Fig. 1

Mesenchymal stem cells (MSCs) function in an acute respiratory distress syndrome (ARDS) milieu. a ARDS animals treated with allogeneic MSCs show increased serum levels of interleukin-1 receptor antagonist (IL-1ra); b MSCs exposed to ARDS serum from treated animals demonstrate increased levels of IL-1ra; c decreased proliferation of MSCs exposed to ARDS serum from untreated animals; d decreased clonogenic capacity of MSCs exposed to ARDS serum from untreated animals