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NGF-dependent sprouting and regeneration in the hippocampus
F H Gage1, G Buzsáki, D M Armstrong
1Department of Neurosciences, M-024, University of California, San Diego, La Jolla 92093.
Progress in Brain Research
|January 1, 1990
Summary
Nerve growth factor (NGF) promotes the survival and regrowth of damaged cholinergic neurons in the hippocampus, aiding functional recovery after injury. Glia cells may regulate NGF availability during these regenerative processes.
Area of Science:
- Neuroscience
- Cell Biology
- Neuroregeneration
Background:
- Hippocampal sprouting and regeneration are known but lack defined cellular and molecular mechanisms.
- The septohippocampal cholinergic system exhibits unique responses to damage.
Purpose of the Study:
- To investigate the role of nerve growth factor (NGF) in the regenerative responses of the septohippocampal cholinergic circuit.
- To elucidate the cellular and molecular events underlying hippocampal plasticity.
Main Methods:
- Investigated the effects of NGF on cholinergic neuron survival and fiber regrowth in lesioned young and aged rats.
- Proposed a role for glia cells in regulating NGF availability.
Main Results:
- NGF supports adult cholinergic neuron survival and induces regrowth of damaged fibers.
- NGF-mediated repair leads to functional recovery in rats with fimbria-fornix lesions.
- Glia cells are implicated in regulating NGF levels during degeneration and regeneration.
Conclusions:
- NGF plays a crucial role in the repair and functional recovery of the septohippocampal cholinergic system.
- The interaction between NGF and the cholinergic system may serve as a model for other neurotrophic factor interactions.