1
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Ren S, Han Q, Zhou P, Wang Z, Huang Y. SDF-1/CXCR4 axis participants in the pathophysiology of adult patients with moyamoya disease. J Stroke Cerebrovasc Dis 2024; 33:107717. [PMID: 38608825 DOI: 10.1016/j.jstrokecerebrovasdis.2024.107717] [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: 11/23/2023] [Revised: 04/03/2024] [Accepted: 04/08/2024] [Indexed: 04/14/2024] Open
Abstract
BACKGROUND Moyamoya disease (MMD) is characterized by an abundance of moyamoya vessels; however, the precise mechanism driving the spontaneous angiogenesis of these compensatory vessels remains unclear. Previous research has established a link between the stromal cell-derived factor-1 (SDF-1)/ CXC receptor 4 (CXCR4) axis and angiogenesis under hypoxic conditions. Nevertheless, the alterations in this axis within the cerebrospinal fluid, arachnoid membranes and vascular tissue of MMD patients have not been fully investigated. METHODS Our study enrolled 66 adult MMD patients and 61 patients with atherosclerotic vascular disease (ACVD). We investigated the SDF-1 concentration in cerebrospinal fluid (CSF) and CXCR4 expression level on the arachnoid membranes and vascular tissue. We utilized enzyme-linked immunosorbent assay and immunohistochemistr. Additionally, we cultured and stimulated human brain microvascular endothelial cells (HBMECs) and smooth muscle cells (SMCs) under oxygen and glucose deprivation (OGD) conditions followed by reoxygenation, to examine any changes in the SDF-1/CXCR4 axis. RESULTS The results demonstrated an elevation in the level of SDF-1 in CSF among MMD patients compared to those with ACVD. Moreover, the expression of CXCR4 in arachnoid membranes and vascular tissue showed a similar trend. Furthermore, the content of CXCR4 in HBMECs and SMCs increased with the duration of ischemia and hypoxia. However, it was observed that the expression of CXCR4 decreased at OGD/R 24h compared to OGD 24h. The temporal pattern of SDF-1 expression in HBMECs and SMCs mirrored that of CXCR4 expression. CONCLUSION These findings indicate a critical role for the SDF-1/CXCR4 axis in the angiogenesis of moyamoya disease.
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MESH Headings
- Humans
- Moyamoya Disease/metabolism
- Moyamoya Disease/physiopathology
- Moyamoya Disease/cerebrospinal fluid
- Receptors, CXCR4/metabolism
- Chemokine CXCL12/metabolism
- Chemokine CXCL12/cerebrospinal fluid
- Male
- Female
- Adult
- Middle Aged
- Cells, Cultured
- Endothelial Cells/metabolism
- Myocytes, Smooth Muscle/metabolism
- Myocytes, Smooth Muscle/pathology
- Signal Transduction
- Cell Hypoxia
- Aged
- Up-Regulation
- Young Adult
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/pathology
- Muscle, Smooth, Vascular/physiopathology
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Affiliation(s)
- Shuaiyu Ren
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Soochow University, 188 Shizi Street, Suzhou 215006, China
| | - Qingdong Han
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Soochow University, 188 Shizi Street, Suzhou 215006, China
| | - Peng Zhou
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Soochow University, 188 Shizi Street, Suzhou 215006, China
| | - Zongqi Wang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Soochow University, 188 Shizi Street, Suzhou 215006, China
| | - Yabo Huang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Soochow University, 188 Shizi Street, Suzhou 215006, China.
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2
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Li J, Wang Z, Li J, Zhao H, Ma Q. HMGB1: A New Target for Ischemic Stroke and Hemorrhagic Transformation. Transl Stroke Res 2024:10.1007/s12975-024-01258-5. [PMID: 38740617 DOI: 10.1007/s12975-024-01258-5] [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: 02/29/2024] [Revised: 04/27/2024] [Accepted: 05/01/2024] [Indexed: 05/16/2024]
Abstract
Stroke in China is distinguished by its high rates of morbidity, recurrence, disability, and mortality. The ultra-early administration of rtPA is essential for restoring perfusion in acute ischemic stroke, though it concurrently elevates the risk of hemorrhagic transformation. High-mobility group box 1 (HMGB1) emerges as a pivotal player in neuroinflammation after brain ischemia and ischemia-reperfusion. Released passively by necrotic cells and actively secreted, including direct secretion of HMGB1 into the extracellular space and packaging of HMGB1 into intracellular vesicles by immune cells, glial cells, platelets, and endothelial cells, HMGB1 represents a prototypical damage-associated molecular pattern (DAMP). It is intricately involved in the pathogenesis of atherosclerosis, thromboembolism, and detrimental inflammation during the early phases of ischemic stroke. Moreover, HMGB1 significantly contributes to neurovascular remodeling and functional recovery in later stages. Significantly, HMGB1 mediates hemorrhagic transformation by facilitating neuroinflammation, directly compromising the integrity of the blood-brain barrier, and enhancing MMP9 secretion through its interaction with rtPA. As a systemic inflammatory factor, HMGB1 is also implicated in post-stroke depression and an elevated risk of stroke-associated pneumonia. The role of HMGB1 extends to influencing the pathogenesis of ischemia by polarizing various subtypes of immune and glial cells. This includes mediating excitotoxicity due to excitatory amino acids, autophagy, MMP9 release, NET formation, and autocrine trophic pathways. Given its multifaceted role, HMGB1 is recognized as a crucial therapeutic target and prognostic marker for ischemic stroke and hemorrhagic transformation. In this review, we summarize the structure and redox properties, secretion and pathways, regulation of immune cell activity, the role of pathophysiological mechanisms in stroke, and hemorrhage transformation for HMGB1, which will pave the way for developing new neuroprotective drugs, reduction of post-stroke neuroinflammation, and expansion of thrombolysis time window.
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Affiliation(s)
- Jiamin Li
- Department of Neurology and Cerebrovascular Diseases Research Institute, Xuanwu Hospital, Capital Medical University, 45 Changchun Street, Beijing, China
| | - Zixin Wang
- Department of Neurology and Cerebrovascular Diseases Research Institute, Xuanwu Hospital, Capital Medical University, 45 Changchun Street, Beijing, China
| | - Jiameng Li
- Department of Neurology and Cerebrovascular Diseases Research Institute, Xuanwu Hospital, Capital Medical University, 45 Changchun Street, Beijing, China
| | - Haiping Zhao
- Department of Neurology and Cerebrovascular Diseases Research Institute, Xuanwu Hospital, Capital Medical University, 45 Changchun Street, Beijing, China.
| | - Qingfeng Ma
- Department of Neurology and Cerebrovascular Diseases Research Institute, Xuanwu Hospital, Capital Medical University, 45 Changchun Street, Beijing, China.
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3
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Gao B, Wang S, Li J, Han N, Ge H, Zhang G, Chang M. HMGB1, angel or devil, in ischemic stroke. Brain Behav 2023; 13:e2987. [PMID: 37062906 PMCID: PMC10176004 DOI: 10.1002/brb3.2987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 03/03/2023] [Accepted: 03/14/2023] [Indexed: 04/18/2023] Open
Abstract
INTRODUCTION High-mobility group box 1 protein (HMGB1) is extensively involved in causing ischemic stroke, pathological damage of ischemic brain injury, and neural tissue repair after ischemic brain injury. However, the precise role of HMGB1 in ischemic stroke remains to be elucidated. METHODS Comprehensive literature search and narrative review to summarize the current field of HMGB1 in cerebral ischemic based on the basic structure, structural modification, and functional roles of HMGB1 described in the literature. RESULTS Studies have exhibited the crucial roles of HMGB1 in cell death, immunity and inflammation, thrombosis, and remodeling and repair. HMGB1 released after cerebral infarction is extensively involved in the pathological injury process in the early stage of cerebral infarction, whereas it is involved in the promotion of brain tissue repair and remodeling in the late stage of cerebral infarction. HMGB1 plays a neurotrophic role in acute white matter stroke, whereas it causes sustained activation of inflammation and plays a damaging role in chronic white matter ischemia. CONCLUSIONS HMGB1 plays a complex role in cerebral infarction, which is related to not only the modification of HMGB1 and bound receptors but also different stages and subtypes of cerebral infarction. future studies on HMGB1 should investigate the spatial and temporal dynamics of HMGB1 after cerebral infarction. Moreover, future studies on HMGB1 should attempt to integrate different stages and infarct subtypes of cerebral infarction.
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Affiliation(s)
- Bin Gao
- Department of NeurologyXi'an No. 3 Hospitalthe Affiliated Hospital of Northest UniversityXi'anShaanxiP.R. China
| | - Shuwen Wang
- Department of NeurologyXi'an No. 3 Hospitalthe Affiliated Hospital of Northest UniversityXi'anShaanxiP.R. China
| | - Jiangfeng Li
- Department of Neurosurgerythe First Hospital of Yu'linYu'linShaanxiChina
| | - Nannan Han
- Department of NeurologyXi'an No. 3 Hospitalthe Affiliated Hospital of Northest UniversityXi'anShaanxiP.R. China
| | - Hanming Ge
- Department of NeurologyXi'an No. 3 Hospitalthe Affiliated Hospital of Northest UniversityXi'anShaanxiP.R. China
| | - Gejuan Zhang
- Department of NeurologyXi'an No. 3 Hospitalthe Affiliated Hospital of Northest UniversityXi'anShaanxiP.R. China
| | - Mingze Chang
- Department of NeurologyXi'an No. 3 Hospitalthe Affiliated Hospital of Northest UniversityXi'anShaanxiP.R. China
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4
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Ma Y, Liu Z, Jiang L, Wang L, Li Y, Liu Y, Wang Y, Yang GY, Ding J, Zhang Z. Endothelial progenitor cell transplantation attenuates synaptic loss associated with enhancing complement receptor 3-dependent microglial/macrophage phagocytosis in ischemic mice. J Cereb Blood Flow Metab 2023; 43:379-392. [PMID: 36457150 PMCID: PMC9941864 DOI: 10.1177/0271678x221135841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 09/01/2022] [Accepted: 09/26/2022] [Indexed: 12/04/2022]
Abstract
Endothelial progenitor cell (EPC) transplantation has therapeutic effects in cerebral ischemia. However, how EPCs modulate microglial activity remains unclear. In the study, we explored whether EPCs modulated microglial/macrophage activity and facilitated injured brain repair. Adult male mice (n = 184) underwent transient middle cerebral artery occlusion, and EPCs were transplanted into the brain immediately after ischemia. Microglial/macrophage activity and complement receptor 3 (CR3) expression were evaluated in ischemic brains and cultured microglia. CR3 agonist leukadherin-1 was administrated into mice immediately after ischemia to imitate the effects of EPCs. Synaptophysin and postsynaptic density protein 95 (PSD-95) expressions were detected in EPC- and leukadherin-1 treated mice. We found that EPC transplantation increased the number of M2 microglia/macrophage-phagocytizing apoptotic cells and CR3 expression in ischemic brains at 3 days after ischemia (p < 0.05). EPC-conditional medium or cultured EPCs increased microglial migration and phagocytosis and upregulated CR3 expression in cultured microglia under oxygen-glucose deprivation condition (p < 0.05). Leukadherin-1 reduced brain atrophy volume and neurological deficits at 14 days after ischemia (p < 0.05). Both EPC transplantation and leukadherin-1 increased synaptophysin and PSD-95 expression at 14 days after ischemia (p < 0.05). EPC transplantation promoted CR3-mediated microglial/macrophage phagocytosis and subsequently attenuated synaptic loss. Our study provided a novel therapeutic mechanism for EPCs.
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Affiliation(s)
- Yuanyuan Ma
- Department of Neurology, Zhongshan Hospital, Fudan University,
Shanghai, China
- Department of Neurology, Ruijin Hospital, School of Medicine and
School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai,
China
| | - Ze Liu
- Department of Neurology, Ruijin Hospital, School of Medicine and
School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai,
China
| | - Lu Jiang
- Department of Neurology, Ruijin Hospital, School of Medicine and
School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai,
China
| | - Liping Wang
- Department of Neurology, Renji Hospital, School of Medicine,
Shanghai Jiao Tong University, Shanghai, China
| | - Yongfang Li
- Department of Neurology, Ruijin Hospital, School of Medicine and
School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai,
China
| | - Yanqun Liu
- Department of Neurology, Changhai Hospital, Second Military
Medical University, Shanghai, China
| | - Yongting Wang
- Department of Neurology, Ruijin Hospital, School of Medicine and
School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai,
China
| | - Guo-Yuan Yang
- Department of Neurology, Ruijin Hospital, School of Medicine and
School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai,
China
| | - Jing Ding
- Department of Neurology, Zhongshan Hospital, Fudan University,
Shanghai, China
| | - Zhijun Zhang
- Department of Neurology, Ruijin Hospital, School of Medicine and
School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai,
China
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5
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Payal N, Sharma L, Sharma A, Hobanii YH, Hakami MA, Ali N, Rashid S, Sachdeva M, Gulati M, Yadav S, Chigurupati S, Singh A, Khan H, Behl T. Understanding the Therapeutic Approaches for Neuroprotection. Curr Pharm Des 2023; 29:3368-3384. [PMID: 38151849 DOI: 10.2174/0113816128275761231103102125] [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: 08/10/2023] [Accepted: 10/07/2023] [Indexed: 12/29/2023]
Abstract
The term "neurodegenerative disorders" refers to a group of illnesses in which deterioration of nerve structure and function is a prominent feature. Cognitive capacities such as memory and decision-making deteriorate as a result of neuronal damage. The primary difficulty that remains is safeguarding neurons since they do not proliferate or regenerate spontaneously and are therefore not substituted by the body after they have been damaged. Millions of individuals throughout the world suffer from neurodegenerative diseases. Various pathways lead to neurodegeneration, including endoplasmic reticulum stress, calcium ion overload, mitochondrial dysfunction, reactive oxygen species generation, and apoptosis. Although different treatments and therapies are available for neuroprotection after a brain injury or damage, the obstacles are inextricably connected. Several studies have revealed the pathogenic effects of hypothermia, different breathed gases, stem cell treatments, mitochondrial transplantation, multi-pharmacological therapy, and other therapies that have improved neurological recovery and survival outcomes after brain damage. The present review highlights the use of therapeutic approaches that can be targeted to develop and understand significant therapies for treating neurodegenerative diseases.
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Affiliation(s)
- Nazrana Payal
- Department of Pharmacy, School of Biotechnology, Shoolini University of Biotechnology and Management Sciences, Solan, Himachal Pradesh, India
| | - Lalit Sharma
- Department of Pharmacology, School of Pharmaceutical Sciences, Shoolini University, Solan, Himachal Pradesh, India
| | - Aditi Sharma
- Department of Pharmacology, School of Pharmaceutical Sciences, Shoolini University, Solan, Himachal Pradesh, India
| | - Yahya Hosan Hobanii
- Department of Pharmacy, College of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia
| | | | - Nemat Ali
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Summya Rashid
- Department of Pharmacology & Toxicology, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Monika Sachdeva
- Department of Pharmacy, Fatima College of Health Sciences, Al Ain, United Arab Emirates
| | - Monica Gulati
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab 1444411, India
- ARCCIM, Faculty of Health, University of Technology, Sydney, Ultimo, NSW 2007, Australia
| | - Shivam Yadav
- School of Pharmacy, Babu Banarasi Das University, Lucknow, Uttar Pradesh, India
| | - Sridevi Chigurupati
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Qassim University, Buraydah 52571, Kingdom of Saudi Arabia
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Saveetha Nagar, Thandalam, Chennai 602105, India
| | - Abhiav Singh
- Department of Pharmacy, Indian Council of Medical Research, New Delhi, India
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University, Mardan 23200, Pakistan
| | - Tapan Behl
- Department of Pharmacy, School of Health Sciences and Technology, University of Petroleum and Energy Studies, Bidholi, Dehradun, Uttarakhand, India
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6
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Wang LP, Pan J, Li Y, Geng J, Liu C, Zhang LY, Zhou P, Tang YH, Wang Y, Zhang Z, Yang GY. Oligodendrocyte precursor cell transplantation promotes angiogenesis and remyelination via Wnt/ β-catenin pathway in a mouse model of middle cerebral artery occlusion. J Cereb Blood Flow Metab 2022; 42:757-770. [PMID: 34878958 PMCID: PMC9254032 DOI: 10.1177/0271678x211065391] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
White matter injury is a critical pathological characteristic during ischemic stroke. Oligodendrocyte precursor cells participate in white matter repairing and remodeling during ischemic brain injury. Since oligodendrocyte precursor cells could promote Wnt-dependent angiogenesis and migrate along vasculature for the myelination during the development in the central nervous system, we explore whether exogenous oligodendrocyte precursor cell transplantation promotes angiogenesis and remyelination after middle cerebral artery occlusion in mice. Here, oligodendrocyte precursor cell transplantation improved motor and cognitive function, and alleviated brain atrophy. Furthermore, oligodendrocyte precursor cell transplantation promoted functional angiogenesis, and increased myelin basic protein expression after ischemic stroke. The further study suggested that white matter repairing after oligodendrocyte precursor cell transplantation depended on angiogenesis induced by Wnt/β-catenin signal pathway. Our results demonstrated a novel pathway that Wnt7a from oligodendrocyte precursor cells acting on endothelial β-catenin promoted angiogenesis and improved neurobehavioral outcomes, which facilitated white matter repair and remodeling during ischemic stroke.
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Affiliation(s)
- Li-Ping Wang
- Department of Neurology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200120, China.,Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Jiaji Pan
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yongfang Li
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Jieli Geng
- Department of Neurology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200120, China
| | - Chang Liu
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Lin-Yuan Zhang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Panting Zhou
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yao-Hui Tang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yongting Wang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Zhijun Zhang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Guo-Yuan Yang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
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7
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Yu F, Wang F, Li K, Du G, Deng B, Xie H, Yang G, Xiao T. Real-time X-ray imaging of mouse cerebral microvessels in vivo using a pixel temporal averaging method. JOURNAL OF SYNCHROTRON RADIATION 2022; 29:239-246. [PMID: 34985441 PMCID: PMC8733992 DOI: 10.1107/s1600577521012522] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 11/25/2021] [Indexed: 06/14/2023]
Abstract
Rodents are used extensively as animal models for the preclinical investigation of microvascular-related diseases. However, motion artifacts in currently available imaging methods preclude real-time observation of microvessels in vivo. In this paper, a pixel temporal averaging (PTA) method that enables real-time imaging of microvessels in the mouse brain in vivo is described. Experiments using live mice demonstrated that PTA efficiently eliminated motion artifacts and random noise, resulting in significant improvements in contrast-to-noise ratio. The time needed for image reconstruction using PTA with a normal computer was 250 ms, highlighting the capability of the PTA method for real-time angiography. In addition, experiments with less than one-quarter of photon flux in conventional angiography verified that motion artifacts and random noise were suppressed and microvessels were successfully identified using PTA, whereas conventional temporal subtraction and averaging methods were ineffective. Experiments performed with an X-ray tube verified that the PTA method could also be successfully applied to microvessel imaging of the mouse brain using a laboratory X-ray source. In conclusion, the proposed PTA method may facilitate the real-time investigation of cerebral microvascular-related diseases using small animal models.
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Affiliation(s)
- Fucheng Yu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, People’s Republic of China
- Shanghai Synchrotron Radiation Facility/Zhang Jiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201800, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Feixiang Wang
- Shanghai Synchrotron Radiation Facility/Zhang Jiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201800, People’s Republic of China
| | - Ke Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, People’s Republic of China
- Shanghai Synchrotron Radiation Facility/Zhang Jiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201800, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Guohao Du
- Shanghai Synchrotron Radiation Facility/Zhang Jiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201800, People’s Republic of China
| | - Biao Deng
- Shanghai Synchrotron Radiation Facility/Zhang Jiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201800, People’s Republic of China
| | - Honglan Xie
- Shanghai Synchrotron Radiation Facility/Zhang Jiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201800, People’s Republic of China
| | - Guoyuan Yang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China
| | - Tiqiao Xiao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, People’s Republic of China
- Shanghai Synchrotron Radiation Facility/Zhang Jiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201800, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
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8
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High mobility group box 1 promotes the differentiation of spinal ependymal cells into astrocytes rather than neurons. Neuroreport 2021; 32:399-406. [PMID: 33661806 DOI: 10.1097/wnr.0000000000001609] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Spinal ependymal cells are involved in proliferation, differentiation and migration after spinal cord injury (SCI) and represent an endogenous source of repair cells for treating SCI. However, 95% of activated ependymal cells eventually differentiate into astrocytes after SCI and ultimately contribute more than half of the new astrocytes that form glial scars in vivo. The factors that regulate the fate of ependymal cells after SCI remain unclear. High mobility group box 1 (HMGB1) is regarded as an important proinflammatory factor in nerve injury, and recent studies have shown that HMGB1 can regulate the fate of stem cells after injury. In this study, we investigated whether HMGB1 released from reactive astrocytes after SCI regulates the proliferation and differentiation of ependymal cells in vitro. Ependymal cells extracted and cultured from the spinal cord of mice were separately treated with astrocyte culture medium (ACM), IL-1β, ACM (IL-1β) and the HMGB1 protein, and the proliferation and differentiation of ependymal cells were detected. Additionally, an HMGB1-neutralizing antibody (anti-HMGB1) was added to further verify the regulatory effect of HMGB1 on ependymal cells. The results showed that HMGB1 released from reactive astrocytes promoted ependymal cell differentiation into astrocytes and inhibited ependymal cell differentiation into neurons in vitro; however, the effect disappeared after the addition of anti-HMGB1. HMGB1 had no significant effect on ependymal cell proliferation. Our findings demonstrate that HMGB1 can regulate the differentiation of ependymal cells after SCI. These results provide a new strategy for the treatment of SCI.
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9
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Gou X, Ying J, Yue Y, Qiu X, Hu P, Qu Y, Li J, Mu D. The Roles of High Mobility Group Box 1 in Cerebral Ischemic Injury. Front Cell Neurosci 2020; 14:600280. [PMID: 33384585 PMCID: PMC7770223 DOI: 10.3389/fncel.2020.600280] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 11/25/2020] [Indexed: 12/11/2022] Open
Abstract
High mobility group box 1 (HMGB1) is a ubiquitous nuclear protein that plays an important role in stabilizing nucleosomes and DNA repair. HMGB1 can be passively released from necrotic neurons or actively secreted by microglia, macrophages/monocytes, and neutrophils. Cerebral ischemia is a major cause of mortality and disability worldwide, and its outcome depends on the number of neurons dying due to hypoxia in the ischemic area. HMGB1 contributes to the pathogenesis of cerebral ischemia via mediating neuroinflammatory responses to cerebral ischemic injury. Extracellular HMGB1 regulates many neuroinflammatory events by interacting with its different cell surface receptors, such as receptors for advanced glycation end products, toll-like receptor (TLR)-2, and TLR-4. Additionally, HMGB1 can be redox-modified, thus exerting specific cellular functions in the ischemic brain and has different roles in the acute and late stages of cerebral ischemic injury. However, the role of HMGB1 in cerebral ischemia is complex and remains unclear. Herein, we summarize and review the research on HMGB1 in cerebral ischemia, focusing especially on the role of HMGB1 in hypoxic ischemia in the immature brain and in white matter ischemic injury. We also outline the possible mechanisms of HMGB1 in cerebral ischemia and the main strategies to inhibit HMGB1 pertaining to its potential as a novel critical molecular target in cerebral ischemic injury.
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Affiliation(s)
- Xiaoyun Gou
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Obstetric & Gynecologic and Pediatric Diseases and Birth Defects, Ministry of Education, Sichuan University, Chengdu, China
| | - Junjie Ying
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Obstetric & Gynecologic and Pediatric Diseases and Birth Defects, Ministry of Education, Sichuan University, Chengdu, China
| | - Yan Yue
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Obstetric & Gynecologic and Pediatric Diseases and Birth Defects, Ministry of Education, Sichuan University, Chengdu, China
| | - Xia Qiu
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Obstetric & Gynecologic and Pediatric Diseases and Birth Defects, Ministry of Education, Sichuan University, Chengdu, China
| | - Peng Hu
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Obstetric & Gynecologic and Pediatric Diseases and Birth Defects, Ministry of Education, Sichuan University, Chengdu, China
| | - Yi Qu
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Obstetric & Gynecologic and Pediatric Diseases and Birth Defects, Ministry of Education, Sichuan University, Chengdu, China
| | - Jinhui Li
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Obstetric & Gynecologic and Pediatric Diseases and Birth Defects, Ministry of Education, Sichuan University, Chengdu, China
| | - Dezhi Mu
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Obstetric & Gynecologic and Pediatric Diseases and Birth Defects, Ministry of Education, Sichuan University, Chengdu, China
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10
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Ma Y, Jiang L, Wang L, Li Y, Liu Y, Lu W, Shi R, Zhang L, Fu Z, Qu M, Liu Y, Wang Y, Zhang Z, Yang GY. Endothelial progenitor cell transplantation alleviated ischemic brain injury via inhibiting C3/C3aR pathway in mice. J Cereb Blood Flow Metab 2020; 40:2374-2386. [PMID: 31865842 PMCID: PMC7820683 DOI: 10.1177/0271678x19892777] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Endothelial progenitor cell transplantation is a potential therapeutic approach in brain ischemia. However, whether the therapeutic effect of endothelial progenitor cells is via affecting complement activation is unknown. We established a mouse focal ischemia model (n = 111) and transplanted endothelial progenitor cells into the peri-infarct region immediately after brain ischemia. Neurological outcomes and brain infarct/atrophy volume were examined after ischemia. Expression of C3, C3aR and pro-inflammatory factors were further examined to explore the role of endothelial progenitor cells in ischemic brain. We found that endothelial progenitor cells improved neurological outcomes and reduced brain infarct/atrophy volume after 1 to 14 days of ischemia compared to the control (p < 0.05). C3 and C3aR expression in the brain was up-regulated at 1 day up to 14 days (p < 0.05). Endothelial progenitor cells reduced astrocyte-derived C3 (p < 0.05) and C3aR expression (p < 0.05) after ischemia. Endothelial progenitor cells also reduced inflammatory response after ischemia (p < 0.05). Endothelial progenitor cell transplantation reduced astrocyte-derived C3 expression in the brain after ischemic stroke, together with decreased C3aR and inflammatory response contributing to neurological function recovery. Our results indicate that modulating complement C3/C3aR pathway is a novel therapeutic target for the ischemic stroke.
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Affiliation(s)
- Yuanyuan Ma
- Department of Neurology, Ruijin Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.,Department of Neurology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lu Jiang
- Department of Neurology, Ruijin Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Liping Wang
- Department of Neurology, Ruijin Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yongfang Li
- Department of Neurology, Ruijin Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yanqun Liu
- Department of Neurology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Wenjing Lu
- Department of Neurology, Ruijin Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Rubing Shi
- Department of Neurology, Ruijin Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Linyuan Zhang
- Department of Neurology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Zongjie Fu
- Department of Neurology, Ruijin Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Meijie Qu
- Department of Neurology, Ruijin Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yingling Liu
- Department of Neurosurgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Yongting Wang
- Department of Neurology, Ruijin Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Zhijun Zhang
- Department of Neurology, Ruijin Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Guo-Yuan Yang
- Department of Neurology, Ruijin Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
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11
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Mangin G, Kubis N. Cell Therapy for Ischemic Stroke: How to Turn a Promising Preclinical Research into a Successful Clinical Story. Stem Cell Rev Rep 2020; 15:176-193. [PMID: 30443706 DOI: 10.1007/s12015-018-9864-3] [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: 12/22/2022]
Abstract
Stroke is a major public health issue with limited treatment. The pharmacologically or mechanically removing of the clot is accessible to less than 10% of the patients. Stem cell therapy is a promising alternative strategy since it increases the therapeutic time window but many issues remain unsolved. To avoid a new dramatic failure when translating experimental data on the bedside, this review aims to highlight the indispensable checkpoints to make a successful clinical trial based on the current preclinical literature. The large panel of progenitors/ stem cells at the researcher's disposal is to be used wisely, regarding the type of cells, the source of cells, the route of delivery, the time window, since it will directly affect the outcome. Mechanisms are still incompletely understood, although recent studies have focused on the inflammation modulation of most cells types.
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Affiliation(s)
| | - Nathalie Kubis
- INSERM U965, F-75475, Paris, France. .,Sorbonne Paris Cité, Université Paris Diderot, F-75475, Paris, France. .,Service de Physiologie Clinique-Explorations Fonctionnelles, AP-HP, Hôpital Lariboisière, 2 rue Ambroise Paré, F-75475, Paris, France.
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12
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Famakin BM, Vemuganti R. Toll-Like Receptor 4 Signaling in Focal Cerebral Ischemia: a Focus on the Neurovascular Unit. Mol Neurobiol 2020; 57:2690-2701. [PMID: 32306272 DOI: 10.1007/s12035-020-01906-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 03/19/2020] [Indexed: 12/14/2022]
Abstract
A robust innate immune activation leads to downstream expression of inflammatory mediators that amplify tissue damage and consequently increase the morbidity after stroke. The Toll-like receptor 4 (TLR4) pathway is a major innate immune pathway activated acutely and chronically after stroke. Hence, understanding the intricacies of the temporal profile, specific control points, and cellular specificity of TLR4 activation is crucial for the development of any novel therapeutics targeting the endogenous innate immune response after focal cerebral ischemia. The goal of this review is to summarize the current findings related to TLR4 signaling after stroke with a specific focus on the components of the neurovascular unit such as astrocytes, neurons, endothelial cells, and pericytes. In addition, this review will examine the effects of focal cerebral ischemia on interaction of these neurovascular unit components.
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Affiliation(s)
| | - R Vemuganti
- Department of Neurological Surgery, University of Wisconsin, Madison, WI, USA
- William S. Middleton VA Hospital, Madison, WI, USA
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13
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Pan J, Qu M, Li Y, Wang L, Zhang L, Wang Y, Tang Y, Tian HL, Zhang Z, Yang GY. MicroRNA-126-3p/-5p Overexpression Attenuates Blood-Brain Barrier Disruption in a Mouse Model of Middle Cerebral Artery Occlusion. Stroke 2020; 51:619-627. [PMID: 31822249 DOI: 10.1161/strokeaha.119.027531] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Background and Purpose—
Blood-brain barrier (BBB) disruption is a critical pathological feature after stroke. MicroRNA-126 (miR-126) maintains BBB integrity by regulating endothelial cell function during development. However, the role of miR-126-3p and -5p in BBB integrity after stroke is unclear. Here, we investigated whether miR-126-3p and -5p overexpression regulates BBB integrity after cerebral ischemia.
Methods—
A lentivirus carrying genes encoding miR-126-3p or -5p was stereotactically injected into adult male Institute of Cancer Research mouse brains (n=36). Permanent middle cerebral artery occlusion was performed 2 weeks after virus injection. Brain infarct volume, edema volume, and modified neurological severity score were assessed at 1 and 3 days after ischemia. Immunostaining of ZO-1 (zonula occludens-1) and occludin was used to evaluate BBB integrity. IL-1β (interleukin-1β), TNF-α (tumor necrosis factor-α), VCAM-1 (vascular cell adhesion molecule-1), and E-selectin expression levels were determined by real-time polymerase chain reaction and Western blot analysis.
Results—
The expression of miR-126-3p and -5p decreased at 1 and 3 days after ischemia (
P
<0.05). Injection of lentiviral miR-126-3p or -5p reduced brain infarct volume and edema volume (
P
<0.05) and attenuated the decrease in ZO-1/occludin protein levels and IgG leakage at 3 days after stroke (
P
<0.05). Injection of lentiviral miR-126-5p improved behavioral outcomes at 3 days after stroke (
P
<0.05). miR-126-3p and -5p overexpression downregulated the expression of proinflammatory cytokines IL-1β and TNF-α and adhesion molecules VCAM-1 and E-selectin, as well as decreased MPO
+
(myeloperoxidase positive) cell numbers at 3 days after ischemia (
P
<0.05).
Conclusions—
miR-126-3p and -5p overexpression reduced the expression of proinflammatory cytokines and adhesion molecules, and attenuated BBB disruption after ischemic stroke, suggesting that miR-126-3p and -5p are new therapeutic targets in the acute stage of stroke.
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Affiliation(s)
- Jiaji Pan
- From the Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, and School of Biomedical Engineering (J.P., M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
| | - Meijie Qu
- From the Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, and School of Biomedical Engineering (J.P., M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
- Department of Neurology, Ruijin Hospital, School of Medicine (M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
| | - Yongfang Li
- From the Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, and School of Biomedical Engineering (J.P., M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
- Department of Neurology, Ruijin Hospital, School of Medicine (M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
| | - Liping Wang
- From the Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, and School of Biomedical Engineering (J.P., M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
- Department of Neurology, Ruijin Hospital, School of Medicine (M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
| | - Linyuan Zhang
- From the Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, and School of Biomedical Engineering (J.P., M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
- Department of Neurology, Ruijin Hospital, School of Medicine (M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
| | - Yongting Wang
- From the Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, and School of Biomedical Engineering (J.P., M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
- Department of Neurology, Ruijin Hospital, School of Medicine (M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
| | - Yaohui Tang
- From the Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, and School of Biomedical Engineering (J.P., M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
- Department of Neurology, Ruijin Hospital, School of Medicine (M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
| | - Heng-Li Tian
- Department of Neurosurgery, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital (H.-L.T.), Shanghai Jiao Tong University, China
| | - Zhijun Zhang
- From the Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, and School of Biomedical Engineering (J.P., M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
- Department of Neurology, Ruijin Hospital, School of Medicine (M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
| | - Guo-Yuan Yang
- From the Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, and School of Biomedical Engineering (J.P., M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
- Department of Neurology, Ruijin Hospital, School of Medicine (M.Q., Y.L., L.W., L.Z., Y.W., Y.T., Z.Z., G.-Y.Y.), Shanghai Jiao Tong University, China
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14
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Shen Z, Chen Q, Ying H, Ma Z, Bi X, Li X, Wang M, Jin C, Lai D, Zhao Y, Fu G. Identification of differentially expressed genes in the endothelial precursor cells of patients with type 2 diabetes mellitus by bioinformatics analysis. Exp Ther Med 2019; 19:499-510. [PMID: 31897097 PMCID: PMC6923743 DOI: 10.3892/etm.2019.8239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 10/18/2019] [Indexed: 12/21/2022] Open
Abstract
Type 2 diabetes mellitus (DM) is a metabolic disease with worldwide prevalence that is associated with a decrease in the number and function of endothelial progenitor cells (EPCs). The aim of the present study was to explore the potential hub genes of EPCs in patients with type 2 DM. Differentially expressed genes (DEGs) were screened from a public microarray dataset (accession no. GSE43950). Pathway and functional enrichment analyses were performed using the Database for Annotation, Visualization and Integrated Discovery. The protein-protein interaction (PPI) network was visualized. The most significantly clustered modules and hub genes were identified using Cytoscape. Furthermore, hub genes were validated by quantitative PCR analysis of EPCs isolated from diabetic and normal subjects. Subsequently, weighted gene co-expression network analysis (WGCNA) was performed to identify the modules incorporating the genes exhibiting the most significant variance. A total of 970 DEGs were obtained and they were mainly accumulated in inflammation-associated pathways. A total of 9 hub genes were extracted from the PPI network and the highest differential expression was determined for the interleukin 8 (IL8) and CXC chemokine ligand 1 (CXCL1) genes. In the WGCNA performed to determine the modules associated with type 2 DM, one module incorporated IL8 and CXCL1. Finally, pathway enrichment of 10% genes in the pink module ordered by intramodular connectivity (IC) was associated with the IL17 and the chemokine signaling pathways. The present results revealed that the expression of IL8 and CXCL1 may serve important roles in the pathophysiology of EPCs during type 2 DM and inflammatory response may be critical for the reduced number and hypofunction of EPCs isolated from patients with diabetes.
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Affiliation(s)
- Zhida Shen
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, P.R. China
| | - Qi Chen
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, P.R. China
| | - Hangying Ying
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, P.R. China
| | - Zetao Ma
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, P.R. China
| | - Xukun Bi
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, P.R. China
| | - Xiaoting Li
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, P.R. China
| | - Meihui Wang
- Biomedical Research Center, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, P.R. China
| | - Chongying Jin
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, P.R. China
| | - Dongwu Lai
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, P.R. China
| | - Yanbo Zhao
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, P.R. China
| | - Guosheng Fu
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, P.R. China
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15
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Wang C, Zhang Q, Yu K, Shen X, Wu Y, Wu J. Enriched Environment Promoted Cognitive Function via Bilateral Synaptic Remodeling After Cerebral Ischemia. Front Neurol 2019; 10:1189. [PMID: 31781025 PMCID: PMC6861441 DOI: 10.3389/fneur.2019.01189] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 10/25/2019] [Indexed: 01/10/2023] Open
Abstract
Ischemic stroke is the second leading cause of death worldwide. Ischemia-induced cognitive dysfunction may result in a poor quality of life. Synaptic plasticity plays a key role in cognition promotion. An enriched environment (EE), which can attenuate cognitive deficits in chronic cerebral hypoperfusion, has been shown to facilitate synaptic plasticity. However, the effect of EE on synaptic plasticity in bilateral cerebral hemispheres in stroke remains unclear. This study used a permanent middle cerebral artery occlusion mouse model, which was divided into standard housing and EE groups. The Morris water maze test was performed to detect the cognitive function. Electron microscopy was used to determine the synapse numbers. The expression of SYN and GAP-43 was then quantified by immunofluorescence staining and Western blot analysis. Compared with the standard housing, EE promoted the cognitive function recovery in the mice with stroke. Moreover, EE increased the synapse numbers and the expression of SYN and GAP-43 in both the ipsilateral and contralateral hemispheres (P < 0.05). A further correlation analysis revealed a positive correlation between the cognitive function outcomes and the relative expression of GAP-43 and SYN. Furthermore, the correlation of the expression of GAP-43 and SYN with cognitive function was higher in the contralateral brain than in the ipsilateral brain. In conclusion, an EE may promote cognitive function via bilateral synaptic remodeling after cerebral ischemia. Also, the contralateral brain may play an important role in the recovery of cognitive function.
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Affiliation(s)
- Chuanjie Wang
- Department of Rehabilitation Medicine, Huashan Hospital, Fudan University, Shanghai, China.,Department of Rehabilitation Medicine, Jinshan Hospital, Fudan University, Shanghai, China
| | - Qun Zhang
- Department of Rehabilitation Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Kewei Yu
- Department of Rehabilitation Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Xueyan Shen
- Department of Rehabilitation Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Yi Wu
- Department of Rehabilitation Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Junfa Wu
- Department of Rehabilitation Medicine, Huashan Hospital, Fudan University, Shanghai, China
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16
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Wang J, Lin X, Mu Z, Shen F, Zhang L, Xie Q, Tang Y, Wang Y, Zhang Z, Yang GY. Rapamycin Increases Collateral Circulation in Rodent Brain after Focal Ischemia as detected by Multiple Modality Dynamic Imaging. Am J Cancer Res 2019; 9:4923-4934. [PMID: 31410191 PMCID: PMC6691378 DOI: 10.7150/thno.32676] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Accepted: 03/17/2019] [Indexed: 01/09/2023] Open
Abstract
Rationale: Brain collaterals contribute to improving ischemic stroke outcomes. However, dynamic and timely investigations of collateral blood flow and collateral restoration in whole brains of living animals have rarely been reported. Methods: Using multiple modalities of imaging, including synchrotron radiation angiography, laser speckle imaging, and micro-CT imaging, we dynamically explored collateral circulation throughout the whole brain in the rodent middle cerebral artery occlusion model. Results: We demonstrated that compared to control animals, 4 neocollaterals gradually formed between the intra- and extra-arteries in the skull base of model animals after occlusion (p<0.05). Two main collaterals were critical to the supply of blood from the posterior to the middle cerebral artery territory in the deep brain (p<0.05). Abundant small vessel and capillary anastomoses were detected on the surface of the cortex between the posterior and middle cerebral artery and between the anterior and middle cerebral artery (p<0.05). Collateral perfusion occurred immediately (≈15 min) and was maintained for up to 14 days after occlusion. Further study revealed that administration of rapamycin at 15 min after MCAO dilated the existing collateral vessels and promoted collateral perfusion. Principal conclusions: Our results provide evidence of collateral functional perfusion in the skull base, deep brain, and surface of the cortex. Rapamycin was capable of enlarging the diameter of collaterals, potentially extending the time window for ischemic stroke therapy.
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17
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Zhou PT, Wang LP, Qu MJ, Shen H, Zheng HR, Deng LD, Ma YY, Wang YY, Wang YT, Tang YH, Tian HL, Zhang ZJ, Yang GY. Dl-3-N-butylphthalide promotes angiogenesis and upregulates sonic hedgehog expression after cerebral ischemia in rats. CNS Neurosci Ther 2019; 25:748-758. [PMID: 30784219 PMCID: PMC6515698 DOI: 10.1111/cns.13104] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 12/21/2018] [Accepted: 12/23/2018] [Indexed: 12/12/2022] Open
Abstract
INTRODUCTION Dl-3-N-butylphthalide (NBP), a small molecule drug used clinically in the acute phase of ischemic stroke, has been shown to improve functional recovery and promote angiogenesis and collateral vessel circulation after experimental cerebral ischemia. However, the underlying molecular mechanism is unknown. AIMS To explore the potential molecular mechanism of angiogenesis induced by NBP after cerebral ischemia. RESULTS NBP treatment attenuated body weight loss, reduced brain infarct volume, and improved neurobehavioral outcomes during focal ischemia compared to the control rats (P < 0.05). NBP increased the number of CD31+ microvessels, the number of CD31+ /BrdU+ proliferating endothelial cells, and the functional vascular density (P < 0.05). Further study demonstrated that NBP also promoted the expression of vascular endothelial growth factor and angiopoietin-1 (P < 0.05), which was accompanied by upregulated sonic hedgehog expression in astrocytes in vivo and in vitro. CONCLUSION NBP treatment promoted the expression of vascular endothelial growth factor and angiopoietin-1, induced angiogenesis, and improved neurobehavioral recovery. These effects were associated with increased sonic hedgehog expression after NBP treatment. Our results broadened the clinical application of NBP to include the later phase of ischemia.
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Affiliation(s)
- Pan-Ting Zhou
- Shanghai Jiao Tong Affiliated Sixth People's Hospital, Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Li-Ping Wang
- Department of Neurology, School of Medicine, Ruijin Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Mei-Jie Qu
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
| | - Hui Shen
- Shanghai Jiao Tong Affiliated Sixth People's Hospital, Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Hao-Ran Zheng
- Shanghai Jiao Tong Affiliated Sixth People's Hospital, Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Li-Dong Deng
- Shanghai Jiao Tong Affiliated Sixth People's Hospital, Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yuan-Yuan Ma
- Department of Neurology, School of Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yu-Yang Wang
- Department of Rehabilitation Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
| | - Yong-Ting Wang
- Shanghai Jiao Tong Affiliated Sixth People's Hospital, Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yao-Hui Tang
- Shanghai Jiao Tong Affiliated Sixth People's Hospital, Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Heng-Li Tian
- Shanghai Jiao Tong Affiliated Sixth People's Hospital, Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Zhi-Jun Zhang
- Shanghai Jiao Tong Affiliated Sixth People's Hospital, Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Guo-Yuan Yang
- Shanghai Jiao Tong Affiliated Sixth People's Hospital, Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.,Department of Neurology, School of Medicine, Ruijin Hospital, Shanghai Jiao Tong University, Shanghai, China
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18
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Nakayama T, Nagata E, Masuda H, Asahara T, Takizawa S. Regeneration-associated cell transplantation contributes to tissue recovery in mice with acute ischemic stroke. PLoS One 2019; 14:e0210198. [PMID: 30682162 PMCID: PMC6347160 DOI: 10.1371/journal.pone.0210198] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Accepted: 12/18/2018] [Indexed: 01/05/2023] Open
Abstract
Various cell-based therapeutic strategies have been investigated for vascular and tissue regeneration after ischemic stroke. We have developed a novel cell population, called regeneration-associated cells (RACs), by quality- and quantity-controlled culture of unfractionated mononuclear cells. RACs were trans-arterially injected into 10-week-old syngeneic male mice at 1, 3, 5 or 7 days after permanent middle cerebral artery occlusion (MCAO) to determine the optimal timing for administration in terms of outcome at day 21. Next, we examined the effects of RACs injection at day 1 after MCAO on neurological deficits, infarct volume, and mediators of vascular regeneration and anti-inflammation at days 7 and 21. Infarct volume at day 21 was significantly reduced by transplantation of RACs at day 1 or 3. RACs injected at day 1 reduced the infarct volume at day 7 and 21. Angiogenesis and anti-inflammatory mediators, VEGF and IL-10, were increased at day 7, and VEGF was still upregulated at day 21. We also observed significantly enhanced ink perfusion in vivo, tube formation in vitro, and definitive endothelial progenitor cell colonies in colony assay. These results suggest that RAC transplantation in MCAO models promoted significant recovery of neural tissues through intensified anti-inflammatory and angiogenic effects.
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Affiliation(s)
- Taira Nakayama
- Department of Neurology, Tokai University School of Medicine, Isehara, Japan
| | - Eiichiro Nagata
- Department of Neurology, Tokai University School of Medicine, Isehara, Japan
| | - Haruchika Masuda
- Department of Physiology, Tokai University School of Medicine, Isehara, Japan
| | - Takayuki Asahara
- Department of Regenerative Medicine Science, Tokai University School of Medicine, Isehara, Japan
| | - Shunya Takizawa
- Department of Neurology, Tokai University School of Medicine, Isehara, Japan
- * E-mail:
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19
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Dynamic Detection of Thrombolysis in Embolic Stroke Rats by Synchrotron Radiation Angiography. Transl Stroke Res 2019; 10:695-704. [PMID: 30680639 DOI: 10.1007/s12975-019-0687-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 11/30/2018] [Accepted: 01/03/2019] [Indexed: 12/20/2022]
Abstract
A rodent model of embolic middle cerebral artery occlusion is used to mimic cerebral embolism in clinical patients. Thrombolytic therapy is the effective treatment for this ischemic injury. However, it is difficult to detect thrombolysis dynamically in living animals. Synchrotron radiation angiography may provide a novel approach to directly monitor the thrombolytic process and assess collateral circulation after embolic stroke. Thirty-six adult Sprague-Dawley rats underwent the embolic stroke model procedure and were then treated with tissue plasminogen activator. The angiographic images were obtained in vivo by synchrotron radiation angiography. Synchrotron radiation angiography confirmed the successful establishment of occlusion and detected the thrombolysis process after the thrombolytic treatment. The time of thrombolytic recanalization was unstable during embolic stroke. The infarct volume increased as the recanalization time was delayed from 2 to 6 h (p < 0.05). The collateral circulation of the internal carotid artery to the ophthalmic artery, the olfactory artery to the ophthalmic artery, and the posterior cerebral artery to the middle cerebral artery opened after embolic stroke and manifested different opening rates (59%, 24%, and 75%, respectively) in the rats. The opening of the collateral circulation from the posterior cerebral artery to the middle cerebral artery alleviated infarction in rats with successful thrombolysis (p < 0.05). The cerebral vessels of the circle of Willis narrowed after thrombolysis (p < 0.05). Synchrotron radiation angiography provided a unique tool to dynamically detect and assess the thrombolysis process and the collateral circulation during thrombolytic therapy.
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20
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Rikhtegar R, Yousefi M, Dolati S, Kasmaei HD, Charsouei S, Nouri M, Shakouri SK. Stem cell-based cell therapy for neuroprotection in stroke: A review. J Cell Biochem 2018; 120:8849-8862. [PMID: 30506720 DOI: 10.1002/jcb.28207] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 11/15/2018] [Indexed: 12/15/2022]
Abstract
Neurological disorders, such as stroke, are triggered by a loss of neurons and glial cells. Ischemic stroke remains a substantial problem for industrialized countries. Over the previous few decades our understanding about the pathophysiology of stroke has enhanced, nevertheless, more awareness is required to advance the field of stroke recovery. Existing therapies are incapable to adequately relief the disease outcome and are not appropriate to all patients. Meanwhile, the majority of patients continue to show neurological deficits even subsequent effective thrombolysis, recuperative therapies are immediately required that stimulate brain remodeling and repair once stroke damage has happened. Cell therapy is emergent as a hopeful new modality for increasing neurological recovery in ischemic stroke. Numerous types of stem cells from various sources have been identified and their possibility and efficiency for the treatment of stroke have been investigated. Stem cell therapy in patients with stroke using adult stem cells have been first practiced in clinical trials since 15 years ago. Even though stem cells have revealed a hopeful role in ischemic stroke in investigational studies besides early clinical pilot studies, cellular therapy in human is still at a primary stage. In this review, we summarize the types of stem cells, various delivery routes, and clinical application of stem cell-based therapy for stroke treatment.
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Affiliation(s)
- Reza Rikhtegar
- Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mehdi Yousefi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Immunology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sanam Dolati
- Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran.,Student's Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hosein Delavar Kasmaei
- Department of Neurology, Shohada-e-Tajrish Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeid Charsouei
- Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Nouri
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Seyed Kazem Shakouri
- Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran.,Physical Medicine and Rehabilitation Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran
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21
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Namestnikova DD, Tairova RT, Sukhinich KK, Cherkashova EA, Gubskiy IL, Gubskiy LV, Yarygin KN. [Cell therapy for ischemic stroke. Stem cell types and results of pre-clinical trials]. Zh Nevrol Psikhiatr Im S S Korsakova 2018; 118:69-75. [PMID: 30499563 DOI: 10.17116/jnevro201811809269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The literature review addresses the use of stem cells (SC) in ischemic stroke (IS). Part 1 of the paper overviews the results of experimental animal studies. Characteristics of different SC types and results of their studies in experimental models of IS are presented in the first section, the second section considers pros and cons of the methods of SC injection.
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Affiliation(s)
- D D Namestnikova
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - R T Tairova
- National Research Institute of Cerebrovascular Pathology and Stroke, Moscow, Russia
| | - K K Sukhinich
- Kol'tsov Institute of Development Biology, Moscow, Russia
| | - E A Cherkashova
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - I L Gubskiy
- National Research Institute of Cerebrovascular Pathology and Stroke, Moscow, Russia
| | - L V Gubskiy
- National Research Institute of Cerebrovascular Pathology and Stroke, Moscow, Russia
| | - K N Yarygin
- Orekhovich Research Institute of Biomedical Chemistry, Moscow, Russia
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22
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Chen H, Chen X, Luo Y, Shen J. Potential molecular targets of peroxynitrite in mediating blood–brain barrier damage and haemorrhagic transformation in acute ischaemic stroke with delayed tissue plasminogen activator treatment. Free Radic Res 2018; 52:1220-1239. [PMID: 30468092 DOI: 10.1080/10715762.2018.1521519] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Hansen Chen
- School of Chinese Medicine, the University of Hong Kong, PR China
- Shenzhen Institute of Research and Innovation (HKU-SIRI), University of Hong Kong, Hong Kong, PR China
| | - Xi Chen
- Department of Core Facility, the People’s Hospital of Bao-an Shenzhen, Shenzhen, PR China
- The 8th People’s Hospital of Shenzhen, the Affiliated Bao-an Hospital of Southern Medical University, Shenzhen, PR China
| | - Yunhao Luo
- School of Chinese Medicine, the University of Hong Kong, PR China
| | - Jiangang Shen
- School of Chinese Medicine, the University of Hong Kong, PR China
- Shenzhen Institute of Research and Innovation (HKU-SIRI), University of Hong Kong, Hong Kong, PR China
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23
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Esquiva G, Grayston A, Rosell A. Revascularization and endothelial progenitor cells in stroke. Am J Physiol Cell Physiol 2018; 315:C664-C674. [PMID: 30133323 DOI: 10.1152/ajpcell.00200.2018] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Stroke is one of the leading causes of death and disability worldwide. Tremendous improvements have been achieved in the acute care of stroke patients with the implementation of stroke units, thrombolytic drugs, and endovascular trombectomies. However, stroke survivors with neurological deficits require long periods of neurorehabilitation, which is the only approved therapy for poststroke recovery. With this scenario, more treatments are urgently needed, and only the understanding of the mechanisms of brain recovery might contribute to identify new therapeutic agents. Fortunately, brain injury after stroke is counteracted by the birth and migration of several populations of progenitor cells towards the injured areas, where angiogenesis and vascular remodeling play a key role providing trophic support and guidance during neurorepair. Endothelial progenitor cells (EPCs) constitute a pool of circulating bone-marrow derived cells that mobilize after an ischemic injury with the potential to incorporate into the damaged endothelium, to form new vessels, or to secrete trophic factors stimulating vessel remodeling. The circulating levels of EPCs are altered after stroke, and several subpopulations have proved to boost brain neurorepair in preclinical models of cerebral ischemia. The goal of this review is to discuss the current state of the neuroreparative actions of EPCs, focusing on their paracrine signaling mechanisms thorough their secretome and released extracellular vesicles.
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Affiliation(s)
- Gema Esquiva
- Neurovascular Research Laboratory and Neurology Department, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona , Barcelona , Spain
| | - Alba Grayston
- Neurovascular Research Laboratory and Neurology Department, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona , Barcelona , Spain
| | - Anna Rosell
- Neurovascular Research Laboratory and Neurology Department, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona , Barcelona , Spain
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24
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Jiang RH, Wu CJ, Xu XQ, Lu SS, Zu QQ, Zhao LB, Wang J, Liu S, Shi HB. Hypoxic conditioned medium derived from bone marrow mesenchymal stromal cells protects against ischemic stroke in rats. J Cell Physiol 2018; 234:1354-1368. [PMID: 30076722 DOI: 10.1002/jcp.26931] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 06/12/2018] [Indexed: 12/13/2022]
Abstract
In recent years, studies have shown that the secretome of bone marrow mesenchymal stromal cells (BMSCs) contains many growth factors, cytokines, and antioxidants, which may provide novel approaches to treat ischemic diseases. Furthermore, the secretome may be modulated by hypoxic preconditioning. We hypothesized that conditioned medium (CM) derived from BMSCs plays a crucial role in reducing tissue damage and improving neurological recovery after ischemic stroke and that hypoxic preconditioning of BMSCs robustly improves these activities. Rats were subjected to ischemic stroke by middle cerebral artery occlusion and then intravenously administered hypoxic CM, normoxic CM, or Dulbecco modified Eagle medium (DMEM, control). Cytokine antibody arrays and label-free quantitative proteomics analysis were used to compare the differences between hypoxic CM and normoxic CM. Injection of normoxic CM significantly reduced the infarct area and improved neurological recovery after stroke compared with administering DMEM. These outcomes may be associated with the attenuation of apoptosis and promotion of angiogenesis. Hypoxic preconditioning significantly enhanced these therapeutic effects. Fourteen proteins were significantly increased in hypoxic CM compared with normoxic CM as measured by cytokine arrays. The label-free quantitative proteomics analysis revealed 163 proteins that were differentially expressed between the two groups, including 107 upregulated proteins and 56 downregulated proteins. Collectively, our results demonstrate that hypoxic CM protected brain tissue from ischemic injury and promoted functional recovery after stroke in rats and that hypoxic CM may be the basis of a potential therapy for stroke patients.
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Affiliation(s)
- Run-Hao Jiang
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Chen-Jiang Wu
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xiao-Quan Xu
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Shan-Shan Lu
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Qing-Quan Zu
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Lin-Bo Zhao
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jun Wang
- Department of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Sheng Liu
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Hai-Bin Shi
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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25
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Thurgur H, Pinteaux E. Microglia in the Neurovascular Unit: Blood-Brain Barrier-microglia Interactions After Central Nervous System Disorders. Neuroscience 2018; 405:55-67. [PMID: 31007172 DOI: 10.1016/j.neuroscience.2018.06.046] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 06/26/2018] [Accepted: 06/27/2018] [Indexed: 12/11/2022]
Abstract
Over the past few decades, microglial cells have been regarded as the main executor of inflammation after acute and chronic central nervous system (CNS) disorders, responding rapidly to exogenous stimuli during acute trauma or infections, or signals released by cells undergoing cell death during conditions such as stroke, Alzheimer's disease (AD) and Parkinson's disease (PD). Barriers of the nervous system, and in particular the blood-brain barrier (BBB), play a key role in the normal physiological and cognitive functions of the brain. Being at the interface between the central and peripheral compartment, the BBB is regarded as a sensor of homeostasis, and any disruption within the brain or the systemic compartment triggers BBB dysfunction and neuroinflammation, both contributing to the pathogenesis of cerebrovascular disease. This involves a dynamic response mediated by all components of the neurovascular unit (NVU), and ongoing research suggests that BBB-microglia interaction is critical to dictate the microglial response to NVU injury. The present review aims to give an up-to-date account of the emerging critical role of BBB-microglia interactions during neuroinflammation, and how these could be targeted for the therapeutic treatment of major central inflammatory disease.
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Affiliation(s)
- Hannah Thurgur
- Faculty of Biology, Medicine and Health, AV Hill Building, The University of Manchester, United Kingdom
| | - Emmanuel Pinteaux
- Faculty of Biology, Medicine and Health, AV Hill Building, The University of Manchester, United Kingdom.
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26
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Li Y, Chang S, Li W, Tang G, Ma Y, Liu Y, Yuan F, Zhang Z, Yang GY, Wang Y. cxcl12-engineered endothelial progenitor cells enhance neurogenesis and angiogenesis after ischemic brain injury in mice. Stem Cell Res Ther 2018; 9:139. [PMID: 29751775 PMCID: PMC5948880 DOI: 10.1186/s13287-018-0865-6] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 03/08/2018] [Accepted: 04/10/2018] [Indexed: 12/31/2022] Open
Abstract
Background Ischemic stroke causes a multitude of brain damage. Neurovascular injury and myelin sheath degradation are two manifestations of ischemic brain damage. Therapeutic strategies aiming only at repairing the neural components or the vessels cannot efficiently restore neurological function. Endothelial progenitor cells (EPCs) have the advantages of both promoting angiogenesis and secreting trophic factors that would promote neurogenesis. Chemokine cxcl12 gene therapy has also been shown to promote angiogenesis, neurogenesis, and remyelination, attracting EPCs, neural progenitor cells, and oligodendrocyte progenitor cells (OPCs) to the injured sites of the brain. In this work, we tested whether these two therapeutics can be combined by genetically engineering the EPCs with cxcl12 to harness the synergistic effects of these two interventions. Methods We used lentivirus (LV) to deliver cxcl12 gene into human umbilical cord blood EPCs to generate the engineered CXCL12-EPCs, which were then delivered into the perifocal region at 1 week after permanent middle cerebral artery occlusion to investigate the effects of CXCL12-EPCs on the functional recovery and angiogenesis, neurogenesis, and remyelination in ischemic stroke mice. Green fluorescent protein (gfp) gene-modified EPCs and LV-CXCL12 gene therapy were used as controls. Results CXCL12-EPC treatment significantly reduced brain atrophy and improved neurobehavioral function at 5 weeks after brain ischemia. The treatment resulted in increased blood vessel density and myelin sheath integrity, and promoted neurogenesis, angiogenesis, and the proliferation and migration of OPCs. In-vitro data showed that CXCL12-EPCs performed better in proliferation and tube formation assays and expressed a higher level of vascular endothelial growth factor compared to GFP-EPCs. Conclusions The synergistic treatment of CXCL12-EPCs outperformed the single therapies of GFP-EPCs or LV-CXCL12 gene therapy in various aspects related to post-ischemic brain repair. cxcl12-engineered EPCs hold great potential in the treatment of ischemic stroke.
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Affiliation(s)
- Yaning Li
- School of Biomedical Engineering and Shanghai Jiao Tong University, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Shuang Chang
- School of Biomedical Engineering and Shanghai Jiao Tong University, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Wanlu Li
- School of Biomedical Engineering and Shanghai Jiao Tong University, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Guanghui Tang
- School of Biomedical Engineering and Shanghai Jiao Tong University, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Yuanyuan Ma
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Yanqun Liu
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Fang Yuan
- School of Biomedical Engineering and Shanghai Jiao Tong University, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Zhijun Zhang
- School of Biomedical Engineering and Shanghai Jiao Tong University, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Guo-Yuan Yang
- School of Biomedical Engineering and Shanghai Jiao Tong University, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China. .,Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China.
| | - Yongting Wang
- School of Biomedical Engineering and Shanghai Jiao Tong University, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China.
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27
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Zhang LY, Lin P, Pan J, Ma Y, Wei Z, Jiang L, Wang L, Song Y, Wang Y, Zhang Z, Jin K, Wang Q, Yang GY. CLARITY for High-resolution Imaging and Quantification of Vasculature in the Whole Mouse Brain. Aging Dis 2018; 9:262-272. [PMID: 29896415 PMCID: PMC5963347 DOI: 10.14336/ad.2017.0613] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 06/13/2017] [Indexed: 12/11/2022] Open
Abstract
Elucidating the normal structure and distribution of cerebral vascular system is fundamental for understanding its function. However, studies on visualization and whole-brain quantification of vasculature with cellular resolution are limited. Here, we explored the structure of vasculature at the whole-brain level using the newly developed CLARITY technique. Adult male C57BL/6J mice undergoing transient middle cerebral artery occlusion and Tie2-RFP transgenic mice were used. Whole mouse brains were extracted for CLARITY processing. Immunostaining was performed to label vessels. Customized MATLAB code was used for image processing and quantification. Three-dimensional images were visualized using the Vaa3D software. Our results showed that whole mouse brain became transparent using the CLARITY method. Three-dimensional imaging and visualization of vasculature were achieved at the whole-brain level with a 1-μm voxel resolution. The quantitative results showed that the fractional vascular volume was 0.018 ± 0.004 mm3 per mm3, the normalized vascular length was 0.44 ± 0.04 m per mm3, and the mean diameter of the microvessels was 4.25 ± 0.08 μm. Furthermore, a decrease in the fractional vascular volume and a decrease in the normalized vascular length were found in the penumbra of ischemic mice compared to controls (p < 0.05). In conclusion, CLARITY provides a novel approach for mapping vasculature in the whole mouse brain at cellular resolution. CLARITY-optimized algorithms facilitate the assessment of structural change in vasculature after brain injury.
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Affiliation(s)
- Lin-Yuan Zhang
- 1Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Pan Lin
- 2Medical Image Computing Lab and
| | - Jiaji Pan
- 3Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Yuanyuan Ma
- 1Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhenyu Wei
- 4Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201999, China
| | - Lu Jiang
- 3Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Liping Wang
- 1Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yaying Song
- 1Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yongting Wang
- 3Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Zhijun Zhang
- 3Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Kunlin Jin
- 5Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, TX76107, USA
| | | | - Guo-Yuan Yang
- 1Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,3Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
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28
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Yuan F, Chang S, Luo L, Li Y, Wang L, Song Y, Qu M, Zhang Z, Yang GY, Wang Y. cxcl12 gene engineered endothelial progenitor cells further improve the functions of oligodendrocyte precursor cells. Exp Cell Res 2018; 367:222-231. [PMID: 29614310 DOI: 10.1016/j.yexcr.2018.03.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 03/28/2018] [Accepted: 03/30/2018] [Indexed: 11/18/2022]
Abstract
Oligodendrocyte precursor cells (OPCs) are needed for white matter repair after various brain injury. Means that promote OPC functions could benefit white matter recovery after injury. Chemokine CXCL12 and endothelial progenitor cells (EPCs) both have been shown to promote remyelination. We hypothesize that the beneficial effects of EPCs and CXCL12 can be harnessed by genetically modifying EPCs with cxcl12 to synergistically improve the functions of OPCs. In this work, CXCL12-EPC was generated using virus-mediated gene transfer. OPCs were cultured with CXCL12-EPC conditioned media (CM) to analyze its impact on the proliferation, migration, differentiation and survival properties of OPCs. We blocked or knocked-down the receptors of CXCL12, namely CXCR4 and CXCR7, respectively to investigate their functions in regulating OPCs properties. Results revealed that CXCL12-EPC CM further promoted OPCs behavioral properties and upregulated the expression of PDGFR-α, bFGF, CXCR4 and CXCR7 in OPCs, albeit following different time course. Blocking CXCR4 diminished the beneficial effects of CXCL12 on OPCs proliferation and migration, while knocking down CXCR7 inhibited OPCs differentiation. Our results supported that cxcl12 gene modification of EPCs further promoted EPCs' ability in augmenting the remyelination properties of OPCs, suggesting that CXCL12-EPC hold great potential in white matter repair.
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Affiliation(s)
- Fang Yuan
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Shuang Chang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Longlong Luo
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Yaning Li
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Liping Wang
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Yaying Song
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Meijie Qu
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Zhijun Zhang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Guo-Yuan Yang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200030, China; Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China.
| | - Yongting Wang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200030, China.
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29
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Wang L, Mu Z, Lin X, Geng J, Xiao TQ, Zhang Z, Wang Y, Guan Y, Yang GY. Simultaneous Imaging of Cerebrovascular Structure and Function in Hypertensive Rats Using Synchrotron Radiation Angiography. Front Aging Neurosci 2017; 9:359. [PMID: 29163140 PMCID: PMC5673661 DOI: 10.3389/fnagi.2017.00359] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 10/19/2017] [Indexed: 12/12/2022] Open
Abstract
Hypertension has a profound influence on the structure and function of blood vessels. Cerebral vessels undergo both structural and functional changes in hypertensive animals. However, dynamic changes of cerebrovasculature and the factors involved in this process are largely unknown. In this study, we explored the dynamic changes of vascular structure in hypertensive rats using novel synchrotron radiation angiography. Twenty-four spontaneously hypertensive rats (SHR) and 24 Sprague–Dawley (SD) rats underwent synchrotron radiation (SR) angiography. Each group had 8 animals. We studied the cerebral vascular changes in SHR over a time period of 3–12-month and performed quantitative analysis. No vascular morphology differences between SHR and SD rats were observed in the early stage of hypertension. The number of twisted blood vessels in the front brain significantly increased at the 9- and 12-month observation time-points in the SHR compared to the SD rats (p < 0.01). The vessel density of the cortex and the striatum in SHR was consistently higher than that in SD rats at time points of 3-, 9-, and 12-month (p < 0.001). Vascular elasticity decreased both in SHR and SD rats with aging. There were statistically significant differences in the relative vascular elasticity of extracranial/intracranial internal carotid artery, middle cerebral artery, posterior cerebral artery and anterior cerebral artery between SHR and SD rats at 12-month (p < 0.01). We concluded that the dynamic vascular alterations detected by SR angiography provided novel imaging data for the study of hypertension in vivo. The longer the course of hypertension was, the more obvious the vascular differences between the SHR and the SD rats became.
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Affiliation(s)
- Liping Wang
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Zhihao Mu
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.,Department of Pathology and Pathophysiology, Faculty of Basic Medical Sciences, Kunming Medical University, Kunming, China
| | - Xiaojie Lin
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Jieli Geng
- Department of Neurology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ti Qiao Xiao
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, CAS, Shanghai, China
| | - Zhijun Zhang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yongting Wang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yongjing Guan
- Department of Radiology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Guo-Yuan Yang
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
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30
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Sarmah D, Kaur H, Saraf J, Pravalika K, Goswami A, Kalia K, Borah A, Wang X, Dave KR, Yavagal DR, Bhattacharya P. Getting Closer to an Effective Intervention of Ischemic Stroke: The Big Promise of Stem Cell. Transl Stroke Res 2017; 9:356-374. [PMID: 29075984 DOI: 10.1007/s12975-017-0580-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 10/12/2017] [Accepted: 10/17/2017] [Indexed: 12/13/2022]
Abstract
Stem cell therapy for ischemic stroke has widely been explored. Results from both preclinical and clinical studies have immensely supported the judicious use of stem cells as therapy. These provide an attractive means for preserving and replacing the damaged brain tissues following an ischemic attack. Since the past few years, researchers have used various types of stem cells to replenish insulted neuronal and glial cells in neurological disorders. In the present review, we discuss different types of stem cells employed for the treatment of ischemic stroke and mechanisms and challenges these cells face once introduced into the living system. Further, we also present different ways to maneuver and overcome challenges to translate the advances made at the preclinical level to clinics.
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Affiliation(s)
- Deepaneeta Sarmah
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) Ahmedabad, Gandhinagar, Gujarat, 382355, India
| | - Harpreet Kaur
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) Ahmedabad, Gandhinagar, Gujarat, 382355, India
| | - Jackson Saraf
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) Ahmedabad, Gandhinagar, Gujarat, 382355, India
| | - Kanta Pravalika
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) Ahmedabad, Gandhinagar, Gujarat, 382355, India
| | - Avirag Goswami
- Department of Neurology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Kiran Kalia
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) Ahmedabad, Gandhinagar, Gujarat, 382355, India
| | - Anupom Borah
- Cellular and Molecular Neurobiology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, India
| | - Xin Wang
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Kunjan R Dave
- Department of Neurology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Dileep R Yavagal
- Department of Neurology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Pallab Bhattacharya
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) Ahmedabad, Gandhinagar, Gujarat, 382355, India.
- Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.
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Optogenetic Inhibition of Striatal Neuronal Activity Improves the Survival of Transplanted Neural Stem Cells and Neurological Outcomes after Ischemic Stroke in Mice. Stem Cells Int 2017; 2017:4364302. [PMID: 29104593 PMCID: PMC5618753 DOI: 10.1155/2017/4364302] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 06/25/2017] [Accepted: 07/18/2017] [Indexed: 01/19/2023] Open
Abstract
Neural stem cell (NSC) transplantation is a promising treatment to improve the recovery after brain ischemia. However, how the survival, proliferation, migration, and differentiation of implanted NSC are influenced by endogenous neuronal activity remains unclear. In this work, we used optogenetic techniques to control the activity of striatal neurons and investigated how their activity affected the survival and migration of transplanted NSCs and overall neurological outcome after ischemic stroke. NSCs cultured from transgenic mice expressing fluorescent protein were transplanted into the peri-infarct region of the striatum after transient middle cerebral artery occlusion (tMCAO) surgery. The striatal neurons were excited or inhibited for 15 minutes daily via implanted optical fiber after tMCAO. The results revealed that mice which received NSC transplantation and optogenetic inhibition had smaller brain infarct volume and increased NSC migration compared to the NSC alone or PBS group (p < 0.05). In contrast, mice which received NSC transplantation and optogenetic excitation showed no difference in infarct volume and neurological behavior improvement compared to the PBS control group. In vitro experiments further revealed that the conditioned media from excited GABAergic neurons reduced NSC viability through paracrine mechanisms. Conclusion. Optogenetic inhibition of striatal neuronal activity further improved neurological recovery after NSC transplantation at the subacute phase after brain ischemia.
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Geng J, Wang L, Qu M, Song Y, Lin X, Chen Y, Mamtilahun M, Chen S, Zhang Z, Wang Y, Yang GY. Endothelial progenitor cells transplantation attenuated blood-brain barrier damage after ischemia in diabetic mice via HIF-1α. Stem Cell Res Ther 2017; 8:163. [PMID: 28697748 PMCID: PMC5505148 DOI: 10.1186/s13287-017-0605-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 04/20/2017] [Accepted: 06/07/2017] [Indexed: 12/20/2022] Open
Abstract
Background Blood-brain barrier impairment is a major indicator of endothelial dysfunction in diabetes. Studies showed that endothelial progenitor cell (EPC) transplantation promoted angiogenesis and improved function recovery after hind limb ischemia in diabetic mice. The effect of EPC transplantation on blood-brain barrier integrity after cerebral ischemia in diabetic animals is unknown. The aim of this study is to explore the effect of EPC transplantation on the integrity of the blood-brain barrier after cerebral ischemia in diabetic mice. Methods EPCs were isolated by density gradient centrifugation and characterized by flow cytometry and immunostaining. Diabetes was induced in adult male C57BL/6 mice by a single injection of streptozotocin at 4 weeks before surgery. Diabetic mice underwent 90-minute transient middle cerebral artery occlusion surgery and received 1 × 106 EPCs transplantation immediately after reperfusion. Brain infarct volume, blood-brain barrier permeability, tight junction protein expression, and hypoxia inducible factor-1α (HIF-1α) mRNA level were examined after treatment. Results We demonstrated that neurological deficits were attenuated and brain infarct volume was reduced in EPC-transplanted diabetic mice after transient cerebral ischemia compared to the controls (p < 0.05). Blood-brain barrier leakage and tight junction protein degradation were reduced in EPC-transplanted mice (p <0.05). EPCs upregulated HIF-1α expression while HIF-1α inhibitor PX-478 abolished the beneficial effect of EPCs. Conclusions We conclude that EPCs protected blood-brain barrier integrity after focal ischemia in diabetic mice through upregulation of HIF-1α signaling.
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Affiliation(s)
- Jieli Geng
- Department of Neurology, Shanghai Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, China.,Department of Neurology, Shanghai Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Liping Wang
- Department of Neurology, Shanghai Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, China.,Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Meijie Qu
- Department of Neurology, Shanghai Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, China.,Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Yaying Song
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Xiaojie Lin
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Yajing Chen
- Department of Neurology, Shanghai Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, China.,Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Muyassar Mamtilahun
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Shengdi Chen
- Department of Neurology, Shanghai Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, China
| | - Zhijun Zhang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China
| | - Yongting Wang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China.
| | - Guo-Yuan Yang
- Department of Neurology, Shanghai Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, China. .,Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China.
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Cai H, Ma Y, Jiang L, Mu Z, Jiang Z, Chen X, Wang Y, Yang GY, Zhang Z. Hypoxia Response Element-Regulated MMP-9 Promotes Neurological Recovery via Glial Scar Degradation and Angiogenesis in Delayed Stroke. Mol Ther 2017; 25:1448-1459. [PMID: 28396199 DOI: 10.1016/j.ymthe.2017.03.020] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 03/10/2017] [Accepted: 03/10/2017] [Indexed: 12/14/2022] Open
Abstract
Matrix metalloproteinase 9 (MMP-9) plays a beneficial role in the delayed phase of middle cerebral artery occlusion (MCAO). However, the mechanism is obscure. Here, we constructed hypoxia response element (HRE)-regulated MMP-9 to explore its effect on glial scars and neurogenesis in delayed ischemic stroke. Adult male Institute of Cancer Research (ICR) mice underwent MCAO and received a stereotactic injection of lentivirus carrying HRE-MMP-9 or normal saline (NS)/lentivirus-GFP 7 days after ischemia. We found that HRE-MMP-9 improved neurological outcomes, reduced ischemia-induced brain atrophy, and degraded glial scars (p < 0.05). Furthermore, HRE-MMP-9 increased the number of microvessels in the peri-infarct area (p < 0.001), which may have been due to the accumulation of endogenous endothelial progenitor cells (EPCs) in the peri-infarct area after glial scar degradation. Finally, HRE-MMP-9 increased the number of bromodeoxyuridine-positive (BrdU+)/NeuN+ cells and the expression of PSD-95 in the peri-infarct area (p < 0.01). These changes could be blocked by vascular endothelial growth factor receptor 2 (VEGFR2) inhibitor SU5416 and MMP-9 inhibitor 2-[[(4-phenoxyphenyl)sulfonyl]methyl]-thiirane (SB-3CT). Our results provided a novel mechanism by which glial scar degradation and vascular endothelial growth factor (VEGF)/VEGFR2-dependent angiogenesis may be key procedures for neurological recovery in delayed ischemic stroke after HRE-MMP-9 treatment. Therefore, HRE-MMP-9 overexpression in the delayed ischemic brain is a promising approach for neurological recovery.
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Affiliation(s)
- Hongxia Cai
- Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; Department of Neurology, Yangzhou University Affiliated Hospital, Yangzhou No. 1 People's Hospital, Jiangsu Province, 225000, China
| | - Yuanyuan Ma
- Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; Neuroscience and Neuroengineering Center, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Lu Jiang
- Neuroscience and Neuroengineering Center, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Zhihao Mu
- Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; Neuroscience and Neuroengineering Center, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Zhen Jiang
- Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; Neuroscience and Neuroengineering Center, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Xiaoyan Chen
- Neuroscience and Neuroengineering Center, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Yongting Wang
- Neuroscience and Neuroengineering Center, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Guo-Yuan Yang
- Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; Neuroscience and Neuroengineering Center, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China.
| | - Zhijun Zhang
- Neuroscience and Neuroengineering Center, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China.
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He X, Lu Y, Lin X, Jiang L, Tang Y, Tang G, Chen X, Zhang Z, Wang Y, Yang GY. Optical inhibition of striatal neurons promotes focal neurogenesis and neurobehavioral recovery in mice after middle cerebral artery occlusion. J Cereb Blood Flow Metab 2017; 37:837-847. [PMID: 27055780 PMCID: PMC5363463 DOI: 10.1177/0271678x16642242] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Striatal neurons regulate the activity of neural progenitor cells in the subventricular zone, but the effect of striatal neuronal activity on neurogenesis after ischemic stroke is unclear. In this study, we used optogenetic tools to investigate the impact of striatal neuronal activity on the neurogenesis and functional recovery after cerebral ischemia. We transfected striatal neurons with channelrhodopsin-2 or halorhodopsin from Natronomonas so that they can be excited by 473 nm laser or inhibited by 594 nm laser, respectively. Neural inhibition but not excitation at 4-7 days after middle cerebral artery occlusion resulted in reduced atrophy volume (6.8 ± 0.7 vs 8.5 ± 1.2 mm3, p < 0.05) and better performance represented by longer sustaining time on rotarod (99.3 ± 9 vs 80.1 ± 11 s, p < 0.01) and faster moving speed (7.7 ± 2 vs 5.7 ± 1.1 cm/s, p < 0.05) in open field tests. Furthermore, neural inhibition increased the number of nestin+, BrdU+/doublecortin+ and BrdU+/NeuN+ cells ( p < 0.001) in the subventricular zone and peri-focal region, and the expression level of axon guidance factor Netrin-1 (0.39 ± 0.16 vs 0.16 ± 0.02, p < 0.05) in the peri-focal region. These data suggest that striatal neuronal activity plays an important role in regulating neurogenesis and neural-behavioral outcomes, and that inhibiting striatal neurons by optogenetics promotes the recovery after ischemic stroke in mice.
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Affiliation(s)
- Xiaosong He
- 1 Department of Human Anatomy, Guangzhou Medical University, Guangzhou, China.,2 Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yifan Lu
- 2 Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaojie Lin
- 2 Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Lu Jiang
- 2 Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yaohui Tang
- 2 Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Guanghui Tang
- 2 Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoyan Chen
- 2 Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Zhijun Zhang
- 2 Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yongting Wang
- 2 Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.,3 Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
| | - Guo-Yuan Yang
- 2 Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.,4 Shanghai Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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Zhao WN, Xu SQ, Liang JF, Peng L, Liu HL, Wang Z, Fang Q, Wang M, Yin WQ, Zhang WJ, Lou JN. Endothelial progenitor cells from human fetal aorta cure diabetic foot in a rat model. Metabolism 2016; 65:1755-1767. [PMID: 27832863 DOI: 10.1016/j.metabol.2016.09.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Revised: 09/03/2016] [Accepted: 09/13/2016] [Indexed: 12/26/2022]
Abstract
OBJECTIVE Recent evidence has suggested that circulating endothelial progenitor cells (EPCs) can repair the arterial endothelium during vascular injury. However, a reliable source of human EPCs is needed for therapeutic applications. In this study, we isolated human fetal aorta (HFA)-derived EPCs and analyzed the capacity of EPCs to differentiate into endothelial cells. In addition, because microvascular dysfunction is considered to be the major cause of diabetic foot (DF), we investigated whether transplantation of HFA-derived EPCs could treat DF in a rat model. METHODS EPCs were isolated from clinically aborted fetal aorta. RT-PCR, fluorescence-activated cell sorting, immunofluorescence, and an enzyme-linked immunosorbent assay were used to examine the expressions of CD133, CD34, CD31, Vascular Endothelial Growth Factor Receptor 2 (VEGFR2), von Willebrand Factor (vWF), and Endothelial Leukocyte Adhesion Molecule-1 (ELAM-1). Morphology and Dil-uptake were used to assess function of the EPCs. We then established a DF model by injecting microcarriers into the hind-limb arteries of Goto-Kakizaki rats and then transplanting the cultured EPCs into the ischemic hind limbs. Thermal infrared imaging, oxygen saturation apparatus, and laser Doppler perfusion imaging were used to monitor the progression of the disease. Immunohistochemistry was performed to examine the microvascular tissue formed by HFA-derived EPCs. RESULTS We found that CD133, CD34, and VEGFR2 were expressed by HFA-derived EPCs. After VEGF induction, CD133 expression was significantly decreased, but expression levels of vWF and ELAM-1 were markedly increased. Furthermore, tube formation and Dil-uptake were improved after VEGF induction. These observations suggest that EPCs could differentiate into endothelial cells. In the DF model, temperature, blood flow, and oxygen saturation were reduced but recovered to a nearly normal level following injection of the EPCs in the hind limb. Ischemic symptoms also improved. Injected EPCs were preferentially and durably engrafted into the blood vessels. In addition, anti-human CD31+-AMA+-vWF+ microvasculars were detected after transplantation of EPCs. CONCLUSION Early fetal aorta-derived EPCs possess strong self-renewal ability and can differentiate into endothelial cells. We demonstrated for the first time that transplanting HFA-derived EPCs could ameliorate DF prognosis in a rat model. These findings suggest that the transplantation of HFA-derived EPCs could serve as an innovative therapeutic strategy for managing DF.
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Affiliation(s)
- Wan-Ni Zhao
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing, China
| | - Shi-Qing Xu
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Jian-Feng Liang
- Department of Neurosurgery, Peking University International Hospital, Beijing, China
| | - Liang Peng
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Hong-Lin Liu
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Zai Wang
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Qing Fang
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Meng Wang
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China; Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Wei-Qin Yin
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China; Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Wen-Jian Zhang
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China.
| | - Jin-Ning Lou
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing, China; Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China.
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Xiong X, Gu L, Wang Y, Luo Y, Zhang H, Lee J, Krams S, Zhu S, Zhao H. Glycyrrhizin protects against focal cerebral ischemia via inhibition of T cell activity and HMGB1-mediated mechanisms. J Neuroinflammation 2016; 13:241. [PMID: 27609334 PMCID: PMC5016958 DOI: 10.1186/s12974-016-0705-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 08/24/2016] [Indexed: 12/18/2022] Open
Abstract
Background Glycyrrhizin (Gly) protects against brain injury induced by stroke. We studied whether Gly achieves its protection by inhibiting T cell activity and high-mobility group box 1 (HMGB1) release in the ischemic brain. Methods Stroke was induced by transient middle cerebral artery occlusion in rats and mice. Gly was injected intraperitoneally before or after stroke. We measured infarction, neuroinflammatory cells, gene expressions of interferon-γ (IFNγ), IL-4, and IL-10 in CD4 T cells, HMGB1 release, and T cell proliferation in cultured splenocytes. Results Gly treatment reduced infarctions and neuroinflammation characterized by the infiltration of CD68-positive macrophages and myeloperoxidase-positive neutrophils, which corresponds to a reduction in the number of T cells and their subsets, CD4 and CD8 T cells, in the ischemic brain, as measured by flow cytometry. Unlike in wild-type animals, Gly did not offer protection in nude rats and severe combined immunodeficient (SCID) mice who had no T cells, while Gly reduced infarction in both nude rats and SCID mice whose T cells were reconstituted, suggesting that T cells should be the target of Gly. In addition, Gly administration inhibited T cell proliferation stimulated by ConA in in vitro assays and inhibited HMGB1 release from the ischemic brain. Furthermore, Gly attenuated gene expression of IFNγ, but not IL-4 and IL-10 in CD4 T cells. Lastly, HMGB1 promoted T cell proliferation stimulated by ConA, which was inhibited by the addition of Gly. Conclusions Gly blocks infarction by inhibiting IFNγ-mediated T cell activity, which is at least partly modulated by HMGB1 activity.
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Affiliation(s)
- Xiaoxing Xiong
- Department of Anesthesia, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, People's Republic of China.,Department of Neurosurgery and Stanford Stroke Center, Stanford University, 1201 Welch Rd, Stanford, CA, 94305, USA.,Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei, 430006, People's Republic of China
| | - Lijuan Gu
- Department of Neurosurgery and Stanford Stroke Center, Stanford University, 1201 Welch Rd, Stanford, CA, 94305, USA.,Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei, 430006, People's Republic of China
| | - Yan Wang
- Department of Neurosurgery and Stanford Stroke Center, Stanford University, 1201 Welch Rd, Stanford, CA, 94305, USA
| | - Ying Luo
- Department of Neurosurgery and Stanford Stroke Center, Stanford University, 1201 Welch Rd, Stanford, CA, 94305, USA
| | - Hongfei Zhang
- Department of Neurosurgery and Stanford Stroke Center, Stanford University, 1201 Welch Rd, Stanford, CA, 94305, USA.,Department of Anesthesiology, Zhujiang Hospital of Southern Medical University, Guangzhou, Guangdong, 510280, People's Republic of China
| | - Jessica Lee
- Department of Neurosurgery and Stanford Stroke Center, Stanford University, 1201 Welch Rd, Stanford, CA, 94305, USA
| | - Sheri Krams
- Department of Surgery, Stanford University, Stanford, CA, 94305, USA
| | - Shengmei Zhu
- Department of Anesthesia, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, People's Republic of China.
| | - Heng Zhao
- Department of Neurosurgery and Stanford Stroke Center, Stanford University, 1201 Welch Rd, Stanford, CA, 94305, USA.
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Takizawa S, Nagata E, Nakayama T, Masuda H, Asahara T. Recent Progress in Endothelial Progenitor Cell Culture Systems: Potential for Stroke Therapy. Neurol Med Chir (Tokyo) 2016; 56:302-9. [PMID: 27041632 PMCID: PMC4908073 DOI: 10.2176/nmc.ra.2016-0027] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Endothelial progenitor cells (EPCs) participate in endothelial repair and angiogenesis due to their abilities to differentiate into endothelial cells and to secrete protective cytokines and growth factors. Consequently, there is considerable interest in cell therapy with EPCs isolated from peripheral blood to treat various ischemic injuries. Quality and quantity-controlled culture systems to obtain mononuclear cells enriched in EPCs with well-defined angiogenic and anti-inflammatory phenotypes have recently been developed, and increasing evidence from animal models and clinical trials supports the idea that transplantation of EPCs contributes to the regenerative process in ischemic organs and is effective for the therapy of ischemic cerebral injury. Here, we briefly describe the general characteristics of EPCs, and we review recent developments in culture systems and applications of EPCs and EPC-enriched cell populations to treat ischemic stroke.
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Affiliation(s)
- Shunya Takizawa
- Department of Neurology, Tokai University School of Medicine
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38
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Ding J, Zhao Z, Wang C, Wang CX, Li PC, Qian C, Teng GJ. Bioluminescence imaging of transplanted human endothelial colony-forming cells in an ischemic mouse model. Brain Res 2016; 1642:209-218. [PMID: 27038754 DOI: 10.1016/j.brainres.2016.03.045] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 02/12/2016] [Accepted: 03/28/2016] [Indexed: 01/09/2023]
Abstract
Ischemic strokes are devastating events responsible for high mortality and morbidity worldwide each year. Endothelial colony-forming cell (ECFC) therapy holds promise for stroke treatment; however, grafted ECFCs need to be monitored better understand their biological behavior in vivo, so as to evaluate their safety and successful delivery. The objectives of this study are to visualize the fate of infused human cord blood derived ECFCs via bioluminescence imaging (BLI) in an ischemic stroke mouse model and to determine the therapeutic effects of ECFC transplantation. ECFCs derived from human umbilical cord blood were infected with lentivirus carrying enhanced green fluorescent protein (eGFP) and firefly luciferase (Luc2) double fusion reporter gene. Labeled ECFCs were grafted into a photothrombotic ischemic stroke mouse model via intra-arterial injection though the left cardiac ventricle. The homing of infused cells and functional recovery of stroke mice were evaluated using BLI, neurological scoring, and immunohistochemistry. Significantly, BLI signals were highest in the brain on day 1 and decreased steadily until day 14. GFP-positive cells were also found surrounding infarct border zones in brain sections using immunohistochemical staining, suggesting that ECFCs properly homed to the ischemic brain tissue. Using a modified neurological severity score assay and histological analysis of brain slices with CD31 immunostaining in brain tissue, double cortin analysis, and the TdT-mediated dUTP nick end labeling (TUNEL) assay, we demonstrated functional restoration, improved angiogenesis, neurogenesis, and decreased apoptosis in ischemic mice after ECFC infusion. Collectively, our data support that ECFCs may be a promising therapeutic agent for stroke.
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Affiliation(s)
- Jie Ding
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, China
| | - Zhen Zhao
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, China
| | - Chao Wang
- Education Ministry's Key Laboratory of Developmental Genes and Human Diseases, Institute of Life Sciences, Southeast University, Nanjing, China
| | - Cong-Xiao Wang
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, China
| | - Pei-Cheng Li
- Department of Interventional Radiology, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Cheng Qian
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, China
| | - Gao-Jun Teng
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, China.
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Ma Y, Li Y, Jiang L, Wang L, Jiang Z, Wang Y, Zhang Z, Yang GY. Macrophage depletion reduced brain injury following middle cerebral artery occlusion in mice. J Neuroinflammation 2016; 13:38. [PMID: 26873581 PMCID: PMC4752808 DOI: 10.1186/s12974-016-0504-z] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 02/04/2016] [Indexed: 02/08/2023] Open
Abstract
Background Macrophages are involved in demyelination in many brain diseases. However, the role of macrophages in the recovery phase of the ischemic brain is unknown. The present study aims to explore the role of macrophages in the ischemic brain injury and tissue repair following a 90-min transient middle cerebral artery occlusion in mice. Methods Clodronate liposomes were injected into mice to deplete periphery macrophages. These mice subsequently underwent middle cerebral artery occlusion. F4/80+ and CD68+ cells were examined in the mouse spleen and brain to confirm macrophage depletion at 14 days after middle cerebral artery occlusion. Modified neurological severity scores were used to evaluate the behavioral function between 1 and 14 days after middle cerebral artery occlusion. MBP, Iba1, and CD31 immunostaining were performed to determine myelin lesion, microglia activation, and microvessel density. Results Clodronate liposomes depleted 80 % of the macrophages in the mouse spleen and reduced macrophage infiltration in the mouse brain. Macrophage depletion reduced the myelin damage in the ipsilateral striatum and microglia activation in both the ipsilateral cortex and striatum, enhanced the microvessel density in the peri-infarct region, attenuated brain atrophy, and promoted neurological recovery following middle cerebral artery occlusion. Conclusions Our results suggested that macrophage depletion is a potential intervention that can promote tissue repair and remodeling after brain ischemia, reduce demyelination and microglia activation, and enhance focal microvessel density. Electronic supplementary material The online version of this article (doi:10.1186/s12974-016-0504-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yuanyuan Ma
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, China.
| | - Yaning Li
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China.
| | - Lu Jiang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China.
| | - Liping Wang
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, China.
| | - Zhen Jiang
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, China.
| | - Yongting Wang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China.
| | - Zhijun Zhang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China.
| | - Guo-Yuan Yang
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, China. .,Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai, 200030, China.
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Ma Y, Wang J, Wang Y, Yang GY. The biphasic function of microglia in ischemic stroke. Prog Neurobiol 2016; 157:247-272. [PMID: 26851161 DOI: 10.1016/j.pneurobio.2016.01.005] [Citation(s) in RCA: 491] [Impact Index Per Article: 61.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 12/22/2015] [Accepted: 01/10/2016] [Indexed: 12/16/2022]
Abstract
Microglia are brain resident macrophages originated from primitive progenitor cells in the yolk sac. Microglia can be activated within hours and recruited to the lesion site. Traditionally, microglia activation is considered to play a deleterious role in ischemic stroke, as inhibition of microglia activation attenuates ischemia induced brain injury. However, increasing evidence show that microglia activation is critical for attenuating neuronal apoptosis, enhancing neurogenesis, and promoting functional recovery after cerebral ischemia. Differential polarization of microglia could likely explain the biphasic role of microglia in ischemia. We comprehensively reviewed the mechanisms involved in regulating microglia activation and polarization. The latest discoveries of microRNAs in modulating microglia function are discussed. In addition, the interaction between microglia and other cells including neurons, astrocytes, oligodendrocytes, and stem cells were also reviewed. Future therapies targeting microglia may not exclusively aim at suppressing microglia activation, but also at modulating microglia polarization at different stages of ischemic stroke. More work is needed to elucidate the cellular and molecular mechanisms of microglia polarization under ischemic environment. The roles of microRNAs and transplanted stem cells in mediating microglia activation and polarization during brain ischemia also need to be further studied.
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Affiliation(s)
- Yuanyuan Ma
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China; Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Jixian Wang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China; Department of Rehabilitation, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Yongting Wang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China.
| | - Guo-Yuan Yang
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China; Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China.
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41
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Di Santo S, Fuchs AL, Periasamy R, Seiler S, Widmer HR. The Cytoprotective Effects of Human Endothelial Progenitor Cell-Conditioned Medium Against an Ischemic Insult Are Not Dependent on VEGF and IL-8. Cell Transplant 2016; 25:735-47. [PMID: 26776768 DOI: 10.3727/096368916x690458] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Endothelial progenitor cells (EPCs) promote revascularization and tissue repair mainly by paracrine actions. In the present study, we investigated whether EPC-secreted factors in the form of conditioned medium (EPC-CM) can protect cultured brain microvascular endothelial cells against an ischemic insult. Furthermore, we addressed the type of factors that are involved in the EPC-CM-mediated functions. For that purpose, rat brain-derived endothelial cells (rBCEC4 cell line) were exposed to EPC-CM pretreated with proteolytic digestion, heat inactivation, and lipid extraction. Moreover, the involvement of VEGF and IL-8, as canonical angiogenic factors, was investigated by means of neutralizing antibodies. We demonstrated that EPC-CM significantly protected the rBCEC4 cells against an ischemic insult mimicked by induced oxygen-glucose deprivation followed by reoxygenation. The cytoprotective effect was displayed by higher viable cell numbers and reduced caspase 3/7 activity. Heat inactivation, proteolytic digestion, and lipid extraction resulted in a significantly reduced EPC-CM-dependent increase in rBCEC4 viability, tube formation, and survival following the ischemic challenge. Notably, VEGF and IL-8 neutralization did not affect the actions of EPC-CM on rBCEC4 under both standard and ischemic conditions. In summary, our findings show that paracrine factors released by EPCs activate an angiogenic and cytoprotective response on brain microvascular cells and that the activity of EPC-CM relies on the concerted action of nonproteinaceous and proteinaceous factors but do not directly involve VEGF and IL-8.
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Affiliation(s)
- Stefano Di Santo
- Department of Neurosurgery, Neurocenter and Regenerative Neuroscience Cluster, University of Bern, Inselspital, Bern, Switzerland
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42
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Park JS, Yang HN, Yi SW, Kim JH, Park KH. Neoangiogenesis of human mesenchymal stem cells transfected with peptide-loaded and gene-coated PLGA nanoparticles. Biomaterials 2016; 76:226-37. [DOI: 10.1016/j.biomaterials.2015.10.062] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 10/22/2015] [Accepted: 10/26/2015] [Indexed: 12/12/2022]
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Cai J, Wen J, Bauer E, Zhong H, Yuan H, Chen AF. The Role of HMGB1 in Cardiovascular Biology: Danger Signals. Antioxid Redox Signal 2015; 23:1351-69. [PMID: 26066838 DOI: 10.1089/ars.2015.6408] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
SIGNIFICANCE Cardiovascular disease (CVD) is the leading cause of mortality worldwide. Accumulating evidence shows that dysregulated immune response contributes to several types of CVDs such as atherosclerosis and pulmonary hypertension (PH). Vascular intimal impairment and low-density lipoprotein oxidation trigger a complex network of innate immune responses and sterile inflammation. RECENT ADVANCES High-mobility group box 1 (HMGB1), a nuclear DNA-binding protein, was recently discovered to function as a damage-associated molecular pattern molecule (DAMP) that initiates the innate immune responses. These findings lead to the understanding that HMGB1 plays a critical role in the inflammatory response in the pathogenesis of CVD. CRITICAL ISSUES In this review, we highlight the role of extracellular HMGB1 as a proinflammatory mediator as well as a DAMP in coronary artery disease, cerebral artery disease, peripheral artery disease, and PH. FUTURE DIRECTIONS A key focus for future researches on HMGB1 location, structure, modification, and signaling will reveal HMGB1's multiple functions and discover a targeted therapy that can eliminate HMGB1-mediated inflammation without interfering with adaptive immune responses.
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Affiliation(s)
- Jingjing Cai
- 1 The Center of Clinical Pharmacology, The Third Xiangya Hospital, Central South University , Changsha, China
- 2 Department of Surgery, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
- 3 Department of Cardiology, The Third Xiangya Hospital, Central South University , Changsha, China
| | - Juan Wen
- 1 The Center of Clinical Pharmacology, The Third Xiangya Hospital, Central South University , Changsha, China
- 3 Department of Cardiology, The Third Xiangya Hospital, Central South University , Changsha, China
| | - Eileen Bauer
- 2 Department of Surgery, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
| | - Hua Zhong
- 1 The Center of Clinical Pharmacology, The Third Xiangya Hospital, Central South University , Changsha, China
- 2 Department of Surgery, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
- 3 Department of Cardiology, The Third Xiangya Hospital, Central South University , Changsha, China
| | - Hong Yuan
- 1 The Center of Clinical Pharmacology, The Third Xiangya Hospital, Central South University , Changsha, China
- 3 Department of Cardiology, The Third Xiangya Hospital, Central South University , Changsha, China
| | - Alex F Chen
- 1 The Center of Clinical Pharmacology, The Third Xiangya Hospital, Central South University , Changsha, China
- 2 Department of Surgery, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
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Wang J, Xie L, Yang C, Ren C, Zhou K, Wang B, Zhang Z, Wang Y, Jin K, Yang GY. Activated regulatory T cell regulates neural stem cell proliferation in the subventricular zone of normal and ischemic mouse brain through interleukin 10. Front Cell Neurosci 2015; 9:361. [PMID: 26441532 PMCID: PMC4568339 DOI: 10.3389/fncel.2015.00361] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 08/28/2015] [Indexed: 11/23/2022] Open
Abstract
Recent studies have demonstrated that the depletion of Regulatory T cells (Tregs) inhibits neural progenitor cell migration after brain ischemia. However, whether Tregs affect neural stem/progenitor cell proliferation is unclear. We explored the effect of Tregs on neurogenesis in the subventricular zone (SVZ) after ischemia. Tregs were isolated and activated in vitro. Adult male C57BL/6 mice underwent 60 min transient middle cerebral artery occlusion (tMCAO). Then Tregs (1 × 105) were injected into the left lateral ventricle (LV) of normal and ischemic mouse brain. Neurogenesis was determined by immunostaining. The mechanism was examined by inhibiting interleukin 10 (IL-10) and transforming growth factor (TGF-β) signaling. We found that the number of BrdU+ cells in the SVZ was significantly increased in the activated Tregs-treated mice. Double immunostaining showed that these BrdU+ cells expressed Mash1. Blocking IL-10 reduced the number of Mash1+/BrdU+ cells, but increased the amount of GFAP+/BrdU+ cells. Here, we conclude that activated Tregs enhanced neural stem cell (NSC) proliferation in the SVZ of normal and ischemic mice; blockage of IL-10 abolished Tregs-mediated NSC proliferation in vivo and in vitro. Our results suggest that activated Tregs promoted NSC proliferation via IL-10, which provides a new therapeutic approach for ischemic stroke.
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Affiliation(s)
- Jixian Wang
- Department of Neurology, Shanghai Ruijin Hospital, Shanghai Jiao Tong University School of Medicine Shanghai, China ; Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University Shanghai, China ; Department of Pharmacology and Neuroscience, University of North Texas Health Science Center Fort Worth, TX, USA
| | - Luokun Xie
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center Fort Worth, TX, USA
| | - Chenqi Yang
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center Fort Worth, TX, USA
| | - Changhong Ren
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center Fort Worth, TX, USA
| | - Kaijing Zhou
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center Fort Worth, TX, USA
| | - Brian Wang
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center Fort Worth, TX, USA
| | - Zhijun Zhang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University Shanghai, China
| | - Yongting Wang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University Shanghai, China
| | - Kunlin Jin
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center Fort Worth, TX, USA
| | - Guo-Yuan Yang
- Department of Neurology, Shanghai Ruijin Hospital, Shanghai Jiao Tong University School of Medicine Shanghai, China ; Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University Shanghai, China
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Cai H, Mu Z, Jiang Z, Wang Y, Yang GY, Zhang Z. Hypoxia-controlled matrix metalloproteinase-9 hyperexpression promotes behavioral recovery after ischemia. Neurosci Bull 2015; 31:550-60. [PMID: 25975730 DOI: 10.1007/s12264-015-1533-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 04/17/2015] [Indexed: 01/03/2023] Open
Abstract
Matrix metalloproteinase-9 (MMP-9) plays a beneficial role in the sub-acute phase after ischemic stroke. However, unrestrained MMP-9 may disrupt the blood-brain barrier (BBB), which has limited its use for the treatment of brain ischemia. In the present study, we constructed lentivirus mediated hypoxia-controlled MMP-9 expression and explored its role after stroke. Hypoxia response element (HRE) was used to confine MMP-9 expression only to the hypoxic region of mouse brain after 120-min transient middle cerebral artery occlusion. Lentiviruses were injected into the peri-infarct area on day 7 after transient ischemia. We found hyperexpression of exogenous HRE-MMP-9 under the control of hypoxia, and its expression was mainly located in neurons and astrocytes without aggravation of BBB damage compared to the CMV group. Furthermore, mice in the HRE-MMP-9 group showed the best behavioral recovery compared with the normal saline, GFP, and SB-3CT groups. Therefore, hypoxia-controlled MMP-9 hyperexpression during the sub-acute phase of ischemia may provide a novel promising approach of gene therapy for stroke.
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Affiliation(s)
- Hongxia Cai
- Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.,Neuroscience and Neuroengineering Center, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Zhihao Mu
- Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.,Neuroscience and Neuroengineering Center, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Zhen Jiang
- Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.,Neuroscience and Neuroengineering Center, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Yongting Wang
- Neuroscience and Neuroengineering Center, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Guo-Yuan Yang
- Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China. .,Neuroscience and Neuroengineering Center, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China.
| | - Zhijun Zhang
- Neuroscience and Neuroengineering Center, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China.
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46
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Li X, Yue Y, Zhu Y, Xiong S. Extracellular, but not intracellular HMGB1, facilitates self-DNA induced macrophage activation via promoting DNA accumulation in endosomes and contributes to the pathogenesis of lupus nephritis. Mol Immunol 2015; 65:177-88. [DOI: 10.1016/j.molimm.2015.01.023] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Revised: 01/18/2015] [Accepted: 01/19/2015] [Indexed: 01/01/2023]
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Galectin-1-secreting neural stem cells elicit long-term neuroprotection against ischemic brain injury. Sci Rep 2015; 5:9621. [PMID: 25858671 PMCID: PMC4392363 DOI: 10.1038/srep09621] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 03/09/2015] [Indexed: 12/20/2022] Open
Abstract
Galectin-1 (gal-1), a special lectin with high affinity to β-galactosides, is implicated in protection against ischemic brain injury. The present study investigated transplantation of gal-1-secreting neural stem cell (s-NSC) into ischemic brains and identified the mechanisms underlying protection. To accomplish this goal, secretory gal-1 was stably overexpressed in NE-4C neural stem cells. Transient cerebral ischemia was induced in mice by middle cerebral artery occlusion for 60 minutes and s-NSCs were injected into the striatum and cortex within 2 hours post-ischemia. Brain infarct volume and neurological performance were assessed up to 28 days post-ischemia. s-NSC transplantation reduced infarct volume, improved sensorimotor and cognitive functions, and provided more robust neuroprotection than non-engineered NSCs or gal-1-overexpressing (but non-secreting) NSCs. White matter injury was also ameliorated in s-NSC-treated stroke mice. Gal-1 modulated microglial function in vitro, by attenuating secretion of pro-inflammatory cytokines (TNF-α and nitric oxide) in response to LPS stimulation and enhancing production of anti-inflammatory cytokines (IL-10 and TGF-β). Gal-1 also shifted microglia/macrophage polarization toward the beneficial M2 phenotype in vivo by reducing CD16 expression and increasing CD206 expression. In sum, s-NSC transplantation confers robust neuroprotection against cerebral ischemia, probably by alleviating white matter injury and modulating microglial/macrophage function.
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48
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Tang YH, Ma YY, Zhang ZJ, Wang YT, Yang GY. Opportunities and challenges: stem cell-based therapy for the treatment of ischemic stroke. CNS Neurosci Ther 2015; 21:337-47. [PMID: 25676164 DOI: 10.1111/cns.12386] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Revised: 01/09/2015] [Accepted: 01/09/2015] [Indexed: 01/01/2023] Open
Abstract
Stem cell-based therapy for ischemic stroke has been widely explored in animal models and provides strong evidence of benefits. In this review, we summarize the types of stem cells, various delivery routes, and tracking tools for stem cell therapy of ischemic stroke. MSCs, EPCs, and NSCs are the most explored cell types for ischemic stroke treatment. Although the mechanisms of stem cell-based therapies are not fully understood, the most possible functions of the transplanted cells are releasing growth factors and regulating microenvironment through paracrine mechanism. Clinical application of stem cell-based therapy is still in its infancy. The next decade of stem cell research in stroke field needs to focus on combining different stem cells and different imaging modalities to fully explore the potential of this therapeutic avenue: from bench to bedside and vice versa.
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Affiliation(s)
- Yao-Hui Tang
- Neuroscience and Neuroengineering Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
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49
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Bai YY, Wang L, Peng XG, Wang YC, Chang D, Zheng S, Ding J, Li C, Ju S. Non-invasive monitoring of transplanted endothelial progenitor cells in diabetic ischemic stroke models. Biomaterials 2014; 40:43-50. [PMID: 25433605 DOI: 10.1016/j.biomaterials.2014.11.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2014] [Revised: 10/28/2014] [Accepted: 11/07/2014] [Indexed: 02/02/2023]
Abstract
Endogenous endothelial progenitor cells (EPCs) are functionally impaired in hyperglycemia through the p38 MAPK signaling pathway. However, the number and function of transplanted exogenous EPCs in diabetic animals remains unclear. The objectives of this study were to establish a non-invasive imaging strategy to monitor the homing of transplanted EPCs in diabetic stroke mice and to assess the effect of RWJ 67657, an inhibitor of p38 MAPK, on the homing ability of exogenous EPCs. Bone marrow-derived EPCs were labeled in vitro with a multi-functional nanoprobe modified with paramagnetic chelators and fluorophores before being infused into stroke mice. The signal of the nanoprobe reached its peak on day 5 in both magnetic resonance imaging and near-infrared fluorescence imaging after EPC transplantation in wild-type stroke models. The signal enhancement of diabetic stroke models was significantly lower than that of wild-type controls. However, the signal intensity of diabetic stroke models significantly increased after oral administration of RWJ 67657, indicating that more transplanted EPCs migrated to the ischemic brain. Furthermore, the increased exogenous EPCs induced remarkably greater angiogenesis after stroke. These results suggest that this dual-modal imaging strategy is feasible for non-invasively monitoring transplanted cells in vivo.
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Affiliation(s)
- Ying-Ying Bai
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing 210009, China
| | - Lishan Wang
- Department of General Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing 210009, China
| | - Xin-Gui Peng
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing 210009, China
| | - Yuan-Cheng Wang
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing 210009, China
| | - Di Chang
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing 210009, China
| | - Shuyan Zheng
- Key Laboratory of Smart Drug Delivery, Ministry of Education & PLA, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Jie Ding
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing 210009, China
| | - Cong Li
- Key Laboratory of Smart Drug Delivery, Ministry of Education & PLA, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Shenghong Ju
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing 210009, China.
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