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Interactions between major histocompatibility complex class II surface expression and HIV: implications for

W Kamp1, E C Breij, H S Nottet

  • 1Fight for Life Foundation, Amsterdam, the Netherlands.

European Journal of Clinical Investigation
|December 12, 2001
PubMed
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Human immunodeficiency virus (HIV) pathogenesis involves complex interactions with major histocompatibility complex (MHC) Class II. HIV can exploit both low and high MHC-II expression for viral replication and infectivity.

Area of Science:

  • Immunology
  • Virology
  • Cell Biology

Background:

  • Acquired immunodeficiency syndrome (AIDS) pathogenesis remains incompletely understood despite decades of research.
  • Major histocompatibility complex (MHC) Class I (MHC-I) down-regulation by human immunodeficiency virus (HIV) impacts immune response.
  • The role of MHC Class II (MHC-II) in HIV pathogenesis is complex and not fully elucidated.

Purpose of the Study:

  • To investigate the multifaceted interactions between HIV and MHC-II expression.
  • To clarify how varying MHC-II levels influence HIV pathogenesis and viral lifecycle.

Main Methods:

  • Analysis of MHC-II surface expression on HIV-infected monocytes and monocytic cell lines.
  • Comparison of expression levels between infected and uninfected control monocytes.

Related Experiment Videos

  • Investigation of HIV-specific and host-specific mechanisms modulating MHC-II expression.

    • Main Results:

    • HIV-specific mechanisms down-regulate MHC-II on blood monocytes during HIV-1 infection.
    • Host mechanisms up-regulate MHC-II on blood monocytes and brain macrophages in response to infection.
    • Both decreased and increased MHC-II surface expression were observed in HIV-infected cells compared to controls.

    Conclusions:

    • HIV appears to benefit from both low and high MHC-II surface expression levels.
    • Low MHC-II levels may reduce immune surveillance, facilitating viral replication.
    • High MHC-II levels might enhance viral infectivity through increased density on macrophages and virions.