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Active and Passive Immunization Against Staphylococcus aureus Periprosthetic Osteomyelitis in Rats.

Niels H Søe1, Nina Vendel Jensen2, Asger Lundorff Jensen3

  • 1Hand Section, Department of Orthopaedics, Herlev and Gentofte University Hospital, Hellerup, Denmark Niels.Soee.Nielsen@regionh.dk.

In Vivo (Athens, Greece)
|January 9, 2017
PubMed
Summary

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Clinical and translational science·2026
This summary is machine-generated.

Active immunization against polysaccharide poly-N-acetylglucosamine (PNAG) reduced Staphylococcus aureus osteomyelitis in rats. Passive immunization showed broader, but less specific, protection against S. aureus implant infections.

Area of Science:

  • Orthopedic surgery
  • Infectious disease
  • Immunology

Background:

  • Staphylococcus aureus infections pose challenges in orthopedic implant settings.
  • Developing effective immune responses against implant-related osteomyelitis is crucial.
  • Current treatments for implant-associated S. aureus infections are limited.

Purpose of the Study:

  • To investigate the efficacy of active and passive immunization strategies against Staphylococcus aureus osteomyelitis in a rat knee prosthesis model.
  • To explore the potential of targeting polysaccharide poly-N-acetylglucosamine (PNAG) for immune intervention.

Main Methods:

  • A rat knee prosthesis model was established with Staphylococcus aureus (S. aureus) induced osteomyelitis.
  • Fifty-two rats were divided into active immunization (synthetic PNAG) and passive immunization (S. aureus immunoglobulin) groups.
Keywords:
Osteomyelitisica+ strainica− strainimmunizationimplant-related infection Staphylococcus aureusvaccine

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  • Bacterial inoculum and knee prosthesis were introduced into the tibia and femur marrow.

    • Main Results:

    • Active immunization targeting PNAG significantly reduced osteomyelitis caused by PNAG-producing S. aureus (ica+).
    • Active immunization was ineffective against S. aureus strains lacking PNAG production (ica-).
    • Passive immunization provided clinical improvements for both ica+ and ica- S. aureus challenges, indicating broader but less specific activity.

    Conclusions:

    • Active immunization against PNAG shows promise for specific S. aureus implant infections.
    • Passive immunization offers a broader, albeit less specific, therapeutic avenue for S. aureus osteomyelitis.
    • Further research is needed to optimize immunotherapeutic strategies for implant-associated S. aureus infections.