Effects of stanniocalcin-1 and hypoxia-inducible factor-1α on mitochondrial membrane potential stability in renal carcinoma cells.
- Author:
Qing-tao YANG
1
;
Jiang GU
1
;
Yong-chun ZHANG
1
;
Zhi-hui ZHU
1
;
Yong-an YANG
1
;
Nan WANG
1
;
Qing-liang ZHU
2
Author Information
- Publication Type:Journal Article
- MeSH: Calcium; metabolism; Carcinoma, Renal Cell; pathology; Glycoproteins; pharmacology; Humans; Hypoxia-Inducible Factor 1, alpha Subunit; metabolism; Membrane Potential, Mitochondrial; drug effects; Tumor Cells, Cultured
- From: Acta Academiae Medicinae Sinicae 2014;36(1):12-19
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo explore the effects of stanniocalcin-1 (STC-1) and hypoxia-inducible factor-1α (HIF-1α) on the calcium and thus on the mitochondrial membrane potential (Δψm) in renal carcinoma cells.
METHODSWe successfully established the renal carcinoma cell models with high HIF-1α gene expression. After various concentrations of STC-1 solutions were added to the culture medium, the proliferation of cells, expressions of HIF-1α and STC-1, levels of Ca(2+), Δψm, and mPTP were detected by MTT, RT-PCR, ELISA, fluorescence spectrophotometry, and ultraviolet spectrophotometry, respectively.
RESULTSThe proliferation of renal carcinoma cells and Δψm were improved after HIF-1α gene transfection, STC-1 protein intervention, and STC-1 protein intervention after gene transfection. While the intracellular Ca(2+) level and mPTP were decreased significantly (P<0.05), all the changes were intensified with the gradual increase of STC-1. However, the increasing trend of cell proliferation gradually declined.
CONCLUSIONHIF-1α may participate in malignant proliferation of renal carcinoma cells by promoting STC-1 proliferation or down-regulating Ca(2+); however, such an effect may be gradually attenuated due to the inhibitory effect of STC-1 on HIF-1α.