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三丁基锡对小鼠脾、肝和脑组织蛋白磷酸酶2A活性的影响

张亚莉,孙玉涛,翁登坡,徐立红*   

  1. ( 浙江大学医学院生物化学与遗传学系,浙江 杭州 310058 )
  • 收稿日期:2012-03-05 修回日期:2012-05-23 出版日期:2013-05-30 发布日期:2013-05-30
  • 通讯作者: 徐立红,Tel: 0571-88208265,E-mail: xulihong@ zju.edu.cn
  • 作者简介: 张亚莉(1978- ),女,甘肃省渭源县人,博士,研究方向:生化毒理学。E-mail: zyl031912@163.com
  • 基金资助:

    国家自然科学基金项目(20777067)

The effects of tributyltin on PP2A activity in mouse spleens, livers and brains

ZHANG Ya-li,SUN Yu-tao,WENG Deng-po,XU Li-hong*   

  1. (Department of Biochemistry and Genetics, School of Medicine, Zhejiang University, Hangzhou 310058, Zhejiang, China)
  • Received:2012-03-05 Revised:2012-05-23 Online:2013-05-30 Published:2013-05-30
  • Contact: XU Li-hong,Tel: 0571-88208265,E-mail: xulihong@ zju.edu.cn

摘要:

目的: 研究三丁基锡 (tributyltin,TBT)对小鼠脾、肝和脑组织蛋白磷酸酶2A (protein phosphatase 2A,PP2A)活性的影响。方法:将不同浓度TBT (0、10、20、60 mg/kg),分别以灌胃的方式对小鼠染毒24和96 h,检测脾、肝和脑组织PP2A酶活性的改变。结果:TBT染毒24和96 h,小鼠脾脏PP2A酶活性在20和60 mg/kg剂量组明显下降,与对照组相比差异均具有统计学意义 (P < 0.01);肝脏PP2A酶活性仅在60 mg/kg时,较对照组明显被抑制 (P < 0.05);而脑PP2A酶活性在各浓度组与对照组相比均未发生明显改变 (P>0.05)。结论:PP2A酶活性的降低可能是TBT产生免疫和肝毒性效应的重要分子机制。

关键词: 三丁基锡, 蛋白磷酸酶2A, 脾, 肝,

Abstract:

OBJECTIVE: To investigate the effects of tributyltin(TBT) on the activity of protein phosphatase 2A(PP2A) in the mouse spleens,livers and brains. METHODS:Mice were orally dosed with 0,10,20 and 60 mg/kg of body weight TBT for 24 h and 96 h,and the activity of PP2A was assessed in the mouse spleens,livers,and brains. RESULTS:PP2A activity in the spleens was obviously inhibited in 20 and 60 mg/kg groups treated for 24 h and 96 h compared to the control group (P< 0.01). PP2A activity in the livers was significantly inhibited in the highest dose of TBT (60 mg/kg) for 96 h compared to the control group (P < 0.05). With regard to the PP2A activity in the brains,there were no statistical significance differences between the control and treatment groups (P>0.05). CONCLUSION:This study suggests a critical role of PP2A in the TBT immunologic and hepatic toxicity mechanisms.

Key words: tributyltin, PP2A, spleens, livers, brains