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3-溴丙酮酸促进胃癌细胞凋亡的机制

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摘要 目的探讨3-溴丙酮酸(3-BrPA)抑制胃癌细胞生长并诱导凋亡的作用机制。方法将胃癌细胞MGC-803分为以纯培养基培养为阴性对照,3-BrPA低、中、高剂量处理和5氟尿嘧啶(5-FU)作为阳性对照。分别以0、4、6、8μg/m L的3-BrPA及0.5 mmol/L的5-FU处理。药物作用24、48 h后,MTT法检测细胞生长抑制率,流式细胞术检测细胞凋亡率,酶偶联法检测细胞内乳酸含量及HK活性,Real-time PCR检测Bcl-2、BaX和Cyt-c的mRNA表达。结果 MTT结果和凋亡检测结果表明,随着3-Br PA浓度增加、作用时间延长,细胞生长抑制率和凋亡率也随之增大(P<0.05)。酶偶联检测结果显示,随3-BrPA浓度增加、作用时间延长,细胞内乳酸含量及HK的活性是降低的,且呈浓度依赖性(P<0.05);Real-time PCR结果显示随3-Br PA浓度增加,Ba X和Cyt-c的mRNA表达量升高,而Bcl-2的mRNA表达量降低(P<0.05)。结论 3-Br PA对MGC-803细胞的生长抑制作用和促凋亡作用可能与其能抑制MGC-803细胞内关键酶HK的活性,降低糖酵解效率,并通过激活线粒体凋亡通路相关。
出处 《广东医学》 CAS 北大核心 2016年第2期188-190,共3页 Guangdong Medical Journal
基金 国家自然科学基金资助项目(编号:81260366)
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