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[The immunogenicity and heterogeneity of Pseudomonas pseudomallei surface antigen 8]

N N Piven', V I Smirnova, D V Viktorov

    Zhurnal Mikrobiologii, Epidemiologii I Immunobiologii
    |July 1, 1996
    PubMed

    Insights

    Surface antigen 8 from P. pseudomallei contains various proteins and a glycoprotein. Specific fragments, like the 34 kD protein, show significant immunogenic effects, offering potential for vaccine development.

    Area of Science:

    • Microbiology
    • Immunology
    • Biochemistry

    Background:

    • Surface antigen 8 is a key pathogenicity factor of P. pseudomallei.
    • This antigen possesses antiphagocytic properties, contributing to bacterial virulence.

    Purpose of the Study:

    • To characterize the molecular composition and functional activities of P. pseudomallei Surface antigen 8.
    • To identify specific components responsible for the antigen's immunological effects.

    Main Methods:

    • Fractionation of Surface antigen 8 using gel and ion exchange chromatography.
    • Analysis of isolated fragments for antigenic components, antiphagocytic activity, and protective effects.

    Main Results:

    • Surface antigen 8 comprises a 200 kD glycoprotein and proteins of 25, 30, and 34 kD.
    • The carbohydrate portion is a polymer of 6-d-D-mannoheptose; the protein component ranges from 12-120 kD.
    • The 200 kD glycoprotein acts as an immunosuppressive agent.
    • The 34 kD protein demonstrates a significant immunogenic effect.

    Conclusions:

    • Individual fragments of Surface antigen 8 exhibit distinct immunological activities.
    • The 34 kD protein fragment is a promising candidate for developing immunogenic strategies against P. pseudomallei infections.

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