Volume 72, Issue 3 pp. 197-207
Research Article

An H1-H3 chimeric influenza virosome confers complete protection against lethal challenge with PR8 (H1N1) and X47 (H3N2) viruses in mice

Asghar Abdoli

Asghar Abdoli

Department of Virology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran

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Hoorieh Soleimanjahi

Corresponding Author

Hoorieh Soleimanjahi

Department of Virology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran

Correspondence

Hoorieh Soleimanjahi, Virology Department, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.

Tel.: +(98) 21 82883561

fax: +(98) 21 82883581

e-mail: [email protected]

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Masoumeh Tavassoti Kheiri

Masoumeh Tavassoti Kheiri

Influenza Research Lab, Pasteur Institute of Iran, Tehran, Iran

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Abbas Jamali

Abbas Jamali

Influenza Research Lab, Pasteur Institute of Iran, Tehran, Iran

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Vahideh Mazaheri

Vahideh Mazaheri

Influenza Research Lab, Pasteur Institute of Iran, Tehran, Iran

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Meghdad Abdollahpour Alitappeh

Meghdad Abdollahpour Alitappeh

Department of Immunology, Pasteur Institute of Iran, Tehran, Iran

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First published: 28 July 2014
Citations: 1
This article reports some interesting results obtained immunizing mice against influenza using chimeric virosomes, furthering the advancement of virosome technology. Virosomes could become attractive system to vaccinate using multiple epitopes, providing broad protection against pathogens that have multiple serotypes or are highly mutagenic.

Abstract

Annual health threats and economic damages caused by influenza virus are still a main concern of the World Health Organization and other health departments all over the world. An influenza virosome is a highly efficient immunomodulating carrier mimicking the natural antigen presentation pathway and has shown an excellent tolerability profile due to its biocompatibility and purity. The major purpose of this study was to construct a new chimeric virosome influenza vaccine containing hemagglutinin (HA) and neuraminidase (NA) proteins derived from the A/PR/8/1934 (H1N1) (PR8) and A/X/47 (H3N2) (X47) viruses, and to evaluate its efficacy as a vaccine candidate in mice. A single intramuscular vaccination with the chimeric virosomes provided complete protection against lethal challenge with the PR8 and X47 viruses. The chimeric virosomes induced high IgG antibody responses as well as hemagglutination inhibition (HAI) titers. HAI titers following the chimeric virosome vaccination were at the same level as the whole inactivated influenza vaccine. Mice immunized with the chimeric virosomes displayed considerably less weight loss and exhibited significantly reduced viral load in their lungs compared with the controls. The chimeric virosomes can be used as an innovative vaccine formulation to confer protection against a broad range of influenza viruses.

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