• Media type: E-Article
  • Title: Genome-Wide Association Analysis of High-Density Lipoprotein Cholesterol in the Population-Based KORA Study Sheds New Light on Intergenic Regions
  • Contributor: Heid, Iris M.; Boes, Eva; Müller, Martina; Kollerits, Barbara; Lamina, Claudia; Coassin, Stefan; Gieger, Christian; Döring, Angela; Klopp, Norman; Frikke-Schmidt, Ruth; Tybj�rg-Hansen, Anne; Brandstätter, Anita; Luchner, Andreas; Meitinger, Thomas; Wichmann, H.-Erich; Kronenberg, Florian
  • imprint: Ovid Technologies (Wolters Kluwer Health), 2008
  • Published in: Circulation: Cardiovascular Genetics
  • Language: English
  • DOI: 10.1161/circgenetics.108.776708
  • ISSN: 1942-3268; 1942-325X
  • Keywords: Genetics (clinical) ; Cardiology and Cardiovascular Medicine ; Genetics
  • Origination:
  • Footnote:
  • Description: <jats:p> <jats:bold> <jats:italic>Background—</jats:italic> </jats:bold> High-density lipoprotein cholesterol (HDLC) is a strong risk factor for atherosclerosis and is assumed to be under considerable genetic control. We aimed to identify gene regions that influence HDLC levels by a genome-wide association analysis in the population-based KORA (Cooperative Health Research in the Region of Augsburg) study. </jats:p> <jats:p> <jats:bold> <jats:italic>Methods and Results—</jats:italic> </jats:bold> In KORA S3/F3 (n=1643), we analyzed 377 865 quality-checked single-nucleotide polymorphisms (SNPs; 500K, Affymetrix, Santa Clara, Calif), complemented by the publicly available genome-wide association results from the Diabetes Genetics Initiative (n=2631) and by replication data from KORA S4 (n=4037) and the Copenhagen City Heart Study (n=9205). Among the 13 SNPs selected from the KORA S3/F3 500K probability value list, 3 showed consistent associations in subsequent replications: 1 SNP 10 kb upstream of <jats:italic>CETP</jats:italic> (pooled probability value=8.5�10 <jats:sup>−27</jats:sup> ), 1 SNP approximately 40 kb downstream of <jats:italic>LIPG</jats:italic> (probability value=4.67�10 <jats:sup>−10</jats:sup> ), both independent of previously reported SNPs, and 1 from an already reported region of <jats:italic>LPL</jats:italic> (probability value=2.82�10 <jats:sup>−11</jats:sup> ). Bioinformatical analyses indicate a potential functional relevance of the respective SNPs. </jats:p> <jats:p> <jats:bold> <jats:italic>Conclusions—</jats:italic> </jats:bold> The present genome-wide association study identified 2 interesting HDLC-relevant regions upstream of <jats:italic>CETP</jats:italic> and downstream of <jats:italic>LIPG</jats:italic> . This draws attention to the importance of long-range effects of intergenic regions, which have been underestimated so far, and may impact future candidate-gene–association studies toward extending the region analyzed. Furthermore, the present study reinforced <jats:italic>CETP</jats:italic> and <jats:italic>LPL</jats:italic> as HDLC genes and thereby underscores the power of this type of genome-wide association approach to pinpoint associations of common polymorphisms with effects explaining as little as 0.5% of the HDLC variance in the general population. </jats:p>
  • Access State: Open Access