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Related Experiment Videos

Non-invasive antenatal RHD typing.

C E Van der Schoot1, A Ait Soussan, J Koelewijn

  • 1Department of experimental immunohematology, Sanquin Research, 125, Plesmanlaan, 1066 CX Amsterdam, the Netherlands. e.vanderschoot@sanquin.nl

Transfusion Clinique Et Biologique : Journal De La Societe Francaise De Transfusion Sanguine
|March 28, 2006
PubMed
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Non-invasive prenatal RHD typing using cell-free fetal DNA in maternal blood offers high accuracy (>99%). This method enables PCR-guided antenatal anti-D prophylaxis, proving cost-effective and accessible.

Area of Science:

  • Genetics
  • Molecular Biology
  • Obstetrics

Background:

  • Cell-free fetal DNA (cfDNA) from apoptotic syncytiotrophoblast in maternal circulation enables non-invasive prenatal diagnosis.
  • Challenges include lack of generic fetal DNA positive controls and non-specific amplification of maternal DNA.
  • Non-invasive prenatal RHD typing has been implemented in European laboratories.

Purpose of the Study:

  • To review the characteristics and applications of cfDNA in maternal circulation.
  • To emphasize the utility of cfDNA for prenatal RHD genotyping.
  • To discuss the clinical and economic benefits of non-invasive prenatal RHD typing.

Main Methods:

  • Analysis of cfDNA in maternal blood.
  • Polymerase Chain Reaction (PCR) for RHD genotyping.

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  • Review of existing literature and laboratory practices.

    • Main Results:

    • Diagnostic accuracy for non-invasive prenatal RHD typing exceeds 99%.
    • PCR-guided administration of antenatal anti-D prophylaxis is cost-effective.
    • Non-invasive prenatal RHD typing is readily available in several laboratories.

    Conclusions:

    • Cell-free fetal DNA analysis is a powerful tool for non-invasive prenatal diagnosis.
    • Prenatal RHD genotyping using cfDNA is highly accurate and clinically valuable.
    • Non-invasive methods improve antenatal care and prophylaxis strategies.