Metabolomics Ex/GWAS in the Amish reveals novel insights into cardiometabolic disease pathways
Jallow, M. W.; Tzoneva, G.; Ye, B.; Backman, J.; Zavala, V. A.; Sosina, O.; Kapoor, M.; Verweij, N.; Landheer, K.; Geraghty, B.; Marchini, J.; Locke, A.; Bovijn, J.; Nielsen, J.; Lotta, L.; Regeneron Genetics Center, ; Montasser, M. E.; Lewis, J.; Mitchell, B. D.; Shuldiner, A. R.
Show abstract
We conducted an exome and genome-wide association study (Ex/GWAS) of 1,015 metabolites in serum samples from 5,981 Amish adults. We identified 149 functional or likely functional genetic variants, based on CADD scores significantly associated (P < 5.8 x 10-8) with 519 metabolite levels, 69 of which were >10-fold enriched in the Amish versus Europeans in gnomAD. We discovered novel associations involving a PCK2 splice-donor variant (rs138881435) and metabolites important for energy metabolism and mitochondrial function. In UK Biobank participants, this variant was associated with increased longitudinal relaxation time (T1) values on liver MRI suggesting increased inflammation and fibrosis. Furthermore, we found novel associations involving ENPEP stop-gain variant (rs33966350) and peptide and amino acid metabolite levels, implicating ENPEPs roles in blood pressure regulation. Additional known and novel genetic variant-metabolite associations were identified including genes involved in Amish-enriched Mendelian diseases and cardiometabolic traits, providing insights into underlying mechanisms of these disorders.
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