Comparative proteomic analysis of outer membrane vesicles from Brucella suis, Brucella ovis, Brucella canis and Brucella neotomae

María del Socorro Ruiz-Palma, Eric Daniel Avila-Calderón, Ma Guadalupe Aguilera-Arreola, Ahidé López-Merino, Enrico A. Ruiz, María del Rosario Morales-García, Edgar Oliver López-Villegas, Zulema Gomez-Lunar, Beatriz Arellano-Reynoso, Araceli Contreras-Rodríguez

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Gram-negative bacteria release nanovesicles, called outer membrane vesicles (OMVs), from their outer membrane. Proteomics has been used to determine their composition. OMVs contain proteins able to elicit an immune response, so they have been proposed as a model to develop acellular vaccines. In this study, OMVs of Brucella suis, B. ovis, B. canis, and B. neotomae were purified and analyzed by SDS-PAGE, transmission electron microscopy and liquid chromatography coupled to mass spectrometry to determine the pan-proteome of these vesicles. In addition, antigenic proteins were detected by western blot with anti-Brucella sera. The in silico analysis of the pan-proteome revealed many homologous proteins, such as Omp16, Omp25, Omp31, SodC, Omp2a, and BhuA. Proteins contained in the vesicles from different Brucella species were detected by anti-Brucella sera. The occurrence of previously described immunogenic proteins derived from OMVs supports the use of these vesicles as candidates to be evaluated as an acellular brucellosis vaccine.

    Original languageEnglish
    JournalArchives of Microbiology
    DOIs
    StateAccepted/In press - 2021

    Keywords

    • Acellular vaccines
    • Bacterial vesicles
    • Brucellosis
    • Outer membrane vesicles

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