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Leukotriene B 4 levels from stimulated neutrophils from healthy and allergic subjects: effect of platelets and exogenous arachidonic acid
Author(s) -
HOSNI R.,
CHABANNES B.,
PACHECO Y.,
MOLIERE P.,
GROSCLAUDE M.,
FAYOLLE M. PERRIN,
LAGARDE M.
Publication year - 1991
Publication title -
european journal of clinical investigation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.164
H-Index - 107
eISSN - 1365-2362
pISSN - 0014-2972
DOI - 10.1111/j.1365-2362.1991.tb01420.x
Subject(s) - arachidonic acid , platelet , leukotriene , leukotriene b4 , immunology , leukotriene c4 , chemistry , lipoxygenase , endocrinology , platelet activation , medicine , biochemistry , asthma , inflammation , enzyme
. Leukotriene B 4 (LTB 4 ) levels were measured in peripheral blood neutrophils from allergic and healthy donors after stimulation by calcium ionophore A 23187. This level was higher in neutrophils from allergic subjects than in neutrophils from healthy subjects in the presence as well as in the absence of exogenous arachidonic acid. Platelets from allergics increased LTB 4 levels from neutrophils from allergics but not levels in those from healthy donors. Moreover, platelets from healthy subjects reduced LTB 4 in neutrophils from both groups. These results suggest that biochemical differences exist in neutrophils and platelets from allergics which contribute to changes in arachidonic acid metabolism via the 5‐lipoxygenase pathway. In addition, they support the concept that platelets may play an important role in the regulation of neutrophil LTB 4 levels, possibly by affecting the 5‐lipoxygenase activity during the course of allergic inflammatory reactions.