PMID- 16219299 OWN - NLM STAT- MEDLINE DCOM- 20051220 LR - 20131121 IS - 0006-2952 (Print) IS - 0006-2952 (Linking) VI - 70 IP - 11 DP - 2005 Nov 25 TI - Inhibition of store-operated calcium entry-mediated superoxide generation by histamine trifluoromethyltoluide independent of histamine receptors. PG - 1613-22 AB - Store-operated calcium entry (SOCE) plays an important role in shaping the Ca(2+) response of various tissues and cell types. In this report, we show that thapsigargin (TG)-induced SOCE was inhibited by the histamine receptor agonist, histamine-trifluoromethyltoluide (HTMT), in U937 and HL-60 human promyelocytes. Preincubation of HTMT resulted in a significant inhibition of subsequent TG-induced Ca(2+) elevation without affecting Ca(2+) release from intracellular stores. HTMT also inhibited TG-induced Ca(2+) current and Ba(2+)/Mn(2+) influx in a concentration-dependent manner. In contrast with HTMT, other H1 histamine receptor agonists, histamine, 2-methylhistamine and 2-thiazolylethylamine, did not affect TG-induced SOCE. In addition, HTMT also attenuated TG-induced cytosolic superoxide generation. Taken together, our data clearly suggest that the anti-inflammatory effect of HTMT may occur through direct inhibition of SOCE. FAU - Kim, Dong-Chan AU - Kim DC AD - Division of Molecular and Life Science, SBD-NCRC, Pohang University of Science and Technology, Pohang 790-784, POSTECH, San 31, Hyoja Dong, South Korea. FAU - Lee, So-Young AU - Lee SY FAU - Jun, Dong-Jae AU - Jun DJ FAU - Kim, Sun-Hee AU - Kim SH FAU - Lee, Jong-Hee AU - Lee JH FAU - Hur, Eun-Mi AU - Hur EM FAU - Baek, Nam-In AU - Baek NI FAU - Kim, Kyong-Tai AU - Kim KT LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20051010 PL - England TA - Biochem Pharmacol JT - Biochemical pharmacology JID - 0101032 RN - 0 (Histamine Antagonists) RN - 0 (Receptors, Histamine) RN - 103827-16-3 (histamine trifluoromethyl-toluidide) RN - 11062-77-4 (Superoxides) RN - 820484N8I3 (Histamine) RN - SY7Q814VUP (Calcium) SB - IM MH - Calcium/*metabolism MH - HL-60 Cells MH - Histamine/*analogs & derivatives/pharmacology MH - Histamine Antagonists/*pharmacology MH - Humans MH - Receptors, Histamine/metabolism MH - Superoxides/*metabolism MH - U937 Cells EDAT- 2005/10/13 09:00 MHDA- 2005/12/21 09:00 CRDT- 2005/10/13 09:00 PHST- 2005/08/15 00:00 [received] PHST- 2005/09/02 00:00 [revised] PHST- 2005/09/06 00:00 [accepted] PHST- 2005/10/13 09:00 [pubmed] PHST- 2005/12/21 09:00 [medline] PHST- 2005/10/13 09:00 [entrez] AID - S0006-2952(05)00587-3 [pii] AID - 10.1016/j.bcp.2005.09.001 [doi] PST - ppublish SO - Biochem Pharmacol. 2005 Nov 25;70(11):1613-22. doi: 10.1016/j.bcp.2005.09.001. Epub 2005 Oct 10.