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[Involvement of HIF-1 in the migration-promoting effects of hydrogen sulfide in vascular endothelial cells under normoxic conditions.] [Article in Chinese]

TAO Bei-Bei, ZHANG Cai-Cai, LIU Shu-Yuan, ZHU Yi-Chun^*

Department of Physiology and Pathophysiology, Fudan University Shanghai Medical College, Shanghai 200032, China

Abstract

The purpose of this study was to investigate the molecular mechanisms whereby hydrogen sulfide (H2S) exerts the promoting effect on vascular endothelial cells migration. We used wound healing assay to study the effect of NaHS (H2S donor) on the migration ability of rhesus retinal pigment epithelial cell line, RF/6A cells, under normoxic conditions. Real-time PCR was used to measure hypoxia-inducible factor 1α (HIF-1α) mRNA level. Western blot was used to measure the expression of HIF-1α protein. The probe 2’,7’-dichlorofluorescein diacetate (DCFH-DA) was used to measure intracellular reactive oxygen species (ROS) level. The results showed that NaHS (10–100 μmol/L) could significantly promote RF/6A cells migration under normoxic conditions, and this effect could be inhibited by 50 µmol/L HIF-1 inhibitor, CdCl2. NaHS increased the protein level of HIF-1α in a dose- and time-dependent manner, and up-regulated the mRNA level of HIF-1α quickly and continuously. Moreover, NaHS could significantly decrease ROS levels in RF/6A cells under normoxic conditions. These results suggest HIF-1 may mediate the promoting effect of H2S on vascular endothelial cells migration under normoxic conditions. ROS, as an upstream regulator of HIF-1α, may be involved in the migration-promoting effect of H2S.

Key words: hydrogen sulfide; endothelial cell; hypoxia-inducible factor 1; reactive oxygen species

Received: 2012-02-17　　Accepted: 2012-04-01

Corresponding author: 朱依纯　　E-mail: yczhu@shmu.edu.cn

Citing This Article：

TAO Bei-Bei, ZHANG Cai-Cai, LIU Shu-Yuan, ZHU Yi-Chun. [Involvement of HIF-1 in the migration-promoting effects of hydrogen sulfide in vascular endothelial cells under normoxic conditions.] [Article in Chinese]. Acta Physiol Sin 2012; 64 (2): 129-134 (in Chinese with English abstract).