- VernacularTitle:脂筏介导的内源性大麻素对HepG2细胞的作用及其机制
- Author:
Wen-Jie WU
1
;
Qiao YANG
;
Qin-Fang CAO
;
Yao-Wen ZHANG
;
Yu-Jia XIA
;
Xiao-Wen HU
;
Wang-Xian TANG
Author Information
- Publication Type:Journal Article
- MeSH: Amidohydrolases; metabolism; Arachidonic Acids; pharmacology; Cannabinoid Receptor Modulators; pharmacology; Cholesterol; metabolism; Endocannabinoids; Hep G2 Cells; Humans; JNK Mitogen-Activated Protein Kinases; metabolism; Necrosis; Polyunsaturated Alkamides; pharmacology; Receptor, Cannabinoid, CB1; metabolism; Receptor, Cannabinoid, CB2; metabolism; Signal Transduction; beta-Cyclodextrins; pharmacology; p38 Mitogen-Activated Protein Kinases; metabolism
- From: Chinese Journal of Hepatology 2010;18(3):204-208
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo study the effect of anandamide (AEA) on necrosis in HepG2 cells and to explore the role of AEA in progression of liver cancer.
METHODSLocalization of the fatty acid hydrolytic enzyme (FAAH), cannabinoid receptors 1(CB1) and cannabinoid receptors 2 (CB2) proteins was detected in L02 and HepG2 cells using immunofluorescence. L02 and HepG2 cells were treated with different concentrations of AEA and methyl-beta-cyclodextrin, and the rates of cells necrosis were examined by PI stain. Meanwhile, the expression levels of FAAH, CB1 and CB2 receptor proteins, as well as P38 mitogen-activated protein kinase (p-P38 MAPK) and c-Jun-NH2-terminal kinase (p-JNK) proteins, were analyzed by Western blot.
RESULTSThe FAAH, CB1 and CB2 receptor proteins were observed both in cytoplasm and on membrane in L02 and HepG2 cells. The expression level of FAAH protein was higher in HepG2 than in L02 cells. The expression level of CB1 receptor protein was very low in both L02 and HepG2 cells. The expression level of CB2 receptor protein was high in both L02 and HepG2 cells. AEA treatment induced necrosis in HepG2 cells but not in L02 cells. Methyl-beta-cyclodextrin treatment prevented necrosis in HepG2 cells (t = 3.702; 5.274; 3.503, P less than 0.05). The expression patterns of FAAH, CB1 and CB2 receptor protein in L02 and HepG2 cells were confirmed by western blot, which were consistent with the immunofluorescence results. AEA treatment increased the levels of p-P38MAPK and p-JNK proteins in a dose-dependent manner in HepG2 cells (F = 11.908; 26.054, P less than 0.05) and the increase can be partially by prevented by MCD (t = 2.801; t = 12.829, P less than 0.05).
CONCLUSIONAEA treatment induces necrosis in HepG2 cells via CB1 and CB2 receptors and lipid rafts.