Abstract:
:Neutralizing antibody is associated with the prevention and clearance of influenza virus infection. Microneutralization (MN) and hemagglutination inhibition (HI) assays are currently used to evaluate neutralizing antibody responses against human and avian influenza viruses, including H5N1. The MN assay is somewhat labor intensive, while HI is a surrogate for neutralization. Moreover, use of replication competent viruses in these assays requires biosafety level 3 (BSL-3) containment. Therefore, a neutralization assay that does not require BSL-3 facilities would be advantageous. Toward this goal, we generated a panel of pseudotypes expressing influenza hemagglutinin (HA) and neuraminidase (NA) and developed a pseudotype-based neutralization (PN) assay. Here we demonstrate that HA/NA pseudotypes mimic release and entry of influenza virus and that the PN assay exhibits good specificity and reveals quantitative difference in neutralizing antibody titers against different H5N1 clades and subclades. Using immune ferret sera, we demonstrated excellent correlation between the PN, MN, and HI assays. Thus, we conclude that the PN assay is a sensitive and quantifiable method to measure neutralizing antibodies against diverse clades and subclades of H5N1 influenza virus.
journal_name
Vaccinejournal_title
Vaccineauthors
Tsai C,Caillet C,Hu H,Zhou F,Ding H,Zhang G,Zhou B,Wang S,Lu S,Buchy P,Deubel V,Vogel FR,Zhou Pdoi
10.1016/j.vaccine.2009.08.056subject
Has Abstractpub_date
2009-11-12 00:00:00pages
6777-90issue
48eissn
0264-410Xissn
1873-2518pii
S0264-410X(09)01239-0journal_volume
27pub_type
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