STATE-OF-THE-ART PAPER
Genetic Approaches to Coronary Heart Disease
Jonathan C. Cohen, PhD*
Center for Human Nutrition and McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas
Manuscript received November 29, 2005;
revised manuscript received May 22, 2006,
accepted June 20, 2006.
* Reprint requests and correspondence: Dr. Jonathan C. Cohen, Center for Human Nutrition, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390. (Email: jonathan.cohen{at}utsouthwestern.edu).
Developments in high-throughput genotyping have progressed to the point where genome-wide association studies are becoming practical. Multistage designs involving large numbers of sequence variants ( 300,000) and relatively large samples sizes (several hundred cases and control subjects) will be essential to reliably detect alleles with appreciable effect sizes (2-fold increase in relative risk). Direct sequencing of candidate genes in cases and control subjects provides an alternative approach that can reveal low-frequency alleles that influence disease susceptibility. Ultimately, the outcome of both approaches will depend on the genetic architecture of coronary heart disease.
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Abbreviations and Acronyms
| | CHD = coronary heart disease | | LDL-C = low-density lipoprotein cholesterol | | SNP = single nucleotide polymorphism |
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