Adiponectin up-regulates the expression of T-cadherin in cardiomyocytes injured by hypoxia/reoxygenation / 生理学报
Acta Physiologica Sinica
;
(6): 296-302, 2012.
Article
in Chinese
| WPRIM
| ID: wpr-335910
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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Oxygen
/
Pathology
/
Pharmacology
/
Cadherins
/
Cell Hypoxia
/
Up-Regulation
/
Rats, Sprague-Dawley
/
Apoptosis
/
Myocytes, Cardiac
/
Adiponectin
Limits:
Animals
Language:
Chinese
Journal:
Acta Physiologica Sinica
Year:
2012
Type:
Article
Similar
MEDLINE
...
LILACS
LIS