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Platelet-activating factor (PAF) induces wheal and flare skin reactions independent of mast cell degranulation.
MedLine Citation:
PMID:  23320562     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
BACKGROUND: Platelet-activating factor (PAF) causes wheal and flare responses which are abrogated by H1-antihistamines giving rise to the hypothesis that PAF-induced wheal development is secondary to histamine release from dermal mast cells. But is this hypothesis correct?
METHODS: Wheal and flare responses were induced by intradermal injection of PAF, codeine and histamine in 14 healthy volunteers. Dermal histamine and PGD2 contractions were measured using microdialysis.
RESULTS: PAF, unlike histamine and codeine, did not cause a statistically significant rise in mean histamine levels with ten persons showing negligible histamine release. Codeine caused a significant but variable histamine release, ranging from 29 to 282 ng/ml. Codeine, but not PAF or histamine, caused a small but statistically significant release of PGD2.
CONCLUSION: Wheal and flare reactions in human skin induced by PAF are not associated with histamine release and, therefore, appear to be independent of mast cell degranulation.
Authors:
K Krause; A Giménez-Arnau; E Martinez-Escala; M Farré-Albadalejo; M Abajian; M K Church; M Maurer
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Allergy     Volume:  68     ISSN:  1398-9995     ISO Abbreviation:  Allergy     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-01-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7804028     Medline TA:  Allergy     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  256-8     Citation Subset:  IM    
Copyright Information:
© 2013 John Wiley & Sons A/S. Published by Blackwell Publishing Ltd.
Affiliation:
Department of Dermatology and Allergy, Allergie-Centrum-Charité, Charité - Universitätsmedizin Berlin, Berlin, Germany.
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