孕期二月桂酸二丁基锡暴露对子代大鼠睾丸酶活力和生精功能的影响

目的 探讨孕期接触二月桂酸二丁基锡(DBTD)对Wistar大鼠子代雄性鼠性成熟后睾丸酶活力和生精功能的影响.方法 以0、10、20和30 mg/kg剂量的DBTD溶液对妊娠第12天的Wistar孕鼠连续灌胃染毒至第20天,仔鼠出生后第70天,每组随机抽取10只雄性大鼠,称重并处死,测定睾丸脏器系数、附睾精子数,并采用分光光度法测定睾丸酶活力.结果 各剂量组孕鼠染毒期间体重增加量、产仔数、仔鼠雌雄比例及子代雄性大鼠体重与对照组比较,差异均无统计学意义(P＞0.05);30 mg/kg组睾丸重量和睾丸脏器系数高于对照组,差异有统计学意义(P＜0.01,P＜0.05);20和30 mg/kg组精子数高于对照组,差异有统计学意义(P＜0.05,P＜0.01).各剂量组琥珀酸脱氢酶(SDH)活力和一氧化氮合酶(NOS)活力与对照组比较,差异无统计学意义(P＞0.05);10和20 mg/kg组酸性磷酸酶(ACP)活力、10 mg/kg组乳酸脱氢酶(LDH)活力、30 mg/kg组一氧化氮(N0)含量均高于对照组,差异有统计学意义(P＜0.05).结论 在本实验染毒时间和剂量范围内,DBTD对子代雄性大鼠睾丸发育和精子形成有促进作用,而对睾丸酶活力无直接影响.

Effects of Gestation Exposure to Dibutyltin Dilaurate (DBTD) on Enzymes Activity in Testis and Spermatogenesis Function of Offspring Rats

Objective To explore the effects of gestation exposure to dibutyltin dilaurate (DBTD) on the activity of enzymes in the testis and the spermatogenesis function in the mature male offspring of Wistar rats. Methods The pregnant rats were treated with DBTD by gavage at the doses of 0, 10, 20 and 30 mg/kg for days, from 12th-20th days of gestation. On 70th postnatal day, 10 male offspring rats were selected randomly from each group for measurements of the viscera coefficient of testis and the sperm count in epididymis, the activity of enzymes of testis was determined by spectrophotometry. Results There were no significant differences seen in the body weight gain of pregnant rats from days 12-20 of gestation, litter size, sex ratio of fetuses and body weight of male offspring rats between the experimental groups and the control group. The testis weight and viscera coefficient of testis in 30 mg/kg group increased significantly compared with the control group(P<0.01,P<0.05).The sperm counts in 20 and 30 mg/kg groups were increased significantly compared with the control group(P<0.05,P<0.01). There was no significant difference seen in the activity of succinate dehydrogenase (SDH) and nitric oxide synthase (NOS) between the experimental groups and the control group. The activities of acid phosphatase (ACP) in 10 and 20 mg/kg groups, the activity of lactate dehydrogenase (LDH) in 10 mg/kg group and the concentration of nitric oxide (NO) in 30 mg/kg group were all significantly increased compared with the control group(P<0.05). Conclusion DBTD has a promotive effect on the development of testis and the spermatogenesis in offspring rats within the length and concentration of exposure used in the present study, but no direct effect on testis enzymes activity.