APOLD1 and familial dilated cardiomyopathy: Disease-specific gene sets, some of which are involved in lipid metabolism, were found to be differentially changed between DCM and HCM, such as the up-regulated APOE and the down-regulated GPT in DCM, as well as the up-regulated APOLD1 and the down-regulated STARD13 and PON3 in HCM.