title: Effect of platelet-activating factor inhalation on nonspecific bronchial reactivity in man.
abstract: Bronchial hyperactivity is a recognized hallmark of asthma, characterized by an exaggerated bronchial response to numerous mediators, including histamine. It is also well recognized that bronchial hyperresponsiveness is increased following allergen exposure, although no particular mediator has been shown to induce this response. The recent observation that PAF can induce increased nonspecific bronchial reactivity in normal subjects emphasizes its importance as an inflammatory mediator. In this report we sought to further elucidate the role of PAF in airway hyperreactivity by comparing the effect of PAF on methacholine-induced airway responsiveness in six non-asthmatic subjects. Nonspecific airway responsiveness was not significantly increased following PAF inhalation at 6 hours nor was it increased at 1, 2, 7, or 14 days. Further elucidation of the potential role of PAF in explaining changes in airway reactivity is necessary.
authors.affiliation: Allergic Disease Center, Creighton University School of Medicine, Omaha.
authors.forename: R J
authors.initials: RJ
authors.lastname: Hopp
authors.forename: A K
authors.initials: AK
authors.lastname: Bewtra
authors.forename: D K
authors.initials: DK
authors.lastname: Agrawal
authors.forename: R G
authors.initials: RG
authors.lastname: Townley
mesh_terms: D000328:Adult; D001249:Asthma / Q000175:diagnosis / Q000209:etiology*; D001980:Bronchi / Q000503:physiopathology*; D001985:Bronchial Provocation Tests / Q000379:methods; D006801:Humans; D008297:Male; D016210:Methacholine Chloride; D008688:Methacholine Compounds; D008875:Middle Aged; D010972:Platelet Activating Factor / Q000494:pharmacology / Q000502:physiology*; D013997:Time Factors
chemical_list: D008688:Methacholine Compounds; D010972:Platelet Activating Factor; D016210:Methacholine Chloride