Endocrinology
Phosphatidylinositol 3-kinase gamma deficiency impairs insulin secretion
Published in Obesity and Diabetes Week, August 14th, 2006
"Glucagon-like peptide-1 (GLP-1) increases beta-cell function and growth through protein kinase A- and phosphatidylinositol-3-kinase (PI3-K)/protein kinase B, respectively. GLP-1 acts via a G protein-coupled receptor, and PI3-K gamma is known to be activated by Gbeta gamma Therefore, the role of PI3-K gamma in the chronic effects of GLP-1 on the beta-cell was investigated using PI3-K gamma knockout (KO) mice treated with the GLP-1 receptor agonist, exendin-4 (Ex4; 1 nmol/kg sc every 24 h for 14 d)," investigators in Canada report.
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