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Regulatory role of CD1d in neurotropic virus infection

Ikuo Tsunoda1, Tomoko Tanaka, Robert S Fujinami

  • 1Department of Pathology, Division of Cell Biology & Immunology, University of Utah School of Medicine, 30 North 1900 East, MREB, Room 218, Salt Lake City, UT 84132, USA. ikuo.tsunoda@hsc.utah.edu

Journal of Virology
|August 8, 2008
PubMed

Insights

CD1d-restricted natural killer T (NKT) cells may protect against Theiler's murine encephalomyelitis virus (TMEV) neurological disease. Deficiency in CD1d exacerbated TMEV infection outcomes, suggesting NKT cells are crucial for viral clearance and immune regulation.

Area of Science:

  • Immunology
  • Neuroscience
  • Virology

Background:

  • Theiler's murine encephalomyelitis virus (TMEV) infection in mice serves as a model for central nervous system (CNS) diseases, including multiple sclerosis.
  • CD1d-restricted natural killer T (NKT) cells are known to modulate immune responses and viral infections.

Purpose of the Study:

  • To investigate the role of CD1d in TMEV infection and its impact on neurological disease development.
  • To determine if CD1d-restricted NKT cells influence TMEV pathogenesis and immune responses.

Main Methods:

  • Infection of CD1d-deficient (CD1(-/-)) and wild-type (WT) mice with GDVII and DA strains of TMEV.
  • Assessment of viral load, inflammation, demyelination, and immune cell responses in the CNS.
  • Analysis of TMEV-specific lymphoproliferative responses and cytokine production (IL-4, IFN-γ).

Main Results:

  • CD1(-/-) mice exhibited increased susceptibility to GDVII TMEV infection compared to WT mice.
  • CD1(-/-) mice showed exacerbated neurological deficits and developed demyelination following DA TMEV infection, unlike WT mice.
  • Higher TMEV-specific lymphoproliferative responses and elevated IL-4/IFN-γ ratios were observed in CD1(-/-) mice.

Conclusions:

  • CD1d-restricted NKT cells appear to play a protective role in TMEV-induced neurological disease.
  • CD1d deficiency alters the immune response, leading to increased susceptibility and demyelination.
  • NKT cells may influence TMEV pathogenesis by modulating cytokine profiles and virus-specific immunity.

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