临床表现 临床表现
Natalie S Ryan1,2, Clíona Farrell1,3, Moneeb Nasir1,2
1UK Dementia Research Institute at UCL, London, United Kingdom.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
自体主导性阿尔茨海默病 (ADAD) 呈现出多种类型的粉样蛋白β病理和脑粉样蛋白血管病变 (CAA) 严重程度. 莱卡尼马布-BS与斑块和CAA结合,结合度增加与更严重的CAA相关.
科学领域:
- 神经病理学神经病理学
- 神经退行性疾病 神经退行性疾病
- 遗传学 是一个遗传学.
背景情况:
- 自体主导性阿尔茨海默病 (ADAD) 与APP,PSEN1和PSEN2中的突变有关,这些突变影响了粉样蛋白β的处理,导致斑块和脑粉样蛋白血管病变 (CAA) 沉积.
- 突变的变化影响了粉样β异型,斑块/CAA类型和严重程度以及临床表现.
- 在抗粉胺β免疫疗法期间,CAA是粉胺相关成像异常 (ARIA) 的危险因素.
研究的目的:
- 为了研究ADAD的神经病理异质性.
- 探索遗传突变,临床表型和粉样β沉积之间的关系,包括CAA.
- 评估lecanemab生物类似抗体 (lecanemab-BS) 与ADAD中的粉样β斑块和CAA的结合.
主要方法:
- 来自50名ADAD个体的死后大脑捐赠 (37个PSEN1,13个APP突变).
- 用泛胺β和莱卡尼马布-BS抗体进行免疫组织化学染色.
- 评估CAA的频率和严重程度在leptomeninges和帕伦基马.
- 对于粉样β异型和lecanemab-BS.的免疫光共染.
- 与临床数据和体内MRI (SWI) 的相关性在10例中.
主要成果:
- 在PSEN1中,非amnestic和非典型的临床特征比APP突变更常见.
- 所有病例都显示出末期的AD病理,CAA的频率和严重程度各不相同.
- 莱卡尼马布-BS与粉样β斑块和CAA结合;在严重的CAA病例中,结合更广泛.
- 在SWI MRI上观察到4/10个人的微血,所有人都有中度至重度的CAA,但在5/10没有微血的人中也存在.
结论:
- 莱卡尼马布-BS在各种ADAD突变和临床表现中有效地与粉样β斑块和CAA结合.
- 严重CAA的大脑血管中lecanemab-BS结合的增加强调了对体内CAA生物标志物的需求.
- 这些发现支持ADAD的早期治疗干预,并强调了解治疗反应中的CAA的重要性.
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