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The Journal of Immunology, Vol 137, Issue 10 3284-3289, Copyright © 1986 by American Association of Immunologists
ARTICLES |
DJ Schrier and KM Imre
Adenosine is a potent physiologic substance with a variety of biologic activities. Many of the effects of adenosine appear to be mediated by two populations of cell-surface adenosine receptors (A1 and A2). We have examined the effects of several adenosine receptor agonists on human neutrophils stimulated with the chemotactic peptide N-formyl- methionyl-leucyl-phenylalanine (FMLP). The results indicate that both superoxide anion generation and degranulation (as assessed by lysozyme release) are inhibited. Inhibition correlated most strongly with A2 receptor affinity for both parameters and was reversible by the adenosine receptor antagonist 8-phenyltheophylline. Because toxic oxygen metabolites and degradative enzymes are implicated in a variety of inflammatory disorders, adenosine agonists may be useful probes to help expand our knowledge of the role of these mediators in human disease.
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