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
Dans Chinois
| 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.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Oxygène
/
Anatomopathologie
/
Pharmacologie
/
Cadhérines
/
Hypoxie cellulaire
/
Régulation positive
/
Rat Sprague-Dawley
/
Apoptose
/
Myocytes cardiaques
/
Adiponectine
Limites du sujet:
Animaux
langue:
Chinois
Texte intégral:
Acta Physiologica Sinica
Année:
2012
Type:
Article
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