Genetic admixture and asthma-related phenotypes in Mexican American and Puerto Rican asthmatics

被引:139
作者
Salari, K
Choudhry, S
Tang, H
Naqvi, M
Lind, D
Avila, PC
Coyle, NE
Ung, N
Nazario, S
Casal, J
Torres-Palacios, A
Clark, S
Phong, A
Gomez, I
Matallana, H
Pérez-Stable, EJ
Shriver, MD
Kwok, PY
Sheppard, D
Rodriguez-Cintron, W
Risch, NJ
Burchard, EG [1 ]
Ziv, E
机构
[1] Univ Calif San Francisco, Dept Med, San Francisco, CA 94143 USA
[2] San Francisco Gen Hosp, Lung Biol Ctr, San Francisco, CA 94110 USA
[3] Fred Hutchinson Canc Res Ctr, Seattle, WA 98104 USA
[4] Univ Calif San Francisco, Inst Cardiovasc Res, San Francisco, CA 94143 USA
[5] Univ Puerto Rico, Sch Med, San Juan VAMC, San Juan, PR 00936 USA
[6] Penn State Univ, Dept Anthropol, University Pk, PA 16802 USA
[7] Stanford Univ, Sch Med, Dept Genet, Palo Alto, CA 94304 USA
[8] Kaiser Permanente, Div Res, Oakland, CA USA
关键词
admixture; asthma; Hispanics/Latinos;
D O I
10.1002/gepi.20079
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
Genetic association studies in admixed populations may be biased if individual ancestry varies within the population and the phenotype of interest is associated with ancestry. However, recently admixed populations also of fer potential benefits in association studies since markers informative for ancestry may be in linkage disequilibrium across large distances. In particular, the enhanced LD in admixed populations may be used to identify alleles that underlie a genetically determined difference in a phenotype between two ancestral populations. Asthma is known to have different prevalence and severity among ancestrally distinct populations. We investigated several asthma-related phenotypes in two ancestrally admixed populations: Mexican Americans and Puerto Ricans. We used ancestry informative markers to estimate the individual ancestry of 181 Mexican American asthmatics and 181 Puerto Rican asthmatics and tested whether individual ancestry is associated with any of these phenotypes independently of known environmental factors. We found an association between higher European ancestry and more severe asthma as measured by both forced expiratory volume at 1 second (r = -0.21, p = 0.005) and by a clinical assessment of severity among Mexican Americans (OR: 1.55; 95 %, Cl 1,25 to 1.93). We found no significant associations between ancestry and severity or drug responsiveness among Puerto Ricans These results suggest that asthma severity may be influenced by genetic factors differentiating Europeans and Native Americans in Mexican Americans, although differing results for Puerto Ricans require further investigation. (c) 2005 Wiley-Liss, Inc.
引用
收藏
页码:76 / 86
页数:11
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