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α-Synuclein aggregates induce mitochondrial damage and trigger innate immunity to drive neuron–microglia communication

📅 2026-05-15 | 📰 Nature Communications | DOI: 10.1038/s41467-026-73136-7
👥 Chakraborty R, Maya S, Testa V, Montero-Muñoz J, Nonaka T, Hasegawa M, et al.
🏷️ #帕金森病 #α-synuclein #线粒体损伤 #cGAS-STING #TNT #小胶质细胞 #神经炎症

⭐ Claude AI 综合评估 · 总分 41/50

逻辑完整性
8/10
Gain+loss of function验证
方法学水平
9/10
iPSC神经元、活细胞成像、CLEM
创新性
8/10
α-Syn→线粒体→TNT新机制
可借鉴性
9/10
线粒体损伤-cGAS-STING-细胞骨架重塑
临床转化
7/10
Synucleinopathy治疗靶点

🔗 与博一课题的交叉价值

用户课题：Warburg乳酸 → PCAF-RhoA乳酸化 → 拮抗mitoxyperiosis

Figure 1 | α-Syn aggregates induce mitochondrial fragmentation and dysfunction
Figure 1
alpha-Synuclein aggregates induce mitochondrial fragmentation and dysfunction in human neuronal cells. (A) Confocal microscopy showing mitochondrial morphology in SH-SY5Y cells treated with α-Syn PFFs. (B) Quantification of mitochondrial fragmentation. (C) ATP levels and mitochondrial membrane potential (ΔΨm) measurements. (D) ROS production assessed by MitoSOX staining. (E) Time-lapse imaging of mitochondrial dynamics following α-Syn aggregate exposure.
🔬 复现建议：借鉴其线粒体形态学定量分析方法（MitoTracker + confocal + fragmentation index），可应用于检测RhoA乳酸化后线粒体形态变化
Figure 2 | mtDNA release activates cGAS-STING pathway
Figure 2
α-Syn aggregates trigger mitochondrial DNA (mtDNA) release into the cytosol. (A) Immunofluorescence showing cytosolic mtDNA (dsDNA foci) co-localizing with cGAS. (B) Quantification of cytosolic mtDNA foci. (C) Western blot showing cGAS-STING pathway activation. (D) mtDNA levels in cytosolic fractions measured by qPCR. (E) STING oligomerization and translocation upon α-Syn treatment.
🔬 复现建议：胞浆mtDNA检测+cGAS-STING WB体系可直接复用于肿瘤细胞中mitoxyperiosis阻断后mtDNA释放的检测
Figure 3 | cGAS-STING-NF-κB-IRF3 innate immune signaling cascade
Figure 3
cGAS-STING-NF-κB-IRF3 signaling cascade is required for α-Syn aggregate-induced innate immune activation. (A) Phosphorylation of TBK1, IRF3, and NF-κB p65. (B) Nuclear translocation of IRF3 and NF-κB. (C) Cytokine/chemokine expression profile. (D) STING knockout abolishes the innate immune response. (E) cGAS inhibition blocks STING activation and downstream signaling.
🔬 复现建议：STING KO/KI细胞系构建、cGAS抑制剂使用策略值得参考
Figure 4 | STING-dependent actin cytoskeleton remodeling
Figure 4
STING-dependent innate immune signaling drives actin cytoskeleton remodeling. (A) Phalloidin staining showing F-actin reorganization in α-Syn-treated neurons. (B) Quantification of actin stress fibers and filopodia. (C) Time-lapse imaging of actin dynamics. (D) STING knockout or inhibition prevents actin remodeling. (E) Rho family GTPase (Rac1/Cdc42) activation assay showing STING-dependent cytoskeletal regulation.
🔬 复现建议：RhoA/Rac1/Cdc42活性检测（G-LISA或pull-down assay）方法学可复用于用户课题的RhoA激活验证
Figure 5 | cGAS-STING pathway drives tunneling nanotube (TNT) formation
Figure 5
α-Syn aggregates promote tunneling nanotube (TNT) formation via the cGAS-STING pathway. (A) Scanning electron microscopy of TNT-like structures between neurons. (B) Live-cell imaging of TNT formation dynamics. (C) Quantification of TNT numbers and length. (D) STING or IRF3 depletion reduces TNT formation. (E) Actin/TNT marker co-localization analysis.
🔬 复现建议：TNT定量方法（SEM + live-cell imaging + 结构参数测量）可作为细胞器-细胞连接研究的模板
Figure 6 | Intercellular transfer of α-Syn aggregates via TNTs
Figure 6
Intercellular transfer of α-Syn aggregates from neurons to microglia occurs via TNT-like structures. (A) Co-culture system with labeled α-Syn in neurons and labeled microglia. (B) Time-lapse confocal showing transfer of α-Syn puncta. (C) Quantification of α-Syn transfer efficiency. (D) TNT disruption (latrunculin B) blocks transfer. (E) Three-dimensional reconstruction of TNT-mediated α-Syn transfer.
🔬 复现建议：双荧光标记共培养体系，可复用于肿瘤微环境中不同细胞间信号传递的研究
Figure 7 | Transfer of damaged mitochondria to microglia and lysosomal degradation
Figure 7
Damaged mitochondria are transferred from neurons to microglia, where they undergo lysosomal degradation. (A) Labeling of neuronal mitochondria (mito-DsRed) and detection in microglia. (B) Quantification of mitochondrial transfer. (C) Microglial uptake and co-localization with LAMP1-positive lysosomes. (D) Time-lapse imaging of mitochondrial degradation in microglia. (E) Lysosomal activity measurements.
🔬 复现建议：线粒体转移+溶酶体降解追踪体系，与mitoxyperiosis中线粒体-质膜接触的研究互补
Figure 8 | Bystander inflammatory response in microglial cells
Figure 8
Neuron-to-microglia communication triggers a bystander inflammatory response in microglial cells. (A) Microglial cytokine/chemokine release upon co-culture with α-Syn-treated neurons. (B) Single-cell analysis of microglial activation markers. (C) Conditioned medium transfer experiments showing paracrine signaling. (D) Inflammatory gene expression in microglia. (E) cGAS-STING signaling in microglia receiving damaged mitochondria.
🔬 复现建议：旁分泌炎症因子检测体系可用于研究乳酸-乳酸化-免疫微环境调控
Figure 9 | Schematic model of α-Syn-induced TNT formation and intercellular communication
Figure 9
Schematic model. α-Synuclein aggregates induce mitochondrial damage, leading to mtDNA release and activation of the cGAS-STING-NF-κB-IRF3 innate immune pathway. This signaling cascade drives actin cytoskeleton remodeling and TNT formation, facilitating intercellular transfer of α-Syn aggregates and damaged mitochondria from neurons to microglia, where they undergo lysosomal degradation and trigger a bystander inflammatory response.
🔬 复现建议：机制模式图的构建逻辑可作为用户论文中模型图的参考

📝 文章小结

本研究揭示了一条全新的α-Synuclein聚集体驱动神经炎症的分子通路： α-Syn聚集体 → 线粒体损伤 → mtDNA胞浆释放 → cGAS-STING-NF-κB-IRF3激活 → 肌动蛋白骨架重塑 → TNT形成 → α-Syn和损伤线粒体从神经元向小胶质细胞传递 → 溶酶体降解 → 旁观者炎症反应。

核心亮点： （1）首次阐明α-Syn聚集体通过线粒体损伤-cGAS-STING轴驱动TNT形成的完整机制； （2）发现损伤线粒体可经TNT从神经元转移至小胶质细胞； （3）建立iPSC-derived人源神经元-小胶质细胞共培养体系； （4）为Synucleinopathies提供cGAS-STING和TNT作为潜在治疗靶点。

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PMID: 42140967 | Nature Communications (2026) | IF: 16.6