Sequential Seasonal H1N1 Influenza Virus Infections Protect Ferrets against Novel 2009 H1N1 Influenza Virus

被引:54
作者
Carter, Donald M. [1 ]
Bloom, Chalise E. [1 ]
Nascimento, Eduardo J. M. [1 ]
Marques, Ernesto T. A. [1 ,2 ,3 ]
Craigo, Jodi K. [1 ,2 ]
Cherry, Joshua L. [4 ]
Lipman, David J. [4 ]
Ross, Ted M. [1 ,2 ,3 ]
机构
[1] Univ Pittsburgh, Ctr Vaccine Res, Pittsburgh, PA 15260 USA
[2] Univ Pittsburgh, Dept Microbiol & Mol Genet, Pittsburgh, PA USA
[3] Univ Pittsburgh, Dept Infect Dis & Microbiol, Pittsburgh, PA USA
[4] NIH, Natl Ctr Biotechnol Informat, Natl Lib Med, Bethesda, MD 20892 USA
基金
美国国家卫生研究院;
关键词
MONOCLONAL-ANTIBODIES; ADAMANTANE RESISTANCE; REACTIVE ANTIBODIES; IMMUNE-RESPONSES; PLAQUE ASSAY; B VIRUSES; HEMAGGLUTININ; CHALLENGE; VACCINE; BINDING;
D O I
10.1128/JVI.02257-12
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Individuals <60 years of age had the lowest incidence of infection, with similar to 25% of these people having preexisting, cross-reactive antibodies to novel 2009 H1N1 influenza. Many people >60 years old also had preexisting antibodies to novel H1N1. These observations are puzzling because the seasonal H1N1 viruses circulating during the last 60 years were not antigenically similar to novel H1N1. We therefore hypothesized that a sequence of exposures to antigenically different seasonal H1N1 viruses can elicit an antibody response that protects against novel 2009 H1N1. Ferrets were preinfected with seasonal H1N1 viruses and assessed for cross-reactive antibodies to novel H1N1. Serum from infected ferrets was assayed for cross-reactivity to both seasonal and novel 2009 H1N1 strains. These results were compared to those of ferrets that were sequentially infected with H1N1 viruses isolated prior to 1957 or more-recently isolated viruses. Following seroconversion, ferrets were challenged with novel H1N1 influenza virus and assessed for viral titers in the nasal wash, morbidity, and mortality. There was no hemagglutination inhibition (HAI) cross-reactivity in ferrets infected with any single seasonal H1N1 influenza viruses, with limited protection to challenge. However, sequential H1N1 influenza infections reduced the incidence of disease and elicited cross-reactive antibodies to novel H1N1 isolates. The amount and duration of virus shedding and the frequency of transmission following novel H1N1 challenge were reduced. Exposure to multiple seasonal H1N1 influenza viruses, and not to any single H1N1 influenza virus, elicits a breadth of antibodies that neutralize novel H1N1 even though the host was never exposed to the novel H1N1 influenza viruses.
引用
收藏
页码:1400 / 1410
页数:11
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