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Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.
HLA-DQA1 and HLA-DQB1 haplotypes in aborted fetuses and couples with recurrent spontaneous abortion.
Journal of Reproductive Immunology 1995 July
HLA haplotypes may be associated with spontaneous abortion through a variety of mechanisms, including maternal hyporesponsiveness to fetal alloantigens, maternal autoimmunity, and HLA-linked t-locus homologues. HLA-DQA1 and HLA-DQB1 haplotypes were determined in 37 couples with a history of recurrent spontaneous abortion (RSAB), 40 of their abortuses, and 20 fertile control couples. The distribution of haplotype frequencies did not differ between control subjects and RSAB wives, RSAB husbands, or abortuses. The frequency of the HLA-DR5-linked haplotype, DQA1*501/DQB1*301, which was considered a marker for immune hyporesponsiveness, did not differ between RSAB wives and control subjects (P = 0.353). The frequency of the autoimmune-associated HLA-DR3-linked haplotype, DQA1*0501/DQB1*0201, did not differ significantly between RSAB wives and control subjects (P = 0.103). The frequency of the DQA1*0201/DQB1*0201 haplotype in RSAB husbands was greater than the 95th percentile confidence limit of the frequency of this haplotype in control subjects. Among seven RSAB husbands who were heterozygous for this haplotype and did not share a DQA1*0201 allele with his wife, the haplotype was transmitted to 6 of 7 abortuses (3.5 expected). Although the small size of this sample precludes drawing conclusions regarding HLA transmission biases in RSAB couples, these data have generated a specific hypothesis regarding the DQA1*0201/DQB1*0201 haplotype that can be investigated in future studies.
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