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Université de Fribourg

Inhibition of p38mapk reduces adipose tissue inflammation in aging mediated by arginase-II

Huang, Ji ; Liu, Chang ; Ming, Xiu-Fen ; Yang, Zhihong

In: Pharmacology, 2020, vol. 105, no. 9–10, p. 491–504

Background: Adipose tissue inflammation occurs not only in obesity but also in aging and is mechanistically linked with age-associated diseases. Studies show that ablation of the l-arginine-metabolizing enzyme arginase-II (Arg-II) reduces adipose tissue inflammation and improves glucose tolerance in obesity. However, the role of Arg-II in aging adipose tissue inflammation is not clear....

Université de Fribourg

Arginase‐II promotes melanoma migration and adhesion through enhancing hydrogen peroxide production and STAT3 signaling

Yu, Yi ; Ladeiras, Diogo ; Xiong, Yuyan ; Boligan, Kayluz Frias ; Liang, Xiujie ; Gunten, Stephan ; Hunger, Robert E. ; Ming, Xiu‐Fen ; Yang, Zhihong

In: Journal of Cellular Physiology, 2020, p. jcp.29814

Elevated arginase type II (Arg‐II) associates with higher grade tumors. Its function and underlying molecular mechanisms in melanoma remain elusive. In the present study, we observed a significantly higher frequency of Arg‐II expression in melanoma of patients with metastasis than those without metastasis. Silencing Arg‐II in two human melanoma cell lines slowed down the cell growth,...

Université de Fribourg

Myosin 1b regulates nuclear AKT activation by preventing localization of PTEN in the nucleus

Yu, Yi ; Xiong, Yuyan ; Ladeiras, Diogo ; Yang, Zhihong ; Ming, Xiu-Fen

In: iScience, 2019, vol. 19, p. 39–53

Insulin-induced AKT activation is dependent on phosphoinositide 3-kinase and opposed by tumor suppressor phosphatase and tensin homolog (PTEN). Our previous study demonstrates that myosin 1b (MYO1B) mediates arginase-II-induced activation of mechanistic target of rapamycin complex 1 that is regulated by AKT. However, the role of MYO1B in AKT activation is unknown. Here we show that silencing...

Université de Fribourg

Hypoxia enhances endothelial intercellular adhesion molecule 1 protein level through upregulation of arginase type II and mitochondrial oxidative stress

Liang, Xiujie ; Arullampalam, Prakash ; Yang, Zhihong ; Ming, Xiu-Fen

In: Frontiers in Physiology, 2019, vol. 10, p. -

Hypoxia plays a crucial role in the pathogenesis of cardiovascular diseases. Mitochondrial enzyme arginase type II (Arg-II) is reported to lead to endothelial dysfunction and enhance the expression of endothelial inflammatory adhesion molecules such as intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1). In this study, we investigate the role of Arg-II in...

Université de Fribourg

MAGI1 mediates eNOS activation and NO production in endothelial cells in response to fluid shear stress

Ghimire, Kedar ; Zaric, Jelena ; Alday-Parejo, Begoña ; Seebach, Jochen ; Bousquenaud, Mélanie ; Stalin, Jimmy ; Bieler, Grégory ; Schnittler, Hans-Joachim ; Rüegg, Curzio

In: Cells, 2019, vol. 8, no. 5, p. 388

Fluid shear stress stimulates endothelial nitric oxide synthase (eNOS) activation and nitric oxide (NO) production through multiple kinases, including protein kinase A (PKA), AMP-activated protein kinase (AMPK), AKT and Ca2+/calmodulin-dependent protein kinase II (CaMKII). Membrane-associated guanylate kinase (MAGUK) with inverted domain structure-1 (MAGI1) is an adaptor protein that...

Consortium of Swiss Academic Libraries

Immunological aspects of atherosclerosis

Garrido-Urbani, S. ; Meguenani, M. ; Montecucco, F. ; Imhof, B.

In: Seminars in Immunopathology, 2014, vol. 36, no. 1, p. 73-91