Nat Neurosci:科学家鉴定出阿尔茨海默症患者失忆的机制

2014-01-21 KOO shengwu360

阿尔茨海默症是一种不可逆的致命大脑疾病,会逐渐摧毁患者的记忆和思维能力。由于缺少有效的治疗方式,随着人口的老化,到 2050 年全球将出现 1 亿阿尔茨海默患者。日前,来自美国知名医学研究机构克利夫兰诊所(Cleveland Clinic)的科学家们鉴定了导致这些患者失忆的关键蛋白。神经连接蛋白 NLGN1 是一种突触后蛋白,存在于中枢系统的兴奋性突触中,控制着兴奋性突触的有效性和大脑的可塑性。此

阿尔茨海默症是一种不可逆的致命大脑疾病,会逐渐摧毁患者的记忆和思维能力。由于缺少有效的治疗方式,随着人口的老化,到 2050 年全球将出现 1 亿阿尔茨海默患者。

日前,来自美国知名医学研究机构克利夫兰诊所(Cleveland Clinic)的科学家们鉴定了导致这些患者失忆的关键蛋白。神经连接蛋白 NLGN1 是一种突触后蛋白,存在于中枢系统的兴奋性突触中,控制着兴奋性突触的有效性和大脑的可塑性。此前人们已经发现 NLGN1 参与了记忆的形成,现在,研究人员首次将这种蛋白与阿尔茨海默症患者的失忆联系起来。【原文下载】

在阿尔茨海默症中,β 淀粉样蛋白在患者脑部累积,会活化小胶质细胞并引发神经炎症,导致中枢神经系统的突触受损,进而造成记忆丧失。不过,此前人们对其中的机制还并不了解。

研究人员在动物模型中发现,神经炎症会影响 NLGN1 的表观遗传学修饰,干扰大脑中的突触网络。这样的网络负责记忆的形成和维持,一旦受到破坏就会导致记忆丧失。研究显示,淀粉样蛋白纤维引起的神经炎症,会在 NLGN1 的启动子区域,抑制组蛋白 H3 的乙酰化并且增强胞嘧啶的甲基化,最终减少 NLGN1 的表达。

论文资深作者 Mohamed Naguib 博士表示:“治疗阿尔茨海默症非常有挑战性,为此人们一直在进行多方面的研究。我们的发现将为人们提供治疗和预防阿尔茨海默症的新途径。”

此前, Naguib 和他的同事曾发现,一种被称为 MDA7 的化合物,能够中止影响 NLGN1 修饰的神经炎症。他们发现,这一化合物的处理可以在动物模型中,恢复认知能力、记忆和突触的可塑性,这些都是学习和记忆的关键神经学基础。

目前,研究人员已经完成了主要的前期工作,包括体外实验、前期临床毒理学和药代动力学研究。他们计划在不久的将来,开展针对 MDA7 的I期人体试验。

原文出处:


Bihua Bie, Jiang Wu, Hui Yang, Jijun J Xu, David L Brown & Mohamed Naguib. Epigenetic suppression of neuroligin 1 underlies amyloid-induced memory deficiency. Nature Neuroscience, 19 January 2014; doi:10.1038/nn.3618 【原文下载】

版权声明:
本网站所有内容来源注明为“梅斯医学”或“MedSci原创”的文字、图片和音视频资料,版权均属于梅斯医学所有。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“梅斯医学”。其它来源的文章系转载文章,或“梅斯号”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我们联系,我们将立即进行删除处理。
在此留言
评论区 (5)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=1879880, encodeId=c73c18e98807a, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Sep 19 00:10:00 CST 2014, time=2014-09-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1816604, encodeId=c9a41816604f3, content=<a href='/topic/show?id=17b59e77626' target=_blank style='color:#2F92EE;'>#阿尔茨#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=15, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97776, encryptionId=17b59e77626, topicName=阿尔茨)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/Bnia2EtH2IvyBtniaWHPQOYAicsN3IAL1ZuPV7qyALcdCiawRJdEiafMxWTxzERQW7eeKg8HfCKCRK2CJicy073C4RJg/132, createdBy=464b2500186, createdName=ms1948154235210413, createdTime=Tue Feb 04 14:10:00 CST 2014, time=2014-02-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1817627, encodeId=5ffb181e62776, content=<a href='/topic/show?id=4c9f9e777ac' target=_blank style='color:#2F92EE;'>#阿尔茨海#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=17, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97777, encryptionId=4c9f9e777ac, topicName=阿尔茨海)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=636e2500187, createdName=12498da4m32(暂无昵称), createdTime=Tue Mar 11 13:10:00 CST 2014, time=2014-03-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1363938, encodeId=0a9f1363938e8, content=<a href='/topic/show?id=7c5615628ad' target=_blank style='color:#2F92EE;'>#ROS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15628, encryptionId=7c5615628ad, topicName=ROS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=acc3210, createdName=lsndxfj, createdTime=Thu Jan 23 04:10:00 CST 2014, time=2014-01-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1469981, encodeId=79131469981e3, content=<a href='/topic/show?id=45a79e7788c' target=_blank style='color:#2F92EE;'>#阿尔茨海默#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97778, encryptionId=45a79e7788c, topicName=阿尔茨海默)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c5917090900, createdName=yhj-time, createdTime=Thu Jan 23 04:10:00 CST 2014, time=2014-01-23, status=1, ipAttribution=)]
    2014-09-19 liye789132251
  2. [GetPortalCommentsPageByObjectIdResponse(id=1879880, encodeId=c73c18e98807a, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Sep 19 00:10:00 CST 2014, time=2014-09-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1816604, encodeId=c9a41816604f3, content=<a href='/topic/show?id=17b59e77626' target=_blank style='color:#2F92EE;'>#阿尔茨#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=15, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97776, encryptionId=17b59e77626, topicName=阿尔茨)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/Bnia2EtH2IvyBtniaWHPQOYAicsN3IAL1ZuPV7qyALcdCiawRJdEiafMxWTxzERQW7eeKg8HfCKCRK2CJicy073C4RJg/132, createdBy=464b2500186, createdName=ms1948154235210413, createdTime=Tue Feb 04 14:10:00 CST 2014, time=2014-02-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1817627, encodeId=5ffb181e62776, content=<a href='/topic/show?id=4c9f9e777ac' target=_blank style='color:#2F92EE;'>#阿尔茨海#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=17, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97777, encryptionId=4c9f9e777ac, topicName=阿尔茨海)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=636e2500187, createdName=12498da4m32(暂无昵称), createdTime=Tue Mar 11 13:10:00 CST 2014, time=2014-03-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1363938, encodeId=0a9f1363938e8, content=<a href='/topic/show?id=7c5615628ad' target=_blank style='color:#2F92EE;'>#ROS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15628, encryptionId=7c5615628ad, topicName=ROS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=acc3210, createdName=lsndxfj, createdTime=Thu Jan 23 04:10:00 CST 2014, time=2014-01-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1469981, encodeId=79131469981e3, content=<a href='/topic/show?id=45a79e7788c' target=_blank style='color:#2F92EE;'>#阿尔茨海默#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97778, encryptionId=45a79e7788c, topicName=阿尔茨海默)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c5917090900, createdName=yhj-time, createdTime=Thu Jan 23 04:10:00 CST 2014, time=2014-01-23, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=1879880, encodeId=c73c18e98807a, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Sep 19 00:10:00 CST 2014, time=2014-09-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1816604, encodeId=c9a41816604f3, content=<a href='/topic/show?id=17b59e77626' target=_blank style='color:#2F92EE;'>#阿尔茨#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=15, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97776, encryptionId=17b59e77626, topicName=阿尔茨)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/Bnia2EtH2IvyBtniaWHPQOYAicsN3IAL1ZuPV7qyALcdCiawRJdEiafMxWTxzERQW7eeKg8HfCKCRK2CJicy073C4RJg/132, createdBy=464b2500186, createdName=ms1948154235210413, createdTime=Tue Feb 04 14:10:00 CST 2014, time=2014-02-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1817627, encodeId=5ffb181e62776, content=<a href='/topic/show?id=4c9f9e777ac' target=_blank style='color:#2F92EE;'>#阿尔茨海#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=17, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97777, encryptionId=4c9f9e777ac, topicName=阿尔茨海)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=636e2500187, createdName=12498da4m32(暂无昵称), createdTime=Tue Mar 11 13:10:00 CST 2014, time=2014-03-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1363938, encodeId=0a9f1363938e8, content=<a href='/topic/show?id=7c5615628ad' target=_blank style='color:#2F92EE;'>#ROS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15628, encryptionId=7c5615628ad, topicName=ROS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=acc3210, createdName=lsndxfj, createdTime=Thu Jan 23 04:10:00 CST 2014, time=2014-01-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1469981, encodeId=79131469981e3, content=<a href='/topic/show?id=45a79e7788c' target=_blank style='color:#2F92EE;'>#阿尔茨海默#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97778, encryptionId=45a79e7788c, topicName=阿尔茨海默)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c5917090900, createdName=yhj-time, createdTime=Thu Jan 23 04:10:00 CST 2014, time=2014-01-23, status=1, ipAttribution=)]
  4. [GetPortalCommentsPageByObjectIdResponse(id=1879880, encodeId=c73c18e98807a, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Sep 19 00:10:00 CST 2014, time=2014-09-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1816604, encodeId=c9a41816604f3, content=<a href='/topic/show?id=17b59e77626' target=_blank style='color:#2F92EE;'>#阿尔茨#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=15, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97776, encryptionId=17b59e77626, topicName=阿尔茨)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/Bnia2EtH2IvyBtniaWHPQOYAicsN3IAL1ZuPV7qyALcdCiawRJdEiafMxWTxzERQW7eeKg8HfCKCRK2CJicy073C4RJg/132, createdBy=464b2500186, createdName=ms1948154235210413, createdTime=Tue Feb 04 14:10:00 CST 2014, time=2014-02-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1817627, encodeId=5ffb181e62776, content=<a href='/topic/show?id=4c9f9e777ac' target=_blank style='color:#2F92EE;'>#阿尔茨海#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=17, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97777, encryptionId=4c9f9e777ac, topicName=阿尔茨海)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=636e2500187, createdName=12498da4m32(暂无昵称), createdTime=Tue Mar 11 13:10:00 CST 2014, time=2014-03-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1363938, encodeId=0a9f1363938e8, content=<a href='/topic/show?id=7c5615628ad' target=_blank style='color:#2F92EE;'>#ROS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15628, encryptionId=7c5615628ad, topicName=ROS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=acc3210, createdName=lsndxfj, createdTime=Thu Jan 23 04:10:00 CST 2014, time=2014-01-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1469981, encodeId=79131469981e3, content=<a href='/topic/show?id=45a79e7788c' target=_blank style='color:#2F92EE;'>#阿尔茨海默#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97778, encryptionId=45a79e7788c, topicName=阿尔茨海默)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c5917090900, createdName=yhj-time, createdTime=Thu Jan 23 04:10:00 CST 2014, time=2014-01-23, status=1, ipAttribution=)]
    2014-01-23 lsndxfj
  5. [GetPortalCommentsPageByObjectIdResponse(id=1879880, encodeId=c73c18e98807a, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Sep 19 00:10:00 CST 2014, time=2014-09-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1816604, encodeId=c9a41816604f3, content=<a href='/topic/show?id=17b59e77626' target=_blank style='color:#2F92EE;'>#阿尔茨#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=15, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97776, encryptionId=17b59e77626, topicName=阿尔茨)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/Bnia2EtH2IvyBtniaWHPQOYAicsN3IAL1ZuPV7qyALcdCiawRJdEiafMxWTxzERQW7eeKg8HfCKCRK2CJicy073C4RJg/132, createdBy=464b2500186, createdName=ms1948154235210413, createdTime=Tue Feb 04 14:10:00 CST 2014, time=2014-02-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1817627, encodeId=5ffb181e62776, content=<a href='/topic/show?id=4c9f9e777ac' target=_blank style='color:#2F92EE;'>#阿尔茨海#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=17, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97777, encryptionId=4c9f9e777ac, topicName=阿尔茨海)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=636e2500187, createdName=12498da4m32(暂无昵称), createdTime=Tue Mar 11 13:10:00 CST 2014, time=2014-03-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1363938, encodeId=0a9f1363938e8, content=<a href='/topic/show?id=7c5615628ad' target=_blank style='color:#2F92EE;'>#ROS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15628, encryptionId=7c5615628ad, topicName=ROS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=acc3210, createdName=lsndxfj, createdTime=Thu Jan 23 04:10:00 CST 2014, time=2014-01-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1469981, encodeId=79131469981e3, content=<a href='/topic/show?id=45a79e7788c' target=_blank style='color:#2F92EE;'>#阿尔茨海默#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97778, encryptionId=45a79e7788c, topicName=阿尔茨海默)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c5917090900, createdName=yhj-time, createdTime=Thu Jan 23 04:10:00 CST 2014, time=2014-01-23, status=1, ipAttribution=)]