Mucosal and systemic immune responses induced by recombinant Lactobacillus spp. expressing the hemagglutinin of the avian influenza virus H5N1

Clin Vaccine Immunol. 2012 Feb;19(2):174-9. doi: 10.1128/CVI.05618-11. Epub 2011 Nov 30.

Abstract

To develop a safe, effective, and convenient vaccine for the prevention of highly pathogenic avian influenza (HPAI), we have successfully constructed two recombinant lactobacillus strains (LA4356-pH and DLD17-pH) that express the foreign HPAI virus protein hemagglutinin 1 (HA(1)). The mucosal and systemic immune responses triggered by these two recombinant lactobacilli following oral administration to BALB/c mice were evaluated. The results showed that both LA4356-pH and DLD17-pH could significantly increase the specific anti-HA(1) IgA antibody level in the mucosa and the anti-HA(1) IgG level in serum, as well as stimulating the splenic lymphocyte proliferative reaction through increased expression of interleukin-4 (IL-4). Compared with LA4356-pH, DLD17-pH was more effective at inducing systemic and mucosal immune responses, with higher anti-HA(1)-specific IgA and IgG levels. Therefore, DLD17-pH could be a promising oral vaccine candidate against HPAI.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antibodies, Viral / blood
  • Antibodies, Viral / immunology
  • Hemagglutinin Glycoproteins, Influenza Virus / immunology*
  • Immunity, Mucosal / immunology
  • Immunoglobulin A / immunology
  • Immunoglobulin G / blood
  • Immunoglobulin G / immunology
  • Influenza A Virus, H5N1 Subtype / immunology*
  • Influenza Vaccines / immunology*
  • Interleukin-4 / immunology
  • Lactobacillus / genetics
  • Lactobacillus / immunology*
  • Lymphocyte Activation
  • Mice
  • Mice, Inbred BALB C
  • Orthomyxoviridae Infections / immunology*
  • Orthomyxoviridae Infections / prevention & control*

Substances

  • Antibodies, Viral
  • Hemagglutinin Glycoproteins, Influenza Virus
  • Immunoglobulin A
  • Immunoglobulin G
  • Influenza Vaccines
  • Interleukin-4