Stem Cells Account for Different Fates of Adenomatous and Hyperplastic Polyps

Adenomatous polyps expand the pool of colon stem cells to become malignant, whereas hyperplastic polyps (HPPs) do not, and therefore remain benign, according to a study published in the September issue of Gastroenterology. Many colorectal cancers arise from adenomatous polyps, which contain mutations that inactivate the tumor suppressor APC. These

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Bariatric Surgery – More Than Expected

Bariatric surgery doesn’t only cause dramatic weight loss—the procedure itself has profound metabolic effects, according to studies published in the September issue of Gastroenterology. Two types of bariatric surgery are most effective therapies for sustained weight loss in obese patients. In Roux-en-Y gastric bypass (RYGB), a gastric pouch drains into

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An Immune Culprit in IBD?

Patients with Crohn’s disease or ulcerative colitis have reduced levels of an important regulator of the immune response—the receptor for granulocyte-macrophage colony-stimulating factor (GM-CSF)—according to a study by Jonathan Goldstein et al. in the July issue of Gastroenterology. The inflammatory bowel diseases (IBD) ulcerative colitis and Crohn’s disease arise from

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Which Roads Lead to NASH?

Which Roads Lead to NASH? The progressive liver disease nonalcoholic steatohepatitis (NASH) is mediated by an innate immune response in the liver that causes tissue damage and fibrosis. The innate immune system protects against invading pathogens, but it’s not clear how it becomes activated in livers of patients with NASH.

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