PMID- 1361317 OWN - NLM STAT- MEDLINE DCOM- 19930121 LR - 20190503 IS - 0003-4967 (Print) IS - 1468-2060 (Electronic) IS - 0003-4967 (Linking) VI - 51 IP - 11 DP - 1992 Nov TI - Sulphasalazine inhibition of human granulocyte activation by inhibition of second messenger compounds. PG - 1230-6 AB - The effects of sulphasalazine on the production of second messenger compounds in human granulocytes have been characterised by various stimuli. The increases in cytosolic calcium, inositol trisphosphate, diacylglycerol, and phosphatidic acid (all important mediators of intracellular signal transduction) triggered by stimulation were inhibited by sulphasalazine. The metabolites 5-amino-salicylic acid and sulphapyridine were less potent inhibitors than the mother compound. It is concluded that sulphasalazine inhibits the synthesis of phosphoinositide derived second messenger compounds at the level of phospholipase C or its regulatory guanosine 5'-triphosphate (GTP) binding protein. Inhibition of phosphatidic acid synthesis was either due to the same mechanism, or to interaction with a phospholipase D regulating GTP binding protein. FAU - Carlin, G AU - Carlin G AD - Department of Pharmacology, Kabi Pharmacia Therapeutics, Uppsala, Sweden. FAU - Djursater, R AU - Djursater R FAU - Smedegard, G AU - Smedegard G LA - eng PT - Journal Article PL - England TA - Ann Rheum Dis JT - Annals of the rheumatic diseases JID - 0372355 RN - 0 (Aminosalicylic Acids) RN - 0 (Phosphatidic Acids) RN - 0 (Phosphatidylinositols) RN - 3XC8GUZ6CB (Sulfasalazine) RN - 4Q81I59GXC (Mesalamine) RN - 85166-31-0 (Inositol 1,4,5-Trisphosphate) RN - 86-01-1 (Guanosine Triphosphate) RN - SY7Q814VUP (Calcium) RN - Y5V2N1KE8U (Sulfapyridine) SB - IM MH - Aminosalicylic Acids/pharmacology MH - Calcium/metabolism MH - Cells, Cultured MH - Cytosol/metabolism MH - Depression, Chemical MH - Granulocytes/drug effects/*metabolism/physiology MH - Guanosine Triphosphate/pharmacology MH - Humans MH - Inositol 1,4,5-Trisphosphate/biosynthesis MH - Mesalamine MH - Phosphatidic Acids/biosynthesis MH - Phosphatidylinositols/*metabolism MH - Second Messenger Systems/*drug effects MH - Sulfapyridine/pharmacology MH - Sulfasalazine/*pharmacology PMC - PMC1012461 EDAT- 1992/11/01 00:00 MHDA- 1992/11/01 00:01 PMCR- 1995/11/01 CRDT- 1992/11/01 00:00 PHST- 1992/11/01 00:00 [pubmed] PHST- 1992/11/01 00:01 [medline] PHST- 1992/11/01 00:00 [entrez] PHST- 1995/11/01 00:00 [pmc-release] AID - 10.1136/ard.51.11.1230 [doi] PST - ppublish SO - Ann Rheum Dis. 1992 Nov;51(11):1230-6. doi: 10.1136/ard.51.11.1230.