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- W2045478598 abstract "Zeneca ZD6169, (S)-N-(4-benzoylphenyl)-3,3,3-trifluoro- 2-hydroxy-2-methylpropionamide, is a novel compound which relaxes urinary bladder smooth muscle in vitro. The effect of ZD6169 and two of its analogs on 86Rb efflux and 3H-P1075 binding in guinea pig bladder strips was investigated to characterize the K-channel opening properties of this compound. ZD6169 concentration dependently increased the rate of 86Rb efflux from guinea pig bladder strips. 86Rb efflux evoked by ZD6169 and its analogs was blocked by glibenclamide (30 muM) but not by charybdotoxin, apamin or alpha-dendrotoxin, suggesting that this compound activates KATP channels in guinea pig bladder. In addition, interaction of ZD6169 with KATP channels was also confirmed in human bladder smooth muscle cells. Specific binding of 3H-P1075, a potent opener of KATP channels, to guinea pig urinary bladder strips was observed. 3H-P1075 binding was inhibited by known KATP openers. ZD6169 inhibited binding of 3H-P1075 to urinary bladder strips like other structurally different KATP openers, e.g. cromakalim and pinacidil. Potencies for inhibition of 3H-P1075 binding by ZD6169 and other potassium channel openers correlate well with potencies for increase in 86Rb efflux and bladder muscle relaxation studies. It is concluded that Zeneca ZD6169 is a potassium channel opener which activates ATP-sensitive K-channels in guinea pig urinary bladder strips as well as in human bladder cells. Furthermore, binding studies suggest that the effects of ZD6169 and its analogs are mediated by binding to the site labeled by 3H-P1075 in guinea pig bladder strips." @default.
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- W2045478598 title "K-Channel Opening Activity of ZD6169 and Its Analogs: Effect on <sup>86</sup>Rb Efflux and <sup>3</sup>H-P1075 Binding in Bladder Smooth Muscle" @default.
- W2045478598 doi "https://doi.org/10.1159/000139308" @default.
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