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Serotonin Release Mechanism (N/A)

Target: N/A
Molecular classification: Neurotransmission, Cell Signaling

Overview

Serotonin (5-HT) release is a complex process involving exocytotic (vesicular) and nonexocytotic mechanisms. Exocytosis, triggered by calcium influx, releases serotonin into the synaptic cleft. Nonexocytotic release involves diffusion of cytosolic serotonin across the plasma membrane. Somatic/extrasynaptic release, under high-frequency stimulation, results in prolonged signaling from cell bodies and dendrites. The Serotonin Transporter (SERT) and autoreceptors tightly regulate extracellular serotonin concentrations. This multifaceted mechanism enables fine-tuned spatial-temporal control over serotonergic signaling.

Other names: 5-HT ReleaseSerotonergic NeurotransmissionSerotonin Secretion

Mechanism of action

SSRIs block SERT to increase synaptic serotonin; MAOIs inhibit serotonin breakdown, increasing its availability.

Biological functions

Neurotransmitter releaseSynaptic transmissionModulation of neuronal activityRegulation of gastrointestinal functionVasoconstrictionWound healing

Disease associations

Mood disordersDepressionAnxietyGastrointestinal disordersVascular disorders

Safety considerations

Serotonin syndrome (with excessive serotonergic activity)Autoinhibition dampening neuron firing with SSRIsDrug-drug interactions

Interacting drugs

SSRIs (e.g., Fluoxetine, Sertraline)

2 more in the full profile.

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