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GFP-positive MSCs remained localized at the site of implantation at week 2. Confocal images of transected sciatic treated with a PLLA conduit containing (A) fibrin alone, (B) a fibrin matrix with control MSCs, or (C) a fibrin matrix with VEGF-MSCs. Conduits are oriented with the proximal end on the left and the distal end on the right. Green, GFP for endogenous green fluorescent protein positive-MSCs. Blue, DAPI for cell nuclei. Scale bar = 500 μm.
