全氟辛烷磺酸对雄性大鼠生精功能的影响

目的探讨全氟辛烷磺酸(Perfluorooctanesulfonate,PFOS)对雄性大鼠生精功能的影响。方法36只雄性Wistar大鼠按体重随机分为4组,分别在饲料中添加PFOS0、05、15和45mg·kg-1。65天后,观察大鼠睾丸、附睾脏器系数以及精子数量、活动度和畸形率;检测大鼠睾丸组织中乳酸脱氢酶同工酶(LDHx)、山梨醇脱氢酶(SDH)的活性和丙二醛(MDA)含量。结果PFOS染毒使大鼠体重和睾丸重量下降(P<005),但睾丸和附睾脏器系数未见显著性变化(P<005)。PFOS15和45mg·kg-1剂量组大鼠精子数,LDHx和SDH活力与对照组比较,均显著降低(P<005);精子畸形率与对照组比较,均显著升高(P<005)。PFOS45mg·kg-1剂量组大鼠MDA含量显著高于对照值(P<005),精子活动率明显低于对照值(P<005)。结论PFOS对大鼠精子形成和成熟过程有损伤作用。

Effects of perfluorooctane sulfonate on spermiogenesis function of male rats

OBJECTIVE: To evaluate the effects of administration of perfluorooctane sulfonate(PFOS) on spermiogenesis function of male rats. METHODS: 36 male rats were randomly divided into 4 groups, which received 0, 0.5, 1.5, 4.5 mg x kg(-1) PFOS by food intake per day for 65 days. The testicular and epididymal viscera coefficients, the number, motility and deformity of sperm were examined. The activities of lactate dehydrogenase isoenzyme-x (LDHx), sorbitol dehydrogenase (SDH) and the generation of maglonydiadehyde (MDA) in the testes were also measured. RESULTS: The viscera coefficients did not show any significant change ( P > 0.05) while the body weight and weight of testis decreased ( P < 0.05) in treated rats compared with the corresponding control group animals. In 1.5,4.5 mg x kg(-1) PFOS treated rats there were significant decreases in the sperm count (P < 0.05) and the mean activities of LDHx and SDH whereas obvious increases in the rate of sperm deformity ( P < 0.05). In 4.5 mg x kg(-1) PFOS group the generation of MDA increased (P < 0.05) while the motility of sperm reduced (P < 0.05) with respect to the control value. CONCLUSION: It suggested that PFOS could elicit the impairment of sperm production and maturation of male rats.