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  • Title: Rapid genetic screening for major human leukocyte antigen risk haplotypes in patients with type 1 diabetes from Northeastern Brazil.
    Author: Brandao LC, Vatta S, Guimaraes R, Segat L, Araujo J, De Lima Filho JL, Arraes LC, Not T, Crovella S.
    Journal: Hum Immunol; 2010 Mar; 71(3):277-80. PubMed ID: 20035815.
    Abstract:
    The aim of this study was to identify in the Brazilian population the frequency of human leukocyte antigen (HLA) DQ2.5 and DQ8 haplotypes conferring risk for type 1 diabetes (T1D), and to validate a new genotyping method aimed at cost reduction and automation. A total of 184 children and adolescents with T1D and 184 healthy individuals from Recife (northeastern Brazil) were analyzed using the conventional polymerase chain reaction-sequence-specific primers HLA genotyping and a newly described Tag-single-nucleotide polymorphism real-time polymerase chain reaction. The Tag-single-nucleotide polymorphism-based HLA genotyping method was successfully validated, proved to be robust, with limited cost and thus could be successfully used for the identification of genetic susceptibility for T1D in areas with limited financial resources. Our findings report for the first time the distribution of DQ2.5 and DQ8 HLA risk haplotypes associated with T1D in northeastern Brazil and evidence a major risk for developing T1D when the heterozygous DQ2.5/DQ8 or the homozygous DQ2.5/DQ2.5 haplotypes are present.
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