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Julien A, Perrin S, Martínez-Sarrà E, Kanagalingam A, Carvalho C, Luka M, Ménager M, Colnot C. Skeletal Stem/Progenitor Cells in Periosteum and Skeletal Muscle Share a Common Molecular Response to Bone Injury. J Bone Miner Res 2022; 37:1545-1561. [PMID: 35652423 PMCID: PMC9543664 DOI: 10.1002/jbmr.4616] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 05/19/2022] [Accepted: 05/28/2022] [Indexed: 11/07/2022]
Abstract
Bone regeneration involves skeletal stem/progenitor cells (SSPCs) recruited from bone marrow, periosteum, and adjacent skeletal muscle. To achieve bone reconstitution after injury, a coordinated cellular and molecular response is required from these cell populations. Here, we show that SSPCs from periosteum and skeletal muscle are enriched in osteochondral progenitors, and more efficiently contribute to endochondral ossification during fracture repair as compared to bone-marrow stromal cells. Single-cell RNA sequencing (RNAseq) analyses of periosteal cells reveal the cellular heterogeneity of periosteum at steady state and in response to bone fracture. Upon fracture, both periosteal and skeletal muscle SSPCs transition from a stem/progenitor to a fibrogenic state prior to chondrogenesis. This common activation pattern in periosteum and skeletal muscle SSPCs is mediated by bone morphogenetic protein (BMP) signaling. Functionally, Bmpr1a gene inactivation in platelet-derived growth factor receptor alpha (Pdgfra)-derived SSPCs impairs bone healing and decreases SSPC proliferation, migration, and osteochondral differentiation. These results uncover a coordinated molecular program driving SSPC activation in periosteum and skeletal muscle toward endochondral ossification during bone regeneration. © 2022 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Anais Julien
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
| | - Simon Perrin
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
| | | | | | | | - Marine Luka
- Imagine Institute, Laboratory of Inflammatory Responses and Transcriptomic Networks in Diseases, Atip-Avenir Team, INSERM UMR 1163, Université de Paris, Paris, France.,Labtech Single-Cell@Imagine, Imagine Institute, INSERM UMR 1163, Paris, France
| | - Mickaël Ménager
- Imagine Institute, Laboratory of Inflammatory Responses and Transcriptomic Networks in Diseases, Atip-Avenir Team, INSERM UMR 1163, Université de Paris, Paris, France.,Labtech Single-Cell@Imagine, Imagine Institute, INSERM UMR 1163, Paris, France
| | - Céline Colnot
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
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Julien A, Kanagalingam A, Martínez-Sarrà E, Megret J, Luka M, Ménager M, Relaix F, Colnot C. Direct contribution of skeletal muscle mesenchymal progenitors to bone repair. Nat Commun 2021; 12:2860. [PMID: 34001878 PMCID: PMC8128920 DOI: 10.1038/s41467-021-22842-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 03/29/2021] [Indexed: 12/13/2022] Open
Abstract
Bone regenerates by activation of tissue resident stem/progenitor cells, formation of a fibrous callus followed by deposition of cartilage and bone matrices. Here, we show that mesenchymal progenitors residing in skeletal muscle adjacent to bone mediate the initial fibrotic response to bone injury and also participate in cartilage and bone formation. Combined lineage and single-cell RNA sequencing analyses reveal that skeletal muscle mesenchymal progenitors adopt a fibrogenic fate before they engage in chondrogenesis after fracture. In polytrauma, where bone and skeletal muscle are injured, skeletal muscle mesenchymal progenitors exhibit altered fibrogenesis and chondrogenesis. This leads to impaired bone healing, which is due to accumulation of fibrotic tissue originating from skeletal muscle and can be corrected by the anti-fibrotic agent Imatinib. These results elucidate the central role of skeletal muscle in bone regeneration and provide evidence that skeletal muscle can be targeted to prevent persistent callus fibrosis and improve bone healing after musculoskeletal trauma.
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Affiliation(s)
- Anais Julien
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
| | | | | | - Jérome Megret
- Cytometry core facility, Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris, France
| | - Marine Luka
- Laboratory of Inflammatory Responses and Transcriptomic Networks in Diseases, Université de Paris, Imagine Institute, INSERM UMR 1163, Paris, France
| | - Mickaël Ménager
- Laboratory of Inflammatory Responses and Transcriptomic Networks in Diseases, Université de Paris, Imagine Institute, INSERM UMR 1163, Paris, France
| | | | - Céline Colnot
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France.
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