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Rapid RHD Zygosity Determination Using Digital PCR.

Kelly A Sillence1, Amr J Halawani1, Wajnat A Tounsi1

  • 1School of Biomedical and Healthcare Sciences, Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth, UK.

Clinical Chemistry
|June 16, 2017
PubMed
Summary
This summary is machine-generated.

Digital PCR offers a reliable method for determining RHD zygosity, crucial for managing hemolytic disease of the fetus and newborn. This technique accurately distinguishes between homozygous and hemizygous RHD-positive individuals, improving upon current unreliable PCR methods.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Immunology

Background:

  • Paternal zygosity testing for RHD is vital for pregnancies at risk of hemolytic disease of the fetus and newborn.
  • Current methods like real-time PCR and Rhesus box PCR are often unreliable and difficult to interpret, especially in diverse populations.

Purpose of the Study:

  • To evaluate the efficacy of digital PCR for accurate RHD zygosity determination.
  • To compare digital PCR results with serological data and conventional genotyping methods.

Main Methods:

  • Digital PCR was employed to determine RHD gene dosage in 53 DNA samples against a reference gene (AGO1).
  • Results were cross-referenced with serological data.
  • Discordant results were further analyzed using long-range PCR, next-generation sequencing, and Sanger sequencing.

Main Results:

  • Digital PCR provided clear and reliable RHD zygosity determination.
  • Four samples showed discrepancies between digital PCR and serological predictions.
  • Advanced sequencing techniques confirmed the digital PCR findings for discordant samples, revealing complex RHD genotypes.

Conclusions:

  • Digital PCR is a highly accurate and rapid method for defining blood group zygosity.
  • This technique has significant clinical applications for Rh phenotyping and genotyping.
  • Digital PCR can reliably determine paternal RHD zygosity, aiding in the management of at-risk pregnancies and distinguishing RHD-positive individuals.