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Cotransmitters: pharmacological implications.

A Guidotti, L Saiani, B C Wise

Journal of Neural Transmission. Supplementum

|January 1, 1983

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Neuroactive substances can coexist and be released together from nerve terminals, acting as primary or cotransmitters. This discovery impacts synaptic transmission models and pharmacology.

Area of Science:

Neuroscience
Neuropharmacology
Cellular Signaling

Background:

Coexistence of multiple neuroactive substances in single nerve terminals challenges traditional synaptic transmission models.
Understanding cotransmission is crucial for reevaluating synaptic pharmacology.

Purpose of the Study:

To explore the concept of cotransmission, where multiple neuroactive substances are released simultaneously.
To redefine the roles of primary transmitters and cotransmitters in synaptic function.

Main Methods:

Review of existing literature on coexisting neuroactive substances in axon terminals.
Analysis of specific examples illustrating primary transmitter and cotransmitter interactions.

Main Results:

Related Experiment Videos

Neuroactive substances can act as primary transmitters (activating receptors) or cotransmitters (modulating system gain).
Examples include opiate peptide modulation of nicotinic receptors and benzodiazepine modulation of GABA receptors.

Conclusions:

Understanding cotransmitter mechanisms is vital for elucidating nervous system functions.
This knowledge aids in drug action interpretation and development of targeted therapeutics with fewer side effects.