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Neurotransmitter plasticity at the molecular level
Science (New York, N.Y.)
|September 21, 1984
Summary
Neurons exhibit remarkable transmitter plasticity, changing neurotransmitter expression dynamically throughout development and maturity. This flexibility, influenced by factors like depolarization, enhances nervous system function.
Area of Science:
- Neuroscience
- Cellular Biology
- Neurochemistry
Background:
- Traditionally, neurons were classified by fixed neurotransmitter expression (e.g., noradrenergic, cholinergic).
- Recent research challenges this dogma, revealing neuronal plasticity in transmitter phenotype.
Purpose of the Study:
- To investigate the phenomenon of neurotransmitter plasticity in neurons.
- To explore the mechanisms and implications of dynamic transmitter expression.
Main Methods:
- Studies involved sympathetic neurons, primary sensory neurons, and brain nucleus locus ceruleus cultures.
- Investigated the role of membrane depolarization, sodium ion influx, and extracellular factors.
Main Results:
- Sympathetic neurons can express peptide transmitters like substance P, alongside classical ones.
- Mature neurons, including primary sensory neurons, can exhibit catecholaminergic phenotypes in vivo.
- Extracellular factors induce significant transmitter changes in central nervous system neurons (locus ceruleus).
Conclusions:
- Neurotransmitter expression is not fixed but a dynamic, regulated process.
- Neuronal plasticity in transmitter status adds flexibility to nervous system function.
- This plasticity occurs in both developing and mature neurons across the nervous system.