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- W3216820480 abstract "Introduction: Genetic testing for non-ischemic dilated cardiomyopathy (DCM) currently comprises assessment of rare (monogenic) mutations in DCM-relevant genes. The role of a common-variant (polygenic) predictor for DCM has yet to be evaluated. Methods: Leveraging genotyping array and exome-sequencing data from UK Biobank, we curated monogenic, predicted loss-of-function (LOF) mutations in 91 genes on clinical genetic testing panels for DCM, and tested their prevalence and penetrance. Next, we constructed and evaluated a polygenic score for DCM from measures of left ventricular structure and function by cardiac magnetic resonance imaging. Finally, we combined monogenic carrier status with the polygenic score to estimate aggregate genetic risk for DCM. Results: Among study participants (N= 166,690), mean age was 57 (SD, 8.1) years, 75,154 (41%) were male, and 336 (0.21%) had DCM. 14.4% of DCM cases harbored a disease-relevant LOF mutation, including 8.8% within cardiac exons of the sarcomeric gene TTN . LOF mutations in TTN (OR, 25.36), DSP (OR, 17.55), and RBM20 (OR, 12.85) were the most strongly associated with dilated cardiomyopathy (all P < 0.001). 0.7% of all LOF carriers - and 4.0% of LOF carriers in TTN - developed DCM. A polygenic score comprising 2.3 million common genetic variants was strongly associated with DCM in all participants (OR per SD=1.62, p=8.61E-39), and in non-carriers (OR per SD=1.60, p=6.28E-15; N=159,811) and carriers (OR per SD=1.79, p=4.76E-05; N=6,879) of LOF mutations. Comparing the top and bottom 20% of the polygenic score, a >3-fold risk difference was observed among non-carriers of TTN LOF, and a >10-fold risk difference among TTN LOF carriers. TTN LOF carriers with high polygenic risk were at 46-fold odds of developing DCM as compared to non-carriers with intermediate polygenic risk (p=4.16E-29). Conclusions: Combining monogenic and polygenic risk expands the scope and improves the precision of clinical genetic testing for DCM." @default.
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- W3216820480 date "2021-11-16" @default.
- W3216820480 modified "2023-10-04" @default.
- W3216820480 title "Abstract 13271: Combined Assessments of Monogenic and Polygenic Risk for Dilated Cardiomyopathy" @default.
- W3216820480 doi "https://doi.org/10.1161/circ.144.suppl_1.13271" @default.
- W3216820480 hasPublicationYear "2021" @default.
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