Fig. 4

CSC acute retention and engraftment: PET quantitative results (a). Data is shown as %ID in every organ, after 4 h of IM (n = 3) or IC (n = 3) administration of ¹⁸F-FDG labelled cells. Data is represented as mean plus standard deviation. Representative images of engrafted GFP⁺ cells in the heart (b). Tissue sections were immunohistochemically stained for detection of GFP⁺-CSC (in brown), 3 days post-implant. Positive cells were found in the hearts of all the IM implanted pigs, whereas no cells were found in any of the IC injected pigs. A representative picture (and magnification) shows the presence of engrafted CSC in the myocardium of an IM implanted pig