Artikel ; Online: Epigenome-wide association study of plasma lipids in West Africans
EBioMedicine, Vol 89, Iss , Pp 104469- (2023)
the RODAM studyResearch in context
2023
Abstract: Summary: Background: DNA-methylation has been associated with plasma lipid concentration in populations of diverse ethnic backgrounds, but epigenome-wide association studies (EWAS) in West-Africans are lacking. The aim of this study was to identify DNA- ... ...
Abstract | Summary: Background: DNA-methylation has been associated with plasma lipid concentration in populations of diverse ethnic backgrounds, but epigenome-wide association studies (EWAS) in West-Africans are lacking. The aim of this study was to identify DNA-methylation loci associated with plasma lipids in Ghanaians. Methods: We conducted an EWAS using Illumina 450k DNA-methylation array profiles of extracted DNA from 663 Ghanaian participants. Differentially methylated positions (DMPs) were examined for association with plasma total cholesterol (TC), LDL-cholesterol, HDL-cholesterol, and triglycerides concentrations using linear regression models adjusted for age, sex, body mass index, diabetes mellitus, and technical covariates. Findings were replicated in independent cohorts of different ethnicities. Findings: We identified one significantly associated DMP with triglycerides (cg19693031 annotated to TXNIP, regression coefficient beta −0.26, false discovery rate adjusted p-value 0.001), which replicated in-silico in South African Batswana, African American, and European populations. From the top five DMPs with the lowest nominal p-values, two additional DMPs for triglycerides (CPT1A, ABCG1), two DMPs for LDL-cholesterol (EPSTI1, cg13781819), and one for TC (TXNIP) replicated. With the exception of EPSTI1, these loci are involved in lipid transport/metabolism or are known GWAS-associated loci. The top 5 DMPs per lipid trait explained 9.5% in the variance of TC, 8.3% in LDL-cholesterol, 6.1% in HDL-cholesterol, and 11.0% in triglycerides. Interpretation: The top DMPs identified in this study are in loci that play a role in lipid metabolism across populations, including West-Africans. Future studies including larger sample size, longitudinal study design and translational research is needed to increase our understanding on the epigenetic regulation of lipid metabolism among West-African populations. Funding: European Commission under the Framework Programme (grant number: 278901). |
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Schlagwörter | Methylation ; Epigenome-wide association study ; Cholesterol ; Lipids ; Sub-Saharan Africa ; West Africa ; Medicine ; R ; Medicine (General) ; R5-920 |
Thema/Rubrik (Code) | 310 |
Sprache | Englisch |
Erscheinungsdatum | 2023-03-01T00:00:00Z |
Verlag | Elsevier |
Dokumenttyp | Artikel ; Online |
Datenquelle | BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl) |
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