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Dopamine receptor agonists and antagonists act on the five G protein-coupled receptors that respond to dopamine. The receptors form two groups, with D1 and D5 in the D1-like class and D2, D3 and D4 in the D2-like class. D1-like receptors stimulate adenylyl cyclase, whereas D2-like receptors inhibit it and lower cyclic adenosine monophosphate (cAMP) levels. Dopamine signaling controls movement, reward, motivation and hormone release, and is studied in Parkinson's disease and psychiatric research. Ligands here include the agonist rotigotine HCl, the D2 antagonists L-741626 and domperidone, and the D3-preferring ligand BP897.
D3R ligand 1 is a potent and selective antagonist targeting the dopamine receptor D3R, with a Ki value of 66 nM. Utilizing a THPB template, this compound effectively inhibits both G-protein- and β-arrestin-mediated signaling pathways. D3R ligand 1 is valuable for researchers investigating dopamine receptor signaling and its implications in neuropharmacology.
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A-77636 is a potent and selective orally active agonist of the dopamine D1 receptor, demonstrating a pEC50 of 8.13 and an EC50 of 1.1 nM. It exhibits a high affinity for the dopamine D1 receptor with a pKi value of 7.40 ± 0.09 (Ki = 39.8 nM). Due to its pharmacological profile, A-77636 is primarily utilized in research related to Parkinson's disease and other dopamine-related disorders.
A-69024 is a selective antagonist of the dopamine D-1 receptor, demonstrating a Ki value of 12.6 nM for D-1 and a significantly higher Ki value of 1290 nM for the D-2 receptor. This compound's specificity enables researchers to investigate the role of dopamine D-1 receptor modulation in various neurological and psychiatric disorders. A-69024 is valuable for studies examining dopamine-related pathways and potential therapeutic approaches.
UNC9975 is a D2 receptor (D2R) agonist that demonstrates signaling bias through β-arrestin-mediated pathways while also acting as an antagonist of Gi-regulated cAMP production and a partial agonist for D2R/β-arrestin-2 interactions. This compound is valuable for research in antipsychotic drug development, facilitating the exploration of novel therapeutic approaches targeting dopaminergic signaling.
Noncatechol agonist-1 is a potent noncatechol agonist primarily targeting the dopamine D1 receptor (D1R). It demonstrates full efficacy in activating both the D1R-G protein and D1R-β-arrestin2 pathways, with pEC50 values of 8.41 for D1R-mediated cAMP production and 7.7 for β-arrestin2 recruitment. This compound is valuable for research applications investigating dopamine signaling and its implications in neurobiology and pharmacology.
Synonyms: YM435 free base
Zelandopam free base is a specific agonist of the dopamine D1 receptor, demonstrating notable renal vasodilatory effects. This compound is effective in mitigating acute renal failure induced by Cisplatin, making it a valuable tool for research investigating renal protection and dopamine receptor signaling. Its oral bioactivity further enhances its utility in pharmacological studies related to renal function and neurotransmitter interactions.
SKF 38393 is a selective agonist of the dopamine D1 receptor that activates the cAMP signaling pathway, enhancing dopamine release in the developing rat striatum. This compound has been shown to inhibit the proliferation of MCF-7 breast cancer cells with an IC50 of 0.1 μM. SKF 38393 is instrumental in research focused on neurodevelopmental disorders, dopamine-related diseases such as Parkinson's, and cancer biology.
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Synonyms: 7-OH-DPAT
7-Hydroxy-DPAT is a selective agonist of the D3 dopamine receptor, known for its ability to modulate locomotor behavior and influence dopamine metabolism in the brain. This compound demonstrates significant pharmacological activity that can be utilized in research focused on neurological diseases and disorders. Its selectivity for the D3 receptor makes it a valuable tool for studies investigating dopamine-related pathways and their implications in various neurological conditions.
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OS-3-106 is a potent and selective agonist of the dopamine D3 receptor (D3R), demonstrating a high binding affinity with a Ki value of 0.2 nM. This compound serves as a valuable tool in the study of D3R-mediated pathways, particularly in the context of psychoactive substance addiction research. Its specificity and efficacy make it suitable for exploring mechanisms underlying dopamine signaling and addiction-related behaviors.
SKF83822 hydrobromide is a potent agonist of the dopamine D1 receptor, primarily engaging Gs/olf signaling pathways to activate adenylyl cyclase. It is effective in stimulating intracellular cAMP production, making it a valuable tool for research in neuropharmacology and the study of dopamine-related disorders. Its selectivity for D1 receptors over PLC-coupled D1-like receptors underscores its utility in elucidating D1-mediated signaling processes.
PF-00217830 is a selective agonist of the dopamine D2 receptor, demonstrating substantial efficacy in modulating dopaminergic signaling. It has been shown to inhibit spontaneous locomotor activity as well as reduce 2,5-dimethoxy-4-iodoamphetamine-induced head twitches in rodent models. This compound is valuable for studying the role of dopamine in neuropharmacology and assessing potential therapeutic strategies for disorders associated with dopamine dysregulation.
Dopamine D2 receptor antagonist-3 is a selective antagonist of the dopamine D2 receptor, displaying a pIC50 of 5.52. This compound demonstrates antipsychotic effects, evidenced by its ability to reduce apomorphine-induced agitation in rat models. It is a valuable tool for research into psychiatric and neurological disorders, facilitating the study of dopaminergic signaling pathways and potential therapeutic interventions.
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L-750667 triHydrochloride is a selective antagonist of the D4 dopamine receptor, exhibiting a Ki value of 0.51 nM. Its radiolabeled derivative, [125I]L-750667, demonstrates a Kd of 0.16 nM for D4 receptor binding. This compound is capable of reversing dopamine-induced inhibition of cAMP accumulation, making it a valuable tool for investigating the distribution and function of D4 dopamine receptors in the central nervous system. L-750667 triHydrochloride has significant applications in neuroscience and psychiatry research.
SV 293 is a selective antagonist that primarily targets dopamine D2 receptors with a binding affinity that is 100-fold greater than that of D3 and D4 receptor subtypes. This compound exhibits neutral antagonist activity and effectively blocks the effects of the full agonist quinpirole in forskolin-dependent adenylate cyclase inhibition assays and electrophysiological assays. SV 293 serves as a valuable pharmacological tool for investigating the role of D2-like receptor subtypes in dopamine-related pathways associated with neurological, neuropsychiatric, and movement disorders.
LY 171859 is a selective D2 receptor agonist that also displays notable reductase activity. This compound demonstrates enzymatic function within the cytoplasm of various tissues, including liver, lung, and kidney, and exhibits significant reductase activity in both rat and human blood. The reduction process mediated by LY 171859 is NADPH-dependent, with an apparent Km of 14.8 μM, and specifically incorporates the A-side hydrogen of NADPH into the reaction product. Additionally, this compound's enzymatic activity is sensitive to inhibition by cyanide and thiol reagents, making it a useful tool for studying dopamine receptor signaling and associated metabolic pathways.
MOR agonist-2 is a potent agonist of the mu-opioid receptor (MOR) with a Ki value of 564 nM, and it acts as an antagonist at the dopamine D3 receptor (D3R) with a Ki of 7.26 nM. This compound exhibits analgesic properties through its partial agonism at MOR, making it a valuable tool for research in pain management. Additionally, its D3R antagonism may help mitigate opioid misuse liability, offering potential therapeutic benefits in addiction studies.
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Vanicoside E is an antioxidant and antitumor agent that targets L-Tyrosine and L-DOPA, demonstrating inhibitory activity with IC50 values of 45.23 μM and 189.96 μM, respectively. This compound is utilized in research focused on oxidative stress and tumor biology, making it valuable in studies aimed at understanding cancer progression and developing therapeutic strategies. Its properties support investigations into the modulation of key biochemical pathways relevant to tumor growth and survival.
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BRL 34778 is a highly selective dopamine D2 receptor antagonist with a Ki value of 2.14 nM, demonstrating significant potency in receptor inhibition. It exhibits antipsychotic properties while minimizing extrapyramidal side effects and sedation. This compound is valuable for investigating neurological disorders, particularly schizophrenia, and contributes to research focused on the modulation of dopaminergic pathways in the brain.
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Synonyms: YM435 anhydrous
Zelandopam anhydrous is a selective agonist of the dopamine D1 receptor, exhibiting potent renal vasodilatory effects. This compound demonstrates significant potential in alleviating acute renal failure induced by Cisplatin. It is valuable for research in nephrology and may aid in exploring therapeutic approaches for renal pathologies.
Isoremoxipride is a dopamine antagonist that selectively targets the dopamine D2 receptor. This 3-methoxy isomer demonstrates significant affinity for the receptor, making it a valuable tool for investigating dopamine-related pathways. Its research applications include studies on neuropsychiatric disorders and the role of dopamine in various neurological conditions.
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D4R antagonist-1 is a selective antagonist of the dopamine D4 receptor (D4R) with an IC50 of 6.87 µM. This compound exhibits significant potential for use in research related to neurological disorders, including Parkinson's disease. Its ability to modulate D4R activity makes it a valuable tool for investigating the role of dopamine signaling in various physiological and pathological processes.
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Synonyms: rel-LY 171555 dihydrochloride; rel-LY 141865 dihydrochloride
rel-Quinpirole dihydrochloride is a selective dopamine D2 receptor agonist that acts primarily on the D2R target. This compound exhibits significant biological activity in modulating dopamine signaling pathways and is utilized in research applications related to neurological diseases, including Parkinson's disease and schizophrenia. Its use can facilitate the investigation of dopaminergic functions and the development of potential therapeutic strategies.
Synonyms: (+)-AJ 76; (1S,2R)-AJ 76
AJ-76, classified as a dopamine autoreceptor antagonist, plays a crucial role in modulating dopamine levels in the brain. Research shows that AJ-76 enhances the synthesis and turnover of dopamine while exhibiting minimal influence on serotonin and norepinephrine activity. Additionally, AJ-76 effectively counteracts the sedative effects associated with low-dose apomorphine and demonstrates a modest antagonistic effect at postsynaptic dopamine receptors, making it a valuable tool for research in neuropharmacology and the study of dopamine-related disorders.
Lergotrile is a potent, orally active dopamine agonist that functions primarily as a prolactin secretion inhibitor. It exerts its biological activity by activating adenohypophyseal dopamine receptors, leading to the inhibition of prolactin release from the pituitary gland. This compound holds potential for research applications related to Parkinson's disease and other dopaminergic disorders.
Synonyms: Ro 22-1319
Piquindone is a potent antipsychotic agent that primarily targets the D2 dopaminergic receptor subtype, exhibiting sodium-dependent binding characteristics. This compound demonstrates significant biological activity relevant to the modulation of dopaminergic signaling and is utilized in research focused on schizophrenia and related neuropsychiatric disorders.
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