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Glycated serum protein genetics and pleiotropy with cardiometabolic risk factors


Johnson, MP and Keyho, R and Blackburn, NB and Laston, S and Kumar, S and Peralta, J and Thapa, SS and Towne, B and Subedi, J and Blangero, J and Williams-Blangero, S, Glycated serum protein genetics and pleiotropy with cardiometabolic risk factors, Journal of Diabetes Research, 2019 Article 2310235. ISSN 2314-6745 (2019) [Refereed Article]


Copyright Statement

Copyright 2019 Matthew P. Johnson et al. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

DOI: doi:10.1155/2019/2310235


Measurements of fasting glucose (FG) or glycated hemoglobin A1c (HbA1c) are two clinically approved approaches commonly used to determine glycemia, both of which are influenced by genetic factors. Obtaining accurate measurements of FG or HbA1c is not without its challenges, though. Measuring glycated serum protein (GSP) offers an alternative approach for assessing glycemia. The aim of this study was to estimate the heritability of GSP and GSP expressed as a percentage of total serum albumin (%GA) using a variance component approach and localize genomic regions (QTLs) that harbor genes likely to influence GSP and %GA trait variation in a large extended multigenerational pedigree from Jiri, Nepal (n = 1,800). We also performed quantitative bivariate analyses to assess the relationship between GSP or %GA and several cardiometabolic traits. Additive genetic effects significantly influence variation in GSP and %GA levels (p values: 1.15 10-5 and 3.39 10-5, respectively). We localized a significant (LOD score = 3.18) and novel GSP QTL on chromosome 11q, which has been previously linked to type 2 diabetes. Two common (MAF > 0.4) SNPs within the chromosome 11 QTL were associated with GSP (adjusted pvalue < 5.87 10-5): an intronic variant (rs10790184) in the DSCAML1 gene and a 3'UTR variant (rs8258) in the CEP164 gene. Significant positive correlations were observed between GSP or %GA and blood pressure, and lipid traits (p values: 0.0062 to 1.78 10-9). A significant negative correlation was observed between %GA and HDL cholesterol (p = 1.12 10-5). GSP is influenced by genetic factors and can be used to assess glycemia and diabetes risk. Thus, GSP measurements can facilitate glycemic studies when accurate FG and/or HbA1c measurements are difficult to obtain. GSP can also be measured from frozen blood (serum) samples, which allows the prospect of retrospective glycemic studies using archived samples.

Item Details

Item Type:Refereed Article
Research Division:Biomedical and Clinical Sciences
Research Group:Clinical sciences
Research Field:Endocrinology
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Blackburn, NB (Dr Nicholas Blackburn)
UTAS Author:Peralta, J (Mr Juan Peralta Fernandez)
ID Code:133619
Year Published:2019
Web of Science® Times Cited:3
Deposited By:Menzies Institute for Medical Research
Deposited On:2019-07-04
Last Modified:2021-07-12
Downloads:20 View Download Statistics

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