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- W2074366829 abstract "An in vivo model of the rat urinary bladder microcirculation has been developed and microcirculatory responses to agents which produce vasoconstriction, vasodilation, and macromolecular leakage have been characterized. The urinary bladder of anesthetized female Sprague-Dawley rats is exteriorized and positioned in a tissue bath with a single stay suture which does not penetrate the lumen of the bladder. All blood vessels and nerves from the animal remain intact. The tissue bath is filled with Krebs solution which is monitored and maintained at a temperature of 36 +/- 0.5 degrees and a pH of 7.4 +/- 0.5. In vivo television microscopy is used to monitor vascular diameter and flow changes and isothiocyanate-tagged bovine serum albumin fluorescence is used as an index of macromolecular leakage. Norepinephrine (10(-6) M) caused a statistically significant decrease in vascular diameters of both arterioles and venules while sodium nitroprusside (10(-7) M) significantly increased arteriolar and venular diameters, histamine (10(-4) M) caused no change in venular diameters but did induce a significant macromolecular leak from those vessels. Compound 48/80 (1 and 10 micrograms/ml) induced a significant dose-dependent macromolecular leakage from venules. However, only with the 10 micrograms/ml dose was there visually detectable mast cell degranulation. It is concluded that this rat urinary bladder model provides a stable, reproducible model of a smooth muscle microcirculatory bed in a controlled environment, which responds similarly to other microcirculations." @default.
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- W2074366829 date "1989-07-01" @default.
- W2074366829 modified "2023-09-23" @default.
- W2074366829 title "The rat urinary bladder: Vasoactivity and macromolecular leakage in a new model" @default.
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- W2074366829 doi "https://doi.org/10.1016/0026-2862(89)90014-9" @default.
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