Diclofenac is a non-selective COX inhibitor.^1,2,3 It inhibits human COX-1 and -2 with IC₅₀ values of 0.9-2.7 and 1.5-20 µM, respectively.^1,2 Diclofenac inhibits ovine COX-1 and -2 with IC₅₀ values of 60 and 220 nM, respectively.³

1 Laneuville, O., Breuer, D.K., DeWitt, D.L., et al. Differential inhibition of human prostaglandin endoperoxide H synthases-1 and -2 by nonsteroidal anti-inflammatory drugs. J Pharmacol Exp Ther 271 927-934 (1994).

2 Barnett, J., Chow, J., Ives, D., et al. Purification, characterization and selective inhibition of human prostaglandin G/H synthase 1 and 2 expressed in the baculovirus system. Biochim Biophys Acta 1209 130-139 (1994).

3 Johnson, J.L., Wimsatt, J., Buckel, S.D., et al. Purification and characterization of prostaglandin H synthase-2 from sheep placental cotyledons. Arch Biochem Biophys 324 26-34 (1995).

Barnett, J., Chow, J., Ives, D., et al. Purification, characterization and selective inhibition of human prostaglandin G/H synthase 1 and 2 expressed in the baculovirus system. Biochim Biophys Acta 1209 130-139 (1994).

Johnson, J.L., Wimsatt, J., Buckel, S.D., et al. Purification and characterization of prostaglandin H synthase-2 from sheep placental cotyledons. Arch Biochem Biophys 324 26-34 (1995).

Laneuville, O., Breuer, D.K., DeWitt, D.L., et al. Differential inhibition of human prostaglandin endoperoxide H synthases-1 and -2 by nonsteroidal anti-inflammatory drugs. J Pharmacol Exp Ther 271 927-934 (1994).

Diclofenac (sodium salt) is available in the following screening library:

• Bio-active Lipid I Screening Library (96-Well)