Cerium dioxide nanoparticles increase immunogenicity of the influenza vaccine

Antiviral Research
Nadezhda M ZholobakVladimir K Ivanov

Abstract

We have demonstrated the influence of cerium dioxide nanoparticles on the immunogenicity of the influenza vaccine on an example of liquid split inactivated Vaxigrip vaccine. Antibody titers were analyzed using the hemagglutination inhibition (HI) assay. Seroprotection, seroconversion, the geometric mean titers (GMTs) and the factor increase (FI) in the GMTs were calculated. The effect of nano-ceria surface stabilizer on the enhancement of immunogenicity was shown. The vaccine modified by citrate-stabilized nano-ceria, in contrast to a non-modified Vaxigrip vaccine, did not provide an adequate level of seroprotection, and seroconversion after vaccination was 66.7% on days 49-63 for virus strain А(H1N1) and 100% on day 49 for virus strain B/Yamagata. For the low immunogenic influenza B virus, the rise in antibody titers (GMT/IF) was 24.38/3.28 after the first injection and 50.40/6.79 on day 49. For the vaccine modified by non-stabilized nano-ceria, for all virus strains under study, on day 63, upon immunization notable levels of seroprotection, seroconversion and GMT/IF were registered (higher than for the non-modified Vaxigrip vaccine). The successful attempt to modify the influenza vaccine demonstrates the possible ways of incr...Continue Reading

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Citations

Apr 4, 2021·Polymers·Alexander B ShcherbakovVladimir K Ivanov
Aug 24, 2021·Journal of Controlled Release : Official Journal of the Controlled Release Society·Mohd Aslam SaifiChandraiah Godugu
Sep 24, 2020·Nano Today·Yongjiu ChenSijin Liu

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