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Deciphering the Genetic Crosstalk between Microglia and Oligodendrocyte Precursor Cells during Demyelination and Remyelination Using Transcriptomic Data. Int J Mol Sci 2022; 23:ijms232314868. [PMID: 36499195 PMCID: PMC9738937 DOI: 10.3390/ijms232314868] [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: 09/22/2022] [Revised: 11/20/2022] [Accepted: 11/23/2022] [Indexed: 11/29/2022] Open
Abstract
Demyelinating disorders show impaired remyelination due to failure in the differentiation of oligodendrocyte progenitor cells (OPCs) into mature myelin-forming oligodendrocytes, a process driven by microglia-OPC crosstalk. Through conducting a transcriptomic analysis of microarray studies on the demyelination-remyelination cuprizone model and using human samples of multiple sclerosis (MS), we identified molecules involved in this crosstalk. Differentially expressed genes (DEGs) of specific regions/cell types were detected in GEO transcriptomic raw data after cuprizone treatment and in MS samples, followed by functional analysis with GO terms and WikiPathways. Additionally, microglia-OPC crosstalk between microglia ligands, OPC receptors and target genes was examined with the NicheNet model. We identified 108 and 166 DEGs in the demyelinated corpus callosum (CC) at 2 and 4 weeks of cuprizone treatment; 427 and 355 DEGs in the remyelinated (4 weeks of cuprizone treatment + 14 days of normal diet) compared to 2- and 4-week demyelinated CC; 252 DEGs in MS samples and 2730 and 12 DEGs in OPC and microglia of 4-week demyelinated CC. At this time point, we found 95 common DEGs in the CC and OPCs, and one common DEG in microglia and OPCs, mostly associated with myelin and lipid metabolism. Crosstalk analysis identified 47 microglia ligands, 43 OPC receptors and 115 OPC target genes, all differentially expressed in cuprizone-treated samples and associated with myelination. Our differential expression pipeline identified demyelination/remyelination transcriptomic biomarkers in studies using diverse platforms and cell types/tissues. Cellular crosstalk analysis yielded novel markers of microglia ligands, OPC receptors and target genes.
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Melero-Jerez C, Fernández-Gómez B, Lebrón-Galán R, Ortega MC, Sánchez-de Lara I, Ojalvo AC, Clemente D, de Castro F. Myeloid-derived suppressor cells support remyelination in a murine model of multiple sclerosis by promoting oligodendrocyte precursor cell survival, proliferation, and differentiation. Glia 2020; 69:905-924. [PMID: 33217041 PMCID: PMC7894183 DOI: 10.1002/glia.23936] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 11/05/2020] [Accepted: 11/06/2020] [Indexed: 02/06/2023]
Abstract
The most frequent variant of multiple sclerosis (MS) is the relapsing–remitting form, characterized by symptomatic phases followed by periods of total/partial recovery. Hence, it is possible that these patients can benefit from endogenous agents that control the inflammatory process and favor spontaneous remyelination. In this context, there is increasing interest in the role of myeloid‐derived suppressor cells (MDSCs) during the clinical course of experimental autoimmune encephalomyelitis (EAE). MDSCs speed up infiltrated T‐cell anergy and apoptosis. In different animal models of MS, a milder disease course is related to higher presence/density of MDSCs in the periphery, and smaller demyelinated lesions in the central nervous system (CNS). These observations lead us to wonder whether MDSCs might not only exert an anti‐inflammatory effect but might also have direct influence on oligodendrocyte precursor cells (OPCs) and remyelination. In the present work, we reveal for the first time the relationship between OPCs and MDSCs in EAE, relationship that is guided by the distance from the inflammatory core. We describe the effects of MDSCs on survival, proliferation, as well as potent promoters of OPC differentiation toward mature phenotypes. We show for the first time that osteopontin is remarkably present in the analyzed secretome of MDSCs. The ablation of this cue from MDSCs‐secretome demonstrates that osteopontin is the main MDSC effector on these oligodendroglial cells. These data highlight a crucial pathogenic interaction between innate immunity and the CNS, opening ways to develop MDSC‐ and/or osteopontin‐based therapies to promote effective myelin preservation and repair in MS patients.
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Affiliation(s)
- Carolina Melero-Jerez
- Instituto Cajal-CSIC, Madrid, Spain.,Grupo de Neuroinmuno-Reparación, Hospital Nacional de Parapléjicos-SESCAM, Toledo, Spain
| | | | - Rafael Lebrón-Galán
- Grupo de Neuroinmuno-Reparación, Hospital Nacional de Parapléjicos-SESCAM, Toledo, Spain
| | - Maria Cristina Ortega
- Grupo de Neuroinmuno-Reparación, Hospital Nacional de Parapléjicos-SESCAM, Toledo, Spain
| | - Irene Sánchez-de Lara
- Grupo de Neuroinmuno-Reparación, Hospital Nacional de Parapléjicos-SESCAM, Toledo, Spain
| | - Ana Cristina Ojalvo
- Grupo de Neuroinmuno-Reparación, Hospital Nacional de Parapléjicos-SESCAM, Toledo, Spain
| | - Diego Clemente
- Grupo de Neuroinmuno-Reparación, Hospital Nacional de Parapléjicos-SESCAM, Toledo, Spain
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Malric L, Monferran S, Delmas C, Arnauduc F, Dahan P, Boyrie S, Deshors P, Lubrano V, Da Mota DF, Gilhodes J, Filleron T, Siegfried A, Evrard S, Kowalski-Chauvel A, Moyal ECJ, Toulas C, Lemarié A. Inhibiting Integrin β8 to Differentiate and Radiosensitize Glioblastoma-Initiating Cells. Mol Cancer Res 2018; 17:384-397. [PMID: 30266751 DOI: 10.1158/1541-7786.mcr-18-0386] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 07/13/2018] [Accepted: 09/12/2018] [Indexed: 11/16/2022]
Abstract
Glioblastomas (GB) are malignant brain tumors with poor prognosis despite treatment with surgery and radio/chemotherapy. These tumors are defined by an important cellular heterogeneity and notably contain a subpopulation of GB-initiating cells (GIC), which contribute to tumor aggressiveness, resistance, and recurrence. Some integrins are specifically expressed by GICs and could be actionable targets to improve GB treatment. Here, integrin β8 (ITGB8) was identified as a potential selective target in this highly tumorigenic GIC subpopulation. Using several patient-derived primocultures, it was demonstrated that ITGB8 is overexpressed in GICs compared with their differentiated progeny. Furthermore, ITGB8 is also overexpressed in GB, and its overexpression is correlated with poor prognosis and with the expression of several other classic stem cell markers. Moreover, inhibiting ITGB8 diminished several main GIC characteristics and features, including self-renewal ability, stemness, migration potential, and tumor formation capacity. Blockade of ITGB8 significantly impaired GIC cell viability via apoptosis induction. Finally, the combination of radiotherapy and ITGB8 targeting radiosensitized GICs through postmitotic cell death. IMPLICATIONS: This study identifies ITGB8 as a new selective marker for GICs and as a promising therapeutic target in combination with chemo/radiotherapy for the treatment of highly aggressive brain tumors.
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Affiliation(s)
- Laure Malric
- INSERM UMR 1037, Center for Cancer Research of Toulouse, Toulouse, France
| | - Sylvie Monferran
- INSERM UMR 1037, Center for Cancer Research of Toulouse, Toulouse, France.,Faculty of Pharmaceutical Sciences, University of Toulouse III Paul Sabatier, Toulouse, France
| | - Caroline Delmas
- INSERM UMR 1037, Center for Cancer Research of Toulouse, Toulouse, France
| | - Florent Arnauduc
- INSERM UMR 1037, Center for Cancer Research of Toulouse, Toulouse, France.,Faculty of Medicine of Rangueil, University of Toulouse III Paul Sabatier, Toulouse, France
| | - Perrine Dahan
- INSERM UMR 1037, Center for Cancer Research of Toulouse, Toulouse, France
| | - Sabrina Boyrie
- INSERM UMR 1037, Center for Cancer Research of Toulouse, Toulouse, France
| | - Pauline Deshors
- INSERM UMR 1037, Center for Cancer Research of Toulouse, Toulouse, France
| | - Vincent Lubrano
- Faculty of Medicine of Rangueil, University of Toulouse III Paul Sabatier, Toulouse, France.,INSERM UMR 1214 - ToNIC, Toulouse, France
| | - Dina Ferreira Da Mota
- Faculty of Medicine of Rangueil, University of Toulouse III Paul Sabatier, Toulouse, France
| | | | | | - Aurore Siegfried
- INSERM UMR 1037, Center for Cancer Research of Toulouse, Toulouse, France.,IUCT-Oncopole, Toulouse, France
| | - Solène Evrard
- INSERM UMR 1037, Center for Cancer Research of Toulouse, Toulouse, France.,Faculty of Medicine of Rangueil, University of Toulouse III Paul Sabatier, Toulouse, France.,IUCT-Oncopole, Toulouse, France
| | | | - Elizabeth Cohen-Jonathan Moyal
- INSERM UMR 1037, Center for Cancer Research of Toulouse, Toulouse, France.,Faculty of Medicine of Rangueil, University of Toulouse III Paul Sabatier, Toulouse, France.,IUCT-Oncopole, Toulouse, France
| | - Christine Toulas
- INSERM UMR 1037, Center for Cancer Research of Toulouse, Toulouse, France.,IUCT-Oncopole, Toulouse, France
| | - Anthony Lemarié
- INSERM UMR 1037, Center for Cancer Research of Toulouse, Toulouse, France. .,Faculty of Pharmaceutical Sciences, University of Toulouse III Paul Sabatier, Toulouse, France
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Jiang R, Prell C, Lönnerdal B. Milk osteopontin promotes brain development by up-regulating osteopontin in the brain in early life. FASEB J 2018; 33:1681-1694. [PMID: 30199283 DOI: 10.1096/fj.201701290rr] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Osteopontin (OPN) is a pleiotropic protein and is abundantly present in milk. Its functions include immune modulation and cellular proliferation and differentiation. OPN is highly expressed in the brain. We investigated the effects of milk-derived OPN on brain development of mouse pups. Wild-type (WT) dams producing OPN+ milk and OPN knockout (KO) dams producing OPN- milk nursed WT pups (OPN+/+), yielding 2 pup treatment groups, OPN+ OPN+/+ and OPN- OPN+/+, for comparison. Preliminary studies supported use of this model by showing high concentrations of OPN in milk of WT dams and no OPN in milk of OPN KO dams, and production of similar amounts of milk by WT and KO dams. The ability of ingested milk OPN to enter the brain was revealed by appearance of orally gavaged [125I]-labeled and antibody-probed milk OPN in brains of pups. Brain OPN mRNA levels were similar in both nursed groups, but the brain OPN protein level was significantly lower in the OPN- OPN+/+ group at postnatal days 6 and 8. Behavior tests showed impaired memory and learning ability in OPN- OPN+/+ pups. In addition, our study revealed increased expression of myelination-related proteins and elevated proliferation and differentiation of NG-2 glia into oligodendrocytes in the brain of OPN+ OPN+/+ pups, accompanied by increased activation of ERK-1/2 and PI3K/Akt signaling. We concluded that milk OPN can play an important role in brain development and behavior in infancy by promoting myelination.-Jiang, R., Prell, C., Lönnerdal, B. Milk osteopontin promotes brain development by up-regulating osteopontin in the brain in early life.
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Affiliation(s)
- Rulan Jiang
- Department of Nutrition, University of California Davis, Davis, California, USA
| | - Christine Prell
- Dr. von Hauner Children's Hospital, Ludwig Maximilians University, Munich, Germany
| | - Bo Lönnerdal
- Department of Nutrition, University of California Davis, Davis, California, USA
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