors for liver transplantation and disease-related death, based on a 10-year prospective population-based study.

These factors should be incorporated into the design of clinical trials, models for predicting disease, and studies of prognostic biomarkers for primary sclerosing cholangitis, Palak T. Trivedi, MBBS, MRCP, of the Universty of Birmingham (England) wrote with his associates in Gastroenterology.

The researchers identified newly diagnosed cases from a national health care registry in England between 2006 and 2016 (data on outcomes were collected through mid-2019). In all, 284,560 individuals had a new diagnosis of inflammatory bowel disease, among whom 2,588 also had primary sclerosing cholangitis. The investigators tracked deaths, liver transplantation, colonic resection, cholecystectomy, and diagnoses of colorectal cancer, cholangiosarcoma, and cancers of the pancreas, gallbladder, and liver. They evaluated rates of these outcomes among individuals with both primary sclerosing cholangitis and inflammatory bowel disease (PSC-IBD) and those with IBD only.

After controlling for sex, race, socioeconomic level, comorbidities, and older age, the researchers found that both men and women with PSC-IBD had a significantly greater risk for all-cause mortality, compared with individuals with IBD alone (hazard ratio, 3.20; 95% confidence interval, 3.01-3.40; P less than .001). Strikingly, individuals who were diagnosed with PSC when they were younger than 40 years had a more than sevenfold higher rate of all-cause mortality, compared with individuals with IBD only. In contrast, the incidence rate ratio for individuals diagnosed with PSC when they were older than 60 years was less than 1.5, compared with IBD-only individuals.

Having PSC and ulcerative colitis, being younger when diagnosed with PSC, and being of Afro-Carribean heritage all correlated with higher incidence of liver transplantation or death related to PSC. Individuals with PSC-IBD who were of Afro-Caribbean heritage had an approximately twofold greater risk for liver transplantation or PSC-related death compared with Whites (adjusted HR, 2.05; 95% CI, 1.14-3.70; P = .016). In contrast, women with PSC-IBD were at significantly lower risk for liver transplantation or disease-related death than were men (adjusted HR, 0.74; 95% CI, 0.57-0.97; P = .026).

“The onset of PSC confers heightened risks of all hepatobiliary malignancies, although annual imaging surveillance may associate with a reduced risk of cancer-related death,” the investigators found. Among patients with hepatobiliary cancer, annual imaging was associated with a twofold decrease in risk for cancer-related death (HR, 0.43; 95% CI, 0.23-0.80; P = .037).

Colorectal cancer tended to occur at a younger age among individuals with PSC-IBD, compared with those with IBD alone (median ages at diagnosis, 59 vs. 69 years; P less than .001). Notably, individuals with PSC diagnosed under age 50 years had about a fivefold higher incidence of colorectal cancer than did those with IBD alone, while those diagnosed at older ages had only about a twofold increase. With regard to colectomy, men diagnosed with PSC at younger ages were at the greatest risk, compared with women or individuals diagnosed after age 50 years. Individuals with ulcerative colitis and PSC had a 40% greater risk for colectomy risk than did IBD-only individuals (time-dependent adjusted HR, 1.65; 95% CI, 1.45-1.85; P less than .001).

“Whilst all-cause mortality rates increase with age, younger patients [with PSC] show a disproportionately increased incidence of liver transplantation, PSC-related death, and colorectal cancer,” the researchers concluded. “Consideration of age at diagnosis should therefore be applied in the stratification of patients for future clinical trials, disease prediction models, and prognostic biomarker discovery.”

Dr. Trivedi disclosed support from the National Institute for Health Research Birmingham Biomedical Research Centre, at the University Hospitals Birmingham NHS Foundation Trust and the University of Birmingham. No other disclosures were reported.

SOURCE: Trivedi PJ et al. Gastroenterology. 2020 May 19. doi: 10.1053/j.gastro.2020.05.049.
 

In individuals with inflammatory bowel disease and primary sclerosing cholangitis, younger age at diagnosis, male sex, and Afro-Caribbean heritage were significant risk factors for liver transplantation and disease-related death, based on a 10-year prospective population-based study.

These factors should be incorporated into the design of clinical trials, models for predicting disease, and studies of prognostic biomarkers for primary sclerosing cholangitis, Palak T. Trivedi, MBBS, MRCP, of the Universty of Birmingham (England) wrote with his associates in Gastroenterology.

The researchers identified newly diagnosed cases from a national health care registry in England between 2006 and 2016 (data on outcomes were collected through mid-2019). In all, 284,560 individuals had a new diagnosis of inflammatory bowel disease, among whom 2,588 also had primary sclerosing cholangitis. The investigators tracked deaths, liver transplantation, colonic resection, cholecystectomy, and diagnoses of colorectal cancer, cholangiosarcoma, and cancers of the pancreas, gallbladder, and liver. They evaluated rates of these outcomes among individuals with both primary sclerosing cholangitis and inflammatory bowel disease (PSC-IBD) and those with IBD only.

After controlling for sex, race, socioeconomic level, comorbidities, and older age, the researchers found that both men and women with PSC-IBD had a significantly greater risk for all-cause mortality, compared with individuals with IBD alone (hazard ratio, 3.20; 95% confidence interval, 3.01-3.40; P less than .001). Strikingly, individuals who were diagnosed with PSC when they were younger than 40 years had a more than sevenfold higher rate of all-cause mortality, compared with individuals with IBD only. In contrast, the incidence rate ratio for individuals diagnosed with PSC when they were older than 60 years was less than 1.5, compared with IBD-only individuals.

Having PSC and ulcerative colitis, being younger when diagnosed with PSC, and being of Afro-Carribean heritage all correlated with higher incidence of liver transplantation or death related to PSC. Individuals with PSC-IBD who were of Afro-Caribbean heritage had an approximately twofold greater risk for liver transplantation or PSC-related death compared with Whites (adjusted HR, 2.05; 95% CI, 1.14-3.70; P = .016). In contrast, women with PSC-IBD were at significantly lower risk for liver transplantation or disease-related death than were men (adjusted HR, 0.74; 95% CI, 0.57-0.97; P = .026).

“The onset of PSC confers heightened risks of all hepatobiliary malignancies, although annual imaging surveillance may associate with a reduced risk of cancer-related death,” the investigators found. Among patients with hepatobiliary cancer, annual imaging was associated with a twofold decrease in risk for cancer-related death (HR, 0.43; 95% CI, 0.23-0.80; P = .037).

Colorectal cancer tended to occur at a younger age among individuals with PSC-IBD, compared with those with IBD alone (median ages at diagnosis, 59 vs. 69 years; P less than .001). Notably, individuals with PSC diagnosed under age 50 years had about a fivefold higher incidence of colorectal cancer than did those with IBD alone, while those diagnosed at older ages had only about a twofold increase. With regard to colectomy, men diagnosed with PSC at younger ages were at the greatest risk, compared with women or individuals diagnosed after age 50 years. Individuals with ulcerative colitis and PSC had a 40% greater risk for colectomy risk than did IBD-only individuals (time-dependent adjusted HR, 1.65; 95% CI, 1.45-1.85; P less than .001).

“Whilst all-cause mortality rates increase with age, younger patients [with PSC] show a disproportionately increased incidence of liver transplantation, PSC-related death, and colorectal cancer,” the researchers concluded. “Consideration of age at diagnosis should therefore be applied in the stratification of patients for future clinical trials, disease prediction models, and prognostic biomarker discovery.”

Dr. Trivedi disclosed support from the National Institute for Health Research Birmingham Biomedical Research Centre, at the University Hospitals Birmingham NHS Foundation Trust and the University of Birmingham. No other disclosures were reported.

SOURCE: Trivedi PJ et al. Gastroenterology. 2020 May 19. doi: 10.1053/j.gastro.2020.05.049.
 

In heavy drinkers with alcohol-related liver disease, a Markov model based on age, sex, body mass index, and duration and extent of alcohol use predicted risk for disease progression, researchers reported in Clinical Gastroenterology and Hepatology.

The study included 2,334 hospitalized adults with consistently abnormal liver test results who had consumed at least 50 grams of alcohol (about 3.5-4 drinks) per day for the previous 5 years. The model was developed using data from 1,599 individuals with baseline liver biopsies and validated in 735 individuals with no baseline liver biopsies but available data on the presence or absence of hepatic decompensation.

For a 40-year-old man with F0-F2 fibrosis who had been drinking alcohol for 15 years, who drank 150 grams of alcohol daily, and who had a body mass index (BMI) of 22 kg/m², the model predicted a 31.8% likelihood of having a normal liver at baseline, a 61.5% probability of baseline steatosis, and a 6.7% probability of baseline steatohepatitis. In women with the same baseline variables, respective probabilities were 25.1%, 66.5%, and 8.4%. Based on these findings, the 5-year weighted risk for liver complications ranged from 0.2% for men with normal initial liver findings to 10.3% for men with baseline steatohepatitis. Among women, the corresponding risk estimates ranged from 0.5% to 14.7%, wrote PhD student Claire Delacôte of Centre Hospitalier Universitaire de Lille (France), and associates.

“This tool might be used by general practitioners or hepatologists to identify heavy drinkers at high risk for alcohol-related liver disease progression,” the investigators added. “This model might be used to adapt patient care pathways.”

The patients in this study were admitted to the hepatogastroenterology unit of a French hospital between 1982 and 1997. The Markov model incorporated seven stages of alcohol-related liver disease: normal liver (no fibrosis or steatosis), steatosis and F0-F2 fibrosis, alcohol-induced steatohepatitis and F0-F2 fibrosis, steatosis and F3-F4 fibrosis, alcohol-induced steatohepatitis and F3-F4 fibrosis, liver complications without steatohepatitis, and liver complications with alcohol-induced steatohepatitis. Liver complications were defined as hepatocellular carcinoma or liver decompensation (bilirubin >50 mmol/L, gastrointestinal hemorrhage, or ascites). Risk for progressing to liver complications was based on METAVIR score and onset of alcohol-induced steatohepatitis.

The researchers also looked specifically at F3-F4 (severe) fibrosis because of its clinical significance and common use as a study endpoint. Among 40-year-olds with a 15-year history of heavy drinking, the estimated prevalence of alcohol-induced steatohepatitis was 30.0% for men and 33.3% for women. The 5-year risk for liver complications was higher in women (30.1%) than men (24.5%) and was highest among women with baseline alcohol-induced steatohepatitis (41.0%). Overall, women had a 24.8% greater risk for disease progression than men (hazard ratio, 1.248).

Risk for liver complications also increased with age, and each 1-year increase in age at the beginning of heavy drinking heightened the risk for disease progression by 3.8%, regardless of stage of liver disease. “Based on these predictions, 50-year-old women are a high-risk subgroup of [alcohol-related liver] disease progression and should receive close follow-up,” the researchers wrote.

In addition, obese individuals (BMI, 30) had an 11.8% greater risk for progression of alcohol-related liver disease, compared with those with a BMI of 22. Consuming an additional 10 grams of alcohol per day had less impact on risk, the researchers noted.

“If patients are identified as being heavy drinkers by the general practitioner with no evaluation of fibrosis, these patients should be referred to a hepatologist. Nevertheless, we think that the threshold defining the high-risk population, which has been arbitrarily fixed at 5%, should be discussed by experts because it affects the patient’s care pathway. An online application is being developed to help clinicians and general practitioners in their daily practice,” they wrote.

No funding sources were reported. Ms. Delacôte reported having no conflicts of interest. Three coinvestigators disclosed ties to AbbVie, Bayer Healthcare, Eisai, Gilead, MSD, Novartis, Sanofi, and Servier. The others reported having no conflicts.
 

SOURCE: Delacôte C et al. Clin Gastroenterol Hepatol. 2020 Jan 11. doi: 10.1016/j.cgh.2019.12.041.
 

In heavy drinkers with alcohol-related liver disease, a Markov model based on age, sex, body mass index, and duration and extent of alcohol use predicted risk for disease progression, researchers reported in Clinical Gastroenterology and Hepatology.

The study included 2,334 hospitalized adults with consistently abnormal liver test results who had consumed at least 50 grams of alcohol (about 3.5-4 drinks) per day for the previous 5 years. The model was developed using data from 1,599 individuals with baseline liver biopsies and validated in 735 individuals with no baseline liver biopsies but available data on the presence or absence of hepatic decompensation.

For a 40-year-old man with F0-F2 fibrosis who had been drinking alcohol for 15 years, who drank 150 grams of alcohol daily, and who had a body mass index (BMI) of 22 kg/m², the model predicted a 31.8% likelihood of having a normal liver at baseline, a 61.5% probability of baseline steatosis, and a 6.7% probability of baseline steatohepatitis. In women with the same baseline variables, respective probabilities were 25.1%, 66.5%, and 8.4%. Based on these findings, the 5-year weighted risk for liver complications ranged from 0.2% for men with normal initial liver findings to 10.3% for men with baseline steatohepatitis. Among women, the corresponding risk estimates ranged from 0.5% to 14.7%, wrote PhD student Claire Delacôte of Centre Hospitalier Universitaire de Lille (France), and associates.

“This tool might be used by general practitioners or hepatologists to identify heavy drinkers at high risk for alcohol-related liver disease progression,” the investigators added. “This model might be used to adapt patient care pathways.”

The patients in this study were admitted to the hepatogastroenterology unit of a French hospital between 1982 and 1997. The Markov model incorporated seven stages of alcohol-related liver disease: normal liver (no fibrosis or steatosis), steatosis and F0-F2 fibrosis, alcohol-induced steatohepatitis and F0-F2 fibrosis, steatosis and F3-F4 fibrosis, alcohol-induced steatohepatitis and F3-F4 fibrosis, liver complications without steatohepatitis, and liver complications with alcohol-induced steatohepatitis. Liver complications were defined as hepatocellular carcinoma or liver decompensation (bilirubin >50 mmol/L, gastrointestinal hemorrhage, or ascites). Risk for progressing to liver complications was based on METAVIR score and onset of alcohol-induced steatohepatitis.

The researchers also looked specifically at F3-F4 (severe) fibrosis because of its clinical significance and common use as a study endpoint. Among 40-year-olds with a 15-year history of heavy drinking, the estimated prevalence of alcohol-induced steatohepatitis was 30.0% for men and 33.3% for women. The 5-year risk for liver complications was higher in women (30.1%) than men (24.5%) and was highest among women with baseline alcohol-induced steatohepatitis (41.0%). Overall, women had a 24.8% greater risk for disease progression than men (hazard ratio, 1.248).

Risk for liver complications also increased with age, and each 1-year increase in age at the beginning of heavy drinking heightened the risk for disease progression by 3.8%, regardless of stage of liver disease. “Based on these predictions, 50-year-old women are a high-risk subgroup of [alcohol-related liver] disease progression and should receive close follow-up,” the researchers wrote.

In addition, obese individuals (BMI, 30) had an 11.8% greater risk for progression of alcohol-related liver disease, compared with those with a BMI of 22. Consuming an additional 10 grams of alcohol per day had less impact on risk, the researchers noted.

“If patients are identified as being heavy drinkers by the general practitioner with no evaluation of fibrosis, these patients should be referred to a hepatologist. Nevertheless, we think that the threshold defining the high-risk population, which has been arbitrarily fixed at 5%, should be discussed by experts because it affects the patient’s care pathway. An online application is being developed to help clinicians and general practitioners in their daily practice,” they wrote.

No funding sources were reported. Ms. Delacôte reported having no conflicts of interest. Three coinvestigators disclosed ties to AbbVie, Bayer Healthcare, Eisai, Gilead, MSD, Novartis, Sanofi, and Servier. The others reported having no conflicts.
 

SOURCE: Delacôte C et al. Clin Gastroenterol Hepatol. 2020 Jan 11. doi: 10.1016/j.cgh.2019.12.041.
 

In heavy drinkers with alcohol-related liver disease, a Markov model based on age, sex, body mass index, and duration and extent of alcohol use predicted risk for disease progression, researchers reported in Clinical Gastroenterology and Hepatology.

The study included 2,334 hospitalized adults with consistently abnormal liver test results who had consumed at least 50 grams of alcohol (about 3.5-4 drinks) per day for the previous 5 years. The model was developed using data from 1,599 individuals with baseline liver biopsies and validated in 735 individuals with no baseline liver biopsies but available data on the presence or absence of hepatic decompensation.

For a 40-year-old man with F0-F2 fibrosis who had been drinking alcohol for 15 years, who drank 150 grams of alcohol daily, and who had a body mass index (BMI) of 22 kg/m², the model predicted a 31.8% likelihood of having a normal liver at baseline, a 61.5% probability of baseline steatosis, and a 6.7% probability of baseline steatohepatitis. In women with the same baseline variables, respective probabilities were 25.1%, 66.5%, and 8.4%. Based on these findings, the 5-year weighted risk for liver complications ranged from 0.2% for men with normal initial liver findings to 10.3% for men with baseline steatohepatitis. Among women, the corresponding risk estimates ranged from 0.5% to 14.7%, wrote PhD student Claire Delacôte of Centre Hospitalier Universitaire de Lille (France), and associates.

“This tool might be used by general practitioners or hepatologists to identify heavy drinkers at high risk for alcohol-related liver disease progression,” the investigators added. “This model might be used to adapt patient care pathways.”

The patients in this study were admitted to the hepatogastroenterology unit of a French hospital between 1982 and 1997. The Markov model incorporated seven stages of alcohol-related liver disease: normal liver (no fibrosis or steatosis), steatosis and F0-F2 fibrosis, alcohol-induced steatohepatitis and F0-F2 fibrosis, steatosis and F3-F4 fibrosis, alcohol-induced steatohepatitis and F3-F4 fibrosis, liver complications without steatohepatitis, and liver complications with alcohol-induced steatohepatitis. Liver complications were defined as hepatocellular carcinoma or liver decompensation (bilirubin >50 mmol/L, gastrointestinal hemorrhage, or ascites). Risk for progressing to liver complications was based on METAVIR score and onset of alcohol-induced steatohepatitis.

The researchers also looked specifically at F3-F4 (severe) fibrosis because of its clinical significance and common use as a study endpoint. Among 40-year-olds with a 15-year history of heavy drinking, the estimated prevalence of alcohol-induced steatohepatitis was 30.0% for men and 33.3% for women. The 5-year risk for liver complications was higher in women (30.1%) than men (24.5%) and was highest among women with baseline alcohol-induced steatohepatitis (41.0%). Overall, women had a 24.8% greater risk for disease progression than men (hazard ratio, 1.248).

Risk for liver complications also increased with age, and each 1-year increase in age at the beginning of heavy drinking heightened the risk for disease progression by 3.8%, regardless of stage of liver disease. “Based on these predictions, 50-year-old women are a high-risk subgroup of [alcohol-related liver] disease progression and should receive close follow-up,” the researchers wrote.

In addition, obese individuals (BMI, 30) had an 11.8% greater risk for progression of alcohol-related liver disease, compared with those with a BMI of 22. Consuming an additional 10 grams of alcohol per day had less impact on risk, the researchers noted.

“If patients are identified as being heavy drinkers by the general practitioner with no evaluation of fibrosis, these patients should be referred to a hepatologist. Nevertheless, we think that the threshold defining the high-risk population, which has been arbitrarily fixed at 5%, should be discussed by experts because it affects the patient’s care pathway. An online application is being developed to help clinicians and general practitioners in their daily practice,” they wrote.

No funding sources were reported. Ms. Delacôte reported having no conflicts of interest. Three coinvestigators disclosed ties to AbbVie, Bayer Healthcare, Eisai, Gilead, MSD, Novartis, Sanofi, and Servier. The others reported having no conflicts.
 

SOURCE: Delacôte C et al. Clin Gastroenterol Hepatol. 2020 Jan 11. doi: 10.1016/j.cgh.2019.12.041.
 

Among adults who consumed a proinflammatory diet, switching to a diet with lower inflammatory potential was associated with a significant subsequent decrease in risk for Crohn’s disease, according to a study of three longitudinal observational cohorts.

Researchers calculated empirical dietary inflammatory pattern (EDIP) scores based on food-frequency questionnaires completed by 166,903 women and 41,931 men who participated in the Nurses’ Health Study, the Nurses’ Health Study II, and the Health Professionals Follow-up Study. Questionnaires were completed at two time points, separated by 8 years. Overall, adults whose cumulative average EDIP scores fell within the highest quartile – meaning their diets had the highest inflammatory potential – were at 51% greater risk for developing Crohn’s disease than were adults whose diets fell within the lowest EDIP quartile (hazard ratio, 1.51; 95% confidence interval, 1.19-2.07; P = .01).

Strikingly, however, adults who initially consumed a proinflammatory diet (which is high in calories, red meat, high-fat dairy, and refined grains) and then switched to a low-inflammatory diet (one based around fruit, vegetables, legumes, whole grains, fish, and lean protein) had a statistically similar risk for Crohn’s disease as adults who consumed a low-inflammatory diet at both time points. The 95% confidence interval for the hazard ratio crossed 1.0 (HR, 1.51; 95% CI, 0.76-3.00). In contrast, adults who initially consumed a low-inflammatory diet and later changed to a proinflammatory diet were at twofold greater risk for Crohn’s disease than were those who remained on a low-inflammatory diet (HR, 2.05; 95% CI, 1.10-3.79).

These findings accounted for potential confounders, such as age, study cohort, time period, race, smoking, physical activity, and use of oral contraceptives and hormone replacement therapy, wrote Chun-Han Lo, MD, of the Harvard T.H. Chan School of Public Health, Boston, together with his associates in Gastroenterology.

The EDIP score is a weighted sum of 18 food groups that characterizes the potential for dietary inflammation based on circulating concentrations of inflammatory biomarkers. A proinflammatory diet may “trigger the onset of intestinal inflammation by inducing changes in [the] gut microbiome, altering host homeostasis, and regulating T-cell immune response,” the investigators noted.

In this study, which included nearly 5 million person-years of follow-up, 328 individuals were diagnosed with Crohn’s disease and 428 individuals developed ulcerative colitis. Median age at inflammatory bowel disease diagnosis was 55 years, with a range of 29-85 years. Notably, change in EDIP score was not linked to ulcerative colitis risk. Diet may be more relevant in Crohn’s disease than ulcerative colitis, and dietary factors linked to ulcerative colitis were not associated with inflammatory markers in the cohorts and, thus, were not factored into EDIP score, the researchers wrote.

The link between EDIP score and Crohn’s disease in this study did not change after controlling for fiber intake. Red wine (which contains anti-inflammatory resveratrol) might be a protective factor, the researchers hypothesized. They also found that pizza – a processed, calorie-dense food – was significantly inversely linked to inflammatory markers, perhaps because pizza contains abundant lycopene (from tomato paste) and fat (which facilitate lycopene absorption).

Prior studies on diet and inflammatory bowel disease assessed diets at only one time point and categorized dietary habits based on food groups, rather than linking foods with inflammatory markers, the researchers wrote. “Here, by identifying a combination of food groups predictive of circulating markers of inflammation, we provide a more robust evidence base behind the association of these foods with inflammation and inflammatory bowel disease.”

Most study participants were white health professionals. The researchers noted that “studies of dietary risk factors have not revealed a strong ethnicity-specific association, [but] extrapolating our findings to individuals of other ethnicity should be performed with caution.”

The National Institutes of Health, the Beker Foundation, the Chleck Family Foundation, and the Crohn’s and Colitis Foundation provided funding. Three coinvestigators disclosed ties to AbbVie, Bayer Pharma AG, Boehringer Ingelheim, Gilead, Janssen, Kyn Therapeutics, Merck Pfizer, Policy Analysis Inc., and Takeda.

SOURCE: Lo C-H et al. Gastroenterology. 2020 May 1. doi: 10.1053/j.gastro.2020.05.011.
 

Among adults who consumed a proinflammatory diet, switching to a diet with lower inflammatory potential was associated with a significant subsequent decrease in risk for Crohn’s disease, according to a study of three longitudinal observational cohorts.

Researchers calculated empirical dietary inflammatory pattern (EDIP) scores based on food-frequency questionnaires completed by 166,903 women and 41,931 men who participated in the Nurses’ Health Study, the Nurses’ Health Study II, and the Health Professionals Follow-up Study. Questionnaires were completed at two time points, separated by 8 years. Overall, adults whose cumulative average EDIP scores fell within the highest quartile – meaning their diets had the highest inflammatory potential – were at 51% greater risk for developing Crohn’s disease than were adults whose diets fell within the lowest EDIP quartile (hazard ratio, 1.51; 95% confidence interval, 1.19-2.07; P = .01).

Strikingly, however, adults who initially consumed a proinflammatory diet (which is high in calories, red meat, high-fat dairy, and refined grains) and then switched to a low-inflammatory diet (one based around fruit, vegetables, legumes, whole grains, fish, and lean protein) had a statistically similar risk for Crohn’s disease as adults who consumed a low-inflammatory diet at both time points. The 95% confidence interval for the hazard ratio crossed 1.0 (HR, 1.51; 95% CI, 0.76-3.00). In contrast, adults who initially consumed a low-inflammatory diet and later changed to a proinflammatory diet were at twofold greater risk for Crohn’s disease than were those who remained on a low-inflammatory diet (HR, 2.05; 95% CI, 1.10-3.79).

These findings accounted for potential confounders, such as age, study cohort, time period, race, smoking, physical activity, and use of oral contraceptives and hormone replacement therapy, wrote Chun-Han Lo, MD, of the Harvard T.H. Chan School of Public Health, Boston, together with his associates in Gastroenterology.

The EDIP score is a weighted sum of 18 food groups that characterizes the potential for dietary inflammation based on circulating concentrations of inflammatory biomarkers. A proinflammatory diet may “trigger the onset of intestinal inflammation by inducing changes in [the] gut microbiome, altering host homeostasis, and regulating T-cell immune response,” the investigators noted.

In this study, which included nearly 5 million person-years of follow-up, 328 individuals were diagnosed with Crohn’s disease and 428 individuals developed ulcerative colitis. Median age at inflammatory bowel disease diagnosis was 55 years, with a range of 29-85 years. Notably, change in EDIP score was not linked to ulcerative colitis risk. Diet may be more relevant in Crohn’s disease than ulcerative colitis, and dietary factors linked to ulcerative colitis were not associated with inflammatory markers in the cohorts and, thus, were not factored into EDIP score, the researchers wrote.

The link between EDIP score and Crohn’s disease in this study did not change after controlling for fiber intake. Red wine (which contains anti-inflammatory resveratrol) might be a protective factor, the researchers hypothesized. They also found that pizza – a processed, calorie-dense food – was significantly inversely linked to inflammatory markers, perhaps because pizza contains abundant lycopene (from tomato paste) and fat (which facilitate lycopene absorption).

Prior studies on diet and inflammatory bowel disease assessed diets at only one time point and categorized dietary habits based on food groups, rather than linking foods with inflammatory markers, the researchers wrote. “Here, by identifying a combination of food groups predictive of circulating markers of inflammation, we provide a more robust evidence base behind the association of these foods with inflammation and inflammatory bowel disease.”

Most study participants were white health professionals. The researchers noted that “studies of dietary risk factors have not revealed a strong ethnicity-specific association, [but] extrapolating our findings to individuals of other ethnicity should be performed with caution.”

The National Institutes of Health, the Beker Foundation, the Chleck Family Foundation, and the Crohn’s and Colitis Foundation provided funding. Three coinvestigators disclosed ties to AbbVie, Bayer Pharma AG, Boehringer Ingelheim, Gilead, Janssen, Kyn Therapeutics, Merck Pfizer, Policy Analysis Inc., and Takeda.

SOURCE: Lo C-H et al. Gastroenterology. 2020 May 1. doi: 10.1053/j.gastro.2020.05.011.
 

Among adults who consumed a proinflammatory diet, switching to a diet with lower inflammatory potential was associated with a significant subsequent decrease in risk for Crohn’s disease, according to a study of three longitudinal observational cohorts.

Researchers calculated empirical dietary inflammatory pattern (EDIP) scores based on food-frequency questionnaires completed by 166,903 women and 41,931 men who participated in the Nurses’ Health Study, the Nurses’ Health Study II, and the Health Professionals Follow-up Study. Questionnaires were completed at two time points, separated by 8 years. Overall, adults whose cumulative average EDIP scores fell within the highest quartile – meaning their diets had the highest inflammatory potential – were at 51% greater risk for developing Crohn’s disease than were adults whose diets fell within the lowest EDIP quartile (hazard ratio, 1.51; 95% confidence interval, 1.19-2.07; P = .01).

Strikingly, however, adults who initially consumed a proinflammatory diet (which is high in calories, red meat, high-fat dairy, and refined grains) and then switched to a low-inflammatory diet (one based around fruit, vegetables, legumes, whole grains, fish, and lean protein) had a statistically similar risk for Crohn’s disease as adults who consumed a low-inflammatory diet at both time points. The 95% confidence interval for the hazard ratio crossed 1.0 (HR, 1.51; 95% CI, 0.76-3.00). In contrast, adults who initially consumed a low-inflammatory diet and later changed to a proinflammatory diet were at twofold greater risk for Crohn’s disease than were those who remained on a low-inflammatory diet (HR, 2.05; 95% CI, 1.10-3.79).

These findings accounted for potential confounders, such as age, study cohort, time period, race, smoking, physical activity, and use of oral contraceptives and hormone replacement therapy, wrote Chun-Han Lo, MD, of the Harvard T.H. Chan School of Public Health, Boston, together with his associates in Gastroenterology.

The EDIP score is a weighted sum of 18 food groups that characterizes the potential for dietary inflammation based on circulating concentrations of inflammatory biomarkers. A proinflammatory diet may “trigger the onset of intestinal inflammation by inducing changes in [the] gut microbiome, altering host homeostasis, and regulating T-cell immune response,” the investigators noted.

In this study, which included nearly 5 million person-years of follow-up, 328 individuals were diagnosed with Crohn’s disease and 428 individuals developed ulcerative colitis. Median age at inflammatory bowel disease diagnosis was 55 years, with a range of 29-85 years. Notably, change in EDIP score was not linked to ulcerative colitis risk. Diet may be more relevant in Crohn’s disease than ulcerative colitis, and dietary factors linked to ulcerative colitis were not associated with inflammatory markers in the cohorts and, thus, were not factored into EDIP score, the researchers wrote.

The link between EDIP score and Crohn’s disease in this study did not change after controlling for fiber intake. Red wine (which contains anti-inflammatory resveratrol) might be a protective factor, the researchers hypothesized. They also found that pizza – a processed, calorie-dense food – was significantly inversely linked to inflammatory markers, perhaps because pizza contains abundant lycopene (from tomato paste) and fat (which facilitate lycopene absorption).

Prior studies on diet and inflammatory bowel disease assessed diets at only one time point and categorized dietary habits based on food groups, rather than linking foods with inflammatory markers, the researchers wrote. “Here, by identifying a combination of food groups predictive of circulating markers of inflammation, we provide a more robust evidence base behind the association of these foods with inflammation and inflammatory bowel disease.”

Most study participants were white health professionals. The researchers noted that “studies of dietary risk factors have not revealed a strong ethnicity-specific association, [but] extrapolating our findings to individuals of other ethnicity should be performed with caution.”

The National Institutes of Health, the Beker Foundation, the Chleck Family Foundation, and the Crohn’s and Colitis Foundation provided funding. Three coinvestigators disclosed ties to AbbVie, Bayer Pharma AG, Boehringer Ingelheim, Gilead, Janssen, Kyn Therapeutics, Merck Pfizer, Policy Analysis Inc., and Takeda.

SOURCE: Lo C-H et al. Gastroenterology. 2020 May 1. doi: 10.1053/j.gastro.2020.05.011.
 

The American Society for Metabolic & Bariatric Surgery (ASMBS) has issued a statement declaring that obesity surgery is not elective and should be resumed as soon as it›s safe to do so during the COVID-19 pandemic.

The ASMBS statement, “Safer Through Surgery,” was published online in Surgery for Obesity and Related Diseases by the ASMBS executive committee.

It is a reaction to the fact that some U.S. states have placed metabolic and bariatric surgery in the same low-priority category as cosmetic surgery as examples of “elective” procedures that should be among the last to be restarted when pandemic restrictions are eased.

Rather, ASMBS argues, although obesity surgery must be postponed along with other nonemergency procedures when surges in the novel coronavirus make them unsafe, such operations should be resumed as soon as possible along with other medically necessary procedures.

“Metabolic and bariatric surgery is NOT elective. Metabolic and bariatric surgery is medically necessary and the best treatment for those with the life-threatening and life-limiting disease of severe obesity,” the statement says.

And obesity itself is a major risk factor for worse COVID-19 outcomes, ASMBS President Matt Hutter, MD, told Medscape Medical News, noting that individuals with obesity are “more likely to be in [intensive care units].”

“Mortality rates are higher, even in young patients. And [obesity] ... is associated with other comorbidities including diabetes and heart disease...We know the clock is ticking for some folks. For those with early diabetes, the sooner the [bariatric] surgery the more likely it is [for diabetes] to go into remission.”

Because the pandemic may be around for a while, “If we can make people [with obesity] safer ... because they’ve had surgery ... they may be better off,” should they get COVID-19 later, he pointed out.

Hutter noted that the ASMBS recorded a series of webinars, archived on the society’s website, with panels discussing in-depth issues to consider in prioritizing patients when restarting metabolic and bariatric surgery.

There are some differences of opinion, such as whether the sickest patients should be the first to have the surgeries upon reopening, or whether those individuals might be worse off if they contract COVID-19 in the perioperative setting.

“I don’t think there’s a right or wrong answer, but I think we have to figure out what’s right for the individual patient, considering their specific risks of having versus not having surgery, of waiting 1 month, 2 months, or 6 months. One thing we do know is that obesity is a significant disease.”
 

‘Before, during, and after COVID, obesity itself remains an epidemic’

Asked to comment on the ASMBS stance, Obesity Society president Lee M. Kaplan, MD, PhD, sent Medscape Medical News a statement.

“We do not fully understand which aspects of obesity pathophysiology ... are most responsible for the adverse COVID-19 outcomes, nor do we know the degree to which reduced access to care, social isolation, and other social and environmental determinants of health disproportionately affect COVID-19 patients with obesity,” he noted.

“At this early stage, we have not yet determined the impact of weight loss and various types of antiobesity therapies on these risks.”

Nonetheless, Kaplan said, “the extended COVID-19 pandemic underscores the importance of increasing, not diminishing, our commitment to understanding and treating obesity, using all available, evidence-based therapies, including lifestyle modification, antiobesity medications, bariatric surgery, and combinations thereof.”

As all health care delivery is being reorganized around the pandemic, Kaplan added: “Rethinking and changing our approach to obesity needs to be a central feature of this process.

“Before, during, and after COVID, obesity itself remains an epidemic. Its high global prevalence, increasing severity, and profound impact on all aspects of health and disease require that it be addressed more universally within the health care system, with the same commitment afforded to other chronic diseases.”

Obesity treatment isn’t generally considered an emergency, he noted, “because obesity is a chronic disease, whose adverse health effects often accumulate slowly and insidiously. Its generally slow progression allows for careful and coordinated care planning, and advanced scheduling of therapeutic interventions, including surgery. These characteristics, however, should not lead us to infer that treating obesity itself is optional.”

Hutter has reported receiving honoraria from Ethicon and Medtronic, and is a consultant for Vicarious Surgical and Sigilon Therapeutics. Kaplan has reported consulting for Boehringer Ingelheim, Fractyl, Gelesis, GI Dynamics, Johnson & Johnson, Novo Nordisk, Pfizer, Rhythm Pharmaceuticals, the National Institutes of Health, and the Department of State.

The AGA Practice guide on Obesity and Weight management, Education and Resources (POWER) white paper provides physicians with a comprehensive, multi-disciplinary process to guide and personalize innovative obesity care for safe and effective weight management. Learn more at www.gastro.org/obesity. 

This article first appeared on Medscape.com.

The American Society for Metabolic & Bariatric Surgery (ASMBS) has issued a statement declaring that obesity surgery is not elective and should be resumed as soon as it›s safe to do so during the COVID-19 pandemic.

The ASMBS statement, “Safer Through Surgery,” was published online in Surgery for Obesity and Related Diseases by the ASMBS executive committee.

It is a reaction to the fact that some U.S. states have placed metabolic and bariatric surgery in the same low-priority category as cosmetic surgery as examples of “elective” procedures that should be among the last to be restarted when pandemic restrictions are eased.

Rather, ASMBS argues, although obesity surgery must be postponed along with other nonemergency procedures when surges in the novel coronavirus make them unsafe, such operations should be resumed as soon as possible along with other medically necessary procedures.

“Metabolic and bariatric surgery is NOT elective. Metabolic and bariatric surgery is medically necessary and the best treatment for those with the life-threatening and life-limiting disease of severe obesity,” the statement says.

And obesity itself is a major risk factor for worse COVID-19 outcomes, ASMBS President Matt Hutter, MD, told Medscape Medical News, noting that individuals with obesity are “more likely to be in [intensive care units].”

“Mortality rates are higher, even in young patients. And [obesity] ... is associated with other comorbidities including diabetes and heart disease...We know the clock is ticking for some folks. For those with early diabetes, the sooner the [bariatric] surgery the more likely it is [for diabetes] to go into remission.”

Because the pandemic may be around for a while, “If we can make people [with obesity] safer ... because they’ve had surgery ... they may be better off,” should they get COVID-19 later, he pointed out.

Hutter noted that the ASMBS recorded a series of webinars, archived on the society’s website, with panels discussing in-depth issues to consider in prioritizing patients when restarting metabolic and bariatric surgery.

There are some differences of opinion, such as whether the sickest patients should be the first to have the surgeries upon reopening, or whether those individuals might be worse off if they contract COVID-19 in the perioperative setting.

“I don’t think there’s a right or wrong answer, but I think we have to figure out what’s right for the individual patient, considering their specific risks of having versus not having surgery, of waiting 1 month, 2 months, or 6 months. One thing we do know is that obesity is a significant disease.”
 

‘Before, during, and after COVID, obesity itself remains an epidemic’

Asked to comment on the ASMBS stance, Obesity Society president Lee M. Kaplan, MD, PhD, sent Medscape Medical News a statement.

“We do not fully understand which aspects of obesity pathophysiology ... are most responsible for the adverse COVID-19 outcomes, nor do we know the degree to which reduced access to care, social isolation, and other social and environmental determinants of health disproportionately affect COVID-19 patients with obesity,” he noted.

“At this early stage, we have not yet determined the impact of weight loss and various types of antiobesity therapies on these risks.”

Nonetheless, Kaplan said, “the extended COVID-19 pandemic underscores the importance of increasing, not diminishing, our commitment to understanding and treating obesity, using all available, evidence-based therapies, including lifestyle modification, antiobesity medications, bariatric surgery, and combinations thereof.”

As all health care delivery is being reorganized around the pandemic, Kaplan added: “Rethinking and changing our approach to obesity needs to be a central feature of this process.

“Before, during, and after COVID, obesity itself remains an epidemic. Its high global prevalence, increasing severity, and profound impact on all aspects of health and disease require that it be addressed more universally within the health care system, with the same commitment afforded to other chronic diseases.”

Obesity treatment isn’t generally considered an emergency, he noted, “because obesity is a chronic disease, whose adverse health effects often accumulate slowly and insidiously. Its generally slow progression allows for careful and coordinated care planning, and advanced scheduling of therapeutic interventions, including surgery. These characteristics, however, should not lead us to infer that treating obesity itself is optional.”

Hutter has reported receiving honoraria from Ethicon and Medtronic, and is a consultant for Vicarious Surgical and Sigilon Therapeutics. Kaplan has reported consulting for Boehringer Ingelheim, Fractyl, Gelesis, GI Dynamics, Johnson & Johnson, Novo Nordisk, Pfizer, Rhythm Pharmaceuticals, the National Institutes of Health, and the Department of State.

The AGA Practice guide on Obesity and Weight management, Education and Resources (POWER) white paper provides physicians with a comprehensive, multi-disciplinary process to guide and personalize innovative obesity care for safe and effective weight management. Learn more at www.gastro.org/obesity. 

This article first appeared on Medscape.com.

The American Society for Metabolic & Bariatric Surgery (ASMBS) has issued a statement declaring that obesity surgery is not elective and should be resumed as soon as it›s safe to do so during the COVID-19 pandemic.

The ASMBS statement, “Safer Through Surgery,” was published online in Surgery for Obesity and Related Diseases by the ASMBS executive committee.

It is a reaction to the fact that some U.S. states have placed metabolic and bariatric surgery in the same low-priority category as cosmetic surgery as examples of “elective” procedures that should be among the last to be restarted when pandemic restrictions are eased.

Rather, ASMBS argues, although obesity surgery must be postponed along with other nonemergency procedures when surges in the novel coronavirus make them unsafe, such operations should be resumed as soon as possible along with other medically necessary procedures.

“Metabolic and bariatric surgery is NOT elective. Metabolic and bariatric surgery is medically necessary and the best treatment for those with the life-threatening and life-limiting disease of severe obesity,” the statement says.

And obesity itself is a major risk factor for worse COVID-19 outcomes, ASMBS President Matt Hutter, MD, told Medscape Medical News, noting that individuals with obesity are “more likely to be in [intensive care units].”

“Mortality rates are higher, even in young patients. And [obesity] ... is associated with other comorbidities including diabetes and heart disease...We know the clock is ticking for some folks. For those with early diabetes, the sooner the [bariatric] surgery the more likely it is [for diabetes] to go into remission.”

Because the pandemic may be around for a while, “If we can make people [with obesity] safer ... because they’ve had surgery ... they may be better off,” should they get COVID-19 later, he pointed out.

Hutter noted that the ASMBS recorded a series of webinars, archived on the society’s website, with panels discussing in-depth issues to consider in prioritizing patients when restarting metabolic and bariatric surgery.

There are some differences of opinion, such as whether the sickest patients should be the first to have the surgeries upon reopening, or whether those individuals might be worse off if they contract COVID-19 in the perioperative setting.

“I don’t think there’s a right or wrong answer, but I think we have to figure out what’s right for the individual patient, considering their specific risks of having versus not having surgery, of waiting 1 month, 2 months, or 6 months. One thing we do know is that obesity is a significant disease.”
 

‘Before, during, and after COVID, obesity itself remains an epidemic’

Asked to comment on the ASMBS stance, Obesity Society president Lee M. Kaplan, MD, PhD, sent Medscape Medical News a statement.

“We do not fully understand which aspects of obesity pathophysiology ... are most responsible for the adverse COVID-19 outcomes, nor do we know the degree to which reduced access to care, social isolation, and other social and environmental determinants of health disproportionately affect COVID-19 patients with obesity,” he noted.

“At this early stage, we have not yet determined the impact of weight loss and various types of antiobesity therapies on these risks.”

Nonetheless, Kaplan said, “the extended COVID-19 pandemic underscores the importance of increasing, not diminishing, our commitment to understanding and treating obesity, using all available, evidence-based therapies, including lifestyle modification, antiobesity medications, bariatric surgery, and combinations thereof.”

As all health care delivery is being reorganized around the pandemic, Kaplan added: “Rethinking and changing our approach to obesity needs to be a central feature of this process.

“Before, during, and after COVID, obesity itself remains an epidemic. Its high global prevalence, increasing severity, and profound impact on all aspects of health and disease require that it be addressed more universally within the health care system, with the same commitment afforded to other chronic diseases.”

Obesity treatment isn’t generally considered an emergency, he noted, “because obesity is a chronic disease, whose adverse health effects often accumulate slowly and insidiously. Its generally slow progression allows for careful and coordinated care planning, and advanced scheduling of therapeutic interventions, including surgery. These characteristics, however, should not lead us to infer that treating obesity itself is optional.”

Hutter has reported receiving honoraria from Ethicon and Medtronic, and is a consultant for Vicarious Surgical and Sigilon Therapeutics. Kaplan has reported consulting for Boehringer Ingelheim, Fractyl, Gelesis, GI Dynamics, Johnson & Johnson, Novo Nordisk, Pfizer, Rhythm Pharmaceuticals, the National Institutes of Health, and the Department of State.

The AGA Practice guide on Obesity and Weight management, Education and Resources (POWER) white paper provides physicians with a comprehensive, multi-disciplinary process to guide and personalize innovative obesity care for safe and effective weight management. Learn more at www.gastro.org/obesity. 

This article first appeared on Medscape.com.

Women have a lower risk of nonalcoholic fatty liver disease compared with men, but those who do develop the disease are significantly more likely than are men to develop advanced fibrosis, according to data from a meta-analysis of more than 62,000 individuals.

Sex disparity persists in most chronic liver diseases, with more cases and risk of progression reported in men, but the effect of sex on nonalcoholic fatty liver disease (NAFLD) remains unclear, wrote Maya Balakrishnan, MD, of Baylor College of Medicine, Houston, and colleagues. “Knowing whether and how [sex] influences the risk and severity of NAFLD is important for risk stratification, risk modification as well as prognostication,” they said.

In a study published in Clinical Gastroenterology and Hepatology, the researchers conducted a review and meta-analysis of 54 studies, including data from 62,239 patients with NAFLD, 5,428 with nonalcoholic steatohepatitis (NASH), and 6,444 with advanced NAFLD fibrosis.

Overall, women had a 19% lower risk of developing NAFLD compared with men (pooled risk ratio 0.81), a similar risk to men of developing NASH (RR, 1.00), and a 37% increased risk of advanced fibrosis (RR, 1.37) compared with men.

The risk of more severe disease in women increased with age. Among women aged 50 years and older, the risks of NASH and advanced fibrosis were significantly higher, at 17% and 56%, respectively (RR, 1.17 and RR, 1.56). The sex-specific prevalence of advanced fibrosis was not significantly different in patients younger than 50 years.

“Our findings of an increased prevalence of severe phenotypes of NAFLD – NASH and advanced fibrosis – among older women fits well into the current understanding of disease pathogenesis,” the researchers noted.

The findings were limited by several factors, including the cross-sectional nature and heterogeneity of the included studies and lack of data on possible contributions to NASH and NAFLD such as polycystic ovarian syndrome, cumulative use of hormone therapy, and pregnancy, the researchers noted.

However, the results were strengthened by the large patient population. “Given the higher risk of advanced fibrosis observed among women compared to men with NAFLD in our meta-analysis, it is plausible that cirrhosis and its complications may occur with greater frequency among women than in men,” the researchers said. Consequently, women older than 50 years with NAFLD should be evaluated frequently for advanced disease, they noted. In addition, “more focused and intensified efforts may be warranted to target lifestyle modifications and weight loss among young women with NAFLD, particularly in the presence of NASH and/or advanced fibrosis,” the researchers concluded.

Conducting the study at this time was important because of conjectures of sex-based differences in NAFLD prevalence and NAFLD progression, Dr. Balakrishnan said in an interview. “However, the findings from studies conducted across different study populations have been disparate. Therefore, it was important to perform a systematic review and meta-analysis to determine whether there are differences in NAFLD and NAFLD severity risk between the [sexes],” she said.

Dr. Balakrishnan said she was surprised by the higher risk of severe NASH fibrosis in women compared with men once NAFLD is established. “This was surprising and sets NAFLD apart from other highly prevalent chronic liver disease etiologies,” she said. “Other common liver diseases, for example hepatitis B and hepatitis C, tend to be more common among men and tend to progress more rapidly, and tend to be more severe among men compared to women,” she noted.

The take-home message for clinicians is that NAFLD is at least equally, if not more, aggressive in women compared with men, and should be evaluated with equal aggressiveness, Dr. Balakrishnan emphasized. “Moreover, in the future we may expect to see the burden of cirrhosis distributed more equally among women and men than we have to date. This has implications for liver disease screening and women’s health,” she said. The next steps for research are to determine the specific reasons for the higher risk of NAFLD fibrosis in women compared with men, she added.

The study was supported in part by the National Institutes of Health. The researchers had no financial conflicts to disclose.

SOURCE: Balakrishnan M et al. Clin Gastroenterol Hepatol. 2020 Apr 30. doi: 10.1016/j.cgh.2020.04.067.

AGA offers education on the latest challenges, trends and solutions for diagnosing and managing nonalcoholic steatohepatitis (NASH) and nonalcoholic fatty liver disease (NAFLD) at http://ow.ly/Bz1Q30qYMw0. Help your patients better understand their risk of NASH and NAFLD by sharing AGA patient education at http://ow.ly/GoY630qYOmY.

Women have a lower risk of nonalcoholic fatty liver disease compared with men, but those who do develop the disease are significantly more likely than are men to develop advanced fibrosis, according to data from a meta-analysis of more than 62,000 individuals.

Sex disparity persists in most chronic liver diseases, with more cases and risk of progression reported in men, but the effect of sex on nonalcoholic fatty liver disease (NAFLD) remains unclear, wrote Maya Balakrishnan, MD, of Baylor College of Medicine, Houston, and colleagues. “Knowing whether and how [sex] influences the risk and severity of NAFLD is important for risk stratification, risk modification as well as prognostication,” they said.

In a study published in Clinical Gastroenterology and Hepatology, the researchers conducted a review and meta-analysis of 54 studies, including data from 62,239 patients with NAFLD, 5,428 with nonalcoholic steatohepatitis (NASH), and 6,444 with advanced NAFLD fibrosis.

Overall, women had a 19% lower risk of developing NAFLD compared with men (pooled risk ratio 0.81), a similar risk to men of developing NASH (RR, 1.00), and a 37% increased risk of advanced fibrosis (RR, 1.37) compared with men.

The risk of more severe disease in women increased with age. Among women aged 50 years and older, the risks of NASH and advanced fibrosis were significantly higher, at 17% and 56%, respectively (RR, 1.17 and RR, 1.56). The sex-specific prevalence of advanced fibrosis was not significantly different in patients younger than 50 years.

“Our findings of an increased prevalence of severe phenotypes of NAFLD – NASH and advanced fibrosis – among older women fits well into the current understanding of disease pathogenesis,” the researchers noted.

The findings were limited by several factors, including the cross-sectional nature and heterogeneity of the included studies and lack of data on possible contributions to NASH and NAFLD such as polycystic ovarian syndrome, cumulative use of hormone therapy, and pregnancy, the researchers noted.

However, the results were strengthened by the large patient population. “Given the higher risk of advanced fibrosis observed among women compared to men with NAFLD in our meta-analysis, it is plausible that cirrhosis and its complications may occur with greater frequency among women than in men,” the researchers said. Consequently, women older than 50 years with NAFLD should be evaluated frequently for advanced disease, they noted. In addition, “more focused and intensified efforts may be warranted to target lifestyle modifications and weight loss among young women with NAFLD, particularly in the presence of NASH and/or advanced fibrosis,” the researchers concluded.

Conducting the study at this time was important because of conjectures of sex-based differences in NAFLD prevalence and NAFLD progression, Dr. Balakrishnan said in an interview. “However, the findings from studies conducted across different study populations have been disparate. Therefore, it was important to perform a systematic review and meta-analysis to determine whether there are differences in NAFLD and NAFLD severity risk between the [sexes],” she said.

Dr. Balakrishnan said she was surprised by the higher risk of severe NASH fibrosis in women compared with men once NAFLD is established. “This was surprising and sets NAFLD apart from other highly prevalent chronic liver disease etiologies,” she said. “Other common liver diseases, for example hepatitis B and hepatitis C, tend to be more common among men and tend to progress more rapidly, and tend to be more severe among men compared to women,” she noted.

The take-home message for clinicians is that NAFLD is at least equally, if not more, aggressive in women compared with men, and should be evaluated with equal aggressiveness, Dr. Balakrishnan emphasized. “Moreover, in the future we may expect to see the burden of cirrhosis distributed more equally among women and men than we have to date. This has implications for liver disease screening and women’s health,” she said. The next steps for research are to determine the specific reasons for the higher risk of NAFLD fibrosis in women compared with men, she added.

The study was supported in part by the National Institutes of Health. The researchers had no financial conflicts to disclose.

SOURCE: Balakrishnan M et al. Clin Gastroenterol Hepatol. 2020 Apr 30. doi: 10.1016/j.cgh.2020.04.067.

AGA offers education on the latest challenges, trends and solutions for diagnosing and managing nonalcoholic steatohepatitis (NASH) and nonalcoholic fatty liver disease (NAFLD) at http://ow.ly/Bz1Q30qYMw0. Help your patients better understand their risk of NASH and NAFLD by sharing AGA patient education at http://ow.ly/GoY630qYOmY.

Women have a lower risk of nonalcoholic fatty liver disease compared with men, but those who do develop the disease are significantly more likely than are men to develop advanced fibrosis, according to data from a meta-analysis of more than 62,000 individuals.

Sex disparity persists in most chronic liver diseases, with more cases and risk of progression reported in men, but the effect of sex on nonalcoholic fatty liver disease (NAFLD) remains unclear, wrote Maya Balakrishnan, MD, of Baylor College of Medicine, Houston, and colleagues. “Knowing whether and how [sex] influences the risk and severity of NAFLD is important for risk stratification, risk modification as well as prognostication,” they said.

In a study published in Clinical Gastroenterology and Hepatology, the researchers conducted a review and meta-analysis of 54 studies, including data from 62,239 patients with NAFLD, 5,428 with nonalcoholic steatohepatitis (NASH), and 6,444 with advanced NAFLD fibrosis.

Overall, women had a 19% lower risk of developing NAFLD compared with men (pooled risk ratio 0.81), a similar risk to men of developing NASH (RR, 1.00), and a 37% increased risk of advanced fibrosis (RR, 1.37) compared with men.

The risk of more severe disease in women increased with age. Among women aged 50 years and older, the risks of NASH and advanced fibrosis were significantly higher, at 17% and 56%, respectively (RR, 1.17 and RR, 1.56). The sex-specific prevalence of advanced fibrosis was not significantly different in patients younger than 50 years.

“Our findings of an increased prevalence of severe phenotypes of NAFLD – NASH and advanced fibrosis – among older women fits well into the current understanding of disease pathogenesis,” the researchers noted.

The findings were limited by several factors, including the cross-sectional nature and heterogeneity of the included studies and lack of data on possible contributions to NASH and NAFLD such as polycystic ovarian syndrome, cumulative use of hormone therapy, and pregnancy, the researchers noted.

However, the results were strengthened by the large patient population. “Given the higher risk of advanced fibrosis observed among women compared to men with NAFLD in our meta-analysis, it is plausible that cirrhosis and its complications may occur with greater frequency among women than in men,” the researchers said. Consequently, women older than 50 years with NAFLD should be evaluated frequently for advanced disease, they noted. In addition, “more focused and intensified efforts may be warranted to target lifestyle modifications and weight loss among young women with NAFLD, particularly in the presence of NASH and/or advanced fibrosis,” the researchers concluded.

Conducting the study at this time was important because of conjectures of sex-based differences in NAFLD prevalence and NAFLD progression, Dr. Balakrishnan said in an interview. “However, the findings from studies conducted across different study populations have been disparate. Therefore, it was important to perform a systematic review and meta-analysis to determine whether there are differences in NAFLD and NAFLD severity risk between the [sexes],” she said.

Dr. Balakrishnan said she was surprised by the higher risk of severe NASH fibrosis in women compared with men once NAFLD is established. “This was surprising and sets NAFLD apart from other highly prevalent chronic liver disease etiologies,” she said. “Other common liver diseases, for example hepatitis B and hepatitis C, tend to be more common among men and tend to progress more rapidly, and tend to be more severe among men compared to women,” she noted.

The take-home message for clinicians is that NAFLD is at least equally, if not more, aggressive in women compared with men, and should be evaluated with equal aggressiveness, Dr. Balakrishnan emphasized. “Moreover, in the future we may expect to see the burden of cirrhosis distributed more equally among women and men than we have to date. This has implications for liver disease screening and women’s health,” she said. The next steps for research are to determine the specific reasons for the higher risk of NAFLD fibrosis in women compared with men, she added.

The study was supported in part by the National Institutes of Health. The researchers had no financial conflicts to disclose.

SOURCE: Balakrishnan M et al. Clin Gastroenterol Hepatol. 2020 Apr 30. doi: 10.1016/j.cgh.2020.04.067.

AGA offers education on the latest challenges, trends and solutions for diagnosing and managing nonalcoholic steatohepatitis (NASH) and nonalcoholic fatty liver disease (NAFLD) at http://ow.ly/Bz1Q30qYMw0. Help your patients better understand their risk of NASH and NAFLD by sharing AGA patient education at http://ow.ly/GoY630qYOmY.

Among nonsecretors – individuals who express a less diverse array of fucosylated histoblood group antigen carbohydrates (HBGAs) and consequently are less susceptible to some norovirus strains – natural infection with norovirus strain GII.2 induced cellular and antibody immunity that lasted for at least 30 days for T cells, monocytes, and dendritic cells and for at least 180 days for blocking antibodies, researchers reported.

“Multiple cellular lineages expressing interferon-gamma and tumor necrosis factor [TNF]–alpha dominated the response. Both T-cell and B-cell responses were cross-reactive with other GII strains, but not GI strains,” Lisa C. Lindesmith of the University of North Carolina, Chapel Hill, and her associates wrote in Cellular and Molecular Gastroenterology and Hepatology. The researchers also found that bile salts enable GII.2 to bind HBGAs produced by nonsecretors. “[I]n addition to HBGAs, one or more specific components of bile also is likely to be an essential co-factor for human norovirus attachment and infection,” the researchers wrote.

Susceptibility to norovirus depends on whether individuals express secretor enzyme, which is encoded by the FUT2 gene. Nonsecretors (who are FUT2–/–) express less varied HBGA, are susceptible to fewer norovirus strains, and are resistant to the predominant norovirus strain, GII.4. “Because future human norovirus vaccines will comprise GII.4 antigen, and because secretor phenotype impacts GII.4 infection and immunity, nonsecretors may mimic young children immunologically in response to GII.4 vaccination,” the researchers explained. But until now, most vaccines have focused on adult secretors, they said.

Their study focused on a familial norovirus outbreak in Chapel Hill that was the first to be characterized among nonsecretors who were naturally infected with norovirus GII.2. Four adults provided blood samples, and one provided a stool sample from which the researchers isolated and cloned the G11.2 capsid gene sequence. They used neutralization assays to study serologic immunity and flow cytometry to assess cellular activation and cytokine production in blood samples from the four cases and from seven healthy donors.

Norovirus GII.2 infection activated both innate and adaptive immunity and typical production of antiviral helper T cell (Th)1 and Th2 cytokines. The cellular immune response lasted at least 30 days, “long after symptom resolution,” the investigators wrote.

Compared with healthy donors, blood specimens from infected nonsecretors showed increases in non-class-switched memory, transitional B cells, and plasmablast B cells, and both naive and memory B cells also were positive for activation markers for at least 30 days after infection. Activated interferon-gamma+ T cells, natural killer cells, TNF-alpha+ monocytes, IL-10+, TNF-alpha+ myeloid dendritic cells, and TNF plasmacytoid dendritic cells also persisted for at least 30 days. Cross-reactive GII immunity was evident for at least 180 days. “GII.2 infection boosted cross-reactive blocking antibodies to GII.3, GII.14, and GII.17, as well as T-cell responses to GII.4, despite the lack of clear serologic evidence of previous GII.4 exposure,” the investigators wrote.

Based on prior reports that bile enhances norovirus growth or ligand binding, they inoculated specimens with chenodeoxycholic acid (CDCA) and glycochenodeoxycholic acid (GCDCA), pig bile, ox bile, or human bile. “Strikingly, the addition of bile enabled GII.2 Chapel Hill outbreak virus-like particle to bind to saliva from the four nonsecretor donors,” the researchers wrote. Bile acids “may override the genetic advantage of less-diverse HBGA expression in nonsecretors by improving the avidity of GII.2 binding to nonsecretor HBGAs, potentially paving the way for infection.” However, bile salts did not enable the GII.2 strain to replicate in human intestinal enteroid cells, which suggests that additional factors play into how norovirus enters human cells, according to the researchers.

The findings, they wrote, “support development of within-genogroup, cross-reactive antibody and T-cell immunity, key outcomes that may provide the foundation for eliciting broad immune responses after GII.4 vaccination in individuals with limited GII.4 immunity, including young children.”

The National Institutes of Health, the Wellcome Trust, the Centers for Disease Control and Prevention, and a Cancer Center Core support provided funding. Ms. Lindesmith and her associates reported having no relevant conflicts of interest.
 

SOURCE: Lindesmith LC et al. Cell Molec Gastroenterol Hepatol. 2020;10:245-67.
 

Among nonsecretors – individuals who express a less diverse array of fucosylated histoblood group antigen carbohydrates (HBGAs) and consequently are less susceptible to some norovirus strains – natural infection with norovirus strain GII.2 induced cellular and antibody immunity that lasted for at least 30 days for T cells, monocytes, and dendritic cells and for at least 180 days for blocking antibodies, researchers reported.

“Multiple cellular lineages expressing interferon-gamma and tumor necrosis factor [TNF]–alpha dominated the response. Both T-cell and B-cell responses were cross-reactive with other GII strains, but not GI strains,” Lisa C. Lindesmith of the University of North Carolina, Chapel Hill, and her associates wrote in Cellular and Molecular Gastroenterology and Hepatology. The researchers also found that bile salts enable GII.2 to bind HBGAs produced by nonsecretors. “[I]n addition to HBGAs, one or more specific components of bile also is likely to be an essential co-factor for human norovirus attachment and infection,” the researchers wrote.

Susceptibility to norovirus depends on whether individuals express secretor enzyme, which is encoded by the FUT2 gene. Nonsecretors (who are FUT2–/–) express less varied HBGA, are susceptible to fewer norovirus strains, and are resistant to the predominant norovirus strain, GII.4. “Because future human norovirus vaccines will comprise GII.4 antigen, and because secretor phenotype impacts GII.4 infection and immunity, nonsecretors may mimic young children immunologically in response to GII.4 vaccination,” the researchers explained. But until now, most vaccines have focused on adult secretors, they said.

Their study focused on a familial norovirus outbreak in Chapel Hill that was the first to be characterized among nonsecretors who were naturally infected with norovirus GII.2. Four adults provided blood samples, and one provided a stool sample from which the researchers isolated and cloned the G11.2 capsid gene sequence. They used neutralization assays to study serologic immunity and flow cytometry to assess cellular activation and cytokine production in blood samples from the four cases and from seven healthy donors.

Norovirus GII.2 infection activated both innate and adaptive immunity and typical production of antiviral helper T cell (Th)1 and Th2 cytokines. The cellular immune response lasted at least 30 days, “long after symptom resolution,” the investigators wrote.

Compared with healthy donors, blood specimens from infected nonsecretors showed increases in non-class-switched memory, transitional B cells, and plasmablast B cells, and both naive and memory B cells also were positive for activation markers for at least 30 days after infection. Activated interferon-gamma+ T cells, natural killer cells, TNF-alpha+ monocytes, IL-10+, TNF-alpha+ myeloid dendritic cells, and TNF plasmacytoid dendritic cells also persisted for at least 30 days. Cross-reactive GII immunity was evident for at least 180 days. “GII.2 infection boosted cross-reactive blocking antibodies to GII.3, GII.14, and GII.17, as well as T-cell responses to GII.4, despite the lack of clear serologic evidence of previous GII.4 exposure,” the investigators wrote.

Based on prior reports that bile enhances norovirus growth or ligand binding, they inoculated specimens with chenodeoxycholic acid (CDCA) and glycochenodeoxycholic acid (GCDCA), pig bile, ox bile, or human bile. “Strikingly, the addition of bile enabled GII.2 Chapel Hill outbreak virus-like particle to bind to saliva from the four nonsecretor donors,” the researchers wrote. Bile acids “may override the genetic advantage of less-diverse HBGA expression in nonsecretors by improving the avidity of GII.2 binding to nonsecretor HBGAs, potentially paving the way for infection.” However, bile salts did not enable the GII.2 strain to replicate in human intestinal enteroid cells, which suggests that additional factors play into how norovirus enters human cells, according to the researchers.

The findings, they wrote, “support development of within-genogroup, cross-reactive antibody and T-cell immunity, key outcomes that may provide the foundation for eliciting broad immune responses after GII.4 vaccination in individuals with limited GII.4 immunity, including young children.”

The National Institutes of Health, the Wellcome Trust, the Centers for Disease Control and Prevention, and a Cancer Center Core support provided funding. Ms. Lindesmith and her associates reported having no relevant conflicts of interest.
 

SOURCE: Lindesmith LC et al. Cell Molec Gastroenterol Hepatol. 2020;10:245-67.
 

Among nonsecretors – individuals who express a less diverse array of fucosylated histoblood group antigen carbohydrates (HBGAs) and consequently are less susceptible to some norovirus strains – natural infection with norovirus strain GII.2 induced cellular and antibody immunity that lasted for at least 30 days for T cells, monocytes, and dendritic cells and for at least 180 days for blocking antibodies, researchers reported.

“Multiple cellular lineages expressing interferon-gamma and tumor necrosis factor [TNF]–alpha dominated the response. Both T-cell and B-cell responses were cross-reactive with other GII strains, but not GI strains,” Lisa C. Lindesmith of the University of North Carolina, Chapel Hill, and her associates wrote in Cellular and Molecular Gastroenterology and Hepatology. The researchers also found that bile salts enable GII.2 to bind HBGAs produced by nonsecretors. “[I]n addition to HBGAs, one or more specific components of bile also is likely to be an essential co-factor for human norovirus attachment and infection,” the researchers wrote.

Susceptibility to norovirus depends on whether individuals express secretor enzyme, which is encoded by the FUT2 gene. Nonsecretors (who are FUT2–/–) express less varied HBGA, are susceptible to fewer norovirus strains, and are resistant to the predominant norovirus strain, GII.4. “Because future human norovirus vaccines will comprise GII.4 antigen, and because secretor phenotype impacts GII.4 infection and immunity, nonsecretors may mimic young children immunologically in response to GII.4 vaccination,” the researchers explained. But until now, most vaccines have focused on adult secretors, they said.

Their study focused on a familial norovirus outbreak in Chapel Hill that was the first to be characterized among nonsecretors who were naturally infected with norovirus GII.2. Four adults provided blood samples, and one provided a stool sample from which the researchers isolated and cloned the G11.2 capsid gene sequence. They used neutralization assays to study serologic immunity and flow cytometry to assess cellular activation and cytokine production in blood samples from the four cases and from seven healthy donors.

Norovirus GII.2 infection activated both innate and adaptive immunity and typical production of antiviral helper T cell (Th)1 and Th2 cytokines. The cellular immune response lasted at least 30 days, “long after symptom resolution,” the investigators wrote.

Compared with healthy donors, blood specimens from infected nonsecretors showed increases in non-class-switched memory, transitional B cells, and plasmablast B cells, and both naive and memory B cells also were positive for activation markers for at least 30 days after infection. Activated interferon-gamma+ T cells, natural killer cells, TNF-alpha+ monocytes, IL-10+, TNF-alpha+ myeloid dendritic cells, and TNF plasmacytoid dendritic cells also persisted for at least 30 days. Cross-reactive GII immunity was evident for at least 180 days. “GII.2 infection boosted cross-reactive blocking antibodies to GII.3, GII.14, and GII.17, as well as T-cell responses to GII.4, despite the lack of clear serologic evidence of previous GII.4 exposure,” the investigators wrote.

Based on prior reports that bile enhances norovirus growth or ligand binding, they inoculated specimens with chenodeoxycholic acid (CDCA) and glycochenodeoxycholic acid (GCDCA), pig bile, ox bile, or human bile. “Strikingly, the addition of bile enabled GII.2 Chapel Hill outbreak virus-like particle to bind to saliva from the four nonsecretor donors,” the researchers wrote. Bile acids “may override the genetic advantage of less-diverse HBGA expression in nonsecretors by improving the avidity of GII.2 binding to nonsecretor HBGAs, potentially paving the way for infection.” However, bile salts did not enable the GII.2 strain to replicate in human intestinal enteroid cells, which suggests that additional factors play into how norovirus enters human cells, according to the researchers.

The findings, they wrote, “support development of within-genogroup, cross-reactive antibody and T-cell immunity, key outcomes that may provide the foundation for eliciting broad immune responses after GII.4 vaccination in individuals with limited GII.4 immunity, including young children.”

The National Institutes of Health, the Wellcome Trust, the Centers for Disease Control and Prevention, and a Cancer Center Core support provided funding. Ms. Lindesmith and her associates reported having no relevant conflicts of interest.
 

SOURCE: Lindesmith LC et al. Cell Molec Gastroenterol Hepatol. 2020;10:245-67.
 

A real-time, computer-aided detection system using artificial intelligence significantly improved adenoma detection during high-definition colonoscopy in a multicenter, randomized clinical trial.

The adenoma detection rate was 55% in the intervention group and 40% in the control group, Alessandro Repici, MD, PhD, and his associates wrote in Gastroenterology. Improved detection of smaller adenomas explained the difference. After age, sex, and indication for colonoscopy were controlled for, computer-aided detection (CADe) increased the probability of adenoma detection by 30% (risk ratio, 1.30; 95% confidence interval, 1.14-1.45).

The CADe system did not increase the likelihood of resecting non-neoplastic lesions (26% versus 29% in the control group), said Dr. Repici, of Humanitas Research Hospital in Milano, Italy. “The per-protocol analysis produced similar results,” he and his associates wrote. “The substantial improvement for adenoma detection rate and mean number of adenomas per colonoscopy, without increasing the removal of nonneoplastic lesions, is likely to improve the quality of colonoscopy without affecting its efficiency.”

Screening colonoscopies miss about 25% of adenomas, increasing patients’ risk for colorectal cancer. Although real-time CADe systems can identify colorectal neoplasias, comprehensive studies of the effect of CADe systems on adenoma detection and other colonoscopy quality measures are lacking.

The study included 685 adults from three centers in Italy who underwent screening colonoscopies for colorectal cancer, postpolypectomy surveillance, or workup based on a positive fecal immunochemical test or signs and symptoms of colorectal cancer. Patients were randomly assigned on a one-to-one basis to receive high-definition colonoscopies with or without the CADe system, which consists of an artificial intelligence–based medical device (GI Genius, Medtronic) that processes colonoscopy images in real time and superimposes a green box over suspected lesions. Six experienced endoscopists performed the colonoscopies; the minimum withdrawal time was 6 minutes, and histopathology was the reference standard.

The average number of adenomas detected per colonoscopy was 1.1 (standard deviation, 0.5) in the CADe group and 0.7 (SD, 1.2) in the control group, for an incidence rate ratio of 1.46 (95% CI, 1.15-1.86). The CADe system also significantly improved the detection of adenomas measuring 5 mm or less (34% vs. 27% in the control group; RR, 1.26; 95% CI, 1.01-1.52) and adenomas measuring 6-9 mm (11% vs. 6%, respectively; RR, 1.78; 95% CI, 1.09-2.86). Detection of larger adenomas did not significantly differ between groups. These findings did not vary based on adenoma morphology (polypoid or nonpolypoid) or location (proximal or distal colon), the researchers said.

Detection of multiple adenomas also was higher in the intervention group than in the control group (23% vs. 15%, respectively; RR, 1.50; 95% CI, 1.19-1.95). There were no significant differences in the detection of sessile serrated lesions (7% and 5%) and nonneoplastic lesions (20% and 17%). Average withdrawal times did not significantly differ between groups (417 seconds for CADe and 435 seconds for the control group).

The CADe system is a convolutional neural network that was trained and validated using a series of more than 2,600 histologically confirmed polyps from 840 participants in a prior clinical trial (Gastroenterology 2019;156:2198-207.e1). The system takes an average of 1.5 microseconds to output processed images.

“The addition of real-time CADe to colonoscopy resulted in a 30% and 46% relative increase in adenoma detection rate and the average number of adenomas detected per colonoscopy, demonstrating its efficacy in improving the detection of colorectal neoplasia at screening and diagnostic colonoscopy,” the investigators wrote. “[The s]afety of CADe was demonstrated by the lack of increase of both useless resections and withdrawal time, as well as by the exclusion of any underskilling in the study period.”

Medtronic loaned the equipment for the study. Dr. Repici and the senior author disclosed consulting fees from Medtronic.

SOURCE: Repici A et al. Gastroenterology. 2020 May 3. doi: 10.1053/j.gastro.2020.04.062.

A real-time, computer-aided detection system using artificial intelligence significantly improved adenoma detection during high-definition colonoscopy in a multicenter, randomized clinical trial.

The adenoma detection rate was 55% in the intervention group and 40% in the control group, Alessandro Repici, MD, PhD, and his associates wrote in Gastroenterology. Improved detection of smaller adenomas explained the difference. After age, sex, and indication for colonoscopy were controlled for, computer-aided detection (CADe) increased the probability of adenoma detection by 30% (risk ratio, 1.30; 95% confidence interval, 1.14-1.45).

The CADe system did not increase the likelihood of resecting non-neoplastic lesions (26% versus 29% in the control group), said Dr. Repici, of Humanitas Research Hospital in Milano, Italy. “The per-protocol analysis produced similar results,” he and his associates wrote. “The substantial improvement for adenoma detection rate and mean number of adenomas per colonoscopy, without increasing the removal of nonneoplastic lesions, is likely to improve the quality of colonoscopy without affecting its efficiency.”

Screening colonoscopies miss about 25% of adenomas, increasing patients’ risk for colorectal cancer. Although real-time CADe systems can identify colorectal neoplasias, comprehensive studies of the effect of CADe systems on adenoma detection and other colonoscopy quality measures are lacking.

The study included 685 adults from three centers in Italy who underwent screening colonoscopies for colorectal cancer, postpolypectomy surveillance, or workup based on a positive fecal immunochemical test or signs and symptoms of colorectal cancer. Patients were randomly assigned on a one-to-one basis to receive high-definition colonoscopies with or without the CADe system, which consists of an artificial intelligence–based medical device (GI Genius, Medtronic) that processes colonoscopy images in real time and superimposes a green box over suspected lesions. Six experienced endoscopists performed the colonoscopies; the minimum withdrawal time was 6 minutes, and histopathology was the reference standard.

The average number of adenomas detected per colonoscopy was 1.1 (standard deviation, 0.5) in the CADe group and 0.7 (SD, 1.2) in the control group, for an incidence rate ratio of 1.46 (95% CI, 1.15-1.86). The CADe system also significantly improved the detection of adenomas measuring 5 mm or less (34% vs. 27% in the control group; RR, 1.26; 95% CI, 1.01-1.52) and adenomas measuring 6-9 mm (11% vs. 6%, respectively; RR, 1.78; 95% CI, 1.09-2.86). Detection of larger adenomas did not significantly differ between groups. These findings did not vary based on adenoma morphology (polypoid or nonpolypoid) or location (proximal or distal colon), the researchers said.

Detection of multiple adenomas also was higher in the intervention group than in the control group (23% vs. 15%, respectively; RR, 1.50; 95% CI, 1.19-1.95). There were no significant differences in the detection of sessile serrated lesions (7% and 5%) and nonneoplastic lesions (20% and 17%). Average withdrawal times did not significantly differ between groups (417 seconds for CADe and 435 seconds for the control group).

The CADe system is a convolutional neural network that was trained and validated using a series of more than 2,600 histologically confirmed polyps from 840 participants in a prior clinical trial (Gastroenterology 2019;156:2198-207.e1). The system takes an average of 1.5 microseconds to output processed images.

“The addition of real-time CADe to colonoscopy resulted in a 30% and 46% relative increase in adenoma detection rate and the average number of adenomas detected per colonoscopy, demonstrating its efficacy in improving the detection of colorectal neoplasia at screening and diagnostic colonoscopy,” the investigators wrote. “[The s]afety of CADe was demonstrated by the lack of increase of both useless resections and withdrawal time, as well as by the exclusion of any underskilling in the study period.”

Medtronic loaned the equipment for the study. Dr. Repici and the senior author disclosed consulting fees from Medtronic.

SOURCE: Repici A et al. Gastroenterology. 2020 May 3. doi: 10.1053/j.gastro.2020.04.062.

A real-time, computer-aided detection system using artificial intelligence significantly improved adenoma detection during high-definition colonoscopy in a multicenter, randomized clinical trial.

The adenoma detection rate was 55% in the intervention group and 40% in the control group, Alessandro Repici, MD, PhD, and his associates wrote in Gastroenterology. Improved detection of smaller adenomas explained the difference. After age, sex, and indication for colonoscopy were controlled for, computer-aided detection (CADe) increased the probability of adenoma detection by 30% (risk ratio, 1.30; 95% confidence interval, 1.14-1.45).

The CADe system did not increase the likelihood of resecting non-neoplastic lesions (26% versus 29% in the control group), said Dr. Repici, of Humanitas Research Hospital in Milano, Italy. “The per-protocol analysis produced similar results,” he and his associates wrote. “The substantial improvement for adenoma detection rate and mean number of adenomas per colonoscopy, without increasing the removal of nonneoplastic lesions, is likely to improve the quality of colonoscopy without affecting its efficiency.”

Screening colonoscopies miss about 25% of adenomas, increasing patients’ risk for colorectal cancer. Although real-time CADe systems can identify colorectal neoplasias, comprehensive studies of the effect of CADe systems on adenoma detection and other colonoscopy quality measures are lacking.

The study included 685 adults from three centers in Italy who underwent screening colonoscopies for colorectal cancer, postpolypectomy surveillance, or workup based on a positive fecal immunochemical test or signs and symptoms of colorectal cancer. Patients were randomly assigned on a one-to-one basis to receive high-definition colonoscopies with or without the CADe system, which consists of an artificial intelligence–based medical device (GI Genius, Medtronic) that processes colonoscopy images in real time and superimposes a green box over suspected lesions. Six experienced endoscopists performed the colonoscopies; the minimum withdrawal time was 6 minutes, and histopathology was the reference standard.

The average number of adenomas detected per colonoscopy was 1.1 (standard deviation, 0.5) in the CADe group and 0.7 (SD, 1.2) in the control group, for an incidence rate ratio of 1.46 (95% CI, 1.15-1.86). The CADe system also significantly improved the detection of adenomas measuring 5 mm or less (34% vs. 27% in the control group; RR, 1.26; 95% CI, 1.01-1.52) and adenomas measuring 6-9 mm (11% vs. 6%, respectively; RR, 1.78; 95% CI, 1.09-2.86). Detection of larger adenomas did not significantly differ between groups. These findings did not vary based on adenoma morphology (polypoid or nonpolypoid) or location (proximal or distal colon), the researchers said.

Detection of multiple adenomas also was higher in the intervention group than in the control group (23% vs. 15%, respectively; RR, 1.50; 95% CI, 1.19-1.95). There were no significant differences in the detection of sessile serrated lesions (7% and 5%) and nonneoplastic lesions (20% and 17%). Average withdrawal times did not significantly differ between groups (417 seconds for CADe and 435 seconds for the control group).

The CADe system is a convolutional neural network that was trained and validated using a series of more than 2,600 histologically confirmed polyps from 840 participants in a prior clinical trial (Gastroenterology 2019;156:2198-207.e1). The system takes an average of 1.5 microseconds to output processed images.

“The addition of real-time CADe to colonoscopy resulted in a 30% and 46% relative increase in adenoma detection rate and the average number of adenomas detected per colonoscopy, demonstrating its efficacy in improving the detection of colorectal neoplasia at screening and diagnostic colonoscopy,” the investigators wrote. “[The s]afety of CADe was demonstrated by the lack of increase of both useless resections and withdrawal time, as well as by the exclusion of any underskilling in the study period.”

Medtronic loaned the equipment for the study. Dr. Repici and the senior author disclosed consulting fees from Medtronic.

SOURCE: Repici A et al. Gastroenterology. 2020 May 3. doi: 10.1053/j.gastro.2020.04.062.

High-definition chromoendoscopy significantly outperformed high-definition white-light endoscopy for detecting dysplastic lesions in patients with inflammatory bowel disease, according to the findings of a single-center prospective randomized trial.

In the intention-to-diagnose analysis, rates of dysplasia detection were 11% for high-definition chromoendoscopy and 5% for high-definition white-light endoscopy (P = .032). The per-protocol analysis produced a similar result (12% vs. 5%, respectively; P = .027). High-definition chromoendoscopy also detected significantly more dysplastic lesions per 10 minutes of colonoscope withdrawal time in the per-protocol analysis, although the difference did not reach statistical significance in the intention-to-diagnose analysis.

Overall, the findings “support the use of chromoendoscopy for surveillance of patients with inflammatory bowel diseases,” Bjarki Alexandersson, a PhD student at Karolinska University Hospital in Solna, Stockholm, and his associates wrote in Clinical Gastroenterology and Hepatology. Patients with inflammatory bowel disease are at increased risk for colorectal cancer. Most guidelines support chromoendoscopy for the surveillance of these patients, as do the results of two recent meta-analyses in which chromoendoscopy detected significantly more dysplasias among patients with inflammatory bowel disease than did white light endoscopy. However, in subgroup analyses of these studies, the difference only emerged when comparing chromoendoscopy with standard (not high-definition) white-light endoscopy. “Thus, the evidence in support of chromoendoscopy using high-definition endoscopes is weak,” the researchers wrote.

For the study, they prospectively enrolled 305 patients with ulcerative colitis or Crohn’s disease who were referred for surveillance colonoscopy at an academic hospital in Sweden from March 2011 through April 2016. Participants were randomly assigned to receive either high-definition chromoendoscopy with indigo carmine (152 patients) or high-definition white-light endoscopy (153 patients).

In the intention-to-diagnose analysis, dysplasias were detected in 17 (11%) patients evaluated by high-definition chromoendoscopy, compared with 7 (5%) patients evaluated by high-definition white-light endoscopy (P = .032). After excluding 20 patients for inadequate bowel preparation, 18 patients for protocol violations, and 4 patients for incomplete colonoscopies, the per-protocol population consisted of 263 patients. Dysplasias were detected in 12% of patients evaluated by high-definition chromoendoscopy and in 5% of those evaluated by high-definition white-light endoscopy (P = .027).

All patients also had 32 samples collected by random biopsy, which used to be standard for detecting dysplasia in inflammatory bowel disease but has become more controversial in the era of video endoscopy, the researchers noted. In all, random biopsy evaluation identified dysplasias in nine patients, including six in the high-definition chromoendoscopy group and three in the high-definition white-light endoscopy group. Random biopsies were low-yield, identifying dysplasias in 0.092% of all specimens and 3% of colonoscopies. However, 20% of patients with dysplasias were identified only through random biopsy. This finding resembles that of another recent randomized trial in which 13% of patients with inflammatory bowel disease had dysplasias detected only through random biopsy (Gut. 2018;67:616-24), the researchers noted.

They also evaluated the number of macroscopic dysplastic lesions identified for every 10 minutes of colonoscope withdrawal time. These numbers were not significantly different in the intention-to-diagnose analysis (0.066 lesions in the high-definition chromoendoscopy group vs. 0.027 lesions in the high-definition white-light endoscopy group; P = .056). However, the per-protocol analysis revealed a significant difference (0.073 vs. 0.029 dysplastic lesions, respectively; P = .031).

“Based on our findings, we recommend the use of high-definition chromoendoscopy in inflammatory bowel disease surveillance,” the researchers concluded. They acknowledged several limitations: the study included patients from only one center, most dyplastic lesions were small and, thus, had an unclear natural history, and the endoscopists included both experts and nonexperts.

The Stockholm City Council provided funding. The researchers reported having no conflicts of interest.

SOURCE: Alexandersson B et al. Clin Gastroenterol Hepatol. 2020 Apr 27. doi: 10.1016/j.cgh.2020.04.049.

High-definition chromoendoscopy significantly outperformed high-definition white-light endoscopy for detecting dysplastic lesions in patients with inflammatory bowel disease, according to the findings of a single-center prospective randomized trial.

In the intention-to-diagnose analysis, rates of dysplasia detection were 11% for high-definition chromoendoscopy and 5% for high-definition white-light endoscopy (P = .032). The per-protocol analysis produced a similar result (12% vs. 5%, respectively; P = .027). High-definition chromoendoscopy also detected significantly more dysplastic lesions per 10 minutes of colonoscope withdrawal time in the per-protocol analysis, although the difference did not reach statistical significance in the intention-to-diagnose analysis.

Overall, the findings “support the use of chromoendoscopy for surveillance of patients with inflammatory bowel diseases,” Bjarki Alexandersson, a PhD student at Karolinska University Hospital in Solna, Stockholm, and his associates wrote in Clinical Gastroenterology and Hepatology. Patients with inflammatory bowel disease are at increased risk for colorectal cancer. Most guidelines support chromoendoscopy for the surveillance of these patients, as do the results of two recent meta-analyses in which chromoendoscopy detected significantly more dysplasias among patients with inflammatory bowel disease than did white light endoscopy. However, in subgroup analyses of these studies, the difference only emerged when comparing chromoendoscopy with standard (not high-definition) white-light endoscopy. “Thus, the evidence in support of chromoendoscopy using high-definition endoscopes is weak,” the researchers wrote.

For the study, they prospectively enrolled 305 patients with ulcerative colitis or Crohn’s disease who were referred for surveillance colonoscopy at an academic hospital in Sweden from March 2011 through April 2016. Participants were randomly assigned to receive either high-definition chromoendoscopy with indigo carmine (152 patients) or high-definition white-light endoscopy (153 patients).

In the intention-to-diagnose analysis, dysplasias were detected in 17 (11%) patients evaluated by high-definition chromoendoscopy, compared with 7 (5%) patients evaluated by high-definition white-light endoscopy (P = .032). After excluding 20 patients for inadequate bowel preparation, 18 patients for protocol violations, and 4 patients for incomplete colonoscopies, the per-protocol population consisted of 263 patients. Dysplasias were detected in 12% of patients evaluated by high-definition chromoendoscopy and in 5% of those evaluated by high-definition white-light endoscopy (P = .027).

All patients also had 32 samples collected by random biopsy, which used to be standard for detecting dysplasia in inflammatory bowel disease but has become more controversial in the era of video endoscopy, the researchers noted. In all, random biopsy evaluation identified dysplasias in nine patients, including six in the high-definition chromoendoscopy group and three in the high-definition white-light endoscopy group. Random biopsies were low-yield, identifying dysplasias in 0.092% of all specimens and 3% of colonoscopies. However, 20% of patients with dysplasias were identified only through random biopsy. This finding resembles that of another recent randomized trial in which 13% of patients with inflammatory bowel disease had dysplasias detected only through random biopsy (Gut. 2018;67:616-24), the researchers noted.

They also evaluated the number of macroscopic dysplastic lesions identified for every 10 minutes of colonoscope withdrawal time. These numbers were not significantly different in the intention-to-diagnose analysis (0.066 lesions in the high-definition chromoendoscopy group vs. 0.027 lesions in the high-definition white-light endoscopy group; P = .056). However, the per-protocol analysis revealed a significant difference (0.073 vs. 0.029 dysplastic lesions, respectively; P = .031).

“Based on our findings, we recommend the use of high-definition chromoendoscopy in inflammatory bowel disease surveillance,” the researchers concluded. They acknowledged several limitations: the study included patients from only one center, most dyplastic lesions were small and, thus, had an unclear natural history, and the endoscopists included both experts and nonexperts.

The Stockholm City Council provided funding. The researchers reported having no conflicts of interest.

SOURCE: Alexandersson B et al. Clin Gastroenterol Hepatol. 2020 Apr 27. doi: 10.1016/j.cgh.2020.04.049.

High-definition chromoendoscopy significantly outperformed high-definition white-light endoscopy for detecting dysplastic lesions in patients with inflammatory bowel disease, according to the findings of a single-center prospective randomized trial.

In the intention-to-diagnose analysis, rates of dysplasia detection were 11% for high-definition chromoendoscopy and 5% for high-definition white-light endoscopy (P = .032). The per-protocol analysis produced a similar result (12% vs. 5%, respectively; P = .027). High-definition chromoendoscopy also detected significantly more dysplastic lesions per 10 minutes of colonoscope withdrawal time in the per-protocol analysis, although the difference did not reach statistical significance in the intention-to-diagnose analysis.

Overall, the findings “support the use of chromoendoscopy for surveillance of patients with inflammatory bowel diseases,” Bjarki Alexandersson, a PhD student at Karolinska University Hospital in Solna, Stockholm, and his associates wrote in Clinical Gastroenterology and Hepatology. Patients with inflammatory bowel disease are at increased risk for colorectal cancer. Most guidelines support chromoendoscopy for the surveillance of these patients, as do the results of two recent meta-analyses in which chromoendoscopy detected significantly more dysplasias among patients with inflammatory bowel disease than did white light endoscopy. However, in subgroup analyses of these studies, the difference only emerged when comparing chromoendoscopy with standard (not high-definition) white-light endoscopy. “Thus, the evidence in support of chromoendoscopy using high-definition endoscopes is weak,” the researchers wrote.

For the study, they prospectively enrolled 305 patients with ulcerative colitis or Crohn’s disease who were referred for surveillance colonoscopy at an academic hospital in Sweden from March 2011 through April 2016. Participants were randomly assigned to receive either high-definition chromoendoscopy with indigo carmine (152 patients) or high-definition white-light endoscopy (153 patients).

In the intention-to-diagnose analysis, dysplasias were detected in 17 (11%) patients evaluated by high-definition chromoendoscopy, compared with 7 (5%) patients evaluated by high-definition white-light endoscopy (P = .032). After excluding 20 patients for inadequate bowel preparation, 18 patients for protocol violations, and 4 patients for incomplete colonoscopies, the per-protocol population consisted of 263 patients. Dysplasias were detected in 12% of patients evaluated by high-definition chromoendoscopy and in 5% of those evaluated by high-definition white-light endoscopy (P = .027).

All patients also had 32 samples collected by random biopsy, which used to be standard for detecting dysplasia in inflammatory bowel disease but has become more controversial in the era of video endoscopy, the researchers noted. In all, random biopsy evaluation identified dysplasias in nine patients, including six in the high-definition chromoendoscopy group and three in the high-definition white-light endoscopy group. Random biopsies were low-yield, identifying dysplasias in 0.092% of all specimens and 3% of colonoscopies. However, 20% of patients with dysplasias were identified only through random biopsy. This finding resembles that of another recent randomized trial in which 13% of patients with inflammatory bowel disease had dysplasias detected only through random biopsy (Gut. 2018;67:616-24), the researchers noted.

They also evaluated the number of macroscopic dysplastic lesions identified for every 10 minutes of colonoscope withdrawal time. These numbers were not significantly different in the intention-to-diagnose analysis (0.066 lesions in the high-definition chromoendoscopy group vs. 0.027 lesions in the high-definition white-light endoscopy group; P = .056). However, the per-protocol analysis revealed a significant difference (0.073 vs. 0.029 dysplastic lesions, respectively; P = .031).

“Based on our findings, we recommend the use of high-definition chromoendoscopy in inflammatory bowel disease surveillance,” the researchers concluded. They acknowledged several limitations: the study included patients from only one center, most dyplastic lesions were small and, thus, had an unclear natural history, and the endoscopists included both experts and nonexperts.

The Stockholm City Council provided funding. The researchers reported having no conflicts of interest.

SOURCE: Alexandersson B et al. Clin Gastroenterol Hepatol. 2020 Apr 27. doi: 10.1016/j.cgh.2020.04.049.

All patients with microscopic colitis who had biopsies of both the ascending and descending colon had positive slide review for at least one of the two sites, according to the findings of a single-center retrospective study.

“Microscopic colitis can be detected with 100% sensitivity by analyzing biopsy specimens from the ascending and descending colon. We propose a Western protocol (taking two biopsy specimens each from the ascending colon and the descending colon) in the evaluation of patients for microscopic colitis,” wrote Boris Virine, MD, of London (Ont.) Health Sciences Centre, Western University, together with his associates in Clinical Gastroenterology and Hepatology.

That is half the minimum number of samples recommended by current guidelines, the researchers noted. “The American Society for Gastrointestinal Endoscopy recommends two or more biopsy specimens from the right, transverse, left, and sigmoid colons; however, these recommendations were based on expert opinion rather than scientific evidence, and these guidelines have not been validated,” they wrote.

Microscopic colitis includes lymphocytic and collagenous subtypes, neither of which is grossly apparent on colonoscopy. “Endoscopists therefore often collect multiple random colonic biopsies, potentially oversampling, increasing times of colonoscopy and slide review,” Dr. Virine and his associates wrote.

To better pinpoint optimal biopsy sites and specimen numbers, they studied 101 patients consecutively diagnosed with biopsy-confirmed microscopic colitis at London Health Sciences Centre from 2017 through 2018. Patients with other colonic diseases were excluded from the study. Dr. Virine assessed all individual biopsy fragments, and another pathologist performed a second review of complex cases.

A total of 52 patients had biopsy-confirmed collagenous colitis – that is, normal crypt architecture, increased mononuclear inflammatory cells in the lamina propria, and a thickened subepithelial collagen band. Forty-two patients had lymphocytic colitis, defined as normal crypt architecture, increased mononuclear inflammatory cells in the lamina propria, and increased intraepithelial lymphocytosis. Seven patients had both disease subtypes.

For each patient, an average of nine (standard deviation, 4.9) biopsies had been collected. The most commonly sampled site was the ascending colon (biopsied in 47% of patients in whom at least one sample was labeled by site), followed by the descending colon (40%), rectum (21%), transverse colon (20%), sigmoid colon (15%), cecum (8%), and splenic and hepatic flexures (2% each). Diagnostic sensitivity was highest for the ascending colon (97%), transverse colon (96%), and sigmoid colon (91%) and lowest for the splenic flexure (75%), hepatic flexure (78%), and rectum (82%). The diagnostic sensitivity of the descending colon was 85%. However, all 39 patients with biopsies of both the ascending and descending colon had at least one biopsy that was positive for microscopic colitis (sensitivity, 100%).

“Based on the results of our study, collecting biopsy specimens from both the ascending and descending colons has the same overall sensitivity as following the guidelines,” the researchers concluded. “Because no single site in the colon was diffusely positive for microscopic colitis in 100% of cases, the possibility remains that collecting biopsy specimens from two sites could offer comparable sensitivity with biopsy specimens from each segment of the colon.”

No funding sources were reported. Dr. Virine and the senior author reported having no conflicts of interest. One coauthor disclosed ties to AbbVie, Allergan, Ferring, Janssen, Lupin Pendopharm, Pfizer, Shire, and Takeda.

SOURCE: Virine B et al. Clin Gastroenterol Hepatol. 2020 Feb 25. doi: 10.1016/j.cgh.2020.02.036.

All patients with microscopic colitis who had biopsies of both the ascending and descending colon had positive slide review for at least one of the two sites, according to the findings of a single-center retrospective study.

“Microscopic colitis can be detected with 100% sensitivity by analyzing biopsy specimens from the ascending and descending colon. We propose a Western protocol (taking two biopsy specimens each from the ascending colon and the descending colon) in the evaluation of patients for microscopic colitis,” wrote Boris Virine, MD, of London (Ont.) Health Sciences Centre, Western University, together with his associates in Clinical Gastroenterology and Hepatology.

That is half the minimum number of samples recommended by current guidelines, the researchers noted. “The American Society for Gastrointestinal Endoscopy recommends two or more biopsy specimens from the right, transverse, left, and sigmoid colons; however, these recommendations were based on expert opinion rather than scientific evidence, and these guidelines have not been validated,” they wrote.

Microscopic colitis includes lymphocytic and collagenous subtypes, neither of which is grossly apparent on colonoscopy. “Endoscopists therefore often collect multiple random colonic biopsies, potentially oversampling, increasing times of colonoscopy and slide review,” Dr. Virine and his associates wrote.

To better pinpoint optimal biopsy sites and specimen numbers, they studied 101 patients consecutively diagnosed with biopsy-confirmed microscopic colitis at London Health Sciences Centre from 2017 through 2018. Patients with other colonic diseases were excluded from the study. Dr. Virine assessed all individual biopsy fragments, and another pathologist performed a second review of complex cases.

A total of 52 patients had biopsy-confirmed collagenous colitis – that is, normal crypt architecture, increased mononuclear inflammatory cells in the lamina propria, and a thickened subepithelial collagen band. Forty-two patients had lymphocytic colitis, defined as normal crypt architecture, increased mononuclear inflammatory cells in the lamina propria, and increased intraepithelial lymphocytosis. Seven patients had both disease subtypes.

For each patient, an average of nine (standard deviation, 4.9) biopsies had been collected. The most commonly sampled site was the ascending colon (biopsied in 47% of patients in whom at least one sample was labeled by site), followed by the descending colon (40%), rectum (21%), transverse colon (20%), sigmoid colon (15%), cecum (8%), and splenic and hepatic flexures (2% each). Diagnostic sensitivity was highest for the ascending colon (97%), transverse colon (96%), and sigmoid colon (91%) and lowest for the splenic flexure (75%), hepatic flexure (78%), and rectum (82%). The diagnostic sensitivity of the descending colon was 85%. However, all 39 patients with biopsies of both the ascending and descending colon had at least one biopsy that was positive for microscopic colitis (sensitivity, 100%).

“Based on the results of our study, collecting biopsy specimens from both the ascending and descending colons has the same overall sensitivity as following the guidelines,” the researchers concluded. “Because no single site in the colon was diffusely positive for microscopic colitis in 100% of cases, the possibility remains that collecting biopsy specimens from two sites could offer comparable sensitivity with biopsy specimens from each segment of the colon.”

No funding sources were reported. Dr. Virine and the senior author reported having no conflicts of interest. One coauthor disclosed ties to AbbVie, Allergan, Ferring, Janssen, Lupin Pendopharm, Pfizer, Shire, and Takeda.

SOURCE: Virine B et al. Clin Gastroenterol Hepatol. 2020 Feb 25. doi: 10.1016/j.cgh.2020.02.036.

All patients with microscopic colitis who had biopsies of both the ascending and descending colon had positive slide review for at least one of the two sites, according to the findings of a single-center retrospective study.

“Microscopic colitis can be detected with 100% sensitivity by analyzing biopsy specimens from the ascending and descending colon. We propose a Western protocol (taking two biopsy specimens each from the ascending colon and the descending colon) in the evaluation of patients for microscopic colitis,” wrote Boris Virine, MD, of London (Ont.) Health Sciences Centre, Western University, together with his associates in Clinical Gastroenterology and Hepatology.

That is half the minimum number of samples recommended by current guidelines, the researchers noted. “The American Society for Gastrointestinal Endoscopy recommends two or more biopsy specimens from the right, transverse, left, and sigmoid colons; however, these recommendations were based on expert opinion rather than scientific evidence, and these guidelines have not been validated,” they wrote.

Microscopic colitis includes lymphocytic and collagenous subtypes, neither of which is grossly apparent on colonoscopy. “Endoscopists therefore often collect multiple random colonic biopsies, potentially oversampling, increasing times of colonoscopy and slide review,” Dr. Virine and his associates wrote.

To better pinpoint optimal biopsy sites and specimen numbers, they studied 101 patients consecutively diagnosed with biopsy-confirmed microscopic colitis at London Health Sciences Centre from 2017 through 2018. Patients with other colonic diseases were excluded from the study. Dr. Virine assessed all individual biopsy fragments, and another pathologist performed a second review of complex cases.

A total of 52 patients had biopsy-confirmed collagenous colitis – that is, normal crypt architecture, increased mononuclear inflammatory cells in the lamina propria, and a thickened subepithelial collagen band. Forty-two patients had lymphocytic colitis, defined as normal crypt architecture, increased mononuclear inflammatory cells in the lamina propria, and increased intraepithelial lymphocytosis. Seven patients had both disease subtypes.

For each patient, an average of nine (standard deviation, 4.9) biopsies had been collected. The most commonly sampled site was the ascending colon (biopsied in 47% of patients in whom at least one sample was labeled by site), followed by the descending colon (40%), rectum (21%), transverse colon (20%), sigmoid colon (15%), cecum (8%), and splenic and hepatic flexures (2% each). Diagnostic sensitivity was highest for the ascending colon (97%), transverse colon (96%), and sigmoid colon (91%) and lowest for the splenic flexure (75%), hepatic flexure (78%), and rectum (82%). The diagnostic sensitivity of the descending colon was 85%. However, all 39 patients with biopsies of both the ascending and descending colon had at least one biopsy that was positive for microscopic colitis (sensitivity, 100%).

“Based on the results of our study, collecting biopsy specimens from both the ascending and descending colons has the same overall sensitivity as following the guidelines,” the researchers concluded. “Because no single site in the colon was diffusely positive for microscopic colitis in 100% of cases, the possibility remains that collecting biopsy specimens from two sites could offer comparable sensitivity with biopsy specimens from each segment of the colon.”

No funding sources were reported. Dr. Virine and the senior author reported having no conflicts of interest. One coauthor disclosed ties to AbbVie, Allergan, Ferring, Janssen, Lupin Pendopharm, Pfizer, Shire, and Takeda.

SOURCE: Virine B et al. Clin Gastroenterol Hepatol. 2020 Feb 25. doi: 10.1016/j.cgh.2020.02.036.