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Evidence for Antibody-Catalyzed Ozone Formation in Bacterial Killing and Inflammation
Paul Wentworth Jr.,1Jonathan E. McDunn,1Anita D. Wentworth,1Cindy Takeuchi,2Jorge Nieva,3Teresa Jones,1Cristina Bautista,1Julie M. Ruedi,3Abel Gutierrez,3Kim D. Janda,1Bernard M. Babior,3Albert Eschenmoser,14Richard A. Lerner1
Recently, we showed that antibodies catalyze the generation of
hydrogen peroxide (H2O2) from singlet
molecular oxygen (1O2*) and water. Here, we
show that this process can lead to efficientkilling of bacteria,
regardless of the antigen specificity ofthe antibody.
H2O2 production by antibodies alone was found
tobe not sufficient for bacterial killing. Our studies suggestedthat
the antibody-catalyzed water-oxidation pathway produced anadditional
molecular species with a chemical signature similarto that of ozone.
This species is also generated during the oxidativeburst of activated
human neutrophils and during inflammation.These observations suggest
that alternative pathways may existfor biological killing of bacteria
that are mediated by potentoxidants previously unknown to biology.
1 Department of Chemistry,
2 Department of Immunology,
3 Department of Molecular and Experimental
Medicine and The Skaggs Institute for Chemical Biology, The
Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA
92037, USA.
4 Laboratorium für organische
Chemie, Eidgenössichsche Technische Hochschule (ETH)
Hönggerberg HCl-H309, Universitaetstrasse 16 CH-8093
Zürich, Switzerland.
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