Mesenchymal stem cell–based tissue regeneration is governed by recipient T lymphocytes via IFN-γ and TNF-α
2011
Bone marrow-derived mesenchymal stem cells (BMMSCs) have so far failed to live up to their potential as a treatment for the repair of large bone defects. Songtao Shi and his colleagues now show that this may be due to their apoptosis mediated by resident T cells in the wound as a result of excess IFN-γ and TNF-α signaling. They show that reducing the levels of these cytokines, including through the local administration of aspirin, markedly increases the survival of implanted BMMSCs and improves bone wound healing in a mouse model.
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