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Target intelligence / Profile preview
Serotonin Receptor Subtype 3 (5-HT3)
- Target
- 5-HT3
- Molecular classification
- Ligand-gated ion channel, Receptor
01
Overview
The serotonin receptor subtype 3 (5-HT3) is a unique ligand-gated ion channel mediating rapid neuronal excitation. Its structural complexity allows diverse physiological functions across brain-gut axes. Clinically significant as an antiemetic target—and potentially more—it remains an active area of research due to its involvement in multiple neurological and gastrointestinal processes as well as pharmacogenetic variability influencing treatment outcomes.
- Other names
- 5-Hydroxytryptamine receptor 35-HT3 receptor
02
Mechanism of action
Antagonism of the 5-HT3 receptor, blocking the passage of sodium and potassium ions, thus inhibiting neuronal excitation.
03
Biological functions
Fast excitatory neurotransmissionModulation of non-serotonergic activityNeuronal signalingGut-brain communicationNeurotransmitter release modulationIon channel activity
04
Disease associations
EmesisNauseaVomitingPainAnxietyAddictionGastrointestinal disorders
05
Safety considerations
QT interval prolongation (for some 5-HT3 antagonists)ConstipationHeadacheDizzinessPotential for drug interactionsVariability in treatment outcomes due to pharmacogenetic factors
06
Interacting drugs
Ondansetron
7 more in the full profile.
07
Biomarkers
Genetic polymorphisms in 5-HT3 receptor subunits (e.g., 5-HT3A, 5-HT3B) influencing drug responseExpression levels of 5-HT3 receptors in specific brain regions or peripheral tissues
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