Adeno-associated virus-vectored influenza vaccine elicits neutralizing and Fcγ receptor-activating antibodies.

Abstract:

:The current seasonal inactivated influenza vaccine protects only against a narrow range of virus strains as it triggers a dominant antibody response toward the hypervariable hemagglutinin (HA) head region. The discovery of rare broadly protective antibodies against conserved regions in influenza virus proteins has propelled research on distinct antigens and delivery methods to efficiently induce broad immunity toward drifted or shifted virus strains. Here, we report that adeno-associated virus (AAV) vectors expressing influenza virus HA or chimeric HA protected mice against homologous and heterologous virus challenges. Unexpectedly, immunization even with wild-type HA induced antibodies recognizing the HA-stalk and activating FcγR-dependent responses indicating that AAV-vectored expression balances HA head- and HA stalk-specific humoral responses. Immunization with AAV-HA partially protected also ferrets against a harsh virus challenge. Results from this study provide a rationale for further clinical development of AAV vectors as influenza vaccine platform, which could benefit from their approved use in human gene therapy.

journal_name

EMBO Mol Med

journal_title

EMBO molecular medicine

authors

Demminger DE,Walz L,Dietert K,Hoffmann H,Planz O,Gruber AD,von Messling V,Wolff T

doi

10.15252/emmm.201910938

subject

Has Abstract

pub_date

2020-05-08 00:00:00

pages

e10938

issue

5

eissn

1757-4676

issn

1757-4684

journal_volume

12

pub_type

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