Cariprazine is a D2 and D3 receptor partial agonist, with high selectivity towards the D3 receptor. Cariprazine exhibits high affinity for the D3 (Ki=0.085 nM) and D2 (Ki=0.49 nM) receptors, and moderate affinity for the 5-HT1A receptor (Ki=2.6 nM). Cariprazine has lower affinity at human and rat hippocampal 5-HT1A receptors (pKi 8.59 and 8.34, respectively) and demonstrates low intrinsic efficacy. Administration of Cariprazine (30 µg/kg) reduces the striatal uptake of both radioligands to the level of nonspecific binding compared with baseline PET measurements.
|Body Surface Area (m2)||0.007||0.025||0.15||0.05||0.02||0.5|
|Animal A (mg/kg) = Animal B (mg/kg) multiplied by||Animal B Km|
|Animal A Km|
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
|Solubility||DMSO 10 mM|
 Nicholas Seneca, et al. Psychopharmacology (Berl). Occupancy of Dopamine D₂ and D₃ and Serotonin 5-HT₁A Receptors by the Novel Antipsychotic Drug Candidate, Cariprazine (RGH-188), in Monkey Brain Measured Using Positron Emission Tomography
 Bela Kiss, et al. J Pharmacol Exp Ther. Cariprazine (RGH-188), a Dopamine D(3) Receptor-Preferring, D(3)/D(2) Dopamine Receptor Antagonist-Partial Agonist Antipsychotic Candidate: In Vitro and Neurochemical Profile
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