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Related Experiment Videos

Rh E/e genotyping by allele-specific primer amplification

B H Faas1, S Simsek, P M Bleeker

  • 1Central Laboratory of the Netherlands Red Cross Blood Transfusion Service, Amsterdam.

Blood
|February 1, 1995
PubMed
Summary

A new allele-specific primer amplification (ASPA) method accurately determines Rhesus (Rh) E and e genotypes. This reliable technique aids in Rh E/e genotyping for fetuses and individuals lacking red blood cells.

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Area of Science:

  • Genetics
  • Immunology
  • Molecular Biology

Background:

  • The Rhesus (Rh) blood group system involves two homologous genes: Rh D and Rh CcEe.
  • The Rh CcEe gene encodes Rh C, c, E, and e polypeptides, with a single nucleotide difference distinguishing Rh E and Rh e alleles.
  • This C-->G transition at nucleotide 676 results in a proline to alanine substitution in the Rh e polypeptide.

Purpose of the Study:

  • To develop and validate an allele-specific primer amplification (ASPA) method for determining Rh E and Rh e genotypes.
  • To assess the reliability and utility of ASPA for Rh E/e genotyping.

Main Methods:

  • Developed an allele-specific primer amplification (ASPA) assay using specific primers targeting the C/G polymorphism at nucleotide position 676.
  • Conducted polymerase chain reactions with primers designed for Rh E and Rh e alleles, including primers for the Rh D and Rh CcEe genes.

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  • Tested DNA samples from 158 normal donors, including diverse ethnic backgrounds and rare Rh phenotypes.

    • Main Results:

    • The ASPA method demonstrated full concordance with established serologic Rh E/e phenotyping results.
    • The assay successfully differentiated between Rh E and Rh e genotypes based on the targeted nucleotide polymorphism.
    • The study confirmed the association between the cytosine/guanine polymorphism at position 676 and the Rh E/e phenotype.

    Conclusions:

    • The allele-specific primer amplification (ASPA) approach provides a simple, reliable, and accurate method for Rh E/e genotyping.
    • This molecular method is valuable for prenatal Rh E/e genotyping and for cases where serologic typing is not feasible.
    • The findings validate the use of molecular techniques for precise Rh blood group antigen determination.