摘要
目的:初步探讨金边瑞香活性成分瑞香素的体外抗肿瘤活性,并对其进行安全性评价,为金边瑞香活性成分的药用开发提供重要依据。
方法: 1.采用MTT法进行瑞香素体外抑瘤试验,检测不同浓度瑞香素对人肝癌SMMC-7721细胞和小鼠S180细胞增殖的影响。2.通过急性毒性试验、鼠伤寒沙门氏菌/哺乳动物微粒体酶试验(Ames试验)、骨髓细胞微核试验对瑞香素进行安全性评价。
结果:1.瑞香素浓度(μg/ml)为:1.95、3.90、7.81、15.62、31.25、62.5、125、250时,作用于人肝癌SMMC-7721细胞,瑞香素抑制率(%)分别为:51.48±1.65、60.32±2.49、68.97±2.51、74.23±2.56、78.51±0.61、79.35±1.22、83.6±1.47、87.1±2.35;作用于小鼠S180细胞时,瑞香素抑制率(%)分别为7.52±3.70、14.96±4.90、38.17±12.22、40.64±12.52、52.01±2.67、69.10±4.31、76.28±10.62、86.54±4.24。瑞香素对SMMC-7721和S180细胞增殖抑制作用明显,并呈现良好的剂量依赖性。2.以超过人体有效剂量175倍剂量100mg/kg.BW,一次性灌胃小鼠,连续观察7天未见中毒体征,体重增长正常。3.瑞香素Ames试验各剂量组回变菌落数均未超过阴性对照组菌落数2倍,亦无剂量反应关系。瑞香素Ames试验为阴性。4.瑞香素骨髓微核实验各剂量组微核率与阴性对照组比较无显著性差异(P>0.05),而环磷酰胺阳性对照组与阴性对照组及各样品剂量比较统计学有显著性差异(P<0.05)。表明瑞香素对小鼠骨髓细胞无抑制作用和遗传毒性,实验结果为阴性。
结论:1.瑞香素浓度(μg/ml)为:1.95、3.90、7.81、15.62、31.25、62.5、125、250范围内对SMMC-7721和S180细胞生长均有不同程度的抑制作用,并且呈现良好的剂量依赖性。
2.瑞香素在本试验剂量范围内未见明显的毒副作用,无致突变作用,安全性较高。
Objective: To evaluate the toxicity of daphnetin, to study its antitumor activity furtherly, and to provide the theory foundation for the development of daphnetin as medicine.
Method: 1. Developing the MTT assay in the vitro of daphnetin, and studying the effect of daphnetin with different concentration to the SMMC-7721 and S180 cells when were proliferating. 2.Evaluating the toxicity of daphnetin by acute toxicity tests, Ames tests, and micronucleus test.
Results: 1. When the daphnetin worked on SMMC-772 cells with the concentration of (μg/ml) 1.95、3.90、7.81、15.62、31.25、62.5、125、250, the daphnetin inhibitory rates were51.48±1.65、60.32±2.49、68.97±2.51、74.23±2.56、78.51±0.61、79.35±1.22、83.6±1.47、87.1±2.35; when the daphnetin worked on S180 cells, the daphnetin inhibitory rates were7.52±3.70、14.96±4.90、38.17±12.22、40.64±12.52、52.01±2.67、69.10±4.31、76.28±10.62、86.54±4.24 respectively.
2. Mice were treated with the daphnetin with 100/kg.bw over 175 times to human’dose which were lasting 7 days without detecting any toxic signs and change of weights.
3. The reverse mutation of daphnetin with different concentration were less than twice times to the control group without dose-dependent action and the Ames array were negative.
4. There was no significance between the daphnetin groups and the control groups(p>0.05), thus significance observed between the CY group and negative group(p<0.05), which indicated that daphnetin had no inhibitory and inherent toxicity activity on morrow cells.
Conclusion: 1. The daphnetin had inhibitory activity to SMMC-7721和S180 cells in some range with dose-dependent effect. 2. The daphnetin had no significantly toxicity activity without mutagenesis.
引文
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