VASOACTIVE PROPERTIES OF ACETYL GLYCERYL ETHER PHOSPHORYLCHOLINE AND ANALOGS

Abstract

Intradermal injection of 0.1 pmol (52 pg) of acetyl glyceryl ether phosphorylcholine (AGEPC) in guinea pigs induced increased vascular permeability as assessed by a skin-blueing model. Rabbits and rats showed increased vascular permeability with 1.0 pmol (520 pg) of AGEPC. On a molar basis, 1000-10,000 times more histamine was required to induce skin blueing in the same animals. In rabbits and guinea pigs, the increased vascular permeability induced by AGEPC occurred as an early, transient phase and as a delayed, prolonged phases. The early, transient phase was not inhibited by chlorpheniramine doses which markedly reduced or abrogated histamine-induced blueing. AGEPC was 100-1000 times more potent than histamine on a molar basis for the induction of vasoconstriction in a blued skin assay in guinea pigs. AGEPC apparently has potent vasoactive properties and is implicated as a mediator of the acute inflammatory process.