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Huang Y, Yang D, Liao S, Guan X, Zhou F, Liu Y, Wang Y, Zhang Y. Ginsenoside Rg1 protects the blood-brain barrier and myelin sheath to prevent postoperative cognitive dysfunction in aged mice. Neuroreport 2024; 35:925-935. [PMID: 39166417 DOI: 10.1097/wnr.0000000000002083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2024]
Abstract
In this study, the postoperative cognitive dysfunction (POCD) mouse model was established to observe the changes in inflammation, blood-brain barrier permeability, and myelin sheath, and we explore the effect of ginsenoside Rg1 pretreatment on improving POCD syndrome. The POCD model of 15- to 18-month-old mice was carried out with internal fixation of tibial fractures under isoflurane anesthesia. Pretreatment was performed by continuous intraperitoneal injection of ginsenoside Rg1(40 mg/kg/day) for 14 days before surgery. The cognitive function was detected by the Morris water maze. The contents of interleukin-1β and tumor necrosis factor-α in the hippocampus, cortex, and serum were detected by ELISA. The permeability of blood-brain barrier was observed by Evans blue. The mRNA levels and protein expression levels of 2',3'-cyclic nucleotide 3'-phosphodiesterase (CNPase), myelin basic protein (MBP), beta-catenin, and cyclin D1 in the hippocampus were analyzed by quantitative PCR and western blotting. The protein expression levels of ZO-1 and Wnt1 in the hippocampus were analyzed by western blotting. Finally, the localizations of CNPase and MBP in the hippocampus were detected by immunofluorescence. Ginsenoside Rg1 can prevent POCD, peripheral and central inflammation, and blood-brain barrier leakage, and reverse the downregulation of ZO-1, CNPase, MBP, and Wnt pathway-related molecules in aged mice. Preclinical studies suggest that ginsenoside Rg1 improves postoperative cognitive function in aged mice by protecting the blood-brain barrier and myelin sheath, and its specific mechanism may be related to the Wnt/β-catenin pathway.
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Affiliation(s)
- Yao Huang
- Department of Anesthesiology, The Affiliated Hospital, Southwest Medical University
- Department of Anesthesiology, The Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University
| | - Dianping Yang
- Department of Anesthesiology, The Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University
| | - Sijing Liao
- Department of Anesthesiology, The Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University
| | - Xilin Guan
- Department of Anesthesiology, The Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University
| | - Feiran Zhou
- Department of Pain, The Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University
| | - Yan Liu
- Department of Anesthesiology, The Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University
| | - Yong Wang
- Department of Anesthesiology, The Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University
| | - Ying Zhang
- Department of Anesthesiology, The Affiliated Hospital, Southwest Medical University
- Department of Anesthesiology, The Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University
- Department of Anesthesiology, Heiiang Hospital of Traditional Chinese Medicine, Southwest Medical University, Luzhou, Sichuan Province, China
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Li M, Cheng J, He R, Chen K, Zhang J, Liu X, Hu J, Lu Y. Red light-induced localized release of carbon monoxide for alleviating postoperative cognitive dysfunction. Biomaterials 2024; 312:122744. [PMID: 39106820 DOI: 10.1016/j.biomaterials.2024.122744] [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: 04/07/2024] [Revised: 07/12/2024] [Accepted: 08/01/2024] [Indexed: 08/09/2024]
Abstract
Inflammation within the central nervous system (CNS), which may be triggered by surgical trauma, has been implicated as a significant factor contributing to postoperative cognitive dysfunction (POCD). The relationship between mitigating inflammation at peripheral surgical sites and its potential to attenuate the CNS inflammatory response, thereby easing POCD symptoms, remains uncertain. Notably, carbon monoxide (CO), a gasotransmitter, exhibits pronounced anti-inflammatory effects. Herein, we have developed carbon monoxide-releasing micelles (CORMs), a nanoparticle that safely and locally liberates CO upon exposure to 650 nm light irradiation. In a POCD mouse model, treatment with CORMs activated by light (CORMs + hv) markedly reduced the concentrations of interleukin (IL)-6, IL-1β, and tumor necrosis factor-alpha (TNF-α) in both the peripheral blood and the hippocampus, alongside a decrease in ionized calcium-binding adapter molecule 1 in the hippocampal CA1 region. Furthermore, CORMs + hv treatment diminished Evans blue extravasation, augmented the expression of tight junction proteins zonula occludens-1 and occludin, enhanced neurocognitive functions, and fostered fracture healing. Bioinformatics analysis and experimental validation has identified Htr1b and Trhr as potential key regulators in the neuroactive ligand-receptor interaction signaling pathway implicated in POCD. This work offers new perspectives on the mechanisms driving POCD and avenues for therapeutic intervention.
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Affiliation(s)
- Mingde Li
- Department of Anesthesiology, The First Affiliated Hospital of Anhui Medical University, Key Laboratory of Anesthesia and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei 230022, China
| | - Jian Cheng
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Science at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Ruilin He
- Department of Anesthesiology, The First Affiliated Hospital of Anhui Medical University, Key Laboratory of Anesthesia and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei 230022, China
| | - Ke Chen
- Department of Anesthesiology, The First Affiliated Hospital of Anhui Medical University, Key Laboratory of Anesthesia and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei 230022, China
| | - Jiqian Zhang
- Department of Anesthesiology, The First Affiliated Hospital of Anhui Medical University, Key Laboratory of Anesthesia and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei 230022, China
| | - Xuesheng Liu
- Department of Anesthesiology, The First Affiliated Hospital of Anhui Medical University, Key Laboratory of Anesthesia and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei 230022, China
| | - Jinming Hu
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Science at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
| | - Yao Lu
- Department of Anesthesiology, The First Affiliated Hospital of Anhui Medical University, Key Laboratory of Anesthesia and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei 230022, China; Ambulatory Surgery Center, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China.
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3
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Wang L, Wang Q, Wang X, Yang C, Wang X, Liu H, Wang H. Intermittent fasting alleviates postoperative cognitive dysfunction by reducing neuroinflammation in aged mice. Brain Res Bull 2024; 216:111034. [PMID: 39053649 DOI: 10.1016/j.brainresbull.2024.111034] [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: 04/27/2024] [Revised: 07/21/2024] [Accepted: 07/22/2024] [Indexed: 07/27/2024]
Abstract
Elderly individuals undergoing surgical procedures are often confronted with the peril of experiencing postoperative cognitive dysfunction (POCD). Prior research has demonstrated the exacerbating effect of sevoflurane anesthesia on neuroinflammation, which can further deteriorate the condition of POCD in elderly patients. Intermittent fasting (IF) restricts food consumption to a specific time window and has been demonstrated to ameliorate cognitive dysfunction induced by neuropathic inflammation. We subjected 18-month-old male mice to 16 hours of fasting and 8 hours of unrestricted eating over a 24-hour period for 0, 1, 2, and 4 weeks, followed by abdominal exploration under sevoflurane anesthesia. In this study, we aim to explore the potential impact of IF on postoperative cognitive function in aged mice undergoing sevoflurane surgery through the preoperative implementation of IF measures. The findings indicate two weeks of IF leads to a significant enhancement of learning and memory capabilities in mice following surgery. The cognitive performance, as determined by the novel object recognition and Morris water maze tests, as well as the synaptic plasticity, as measured by in vivo electrophysiological recordings, has demonstrated marked improvements. Furthermore, the administration of IF markedly enhances the expression of synaptic-associated proteins in hippocampal neurons, concomitant with a decreasing expression of pro-inflammatory factors and a reduced density of microglial cells within the hippocampal brain region. To summarize, the results of this study indicate that IF may mitigate inflammation in the hippocampal area of the brain. Furthermore, IF appears to provide a safeguard against cognitive impairment and synaptic plasticity impairment brought on by sevoflurane anesthesia.
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Affiliation(s)
- Lei Wang
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China; Department of Anesthesiology, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China; Department of Anesthesiology, Cangzhou Central Hospital, Cangzhou, Hebei 061001, China
| | - Qiang Wang
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China; Department of Anesthesiology, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Xiaoqing Wang
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China; Department of Anesthesiology, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Chenyi Yang
- Department of Anesthesiology, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China; Nankai University 300071, Tianjin, China; Nankai University Affinity the Third Central Hospital, Tianjin 300170, China
| | - Xinyi Wang
- Department of Anesthesiology, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China; Nankai University 300071, Tianjin, China; Nankai University Affinity the Third Central Hospital, Tianjin 300170, China
| | - Huan Liu
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China; Department of Anesthesiology, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Haiyun Wang
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China; Department of Anesthesiology, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China; Nankai University 300071, Tianjin, China; Nankai University Affinity the Third Central Hospital, Tianjin 300170, China.
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4
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Badr A, Daily KP, Eltobgy M, Estfanous S, Tan MH, Chun-Tien Kuo J, Whitham O, Carafice C, Gupta G, Amer HM, Shamseldin MM, Yousif A, Deems NP, Fitzgerald J, Yan P, Webb A, Zhang X, Pietrzak M, Ghoneim HE, Dubey P, Barrientos RM, Lee RJ, Kokiko-Cochran ON, Amer AO. Microglia-targeted inhibition of miR-17 via mannose-coated lipid nanoparticles improves pathology and behavior in a mouse model of Alzheimer's disease. Brain Behav Immun 2024; 119:919-944. [PMID: 38718909 DOI: 10.1016/j.bbi.2024.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 04/16/2024] [Accepted: 05/02/2024] [Indexed: 05/21/2024] Open
Abstract
Neuroinflammation and accumulation of Amyloid Beta (Aβ) accompanied by deterioration of special memory are hallmarks of Alzheimer's disease (AD). Effective preventative and treatment options for AD are still needed. Microglia in AD brains are characterized by elevated levels of microRNA-17 (miR-17), which is accompanied by defective autophagy, Aβ accumulation, and increased inflammatory cytokine production. However, the effect of targeting miR-17 on AD pathology and memory loss is not clear. To specifically inhibit miR-17 in microglia, we generated mannose-coated lipid nanoparticles (MLNPs) enclosing miR-17 antagomir (Anti-17 MLNPs), which are targeted to mannose receptors readily expressed on microglia. We used a 5XFAD mouse model (AD) that recapitulates many AD-related phenotypes observed in humans. Our results show that Anti-17 MLNPs, delivered to 5XFAD mice by intra-cisterna magna injection, specifically deliver Anti-17 to microglia. Anti-17 MLNPs downregulated miR-17 expression in microglia but not in neurons, astrocytes, and oligodendrocytes. Anti-17 MLNPs attenuated inflammation, improved autophagy, and reduced Aβ burdens in the brains. Additionally, Anti-17 MLNPs reduced the deterioration in spatial memory and decreased anxiety-like behavior in 5XFAD mice. Therefore, targeting miR-17 using MLNPs is a viable strategy to prevent several AD pathologies. This selective targeting strategy delivers specific agents to microglia without the adverse off-target effects on other cell types. Additionally, this approach can be used to deliver other molecules to microglia and other immune cells in other organs.
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Affiliation(s)
- Asmaa Badr
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Kylene P Daily
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Mostafa Eltobgy
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Shady Estfanous
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Michelle H Tan
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Jimmy Chun-Tien Kuo
- Division of Pharmaceutics and Pharmacology, College of Pharmacy, The Ohio State University, Columbus, the United States of America
| | - Owen Whitham
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Cierra Carafice
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Gauruv Gupta
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Heba M Amer
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Mohamed M Shamseldin
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Amir Yousif
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Nicholas P Deems
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, the United States of America
| | - Julie Fitzgerald
- Department of Neuroscience, The Ohio State University, Columbus, OH 43210
| | - Pearlly Yan
- Genomics Shared Resource, Comprehensive Cancer Center, Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, the United States of America
| | - Amy Webb
- Department of Biomedical Informatics, The Ohio State University, Columbus, OH, the United States of America
| | - Xiaoli Zhang
- Department of Biomedical Informatics, The Ohio State University, Columbus, OH, the United States of America
| | - Maciej Pietrzak
- Department of Biomedical Informatics, The Ohio State University, Columbus, OH, the United States of America
| | - Hazem E Ghoneim
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Purnima Dubey
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America
| | - Ruth M Barrientos
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, the United States of America
| | - Robert J Lee
- Division of Pharmaceutics and Pharmacology, College of Pharmacy, The Ohio State University, Columbus, the United States of America
| | | | - Amal O Amer
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, The Ohio State University, Columbus, OH, the United States of America.
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5
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Batorsky R, Ceasrine AM, Shook LL, Kislal S, Bordt EA, Devlin BA, Perlis RH, Slonim DK, Bilbo SD, Edlow AG. Hofbauer cells and fetal brain microglia share transcriptional profiles and responses to maternal diet-induced obesity. Cell Rep 2024; 43:114326. [PMID: 38848212 DOI: 10.1016/j.celrep.2024.114326] [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: 12/13/2023] [Revised: 04/25/2024] [Accepted: 05/22/2024] [Indexed: 06/09/2024] Open
Abstract
Maternal immune activation is associated with adverse offspring neurodevelopmental outcomes, many mediated by in utero microglial programming. As microglia remain inaccessible throughout development, identification of noninvasive biomarkers reflecting fetal brain microglial programming could permit screening and intervention. We used lineage tracing to demonstrate the shared ontogeny between fetal brain macrophages (microglia) and fetal placental macrophages (Hofbauer cells) in a mouse model of maternal diet-induced obesity, and single-cell RNA-seq to demonstrate shared transcriptional programs. Comparison with human datasets demonstrated conservation of placental resident macrophage signatures between mice and humans. Single-cell RNA-seq identified common alterations in fetal microglial and Hofbauer cell gene expression induced by maternal obesity, as well as sex differences in these alterations. We propose that Hofbauer cells, which are easily accessible at birth, provide insights into fetal brain microglial programs and may facilitate the early identification of offspring vulnerable to neurodevelopmental disorders.
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Affiliation(s)
- Rebecca Batorsky
- Data Intensive Studies Center, Tufts University, Medford, MA, USA
| | - Alexis M Ceasrine
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Lydia L Shook
- Division of Maternal-Fetal Medicine, Department of Ob/Gyn, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Vincent Center for Reproductive Biology, Massachusetts General Hospital Research Institute, Massachusetts General Hospital, Boston, MA, USA
| | - Sezen Kislal
- Vincent Center for Reproductive Biology, Massachusetts General Hospital Research Institute, Massachusetts General Hospital, Boston, MA, USA
| | - Evan A Bordt
- Department of Pediatrics, Lurie Center for Autism, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Benjamin A Devlin
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Roy H Perlis
- Department of Psychiatry and Center for Genomic Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Donna K Slonim
- Department of Computer Science, Tufts University, Medford, MA, USA
| | - Staci D Bilbo
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA; Department of Neurobiology, Duke University, Durham, NC, USA; Lurie Center for Autism, Massachusetts General Hospital, Boston, MA, USA
| | - Andrea G Edlow
- Division of Maternal-Fetal Medicine, Department of Ob/Gyn, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Vincent Center for Reproductive Biology, Massachusetts General Hospital Research Institute, Massachusetts General Hospital, Boston, MA, USA.
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6
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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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7
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Muscat SM, Butler MJ, Bettes MN, DeMarsh JW, Scaria EA, Deems NP, Barrientos RM. Post-operative cognitive dysfunction is exacerbated by high-fat diet via TLR4 and prevented by dietary DHA supplementation. Brain Behav Immun 2024; 116:385-401. [PMID: 38145855 PMCID: PMC10872288 DOI: 10.1016/j.bbi.2023.12.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 12/04/2023] [Accepted: 12/20/2023] [Indexed: 12/27/2023] Open
Abstract
Post-operative cognitive dysfunction (POCD) is an abrupt decline in neurocognitive function arising shortly after surgery and persisting for weeks to months, increasing the risk of dementia diagnosis. Advanced age, obesity, and comorbidities linked to high-fat diet (HFD) consumption such as diabetes and hypertension have been identified as risk factors for POCD, although underlying mechanisms remain unclear. We have previously shown that surgery alone, or 3-days of HFD can each evoke sufficient neuroinflammation to cause memory deficits in aged, but not young rats. The aim of the present study was to determine if HFD consumption before surgery would potentiate and prolong the subsequent neuroinflammatory response and memory deficits, and if so, to determine the extent to which these effects depend on activation of the innate immune receptor TLR4, which both insults are known to stimulate. Young-adult (3mo) & aged (24mo) male F344xBN F1 rats were fed standard chow or HFD for 3-days immediately before sham surgery or laparotomy. In aged rats, the combination of HFD and surgery caused persistent deficits in contextual memory and cued-fear memory, though it was determined that HFD alone was sufficient to cause the long-lasting cued-fear memory deficits. In young adult rats, HFD + surgery caused only cued-fear memory deficits. Elevated proinflammatory gene expression in the hippocampus of both young and aged rats that received HFD + surgery persisted for at least 3-weeks after surgery. In a separate experiment, rats were administered the TLR4-specific antagonist, LPS-RS, immediately before HFD onset, which ameliorated the HFD + surgery-associated neuroinflammation and memory deficits. Similarly, dietary DHA supplementation for 4 weeks prior to HFD onset blunted the neuroinflammatory response to surgery and prevented development of persistent memory deficits. These results suggest that HFD 1) increases risk of persistent POCD-associated memory impairments following surgery in male rats in 2) a TLR4-dependent manner, which 3) can be targeted by DHA supplementation to mitigate development of persistent POCD.
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Affiliation(s)
- Stephanie M Muscat
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Biomedical Sciences Graduate Program, The Ohio State University, Columbus, OH, USA; Department of Neuroscience, The Ohio State University, Columbus, OH, USA
| | - Michael J Butler
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - Menaz N Bettes
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - James W DeMarsh
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - Emmanuel A Scaria
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - Nicholas P Deems
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - Ruth M Barrientos
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Department of Neuroscience, The Ohio State University, Columbus, OH, USA; Department of Psychiatry & Behavioral Health, The Ohio State University, Columbus, OH, USA; Chronic Brain Injury Program, The Ohio State University, Columbus, OH, USA.
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8
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Oberman K, van Leeuwen BL, Nabben M, Villafranca JE, Schoemaker RG. J147 affects cognition and anxiety after surgery in Zucker rats. Physiol Behav 2024; 273:114413. [PMID: 37989448 DOI: 10.1016/j.physbeh.2023.114413] [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: 08/04/2023] [Revised: 10/15/2023] [Accepted: 11/17/2023] [Indexed: 11/23/2023]
Abstract
Vulnerable patients are at risk for neuroinflammation-mediated post-operative complications, including depression (POD) and cognitive dysfunction (POCD). Zucker rats, expressing multiple risk factors for post-operative complications in humans, may provide a clinically relevant model to study pathophysiology and explore potential interventions. J147, a newly developed anti-dementia drug, was shown to prevent POCD in young healthy rats, and improved early post-surgical recovery in Zucker rats. Aim of the present study was to investigate POCD and the therapeutic potential of J147 in male Zucker rats. Risk factors in the Zucker rat strain were evaluated by comparison with lean littermates. Zucker rats were subjected to major abdominal surgery. Acute J147 treatment was provided by a single iv injection (10 mg/kg) at the start of surgery, while chronic J147 treatment was provided in the food (aimed at 30 mg/kg/day), starting one week before surgery and up to end of protocol. Effects on behavior were assessed, and plasma, urine and brain tissue were collected and processed for immunohistochemistry and molecular analyses. Indeed, Zucker rats displayed increased risk factors for POCD, including obesity, high plasma triglycerides, low grade systemic inflammation, impaired spatial learning and decreased neurogenesis. Surgery in Zucker rats reduced exploration and increased anxiety in the Open Field test, impaired short-term spatial memory, induced a shift in circadian rhythm and increased plasma neutrophil gelatinase-associated lipocalin (NGAL), microglia activity in the CA1 and blood brain barrier leakage. Chronic, but not acute J147 treatment reduced anxiety in the Open Field test and protected against the spatial memory decline. Moreover, chronic J147 increased glucose sensitivity. Acute J147 treatment improved long-term spatial memory and reversed the circadian rhythm shift. No anti-inflammatory effects were seen for J147. Although Zucker rats displayed risk factors, surgery did not induce extensive POCD. However, increased anxiety may indicate POD. Treatment with J147 showed positive effects on behavioral and metabolic parameters, but did not affect (neuro)inflammation. The mixed effect of acute and chronic treatment may suggest a combination for optimal treatment.
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Affiliation(s)
- K Oberman
- Department of Molecular Neurobiology, GELIFES, University of Groningen, the Netherlands.
| | - B L van Leeuwen
- Department of Surgery, University Medical Center Groningen, the Netherlands
| | - M Nabben
- Departments of Genetics & Cell Biology and Clinical Genetics, Maastricht University Medical Center, Maastricht, the Netherlands
| | - J E Villafranca
- Abrexa Pharmaceuticals Inc., San Diego, United States of America
| | - R G Schoemaker
- Department of Molecular Neurobiology, GELIFES, University of Groningen, the Netherlands; University Medical Center Groningen, the Netherlands
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9
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Ince LM, Darling JS, Sanchez K, Bell KS, Melbourne JK, Davis LK, Nixon K, Gaudet AD, Fonken LK. Sex differences in microglia function in aged rats underlie vulnerability to cognitive decline. Brain Behav Immun 2023; 114:438-452. [PMID: 37709153 PMCID: PMC10790303 DOI: 10.1016/j.bbi.2023.09.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 08/07/2023] [Accepted: 09/11/2023] [Indexed: 09/16/2023] Open
Abstract
Aging is associated with a significant shift in immune system reactivity ("inflammaging"), as basal inflammation increases but protective responses to infection are compromised. The immune system exhibits considerable sex differences, which may influence the process of inflammaging, including immune cell activation and behavioral consequences of immune signaling (i.e., impaired memory). Here, we test the hypothesis that sex differences in immune aging may mediate sex differences in cognitive decline. Aged male and female rats received peripheral immune stimulation using lipopolysaccharide (LPS), then molecular, cellular, and behavioral outcomes were assessed. We observed that LPS-treated aged male rats showed cognitive impairment and increased neuroinflammatory responses relative to adult males. In contrast, aged female rats did not display these aging-related deficits. Using transcriptomic and flow cytometry analyses, we further observed significant age- and sex- dependent changes in immune cell populations in the brain parenchyma and meninges, indicating a broad shift in the neuroinflammatory environment that may potentiate these behavioral effects. Ovariectomized aged female rats were also resistant to inflammation-induced memory deficits, indicating that ovarian hormones are not required for the attenuated neuroinflammation in aged females. Overall, our results indicate that males have amplified inflammatory priming with age, which contributes to age-associated cognitive decline. Our findings highlight sexual dimorphism in mechanisms of aging, and suggest that sex is a crucial consideration for identifying therapies for aging and neuroinflammation.
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Affiliation(s)
- Louise M Ince
- Division of Pharmacology & Toxicology, College of Pharmacy, University of Texas at Austin, Austin, TX 78712, USA
| | - Jeffrey S Darling
- Division of Pharmacology & Toxicology, College of Pharmacy, University of Texas at Austin, Austin, TX 78712, USA
| | - Kevin Sanchez
- Division of Pharmacology & Toxicology, College of Pharmacy, University of Texas at Austin, Austin, TX 78712, USA
| | - Kiersten S Bell
- Division of Pharmacology & Toxicology, College of Pharmacy, University of Texas at Austin, Austin, TX 78712, USA
| | - Jennifer K Melbourne
- Division of Pharmacology & Toxicology, College of Pharmacy, University of Texas at Austin, Austin, TX 78712, USA
| | - Lourdes K Davis
- Division of Pharmacology & Toxicology, College of Pharmacy, University of Texas at Austin, Austin, TX 78712, USA; Institute for Neuroscience, University of Texas at Austin, Austin, TX 78712, USA
| | - Kimberly Nixon
- Division of Pharmacology & Toxicology, College of Pharmacy, University of Texas at Austin, Austin, TX 78712, USA
| | - Andrew D Gaudet
- Institute for Neuroscience, University of Texas at Austin, Austin, TX 78712, USA; Department of Psychology, University of Texas at Austin, Austin, TX 78712, USA; Department of Neurology, Dell Medical School, University of Texas at Austin, Austin, TX 78712, USA
| | - Laura K Fonken
- Division of Pharmacology & Toxicology, College of Pharmacy, University of Texas at Austin, Austin, TX 78712, USA; Institute for Neuroscience, University of Texas at Austin, Austin, TX 78712, USA.
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10
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Liu Y, Yang W, Xue J, Chen J, Liu S, Zhang S, Zhang X, Gu X, Dong Y, Qiu P. Neuroinflammation: The central enabler of postoperative cognitive dysfunction. Biomed Pharmacother 2023; 167:115582. [PMID: 37748409 DOI: 10.1016/j.biopha.2023.115582] [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: 07/25/2023] [Revised: 09/21/2023] [Accepted: 09/22/2023] [Indexed: 09/27/2023] Open
Abstract
The proportion of advanced age patients undergoing surgical procedures is on the rise owing to advancements in surgical and anesthesia technologies as well as an overall aging population. As a complication of anesthesia and surgery, older patients frequently suffer from postoperative cognitive dysfunction (POCD), which may persist for weeks, months or even longer. POCD is a complex pathological process involving multiple pathogenic factors, and its mechanism is yet unclear. Potential theories include inflammation, deposition of pathogenic proteins, imbalance of neurotransmitters, and chronic stress. The identification, prevention, and treatment of POCD are still in the exploratory stages owing to the absence of standardized diagnostic criteria. Undoubtedly, comprehending the development of POCD remains crucial in overcoming the illness. Neuroinflammation is the leading hypothesis and a crucial component of the pathological network of POCD and may have complex interactions with other mechanisms. In this review, we discuss the possible ways in which surgery and anesthesia cause neuroinflammation and investigate the connection between neuroinflammation and the development of POCD. Understanding these mechanisms may likely ensure that future treatment options of POCD are more effective.
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Affiliation(s)
- Yang Liu
- Department of Oncology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning province, China
| | - Wei Yang
- Department of Infectious Disease, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning province, China
| | - Jinqi Xue
- Department of Oncology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning province, China
| | - Juntong Chen
- Zhejiang University School of Medicine, Hangzhou 311121, Zhejiang province, China
| | - Shiqing Liu
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
| | - Shijie Zhang
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
| | - Xiaohui Zhang
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
| | - Xi Gu
- Department of Oncology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning province, China.
| | - Youjing Dong
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China.
| | - Peng Qiu
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China.
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11
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Li X, Wang H, Zhang Q, Sun X, Zhang M, Wang G. Inhibition of adult hippocampal neurogenesis induced by postoperative CD8 + T-cell infiltration is associated with cognitive decline later following surgery in adult mice. J Neuroinflammation 2023; 20:227. [PMID: 37798730 PMCID: PMC10557222 DOI: 10.1186/s12974-023-02910-x] [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: 06/22/2023] [Accepted: 09/27/2023] [Indexed: 10/07/2023] Open
Abstract
BACKGROUND Some patients show persistent cognitive decline for weeks, months or even years after surgery, which seriously affects their long-term prognosis and quality of life. However, most previous basic studies have focused mainly on the mechanisms of early postoperative cognitive decline, whereas cognitive decline in the longer term after surgery is less well-understood. The subgranular zone of the dentate gyrus exhibits life-long neurogenesis, supporting hippocampus-dependent learning and memory. MAIN TEXT The aim of this study was to investigate whether adult hippocampal neurogenesis (AHN) involves in cognitive decline later following surgery and to further explore the roles of CD8 + T lymphocytes infiltrating the hippocampal parenchyma after surgery in this pathological process. Cognitive function was examined in adult mice that underwent laparotomy combined with partial hepatectomy, and the results showed that cognitive decline persisted in mice who underwent surgery during the first postoperative month, even though there was a trend toward continuous improvement over time. Significantly decreased numbers of DCX + cells, BrdU + cells, and BrdU + /DCX + cells were observed on day 8 after surgery, and a significantly decreased number of NeuN + /BrdU + cells was observed on day 28 after surgery, which indicated inhibition of AHN. After surgery, T lymphocytes, the majority of which were CD8 + T cells, infiltrated the hippocampus and secreted Interferon-γ (IFN-γ). Depletion of CD8 + T cells could inhibit the increase of IFN-γ synthesis, improve hippocampal neurogenesis, and improve postoperative cognitive function. Hippocampal microinjection of IFN-γ neutralizing antibody or adeno-associated virus to knock down IFN-γ receptor 1 (IFNGR1) could also partially attenuate the inhibition of AHN and improve postoperative cognitive function. CONCLUSIONS These results demonstrate that postoperative infiltration of CD8 + T cells into the hippocampus and subsequent secretion of IFN-γ contribute to the inhibition of AHN and cognitive decline later following surgery.
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Affiliation(s)
- Xiaowei Li
- Department of Anesthesiology, Shandong Provincial Hospital, Shandong University, Jinan, 250021, Shandong, China
- Department of Anesthesiology, Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Hong Wang
- Department of Nephrology, Tai' an Central Hospital, Taian, 271000, Shandong, China
| | - Qidi Zhang
- Department of Anesthesiology, Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Xiaobin Sun
- Department of Anesthesiology, Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Mengyuan Zhang
- Department of Anesthesiology, Shandong Provincial Hospital, Shandong University, Jinan, 250021, Shandong, China.
- Department of Anesthesiology, Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China.
| | - Gongming Wang
- Department of Anesthesiology, Shandong Provincial Hospital, Shandong University, Jinan, 250021, Shandong, China.
- Department of Anesthesiology, Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China.
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12
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Li X, Li Y, Jin Y, Zhang Y, Wu J, Xu Z, Huang Y, Cai L, Gao S, Liu T, Zeng F, Wang Y, Wang W, Yuan TF, Tian H, Shu Y, Guo F, Lu W, Mao Y, Mei X, Rao Y, Peng B. Transcriptional and epigenetic decoding of the microglial aging process. NATURE AGING 2023; 3:1288-1311. [PMID: 37697166 PMCID: PMC10570141 DOI: 10.1038/s43587-023-00479-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Accepted: 08/03/2023] [Indexed: 09/13/2023]
Abstract
As important immune cells, microglia undergo a series of alterations during aging that increase the susceptibility to brain dysfunctions. However, the longitudinal characteristics of microglia remain poorly understood. In this study, we mapped the transcriptional and epigenetic profiles of microglia from 3- to 24-month-old mice. We first discovered unexpected sex differences and identified age-dependent microglia (ADEM) genes during the aging process. We then compared the features of aging and reactivity in female microglia at single-cell resolution and epigenetic level. To dissect functions of aged microglia excluding the influence from other aged brain cells, we established an accelerated microglial turnover model without directly affecting other brain cells. By this model, we achieved aged-like microglia in non-aged brains and confirmed that aged-like microglia per se contribute to cognitive decline. Collectively, our work provides a comprehensive resource for decoding the aging process of microglia, shedding light on how microglia maintain brain functions.
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Affiliation(s)
- Xiaoyu Li
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China
| | - Yuxin Li
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China
| | - Yuxiao Jin
- Department of Neurology, Zhongshan Hospital, Department of Laboratory Animal Science, MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China
| | - Yuheng Zhang
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China
| | - Jingchuan Wu
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Zhen Xu
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Yubin Huang
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Lin Cai
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China
- Department of Neurology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shuai Gao
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China
| | - Taohui Liu
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China
| | - Fanzhuo Zeng
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Yafei Wang
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China
| | - Wenxu Wang
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China
| | - Ti-Fei Yuan
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hengli Tian
- Department of Neurology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yousheng Shu
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China
| | - Feifan Guo
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China
| | - Wei Lu
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China
| | - Ying Mao
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Xifan Mei
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Yanxia Rao
- Department of Neurology, Zhongshan Hospital, Department of Laboratory Animal Science, MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China.
| | - Bo Peng
- Department of Neurosurgery, Jinshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Innovative Center for New Drug Development of Immune Inflammatory Diseases, Ministry of Education, Fudan University, Shanghai, China.
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China.
- Co-Innovation Center of Neurodegeneration, Nantong University, Nantong, China.
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13
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Akash MSH, Akbar M, Rehman K, Shah MA, Panichayupakaranant P, Imran M, Assiri MA. Biochemical profiling of berberine-enriched extract in aluminum chloride induced oxidative damage and neuroinflammation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:85263-85275. [PMID: 37380861 DOI: 10.1007/s11356-023-28392-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 06/19/2023] [Indexed: 06/30/2023]
Abstract
Despite the numerous treatment strategies used for Alzheimer's disease (AD), only a few cholinesterase inhibitor drugs, such as memantine, are effective in symptomatically relieving the hallmarks of AD, providing momentary recovery of memory and cognitive decline. These available drugs do not treat the underlying causes of AD, and their chronic use is associated with serious adverse effects and disease progression. Berberine is an isoquinoline alkaloid that has been reported to possess therapeutic potential against AD. Therefore, its activity was evaluated against an aluminum chloride (AlCl3)-induced AD rat model, and a berberine-enriched extract (BEE) was used to determine if its activity is equivalent to pure berberine (PB). The rats were administered 300 mg/kg of oral AlCl3 to induce AD and were then treated with oral PB at a dosage of 50 mg/kg, BEE at a dosage of 50 mg/kg, and rivastigmine at a dosage of 1 mg/kg as a standard drug for 21 days. In this study, various parameters were assessed to evaluate cognitive functions, such as behavioral analysis, antioxidant enzyme levels, acetylcholinesterase (AChE) activity, proinflammatory cytokine levels, real-time polymerase chain reaction (RT-PCR) analysis of different biomarkers (AChE, IL-1α, IL-1β, BACE-1, TNF-α) linked to AD, and histopathological changes in the rats' brains. After 21 days, the disease control group showed a significant decline in cognitive function, decreased levels of antioxidant enzymes, upregulated activity of the AChE enzyme, increased levels of proinflammatory cytokines, and marked elevation in mRNA expression of AD-associated biomarkers. On the other hand, the treatment groups showed significant improvements in memory deficits, elevated levels of antioxidant enzymes, reduced levels of proinflammatory cytokines, decreased AChE activity, and significant downregulation of the expression of predefined biomarkers. Histological examination of the treatment groups showed less neuroinflammation and fewer amyloid plaques compared to the disease control group. In conclusion, both PB and BEE have comparable neuroprotective potential to mitigate the pathological hallmarks of AD. However, controlled clinical trials are needed to assess their efficacy and safety.
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Affiliation(s)
| | - Moazzama Akbar
- Department of Pharmacy, The University of Faisalabad, Faisalabad, Pakistan
| | - Kanwal Rehman
- Department of Pharmacy, The Women University, Multan, Pakistan.
| | | | - Pharkphoom Panichayupakaranant
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Thailand
| | - Muhammad Imran
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha, 62413, Saudi Arabia
- Department of Chemistry, Faculty of Science, King Khalid University, Abha, 62413, Saudi Arabia
| | - Mohammed A Assiri
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha, 62413, Saudi Arabia
- Department of Chemistry, Faculty of Science, King Khalid University, Abha, 62413, Saudi Arabia
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14
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González Olmo BM, Bettes MN, DeMarsh JW, Zhao F, Askwith C, Barrientos RM. Short-term high-fat diet consumption impairs synaptic plasticity in the aged hippocampus via IL-1 signaling. NPJ Sci Food 2023; 7:35. [PMID: 37460765 DOI: 10.1038/s41538-023-00211-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 07/06/2023] [Indexed: 07/20/2023] Open
Abstract
More Americans are consuming diets higher in saturated fats and refined sugars than ever before. These trends could have serious consequences for the older population because high-fat diet (HFD) consumption, known to induce neuroinflammation, has been shown to accelerate and aggravate memory declines. We have previously demonstrated that short-term HFD consumption, which does not evoke obesity-related comorbidities, produced profound impairments to hippocampal-dependent memory in aged rats. These impairments were precipitated by increases in proinflammatory cytokines, primarily interleukin-1 beta (IL-1β). Here, we explored the extent to which short-term HFD consumption disrupts hippocampal synaptic plasticity, as measured by long-term potentiation (LTP), in young adult and aged rats. We demonstrated that (1) HFD disrupted late-phase LTP in the hippocampus of aged, but not young adult rats, (2) HFD did not disrupt early-phase LTP, and (3) blockade of the IL-1 receptor rescued L-LTP in aged HFD-fed rats. These findings suggest that hippocampal memory impairments in aged rats following HFD consumption occur through the deterioration of synaptic plasticity and that IL-1β is a critical driver of that deterioration.
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Affiliation(s)
- Brigitte M González Olmo
- Department of Biomedical Education & Anatomy, Ohio State University, Columbus, OH, USA
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, USA
| | - Menaz N Bettes
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, USA
| | - James W DeMarsh
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, USA
| | - Fangli Zhao
- Department of Neuroscience, The Ohio State University, Columbus, OH, USA
| | - Candice Askwith
- Department of Neuroscience, The Ohio State University, Columbus, OH, USA
| | - Ruth M Barrientos
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, USA.
- Department of Neuroscience, The Ohio State University, Columbus, OH, USA.
- Department of Psychiatry and Behavioral Health, Ohio State University, Columbus, OH, USA.
- Chronic Brain Injury Program, The Ohio State University, Columbus, OH, USA.
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15
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Zhang Z, Guo L, Yang F, Peng S, Wang D, Lai X, Su B, Xie H. Adiponectin Attenuates Splenectomy-Induced Cognitive Deficits by Neuroinflammation and Oxidative Stress via TLR4/MyD88/NF-κb Signaling Pathway in Aged Rats. ACS Chem Neurosci 2023; 14:1799-1809. [PMID: 37141577 DOI: 10.1021/acschemneuro.2c00744] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023] Open
Abstract
Perioperative neurocognitive disorder (PND) is a common adverse event after surgical trauma in elderly patients. The pathogenesis of PND is still unclear. Adiponectin (APN) is a plasma protein secreted by adipose tissue. We have reported that a decreased APN expression is associated with PND patients. APN may be a promising therapeutic agent for PND. However, the neuroprotective mechanism of APN in PND is still unclear. In this study, 18 month old male Sprague-Dawley rats were assigned to six groups: the sham, sham + APN (intragastric (i.g.) administration of 10 μg/kg/day for 20 days before splenectomy), PND (splenectomy), PND + APN, PND + TAK-242 (intraperitoneal (i.p.) administration of 3 mg/kg TAK-242), and PND + APN + lipopolysaccharide (LPS) (i.p. administration of 2 mg/kg LPS). We first found that APN gastric infusion significantly improved learning and cognitive function in the Morris water maze (MWM) test after surgical trauma. Further experiments indicated that APN could inhibit the Toll-like receptor 4 (TLR4)/myeloid differentiation factor 88 (MyD88)/nuclear factor kappa B (NF-κb) p65 pathway to decrease the degree of oxidative damage (malondialdehyde (MDA) and superoxide dismutase (SOD)), microglia-mediated neuroinflammation (ionized calcium binding adapter molecule 1 (IBA1), caspase-1, tumor necrosis factor (TNF)-α, interleukin-1β (IL-1β), and interleukin-6 (IL-6)), and apoptosis (p53, Bcl2, Bax, and caspase 3) in hippocampus. By using LPS-specific agonist and TAK-242-specific inhibitor, the involvement of TLR4 engagement was confirmed. APN intragastric administration exerts a neuroprotective effect against cognitive deficits induced by peripheral trauma, and the possible mechanisms include the inhibition of neuroinflammation, oxidative stress, and apoptosis, mediated by the suppression of the TLR4/MyD88/NF-κb signaling pathway. We propose that oral APN may be a promising candidate for PND treatment.
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Affiliation(s)
- Zhijing Zhang
- Department of Anesthesiology, Affiliated Dongguan Hospital, Southern Medical University (Dongguan People's Hospital), 523000 Dongguan, China
| | - Lideng Guo
- Department of Anesthesiology, Affiliated Dongguan Hospital, Southern Medical University (Dongguan People's Hospital), 523000 Dongguan, China
- Guangdong Medical University, No. 2 East Wenming Road, Xiashan District, 524000 Zhanjiang, China
| | - Fei Yang
- Department of Anesthesiology, Affiliated Dongguan Hospital, Southern Medical University (Dongguan People's Hospital), 523000 Dongguan, China
- Southern Medical University, No. 1023, South Sha Tai Road, Jingxi Street, Baiyun District, 510000 Guangzhou, China
| | - Shanpan Peng
- Department of Anesthesiology, Affiliated Dongguan Hospital, Southern Medical University (Dongguan People's Hospital), 523000 Dongguan, China
- Guangdong Medical University, No. 2 East Wenming Road, Xiashan District, 524000 Zhanjiang, China
| | - Di Wang
- Department of Anesthesiology, Affiliated Dongguan Hospital, Southern Medical University (Dongguan People's Hospital), 523000 Dongguan, China
- Guangdong Medical University, No. 2 East Wenming Road, Xiashan District, 524000 Zhanjiang, China
| | - Xiawei Lai
- Department of Anesthesiology, Affiliated Dongguan Hospital, Southern Medical University (Dongguan People's Hospital), 523000 Dongguan, China
- Southern Medical University, No. 1023, South Sha Tai Road, Jingxi Street, Baiyun District, 510000 Guangzhou, China
| | - Baiqin Su
- Department of Anesthesiology, Affiliated Dongguan Hospital, Southern Medical University (Dongguan People's Hospital), 523000 Dongguan, China
| | - Haihui Xie
- Department of Anesthesiology, Affiliated Dongguan Hospital, Southern Medical University (Dongguan People's Hospital), 523000 Dongguan, China
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16
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Li X, Gao Y, Han X, Tang S, Li N, Liu X, Ni X. Maresin1 ameliorates postoperative cognitive dysfunction in aged rats by potentially regulating the NF-κB pathway to inhibit astrocyte activation. Exp Gerontol 2023; 176:112168. [PMID: 37055002 DOI: 10.1016/j.exger.2023.112168] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 04/09/2023] [Accepted: 04/10/2023] [Indexed: 04/15/2023]
Abstract
Postoperative cognitive dysfunction (POCD) is one of the most serious postoperative complications in the elderly population. Perioperative central neuroinflammation is considered to be an important pathological mechanism of POCD, with the activation of astrocytes playing a key role in central neuroinflammation. Maresin1 (MaR1) is a specific pro-resolving mediator synthesized by macrophages in the resolution stage of inflammation, and provides unique anti-inflammatory and pro-resolution effects by limiting excessive neuroinflammation and promoting postoperative recovery. However, the question remains whether MaR1 can have a positive effect on POCD. The objective of this study was to investigate the protective effect of MaR1 on POCD cognitive function in aged rats after splenectomy. Morris water maze test and IntelliCage test showed that splenectomy could cause transient cognitive dysfunction in aged rats; however, the cognitive impairment of rats was significantly mitigated when MaR1 pretreatment was administered. MaR1 significantly alleviated the fluorescence intensity and protein expression of glial fibrillary acidic protein and central nervous system specific protein in the cornu ammonis 1 region of the hippocampus. Simultaneously, the morphology of astrocytes was also severely altered. Further experiments showed that MaR1 inhibited the mRNA and protein expression of several key proinflammatory cytokines-interleukin-1β, interleukin-6, and tumor necrosis factor-α in the hippocampus of aged rats following splenectomy. The molecular mechanism underlying this process was explored by evaluating expression of components of the nuclear factor κB (NF-κB) signaling pathway. MaR1 substantially inhibited the mRNA and protein expression of NF-κB p65 and κB inhibitor kinase β. Collectively, these results suggest that MaR1 ameliorated splenectomy-induced transient cognitive impairment in elderly rats, and this neuroprotective mechanism may occur through regulating the NF-κB pathway to inhibit astrocyte activation.
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Affiliation(s)
- Xiuhua Li
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - Yubo Gao
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - Xu Han
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - Shaling Tang
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - Na Li
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - Xing Liu
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - Xinli Ni
- Department of Anaesthesia and Perioperative Medicine, General Hospital of Ningxia Medical University, Yinchuan 750004, China.
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17
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Muscat SM, Butler MJ, Mackey-Alfonso SE, Barrientos RM. Young adult and aged female rats are vulnerable to amygdala-dependent, but not hippocampus-dependent, memory impairment following short-term high-fat diet. Brain Res Bull 2023; 195:145-156. [PMID: 36870621 PMCID: PMC10257807 DOI: 10.1016/j.brainresbull.2023.03.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 02/18/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023]
Abstract
Global populations are increasingly consuming diets high in saturated fats and refined carbohydrates, and such diets have been well-associated with heightened inflammation and neurological dysfunction. Notably, older individuals are particularly vulnerable to the impact of unhealthy diet on cognition, even after a single meal, and pre-clinical rodent studies have demonstrated that short-term consumption of high-fat diet (HFD) induces marked increases in neuroinflammation and cognitive impairment. Unfortunately though, to date, most studies on the topic of nutrition and cognition, especially in aging, have been performed only in male rodents. This is especially concerning given that older females are more vulnerable to develop certain memory deficits and/or severe memory-related pathologies than males. Thus, the aim of the present study was to determine the extent to which short-term HFD consumption impacts memory function and neuroinflammation in female rats. Young adult (3 months) and aged (20-22 months) female rats were fed HFD for 3 days. Using contextual fear conditioning, we found that HFD had no effect on long-term contextual memory (hippocampus-dependent) at either age, but impaired long-term auditory-cued memory (amygdala-dependent) regardless of age. Gene expression of Il-1β was markedly dysregulated in the amygdala, but not hippocampus, of both young and aged rats after 3 days of HFD. Interestingly, modulation of IL-1 signaling via central administration of the IL-1 receptor antagonist (which we have previously demonstrated to be protective in males) had no impact on memory function following the HFD in females. Investigation of the memory-associated gene Pacap and its receptor Pac1r revealed differential effects of HFD on their expression in the hippocampus and amygdala. Specifically, HFD induced increased expression of Pacap and Pac1r in the hippocampus, whereas decreased Pacap was observed in the amygdala. Collectively, these data suggest that both young adult and aged female rats are vulnerable to amygdala-dependent (but not hippocampus-dependent) memory impairments following short-term HFD consumption, and identify potential mechanisms related to IL-1β and PACAP signaling in these differential effects. Notably, these findings are strikingly different than those previously reported in male rats using the same diet regimen and behavioral paradigms, and highlight the importance of examining potential sex differences in the context of neuroimmune-associated cognitive dysfunction.
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Affiliation(s)
- Stephanie M Muscat
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Biomedical Sciences Graduate Program, The Ohio State University, Columbus, OH, USA
| | - Michael J Butler
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - Sabrina E Mackey-Alfonso
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Medical Scientist Training Program, The Ohio State University, Columbus, OH, USA
| | - Ruth M Barrientos
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Department of Psychiatry and Behavioral Health, The Ohio State University, Columbus, OH, USA; Department of Neuroscience, The Ohio State University, Columbus, OH, USA; Chronic Brain Injury Program, The Ohio State University, Columbus, OH, USA.
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18
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Wang Y, Cai Z, Zhan G, Li X, Li S, Wang X, Li S, Luo A. Caffeic Acid Phenethyl Ester Suppresses Oxidative Stress and Regulates M1/M2 Microglia Polarization via Sirt6/Nrf2 Pathway to Mitigate Cognitive Impairment in Aged Mice following Anesthesia and Surgery. Antioxidants (Basel) 2023; 12:antiox12030714. [PMID: 36978961 PMCID: PMC10045012 DOI: 10.3390/antiox12030714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/01/2023] [Accepted: 03/10/2023] [Indexed: 03/15/2023] Open
Abstract
Postoperative cognitive dysfunction (POCD) is a severe neurological complication after anesthesia and surgery. However, there is still a lack of effective clinical pharmacotherapy due to its unclear pathogenesis. Caffeic acid phenethyl ester (CAPE), which is obtained from honeybee propolis and medicinal plants, shows powerful antioxidant, anti-inflammatory, and immunomodulating properties. In this study, we aimed to evaluate whether CAPE mitigated cognitive impairment following anesthesia and surgery and its potential underlying mechanisms in aged mice. Here, isoflurane anesthesia and tibial fracture surgery were used as the POCD model, and H2O2-induced BV2 cells were established as the microglial oxidative stress model. We revealed that CAPE pretreatment suppressed oxidative stress and promoted the switch of microglia from the M1 to the M2 type in the hippocampus, thereby ameliorating cognitive impairment caused by anesthesia and surgery. Further investigation indicated that CAPE pretreatment upregulated hippocampal Sirt6/Nrf2 expression after anesthesia and surgery. Moreover, mechanistic studies in BV2 cells demonstrated that the potent effects of CAPE pretreatment on reducing ROS generation and promoting protective polarization were attenuated by a specific Sirt6 inhibitor, OSS_128167. In summary, our findings opened a promising avenue for POCD prevention through CAPE pretreatment that enhanced the Sirt6/Nrf2 pathway to suppress oxidative stress as well as favor microglia protective polarization.
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Affiliation(s)
- Yue Wang
- Department of Anesthesiology, 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, 1095 Jiefang Avenue, Wuhan 430030, China
| | - Ziwen Cai
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan 430030, China
| | - Gaofeng Zhan
- Department of Anesthesiology, 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, 1095 Jiefang Avenue, Wuhan 430030, China
| | - Xing Li
- Department of Anesthesiology, 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, 1095 Jiefang Avenue, Wuhan 430030, China
| | - Shan Li
- Department of Anesthesiology, 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, 1095 Jiefang Avenue, Wuhan 430030, China
| | - Xuan Wang
- Department of Anesthesiology, 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, 1095 Jiefang Avenue, Wuhan 430030, China
| | - Shiyong Li
- Department of Anesthesiology, 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, 1095 Jiefang Avenue, Wuhan 430030, China
- Correspondence: (S.L.); (A.L.)
| | - Ailin Luo
- Department of Anesthesiology, 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, 1095 Jiefang Avenue, Wuhan 430030, China
- Correspondence: (S.L.); (A.L.)
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19
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Martin LF, Cheng K, Washington SM, Denton M, Goel V, Khandekar M, Largent-Milnes TM, Patwardhan A, Ibrahim MM. Green Light Exposure Elicits Anti-inflammation, Endogenous Opioid Release and Dampens Synaptic Potentiation to Relieve Post-surgical Pain. THE JOURNAL OF PAIN 2023; 24:509-529. [PMID: 36283655 PMCID: PMC9991952 DOI: 10.1016/j.jpain.2022.10.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 10/11/2022] [Accepted: 10/17/2022] [Indexed: 11/16/2022]
Abstract
Light therapy improves multiple conditions such as seasonal affective disorders, circadian rhythm dysregulations, and neurodegenerative diseases. However, little is known about its potential benefits in pain management. While current pharmacologic methods are effective in many cases, the associated side effects can limit their use. Non-pharmacological methods would minimize drug dependence, facilitating a reduction of the opioid burden. Green light therapy has been shown to be effective in reducing chronic pain in humans and rodents. However, its underlying mechanisms remain incompletely defined. In this study, we demonstrate that green light exposure reduced postsurgical hypersensitivity in rats. Moreover, this therapy potentiated the antinociceptive effects of morphine and ibuprofen on mechanical allodynia in male rats. Importantly, in female rats, GLED potentiated the antinociceptive effects of morphine but did not affect that of ibuprofen. We showed that green light increases endogenous opioid levels while lessening synaptic plasticity and neuroinflammation. Importantly, this study reveals new insights into how light exposure can affect neuroinflammation and plasticity in both genders. Clinical translation of these results could provide patients with improved pain control and decrease opioid consumption. Given the noninvasive nature of green light, this innovative therapy would be readily implementable in hospitals. PERSPECTIVE: This study provides a potential additional therapy to decrease postsurgical pain. Given the safety, availability, and the efficacy of green light therapy, there is a significant potential for advancing the green light therapy to clinical trials and eventual translation to clinical settings.
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Affiliation(s)
- Laurent F Martin
- Department of Pharmacology, College of Medicine, The University of Arizona, Tucson, Arizona; Department of Anesthesiology, College of Medicine, The University of Arizona, Tucson, Arizona
| | - Kevin Cheng
- Department of Pharmacology, College of Medicine, The University of Arizona, Tucson, Arizona
| | - Stephanie M Washington
- Department of Anesthesiology, College of Medicine, The University of Arizona, Tucson, Arizona
| | - Millie Denton
- Department of Anesthesiology, College of Medicine, The University of Arizona, Tucson, Arizona
| | - Vasudha Goel
- Department of Anesthesiology, The University of Minnesota Medical School, Minneapolis, Minnesota
| | - Maithili Khandekar
- Department of Anesthesiology, College of Medicine, The University of Arizona, Tucson, Arizona
| | - Tally M Largent-Milnes
- Department of Pharmacology, College of Medicine, The University of Arizona, Tucson, Arizona
| | - Amol Patwardhan
- Department of Pharmacology, College of Medicine, The University of Arizona, Tucson, Arizona; Department of Anesthesiology, College of Medicine, The University of Arizona, Tucson, Arizona; Department of Neurosurgery, College of Medicine, The University of Arizona, Tucson, Arizona; Comprehensive Pain and Addiction Center, The University of Arizona, Tucson, Arizona
| | - Mohab M Ibrahim
- Department of Pharmacology, College of Medicine, The University of Arizona, Tucson, Arizona; Department of Anesthesiology, College of Medicine, The University of Arizona, Tucson, Arizona; Department of Neurosurgery, College of Medicine, The University of Arizona, Tucson, Arizona; Comprehensive Pain and Addiction Center, The University of Arizona, Tucson, Arizona.
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20
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Butler MJ, Sengupta S, Muscat SM, Amici SA, Biltz RG, Deems NP, Dravid P, Mackey-Alfonso S, Ijaz H, Bettes MN, Godbout JP, Kapoor A, Guerau-de-Arellano M, Barrientos RM. CD8 + T cells contribute to diet-induced memory deficits in aged male rats. Brain Behav Immun 2023; 109:235-250. [PMID: 36764399 PMCID: PMC10124165 DOI: 10.1016/j.bbi.2023.02.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/27/2023] [Accepted: 02/03/2023] [Indexed: 02/11/2023] Open
Abstract
We have previously shown that short-term (3-day) high fat diet (HFD) consumption induces a neuroinflammatory response and subsequent impairment of long-term memory in aged, but not young adult, male rats. However, the immune cell phenotypes driving this proinflammatory response are not well understood. Previously, we showed that microglia isolated from young and aged rats fed a HFD express similar levels of priming and proinflammatory transcripts, suggesting that additional factors may drive the exaggerated neuroinflammatory response selectively observed in aged HFD-fed rats. It is established that T cells infiltrate both the young and especially the aged central nervous system (CNS) and contribute to immune surveillance of the parenchyma. Thus, we investigated the modulating role of short-term HFD on T cell presence in the CNS in aged rats using bulk RNA sequencing and flow cytometry. RNA sequencing results indicate that aging and HFD altered the expression of genes and signaling pathways associated with T cell signaling, immune cell trafficking, and neuroinflammation. Moreover, flow cytometry data showed that aging alone increased CD4+ and CD8+ T cell presence in the brain and that CD8+, but not CD4+, T cells were further increased in aged rats fed a HFD. Based on these data, we selectively depleted circulating CD8+ T cells via an intravenous injection of an anti-CD8 antibody in aged rats prior to 3 days of HFD to infer the functional role these cells may be playing in long-term memory and neuroinflammation. Results indicate that peripheral depletion of CD8+ T cells lowered hippocampal cytokine levels and prevented the HFD-induced i) increase in brain CD8+ T cells, ii) memory impairment, and iii) alterations in pre- and post-synaptic structures in the hippocampus and amygdala. Together, these data indicate a substantial role for CD8+ T cells in mediating diet-induced memory impairments in aged male rats.
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Affiliation(s)
- Michael J Butler
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Department of Psychiatry and Behavioral Health, The Ohio State University, Columbus, OH, USA.
| | - Shouvonik Sengupta
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Biomedical Sciences Graduate Program, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - Stephanie M Muscat
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Biomedical Sciences Graduate Program, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - Stephanie A Amici
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; School of Health and Rehabilitation Sciences, The Ohio State University, Columbus, OH, USA
| | - Rebecca G Biltz
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Neuroscience Graduate Program, The Ohio State University, Columbus, OH, USA
| | - Nicholas P Deems
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Neuroscience Graduate Program, The Ohio State University, Columbus, OH, USA
| | - Piyush Dravid
- College of Medicine, The Ohio State University, Columbus, OH 43210, USA; Center for Vaccines and Immunity, The Research Institute at Nationwide Children's Hospital, Columbus, OH 43205, USA
| | - Sabrina Mackey-Alfonso
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Neuroscience Graduate Program, The Ohio State University, Columbus, OH, USA
| | - Haanya Ijaz
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - Menaz N Bettes
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - Jonathan P Godbout
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Department of Neuroscience, The Ohio State University, Columbus, OH 43210, USA; Chronic Brain Injury Program, The Ohio State University, Columbus, OH 43210, USA
| | - Amit Kapoor
- College of Medicine, The Ohio State University, Columbus, OH 43210, USA; Center for Vaccines and Immunity, The Research Institute at Nationwide Children's Hospital, Columbus, OH 43205, USA
| | - Mireia Guerau-de-Arellano
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; School of Health and Rehabilitation Sciences, The Ohio State University, Columbus, OH, USA
| | - Ruth M Barrientos
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Department of Psychiatry and Behavioral Health, The Ohio State University, Columbus, OH, USA; Department of Neuroscience, The Ohio State University, Columbus, OH 43210, USA; Chronic Brain Injury Program, The Ohio State University, Columbus, OH 43210, USA
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21
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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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22
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Tan X, Wang J, Yao J, Yuan J, Dai Y, Sun M, Zhang T, Yang J, Cai W, Qiu L, Sun J. Microglia participate in postoperative cognitive dysfunction by mediating the loss of inhibitory synapse through the complement pathway. Neurosci Lett 2023; 796:137049. [PMID: 36608926 DOI: 10.1016/j.neulet.2023.137049] [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: 09/22/2022] [Revised: 12/13/2022] [Accepted: 01/01/2023] [Indexed: 01/05/2023]
Abstract
BACKGROUND Elderly patients after surgery are prone to cognitive decline known as postoperative cognitive dysfunction (POCD). Several studies have shown that the microglial activation and the increase of complement protein expression in hippocampus induced by surgery may be related to the pathogenesis of POCD. The purpose of this study was to determine whether microglia and complement system were involved in cognitive dysfunction in aged mice. METHODS The POCD model was established by exploratory laparotomy in 15-month-old male C57BL/6J mice and animal behavioral tests were performed to test hippocampal-dependent memory capacity. Minocycline was used to suppress the activation of microglia, and complement 3 receptor inhibitor was used to suppress the association between microglia and complement 3. Western blot and immunofluorescence were used to detect the microglial activation, complement protein, and synaptic protein expressions. RESULTS Operation induced hippocampal-dependent memory impairment (P < 0.01), which was accompanied by microglial activation (P < 0.01). There was also a significant reduction in inhibitory synaptic protein expression in the hippocampus of mice in the surgery group (P < 0.01). However, minocycline, a microglia inhibitor, rescued all the above changes. In addition, C3RI intervention inhibited the phagocytosis of inhibitory synapses by microglia (P < 0.05) and improved the cognitive function of mice (P < 0.01). CONCLUSION Microglia participate in postoperative cognitive dysfunction by mediating inhibitory synaptic loss through the complement pathway.
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Affiliation(s)
- Xiaoxiang Tan
- Department of Anesthesiology, Surgery and Pain Management, Zhongda Hospital, the School of Medicine, Southeast University, Nanjing, Jiangsu Province, China
| | - Jiajia Wang
- Department of Anesthesiology, Surgery and Pain Management, Zhongda Hospital, the School of Medicine, Southeast University, Nanjing, Jiangsu Province, China
| | - Juan Yao
- Department of Anesthesiology, Surgery and Pain Management, Zhongda Hospital, the School of Medicine, Southeast University, Nanjing, Jiangsu Province, China
| | - Jing Yuan
- Department of Anesthesiology, Surgery and Pain Management, Zhongda Hospital, the School of Medicine, Southeast University, Nanjing, Jiangsu Province, China
| | - Yuchen Dai
- Department of Anesthesiology, Surgery and Pain Management, Zhongda Hospital, the School of Medicine, Southeast University, Nanjing, Jiangsu Province, China
| | - Menghan Sun
- Department of Anesthesiology, Surgery and Pain Management, Zhongda Hospital, the School of Medicine, Southeast University, Nanjing, Jiangsu Province, China
| | - Tianhao Zhang
- Department of Anesthesiology, Surgery and Pain Management, Zhongda Hospital, the School of Medicine, Southeast University, Nanjing, Jiangsu Province, China
| | - Jiaojiao Yang
- Department of Anesthesiology, Surgery and Pain Management, Zhongda Hospital, the School of Medicine, Southeast University, Nanjing, Jiangsu Province, China
| | - Wenlan Cai
- Department of Anesthesiology, Surgery and Pain Management, Zhongda Hospital, the School of Medicine, Southeast University, Nanjing, Jiangsu Province, China
| | - Lili Qiu
- Department of Anesthesiology, Surgery and Pain Management, Zhongda Hospital, the School of Medicine, Southeast University, Nanjing, Jiangsu Province, China.
| | - Jie Sun
- Department of Anesthesiology, Surgery and Pain Management, Zhongda Hospital, the School of Medicine, Southeast University, Nanjing, Jiangsu Province, China.
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23
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Yang T, Velagapudi R, Kong C, Ko U, Kumar V, Brown P, Franklin NO, Zhang X, Caceres AI, Min H, Filiano AJ, Rodriguiz RM, Wetsel WC, Varghese S, Terrando N. Protective effects of omega-3 fatty acids in a blood-brain barrier-on-chip model and on postoperative delirium-like behaviour in mice. Br J Anaesth 2023; 130:e370-e380. [PMID: 35778276 PMCID: PMC9997088 DOI: 10.1016/j.bja.2022.05.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 05/05/2022] [Accepted: 05/16/2022] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Peripheral surgical trauma can trigger neuroinflammation and ensuing neurological complications, such as delirium. The mechanisms whereby surgery contributes to postoperative neuroinflammation remain unclear and without effective therapies. Here, we developed a microfluidic-assisted blood-brain barrier (BBB) device and tested the effects of omega-3 fatty acids on neuroimmune interactions after orthopaedic surgery. METHODS A microfluidic-assisted BBB device was established using primary human cells. Tight junction proteins, vascular cell adhesion molecule 1 (VCAM-1), BBB permeability, and astrocytic networks were assessed after stimulation with interleukin (IL)-1β and in the presence or absence of a clinically available omega-3 fatty acid emulsion (Omegaven®; Fresenius Kabi, Bad Homburg, Germany). Mice were treated 1 h before orthopaedic surgery with 10 μl g-1 body weight of omega-3 fatty acid emulsion i.v. or equal volumes of saline. Changes in pericytes, perivascular macrophages, BBB opening, microglial activation, and inattention were evaluated. RESULTS Omega-3 fatty acids protected barrier permeability, endothelial tight junctions, and VCAM-1 after exposure to IL-1β in the BBB model. In vivo studies confirmed that omega-3 fatty acid treatment inhibited surgery-induced BBB impairment, microglial activation, and delirium-like behaviour. We identified a novel role for pericyte loss and perivascular macrophage activation in mice after surgery, which were rescued by prophylaxis with i.v. omega-3 fatty acids. CONCLUSIONS We present a new approach to study neuroimmune interactions relevant to perioperative recovery using a microphysiological BBB platform. Changes in barrier function, including dysregulation of pericytes and perivascular macrophages, provide new targets to reduce postoperative delirium.
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Affiliation(s)
- Ting Yang
- Department of Medicine, Division of Nephrology, Duke University Medical Center, Durham, NC, USA
| | - Ravikanth Velagapudi
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, NC, USA
| | - Cuicui Kong
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, NC, USA
| | - Unghyeon Ko
- Department of Orthopaedic Surgery, Duke University School of Medicine, Durham, NC, USA
| | - Vardhman Kumar
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Paris Brown
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Nathan O. Franklin
- Department of Psychiatry and Behavioral Sciences, Mouse Behavioral and Neuroendocrine Analysis Core Facility, Duke University Medical Center, Durham, NC, USA
| | - Xiaobei Zhang
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, NC, USA
| | - Ana I. Caceres
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, NC, USA
| | - Hyunjung Min
- Department of Neurosurgery, Duke University, Durham, NC, USA
| | - Anthony J. Filiano
- Department of Neurosurgery, Duke University, Durham, NC, USA
- Department of Immunology, Duke University Medical Center, Durham, NC, USA
| | - Ramona M. Rodriguiz
- Department of Psychiatry and Behavioral Sciences, Mouse Behavioral and Neuroendocrine Analysis Core Facility, Duke University Medical Center, Durham, NC, USA
| | - William C. Wetsel
- Department of Psychiatry and Behavioral Sciences, Mouse Behavioral and Neuroendocrine Analysis Core Facility, Duke University Medical Center, Durham, NC, USA
- Department of Neurobiology, Duke University Medical Center, Durham, NC, USA
- Department of Cell Biology, Duke University Medical Center, Durham, NC, USA
| | - Shyni Varghese
- Department of Orthopaedic Surgery, Duke University School of Medicine, Durham, NC, USA
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, USA
| | - Niccolò Terrando
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, NC, USA
- Department of Immunology, Duke University Medical Center, Durham, NC, USA
- Department of Cell Biology, Duke University Medical Center, Durham, NC, USA
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24
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Shen C, Liu X, Liu T, Ou Y, Ouyang R. IL-33/ST2 mediating systemic inflammation and neuroinflammation through NF-kB participated in the neurocognitive impairment in obstructive sleep apnea. Int Immunopharmacol 2023; 115:109604. [PMID: 36580760 DOI: 10.1016/j.intimp.2022.109604] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 12/09/2022] [Accepted: 12/13/2022] [Indexed: 12/28/2022]
Abstract
Increasing evidence has noted that neuroinflammation contributes to the pathological processes of cognitive impairment of obstructive sleep apnea (OSA) patients. Interleukin (IL) -33/suppression of tumorigenicity 2 (ST2) signaling pathway plays well-defined roles in the inflammatory progression. The study aims to elucidate whether IL-33/ST2 signaling pathway plays a role in the cognitive dysfunction in patients with OSA via regulating neuroinflammation. We found that compared with control subjects, patients with OSA showed significantly elevated IL-33, ST2 and p65 nuclear factor-kappa B (NF-κB) levels in peripheral blood mononuclear cells (PBMCs) and inflammatory cytokines IL-6, IL-8 in serum, which were positively correlated with disease severity. Meanwhile, OSA patients exhibited a decline in Mini-Mental State Examination (MMSE) and Montreal Cognitive Assessment (MoCA) scores, suggesting mild cognitive impairment. Continuous positive airway pressure (CPAP) treatment for 12 weeks significantly decreased the expression of IL-33, ST2, p65NF-κB, IL-6 and IL-8, as well as improved cognitive function of OSA patients. Moreover, the IL-33/ST2 signaling was closely correlated with sleep respiratory parameters and cognitive dysfunction. To further explore the underlying mechanism of IL-33/ST2 signaling pathway, we stimulated human microglial clone 3 (HMC3) cells with lipopolysaccharide (LPS) to mimic neuroinflammatory response in vitro. The results showed that LPS treatment led to an increase in IL-33 and ST2 expression in a dose- dependent manner, along with an increased secretion of IL-6 and IL-8. Functional experiments showed that knockdown of IL-33 ameliorated LPS-induced neuroinflammation via suppressing NF-κB signaling. Overall, current findings suggest that IL-33/ST2 signaling participated in the cognitive impairment of OSA patients by promoting neuroinflammation via activating NF-κB signaling. These results may provide a novel therapeutic target for treating OSA- associated cognitive dysfunction.
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Affiliation(s)
- Chong Shen
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Research Unit of Respiratory Disease, Central South University, Changsha, Hunan 410011, China; Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, Hunan 410011, China
| | - Xiangming Liu
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Research Unit of Respiratory Disease, Central South University, Changsha, Hunan 410011, China; Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, Hunan 410011, China
| | - Ting Liu
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Research Unit of Respiratory Disease, Central South University, Changsha, Hunan 410011, China; Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, Hunan 410011, China
| | - Yanru Ou
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Research Unit of Respiratory Disease, Central South University, Changsha, Hunan 410011, China; Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, Hunan 410011, China
| | - Ruoyun Ouyang
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Research Unit of Respiratory Disease, Central South University, Changsha, Hunan 410011, China; Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, Hunan 410011, China.
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Muscat SM, Deems NP, Butler MJ, Scaria EA, Bettes MN, Cleary SP, Bockbrader RH, Maier SF, Barrientos RM. Selective TLR4 Antagonism Prevents and Reverses Morphine-Induced Persistent Postoperative Cognitive Dysfunction, Dysregulation of Synaptic Elements, and Impaired BDNF Signaling in Aged Male Rats. J Neurosci 2023; 43:155-172. [PMID: 36384680 PMCID: PMC9838714 DOI: 10.1523/jneurosci.1151-22.2022] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 11/07/2022] [Accepted: 11/10/2023] [Indexed: 11/18/2022] Open
Abstract
Perioperative neurocognitive disorders (PNDs) are characterized by confusion, difficulty with executive function, and episodic memory impairment in the hours to months following a surgical procedure. Postoperative cognitive dysfunction (POCD) represents such impairments that last beyond 30 d postsurgery and is associated with increased risk of comorbidities, progression to dementia, and higher mortality. While it is clear that neuroinflammation plays a key role in PND development, what factors underlie shorter self-resolving versus persistent PNDs remains unclear. We have previously shown that postoperative morphine treatment extends POCD from 4 d (without morphine) to at least 8 weeks (with morphine) in aged male rats, and that this effect is likely dependent on the proinflammatory capabilities of morphine via activation of toll-like receptor 4 (TLR4). Here, we extend these findings to show that TLR4 blockade, using the selective TLR4 antagonist lipopolysaccharide from the bacterium Rhodobacter sphaeroides (LPS-RS Ultrapure), ameliorates morphine-induced POCD in aged male rats. Using either a single central preoperative treatment or a 1 week postoperative central treatment regimen, we demonstrate that TLR4 antagonism (1) prevents and reverses the long-term memory impairment associated with surgery and morphine treatment, (2) ameliorates morphine-induced dysregulation of the postsynaptic proteins postsynaptic density 95 and synaptopodin, (3) mitigates reductions in mature BDNF, and (4) prevents decreased activation of the BDNF receptor TrkB (tropomyosin-related kinase B), all at 4 weeks postsurgery. We also reveal that LPS-RS Ultrapure likely exerts its beneficial effects by preventing endogenous danger signal HMGB1 (high-mobility group box 1) from activating TLR4, rather than by blocking continuous activation by morphine or its metabolites. These findings suggest TLR4 as a promising therapeutic target to prevent or treat PNDs.SIGNIFICANCE STATEMENT With humans living longer than ever, it is crucial that we identify mechanisms that contribute to aging-related vulnerability to cognitive impairment. Here, we show that the innate immune receptor toll-like receptor 4 (TLR4) is a key mediator of cognitive dysfunction in aged rodents following surgery and postoperative morphine treatment. Inhibition of TLR4 both prevented and reversed surgery plus morphine-associated memory impairment, dysregulation of synaptic elements, and reduced BDNF signaling. Together, these findings implicate TLR4 in the development of postoperative cognitive dysfunction, providing mechanistic insight and novel therapeutic targets for the treatment of cognitive impairments following immune challenges such as surgery in older individuals.
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Affiliation(s)
- Stephanie M Muscat
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio 43210
- Biomedical Sciences Graduate Program, The Ohio State University, Columbus, Ohio 43210
| | - Nicholas P Deems
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio 43210
- Neuroscience Graduate Program, The Ohio State University, Columbus, Ohio 43210
| | - Michael J Butler
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio 43210
| | - Emmanuel A Scaria
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio 43210
| | - Menaz N Bettes
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio 43210
| | - Sean P Cleary
- Campus Chemical Instrumentation Center, The Ohio State University, Columbus, Ohio 43210
| | - Ross H Bockbrader
- Pharmaceutical Sciences Graduate Program, Division of Medicinal Chemistry and Pharmacognosy, The Ohio State University, Columbus, Ohio 43210
| | - Steven F Maier
- Department of Psychology and Neuroscience, Center for Neuroscience, University of Colorado Boulder, Boulder, Colorado 80309
| | - Ruth M Barrientos
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio 43210
- Department of Psychiatry and Behavioral Health, The Ohio State University, Columbus, Ohio 43210
- Department of Neuroscience, The Ohio State University, Columbus, Ohio 43210
- Chronic Brain Injury Program, The Ohio State University, Columbus, Ohio 43210
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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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Zhou XG, Qiu WQ, Yu L, Pan R, Teng JF, Sang ZP, Law BYK, Zhao Y, Zhang L, Yan L, Tang Y, Sun XL, Wong VKW, Yu CL, Wu JM, Qin DL, Wu AG. Targeting microglial autophagic degradation of the NLRP3 inflammasome for identification of thonningianin A in Alzheimer’s disease. Inflamm Regen 2022; 42:25. [PMID: 35918778 PMCID: PMC9347127 DOI: 10.1186/s41232-022-00209-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 04/05/2022] [Indexed: 02/08/2023] Open
Abstract
Background NLRP3 inflammasome-mediated neuroinflammation plays a critical role in the pathogenesis and development of Alzheimer’s disease (AD). Microglial autophagic degradation not only decreases the deposits of extracellular Aβ fibrils but also inhibits the activation of NRLP3 inflammasome. Here, we aimed to identify the potent autophagy enhancers from Penthorum chinense Pursh (PCP) that alleviate the pathology of AD via inhibiting the NLRP3 inflammasome. Methods At first, autophagic activity-guided isolation was performed to identify the autophagy enhancers in PCP. Secondly, the autophagy effect was monitored by detecting LC3 protein expression using Western blotting and the average number of GFP-LC3 puncta per microglial cell using confocal microscopy. Then, the activation of NLRP3 inflammasome was measured by detecting the protein expression and transfected fluorescence intensity of NLRP3, ASC, and caspase-1, as well as the secretion of proinflammatory cytokines. Finally, the behavioral performance was evaluated by measuring the paralysis in C. elegans, and the cognitive function was tested by Morris water maze (MWM) in APP/PS1 mice. Results Four ellagitannin flavonoids, including pinocembrin-7-O-[4″,6″-hexahydroxydiphenoyl]-glucoside (PHG), pinocembrin-7-O-[3″-O-galloyl-4″,6″-hexahydroxydiphenoyl]-glucoside (PGHG), thonningianin A (TA), and thonningianin B (TB), were identified to be autophagy enhancers in PCP. Among these, TA exhibited the strongest autophagy induction effect, and the mechanistic study demonstrated that TA activated autophagy via the AMPK/ULK1 and Raf/MEK/ERK signaling pathways. In addition, TA effectively promoted the autophagic degradation of NLRP3 inflammasome in Aβ(1–42)-induced microglial cells and ameliorated neuronal damage via autophagy induction. In vivo, TA activated autophagy and improved behavioral symptoms in C. elegans. Furthermore, TA might penetrate the blood-brain barrier and could improve cognitive function and ameliorate the Aβ pathology and the NLRP3 inflammasome-mediated neuroinflammation via the AMPK/ULK1 and Raf/MEK/ERK signaling pathways in APP/PS1 mice. Conclusion We identified TA as a potent microglial autophagy enhancer in PCP that promotes the autophagic degradation of the NLRP3 inflammasome to alleviate the pathology of AD via the AMPK/ULK1 and Raf/MEK/ERK signaling pathways, which provides novel insights for TA in the treatment of AD. Supplementary Information The online version contains supplementary material available at 10.1186/s41232-022-00209-7.
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Zhou HY, Huai YP, Jin X, Yan P, Tang XJ, Wang JY, Shi N, Niu M, Meng ZX, Wang X. An enriched environment reduces hippocampal inflammatory response and improves cognitive function in a mouse model of stroke. Neural Regen Res 2022; 17:2497-2503. [PMID: 35535902 PMCID: PMC9120675 DOI: 10.4103/1673-5374.338999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
An enriched environment is used as a behavioral intervention therapy that applies sensory, motor, and social stimulation, and has been used in basic and clinical research of various neurological diseases. In this study, we established mouse models of photothrombotic stroke and, 24 hours later, raised them in a standard, enriched, or isolated environment for 4 weeks. Compared with the mice raised in a standard environment, the cognitive function of mice raised in an enriched environment was better and the pathological damage in the hippocampal CA1 region was remarkably alleviated. Furthermore, protein expression levels of tumor necrosis factor receptor-associated factor 6, nuclear factor κB p65, interleukin-6, and tumor necrosis factor α, and the mRNA expression level of tumor necrosis factor receptor-associated factor 6 were greatly lower, while the expression level of miR-146a-5p was higher. Compared with the mice raised in a standard environment, changes in these indices in mice raised in an isolated environment were opposite to mice raised in an enriched environment. These findings suggest that different living environments affect the hippocampal inflammatory response and cognitive function in a mouse model of stroke. An enriched environment can improve cognitive function following stroke through up-regulation of miR-146a-5p expression and a reduction in the inflammatory response.
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Affiliation(s)
- Hong-Yu Zhou
- Department of Rehabilitation Medicine, Northern Jiangsu People's Hospital Affiliated to Yangzhou University (Clinical Medical College, Yangzhou University), Yangzhou, Jiangsu Province, China
| | - Ya-Ping Huai
- Department of Rehabilitation Medicine, Shenzhen Longhua District Central Hospital, Shenzhen, Guangdong Province, China
| | - Xing Jin
- Department of Rehabilitation Medicine, Northern Jiangsu People's Hospital Affiliated to Yangzhou University (Clinical Medical College, Yangzhou University), Yangzhou, Jiangsu Province, China
| | - Ping Yan
- School of Nursing, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Xiao-Jia Tang
- Department of Rehabilitation Medicine, Northern Jiangsu People's Hospital Affiliated to Yangzhou University (Clinical Medical College, Yangzhou University), Yangzhou, Jiangsu Province, China
| | - Jun-Ya Wang
- Department of Rehabilitation Medicine, Northern Jiangsu People's Hospital Affiliated to Yangzhou University (Clinical Medical College, Yangzhou University), Yangzhou, Jiangsu Province, China
| | - Nan Shi
- School of Nursing, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Meng Niu
- Dalian Medical University, Dalian, Liaoning Province, China
| | - Zhao-Xiang Meng
- Department of Rehabilitation Medicine, Northern Jiangsu People's Hospital Affiliated to Yangzhou University (Clinical Medical College, Yangzhou University), Yangzhou, Jiangsu Province, China
| | - Xin Wang
- Department of Rehabilitation Medicine, Northern Jiangsu People's Hospital Affiliated to Yangzhou University (Clinical Medical College, Yangzhou University), Yangzhou, Jiangsu Province, China
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Lu B, Yuan H, Mo L, Sun D, Liu R, Zhou H, Zhai X, Wang R, Chen J, Meng B. Effects of different types of non-cardiac surgical trauma on hippocampus-dependent memory and neuroinflammation. Front Behav Neurosci 2022; 16:950093. [PMID: 36035019 PMCID: PMC9399929 DOI: 10.3389/fnbeh.2022.950093] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Accepted: 07/11/2022] [Indexed: 11/13/2022] Open
Abstract
Background Older individuals have been reported to suffer from cognitive disorders after surgery. Various types of surgical trauma have been used to establish postoperative cognitive dysfunction (POCD) animal models in preclinical studies. However, few comparative analyses of these animal models were conducted. Methods Tibial surgery, abdominal surgery, and extended abdominal surgery were performed on aged ICR mice to establish POCD models. Behavioral tests included open field, novel object recognition, fear conditioning, and Morris water maze tests. The Z-score methodology was adopted to obtain a comprehensive and integrated memory performance profile. The changes in hippocampal neuroinflammation were analyzed by ELISA, PCR, and immunofluorescence. Results In this study, we found that each type of non-cardiac surgical trauma has a different effects on locomotor activity. Tibial and extended abdominal surgeries led to more significant cognitive impairment than abdominal surgery. Inflammatory cytokines peaked on postoperative day 1 and decreased to control levels on days 3 and 7. Hippocampal neuroinflammation indicators between the three surgery types on postoperative day 1 had no statistical differences. Conclusion Overall, the type and intensity of non-cardiac surgical trauma can affect cognitive behavioral outcomes and central inflammation. The shortcomings and emerging issues of POCD animal research methods need to be further studied and solved.
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Affiliation(s)
- Bo Lu
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Hui Yuan
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Lan Mo
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Daofan Sun
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Rongjun Liu
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Han Zhou
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Xiaojie Zhai
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Ruichun Wang
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Junping Chen
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
- *Correspondence: Junping Chen,
| | - Bo Meng
- Department of Anesthesiology, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
- Bo Meng,
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Li Y, Wu ZY, Zheng WC, Wang JX, Yue-Xin, Song RX, Gao JG. Esketamine alleviates postoperative cognitive decline via stimulator of interferon genes/ TANK-binding kinase 1 signaling pathway in aged rats. Brain Res Bull 2022; 187:169-180. [PMID: 35839904 DOI: 10.1016/j.brainresbull.2022.07.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 06/17/2022] [Accepted: 07/11/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Postoperative cognitive decline (POCD) is a common complication after surgery and anesthesia among the elderly. Yet the potential mechanism of POCD remains ambiguous, with limited therapeutic measures currently available. Ketamine has been reported to attenuate POCD after cardiac surgery. Herein, we tried to determine the effect of esketamine (the S-enantiomer of ketamine) on POCD and the possible molecular mechanisms. METHODS We investigated the effects of esketamine (10 mg/kg) on POCD using an exploratory laparotomy model in aged SD rats (24 months). Open field, novel object recognition, and morris water maze tests were performed on day 30 post-surgery. 24 h or 30 d post-surgery, brain tissue from the hippocampus and ventromedial prefrontal cortex (vmPFC) was harvested and subjected to histopathology and molecular biology analysis. During the in vitro experiment, primary astrocytes from the hippocampus and vmPFC were exposed to lipopolysaccharide (LPS) to investigate the pathological changes in astrocytes during the process of POCD. RESULTS Our results indicated that exploratory laparotomy could induce significant cognitive and memory decline, accompanied by A2-type astrocytes phenotype loss and increased expression of neuron Aβ-42, astrocytes GABA, stimulator of interferon genes (STING) and TANK-binding kinase 1 (TBK1). In addition, LPS exposure significantly decreased the mitochondrial membrane potential and upregulated the level of pyroptosis-associated proteins, including cleaved caspase-1 and IL-18. Notably, treatment with esketamine reversed these abnormalities in vivo and vitro. However, ADU-S100, a special STING activator, suppressed the protective effects of esketamine to a certain extent. Finally, C-176, an antagonist of STING, further enhanced the protective effects of esketamine against POCD. CONCLUSIONS Findings of our study suggest that esketamine can alleviate surgery-induced POCD in rats via inhibition of the STING/TBK1 signaling pathway.
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Affiliation(s)
- Yan Li
- Department of Anesthesiology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China; Department of Anesthesiology, Cangzhou Central Hospital, Cangzhou, Hebei, China
| | - Zhi-You Wu
- Department of Neurosurgery, Cangzhou Central Hospital, Graduate School of Hebei Medical University, Heibei, China
| | - Wei-Chao Zheng
- Department of Anesthesiology, Cangzhou Central Hospital, Graduate School of Hebei Medical University, Heibei, China
| | - Jie-Xia Wang
- Department of Anesthesiology, Cangzhou Central Hospital, Graduate School of Hebei Medical University, Heibei, China
| | - Yue-Xin
- Department of Anesthesiology, Cangzhou Central Hospital, Graduate School of Hebei Medical University, Heibei, China
| | - Rong-Xin Song
- Department of Anesthesiology, Cangzhou Central Hospital, Graduate School of Hebei Medical University, Heibei, China
| | - Jin-Gui Gao
- Department of Anesthesiology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China.
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Wen Y, Feng S, Dai H, Mao M, Zhou Z, Li B, Wang C, Cai X, Li S, Yang J, Ren Q, Sun J. Intestinal dysbacteriosis-propelled T helper 17 cells activation mediate the perioperative neurocognitive disorder induced by anesthesia/surgery in aged rats. Neurosci Lett 2022; 783:136741. [PMID: 35716962 DOI: 10.1016/j.neulet.2022.136741] [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: 02/08/2022] [Revised: 04/18/2022] [Accepted: 06/13/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Perioperative neurocognitive disorders (PND) is a common postoperative disease in elderly patients, but its pathogenesis remains unclear. METHODS Exploratory laparotomy was performed to establish PND model under sevoflurane anesthesia. 16S rRNA high-throughput sequencing was used to detect the changes of intestinal flora. Antibiotics were used to relatively eliminate intestinal flora before anesthesia/surgery, and behavior tests, such as open field, Y maze, and fear conditioning tests were applied to detect the changes of memory ability. The number of Th17 cells and Foxp3 cells was detected by flow cytometry in the Peyer's patches (PP), mesenteric lymph nodes (MLN), blood and brain. Western blot was used to detect the expression of IL17, IL17RA, IL6 and IL10 in the hippocampus. Immunofluorescence was used to detect the expression of IL17, IL17R and IBA1 (ionized calcium binding adaptor molecule1) in the hippocampus. RESULTS Anesthesia/surgery caused intestinal flora imbalance and induced neurocognitive impairment, increased the number of Th17 cells in the PP, MLN, blood and brain, increased the level of IL17, IL17R and inflammatory factors production in the hippocampus. Antibiotics administration before anesthesia/surgery significantly decreased the number of Th17 cells and the level of IL17, IL17R and inflammatory factors production, and improved the memory function. In addition, we found that IL17R was co-labeled with IBA1 in a large amount in the hippocampus through immunofluorescence double-staining. CONCLUSION Our study suggested that intestinal dysbacteriosis-propelled T helper 17 cells activation and IL17 secretion might play an important role in the pathogenesis of PND induced by anesthesia/surgery in aged rats.
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Affiliation(s)
- Yazhou Wen
- Department of Anesthesiology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu 210009, China; Department of Anesthesiology, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, Jiangsu 210004, China
| | - Shanwu Feng
- Department of Anesthesiology, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, Jiangsu 210004, China
| | - Hongyu Dai
- Department of Anesthesiology, Nanjing Medical University, Nanjing, Jiangsu 210004, China
| | - Meng Mao
- Department of Anesthesiology, Nanjing Medical University, Nanjing, Jiangsu 210004, China
| | - Zhenhui Zhou
- Department of Anesthesiology, Nanjing Medical University, Nanjing, Jiangsu 210004, China
| | - Bin Li
- Department of Anesthesiology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu 210009, China
| | - Chaoran Wang
- Department of Anesthesiology, Nanjing Medical University, Nanjing, Jiangsu 210004, China
| | - Xuechun Cai
- Department of Anesthesiology, Nanjing Medical University, Nanjing, Jiangsu 210004, China
| | - Shuming Li
- Department of Anesthesiology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu 210009, China
| | - Jiaojiao Yang
- Department of Anesthesiology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu 210009, China
| | - Quan Ren
- Department of Anesthesiology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu 210009, China.
| | - Jie Sun
- Department of Anesthesiology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu 210009, China.
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Chen J, Ding Q, Jiao X, Wang B, Sun Z, Zhang Y, Zhao J. Dexmedetomidine attenuates hippocampal neuroinflammation in postoperative neurocognitive disorders by inhibiting microRNA-329-3p and activating the CREB1/IL1RA axis. Psychopharmacology (Berl) 2022; 239:2171-2186. [PMID: 35412062 DOI: 10.1007/s00213-022-06091-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 02/14/2022] [Indexed: 11/24/2022]
Abstract
RATIONALE Due to its anti-inflammatory effect, dexmedetomidine (DEX) can confer neuroprotection in postoperative neurocognitive disorders (NCD). Here, the mechanism responsible for this effect of DEX is rarely ascertained. OBJECTIVES Our research was implemented to figure out mechanism governing the protection of DEX against hippocampal neuroinflammation in postoperative NCD. METHODS Exploratory laparotomy was applied for generating a postoperative NCD mouse model before bilateral hippocampal injection with microRNA (miR)-329-3p-agomir and intraperitoneal injection with DEX. Cognitive function of mice was evaluated by water maze test and fear conditioning test. Immunofluorescence was performed to assess microglial activation in hippocampus. After cell transfection and DEX treatment, mouse microglial cells (BV-2) were stimulated by lipopolysaccharide (LPS). IL-1β, IL-6, and TNF-α levels and the number of phagocytes were assessed by ELISA and flow cytometry. Dual-luciferase reporter assay was adopted to assess the relationship between miR-329-3p and CREB1. RESULTS miR-329-3p expression was reduced in the postoperative NCD mice after DEX treatment. DEX treatment or miR-329-3p downregulation caused attenuated cognitive dysfunction and microglia activation as well as reduced IL-1β, IL-6, and TNF-α levels in the hippocampus of the postoperative NCD mice. Mechanistically, miR-329-3p inversely targeted CREB1 that activated IL1RA in LPS-induced BV-2 cells. DEX treatment, miR-329-3p inhibition, or CREB1 or IL1RA upregulation curtailed the release of proinflammatory proteins and the number of phagocytes in LPS-induced BV-2 cells. CONCLUSIONS Collectively, our data provided the novel insight of the neuroprotective mechanism of DEX in postoperative NCD pertaining to the miR-329-3p/CREB1/IL1RA axis.
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Affiliation(s)
- Jinquan Chen
- Anesthesia Operation Center, The First Peoples Hospital of Xianyang, Xianyang, 712000, People's Republic of China
| | - Qian Ding
- Anesthesia Operation Center, Xi´an International Medical Center Hospital, No. 777, Xitai Road, 710100, Xi´an, People's Republic of China
| | - Xiangxue Jiao
- Anesthesia Operation Center, The First Peoples Hospital of Xianyang, Xianyang, 712000, People's Republic of China
| | - Binrong Wang
- Anesthesia Operation Center, Xi´an International Medical Center Hospital, No. 777, Xitai Road, 710100, Xi´an, People's Republic of China
| | - Zhenzhong Sun
- Department of Anesthesiology, Guangdong Armed Police Corps Hospital, Guangzhou, 510507, People's Republic of China
| | - Yutao Zhang
- Anesthesia Operation Center, Xi´an International Medical Center Hospital, No. 777, Xitai Road, 710100, Xi´an, People's Republic of China
| | - Juan Zhao
- Anesthesia Operation Center, Xi´an International Medical Center Hospital, No. 777, Xitai Road, 710100, Xi´an, People's Republic of China.
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Wei P, Lyu W, Xu L, Feng H, Zhou H, Li J. α7 Nicotinic Acetylcholine Receptor May Be a Pharmacological Target for Perioperative Neurocognitive Disorders. Front Pharmacol 2022; 13:907713. [PMID: 35721159 PMCID: PMC9204176 DOI: 10.3389/fphar.2022.907713] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 05/16/2022] [Indexed: 12/03/2022] Open
Abstract
Background: The α7 nicotinic acetylcholine receptor (α7nAChR) is a promising therapeutic target in neurodegenerative diseases. This study examined the effects of surgery and anesthesia on α7nAChR expression in the central nervous system and determined the mechanisms by which α7nAChR mediates neuroprotection in perioperative neurocognitive disorders (PNDs) in aged mice. Methods: Eighteen-month-old male C57BL/6J mice underwent aseptic laparotomy under isoflurane anesthesia, maintaining spontaneous ventilation to establish the PNDs model. Agonists and antagonists of the α7nAChR and tropomyosin receptor kinase B (TrkB) receptors were administered before anesthesia. The α7nAChR expression, peripheral as well as hippocampal interleukin-1β (IL-1β), and the brain-derived neurotrophic factor (BDNF) levels were assessed. Separate cohorts of aged mice were tested for cognitive decline using the Morris water maze (MWM). Results: Surgery and anesthesia significantly suppressed α7nAChR expression in the hippocampus and cortex. Surgery-induced IL-1β upregulation in the serum as well as hippocampus and hippocampal microglial activation were reversed by the α7nAChR agonist. A significant reduction in the hippocampal BDNF levels were also observed. The α7nAChR stimulation reversed, and α7nAChR suppression promoted BDNF reduction in the hippocampus. Blocking the BDNF/TrkB signaling pathway abolished α7nAChR-induced neuroprotection in PNDs, as evidenced by poor cognitive performance in the MWM test. Conclusions: These data reveal that α7nAChR plays a key role in PNDs. The mechanisms of the anti-inflammatory pathway and BDNF/TrkB signaling pathways are involved in α7nAChR-meidiated neuroprotection in PNDs.
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Affiliation(s)
- Penghui Wei
- Department of Anesthesiology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China
| | - Wenyuan Lyu
- Department of Anesthesiology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China
| | - Lin Xu
- Department of Anesthesiology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China
- Department of Anesthesiology, Qilu Hospital of Shandong University, Jinan, China
| | - Hao Feng
- Department of Anesthesiology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China
| | - Haipeng Zhou
- Department of Anesthesiology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China
| | - Jianjun Li
- Department of Anesthesiology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China
- *Correspondence: Jianjun Li,
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Zhang Z, Ma Q, Velagapudi R, Barclay WE, Rodriguiz RM, Wetsel WC, Yang T, Shinohara ML, Terrando N. Annexin-A1 Tripeptide Attenuates Surgery-Induced Neuroinflammation and Memory Deficits Through Regulation the NLRP3 Inflammasome. Front Immunol 2022; 13:856254. [PMID: 35603196 PMCID: PMC9120413 DOI: 10.3389/fimmu.2022.856254] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 04/01/2022] [Indexed: 01/05/2023] Open
Abstract
Neuroinflammation is a growing hallmark of perioperative neurocognitive disorders (PNDs), including delirium and longer-lasting cognitive deficits. We have developed a clinically relevant orthopedic mouse model to study the impact of a common surgical procedure on the vulnerable brain. The mechanism underlying PNDs remains unknown. Here we evaluated the impact of surgical trauma on the NLRP3 inflammasome signaling, including the expression of apoptosis-associated speck-like protein containing a CARD (ASC), caspase-1, and IL-1β in the hippocampus of C57BL6/J male mice, adult (3-months) and aged (>18-months). Surgery triggered ASC specks formation in CA1 hippocampal microglia, but without inducing significant morphological changes in NLRP3 and ASC knockout mice. Since no therapies are currently available to treat PNDs, we assessed the neuroprotective effects of a biomimetic peptide derived from the endogenous inflammation-ending molecule, Annexin-A1 (ANXA1). We found that this peptide (ANXA1sp) inhibited postoperative NLRP3 inflammasome activation and prevented microglial activation in the hippocampus, reducing PND-like memory deficits. Together our results reveal a previously under-recognized role of hippocampal ANXA1 and NLRP3 inflammasome dysregulation in triggering postoperative neuroinflammation, offering a new target for advancing treatment of PNDs through the resolution of inflammation.
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Affiliation(s)
- Zhiquan Zhang
- Department of Anesthesiology, Duke University Medical Center, Durham, NC, United States,*Correspondence: Zhiquan Zhang, ; Niccolò Terrando,
| | - Qing Ma
- Department of Anesthesiology, Duke University Medical Center, Durham, NC, United States
| | - Ravikanth Velagapudi
- Department of Anesthesiology, Duke University Medical Center, Durham, NC, United States
| | - William E. Barclay
- Department of Immunology, Duke University Medical Center, Durham, NC, United States
| | - Ramona M. Rodriguiz
- Department of Psychiatry and Behavioral Sciences, Mouse Behavioral and Neuroendocrine Analysis Core Facility, Duke University Medical Center, Durham, NC, United States
| | - William C. Wetsel
- Department of Psychiatry and Behavioral Sciences, Mouse Behavioral and Neuroendocrine Analysis Core Facility, Duke University Medical Center, Durham, NC, United States,Department of Neurobiology, Duke University Medical Center, Durham, NC, United States,Department of Cell Biology, Duke University Medical Center, Durham, NC, United States
| | - Ting Yang
- Department of Medicine, Division of Nephrology, Duke University Medical Center, Durham, NC, United States
| | - Mari L. Shinohara
- Department of Immunology, Duke University Medical Center, Durham, NC, United States,Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC, United States
| | - Niccolò Terrando
- Department of Anesthesiology, Duke University Medical Center, Durham, NC, United States,Department of Immunology, Duke University Medical Center, Durham, NC, United States,Department of Cell Biology, Duke University Medical Center, Durham, NC, United States,*Correspondence: Zhiquan Zhang, ; Niccolò Terrando,
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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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Jiang W, Liu F, Li H, Wang K, Cao X, Xu X, Zhou Y, Zou J, Zhang X, Cui X. TREM2 ameliorates anesthesia and surgery-induced cognitive impairment by regulating mitophagy and NLRP3 inflammasome in aged C57/BL6 mice. Neurotoxicology 2022; 90:216-227. [PMID: 35447280 DOI: 10.1016/j.neuro.2022.04.005] [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: 01/08/2022] [Revised: 04/12/2022] [Accepted: 04/13/2022] [Indexed: 11/25/2022]
Abstract
Postoperative cognitive dysfunction (POCD) is a major postoperative complication. Triggering receptor expressed on myeloid cells 2 (TREM2) exerts a neuroprotective function against neuro-inflammatory responses. The present study investigated the role of TREM2 in anesthesia and surgery-induced cognitive impairment and the potential related mechanism. Our results revealed that TREM2 was downregulated, coupled with activation of the NLRP3 inflammasome and subsequent IL-1β expression on postoperative day 3. A corresponding decline in PSD-95 and BDNF was found at the same time point. The key regulator of mitophagy PINK1 and Parkin protein levels were significantly decreased following surgery and anesthesia. TREM2 overexpression partially reversed postoperative cognitive impairment and enhanced PSD-95 and BDNF expression. TREM2 overexpression also improved mitophagy function and inhibited activation of the NLRP3 inflammasome and associated production of IL-1β. Our findings demonstrate that TREM2 rescues anesthesia and surgery-induced spatial learning and memory impairment and neuro-inflammation in aged C57/BL6 mice, which may be at least partially mediated through the activation of mitophagy and subsequent inhibition of the NLRP3 inflammasome.
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Affiliation(s)
- Wenwen Jiang
- Department of Anesthesiology, the First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Fang Liu
- Department of Neurology, the First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Hongqing Li
- Department of Anesthesiology, the First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Kexin Wang
- Department of Anesthesiology, the First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xuezhao Cao
- Department of Anesthesiology, the First Hospital of China Medical University, Shenyang, Liaoning, China.
| | - Xiaohan Xu
- Department of Anesthesiology, the First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yongjian Zhou
- Department of Anesthesiology, the First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Jie Zou
- Department of Anesthesiology, the First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xinyue Zhang
- Department of Anesthesiology, the First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xiaotong Cui
- Department of Anesthesiology, the First Hospital of China Medical University, Shenyang, Liaoning, China
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Zhang MX, Lin JR, Yang ST, Zou J, Xue Y, Feng CZ, Cao L. Characterization of circRNA-Associated-ceRNA Networks Involved in the Pathogenesis of Postoperative Cognitive Dysfunction in Aging Mice. Front Aging Neurosci 2022; 14:727805. [PMID: 35444525 PMCID: PMC9014220 DOI: 10.3389/fnagi.2022.727805] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Accepted: 02/23/2022] [Indexed: 11/24/2022] Open
Abstract
Postoperative cognitive dysfunction (POCD) is a clinical entity associated with declined cognitive function following surgery. It occurs more frequently in elderly patients. Recent studies have shown that circRNA-associated-ceRNA networks, constructed based on interactions between circRNA-miRNA and miRNA-mRNA, provide key insight into the molecular mechanisms underlying the pathogenesis of several neurological diseases. However, the mechanism of POCD remains undetermined. In this study, laparotomies were performed under isoflurane anesthesia on young (2-month-old) and aging (17-month-old) male C57BL/6 mice. The results showed that the aging mice were more likely than the young mice to develop POCD. Subsequently, differentially expressed circRNAs, miRNAs, and mRNAs were characterized by RNA sequencing the hippocampi of young and aging mice under control and surgery conditions. Six circRNAs, 6 miRNAs, and 203 mRNAs were identified to construct the circRNA-associated-ceRNA network for the control condition, while 13 circRNAs, 8 miRNAs, and 189 mRNAs were used for the circRNA-associated-ceRNA network for the surgery condition. Further Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis of these two networks revealed that the circRNA-associated-ceRNA networks are involved in POCD pathogenesis though modulating the Wnt and VEGF signaling pathways, as well as neural processes associated with long-term synaptic depression and synaptic transmission. In particular, the mmu-miR-298-5P regulatory pathway identified in this study’s mouse model suggests that mm9_circ_009789- and mm9_circ_004229-associated-ceRNA networks as closely related to the occurrence of POCD through regulating PKC signaling pathway, neural cell apoptosis and glycolipid metabolism pathway. These findings provide possible insight into the role of the circRNA-associated-ceRNA networks, helping to unravel the complexity of the molecular pathogenesis of POCD.
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Affiliation(s)
- Meng-Xue Zhang
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jing-Run Lin
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shu-Ting Yang
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jun Zou
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yao Xue
- School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou, China
| | - Chen-Zhuo Feng
- School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou, China
- *Correspondence: Chen-Zhuo Feng,
| | - Lin Cao
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
- Lin Cao,
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Li Z, Zhu Y, Kang Y, Qin S, Chai J. Neuroinflammation as the Underlying Mechanism of Postoperative Cognitive Dysfunction and Therapeutic Strategies. Front Cell Neurosci 2022; 16:843069. [PMID: 35418837 PMCID: PMC8995749 DOI: 10.3389/fncel.2022.843069] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Accepted: 02/28/2022] [Indexed: 12/11/2022] Open
Abstract
Postoperative cognitive dysfunction (POCD) is a common neurological complication following surgery and general anesthesia, especially in elderly patients. Severe cases delay patient discharge, affect the patient’s quality of life after surgery, and are heavy burdens to society. In addition, as the population ages, surgery is increasingly used for older patients and those with higher prevalences of complications. This trend presents a huge challenge to the current healthcare system. Although studies on POCD are ongoing, the underlying pathogenesis is still unclear due to conflicting results and lack of evidence. According to existing studies, the occurrence and development of POCD are related to multiple factors. Among them, the pathogenesis of neuroinflammation in POCD has become a focus of research in recent years, and many clinical and preclinical studies have confirmed the correlation between neuroinflammation and POCD. In this article, we reviewed how central nervous system inflammation occurred, and how it could lead to POCD with changes in peripheral circulation and the pathological pathways between peripheral circulation and the central nervous system (CNS). Furthermore, we proposed some potential therapeutic targets, diagnosis and treatment strategies at the cellular and molecular levels, and clinical applications. The goal of this article was to provide a better perspective for understanding the occurrence of POCD, its development, and preventive strategies to help manage these vulnerable geriatric patients.
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Affiliation(s)
- Zhichao Li
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Youzhuang Zhu
- Department of Anesthesiology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yihan Kang
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Shangyuan Qin
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Jun Chai
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, China
- *Correspondence: Jun Chai,
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Liu L, Zhang X, Wang C, Wu X, Long B. Hypercholesterolemia aggravates sevoflurane-induced cognitive impairment in aged rats by inducing neurological inflammation and apoptosis. J Biochem Mol Toxicol 2022; 36:e23009. [PMID: 35174938 DOI: 10.1002/jbt.23009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 12/28/2021] [Accepted: 01/04/2022] [Indexed: 12/30/2022]
Abstract
We aimed to explore the effects of hypercholesterolemia on sevoflurane-induced cognitive impairment in aged rats and the underlying mechanism(s). Aged rats were administrated with high-fat diet, sevoflurane, or both. Thereafter, the plasma levels of total cholesterol (TC), triglyceride (TG), low-density lipoprotein (LDL), and high-density lipoprotein (HDL) were evaluated. The Morris water maze task was performed to evaluate the spatial learning and memory ability of rats. Moreover, Nissl and Evans blue staining were conducted to test nerve damage and detect the blood-brain barrier permeability, respectively. The percentage of apoptotic cells was evaluated by terminal deoxynucleotidyl transferase dUTP nick end labeling assay. The messenger RNA expression of inflammatory factors and protein expression of microglial activation markers and apoptosis-related proteins were tested by real-time polymerase chain reaction, enzyme-linked immunosorbent assay, or western blot analysis, respectively. High-fat diet induced high levels of TC, TG, and LDL but decreased levels of HDL. However, sevoflurane had no effects on these levels. In contrast, sevoflurane significantly induced the impairment of learning and memory, nerve damage, neuroinflammatory damage, and neuronal apoptosis. Hypercholesterolemia exacerbated the sevoflurane-induced impairment in aged rats. These results suggested that hypercholesterolemia aggravates sevoflurane-induced cognitive impairment in aged rats, possibly by inducing neurological inflammation and apoptosis.
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Affiliation(s)
- Lidan Liu
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xin Zhang
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Cong Wang
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xiuying Wu
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Bo Long
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
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Fu C, Lin J, Gong G, Zhong W, Chen H, Luo X. Inflammatory markers in postoperative cognitive dysfunction for patients undergoing total hip arthroplasty: a meta-analysis. Aging Clin Exp Res 2022; 34:277-288. [PMID: 34176086 DOI: 10.1007/s40520-021-01919-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 06/17/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUND Postoperative cognitive dysfunction (POCD) is a poorly understood disorder, very common even after total hip arthroplasty (THA). It is widely considered that inflammation response play a role in the pathogenesis of POCD. AIMS The aim of the present study was to investigate whether inflammation cytokine concentrations could serve as biomarkers for POCD in patients undergoing THA. METHODS A systematic search of databases was conducted to retrieve publications measuring circulating inflammatory markers of patients with and without POCD after THA. Inflammatory markers identified in more than two studies were pooled. The standardized mean difference (SMD) and the 95% confidence interval (95% CI) were calculated for each outcome. Fail-safe N statistics was calculated to estimate possible publication bias. RESULTS The pooled incidence rate of POCD after THA by combining 11 cohort studies was 31%. A total of five inflammatory markers, CRP, S-100B, IL-1β, IL-6 and TNF-α, were assessed. Significantly higher pre-operative CRP (P = 0.012) and S-100B (P < 0.0001) as well as post-operative CPR (P = 0.005) and IL-6 (P < 0.0001) at 6 h were found in POCD compared with non-POCD patients undergoing THA. Fail-safe N statistics revealed that these results are robust. DISCUSSION The current evidence suggests that some of the inflammatory markers, including CRP, S-100B, and IL-6, were correlated with the occurrence of POCD after THA. CONCLUSION Monitor of inflammatory markers might help early diagnosis of POCD after THA and development of preventive strategies.
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Affiliation(s)
- Chunmei Fu
- Department of Anesthesiology, Chaonan Minsheng Hospital of Shantou, National Highway 324, Xiashan Liannan Town, Chaonan District, Shantou, 515100, China
| | - Jincheng Lin
- Department of Anesthesiology, The First Affiliated Hospital of Shantou University Medical College, No. 57 Changping Road, Chuangdong, Shantou, 515041, China
| | - Guoliang Gong
- Department of Pathology, Chaonan Minsheng Hospital of Shantou, National Highway 324, Xiashan Liannan Town, Chaonan District, Shantou, 515100, China
- Department of Pathology, The First Affiliated Hospital of Shantou University Medical College, No. 57 Changping Road, Chuangdong, Shantou, 515041, China
| | - Weibin Zhong
- Department of Anesthesiology, Chaonan Minsheng Hospital of Shantou, National Highway 324, Xiashan Liannan Town, Chaonan District, Shantou, 515100, China
| | - Haihong Chen
- Department of Anesthesiology, Chaonan Minsheng Hospital of Shantou, National Highway 324, Xiashan Liannan Town, Chaonan District, Shantou, 515100, China
| | - Xiaowei Luo
- Department of Pathology, The First Affiliated Hospital of Shantou University Medical College, No. 57 Changping Road, Chuangdong, Shantou, 515041, China
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Zhang X, Wu W, Luo Y, Wang Z. Transcranial photobiomodulation therapy ameliorates perioperative neurocognitive disorder through modulation of mitochondrial function in aged mice. Neuroscience 2021; 490:236-249. [PMID: 34979260 DOI: 10.1016/j.neuroscience.2021.12.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/22/2021] [Accepted: 12/24/2021] [Indexed: 01/06/2023]
Abstract
Perioperative neurocognitive disorder (PND) is a serious nervous system complication characterized by progressive cognitive impairment, especially in geriatric population. However, the neuropathogenesis of PND is complex, and there are no approved disease-modifying therapeutic options. Mitochondrial dysfunction has been demonstrated to contribute to the occurrence and development of PND. Transcranial near-infrared (tNIR) light treatment helps to improve mitochondrial dysfunction and enhance cognition, but its effect on PND remains unclear. Here, we evaluated the effect of tNIR light treatment on PND caused by anesthesia and surgery in aged mice. We built the PND models with 18-month C57BL/6 male mice by exploratory laparotomy under isoflurane inhalation anesthesia, and treated by tNIR light with wavelength 810 nm for 2 weeks. The short-term and long-term changes in cognitive function were analyzed by behavioral tests. We further explored the effects of tNIR light on mitochondria, synapses, neurons, and signaling pathways through different experimental methods. The results demonstrated that the cognitive impairment and mitochondrial dysfunction in PND mice were ameliorated after tNIR light treatment. Further experiments demonstrated that photobiomodulation therapy (PBMT) increased synapse-related protein expression, neuronal survival, and protected synapse from depletion. Moreover, downregulated sirtuin 1 (SIRT1) and peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α) were increased after tNIR light treatment. Our results suggested that tNIR light was an effective treatment of PND through PBMT effect, accompanied by synaptic and neuronal improvement. The improvement of mitochondrial dysfunction mediated by SIRT1/PGC-1α signaling pathway might participate in this process. Those findings might provide a novel and noninvasive therapeutic target for PND.
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Affiliation(s)
- Xiaojun Zhang
- Department of Anesthesiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Wensi Wu
- Department of Anesthesiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Yuelian Luo
- Department of Anesthesiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Zhi Wang
- Department of Anesthesiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China.
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Research Progress on the Role of Inflammatory Mechanisms in the Development of Postoperative Cognitive Dysfunction. BIOMED RESEARCH INTERNATIONAL 2021; 2021:3883204. [PMID: 34869762 PMCID: PMC8642009 DOI: 10.1155/2021/3883204] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 10/19/2021] [Accepted: 11/11/2021] [Indexed: 12/15/2022]
Abstract
Postoperative cognitive dysfunction (POCD), as one of the common postoperative complications, mainly occurs after surgery and anesthesia, especially in the elderly. It refers to cognitive function changes such as decreased learning and memory ability and inability to concentrate. In severe cases, there could be personality changes and a decline in social behavior. At present, a great deal of research had been carried out on POCD, but its specific mechanism remains unclear. The release of peripheral inflammation-related factors, the degradation and destruction of the blood-brain barrier, the occurrence of central inflammation, and the neuronal apoptosis and synaptic loss could be promoted by neuroinflammation indicating that inflammatory mechanisms may play key roles in the occurrence of POCD.
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Butler MJ, Deems NP, Muscat S, Butt CM, Belury MA, Barrientos RM. Dietary DHA prevents cognitive impairment and inflammatory gene expression in aged male rats fed a diet enriched with refined carbohydrates. Brain Behav Immun 2021; 98:198-209. [PMID: 34425209 PMCID: PMC8511052 DOI: 10.1016/j.bbi.2021.08.214] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 08/02/2021] [Accepted: 08/07/2021] [Indexed: 12/12/2022] Open
Abstract
The consumption of a processed foods diet (PD) enriched with refined carbohydrates, saturated fats, and lack of fiber has increased in recent decades and likely contributed to increased incidence of chronic disease and weight gain in humans. These diets have also been shown to negatively impact brain health and cognitive function in rodents, non-human primates, and humans, potentially through neuroimmune-related mechanisms. However, mechanisms by which PD impacts the aged brain are unknown. This gap in knowledge is critical, considering the aged brain has a heightened state of baseline inflammation, making it more susceptible to secondary challenges. Here, we showed that consumption of a PD, enriched with refined carbohydrate sources, for 28 days impaired hippocampal- and amygdalar-dependent memory function in aged (24 months), but not young (3 months) F344 × BN rats. These memory deficits were accompanied by increased expression of inflammatory genes, such as IL-1β, CD11b, MHC class II, CD86, NLRP3, and complement component 3, in the hippocampus and amygdala of aged rats. Importantly, we also showed that when the same PD is supplemented with the omega-3 polyunsaturated fatty acid DHA, these memory deficits and inflammatory gene expression changes were ameliorated in aged rats, thus providing the first evidence that DHA supplementation can protect against memory deficits and inflammatory gene expression in aged rats fed a processed foods diet. Lastly, we showed that while PD consumption increased weight gain in both young and aged rats, this effect was exaggerated in aged rats. Aging was also associated with significant alterations in hypothalamic gene expression, with no impact by DHA on weight gain or hypothalamic gene expression. Together, our data provide novel insights regarding diet-brain interactions by showing that PD consumption impairs cognitive function likely through a neuroimmune mechanism and that dietary DHA can ameliorate this phenomenon.
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Affiliation(s)
- Michael J Butler
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, USA
| | - Nicholas P Deems
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, USA
| | - Stephanie Muscat
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, USA
| | | | - Martha A Belury
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, USA; Department of Human Sciences, Ohio State University, Columbus, OH, USA
| | - Ruth M Barrientos
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, USA; Department of Psychiatry and Behavioral Health, Ohio State University, Columbus, OH, USA; Department of Neuroscience, The Ohio State University, Columbus, OH, USA; Chronic Brain Injury Program, Discovery Themes Initiative, The Ohio State University, Columbus, OH, USA.
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Yang S, Zhang S, Tang W, Fang S, Zhang H, Zheng J, Liu X, Zhang Y, Zhao L, Huang L, Li B. Enriched Environment Prevents Surgery-Induced Persistent Neural Inhibition and Cognitive Dysfunction. Front Aging Neurosci 2021; 13:744719. [PMID: 34658844 PMCID: PMC8517535 DOI: 10.3389/fnagi.2021.744719] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 09/03/2021] [Indexed: 11/21/2022] Open
Abstract
Perioperative neurocognitive disorders (PND) encompass short-term delirium and long-term cognitive dysfunction. Aging increases the susceptibility to PND, yet the neural mechanism is not known. In this study, we monitored the dynamic changes of neuronal activity in the prelimbic cortex before and after surgery. We found that anesthesia combined with surgery, but not anesthesia alone, induced a prolonged decrease in neuronal activity during the post-operation period in the aged mice, but not in the adult mice. The prolonged decrease in neuronal activity was accompanied by surgery-induced microglial activation and proinflammatory cytokines expression. Importantly, we found that the enriched environment (EE) completely prevented both the prolonged neural inhibition and neuroinflammation, and improved cognitive function in the aged mice. These results indicate that the prolonged neural inhibition correlated to PND and that EE before the surgery could effectively alleviate the surgery- induced cognitive dysfunction.
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Affiliation(s)
- Shana Yang
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Neuroscience Program, Zhongshan School of Medicine and the Fifth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Song Zhang
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Neuroscience Program, Zhongshan School of Medicine and the Fifth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wenting Tang
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Neuroscience Program, Zhongshan School of Medicine and the Fifth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shunchang Fang
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Neuroscience Program, Zhongshan School of Medicine and the Fifth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Hongyang Zhang
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Neuroscience Program, Zhongshan School of Medicine and the Fifth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jieyan Zheng
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Neuroscience Program, Zhongshan School of Medicine and the Fifth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xia Liu
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Neuroscience Program, Zhongshan School of Medicine and the Fifth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Ying Zhang
- Department of Spine Surgery, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Liang Zhao
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Lianyan Huang
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Neuroscience Program, Zhongshan School of Medicine and the Fifth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Boxing Li
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Neuroscience Program, Zhongshan School of Medicine and the Fifth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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45
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Zhu H, Cong L, Chen Y, Chen S, Chen L, Huang Z, Zhou J, Xiao J, Huang Y, Su D. Efficiency of donepezil in elderly patients undergoing orthopaedic surgery due to underlying post-operative cognitive dysfunction: study protocol for a multicentre randomised controlled trial. Trials 2021; 22:688. [PMID: 34627332 PMCID: PMC8501596 DOI: 10.1186/s13063-021-05648-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 09/20/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Post-operative cognitive dysfunction (POCD) is an overarching term used to describe cognitive impairment identified in the preoperative or post-operative period. After surgical operations, older patients are particularly vulnerable to memory disturbances and other types of cognitive impairment. However, the pathogenesis of POCD remains unclear with no confirmed preventable or treatable strategy available. Our previous study demonstrated that the concentration of choline acetyl transferase in the cerebral spinal fluid was a predictive factor of POCD and that donepezil, which is an acetylcholinesterase inhibitor used in clinical settings for the treatment of Alzheimer's disease, can prevent learning and memory impairment after anaesthesia/surgery in aged mice. This study aimed to determine the critical role of donepezil in preventing cognitive impairment in elderly patients undergoing orthopaedic surgery. METHODS A multicentre, double-blind, placebo-controlled, crossover clinical trial will be performed to assess the efficacy of donepezil in elderly patients undergoing orthopaedic surgery. Participants (n = 360) will receive donepezil (5 mg once daily) or placebo from 1 day prior to surgery until 5 days after surgery. Neuropsychological tests will be measured at 1 day before the operation and 1 week, 1 month, 6 months and 1 year after the operation. DISCUSSION This research project mainly aimed to study the effects of donepezil in elderly patients undergoing orthopaedic surgery due to underlying POCD and to investigate the underlying physiological and neurobiological mechanisms of these effects. The results may provide important implications for the development of effective interfering strategies, specifically regarding cognitive dysfunction therapy using drugs. TRIAL REGISTRATION ClinicalTrials.gov NCT04423276 . Registered on 14 June 2020.
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Affiliation(s)
- Huichen Zhu
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Lu Cong
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Yi Chen
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Shaoyi Chen
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Lingke Chen
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Zhenling Huang
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Jie Zhou
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Jie Xiao
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Yonglei Huang
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China.
| | - Diansan Su
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China.
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Hovens IB, van Leeuwen BL, Falcao-Salles J, de Haan JJ, Schoemaker RG. Enteral enriched nutrition to prevent cognitive dysfunction after surgery; a study in rats. Brain Behav Immun Health 2021; 16:100305. [PMID: 34589797 PMCID: PMC8474614 DOI: 10.1016/j.bbih.2021.100305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/17/2021] [Accepted: 07/24/2021] [Indexed: 11/26/2022] Open
Abstract
Background Inflammation plays an important role in postoperative cognitive dysfunction (POCD), particularly in elderly patients. Enteral enriched nutrition was shown to inhibit the response on inflammatory stimuli. Aim of the present study was to explore the therapeutic potential of enteral enriched nutrition in our rat model for POCD. The anticipated mechanism of action was examined in young rats, while responses in the target group of elderly patients were evaluated in old rats. Methods Male 3 and 23 months old Wistar rats received a bolus of enteral fat/protein-enriched nutrition 2 h and 30 min before surgery. The inflammatory response was evaluated by systemic inflammation markers and brain microglia activity. Additionally, in old rats, the role of the gut-brain axis was studied by microbiome analyses of faecal samples. Days 9–14 after surgery, rats were subjected to cognitive testing. Day 16, rats were sacrificed and brains were collected for immunohistochemistry. Results In young rats, enriched nutrition improved long-term spatial learning and memory in the Morris Water Maze, reduced plasma IL1-β and VEGF levels, but left microglia activity and neurogenesis unaffected. In contrast, in old rats, enriched nutrition improved short-term memory in the novel object- and novel location recognition tests, but impaired development of long-term memory in the Morris Water Maze. Systemic inflammation was not affected, but microglia activity seemed even increased. Gut integrity and microbiome were not affected. Conclusion Enteral enriched nutrition before surgery in young rats indeed reduced systemic inflammation and improved cognitive performance after surgery, whereas old rats showed a mixed favorable/unfavorable cognitive response, without effect on systemic inflammation. Anti-inflammatory effects of enriched nutrition were not reflected in decreased microglia activity. Neither was an important role for the gut-brain axis observed. Since the relatively straight forward effects of enriched nutrition in young rats could not be shown in old rats, as indicated by a mixed beneficial/detrimental cognitive outcome in the latter, caution is advised by translating effects seen in younger patients to older ones. Enriched nutrition reduced inflammation after surgery in young rats. Enriched nutrition improved postoperative cognitive outcome in young rats. Enteral enriched nutrition did not inhibit neuroinflammation. Effects in young rats do not predict effects in old rats. Enteral enriched nutrition caused mixed improved/declined cognition in old rats.
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Affiliation(s)
- Iris B Hovens
- Department of Neurobiology, GELIFES, University of Groningen, Netherlands
| | | | - Joana Falcao-Salles
- Department of Microbial Ecology, GELIFES, University of Groningen, Netherlands
| | - Jacco J de Haan
- Department of Medical Oncology, University Medical Center Groningen, Netherlands
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Porcher L, Bruckmeier S, Burbano SD, Finnell JE, Gorny N, Klett J, Wood SK, Kelly MP. Aging triggers an upregulation of a multitude of cytokines in the male and especially the female rodent hippocampus but more discrete changes in other brain regions. J Neuroinflammation 2021; 18:219. [PMID: 34551810 PMCID: PMC8459490 DOI: 10.1186/s12974-021-02252-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 08/25/2021] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND Despite widespread acceptance that neuroinflammation contributes to age-related cognitive decline, studies comparing protein expression of cytokines in the young versus old brains are surprisingly limited in terms of the number of cytokines and brain regions studied. Complicating matters, discrepancies abound-particularly for interleukin 6 (IL-6)-possibly due to differences in sex, species/strain, and/or the brain regions studied. METHODS As such, we clarified how cytokine expression changes with age by using a Bioplex and Western blot to measure multiple cytokines across several brain regions of both sexes, using 2 mouse strains bred in-house as well as rats obtained from NIA. Parametric and nonparametric statistical tests were used as appropriate. RESULTS In the ventral hippocampus of C57BL/6J mice, we found age-related increases in IL-1α, IL-1β, IL-2, IL-3, IL-4, IL-6, IL-9, IL-10, IL-12p40, IL-12p70, IL-13, IL-17, eotaxin, G-CSF, interfeuron δ, KC, MIP-1a, MIP-1b, rantes, and TNFα that are generally more pronounced in females, but no age-related change in IL-5, MCP-1, or GM-CSF. We also find aging is uniquely associated with the emergence of a module (a.k.a. network) of 11 strongly intercorrelated cytokines, as well as an age-related shift from glycosylated to unglycosylated isoforms of IL-10 and IL-1β in the ventral hippocampus. Interestingly, age-related increases in extra-hippocampal cytokine expression are more discreet, with the prefrontal cortex, striatum, and cerebellum of male and female C57BL/6J mice demonstrating robust age-related increase in IL-6 expression but not IL-1β. Importantly, we found this widespread age-related increase in IL-6 also occurs in BALB/cJ mice and Brown Norway rats, demonstrating conservation across species and rearing environments. CONCLUSIONS Thus, age-related increases in cytokines are more pronounced in the hippocampus compared to other brain regions and can be more pronounced in females versus males depending on the brain region, genetic background, and cytokine examined.
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Affiliation(s)
- Latarsha Porcher
- Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA
| | - Sophie Bruckmeier
- Department of Anatomy & Neurobiology, University of Maryland School of Medicine, 20 Penn St, HSFII Rm 216, Baltimore, MD, 21201, USA
| | - Steven D Burbano
- Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA
| | - Julie E Finnell
- Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA
| | - Nicole Gorny
- Department of Anatomy & Neurobiology, University of Maryland School of Medicine, 20 Penn St, HSFII Rm 216, Baltimore, MD, 21201, USA
| | - Jennifer Klett
- Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA
| | - Susan K Wood
- Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA
| | - Michy P Kelly
- Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA. .,Department of Anatomy & Neurobiology, University of Maryland School of Medicine, 20 Penn St, HSFII Rm 216, Baltimore, MD, 21201, USA. .,Center for Research on Aging, University of Maryland School of Medicine, 20 Penn St, HSFII Rm 216, Baltimore, MD, 21201, USA.
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48
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Xie X, Shen Z, Hu C, Zhang K, Guo M, Wang F, Qin K. Dexmedetomidine Ameliorates Postoperative Cognitive Dysfunction in Aged Mice. Neurochem Res 2021; 46:2415-2426. [PMID: 34159456 DOI: 10.1007/s11064-021-03386-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 06/17/2021] [Accepted: 06/19/2021] [Indexed: 12/20/2022]
Abstract
Neuroinflammation and oxidative stress coexist and interact in the progression of postoperative cognitive dysfunction (POCD) and other neurodegenerative disease. Mounting studies reveal that Dexmedetomidine (Dex) possesses anti-inflammatory and antioxidant properties. Nevertheless, whether Dex exerts neuroprotective effect on the cognitive sequelae of oxidative stress and inflammatory process remains unclear. A mouse model of abdominal exploratory laparotomy-induced cognitive dysfunction was employed to explore the underlying mechanism of neuroprotective effects exerted by Dex in POCD. Aged mice were treated with Dex (20 µg/kg) 20 min prior to surgery. Open field test (OFT) and Morris water maze (MWM) were employed to examine the cognitive function on postoperative day 3 (POD 3) or POD 7. In the present study, mice underwent surgery exhibited cognitive impairment without altering spontaneous locomotor activity, while the surgery-induced cognitive impairment could be alleviated by Dex pretreatment. Dex inhibited surgery-induced pro-inflammatory cytokines accumulation and microglial activation in the hippocampi of mice. Furthermore, Dex decreased MDA levels, enhanced SOD activity, modulated CDK5 activity and increased BDNF expression in the hippocampus. In addition, Dex remarkably reduced the surgery-induced increased ratio of Bax/Bcl-2 and apoptotic neurons in the hippocampi of aged mice. Collectively, our study provides evidence that Dex may exert neuroprotective effects against surgery-induced cognitive impairment through mechanisms involving its anti-inflammatory and antioxidant properties, as well as the suppression on the mitochondrial permeability transition pore and apoptosis-related pathway.
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Affiliation(s)
- Xiaolan Xie
- Department of Anesthesiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
| | - Zhiwen Shen
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Chuwen Hu
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Kun Zhang
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Mingyan Guo
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Fei Wang
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China.
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China.
| | - Kai Qin
- Department of Anesthesiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120, China.
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Estfanous S, Daily KP, Eltobgy M, Deems NP, Anne MNK, Krause K, Badr A, Hamilton K, Carafice C, Hegazi A, Abu Khweek A, Kelani H, Nimjee S, Awad H, Zhang X, Cormet-Boyaka E, Haffez H, Soror S, Mikhail A, Nuovo G, Barrientos RM, Gavrilin MA, Amer AO. Elevated Expression of MiR-17 in Microglia of Alzheimer's Disease Patients Abrogates Autophagy-Mediated Amyloid-β Degradation. Front Immunol 2021; 12:705581. [PMID: 34426734 PMCID: PMC8379081 DOI: 10.3389/fimmu.2021.705581] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 06/30/2021] [Indexed: 01/18/2023] Open
Abstract
Autophagy is a proposed route of amyloid-β (Aβ) clearance by microglia that is halted in Alzheimer’s Disease (AD), though mechanisms underlying this dysfunction remain elusive. Here, primary microglia from adult AD (5xFAD) mice were utilized to demonstrate that 5xFAD microglia fail to degrade Aβ and express low levels of autophagy cargo receptor NBR1. In 5xFAD mouse brains, we show for the first time that AD microglia express elevated levels of microRNA cluster Mirc1/Mir17-92a, which is known to downregulate autophagy proteins. By in situ hybridization in post-mortem AD human tissue sections, we observed that the Mirc1/Mir17-92a cluster member miR-17 is also elevated in human AD microglia, specifically in the vicinity of Aβ deposits, compared to non-disease controls. We show that NBR1 expression is negatively correlated with expression of miR-17 in human AD microglia via immunohistopathologic staining in human AD brain tissue sections. We demonstrate in healthy microglia that autophagy cargo receptor NBR1 is required for Aβ degradation. Inhibiting elevated miR-17 in 5xFAD mouse microglia improves Aβ degradation, autophagy, and NBR1 puncta formation in vitro and improves NBR1 expression in vivo. These findings offer a mechanism behind dysfunctional autophagy in AD microglia which may be useful for therapeutic interventions aiming to improve autophagy function in AD.
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Affiliation(s)
- Shady Estfanous
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, Ohio State University, Columbus, OH, United States.,Biochemistry and Molecular Biology Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Kylene P Daily
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, Ohio State University, Columbus, OH, United States
| | - Mostafa Eltobgy
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, Ohio State University, Columbus, OH, United States
| | - Nicholas P Deems
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, United States
| | - Midhun N K Anne
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, Ohio State University, Columbus, OH, United States
| | - Kathrin Krause
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, Ohio State University, Columbus, OH, United States.,Max Planck Unit for the Science of Pathogens, Berlin, Germany
| | - Asmaa Badr
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, Ohio State University, Columbus, OH, United States
| | - Kaitlin Hamilton
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, Ohio State University, Columbus, OH, United States
| | - Cierra Carafice
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, Ohio State University, Columbus, OH, United States
| | - Ahmad Hegazi
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, Ohio State University, Columbus, OH, United States
| | - Arwa Abu Khweek
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, Ohio State University, Columbus, OH, United States.,Department of Biology and Biochemistry, Birzeit University, West Bank, Palestine
| | - Hesham Kelani
- Department of Anesthesiology, Wexner Medical Center, The Ohio State University, Columbus, OH, United States
| | - Shahid Nimjee
- Department of Neurological Surgery, Wexner Medical Center, The Ohio State University, Columbus, OH, United States
| | - Hamdy Awad
- Department of Anesthesiology, Wexner Medical Center, The Ohio State University, Columbus, OH, United States
| | - Xiaoli Zhang
- Center for Biostatistics, Ohio State University, Columbus, OH, United States
| | - Estelle Cormet-Boyaka
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States
| | - Hesham Haffez
- Biochemistry and Molecular Biology Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt.,Center of Excellence, Helwan Structure Biology Research, Cairo, Egypt
| | - Sameh Soror
- Biochemistry and Molecular Biology Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt.,Center of Excellence, Helwan Structure Biology Research, Cairo, Egypt
| | - Adel Mikhail
- GNOME DIAGNOSTICS, Department of Scientific Research, Powell, OH, United States
| | - Gerard Nuovo
- GNOME DIAGNOSTICS, Department of Scientific Research, Powell, OH, United States
| | - Ruth M Barrientos
- Institute for Behavioral Medicine Research, Ohio State University, Columbus, OH, United States
| | - Mikhail A Gavrilin
- Department of Internal Medicine, Ohio State University, Columbus, OH, United States
| | - Amal O Amer
- Department of Microbial Infection and Immunity, Infectious Diseases Institute, The Heart and Lung Research Institute, Ohio State University, Columbus, OH, United States
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50
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Muscat SM, Barrientos RM. The Perfect Cytokine Storm: How Peripheral Immune Challenges Impact Brain Plasticity & Memory Function in Aging. Brain Plast 2021; 7:47-60. [PMID: 34631420 PMCID: PMC8461734 DOI: 10.3233/bpl-210127] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Precipitous declines in cognitive function can occur in older individuals following a variety of peripheral immune insults, such as surgery, infection, injury, and unhealthy diet. Aging is associated with numerous changes to the immune system that shed some light on why this abrupt cognitive deterioration may occur. Normally, peripheral-to-brain immune signaling is tightly regulated and advantageous; communication between the two systems is bi-directional, via either humoral or neural routes. Following an immune challenge, production, secretion, and translocation of cytokines into the brain is critical to the development of adaptive sickness behaviors. However, aging is normally associated with neuroinflammatory priming, notably microglial sensitization. Microglia are the brain's innate immune cells and become sensitized with advanced age, such that upon immune stimulation they will mount more exaggerated neuroimmune responses. The resultant elevation of pro-inflammatory cytokine expression, namely IL-1β, has profound effects on synaptic plasticity and, consequentially, cognition. In this review, we (1) investigate the processes which lead to aberrantly elevated inflammatory cytokine expression in the aged brain and (2) examine the impact of the pro-inflammatory cytokine IL-1β on brain plasticity mechanisms, including its effects on BDNF, AMPA and NMDA receptor-mediated long-term potentiation.
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Affiliation(s)
- Stephanie M Muscat
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
- Biomedical Sciences Graduate Program, The Ohio State University, Columbus, OH, USA
| | - Ruth M Barrientos
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
- Department of Psychiatry and Behavioral Health, The Ohio State University, Columbus, OH, USA
- Department of Neuroscience, The Ohio State University, Columbus, OH, USA
- Chronic Brain Injury Program, Discovery Themes Initiative, The Ohio State University, Columbus, OH, USA
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