中文摘要：

目的：研究不同浓度的MGd1对体外培养胃癌细胞SGC-7901增殖及凋亡的影响。方法：采用MTT法测定不同浓度MGd1对SGC-7901生长抑制作用;流式细胞术（FCM）进行细胞凋亡分析。激光共聚焦显微镜观察MGd1抗原（MGd1-Ag）的亚细胞定位。结果：MTT结果显示不同浓度的MGd1均对SGC-7901细胞产生明显的抑制效应（P=0.02）;流式细胞术分析发现MGd1可诱导SGC-7901发生凋亡并呈浓度和时间依赖性（P〈0.01）;共聚焦显微镜结果显示MGd1-Ag主要定位于细胞膜上。结论：以上结果证实胃癌特异性单抗MGd1可抑制SGC-7901的增殖并促进凋亡发生。它可能通过与细胞膜上抗原特异性结合,影响下游信号传导,从而发挥抑制效应。

英文摘要：

Objective： To investigate the effects of MGd1 with different concentration on the cell proliferation and apoptosis of gastric cancer cell line SGC-7901.Methods： Cell proliferation was detected by MTT assay and cell apoptosis was analyzed by flow cytometry.Subcellular localization of MGb2-Ag in SGC-7901 was detected by immunofluorescence staining using Laser scanning confocal microscope.Results： MGd1 could inhibit the cell proliferation and promote apoptosis of SGC7901 in dose-and time-dependent manners.The localization of MGd1-Ag was detected under confocal microscopy,and it showed that MGd1-Ag was mainly located in the membrane.Conclusion： MGd1 inhibits cell proliferation and promotes apoptosis of SGC7901 by banding with MGd1-Ag.