中国神经再生研究(英文版) ›› 2023, Vol. 18 ›› Issue (11): 2449-2458.doi: 10.4103/1673-5374.371370

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

过表达Sirt6调节谷氨酸能神经元功能改善睡眠剥夺引起的认知障碍

  

  • 出版日期:2023-11-15 发布日期:2023-05-04
  • 基金资助:
    国家自然科学基金项目(81771160,81671060,31970973,21921004);武汉大学中南医院转化医学与跨学科研究联合基金项目(ZNJC201934)

Overexpression of Sirt6 ameliorates sleep deprivation induced-cognitive impairment by modulating glutamatergic neuron function

Jinpiao Zhu1, #, Chang Chen1, #, Zhen Li2, Xiaodong Liu3, Jingang He4, Ziyue Zhao4, Mengying He1, Binbin Nie5, Zili Liu6,  Yingying Chen1, Kuanpin Su7, 8, Xiang Li1, Juxiang Chen9, Hongbing Xiang2, Fuqiang Xu4, 6, Kangguang Lin10, *, Zongze Zhang1, *,  Jie Wang4, 11, 12, *   

  1. 1Department of Anesthesiology, Brain Research Center, Department of Neurosurgery, Zhongnan Hospital, Wuhan University, Wuhan, Hubei Province, China; 2Department of Anesthesiology and Pain Medicine, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China; 3Department of Anesthesia and Intensive Care, Peter Hung Pain Research Institute, The Chinese University of Hong Kong, Hong Kong Special Administration Region, China; 4Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan, Hubei Province, China; 5Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China; 6The Brain Cognition and Brain Disease Institute (BCBDI), NMPA Key Laboratory for Research and Evaluation of Viral Vector Technology in Cell and Gene Therapy Medicinal Products, Shenzhen Key Laboratory of Viral Vectors for Biomedicine, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences; Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, Guangdong Province, China; 7Mind-Body Interface Research Center (MBI-Lab), China Medical University Hospital, Taichung, Taiwan, China; 8An-Nan Hospital, China Medical University, Tainan, Taiwan, China; 9Department of Neurosurgery, Changhai Hospital, Naval Medical University, Shanghai, China; 10Department of Affective Disorders, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China; 11Institute of Neuroscience and Brain Diseases; Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei Province, China; 12University of Chinese Academy of Sciences, Beijing, China
  • Online:2023-11-15 Published:2023-05-04
  • Contact: Jie Wang, PhD, jie.wang@wipm.ac.cn; Zongze Zhang, MD, PhD, zhangzz@whu.edu.cn; Kangguang Lin, MD, PhD, klin@gzhmu.edu.cn.
  • Supported by:
    This study was supported by the National Natural Science Foundation of China, Nos. 81771160 (to ZZ), 81671060 (to CC), 31970973 (to JW), 21921004 (to FX); and the Translational Medicine and Interdisciplinary Research Joint Fund of Zhongnan Hospital of Wuhan University, No. ZNJC201934 (to ZZ).

摘要:

睡眠有利于能量代谢的恢复,从而支持神经元可塑性和认知行为。Sirt6是一种NAD+依赖蛋白脱乙酰酶,可通过调节多种转录调节因子和代谢酶,参与调控能量代谢。为了解Sirt6对慢性睡眠剥夺后大脑功能的影响。实验对慢性睡眠剥夺C57BL/6J小鼠前额叶皮质转染AAV2/9-CMV-Sirt6-EGFP以过表达Sirt6。可见慢性睡眠剥夺后,小鼠前额叶皮质中Sirt6表达显著减少,并伴有认知障碍,且前额叶皮质与伏隔核、梨状皮质、运动皮质、体感皮质、嗅结节、岛状皮质和小脑之间的功能连接明显减少。而Sirt6过表达则能显著逆转慢性睡眠剥夺诱导的上述表现。进一步代谢动力学分析表明,慢性睡眠剥夺还可减少小鼠前额叶皮质神经元中谷氨酸合成酶1和γ-氨基丁酸氨基转移酶的表达,且可通过Sirt6过表达进行恢复。此外,Sirt6过表达还能有效逆转慢性睡眠剥夺诱导的前额叶皮质锥体神经元中微小兴奋性突触后电流的频率与波幅,并恢复动作电位放电频率。因此,Sirt6过表达可通过调节前额叶皮质相关的功能连接网络、神经元葡萄糖代谢以及谷氨酸能神经传递来改善慢性睡眠剥夺后的认知障碍。

https://orcid.org/0000-0002-2997-3450 (Jie Wang); https://orcid.org/0000-0002-3023-8875 (Zongze Zhang); https://orcid.org/0000-0003-4027-5554 (Kangguang Lin)

关键词: 慢性睡眠剥夺, Sirt6, 认知障碍, 代谢动力学, 突触功能, 神经和星形胶质细胞, 功能连接, 快速眼动睡眠, 前额叶皮质, 谷氨酸能神经元

Abstract: Sleep benefits the restoration of energy metabolism and thereby supports neuronal plasticity and cognitive behaviors. Sirt6 is a NAD+-dependent protein deacetylase that has been recognized as an essential regulator of energy metabolism because it modulates various transcriptional regulators and metabolic enzymes. The aim of this study was to investigate the influence of Sirt6 on cerebral function after chronic sleep deprivation (CSD). We assigned C57BL/6J mice to control or two CSD groups and subjected them to AAV2/9-CMV-EGFP or AAV2/9-CMV-Sirt6-EGFP infection in the prelimbic cortex (PrL). We then assessed cerebral functional connectivity (FC) using resting-state functional MRI, neuron/astrocyte metabolism using a metabolic kinetics analysis; dendritic spine densities using sparse-labeling; and miniature excitatory postsynaptic currents (mEPSCs) and action potential (AP) firing rates using whole-cell patch-clamp recordings. In addition, we evaluated cognition via a comprehensive set of behavioral tests. Compared with controls, Sirt6 was significantly decreased (P < 0.05) in the PrL after CSD, accompanied by cognitive deficits and decreased FC between the PrL and accumbens nucleus, piriform cortex, motor cortex, somatosensory cortex, olfactory tubercle, insular cortex, and cerebellum. Sirt6 overexpression reversed CSD-induced cognitive impairment and reduced FC. Our analysis of metabolic kinetics using [1-13C] glucose and [2-13C] acetate showed that CSD reduced neuronal Glu4 and GABA2 synthesis, which could be fully restored via forced Sirt6 expression. Furthermore, Sirt6 overexpression reversed CSD-induced decreases in AP firing rates as well as the frequency and amplitude of mEPSCs in PrL pyramidal neurons. These data indicate that Sirt6 can improve cognitive impairment after CSD by regulating the PrL-associated FC network, neuronal glucose metabolism, and glutamatergic neurotransmission. Thus, Sirt6 activation may have potential as a novel strategy for treating sleep disorder-related diseases.

Key words: chronic sleep deprivation, cognitive impairment, functional connectivity, glutamatergic neurons, metabolic kinetics, neuronal-astrocytic glucose metabolism, prelimbic cortex, REM sleep, Sirt6, synaptic function