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Ling Q, Zhang J, Zhong L, Li X, Sun T, Xiang H, Manyande A, Zhao G, Shi Y, Zhu Q. The role of gut microbiota in chronic restraint stress-induced cognitive deficits in mice. BMC Microbiol 2024; 24:289. [PMID: 39095715 PMCID: PMC11295512 DOI: 10.1186/s12866-024-03435-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 07/23/2024] [Indexed: 08/04/2024] Open
Abstract
BACKGROUND Chronic stress induces cognitive deficits. There is a well-established connection between the enteric and central nervous systems through the microbiota-gut-brain (MGB) axis. However, the effects of the gut microbiota on cognitive deficits remain unclear. The present study aimed to elucidate the microbiota composition in cognitive deficits and explore its potential in predicting chronic stress-induced cognitive deficits. METHODS Mice were randomly divided into control and chronic restraint stress (CRS) groups. The mice subjected to CRS were further divided into cognitive deficit (CRS-CD) and non-cognitive deficit (CRS-NCD) groups using hierarchical cluster analysis of novel object recognition test results. The composition and diversity of the gut microbiota were analyzed. RESULTS After being subjected to chronic restraint distress, the CRS-CD mice travelled shorter movement distances (p = 0.034 vs. CRS-NCD; p < 0.001 vs. control) and had a lower recognition index than the CRS-NCD (p < 0.0001 vs. CRS-NCD; p < 0.0001 vs. control) and control mice. The results revealed that 5 gut bacteria at genus levels were significantly different in the fecal samples of mice in the three groups. Further analyses demonstrated that Muricomes were not only significantly enriched in the CRS-CD group but also correlated with a decreased cognitive index. The area under the receiver operating curve of Muricomes for CRS-induced cognitive deficits was 0.96. CONCLUSIONS Our study indicates that the composition of the gut microbiota is involved in the development of cognitive deficits induced by chronic restraint stress. Further analysis revealed that Muricomes have the potential to predict the development of chronic stress-induced cognitive deficits in mice.
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Affiliation(s)
- Qiong Ling
- Department of Anesthesiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangdong Provincial Hospital of Traditional Chinese Medicine, No.111 Dade Road, Yuexiu District, Guangzhou, 510120, China
| | - Junhong Zhang
- Department of Research Public Service Center, The Second Affiliated Hospital of Guangzhou, University of Chinese Medicine, Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou, China
- The Second Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Lin Zhong
- Department of Anesthesiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangdong Provincial Hospital of Traditional Chinese Medicine, No.111 Dade Road, Yuexiu District, Guangzhou, 510120, China
| | - Xiangyu Li
- Department of Anesthesiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangdong Provincial Hospital of Traditional Chinese Medicine, No.111 Dade Road, Yuexiu District, Guangzhou, 510120, China
| | - Tianning Sun
- Department of Anesthesiology and Pain Medicine, Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, Wuhan Clinical Research Center for Geriatric Anesthesia, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hongbing Xiang
- Department of Anesthesiology and Pain Medicine, Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, Wuhan Clinical Research Center for Geriatric Anesthesia, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Anne Manyande
- School of Human and Social Sciences, University of West London, London, UK
| | - Gaofeng Zhao
- Department of Anesthesiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangdong Provincial Hospital of Traditional Chinese Medicine, No.111 Dade Road, Yuexiu District, Guangzhou, 510120, China.
| | - Yongyong Shi
- Department of Anesthesiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangdong Provincial Hospital of Traditional Chinese Medicine, No.111 Dade Road, Yuexiu District, Guangzhou, 510120, China.
| | - Qianqian Zhu
- Department of Anesthesiology, The Seventh Affiliated Hospital of Sun Yat-Sen University, Shenzhen, 518107, Guangdong Province, China.
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Wen Y, Xu J, Shen J, Tang Z, Li S, Zhang Q, Li J, Sun J. Esketamine Prevents Postoperative Emotional and Cognitive Dysfunction by Suppressing Microglial M1 Polarization and Regulating the BDNF-TrkB Pathway in Ageing Rats with Preoperative Sleep Disturbance. Mol Neurobiol 2024; 61:5680-5698. [PMID: 38221533 PMCID: PMC11249437 DOI: 10.1007/s12035-023-03860-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 12/04/2023] [Indexed: 01/16/2024]
Abstract
Postoperative depression (POD) and postoperative cognitive dysfunction (POCD) have placed heavy burden on patients' physical and mental health in recent years. Sleep disturbance before surgery is a common phenomenon that has been increasingly believed to affect patients' recovery, especially in aged patients, while little attention has been paid to sleep disruption before surgery and the potential mechanism remains ambiguous. Ketamine has been reported to attenuate POCD after cardiac surgery and elicit rapid-acting and sustained antidepressant actions. The present study aimed to clarify the effect of esketamine's (the S-enantiomer of ketamine) protective effects and possible mechanisms of action in POCD and POD. Our results showed that sleep disturbance before surgery exacerbated microglial M1 polarization and microglial BDNF-TrkB signalling dysfunction induced by surgery, resulting in postoperative emotional changes and cognitive impairments. Notably, treatment with esketamine reversed the behavioural abnormalities through inhibiting the M1 polarization of microglia and the inflammatory response thus improving BDNF-TrkB signalling in vivo and vitro. In addition, esketamine administration also reversed the impaired hippocampal synaptic plasticity which has been perturbed by sleep disturbance and surgery. These findings warrant further investigations into the interplay of esketamine and may provide novel ideas for the implication of preoperative preparations and the prevention of postoperative brain-related complications.
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Affiliation(s)
- Yuxin Wen
- Zhejiang University School of Medicine, Hangzhou, China
| | - Jiawen Xu
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University, Hangzhou, China
| | - Jiahong Shen
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University, Hangzhou, China
| | - Zili Tang
- Department of Anesthesiology, The Fourth Clinical School of Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Shuxin Li
- Department of Anesthesiology, The Fourth Clinical School of Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Qun Zhang
- School of Second Clinical Medical College, Wenzhou Medical University, Wenzhou, China
| | - Jiaqi Li
- Zhejiang University School of Medicine, Hangzhou, China
| | - Jianliang Sun
- Zhejiang University School of Medicine, Hangzhou, China.
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University, Hangzhou, China.
- Department of Anesthesiology, The Fourth Clinical School of Medicine, Zhejiang Chinese Medical University, Hangzhou, China.
- School of Second Clinical Medical College, Wenzhou Medical University, Wenzhou, China.
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Liang ZK, Xiong W, Wang C, Chen L, Zou X, Mai JW, Dong B, Guo C, Xin WJ, Luo DX, Xu T, Feng X. Resolving neuroinflammatory and social deficits in ASD model mice: Dexmedetomidine downregulates NF-κB/IL-6 pathway via α2AR. Brain Behav Immun 2024; 119:84-95. [PMID: 38552922 DOI: 10.1016/j.bbi.2024.03.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 03/12/2024] [Accepted: 03/26/2024] [Indexed: 04/05/2024] Open
Abstract
Autism spectrum disorder (ASD) is a neurodevelopmental disorder that severely affects individuals' daily life and social development. Unfortunately, there are currently no effective treatments for ASD. Dexmedetomidine (DEX) is a selective agonist of α2 adrenergic receptor (α2AR) and is widely used as a first-line medication for sedation and hypnosis in clinical practice. In recent years, there have been reports suggesting its potential positive effects on improving emotional and cognitive functions. However, whether dexmedetomidine has therapeutic effects on the core symptoms of ASD, namely social deficits and repetitive behaviors, remains to be investigated. In the present study, we employed various behavioral tests to assess the phenotypes of animals, including the three-chamber, self-grooming, marble burying, open field, and elevated plus maze. Additionally, electrophysiological recordings, western blotting, qPCR were mainly used to investigate and validate the potential mechanisms underlying the role of dexmedetomidine. We found that intraperitoneal injection of dexmedetomidine in ASD model mice-BTBR T+ Itpr3tf/J (BTBR) mice could adaptively improve their social deficits. Further, we observed a significant reduction in c-Fos positive signals and interleukin-6 (IL-6) expression level in the prelimbic cortex (PrL) of the BTBR mice treated with dexmedetomidine. Enhancing or inhibiting the action of IL-6 directly affects the social behavior of BTBR mice. Mechanistically, we have found that NF-κB p65 is a key pathway regulating IL-6 expression in the PrL region. In addition, we have confirmed that the α2AR acts as a receptor switch mediating the beneficial effects of dexmedetomidine in improving social deficits. This study provides the first evidence of the beneficial effects of dexmedetomidine on core symptoms of ASD and offers a theoretical basis and potential therapeutic approach for the clinical treatment of ASD.
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Affiliation(s)
- Zheng-Kai Liang
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, PR China
| | - Wei Xiong
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, PR China
| | - Chen Wang
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, PR China
| | - Li Chen
- Neuroscience Program, Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, PR China
| | - Xin Zou
- Neuroscience Program, Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, PR China
| | - Jing-Wen Mai
- Department of Anesthesiology, Huizhou Central People's Hospital, Huizhou 516000, PR China
| | - Bo Dong
- Neuroscience Program, Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, PR China
| | - Chongqi Guo
- Neuroscience Program, Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, PR China
| | - Wen-Jun Xin
- Neuroscience Program, Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, PR China
| | - De-Xing Luo
- Department of Anesthesiology, Huizhou Central People's Hospital, Huizhou 516000, PR China.
| | - Ting Xu
- Neuroscience Program, Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, PR China.
| | - Xia Feng
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, PR China.
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Li N, Ma Y, Li C, Sun M, Qi F. Dexmedetomidine alleviates sevoflurane-induced neuroinflammation and neurocognitive disorders by suppressing the P2X4R/NLRP3 pathway in aged mice. Int J Neurosci 2024; 134:511-521. [PMID: 36066545 DOI: 10.1080/00207454.2022.2121921] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/25/2022] [Accepted: 09/01/2022] [Indexed: 10/14/2022]
Abstract
PURPOSE Microglia-mediated inflammation is associated with perioperative neurocognitive disorders (PNDs) caused by sevoflurane. Dexmedetomidine has been reported to protect against sevoflurane-induced cognitive impairment. In this study, we investigated the effects and underlying mechanisms of dexmedetomidine on sevoflurane-induced microglial neuroinflammation and PNDs. METHODS Wild-type and purinergic ionotropic 4 receptor (P2X4R) overexpressing C57/BL6 mice were intraperitoneally injected with 20 μg/kg dexmedetomidine or an equal volume of normal saline 2 h prior to sevoflurane exposure. The Morris water maze (MWM) test was performed to assess cognitive function. Immunofluorescence staining was employed to detect microglial activation. The expression levels of proinflammatory cytokines were measured by real-time quantitative PCR (qRT-PCR) and enzyme-linked immunosorbent assay (ELISA). The protein levels of P2X4R and NOD-like receptor protein 3 (NLRP3) were detected by Western Blotting. RESULTS Sevoflurane increased the number of microglia, upregulated the levels of proinflammatory cytokines, elevated the protein levels of P2X4R and NLRP3 in the hippocampus and induced cognitive decline, while pretreatment with dexmedetomidine downregulated the protein levels of P2X4R and NLRP3, alleviated sevoflurane-induced microglial neuroinflammation and improved cognitive dysfunction. Moreover, overexpression of P2X4R weakened the neuroprotective effect of dexmedetomidine. CONCLUSIONS Dexmedetomidine protected against sevoflurane-induced neuroinflammation and neurocognitive disorders by suppressing the P2X4R/NLRP3 pathway.
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Affiliation(s)
- Ning Li
- Department of Anesthesiology, Qilu Hospital of Shandong University, Jinan, China
- Department of Anesthesiology, The Second Hospital of Shandong University, Jinan, China
| | - Yufeng Ma
- Department of Anesthesiology, The Second Hospital of Shandong University, Jinan, China
| | - Chuangang Li
- Department of Anesthesiology, The Second Hospital of Shandong University, Jinan, China
| | - Manyi Sun
- Department of Anesthesiology, The Second Hospital of Shandong University, Jinan, China
| | - Feng Qi
- Department of Anesthesiology, Qilu Hospital of Shandong University, Jinan, China
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Shen J, Xu J, Wen Y, Tang Z, Li J, Sun J. Carnosine ameliorates postoperative cognitive dysfunction of aged rats by limiting astrocytes pyroptosis. Neurotherapeutics 2024; 21:e00359. [PMID: 38664193 PMCID: PMC11301240 DOI: 10.1016/j.neurot.2024.e00359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 03/22/2024] [Accepted: 04/09/2024] [Indexed: 07/15/2024] Open
Abstract
Postoperative cognitive dysfunction (POCD) is a common postoperative complication in elderly patients, and neuroinflammation is a key hallmark. Recent studies suggest that the NOD-like receptor family, pyrin domain containing 3 (NLRP3) inflammasome-mediated astrocytes pyroptosis is involved in the regulation of neuroinflammation in many neurocognitive diseases, while its role in POCD remains obscure. Carnosine is a natural endogenous dipeptide with anti-inflammatory and neuroprotective effects. To explore the effect of carnosine on POCD and its mechanism, we established a POCD model by exploratory laparotomy in 24-month-old male Sprague-Dawley rats. We found that the administrated of carnosine notably attenuated surgery-induced NLRP3 inflammasome activation and pyroptosis in astrocytes, central inflammation, and neuronal damage in the hippocampus of aged rats. In addition, carnosine dramatically ameliorated the learning and memory deficits of surgery-induced aged rats. Then in the in vitro experiments, we stimulated primary astrocytes with lipopolysaccharide (LPS) after carnosine pretreatment. The results also showed that the application of carnosine alleviated the activation of the NLRP3 inflammasome, pyroptosis, and inflammatory response in astrocytes stimulated by LPS. Taken together, these findings suggest that carnosine improves POCD in aged rats via inhibiting NLRP3-mediated astrocytes pyroptosis and neuroinflammation.
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Affiliation(s)
- Jiahong Shen
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University, Hangzhou, China
| | - Jiawen Xu
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University, Hangzhou, China
| | - Yuxin Wen
- Zhejiang University School of Medicine, Hangzhou, China
| | - Zili Tang
- Department of Anesthesiology, The Fourth Clinical School of Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jiaqi Li
- Zhejiang University School of Medicine, Hangzhou, China
| | - Jianliang Sun
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University, Hangzhou, China; Zhejiang University School of Medicine, Hangzhou, China; Department of Anesthesiology, The Fourth Clinical School of Medicine, Zhejiang Chinese Medical University, Hangzhou, China.
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Wang G, Shen J, Guan Q, Lin Y, Zhai L, Shen H. LncRNA-AC020978 Promotes Metabolic Reprogramming in M1 Microglial Cells in Postoperative Cognitive Disorder via PKM2. Mol Neurobiol 2024; 61:2459-2467. [PMID: 37897635 DOI: 10.1007/s12035-023-03729-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Accepted: 10/19/2023] [Indexed: 10/30/2023]
Abstract
The present work aimed to explore the role of long non-coding RNA (lncRNA)-AC020978 in postoperative cognitive disorder (POCD) and the underlying mechanism. The POCD mouse model was constructed through isoflurane anesthesia + abbreviated laparotomy. The AC020978 expression in brain tissue was silenced after lentivirus injection, then Morris water maze test was conducted to detect the cognitive disorder level, flow cytometry was performed to analyze M1 macrophage level, ELISA was carried out to measure inflammatory factor levels, H&E, Nissl and immunohistochemical staining was performed to detect the pathological changes in brain tissue, and Western blotting assay was adopted to detect protein expression. In addition, microglial cells were cultured in vitro, after lentivirus infection, the effect of AC020978 on the M1 polarization of microglial cells and glycolysis was observed. AC020978 overexpression promoted POCD progression and aggravated cognitive disorder in mice; in addition, the proportion of peripheral and central M1 cells increased, the inflammatory factor levels were upregulated, and microglial cells were activated. By contrast, AC020978 silencing led to cognitive disorder in mice and suppressed microglial cell activation and M1 polarization. In vitro experimental results indicated that AC020978 promoted the expression and phosphorylation of PKM2, which promoted inflammatory response through enhancing microglial cell glycolysis and M1 polarization. AC020978 interacts with PKM2 to promote the glycolysis and M1 polarization of microglial cells, thus regulating cognitive disorder and central inflammation in POCD.
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Affiliation(s)
- Genghuan Wang
- Department of Neurosurgery, The Second Affiliated Hospital of Jiaxing University, Jiaxing, China
| | - Jian Shen
- Department of Neurosurgery, The Second Affiliated Hospital of Jiaxing University, Jiaxing, China
| | - Qiaobing Guan
- Department of Neurology, The Second Affiliated Hospital of Jiaxing University, Jiaxing, China
| | - Yingcong Lin
- Department of Neurosurgery, The Second Affiliated Hospital of Jiaxing University, Jiaxing, China
- Zhejiang Chinese Medical University, Hangzhou, China
| | - Liping Zhai
- Department of Neurology, The Second Affiliated Hospital of Jiaxing University, Jiaxing, China.
| | - Heping Shen
- Department of Neurology, The Second Affiliated Hospital of Jiaxing University, Jiaxing, China.
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Chen F, Lu K, Bai N, Hao Y, Wang H, Zhao X, Yue F. Oral administration of ellagic acid mitigates perioperative neurocognitive disorders, hippocampal oxidative stress, and neuroinflammation in aged mice by restoring IGF-1 signaling. Sci Rep 2024; 14:2509. [PMID: 38291199 PMCID: PMC10827749 DOI: 10.1038/s41598-024-53127-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 01/29/2024] [Indexed: 02/01/2024] Open
Abstract
This study investigates the potential of ellagic acid (EA), a phytochemical with antioxidant and anti-inflammatory properties, in managing perioperative neurocognitive disorders (PND). PND, which represents a spectrum of cognitive impairments often faced by elderly patients, is principally linked to surgical and anesthesia procedures, and heavily impacted by oxidative stress in the hippocampus and microglia-induced neuroinflammation. Employing an aged mice model subjected to abdominal surgery, we delve into EA's ability to counteract postoperative oxidative stress and cerebral inflammation by engaging the Insulin-like growth factor-1 (IGF-1) pathway. Our findings revealed that administering EA orally notably alleviated post-surgical cognitive decline in older mice, a fact that was manifested in improved performance during maze tests. This enhancement in the behavioral performance of the EA-treated mice corresponded with the rejuvenation of IGF-1 signaling, a decrease in oxidative stress markers in the hippocampus (like MDA and carbonylated protein), and an increase in the activity of antioxidant enzymes such as SOD and CAT. Alongside these, we observed a decrease in microglia-driven neuroinflammation in the hippocampus, thus underscoring the antioxidant and anti-inflammatory roles of EA. Interestingly, when EA was given in conjunction with an IGF1R inhibitor, these benefits were annulled, accentuating the pivotal role that the IGF-1 pathway plays in the neuroprotective potential of EA. Hence, EA could serve as a potent candidate for safeguarding against PND in older patients by curbing oxidative stress and neuroinflammation through the activation of the IGF-1 pathway.
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Affiliation(s)
- Fang Chen
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China
| | - Kai Lu
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China
| | - Ning Bai
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China
| | - Yabo Hao
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China
| | - Hui Wang
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China
| | - Xinrong Zhao
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China
| | - Fang Yue
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China.
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Zhu M, Li M, Yang S, Li J, Gong C, Yu Q, Chen C, Zhang Y, Lin J, Tu F. Fish oil omega-3 Fatty Acids Alleviate Postoperative delirium-like Behavior in aged mice by Attenuating Neuroinflammation and Oxidative Stress. Neurochem Res 2024; 49:157-169. [PMID: 37640824 DOI: 10.1007/s11064-023-04020-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/19/2023] [Accepted: 08/22/2023] [Indexed: 08/31/2023]
Abstract
Postoperative delirium (POD) is a common and serious neuropsychiatric syndrome among older patients, and lacks effective therapies. Omega-3 fatty acids, possessing anti-inflammatory and antioxidant properties, have shown potent neuroprotective effects in several diseases. The present study investigated whether omega-3 fatty acids could exert a neuroprotective role against POD in aged mice. A mouse model of POD was established to explore the role of omega-3 fatty acids in laparotomy-induced delirium-like behavior by evaluating systemic inflammatory changes, neuroinflammation, oxidative stress, and behavior at different time points in aged mice. Oral gavage with omega-3 fatty acids (300 mg/kg) for 3 weeks before surgery significantly attenuated anesthesia/surgery-induced POD-like behavior and the accumulation of proinflammatory cytokines from the peripheral blood in aged mice. Moreover, it also remarkably mitigated neuroinflammation and the oxidative stress response (malondialdehyde [MDA] and superoxide dismutase [SOD]) in the prefrontal cortex and hippocampus of surgical mice. Our findings provided evidence that pretreatment with omega-3 fatty acids may play a vital role in the treatment of POD through mechanisms involving its anti-inflammatory and antioxidant effects, which may be a promising prevention strategy for POD in aged patients.
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Affiliation(s)
- Min Zhu
- Department of Anesthesiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Ming Li
- Department of Anesthesiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Simin Yang
- Department of Anesthesiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
- , Department of Anesthesiology, Suining Central Hospital, Suining, Sichuan, China
| | - Jiang Li
- Department of Anesthesiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Cansheng Gong
- Department of Anesthesiology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, Fuzhou, China
| | - Qingbo Yu
- Department of Anesthesiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Changlin Chen
- Department of Anesthesiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Yang Zhang
- Department of Anesthesiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Jingyan Lin
- Department of Anesthesiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China.
| | - Faping Tu
- Department of Anesthesiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China.
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Xu HJ, Li XP, Han LY. Role and mechanism of esketamine in improving postoperative cognitive dysfunction in aged mice through the TLR4/MyD88/p38 MAPK pathway. Kaohsiung J Med Sci 2024; 40:63-73. [PMID: 38018683 DOI: 10.1002/kjm2.12778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 08/31/2023] [Accepted: 09/17/2023] [Indexed: 11/30/2023] Open
Abstract
Postoperative cognitive dysfunction (POCD) is a significant concern for the elderly population worldwide. This study explored the effects of esketamine on aged mice with POCD and investigate its mechanism of action involving the TLR4/MyD88/MAPK pathway. We administrated esketamine, along with lipopolysaccharide or anisomycin, to the aged POCD mouse models. We assessed their cognitive function using the Morris water maze test. Additionally, we evaluated histopathological changes/neuronal apoptosis in the mouse hippocampal CA1 area through HE/TUNEL stainings. Furthermore, we measured IL-1β/IL-6/TNF-α/TLR4/MyD88/MAPK (p-p38/p38) levels in mouse hippocampal tissues using ELISA/RT-qPCR/Western blotting. Lastly, we analyzed the interaction between TLR4 and MyD88 using a co-immunoprecipitation assay. Our findings showed that esketamine effectively mitigated POCD in aged mice. This was evident from the improved cognitive performance observed in the Morris water maze test, characterized by reduced escape latency/increased number of platform crossing/a higher percentage of time spent in the target quadrant. Furthermore, esketamine exhibited a protective effect against neuronal apoptosis and reduced the levels of inflammatory factors. These findings suggest that esketamine exerts an anti-inflammatory effect by downregulating TLR4/MyD88, thereby attenuating the inflammatory response associated with POCD. Additionally, esketamine suppressed the p38 MAPK pathway by inhibiting the TLR4/MyD88 signaling cascade. Esketamine demonstrated its efficacy in improving postoperative inflammation and cognitive impairment in aged mice by inhibiting the TLR4/MyD88 pathway. The activation of p38 MAPK signaling diminished the beneficial effects of esketamine in aged POCD mice. Collectively, the underlying mechanism of esketamine in mitigating POCD in aged mice involves the suppression of the TLR4/MyD88/p38 MAPK pathway.
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Affiliation(s)
- Hu-Jun Xu
- Department of Anesthesiology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Xian-Peng Li
- Department of Anesthesiology, The 960th Hospital of the PLA Joint Logistics Support Force, Jinan, Shandong, China
| | - Li-Ye Han
- Department of Anesthesiology, The 960th Hospital of the PLA Joint Logistics Support Force, Jinan, Shandong, China
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Fu S, Zhao X, Li Y, Fan X, Huang Z. Dexmedetomidine alleviates hippocampal neuronal loss and cognitive decline in rats undergoing open surgery under sevoflurane anaesthesia by suppressing CCAAT/enhancer-binding protein beta. Eur J Neurosci 2024; 59:36-53. [PMID: 37985440 DOI: 10.1111/ejn.16193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 10/18/2023] [Accepted: 10/29/2023] [Indexed: 11/22/2023]
Abstract
Dexmedetomidine (Dex) may exert neuroprotective effects by attenuating inflammatory responses. However, whether Dex specifically improves postoperative cognitive dysfunction (POCD) by inhibiting microglial inflammation through what pathway remains unclear. In this study, the POCD model was constructed by performing open surgery after 3 h of continuous inhalation of 3% sevoflurane to rats, which were intraperitoneally injected with 25 μg/kg Dex .5 h before anaesthesia. The results displayed that Dex intervention decreased rat escape latency, maintained swimming speed and increased the number of times rats crossed the platform and the time spent in the target quadrant. Furthermore, the rat neuronal injury was restored, alleviated POCD modelling-induced rat hippocampal microglial activation and inhibited microglial M1 type polarization. Besides, we administered Dex injection and/or CCAAT/enhancer-binding protein beta (CEBPB) knockdown on the basis of sevoflurane exposure and open surgery and found that CEBPB was knocked down, resulting in the inability of Dex to function, which confirmed CEBPB as a target for Dex treatment. To sum up, Dex improved POCD by considering CEBPB as a drug target to activate the c-Jun N-terminal kinase (JNK)/p-38 signaling pathway, inhibiting microglial M1 polarization-mediated inflammation in the central nervous system.
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Affiliation(s)
- Shanshan Fu
- Department of Anesthesiology, Cancer Hospital of Dalian University of Technology/Liaoning Cancer Hospital, Shenyang, Liaoning, China
| | - Xianghai Zhao
- Department of Anesthesiology, Stomatological Hospital Affiliated to China Medical University, Shenyang, Liaoning, China
| | - Yingna Li
- Department of Anesthesiology, Cancer Hospital of Dalian University of Technology/Liaoning Cancer Hospital, Shenyang, Liaoning, China
| | - Xinwen Fan
- Department of Anesthesiology, Cancer Hospital of Dalian University of Technology/Liaoning Cancer Hospital, Shenyang, Liaoning, China
| | - Zeqing Huang
- Department of Anesthesiology, Cancer Hospital of Dalian University of Technology/Liaoning Cancer Hospital, Shenyang, Liaoning, China
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11
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Wu P, He B, Li X, Zhang H. Roles of microRNA-124 in traumatic brain injury: a comprehensive review. Front Cell Neurosci 2023; 17:1298508. [PMID: 38034588 PMCID: PMC10687822 DOI: 10.3389/fncel.2023.1298508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 10/31/2023] [Indexed: 12/02/2023] Open
Abstract
Traumatic brain injury (TBI) is a prominent global cause of mortality due to the limited availability of effective prevention and treatment strategies for this disorder. An effective molecular biomarker may contribute to determining the prognosis and promoting the therapeutic efficiency of TBI. MicroRNA-124 (miR-124) is most abundantly expressed in the brain and exerts different biological effects in a variety of diseases by regulating pathological processes of apoptosis and proliferation. Recently, increasing evidence has demonstrated the association between miR-124 and TBI, but there is still a lack of relevant literature to summarize the current evidence on this topic. Based on this review, we found that miR-124 was involved as a regulatory factor in cell apoptosis and proliferation, and was also strongly related with the pathophysiological development of TBI. MiR-124 played an essential role in TBI by interacting with multiple biomolecules and signaling pathways, such as JNK, VAMP-3, Rela/ApoE, PDE4B/mTOR, MDK/TLR4/NF-κB, DAPK1/NR2B, JAK/STAT3, PI3K/AKT, Ras/MEK/Erk. The potential benefits of upregulating miR-124 in facilitating TBI recovery have been identified. The advancement of miRNA nanocarrier system technology presents an opportunity for miR-124 to emerge as a novel therapeutic target for TBI. However, the specific mechanisms underlying the role of miR-124 in TBI necessitate further investigation. Additionally, comprehensive large-scale studies are required to evaluate the clinical significance of miR-124 as a therapeutic target for TBI.
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Affiliation(s)
- Panxing Wu
- Department of Neurosurgery, Taizhou Central Hospital (Taizhou University Hospital), Taizhou, Zhejiang, China
| | - Bao He
- Department of Neurosurgery, The First People’s hospital of Kunshan, Affiliated Kunshan Hospital of Jiangsu University, Suzhou, Jiangsu, China
| | - Xiaoliang Li
- Department of Neurosurgery, The First People’s hospital of Kunshan, Affiliated Kunshan Hospital of Jiangsu University, Suzhou, Jiangsu, China
- Suzhou Key Laboratory of Neuro-Oncology and Nano-Bionics, Suzhou, Jiangsu, China
| | - Hongwei Zhang
- Department of Emergency Medicine, Taizhou Central Hospital (Taizhou University Hospital), Taizhou, China
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12
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Xiao W, Chen S, Chen J, Huang J. Dexmedetomidine alleviates propofol-induced neural injury in developing rats. Int J Dev Neurosci 2023; 83:631-640. [PMID: 37550504 DOI: 10.1002/jdn.10291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/01/2023] [Accepted: 07/14/2023] [Indexed: 08/09/2023] Open
Abstract
Propofol, a commonly used intravenous anesthetic, has been associated with neurodegeneration in the developing brain upon repeated exposure. Dexmedetomidine is an α2 adrenoceptor agonist that was previously reported to possess neuroprotective properties. Here, we confirmed the impacts of dexmedetomidine on propofol-induced neuroapoptosis and subsequent spatial learning and memory deficits in neonatal rats. We found that dexmedetomidine effectively mitigated propofol-induced spatial learning and memory impairments and improved aversive memory in developing rats. Dexmedetomidine reduced propofol-induced cell apoptosis in the hippocampus and modulated the mRNA expression of Bcl-2 and Bax. Additionally, dexmedetomidine attenuated the propofol-induced increase of inflammatory factors IL-6 and TNF-α. The reduced phosphorylation levels of Akt and CREB levels by propofol were re-activated by dexmedetomidine. In conclusion, our findings demonstrated that dexmedetomidine effectively mitigated propofol-induced cognitive and memory impairments in developing rats by modulating apoptosis and reducing inflammation via activating the Akt/CREB/BDNF signaling pathway. These findings suggest potential strategies to protect the developing brain from the adverse effects of anesthetics and improve patient care in pediatric anesthesia practice.
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Affiliation(s)
- Weiren Xiao
- Department of Anesthesiology, Zhangzhou Affiliated Hospital of Fujian Medical University, Zhangzhou, Fujian, China
| | - Shouren Chen
- Department of Neurosurgery, Zhangzhou Affiliated Hospital of Fujian Medical University, Zhangzhou, Fujian, China
| | - Jinzhuan Chen
- Department of Anesthesiology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Jianzhong Huang
- Department of Anesthesiology, Zhangzhou Affiliated Hospital of Fujian Medical University, Zhangzhou, Fujian, China
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13
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Chen P, Chen X, Zhang H, Chen J, Lin M, Qian H, Gao F, Chen Y, Gong C, Zheng X, Zheng T. Dexmedetomidine Regulates Autophagy via the AMPK/mTOR Pathway to Improve SH-SY5Y-APP Cell Damage Induced by High Glucose. Neuromolecular Med 2023; 25:415-425. [PMID: 37017880 DOI: 10.1007/s12017-023-08745-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 03/25/2023] [Indexed: 04/06/2023]
Abstract
Neurodegenerative diseases and postoperative cognitive dysfunction involve the accumulation of β-amyloid peptide (Aβ). High glucose can inhibit autophagy, which facilitates intracellular Aβ clearance. The α2-adrenoreceptor agonist dexmedetomidine (DEX) can provide neuroprotection against several neurological diseases; however, the mechanism remains unclear. This study investigated whether DEX regulated autophagy via the AMPK/mTOR pathway to improve high glucose-induced neurotoxicity in SH-SY5Y/APP695 cells. SH-SY5Y/APP695 cells were cultured with high glucose with/without DEX. To examine the role of autophagy, the autophagy activator rapamycin (RAPA) and autophagy inhibitor 3-methyladenine (3-MA) were used. The selective AMPK inhibitor compound C was used to investigate the involvement of the AMPK pathway. Cell viability and apoptosis were examined by CCK-8 and annexin V-FITC/PI flow cytometric assays, respectively. Autophagy was analyzed by monodansylcadaverine staining of autophagic vacuoles. Autophagy- and apoptosis-related protein expression and the phosphorylation levels of AMPK/mTOR pathway molecules were quantified by western blotting. DEX pretreatment significantly suppressed high glucose-induced neurotoxicity in SH-SY5Y/APP695 cells, as evidenced by the enhanced viability, restoration of cellular morphology, and reduction in apoptotic cells. Furthermore, RAPA had a protective effect similar to that of DEX, but 3-MA eliminated the protective effect of DEX by promoting mTOR activation. Moreover, the AMPK/mTOR pathway was involved in DEX-mediated autophagy. Compound C significantly suppressed autophagy and reversed the protective effect of DEX against high glucose in SH-SY5Y/APP695 cells. Our findings demonstrated that DEX protected SH-SY5Y/APP695 cells against high glucose-induced neurotoxicity by upregulating autophagy through the AMPK/mTOR pathway, suggesting a role of DEX in treating POCD in diabetic patients.
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Affiliation(s)
- Pinzhong Chen
- Department of Anesthesiology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, No.134 Dong Street, Fuzhou, 350001, Fujian, People's Republic of China
| | - Xiaohui Chen
- Department of Anesthesiology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, No.134 Dong Street, Fuzhou, 350001, Fujian, People's Republic of China
| | - Honghong Zhang
- Department of Anesthesiology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, No.134 Dong Street, Fuzhou, 350001, Fujian, People's Republic of China
| | - Jianghu Chen
- Department of Anesthesiology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, No.134 Dong Street, Fuzhou, 350001, Fujian, People's Republic of China
| | - Mingxue Lin
- Department of Anesthesiology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, No.134 Dong Street, Fuzhou, 350001, Fujian, People's Republic of China
| | - Haitao Qian
- Department of Anesthesiology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, No.134 Dong Street, Fuzhou, 350001, Fujian, People's Republic of China
| | - Fei Gao
- Department of Anesthesiology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, No.134 Dong Street, Fuzhou, 350001, Fujian, People's Republic of China
| | - Yisheng Chen
- Center for Experimental Research in Clinical Medicine, Fujian Provincial Hospital, No.134 Dong Street, Fuzhou, 350001, Fujian, People's Republic of China
| | - Cansheng Gong
- Department of Anesthesiology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, No.134 Dong Street, Fuzhou, 350001, Fujian, People's Republic of China
| | - Xiaochun Zheng
- Department of Anesthesiology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, No.134 Dong Street, Fuzhou, 350001, Fujian, People's Republic of China.
- Fujian Emergency Medical Center, Fujian Provincial Key Laboratory of Emergency Medicine, Fujian Provincial Key Laboratory of Critical Medicine, Fujian Provincial Co-constructed Laboratory of "Belt and Road", Fuzhou, China.
| | - Ting Zheng
- Department of Anesthesiology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, No.134 Dong Street, Fuzhou, 350001, Fujian, People's Republic of China.
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14
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Deng H, Wu Y, Gao P, Kong D, Pan C, Xu S, Tang D, Jiao Y, Wen D, Yu W. Preoperative Pain Facilitates Postoperative Cognitive Dysfunction via Periaqueductal Gray Matter-Dorsal Raphe Circuit. Neuroscience 2023; 524:209-219. [PMID: 36958595 DOI: 10.1016/j.neuroscience.2023.03.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 03/09/2023] [Accepted: 03/15/2023] [Indexed: 03/25/2023]
Abstract
Postoperative cognitive dysfunction (POCD) is a medically induced, rapidly occurring postoperative disease, which is hard to recover and seriously threatens the quality of life, especially for elderly patients, so it is important to identify the risk factors for POCD and apply early intervention to prevent POCD. As we have known, pain can impair cognition, and many surgery patients experience different preoperative pain, but it is still unknown whether these patients are vulnerable for POCD. Here we found that chronic pain (7 days, but not 1 day acute pain) induced by Complete Freund's Adjuvant (CFA) injected in the hind paw of rats could easily induce spatial cognition and memory impairment after being exposed to sevoflurane anesthesia. Next, for the mechanisms, we focused on the Periaqueductal Gray Matter (PAG), a well-known pivotal nucleus in pain process. It was detected the existence of neural projection from ventrolateral PAG (vlPAG) to adjacent nucleus Dorsal Raphe (DR), the origin of serotonergic projection for the whole cerebrum, through virus tracing and patch clamp recordings. The Immunofluorescence staining and western blot results showed that Tryptophan Hydroxylase 2 (TPH2) for serotonin synthesis in the DR was increased significantly in the rats treated with CFA for 7 days and sevoflurane for 3 hours, while chemo-genetic inhibition of the vlPAG-DR projection induced obvious spatial learning and memory impairment. Our study suggests that preoperative chronic pain may facilitate cognitive function impairment after receiving anesthesia through the PAG-DR neural circuit, and preventative analgesia should be a considerable measure to reduce the incidence of POCD.
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Affiliation(s)
- Haoyue Deng
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, P.O. Box 200127, No. 160 Pujian Road, Shanghai, China; Key Laboratory of Anesthesiology (Shanghai Jiao Tong University), Ministry of Education, China
| | - Yi Wu
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, P.O. Box 200127, No. 160 Pujian Road, Shanghai, China; Key Laboratory of Anesthesiology (Shanghai Jiao Tong University), Ministry of Education, China
| | - Po Gao
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, P.O. Box 200127, No. 160 Pujian Road, Shanghai, China; Key Laboratory of Anesthesiology (Shanghai Jiao Tong University), Ministry of Education, China
| | - Dexu Kong
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, P.O. Box 200127, No. 160 Pujian Road, Shanghai, China; Key Laboratory of Anesthesiology (Shanghai Jiao Tong University), Ministry of Education, China
| | - Chao Pan
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, P.O. Box 200127, No. 160 Pujian Road, Shanghai, China; Key Laboratory of Anesthesiology (Shanghai Jiao Tong University), Ministry of Education, China
| | - Saihong Xu
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, P.O. Box 200127, No. 160 Pujian Road, Shanghai, China; Key Laboratory of Anesthesiology (Shanghai Jiao Tong University), Ministry of Education, China
| | - Dan Tang
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, P.O. Box 200127, No. 160 Pujian Road, Shanghai, China; Key Laboratory of Anesthesiology (Shanghai Jiao Tong University), Ministry of Education, China
| | - Yingfu Jiao
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, P.O. Box 200127, No. 160 Pujian Road, Shanghai, China; Key Laboratory of Anesthesiology (Shanghai Jiao Tong University), Ministry of Education, China.
| | - Daxiang Wen
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, P.O. Box 200127, No. 160 Pujian Road, Shanghai, China; Key Laboratory of Anesthesiology (Shanghai Jiao Tong University), Ministry of Education, China.
| | - Weifeng Yu
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, P.O. Box 200127, No. 160 Pujian Road, Shanghai, China; Key Laboratory of Anesthesiology (Shanghai Jiao Tong University), Ministry of Education, China.
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15
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Li X, Han X, Gao Y, Tang S, Yang Y, Zhang C, Ni X. Neuroprotective effects of different doses of Maresin1 pretreatment in aged rats after anesthesia/surgery. Neuroreport 2023; 34:348-356. [PMID: 36966805 PMCID: PMC10065824 DOI: 10.1097/wnr.0000000000001900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/01/2023] [Indexed: 03/28/2023]
Abstract
OBJECTIVE The study is to investigate the neuroprotective effect of different doses of Maresin1 pretreatment in aged rats after anesthesia/surgery and the related mechanisms. METHODS Aged male rats were randomly divided into a control group, an anesthesia/surgery group, and low, medium, and high-dose Maresin1 pretreatment groups, and the hippocampus was taken for study. The Morris water maze was performed to detect the cognitive ability of rats. Western blot and immunofluorescence were used to detect the expression of glial fibrillary acidic protein (GFAP) and central nervous system-specific protein (S100β). The ultrastructure of astrocytes was observed by a transmission electron microscope. Quantitative real-time PCR was used to detect the relative expression of IL-1β, IL-6, and TNF-α mRNA. RESULTS Compared with the control group, the cognition of rats in the anesthesia/surgery group was significantly reduced. The expression of astrocyte markers (GFAP and S100β) in the hippocampus of rats in the anesthesia/surgery group was increased. The levels of hippocampal inflammatory cytokines (TNF-α, IL-1β, and IL-6) were also higher in the anesthesia/surgery group than in the control group. After pretreatment with different doses of Maresin1, the cognitive impairment of rats was alleviated to varying degrees. Maresin1 pretreatment decreased the expression of astrocyte markers and inflammatory factors in the hippocampus of rats after anesthesia/surgery, and improve the microstructures of activated astrocytes, especially in the medium-dose group. CONCLUSION Pretreatment with Maresin1 (especially at medium-dose) showed neuroprotective effects in aged rats after anesthesia/surgery, which may be related to the inhibition of astrocyte activation.
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Affiliation(s)
- Xiuhua Li
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University
| | - Xu Han
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University
| | - Yubo Gao
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University
| | - Shaling Tang
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University
| | - Yanfang Yang
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University
| | - Chun Zhang
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Xinli Ni
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University
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Lv JM, Zhang LM, Wang JX, Shao JJ, Guo XG, Wang LY, Kang LQ, Zheng WC, Xin Y, Song RX, Guo W, Zhang DX. Abdominal surgery plus sevoflurane exposure induces abnormal emotional changes and cognitive dysfunction in aged rats. Behav Brain Res 2023; 442:114328. [PMID: 36740076 DOI: 10.1016/j.bbr.2023.114328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 01/26/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023]
Abstract
BACKGROUND Cognitive impairment, which includes perioperative psychological distress and cognitive dysfunction, can be determined by preoperative and post-operative neuropsychological tests. Several mechanisms have been proposed regarding the two-way communication between the immune system and the brain after surgery. We aimed to understand the mechanisms underlying perioperative neurocognitive disorders (PND) in elderly rats using an experimental abdominal surgery model. METHODS 24-month-old SD rats were exposed to the abdominal surgery model (AEL) under 3% anesthesia. On day 15 and day 30 post-surgery, fractional anisotropy (FA) using diffusion kurtosis imaging (DKI) was measured. From day 25 to day 30 post-surgery, behavioral tests, including open field test (OFT), Morris water maze (MWM), novel object recognition (NOR), force swimming test (FST), and elevated plus maze (EPM), were performed. Then, the rats were euthanized to perform pathological analysis and western blot measurement. RESULTS The rats exposed to AEL surgical treatment demonstrated significantly decreased time crossing the platform in the MWM, decreased recognition index in the NOR, reduced time in the open arm in the EPM, increased immobility time in the FST, and increased number of crossings in the OFT. Aged rats, after AEL exposure, further demonstrated decreased FA in the mPFC, nucleus accumbens (NAc), and hippocampus, together with reduced MAP2 intensity, attenuation of GAD65, VGlut2, CHAT, and phosphorylated P38MAPK expression, and increased reactive astrocytes and microglia. CONCLUSIONS In this study, the aged rats exposed to abdominal surgery demonstrated both emotional changes and cognitive dysfunction, which may be associated with neuronal degeneration and reduced phosphorylated P38MAPK.
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Affiliation(s)
- Jin-Meng Lv
- Department of Anesthesia and Trauma Research, Hebei Province Cangzhou Hospital of Integrated Traditional and Western Medicine, Cangzhou, China.
| | - Li-Min Zhang
- Department of Anesthesiology, Hebei Province Cangzhou Hospital of Integrated Traditional and Western Medicine, Cangzhou, China.
| | - Jie-Xia Wang
- Department of Anesthesiology, Cangzhou Central Hospital, Hebei Medical University, Cangzhou, China.
| | - Jing-Jing Shao
- Department of Anesthesiology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
| | - Xin-Gui Guo
- Department of Medical Iconography, Cangzhou Central Hospital, Hebei Medical University, Cangzhou, China.
| | - Lu-Ying Wang
- Department of Anesthesia and Trauma Research, Hebei Province Cangzhou Hospital of Integrated Traditional and Western Medicine, Cangzhou, China.
| | - Li-Qing Kang
- Department of Medical Iconography, Cangzhou Central Hospital, Hebei Medical University, Cangzhou, China.
| | - Wei-Chao Zheng
- Department of Anesthesiology, Hebei Province Cangzhou Hospital of Integrated Traditional and Western Medicine, Cangzhou, China.
| | - Yue Xin
- Department of Anesthesiology, Cangzhou Central Hospital, Hebei Medical University, Cangzhou, China.
| | - Rong-Xin Song
- Department of Anesthesiology, Cangzhou Central Hospital, Hebei Medical University, Cangzhou, China.
| | - Wei Guo
- Department of Orthopedics, Hebei Province Cangzhou Hospital of Integrated Traditional and Western Medicine, Cangzhou, China.
| | - Dong-Xue Zhang
- Department of Gerontology, Cangzhou Central Hospital, Cangzhou, China.
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Downregulation of Nrf2 in the Hippocampus Contributes to Postoperative Cognitive Dysfunction in Aged Rats by Sensitizing Oxidative Stress and Neuroinflammation. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2023; 2023:7272456. [PMID: 36819786 PMCID: PMC9935806 DOI: 10.1155/2023/7272456] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 01/15/2023] [Accepted: 01/24/2023] [Indexed: 02/11/2023]
Abstract
Postoperative cognitive dysfunction (POCD) is a recognized clinical complication defined by a new cognitive impairment arising after a surgical procedure. Elderly patients are especially vulnerable to cognitive impairment after surgical operations, but the underlying mechanisms remain elusive. Oxidative stress and neuroinflammation in the hippocampus, a brain region involved in memory formation, are considered as major contributors to the development of POCD. Activation of nuclear factor erythroid 2-related factor 2 (Nrf2), a master regulator of endogenous inducible defense system, plays a crucial role in protecting cells against oxidative stress and inflammation by enhancing transcription of antioxidant and anti-inflammatory target genes. Here, we examined whether aging downregulates Nrf2 in the hippocampus and, if so, whether downregulation of hippocampal Nrf2 contributes to POCD in aging. Young and aged rats underwent abdominal surgery or sham operation. One week later, cognitive function was assessed, and brains were collected for molecular studies. Compared with young sham rats, aged sham rats exhibited a significant reduction in expression of Nrf2 in the hippocampus. Interestingly, the expression of Nrf2 downstream target genes and levels of reactive oxygen species (ROS) and proinflammatory cytokines in the hippocampus as well as cognitive function were comparable between aged sham and young sham rats. After abdominal surgery, young rats showed significant upregulation of Nrf2 and its target genes in the hippocampus. However, aged rats did not show changes in expression of Nrf2 and its target genes but had increased levels of ROS and proinflammatory cytokines in the hippocampus, along with cognitive impairment as indicated by reduced contextual freezing time. Moreover, upregulation of hippocampal Nrf2 in aged rats with intracerebroventricular infusion of a Nrf2 activator reduced levels of ROS and proinflammatory cytokines in the hippocampus, ameliorating cognitive dysfunction after surgery. The results suggest that aging-induced downregulation of Nrf2 in the hippocampus causes the failure to activate Nrf2-regulated antioxidant defense system in response to surgical insult, which contributes to POCD by sensitizing oxidative stress and neuroinflammation. Nrf2 activation in the brain may be a novel strategy to prevent the cognitive decline in elderly patients after surgery.
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Koo JM, Chung YJ, Lee M, Moon YE. Efficacy of Dexmedetomidine vs. Remifentanil for Postoperative Analgesia and Opioid-Related Side Effects after Gynecological Laparoscopy: A Prospective Randomized Controlled Trial. J Clin Med 2023; 12:jcm12010350. [PMID: 36615151 PMCID: PMC9821299 DOI: 10.3390/jcm12010350] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/28/2022] [Accepted: 12/30/2022] [Indexed: 01/03/2023] Open
Abstract
Remifentanil is widely used for intraoperative analgesia, but often causes remifentanil-induced hyperalgesia (RIH) and related side effects. Dexmedetomidine, a non-opioid analgesic, has been used as an alternative to remifentanil to prevent RIH. We aimed to investigate the effect of dexmedetomidine on postoperative recovery after gynecological laparoscopy. Ninety-six adult patients undergoing elective gynecological laparoscopy were randomly assigned to the dexmedetomidine or remifentanil groups. The primary outcome was the pain score at 30 min after surgery. The secondary outcomes were intraoperative adverse events (hypotension and bradycardia) and postoperative opioid-related side effects (nausea, vomiting, requirement for rescue analgesics, and shivering). We also performed an ancillary cytokine study to evaluate oxidative stress, one of the causes of RIH. Compared with the remifentanil group, the dexmedetomidine group had lower pain scores at 30 min after surgery (4.0 ± 1.9 vs. 6.1 ± 2.0, mean ± SD, p < 0.001) and lower incidence of intraoperative hypotension and postoperative nausea, vomiting, and shivering. Furthermore, the proportion of patients requiring rescue analgesics was significantly lower in the dexmedetomidine than in the remifentanil group (25% vs. 66.7%, p < 0.001). Cytokine levels did not differ between the groups. Dexmedetomidine showed a better analgesic effect with minimal opioid-related side effects and is considered superior to remifentanil for intraoperative analgesia.
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Affiliation(s)
- Jung Min Koo
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Youn-Jee Chung
- Department of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Mihyeon Lee
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Young Eun Moon
- Department of Anesthesiology and Pain Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
- Correspondence: ; Tel.: +82-2-2258-6163; Fax: +82-2-2357-1951
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19
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Qiu Y, Mo C, Xu S, Chen L, Ye W, Kang Y, Chen G, Zhu T. Research progress on perioperative blood-brain barrier damage and its potential mechanism. Front Cell Dev Biol 2023; 11:1174043. [PMID: 37101615 PMCID: PMC10124715 DOI: 10.3389/fcell.2023.1174043] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 03/28/2023] [Indexed: 04/28/2023] Open
Abstract
The blood-brain barrier (BBB) is an important barrier separating the central nervous system from the periphery. The composition includes endothelial cells, pericytes, astrocytes, synapses and tight junction proteins. During the perioperative period, anesthesia and surgical operations are also a kind of stress to the body, which may be accompanied by blood-brain barrier damage and brain metabolism dysfunction. Perioperative blood-brain barrier destruction is closely associated with cognitive impairment and may increase the risk of postoperative mortality, which is not conducive to enhanced recovery after surgery. However, the potential pathophysiological process and specific mechanism of blood-brain barrier damage during the perioperative period have not been fully elucidated. Changes in blood-brain barrier permeability, inflammation and neuroinflammation, oxidative stress, ferroptosis, and intestinal dysbiosis may be involved in blood-brain barrier damage. We aim to review the research progress of perioperative blood-brain barrier damage and its potential adverse effects and potential molecular mechanisms, and provide ideas for the study of homeostasis maintenance of brain function and precision anesthesia.
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Affiliation(s)
- Yong Qiu
- Department of Anesthesiology, National Clinical Research Center for Geriatrics and The Research Units of West China (2018RU012), West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Anesthesia and Critical Care Medicine, National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
| | - Chunheng Mo
- Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Shiyu Xu
- Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Lu Chen
- Department of Anesthesiology, National Clinical Research Center for Geriatrics and The Research Units of West China (2018RU012), West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Anesthesia and Critical Care Medicine, National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
| | - Wanlin Ye
- Department of Anesthesiology, National Clinical Research Center for Geriatrics and The Research Units of West China (2018RU012), West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Anesthesia and Critical Care Medicine, National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
| | - Yi Kang
- Department of Anesthesiology, National Clinical Research Center for Geriatrics and The Research Units of West China (2018RU012), West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Anesthesia and Critical Care Medicine, National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
| | - Guo Chen
- Department of Anesthesiology, National Clinical Research Center for Geriatrics and The Research Units of West China (2018RU012), West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Anesthesia and Critical Care Medicine, National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
- *Correspondence: Guo Chen, ; Tao Zhu,
| | - Tao Zhu
- Department of Anesthesiology, National Clinical Research Center for Geriatrics and The Research Units of West China (2018RU012), West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Anesthesia and Critical Care Medicine, National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
- *Correspondence: Guo Chen, ; Tao Zhu,
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Wu T, Li M, Tian L, Cong P, Huang X, Wu H, Zhang Q, Zhang H, Xiong L. A modified mouse model of perioperative neurocognitive disorders exacerbated by sleep fragmentation. Exp Anim 2023; 72:55-67. [PMID: 36130912 PMCID: PMC9978123 DOI: 10.1538/expanim.22-0053] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Aging is one of the greatest risk factors for postoperative cognitive dysfunction (POCD), also known as perioperative neurocognitive disorder (PND). Animal models of PND are usually induced in mice over 18 months of age, which imposes expensive economic and time costs for PND-related studies. Sleep disorders, including sleep fragmentation, are reported to aggravate memory impairment in neurocognitive-related diseases such as Alzheimer's disease (AD). Therefore, the aim of the present study was to explore whether a PND model could be constructed in younger mice with the help of fragmented sleep. We found that fragmented sleep followed by laparotomy under isoflurane anesthesia could stably induce PND in 15-month-old mice. To determine whether the neurocognitive decline in this model could be salvaged by clinical treatments, we administered repetitive transcranial magnetic stimulation (rTMS) to the model mice before anesthesia and surgery. We found that 10 days of high-frequency rTMS (HF-rTMS) could improve spatial learning and memory deficits in this modified PND model. We are the first to successfully construct a PND model in younger mice,which is more economical, that can be used as an alternative model for future PND studies.
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Affiliation(s)
- Tingmei Wu
- Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Department of
Anesthesiology and Perioperative Medicine, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, 1279 Sanmen Road, Hongkou District, Shanghai 200434, P.R.
China
| | - Min Li
- Department of Rehabilitation Medicine, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, 1279 Sanmen Road, Hongkou District,
Shanghai 200434, P.R. China
| | - Li Tian
- Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Department of
Anesthesiology and Perioperative Medicine, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, 1279 Sanmen Road, Hongkou District, Shanghai 200434, P.R.
China
| | - Peilin Cong
- Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Department of
Anesthesiology and Perioperative Medicine, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, 1279 Sanmen Road, Hongkou District, Shanghai 200434, P.R.
China
| | - Xinwei Huang
- Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Department of
Anesthesiology and Perioperative Medicine, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, 1279 Sanmen Road, Hongkou District, Shanghai 200434, P.R.
China
| | - Huanghui Wu
- Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Department of
Anesthesiology and Perioperative Medicine, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, 1279 Sanmen Road, Hongkou District, Shanghai 200434, P.R.
China
| | - Qian Zhang
- Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Department of
Anesthesiology and Perioperative Medicine, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, 1279 Sanmen Road, Hongkou District, Shanghai 200434, P.R.
China
| | - Hong Zhang
- Department of Rehabilitation Medicine, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, 1279 Sanmen Road, Hongkou District,
Shanghai 200434, P.R. China
| | - Lize Xiong
- Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Department of
Anesthesiology and Perioperative Medicine, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, 1279 Sanmen Road, Hongkou District, Shanghai 200434, P.R.
China
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Jian R, He X. TIPE2 knockdown exacerbates isoflurane-induced postoperative cognitive impairment in mice by inducing activation of STAT3 and NF-κB signaling pathways. Transl Neurosci 2023; 14:20220282. [PMID: 37069964 PMCID: PMC10105556 DOI: 10.1515/tnsci-2022-0282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 03/07/2023] [Accepted: 03/13/2023] [Indexed: 04/19/2023] Open
Abstract
Objective Anesthetic exposure causes learning and memory impairment, the mechanisms of which remain unknown. It has been reported that tumor necrosis factor-α-inducer protein 8-like 2 (TIPE2) is a newly discovered immune negative regulator that is essential for maintaining immune homeostasis. This study aimed to examine the role of TIPE2 in isoflurane-induced postoperative cognitive decline (POCD). Methods An AAV empty vector and AAV shTIPE2 vector for the knockdown of TIPE2 were injected into the dorsal hippocampus of mice. Mice were continuously exposed to 1.5% isoflurane followed by abdominal exploration. Behavioral tests including the open field test and fear conditioning test were performed on the third and fourth day post-operation. Apoptosis was detected by terminal deoxynucleotidyl-transferase-mediated dUTP nick end labeling staining. The kits were used to detect the activity of antioxidant enzymes. Inflammatory cytokine levels were detected by enzyme-linked immunosorbent assay. Signal transducer and activator of transcription 3 (STAT3) and nuclear factor-κB (NF-κB) signaling pathway activities were detected by western blotting. Results TIPE2 expression increased after isoflurane anesthesia and surgery. TIPE2 deficiency aggravated cognitive impairment in mice and further caused apoptosis and oxidative stress in hippocampal neurons. TIPE2 deficiency induced microglial activation and increased secretion of proinflammatory cytokines. In addition, TIPE2 deficiency promoted STAT3 and NF-κB signaling activation induced by isoflurane anesthesia and after surgery. Conclusion TIPE2 may play a neuroprotective role in POCD by regulating STAT3 and NF-κB pathways.
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Affiliation(s)
- Rui Jian
- Department of Rehabilitation Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Xin He
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, No. 87, Xiangya Road, Kaifu District, Changsha, Hunan, 410008, China
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Cheng C, Wan H, Cong P, Huang X, Wu T, He M, Zhang Q, Xiong L, Tian L. Targeting neuroinflammation as a preventive and therapeutic approach for perioperative neurocognitive disorders. J Neuroinflammation 2022; 19:297. [PMID: 36503642 PMCID: PMC9743533 DOI: 10.1186/s12974-022-02656-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 11/23/2022] [Indexed: 12/14/2022] Open
Abstract
Perioperative neurocognitive disorders (PND) is a common postoperative complication associated with regional or general anesthesia and surgery. Growing evidence in both patient and animal models of PND suggested that neuroinflammation plays a critical role in the development and progression of this problem, therefore, mounting efforts have been made to develop novel therapeutic approaches for PND by targeting specific factors or steps alongside the neuroinflammation. Multiple studies have shown that perioperative anti-neuroinflammatory strategies via administering pharmacologic agents or performing nonpharmacologic approaches exert benefits in the prevention and management of PND, although more clinical evidence is urgently needed to testify or confirm these results. Furthermore, long-term effects and outcomes with respect to cognitive functions and side effects are needed to be observed. In this review, we discuss recent preclinical and clinical studies published within a decade as potential preventive and therapeutic approaches targeting neuroinflammation for PND.
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Affiliation(s)
- Chun Cheng
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, 200434 China ,grid.24516.340000000123704535Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People’s Hospital, School of Medicine, Tongji University, Shanghai, 200434 China ,grid.24516.340000000123704535Clinical Research Center for Anesthesiology and Perioperative Medicine, Tongji University, Shanghai, 200434 China
| | - Hanxi Wan
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, 200434 China ,grid.24516.340000000123704535Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People’s Hospital, School of Medicine, Tongji University, Shanghai, 200434 China ,grid.24516.340000000123704535Clinical Research Center for Anesthesiology and Perioperative Medicine, Tongji University, Shanghai, 200434 China
| | - Peilin Cong
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, 200434 China ,grid.24516.340000000123704535Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People’s Hospital, School of Medicine, Tongji University, Shanghai, 200434 China ,grid.24516.340000000123704535Clinical Research Center for Anesthesiology and Perioperative Medicine, Tongji University, Shanghai, 200434 China
| | - Xinwei Huang
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, 200434 China ,grid.24516.340000000123704535Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People’s Hospital, School of Medicine, Tongji University, Shanghai, 200434 China ,grid.24516.340000000123704535Clinical Research Center for Anesthesiology and Perioperative Medicine, Tongji University, Shanghai, 200434 China
| | - Tingmei Wu
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, 200434 China ,grid.24516.340000000123704535Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People’s Hospital, School of Medicine, Tongji University, Shanghai, 200434 China ,grid.24516.340000000123704535Clinical Research Center for Anesthesiology and Perioperative Medicine, Tongji University, Shanghai, 200434 China
| | - Mengfan He
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, 200434 China ,grid.24516.340000000123704535Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People’s Hospital, School of Medicine, Tongji University, Shanghai, 200434 China ,grid.24516.340000000123704535Clinical Research Center for Anesthesiology and Perioperative Medicine, Tongji University, Shanghai, 200434 China
| | - Qian Zhang
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, 200434 China ,grid.24516.340000000123704535Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People’s Hospital, School of Medicine, Tongji University, Shanghai, 200434 China ,grid.24516.340000000123704535Clinical Research Center for Anesthesiology and Perioperative Medicine, Tongji University, Shanghai, 200434 China
| | - Lize Xiong
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, 200434 China ,grid.24516.340000000123704535Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People’s Hospital, School of Medicine, Tongji University, Shanghai, 200434 China ,grid.24516.340000000123704535Clinical Research Center for Anesthesiology and Perioperative Medicine, Tongji University, Shanghai, 200434 China
| | - Li Tian
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, 200434 China ,grid.24516.340000000123704535Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People’s Hospital, School of Medicine, Tongji University, Shanghai, 200434 China ,grid.24516.340000000123704535Clinical Research Center for Anesthesiology and Perioperative Medicine, Tongji University, Shanghai, 200434 China
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Shen Q, Jiang Y, Jia X, Zhou X, Zhou QH. Amelioratory Effect of Melatonin on Cognition Dysfunction Induced by Sevoflurane Anesthesia in Aged Mice. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2022; 21:e133971. [PMID: 36896324 PMCID: PMC9990511 DOI: 10.5812/ijpr-133971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 12/31/2022] [Accepted: 01/05/2023] [Indexed: 01/26/2023]
Abstract
Background Postoperative cognitive dysfunction (POCD) can be described as a clinical phenomenon characterized by cognitive impairment in patients, particularly elderly patients, after anesthesia and surgery. Researchers have focused on the probable effect of general anesthesia drugs on cognitive functioning status in older adults. Melatonin is an indole-type neuroendocrine hormone with broad biological activity and potent anti-inflammatory, anti-apoptotic, and neuroprotective effects. This study investigated the effects of melatonin on cognitive behavior in aged mice anesthetized with sevoflurane. In addition, melatonin's molecular mechanism was determined. Objectives This study aimed to investigate the mechanisms of melatonin against sevoflurane-induced neurotoxicity. Methods A total of 94 aged C57BL/6J mice were categorized into different groups, namely control (control + melatonin (10 mg/kg)), sevoflurane (sevoflurane + melatonin (10 mg/kg)), sevoflurane + melatonin (10 mg/kg) + phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) inhibitor LY294002 (30 mg/kg), and sevoflurane + melatonin (10 mg/kg) + mammalian target of rapamycin (mTOR) inhibitor (10 mg/kg). The open field and Morris water maze tests were utilized to assess the neuroprotective effects of melatonin on sevoflurane-induced cognitive impairment in aged mice. The expression levels of the apoptosis-linked proteins, PI3K/Akt/mTOR signaling pathway, and pro-inflammatory cytokines in the brain's hippocampus region were determined using the Western blotting technique. The apoptosis of the hippocampal neurons was observed using the hematoxylin and eosin staining technique. Results Neurological deficits in aged, sevoflurane-exposed mice were significantly decreased after melatonin treatment. Mechanistically, melatonin treatment restored sevoflurane-induced down-regulated PI3K/Akt/mTOR expression and significantly attenuated sevoflurane-induced apoptotic cells and neuroinflammation. Conclusions The findings of this study have highlighted the neuroprotective effect of melatonin on sevoflurane-induced cognitive impairment via regulating the PI3K/Akt/mTOR pathway, which might be effective in the clinical treatment of elderly patients with anesthesia-induced POCD.
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Affiliation(s)
- Qihong Shen
- Department of Anesthesiology, Affiliated Hospital of Jiaxing University, Jiaxing, China
| | - Yanyu Jiang
- Department of Anesthesia Medicine, Bengbu Medical College, Bengbu, China
| | - Xiaoyu Jia
- Department of Anesthesiology, Affiliated Hospital of Jiaxing University, Jiaxing, China
| | - Xuyan Zhou
- Department of Anesthesiology, Affiliated Hospital of Jiaxing University, Jiaxing, China
| | - Qing-he Zhou
- Department of Anesthesiology, Affiliated Hospital of Jiaxing University, Jiaxing, China
- Corresponding Author: Department of Anesthesiology, Affiliated Hospital of Jiaxing University, Jiaxing, China.
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Jiang L, Dong R, Xu M, Liu Y, Xu J, Ma Z, Xia T, Gu X. Inhibition of the integrated stress response reverses oxidative stress damage-induced postoperative cognitive dysfunction. Front Cell Neurosci 2022; 16:992869. [PMID: 36212697 PMCID: PMC9534309 DOI: 10.3389/fncel.2022.992869] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 08/29/2022] [Indexed: 11/29/2022] Open
Abstract
Postoperative cognitive dysfunction (POCD) is a common complication following anesthesia and surgery that might lead to a decline in learning and memory. Oxidative stress damage is one of the pathogenic mechanisms underlying POCD. Recent studies had shown that the integrated stress response (ISR) is closely related to oxidative stress. The core response of the ISR is phosphorylation of eIF2α. Various cellular stress stimuli trigger activation of eIF2α kinases, thus causing phosphorylation of eIF2α. ISR is associated with many neurodegenerative diseases; however, the relationship between POCD and ISR has not been defined. In the present study, the tibias in 4-month-old male C57BL/6 mice were fractured under isoflurane anesthesia to establish the POCD animal model. Cognitive function was assessed by fear conditioning tests and the Y-maze from 3 to 14 days post-surgery. Western blot was used to determine the levels of PeIF2α, eIF2α, ATF4, GADD34, CHOP, BDNF, proBDNF, and p-NR2B expression. The levels of reactive oxygen species (ROS), superoxide dismutase (SOD), and malondialdehyde (MDA) were measured to determine oxidative stress in hippocampal tissues. After tibial fracture surgery in mice, the hippocampus had increased levels of PeIF2α, ATF4, GADD34, and CHOP protein, ROS-positive cells, and average fluorescence intensity, SOD activity was decreased, and the MDA level was increased. The ISR inhibitor, ISRIB, reduced the levels of PeIF2α, ATF4, GADD34, and CHOP protein, and alleviated oxidative stress in the hippocampus of POCD mice. Moreover, ISRIB ameliorated cognitive dysfunction in POCD mice. Our findings suggested that targeting ISR may represent an effective approach to combat POCD.
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Affiliation(s)
- Linhao Jiang
- Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical School of Nanjing University, Nanjing, China
- Medical School, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, China
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Rui Dong
- Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical School of Nanjing University, Nanjing, China
- Medical School, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, China
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Minhui Xu
- Medical School, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, China
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Yujia Liu
- Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical School of Nanjing University, Nanjing, China
- Medical School, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, China
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Jiyan Xu
- Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical School of Nanjing University, Nanjing, China
- Medical School, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, China
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Zhengliang Ma
- Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical School of Nanjing University, Nanjing, China
- *Correspondence: Xiaoping Gu Tianjiao Xia Zhengliang Ma
| | - Tianjiao Xia
- Medical School, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory of Molecular Medicine, Nanjing University, Nanjing, China
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
- *Correspondence: Xiaoping Gu Tianjiao Xia Zhengliang Ma
| | - Xiaoping Gu
- Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical School of Nanjing University, Nanjing, China
- *Correspondence: Xiaoping Gu Tianjiao Xia Zhengliang Ma
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Li G, Zhou J, Wei J, Liu B. Dexmedetomidine Ameliorated Cognitive Dysfunction Induced by Intestinal Ischemia Reperfusion in Mice with Possible Relation to the Anti-inflammatory Effect Through the Locus Coeruleus Norepinephrine System. Neurochem Res 2022; 47:3440-3453. [PMID: 35945306 PMCID: PMC9546995 DOI: 10.1007/s11064-022-03706-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 07/13/2022] [Accepted: 07/19/2022] [Indexed: 11/29/2022]
Abstract
Cognitive impairment is a common central nervous system complication that occurs following surgery or organs damage outside the nervous system. Neuroinflammation plays a key role in the molecular mechanisms of cognitive impairment. Dexmedetomidine alleviates neuroinflammation and reduces cognitive dysfunction incidence; however, the mechanism by which dexmedetomidine alleviates cognitive dysfunction remains unclear. This study evaluated the effect of dexmedetomidine on attenuation of early cognitive impairment induced by intestinal ischemia–reperfusion in mice and examined whether the locus coeruleus norepinephrine (LCNE) system participates in the anti-inflammatory effect of dexmedetomidine. The superior mesenteric artery was clamped for 45 min to induce intestinal ischemia reperfusion injury. Dexmedetomidine alone or combined with DSP-4, a selective locus coeruleus noradrenergic neurotoxin, was used for pretreatment. Postoperative cognition was assessed using the Morris water maze. Serum and hippocampal levels of IL-1β, TNF-α, norepinephrine (NE), and malondialdehyde (MDA) were assessed by enzyme-linked immunosorbent assay. Immunofluorescence, immunohistochemistry, and hematoxylin and eosin staining were used to evaluate the expression of tyrosine hydroxylase (TH) in the locus coeruleus, hippocampal microglia, and intestinal injury. Pretreatment with dexmedetomidine alleviated intestinal injury and decreased the serum and hippocampal levels of NE, IL-1β, TNF-α, and MDA at 24 h after intestinal ischemia reperfusion, decreased TH-positive neurons in the locus coeruleus, and ameliorated cognitive impairment. Similarly, DSP-4 pre-treatment alleviated neuroinflammation and improved cognitive function. Furthermore, α2-adrenergic receptor antagonist atipamezole or yohimbine administration diminished the neuroprotective effects and improved cognitive function with dexmedetomidine. Therefore, dexmedetomidine attenuated early cognitive dysfunction induced by intestinal ischemia–reperfusion injury in mice, which may be related to its anti-inflammatory effects through the LCNE system.
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Affiliation(s)
- Gang Li
- Department of Anesthesiology, West China Hospital of Sichuan University, Chengdu, China
- Department of Anesthesiology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jun Zhou
- Department of Anesthesiology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jicheng Wei
- Department of Anesthesiology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Bin Liu
- Department of Anesthesiology, West China Hospital of Sichuan University, Chengdu, China.
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Wang J, Xin Y, Chu T, Liu C, Xu A. Dexmedetomidine attenuates perioperative neurocognitive disorders by suppressing hippocampal neuroinflammation and HMGB1/RAGE/NF-κB signaling pathway. Biomed Pharmacother 2022; 150:113006. [PMID: 35486975 DOI: 10.1016/j.biopha.2022.113006] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 04/17/2022] [Accepted: 04/19/2022] [Indexed: 11/02/2022] Open
Abstract
Surgical trauma can induce an inflammatory response in the central nervous system. Neuroinflammation is a crucial pathological mechanism of perioperative neurocognitive disorders (PND). Dexmedetomidine (Dex) is an alpha (α)-2 adrenoceptor agonist that is widely used in the perioperative period. Previous studies have shown that Dex has neuroprotection in various nerve injury models, but its role in PND remains unclear. Our study aimed to observe the neuroprotective effect of Dex pretreatment on postoperative cognitive change and explore the effects of hippocampal neuroinflammation, microglial polarization and HMGB1/RAGE/NF-κB signaling pathway involved in Dex on PND in rats. Rats were pretreated with Dex alone or in combination with yohimbine (α-2 adrenoceptor antagonist) before surgery. Behavioral tests results showed that Dex ameliorated surgery-induced cognitive impairment in rats. Nissl, immunohistochemistry and TUNEL-NeuN staining results indicated that Dex reduced hippocampus damage and neuronal apoptosis caused by surgery. Dex preconditioning reduced the expression of the proinflammatory cytokines IL-1β, TNF-α and IL-6 in hippocampus. Immunohistochemical and immunofluorescence results showed that Dex preconditioning inhibited the activation of glial cells induced by surgery. Western blot analysis showed that Dex preconditioning downregulated the expression of M1 phenotype markers (CD86 and iNOS), HMGB1, RAGE and nuclear NF-κB and upregulated the expression of M2 phenotype markers (Arginase 1 and CD206) and cytoplasmic NF-κB. Yohimbine could inhibit the neuroprotective effect of Dex. These results indicated that Dex pretreatment could improve postoperative short-term cognitive impairment, and the neuroprotective mechanism may involve the suppression of hippocampal neuroinflammation, regulation of M1/M2 polarization, and inhibition of HMGB1/RAGE/NF-κB signal transduction.
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Affiliation(s)
- Jinxu Wang
- Department of Anesthesiology and Pain Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yueyang Xin
- Department of Anesthesiology and Pain Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Tiantian Chu
- Department of Anesthesiology and Pain Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Cheng Liu
- Department of Anesthesiology and Pain Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Aijun Xu
- Department of Anesthesiology and Pain Medicine, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430030, China.
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Electro-Acupuncture Pretreatment Ameliorates Anesthesia and Surgery-Induced Cognitive Dysfunction Via Inhibiting Mitochondrial Injury and nEuroapoptosis in Aged Rats. Neurochem Res 2022; 47:1751-1764. [PMID: 35258777 DOI: 10.1007/s11064-022-03567-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 02/24/2022] [Accepted: 02/28/2022] [Indexed: 12/30/2022]
Abstract
Postoperative cognitive dysfunction (POCD) remains one of the most common complications following anesthesia and surgery (AS) in the elderly population. Calcium-mediated mitochondrial injury has been proved to induce cognitive impairment in a variety of neurologic diseases. In the current study we determined whether electro-acupuncture (EA) pretreatment ameliorated AS-induced POCD in aged rats, as well as the underlying mechanism. Eighty SD rats (18 months, male) were randomly assigned into four groups (n = 20): C, C + EA, POCD and EA + POCD. Rats in Group POCD and EA + POCD were subjected to exploratory laparotomy under sevoflurane anesthesia. Rats of Group C + EA and EA + POCD received a 5-day EA stimulation at Hegu, Neiguan and Zusanli acupoints before AS. At 3rd day after AS, open field test along with Morris water maze test were employed to examine the cognitive function of aged rats. Then hippocampal tissues were stripped and hippocampal neuronal amount, expression level of cleaved caspase-9 level, cytochrome c (Cyt C), cleaved caspase-3 level, Bcl-2, Bax, ROS expression level, apoptosis rate, mitochondrial membrane potential (MMP), cytosolic calcium concentration ([Ca2+]c), opening level of mitochondrial permeability transition pore (mPTP) and ultrastructure of hippocampal neurons were detected separately. EA pretreatment inhibited AS-induced cognitive dysfunction. Furthermore, EA pretreatment decreased level of [Ca2+]c, MMP, mPTP, ROS and hippocampal mitochondrial disruption and enhanced neuronal amount. In addition, EA pretreatment notably reduced the AS-induced increased level of cleaved caspase-9, cleaved caspase-3 and expression of Cyt c, Bax/Bcl-2 ratio, as well as neuronal apoptosis rate in aged rats. EA pretreatment ameliorates AS-induced POCD in aged rats, the potential mechanism may be associated with inhibiting calcium overload and ameliorating mitochondrial injury and neuroapoptosis in hippocampal neurons.
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Dexmedetomidine Mitigates Microglial Activation Associated with Postoperative Cognitive Dysfunction by Modulating the MicroRNA-103a-3p/VAMP1 Axis. Neural Plast 2022; 2022:1353778. [PMID: 35494481 PMCID: PMC9042642 DOI: 10.1155/2022/1353778] [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: 11/02/2021] [Accepted: 03/29/2022] [Indexed: 11/17/2022] Open
Abstract
Surgery-induced microglial activation is critical in mediating postoperative cognitive dysfunction (POCD) in elderly patients, where the important protective effect of dexmedetomidine has been indicated. However, the mechanisms of action of dexmedetomidine during the neuroinflammatory response that underlies POCD remain largely unknown. We found that lipopolysaccharide (LPS) induced substantial inflammatory responses in primary and BV2 microglial cells. The screening of differentially expressed miRNAs revealed that miR-103a-3p was downregulated in these cell culture models. Overexpression of miR-103a-3p mimics and inhibitors suppressed and enhanced the release of inflammatory factors, respectively. VAMP1 expression was upregulated in LPS-treated primary and BV-2 microglial cells, and it was validated as a downstream target of miR-103-3p. VAMP1-knockdown significantly inhibited the LPS-induced inflammatory response. Dexmedetomidine treatment markedly inhibited LPS-induced inflammation and the expression of VAMP1, and miR-103a-3p expression reversed this inhibition. Moreover, dexmedetomidine mitigated microglial activation and the associated inflammatory response in a rat model of surgical trauma that mimicked POCD. In this model, dexmedetomidine reversed miR-103a-3p and VAMP1 expression; this effect was abolished by miR-103a-3p overexpression. Taken together, the data show that miR-103a-3p/VAMP1 is critical for surgery-induced microglial activation of POCD.
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Tang Q, Guo Q, Li K, Fei F. VRT-043198 Ameliorates Surgery-Induced Neurocognitive Disorders by Restoring the NGF and BNDF Expression in Aged Mice. Neuropsychiatr Dis Treat 2022; 18:1027-1037. [PMID: 35607505 PMCID: PMC9123246 DOI: 10.2147/ndt.s364250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 05/06/2022] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Perioperative neurocognitive disorders (PND) are common surgical complications in the elderly. Pyroptosis-associated inflammation has been suggested to participate in a series of neurocognitive diseases, including Alzheimer's disease. Given that VRT-043198 can reportedly inhibit caspase-1-induced pyroptosis, this study sought to determine whether VRT-043198 reduced PND in a mouse model following abdominal exploratory laparotomy. METHODS 20-month-old male C57/BL mice were used to establish an abdominal exploratory laparotomy (AEL) model of PND. VRT-043198 (1, 10 and 100 mg/kg) was administered intraperitoneally immediately after surgery. Thirty days post-surgery, the mice were evaluated in the Morris water maze test. Their number of neurons, neurotrophin nerve growth factor (NGF) levels and brain-derived neurotrophic factor (BDNF) were measured. In the hippocampus, A1-type astrocytes and M1-type microglia were assessed using an immunofluorescence assay and Western blot, respectively. Caspase-1 activity, IL-1β, IL-18, and PPAR-γ were also measured 24h after surgery. RESULTS VRT-043198 administration increased the time to cross the platform and increased the ratio of distance and time in the targeted quadrant after surgery. Furthermore, it was found that VRT-043198 restored neuronal amount, increased NGF and BDNF and decreased the number of A1-type astrocytes and M1-type microglia. VRT-043198 also attenuated caspase-1 activity, downregulated IL-1β and IL-18, but increased PPAR-γ 24h post-surgery. CONCLUSION VRT-043198 improved PND in aged mice after abdominal exploratory laparotomy by restoring the NGF and BNDF expression. These results indicate that VRT-043198 may be a potential therapy for PND.
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Affiliation(s)
- Qi Tang
- Department of Anesthesiology, First People's Hospital of Taicang, Soochow University, Suzhou, Jiangsu Province, People's Republic of China
| | - Qiang Guo
- Department of Anesthesiology, First People's Hospital of Taicang, Soochow University, Suzhou, Jiangsu Province, People's Republic of China
| | - Ke Li
- Department of Anesthesiology, First People's Hospital of Taicang, Soochow University, Suzhou, Jiangsu Province, People's Republic of China
| | - Fan Fei
- Department of Anesthesiology, First People's Hospital of Taicang, Soochow University, Suzhou, Jiangsu Province, People's Republic of China
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