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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Thymineless death in colon carcinoma cells is mediated via Fas signaling
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Thymineless death in colon carcinoma cells is mediated via Fas signaling

机译:结肠癌细胞中无胸腺嘧啶的死亡通过Fas信号转导介导

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摘要

Fas is expressed constitutively in colonic epithelial cells and is also expressed in colon carcinomas and in cultured colon carcinoma cell lines. However, the potential role of Fas signaling in mediating apoptosis in cells of this type remains unknown. We have developed human colon carci- noma cell models deficient in thymidylate synthase that demonstrate acute (TS~- cells) or delayed (Thy4 cells) apo- ptosis following DNA damage induced by thymineless stress. Complete protection of cells from acute apoptosis and pro- longation of delayed apoptosis was obtained following expo- sure to the NOK-1 monoclonal antibody (inhibitory to Fas signaling) during the period of dThd deprivation.
机译:Fas在结肠上皮细胞中组成性表达,在结肠癌和培养的结肠癌细胞系中也表达。但是,Fas信号介导这种类型的细胞凋亡的潜在作用仍然未知。我们开发了缺乏胸苷酸合酶的人结肠癌细胞模型,该模型显示了无胸腺嘧啶应激诱导的DNA损伤后的急性(TS〜-细胞)或延迟的(Thy4细胞)凋亡。在dThd剥夺期间暴露于NOK-1单克隆抗体(抑制Fas信号转导)后,可以完全保护细胞免受急性凋亡和延迟凋亡的延长。

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