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Related Concept Videos

Drugs Affecting GI Tract Motility: Serotonin Receptor Agonists01:23

Drugs Affecting GI Tract Motility: Serotonin Receptor Agonists

Serotonin, a crucial neurotransmitter synthesized by enterochromaffin cells, plays a cardinal role in regulating gastrointestinal (GI) motility. With over 90% of the body's total serotonin in the GI tract, its influence on digestive processes is profound. Serotonin is swiftly released upon various stimuli, such as food boluses or certain drugs, triggering intrinsic sensory neurons in the myenteric plexus and extrinsic vagal and spinal sensory neurons. This leads to the activation of the...
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Antidepressant Drugs: MAOIs and Other Agents

Atypical antidepressants, including bupropion (Wellbutrin), mirtazapine (Remeron), nefazodone (Serzone), trazodone (Desyrel), and vilazodone (Viibryd), offer unique mechanisms of action. Bupropion weakly inhibits dopamine and norepinephrine reuptake, aiding depression treatment and smoking cessation, with a low risk of sexual dysfunction. Mirtazapine enhances serotonin and norepinephrine neurotransmission, leading to sedation, increased appetite, and weight gain. As a result, it helps treat...
Antidepressant Drugs: Overview01:25

Antidepressant Drugs: Overview

Antidepressant drugs are a class of medications primarily used for treating various mood disorders, including major depression, anxiety disorders, and other related conditions. These medicines work by modulating the neurotransmitter balance within the brain, alleviating depressive symptoms. Antidepressants can be broadly categorized into several groups according to their mechanism of action and chemical structure: Selective Serotonin Reuptake Inhibitors (SSRIs), Serotonin-Norepinephrine...
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Tricyclic Antidepressants (TCAs), including Desipramine (Norpramin), Imipramine (Tofranil), Clomipramine (Anafranil), and Amitriptyline (Elavil), inhibit serotonin and norepinephrine reuptake and also block other receptors. They are used for depression, pain conditions, and insomnia. Common adverse effects include anticholinergic effects, sedation, orthostatic hypotension, and weight gain. They have a narrow therapeutic window and so require plasma-level monitoring. Abrupt discontinuation can...
G-protein Coupled Receptors01:21

G-protein Coupled Receptors

G-protein coupled receptors are ligand binding receptors that indirectly affect changes in the cell. The actual receptor is a single polypeptide that transverses the cell membrane seven times creating intracellular and extracellular loops. The extracellular loops create a ligand specific pocket which binds to neurotransmitters or hormones. The intracellular loops holds onto the G-protein.
Drugs Affecting Neurotransmitter Release or Uptake01:21

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Certain drugs can affect how neurotransmitters called catecholamines, are released or taken back up in the adrenergic neuron. They can have different effects on the body's sympathetic transmission. Reserpine, a natural compound found in the Rauwolfia shrub, blocks a transporter called vesicular monoamine transporter (VMAT), which leads to a buildup of catecholamines in the cell and reduces sympathetic transmission. Another drug called guanethidine works in multiple ways, including blocking...

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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
12:21

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

Published on: November 27, 2016

Serotonin: a review.

L F Mohammad-Zadeh1, L Moses, S M Gwaltney-Brant

  • 1Southern Arizona Veterinary Specialty and Emergency Center, Tucson, AZ 85705, USA. ladan@mohammad-zadeh.com

Journal of Veterinary Pharmacology and Therapeutics
|May 13, 2008
PubMed
Summary
This summary is machine-generated.

Serotonin, a neurotransmitter, impacts various bodily functions and is linked to mood disorders. New research explores serotonin toxicity, known as Serotonin Syndrome, in both humans and animals.

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Related Experiment Videos

Last Updated: Jul 5, 2026

Thermostabilization, Expression, Purification, and Crystallization of the Human Serotonin Transporter Bound to S-citalopram
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Rapid In Situ Hybridization using Oligonucleotide Probes on Paraformaldehyde-prefixed Brain of Rats with Serotonin Syndrome
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Rapid In Situ Hybridization using Oligonucleotide Probes on Paraformaldehyde-prefixed Brain of Rats with Serotonin Syndrome

Published on: September 23, 2015

Area of Science:

  • Neuroscience
  • Pharmacology
  • Veterinary Medicine

Background:

  • 5-Hydroxytryptamine (serotonin) is a key neurotransmitter.
  • Serotonin influences gastrointestinal motility, vascular tone, platelet function, and mood.
  • Research in animal models has elucidated serotonin's roles in human physiology and disease pathophysiology.

Purpose of the Study:

  • To review the physiology of serotonin.
  • To explore serotonin's role in various pathophysiologic mechanisms.
  • To discuss the clinical presentation and implications of Serotonin Syndrome.

Main Methods:

  • Literature review of studies on serotonin's physiological roles.
  • Analysis of research involving animal models to understand serotonin's functions.
  • Examination of clinical data and case studies related to serotonin toxicity.

Main Results:

  • Serotonin modulates critical physiological functions, including gastrointestinal and vascular tone.
  • Dysregulation of serotonin is implicated in mood disorders, emesis, migraine, IBS, and hypertension.
  • Increased use of serotonergic drugs has led to the identification of Serotonin Syndrome as a novel toxicity in humans and animals.

Conclusions:

  • Understanding serotonin's complex roles is crucial for both human and veterinary medicine.
  • Serotonin Syndrome represents a significant adverse effect of serotonergic system manipulation.
  • Further research is needed to fully elucidate the mechanisms and management of serotonin toxicity.