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PLT antigen discrepancy pattern among couples with recurrent abortion.

Ghazal Ahmadzadeh Shad1, Ali Ghasemi2, Maryam Zadsar3

  • 1Iranian Blood Transfusion Organization Research Center, Tehran, Iran.

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|April 23, 2024
PubMed
Summary
This summary is machine-generated.

Human platelet antigen (HPA) polymorphisms, specifically HPA-3 and HPA-15, show common partial mismatches in Iranian couples experiencing recurrent pregnancy loss. Approximately half of these couples have differing HPA genes, suggesting a potential link to recurrent abortion.

Keywords:
antigensgynecologyhuman plateletpregnancyrecurrent abortion

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Area of Science:

  • Reproductive Immunology
  • Human Genetics
  • Obstetrics and Gynecology

Background:

  • Recurrent abortion (RA) affects couples with two or more consecutive miscarriages of unknown cause.
  • The role of human platelet antigen (HPA) polymorphisms in RA pathogenesis is not well-established.
  • Limited data exist on HPA polymorphisms in populations with high RA prevalence.

Purpose of the Study:

  • To investigate genetic variations in HPA-1, -2, -3, -5, and -15 among Iranian couples with a history of recurrent abortion.
  • To evaluate the frequency of HPA gene mismatches between partners in couples experiencing recurrent pregnancy loss.
  • To explore potential associations between HPA polymorphisms and recurrent abortion in the studied cohort.

Main Methods:

  • Cross-sectional study involving 74 Iranian couples with at least two unexplained recurrent abortions.
  • Human platelet antigen (HPA) polymorphisms genotyping performed using single-specific primer PCR.
  • Genotype frequencies calculated using the Hardy-Weinberg equation to assess population genetics.

Main Results:

  • Partial mismatches in HPA genotyping were observed in 52.7% of couples.
  • The most frequent partial mismatches involved HPA-15a/HPA-15b (4%), HPA-3a (2.7%), HPA-2b (1.3%), and HPA-5b (1.3%).
  • Deviations from Hardy-Weinberg equilibrium were noted in the HPA-2 and HPA-5 systems.

Conclusions:

  • Partial mismatches in HPA-3 and HPA-15 genotypes are prevalent in Iranian couples with recurrent abortion.
  • Nearly half of the couples exhibited at least one HPA gene difference between partners.
  • Further research, including alloantibody investigations, is recommended to elucidate the association between HPA polymorphisms and recurrent abortion.