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Glucagon-like peptide 1 receptor plays a critical role in geniposide-regulated insulin secretion in INS-1 cells
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Glucagon-like peptide 1 receptor plays a critical role in geniposide-regulated insulin secretion in INS-1 cells
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Journal Article
Glucagon-like peptide 1 receptor plays a critical role in geniposide-regulated insulin secretion in INS-1 cells
2012
Overview
Aim:
To explore the role of the glucagon-like peptide 1 receptor (GLP-1R) in geniposide regulated insulin secretion in rat INS-1 insulinoma cells.
Methods:
Rat INS-1 insulinoma cells were cultured. The content of insulin in the culture medium was measured with ELISA assay. GLP-1R gene in INS-1 cells was knocked down with shRNA interference. The level of GLP-1R protein in INS-1 cells was measured with Western blotting.
Results:
Geniposide (0.01–100 μmol/L) increased insulin secretion from INS-1 cells in a concentration-dependent manner. Geniposide (10 μmol/L) enhanced acute insulin secretion in response to both the low (5.5 mmol/L) and moderately high levels (11 mmol/L) of glucose. Blockade of GLP-1R with the GLP-1R antagonist exendin (9–39) (200 nmol/L) or knock-down of GLP-1R with shRNA interference in INS-1 cells decreased the effect of geniposide (10 μmol/L) on insulin secretion stimulated by glucose (5.5 mmol/L).
Conclusion:
Geniposide increases insulin secretion through glucagon-like peptide 1 receptors in rat INS-1 insulinoma cells.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ Biomedical and Life Sciences
/ Diabetes Mellitus, Type 2 - drug therapy
/ Diabetes Mellitus, Type 2 - metabolism
/ Glucagon-Like Peptide 1 - genetics
/ Glucagon-Like Peptide 1 - metabolism
/ Islets of Langerhans - drug effects
/ Islets of Langerhans - metabolism
/ Original
/ Plant Extracts - pharmacology
/ Rats
/ RNA, Small Interfering - genetics
/ Vaccine
