GW842166X shows similar potency and efficacy for rat and human recombinant CB2 receptors with EC50 of 91 nM and 63nM, respectively. GW842166X exhibits full agonist potency with an EC50 of 133 nM and Emax of 101% in cyclase assays. GW842166X exhibits weak agonist potency with an EC50 of 7.780 μM and Emax of 84% in FLIPR assays.GW842166X has an oral bioavailability of 58% and a half-life of 3 h when dosed orally in the rat. GW842166X has extremely high potency with an oral ED50 of 0.1 mg/kg and shows full reversal of hyperalgesia at 0.3 mg/kg in the FCAa model of inflammatory pain. GW842166X orally administrated at a dose of 15 mg/kg for 8 days produced a significant reversal of the CCI induced decrease in paw withdrawal threshold in a rat model of neuropathic pain.
|Animal models||rat model of neuropathic pain|
|Administration||Orally administrated once daily for 8 days|
|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 resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 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 resveratrol of 11.2 mg/kg.
|Solubility||DMSO 10 mg/mL|
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