2001•肿瘤研究与临床Requires access

APOPTOSIS INDUCED BY TNF-α COMBINED WITH 5-Fu AND WITH EXPRESSION OF BCL-2 GENE IN COLON CANCER CELLS

周志宏, 郑建伟, 商少宏, 沈志祥, 罗和生

Abstract

目的:研究重组人肿瘤坏死因子α(rhTNF-α)和5-Fu联合诱导结肠癌细胞凋亡及其对bcl-2基因表达的影响.方法:应用MTT法检测TNF-α、5-Fu对结肠癌细胞SW-480的细胞毒作用;应用末端标记法(TUNEL法)研究结肠癌SW-480细胞凋亡;应用免疫组化法研究bcl-2基因的表达.结果:3×106U/L的rhTNF-α联合不同剂量的5-Fu作用于SW-480细胞48 h后对SW-480细胞生长具有协同抑制作用;联合应用3×106U/L的TNF-α,125 mg/L的5-Fu作用于SW-480细胞48 h后,TUNEL法显示染色阳性细胞比对照组显著增加(P＜0.01);免疫组化结果显示,联合用药组bcl-2基因表达阳性的细胞百分率较对照组显著减低(P＜0.01).结论:联合应用TNF-α、5-Fu有协同诱导SW-480细胞凋亡及抑制bcl-2基因的表达的作用.

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Key concepts: Apoptosis, Tumor necrosis factor alpha, Cancer research, Gene expression, Gene, Cancer, Colorectal cancer, Expression (computer science)