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RhD genotype determination by single sperm cell analysis

B E Reubinoff1, R Avner, N Rojansky

  • 1Department of Obstetrics and Gynecology, Hadassah University Hospital, Ein-Kerem, Jerusalem, Israel.

American Journal of Obstetrics and Gynecology
|April 1, 1996
PubMed
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This study developed a precise method for RhD genotyping using single sperm cells and polymerase chain reaction. This technique accurately determines the RhD genotype, aiding in managing Rh isoimmunization.

Area of Science:

  • Genetics
  • Reproductive Medicine
  • Molecular Biology

Background:

  • RhD incompatibility can cause Rh isoimmunization, affecting Rh-negative mothers with Rh-positive fetuses.
  • Accurate RhD genotyping is crucial for managing pregnancies at risk of Rh isoimmunization.
  • Current methods for RhD genotyping lack reliability.

Purpose of the Study:

  • To develop an accurate method for RhD genotyping in men.
  • To enable precise determination of fetal RhD status through paternal genotyping.

Main Methods:

  • Single sperm cells were isolated using micromanipulation techniques.
  • Deoxyribonucleic acid (DNA) amplification of a D-specific sequence was performed using multiplex nested polymerase chain reaction (PCR).
  • RhD genotype was determined based on the amplification product in single sperm cells.

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Main Results:

  • RhD genotype was accurately determined in all 10 donors.
  • Analysis of 132 single sperm cells showed successful amplification in 96 samples.
  • The method correctly identified RhD genotypes in Rh-positive homozygotes, heterozygotes, and Rh-negative subjects.

Conclusions:

  • Single sperm cell analysis using PCR provides an accurate method for RhD genotyping.
  • This technique has significant potential clinical applications in managing Rh isoimmunization.
  • Accurate paternal RhD genotyping can inform clinical decisions in high-risk pregnancies.