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- W1978868908 abstract "Our previous research has showed that rhizome of Atractylodes japonica Koidz (Compositae) exhibits an increase in the spontaneous contractility of distal colon in rats. The aims of this study are to identify the phytochemical(s), which stimulate(s) the colonic contractility, contained in Atractylodes japonica and to evaluate the pharmacological mechanism responsible for the colonic muscle contraction. Based on the stimulatory activity-guided fractionation on the isometric contraction of rat distal colonic strips, atractylodiol (ATD) and diacetyl-atractylodiol (DATD) were isolated from the CHCl3 fractions of Atractylodes japonica. ATD and DATD dose-dependently increased both tension and amplitude of distal colon longitudinal muscle (DCLM), but they stimulated only amplitude in the distal colon circular muscle. The ED50 values of ATD and DATD to stimulate the amplitude of DCLM were revealed as 9.1 × 10−9 M and 1.8 × 10−8 M, respectively. l-NAME (0.1 mM) significantly increased the ADT (1 μM)-induced contraction of DCLM, whereas SNAP (0.1 mM) markedly reduced the stimulatory effects of ATD on DCLM contractility. The combined effects of SNAP and atropine (0.5 μM) on the ATD-induced contraction of DCLM were similar to the inhibitory effects of SNAP alone. Suramin (0.1 mM) significantly enhanced the increase of ATD-induced DCLM contraction, whereas ADPβS (0.1 mM) markedly abolished the stimulatory effects of ATD on the spontaneous contractility of DCLM. The present results demonstrate that acetylene compounds, ATD and DATD, are the effective phytochemical of Atractylodes japonica to stimulate the motility of distal colon in rats, and ATD possibly enhances the spontaneous contractility of distal colon through inhibiting the mechanism of nitrergic–purinergic relaxation." @default.
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- W1978868908 date "2011-03-01" @default.
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- W1978868908 title "Acetylene compound isolated from Atractylodes japonica stimulates the contractility of rat distal colon via inhibiting the nitrergic–purinergic relaxation" @default.
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- W1978868908 doi "https://doi.org/10.1016/j.jep.2010.11.059" @default.
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