Frontiers in Microbiology (Jul 2024)

QcrC is a potential target for antibody therapy and vaccination to control Campylobacter jejuni infection by suppressing its energy metabolism

  • Koji Hosomi,
  • Koji Hosomi,
  • Noritoshi Hatanaka,
  • Noritoshi Hatanaka,
  • Noritoshi Hatanaka,
  • Atsushi Hinenoya,
  • Atsushi Hinenoya,
  • Atsushi Hinenoya,
  • Jun Adachi,
  • Yoko Tojima,
  • Yoko Tojima,
  • Mari Furuta,
  • Mari Furuta,
  • Keita Uchiyama,
  • Keita Uchiyama,
  • Makiko Morita,
  • Makiko Morita,
  • Takahiro Nagatake,
  • Takahiro Nagatake,
  • Azusa Saika,
  • Azusa Saika,
  • Soichiro Kawai,
  • Soichiro Kawai,
  • Ken Yoshii,
  • Ken Yoshii,
  • Saki Kondo,
  • Saki Kondo,
  • Shinji Yamasaki,
  • Shinji Yamasaki,
  • Shinji Yamasaki,
  • Jun Kunisawa,
  • Jun Kunisawa,
  • Jun Kunisawa,
  • Jun Kunisawa,
  • Jun Kunisawa,
  • Jun Kunisawa,
  • Jun Kunisawa,
  • Jun Kunisawa,
  • Jun Kunisawa

DOI
https://doi.org/10.3389/fmicb.2024.1415893
Journal volume & issue
Vol. 15

Abstract

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IntroductionCampylobacter spp. are a public health concern, yet there is still no effective vaccine or medicine available.MethodsHere, we developed a Campylobacter jejuni-specific antibody and found that it targeted a menaquinol cytochrome c reductase complex QcrC.ResultsThe antibody was specifically reactive to multiple C. jejuni strains including clinical isolates from patients with acute enteritis and was found to inhibit the energy metabolism and growth of C. jejuni. Different culture conditions produced different expression levels of QcrC in C. jejuni, and these levels were closely related not only to the energy metabolism of C. jejuni but also its pathogenicity. Furthermore, immunization of mice with recombinant QcrC induced protective immunity against C. jejuni infection.DiscussionTaken together, our present findings highlight a possible antibody- or vaccination-based strategy to prevent or control Campylobacter infection by targeting the QcrC-mediated metabolic pathway.

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