Interventions for treating collagenous colitis.

BACKGROUND: Collagenous colitis is a cause of chronic diarrhea. Treatment has been based mainly on anecdotal evidence. This review was performed to identify therapies for collagenous colitis that have been proven in randomized trials. OBJECTIVES: To determine effective treatments for patients with collagenous colitis. SEARCH STRATEGY: Relevant papers published between 1970 and December 2007 were identified via the MEDLINE and PUBMED databases. Manual searches from the references of identified papers, as well as review papers on collagenous or microscopic colitis were performed to identify additional studies. Abstracts from major gastroenterological meetings were searched to identify research submitted in abstract form only. Finally, the Cochrane Controlled Trials Register and the Cochrane Inflammatory Bowel Disease and Functional Bowel Disorders Group Specialized Trials Register were searched for other studies. SELECTION CRITERIA: Ten randomized trials were identified. Seven of these compared active treatment to placebo for treating active disease. Of these, 1 trial studied bismuth subsalicylate, 1 trial studied Boswellia serrata extract, 3 trials studies budesonide, 1 trial studied prednisolone, and 1 trial studied probiotics. One trial compared mesalamine to mesalamine + cholestyramine for treating active disease. Two trials compared budesonide to placebo in maintaining response induced by budesonide. DATA COLLECTION AND ANALYSIS: Data were extracted independently by each author onto 2x2 tables (treatment versus comparator and response versus no response). For therapies assessed in one trial only, P-values were derived using the chi-square test. For therapies assessed in more than one trial, summary test statistics were derived using the Peto odds ratio and 95% confidence intervals. Data were combined for analysis only if the outcomes were sufficiently similar in definition. MAIN RESULTS: In treating active disease, there were 9 patients with collagenous colitis in the trial studying bismuth subsalicylate (nine 262 mg tablets daily for 8 weeks). Clinical response occurred in 100% of patients who received bismuth subsalicylate compared to 0% of patients who received placebo (P = 0.03). Thirty-one patients were enrolled in the trial studying Boswellia serrata extract (three 400 mg capsules daily for 8 weeks). Clinical response occurred in 44% of patients who received Boswellia serrata extract compared to 27% of patients who received placebo (P = 0.32). A total of 94 patients were enrolled in 3 trials studying budesonide (9 mg daily or in a tapering schedule for 6 to 8 weeks). Clinical response occurred in 81% of patients who received budesonide compared to 17% of patients who received placebo (P < 0.00001). The pooled odds ratio for clinical response to treatment with budesonide was 12.32 (95% CI 5.53 to 27.46), with a number needed to treat of 2 patients. Statistically significant histological response occurred with treatment in all 3 trials studying budesonide therapy. Eleven patients were enrolled in the trial studying prednisolone (50 mg daily for 2 weeks). Clinical response occurred in 63% of patients who received prednisolone compared to 0% who received placebo (P = 0.15). Twenty-nine patients were enrolled in the trial studying probiotics (2 capsules containing 0.5 x 10(10) CFU each of L. acidophilus LA-5 and B. animalis subsp. lactis strain BB-12 twice daily for 12 weeks). Clinical response occurred in 29% of patients who received probiotics compared to 13% of patients who received placebo (P = 0.38). Twenty-three patients were enrolled in the trial studying mesalamine (800 mg three times daily) with or without cholestyramine (4 g daily) for 6 months. Clinical response occurred in 73% of patients who received mesalamine alone compared to 100% of patients who received mesalamine + cholestyramine (P = 0.14). In maintaining response, 80 patients who had responded to open-label budesonide were enrolled in 2 trials studying budesonide (6 mg daily for 6 months). Clinical response was maintained in 83% of patients who received budesonide compared to 28% of patients who received placebo (P = 0.0002). The pooled odds ratio for maintenance of clinical response to treatment with budesonide was 8.40 (95% CI 2.73 to 25.81), with a number needed to treat of 2 patients. Histological response was maintained in 48% of patients who received budesonide compared to 15% of patients who received placebo (P = 0.002). AUTHORS' CONCLUSIONS: Budesonide is effective for inducing and maintaining clinical and histological response in patients with collagenous colitis. The evidence for benefit with bismuth subsalicylate and for mesalamine with or without cholestyramine is weak. There is no evidence for the effectiveness of Boswellia serrata extract, prednisolone, or probiotics. These agents and other therapies require further study.

Interventions for treating lymphocytic colitis.

BACKGROUND: Lymphocytic colitis is a cause of chronic diarrhea. Therapy is based mainly on case series and uncontrolled trials, or by extrapolation of data for treating collagenous colitis, a related disorder. This review was performed to identify therapies for lymphocytic colitis that have been proven in randomized controlled trials. OBJECTIVES: To determine effective treatments for patients with clinically active lymphocytic colitis. SEARCH STRATEGY: The MEDLINE, PUBMED and EMBASE databases were searched using the search criteria "microscopic colitis" or "lymphocytic colitis" and "treatment" or "therapy" or "management" to identify relevant papers published between 1970 and December 2007. Manual searches from the references of identified papers and relevant review papers were performed. Abstracts from major gastroenterological meetings were searched to identify research submitted in abstract form only. The trial registry website www.ClinicalTrials.gov was searched to identify registered but unpublished trials. Finally, the Cochrane Central Register of Controlled Trials and the Cochrane Inflammatory Bowel Disease and Functional Bowel Disorders Group Specialized Trials Register were searched for other studies. SELECTION CRITERIA: Five randomized controlled trials were identified. Three of these studies, which assessed bismuth subsalicylate vs. placebo, budesonide vs. placebo, and mesalazine vs. mesalazine vs. cholestyramine in treating active disease, are included in this review. DATA COLLECTION AND ANALYSIS: Data were extracted independently by each author onto 2x2 tables (treatment versus placebo or active comparator and response versus no response). For therapies assessed in one trial only, P values were derived using the chi-square test. MAIN RESULTS: Forty-one patients were enrolled in the trial studying budesonide (9 mg/day for 6 weeks versus placebo). Budesonide was more effective than placebo at inducing both clinical (P = 0.004; NNT = 3) and histological responses (P = 0.04; NNT = 3). Forty-one patients were enrolled in the study assessing mesalazine versus mesalazine plus cholestyramine. A high proportion of patients in each group responded to treatment. However, no statistically significant difference in clinical response was found between the two treatment groups (P = 0.95). Five patients were enrolled in the trial studying bismuth subsalicylate (nine 262 mg tablets daily for 8 weeks vs. placebo). There were no differences in clinical (P=0.10) or histological responses (P=0.71) in patients treated with bismuth subsalicylate compared with placebo. AUTHORS' CONCLUSIONS: A single trial studying budesonide suggests that it may be effective for the treatment of active lymphocytic colitis. An ongoing placebo-controlled trial may confirm the benefit of budesonide. There is weaker evidence that mesalazine with or without cholestyramine may be effective for the treatment of lymphocytic colitis, but this benefit needs to be confirmed in a placebo-controlled study. No conclusions can be made regarding bismuth subsalicylate. These agents require further study before they can be recommended as treatment options for lymphocytic colitis. Further trials studying interventions for lymphocytic colitis are warranted.

Unfractionated or low-molecular weight heparin for induction of remission in ulcerative colitis.

BACKGROUND: There are a limited number of treatment options for patients with ulcerative colitis (UC). An increased risk of thrombosis in UC coupled with an observation that UC patients being treated with anticoagulant therapy for thrombotic events had an improvement in their bowel symptoms led to trials examining the use of unfractionated heparin (UFH) and low molecular weight heparins (LMWH) in patients with active UC. OBJECTIVES: To review randomized trials examining the efficacy of unfractionated heparin (UFH) or low molecular weight heparins (LMWH) for remission induction in patients with ulcerative colitis. SEARCH STRATEGY: The MEDLINE (PUBMED), and EMBASE databases, The Cochrane Central Register of Controlled Trials, the Cochrane IBD/FBD group specialized trials register, review papers on ulcerative colitis, and references from identified papers were searched in an effort to identify all randomized trials studying UFH or LMWH use in patients with ulcerative colitis. Abstracts from major gastroenterological meetings were searched to identify research published in abstract form only. SELECTION CRITERIA: Each author independently reviewed potentially relevant trials to determine their eligibility for inclusion based on the criteria identified above. The Jadad scale was used to assess study quality. Studies published in abstract form only were included if the authors could be contacted for further information. DATA COLLECTION AND ANALYSIS: A data extraction form was developed and used to extract data from included studies. At least 2 authors independently extracted data. Any disagreements were resolved by consensus. Data were analyzed using Review Manager (RevMan 4.2.9). Data were analyzed on an intention-to-treat basis, and treated dichotomously. In cross-over studies, only data from the first arm were included. The primary endpoint was induction of remission, as defined by the studies. Data were combined for analysis if they assessed the same treatments (UFH or LMWH versus placebo or other therapy). If a comparison was only assessed in a single trial, P-values were derived using the chi-square test. If the comparison was assessed in more than one trial, summary test statistics were derived using the Peto odds ratio and 95% confidence intervals (95% CI). The presence of heterogeneity among studies was assessed using the chi-square test (a P value of 0.10 was regarded as statistically significant). If statistically significant heterogeneity was identified the odds ratio and 95% CI were calculated using a random effects model. MAIN RESULTS: There were 2 randomized, double-blind studies assessing LMWH versus placebo for the treatment of mild-moderate active UC. Various outcomes were assessed in the 2 studies. LMWH showed no benefit over placebo in any outcome, including clinical remission (OR 1.09; 95% CI 0.26 to 4.63; P = 0.91), clinical improvement (OR 0.73; 95% CI 0.32 to 1.66; P = 0.45 and OR 1.09; 95% CI 0.18 to 6.58; P = 0.92 in the two studies, respectively), endoscopic improvement (OR 1.35; 95% CI 0.29 to 6.18; P = 0.70), or histological improvement (OR 2.00; 95% CI 0.45 to 8.96; P = 0.37). LMWH was also not beneficial when added to standard therapy in a randomized open-label trial in which the outcome measures included clinical remission (OR 0.71; 95% CI 0.17 to 2.95; P = 0.64), clinical improvement (OR 2.00; 95% CI 0.31 to 12.75; P = 0.46), endoscopic remission (OR 0.71; 95% CI 0.17 to 2.95; P = 0.64), or endoscopic improvement (OR 1.40; 95% CI 0.34 to 5.79; P = 0.64). LMWH was well-tolerated and provided no significant benefit for quality of life. One study examining UFH versus corticosteroids in the treatment of severe UC demonstrated inferiority of UFH in clinical improvement as an outcome measure (OR 0.02; 95% CI 0 to 0.40; P = 0.01). Patients assigned to UFH did not improve clinically. More patients assigned to UFH had rectal hemorrhage as an adverse event. AUTHORS' CONCLUSIONS: There is no evidence to support the use of UFH or LMWH for the treatment of active UC. No further trials examining these drugs for patients with UC are warranted, except perhaps a trial of UFH in patients with mild disease. Any benefit found would need to be weighed against a possible increased risk of rectal bleeding in patients with active UC.

Systematic review with meta-analysis: prevalence, risk factors and costs of aminosalicylate use in Crohn's disease.

BACKGROUND: Aminosalicylates are the most frequently prescribed drugs for patients with Crohn's disease (CD), yet evidence to support their efficacy as induction or maintenance therapy is controversial. AIMS: To quantify aminosalicylate use in CD clinical trials, identify factors associated with use and estimate direct annual treatment costs of therapy. METHODS: MEDLINE, Embase and CENTRAL were searched to April 2017 for placebo-controlled trials in adults with CD treated with corticosteroids, immunosuppressants or biologics. The proportion of patients co-prescribed aminosalicylates in placebo arms was pooled using a random-effects model. Meta-regression was used to identify factors associated with aminosalicylate use. Annual treatment costs were estimated using the 2016 Ontario Drug Benefit Program. RESULTS: Forty-two induction and 10 maintenance trials were included. The pooled proportion of patients co-prescribed aminosalicylates was 44% [95% CI: 39%-49%] in induction trials and 49% [95% CI: 35%-64%] in maintenance trials. There was substantial to considerable heterogeneity (I2  = 86.0%, 91.8% for induction and maintenance trials, respectively). In multivariable meta-regression, aminosalicylate use has decreased over time in induction trials (OR 0.50 [95% CI: 0.34-0.74] per 10-year increment). While a decline has been seen over time, 35% of CD patients were still using aminosalicylates in contemporary trials from the last 5 years. The estimated annual cost for the lowest price mesalazine (mesalamine) formulation is approximately $32 million for the Canadian CD population. CONCLUSIONS: Over one-third of CD patients entering clinical trials are still co-prescribed aminosalicylates. A definitive trial is needed to inform the conventional practice of using aminosalicylates as CD maintenance therapy.

HLA-DQA1-HLA-DRB1 polymorphism is a major predictor of azathioprine-induced pancreatitis in patients with inflammatory bowel disease.

BACKGROUND: Azathioprine (AZA)-induced pancreatitis is an unpredictable and dose-independent adverse event affecting 2%-7% of patients with inflammatory bowel disease (IBD) patients treated with AZA. There are no tools in clinical practice to identify at-risk individuals; however, a genome wide association study (GWAS) identified a strong association between the Class II HLA gene region polymorphism (rs2647087) and thiopurine-induced pancreatitis. AIM: To independently confirm the findings of the GWAS in an IBD cohort, to evaluate its utility in clinical practice and to offer a novel AZA treatment algorithm for IBD based on pharmacogenomic principles. METHODS: A retrospective cohort study evaluated 373 AZA-exposed IBD patients from a tertiary care academic centre in London, Canada. Due to the limited number of patients taking mercaptopurine (MP), such patients were not included this cohort. All subjects underwent screening for the single nucleotide polymorphism (SNP) rs2647087 mapped to the HLA-DQA1*02:01-HLA-DRB1*07:01 haplotype and were sub-divided based on the presence (n = 13) or absence (n = 360) of an AZA-induced pancreatitis diagnosis. The risk of AZA-induced pancreatitis was assessed based on rs2647087 genotype. RESULTS: The risk of pancreatitis during AZA-therapy was highly predictable and genotype dependent: 0.53% for wild type (A/A), 4.25% (OR = 4.19, 95% CI 1.02-36.45, P = 0.044) for heterozygous (A/C), and 14.63% (OR = 15.83, 95% CI 3.80-145.26, P = 0.0001) for homozygous variant (C/C) patients. CONCLUSIONS: The class II HLA region (at rs2647087) is an important marker of AZA-induced pancreatitis risk. We propose a simple and clinically implementable algorithm based on rs2647087 and TPMT genotypes for AZA selection and dosing for patients with IBD.

Interventions for treating lymphocytic colitis.

BACKGROUND: Lymphocytic colitis is a cause of chronic diarrhea. Therapy is based mainly on case series and uncontrolled trials, or by extrapolation of data for treating collagenous colitis, a related disorder. This review was performed to identify therapies for lymphocytic colitis that have been proven in randomized controlled trials. OBJECTIVES: To determine effective treatments for patients with clinically active lymphocytic colitis. SEARCH STRATEGY: The MEDLINE, PUBMED and EMBASE databases were searched using the search criteria "microscopic colitis" or "lymphocytic colitis" and "treatment" or "therapy" or "management" to identify relevant papers published between 1970 and September 2006. Manual searches from the references of identified papers and relevant review papers were performed. Abstracts from major gastroenterological meetings were searched to identify research submitted in abstract form only. Finally, the Cochrane Central Register of Controlled Trials and the Cochrane Inflammatory Bowel Disease and Functional Bowel Disorders Group Specialized Trials Register was searched for other studies. SELECTION CRITERIA: A single randomized trial published in abstract form only which studied bismuth subsalicylate was identified, and included only 5 patients with lymphocytic colitis (and 9 with collagenous colitis). DATA COLLECTION AND ANALYSIS: Data were extracted independently by each author onto 2x2 tables (treatment versus placebo and response versus no response). For therapies assessed in one trial only, P values were derived using the chi-square test. MAIN RESULTS: There were 5 patients with lymphocytic colitis in the trial studying bismuth subsalicylate (nine 262 mg tablets daily for 8 weeks vs. placebo). Although all three patients on active drug experienced clinical improvement compared to none of the placebo group, there were no statistically significant differences in clinical (P = 0.10) or histological (P = 0.71) improvement. AUTHORS' CONCLUSIONS: A single trial studying bismuth subsalicylate as therapy for lymphocytic colitis suggests that it may be beneficial. However, it included only 5 patients and no firm conclusions can be made from such a small trial. Larger trials studying treatments for lymphocytic colitis are warranted.

Methotrexate for induction of remission in ulcerative colitis.

BACKGROUND: Ulcerative colitis is a chronic inflammatory bowel disease. Corticosteroids and 5-aminosalicylates are the most commonly used therapies. However, many patients require immunosuppressive therapy when their disease becomes steroid-refractory or dependent. Methotrexate is a medication that is effective for treating a variety of inflammatory diseases, including Crohn's disease. This review was performed to determine the effectiveness of methotrexate at inducing remission in patients with ulcerative colitis. OBJECTIVES: To review randomized trials examining the efficacy of methotrexate for remission induction in patients with ulcerative colitis. SEARCH STRATEGY: MEDLINE (PUBMED), EMBASE, The Cochrane Central Register of Controlled Trials, the Cochrane IBD/FBD group specialized trials register, review papers on ulcerative colitis, and references from identified papers were searched in an effort to identify all randomized trials studying methotrexate use in patients with ulcerative colitis. Abstracts from major gastroenterological meetings were searched to identify research published in abstract form only. SELECTION CRITERIA: Randomized controlled trials comparing methotrexate with placebo or an active comparator in patients with active ulcerative colitis were considered for inclusion. DATA COLLECTION AND ANALYSIS: Data were extracted independently by each author, analyzed on an intention-to-treat basis, and treated dichotomously. Methotrexate was compared to placebo in one trial. The odds ratio and 95% confidence interval were calculated and P-values were derived using the chi-square test. MAIN RESULTS: Only 1 trial fulfilled the inclusion criteria. This study randomized 30 patients to methotrexate 12.5 mg orally weekly and 37 patients to placebo for 9 months. During the study period, 14/30 patients (47%) assigned to methotrexate, and 18/37 patients (49%) assigned to placebo achieved remission and complete withdrawal from steroids (OR 0.92, 95% CI 0.35-2.42; P = 0.87). The mean time to remission was 4.1 months in the methotrexate group and 3.4 months in the placebo group. AUTHORS' CONCLUSIONS: A single trial of methotrexate 12.5 mg orally weekly showed no benefit over placebo in remission induction in patients with active ulcerative colitis. There is no evidence on which to base recommendations for treating ulcerative colitis patients with methotrexate. However, the possibility of a type 2 error exists, and a higher dose of methotrexate may be effective. A new trial in which adequate numbers of patients are randomized to placebo or a higher dose of methotrexate should be considered.

Interventions for treating collagenous colitis.

BACKGROUND: Collagenous colitis is a disorder that is recognized as a cause of chronic diarrhea. Treatment has been based mainly on anecdotal evidence. This review was performed to identify therapies for collagenous colitis that have been proven in randomized trials. OBJECTIVES: To determine effective treatments for patients with clinically active collagenous colitis. SEARCH STRATEGY: Relevant papers published between 1970 and June 2006 were identified via the MEDLINE and PUBMED databases. Manual searches from the references of identified papers, as well as review papers on collagenous or microscopic colitis were performed to identify additional studies. Abstracts from major gastroenterological meetings were searched to identify research submitted in abstract form only. Finally, the Cochrane Controlled Trials Register and the Cochrane Inflammatory Bowel Disease and Functional Bowel Disorders Group Specialized Trials Register were searched for other studies. SELECTION CRITERIA: Seven randomized trials were identified. One trial studied bismuth subsalicylate (published in abstract form only), one trial studied Boswellia serrata extract (published in abstract form only), one trial studied probiotics, one trial studied prednisolone, and 3 trials studied budesonide for the therapy of collagenous colitis. DATA COLLECTION AND ANALYSIS: Data were extracted independently by each author onto 2x2 tables (treatment versus placebo and response versus no response). For therapies assessed in one trial only, p-values were derived using the chi-square test. For therapies assessed in more than one trial, summary test statistics were derived using the Peto odds ratio and 95% confidence intervals. Data were combined for analysis only if the outcomes were sufficiently similar in definition. MAIN RESULTS: There were 9 patients with collagenous colitis in the trial studying bismuth subsalicylate (nine 262 mg tablets daily for 8 weeks). Those randomized to active drug were more likely to have clinical (p = 0.003) and histological (p = 0.003) improvement than those assigned to placebo. Eleven patients were enrolled in the trial studying prednisolone (50 mg daily for 2 weeks). There was a trend towards clinical response in patients on active medication compared to placebo (p = 0.064). The effect of prednisolone on histologic improvement was not studied. Thirty-one patients were enrolled in the Boswellia serrata extract trial. Clinical improvement was noted in 44% of patients who received active treatment compared to 27% of patients who received placebo (p = 0.32). Twenty-nine patients were enrolled in the probiotics trial. Clinical improvement was noted in 29% of patients who received probiotics compared to 13% of patients who received placebo (p = 0.635). A total of 94 patients were enrolled in 3 trials studying budesonide (9 mg daily or in a tapering schedule for 6 to 8 weeks). The pooled odds ratio for clinical response to treatment with budesonide was 12.32 (95% CI 5.53-27.46), with a number needed to treat of 2 patients. There was significant histological improvement with treatment in all 3 trials studying budesonide therapy. Budesonide also appears to improve patients' quality of life. AUTHORS' CONCLUSIONS: Budesonide is effective for the treatment of collagenous colitis. The evidence for benefit with bismuth subsalicylate is weaker. The effectiveness of prednisolone, Boswellia serrata extract, probiotics and other therapies for induction or maintenance of remission of collagenous colitis is unknown and requires further study.

Genetic Predictors of Azathioprine Toxicity and Clinical Response in Patients with Inflammatory Bowel Disease.

BACKGROUND: Thiopurines (Azathioprine (AZA) and 6-Mercaptopurine (6-MP) are considered a well-established therapy for patients with Inflammatory Bowel Disease (IBD) including ulcerative colitis (UC) and Crohn's Disease (CD). However, nearly 20% of patients discontinue thiopurines due to adverse events. Functional polymorphisms of several enzymes involved in the metabolism of thiopurines have been linked with toxicity. The clinical value of variant carriers such as TPMT, ITPA and GSTs in predicting toxicity and adverse events for IBD patients treated with thiopurines remains to be clarified. OBJECTIVES: To determine if variation in TPMT, ITPA and GST genotypes can predict adverse effects such as neutropenia, pancreatitis, liver enzyme elevation, as well as clinical response for patients with IBD treated with thiopurines. METHODS: Patients known to have IBD and treated with AZA or 6MP were enrolled. Adverse effects were calculated and their correlation with TPMT, ITPA and GST genotypes was evaluated. Further, the correlation between clinical response and TPMT, ITPA and GST genotypes were assessed. RESULTS: A total of 53 patients were enrolled. 16/53 patients (28.6%) responded to AZA therapy. 17 patients experienced adverse events with 10 having to discontinue treatment. Three patients (5.4%) developed severe myelosuppression (WBC< 2.0 or neutrophils <1.0). Loss of function TPMT genotype was associated with adverse events (OR 3.64, 95% CI 0.55 - 24.23, p=0.0313). ITPA and GST polymorphisms were not associated with toxicity. GSTM1 deletion was associated with poor clinical response to therapy (OR 3.75, 95% CI 0.940 - 14.97, p=0.1028), however, neither TPMT*3A nor ITPA polymorphisms were associated with clinical response. CONCLUSION: In addition to TPMT for adverse events, genotyping for GSTM1 appears to predict clinical response in IBD patients treated with thiopurines.

Interventions for treating collagenous colitis.

BACKGROUND: Collagenous colitis is a disorder that is recognized as a cause of chronic diarrhea. Treatment has been based mainly on anecdotal evidence. This review was performed to identify therapies for collagenous colitis that have been proven in randomized trials. OBJECTIVES: To determine effective treatments for patients with clinically active collagenous colitis. SEARCH STRATEGY: Relevant papers published between 1970 and June 2005 were identified via the MEDLINE and PUBMED databases. Manual searches from the references of identified papers, as well as review papers on collagenous or microscopic colitis were performed to identify additional studies. Abstracts from major gastroenterological meetings were searched to identify research submitted in abstract form only. Finally, the Cochrane Controlled Trials Register and the Cochrane Inflammatory Bowel Disease and Functional Bowel Disorders Group Specialized Trials Register were searched for other studies. SELECTION CRITERIA: Six randomized trials were identified. One trial studied bismuth subsalicylate (published in abstract form only), one trial studied Boswellia serrata extract (published in abstract form only), one trial studied prednisolone, and 3 trials studied budesonide in the therapy of collagenous colitis. DATA COLLECTION AND ANALYSIS: Data were extracted independently by each author onto 2x2 tables (treatment versus placebo and response versus no response). For therapies assessed in one trial only, p-values were derived using the chi-square test. For therapies assessed in more than one trial, summary test statistics were derived using the Peto odds ratio and 95% confidence intervals. Data were combined for analysis only if the outcomes were sufficiently similar in definition. MAIN RESULTS: There were 9 patients with collagenous colitis in the trial studying bismuth subsalicylate (nine 262 mg tablets daily for 8 weeks). Those randomized to active drug were more likely to have clinical (p = 0.003) and histological (p = 0.003) improvement than those assigned to placebo. Eleven patients were enrolled in the trial studying prednisolone (50 mg daily for 2 weeks). There was a trend towards clinical response in patients on active medication compared to placebo (p = 0.064). The effect of prednisolone on histologic improvement was not studied. Thirty-one patients were enrolled in the Boswellia serrata extract trial. Clinical improvement was noted in 44% of patients who received active treatment compared to 27% of patients who received placebo (p = 0.32). A total of 94 patients were enrolled in 3 trials studying budesonide (9 mg daily or in a tapering schedule for 6 to 8 weeks). The pooled odds ratio for clinical response to treatment with budesonide was 12.32 (95% CI 5.53 - 27.46), with a number needed to treat of 2 patients. There was significant histological improvement with treatment in all 3 trials studying budesonide therapy. Budesonide also appears to improve patients' quality of life. AUTHORS' CONCLUSIONS: Budesonide is effective for the treatment of collagenous colitis. The evidence for benefit with bismuth subsalicylate is weaker. The effectiveness of prednisolone and Boswellia serrata extract and other therapies for induction or maintenance of remission of collagenous colitis is unknown and requires further study.

Interventions for treating collagenous colitis.

BACKGROUND: Collagenous colitis is a disorder that is recognized as a cause of chronic diarrhea. Treatment has been based mainly on anecdotal evidence. This review was performed to identify therapies for collagenous colitis that have been proven in randomized trials. OBJECTIVES: To determine effective treatments for patients with clinically active collagenous colitis. SEARCH STRATEGY: Relevant papers published between 1970 and January 2002 were identified via the MEDLINE, PUBMED, and EMBASE databases. Manual searches from the references of identified papers, as well as review papers on collagenous or microscopic colitis were performed to identify additional studies. Abstracts from major gastroenterological meetings were searched to identify research submitted in abstract form only. Finally, the Cochrane Controlled Trials Register and the Cochrane Inflammatory Bowel Disease Group Specialized Trials Register were searched for other studies. SELECTION CRITERIA: Four randomized trials were identified. One trial studied bismuth subsalicylate (published in abstract form only), and 3 trials (2 published in abstract form only) studied budesonide in the therapy of collagenous colitis. DATA COLLECTION AND ANALYSIS: Data were extracted independently by each author onto 2x2 tables (treatment versus placebo and response versus no response). For therapies assessed in one trial only, p-values were derived using the chi-square test. For therapies assessed in more than one trial, summary test statistics were derived using the Peto odds ratio and 95% confidence intervals. Data were combined for analysis only if the outcomes were sufficiently similar in definition. MAIN RESULTS: There were 9 patients with collagenous colitis in the trial studying bismuth subsalicylate (nine 262 mg tablets daily for 8 weeks). Those randomized to active drug were more likely to have clinical (p=0.003) and histological (p=0.003) improvement than those assigned to placebo. A total of 86 patients were enrolled in 3 trials studying budesonide (9 mg daily for 6 to 8 weeks). The pooled odds ratio for clinical response to treatment with budesonide was 16.79 (95% CI 7.28-38.74), with a number needed to treat of 2 patients. There was significant histological improvement with treatment in all 3 trials studying budesonide therapy. REVIEWER'S CONCLUSIONS: Budesonide is effective in the treatment of collagenous colitis. The evidence for bismuth subsalicylate is weaker, but still important. The roles of these and other therapies in inducing or maintaining remission (as opposed to clinical or histological improvement) of collagenous colitis are unknown.

Interventions for treating collagenous colitis.

BACKGROUND: Collagenous colitis is a disorder that is recognized as a cause of chronic diarrhea. Treatment has been based mainly on anecdotal evidence. This review was performed to identify therapies for collagenous colitis that have been proven in randomized trials. OBJECTIVES: To determine effective treatments for patients with clinically active collagenous colitis. SEARCH STRATEGY: Relevant papers published between 1970 and October 2002 were identified via the MEDLINE, PUBMED, and EMBASE databases. Manual searches from the references of identified papers, as well as review papers on collagenous or microscopic colitis were performed to identify additional studies. Abstracts from major gastroenterological meetings were searched to identify research submitted in abstract form only. Finally, the Cochrane Controlled Trials Register and the Cochrane Inflammatory Bowel Disease Group Specialized Trials Register were searched for other studies. SELECTION CRITERIA: Four randomized trials were identified. One trial studied bismuth subsalicylate (published in abstract form only), and 3 trials (1 published in abstract form only) studied budesonide in the therapy of collagenous colitis. DATA COLLECTION AND ANALYSIS: Data were extracted independently by each author onto 2x2 tables (treatment versus placebo and response versus no response). For therapies assessed in one trial only, p-values were derived using the chi-square test. For therapies assessed in more than one trial, summary test statistics were derived using the Peto odds ratio and 95% confidence intervals. Data were combined for analysis only if the outcomes were sufficiently similar in definition. MAIN RESULTS: There were 9 patients with collagenous colitis in the trial studying bismuth subsalicylate (nine 262 mg tablets daily for 8 weeks). Those randomized to active drug were more likely to have clinical (p=0.003) and histological (p=0.003) improvement than those assigned to placebo. A total of 94 patients were enrolled in 3 trials studying budesonide (9 mg daily for 6 to 8 weeks). The pooled odds ratio for clinical response to treatment with budesonide was 12.32 (95% CI 5.53-27.46), with a number needed to treat of 2 patients. There was significant histological improvement with treatment in all 3 trials studying budesonide therapy. REVIEWER'S CONCLUSIONS: Budesonide is effective in the treatment of collagenous colitis. The evidence for bismuth subsalicylate is weaker, but still important. The roles of these and other therapies in inducing or maintaining remission (as opposed to clinical or histological improvement) of collagenous colitis are unknown.

Interventions for treating collagenous colitis.

BACKGROUND: Collagenous colitis is a disorder that is recognized as a cause of chronic diarrhea. Treatment has been based mainly on anecdotal evidence. This review was performed to identify therapies for collagenous colitis that have been proven in randomized trials. OBJECTIVES: To determine effective treatments for patients with clinically active collagenous colitis. SEARCH STRATEGY: Relevant papers published between 1970 and August 2003 were identified via the MEDLINE and PUBMED databases. Manual searches from the references of identified papers, as well as review papers on collagenous or microscopic colitis were performed to identify additional studies. Abstracts from major gastroenterological meetings were searched to identify research submitted in abstract form only. Finally, the Cochrane Controlled Trials Register and the Cochrane Inflammatory Bowel Disease Group Specialized Trials Register were searched for other studies. SELECTION CRITERIA: Five randomized trials were identified. One trial studied bismuth subsalicylate (published in abstract form only), one trial studied prednisolone, and 3 trials studied budesonide in the therapy of collagenous colitis. DATA COLLECTION AND ANALYSIS: Data were extracted independently by each author onto 2x2 tables (treatment versus placebo and response versus no response). For therapies assessed in one trial only, p-values were derived using the chi-square test. For therapies assessed in more than one trial, summary test statistics were derived using the Peto odds ratio and 95% confidence intervals. Data were combined for analysis only if the outcomes were sufficiently similar in definition. MAIN RESULTS: There were 9 patients with collagenous colitis in the trial studying bismuth subsalicylate (nine 262 mg tablets daily for 8 weeks). Those randomized to active drug were more likely to have clinical (p=0.003) and histological (p=0.003) improvement than those assigned to placebo. Eleven patients were enrolled in the trial studying prednisolone (50 mg daily for 2 weeks). There was a trend towards clinical response in patients on active medication compared to placebo (p=0.064). The effect of prednisolone on histologic improvement was not studied. A total of 94 patients were enrolled in 3 trials studying budesonide (9 mg daily or in a tapering schedule for 6 to 8 weeks). The pooled odds ratio for clinical response to treatment with budesonide was 12.32 (95% CI 5.53-27.46), with a number needed to treat of 2 patients. There was significant histological improvement with treatment in all 3 trials studying budesonide therapy. REVIEWER'S CONCLUSIONS: Budesonide is effective for the treatment of collagenous colitis. The evidence for benefit with bismuth subsalicylate is weaker. Prednisolone may be effective for treatment of collagenous colitis, but only a single very small study has been reported. The effectiveness of these and other therapies for induction or maintenance of remission (as opposed to producing clinical or histological improvement) of collagenous colitis is unknown.

Interventions for treating collagenous colitis.

BACKGROUND: Collagenous colitis is a disorder that is recognized as a cause of chronic diarrhea. Treatment has been based mainly on anecdotal evidence. This review was performed to identify therapies for collagenous colitis that have been proven in randomized trials. OBJECTIVES: To determine effective treatments for patients with clinically active collagenous colitis. SEARCH STRATEGY: Relevant papers published between 1970 and April 2003 were identified via the MEDLINE and PUBMED databases. Manual searches from the references of identified papers, as well as review papers on collagenous or microscopic colitis were performed to identify additional studies. Abstracts from major gastroenterological meetings were searched to identify research submitted in abstract form only. Finally, the Cochrane Controlled Trials Register and the Cochrane Inflammatory Bowel Disease Group Specialized Trials Register were searched for other studies. SELECTION CRITERIA: Four randomized trials were identified. One trial studied bismuth subsalicylate (published in abstract form only), and 3 trials studied budesonide in the therapy of collagenous colitis. DATA COLLECTION AND ANALYSIS: Data were extracted independently by each author onto 2x2 tables (treatment versus placebo and response versus no response). For therapies assessed in one trial only, p-values were derived using the chi-square test. For therapies assessed in more than one trial, summary test statistics were derived using the Peto odds ratio and 95% confidence intervals. Data were combined for analysis only if the outcomes were sufficiently similar in definition. MAIN RESULTS: There were 9 patients with collagenous colitis in the trial studying bismuth subsalicylate (nine 262 mg tablets daily for 8 weeks). Those randomized to active drug were more likely to have clinical (p=0.003) and histological (p=0.003) improvement than those assigned to placebo. A total of 94 patients were enrolled in 3 trials studying budesonide (9 mg daily or in a tapering schedule for 6 to 8 weeks). The pooled odds ratio for clinical response to treatment with budesonide was 12.32 (95% CI 5.53-27.46), with a number needed to treat of 2 patients. There was significant histological improvement with treatment in all 3 trials studying budesonide therapy. REVIEWER'S CONCLUSIONS: Budesonide is effective in the treatment of collagenous colitis. The evidence for bismuth subsalicylate is weaker, but still important. The roles of these and other therapies in inducing or maintaining remission (as opposed to clinical or histological improvement) of collagenous colitis are unknown.

Pharmacokinetic profiles for oral and subcutaneous methotrexate in patients with Crohn's disease.

BACKGROUND: Methotrexate (MTX) is administered subcutaneously to Crohn's Disease (CD) patients. There are very few studies evaluating the use of oral (PO) MTX in CD. A drug and its pharmaceutical alternative are equivalent (bioequivalence) when the bioavailability of the alternative falls within 80-125% of the bioavailability of the standard (US Food and Drug Administration - FDA). AIM: To compare the pharmacokinetic (PK) profiles of PO and subcutaneous (SC) MTX in CD patients to determine the bioequivalence of these two routes. METHODS: Eleven patients received a PO and an SC MTX dose (25 mg) separated by one week over a two-week interval. Blood samples were collected at specified times over a 24-h period for each patient on two separate days. MTX plasma levels were obtained using sensitive mass spectrometry. Areas under the curve (AUC) were compared between the two routes. RESULTS: The mean AUC values were 3375 ng/mL × h (PO MTX) and 3985 ng/mL × h (SC MTX). The mean AUC ratio (PO/SC) was 0.86 (0.62-1.08). This correlates with a relative PO bioavailability of 86% in comparison to SC. The 90% confidence interval for the mean AUC (PO/SC) ratio is (0.785, 0.929). There were no adverse events. CONCLUSIONS: The mean MTX AUC (PO/SC) in these patients falls outside the 90% confidence interval for the bioequivalence limit. SC MTX is more bioavailable than PO MTX; however, the mean relative MTX bioavailability (PO/SC) nearly met the FDA bioequivalence standard and PO MTX could be proposed in responders who would prefer this route.

Meta-analysis: vasoactive medications for the management of acute variceal bleeds.

BACKGROUND: Vasoactive medications such as vasopressin, somatostatin and their analogues (terlipressin, vapreotide and octreotide) are commonly used for the treatment of acute variceal bleeding. However, the risks and benefits of these interventions are not well understood. AIM: To undertake a meta-analysis of the efficacy of vasoactive medications in patients having acute variceal bleeds. METHODS: Randomised controlled trials (RCTs) of vasopressin, somatostatin and their analogues, administered to patients with acute variceal bleeds were identified based on systematic searches of nine electronic databases and multiple sources of grey literature. RESULTS: The search identified 3011 citations, and 30 trials with a total of 3111 patients met eligibility criteria. The use of vasoactive agents was associated with a significantly lower risk of 7-day mortality (RR 0.74; 95% CI 0.57-0.95; P = 0.02; I(2) = 0%; moderate quality of evidence), and a significant improvement in haemostasis (RR 1.21, 95% CI 1.13-1.30; P < 0.001; I(2) = 28%; very low quality of evidence), lower transfusion requirements (pooled mean difference -0.70 units of blood transfused, 95% CI -1.01 to -0.38; P < 0.001; I(2) = 82%; moderate quality of evidence), and a shorter duration of hospitalisation (pooled mean difference -0.71 days; 95% CI -1.23 to -0.19; P = 0.007; I(2) = 0%; low quality of evidence). Studies comparing different vasoactive agents did not show a difference in efficacy, although the quality of evidence was very low. CONCLUSIONS: The use of vasoactive agents was associated with a significantly lower risk of acute all-cause mortality and transfusion requirements, and improved control of bleeding and shorter hospital stay. Studies comparing different vasoactive medications failed to demonstrate a difference in efficacy.

The safety and efficacy of antitumour necrosis factor-alpha therapy for inflammatory bowel disease in patients post liver transplantation: a case series.

BACKGROUND: The role of antitumour necrosis factor-alpha (anti-TNF) therapy for inflammatory bowel disease (IBD) among liver transplant recipients is largely unknown given the rarity of this population and the paucity of literature on the subject. AIM: To investigate the safety and efficacy of anti-TNF therapy for refractory IBD in the post liver transplant population. METHODS: The liver transplant database at London Health Sciences Centre was searched to identify adult patients with IBD treated with anti-TNF therapy post transplantation. RESULTS: Six patients (five men, one woman) were identified, aged 28-65. All patients had cadaveric orthotopic liver transplants. Four patients required transplantation due to primary sclerosing cholangitis, one due to autoimmune hepatitis, and one due to biliary atresia. Five patients suffered from Crohn's disease and the remaining patient from indeterminate colitis. All patients were treated with infliximab 5 mg/kg every 8 weeks after undergoing induction at weeks 0, 2 and 6, with the exception of one patient. The duration of infliximab therapy ranged from 8 weeks to 4 years. Four patients treated with infliximab experienced sustained improvement of their IBD symptoms post transplantation, as documented by Harvey-Bradshaw Index scores demonstrating clinical remission. Of the remaining two patients, neither had sustained improvement of their IBD with infliximab or subsequent adalimumab. One patient was diagnosed with systemic lupus erythematosus and another with colorectal adenocarcinoma following anti-TNF therapy. Otherwise, no side effects were attributed to anti-TNF therapy. CONCLUSIONS: Based on this case series, anti-TNF therapy appears to be safe and effective for treating refractory IBD in patients post liver transplantation. These patients respond to anti-TNF therapy similar to those who have not been previously transplanted.

Safety and efficacy of tegaserod therapy in patients with irritable bowel syndrome or chronic constipation.

BACKGROUND: Tegaserod, a 5-HT4 agonist, is effective for treating irritable bowel syndrome and chronic constipation. However, sales of this drug were recently suspended due to concerns about a higher rate of cardiovascular events in patients receiving tegaserod over placebo in clinical trials. Our aim was to review patients in our practice prescribed tegaserod to determine if any of them had suffered a cardiovascular event or other significant adverse effects while on this therapy. Additionally, we attempted to determine the efficacy of tegaserod in clinical practice. METHODS: Patients with irritable bowel syndrome or chronic constipation in our practice prescribed tegaserod were identified through a search of billing codes and charts reviews. These patients were contacted and questioned about symptoms of cardiovascular events or other adverse events while on tegaserod. The efficacy of this drug was determined by a symptom scale during and after stopping tegaserod. RESULTS: Sufficient data for analysis was retrieved for 51 of 67 patients prescribed tegaserod. Of these, 37 patients (72.5%) experience no adverse events and 14 patients (27.4%) experienced at least one adverse event, including 6 patients (11.8%) with major adverse events (2 patients (3.9%) with atypical chest pain; 4 patients (7.8%) with syncope; and 2 patients (3.9%) who died. One patient died from advanced pancreatic cancer. The other, who had multiple cardiovascular risk factors as well as a previous myocardial infarction, suffered a cardiac arrest 2 days postoperatively following a below knee amputation, and had actually been off tegaserod for 7 days after hospital admission. Patients graded the severity of both abdominal pain and constipation as worse after stopping therapy compared to during therapy (p<0.0002 and p<0.0001, respectively). CONCLUSIONS: The risk of cardiovascular events during tegaserod therapy may be increased in patients with other risk factors. However, this drug is effective for treating irritable bowel syndrome and chronic constipation, and might be used in a select patient population with severe symptoms but without other risk factors for cardiovascular events.

Predictive factors associated with immunosuppressive agent use in ulcerative colitis: a case-control study.

BACKGROUND: Some patients with ulcerative colitis (UC) require immunosuppressants as maintenance therapy. AIM: To assess epidemiological, clinical and disease factors at diagnosis that predict immunosuppressant use in UC. METHODS: All UC patients diagnosed between 1992 and 2005 and currently managed in the inflammatory bowel disease (IBD) clinic were included. Forty-three patients who currently or previously received azathioprine (AZA) or mercaptopurine (MP) for UC were compared with 130 controls. Charts were reviewed and logistic regression analyses were applied to identify factors associated with AZA or MP use. RESULTS: In univariate model, seven factors at diagnosis correlated with AZA use: male gender [odds ratio (OR) 2.2]; left-sided or extensive colitis or pancolitis (OR 8.7-14.1); systemic steroid use within the first 6 months of diagnosis (OR 5.1); more than 10 bowel movements daily (OR 6.4); persistent or mostly blood in stool (OR 2.8); endoscopic proven moderate to severe disease (OR 7.2-12.0) and requirement of hospitalization (OR 2.7) on diagnosis. In multivariate model, the first three factors were shown to be statistically significant. CONCLUSION: Male gender, initial presentation with severe and extensive disease clinically and endoscopically, requirement of hospitalization on diagnosis or systemic steroids within 6 months of diagnosis are predictive factors for immunosuppressant use in UC.