Alzheimers Dementia:血液淀粉样蛋白指标,可预测长期痴呆风险

2022-03-16 Freeman MedSci原创

血液中特定的淀粉样蛋白指标,可预测长期痴呆风险

基于血液的生物标志物是阿尔茨海默病(AD)诊断、预后和预测的下一个挑战。自2007年以来,脑脊液(CSF)淀粉样β(Aβ)1-42或Aβ1-42/Aβ1-40比率、tau、磷酸化tau(p-tau)、正电子发射断层扫描(PET)淀粉样生物标志物被用作病理生理学生物标志物,与拓扑学生物标志物(临床、神经心理学和脑成像)相结合,在研究和日常临床实践中确定AD诊断。它们检测早期AD和有可能发展为AD。随着靶向药物和认知衰退前的预防策略的发展,需要验证非侵入性的、可重复的和易于使用的工具,以预先筛查有发生AD和转化为痴呆风险的对象。

最近,血浆Aβ1-42或Aβ1-42/Aβ1-40比率被发现与CSF Aβ1-42或CSF Aβ1-42/Aβ1-40比率明显相关。血浆Aβ1-42和Aβ1-42/Aβ1-40比率也可以预测PET淀粉样蛋白的阳性,在老年认知正常人和MCI及AD患者中具有良好的敏感性和特异性。然而,血浆Aβ生物标志物的预后相关性还有待充分验证。

对血浆Aβ水平的研究评估了血浆Aβ生物标志物的利益,得出了相互矛盾的结果。最后,在一些大型社区队列中发现,低血浆Aβ1-42或Aβ1-42/Aβ1-40比率与转化为痴呆症有关。然而,在其他队列中,这种关联并没有被证实。

除了Aβ1-42和Aβ40,可溶性淀粉样前体蛋白α(sAPPα)和β(sAPPβ)也是AD患者CSF中很有希望的新生物标志物30,31,最近又在血液中发现了。然而,这些结果还没有在其他研究中得到证实。已观察到sAPPα在对Aβ1-42低聚物的反应中出现短暂的增加,表明sAPPα水平可能随患者的临床分期而变化。

藉此, 法国巴黎大学的Olivier Hanon等人,在大规模纵向多中心BALTAZAR(淀粉样肽和阿尔茨海默病风险的生物标志物)队列中探究了血浆中Aβ1-42、Aβ1-40、Aβ1-42/Aβ1-40比率和sAPPα的浓度是否能预测从MCI到痴呆,尤其是AD的转化,并进行了为期3年的随访。

BALTAZAR研究的轻度认知障碍(MCI)参与者共有N = 485,这是一个大规模的纵向多中心队列,被随访了3年。其中总共有165人转为痴呆(95%为AD)。用Logistic和Cox模型分析了转换与血浆淀粉样β(Aβ)1-42、Aβ1-40、Aβ1-42/Aβ1-40比率之间的关系。

他们发现:与非转换者相比,转换者的血浆Aβ1-42水平较低(P值=0.03),Aβ1-42 /Aβ1-40比率较低(P值=0.02)

Aβ1-42 /Aβ1-40比率最高的四分位数(>0.169)的MCI参与者的转换风险明显较低(经年龄、性别、教育、脂蛋白Eε4、海马萎缩调整的危险比=0.52(95%置信区间[0.31-0.86],P值=0.01)。

该研究的重要意义在于发现了:在这个大队列的MCI受试者中,他们发现了一个血浆Aβ1-42/Aβ1-40比率的阈值,可能会发现3年内转化为痴呆的低风险患者。


原文出处:
Hanon O, Vidal J, Lehmann S, et al. Plasma amyloid beta predicts conversion to dementia in subjects with mild cognitive impairment: The BALTAZAR study. Alzheimer’s & Dementia. Published online February 20, 2022:alz.12613. doi:10.1002/alz.12613

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    2023-01-23 anminleiryan

    #ERS#

    0

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    2022-07-30 linlin2323

    #dementia#

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    2022-06-18 dingxiaobo
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    2022-03-12 pcw106
  5. [GetPortalCommentsPageByObjectIdResponse(id=1878492, encodeId=6a0a18e849240, content=<a href='/topic/show?id=c157696175' target=_blank style='color:#2F92EE;'>#ERS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=163, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6961, encryptionId=c157696175, topicName=ERS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e93e105, createdName=anminleiryan, createdTime=Mon Jan 23 21:43:55 CST 2023, time=2023-01-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1718133, encodeId=4d1b1e181336b, content=<a href='/topic/show?id=8f0658433a' target=_blank style='color:#2F92EE;'>#dementia#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=176, 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=Sat Jul 30 06:43:55 CST 2022, time=2022-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1779831, encodeId=f9301e798319d, content=<a href='/topic/show?id=51b4238909' target=_blank style='color:#2F92EE;'>#alzheimers#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=191, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2389, encryptionId=51b4238909, topicName=alzheimers)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=930e243, createdName=dingxiaobo, createdTime=Sat Jun 18 09:43:55 CST 2022, time=2022-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1316834, encodeId=5c2c131683444, content=<a href='/topic/show?id=d3d0e121576' target=_blank style='color:#2F92EE;'>#痴呆风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=169, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71215, encryptionId=d3d0e121576, topicName=痴呆风险)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a98f453, createdName=pcw106, createdTime=Sat Mar 12 12:43:55 CST 2022, time=2022-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1338553, encodeId=c94e1338553d2, content=<a href='/topic/show?id=767711566a9' target=_blank style='color:#2F92EE;'>#MERS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=205, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11566, encryptionId=767711566a9, topicName=MERS)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/71tKRib0PibveVjnEa7tPLMaCzoKicFlKSEOzRTGf4wNvDV54kJyNx1ott1D5Xp5gRu7IwUia77oN0YFdffvQMu6Ug/132, createdBy=9e302500146, createdName=ms49895894946433513521, createdTime=Sat Mar 12 12:43:55 CST 2022, time=2022-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1442905, encodeId=9aa814429050f, content=<a href='/topic/show?id=e112659308a' target=_blank style='color:#2F92EE;'>#淀粉样蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=166, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=65930, encryptionId=e112659308a, topicName=淀粉样蛋白)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c1774999170, createdName=ms7405317358118777, createdTime=Sat Mar 12 12:43:55 CST 2022, time=2022-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1246678, encodeId=5d2c12466e813, content=老年性痴呆,未来还是希望借助神经电生理吧,也许更为有效!, beContent=null, objectType=article, channel=null, level=null, likeNumber=149, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=neuro.Dr, createdTime=Fri Mar 11 00:43:55 CST 2022, time=2022-03-11, status=1, ipAttribution=)]
    2022-03-12 ms49895894946433513521

    #MERS#

    0

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  7. [GetPortalCommentsPageByObjectIdResponse(id=1878492, encodeId=6a0a18e849240, content=<a href='/topic/show?id=c157696175' target=_blank style='color:#2F92EE;'>#ERS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=163, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6961, encryptionId=c157696175, topicName=ERS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e93e105, createdName=anminleiryan, createdTime=Mon Jan 23 21:43:55 CST 2023, time=2023-01-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1718133, encodeId=4d1b1e181336b, content=<a href='/topic/show?id=8f0658433a' target=_blank style='color:#2F92EE;'>#dementia#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=176, 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=Sat Jul 30 06:43:55 CST 2022, time=2022-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1779831, encodeId=f9301e798319d, content=<a href='/topic/show?id=51b4238909' target=_blank style='color:#2F92EE;'>#alzheimers#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=191, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2389, encryptionId=51b4238909, topicName=alzheimers)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=930e243, createdName=dingxiaobo, createdTime=Sat Jun 18 09:43:55 CST 2022, time=2022-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1316834, encodeId=5c2c131683444, content=<a href='/topic/show?id=d3d0e121576' target=_blank style='color:#2F92EE;'>#痴呆风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=169, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71215, encryptionId=d3d0e121576, topicName=痴呆风险)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a98f453, createdName=pcw106, createdTime=Sat Mar 12 12:43:55 CST 2022, time=2022-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1338553, encodeId=c94e1338553d2, content=<a href='/topic/show?id=767711566a9' target=_blank style='color:#2F92EE;'>#MERS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=205, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11566, encryptionId=767711566a9, topicName=MERS)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/71tKRib0PibveVjnEa7tPLMaCzoKicFlKSEOzRTGf4wNvDV54kJyNx1ott1D5Xp5gRu7IwUia77oN0YFdffvQMu6Ug/132, createdBy=9e302500146, createdName=ms49895894946433513521, createdTime=Sat Mar 12 12:43:55 CST 2022, time=2022-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1442905, encodeId=9aa814429050f, content=<a href='/topic/show?id=e112659308a' target=_blank style='color:#2F92EE;'>#淀粉样蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=166, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=65930, encryptionId=e112659308a, topicName=淀粉样蛋白)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c1774999170, createdName=ms7405317358118777, createdTime=Sat Mar 12 12:43:55 CST 2022, time=2022-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1246678, encodeId=5d2c12466e813, content=老年性痴呆,未来还是希望借助神经电生理吧,也许更为有效!, beContent=null, objectType=article, channel=null, level=null, likeNumber=149, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=neuro.Dr, createdTime=Fri Mar 11 00:43:55 CST 2022, time=2022-03-11, status=1, ipAttribution=)]
    2022-03-11 neuro.Dr

    老年性痴呆,未来还是希望借助神经电生理吧,也许更为有效!

    0

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