作者: E. Schwertfeger , J. Wehrens , V. Oberhauser , A. Katzenwadel , L. C. Rump
DOI: 10.1046/J.1365-2680.2001.00228.X
关键词:
摘要: 1. We tested the vasoactive properties of immunosuppressive drug FK 506 (tacrolimus) in preconstricted rat and human isolated renal arteries vitro. 2. In arteries, tacrolimus (3, 10 microM) showed a direct dose-dependent contractile effect by maximally 23 microm (10% noradrenaline effect), which was only observed presence intact endothelium. Moreover, lower concentration (1 potentiated pressor responses to sympathetic neurotransmitter but not ATP this species. ATP- (0.01-10 induced vasodilation affected microM). 3. contrast, interlobar failed induce vasoconstriction did significantly potentiate constrictor noradrenaline. Acetylcholine-(1 much smaller than suggesting lack functional endothelium preparation. 4. The findings suggest that releases an endothelium-derived constricting factor increase vascular tone is probably because absence or necessary mediator mechanism.