3,7-Dihydro-3,7-dimethyl-1-(5-oxohexyl)-1H-purine-2,6-dione PTX White crystalline solid. A non-selective phosphodiesterase inhibitor. Inhibits endotoxin-induced synthesis of tumor necrosis factor-a (TNF-a). PTX inhibits the adhesion of T cells to the b1 and b2 integrin ligands VCAM-1 and ICAM-1. Also prevents the down-regulation of microsomal cytochrome P450 caused by lipopolysaccharides. Purity: ≥99% by titration. Contaminants: Heavy metals: ≤10 ppm. RTECS XH2475000, CAS 6493-05-6. Merck Index: 14, 7136 Ref.: Gonzalez-Amaro, R., et al. 1998. J. Immunol. 161, 65. Monshouwer, M., et al. 1996. Biochem. Pharmacol. 52, 1195. Rosenthal, L.A., et al. 1992. J. Interferon. Res. 12, 403. Zabel, P., et al. 1992. Immun. Infekt. 20, 80. Thiel, M., et al. 1991. Biochem. Res. Biophys. Commun. 180, 53. R: 22; S: 36 |