title: Association between genetic variations of the transforming growth factor ß receptor type III and asthma in a Korean population.
abstract: Transforming growth factor-beta (TGF-ß) and its receptors have been suggested to play key roles in the pathogenesis of asthma. The aim of this study was to evaluate the effects of genetic variations in the TGF-ß receptor type III (TGFBR3) on asthma and on its related phenotypes in the general population. A cohort of 2,118 subjects aged from 10 to 18 years responded to a questionnaire concerning asthma symptoms and risk factors. Methacholine airway hyperresponsiveness (AHR), skin test responses to common aeroallergens, and serum total IgE levels were evaluated in the cohort. A total of 19 SNPs for TGFBR3 were found using direct re-sequencing in 24 healthy adults. Of these, informative SNPs [+44T>C (S15F) and +2753G>A at 3'UTR] were selected and scored using the high throughput single base extension method. Atopy was identified in subjects with 44T>C allele [P=0.04, OR (95% CI)=0.79 (0.62-0.99)] and in subjects with Ht1 (CG) more frequently than in subjects with other haplotypes [P=0.04, OR (95% CI)=1.27 (1.01-1.59)]. The A allele in 2753G>A was more common in subjects with non-atopic asthma [OR (95% CI)=1.76 (1.01-3.05)]. A significant association was found between non-atopic asthma and 44T_2753A [OR (95% CI) =2.16 (1.22-3.82)]. Genetic variations in TGFBR3 appear to be associated with a genetic predisposition to development of asthma and to phenotypes of asthma. Also, the minor allele 2753G and the haplotype TA in the TGFBR3 gene were associated with a pathogenesis of non-atopic asthma.
authors.affiliation: Department of Internal Medicine, Kosin University College of Medicine, Busan 602-702, Korea. naum67@naver.com
authors.forename: Hee-Kyoo
authors.initials: HK
authors.lastname: Kim
authors.forename: Tae-Won
authors.initials: TW
authors.lastname: Jang
authors.forename: Mann-Hong
authors.initials: MH
authors.lastname: Jung
authors.forename: Heung-Woo
authors.initials: HW
authors.lastname: Park
authors.forename: Jong-Eun
authors.initials: JE
authors.lastname: Lee
authors.forename: Eun-Soon
authors.initials: ES
authors.lastname: Shin
authors.forename: Sang-Heon
authors.initials: SH
authors.lastname: Cho
authors.forename: Kyung-Up
authors.initials: KU
authors.lastname: Min
authors.forename: You-Young
authors.initials: YY
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D044466:Asian People / Q000235:genetics*; D001249:Asthma / Q000208:ethnology / Q000235:genetics* / Q000276:immunology; D016022:Case-Control Studies; D002648:Child; D015331:Cohort Studies; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D014644:Genetic Variation / Q000502:physiology; D005828:Genetics, Population; D055106:Genome-Wide Association Study; D005838:Genotype; D006801:Humans; D007073:Immunoglobulin E / Q000276:immunology; D015810:Linkage Disequilibrium; D008297:Male; D011509:Proteoglycans / Q000235:genetics*; D018125:Receptors, Transforming Growth Factor beta / Q000235:genetics*
chemical_list: D011509:Proteoglycans; D018125:Receptors, Transforming Growth Factor beta; C071736:betaglycan; D007073:Immunoglobulin E
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