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Distribution of basic fibroblast growth factor in the developing rat brain
F Gómez-Pinilla1, J W Lee, C W Cotman
1Department of Neurology/IRU in Brain Aging, University of California, Irvine 92717-4550.
Neuroscience
|August 1, 1994
Summary
Basic fibroblast growth factor (bFGF) plays dynamic roles in the developing rodent brain. Its expression changes from embryonic to adult stages, indicating evolving functions in central nervous system development.
Area of Science:
- Neuroscience
- Developmental Biology
- Cell Biology
Background:
- In vitro studies suggest basic fibroblast growth factor (bFGF) is crucial for neural cell survival, proliferation, and differentiation.
- The in vivo roles of bFGF in neural development require further investigation.
Purpose of the Study:
- To investigate the localization and expression patterns of bFGF in the rodent brain during critical developmental stages.
- To understand the potential roles of bFGF in central nervous system (CNS) histogenesis and differentiation.
Main Methods:
- Immunoreactivity for bFGF was characterized in rodent brains at various embryonic and postnatal developmental time points (E13, E18, P1, P4-6, P10, P20, P90).
- Localization of bFGF was assessed in different cell types and brain regions.
Main Results:
- bFGF expression was transient and cell-type specific throughout development.
- Early expression was observed in various cell phenotypes, followed by localization in the cerebral cortex, hippocampus, medial septum, and diagonal band nuclei.
- Astrocytes began expressing bFGF around postnatal days 4-6, and by P20, astrocytes throughout the brain showed bFGF immunoreactivity, with restricted neuronal expression.
Conclusions:
- The cellular localization of bFGF undergoes significant changes during rodent brain development.
- These dynamic expression patterns suggest that bFGF has multiple, evolving functions in CNS histogenesis and neuronal differentiation.