摘要
目的探讨雪灵芝水溶性提取物(arenaria kansuensis aqueous extract,AKAE)对人胃癌细胞株MGC-803细胞增殖及细胞周期的影响。方法体外培养的MGC-803细胞经不同浓度AKAE处理,采用MTT法检测受试细胞增殖水平;应用流式细胞术检测AKAE处理12h后各组细胞的细胞周期;Western blot检测不同浓度、不同时间AKAE处理组MGC-803细胞中cyclin D1蛋白表达水平;实时定量PCR检测各组MGC-803细胞中cyclin D1、p16和p21基因的mRNA相对表达量。结果AKAE对体外培养的MGC-803细胞增殖具有浓度依赖性抑制作用(P〈0.05),IC50为(0.134±0.005)mg/ml;经AKAE处理12h,0.8mg/ml组MGC-803细胞的G1期细胞比例高于对照组、S期细胞比例低于对照组(P〈0.05);(0.2~0.8)mg/ml浓度的AKAE处理,对MGC-803细胞中cyclin D1的蛋白及mRNA表达具有明显抑制作用(P〈0.05);AKAE促进MGC-803细胞中p16、p21基因mRNA表达,0.2mg/ml处理组p16、p21mRNA相对表达量分别为对照组的3.3倍和18.5倍。结论雪灵芝水提物(AKAE)对MGC-803细胞增殖具有抑制作用,其机制与G1期阻滞和对G1期相关因子表达的影响有关。
Objective To investigate the effects of arenaria kansuensis aqueous extract (AKAE) on proliferation and cell cycle of human gastric cancer cell line MGC-803. Methods MGC-803 cells were treated with AKAE at different concentration. The effect on proliferation of MGC-803 cells was detected by MTT assay. The flow cytometry was used to test the cell cycle of MCK2-B03 cells. The protein and mRNA expressions of cyclin D1, p16 and p21 in MGC-803 cells were detected by western blot and real-time PCR respectively. Results The proliferation of MGC-803 cells was dose-dependently inhibited by AKAE treatment in vitro (P〈0. 05), and the value of IC50 was (0. 134 + 0. 005)mg/ml. After treated with AKAE at the dose of 0. 8 mg/ml for 12 h, the ratio of G1 phase in MCA2-803 cell cycle was increased, and the ratio of S phase in MGC-803 cell cycle was decreased(P〈0. 05). The protein and mRNA expressions of cyclin D1 in MGC-803 cells were obviously blocked by AKAE at the dose of (0. 2-0. 8) mg/ml(P% 0. 05). AKAE treatment could enhance the rnRNA expressions of p16 and p21 in MGC-803 cells. Compared with control group, the relative expression values of p16 and p21 mRNA in 0. 2 mg/ml group were 2. 30 and 17. 5 times higher, respectively. Conclusion AKAE could inhibit the proliferation of MGC-803 cells, and the mechanism is closely associated with G1-phase cell cycle arrest and expression of Gt-phase related factors.
出处
《肿瘤防治研究》
CAS
CSCD
北大核心
2013年第9期821-825,共5页
Cancer Research on Prevention and Treatment
基金
国家自然科学基金地区基金资助项目(81060369)
青海省应用基础研究项目资助课题(2010-Z-722)