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JAMA子刊:临床前老年痴呆患者的皮质PET成像模式的差异性

2022-05-05 MedSci原创 MedSci原创

早期tau沉积在临床前AD期间可能遵循多种轨迹,并可能涉及几个皮质区域。

临床前阿尔茨海默病(AD)患者早期tau沉积的特征对于旨在选择有AD风险的个体并阻止疾病进展的预防试验至关重要。

为了评价在临床上无障碍的大群老年人中,β-淀粉样蛋白(A+)升高的皮质tau正电子发射断层成像(PET)异质性的流行程度,来自美国斯坦福大学的专家开展了一项横断面研究,检查了2014年4月至2017年12月无症状AD抗淀粉样蛋白治疗(A4)研究的随机化前tau PET、淀粉样蛋白PET、结构磁共振成像、人口统计和认知数据。结果发表在JAMA Neurology杂志上。

后续分析使用来自ADNI、HABS及维斯康星研究的观察性tau PET数据来评估一致性。可用的淀粉样和tau PET数据(A4研究,n = 447;ADNI,n = 433;HABS,n = 190;和威斯康星,n = 328),通过检查不对称的皮质tau信号和相对于内侧颞叶(MTL)tau的不成比例的皮质tau信号,确定具有异质皮质tau PET模式(A+T皮质+)的临床前AD患者。

结果共有447名A4参与者(A+组,392;正常β-淀粉样蛋白组,55),平均(SD)年龄为71.8(4.8)岁,包括239名女性(54%)。A+组中共有36人(占A+组的9%)表现出异质性的皮质tau模式,并被进一步分为3个亚型:左侧不对称型、楔前主导型和右侧不对称型。

A+组中共有116人(占A+组的30%)显示MTL tau升高(A+T MTL+)。A+T皮质+组的人比A+T MTL+组的人年轻(t61.867 = -2.597; P = .03)。在A+T皮质+组和A+T MTL+组中,区域tau的增加与海马体积和MTL厚度的减少有关,但与皮质厚度无关。A+T皮层+组和A+T MTL+组的记忆分数相当,而A+T皮层+组的执行功能分数比A+T MTL+组低。A+T皮层+组的患病率和A+T皮层+组内的tau模式在ADNI、HABS和Wisconsin中是一致的。

本研究表明,早期tau沉积在临床前AD期间可能遵循多种轨迹,并可能涉及几个皮质区域。

 

参考文献:

Divergent Cortical Tau Positron Emission Tomography Patterns Among Patients With Preclinical Alzheimer Disease. JAMA Neurol. Published online April 18, 2022. doi:10.1001/jamaneurol.2022.0676

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    2022-05-13 feather89
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    2022-05-04 肿瘤克星

    JAMA上文章都是顶级的,谢谢梅斯及时上新

    0

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    2022-05-04 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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