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Ghosh M, Lee J, Burke AN, Strong TA, Sagen J, Pearse DD. Sex Dependent Disparities in the Central Innate Immune Response after Moderate Spinal Cord Contusion in Rat. Cells 2024; 13:645. [PMID: 38607084 PMCID: PMC11011714 DOI: 10.3390/cells13070645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/12/2024] [Accepted: 03/29/2024] [Indexed: 04/13/2024] Open
Abstract
Subacute spinal cord injury (SCI) displays a complex pathophysiology associated with pro-inflammation and ensuing tissue damage. Microglia, the resident innate immune cells of the CNS, in concert with infiltrating macrophages, are the primary contributors to SCI-induced inflammation. However, subpopulations of activated microglia can also possess immunomodulatory activities that are essential for tissue remodeling and repair, including the production of anti-inflammatory cytokines and growth factors that are vital for SCI recovery. Recently, reports have provided convincing evidence that sex-dependent differences exist in how microglia function during CNS pathologies and the extent to which these cells contribute to neurorepair and endogenous recovery. Herein we employed flow cytometry and immunohistochemical methods to characterize the phenotype and population dynamics of activated innate immune cells within the injured spinal cord of age-matched male and female rats within the first week (7 days) following thoracic SCI contusion. This assessment included the analysis of pro- and anti-inflammatory markers, as well as the expression of critical immunomodulatory kinases, including P38 MAPK, and transcription factors, such as NFκB, which play pivotal roles in injury-induced inflammation. We demonstrate that activated microglia from the injured spinal cord of female rats exhibited a significantly diminutive pro-inflammatory response, but enhanced anti-inflammatory activity compared to males. These changes included lower levels of iNOS and TLR4 expression but increased levels of ARG-1 and CD68 in females after SCI. The altered expression of these markers is indicative of a disparate secretome between the microglia of males and females after SCI and that the female microglia possesses higher phagocytic capabilities (increased CD68). The examination of immunoregulatory kinases and transcription factors revealed that female microglia had higher levels of phosphorylated P38Thr180/Tyr182 MAPK and nuclear NFκB pp50Ser337 but lower amounts of nuclear NFκB pp65Ser536, suggestive of an attenuated pro-inflammatory phenotype in females compared to males after SCI. Collectively, this work provides novel insight into some of the sex disparities that exist in the innate immune response after SCI and indicates that sex is an important variable when designing and testing new therapeutic interventions or interpretating positive or negative responses to an intervention.
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Affiliation(s)
- Mousumi Ghosh
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (J.L.); (A.N.B.); (T.A.S.); (J.S.); (D.D.P.)
- The Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Veterans Affairs, Veterans Affairs Medical Center, Miami, FL 33136, USA
| | - Jinyoung Lee
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (J.L.); (A.N.B.); (T.A.S.); (J.S.); (D.D.P.)
| | - Ashley N. Burke
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (J.L.); (A.N.B.); (T.A.S.); (J.S.); (D.D.P.)
| | - Thomas A. Strong
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (J.L.); (A.N.B.); (T.A.S.); (J.S.); (D.D.P.)
| | - Jacqueline Sagen
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (J.L.); (A.N.B.); (T.A.S.); (J.S.); (D.D.P.)
- The Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- The Neuroscience Program, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Damien D. Pearse
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (J.L.); (A.N.B.); (T.A.S.); (J.S.); (D.D.P.)
- The Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Veterans Affairs, Veterans Affairs Medical Center, Miami, FL 33136, USA
- The Neuroscience Program, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- The Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
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2
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Pradhyumnan H, Perez GG, Patel SH, Blaya MO, Bramlett HM, Raval AP. A Perspective on Hormonal Contraception Usage in Central Nervous System Injury. J Neurotrauma 2024; 41:541-551. [PMID: 37975282 DOI: 10.1089/neu.2023.0219] [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] [Indexed: 11/19/2023] Open
Abstract
Naturally occurring life stages in women are associated with changes in the milieu of endogenous ovarian hormones. Women of childbearing age may be exposed to exogenous ovarian hormone(s) because of their use of varying combinations of estrogen and progesterone hormones-containing oral contraceptives (OC; also known as "the pill"). If women have central nervous system (CNS) injury such as spinal cord injury (SCI) and traumatic brain injury (TBI) during their childbearing age, they are likely to retain their reproductive capabilities and may use OC. Many deleterious side effects of long-term OC use have been reported, such as aberrant blood clotting and endothelial dysfunction that consequently increase the risk of myocardial infarction, venous thromboembolism, and ischemic brain injury. Although controversial, studies have suggested that OC use is associated with neuropsychiatric ramifications, including uncontrollable mood swings and poorer cognitive performance. Our understanding about how the combination of endogenous hormones and OC-conferred exogenous hormones affect outcomes after CNS injuries remains limited. Therefore, understanding the impact of OC use on CNS injury outcomes needs further investigation to reveal underlying mechanisms, promote reporting in clinical or epidemiological studies, and raise awareness of possible compounded consequences. The goal of the current review is to discuss the impacts of CNS injury on endogenous ovarian hormones and vice-versa, as well as the putative consequences of exogenous ovarian hormones (OC) on the CNS to identify potential gaps in our knowledge to consider for future laboratory, epidemiological, and clinical studies.
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Affiliation(s)
- Hari Pradhyumnan
- Peritz Scheinberg Cerebral Vascular Disease Research Laboratory (CVDRL), Department of Neurology, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Gina G Perez
- Peritz Scheinberg Cerebral Vascular Disease Research Laboratory (CVDRL), Department of Neurology, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Shahil H Patel
- Peritz Scheinberg Cerebral Vascular Disease Research Laboratory (CVDRL), Department of Neurology, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Meghan O Blaya
- Department of Neurological Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA
- The Miami Project to Cure Paralysis, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Helen M Bramlett
- Department of Neurological Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA
- The Miami Project to Cure Paralysis, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA
- Bruce W. Carter Department of Veterans Affairs Medical Center, Miami, Florida, USA
| | - Ami P Raval
- Peritz Scheinberg Cerebral Vascular Disease Research Laboratory (CVDRL), Department of Neurology, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA
- Bruce W. Carter Department of Veterans Affairs Medical Center, Miami, Florida, USA
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3
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Liu S, Wu Q, Wang L, Xing C, Guo J, Li B, Ma H, Zhong H, Zhou M, Zhu S, Zhu R, Ning G. Coordination function index: A novel indicator for assessing hindlimb locomotor recovery in spinal cord injury rats based on catwalk gait parameters. Behav Brain Res 2024; 459:114765. [PMID: 37992973 DOI: 10.1016/j.bbr.2023.114765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/13/2023] [Accepted: 11/15/2023] [Indexed: 11/24/2023]
Abstract
In preclinical studies of spinal cord injury (SCI), behavioral assessments are crucial for evaluating treatment effectiveness. Commonly used methods include Basso, Beattie, Bresnahan (BBB) score and the Louisville swim scale (LSS), relying on subjective observations. The CatWalk automated gait analysis system is also widely used in SCI studies, providing extensive gait parameters from footprints. However, these parameters are often used independently or combined simply without utilizing the vast amount of data provided by CatWalk. Therefore, it is necessary to develop a novel approach encompassing multiple CatWalk parameters for a comprehensive and objective assessment of locomotor function. In this work, we screened 208 CatWalk XT gait parameters and identified 38 suitable for assessing hindlimb motor function recovery in a rat thoracic contusion SCI model. Exploratory factor analysis was used to reveal structural relationships among these parameters. Weighted scores for Coordination effectively differentiated hindlimb motor function levels, termed as the Coordinated Function Index (CFI). CFI showed high reliability, exhibiting high correlations with BBB scores, LSS, and T2WI lesion area. Finally, we simplified CFI based on factor loadings and correlation analysis, obtaining a streamlined version with reliable assessment efficacy. In conclusion, we developed a systematic assessment indicator utilizing multiple CatWalk parameters to objectively evaluate hindlimb motor function recovery in rats after thoracic contusion SCI.
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Affiliation(s)
- Song Liu
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China; International Science and Technology Cooperation Base of Spinal Cord lnjury, Tianjin, China; Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin, China
| | - Qiang Wu
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China; International Science and Technology Cooperation Base of Spinal Cord lnjury, Tianjin, China; Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin, China
| | - Liyue Wang
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China; International Science and Technology Cooperation Base of Spinal Cord lnjury, Tianjin, China; Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin, China
| | - Cong Xing
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China; International Science and Technology Cooperation Base of Spinal Cord lnjury, Tianjin, China; Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin, China
| | - Junrui Guo
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China; International Science and Technology Cooperation Base of Spinal Cord lnjury, Tianjin, China; Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin, China
| | - Baicao Li
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China; International Science and Technology Cooperation Base of Spinal Cord lnjury, Tianjin, China; Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin, China
| | - Hongpeng Ma
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China; International Science and Technology Cooperation Base of Spinal Cord lnjury, Tianjin, China; Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin, China
| | - Hao Zhong
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China; International Science and Technology Cooperation Base of Spinal Cord lnjury, Tianjin, China; Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin, China
| | - Mi Zhou
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China; International Science and Technology Cooperation Base of Spinal Cord lnjury, Tianjin, China; Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin, China
| | - Shibo Zhu
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China; International Science and Technology Cooperation Base of Spinal Cord lnjury, Tianjin, China; Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin, China
| | - Rusen Zhu
- Department of Spine Surgery, Tianjin Union Medical Center, Nankai University, Tianjin, China
| | - Guangzhi Ning
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China; International Science and Technology Cooperation Base of Spinal Cord lnjury, Tianjin, China; Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin, China.
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Noguchi T, Katoh H, Nomura S, Okada K, Watanabe M. The GLP-1 receptor agonist exenatide improves recovery from spinal cord injury by inducing macrophage polarization toward the M2 phenotype. Front Neurosci 2024; 18:1342944. [PMID: 38426018 PMCID: PMC10902060 DOI: 10.3389/fnins.2024.1342944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 01/30/2024] [Indexed: 03/02/2024] Open
Abstract
Although a wide variety of mechanisms take part in the secondary injury phase of spinal cord injury (SCI), inflammation is the most important factor implicated in the sequelae after SCI. Being central to the inflammation reaction, macrophages and their polarization are a topic that has garnered wide interest in the studies of SCI secondary injury. The glucagon-like peptide 1 (GLP-1) receptor agonist exenatide has been shown to enhance the endoplasmic reticulum stress response and improve motor function recovery after spinal cord injury (SCI). Since exenatide has also been reported to induce the production of M2 cells in models of cerebral infarction and neurodegenerative diseases, this study was conducted to examine the effects of exenatide administration on the inflammation process that ensues after spinal cord injury. In a rat contusion model of spinal cord injury, the exenatide group received a subcutaneous injection of 10 μg exenatide immediately after injury while those in the control group received 1 mL of phosphate-buffered saline. Quantitative RT-PCR and immunohistochemical staining were used to evaluate the effects of exenatide administration on the macrophages infiltrating the injured spinal cord, especially with regard to macrophage M1 and M2 profiles. The changes in hind limb motor function were assessed based on Basso, Beattie, Bresnahan locomotor rating scale (BBB scale) scores. The improvement in BBB scale scores was significantly higher in the exenatide group from day 7 after injury and onwards. Quantitative RT-PCR revealed an increase in the expression of M2 markers and anti-inflammatory interleukins in the exenatide group that was accompanied by a decrease in the expression of M1 markers and inflammatory cytokines. Immunohistochemical staining showed no significant difference in M1 macrophage numbers between the two groups, but a significantly higher number of M2 macrophages was observed in the exenatide group on day 3 after injury. Our findings suggest that exenatide administration promoted the number of M2-phenotype macrophages after SCI, which may have led to the observed improvement in hind limb motor function in a rat model of SCI.
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Affiliation(s)
| | - Hiroyuki Katoh
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Japan
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Mickle AR, Peñaloza-Aponte JD, Coffey R, Hall NA, Baekey D, Dale EA. Closed-loop cervical epidural stimulation partially restores ipsilesional diaphragm EMG after acute C 2 hemisection. Respir Physiol Neurobiol 2024; 320:104182. [PMID: 37923238 PMCID: PMC11135909 DOI: 10.1016/j.resp.2023.104182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 10/22/2023] [Accepted: 10/22/2023] [Indexed: 11/07/2023]
Abstract
Cervical spinal cord injury creates lasting respiratory deficits which can require mechanical ventilation long-term. We have shown that closed-loop epidural stimulation (CL-ES) elicits respiratory plasticity in the form of increased phrenic network excitability (Malone et. al., E Neuro, Vol 9, 0426-21.2021, 2022); however, the ability of this treatment to create functional benefits for breathing function per se after injury has not been demonstrated. Here, we demonstrate in C2 hemisected anesthetized rats, a 20-minute bout of CL-ES administered at current amplitudes below the motor threshold restores paralyzed hemidiaphragm activity in-phase with breathing while potentiating contralesional activity. While this acute bout of stimulation did not elicit the increased network excitability seen in our chronic model, a subset of stimulated animals continued spontaneous ipsilesional diaphragm activity for several seconds after stopping stimulation. These results support the use of CL-ES as a therapeutic to rescue breathing after high cervical spinal cord injury, with the potential to lead to lasting recovery and device independence.
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Affiliation(s)
- Alyssa R Mickle
- Department of Neuroscience, University of Florida, 1149 Newell Dr, Gainesville, FL 32610, United States; Breathing Research and Therapeutics Center, University of Florida, 1149 Newell Dr, Gainesville, FL 32610, United States; McKnight Brain Institute, University of Florida, 1149 Newell Dr, Gainesville, FL 32610, United States.
| | - Jesús D Peñaloza-Aponte
- Department of Neuroscience, University of Florida, 1149 Newell Dr, Gainesville, FL 32610, United States; Breathing Research and Therapeutics Center, University of Florida, 1149 Newell Dr, Gainesville, FL 32610, United States; McKnight Brain Institute, University of Florida, 1149 Newell Dr, Gainesville, FL 32610, United States
| | - Richard Coffey
- Department of Physiology and Aging, University of Florida, 1600 SW Archer Rd M552, Gainesville, FL 32603, United States
| | - Natale A Hall
- Department of Physiology and Aging, University of Florida, 1600 SW Archer Rd M552, Gainesville, FL 32603, United States
| | - David Baekey
- Department of Neuroscience, University of Florida, 1149 Newell Dr, Gainesville, FL 32610, United States; Breathing Research and Therapeutics Center, University of Florida, 1149 Newell Dr, Gainesville, FL 32610, United States; McKnight Brain Institute, University of Florida, 1149 Newell Dr, Gainesville, FL 32610, United States
| | - Erica A Dale
- Department of Neuroscience, University of Florida, 1149 Newell Dr, Gainesville, FL 32610, United States; Breathing Research and Therapeutics Center, University of Florida, 1149 Newell Dr, Gainesville, FL 32610, United States; McKnight Brain Institute, University of Florida, 1149 Newell Dr, Gainesville, FL 32610, United States; Department of Physiology and Aging, University of Florida, 1600 SW Archer Rd M552, Gainesville, FL 32603, United States
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6
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Zhao C, Zhou T, Li M, Liu J, Zhao X, Pang Y, Liu X, Zhang J, Ma L, Li W, Yao X, Feng S. Argatroban promotes recovery of spinal cord injury by inhibiting the PAR1/JAK2/STAT3 signaling pathway. Neural Regen Res 2024; 19:434-439. [PMID: 37488908 PMCID: PMC10503625 DOI: 10.4103/1673-5374.375345] [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: 08/19/2022] [Revised: 12/28/2022] [Accepted: 03/29/2023] [Indexed: 07/26/2023] Open
Abstract
Argatroban is a synthetic thrombin inhibitor approved by U.S. Food and Drug Administration for the treatment of thrombosis. However, whether it plays a role in the repair of spinal cord injury is unknown. In this study, we established a rat model of T10 moderate spinal cord injury using an NYU Impactor Moder III and performed intraperitoneal injection of argatroban for 3 consecutive days. Our results showed that argatroban effectively promoted neurological function recovery after spinal cord injury and decreased thrombin expression and activity in the local injured spinal cord. RNA sequencing transcriptomic analysis revealed that the differentially expressed genes in the argatroban-treated group were enriched in the JAK2/STAT3 pathway, which is involved in astrogliosis and glial scar formation. Western blotting and immunofluorescence results showed that argatroban downregulated the expression of the thrombin receptor PAR1 in the injured spinal cord and the JAK2/STAT3 signal pathway. Argatroban also inhibited the activation and proliferation of astrocytes and reduced glial scar formation in the spinal cord. Taken together, these findings suggest that argatroban may inhibit astrogliosis by inhibiting the thrombin-mediated PAR1/JAK2/STAT3 signal pathway, thereby promoting the recovery of neurological function after spinal cord injury.
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Affiliation(s)
- Chenxi Zhao
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
- International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
| | - Tiangang Zhou
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
- International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
| | - Ming Li
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
- International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
| | - Jie Liu
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
- International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
| | - Xiaoqing Zhao
- Orthopedic Research Center of Shandong University, Cheeloo College of Medicine, Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, Shandong Province, China
| | - Yilin Pang
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
- International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
| | - Xinjie Liu
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
- International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
| | - Jiawei Zhang
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
- International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
| | - Lei Ma
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
- International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
| | - Wenxiang Li
- Orthopedic Research Center of Shandong University, Cheeloo College of Medicine, Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, Shandong Province, China
| | - Xue Yao
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
- International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
- Orthopedic Research Center of Shandong University, Cheeloo College of Medicine, Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, Shandong Province, China
| | - Shiqing Feng
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
- International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
- Orthopedic Research Center of Shandong University, Cheeloo College of Medicine, Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, Shandong Province, China
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7
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Vijayakumar Sreelatha H, Palekkodan H, Fasaludeen A, K. Krishnan L, Abelson KSP. Refinement of the motorised laminectomy-assisted rat spinal cord injury model by analgesic treatment. PLoS One 2024; 19:e0294720. [PMID: 38227583 PMCID: PMC10790998 DOI: 10.1371/journal.pone.0294720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 11/06/2023] [Indexed: 01/18/2024] Open
Abstract
Usage and reporting of analgesia in animal models of spinal cord injury (SCI) have been sparse and requires proper attention. The majority of experimental SCI research uses rats as an animal model. This study aimed to probe into the effects of some commonly used regimens with NSAIDs and opioids on well-being of the rats as well as on the functional outcome of the model. This eight-week study used forty-two female Wistar rats (Crl: WI), randomly and equally divided into 6 treatment groups, viz. I) tramadol (5mg/kg) and buprenorphine (0.05mg/kg); II) carprofen (5mg/kg) and buprenorphine (0.05mg/kg); III) carprofen (5mg/kg); IV) meloxicam (1mg/kg) and buprenorphine (0.05mg/kg); V) meloxicam (1mg/kg); and VI) no analgesia (0.5 ml sterile saline). Buprenorphine was administered twice daily whereas other treatments were given once daily for five days post-operatively. Injections were given subcutaneously. All animals underwent dental burr-assisted laminectomy at the T10-T11 vertebra level. A custom-built calibrated spring-loaded 200 kilodynes force deliverer was used to induce severe SCI. Weekly body weight scores, Rat Grimace Scale (RGS), and dark-phase home cage activity were used as markers for well-being. Weekly Basso Beattie and Bresnahan (BBB) scores served as markers for functionality together with Novel Object Recognition test (NOR) at week 8 and terminal histopathology using area of vacuolisation and live neuronal count from the ventral horns of spinal cord. It was concluded that the usage of analgesia improved animal wellbeing while having no effects on the functional aspects of the animal model in comparison to the animals that received no analgesics.
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Affiliation(s)
- Harikrishnan Vijayakumar Sreelatha
- Department of Applied Biology, Division of Laboratory Animal Science, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
- Department of Experimental Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Hamza Palekkodan
- Department of Veterinary Pathology, College of Veterinary and Animal Sciences, Pookot, Wayanad, Kerala, India
| | - Ansar Fasaludeen
- Department of Veterinary Pathology, College of Veterinary and Animal Sciences, Pookot, Wayanad, Kerala, India
| | - Lissy K. Krishnan
- Biological Research and Innovation Wing, Dr. Moopen’s Medical College, Wayanad, Kerala, India
| | - Klas S. P. Abelson
- Department of Experimental Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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8
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Gupta S, Singh P, Sharma B. Montelukast Ameliorates 2K1C-Hypertension Induced Endothelial Dysfunction and Associated Vascular Dementia. Curr Hypertens Rev 2024; 20:23-35. [PMID: 38192137 DOI: 10.2174/0115734021276985231204092425] [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: 08/11/2023] [Revised: 10/31/2023] [Accepted: 11/13/2023] [Indexed: 01/10/2024]
Abstract
BACKGROUND Declined kidney function associated with hypertension is a danger for cognitive deficits, dementia, and brain injury. Cognitive decline and vascular dementia (VaD) are serious public health concerns, which highlights the urgent need for study on the risk factors for cognitive decline. Cysteinyl leukotriene (CysLT1) receptors are concerned with regulating cognition, motivation, inflammatory processes, and neurogenesis. OBJECTIVE This research aims to examine the consequence of montelukast (specific CysLT1 antagonist) in renovascular hypertension 2-kidney-1-clip-2K1C model-triggered VaD in experimental animals. METHODS 2K1C tactics were made to prompt renovascular hypertension in mature male rats. Morris water maze was employed to measure cognition. Mean arterial pressure (MAP), serum nitrite levels, aortic superoxide content, vascular endothelial activity, brain's oxidative stress (diminished glutathione, raised lipid peroxides), inflammatory markers (IL-10, IL-6, TNF-α), cholinergic activity (raised acetylcholinesterase), and cerebral injury (staining of 2, 3, 5- triphenylterazolium chloride) were also examined. RESULTS Montelukast in doses of 5.0 and 10.0 mg kg-1 was used intraperitoneally as the treatment drug. Along with cognitive deficits, 2K1C-operated rats showed elevated MAP, endothelial dysfunction, brain oxidative stress, inflammation, and cerebral damage with diminished serum nitrite/nitrate. Montelukast therapy significantly and dose-dependently mitigated the 2K1Chypertension- provoked impaired behaviors, biochemistry, endothelial functions, and cerebral infarction. CONCLUSION The 2K1C tactic caused renovascular hypertension and associated VaD, which was mitigated via targeted regulation of CysLT1 receptors by montelukast administration. Therefore, montelukast may be taken into consideration for the evaluation of its complete potential in renovascular-hypertension-induced VaD.
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MESH Headings
- Animals
- Sulfides
- Cyclopropanes
- Acetates/pharmacology
- Quinolines/pharmacology
- Male
- Dementia, Vascular/physiopathology
- Dementia, Vascular/drug therapy
- Dementia, Vascular/metabolism
- Dementia, Vascular/psychology
- Leukotriene Antagonists/pharmacology
- Oxidative Stress/drug effects
- Hypertension, Renovascular/physiopathology
- Hypertension, Renovascular/drug therapy
- Hypertension, Renovascular/metabolism
- Disease Models, Animal
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/physiopathology
- Endothelium, Vascular/metabolism
- Receptors, Leukotriene/metabolism
- Inflammation Mediators/metabolism
- Cognition/drug effects
- Rats, Wistar
- Brain/drug effects
- Brain/metabolism
- Brain/physiopathology
- Rats
- Maze Learning/drug effects
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Affiliation(s)
- Surbhi Gupta
- Department of Pharmacology, School of Pharmacy, Bharat Institute of Technology, Partapur Bypass, Meerut, Uttar Pradesh, India
| | - Prabhat Singh
- Faculty of Pharmacy, Swami Vivekanand Subharti University, Meerut, Uttar Pradesh, India
| | - Bhupesh Sharma
- Department of Pharmacology, Amity Institute of Pharmacy, Amity University Uttar Pradesh, Noida, India
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9
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Broome ST, Mandwie M, Gorrie CA, Musumeci G, Marzagalli R, Castorina A. Early Alterations of PACAP and VIP Expression in the Female Rat Brain Following Spinal Cord Injury. J Mol Neurosci 2023; 73:724-737. [PMID: 37646964 PMCID: PMC10694121 DOI: 10.1007/s12031-023-02151-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 08/21/2023] [Indexed: 09/01/2023]
Abstract
Previous evidence shows that rapid changes occur in the brain following spinal cord injury (SCI). Here, we interrogated the expression of the neuropeptides pituitary adenylyl cyclase-activating peptide (PACAP), vasoactive intestinal peptides (VIP), and their binding receptors in the rat brain 24 h following SCI. Female Sprague-Dawley rats underwent thoracic laminectomy; half of the rats received a mild contusion injury at the level of the T10 vertebrate (SCI group); the other half underwent sham surgery (sham group). Twenty-four hours post-surgery, the hypothalamus, thalamus, amygdala, hippocampus (dorsal and ventral), prefrontal cortex, and periaqueductal gray were collected. PACAP, VIP, PAC1, VPAC1, and VPAC2 mRNA and protein levels were measured by real-time quantitative polymerase chain reaction and Western blot. In SCI rats, PACAP expression was increased in the hypothalamus (104-141% vs sham) and amygdala (138-350%), but downregulated in the thalamus (35-95%) and periaqueductal gray (58-68%). VIP expression was increased only in the thalamus (175-385%), with a reduction in the amygdala (51-68%), hippocampus (40-75%), and periaqueductal gray (74-76%). The expression of the PAC1 receptor was the least disturbed by SCI, with decrease expression in the ventral hippocampus (63-68%) only. The expression levels of VPAC1 and VPAC2 receptors were globally reduced, with more prominent reductions of VPAC1 vs VPAC2 in the amygdala (21-70%) and ventral hippocampus (72-75%). In addition, VPAC1 downregulation also extended to the dorsal hippocampus (69-70%). These findings demonstrate that as early as 24 h post-SCI, there are region-specific disruptions of PACAP, VIP, and related receptor transcript and protein levels in supraspinal regions controlling higher cognitive functions.
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MESH Headings
- Female
- Rats
- Animals
- Pituitary Adenylate Cyclase-Activating Polypeptide/genetics
- Pituitary Adenylate Cyclase-Activating Polypeptide/metabolism
- Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide/metabolism
- Rats, Sprague-Dawley
- Receptors, Pituitary Hormone/genetics
- Receptors, Pituitary Hormone/metabolism
- Vasoactive Intestinal Peptide/genetics
- Vasoactive Intestinal Peptide/metabolism
- Receptors, Vasoactive Intestinal Polypeptide, Type I/genetics
- Receptors, Vasoactive Intestinal Polypeptide, Type I/metabolism
- Receptors, Vasoactive Intestinal Peptide, Type II/genetics
- Receptors, Vasoactive Intestinal Peptide, Type II/metabolism
- Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, Type I/genetics
- Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, Type I/metabolism
- Spinal Cord Injuries/metabolism
- Brain/metabolism
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Affiliation(s)
- Sarah Thomas Broome
- Laboratory of Cellular and Molecular Neuroscience (LCMN), School of Life Science, Faculty of Science, University of Technology Sydney, PO Box 123 Broadway, Sydney, NSW, 2007, Australia
| | - Mawj Mandwie
- Laboratory of Cellular and Molecular Neuroscience (LCMN), School of Life Science, Faculty of Science, University of Technology Sydney, PO Box 123 Broadway, Sydney, NSW, 2007, Australia
| | - Catherine A Gorrie
- Neural Injury Research Unit, School of Life Science, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
| | - Giuseppe Musumeci
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, Catania, Italy
| | - Rubina Marzagalli
- Laboratory of Cellular and Molecular Neuroscience (LCMN), School of Life Science, Faculty of Science, University of Technology Sydney, PO Box 123 Broadway, Sydney, NSW, 2007, Australia
| | - Alessandro Castorina
- Laboratory of Cellular and Molecular Neuroscience (LCMN), School of Life Science, Faculty of Science, University of Technology Sydney, PO Box 123 Broadway, Sydney, NSW, 2007, Australia.
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10
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Cabrera-Aldana EE, Balderas-Martínez YI, Velázquez-Cruz R, Tovar-y-Romo LB, Sevilla-Montoya R, Martínez-Cruz A, Martinez-Cordero C, Valdés-Flores M, Santamaria-Olmedo M, Hidalgo-Bravo A, Guízar-Sahagún G. Administration of Tamoxifen Can Regulate Changes in Gene Expression during the Acute Phase of Traumatic Spinal Cord Injury. Curr Issues Mol Biol 2023; 45:7476-7491. [PMID: 37754256 PMCID: PMC10529143 DOI: 10.3390/cimb45090472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/28/2023] Open
Abstract
Traumatic spinal cord injury (SCI) causes irreversible damage leading to incapacity. Molecular mechanisms underlying SCI damage are not fully understood, preventing the development of novel therapies. Tamoxifen (TMX) has emerged as a promising therapy. Our aim was to identify transcriptome changes in the acute phase of SCI and the effect of Tamoxifen on those changes in a rat model of SCI. Four groups were considered: (1) Non-injured without TMX (Sham/TMX-), (2) Non-injured with TMX (Sham/TMX+), (3) injured without TMX (SCI/TMX-), and (4) injured with TMX (SCI/TMX+). Tamoxifen was administered intraperitoneally 30 min after injury, and spinal cord tissues were collected 24 h after injury. Clariom S Assays Array was used for transcriptome analysis. After comparing Sham/TMX- versus SCI/TMX-, 708 genes showed differential expression. The enriched pathways were the SCI pathway and pathways related to the inflammatory response. When comparing SCI/TMX- versus SCI/TMX+, only 30 genes showed differential expression, with no pathways enriched. Our results showed differential expression of genes related to the inflammatory response after SCI, and Tamoxifen seems to regulate gene expression changes in Ccr2 and Mmp12. Our study contributes data regarding the potential value of tamoxifen as a therapeutic resource for traumatic SCI during the acute phase.
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Affiliation(s)
- Eibar E. Cabrera-Aldana
- Department of Genomics Medicine, National Institute of Rehabilitation (INR), Calzada Mexico-Xochimilco 289, Arenal de Guadalupe, Mexico City 14389, Mexico; (E.E.C.-A.); (M.V.-F.); (M.S.-O.)
| | - Yalbi I. Balderas-Martínez
- Laboratorio de Biología Computacional, Instituto Nacional de Enfermedades Respiratorias, Ismael Cosío Villegas, Calz. de Tlalpan 4502, Belisario Domínguez Secc 16, Tlalpan, Mexico City 14080, Mexico;
| | - Rafael Velázquez-Cruz
- Genomics of Bone Metabolism Laboratory, National Institute of Genomic Medicine (INMEGEN), Periférico Sur 4809, Arenal Tepepan, Mexico City 14610, Mexico;
| | - Luis B. Tovar-y-Romo
- Department of Molecular Neuropathology, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ciudad Universitaria, Circuito Exterior s/n, Mexico City 04510, Mexico;
| | - Rosalba Sevilla-Montoya
- Reproductive Research and Perinatal Health Department, National Institute of Perinatology, Montes Urales 800, Lomas de Virreyes, Mexico City 11000, Mexico;
| | - Angelina Martínez-Cruz
- Department of Experimental Surgery, Proyecto Camina, A.C. 4430 Calz. Tlalpan, Mexico City 14050, Mexico;
| | - Claudia Martinez-Cordero
- Regional Hospital of High Specialty of the Bajio, Blvd. Milenio 130, Col. San Carlos la Roncha, León 37660, Guanajuato, Mexico;
| | - Margarita Valdés-Flores
- Department of Genomics Medicine, National Institute of Rehabilitation (INR), Calzada Mexico-Xochimilco 289, Arenal de Guadalupe, Mexico City 14389, Mexico; (E.E.C.-A.); (M.V.-F.); (M.S.-O.)
| | - Monica Santamaria-Olmedo
- Department of Genomics Medicine, National Institute of Rehabilitation (INR), Calzada Mexico-Xochimilco 289, Arenal de Guadalupe, Mexico City 14389, Mexico; (E.E.C.-A.); (M.V.-F.); (M.S.-O.)
| | - Alberto Hidalgo-Bravo
- Department of Genomics Medicine, National Institute of Rehabilitation (INR), Calzada Mexico-Xochimilco 289, Arenal de Guadalupe, Mexico City 14389, Mexico; (E.E.C.-A.); (M.V.-F.); (M.S.-O.)
| | - Gabriel Guízar-Sahagún
- Research Unit for Neurological Diseases, Instituto Mexicano del Seguro Social, 330 Avenida Cuauhtémoc, Mexico City 06720, Mexico
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11
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Roussel M, Lafrance-Zoubga D, Josset N, Lemieux M, Bretzner F. Functional contribution of mesencephalic locomotor region nuclei to locomotor recovery after spinal cord injury. Cell Rep Med 2023; 4:100946. [PMID: 36812893 PMCID: PMC9975330 DOI: 10.1016/j.xcrm.2023.100946] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 12/09/2022] [Accepted: 01/23/2023] [Indexed: 02/23/2023]
Abstract
Spinal cord injury (SCI) results in a disruption of information between the brain and the spinal circuit. Electrical stimulation of the mesencephalic locomotor region (MLR) can promote locomotor recovery in acute and chronic SCI rodent models. Although clinical trials are currently under way, there is still debate about the organization of this supraspinal center and which anatomic correlate of the MLR should be targeted to promote recovery. Combining kinematics, electromyographic recordings, anatomic analysis, and mouse genetics, our study reveals that glutamatergic neurons of the cuneiform nucleus contribute to locomotor recovery by enhancing motor efficacy in hindlimb muscles, and by increasing locomotor rhythm and speed on a treadmill, over ground, and during swimming in chronic SCI mice. In contrast, glutamatergic neurons of the pedunculopontine nucleus slow down locomotion. Therefore, our study identifies the cuneiform nucleus and its glutamatergic neurons as a therapeutical target to improve locomotor recovery in patients living with SCI.
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Affiliation(s)
- Marie Roussel
- Centre de Recherche du CHU de Québec, CHUL-Neurosciences, 2705 Boul. Laurier, Québec, QC G1V 4G2, Canada
| | - David Lafrance-Zoubga
- Centre de Recherche du CHU de Québec, CHUL-Neurosciences, 2705 Boul. Laurier, Québec, QC G1V 4G2, Canada
| | - Nicolas Josset
- Centre de Recherche du CHU de Québec, CHUL-Neurosciences, 2705 Boul. Laurier, Québec, QC G1V 4G2, Canada
| | - Maxime Lemieux
- Centre de Recherche du CHU de Québec, CHUL-Neurosciences, 2705 Boul. Laurier, Québec, QC G1V 4G2, Canada
| | - Frederic Bretzner
- Centre de Recherche du CHU de Québec, CHUL-Neurosciences, 2705 Boul. Laurier, Québec, QC G1V 4G2, Canada; Faculty of Medicine, Department of Psychiatry and Neurosciences, Université Laval, Québec, QC G1V 4G2, Canada.
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12
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Hashemizadeh S, Gharaylou Z, Hosseindoost S, Sardari M, Omidi A, Hosseini ravandi H, Hadjighassem M. Long-term administration of bumetanide improve functional recovery after spinal cord injury in rats. Front Pharmacol 2022; 13:932487. [PMID: 36339604 PMCID: PMC9628211 DOI: 10.3389/fphar.2022.932487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 08/24/2022] [Indexed: 11/16/2022] Open
Abstract
Ion disturbances are among the most remarkable deficits in spinal cord injury (SCI). GABA is an integral part of neural interaction. Action of the GABAA receptor depends on the amount of intracellular chloride. Homeostasis of chloride is controlled by two co-transporters, NKCC1 and KCC2. Previous studies revealed that NKCC1 are disturbed in SCI. In this study, NKCC1 is highly expressed in the epicenter of the lesioned spinal cord at 3 hours after induction of the lesion and reached the peak around 6 hours after SCI. Bumetanide (2 and 4 mg/day), as a specific NKCC1 inhibitor, was used at 3 hours post SCI for 28 days. The functional recovery outcomes were measured by the Basso–Beattie–Bresnahan (BBB) locomotor rating scale, ladder walking test, and hot plate test. The rats that received bumetanide 4 mg/day exhibited improved recovery of locomotor function, reduction of NKCC1 gene expression, and upregulation of GAP protein levels 28 days post SCI. Histological tissue evaluations confirmed bumetanide’s neuroprotective and regenerative effects. This study provides novel evidence for the benefits of bumetanide in early administration after SCI.
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Affiliation(s)
- Shiva Hashemizadeh
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
- School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Saereh Hosseindoost
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
- Pain Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Sardari
- Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Ameneh Omidi
- Department of Anatomical Sciences, Faculty of Medical Science, Tarbiat Modares University, Tehran, Iran
| | | | - Mahmoudreza Hadjighassem
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
- School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
- *Correspondence: Mahmoudreza Hadjighassem,
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13
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Zheng G, Zhang H, Tail M, Wang H, Walter J, Skutella T, Unterberg A, Zweckberger K, Younsi A. Assessment of hindlimb motor recovery after severe thoracic spinal cord injury in rats: classification of CatWalk XT® gait analysis parameters. Neural Regen Res 2022; 18:1084-1089. [PMID: 36254997 PMCID: PMC9827780 DOI: 10.4103/1673-5374.355763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Assessment of locomotion recovery in preclinical studies of experimental spinal cord injury remains challenging. We studied the CatWalk XT® gait analysis for evaluating hindlimb functional recovery in a widely used and clinically relevant thoracic contusion/compression spinal cord injury model in rats. Rats were randomly assigned to either a T9 spinal cord injury or sham laminectomy. Locomotion recovery was assessed using the Basso, Beattie, and Bresnahan open field rating scale and the CatWalk XT® gait analysis. To determine the potential bias from weight changes, corrected hindlimb (H) values (divided by the unaffected forelimb (F) values) were calculated. Six weeks after injury, cyst formation, astrogliosis, and the deposition of chondroitin sulfate glycosaminoglycans were assessed by immunohistochemistry staining. Compared with the baseline, a significant spontaneous recovery could be observed in the CatWalk XT® parameters max intensity, mean intensity, max intensity at%, and max contact mean intensity from 4 weeks after injury onwards. Of note, corrected values (H/F) of CatWalk XT® parameters showed a significantly less vulnerability to the weight changes than absolute values, specifically in static parameters. The corrected CatWalk XT® parameters were positively correlated with the Basso, Beattie, and Bresnahan rating scale scores, cyst formation, the immunointensity of astrogliosis and chondroitin sulfate glycosaminoglycan deposition. The CatWalk XT® gait analysis and especially its static parameters, therefore, seem to be highly useful in assessing spontaneous recovery of hindlimb function after severe thoracic spinal cord injury. Because many CatWalk XT® parameters of the hindlimbs seem to be affected by body weight changes, using their corrected values might be a valuable option to improve this dependency.
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Affiliation(s)
- Guoli Zheng
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Hao Zhang
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Mohamed Tail
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Hao Wang
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Johannes Walter
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Thomas Skutella
- Department of Neuroanatomy, Institute for Anatomy and Cell Biology, University of Heidelberg, Heidelberg, Germany
| | - Andreas Unterberg
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Klaus Zweckberger
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Alexander Younsi
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany,Correspondence to: Alexander Younsi, .
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14
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Oral administration of Lithium Chloride Ameliorate Spinal Cord Injury-Induced Hyperalgesia in Male Rats. PHARMANUTRITION 2022. [DOI: 10.1016/j.phanu.2022.100307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Osimanjiang W, Allgood JE, Van Sandt RL, Burns DT, Bushman JS. Sexual Dimorphism in Lesion Size and Sensorimotor Responses Following Spinal Cord Injury. Front Neurol 2022; 13:925797. [PMID: 36994113 PMCID: PMC10041393 DOI: 10.3389/fneur.2022.925797] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 05/31/2022] [Indexed: 03/14/2023] Open
Abstract
Spinal cord injury (SCI) is a devastating disorder, which impacts the lives of millions of people worldwide with no clinically standardized treatment. Both pro-recovery and anti-recovery factors contribute to the overall outcome after the initial SCI. Sex is emerging as an important variable, which can affect recovery post-SCI. Contusion SCI at T10 was generated in male and female rats. Open-field Basso, Beattie, Bresnahan (BBB) behavioral test, Von Frey test, and CatWalk gate analysis were performed. Histological analysis was performed at the 45-day post-SCI end point. Male/female differences in sensorimotor function recovery, lesion size, and the recruitment of immune cells to the lesion area were measured. A group of males with less severe injuries was included to compare the outcomes for severity. Our results show that both sexes with the same injury level plateaued at a similar final score for locomotor function. Males in the less severe injury group recovered faster and plateaued at a higher BBB score compared to the more severe injury group. Von Frey tests show faster recovery of sensory function in females compared to both male groups. All three groups exhibited reduced mechanical response thresholds after SCI. The lesion area was significantly larger in the male group with severe injury than in females, as well as in males of less severe injury. No significant differences in immune cell recruitment were identified when comparing the three groups. The faster sensorimotor recovery and significantly smaller lesion area in females potentially indicate that neuroprotection against the secondary injury is a likely reason for sex-dependent differences in functional outcomes after SCI.
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Affiliation(s)
- Wupu Osimanjiang
- Division of Pharmaceutical Sciences, University of Wyoming, Laramie, WY, United States
| | - JuliAnne E. Allgood
- Division of Pharmaceutical Sciences, University of Wyoming, Laramie, WY, United States
| | - Rae L. Van Sandt
- Department of Veterinary Sciences, University of Wyoming, Laramie, WY, United States
| | - Daniel T. Burns
- Division of Pharmaceutical Sciences, University of Wyoming, Laramie, WY, United States
| | - Jared S. Bushman
- Division of Pharmaceutical Sciences, University of Wyoming, Laramie, WY, United States
- *Correspondence: Jared S. Bushman
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16
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Zhao C, Zhou T, Zhao X, Pang Y, Li W, Fan B, Li M, Liu X, Ma L, Zhang J, Sun C, Shen W, Kong X, Yao X, Feng S. Delayed administration of nafamostat mesylate inhibits thrombin-mediated blood-spinal cord barrier breakdown during acute spinal cord injury in rats. J Neuroinflammation 2022; 19:189. [PMID: 35842640 PMCID: PMC9287720 DOI: 10.1186/s12974-022-02531-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Accepted: 06/15/2022] [Indexed: 01/10/2023] Open
Abstract
Background Nafamostat mesylate (nafamostat, NM) is an FDA-approved serine protease inhibitor that exerts anti-neuroinflammation and neuroprotective effects following rat spinal cord injury (SCI). However, clinical translation of nafamostat has been limited by an unclear administration time window and mechanism of action. Methods Time to first dose of nafamostat administration was tested on rats after contusive SCI. The optimal time window of nafamostat was screened by evaluating hindlimb locomotion and electrophysiology. As nafamostat is a serine protease inhibitor known to target thrombin, we used argatroban (Arg), a thrombin-specific inhibitor, as a positive control in the time window experiments. Western blot and immunofluorescence of thrombin expression level and its enzymatic activity were assayed at different time points, as well its receptor, the protease activated receptor 1 (PAR1) and downstream protein matrix metalloproteinase-9 (MMP9). Blood–spinal cord barrier (BSCB) permeability leakage indicator Evans Blue and fibrinogen were analyzed along these time points. The infiltration of peripheral inflammatory cell was observed by immunofluorescence. Results The optimal administration time window of nafamostat was 2–12 h post-injury. Argatroban, the thrombin-specific inhibitor, had a similar pattern. Thrombin expression peaked at 12 h and returned to normal level at 7 days post-SCI. PAR1, the thrombin receptor, and MMP9 were significantly upregulated after SCI. The most significant increase of thrombin expression was detected in vascular endothelial cells (ECs). Nafamostat and argatroban significantly downregulated thrombin and MMP9 expression as well as thrombin activity in the spinal cord. Nafamostat inhibited thrombin enrichment in endothelial cells. Nafamostat administration at 2–12 h after SCI inhibited the leakage of Evans Blue in the epicenter and upregulated tight junction proteins (TJPs) expression. Nafamostat administration 8 h post-SCI effectively inhibited the infiltration of peripheral macrophages and neutrophils to the injury site. Conclusions Our study provides preclinical information of nafamostat about the administration time window of 2–12 h post-injury in contusive SCI. We revealed that nafamostat functions through inhibiting the thrombin-mediated BSCB breakdown and subsequent peripheral immune cells infiltration. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-022-02531-w.
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Affiliation(s)
- Chenxi Zhao
- Department of Orthopedics, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, China.,Department of Orthopedics, Orthopedic Research Center of Shandong University, Cheeloo College of Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Tiangang Zhou
- Department of Orthopedics, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, China
| | - Xiaoqing Zhao
- Department of Orthopedics, Orthopedic Research Center of Shandong University, Cheeloo College of Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Yilin Pang
- Department of Orthopedics, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, China
| | - Wenxiang Li
- Department of Orthopedics, Orthopedic Research Center of Shandong University, Cheeloo College of Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Baoyou Fan
- Department of Orthopedics, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, China
| | - Ming Li
- Department of Orthopedics, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, China
| | - Xinjie Liu
- Department of Orthopedics, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, China
| | - Lei Ma
- Department of Orthopedics, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, China
| | - Jiawei Zhang
- Department of Orthopedics, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, China
| | - Chao Sun
- Department of Orthopedics, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, China
| | - Wenyuan Shen
- Department of Orthopedics, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, China
| | - Xiaohong Kong
- Department of Orthopedics, Orthopedic Research Center of Shandong University, Cheeloo College of Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Xue Yao
- Department of Orthopedics, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, China. .,Department of Orthopedics, Orthopedic Research Center of Shandong University, Cheeloo College of Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China.
| | - Shiqing Feng
- Department of Orthopedics, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, China. .,Department of Orthopedics, Orthopedic Research Center of Shandong University, Cheeloo College of Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China.
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17
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Zhao C, Rao JS, Duan H, Hao P, Shang J, Fan Y, Zhao W, Gao Y, Yang Z, Sun YE, Li X. Chronic spinal cord injury repair by NT3-chitosan only occurs after clearance of the lesion scar. Signal Transduct Target Ther 2022; 7:184. [PMID: 35710784 PMCID: PMC9203793 DOI: 10.1038/s41392-022-01010-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 03/22/2022] [Accepted: 04/06/2022] [Indexed: 11/24/2022] Open
Abstract
Spinal cord injury (SCI) is a severe damage usually leading to limb dysesthesia, motor dysfunction, and other physiological disability. We have previously shown that NT3-chitosan could trigger an acute SCI repairment in rats and non-human primates. Due to the negative effect of inhibitory molecules in glial scar on axonal regeneration, however, the role of NT3-chitosan in the treatment of chronic SCI remains unclear. Compared with the fresh wound of acute SCI, how to handle the lesion core and glial scars is a major issue related to chronic-SCI repair. Here we report, in a chronic complete SCI rat model, establishment of magnetic resonance-diffusion tensor imaging (MR-DTI) methods to monitor spatial and temporal changes of the lesion area, which matched well with anatomical analyses. Clearance of the lesion core via suction of cystic tissues and trimming of solid scar tissues before introducing NT3-chitosan using either a rigid tubular scaffold or a soft gel form led to robust neural regeneration, which interconnected the severed ascending and descending axons and accompanied with electrophysiological and motor functional recovery. In contrast, cystic tissue extraction without scar trimming followed by NT3-chitosan injection, resulted in little, if any regeneration. Taken together, after lesion core clearance, NT3-chitosan can be used to enable chronic-SCI repair and MR-DTI-based mapping of lesion area and monitoring of ongoing regeneration can potentially be implemented in clinical studies for subacute/chronic-SCI repair.
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Affiliation(s)
- Can Zhao
- Beijing Key Laboratory for Biomaterials and Neural Regeneration, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100083, China.,Institute of Rehabilitation Engineering, China Rehabilitation Science Institute, Beijing, 100068, China
| | - Jia-Sheng Rao
- Beijing Key Laboratory for Biomaterials and Neural Regeneration, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100083, China
| | - Hongmei Duan
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Peng Hao
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Junkui Shang
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Yubo Fan
- Beijing Advanced Innovation Centre for Biomedical Engineering, Key Laboratory for Biomechanics and Mechanobiology of Chinese Education Ministry, School of Biological Science and Medical Engineering, Beihang University, Beijing, 10083, China.,School of Engineering Medicine, Beihang University, Beijing, 10083, China
| | - Wen Zhao
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Yudan Gao
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Zhaoyang Yang
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China.
| | - Yi Eve Sun
- Shanghai Institute of Stem Cell Research and Clinical Translation, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China. .,Department of Psychiatry and Biobehavioral Sciences, UCLA Medical School, Los Angeles, CA, 90095, USA.
| | - Xiaoguang Li
- Beijing Key Laboratory for Biomaterials and Neural Regeneration, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100083, China. .,Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China.
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18
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Van Broeckhoven J, Erens C, Sommer D, Scheijen E, Sanchez S, Vidal PM, Dooley D, Van Breedam E, Quarta A, Ponsaerts P, Hendrix S, Lemmens S. Macrophage-based delivery of interleukin-13 improves functional and histopathological outcomes following spinal cord injury. J Neuroinflammation 2022; 19:102. [PMID: 35488301 PMCID: PMC9052547 DOI: 10.1186/s12974-022-02458-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 04/07/2022] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Spinal cord injury (SCI) elicits a robust neuroinflammatory reaction which, in turn, exacerbates the initial mechanical damage. Pivotal players orchestrating this response are macrophages (Mφs) and microglia. After SCI, the inflammatory environment is dominated by pro-inflammatory Mφs/microglia, which contribute to secondary cell death and prevent regeneration. Therefore, reprogramming Mφ/microglia towards a more anti-inflammatory and potentially neuroprotective phenotype has gained substantial therapeutic interest in recent years. Interleukin-13 (IL-13) is a potent inducer of such an anti-inflammatory phenotype. In this study, we used genetically modified Mφs as carriers to continuously secrete IL-13 (IL-13 Mφs) at the lesion site. METHODS Mφs were genetically modified to secrete IL-13 (IL-13 Mφs) and were phenotypically characterized using qPCR, western blot, and ELISA. To analyze the therapeutic potential, the IL-13 Mφs were intraspinally injected at the perilesional area after hemisection SCI in female mice. Functional recovery and histopathological improvements were evaluated using the Basso Mouse Scale score and immunohistochemistry. Neuroprotective effects of IL-13 were investigated using different cell viability assays in murine and human neuroblastoma cell lines, human neurospheroids, as well as murine organotypic brain slice cultures. RESULTS In contrast to Mφs prestimulated with recombinant IL-13, perilesional transplantation of IL-13 Mφs promoted functional recovery following SCI in mice. This improvement was accompanied by reduced lesion size and demyelinated area. The local anti-inflammatory shift induced by IL-13 Mφs resulted in reduced neuronal death and fewer contacts between dystrophic axons and Mφs/microglia, suggesting suppression of axonal dieback. Using IL-4Rα-deficient mice, we show that IL-13 signaling is required for these beneficial effects. Whereas direct neuroprotective effects of IL-13 on murine and human neuroblastoma cell lines or human neurospheroid cultures were absent, IL-13 rescued murine organotypic brain slices from cell death, probably by indirectly modulating the Mφ/microglia responses. CONCLUSIONS Collectively, our data suggest that the IL-13-induced anti-inflammatory Mφ/microglia phenotype can preserve neuronal tissue and ameliorate axonal dieback, thereby promoting recovery after SCI.
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Affiliation(s)
- Jana Van Broeckhoven
- Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, 3590, Diepenbeek, Belgium
| | - Céline Erens
- Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, 3590, Diepenbeek, Belgium
| | - Daniela Sommer
- Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, 3590, Diepenbeek, Belgium
| | - Elle Scheijen
- Department of Neurosciences, Biomedical Research Institute, Hasselt University, 3590, Diepenbeek, Belgium
| | - Selien Sanchez
- Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, 3590, Diepenbeek, Belgium
| | - Pia M Vidal
- Neuroimmunology and Regeneration of the Central Nervous System Unit, Biomedical Science Research Laboratory, Basic Sciences Department, Faculty of Medicine, Universidad Católica de la Santísima Concepción, 4090541, Concepción, Chile
| | - Dearbhaile Dooley
- School of Medicine, Health Sciences Centre, University College Dublin, Belfield, Dublin 4, Ireland.,UCD Conway Institute of Biomolecular & Biomedical Research University College Dublin, Belfield, Dublin 4, Ireland
| | - Elise Van Breedam
- Laboratory of Experimental Hematology, University of Antwerp, 2610, Wilrijk, Belgium.,Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, 2610, Wilrijk, Belgium
| | - Alessandra Quarta
- Laboratory of Experimental Hematology, University of Antwerp, 2610, Wilrijk, Belgium.,Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, 2610, Wilrijk, Belgium
| | - Peter Ponsaerts
- Laboratory of Experimental Hematology, University of Antwerp, 2610, Wilrijk, Belgium.,Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, 2610, Wilrijk, Belgium
| | - Sven Hendrix
- Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, 3590, Diepenbeek, Belgium. .,Medical School Hamburg, Am Kaiserkai 1, 20457, Hamburg, Germany.
| | - Stefanie Lemmens
- Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, 3590, Diepenbeek, Belgium
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19
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Sung SE, Seo MS, Kim YI, Kang KK, Choi JH, Lee S, Sung M, Yim SG, Lim JH, Seok HG, Yang SY, Lee GW. Human Epidural AD–MSC Exosomes Improve Function Recovery after Spinal Cord Injury in Rats. Biomedicines 2022; 10:biomedicines10030678. [PMID: 35327480 PMCID: PMC8945172 DOI: 10.3390/biomedicines10030678] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 03/04/2022] [Accepted: 03/10/2022] [Indexed: 02/08/2023] Open
Abstract
Spinal cord injury (SCI) interferes with the normal function of the autonomic nervous system by blocking circuits between the sensory and motor nerves. Although many studies focus on functional recovery after neurological injury, effective neuroregeneration is still being explored. Recently, extracellular vesicles such as exosomes have emerged as cell-free therapeutic agents owing to their ability of cell-to-cell communication. In particular, exosomes released from mesenchymal stem cells (MSCs) have the potential for tissue regeneration and exhibit therapeutic effectiveness in neurological disorders. In this study, we isolated exosomes from human epidural adipose tissue-derived MSCs (hEpi AD–MSCs) using the tangential flow filtration method. The isolated exosomes were analyzed for size, concentration, shape, and major surface markers using nanoparticle tracking analysis, transmission electron microscopy, and flow cytometry. To evaluate their effect on SCI recovery, hEpi AD–MSC exosomes were injected intravenously in SCI-induced rats. hEpi AD–MSC exosomes improved the locomotor function of SCI-induced rats. The results of histopathological and cytokine assays showed that hEpi AD–MSC exosomes regulated inflammatory response. Genetic profiling of the rat spinal cord tissues revealed changes in the expression of inflammation-related genes after exosome administration. Collectively, hEpi AD–MSC exosomes are effective in restoring spinal functions by reducing the inflammatory response.
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Affiliation(s)
- Soo-Eun Sung
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 41061, Korea; (S.-E.S.); (M.-S.S.); (K.-K.K.); (J.-H.C.); (S.L.); (M.S.)
- Department of Biomaterials Science (BK21 Four Program), Pusan National University, Miryang 50463, Korea;
| | - Min-Soo Seo
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 41061, Korea; (S.-E.S.); (M.-S.S.); (K.-K.K.); (J.-H.C.); (S.L.); (M.S.)
| | | | - Kyung-Ku Kang
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 41061, Korea; (S.-E.S.); (M.-S.S.); (K.-K.K.); (J.-H.C.); (S.L.); (M.S.)
| | - Joo-Hee Choi
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 41061, Korea; (S.-E.S.); (M.-S.S.); (K.-K.K.); (J.-H.C.); (S.L.); (M.S.)
| | - Sijoon Lee
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 41061, Korea; (S.-E.S.); (M.-S.S.); (K.-K.K.); (J.-H.C.); (S.L.); (M.S.)
| | - Minkyoung Sung
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 41061, Korea; (S.-E.S.); (M.-S.S.); (K.-K.K.); (J.-H.C.); (S.L.); (M.S.)
| | - Sang-Gu Yim
- Department of Biomaterials Science (BK21 Four Program), Pusan National University, Miryang 50463, Korea;
| | - Ju-Hyeon Lim
- Department of Orthopedic Surgery, Yeungnam University Medical Center, Yeungnam University College of Medicine, 170, Hyochung-ro, Namgu, Daegu 42415, Korea; (J.-H.L.); (H.-G.S.)
- Company Culture Team, Kolmar Korea Holdings 61, Heolleung-ro 8 gill, Seocho-gu, Seoul 06800, Korea
| | - Hyun-Gyu Seok
- Department of Orthopedic Surgery, Yeungnam University Medical Center, Yeungnam University College of Medicine, 170, Hyochung-ro, Namgu, Daegu 42415, Korea; (J.-H.L.); (H.-G.S.)
| | - Seung-Yun Yang
- Department of Biomaterials Science (BK21 Four Program), Pusan National University, Miryang 50463, Korea;
- Correspondence: (S.-Y.Y.); (G.-W.L.); Tel.: +82-55-350-5382 (S.-Y.Y.); +82-53-620-3642 (G.-W.L.)
| | - Gun-Woo Lee
- Cellexobio, Co., Ltd., Daegu 42415, Korea;
- Department of Orthopedic Surgery, Yeungnam University Medical Center, Yeungnam University College of Medicine, 170, Hyochung-ro, Namgu, Daegu 42415, Korea; (J.-H.L.); (H.-G.S.)
- Correspondence: (S.-Y.Y.); (G.-W.L.); Tel.: +82-55-350-5382 (S.-Y.Y.); +82-53-620-3642 (G.-W.L.)
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20
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Li Y, Ritzel RM, Lei Z, Cao T, He J, Faden AI, Wu J. Sexual dimorphism in neurological function after SCI is associated with disrupted neuroinflammation in both injured spinal cord and brain. Brain Behav Immun 2022; 101:1-22. [PMID: 34954073 PMCID: PMC8885910 DOI: 10.1016/j.bbi.2021.12.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 11/29/2021] [Accepted: 12/18/2021] [Indexed: 10/19/2022] Open
Abstract
Whereas human spinal cord injury (SCI) is more common in men, the prevalence is growing in women. However, little is known about the effect of biological sex on brain dysfunction and injury mechanisms. To model the highest per capita rate of injury (ages between 16 and 30 years old) in humans, in the present study, young adult or a young/middle-aged male and female C57BL/6 mice were subjected to moderate contusion SCI. When mice were injured at 10-12-week-old, transcriptomic analysis of inflammation-related genes and flow cytometry revealed a more aggressive neuroinflammatory profile in male than females following 3 d SCI, ostensibly driven by sex-specific changes myeloid cell function rather than cell number. Female mice were generally more active at baseline, as evidenced by greater distance traveled in the open field. After SCI, female mice had more favorable locomotor function than male animals. At 13 weeks post-injury, male mice showed poor performance in cognitive and depressive-like behavioral tests, while injured female mice showed fewer deficits in these tasks. However, when injured at 6 months old followed by 8 months post-injury, male mice had considerably less inflammatory activation compared with female animals despite having similar or worse outcomes in affective, cognitive, and motor tasks. Collectively, these findings indicate that sex differences in functional outcome after SCI are associated with the age at onset of injury, as well as disrupted neuroinflammation not only at the site of injury but also in remote brain regions. Thus, biological sex should be considered when designing new therapeutic agents.
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Affiliation(s)
- Yun Li
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Rodney M. Ritzel
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Zhuofan Lei
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Tuoxin Cao
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Junyun He
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Alan I Faden
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA,University of Maryland Center to Advance Chronic Pain Research, University of Maryland, Baltimore, MD, 21201 USA
| | - Junfang Wu
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA; University of Maryland Center to Advance Chronic Pain Research, University of Maryland, Baltimore, MD 21201, USA.
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21
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Van Sandt RL, Welsh CJ, Jeffery ND, Young CR, McCreedy DA, Wright GA, Boudreau CE, Levine GJ, Levine JM. Circulating neutrophil activation in dogs with naturally occurring spinal cord injury secondary to intervertebral disk herniation. Am J Vet Res 2022; 83:324-330. [DOI: 10.2460/ajvr.21.05.0073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
OBJECTIVE
To investigate the time course of circulating neutrophil priming and activity in dogs with spinal cord injury secondary to intervertebral disk herniation that undergo decompressive surgery.
ANIMALS
9 dogs with spinal cord injury and 9 healthy dogs (controls).
PROCEDURES
For dogs with spinal cord injury, blood samples were collected on the day of hospital admission and 3, 7, 30, and 90 days after injury and decompressive surgery. A single blood sample was collected from the control dogs. Flow cytometry analysis was performed on isolated neutrophils incubated with antibody against CD11b and nonfluorescent dihydrorhodamine 123, which was converted to fluorescent rhodamine 123 to measure oxidative burst activity.
RESULTS
Expression of CD11b was increased in dogs with spinal cord injury 3 days after injury and decompressive surgery, relative to day 7 expression. Neutrophils expressed high oxidative burst activity both 3 and 7 days after injury and decompressive surgery, compared with activity in healthy dogs.
CLINICAL RELEVANCE
For dogs with spinal cord injury, high CD11b expression 3 days after injury and decompressive surgery was consistent with findings for rodents with experimentally induced spinal cord injury. However, the high oxidative burst activity 3 and 7 days after injury and decompressive surgery was not consistent with data from other species, and additional studies on inflammatory events in dogs with naturally occurring spinal cord injury are needed.
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Affiliation(s)
- Rae L. Van Sandt
- 1Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
- 2Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
| | - C. Jane Welsh
- 2Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
| | - Nick D. Jeffery
- 1Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
| | - Colin R. Young
- 2Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
| | - Dylan A. McCreedy
- 3Department of Biology, College of Science, Texas A&M University, College Station, TX
| | - Gus A. Wright
- 4Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
- 5Flow Cytometry Facility, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
| | - C. Elizabeth Boudreau
- 1Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
| | - Gwendolyn J. Levine
- 4Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
| | - Jonathan M. Levine
- 1Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
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22
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Mandwie M, Piper JA, Gorrie CA, Keay KA, Musumeci G, Al-Badri G, Castorina A. Rapid GFAP and Iba1 expression changes in the female rat brain following spinal cord injury. Neural Regen Res 2022; 17:378-385. [PMID: 34269213 PMCID: PMC8463994 DOI: 10.4103/1673-5374.317982] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Evidence suggests that rapid changes to supporting glia may predispose individuals with spinal cord injury (SCI) to such comorbidities. Here, we interrogated the expression of astrocyte- and microglial-specific markers glial fibrillary acidic protein (GFAP) and ionized calcium binding adaptor molecule 1 (Iba1) in the rat brain in the first 24 hours following SCI. Female Sprague-Dawley rats underwent thoracic laminectomy; half of the rats received a mild contusion injury at the level of the T10 vertebral body (SCI group), the other half did not (Sham group). Twenty-four hours post-surgery the amygdala, periaqueductal grey, prefrontal cortex, hypothalamus, lateral thalamus, hippocampus (dorsal and ventral) in rats were collected. GFAP and Iba1 mRNA and protein levels were measured by real-time quantitative polymerase chain reaction and Western blot. In SCI rats, GFAP mRNA and protein expression increased in the amygdala and hypothalamus. In contrast, gene and protein expression decreased in the thalamus and dorsal hippocampus. Interestingly, Iba1 transcripts and proteins were significantly diminished only in the dorsal and ventral hippocampus, where gene expression diminished. These findings demonstrate that as early as 24 hours post-SCI there are region-specific disruptions of GFAP and Iba1 transcript and protein levels in higher brain regions. All procedures were approved by the University of Technology Sydney Institutional Animal Care and Ethics Committee (UTS ACEC13-0069).
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Affiliation(s)
- Mawj Mandwie
- Laboratory of Cellular and Molecular Neuroscience (LCMN), School of Life Science, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
| | - Jordan A Piper
- Laboratory of Cellular and Molecular Neuroscience (LCMN), School of Life Science, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
| | - Catherine A Gorrie
- Neural Injury Research Unit, School of Life Science, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
| | - Kevin A Keay
- School of Medical Sciences (Neuroscience), The University of Sydney, Sydney, NSW, Australia
| | - Giuseppe Musumeci
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, Catania, Italy
| | - Ghaith Al-Badri
- Laboratory of Cellular and Molecular Neuroscience (LCMN), School of Life Science, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
| | - Alessandro Castorina
- Laboratory of Cellular and Molecular Neuroscience (LCMN), School of Life Science, Faculty of Science, University of Technology Sydney; School of Medical Sciences (Neuroscience), The University of Sydney, Sydney, NSW, Australia
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23
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Baine RE, Johnston DT, Strain MM, Henwood MK, Davis JA, Reynolds JA, Giles ED, Grau JW. Noxious Stimulation Induces Acute Hemorrhage and Impairs Long-Term Recovery after Spinal Cord Injury (SCI) in Female Rats: Evidence Estrous Cycle May Have a Modulatory Effect. Neurotrauma Rep 2022; 3:70-86. [PMID: 35112109 PMCID: PMC8804264 DOI: 10.1089/neur.2021.0055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Spinal cord injuries (SCIs) are often the result of traumatic accidents, which also produce multiple other injuries (polytrauma). Nociceptive input from associated injuries has been shown to significantly impair recovery post-SCI. Historically, work in our laboratory has focused exclusively on male animals; however, increasing incidence of SCI in females requires research to determine whether pain (nociceptive) input poses the same risk to their recovery. Some animal studies have shown that females demonstrate greater tissue preservation and better locomotor recovery post-SCI. Given this, we examined the effect of sex on SCI recovery in two pain models—intermittent electrical stimulation (shock) to the tail or capsaicin injection to the hindpaw. Female rats received a lower thoracic contusion injury and were exposed to noxious stimulation the next day. The acute effect of noxious input on cardiovascular function, locomotor performance, and hemorrhage were assessed. Treatment with capsaicin or noxious electrical stimulation disrupted locomotor performance, increased blood pressure, and disrupted stepping. Additional experiments examined the long-term consequences of noxious input, demonstrating that both noxious electrical stimulation and capsaicin impair long-term recovery in female rats. Interestingly, injury had a greater effect on behavioral performance when progesterone and estrogen were low (metestrus). Conversely, nociceptive input led to a greater disruption in locomotor performance and produced a greater rise in blood pressure in animals injured during estrus.
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Affiliation(s)
- Rachel E. Baine
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, Texas, USA
| | - David T. Johnston
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, Texas, USA
| | - Misty M. Strain
- Department of Cellular and Integrative Physiology, University of Texas Health Science, San Antonio, Texas, USA
| | - Melissa K. Henwood
- Department of Neuroscience, Cell Biology, Anatomy, University of Texas Medical Branch, Galveston, Texas, USA
| | - Jacob A. Davis
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, Texas, USA
| | - Joshua A. Reynolds
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, Texas, USA
| | - Erin D. Giles
- Department of Nutrition, Texas A&M University, College Station, Texas, USA
| | - James W. Grau
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, Texas, USA
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24
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Pukale DD, Farrag M, Leipzig ND. Detection of locomotion deficit in a post-traumatic syringomyelia rat model using automated gait analysis technique. PLoS One 2021; 16:e0252559. [PMID: 34762669 PMCID: PMC8584658 DOI: 10.1371/journal.pone.0252559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 10/24/2021] [Indexed: 11/24/2022] Open
Abstract
Syringomyelia (SM) is a spinal cord disorder in which a cyst (syrinx) filled with fluid forms in the spinal cord post-injury/disease, in patients syrinx symptoms include loss of pain and temperature sensation or locomotion deficit. Currently, there are no small animal models and connected tools to help study the functional impacts of SM. The objective of this study was to determine the detectability of subtle locomotion deficits due to syrinx formation/expansion in post-traumatic syringomyelia (PTSM) rat model using the recently reported method of Gait Analysis Instrumentation, and Technology Optimized for Rodents (GAITOR) with Automated Gait Analysis Through Hues and Areas (AGATHA) technique. First videos of the rats were collected while walking in an arena (using GAITOR) followed by extracting meaningful locomotion information from collected videos using AGATHA protocol. PTSM injured rats demonstrated detectable locomotion deficits in terms of duty factor imbalance, paw placement accuracy, step contact width, stride length, and phase dispersion parameters compared to uninjured rats due to SM. We concluded that this technique could detect mild and subtle locomotion deficits associated with PTSM injury, which also in future work could be used further to monitor locomotion responses after different treatment strategies for SM.
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Affiliation(s)
- Dipak D. Pukale
- Department of Chemical, Biomolecular, and Corrosion Engineering, University of Akron, Akron, Ohio, United States of America
| | - Mahmoud Farrag
- Integrated Bioscience Program, University of Akron, Akron, Ohio, United States of America
| | - Nic D. Leipzig
- Department of Chemical, Biomolecular, and Corrosion Engineering, University of Akron, Akron, Ohio, United States of America
- Integrated Bioscience Program, University of Akron, Akron, Ohio, United States of America
- * E-mail:
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25
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Wang X, Li X, Zuo X, Liang Z, Ding T, Li K, Ma Y, Li P, Zhu Z, Ju C, Zhang Z, Song Z, Quan H, Zhang J, Hu X, Wang Z. Photobiomodulation inhibits the activation of neurotoxic microglia and astrocytes by inhibiting Lcn2/JAK2-STAT3 crosstalk after spinal cord injury in male rats. J Neuroinflammation 2021; 18:256. [PMID: 34740378 PMCID: PMC8571847 DOI: 10.1186/s12974-021-02312-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 10/29/2021] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Neurotoxic microglia and astrocytes begin to activate and participate in pathological processes after spinal cord injury (SCI), subsequently causing severe secondary damage and affecting tissue repair. We have previously reported that photobiomodulation (PBM) can promote functional recovery by reducing neuroinflammation after SCI, but little is known about the underlying mechanism. Therefore, we aimed to investigate whether PBM ameliorates neuroinflammation by modulating the activation of microglia and astrocytes after SCI. METHODS Male Sprague-Dawley rats were randomly divided into three groups: a sham control group, an SCI + vehicle group and an SCI + PBM group. PBM was performed for two consecutive weeks after clip-compression SCI models were established. The activation of neurotoxic microglia and astrocytes, the level of tissue apoptosis, the number of motor neurons and the recovery of motor function were evaluated at different days post-injury (1, 3, 7, 14, and 28 days post-injury, dpi). Lipocalin 2 (Lcn2) and Janus kinase-2 (JAK2)-signal transducer and activator of transcription-3 (STAT3) signaling were regarded as potential targets by which PBM affected neurotoxic microglia and astrocytes. In in vitro experiments, primary microglia and astrocytes were irradiated with PBM and cotreated with cucurbitacin I (a JAK2-STAT3 pathway inhibitor), an adenovirus (shRNA-Lcn2) and recombinant Lcn2 protein. RESULTS PBM promoted the recovery of motor function, inhibited the activation of neurotoxic microglia and astrocytes, alleviated neuroinflammation and tissue apoptosis, and increased the number of neurons retained after SCI. The upregulation of Lcn2 and the activation of the JAK2-STAT3 pathway after SCI were suppressed by PBM. In vitro experiments also showed that Lcn2 and JAK2-STAT3 were mutually promoted and that PBM interfered with this interaction, inhibiting the activation of microglia and astrocytes. CONCLUSION Lcn2/JAK2-STAT3 crosstalk is involved in the activation of neurotoxic microglia and astrocytes after SCI, and this process can be suppressed by PBM.
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Affiliation(s)
- Xuankang Wang
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Xin Li
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China.,967 Hospital of People's Liberation Army Joint Logistic Support Force, Dalian, 116044, Liaoning, China
| | - Xiaoshuang Zuo
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Zhuowen Liang
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Tan Ding
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Kun Li
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Yangguang Ma
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Penghui Li
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Zhijie Zhu
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Cheng Ju
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Zhihao Zhang
- 967 Hospital of People's Liberation Army Joint Logistic Support Force, Dalian, 116044, Liaoning, China
| | - Zhiwen Song
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Huilin Quan
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Jiawei Zhang
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China
| | - Xueyu Hu
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China.
| | - Zhe Wang
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shaanxi, China.
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26
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Pitzer C, Kurpiers B, Eltokhi A. Gait performance of adolescent mice assessed by the CatWalk XT depends on age, strain and sex and correlates with speed and body weight. Sci Rep 2021; 11:21372. [PMID: 34725364 PMCID: PMC8560926 DOI: 10.1038/s41598-021-00625-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 10/06/2021] [Indexed: 11/17/2022] Open
Abstract
The automatization of behavioral tests assessing motor activity in rodent models is important for providing robust and reproducible results and evaluating new therapeutics. The CatWalk system is an observer-independent, automated and computerized technique for the assessment of gait performance in rodents. This method has previously been used in adult rodent models of CNS-based movement disorders such as Parkinson's and Huntington's diseases. As motor and gait abnormalities in neuropsychiatric disorders are observed during infancy and adolescence, it became important to validate the CatWalk XT in the gait analysis of adolescent mice and unravel factors that may cause variations in gait performance. Three adolescent wild-type inbred mouse strains, C57BL/6N, DBA/2 and FVB/N, were tested using the CatWalk XT (Version 10.6) for suitable detection settings to characterize several gait parameters at P32 and P42. The same detection settings being suitable for C57BL/6N and DBA/2 mice allowed a direct comparison between the two strains. On the other hand, due to their increased body weight and size, FVB/N mice required different detection settings. The CatWalk XT reliably measured the temporal, spatial, and interlimb coordination parameters in the investigated strains during adolescence. Additionally, significant effects of sex, development, speed and body weight within each strain confirmed the sensitivity of motor and gait functions to these factors. The CatWalk gait analysis of rodents during adolescence, taking the effect of age, strain, sex, speed and body weight into consideration, will decrease intra-laboratory discrepancies and increase the face validity of rodent models of neuropsychiatric disorders.
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Affiliation(s)
- Claudia Pitzer
- Interdisciplinary Neurobehavioral Core, Heidelberg University, Heidelberg, Germany.
| | - Barbara Kurpiers
- Interdisciplinary Neurobehavioral Core, Heidelberg University, Heidelberg, Germany
| | - Ahmed Eltokhi
- Department of Pharmacology, University of Washington, Seattle, USA.
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27
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Qingfeng Wang, Yongfeng Tao. Monosialoganglioside (GM1) Attenuates Spinal Cord Injury-Induced Inflammation by Inhibiting TLR4/NF-κB Pathway. NEUROCHEM J+ 2021. [DOI: 10.1134/s181971242102015x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Stewart AN, Lowe JL, Glaser EP, Mott CA, Shahidehpour RK, McFarlane KE, Bailey WM, Zhang B, Gensel JC. Acute inflammatory profiles differ with sex and age after spinal cord injury. J Neuroinflammation 2021; 18:113. [PMID: 33985529 PMCID: PMC8120918 DOI: 10.1186/s12974-021-02161-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/29/2021] [Indexed: 01/05/2023] Open
Abstract
Background Sex and age are emerging as influential variables that affect spinal cord injury (SCI) recovery. Despite a changing demographic towards older age at the time of SCI, the effects of sex or age on inflammation remain to be elucidated. This study determined the sex- and age-dependency of the innate immune response acutely after SCI. Methods Male and female mice of ages 4- and 14-month-old received T9 contusion SCI and the proportion of microglia, monocyte-derived macrophages (MDM), and neutrophils surrounding the lesion were determined at 3- and 7-day post-injury (DPI) using flow cytometry. Cell counts of microglia and MDMs were obtained using immunohistochemistry to verify flow cytometry results at 3-DPI. Microglia and MDMs were separately isolated using fluorescence-activated cell sorting (FACS) at 3-day post-injury (DPI) to assess RNA expression of 27 genes associated with activation, redox, and debris metabolism/clearance. Results Flow cytometry revealed that being female and older at the time of injury significantly increased MDMs relative to other phagocytes, specifically increasing the ratio of MDMs to microglia at 3-DPI. Cell counts using immunohistochemistry revealed that male mice have more total microglia within SCI lesions that can account for a lower MDM/microglia ratio. With NanoString analyses of 27 genes, only 1 was differentially expressed between sexes in MDMs; specifically, complement protein C1qa was increased in males. No genes were affected by age in MDMs. Only 2 genes were differentially regulated in microglia between sexes after controlling for false discovery rate, specifically CYBB (NOX2) as a reactive oxygen species (ROS)-associated marker as well as MRC1 (CD206), a gene associated with reparative phenotypes. Both genes were increased in female microglia. No microglial genes were differentially regulated between ages. Differences between microglia and MDMs were found in 26 of 27 genes analyzed, all expressed higher in MDMs with three exceptions. Specifically, C1qa, cPLA2, and CD86 were expressed higher in microglia. Conclusions These findings indicate that inflammatory responses to SCI are sex-dependent at both the level of cellular recruitment and gene expression. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-021-02161-8.
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Affiliation(s)
- Andrew N Stewart
- Department of Physiology, Spinal Cord and Brain Injury Research Center, University of Kentucky College of Medicine, Lexington, KY, 40536, USA
| | - John L Lowe
- Department of Physiology, Spinal Cord and Brain Injury Research Center, University of Kentucky College of Medicine, Lexington, KY, 40536, USA.,Science Honors Program of Georgetown College, Georgetown, KY, 40324, USA
| | - Ethan P Glaser
- Department of Physiology, Spinal Cord and Brain Injury Research Center, University of Kentucky College of Medicine, Lexington, KY, 40536, USA
| | - Caitlin A Mott
- Department of Physiology, Spinal Cord and Brain Injury Research Center, University of Kentucky College of Medicine, Lexington, KY, 40536, USA
| | - Ryan K Shahidehpour
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, University of Kentucky College of Medicine, Lexington, KY, 40536, USA
| | - Katelyn E McFarlane
- Department of Physiology, Spinal Cord and Brain Injury Research Center, University of Kentucky College of Medicine, Lexington, KY, 40536, USA
| | - William M Bailey
- Department of Physiology, Spinal Cord and Brain Injury Research Center, University of Kentucky College of Medicine, Lexington, KY, 40536, USA
| | - Bei Zhang
- Department of Physiology, Spinal Cord and Brain Injury Research Center, University of Kentucky College of Medicine, Lexington, KY, 40536, USA.,Present address: Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - John C Gensel
- Department of Physiology, Spinal Cord and Brain Injury Research Center, University of Kentucky College of Medicine, Lexington, KY, 40536, USA.
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29
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Combination of Defined CatWalk Gait Parameters for Predictive Locomotion Recovery in Experimental Spinal Cord Injury Rat Models. eNeuro 2021; 8:ENEURO.0497-20.2021. [PMID: 33593735 PMCID: PMC7986542 DOI: 10.1523/eneuro.0497-20.2021] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 01/18/2021] [Accepted: 01/24/2021] [Indexed: 12/27/2022] Open
Abstract
In many preclinical spinal cord injury (SCI) studies, assessment of locomotion recovery is key to understanding the effectiveness of the experimental intervention. In such rat SCI studies, the most basic locomotor recovery scoring system is a subjective observation of animals freely roaming in an open field, the Basso Beattie Bresnahan (BBB) score. In comparison, CatWalk is an automated gait analysis system, providing further parameter specifications. Although together the CatWalk parameters encompass gait, studies consistently report single parameters, which differ in significance from other behavioral assessments. Therefore, we believe no single parameter produced by the CatWalk can represent the fully-coordinated motion of gait. Typically, other locomotor assessments, such as the BBB score, combine several locomotor characteristics into a representative score. For this reason, we ranked the most distinctive CatWalk parameters between uninjured and SC injured rats. Subsequently, we combined nine of the topmost parameters into an SCI gait index score based on linear discriminant analysis (LDA). The resulting combination was applied to assess gait recovery in SCI experiments comprising of three thoracic contusions, a thoracic dorsal hemisection, and a cervical dorsal column lesion model. For thoracic lesions, our unbiased machine learning model revealed gait differences in lesion type and severity. In some instances, our LDA was found to be more sensitive in differentiating recovery than the BBB score alone. We believe the newly developed gait parameter combination presented here should be used in CatWalk gait recovery work with preclinical thoracic rat SCI models.
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30
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Li Y, Ritzel RM, Khan N, Cao T, He J, Lei Z, Matyas JJ, Sabirzhanov B, Liu S, Li H, Stoica BA, Loane DJ, Faden AI, Wu J. Delayed microglial depletion after spinal cord injury reduces chronic inflammation and neurodegeneration in the brain and improves neurological recovery in male mice. Am J Cancer Res 2020; 10:11376-11403. [PMID: 33052221 PMCID: PMC7545988 DOI: 10.7150/thno.49199] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 09/02/2020] [Indexed: 12/15/2022] Open
Abstract
Neuropsychological deficits, including impairments in learning and memory, occur after spinal cord injury (SCI). In experimental SCI models, we and others have reported that such changes reflect sustained microglia activation in the brain that is associated with progressive neurodegeneration. In the present study, we examined the effect of pharmacological depletion of microglia on posttraumatic cognition, depressive-like behavior, and brain pathology after SCI in mice. Methods: Young adult male C57BL/6 mice were subjected to moderate/severe thoracic spinal cord contusion. Microglial depletion was induced with the colony-stimulating factor 1 receptor (CSF1R) antagonist PLX5622 administered starting either 3 weeks before injury or one day post-injury and continuing through 6 weeks after SCI. Neuroinflammation in the injured spinal cord and brain was assessed using flow cytometry and NanoString technology. Neurological function was evaluated using a battery of neurobehavioral tests including motor function, cognition, and depression. Lesion volume and neuronal counts were quantified by unbiased stereology. Results: Flow cytometry analysis demonstrated that PLX5622 pre-treatment significantly reduced the number of microglia, as well as infiltrating monocytes and neutrophils, and decreased reactive oxygen species production in these cells from injured spinal cord at 2-days post-injury. Post-injury PLX5622 treatment reduced both CD45int microglia and CD45hi myeloid counts at 7-days. Following six weeks of PLX5622 treatment, there were substantial changes in the spinal cord and brain transcriptomes, including those involved in neuroinflammation. These alterations were associated with improved neuronal survival in the brain and neurological recovery. Conclusion: These findings indicate that pharmacological microglia-deletion reduces neuroinflammation in the injured spinal cord and brain, improving recovery of cognition, depressive-like behavior, and motor function.
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31
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Cheng X, Xu J, Yu Z, Xu J, Long H. LncRNA Xist Contributes to Endogenous Neurological Repair After Chronic Compressive Spinal Cord Injury by Promoting Angiogenesis Through the miR-32-5p/Notch-1 Axis. Front Cell Dev Biol 2020; 8:744. [PMID: 32850853 PMCID: PMC7423840 DOI: 10.3389/fcell.2020.00744] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 07/16/2020] [Indexed: 12/16/2022] Open
Abstract
Endogenous repair after chronic compressive spinal cord injury (CCSCI) is of great clinical interest. Ischemia-hypoxia-induced angiogenesis has been proposed to play an important role during this repair process. Emerging evidence indicates that long non-coding RNAs (lncRNAs) are involved in the pathophysiological processes of various diseases. Here, we identified a lncRNA (Xist; X-inactive specific transcript) with upregulated expression in cervical spine lesions during endogenous neurological repair in CCSCI rats. Therapeutically, the introduction of Xist to rats increased neurological function in vivo as assayed using the Basso, Beattie, and Bresnahan (BBB) score and inclined plane test (IPT). We found that the introduction of Xist enhanced endogenous neurological repair by promoting angiogenesis and microvessel density after CCSCI, while depletion of Xist inhibited angiogenesis and cell sprouting and migration. Mechanistically, Xist promoted angiogenesis by sponging miR-32-5p and modulating Notch-1 expression both in vitro and in vivo. These findings suggest a role of the Xist/miR-32-5p/Notch-1 axis in endogenous repair and provide a potential molecular target for the treatment of ischemia-related central nervous system (CNS) diseases.
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Affiliation(s)
- Xing Cheng
- Department of Spine Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jin Xu
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Zhengran Yu
- Department of Spine Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jinghui Xu
- Department of Spine Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Houqing Long
- Department of Spine Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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32
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Stewart AN, MacLean SM, Stromberg AJ, Whelan JP, Bailey WM, Gensel JC, Wilson ME. Considerations for Studying Sex as a Biological Variable in Spinal Cord Injury. Front Neurol 2020; 11:802. [PMID: 32849242 PMCID: PMC7419700 DOI: 10.3389/fneur.2020.00802] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 06/26/2020] [Indexed: 12/13/2022] Open
Abstract
In response to NIH initiatives to investigate sex as a biological variable in preclinical animal studies, researchers have increased their focus on male and female differences in neurotrauma. Inclusion of both sexes when modeling neurotrauma is leading to the identification of novel areas for therapeutic and scientific exploitation. Here, we review the organizational and activational effects of sex hormones on recovery from injury and how these changes impact the long-term health of spinal cord injury (SCI) patients. When determining how sex affects SCI it remains imperative to expand outcomes beyond locomotor recovery and consider other complications plaguing the quality of life of patients with SCI. Interestingly, the SCI field predominately utilizes female rodents for basic science research which contrasts most other male-biased research fields. We discuss the unique caveats this creates to the translatability of preclinical research in the SCI field. We also review current clinical and preclinical data examining sex as biological variable in SCI. Further, we report how technical considerations such as housing, size, care management, and age, confound the interpretation of sex-specific effects in animal studies of SCI. We have uncovered novel findings regarding how age differentially affects mortality and injury-induced anemia in males and females after SCI, and further identified estrus cycle dysfunction in mice after injury. Emerging concepts underlying sexually dimorphic responses to therapy are also discussed. Through a combination of literature review and primary research observations we present a practical guide for considering and incorporating sex as biological variable in preclinical neurotrauma studies.
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Affiliation(s)
- Andrew N Stewart
- Department of Physiology, University of Kentucky, Lexington, KY, United States.,Spinal Cord and Brain Injury Research Center, College of Medicine, University of Kentucky, Lexington, KY, United States
| | - Steven M MacLean
- Department of Physiology, University of Kentucky, Lexington, KY, United States.,Spinal Cord and Brain Injury Research Center, College of Medicine, University of Kentucky, Lexington, KY, United States
| | - Arnold J Stromberg
- Department of Statistics, College of Arts and Sciences, University of Kentucky, Lexington, KY, United States
| | - Jessica P Whelan
- Department of Physiology, University of Kentucky, Lexington, KY, United States.,Spinal Cord and Brain Injury Research Center, College of Medicine, University of Kentucky, Lexington, KY, United States
| | - William M Bailey
- Department of Physiology, University of Kentucky, Lexington, KY, United States.,Spinal Cord and Brain Injury Research Center, College of Medicine, University of Kentucky, Lexington, KY, United States
| | - John C Gensel
- Department of Physiology, University of Kentucky, Lexington, KY, United States.,Spinal Cord and Brain Injury Research Center, College of Medicine, University of Kentucky, Lexington, KY, United States
| | - Melinda E Wilson
- Department of Physiology, University of Kentucky, Lexington, KY, United States
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33
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Pukos N, McTigue DM. Delayed short-term tamoxifen treatment does not promote remyelination or neuron sparing after spinal cord injury. PLoS One 2020; 15:e0235232. [PMID: 32735618 PMCID: PMC7394399 DOI: 10.1371/journal.pone.0235232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 06/10/2020] [Indexed: 12/18/2022] Open
Abstract
The tamoxifen-dependent Cre/lox system in transgenic mice has become an important research tool across all scientific disciplines for manipulating gene expression in specific cell types. In these mouse models, Cre-recombination is not induced until tamoxifen is administered, which allows researchers to have temporal control of genetic modifications. Interestingly, tamoxifen has been identified as a potential therapy for spinal cord injury (SCI) and traumatic brain injury patients due to its neuroprotective properties. It is also reparative in that it stimulates oligodendrocyte differentiation and remyelination after toxin-induced demyelination. However, it is unknown whether tamoxifen is neuroprotective and neuroreparative when administration is delayed after SCI. To properly interpret data from transgenic mice in which tamoxifen treatment is delayed after SCI, it is necessary to identify the effects of tamoxifen alone on anatomical and functional recovery. In this study, female and male mice received a moderate mid-thoracic spinal cord contusion. Mice were then gavaged with corn oil or a high dose of tamoxifen from 19-22 days post-injury, and sacrificed 42 days post-injury. All mice underwent behavioral testing for the duration of the study, which revealed that tamoxifen treatment did not impact hindlimb motor recovery. Similarly, histological analyses revealed that tamoxifen had no effect on white matter sparing, total axon number, axon sprouting, glial reactivity, cell proliferation, oligodendrocyte number, or myelination, but tamoxifen did decrease the number of neurons in the dorsal and ventral horn. Semi-thin sections confirmed that axon demyelination and remyelination were unaffected by tamoxifen. Sex-specific responses to tamoxifen were also assessed, and there were no significant differences between female and male mice. These data suggest that delayed tamoxifen administration after SCI does not change functional recovery or improve tissue sparing in female or male mice.
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Affiliation(s)
- Nicole Pukos
- Neuroscience Graduate Program, The Ohio State University, Columbus, OH, United States of America
- Belford Center for Spinal Cord Injury, The Ohio State University, Columbus, OH, United States of America
| | - Dana M. McTigue
- Belford Center for Spinal Cord Injury, The Ohio State University, Columbus, OH, United States of America
- Department of Neuroscience, Wexner Medical Center, Ohio State University, Columbus, OH, United States of America
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Fukutoku T, Kumagai G, Fujita T, Sasaki A, Wada K, Liu X, Tanaka T, Kudo H, Asari T, Nikaido Y, Ueno S, Ishibashi Y. Sex-Related Differences in Anxiety and Functional Recovery after Spinal Cord Injury in Mice. J Neurotrauma 2020; 37:2235-2243. [PMID: 32486893 DOI: 10.1089/neu.2019.6929] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
It has been reported that female rats have a sex-related advantage in functional recovery and neuroprotection after spinal cord injury (SCI). However, the association between anxiety and neurological function after SCI in female and male rats remains unclear. The aim of this study was to examine sex-related differences in anxiety and neurological dysfunction after SCI in adult C57/BL6 male and female mice. After laminectomy at the 10th thoracic level, a contusive SCI was induced. The sham group received only a T10 laminectomy. Behavior testing (anxiety, motor/sensory function) was performed for 6 weeks after SCI. The spinal cord and preserved myelinated areas at the epicenter were histologically evaluated. Correlations between anxiety and motor/sensory function or histological parameters were analyzed using the Spearman correlation coefficient. Female and male mice showed significantly higher anxiety-like behaviors after SCI than before SCI. Anxiousness was significantly higher in female mice than in male mice after SCI. There was no significant difference in motor/sensory functions and histological features between the two groups. Anxiety-like behaviors were significantly correlated with sensory function at 2 weeks after SCI in female mice and with motor function at 2, 4, and 6 weeks after SCI in male mice. Anxiety-like behaviors were not significantly correlated with the spinal cord area at the epicenter in female and male mice. Our results revealed that female mice became more anxious than male mice after SCI. Anxiety-like behavior after SCI may be associated with functional recovery, and improving anxiety may affect functional recovery after injury.
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Affiliation(s)
- Tatsuhiro Fukutoku
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Gentaro Kumagai
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Taku Fujita
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Ayako Sasaki
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Kanichiro Wada
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Xizhe Liu
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Toshihiro Tanaka
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Hitoshi Kudo
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Toru Asari
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Yoshikazu Nikaido
- Department of Neurophysiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan.,Department of Anesthesiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Shinya Ueno
- Department of Neurophysiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Yasuyuki Ishibashi
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
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35
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McFarlane K, Otto TE, Bailey WM, Veldhorst AK, Donahue RR, Taylor BK, Gensel JC. Effect of Sex on Motor Function, Lesion Size, and Neuropathic Pain after Contusion Spinal Cord Injury in Mice. J Neurotrauma 2020; 37:1983-1990. [PMID: 32597310 PMCID: PMC7470221 DOI: 10.1089/neu.2019.6931] [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] [Indexed: 12/31/2022] Open
Abstract
Spinal cord injury (SCI) causes neurodegeneration, impairs locomotor function, and impacts the quality of life particularly in those individuals in whom neuropathic pain develops. Whether the time course of neurodegeneration, locomotor impairment, or neuropathic pain varies with sex, however, remains understudied. Therefore, the objective of this study in male and female C57BL/6 mice was to evaluate the following outcomes for six weeks after a 75-kdyn thoracic contusion SCI: locomotor function using the Basso Mouse Scale (BMS); spinal cord tissue sparing and rostral-caudal lesion length; and mechanical allodynia and heat hyperalgesia using hindpaw application of Von Frey filaments or radiant heat stimuli, respectively. Although motor function was largely similar between sexes, all of the males, but only half of the females, recovered plantar stepping. Rostral-caudal lesion length was shorter in females than in males. Mechanical allodynia and heat hyperalgesia after SCI developed in all animals, regardless of sex; there were no differences in pain outcomes between sexes. We conclude that contusion SCI yields subtle sex differences in mice depending on the outcome measure but no significant differences in behavioral signs of neuropathic pain.
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Affiliation(s)
- Katelyn McFarlane
- Spinal Cord and Brain Injury Research Center and Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | - Taylor E Otto
- Spinal Cord and Brain Injury Research Center and Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | - William M Bailey
- Spinal Cord and Brain Injury Research Center and Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | - Amy K Veldhorst
- Spinal Cord and Brain Injury Research Center and Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | - Renée R Donahue
- Spinal Cord and Brain Injury Research Center and Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | - Bradley K Taylor
- Department of Anesthesia and Perioperative Medicine, Pittsburgh Center for Pain Research, and Pittsburgh Project to End Opioid Misuse, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - John C Gensel
- Spinal Cord and Brain Injury Research Center and Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky, USA
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Ghnenis AB, Burns DT, Osimanjiang W, He G, Bushman JS. A Long-Term Pilot Study on Sex and Spinal Cord Injury Shows Sexual Dimorphism in Functional Recovery and Cardio-Metabolic Responses. Sci Rep 2020; 10:2762. [PMID: 32066802 PMCID: PMC7026076 DOI: 10.1038/s41598-020-59628-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 01/28/2020] [Indexed: 12/25/2022] Open
Abstract
More than a quarter of a million individuals in the US live with spinal cord injury (SCI). SCI disrupts neural circuitry to vital organs in the body. Despite severe incidences of long-term peripheral complications from SCI, the cardio-metabolic consequences and divergences in sex-related responses are not well described. We examined the effects of SCI on functional recovery, cardiac structure and function, body composition, and glucose metabolism on adult female and male Sprague Dawley (SD) rats. SCI was induced at T10 via contusion. Measured outcomes include behavioral assessment, body weight, dual-energy X-ray absorptiometry (DEXA) for body composition, echocardiography for cardiac structure and function, intraperitoneal glucose tolerance test (IPGTT) for glucose metabolism, insulin tolerance test (ITT), and histology of cardiac structure at the endpoint. There was a decrease in body fat percentage in both sexes, with SCI females disproportionately affected in percent body fat change. Left ventricular internal diameter during systole (LVIDs) was decreased in SCI females more than in SCI males. No significant differences in glucose metabolism were observed up to 20 weeks post-injury (PI). These data show significant cardio-metabolic differences as a consequence of SCI and, furthermore, that sex is an underlying factor in these differences.
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Affiliation(s)
- Adel B Ghnenis
- University of Wyoming School of Pharmacy, 1000 East University Avenue, Department 3375, Laramie, WY, 82071, USA
| | - Daniel T Burns
- University of Wyoming School of Pharmacy, 1000 East University Avenue, Department 3375, Laramie, WY, 82071, USA
| | - Wupu Osimanjiang
- University of Wyoming School of Pharmacy, 1000 East University Avenue, Department 3375, Laramie, WY, 82071, USA
| | - Guanglong He
- University of Wyoming School of Pharmacy, 1000 East University Avenue, Department 3375, Laramie, WY, 82071, USA
| | - Jared S Bushman
- University of Wyoming School of Pharmacy, 1000 East University Avenue, Department 3375, Laramie, WY, 82071, USA.
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Qian K, Xu TY, Wang X, Ma T, Zhang KX, Yang K, Qian TD, Shi J, Li LX, Wang Z. Effects of neural stem cell transplantation on the motor function of rats with contusion spinal cord injuries: a meta-analysis. Neural Regen Res 2020; 15:748-758. [PMID: 31638100 PMCID: PMC6975148 DOI: 10.4103/1673-5374.266915] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Objective To judge the efficacies of neural stem cell (NSC) transplantation on functional recovery following contusion spinal cord injuries (SCIs). Data sources Studies in which NSCs were transplanted into a clinically relevant, standardized rat model of contusion SCI were identified by searching the PubMed, Embase and Cochrane databases, and the extracted data were analyzed by Stata 14.0. Data selection Inclusion criteria were that NSCs were used in in vivo animal studies to treat contusion SCIs and that behavioral assessment of locomotor functional recovery was performed using the Basso, Beattie, and Bresnahan lo-comotor rating scale. Exclusion criteria included a follow-up of less than 4 weeks and the lack of control groups. Outcome measures The restoration of motor function was assessed by the Basso, Beattie, and Bresnahan locomotor rating scale. Results We identified 1756 non-duplicated papers by searching the aforementioned electronic databases, and 30 full-text articles met the inclusion criteria. A total of 37 studies reported in the 30 articles were included in the meta-analysis. The meta-analysis results showed that transplanted NSCs could improve the motor function recovery of rats following contusion SCIs, to a moderate extent (pooled standardized mean difference (SMD) = 0.73; 95% confidence interval (CI): 0.47-1.00; P < 0.001). NSCs obtained from different donor species (rat: SMD = 0.74; 95% CI: 0.36-1.13; human: SMD = 0.78; 95% CI: 0.31-1.25), at different donor ages (fetal: SMD = 0.67; 95% CI: 0.43-0.92; adult: SMD = 0.86; 95% CI: 0.50-1.22) and from different origins (brain-derived: SMD = 0.59; 95% CI: 0.27-0.91; spinal cord-derived: SMD = 0.51; 95% CI: 0.22-0.79) had similar efficacies on improved functional recovery; however, adult induced pluripotent stem cell-derived NSCs showed no significant efficacies. Furthermore, the use of higher doses of transplanted NSCs or the administration of immunosuppressive agents did not promote better locomotor function recovery (SMD = 0.45; 95% CI: 0.21-0.70). However, shorter periods between the contusion induction and the NSC transplantation showed slightly higher efficacies (acute: SMD = 1.22; 95% CI: 0.81-1.63; subacute: SMD = 0.75; 95% CI: 0.42-1.09). For chronic injuries, NSC implantation did not significantly improve functional recovery (SMD = 0.25; 95% CI: -0.16 to 0.65). Conclusion NSC transplantation alone appears to be a positive yet limited method for the treatment of contusion SCIs.
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Affiliation(s)
- Kai Qian
- Department of Neurosurgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Tuo-Ye Xu
- Department of Neurosurgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Xi Wang
- Department of Intensive Care Unit, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Tao Ma
- Department of Neurosurgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing; Department of Neurosurgery, the Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu Province, China
| | - Kai-Xin Zhang
- Department of Neurosurgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province; Department of Neurosurgery, Huangshan City People's Hospital, Huangshan, Anhui Province, China
| | - Kun Yang
- Department of Neurosurgery, the First Affiliated Hospital of Nanjing Medical University; Department of Neurosurgery, Nanjing Brain Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Teng-Da Qian
- Department of Neurosurgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing; Department of Neurosurgery, Jintan Hospital Affiliated to Jiangsu University, Jintan, Jiangsu Province, China
| | - Jing Shi
- Department of Neurosurgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Li-Xin Li
- Department of Neurosurgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Zheng Wang
- Department of Gerontology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
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Sabirzhanov B, Matyas J, Coll-Miro M, Yu LL, Faden AI, Stoica BA, Wu J. Inhibition of microRNA-711 limits angiopoietin-1 and Akt changes, tissue damage, and motor dysfunction after contusive spinal cord injury in mice. Cell Death Dis 2019; 10:839. [PMID: 31685802 PMCID: PMC6828685 DOI: 10.1038/s41419-019-2079-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 10/09/2019] [Accepted: 10/18/2019] [Indexed: 02/06/2023]
Abstract
Spinal cord injury (SCI) causes neuronal cell death and vascular damage, which contribute to neurological dysfunction. Given that many biochemical changes contribute to such secondary injury, treatment approaches have increasingly focused on combined therapies or use of multi-functional drugs. MicroRNAs (miRs) are small (20-23 nucleotide), non-protein-coding RNAs and can negatively regulate target gene expression at the post-transcriptional level. As individual miRs can potentially modulate expression of multiple relevant proteins after injury, they are attractive candidates as upstream regulators of the secondary SCI progression. In the present study we examined the role of miR-711 modulation after SCI. Levels of miR-711 were increased in injured spinal cord early after SCI, accompanied by rapid downregulation of its target angiopoietin-1 (Ang-1), an endothelial growth factor. Changes of miR-711 were also associated with downregulation of the pro-survival protein Akt (protein kinase B), another target of miR-711, with sequential activation of glycogen synthase kinase 3 and the pro-apoptotic BH3-only molecule PUMA. Central administration of a miR-711 hairpin inhibitor after SCI limited decreases of Ang-1/Akt expression and attenuated apoptotic pathways. Such treatment also reduced neuronal/axonal damage, protected microvasculature and improved motor dysfunction following SCI. In vitro, miR-711 levels were rapidly elevated by neuronal insults, but not by activated microglia and astrocytes. Together, our data suggest that post-traumatic miR-711 elevation contributes to neuronal cell death after SCI, in part by inhibiting Ang-1 and Akt pathways, and may serve as a novel therapeutic target.
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Affiliation(s)
- Boris Sabirzhanov
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), School of Medicine, Baltimore, MD, USA
| | - Jessica Matyas
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), School of Medicine, Baltimore, MD, USA
| | - Marina Coll-Miro
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), School of Medicine, Baltimore, MD, USA
| | - Laina Lijia Yu
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), School of Medicine, Baltimore, MD, USA
| | - Alan I Faden
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), School of Medicine, Baltimore, MD, USA.,University of Maryland Center to Advance Chronic Pain Research, University of Maryland Baltimore, Baltimore, MD, 21201, USA
| | - Bogdan A Stoica
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), School of Medicine, Baltimore, MD, USA
| | - Junfang Wu
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), School of Medicine, Baltimore, MD, USA. .,University of Maryland Center to Advance Chronic Pain Research, University of Maryland Baltimore, Baltimore, MD, 21201, USA.
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Subbarayan R, Barathidasan R, Raja STK, Arumugam G, Kuruvilla S, Shanthi P, Ranga Rao S. Human gingival derived neuronal cells in the optimized caffeic acid hydrogel for hemitransection spinal cord injury model. J Cell Biochem 2019; 121:2077-2088. [PMID: 31646674 DOI: 10.1002/jcb.29452] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 10/08/2019] [Indexed: 01/17/2023]
Abstract
Spinal cord injury induces scar formation causes axonal damage that leads to the degeneration of axonal function. Still, there is no robust conceptual design to regenerate the damaged axon after spinal injury. Therefore, the present study demonstrates that human gingival derived neuronal stem cells (GNSCs) transplants in the injectable caffeic acid bioconjugated hydrogel (CBGH) helps to bridge the cavity and promote the engraftment and repopulation of transplants in the injured spinal tissue. Our study reports that the bioluminescence imaging in vivo imaging system (IVIS) provides a satisfactory progression in CBGH-GNSCs transplants compare to lesion control and CBGH alone. Immune regulators interleukin-6 (IL-6), tumor necrosis factor-α, neutrophil elastase are decreased, IL-10 is increased. Likewise, immunostaining (TAU/TUJ-1, SOX-2/NeuN, MAP-2/PSD93, NSE, S100b, and GFAP) shown repopulated cells. Also, TRA-1-81 expression confirms the absence of immune rejection in the CBGH-GNSCs transplants. However, locomotor recovery test, gene (IL-6, CASPASE3, p14-ARF, VEGF, LCAM, BDNF, NT3, NGN2, TrKc, FGF2, Sox-2, TUJ-1, MAP-2, Nestin, and NeuN) and protein expression (TAU, TUJ-1, SOX-2 MAP-2, PSD93, NeuN, TRA-1-81, GFAP, TAU, and MBP) shows functional improvements in the CBGH-GNSCs group. Further, GABA and glutamine level demonstrates the new synaptic vesicle formation. Hence, the CBGH scaffold enhances GNSCs transplants to restore the injured spinal tissue.
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Affiliation(s)
- Rajasekaran Subbarayan
- Centre for Regenerative Medicine and Stem Cell Research, Central Research Facility, Sri Ramachandra Medical College and Research Institute, Chennai, India
| | - Rajamani Barathidasan
- Centre for toxicology and Developmental Research (CEFT), Sri Ramachandra Medical College and Research Institute, Chennai, India
| | - Selvaraj T K Raja
- Biological Material Laboratory, Central Leather Research Institute Adyar, Chennai, Tamil Nadu, India
| | - Gnanamani Arumugam
- Biological Material Laboratory, Central Leather Research Institute Adyar, Chennai, Tamil Nadu, India
| | | | - Palanivelu Shanthi
- Department of Pathology, Dr ALM PGIBMS, University of Madras Taramani Campus, Chennai, India
| | - Suresh Ranga Rao
- Department of Periodontology and Implantology, Faculty of Dental Sciences and Centre for Regenerative Medicine and Stem Cell Research, Sri Ramachandra Medical College and Research Institute, Chennai, India
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Sabirzhanov B, Li Y, Coll-Miro M, Matyas JJ, He J, Kumar A, Ward N, Yu J, Faden AI, Wu J. Inhibition of NOX2 signaling limits pain-related behavior and improves motor function in male mice after spinal cord injury: Participation of IL-10/miR-155 pathways. Brain Behav Immun 2019; 80:73-87. [PMID: 30807841 PMCID: PMC6660361 DOI: 10.1016/j.bbi.2019.02.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 01/11/2019] [Accepted: 02/22/2019] [Indexed: 12/19/2022] Open
Abstract
NADPH oxidase (NOX2) is an enzyme that induces reactive oxygen species (ROS) and serves as a switch between the pro-inflammatory and neurorestorative microglial/macrophage phenotypes; such changes play an important role in neuropathic pain and motor dysfunction. Increased NOX2 expression after spinal cord injury (SCI) has been reported, and inhibition of NOX2 improves motor function. However, the underlying mechanisms of NOX2 in post-traumatic pain and motor deficit remain unexplored. In the present study, we report that depletion of NOX2 (NOX2-/-) or inhibition of NOX2 using NOX2ds-tat significantly reduced mechanical/thermal cutaneous hypersensitivity and motor dysfunction after moderate contusion SCI at T10 in male mice. Western blot (WB, 3 mm lesion area) and immunohistochemistry (IHC) showed that SCI elevates NOX2 expression predominantly in microglia/macrophages up to 8 weeks post-injury. Deletion of NOX2 significantly reduced CD11b+/CD45hiF4/80+ macrophage infiltration at 24 h post-injury detected by flow cytometry and 8-OHG+ ROS production at 8 weeks post-injury by IHC in both lesion area and lumbar enlargement. NOX2 deficiency also altered microglial/macrophage pro-inflammatory and anti-inflammatory balance towards the neurorestorative response. WB analysis showed robust increase of Arginase-1 and YM1 proteins in NOX2-/- mice. Furthermore, qPCR analysis showed significant up-regulation of anti-inflammatory cytokine IL-10 levels in NOX2-/- mice, associated with reduced microRNA-155 expression. These findings were confirmed in CD11b+ microglia/macrophages isolated from spinal cord at 3 days post-injury. Taken together, our data suggest an important role for IL-10/miR-155 pathway in regulating NOX2-mediated SCI-dysfunction. Thus, specific targeting of NOX2 may provide an effective strategy for treating neurological dysfunction in SCI patients.
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Affiliation(s)
- Boris Sabirzhanov
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Yun Li
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Marino Coll-Miro
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Jessica J. Matyas
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Junyun He
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Alok Kumar
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Nicole Ward
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Jingwen Yu
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Alan I. Faden
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA.,Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD, 21201 USA,University of Maryland Center to Advance Chronic Pain Research, University of Maryland, Baltimore, MD, 21201 USA
| | - Junfang Wu
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201 USA; Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD 21201 USA; University of Maryland Center to Advance Chronic Pain Research, University of Maryland, Baltimore, MD 21201 USA.
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41
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Gensel JC, Donahue RR, Bailey WM, Taylor BK. Sexual Dimorphism of Pain Control: Analgesic Effects of Pioglitazone and Azithromycin in Chronic Spinal Cord Injury. J Neurotrauma 2019; 36:2372-2376. [PMID: 30618345 PMCID: PMC6648167 DOI: 10.1089/neu.2018.6207] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Central neuropathic pain develops in greater than 75% of individuals suffering a spinal cord injury (SCI). Increasingly, sex is recognized as an important biological variable in the development and treatment of peripheral neuropathic pain, but much less is known about the role of sex in central neuropathic pain and its pharmacological inhibition. To test the hypothesis that efficacy of analgesic therapies differs between males and females in SCI, we used a mouse model of SCI pain to determine the analgesic efficacy of pioglitazone (PIO), U.S. Food and Drug Administration–approved drug for the treatment of diabetes, and azithromycin (AZM), a commonly prescribed macrolide antibiotic with immunomodulatory properties. Male and female mice received moderate-severe T9 contusion SCI (75-kdyn). A robust heat hyperalgesia developed similarly between male and female mice by 4 weeks post-injury and lasted throughout the duration of the study (14 weeks). Three months after SCI, mice were treated with PIO (10 mg/kg, intraperitoneal) or AZM (160 mg/kg, oral). We observed a sex-specific effect of PIO with significant antihyperalgesic effects in females, but not males. In contrast, AZM was effective in both sexes. Our data support the use of PIO and AZM as novel therapies for SCI pain and highlight the importance of considering sex as a biological variable in clinical and experimental SCI pain research.
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Affiliation(s)
- John C Gensel
- 1Spinal Cord and Brain Injury Research Center and Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Renée R Donahue
- 1Spinal Cord and Brain Injury Research Center and Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky
| | - William M Bailey
- 1Spinal Cord and Brain Injury Research Center and Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Bradley K Taylor
- 2Department of Anesthesia and Perioperative Medicine, the Pittsburgh Center for Pain Research, and the Opioid Research Center at the University of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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42
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Walker CL, Fry CME, Wang J, Du X, Zuzzio K, Liu NK, Walker MJ, Xu XM. Functional and Histological Gender Comparison of Age-Matched Rats after Moderate Thoracic Contusive Spinal Cord Injury. J Neurotrauma 2019; 36:1974-1984. [PMID: 30489213 DOI: 10.1089/neu.2018.6233] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Spinal cord injury (SCI) afflicts hundreds of thousands of Americans, and most SCI (∼80%) occurs in males. In experimental animal models, however, many studies used females. Funding agencies like the National Institutes of Health recommend that new proposed studies should include both genders due to variations in gender response to injuries, diseases, and treatments. However, cost and considerations for some animal models, such as SCI, affect investigators in adapting to this recommendation. Research has increased comparing gender effects in various disease and injury models, including SCI. However, most studies use weight-matched animals, which poses issues in comparing results and outcomes. The present study compared histologic and functional outcomes between age-matched male and female Sprague-Dawley rats in a moderate thoracic contusion SCI model. Cresyl violet and eosin staining showed no significant differences in lesion volume between genders after 9 weeks post-SCI (p > 0.05). Luxol fast blue-stained spared myelin was similar between genders, although slightly greater (∼6%) in spared myelin, compared with cord volume (p = 0.044). Glial reactivity and macrophage labeling in the lesion area was comparable between genders, as well. Basso, Beattie, Bresnahan (BBB) functional scores were not significantly different between genders, and Hargreaves thermal hyperalgesia and Gridwalk sensorimotor analyses also were similar between genders, compared with uninjured gender controls. Analysis of covariance showed weight did not influence functional recovery as assessed through BBB (p = 0.65) or Gridwalk assessment (p = 0.63) in this study. In conclusion, our findings suggest age-matched male and female rats recover similarly in a common clinically relevant SCI model.
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Affiliation(s)
- Chandler L Walker
- 1 Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana.,3 Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana.,5 Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, Indiana
| | - Colin M E Fry
- 1 Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana.,2 Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, Indiana.,4 Goodman Campbell Brain and Spine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Junmei Wang
- 5 Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, Indiana
| | - Xiaolong Du
- 1 Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana
| | - Kirstin Zuzzio
- 5 Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, Indiana
| | - Nai-Kui Liu
- 1 Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana.,2 Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, Indiana.,4 Goodman Campbell Brain and Spine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Melissa J Walker
- 1 Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana.,2 Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, Indiana
| | - Xiao-Ming Xu
- 1 Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana.,2 Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, Indiana.,3 Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana.,4 Goodman Campbell Brain and Spine, Indiana University School of Medicine, Indianapolis, Indiana
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Diogo CC, da Costa LM, Pereira JE, Filipe V, Couto PA, Geuna S, Armada-da-Silva PA, Maurício AC, Varejão ASP. Kinematic and kinetic gait analysis to evaluate functional recovery in thoracic spinal cord injured rats. Neurosci Biobehav Rev 2019; 98:18-28. [PMID: 30611796 DOI: 10.1016/j.neubiorev.2018.12.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 11/16/2018] [Accepted: 12/24/2018] [Indexed: 12/29/2022]
Abstract
The recovery of walking function following spinal cord injury (SCI) is of major importance to patients and clinicians. In experimental SCI studies, a rat model is widely used to assess walking function, following thoracic spinal cord lesion. In an effort to provide a resource which investigators can refer to when seeking the most appropriate functional assay, the authors have compiled and categorized the behavioral assessments used to measure the deficits and recovery of the gait in thoracic SCI rats. These categories include kinematic and kinetic measurements. Within this categorization, we discuss the advantages and disadvantages of each type of measurement. The present review includes the type of outcome data that they produce, the technical difficulty and the time required to potentially train the animals to perform them, and the need for expensive or highly specialized equipment. The use of multiple kinematic and kinetic parameters is recommended to identify subtle deficits and processes involved in the compensatory mechanisms of walking function after experimental thoracic SCI in rats.
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Affiliation(s)
- Camila Cardoso Diogo
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, UTAD, Quinta de Prados, 5000-801 Vila Real, Portugal
| | - Luís Maltez da Costa
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, UTAD, Quinta de Prados, 5000-801 Vila Real, Portugal; CECAV, Centre for Animal Sciences and Veterinary Studies, University of Trás-os-Montes e Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal
| | - José Eduardo Pereira
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, UTAD, Quinta de Prados, 5000-801 Vila Real, Portugal; CECAV, Centre for Animal Sciences and Veterinary Studies, University of Trás-os-Montes e Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal
| | - Vítor Filipe
- Department of Engineering, School of Science and Technology, University of Trás-os-Montes e Alto Douro, UTAD, Quinta de Prados, 5000-801 Vila Real, Portugal; INESC TEC, Rua Dr. Roberto Frias, 4200 - 465 Porto, Portugal
| | - Pedro Alexandre Couto
- Department of Engineering, School of Science and Technology, University of Trás-os-Montes e Alto Douro, UTAD, Quinta de Prados, 5000-801 Vila Real, Portugal; CITAB, Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes e Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal
| | - Stefano Geuna
- Department of Clinical and Biological Sciences, University of Turin, Italy
| | - Paulo A Armada-da-Silva
- Faculdade de Motricidade Humana (FMH), Universidade de Lisboa (ULisboa), Estrada da Costa, 1499-002, Dafundo, Cruz Quebrada, Portugal; CIPER-FMH: Centro Interdisciplinar de Estudo de Performance Humana, Faculdade de Motricidade Humana (FMH), Universidade de Lisboa (ULisboa), Estrada da Costa, 1499-002, Cruz Quebrada - Dafundo, Portugal
| | - Ana Colette Maurício
- Department of Veterinary Clinics, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto (UP), Rua de Jorge Viterbo Ferreira, nº 228, 4050-313 Porto, Portugal; Animal Science and Study Centre (CECA), Institute of Sciences, Technologies and Agroenvironment of the University of Porto (ICETA), Rua D. Manuel II, Apartado 55142, 4051-401, Porto, Portugal
| | - Artur S P Varejão
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, UTAD, Quinta de Prados, 5000-801 Vila Real, Portugal; CECAV, Centre for Animal Sciences and Veterinary Studies, University of Trás-os-Montes e Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal.
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Li D, Zhang P, Yao X, Li H, Shen H, Li X, Wu J, Lu X. Exosomes Derived From miR-133b-Modified Mesenchymal Stem Cells Promote Recovery After Spinal Cord Injury. Front Neurosci 2018; 12:845. [PMID: 30524227 PMCID: PMC6262643 DOI: 10.3389/fnins.2018.00845] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 10/29/2018] [Indexed: 12/30/2022] Open
Abstract
Dysregulation of microRNAs (miRNAs) has been found in injured spinal cords after spinal cord injury (SCI). Previous studies have shown that miR-133b plays an important role in the differentiation of neurons and the outgrowth of neurites. Recently, exosomes have been used as novel biological vehicles to transfer miRNAs locally or systemically, but little is known about the effect of the delivery of exosome-mediated miRNAs on the treatment of SCI. In the present study, we observed that mesenchymal stem cells, the most common cell types known to produce exosomes, could package miR-133b into secreted exosomes. After SCI, tail vein injection of miR-133b exosomes into rats significantly improved the recovery of hindlimb function when compared to control groups. Additionally, treatment with miR-133b exosomes reduced the volume of the lesion, preserved neuronal cells, and promoted the regeneration of axons after SCI. We next observed that the expression of RhoA, a direct target of miR-133b, was decreased in the miR-133b exosome group. Moreover, we showed that miR-133b exosomes activated ERK1/2, STAT3, and CREB, which are signaling pathway proteins involved in the survival of neurons and the regeneration of axons. In summary, these findings demonstrated that systemically injecting miR-133b exosomes preserved neurons, promoted the regeneration of axons, and improved the recovery of hindlimb locomotor function following SCI, suggesting that the transfer of exosome-mediated miRNAs represents a novel therapeutic approach for the treatment of SCI.
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Affiliation(s)
- Dong Li
- Department of Neurosurgery, Lianyungang Hospital of Traditional Chinese Medicine, Lianyungang, China
| | - Peng Zhang
- Department of Neurosurgery, Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Xiyang Yao
- Department of Neurosurgery, Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Haiying Li
- Department of Neurosurgery, Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Haitao Shen
- Department of Neurosurgery, Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Xiang Li
- Department of Neurosurgery, Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Jiang Wu
- Department of Neurosurgery, Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Xiaocheng Lu
- Department of Neurosurgery, Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, China
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45
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Khan M, Dhammu TS, Singh I, Singh AK. Amelioration of spinal cord injury in rats by blocking peroxynitrite/calpain activity. BMC Neurosci 2018; 19:50. [PMID: 30103682 PMCID: PMC6090709 DOI: 10.1186/s12868-018-0450-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 08/07/2018] [Indexed: 01/09/2023] Open
Abstract
Background Spinal cord injury (SCI) is one of the leading causes of disability and chronic pain. In SCI-induced pathology, homeostasis of the nitric oxide (NO) metabolome is lost. Major NO metabolites such as S-nitrosoglutathione (GSNO) and peroxynitrite are reported to play pivotal roles in regulating the activities of key cysteine proteases, calpains. While peroxynitrite (a metabolite of NO and superoxide) up regulates the activities of calpains leading to neurodegeneration, GSNO (a metabolite of NO and glutathione) down regulates the activities of calpains leading to neuroprotection. In this study, effect of GSNO on locomotor function and pain threshold and their relationship with the levels of peroxynitrite and the activity of calpain in the injured spinal cord were investigated using a 2-week rat model of contusion SCI.
Results SCI animals were initially treated with GSNO at 2 h after the injury followed by a once daily dose of GSNO for 14 days. Locomotor function was evaluated by “Basso Beattie and Bresnahan (BBB) locomotor rating scale” and pain by mechanical allodynia. Peroxynitrite level, as expression of 3-nitrotyrosine (3-NT), calpain activity, as the degradation products of calpain substrate alpha II spectrin, and nNOS activity, as the expression phospho nNOS, were measured by western blot analysis. Treatment with GSNO improved locomotor function and mitigated pain. The treatment also reduced the levels of peroxynitrite (3-NT) and decreased activity of calpains. Reduced levels of peroxynitrite resulted from the GSNO-mediated inhibition of aberrant activity of neuronal nitric oxide synthase (nNOS). Conclusions The data indicates that higher levels of 3-NT and aberrant activities of nNOS and calpains correlated with SCI pathology and functional deficits. Treatment with GSNO improved locomotor function and mitigated mechanical allodynia acutely post-injury. Because GSNO shows potential to ameliorate experimental SCI, we discuss implications for GSNO therapy in clinical SCI research.
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Affiliation(s)
- Mushfiquddin Khan
- Department of Pediatrics, 508 Children's Research Institute, Medical University of South Carolina, 173 Ashley Ave, Charleston, SC, 29425, USA.
| | - Tajinder S Dhammu
- Department of Pediatrics, 508 Children's Research Institute, Medical University of South Carolina, 173 Ashley Ave, Charleston, SC, 29425, USA
| | - Inderjit Singh
- Department of Pediatrics, 508 Children's Research Institute, Medical University of South Carolina, 173 Ashley Ave, Charleston, SC, 29425, USA.,Ralph H Johnson VA Medical Center, Charleston, SC, USA
| | - Avtar K Singh
- Ralph H Johnson VA Medical Center, Charleston, SC, USA.,Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC, USA
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46
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Fujita T, Kumagai G, Liu X, Wada K, Tanaka T, Kudo H, Asari T, Fukutoku T, Sasaki A, Nitobe Y, Nikaido Y, Furukawa KI, Hirata M, Kanematsu T, Ueno S, Ishibashi Y. Poor Motor-Function Recovery after Spinal Cord Injury in Anxiety-Model Mice with Phospholipase C-Related Catalytically Inactive Protein Type 1 Knockout. J Neurotrauma 2018; 35:1379-1386. [DOI: 10.1089/neu.2017.5492] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Taku Fujita
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Gentaro Kumagai
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Xizhe Liu
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Kanichiro Wada
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Toshihiro Tanaka
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Hitoshi Kudo
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Toru Asari
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Tatsuhiro Fukutoku
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Ayako Sasaki
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Yohshiro Nitobe
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Yoshikazu Nikaido
- Department of Neurophysiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
- Department of Anesthesiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Ken-Ichi Furukawa
- Department of Pharmacology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Masato Hirata
- Laboratory of Molecular and Cellular Biochemistry, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Takashi Kanematsu
- Department of Cellular and Molecular Pharmacology, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Shinya Ueno
- Department of Neurophysiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Yasuyuki Ishibashi
- Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
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47
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O'Connor G, Jeffrey E, Madorma D, Marcillo A, Abreu MT, Deo SK, Dietrich WD, Daunert S. Investigation of Microbiota Alterations and Intestinal Inflammation Post-Spinal Cord Injury in Rat Model. J Neurotrauma 2018; 35:2159-2166. [PMID: 29566601 DOI: 10.1089/neu.2017.5349] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Although there has been a significant amount of research focused on the pathophysiology of spinal cord injury (SCI), there is limited information on the consequences of SCI on remote organs. SCI can produce significant effects on a variety of organ systems, including the gastrointestinal tract. Patients with SCI often suffer from severe, debilitating bowel dysfunction in addition to their physical disabilities, which is of major concern for these individuals because of the adverse impact on their quality of life. Herein, we report on our investigation into the effects of SCI and subsequent antibiotic treatment on the intestinal tissue and microbiota. For that, we used a thoracic SCI rat model and investigated changes to the microbiota, proinflammatory cytokine levels, and bacterial communication molecule levels post-injury and gentamicin treatment for 7 days. We discovered significant changes, the most interesting being the differences in the gut microbiota beta diversity of 8-week SCI animals compared to control animals at the family, genus, and species level. Specifically, 35 operational taxonomic units were enriched in the SCI animal group and three were identified at species level; Lactobacillus intestinalis, Clostridium disporicum, and Bifidobacterium choerinum. In contrast, Clostridium saccharogumia was identified as depleted in the SCI animal group. Proinflammatory cytokines interleukin (IL)-12, macrophage inflammatory protein-2 (MIP-2), and tumor necrosis factor alpha were found to be significantly elevated in intestinal tissue homogenate 4 weeks post-SCI compared to 8-weeks post-injury. Further, levels of IL-1β, IL-12, and MIP-2 significantly correlated with changes in beta diversity 8-weeks post-SCI. Our data provide a greater understanding of the early effects of SCI on the microbiota and gastrointestinal tract, highlighting the need for further investigation to elucidate the mechanism underlying these effects.
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Affiliation(s)
- Gregory O'Connor
- 1 Department of Biochemistry and Molecular Biology, University of Miami , Miller School of Medicine, Miami, Florida
| | - Elisabeth Jeffrey
- 1 Department of Biochemistry and Molecular Biology, University of Miami , Miller School of Medicine, Miami, Florida
| | - Derik Madorma
- 1 Department of Biochemistry and Molecular Biology, University of Miami , Miller School of Medicine, Miami, Florida
| | - Alexander Marcillo
- 2 Miami Project to Cure Paralysis, Department of Neurological Surgery, University of Miami , Miller School of Medicine, Miami, Florida
| | - Maria T Abreu
- 3 Division of Gastroenterology, University of Miami , Miller School of Medicine, Miami, Florida
| | - Sapna K Deo
- 1 Department of Biochemistry and Molecular Biology, University of Miami , Miller School of Medicine, Miami, Florida
| | - W Dalton Dietrich
- 2 Miami Project to Cure Paralysis, Department of Neurological Surgery, University of Miami , Miller School of Medicine, Miami, Florida
| | - Sylvia Daunert
- 1 Department of Biochemistry and Molecular Biology, University of Miami , Miller School of Medicine, Miami, Florida
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48
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Wang L, Shi Q, Dai J, Gu Y, Feng Y, Chen L. Increased vascularization promotes functional recovery in the transected spinal cord rats by implanted vascular endothelial growth factor-targeting collagen scaffold. J Orthop Res 2018; 36:1024-1034. [PMID: 28786500 DOI: 10.1002/jor.23678] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 08/01/2017] [Indexed: 02/04/2023]
Abstract
Spinal cord injury (SCI) is global health concern. The effective strategies for SCI are relevant to the improvement on nerve regeneration microenvironment. Vascular endothelial growth factor (VEGF) is an important cytokine for inducing angiogenesis and accelerating nerve system function recovery from injury. We proposed that VEGF could improve nerve regeneration in SCI. However, an uncontrolled delivery system target to injury site not only decreases the therapeutic efficacy but also increases the risk of tumor information. We implanted collagen scaffold (CS) targeted with a constructed protein, collagen-binding VEGF (CBD-VEGF), to bridge transected spine cord gap in a rat transected SCI model. Functional and histological examinations were conducted to assess the repair capacity of the delivery system CS/CBD-VEGF. The results indicated that the implantation of CS/CBD-VEGF into the model rats improved the survival rate and exerted beneficial effect on functional recovery. The controlled intervention improved the microenvironment, guided axon growth, and promoted neovascularization at the injury site. Therefore, the delivery system with stable binding of VEGF potentially provides a better therapeutic option for SCI. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:1024-1034, 2018.
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Affiliation(s)
- Lingjun Wang
- Department of Orthopedic, The First Affiliated Hospital of Soochow University, Suzhou, 215006, P.R. China
| | - Qin Shi
- Department of Orthopedic, The First Affiliated Hospital of Soochow University, Suzhou, 215006, P.R. China
| | - Jianwu Dai
- State Key Laboratory of Molecular Developmental Biology, Chinese Academy of Sciences, Institute of Genetics and Developmental Biology, Beijing, 100000, P.R. China
| | - Yong Gu
- Department of Orthopedic, The First Affiliated Hospital of Soochow University, Suzhou, 215006, P.R. China
| | - Yu Feng
- Department of Orthopedic, The First Affiliated Hospital of Soochow University, Suzhou, 215006, P.R. China
| | - Liang Chen
- Department of Orthopedic, The First Affiliated Hospital of Soochow University, Suzhou, 215006, P.R. China
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49
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Colón JM, González PA, Cajigas Á, Maldonado WI, Torrado AI, Santiago JM, Salgado IK, Miranda JD. Continuous tamoxifen delivery improves locomotor recovery 6h after spinal cord injury by neuronal and glial mechanisms in male rats. Exp Neurol 2018; 299:109-121. [PMID: 29037533 PMCID: PMC5723542 DOI: 10.1016/j.expneurol.2017.10.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 10/03/2017] [Accepted: 10/05/2017] [Indexed: 12/13/2022]
Abstract
No treatment is available for patients with spinal cord injury (SCI). Patients often arrive to the hospital hours after SCI suggesting the need of a therapy that can be used on a clinically relevant window. Previous studies showed that Tamoxifen (TAM) treatment 24h after SCI benefits locomotor recovery in female rats. Tamoxifen exerts beneficial effects in male and female rodents but a gap of knowledge exists on: the therapeutic window of TAM, the spatio-temporal mechanisms activated and if this response is sexually dimorphic. We hypothesized that TAM will favor locomotor recovery when administered up-to 24h after SCI in male Sprague-Dawley rats. Rats received a thoracic (T10) contusion using the MACSIS impactor followed by placebo or TAM (15mg/21days) pellets in a therapeutic window of 0, 6, 12, or 24h. Animals were sacrificed at 2, 7, 14, 28 or 35days post injury (DPI) to study the molecular and cellular changes in the acute and chronic stages. Immediate or delayed therapy (t=6h) improved locomotor function, increased white matter spared tissue, and neuronal survival. TAM reduced reactive gliosis during chronic stages and increased the expression of Olig-2. A significant difference was observed in estrogen receptor alpha between male and female rodents from 2 to 28 DPI suggesting a sexually dimorphic characteristic that could be related to the behavioral differences observed in the therapeutic window of TAM. This study supports the use of TAM in the SCI setting due to its neuroprotective effects but with a significant sexually dimorphic therapeutic window.
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Affiliation(s)
- Jennifer M Colón
- University of Puerto Rico Medical Sciences Campus, Department of Physiology, San Juan, PR 00936, USA.
| | - Pablo A González
- University of Puerto Rico Medical Sciences Campus, Department of Physiology, San Juan, PR 00936, USA.
| | - Ámbar Cajigas
- University of Puerto Rico Medical Sciences Campus, Department of Physiology, San Juan, PR 00936, USA.
| | - Wanda I Maldonado
- University of Puerto Rico Carolina Campus, Neuroregeneration Division, Neuroscience Research Laboratory, Natural Sciences Department, Carolina, PR 00984, USA.
| | - Aranza I Torrado
- University of Puerto Rico Medical Sciences Campus, Department of Physiology, San Juan, PR 00936, USA.
| | - José M Santiago
- University of Puerto Rico Carolina Campus, Neuroregeneration Division, Neuroscience Research Laboratory, Natural Sciences Department, Carolina, PR 00984, USA.
| | - Iris K Salgado
- University of Puerto Rico Medical Sciences Campus, Department of Physiology, San Juan, PR 00936, USA.
| | - Jorge D Miranda
- University of Puerto Rico Medical Sciences Campus, Department of Physiology, San Juan, PR 00936, USA.
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50
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Mao L, Gao W, Chen S, Song Y, Song C, Zhou Z, Zhao H, Zhou K, Wang W, Zhu K, Liu C, Mei X. Epothilone B impairs functional recovery after spinal cord injury by increasing secretion of macrophage colony-stimulating factor. Cell Death Dis 2017; 8:e3162. [PMID: 29095439 PMCID: PMC5775408 DOI: 10.1038/cddis.2017.542] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 08/30/2017] [Accepted: 09/12/2017] [Indexed: 12/13/2022]
Abstract
The microtubule-stabilizing drug epothilone B (epoB) has shown potential value in the treatment of spinal cord injury (SCI) through diverse mechanisms. However, it remains elusive why a limited overall effect was observed. We aim to investigate the limiting factors underlying functional recovery promoted by epoB. The same SCI model treated by epoB was established as discussed previously. We used a cerebrospinal fluid (CSF) sample to assess the changes in cytokines in milieu of the SCI lesion site after epoB treatment. We then analyzed the source of cytokines, the state of microglia/macrophages/monocytes (M/Ms), and the recruitment of neutrophil in the lesion site by using the results of antibody array. Following these findings, we further evaluated the motor functional recovery caused by the reshaped microenvironment. Systemic administration of epoB significantly increased levels of several cytokines in the CSF of the rat SCI model; macrophage colony-stimulating factor (M-CSF) secreted by intact central nervous system (CNS) cells was one of the cytokines with increased levels. Along with epoB and other cytokines, M-CSF reshapes the SCI milieu by activating the microglias, killing bone marrow-derived macrophages, polarizing the M/M to M1 phenotype, and activating downstream cytokines to exacerbate the SCI injury, but it also increases the expression of neurotrophic factors. Anti-inflammatory therapy using a neutralizing antibody mix shows encouraging results. Using in vivo experiments, our findings indicate that epoB inhibits the SCI functional recovery in many ways by reshaping the milieu, which counteracts the therapeutic efficacy that led to the limited overall effectiveness.
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Affiliation(s)
- Liang Mao
- Department of Oncology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China.,Key Laboratory of Medical Tissue Engineering of Liaoning Province, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China
| | - Wei Gao
- Department of Basic Medical Sciences, Jinzhou Medical University, Jinzhou 121000, People's Republic of China
| | - Shurui Chen
- Jinzhou Medical University, Jinzhou 121000, People's Republic of China
| | - Ying Song
- Key Laboratory of Medical Tissue Engineering of Liaoning Province, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China
| | - Changwei Song
- Key Laboratory of Medical Tissue Engineering of Liaoning Province, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China.,Department of Hand Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China
| | - Zipeng Zhou
- Department of Orthopedic Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China
| | - Haosen Zhao
- Department of Orthopedic Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China
| | - Kang Zhou
- Department of Orthopedic Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China
| | - Wei Wang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China
| | - Kunming Zhu
- Department of Orthopedic Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China
| | - Chang Liu
- Department of Endocrinology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China
| | - Xifan Mei
- Key Laboratory of Medical Tissue Engineering of Liaoning Province, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China.,Department of Orthopedic Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China
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