全反式维甲酸和柔红霉素对NB4和HL-60细胞株VEGF表达及分泌的影响

目的　探讨在全反式维甲酸 (ATRA)和柔红霉素 (DNR)的分别作用下 ,白血病细胞株NB4和HL 6 0VEGFmRNA表达及VEGF蛋白分泌的变化。方法　应用RT PCR法和ELISA方法研究ATRA和DNR分别对NB4和HL 6 0细胞VEGFmRNA表达及VEGF蛋白分泌的影响。结果　NB4和HL 6 0细胞中均有VEGFmRNA的表达和VEGF蛋白的分泌。ATRA(10 - 5～ 10 - 8mol L)及DNR(0 .0 1～2 .0 0 μmol L)在体外能分别下调NB4及HL 6 0细胞VEGFmRNA的表达和VEGF蛋白的分泌 ,并呈时间(3～ 72h)和剂量依赖性 (r值均为 - 1.0 0 ,P值均 <0 .0 1)。结论　这两种化疗药物除了可以诱导白血病细胞分化或抑制白血病细胞生长外 ,还可以通过抑制促血管新生 ,使新生血管减少 ,以发挥抗白血病的效应。

Effect of ATRA and DNR on the expression and secretion of VEGF in leukemic cells

Objective To investigate the expression of VEGF mRNA and secretion of VEGF protein in NB4 and HL-60 cells affected by all-trans retinoic acid(ATRA) and daunorubincin(DNR) respectively. Methods Semi-quantitative RT-PCR and ELISA were used to study the expression of VEGF mRNA and secretion of VEGF protein in NB4 and HL-60 cell lines treated by ATRA and DNR respectively. Results VEGF was expressed in both NB4 and HL-60 cells. The expression of VEGF mRNA and secretion of VEGF protein could be down-regulated by ATRA and DNR respectively in a time and dose dependent manner. Conclusion Besides inducing apoptosis and restraining proliferation of leukemic cells,ATRA and DNR exerted their anti-leukemia effects by reducing angiogenesis via reduction of angiogenic reaction stimulating signals.