Current knowledge about fetal blood cells in the maternal circulation

Area of Science:

• Reproductive biology
• Genetics
• Cellular biology

Background:

• Fetal cells are present in maternal circulation.
• Isolation methods vary in cost and expertise.
• Specific fetal cell types like trophoblasts and nucleated erythrocytes are targeted.

Purpose of the Study:

• To review the current status and future of noninvasive prenatal genetic analysis.
• To discuss the isolation and identification of fetal cells from maternal blood.
• To explore diagnostic applications and implications of fetal cells in maternal circulation.

Main Methods:

• Isolation of fetal cells from maternal blood using various separation techniques.
• Identification of fetal cells based on cell surface and cytoplasmic protein expression.
• Screening for aneuploidy via chromosome-specific probes on interphase nuclei.
• Single gene and single cell analysis for expanded diagnostics.

Main Results:

• Improved fetal cell identification through protein expression understanding.
• Detection of aneuploidy in isolated fetal cells.
• Fetal cells are more common in trisomy 21 pregnancies.
• Fetomaternal transfusion at delivery can lead to fetal cell microchimerism.

Conclusions:

• Noninvasive prenatal genetic analysis via fetal cell isolation is a progressing field.
• Technical challenges remain, but diagnostic potential is significant.
• Fetal cells in maternal blood offer insights into pregnancy immunobiology and potential maternal disease links.