Abstract
Type 2 diabetes (T2D) is caused by both genetic and environmental factors and is associated with an increased risk of cardiorenal complications and mortality. Though disproportionately affected by the condition, African Americans (AA) are largely underrepresented in genetic studies of T2D, and few estimates of heritability have been calculated in this race group. Using genome-wide association study (GWAS) data paired with phenotypic data from ~ 19,300 AA participants of the Reasons for Geographic and Racial Differences in Stroke (REGARDS) study, Genetics of Hypertension Associated Treatments (GenHAT) study, and the Electronic Medical Records and Genomics (eMERGE) network, we estimated narrow-sense heritability using two methods: Linkage-Disequilibrium Adjusted Kinships (LDAK) and Genome-Wide Complex Trait Analysis (GCTA). Study-level heritability estimates adjusting for age, sex, and genetic ancestry ranged from 18% to 34% across both methods. Overall, the current study narrows the expected range for T2D heritability in this race group compared to prior estimates, while providing new insight into the genetic basis of T2D in AAs for ongoing genetic discovery efforts.
Original language | English (US) |
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Article number | 14009 |
Journal | Scientific reports |
Volume | 14 |
Issue number | 1 |
DOIs | |
State | Published - Dec 2024 |
Funding
The eMERGE Network was funded by the National Human Genome Research Institute (NHGRI) through the following grants: U01HG006828 (Cincinnati Children's Hospital Medical Center and Boston Children\u2019s Hospital); U01HG006830 (Children\u2019s Hospital of Philadelphia); U01HG006389 (Essentia Institute of Rural Health, Marshfield Clinic Research Foundation, and Pennsylvania State University); U01HG006382 (Geisinger Clinic); U01HG006375 (Group Health Cooperative and the University of Washington); U01HG006379 (Mayo Clinic); U01HG006380 (Icahn School of Medicine at Mount Sinai); U01HG006388 (Northwestern University); U01HG006378 (Vanderbilt University Medical Center); and U01HG006385 (Vanderbilt University Medical Center serving as the Coordinating Center). The eMERGE IV Mass General Brigham site was funded by the NHGRI through U01HG008685, the Columbia University site was funded through U01HG008680, and the University of Alabama at Birmingham site was funded through U01HG011167. The REGARDS (R01HL136666, MRI, LAL) and GenHAT (R01HL123782, MRI) genetic studies were supported by the National Heart, Lung, and Blood Institute (NHLBI). The parent REGARDS study was supported by cooperative agreement U01 NS041588, co-funded by the National Institute of Neurological Disorders and Stroke (NINDS) and the National Institute on Aging (NIA).The content is solely the responsibility of the authors and does not necessarily represent the official views of the NINDS or the NIA. Representatives of the NINDS were involved in the review of the manuscript but were not directly involved in the collection, management, analysis, or interpretation of the data. Other funding sources include NHLBI T32HL072757 (N.D.A.), UM1 DK078616 (J.B.M.) R01HL151855 (J.B.M.), R01HL092173 (N.A.L.), and R00AG054573 (T.G.).
Keywords
- Disparities
- Genetic polymorphisms
- Genomics
- Heritable quantitative trait
- Type 2 diabetes mellitus
ASJC Scopus subject areas
- General