Abstract
Although acetaminophen and phenacetin do not inhibit PG synthesis when added directly to isolated rat platelets and when given orally, both drugs inhibit carrageenan-induced hindpaw edema — a widely used inflammatory assay method. It does not appear that the anti-inflammatory effects of these non-steroidal drugs (unlike other well-known non-steroidal drugs) can be explained on the basis of PG-synthetase inhibition.
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References
R.L. Flower andJ.R. Vanè,Inhibition of Prostaglandin Synthetase in Brain Explains the Antipyretic Activity of Paracetamol (4-Acetamidophenol), Nature (Lond.)240, 410 (1972).
D.M. Woodbury, in:The Pharmacological Basis of Therapeutics, (Eds. L.S. Goodman and A. Gilman; 4th Ed. Macmillan, N.Y., 1970).
F.A. Kuehl, J.L. Humes, R.W. Egan, E.A. Ham, G.C. Beveridge andC.G. Van Arman,Role of Prostaglandin Endoperoxide PGG 2 in Inflammatory Processes, Nature (Lond.)265, 170 (1977).
Ralph Vinegar, J.F. Truax andJ.L. Selph,Quantitative Comparison of the Analgesic Anti-Inflammatory Activities of Aspirin, Phenacetin, and Acetaminophen in Rodents, Eur. J. Pharmac.37, 23 (1976).
K.T. Kirton, J.C. Cornette andK.L. Barr,Characterization of Antibody to Prostaglandin F 2α , Biochem. Biophys. Res. Comm.47, 903 (1971).
E.M. Glenn, D. Rector, B.J. Bowman andN.A. Rohloff,Urea Compounds that Increase PG Biosynthesis In Vitro-In Vivo, Agents and Actions (in press) (1977).
E.M. Glenn, J. Wilks andB.J. Bowman,Platelets, Prostaglandins, Red Cells, Sedimentation Rates, Serum and Tissue, Proteins and Non-Steroidal Anti-inflammatory Agents, Proc. Soc. Exp. Biol. Med.141, 879 (1973).
F.A. Fitzpatrick andM.A. Wynalda,In Vivo Suppression of Prostaglandin Biosynthesis by Non-steroidal Anti-inflammatory Agents, Prostaglandins12, (6) (1976).
K.D. Rainsford andK. Brune,Role of the Parietal Cell in Gastric Damage Induced by Aspirin and Related Drugs: Implications for Safer Therapy, Med. J. Aust.1, 881 (1976).
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Glenn, E.M., Bowman, B.J. & Rohloff, N.A. Anti-inflammatory and PG inhibitory effects of phenacetin and acetaminophen. Agents and Actions 7, 513–516 (1977). https://doi.org/10.1007/BF02111123
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DOI: https://doi.org/10.1007/BF02111123