Feline adipose-derived mesenchymal stem cells (ASCs) expressed surface markers consistent with an MSC phenotype. They were CD105+ (A), CD44+ (B), CD90+ (C), CD18− (D), and MHC II− (E). (F): They also suppressed proliferation of activated PBMCs in mixed leukocyte reactions experiments (n = 5; p = .03). Abbreviations: BrdU, 5-bromo-2′-deoxyuridine; ConA, concanavalin A; MSC, mesenchymal stem cell; PBMC, peripheral blood mononuclear cell.