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Zhang Y, Zhao Y, Wang Y, Li J, Huang Y, Lyu F, Wang Y, Wei P, Yuan Y, Fu Y, Gao Y. Microglial histone deacetylase 2 is dispensable for functional and histological outcomes in a mouse model of traumatic brain injury. J Cereb Blood Flow Metab 2024; 44:817-835. [PMID: 38069842 PMCID: PMC11197137 DOI: 10.1177/0271678x231197173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 08/08/2023] [Accepted: 08/08/2023] [Indexed: 04/26/2024]
Abstract
The Class-I histone deacetylases (HDACs) mediate microglial inflammation and neurological dysfunction after traumatic brain injury (TBI). However, whether the individual Class-I HDACs play an indispensable role in TBI pathogenesis remains elusive. HDAC2 has been shown to upregulate pro-inflammatory genes in myeloid cells under brain injuries such as intracerebral hemorrhage, thereby worsening outcomes. Thus, we hypothesized that HDAC2 drives microglia toward a pro-inflammatory neurotoxic phenotype in a murine model of controlled cortical impact (CCI). Our results revealed that HDAC2 expression was highly induced in CD16/CD32+ pro-inflammatory microglia 3 and 7d after TBI. Surprisingly, microglia-targeted HDAC2 knockout (HDAC2 miKO) mice failed to demonstrate a beneficial phenotype after CCI/TBI compared to their wild-type (WT) littermates. HDAC2 miKO mice exhibited comparable levels of grey and white matter injury, efferocytosis, and sensorimotor and cognitive deficits after CCI/TBI as WT mice. RNA sequencing of isolated microglia 3d after CCI/TBI indicated the elevation of a panel of pro-inflammatory cytokines/chemokines in HDAC2 miKO mice over WT mice, and flow cytometry showed further elevated brain infiltration of neutrophils and B cells in HDAC2 miKO mice. Together, this study does not support a detrimental role for HDAC2 in microglial responses after TBI and calls for investigation into alternative mechanisms.
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Affiliation(s)
- Yue Zhang
- State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, and Institutes of Brain Science, Fudan University, Shanghai, China
| | - Yongfang Zhao
- State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, and Institutes of Brain Science, Fudan University, Shanghai, China
| | - Yana Wang
- State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, and Institutes of Brain Science, Fudan University, Shanghai, China
| | - Jiaying Li
- State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, and Institutes of Brain Science, Fudan University, Shanghai, China
| | - Yichen Huang
- State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, and Institutes of Brain Science, Fudan University, Shanghai, China
| | - Fan Lyu
- State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, and Institutes of Brain Science, Fudan University, Shanghai, China
| | - Yangfan Wang
- State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, and Institutes of Brain Science, Fudan University, Shanghai, China
| | - Pengju Wei
- State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, and Institutes of Brain Science, Fudan University, Shanghai, China
| | - Yiwen Yuan
- State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, and Institutes of Brain Science, Fudan University, Shanghai, China
| | - Yi Fu
- Department of Neurology & Institute of Neurology, Rui Jin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yanqin Gao
- State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, and Institutes of Brain Science, Fudan University, Shanghai, China
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Davoody S, Asgari Taei A, Khodabakhsh P, Dargahi L. mTOR signaling and Alzheimer's disease: What we know and where we are? CNS Neurosci Ther 2024; 30:e14463. [PMID: 37721413 PMCID: PMC11017461 DOI: 10.1111/cns.14463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/28/2023] [Accepted: 08/29/2023] [Indexed: 09/19/2023] Open
Abstract
Despite the great body of research done on Alzheimer's disease, the underlying mechanisms have not been vividly investigated. To date, the accumulation of amyloid-beta plaques and tau tangles constitutes the hallmark of the disease; however, dysregulation of the mammalian target of rapamycin (mTOR) seems to be significantly involved in the pathogenesis of the disease as well. mTOR, as a serine-threonine protein kinase, was previously known for controlling many cellular functions such as cell size, autophagy, and metabolism. In this regard, mammalian target of rapamycin complex 1 (mTORC1) may leave anti-aging impacts by robustly inhibiting autophagy, a mechanism that inhibits the accumulation of damaged protein aggregate and dysfunctional organelles. Formation and aggregation of neurofibrillary tangles and amyloid-beta plaques seem to be significantly regulated by mTOR signaling. Understanding the underlying mechanisms and connection between mTOR signaling and AD may suggest conducting clinical trials assessing the efficacy of rapamycin, as an mTOR inhibitor drug, in managing AD or may help develop other medications. In this literature review, we aim to elaborate mTOR signaling network mainly in the brain, point to gaps of knowledge, and define how and in which ways mTOR signaling can be connected with AD pathogenesis and symptoms.
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Affiliation(s)
- Samin Davoody
- Student Research Committee, School of MedicineShahid Beheshti University of Medical SciencesTehranIran
| | - Afsaneh Asgari Taei
- Neuroscience Research CenterShahid Beheshti University of Medical SciencesTehranIran
| | - Pariya Khodabakhsh
- Department of NeurophysiologyInstitute of Physiology, Eberhard Karls University of TübingenTübingenGermany
| | - Leila Dargahi
- Neurobiology Research CenterShahid Beheshti University of Medical SciencesTehranIran
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Liu M, Wang D, Xu L, Pan Y, Huang H, Li M, Liu Q. Group 2 innate lymphoid cells suppress neuroinflammation and brain injury following intracerebral hemorrhage. J Cereb Blood Flow Metab 2024; 44:355-366. [PMID: 37933727 PMCID: PMC10870958 DOI: 10.1177/0271678x231208168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 09/15/2023] [Accepted: 09/20/2023] [Indexed: 11/08/2023]
Abstract
Intracerebral hemorrhage (ICH) mobilizes circulating leukocytes that contribute to neuroinflammation and neural injury. However, little is known about the endogenous regulatory immune mechanisms to restrict neuroinflammation following ICH. We examined the role of group 2 innate lymphoid cells (ILC2) that are a specialized subset of innate immune modulators in a mouse model of ICH. We found accumulation of ILC2 in the brain following acute ICH and a concomitant increase of ILC2 within the peripheral lymph nodes. Depletion of ILC2 exacerbated neurodeficits and brain edema after ICH in male and female mice. This aggravated ICH injury was accompanied by augmented microglia activity and leukocyte infiltration. In contrast, expansion of ILC2 using IL-33 led to reduced ICH injury, microglia activity and leukocyte infiltration. Notably, elimination of microglia using a colony stimulating factor 1 receptor inhibitor diminished the exacerbation of ICH injury induced by depletion of ILC2. Brain-infiltrating ILC2 had upregulation of IL-13 after ICH. Results from in vitro assays revealed that ILC2 suppressed thrombin-induced inflammatory activity in microglia-like BV2 cells. Thus, our findings demonstrate that ILC2 suppress neuroinflammation and acute ICH injury.
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Affiliation(s)
- Mingming Liu
- Department of Neurology, Tianjin Neurological Institute, Tianjin Institute of Immunology, State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Tianjin Medical University General Hospital, Tianjin, China
| | - Danni Wang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Institute of Immunology, State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Tianjin Medical University General Hospital, Tianjin, China
- Department of Neurology, The Second Hospital of Shandong University, Jinan, China
| | - Lin Xu
- Department of Neurology, Tianjin Neurological Institute, Tianjin Institute of Immunology, State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Tianjin Medical University General Hospital, Tianjin, China
| | - Yan Pan
- Department of Neurology, Tianjin Neurological Institute, Tianjin Institute of Immunology, State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Tianjin Medical University General Hospital, Tianjin, China
| | - Huachen Huang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Institute of Immunology, State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Tianjin Medical University General Hospital, Tianjin, China
| | - Minshu Li
- Department of Neurology, Tianjin Neurological Institute, Tianjin Institute of Immunology, State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Tianjin Medical University General Hospital, Tianjin, China
| | - Qiang Liu
- Department of Neurology, Tianjin Neurological Institute, Tianjin Institute of Immunology, State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Tianjin Medical University General Hospital, Tianjin, China
- Department of Neurology, The Second Hospital of Shandong University, Jinan, China
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Yang C, Wang Y, Li Y, Wang X, Hua W, Yang Z, Wang H. Sub-dose anesthetics combined with chloride regulators protect the brain against chronic ischemia-hypoxia injury. CNS Neurosci Ther 2024; 30:e14379. [PMID: 37545014 PMCID: PMC10848060 DOI: 10.1111/cns.14379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 07/11/2023] [Accepted: 07/13/2023] [Indexed: 08/08/2023] Open
Abstract
BACKGROUND Cerebral ischemia-hypoxia leads to excitotoxicity-mediated neuronal damage and cognitive dysfunction, especially in the elderly. Excessive intracellular [Cl- ]i accumulation weakens γ-aminobutyric acid (GABA) compensatory effects. Sub-anesthetic dose of propofol protected the brain against ischemia-hypoxia, which was abolished by blocking Cl- efflux transporter K+ /Cl- cotransporter 2 (KCC2). We aimed to determine whether low-dose anesthetic combined with [Cl- ]i regulators could restore the compensatory GABAergic system and improve cognitive function. METHODS Chronic cerebral hypoxia (CCH) model was established by bilateral carotid artery ligation in aged rats. Sub-dose of anesthetics (propofol and sevoflurane) with or without KCC2 agonist N-ethylmaleimide (NEM) or Na+ /K+ /Cl- cotransporter 1 (NKCC1) antagonist bumetanide (BTN) was administered systemically 30 days post-surgery. Primary rat hippocampal neuronal cultures were subjected to hypoxic injury with or without drug treatment. Memory function, hippocampal neuronal survival, GABAergic system functioning, and brain-derived neurotrophic factor (BDNF) expressions were evaluated. RESULTS Sub-anesthetic dose of combined propofol (1.2 μg mL-1 ) and sevoflurane [0.7 MAC (minimum alveolar concentration)] did not aggravate the hypoxic brain injury in rats or cell damage in neuronal cultures. Adding either BTN or NEM protected against hypoxic injury, associated with improved cognitive function in vivo, less intracellular accumulation of [Cl- ]i , reduced cell death, restored GABAergic compensation, and increased BDNF expression both in vivo and in vitro. CONCLUSION Sub-anesthetic dose of propofol and sevoflurane is a recommended anesthesia regimen in at-risk patients. Restoration of [Cl- ]i homeostasis and GABAergic could further reduce the brain damage caused by ischemia-hypoxia.
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Affiliation(s)
- Chenyi Yang
- Nankai UniversityTianjinChina
- Nankai University Affinity the Third Central HospitalTianjinChina
- The Third Central Clinical College of Tianjin Medical UniversityTianjinChina
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical DiseasesTianjinChina
- Artificial Cell Engineering Technology Research CenterTianjinChina
- Tianjin Institute of Hepatobiliary DiseaseTianjinChina
| | - Ye Wang
- The Third Central Clinical College of Tianjin Medical UniversityTianjinChina
| | - Yun Li
- The Third Central Clinical College of Tianjin Medical UniversityTianjinChina
| | - Xinyi Wang
- Nankai University Affinity the Third Central HospitalTianjinChina
- The Third Central Clinical College of Tianjin Medical UniversityTianjinChina
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical DiseasesTianjinChina
- Artificial Cell Engineering Technology Research CenterTianjinChina
- Tianjin Institute of Hepatobiliary DiseaseTianjinChina
| | - Wei Hua
- Nankai University Affinity the Third Central HospitalTianjinChina
- The Third Central Clinical College of Tianjin Medical UniversityTianjinChina
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical DiseasesTianjinChina
- Artificial Cell Engineering Technology Research CenterTianjinChina
- Tianjin Institute of Hepatobiliary DiseaseTianjinChina
| | | | - Haiyun Wang
- Nankai UniversityTianjinChina
- Nankai University Affinity the Third Central HospitalTianjinChina
- The Third Central Clinical College of Tianjin Medical UniversityTianjinChina
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical DiseasesTianjinChina
- Artificial Cell Engineering Technology Research CenterTianjinChina
- Tianjin Institute of Hepatobiliary DiseaseTianjinChina
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5
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Jia J, Xu S, Hu J, Gan Y, Sun M, Xia S, Bao X, Zhang M, Xu Y. Growth arrest specific protein 6 alleviated white matter injury after experimental ischemic stroke. J Cereb Blood Flow Metab 2024; 44:77-93. [PMID: 37794790 PMCID: PMC10905636 DOI: 10.1177/0271678x231205078] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 09/09/2023] [Accepted: 09/11/2023] [Indexed: 10/06/2023]
Abstract
Ischemic white matter injury leads to long-term neurological deficits and lacks effective medication. Growth arrest specific protein 6 (Gas6) clears myelin debris, which is hypothesized to promote white matter integrity in experimental stroke models. By the middle cerebral artery occlusion (MCAO) stroke model, we observed that Gas6 reduced infarcted volume and behavior deficits 4 weeks after MCAO. Compared with control mice, Gas6-treatment mice represented higher FA values in the ipsilateral external capsules by MRI DTI scan. The SMI32/MBP ratio of the ipsilateral cortex and striatum was profoundly alleviated by Gas6 administration. Gas6-treatment group manifested thicker myelin sheaths than the control group by electron microscopy. We observed that Gas6 mainly promoted OPC maturation, which was closely related to microglia. Mechanically, Gas6 accelerated microglia-mediated myelin debris clearance and cholesterol transport protein expression (abca1, abcg1, apoc1, apoe) in vivo and in vitro, accordingly less myelin debris and lipid deposited in Gas6 treated stroke mice. HX531 (RXR inhibitor) administration mitigated the functions of Gas6 in speeding up debris clearance and cholesterol transport protein expression. Generally, we concluded that Gas6 cleared myelin debris and promoted cholesterol transportation protein expression through activating RXR, which could be one critical mechanism contributing to white matter repair after stroke.
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Affiliation(s)
- Junqiu Jia
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Siyi Xu
- Department of Neurology, Nanjing Drum Tower Hospital Clinical College of Jiangsu University, Zhenjiang, China
| | - Jinglong Hu
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Yonghui Gan
- Department of Neurology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, China
| | - Min Sun
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Shengnan Xia
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Xinyu Bao
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Meijuan Zhang
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
- Department of Neurology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, China
- Department of Neurology, Nanjing Drum Tower Hospital, State Key Laboratory of Pharmaceutical Biotechnology and Institute of Translational Medicine for Brain Critical Diseases, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, China
- Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, China
- Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, China
| | - Yun Xu
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
- Department of Neurology, Nanjing Drum Tower Hospital Clinical College of Jiangsu University, Zhenjiang, China
- Department of Neurology, Nanjing Drum Tower Hospital, State Key Laboratory of Pharmaceutical Biotechnology and Institute of Translational Medicine for Brain Critical Diseases, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, China
- Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, China
- Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, China
- Jiangsu Provincial medical key discipline, Nanjing, China
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6
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Connelly JA, Zhang X, Chen Y, Chao Y, Shi Y, Jacob TC, Wang QJ. Protein kinase D2 confers neuroprotection by promoting AKT and CREB activation in ischemic stroke. Neurobiol Dis 2023; 187:106305. [PMID: 37730136 PMCID: PMC10836334 DOI: 10.1016/j.nbd.2023.106305] [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: 06/18/2023] [Revised: 09/12/2023] [Accepted: 09/16/2023] [Indexed: 09/22/2023] Open
Abstract
Ischemic stroke, constituting 80-90% of all strokes, is a leading cause of death and long-term disability in adults. There is an urgent need to discover new targets and therapies for this devastating condition. Protein kinase D (PKD), as a key target of diacylglycerol involved in ischemic responses, has not been well studied in ischemic stroke, particularly PKD2. In this study, we found that PKD2 expression and activity were significantly upregulated in the ipsilateral side of the brain after transient focal cerebral ischemia, which coincides with the upregulation of PKD2 in primary neurons in response to in vitro ischemia, implying a potential role of PKD2 in neuronal survival in ischemic stroke. Using kinase-dead PKD2 knock-in (PKD2-KI) mice, we examined whether loss of PKD2 activity affected stroke outcomes in mice subjected to 1 h of transient middle cerebral artery occlusion (tMCAO) and 24 h of reperfusion. Our data demonstrated that PKD2-KI mice exhibited larger infarction volumes and worsened neurological scores, indicative of increased brain injury, as compared to the wild-type (WT) mice, confirming a neuroprotective role of PKD2 in ischemia/reperfusion (I/R) injury. Mouse primary neurons obtained from PKD2-KI mice also exhibited increased cell death as compared to the WT neurons when subjected to in vitro ischemia. We have further identified AKT and CREB as two main signaling nodes through which PKD2 regulates neuronal survival during I/R injury. In summary, PKD2 confers neuroprotection in ischemic stroke by promoting AKT and CREB activation and targeted activation of PKD2 may benefit neuronal survival in ischemic stroke.
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Affiliation(s)
- Jaclyn A Connelly
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, USA
| | - Xuejing Zhang
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, USA
| | - Yuzhou Chen
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, USA
| | - Yapeng Chao
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, USA
| | - Yejie Shi
- Department of Neurology, University of Pittsburgh, Pittsburgh, USA
| | - Tija C Jacob
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, USA
| | - Q Jane Wang
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, USA.
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Jiang S, Wan Q, Wang X, Di L, Li X, Kang R, Li S, Huang L. LXA4 attenuates perioperative neurocognitive disorders by suppressing neuroinflammation and oxidative stress. Int Immunopharmacol 2023; 123:110788. [PMID: 37591120 DOI: 10.1016/j.intimp.2023.110788] [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: 05/20/2023] [Revised: 07/05/2023] [Accepted: 08/08/2023] [Indexed: 08/19/2023]
Abstract
Perioperative neurocognitive disorder (PND) is a common complication that increases morbidity and mortality in elderly patients undergoing surgery. Abnormal microglia activation causes neuroinflammation and contributes to the development of PND. Growing evidence shows that lipoxin A4 (LXA4), a lipid mediator, possesses potent anti-inflammatory activities. In this study, we investigated whether LXA4 exerted a protective effect against surgery-induced neurocognitive deficits and explored the underlying mechanisms. Mice were subjected to laparotomy under sevoflurane anesthesia to establish an animal model of PND. LXA4 (15 μg/kg/d, ip) was administered three days prior surgery. We showed that LXA4 significantly alleviated surgery-induced cognitive impairments, attenuated neuroinflammation and microglial activation in hippocampus. In BV2 microglial cells treated with LPS (100 ng/mL), pre-application of LXA4 (100 nΜ) significantly inhibited M1 polarization and promoted M2 polarization, and decreased the levels of pro-inflammatory cytokines (IL-1β, TNF-α, IL-6) and increased the levels of anti-inflammatory cytokine (IL-10). LXA4 also mitigated LPS-regulated expression of HO-1, NOX2, and SOD1, elevated SOD activity, and attenuated ROS production. Furthermore, we revealed that LXA4 increased the expression of SIRT1 and decreased the protein level of acetylated NF-κB p65. SIRT1 inhibitor EX-527 abolished the anti-inflammatory and antioxidant response effects of LXA4 in BV2 microglial cells. Hence, LXA4 is a potential therapeutic agent for surgery-induced neuroinflammation, oxidative stress, and cognitive deficit, and the effect of LXA4 is probably mediated by the activation of the SIRT1/NF-κB signaling pathway in microglia.
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Affiliation(s)
- Sufang Jiang
- Department of Anesthesiology, The Second Hospital of Hebei Medical University, No 215 Heping West Road, Shijiazhuang, Hebei, China
| | - Qian Wan
- Department of Anesthesiology, The Second Hospital of Hebei Medical University, No 215 Heping West Road, Shijiazhuang, Hebei, China
| | - Xueji Wang
- Department of Anesthesiology, The Second Hospital of Hebei Medical University, No 215 Heping West Road, Shijiazhuang, Hebei, China
| | - Lichao Di
- Department of Anesthesiology, The Second Hospital of Hebei Medical University, No 215 Heping West Road, Shijiazhuang, Hebei, China
| | - Xuze Li
- Department of Anesthesiology, The Second Hospital of Hebei Medical University, No 215 Heping West Road, Shijiazhuang, Hebei, China
| | - Rongtian Kang
- Department of Anesthesiology, The Second Hospital of Hebei Medical University, No 215 Heping West Road, Shijiazhuang, Hebei, China
| | - Sha Li
- Neuroscience Research Center, Hebei Medical University, Shijiazhuang, Hebei, China; Hebei Key Laboratory of Neurodegenerative Disease Mechanism, Shijiazhuang, Hebei, China.
| | - Lining Huang
- Department of Anesthesiology, The Second Hospital of Hebei Medical University, No 215 Heping West Road, Shijiazhuang, Hebei, China; The Key Laboratory of Neurology, Ministry of Education.
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Dounavi ME, Mak E, Swann P, Low A, Muniz-Terrera G, McKeever A, Pope M, Williams GB, Wells K, Lawlor B, Naci L, Malhotra P, Mackay C, Koychev I, Ritchie K, Su L, Ritchie CW, O’Brien JT. Differential association of cerebral blood flow and anisocytosis in APOE ε4 carriers at midlife. J Cereb Blood Flow Metab 2023; 43:1672-1684. [PMID: 37132287 PMCID: PMC10581239 DOI: 10.1177/0271678x231173587] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 03/31/2023] [Accepted: 04/05/2023] [Indexed: 05/04/2023]
Abstract
Cerebral hemodynamic alterations have been observed in apolipoprotein ε4 (APOE4) carriers at midlife, however the physiological underpinnings of this observation are poorly understood. Our goal was to investigate cerebral blood flow (CBF) and its spatial coefficient of variation (CoV) in relation to APOE4 and a measure of erythrocyte anisocytosis (red blood cell distribution width - RDW) in a middle-aged cohort. Data from 563 participants in the PREVENT-Dementia study scanned with 3 T MRI cross-sectionally were analysed. Voxel-wise and region-of-interest analyses within nine vascular regions were run to detect areas of altered perfusion. Within the vascular regions, interaction terms between APOE4 and RDW in predicting CBF were examined. Areas of hyperperfusion in APOE4 carriers were detected mainly in frontotemporal regions. The APOE4 allele differentially moderated the association between RDW and CBF, an association which was more prominent in the distal vascular territories (p - [0.01, 0.05]). The CoV was not different between the considered groups. We provide novel evidence that in midlife, RDW and CBF are differentially associated in APOE4 carriers and non-carriers. This association is consistent with a differential hemodynamic response to hematological alterations in APOE4 carriers.
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Affiliation(s)
- Maria-Eleni Dounavi
- Department of Psychiatry, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Elijah Mak
- Department of Psychiatry, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Peter Swann
- Department of Psychiatry, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Audrey Low
- Department of Psychiatry, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | | | - Anna McKeever
- Department of Psychiatry, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Marianna Pope
- Department of Psychiatry, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Guy B Williams
- Department of Clinical Neurosciences and Wolfson Brain Imaging Centre, University of Cambridge, Cambridge, UK
| | - Katie Wells
- Centre for Dementia Prevention, University of Edinburgh, Edinburgh, UK
| | - Brian Lawlor
- Institute of Neuroscience, Trinity College Dublin, University of Dublin, Dublin, Ireland
| | - Lorina Naci
- Institute of Neuroscience, Trinity College Dublin, University of Dublin, Dublin, Ireland
| | - Paresh Malhotra
- Division of Brain Science, Imperial College Healthcare NHS Trust, UK
| | - Clare Mackay
- Department of Psychiatry, University of Oxford, Oxford, UK
| | - Ivan Koychev
- Department of Psychiatry, University of Oxford, Oxford, UK
| | | | - Li Su
- Department of Psychiatry, School of Clinical Medicine, University of Cambridge, Cambridge, UK
- Department of Neuroscience, University of Sheffield, Sheffield, UK
| | - Craig W Ritchie
- Centre for Dementia Prevention, University of Edinburgh, Edinburgh, UK
| | - John T O’Brien
- Department of Psychiatry, School of Clinical Medicine, University of Cambridge, Cambridge, UK
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9
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Li H, Ghorbani S, Ling CC, Yong VW, Xue M. The extracellular matrix as modifier of neuroinflammation and recovery in ischemic stroke and intracerebral hemorrhage. Neurobiol Dis 2023; 186:106282. [PMID: 37683956 DOI: 10.1016/j.nbd.2023.106282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 09/01/2023] [Accepted: 09/05/2023] [Indexed: 09/10/2023] Open
Abstract
Stroke is the second leading cause of death worldwide and has two major subtypes: ischemic stroke and hemorrhagic stroke. Neuroinflammation is a pathological hallmark of ischemic stroke and intracerebral hemorrhage (ICH), contributing to the extent of brain injury but also in its repair. Neuroinflammation is intricately linked to the extracellular matrix (ECM), which is profoundly altered after brain injury and in aging. In the early stages after ischemic stroke and ICH, immune cells are involved in the deposition and remodeling of the ECM thereby affecting processes such as blood-brain barrier and cellular integrity. ECM components regulate leukocyte infiltration into the central nervous system, activate a variety of immune cells, and induce the elevation of matrix metalloproteinases (MMPs) after stroke. In turn, excessive MMPs may degrade ECM into components that are pro-inflammatory and injurious. Conversely, in the later stages after stroke, several ECM molecules may contribute to tissue recovery. For example, thrombospondin-1 and biglycan may promote activity of regulatory T cells, inhibit the synthesis of proinflammatory cytokines, and aid regenerative processes. We highlight these roles of the ECM in ischemic stroke and ICH and discuss their potential cellular and molecular mechanisms. Finally, we discuss therapeutics that could be considered to normalize the ECM in stroke. Our goal is to spur research on the ECM in order to improve the prognosis of ischemic stroke and ICH.
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Affiliation(s)
- Hongmin Li
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China; Academy of Medical Science, Zhengzhou University, Zhengzhou, Henan, China; Hotchkiss Brain Institute and Department of Clinical Neurosciences, University of Calgary, Alberta, Canada
| | - Samira Ghorbani
- Hotchkiss Brain Institute and Department of Clinical Neurosciences, University of Calgary, Alberta, Canada
| | - Chang-Chun Ling
- Department of Chemistry, University of Calgary, Alberta, Canada
| | - V Wee Yong
- Hotchkiss Brain Institute and Department of Clinical Neurosciences, University of Calgary, Alberta, Canada.
| | - Mengzhou Xue
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
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10
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Rebchuk AD, Hill MD, Goyal M, Demchuk A, Coutts SB, Asdaghi N, Dowlatshahi D, Holodinsky JK, Fainardi E, Shankar J, Najm M, Rubiera M, Khaw AV, Qiu W, Menon BK, Field TS. Exploring sex differences for acute ischemic stroke clinical, imaging and thrombus characteristics in the INTERRSeCT study. J Cereb Blood Flow Metab 2023; 43:1803-1809. [PMID: 37459107 PMCID: PMC10581233 DOI: 10.1177/0271678x231189908] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 06/21/2023] [Accepted: 06/24/2023] [Indexed: 10/17/2023]
Abstract
Women, especially following menopause, are known to have worse outcomes following acute ischemic stroke. One primary postulated biological mechanism for worse outcomes in older women is a reduction in the vasculoprotective effects of estrogen. Using the INTERRseCT cohort, a multicentre international observational cohort studying recanalization in acute ischemic stroke, we explored the effects of sex, and modifying effects of age, on neuroradiological predictors of recanalization including robustness of leptomeningeal collaterals, thrombus burden and thrombus permeability. Ordinal regression analyses were used to examine the relationship between sex and each of the neuroradiological markers. Further, we explored both multiplicative and additive interactions between age and sex. All patients (n = 575) from INTERRseCT were included. Mean age was 70.2 years (SD: 13.1) and 48.5% were women. In the unadjusted model, female sex was associated with better collaterals (OR 1.37, 95% CIs: 1.01-1.85), however this relationship was not significant after adjusting for age and relevant comorbidities. There were no significant interactions between age and sex. In a large prospective international cohort, we found no association between sex and radiological predictors of recanalization including leptomeningeal collaterals, thrombus permeability and thrombus burden.
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Affiliation(s)
- Alexander D Rebchuk
- Division of Neurosurgery, University of British Columbia, Vancouver, BC, Canada
| | - Michael D Hill
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Calgary Stroke Program, University of Calgary, Calgary, AB, Canada
| | - Mayank Goyal
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Calgary Stroke Program, University of Calgary, Calgary, AB, Canada
- Department of Radiology, University of Calgary, Calgary, AB, Canada
| | - Andrew Demchuk
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Calgary Stroke Program, University of Calgary, Calgary, AB, Canada
| | - Shelagh B Coutts
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Calgary Stroke Program, University of Calgary, Calgary, AB, Canada
| | - Negar Asdaghi
- Department of Neurology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Dar Dowlatshahi
- School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
- Department of Medicine (Neurology), University of Ottawa, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Jessalyn K Holodinsky
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Enrico Fainardi
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
| | - Jai Shankar
- Department of Radiology, University of Manitoba, Winnipeg, MB, Canada
| | - Mohamed Najm
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Marta Rubiera
- Neurology Department, Hospital Vall d’Hebron, Barcelona, Spain
| | - Alexander V Khaw
- Department of Clinical Neurosciences, University of Western Ontario, London, ON, Canada
| | - Wu Qiu
- Department of Radiology, University of Calgary, Calgary, AB, Canada
| | - Bijoy K Menon
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Calgary Stroke Program, University of Calgary, Calgary, AB, Canada
- Department of Radiology, University of Calgary, Calgary, AB, Canada
| | - Thalia S Field
- Division of Neurology, University of British Columbia, Vancouver, BC, Canada
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Vancouver Stroke Program, Vancouver, BC, Canada
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11
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Li Y, Li J, Yu Q, Ji L, Peng B. METTL14 regulates microglia/macrophage polarization and NLRP3 inflammasome activation after ischemic stroke by the KAT3B-STING axis. Neurobiol Dis 2023; 185:106253. [PMID: 37541353 DOI: 10.1016/j.nbd.2023.106253] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 07/29/2023] [Accepted: 08/01/2023] [Indexed: 08/06/2023] Open
Abstract
N6-methyladenosine (m6A) plays a crucial role in ischemic stroke, whereas the role of methyltransferase-like 14 (METTL14) in ischemic stroke remains unknown. A model of middle cerebral artery occlusion (MCAO) in rats and oxygen-glucose deprivation/reperfusion (OGD/R) model in HAPI cells were used to simulate ischemic stroke in vivo and in vitro. We found that METTL14 level was upregulated in microglia/macrophage after MCAO and OGD/R. METTL14 enhanced the expression of KAT3B by promoting the m6A modification of KAT3B mRNA. STING has been identified as a target for KAT3B and KAT3B increased STING expression by enhancing H3K27ac in the STING promoter. METTL14 promoted M1 polarization and NLRP3 inflammasome/pyroptosis axis by the KAT3B-STING signaling after OGD/R. METTL14 depletion relieved brain injury by inhibiting M1-like microglia/macrophage polarization and NLRP3 inflammasome/pyroptosis axis in MCAO rats. These findings indicate that METTL14 depletion relieves MCAO-induced brain injury, probably via switching microglia/macrophage from M1 towards M2 and restraining NLRP3 inflammasome/pyroptosis axis in microglia/macrophage.
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Affiliation(s)
- Yamei Li
- Department of Rehabilitation Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China
| | - Jiacen Li
- Department of Anesthesiology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Sichuan, China
| | - Qian Yu
- Department of Rehabilitation Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China
| | - Ling Ji
- Department of Rehabilitation Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China.
| | - Bo Peng
- Department of Rehabilitation Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China.
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12
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Damestani NL, Jacoby J, Yadav SM, Lovely AE, Michael A, Terpstra M, Eshghi M, Rashid B, Cruchaga C, Salat DH, Juttukonda MR. Associations between age, sex, APOE genotype, and regional vascular physiology in typically aging adults. Neuroimage 2023; 275:120167. [PMID: 37187365 PMCID: PMC10339339 DOI: 10.1016/j.neuroimage.2023.120167] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 05/02/2023] [Accepted: 05/11/2023] [Indexed: 05/17/2023] Open
Abstract
Altered blood flow in the human brain is characteristic of typical aging. However, numerous factors contribute to inter-individual variation in patterns of blood flow throughout the lifespan. To better understand the mechanisms behind such variation, we studied how sex and APOE genotype, a primary genetic risk factor for Alzheimer's disease (AD), influence associations between age and brain perfusion measures. We conducted a cross-sectional study of 562 participants from the Human Connectome Project - Aging (36 to >90 years of age). We found widespread associations between age and vascular parameters, where increasing age was associated with regional decreases in cerebral blood flow (CBF) and increases in arterial transit time (ATT). When grouped by sex and APOE genotype, interactions between group and age demonstrated that females had relatively greater CBF and lower ATT compared to males. Females carrying the APOEε4 allele showed the strongest association between CBF decline and ATT incline with age. This demonstrates that sex and genetic risk for AD modulate age-associated patterns of cerebral perfusion measures.
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Affiliation(s)
- Nikou L Damestani
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA; Department of Radiology, Harvard Medical School, Boston, MA, USA.
| | - John Jacoby
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA
| | - Shrikanth M Yadav
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA
| | - Allison E Lovely
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA
| | - Aurea Michael
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA
| | - Melissa Terpstra
- Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota, Minneapolis, MN, USA
| | | | - Barnaly Rashid
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA; Department of Neurology, Harvard Medical School, Boston, MA, USA
| | - Carlos Cruchaga
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA; NeuroGenomics and Informatics Center, Washington University School of Medicine, St. Louis, MO, USA; Hope Center for Neurologic Diseases, Washington University in St. Louis, St. Louis, MO, USA
| | - David H Salat
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA; Department of Radiology, Harvard Medical School, Boston, MA, USA; Neuroimaging Research for Veterans Center, VA Boston Healthcare System, Boston MA, USA
| | - Meher R Juttukonda
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA; Department of Radiology, Harvard Medical School, Boston, MA, USA.
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13
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Lu D, Wang Y, Liu G, Wang S, Duan A, Wang Z, Wang J, Sun X, Wu Y, Wang Z. Armcx1 attenuates secondary brain injury in an experimental traumatic brain injury model in male mice by alleviating mitochondrial dysfunction and neuronal cell death. Neurobiol Dis 2023:106228. [PMID: 37454781 DOI: 10.1016/j.nbd.2023.106228] [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: 04/14/2023] [Revised: 05/20/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023] Open
Abstract
Armcx1 is highly expressed in the brain and is located in the mitochondrial outer membrane of neurons, where it mediates mitochondrial transport. Mitochondrial transport promotes the removal of damaged mitochondria and the replenishment of healthy mitochondria, which is essential for neuronal survival after traumatic brain injury (TBI). This study investigated the role of Armcx1 and its potential regulator(s) in secondary brain injury (SBI) after TBI. An in vivo TBI model was established in male C57BL/6 mice via controlled cortical impact (CCI). Adeno-associated viruses (AAVs) with Armcx1 overexpression and knockdown were constructed and administered to mice via stereotactic cortical injection. Exogenous miR-223-3p mimic or inhibitor was transfected into cultured cortical neurons, which were then scratched to simulate TBI in vitro. It was found that Armcx1 expression decreased significantly, while miR-223-3p levels increased markedly in peri-lesion tissues after TBI. The overexpression of Armcx1 significantly reduced TBI-induced neurological dysfunction, neuronal cell death, mitochondrial dysfunction, and axonal injury, while the knockdown of Armcx1 had the opposite effect. Armcx1 was potentially a direct target of miR-223-3p. The miR-223-3p mimic obviously reduced the Armcx1 protein level, while the miR-223-3p inhibitor had the opposite effect. Finally, the miR-223-3p inhibitor dramatically improved mitochondrial membrane potential (MMP) and increased the total length of the neurites without affecting branching numbers. In summary, our results suggest that the decreased expression of Armcx1 protein in neurons after experimental TBI aggravates secondary brain injury, which may be regulated by miR-223-3p. Therefore, this study provides a potential therapeutic approach for treating TBI.
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Affiliation(s)
- Dengfeng Lu
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Yi Wang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Guangjie Liu
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Shixin Wang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Aojie Duan
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Zongqi Wang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Jing Wang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Xiaoou Sun
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China.
| | - Yu Wu
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China.
| | - Zhong Wang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
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14
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Wang H, Zhang F, Xu TW, Xu Y, Tian Y, Wu Y, Xu J, Hu S, Xu G. DNMT1 involved in the analgesic effect of folic acid on gastric hypersensitivity through downregulating ASIC1 in adult offspring rats with prenatal maternal stress. CNS Neurosci Ther 2023; 29:1678-1689. [PMID: 36852448 PMCID: PMC10173708 DOI: 10.1111/cns.14131] [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: 08/26/2022] [Revised: 11/30/2022] [Accepted: 12/10/2022] [Indexed: 03/01/2023] Open
Abstract
AIMS Gastric hypersensitivity (GHS) is a characteristic pathogenesis of functional dyspepsia (FD). DNA methyltransferase 1 (DNMT1) and acid-sensing ion channel 1 (ASIC1) are associated with GHS induced by prenatal maternal stress (PMS). The aim of this study was to investigate the mechanism of DNMT1 mediating the analgesic effect of folic acid (FA) on PMS-induced GHS. METHODS GHS was quantified by electromyogram recordings. The expression of DNMT1, DNMT3a, DNMT3b, and ASIC1 were detected by western blot, RT-PCR, and double-immunofluorescence. Neuronal excitability and proton-elicited currents of dorsal root ganglion (DRG) neurons were determined by whole-cell patch clamp recordings. RESULTS The expression of DNMT1, but not DNMT3a or DNMT3b, was decreased in DRGs of PMS rats. FA alleviated PMS-induced GHS and hyperexcitability of DRG neurons. FA also increased DNMT1 and decreased ASIC1 expression and sensitivity. Intrathecal injection of DNMT1 inhibitor DC-517 attenuated the effect of FA on GHS alleviation and ASIC1 downregulation. Overexpression of DNMT1 with lentivirus not only rescued ASIC1 upregulation and hypersensitivity, but also alleviated GHS and hyperexcitability of DRG neurons induced by PMS. CONCLUSIONS These results indicate that increased DNMT1 contributes to the analgesic effect of FA on PMS-induced GHS by reducing ASIC1 expression and sensitivity.
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Affiliation(s)
- Hong‐Jun Wang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
- Jiangsu Key Laboratory of Anesthesiology & Jiangsu Key Laboratory of Anesthesia and Analgesia Application TechnologyXuzhou Medical UniversityXuzhouChina
| | - Fu‐Chao Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Timothy W. Xu
- Suzhou Academy of Xi'an Jiaotong UniversitySuzhouChina
| | - Yu‐Cheng Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Yuan‐Qing Tian
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Yan‐Yan Wu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Ji‐Tian Xu
- Department of Physiology and NeurobiologyCollege of Basic Medical Sciences, Zhengzhou UniversityZhengzhouChina
| | - Shufen Hu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Guang‐Yin Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
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15
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Jia P, Wang J, Ren X, He J, Wang S, Xing Y, Chen D, Zhang X, Zhou S, Liu X, Yu S, Li Z, Jiang C, Zang W, Chen X, Wang J. An enriched environment improves long-term functional outcomes in mice after intracerebral hemorrhage by mechanisms that involve the Nrf2/BDNF/glutaminase pathway. J Cereb Blood Flow Metab 2023; 43:694-711. [PMID: 36635875 PMCID: PMC10108193 DOI: 10.1177/0271678x221135419] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 09/22/2022] [Accepted: 09/23/2022] [Indexed: 01/14/2023]
Abstract
Post-stroke depression exacerbates neurologic deficits and quality of life. Depression after ischemic stroke is known to some extent. However, depression after intracerebral hemorrhage (ICH) is relatively unknown. Increasing evidence shows that exposure to an enriched environment (EE) after cerebral ischemia/reperfusion injury has neuroprotective effects in animal models, but its impact after ICH is unknown. In this study, we investigated the effect of EE on long-term functional outcomes in mice subjected to collagenase-induced striatal ICH. Mice were subjected to ICH with the standard environment (SE) or ICH with EE for 6 h/day (8:00 am-2:00 pm). Depressive, anxiety-like behaviors and cognitive tests were evaluated on day 28 with the sucrose preference test, tail suspension test, forced swim test, light-dark transition experiment, morris water maze, and novel object recognition test. Exposure to EE improved neurologic function, attenuated depressive and anxiety-like behaviors, and promoted spatial learning and memory. These changes were associated with increased expression of transcription factor Nrf2 and brain-derived neurotrophic factor (BDNF) and inhibited glutaminase activity in the perihematomal tissue. However, EE did not change the above behavioral outcomes in Nrf2-/- mice on day 28. Furthermore, exposure to EE did not increase BDNF expression compared to exposure to SE in Nrf2-/- mice on day 28 after ICH. These findings indicate that EE improves long-term outcomes in sensorimotor, emotional, and cognitive behavior after ICH and that the underlying mechanism involves the Nrf2/BDNF/glutaminase pathway.
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Affiliation(s)
- Peijun Jia
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
- School of Life Sciences,
Zhengzhou University, Zhengzhou, China
| | - Junmin Wang
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
| | - Xiuhua Ren
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
| | - Jinxin He
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
| | - Shaoshuai Wang
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
| | - Yinpei Xing
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
| | - Danyang Chen
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
| | - Xinling Zhang
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
| | - Siqi Zhou
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
| | - Xi Liu
- Department of Neurology,
The First Affiliated Hospital of Zhengzhou University, Zhengzhou,
China
| | - Shangchen Yu
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
| | - Zefu Li
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
| | - Chao Jiang
- Department of Neurology,
The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou,
China
| | - Weidong Zang
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
| | - Xuemei Chen
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
| | - Jian Wang
- Department of Anatomy,
School of Basic Medical Sciences, , Zhengzhou
University, Zhengzhou, China
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16
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Wen H, Zuo Y, Li L, Zhan L, Xue J, Sun W, Xu E. Hypoxic postconditioning restores mitophagy against transient global cerebral ischemia via Parkin-induced posttranslational modification of TBK1. Neurobiol Dis 2023; 179:106043. [PMID: 36805078 DOI: 10.1016/j.nbd.2023.106043] [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: 10/05/2022] [Revised: 01/31/2023] [Accepted: 02/12/2023] [Indexed: 02/17/2023] Open
Abstract
Hypoxic postconditioning (HPC) has been reported to enhance Parkin-catalyzed mitochondrial ubiquitination to restore mitophagy in hippocampal CA1 against transient global cerebral ischemia (tGCI). However, the molecular mechanism leading ubiquitinated mitochondria to final clearance during HPC-mediated mitophagy after tGCI is unclear. This study aims to investigate whether HPC restores mitophagy after tGCI through Parkin-induced K63-linked poly-ubiquitination (K63-Ub) to activate tumor necrosis factor associated factor family member associated nuclear factor κB activator -binding kinase 1 (TBK1) in CA1 of male rats. We found that HPC maintained TBK1 expression, promoted p62 and TBK1 phosphorylation in mitochondria, and enhanced their recruitments to mitochondria in CA1 after tGCI. However, these effects were partially abolished by TBK1 inhibitor BX795. K63-Ub of mitochondrial TBK1 was disturbed at 26 h of reperfusion after tGCI, which was reversed by HPC. The maintenance of K63-Ub of mitochondrial TBK1 induced by HPC was counteracted under Parkin knockdown with AAV-mediated Prkn small-interfering RNA, accompanied by the suppression on TBK1 activation and the reduction of mitochondrial p62 phosphorylation. This innovative study indicated that HPC maintained K63-Ub of TBK1 in a Parkin-dependent manner to promote TBK1 phosphorylation, and then phosphorylated TBK1 activated p62 to restore mitophagy, thereby alleviating neuronal damage in CA1 after tGCI.
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Affiliation(s)
- Haixia Wen
- Institute of Neuroscience and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou 510260, PR China; Department of Neurology, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, China
| | - Yunyan Zuo
- Institute of Neuroscience and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou 510260, PR China
| | - Luxi Li
- Institute of Neuroscience and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou 510260, PR China; Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, China
| | - Lixuan Zhan
- Institute of Neuroscience and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou 510260, PR China
| | - Jiahui Xue
- Institute of Neuroscience and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou 510260, PR China
| | - Weiwen Sun
- Institute of Neuroscience and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou 510260, PR China
| | - En Xu
- Institute of Neuroscience and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou 510260, PR China.
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17
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Li D, Lu X, Xu G, Liu S, Gong Z, Lu F, Xia X, Jiang J, Wang H, Zou F, Ma X. Dihydroorotate dehydrogenase regulates ferroptosis in neurons after spinal cord injury via the P53-ALOX15 signaling pathway. CNS Neurosci Ther 2023. [PMID: 36942513 DOI: 10.1111/cns.14150] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 02/20/2023] [Accepted: 02/20/2023] [Indexed: 03/23/2023] Open
Abstract
BACKGROUND Spinal cord injury (SCI) is a highly disabling condition in spinal surgery that leads to neuronal damage and secondary inflammation. Ferroptosis is a non-apoptotic type of cell death that has only recently been identified, which is marked primarily by iron-dependent and lipid-derived reactive oxygen species accumulation, and accompanied by morphological modifications such as mitochondrial atrophy and increase in membrane density. Dihydroorotate dehydrogenase (DHODH) is a powerful inhibitor of ferroptosis and has been demonstrated to inhibit cellular ferroptosis in tumor cells, but whether it can inhibit neuronal injury following spinal cord injury remains ambiguous. METHODS In this study, the effect of DHODH on neuronal ferroptosis was observed in vivo and in vitro using a rat spinal cord injury model and erastin-induced PC12 cells, respectively. A combination of molecular and histological approaches was performed to assess ferroptosis and explore the possible mechanisms in vivo and in vitro. RESULTS First, we confirmed the existence of neuronal ferroptosis after spinal cord injury and that DHODH attenuates neuronal damage after spinal cord injury. Second, we showed molecular evidence that DHODH inhibits the activation of ferroptosis-related molecules and reduces lipid peroxide production and mitochondrial damage, thereby reducing neuronal ferroptosis. Further analysis suggests that P53/ALOX15 may be one of the mechanisms regulated by DHODH. Importantly, we determined that DHODH inhibits ALOX15 expression by inhibiting P53. CONCLUSIONS Our findings reveal a novel function for DHODH in neuronal ferroptosis after spinal cord injury, suggesting a unique therapeutic target to alleviate the disease process of spinal cord injury.
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Affiliation(s)
- Dachuan Li
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiao Lu
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
| | - Guangyu Xu
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
| | - Siyang Liu
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
| | - Zhaoyang Gong
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
| | - Feizhou Lu
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
| | - Xinlei Xia
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
| | - Jianyuan Jiang
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
| | - Hongli Wang
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
| | - Fei Zou
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiaosheng Ma
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
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Xu F, Cong P, Zhang B, Dong H, Zuo W, Wu T, Tian L, Xiong L. A decrease in NR2B expression mediated by DNA hypermethylation induces perioperative neurocognitive disorder in aged mice. CNS Neurosci Ther 2023; 29:1229-1242. [PMID: 36694341 PMCID: PMC10068472 DOI: 10.1111/cns.14097] [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: 09/22/2022] [Revised: 01/08/2023] [Accepted: 01/09/2023] [Indexed: 01/26/2023] Open
Abstract
AIMS This study was designed to investigate the role of NR2B and the contribution of DNA methylation to NR2B expression in the pathogenesis of PND. METHODS Eighteen-month-old C57BL/6J mice were subjected to experimental laparotomy under 1.4% isoflurane anesthesia. Hippocampus-dependent learning and memory were evaluated by using the Barnes maze and contextual fear conditioning tests. The protein and mRNA expression levels of NR2B were evaluated by western blotting and qRT-PCR respectively, and the methylation of the NR2B gene was examined by using targeted bisulfite sequencing. Long-term synaptic plasticity (LTP) was measured by electrophysiology. RESULTS Mice that underwent laparotomy exhibited hippocampus-dependent cognitive deficits accompanied by decreased NR2B expressions and LTP deficiency. The overexpression of NR2B in the dorsal hippocampus could improve learning and memory in mice subjected to laparotomy. In particular, the decreased NR2B expressions induced by laparotomy was attributed to the NR2B gene hypermethylation. Preoperative administration of S-adenosylmethionine (SAM) could hypomethylate the NR2B gene, upregulate NR2B expression and improve LTP, exerting a dose-dependent therapeutic effect against PND. Moreover, inhibiting NR2B abrogated the benefits of SAM pretreatment. CONCLUSIONS Laparotomy cause hippocampus-dependent cognitive decline by hypermethylating the NR2B gene, allowing us to understand the pathogenesis of PND in an epigenetic landscape.
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Affiliation(s)
- Feifei Xu
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Peilin Cong
- Department of Anesthesiology and Perioperative Medicine, Shanghai Fourth People's Hospital Affiliated to Tongji University School of Medicine, Translational Research Institute of Brain and Brain-Like Intelligence Affiliated to Tongji University School of Medicine, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, China
| | - Bingqian Zhang
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hailong Dong
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Wenqiang Zuo
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Tingmei Wu
- Department of Anesthesiology and Perioperative Medicine, Shanghai Fourth People's Hospital Affiliated to Tongji University School of Medicine, Translational Research Institute of Brain and Brain-Like Intelligence Affiliated to Tongji University School of Medicine, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, China
| | - Li Tian
- Department of Anesthesiology and Perioperative Medicine, Shanghai Fourth People's Hospital Affiliated to Tongji University School of Medicine, Translational Research Institute of Brain and Brain-Like Intelligence Affiliated to Tongji University School of Medicine, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, China
| | - Lize Xiong
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, China.,Department of Anesthesiology and Perioperative Medicine, Shanghai Fourth People's Hospital Affiliated to Tongji University School of Medicine, Translational Research Institute of Brain and Brain-Like Intelligence Affiliated to Tongji University School of Medicine, Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Shanghai, China
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Edmunds KJ, Driscoll I, Hagen EW, Barnet JH, Ravelo LA, Plante DT, Gaitán JM, Lose SR, Motovylyak A, Bendlin BB, Okonkwo OC, Peppard PE. Cardiorespiratory Fitness Attenuates the Deleterious Effects of Sleep Apnea on Cerebral Structure and Perfusion in the Wisconsin Sleep Cohort Study. J Alzheimers Dis 2023; 95:427-435. [PMID: 37545229 PMCID: PMC10810251 DOI: 10.3233/jad-220910] [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] [Indexed: 08/08/2023]
Abstract
BACKGROUND Emerging evidence suggests that age-related changes in cerebral health may be sensitive to vascular risk modifiers, such as physical activity and sleep. OBJECTIVE We examine whether cardiorespiratory fitness modifies the association of obstructive sleep apnea (OSA) severity with MRI-assessed measures of cerebral structure and perfusion. METHODS Using data from a cross-sectional sample of participants (n = 129, 51% female, age range 49.6-85.3 years) in the Wisconsin Sleep Cohort study, we estimated linear models of MRI-assessed total and regional gray matter (GM) and white matter (WM) volumes, WM hyperintensity (WMH:ICV ratio), total lesion volume, and arterial spin labeling (ASL) cerebral blood flow (CBF), using an estimated measure of cardiorespiratory fitness (CRF) and OSA severity as predictors. Participants' sleep was assessed using overnight in-laboratory polysomnography, and OSA severity was measured using the apnea-hypopnea index (AHI), or the mean number of recorded apnea and hypopnea events per hour of sleep. The mean±SD time difference between PSG data collection and MRI data collection was 1.7±1.5 years (range: [0, 4.9 years]). RESULTS OSA severity was associated with reduced total GM volume (β=-0.064; SE = 0.023; p = 0.007), greater total WM lesion volume (interaction p = 0.023), and greater WMHs (interaction p = 0.017) in less-fit subjects. Perfusion models revealed significant differences in the association of AHI and regional CBF between fitness groups (interaction ps < 0.05). CONCLUSION This work provides new evidence for the protective role of cardiorespiratory fitness against the deleterious effects of OSA on brain aging in late-middle age to older adults.
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Affiliation(s)
- Kyle J Edmunds
- Wisconsin Alzheimer’s Disease Research Center, School of Medicine and Public Health, University of Wisconsin-Madison
| | - Ira Driscoll
- Wisconsin Alzheimer’s Disease Research Center, School of Medicine and Public Health, University of Wisconsin-Madison
- Psychology Department, University of Wisconsin-Milwaukee
| | - Erika W Hagen
- Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin-Madison
| | - Jodi H Barnet
- Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin-Madison
| | - Laurel A Ravelo
- Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin-Madison
| | - David T Plante
- Department of Psychiatry, School of Medicine and Public Health, University of Wisconsin-Madison
| | - Julian M Gaitán
- Wisconsin Alzheimer’s Disease Research Center, School of Medicine and Public Health, University of Wisconsin-Madison
| | - Sarah R Lose
- Wisconsin Alzheimer’s Disease Research Center, School of Medicine and Public Health, University of Wisconsin-Madison
| | - Alice Motovylyak
- Wisconsin Alzheimer’s Disease Research Center, School of Medicine and Public Health, University of Wisconsin-Madison
| | - Barbara B Bendlin
- Wisconsin Alzheimer’s Institute, School of Medicine and Public Health, University of Wisconsin-Madison
| | - Ozioma C Okonkwo
- Wisconsin Alzheimer’s Disease Research Center, School of Medicine and Public Health, University of Wisconsin-Madison
| | - Paul E Peppard
- Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin-Madison
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20
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Wang Y, Li Y, Wang G, Lu J, Li Z. Overexpression of Homer1b/c induces valproic acid resistance in epilepsy. CNS Neurosci Ther 2023; 29:331-343. [PMID: 36353757 PMCID: PMC9804053 DOI: 10.1111/cns.14008] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 06/23/2022] [Accepted: 09/21/2022] [Indexed: 11/11/2022] Open
Abstract
AIMS Resistance to valproic acid (VPA) is a major challenge for epilepsy treatment. We aimed to explore the mechanism underlying this resistance. METHODS Pentylenetetrazol-induced chronic epileptic rats were administered VPA (250 mg/Kg) for 14 days; rats with controlled seizure stages (seizure score14th-before ≤0) and latent time (latent time14th-before ≥0) were considered VPA-responsive, while the others were considered nonresponsive. Differentially expressed genes (DEGs) between the VPA-responsive and nonresponsive rat hippocampus transcriptomes were identified, and their functions were evaluated. The roles of postsynaptic density (PSD) and Homer1 were also determined. Furthermore, a subtype of Homer1 (Homer1b/c) was overexpressed or silenced in HT22 cells to determine its effect on VPA efficacy. Moreover, the membrane levels of mGluR1/5 directly bound to Homer1b/c were assessed. RESULTS Overall, 264 DEGs commonly enriched in the PSD between VPA-responsive and nonresponsive rats. Among them, Homer1 was more highly expressed in the hippocampus of nonresponses compared to that of responses. Overexpression of Homer1b/c interrupted VPA efficacy by increasing reactive oxygen species production, lactate dehydrogenase release, and calcium content. Furthermore, it induced the overexpression of mGluR1 and mGluR5. CONCLUSION Overexpression of Homer1b/c influenced VPA efficacy, revealing it could be a target to improve the efficacy of this treatment.
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Affiliation(s)
- Yan Wang
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality MedicineSchool of Pharmacy, Hainan Medical UniversityHaikouChina
| | - Youbin Li
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality MedicineSchool of Pharmacy, Hainan Medical UniversityHaikouChina
| | - Guangfei Wang
- Department of PharmacyChildren's Hospital of Fudan UniversityShanghaiChina
| | - Jinmiao Lu
- Department of PharmacyChildren's Hospital of Fudan UniversityShanghaiChina
| | - Zhiping Li
- Department of PharmacyChildren's Hospital of Fudan UniversityShanghaiChina
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Zhao S, Wang S, Cao L, Zeng H, Lin S, Lin Z, Chen M, Zhu M, Pang Z, Zhang Y. Acupuncture promotes nerve repair through the benign regulation of mTOR-mediated neuronal autophagy in traumatic brain injury rats. CNS Neurosci Ther 2022; 29:458-470. [PMID: 36422883 PMCID: PMC9804054 DOI: 10.1111/cns.14018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 08/19/2022] [Accepted: 08/22/2022] [Indexed: 11/25/2022] Open
Abstract
AIMS Recent investigations have already proved the neuroprotective efficacy of acupuncture in clinical practice in the treatment of neurological diseases, such as traumatic brain injury (TBI). Since growing evidence has suggested that neuronal autophagy was involved in multiple stages of TBI, this study aims to clarify the autophagy mediating mechanism underlying the neuroprotective effect of acupuncture in TBI rats. METHODS Three experiments were carried out to detect changes in neuronal autophagy and identify the potential molecular mechanism underlying the neuroprotective effect of acupuncture for TBI treatment. Feeney's free-falling epidural impingement method was used to establish the moderate TBI rat model; modified neurological severity scoring (mNSS) was used for neurological recovery evaluation. Nissl and HE staining were used to examine the histopathological changes. Immunofluorescence was used to detect the LC3-positive cell rate. The transmission electron microscope (TEM) was used to investigate the morphology and quantity of autophagosomes. Western blotting was used to determine the protein expressions of LC3, p62, beclin1, mTOR, ULK1, p-mTOR, and p-ULK1. Quantitative real-time polymerase chain reaction (qRT-PCR) was used for gene expressions analysis of LC3 mRNA and p62 mRNA. Co-immunoprecipitation (CO-IP) method was used to identify the protein interaction of mTOR and ULK1. RESULTS On Day 3 after TBI, acupuncture accelerated the removal of damaged cellular structures by promoting neuronal autophagy; on Day 7 and Day 14 after TBI, acupuncture inhibited neuronal autophagy, preventing excessive autophagy and thus alleviated nerve damage. In addition, the simultaneous treatment with 3-MA or rapamycin at different stages after TBI attenuated the effect of acupuncture. CONCLUSION Acupuncture has a benign regulatory effect on neuronal autophagy in different stages of TBI, possibly through the mTOR/ULK1 pathway.
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Affiliation(s)
- Sisi Zhao
- School of Traditional Chinese MedicineJinan UniversityGuangzhouChina
| | - Shiqi Wang
- School of Traditional Chinese MedicineJinan UniversityGuangzhouChina
| | - Luxi Cao
- School of Traditional Chinese MedicineJinan UniversityGuangzhouChina
| | - Hai Zeng
- School of Traditional Chinese MedicineJinan UniversityGuangzhouChina
| | - Shujun Lin
- Medical College of Acupuncture‐Moxibustion and RehabilitationGuangzhou University of Chinese MedicineGuangzhouChina
| | - Zhuowen Lin
- School of Traditional Chinese MedicineJinan UniversityGuangzhouChina
| | - Minan Chen
- School of Traditional Chinese MedicineJinan UniversityGuangzhouChina
| | - Mingmin Zhu
- School of Traditional Chinese MedicineJinan UniversityGuangzhouChina
| | - Zhao Pang
- Medical Administration DivisionThe First Affiliated Hospital of Jinan UniversityGuangzhouChina
| | - Yimin Zhang
- School of Traditional Chinese MedicineJinan UniversityGuangzhouChina
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22
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Li G, Guan Y, Gu Y, Guo M, Ma W, Shao Q, Liu J, Ji X. Intermittent hypoxic conditioning restores neurological dysfunction of mice induced by long-term hypoxia. CNS Neurosci Ther 2022; 29:202-215. [PMID: 36401601 PMCID: PMC9804074 DOI: 10.1111/cns.13996] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 09/18/2022] [Accepted: 09/20/2022] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Central nervous system diseases are associated with hypoxia, which usually cause irreversible nerve damage, but the underlying mechanism is unclear and effective intervention strategies are lacking. This study was designed to explore the mechanism and treatment strategy of hypoxia-induced nerve injury. METHODS In this study, 13% O2 was used to treat mice for 0, 1, 3 7, and 14 days, Morris water maze and other animal behavior experiments were used to evaluate the neurological function of mice. TUNEL, BrdU, PCNA, DCX, and SOX2 staining were used to observe the apoptosis and proliferation of mouse neurons. RT-PCR and Iba1 staining were used to evaluate the release of inflammatory factors IL-1β, IL-6, and TNF-α and the activation of microglia. RESULTS Short-term hypoxia promotes neurogenesis, while long-term hypoxia inhibits neurogenesis. The changes in hypoxia-induced neurogenesis were positively correlated with neurological functions, but negatively correlated with apoptosis. Moreover, intermittent hypoxic conditioning restored long-term hypoxia-induced neurological dysfunction by promoting neural stem cell generation and inhibiting the release of inflammatory factors IL-1β, IL-6, and TNF-α and the activation of microglia. CONCLUSION Hypoxia promoted neurogenesis in a time-dependent manner, and intermittent hypoxic conditioning exerted a neuroprotective effect through promoting neural stem cell generation and suppressing inflammation induced by long-term hypoxia stress, which provided a novel concept to develop a treatment for hypoxia-related brain injury.
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Affiliation(s)
- Gaifen Li
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Advanced Innovation Center for Big Data‐based Precision MedicineCapital Medical UniversityBeijingChina,Department of Neurosurgery, Xuanwu HospitalCapital Medical UniversityBeijingChina
| | - Yuying Guan
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Advanced Innovation Center for Big Data‐based Precision MedicineCapital Medical UniversityBeijingChina,Department of Neurosurgery, Xuanwu HospitalCapital Medical UniversityBeijingChina
| | - Yakun Gu
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Advanced Innovation Center for Big Data‐based Precision MedicineCapital Medical UniversityBeijingChina
| | - Mengyuan Guo
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Advanced Innovation Center for Big Data‐based Precision MedicineCapital Medical UniversityBeijingChina
| | - Wei Ma
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Advanced Innovation Center for Big Data‐based Precision MedicineCapital Medical UniversityBeijingChina
| | - Qianqian Shao
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Advanced Innovation Center for Big Data‐based Precision MedicineCapital Medical UniversityBeijingChina
| | - Jia Liu
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Advanced Innovation Center for Big Data‐based Precision MedicineCapital Medical UniversityBeijingChina
| | - Xunming Ji
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Advanced Innovation Center for Big Data‐based Precision MedicineCapital Medical UniversityBeijingChina,Department of Neurosurgery, Xuanwu HospitalCapital Medical UniversityBeijingChina
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23
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Ge C, Chen W, Zhang L, Ai Y, Zou Y, Peng Q. Hippocampus-prefrontal cortex inputs modulate spatial learning and memory in a mouse model of sepsis induced by cecal ligation puncture. CNS Neurosci Ther 2022; 29:390-401. [PMID: 36377471 PMCID: PMC9804045 DOI: 10.1111/cns.14013] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 10/09/2022] [Accepted: 10/19/2022] [Indexed: 11/16/2022] Open
Abstract
AIMS Sepsis-associated encephalopathy (SAE) often leads to cognitive impairments. However, the pathophysiology of SAE is complex and unclear. Here, we investigated the role of hippocampus (HPC)-prefrontal cortex (PFC) in cognitive dysfunction in sepsis induced by cecal ligation puncture (CLP) in mice. METHODS The neural projections from the HPC to PFC were first identified via retrograde tracing and viral expression. Chemogenetic activation of the HPC-PFC pathway was shown via immunofluorescent staining of c-Fos-positive neurons in PFC. Morris Water Maze (MWM) and Barnes maze (BM) were used to evaluate cognitive function. Western blotting analysis was used to determine the expression of glutamate receptors and related molecules in PFC and HPC. RESULTS Chemogenetic activation of the HPC-PFC pathway enhanced cognitive dysfunction in CLP-induced septic mice. Glutamate receptors mediated the effects of HPC-PFC pathway activation in CLP mice. The activation of the HPC-PFC pathway resulted in significantly increased levels of NMDAR, AMPAR, and downstream signaling molecules including CaMKIIa, pCREB, and BDNF in PFC. However, inhibition of glutamate receptors using 2,3-dihydroxy-6-nitro-7-sulphamoyl-benzo (F)quinoxaline (NBQX), which is an α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR inhibitor), or D-2-amino-5-phosphonopentanoate (D-AP5), which is an NMDA receptor antagonist abolished this increase. CONCLUSION Our study reveals the important role of the HPC-PFC pathway in improving cognitive dysfunction in a mouse model of CLP sepsis and provides a novel pathogenetic mechanism for SAE.
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Affiliation(s)
- Cheng‐Long Ge
- Department of Critical Care MedicineXiangya Hospital, Central South UniversityChangshaHunan ProvinceChina,National Clinical Research Center for Geriatric DisordersChangshaHunan ProvinceChina,Hunan Provincial Clinical Research Center for Critical Care MedicineChangshaHunan ProvinceChina
| | - Wei Chen
- Department of Critical Care MedicineXiangya Hospital, Central South UniversityChangshaHunan ProvinceChina,National Clinical Research Center for Geriatric DisordersChangshaHunan ProvinceChina,Hunan Provincial Clinical Research Center for Critical Care MedicineChangshaHunan ProvinceChina
| | - Li‐Na Zhang
- Department of Critical Care MedicineXiangya Hospital, Central South UniversityChangshaHunan ProvinceChina,National Clinical Research Center for Geriatric DisordersChangshaHunan ProvinceChina,Hunan Provincial Clinical Research Center for Critical Care MedicineChangshaHunan ProvinceChina
| | - Yu‐Hang Ai
- Department of Critical Care MedicineXiangya Hospital, Central South UniversityChangshaHunan ProvinceChina,National Clinical Research Center for Geriatric DisordersChangshaHunan ProvinceChina,Hunan Provincial Clinical Research Center for Critical Care MedicineChangshaHunan ProvinceChina
| | - Yu Zou
- Department of AnesthesiaXiangya Hospital, Central South UniversityChangshaHunan ProvinceChina
| | - Qian‐Yi Peng
- Department of Critical Care MedicineXiangya Hospital, Central South UniversityChangshaHunan ProvinceChina,National Clinical Research Center for Geriatric DisordersChangshaHunan ProvinceChina,Hunan Provincial Clinical Research Center for Critical Care MedicineChangshaHunan ProvinceChina
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Zhao A, Jin H, Fan G, Li Y, Li C, Li Q, Ma X, Zhao T, Sun S, Liu S, Gao Y, Qi S. Inhibition of the expression of rgs-3 alleviates propofol-induced decline in learning and memory in Caenorhabditis elegans. CNS Neurosci Ther 2022; 29:306-316. [PMID: 36284438 PMCID: PMC9804065 DOI: 10.1111/cns.14004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 09/28/2022] [Accepted: 09/30/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Exposure to anesthesia leads to extensive neurodegeneration and long-term cognitive deficits in the developing brain. Caenorhabditis elegans also shows persistent behavioral changes during development after exposure to anesthetics. Clinical and rodent studies have confirmed that altered expression of the regulators of G protein signaling (RGS) in the nervous system is a factor contributing to neurodegenerative and psychological diseases. Evidence from preclinical studies has suggested that RGS controls drug-induced plasticity, including morphine tolerance and addiction. This study aimed to observe the effect of propofol exposure in the neurodevelopmental stage on learning and memory in the L4 stage and to study whether this effect is related to changes in rgs-3 expression. METHODS Caenorhabditis elegans were exposed to propofol at the L1 stage, and learning and memory abilities were observed at the L4 stage. The expression of rgs-3 and the nuclear distribution of EGL-4 were determined to study the relevant mechanisms. Finally, RNA interference was performed on rgs-3-expressing cells after propofol exposure. Then, we observed their learning and memory abilities. RESULTS Propofol time- and dose-dependently impaired the learning capacity. Propofol induced a decline in non-associative and associative long-term memory, rgs-3 upregulation, and a failure of nuclear accumulation of EGL-4/PKG in AWC neurons. Inhibition of rgs-3 could alleviate the propofol-induced changes. CONCLUSION Inhibition of the expression of rgs-3 alleviated propofol-induced learning and memory deficits in Caenorhabditis elegans.
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Affiliation(s)
- Ayang Zhao
- Department of AnesthesiologyThe Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina
| | - Hongjiang Jin
- Department of AnesthesiologyThe Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina
| | - Guibo Fan
- Department of AnesthesiologyThe Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina
| | - Yan Li
- Department of AnesthesiologyThe Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina
| | - Chenglong Li
- Department of AnesthesiologyThe Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina
| | - Qi Li
- Department of AnesthesiologyThe Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina
| | - Xiaofei Ma
- Department of ICUThe Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina
| | - Tianyang Zhao
- Department of AnesthesiologyThe Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina
| | - Siqi Sun
- Department of AnesthesiologyThe Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina
| | - Shuai Liu
- Department of AnesthesiologyThe Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina
| | - Yueyue Gao
- Department of AnesthesiologyThe Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina
| | - Sihua Qi
- Department of AnesthesiologyThe Fourth Affiliated Hospital of Harbin Medical UniversityHarbinChina
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Zhang B, Dong W, Ma Z, Duan S, Han R, Lv Z, Liu X, Mao Y. Hyperbaric oxygen improves depression-like behaviors in chronic stress model mice by remodeling gut microbiota and regulating host metabolism. CNS Neurosci Ther 2022; 29:239-255. [PMID: 36261870 PMCID: PMC9804075 DOI: 10.1111/cns.13999] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 09/09/2022] [Accepted: 09/30/2022] [Indexed: 02/06/2023] Open
Abstract
AIMS There is growing evidence that the gut microbiota plays a significant part in the pathophysiology of chronic stress. The dysbiosis of the gut microbiota closely relates to dysregulation of microbiota-host cometabolism. Composition changes in the gut microbiota related to perturbations in metabolic profiles are vital risk factors for disease development. Hyperbaric oxygen therapy is commonly applied as an alternative or primary therapy for various diseases. Therefore, a metabolic and gut bacteria perspective is essential to uncover possible mechanisms of chronic stress and the therapeutic effect of hyperbaric oxygenation. We determined that there were significantly disturbed metabolites and disordered gut microbiota between control and chronic stress group. The study aims to offer further information on the interactions between host metabolism, gut microbiota, and chronic stress. METHODS At present, chronic unpredictable mild stress is considered the most widespread method of modeling chronic stress in animals, so we used a chronic unpredictable mild stress mouse model to characterize changes in the metabolome and microbiome of depressed mice by combining 16S rRNA gene sequencing and UHPLC-MS/MS-based metabolomics. Pearson's correlation-based clustering analysis was performed with above metabolomics and fecal microbiome data to determine gut microbiota-associated metabolites. RESULTS We found that 18 metabolites showed a significant correlation with campylobacterota. Campylobacterota associated metabolites were significantly enriched mainly in the d-glutamate and d-glutamine metabolism. Hyperoxia treatment may improve depression-like behaviors in chronic stress model mice through regulating the disrupted metabolites. CONCLUSIONS Hyperbaric oxygen improves depression-like behaviors in chronic stress model mice by remodeling Campylobacterota associated metabolites.
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Affiliation(s)
- Bohan Zhang
- Department of Anesthesiology and Surgical Intensive Care Unit, Xinhua HospitalShanghai Jiaotong University School of MedicineShanghaiChina
| | - Wenwen Dong
- Department of Anesthesiology and Surgical Intensive Care Unit, Xinhua HospitalShanghai Jiaotong University School of MedicineShanghaiChina
| | - Zhixin Ma
- Translational Medical InstituteShanghai UniversityShanghaiChina
| | - Shuxian Duan
- Department of Anesthesiology and Surgical Intensive Care Unit, Xinhua HospitalShanghai Jiaotong University School of MedicineShanghaiChina
| | - Ruina Han
- Translational Medical InstituteShanghai UniversityShanghaiChina
| | - Zhou Lv
- Department of Anesthesiology and Surgical Intensive Care Unit, Xinhua HospitalShanghai Jiaotong University School of MedicineShanghaiChina
| | - Xinru Liu
- Translational Medical InstituteShanghai UniversityShanghaiChina
| | - Yanfei Mao
- Department of Anesthesiology and Surgical Intensive Care Unit, Xinhua HospitalShanghai Jiaotong University School of MedicineShanghaiChina
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26
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Xiao L, Ji X, Zhao H, Luo Y, Hu S, Zhao T, Hu Z, Duan J. A novel severe cerebral venous thrombosis rat model based on semi-ligation combined with ferric chloride and thrombin. CNS Neurosci Ther 2022; 28:2129-2140. [PMID: 36000206 PMCID: PMC9627376 DOI: 10.1111/cns.13950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 07/25/2022] [Accepted: 08/05/2022] [Indexed: 02/06/2023] Open
Abstract
AIMS An applicable cerebral venous sinus thrombosis (CVST) model is imperative for exploring its pathophysiology. We established a novel severe CVST model using semi-ligation, ferric chloride, and thrombin. METHODS A total of 138 male Sprague-Dawley rats were randomly divided into semi-ligation (n = 75) and non-semi-ligation (n = 63) groups. A sham group (n = 46) was also included. We compared short-term and long-term neurological and cognitive dysfunction, mortality rates, thrombus load, venous infarction volume, the blood-brain barrier permeability, brain water content, and microglia activation among the three groups. RESULTS Thrombi involving multiple venous sinuses appeared in all semi-ligation rats within 2 days postoperatively. Compared with the non-semi-ligation group, short-term and long-term neurological dysfunction were more severe (p < 0.05), and thrombus weight, venous infarction volumes, and microglia activation were more significant (p < 0.05) in the semi-ligation group. Further, the cognitive function of the semi-ligation group significantly decreased (p < 0.05) on postoperative day 21. Cumulative mortality rates between the semi-ligation and non-semi-ligation groups did not differ significantly. CONCLUSION Semi-ligation combined with ferric chloride and thrombin can produce a severe CVST model with multiple venous sinus involvement, which is suitable for short- and long-term neurological and cognitive dysfunction assessment.
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Affiliation(s)
- Lipo Xiao
- Department of Emergency, Xuanwu HospitalCapital Medical UniversityBeijingChina,Department of Neurology and Intracranial Hypertension & Cerebral Venous Disease CenterNational Health Commission of the People's Republic of China, Xuanwu Hospital, Capital Medical UniversityBeijingChina,Department of NeurologyThe People's Hospital of QingxianCangzhouChina
| | - Xunming Ji
- Department of Neurology and Intracranial Hypertension & Cerebral Venous Disease CenterNational Health Commission of the People's Republic of China, Xuanwu Hospital, Capital Medical UniversityBeijingChina
| | - Haiping Zhao
- Cerebrovascular Diseases Research Institute and Department of NeurologyXuanwu Hospital, Capital Medical UniversityBeijingChina
| | - Yumin Luo
- Cerebrovascular Diseases Research Institute and Department of NeurologyXuanwu Hospital, Capital Medical UniversityBeijingChina
| | - Shuyuan Hu
- Department of Emergency, Xuanwu HospitalCapital Medical UniversityBeijingChina,Department of Neurology and Intracranial Hypertension & Cerebral Venous Disease CenterNational Health Commission of the People's Republic of China, Xuanwu Hospital, Capital Medical UniversityBeijingChina
| | - Tingyu Zhao
- Department of Emergency, Xuanwu HospitalCapital Medical UniversityBeijingChina,Department of Neurology and Intracranial Hypertension & Cerebral Venous Disease CenterNational Health Commission of the People's Republic of China, Xuanwu Hospital, Capital Medical UniversityBeijingChina
| | - Zeliang Hu
- Department of Pathology, Xuanwu HospitalCapital Medical UniversityBeijingChina
| | - Jiangang Duan
- Department of Emergency, Xuanwu HospitalCapital Medical UniversityBeijingChina,Department of Neurology and Intracranial Hypertension & Cerebral Venous Disease CenterNational Health Commission of the People's Republic of China, Xuanwu Hospital, Capital Medical UniversityBeijingChina
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27
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Wang YL, Sun M, Wang FZ, Wang X, Jia Z, Zhang Y, Li R, Jiang J, Wang L, Li W, Sun Y, Chen J, Zhang C, Shi B, Liu J, Liu X, Xu J. Mediation of the APOE Associations With Cognition Through Cerebral Blood Flow: The CIBL Study. Front Aging Neurosci 2022; 14:928925. [PMID: 35847686 PMCID: PMC9279129 DOI: 10.3389/fnagi.2022.928925] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 06/02/2022] [Indexed: 12/02/2022] Open
Abstract
Background The ε4 allele of the apolipoprotein E (APOE) gene is a strong genetic risk factor for aging-related cognitive decline. However, the causal connection between ε4 alleles and cognition is not well understood. The objective of this study was to identify the roles of cerebral blood flow (CBF) in cognitive-related brain areas in mediating the associations of APOE with cognition. Methods The multiple linear regression analyses were conducted on 369 subjects (mean age of 68.8 years; 62.9% of women; 29.3% of APOE ε4 allele carriers). Causal mediation analyses with 5,000 bootstrapped iterations were conducted to explore the mediation effects. Result APOE ε4 allele was negatively associated with cognition (P < 0.05) and CBF in the amygdala, hippocampus, middle temporal gyrus, posterior cingulate, and precuneus (all P < 0.05). The effect of the APOE genotype on cognition was partly mediated by the above CBF (all P < 0.05). Conclusion CBF partially mediates the potential links between APOE genotype and cognition. Overall, the APOE ε4 allele may lead to a dysregulation of the vascular structure and function with reduced cerebral perfusion, which in turn leads to cognitive impairment.
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Affiliation(s)
- Yan-Li Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Mengfan Sun
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Fang-Ze Wang
- Department of Cardiology, Weifang People’s Hospital, Weifang Medical University, Weifang, China
| | - Xiaohong Wang
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China
| | - Ziyan Jia
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yuan Zhang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Runzhi Li
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jiwei Jiang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Linlin Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Wenyi Li
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yongan Sun
- Department of Neurology, Peking University First Hospital, Peking University, Beijing, China
| | - Jinglong Chen
- Division of Neurology, Department of Geriatrics, National Clinical Key Specialty, Guangzhou First People’s Hospital, School of Medicine, South China University of Technology, Guangzhou, China
| | - Cuicui Zhang
- Department of Neurology, The Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Baolin Shi
- Department of Neurology, Weifang People’s Hospital, Weifang Medical University, Weifang, China
| | - Jianjian Liu
- Department of Neurology, Fuxing Hospital, Capital Medical University, Beijing, China
| | - Xiangrong Liu
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jun Xu
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- *Correspondence: Jun Xu,
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28
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Ma X, Zhao J, Li S, Wang Y, Liu J, Shi Y, Liu J, Chen Y, Chen Y, Pan Q. Rab27a-dependent exosomes protect against cerebral ischemic injury by reducing endothelial oxidative stress and apoptosis. CNS Neurosci Ther 2022; 28:1596-1612. [PMID: 35770324 PMCID: PMC9437240 DOI: 10.1111/cns.13902] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 06/12/2022] [Accepted: 06/14/2022] [Indexed: 12/03/2022] Open
Abstract
Introduction Multicellular crosstalk within the brain tissue has been suggested to play a critical role in maintaining cerebral vascular homeostasis. Exosomes (EXs) mediated cell–cell communication, but its role in cerebral ischemic injury is largely unknown. Rab27a is one of the major genes controlling EX release. Here, we explored the role of Rab27a in regulating brain EXs secretion, and the effects of Rab27a‐mediated EXs on ischemia evoked cerebral vascular disruption and brain injury. Methods Cerebral ischemia was induced in Rab27a knockout (Rab27a−/−) and wide type (WT) mice by transient middle cerebral artery occlusion (tMCAO). Differential gene expression analysis was performed in ischemic brain tissue by using mRNA sequencing. EXs isolated from brain tissue of Rab27a−/− and WT mice (EXWT or EXRab27a−/−) were pre‐administrated into tMCAO operated Rab27a−/− mice or oxygen and glucose deprivation (OGD) treated primary brain vascular endothelial cells (ECs). Results We demonstrated that Rab27a expression in the peri‐infarct area of brain was significantly elevated, which was associated with local elevation in EXs secretion. Rab27a deficiency dramatically decreased the level of EXs in brain tissue of normal and tMCAO‐treated mice, and Rab27a−/− mice displayed an increase in infarct volume and NDS, and a decrease in cMVD and CBF following tMCAO. Pre‐infusion of EXWT increased the brain EXs levels in the tMCAO operated Rab27a−/− mice, accompanied with an increase in cMVD and CBF, and a decrease in infarct volume, NDS, ROS production, and apoptosis. The effects of EXRab27a−/− infusion were much diminished although in a dose‐dependent manner. In OGD‐treated ECs, EXRab27a−/− showed less effectivity than EXWT in decreasing ROS overproduction and apoptosis, paralleling with down‐regulated expression of NOX2 and cleaved caspase‐3. Conclusion Our study demonstrates that Rab27a controls brain EXs secretion and functions, contributing to cerebral vascular protection from ischemic insult by preventing oxidative stress and apoptosis via down‐regulating NOX2 and cleaved caspase‐3 expression.
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Affiliation(s)
- Xiaotang Ma
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Institute of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Jia Zhao
- Emergency Department, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Suqing Li
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Institute of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yan Wang
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Institute of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, China
| | - Jinhua Liu
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Institute of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yumeng Shi
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Institute of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Jiehong Liu
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Institute of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yanyu Chen
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Institute of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yanfang Chen
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Qunwen Pan
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Institute of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
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29
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Li J, Li Y, Duan W, Zhao Z, Yang L, Wei W, Li J, Li Y, Yu Y, Dai B, Guo R. Shugan granule contributes to the improvement of depression-like behaviors in chronic restraint stress-stimulated rats by altering gut microbiota. CNS Neurosci Ther 2022; 28:1409-1424. [PMID: 35713215 PMCID: PMC9344086 DOI: 10.1111/cns.13881] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 05/16/2022] [Accepted: 05/24/2022] [Indexed: 12/14/2022] Open
Abstract
Aim The investigation aims to evaluate the potential effect of Shugan Granule (SGKL) on the gut, brain, and behaviors in rats exposed to chronic restraint stress (CRS). Methods The fecal microbiota and metabolite changes were studied in rats exposed to CRS and treated with SGKL (0.1 mg/kg/day). Depressive behaviors of these rats were determined through an open‐field experiment, forced swimming test, sucrose preference, and weighing. Moreover, LPS‐stimulated microglia and CRS‐stimulated rats were treated with SGKL to investigate the regulation between SGKL and the PI3K/Akt/pathway, which is inhibited by LY294002, a PI3K inhibitor. Results (i) SGKL improved the altered behaviors in CRS‐stimulated rats; (ii) SGKL ameliorated the CRS‐induced neuronal degeneration and tangled nerve fiber and also contributed to the recovery of intestinal barrier injury in these rats; (iii) SGKL inhibited the hippocampus elevations of TNF‐α, IL‐1β, and IL‐6 in response to CRS modeling; (iv) based on the principal coordinates analysis (PCoA), SGKL altered α‐diversity indices and shifted β‐diversity in CRS‐stimulated rats; (v) at the genus level, SGKL decreased the CRS‐enhanced abundance of Bacteroides; (vi) Butyricimonas and Candidatus Arthromitus were enriched in SGKL‐treated rats; (vii) altered gut microbiota and metabolites were correlated with behaviors, inflammation, and PI3K/Akt/mTOR pathway; (viii) SGKL increased the LPS‐decreased phosphorylation of the PI3K/Akt/mTOR pathway in microglia and inhibited the LPS‐induced microglial activation; (ix) PI3K/Akt/mTOR pathway inactivation reversed the SGKL effects in CRS rats. Conclusion SGKL targets the PI3K/Akt/mTOR pathway by altering gut microbiota and metabolites, which ameliorates altered behavior and inflammation in the hippocampus.
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Affiliation(s)
- Junnan Li
- Second Clinical Medical College, Beijing University of Chinese Medicine, Beijing, China
| | - Yannan Li
- Second Clinical Medical College, Beijing University of Chinese Medicine, Beijing, China
| | - Wenzhe Duan
- Second Clinical Medical College, Beijing University of Chinese Medicine, Beijing, China
| | - Zhonghui Zhao
- Second Clinical Medical College, Beijing University of Chinese Medicine, Beijing, China
| | - Lixuan Yang
- Second Clinical Medical College, Beijing University of Chinese Medicine, Beijing, China
| | - Wei Wei
- Second Clinical Medical College, Beijing University of Chinese Medicine, Beijing, China
| | - Jingchun Li
- Second Clinical Medical College, Beijing University of Chinese Medicine, Beijing, China
| | - Yang Li
- Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Yao Yu
- Beijing Changping Hospital of Integrated Chinese and Western Medicine, Beijing, China
| | - Baoan Dai
- Second Clinical Medical College, Beijing University of Chinese Medicine, Beijing, China
| | - Rongjuan Guo
- Department of Neurology, Dongfang Hospital Beijing University of Chinese Medicine, Beijing, China
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30
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Qi Z, Yuan S, Liu KJ, Ji X. Normobaric hyperoxia plays a neuroprotective role after cerebral ischemia by maintaining the redox homeostasis and the level of connexin43 in astrocytes. CNS Neurosci Ther 2022; 28:1509-1518. [PMID: 35698913 PMCID: PMC9437237 DOI: 10.1111/cns.13875] [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: 01/19/2022] [Revised: 05/17/2022] [Accepted: 05/19/2022] [Indexed: 12/02/2022] Open
Abstract
Introduction Acute cerebral ischemia is caused by an insufficient blood supply to brain tissue. Oxygen therapy, which is able to aid diffusion to reach the ischemic region, has been regarded as a possible treatment for cerebral ischemia. Recent animal and pilot clinical studies have reported that normobaric hyperoxia (NBO) showed neuroprotective effects if started soon after the onset of stroke. However, little is known about the role and mechanism of NBO treatment in astrocytes. Connexin43, one of the main gap junction proteins in astrocytes, is extremely sensitive to hypoxia and oxidative stress after cerebral ischemia. Aims In the present study, we used sutures to develop an ischemia/reperfusion model in rats to mimic clinical recanalization and investigated the role of connexin43 in NBO‐treated stroke rats, as well as the underlying mechanism of NBO therapy. Results Normobaric hyperoxia treatment maintained the homeostasis of oxidoreductases: glutathione peroxidase 4 (GPX4) and NADPH oxidase 4 (two important oxidoreductases) and rescued the ischemia/reperfusion‐induced downregulation of connexin43 protein in astrocytes. Furthermore, NBO treatment attenuated cerebral ischemia‐induced cytochrome c release from mitochondria and was involved in neuroprotective effects by regulating the GPX4 and connexin43 pathway, using Ferrostatin‐1 (an activator of GPX4) or Gap27 (an inhibitor of connexin43). Conclusions This study showed the neuroprotective effects of NBO treatment by reducing oxidative stress and maintaining the level of connexin43 in astrocytes, which could be used for the clinical treatment of ischemic stroke.
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Affiliation(s)
- Zhifeng Qi
- Department of Neurology, Beijing Institute for Brain Disorders, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Shuhua Yuan
- Department of Neurology, Beijing Institute for Brain Disorders, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Ke Jian Liu
- Department of Pharmaceutical Sciences, University of New Mexico, Albuquerque, New Mexico, USA
| | - Xunming Ji
- Department of Neurology, Beijing Institute for Brain Disorders, Xuanwu Hospital of Capital Medical University, Beijing, China.,Center of Stroke, Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
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Wang X, Sun H, Cui L, Wang X, Ren C, Tong Z, Ji X. Acute high-altitude hypoxia exposure causes neurological deficits via formaldehyde accumulation. CNS Neurosci Ther 2022; 28:1183-1194. [PMID: 35582960 PMCID: PMC9253739 DOI: 10.1111/cns.13849] [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: 12/19/2021] [Revised: 04/03/2022] [Accepted: 04/06/2022] [Indexed: 11/03/2022] Open
Abstract
INTRODUCTION Acute high-altitude hypoxia exposure causes multiple adverse neurological consequences. However, the exact mechanisms are still unclear, and there is no targeted treatment with few side effects. Excessive cerebral formaldehyde (FA) impairs numerous functions, and can be eliminated by nano-packed coenzyme Q10 (CoQ10). AIMS In this study, we aimed to investigate whether cerebral FA was accumulated after hypobaric hypoxia exposure, and further explored the preventative effect of CoQ10 through FA elimination. RESULTS Accumulated cerebral FA was found in C57BL/6 mice after acute high-altitude hypoxia exposure, which resulted in FA metabolic disturbance with the elevation of semicarbazide-sensitive amine oxidase, and declination of aldehyde dehydrogenase-2. Excessive FA was also found to induce neuronal ferroptosis in vivo. Excitingly, administration with CoQ10 for 3 days before acute hypobaric hypoxia reduced cerebral FA accumulation, alleviated subsequent neuronal ferroptosis, and preserved neurological functions. CONCLUSION Cerebral FA accumulation mediates neurological deficits under acute hypobaric hypoxia, and CoQ10 supplementation may be a promising preventative strategy for visitors and sojourners at plateau.
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Affiliation(s)
- Xiaoyin Wang
- Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China.,Capital Medical University, Beijing, China.,Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - Haochen Sun
- Department of Neurology, Affiliated Brain Hospital of Nanjing Medical University, Nanjing, China
| | - Lili Cui
- Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Xian Wang
- Capital Medical University, Beijing, China.,Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - Changhong Ren
- Beijing Key Laboratory of Hypoxia Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Zhiqian Tong
- Institute of Aging, Key Laboratory of Alzheimer's Disease of Zhejiang Province, School of Mental Health, Wenzhou Medical University, Wenzhou, China
| | - Xunming Ji
- Capital Medical University, Beijing, China.,Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China.,Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
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