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Developmental changes in progenitor cell responsiveness to bone morphogenetic proteins differentially modulate
1Department of Neurology, the Rose F. Kennedy Center for Research in Mental Retardation and Developmental Disabilities, Albert Einstein College of Medicine, Bronx, N.Y., USA. mehler@aecom.yu.edu
Developmental Neuroscience
|February 5, 2000
Summary
Bone morphogenetic proteins (BMPs) influence neural progenitor cell development differently across embryonic stages. BMPs can inhibit or promote specific neural lineages, suggesting developmental stage dictates progenitor cell response to these signals.
Area of Science:
- Neuroscience
- Developmental Biology
- Cell Biology
Background:
- Multipotent progenitor cells generate diverse neural cell types throughout life.
- Neural cell differentiation occurs in specific developmental time windows.
- The role of signaling molecules in stage-specific differentiation is not fully understood.
Purpose of the Study:
- To investigate how progenitor cell responses to bone morphogenetic proteins (BMPs) change during neural development.
- To determine if BMPs can orchestrate the generation of different neural lineages at distinct developmental stages.
Main Methods:
- Culturing neural progenitor cells from different embryonic and perinatal stages (E13, E16).
- Treating progenitor cells with varying concentrations of BMPs and a BMP antagonist (noggin).
- Assessing progenitor cell proliferation, cell death, and lineage-specific differentiation (neuronal, astroglial, oligodendroglial).
Main Results:
- Early embryonic BMPs inhibit progenitor proliferation and promote cell death.
- Later embryonic BMPs show concentration-dependent effects: promoting neuronal/astroglial generation at low doses and cell death at high doses.
- Perinatal BMPs enhance astroglial differentiation but inhibit oligodendroglial differentiation.
- BMP antagonism promotes oligodendrocyte generation, indicating active suppression by endogenous BMPs.
Conclusions:
- Neural progenitor cell responsiveness to BMPs changes significantly during development.
- BMP signaling plays a crucial, stage-dependent role in regulating neural lineage commitment and cell survival.
- Dynamic changes in progenitor cell responses to BMPs offer a novel mechanism for controlling neural development.