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• W2079475051 abstract "TA-270 (4-hydroxy-1-methyl-3-octyloxy-7-sinapinoylamino-2(1H)-quinolinone) is a novel quinolinone derivative that has been demonstrated to possess an anti-oxidative activity against peroxynitrite, a potent oxidant, that is generated by the reaction of nitric oxide with superoxide anions. The current study describes the inhibitory effect of TA-270 on the biphasic nasal blockage induced by repeated antigen challenge in an allergic rhinitis guinea pig model. In the present in vitro study, TA-270 potently inhibited the oxidative reaction induced by peroxynitrite (IC50 = 79 nM). In addition, TA-270 (0.3–30 mg/kg, p.o.) dose-dependently inhibited peroxynitrite (3 mM, 10 μl/nostril)-induced nasal blockage in guinea pigs. In the antigen-induced allergic rhinitis model, TA-270 (0.3, 3, and 30 mg/kg, p.o.) given 1 h before the antigen challenge suppressed early phase nasal blockage by 36%, 42%, and 63%, respectively. Furthermore, TA-270 (0.3, 3, and 30 mg/kg, p.o.) showed a relatively strong suppression of late phase nasal blockage (39%, 62%, and 72%, respectively). The late phase nasal blockage was significantly inhibited (61%) even when TA-270 (30 mg/kg, p.o.) was administered 18 h before the antigen challenge. In conclusion, TA-270 improved antigen-induced nasal blockage, probably through its peroxynitrite scavenging action, and the effect was sustained for at least 18 h. Thus, TA-270 would be expected to relieve nasal blockage in allergic rhinitis patients." @default.
• W2079475051 created "2016-06-24" @default.
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• W2079475051 date "2009-01-01" @default.
• W2079475051 modified "2023-09-23" @default.
• W2079475051 title "Effect of TA-270, a novel quinolinone derivative, on antigen-induced nasal blockage in a guinea pig model of allergic rhinitis" @default.
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• W2079475051 doi "https://doi.org/10.1016/j.ejphar.2008.11.006" @default.
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