Associations between HLA-DQB1 high-risk alleles and type I diabetes do not depend on cytomegalovirus antibody status at onset: a case-parent study conducted in Chile.
Immunol Cell Biol
; 78(3): 259-63, 2000 Jun.
Article
em En
| MEDLINE
| ID: mdl-10849114
ABSTRACT
The purpose of the present study is to ascertain whether the associations between HLA-DQB1*0201 and DQB1*0302 alleles and childhood diabetes depend on the presence of antibodies to human cytomegalovirus (CMV). A study of incident type I diabetes cases and parents was conducted in Santiago, Chile. HLA-DQB1 polymorphisms were determined in 85 case-parent trios (255 subjects), while the detection of CMV was carried out only in the incident cases. As expected, HLA-DQB1 polymorphisms are strongly associated with type I diabetes, with crude odds ratios of 3.7 (95% confidence interval (CI) 1.8-7.7) for the DQB1*0201 allele and 10.3 (95% CI 5.0-21.4) for the DQB1*0302 allele. In the subset of families with CMV+ cases, the odds ratios were estimated as 3.7 (95% CI 1.6-8.6) for the DQB1*0201 allele and 11.1 (95% CI 4.8-25.8) for the DQB1*0302 allele. In families with patients who tested negative for CMV antibodies, the odds ratios were calculated as 3.5 (95% CI 0.7-16.8) for the DQB1*0201 allele, and 8.0 (95% CI 1.8-34.7) for the DQB1*0302 allele. There was no evidence of statistical interaction between CMV antibodies and the DQB1*0201 allele (P value = 0.9) or the DQB1*0302 allele (P value = 0.7). In conclusion, alleles DQB1*0302 and DQB1*0201 do not display distinct associations with type I diabetes depending on the presence of antibodies for CMV.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Etiology_studies
/
Incidence_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Adolescent
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Child
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Child, preschool
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Female
/
Humans
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Infant
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Male
País/Região como assunto:
America do sul
/
Chile
Idioma:
En
Ano de publicação:
2000
Tipo de documento:
Article