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Minocycline differentially modulates viral infection and persistence in an experimental model of Japanese

Kallol Dutta1, Kanhaiya Lal Kumawat, Arshed Nazmi

  • 1National Brain Research Centre, Manesar, Haryana, India. kallol4u@gmail.com

Journal of Neuroimmune Pharmacology : the Official Journal of the Society on Neuroimmune Pharmacology
|July 17, 2010
PubMed

Insights

Minocycline treatment mitigates Japanese encephalitis virus (JEV) infection effects in peripheral organs. The antibiotic reduced inflammation markers and immune cell infiltration in spleen and lymph nodes, despite viral persistence.

Area of Science:

  • Neurovirology
  • Immunology
  • Pharmacology

Background:

  • Japanese encephalitis (JE) is a severe neurotropic flavivirus infection.
  • JEV evades the host's peripheral innate immune response.
  • Minocycline has been identified as a potential protective drug against JE.

Purpose of the Study:

  • To investigate time-dependent changes in spleen and lymph nodes during JEV infection.
  • To evaluate the efficacy of minocycline in peripheral organs affected by JEV.
  • To understand minocycline's impact on immune responses and cellular changes in JEV-infected peripheral tissues.

Main Methods:

  • Cytometric bead array to quantify IL-12 and MCP-1 levels.
  • Immunohistochemical analysis of CD3, CD11b positive cells, and JEV antigen in tissue cryosections.
  • Time-dependent assessment of JEV infection in spleen and lymph nodes with and without minocycline treatment.

Main Results:

  • JEV infection led to a time-dependent increase in IL-12 and MCP-1 levels in peripheral organs.
  • Increased CD3 and CD11b positive cells were observed in infected tissues, correlating with cytokine elevation.
  • Minocycline treatment significantly reduced these inflammatory markers and CD11b positive cells, and altered spleen structure.

Conclusions:

  • Minocycline effectively abrogates JEV-induced inflammatory changes in peripheral organs.
  • The drug modulates immune cell populations, particularly CD11b positive cells, in spleen and lymph nodes.
  • Minocycline shows therapeutic potential for managing peripheral manifestations of Japanese encephalitis.

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