摘要
应用不同剂量的氯化镉(0.2、0.4和0.8mg/kgBW)对成年雄性SD大鼠进行腹腔染毒,连续染毒7天后将动物处死,分离睾丸,测定其中金属硫蛋白(MT)含量、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)等抗氧化酶活性和脂质过氧化产物丙二醛(MDA)含量。结果显示,低剂量组MT含量虽有所升高,但与对照组比较差异无显著性,中剂量组MT含量显著升高,高剂量组MT含量反而显著降低。睾丸SOD、GSH-Px等抗氧化酶的活性和MDA含量在低、中剂量组变化不明显,而在高剂量组,SOD和GSH-Px的活性显著降低,MDA含量显著升高。结果揭示,MT对镉所致的睾丸氧化损伤起重要的保护作用,镉的雄性生殖毒性可能与MT及其他抗氧化物质的抗氧化失衡有关。
In order to study the protection effect of metallothionein (MT) on peroxidative injury in testis induced by cadmium and to detect the mechanism of reproduction toxicity of cadmium, the SD rats were injected intraperitoneally with different doses of cadmium (0 2,0 4 and 0 8mg/kgBW) for 7 days. The content of MT, the activities of antioxidases and the content of malondialdehyde(MDA) in testis were detected. The results showed that the increase of MT content in the low dose group was not obvious. MT content increased significantly in the 0 4mg/kgBW group, while decreased in the 0 8mg/kgBW group. There was a significant reduction of the activities of superoxide dismutase(SOD) and glutathione peroxidase (GSH Px) in the high dose group. The content of MDA did not change obviously in the low and middle dose groups, but increased significantly in the high dose group. It was concluded that MT might play an important role in protecting testis from oxidative damage. The toxicity of cadmium on male reproduction might be related to the unbalance of anti oxidation system including MT.
出处
《卫生研究》
CAS
CSCD
北大核心
2000年第2期78-79,共2页
Journal of Hygiene Research
基金
国家自然科学基金! ( No.3 96 4 0 0 0 6 )
