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Hemin, a heme oxygenase substrate analog, inhibits the cell surface expression of CD11b and CD66b on human neutrophils by J. A. Andersson; A. Egesten; L. O. Cardell is a Medicine article available to read on EtoBox.

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## Background: Neutrophils are signaled to sites of infection and inflammation by different chemotactic stimuli. in order to reach the airways they have to adhere to, and then migrate through, the endothelium of pulmonary vessels. carbon monoxide (co) is a gaseous mediator, endogenously produced in the human airways. increased co production has been demonstrated during airway inflammation and co as well as hemin, a substrate for co producing enzymes, has been shown to affect neutrophil migration. our objective was to investigate if the neutrophil cell surface expression of cd11b, cd66b and cd63 was changed during intermittent allergic rhinitis and to establish whether co could affect the expression of these markers of cellular activation. ## Methods: Blood from 10 healthy volunteers was drawn and incubated with different concentrations of hemin. blood from 12 other healthy volunteers and from 12 patients with intermittent allergic rhinitis was also drawn during grass pollen season. neutrophils were then isolated from all these three sets, and their expression of cd antigens measured using flow cytometry. ## Results: Patients with symptomatic intermittent allergic rhinitis exhibited

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Author

J. A. Andersson; A. Egesten; L. O. Cardell

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0105-4538)

Published

2002

Language

EN

Field

Medicine (Health Sciences)