Bone Morphogenetic Protein Promotes Lewis X Stage-Specific Embryonic Antigen 1 Expression Thereby Interfering with...

Area of Science:

• Neuroscience
• Developmental Biology
• Stem Cell Biology

Background:

• Prominin-1 and Lewis X stage-specific embryonic antigen 1 (LeX-SSEA1) are used as neural stem cell (NSC) surface markers.
• The precise role and expression pattern of LeX-SSEA1 in NSCs remain unclear.

Purpose of the Study:

• To investigate the expression and biological significance of LeX-SSEA1 in neonatal and adult neural stem cells and their progeny.
• To elucidate the relationship between LeX-SSEA1, aging, bone morphogenetic protein (BMP) signaling, and neural precursor proliferation.

Main Methods:

• Monitoring LeX-SSEA1 expression in neural stem cells and their progeny across different postnatal ages.
• Assessing the impact of bone morphogenetic protein (BMP) signaling on LeX-SSEA1 expression and cell proliferation.
• Investigating the role of LeX-SSEA1 in regulating cell cycle withdrawal and proliferation.

Main Results:

• LeX-SSEA1 expression and immunopositivity increase with postnatal age in neural lineage cells.
• Increased LeX-SSEA1 correlates with decreased proliferation and quiescence in neural precursors.
• Bone morphogenetic protein (BMP) signaling enhances LeX-SSEA1 expression, promoting cell cycle exit via cell surface interactions.

Conclusions:

• LeX-SSEA1 expression rises with age and BMP signaling in the postnatal germinal niche.
• LeX-SSEA1 upregulation, particularly in response to BMP, downregulates the proliferation of subependymal zone precursors, including neural stem cells.
• LeX-SSEA1 is a key regulator of neural stem cell quiescence and proliferation in the developing brain.