人白细胞介素1β通过caspase途径诱导人黑色素瘤A375-S2细胞凋亡  

Human interleukin-1β induces A375-S2 human melanoma apoptosis through caspase pathway

作　　者：王澈[1] 王敏伟[1] 田代真一[2] 小野寺敏 池岛乔[1] 

机构地区：[1]沈阳药科大学中日医学药学研究所,辽宁沈阳110016 [2]昭和药科大学病态科学教研室

出　　处：《中国病理生理杂志》2004年第7期1138-1143,共6页Chinese Journal of Pathophysiology

摘　　要：目的 :对interleukin - 1β(IL - 1β)诱导人黑色素瘤A375 -S2细胞凋亡的信号转导途径进行研究。 方法 :使用倒置显微镜观察细胞形态学变化。通过MTT法测定IL - 1β对A375 -S2细胞的抑制作用以及细胞内半胱氨酸蛋白酶 (caspases)与这种作用的关系。利用乳酸脱氢酶 (LDH)测定法对IL - 1β作用后细胞的损伤情况进行分析。琼脂糖凝胶电泳法检测IL - 1β对细胞DNA降解的影响。 结果 :IL - 1β对A375 -S2细胞的抑制作用呈剂量和时间依赖性 ,在 10 -9mol/L作用 72h时达到 90 %以上。caspase- 1、- 3、- 8、- 9和caspase - 10的抑制剂能够部分抑制IL -1β早期诱导的细胞凋亡。LDH活力测定显示 ,在IL - 1β诱导的细胞死亡过程中 ,凋亡占主导地位 ,并呈现剂量和时间依赖性。细胞经过 10 -11mol/LIL - 1β处理 72h后 ,出现凋亡典型的DNA梯状条带 ,与上述结果一致。 结论 :IL -1β能够诱导人黑色素瘤A375 -S2细胞凋亡 。AIM: To study the molecular biological mechanism and signal transduction pathway of interleukin-1β (IL-1β)-induced apoptosis in A375-S2 melanoma cells. METHODS: Photomicrocropy showed typical apoptotic changes. The cytotoxic effect of IL-1β in vitro and influences of caspases in this effect were measured by MTT assay. The cytotoxicity of cells was assessed by LDH-based assay. Degradation of DNA was detected by agarose gel electrophoresis. RESULTS: The inhibitory effect of IL-1β on A375-S2 cell growth was in a dose and time-dependent manner, and cell death rate reached more than 90% at 72 h after treatment with 10^(-9)mol/L IL-1β. The inhibitors of caspase-family, -1, -3, -8, -9, and -10, partially blocked cell death at early stage. LDH assay showed that major IL-1β-induced cell death was apoptosis, and in a dose and time-dependent manner. Typical apoptotic DNA ladder was observed in agarose gel electrophoresis. CONCLUSION: IL-1β induced apoptosis in melanoma A375-S2 cells by activating caspase pathway. [

关 键 词：白细胞介素1 黑色素瘤 A375-S2细胞 细胞凋亡 半胱氨酸天冬氨酸蛋白酶 

分 类 号：R739.5[医药卫生—肿瘤]