Cited by 444Extracellular vesicles in diseaseMesenchymal stem cell researchBone fractures and treatments

The DOI matches its Crossref record; 60 of the 60 references it cites were found in a registry or an index.

Mesenchymal Stem Cell-Derived Exosomes Promote Fracture Healing in a Mouse Model

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Abstract

Paracrine signaling by bone-marrow-derived mesenchymal stem cells (MSCs) plays a major role in tissue repair. Although the production of regulatory cytokines by MSC transplantation is a critical modulator of tissue regeneration, we focused on exosomes, which are extracellular vesicles that contain proteins and nucleic acids, as a novel additional modulator of cell-to-cell communication and tissue regeneration. To address this, we used radiologic imaging, histological examination, and immunohistochemical analysis to evaluate the role of exosomes isolated from MSC-conditioned medium (CM) in the healing process in a femur fracture model of CD9−/− mice, a strain that is known to produce reduced levels of exosomes. We found that the bone union rate in CD9−/− mice was significantly lower than wild-type mice because of the retardation of callus formation. The retardation of fracture healing in CD9−/− mice was rescued by the injection of exosomes, but this was not the case after the injection of exosomes-free conditioned medium (CM-Exo). The levels of the bone repair-related cytokines, monocyte chemotactic protein-1 (MCP-1), MCP-3, and stromal cell-derived factor-1 in exosomes were low compared with levels in CM and CM-Exo, suggesting that bone repair may be in part mediated by other exosome components, such as microRNAs. These results suggest that exosomes in CM facilitate the acceleration of fracture healing, and we conclude that exosomes are a novel factor of MSC paracrine signaling with an important role in the tissue repair process. Significance: This work focuses on exosomes, which are extracellular vesicles, as a novel additional modulator of cell-to-cell communication. This study evaluated the role of exosomes isolated from mesenchymal stem cell (MSC)-conditioned medium (MSC-CM) in the fracture-healing process of CD9−/− mice, a strain that is known to produce reduced levels of exosomes. Retardation of fracture healing in CD9−/− mice was rescued by the injection of MSC exosomes, but this was not the case after the injection of exosome-free CM. This study finds that MSC exosomes are a novel factor of MSC paracrine signaling, with an important role in the tissue repair process.

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Metadata

Authors
Furuta, T., Miyaki, S., Ishitobi, H., Ogura, T., Kato, Y., Kamei, N., Miyado, K., Higashi, Y., & Ochi, M.
Affiliations
  • Hiroshima University (JP)
  • Hiroshima University Hospital (JP)
  • National Institute of Advanced Industrial Science and Technology (JP)
  • National Center For Child Health and Development (JP)
Corresponding author
Furuta, Taisuke
Venue
Stem Cells Translational Medicine
Published
2016-07-26
Volume
5
Issue
12
Pages
1620-1630
ISSN
  • 2157-6564 (ISSN-L)
  • 2157-6580
OpenAlex
W2490529699
Cited by
444
References
60
Citations by year
2026: 18 · 2025: 35 · 2024: 41 · 2023: 44 · 2022: 52 · 2021: 90 · 2020: 64 · 2019: 44 · 2018: 37 · 2017: 17 · 2016: 1
FWCI
17.16
Type
journal article
Language
en
Open access
Locations
  • Stem Cells Translational Medicine (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Hiroshima University Acedemic Information Repository (Hiroshima University) (submittedVersion)
Funders
  • Ministry of Education, Culture, Sports, Science and Technology (21249079)
  • Japan Society for the Promotion of Science (26293363, 16K21192, 15H04959, 24689057, 14J05729, 21249079, 15H04365)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Extracellular vesicles in disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Mesenchymal stem cell research
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone fractures and treatments
Keywords
mesenchymal stem cells, exosomes, fracture healing, paracrine signaling, extracellular vesicles, CD9, conditioned medium, callus formation, bone regeneration, microRNA, CXCL12, MCP-1, tissue regeneration
MeSH terms
Animals, Body Weight, Disease Models, Animal, Gene Expression Regulation, Humans, Male, Mice, Inbred C57BL, Tibia, Bone Density, Cytokines, Culture Media, Conditioned, Fracture Healing, Gene Expression Profiling, MicroRNAs, Cell Line, Tumor, Exosomes, Mesenchymal Stem Cells, Tetraspanin 29

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