基础医学与临床 ›› 2018, Vol. 38 ›› Issue (10): 1378-1382.

• 研究论文 • 上一篇    下一篇

精氨酸加压素对大鼠下丘脑视前区AMPA受体GluR1-3蛋白表达的影响

徐润,孙燕泥,杨冉,唐恬,陈春月,阳明芳,付贤宁,宁峻,陈灵燕,唐瑜   

  1. 成都医学院
  • 收稿日期:2017-06-12 修回日期:2017-12-23 出版日期:2018-10-05 发布日期:2018-09-28
  • 通讯作者: 唐瑜 E-mail:tangyu@cmc.edu.cn
  • 基金资助:
    国家自然科学基金;四川省教育厅项目;四川省卫生厅项目;成都医学院“大学生创新实验计划”项目资助

Effect of arginine vasopressin on GluR1-3 protein expression of AMPA receptors in rat preoptic area of hypothalamus

  • Received:2017-06-12 Revised:2017-12-23 Online:2018-10-05 Published:2018-09-28

摘要: 目的 研究精氨酸加压素(AVP)对大鼠下丘脑视前区(POA)α-氨基-3-羟基-5-甲基异恶唑-4-丙酸(AMPA)受体GluR1-3mRNA和蛋白质表达的影响。方法 腹腔注射AVP(10μg/kg)或AVP V1a受体抑制剂(30 μg/kg)0.5 h后,用反转录实时荧光定量PCR和Western blot检测视前区AMPA受体亚基GluR1、GluR2和GluR3 mRNA和蛋白表达。结果 与对照组相比,V1a受体抑制剂明显降低了GluR2 mRNA表达(P< 0.05);AVP能显著上调视前区AMPA受体亚基GluR1和GluR2蛋白水平(P<0.01),减少GluR3蛋白表达(P< 0.01),但V1a受体抑制剂不能阻断这一作用。结论 外源性AVP主要通过影响AMPA受体亚基蛋白表达来调制大鼠视前区AMPA受体介导的谷氨酸能突触传递。

关键词: 视前区, 精氨酸加压素, AMPA受体

Abstract: Objective To investigate the effect of arginine vasopressin (AVP) on the mRNA and protein expression of GluR1-3 in the preoptic area of the rat hypothalamus. Methods After 0.5 h for intraperitoneal injection of AVP (10μg/kg) or V1a receptor antagonist (30μg/kg), the changes of the mRNA and protein expression of POAAMPA receptor GluR1, GluR2 and GluR3 subunits were analysed by reverse transcriptase real-time fluorescence quantitative PCR (RT-qPCR) and Western blot technology. Results Compared with control group, the GluR2mRNA was significantly decreased (P<0.05) by the injection of V1a receptor antagonist. AVP could up-regulate the protein level of POA GluR1,GluR2 receptor subunits(P<0.01), but down-regulate the expression of GluR3 protein (P<0.01). Nevertheless,the effect of AVPcould not be blocked by V1a receptor antagonist. Conclusions Exogenous AVP is involved in modulation of glutamatergic synaptic transmission in the POA by regulation expression of AMPA receptor proteins.

Key words: Preoptic area, Arginine vasopressin, AMPA receptor

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