Adiponectin up-regulates the expression of T-cadherin in cardiomyocytes injured by hypoxia/reoxygenation.
- Author:
Min WANG
1
;
Ying-Ru CHAI
;
Chuan-Shi XIAO
;
Xu-Jing ZHAO
;
Na WEI
;
Rui BAI
;
Yun-Fei BIAN
Author Information
1. Department of Cardiology, the Second Affiliated Hospital of Shanxi Medical University, Taiyuan, China.
- Publication Type:Journal Article
- MeSH:
Adiponectin;
pharmacology;
Animals;
Apoptosis;
Cadherins;
metabolism;
Cell Hypoxia;
L-Lactate Dehydrogenase;
metabolism;
Myocytes, Cardiac;
drug effects;
metabolism;
pathology;
Oxygen;
adverse effects;
Rats;
Rats, Sprague-Dawley;
Up-Regulation
- From:
Acta Physiologica Sinica
2012;64(3):296-302
- CountryChina
- Language:Chinese
-
Abstract:
The aim of the present study was to investigate the effects of adiponectin (APN) on the expression of T-cadherin in cultured Sprague-Dawley (SD) rat cardiomyocytes injured by hypoxia/reoxygenation (H/R). Primary myocardial cells from neonatal rats were obtained by enzymatic digestion. The cells were divided into control group, H/R group and H/R+APN (3, 10, 20 and 30 μg/mL) groups. The H/R group was incubated in anoxic environment (anoxic solution saturated with high concentration N2) for 3 h, and then in the reoxygenation environment (the reoxygenation solution saturated with pure oxygen) for 1 h. The H/R+APN group was pretreated with different concentrations of APN for 24 h prior to the initiation of H/R. The content of lactate dehydrogenase (LDH) was measured by chemistry chromatometry. Cellular apoptosis was analyzed by flow cytometry and terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL). The expression of T-cadherin was detected by RT-PCR and Western blotting. The results showed that, compared with control group, the apoptotic rate and release of LDH were significantly increased in the H/R group, whereas the expressions of T-cad mRNA and protein were decreased. Pretreating with APN significantly and dose-dependently decreased apoptotic rate and LDH release, and up-regulated T-cad mRNA and protein level in rat neonatal cardiomyocytes under H/R conditions. These results suggest that APN may protect cardiomyocytes against H/R-induced injury by up-regulating H/R-decreased T-cad expression.
