[目的]研究连翘叶水提取物对小鼠急性毒性、致突变性作用,[方法]采用最大给药量试验进行连翘叶水提取物急性毒性试验,给药后连续观察7 d、记录动物反应情况.观察结束后对小鼠进行剖检、血液学检查和生化检查,以小鼠骨髓嗜多染红细胞微核试验进行致畸变检测.[结果]小鼠最大给药量折合生药为60 000 mg/kg;在此剂量下小鼠无明显异常表现,内脏病理解剖无器官病变情况,体重、血液、生化指标与正常对照组无明显差异;微核试验呈阴性反应.[结论]连翘叶水提取物为无毒性物质,亦无致突变作用,经口给药可安全用于兽医临床.%[ Objective ] The study aimed to investigate the acute toxicity and mutagenicity of Forsythia suspensa leavies in mice. [ Method ] To study the the acute toxicity of Forsythia suspensa leavies, the largest amount was administrated to the mice by stomach feeding. Within 7 d observation, the mice were continuously observed. And at the end of the experiment, mice were sacrificed for autopsy. The hematological indexes and bio-chemical indexes of blood were detected. The micronuclear tests in polychromatophil cells were performed. [ Result] There was no significant difference on the acute toxicity test, behavioral characteristics, weight, pathological anatomy of visceral organs, hematological indexes and biochemical indexes between the experimental groups and the control group. The maximum amount of observation was 60 000 mg/kg. Micronucleus test was the negative reaction. [ Conclusion] The Forsythia suspensa leavies belonged to the non-toxic substance and had no mutagenicity in mice according to the test. The Forsythia suspensa leavies were safe in veterinary clinical application.
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