期刊
HORMONE AND METABOLIC RESEARCH
卷 44, 期 1, 页码 33-40出版社
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0031-1295416
关键词
islet regeneration; partial pancreatectomy; ginsenoside Rh2 (GS-Rh2); cyclin D-Cdk4 complex; Akt/Foxo1/PDX-1 signaling pathway
资金
- National Natural Science Foundation of China [81173093, J1103518, 30970643]
The present study was designed to determine the antihyperglycemic function of ginsenoside Rh2 (GS-Rh2) by the regeneration of beta-cells in mice that underwent 70 % partial pancreatectomy (PPx), and to explore the mechanisms of GS-Rh2-induced beta-cell proliferation. Adult C57BL/6J mice were subjected to PPx or a sham operation. Within 14 days post-PPx, mice that underwent PPx received GS-Rh2 (1 mg/kg body weight) or saline injection. GS-Rh2-treated mice exhibited an improved glycemia and glucose tolerance, an increased serum insulin levels, and beta-cell hyperplasia. Meanwhile, increased beta-cell proliferation percentages and decreased beta-cell apoptosis percentages were also observed in GS-Rh2-treated mice. Further studies on the Akt/Foxo1/PDX-1 signaling pathway revealed that GS-Rh2 probably induced beta-cell proliferation via activation of Akt and PDX-1 and inactivation of Foxo1. Studies on the abundance and activity of cell cycle proteins suggested that GS-Rh2-induced beta-cell proliferation may ultimately be achieved through the regulation of cell cycle proteins. These findings demonstrate that GS-Rh2 administration could inhibit the tendency of apoptosis, and reverse the impaired beta-cell growth potential by modulating Akt/Foxo1/PDX-1 signaling pathway and regulating cell cycle proteins. Induction of islet beta-cell proliferation by GS-Rh2 suggests its therapeutic potential in the treatment of diabetes.
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