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Reduction in CD1d expression on dendritic cells and macrophages by an acute virus infection

Yinling Lin1, Tonya J Roberts, Philip M Spence

  • 1Department of Microbiology and Immunology, Indiana University School of Medicine, The Walther Oncology Center, and The Walther Cancer Institute, Indianapolis, IN 46202-5181, USA.

Journal of Leukocyte Biology
|November 19, 2004
PubMed

Insights

Acute viral infections, including lymphocytic choriomeningitis virus (LCMV), decrease CD1d expression on immune cells. This reduction in CD1d expression on dendritic cells and macrophages may impact antiviral immunity.

Area of Science:

  • Immunology
  • Virology
  • Cellular Biology

Background:

  • CD1d molecules present lipid antigens to natural killer T (NKT) cells, playing a crucial role in immune regulation.
  • Altered CD1d expression can significantly impact the adaptive and innate immune responses.
  • Understanding changes in CD1d expression during viral infections is vital for developing effective immunotherapies.

Purpose of the Study:

  • To investigate the modulation of CD1d expression on immune cells during acute viral infections.
  • To determine the kinetics and underlying mechanisms of CD1d downregulation post-infection.

Main Methods:

  • Mice were infected with lymphocytic choriomeningitis virus (LCMV), vaccinia virus, and vesicular stomatitis virus.
  • Flow cytometry was used to analyze CD1d cell-surface expression on splenic dendritic cells (DC) and macrophages (MPhi).
  • Interferon-gamma, interleukin-12, and transporter associated with antigen processing-1 (TAP1) deficiency were assessed for their roles.

Main Results:

  • A significant decrease in CD1d expression on splenic DC and MPhi was observed for at least 3 months following LCMV infection.
  • Similar reductions in CD1d expression were induced by vaccinia virus and vesicular stomatitis virus.
  • The downregulation of CD1d was independent of interferon-gamma and interleukin-12.
  • Partial recovery of CD1d expression was noted in TAP1-deficient mice, indicating a potential role for CD8+ T cells.

Conclusions:

  • Induction of a cellular immune response during acute viral infections leads to altered CD1d expression.
  • Changes in CD1d expression may represent a key regulatory mechanism in antiviral immunity.
  • Further research into the role of CD8+ T cells in modulating CD1d expression is warranted.

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