胰岛素样生长因子1受体α链单克隆抗体对SPCA-1和A549细胞增殖的影响

The inhibitory effects at the α-strain of insulin-like growth factor 1 receptor on SPCA-1 and A549 lung adenocarcinoma cell lines

背景与目的肺癌是常见的恶性肿瘤之一,其发病率和死亡率呈逐年上升的趋势。传统的化疗和放疗由于缺乏特异性,取得疗效的同时也往往给患者带来较大的毒副作用。因此,寻找和选择肺癌细胞特异的分子靶点,开发和研究新的、针对该靶点的分子靶向治疗药物,成为目前肿瘤学术界和广大患者所关注的焦点。本研究拟探讨胰岛素样生长因子1受体α链(IGF1-αR)单克隆抗体对人肺腺癌细胞SPCA-1和A549细胞增殖的影响。方法应用杂交瘤技术制备IGF1-αR单克隆抗体,经ProteinG柱纯化分离单克隆抗体;MTT法、Ki67检测细胞的增殖情况。结果SPCA-1、A549肺腺癌细胞株在培养条件下于24h后开始进入对数增长期,细胞倍增速度快;IGF1-αR单克隆抗体干预后,SPCA-1、A549两组细胞均生长缓慢,与相应空白对照组比较,均具有显著性差异(P<0.05),同时Ki67表达也显著下降,但两组之间差异不显著。结论制备的IGF1-αR单克隆抗体对IGF1-αR高表达的SPCA-1、A549肺腺癌细胞亚群增殖具有明显抑制作用。

Background and objective Lung carcinoma is one of the most common malignant tumors in China.The increasing incidence of lung cancer has been alerted and multimodality treatments including surgery,radiotherapy,chemotherapy etc.have been highly aware.However,the outcome of treatment in lung cancer remains poor,because there is still no definite molecular targeting drug affecting its biological behavior significantly.To find an useful clinical tool,the aims of this study are to explore the effects of a novel monoclonal antibody targeting at the α-strain of insulin-like growth factor 1 receptor(IGF1-αR) on lung adenocarcinoma cell lines.Methods The novel monoclonal antibody targeting at IGF1-αR was exacted by hybrid cell processes and purified by Protein G column.The effects of growth were investigated on SPCA-1 and A549 cell lines by MTT curve lines and the expression of Ki67.Results The combination of IGF1 with IGF1-αR could be competitively inhibited by the novel monoclonal antibody significantly.Intervented by the novel monoclonal antibody,SPCA-1 and A549 cell lines proliferated more slowly than that of the respective control,with significant statistic value(P<0.05).Besides,the expression of Ki67 showed significant downregulation under the invention of the monoclonal antibody.Conclusion The special monoclonal antibody extracted in our laboratory shows good affinity with IGF1-αR,and can inhibit the growth of SPCA-1 and A549 cell lines.