期刊
INFLAMMATION
卷 37, 期 3, 页码 729-737出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10753-013-9791-z
关键词
GW501516; PPAR beta/delta; TAK1-NF kappa B pathway; peritonitis; peritoneal fibrosis
Peritoneal fibrosis is a common consequence of long-term peritoneal dialysis (PD), and peritonitis is a factor in its onset. Agonist-bound peroxisome proliferator-activated receptors (PPARs) function as key regulators of energy metabolism and inflammation. Here, we examined the effects of PPAR beta/delta agonist GW501516 on peritonitis in a rat peritoneal fibrosis model. Peritoneal fibrosis secondary to inflammation was induced into uremic rats by daily injection of Dianeal 4.25 % PD solutions along with six doses of lipopolysaccharide before commencement of GW501516 treatment. Normal non-uremic rats served as control, and all rats were fed with a control diet or a GW501516-containing diet. Compared to control group, exposure to PD fluids caused peritoneal fibrosis that was accompanied by increased mRNA levels of monocyte chemoattractant protein-1, tumor necrotic factor-alpha, and interleukin-6 in the uremic rats, and these effects were prevented by GW501516 treatment. Moreover, GW501516 was found to attenuate glucose-stimulated inflammation in cultured rat peritoneal mesothelial cells via inhibition of transforming growth factor-beta-activated kinase 1 (TAK1), and nuclear factor kappa B (NF kappa B) signaling pathway (TAK1-NF kappa B pathway), a main inflammation regulatory pathway. In conclusion, inhibition of TAK1-NF kappa B pathway with GW501516 may represent a novel therapeutic approach to ameliorate peritonitis-induced peritoneal fibrosis for patients on PD.
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