title: Mite allergy, clinical atopy, and restriction by HLA class II immune response genes.
abstract: From a community-based study cohort of 1812 elementary schoolchildren we selected 129 unrelated participants to investigate the relevance of HLA-class II molecules (DPB, DQB, and DRB) to the regulation of immune response to the mite allergen Der p 1 and to clinical atopic disorders. On the basis of skin prick test results validated by measurement of specific IgE, individuals were selected and divided into three groups: group I (n = 20), controls without detectable specific IgE to common inhalant allergens; group II (n = 22), children sensitized only to non-mite allergens; group III (n = 85), children sensitized to Der p 1. Clinical history of asthma, eczema, and hay fever was ascertained using standardized questionnaires. In total, 43 different HLA class II alleles (DPB, n = 19; DQB, n = 14; and DRB, n = 10) were determined by sequence-specific oligonucleotide typing with PCR-amplified DNA. We were not able to demonstrate significant differences in gene frequencies of any HLA class II allele between the group of mite-sensitized children and one of the other two groups. However, the presence of certain DRB- and DPB-haplotypes (DRB *0100/*0300/*1100 and DPB *0201/*0401) was significantly associated (p < or = 0.01) with a history of asthma, hay fever, and atopy (defined as a history of asthma and/or hay fever and/or eczema). Other haplotypes, including DQB *0303/*0503, DRB *0200/ *0700, and DPB 0402 were negatively associated with a history of eczema, hay fever, and atopy (p < or = 0.01). Thus, our findings do not suggest a relevance of HLA-class II molecules to mite allergy; however, some HLA class II haplotypes appear to be predictive of the incidence of atopic disorders.
authors.affiliation: Department of Pediatrics, Heinrich-Heine University, Düsseldorf, Germany.
authors.forename: V
authors.initials: V
authors.lastname: Stephan
authors.forename: V
authors.initials: V
authors.lastname: Schmid
authors.forename: T
authors.initials: T
authors.lastname: Frischer
authors.forename: S
authors.initials: S
authors.lastname: Sparholt
authors.forename: J
authors.initials: J
authors.lastname: Forster
authors.forename: V
authors.initials: V
authors.lastname: Wahn
authors.forename: J
authors.initials: J
authors.lastname: Kuehr
mesh_terms: D000485:Allergens / Q000276:immunology*; D000818:Animals; D039741:Antigens, Dermatophagoides; D002648:Child; D005787:Gene Frequency; D006023:Glycoproteins / Q000276:immunology*; D006681:HLA-D Antigens / Q000235:genetics*; D006682:HLA-DP Antigens / Q000235:genetics; D006683:HLA-DQ Antigens / Q000235:genetics; D006684:HLA-DR Antigens / Q000235:genetics; D006801:Humans; D006969:Hypersensitivity, Immediate / Q000235:genetics*; D007073:Immunoglobulin E / Q000276:immunology; D008925:Mites
chemical_list: D000485:Allergens; D039741:Antigens, Dermatophagoides; D006023:Glycoproteins; D006681:HLA-D Antigens; D006682:HLA-DP Antigens; D006683:HLA-DQ Antigens; D006684:HLA-DR Antigens; D007073:Immunoglobulin E