枞酸钠对体外培养日本血吸虫成虫的杀虫效果

Killing effect of sodium abietate on adult worms of Schistosoma japonicum in vitro

目的观察枞酸钠对体外培养的日本血吸虫雄性和雌性成虫的杀灭效果。方法小鼠感染日本血吸虫尾蚴5周后肝门静脉灌注法收集雌、雄成虫,体外培养于DMEM培养液中,加入不同浓度枞酸钠连续培养3d,观察虫体死亡及活力降低情况,并设空白对照组。虫体盐酸卡红染色,观察其损伤情况。采用Bradford标准曲线法测定药物对虫体蛋白质含量的影响。结果在含不同浓度枞酸钠的DMEM培养液中,雄虫及雌虫死亡率与活力降低率显著高于对照组;雄性成虫对枞酸钠的敏感性高于雌性成虫(P均<0.05)。染色结果显示,雄虫虫体肠管膨大,均出现黑色或褐色条带或斑点;雌虫肠管内容物分布不均,部分虫体卵巢形状不规则,着色不均匀。蛋白质含量测定结果显示雄性与雌性虫体的蛋白质含量均较对照组显著降低(P均<0.05)。结论枞酸钠具有体外杀灭日本血吸虫成虫的作用,其可能会影响日本血吸虫成虫的蛋白质代谢。

Objective To observe the killing effect of sodium abietate on adult male and female worms of Schistosoma japonicum in vitro. Methods The mice infected with cercariae of S. japonicum were sacrificed and perfused five weeks later, the adult worms obtained by the portal perfusion method, were cultivated in DMEM medium containing different concentrations of sodium abietate for 3 days, except the controls, then the worms were observed for the death and motility reducing. The worms were stained by hydrochloric acid carmine for the detection of the changes, and the protein of the worms was detected by using the ultraviolet ray-absorption and Bradford method. Result After the treatment of sodium abietate, the mortality and motility reducing rate of adult worms were higher significantly than the controls; the effect of sodium abietate on male worms was more obvious than on female worms. The male worms’ intestinal canal enlarged and appeared black or brown bands or spots after the treatment. The contents of the intestine of female worms were distributed asymmetrically, and the shape of some worms’ ovaries was anomalism and the coloring was asymmetrical. Compared with the control group, the protein of adult male and female worms were reduced （P0.05）. Conclusion Sodium abietate could kill adult worms of S. japonicum in vitro. It may affect the protein metabolism of the worms.