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Neurotransmitters: past, present, and future directions.
1Department of Basic and Clinical Research, Scripps Clinic and Research Foundation, La Jolla, California 92037.
Summary
Central neurotransmitters, initially simple, now involve complex signaling pathways with second messengers. Future research will explore new signals and integrate findings into the functioning brain.
Area of Science:
- Neuroscience
- Cellular Biology
- Neurochemistry
Background:
- Central neurotransmitters were initially understood as simple exciters or inhibitors acting via passive ionic conductances.
- The complexity of neurotransmitter actions has expanded to include intracellular second messengers regulating ionic conductances.
Purpose of the Study:
- To review the evolving understanding of neurotransmitter actions.
- To highlight current research directions and future prospects in neurotransmitter signaling.
Main Methods:
- Literature review and synthesis of current research trends.
- Analysis of historical concepts and future projections in neurotransmitter research.
Main Results:
- Neurotransmitter actions are increasingly complex, involving diverse signaling molecules and regulatory mechanisms.
- Current research focuses on identifying new transmitter candidates and elucidating receptor regulation and signal transduction pathways.
- Coordinated actions of neurotransmitters on synaptic targets are being investigated.
Conclusions:
- Future research will likely uncover novel signaling molecules (lipids, steroids, peptides) and receptors.
- Integrating in vitro findings with in vivo brain function is a key future direction.
- Neurotransmitters remain a crucial and dynamic area for scientific investigation.