In this study, after implantation of DCM in WT and GTKO mice, the vast majority of inflammatory cells was macrophage, and both CD4+ and CD8+ T lymphocytes were barely seen, which meant no αGal antibody-mediated cellular immunity was found at 4 weeks after implantation of DCM into GTKO mice. This evidence concerns the gene CD4 and familial dilated cardiomyopathy.