Dopamine receptor signaling pathway

**Dopamine receptor signaling pathway** designates the complex biochemical cascade initiated by dopamine binding to its receptors, which belong to the G protein-coupled receptor (GPCR) family[8][1][5]. There are five main subtypes (D1-D5), grouped into D1-like (D1, D5; typically stimulating adenylyl cyclase) and D2-like (D2, D3, D4; typically inhibiting adenylyl cyclase)[1][5]. Receptor activation regulates cAMP levels, protein kinase activation, gene transcription, neuronal excitability, and synaptic plasticity[4][5]. This system orchestrates key functions in movement, cognition, reward, neuroendocrine control, and emotion. Dysfunction within the pathway is central to diseases like Parkinson's, schizophrenia, addiction, and others[5][4][8]. Many drugs act by modulating dopamine receptor signaling, with clinical utility and side effects reflecting the broad influence of these pathways. **Key note:** "Dopamine receptor signaling pathway" is not a molecule or receptor, but refers to a pathway. The correct therapeutic targets would be specific dopamine receptors such as "Dopamine receptor D2" (DRD2), "Dopamine receptor D1" (DRD1), etc.[8][1][5].

Other names

Dopamine receptor signalingDopaminergic signaling pathwayDopamine pathway

Agonism and antagonism at dopamine receptors (D1-D5) - Modulation of dopamine receptor signaling (stimulation or inhibition of cAMP pathway, protein kinase activation) - Functional selectivity (biased agonism)