Diabetes
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Diabetes

The glucagon-like peptides, GLP-1 and GLP-2, are cosecreted by intestinal L cells in response to nutrient ingestion. These peptides exert multiple effects on the gastrointestinal tract and pancreas to regulate the digestion, absorption, and assimilation of ingested nutrients, as well as providing feedback signals to the brain to modulate food intake.

The glucagon-like peptides GLP-1 and GLP-2 are synthesised and then released from enteroendocrine cells in the small and large intestine. GLP-1 promotes efficient nutrient assimilation while GLP-2 regulates energy absorption via effects on nutrient intake, gastric acid secretion and gastric emptying, nutrient absorption, and mucosal permeability.

The glucagon gene is expressed not only in the alpha cells of the pancreatic islets but also in the endocrine cells of the intestinal epithelium (so-called L-cells), and in certain neurons of the brain stem.

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