(-)-Hinokinin, a dibenzylbutyrolactone lignan, exhibits significant trypanocidal activity both in vitro and in vivo, and was obtained by partial synthesis from (-)-cubebin isolated from the dry seeds of Piper cubeba. Considering the good trypanocidal activity of (-)-hinokinin, as well as its potential for the development of new drugs, it is extremely important to evaluate its possible mutagenic activity to allow its safe use in humans. In the present study, we evaluated the antimutagenic effect of (-)-hinokinin on the chromosome damage induced by the chemotherapeutic agent doxorubicin (DXR). The test system employed was the analysis of micronucleated polychromatic erythrocytes in peripheral blood of Wistar rats. Additionally, the antioxidant activity of (-)-hinokinin was evaluated in in vitro experiments by measuring the production of hydrogen peroxide and other peroxides. Our results showed that animals treated with different doses of (-)-hinokinin (10, 20, and 40 mg/kg b.w.) exhibited micronucleated cell frequencies similar to that of the negative control. In addition, treatment with combinations of (-)-hinokinin and DXR resulted in lower micronucleated cell frequencies than those observed for animals treated with DXR alone. The present study shows that (-)-hinokinin not only has no genotoxic effect, but is also effective in reducing the chromosome damage induced by DXR. (-)-Hinokinin exerted a significant antioxidant effect on parasite mitochondria, in the protocol used, which might be one possible mechanism by which this compound may exert a protective effect on the chromosome damage induced by the free radicals generated by DXR. (c) 2006 Elsevier Ltd. All rights reserved.
(-)-Hinokinin是一种二苯基丁酰
内酯类木脂素,其在体内外均表现出显著的锥虫杀灭活性,且可通过部分合成从Cubeba干种子中分离出的(-)-cubebin获得。考虑到(-)-hinokinin具有良好的锥虫杀灭活性及其在新药开发中的潜力,评估其潜在致突变活性以确保其在人体中的安全使用至关重要。在本研究中,我们评估了(-)-hinokinin对化疗药物
阿霉素(DXR)诱导的染色体损伤的抗诱变作用。所采用的测试系统是通过对Wistar大鼠外周血中微核多色红细胞的分析。此外,我们还通过测量
过氧化氢和其他过氧化物的产生,在体外实验中评估了(-)-hinokinin的抗氧化活性。研究结果表明,接受不同剂量(-)-hinokinin(10、20和40 mg/kg体重)治疗的动物,其微核细胞频率与阴性对照组相似。此外,与DXR联合使用的(-)-hinokinin降低了微核细胞频率,而单独使用DXR的动物的微核细胞频率较高。本研究表明,(-)-hinokinin不仅没有
基因毒性,还能有效减少DXR诱导的染色体损伤。在所使用的实验方案中,(-)-hinokinin对寄生虫线粒体表现出显著的抗氧化作用,这可能是该化合物通过保护染色体免受DXR产生的自由基损伤发挥作用的一种可能机制。© 2006 Elsevier Ltd. 保留所有权利。