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神经酰胺逆转SGC7901/DDP耐药的实验研究

Experimental study of ceramide in reversing multidrug resistance in SGC7901/DDP cells
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摘要 目的 观察神经酰胺(ceramide,Cer)对人胃癌耐顺铂(cisplatin,DDP)细胞的耐药逆转作用并对其机制进行初步探讨.方法 体外培养SGC7901/DDP细胞后给予外源性Cer及DDP干预,通过MTT、流式细胞仪观察肿瘤细胞增殖、凋亡、周期阻滞情况,免疫细胞化学染色检测细胞Bcl-2、Bax蛋白表达的改变.结果 单独使用DDP 2.5 mg/L、Cer 2.5 μmol/L组细胞增殖、周期阻滞、细胞凋亡、蛋白表达与对照组相比无统计学差异.Cer 2.5 μmol/L预处理后给予DDP 2.5 mg/L可抑制细胞增殖,作用均强于单独使用Cer及DDP组;Cer 5 μmol/L联合DDP 2.5 mg/L组作用强于Cer 2.5 μmol/L联合DDP 2.5 mg/L组.Cer 2.5 μmol/L+DDP 2.5 mg/L组凋亡率为(19.898±2.003)%,与对照组[(11.930±1.973)%]相比有统计学差异(P〈0.05),与单独使用Cer及DDP组相比也有统计学差异(P〈0.05).Cer 2.5 μmol/L预处理后给予DDP 2.5 mg/L Bcl-2表达下降、Bax表达上调,Bcl-2/ Bax比值下降,与单独使用Cer及DDP组相比有统计学差异(P〈0.05).Cer 2.5 μmol/L预处理后给予DDP 2.5 mg/L出现细胞周期阻滞作用,G0/G1期细胞增多,S期细胞减少,与单独使用Cer及DDP组相比出现统计学差异(P〈0.05).结论 Cer逆转了DDP的耐药作用,其中Cer逆转了DDP的凋亡耐药与改变Bcl-2/Bax比值有关.
出处 《徐州医学院学报》 CAS 2011年第8期519-523,共5页 Acta Academiae Medicinae Xuzhou
基金 江苏省卫生厅课题(Z201016) 江苏省"六大人才高峰"第七批次项目(032)
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