alexa Cloning and functional expression of a human glucagon-like peptide-1 receptor.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Clinical & Experimental Pharmacology

Author(s): Graziano MP, Hey PJ, Borkowski D, Chicchi GG, Strader CD

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Abstract A human glucagon-like 1 peptide receptor has been cloned from the gastric tumor cell line HGT-1. The cDNA clone encodes a protein of 463 amino acids and is a member of the superfamily of seven transmembrane domain G protein coupled receptors. Transfection of the human GLP-1 receptor into COS-7 cells confers upon them high affinity binding for [125I] GLP-1 (7-36) amide. In membranes prepared from COS-7 cells transfected with the human GLP-1 receptor, the binding of [125I] GLP-1 (7-36) amide is inhibited with the rank order of potency GLP-1 (7-36) amide > glucagon > secretin, characteristic of a GLP-1 receptor. The human GLP-1 receptor is functionally coupled to increases in intracellular cAMP in these cells: incubation of COS-7 cells expressing the human GLP-1 receptor with GLP-1 (7-36) amide gives rise to a 4-fold increase in cyclic AMP over basal levels, with an EC50 of 25pM. Glucagon is also a full agonist but is 200-fold less potent than GLP-1 (7-36) amide in stimulating the human GLP-1 receptor. This article was published in Biochem Biophys Res Commun and referenced in Journal of Clinical & Experimental Pharmacology

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