• Does Asthma Increase Risk for Inflammatory Bowel Diseases?

Does Asthma Increase Risk for Inflammatory Bowel Diseases?

A population-based case–control study published in the September issue of Clinical Gastroenterology and Hepatology associates asthma with later development of Crohn’s disease (CD) and with ulcerative colitis (UC). Although the etiology of asthma and inflammatory bowel diseases (IBD) are not well understood, they both involve complex interactions among genetic and environmental factors and the

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  • How Does Cigarette Smoking Lead to Chronic Pancreatitis?

How Does Cigarette Smoking Lead to Chronic Pancreatitis?

Aryl hydrocarbons in cigarette smoke activate an immune response that promotes pancreatic fibrosis and contributes to pancreatitis, researchers report in the December issue of Gastroenterology. The authors show that constituents of tobacco smoke activate signaling via the aryl hydrocarbon receptor (AHR) to induce T-cell production of interleukin 22 (IL22), activating

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  • How Do NS5A Inhibitors Prevent HCV Replication?

How Do NS5A Inhibitors Prevent HCV Replication?

Researchers have uncovered the mechanisms of drugs that inhibit the hepatitis C virus (HCV) non-structural protein 5A (NS5A), described in the August issue of Gastroenterology. In a quantitative analysis of the kinetics of NS5A inhibitors, David R. McGivern et al.  show that these agents rapidly inhibit intracellular assembly of virions and

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Mapping HCV Infection in the Liver

Using single-cell laser capture and high-resolution analysis, researchers show that hepatitis C virus (HCV) infects hepatocytes in the human liver in nonrandom clusters, whereas expression of anti-viral molecules is scattered among hepatocytes. The findings are presented in the December issue of Gastroenterology. HCV predominantly infects hepatocytes, but most hepatocytes in

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What Can We Learn from a Pig Model of FAP?

A pig model of intestinal adenoma development, described in the November issue of Gastroenterology, will improve our understanding of colorectal cancer development and could be used to evaluate new therapeutics. Familial adenomatous polyposis (FAP) is an inherited disease; patients develop dysplasias in the colon and rectum that develop to adenomatous

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