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Zhang C, Li Y, Yu Y, Li Z, Xu X, Talifu Z, Liu W, Yang D, Gao F, Wei S, Zhang L, Gong H, Peng R, Du L, Li J. Impact of inflammation and Treg cell regulation on neuropathic pain in spinal cord injury: mechanisms and therapeutic prospects. Front Immunol 2024; 15:1334828. [PMID: 38348031 PMCID: PMC10859493 DOI: 10.3389/fimmu.2024.1334828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 01/03/2024] [Indexed: 02/15/2024] Open
Abstract
Spinal cord injury is a severe neurological trauma that can frequently lead to neuropathic pain. During the initial stages following spinal cord injury, inflammation plays a critical role; however, excessive inflammation can exacerbate pain. Regulatory T cells (Treg cells) have a crucial function in regulating inflammation and alleviating neuropathic pain. Treg cells release suppressor cytokines and modulate the function of other immune cells to suppress the inflammatory response. Simultaneously, inflammation impedes Treg cell activity, further intensifying neuropathic pain. Therefore, suppressing the inflammatory response while enhancing Treg cell regulatory function may provide novel therapeutic avenues for treating neuropathic pain resulting from spinal cord injury. This review comprehensively describes the mechanisms underlying the inflammatory response and Treg cell regulation subsequent to spinal cord injury, with a specific focus on exploring the potential mechanisms through which Treg cells regulate neuropathic pain following spinal cord injury. The insights gained from this review aim to provide new concepts and a rationale for the therapeutic prospects and direction of cell therapy in spinal cord injury-related conditions.
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Affiliation(s)
- Chunjia Zhang
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Yan Li
- Institute of Rehabilitation medicine, China Rehabilitation Research Center, Beijing, China
| | - Yan Yu
- Institute of Rehabilitation medicine, China Rehabilitation Research Center, Beijing, China
| | - Zehui Li
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Xin Xu
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Zuliyaer Talifu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences/Peking Union Medical College, Beijing, China
| | - Wubo Liu
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Degang Yang
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Feng Gao
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Song Wei
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Liang Zhang
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Han Gong
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Run Peng
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Liangjie Du
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Jianjun Li
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Institute of Rehabilitation medicine, China Rehabilitation Research Center, Beijing, China
- Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
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Zhou R, Wang L, Chen L, Feng X, Zhou R, Xiang P, Wen J, Huang Y, Zhou H. Bone Marrow-Derived GCA + Immune Cells Drive Alzheimer's Disease Progression. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2303402. [PMID: 37949676 PMCID: PMC10754099 DOI: 10.1002/advs.202303402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 10/17/2023] [Indexed: 11/12/2023]
Abstract
Alzheimer's disease (AD) is an age-related degenerative disease of the central nervous system (CNS), whereas the role of bone marrow immune cells in the pathogenesis of AD remains unclear. Here, the study reveals that compared to matched healthy individuals, AD patients have higher circulating grancalcin (GCA) levels, which negatively correlate with cognitive function. Bone marrow-derived GCA+ immune cells, which secret abundant GCA and increase during aging, preferentially invaded the hippocampus and cortex of AD mouse model in a C-C Motif Chemokine Receptor 10 (CCR10)-dependent manner. Transplanting GCA+ immune cells or direct stereotaxic injection of recombinant GCA protein intensified amyloid plaque load and aggravated cognitive and memory impairments. In contrast, genetic ablation of GCA in the hematopoietic compartment improves cognitive and memory function. Mechanistically, GCA competitively binds to the low-density lipoprotein receptor-related protein 1 (LRP1) in microglia, thus inhibiting phagocytosis and clearance of Aβ and potentiating neuropathological changes. Importantly, GCA-neutralizing antibody treatment rejuvenated cognitive and memory function and constrained AD progression. Together, the study demonstrates a pathological role of GCA+ immune cells instigating cognitive and memory decline, suggesting that GCA+ immune cells can be a potential target for innovative therapeutic strategies in AD.
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Affiliation(s)
- Rui Zhou
- Department of EndocrinologyEndocrinology Research CenterXiangya Hospital of Central South UniversityChangshaHunan410008China
| | - Liwen Wang
- Department of EndocrinologyEndocrinology Research CenterXiangya Hospital of Central South UniversityChangshaHunan410008China
| | - Linyun Chen
- Department of EndocrinologyEndocrinology Research CenterXiangya Hospital of Central South UniversityChangshaHunan410008China
| | - Xu Feng
- Department of EndocrinologyEndocrinology Research CenterXiangya Hospital of Central South UniversityChangshaHunan410008China
| | - Ruoyu Zhou
- Department of EndocrinologyEndocrinology Research CenterXiangya Hospital of Central South UniversityChangshaHunan410008China
| | - Peng Xiang
- Department of EndocrinologyEndocrinology Research CenterXiangya Hospital of Central South UniversityChangshaHunan410008China
| | - Jie Wen
- Department of EndocrinologyEndocrinology Research CenterXiangya Hospital of Central South UniversityChangshaHunan410008China
| | - Yan Huang
- Department of EndocrinologyEndocrinology Research CenterXiangya Hospital of Central South UniversityChangshaHunan410008China
- National Clinical Research Center for Geriatric DisordersXiangya HospitalChangshaHunan410008China
| | - Haiyan Zhou
- Department of EndocrinologyEndocrinology Research CenterXiangya Hospital of Central South UniversityChangshaHunan410008China
- National Clinical Research Center for Geriatric DisordersXiangya HospitalChangshaHunan410008China
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Chen H, Peng H, Wang PC, Zou T, Feng XM, Wan BW. Role of regulatory T cells in spinal cord injury. Eur J Med Res 2023; 28:163. [PMID: 37161548 PMCID: PMC10169350 DOI: 10.1186/s40001-023-01122-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 04/17/2023] [Indexed: 05/11/2023] Open
Abstract
Spinal cord injury is an intricate process involving a series of multi-temporal and multi-component pathological events, among which inflammatory response is the core. Thus, it is crucial to find a way to prevent the damaging effects of the inflammatory response. The research has found that Treg cells can suppress the activation, proliferation, and effector functions of many parenchymal cells by multiple mechanisms. This review discusses how Treg cells regulate the inflammatory cells to promote spinal cord recovery. These parenchymal cells include macrophages/microglia, oligodendrocytes, astrocytes, and others. In addition, we discuss the adverse role of Treg cells, the status of treatment, and the prospects of cell-based therapies after spinal cord injury. In conclusion, this review provides an overview of the regulatory role of Treg cells in spinal cord injury. We hope to offer new insights into the treatment of spinal cord injury.
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Affiliation(s)
- Hao Chen
- Northern Jiangsu People's Hospital Affiliated to Yangzhou University/Clinical Medical College, Yangzhou University, Yangzhou, 225000, China
| | - Hao Peng
- Northern Jiangsu People's Hospital Affiliated to Yangzhou University/Clinical Medical College, Yangzhou University, Yangzhou, 225000, China
| | - Ping-Chuan Wang
- Northern Jiangsu People's Hospital Affiliated to Yangzhou University/Clinical Medical College, Yangzhou University, Yangzhou, 225000, China
| | - Tao Zou
- Northern Jiangsu People's Hospital Affiliated to Yangzhou University/Clinical Medical College, Yangzhou University, Yangzhou, 225000, China
| | - Xin-Min Feng
- Northern Jiangsu People's Hospital Affiliated to Yangzhou University/Clinical Medical College, Yangzhou University, Yangzhou, 225000, China
| | - Bo-Wen Wan
- Northern Jiangsu People's Hospital Affiliated to Yangzhou University/Clinical Medical College, Yangzhou University, Yangzhou, 225000, China.
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Liu R, Li Y, Wang Z, Chen P, Xie Y, Qu W, Wang M, Yu Z, Luo X. Regulatory T cells promote functional recovery after spinal cord injury by alleviating microglia inflammation via STAT3 inhibition. CNS Neurosci Ther 2023. [PMID: 36914969 DOI: 10.1111/cns.14161] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 02/08/2023] [Accepted: 02/24/2023] [Indexed: 03/15/2023] Open
Abstract
BACKGROUND Immediately after spinal trauma, immune cells, and proinflammatory cytokines infiltrate the spinal cord and disrupt the focal microenvironment, which impedes axon regeneration and functional recovery. Previous studies have reported that regulatory T cells (Tregs) enter the central nervous system and exert immunosuppressive effects on microglia during multiple sclerosis and stroke. However, whether and how Tregs interact with microglia and modulate injured microenvironments after spinal cord injury (SCI) remains unknown. METHOD Regulatory T cells spatiotemporal characteristics were analyzed in a mouse contusion SCI model. Microglia activation status was evaluated by immunostaining and RNA sequencing. Cytokine production in injured spinal cord was examined using Luminex. The role of STAT3 in Treg-microglia crosstalk was investigated in a transwell system with isolated Tregs and primary microglia. RESULTS Regulatory T cells infiltration of the spinal cord peaked on day 7 after SCI. Treg depletion promoted microglia switch to a proinflammatory phenotype. Inflammation-related genes, such as ApoD, as well as downstream cytokines IL-6 and TNF-α were upregulated in microglia in Treg-depleted mice. STAT3 inhibition was involved in Treg-microglia crosstalk, and STAT3 chemical blockade improved function recovery in Treg-depleted mice. CONCLUSION Our results suggest that Tregs promote functional recovery after SCI by alleviating microglia inflammatory reaction via STAT3.
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Affiliation(s)
- Rui Liu
- Department of Neurology, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Ying Li
- Department of Neurology, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Ziyue Wang
- Department of Neurology, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Peng Chen
- Department of Neurology, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Yi Xie
- Department of Neurology, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Wensheng Qu
- Department of Neurology, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China.,Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, China
| | - Minghuan Wang
- Department of Neurology, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China.,Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, China
| | - Zhiyuan Yu
- Department of Neurology, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China.,Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, China
| | - Xiang Luo
- Department of Neurology, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China.,Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, China
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Inhibition of ALKBH5 attenuates I/R-induced renal injury in male mice by promoting Ccl28 m6A modification and increasing Treg recruitment. Nat Commun 2023; 14:1161. [PMID: 36859428 PMCID: PMC9977869 DOI: 10.1038/s41467-023-36747-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 02/15/2023] [Indexed: 03/03/2023] Open
Abstract
Ischemia reperfusion injury (IRI) is a common cause of acute kidney injury (AKI). The role of N6-methyladenosine (m6A) modification in AKI remains unclear. Here, we characterize the role of AlkB homolog 5 (ALKBH5) and m6A modification in an I/R-induced renal injury model in male mice. Alkbh5-knockout mice exhibit milder pathological damage and better renal function than wild-type mice post-IRI, whereas Alkbh5-knockin mice show contrary results. Also conditional knockout of Alkbh5 in the tubular epithelial cells alleviates I/R-induced AKI and fibrosis. CCL28 is identified as a target of ALKBH5. Furthermore, Ccl28 mRNA stability increases with Alkbh5 deficiency, mediating by the binding of insulin-like growth factor 2 binding protein 2. Treg recruitment is upregulated and inflammatory cells are inhibited by the increased CCL28 level in IRI-Alkbh5fl/flKspCre mice. The ALKBH5 inhibitor IOX1 exhibits protective effects against I/R-induced AKI. In summary, inhibition of ALKBH5 promotes the m6A modifications of Ccl28 mRNA, enhancing its stability, and regulating the Treg/inflammatory cell axis. ALKBH5 and this axis is a potential AKI treatment target.
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Sun L, Zhang Y, Cai J, Rimal B, Rocha ER, Coleman JP, Zhang C, Nichols RG, Luo Y, Kim B, Chen Y, Krausz KW, Harris CC, Patterson AD, Zhang Z, Takahashi S, Gonzalez FJ. Bile salt hydrolase in non-enterotoxigenic Bacteroides potentiates colorectal cancer. Nat Commun 2023; 14:755. [PMID: 36765047 PMCID: PMC9918522 DOI: 10.1038/s41467-023-36089-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 01/16/2023] [Indexed: 02/12/2023] Open
Abstract
Bile salt hydrolase (BSH) in Bacteroides is considered a potential drug target for obesity-related metabolic diseases, but its involvement in colon tumorigenesis has not been explored. BSH-expressing Bacteroides is found at high abundance in the stools of colorectal cancer (CRC) patients with overweight and in the feces of a high-fat diet (HFD)-induced CRC mouse model. Colonization of B. fragilis 638R, a strain with low BSH activity, overexpressing a recombinant bsh gene from B. fragilis NCTC9343 strain, results in increased unconjugated bile acids in the colon and accelerated progression of CRC under HFD treatment. In the presence of high BSH activity, the resultant elevation of unconjugated deoxycholic acid and lithocholic acid activates the G-protein-coupled bile acid receptor, resulting in increased β-catenin-regulated chemokine (C-C motif) ligand 28 (CCL28) expression in colon tumors. Activation of the β-catenin/CCL28 axis leads to elevated intra-tumoral immunosuppressive CD25+FOXP3+ Treg cells. Blockade of the β-catenin/CCL28 axis releases the immunosuppression to enhance the intra-tumoral anti-tumor response, which decreases CRC progression under HFD treatment. Pharmacological inhibition of BSH reduces HFD-accelerated CRC progression, coincident with suppression of the β-catenin/CCL28 pathway. These findings provide insights into the pro-carcinogenetic role of Bacteroides in obesity-related CRC progression and characterize BSH as a potential target for CRC prevention and treatment.
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Affiliation(s)
- Lulu Sun
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Yi Zhang
- Department of General Surgery, Cancer Center, Peking University Third Hospital, Beijing, 100191, China
| | - Jie Cai
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Bipin Rimal
- Center for Molecular Toxicology and Carcinogenesis, Department of Veterinary & Biomedical Sciences, Pennsylvania State University, University Park, PA, 16802, USA
| | - Edson R Rocha
- Department of Microbiology and Immunology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - James P Coleman
- Department of Microbiology and Immunology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Chenran Zhang
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Robert G Nichols
- Center for Molecular Toxicology and Carcinogenesis, Department of Veterinary & Biomedical Sciences, Pennsylvania State University, University Park, PA, 16802, USA
| | - Yuhong Luo
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Bora Kim
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Yaozong Chen
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Kristopher W Krausz
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Curtis C Harris
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Andrew D Patterson
- Center for Molecular Toxicology and Carcinogenesis, Department of Veterinary & Biomedical Sciences, Pennsylvania State University, University Park, PA, 16802, USA.
| | - Zhipeng Zhang
- Department of General Surgery, Cancer Center, Peking University Third Hospital, Beijing, 100191, China.
| | - Shogo Takahashi
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA.
| | - Frank J Gonzalez
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA.
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7
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Zhang Y, Lang R, Guo S, Luo X, Li H, Liu C, Dong W, Bao C, Yu Y. Intestinal microbiota and melatonin in the treatment of secondary injury and complications after spinal cord injury. Front Neurosci 2022; 16:981772. [PMID: 36440294 PMCID: PMC9682189 DOI: 10.3389/fnins.2022.981772] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 10/24/2022] [Indexed: 09/12/2023] Open
Abstract
Spinal cord injury (SCI) is a central nervous system (CNS) disease that can cause sensory and motor impairment below the level of injury. Currently, the treatment scheme for SCI mainly focuses on secondary injury and complications. Recent studies have shown that SCI leads to an imbalance of intestinal microbiota and the imbalance is also associated with complications after SCI, possibly through the microbial-brain-gut axis. Melatonin is secreted in many parts of the body including pineal gland and gut, effectively protecting the spinal cord from secondary damage. The secretion of melatonin is affected by circadian rhythms, known as the dark light cycle, and SCI would also cause dysregulation of melatonin secretion. In addition, melatonin is closely related to the intestinal microbiota, which protects the barrier function of the gut through its antioxidant and anti-inflammatory effects, and increases the abundance of intestinal microbiota by influencing the metabolism of the intestinal microbiota. Furthermore, the intestinal microbiota can influence melatonin formation by regulating tryptophan and serotonin metabolism. This paper summarizes and reviews the knowledge on the relationship among intestinal microbiota, melatonin, and SCI in recent years, to provide new theories and ideas for clinical research related to SCI treatment.
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Affiliation(s)
- Yiwen Zhang
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Rui Lang
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Shunyu Guo
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Xiaoqin Luo
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
| | - Huiting Li
- Key Laboratory of Medical Electrophysiology, Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention of Cardiovascular Diseases, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - Cencen Liu
- Department of Pathology, People’s Hospital of Zhongjiang County, Deyang, China
| | - Wei Dong
- Key Laboratory of Medical Electrophysiology, Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention of Cardiovascular Diseases, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - Changshun Bao
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China
- Sichuan Clinical Research Center for Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China
- Academician (Expert) Workstation of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou, China
- Neurological Diseases and Brain Function Laboratory, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Yang Yu
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
- Key Laboratory of Medical Electrophysiology, Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention of Cardiovascular Diseases, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
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Chen C, Ji H, Jiang N, Wang Y, Zhou Y, Zhu Z, Hu Y, Wang Y, Li A, Guo A. Thrombin increases the expression of cholesterol 25-hydroxylase in rat astrocytes after spinal cord injury. Neural Regen Res 2022; 18:1339-1346. [PMID: 36453421 PMCID: PMC9838143 DOI: 10.4103/1673-5374.357905] [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] [Indexed: 11/27/2022] Open
Abstract
Astrocytes are important cellular centers of cholesterol synthesis and metabolism that help maintain normal physiological function at the organism level. Spinal cord injury results in aberrant cholesterol metabolism by astrocytes and excessive production of oxysterols, which have profound effects on neuropathology. 25-Hydroxycholesterol (25-HC), the main product of the membrane-associated enzyme cholesterol-25-hydroxylase (CH25H), plays important roles in mediating neuroinflammation. However, whether the abnormal astrocyte cholesterol metabolism induced by spinal cord injury contributes to the production of 25-HC, as well as the resulting pathological effects, remain unclear. In the present study, spinal cord injury-induced activation of thrombin was found to increase astrocyte CH25H expression. A protease-activated receptor 1 inhibitor was able to attenuate this effect in vitro and in vivo. In cultured primary astrocytes, thrombin interacted with protease-activated receptor 1, mainly through activation of the mitogen-activated protein kinase/nuclear factor-kappa B signaling pathway. Conditioned culture medium from astrocytes in which ch25h expression had been knocked down by siRNA reduced macrophage migration. Finally, injection of the protease activated receptor 1 inhibitor SCH79797 into rat neural sheaths following spinal cord injury reduced migration of microglia/macrophages to the injured site and largely restored motor function. Our results demonstrate a novel regulatory mechanism for thrombin-regulated cholesterol metabolism in astrocytes that could be used to develop anti-inflammatory drugs to treat patients with spinal cord injury.
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Affiliation(s)
- Chen Chen
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China,Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province, China
| | - Huiyuan Ji
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Nan Jiang
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Yingjie Wang
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province, China
| | - Yue Zhou
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Zhenjie Zhu
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Yuming Hu
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Yongjun Wang
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province, China
| | - Aihong Li
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China,Correspondence to: Aisong Guo, ; Aihong Li, .
| | - Aisong Guo
- Department of Traditional Chinese Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China,Correspondence to: Aisong Guo, ; Aihong Li, .
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9
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Laudanski K, Liu D, Okeke T, Restrepo M, Szeto WY. Persistent Depletion of Neuroprotective Factors Accompanies Neuroinflammatory, Neurodegenerative, and Vascular Remodeling Spectra in Serum Three Months after Non-Emergent Cardiac Surgery. Biomedicines 2022; 10:biomedicines10102364. [PMID: 36289630 PMCID: PMC9598177 DOI: 10.3390/biomedicines10102364] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/16/2022] [Accepted: 09/19/2022] [Indexed: 11/24/2022] Open
Abstract
We hypothesized that the persistent depletion of neuroprotective markers accompanies neuroinflammation and neurodegeneration in patients after cardiac surgery. A total of 158 patients underwent elective heart surgery with their blood collected before surgery (tbaseline) and 24 h (t24hr), seven days (t7d), and three months (t3m) post-surgery. The patients’ serum was measured for markers of neurodegeneration (τau, τaup181–183, amyloid β1-40/β2-42, and S100), atypical neurodegeneration (KLK6 and NRGN), neuro-injury (neurofilament light/heavy, UC-HL, and GFAP), neuroinflammation (YKL-40 and TDP-43), peripheral nerve damage (NCAM-1), neuroprotection (apoE4, BDNF, fetuin, and clusterin), and vascular smoldering inflammation (C-reactive protein, CCL-28 IL-6, and IL-8). The mortality at 28 days, incidence of cerebrovascular accidents (CVA), and functional status were followed for three months. The levels of amyloid β1-40/β1-42 and NF-L were significantly elevated at all time points. The levels of τau, S100, KLK6, NRGN, and NCAM-1 were significantly elevated at 24 h. A cluster analysis demonstrated groupings around amyloids, KLK6, and NCAM-1. YKL-40, but not TDP-43, was significantly elevated across all time points. BDNF, apoE4, fetuin, and clusterin levels were significantly diminished long-term. IL-6 and IL-8 levles returned to baseline at t3m. The levels of CRP, CCL-28, and Hsp-70 remained elevated. At 3 months, 8.2% of the patients experienced a stroke, with transfusion volume being a significant variable. Cardiac-surgery patients exhibited persistent peripheral and neuronal inflammation, blood vessel remodeling, and the depletion of neuroprotective factors 3 months post-procedure.
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Affiliation(s)
- Krzysztof Laudanski
- Department of Anesthesiology and Critical Care, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Neurology, University of Pennsylvania, Philadelphia, PA 19104, USA
- Leonard Davis Institute for Health Economics, University of Pennsylvania, Philadelphia, PA 19104, USA
- Correspondence: ; Tel.: +1-215-662-8000
| | - Da Liu
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang 110055, China
| | - Tony Okeke
- Department of Bioengineering, Drexel University, Philadelphia, PA 19104, USA
| | - Mariana Restrepo
- College of Arts and Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Wilson Y. Szeto
- Division of Cardiovascular Surgery, Department of Surgery, University of Pennsylvania, Philadelphia, PA 19104, USA
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Cao L, Li Q. Revealing Potential Spinal Cord Injury Biomarkers and Immune Cell Infiltration Characteristics in Mice. Front Genet 2022; 13:883810. [PMID: 35706450 PMCID: PMC9189360 DOI: 10.3389/fgene.2022.883810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 04/29/2022] [Indexed: 08/04/2023] Open
Abstract
Spinal cord injury (SCI) is a disabling condition with significant morbidity and mortality. Currently, no effective SCI treatment exists. This study aimed to identify potential biomarkers and characterize the properties of immune cell infiltration during this pathological event. To eliminate batch effects, we concurrently analyzed two mouse SCI datasets (GSE5296, GSE47681) from the GEO database. First, we identified differentially expressed genes (DEGs) using linear models for microarray data (LIMMA) and performed functional enrichment studies on those DEGs. Next, we employed bioinformatics and machine-learning methods to identify and define the characteristic genes of SCI. Finally, we validated them using immunofluorescence and qRT-PCR. Additionally, this study assessed the inflammatory status of SCI by identifying cell types using CIBERSORT. Furthermore, we investigated the link between key markers and infiltrating immune cells. In total, we identified 561 robust DEGs. We identified Rab20 and Klf6 as SCI-specific biomarkers and demonstrated their significance using qRT-PCR in the mouse model. According to the examination of immune cell infiltration, M0, M1, and M2 macrophages, along with naive CD8, dendritic cell-activated, and CD4 Follicular T cells may have a role in the progression of SCI. Therefore, Rab20 and Klf6 could be accessible targets for diagnosing and treating SCI. Moreover, as previously stated, immune cell infiltration may significantly impact the development and progression of SCI.
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Affiliation(s)
- Liang Cao
- Department of Traumatic Orthopedics, The Second Affiliated Hospital, University of South China, Hengyang, China
- School of Clinical Medicine, Guizhou Medical University, Guiyang, China
| | - Qing Li
- Department of Orthopedics Traumatic, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
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Xu L, Ye X, Wang Q, Xu B, Zhong J, Chen Y, Wang L. T-cell infiltration, contribution and regulation in the central nervous system post-traumatic injury. Cell Prolif 2021; 54:e13092. [PMID: 34189783 PMCID: PMC8349661 DOI: 10.1111/cpr.13092] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 06/16/2021] [Accepted: 06/18/2021] [Indexed: 12/13/2022] Open
Abstract
T cells participate in the repair process and immune response in the CNS post-traumatic injury and play both a beneficial and harmful role. Together with nerve cells and other immune cells, they form a microenvironment in the CNS post-traumatic injury. The repair of traumatic CNS injury is a long-term process. T cells contribute to the repair of the injury site to influence the recovery. Recently, with the advance of new techniques, such as mass spectrometry-based flow cytometry, modern live-cell imaging, etc, research focusing on T cells is becoming one of the valuable directions for the future therapy of traumatic CNS injury. In this review, we summarized the infiltration, contribution and regulation of T cells in post-traumatic injury, discussed the clinical significance and predicted the future research direction.
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Affiliation(s)
- Lvwan Xu
- Department of Basic Medicine Sciences, and Department of Orthopaedics of Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouChina
| | - Xin Ye
- Department of NeurosurgerySir Run Run Shaw Hospital of Zhejiang University School of MedicineHangzhouChina
| | - Qingyi Wang
- Department of Basic Medicine Sciences, and Department of Orthopaedics of Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouChina
| | - Bihan Xu
- Department of Basic Medicine Sciences, and Department of Orthopaedics of Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouChina
| | - Jinjie Zhong
- Department of Basic Medicine Sciences, and Department of Obstetrics of the Second Affiliated HospitalZhejiang University School of MedicineHangzhouChina
| | - Ying‐ying Chen
- Department of Basic Medicine Sciences, and Department of Obstetrics of the Second Affiliated HospitalZhejiang University School of MedicineHangzhouChina
| | - Lin‐lin Wang
- Department of Basic Medicine Sciences, and Department of Orthopaedics of Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouChina
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Ge M, Tian H, Mao L, Li D, Lin J, Hu H, Huang S, Zhang C, Mei X. Zinc attenuates ferroptosis and promotes functional recovery in contusion spinal cord injury by activating Nrf2/GPX4 defense pathway. CNS Neurosci Ther 2021; 27:1023-1040. [PMID: 33951302 PMCID: PMC8339532 DOI: 10.1111/cns.13657] [Citation(s) in RCA: 109] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 04/15/2021] [Accepted: 04/18/2021] [Indexed: 12/20/2022] Open
Abstract
AIM Spinal cord injury (SCI) involves multiple pathological processes. Ferroptosis has been shown to play a critical role in the injury process. We wanted to explore whether zinc can inhibit ferroptosis, reduce inflammation, and then exert a neuroprotective effect. METHODS The Alice method was used to establish a spinal cord injury model. The Basso Mouse Scale (BMS), Nissl staining, hematoxylin-eosin staining, and immunofluorescence analysis were used to investigate the protective effect of zinc on neurons on spinal cord neurons and the recovery of motor function. The regulation of the nuclear factor E2/heme oxygenase-1 (NRF2/HO-1) pathway was assessed, the levels of essential ferroptosis proteins were measured, and the changes in mitochondria were confirmed by transmission electron microscopy and 5,5',6,6'-tetrachloro-1,1',3,3'-tetraethyl-imidacarbocyanine iodide (JC-1) staining. In vitro experiments using VSC4.1 (spinal cord anterior horn motor neuroma cell line), 4-hydroxynonenal (4HNE), reactive oxygen species (ROS), superoxide dismutase (SOD), malondialdehyde (MDA), glutathione (GSH), lipid peroxides, and finally the levels of inflammatory factors were detected to assess the effect of zinc. RESULTS Zinc reversed behavioral and structural changes after SCI. Zinc increased the expression of NRF2/HO-1, thereby increasing the content of glutathione peroxidase 4 (GPX4), SOD, and GHS and reducing the levels of lipid peroxides, MDA, and ROS. Zinc also rescued injured mitochondria and effectively reduced spinal cord injury and the levels of inflammatory factors, and the NRF2 inhibitor Brusatol reversed the effects of zinc. CONCLUSION Zinc promoted the degradation of oxidative stress products and lipid peroxides through the NRF2/HO-1 and GPX4 signaling pathways to inhibit ferroptosis in neurons.
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Affiliation(s)
- Ming‐hao Ge
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - He Tian
- Department of Histology and EmbryologyJinzhou Medical UniversityJinzhouChina
| | - Liang Mao
- Department of OncologyThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Dao‐yong Li
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Jia‐quan Lin
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Heng‐shuo Hu
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Shuo‐cheng Huang
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Chuan‐jie Zhang
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
| | - Xi‐fan Mei
- Department of OrthopedicsThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina
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