阿帕替尼通过抑制HMGA2增强顺铂对胃癌的抗瘤作用

目的：探讨阿帕替尼（apatinib，APA）联合顺铂（cisplatin，DDP）对胃癌（gastric carcinoma，GC）细胞增殖、侵袭和迁移 能力的影响及其分子机制。方法：收集2016年1月到2019年6月武威市人民医院手术切除的50例GC患者的癌及癌旁组织标 本，以及GC细胞系MGC803和SGC7901， 用qPCR检测组织中HMGA2和细胞中增殖、迁移及侵袭相关mRNA的表达水平。采 用脂质体转染技术， 将pcHMGA2转染MGC803和SGC7901细胞，经分别用不同浓度的DDP和APA处理，分为NC、pcHMGA2、 pcHMGA2+DDP及pcHMGA2+DDP+APA组， 用Western blotting检测GC细胞中HMGA2蛋白的表达水平，MTT、Transwell小室 法分别检测细胞的增殖、迁移和侵袭能力。结果：HMGA2 mRNA在GC组织中表达水平高于癌旁组织（P<0.05），且高表达组 GC患者的生存率显著降低（P<0.01）。DDP 显著抑制 MGC803 和 SGC7901 细胞的增殖、侵袭和迁移能力（均P<0.01）； DDP+APA组MGC803和SGC7901细胞的增殖、侵袭和迁移能力显著低于DDP组（均P<0.01）；APA显著增强DDP对GC细胞 HMGA2表达的抑制作用（均P<0.01）；APA通过下调HMGA2表达增强DDP对GC的抗肿瘤性。结论：APA能促进DDP对GC的 抗瘤作用，其分子机制可能是增强DDP对HMGA2表达的抑制作用有关。

Apatinib enhances the anti-tumor effect of cisplatin on gastric cancer by inhibiting HMGA2

Objective: To investigate the effect of apatinib (APA) combined with cisplatin (DDP) on the proliferation, invasion and migration capacity of gastric carcinoma (GC) cells and its molecular mechanism. Methods: Cancer and para-cancerous tissue samples resected from 50 GC patients, who were surgically treated in Wuwei People''s Hospital from January 2016 to June 2019, were collected for this study; in addition, GC cell lines MGC803 and SGC7901 were also collected. qPCR was used to detect the HMGA2 expression in tissues and mRNA expressions of molecules related to cell proliferation, migration and invasion in GC cell lines. MGC803 and SGC7901 cells were transfected with pcHMGA2 by liposome transfection technology. After treatment with DDP and APA at different concentrations, the cells were divided into NC, pcHMGA2, pcHMGA2+DDP and pcHMGA2+DDP+APA groups. Protein expression of HMGA2 in GC cells was detected by Western blotting, and proliferation, migration and invasion of the cells were detected by MTT and Transwell assay, respectively. Results: The mRNA expression of HMGA2 in GC tissues was higher than that in para-cancerous tissues (P<0.05), and the survival rate of GC patients in the high expression group was significantly reduced (P<0.01). DDP significantly inhibited the proliferation, invasion and migration of MGC803 and SGC7901 cells (all P<0.01); the proliferation, invasion and migration of MGC803 and SGC7901 cells in DDP+APA group significantly decreased (all P<0.01) as compared with DDP group; APA significantly enhanced the inhibitory effect of DDP on HMGA2 expression in GC cells (P<0.01); APA enhanced the anticancer activity of DDP against GC by down-regulating HMGA2 expression. Conclusion: APA promotes the anticancer activity of DDP against GC, and its molecular mechanism is the promotion of the inhibitory effect of DDP on HMGA2 expression.