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Apoptosis induced by the C21 sterols in Baishouwu and its mechanism of action in hepatoma
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- Author:
- No author available
- Journal Title:
- ACTA PHARMACEUTICA SINICA
- Issue:
- 4
- DOI:
- 10.3321/j.issn:0513-4870.2007.04.004
- Key Word:
- 甾体苷;肝癌;细胞凋亡;bcl-2基因
Abstract： 研究白首乌C21甾体苷对肝癌实体瘤细胞的凋亡作用及其机制.建立肝癌实体型(Heps)小鼠移植性肿瘤模型,随机分为模型组和C21甾体苷各用药组,连续灌胃,10 d后脱颈椎处死小鼠,进行抑瘤率计算,对肿瘤组织进行电镜下观察,采用免疫荧光(AO/EB)测定肿瘤细胞凋亡,免疫组化染色检测bcl-2基因的表达.C21甾体苷(10,20和40 mg·kg-1)对小鼠移植性肝癌Heps有抑制作用,3个剂量组的抑瘤率分别为34.79%,47.08%和50.23%.C21甾体苷(10,20和40 mg·kg-1)可增加肿瘤细胞的凋亡,电镜下可见凋亡的形态学改变,并出现凋亡小体;免疫组化结果显示,bcl-2基因的表达与模型组比较明显降低(P＜0.01),但不同于凋亡结果的是高剂量组的阳性面积表达比中剂量略高.降低高表达的bcl-2基因从而促进肝癌细胞的凋亡,可能是C21甾体苷抗肝癌的机制之一.
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