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Related Experiment Videos

Reproductive failure and the major histocompatibility complex

K Jin1, H N Ho, T P Speed

  • 1Department of Family Medicine, University of Pittsburgh School of Medicine, PA 15261, USA.

American Journal of Human Genetics
|June 1, 1995
PubMed
Summary

Couples with recurrent spontaneous abortion (RSA) showed increased Human Leukocyte Antigen (HLA) DR sharing. Unexplained infertility cases resistant to in vitro fertilization (IVF) had elevated HLA DQ sharing, suggesting specific MHC regions impact reproduction.

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Area of Science:

  • Immunogenetics
  • Reproductive Medicine
  • Human Leukocyte Antigen (HLA) System

Background:

  • Recurrent spontaneous abortion (RSA) and unexplained infertility are significant reproductive challenges.
  • The Major Histocompatibility Complex (MHC) and its Human Leukocyte Antigen (HLA) genes are implicated in reproductive outcomes.
  • Previous studies suggest HLA sharing may influence reproductive defects, but precise associations require further investigation.

Purpose of the Study:

  • To investigate the association between HLA sharing and recurrent spontaneous abortion (RSA).
  • To examine the relationship between HLA sharing and the success of in vitro fertilization (IVF) for unexplained infertility.
  • To identify specific regions of the MHC influencing reproductive defects using a novel shared-allele test.

Main Methods:

Related Experiment Videos

  • A new shared-allele test was developed and applied to 123 couples with RSA and 76 couples with unexplained infertility undergoing IVF.
  • Statistical analysis included a corrected homogeneity test and a bootstrap approach to compare HLA allele frequencies (HLA-A, HLA-B, HLA-DR, HLA-DQ).
  • Allele frequencies were compared between patient groups and a control group.

Main Results:

  • A significant excess of HLA-DR sharing was observed in couples with RSA.
  • A significant excess of HLA-DQ sharing was found in couples with unexplained infertility who did not respond to IVF treatment.
  • No statistically significant differences in allele frequencies were found among the patient groups and the control group for HLA-A and HLA-B loci.

Conclusions:

  • Genes in different segments of the MHC class II region appear to influence distinct aspects of human reproduction.
  • The findings suggest that HLA antigen sharing itself is unlikely to be the sole mechanism behind reproductive defects.
  • The overlap between MHC genes influencing reproduction and those associated with autoimmune diseases may explain the comorbidity of reproductive and autoimmune conditions.