Journal of Clinical and Cellular Immunology
Open Access

Laurent Hannoun

Publications

• Research Article
  Measurement of Indoleamine 2, 3 Dioxygenase Activity in Colorectal Cancer: A Controlled Group Study
  Author(s): Daniel Eyraud, Benjamin Granger, Noel Zahr, Frédéric Charlotte, Armelle Bardier, Gaëlle Gottrand, Audrey Perez-Lascar, Mehdi Karoui, Louis Lemoine, Jean Christophe Vaillant, David Klatzmann, Laurent Hannoun and Pierre CoriatDaniel Eyraud, Benjamin Granger, Noel Zahr, Frédéric Charlotte, Armelle Bardier, Gaëlle Gottrand, Audrey Perez-Lascar, Mehdi Karoui, Louis Lemoine, Jean Christophe Vaillant, David Klatzmann, Laurent Hannoun and Pierre Coriat
  
  Background: Indoleamine 2,3-dioxygenase (IDO), the rate-limiting enzyme that converts tryptophan (Trp) to kynurenine (Kyn), suppresses antitumor immune responses via depletion of Trp and accumulation of Kyn. We hypothesized that, in colorectal cancer (CRC), IDO activity may serve as a biomarker and thus we compared the IDO activity between patients with CRC and those without CRC. We further assessed the effect of surgical treatment of CRC on IDO activity.Methods: Serum concentrations of Trp and Kyn were measured by high performance liquid chromatography in the sera of 68 patients with CRC (CRC group) and 38 without CRC (Control group) prior surgery (D0) and 7 days after surgery (D7). The IDO activity was estimated by the serum Kyn-to-Trp ratio (Kyn/Trp ratio).Results: At Day 0, serum Kyn concentration was higher in the CRC.. View More»
  DOI: 10.4172/2155-9899.1000374

  Abstract PDF

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