SCH-23390 maleate  (Synonyms: R-(+)-SCH-23390 maleate)

SCH-23390 maleate (R-(+)-SCH-23390 maleate) is a potent and selective dopamine D₁-like receptor antagonist with K_is of 0.2 nM and 0.3 nM for the D₁ and D₅ receptor, respectively. SCH-23390 maleate is a potent and high efficacy human 5-HT_2C receptor agonist with a K_i of 9.3 nM. SCH-23390 maleate also binds with high affinity to the 5-HT₂ and 5-HT_1C receptors. SCH-23390 maleate inhibits G protein-coupled inwardly rectifying potassium (GIRK) channels with an IC₅₀ of 268 nM^[1][2][3].

SCH-23390 (1 μM) treatment reverses the inhibitory effects of Isosibiricin on NLRP3 expression and the cleavages of caspase-1 and IL-1β in the LPS-induced BV-2 cells. SCH-23390 could reverse the Isosibiricin-mediated inhibition of the NLRP3/caspase-1 inflammasome pathway^[4].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

SCH-23390 can abolish generalized seizures evoked by the chemoconvulsants: pilocarpine and soman. SCH-23390 has also been used in studies of other neurological disorders in which the dopamine system has been implicated, such as psychosis and Parkinson's disease. Apart from the study of neurological disorders, SCH-23390 has been extensively used as a tool in the topographical determination of brain D₁ receptors in rodents, nonhuman primates, and humans^[1].
SCH-23390 is a very short-acting compound with an elimination half-life of around 25 min following administration of 0.3 mg/kg i.p. in the rat^[1].
SCH-23390 augments dopamine-induced ductus constriction in CD-1 mouse vessels under newborn O₂ conditions^[5].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

403.86

C₂₁H₂₂ClNO₅

87134-87-0

Room temperature in continental US; may vary elsewhere.

Please store the product under the recommended conditions in the Certificate of Analysis.

• [1]. Bourne JA. SCH 23390: the first selective dopamine D1-like receptor antagonist. CNS Drug Rev. 2001 Winter;7(4):399-414.  [Content Brief]

  [2]. Millan MJ, et al. The "selective" dopamine D1 receptor antagonist, SCH23390, is a potent and high efficacy agonist at cloned human serotonin2C receptors. Psychopharmacology (Berl). 2001 Jun;156(1):58-62.  [Content Brief]

  [3]. Kuzhikandathil EV, et al. Classic D1 dopamine receptor antagonist R-(+)-7-chloro-8-hydroxy-3-methyl-1-phenyl-2,3,4,5-tetrahydro-1H-3-benzazepine hydrochloride (SCH23390) directly inhibits G protein-coupled inwardly rectifying potassium channels. Mol Pharm  [Content Brief]

  [4]. Wang YH, et al. Isosibiricin inhibits microglial activation by targeting the dopamine D1/D2 receptor-dependent NLRP3/caspase-1 inflammasome pathway. Acta Pharmacol Sin. 2020 Feb;41(2):173-180.  [Content Brief]

  [5]. Crockett SL, et al. Role of dopamine and selective dopamine receptor agonists on mouse ductus arteriosus tone and responsiveness. Pediatr Res. 2019 Dec 9.  [Content Brief]