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Skeletal stem/progenitor cells in periosteum and skeletal muscle share a common molecular response to bone injury

ABSTRACT: Skeletal stem/progenitor cells in periosteum and skeletal muscle share a common molecular response to bone injury

PROVIDER: PRJNA802667 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17853355.fastq.gz	Fastqsanger.gz
	SRR17853356.fastq.gz	Fastqsanger.gz
	SRR17853357.fastq.gz	Fastqsanger.gz
	SRR17853358.fastq.gz	Fastqsanger.gz

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Skeletal stem/progenitor cells in periosteum and skeletal muscle share a common molecular response to bone injury

Project description:Periosteum is a major source of skeletal stem/progenitor cells (SSPCs) during bone repair. However, the cellular composition of the periosteum is poorly characterized. Here, we provide single-cell RNAseq data of periosteal cells isolated by explant culture at steady state and at day 3 post-tibial fracture. We found that periosteal cell populations are heterogeneous containing several sub-populations of SSPCs. Upon fracture, SSPCs are activated by leaving their mesenchymal state, and engaging into fibrogenesis prior to chondrogenesis.

2022-08-10 | GSE195940 | GEO

Skeletal Stem/Progenitor Cells in Periosteum and Skeletal Muscle Share a Common Molecular Response to Bone Injury.

Project description: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).

| S-EPMC9543664 | biostudies-literature

Periosteum contains skeletal stem cells with high bone regenerative potential controlled by Periostin

Project description:Bone regeneration relies on the activation of skeletal stem cells (SSCs) that still remain poorly characterized. Here, we show that periosteum contains SSCs with high bone regenerative potential compared to bone marrow stromal cells/skeletal stem cells (BMSCs) in mice. Although periosteal cells (PCs) and BMSCs are derived from a common embryonic mesenchymal lineage, post-natally PCs exhibit greater clonogenicity, growth and differentiation capacity than BMSCs. During bone repair, PCs can efficiently contribute to cartilage and bone, and integrate long-term after transplantation. Molecular profiling uncovers genes encoding Periostin and other extracellular matrix molecules associated with the enhanced response to injury of PCs. Periostin gene deletion impairs PC functions and fracture consolidation. Periostin-deficient periosteum cannot reconstitute a pool of PCs after injury demonstrating the presence of SSCs within periosteum and the requirement of Periostin in maintaining this pool. Overall our results highlight the importance of analyzing periosteum and PCs to understand bone phenotypes.

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Project description:The development of alternatives for autologous bone grafts is a major focus of bone tissue engineering. To produce living implants, the use of skeletal stem and progenitor cells (SSPCs) are envisioned as key ingredients. SSPCs can be obtained from bone marrow, adipogenic tissue, dental pulp and periosteum. Human periosteum-derived cells (hPDCs) exhibit a number of progenitor characteristics and have well-documented in vivo bone formation capacity. Here, we have characterized and compared hPDCs derived from tibia with new sources of hPDCs, i.e. from maxilla and mandible (craniofacial hPDCs, as a potential source for tissue engineered implants for craniofacial applications.

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Single nuclei RNAseq of the human periosteum from patients with congenital pseudarthrosis of the tibia

Project description:Congenital pseudarthrosis of the tibia (CPT) is a severe pediatric disorder affecting children. CPT is characterized by tibial bowing at birth leading to spontaneous fracture and fibrous non-union. Our study showed the presence of biallelic inactivation of the NF1 gene in the periosteum at the pseudarthrosis site. To understand the impact of NF1 mutation on the periosteum, we performed single nuclei RNAseq of pathological periosteum collected from the pseudarthrosis site and of non-pathological periosteum collected from the iliac crest of 3 CPT patients.

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Premature aging of skeletal stem/progenitor cells rather than osteoblasts causes bone loss with mechanosensation decline

Project description:Distinct skeletal stem/progenitor cells (SSPCs) have been identified in the bone marrow, growth plate, and periosteum, which are indispensable for the maintenance and remodeling of the adult skeleton. However, the decline of which cell types are responsible for age-related bone loss and what characteristic changes of these cells during aging remain to be determined. Here, we constructed premature skeletal aging models by depleting metalloproteinase Zmpste24 (Z24) in mice and found that Prx1-dependent, but not Osx-dependent, Z24 deletion caused significant bone loss. Single-cell RNA sequencing (scRNA-seq) revealed that Prx1-expressing cells in the periosteum (pSSPCs) and growth plate (gpSSPCs) significantly declined in progeria mice. Consistent with aggrecan (Acan) expression in gpSSPCs but not pSSPCs, Acan-linked Z24 depletion only caused trabecular bone loss. Chromatin and transcriptional profiling demonstrate that premature aged SSPCs gain apoptotic signaling pathway and mechanosensation decline. Moreover, SSPCs increased after physical exersice and Z24 depletion’s effects on cellular apoptosis and extracellular matrix expression were reverted by mechanical stimuli. Overall, this study identifies that Z24 deficiency-induced impairment of mechanosensation in SSPCs causes bone loss, shedding new insight on how physical exercise can be used to improve bone quality and prevent bone aging.

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