• Genetic Variants Associated with IBD Alter Immune Regulatory Signals from Beneficial Microbes

Genetic Variants Associated with IBD Alter Immune Regulatory Signals from Beneficial Microbes

Polymorphisms in susceptibility genes appear to promote development of inflammatory bowel diseases (IBD) by altering the abilities of immune cells to sense protective signals from the microbiome, researchers report. These findings help fill the missing link between genetic risk variants for IBD and dysbiosis of the intestinal microbiome. More than

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  • What can we do with Gastrointestinal Organoids?

What can we do with Gastrointestinal Organoids?

Researchers review the latest discoveries from studies of tissue-derived and pluripotent stem cell–derived intestinal, gastric, esophageal, liver, and pancreatic organoids in the May issue of Gastroenterology. Studies of organoids have provided valuable information about GI development, tissue homeostasis, and disease and might be used to develop personalized medicines. In vitro organoid cultures are

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  • A Case of Duodenal Ulcers from Strongyloides

A Case of Duodenal Ulcers from Strongyloides

Researchers describe a nearly missed case of Strongyloides infection in the April issue of Gastroenterology, had it not been for analysis of duodenal biopsies. Douglas Grunwald et al describe the case of a 74-year-old Jamaican-born woman with a 3-month history of dyspepsia, nausea, bloating, early satiety, and weight loss of 40 lbs. In

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  • An Ex-vivo Model for Electrolyte Transport Along the Small Intestine

An Ex-vivo Model for Electrolyte Transport Along the Small Intestine

Undifferentiated or crypt-like, and differentiated or villus-like, human intestinal enteroids represent distinct points along the crypt–villus axis and can be used to characterize electrolyte transport processes along the small intestine, researchers report in the March issue of Gastroenterology. Studies of their duodenal enteroid model showed that electrogenic Na+/HCO3– cotransporter 1 in the

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  • What is the Best way to Manage Diverticulitis, and how Many People Have it?

What is the Best way to Manage Diverticulitis, and how Many People Have it?

Not all patients with multiple episodes of diverticulitis should undergo preventative surgery, shows a Markov decision model published in the January 2016 issue of Clinical Gastroenterology and Hepatology. Elective surgery after 2 episodes produces fewer quality-adjusted life-years (QALYs) than surgery after 3 episodes or conservative or medical treatments, the model found.

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  • Gut Microbiome Determines Efficacy of Cancer Immunotherapy

Gut Microbiome Determines Efficacy of Cancer Immunotherapy

Specific groups of intestinal microbes can boost the anti-tumor effects of cancer immunotherapies in mice, researchers show. Cancer immunotherapies that block immune inhibitory pathways have been tested in patients with several tumor types, but responses have varied. A study published in Science, while not the first to link gut microbes

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  • A Non-Antibiotic Against Clostridium difficile Infection

A Non-Antibiotic Against Clostridium difficile Infection

A non-antibiotic drug reduces the effects Clostridium difficile infection (CDI) by disabling the bacteria’s toxins, a study showed in mice. The orally administered agent, ebselen, has been in clinical trials for an unrelated condition and could offer a new approach for combating multidrug-resistant CDI. C difficile infection causes life-threatening diarrhea and

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  • Which Patients with Early-stage Ulcerative Colitis Have the Worst Prognoses?

Which Patients with Early-stage Ulcerative Colitis Have the Worst Prognoses?

It is a challenge to accurately identify patients with early-stage ulcerative colitis (UC) who are at highest risk for a poor outcome and therefore might require salvage therapy. In a Perspective article in the April issue of Clinical Gastroenterology and Hepatology, Walter Reinisch et al present prognostic factors for adults with newly

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  • Food Emulsifiers Increase Intestinal Permeability to Promote Inflammation

Food Emulsifiers Increase Intestinal Permeability to Promote Inflammation

Food additives commonly used to thicken and stabilize processed foods disrupt the intestinal microbiota to cause inflammation, researchers found in a study of mice. Emulsifiers are added to foods to hold together mixtures of fat and water, which would otherwise separate. Healthy mice fed a diet containing commonly used emulsifiers (1%

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How Good Gut Microbes Resist Inflammation

Gut commensal bacteria survive inflammation by making a simple switch to their protective coats, researchers show. When harmful microbes like salmonella infect the gut, the innate immune system produces antimicrobial peptides to kill them. But these pathogenic microbes are often similar to the commensal microbes that live in the gut—it was

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