Nicardipine reverses vasoactivity associated with University of Wisconsin solution in the rat peripheral circulation.

Abstract:

BACKGROUND:The rapid uniform delivery of University of Wisconsin solution (UW) to the microcirculation may be compromised by its vasoactivity. METHODS:In 2 different rodent models, we tested whether UW-mediated vasoconstriction could be reversed with nicardipine. RESULTS:In the perfused, splanchnic circulation, intravascular control solutions (lactated Ringers [LR], Hextend [HEX], histidine-tryptophan-ketoglutarate [HTK]) or UW (± nicardipine) evoked pressure changes in 3 protocols (series 1; n = 35). In the cremaster muscle, topical control solutions or UW (± nicardipine) evoked vascular responses measured by video microscopy in 4 protocols (series 2; n = 47). In series 1A, 37°C UW increased perfusion pressure, but there was no change caused by LR, HEX, or HTK. In series 1B, 4°C UW caused a similar, albeit transient, increase. In series 1C, nicardipine reversed 37°C UW-mediated vasoconstriction in a dose-related manner. In series 2A, UW caused a 30%-59% constriction that varied with arteriolar branching order. In series 2B, the recovery from UW-induced vasoconstriction varied with duration of exposure, but nicardipine fully reversed residual vasoconstriction. In series 2C, cold and warm UW were equipotent, near maximal, vasoconstrictors. In series 2D, UW potentiated no-reflow. CONCLUSION:UW causes a potent temperature-independent vasoconstriction by a calcium-mediated mechanism and this effect can be mitigated with nicardipine.

journal_name

Transplant Proc

authors

Raveh Y,Lubarsky DA,Pretto EA Jr,Proctor KG

doi

10.1016/j.transproceed.2011.05.053

subject

Has Abstract

pub_date

2011-09-01 00:00:00

pages

2540-9

issue

7

eissn

0041-1345

issn

1873-2623

pii

S0041-1345(11)00870-0

journal_volume

43

pub_type

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