Trace amine

Trace Amine

Phenethylamine, a trace amine

Trace amines are a class of endogenous amines that are structurally related to classical biogenic amines such as dopamine, norepinephrine, and serotonin. They are present in the mammalian brain in trace amounts, hence their name. Trace amines include compounds such as phenethylamine, tyramine, tryptamine, and octopamine.

Biochemistry

Trace amines are derived from amino acids and are synthesized in the body through enzymatic decarboxylation. For example, phenethylamine is synthesized from the amino acid phenylalanine, while tyramine is derived from tyrosine. These compounds are metabolized by enzymes such as monoamine oxidase (MAO), which also metabolizes classical neurotransmitters.

Function

Trace amines are believed to play a role in modulating the activity of classical neurotransmitters. They act as neuromodulators and have been implicated in various physiological processes, including mood regulation, arousal, and cognition. Trace amines exert their effects primarily through trace amine-associated receptors (TAARs), a family of G protein-coupled receptors that are distinct from the receptors for classical neurotransmitters.

Trace Amine-Associated Receptors

Trace amine-associated receptors (TAARs) are a group of receptors that are activated by trace amines. These receptors are expressed in various tissues, including the brain, and are involved in the regulation of neurotransmitter systems. TAARs have been a subject of interest in research due to their potential role in neuropsychiatric disorders and their interaction with psychoactive substances.

Clinical Significance

The dysregulation of trace amine systems has been associated with several neuropsychiatric conditions, including depression, schizophrenia, and attention deficit hyperactivity disorder (ADHD). Research into trace amines and their receptors may provide insights into novel therapeutic targets for these disorders.

Related Pages

• Biogenic amine
• Monoamine neurotransmitter
• Neurotransmitter
• G protein-coupled receptor