Baidu
map

Brain:Duang!年轻人也会患老年痴呆!

2015-03-05 佚名 生物谷

近日,刊登在国际著名杂志Brain上的一篇研究论文中,来自美国西北大学的研究人员通过研究首次在20岁的年轻人大脑中的神经元中发现了淀粉样蛋白的积累,淀粉样蛋白是一种积累在大脑中的异常蛋白,其也是阿尔兹海默氏症发病的主要标志。 研究者认为,这项研究首次揭示了在年轻人的大脑中也会存在淀粉样蛋白的积累,而科学界长期以来一直认为这种蛋白仅会在老年人或阿尔兹海默氏症患者大脑神经元的外部进行积累;研究者Cha

近日,刊登在国际著名杂志Brain上的一篇研究论文中,来自美国西北大学的研究人员通过研究首次在20岁的年轻人大脑中的神经元中发现了淀粉样蛋白的积累,淀粉样蛋白是一种积累在大脑中的异常蛋白,其也是阿尔兹海默氏症发病的主要标志。

研究者认为,这项研究首次揭示了在年轻人的大脑中也会存在淀粉样蛋白的积累,而科学界长期以来一直认为这种蛋白仅会在老年人或阿尔兹海默氏症患者大脑神经元的外部进行积累;研究者Changiz Geula教授说道,我们在年轻人大脑中发现淀粉样蛋白的存在让我们感觉非常震惊,而淀粉样蛋白在大脑中积累时间长了会严重影响个体的机体健康。

这项研究中研究人员检测了个体基底前脑的胆碱能神经元来帮助理解为何这些神经元会在早期被损伤而且为何在老年人和阿尔兹海默氏症患者机体中也是第一个死亡的神经元,这些神经元主要参与记忆力和注意力的发育;文章中研究者对三组已故的个体进行这些胆碱能神经元的检测,这三组个体分别为年龄在20至66岁的13名认知正常的个体;年龄在70至99岁的16名非痴呆症老年个体以及年龄在60至95岁的21名患阿尔兹海默氏症的老年个体。

研究者发现淀粉样蛋白分子在这些个体的年轻时代就开始在大脑的神经元中开始积累了,而且会伴随其一生不断积累存在,而大脑中其它区域的神经细胞并不会表现出相同的淀粉样蛋白的积累,神经元中的淀粉样蛋白会形成小型的毒性团聚物,即淀粉样蛋白多聚体,其就存在于20岁左右的年轻个体的大脑中。

Geula表示,问题的关键在于为何这些神经元会早死,淀粉样蛋白形成小型多聚体或许就是关键点,神经元中淀粉样蛋白的积累有可能会引发这些细胞对病理学突变变得易感,进而促进神经元早死;而不断积累状态的淀粉样蛋白多聚体也会对神经元形成损伤并且最终杀死神经元;淀粉样蛋白团聚物会通过向细胞外分泌淀粉样蛋白来促进神经元损伤,从而在阿尔兹海默氏症患者机体中形成大量的淀粉样斑块;最后研究人员希望后期可以进行更为深入的研究来揭示神经元内部的淀粉样蛋白诱发神经元损伤的分子机理,从而为开发新型疗法提供希望。

原始出处:

Neuronal amyloid-β accumulation within cholinergic basal forebrain in ageing and Alzheimer’s disease Brain 2 March 2015

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 (6)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=21768, encodeId=9dee21e68e4, content=有意思, beContent=null, objectType=article, channel=null, level=null, likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=63461620684, createdName=yuena, createdTime=Thu Apr 23 14:02:00 CST 2015, time=2015-04-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18721, encodeId=225d18e212d, content=?, beContent=null, objectType=article, channel=null, level=null, likeNumber=130, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=sky0909, createdTime=Tue Mar 24 21:13:00 CST 2015, time=2015-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18722, encodeId=7a9718e220c, content=?, beContent=null, objectType=article, channel=null, level=null, likeNumber=146, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=sky0909, createdTime=Tue Mar 24 21:13:00 CST 2015, time=2015-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17911, encodeId=a4651e911d9, content=痴呆了就去死, beContent=null, objectType=article, channel=null, level=null, likeNumber=142, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=36a81612921, createdName=xiaoai5777, createdTime=Sat Mar 07 22:22:00 CST 2015, time=2015-03-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17781, encodeId=cf2a1e7818c, content=有淀粉样蛋白不等于AD, beContent=null, objectType=article, channel=null, level=null, likeNumber=135, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=49.4.167.**, createdTime=Thu Mar 05 21:55:00 CST 2015, time=2015-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17771, encodeId=18451e77145, content=要痴呆了,仲么办?, beContent=null, objectType=article, channel=null, level=null, likeNumber=146, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=drhqh240, createdTime=Thu Mar 05 19:30:00 CST 2015, time=2015-03-05, status=1, ipAttribution=)]
    2015-04-23 yuena

    有意思

    0

  2. [GetPortalCommentsPageByObjectIdResponse(id=21768, encodeId=9dee21e68e4, content=有意思, beContent=null, objectType=article, channel=null, level=null, likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=63461620684, createdName=yuena, createdTime=Thu Apr 23 14:02:00 CST 2015, time=2015-04-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18721, encodeId=225d18e212d, content=?, beContent=null, objectType=article, channel=null, level=null, likeNumber=130, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=sky0909, createdTime=Tue Mar 24 21:13:00 CST 2015, time=2015-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18722, encodeId=7a9718e220c, content=?, beContent=null, objectType=article, channel=null, level=null, likeNumber=146, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=sky0909, createdTime=Tue Mar 24 21:13:00 CST 2015, time=2015-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17911, encodeId=a4651e911d9, content=痴呆了就去死, beContent=null, objectType=article, channel=null, level=null, likeNumber=142, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=36a81612921, createdName=xiaoai5777, createdTime=Sat Mar 07 22:22:00 CST 2015, time=2015-03-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17781, encodeId=cf2a1e7818c, content=有淀粉样蛋白不等于AD, beContent=null, objectType=article, channel=null, level=null, likeNumber=135, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=49.4.167.**, createdTime=Thu Mar 05 21:55:00 CST 2015, time=2015-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17771, encodeId=18451e77145, content=要痴呆了,仲么办?, beContent=null, objectType=article, channel=null, level=null, likeNumber=146, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=drhqh240, createdTime=Thu Mar 05 19:30:00 CST 2015, time=2015-03-05, status=1, ipAttribution=)]
    2015-03-24 sky0909

    0

  3. [GetPortalCommentsPageByObjectIdResponse(id=21768, encodeId=9dee21e68e4, content=有意思, beContent=null, objectType=article, channel=null, level=null, likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=63461620684, createdName=yuena, createdTime=Thu Apr 23 14:02:00 CST 2015, time=2015-04-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18721, encodeId=225d18e212d, content=?, beContent=null, objectType=article, channel=null, level=null, likeNumber=130, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=sky0909, createdTime=Tue Mar 24 21:13:00 CST 2015, time=2015-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18722, encodeId=7a9718e220c, content=?, beContent=null, objectType=article, channel=null, level=null, likeNumber=146, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=sky0909, createdTime=Tue Mar 24 21:13:00 CST 2015, time=2015-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17911, encodeId=a4651e911d9, content=痴呆了就去死, beContent=null, objectType=article, channel=null, level=null, likeNumber=142, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=36a81612921, createdName=xiaoai5777, createdTime=Sat Mar 07 22:22:00 CST 2015, time=2015-03-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17781, encodeId=cf2a1e7818c, content=有淀粉样蛋白不等于AD, beContent=null, objectType=article, channel=null, level=null, likeNumber=135, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=49.4.167.**, createdTime=Thu Mar 05 21:55:00 CST 2015, time=2015-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17771, encodeId=18451e77145, content=要痴呆了,仲么办?, beContent=null, objectType=article, channel=null, level=null, likeNumber=146, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=drhqh240, createdTime=Thu Mar 05 19:30:00 CST 2015, time=2015-03-05, status=1, ipAttribution=)]
    2015-03-24 sky0909

    0

  4. [GetPortalCommentsPageByObjectIdResponse(id=21768, encodeId=9dee21e68e4, content=有意思, beContent=null, objectType=article, channel=null, level=null, likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=63461620684, createdName=yuena, createdTime=Thu Apr 23 14:02:00 CST 2015, time=2015-04-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18721, encodeId=225d18e212d, content=?, beContent=null, objectType=article, channel=null, level=null, likeNumber=130, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=sky0909, createdTime=Tue Mar 24 21:13:00 CST 2015, time=2015-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18722, encodeId=7a9718e220c, content=?, beContent=null, objectType=article, channel=null, level=null, likeNumber=146, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=sky0909, createdTime=Tue Mar 24 21:13:00 CST 2015, time=2015-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17911, encodeId=a4651e911d9, content=痴呆了就去死, beContent=null, objectType=article, channel=null, level=null, likeNumber=142, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=36a81612921, createdName=xiaoai5777, createdTime=Sat Mar 07 22:22:00 CST 2015, time=2015-03-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17781, encodeId=cf2a1e7818c, content=有淀粉样蛋白不等于AD, beContent=null, objectType=article, channel=null, level=null, likeNumber=135, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=49.4.167.**, createdTime=Thu Mar 05 21:55:00 CST 2015, time=2015-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17771, encodeId=18451e77145, content=要痴呆了,仲么办?, beContent=null, objectType=article, channel=null, level=null, likeNumber=146, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=drhqh240, createdTime=Thu Mar 05 19:30:00 CST 2015, time=2015-03-05, status=1, ipAttribution=)]
    2015-03-07 xiaoai5777

    痴呆了就去死

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=21768, encodeId=9dee21e68e4, content=有意思, beContent=null, objectType=article, channel=null, level=null, likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=63461620684, createdName=yuena, createdTime=Thu Apr 23 14:02:00 CST 2015, time=2015-04-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18721, encodeId=225d18e212d, content=?, beContent=null, objectType=article, channel=null, level=null, likeNumber=130, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=sky0909, createdTime=Tue Mar 24 21:13:00 CST 2015, time=2015-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18722, encodeId=7a9718e220c, content=?, beContent=null, objectType=article, channel=null, level=null, likeNumber=146, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=sky0909, createdTime=Tue Mar 24 21:13:00 CST 2015, time=2015-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17911, encodeId=a4651e911d9, content=痴呆了就去死, beContent=null, objectType=article, channel=null, level=null, likeNumber=142, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=36a81612921, createdName=xiaoai5777, createdTime=Sat Mar 07 22:22:00 CST 2015, time=2015-03-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17781, encodeId=cf2a1e7818c, content=有淀粉样蛋白不等于AD, beContent=null, objectType=article, channel=null, level=null, likeNumber=135, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=49.4.167.**, createdTime=Thu Mar 05 21:55:00 CST 2015, time=2015-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17771, encodeId=18451e77145, content=要痴呆了,仲么办?, beContent=null, objectType=article, channel=null, level=null, likeNumber=146, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=drhqh240, createdTime=Thu Mar 05 19:30:00 CST 2015, time=2015-03-05, status=1, ipAttribution=)]
    2015-03-05 49.4.167.**

    有淀粉样蛋白不等于AD

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=21768, encodeId=9dee21e68e4, content=有意思, beContent=null, objectType=article, channel=null, level=null, likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=63461620684, createdName=yuena, createdTime=Thu Apr 23 14:02:00 CST 2015, time=2015-04-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18721, encodeId=225d18e212d, content=?, beContent=null, objectType=article, channel=null, level=null, likeNumber=130, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=sky0909, createdTime=Tue Mar 24 21:13:00 CST 2015, time=2015-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18722, encodeId=7a9718e220c, content=?, beContent=null, objectType=article, channel=null, level=null, likeNumber=146, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=sky0909, createdTime=Tue Mar 24 21:13:00 CST 2015, time=2015-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17911, encodeId=a4651e911d9, content=痴呆了就去死, beContent=null, objectType=article, channel=null, level=null, likeNumber=142, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=36a81612921, createdName=xiaoai5777, createdTime=Sat Mar 07 22:22:00 CST 2015, time=2015-03-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17781, encodeId=cf2a1e7818c, content=有淀粉样蛋白不等于AD, beContent=null, objectType=article, channel=null, level=null, likeNumber=135, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=49.4.167.**, createdTime=Thu Mar 05 21:55:00 CST 2015, time=2015-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=17771, encodeId=18451e77145, content=要痴呆了,仲么办?, beContent=null, objectType=article, channel=null, level=null, likeNumber=146, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=drhqh240, createdTime=Thu Mar 05 19:30:00 CST 2015, time=2015-03-05, status=1, ipAttribution=)]
    2015-03-05 drhqh240

    要痴呆了,仲么办?

    0

相关资讯

Alzheimer''s & Dementia:男性睡眠障碍易患老年痴呆

近日研究发现,在一项新的研究中,来自Uppsala大学的研究人员表明,那些自我报告睡眠障碍的老年人比那些没有自我报告睡眠障碍的老年人经历阿尔兹海默症具有高危风险性。该内容结果发表在科学杂志《阿尔茨海默病和痴呆》。 研究人员跟踪调查了1000名1970年和2010年之间出生的男性。研究结果表明,在40年的随访期间自我报告睡眠障碍的患者与患阿尔茨海默氏症的风险密切相关,特别是这种疾病在他们的晚年

Ann Clin Transl Neurol:老年痴呆,皮肤测试早诊断

根据公布在第67届美国神经病学会的一项研究:科学家发现皮肤测试可能有助更早揭示阿尔茨海默氏症和帕金森氏病。新研究表明,皮肤活检可用于检测这两种疾病中某些异常蛋白水平的升高。   研究报告的作者Ildefonso Rodriguez-Leyva,MD表示:到现在为止,没有脑活检的话,病理证实疾病是不可能的,所以这些疾病经常得不到诊断,直到病情进展。研究假设在胚胎时,皮肤与脑组织一

FDA批准阿特维斯Namzaric治疗阿尔茨海默氏型老年痴呆

全球仿制药巨头阿特维斯(Actavis)与合作伙伴Adamas制药公司近日宣布,复方新药Namzaric已获FDA批准用于正接受盐酸美金刚和盐酸多奈哌齐治疗且病情稳定的中度至重度阿尔茨海默氏型老年性痴呆(Alzheimer's type dementia)的治疗。阿特维斯计划于2015年将Namzaric推向市场。 Namzaric是一种每日一次的口服胶囊,由固定剂量美金刚和多奈哌齐(meman

JEM:控制食欲肽远离老年痴呆

近日,来自华盛顿大学医学院的研究人员通过研究发现,刺激大脑从睡眠中苏醒过来的蛋白质或是抑制阿尔兹海默氏症的新型靶点,相关研究发表于国际杂志The Journal of Experimental Medicine上。近些年来,科学家们发现了个体睡眠问题和阿尔兹海默氏症之间的关联,比如研究者在小鼠和人类机体中研究发现,睡眠的缺失会引发大脑中斑块的产生,而斑块的产生正是阿尔兹海默氏症的发病特征,同时也会

Cell Reports :模拟平滑肌细胞 有助理解老年痴呆

项新的科学研究显示,科学家可以培养成长出与脑动脉中平滑肌肉细胞非常相似的细胞,这就将使其更容易研究血管疾病对神经退行性疾病的贡献。 平滑肌细胞是血管壁的一个重要组成部分,但出人意料的是,它们是器官特异性:例如脑动脉平滑肌细胞不同于冠状动脉的平滑肌细胞。这些细胞的详细属性在疾病过程中很重要的。因此,在实验室中研究疾病如阿尔茨海默氏病(AD)或血管性痴呆所使用的细胞需要紧密匹配活脑中的细胞。 分子

PNAS:施一公发现老年性痴呆潜在治疗药物

来自清华大学的研究人员证实,古细菌presenilin同系物PSH能够像人类γ-secretase一样裂解淀粉样前体蛋白(APP)。这一研究发现有可能会推动发现γ-secretase的抑制剂及调节剂。相关论文发表在3月2日的《美国国家科学院院刊》(PNAS)上。 清华大学的施一公(Yigong Shi)教授是这篇论文的通讯作者。施一公研究组主要致力于运用结构生物学和生物化学的

Baidu
map
Baidu
map
Baidu
map