Genome-wide Association Study of Lipid Traits in Youth With Type 2 Diabetes.

Abstract

CONTEXT:

Dyslipidemia is highly prevalent in youth with type 2 diabetes (T2D), yet the pathogenic components of dyslipidemia in youth with T2D are poorly understood.

OBJECTIVE:

To evaluate the genetic determinants of lipid traits in youth with T2D through a genome-wide association study.

DESIGN PARTICIPANTS AND MAIN OUTCOME MEASURES:

We genotyped 206 928 variants and imputed 17 642 824 variants in 1076 youth (mean age 15.0 ± 2.48 years) with T2D from the Treatment Options for Type 2 Diabetes in Adolescents and Youth (TODAY) and SEARCH for Diabetes in Youth (SEARCH) studies as part of the Progress in Diabetes Genetics in Youth (ProDiGY) consortium. We performed association testing for triglyceride and low-density lipoprotein cholesterol and high-density lipoprotein cholesterol (HDL-c) concentrations adjusted for the genetic relationship matrix within each substudy followed by meta-analyses for each trait.

RESULTS:

We identified a novel association between a deletion on chromosome 3 (3:67817380_AT/A_Deletion:RP11-81N13.1) and triglyceride levels at genome-wide level of significance (P = 2.3 × 10-8) with each risk allele increasing triglycerides by 20%. We also identified a genome-wide significant signal at rs247617 (P = 5.1 × 10-9) between HERFUD1 and CETP associated with HDL-c, with carriers of 1 copy of the risk allele having twice higher HDL-c.

CONCLUSIONS:

Our genetic analyses of lipid traits in youth with T2D have identified 1 novel and 1 previously known locus. Additional studies are needed to further characterize the genetic architecture of dyslipidemia in youth with T2D.

• Authors: Nicola Santoro, Ling Chen, Jennifer Todd, Jasmin Divers, Amy S Shah, Samuel S Gidding, Brian Burke, Morey Haymond, Leslie Lange, Santica Marcovina, Jason Flannick, Sonia Caprio, Jose C Florez, Shylaja Srinivasan
• Journal: Journal of the Endocrine Society (J Endocr Soc) Vol. 5 Issue 11 Pg. bvab139 (Nov 01 2021) ISSN: 2472-1972 [Electronic] United States
• PMID: 34568709 (Publication Type: Journal Article)
• Copyright: © The Author(s) 2021. Published by Oxford University Press on behalf of the Endocrine Society.