Mechanism of measles virus-induced suppression of inflammatory immune responses

J C Marie1, J Kehren, M C Trescol-Biémont

  • 1INSERM U503, CERVI, Immunobiologie Fondamentale et Clinique, 69365, Lyon, France.

Immunity
|February 13, 2001
PubMed

Insights

Measles virus (MV) proteins alone can suppress the immune system in mice, offering a new model to study measles and test vaccines. This research identifies specific viral proteins and cellular pathways involved in immune suppression.

Area of Science:

  • Virology
  • Immunology
  • Pathogen-host interactions

Background:

  • Measles virus (MV) causes severe immunosuppression, leading to high infant mortality, but the underlying mechanisms remain unclear.
  • A lack of suitable animal models has hindered research into MV-induced immune dysfunction.

Purpose of the Study:

  • To investigate the mechanisms by which measles virus proteins induce systemic immunosuppression.
  • To establish a novel animal model for studying MV-induced immune modulation and evaluating anti-measles vaccines.

Main Methods:

  • Utilized a mouse model to study the effects of specific MV proteins without viral replication.
  • Investigated two distinct pathways involving MV nucleoprotein/FcgammaR and MV glycoproteins/CD46.
  • Assessed immune responses including hypersensitivity, dendritic cell function, IL-12 production, and T cell proliferation.

Main Results:

  • Specific MV proteins, independent of replication, induced systemic immunosuppression in mice.
  • Identified two pathways: MV nucleoprotein-FcgammaR on dendritic cells and MV glycoproteins-CD46.
  • Observed impaired dendritic cell function, reduced IL-12 production, and diminished antigen-specific T cell proliferation.

Conclusions:

  • Introduced a novel mouse model for evaluating the immunosuppressive potential of anti-measles vaccines.
  • Revealed specific mechanisms of MV-induced immune modulation, highlighting the roles of nucleoprotein and glycoproteins.

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