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中国临床药理学与治疗学 ›› 2006, Vol. 11 ›› Issue (7): 725-738.

• 研究原著 • 上一篇    下一篇

硫酸锌诱导金属硫蛋白对阿霉素致心脏氧自由基产生的影响

郭家彬, 陈立娟, 闫长会, 阳海鹰, 王国强, 彭双清   

  1. 军事医学科学院毒物药物研究所, 国家北京药物安全评价研究中心,北京 100850
  • 收稿日期:2006-04-24 修回日期:2006-06-28 出版日期:2006-07-26 发布日期:2020-10-30
  • 作者简介:郭家彬, 男, 硕士生, 研究方向:药物安全性评价。Tel:13121715849 E-mail:gjb321@163.com
  • 基金资助:
    国家自然科学基金资助项目(No30572281)

Effect of metallothionein on Doxorubicin-induced superoxide production in mice heart

GUO Jia-bin, CHEN Li-juan, YAN Chang-hui, YANG Hai-ying, WANG Guo-qiang, PENG Shuang-qing1   

  1. 1National Beijing Center for Drug Safety Evaluation and Research , Beijing Institute of Pharmacology and Toxicology , Beijing 100850 , China
  • Received:2006-04-24 Revised:2006-06-28 Online:2006-07-26 Published:2020-10-30

摘要: 目的 研究硫酸锌诱导金属硫蛋白(MT)对阿霉素(DOX)致氧自由基产生的影响。方法 雄性野生型小鼠(MT+/+)及敲除MT 基因的转基因小鼠(MT-/-)随机分成4 组, 即对照组、DOX 组、锌预处理组、锌预处理+DOX 组。动物单次腹腔注射DOX (15 mg·kg-1 )或生理盐水(NS), 此前24 h 及48 h 分别给予锌(ZnSO4 , 20 mg·kg-1 , s.c.)或NS预处理。给药4 d 后测定心脏组织超氧阴离子(O2·-)水平及还原型谷胱甘肽(GSH)含量, Westernblot 检测内皮型一氧化氮合酶(eNOS)的表达情况。结果 DOX 能显著增加MT+/+小鼠及MT-/-小鼠心脏组织中O2·-的生成, 耗竭GSH, 上调eNOS 的表达水平, 而且MT-/-小鼠变化更为明显。Zn 预处理能显著降低DOX 致MT+/+小鼠O2·-生成增加以及GSH 耗竭, 抑制DOX 诱导的eNOS 表达增强, 但在MT-/-小鼠中无此效应。结论 MT 可抑制DOX 致氧自由基产生增加及GSH 耗竭, 此效应可能与eNOS 表达改变有关。

关键词: 金属硫蛋白, 阿霉素, 锌氧自由基, 内皮型一氧化氮合酶

Abstract: AIM: To investigate the effect of metallothionein(MT)on Doxorubicin (DOX)-induced superoxide generation.METHODS: Male wild type (MT+/+)and metallothionein-null (MT-/-)mice were divided into 4 groups respectively and were pretreated with either saline or ZnSO4(20 mg·kg-1 , s.c.)at 24 h and 48 h before a single administration of DOX (15 mg·kg-1 , i.p.)or equal volume of saline.Mice were sacrificed on the 4th day after treatment and their hearts were collected for analysis.RESULTS: Doxorubicin treatment significantly enhanced superoxide generation and depleted glutathione in MT+/+mice heart and these effects were even more severe in MT-/-mice.These toxic changes were greatly inhibited by zinc pretreatment in MT+/+ mice heart but not in MT--mice.Furthermore , zinc pretreatment significantly inhibited DOX-induced promotion of eNOS inMT+/+mice while similar effect did not occur in MT-/-mice.CONCLUSION: Metallothionein can inhibit DOX-induced enhancement of superoxide generation and protect the antioxidant defense system in mice heart , this effect is possibly associated with changes of eNOS expression.

Key words: metallothionein, Doxorubicin, zinc, superoxide, eNOS

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