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Celecoxib for the Prevention of Colorectal Adenomas: Results of a Suspended Randomized Controlled Trial.

ABSTRACT: Cyclooxygenase (COX)-2 inhibitors such as celecoxib were designed to preserve anti-inflammatory activity without inhibiting COX-1. Downregulation of COX-2 inhibits colorectal carcinogenesis. The Selenium and Celecoxib Trial was a randomized, placebo-controlled trial of once-daily selenium 200 µg and celecoxib 400 mg, alone or together, for colorectal adenoma prevention. Men and women between age 40 and 80 years were eligible following colonoscopic removal of adenomas. The primary outcome was development of new adenomas. Celecoxib was suspended early because of cardiovascular toxicity in other trials. Accrual to selenium or placebo continued. Before suspension, 824 participants were randomly assigned to celecoxib or placebo, of whom 712 (86.4%) were available for analysis. All statistical tests were two-sided. In the placebo and celecoxib arms of 356 participants each, adenoma detection was 47.5% and 49.7% (relative risk [RR] = 1.04, 95% confidence interval [CI] = 0.90 to 1.21, P = .58), respectively, after median periods of 13.6 and 14.2 months on intervention. Among participants colonoscoped within 12 months of discontinuing intervention (n = 244), overall adenoma recurrence (RR = 0.69, 95% CI = 0.48 to 0.98, P = .04) and recurrence with advanced adenomas (RR = 0.23, 95% CI = 0.07 to 0.80, P = .02) were reduced with celecoxib. Reduction of adenoma recurrence was greatest in participants with previous advanced adenomas. Celecoxib increased risk of hypertension in participants with pre-existing cardiovascular risk factors compared with placebo (hazard ratio = 2.19, 95% CI = 1.07 to 4.50, P = .03). Limited-duration celecoxib prevents adenoma recurrence in patients with prior high-risk adenomas, in whom strategies to minimize cardiovascular toxicity might be feasible.

SUBMITTER: Thompson PA

PROVIDER: S-EPMC6272806 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:To determine the efficacy of calcium supplementation in reducing the recurrence of colorectal adenomas.We conducted a systematic review and meta-analysis of published studies. We searched PubMed, Scopus, the Cochrane Library, the WHO International Clinical Trials Registry Platform, and the ClinicalTrials.gov website, through December 2015. Randomized, placebo-controlled trials assessing supplemental calcium intake for the prevention of recurrence of adenomas were eligible for inclusion. Two reviewers independently selected studies based on predefined criteria, extracted data and outcomes (recurrence of colorectal adenomas, and advanced or "high-risk" adenomas), and rated each trial's risk-of-bias. Between-study heterogeneity was assessed, and pooled risk ratio (RR) estimates with their 95% confidence intervals (95%CI) were calculated using fixed- and random-effects models. To express the treatment effect in clinical terms, we calculated the number needed to treat (NNT) to prevent one adenoma recurrence. We also assessed the quality of evidence using GRADE.Four randomized, placebo-controlled trials met the eligibility criteria and were included. Daily doses of elemental calcium ranged from 1200 to 2000 mg, while the duration of treatment and follow-up of participants ranged from 36 to 60 mo. Synthesis of intention-to-treat data, for participants who had undergone follow-up colonoscopies, indicated a modest protective effect of calcium in prevention of adenomas (fixed-effects, RR = 0.89, 95%CI: 0.82-0.96; random-effects, RR = 0.87, 95%CI: 0.77-0.98; high quality of evidence). The NNT was 20 (95%CI: 12-61) to prevent one colorectal adenoma recurrence within a period of 3 to 5 years. On the other hand, the association between calcium treatment and advanced adenomas did not reach statistical significance (fixed-effects, RR = 0.92, 95%CI: 0.75-1.13; random-effects, RR = 0.92, 95%CI: 0.71-1.18; moderate quality of evidence).Our results suggest a modest chemopreventive effect of calcium supplements against recurrent colorectal adenomas over a period of 36 to 60 mo. Further research is warranted.

Project description:BackgroundNonsteroidal anti-inflammatory drugs are widely used for migraine, but gastrointestinal tolerability limits use. We previously reported results from the first treatment period of this 2-period, randomized, controlled study comparing DFN-15-an oral, ready-made liquid solution of a selective cyclo-oxygenase-2 inhibitor celecoxib-with placebo for the acute treatment of a moderate-severe migraine attack. Herein, we report the effects of treatment for the second treatment period.MethodsIn the first treatment period of this trial, adults with migraine were randomized to double-blind trial treatment of attacks of moderate or severe pain with DFN-15,120 mg or placebo. For the second treatment period, reported herein, participants were re-randomized to treat an attack of any baseline pain intensity (mild, moderate, or severe). Co-primary efficacy endpoints specified for the first attack were not specified for the second attack.ResultsOf the 531 patients who completed the first treatment period, 491 (n = 243 DFN-15; n = 248 placebo; 87% female, mean age 41 years) were re-randomized into the second double-blind treatment period. Baseline pain intensity was mild in 17.2% (85/493) of patients, moderate in 58.4% (288/493) of patients, and severe in 22.9% (113/493) of patients. At 2 hours post-dose, DFN-15 was superior to placebo for freedom from pain (46.2% [110/238] vs 31.1% [76/244], p ≤ 0.001) and the most bothersome symptom (63.4% [121/191] vs 50.0% [98/196], p = 0.010). Treatment-emergent adverse events (TEAEs) occurred in 7.1% (35/493) of patients (DFN-15: 6.1% [15/244]; placebo 8.0% [20/249]). Study drug-related TEAEs occurred in 5.1% (25/493) of patients (DFN-15: 4.5% [11/244]; placebo 5.6% [14/249]); nausea (1% [5/493]) and dysgeusia (0.8% [4/493]) were most common. No serious TEAEs, severe TEAEs, or TEAEs leading to study drug termination were reported.ConclusionsDFN-15 was superior to placebo for pain freedom and freedom from the most bothersome symptom when patients treat a migraine attack of any baseline pain intensity. Rates of TEAEs did not differ between treatment groups.

Project description:BackgroundEpidemiologic and preclinical data suggest that higher intake and serum levels of vitamin D and higher intake of calcium reduce the risk of colorectal neoplasia. To further study the chemopreventive potential of these nutrients, we conducted a randomized, double-blind, placebo-controlled trial of supplementation with vitamin D, calcium, or both for the prevention of colorectal adenomas.MethodsWe recruited patients with recently diagnosed adenomas and no known colorectal polyps remaining after complete colonoscopy. We randomly assigned 2259 participants to receive daily vitamin D3 (1000 IU), calcium as carbonate (1200 mg), both, or neither in a partial 2×2 factorial design. Women could elect to receive calcium plus random assignment to vitamin D or placebo. Follow-up colonoscopy was anticipated to be performed 3 or 5 years after the baseline examinations, according to the endoscopist's recommendation. The primary end point was adenomas diagnosed in the interval from randomization through the anticipated surveillance colonoscopy.ResultsParticipants who were randomly assigned to receive vitamin D had a mean net increase in serum 25-hydroxyvitamin D levels of 7.83 ng per milliliter, relative to participants given placebo. Overall, 43% of participants had one or more adenomas diagnosed during follow-up. The adjusted risk ratios for recurrent adenomas were 0.99 (95% confidence interval [CI], 0.89 to 1.09) with vitamin D versus no vitamin D, 0.95 (95% CI, 0.85 to 1.06) with calcium versus no calcium, and 0.93 (95% CI, 0.80 to 1.08) with both agents versus neither agent. The findings for advanced adenomas were similar. There were few serious adverse events.ConclusionsDaily supplementation with vitamin D3 (1000 IU), calcium (1200 mg), or both after removal of colorectal adenomas did not significantly reduce the risk of recurrent colorectal adenomas over a period of 3 to 5 years. (Funded by the National Cancer Institute; ClinicalTrials.gov number, NCT00153816.).

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Celecoxib for the Prevention of Colorectal Adenomas: Results of a Suspended Randomized Controlled Trial.

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