Title : Suppression of TNF-alpha secretion by azelastine in a rat mast (RBL-2H3) cell line: evidence for differential regulation of TNF-alpha release, transcription, and degranulation.

Pub. Date : 1997 Sep 15

PMID : 9300717






6 Functional Relationships(s)
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1 Suppression of TNF-alpha secretion by azelastine in a rat mast (RBL-2H3) cell line: evidence for differential regulation of TNF-alpha release, transcription, and degranulation. azelastine tumor necrosis factor Rattus norvegicus
2 In a rat mast RBL-2H3 cell line, azelastine inhibited Ag- and ionomycin-induced TNF-alpha release with IC50 values of 25.7 +/- 3.4 microM and 1.66 +/- 0.45 microM, respectively. azelastine tumor necrosis factor Rattus norvegicus
3 In Ag-stimulated cells, azelastine also inhibited TNF-alpha mRNA expression, TNF-alpha protein synthesis and release, and, possibly related to these effects, Ca2+ influx. azelastine tumor necrosis factor Rattus norvegicus
4 In Ag-stimulated cells, azelastine also inhibited TNF-alpha mRNA expression, TNF-alpha protein synthesis and release, and, possibly related to these effects, Ca2+ influx. azelastine tumor necrosis factor Rattus norvegicus
5 In ionomycin-stimulated cells, however, azelastine inhibited TNF-alpha release to a greater extent than mRNA expression/protein synthesis and Ca2+ influx, suggesting that azelastine inhibits the release process more potently than transcription or production of TNF-alpha by interfering with a signal other than Ca2+. azelastine tumor necrosis factor Rattus norvegicus
6 Azelastine added 1 h after ionomycin stimulation also immediately blocked subsequent release of TNF-alpha, which had been produced in the cells, without affecting Ca2+ influx. azelastine tumor necrosis factor Rattus norvegicus