Effects of a New Antiallergic Drug, VUF-K-8788, on Infiltration of Lung Parenchyma by Eosinophils in Guinea Pigs and Eosinophil-Adhesion to Human Umbilical Vein Endothelial Cells (HUVEC).

4区 · 医学

Article

作者: TAKIZAWA, Toshiaki ; WATANABE, Chie ; TOHMA, Tsutomu ; SAIKI, Ikuo ; NAGAI, Hiroichi ; WADA, Yasushi

Airway inflammation and reversible airway obstruction are hallmarks of bronchial asthma. In this study, we investigated the effects of a new antiallergic drug, 7-[3-[4-(2-quinolinylmethyl)-1-piperazinyl]-propoxy]-2,3-dihydro-4H-1,4-benzothiazin-3-one (VUF-K-8788), on histopathological changes in lung parenchyma of guinea pigs during late-phase asthmatic reaction (LAR), and on eosinophil-adhesion to human umbilical vein endothelial cells (HUVEC). Repeated exposure to ovalbumin of sensitized guinea pigs induced inflammatory phenomena such as hyperplasia of airway epithelial cells, perivascular edema and infiltration of lung parenchyma by eosinophils. VUF-K-8788 inhibited these histopathological phenomena at 10 mg/kg p.o. Moreover, the eosinophil-adherence to HUVEC was inhibited by VUF-K-8788 at the concentration of 10-30 microM. In conclusion, this inhibitory effect of VUF-K-8788 on eosinophil-adherence might contribute to the prevention of LAR and infiltration by eosinophils in the experimental asthmatic model in guinea pigs.

2001-01-01·Japanese Journal of Pharmacology

VUF-K-8788, a Periphery-Selective Histamine Hi Antagonist With Anti-pruritic Activities

Article

作者: Wada, Yasushi ; Inagaki, Naoki ; Tohma, Tsutomu ; Timmerman, Henk ; Takizawa, Toshiaki ; Nagai, Hiroichi ; Matsumoto, Jiro ; Nagao, Masafumi ; Kanke, Toru ; Zhang, Min-Qiang

The pharmacological properties of 7-[3-[4-(2-quinolinylmethyl)-1-piperazinyl]-propoxy]-2,3-dihydro-4H-1,4-benzothiazin-3-one (VUF-K-8788) were investigated in vitro and in vivo. VUF-K-8788 inhibited [3H]-mepyramine from binding to the cell membrane of lung parenchyma (Ki value: 5.0 nM) and the histamine-induced contraction of isolated guinea pig ileum (pA2: 9.71) without affecting ileal contractions induced by acetylcholine, serotonin, KCl and BaCl2. The increase of vascular permeabilities induced by histamine and passive cutaneous anaphylaxis (PCA) in guinea pigs were inhibited by VUF-K-8788 in a dose-dependent fashion (ED50: 0.24 and 0.26 mg/kg, p.o., respectively). Moreover, the anti-histaminic effect of VUF-K-8788 was also observed in rats. In experiments on the effects on the central nervous system, VUF-K-8788 at 1 mg/kg, p.o. hardly antagonized the H1 receptor at all in the cerebral cortex of guinea pigs. VUF-K-8788 inhibited the PCA-induced scratching behavior completely without affecting thiopental-induced sleep in mice. These results suggested that VUF-K-8788 would be useful in the treatment of allergic disorders such as atopic dermatitis and eczema.

1999-01-01·Pharmacology4区 · 医学

Effects of a New Antiallergic Agent, VUF-K-8788, on Experimental Asthmatic Reactions in Guinea Pigs

4区 · 医学

Article

作者: Wada, Yasushi ; Nagai, Hiroichi ; Tanaka, Hiroyuki ; Yamada, Takatoshi ; Takahashi, Yoshimasa ; Takizawa, Toshiaki

The effects of 7-[3-[4-(2-quinolinylmethyl)- 1-piperazinyl]propoxy]-2,3-dihydro-4<i>H</i>-1,4- benzothiazin-3-one (VUF-K-8788) on experimental asthmatic reactions in guinea pigs were investigated. VUF-K-8788 inhibited histamine-induced bronchoconstriction at the doses of 0.3 and 1 mg/kg per os (p.o.). VUF-K-8788 inhibited anaphylactic bronchoconstriction at doses between 0.01 and 1 mg/kg in passively sensitized guinea pigs. Terfenadine used as a reference drug also inhibited an antigen-induced bronchoconstriction. VUF-K-8788 at the doses of 0.3 and 1 mg/kg inhibited immediate- and late-phase asthmathic reactions in actively sensitized guinea pigs. Terfenadine inhibited only the immediate phase reaction. Moreover, VUF-K-8788 inhibited the infiltration of eosinophils and macrophages into bronchoalveolar lavage fluid in guinea pigs. These results indicate that VUF-K-8788 may be useful for the treatment of bronchial asthma.

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