【摘要】 目的探讨脂氧合酶抑制剂NDGA体外诱导HT-29结肠癌细胞凋亡机制。方法RT-PCR检测NDGA处理后HT-29结肠癌细胞5-脂氧合酶信使核糖核酸(5-LOXmRNA)和端粒酶催化活性亚单位(hTERTmRNA)表达水平变化,激光共焦显微镜观察细胞内游离钙变化。结果结肠癌HT-29细胞5-LOXmRNA和hTERTmRNA呈阳性表达,随着NDGA药物浓度的增大,细胞凋亡率的上升,5-LOXm-RNA和hTERTmRNA表达水平逐步下降。细胞内钙浓度同步上升。结论NDGA诱导凋亡是多方面因素共同作用的结果,5-LOX、端粒酶、游离钙都可能参与其诱导凋亡的过程。更多还原

【Abstract】 Objective:To find out the apoptosis mechanism of HT-29 colon cancer cell induced by NDGA,the lipoxygenase inhibitor in vitro.Methods:We applied respectively:RT-PCR to detect colon cancer cell’s expression of 5-LOX messenger ribonucleic acid(5-LOXmRNA) and that of messenger ribonucleic acid about human telomerase reverse transcriptase(hTERTmRNA)respectively,confocal laser scanning electron microscope to examine intracellular free calcium.Results:Colon cancer cell lines HT-29 showed positive expression of 5-LOXmRNA.This expression became weaker following the rise of cell’s apoptosis and so were hTERTmRNA.Intracellular Free calcium increased following the rise of cell’s apoptosis.Conclusion:The apoptosis of tumor cell is caused by a combination of factors,with 5-LOX,telomerase and free calcium all active in the course.更多还原