Genetic loci for blood lipid levels identified by linkage and association analyses in Caribbean Hispanics

Chuanhui Dong, Ashley Beecham, Liyong Wang, Susan Slifer, Clinton B. Wright, Susan H. Blanton, Tatjana Rundek, Ralph L. Sacco

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

To identify genetic loci influencing blood lipid levels in Caribbean Hispanics, we first conducted a genomewide linkage scan in 1,211 subjects from 100 Dominican families on five lipid quantitative traits: total cholesterol (TC), low density lipoprotein cholesterol (LDL-C), high density lipoprotein cholesterol (HDL-C), triglycerides (TG), and LDL-C/HDL-C ratio. We then investigated the association between blood lipid levels and 21,361 single nucleotide polymorphisms (SNP) under the 1-logarithm of odds (LOD) unit down regions of linkage peaks in an independent community-based subcohort (N = 814, 42% Dominican) from the Northern Manhattan Study (NOMAS). We found signifi-cant linkage evidence for LDL-C/HDL-C on 7p12 (multipoint LOD = 3.91) and for TC on 16q23 (LOD = 3.35). In addition, we identified suggestive linkage evidence of LOD > 2.0 on 15q23 for TG, 16q23 for LDL-C, 19q12 for TC and LDL-C, and 20p12 for LDL-C. In the association analysis of the linkage peaks, we found that seven SNPs near FLJ45974 were associated with LDL-C/HDL-C with a nominal P < 3.5 × 10-5, in addition to associations ( P < 0.0001) for other lipid traits with SNPs in or near CDH13, SUMF2, TLE3, FAH, ARNT2, TSHZ3, ZNF343, RPL7AL2, and TMC3. Further studies are warranted to perform in-depth investigations of functional genetic variants in these regions.

Original languageEnglish (US)
Pages (from-to)1411-1419
Number of pages9
JournalJournal of Lipid Research
Volume52
Issue number7
DOIs
StatePublished - Jul 2011

Keywords

  • Genetics
  • Heritability
  • Single nucleotide polymorphism

ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology
  • Endocrinology

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