Lancet oncol:大脑β淀粉样变,是否可用于预测进展至阿尔兹海默症的风险?

2018-02-28 MedSci MedSci原创

我们需要提高对临床前阿尔兹海默症的风险因素和病程进展的标志物的了解。近日Lancet子刊上发表一篇文章,对大脑β淀粉样变和多种认知和神经影像参数随着临床前阿尔兹海默症患者认知功能下降的进展的相互关系进行了评估。该研究是在法国巴黎Salpêtrière医院开展的单中心观察性研究,招募70-85岁的主诉健忘但认知和记忆未受伤的老年人(MMSE评分≥27,临床痴呆评分0分、FCSRT总回忆分≥41分)。

我们需要提高对临床前阿尔兹海默症的风险因素和病程进展的标志物的了解。近日Lancet子刊上发表一篇文章,对大脑β淀粉样变和多种认知和神经影像参数随着临床前阿尔兹海默症患者认知功能下降的进展的相互关系进行了评估。

该研究是在法国巴黎Salpêtrière医院开展的单中心观察性研究,招募70-85岁的主诉健忘但认知和记忆未受伤的老年人(MMSE评分≥27,临床痴呆评分0分、FCSRT总回忆分≥41分)。初始时,根据受试者脑淀粉样β沉积分层(有或无)。初始时,所有受试者均接受认知、心理行为学、个性、APOEε4等位携带状态、大脑结构和功能、大脑糖代谢(18F-FDG PET)和事件相关电位(EEGs)等的评估。体动记录仪和CSF可选。每6个月进行一次临床、认知、心理行为学评估;每12个月评估一次神经生理、EEG和活动记录;每24个月进行一次MRI、18F-FDG和18F-florbetapir PET检查。研究人员对初始和24个月时β淀粉样蛋白沉积状况和检查结果的关系,并结合30个月时的临床状况进行评估。

2013年5月25日-2015年1月20日,共招募318位受试者,中位年龄76.0岁(SD 3.5)。初始MMSE平均分数是28.67(SD0.96),平均教育水平较高。88位(28%)受试者有β淀粉样变。根据年龄、性别和教育水平校准后,β淀粉样变亚群未发生任何心理行为、认知、活动记录和大脑结构和功能性变化。有β淀粉样蛋白沉积的个体更倾向携带APOEε4等位基因(33[38%] vs 29[13%],p<0.0001)。CSF的淀粉样β1-42浓度与初始时18F-florbetapir的平均摄取量(r=-0.62,p<0.0001)、淀粉样β1-42/β1-40值(r=–0.61,p<0.0001)和精准鉴定的β淀粉样蛋白沉积状况显着相关。MMSE和临床痴呆评分在有无β淀粉样蛋白沉积的受试者中没有明显差异。4位受试者(均为β样淀粉沉积阳性)出现阿尔兹海默症前期症状,其比其他β淀粉样蛋白沉积受试者年长(初始平均年龄80.2岁[SD 4.1]vs76.8岁[SD3.4]),18F-florbetapir的初始摄取量也更高(平均标准摄入比值1.46[SD0.16]vs1.02[SD0.20]),APOEε4等位基因携带率也更高(3人[75%] vs33[39%])。该4位受试者在初始时也有轻度的执行功能障碍。

单纯大脑β淀粉样变不能预测30个月内是否可进展至阿尔兹海默症前期。需要随访更长时间以确定是否存在关联。

原始出处:

Bruno Dubois,et al.Cognitive and neuroimaging features and brain β-amyloidosis in individuals at risk of Alzheimer's disease (INSIGHT-preAD): a longitudinal observational study.The Lancet Oncology. February 27,2018.https://doi.org/10.1016/S1474-4422(18)30029-2

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    2019-02-03 minlingfeng
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    2018-04-15 howi
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    2018-03-20 135****7952平儿

    学了.......

    0

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    2018-03-15 135****7952平儿

    学了.......一

    0

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    2018-02-28 虈亣靌

    学习了.谢谢分享

    0

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