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Fetal cells in the maternal circulation
W Holzgreve1, H S Garritsen, D Ganshirt-Ahlert
1Department of Obstetrics and Gynecology, University of Munster, Germany.
The Journal of Reproductive Medicine
|May 1, 1992
Summary
Analyzing fetal cells in maternal blood offers a minimally invasive prenatal diagnosis. Current methods face challenges with low fetal cell concentrations and marker specificity, limiting reliability.
Area of Science:
- Reproductive biology
- Genetics
- Cell biology
Background:
- Non-invasive prenatal diagnosis (NIPD) is highly desirable.
- Maternal circulation contains fetal cells, offering a potential source for genetic analysis.
- Previous methods for fetal cell detection have limitations.
Purpose of the Study:
- To review current methods for isolating and detecting fetal cells from maternal blood.
- To identify challenges and limitations in existing NIPD techniques.
- To discuss potential improvements for reliable fetal cell analysis.
Main Methods:
- Review of established techniques including cytology, cytogenetics, polymerase chain reaction (PCR)-based Y-sequence analysis.
- Discussion of cell separation methods: fluorescence-activated cell sorting (FACS), immunomagnetic beads, and discontinuous density gradient centrifugation.
- Evaluation of fluorescence in situ hybridization (FISH) and antigen-based enrichment strategies.
Main Results:
- Conventional methods may overestimate fetal cell ratios.
- PCR-based Y-sequence analysis is common for male fetuses.
- Transferrin receptor is insufficient for fetal nucleated erythrocyte enrichment.
- FISH shows limited reproducibility due to low fetal cell counts and lack of specific markers.
Conclusions:
- Isolating fetal cells from maternal circulation remains challenging.
- Low and variable fetal cell concentrations hinder reliable prenatal diagnosis.
- Development of specific cell markers and improved enrichment techniques is crucial for advancing NIPD.