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- W2046573438 abstract "Current knowledge about vascular function stems mainly from pharmacological in vitro studies using mounted vascular strips on a strain gauge. We know of no paper that has systematically examined the possibility of assessing the conventional dose-response effects of iontophoresis and laser Doppler investigation of vasoactive substances and compared those relations to data obtained from strips mounted on a strain gauge. We used the vasoactive substances acetylcholine (endothelium dependent) and sodium nitroprusside (endothelium independent) and an antagonist (atropine) to enable further investigations in the receptor physiology of iontophoresis. Dose-response curves from the iontophoresis experiments showed close similarity to those obtained by vascular strips mounted on a strain gauge. The coefficient of variation (CV) of the dose-response factors found in iontophoresis (both inter and intra experimental variability) was low. The iontophoretic effective dose of 50% (ED50) for acetylcholine and nitroprusside had only CVs of 25% and 26%, respectively, compared with 71% and 77% for the vascular strips. Acetylcholine-induced response was antagonized by iontophoresis of atropine. Contrary to expectations, this antagonism was not competitive. The results show that iontophoresis in combination with laser Doppler technology produces reproducible and reliable dose-response curves that picture the vascular effects of vasoactive drugs." @default.
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- W2046573438 date "2007-03-01" @default.
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- W2046573438 title "Assessment of microvascular function by study of the dose–response effects of iontophoretically applied drugs (acetylcholine and sodium nitroprusside)—Methods and comparison with in vitro studies" @default.
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- W2046573438 doi "https://doi.org/10.1016/j.mvr.2006.10.004" @default.
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