Desensitization of glucagon-like peptide 1 receptors in insulin-secreting beta TC3 cells: role of PKA-independent mechanisms.
1. The cellular processes involved in the desensitization of the glucagon-like peptide 1 receptors were investigated by measurements of the glucagon-like peptide 1(7-36)amide (GLP-1(7-36)amide)-induced increases in intracellular free Ca2+ concentration ([Ca2+]i) in insulin-secreting beta TC3 cells. 2. In the presence of 11.2 mM glucose, stimulation with GLP-1(7-36)amide led to a small membrane depolarization (< 10 mV), induction of electrical activity and a rapid increase in [Ca2+]i. The i...Expand abstract
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