SGCD and dilated cardiomyopathy: In this study, we used the J2N-n hamster as a control, which is the healthy control model of J2N-k (genetically, these two strains have very similar backgrounds except for the delta-sarcoglycan gene, which, when defective, is responsible for dilated cardiomyopathy) [11], and we analyzed the direct effect of cardiomyopathy.