| Bioactivity | PD-168077 maleate is a selective dopamine D4 receptor agonist, with a Ki of 9 nM. |
| Target | Ki: 9 nM (Dopamine D4 receptor). |
| Invitro | PD-168077 is one of the first agents to be identified as putative selective D4 agonists. It shows >100-fold selectivity over other members of the D2-like receptor family and over their D1-like counterparts; PD-168077 shows a 20-fold selectivity over α1, and α2, a 45-fold selectivity over 5-HT1A, and a 460-fold selectivity over 5-HT2A receptors; PD-168077 evidences intrinsic activity at the D4 receptor in terms of quinpirole-like inhibition of forskolin-stimulated cAMP accumulation or stimulation of [3H]thymidine uptake in CHO cells expressing the human D4 receptor[1]. In the PD-168077-treated cell, p-CaMKII exhibits a significantly increased clustering at synaptic sites, as indicated by the enhanced colocalization with PSD-95[2]. |
| In Vivo | PD-168077 (0.2-25.0 mg/kg) dose-dependently induces locomotion, which takes an unusual and characteristic ”shuffling” form with uncoordinated movements together with yawning, and episodes of myoclonic jerking; grooming, and rearing are reduced[1]. |
| Name | PD-168077 maleate |
| CAS | 630117-19-0 |
| Formula | C24H26N4O5 |
| Molar Mass | 450.49 |
| Appearance | Solid |
| Transport | Room temperature in continental US; may vary elsewhere. |
| Storage | 4°C, sealed storage, away from moisture *In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture) |
| Reference | [1]. Clifford JJ, et al. Topographically based search for an "Ethogram" among a series of novel D(4) dopamine receptor agonists and antagonists. Neuropsychopharmacology. 2000 May;22(5):538-44. [2]. Gu Z, et al. Activation of dopamine D4 receptors induces synaptic translocation of Ca2+/calmodulin-dependent protein kinase II in cultured prefrontal cortical neurons. Mol Pharmacol. 2006 Mar;69(3):813-22. |