monoamine
Học thuậtThân thiện
Definition
Noun A monoamine is a type of organic compound containing a single amino group (-NH₂) bonded to an aromatic ring. In biological contexts, it most commonly refers to a class of neurotransmitters and neuromodulators derived from amino acids, which play crucial roles in regulating mood, emotion, arousal, and other brain functions.
Examples of Usage
- The neurotransmitters serotonin and dopamine are both classified as monoamines.
- Many antidepressant medications work by affecting the levels of monoamines in the synaptic cleft.
- Researchers are studying the role of monoamines in the brain's reward system.
Advanced Usage
- Monoamine Hypothesis: A theory proposing that depression is caused by a deficiency of monoamine neurotransmitters (like serotonin, norepinephrine, and dopamine) in the brain. This is a foundational concept in psychopharmacology.
- Monoamine Oxidase (MAO): An enzyme that breaks down monoamine neurotransmitters. Inhibitors of this enzyme (MAOIs) are a class of antidepressant drugs.
- Monoaminergic: An adjective describing neurons, pathways, or systems in the brain that use monoamines as their neurotransmitter.
Variants and Related Words
- Monoamine Oxidase Inhibitor (MAOI) (n): A class of drugs that prevent the breakdown of monoamine neurotransmitters, used to treat depression and other disorders.
- Biogenic Amine (n): A broader biological category that includes monoamines (like serotonin, histamine) as well as other amines like catecholamines.
Synonyms
- Neurotransmitter (in specific biological contexts, though not all neurotransmitters are monoamines and not all monoamines function solely as neurotransmitters).
- Biogenic amine (a closely related, slightly broader term).
Related Phrases
(This word is a scientific/chemical term and does not have common phrasal verbs or idioms in everyday language.)
Noun
- a molecule containing one amine group (especially one that is a neurotransmitter)