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Co-expression of MAP-2 and GFAP in cells developing from rat EGF responsive precursor cells
A E Rosser1, P Tyers, M ter Borg
1MRC Cambridge Centre for Brain Repair, Cambridge University Forvie Site, UK. aer23@hermes.cam.ac.uk
Brain Research. Developmental Brain Research
|February 20, 1997
Summary
Epidermal growth factor (EGF)-responsive precursors primarily develop into glial cells, with only a small fraction becoming neurons. Early glial development involves a stage expressing neuronal markers like MAP-2c.
Area of Science:
- Neuroscience
- Developmental Biology
- Cell Biology
Background:
- Epidermal growth factor (EGF)-responsive precursors are crucial for neural development.
- Understanding the differentiation pathways of these precursors into neurons and astrocytes is essential.
Purpose of the Study:
- To analyze the differentiation of EGF-responsive precursors into neurons and astrocytes.
- To identify developmental markers and stages in this process.
Main Methods:
- Utilized antibodies against nestin, microtubule-associated protein 2 (MAP-2c and MAP-2ab), and glial fibrillary acidic protein (GFAP).
- Performed detailed analysis of EGF-responsive precursors at various developmental time points.
Main Results:
- Early GFAP-positive cells (astrocyte marker) also stained for MAP-2c (neuronal marker), suggesting a transitional stage in astroglial development.
- At 7 days, the majority of cells differentiated into astrocytes.
- MAP-2ab-positive cells (mature neuron marker) represented only 5% of the neuronal population.
Conclusions:
- MAP-2c serves as an early precursor marker.
- Most EGF-responsive precursors differentiate into glial cells.
- A limited number of EGF-responsive precursors develop into neurons expressing MAP-2ab, indicating potential missing signals for complete neuronal differentiation.
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