Alzheimer's dementia: 哈佛大学发现:具有痴呆症遗传风险者,神经丝轻链蛋白明显升高

2021-02-08 Freeman MedSci原创

哈佛大学发现:具有痴呆症遗传风险者,神经丝轻链蛋白明显升高

 

目前迫切需要广泛使用且价格低廉的阿尔茨海默病(AD)生物标志物,这些生物标志物可用于临床试验,以评估疾病改良药物的疗效。一个有希望的候选者是神经丝轻链蛋白(NfL),这是一种敏感的早期神经元损伤和轴突变性的标志物,已被证明在临床前AD中升高。

最近发现常染色体显性AD(ADAD)亲属的血浆NfL水平显著升高,他们多会发展成早发性痴呆。血浆NfL水平在ADAD mutation携带者和非携带者家庭成员之间微妙地开始呈现区别,突变携带者比同亲属的临床症状发病早22年。

较高的血浆NfL基线水平预示着该病临床前阶段认知能力下降较大。这些研究结果与显性遗传性阿尔茨海默氏病网络(DIAN)的研究结果一致,DIAN报道,血清NfL水平可以在临床症状发病的预期年龄前7~16年区分突变携带者和非携带者。许多研究研究共同表明,基于血液的NfL水平对ADAD的早期神经元变性很敏感。

横断面研究报告显示 更高的血浆NfL水平与以下指标相关:海马萎缩增加、皮层变薄、楔前体(precuneus)皮层厚度减少、全脑体积,以及这些区域的代谢减少。

同样,对家族性和散发性AD的纵向研究也表明,血液中较高的基线NfL浓度与随后楔前体的减少率、皮层厚度、白质强度变化较快、且有较大的糖代谢和认知能力下降相关。

哈佛大学的Edmarie Guzmán-Vélez探究了血浆NfL是否与体内淀粉样蛋白β和tau,以及非痴呆的presenilin-1(PSEN1)E280A突变携带者的认知表现相关。

他们纳入了25名突变携带者和19名非携带者(年龄范围:28至49岁)。参与者进行了11C匹兹堡化合物B(PiB)-PET(评估Aβ蛋白)、氟尿嘧啶-PET(评估tau)、血液采样和认知测试。

结果显示:突变携带者的血浆NfL水平高于非携带者。

在携带者中,较高的NfL水平与更大的区域tau负担和更差的认知有关,但与淀粉样蛋白β负荷无关。当调整年龄(反应疾病进展的重要指标)时,血浆NfL水平升高仅与更差的记忆力相关。

这个研究的重要意义在于,发现了具有AD痴呆症遗传风险的非痴呆个体的血浆NfL、认知和tau病理之间存在关联。血浆NfL可能有助于选择风险增加的个体和跟踪AD的疾病进展。


原文出处:
Guzmán-Vélez, E., Zetterberg, H.,et al. Associations between plasma neurofilament light, in vivo brain pathology, and cognition in non-demented individuals with autosomal-dominant Alzheimer's disease. _Alzheimer's & dementia: the journal of the Alzheimer's Association_.

 

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    2021-05-20 Boyinsh
  4. [GetPortalCommentsPageByObjectIdResponse(id=1935009, encodeId=ace819350095c, content=<a href='/topic/show?id=df6ee41476f' target=_blank style='color:#2F92EE;'>#神经丝轻链#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74147, encryptionId=df6ee41476f, topicName=神经丝轻链)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0bed488, createdName=jktdtl, createdTime=Thu Jul 15 16:51:15 CST 2021, time=2021-07-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1801673, encodeId=032918016e37d, content=<a href='/topic/show?id=91f1e4142bd' target=_blank style='color:#2F92EE;'>#神经丝#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=42, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74142, encryptionId=91f1e4142bd, topicName=神经丝)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1d01326, createdName=lizhou0204, createdTime=Thu Sep 09 13:51:15 CST 2021, time=2021-09-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1836249, encodeId=62cb183624944, content=<a href='/topic/show?id=4613e1212fc' target=_blank style='color:#2F92EE;'>#痴呆症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71212, encryptionId=4613e1212fc, topicName=痴呆症)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=726030, createdName=Boyinsh, createdTime=Thu May 20 16:51:15 CST 2021, time=2021-05-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1717988, encodeId=ebe51e1798892, content=<a href='/topic/show?id=8f0658433a' target=_blank style='color:#2F92EE;'>#dementia#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5843, encryptionId=8f0658433a, topicName=dementia)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=307e32501717, createdName=linlin2323, createdTime=Thu Nov 25 05:51:15 CST 2021, time=2021-11-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1361958, encodeId=cfb9136195821, content=<a href='/topic/show?id=651f9521535' target=_blank style='color:#2F92EE;'>#遗传风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=95215, encryptionId=651f9521535, topicName=遗传风险)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a12645, createdName=docwu2019, createdTime=Tue Feb 09 21:51:15 CST 2021, time=2021-02-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1557516, encodeId=e52d155e516c2, content=<a href='/topic/show?id=7bec398e2e6' target=_blank style='color:#2F92EE;'>#哈佛#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=39872, encryptionId=7bec398e2e6, topicName=哈佛)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=1c7014916331, createdName=amyloid, createdTime=Tue Feb 09 21:51:15 CST 2021, time=2021-02-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1617599, encodeId=c204161e599eb, content=<a href='/topic/show?id=9619e4148ef' target=_blank style='color:#2F92EE;'>#神经丝轻链蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74148, encryptionId=9619e4148ef, topicName=神经丝轻链蛋白)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=8dec19785391, createdName=HinsMax, createdTime=Tue Feb 09 21:51:15 CST 2021, time=2021-02-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1048721, encodeId=ac6c1048e2122, content=老年人痴呆何药可用??, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=junJUN, createdTime=Mon Feb 08 09:51:15 CST 2021, time=2021-02-08, status=1, ipAttribution=)]
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  6. [GetPortalCommentsPageByObjectIdResponse(id=1935009, encodeId=ace819350095c, content=<a href='/topic/show?id=df6ee41476f' target=_blank style='color:#2F92EE;'>#神经丝轻链#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74147, encryptionId=df6ee41476f, topicName=神经丝轻链)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0bed488, createdName=jktdtl, createdTime=Thu Jul 15 16:51:15 CST 2021, time=2021-07-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1801673, encodeId=032918016e37d, content=<a href='/topic/show?id=91f1e4142bd' target=_blank style='color:#2F92EE;'>#神经丝#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=42, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74142, encryptionId=91f1e4142bd, topicName=神经丝)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1d01326, createdName=lizhou0204, createdTime=Thu Sep 09 13:51:15 CST 2021, time=2021-09-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1836249, encodeId=62cb183624944, content=<a href='/topic/show?id=4613e1212fc' target=_blank style='color:#2F92EE;'>#痴呆症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71212, encryptionId=4613e1212fc, topicName=痴呆症)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=726030, createdName=Boyinsh, createdTime=Thu May 20 16:51:15 CST 2021, time=2021-05-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1717988, encodeId=ebe51e1798892, content=<a href='/topic/show?id=8f0658433a' target=_blank style='color:#2F92EE;'>#dementia#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5843, encryptionId=8f0658433a, topicName=dementia)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=307e32501717, createdName=linlin2323, createdTime=Thu Nov 25 05:51:15 CST 2021, time=2021-11-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1361958, encodeId=cfb9136195821, content=<a href='/topic/show?id=651f9521535' target=_blank style='color:#2F92EE;'>#遗传风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=95215, encryptionId=651f9521535, topicName=遗传风险)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a12645, createdName=docwu2019, createdTime=Tue Feb 09 21:51:15 CST 2021, time=2021-02-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1557516, encodeId=e52d155e516c2, content=<a href='/topic/show?id=7bec398e2e6' target=_blank style='color:#2F92EE;'>#哈佛#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=39872, encryptionId=7bec398e2e6, topicName=哈佛)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=1c7014916331, createdName=amyloid, createdTime=Tue Feb 09 21:51:15 CST 2021, time=2021-02-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1617599, encodeId=c204161e599eb, content=<a href='/topic/show?id=9619e4148ef' target=_blank style='color:#2F92EE;'>#神经丝轻链蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74148, encryptionId=9619e4148ef, topicName=神经丝轻链蛋白)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=8dec19785391, createdName=HinsMax, createdTime=Tue Feb 09 21:51:15 CST 2021, time=2021-02-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1048721, encodeId=ac6c1048e2122, content=老年人痴呆何药可用??, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=junJUN, createdTime=Mon Feb 08 09:51:15 CST 2021, time=2021-02-08, status=1, ipAttribution=)]
    2021-02-09 amyloid
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    2021-02-08 junJUN

    老年人痴呆何药可用??

    0

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