Autophagy:脑缺血诱导的自噬上调预示着神经元的溶酶体紊乱和突触损伤

2020-11-14 haibei MedSci原创

巨自噬/自噬对神经元的稳态和功能至关重要。积累的证据表明,自噬在脑缺血期间受损,导致神经元功能障碍和神经变性。然而,williamhill asia 对于自噬机制瞬时改变后的结果尚不完全清楚。

巨自噬/自噬对神经元的稳态和功能至关重要。积累的证据表明,自噬在脑缺血期间受损,导致神经元功能障碍和神经变性。然而,williamhill asia 对于自噬机制瞬时改变后的结果尚不完全清楚。

最近,研究人员在Autophagy杂志发文,其利用大鼠海马神经元氧-葡萄糖剥夺(OGD)模型和小鼠大脑中动脉闭塞(MCAO)模型,研究缺血应激对自噬和突触结构的影响。

结果显示,急性缺血后,最初的自噬修饰以上调方式发生。继而,溶酶体的数量以及溶酶体体积增加,表明溶酶体储存功能障碍。

通过3-甲基腺嘌呤(3-MA)处理或ATG7(自噬相关7)敲除抑制自噬可以阻止这些变化的发生。相反,通过雷帕霉素(RAPA)激活自噬可以模拟这些变化。这表明,功能失调的溶酶体储存与自噬的早期爆发有关。

由于再灌注过程中MTOR依赖的溶酶体生物发生的基础水平不足,瞬时自噬上调后,自噬底物不能被及时清除,因此溶酶体储存功能障碍导致自噬功能障碍。

进一步调查发现,突触超结构的损伤,伴随着溶酶体储存功能障碍,可能是突触蛋白动态周转失败所致。这说明自噬-溶酶体机制在突触结构的维持中起着至关重要的作用。

这项研究支持了之前的证据,即神经元自噬上调后可能会出现溶酶体储存功能障碍。适当的自噬体-溶酶体功能对神经元突触功能的维持至关重要,其影响的不仅仅是少数已知的突触蛋白。

 

原始出处:

Xia Zhang et al. Ischemia-induced upregulation of autophagy preludes dysfunctional lysosomal storage and associated synaptic impairments in neurons. Autophagy (2020). DOI: https://doi.org/10.1080/15548627.2020.1840796

 

版权声明:
本网站所有内容来源注明为“williamhill asia 医学”或“MedSci原创”的文字、图片和音视频资料,版权均属于williamhill asia 医学所有。非经授权,任何媒体、网站或个人不得转载,授权转载时须注明来源为“williamhill asia 医学”。其它来源的文章系转载文章,或“williamhill asia 号”自媒体发布的文章,仅系出于传递更多信息之目的,本站仅负责审核内容合规,其内容不代表本站立场,本站不负责内容的准确性和版权。如果存在侵权、或不希望被转载的媒体或个人可与williamhill asia 联系,williamhill asia 将立即进行删除处理。
在此留言
评论区 (4)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=922098, encodeId=0519922098c0, content=不错的文章, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=3f295295897, createdName=14873728m62暂无昵称, createdTime=Tue Feb 02 04:30:02 CST 2021, time=2021-02-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1289242, encodeId=8e91128924226, content=<a href='/topic/show?id=cd268500578' target=_blank style='color:#2F92EE;'>#脑缺血#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=85005, encryptionId=cd268500578, topicName=脑缺血)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=845e216, createdName=cqlidoudou, createdTime=Mon Nov 16 02:31:04 CST 2020, time=2020-11-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1398065, encodeId=3c71139806558, content=<a href='/topic/show?id=8bee565436d' target=_blank style='color:#2F92EE;'>#损伤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=56543, encryptionId=8bee565436d, topicName=损伤)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eoNX3lUOlDKGBUEPNwZx0nibmdcFyeibnX4WMhUSCU2REpGRWtSmnT2CCs0dA5waxvJknYDxwtYnIcQ/132, createdBy=294e2500218, createdName=ms3046638856685384, createdTime=Mon Nov 16 02:31:04 CST 2020, time=2020-11-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1478802, encodeId=f79f14e8802d6, content=<a href='/topic/show?id=76efe555021' target=_blank style='color:#2F92EE;'>#突触#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=75550, encryptionId=76efe555021, topicName=突触)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c5207457717, createdName=ms691033630344116, createdTime=Mon Nov 16 02:31:04 CST 2020, time=2020-11-16, status=1, ipAttribution=)]
    2021-02-02 14873728m62暂无昵称

    不错的文章

    0

  2. [GetPortalCommentsPageByObjectIdResponse(id=922098, encodeId=0519922098c0, content=不错的文章, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=3f295295897, createdName=14873728m62暂无昵称, createdTime=Tue Feb 02 04:30:02 CST 2021, time=2021-02-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1289242, encodeId=8e91128924226, content=<a href='/topic/show?id=cd268500578' target=_blank style='color:#2F92EE;'>#脑缺血#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=85005, encryptionId=cd268500578, topicName=脑缺血)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=845e216, createdName=cqlidoudou, createdTime=Mon Nov 16 02:31:04 CST 2020, time=2020-11-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1398065, encodeId=3c71139806558, content=<a href='/topic/show?id=8bee565436d' target=_blank style='color:#2F92EE;'>#损伤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=56543, encryptionId=8bee565436d, topicName=损伤)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eoNX3lUOlDKGBUEPNwZx0nibmdcFyeibnX4WMhUSCU2REpGRWtSmnT2CCs0dA5waxvJknYDxwtYnIcQ/132, createdBy=294e2500218, createdName=ms3046638856685384, createdTime=Mon Nov 16 02:31:04 CST 2020, time=2020-11-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1478802, encodeId=f79f14e8802d6, content=<a href='/topic/show?id=76efe555021' target=_blank style='color:#2F92EE;'>#突触#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=75550, encryptionId=76efe555021, topicName=突触)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c5207457717, createdName=ms691033630344116, createdTime=Mon Nov 16 02:31:04 CST 2020, time=2020-11-16, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=922098, encodeId=0519922098c0, content=不错的文章, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=3f295295897, createdName=14873728m62暂无昵称, createdTime=Tue Feb 02 04:30:02 CST 2021, time=2021-02-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1289242, encodeId=8e91128924226, content=<a href='/topic/show?id=cd268500578' target=_blank style='color:#2F92EE;'>#脑缺血#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=85005, encryptionId=cd268500578, topicName=脑缺血)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=845e216, createdName=cqlidoudou, createdTime=Mon Nov 16 02:31:04 CST 2020, time=2020-11-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1398065, encodeId=3c71139806558, content=<a href='/topic/show?id=8bee565436d' target=_blank style='color:#2F92EE;'>#损伤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=56543, encryptionId=8bee565436d, topicName=损伤)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eoNX3lUOlDKGBUEPNwZx0nibmdcFyeibnX4WMhUSCU2REpGRWtSmnT2CCs0dA5waxvJknYDxwtYnIcQ/132, createdBy=294e2500218, createdName=ms3046638856685384, createdTime=Mon Nov 16 02:31:04 CST 2020, time=2020-11-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1478802, encodeId=f79f14e8802d6, content=<a href='/topic/show?id=76efe555021' target=_blank style='color:#2F92EE;'>#突触#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=75550, encryptionId=76efe555021, topicName=突触)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c5207457717, createdName=ms691033630344116, createdTime=Mon Nov 16 02:31:04 CST 2020, time=2020-11-16, status=1, ipAttribution=)]
  4. [GetPortalCommentsPageByObjectIdResponse(id=922098, encodeId=0519922098c0, content=不错的文章, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=3f295295897, createdName=14873728m62暂无昵称, createdTime=Tue Feb 02 04:30:02 CST 2021, time=2021-02-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1289242, encodeId=8e91128924226, content=<a href='/topic/show?id=cd268500578' target=_blank style='color:#2F92EE;'>#脑缺血#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=85005, encryptionId=cd268500578, topicName=脑缺血)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=845e216, createdName=cqlidoudou, createdTime=Mon Nov 16 02:31:04 CST 2020, time=2020-11-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1398065, encodeId=3c71139806558, content=<a href='/topic/show?id=8bee565436d' target=_blank style='color:#2F92EE;'>#损伤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=56543, encryptionId=8bee565436d, topicName=损伤)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eoNX3lUOlDKGBUEPNwZx0nibmdcFyeibnX4WMhUSCU2REpGRWtSmnT2CCs0dA5waxvJknYDxwtYnIcQ/132, createdBy=294e2500218, createdName=ms3046638856685384, createdTime=Mon Nov 16 02:31:04 CST 2020, time=2020-11-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1478802, encodeId=f79f14e8802d6, content=<a href='/topic/show?id=76efe555021' target=_blank style='color:#2F92EE;'>#突触#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=75550, encryptionId=76efe555021, topicName=突触)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c5207457717, createdName=ms691033630344116, createdTime=Mon Nov 16 02:31:04 CST 2020, time=2020-11-16, status=1, ipAttribution=)]

相关威廉亚洲官网

Nat Commun:自噬激活药物可长期清除阿尔兹海默相关tau蛋白

研究人员探索了自噬作为减少人类神经元tau负担的机制,并从小分子筛选中,发现了mTOR抑制剂OSI-027、AZD2014和AZD8055。

MOL CELL:饥饿为何也能引起脂肪肝?

已有的研究显示,自噬能够被长期禁食激活,但不能克服随之而来的肝脏脂质超载,导致脂肪肝。

J Periodontal Res:苯妥英钠改善牙龈成纤维细胞的老化与自噬相关

这篇研究的目的是为了评估phenytoin对老化牙龈成纤维细胞的作用是否与自噬通路有关。

Autophagy:大麻素通过抑制自噬导致运动功能障碍

目前,大麻的娱乐和医疗使用在全世界范围内大体上在增加。然而,大麻的使用可能会引起不良的副作用,因此,开展旨在了解和可能减少大麻引起的危害的创新研究十分重要。

Autophagy: 复旦研究人员发现,雷帕霉素可以防止自然流产

临床上公认,自然流产与10-15%的人类妊娠有关。虽然有研究报道,各种因素(如染色体和子宫结构异常、内分泌异常、子宫内膜感染和免疫因素等)参与了自然流产的病因,但其根本机制仍不清楚。

Autophagy:抗抑郁药舍曲林靶向线粒体VDAC1蛋白调控自噬

研究人员进一步表明,Sert通过诱导自噬,促进MAPT(微管相关蛋白tau)蛋白的自噬降解,从而抑制tau病。