Preserved antiviral adaptive immunity following polyclonal antibody immunotherapy for severe murine influenza infection.

Abstract:

:Passive immunotherapy may have particular benefits for the treatment of severe influenza infection in at-risk populations, however little is known of the impact of passive immunotherapy on the formation of memory responses to the virus. Ideally, passive immunotherapy should attenuate the severity of infection while still allowing the formation of adaptive responses to confer protection from future exposure. In this study, we sought to determine if administration of influenza-specific ovine polyclonal antibodies could inhibit adaptive immune responses in a murine model of lethal influenza infection. Ovine polyclonal antibodies generated against recombinant PR8 (H1N1) hemagglutinin exhibited potent prophylactic capacity and reduced lethality in an established influenza infection, particularly when administered intranasally. Surviving mice were also protected against reinfection and generated normal antibody and cytotoxic T lymphocyte responses to the virus. The longevity of ovine polyclonal antibodies was explored with a half-life of over two weeks following a single antibody administration. These findings support the development of an ovine passive polyclonal antibody therapy for treatment of severe influenza infection which does not affect the formation of subsequent acquired immunity to the virus.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Stevens NE,Hatjopolous A,Fraser CK,Alsharifi M,Diener KR,Hayball JD

doi

10.1038/srep29154

subject

Has Abstract

pub_date

2016-07-06 00:00:00

pages

29154

issn

2045-2322

pii

srep29154

journal_volume

6

pub_type

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