Abstract
Summary
PLV-2, a synthetic analogue of vasopressin, applied topically to the micro-vessels in the rat mesoappendix produces a graded dose response reduction in true capillary blood flow. The various vessel types contract from the venular to the arteriolar loops; the opposite of their normal profile of reactivity. This polypeptide, when injected i.v. in a single dose potentiates constrictor responses to topically applied catecholamines. In contrast to these microcirculatory effects, PLV-2 inhibits norepinephrine-induced contractions in the isolated rabbit aortic strip.
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