Ulcerative colitis-risk loci on chromosomes 1p36 and 12q15 found by genome-wide association study.

Ulcerative colitis is a chronic inflammatory disease of the colon that presents as diarrhea and gastrointestinal bleeding. We performed a genome-wide association study using DNA samples from 1,052 individuals with ulcerative colitis and preexisting data from 2,571 controls, all of European ancestry. In an analysis that controlled for gender and population structure, ulcerative colitis loci attaining genome-wide significance and subsequent replication in two independent populations were identified on chromosomes 1p36 (rs6426833, combined P = 5.1 x 10(-13), combined odds ratio OR = 0.73) and 12q15 (rs1558744, combined P = 2.5 x 10(-12), combined OR = 1.35). In addition, combined genome-wide significant evidence for association was found in a region spanning BTNL2 to HLA-DQB1 on chromosome 6p21 (rs2395185, combined P = 1.0 x 10(-16), combined OR = 0.66) and at the IL23R locus on chromosome 1p31 (rs11209026, combined P = 1.3 x 10(-8), combined OR = 0.56; rs10889677, combined P = 1.3 x 10(-8), combined OR = 1.29)

Antibiotic Therapy for Crohn’s Disease: A Review

Increasing evidence suggests that gut bacteria play a pathogenic role in Crohn’s disease (CD), providing a rationale for the use of antibiotics in the primary treatment of the disease. While there are data to suggest that antibiotics may be effective in treating active luminal, particularly colonic, and/or perianal CD, evidence for their use in these settings is hampered by the lack of well-designed, adequately powered, placebo-controlled trials. Furthermore, although nitroimidazole antibiotics have been shown to reduce postoperative recurrence following ileocolonic resection, their use is limited by side effects. There is a current need for rigorous multicentre studies looking into the role of antibiotics in treating perianal and luminal CD, as well as a need for the large-scale assessment of novel antibiotics, with low systemic absorption, which may improve patient tolerance

Clinical Practice Guidelines for the Medical Management of Nonhospitalized Ulcerative Colitis: The Patient Perspective

A series of clinical practice guidelines were recently developed by the Canadian Association of Gastroenterology (CAG) to provide clinicians with recommendations for the medical management of nonhospitalized ulcerative colitis (UC) patients. These guidelines were developed, reviewed and agreed on by expert clinicians and methodologists. Following the finalization of the guidelines, a group of patients with UC as well as several inflammatory bowel disease clinicians, were brought together for a half-day workshop to provide feedback from the patient perspective. At the workshop, the guideline development process was described and the guidelines were reviewed to ensure comprehension. Patients then had the opportunity to provide their insight to the relevance of the guideline development process and the content of the guidelines as it related to their personal experiences with UC. The patient group believed that, although the new guidelines will be a tremendous resource for the health care provider community, a more ‘lay-friendly’ version would better facilitate dialogue between patients and their health care practitioners. The importance of the patient/physician relationship is paramount when making decisions regarding treatment plans, in which patient preferences play a key role in determining the most appropriate therapy and dosing regimen, which, in turn, impact the likelihood of adherence to the treatment plan. It was also believed that quality of life issues were not fully addressed in the guidelines. Much could be learned from shared experiences and coping strategies that would empower patients to take charge of their health and become equal partners with their care providers

Bile Acid Malabsorption in Chronic Diarrhea: Pathophysiology and Treatment

BACKGROUND: Bile acid malabsorption (BAM) is a common but frequently under-recognized cause of chronic diarrhea, with an estimated prevalence of 4% to 5%

Is There a Role for Therapeutic Drug Monitoring in Patients with Hidradenitis Suppurativa on Tumor Necrosis Factor-α Inhibitors?

Tumor necrosis factor-α inhibitors, adalimumab and infliximab, are at the forefront of biologic therapy for the management of moderate-to-severe hidradenitis suppurativa, with adalimumab as currently the only approved medication for this condition. In treating patients, primary or secondary lack of response (also termed suboptimal response) is a major burden for both patients and healthcare systems and is a challenge with biologics in part owing to the development of anti-drug antibodies following treatment. To overcome this, therapeutic drug monitoring may be conducted proactively or reactively to a patient’s suboptimal response guided by measurements of trough serum drug concentrations and levels of anti-drug antibodies. While strong evidence to support the utility of therapeutic drug monitoring exists in patients with inflammatory bowel disease, current information is limited in the context of hidradenitis suppurativa. We sought to summarize the available evidence and to present the role of therapeutic drug monitoring and other dose optimization strategies in improving clinical response in patients with hidradenitis suppurativa treated with tumor necrosis factor-α inhibitors