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Effects of Glucagon-Like Peptide 1 on PDX-1, PAX-6 and NKx2.2 Gene Expressions in Isolated Pancreatic Islets
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    Objective: To observe the effect of glucagon-like peptide 1 (GLP-1) on the gene expressions of transcription factors (PDX-1, PAX-6 and NKx2.2) in freshly isolated rat pancreatic islets and investigate the associated physiological and therapeutic implication of GLP-1. Methods: The isolated rat islets were incubated with 10 nmol/L GLP-1 for 1, 3 and 5 days, respectively. Total cellular RNA was extracted and the expressions of PDX-1, PAX-6 and NKx2.2 gene were detected by semiquantity RT-PCR. Results: Compared with the control group, the PDX-1, PAX-6 and NKx2.2 gene expressions were significantly increased after co-cultured with GLP-1 for 1 day (P < 0.05). The effect was shown in a time-dependent manner. All three gene expressions reached the peak on the 5th day. Conclusion: GLP-1 can improve the function of pancreatic islet by regulating the gene expressions of transcription factors in β cells.

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Dai Cui, Wei Tang, Cuiping Liu, Kuanfeng Xu, Chao Liu.[J].南京医科大学学报(自然科学版),2006,20(3):

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