• How Could the Intestinal Microbiota Contribute to Celiac Disease?

How Could the Intestinal Microbiota Contribute to Celiac Disease?

Bacteria in the small intestine metabolize gluten differently, to increase or decrease its immunogenicity, researchers report in the October issue of Gastroenterology. This interaction between microbes and gluten could help determine the risk for autoimmune enteropathy in genetically susceptible individuals and underlie the reported association between dysbiosis and celiac disease.

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  • Can Microbial Dysbiosis Cause Colonic Inflammation?

Can Microbial Dysbiosis Cause Colonic Inflammation?

Dysbiosis contributes to the pathogenesis of inflammatory bowel diseases (IBD) by altering colonic expression of genes that regulate inflammation and the immune response, researchers report in the July issue of Cellular and Molecular Gastroenterology and Hepatology. An altered intestinal microbiota composition has been associated with IBD. However, it is not

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  • How Could Variants in TM6SF2 Affect Risk for NAFLD?

How Could Variants in TM6SF2 Affect Risk for NAFLD?

The human transmembrane 6 superfamily member 2 (TM6SF2) protein regulates cholesterol metabolism in mice, researchers report in the May issue of Gastroenterology. These findings provide insight into the how a variant of TM6SF2 (encoding the amino acid change E167K) reduces total cholesterol and low-density lipoprotein cholesterol (LDL-c) levels in humans, and

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  • 6000-Calorie Diet Reveals Mechanisms of Obesity-Linked Insulin Resistance

6000-Calorie Diet Reveals Mechanisms of Obesity-Linked Insulin Resistance

A study in which researchers place healthy individuals on 6000-calorie per day diets has identified biologic changes that take place during the early stages of obesity and could lead to insulin resistance. The study, published in the 9 September issue of Science Translational Medicine, pinpoints oxidative stress as the potential

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  • Researchers Determine how FTO Variant Increases Obesity Risk

Researchers Determine how FTO Variant Increases Obesity Risk

Variants in the FTO gene have been associated with obesity and metabolic disease, but little is known about the function of its product. Researchers now show how this gene regulates body weight. FTO encodes a nuclear protein of the AlkB related non-heme iron and 2-oxoglutarate-dependent oxygenase superfamily. In the NIH

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  • Can we Reduce Muscle Cramps in Patients with Cirrhosis?

Can we Reduce Muscle Cramps in Patients with Cirrhosis?

L-carnitine appears to be safe and effective for reducing muscle cramps in patients with cirrhosis, researchers report in the August issue of Clinical Gastroenterology and Hepatology. Many patients with cirrhosis develop frequent muscle cramps, which reduce their quality of life. L-carnitine (L-beta-hydroxy-gamma-N-trimethyl aminobutyric acid) is an amino acid that transports

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  • What Causes Different Types of Fatty Liver Disease?

What Causes Different Types of Fatty Liver Disease?

Hepatic steatosis and steatohepatitis are increasing in prevalence, and can progress to histologically identical, more severe liver disease. They are associated with 3 main factors: alcohol, obesity or metabolic syndrome, and exposure to toxins. Researchers review the similarities, differences, and pathogenic mechanisms of alcohol-associated steatohepatitis (ASH), nonalcoholic steatohepatitis (NASH), and toxicant-associated fatty liver

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  • What Causes Visceral Hypersensitivity in Patients with Irritable Bowel Syndrome?

What Causes Visceral Hypersensitivity in Patients with Irritable Bowel Syndrome?

Colon tissues from patients with irritable bowel syndrome (IBS) produce increased levels of specific polyunsaturated fatty acid (PUFA) metabolites, which stimulate sensory neurons to generate visceral hypersensitivity. This occurs via activation of transient receptor potential (TRP) cation channels, researchers show in the August issue of Gastroenterology. IBS is characterized by abdominal

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  • How Does Vitamin D Lower Cholesterol?

How Does Vitamin D Lower Cholesterol?

Researchers have identified a mechanism by which vitamin D reduces levels of cholesterol. In a mouse study published in the April issue of Gastroenterology, Edwin Chow et al. show that activation of the vitamin D receptor increases cholesterol 7α-hydroxylase (CYP7A1)—an enzyme that metabolizes cholesterol—by downregulating its repressor, SHP. Studies have

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How Can the Gut Microbiota Contribute to Liver Disease?

Microbes that reside in colons of obese individuals produce many compounds that could contribute to development of non-alcoholic fatty liver disease (NAFLD) and other complications of obesity, according to a study published in the July issue of Clinical Gastroenterology and Hepatology. Microorganisms living in the human intestine (gut microbiota) affect

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