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Nieto-Estevez V, Varma P, Mirsadeghi S, Caballero J, Gamero-Alameda S, Hosseini A, Goswami S, Silvosa MJ, Thodeson DM, Lybrand ZR, Giugliano M, Navara C, Hsieh J. Dual effects of ARX poly-alanine mutations in human cortical and interneuron development. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.25.577271. [PMID: 38328230 PMCID: PMC10849640 DOI: 10.1101/2024.01.25.577271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Mutations in ARX , an X-linked gene, are implicated in a wide spectrum of neurological disorders including patients who have intellectual disability and epilepsy. Mouse models have shown that Arx is critical for cortical development and interneuron migration, however they do not recapitulate the full phenotype observed in patients. Moreover, the epilepsy in many patients with poly-alanine tract expansion (PAE) mutations in ARX show pharmacoresistance, emphasizing the need to develop new treatments. Here, we used human neural organoid models to study the consequences of PAE mutations, one of the most prevalent mutations in ARX . We found that PAE mutations result in an early increase in radial glia cells and intermediate progenitor cells, and premature differentiation leading to a loss of cortical neurons at later timepoints. Moreover, ARX expression is upregulated in CO derived from patient at 30 DIV which alters the expression of CDKN1C , SFRP1 , DLK1 and FABP7 , among others. We also found a cell autonomously enhanced interneuron migration, which can be rescued by CXCR4 inhibition. Furthermore, ARX PAE assembloids had hyper-activity and synchrony evident from the early stages. These data provide novel insights to the pathogenesis of these and likely related human neurological disorders and identifies a critical window for therapeutic interventions.
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Chen Y, Wu M. Aitongping patch could alleviate cancer pain via suppressing microglia activation and modulating the miR-150-5p/CXCL12 signaling. Postgrad Med J 2024; 100:96-105. [PMID: 37978049 DOI: 10.1093/postmj/qgad102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 09/06/2023] [Accepted: 09/21/2023] [Indexed: 11/19/2023]
Abstract
PURPOSE We aimed to investigate the pharmacological effects and mechanisms of the Aitongping formula for treating cancer pain. METHODS We enrolled 60 cancer patients with Numeric Rating Scale above 4 and grouped them randomly as a Control group (N = 30) and a Patch group (N = 30). We also established bone cancer mice models via tumor implantation. And the animal groups were established as a Sham group, a tumor cell implantation (TCI) group, a TCI + Patch group, and a Patch group. RESULTS After the validation of successful tumor implantation, we identified candidate miRNAs and genes that were dysregulated in TCI mice and compared their expressions between different mice groups. We also observed the effect of Aitongping patch in vitro in mice primary microglia. The time to disease progression and cancer stability were prolonged by Aitongping patch in cancer patients. And the daily morphine dose was lower, and patients' quality of life was improved in the Patch group. Moreover, Aitongping patch alleviated cancer pain and inhibited microglia activation after the successful implantation of bone tumor in TCI mice. We also observed the dysregulation of miR-150-5p and chemokine CXC motif ligand 12 (CXCL12) mRNA in TCI mice. And CXCL12 was found to be targeted by miR-150-5p. Aitongping patch was found to upregulate miR-150-5p and downregulate CXCL12 in vivo and in vitro. CONCLUSION Aitongping patch could alleviate cancer pain via suppressing microglia activation, and the downregulation of miR-150-5p, as well as the upregulation of CXCL12 mRNA and protein, induced by tumor implantation or lipopolysaccharide stimulation, was restored by Aitongping treatment.
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Affiliation(s)
- Yunlong Chen
- Department of Oncology, Rudong County Hospital of Traditional Chinese Medicine, Rudong, Jiangsu 226400, China
| | - Mianhua Wu
- The First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210046, China
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Yasmin N, Collier AD, Abdulai AR, Karatayev O, Yu B, Fam M, Leibowitz SF. Role of Chemokine Cxcl12a in Mediating the Stimulatory Effects of Ethanol on Embryonic Development of Subpopulations of Hypocretin/Orexin Neurons and Their Projections. Cells 2023; 12:1399. [PMID: 37408233 PMCID: PMC10216682 DOI: 10.3390/cells12101399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/11/2023] [Accepted: 05/11/2023] [Indexed: 07/07/2023] Open
Abstract
Studies in zebrafish and rats show that embryonic ethanol exposure at low-moderate concentrations stimulates hypothalamic neurons expressing hypocretin/orexin (Hcrt) that promote alcohol consumption, effects possibly involving the chemokine Cxcl12 and its receptor Cxcr4. Our recent studies in zebrafish of Hcrt neurons in the anterior hypothalamus (AH) demonstrate that ethanol exposure has anatomically specific effects on Hcrt subpopulations, increasing their number in the anterior AH (aAH) but not posterior AH (pAH), and causes the most anterior aAH neurons to become ectopically expressed further anterior in the preoptic area (POA). Using tools of genetic overexpression and knockdown, our goal here was to determine whether Cxcl12a has an important function in mediating the specific effects of ethanol on these Hcrt subpopulations and their projections. The results demonstrate that the overexpression of Cxcl12a has stimulatory effects similar to ethanol on the number of aAH and ectopic POA Hcrt neurons and the long anterior projections from ectopic POA neurons and posterior projections from pAH neurons. They also demonstrate that knockdown of Cxcl12a blocks these effects of ethanol on the Hcrt subpopulations and projections, providing evidence supporting a direct role of this specific chemokine in mediating ethanol's stimulatory effects on embryonic development of the Hcrt system.
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Affiliation(s)
| | | | | | | | | | | | - Sarah F. Leibowitz
- Laboratory of Behavioral Neurobiology, The Rockefeller University, New York, NY 10065, USA
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4
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Olivero G, Grilli M, Marchi M, Pittaluga A. Metamodulation of presynaptic NMDA receptors: New perspectives for pharmacological interventions. Neuropharmacology 2023; 234:109570. [PMID: 37146939 DOI: 10.1016/j.neuropharm.2023.109570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 04/26/2023] [Accepted: 05/02/2023] [Indexed: 05/07/2023]
Abstract
Metamodulation shifted the scenario of the central neuromodulation from a simplified unimodal model to a multimodal one. It involves different receptors/membrane proteins physically associated or merely colocalized that act in concert to control the neuronal functions influencing each other. Defects or maladaptation of metamodulation would subserve neuropsychiatric disorders or even synaptic adaptations relevant to drug dependence. Therefore, this "vulnerability" represents a main issue to be deeply analyzed to predict its aetiopathogenesis, but also to propose targeted pharmaceutical interventions. The review focusses on presynaptic release-regulating NMDA receptors and on some of the mechanisms of their metamodulation described in the literature. Attention is paid to the interactors, including both ionotropic and metabotropic receptors, transporters and intracellular proteins, which metamodulate their responsiveness in physiological conditions but also undergo adaptation that are relevant to neurological dysfunctions. All these structures are attracting more and more the interest as promising druggable targets for the treatment of NMDAR-related central diseases: these substances would not exert on-off control of the colocalized NMDA receptors (as usually observed with NMDAR full agonists/antagonists), but rather modulate their functions, with the promise of limiting side effects that would favor their translation from preclinic to clinic.
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Affiliation(s)
- Guendalina Olivero
- Department of Pharmacy, University of Genoa, Viale Cembrano 4, 16148, Genoa, Italy
| | - Massimo Grilli
- Department of Pharmacy, University of Genoa, Viale Cembrano 4, 16148, Genoa, Italy; Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), 16148, Genoa, Italy.
| | - Mario Marchi
- Department of Pharmacy, University of Genoa, Viale Cembrano 4, 16148, Genoa, Italy
| | - Anna Pittaluga
- Department of Pharmacy, University of Genoa, Viale Cembrano 4, 16148, Genoa, Italy; Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), 16148, Genoa, Italy
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Gonzalez-Meljem JM, Ivins S, Andoniadou CL, Le Tissier P, Scambler P, Martinez-Barbera JP. An expression and function analysis of the CXCR4/SDF-1 signalling axis during pituitary gland development. PLoS One 2023; 18:e0280001. [PMID: 36800350 PMCID: PMC9937476 DOI: 10.1371/journal.pone.0280001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 12/19/2022] [Indexed: 02/18/2023] Open
Abstract
The chemokine SDF-1 (CXCL12) and its receptor CXCR4 control several processes during embryonic development such as the regulation of stem cell proliferation, differentiation, and migration. However, the role of this pathway in the formation of the pituitary gland is not understood. We sought to characterise the expression patterns of CXCR4, SDF-1 and CXCR7 at different stages of pituitary gland development. Our expression profiling revealed that SDF-1 is expressed in progenitor-rich regions of the pituitary anterior lobe, that CXCR4 and CXCR7 have opposite expression domains and that CXCR4 expression is conserved between mice and human embryos. We then assessed the importance of this signalling pathway in the development and function of the murine pituitary gland through conditional deletion of CXCR4 in embryonic pituitary progenitors. Successful and specific ablation of CXCR4 expression in embryonic pituitary progenitors did not lead to observable embryonic nor postnatal defects but allowed the identification of stromal CXCR4+ cells not derived from HESX1+ progenitors. Further analysis of constitutive SDF-1, CXCR7 and CXCR4 mutants of the pathway indicates that CXCR4 expression in HESX1+ cells and their descendants is not essential for normal pituitary development in mice.
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Affiliation(s)
- Jose Mario Gonzalez-Meljem
- Tecnologico de Monterrey, School of Engineering and Sciences, Mexico City, Mexico
- Developmental Biology and Cancer Programme, Birth Defects Research Centre, UCL-Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
| | - Sarah Ivins
- Developmental Biology and Cancer Programme, Birth Defects Research Centre, UCL-Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
| | - Cynthia Lilian Andoniadou
- Division of Craniofacial Development and Stem Cell Biology, King’s College London, Guy’s Hospital, London, United Kingdom
| | - Paul Le Tissier
- Centre for Integrative Physiology, University of Edinburgh, Edinburgh, United Kingdom
| | - Peter Scambler
- Developmental Biology and Cancer Programme, Birth Defects Research Centre, UCL-Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
| | - Juan Pedro Martinez-Barbera
- Developmental Biology and Cancer Programme, Birth Defects Research Centre, UCL-Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
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Wang J, Bian L, Du Y, Wang D, Jiang R, Lu J, Zhao X. The roles of chemokines following intracerebral hemorrhage in animal models and humans. Front Mol Neurosci 2023; 15:1091498. [PMID: 36704330 PMCID: PMC9871786 DOI: 10.3389/fnmol.2022.1091498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 12/12/2022] [Indexed: 01/12/2023] Open
Abstract
Intracerebral hemorrhage (ICH) is one common yet devastating stroke subtype, imposing considerable burdens on families and society. Current guidelines are limited to symptomatic treatments after ICH, and the death rate remains significant in the acute stage. Thus, it is crucial to promote research to develop new targets on brain injury after ICH. In response to hematoma formation, amounts of chemokines are released in the brain, triggering the infiltration of resident immune cells in the brain and the chemotaxis of peripheral immune cells via the broken blood-brain barrier. During the past decades, mounting studies have focused on the roles of chemokines and their receptors in ICH injury. This review summarizes the latest advances in the study of chemokine functions in the ICH. First, we provide an overview of ICH epidemiology and underlying injury mechanisms in the pathogenesis of ICH. Second, we introduce the biology of chemokines and their receptors in brief. Third, we outline the roles of chemokines in ICH according to subgroups, including CCL2, CCL3, CCL5, CCL12, CCL17, CXCL8, CXCL12, and CX3CL1. Finally, we summarize current drug usage targeting chemokines in ICH and other cardio-cerebrovascular diseases. This review discusses the expressions of these chemokines and receptors under normal or hemorrhagic conditions and cell-specific sources. Above all, we highlight the related data of these chemokines in the progression and outcomes of the ICH disease in preclinical and clinical studies and point to therapeutic opportunities targeting chemokines productions and interactions in treating ICH, such as accelerating hematoma absorption and alleviating brain edema.
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Affiliation(s)
- Jinjin Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China,China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Liheng Bian
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China,China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Yang Du
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China,China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Dandan Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China,China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Ruixuan Jiang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China,China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Jingjing Lu
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China,China National Clinical Research Center for Neurological Diseases, Beijing, China,*Correspondence: Jingjing Lu, ✉
| | - Xingquan Zhao
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China,China National Clinical Research Center for Neurological Diseases, Beijing, China,Research Unit of Artificial Intelligence in Cerebrovascular Disease, Chinese Academy of Medical Sciences, Beijing, China,Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China,Xingquan Zhao, ✉
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7
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Poole J, Kitchen GB. Circadian regulation of innate immunity in animals and humans and implications for human disease. Semin Immunopathol 2022; 44:183-192. [PMID: 35169890 PMCID: PMC8853148 DOI: 10.1007/s00281-022-00921-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 02/03/2022] [Indexed: 01/19/2023]
Abstract
Circadian rhythms are 24-h oscillating variations in physiology generated by the core circadian clock. There is now a wide body of evidence showing circadian regulation of the immune system. Innate immune cells contain the molecular circadian clock which drives rhythmic responses, from the magnitude of the inflammatory response to the numbers of circulating immune cells varying throughout the day. This leads to rhythmic presentation of disease clinically, for example the classic presentation of nocturnal asthma or the sudden development of pulmonary oedema from acute myocardial infarction first thing in the morning.
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Affiliation(s)
- Joanna Poole
- Southmead Hospital, North Bristol Trust, Southmead Rd, Bristol, BS10 5NB, UK
| | - Gareth B Kitchen
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Sciences Centre, Manchester, M13 9PT, UK.
- Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, M13 9WL, UK.
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8
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Piergiorge RM, de Vasconcelos ATR, Gonçalves Pimentel MM, Santos-Rebouças CB. Strict network analysis of evolutionary conserved and brain-expressed genes reveals new putative candidates implicated in Intellectual Disability and in Global Development Delay. World J Biol Psychiatry 2021; 22:435-445. [PMID: 32914658 DOI: 10.1080/15622975.2020.1821916] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
OBJECTIVES Intellectual Disability (ID) and Global Development Delay (GDD) are frequent reasons for referral to genetic services and although they present overlapping phenotypes concerning cognitive, motor, language, or social skills, they are not exactly synonymous. Aiming to better understand independent or shared mechanisms related to these conditions and to identify new candidate genes, we performed a highly stringent protein-protein interaction network based on genes previously related to ID/GDD in the Human Phenotype Ontology portal. METHODS ID/GDD genes were searched for reliable interactions through STRING and clustering analysis was applied to detect biological complexes through the MCL algorithm. Six coding hub genes (TP53, CDC42, RAC1, GNB1, APP, and EP300) were recognised by the Cytoscape NetworkAnalyzer plugin, interacting with 1625 proteins not yet associated with ID or GDD. Genes encoding these proteins were explored by gene ontology, associated diseases, evolutionary conservation, and brain expression. RESULTS One hundred and seventy-two new putative genes playing a role in enriched processes/pathways previously related to ID and GDD were revealed, some of which were already postulated to be linked to ID/GDD in additional databases. CONCLUSIONS Our findings expanded the aetiological genetic landscape of ID/GDD and showed evidence that both conditions are closely related at the molecular and functional levels.
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Affiliation(s)
- Rafael Mina Piergiorge
- Department of Genetics, Institute of Biology Roberto Alcantara Gomes, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Márcia Mattos Gonçalves Pimentel
- Department of Genetics, Institute of Biology Roberto Alcantara Gomes, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Cíntia Barros Santos-Rebouças
- Department of Genetics, Institute of Biology Roberto Alcantara Gomes, State University of Rio de Janeiro, Rio de Janeiro, Brazil
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9
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Lindhout IA, Murray TE, Richards CM, Klegeris A. Potential neurotoxic activity of diverse molecules released by microglia. Neurochem Int 2021; 148:105117. [PMID: 34186114 DOI: 10.1016/j.neuint.2021.105117] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 05/18/2021] [Accepted: 06/24/2021] [Indexed: 01/02/2023]
Abstract
Microglia are the professional immune cells of the brain, which support numerous physiological processes. One of the defensive functions provided by microglia involves secretion of cytotoxins aimed at destroying invading pathogens. It is also recognized that the adverse activation of microglia in diseased brains may lead to secretion of cytotoxic molecules, which could be damaging to the surrounding cells, including neurons. Several of these toxins, such as reactive oxygen and nitrogen species, L-glutamate, and quinolinic acid, are widely recognized and well-studied. This review is focused on a structurally diverse group of less-established microglia neurotoxins, which were selected by applying the two criteria that these molecules 1) can be released by microglia, and 2) have the potential to be directly harmful to neurons. The following 11 molecules are discussed in detail: amyloid beta peptides (Aβ); cathepsin (Cat)B and CatD; C-X-C motif chemokine ligand (CXCL)10 and CXCL12 (5-67); high mobility group box (HMGB)1; lymphotoxin (LT)-α; matrix metalloproteinase (MMP)-2 and MMP-9; platelet-activating factor (PAF); and prolyl endopeptidase (PEP). Molecular mechanisms of their release by microglia and neurotoxicity, as well as available evidence implicating their involvement in human neuropathologies are summarized. Further studies on several of the above molecules are warranted to confirm either their microglial origin in the brain or direct neurotoxic effects. In addition, investigations into the differential secretion patterns of neurotoxins by microglia in response to diverse stimuli are required. This research could identify novel therapeutic targets for neurological disorders involving adverse microglial activation.
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Affiliation(s)
- Ivan A Lindhout
- Department of Biology, University of British Columbia Okanagan Campus, 3187 University Way, Kelowna, British Columbia, V1V 1V7, Canada
| | - Taryn E Murray
- Department of Biology, University of British Columbia Okanagan Campus, 3187 University Way, Kelowna, British Columbia, V1V 1V7, Canada
| | - Christy M Richards
- Department of Biology, University of British Columbia Okanagan Campus, 3187 University Way, Kelowna, British Columbia, V1V 1V7, Canada
| | - Andis Klegeris
- Department of Biology, University of British Columbia Okanagan Campus, 3187 University Way, Kelowna, British Columbia, V1V 1V7, Canada.
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Roosen K, Scheld M, Mandzhalova M, Clarner T, Beyer C, Zendedel A. CXCL12 inhibits inflammasome activation in LPS-stimulated BV2 cells. Brain Res 2021; 1763:147446. [PMID: 33766517 DOI: 10.1016/j.brainres.2021.147446] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 03/15/2021] [Accepted: 03/18/2021] [Indexed: 10/21/2022]
Abstract
The activation of the CXCL12-CXCR4 signaling axis is implicated in the regulation of cell survival, proliferation, and mobilization of bone marrow stem cells into the injured site. We have shown in a previous study that intrathecal administration of CXCL12 reduces spinal cord tissue damage and neuroinflammation and provides functional improvement by reducing inflammasome activity and local inflammatory processes in an experimental spinal cord injury (SCI) rat model. Here, we aimed at investigating whether these neuroprotective effects rely on the control of CXCL12 signaling on microglial activation as microglia cells are known to be the primary immune cells of the brain. LPS induced the expression of the inflammasome components NLRP3, NLRC4 and ASC, the secretion of the cytokines IL-1b and IL-18 and the activation of caspase-1 protease in BV2 cells. Pre-treatment with CXCL12 significantly reduced LPS-induced IL-1b/IL-18 secretion and inflammasome induction. Our results also showed that CXCL12 can suppress caspase-1 activity, which leads to a decrease of SCI-related induction of active IL-1b.
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Affiliation(s)
- Kenza Roosen
- Institute of Neuroanatomy, RWTH Aachen University, 52074 Aachen, Germany
| | - Miriam Scheld
- Anatomy and Cell Biology, University of Augsburg, 86159 Augsburg, Germany
| | | | - Tim Clarner
- Institute of Neuroanatomy, RWTH Aachen University, 52074 Aachen, Germany
| | - Cordian Beyer
- Institute of Neuroanatomy, RWTH Aachen University, 52074 Aachen, Germany
| | - Adib Zendedel
- Institute of Neuroanatomy, RWTH Aachen University, 52074 Aachen, Germany.
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CXCL12 promotes spinal nerve regeneration and functional recovery after spinal cord injury. Neuroreport 2021; 32:450-457. [PMID: 33657074 DOI: 10.1097/wnr.0000000000001613] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Spinal cord injury (SCI) leads to permanent loss of motor and sensory function due to the complex mechanisms of the external microenvironment and internal neurobiochemistry that restrict neuronal plasticity and axonal regeneration. Chemokine CXCL12 was verified in regulating the development of central nervous system (CNS) and repairing of CNS disease. In the present study, CXCL12 was downregulated in the spinal cord after SCI. SCI also induced gliosis and loss of synapse. Intrathecal treatment of CXCL12 promoted the functional recovery of SCI by inducing the formation of neuronal connections and suppressing glia scar. To confirm whether CXCL12 promoted synapse formation and functional neuronal connections, the primary cortical neurons were treated with CXCL12 peptide, the synapse was examined using Immunofluorescence staining and the function of synapse was tested using a whole-cell patch clamp. The results indicated that CXCL12 peptide promoted axonal elongation, branche formation, dendrite generation and synaptogenesis. The electrophysiological results showed that CXCL12 peptide increased functional connections among neurons. Taken together, the present study illustrated an underlying mechanism of the development of SCI and indicated a potential approach to facilitate functional recovery of spinal cord after SCI.
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Huang S, Ziegler CGK, Austin J, Mannoun N, Vukovic M, Ordovas-Montanes J, Shalek AK, von Andrian UH. Lymph nodes are innervated by a unique population of sensory neurons with immunomodulatory potential. Cell 2020; 184:441-459.e25. [PMID: 33333021 DOI: 10.1016/j.cell.2020.11.028] [Citation(s) in RCA: 98] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 09/23/2020] [Accepted: 11/17/2020] [Indexed: 12/14/2022]
Abstract
Barrier tissue immune responses are regulated in part by nociceptors. Nociceptor ablation alters local immune responses at peripheral sites and within draining lymph nodes (LNs). The mechanisms and significance of nociceptor-dependent modulation of LN function are unknown. Using high-resolution imaging, viral tracing, single-cell transcriptomics, and optogenetics, we identified and functionally tested a sensory neuro-immune circuit that is responsive to lymph-borne inflammatory signals. Transcriptomics profiling revealed that multiple sensory neuron subsets, predominantly peptidergic nociceptors, innervate LNs, distinct from those innervating surrounding skin. To uncover LN-resident cells that may interact with LN-innervating sensory neurons, we generated a LN single-cell transcriptomics atlas and nominated nociceptor target populations and interaction modalities. Optogenetic stimulation of LN-innervating sensory fibers triggered rapid transcriptional changes in the predicted interacting cell types, particularly endothelium, stromal cells, and innate leukocytes. Thus, a unique population of sensory neurons monitors peripheral LNs and may locally regulate gene expression.
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Affiliation(s)
- Siyi Huang
- The Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139, USA; Department of Immunology & HMS Center for Immune Imaging, Harvard Medical School, Boston, MA 02115, USA.
| | - Carly G K Ziegler
- The Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139, USA; Institute for Medical Engineering & Science (IMES), Department of Chemistry, and Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA; Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Harvard-MIT Program in Health Sciences and Technology, Harvard Medical School, Cambridge, MA 02139, USA; Harvard Graduate Program in Biophysics, Harvard University, Boston, MA 02115, USA
| | - John Austin
- The Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139, USA; Department of Immunology & HMS Center for Immune Imaging, Harvard Medical School, Boston, MA 02115, USA
| | - Najat Mannoun
- The Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139, USA; Department of Immunology & HMS Center for Immune Imaging, Harvard Medical School, Boston, MA 02115, USA
| | - Marko Vukovic
- The Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139, USA; Institute for Medical Engineering & Science (IMES), Department of Chemistry, and Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA; Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Jose Ordovas-Montanes
- The Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139, USA; Institute for Medical Engineering & Science (IMES), Department of Chemistry, and Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA; Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Division of Gastroenterology, Boston Children's Hospital, Boston, MA 02115, USA
| | - Alex K Shalek
- The Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139, USA; Department of Immunology & HMS Center for Immune Imaging, Harvard Medical School, Boston, MA 02115, USA; Institute for Medical Engineering & Science (IMES), Department of Chemistry, and Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA; Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Harvard-MIT Program in Health Sciences and Technology, Harvard Medical School, Cambridge, MA 02139, USA.
| | - Ulrich H von Andrian
- The Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139, USA; Department of Immunology & HMS Center for Immune Imaging, Harvard Medical School, Boston, MA 02115, USA.
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Pisani A, Donno R, Gennari A, Cibecchini G, Catalano F, Marotta R, Pompa PP, Tirelli N, Bardi G. CXCL12-PLGA/Pluronic Nanoparticle Internalization Abrogates CXCR4-Mediated Cell Migration. NANOMATERIALS 2020; 10:nano10112304. [PMID: 33233846 PMCID: PMC7699919 DOI: 10.3390/nano10112304] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 11/18/2020] [Accepted: 11/19/2020] [Indexed: 02/06/2023]
Abstract
Chemokine-induced chemotaxis mediates physiological and pathological immune cell trafficking, as well as several processes involving cell migration. Among them, the role of CXCL12/CXCR4 signaling in cancer and metastasis is well known, and CXCR4 has been often targeted with small molecule-antagonists or short CXCL12-derived peptides to limit the pathological processes of cell migration and invasion. To reduce CXCR4-mediated chemotaxis, we adopted a different approach. We manufactured poly(lactic acid-co-glycolic acid) (PLGA)/Pluronic F127 nanoparticles through microfluidics-assisted nanoprecipitation and functionalized them with streptavidin to docking a biotinylated CXCL12 to be exposed on the nanoparticle surface. Our results show that CXCL12-decorated nanoparticles are non-toxic and do not induce inflammatory cytokine release in THP-1 monocytes cultured in fetal bovine and human serum-supplemented media. The cell internalization of our chemokine receptor-targeting particles increases in accordance with CXCR4 expression in FBS/medium. We demonstrated that CXCL12-decorated nanoparticles do not induce cell migration on their own, but their pre-incubation with THP-1 significantly decreases CXCR4+-cell migration, thereby antagonizing the chemotactic action of CXCL12. The use of biodegradable and immune-compatible chemokine-mimetic nanoparticles to reduce cell migration opens the way to novel antagonists with potential application in cancer treatments and inflammation.
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Affiliation(s)
- Anissa Pisani
- Nanobiointeractions & Nanodiagnostics, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; (A.P.); (G.C.); (P.P.P.)
- Department of Chemistry and Industrial Chemistry, University of Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Roberto Donno
- Laboratory of Polymers and Biomaterials, Istituto Italiano di Tecnologia, 16163 Genova, Italy; (R.D.); (A.G.)
| | - Arianna Gennari
- Laboratory of Polymers and Biomaterials, Istituto Italiano di Tecnologia, 16163 Genova, Italy; (R.D.); (A.G.)
| | - Giulia Cibecchini
- Nanobiointeractions & Nanodiagnostics, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; (A.P.); (G.C.); (P.P.P.)
- Department of Chemistry and Industrial Chemistry, University of Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Federico Catalano
- Electron Microscopy Laboratory, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; (F.C.); (R.M.)
| | - Roberto Marotta
- Electron Microscopy Laboratory, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; (F.C.); (R.M.)
| | - Pier Paolo Pompa
- Nanobiointeractions & Nanodiagnostics, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; (A.P.); (G.C.); (P.P.P.)
| | - Nicola Tirelli
- Laboratory of Polymers and Biomaterials, Istituto Italiano di Tecnologia, 16163 Genova, Italy; (R.D.); (A.G.)
- Division of Pharmacy and Optometry, School of Health Sciences, University of Manchester, Oxford Road, Manchester M13 9PT, UK
- Correspondence: (N.T.); (G.B.); Tel.: +39-010-289-6923 (N.T.); +39-010-289-6519 (G.B.)
| | - Giuseppe Bardi
- Nanobiointeractions & Nanodiagnostics, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; (A.P.); (G.C.); (P.P.P.)
- Correspondence: (N.T.); (G.B.); Tel.: +39-010-289-6923 (N.T.); +39-010-289-6519 (G.B.)
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14
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Masood MI, Schäfer KH, Naseem M, Weyland M, Meiser P. Troxerutin flavonoid has neuroprotective properties and increases neurite outgrowth and migration of neural stem cells from the subventricular zone. PLoS One 2020; 15:e0237025. [PMID: 32797057 PMCID: PMC7428079 DOI: 10.1371/journal.pone.0237025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 07/17/2020] [Indexed: 02/07/2023] Open
Abstract
Troxerutin (TRX) is a water-soluble flavonoid which occurs commonly in the edible plants. Recent studies state that TRX improves the functionality of the nervous system and neutralizes Amyloid-ß induced neuronal toxicity. In this study, an in vitro assay based upon Neural stem cell (NSCs) isolated from the subventricular zone of the postnatal balb/c mice was established to explore the impact of TRX on individual neurogenesis processes in general and neuroprotective effect against ß-amyloid 1-42 (Aß42) induced inhibition in differentiation in particular. NSCs were identified exploiting immunostaining of the NSCs markers. Neurosphere clonogenic assay and BrdU/Ki67 immunostaining were employed to unravel the impact of TRX on proliferation. Differentiation experiments were carried out for a time span lasting from 48 h to 7 days utilizing ß-tubulin III and GFAP as neuronal and astrocyte marker respectively. Protective effects of TRX on Aß42 induced depression of NSCs differentiation were determined after 48 h of application. A neurosphere migration assay was carried out for 24 h in the presence and absence of TRX. Interestingly, TRX enhanced neuronal differentiation of NSCs in a dose-dependent manner after 48 h and 7 days of incubation and significantly enhanced neurite growth. A higher concentration of TRX also neutralized the inhibitory effects of Aß42 on neurite outgrowth and length after 48 h of incubation. TRX significantly stimulated cell migration. Overall, TRX not only promoted NSCs differentiation and migration but also neutralized the inhibitory effects of Aß42 on NSCs. TRX, therefore, offers an interesting lead structure from the perspective of drug design especially to promote neurogenesis in neurological disorders i.e. Alzheimer's disease.
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Affiliation(s)
- Muhammad Irfan Masood
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, Saarbrücken, Germany
- ENS Group, University of Applied Sciences Kaiserslautern, Zweibrücken, Germany
- Institute of Pharmaceutical Sciences, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | | | - Mahrukh Naseem
- Department of Zoology, University of Balochistan, Quetta, Pakistan
| | - Maximilian Weyland
- ENS Group, University of Applied Sciences Kaiserslautern, Zweibrücken, Germany
| | - Peter Meiser
- Medical Scientific Department GM, URSAPHARM Arzneimittel GmbH, Saarbrücken, Germany
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15
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Wang S, Chen C, Li J, Xu X, Chen W, Li F. The CXCL12/CXCR4 axis confers temozolomide resistance to human glioblastoma cells via up-regulation of FOXM1. J Neurol Sci 2020; 414:116837. [PMID: 32334273 DOI: 10.1016/j.jns.2020.116837] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 04/10/2020] [Accepted: 04/13/2020] [Indexed: 11/18/2022]
Abstract
Glioblastoma multiforme (GBM) is the most common primary malignancy in the adult central nervous, and is characterized by high aggressiveness and a high mortality rate. The high mortality rate is largely due to the development of drug resistance. Temozolomide (TMZ) resistance is considered to be one of the major reasons responsible for GBM therapy failure. CXCL12/CXCR4 has been demonstrated to be involved in cell proliferation, migration, invasion, angiogenesis, and radioresistance in GBM. However, its role in TMZ resistance in GBM is unknown. In this study, we aimed to evaluate the role of CXCL12/CXCR4 in mediating the TMZ resistance to GBM cells and explore the underlying mechanisms. We found that the CXCL12/CXCR4 axis enhanced TMZ resistance in GBM cells. Further study showed that CXCL12/CXCR4 conferred TMZ resistance and promoted the migration and invasion of GBM cells by up-regulating FOXM1. This resistance was partially reversed by suppressing CXCL12/CXCR4 and FOXM1 silencing. Our study revealed the vital role of CXCL12/CXCR4 in mediating the resistance of GBM cells to TMZ, and suggested that targeting CXCL12/CXCR4 axis may attenuate the resistance to TMZ in GBM.
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Affiliation(s)
- Shengwen Wang
- Department of Neurosurgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Cheng Chen
- Department of Neurosurgery, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Junliang Li
- Department of Neurosurgery, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Xinke Xu
- Department of Neurosurgery, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Wei Chen
- Department of Neurosurgery, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Fangcheng Li
- Department of Neurosurgery, Guangzhou Women and Children's Medical Center, Guangzhou, China.
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16
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Zanetti G, Negro S, Megighian A, Mattarei A, Lista F, Fillo S, Rigoni M, Pirazzini M, Montecucco C. A CXCR4 receptor agonist strongly stimulates axonal regeneration after damage. Ann Clin Transl Neurol 2019; 6:2395-2402. [PMID: 31725979 PMCID: PMC6917312 DOI: 10.1002/acn3.50926] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/30/2019] [Accepted: 10/02/2019] [Indexed: 12/21/2022] Open
Abstract
Objective To test whether the signaling axis CXCL12α‐CXCR4 is activated upon crush/cut of the sciatic nerve and to test the activity of NUCC‐390, a new CXCR4 agonist, in promoting nerve recovery from damage. Methods The sciatic nerve was either crushed or cut. Expression and localization of CXCL12α and CXCR4 were evaluated by imaging with specific antibodies. Their functional involvement in nerve regeneration was determined by antibody‐neutralization of CXCL12α, and by the CXCR4 specific antagonist AMD3100, using as quantitative read‐out the compound muscle action potential (CMAP). NUCC‐390 activity on nerve regeneration was determined by imaging and CMAP recordings. Results CXCR4 is expressed at the injury site within the axonal compartment, whilst its ligand CXCL12α is expressed in Schwann cells. The CXCL12α‐CXCR4 axis is involved in the recovery of neurotransmission of the injured nerve. More importantly, the small molecule NUCC‐390 is a strong promoter of the functional and anatomical recovery of the nerve, by acting very similarly to CXCL12α. This pharmacological action is due to the capability of NUCC‐390 to foster elongation of motor neuron axons both in vitro and in vivo. Interpretation Imaging and electrophysiological data provide novel and compelling evidence that the CXCL12α‐CXCR4 axis is involved in sciatic nerve repair after crush/cut. This makes NUCC‐390 a strong candidate molecule to stimulate nerve repair by promoting axonal elongation. We propose this molecule to be tested in other models of neuronal damage, to lay the basis for clinical trials on the efficacy of NUCC‐390 in peripheral nerve repair in humans.
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Affiliation(s)
- Giulia Zanetti
- Department of Biomedical Sciences, University of Padua, Padua, Italy
| | - Samuele Negro
- Department of Biomedical Sciences, University of Padua, Padua, Italy
| | - Aram Megighian
- Department of Biomedical Sciences, University of Padua, Padua, Italy.,Padua Neuroscience Center, University of Padua, Padua, Italy
| | - Andrea Mattarei
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy
| | | | - Silvia Fillo
- Scientific Department, Army Medical Center, Roma, Italy
| | - Michela Rigoni
- Department of Biomedical Sciences, University of Padua, Padua, Italy
| | - Marco Pirazzini
- Department of Biomedical Sciences, University of Padua, Padua, Italy
| | - Cesare Montecucco
- Department of Biomedical Sciences, University of Padua, Padua, Italy.,CNR Institute of Neuroscience, Padua, Italy
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17
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Lee HH, Jeong JW, Hong SH, Park C, Kim BW, Choi YH. Diallyl Trisulfide Suppresses the Production of Lipopolysaccharide-induced Inflammatory Mediators in BV2 Microglia by Decreasing the NF-κB Pathway Activity Associated With Toll-like Receptor 4 and CXCL12/CXCR4 Pathway Blockade. J Cancer Prev 2018; 23:134-140. [PMID: 30370258 PMCID: PMC6197846 DOI: 10.15430/jcp.2018.23.3.134] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 09/14/2018] [Accepted: 09/16/2018] [Indexed: 01/05/2023] Open
Abstract
Background Diallyl trisulfide (DATS), a garlic-derived organosulfuric compound, has been documented for potential anti-inflammatory effects. However, the mechanism in microglia remains unknown. In this study, we investigated the anti-inflammatory effects of DATS in lipopolysaccharide (LPS)-stimulated BV2 microglial cells. Methods The effects of DATS on LPS-induced pro-inflammatory mediators such as nitric oxide (NO) and prostaglandin E2 (PGE2) were assessed under conditions not in the cytotoxicity of DATS. The protein expression of inflammation regulatory genes was measured by Western blot analysis. Results DATS significantly inhibited the LPS-induced secretion of NO and PGE2, which was associated with the suppression of their regulatory genes, inducible NO synthase and COX-2. DATS had been shown to inhibit nuclear translocation of NF-κB by destroying the degradation and phosphorylation of IκB-α inhibitors in the cytoplasm. In addition, DATS effectively inhibited the expression of LPS-induced toll-like receptor 4 (TLR4) and myeloid differentiation factor 88. Furthermore, DATS markedly reduced the LPS-induced expression of chemokine (CXC motif) ligand (CXCL) 12 and CXC receptor (CXCR) 4, demonstrating its capacity to block chemo-attractive activity. Conclusions These results indicate that DATS inhibits the activation of the CXCL12/CXCR4 axis associated with antagonizing effect on TLR4 and blocks NF-κB signaling, thus demonstrating anti-inflammatory effects against LPS stimulation.
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Affiliation(s)
- Hye Hyeon Lee
- Anti-Aging Research Center and Blue Bio Industry RIC, Dong-Eui University, Busan, Korea
| | - Jin-Woo Jeong
- Freshwater Bioresources Utilization Bureau, Nakdonggang National Institute of Biological Resources, Sangju, Korea
| | - Su Hyun Hong
- Anti-Aging Research Center and Blue Bio Industry RIC, Dong-Eui University, Busan, Korea.,Department of Biochemistry, Dong-Eui University College of Korean Medicine, Busan, Korea
| | - Cheol Park
- Department of Molecular Biology, College of Natural Sciences, Dong-Eui University, Busan, Korea
| | - Byung Woo Kim
- Anti-Aging Research Center and Blue Bio Industry RIC, Dong-Eui University, Busan, Korea.,Department of Life Science and Biotechnology, College of Engineering, Dong-Eui University, Busan, Korea
| | - Yung Hyun Choi
- Anti-Aging Research Center and Blue Bio Industry RIC, Dong-Eui University, Busan, Korea.,Department of Biochemistry, Dong-Eui University College of Korean Medicine, Busan, Korea
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18
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Divergent Expression Patterns and Function of Two cxcr4 Paralogs in Hermaphroditic Epinephelus coioides. Int J Mol Sci 2018; 19:ijms19102943. [PMID: 30262794 PMCID: PMC6213054 DOI: 10.3390/ijms19102943] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 09/11/2018] [Accepted: 09/18/2018] [Indexed: 11/16/2022] Open
Abstract
Chemokine receptor Cxcr4 evolved two paralogs in the teleost lineage. However, cxcr4a and cxcr4b have been characterized only in a few species. In this study, we identified two cxcr4 paralogs from the orange-spotted grouper, Epinephelus coioides. The phylogenetic relationship and gene structure and synteny suggest that the duplicated cxcr4a/b should result from the teleost-specific genome duplication (Ts3R). The teleost cxcr4 gene clusters in two paralogous chromosomes exhibit a complementary gene loss/retention pattern. Ec_cxcr4a and Ec_cxcr4b show differential and biased expression patterns in grouper adult tissue, gonads, and embryos at different stages. During embryogenesis, Ec_cxcr4a/b are abundantly transcribed from the neurula stage and mainly expressed in the neural plate and sensory organs, indicating their roles in neurogenesis. Ec_Cxcr4a and Ec_Cxcr4b possess different chemotactic migratory abilities from the human SDF-1α, Ec_Cxcl12a, and Ec_Cxcl12b. Moreover, we uncovered the N-terminus and TM5 domain as the key elements for specific ligand⁻receptor recognition of Ec_Cxcr4a-Ec_Cxcl12b and Ec_Cxcr4b-Ec_Cxcl12a. Based on the biased and divergent expression patterns of Eccxcr4a/b, and specific ligand⁻receptor recognition of Ec_Cxcl12a/b⁻Ec_Cxcr4b/a, the current study provides a paradigm of sub-functionalization of two teleost paralogs after Ts3R.
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19
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Hattori Y, Miyata T. Microglia extensively survey the developing cortex via the CXCL12/CXCR4 system to help neural progenitors to acquire differentiated properties. Genes Cells 2018; 23:915-922. [PMID: 30144249 DOI: 10.1111/gtc.12632] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 07/16/2018] [Accepted: 07/20/2018] [Indexed: 02/04/2023]
Abstract
Neocortical development proceeds through the formation of new zones in which neural-lineage cells are organized based on their differentiation status. Although microglia initially distribute homogeneously throughout the growing cerebral wall, they accumulate in the inner cytogenic zone, the ventricular zone (VZ) and the subventricular zone (SVZ) in the mid-embryonic stage. However, the roles of these cells remain to be elucidated. In this study, we found that microglia, despite being only a minor population of the cells that constitute the cerebral wall, promote the differentiation of neural progenitor cells by frequently moving throughout the cortex; their migration is mediated by the CXCL12/CXCR4 system. Pulse-chase experiments confirmed that microglia help Pax6+ stem-like cells to differentiate into Tbr2+ intermediate progenitors. Further, monitoring of microglia by live imaging showed that administration of AMD3100, an antagonist of CXCR4, dampened microglial movement and decreased microglial surveillance throughout the cortex. In particular, arrest of microglial motion led to a prominent decrease in the abundance of Tbr2+ cells in the SVZ. Based on our findings, we propose that extensive surveillance by microglia contributes to the efficient functioning of these cells, thereby regulating the differentiation of neural stem-like cells.
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Affiliation(s)
- Yuki Hattori
- Department of Anatomy and Cell Biology, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Japan Society for the Promotion of Science, Tokyo, Japan
| | - Takaki Miyata
- Department of Anatomy and Cell Biology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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20
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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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21
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Li YY, Li H, Liu ZL, Li Q, Qiu HW, Zeng LJ, Yang W, Zhang XZ, Li ZY. Activation of STAT3-mediated CXCL12 up-regulation in the dorsal root ganglion contributes to oxaliplatin-induced chronic pain. Mol Pain 2017; 13:1744806917747425. [PMID: 29166835 PMCID: PMC5724644 DOI: 10.1177/1744806917747425] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Oxaliplatin-induced chronic painful neuropathy is the most common dose-limiting adverse event that negatively affects cancer patients’ quality of life. However, the underlying molecular mechanisms are still unclear. In the present study, we found that the intraperitoneal administration of oxaliplatin at 4 mg/kg for five consecutive days noticeably upregulated the expression of CXC motif ligand 12 (CXCL12) in the dorsal root ganglion, and the intrathecal injection of an anti-CXCL12 neutralizing antibody or CXCL12 siRNA attenuated the mechanical allodynia and thermal hyperalgesia induced by oxaliplatin. We also found that the signal transducers and transcription activator 3 (STAT3) was activated in the dorsal root ganglion, and inhibition of STAT3 with S3I-201 or the injection of AAV-Cre-GFP into STAT3flox/flox mice prevented the upregulation of CXCL12 expression in the dorsal root ganglion and chronic pain following oxaliplatin administration. Double-label fluorescent immunohistochemistry findings also showed that p-STAT3 was mainly localized in CXCL12-positive cells in the dorsal root ganglion. Furthermore, the results of a chromatin immunoprecipitation assay revealed that p-STAT3 might be essential for oxaliplatin-induced CXCL12 upregulation via binding directly to the specific position of the CXCL12 gene promoter. Finally, we found that cytokine TNF-α and IL-1β increases mediated the STAT3 activation following oxaliplatin treatment. Taken together, these findings suggested that the upregulation of CXCL12 via TNF-α/IL-1β–dependent STAT3 activation contributes to oxaliplatin-induced chronic pain.
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Affiliation(s)
- Yong-Yong Li
- 1 Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - He Li
- 2 Department of Pain Medicine, The Eighth Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Shenzhen, China
| | - Ze-Long Liu
- 1 Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Qiong Li
- 2 Department of Pain Medicine, The Eighth Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Shenzhen, China
| | - Hua-Wen Qiu
- 2 Department of Pain Medicine, The Eighth Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Shenzhen, China
| | - Li-Jin Zeng
- 3 Department of General Internal Medicine, The First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - Wen Yang
- 3 Department of General Internal Medicine, The First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - Xiang-Zhong Zhang
- 4 Department of Hematology, The Third Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - Zhen-Yu Li
- 3 Department of General Internal Medicine, The First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
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22
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Poon K, Barson JR, Shi H, Chang GQ, Leibowitz SF. Involvement of the CXCL12 System in the Stimulatory Effects of Prenatal Exposure to High-Fat Diet on Hypothalamic Orexigenic Peptides and Behavior in Offspring. Front Behav Neurosci 2017; 11:91. [PMID: 28567007 PMCID: PMC5434113 DOI: 10.3389/fnbeh.2017.00091] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 04/28/2017] [Indexed: 01/09/2023] Open
Abstract
Exposure to a high fat diet (HFD) during gestation stimulates neurogenesis and expression of hypothalamic orexigenic neuropeptides that affect consummatory and emotional behaviors. With recent studies showing a HFD to increase inflammation, this report investigated the neuroinflammatory chemokine, CXCL12, and compared the effects of prenatal CXCL12 injection to those of prenatal HFD exposure, first, by testing whether the HFD affects circulating CXCL12 in the dam and the CXCL12 system in the offspring brain, and then by examining whether prenatal exposure to CXCL12 itself mimics the effects of a HFD on hypothalamic neuropeptides and emotional behaviors. Our results showed that prenatal exposure to a HFD significantly increased circulating levels of CXCL12 in the dam, and that daily injections of CXCL12 induced a similar increase in CXCL12 levels as the HFD. In addition, prenatal HFD exposure significantly increased the expression of CXCL12 and its receptors, CXCR4 and CXCR7, in the hypothalamic paraventricular nucleus (PVN) of the offspring. Finally, the results revealed strong similarities in the effects of prenatal HFD and CXCL12 administration, which both stimulated neurogenesis and enkephalin (ENK) expression in the PVN, while having inconsistent or no effect in other regions of the hypothalamus, and also increased anxiety as measured by several behavioral tests. These results focus attention specifically on the CXCL12 chemokine system in the PVN of the offspring as being possibly involved in the stimulatory effects of prenatal HFD exposure on ENK-expressing neurons in the PVN and their associated changes in emotional behavior.
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Affiliation(s)
- Kinning Poon
- Laboratory of Behavioral Neurobiology, Rockefeller UniversityNew York, NY, USA
| | - Jessica R Barson
- Laboratory of Behavioral Neurobiology, Rockefeller UniversityNew York, NY, USA.,Department of Neurobiology and Anatomy, Drexel University College of MedicinePhiladelphia, PA, USA
| | - Huanzhi Shi
- Laboratory of Behavioral Neurobiology, Rockefeller UniversityNew York, NY, USA
| | - Guo Qing Chang
- Laboratory of Behavioral Neurobiology, Rockefeller UniversityNew York, NY, USA
| | - Sarah F Leibowitz
- Laboratory of Behavioral Neurobiology, Rockefeller UniversityNew York, NY, USA
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23
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Chang S, Li Y, Yuan F, Qu M, Song Y, Zhang Z, Yang GY, Wang Y. Monomeric CXCL12 outperforms its dimeric and wild type variants in the promotion of human endothelial progenitor cells' function. Biochem Biophys Res Commun 2017; 488:303-310. [PMID: 28487111 DOI: 10.1016/j.bbrc.2017.03.172] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 03/29/2017] [Indexed: 10/19/2022]
Abstract
CXCL12 overexpression improves neurobehavioral recovery during post-ischemic stroke through multiple mechanisms including promoting endothelial progenitor cells function in animal models. It has been proposed that the monomer and dimer forms possess differential chemotactic and regulatory function. The aim of present study is to explore whether a monomeric or dimeric CXCL12 plays a different role in the endothelial progenitor cells proliferation, migration, and tube-formation in vitro. In this study, we transferred monomeric, dimeric and wild type CXCL12 gene into endothelial progenitor cells via lentiviral vectors. We investigated endothelial progenitor cells function following the interaction of CXCL12/CXCR4 or CXCL12/CXCR7 and downstream signaling pathways. Our results showed that the monomeric CXCL12 transfected endothelial progenitor cells had enhanced ability in cell proliferation, migration, and tube-formation compared to that in dimeric or wild type controls (p < 0.05). Both CXCR4 and CXCR7 were significantly overexpressed in the monomeric CXCL12 transfected endothelial progenitor cells compared to that in the dimeric or wide type controls (p < 0.05). The function of migration, but not proliferation or tube-formation, was significantly reduced in the monomeric CXCL12 transfected endothelial progenitor cells when the cells were pre-treated with either CXCR4 inhibitor AMD3100 or siCXCR7 (p < 0.05), suggesting this cell function was partially regulated by CXCL12/CXCR4 and CXCL12/CXCR7 signal pathways. Our study demonstrated that monomeric CXCL12 was the fundamental form, which played important roles in endothelial progenitor cells' proliferation, migration, and tube-formation.
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Affiliation(s)
- Shuang Chang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Yaning Li
- Department of Neurosurgery, Stanford University School of Medicine, MSLS Building, P306, 1201 Welch Road, Room P306, Stanford, CA 94305, USA
| | - Fang Yuan
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Meijie Qu
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China; Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Yaying Song
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Zhijun Zhang
- Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering, 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, Shanghai 200030, China; Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200030, China.
| | - Yongting Wang
- 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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24
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Armijo-Weingart L, Gallo G. It takes a village to raise a branch: Cellular mechanisms of the initiation of axon collateral branches. Mol Cell Neurosci 2017; 84:36-47. [PMID: 28359843 DOI: 10.1016/j.mcn.2017.03.007] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 01/03/2017] [Accepted: 03/01/2017] [Indexed: 12/14/2022] Open
Abstract
The formation of axon collateral branches from the pre-existing shafts of axons is an important aspect of neurodevelopment and the response of the nervous system to injury. This article provides an overview of the role of the cytoskeleton and signaling mechanisms in the formation of axon collateral branches. Both the actin filament and microtubule components of the cytoskeleton are required for the formation of axon branches. Recent work has begun to shed light on how these two elements of the cytoskeleton are integrated by proteins that functionally or physically link the cytoskeleton. While a number of signaling pathways have been determined as having a role in the formation of axon branches, the complexity of the downstream mechanisms and links to specific signaling pathways remain to be fully determined. The regulation of intra-axonal protein synthesis and organelle function are also emerging as components of signal-induced axon branching. Although much has been learned in the last couple of decades about the mechanistic basis of axon branching we can look forward to continue elucidating this complex biological phenomenon with the aim of understanding how multiple signaling pathways, cytoskeletal regulators and organelles are coordinated locally along the axon to give rise to a branch.
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Affiliation(s)
- Lorena Armijo-Weingart
- Shriners Pediatric Research Center, Temple University, Department of Anatomy and Cell Biology, 3500 North Broad St, Philadelphia, PA 19140, United States
| | - Gianluca Gallo
- Shriners Pediatric Research Center, Temple University, Department of Anatomy and Cell Biology, 3500 North Broad St, Philadelphia, PA 19140, United States.
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25
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Chu T, Shields LBE, Zhang YP, Feng SQ, Shields CB, Cai J. CXCL12/CXCR4/CXCR7 Chemokine Axis in the Central Nervous System: Therapeutic Targets for Remyelination in Demyelinating Diseases. Neuroscientist 2017; 23:627-648. [PMID: 29283028 DOI: 10.1177/1073858416685690] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The chemokine CXCL12 plays a vital role in regulating the development of the central nervous system (CNS) by binding to its receptors CXCR4 and CXCR7. Recent studies reported that the CXCL12/CXCR4/CXCR7 axis regulates both embryonic and adult oligodendrocyte precursor cells (OPCs) in their proliferation, migration, and differentiation. The changes in the expression and distribution of CXCL12 and its receptors are tightly associated with the pathological process of demyelination in multiple sclerosis (MS), suggesting that modulating the CXCL12/CXCR4/CXCR7 axis may benefit myelin repair by enhancing OPC recruitment and differentiation. This review aims to integrate the current findings of the CXCL12/CXCR4/CXCR7 signaling pathway in the CNS and to highlight its role in oligodendrocyte development and demyelinating diseases. Furthermore, this review provides potential therapeutic strategies for myelin repair by analyzing the relevance between the pathological changes and the regulatory roles of CXCL12/CXCR4/CXCR7 during MS.
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Affiliation(s)
- Tianci Chu
- 1 Department of Pediatrics, University of Louisville School of Medicine, Louisville, KY, USA
| | - Lisa B E Shields
- 2 Norton Neuroscience Institute, Norton Healthcare, Louisville, KY, USA
| | - Yi Ping Zhang
- 2 Norton Neuroscience Institute, Norton Healthcare, Louisville, KY, USA
| | - Shi-Qing Feng
- 3 Department of Orthopedics, General Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | | | - Jun Cai
- 1 Department of Pediatrics, University of Louisville School of Medicine, Louisville, KY, USA.,4 Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY, USA
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26
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Mishra RK, Shum AK, Platanias LC, Miller RJ, Schiltz GE. Discovery and characterization of novel small-molecule CXCR4 receptor agonists and antagonists. Sci Rep 2016; 6:30155. [PMID: 27456816 PMCID: PMC4960487 DOI: 10.1038/srep30155] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 06/29/2016] [Indexed: 01/01/2023] Open
Abstract
The chemokine CXCL12 (SDF-1) and its cognate receptor CXCR4 are involved in a large number of physiological processes including HIV-1 infectivity, inflammation, tumorigenesis, stem cell migration, and autoimmune diseases. While previous efforts have identified a number of CXCR4 antagonists, there have been no small molecule agonists reported. Herein, we describe the identification of a novel series of CXCR4 modulators, including the first small molecules to display agonist behavior against this receptor, using a combination of structure- and ligand-based virtual screening. These agonists produce robust calcium mobilization in human melanoma cell lines which can be blocked by the CXCR4-selective antagonist AMD3100. We also demonstrate the ability of these new agonists to induce receptor internalization, ERK activation, and chemotaxis, all hallmarks of CXCR4 activation. Our results describe a new series of biologically relevant small molecules that will enable further study of the CXCR4 receptor and may contribute to the development of new therapeutics.
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Affiliation(s)
- Rama K Mishra
- The Center for Molecular Innovation and Drug Discovery, Northwestern University, Evanston IL, USA
| | - Andrew K Shum
- Department of Pharmacology, Northwestern University, Chicago IL, USA
| | - Leonidas C Platanias
- Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago IL, USA.,Department of Medicine, Jesse Brown Veterans Affairs Medical Center, Chicago IL, USA
| | - Richard J Miller
- Department of Pharmacology, Northwestern University, Chicago IL, USA
| | - Gary E Schiltz
- The Center for Molecular Innovation and Drug Discovery, Northwestern University, Evanston IL, USA.,Department of Pharmacology, Northwestern University, Chicago IL, USA.,Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago IL, USA
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27
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Gervois P, Wolfs E, Ratajczak J, Dillen Y, Vangansewinkel T, Hilkens P, Bronckaers A, Lambrichts I, Struys T. Stem Cell-Based Therapies for Ischemic Stroke: Preclinical Results and the Potential of Imaging-Assisted Evaluation of Donor Cell Fate and Mechanisms of Brain Regeneration. Med Res Rev 2016; 36:1080-1126. [DOI: 10.1002/med.21400] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 05/27/2016] [Accepted: 06/17/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Pascal Gervois
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Esther Wolfs
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Jessica Ratajczak
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Yörg Dillen
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Tim Vangansewinkel
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Petra Hilkens
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Annelies Bronckaers
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Ivo Lambrichts
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
| | - Tom Struys
- Morphology Research Group, Biomedical Research Institute, Hasselt University; Campus Diepenbeek; Bioville Diepenbeek Belgium
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28
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Kurakin A, Bredesen DE. Dynamic self-guiding analysis of Alzheimer's disease. Oncotarget 2016; 6:14092-122. [PMID: 26041885 PMCID: PMC4546454 DOI: 10.18632/oncotarget.4221] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 04/08/2015] [Indexed: 01/25/2023] Open
Abstract
We applied a self-guiding evolutionary algorithm to initiate the synthesis of the Alzheimer's disease-related data and literature. A protein interaction network associated with amyloid-beta precursor protein (APP) and a seed model that treats Alzheimer's disease as progressive dysregulation of APP-associated signaling were used as dynamic “guides” and structural “filters” in the recursive search, analysis, and assimilation of data to drive the evolution of the seed model in size, detail, and complexity. Analysis of data and literature across sub-disciplines and system-scale discovery platforms suggests a key role of dynamic cytoskeletal connectivity in the stability, plasticity, and performance of multicellular networks and architectures. Chronic impairment and/or dysregulation of cell adhesions/synapses, cytoskeletal networks, and/or reversible epithelial-to-mesenchymal-like transitions, which enable and mediate the stable and coherent yet dynamic and reconfigurable multicellular architectures, may lead to the emergence and persistence of the disordered, wound-like pockets/microenvironments of chronically disconnected cells. Such wound-like microenvironments support and are supported by pro-inflammatory, pro-secretion, de-differentiated cellular phenotypes with altered metabolism and signaling. The co-evolution of wound-like microenvironments and their inhabitants may lead to the selection and stabilization of degenerated cellular phenotypes, via acquisition of epigenetic modifications and mutations, which eventually result in degenerative disorders such as cancer and Alzheimer's disease.
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Affiliation(s)
- Alexei Kurakin
- Mary S. Easton Center for Alzheimer's Disease Research, Department of Neurology, University of California, Los Angeles, CA, USA
| | - Dale E Bredesen
- Mary S. Easton Center for Alzheimer's Disease Research, Department of Neurology, University of California, Los Angeles, CA, USA.,Buck Institute for Research on Aging, Novato, CA, USA
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29
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Di Prisco S, Olivero G, Merega E, Bonfiglio T, Marchi M, Pittaluga A. CXCR4 and NMDA Receptors Are Functionally Coupled in Rat Hippocampal Noradrenergic and Glutamatergic Nerve Endings. J Neuroimmune Pharmacol 2016; 11:645-656. [PMID: 27147258 DOI: 10.1007/s11481-016-9677-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 04/25/2016] [Indexed: 01/31/2023]
Abstract
Previous studies had shown that the HIV-1 capsidic glycoprotein gp120 (strain IIIB) modulates presynaptic release-regulating NMDA receptors on noradrenergic and glutamatergic terminals. This study aims to assess whether the chemokine CXC4 receptors (CXCR4s) has a role in the gp120-mediated effects. The effect of CXCL12, the endogenous ligand at CXCR4, on the NMDA-mediated releasing activity was therefore investigated. Rat hippocampal synaptosomes were preloaded with [3H]noradrenaline ([3H]NA) or [3H]D-aspartate ([3H]D-Asp) and acutely exposed to CXCL12, to NMDA or to both agonists. CXCL12, inactive on its own, facilitated the NMDA-evoked tritium release. The NMDA antagonist MK-801 abolished the NMDA/CXCL12-evoked tritium release of both radiolabelled tracers, while the CXCR4 antagonist AMD 3100 halved it, suggesting that rat hippocampal nerve endings possess presynaptic release-regulating CXCR4 receptors colocalized with NMDA receptors. Accordingly, Western blot analysis confirmed the presence of CXCR4 proteins in synaptosomal plasmamembranes. In both synaptosomal preparations, CXCL12-induced facilitation of NMDA-mediated release was dependent upon PLC-mediated src-induced events leading to mobilization of Ca2+ from intraterminal IP3-sensitive stores Finally, the gp120-induced facilitation of NMDA-mediated release of [3H]NA and [3H]D-Asp was prevented by AMD 3100. We propose that CXCR4s are functionally coupled to NMDA receptors in rat hippocampal noradrenergic and glutamatergic terminals and account for the gp120-induced modulation of the NMDA-mediated central effects. The NMDA/CXCR4 cross-talk could have a role in the neuropsychiatric symptoms often observed in HIV-1 positive patients.
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Affiliation(s)
- Silvia Di Prisco
- Department of Pharmacy, DIFAR, Pharmacology and Toxicology Section, University of Genoa, Viale Cembrano 4, 16148, Genoa, Italy
| | - Guendalina Olivero
- Department of Pharmacy, DIFAR, Pharmacology and Toxicology Section, University of Genoa, Viale Cembrano 4, 16148, Genoa, Italy
| | - Elisa Merega
- Department of Pharmacy, DIFAR, Pharmacology and Toxicology Section, University of Genoa, Viale Cembrano 4, 16148, Genoa, Italy
| | - Tommaso Bonfiglio
- Department of Pharmacy, DIFAR, Pharmacology and Toxicology Section, University of Genoa, Viale Cembrano 4, 16148, Genoa, Italy
| | - Mario Marchi
- Department of Pharmacy, DIFAR, Pharmacology and Toxicology Section, University of Genoa, Viale Cembrano 4, 16148, Genoa, Italy.,Center of Excellence for Biomedical Research, University of Genoa, Viale Benedetto XV, 16132, Genoa, Italy
| | - Anna Pittaluga
- Department of Pharmacy, DIFAR, Pharmacology and Toxicology Section, University of Genoa, Viale Cembrano 4, 16148, Genoa, Italy. .,Center of Excellence for Biomedical Research, University of Genoa, Viale Benedetto XV, 16132, Genoa, Italy.
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30
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Parravicini C, Daniele S, Palazzolo L, Trincavelli ML, Martini C, Zaratin P, Primi R, Coppolino G, Gianazza E, Abbracchio MP, Eberini I. A promiscuous recognition mechanism between GPR17 and SDF-1: Molecular insights. Cell Signal 2016; 28:631-42. [PMID: 26971834 DOI: 10.1016/j.cellsig.2016.03.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 02/29/2016] [Accepted: 03/06/2016] [Indexed: 01/19/2023]
Abstract
Recent data and publications suggest a promiscuous behaviour for GPR17, a class-A GPCR operated by different classes of ligands, such as uracil nucleotides, cysteinyl-leukotrienes and oxysterols. This observation, together with the ability of several class-A GPCRs to form homo- and hetero-dimers, is likely to unveil new pathophysiological roles and novel emerging pharmacological properties for some of these GPCRs, including GPR17. This receptor shares structural, phylogenetic and functional properties with some chemokine receptors, CXCRs. Both GPR17 and CXCR2 are operated by oxysterols, and both GPR17 and CXCR ligands have been demonstrated to have a role in orchestrating inflammatory responses and oligodendrocyte precursor cell differentiation to myelinating cells in acute and chronic diseases of the central nervous system. Here, by combining in silico modelling data with in vitro validation in (i) a classical reference pharmacological assay for GPCR activity and (ii) a model of maturation of primary oligodendrocyte precursor cells, we demonstrate that GPR17 can be activated by SDF-1, a ligand of chemokine receptors CXCR4 and CXCR7, and investigate the underlying molecular recognition mechanism. We also demonstrate that cangrelor, a GPR17 orthosteric antagonist, can block the SDF-1-mediated activation of GPR17 in a concentration-dependent manner. The ability of GPR17 to respond to different classes of GPCR ligands suggests that this receptor modifies its function depending on the extracellular mileu changes occurring under specific pathophysiological conditions and advocates it as a strategic target for neurodegenerative diseases with an inflammatory/immune component.
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Affiliation(s)
- Chiara Parravicini
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milano, Italy.
| | - Simona Daniele
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milano, Italy; Dipartimento di Farmacia, Università degli Studi di Pisa, Via Bonanno Pisano 6, 56126 Pisa, Italy.
| | - Luca Palazzolo
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milano, Italy.
| | | | - Claudia Martini
- Dipartimento di Farmacia, Università degli Studi di Pisa, Via Bonanno Pisano 6, 56126 Pisa, Italy.
| | - Paola Zaratin
- Fondazione Italiana Sclerosi Multipla, Via Operai 40, 16149 Genova, Italy.
| | - Roberto Primi
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milano, Italy.
| | - Giusy Coppolino
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milano, Italy.
| | - Elisabetta Gianazza
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milano, Italy.
| | - Maria P Abbracchio
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milano, Italy.
| | - Ivano Eberini
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milano, Italy; Dipartimento di Scienze Biomediche e Cliniche "L. Sacco", Università degli Studi di Milano, Via Gian Battista Grassi 74, 20157 Milano, Italy.
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31
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Resveratrol Protects PC12 Cell against 6-OHDA Damage via CXCR4 Signaling Pathway. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:730121. [PMID: 26681969 PMCID: PMC4670657 DOI: 10.1155/2015/730121] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 10/21/2015] [Accepted: 10/25/2015] [Indexed: 12/20/2022]
Abstract
Resveratrol, herbal nonflavonoid polyphenolic compound naturally derived from grapes, has long been acknowledged to possess extensive biological and pharmacological properties including antioxidant and anti-inflammatory ones and may exert a neuroprotective effect on neuronal damage in neurodegenerative diseases. However, the underlying molecular mechanisms remain undefined. In the present study, we intended to investigate the neuroprotective effects of resveratrol against 6-OHDA-induced neurotoxicity of PC12 cells and further explore the possible mechanisms involved. For this purpose, PC12 cells were exposed to 6-OHDA in the presence of resveratrol (0, 12.5, 25, and 50 μM). The results showed that resveratrol increased cell viability, alleviated the MMP reduction, and reduced the number of apoptotic cells as measured by MTT assay, JC-1 staining, and Hoechst/PI double staining (all p < 0.01). Immunofluorescent staining and Western blotting revealed that resveratrol averts 6-OHDA induced CXCR4 upregulation (p < 0.01). Our results demonstrated that resveratrol could effectively protect PC12 cells from 6-OHDA-induced oxidative stress and apoptosis via CXCR4 signaling pathway.
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32
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Cash-Padgett T, Sawa A, Jaaro-Peled H. Increased stereotypy in conditional Cxcr4 knockout mice. Neurosci Res 2015; 105:75-9. [PMID: 26458529 DOI: 10.1016/j.neures.2015.10.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 10/01/2015] [Accepted: 10/02/2015] [Indexed: 10/22/2022]
Abstract
Chemokines play important roles in the central nervous system, including mediating neuroinflammation and guiding the intracortical migration of interneurons during development. Alteration in parvalbumin-positive interneurons is a key neuropathological hallmark of multiple mental conditions. We recently reported a significant reduction in the expression of CXCL12 in olfactory neurons from sporadic cases with schizophrenia compared with matched controls, suggesting a role for CXCR4/CXCL12 signaling in mental conditions. Thus, we depleted the chemokine receptor Cxcr4 from mice using the parvalbumin-2A-Cre line. The conditional knockout mice exhibited a unique behavioral phenotype involving increased stereotypy. Stereotypy is observed in many psychiatric conditions, including schizophrenia, autism, and dementia. Thus, the Cxcr4 conditional knockout mice may serve as a model for this symptomatic feature.
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Affiliation(s)
- Tyler Cash-Padgett
- Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Akira Sawa
- Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Hanna Jaaro-Peled
- Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States.
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33
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Gong X, Liu Y, Liu FL, Jin L, Wang H, Zheng YT. A SDF1 genetic variant confers resistance to HIV-1 infection in intravenous drug users in China. INFECTION GENETICS AND EVOLUTION 2015; 34:137-42. [PMID: 26168882 DOI: 10.1016/j.meegid.2015.07.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 07/08/2015] [Accepted: 07/09/2015] [Indexed: 12/16/2022]
Abstract
Despite repeated exposures to HIV-1, some individuals remain uninfected, suggesting that genetic factors confer host resistance to HIV-1 acquisition. The chemokine receptors CCR5, CXCR4 and the principal ligand SDF1 of CXCR4 play an important role for the entry of HIV-1 to target cells. To explore the relationship between genetic variants and HIV-1 infection, 11 common SNPs in CCR5, CXCR4 and SDF1 were genotyped in 921 male intravenous drug users (IDUs), of which 263 individuals were HIV-1-exposed seropositive (HESP) and 658 were HIV-1-exposed seronegative (HESN). According to the situation of syringe-sharing, the whole cohort was divided into two subgroups: syringe-sharing (SS) and syringe-not-sharing (SNS). We found that in the SNS subgroup rs17540465 of SDF1 showed significant difference of allele and genotype frequencies between HESP IDUs and HESN IDUs, but not in the SS subgroup. HESP with SNS carried significantly less allele A compared with HESN with SNS, indicating a protective role of allele A against HIV-1 infection. Syringe-sharing IDUs are supposed to be exposed highly to HIV-1 infection risk due to the direct transfer of HIV-1 infected blood to another. For syringe-not-sharing IDUs, sexual contact may be the major route of HIV-1 transmission. Considering the different route of HIV-1 transfection between two subgroups, we speculate that SDF1 may contribute susceptibility to HIV-1 infection in the route of sexual intercourse.
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Affiliation(s)
- Xiaohong Gong
- The State Key Laboratory of Genetic Engineering and MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Road Songhu 1045, Shanghai, China.
| | - Yanyan Liu
- The State Key Laboratory of Genetic Engineering and MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Road Songhu 1045, Shanghai, China; The Teaching and Research Section of Biochemistry and Molecular Biology, Institute of Chinese and Western Medicine Combined with Clinical, Anhui University of Chinese Medicine, Anhui, China
| | - Feng-Liang Liu
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Li Jin
- The State Key Laboratory of Genetic Engineering and MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Road Songhu 1045, Shanghai, China
| | - Hongyan Wang
- The State Key Laboratory of Genetic Engineering and MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Road Songhu 1045, Shanghai, China
| | - Yong-Tang Zheng
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China.
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34
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Belmadani A, Ren D, Bhattacharyya BJ, Rothwangl KB, Hope TJ, Perlman H, Miller RJ. Identification of a sustained neurogenic zone at the dorsal surface of the adult mouse hippocampus and its regulation by the chemokine SDF-1. Hippocampus 2015; 25:1224-41. [PMID: 25656357 DOI: 10.1002/hipo.22428] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/22/2015] [Indexed: 11/07/2022]
Abstract
We identified a previously unknown neurogenic region at the dorsal surface of the hippocampus; (the "subhippocampal zone," SHZ) in the adult brain. Using a reporter mouse in which SHZ cells and their progeny could be traced through the expression of EGFP under the control of the CXCR4 chemokine receptor promoter we observed the presence of a pool of EGFP expressing cells migrating in direction of the dentate gyrus (DG), which is maintained throughout adulthood. This population appeared to originate from the SHZ where cells entered a caudal migratory stream (aCMS) that included the fimbria, the meninges and the DG. Deletion of CXCR4 from neural stem cells (NSCs) or neuroinflammation resulted in the appearance of neurons in the DG, which were the result of migration of NSCs from the SHZ. Some of these neurons were ectopically placed. Our observations indicate that the SHZ is a neurogenic zone in the adult brain through migration of NSCs in the aCMS. Regulation of CXCR4 signaling in these cells may be involved in repair of the DG and may also give rise to ectopic granule cells in the DG in the context of neuropathology.
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Affiliation(s)
- Abdelhak Belmadani
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Dongjun Ren
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Bula J Bhattacharyya
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Katharina B Rothwangl
- Department of Cell and Molecular Biology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Thomas J Hope
- Department of Cell and Molecular Biology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Harris Perlman
- Department of Medicine and Rheumatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Richard J Miller
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
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Li Y, Huang J, He X, Tang G, Tang YH, Liu Y, Lin X, Lu Y, Yang GY, Wang Y. Postacute Stromal Cell–Derived Factor-1α Expression Promotes Neurovascular Recovery in Ischemic Mice. Stroke 2014; 45:1822-9. [DOI: 10.1161/strokeaha.114.005078] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yaning Li
- From the Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering (Y.L., J.H., X.H., G.T., Y.-H.T., X.L., Y. Lu, G.-Y.Y., Y.W.) and Department of Neurology, Ruijin Hospital, School of Medicine (Y. Liu, G.-Y.Y.), Shanghai Jiao Tong University, Shanghai, China
| | - Jun Huang
- From the Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering (Y.L., J.H., X.H., G.T., Y.-H.T., X.L., Y. Lu, G.-Y.Y., Y.W.) and Department of Neurology, Ruijin Hospital, School of Medicine (Y. Liu, G.-Y.Y.), Shanghai Jiao Tong University, Shanghai, China
| | - Xiaosong He
- From the Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering (Y.L., J.H., X.H., G.T., Y.-H.T., X.L., Y. Lu, G.-Y.Y., Y.W.) and Department of Neurology, Ruijin Hospital, School of Medicine (Y. Liu, G.-Y.Y.), Shanghai Jiao Tong University, Shanghai, China
| | - Guanghui Tang
- From the Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering (Y.L., J.H., X.H., G.T., Y.-H.T., X.L., Y. Lu, G.-Y.Y., Y.W.) and Department of Neurology, Ruijin Hospital, School of Medicine (Y. Liu, G.-Y.Y.), Shanghai Jiao Tong University, Shanghai, China
| | - Yao-Hui Tang
- From the Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering (Y.L., J.H., X.H., G.T., Y.-H.T., X.L., Y. Lu, G.-Y.Y., Y.W.) and Department of Neurology, Ruijin Hospital, School of Medicine (Y. Liu, G.-Y.Y.), Shanghai Jiao Tong University, Shanghai, China
| | - Yanqun Liu
- From the Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering (Y.L., J.H., X.H., G.T., Y.-H.T., X.L., Y. Lu, G.-Y.Y., Y.W.) and Department of Neurology, Ruijin Hospital, School of Medicine (Y. Liu, G.-Y.Y.), Shanghai Jiao Tong University, Shanghai, China
| | - Xiaojie Lin
- From the Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering (Y.L., J.H., X.H., G.T., Y.-H.T., X.L., Y. Lu, G.-Y.Y., Y.W.) and Department of Neurology, Ruijin Hospital, School of Medicine (Y. Liu, G.-Y.Y.), Shanghai Jiao Tong University, Shanghai, China
| | - Yifan Lu
- From the Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering (Y.L., J.H., X.H., G.T., Y.-H.T., X.L., Y. Lu, G.-Y.Y., Y.W.) and Department of Neurology, Ruijin Hospital, School of Medicine (Y. Liu, G.-Y.Y.), Shanghai Jiao Tong University, Shanghai, China
| | - Guo-Yuan Yang
- From the Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering (Y.L., J.H., X.H., G.T., Y.-H.T., X.L., Y. Lu, G.-Y.Y., Y.W.) and Department of Neurology, Ruijin Hospital, School of Medicine (Y. Liu, G.-Y.Y.), Shanghai Jiao Tong University, Shanghai, China
| | - Yongting Wang
- From the Neuroscience and Neuroengineering Research Center, Med-X Research Institute and School of Biomedical Engineering (Y.L., J.H., X.H., G.T., Y.-H.T., X.L., Y. Lu, G.-Y.Y., Y.W.) and Department of Neurology, Ruijin Hospital, School of Medicine (Y. Liu, G.-Y.Y.), Shanghai Jiao Tong University, Shanghai, China
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Wang S, Zhang S, Li J, Xu X, Weng Y, Zheng M, Ouyang L, Li F. CXCL12-induced upregulation of FOXM1 expression promotes human glioblastoma cell invasion. Biochem Biophys Res Commun 2014; 447:1-6. [DOI: 10.1016/j.bbrc.2013.12.079] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 12/15/2013] [Indexed: 01/05/2023]
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Sun W, Liu J, Huan Y, Zhang C. Intracranial injection of recombinant stromal-derived factor-1 alpha (SDF-1α) attenuates traumatic brain injury in rats. Inflamm Res 2013; 63:287-97. [PMID: 24352531 DOI: 10.1007/s00011-013-0699-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Revised: 12/01/2013] [Accepted: 12/08/2013] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE This study was conducted to investigate the role of stromal-derived factor-1 alpha (SDF-1α) in a secondary brain injury after traumatic brain injury (TBI) in rats, and to further elucidate its underlying regulatory mechanisms. MATERIALS AND METHODS Male Sprague-Dawley rats underwent TBI for 30 min, and then received intracranial injections of recombinant SDF-1α, SDF-1α antibody, or saline as a vehicle control. At 24 h after TBI, brain tissues from the experimental animals were subjected to histology, immunohistochemistry, quantitative real-time polymerase chain reaction (PCR), enzyme-linked immunosorbent assay (ELISA), and western blot analyses. RESULTS TBI-induced brain edema and blood-brain barrier disruption were ameliorated by post-injury injections of SDF-1α. TBI-induced neuronal degradation and apoptosis, accompanied by increased cleaved caspase-3, cleaved PARP and Bax, and decreased Bcl-2 were found to be attenuated by SDF-1α injection. Nitric oxide (NO) and inducible nitric oxide synthase (iNOS) levels decreased in SDF-1α treated animals after TBI. SDF-1α repressed inflammatory responses by inhibiting the expression of pro-inflammatory cytokines, such as TNF-α, IL-1β, and IL-6. However, neutralizing the effect of SDF-1α with its antibody abolished these therapeutic alterations in TBI animals. Importantly, SDF-1α attenuated the brain lesion by affecting the ERK and NF-κB signaling pathways after mechanical head trauma in rats. CONCLUSIONS SDF-1α ameliorates mechanical trauma-induced pathological changes via its anti-apoptotic and anti-inflammatory action in the brain.
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Affiliation(s)
- Weifeng Sun
- Department of Neurology, The First Affiliated Hospital of China Medical University, 155 North Nanjing Street, Shenyang, 110001, People's Republic of China
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Yang S, Edman LC, Sánchez-Alcañiz JA, Fritz N, Bonilla S, Hecht J, Uhlén P, Pleasure SJ, Villaescusa JC, Marín O, Arenas E. Cxcl12/Cxcr4 signaling controls the migration and process orientation of A9-A10 dopaminergic neurons. Development 2013; 140:4554-64. [PMID: 24154522 DOI: 10.1242/dev.098145] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
CXCL12/CXCR4 signaling has been reported to regulate three essential processes for the establishment of neural networks in different neuronal systems: neuronal migration, cell positioning and axon wiring. However, it is not known whether it regulates the development of A9-A10 tyrosine hydroxylase positive (TH(+)) midbrain dopaminergic (mDA) neurons. We report here that Cxcl12 is expressed in the meninges surrounding the ventral midbrain (VM), whereas CXCR4 is present in NURR1(+) mDA precursors and mDA neurons from E10.5 to E14.5. CXCR4 is activated in NURR1(+) cells as they migrate towards the meninges. Accordingly, VM meninges and CXCL12 promoted migration and neuritogenesis of TH(+) cells in VM explants in a CXCR4-dependent manner. Moreover, in vivo electroporation of Cxcl12 at E12.5 in the basal plate resulted in lateral migration, whereas expression in the midline resulted in retention of TH(+) cells in the IZ close to the midline. Analysis of Cxcr4(-/-) mice revealed the presence of VM TH(+) cells with disoriented processes in the intermediate zone (IZ) at E11.5 and marginal zone (MZ) at E14. Consistently, pharmacological blockade of CXCR4 or genetic deletion of Cxcr4 resulted in an accumulation of TH(+) cells in the lateral aspect of the IZ at E14, indicating that CXCR4 is required for the radial migration of mDA neurons in vivo. Altogether, our findings demonstrate that CXCL12/CXCR4 regulates the migration and orientation of processes in A9-A10 mDA neurons.
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Affiliation(s)
- Shanzheng Yang
- Laboratory of Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Scheeles väg 1, 17177 Stockholm, Sweden
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The chemokine system, and its CCR5 and CXCR4 receptors, as potential targets for personalized therapy in cancer. Cancer Lett 2013; 352:36-53. [PMID: 24141062 DOI: 10.1016/j.canlet.2013.10.006] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 10/07/2013] [Accepted: 10/10/2013] [Indexed: 11/21/2022]
Abstract
Chemokines and their receptors regulate the trafficking of leukocytes in hematopoiesis and inflammation, and thus are fundamental to the immune integrity of the host. In parallel, members of the chemokine system exert a large variety of functions that dictate processes of cancer development and progression. Chemokines can act as pro-tumoral or anti-tumoral regulators of malignancy by affecting cells of the tumor microenvironment (leukocytes, endothelial cells, fibroblasts) and the tumor cells themselves (migration, invasion, proliferation, resistance to chemotherapy). Several of the chemokines are generally skewed towards the cancer-promoting direction, including primarily the CCR5-CCL5 (RANTES) and the CXCR4-CXCL12 (SDF-1) axes. This review provides a general view of chemokines and chemokine receptors as regulators of malignancy, describing their multi-faceted activities in cancer. The tumor-promoting activities of the CCR5-CCL5 and CXCR4-CXCL12 pathways are enlightened, emphasizing their potential use as targets for personalized therapy. Indeed, novel blockers of chemokines and their receptors are constantly emerging, and two chemokine receptor inhibitors were recently approved for clinical use: Maraviroc for CCR5 and Plerixafor for CXCR4. The review addresses ongoing pre-clinical and clinical trials using these modalities and others in cancer. Then, challenges and opportunities of personalized therapy directed against chemokines and their receptors in malignancy are discussed, demonstrating that such novel personalized cancer therapies hold many challenges, but also offer hope for cancer patients.
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Mithal DS, Ren D, Miller RJ. CXCR4 signaling regulates radial glial morphology and cell fate during embryonic spinal cord development. Glia 2013; 61:1288-305. [PMID: 23828719 DOI: 10.1002/glia.22515] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 03/04/2013] [Accepted: 04/01/2013] [Indexed: 12/20/2022]
Abstract
Embryonic meninges secrete the chemokine SDF-1/CXCL12 as a chemotactic guide for migrating neural stem cells, but SDF-1 is not known to directly regulate the functions of radial glia. Recently, the developing meninges have been shown to regulate radial glial function, yet the mechanisms and signals responsible for this phenomenon remain unclear. Moreover, as a nonmigratory cell type, radial glia do not conform to traditional models associated with chemokine signaling in the central nervous system. Using fluorescent transgenes, in vivo genetic manipulations and pharmacological techniques, we demonstrate that SDF-1 derived from the meninges exerts a CXCR4-dependent effect on radial glia. Deletion of CXCR4 expression by radial glia influences their morphology, mitosis, and progression through both oligodendroglial and astroglial lineages. Additionally, disruption of CXCR4 signaling in radial glia has a transient effect on the migration of oligodendrocyte progenitors. These data indicate that a specific chemokine signal derived from the meninges has multiple regulatory effects on radial glia.
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Affiliation(s)
- Divakar S Mithal
- Department of Molecular Pharmacology and Biological Chemistry, Northwestern University, 303 E Chicago Ave, Chicago, IL 60611, USA
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Distinct modifications in Kv2.1 channel via chemokine receptor CXCR4 regulate neuronal survival-death dynamics. J Neurosci 2013; 32:17725-39. [PMID: 23223293 DOI: 10.1523/jneurosci.3029-12.2012] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The chemokine stromal cell-derived factor-1α (SDF-1α) has multiple effects on neuronal activity, survival, and death under conditions that generate a proinflammatory microenvironment within the brain, via signaling through C-X-C-type chemokine receptor 4 (CXCR4), although the underlying cellular/molecular mechanisms are unclear. Using rat hippocampal neurons, we investigated distinct modifications in the voltage-gated K⁺ (Kv) channel Kv2.1 in response to short- and long-term SDF-1α/CXCR4-mediated signaling as an underlying mechanism for CXCR4-dependent regulation of neuronal survival and death. Acute exposure of neurons to SDF-1α led to dynamic dephosphorylation and altered localization of Kv2.1 channel, resulting in enhanced voltage-dependent activation of Kv2.1-based delayed-rectifier Kv currents (I(DR)). These changes were dependent on CXCR4- and/or NMDA receptor-mediated activation of calcineurin and provide neuroprotection. However, prolonged SDF-1α treatment leads to CXCR4-mediated activation of p38 mitogen-activated protein kinase, resulting in phosphorylation of Kv2.1 at S800 and enhanced surface trafficking of the channel protein, resulting in increased I(DR)/Kv2.1 current density. This, in combination with sustained dephosphorylation-induced enhancement of the voltage-dependent activation of I(DR)/Kv2.1, predisposed neurons to excessive K⁺ efflux, a vital step for the neuronal apoptotic program. Such apoptotic death was dependent on CXCR4 and Kv2.1 function and was absent in cells expressing the Kv2.1-S800A mutant channel. Furthermore, similar modifications in Kv2.1 and CXCR4/Kv2.1-dependent apoptosis were observed following treatment of neurons with the human immunodeficiency virus-1 (HIV-1) glycoprotein gp120. Therefore, distinct modifications in Kv2.1 in response to short- and long-term CXCR4-mediated signaling could provide a basis for neuroprotection or apoptosis in neuropathologies, such as neuroinflammation, stroke, brain tumors, and HIV-associated neurodegeneration.
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Rogers TJ. The molecular basis for neuroimmune receptor signaling. J Neuroimmune Pharmacol 2012; 7:722-4. [PMID: 22935971 PMCID: PMC4011130 DOI: 10.1007/s11481-012-9398-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Accepted: 08/21/2012] [Indexed: 10/28/2022]
Abstract
Many of the receptors which are responsible for the responses to the common drugs of abuse belong to the G protein-coupled receptor (GPCR) family. In this special issue of the Journal of Neuroimmune Pharmacology a collection of papers is presented which deals with signaling events that are important for the function of these receptors. Because these receptors are expressed by both neuronal and immune cells, and because these receptors play a complex role in regulating function in both the nervous and immune systems, a more complete understanding of the regulation of expression of these receptors is essential. Moreover, once these receptors are expressed and activated, a complex series of signaling events are initiated that can have substantial significance. We have only a limited understanding of these signaling events, but with more complete information, we may be able to control the undesirable and/or desirable consequences of receptor activation by drugs of abuse.
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MESH Headings
- Analgesics, Opioid/pharmacology
- Animals
- Arachidonic Acids/pharmacology
- Cannabinoid Receptor Agonists/pharmacology
- Cannabinoid Receptor Modulators/pharmacology
- Cannabinoids/pharmacology
- Chemokine CXCL12/physiology
- Dronabinol/pharmacology
- Endocannabinoids/pharmacology
- Female
- HIV Envelope Protein gp120/toxicity
- HIV-1/physiology
- Humans
- Lymphocyte Activation/physiology
- Lymphocytes/physiology
- MicroRNAs/physiology
- Morphine/toxicity
- Narcotics/toxicity
- Neostriatum/cytology
- Nervous System/growth & development
- Neurons/pathology
- Polyunsaturated Alkamides/pharmacology
- Pregnancy
- Receptor, Cannabinoid, CB1/drug effects
- Receptor, Cannabinoid, CB2/drug effects
- Receptors, Cannabinoid
- Receptors, G-Protein-Coupled/drug effects
- Receptors, G-Protein-Coupled/physiology
- Receptors, Opioid, mu/biosynthesis
- Receptors, Opioid, mu/drug effects
- Signal Transduction/physiology
- T-Lymphocytes/physiology
- T-Lymphocytes, Cytotoxic/drug effects
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Decimo I, Fumagalli G, Berton V, Krampera M, Bifari F. Meninges: from protective membrane to stem cell niche. AMERICAN JOURNAL OF STEM CELLS 2012; 1:92-105. [PMID: 23671802 PMCID: PMC3636743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 05/23/2012] [Indexed: 06/02/2023]
Abstract
Meninges are a three tissue membrane primarily known as coverings of the brain. More in depth studies on meningeal function and ultrastructure have recently changed the view of meninges as a merely protective membrane. Accurate evaluation of the anatomical distribution in the CNS reveals that meninges largely penetrate inside the neural tissue. Meninges enter the CNS by projecting between structures, in the stroma of choroid plexus and form the perivascular space (Virchow-Robin) of every parenchymal vessel. Thus, meninges may modulate most of the physiological and pathological events of the CNS throughout the life. Meninges are present since the very early embryonic stages of cortical development and appear to be necessary for normal corticogenesis and brain structures formation. In adulthood meninges contribute to neural tissue homeostasis by secreting several trophic factors including FGF2 and SDF-1. Recently, for the first time, we have identified the presence of a stem cell population with neural differentiation potential in meninges. In addition, we and other groups have further described the presence in meninges of injury responsive neural precursors. In this review we will give a comprehensive view of meninges and their multiple roles in the context of a functional network with the neural tissue. We will highlight the current literature on the developmental feature of meninges and their role in cortical development. Moreover, we will elucidate the anatomical distribution of the meninges and their trophic properties in adult CNS. Finally, we will emphasize recent evidences suggesting the potential role of meninges as stem cell niche harbouring endogenous precursors that can be activated by injury and are able to contribute to CNS parenchymal reaction.
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Affiliation(s)
- Ilaria Decimo
- Department of Public Health and Community Medicine, Section of Pharmacology, University of VeronaItaly
| | - Guido Fumagalli
- Department of Public Health and Community Medicine, Section of Pharmacology, University of VeronaItaly
| | - Valeria Berton
- Department of Public Health and Community Medicine, Section of Pharmacology, University of VeronaItaly
| | - Mauro Krampera
- Department of Medicine, Stem Cell Laboratory, Section of Hematology, University of VeronaItaly
| | - Francesco Bifari
- Department of Medicine, Stem Cell Laboratory, Section of Hematology, University of VeronaItaly
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