【摘要】 目的探讨血管生长抑素基因联合生长抑素在体外对人胰腺癌细胞BXPC-3和血管内皮细胞ECV-304增殖的抑制作用。方法重组pcDNA3/angio质粒转染人胰腺癌细胞BXPC-3,利用RT-PCR和Western blot检测其表达及分泌血管生长抑素的情况;MTT法和流式细胞仪检测生长抑素和血管生长抑素对BXPC-3和ECV-304细胞增殖的影响。结果转染后的BXPC-3细胞表达并分泌血管生长抑素。一定浓度(≥10μg/ml)的生长抑素对BXPC-3细胞的增殖有明显抑制作用(P<0.01),并在一定浓度范围内呈剂量依赖性,同时能诱导BXPC-3细胞凋亡(P<0.01);但其对ECV-304细胞的增殖无明显影响(P>0.05)。血管生长抑素对ECV-304细胞的增殖有明显抑制作用(P<0.01),并能诱导其凋亡(P<0.01);但对BXPC-3细胞的增殖无明显影响(P>0.05)。血管生长抑素联合生长抑素对BXPC-3及ECV-304细胞的增殖均有明显抑制作用(P<0.01),也可诱导其凋亡(P<0.01),但无协同增强效应。结论①生长抑素主要通过直接抑制胰腺癌细胞增殖、促进其凋亡而发挥抗胰腺癌作用;在体外其对血管内皮细胞无抑制作用。②血管生长抑素主要通过特异性地抑制胰腺癌血管内皮细胞的增殖并诱导其凋亡,从而抑制新生毛细血管的生成,致胰腺癌细胞坏死和肿瘤消退。更多还原

【Abstract】 Objective To investigate the effect of angiostatin gene combined with somastatin on inhibiting proliferation of human pancreatic cancer cell BXPC-3 and endothelial cell of vascular ECV-304 and on inducing their apoptosis in vitro. Methods The pcDNA3/angio was transfected BXPC-3 by liposome-mediated gene transfer method. RT-PCR and Western blot were used to detect the expression of angiostatin gene. In vitro, MTT and flow cytometry (FCM) were used to detect whether angiostatin gene combined with somastatin could effect the growth inhibition of BXPC-3 and ECV-304 cells. Results Angiostatin was expressed and secreted by transfected BXPC-3. The growth of BXPC-3 was inhibited by certain concentration of somatostatin (≥10 μg/ml, P<0.01), which was dependent on the dose of somatostatin in a concentration extent; Simultaneity apoptosis was induced (P<0.01). But the growth of ECV-304 was not inhibited with somatostation (P>0.05). Angiostatin could inhibit the growth of ECV-304 and induced apoptosis (P<0.01), but it had no effect on the growth of BXPC-3 (P>0.05). Angiostation gene combined with somatostation could inhibit the growth both of BXPC-3 and ECV-304 (P<0.01), and induce apoptosis of them (P<0.01); but the effect couldn’t be additived. Conclusions ①Somatostatin directly inhibits the proliferation of human pancreatic cancer cells and induces apoptosis, but it doesn’t directly inhibit angiogenesiso of human pancreatic cancer. ②Angiostatin specially inhibits the proliferation of endothelial cell of vascular and induces apoptosis. Angiostatin could inhibit angiogenesis of human pancreatic cancer to induce necrosis of cancer cell.更多还原