Influence of caudovirales phages on humoral immunity inmice

Anton Chechushkov, Yuliya Kozlova, Ivan Baykov, Vera Morozova, Bogdana Kravchuk, Tatyana Ushakova, Alevtina Bardasheva, Ekaterina Zelentsova, Lina Al Allaf, Artem Tikunov, Valentin Vlassov, Nina Tikunova

Research output: Contribution to journalArticlepeer-review

Abstract

Bacteriophages are promising antibacterial agents. Although they have been recognized as bacterial viruses and are considered to be non-interacting with eukaryotic cells, there is growing evidence that phages may have a significant impact on the immune system via interactions with macrophages, neutrophils, and T-cell polarization. In this study, the influence of phages of podovirus, siphovirus, and myovirus morphotypes on humoral immunity of CD-1 mice was investigated. In addition, tissue distribution of the phages was tested in these mice. No common patterns were found either in the distribution of phages in mice or in changes in the levels of cytokines in the sera of mice once injected with phages. Importantly, pre-existing IgM-class antibodies directed against capsid proteins of phages with myovirus and siphovirus morphotypes were identified in mice before immunization. After triple immunization of CD1-mice with phages without any adjuvant, levels of anti-phage serum polyclonal IgG antibodies increased. Immunogenic phage proteins recognized by IgM and/or IgG antibodies were identified usingWestern blot analysis and mass spectrometry. In addition, mice serum collected after immunization demonstrated neutralizing properties, leading to a substantial decrease in infectivity of investigated phages with myovirus and siphovirus morphotypes. Moreover, serum samples collected before administration of these phages exhibited some ability to reduce the phage infectivity. Furthermore, Proteus phage PM16 with podovirus morphotype did not elicit IgM or IgG antibodies in immunized mice, and no neutralizing activities against PM16 were revealed in mouse serum samples before and after immunization.

Original languageEnglish
Article number1241
JournalViruses
Volume13
Issue number7
DOIs
Publication statusPublished - Jul 2021

Keywords

  • Antibodies
  • Bacteriophage
  • Future medicine
  • Humoral immunity
  • IgG
  • IgM
  • Immunogenicity
  • Neutralization
  • Phage therapy

OECD FOS+WOS

  • 3.03.NN INFECTIOUS DISEASES
  • 1.06.ZE VIROLOGY

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