中国神经再生研究(英文版) ›› 2026, Vol. 21 ›› Issue (6): 2457-2466.doi: 10.4103/NRR.NRR-D-24-01126

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

SIRT3改善老年小鼠麻醉和手术后延迟神经认知恢复:介导CypD-K166去乙酰化调节突触线粒体通透性转换孔的开放

  

  • 出版日期:2026-06-15 发布日期:2026-04-18

Mechanism of action of synaptic mitochondrial damage in delayed cognitive recovery

Huihui Miao1, #, Qiang Liu2, #, Yan-Ping Liu3, #, Bin-Bin Yan4, Xin-Hao Jiao3, Hai-Bi Wang3, Cheng-Hua Zhou4, Tianzuo Li1, Zhongcong Xie5, *, Yuqing Wu3, *   

  1. 1Department of Anesthesiology, Beijing Shijitan Hospital, Capital Medical University, Beijing, China; 
    2Department of Anesthesiology and Perioperative Medicine, Shanghai Fourth People’s Hospital, School of Medicine, Tongji University, Shanghai, China; 
    3Jiangsu Province Key Laboratory of Anesthesiology/NMPA Key Laboratory for Research and Evaluation of Narcotic and Psychotropic Drugs, Xuzhou Medical University, Xuzhou, Jiangsu Province, China; 
    4Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu Province, China; 
    5Department of Anaesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA 
  • Online:2026-06-15 Published:2026-04-18
  • Contact: Yuqing Wu, PhD, yuqingwu1973@163.com; Zhongcong Xie, PhD, zxie@mgh.harvard.edu.
  • Supported by:
    This study was supported by the National Natural Science Foundation of China, Nos. 81701040 (to HM), 82071180 (to HM), 82271206 (to TL), 82171191 (to YW), 82371211 (to YW); the Natural Science Foundation of Beijing, No. 7212023 (to HM); and Key Subject of the Natural Science Foundation of Jiangsu Province for Colleges and Universities, No. 23KJA320009 (to YW).

摘要:

麻醉和手术后神经认知恢复延迟是老年患者常见的并发症。突触是认知功能的基础,其活性在很大程度上依赖于突触线粒体的能量供应,但是突触线粒体很容易受氧化应激因素的影响。SIRT3是一种位于线粒体基质中的组蛋白去乙酰化酶,其在调节线粒体功能方面起着重要的作用。然而,SIRT3是否以及如何参与延迟神经认知恢复的发展仍不可知。因此,实验探索了突触中SIRT3在神经认知恢复延迟发展中的潜在作用。结果发现,麻醉和手术可诱导小鼠认知障碍,并减少SIRT3蛋白表达。而SIRT3过表达通过减少CypD和认知障碍上K166的乙酰化来阻碍线粒体膜通透性转运孔的开放。携带CypD-K166R突变的老年小鼠表现出显著降低的认知障碍。同样,施用线粒体膜通透性转运孔阻断剂环孢菌素A同样可以有效减轻老年小鼠因麻醉和手术引起的突触线粒体功能下降和认知障碍。结果表明,海马内突触线粒体SIRT3/CepD-K166/mPTP信号通路参与了老年小鼠的延迟神经认知恢复,因而可作为其治疗的潜在靶点。


https://orcid.org/0009-0008-4280-6586 (Yuqing Wu)

关键词: SIRT3, CypD, 乙酰化酶, 线粒体膜通透性转运孔, 延迟神经认知恢复, 老年小鼠, 海马, 突触线粒体, 突触体, 长时程增强

Abstract: Delayed neurocognitive recovery following anesthesia and surgery is a common complication in older adult patients. Synapses are fundamental to cognitive function. The activity of synapses heavily depends on the energy supplied by synaptic mitochondria, which are significantly influenced by oxidative stress. Sirtuin 3 is a histone deacetylase located in the mitochondrial matrix that plays a pivotal role in regulating mitochondrial function. However, it remains unclear whether and how sirtuin 3 is involved in the development of delayed cognitive recovery. Therefore, in this study, we investigated the potential role of sirtuin 3 in synapses during delayed neurocognitive recovery. Our results showed that anesthesia and surgery induced cognitive impairment in mice and reduced sirtuin 3 protein expression. Overexpression of sirtuin 3 inhibited opening of the mitochondrial permeability transition pore by reducing acetylation of K166 on cyclophilin D and also rescued cognitive impairment. Aged mice carrying the cyclophilin D-K166R mutation exhibited significantly reduced cognitive impairment. Similarly, administering the mitochondrial permeability transition pore blocker, cyclosporine A, effectively alleviated the decline in synaptic mitochondrial function and cognitive impairment caused by anesthesia and surgery in aged mice. These results indicate that the sirtuin 3/cyclophilin D-K166/mPTP signaling pathway in hippocampal synaptic mitochondria is involved in delayed neurocognitive recovery of aged mice, suggesting this pathway could serve as a potential target for treatment. 

Key words: acetylase, aged mice, cyclophilin D, delayed neurocognitive recovery, hippocampus, long-term potentiation, mitochondrial permeability transition pore, sirtuin 3, synaptic mitochondria, synaptosome