title: TNFa-e microsatellite, HLA-DRB1 and -DQB1 alleles and haplotypes in Brazilian patients presenting recently diagnosed type 1 diabetes mellitus.
abstract: TNF microsatellite and HLA class II polymorphisms were studied in 28 recently diagnosed Brazilian patients presenting type 1 diabetes mellitus (T1DM) and in 120 healthy controls. TNFa-e and HLA-DRB1/DQB1 alleles were identified using sets of sequence-specific primers. Compared to controls, the DRB1*03 and DQB1*02 allele groups, TNFa1 allele, and the TNFa4-b5-c1-d4-e3 and TNFa10-b5-c1-d4-e3 haplotypes were overrepresented in patients. TNF microsatellite together with HLA polymorphisms is associated with type 1 diabetes in Brazilian patients, corroborating the participation of the MHC genes in disease susceptibility.
authors.affiliation: Division of Clinical Immunology, School of Medicine of Ribeirão Preto, University of São Paulo. Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil.
authors.forename: Diane M
authors.initials: DM
authors.lastname: Rassi
authors.forename: Isabela J
authors.initials: IJ
authors.lastname: Wastowski
authors.forename: Renata T
authors.initials: RT
authors.lastname: Simões
authors.forename: Sandra
authors.initials: S
authors.lastname: Rodrigues
authors.forename: Neife N H S
authors.initials: NN
authors.lastname: Deghaide
authors.forename: Celso T
authors.initials: CT
authors.lastname: Mendes-Junior
authors.forename: Aguinaldo L
authors.initials: AL
authors.lastname: Simões
authors.forename: C P
authors.initials: CP
authors.lastname: Soares
authors.forename: Geraldo A S
authors.initials: GA
authors.lastname: Passos
authors.forename: Eduardo A
authors.initials: EA
authors.lastname: Donadi
mesh_terms: D000293:Adolescent; D000483:Alleles; D001938:Brazil / Q000453:epidemiology; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D003922:Diabetes Mellitus, Type 1 / Q000175:diagnosis / Q000453:epidemiology / Q000235:genetics* / Q000276:immunology*; D005260:Female; D005787:Gene Frequency; D006680:HLA Antigens / Q000235:genetics*; D006683:HLA-DQ Antigens / Q000235:genetics; D006684:HLA-DR Antigens / Q000235:genetics; D059811:HLA-DRB1 Chains; D006239:Haplotypes; D006801:Humans; D008297:Male; D018895:Microsatellite Repeats; D011110:Polymorphism, Genetic; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics*
chemical_list: D006680:HLA Antigens; D006683:HLA-DQ Antigens; D006684:HLA-DR Antigens; D059811:HLA-DRB1 Chains; D014409:Tumor Necrosis Factor-alpha