ASSOCIATION BETWEEN HIGH SERUM TOTAL IGE LEVELS AND D11S97 ON CHROMOSOME 11Q13 IN JAPANESE SUBJECTS

被引:32
作者
HIZAWA, N
YAMAGUCHI, E
FURUYA, K
OHNUMA, N
KODAMA, N
KOJIMA, J
OHE, M
KAWAKAMI, Y
机构
[1] First Department of Medicine, School of Medicine, Hokkaido University, Kita-Ku, Sapporo 060
关键词
D O I
10.1136/jmg.32.5.363
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
The genetic linkage of atopy to chromosome 11q13 through maternally derived alleles has been previously reported. Linkage analysis in Japanese families did not confirm the existence of a major gene for atopy at this locus under the model of autosomal dominant inheritance. However, we observed a significant association between serum total IgE levels and genetic markers at this locus both in 14 Japanese atopic families and in 120 unrelated Japanese subjects. We detected eight alleles at the D11S97 locus and eight alleles in the CA/GT repeat region in the fifth intron of the Fc epsilon RI beta gene. A significantly increased frequency of the D11S97/PstI 0.96 kb allele was observed in the chromosomes of the subjects with high serum total IgE levels both in the family study (p<0.001) and in the population study (p<0.05). However, multipoint linkage analysis again did not show any evidence for the existence of a major gene regulating atopy on chromosome 11q13 with location scores to -35 under the model of maternal inheritance. Evidence against linkage was confirmed by the non-parametric linkage analysis, using the affected pedigree member method. Also, there was no substitution of isoleucine for leucine in the fourth transmembrane domain of Fc epsilon RI beta (Leu181), which was reported to be responsible for a subset of atopy in the British population. Therefore, the association of serum total IgE levels with chromosome 11q13 indicates that a gene or genes at this locus may contribute to the expression of high IgE levels in the Japanese population as well as in the British population, but the heterogeneity of the genetic regulation of serum total IgE levels is evident between the two populations.
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页码:363 / 369
页数:7
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