Serotonin

Serotonin is one of several chemical messengers in the brain, or neurotransmitters, which help brain cells communicate with one another. Among many other functions, serotonin is involved in regulating mood. Problems with making or using the right amount of serotonin have been linked to many mental disorders, including depression, bipolar disorder, anxiety disorder, autism, and schizophrenia.

What is Serotonin?

Serotonin is an example of a neurotransmitter, a chemical messenger that is passed between nerve cells. When a nerve impulse reaches the axon at the end of a nerve, neurotransmitters are released which cross an area called the synapse to be received by a specific receptor on the end of a target nerve. Once received by the target nerve, the neurotransmitter may either excite that nerve to fire its own signal or prevent it from firing the signal.

Serotonin Function

Serotonin Biosynthesis

Drugs Targeting the 5-HT System

Serotonin Pathology

Serotonin in Plants

The Relationship Between Serotonin and 5-HTP

Do Serotonin and Antidepressants Affect the Microbiome?

Serotonin and Aggression

Latest Serotonin News and Research

Study shows early promise of using laughing gas to relieve veterans' PTSD symptoms

For military veterans suffering from post-traumatic stress disorder (PTSD), symptoms such as anxiety, anger and depression can have a devastating impact on their health, daily routine, relationships and overall quality of life.

2 Jul 2020

Study: Oats and rye brans reduce weight gain, hepatic inflammation

In a newly published experimental study, the consumption of dietary fibre from oat and rye brans supported the growth of beneficial gut microbiota, which in turn ameliorated cholesterol metabolism, enhanced gut barrier function and reduced hepatic inflammation.

2 Jul 2020

Platelets may be contributing to COVID-19

The current pandemic of COVID-19 is characterized mainly by severe acute respiratory distress of the lungs, but other organ dysfunctions are also being observed, including the heart and blood vessels. Now, a new paper published on the preprint server medRxiv* in June 2020 describes the abnormal activation of platelets in this disease and the link between this phenomenon and poor outcomes for COVID-19 patients.

24 Jun 2020

Antidepressant fluoxetine (Prozac) suppresses replication of SARS-CoV-2

A study conducted by researchers at Julius-Maximilians-Universität Würzburg has shown that the antidepressant agent fluoxetine may be an effective drug for the early treatment of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) among at-risk groups.

16 Jun 2020

New $26.9 million project aims to create better psychiatric drugs without side effects

Rapidly acting drugs to treat depression, anxiety, or substance abuse without side effects do not exist. Researchers led by Bryan L. Roth, MD, PhD, the Michael Hooker Distinguished Professor of Pharmacology at the UNC School of Medicine, are trying to change that.

16 Jun 2020

Study shows how a nervous system coordinates distinct behavioral outputs

For a nematode worm, a big lawn of the bacteria that it eats is a great place for it to disperse its eggs so that each hatchling can emerge into a nutritive environment.

11 Jun 2020

Antipsychotic drug clozapine can trigger severe obsessive-compulsive symptoms

A review published in the current issue of Psychotherapy and Psychosomatics analyzes the obsessions and compulsions associated with the use of clozapine, an antipsychotic drug,

11 Jun 2020

Happiness could offer protection from gastrointestinal distress

Serotonin, a chemical known for its role in producing feelings of well-being and happiness in the brain, can reduce the ability of some intestinal pathogens to cause deadly infections, new research by UT Southwestern scientists suggests.

9 Jun 2020

Anesthetic drug Ketamine uses serotonin receptors to relieve depression

Ketamine is a drug used to induce general anesthesia. It has also been found to act rapidly to relieve depression that has failed to respond to two other rounds of medication. A new study published in the journal Translational Psychiatry in May 2020 reports the mechanism of action of the drug, which was hitherto unknown. This could help find new ways to treat this debilitating and sometimes fatal condition.

31 May 2020

Researchers show how ketamine fights difficult-to-treat depression

The anaesthetic drug ketamine has been shown, in low doses, to have a rapid effect on difficult-to-treat depression.

31 May 2020

A new treatment option for activating cellular defenses against neurodegenerative disease

Talk about motherly instincts: Biologists at the University of Iowa have learned that female roundworms can alert their future offspring of dangers they will encounter when born, and the mothers pass on these warnings even before the offspring have been conceived.

19 May 2020

Individuals with social anxiety disorder show large differences in personality traits

Individuals with social anxiety disorder have markedly different personality traits than others. Emotional instability and introversion are hallmarks, according to a new study from Uppsala University published in PLOS ONE.

29 Apr 2020

Breastfeeding helps reduce the risk of maternal postpartum diabetes

A team of South Korean researchers found that lactation can lower the incidence and reduce the risk of maternal postpartum diabetes.

29 Apr 2020

Researchers identify biological mechanism in depressed individuals

University of Illinois at Chicago researchers report that in depressed individuals there are increased amounts of an unmodified structural protein, called tubulin, in lipid rafts -; fatty sections of a cell membrane -; compared with non-depressed individuals.

22 Apr 2020

New computational model shows how psilocybin affects brain activity

Interest in research into the effects of psilocybin, a psychedelic drug, has increased significantly in recent years due to its promising therapeutic effects in neuropsychiatric disorders such as depression, anxiety and addiction.

17 Apr 2020

Researchers discover novel role for dopamine that impacts gene expression related to cocaine abuse

A new role for dopamine independent of classic neurotransmission may be critical gene expression changes related to cocaine use.

9 Apr 2020

Depressive disorders in patients with HIV/AIDS often go unrecognized or untreated

People living with HIV/AIDS are at increased risk of depressive disorders. But all too often, these conditions go unrecognized or untreated, suggests a literature review in the May/June issue of Harvard Review of Psychiatry.

7 Apr 2020

Study reveals how serotonin balances communication within the brain

Our brain is steadily engaged in soliloquies. These internal communications are usually also bombarded with external sensory events.

7 Apr 2020

Zebrafish can provide genetic clues to human nicotine addiction

Researchers at Queen Mary University of London have shown that zebrafish can provide genetic clues to smoking, a complex human behavior.

30 Mar 2020

Research team identifies a molecule that directs neurons

The habenula is a small region at the centre of the brain, but is crucial for people's lives. It is made up of groups of nerve cells that control the "neurotransmitters" of the brain, that is to say substances like dopamine, noradrenaline and serotonin.

24 Mar 2020