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Leite-Aguiar R, Bello-Santos VG, Castro NG, Coutinho-Silva R, Savio LEB. Techniques for evaluating the ATP-gated ion channel P2X7 receptor function in macrophages and microglial cells. J Immunol Methods 2024; 532:113727. [PMID: 38997100 DOI: 10.1016/j.jim.2024.113727] [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: 02/19/2024] [Revised: 05/31/2024] [Accepted: 07/08/2024] [Indexed: 07/14/2024]
Abstract
Resident macrophages are tissue-specific innate immune cells acting as sentinels, constantly patrolling their assigned tissue to maintain homeostasis, and quickly responding to pathogenic invaders or molecular danger signals molecules when necessary. Adenosine triphosphate (ATP), when released to the extracellular medium, acts as a danger signal through specific purinergic receptors. Interaction of ATP with the purinergic receptor P2X7 activates macrophages and microglial cells in different pathological conditions, triggering inflammation. The highly expressed P2X7 receptor in these cells induces cell membrane permeabilization, inflammasome activation, cell death, and the production of inflammatory mediators, including cytokines and nitrogen and oxygen-reactive species. This review explores the techniques to evaluate the functional and molecular aspects of the P2X7 receptor, particularly in macrophages and microglial cells. Polymerase chain reaction (PCR), Western blotting, and immunocytochemistry or immunohistochemistry are essential for assessing gene and protein expression in these cell types. Evaluation of P2X7 receptor function involves the use of ATP and selective agonists and antagonists and diverse techniques, including electrophysiology, intracellular calcium measurements, ethidium bromide uptake, and propidium iodide cell viability assays. These techniques are crucial for studying the role of P2X7 receptors in immune responses, neuroinflammation, and various pathological conditions. Therefore, a comprehensive understanding of the functional and molecular aspects of the P2X7 receptor in macrophages and microglia is vital for unraveling its involvement in immune modulation and its potential as a therapeutic target. The methodologies presented and discussed herein offer valuable tools for researchers investigating the complexities of P2X7 receptor signaling in innate immune cells in health and disease.
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Affiliation(s)
- Raíssa Leite-Aguiar
- Laboratório de Imunofisiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | | | - Robson Coutinho-Silva
- Laboratório de Imunofisiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Luiz Eduardo Baggio Savio
- Laboratório de Imunofisiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil..
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2
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Dabrowska S, Turano E, Scambi I, Virla F, Nodari A, Pezzini F, Galiè M, Bonetti B, Mariotti R. A Cellular Model of Amyotrophic Lateral Sclerosis to Study the Therapeutic Effects of Extracellular Vesicles from Adipose Mesenchymal Stem Cells on Microglial Activation. Int J Mol Sci 2024; 25:5707. [PMID: 38891895 PMCID: PMC11171908 DOI: 10.3390/ijms25115707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/16/2024] [Accepted: 05/17/2024] [Indexed: 06/21/2024] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease characterized by the progressive degeneration of upper and lower motor neurons (MNs) in the brain and spinal cord, leading to progressive paralysis and death. Increasing evidence indicates that neuroinflammation plays an important role in ALS's pathogenesis and disease progression. Neuroinflammatory responses, primarily driven by activated microglia and astrocytes, and followed by infiltrating peripheral immune cells, contribute to exacerbate/accelerate MN death. In particular, the role of the microglia in ALS remains unclear, partly due to the lack of experimental models that can fully recapitulate the complexity of ALS's pathology. In this study, we developed and characterized a microglial cell line, SIM-A9-expressing human mutant protein Cu+/Zn+ superoxide dismutase_1 (SIM-A9hSOD1(G93A)), as a suitable model in vitro mimicking the microglia activity in ALS. The expression of hSOD1(G93A) in SIM-A9 cells induced a change in their metabolic activity, causing polarization into a pro-inflammatory phenotype and enhancing reactive oxygen species production, which is known to activate cell death processes and apoptosis. Afterward, we used our microglial model as an experimental set-up to investigate the therapeutic action of extracellular vesicles isolated from adipose mesenchymal stem cells (ASC-EVs). ASC-EVs represent a promising therapeutic treatment for ALS due to their neuroprotective and immunomodulatory properties. Here, we demonstrated that treatment with ASC-EVs is able to modulate activated ALS microglia, reducing their metabolic activity and polarizing their phenotype toward an anti-inflammatory one through a mechanism of reduction of reactive oxygen species.
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Affiliation(s)
- Sylwia Dabrowska
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy; (S.D.); (E.T.); (I.S.); (F.V.); (A.N.); (M.G.)
- NeuroRepair Department, Mossakowski Medical Research Institute, Polish Academy of Sciences, Pawinskiego Street 5, 02-106 Warsaw, Poland
| | - Ermanna Turano
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy; (S.D.); (E.T.); (I.S.); (F.V.); (A.N.); (M.G.)
| | - Ilaria Scambi
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy; (S.D.); (E.T.); (I.S.); (F.V.); (A.N.); (M.G.)
| | - Federica Virla
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy; (S.D.); (E.T.); (I.S.); (F.V.); (A.N.); (M.G.)
| | - Alice Nodari
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy; (S.D.); (E.T.); (I.S.); (F.V.); (A.N.); (M.G.)
| | - Francesco Pezzini
- Department of Surgery, Dentistry, Paediatrics and Gynaecology (Child Neurology and Psychiatry), University of Verona, 37134 Verona, Italy;
| | - Mirco Galiè
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy; (S.D.); (E.T.); (I.S.); (F.V.); (A.N.); (M.G.)
| | - Bruno Bonetti
- Neurology Unit, Azienda Ospedaliera Universitaria Integrata, 37126 Verona, Italy;
| | - Raffaella Mariotti
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy; (S.D.); (E.T.); (I.S.); (F.V.); (A.N.); (M.G.)
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3
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Sun R, Wang YF, Yang X. Knockdown of IFIT3 ameliorates multiple sclerosis via selectively regulating M1 polarization of microglia in an experimental autoimmune encephalomyelitis model. Int Immunopharmacol 2024; 128:111501. [PMID: 38232539 DOI: 10.1016/j.intimp.2024.111501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 01/19/2024]
Abstract
The key to the treatment of multiple sclerosis (MS) is to promote the transition from inflammation-induced demyelination to remyelination. Polarization of microglia towards M1 or M2 phenotype is critical in this transition. Interferon induced protein with tetratricopeptide repeats 3 (IFIT3) is involved in inflammatory reaction and up-regulated in M1-polarized macrophages. However, its effect on microglia during MS has not been reported. In this paper, we demonstrated the important role of IFIT3 in selectively regulating microglia polarization. The expression of IFIT3 was increased when microglia were polarized towards M1, but did not change under M2 polarization. The knockdown of IFIT3 selectively inhibited M1 polarization, while M2 polarization was not affected by IFIT3 silencing. Furthermore, the activation of signal transducer and activator of transcription 1 (STAT1) and nuclear factor kappa-B (NF-ĸB) signaling in M1 polarized microglia was suppressed by downregulating IFIT3. In experimental autoimmune encephalitis (EAE) mice, an animal model of MS, IFIT3 expression was upregulated. The disease progression, inflammatory infiltration and demyelination in the EAE mice were alleviated by silencing IFIT3. The inhibitory effects of IFIT3 knockdown on M1 polarization and STAT1 and NF-ĸB pathways were also confirmed in the spinal cord of EAE mice. In summary, our findings suggest that IFIT3 selectively intensified microglia polarization towards the pro-inflammatory M1 phenotype, and may contribute to the progression of MS.
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Affiliation(s)
- Ran Sun
- Department of Neurology, Shengjing Hospital of China Medical University, No. 36, Sanhao Street, Shenyang 110004, China
| | - Yan-Fang Wang
- Department of Orthopedics, Shengjing Hospital of China Medical University, No. 36, Sanhao Street, Shenyang 110004, China
| | - Xue Yang
- Department of Neurology, Shengjing Hospital of China Medical University, No. 36, Sanhao Street, Shenyang 110004, China.
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Lima IS, Soares ÉN, Nonaka CKV, Souza BSDF, dos Santos BL, Costa SL. Flavonoid Rutin Presented Anti-Glioblastoma Activity Related to the Modulation of Onco miRNA-125b Expression and STAT3 Signaling and Impact on Microglia Inflammatory Profile. Brain Sci 2024; 14:90. [PMID: 38248305 PMCID: PMC10814059 DOI: 10.3390/brainsci14010090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/09/2024] [Accepted: 01/13/2024] [Indexed: 01/23/2024] Open
Abstract
Glioblastoma (GBM) is the most aggressive and treatment-resistant brain tumor. In the GBM microenvironment, interaction with microglia is associated with the dysregulation of cytokines, chemokines, and miRNAs, contributing to angiogenesis, proliferation, anti-apoptosis, and chemoresistance. The flavonoid rutin can inhibit glioma cell growth associated with microglial activation and production of pro-inflammatory mediators by mechanisms that are still poorly understood. The present study investigated the effect of rutin on viability, regulation of miRNA-125b, and the STAT3 expression in GBM cells, as well as the effects on the modulation of the inflammatory profile and STAT3 expression in microglia during indirect interaction with GBM cells. Human GL15-GBM cells and human C20 microglia were treated or not with rutin for 24 h. Rutin (30-50 μM) significantly reduced the viability of GL15 cells; however, it did not affect the viability of microglia. Rutin (30 μM) significantly reduced the expression of miRNA-125b in the cells and secretome and STAT3 expression. Microglia submitted to the conditioned medium from GBM cells treated with rutin showed reactive morphology associated with reduced expression of IL-6, TNF, and STAT3. These results reiterate the anti-glioma effects of the flavonoid, which may also modulate microglia towards a more responsive anti-tumor phenotype, constituting a promising molecule for adjuvant therapy to GBM.
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Affiliation(s)
- Irlã Santos Lima
- Laboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Salvador 40231-300, Brazil; (I.S.L.); (É.N.S.)
| | - Érica Novaes Soares
- Laboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Salvador 40231-300, Brazil; (I.S.L.); (É.N.S.)
| | - Carolina Kymie Vasques Nonaka
- Center of Biotechnology and Cell Therapy, São Rafael Hospital, D’Or Institute for Research and Teaching (IDOR), Salvador 41253-190, Brazil; (C.K.V.N.); (B.S.d.F.S.)
| | - Bruno Solano de Freitas Souza
- Center of Biotechnology and Cell Therapy, São Rafael Hospital, D’Or Institute for Research and Teaching (IDOR), Salvador 41253-190, Brazil; (C.K.V.N.); (B.S.d.F.S.)
| | - Balbino Lino dos Santos
- Laboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Salvador 40231-300, Brazil; (I.S.L.); (É.N.S.)
- College of Nursing, Federal University of Vale do São Francisco, Petrolina 56304-917, Brazil
| | - Silvia Lima Costa
- Laboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Salvador 40231-300, Brazil; (I.S.L.); (É.N.S.)
- National Institute of Translation Neuroscience (INNT), Rio de Janeiro 21941-902, Brazil
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5
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Ma YM, Zhao L. Mechanism and Therapeutic Prospect of miRNAs in Neurodegenerative Diseases. Behav Neurol 2023; 2023:8537296. [PMID: 38058356 PMCID: PMC10697780 DOI: 10.1155/2023/8537296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 08/30/2023] [Accepted: 10/21/2023] [Indexed: 12/08/2023] Open
Abstract
MicroRNAs (miRNAs) are the smallest class of noncoding RNAs, which widely exist in animals and plants. They can inhibit translation or overexpression by combining with mRNA and participate in posttranscriptional regulation of genes, resulting in reduced expression of target proteins, affecting the development, growth, aging, metabolism, and other physiological and pathological processes of animals and plants. It is a powerful negative regulator of gene expression. It mediates the information exchange between different cellular pathways in cellular homeostasis and stress response and regulates the differentiation, plasticity, and neurotransmission of neurons. In neurodegenerative diseases, in addition to the complex interactions between genetic susceptibility and environmental factors, miRNAs can serve as a promising diagnostic tool for diseases. They can also increase or reduce neuronal damage by regulating the body's signaling pathways, immune system, stem cells, gut microbiota, etc. They can not only affect the occurrence of diseases and exacerbate disease progression but also promote neuronal repair and reduce apoptosis, to prevent and slow down the development of diseases. This article reviews the research progress of miRNAs on the mechanism and treatment of neurodegenerative diseases in the nervous system. This trial is registered with NCT01819545, NCT02129452, NCT04120493, NCT04840823, NCT02253732, NCT02045056, NCT03388242, NCT01992029, NCT04961450, NCT03088839, NCT04137926, NCT02283073, NCT04509271, NCT02859428, and NCT05243017.
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Affiliation(s)
- Ya-Min Ma
- Acupuncture and Massage Department of Nanyang Traditional Chinese Medicine Hospital, Wo Long District, Nanyang City 473000, China
| | - Lan Zhao
- Tianjin Key Laboratory of Acupuncture and Moxibustion, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Xiqing District, Tianjin 300381, China
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Carata E, Muci M, Di Giulio S, Mariano S, Panzarini E. Looking to the Future of the Role of Macrophages and Extracellular Vesicles in Neuroinflammation in ALS. Int J Mol Sci 2023; 24:11251. [PMID: 37511010 PMCID: PMC10379393 DOI: 10.3390/ijms241411251] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/04/2023] [Accepted: 07/07/2023] [Indexed: 07/30/2023] Open
Abstract
Neuroinflammation is a common pathological feature of amyotrophic lateral sclerosis (ALS). Although scientific evidence to date does not allow defining neuroinflammation as an ALS trigger, its role in exacerbating motor neuron (MNs) degeneration and disease progression is attracting research interest. Activated CNS (Central Nervous System) glial cells, proinflammatory peripheral and infiltrated T lymphocytes and monocytes/macrophages, as well as the immunoreactive molecules they release, represent the active players for the role of immune dysregulation enhancing neuroinflammation. The crosstalk between the peripheral and CNS immune cells significantly correlates with the survival of ALS patients since the modification of peripheral macrophages can downregulate inflammation at the periphery along the nerves and in the CNS. As putative vehicles for misfolded protein and inflammatory mediators between cells, extracellular vesicles (EVs) have also drawn particular attention in the field of ALS. Both CNS and peripheral immune cells release EVs, which are able to modulate the behavior of neighboring recipient cells; unfortunately, the mechanisms involved in EVs-mediated communication in neuroinflammation remain unclear. This review aims to synthesize the current literature regarding EV-mediated cell-to-cell communication in the brain under ALS, with a particular point of view on the role of peripheral macrophages in responding to inflammation to understand the biological process and exploit it for ALS management.
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Affiliation(s)
- Elisabetta Carata
- Department of Biological Sciences and Technologies (Di.S.Te.B.A.), University of Salento, 73100 Lecce, Italy
| | - Marco Muci
- Department of Biological Sciences and Technologies (Di.S.Te.B.A.), University of Salento, 73100 Lecce, Italy
| | - Simona Di Giulio
- Department of Biological Sciences and Technologies (Di.S.Te.B.A.), University of Salento, 73100 Lecce, Italy
| | - Stefania Mariano
- Department of Biological Sciences and Technologies (Di.S.Te.B.A.), University of Salento, 73100 Lecce, Italy
| | - Elisa Panzarini
- Department of Biological Sciences and Technologies (Di.S.Te.B.A.), University of Salento, 73100 Lecce, Italy
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Pearson A, Ortiz C, Eisenbaum M, Arrate C, Browning M, Mullan M, Bachmeier C, Crawford F, Ojo JO. Deletion of PTEN in microglia ameliorates chronic neuroinflammation following repetitive mTBI. Mol Cell Neurosci 2023; 125:103855. [PMID: 37084991 DOI: 10.1016/j.mcn.2023.103855] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/25/2023] [Accepted: 04/17/2023] [Indexed: 04/23/2023] Open
Abstract
Traumatic brain injury is a leading cause of morbidity and mortality in adults and children in developed nations. Following the primary injury, microglia, the resident innate immune cells of the CNS, initiate several inflammatory signaling cascades and pathophysiological responses that may persist chronically; chronic neuroinflammation following TBI has been closely linked to the development of neurodegeneration and neurological dysfunction. Phosphoinositide 3-kinases (PI3Ks) are a family of lipid kinases that have been shown to regulate several key mechanisms in the inflammatory response to TBI. Increasing evidence has shown that the modulation of the PI3K/AKT signaling pathway has the potential to influence the cellular response to inflammatory stimuli. However, directly targeting PI3K signaling poses several challenges due to its regulatory role in several cell survival pathways. We have previously identified that the phosphatase and tensin homolog deleted on chromosome 10 (PTEN), the major negative regulator of PI3K/AKT signaling, is dysregulated following exposure to repetitive mild traumatic brain injury (r-mTBI). Moreover, this dysregulated PI3K/AKT signaling was correlated with chronic microglial-mediated neuroinflammation. Therefore, we interrogated microglial-specific PTEN as a therapeutic target in TBI by generating a microglial-specific, Tamoxifen inducible conditional PTEN knockout model using a CX3CR1 Cre recombinase mouse line PTENfl/fl/CX3CR1+/CreERT2 (mcg-PTENcKO), and exposed them to our 20-hit r-mTBI paradigm. Animals were treated with tamoxifen at 76 days post-last injury, and the effects of microglia PTEN deletion on immune-inflammatory responses were assessed at 90-days post last injury. We observed that the deletion of microglial PTEN ameliorated the proinflammatory response to repetitive brain trauma, not only reducing chronic microglial activation and proinflammatory cytokine production but also rescuing TBI-induced reactive astrogliosis, demonstrating that these effects extended beyond microglia alone. Additionally, we observed that the pharmacological inhibition of PTEN with BpV(HOpic) ameliorated the LPS-induced activation of microglial NFκB signaling in vitro. Together, these data provide support for the role of PTEN as a regulator of chronic neuroinflammation following repetitive mild TBI.
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Affiliation(s)
- Andrew Pearson
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom.
| | - Camila Ortiz
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
| | - Max Eisenbaum
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
| | - Clara Arrate
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA
| | | | - Michael Mullan
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
| | - Corbin Bachmeier
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
| | - Fiona Crawford
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom; James A. Haley Veterans' Hospital, 13000 Bruce B Downs Blvd, Tampa, FL 33612, USA
| | - Joseph O Ojo
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
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Almarghalani DA, Sha X, Mrak RE, Shah ZA. Spatiotemporal Cofilin Signaling, Microglial Activation, Neuroinflammation, and Cognitive Impairment Following Hemorrhagic Brain Injury. Cells 2023; 12:1153. [PMID: 37190062 PMCID: PMC10137307 DOI: 10.3390/cells12081153] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/06/2023] [Accepted: 04/08/2023] [Indexed: 05/17/2023] Open
Abstract
Intracerebral hemorrhage (ICH) is a significant health concern associated with high mortality. Cofilin plays a crucial role in stress conditions, but its signaling following ICH in a longitudinal study is yet to be ascertained. In the present study, we examined the cofilin expression in human ICH autopsy brains. Then, the spatiotemporal cofilin signaling, microglia activation, and neurobehavioral outcomes were investigated in a mouse model of ICH. Human autopsy brain sections from ICH patients showed increased intracellular cofilin localization within microglia in the perihematomal area, possibly associated with microglial activation and morphological changes. Various cohorts of mice were subjected to intrastriatal collagenase injection and sacrificed at time points of 1, 3, 7, 14, 21, and 28 days. Mice suffered from severe neurobehavioral deficits after ICH, lasting for 7 days, followed by a gradual improvement. Mice suffered post-stroke cognitive impairment (PSCI) both acutely and in the chronic phase. Hematoma volume increased from day 1 to 3, whereas ventricle size increased from day 21 to 28. Cofilin protein expression increased in the ipsilateral striatum on days 1 and 3 and then decreased from days 7 to 28. An increase in activated microglia was observed around the hematoma on days 1 to 7, followed by a gradual reduction up to day 28. Around the hematoma, activated microglia showed morphological changes from ramified to amoeboid. mRNA levels of inflammatory [tumor necrosis factor-α (TNF-α), interleukin 1β (IL-1β), and interleukin-6 (IL-6) and anti-inflammatory markers [interleukin-10 (IL-10), transforming growth factor-β TGF-β, and arginase I (Arg1)] increased during the acute phase and decreased in the chronic phase. Blood cofilin levels increased on day 3 and matched the increase in chemokine levels. slingshot protein phosphatase 1 (SSH1) protein, which activates cofilin, was increased from day 1 to 7. These results suggest that microglial activation might be the sequel of cofilin overactivation following ICH, leading to widespread neuroinflammation and consequent PSCI.
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Affiliation(s)
- Daniyah A. Almarghalani
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, OH 43614, USA
| | - Xiaojin Sha
- Department of Pathology, College of Medicine, The University of Toledo, Toledo, OH 43614, USA
| | - Robert E. Mrak
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA 98195, USA
| | - Zahoor A. Shah
- Department of Medicinal and Biological Chemistry, University of Toledo, Toledo, OH 43614, USA
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9
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Clarkson BDS, Grund E, David K, Johnson RK, Howe CL. ISGylation is induced in neurons by demyelination driving ISG15-dependent microglial activation. J Neuroinflammation 2022; 19:258. [PMID: 36261842 PMCID: PMC9583544 DOI: 10.1186/s12974-022-02618-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 10/07/2022] [Indexed: 11/22/2022] Open
Abstract
The causes of grey matter pathology and diffuse neuron injury in MS remain incompletely understood. Axonal stress signals arising from white matter lesions has been suggested to play a role in initiating this diffuse grey matter pathology. Therefore, to identify the most upstream transcriptional responses in neurons arising from demyelinated axons, we analyzed the transcriptome of actively translating neuronal transcripts in mouse models of demyelinating disease. Among the most upregulated genes, we identified transcripts associated with the ISGylation pathway. ISGylation refers to the covalent attachment of the ubiquitin-like molecule interferon stimulated gene (ISG) 15 to lysine residues on substrates targeted by E1 ISG15-activating enzyme, E2 ISG15-conjugating enzymes and E3 ISG15-protein ligases. We further confirmed that ISG15 expression is increased in MS cortical and deep gray matter. Upon investigating the functional impact of neuronal ISG15 upregulation, we noted that ISG15 expression was associated changes in neuronal extracellular vesicle protein and miRNA cargo. Specifically, extracellular vesicle-associated miRNAs were skewed toward increased frequency of proinflammatory and neurotoxic miRNAs and decreased frequency of anti-inflammatory and neuroprotective miRNAs. Furthermore, we found that ISG15 directly activated microglia in a CD11b-dependent manner and that microglial activation was potentiated by treatment with EVs from neurons expressing ISG15. Further study of the role of ISG15 and ISGylation in neurons in MS and neurodegenerative diseases is warranted.
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Affiliation(s)
- Benjamin D. S. Clarkson
- grid.66875.3a0000 0004 0459 167XDepartment of Neurology, Mayo Clinic, Rochester, MN 55905 USA ,grid.66875.3a0000 0004 0459 167XDepartment of Laboratory Medicine and Pathology, Mayo Clinic, Guggenheim 1521C, 200 First Street SW, Rochester, MN 55905 USA
| | - Ethan Grund
- grid.66875.3a0000 0004 0459 167XDepartment of Neurology, Mayo Clinic, Rochester, MN 55905 USA ,grid.66875.3a0000 0004 0459 167XMayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic Alix School of Medicine and Mayo Clinic Medical Scientist Training Program, MN 55905 Rochester, USA
| | - Kenneth David
- grid.418935.20000 0004 0436 053XConcordia College, Moorhead, MN USA
| | - Renee K. Johnson
- grid.66875.3a0000 0004 0459 167XDepartment of Neurology, Mayo Clinic, Rochester, MN 55905 USA
| | - Charles L. Howe
- grid.66875.3a0000 0004 0459 167XDepartment of Neurology, Mayo Clinic, Rochester, MN 55905 USA ,grid.66875.3a0000 0004 0459 167XDivision of Experimental Neurology, Mayo Clinic, Rochester, MN 55905 USA ,grid.66875.3a0000 0004 0459 167XCenter for Multiple Sclerosis and Autoimmune Neurology, Mayo Clinic, Rochester, MN 55905 USA
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10
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Monsour M, Garbuzova-Davis S, Borlongan CV. Patching Up the Permeability: The Role of Stem Cells in Lessening Neurovascular Damage in Amyotrophic Lateral Sclerosis. Stem Cells Transl Med 2022; 11:1196-1209. [PMID: 36181767 PMCID: PMC9801306 DOI: 10.1093/stcltm/szac072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 08/29/2022] [Indexed: 01/19/2023] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a debilitating disease with poor prognosis. The pathophysiology of ALS is commonly debated, with theories involving inflammation, glutamate excitotoxity, oxidative stress, mitochondria malfunction, neurofilament accumulation, inadequate nutrients or growth factors, and changes in glial support predominating. These underlying pathological mechanisms, however, act together to weaken the blood brain barrier and blood spinal cord barrier, collectively considered as the blood central nervous system barrier (BCNSB). Altering the impermeability of the BCNSB impairs the neurovascular unit, or interdependent relationship between the brain and advances the concept that ALS is has a significant neurovascular component contributing to its degenerative presentation. This unique categorization of ALS opens a variety of treatment options targeting the reestablishment of BCNSB integrity. This review will critically assess the evidence implicating the significant neurovascular components of ALS pathophysiology, while also offering an in-depth discussion regarding the use of stem cells to repair these pathological changes within the neurovascular unit.
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Affiliation(s)
- Molly Monsour
- Morsani College of Medicine, University of South Florida, Tampa, FL, USA
| | - Svitlana Garbuzova-Davis
- Center of Excellence for Aging and Brain Repair, Morsani College of Medicine, University of South Florida, Tampa, FL, USA
| | - Cesario V Borlongan
- Corresponding author: Cesar V. Borlongan, Center of Excellence for Aging and Brain Repair, University of South Florida Morsani College of Medicine, 12901 Bruce B Downs Boulevard, Tampa, FL 33612, USA.
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11
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Cao M, Liu J, Zhang X, Yang T, Wang Y, Hou Y, Song Q, Cui Y, Wang Y, Wang P. ABI3 Is a Novel Early Biomarker of Alzheimer's Disease. J Alzheimers Dis 2022; 87:335-344. [PMID: 35275543 DOI: 10.3233/jad-215635] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The Abi3 gene has been suggested to be an important regulator of microglia during Alzheimer's disease (AD), but the diagnostic power of ABI3 in neurodegenerative disease has rarely been reported. OBJECTIVE The aim of this study was to evaluate the diagnostic value of ABI3 in AD patients. METHODS ELISAs were used to measure the ABI3 level in the serum and cerebrospinal fluid (CSF) of AD patients as well as in the serum of APP/PS1 mice. RT-PCR and western blot were further performed to detect the expression levels of ABI3 in peripheral blood mononuclear cells (PBMCs) of AD subjects as well as in the hippocampus and cortical tissue of APP/PS1 mice. The correlation of cognitive ability with ABI3 level was estimated by linear regression analysis. Moreover, the diagnostic value of ABI3 for AD was assessed with ROC analysis. RESULTS The ABI3 levels all decreased significantly in the serum, CSF, and PBMCs of AD patients and showed a good diagnostic performance. In addition, the ABI3 levels were observed to decrease markedly in the hippocampus from 5-month-old mice, but the dramatic change only appeared in the cortical tissue in the 9-month-old APP/PS1 mice. The ABI3 levels in the PBMCs of AD patients and in the hippocampus of APP/PS1 mice were all positively correlated with cognitive capacity. CONCLUSION These results demonstrated that ABI3 in serum, CSF, and PBMCs could be a novel early diagnostic biomarker of AD. Moreover, ABI3 had potential to be a novel tracer marker in hippocampus of early AD.
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Affiliation(s)
- Min Cao
- Department of Clinical Laboratory, Xuanwu Hospital, Capital Medical University, Beijing, People's Republic of China.,Department of Clinical Laboratory, Beijing Huairou Hospital, Beijing, People's Republic of China
| | - Jing Liu
- Department of Clinical Laboratory, Xuanwu Hospital, Capital Medical University, Beijing, People's Republic of China
| | - Xiaomin Zhang
- Department of Clinical Laboratory, Xuanwu Hospital, Capital Medical University, Beijing, People's Republic of China
| | - Tingting Yang
- Department of Clinical Laboratory, the Hospital of Shunyi District Beijing, Beijing, People's Republic of China
| | - Yaqi Wang
- Department of Clinical Laboratory, Xuanwu Hospital, Capital Medical University, Beijing, People's Republic of China
| | - Yuli Hou
- Department of Clinical Laboratory, Xuanwu Hospital, Capital Medical University, Beijing, People's Republic of China
| | - Qiao Song
- Department of Clinical Laboratory, Xuanwu Hospital, Capital Medical University, Beijing, People's Republic of China
| | - Yuting Cui
- Department of Clinical Laboratory, Xuanwu Hospital, Capital Medical University, Beijing, People's Republic of China
| | - Yifei Wang
- Department of Laboratory Technology, Capital Medical University, Beijing, People's Republic of China
| | - Peichang Wang
- Department of Clinical Laboratory, Xuanwu Hospital, Capital Medical University, Beijing, People's Republic of China
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12
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Alonazi M, Ben Bacha A, Al Suhaibani A, Almnaizel AT, Aloudah HS, El-Ansary A. Psychobiotics improve propionic acid-induced neuroinflammation in juvenile rats, rodent model of autism. Transl Neurosci 2022; 13:292-300. [PMID: 36133749 PMCID: PMC9462542 DOI: 10.1515/tnsci-2022-0226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 06/02/2022] [Accepted: 06/02/2022] [Indexed: 11/15/2022] Open
Abstract
This study aimed to evaluate the protective and therapeutic potency of bee pollen and probiotic mixture on brain intoxication caused by propionic acid (PPA) in juvenile rats. Five groups of six animals each, were used: the control group only receiving phosphate-buffered saline; the bee pollen and probiotic-treated group receiving a combination of an equal quantity of bee pollen and probiotic (0.2 kg/kg body weight); the PPA group being treated for 3 days with an oral neurotoxic dose of PPA (0.25 kg/kg body weight); the protective and therapeutic groups receiving bee pollen and probiotic mixture treatment right before and after the neurotoxic dose of PPA, respectively. The levels of interleukin (IL)-1ß, IL-6, IL-8, IL-10, IL-12, tumor necrosis factor α, and interferon γ (IFN-γ) were investigated to evaluate the neuroinflammatory responses in brain tissues from different animal groups. The much higher IL-1β, IL-8, and IFN-γ, as pro-inflammatory cytokines (P < 0.001), together with much lower IL-10, as anti-inflammatory cytokine (P < 0.001) compared to controls clearly demonstrated the neurotoxic effects of PPA. Interestingly, the mixture of bee pollen and probiotics was effective in alleviating PPA neurotoxic effects in both therapeutic and protective groups demonstrating highly significant changes in IL-1β, IL-8, IL-10, and IFN-γ levels together with non-significant reduction in IL-6 levels compared to PPA-treated rats. Overall, our findings demonstrated a new approach to the beneficial use of psychobiotics presenting as bee pollen and probiotic combination in neuroinflammation through cytokine changes as a possible role of glial cells in gut–brain axis.
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Affiliation(s)
- Mona Alonazi
- Biochemistry Department, Science College, King Saud University, Riyadh 11495, Saudi Arabia
| | - Abir Ben Bacha
- Biochemistry Department, Science College, King Saud University, P.O Box 22452, Riyadh 11495, Saudi Arabia.,Laboratory of Plant Biotechnology Applied to Crop Improvement, Faculty of Science of Sfax, University of Sfax, Sfax, Tunisia
| | - Anwar Al Suhaibani
- Biochemistry Department, Science College, King Saud University, Riyadh 11495, Saudi Arabia
| | - Ahmad T Almnaizel
- Experimental Surgery and Animal Laboratory, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Hisham S Aloudah
- Experimental Surgery and Animal Laboratory, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Afaf El-Ansary
- Central Laboratory, King Saud University, Riyadh, Saudi Arabia
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13
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Niccolini B, Palmieri V, De Spirito M, Papi M. Opportunities Offered by Graphene Nanoparticles for MicroRNAs Delivery for Amyotrophic Lateral Sclerosis Treatment. MATERIALS (BASEL, SWITZERLAND) 2021; 15:126. [PMID: 35009270 PMCID: PMC8745865 DOI: 10.3390/ma15010126] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 06/14/2023]
Abstract
Amyotrophic lateral sclerosis (ALS) is characterized by the degeneration and death of motor neurons. This neurodegenerative disease leads to muscle atrophy, paralysis, and death due to respiratory failure. MicroRNAs (miRNAs) are small non-coding ribonucleic acids (RNAs) with a length of 19 to 25 nucleotides, participating in the regulation of gene expression. Different studies have demonstrated that miRNAs deregulation is critical for the onset of a considerable number of neurodegenerative diseases, including ALS. Some studies have underlined how miRNAs are deregulated in ALS patients and for this reason, design therapies are used to correct the aberrant expression of miRNAs. With this rationale, delivery systems can be designed to target specific miRNAs. Specifically, these systems can be derived from viral vectors (viral systems) or synthetic or natural materials, including exosomes, lipids, and polymers. Between many materials used for non-viral vectors production, the two-dimensional graphene and its derivatives represent a good alternative for efficiently delivering nucleic acids. The large surface-to-volume ratio and ability to penetrate cell membranes are among the advantages of graphene. This review focuses on the specific pathogenesis of miRNAs in ALS and on graphene delivery systems designed for gene delivery to create a primer for future studies in the field.
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Affiliation(s)
- Benedetta Niccolini
- Dipartimento di Neuroscienze, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Valentina Palmieri
- Dipartimento di Neuroscienze, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- Fondazione Policlinico Universitario "A. Gemelli" IRCSS, 00168 Rome, Italy
- Istituto dei Sistemi Complessi, CNR, Via dei Taurini 19, 00185 Rome, Italy
| | - Marco De Spirito
- Dipartimento di Neuroscienze, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- Fondazione Policlinico Universitario "A. Gemelli" IRCSS, 00168 Rome, Italy
| | - Massimiliano Papi
- Dipartimento di Neuroscienze, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- Fondazione Policlinico Universitario "A. Gemelli" IRCSS, 00168 Rome, Italy
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14
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Glial Cells as Therapeutic Approaches in Brain Ischemia-Reperfusion Injury. Cells 2021; 10:cells10071639. [PMID: 34208834 PMCID: PMC8305833 DOI: 10.3390/cells10071639] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 06/24/2021] [Accepted: 06/26/2021] [Indexed: 02/07/2023] Open
Abstract
Ischemic stroke is the second cause of mortality and the first cause of long-term disability constituting a serious socioeconomic burden worldwide. Approved treatments include thrombectomy and rtPA intravenous administration, which, despite their efficacy in some cases, are not suitable for a great proportion of patients. Glial cell-related therapies are progressively overcoming inefficient neuron-centered approaches in the preclinical phase. Exploiting the ability of microglia to naturally switch between detrimental and protective phenotypes represents a promising therapeutic treatment, in a similar way to what happens with astrocytes. However, the duality present in many of the roles of these cells upon ischemia poses a notorious difficulty in disentangling the precise pathways to target. Still, promoting M2/A2 microglia/astrocyte protective phenotypes and inhibiting M1/A1 neurotoxic profiles is globally rendering promising results in different in vivo models of stroke. On the other hand, described oligodendrogenesis after brain ischemia seems to be strictly beneficial, although these cells are the less studied players in the stroke paradigm and negative effects could be described for oligodendrocytes in the next years. Here, we review recent advances in understanding the precise role of mentioned glial cell types in the main pathological events of ischemic stroke, including inflammation, blood brain barrier integrity, excitotoxicity, reactive oxygen species management, metabolic support, and neurogenesis, among others, with a special attention to tested therapeutic approaches.
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15
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Xu JJ, Guo S, Xue R, Xiao L, Kou JN, Liu YQ, Han JY, Fu JJ, Wei N. Adalimumab ameliorates memory impairments and neuroinflammation in chronic cerebral hypoperfusion rats. Aging (Albany NY) 2021; 13:14001-14014. [PMID: 34030135 PMCID: PMC8202885 DOI: 10.18632/aging.203009] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 04/05/2021] [Indexed: 01/31/2023]
Abstract
Vascular dementia (VaD) is the second most common type of dementia worldwide. Although there are five FDA-approved drugs for the treatment of Alzheimer's disease (AD), none of them have been applied to treat VaD. Adalimumab is a TNF-α inhibitor that is used for the treatment of autoimmune diseases such as rheumatoid arthritis. In a recent retrospective case-control study, the application of adalimumab for rheumatoid or psoriasis was shown to decrease the risk of AD. However, whether adalimumab can be used for the treatment of VaD is not clear. In this study, we used 2VO surgery to generate a VaD rat model and treated the rats with adalimumab or vehicle. We demonstrated that VaD rats treated with adalimumab exhibited significant improvements in memory. In addition, adalimumab treatment significantly alleviated neuronal loss in the hippocampi of VaD rats. Moreover, adalimumab significantly reduced microglial activation and reversed M1/M2 polarization in VaD rats. Furthermore, adalimumab treatment suppressed the activity of NF-κB, an important neuroinflammatory transcription factor. Finally, adalimumab displayed a protective role against oxidative stress in VaD rats. Our results indicate that adalimumab may be applied for the treatment of human patients with VaD.
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Affiliation(s)
- Jing-Jing Xu
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, People’s Republic of China
- Henan Key Laboratory of Tumor Pathology, Zhengzhou 450002, People’s Republic of China
- Department of Pathology, School of Basic Medicine, Zhengzhou University, Zhengzhou 450002, People’s Republic of China
| | - Si Guo
- Department of Medical Laboratory, Henan Provincial People’s Hospital, Zhengzhou, Henan 450003, People’s Republic of China
- Department of Medical Laboratory of Central China Fuwai Hospital, Zhengzhou, Henan 450003, People’s Republic of China
- Central China Fuwai Hospital of Zhengzhou University, Zhengzhou, Henan 450003, People’s Republic of China
| | - Rui Xue
- Medical Research Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, People’s Republic of China
| | - Lin Xiao
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, People’s Republic of China
- Henan Key Laboratory of Tumor Pathology, Zhengzhou 450002, People’s Republic of China
- Department of Pathology, School of Basic Medicine, Zhengzhou University, Zhengzhou 450002, People’s Republic of China
| | - Jun-Na Kou
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, People’s Republic of China
- Henan Key Laboratory of Tumor Pathology, Zhengzhou 450002, People’s Republic of China
- Department of Pathology, School of Basic Medicine, Zhengzhou University, Zhengzhou 450002, People’s Republic of China
| | - Yu-Qiong Liu
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, People’s Republic of China
- Henan Key Laboratory of Tumor Pathology, Zhengzhou 450002, People’s Republic of China
- Department of Pathology, School of Basic Medicine, Zhengzhou University, Zhengzhou 450002, People’s Republic of China
| | - Jun-Ya Han
- Department of Pathology, People’s Hospital of Zhengzhou, Zhengzhou 450000, People’s Republic of China
| | - Jing-Jie Fu
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, People’s Republic of China
| | - Na Wei
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, People’s Republic of China
- Henan Key Laboratory of Tumor Pathology, Zhengzhou 450002, People’s Republic of China
- Department of Pathology, School of Basic Medicine, Zhengzhou University, Zhengzhou 450002, People’s Republic of China
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16
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Lian L, Zhang Y, Liu L, Yang L, Cai Y, Zhang J, Xu S. Neuroinflammation in Ischemic Stroke: Focus on MicroRNA-mediated Polarization of Microglia. Front Mol Neurosci 2021; 13:612439. [PMID: 33488360 PMCID: PMC7817943 DOI: 10.3389/fnmol.2020.612439] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/30/2020] [Indexed: 12/19/2022] Open
Abstract
Ischemic stroke is one of the most common causes of death and disability worldwide. Neuroinflammation is a major pathological event involved in the process of ischemic injury and repair. In particular, microglia play a dual role in neuroinflammation. During the acute phase of stroke onset, M2 microglia are the dominant phenotype and exert protective effects on neuronal cells, whereas permanent M1 microglia contribute to prolonged inflammation and are detrimental to brain tissue. Emerging evidence indicates that microRNAs (miRNAs) may have regulatory effects on microglia-associated inflammation. Thus, we briefly reviewed the dynamic response of microglia after a stroke and assessed how specific miRNAs affect the behavior of reactive microglia. We concluded that miRNAs may be useful novel therapeutic targets to improve stroke outcomes and modulate neuroinflammation.
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Affiliation(s)
- Lu Lian
- Medical Experiment Center, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.,Tianjin Key Laboratory of Translational Research of TCM Prescription and Syndrome, Tianjin, China.,Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yunsha Zhang
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Lu Liu
- Binhai New Area Hospital of TCM. Tian Jin, Fourth Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Liji Yang
- Medical Experiment Center, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.,Tianjin Key Laboratory of Translational Research of TCM Prescription and Syndrome, Tianjin, China.,Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yichen Cai
- Medical Experiment Center, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.,Tianjin Key Laboratory of Translational Research of TCM Prescription and Syndrome, Tianjin, China.,Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Junping Zhang
- Medical Experiment Center, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.,Tianjin Key Laboratory of Translational Research of TCM Prescription and Syndrome, Tianjin, China
| | - Shixin Xu
- Medical Experiment Center, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.,Tianjin Key Laboratory of Translational Research of TCM Prescription and Syndrome, Tianjin, China
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17
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Eyileten C, Sharif L, Wicik Z, Jakubik D, Jarosz-Popek J, Soplinska A, Postula M, Czlonkowska A, Kaplon-Cieslicka A, Mirowska-Guzel D. The Relation of the Brain-Derived Neurotrophic Factor with MicroRNAs in Neurodegenerative Diseases and Ischemic Stroke. Mol Neurobiol 2021; 58:329-347. [PMID: 32944919 PMCID: PMC7695657 DOI: 10.1007/s12035-020-02101-2] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 08/25/2020] [Indexed: 03/07/2023]
Abstract
Brain-derived neurotrophic factor (BDNF) is a member of the neurotrophin family of growth factors that plays a crucial role in the development of the nervous system while supporting the survival of existing neurons and instigating neurogenesis. Altered levels of BDNF, both in the circulation and in the central nervous system (CNS), have been reported to be involved in the pathogenesis of neurodegenerative diseases, including Alzheimer's disease (AD), Parkinson's disease (PD), amyotrophic lateral sclerosis (ALS), Huntington's disease (HD), multiple sclerosis (MS), and ischemic stroke. MicroRNAs (miRNAs) are a class of non-coding RNAs found in body fluids such as peripheral blood and cerebrospinal fluid. Several different miRNAs, and their target genes, are recognized to be involved in the pathophysiology of neurodegenerative and neurovascular diseases. Thus, they present as promising biomarkers and a novel treatment approach for CNS disorders. Currently, limited studies provide viable evidence of miRNA-mediated post-transcriptional regulation of BDNF. The aim of this review is to provide a comprehensive assessment of the current knowledge regarding the potential diagnostic and prognostic values of miRNAs affecting BDNF expression and its role as a CNS disorders and neurovascular disease biomarker. Moreover, a novel therapeutic approach in neurodegenerative diseases and ischemic stroke targeting miRNAs associated with BDNF will be discussed.
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Affiliation(s)
- Ceren Eyileten
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Center for Preclinical Research and Technology CEPT, Banacha 1B Str., 02-097 Warsaw, Poland
| | - Lucia Sharif
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Center for Preclinical Research and Technology CEPT, Banacha 1B Str., 02-097 Warsaw, Poland
| | - Zofia Wicik
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Center for Preclinical Research and Technology CEPT, Banacha 1B Str., 02-097 Warsaw, Poland
- Centro de Matemática, Computação e Cognição, Universidade Federal do ABC, São Paulo, Brazil
| | - Daniel Jakubik
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Center for Preclinical Research and Technology CEPT, Banacha 1B Str., 02-097 Warsaw, Poland
| | - Joanna Jarosz-Popek
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Center for Preclinical Research and Technology CEPT, Banacha 1B Str., 02-097 Warsaw, Poland
| | - Aleksandra Soplinska
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Center for Preclinical Research and Technology CEPT, Banacha 1B Str., 02-097 Warsaw, Poland
| | - Marek Postula
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Center for Preclinical Research and Technology CEPT, Banacha 1B Str., 02-097 Warsaw, Poland
| | - Anna Czlonkowska
- 2nd Department of Neurology, Institute of Psychiatry and Neurology, 02-957 Warsaw, Poland
| | | | - Dagmara Mirowska-Guzel
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Center for Preclinical Research and Technology CEPT, Banacha 1B Str., 02-097 Warsaw, Poland
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18
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Dissection of P2X4 and P2X7 Receptor Current Components in BV-2 Microglia. Int J Mol Sci 2020; 21:ijms21228489. [PMID: 33187309 PMCID: PMC7696836 DOI: 10.3390/ijms21228489] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/09/2020] [Accepted: 11/09/2020] [Indexed: 12/21/2022] Open
Abstract
Microglia cells represent the immune system of the central nervous system. They become activated by ATP released from damaged and inflamed tissue via purinergic receptors. Ionotropic purinergic P2X4 and P2X7 receptors have been shown to be involved in neurological inflammation and pain sensation. Whether the two receptors assemble exclusively as homotrimers or also as heterotrimers is still a matter of debate. We investigated the expression of P2X receptors in BV-2 microglia cells applying the whole-cell voltage-clamp technique. We dissected P2X4 and P2X7 receptor-mediated current components by using specific P2X4 and P2X7 receptor blockers and by their characteristic current kinetics. We found that P2X4 and P2X7 receptors are activated independently from each other, indicating that P2X4/P2X7 heteromers are not of functional significance in these cells. The pro-inflammatory mediators lipopolysaccharide and interferon γ, if applied in combination, upregulated P2X4, but not P2X7 receptor-dependent current components also arguing against phenotypically relevant heteromerization of P2X4 and P2X7 receptor subunits.
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19
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Ruiz-Ruiz C, García-Magro N, Negredo P, Avendaño C, Bhattacharya A, Ceusters M, García AG. Chronic administration of P2X7 receptor antagonist JNJ-47965567 delays disease onset and progression, and improves motor performance in ALS SOD1 G93A female mice. Dis Model Mech 2020; 13:13/10/dmm045732. [PMID: 33174532 PMCID: PMC7648608 DOI: 10.1242/dmm.045732] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 09/03/2020] [Indexed: 12/12/2022] Open
Abstract
Neuroinflammation is one of the main physiopathological mechanisms of amyotrophic lateral sclerosis (ALS), produced by the chronic activation of microglia in the CNS. This process is triggered by the persistent activation of the ATP-gated P2X7 receptor (P2RX7, hereafter referred to as P2X7R). The present study aimed to evaluate the effects of the chronic treatment with the P2X7R antagonist JNJ-47965567 in the development and progression of ALS in the SOD1G93A murine model. SOD1G93A mice were intraperitoneally (i.p.) injected with either 30 mg/kg of JNJ-47965567 or vehicle 4 times per week, from pre-onset age (here, postnatal day 60; P60) until study endpoint. Body weight, motor coordination, phenotypic score, disease onset and survival were measured throughout the study, and compared between vehicle- and drug-injected groups. Treatment with the P2X7R antagonist JNJ-47965567 delayed disease onset, reduced body weight loss and improved motor coordination and phenotypic score in female SOD1G93A mice, although it did not increase lifespan. Interestingly, neither beneficial nor detrimental effects were observed in males in any of the analyzed parameters. Treatment did not affect motor neuron survival or ChAT, Iba-1 and P2X7R protein expression in endpoint individuals of mixed sexes. Overall, chronic administration of JNJ-47965567 for 4 times per week to SOD1G93A mice from pre-onset stage altered disease progression in female individuals while it did not have any effect in males. Our results suggest a partial, yet important, effect of P2X7R in the development and progression of ALS.
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Affiliation(s)
- Cristina Ruiz-Ruiz
- Instituto Teófilo Hernando, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid 28029, Spain.,Departamento de Farmacología, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid 28029, Spain
| | - Nuria García-Magro
- Departamento de Anatomía, Histología y Neurociencia, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid 28029, Spain
| | - Pilar Negredo
- Departamento de Anatomía, Histología y Neurociencia, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid 28029, Spain
| | - Carlos Avendaño
- Departamento de Anatomía, Histología y Neurociencia, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid 28029, Spain
| | - Anindya Bhattacharya
- Neuroscience Therapeutic Area, Janssen Research and Development LLC., 3210 Merryfield Row, San Diego, CA 92121, USA
| | - Marc Ceusters
- Neuroscience Therapeutic Area, Janssen Research and Development, a Division of Janssen Pharmaceutica NV, Beerse B-2340, Belgium
| | - Antonio G García
- Instituto Teófilo Hernando, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid 28029, Spain .,Departamento de Farmacología, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid 28029, Spain.,Instituto de Investigación Sanitaria, Hospital Universitario de La Princesa, Madrid 28006, Spain
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20
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Gamage R, Wagnon I, Rossetti I, Childs R, Niedermayer G, Chesworth R, Gyengesi E. Cholinergic Modulation of Glial Function During Aging and Chronic Neuroinflammation. Front Cell Neurosci 2020; 14:577912. [PMID: 33192323 PMCID: PMC7594524 DOI: 10.3389/fncel.2020.577912] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 09/07/2020] [Indexed: 12/12/2022] Open
Abstract
Aging is a complex biological process that increases the risk of age-related cognitive degenerative diseases such as dementia, including Alzheimer’s disease (AD), Lewy Body Dementia (LBD), and mild cognitive impairment (MCI). Even non-pathological aging of the brain can involve chronic oxidative and inflammatory stress, which disrupts the communication and balance between the brain and the immune system. There has been an increasingly strong connection found between chronic neuroinflammation and impaired memory, especially in AD. While microglia and astrocytes, the resident immune cells of the central nervous system (CNS), exerting beneficial effects during the acute inflammatory phase, during chronic neuroinflammation they can become more detrimental. Central cholinergic circuits are involved in maintaining normal cognitive function and regulating signaling within the entire cerebral cortex. While neuronal-glial cholinergic signaling is anti-inflammatory and anti-oxidative, central cholinergic neuronal degeneration is implicated in impaired learning, memory sleep regulation, and attention. Although there is evidence of cholinergic involvement in memory, fewer studies have linked the cholinergic anti-inflammatory and anti-oxidant pathways to memory processes during development, normal aging, and disease states. This review will summarize the current knowledge of cholinergic effects on microglia and astroglia, and their role in both anti-inflammatory and anti-oxidant mechanisms, concerning normal aging and chronic neuroinflammation. We provided details on how stimulation of α7 nicotinic acetylcholine (α7nACh) receptors can be neuroprotective by increasing amyloid-β phagocytosis, decreasing inflammation and reducing oxidative stress by promoting the nuclear factor erythroid 2-related factor 2 (Nrf2) pathways and decreasing the release of pro-inflammatory cytokines. There is also evidence for astroglial α7nACh receptor stimulation mediating anti-inflammatory and antioxidant effects by inhibiting the nuclear factor-κB (NF-κB) pathway and activating the Nrf2 pathway respectively. We conclude that targeting cholinergic glial interactions between neurons and glial cells via α7nACh receptors could regulate neuroinflammation and oxidative stress, relevant to the treatment of several neurodegenerative diseases.
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Affiliation(s)
- Rashmi Gamage
- Department of Pharmacology, School of Medicine, Western Sydney University, Penrith, NSW, Australia
| | - Ingrid Wagnon
- Department of Pharmacology, School of Medicine, Western Sydney University, Penrith, NSW, Australia
| | - Ilaria Rossetti
- Department of Pharmacology, School of Medicine, Western Sydney University, Penrith, NSW, Australia
| | - Ryan Childs
- Department of Pharmacology, School of Medicine, Western Sydney University, Penrith, NSW, Australia
| | - Garry Niedermayer
- School of Science, Western Sydney University, Penrith, NSW, Australia
| | - Rose Chesworth
- School of Medicine, Western Sydney University, Penrith, NSW, Australia
| | - Erika Gyengesi
- Department of Pharmacology, School of Medicine, Western Sydney University, Penrith, NSW, Australia
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21
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Wang L, Zhang L. MicroRNAs in amyotrophic lateral sclerosis: from pathogenetic involvement to diagnostic biomarker and therapeutic agent development. Neurol Sci 2020; 41:3569-3577. [PMID: 33006054 DOI: 10.1007/s10072-020-04773-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 09/25/2020] [Indexed: 12/11/2022]
Abstract
MicroRNAs (miRNAs) are a class of endogenous non-coding small single-stranded RNAs that are 21-25 nucleotides (NTs) in length and participate in post-transcriptional gene regulation. Studies have shown that miRNA dysfunction plays a critical role in the occurrence and development of a variety of nervous system diseases, including neurodegenerative diseases. Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease with an unclear etiology and is characterized by the selective invasion of motor neurons in the brain and spinal cord. Symptoms can range from mild spasms in the limbs or medulla oblongata muscles to paralysis in almost all skeletal muscles. The role of miRNAs in the pathogenesis, diagnosis, and treatment of ALS has become of greater importance to those studying ALS. In this review, we reviewed experimentally confirmed miRNAs shown to be involved in the pathogenesis of ALS and that are used as diagnostic biomarkers or therapeutic ALS agents. At present, there are at least 20-30 genes clearly related to the pathogenesis of ALS. Multiple miRNAs have been reported in different pathogenic gene models. MiRNAs could be used as biomarkers for the diagnosis of ALS; the differential expression of some miRNAs could be related to ALS prognosis. As therapeutic agents, miRNAs are still in the exploratory stage. Although encouraging results have been achieved using animal models, much research is still needed before clinical trials can ensue. However, with additional miRNA studies in ALS patients and animal models, the pathogenesis, early diagnosis, and therapy of ALS should be elucidated.
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Affiliation(s)
- Lin Wang
- Department of Emergency Medicine, Shengjing Hospital of China Medical University, Liaoning, Shenyang, People's Republic of China
| | - Lijuan Zhang
- Departments of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Heping District, Shenyang, Liaoning, 110004, People's Republic of China.
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22
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Tang S, Jing H, Song F, Huang H, Li W, Xie G, Zhou J. MicroRNAs in the Spinal Microglia Serve Critical Roles in Neuropathic Pain. Mol Neurobiol 2020; 58:132-142. [PMID: 32902792 DOI: 10.1007/s12035-020-02102-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 08/26/2020] [Indexed: 02/06/2023]
Abstract
Neuropathic pain (NP) can occur after peripheral nerve injury (PNI), and it can be converted into a maladaptive, detrimental phenotype that causes a long-term state of pain hypersensitivity. In the last decade, the discovery that dysfunctional microglia evoke pain, called "microgliopathic pain," has challenged traditional neuronal views of "pain" and has been extensively explored. Recent studies have shown that microRNAs (miRNAs) can act as activators or inhibitors of spinal microglia in NP conditions. We first briefly review spinal microglial activation in NP. We then comprehensively describe miRNA expression changes and their potential mechanisms in the response of microglia to nerve injury. We summarize the roles of the following two representative miRNAs: miR-124, which reverses NP by keeping microglia quiescent, and miR-155, which promotes NP following microglial activation. Finally, we focused on the therapeutic potential of microglial miRNAs in NP. The findings we summarized may be essential tools for basic research and clinical treatment of NP.
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Affiliation(s)
- Simin Tang
- Department of Anesthesiology, The First People's Hospital of Foshan, Foshan, 528000, Guangdong Province, People's Republic of China
- Sun Yat-sen University, Guangzhou, 510000, Guangdong Province, People's Republic of China
| | - Huan Jing
- Department of Anesthesiology, The First People's Hospital of Foshan, Foshan, 528000, Guangdong Province, People's Republic of China
- ZunYi Medical University, ZunYi, 563100, Guizhou Province, People's Republic of China
| | - Fuhu Song
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510000, Guangdong Province, People's Republic of China
| | - Haicheng Huang
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510000, Guangdong Province, People's Republic of China
| | - Wenjun Li
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510000, Guangdong Province, People's Republic of China
| | - Guiling Xie
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510000, Guangdong Province, People's Republic of China
| | - Jun Zhou
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510000, Guangdong Province, People's Republic of China.
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23
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P2X7 Receptors Amplify CNS Damage in Neurodegenerative Diseases. Int J Mol Sci 2020; 21:ijms21175996. [PMID: 32825423 PMCID: PMC7504621 DOI: 10.3390/ijms21175996] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/07/2020] [Accepted: 08/17/2020] [Indexed: 12/11/2022] Open
Abstract
ATP is a (co)transmitter and signaling molecule in the CNS. It acts at a multitude of ligand-gated cationic channels termed P2X to induce rapid depolarization of the cell membrane. Within this receptor-channel family, the P2X7 receptor (R) allows the transmembrane fluxes of Na+, Ca2+, and K+, but also allows the slow permeation of larger organic molecules. This is supposed to cause necrosis by excessive Ca2+ influx, as well as depletion of intracellular ions and metabolites. Cell death may also occur by apoptosis due to the activation of the caspase enzymatic cascade. Because P2X7Rs are localized in the CNS preferentially on microglia, but also at a lower density on neuroglia (astrocytes, oligodendrocytes) the stimulation of this receptor leads to the release of neurodegeneration-inducing bioactive molecules such as pro-inflammatory cytokines, chemokines, proteases, reactive oxygen and nitrogen molecules, and the excitotoxic glutamate/ATP. Various neurodegenerative reactions of the brain/spinal cord following acute harmful events (mechanical CNS damage, ischemia, status epilepticus) or chronic neurodegenerative diseases (neuropathic pain, Alzheimer’s disease, Parkinson’s disease, multiple sclerosis, amyotrophic lateral sclerosis) lead to a massive release of ATP via the leaky plasma membrane of neural tissue. This causes cellular damage superimposed on the original consequences of neurodegeneration. Hence, blood-brain-barrier permeable pharmacological antagonists of P2X7Rs with excellent bioavailability are possible therapeutic agents for these diseases. The aim of this review article is to summarize our present state of knowledge on the involvement of P2X7R-mediated events in neurodegenerative illnesses endangering especially the life quality and duration of the aged human population.
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Improta-Caria AC, Nonaka CKV, Cavalcante BRR, De Sousa RAL, Aras Júnior R, Souza BSDF. Modulation of MicroRNAs as a Potential Molecular Mechanism Involved in the Beneficial Actions of Physical Exercise in Alzheimer Disease. Int J Mol Sci 2020; 21:E4977. [PMID: 32674523 PMCID: PMC7403962 DOI: 10.3390/ijms21144977] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/23/2020] [Accepted: 06/23/2020] [Indexed: 12/18/2022] Open
Abstract
Alzheimer disease (AD) is one of the most common neurodegenerative diseases, affecting middle-aged and elderly individuals worldwide. AD pathophysiology involves the accumulation of beta-amyloid plaques and neurofibrillary tangles in the brain, along with chronic neuroinflammation and neurodegeneration. Physical exercise (PE) is a beneficial non-pharmacological strategy and has been described as an ally to combat cognitive decline in individuals with AD. However, the molecular mechanisms that govern the beneficial adaptations induced by PE in AD are not fully elucidated. MicroRNAs are small non-coding RNAs involved in the post-transcriptional regulation of gene expression, inhibiting or degrading their target mRNAs. MicroRNAs are involved in physiological processes that govern normal brain function and deregulated microRNA profiles are associated with the development and progression of AD. It is also known that PE changes microRNA expression profile in the circulation and in target tissues and organs. Thus, this review aimed to identify the role of deregulated microRNAs in the pathophysiology of AD and explore the possible role of the modulation of microRNAs as a molecular mechanism involved in the beneficial actions of PE in AD.
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Affiliation(s)
- Alex Cleber Improta-Caria
- Post-Graduate Program in Medicine and Health, Faculty of Medicine, Federal University of Bahia, Bahia 40110-909, Brazil; (A.C.I.-C.); (R.A.J.)
- University Hospital Professor Edgard Santos, Bahia 40110-909, Brazil
- Center for Biotechnology and Cell Therapy, São Rafael Hospital, Bahia 40110-909, Brazil; (C.K.V.N.); (B.R.R.C.)
| | - Carolina Kymie Vasques Nonaka
- Center for Biotechnology and Cell Therapy, São Rafael Hospital, Bahia 40110-909, Brazil; (C.K.V.N.); (B.R.R.C.)
- D’Or Institute for Research and Education (IDOR), Rio de Janeiro 20000-000, Brazil
| | - Bruno Raphael Ribeiro Cavalcante
- Center for Biotechnology and Cell Therapy, São Rafael Hospital, Bahia 40110-909, Brazil; (C.K.V.N.); (B.R.R.C.)
- D’Or Institute for Research and Education (IDOR), Rio de Janeiro 20000-000, Brazil
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Bahia 40110-909, Brazil
| | - Ricardo Augusto Leoni De Sousa
- Physiological Science Multicentric Program, Federal University of Valleys´ Jequitinhonha and Mucuri, Minas Gerais 30000-000, Brazil;
| | - Roque Aras Júnior
- Post-Graduate Program in Medicine and Health, Faculty of Medicine, Federal University of Bahia, Bahia 40110-909, Brazil; (A.C.I.-C.); (R.A.J.)
- University Hospital Professor Edgard Santos, Bahia 40110-909, Brazil
| | - Bruno Solano de Freitas Souza
- Center for Biotechnology and Cell Therapy, São Rafael Hospital, Bahia 40110-909, Brazil; (C.K.V.N.); (B.R.R.C.)
- D’Or Institute for Research and Education (IDOR), Rio de Janeiro 20000-000, Brazil
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Bahia 40110-909, Brazil
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25
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Chen M, Zhao QY, Edson J, Zhang ZH, Li X, Wei W, Bredy T, Reutens DC. Genome-wide microRNA profiling in brain and blood samples in a mouse model of epileptogenesis. Epilepsy Res 2020; 166:106400. [PMID: 32590288 DOI: 10.1016/j.eplepsyres.2020.106400] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 04/21/2020] [Accepted: 06/14/2020] [Indexed: 01/20/2023]
Abstract
OBJECTIVES This study profiled circulating and hippocampal microRNAs (miRNAs) to identify alterations associated with the risk of epileptogenesis in a mouse temporal lobe epilepsy model. METHODS Next-generation sequencing was performed to examine the changes in miRNA expression 24 h after pilocarpine-induced status epilepticus (SE) in C57BL/6NCrl mice using both blood and hippocampus samples. Differentially expressed miRNAs were identified from SE animals and matched controls that failed to develop SE after receiving equal doses of pilocarpine (NS animals). Blood and brain miRNA profiles were then compared to identify circulating miRNA alterations reflecting the changes in the brain. RESULTS We identified 3 miRNAs that were significantly up-regulated and 4 miRNAs that were significantly down-regulated in the blood of SE animals compared with NS animals. When hippocampal miRNAs of SE animals and NS animals were compared, 5 miRNAs were up-regulated and 4 were down-regulated. Of these, miR-434-3p and miR-133a-3p were observed to have greatest changes in both blood and brain of SE animals. SIGNIFICANCE This study extends current knowledge of changes in miRNAs associated with epileptogenesis by profiling miRNAs in SE and NS animals in an experimental temporal lobe epilepsy model. The study was designed to allow non-specific changes due to the activation of muscarinic cholinergic receptors in peripheral organs by pilocarpine to be ruled out. Significantly altered circulating miRNAs that reflect changes in the brain during epileptogenesis after SE have the potential to be developed as prognostic biomarkers for epileptogenesis.
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Affiliation(s)
- Min Chen
- Centre for Advanced Imaging, The University of Queensland, Brisbane, 4072, Australia
| | - Qiong-Yi Zhao
- Queensland Brain Institute, The University of Queensland, Brisbane, 4072, Australia
| | - Janette Edson
- Queensland Brain Institute, The University of Queensland, Brisbane, 4072, Australia
| | - Zong Hong Zhang
- Queensland Brain Institute, The University of Queensland, Brisbane, 4072, Australia
| | - Xiang Li
- Queensland Brain Institute, The University of Queensland, Brisbane, 4072, Australia; Neuroepigenetic Research Lab, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China; Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
| | - Wei Wei
- Queensland Brain Institute, The University of Queensland, Brisbane, 4072, Australia
| | - Timothy Bredy
- Queensland Brain Institute, The University of Queensland, Brisbane, 4072, Australia
| | - David C Reutens
- Centre for Advanced Imaging, The University of Queensland, Brisbane, 4072, Australia.
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26
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Christoforidou E, Joilin G, Hafezparast M. Potential of activated microglia as a source of dysregulated extracellular microRNAs contributing to neurodegeneration in amyotrophic lateral sclerosis. J Neuroinflammation 2020; 17:135. [PMID: 32345319 PMCID: PMC7187511 DOI: 10.1186/s12974-020-01822-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 04/21/2020] [Indexed: 02/07/2023] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is the most common form of motor neuron degeneration in adults, and several mechanisms underlying the disease pathology have been proposed. It has been shown that glia communicate with other cells by releasing extracellular vesicles containing proteins and nucleic acids, including microRNAs (miRNAs), which play a role in the post-transcriptional regulation of gene expression. Dysregulation of miRNAs is commonly observed in ALS patients, together with inflammation and an altered microglial phenotype. However, the role of miRNA-containing vesicles in microglia-to-neuron communication in the context of ALS has not been explored in depth. This review summarises the evidence for the presence of inflammation, pro-inflammatory microglia and dysregulated miRNAs in ALS, then explores how microglia may potentially be responsible for this miRNA dysregulation. The possibility of pro-inflammatory ALS microglia releasing miRNAs which may then enter neuronal cells to contribute to degeneration is also explored. Based on the literature reviewed here, microglia are a likely source of dysregulated miRNAs and potential mediators of neurodegenerative processes. Therefore, dysregulated miRNAs may be promising candidates for the development of therapeutic strategies.
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Affiliation(s)
| | - Greig Joilin
- School of Life Sciences, University of Sussex, Falmer, Brighton, BN1 9QG, UK
| | - Majid Hafezparast
- School of Life Sciences, University of Sussex, Falmer, Brighton, BN1 9QG, UK.
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27
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Hippocampal sub-regional differences in the microRNA response to forebrain ischemia. Mol Cell Neurosci 2019; 98:164-178. [DOI: 10.1016/j.mcn.2019.05.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 05/16/2019] [Accepted: 05/20/2019] [Indexed: 12/17/2022] Open
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28
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Jakovljevic M, Lavrnja I, Bozic I, Milosevic A, Bjelobaba I, Savic D, Sévigny J, Pekovic S, Nedeljkovic N, Laketa D. Induction of NTPDase1/CD39 by Reactive Microglia and Macrophages Is Associated With the Functional State During EAE. Front Neurosci 2019; 13:410. [PMID: 31105520 PMCID: PMC6498900 DOI: 10.3389/fnins.2019.00410] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 04/10/2019] [Indexed: 11/23/2022] Open
Abstract
Purinergic signaling is critically involved in neuroinflammation associated with multiple sclerosis (MS) and its major inflammatory animal model, experimental autoimmune encephalomyelitis (EAE). Herein, we explored the expression of ectonucleoside triphosphate diphosphohydrolase1 (NTPDase1/CD39) in the spinal cord, at the onset (Eo), peak (Ep), and end (Ee) of EAE. Several-fold increase in mRNA and in NTPDase1 protein levels were observed at Eo and Ep. In situ hybridization combined with fluorescent immunohistochemistry showed that reactive microglia and infiltrated mononuclear cells mostly accounted for the observed increase. Colocalization analysis revealed that up to 80% of Iba1 immunoreactivity and ∼50% of CD68 immunoreactivity was colocalized with NTPDase1, while flow cytometric analysis revealed that ∼70% of mononuclear infiltrates were NTPDase1+ at Ep. Given the main role of NTPDase1 to degrade proinflammatory ATP, we hypothesized that the observed up-regulation of NTPDase1 may be associated with the transition between proinflammatory M1-like to neuroprotective M2-like phenotype of microglia/macrophages during EAE. Functional phenotype of reactive microglia/macrophages that overexpress NTPDase1 was assessed by multi-image colocalization analysis using iNOS and Arg1 as selective markers for M1 and M2 reactive states, respectively. At the peak of EAE NTPDase1 immunoreactivity showed much higher co-occurrence with Arg1 immunoreactivity in microglia and macrophages, compared to iNOS, implying its stronger association with M2-like reactive phenotype. Additionally, in ∼80% of CD68 positive cells NTPDase1 was coexpressed with Arg1 compared to negligible fraction coexpresing iNOS and ∼15% coexpresing both markers, additionally indicating prevalent association of NTPDase1 with M2-like microglial/macrophages phenotype at Ep. Together, our data suggest an association between NTPDase1 up-regulation by reactive microglia and infiltrated macrophages and their transition toward antiinflammatory phenotype in EAE.
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Affiliation(s)
- Marija Jakovljevic
- Department of Neurobiology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Belgrade, Serbia
| | - Irena Lavrnja
- Department of Neurobiology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Belgrade, Serbia
| | - Iva Bozic
- Department of Neurobiology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Belgrade, Serbia
| | - Ana Milosevic
- Department of Neurobiology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Belgrade, Serbia
| | - Ivana Bjelobaba
- Department of Neurobiology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Belgrade, Serbia
| | - Danijela Savic
- Department of Neurobiology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Belgrade, Serbia
| | - Jean Sévigny
- Département de Microbiologie-Infectiologie et d'Immunologie, Faculté de Médecine, Université Laval, Quebec City, QC, Canada.,Centre de Recherche du CHU de Québec, Université Laval, Quebec City, QC, Canada
| | - Sanja Pekovic
- Department of Neurobiology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Belgrade, Serbia
| | - Nadezda Nedeljkovic
- Department for General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Danijela Laketa
- Department for General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Belgrade, Serbia
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29
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Functional microglia neurotransmitters in amyotrophic lateral sclerosis. Semin Cell Dev Biol 2019; 94:121-128. [PMID: 31009755 DOI: 10.1016/j.semcdb.2019.04.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 04/18/2019] [Accepted: 04/18/2019] [Indexed: 12/13/2022]
Abstract
Today neuroscience is dominated by the perspective that microglia are essential elements in any integrated view of the nervous system. A number of different neuroinflammatory conditions affect the CNS where microglia involvement, and particularly microgliosis, is not only a prominent feature, but also a pathogenic key mechanism of disease. On the other side, microglia can also constitute an important trigger of neuronal protection during neurodegenerative disorders. For instance in ALS and other motor neuron diseases, available evidence suggests the coexistence of quite different roles for microglia, characterized by neuroprotective functions at early stages, and neurotoxic actions during disease progression. The scope of this review is a brief discussion about microglia being activated and functioning during ALS, and particularly about neurotransmitters participating to the pathological signature of ALS microglia. We will discuss that ALS microglia can express a variety of classical neurotransmitter receptors comprising those for extracellular ATP, glutamate and histamine. We will review data indicating that the modulation of these transmitter receptors may induce beneficial effects in ALS models, so that the protective properties of microglia can be emphasized at the expenses of their toxicity.
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30
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Li HY, Huang M, Luo QY, Hong X, Ramakrishna S, So KF. Lycium barbarum (Wolfberry) Increases Retinal Ganglion Cell Survival and Affects both Microglia/Macrophage Polarization and Autophagy after Rat Partial Optic Nerve Transection. Cell Transplant 2019; 28:607-618. [PMID: 30838886 PMCID: PMC7103598 DOI: 10.1177/0963689719835181] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The rat partial optic nerve transection (PONT) model has been used for studying secondary
degeneration of retinal ganglion cells (RGCs) in recent years. In this study, we carried
out PONT of the temporal side of rat optic nerves, whereas PONT was carried out of the
superior side in the previous publication. We found that this surgery is better and easier
than the previous method and can produce a repeatable and reliable model. We detected
significant changes in the polarization of microglia/macrophages and the level of
autophagy in optic nerves after PONT. We also used this model to detect the effects of the
polysaccharides extracted from Lycium barbarum (LBP) on the survival of
RGCs and the changes in the polarization of microglia/macrophages and the level of
autophagy after PONT. We find that LBP can delay secondary degeneration of RGCs after
temporal injury of optic nerves, promote the M2 polarization of microglia/macrophages, and
down-regulate the level of autophagy after PONT. In conclusion, we find that the
polarization of microglia/macrophages and the autophagy level change after PONT; LBP
treatment delays secondary degeneration of RGCs; and the polarization of
microglia/macrophages and the level of autophagy are also altered after LBP treatment.
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Affiliation(s)
- Hong-Ying Li
- 1 Department of Anatomy, Medical School, Jinan University, Guangzhou, China.,2 Collaborative Joint Laboratory, Guangdong-Hongkong-Macau Institute of CNS Regeneration, Ministry of Education CNS Regeneration, Jinan University, Guangzhou, China.,3 Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou, China
| | - Mi Huang
- 2 Collaborative Joint Laboratory, Guangdong-Hongkong-Macau Institute of CNS Regeneration, Ministry of Education CNS Regeneration, Jinan University, Guangzhou, China.,3 Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou, China
| | - Qiu-Yan Luo
- 1 Department of Anatomy, Medical School, Jinan University, Guangzhou, China
| | - Xi Hong
- 1 Department of Anatomy, Medical School, Jinan University, Guangzhou, China.,2 Collaborative Joint Laboratory, Guangdong-Hongkong-Macau Institute of CNS Regeneration, Ministry of Education CNS Regeneration, Jinan University, Guangzhou, China.,3 Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou, China
| | - Seeram Ramakrishna
- 2 Collaborative Joint Laboratory, Guangdong-Hongkong-Macau Institute of CNS Regeneration, Ministry of Education CNS Regeneration, Jinan University, Guangzhou, China
| | - Kwok-Fai So
- 2 Collaborative Joint Laboratory, Guangdong-Hongkong-Macau Institute of CNS Regeneration, Ministry of Education CNS Regeneration, Jinan University, Guangzhou, China.,3 Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou, China.,4 Guangdong Key Laboratory of Brain Function and Diseases, Jinan University, Guangzhou, China.,5 State Key Laboratory of Brain and Cognitive Sciences and Department of Ophthalmology, The University of Hong Kong, Hong Kong, China
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31
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Zhong L, Jiang X, Zhu Z, Qin H, Dinkins MB, Kong JN, Leanhart S, Wang R, Elsherbini A, Bieberich E, Zhao Y, Wang G. Lipid transporter Spns2 promotes microglia pro-inflammatory activation in response to amyloid-beta peptide. Glia 2018; 67:498-511. [PMID: 30484906 DOI: 10.1002/glia.23558] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 08/31/2018] [Accepted: 10/22/2018] [Indexed: 12/29/2022]
Abstract
Accumulating evidence indicates that neuroinflammation contributes to the pathogenesis and exacerbation of neurodegenerative disorders, such as Alzheimer's disease (AD). Sphingosine-1-phosphate (S1P) is a pleiotropic bioactive lipid that regulates many pathophysiological processes including inflammation. We present evidence here that the spinster homolog 2 (Spns2), a S1P transporter, promotes microglia pro-inflammatory activation in vitro and in vivo. Spns2 knockout (Spns2KO) in primary cultured microglia resulted in significantly reduced levels of pro-inflammatory cytokines induced by lipopolysaccharide (LPS) and amyloid-beta peptide 1-42 oligomers (Aβ42) when compared with littermate controls. Fingolimod (FTY720), a S1P receptor 1 (S1PR1) functional antagonist and FDA approved drug for relapsing-remitting multiple sclerosis, partially blunted Aβ42-induced pro-inflammatory cytokine generation, suggesting that Spns2 promotes microglia pro-inflammatory activation through S1P-signaling. Spns2KO significantly reduced Aβ42-induced nuclear factor kappa B (NFκB) activity. S1P increased, while FTY720 dampened, Aβ42-induced NFκB activity, suggesting that Spns2 activates microglia inflammation through, at least partially, NFκB pathway. Spns2KO mouse brains showed significantly reduced Aβ42-induced microglia activation/accumulation and reduced levels of pro-inflammatory cytokines when compared with age-matched controls. More interestingly, Spns2KO ameliorated Aβ42-induced working memory deficit detected by Y-Maze. In summary, these results suggest that Spns2 promotes pro-inflammatory polarization of microglia and may play a crucial role in AD pathogenesis.
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Affiliation(s)
- Liansheng Zhong
- Department of Physiology, University of Kentucky, Lexington, Kentucky.,Department of Bioinformatics, Key Laboratory of Cell Biology of Ministry of Public Health, College of Life Sciences, China Medical University, Shenyang, China
| | - Xue Jiang
- Department of Physiology, University of Kentucky, Lexington, Kentucky.,Shengjing Hospital, China Medical University, Shenyang, Liaoning, China
| | - Zhihui Zhu
- Department of Physiology, University of Kentucky, Lexington, Kentucky
| | - Haiyan Qin
- Department of Physiology, University of Kentucky, Lexington, Kentucky
| | - Michael B Dinkins
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Ji-Na Kong
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Silvia Leanhart
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Rebecca Wang
- Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, Maryland
| | - Ahmed Elsherbini
- Department of Physiology, University of Kentucky, Lexington, Kentucky
| | - Erhard Bieberich
- Department of Physiology, University of Kentucky, Lexington, Kentucky.,Department of Neuroscience and Regenerative Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Yujie Zhao
- Department of Bioinformatics, Key Laboratory of Cell Biology of Ministry of Public Health, College of Life Sciences, China Medical University, Shenyang, China
| | - Guanghu Wang
- Department of Physiology, University of Kentucky, Lexington, Kentucky
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32
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Gu BJ, Wiley JS. P2X7 as a scavenger receptor for innate phagocytosis in the brain. Br J Pharmacol 2018; 175:4195-4208. [PMID: 30098011 DOI: 10.1111/bph.14470] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 07/20/2018] [Accepted: 07/25/2018] [Indexed: 12/29/2022] Open
Abstract
The P2X7 receptor has been widely studied for its ATP-induced pro-inflammatory effect, but in the absence of a ligand, P2X7 has a second function as a scavenger receptor, which is active in the development of the human brain. The scavenger activity of P2X7 is only evident in the absence of serum but is fully active in cerebrospinal fluid. P2X7 on the cell surface is present as a membrane complex, and an attachment to non-muscle myosin of the cytoskeleton is required for particle engulfment. Selective antagonists of P2X7 pro-inflammatory function have little effect on phagocytosis, but inheritance of a variant haplotype spanning the P2RX7 and P2RX4 genes has been associated with loss of P2X7-mediated phagocytosis. Recent studies in mice suggest that the innate phagocytosis mediated by P2X7 receptors declines with ageing. Thus, defective P2X7-mediated phagocytosis may contribute to age-related neuro-degenerative diseases including Alzheimer's disease, age-related macular degeneration and primary progressive multiple sclerosis.
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Affiliation(s)
- Ben J Gu
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - James S Wiley
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Melbourne, Victoria, Australia
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Ou A, Gu BJ, Wiley JS. The scavenger activity of the human P2X7 receptor differs from P2X7 pore function by insensitivity to antagonists, genetic variation and sodium concentration: Relevance to inflammatory brain diseases. Biochim Biophys Acta Mol Basis Dis 2018; 1864:1051-1059. [PMID: 29329985 DOI: 10.1016/j.bbadis.2018.01.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 01/02/2018] [Accepted: 01/08/2018] [Indexed: 01/08/2023]
Abstract
Activation of P2X7 receptors is widely recognised to initiate proinflammatory responses. However P2X7 also has a dual function as a scavenger receptor which is active in the absence of ATP and plasma proteins and may be important in central nervous system (CNS) diseases. Here, we investigated both P2X7 pore formation and its phagocytic function in fresh human monocytes (as a model of microglia) by measuring ATP-induced ethidium dye uptake and fluorescent bead uptake respectively. This was studied in monocytes expressing various polymorphic variants as well as in the presence of different P2X7 antagonists and ionic media. P2X7-mediated phagocytosis was found to account for about half of Latrunculin (or Cytochalasin D)-sensitive bead engulfment by fresh human monocytes. Monocytes harbouring P2X7 Ala348Thr or Glu496Ala polymorphic variants showed increase or loss of ethidium uptake respectively, but these changes in pore formation did not always correspond to the changes in phagocytosis of YG beads. Unlike pore function, P2X7-mediated phagocytosis was not affected by three potent selective P2X7 antagonists and remained identical in Na+ and K+ media. Taken together, our results show that P2X7 is a scavenger receptor with important function in the CNS but its phagocytic function has features distinct from its pore function. Both P2X7 pore formation and P2X7-mediated phagocytosis should be considered in the design of new P2X7 antagonists for the treatment of CNS diseases.
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Affiliation(s)
- Amber Ou
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Victoria, Australia
| | - Ben J Gu
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Victoria, Australia
| | - James S Wiley
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Victoria, Australia.
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Abstract
Microglia serve as brain-resident myeloid cells that affect cerebral development, ischemia, neurodegeneration, and neuro-viral infection. MicroRNAs play a key role in central nervous system disease through post-transcriptional regulation. Indeed, evidence shows that microRNAs are one of the most important regulators mediating microglial activation, polarization, and autophagy, and subsequently affecting neuroinflammation and the outcome of central nervous system disease. In this review, we provide insight into the function of microRNAs, which may be an attractive strategy and influential treatment for microglia-related central nervous system dysfunction. Moreover, we comprehensively describe how microglia fight against central nervous system disease via multiple functional microRNAs.
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Affiliation(s)
- Xiao-Hua Wang
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University; Institute of Geriatrics; National Clinical Research Center for Geriatric Disorders, Beijing, China
| | - Tian-Long Wang
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University; Institute of Geriatrics; National Clinical Research Center for Geriatric Disorders, Beijing, China
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Lannes N, Eppler E, Etemad S, Yotovski P, Filgueira L. Microglia at center stage: a comprehensive review about the versatile and unique residential macrophages of the central nervous system. Oncotarget 2017; 8:114393-114413. [PMID: 29371994 PMCID: PMC5768411 DOI: 10.18632/oncotarget.23106] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 11/15/2017] [Indexed: 02/07/2023] Open
Abstract
Microglia cells are the unique residential macrophages of the central nervous system (CNS). They have a special origin, as they derive from the embryonic yolk sac and enter the developing CNS at a very early stage. They play an important role during CNS development and adult homeostasis. They have a major contribution to adult neurogenesis and neuroinflammation. Thus, they participate in the pathogenesis of neurodegenerative diseases and contribute to aging. They play an important role in sustaining and breaking the blood-brain barrier. As innate immune cells, they contribute substantially to the immune response against infectious agents affecting the CNS. They play also a major role in the growth of tumours of the CNS. Microglia are consequently the key cell population linking the nervous and the immune system. This review covers all different aspects of microglia biology and pathology in a comprehensive way.
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Affiliation(s)
- Nils Lannes
- Albert Gockel, Anatomy, Department of Medicine, University of Fribourg, CH-1700 Fribourg, Switzerland
| | - Elisabeth Eppler
- Pestalozzistrasse Zo, Department of BioMedicine, University of Basel, CH-4056 Basel, Switzerland
| | - Samar Etemad
- Building 71/218 RBWH Herston, Centre for Clinical Research, The University of Queensland, QLD 4029 Brisbane, Australia
| | - Peter Yotovski
- Albert Gockel, Anatomy, Department of Medicine, University of Fribourg, CH-1700 Fribourg, Switzerland
| | - Luis Filgueira
- Albert Gockel, Anatomy, Department of Medicine, University of Fribourg, CH-1700 Fribourg, Switzerland
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Geloso MC, Corvino V, Marchese E, Serrano A, Michetti F, D'Ambrosi N. The Dual Role of Microglia in ALS: Mechanisms and Therapeutic Approaches. Front Aging Neurosci 2017; 9:242. [PMID: 28790913 PMCID: PMC5524666 DOI: 10.3389/fnagi.2017.00242] [Citation(s) in RCA: 157] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 07/11/2017] [Indexed: 12/14/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterized by a non-cell autonomous motor neuron loss. While it is generally believed that the disease onset takes place inside motor neurons, different cell types mediating neuroinflammatory processes are considered deeply involved in the progression of the disease. On these grounds, many treatments have been tested on ALS animals with the aim of inhibiting or reducing the pro-inflammatory action of microglia and astrocytes and counteract the progression of the disease. Unfortunately, these anti-inflammatory therapies have been only modestly successful. The non-univocal role played by microglia during stress and injuries might explain this failure. Indeed, it is now well recognized that, during ALS, microglia displays different phenotypes, from surveillant in early stages, to activated states, M1 and M2, characterized by the expression of respectively harmful and protective genes in later phases of the disease. Consistently, the inhibition of microglial function seems to be a valid strategy only if the different stages of microglia polarization are taken into account, interfering with the reactivity of microglia specifically targeting only the harmful pathways and/or potentiating the trophic ones. In this review article, we will analyze the features and timing of microglia activation in the light of M1/M2 phenotypes in the main mice models of ALS. Moreover, we will also revise the results obtained by different anti-inflammatory therapies aimed to unbalance the M1/M2 ratio, shifting it towards a protective outcome.
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Affiliation(s)
- Maria Concetta Geloso
- Institute of Anatomy and Cell Biology, Università Cattolica del Sacro CuoreRome, Italy
| | - Valentina Corvino
- Institute of Anatomy and Cell Biology, Università Cattolica del Sacro CuoreRome, Italy
| | - Elisa Marchese
- Institute of Anatomy and Cell Biology, Università Cattolica del Sacro CuoreRome, Italy
| | - Alessia Serrano
- Institute of Anatomy and Cell Biology, Università Cattolica del Sacro CuoreRome, Italy
| | - Fabrizio Michetti
- Institute of Anatomy and Cell Biology, Università Cattolica del Sacro CuoreRome, Italy.,IRCCS San Raffaele Scientific Institute, Università Vita-Salute San RaffaeleMilan, Italy
| | - Nadia D'Ambrosi
- Department of Biology, University of Rome Tor VergataRome, Italy
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Abstract
Microglia are the principal resident immune cells in the central nervous system and are believed to be versatile players in both inflammatory and physiological contexts. On the one hand, in order to safeguard the microenvironment microglia can be rapidly activated by contact with microbial products or cell debris, thereby exerting the functions of innate immunity via phagocytosis and secretion of cytokines and chemokines. Conversely, microglia can also assist in brain development, synaptic plasticity and neural repair through the production of neurotrophic factors and clearance of myelin debris. It is now well accepted that the dysfunction of microglia and microglia-induced neuroinflammation are implicated in the occurrence and progression of many neurological diseases. Although the past decade has witnessed major progress in understanding of multi-tasking microglia, what remains largely enigmatic is the relative importance of microglia at different disease stages and how microglia should be targeted for optimal therapeutic efficacy. Notably, microglia depletion through genetic targeting or pharmacological therapies can be viewed as effective tools to stimulate new microglia to repopulate the central nervous system. Microglia depletion and subsequent repopulation at defined stages in various experimental animal model disorders allow us to extend our knowledge of molecular mechanisms, thus holding promise for designing strategies to resolve neuroinflammation and promote recovery. Herein we highlight the highly plastic and diverse phenotypes of microglia and outline the lessons learned from microglia depletion approaches.
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Affiliation(s)
- Jinming Han
- Applied Immunology and Immunotherapy, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Karolinska University Hospital at Solna, CMM L8:04, Karolinska Sjukhuset, S-171 76, Stockholm, Sweden
| | - Robert A Harris
- Applied Immunology and Immunotherapy, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Karolinska University Hospital at Solna, CMM L8:04, Karolinska Sjukhuset, S-171 76, Stockholm, Sweden
| | - Xing-Mei Zhang
- Applied Immunology and Immunotherapy, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Karolinska University Hospital at Solna, CMM L8:04, Karolinska Sjukhuset, S-171 76, Stockholm, Sweden.
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