数据日期 2026-10-29 · 生成时间 2026-10-29 06:03
研究问题
Alzheimer's disease (AD) is characterized by the accumulation of amyloid beta (Aβ) and tau pathology, with tau pathology being more closely linked to the emergence of dementia symptoms.
方法
20 The sample comprised 202 cognitively unimpaired (CU) participants, 162 participants with mild cognitive impairment (MCI), and 77 participants with AD dementia.；Interpretation: Our findings demonstrate that genetic risk variants, which cluster primarily on genes involved in vesicular trafficking and endosomal transport, modulate amyloid‐related regional fibrillar tau: individuals with higher transport polygenic risk scores showed higher levels and higher rates of tau positron emission tomography increases during amyloid accumulation as measured by time since becoming first amyloid positive.
核心结论
Regression lines and 95% CI (shaded areas) are presented for binarized groups defined by pPRS < 25th percentile (blue, “Low pPRS”) and > 75th percentile (red, “High pPRS”). ‖ 结论：We provide genetic evidence, most robust in a well‐powered discovery cohort and directionally consistent in an independent cohort, implicating intracellular transport pathways in tau accumulation in AD.
局限
A further limitation concerns the granularity of our pathway definitions.；Resolving pathway clusters into narrower, adequately powered subcomponents is a direction for future work in larger cohorts.；A4's exclusively CU composition and comparable‐to‐higher amyloid PET burden relative to ADNI further raises the possibility that cognitive resilience or unmeasured factors such as vascular burden and co‐pathology differ between cohorts and differentially influence the amyloid–tau relationship, a residual contribution of such unmeasured factors cannot be fully excluded, 65 and future work incorporating vascular imaging and co‐pathology biomarkers would help clarify this.
对本项目的价值
★★★★★ 脑老化是最大未满足需求，也是终点最难量化的领域；biomarker 与认知读数选择最敏感。顶刊证据；队列：ADNI、GTEx；最大样本量约 3,465；设计 系统综述、观察性。
全文来源
PMC JATS 全文（正文 56,130 字符，已过标题/DOI 逐字归属校验）
原文题录
- 英文标题：Pathway-specific polygenic risk scores modify the association between amyloid and tau PET accumulation in patients with Alzheimer's disease.
- 期刊与标识：Alzheimers Dement · PMID 42936906 · DOI 10.1002/alz.71939**
A 级证据分级：A 级（同行评议人体研究）
本文属人体研究证据，但需注意：观察性或小样本干预的结论不等于已证实临床获益；效应量与长期安全性仍需更大规模、更长随访的试验验证。
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