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    InvivoChem Cat #: V4426
    CAS #: 1435467-38-1Purity ≥98%

    Description: PF-1355 (also known as PF-06281355), a 2-thiouracil analog, is a novel, potent, selective and orally bioavailable mechanism-based MPO inhibitor  used for treatment of vasculitic diseases. MPO is a critical mediator of vasculitis in mouse disease models. MPO has been associated with vasculitis, disseminated vascular inflammation typically involving pulmonary and renal microvasculature and often resulting in critical consequences. MPO contributes to vascular injury by 1) catabolizing nitric oxide, impairing vasomotor function; 2) causing oxidative damage to lipoproteins and endothelial cells, leading to atherosclerosis; and 3) stimulating formation of neutrophil extracellular traps, resulting in vessel occlusion and thrombosis.  A pharmacokinetic/pharmacodynamic response model of PF-1355 exposure in relation with MPO activity was derived from mouse peritonitis. The contribution of MPO activity to vasculitis was then examined in an immune complex model of pulmonary disease. Oral administration of PF-1355 reduced plasma MPO activity, vascular edema, neutrophil recruitment, and elevated circulating cytokines. In a model of anti-glomerular basement membrane disease, formerly known as Goodpasture disease, albuminuria and chronic renal dysfunction were completely suppressed by PF-1355treatment. This study shows that MPO activity is critical in driving immune complex vasculitis and provides confidence in testing the hypothesis that MPO inhibition will provide benefit in treating human vasculitic diseases. 

    References:  2015 May;353(2):288-98. 

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    Name: PF-06281355
    CAS#: 1435467-38-1
    Chemical Formula: C14H15N3O4S
    Exact Mass: 321.0783
    Molecular Weight: 321.351
    Elemental Analysis: C, 52.33; H, 4.71; N, 13.08; O, 19.91; S, 9.98
    Storage-20℃ for 3 years in powder form
    -80℃ for 2 years in solvent
    Technical InformationSynonym: PF-1355; PF 1355; PF1355; PF-06281355; PF 06281355; PF06281355;
    IUPAC/Chemical Name: 2-(6-(2,5-Dimethoxyphenyl)-4-oxo-2-thioxo-3,4-dihydropyrimidin-1(2H)-yl)acetamide
    InChi Code: InChI=1S/C14H15N3O4S/c1-20-8-3-4-11(21-2)9(5-8)10-6-13(19)16-14(22)17(10)7-12(15)18/h3-6H,7H2,1-2H3,(H2,15,18)(H,16,19,22)
    SMILES Code: O=C(N)CN(C(N1)=S)C(C2=CC(OC)=CC=C2OC)=CC1=O

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    Determination of potency and reversibility of PF-1355 for MPO inhibition.  2015 May;353(2):288-98.


    PF-1355 and MPO deficiency protects in immune complex–induced pulmonary vasculitis.  2015 May;353(2):288-98.


    Establishing a pharmacokinetic/pharmacodynamic relationship between plasma [PF-1355] and MPO inhibition in a mouse peritonitis model.


    MPO activity is essential for disease induction in a model of anti-GBM glomerulonephritis.


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