时间标签：数据日期 2026-11-05 · 生成时间 2026-11-05 05:30（Asia/Shanghai）｜ 检索窗口 PubMed edat 2026/11/02 – 2026/11/06 ｜ 情报发生日期 2026-11-05
研究问题
The outcome depends on whether fission selectively isolates irreversibly damaged domains while the remaining network retains sufficient fusion and respiratory capacity.During early stress, fission can partition damaged regions into removable units (25).；Direct evidence that mitochondrial removal persistently exceeds replacement in immune cells remains limited.The key variable is not mitophagy activity alone, but whether functional replacement matches mitochondrial removal (22).；These changes may stabilize low-response programs, but their precise connection to mitochondrial quality-control failure in human sepsis remains unclear (133).The resulting circuit is bidirectional.
方法
This definition captures the severity of the syndrome, but it does not explain why patients with similar hemodynamic disturbances and organ-failure scores show markedly different biological courses.；Some patients recover after a relatively transient period of metabolic and immune suppression, whereas others develop persistent defects in antigen presentation and antimicrobial defense that are associated with increased susceptibility to secondary infections (2).；We define the loss of this coordination as mitochondrial quality-control uncoupling.This idea helps resolve a central contradiction in sepsis biology.
核心结论
Static evidence of pathway activation therefore indicates attempted clearance, whereas time-resolved reporter measurements combined with lysosomal-function and cargo-turnover assays are needed to demonstrate elimination of oxidant-producing mitochondria (18, 43).5.2Depletion-dominant uncoupling: removal exceeds functional replacementDepletion-dominant uncoupling cannot be inferred from fragmentation alone.；These findings link impaired autophagic and phagolysosomal handling to immune dysfunction but do not directly demonstrate that mitochondrial cargo congests lysosomes.A terminal bottleneck removes mitochondria from the functional network while damaged cargo or mitophagosomes persist.；These observations support insufficient clearance in specific contexts but do not establish a single dominant state across tissues or phases.5.5What experimental sepsis studies currently supportTaken together, the clearest direct support for an accumulation-dominant interpretation comes from LPS-exposed skeletal muscle, where mito-QC showed no compensatory increase in mitolysosomes despite mitochondrial abnormalities (77).
局限
Removing a partially functional mitochondrion, however, may worsen energetic failure if replacement is delayed (11).Box 2Major mitophagy-recognition routes and activation logic.Mitophagy can be initiated through ubiquitin-dependent recognition or by mitochondrial receptors.；However, neither study measured lysosomal occupancy or cargo export, and the PICK1 study did not identify retained cargo as mitochondrial; they therefore support failed autophagic completion, not mitochondrial-cargo-specific congestion.Conceptually, lysosomal congestion could explain how reduced mitochondrial mass coexists with damaged organelles and why increased mitophagy initiation may worsen dysfunction when lysosomal completion is limiting (43).
对本项目的价值
中高价值：属「营养感知—自噬—蛋白稳态轴」方向；mTOR / 自噬 / 蛋白质稳态栏目可用作本项目文献库与综述素材。 ｜ 价值分 3.1/5（★★★☆☆）
全文来源
PubMed PMC JATS（正文 57,739 字符，题名指纹 1.0，已过 PubMed PMCID 官方关联 + 题名指纹 + 正文长度归属校验）
原文题录
- 中文题名：脓毒症中的线粒体质量控制解耦：持续性免疫低反应性的缺失环节
- 英文标题：Mitochondrial quality-control uncoupling in sepsis: a missing link to persistent immune hyporesponsiveness.
- 期刊与标识：Frontiers in immunology · PMID 42979398 · DOI 10.3389/fimmu.2026.1982407 · PMC PMC13729378