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Expression of glucagon‐like peptide 1 receptor in a murine C cell line Regulation of calcitonin gene by glucagon‐like peptide 1
Author(s) -
Lamari Y.,
Boissard C.,
Moukhtar M.S.,
Jullienne A.,
Rosselin G.,
Garel J.-M.
Publication year - 1996
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(96)00895-2
Subject(s) - glucagon , calcitonin receptor , receptor , glucagon like peptide 1 , peptide , glucagon like peptide 1 receptor , calcitonin , medicine , peptide hormone , glucagon like peptide 2 , endocrinology , calcitonin gene related peptide , chemistry , gene , neuropeptide , biology , hormone , biochemistry , diabetes mellitus , type 2 diabetes , agonist
We have characterized, by RT‐PCR amplification using specific primers, the presence of glucagon‐like peptide‐1 (GLP‐1) receptor mRNA in CA‐77 cells, a C cell line derived from a rat medullary thyroid carcinoma. Down‐regulation of the GLP‐1 receptor mRNA was observed after exposure of CA‐77 C cells with GLP‐1 (7–37). Increased secretion of both calcitonin gene‐related peptide (CGRP) and calcitonin (CT) occurred after treatment with GLP‐1 (7–37) associated with elevated steady‐state levels of CGRP and CT mRNA. GLP‐1 (7–37) increased cAMP formation in CA‐77 cells in a dose‐dependent manner; exendin (9–39), a GLP‐1 receptor antagonist, inhibited cAMP production. The GLP‐1 peptide which is produced by intestinal cells could be involved in the control of CT secretion through an entero‐thyroidal axis implying GLP‐1 receptor and increased CT gene expression.