Related Experiment Video
Updated: Jan 13, 2026
08:15
Network Pharmacology and Validation of the Antidepressant Mechanisms of Qiangzhifang in a Chronic Restraint Stress-induced Depression Rat Model
Published on: June 6, 2025
518
Nitric Oxide Synthase Inhibitors as Antidepressants
Gregers Wegener1, Vallo Volke2
1Centre for Psychiatric Research, University of Aarhus, Skovagervej 2, DK-8240 Risskov, Denmark. wegener@dadlnet.dk.
Pharmaceuticals (Basel, Switzerland)
|October 8, 2016
Summary
Nitric oxide (NO) signaling pathways are implicated in mood and anxiety disorders, offering potential therapeutic targets. Modulating NO synthesis may provide novel treatments for depression and anxiety.
Area of Science:
- Neuroscience
- Pharmacology
- Psychiatry
Background:
- Affective and anxiety disorders have significant societal and economic impacts.
- Traditional antidepressant drug actions focus on serotonergic mechanisms.
- Emerging evidence suggests the involvement of the nitric oxide (NO) signaling pathway in mood and stress-related disorders.
Approach:
- Reviewing studies on the involvement of the NO signaling pathway in depression and anxiety.
- Examining the regulatory role of NO in neurotransmitters like serotonin, glutamate, and GABA.
- Investigating how antidepressants modulate hippocampal NO levels in vivo.
Key Points:
- The NO system is intricately linked with the regulation of key neurotransmitters.
- Antidepressant drugs can influence NO levels in the hippocampus.
- NO signaling pathways represent a potential target for novel anxiolytic and antidepressant therapies.
Conclusions:
- The NO system presents a potential therapeutic target for both acute treatment and prophylaxis of anxiety and depression.
- Drugs modulating NO synthesis warrant further investigation for their antidepressant and anxiolytic potential.
Related Concept Videos
01:23Antidepressant Drugs: MAOIs and Other Agents
797
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...
797
01:28Nitric Oxide Signaling Pathway
6.1K
Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure...
6.1K
01:25Antidepressant Drugs: Overview
1.4K
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...
1.4K
01:28Antidepressant Drugs: Tricyclics, SSRIs, and SNRIs
1.4K
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...
1.4K
01:16Antianginal Drugs: Nitrates and β-Blockers
1.4K
In cardiovascular health, antianginal drugs combat angina pectoris — a condition marked by chest pain owing to diminished blood flow to the heart.
Organic nitrates, such as nitroglycerin, play a pivotal role. Once metabolized, they liberate nitric oxide, a molecular marvel. Nitric oxide triggers guanylyl cyclase and augments cGMP production. This biochemical cascade orchestrates the relaxation of vascular smooth muscles, ushering in vasodilation and enhancing coronary blood flow....
Organic nitrates, such as nitroglycerin, play a pivotal role. Once metabolized, they liberate nitric oxide, a molecular marvel. Nitric oxide triggers guanylyl cyclase and augments cGMP production. This biochemical cascade orchestrates the relaxation of vascular smooth muscles, ushering in vasodilation and enhancing coronary blood flow....
1.4K
01:23Antihypertensive Drugs: Vasodilators
2.0K
Vasodilators, primarily affecting the smooth muscles within arterial and venous walls, are commonly used for hypertension treatment. Medications such as minoxidil and hydralazine primarily target arteries and arterioles, while sodium nitroprusside acts on arterioles and venules. Minoxidil, functioning as a prodrug, is metabolized by hepatic sulfotransferase into its active form, minoxidil sulfate, after oral administration. This metabolite binds to the sulfonylurea receptor (SUR) component of...
2.0K