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Genome-wide screen for asthma in Puerto Ricans: evidence for association with 5q23 region

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Abstract

While the number of success stories for mapping genes associated with complex diseases using genome-wide association approaches is growing, there is still much work to be done in developing methods for such studies when the samples are collected from a population, which may not be homogeneous. Here we report the first genome-wide association study to identify genes associated with asthma in an admixed population. We genotyped 96 Puerto Rican moderate to severe asthma cases and 88 controls as well as 109 samples representing Puerto Rico’s founding populations using the Affymetrix GeneChip Human Mapping 100K array sets. The data from samples representing Puerto Rico’s founding populations was used to identify ancestry informative markers for admixture mapping analyses. In addition, a genome-wide association analysis using logistic regression was performed on the data. Although neither admixture mapping nor regression analysis gave any significant association with asthma after correction for multiple testing, an overlap analysis using the top scoring SNPs from different methods suggested chromosomal regions 5q23.3 and 13q13.3 as potential regions harboring genes for asthma in Puerto Ricans. The validation analysis of these two regions in 284 Puerto Rican asthma trios gave significant association for the 5q23.3 region. Our results provide strong evidence that the previously linked 5q23 region is associated with asthma in Puerto Ricans. The detection of causative variants in this region will require fine mapping and functional validation.

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Acknowledgments

The authors would like to acknowledge the families and the patients for their participation. We would also like to thank the numerous health care providers and community clinics for their support and participation in the GALA Study. Finally, we would like to especially thank Jeffrey M. Drazen, M.D., Scott Weiss, M.D., Ed Silverman, M.D., Ph.D., Homer A. Boushey, M.D., Jean G. Ford, M.D. and Dean Sheppard, M.D. for all of their effort towards the creation of the GALA Study. This work was supported by National Institutes of Health (HL078885), RWJ Amos Medical Faculty Development Award, NCMHD Health Disparities Scholar, Extramural Clinical Research, Loan Repayment Program for Individuals from Disadvantaged Backgrounds, 2001–2003, to EGB), American Thoracic Society “Breakthrough Opportunities in Lung Disease” (BOLD) Award and Tobacco-Related Disease Research Program New Investigator Award (15KT-0008) to SC, and the Sandler Center for Basic Research in Asthma, the Sandler Family Supporting Foundation and the Flight Attendant Medical Research Institute (FAMRI).

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Correspondence to Shweta Choudhry.

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S. Choudhry and M. Taub contributed equally to the manuscript.

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Choudhry, S., Taub, M., Mei, R. et al. Genome-wide screen for asthma in Puerto Ricans: evidence for association with 5q23 region. Hum Genet 123, 455–468 (2008). https://doi.org/10.1007/s00439-008-0495-7

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  • DOI: https://doi.org/10.1007/s00439-008-0495-7

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