【摘要】 目的:观察复方菝葜颗粒(compound rhizoma smilacinus granule,CRSG)对非小细胞肺癌A549细胞Bcl-2和Bax mRNA表达水平的影响,探讨CRSG抑制非小细胞肺癌的作用机制。方法:雄性SD大鼠30只,随机分为两组,每组15只。一组灌服复方菝葜颗粒,2次/d;另一组灌服等剂量的蒸馏水,第6次灌胃后的2h提取血清。A549细胞株随机分为中药实验组、西药对照组、正常对照组,分别加入10%的含药血清、顺铂3μg/mL和10%SD大鼠血清,培养48h后收集细胞,RT-PCR测定Bcl-2和Bax mRNA的表达水平。结果:各组细胞培养48h后中药实验组、西药对照组细胞Bcl-2 mRNA表达下调,Bax mRNA表达上调,Bcl-2/Bax比值则显著降低,与正常对照组比较差异均有统计学意义(P<0.01)。结论:非小细胞肺癌A549细胞存在Bcl-2 mRNA高表达、Bax mRNA低表达,复方菝葜颗粒干预后可使Bax mRNA表达量显著增加,Bcl-2 mRNA表达及Bcl-2/Bax比例显著降低,这可能是其对非小细胞肺癌发挥抑瘤作用的分子机制之一。更多还原

【Abstract】 ObjectiveTo determine the effect of compound Rhizoma Smilacinus granules (CRSG) on the expression of Bcl-2 and Bax gene in A549 cell lines, and to explore the mechanism of CRSG on non-small cell lung cancers. MethodsThe SD rats were randomly divided into 2 groups: one was administrated with CRSG (n=15), and the other with the same dose of distilled water (n=15). The herbage-containing serum was obtained 2 hours after the 6th treatment. Non-small lung cancer A549 cell lines were randomly divided into CRSG group, diamminedichloroplatinum (DDP) group and normal control group, which were cultivated with 10% herbage-containing serum, DDP (3g/mL), and 10% SD rats serum respectively. The cultivated cells were collected after 48 hours, and then RT-PCR technique was used to determine the expression of Bcl-2 and Bax mRNA.ResultsCompared with the normal control group after 48h, the level of Bcl-2 mRNA and the rate of Bcl-2/Bax decreased in the CRSG group and the DDP group, and the level of Bax mRNA increased with significant difference (P<0.01). ConclusionNon-small cell lung cancer A549 cell lines have a high level of Bcl-2 mRNA and a low level of Bax mRNA. CRSG can significantly down-regulate the expression of Bcl-2 mRNA and the rate of Bcl-2/Bax, and obviously up-regulate the expression of Bax mRNA, which probably is one of the molecular mechanisms of CRSG in inhibiting the growth of non-small cell lung cancers.更多还原