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Science. 2011 Aug 12;333(6044):850-6. doi: 10.1126/science.1205669. Epub 2011 Jul 28.

A neutralizing antibody selected from plasma cells that binds to group 1 and group 2 influenza A hemagglutinins.

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1
Institute for Research in Biomedicine, 6500 Bellinzona, Switzerland.

Abstract

The isolation of broadly neutralizing antibodies against influenza A viruses has been a long-sought goal for therapeutic approaches and vaccine design. Using a single-cell culture method for screening large numbers of human plasma cells, we isolated a neutralizing monoclonal antibody that recognized the hemagglutinin (HA) glycoprotein of all 16 subtypes and neutralized both group 1 and group 2 influenza A viruses. Passive transfer of this antibody conferred protection to mice and ferrets. Complexes with HAs from the group 1 H1 and the group 2 H3 subtypes analyzed by x-ray crystallography showed that the antibody bound to a conserved epitope in the F subdomain. This antibody may be used for passive protection and to inform vaccine design because of its broad specificity and neutralization potency.

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PMID:
21798894
DOI:
10.1126/science.1205669
[Indexed for MEDLINE]
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