中国神经再生研究(英文版) ›› 2026, Vol. 21 ›› Issue (9): 4331-4341.doi: 10.4103/NRR.NRR-D-25-00705

• 综述:脑损伤修复保护与再生 • 上一篇    下一篇

线粒体自噬减轻蛛网膜下腔出血后神经元损伤:自噬靶向嵌合体4的作用

  

  • 出版日期:2026-09-15 发布日期:2026-05-21
  • 基金资助:
    国家自然科学基金(82071309)、黑龙江省重点研发计划项目(2022ZX06C03)、哈尔滨医科大学研究生科研与实践创新项目(YJSCX2023-62HYD)、哈尔滨医科大学第一附属医院科技创新基金(2025M09)、黑龙江省自然科学基金杰出青年项目(YQ2023H008)、中国博士后科学基金一般项目(2021MD703829)、黑龙江省博士后科学基金项目一般项目(LBH-Z20169)、哈尔滨医科大学第一附属医院青年人才计划(2021Y10)、黑龙江省自然科学基金项目(PL2024H055)

Mitophagy alleviates neuronal damage after subarachnoid hemorrhage: Role of autophagy-targeting chimera 4

Yongzhi Zhang1, Jianqiao Li1, Qi Sun1, Peichun Zhou2, Pei Wu1, Zhiyong Ji1, *, Yuchen Li1, *, Huaizhang Shi1, *   

  1. 1Department of Neurosurgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China; 
    2Harbin Medical University, Harbin, Heilongjiang Province, China
  • Online:2026-09-15 Published:2026-05-21
  • Contact: Huaizhang Shi, PhD, huaizhangshi@163.com; Yuchen Li, PhD, liyuchen8999@163.com; Zhiyong Ji, PhD, jizhiyong1980@163.com.
  • Supported by:
    This work was supported by the National Natural Science Foundation of China, No. 82071309 (to HS); the Key Research and Development Plan Project of Heilongjiang Province, No. 2022ZX06C03 (to HS); the Postgraduate Research & Practice Innovation Program of Harbin Medical University, No. YJSCX2023-62HYD (to YZ); the Scientific Innovation Foundation of the First Affiliated Hospital of Harbin Medical University, No. 2025M09 (to ZJ); the Outstanding Youth Project of the Natural Science Foundation of Heilongjiang Province, No. YQ2023H008 (to YL); the General Project of the China Postdoctoral Science Foundation Project, No. 2021MD703829 (to YL); the General Project of the Heilongjiang Provincial Postdoctoral Science Foundation Project, No. LBH-Z20169 (to YL); the Young Talents Program of the First Affiliated Hospital of Harbin Medical University, No. 2021Y10 (to YL); and the Natural Science Foundation of Heilongjiang Province, No. PL2024H055 (to PW).

摘要:

实验旨在观察自噬靶向嵌合体4(新型线粒体靶向自噬激活因子)在蛛网膜下腔出血模型中的作用。结果显示,在体外线粒体损伤模型中,自噬靶向嵌合体4逆转了碳酰氰基-3-氯苯肼诱导的线粒体膜电位崩溃,并激活了线粒体自噬。在体外蛛网膜下腔出血模型中,自噬靶向嵌合体4在急性期改善了神经元增殖和迁移能力,减少了蛛网膜下腔出血后神经元凋亡。在体内蛛网膜下腔出血模型中,自噬靶向嵌合体4在急性期减少了神经元凋亡改善了神经功能,最终减少了长期神经元损失。此外,蛛网膜下腔出血后急性期Rnf144B表达显著上调时与不良预后相关,而自噬靶向嵌合体4可显著抑制Rnf144B表达,从而激活线粒体自噬并减少神经元凋亡。实验结果数据进一步表明,线粒体自噬标志蛋白Parkin在蛛网膜下腔出血后急性期未能发挥充分的神经保护作用,可能受到Rnf144B的抑制,进一步抑制Parkin表达并未干扰自噬靶向嵌合体4的作用。上述结果不仅证实了自噬靶向嵌合体4通过靶向线粒体自噬在蛛网膜下腔出血后发挥神经保护作用,还发现了Rnf144B与Parkin之间的竞争性抑制,导致蛛网膜下腔出血后急性期预后不良。


http://orcid.org/0000-0003-3150-6234 (Huaizhang Shi); 
http://orcid.org/0000-0001-9879-1207 (Yuchen Li); 
http://orcid.org/0000-0002-1855-4197 (Zhiyong Ji)

关键词: 凋亡, 自噬, 脑损伤, 线粒体膜电位, 线粒体, 线粒体自噬, 神经元, 脑卒中, 蛛网膜下腔出血, 泛素

Abstract: This study investigated the role of autophagy-targeting chimera 4, a novel activator of autophagy that targets mitochondria, in a subarachnoid hemorrhage model. The data demonstrated that in an in vitro mitochondrial damage model, autophagy-targeting chimera 4 reversed carbonyl cyanide 3-chlorophenylhydrazone-induced mitochondrial membrane potential collapse and activated mitophagy. In the in vitro subarachnoid hemorrhage model, autophagy-targeting chimera 4 improved neuronal proliferation and migration during the acute phase and reduced neuronal apoptosis after subarachnoid hemorrhage. In the in vivo subarachnoid hemorrhage model, autophagy-targeting chimera 4 also decreased neuronal apoptosis during the acute phase, improved neurological function, and ultimately reduced long-term neuronal loss. Additionally, increased ring finger protein 144B expression after subarachnoid hemorrhage was associated with poor prognosis, and autophagy-targeting chimera 4 significantly inhibited ring finger protein 144B expression, thereby activating mitophagy and reducing neuronal apoptosis. The results also showed that the mitophagic marker parkin did not exert protective effects during the acute phase after subarachnoid hemorrhage and might be inhibited by ring finger protein 144B. Moreover, parkin inhibition did not interfere with the mitophagic or apoptotic effects of autophagy-targeting chimera 4. These findings not only confirm that autophagy-targeting chimera 4 exerts neuroprotective effects by targeting mitophagy after subarachnoid hemorrhage, but also demonstrate competitive inhibition between ring finger protein 144B and parkin, leading to poor prognosis in the acute phase after subarachnoid hemorrhage.

Key words: apoptosis, autophagy, brain injury, mitochondrial membrane potential, mitochondrion, mitophagy, neurons, stroke, subarachnoid hemorrhage, ubiquitin