Dopamine receptor (DR) (DR)

Dopamine receptors are a class of G protein-coupled receptors (GPCRs) that mediate the physiological actions of the neurotransmitter dopamine in the central nervous system and peripheral tissues [Wikipedia, StatPearls]. They are categorized into two main families: the D1-like family (D1 and D5), which typically stimulates adenylyl cyclase activity via Gs proteins, and the D2-like family (D2, D3, and D4), which inhibits adenylyl cyclase via Gi/o proteins [Wikipedia, StatPearls]. These receptors play critical roles in regulating motor function, reward-seeking behavior, cognition, and neuroendocrine secretion [Wikipedia, NIH]. Dysregulation of dopaminergic signaling is a hallmark of several neuropsychiatric and neurological conditions, including schizophrenia, Parkinson's disease, and attention-deficit hyperactivity disorder (ADHD) [NIH, PubMed]. Consequently, dopamine receptors are major therapeutic targets; D2 receptor antagonists are widely used as antipsychotics, while D2/D3 agonists are primary treatments for Parkinson's disease [Wikipedia, NIH]. Beyond the brain, dopamine receptors also influence cardiovascular and renal functions, such as blood pressure regulation and sodium excretion [NIH, Therapeutic Guidelines].

Other names

Dopamine D receptorsDopamine receptor familyDARDRDD-type dopamine receptors

Dopamine receptors are G protein-coupled receptors (GPCRs) that signal through two primary pathways: the D1-like family (D1 and D5) couples to Gs proteins to stimulate adenylyl cyclase and increase intracellular cAMP levels, while the D2-like family (D2, D3, and D4) couples to Gi/o proteins to inhibit adenylyl cyclase, decrease cAMP, and modulate ion channels such as potassium and calcium channels [Wikipedia, StatPearls]. These receptors also engage in G protein-independent signaling via beta-arrestin recruitment, which influences processes like receptor internalization and distinct intracellular cascades [PubMed, columbiapsychiatry.org].