2. Academic Validation
  3. Monocarboxylate transporter MCT1 is a target for immunosuppression

Monocarboxylate transporter MCT1 is a target for immunosuppression

  • Nat Chem Biol. 2005 Dec;1(7):371-6. doi: 10.1038/nchembio744.
Clare M Murray 1,  Raymond Hutchinson,  John R Bantick,  Graham P Belfield,  Amanda D Benjamin,  Diana Brazma,  Robert V Bundick,  I David Cook,  Robert I Craggs,  Susan Edwards,  Leslie R Evans,  Richard Harrison,  Elain Holness,  Andrew P Jackson,  Clive G Jackson,  Lee P Kingston,  Matthew W D Perry,  Andrew R J Ross,  Paul A Rugman,  Sasvinder S Sidhu,  Michael Sullivan,  David A Taylor-Fishwick,  P Craig Walker,  Yvonne M Whitehead,  David J Wilkinson,  Andrew Wright,  David K Donald
Affiliations

Affiliation

  • 1 Department of Discovery BioScience, AstraZeneca R&D Charnwood, Bakewell Road, Loughborough, Leicestershire LE11 5RH, UK.
PMID: 16370372 DOI: 10.1038/nchembio744
Abstract

Current immunosuppressive therapies act on T lymphocytes by modulation of cytokine production, modulation of signaling pathways or by inhibition of the Enzymes of nucleotide biosynthesis. We have identified a previously unknown series of immunomodulatory compounds that potently inhibit human and rat T lymphocyte proliferation in vitro and in vivo in immune-mediated animal models of disease, acting by a novel mechanism. Here we identify the target of these compounds, the Monocarboxylate Transporter MCT1 (SLC16A1), using a strategy of photoaffinity labeling and proteomic characterization. We show that inhibition of MCT1 during T lymphocyte activation results in selective and profound inhibition of the extremely rapid phase of T cell division essential for an effective immune response. MCT1 activity, however, is not required for many stages of lymphocyte activation, such as cytokine production, or for most normal physiological functions. By pursuing a chemistry-led target identification strategy, we have discovered that MCT1 is a previously unknown target for immunosuppressive therapy and have uncovered an unsuspected role for MCT1 in immune biology.

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