China Animal Husbandry & Veterinary Medicine ›› 2026, Vol. 53 ›› Issue (1): 81-93.doi: 10.16431/j.cnki.1671-7236.2026.01.008

• Review • Previous Articles     Next Articles

Advances in Recombinant Live Vector Vaccine

GUO Shuanglin1,2(), HAO Fei2, LIU Yongjie1, QIN Haoran2,3, CHEN Rong2, MA Sunting2, FENG Zhixin2, XIE Xing1,2,3()   

  1. 1.College of Veterinary Medicine,Nanjing Agricultural University,Nanjing 210014,China
    2.Key Laboratory for Veterinary Bio-product Engineering and Technology,Ministry of Agriculture and Rural Affairs,Institute of Veterinary Medicine,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China
    3.College of Veterinary Medicine,Yangzhou University,Yangzhou 225009,China
  • Received:2025-04-15 Online:2026-01-05 Published:2025-12-26
  • Contact: XIE Xing E-mail:gsl5050@163.com;yzxx1989@163.com

Abstract:

Recombinant live vector vaccines utilize attenuated pathogens as carriers to deliver target antigens, offering distinct advantages including potent immunogenicity, cost-effective production, and flexible immunization strategies. These vaccines demonstrate broad prospects in infectious disease prevention and tumor immunotherapy. This review systematically summarizes recent advances in bacterial and viral vector-based vaccines, with particular focus on their antigen expression characteristics, suitable animal models, and immunization efficacy. Regarding bacterial vectors, genetically modified Bacillus Calmette-Guérin expressing Mycobacterium tuberculosis antigens or immunomodulators significantly enhances immunization efficacy. Salmonella vectors exhibit outstanding performance in mucosal immunization and cancer therapy due to their suitability for oral administration. Lactic acid bacteria, as safe delivery platforms, effectively induce both mucosal and systemic immune responses. Additionally, Escherichia coli and Bacillus subtilis have shown promising progress in developing anti-infection and anti-tumor vaccines. Among viral vectors, Adenoviruses have been successfully employed in Coronavirus disease 2019 (COVID-19) and swine influenza vaccines owing to their high transduction efficiency. Poxviruses are ideal for multivalent vaccine design due to their large capacity for foreign gene insertion. Herpesviruses demonstrate excellent immunogenicity when expressing Foot-and-mouth disease virus or Influenza virus antigens, while maintaining high safety profiles due to their restricted host range. RNA virus vectors such as Newcastle disease virus and Porcine reproductive and respiratory syndrome virus serve as promising platforms for polyvalent vaccines, leveraging their unique replication features. Furthermore, enterovirus vectors show potential for treating neurological disorders. Despite these achievements, further improvements in immunogenicity, safety optimization, and scalable manufacturing remain key research priorities. This review provides valuable insights to guide future development and clinical translation of live vector vaccines.

Key words: recombinant vaccines; immunization efficacy; viral vector; bacterial vector

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