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邻苯二甲酸二(2-乙基己)酯对雄性大鼠激素相关基因表达水平的影响

秦逍云1,2,谭  琴1,2,徐新云1,*,吴德生1,黄海燕1   

  1. 广东省深圳市疾病预防控制中心,深圳市现代毒理学重点实验室,广东  深圳  518055
  • 收稿日期:2014-05-19 修回日期:2014-09-02 出版日期:2014-09-30 发布日期:2014-09-30
  • 通讯作者: 徐新云,E-mail:xyxu2008@163.com
  • 作者简介:秦逍云(1989- ),女,山西人,硕士研究生,研究方向:分子生物学专业。E-mail:903285199@qq.com
  • 基金资助:

    广东省科技计划项目(2013B021800032)

The effects of di(2-ethylhexyl ) phthalate on hormonal- related gene expression levels in male rats'

QIN Xiao-yun1,2,TAN Qin1,2,XU Xin-yun1,*,WU De-sheng1,HUANG Hai-yan1   

  1. Shenzhen Center for Disease Control and Prevention, Shenzhen Key Laboratory of Modern Toxicology, Shenzhen 518055
  • Received:2014-05-19 Revised:2014-09-02 Online:2014-09-30 Published:2014-09-30

摘要:

目的: 探讨邻苯二甲酸二(2-乙基己)酯(DEHP)对雄性大鼠睾丸中激素相关基因表达水平的影响,为研究DEHP生殖毒性提供科学依据。方法:40只5周龄雄性SPF级SD大鼠,随机分为对照组(玉米油)、DEHP低剂量组(100 mg/kg)、DEHP中剂量组(500 mg/kg)和DEHP高剂量组(1 500 mg/kg),每组10只,每天灌胃染毒1次,每周5次,连续染毒6周。于末次染毒24 h后处死动物,实时荧光定量PCR法测定睾丸组织内类固醇快速调节蛋白(StAR)、3β-羟基类固醇脱氢酶(3β-HSD)、17β-羟基类固醇脱氢酶(17β-HSD)、促性腺激素释放激素(GnRH)及雌激素受体(ERα、ERβ)的基因表达水平。结果:与对照组比较,StAR、3β-HSD基因表达水平在DEHP各剂量组均明显升高,差异均具有统计学意义(P<0.01或P<0.05);17β-HSD基因表达水平在DEHP高剂量组升高(P<0.01),而低剂量组和中剂量组则无明显改变(P>0.05);ERα基因表达在DEHP高剂量组升高(P<0.01);ERβ基因表达在DEHP低剂量组和中剂量组下降(P<0.01),但在DEHP高剂量组升高(P<0.01);GnRH基因表达水平在DEHP中剂量组和高剂量组均显著下降,差异具有统计学意义(P<0.01或P<0.05)。结论:DEHP染毒可引起雄性大鼠激素相关基因表达水平改变,干扰雄性激素的合成,可能导致生殖障碍。

关键词: 邻苯二甲酸二(2-乙基己)酯, 类固醇快速调节蛋白, 3&beta, -羟基类固醇脱氢酶, 17&beta, -羟基类固醇脱氢酶, 促性腺激素释放激素, 雌激素受体, 基因表达

Abstract:

OBJECTIVE: To explore the effects of di(2-ethylhexyl) phthalate (DEHP) on hormonal-related gene expression levels in male rats. METHODS:A total of 40 healthy 5-week-old male Sprague-Dawley rats were randomly divided into four groups with 10 rats in each group. The DEHP doses were 0 mg/kg in control group(corn oil),100 mg/kg in low dose group,500 mg/kg in medium dose group and 1 500 mg/kg in high dose group. Rats were exposed to DEHP via gavage administration for six consecutive weeks,DEHP administration was once a day and five times a week. After exposure,rats were anesthetized by ether,then sacrificed for further study. The relative gene expression levels of steroidogenic acute regulatory protein (StAR),3β-hydroxysteroid dehydrogenase(3β-HSD),17β-hydroxysteroid dehydrogenase (17β-HSD),estrogen receptors (ERα/β) and gonadotropin releasing hormone (GnRH) were analyzed by real time quantitative RT-PCR. RESULTS:Compared with control group,the relative gene expression levels of StAR and 3β-HSD were increased in medium DEHP dose and high DEHP dose groups (P<0.01 or P<0.05). The relative gene expression levels of 17β-HSD,ERα and ERβ were increased in high DEHP dose group (P<0.01 or P<0.05),while the relative gene expression levels of GnRH was decreased in medium DEHP dose and high DEHP dose groups(P<0.01 or P<0.05). CONCLUSION:DEHP could cause endocrine disorder and interfere with the synthesis of male hormones in rats,ultimately leading to male reproductive dysfunction.

Key words: di(2-ethylhexyl) phthalate, steroidogenic acute regulatory protein, 3β-hydroxysteroid dehydrogenase, 17β-hydroxysteroid dehydrogenase, gonadotropin releasing hormone, estrogen receptor α, estrogen receptor β, gene expression