镰形棘豆提取物抗肝癌的体内外活性研究

目的：探讨镰形棘豆提取物的体内外抗肝癌活性，并探讨其可能的机制。方法：采用MTT法检测镰形棘豆提取物对SMMC-7721细胞的增殖抑制，采用PI单染法和AnnexinV-FITC／PI双染法进行流式细胞仪检测，测定细胞周期和凋亡率，观察H22荷瘤小鼠的体内肿瘤抑制作用。结果：MTT实验表明，镰形棘豆提取物EOOF和FOF有效抑制肿瘤细胞SMMC-7721的增殖，并呈一定的剂量依赖性，其IC50值分别为0．115和0．097mg·mL^-1。TFOF作用SMMC-7721细胞后可使细胞周期停滞于G1期，凋亡细胞的比例升高，并且呈浓度依赖性。镰形棘豆提取物FOF能明显抑制H22荷瘤小鼠肿瘤的生长，低、高剂量组的抑制率分别为56．1％和70．8％（P〈0．01）。结论：镰形棘豆提取物FOF能抑制SMMC-7721细胞的增殖，诱导其凋亡，并对H22荷瘤小鼠有肿瘤生长抑制作用。显示镰形棘豆具有较好的发展为抗肝癌药物的前景。

Antitumor effects of two extracts from Oxytropis falcata on hepatocellular carcinoma in vitro and in vivo

AIMS： To investigate the antitumor effects of extracts from Oxytropis falcata on human hepatocellular carcinoma SMMC-7721 cells in vitro and in transplanted murine H22 tumors in vivo. METHODS： Cell proliferation, cell cycle distribution and apoptosis in SMMC-7721 cells were determined and tumor growth inhibition in H22 tumors was investigated. Cell cycle distribution was analyzed by flow cytometry with propidium iodide （PI） and Annexin V-FITC/ PI double staining. RESULTS： MTT assay revealed that essential oil and flavonoids of O. falcata （named EOOF and FOF） inhibited proliferation of SMMC-7721 cells in a dose-dependent manner. The IC50 value of EOOF and FOF were 0.115 and 0.097 mg.mL-1, respectively. Cell cycle was arrested at G1 phase, and induction of apoptosis occurred in SMMC-7721 cells when subjected to FOF. Growth inhibition in H22 solid tumors transplanted mice was significantly pronounced after being treated with FOF, and the inhibition ratio were 56.1% and 70.8% at the concentration of 30 and 60 mg.kg-1. CONCLUSION： The results suggest that FOF promotes apoptosis in SMMC-7721 cells and inhibits H22 tumor growth, resulting in a potential antitumor effect on hepatic cancer.