RESUMO
<p><b>OBJECTIVE</b>To investigate the polymorphisms of HLA-DPA1 and HLA-DPB1 loci of Han population in Zhejiang province of China.</p><p><b>METHODS</b>The alleles of HLA-DPA1 and HLA-DPB1 loci in 100 unrelated healthy individuals were analyzed using polymerase chain reaction-sequence based typing.</p><p><b>RESULTS</b>Eight HLA-DPA1 alleles and 19 HLA-DPB1 alleles were found in the population. The HLA-DPA1 alleles with higher frequencies were DPA1*020202 (47.0%), DPA1*010301 (38.5%) and DPA1*020101(10.5%). The HLA-DPB1 alleles with higher frequencies were DPB1*0501, DPB1*020102 and DPB1*040101. The frequencies were 39.5%, 13.5% and 13.0%, respectively. A total of 44 estimated DPA1-DPB1 haplotypes were detected. The HLA-DPA1*020202-DPB1*0501(29.5%) was the most frequent haplotype.</p><p><b>CONCLUSION</b>The polymorphism data of the HLA-DPA1 and -DPB1 were obtained in Han population in Zhejiang province of China. There was linkage disequilibrium between the two loci.</p>
Assuntos
Feminino , Humanos , Masculino , Povo Asiático , Etnologia , Genética , China , Etnologia , Bases de Dados Genéticas , Etnicidade , Genética , Frequência do Gene , Loci Gênicos , Genética , Antígenos HLA-DP , Genética , Cadeias alfa de HLA-DP , Cadeias beta de HLA-DP , Haplótipos , Desequilíbrio de Ligação , Reação em Cadeia da Polimerase , Polimorfismo GenéticoRESUMO
The aim of study was to confirm the novel HLA allele HLA-B*3936 in Chinese population and to analyze its sequence. The proband was a cord blood donor in the Zhejiang province. DNA was extracted from whole blood by PEL-FREEZ DNA extraction kit. The amplification of HLA-B exons 2 - 4 of the proband was performed by allele specific primer PCR and the amplified product was sequenced bidirectionally with primers. The sequencing results showed HLA-B alleles of the proband as B*4002 and the novel allele. The sequences of the novel allele have been submitted to GenBank (DQ242650, DQ242651, DQ242652). After Blast HLA analysis, the novel allele showed four nucleotide differences with HLA-B*3901 at nucleotide position 527 T-->A, 538 C-->T, 539 T-->G, 544 A-->G in exon 3. It resulted in three amino acid change from Val to Glu at codon 152, Ile to Trp at codon 156, Thr to Ala at codon 158. The result suggested that this allele is a novel allele and has been officially named HLA-B*3936 by the WHO Nomenclature Committee.
