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Characterization of meningococcal serogroup B outer membrane vesicle vaccines from strain 44/76 after growth in

Nikos Tsolakos1, Kristian Lie, Karin Bolstad

  • 1National Institute for Biological Standards and Control, Health Protection Agency, Blanche Lane, South Mimms, Potters Bar, Hertfordshire EN6 3QG, UK.

Vaccine
|March 2, 2010
PubMed

Insights

Choosing the right growth medium significantly impacts meningococcal outer membrane vesicle (OMV) vaccine composition and effectiveness. Modified Catlin-6 media (MC.6M) enhanced OMV immunogenicity in mice compared to Frantz

Area of Science:

  • Microbiology
  • Vaccinology
  • Immunology

Background:

  • Neisseria meningitidis serogroup B (MenB) poses a significant public health threat.
  • Outer membrane vesicle (OMV) vaccines are a key strategy for MenB prevention.
  • Optimizing OMV production is crucial for vaccine efficacy.

Purpose of the Study:

  • To investigate the impact of different growth media on MenB OMV composition.
  • To assess the immunogenicity of MenB OMVs produced in distinct media.
  • To identify specific OMV components affected by growth medium composition.

Main Methods:

  • Cultivation of the Norwegian serogroup B 44/76 vaccine strain in Frantz' and modified Catlin-6 (MC.6M) media.
  • Differential proteomic analysis of OMVs using high-resolution two-dimensional gel electrophoresis and mass spectrometry.
  • Evaluation of serum bactericidal titres in immunized mice.

Main Results:

  • Proteomic analysis revealed minimal changes in 97% of OMV proteins between media.
  • MC.6M cultivation led to increased levels of specific proteins (TdfH, OpcA, NMB0088, NMB2134, NMB1126/1164, NspA) and lipopolysaccharides.
  • OMVs produced in MC.6M elicited significantly higher serum bactericidal titres in mice.

Conclusions:

  • Growth medium composition critically influences MenB OMV immunogenicity.
  • MC.6M is a superior medium for producing immunogenic MenB OMVs.
  • Targeted optimization of growth media can enhance vaccine potency.

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