芒柄花黄素对人胃癌细胞系SGC7901生长、增殖及侵袭影响

Effects of anthoxanthin on the growth,proliferation and invasion of human gastric cancer cell line SGC7901

目的:探讨芒柄花黄素(Form)对人胃癌细胞株SGC7901的作用及机制。方法:用不同浓度(0、20、40、80μmol/L)Form处理SGC7901后,采用Hoechst、MTT、流式细胞术等检测细胞抑制率、细胞周期、细胞核形态及凋亡。采用蛋白质印迹检测β-Catenin、p-β-Catenin、Cyclin D1、CDK4及p-AKT、AKT、BCL-2、BAX、Caspase3等蛋白的表达,RT-PCR检测BCL-2、CDK4、CDK6、AKT、Cyclin D1及BAX、Caspase3等m RNA表达。结果:Form抑制SGC7901细胞的增殖,呈浓度和时间依赖性。Hoechst结果表明,相比于对照组(0μmol/L),实验组Form(20、40、80μmol/L)作用48 h后,细胞核固缩、溶解,破裂后呈颗粒状聚集。流式细胞术结果显示,不同浓度Form处理48 h,细胞凋亡率分别为17.0%、21.5%、32.5%,呈浓度依赖性。RT-PCR结果显示,SGC7901中Caspase3、BAX m RNA表达量随Form浓度增加而上升(P<0.01);BCL-2、CDK4、CDK6、AKT、Cyclin D1的m RNA表达量逐渐降低(P<0.01)。WB结果表明,SGC7901细胞中β-Catenin、p-β-Catenin、Cyclin D1、CDK4以及p-AKT、AKT、BCL-2等蛋白的相对表达量随Form浓度增加而降低(P<0.01);Caspase3、BAX等蛋白表达逐渐上升(P<0.01)。结论:Form具有促进SGC7901细胞凋亡的作用;其机制可能是通过抑制Wnt/β-catenin信号,活化Caspase家族实现的。

Objective:To investigate the effect of anthoxanthin on the proliferation and apoptosis of human gastric cancer cell line SGC7901 and its possible mechanism.Methods:SGC7901 was cultured in the medium containing different concentrations(0,20,40,80μmol/L)of anthocyanin.Hoechst staining,MTT colorimetry and flow cytometry were used to verify the effect of Form on the inhibition rate,cell cycle,nuclear morphology and apoptosis.Western Blotting was used to test the level of β-Catenin、p-β-Catenin,CyclinD1,CDK4,p-AKT,AKT,BCL-2,BAX,caspase3 and other proteins.The mRNA expression of BCL-2,CDK4,CDK6,AKT,CyclinD1,BAX,Caspase3 was detected by RT-PCR.Results:MTT results showed that the inhibitory effect of Form on SGC7901 was concentration dependent and time dependent.Hoechst staining showed that the cells in the experimental group(20,40,80μmol/L),the phenomenon of pyknosis and dissolution of the nucleus,even granular aggregation after rupture.Flow cytometry showed that the apoptosis rate of the experimental group(20μmol/L,40μmol/L,80μmol/L)was 17.0%,21.5%,32.5% respectively after treated with different concentrations of Form for 48 hours,which was positively correlated with the drug concentration.RT-PCR showed that caspase3 and BAX mRNA expression increased with the increase of Form intervention concentration(P<0.01);the mRNA expression of BCL-2,CDK4,CDK6,AKT,CyclinD1 decreased(P<0.01).WB results showed that β-Catenin、p-β-Catenin,CyclinD1,CDK4 and p-AKT,AKT,BCL-2 decreased with the increase of Form intervention concentration(P<0.01);The relative expression of caspase3,BAX and other proteins increased(P<0.01).Conclusion:Form can promote apoptosis of SGC7901,and the possible mechanism is to inhibit Wnt/β-Catenin signal;it also mediates the activation of Caspase family.