alexa Novel GPR40 agonist AS2575959 exhibits glucose metabolism improvement and synergistic effect with sitagliptin on insulin and incretin secretion.

Author(s): Tanaka H, Yoshida S, Minoura H, Negoro K, Shimaya A,

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Abstract AIMS: GPR40 is a free fatty acid receptor that regulates glucose-dependent insulin secretion at pancreatic β-cells and glucagon-like peptide-1 (GLP-1), one of the major incretins, secretion at the endocrine cells of the gastrointestinal tract. We investigated the synergistic effect of AS2575959, a novel GPR40 agonist, in combination with sitagliptin, a major dipeptidyl peptidase-IV (DPP-IV) inhibitor, on glucose-dependent insulin secretion and GLP-1 secretion. In addition, we investigated the chronic effects of AS2575959 on whole-body glucose metabolism. MAIN METHODS: We evaluated acute glucose metabolism on insulin and GLP-1 secretion using an oral glucose tolerance test (OGTT) as well as assessed the chronic glucose metabolism in diabetic ob/ob mice following the repeated administration of AS2575959. KEY FINDINGS: We discovered the novel GPR40 agonist sodium [(3S)-6-({4'-[(3S)-3,4-dihydroxybutoxy]-2,2',6'-trimethyl[1,1'-biphenyl]-3-yl}methoxy)-3H-spiro[1-benzofuran-2,1'-cyclopropan]-3-yl]acetate (AS2575959) and found that the compound influenced glucose-dependent insulin secretion both in vitro pancreas β-cell-derived cells and in vivo mice OGTT. Further, we observed a synergistic effect of AS2575959 and DPP-IV inhibitor on insulin secretion and plasma GLP-1 level. In addition, we discovered the improvement in glucose metabolism on repeated administration of AS2575959. SIGNIFICANCE: To our knowledge, this study is the first to demonstrate the synergistic effect of a GPR40 agonist and DPP-IV inhibitor on the glucose-dependent insulin secretion and GLP-1 concentration increase. These findings suggest that GPR40 agonists may represent a promising therapeutic strategy for the treatment of type 2 diabetes mellitus, particularly when used in combination with DPP-IV inhibitors. Copyright © 2013 Elsevier Inc. All rights reserved. This article was published in Life Sci and referenced in

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