scholarly journals Role of ceramide in activation of stress-associated MAP kinases by minimally modified LDL in vascular smooth muscle cells

Author(s):  
Alexandra Loidl ◽  
Ralf Claus ◽  
Elisabeth Ingolic ◽  
Hans-Peter Deigner ◽  
Albin Hermetter
PLoS ONE ◽  
2010 ◽  
Vol 5 (3) ◽  
pp. e9800 ◽  
Author(s):  
Santiago Redondo ◽  
Emilio Ruiz ◽  
Antonio Gordillo-Moscoso ◽  
Jorge Navarro-Dorado ◽  
Marta Ramajo ◽  
...  

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Xiaoqiang Qi ◽  
Yujing Zhang ◽  
Jing Li ◽  
Dongxia Hou ◽  
Yang Xiang

We assessed the role of PGC-1α (PPARγ coactivator-1 alpha) in glucose-induced proliferation, migration, and inflammatory gene expression of vascular smooth muscle cells (VSMCs). We carried out phagocytosis studies to assess the role of PGC-1α in transdifferentiation of VSMCs by flow cytometry. We found that high glucose stimulated proliferation, migration and inflammatory gene expression of VSMCs, but overexpression of PGC-1α attenuated the effects of glucose. In addition, overexpression of PGC-1α decreased mRNA and protein level of VSMCs-related genes, and induced macrophage-related gene expression, as well as phagocytosis of VSMCs. Therefore, PGC-1α inhibited glucose-induced proliferation, migration and inflammatory gene expression of VSMCs, which are key features in the pathology of atherosclerosis. More importantly, PGC-1α transdifferentiated VSMCs to a macrophage-like state. Such transdifferentiation possibly increased the portion of VSMCs-derived foam cells in the plaque and favored plaque stability.


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