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Targeting arginase-II protects mice from high-fat-diet-induced hepatic steatosis through suppression of macrophage inflammation

Liu, Chang ; Rajapakse, Angana G. ; Riedo, Erwin ; Fellay, Benoit ; Bernhard, Marie-Claire ; Montani, Jean-Pierre ; Yang, Zhihong ; Ming, Xiu-Fen

In: Scientific Reports, 2016, vol. 6, p. 20405

Nonalcoholic fatty liver disease (NAFLD) associates with obesity and type 2 diabetes. Hypoactive AMP-activated protein kinase (AMPK), hyperactive mammalian target of rapamycin (mTOR) signaling, and macrophage-mediated inflammation are mechanistically linked to NAFLD. Studies investigating roles of arginase particularly the extrahepatic isoform arginase-II (Arg-II) in...

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P38 mitogen-activated protein kinase is involved in arginase-II-mediated eNOS-Uncoupling in Obesity

Yu, Yi ; Rajapakse, Angana G. ; Montani, Jean-Pierre ; Yang, Zhihong ; Ming, Xiu-Fen

In: Cardiovascular Diabetology, 2014, vol. 13, no. 1, p. 113

Background Endothelial nitric oxide synthase (eNOS)-uncoupling links obesity-associated insulin resistance and type-II diabetes to the increased incidence of cardiovascular disease. Studies have indicated that increased arginase is involved in eNOS-uncoupling through competing with the substrate L-arginine. Given that arginase-II (Arg-II) exerts some of its biological functions through crosstalk...

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Positive crosstalk between arginase-II and S6K1 in vascular endothelial inflammation and aging

Yepuri, Gautham ; Velagapudi, Srividya ; Xiong, Yuyan ; Rajapakse, Angana G. ; Montani, Jean-Pierre ; Ming, Xiu-Fen ; Yang, Zhihong

In: Aging Cell, 2012, p. -

Augmented activities of both arginase and S6K1 are involved in endothelial dysfunction in aging. This study was to investigate whether or not there is a crosstalk between arginase and S6K1 in endothelial inflammation and aging in senescent human umbilical vein endothelial cells and in aging mouse models. We show increased arginase-II (Arg-II) expression/activity in senescent endothelial cells....

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