Expression of an immunogenic F1-V fusion protein in lettuce as a plant-based vaccine against plague

Sergio Rosales-Mendoza, Ruth E. Soria-Guerra, Leticia Moreno-Fierros, Ángel G. Alpuche-Solís, Luzmila Martínez-González, Schuyler S. Korban

Research output: Contribution to journalArticlepeer-review


Yersinia pestis is a pathogenic agent that causes the bubonic and pneumonic plague. The development of an efficient and low-cost oral vaccine against these diseases is highly desirable. In this study, the immunogenic fusion protein F1-V from Y. pestis was introduced into lettuce via Agrobacterium-mediated transformation, and putative transgenic lines were developed. The presence of the transgene in these putative transgenic lines was determined using polymerase chain reaction (PCR), and transgene integration and transgene copy number were confirmed following Southern blot analysis. The presence of specific F1-V transcripts was confirmed by reverse-transcriptase (RT)-PCR. Using monoclonal antibodies, ELISA and western blot analysis revealed that the expected antigenic F1-V protein was successfully expressed in transgenic lines. Mice immunized subcutaneously with lettuce expressing the F1-V antigen developed systemic humoral responses as 'proof of concept' of using lettuce as a production platform for the F1-V immunogen that could be used as a candidate plant-based vaccine against plague.

Original languageEnglish (US)
Pages (from-to)409-416
Number of pages8
Issue number2
StatePublished - Jul 2010


  • Antigenic fusion protein
  • Plague
  • Plant-based vaccine
  • Transgenic plants
  • Yersinia pestis

ASJC Scopus subject areas

  • Genetics
  • Plant Science


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