两种多巴胺D2受体异型的不同功能
A Usiello1, J H Baik, F Rougé-Pont
1Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS, INSERM, ULP, Illkirch, C.U. de Strasbourg, France.
Nature
|November 23, 2000
概括
多巴胺D2受体具有不同的作用:D2L是后突触的,被抗精神病药物准,而D2S是前突触的,抑制D1受体功能. 这揭示了神经精神疾病的新型治疗点.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 多巴胺D2受体调节关键的生理功能,包括运动,激素释放和奖励通路.
- 这些受体是用于治疗精神分裂症和其他神经精神疾病的抗精神病药物的主要点.
- D2受体基因的替代拼接产生了两个异型,D2短 (D2S) 和D2长 (D2L),以前认为它们在功能上是相同的.
研究的目的:
- 调查D2S和D2L多巴胺受体异型的独特体内功能.
- 确定D2L和D2S在突触后和突触前信号传递中的特定作用.
- 探索异形特异性功能对抗精神病药物作用和多巴胺受体电路的影响.
主要方法:
- 产生和分析D2L缺乏的小鼠模型.
- 评估野外类型和淘汰赛小鼠的运动行为,包括触觉.
- 药理学挑战与抗精神病药物,如哈洛佩里多尔.
- 研究多巴胺受体信号相互作用,特别是D2S和D1受体之间的相互作用.
主要成果:
- D2L受体主要在 postsynaptic 位点起作用,调解对抗精神病药物 (如哈洛佩里多尔) 的反应.
- D2S受体作为前突触自身受体,调节多巴胺释放.
- 缺乏D2L的小鼠表现出没有皮醇诱导的触觉,这表明D2L是关键目标.
- D2L功能的丧失揭示了D2S在D1受体中介信号传递上的抑制作用,揭示了多巴胺受体类型之间的交叉对话.
结论:
- 多巴胺D2受体异型D2L和D2S在体内具有不同的非冗余功能.
- D2L是抗精神病药物如哈洛佩里多尔的关键后突触点,为向治疗提供了潜在的潜力.
- D2S和D1受体之间的相互作用突出了多巴胺受体信号干扰的新机制,具有治疗意义.
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