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Humanized Mouse Model to Study Bacterial Infections Targeting the Microvasculature
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Factor H and neisserial pathogenesis

Jo Anne Welsch1, Sanjay Ram

  • 1Children's Hospital Oakland Research Institute, Oakland, CA, USA.

Vaccine
|April 24, 2009
PubMed

Insights

Neisseria meningitidis uses factor H binding protein (fHbp) to evade human complement killing, impacting vaccine development. Understanding this interaction is crucial for effective meningococcal vaccines and accurate animal models.

Area of Science:

  • Microbiology
  • Immunology
  • Vaccinology

Background:

  • Neisseria gonorrhoeae and Neisseria meningitidis evade complement-dependent killing by binding to human factor H.
  • While gonococci use porin, meningococci utilize factor H binding protein (fHbp) for factor H interaction.

Purpose of the Study:

  • To investigate the role of fHbp in Neisseria meningitidis's evasion of complement.
  • To highlight implications for meningococcal vaccine development and animal model studies.

Main Methods:

  • Analysis of factor H binding mechanisms in Neisseria species.
  • Investigation of complement resistance in relation to human and animal complement sources.

Main Results:

  • Neisseria meningitidis employs fHbp to bind factor H, enhancing survival against complement-mediated lysis.
  • Meningococci exhibit human-specific complement resistance, being more susceptible to animal complement.

Conclusions:

  • fHbp is a key factor in meningococcal complement evasion and a promising vaccine antigen target.
  • Species-specific complement evasion necessitates careful consideration for evaluating vaccine efficacy in animal models.

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