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SFRP5逆转白血病多药耐药性的研究 被引量:2

SFRP5 reversal multidrug resistance in leukemia KG1a cells
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摘要 目的:研究分泌型卷曲相关蛋白5(secreted frizzled related protein 5,SFRP5)对P-糖蛋白(P-glycoprotein,P-gp)介导的白血病多药耐药性的作用。方法:采用转基因方法构建过表达SFRP5的KG1a/SFRP5细胞,real-time PCR检测MDR1 mRNA表达,Western blot检测细胞P-gp表达。免疫荧光显微镜观察细胞膜表面P-gp表达。流式细胞仪检测细胞内药物浓度。MTT方法检测细胞耐药性。结果:与KG1a细胞及表达绿色荧光蛋白的KG1a/eGFP细胞相比,KG1a/SFRP5细胞中MDR1 mRNA水平显著下降(P<0.01),总P-gp表达水平亦被下调,细胞膜表面P-gp荧光强度减弱,细胞内的罗丹明浓度显著升高(P<0.01),对ADR的IC50显著降低(P<0.01),细胞耐药性下降。结论:SFRP5蛋白表达可以下调MDR1转录及P-gp表达,增加细胞内药物浓度,逆转白血病多药耐药。 Objective: To investigate the effect of secreted frizzled-related protein 5 (SFRP5) on leukemic multidrug resistance. Methods: Transgenic methods were used to culture KGla cells expressing SFRP5 and enhanced green fluorescent protein (control). mdrl mRNA expression in KGla, KGla/eGFP, and KGla/SFRP5 groups were detected by real-time polymerase chain reaction. P-glycoprotein (P-gp) expression was detected by Western blot analysis. P-gp expression on the cell surface was observed by immunofluorescence. In- tracellular drug concentration was detected by flow cytometry. Drug resistance was detected by MTT assay. Results: The KG 1 aJSFRP5 cell, a KGla cell expressing SFRP5, and the KGla/eGFP cell, a KGla cell expressing eGFP, were successfully constructed. The multidrug resistance protein 1 (mdrl) mRNA level in KGlaJSFRP5 cells was significantly decreased (P〈0.01). P-gp expression in KGla/SFRP5 cells was also downregulated. Fluorescence intensity of P-gp on the KGla/SFRP5 cell surface was reduced. Rhodamine concentration in KGlaJ SFRP5 cell was significantly increased (P〈0.01). ICs0 of KGlaJSFRP5 cell to Adriamycin was decreased as determined by the MTT method. Conclusion: SFRP5 expression in KGla cells can downregulate MDR1 transcription and P-gp expression, increase intracellular drug concentration, and reverse multidrug resistance.
出处 《中国肿瘤临床》 CAS CSCD 北大核心 2013年第6期308-311,共4页 Chinese Journal of Clinical Oncology
基金 国家自然科学基金项目(编号:81100376)资助~~
关键词 分泌型卷曲相关蛋白5 白血病 多药耐药性P-糖蛋白 secreted frizzled-related protein 5, leukemia, multidrug, P-glycoprotein
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