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Related Experiment Videos

FTY720 suppresses CD4+CD44highCD62L- effector memory T cell-mediated colitis.

R Fujii1, T Kanai, Y Nemoto

  • 1Department of Gastroenterology and Hepatology, Graduate School, Tokyo Medical and Dental University, Tokyo 113-8519, Japan.

American Journal of Physiology. Gastrointestinal and Liver Physiology
|April 1, 2006
PubMed
Summary
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FTY720, an immunomodulator, prevents colitis by reducing memory T cell migration. This drug targets sphingosine-1-phosphate receptors, offering potential treatment for autoimmune diseases like inflammatory bowel disease.

Area of Science:

  • Immunology
  • Pharmacology

Background:

  • FTY720 (fingolimod) is a sphingosine-derived immunomodulator.
  • It suppresses immune responses by trapping lymphocytes in lymphoid organs.
  • Its precise mechanism controlling memory T cell migration remains unclear.

Purpose of the Study:

  • To investigate how FTY720 influences the migration of memory T cells.
  • To assess FTY720's efficacy in preventing T cell-mediated colitis.
  • To identify specific T cell populations targeted by FTY720.

Main Methods:

  • Adoptive transfer of lamina propria (LP) colitogenic effector memory CD4+ T cells (TEM cells) into severe combined immunodeficiency (SCID) mice.
  • Treatment of mice with FTY720.
  • Analysis of cytokine production (interferon-gamma, interleukin-2, tumor necrosis factor-alpha) by LP CD4+ T cells.

Related Experiment Videos

  • Quantification of T cell populations in spleen, peripheral blood, mesenteric lymph node, and LP.
  • Expression analysis of sphingosine-1-phosphate receptors on T cells.

    • Main Results:

    • FTY720 prevented the development of colitis induced by TEM cell transfer.
    • FTY720 suppressed pro-inflammatory cytokine production by LP CD4+ T cells.
    • FTY720 significantly reduced CD4+ T cell numbers in multiple lymphoid organs and peripheral blood.
    • LP CD4+ TEM cells and splenic CD4+CD45RBhigh T cells expressed FTY720 target receptors.
    • FTY720 also prevented colitis induced by splenic CD4+CD45RBhigh T cell transfer.

    Conclusions:

    • FTY720 effectively inhibits T cell-mediated colitis by controlling memory T cell migration.
    • The drug targets sphingosine-1-phosphate receptors expressed on pathogenic T cells.
    • FTY720 demonstrates potential for preventing and treating autoimmune diseases, including inflammatory bowel diseases.