A Study on the Efffects of Phosphatidylinositol-3 Kinase Inhibitor Wortmannin on Leukemia Cells Proliferation and Apoptosis Resistance Mediated by bcr/abl
- Author:
- No author available
- Journal Title:
- JOURNAL OF CHINESE PHYSICIAN
- Issue:
- 5
- DOI:
- 10.3760/cma.j.issn.1008-1372.2005.05.001
- Key Word:
- 白血病;bcr/abl基因;信号传导通路;磷酰肌醇-3激酶;Wortmannin
Abstract： 目的探讨磷酰肌醇-3激酶(PI3K)途径在K562、NB4和HL60细胞增殖和凋亡抗性中的不同作用.方法用磷酰肌醇-3激酶(PI3K)特异抑制剂Wortmannin(WT)抑制PI3K活性,经细胞生长曲线测定、半固体集落形成实验、流式细胞膜联蛋白V(Annexin-V-Flous)标记技术检测细胞凋亡百分比和凋亡指数.观察K562、NB4和HL60细胞增殖能力及凋亡抗性的变化.结果 K562、NB4和HL60细胞在24、48、72h的增殖抑制率分别为41.33%、57.46%、65.85%和26.29%、5.51%、2.10%及32.14%、17.14%、13.14%.生长曲线显示WT抑制PI3K途径可显著抑制K562细胞的增殖,对NB4和HL60细胞增殖无明显影响.K562、NB4和HL60细胞加和不加WT,培养14d后的集落形成率分别为:16.15%和7.60%,5.90%和6.10%,6.60%和6.40%.集落形成抑制率为52.94%、3.39%和3.03%.K562、NB4和HL60细胞加WT、AraC、WT+AraC作用24h后的凋亡细胞百分比分别为(17.27±1.94)%、(23.25±14.12)%、(17.60±1.27)%;(17.00±3.36)%、(20.55±8.57)%、(22.07±5.62)%;(27.60±4.36)%、(17.56±9.28)%、(20.50±7.97)%.凋亡指数分别为(6.88±2.66)、(7.79±2.75)、(3.03±0.56);(8.91±3.86)、(9.35±4.19)、(3.79±0.93);(13.39±4.49)、(7.61±6.35)、(5.27±2.69).结论 WT可以通过抑制PI3K通路抑制K562细胞的增殖,促进K562细胞的凋亡,PI-3K途径是bcr/abl基因介导的白血病细胞增殖和抗凋亡的重要信号传导通路.
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