An Angiotensin II Type 1 Receptor Blocker Prevents Renal Injury via Inhibition of the Notch Pathway in Ins2 Akita Diabetic Mice

作者：Koshizaka Masaya; Takemoto Minoru^*; Sato Seiya; Tokuyama Hirotake; Fujimoto Masaki; Okabe Emiko; Ishibashi Ryoichi; Ishikawa Takahiro; Tsurutani Yuya; Onishi Shunichiro; Mezawa Morito; He Peng; Honjo Satoshi; Ueda Shiro; Saito Yasushi; Yokote Koutaro

来源：Experimental Diabetes Research, 2012, 159874.

DOI：10.1155/2012/159874

Recently, it has been reported that the Notch pathway is involved in the pathogenesis of diabetic nephropathy. In this study, we investigated the activation of the Notch pathway in Ins2 Akita diabetic mouse (Akita mouse) and the effects of telmisartan, an angiotensin II type1 receptor blocker, on the Notch pathway. The intracellular domain of Notch1 (ICN1) is proteolytically cleaved from the cell plasma membrane in the course of Notch activation. The expression of ICN1 and its ligand, Jagged1, were increased in the glomeruli of Akita mice, especially in the podocytes. Administration of telmisartan significantly ameliorated the expression of ICN1 and Jagged1. Telmisartan inhibited the angiotensin II-induced increased expression of transforming growth factor beta and vascular endothelial growth factor A which could directly activate the Notch signaling pathway in cultured podocytes. Our results indicate that the telmisartan prevents diabetic nephropathy through the inhibition of the Notch pathway.

• 出版日期2012