Fooyin University Institutional Repository:Item 987654321/9575
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    题名: Thymol-evoked Ca+ mobilization and ion currents in pituitary GH3 cells.
    作者: Shen, A.Y.;Huang, M.H.;Wang, T.S.;Wu, H.M.;Kang, Y.F.;Chen, C.L.
    贡献者: 輔英科技大學 物理治療系
    日期: 2009-06-01
    上传时间: 2010-11-10 13:32:10 (UTC+8)
    摘要: In this study, an attempt was made to elucidate the effects of thymol, a monocyclic phenolic compound, on Ca2+ mobilization and ion currents in pituitary GH3 cells with the aid of fura-2 fluorimetry and the whole-cell voltage-clamp technique. Thymol increased intracellular Ca2+ concentrations ([Ca2+]i) in GH3 cells loaded with Ca2+-sensitive dye fura-2. Removing extracellular Ca2+ reduced the thymol-induced [Ca2+]i rise. In Ca2+ -free solution, thymol-evoked [Ca2+]i rise was unchanged by depleting the Ca2+ store with thapsigargin (1 microM), while the thapsigargin-induced [Ca2+]i rise was reduced by pretreatment with thymol. These results imply that the Ca2+ stores depleted by thymol comprise thapsigargin-sensitive and thapsigargin-insensitive pools. In addition, after depletion of the internal Ca2+ store with 100 microM thymol in Ca2+ -free solution, a subsequent application of Ca2+ greatly induced a [Ca2+]i increase. The results indicate that, similar to thapsigargin, 100 microM thymol may activate the capacitative calcium entry (CCE) channel. However, thymol (100 microM) had a slight depressant action in L-type calcium current (I(CaL)). The stimulatory actions of thymol on Ca2+ signaling may partly be responsible for the underlying cellular mechanisms through which it affects neuroendocrine functions.
    關聯: Natural Product Communications 4(6),749-752
    显示于类别:[物理治療系] 期刊論文

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