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Related Experiment Video

Updated: Jul 5, 2026

Thermostabilization, Expression, Purification, and Crystallization of the Human Serotonin Transporter Bound to S-citalopram

Thermostabilization, Expression, Purification, and Crystallization of the Human Serotonin Transporter Bound to S-citalopram

Published on: November 27, 2016

Serotonin type 3 receptor genes: HTR3A, B, C, D, E.

Beate Niesler¹, Johannes Kapeller, Christian Hammer

¹Department of Human Molecular Genetics, University of Heidelberg, Im Neuenheimer Feld 366, 69120 Heidelberg, Germany. beate_niesler@med.uni-heidelberg.de

Pharmacogenomics

|May 10, 2008

Summary

The serotonin 5-HT(3) receptor, a key ion channel, has five human subunits involved in various disorders. Genetic variations in HTR3A and HTR3B may predict treatment outcomes for nausea and psychiatric conditions.

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Area of Science:

Neuroscience
Pharmacology
Genetics

Background:

The serotonin 5-HT(3) receptor is a ligand-gated ion channel crucial for neurotransmission.
Five human subunits (5-HT3A-E) encoded by HTR3 genes form diverse pentameric receptor complexes.
These receptors are implicated in chemotherapy-induced nausea and vomiting (CINV), irritable bowel syndrome, and psychiatric disorders.

Purpose of the Study:

To explore the role of different 5-HT(3) receptor subtypes in various physiological and pathological conditions.
To investigate the therapeutic potential of 5-HT(3) receptor antagonists.
To examine the contribution of HTR3A and HTR3B gene polymorphisms to psychiatric disorders and treatment prediction.

Main Methods:

Review of existing literature on 5-HT(3) receptor structure, function, and genetics.
Analysis of the involvement of 5-HT(3) receptor subtypes in CINV, IBS, and psychiatric disorders.
Examination of the clinical significance of HTR3A and HTR3B polymorphisms.

Main Results:

5-HT(3) receptor antagonists are effective treatments for CINV and irritable bowel syndrome.
Specific receptor subtypes are associated with the pathophysiology of these conditions.
Polymorphisms in HTR3A and HTR3B genes show potential as predictive markers for psychiatric disorders and CINV treatment response.

Conclusions:

The 5-HT(3) receptor system is a significant therapeutic target for gastrointestinal and psychiatric conditions.
Understanding receptor subunit composition and genetic variations is vital for personalized medicine.
HTR3A and HTR3B polymorphisms offer promise for predicting patient outcomes and guiding treatment strategies.