Genomic Variation Associated With Mortality Among Adults of European and African Ancestry With Heart Failure: The Cohorts for Heart and Aging Research in Genomic Epidemiology Consortium
Background Prognosis and survival are significant concerns for individuals with heart failure (HF) To better understand the pathophysiology of HF prognosis, the association between 2 366 858 single nucleotide polymorphisms (SNPs) and all cause mortality was evaluated among individuals with incident HF from 4 community based prospective cohorts: the Atherosclerosis Risk in Communities Study, the Cardiovascular Health Study, the Framingham Heart Study, and the Rotterdam Study. Methods and Results Participants were 2526 individuals of European ancestry and 466 individuals of African ancestry who experienced an incident HF event during follow up in the respective cohorts. Within each study, the association between genetic variants and time to mortality among individuals with HF was assessed by Cox proportional hazards models that included adjustment for sex and age at the time of the HF event. Prospective fixed effect meta analyses were conducted for the 4 study populations of European ancestry (N=1645 deaths) and for the 2 populations of African ancestry (N=281 deaths) Genome wide significance was set at P=5.0x10 7. Meta analytic findings among individuals of European ancestry revealed 1 genome wide significant locus on chromosome 3p22 in an intron of CKLF like MARVEL transmembrane domain containing 7 (CMTM7, P=3.2x10 7) Eight additional loci in individuals of European ancestry and 4 loci in individuals of African ancestry were identified by high signal SNPs (P<1.0x10 5) but did not meet genome wide significance. Conclusions This study identified a novel locus associated with all cause mortality among individuals of European ancestry with HF. This finding warrants additional investigation, including replication, in other studies of HF.
Circulation. Cardiovascular genetics