Genetic variants in <it>LPL</it>, <it>OASL </it>and <it>TOMM40/APOE-C1-C2-C4 </it>genes are associated with multiple cardiovascular-related traits

• Main Authors: Madden Pamela AF (Author), Heath Andrew C (Author), Henders Anjali K (Author), Ferreira Manuel AR (Author), Middelberg Rita PS (Author), Montgomery Grant W (Author), Martin Nicholas G (Author), Whitfield John B (Author)
• Format: Book
• Published: BMC, 2011-09-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 10.1186/1471-2350-12-123; 1471-2350
• Keywords: Internal medicine; RC31-1245; Genetics; QH426-470
• Source: BMC Medical Genetics, Vol 12, Iss 1, p 123 (2011)

<p>Abstract</p> <p>Background</p> <p>Genome-wide association studies (GWAS) have become a major strategy for genetic dissection of human complex diseases. Analysing multiple phenotypes jointly may improve both our ability to detect genetic variants with multiple effects and our understanding of their common features. Allelic associations for multiple biochemical traits (serum alanine aminotransferase, aspartate aminotransferase, butrylycholinesterase (BCHE), C-reactive protein (CRP), ferritin, gamma glutamyltransferase (GGT), glucose, high-density lipoprotein cholesterol (HDL), insulin, low-density lipoprotein cholesterol (LDL), triglycerides and uric acid), and body-mass index, were examined.</p> <p>Methods</p> <p>We aimed to identify common genetic variants affecting more than one of these traits using genome-wide association analysis in 2548 adolescents and 9145 adults from 4986 Australian twin families. Multivariate and univariate associations were performed.</p> <p>Results</p> <p>Multivariate analyses identified eight loci, and univariate association analyses confirmed two loci influencing more than one trait at p < 5 × 10^-8. These are located on chromosome 8 (<it>LPL </it>gene affecting HDL and triglycerides) and chromosome 19 (<it>TOMM40/APOE-C1-C2-C4 </it>gene cluster affecting LDL and CRP). A locus on chromosome 12 (<it>OASL </it>gene) showed effects on GGT, LDL and CRP. The loci on chromosomes 12 and 19 unexpectedly affected LDL cholesterol and CRP in opposite directions.</p> <p>Conclusions</p> <p>We identified three possible loci that may affect multiple traits and validated 17 previously-reported loci. Our study demonstrated the usefulness of examining multiple phenotypes jointly and highlights an anomalous effect on CRP, which is increasingly recognised as a marker of cardiovascular risk as well as of inflammation.</p>