PF-03715455 is a potent inhaled p38 MAPK inhibitor. PF-03715455 shows some selectivity for p38α over p38β with respective IC50 values of 0.88 and 23 nM. PF-03715455 potently inhibits LPS-induced TNFα production in human whole blood (IC50=1.7 nM). PF-03715455 has potential for the treatment of COPD (chronic obstructive pulmonary disease)[1][2].PF-03715455 is a moderate inhibitor of CYP1A2, CYP2C19, and CYP2D6 and a potent inhibitor of CYP’s 2C9 and CYP3A4[2].PF-03715455 treatment shows that the Vss and T1/2 are 0.19 L/kg, 1 hour, respectively[2]. Animal Model: Male CD Sprague Dawley rats (300-450 g)[2] Dosage: 1 mg/kg Administration: I.v. (Pharmacokinetic Analysis) Result: The Vss, and T1/2 were 0.19 L/kg, 1 hour, respectively.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.

[1]. Norman P, et al. Investigational p38 inhibitors for the treatment of chronic obstructive pulmonary disease. Expert Opin Investig Drugs. 2015 Mar;24(3):383-92. [2]. Millan DS, et al. Design and synthesis of inhaled p38 inhibitors for the treatment of chronic obstructive pulmonary disease. J Med Chem. 2011 Nov 24;54(22):7797-814.