Fig. 1From: Aging, inflammation, stem cells, and bone healingThe effect of aging on mesenchymal stem cells and macrophages. ↑ increase, ↓ decrease, BM bone marrow, GM-CSF granulocyte macrophage colony-stimulating factor, MΦ macrophage, MSC mesenchymal stem cell, SA-β-gal senescence-associated β-galactosidase, TLR4 Toll-like receptor 4, TNF-α tumor necrosis factor-alphaBack to article page