Figure 4.

Cytotoxicity scores of peripheral blood leucocytes (PBLs) and mesenchymal stem cells (MSCs) from the equine leucocyte antigen (ELA)‐A3 microcytotoxicity assays. A standard two‐stage microcytotoxicity assay was used to compare the cytotoxicity of ELA‐A3 haplotype PBLs and MSCs following incubation with antisera. Mean cytotoxicity scores for ELA‐A3 haploytpe PBLs and MSC target cells following microcytotoxicity assay with n = 1 major histocompatibility complex (MHC)‐mismatched antisera neat a), 1:2 b), and 1:16 c) dilutions. Scores from the microcytotoxicity assay with the same MHC‐mismatched antisera and ELA‐A2 target cells from Figure 3 are included as reference.