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Brain:tau蛋白早期阶段及其与大脑功能连接、萎缩和记忆的关系

2021-10-24 MedSci原创 MedSci原创

Tau病理与认知密切相关,特别是与阿尔茨海默病(AD)的记忆表现密切相关。

Tau病理与认知密切相关,特别是与阿尔茨海默病(AD)的记忆表现密切相关。关于记忆功能结构的研究已经确定了两个主要的皮质记忆网络,它们与海马体高度相连,并不同程度地参与了表象记忆--前颞部系统和后内侧系统。

虽然早期淀粉样蛋白-β(Aβ)的沉积发生在后中轴系统的区域,神经纤维缠结的积累早期发生在前颞叶内侧(MTL)亚区。具体来说,神经纤维缠结首先出现在跨颞区,这是颞叶内的一个亚区,主要与Brodmann35区重叠,也出现在颞叶皮质。

近期,来自瑞典隆德大学马尔默临床科学系临床记忆研究室的专家使用tau-PET成像来研究人类内侧颞叶内tau病理学进展的顺序,以及后内侧系统的各个区域,旨在研究内侧颞叶tau与功能连接、区域萎缩和记忆表现的关系。

该研究作为瑞典BioFINDER-2研究的一部分,纳入了215名Aβ-认知无障碍者、81名Aβ+认知无障碍者和87名Aβ+轻度认知障碍者,他们各自接受了18F-RO948 tau和18F-flutemetamol淀粉样蛋白PET成像、结构T1-MRI和记忆评估。

基于事件的建模显示,内丘皮层和Brodmann35区显示出最早的tau积累的迹象,其次是海马的前部和后部、Brodmann36区和海马旁皮层。在后期,tau在新皮质颞部和最后顶叶脑区异常积累。其次,在认知能力无障碍的人中,tau负荷的增加与内侧皮层、Brodmann35区和前海马的局部萎缩有关,前内侧颞叶亚区的tau负荷与后海马的远端萎缩有关。这些区域的Tau负荷,但不是萎缩,与较低的记忆表现有关。

非痴呆老年人的生物标志物异常序列

此外,内侧颞叶和中后部系统区域之间的关键网络中与tau相关的功能连接的减少与这种早期记忆障碍有关。最后,在轻度认知障碍患者中,海马中的tau负荷与记忆表现的关联部分是由海马后部萎缩介导的。

总之,该研究结果强调了tau病理学在内侧颞叶的进展及其与记忆表现的疾病阶段性关联。

 

参考文献:

Early stages of tau pathology and its associations with functional connectivity, atrophy and memory, Brain, Volume 144, Issue 9, September 2021, Pages 2771–2783, https://doi.org/10.1093/brain/awab114

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    2022-09-02 chendoc252
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    2021-10-26 hb2008ye
  6. [GetPortalCommentsPageByObjectIdResponse(id=1696006, encodeId=bd8e169600604, content=<a href='/topic/show?id=03b98809697' target=_blank style='color:#2F92EE;'>#萎缩#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88096, encryptionId=03b98809697, topicName=萎缩)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=53fc29868494, createdName=chendoc252, createdTime=Fri Sep 02 06:07:22 CST 2022, time=2022-09-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1903599, encodeId=6cd519035992c, content=<a href='/topic/show?id=d386438e55a' target=_blank style='color:#2F92EE;'>#大脑功能#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=107, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=43875, encryptionId=d386438e55a, topicName=大脑功能)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1376173, createdName=linagood, createdTime=Thu May 12 00:07:22 CST 2022, time=2022-05-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1442464, encodeId=0cd01442464e6, content=<a href='/topic/show?id=dfae84e3003' target=_blank style='color:#2F92EE;'>#脑功能#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84730, encryptionId=dfae84e3003, topicName=脑功能)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=00224929300, createdName=ms1467340776200723, createdTime=Tue Oct 26 09:07:22 CST 2021, time=2021-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1445789, encodeId=a0b31445e89a2, content=<a href='/topic/show?id=a343329413c' target=_blank style='color:#2F92EE;'>#功能连接#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=32941, encryptionId=a343329413c, topicName=功能连接)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJciayulicXZn6VO5hXfUv98oceXTHpMayS6T4PrSPsgsN6Jt2kCyAo9tAQwf1jCiaw4y8lxZFBA5nJg/132, createdBy=5ddb5182578, createdName=showtest, createdTime=Tue Oct 26 09:07:22 CST 2021, time=2021-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1509341, encodeId=7cd115093416f, content=<a href='/topic/show?id=19791e14471' target=_blank style='color:#2F92EE;'>#Tau#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=89, 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 Oct 26 09:07:22 CST 2021, time=2021-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1063889, encodeId=381e1063889e0, content=学到了,谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=125, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=408d5641426, createdName=ms7000000492605417, createdTime=Mon Oct 25 21:16:28 CST 2021, time=2021-10-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1063651, encodeId=4fee10636519e, content=胸椎后伸和侧屈和腰椎前凸曲线增加以及, beContent=null, objectType=article, channel=null, level=null, likeNumber=168, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTIrrxxDxnLic8t6EAs38Qfwo6H2h6JMleIgb9OSYf6LMnVDkQEqUXWoSDWboibjhOBI9SJDTXweqQIA/132, createdBy=50aa5321359, createdName=查查佳佳, createdTime=Mon Oct 25 07:08:27 CST 2021, time=2021-10-25, status=1, ipAttribution=)]
    2021-10-25 ms7000000492605417

    学到了,谢谢

    0

  7. [GetPortalCommentsPageByObjectIdResponse(id=1696006, encodeId=bd8e169600604, content=<a href='/topic/show?id=03b98809697' target=_blank style='color:#2F92EE;'>#萎缩#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88096, encryptionId=03b98809697, topicName=萎缩)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=53fc29868494, createdName=chendoc252, createdTime=Fri Sep 02 06:07:22 CST 2022, time=2022-09-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1903599, encodeId=6cd519035992c, content=<a href='/topic/show?id=d386438e55a' target=_blank style='color:#2F92EE;'>#大脑功能#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=107, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=43875, encryptionId=d386438e55a, topicName=大脑功能)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1376173, createdName=linagood, createdTime=Thu May 12 00:07:22 CST 2022, time=2022-05-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1442464, encodeId=0cd01442464e6, content=<a href='/topic/show?id=dfae84e3003' target=_blank style='color:#2F92EE;'>#脑功能#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84730, encryptionId=dfae84e3003, topicName=脑功能)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=00224929300, createdName=ms1467340776200723, createdTime=Tue Oct 26 09:07:22 CST 2021, time=2021-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1445789, encodeId=a0b31445e89a2, content=<a href='/topic/show?id=a343329413c' target=_blank style='color:#2F92EE;'>#功能连接#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=32941, encryptionId=a343329413c, topicName=功能连接)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJciayulicXZn6VO5hXfUv98oceXTHpMayS6T4PrSPsgsN6Jt2kCyAo9tAQwf1jCiaw4y8lxZFBA5nJg/132, createdBy=5ddb5182578, createdName=showtest, createdTime=Tue Oct 26 09:07:22 CST 2021, time=2021-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1509341, encodeId=7cd115093416f, content=<a href='/topic/show?id=19791e14471' target=_blank style='color:#2F92EE;'>#Tau#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=89, 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 Oct 26 09:07:22 CST 2021, time=2021-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1063889, encodeId=381e1063889e0, content=学到了,谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=125, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=408d5641426, createdName=ms7000000492605417, createdTime=Mon Oct 25 21:16:28 CST 2021, time=2021-10-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1063651, encodeId=4fee10636519e, content=胸椎后伸和侧屈和腰椎前凸曲线增加以及, beContent=null, objectType=article, channel=null, level=null, likeNumber=168, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTIrrxxDxnLic8t6EAs38Qfwo6H2h6JMleIgb9OSYf6LMnVDkQEqUXWoSDWboibjhOBI9SJDTXweqQIA/132, createdBy=50aa5321359, createdName=查查佳佳, createdTime=Mon Oct 25 07:08:27 CST 2021, time=2021-10-25, status=1, ipAttribution=)]
    2021-10-25 查查佳佳

    胸椎后伸和侧屈和腰椎前凸曲线增加以及

    0

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JAMA子刊:不需要腰穿,血浆GFAP在诊断早期老年痴呆方面可能更敏感!

血浆GFAP是检测和跟踪反应性星形胶质细胞病变和Aβ病理的敏感生物标志物,即使在AD早期阶段的个体中也是如此。

Lancet:抗抑郁药米氮平治疗痴呆患者激进行为的效果研究

痴呆症是我们这个时代最常见和最严重的公共卫生问题之一。

拓展阅读

Tau研究2024,由AD到糖尿病;靶向免疫疗法正在推进到临床

Tau研究领域正在不断扩展,涵盖了从基础分子机制到临床治疗的各个方面,尤其是精准治疗、早期诊断和免疫疗法的创新研究为未来治疗Tau相关疾病提供了新的希望。

Molecular Neurodegeneration:皮肤tau种子活性作为神经退行性疾病诊断标志物的研究进展

皮肤中错误折叠tau的种子活性可作为tau病的潜在诊断生物标志物,具有重要的临床应用价值。

Molecular Neurodegeneration:阿尔茨海默病患者肝素富集的血浆蛋白质组显著改变

阿尔茨海默病患者血浆中肝素结合蛋白显著升高,尤其是与脑中Aβ沉积相关的基质模块蛋白。结合这些血浆蛋白标志物显著提高了AD患者的分类性能,为未来AD的诊断和早期检测提供了新思路。

Stroke:血浆脑源性 tau 在大血管闭塞缺血性脑卒中预后中的应用

入院血浆脑源性-Tau 准确预测了成功 EVT 后大血管闭塞急性缺血性中风患者 90 天的功能结果。

Radiology:基于MRI的阿尔茨海默病谱系中淀粉样蛋白、Tau蛋白和神经退行性变生物标志物状态的深度学习评估

最新研究显示,深度学习技术可以检测MRI数据中的复杂模式,并具有无创表征ATN状态的潜力,已应用于临床多项研究中。

Nature子刊:脑皮质微结构与脑脊液淀粉样蛋白和 pTau 的关系

与标准皮层厚度相比,对早期注意力缺失症发病机制和微结构损伤敏感的 dMRI 指标可能更能衡量细微的神经退行性变,并有助于阐明认知能力下降的内在机制。

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