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Related Experiment Videos

Clinical trials and experience: Boston

D W Bianchi1

  • 1Department of Pediatrics, Tufts University School of Medicine, Boston, Massachusetts 02111.

Annals of the New York Academy of Sciences
|September 7, 1994
PubMed
Summary
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Fetal nucleated erythrocytes are the preferred fetal cells for prenatal cytogenetic diagnosis. New methods like quantitative PCR improve cell separation and purity assessment for reliable genetic testing.

Area of Science:

  • Reproductive biology
  • Genetics
  • Cell biology

Background:

  • Prenatal diagnosis of fetal genetic abnormalities is crucial for pregnancy management.
  • Isolation and analysis of fetal cells from maternal circulation offer a non-invasive approach.
  • Fetal nucleated erythrocytes are considered the primary target cell type due to their direct reflection of fetal cytogenetic status.

Purpose of the Study:

  • To validate fetal nucleated erythrocytes as the optimal fetal cell type for cytogenetic analysis.
  • To explore the utility of quantitative PCR (qPCR) in assessing cell separation methods and sample purity.
  • To investigate factors influencing fetal cell numbers in maternal circulation and the timing of fetomaternal cell transfer.

Main Methods:

  • Utilizing fetal nucleated erythrocytes as the target fetal cell for isolation.

Related Experiment Videos

  • Employing quantitative PCR (qPCR) for method comparison and purity assessment.
  • Planning fluorescence in situ hybridization (FISH) studies for cytogenetic diagnosis.

    • Main Results:

    • Fetal nucleated erythrocytes are consistently validated as the cell type of choice.
    • Quantitative PCR (qPCR) proves sensitive for comparing cell separation techniques and assessing sample purity.
    • Aneuploid pregnancies may exhibit increased fetal cell numbers in maternal circulation.

    Conclusions:

    • Fetal nucleated erythrocytes remain the gold standard for non-invasive prenatal cytogenetic diagnosis.
    • Quantitative PCR (qPCR) is a valuable tool for optimizing fetal cell isolation and purity assessment.
    • Achieving high fetal cell purity (≥20%) for reliable FISH analysis is increasingly feasible.