Periosteum contains skeletal stem cells with high bone regenerative potential controlled by Periostin.
Oriane Duchamp de LagenesteAnaïs JulienRana Abou-KhalilGiulia FrangiCaroline CarvalhoNicolas CagnardCorinne CordierSimon J ConwayCéline ColnotPublished in: Nature communications (2018)
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, postnatally 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.
Keyphrases
- stem cells
- bone regeneration
- bone mineral density
- extracellular matrix
- cell therapy
- bone marrow
- soft tissue
- mesenchymal stem cells
- bone loss
- genome wide
- induced apoptosis
- gene expression
- postmenopausal women
- high fat diet induced
- copy number
- cell death
- signaling pathway
- insulin resistance
- oxidative stress
- human health
- risk assessment
- skeletal muscle
- endoplasmic reticulum stress
- cell cycle arrest
- pi k akt