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Liang Y, Huang Y, Shao R, Xiao F, Lin F, Dai H, Pan L. Propofol produces neurotoxicity by inducing mitochondrial apoptosis. Exp Ther Med 2022; 24:630. [PMID: 36160898 PMCID: PMC9468839 DOI: 10.3892/etm.2022.11567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 05/10/2022] [Indexed: 11/13/2022] Open
Abstract
Propofol is a fast and short-acting intravenous anesthetic widely used in clinical anesthesia and intensive care unit sedation. However, its use can cause abnormal effects on the central nervous system. Thus, the purpose of this study was to investigate the mechanism of propofol on primary hippocampal neuron injury. In addition, we aimed to determine whether a correlation exists between propofol and mitochondrial apoptosis-induced neurotoxicity. Hippocampal neurons cultured for 4 days were exposed to different drugs. The treatment groups were divided according to drug exposure into propofol, a rotenone inhibitor, and a coenzyme Q10 agonist groups. The final concentrations of propofol were 1, 10 and 100 µM. The content of ATP and reactive oxygen species (ROS) in the neurons of each group were detected using commercial kits in the culture supernatant after 3 h of drug exposure. Western blotting was used to analyze the expression of apoptosis-related proteins. The JC-1 kit was used to detect the mitochondrial membrane potential. The results revealed that, compared with the non-propofol treatment groups, the expression of apoptosis-related proteins, ATP content, and mitochondrial membrane potential were significantly decreased while the ROS content was markedly increased in the propofol treatment group. In conclusion, propofol treatment promoted damage to hippocampal neuronal mitochondria in a dose-dependent manner. This damage may lead to neuronal apoptosis and neurotoxicity by inducing the inhibition of mitochondrial respiratory chain complex I.
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Affiliation(s)
- Yubing Liang
- Department of Anesthesiology, Guangxi Medical University Cancer Hospital, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
| | - Yu Huang
- Department of Anesthesiology, Guangxi Medical University Cancer Hospital, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
| | - Rongge Shao
- Department of Anesthesiology, Guangxi Medical University Cancer Hospital, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
| | - Fei Xiao
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
| | - Fei Lin
- Department of Anesthesiology, Guangxi Medical University Cancer Hospital, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
| | - Huijun Dai
- Department of Anesthesiology, Guangxi Medical University Cancer Hospital, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
| | - Linghui Pan
- Department of Anesthesiology, Guangxi Medical University Cancer Hospital, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
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The Imbalance of Mitochondrial Homeostasis of Peripheral Blood-Derived Macrophages Mediated by MAFLD May Impair the Walking Ability of Elderly Patients with Osteopenia. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:5210870. [PMID: 35368864 PMCID: PMC8970807 DOI: 10.1155/2022/5210870] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/28/2022] [Accepted: 03/04/2022] [Indexed: 12/15/2022]
Abstract
Introduction. Many Asian cohort studies have shown that nonalcoholic fatty liver disease (NAFLD), now renamed as metabolic dysfunction-associated fatty liver disease (MAFLD), increases the risk of osteoporosis, yet the effect of MAFLD on elderly patients with osteopenia (OPe) has not been reported. Objective. This study aimed to explore the influence of MAFLD on the function of macrophages in patients with OPe. Methods. A total of 107 elderly OPe patients with or without MAFLD who visited the Huadong Hospital Affiliated to Fudan University (Shanghai, China) between January 1st, 2021, and September 30th, 2021, were evaluated for an interviewer-assisted questionnaire, as well as clinical and biological assessments. Results. Comparing two groups of elderly patients with the same bone mass level, we found that the six-minute walking distance (
) and short physical performance battery (SPPB) score (
) of the elderly OPe patients with MAFLD are worse than those in OPe patients without MAFLD. Our results confirmed that the mitochondrial reactive oxygen species (mtROS) in peripheral blood of OPe patients with MAFLD was significantly higher than those without. We also observed the mitochondrial metabolism level of peripheral blood-derived macrophages in the included patients and peripheral blood macrophages in patients with MAFLD with more unbalanced mitochondrial dynamics of macrophages, more weakened mitochondrial respiratory capacity, and greater mitochondrial microstructure damage, when compared with the elderly patients without MAFLD. Conclusions. To conclude, our data revealed that MAFLD itself may aggravate the inflammatory state in elderly OPe people due to mitochondrial homeostasis imbalance of peripheral blood macrophages. Damaged monocyte-macrophages might trigger attenuation of the walking ability of OPe patients.
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Liu J, Gu Y, Guo M, Ji X. Neuroprotective effects and mechanisms of ischemic/hypoxic preconditioning on neurological diseases. CNS Neurosci Ther 2021; 27:869-882. [PMID: 34237192 PMCID: PMC8265941 DOI: 10.1111/cns.13642] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 03/23/2021] [Accepted: 03/24/2021] [Indexed: 12/20/2022] Open
Abstract
As the organ with the highest demand for oxygen, the brain has a poor tolerance to ischemia and hypoxia. Despite severe ischemia/hypoxia induces the occurrence and development of various central nervous system (CNS) diseases, sublethal insult may induce strong protection against subsequent fatal injuries by improving tolerance. Searching for potential measures to improve brain ischemic/hypoxic is of great significance for treatment of ischemia/hypoxia related CNS diseases. Ischemic/hypoxic preconditioning (I/HPC) refers to the approach to give the body a short period of mild ischemic/hypoxic stimulus which can significantly improve the body's tolerance to subsequent more severe ischemia/hypoxia event. It has been extensively studied and been considered as an effective therapeutic strategy in CNS diseases. Its protective mechanisms involved multiple processes, such as activation of hypoxia signaling pathways, anti-inflammation, antioxidant stress, and autophagy induction, etc. As a strategy to induce endogenous neuroprotection, I/HPC has attracted extensive attention and become one of the research frontiers and hotspots in the field of neurotherapy. In this review, we discuss the basic and clinical research progress of I/HPC on CNS diseases, and summarize its mechanisms. Furthermore, we highlight the limitations and challenges of their translation from basic research to clinical application.
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Affiliation(s)
- Jia Liu
- Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Institute of Brain Disorders, Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Capital Medical University, Beijing, China
| | - Yakun Gu
- Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Institute of Brain Disorders, Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Capital Medical University, Beijing, China
| | - Mengyuan Guo
- Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Institute of Brain Disorders, Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Capital Medical University, Beijing, China
| | - Xunming Ji
- Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Institute of Brain Disorders, Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Capital Medical University, Beijing, China.,Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
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Huang Y, Gao X, Zhou X, Zhang Y, Tan Z, Zhu S. Remote Ischemic Postconditioning Inhibited Mitophagy to Achieve Neuroprotective Effects in the Rat Model of Cardiac Arrest. Neurochem Res 2021; 46:573-583. [PMID: 33409854 DOI: 10.1007/s11064-020-03193-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 11/08/2020] [Accepted: 12/04/2020] [Indexed: 10/22/2022]
Abstract
Remote ischemic postconditioning (RI-postC) is an effective measure to improve nerve function after cardiac arrest. However, the brain protective mechanism of RI-postC has not been fully elucidated, and whether it is related to mitophagy is unclear. In this study, we used the rat model of cardiac arrest to study the effect of RI-postC on mitophagy and explore its possible signaling pathways. Rats were randomly divided into Sham group, CA/CPR group, Mdivi-1 group and RI-postC group. The animal model of cardiac arrest was established by asphyxia. RI-postC was performed by clamping and loosening the left femoral artery. Mdivi-1 was treated with a single intravenous injection. Levels of TOMM20, TIM23, Mfn1, PINK1 and parkin were detected by western blots. Mitochondrial membrane potential was measured by flow cytometry. Real-time PCR was used to detect relative mitochondrial DNA levels. The apoptosis of hippocampal neurons was detected by flow and TUNEL. In addition, Histopathological tests were performed. The results showed that RI-postC was similar to the mitophagy inhibitor Mdivi-1, which could inhibit the decrease of mitophagy-related protein level, improve mitochondrial membrane potential and up-regulate the ratio of mt-Atp6/Rpl13 after cardiopulmonary resuscitation (CPR). Furthermore, RI-postC could also reduce the rate of hippocampal nerve apoptosis and the damage of hippocampal neurons after CPR. Moreover, RI-postC and Mdivi-1 could reduce the protein levels of PINK1 and parkin in mitochondria after CPR, while increasing PINK1 levels in the cytoplasm. These findings suggested that RI-postC could inhibit the overactivation mitophagy through the PINK1/parkin signaling pathway, thus providing neuroprotective effects.
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Affiliation(s)
- Yang Huang
- The First School of Clinical Medical, Southern Medical University, Guangzhou, China
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command, Wuluo road, 627#, Wuhan, 430070, Hubei, China
| | - Xuhui Gao
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command, Wuluo road, 627#, Wuhan, 430070, Hubei, China
| | - Xiang Zhou
- Department of Anesthesiology, General Hospital of Central Theater Command, Wuhan, China
| | - Yu Zhang
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command, Wuluo road, 627#, Wuhan, 430070, Hubei, China
| | - ZhiTian Tan
- The First School of Clinical Medical, Southern Medical University, Guangzhou, China
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command, Wuluo road, 627#, Wuhan, 430070, Hubei, China
| | - ShuiBo Zhu
- The First School of Clinical Medical, Southern Medical University, Guangzhou, China.
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command, Wuluo road, 627#, Wuhan, 430070, Hubei, China.
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Remote Ischemic Postconditioning Inhibits Hippocampal Neuronal Apoptosis and Mitophagy After Cardiopulmonary Resuscitation in Rats. Shock 2020; 55:74-82. [PMID: 32590695 DOI: 10.1097/shk.0000000000001596] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND Studies have shown that remote ischemic post-conditioning can improve brain damage caused by ischemia and hypoxia. However, the specific mechanism underlying this phenomenon is still unclear. The purpose of this study was to investigate the effects of remote ischemic post-conditioning on neuronal apoptosis and mitophagy after cardiopulmonary resuscitation (CPR) in rats. METHODS Male Sprague-Dawley rats were used to establish an asphyxia cardiac arrest model by clamping the tracheal duct. First, the expression levels of P53, Cytochrome c (Cytc), and Parkin in the cytoplasm and mitochondria were observed at 3, 6, 24, and 72 h after the restoration of spontaneous circulation (ROSC). Then neurological deficit scores, hippocampal neuron apoptosis, mitochondrial P53 and Parkin, cytoplasmic Cytc, and neuron ultrastructure were evaluated 24 h after ROSC. RESULTS P53 and Parkin can translocate from the cytoplasm to the mitochondria, promoting the translocation of cytoplasmic Cytc to mitochondria after CPR, reaching a peak at 24 h after the ROSC. The P53 inhibitor Pifithrin-μ reduced apoptosis induced by P53 mitochondrial translocation. Apoptosis was induced after cardiac arrest and attenuated by remote ischemic postconditioning via inhibiting P53 mitochondrial translocation and the release of Cytc to the cytoplasm. In addition, remote ischemic postconditioning could inhibit Parkin-mediated mitophagy. CONCLUSION Taken together, our results show that remote ischemic post-conditioning improves neural function after CPR by inhibiting P53 mitochondrial translocation-induced apoptosis and Parkin-mediated mitophagy.
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Zhou X, Qu Y, Gan G, Zhu S, Huang Y, Liu Y, Zhu J, Xie B, Tan Z. Cyclosporine A Plus Ischemic Postconditioning Improves Neurological Function in Rats After Cardiac Resuscitation. Neurocrit Care 2020; 32:812-821. [PMID: 31576483 DOI: 10.1007/s12028-019-00849-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND OBJECTIVE Attenuation of neuronal apoptosis helps maintain neurological function in patients after cardiac arrest. After ischemia-reperfusion, both cyclosporin A (CsA) and ischemic postconditioning independently protect mitochondria and thus reduce nerve injury. This study employed a rat model to evaluate the neuroprotective effect of combining ischemic postconditioning with CsA after cardiopulmonary resuscitation (CPR). METHODS Rats were apportioned equally to model control, postconditioned, CsA-treated, or CsA + postconditioned groups. Asphyxial cardiac arrest was imposed using modified Utstein-style guidelines. In the appropriate groups, postconditioning was implemented by ischemia and reperfusion (clamping and loosening the left femoral artery); CsA treatment was delivered with a single intravenous dose. Neurological deficits were scored at different times after CPR. Histological evaluation and electron microscopy were used to evaluate tissue damage, and TUNEL and flow cytometry were used to measure the apoptotic rate of hippocampal neurons and size of the mitochondrial permeability transition pore (mPTP) opening. RESULTS The apoptotic rate was significantly lower in the postconditioned and CsA-treated groups compared with the model control and lowest in the CsA + postconditioned group. By histological evaluation and electron microscopy, the least damage was observed in the CsA + postconditioned group. The neurological deficit score of the CsA + postconditioned group was significantly higher than that of the CsA-treated group, but the size of the mPTP openings of these two groups was comparable. CONCLUSION Ischemic postconditioning combined with CsA exerted a better neuroprotective effect after CPR than did either postconditioning or CsA alone. Inhibiting the opening of the mPTP is not the only neuroprotective mechanism.
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Affiliation(s)
- Xiang Zhou
- Department of Anesthesiology, General Hospital of Central Theater Command of People's Liberation Army of China, Wuhan, China
- Southern Medical University, Guangzhou, China
| | - YanLiang Qu
- Department of Anesthesiology, No. 971 Hospital of the PLA Navy, Qingdao, China
| | - GuoShen Gan
- Southern Medical University, Guangzhou, China
| | - ShuiBo Zhu
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command of People's Liberation Army of China, 627 Wuluo Road, Wuhan, 430070, Hubei, China.
- Southern Medical University, Guangzhou, China.
| | - Yang Huang
- Southern Medical University, Guangzhou, China
| | - Yong Liu
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command of People's Liberation Army of China, 627 Wuluo Road, Wuhan, 430070, Hubei, China
| | - Jian Zhu
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command of People's Liberation Army of China, 627 Wuluo Road, Wuhan, 430070, Hubei, China
| | - Biao Xie
- Southern Medical University, Guangzhou, China
| | - ZhiTian Tan
- Southern Medical University, Guangzhou, China
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Mitophagy in the Hippocampus Is Excessive Activated After Cardiac Arrest and Cardiopulmonary Resuscitation. Neurochem Res 2019; 45:322-330. [PMID: 31773373 DOI: 10.1007/s11064-019-02916-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 11/11/2019] [Accepted: 11/19/2019] [Indexed: 12/14/2022]
Abstract
This study examined the activation of mitophagy following cardiac arrest (CA) and cardiopulmonary resuscitation (CPR) and the relationship between the change with time and apoptosis. MAIN METHODS The male Sprague-Dawley rats were randomized into four groups: Sham group, CPR24h group, CPR48h group, CPR72h group. The rat model of cardiac arrest was established by asphyxiation. We employed western blot to analyze the levels of mitophagy related proteins of hippocampus, JC-1 to detect mitochondrial membrane potential (MMP) and flow cytometry to measure the rate of apoptosis of hippocampal neurons. Moreover, we also intuitively observed the occurrence of mitophagy through electron microscopy. KEY FINDINGS The results showed that the levels of TOMM20 and Tim23 protein were significantly decreased after CPR, which were more remarkable following 72 h of CPR. However, the protein levels of dynamin related protein 1 (Drp1) and cytochrome C (Cyt-c) were strongly up-regulated after CPR. Meanwhile, the hippocampal MMP decreased gradually with time after CPR. Furthermore, we more intuitively verified the activation of mitophagy through electron microscopy. In addition, the rats of apoptosis rate of hippocampus after CPR were significantly increased, which were gradually enhanced over time from 24 h until at least 72 h following CPR. SIGNIFICANCE with the enhancement of mitophagy, the apoptosis of hippocampal neurons was gradually enhanced, which suggested mitophagy may be excessive activated and aggravating brain damage after CA and CPR.
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