数据日期 2026-10-29 · 生成时间 2026-10-29 06:03
证据级别：摘要级。本条依据 PubMed 结构化摘要与元数据撰写，付费墙全文未获取、未逐节核验，本站未做任何数值推算补全。
研究问题
The selective loss of dopaminergic neurons in the substantia nigra pars compacta is a defining feature of Parkinson's disease (PD), yet its underlying mechanisms remain unclear.
方法
NUS1, which encodes neurite outgrowth inhibitor-B receptor (NgBR), was recently identified as a PD risk gene.
核心结论
Here we show that NgBR is highly expressed in microglia, where its deficiency drives progressive PD-like motor deficits and dopaminergic neurodegeneration via the LCN2-SLC22A17 iron-transport axis in mice.；NgBR deficiency in mouse and human microglia triggers endoplasmic reticulum stress and PERK-ATF4-NUPR1 signaling, which preferentially induces LCN2-mediated iron efflux over cytokine release.；Subsequently, microglia-derived iron-loaded Holo-LCN2, but not iron-free Apo-LCN2, is internalized by SLC22A17, a receptor highly expressed in dopaminergic neurons, leading to iron overload and ferroptosis.；Pharmacological inhibition of LCN2-SLC22A17 axis or ferroptosis alleviated dopaminergic neuron loss and PD-like symptoms caused by microglial NgBR deficiency in vitro and in vivo. ‖ 结论：Pharmacological inhibition of LCN2-SLC22A17 axis or ferroptosis alleviated dopaminergic neuron loss and PD-like symptoms caused by microglial NgBR deficiency in vitro and in vivo.
局限
未能获取全文，具体设计细节、失访与统计学处理无法核验。
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。
原文题录
- 英文标题：Microglial NUS1 deficiency drives dopaminergic neurodegeneration through intercellular iron dysregulation in Parkinson's disease models.
- 期刊与标识：Nat Neurosci · PMID 42934350 · DOI 10.1038/s41593-026-02499-3**
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。
关于本文的文献来源：本站依据 IMA 知识库「五刊监控·深度文献卡片」（SOP §4.2 摘要级）撰写，依据期刊公开摘要与 PubMed 元数据；付费墙全文未获取之处已标注「待补全文」，未做任何数值推算补全。