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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
Summary
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.
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.