Abstract
The phospholipid PAF-acether is released from a range of inflammatory cell types and, in experimental animals, has properties appropriate to a mediator of inflammation. We have studied the inflammatory characteristics of intradermally injected PAF-acether in human skin. An early weal and flare response was succeeded, in a proportion of subjects, by an area of late-onset erythema at the site of the resolved weal, reminiscent of the dual response to allergen in sensitized individuals. The time-course and dose-response relationship of the early response has been determined and a synergistic interaction between PAF-acether and prostaglandin E2 established. PAF-acether should therefore be considered as a potential mediator of both acute and persisting inflammation in man.
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