Cited by 383Bone fractures and treatmentsBone Metabolism and DiseasesBone Tissue Engineering Materials

TNF-α promotes fracture repair by augmenting the recruitment and differentiation of muscle-derived stromal cells

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Glass, Graeme E., Chan, James K., Freidin, Andrew, Feldmann, Marc, Horwood, Nicole J., Nanchahal, Jagdeep·2011·Proceedings of the National Academy of Sciences

Abstract

With an aging population, skeletal fractures are increasing in incidence, including the typical closed and the less common open fractures in normal bone, as well as fragility fractures in patients with osteoporosis. For the older age group, there is an urgent unmet need to induce predictable bone formation as well as improve implant fixation in situations such as hip joint replacement. Using a murine model of slow-healing fractures, we have previously shown that coverage of the fracture with muscle accelerated fracture healing and increased union strength. Here, we show that cells from muscle harvested after 3 d of exposure to an adjacent fracture differentiate into osteoblasts and form bone nodules in vitro. The osteogenic potential of these cells exceeds that of adipose and skin-derived stromal cells and is equivalent to bone marrow stromal cells. Supernatants from human fractured tibial bone fragments promote osteogenesis and migration of muscle-derived stromal cells (MDSC) in vitro. The main factor responsible for this is TNF-α, which promotes first MDSC migration, then osteogenic differentiation at low concentrations. However, TNF-α is inhibitory at high concentrations. In our murine model, addition of TNF-α at 1 ng/mL at the fracture site accelerated healing. These data indicate that manipulating the local inflammatory environment to recruit, then differentiate adjacent MDSC, may be a simple yet effective way to enhance bone formation and accelerate fracture repair. Our findings are based on a combination of human specimens and an in vivo murine model and may, therefore, translate to clinical care.

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Authors
Glass, G. E., Chan, J. K., Freidin, A., Feldmann, M., Horwood, N. J., & Nanchahal, J.
Affiliations
  • National Health Service (GB)
  • Imperial College London (GB)
Venue
Proceedings of the National Academy of Sciences
Published
2011-01-05
Volume
108
Issue
4
Pages
1585-1590
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2019451761
Cited by
383
References
48
Citations by year
2026: 14 · 2025: 16 · 2024: 30 · 2023: 29 · 2022: 21 · 2021: 27 · 2020: 32 · 2019: 17 · 2018: 30 · 2017: 27 · 2016: 24 · 2015: 30 · 2014: 39 · 2013: 19 · 2012: 17
FWCI
20.64
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • UEA Digital Repository (University of East Anglia) (submittedVersion)
Topics
  • Health Sciences › Medicine › Epidemiology › Bone fractures and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bone Metabolism and Diseases
  • Physical Sciences › Engineering › Biomedical Engineering › Bone Tissue Engineering Materials
Keywords
TNF-α, fracture healing, osteogenic differentiation, osteoblasts, bone formation, cell migration, local inflammation, mesenchymal stem cells, adipose-derived stromal cells, tibial fractures, total hip arthroplasty, osteoporotic fractures
MeSH terms
Alkaline Phosphatase, Animals, Cell Differentiation, Cell Movement, Cells, Cultured, Dose-Response Relationship, Drug, Flow Cytometry, Humans, Mice, Inbred C57BL, Osteogenesis, Platelet-Derived Growth Factor, Tumor Necrosis Factor-alpha, 5'-Nucleotidase, Fracture Healing, Stromal Cells, Muscle, Skeletal, Thy-1 Antigens, Chemokine CCL2, Muscle Cells, Cell Proliferation, Fractures, Bone, Mice, Chemokine CXCL12

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