凹顶藻萜类化合物抑瘤活性及其对免疫作用的研究

Antitumor activities and its immunologic functions of Laurencia terpenoids

目的通过对接种S180肉瘤细胞株小鼠灌胃给予不同剂量凹顶藻萜类化合物,观察其抑瘤和免疫调 节作用。方法1、以反相高效液相色谱法测定凹顶藻萜类化合物中总萜的含量,并采用Horn法检测其毒性 (LD50)。2、用S180荷瘤鼠体内实验模型进行萜类化合物的抗肿瘤评价,分别测定抑瘤率、胸腺指数、脾指数、 脾淋巴细胞增殖活性(MTT)、免疫球蛋白IgA、IgG、IgM等指标;应用软件SPSS11.5进行数据处理。结果 总萜含量的测定结果显示萜类化合物中总萜含量为63.29%。凹顶藻萜类化合物LD50>3160mg·kg-1,属 于低毒。萜类化合物组表现出较高的抑瘤率,升高胸腺指数和脾指数,促进脾淋巴细胞增殖,并提高血IgA、 IgG、IgM含量。结论凹顶藻含丰富的天然萜类化合物,且使用安全。凹顶藻萜类化合物可有效抑制S180肉 瘤的生长,促进荷瘤鼠胸腺和脾脏的生长发育,可通过全面提高动物的细胞免疫和体液免疫功能来达到控制 和杀灭肿瘤细胞的目的。

Objective To investigate the antitumor and immunologic activities of Laurencia extract(LET) in Sarcoma 180(S 180).Methods The content of total terpenoids in LET was detected by RP-HPLC and its toxicity(LD 50) was estimated by Horn assay. Tumor inhibition rates, index of thymus and spleen, proliferation of spleen lymph cells, IgA,IgG,IgM were detected. The data were analyzed by SPSS software. Results The content of total terpenoids in LET was proved to be 63.29%. LET showed low toxicity with its LD 50 more than 3160mg·kg -1. Tumor inhibition rates of test groups were significantly higher than those of the control group. LET could obviously increase the levels of index of thymus and spleen. LET increase the multiplication of spleen lymph cell.Concentrations of IgA、IgG and IgM in plasma of the test groups were higher than those of the control group. Conclusion LET rich in terpenoids is safety to be taken orally. The alga extract showed obvious antitumor activities and immunologic functions.