@article{APS9442,
author = {Yun-peng LI and Shu-lin WANG and Bei LIU and Lu TANG and Rong-ren KUANG and Xian-bao WANG and Cong ZHAO and Xu-dong SONG and Xue-ming CAO and Xiang WU and Ping-zhen YANG and Li-zi WANG and Ai-hua CHEN},
title = {Sulforaphane prevents rat cardiomyocytes from hypoxia/reoxygenation injury in vitro via activating SIRT1 and subsequently inhibiting ER stress},
journal = {Acta Pharmacologica Sinica},
volume = {37},
number = {3},
year = {2017},
keywords = {},
abstract = {Aim: Sulforaphane (SFN), a natural dietary isothiocyanate, is found to exert beneficial effects for cardiovascular diseases. This study aimed to investigate the mechanisms underlying the protective effects of SFN in a model of myocardial hypoxia/reoxygenation (H/R) injury in vitro.
Methods: Cultured neonatal rat cardiomyocytes pretreated with SFN were subjected to 3-h hypoxia followed by 3-h reoxygenation. Cell viability and apoptosis were detected. Caspase-3 activity and mitochondrial membrane potential (ΔΨm) was measured. The expression of ER stress-related apoptotic proteins were analyzed with Western blot analyses. Silent information regulator 1 (SIRT1) activity was determined with SIRT1 deacetylase fluorometric assay kit.
Results: SFN (0.1–5 μmol/L) dose-dependently improved the viability of cardiomyocytes, diminished apoptotic cells and suppressed caspase-3 activity. Meanwhile, SFN significantly alleviated the damage of ΔΨm and decreased the expression of ER stress-related apoptosis proteins (GRP78, CHOP and caspase-12), elevating the expression of SIRT1 and Bcl-2/Bax ratio in the cardiomyocytes. Co-treatment of the cardiomyocytes with the SIRT1-specific inhibitor Ex-527 (1 μmol/L) blocked the SFN-induced cardioprotective effects.
Conclusion: SFN prevents cardiomyocytes from H/R injury in vitro most likely via activating SIRT1 pathway and subsequently inhibiting the ER stress-dependent apoptosis.},
issn = {1745-7254}, url = {http://www.chinaphar.com/article/view/9442}
}