2. Academic Validation
  3. Dendritic cell-targeted recombinantLactobacilli induce DC activation and elicit specific immune responses against G57 genotype of avian H9N2 influenza virus infection

Dendritic cell-targeted recombinantLactobacilli induce DC activation and elicit specific immune responses against G57 genotype of avian H9N2 influenza virus infection

  • Vet Microbiol. 2018 Sep;223:9-20. doi: 10.1016/j.vetmic.2018.07.009.
Yixue Sun 1,  Jing Qian 2,  Xiaohong Xu 2,  Yubo Tang 2,  Wenzhang Xu 2,  Wentao Yang 1,  Yanlong Jiang 1,  Guilian Yang 1,  Zhuang Ding 3,  Yanlong Cong 4,  Chunfeng Wang 5
Affiliations

Affiliations

  • 1 Engineering Research Center of Jilin Province for Animals Probiotics, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China.
  • 2 Laboratory of Infectious Diseases, College of Veterinary Medicine, Jilin University, Changchun, China; Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, China.
  • 3 Laboratory of Infectious Diseases, College of Veterinary Medicine, Jilin University, Changchun, China; Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, China. Electronic address: dingzhuang@jlu.edu.cn.
  • 4 Laboratory of Infectious Diseases, College of Veterinary Medicine, Jilin University, Changchun, China; Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, China. Electronic address: congyanlong@126.com.
  • 5 Engineering Research Center of Jilin Province for Animals Probiotics, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China. Electronic address: wangchunfeng@jlau.edu.cn.
PMID: 30173758 DOI: 10.1016/j.vetmic.2018.07.009
Abstract

H9N2 avian influenza viruses are of significance in poultry and public health for the past two decades. Vaccination plays an important role in preventing the Infection in domestic poultry. Current H9N2 vaccines have not yet offered ideal protection and eliminated shedding of G57 genotype viruses responsible for H9N2 outbreaks during 2010-2013. Targeted vaccination is a promising strategy to improve vaccine effectiveness. Such a vaccine strategy can be achieved if it is targeted to dendritic cells (DCs) that directly elicit mucosal and adaptive immune responses against microbe challenge. For this purpose, we develop a DC-targeted mucosal vaccine for the oral delivery of the HA protein fused to a DCpep by using Lactobacillus plantarum as an antigen delivery system against G57 virus Infection. It showed that Lactobacillus plantarum expressing HA-DCpep confers efficient protection against G57 H9N2 Infection, due to have the potential to activate DCs by the TLR-induced NF-κB pathway, to promote DC migration by the CCR7-CCL19/CCL21 axis, thereby enhancing the presentation of immunogen to T and B lymphocytes, resulting in skewing T cells polarization towards Th1, Th2 and Treg cells and evoking more efficient mucosal and adaptive immunity responses. The presented oral mucosal vaccine strategy illustrates the feasibility and efficacy of antigen targeting to DCs through genetic fusion of vaccines to DC-targeting Peptides and aids in the design and selection of indications that could be used with this oral vaccine platform against influenza.

Keywords

Adaptive immunity; DC-targeted vaccine; DCpep; Influenza; Mucosal immunity.

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