Potential role of myeloid-derived suppressor cells in transition from reaction to repair phase of bone healing process
| Autor: | May Wathone Oo, Keisuke Nakano, Hotaka Kawai, Kiyofumi Takabatake, Hitoshi Nagatsuka, Shintaro Sukegawa, Hidetsugu Tsujigiwa |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
T cell
new bone formation Inflammation Bone healing Fractures Bone Mice 03 medical and health sciences 0302 clinical medicine Osteogenesis Animals Humans Medicine Progenitor cell transition period Cell Proliferation Tibia biology Bone Injury business.industry Myeloid-Derived Suppressor Cells Osteoblast General Medicine Disease Models Animal medicine.anatomical_structure Cancer research Osteocalcin biology.protein Myeloid-derived Suppressor Cell myeloid-derived suppressor cells (MDSC) Female 030211 gastroenterology & hepatology Bone Remodeling medicine.symptom bone healing business Research Paper |
| Zdroj: | International Journal of Medical Sciences |
| ISSN: | 1449-1907 |
| Popis: | Myeloid-derived suppressor cells (MDSCs) are a heterogeneous population of immature myeloid cells with immunosuppressive functions; these cells play a key role in infection, immunization, chronic inflammation, and cancer. Recent studies have reported that immunosuppression plays an important role in the healing process of tissues and that Treg play an important role in fracture healing. MDSCs suppress active T cell proliferation and reduce the severity of arthritis in mice and humans. Together, these findings suggest that MDSCs play a role in bone biotransformation. In the present study, we examined the role of MDSCs in the bone healing process by creating a bone injury at the tibial epiphysis in mice. MDSCs were identified by CD11b and GR1 immunohistochemistry and their role in new bone formation was observed by detection of Runx2 and osteocalcin expression. Significant numbers of MDSCs were observed in transitional areas from the reactionary to repair stages. Interestingly, MDSCs exhibited Runx2 and osteocalcin expression in the transitional area but not in the reactionary area. And at the same area, cllagene-1 and ALP expression level increased in osteoblast progenitor cells. These data is suggesting that MDSCs emerge to suppress inflammation and support new bone formation. Here, we report, for the first time (to our knowledge), the role of MDSCs in the initiation of bone formation. MDSC appeared at the transition from inflammation to bone making and regulates bone healing by suppressing inflammation. |
| Databáze: | OpenAIRE |
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