Alz Res Therapy:基因风险评分,和血液磷酸化tau蛋白息息相关

2021-11-08 Freeman MedSci原创

包括APOE在内的AD多基因风险与血浆p-tau181有关,与诊断和Aβ病理状态无关

阿尔茨海默病(AD)的神经病理学特征是由淀粉样β(Aβ)蛋白聚集成斑块和tau蛋白的过度磷酸化与神经纤维缠结的形成所决定的。检测这些过程对于疾病的诊断和临床试验的招募至关重要。

脑脊液(CSF)和正电子发射断层扫描(PET)生物标志物的出现对该领域的临床和研究工作非常重要。然而,测量这些生物标志物的方法有一些缺点,因为它们是侵入性的、耗时的和昂贵的;可能有副作用;而且可用性有限。

因此,非常需要更容易获得的生物标志物,如在血浆中测量的标志物。最近的研究表明,血浆磷酸化tau181(p-tau181)可能是诊断AD和预后的一个有用的生物标志物。它与tau PET和CSF p-tau181一样准确地识别AD,并与无认知障碍(CU)者和轻度认知障碍(MCI)者的AD痴呆发展有关,也与引起家族性AD的突变携带者有关。此外,经尸检确认,血浆p-tau181可以准确地区分AD和非AD的神经退行性疾病。然而,血浆p-tau181和散发性AD的遗传风险之间的关系还没有被调查。


AD的遗传风险通常是通过使用多基因风险评分(PRSs)来研究的,它允许根据通过基因组广泛关联研究(GWASs)确定的几个遗传变体来计算遗传风险。AD的PRSs已被证明可以预测临床诊断、病理确诊、认知下降、疾病进展和成像生物标志物。对AD-PRS和CSF生物标志物之间关系的分析显示了一些混合的结果。最近在阿尔茨海默病神经影像学倡议(ADNI)队列中的研究报告称,在校正APOE ε4状态后,CSF t-tau和p-tau与多基因分数相关,而与CSF Aβ42的关联是由APOE ε4同型血驱动的。

有必要进一步探讨AD的遗传风险如何影响AD病理生理学的具体组成部分,即脑淀粉样变、tau病理、突触和神经元变性。由于血浆p-tau181反映了AD型tau病理学,它具有作为生物标志物的价值,以增加对PRS如何与AD的tau病理学相联系的理解,从而增加对疾病发病机制的认识。

本研究的目的是调查ADNI研究参与者的AD-PRSs(包括和不包括APOE)和血浆p-tau181之间的关系。

来自阿尔茨海默病神经影像学倡议(ADNI)的数据被用来研究AD PRS(根据最近全基因组关联研究的结果构建)和血浆p-tau181之间的关系,使用线性回归模型。对总样本(n = 818)、诊断状态分层(CU(n = 236)、MCI(n = 434)、AD痴呆(n = 148))和Aβ病理状态分层(Aβ阳性(n = 322)、Aβ阴性(n = 409))进行了分析。

在总样本中,血浆p-tau181与APOE PRS(p=3e-18-7e-15)和非APOE PRS(p=3e-4-0.03)之间存在关联。在所有诊断组(CU、MCI和AD痴呆)中,APOE PRSs与血浆p-tau181相关,而非APOE PRSs仅在MCI组有关联。

APOE PRSs在淀粉样β(Aβ)阳性和阴性个体中显示出相似的结果,而非APOE PRSs仅在Aβ阳性者中与血浆p-tau181相关(p = 0.02)。

这个研究的重要意义在于发现了:包括APOE在内的AD多基因风险与血浆p-tau181有关,与诊断和Aβ病理状态无关,而APOE以外的AD多基因风险仅在MCI和Aβ阳性者中与血浆p-tau181有关。这些结果扩展了关于AD遗传风险和p-tau181之间的知识,并进一步支持血浆p-tau181作为AD生物标志物的有用性。



原文出处:
the Alzheimer’s Disease Neuroimaging Initiative*, Zettergren A, Lord J, et al. Association between polygenic risk score of Alzheimer’s disease and plasma phosphorylated tau in individuals from the Alzheimer’s Disease Neuroimaging Initiative. Alz Res Therapy. 2021;13(1):17. doi:10.1186/s13195-020-00754-8

 

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    2021-11-08 ZYY7209

    认知障碍分子标志物路在何方?

    0

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    2021-11-08 yesaisai133

    有帮助

    0

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  7. [GetPortalCommentsPageByObjectIdResponse(id=1704517, encodeId=e0651e04517cf, content=<a href='/topic/show?id=1f5b41931ce' target=_blank style='color:#2F92EE;'>#基因风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=41931, encryptionId=1f5b41931ce, topicName=基因风险)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=医者仁心, createdTime=Wed Aug 10 16:38:40 CST 2022, time=2022-08-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1739080, encodeId=5fa81e39080bc, content=<a href='/topic/show?id=6e566913df' target=_blank style='color:#2F92EE;'>#ERA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6913, encryptionId=6e566913df, topicName=ERA)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=e36234488643, createdName=124988c7m106暂无昵称, createdTime=Thu Nov 11 21:38:40 CST 2021, time=2021-11-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1509347, encodeId=7ba8150934efd, content=<a href='/topic/show?id=19791e14471' target=_blank style='color:#2F92EE;'>#Tau#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17144, encryptionId=19791e14471, topicName=Tau)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=hb2008ye, createdTime=Tue Nov 09 21:38:40 CST 2021, time=2021-11-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1068281, encodeId=4a90106828196, content=认知障碍分子标志物路在何方?, beContent=null, objectType=article, channel=null, level=null, likeNumber=52, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7e831560211, createdName=ZYY7209, createdTime=Mon Nov 08 21:31:39 CST 2021, time=2021-11-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1068267, encodeId=b065106826efd, content=有帮助, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://cdnapi.center.medsci.cn/medsci/head/2018/08/20/54886e9842d0997b08ed3f134c538d9d.jpg, createdBy=0d1e1365885, createdName=yesaisai133, createdTime=Mon Nov 08 20:53:42 CST 2021, time=2021-11-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1068257, encodeId=8438106825e42, content=深受启发<a href='/topic/show?id=d55f104233bd' target=_blank style='color:#2F92EE;'>#梅斯医学科研互助群#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=104233, encryptionId=d55f104233bd, topicName=梅斯医学科研互助群)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c9115699431, createdName=ms3000002011741948, createdTime=Mon Nov 08 20:47:24 CST 2021, time=2021-11-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1068219, encodeId=396b1068219ac, content=已读已读已读已读已读已读已读已读已读已读已读已读已读已读已读, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f03a5433387, createdName=ms5000000518166734, createdTime=Mon Nov 08 19:47:39 CST 2021, time=2021-11-08, status=1, ipAttribution=)]
    2021-11-08 ms5000000518166734

    已读已读已读已读已读已读已读已读已读已读已读已读已读已读已读

    0

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