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A genome-wide association study of circulating galectin-3
Rudolf A de Boer1, Niek Verweij, Dirk J van Veldhuisen
1Department of Cardiology, University of Groningen, University Medical Center Groningen, The Netherlands.
Plos One
|October 12, 2012
Summary
This study identified two key genetic loci, LGALS3 and ABO, significantly associated with plasma galectin-3 levels. These findings advance our understanding of galectin-3
Area of Science:
- Genetics
- Biochemistry
- Immunology
Background:
- Galectin-3 is a lectin implicated in fibrosis, inflammation, and proliferation.
- Elevated circulating galectin-3 levels are linked to various diseases, including cancer and cardiovascular conditions.
Purpose of the Study:
- To investigate the genetic underpinnings of plasma galectin-3 levels.
- To identify genetic loci associated with galectin-3 concentrations through a genome-wide association study (GWAS).
Main Methods:
- Conducted a genome-wide association study (GWAS) on plasma galectin-3 levels in 3,776 subjects.
- Utilized Illumina HumanCytoSNP-12 array imputed with HapMap 2 CEU panel.
- Performed follow-up genotyping in an additional 3,516 subjects.
Main Results:
- Identified two genome-wide significant loci associated with plasma galectin-3: LGALS3 (rs2274273) and ABO (rs644234).
- The LGALS3 locus explained 25.6% and the ABO locus explained 3.8% of the variance, jointly accounting for 29.2%.
- SNPs rs4644 and rs4652, in high linkage disequilibrium with rs2274273, showed strong associations with galectin-3 levels and LGALS3 gene expression.
Conclusions:
- The LGALS3 and ABO genes are major determinants of plasma galectin-3 levels.
- Further functional studies are warranted to validate the origins of these genetic associations.
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