Chronic GVHD (cGVHD) is the major cause of late, nonrelapse death following stem cell transplantation and characteristically develops in organs such as skin and lung. Here, we used multiple murine models of cGVHD to investigate the contribution of macrophage populations in the development of cGVHD. Using an established IL-17–dependent sclerodermatous cGVHD model, we confirmed that macrophages infiltrating the skin are derived from donor bone marrow (F4/80+CSF-1R+CD206+iNOS–). Cutaneous cGVHD developed in a CSF-1/CSF-1R–dependent manner, as treatment of recipients after transplantation with CSF-1 exacerbated macrophage infiltration and cutaneous pathology. Additionally, recipients of grafts from
Kylie A. Alexander, Ryan Flynn, Katie E. Lineburg, Rachel D. Kuns, Bianca E. Teal, Stuart D. Olver, Mary Lor, Neil C. Raffelt, Motoko Koyama, Lucie Leveque, Laetitia Le Texier, Michelle Melino, Kate A. Markey, Antiopi Varelias, Christian Engwerda, Jonathan S. Serody, Baptiste Janela, Florent Ginhoux, Andrew D. Clouston, Bruce R. Blazar, Geoffrey R. Hill, Kelli P.A. MacDonald
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