Enhanced immune response by amphotericin B following NS1 protein prime-oral recombinant Salmonella vaccine boost vaccination protects mice from dengue virus challenge

Wen Tssann Liu, Wei Ting Lin, Chung Chin Tsai, Chuan Chang Chuang, Chin Len Liao, Huang Chi Lin, Yao Wen Hung, Shih Shiung Huang, Chung Chih Liang, Hui Ling Hsu, Hsian-Jenn Wang, Yu Tien Liu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A recombinant vaccine strain SL3261/pLT105 of attenuated aroA Salmonella enterica serovar Typhimurium SL3261 strain expressing a secreted dengue virus type 2 non-structural NS1 and Yersinia pestis F1 (Caf1) fusion protein, rNS1:Caf1, was generated. Immunological evaluation was performed by prime-boost vaccine regimen. Oral immunization of mice with 1 × 109 cfu of SL3261/pLT105 only induced low levels of NS1-specific antibody response and protective immunity following dengue virus challenge. The parenteral NS1 protein priming-oral Salmonella boosting protocol enhanced both NS1-specific serum IgG response and protective efficacy as compared to mice immunized with each type vaccine alone. Addition of an antifungal antibiotic amphotericin B (AmB) to Salmonella vaccine further enhanced the synergic effects of prime-boost vaccine regimen on the elicited NS1-specific serum IgG response and the protective efficacy. Together, the results demonstrated that the rNS1:Caf1 producing Salmonella SL3261/pLT105 strain fails to provide effective protection as an oral vaccine alone despite co-administration of AmB as an adjuvant capable of enhancing the immune responses, and moreover, the protein priming-oral Salmonella vaccine boosting approach in combination with AmB as an immunization regimen may have the potential to be further explored as an alternative approach for dengue vaccine development.

Original languageEnglish
Pages (from-to)5852-5861
Number of pages10
JournalVaccine
Volume24
Issue number31-32
DOIs
Publication statusPublished - Jul 26 2006
Externally publishedYes

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Keywords

  • Amphotericin B
  • Dengue virus
  • NS1
  • Prime-boost regimen
  • Salmonella vaccine
  • Yersinia pestis

ASJC Scopus subject areas

  • Molecular Medicine
  • Immunology and Microbiology(all)
  • veterinary(all)
  • Public Health, Environmental and Occupational Health
  • Infectious Diseases

Cite this

Liu, W. T., Lin, W. T., Tsai, C. C., Chuang, C. C., Liao, C. L., Lin, H. C., Hung, Y. W., Huang, S. S., Liang, C. C., Hsu, H. L., Wang, H-J., & Liu, Y. T. (2006). Enhanced immune response by amphotericin B following NS1 protein prime-oral recombinant Salmonella vaccine boost vaccination protects mice from dengue virus challenge. Vaccine, 24(31-32), 5852-5861. https://doi.org/10.1016/j.vaccine.2006.04.066