The effects of dexamethasone on the proliferation and apoptosis of human ovarian cancer cells induced by paclitaxel

Journal of Ovarian Research

Rong Zhang¹  Yuhong Han¹  Qian Dong¹  Huan Lu¹  Jianhua Guan¹  Wenjing Hou¹ 

[1] Department of Obstetrics and Gynecology, Shanghai Jiaotong University-Affiliated Sixth People’s Hospital of Fengxian Branch, 6600 Nanfeng Road, Shanghai 201499, People’s Republic of China

关键词: Survivin;    Paclitaxel;    Ovarian cancer;    Dexamethasone;    Cleaved caspase-3;    Bcl-XL;   

Others  :  1133157
DOI  :  10.1186/s13048-014-0089-z

 received in 2014-05-30, accepted in 2014-08-31,  发布年份 2014

【 摘 要 】

Background

Dexamethasone (DEX) has been routinely used as a pre-treatment in the clinical application of paclitaxel (PTX) to treat ovarian cancer. However, PTX-induced apoptosis might be inhibited by DEX. This study was undertaken to investigate the effects of DEX on the apoptosis induced by PTX.

Methods

Both of SKOV-3 and HO-8910 human ovarian cancer cells were divided into four groups: (1) untreated (Con); (2) treated with DEX (0.1 μM) alone; (3) treated with PTX (50 nM); and (4) pre-treated with DEX (0.1 μM), and 24 h later, treated with PTX (DEX + PTX). Cell proliferation was determined by the 3-(4,5)-dimethylthiahiazo (−z-y1)-3,5-di- phenytetrazoliumromide (MTT) dye uptake method, while cell apoptosis was analyzed by propidium iodide (PI) staining and flow cytometry. Then, reverse transcription polymerase chain reactions (RT-PCRs) were applied to semi-quantitative analysis, followed by western blot analysis. Statistical analysis was performed, with Fisher’s least significant difference test.

Results

Our results demonstrated that DEX can differentially inhibit SKOV-3 and HO-8910 cell proliferation induced by PTX and decrease the apoptosis rates in cancer cells. Pre-treatment with DEX could up-regulate the expressions of members of anti-apoptotic Bcl-2 family (Bcl-2 and Bcl-XL) and members of IAP family (survivin). The expression of cleaved caspase-3 was down-regulated by DEX, shown by semi-quantitative RT-PCRs and western blot analysis.

Conclusions

Our data gained invaluable insights of the antagonistic mechanisms of DEX on PTX-induced cancer cell death and may provide new methods of using DEX as antineoplastic drugs or agents in the clinical treatment for ovarian cancer patients.

【 授权许可】

   
2014 Hou et al.; licensee BioMed Central Ltd.

【 图 表 】

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