四氯化碳对雄性小鼠的遗传毒性

Genetic Toxicity Induced by Carbon Tetrachloride in Male Mice

目的检测环境污染物四氯化碳的诱变活性,评价其可能的潜在遗传毒性。方法21只雄性昆明种小鼠随机分成7组,每组3只,其中1组为对照组,其余6组采用腹腔注射的方法,分别用5、15、25mg/kg四氯化碳进行染毒24h和48h分别进行精子畸形试验和小鼠股骨骨髓嗜多染红细胞(PCE)微核试验,然后每组观察5000个精子计算精子畸变率;每组观察5000个股骨骨髓PCE细胞,计算微核率。结果染毒小鼠的精子有明显的畸变效应,小鼠股骨骨髓PCE细胞的微核率和精子畸变率明显高于对照组(P<0.01)。结论四氯化碳对小鼠生殖细胞和血红细胞有遗传毒性作用。

Objective To study the genetic toxicity of carbon tetrachloride for male mice and assess the potential genetic toxic effect on mankind. Methods Micronucleus test and sperm malformation test were used respectively to determine the change of micronucleus cell frequencies (MNCF) and the rate of sperm deformity of germ cell induced by carbon tetrachloride in male mice. Carbon tetrachloride was given through intraperitoneal injection at does of 5,15,25 mg/kg respectively for 24 h and 48 h, the rates of micronucleus in the bone marrow cell and sperm deformity of germ cell of male mice were investigated by counting the number of micronucleus cells per 5 000 polychromatic erythrocyte (PCE) in bone marrow and sperm deformity cells per 5 000 germ cells from male mice. Results The micronucleus rates of PCE in bone marrow and sperms deformity frequencies in carbon tetrachloride treated groups were much higher than the control group (P<0.01). Conclusion Carbon tetrachloride has genetic toxic effect on the PCE cell and germ cell in the mice.