Mol Pharmacol:饶毅实验室发文:提出全新证据 五羟色胺参与睡眠

2018-05-26 佚名 生物360

睡眠对动物至关重要,缺乏睡眠不仅可以降低认知,严重缺乏睡眠更可以导致致命的后果。长期以来,人类对于睡眠机理的理解相对缺乏。有些分子的作用长期有争论。睡眠药物的有效性和副作用也不尽人意。

睡眠对动物至关重要,缺乏睡眠不仅可以降低认知,严重缺乏睡眠更可以导致致命的后果。长期以来,人类对于睡眠机理的理解相对缺乏。有些分子的作用长期有争论。睡眠药物的有效性和副作用也不尽人意。

神经递质五羟色胺(5-HT)对于睡眠是什么作用?科学家有不同意见。从 1960 年代以来,就有实验提示五羟色胺促进睡眠。但也有很长时间,有实验认为五羟色胺抑制睡眠。这些研究的缺陷之一,在于都是用药物抑制五羟色胺或者抑制五羟色胺的作用,而药物分子的特异性难以保证。

2008 年和 2010 年,国外两个实验室用遗传突变的小鼠研究五羟色胺对睡眠的作用。这些小鼠因为 Lmx1b 基因被敲除,而不能形成含五羟色胺的神经元(所谓“五羟色胺能”神经元)。研究者发现,这些小鼠睡眠确实降低,但他们发现这些小鼠同时还有一个问题:体温调节缺陷。而且这些小鼠把室温当成冷,所以不睡觉是因为需要运动来提高自己的体温以保暖。在人为提高温度到 33℃后,因不用保暖,所以不用运动,这时也就观察不到睡眠的减少。这些研究者认为五羟色胺参与体温调节,而在室温情况下可以间接表现出睡眠减少,推翻了以前认为五羟色胺参与睡眠的结论。

大约在 2010 年,饶毅实验室当时的研究生刘琰在研究过程中注意到五羟色胺与睡眠的关系。其后,研究生闫洪铭和张娴研究了五羟色胺与睡眠的关系。他们用两种遗传突变的老鼠,一种是敲除 Lmx1b 基因的小鼠,另外一种敲除 Tph2 基因的小鼠。前者缺乏五羟色胺能神经元,后者缺乏五羟色胺本身(因为 Tph 基因敲除后,脑内不能合成五羟色胺)。

闫洪铭和张娴通过观察小鼠的昼夜活动、分析其脑电图(EEG)、肌电图(EMG),发现:Lmx1b 基因敲除小鼠确实影响体温调节,但 Tph2 基因敲除小鼠却不影响体温调节。这说明体温调节用了含 Lmx1b 的神经细胞,但不用五羟色胺分子。

他们进一步发现:Tph2 基因敲除的小鼠睡眠减少了。特别是无论环境温度是室温还是 33℃,都减少了快动眼(REM)睡眠。因为 Tph2 敲除小鼠的体温调节没有问题,而睡眠继续有问题。从策略上,突破了药物抑制的缺陷,而且使用的 2 种敲除突变小鼠基因不同,影响的分别是神经元与五羟色胺分子,其结果可以明确的解析。通过对遗传突变体的行为和脑电分析结果提供了迄今最强的证明五羟色胺参与睡眠的证据。

文章发表于 Molecular Pharmacology,共同第一作者是张娴和闫洪铭,合作者为复旦大学上海医学院药理系的黄志力教授和他的研究生,通讯作者为北京大学的饶毅。

原始出处:Xian Zhang, Hongming Yan, Yanjia Luo, et al. Thermoregulation-Independent Regulation of Sleep by Serotonin Revealed in Mice Defective in Serotonin Synthesis. Mol Pharmacol April 9, 2018,

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    2018-07-24 jj000001
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    2018-06-17 yb6560
  5. [GetPortalCommentsPageByObjectIdResponse(id=1908429, encodeId=3b2b190842919, content=<a href='/topic/show?id=a8d0141605e' target=_blank style='color:#2F92EE;'>#pharma#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14160, encryptionId=a8d0141605e, topicName=pharma)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f634250, createdName=chentianping, createdTime=Sat Aug 11 06:49:00 CST 2018, time=2018-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1787480, encodeId=33161e874804d, content=<a href='/topic/show?id=fa03141591e' target=_blank style='color:#2F92EE;'>#Pharm#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14159, encryptionId=fa03141591e, topicName=Pharm)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8942242, createdName=jj000001, createdTime=Tue Jul 24 18:49:00 CST 2018, time=2018-07-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1788311, encodeId=4a681e88311c6, content=<a href='/topic/show?id=38e014162e2' target=_blank style='color:#2F92EE;'>#Pharmacol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14162, encryptionId=38e014162e2, topicName=Pharmacol)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=930e243, createdName=dingxiaobo, createdTime=Sat Sep 08 20:49:00 CST 2018, time=2018-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1996171, encodeId=28b419961e153, content=<a href='/topic/show?id=ed881120ec8' target=_blank style='color:#2F92EE;'>#MAC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11207, encryptionId=ed881120ec8, topicName=MAC)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4b65161, createdName=yb6560, createdTime=Sun Jun 17 19:49:00 CST 2018, time=2018-06-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1378518, encodeId=c64e13e851814, content=<a href='/topic/show?id=f4752419021' target=_blank style='color:#2F92EE;'>#五羟色胺#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=24190, encryptionId=f4752419021, topicName=五羟色胺)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=3679417, createdName=feather78, createdTime=Mon May 28 02:49:00 CST 2018, time=2018-05-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=318933, encodeId=ab923189339d, content=学习学习谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTLbTp9nZtjwVrSZNxAXbAicnKQWnic2eBdJUQYhxO36XdkstSicr7FVF8p5ReH4omtmsbnLdvZLiaJJ1A/132, createdBy=8bff2327056, createdName=kafei, createdTime=Sun May 27 07:13:11 CST 2018, time=2018-05-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=318739, encodeId=38de318e396e, content=学习了很有用不错, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3zMoyicyo6ia9f4IuLQAwZoxD6Hx4ibd5CMcOCYhStY6oDibbKK6O2X8iaicldO5ib8j1iapOIobIKCGiczU2A/0, createdBy=56251941490, createdName=虈亣靌, createdTime=Sat May 26 13:40:40 CST 2018, time=2018-05-26, status=1, ipAttribution=)]
  6. [GetPortalCommentsPageByObjectIdResponse(id=1908429, encodeId=3b2b190842919, content=<a href='/topic/show?id=a8d0141605e' target=_blank style='color:#2F92EE;'>#pharma#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14160, encryptionId=a8d0141605e, topicName=pharma)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f634250, createdName=chentianping, createdTime=Sat Aug 11 06:49:00 CST 2018, time=2018-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1787480, encodeId=33161e874804d, content=<a href='/topic/show?id=fa03141591e' target=_blank style='color:#2F92EE;'>#Pharm#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14159, encryptionId=fa03141591e, topicName=Pharm)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8942242, createdName=jj000001, createdTime=Tue Jul 24 18:49:00 CST 2018, time=2018-07-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1788311, encodeId=4a681e88311c6, content=<a href='/topic/show?id=38e014162e2' target=_blank style='color:#2F92EE;'>#Pharmacol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14162, encryptionId=38e014162e2, topicName=Pharmacol)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=930e243, createdName=dingxiaobo, createdTime=Sat Sep 08 20:49:00 CST 2018, time=2018-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1996171, encodeId=28b419961e153, content=<a href='/topic/show?id=ed881120ec8' target=_blank style='color:#2F92EE;'>#MAC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11207, encryptionId=ed881120ec8, topicName=MAC)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4b65161, createdName=yb6560, createdTime=Sun Jun 17 19:49:00 CST 2018, time=2018-06-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1378518, encodeId=c64e13e851814, content=<a href='/topic/show?id=f4752419021' target=_blank style='color:#2F92EE;'>#五羟色胺#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=24190, encryptionId=f4752419021, topicName=五羟色胺)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=3679417, createdName=feather78, createdTime=Mon May 28 02:49:00 CST 2018, time=2018-05-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=318933, encodeId=ab923189339d, content=学习学习谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTLbTp9nZtjwVrSZNxAXbAicnKQWnic2eBdJUQYhxO36XdkstSicr7FVF8p5ReH4omtmsbnLdvZLiaJJ1A/132, createdBy=8bff2327056, createdName=kafei, createdTime=Sun May 27 07:13:11 CST 2018, time=2018-05-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=318739, encodeId=38de318e396e, content=学习了很有用不错, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3zMoyicyo6ia9f4IuLQAwZoxD6Hx4ibd5CMcOCYhStY6oDibbKK6O2X8iaicldO5ib8j1iapOIobIKCGiczU2A/0, createdBy=56251941490, createdName=虈亣靌, createdTime=Sat May 26 13:40:40 CST 2018, time=2018-05-26, status=1, ipAttribution=)]
    2018-05-27 kafei

    学习学习谢谢

    0

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    2018-05-26 虈亣靌

    学习了很有用不错

    0

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