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Rev. bras. ginecol. obstet ; Rev. bras. ginecol. obstet;37(8): 347-352, ago. 2015. tab
Article in Portuguese | LILACS | ID: lil-756555

ABSTRACT

OBJETIVO:

Investigar a associação dos alelos HLA-A, -B e -DRB1 com a ocorrência de Aborto Espontâneo Recorrente.

MÉTODOS:

Estudo caso-controle com 200 mulheres com idade entre 18 e 35 anos, sendo a amostra de conveniência com 100 mulheres que tiveram aborto espontâneo recorrente idiopático e 100 mulheres sem aborto e com dois ou mais filhos. A obtenção do DNA Genômico foi de sangue periférico, sendo a extração realizada a partir de 500l do Buffy-Coat conservado a -20°C. A Tipificação HLA foi feita pelo método PCR-SSOP (Polymerase Chain Reaction - Specific Sequence of Oligonucleotides Probes, One Lambda(r), CA, EUA). As regiões do DNA amplificado foram o exon 2 e 3 para os lociA e B e apenas o exon 3 para o locus DRB1. Para determinação da genotipagem HLA-A, HLA-B e HLA-DRB1, utilizou-se o programa HLA FUSIONTM(One Lambda, Canoga Park, CA, United States, 3.0 version). Na análise estatística, utilizaram-se frequências absolutas e porcentagens, e cálculo de média e desvio padrão. As variáveis qualitativas foram comparadas utilizando-se o teste χ2, com correção de Yates, ou Teste Exato de Fisher. Para as comparações e significância (p<0,05), foi calculado Odds Ratio com IC95%.

RESULTADOS:

O alelo A*34 apresentou frequência significativamente maior no grupo caso em relação ao controle (4,0 versus0,5%; p<0,05). Os alelos A*24 (6,0 versus12,5%; p<0,05) e B*35 (8,0 versus20,5%; p<0,05) foram significativamente menos frequentes no grupo caso. Entre os alelos de classe II, o DRB1*03 apresentou frequência ligeiramente maior no grupo caso (11,0 versus5,5%; p=0,056).

CONCLUSÕES:

Foi demonstrado que o alelo HLA-A*34 é fator de risco para o abortamento ...


PURPOSE:

To investigate the association of the HLA-A, -B and -DRB1 alleles with the occurrence of Recurrent Spontaneous Abortion.

METHODS:

A case-control study of 200 women aged 18 to 35 years, consisting of a convenience sample of 100 women who had idiopathic recurrent spontaneous abortion and 100 women without abortion and with two or more children. Peripheral blood genomic DNA was extracted from 500l of Buffy Coat stored at -20°C. HLA typing was performed by the PCR-SSOP method (Polymerase Chain Reaction - Specific Sequence of Oligonucleotides Probes, One Lambda(r), CA, USA). The regions of the amplified DNA were exon 2 and 3 for the A and B loci and only exon 3 for the DRB1 locus. The HLA FUSIONTM program (One Lambda, Canoga Park, CA, USA, version 3.0) was used for HLA-A, HLA-B and HLA-DRB1 genotyping. Absolute frequencies and percentages and calculation of mean and standard deviation were used for standard statistical analysis. The qualitative variables were compared by the χ2 test with Yates correction or by Fisher's exact test. The odds ratio with the 95%CI was used for the comparisons, with the level of significance set at p<0.05.

RESULTS:

The frequency of the A*34 allele was significantly higher in the case group compared to control (4.0 versus0.5%; p<0.05). Alleles A*24 (6.0 versus12.5%; p<0.05) and B*35 (8.0 versus20.5%; p<0.05) were significantly less frequent in the case group. Among the class II alleles, DRB1*03 showed a slightly higher frequency in the case group (11.0 versus5.5%, p = 0.056).

CONCLUSIONS:

It was shown that the HLA-A*34 allele is a risk factor for recurrent spontaneous abortion, while the HLA-A*24 and HLA-B*35 alleles are associated with ...


Subject(s)
Humans , Female , Adolescent , Adult , Young Adult , Abortion, Habitual/genetics , Alleles , HLA-A Antigens/genetics , HLA-B Antigens/genetics , HLA-DRB1 Chains/genetics , Brazil , Case-Control Studies
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