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Wen Y, Xu J, Shen J, Tang Z, Li S, Zhang Q, Li J, Sun J. Esketamine Prevents Postoperative Emotional and Cognitive Dysfunction by Suppressing Microglial M1 Polarization and Regulating the BDNF-TrkB Pathway in Ageing Rats with Preoperative Sleep Disturbance. Mol Neurobiol 2024; 61:5680-5698. [PMID: 38221533 PMCID: PMC11249437 DOI: 10.1007/s12035-023-03860-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 12/04/2023] [Indexed: 01/16/2024]
Abstract
Postoperative depression (POD) and postoperative cognitive dysfunction (POCD) have placed heavy burden on patients' physical and mental health in recent years. Sleep disturbance before surgery is a common phenomenon that has been increasingly believed to affect patients' recovery, especially in aged patients, while little attention has been paid to sleep disruption before surgery and the potential mechanism remains ambiguous. Ketamine has been reported to attenuate POCD after cardiac surgery and elicit rapid-acting and sustained antidepressant actions. The present study aimed to clarify the effect of esketamine's (the S-enantiomer of ketamine) protective effects and possible mechanisms of action in POCD and POD. Our results showed that sleep disturbance before surgery exacerbated microglial M1 polarization and microglial BDNF-TrkB signalling dysfunction induced by surgery, resulting in postoperative emotional changes and cognitive impairments. Notably, treatment with esketamine reversed the behavioural abnormalities through inhibiting the M1 polarization of microglia and the inflammatory response thus improving BDNF-TrkB signalling in vivo and vitro. In addition, esketamine administration also reversed the impaired hippocampal synaptic plasticity which has been perturbed by sleep disturbance and surgery. These findings warrant further investigations into the interplay of esketamine and may provide novel ideas for the implication of preoperative preparations and the prevention of postoperative brain-related complications.
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Affiliation(s)
- Yuxin Wen
- Zhejiang University School of Medicine, Hangzhou, China
| | - Jiawen Xu
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University, Hangzhou, China
| | - Jiahong Shen
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University, Hangzhou, China
| | - Zili Tang
- Department of Anesthesiology, The Fourth Clinical School of Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Shuxin Li
- Department of Anesthesiology, The Fourth Clinical School of Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Qun Zhang
- School of Second Clinical Medical College, Wenzhou Medical University, Wenzhou, China
| | - Jiaqi Li
- Zhejiang University School of Medicine, Hangzhou, China
| | - Jianliang Sun
- Zhejiang University School of Medicine, Hangzhou, China.
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University, Hangzhou, China.
- Department of Anesthesiology, The Fourth Clinical School of Medicine, Zhejiang Chinese Medical University, Hangzhou, China.
- School of Second Clinical Medical College, Wenzhou Medical University, Wenzhou, China.
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2
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Jiang T, Wang J, Wang Y, Jiang J, Zhou J, Wang X, Zhang D, Xu J. Mitochondrial protein prohibitin promotes learning memory recovery in mice following intracerebral hemorrhage via CAMKII/CRMP signaling pathway. Neurochem Int 2023; 171:105637. [PMID: 37923298 DOI: 10.1016/j.neuint.2023.105637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/26/2023] [Accepted: 10/31/2023] [Indexed: 11/07/2023]
Abstract
Prohibitin (PHB) is a mitochondrial inner membrane protein with neuroprotective, antioxidant, and apoptosis-reducing effects. This study aimed to explore the role of PHB in pathological symptoms, behavioral deficits, and cognitive impairment in a collagenase-IV-induced intracerebral hemorrhage (ICH) murine model. In this study, mice that received collagenase IV injection were pretreated with PHB or saline 21 days prior to modeling. The role of PHB in memory and learning ability was monitored using the Morris water maze, Y-maze, and rotarod, social, startle, and nest-building tests. The effect of PHB on depression-like symptoms was examined using the forced swimming, tail suspension, and sucrose preference tests. Subsequently, mouse samples were analyzed using immunohistochemistry, western blotting, Perls staining, Nissl staining, and gene sequencing. Results showed that collagenase IV significantly induced behavioral deficits, brain edema, cognitive impairment, and depressive symptoms. PHB overexpression effectively alleviated memory, learning, and motor deficits in mice with ICH. PHB markedly inhibited the number of terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick-end labeling-positive cells and protein levels of ionized calcium-binding adapter molecule 1, glial fibrillary acidic protein, and interleukin-1β in the perihematomal region of ICH mice. PHB overexpression also remarkably promoted production of neurologin1 (NLGL1), and upregulated levels of Ca2+-calmodulin-dependent kinase II (CaMKII) and collapsin response mediator protein-1 (CRMP1) proteins. In conclusion, PHB overexpression can effectively alleviate the neurological deficits and neurodegeneration around the hematoma region. This may play a protective role by upregulating the expression of NLGL1 and promoting expression of CaMKII and CRMP1.
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Affiliation(s)
- Tianlin Jiang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225009, China
| | - Jiahua Wang
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225009, China; Department of Anesthesia, Affiliated Hospital of Yangzhou University, Yangzhou, 225001, China
| | - Yanli Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jiwei Jiang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jiawei Zhou
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225009, China; Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou University, YangZhou, 225001, China
| | - Xiaohong Wang
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225009, China; Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou University, YangZhou, 225001, China.
| | - Deke Zhang
- Department of Pharmacy, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, No. 16369, Jingshi Road, Lixia district, Jinan City, Shandong Province, China.
| | - Jun Xu
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
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3
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Yao N, Li Y, Han J, Wu S, Liu X, Wang Q, Li Z, Shi FD. Microglia-derived CCL20 deteriorates neurogenesis following intraventricular hemorrhage. Exp Neurol 2023; 370:114561. [PMID: 37802382 DOI: 10.1016/j.expneurol.2023.114561] [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: 06/13/2023] [Revised: 09/17/2023] [Accepted: 10/01/2023] [Indexed: 10/09/2023]
Abstract
Intraventricular hemorrhage (IVH) commonly occurs as an extension of intracerebral hemorrhage (ICH) into the brain ventricular system, leading to worse outcomes without effective management. Using a mouse model of IVH, we found that impaired neurogenesis is evident in the subventricular zone (SVZ), along with persistent microglia activation, leukocyte infiltration and cell death. Pharmacological depletion of microglia using PLX3397, an inhibitor of colony stimulating factor 1 receptor (CSF1R), promotes neurogenesis, and alleviated delayed functional impairments in IVH mice. Meanwhile, an elevated level of microglia-derived CC chemokine ligand 20 (CCL20) is observed in the SVZ following IVH, which can induce the upregulation of pro-inflammatory factors in microglia and impair the proliferation and survival of neural stem cells (NSCs) in vitro. Blocking CCL20 in microglia leads to downregulation of protein kinase B (Akt)/mammalian target of rapamycin (mTOR)/the nuclear factor-κB (NF-κB) signaling pathway, which may contribute to CCL20-dependent pro-inflammatory responses and neural injury. These findings demonstrate a detrimental role of microglia in the neurogenesis and neurorepair after IVH in which CCL20 likely plays a role.
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Affiliation(s)
- Nan Yao
- Department of Neurology, Institute of Neuroimmunology, Tianjin Medical University General Hospital, Tianjin, China
| | - Yulin Li
- Department of Neurology, Institute of Neuroimmunology, Tianjin Medical University General Hospital, Tianjin, China
| | - Jinrui Han
- Department of Neurology, Institute of Neuroimmunology, Tianjin Medical University General Hospital, Tianjin, China
| | - Siting Wu
- Department of Neurology, Institute of Neuroimmunology, Tianjin Medical University General Hospital, Tianjin, China
| | - Xin Liu
- Department of Neurology, Institute of Neuroimmunology, Tianjin Medical University General Hospital, Tianjin, China
| | - Qiuyu Wang
- Department of Neurology, Institute of Neuroimmunology, Tianjin Medical University General Hospital, Tianjin, China
| | - Zhiguo Li
- Department of Neurology, Institute of Neuroimmunology, Tianjin Medical University General Hospital, Tianjin, China
| | - Fu-Dong Shi
- Department of Neurology, Institute of Neuroimmunology, Tianjin Medical University General Hospital, Tianjin, China; Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
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Okamura M, Inoue T, Takamatsu Y, Maejima H. Pharmacological inhibition of histone deacetylases ameliorates cognitive impairment after intracerebral hemorrhage with epigenetic alteration in the hippocampus. J Stroke Cerebrovasc Dis 2023; 32:107275. [PMID: 37523880 DOI: 10.1016/j.jstrokecerebrovasdis.2023.107275] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 07/15/2023] [Accepted: 07/20/2023] [Indexed: 08/02/2023] Open
Abstract
OBJECTIVES Post-stroke cognitive impairment (PSCI) interferes with neurorehabilitation in patients with stroke. Epigenetic regulation of the hippocampus has been targeted to ameliorate cognitive function. In particular, the acetylation level of histones is modulated by exercise, a potent therapy for patients with stroke. MATERIALS AND METHODS We examined the effects of exercise and pharmacological inhibition of histone deacetylase (HDAC) using sodium butyrate (NaB) on cognitive function and epigenetic factors in the hippocampus after intracerebral hemorrhage (ICH) to seek beneficial neuronal conditioning against PSCI. Forty rats were randomly assigned to five groups: sham, control, NaB, exercise, and NaB plus exercise groups (n=8 in each group). Except for those in the sham group, all rats underwent stereotaxic ICH surgery with a microinjection of collagenase solution. Intraperitoneal administration of NaB (300 mg/kg) and treadmill exercise (11 m/min for 30 min) were conducted for approximately 4 weeks starting 3 days post-surgery. RESULTS ICH reduced cognitive function, as detected by the object location test, accompanied by enhanced activity of HDACs. Although exercise did not modulate HDAC activity or cognitive function, repetitive NaB administration increased HDAC activity and ameliorated cognitive impairment induced by ICH. CONCLUSIONS This study suggests that pharmacological treatment with an HDAC inhibitor could potentially present an enriched epigenetic platform in the hippocampus and ameliorate PSCI for neurorehabilitation following ICH.
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Affiliation(s)
- Misato Okamura
- Graduate School of Health Sciences, Hokkaido University, Kita 12 Nishi 5, Kita-ku, Sapporo, 060-0812, Japan
| | - Takahiro Inoue
- Graduate School of Health Sciences, Hokkaido University, Kita 12 Nishi 5, Kita-ku, Sapporo, 060-0812, Japan
| | - Yasuyuki Takamatsu
- Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University, Kita 12 Nishi 5, Kita-ku, Sapporo, 060-0812, Japan
| | - Hiroshi Maejima
- Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University, Kita 12 Nishi 5, Kita-ku, Sapporo, 060-0812, Japan.
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5
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Sheu ML, Pan LY, Yang CN, Sheehan J, Pan LY, You WC, Wang CC, Pan HC. Thrombin-Induced Microglia Activation Modulated through Aryl Hydrocarbon Receptors. Int J Mol Sci 2023; 24:11416. [PMID: 37511175 PMCID: PMC10380349 DOI: 10.3390/ijms241411416] [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: 04/07/2023] [Revised: 07/01/2023] [Accepted: 07/03/2023] [Indexed: 07/30/2023] Open
Abstract
Thrombin is a multifunctional serine protein which is closely related to neurodegenerative disorders. The Aryl hydrocarbon receptor (AhR) is well expressed in microglia cells involving inflammatory disorders of the brain. However, it remains unclear as to how modulation of AhR expression by thrombin is related to the development of neurodegeneration disorders. In this study, we investigated the role of AhR in the development of thrombin-induced neurodegenerative processes, especially those concerning microglia. The primary culture of either wild type or AhR deleted microglia, as well as BV-2 cell lines, was used for an in vitro study. Hippocampal slice culture and animals with either wild type or with AhR deleted were used for the ex vivo and in vivo studies. Simulations of ligand protein docking showed a strong integration between the thrombin and AhR. In thrombin-triggered microglia cells, deleting AhR escalated both the NO release and iNOS expression. Such effects were abolished by the administration of the AhR agonist. In thrombin-activated microglia cells, downregulating AhR increased the following: vascular permeability, pro-inflammatory genetic expression, MMP-9 activity, and the ratio of M1/M2 phenotype. In the in vivo study, thrombin induced the activation of microglia and their volume, thereby contributing to the deterioration of neurobehavior. Deleting AhR furthermore aggravated the response in terms of impaired neurobehavior, increasing brain edema, aggregating microglia, and increasing neuronal death. In conclusion, thrombin caused the activation of microglia through increased vessel permeability, expression of inflammatory response, and phenotype of M1 microglia, as well the MMP activity. Deleting AhR augmented the above detrimental effects. These findings indicate that the modulation of AhR is essential for the regulation of thrombin-induced brain damages and that the AhR agonist may harbor the potentially therapeutic effect in thrombin-induced neurodegenerative disorder.
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Affiliation(s)
- Meei-Ling Sheu
- Institute of Biomedical Sciences, National Chung-Hsing University, Taichung 40227, Taiwan;
- Department of Medical Research, Taichung Veterans General Hospital, Taichung 40210, Taiwan
- Ph.D. Program in Translational Medicine, Rong Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung 40227, Taiwan
| | - Liang-Yi Pan
- Faculty of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
| | - Cheng-Ning Yang
- Department of Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei 106319, Taiwan;
| | - Jason Sheehan
- Department of Neurosurgery, University of Virginia, Charlottesville, VA 22904, USA;
| | - Liang-Yu Pan
- Faculty of Medicine, Poznan University of Medical Sciences, 61-701 Poznań, Poland;
| | - Weir-Chiang You
- Department of Radiation Oncology, Taichung Veterans General Hospital, Taichung 40210, Taiwan;
| | - Chien-Chia Wang
- Department of Life Sciences, National Central University, Taoyuan 32001, Taiwan;
| | - Hung-Chuan Pan
- Department of Medical Research, Taichung Veterans General Hospital, Taichung 40210, Taiwan
- Ph.D. Program in Translational Medicine, Rong Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung 40227, Taiwan
- Department of Neurosurgery, Taichung Veterans General Hospital, Taichung 40210, Taiwan
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6
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Iannucci J, Grammas P. Thrombin, a Key Driver of Pathological Inflammation in the Brain. Cells 2023; 12:cells12091222. [PMID: 37174621 PMCID: PMC10177239 DOI: 10.3390/cells12091222] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/21/2023] [Accepted: 04/20/2023] [Indexed: 05/15/2023] Open
Abstract
Neurodegenerative diseases, including Alzheimer's disease (AD), are major contributors to death and disability worldwide. A multitude of evidence suggests that neuroinflammation is critical in neurodegenerative disease processes. Exploring the key mediators of neuroinflammation in AD, a prototypical neurodegenerative disease, could help identify pathologic inflammatory mediators and mechanisms in other neurodegenerative diseases. Elevated levels of the multifunctional inflammatory protein thrombin are commonly found in conditions that increase AD risk, including diabetes, atherosclerosis, and traumatic brain injury. Thrombin, a main driver of the coagulation cascade, has been identified as important to pathological events in AD and other neurodegenerative diseases. Furthermore, recent evidence suggests that coagulation cascade-associated proteins act as drivers of inflammation in the AD brain, and studies in both human populations and animal models support the view that abnormalities in thrombin generation promote AD pathology. Thrombin drives neuroinflammation through its pro-inflammatory activation of microglia, astrocytes, and endothelial cells. Due to the wide-ranging pro-inflammatory effects of thrombin in the brain, inhibiting thrombin could be an effective strategy for interrupting the inflammatory cascade which contributes to neurodegenerative disease progression and, as such, may be a potential therapeutic target for AD and other neurodegenerative diseases.
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Affiliation(s)
- Jaclyn Iannucci
- Department of Neuroscience and Experimental Therapeutics, School of Medicine, Texas A&M University, Bryan, TX 77807, USA
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7
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Meng J, Zhang J, Fang J, Li M, Ding H, Zhang W, Chen C. Dynamic inflammatory changes of the neurovascular units after ischemic stroke. Brain Res Bull 2022; 190:140-151. [DOI: 10.1016/j.brainresbull.2022.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 07/21/2022] [Accepted: 10/04/2022] [Indexed: 11/16/2022]
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8
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Gu YH, Hawkins BT, Izawa Y, Yoshikawa Y, Koziol JA, Del Zoppo GJ. Intracerebral hemorrhage and thrombin-induced alterations in cerebral microvessel matrix. J Cereb Blood Flow Metab 2022; 42:1732-1747. [PMID: 35510668 PMCID: PMC9441730 DOI: 10.1177/0271678x221099092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Four phase III clinical trials of oral direct factor Xa or thrombin inhibitors demonstrated significantly lower intracranial hemorrhage compared to warfarin in patients with nonvalvular-atrial fibrillation. This is counter-intuitive to the principle that inhibiting thrombosis should increase hemorrhagic risk. We tested the novel hypothesis that anti-thrombin activity decreases the risk of intracerebral hemorrhage by directly inhibiting thrombin-mediated degradation of cerebral microvessel basal lamina matrix, responsible for preventing hemorrhage. Collagen IV, laminin, and perlecan each contain one or more copies of the unique α-thrombin cleavage site consensus sequence. In blinded controlled experiments, α-thrombin significantly degraded each matrix protein in vitro and in vivo in a concentration-dependent fashion. In vivo stereotaxic injection of α-thrombin significantly increased permeability, local IgG extravasation, and hemoglobin (Hgb) deposition together with microvessel matrix degradation in a mouse model. In all formats the direct anti-thrombin dabigatran completely inhibited matrix degradation by α-thrombin. Fourteen-day oral exposure to dabigatran etexilate-containing chow completely inhibited matrix degradation, the permeability to large molecules, and cerebral hemorrhage associated with α-thrombin. These experiments demonstrate that thrombin can degrade microvessel matrix, leading to hemorrhage, and that inhibition of microvessel matrix degradation by α-thrombin decreases cerebral hemorrhage. Implications for focal ischemia and other conditions are discussed.
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Affiliation(s)
- Yu-Huan Gu
- Division of Hematology, Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
| | - Brian T Hawkins
- Division of Hematology, Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA.,Duke University Center for WaSH-AID, Department of Eklectrical and Computer Engineering, Duke University, Durham, NC, USA
| | - Yoshikane Izawa
- Division of Hematology, Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA.,Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Yoji Yoshikawa
- Division of Hematology, Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
| | - James A Koziol
- Department of Molecular Medicine, Scripps Research Institute, La Jolla, CA, USA
| | - Gregory J Del Zoppo
- Division of Hematology, Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA.,Department of Neurology, University of Washington School of Medicine, Seattle, WA, USA
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9
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Thangameeran SIM, Pang CY, Lee CH, Tsai ST, Hu WF, Liew HK. Experimental animal models and evaluation techniques in intracerebral hemorrhage. Tzu Chi Med J 2022; 35:1-10. [PMID: 36866349 PMCID: PMC9972928 DOI: 10.4103/tcmj.tcmj_119_22] [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: 04/27/2022] [Revised: 05/15/2022] [Accepted: 06/10/2022] [Indexed: 11/04/2022] Open
Abstract
Intracerebral hemorrhage (ICH) is the most lethal type of cerebral stroke without effective therapy. Although clinical trials with various surgeries have been conducted, none have improved clinical outcomes compared to the current medical management for ICH. Several ICH animal models, including autologous blood injection, collagenase injection, thrombin injection, and microballoon inflation methods, have been developed to elucidate the underlying mechanisms of ICH-induced brain injury. These models could also be used for discovering new therapy for ICH preclinically. We summarize the existing ICH animal models and the evaluation parameters used to measure the disease outcomes. We conclude that these models, resembling the different aspects of ICH pathogenesis, have their advantages and disadvantages. None of the current models closely represent the severity of ICH seen in clinical settings. More appropriate models are needed to streamline ICH's clinical outcomes and be used for validating newly developed treatment protocols.
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Affiliation(s)
| | - Cheng-Yoong Pang
- Institute of Medical Sciences, Tzu Chi University, Hualien, Taiwan,Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | - Chien-Hui Lee
- Neuro-Medical Scientific Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan,Department of Neurosurgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | - Sheng-Tzung Tsai
- Neuro-Medical Scientific Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan,Department of Neurosurgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | - Wei-Fen Hu
- Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan,PhD Program in Pharmacology and Toxicology, Tzu Chi University, Hualien, Taiwan
| | - Hock-Kean Liew
- Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan,Neuro-Medical Scientific Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan,PhD Program in Pharmacology and Toxicology, Tzu Chi University, Hualien, Taiwan,Address for correspondence: Dr. Hock-Kean Liew, Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, 707, Section 3, Chung-Yang Road, Hualien, Taiwan. E-mail:
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10
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Wu L, Zhan Q, Liu P, Zheng H, Liu M, Min J, Xie L, Wu W. LncRNA TCONS_00145741 Knockdown Prevents Thrombin-Induced M1 Differentiation of Microglia in Intracerebral Hemorrhage by Enhancing the Interaction Between DUSP6 and JNK. Front Cell Dev Biol 2022; 9:684842. [PMID: 35127692 PMCID: PMC8809462 DOI: 10.3389/fcell.2021.684842] [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: 03/25/2021] [Accepted: 12/06/2021] [Indexed: 11/13/2022] Open
Abstract
Background: The differentiation of microglia from M1 to M2 exerts a pivotal role in the aggression of intracerebral hemorrhage (ICH), and long non-coding RNAs (lncRNAs) are associated with the differentiation of microglia. However, the underlying mechanism had not been fully clarified. Methods: The expression profile of lncRNAs in thrombin-induced primary microglia was analyzed by RNA sequencing. Under thrombin treatment, the effect of lncRNA TCONS_00145741 on the differentiation of microglia was determined by immunofluorescence staining, quantitative real-time PCR, and Western blot. The potential mechanism and related signaling pathways of TCONS_00145741 in the M1 and M2 differentiation of microglia in ICH were assessed by Gene Ontology analysis, flow cytometry, RNA pull-down, RNA Immunoprecipitation, and RNA fluorescence in situ hybridization followed by immunofluorescence analysis. Results: LncRNA TCONS_00145741 expression was elevated in the thrombin-induced primary microglia, and the interference with TCONS_00145741 restrained the M1 differentiation of microglia and facilitated the M2 differentiation under thrombin treatment. The interference with TCONS_00145741 restrained the activation of the JNK pathway in microglia under thrombin treatment and repressed the JNK phosphorylation levels by enhancing the interaction between DUSP6 and JNK. In vivo experiments further illustrated that the interference with TCONS_00145741 alleviated ICH. Conclusion: LncRNA TCONS_00145741 knockdown prevented thrombin-induced M1 differentiation of microglia in ICH by enhancing the interaction between DUSP6 and JNK. This study might provide a promising target for the clinical treatment of ICH.
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Affiliation(s)
| | | | | | | | | | | | | | - Wei Wu
- Department of Neurology, the Second Affiliated Hospital of Nanchang University, Institute of Neuroscience, Nanchang University, Nanchang, China
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11
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Li L, Qi C, Liu Y, Shen Y, Zhao X, Qin H, Zhang Y, Yu T. MicroRNA miR-27b-3p regulate microglial inflammation response and cell apoptosis by inhibiting A20 (TNF-α-induced protein 3). Bioengineered 2021; 12:9902-9913. [PMID: 34895052 PMCID: PMC8810141 DOI: 10.1080/21655979.2021.1969195] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Inflammatory reaction exerts a pivotal role in secondary damage after cerebral hemorrhage and spinal cord injury. miRNAs can both promote and inhibit inflammatory actions among microglial cells. The objective of the present paper was to figure out whether miR-27b-3p produced regulatory effects during processes of microglial inflammation. Lipopolysaccharides (LPS) were used to prepare microglial activation models. Following miR-27b-3p overexpression and interference, the RNA and protein levels of tumor necrosis factor (TNF)-α, interleukin (IL)-6, and IL-1β were subjected to real-time fluorescent quantitative PCR (qPCR) and western blot assays, respectively. Cellular apoptosis was subjected to flow cytometry and miR-27b-3p target genes were visualized using a dual luciferase reporter system for verification. The levels of TNF-α, IL-6, and IL-1β mRNA in miR-27b-3p-overexpressed microglial cells were markedly increased compared to the control. Apoptosis of microglial cells was increased markedly in the overexpressed miR-27b-3p group compared to the negative control. Conversely, a different result was presented in the microglial transfected with miR-27b-3p inhibitors. The downregulation of A20, a miR-27b-3p target gene, mediated levels of TNF-α, IL-6, and IL-1β. Furthermore, A20 reduced microglial apoptosis. These data revealed that miR-27b-3p could mediate not only microglia activation but also neuroinflammation via downregulating A20 expression. Thus, miR-27b-3p is regarded as gene therapy in treating cerebral hemorrhage and spinal cord injury.
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Affiliation(s)
- Liping Li
- Department of Orthopedic Surgery, The Affiliated Qingdao Central Hospital of Qingdao University, Qingdao, Shandong, China.,Department of Orthopedic Surgery, The Second Clinical Medical College of Qingdao University, Qingdao, Shandong, China
| | - Chao Qi
- Department of Orthopedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Yuanyuan Liu
- Department of Oncology, The Affiliated Qingdao Central Hospital of Qingdao University, Qingdao, Shandong, China.,Department of Oncology, The Second Clinical Medical College of Qingdao University, Qingdao, Shandong, China
| | - Youliang Shen
- Department of Orthopedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Xia Zhao
- Department of Orthopedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Han Qin
- Department of Orthopedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Yi Zhang
- Department of Orthopedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Tengbo Yu
- Department of Orthopedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
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12
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Physical Exercise as a Modulator of Vascular Pathology and Thrombin Generation to Improve Outcomes After Traumatic Brain Injury. Mol Neurobiol 2021; 59:1124-1138. [PMID: 34846694 DOI: 10.1007/s12035-021-02639-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 11/04/2021] [Indexed: 10/19/2022]
Abstract
Disruption of the blood-brain barrier and occurrence of coagulopathy after traumatic brain injury (TBI) have important implications for multiple secondary injury processes. Given the extent of post-traumatic changes in neuronal function, significant alterations in some targets, such thrombin (a protease that plays a physiological role in maintaining blood coagulation), play an important role in TBI-induced pathophysiology. Despite the magnitude of thrombin in synaptic plasticity being concentration-dependent, the mechanisms underlying TBI have not been fully elucidated. The understanding of this post-injury neurovascular dysregulation is essential to establish scientific-based rehabilitative strategies. One of these strategies may be supporting physical exercise, considering its relevance in reducing damage after a TBI. However, there are caveats to consider when interpreting the effect of physical exercise on neurovascular dysregulation after TBI. To complete this picture, this review will describe how the interactions established between blood-borne factors (such as thrombin) and physical exercise alter the TBI pathophysiology.
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13
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Cognitive Dysfunction after Heart Disease: A Manifestation of the Heart-Brain Axis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:4899688. [PMID: 34457113 PMCID: PMC8387198 DOI: 10.1155/2021/4899688] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 07/31/2021] [Indexed: 12/26/2022]
Abstract
The functions of the brain and heart, which are the two main supporting organs of human life, are closely linked. Numerous studies have expounded the mechanisms of the brain-heart axis and its related clinical applications. However, the effect of heart disease on brain function, defined as the heart-brain axis, is less studied even though cognitive dysfunction after heart disease is one of its most frequently reported manifestations. Hypoperfusion caused by heart failure appears to be an important risk factor for cognitive decline. Blood perfusion, the immune response, and oxidative stress are the possible main mechanisms of cognitive dysfunction, indicating that the blood-brain barrier, glial cells, and amyloid-β may play active roles in these mechanisms. Clinicians should pay more attention to the cognitive function of patients with heart disease, especially those with heart failure. In addition, further research elucidating the associated mechanisms would help discover new therapeutic targets to intervene in the process of cognitive dysfunction after heart disease. This review discusses cognitive dysfunction in relation to heart disease and its potential mechanisms.
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14
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Peterson C, Umoye AO, Puglisi CH, Waldau B. Mechanisms of memory impairment in animal models of nontraumatic intracranial hemorrhage: A systematic review of the literature. BRAIN HEMORRHAGES 2021; 3:77-93. [DOI: 10.1016/j.hest.2021.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022] Open
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15
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Choi H, Mun S, Joo EJ, Lee KY, Kang HG, Lee J. Discovery of Screening Biomarkers for Major Depressive Disorder in Remission by Proteomic Approach. Diagnostics (Basel) 2021; 11:diagnostics11030539. [PMID: 33802981 PMCID: PMC8002827 DOI: 10.3390/diagnostics11030539] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/12/2021] [Accepted: 03/15/2021] [Indexed: 11/29/2022] Open
Abstract
Major depressive disorder (MDD) is a common disorder involving depressive mood and decreased motivation. Due to its high heterogeneity, novel biomarkers are required to diagnose MDD. In this study, a proteomic method was used to identify a new MDD biomarker. Using sequential window acquisition of all theoretical mass spectra acquisitions and multiple reaction monitoring analysis via mass spectrometry, relative and absolute quantification of proteins in the sera was performed. The results of the relative quantitation by sequential window acquisition for all theoretical mass spectra data showed that seven proteins were significantly differently expressed between MDD patients and other patients with remission status. However, absolute quantification by multiple reaction monitoring analysis identified prothrombin as the only significantly upregulated protein in the depressive state compared to remission (p < 0.05) and was, thus, subsequently selected as an MDD biomarker. The area under the curve for prothrombin was 0.66. Additionally, increased prothrombin/thrombin induced hyper-activation of platelets via activating protease-activated receptors, a feature associated with MDD; specifically, activated platelets secrete various molecules related to MDD, including brain-derived neurotropic factors and serotonin. Therefore, prothrombin is a potential screening, prognostic, and diagnostic marker for MDD.
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Affiliation(s)
- Hyebin Choi
- Department of Senior Healthcare, Graduate School, Eulji University, Seongnam 13135, Korea; (H.C.); (S.M.)
| | - Sora Mun
- Department of Senior Healthcare, Graduate School, Eulji University, Seongnam 13135, Korea; (H.C.); (S.M.)
| | - Eun-Jeong Joo
- Department of Neuropsychiatry, School of Medicine, Eulji University, Daejeon 34824, Korea; (E.-J.J.); (K.Y.L.)
- Department of Psychiatry, Uijeongbu Eulji Medical Center, Eulji University, Gyeonggi 11759, Korea
| | - Kyu Young Lee
- Department of Neuropsychiatry, School of Medicine, Eulji University, Daejeon 34824, Korea; (E.-J.J.); (K.Y.L.)
- Department of Psychiatry, Eulji General Hospital, Seoul 01830, Korea
| | - Hee-Gyoo Kang
- Department of Senior Healthcare, Graduate School, Eulji University, Seongnam 13135, Korea; (H.C.); (S.M.)
- Department of Biomedical Laboratory Science, College of Health Science, Eulji University, Seongnam 13135, Korea
- Correspondence: (H.-G.K.); (J.L.); Tel.: +82-31-740-7315 (H.-G.K.); +82-42-259-1752 (J.L.)
| | - Jiyeong Lee
- Department of Biomedical Laboratory Science, College of Health Science, Eulji University, Uijeongbu 11759, Korea
- Correspondence: (H.-G.K.); (J.L.); Tel.: +82-31-740-7315 (H.-G.K.); +82-42-259-1752 (J.L.)
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16
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Brombacher T, Ajonijebu D, Scibiorek M, Berkiks I, Moses B, Mpotje T, Brombacher F. IL-4Rα deletion disrupts psychomotor performance and reference memory in mice while sparing behavioural phenotype associated with spatial learning. Brain Behav Immun 2021; 92:157-164. [PMID: 33301870 PMCID: PMC7909383 DOI: 10.1016/j.bbi.2020.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/02/2020] [Accepted: 12/04/2020] [Indexed: 11/20/2022] Open
Abstract
Contribution of immune mediators, interleukin-4 and interferon gamma to cognitive functioning is receiving increasing attention. However, the fundamental question about how heterodimeric interleukin-4 receptor alpha- and interferon gamma- producing myeloid cells converge to influence hippocampal-dependent spatial memory tasks through immunomodulation of multisensory inputs from other brain areas remains unexplored. Here, we show that mice lacking interleukin-4 receptor alpha are able to successfully learn spatial tasks, while reference memory is impaired. Moreover, the absence of interleukin-4 receptor alpha leads to simultaneous increase in proportions of CD11b + myeloid cells in the hippocampus and thalamus, but not the brainstem during acquisition. Interleukin-4 receptor alpha deletion significantly decreased expression of myeloid cell-derived interferon gamma in the thalamus during the acquisition phase and simultaneously increased brain-derived neurotrophic factor production in the thalamus and brainstem of trained mice. We provide evidence that interleukin-4 receptor alpha is essential for cognitive performance while training-induced alterations in interferon gamma activity and brain-derived neurotrophic factor signalling may contribute to neuromodulation of learned tasks and consequently affect systems-level memory encoding and consolidation.
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Affiliation(s)
- T.M. Brombacher
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town Component, South Africa,Division of Immunology, Institute of Infectious Disease and Molecular Medicine (IDM), Health Science Faculty, University of Cape Town, 7925, South Africa,Corresponding author at: University of Cape Town, Wernher & Beit Building, South, 7925 Cape Town, South Africa.
| | - D.C. Ajonijebu
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town Component, South Africa,Division of Immunology, Institute of Infectious Disease and Molecular Medicine (IDM), Health Science Faculty, University of Cape Town, 7925, South Africa
| | - M. Scibiorek
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town Component, South Africa,Division of Immunology, Institute of Infectious Disease and Molecular Medicine (IDM), Health Science Faculty, University of Cape Town, 7925, South Africa
| | - I. Berkiks
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town Component, South Africa,Division of Immunology, Institute of Infectious Disease and Molecular Medicine (IDM), Health Science Faculty, University of Cape Town, 7925, South Africa
| | - B.O. Moses
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town Component, South Africa,Division of Immunology, Institute of Infectious Disease and Molecular Medicine (IDM), Health Science Faculty, University of Cape Town, 7925, South Africa
| | - T. Mpotje
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town Component, South Africa,Division of Immunology, Institute of Infectious Disease and Molecular Medicine (IDM), Health Science Faculty, University of Cape Town, 7925, South Africa
| | - F. Brombacher
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town Component, South Africa,Division of Immunology, Institute of Infectious Disease and Molecular Medicine (IDM), Health Science Faculty, University of Cape Town, 7925, South Africa
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17
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Cao H, Seto SW, Bhuyan DJ, Chan HH, Song W. Effects of Thrombin on the Neurovascular Unit in Cerebral Ischemia. Cell Mol Neurobiol 2021; 42:973-984. [PMID: 33392917 DOI: 10.1007/s10571-020-01019-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 11/25/2020] [Indexed: 12/19/2022]
Abstract
Cerebral ischemia is a cerebrovascular disease with high morbidity and mortality that poses a significant burden on society and the economy. About 60% of cerebral ischemia is caused by thrombus, and the formation of thrombus proceeds from insoluble fibrin, following its transformation from liquid fibrinogen. In thrombus-induced ischemia, increased permeability of the blood-brain barrier (BBB), followed by the extravasation of blood components into the brain results in an altered brain microenvironment. Changes in the brain microenvironment affect brain function and the neurovascular unit (NVU), the working unit of the brain. Recent studies have reported that coagulation factors interact with the NVU and its components, but the specific function of this interaction is highly speculative and warrants further investigations. In this article, we reviewed the role of coagulation factors in cerebral ischemia and the role of coagulation factors in thrombosis. Additionally, the influence of thrombin on the NVU is introduced, as well as in the function of NVU, which may help to explore part of brain injury mechanism during ischemia. Lastly, we propose some novel therapeutic approaches on ischemic stroke by reducing the risk of coagulation.
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Affiliation(s)
- Hui Cao
- Institute of Basic Medical Sciences of Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing Key Laboratory of Pharmacology of Chinese Materia Medica, Beijing, 100091, China
| | - Sai Wang Seto
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, PR China.,NICM Health Research Institute, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Deep Jyoti Bhuyan
- NICM Health Research Institute, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Hoi Huen Chan
- Hong Kong Community College, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Wenting Song
- Institute of Basic Medical Sciences of Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing Key Laboratory of Pharmacology of Chinese Materia Medica, Beijing, 100091, China.
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18
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Bai Q, Sheng Z, Liu Y, Zhang R, Yong VW, Xue M. Intracerebral haemorrhage: from clinical settings to animal models. Stroke Vasc Neurol 2020; 5:388-395. [PMID: 33376200 PMCID: PMC7804065 DOI: 10.1136/svn-2020-000334] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/21/2020] [Accepted: 02/27/2020] [Indexed: 12/13/2022] Open
Abstract
Spontaneous intracerebral haemorrhage (ICH) is a devastating type of stroke with high mortality and morbidity and for which no effective treatments are available to date. Much experimental and clinical research have been performed to explore its mechanisms regard the subsequent inflammatory cascade and to seek the potential therapeutic strategies. The aim of this review is to discuss insights from clinical settings that have led to the development of numerous animal models of ICH. Some of the current and future challenges for clinicians to understand ICH are also surveyed.
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Affiliation(s)
- Qian Bai
- The Departments of Cerebrovascular Diseases; Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhaofu Sheng
- The Departments of Cerebrovascular Diseases; Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yang Liu
- The Departments of Cerebrovascular Diseases; Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ruiyi Zhang
- The Departments of Cerebrovascular Diseases; Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Voon Wee Yong
- Hotchkiss Brain Institute and Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
| | - Mengzhou Xue
- The Departments of Cerebrovascular Diseases; Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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19
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Role of Microglia in Modulating Adult Neurogenesis in Health and Neurodegeneration. Int J Mol Sci 2020; 21:ijms21186875. [PMID: 32961703 PMCID: PMC7555074 DOI: 10.3390/ijms21186875] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 09/18/2020] [Indexed: 02/06/2023] Open
Abstract
Microglia are the resident immune cells of the brain, constituting the powerhouse of brain innate immunity. They originate from hematopoietic precursors that infiltrate the developing brain during different stages of embryogenesis, acquiring a phenotype characterized by the presence of dense ramifications. Microglial cells play key roles in maintaining brain homeostasis and regulating brain immune responses. They continuously scan and sense the brain environment to detect any occurring changes. Upon detection of a signal related to physiological or pathological processes, the cells are activated and transform to an amoeboid-like phenotype, mounting adequate responses that range from phagocytosis to secretion of inflammatory and trophic factors. The overwhelming evidence suggests that microglia are crucially implicated in influencing neuronal proliferation and differentiation, as well as synaptic connections, and thereby cognitive and behavioral functions. Here, we review the role of microglia in adult neurogenesis under physiological conditions, and how this role is affected in neurodegenerative diseases.
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20
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Iannucci J, Renehan W, Grammas P. Thrombin, a Mediator of Coagulation, Inflammation, and Neurotoxicity at the Neurovascular Interface: Implications for Alzheimer's Disease. Front Neurosci 2020; 14:762. [PMID: 32792902 PMCID: PMC7393221 DOI: 10.3389/fnins.2020.00762] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 06/29/2020] [Indexed: 12/11/2022] Open
Abstract
The societal burden of Alzheimer’s disease (AD) is staggering, with current estimates suggesting that 50 million people world-wide have AD. Identification of new therapeutic targets is a critical barrier to the development of disease-modifying therapies. A large body of data implicates vascular pathology and cardiovascular risk factors in the development of AD, indicating that there are likely shared pathological mediators. Inflammation plays a role in both cardiovascular disease and AD, and recent evidence has implicated elements of the coagulation system in the regulation of inflammation. In particular, the multifunctional serine protease thrombin has been found to act as a mediator of vascular dysfunction and inflammation in both the periphery and the central nervous system. In the periphery, thrombin contributes to the development of cardiovascular disease, including atherosclerosis and diabetes, by inducing endothelial dysfunction and related inflammation. In the brain, thrombin has been found to act on endothelial cells of the blood brain barrier, microglia, astrocytes, and neurons in a manner that promotes vascular dysfunction, inflammation, and neurodegeneration. Thrombin is elevated in the AD brain, and thrombin signaling has been linked to both tau and amyloid beta, pathological hallmarks of the disease. In AD mouse models, inhibiting thrombin preserves cognition and endothelial function and reduces neuroinflammation. Evidence linking atrial fibrillation with AD and dementia indicates that anticoagulant therapy may reduce the risk of dementia, with targeting thrombin shown to be particularly effective. It is time for “outside-the-box” thinking about how vascular risk factors, such as atherosclerosis and diabetes, as well as the coagulation and inflammatory pathways interact to promote increased AD risk. In this review, we present evidence that thrombin is a convergence point for AD risk factors and as such that thrombin-based therapeutics could target multiple points of AD pathology, including neurodegeneration, vascular activation, and neuroinflammation. The urgent need for disease-modifying drugs in AD demands new thinking about disease pathogenesis and an exploration of novel drug targets, we propose that thrombin inhibition is an innovative tactic in the therapeutic battle against this devastating disease.
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Affiliation(s)
- Jaclyn Iannucci
- The George and Anne Ryan Institute for Neuroscience, The University of Rhode Island, Kingston, RI, United States.,Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, The University of Rhode Island, Kingston, RI, United States
| | - William Renehan
- The George and Anne Ryan Institute for Neuroscience, The University of Rhode Island, Kingston, RI, United States
| | - Paula Grammas
- The George and Anne Ryan Institute for Neuroscience, The University of Rhode Island, Kingston, RI, United States.,Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, The University of Rhode Island, Kingston, RI, United States
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21
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Ng ACK, Yao M, Cheng SY, Li J, Huang JD, Wu W, Leung GKK, Sun H. Protracted Morphological Changes in the Corticospinal Tract Within the Cervical Spinal Cord After Intracerebral Hemorrhage in the Right Striatum of Mice. Front Neurosci 2020; 14:506. [PMID: 32581678 PMCID: PMC7290159 DOI: 10.3389/fnins.2020.00506] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Accepted: 04/22/2020] [Indexed: 01/20/2023] Open
Abstract
Intracerebral hemorrhage (ICH) is associated with high morbidity and mortality rates. Currently, there is no promising treatment that improves prognosis significantly. While a thorough investigation of the pathological process within the primary site of injury in the brain has been conducted by the research field, the focus was mainly on gray matter injury, which partly accounted for the failure of discovery of clinically efficacious treatments. It is not until recent years that white matter (WM) injury in the brain after subcortical ICH was examined. As WM tracts form networks between different regions, damage to fibers should impair brain connectivity, resulting in functional impairment. Although WM changes have been demonstrated in the brain after ICH, alterations distant from the initial injury site down in the spinal cord are unclear. This longitudinal study, for the first time, revealed prolonged morphological changes of the contralesional dorsal corticospinal tract (CST) in the spinal cord 5 weeks after experimental ICH in mice by confocal microscopy and transmission electron microscopy, implying that the structural integrity of the CST was compromised extensively after ICH. Given the important role of CST in motor function, future translational studies targeting motor recovery should delineate the treatment effects on CST integrity.
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Affiliation(s)
- Anson Cho Kiu Ng
- Department of Surgery, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Min Yao
- Department of Surgery, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,School of Pharmaceutical Sciences, Health Science Centre, Shenzhen University, Shenzhen, China
| | - Stephen Yin Cheng
- Department of Surgery, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Jing Li
- The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Southern Medical University, Guangzhou, China
| | - Jian-Dong Huang
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Wutian Wu
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,GHM Institute of CNS Regeneration, Jinan University, Guangzhou, China.,Re-Stem Biotechnology Co., Ltd., Suzhou, China
| | - Gilberto Ka Kit Leung
- Department of Surgery, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Haitao Sun
- The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Southern Medical University, Guangzhou, China.,School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,Microbiome Medicine Center, Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China
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22
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Mohammadi M, Manaheji H, Maghsoudi N, Danyali S, Baniasadi M, Zaringhalam J. Microglia dependent BDNF and proBDNF can impair spatial memory performance during persistent inflammatory pain. Behav Brain Res 2020; 390:112683. [PMID: 32442548 DOI: 10.1016/j.bbr.2020.112683] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 03/15/2020] [Accepted: 04/27/2020] [Indexed: 12/30/2022]
Abstract
Inflammatory pain is commonly associated with cognitive impairment. However, its molecular mechanisms are poorly understood. Thus, this study was conducted to investigate the molecular mechanisms of behavioral changes associated with inflammatory pain. Briefly, 36 Wistar rats were randomly divided into two main groups: CFA group treated with 100 μL of Complete Freunds' Adjuvant (CFA) and CFA + Minocycline group treated with 100 μL of CFA+40 mg/kg/day of minocycline). After that, each group was divided into three subgroups based on different time points of the study. The pain was induced using CFA and subsequent behavioral changes (i.e., hyperalgesia and learning and spatial memory) were analyzed by the Morris Water Maze (MWM) task and Radiant Heat. Then, the cellular and molecular changes were assessed using Western Blotting, Immunohistochemistry, and Terminal deoxynucleotidyl transferase dUTP Nick End Labeling (TUNEL) techniques. Results of the study indicated that CFA-induced pain impaired spatial learning and memory functions. Studying the cellular changes showed that persistent inflammatory pain increased the microglial activity in CA1 and Dentate Gyrus (DG) regions. Furthermore, an increase was observed in the percentage of TUNEL-positive cells. Also, pro-Brain-Derived Neurotrophic Factor (BDNF)/BDNF ratio, Caspase3, and Receptor-Interacting Protein kinase 3 (RIP3) levels increased in the rats' hippocampus following induction of persistent inflammatory pain. These changes were reversed following the cessation of pain as well as the injection of minocycline. Taking together, the results of the current study for the first time revealed that an increase in the microglia dependent proBDNF/BDNF ratio following persistent inflammatory pain leads to cell death of the CA1 and DG neurons that subsequently causes a cognitive deficit in the learning and spatial memory functions.
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Affiliation(s)
- Mola Mohammadi
- Physiology Department, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Neurophysiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Homa Manaheji
- Physiology Department, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Neurophysiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Nader Maghsoudi
- Department of Biology, Queens College and Graduate Center of the City University of New York, Flushing, NY, USA; Neurobiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Samira Danyali
- Physiology Department, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Neurophysiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mansoureh Baniasadi
- Physiology Department, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Neurophysiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Jalal Zaringhalam
- Physiology Department, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Neurophysiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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23
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Zhou L, Yang F, Yin JW, Gu X, Xu Y, Liang YQ. Compound K induces neurogenesis of neural stem cells in thrombin induced nerve injury through LXRα signaling in mice. Neurosci Lett 2020; 729:135007. [PMID: 32371156 DOI: 10.1016/j.neulet.2020.135007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 04/12/2020] [Accepted: 04/20/2020] [Indexed: 01/17/2023]
Abstract
Intracerebral hemorrhage (ICH) causes neurological function deficit due to the loss of neurons surrounding the hematoma. Increased neurogenesis of endogenous neural stem cells (EnNSCs) is believed to increase cell proliferation and differentiation, thereby improving the neurological deficit. However, there are still limited drugs that are effective for treating neurological deficit. So, the effects of compound K (CK) in EnNSCs were measured after thrombin-induced mice models both in vivo and in vitro, and investigated the probable mechanisms of CK during pro-neurogenesis. The results revealed that 10 μM CK promotes neurogenesis, proliferation and reduces apoptosis of EnNSCs after induction by thrombin. After that, CK treatment increased the neurogenesis of EnNSCs through liver X receptor α (LXRα) signaling pathway using adeno-associated virus knockdown and knocked out mice of LXRα gene. Finally, intraperitoneal injection of 10 mg/kg CK improved the neurogenesis of subventricular zone (SVZ), myelin repair and behavioral deficit after stereotaxic injection of thrombin in the basal ganglia of mice, and this process involved LXRα. These observations provided evidence regarding the effect of CK in pro-neurogenesis via LXRα activation, and suggested further evaluation of it due to its potential role as an effective modulator in the treatment of ICH.
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Affiliation(s)
- Li Zhou
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China; Department of Pharmacy, Yan'an Affiliated Hospital of Kunming Medical University, Kunming, China.
| | - Fan Yang
- Joint Surgery, General Hospital of Tibetan Military Command Lhasa, Lhasa, China
| | - Jie-Wen Yin
- Department of Pharmacy, Yan'an Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Xi Gu
- Department of Pharmacy, Yan'an Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Yue Xu
- Department of Pharmacy, Yan'an Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Yue-Qin Liang
- Department of Pharmacy, Yan'an Affiliated Hospital of Kunming Medical University, Kunming, China.
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24
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Krenzlin H, Gresser E, Jussen D, Riede N, Taylor L, Vogelaar CF, Ringel F, Kempski O, Alessandri B. The Cerebral Thrombin System Is Activated after Intracerebral Hemorrhage and Contributes to Secondary Lesion Growth and Poor Neurological Outcome in C57Bl/6 Mice. J Neurotrauma 2020; 37:1481-1490. [PMID: 31830857 DOI: 10.1089/neu.2019.6582] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
With increasing evidence for the existence of a cerebral thrombin system, coagulation factor IIa (thrombin) is suspected to influence the pathogenesis of secondary injury progression after intracerebral hemorrhage (ICH). We hypothesized that mechanisms associated with local volume expansion after ICH, rather than blood constituents, activate the cerebral thrombin system and are responsible for detrimental neurological outcome. To test this hypothesis, we examine the local thrombin expression after ICH in a C57BL/6N mouse model in the presence and absence of blood constituents. ICH was established using stereotaxic orthotopic injection of utologous blood (n = 10) or silicone oil as inert volume substance (n = 10) into the striatum. Intracranial pressure (ICP), cerebral blood flow (CBF), and mean arterial blood pressure (MAP) were monitored during and 30 min after the procedure. No significant differences between ICP, CBF, and MAP were found between both groups. Prothrombin messenger RNA expression was upregulated early after ICH. Immunohistochemistry showed an increase of perilesional thrombin in both groups (blood, 4.24-fold; silicone, 3.10-fold), whereas prothrombin fragment (F1.2) was elevated only in the absence of whole blood. Thrombin expression is colocalized with neuronal antigen expression. After 24 h, lesion size and neuronal loss were similar. Perihematomal thrombin correlated with increased neuronal loss and detrimental neurological outcome in vivo. In our study, we demonstrate, for the first time, that the local cerebral thrombin system is activated after ICH and that this activation is independent of the presence of whole-blood constituents. In our study, neuronal damage is driven by local thrombin expression and leads to an adverse clinical outcome.
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Affiliation(s)
- Harald Krenzlin
- Institute of Neurosurgical Pathophysiology, Johannes Gutenberg-University Mainz, Mainz, Germany.,Department of Neurosurgery, and Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Eva Gresser
- Institute of Neurosurgical Pathophysiology, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Daniel Jussen
- Institute of Neurosurgical Pathophysiology, Johannes Gutenberg-University Mainz, Mainz, Germany.,Department of Neurosurgery, HELIOS Dr. Horst-Schmidt-Kliniken, Wiesbaden, Germany
| | - Nicole Riede
- Institute of Neurosurgical Pathophysiology, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Louise Taylor
- Institute of Neurosurgical Pathophysiology, Johannes Gutenberg-University Mainz, Mainz, Germany
| | | | - Florian Ringel
- Institute of Neurosurgical Pathophysiology, Johannes Gutenberg-University Mainz, Mainz, Germany.,Department of Neurosurgery, and Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Oliver Kempski
- Institute of Neurosurgical Pathophysiology, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Beat Alessandri
- Institute of Neurosurgical Pathophysiology, Johannes Gutenberg-University Mainz, Mainz, Germany
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Bai Q, Xue M, Yong VW. Microglia and macrophage phenotypes in intracerebral haemorrhage injury: therapeutic opportunities. Brain 2020; 143:1297-1314. [PMID: 31919518 DOI: 10.1093/brain/awz393] [Citation(s) in RCA: 92] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 09/19/2019] [Accepted: 10/20/2019] [Indexed: 01/24/2023] Open
Abstract
Abstract
The prognosis of intracerebral haemorrhage continues to be devastating despite much research into this condition. A prominent feature of intracerebral haemorrhage is neuroinflammation, particularly the excessive representation of pro-inflammatory CNS-intrinsic microglia and monocyte-derived macrophages that infiltrate from the circulation. The pro-inflammatory microglia/macrophages produce injury-enhancing factors, including inflammatory cytokines, matrix metalloproteinases and reactive oxygen species. Conversely, the regulatory microglia/macrophages with potential reparative and anti-inflammatory roles are outcompeted in the early stages after intracerebral haemorrhage, and their beneficial roles appear to be overwhelmed by pro-inflammatory microglia/macrophages. In this review, we describe the activation of microglia/macrophages following intracerebral haemorrhage in animal models and clinical subjects, and consider their multiple mechanisms of cellular injury after haemorrhage. We review strategies and medications aimed at suppressing the pro-inflammatory activities of microglia/macrophages, and those directed at elevating the regulatory properties of these myeloid cells after intracerebral haemorrhage. We consider the translational potential of these medications from preclinical models to clinical use after intracerebral haemorrhage injury, and suggest that several approaches still lack the experimental support necessary for use in humans. Nonetheless, the preclinical data support the use of deactivator or inhibitor of pro-inflammatory microglia/macrophages, whilst enhancing the regulatory phenotype, as part of the therapeutic approach to improve the prognosis of intracerebral haemorrhage.
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Affiliation(s)
- Qian Bai
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Department of Anesthesiology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, Zhengzhou, Henan, China
| | - Mengzhou Xue
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, Zhengzhou, Henan, China
| | - V Wee Yong
- Hotchkiss Brain Institute and Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
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Cai Z, Hu X, Tan R, Feng Y, Sun M, Ma N, Li X, Huang L, An J, Ge Q, Lu H. Neuroprotective effect of green tea extractives against oxidative stress by enhancing the survival and proliferation of PC12 cells. Mol Cell Toxicol 2019. [DOI: 10.1007/s13273-019-0042-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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27
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Yang Z, Liu Q, Shi H, Jiang X, Wang S, Lu Y, Zhang J, Huang X, Yu A. Interleukin 17A exacerbates ER-stress-mediated inflammation of macrophages following ICH. Mol Immunol 2018; 101:38-45. [DOI: 10.1016/j.molimm.2018.05.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 05/22/2018] [Accepted: 05/23/2018] [Indexed: 12/22/2022]
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Tchessalova D, Posillico CK, Tronson NC. Neuroimmune Activation Drives Multiple Brain States. Front Syst Neurosci 2018; 12:39. [PMID: 30210310 PMCID: PMC6123349 DOI: 10.3389/fnsys.2018.00039] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 08/07/2018] [Indexed: 12/11/2022] Open
Abstract
Neuroimmune signaling is increasingly identified as a critical component of neuronal processes underlying memory, emotion and cognition. The interactions of microglia and astrocytes with neurons and synapses, and the individual cytokines and immune signaling molecules that mediate these interactions are a current focus of much research. Here, we discuss neuroimmune activation as a mechanism triggering different states that modulate cognitive and affective processes to allow for appropriate behavior during and after illness or injury. We propose that these states lie on a continuum from a naïve homeostatic baseline state in the absence of stimulation, to acute neuroimmune activity and chronic activation. Importantly, consequences of illness or injury including cognitive deficits and mood impairments can persist long after resolution of immune signaling. This suggests that neuroimmune activation also results in an enduring shift in the homeostatic baseline state with long lasting consequences for neural function and behavior. Such different states can be identified in a multidimensional way, using patterns of cytokine and glial activation, behavioral and cognitive changes, and epigenetic signatures. Identifying distinct neuroimmune states and their consequences for neural function will provide a framework for predicting vulnerability to disorders of memory, cognition and emotion both during and long after recovery from illness.
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Affiliation(s)
- Daria Tchessalova
- Neuroscience Graduate Program, School of Medicine, University of Michigan, Ann Arbor, MI, United States
| | | | - Natalie Celia Tronson
- Neuroscience Graduate Program, School of Medicine, University of Michigan, Ann Arbor, MI, United States.,Department of Psychology, University of Michigan, Ann Arbor, MI, United States
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Green Tea and Red Tea from Camellia sinensis Partially Prevented the Motor Deficits and Striatal Oxidative Damage Induced by Hemorrhagic Stroke in Rats. Neural Plast 2018; 2018:5158724. [PMID: 30174686 PMCID: PMC6098885 DOI: 10.1155/2018/5158724] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 06/17/2018] [Accepted: 07/16/2018] [Indexed: 12/27/2022] Open
Abstract
Green tea from Camellia sinensis plays a well-established neuroprotective role in several neurodegenerative diseases, including intracerebral hemorrhage (ICH). However, the other teas of the same plant do not have their properties well understood; but they can be as effective as green tea as an alternative therapy. In this study, we investigated the effects of supplementation with green tea and red tea from Camellia sinensis on motor deficits and striatum oxidative damage in rats submitted to hemorrhagic stroke (ICH). Male Wistar rats were supplemented with green tea, red tea, or vehicle for 10 days prior to ICH induction. After injury, the rats were submitted to motor tests (open field for locomotion, rotarod for balance, and neurological deficit scale (NDS)) 1, 3, and 7 days after ICH induction, while the tea supplementation was maintained. Subsequently, the rats were euthanized to striatal tissue dissection for biochemical analyzes (lipid peroxidation, reactive oxygen species, glutathione levels, and total antioxidant capacity). ICH caused locomotor and balance deficits, as well as increased the neurological deficit (NDS). Only red tea prevented locomotor deficits after injury. Green tea and red tea prevented balance deficits on the seventh day after ICH. On NDS evaluation, green tea presented a better neuroprotection than red tea (until day 3 after ICH injury). In addition, ICH increased reactive oxygen species and lipid peroxidation levels, without altering antioxidant markers. Green and red teas were effective in decreasing the lipid peroxidation levels. Therefore, green and red teas partially prevented the motor deficits and striatal oxidative damage induced by ICH. Based on our results, we can consider that the two teas seem to be equally effective to prevent motor deficits and striatal oxidative damage induced by hemorrhagic stroke in rats.
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Kumar A, Rani A, Scheinert RB, Ormerod BK, Foster TC. Nonsteroidal anti-inflammatory drug, indomethacin improves spatial memory and NMDA receptor function in aged animals. Neurobiol Aging 2018; 70:184-193. [PMID: 30031231 DOI: 10.1016/j.neurobiolaging.2018.06.026] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 06/04/2018] [Accepted: 06/19/2018] [Indexed: 11/17/2022]
Abstract
A redox-mediated decrease in N-methyl-D-aspartate (NMDA) receptor function contributes to psychiatric diseases and impaired cognition during aging. Inflammation provides a potential source of reactive oxygen species for inducing NMDA receptor hypofunction. The present study tested the hypothesis that the nonsteroidal anti-inflammatory drug indomethacin, which improves spatial episodic memory in aging rats, would enhance NMDA receptor function through a shift in the redox state. Male F344 young and aged rats were prescreened using a 1-day version of the water maze task. Animals were then treated with the indomethacin or vehicle, delivered in a frozen milk treat (orally, twice per day, 18 days), and retested on the water maze. Indomethacin treatment enhanced water maze performance. Hippocampal slices were prepared for examination of CA3-CA1 synaptic responses, long-term potentiation, and NMDA receptor-mediated synaptic responses. No effect of treatment was observed for the total synaptic response. Long-term potentiation magnitude and NMDA receptor input-output curves were enhanced for aged indomethacin-treated animals. To examine redox regulation of NMDA receptors, a second group of aged animals was treated with indomethacin or vehicle, and the effect of the reducing agent, dithiothreitol ([DTT], 0.5 mM) on NMDA receptor-mediated synaptic responses was evaluated. As expected, DTT increased the NMDA receptor response and the effect of DTT was reduced by indomethacin treatment. The results indicate that indomethacin acted to diminish the age-related and redox-mediated NMDA receptor hypofunction and suggest that inflammation contributes to cognitive impairment through an increase in redox stress.
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Affiliation(s)
- Ashok Kumar
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL, USA.
| | - Asha Rani
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL, USA
| | - Rachel B Scheinert
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL, USA; Department of Biomedical Engineering, J. Crayton Pruitt Family, University of Florida, Gainesville, FL, USA
| | - Brandi K Ormerod
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL, USA; Department of Biomedical Engineering, J. Crayton Pruitt Family, University of Florida, Gainesville, FL, USA
| | - Thomas C Foster
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL, USA.
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Hain EG, Sparenberg M, Rasińska J, Klein C, Akyüz L, Steiner B. Indomethacin promotes survival of new neurons in the adult murine hippocampus accompanied by anti-inflammatory effects following MPTP-induced dopamine depletion. J Neuroinflammation 2018; 15:162. [PMID: 29803225 PMCID: PMC5970532 DOI: 10.1186/s12974-018-1179-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 04/25/2018] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Parkinson's disease (PD) is characterized by dopaminergic cell loss and inflammation in the substantia nigra (SN) leading to motor deficits but also to hippocampus-associated non-motor symptoms such as spatial learning and memory deficits. The cognitive decline is correlated with impaired adult hippocampal neurogenesis resulting from dopamine deficit and inflammation, represented in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine hydrochloride (MPTP) mouse model of PD. In the inflammatory tissue, cyclooxygenase (COX) is upregulated leading to an ongoing inflammatory process such as prostaglandin-mediated increased cytokine levels. Therefore, inhibition of COX by indomethacin may prevent the inflammatory response and the impairment of adult hippocampal neurogenesis. METHODS Wildtype C57Bl/6 and transgenic Nestin-GFP mice were treated with MPTP followed by short-term or long-term indomethacin treatment. Then, aspects of inflammation and neurogenesis were evaluated by cell counts using immunofluorescence and immunohistochemical stainings in the SN and dentate gyrus (DG). Furthermore, hippocampal mRNA expression of neurogenesis-related genes of the Notch, Wnt, and sonic hedgehog signaling pathways and neurogenic factors were assessed, and protein levels of serum cytokines were measured. RESULTS Indomethacin restored the reduction of the survival rate of new mature neurons and reduced the amount of amoeboid CD68+ cells in the DG after MPTP treatment. Indomethacin downregulated genes of the Wnt and Notch signaling pathways and increased neuroD6 expression. In the SN, indomethacin reduced the pro-inflammatory cellular response without reversing dopaminergic cell loss. CONCLUSION Indomethacin has a pro-neurogenic and thereby restorative effect and an anti-inflammatory effect on the cellular level in the DG following MPTP treatment. Therefore, COX inhibitors such as indomethacin may represent a therapeutic option to restore adult neurogenesis in PD.
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Affiliation(s)
- Elisabeth G Hain
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt - Universität zu Berlin and Berlin Institute of Health, Department of Neurology with Experimental Neurology, Charitéplatz 1, 10117, Berlin, Germany.
| | - Maria Sparenberg
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt - Universität zu Berlin and Berlin Institute of Health, Department of Neurology with Experimental Neurology, Charitéplatz 1, 10117, Berlin, Germany
| | - Justyna Rasińska
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt - Universität zu Berlin and Berlin Institute of Health, Department of Neurology with Experimental Neurology, Charitéplatz 1, 10117, Berlin, Germany
| | - Charlotte Klein
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt - Universität zu Berlin and Berlin Institute of Health, Department of Neurology with Experimental Neurology, Charitéplatz 1, 10117, Berlin, Germany
| | - Levent Akyüz
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt - Universität zu Berlin, and Berlin Institute of Health, Institute for Medical Immunology, Augustenburger Platz 1, 13353, Berlin, Germany.,Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt - Universität zu Berlin, and Berlin Institute of Health, Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Augustenburger Platz 1, 13353, Berlin, Germany
| | - Barbara Steiner
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt - Universität zu Berlin and Berlin Institute of Health, Department of Neurology with Experimental Neurology, Charitéplatz 1, 10117, Berlin, Germany
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TRPM2 Channel Aggravates CNS Inflammation and Cognitive Impairment via Activation of Microglia in Chronic Cerebral Hypoperfusion. J Neurosci 2018; 38:3520-3533. [PMID: 29507145 DOI: 10.1523/jneurosci.2451-17.2018] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Revised: 01/25/2018] [Accepted: 02/12/2018] [Indexed: 01/05/2023] Open
Abstract
Chronic cerebral hypoperfusion is a characteristic seen in widespread CNS diseases, including neurodegenerative and mental disorders, and is commonly accompanied by cognitive impairment. Recently, several studies demonstrated that chronic cerebral hypoperfusion can induce the excessive inflammatory responses that precede neuronal dysfunction; however, the precise mechanism of cognitive impairment due to chronic cerebral hypoperfusion remains unknown. Transient receptor potential melastatin 2 (TRPM2) is a Ca2+-permeable channel that is abundantly expressed in immune cells and is involved in aggravation of inflammatory responses. Therefore, we investigated the pathophysiological role of TRPM2 in a mouse chronic cerebral hypoperfusion model with bilateral common carotid artery stenosis (BCAS). When male mice were subjected to BCAS, cognitive dysfunction and white matter injury at day 28 were significantly improved in TRPM2 knock-out (TRPM2-KO) mice compared with wild-type (WT) mice, whereas hippocampal damage was not observed. There were no differences in blood-brain barrier breakdown and H2O2 production between the two genotypes at 14 and 28 d after BCAS. Cytokine production was significantly suppressed in BCAS-operated TRPM2-KO mice compared with WT mice at day 28. In addition, the number of Iba1-positive cells gradually decreased from day 14. Moreover, daily treatment with minocycline significantly improved cognitive perturbation. Surgical techniques using bone marrow chimeric mice revealed that activated Iba1-positive cells in white matter could be brain-resident microglia, not peripheral macrophages. Together, these findings suggest that microglia contribute to the aggravation of cognitive impairment by chronic cerebral hypoperfusion, and that TRPM2 may be a potential target for chronic cerebral hypoperfusion-related disorders.SIGNIFICANCE STATEMENT Chronic cerebral hypoperfusion is manifested in a wide variety of CNS diseases, including neurodegenerative and mental disorders that are accompanied by cognitive impairment; however, the underlying mechanisms require clarification. Here, we used a chronic cerebral hypoperfusion mouse model to investigate whether TRPM2, a Ca2+-permeable cation channel highly expressed in immune cells, plays a destructive role in the development of chronic cerebral hypoperfusion-induced cognitive impairment, and propose a new hypothesis in which TRPM2-mediated activation of microglia, not macrophages, specifically contributes to the pathology through the aggravation of inflammatory responses. These findings shed light on the understanding of the mechanisms of chronic cerebral hypoperfusion-related inflammation, and are expected to provide a novel therapeutic molecule for cognitive impairment in CNS diseases.
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Nam SM, Kim JW, Yoo DY, Jung HY, Chung JY, Kim DW, Hwang IK, Yoon YS. Hypothyroidism increases cyclooxygenase-2 levels and pro-inflammatory response and decreases cell proliferation and neuroblast differentiation in the hippocampus. Mol Med Rep 2018; 17:5782-5788. [PMID: 29436670 PMCID: PMC5866021 DOI: 10.3892/mmr.2018.8605] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 02/23/2017] [Indexed: 01/24/2023] Open
Abstract
The present study investigated the effects of hypothyroidism on cyclooxygenase-2 (COX-2) and pro‑inflammatory cytokines in the dentate gyrus to elucidate the roles of COX‑2 in the hypothyroid hippocampus. Hypothyroidism was induced in rats by treating with 0.03% 2‑mercapto‑1‑methyl‑imidazole dissolved in drinking water for 5 weeks. The animals were sacrificed at 12 weeks of age. Hypothyroidism rats exhibited decreased triiodothyronine and thyroxine levels in the serum, while the levels of thyroid‑stimulating hormone and the weight of thyroid glands were significantly higher in the hypothyroid rats compared with those in the vehicle‑treated group. COX‑2 immunoreactivity was significantly increased in the hippocampal CA2/3 region and the dentate gyrus compared with the vehicle‑treated group. Levels of pro‑inflammatory cytokines including interleukin (IL)‑1β, IL‑6 and tumor necrosis factor‑α were significantly higher in the hippocampal homogenates of hypothyroid rats. Cell proliferation and neuroblast differentiation based on Ki67 and doublecortin immunohistochemistry were decreased in the dentate gyrus of hypothyroid rats compared with those in the vehicle‑treated group. These results suggested that hypothyroidism‑mediated COX‑2 expression affected hippocampal plasticity by upregulating the levels of pro‑inflammatory cytokines in the hippocampus. Therefore, COX‑2 may be suggested as a candidate molecule for preventing hypothyroidism‑induced neurological side effects.
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Affiliation(s)
- Sung Min Nam
- Department of Anatomy and Cell Biology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Jong Whi Kim
- Department of Anatomy and Cell Biology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Dae Young Yoo
- Department of Anatomy and Cell Biology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyo Young Jung
- Department of Anatomy and Cell Biology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Jin Young Chung
- Department of Veterinary Internal Medicine and Geriatrics, College of Veterinary Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Dae Won Kim
- Department of Biochemistry and Molecular Biology, Research Institute of Oral Sciences, College of Dentistry, Gangneung‑Wonju National University, Gangneung, Gangwon 25457, Republic of Korea
| | - In Koo Hwang
- Department of Anatomy and Cell Biology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Yeo Sung Yoon
- Department of Anatomy and Cell Biology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Republic of Korea
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Duan HQ, Wu QL, Yao X, Fan BY, Shi HY, Zhao CX, Zhang Y, Li B, Sun C, Kong XH, Zhou XF, Feng SQ. Nafamostat mesilate attenuates inflammation and apoptosis and promotes locomotor recovery after spinal cord injury. CNS Neurosci Ther 2018; 24:429-438. [PMID: 29352519 DOI: 10.1111/cns.12801] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 12/18/2017] [Accepted: 12/21/2017] [Indexed: 12/23/2022] Open
Abstract
AIM Spinal cord injury (SCI) leads to severe neural damage for which there is currently no effective treatment. Exploration of the neuroprotective effect among clinically approved drugs will speed up clinical translation of SCI. Nafamostat mesilate (NM) as a synthetic serine protease inhibitor has been used clinically in pancreatitis treatments. However, its effectiveness in SCI is unknown. The aim of this study was to confirm the efficacy of NM in ameliorating SCI. METHODS Intraperitoneal administration of NM was performed on a contusion SCI model in Wistar rat. Hematoxylin and eosin staining (H&E staining) and Luxol fast blue (LFB) staining were used to observe the histological lesions. Apoptosis was examined by TUNEL staining, Annexin V-FITC/PI, caspase-3, and Bcl-2. Cytokines and neurotrophins were tested by Western blot. Locomotion recovery assessed by hindlimb BBB score and the inclined plane test. RESULTS Nafamostat mesilate treatment significantly improved locomotion recovery as assessed by hindlimb BBB scores and the inclined plane test. H&E staining and LFB staining showed a significant increase in spared tissue in both gray matter and white matter. NM decreased the expression of the proinflammatory cytokines TNF-α and IL-6. In addition, apoptosis was also significantly decreased, as shown by TUNEL staining and Annexin V-FITC/PI and by Western blotting for caspase-3 and Bcl-2 expression. Due to the mechanism of action of NM as a serine protease inhibitor, the drug decreased thrombin expression in the damaged spinal cord. Furthermore, NM increased the expression of neurotrophins (NT-3, BDNF, and NGF). CONCLUSIONS Upon NM treatment, the functional and histological outcomes were improved, and microenvironment upon SCI was modulated. As a clinically approved drug, NM holds promise for clinical use after spinal cord injury.
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Affiliation(s)
- Hui-Quan Duan
- Department of Orthopaedics, National Spinal Cord Injury International Cooperation Base, Tianjin Medical University General Hospital, Tianjin, China
| | - Qiu-Li Wu
- Department of Orthopaedics, National Spinal Cord Injury International Cooperation Base, Tianjin Medical University General Hospital, Tianjin, China
| | - Xue Yao
- Department of Orthopaedics, National Spinal Cord Injury International Cooperation Base, Tianjin Medical University General Hospital, Tianjin, China
| | - Bao-You Fan
- Department of Orthopaedics, National Spinal Cord Injury International Cooperation Base, Tianjin Medical University General Hospital, Tianjin, China
| | - Hong-Yu Shi
- Department of Orthopaedics, National Spinal Cord Injury International Cooperation Base, Tianjin Medical University General Hospital, Tianjin, China
| | - Chen-Xi Zhao
- Department of Orthopaedics, National Spinal Cord Injury International Cooperation Base, Tianjin Medical University General Hospital, Tianjin, China
| | - Yan Zhang
- Department of Orthopaedics, National Spinal Cord Injury International Cooperation Base, Tianjin Medical University General Hospital, Tianjin, China
| | - Bo Li
- Department of Orthopaedics, National Spinal Cord Injury International Cooperation Base, Tianjin Medical University General Hospital, Tianjin, China
| | - Chao Sun
- Department of Orthopaedics, National Spinal Cord Injury International Cooperation Base, Tianjin Medical University General Hospital, Tianjin, China
| | | | - Xin-Fu Zhou
- School of Pharmacology and Medical Sciences, University of South Australia, Adelaide, SA, Australia
| | - Shi-Qing Feng
- Department of Orthopaedics, National Spinal Cord Injury International Cooperation Base, Tianjin Medical University General Hospital, Tianjin, China
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Hemoglobin enhances miRNA-144 expression and autophagic activation mediated inflammation of microglia via mTOR pathway. Sci Rep 2017; 7:11861. [PMID: 28928406 PMCID: PMC5605685 DOI: 10.1038/s41598-017-12067-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 09/04/2017] [Indexed: 01/20/2023] Open
Abstract
Intracerebral hemorrhage promotes autophagic activation of microglia and enhances neuroinflammation. MiRNAs are key factors to autophagy, contributed to negatively and posttranscriptionally regulate gene expression and function. However, the specific miRNAs involved in the intracerebral hemorrhage mediated microglia autophagic activation are unidentified. In this experiment, microglia was treated with hemoglobin. And then, miRNA-144 expression, autophagic activation and inflammation of microglia were detected. In addition, the mTOR target of miRNA-144 and its regulation were identified. Our data demonstrated that hemoglobin promoted miRNA-144 expression and autophagic activation mediated inflammation. Additionally, miRNA-144 targeted mTOR by directly interacting with the 3' untranslated regions (UTRs), mutations of the binding sites abolish the miRNA-144 responsiveness. Overexpression of mTOR decreased autophagic activation and inflammation of microglia. Therefore, our results suggested that miRNA-144 contributed to hemoglobin mediated autophagic activation and inflammation of microglia via mTOR pathway. And miRNA based treatment provided novel therapeutical strategy for intracerebral hemorrhage.
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Lan X, Han X, Li Q, Yang QW, Wang J. Modulators of microglial activation and polarization after intracerebral haemorrhage. Nat Rev Neurol 2017; 13:420-433. [PMID: 28524175 PMCID: PMC5575938 DOI: 10.1038/nrneurol.2017.69] [Citation(s) in RCA: 548] [Impact Index Per Article: 78.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Intracerebral haemorrhage (ICH) is the most lethal subtype of stroke but currently lacks effective treatment. Microglia are among the first non-neuronal cells on the scene during the innate immune response to ICH. Microglia respond to acute brain injury by becoming activated and developing classic M1-like (proinflammatory) or alternative M2-like (anti-inflammatory) phenotypes. This polarization implies as yet unrecognized actions of microglia in ICH pathology and recovery, perhaps involving microglial production of proinflammatory or anti-inflammatory cytokines and chemokines. Furthermore, alternatively activated M2-like microglia might promote phagocytosis of red blood cells and tissue debris, a major contribution to haematoma clearance. Interactions between microglia and other cells modulate microglial activation and function, and are also important in ICH pathology. This Review summarizes key studies on modulators of microglial activation and polarization after ICH, including M1-like and M2-like microglial phenotype markers, transcription factors and key signalling pathways. Microglial phagocytosis, haematoma resolution, and the potential crosstalk between microglia and T lymphocytes, neurons, astrocytes, and oligodendrocytes in the ICH brain are described. Finally, the clinical and translational implications of microglial polarization in ICH are presented, including the evidence that therapeutic approaches aimed at modulating microglial function might mitigate ICH injury and improve brain repair.
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Affiliation(s)
- Xi Lan
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Ross Building 370B, Baltimore, Maryland 21205, USA
| | - Xiaoning Han
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Ross Building 370B, Baltimore, Maryland 21205, USA
| | - Qian Li
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Ross Building 370B, Baltimore, Maryland 21205, USA
| | - Qing-Wu Yang
- Department of Neurology, Xinqiao Hospital, Third Military Medical University, 183 Xinqiao Main Street, Shapingba District, Chongqing 400037, China
| | - Jian Wang
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Ross Building 370B, Baltimore, Maryland 21205, USA
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Short-term green tea supplementation prevents recognition memory deficits and ameliorates hippocampal oxidative stress induced by different stroke models in rats. Brain Res Bull 2017; 131:78-84. [DOI: 10.1016/j.brainresbull.2017.03.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 03/16/2017] [Accepted: 03/17/2017] [Indexed: 12/31/2022]
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Jussen D, Krenzlin H, Papaioannou C, Ens S, Kempski O, Alessandri B. Blood Aggravates Histological and Functional Damage after Acute Subdural Hematoma in Rats. J Neurotrauma 2017; 34:906-913. [DOI: 10.1089/neu.2016.4464] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Daniel Jussen
- Department Of Neurosurgery, HELIOS Dr. Horst Schmidt Kliniken, Wiesbaden, Germany
- Institute for Neurosurgical Pathophysiology, University Medical Centre Mainz, Germany
| | - Harald Krenzlin
- Department Of Neurosurgery, HELIOS Dr. Horst Schmidt Kliniken, Wiesbaden, Germany
- Institute for Neurosurgical Pathophysiology, University Medical Centre Mainz, Germany
| | | | - Swetlana Ens
- Institute for Neurosurgical Pathophysiology, University Medical Centre Mainz, Germany
| | - Oliver Kempski
- Institute for Neurosurgical Pathophysiology, University Medical Centre Mainz, Germany
| | - Beat Alessandri
- Institute for Neurosurgical Pathophysiology, University Medical Centre Mainz, Germany
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Xiao Yao San against Corticosterone-Induced Stress Injury via Upregulating Glucocorticoid Receptor Reaction Element Transcriptional Activity. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 2016:5850739. [PMID: 27822288 PMCID: PMC5086362 DOI: 10.1155/2016/5850739] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 06/28/2016] [Accepted: 09/04/2016] [Indexed: 11/18/2022]
Abstract
Previous studies have revealed that uncontrollable stress can impair the synaptic plasticity and firing property of hippocampal neurons, which influenced various hippocampal-dependent tasks including memory, cognition, behavior, and mood. In this work, we had investigated the effects and mechanisms of the Chinese herbal medicine Xiao Yao San (XYS) against corticosterone-induced stress injury in primary hippocampal neurons (PHN) cells. We found that XYS and RU38486 could increase cell viabilities and decrease cell apoptosis by MTT, immunofluorescence, and flow cytometry assays. In addition, we observed that XYS notably inhibited the nuclear translocation of GR and upregulated the mRNA and protein expressions levels of Caveolin-1, GR, BDNF, TrkB, and FKBP4. However, XYS downregulated the FKBP51 expressions. Furthermore, the results of the electrophoretic mobility shift assay (EMSA) and double luciferase reporter gene detection indicated that FKBP4 promotes the transcriptional activity of GR reaction element (GRE) by binding with GR, and FKBP51 processed the opposite action. The in vivo experiment also proved the functions of XYS. These results suggested that XYS showed an efficient neuroprotection against corticosterone-induced stress injury in PHN cells by upregulating GRE transcriptional activity, which should be developed as a potential candidate for treating stress injury in the future.
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Guan J, Zhang S, Zhou Q, Yuan Z, Lu Z. Effect of thrombin preconditioning on migration of subventricular zone-derived cells after intracerebral hemorrhage in rats. Neurol Res 2016; 38:809-16. [PMID: 27477964 DOI: 10.1080/01616412.2016.1210356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
OBJECTIVE To investigate the effect of thrombin preconditioning (TPC) on the intracerebral hemorrhage (ICH)-induced proliferation, migration, and function of subventriclular zone (SVZ) cells and to find new strategies that enhance endogenous neurogenesis after ICH. METHODS Male Sprague-Dawley rats were randomly divided into 3 groups (ICH, TPC, and control group). Rats of each group were randomly divided into 5 subgroups (3-d, 7-d, 14-d, 21-d, and 28-d subgroup). ICH was caused by intrastrial stereotactic administration of collagenase type IV. Brdu was used to label newborn SVZ cells. Organotypic brain slices were cultured to dynamically observe the migration of SVZ cells at living brain tissue. Migration of Dil-labeled SVZ cells in living brain slices was traced by time-lapse microscopy. To assess whether SVZ cells migrating to injured striatum had the ability to form synapses with other cells, brain slices from each group were double immunolabeled with Brdu and synapsin I. RESULTS The number of Brdu-positive cells markedly increased in the ipsilateral SVZ and striatum 3 days after TPC, peaked at 14 days (P < 0.01), continued to 21 days, and then gradually decreased at 28 days with significant difference compared to the ICH group at each time point (P < 0.01). Migration of Dil-labeled SVZ cells in brain slices in each group was observed and imaged during a 12-h period. Dil-labeled SVZ cells in the TPC group were observed to migrate laterally toward striatum with time with a faster velocity compared to the ICH group (P < 0.01). Our study also demonstrated that TPC induced strong colocalization of Brdu and synapsin I in the ipsilateral striatum between 3 and 28 days after injury.TPC made colocalization of Brdu and synapsin I appear earlier and continue for a longer time compared to the ICH group. CONCLUSIONS Our results demonstrated that TPC could promote proliferation, migration, and function of SVZ cells after ICH, which may provide a new idea for enhancing endogenous neurogenesis and developing new therapeutic strategies against ICH-induced brain injury.
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Affiliation(s)
- Jingxia Guan
- a Department of Neurology , Renmin Hospital of Wuhan University , Wuhan , China
| | - Shaofeng Zhang
- a Department of Neurology , Renmin Hospital of Wuhan University , Wuhan , China
| | - Qin Zhou
- a Department of Neurology , Renmin Hospital of Wuhan University , Wuhan , China
| | - Zhenhua Yuan
- a Department of Neurology , Renmin Hospital of Wuhan University , Wuhan , China
| | - Zuneng Lu
- a Department of Neurology , Renmin Hospital of Wuhan University , Wuhan , China
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Marangoni MN, Braun D, Situ A, Moyano AL, Kalinin S, Polak P, Givogri MI, Feinstein DL. Differential effects on glial activation by a direct versus an indirect thrombin inhibitor. J Neuroimmunol 2016; 297:159-68. [PMID: 27397090 DOI: 10.1016/j.jneuroim.2016.05.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 04/13/2016] [Accepted: 05/22/2016] [Indexed: 12/21/2022]
Abstract
Thrombin is a potent regulator of brain function in health and disease, modulating glial activation and brain inflammation. Thrombin inhibitors, several of which are in clinical use as anti-coagulants, can reduce thrombin-dependent neuroinflammation in pathological conditions. However, their effects in a healthy CNS are largely unknown. In adult healthy mice, we compared the effects of treatment by the direct thrombin inhibitor dabigatran etexilate (DE), to those of warfarin, which acts by preventing vitamin K recycling essential for coagulation. After 4weeks, warfarin increased both astrocyte GFAP and microglia Iba-1 staining throughout the CNS; whereas DE reduced expression of both markers. Warfarin, but not DE, reduced sulfatide levels; and warfarin showed longer lasting changes in cerebellar gene expression. DE also reduced glial activation in a mouse model of Alzheimer's disease, although no changes in amyloid plaque burden were observed. These results suggest that treatment with direct thrombin inhibitors may be preferable to those agents which reduce vitamin K levels and have the potential to increase glial activation.
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Affiliation(s)
- M Natalia Marangoni
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - David Braun
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Annie Situ
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Ana L Moyano
- Department of Anatomy and Cell Biology, University of Illinois, Chicago, IL 60612, United States
| | - Sergey Kalinin
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Paul Polak
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Maria I Givogri
- Department of Anatomy and Cell Biology, University of Illinois, Chicago, IL 60612, United States
| | - Douglas L Feinstein
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612, United States; Department of Veterans Affairs, Jesse Brown VA Medical Center, Chicago, IL 60612, United States.
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