In vitro: RVT-501 potently and selectively inhibits human PDE4 activity with an IC50 of 2.8 nM and suppresses the production of various cytokines from human lymphocytes and monocytes with IC50 values ranging from 0.49 to 3.1 nM.
In vivo: RVT-501 is currently in phase 2 development for patients with mild-to-moderate atopic dermatitis. In mice models, the topical application of RVT-501 produces an immediate antipruritic effect as well as an anti-inflammatory effect with reduced expression of cytokines/adhesion molecules. On the basis of these observed effects, topical RVT-501 ameliorates the appearance of atopic dermatitis-like skin lesions in two types of AD models, hapten- and mite-elicited models, exhibiting inhibitory effects comparable to that of tacrolimus.
|Animal models||NC/Nga mice|
|Formulation||4% SDS solution|
|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||100 mg/mL in DMSO|
Validation of a UPLC-MS/MS method for the simultaneous determination of E6005, a phosphodiesterase 4 inhibitor, and its metabolite in human plasma.
Mano Y, et al. J Chromatogr B Analyt Technol Biomed Life Sci. 2015 Aug 15;998-999:31-9. PMID: 26149248.
Antipruritic effect of the topical phosphodiesterase 4 inhibitor E6005 ameliorates skin lesions in a mouse atopic dermatitis model.
Ishii N, et al. J Pharmacol Exp Ther. 2013 Jul;346(1):105-12. PMID: 23674603.
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