JAMA:粉样蛋白(A)、tau蛋白(T)和神经变性生物标志物与记忆下降

2019-06-19 MedSci MedSci原创

研究认为,对于基线无痴呆的老年人中,淀粉样PET、tau PET和MRI皮质厚度综合应用在预测记忆衰退方面极具统计学意义

目前,阿尔茨海默病相关的生物标记包括淀粉样蛋白(A)、tau蛋白(T)和神经变性生物标志物(N)。近日研究人员考察了60岁或60岁以上无痴呆的人群中AT(N)生物标志物谱与记忆力下降之间的关系。

480例老年参与者,参与者接受临床评价和淀粉样蛋白正电子发射断层扫描(PET-A)、TAUPET(T)和磁共振成像(MRI)皮质厚度(N)测量,结果包括A、T或N都可以是异常(+)或正常(+),总计8个亚组。研究的主要结局是15个月为间隔纵向复合记忆评分。

平均随访4.8年,44%为女性(211/480)。年龄范围从A-T-(N)-组的67岁到A+T+(N)+组的83岁。在受试者中,92%(441/480)认知功能未受损,但A+T+(N)+组轻度认知功能受损的比例最大(30%)。与其他5个AT(N)组相比,A+T+(N)+、A+T+(N)-和A+T-(N)+组的记忆下降最快。对于85岁的APOEε4非携带者,记忆下降率z评分分别为每年-0.13、-0.10及-0.10。

研究认为,对于基线无痴呆的老年人中,淀粉样PET、tau PET和MRI皮质厚度综合应用在预测记忆衰退方面极具统计学意义。

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    2019-06-21 huangdf
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    2019-06-21 szhvet
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