IL4 and familial dilated cardiomyopathy: However, at 4 weeks after implantation of the DCM, there were no significant differences in serum IFN-γ, IL-4 and IL-12p70 levels between the GTKO mice and the blank control group, although the elevation of the anti-Gal IgG antibody stimulated by residual αGal antigen contained in the DCM occurred.