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Antigenic variation between human respiratory syncytial virus isolates.

H B Gimenez, N Hardman, H M Keir

    The Journal of General Virology
    |May 1, 1986
    PubMed
    Summary

    Researchers identified two distinct antigenic types of human respiratory syncytial virus (RSV) by analyzing variations in its fusion protein (VP70) and phosphoprotein (VPP32) using hybridoma antibodies. This antigenic diversity was observed across 41 RSV isolates collected globally over 29 years.

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    Antonie van Leeuwenhoek·2002

    Area of Science:

    • Virology
    • Immunology

    Background:

    • Human respiratory syncytial virus (RSV) is a major cause of respiratory illness.
    • Antigenic diversity within RSV strains can impact vaccine and therapeutic strategies.

    Purpose of the Study:

    • To investigate antigenic variation among human RSV isolates using monoclonal antibodies.
    • To identify distinct antigenic types of RSV based on epitope recognition.

    Main Methods:

    • Preparation of three hybridoma antibodies against the RSN-2 strain of human RSV.
    • Analysis of 41 RSV isolates collected globally over 29 years using immunofluorescence and immunoblotting.
    • Characterization of antibody reactivity against the virus fusion protein (VP70) and phosphoprotein (VPP32).

    Main Results:

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    • One antibody targeting VP70 recognized a conserved antigenic site present in 21 of 41 isolates.
    • Two antibodies targeting VPP32 identified two distinct antigenic sites; one site was conserved across all isolates, while the other varied.
    • Two major antigenic types of human RSV were identified based on variable epitope recognition.
    • Electrophoretic mobility of VPP32 correlated with antigenic variation.

    Conclusions:

    • Human RSV exhibits significant antigenic variation, primarily associated with its phosphoprotein.
    • The identification of two antigenic types has implications for understanding RSV epidemiology and developing targeted interventions.
    • Monoclonal antibodies are valuable tools for characterizing viral antigenic diversity.