中国圆田螺多糖体外抗乙肝病毒的实验研究

目的:探讨中国圆田螺多糖(PCC)体外抗乙肝病毒的生物学活性.方法:以HepG2 2.2.15细胞系为体外实验模型.MTT法检测细胞毒性,将不同安全浓度的PCC及阳性对照药物3TC作用于此细胞系,实验同时设不加药物的细胞对照,第9天收集细胞培养上清液.采用ELISA法测定各组细胞培养上清液中HBsAg,HBeAg水平,荧光探针定量PCR检测HBV-DNA含量.结果:PCC在HepG2 2.2.15细胞培养中的TCo为1g·L-1,TC50 ＞10 g·L-1,对细胞毒性较小.PCC对HepG2 2.2.15细胞HBsAg,HBeAg分泌的IC50分别为0.501,0.401 g·L-1,SI分别为＞19.96和＞24.94.PCC可以有效抑制HBsAg,HBeAg的分泌,且PCC对HBeAg的抑制效果优于HBsAg.PCC在0.1,1g·L-1(P＜0.05)对HepG2 2.2.15细胞中的HBV-DNA有明显的抑制作用.结论:中国圆田螺多糖具有一定的体外抗HBV活性,且毒性较小,具有良好的应用前景.

Experimental study on polysaccharide of Cipangopaludina chinensis against HBV in vitro

Objective: To evaluate the biological activity of polysaccharide of Cipangopaludina chinensis (PCC) against HBV in vitro. Method: HepG2 2.2.15 cells were taken as the in vitro experimental model. The cell toxicity was observed by MTT. PCC of different safe concentrations and positive control medicine 3TC were added into the cells. Cell control without medicine was set at the same time. Cultural supernatants were collected at 9 d. HBsAg and HBeAg in cultural supernatants were tested by ELISA. The content of HBV-DNA was detected by TaqMan probe fluorescence quantitative PCR. Result: TC₀ and TC₅₀ of PCC in HepG2 2.2.15 cell culture were 1 g·L^-1 and >10 g·L^-1, respectively, suggesting low toxicity in cells. IC₅₀ of PCC in HepG2 2.2.15 cells HBsAg and HBeAg were 0.501, 0.401 g·L^-1, with SI being >19.96 and >24.94, respectively. PCC could effectively inhibit the secretion of HBsAg and HBeAg, and have a better effect on HBeAg than on HBsAg. PCC had a significant inhibitory effect on HBV-DNA in HepG2 2.2.15 cells at concentrations of 0.1, 1 g·L^-1 (P<0.05). Conclusion: PCC has the effect against HBV activity in vitro to some extent, with low toxicity, thereby having a good prospect for application.