中國醫藥大學機構典藏 China Medical University Repository, Taiwan:Item 310903500/29096
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    题名: Endemic Burkholderia cepacia bacteraemia: Clinical features and antimicrobial susceptibilities of isolates
    作者: Yu, WL;Wang, DY;Lin, CW;Tsou, MF
    贡献者: 附設醫院內科部感染科;China Med Coll Hosp, Dept Med, Div Infect Dis, Taichung, Taiwan;China Med Coll Hosp, Div Med Chem, Dept Internal Med, Taichung, Taiwan;China Med Coll Hosp, Dept Clin Lab, Taichung, Taiwan;China Med Coll, Sch Med Technol, Taichung, Taiwan
    日期: 1999
    上传时间: 2010-09-24 14:21:22 (UTC+8)
    出版者: SCANDINAVIAN UNIVERSITY PRESS
    摘要: The interactions and mechanisms between veratrine and paeoniflorin on the isolated rat aorta were studied. Veratrine (1x10(-6) to 1x10(-4)g/ml) could induce contraction on the isolated rat aorta in a concentration-related manner. Paeoniflorin had no effect on the isolated rat aorta. Pretreatment with prazosin (1 x 10(-6) M) and nifedipine (1x10(-6) M) but not yohimbine (1 x 10(-5) M) could decrease the tension of contraction induced by veratrine (Ix 10(-4)g/ml). Sodium nitroprusside (1 x 10(-4) hi) could inhibit the contraction induced by veratrine (1 x 10(-4)g/ mi) with or without endothelium, whereas methylene blue (5 x 10(-5) M) could increase the contraction induced by veratrine (1 x 10(-4) g/ml). Treatment with veratrine (1 x 10(-4)g/ml) could decrease the tension of contraction induced by norepinephrine (1 x 10(-6) M) or phenylephrine (1 x 10(-4) M). The inhibition of veratrine on norepinephrine-induced contraction was potentiated by L-arginine (1 x 10(-4) M) and reversed by L-NAME (1 x 10(-5) M). Paeoniflorin (1x10(-4) M) could decrease the tension of contraction induced by veratrine (1 x 10(-4)g/ml) and methylene blue (5 x 10(-5) M). The inhibition of paeoniflorin on veratrine was more potent on rat isolated aorta with endothelium than without endothelium. Ryanodine (1 x 10(-5) M) and Ca2+-free medium could inhibit methylene blue-induced contraction. From the above results, the relaxation of veratrine on the norepinephrine-induced contraction might be related to the increase of NO and cGMP. The contraction of veratrine on the isolated rat aorta was via the increase of intracellular calcium which was inhibited by paeoniflorin. (C) 1999 Elsevier Science Ireland Ltd. All rights reserved.
    關聯: SCANDINAVIAN JOURNAL OF INFECTIOUS DISEASES 31(3):293-298
    显示于类别:[台中附設醫院] 期刊論文

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