Dopamine receptor D1-like (DRD1-like)

The Dopamine receptor D1-like family consists of G protein-coupled receptors including D1 and D5 subtypes[1][3][5][7]. These receptors mediate the effects of dopamine by coupling to the Gs protein, resulting in activation of adenylyl cyclase and increased cAMP levels. They are highly expressed in the striatum, cerebral cortex, and other brain regions, and are involved in the regulation of movement, motivation, attention, and higher cognitive functions. D1-like receptors play major roles in both physiological processes (e.g., learning, reward signaling) and pathological conditions (notably Parkinson’s disease, schizophrenia, addiction, and ADHD). Pharmacological modulation of D1-like receptors, through agonists and antagonists or indirect agents (like L-DOPA, amphetamines, and cocaine), offers therapeutic avenues but also carries notable safety concerns, including movement disorders and psychiatric symptoms. The D1 and D5 receptor subtypes share significant sequence homology and pharmacological properties but differ somewhat in anatomical distribution and functional roles[2][5][7].

Other names

D1-like dopamine receptorsD1-family dopamine receptorsDopamine receptor D1 (DRD1)Dopamine receptor D5 (DRD5)

Agonists: stimulate Gs-coupled GPCR pathway, increase cAMP, activate PKA, influence gene transcription and neuronal firing Antagonists: prevent dopamine binding, block signal transduction Indirect agonists: increase availability of dopamine at the synapse (e.g., amphetamine, cocaine)