20(S)-原人参二醇对SMMC-7721细胞体内外作用的研究

目的观察不同剂量的20(S)-原人参二醇(Protopanaxadiol,PPD)在体内外对人肝癌细胞株SMMC-7721抗肿瘤作用。方法建立人肝癌裸鼠皮下移植瘤模型,观察20(S)-原人参二醇的肿瘤抑制作用。MTT比色法检测20(S)-原人参二醇对SMMC-7721细胞的增殖抑制作用,Ho-echst33342核染色观察细胞凋亡形态学改变,采用FITC-An-nexinⅤ/PI双染流式细胞术分析凋亡情况,同时检测Caspase-3活性。结果在体内,PPD可抑制SMMC-7721细胞裸鼠异种移植瘤生长;在体外,PPD对SMMC-7721细胞的增殖具有明显的抑制及诱导其凋亡作用,呈时间和剂量依赖性,Hoechst33342核染色可见凋亡小体,同时伴有Caspase-3活性的增加。结论20(S)-原人参二醇在体内外均可抑制SMMC-7721细胞增殖,并诱导其凋亡,其机制可能通过活化Caspase-3诱导细胞凋亡而发挥抗肿瘤作用。

Effect of 20(S)-Protopanaxadiol on SMMC-7721 human liver cancer in vivo and in vitro

Aim To study the anti-tumor effect of 20(S)-Protopanaxadiol(PPD)at different concentration on human liver cell line SMMC-7721 in vivo and in vitro.Methods The subcutaneous transplantable tumor model of human liver cancer in nude mice was established and the anti-tumor effect was calculated.Cell growth rate was determined with MTT assay.The apoptosis was analyzed by FITC-AnnexinⅤ/PI and Hoechst33342 staining method,and the activity of Caspase-3 was detected.Results In vivo,PPD could obviously inhibit the growth of transplanted tumor.In vitro,PPD induced inhibition of human liver cancer SMMC-7721 cells was time-dependent and dose-dependent.The apoptotic body was observed by Hoechst33342 staining.PPD could induce cell apoptosis of SMMC-7721,and the increase of Caspase-3 activity was observed in each PPD group.Conclusion PPD could inhibit the growth of human liver cancer SMMC-7721 cells in vivo and in vitro by up-regulating the activity of Caspase-3 and inducing the cell apoptosis.