Are there fetal stem cells in the maternal brain?

Area of Science:

• Neuroscience
• Genetics
• Maternal-Fetal Medicine

Background:

• Fetal cells can enter maternal circulation during pregnancy.
• The ability of fetal cells to cross the maternal blood-brain barrier is not well understood.
• Previous research suggested potential fetal cell involvement in maternal brain repair.

Purpose of the Study:

• To investigate if fetal stem cells can enter the maternal brain during pregnancy.
• To determine if fetal cells can cross the maternal blood-brain barrier.

Main Methods:

• Analysis of brain tissue from deceased women with at least one male offspring.
• DNA extraction using phenol-chloroform and ethanol precipitation.
• Screening for Y chromosome and specific autosomal markers (13, 18, 21, X) using quantitative fluorescent-polymerase chain reaction.

Main Results:

• Fetal stem cells were not detected in the maternal brain tissue.
• Results indicated that fetal stem cells cannot cross the blood-brain barrier.

Conclusions:

• Fetal stem cells do not appear to cross the maternal blood-brain barrier.
• The hypothesis of fetal cell-mediated maternal brain repair is not supported by this study.