Editing DOPF

== Dopamine ==

[[File:DOPF_structure.png|thumb|right|Chemical structure of dopamine]]

'''Dopamine''' is a type of [[neurotransmitter]] that plays several important roles in the brain and body. It is an organic chemical of the [[catecholamine]] and [[phenethylamine]] families. Dopamine is produced in several areas of the brain, including the [[substantia nigra]] and the [[ventral tegmental area]].

== Function ==
Dopamine is involved in many functions, including:

* [[Motor control]]: Dopamine is critical for coordinating smooth and controlled movements. It is heavily involved in the [[nigrostriatal pathway]], which is a major dopamine pathway in the brain.
* [[Reward and pleasure]]: Dopamine is often associated with the brain's reward system. It is released during pleasurable situations and stimulates feelings of enjoyment and reinforcement, motivating a person proactively to perform certain activities.
* [[Cognition]]: Dopamine plays a role in executive functions, such as working memory, attention, and problem-solving.
* [[Endocrine regulation]]: Dopamine inhibits the release of [[prolactin]] from the anterior pituitary gland.

== Dopamine Pathways ==
There are several major dopamine pathways in the brain:

* [[Mesolimbic pathway]]: This pathway is involved in the reward circuit and is associated with feelings of pleasure and reinforcement.
* [[Mesocortical pathway]]: This pathway is involved in cognitive control, motivation, and emotional response.
* [[Nigrostriatal pathway]]: This pathway is involved in the coordination of movement.
* [[Tuberoinfundibular pathway]]: This pathway regulates the secretion of hormones from the pituitary gland.

== Clinical Significance ==
Dopamine dysregulation is implicated in several disorders:

* [[Parkinson's disease]]: This is a neurodegenerative disorder characterized by the death of dopamine-producing neurons in the substantia nigra, leading to motor control issues.
* [[Schizophrenia]]: Dopamine dysregulation is thought to contribute to the symptoms of schizophrenia, particularly the positive symptoms such as hallucinations and delusions.
* [[Addiction]]: Many addictive drugs increase dopamine release or block its reuptake, enhancing the reward and pleasure sensations.

== Synthesis and Metabolism ==
Dopamine is synthesized from the amino acid [[tyrosine]], which is converted into [[L-DOPA]] by the enzyme [[tyrosine hydroxylase]]. L-DOPA is then converted into dopamine by the enzyme [[aromatic L-amino acid decarboxylase]].

Dopamine is metabolized by the enzymes [[monoamine oxidase]] (MAO) and [[catechol-O-methyl transferase]] (COMT) into inactive metabolites.

== Related Pages ==
* [[Neurotransmitter]]
* [[Catecholamine]]
* [[Parkinson's disease]]
* [[Schizophrenia]]
* [[Addiction]]

[[Category:Neurotransmitters]]
[[Category:Catecholamines]]