To examine whether MICU1 was dysregulated in CMECs and contributed to DCM, we initially analyzed cell-type MICU1 expression in different organ tissues and hearts of adults in The Human Protein Atlas (https://www.proteinatlas.org/ENSG00000107745-MICU1/single+cell+type/heart+muscle). This evidence concerns the gene MICU1 and familial dilated cardiomyopathy.