Differential impact ofl-arginine deprivation on the activation and effector functions of T cells and macrophages
Open Access
- 13 November 2008
- journal article
- extracellular mediators-and-effector-molecules
- Published by Oxford University Press (OUP) in Journal of Leukocyte Biology
- Vol. 85 (2), 268-277
- https://doi.org/10.1189/jlb.0508310
Abstract
The metabolism of the amino acid l-arginine is emerging as a crucial mechanism for the regulation of immune responses. Here, we characterized the impact of l-arginine deprivation on T cell and macrophage (MΦ) effector functions: We show that whereas l-arginine is required unconditionally for T cell activation, MΦ can up-regulate activation markers and produce cytokines and chemokines in the absence of l-arginine. Furthermore, we show that l-arginine deprivation does not affect the capacity of activated MΦ to up-regulate l-arginine-metabolizing enzymes such as inducible NO synthase and arginase 1. Thus, our results show that to exert their effector functions, T cells and MΦ have different requirements for l-arginine.Keywords
Funding Information
- The Wellcome Trust (076078/Z/04/Z, 07664/Z/05/Z)
This publication has 59 references indexed in Scilit:
- Impaired nitric oxide bioavailability and l-arginine–reversible endothelial dysfunction in adults with falciparum malariaThe Journal of Experimental Medicine, 2007
- l -Arginine Availability Regulates Inducible Nitric Oxide Synthase-Dependent Host Defense against Helicobacter pyloriInfection and Immunity, 2007
- Multifunctional TH1 cells define a correlate of vaccine-mediated protection against Leishmania majorNature Medicine, 2007
- Arginase activity mediates reversible T cell hyporesponsiveness in human pregnancyEuropean Journal of Immunology, 2007
- l-arginine availability regulates T-lymphocyte cell-cycle progressionBlood, 2006
- Regulation of immune responses by L-arginine metabolismNature Reviews Immunology, 2005
- iNOS-mediated nitric oxide production and its regulationLife Sciences, 2004
- Alternative activation of macrophagesNature Reviews Immunology, 2003
- Natural resistance and nitric oxideCell, 1995
- Arginase Induction by Suppressors of Nitric Oxide Synthesis (IL-4, IL-10 and PGE2) in Murine Bone-Marrow-Derived MacrophagesBiochemical and Biophysical Research Communications, 1995