Chemoprevention of colorectal cancer in inflammatory bowel disease.

INTRODUCTION: Patients with inflammatory bowel disease are at an increased risk of colorectal cancer when compared to the general population. Chronic inflammation is thought to be the underlying cause, and medications that reduce inflammation have the potential to reduce the risk of colorectal cancer. Areas covered: After conducting a PubMed search for relevant literature, we examined several classes of medications that have been studied as potential chemopreventive agents. These include 5-aminosalicylates, thiopurines, tumor necrosis factor antagonists, ursodeoxycholic acid, NSAIDs, and statins. Expert commentary: While each class of medications has some data to support its use in chemoprevention, the majority of the evidence in each case argues against the routine use of these medications solely for a chemopreventive benefit.

Measurement of Fractional Exhaled Nitric Oxide as a Marker of Disease Activity in Inflammatory Bowel Disease.

BACKGROUND AND AIMS: Definitive diagnosis of IBD requires endoscopic and pathologic confirmation. These tools are also used to classify disease activity. Our aim was to determine if the fractional exhaled nitric oxide (FeNO) could be utilized to screen for IBD and assess for disease activity. METHODS: We matched weighted IBD cases and controls from the 2009-2010 NHANES dataset. All subjects underwent measurement of FeNO using standardized techniques. We assessed for potential confounders for FeNO measurement including age, height, and asthma. For IBD subjects, we used the presence of diarrhea, fatigue, and weight loss as a proxy for IBD activity. Laboratory parameters examined to estimate disease activity included anemia (≤ 10 g/dl), iron deficiency (ferritin ≤ 20 ng/ml), hypoalbuminemia (≤ 3.2 g/dl), and CRP (≥ 1.1 mg/dl). RESULTS: The weighted sample represented 199,414,901 subjects. The weighted prevalence of IBD was 2,084,895 (1.0%). IBD subjects had nearly the same FeNO level as those without IBD (17.0 ± 16.2 vs. 16.7 ± 14.5 ppb). The odds of a FeNO > 25 ppb was half (OR=0.501; 95% CI 0.497-0.504) for subjects with IBD compared to those without IBD after controlling for confounders. The AUROC curve for FeNO was 0.47 (0.35-0.59). FeNO levels were not higher in patients with laboratory values suggestive of active disease. FeNO levels were higher in IBD patients with diarrhea, rectal urgency, and fatigue but were lower in those with unintentional weight loss. CONCLUSION: Measurement of FeNO does not appear to be useful to screen for IBD or assess disease activity.

Multifocal Synchronous Granular Cell Tumors of the Gastrointestinal Tract.

Granular cell tumors (GCT) are rare and unusual tumors, which are usually benign and asymptomatic. Only 5-10% of cases involve the gastrointestinal tract, most commonly as singular, non-cancerous lesions in the esophagus. We report a rare case of symptomatic, multifocal, synchronous GCT involving the esophagus, stomach, and cecum.

Linaclotide: a novel compound for the treatment of irritable bowel syndrome with constipation.

INTRODUCTION: Irritable Bowel Syndrome with constipation (IBS-C) is associated with abdominal pain and infrequent spontaneous bowel movements. Patients with Chronic Idiopathic Constipation do not have abdominal pain as a predominant symptom. Linaclotide represents a new class of medication approved in the USA for both of these common conditions. Linaclotide is approved for IBS-C only in the EU. The only other medication approved at this time for IBS-C is lubiprostone. AREAS COVERED: This review will cover the mechanism of action of linaclotide, and review the pivotal pre-clinical and clinical trials leading to its approval in 2012. The indications, common side effects, and black box warnings listed for linaclotide are reviewed. EXPERT OPINION: Linaclotide is superior to placebo for the treatment of both IBS-C and Chronic Idiopathic Constipation. The drug has minimal systemic bioavailability and a favorable safety profile. For IBS-C, it is appropriate as a first-line prescription treatment. For Chronic Idiopathic Constipation, osmotic or stimulant laxatives should be tried prior to using linaclotide due to their considerable lower cost.