Abstract:
:Childhood-onset asthma is frequently found in association with atopy. Although asthmatic children may develop IgE antibodies against variety of allergens, asthma is associated primarily with allergy to house-dust mites, molds, or other allergens. In this study, we conducted a genome-wide linkage search in 47 Japanese families (197 members) with more than two mite-sensitive atopic asthmatics (65 affected sib-pairs) using 398 markers. Multipoint linkage analysis was carried out for atopic asthma as a qualitative trait using the MAPMAKER/SIB program. We observed significant evidence for linkage with maximum lod scores (MLS) of 4.8 near the interleukin 12 B gene locus on chromosome 5q31-q33. In addition, suggestive evidence on 4q35 with MLS = 2.7 and on 13q11 with MLS = 2.4 was obtained. The other possible linkage regions included 6p22-p21.3 (MLS = 2.1), 12q21-q23 (MLS = 1.9), and 13q14.1-q14.3 (MLS = 2.0). Many of the linkage loci suggested in this study were at or close to those suggested by genome-wide studies for asthma in Caucasian populations. The present study suggests the contribution of the interleukin 12 B gene or nearby gene(s) to mite-sensitive atopic asthma and a considerable number of genetic variants common across Caucasians and Japanese populations contributing to asthma, although the relative importance of various variants may differ between the groups.
journal_name
Genomicsjournal_title
Genomicsauthors
Yokouchi Y,Nukaga Y,Shibasaki M,Noguchi E,Kimura K,Ito S,Nishihara M,Yamakawa-Kobayashi K,Takeda K,Imoto N,Ichikawa K,Matsui A,Hamaguchi H,Arinami Tdoi
10.1006/geno.2000.6201subject
Has Abstractpub_date
2000-06-01 00:00:00pages
152-60issue
2eissn
0888-7543issn
1089-8646pii
S0888-7543(00)96201-3journal_volume
66pub_type
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