Detection of MDSCs markers by immunofluorescence staining. The immunofluorescence staining results show that Sca-1, CD34, CD144 and Desmin were positively expressed, the CD45 was negative. a, d, g, j and m, blue staining represents DAPI counterstain of DMS/PCs nuclei; b, Sca-1+; e, CD34+; h, CD144+; k, CD73+; n, CD45-; c, f, i, l and o, merge (bar=25μm).