Abstract
Chronic inflammation in physically ill patients is often associated with the development of symptoms of depression. The mechanisms that are responsible for inflammation-associated depression have been elucidated over the last few years. Kynurenine produced from tryptophan in a reaction catabolized by indoleamine 2,3 dioxygenase is transported into the brain where it is metabolized by microglial enzymes into a number of neurotropic compounds including quinolinic acid, an agonist of N-methyl-d-aspartate receptors. Quinolinic acid can synergize with glutamate released by activated microglia. This chain of events opens the possibility to treat inflammation-induced depression using therapies that target the transport of kynurenine through the blood–brain barrier, the production of quinolinic acid and glutamate by activated microglia, or the efflux of glutamate from the brain to the blood.
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Andreetta F, Barnes NM, Wren PB, Carboni L (2013) p38 MAP kinase activation does not stimulate serotonin transport in rat brain: implications for sickness behaviour mechanisms. Life Sci 93:30–37. doi:10.1016/j.lfs.2013.05.014
Benton T, Staab J, Evans DL (2007) Medical co-morbidity in depressive disorders. Ann Clin Psychiatry Off J Am Acad Clin Psychiatr 19:289–303. doi:10.1080/10401230701653542
Berman RM et al (2000) Antidepressant effects of ketamine in depressed patients. Biol Psychiatry 47:351–354
Boado RJ, Li JY, Nagaya M, Zhang C, Pardridge WM (1999) Selective expression of the large neutral amino acid transporter at the blood–brain barrier. Proc Natl Acad Sci USA 96:12079–12084
Campos F et al (2011) Neuroprotection by glutamate oxaloacetate transaminase in ischemic stroke: an experimental study. J Cereb Blood Flow Metab Off J Int Soc Cereb Blood Flow Metab 31:1378–1386. doi:10.1038/jcbfm.2011.3
Capuron L et al (2002a) Neurobehavioral effects of interferon-alpha in cancer patients: phenomenology and paroxetine responsiveness of symptom dimensions. Neuropsychopharmacol Off Publ Am Coll Neuropsychopharmacol 26:643–652. doi:10.1016/S0893-133X(01)00407-9
Capuron L et al (2002b) Association between decreased serum tryptophan concentrations and depressive symptoms in cancer patients undergoing cytokine therapy. Mol Psychiatry 7:468–473. doi:10.1038/sj.mp.4000995
Cohen-Kashi-Malina K, Cooper I, Teichberg VI (2012) Mechanisms of glutamate efflux at the blood-brain barrier: involvement of glial cells. J Cereb Blood Flow Metab Off J Int Soc Cereb Blood Flow Metab 32:177–189. doi:10.1038/jcbfm.2011.121
Conrad M, Sato H (2012) The oxidative stress-inducible cystine/glutamate antiporter, system x(c) (−): cystine supplier and beyond. Amino Acids 42:231–246. doi:10.1007/s00726-011-0867-5
Dantzer R, O’Connor JC, Freund GG, Johnson RW, Kelley KW (2008) From inflammation to sickness and depression: when the immune system subjugates the brain. Nat Rev Neurosci 9:46–56. doi:10.1038/nrn2297
Denicoff KD et al (1987) The neuropsychiatric effects of treatment with interleukin-2 and lymphokine-activated killer cells. Ann Intern Med 107:293–300
Eastman CL, Guilarte TR (1989) Cytotoxicity of 3-hydroxykynurenine in a neuronal hybrid cell line. Brain Res 495:225–231
Elovainio M et al (2011) Moderating effect of indoleamine 2,3-dioxygenase (IDO) activation in the association between depressive symptoms and carotid atherosclerosis: evidence from the Young Finns study. J Affect Disord 133:611–614. doi:10.1016/j.jad.2011.04.025
Erhardt S et al (2013) Connecting inflammation with glutamate agonism in suicidality. Neuropsychopharmacology 38:743–752. doi:10.1038/npp.2012.248
Eugenin EA et al (2001) Microglia at brain stab wounds express connexin 43 and in vitro form functional gap junctions after treatment with interferon-gamma and tumor necrosis factor-alpha. Proc Natl Acad Sci USA 98:4190–4195. doi:10.1073/pnas.051634298
Evans DL et al (2005) Mood disorders in the medically ill: scientific review and recommendations. Biol Psychiatry 58:175–189. doi:10.1016/j.biopsych.2005.05.001
Fu X et al (2010) Central administration of lipopolysaccharide induces depressive-like behavior in vivo and activates brain indoleamine 2,3 dioxygenase in murine organotypic hippocampal slice cultures. J Neuroinflamm 7:43. doi:10.1186/1742-2094-7-43
Fukui S, Schwarcz R, Rapoport SI, Takada Y, Smith QR (1991) Blood-brain barrier transport of kynurenines: implications for brain synthesis and metabolism. J Neurochem 56:2007–2017
Gabbay V, Ely BA, Babb J, Liebes L (2012) The possible role of the kynurenine pathway in anhedonia in adolescents. J Neural Transm 119:253–260. doi:10.1007/s00702-011-0685-7
Garcia LS et al (2008) Acute administration of ketamine induces antidepressant-like effects in the forced swimming test and increases BDNF levels in the rat hippocampus. Progr Neuropsychopharmacol Biol Psychiatry 32:140–144
Gold AB et al (2011) The relationship between indoleamine 2,3-dioxygenase activity and post-stroke cognitive impairment. J Neuroinflamm 8:17. doi:10.1186/1742-2094-8-17
Goldberg D (2010) The detection and treatment of depression in the physically ill. World Psychiatry Off J World Psychiatr Assoc 9:16–20
Gras G et al (2012) EAAT expression by macrophages and microglia: still more questions than answers. Amino Acids 42:221–229. doi:10.1007/s00726-011-0866-6
Helms HC, Madelung R, Waagepetersen HS, Nielsen CU, Brodin B (2012) In vitro evidence for the brain glutamate efflux hypothesis: brain endothelial cells cocultured with astrocytes display a polarized brain-to-blood transport of glutamate. Glia 60:882–893. doi:10.1002/glia.22321
Heyes MP, Quearry BJ, Markey SP (1989) Systemic endotoxin increases l-tryptophan, 5-hydroxyindoleacetic acid, 3-hydroxykynurenine and quinolinic acid content of mouse cerebral cortex. Brain Res 491:173–179
Hosoya K, Sugawara M, Asaba H, Terasaki T (1999) Blood-brain barrier produces significant efflux of l-aspartic acid but not d-aspartic acid: in vivo evidence using the brain efflux index method. J Neurochem 73:1206–1211
Irwin MR, Miller AH (2007) Depressive disorders and immunity: 20 years of progress and discovery. Brain Behav Immun 21:374–383. doi:10.1016/j.bbi.2007.01.010
Kigerl KA et al (2012) System x(c)(−) regulates microglia and macrophage glutamate excitotoxicity in vivo. Exp Neurol 233:333–341. doi:10.1016/j.expneurol.2011.10.025
Kita T, Morrison PF, Heyes MP, Markey SP (2002) Effects of systemic and central nervous system localized inflammation on the contributions of metabolic precursors to the l-kynurenine and quinolinic acid pools in brain. J Neurochem 82:258–268
Kurz K, Schroecksnadel S, Weiss G, Fuchs D (2011) Association between increased tryptophan degradation and depression in cancer patients. Curr Opin Clin Nutr Metab Care 14:49–56. doi:10.1097/MCO.0b013e328340d849
Larkin GL, Beautrais A (2011) A preliminary naturalistic study of low-dose ketamine for depression and suicide ideation. Int J Neuropsychopharmacol 14:1127–1131
Lawson MA et al (2013) Intracerebroventricular administration of lipopolysaccharide induces indoleamine-2,3-dioxygenase-dependent depression-like behaviors. J Neuroinflamm 10:87. doi:10.1186/1742-2094-10-87
Leibowitz A, Boyko M, Shapira Y, Zlotnik A (2012) Blood glutamate scavenging: insight into neuroprotection. Int J Mol Sci 13:10041–10066. doi:10.3390/ijms130810041
Maeng S, Zarate CA Jr (2007) The role of glutamate in mood disorders: results from the ketamine in major depression study and the presumed cellular mechanism underlying its antidepressant effects. Curr Psychiatry Rep 9:467–474
Mattox ML, D’Angelo JA, Grimes ZM, Fiebiger E, Dickinson BL (2012) The cystine/glutamate antiporter regulates indoleamine 2,3-dioxygenase protein levels and enzymatic activity in human dendritic cells. Am J Clin Exp Immunol 1:113–123
Miller AH, Ancoli-Israel S, Bower JE, Capuron L, Irwin MR (2008) Neuroendocrine-immune mechanisms of behavioral comorbidities in patients with cancer. J Clin Oncol Off J Am Soc Clin Oncol 26:971–982. doi:10.1200/JCO.2007.10.7805
Moreau M et al (2008) Inoculation of Bacillus Calmette–Guerin to mice induces an acute episode of sickness behavior followed by chronic depressive-like behavior. Brain Behav Immun 22:1087–1095. doi:10.1016/j.bbi.2008.04.001
Nagy D et al (2010) Effects of blood glutamate scavenging on cortical evoked potentials. Cell Mol Neurobiol 30:1101–1106. doi:10.1007/s10571-010-9542-8
Nosyreva E et al (2013) Acute suppression of spontaneous neurotransmission drives synaptic potentiation. J Neurosci 33:6990–7002
O’Connor JC et al (2009a) Interferon-gamma and tumor necrosis factor-alpha mediate the upregulation of indoleamine 2,3-dioxygenase and the induction of depressive-like behavior in mice in response to bacillus Calmette–Guerin. J Neurosci Off J Soc Neurosci 29:4200–4209. doi:10.1523/JNEUROSCI.5032-08.2009
O’Connor JC et al (2009b) Induction of IDO by bacille Calmette–Guerin is responsible for development of murine depressive-like behavior. J Immunol 182:3202–3212. doi:10.4049/jimmunol.0802722
O’Connor JC et al (2009c) Lipopolysaccharide-induced depressive-like behavior is mediated by indoleamine 2,3-dioxygenase activation in mice. Mol Psychiatry 14:511–522. doi:10.1038/sj.mp.4002148
Obrenovitch TP, Urenjak J (2003) Accumulation of quinolinic acid with neuroinflammation: does it mean excitotoxicity? Adv Exp Med Biol 527:147–154
Omidi Y, Barar J, Ahmadian S, Heidari HR, Gumbleton M (2008) Characterization and astrocytic modulation of system L transporters in brain microvasculature endothelial cells. Cell Biochem Funct 26:381–391. doi:10.1002/cbf.1455
Piani D, Spranger M, Frei K, Schaffner A, Fontana A (1992) Macrophage-induced cytotoxicity of N-methyl-d-aspartate receptor positive neurons involves excitatory amino acids rather than reactive oxygen intermediates and cytokines. Eur J Immunol 22:2429–2436. doi:10.1002/eji.1830220936
Raison CL, Miller AH (2013) Do cytokines really sing the blues? Cerebrum Dana Forum Brain Sci 2013:10
Raison CL et al (2010) CSF concentrations of brain tryptophan and kynurenines during immune stimulation with IFN-alpha: relationship to CNS immune responses and depression. Mol Psychiatry 15:393–403. doi:10.1038/mp.2009.116
Raison CL et al (2013) A randomized controlled trial of the tumor necrosis factor antagonist infliximab for treatment-resistant depression: the role of baseline inflammatory biomarkers. J Am Med Assoc Psychiatry 70:31–41. doi:10.1001/2013.jamapsychiatry.4
Renault PF et al (1987) Psychiatric complications of long-term interferon alfa therapy. Arch Intern Med 147:1577–1580
Ruban A, Mohar B, Jona G, Teichberg VI (2013) Blood glutamate scavenging as a novel neuroprotective treatment for paraoxon intoxication. J Cereb Blood Flow Metab Off J Int Soc Cereb Blood Flow Metab. doi:10.1038/jcbfm.2013.186
Saito K, Markey SP, Heyes MP (1992) Effects of immune activation on quinolinic acid and neuroactive kynurenines in the mouse. Neuroscience 51:25–39
Schwarcz R, Bruno JP, Muchowski PJ, Wu HQ (2012) Kynurenines in the mammalian brain: when physiology meets pathology. Nat Rev Neurosci 13:465–477. doi:10.1038/nrn3257
Smith AJ, Smith RA, Stone TW (2009) 5-Hydroxyanthranilic acid, a tryptophan metabolite, generates oxidative stress and neuronal death via p38 activation in cultured cerebellar granule neurones. Neurotox Res 15:303–310. doi:10.1007/s12640-009-9034-0
Steiner J et al (2011) Severe depression is associated with increased microglial quinolinic acid in subregions of the anterior cingulate gyrus: evidence for an immune-modulated glutamatergic neurotransmission? J Neuroinflamm 8:94. doi:10.1186/1742-2094-8-94
Sublette ME, Postolache TT (2012) Neuroinflammation and depression: the role of indoleamine 2,3-dioxygenase (IDO) as a molecular pathway. Psychosom Med 74:668–672. doi:10.1097/PSY.0b013e318268de9f
Swardfager W et al (2009) Indoleamine 2,3-dioxygenase activation and depressive symptoms in patients with coronary artery disease. Psychoneuroendocrinology 34:1560–1566. doi:10.1016/j.psyneuen.2009.05.019
Takaki J et al (2012) l-Glutamate released from activated microglia downregulates astrocytic l-glutamate transporter expression in neuroinflammation: the ‘collusion’ hypothesis for increased extracellular l-glutamate concentration in neuroinflammation. J Neuroinflamm 9:275. doi:10.1186/1742-2094-9-275
Takeuchi H et al (2006) Tumor necrosis factor-alpha induces neurotoxicity via glutamate release from hemichannels of activated microglia in an autocrine manner. J Biol Chem 281:21362–21368. doi:10.1074/jbc.M600504200
Teichberg VI, Cohen-Kashi-Malina K, Cooper I, Zlotnik A (2009) Homeostasis of glutamate in brain fluids: an accelerated brain-to-blood efflux of excess glutamate is produced by blood glutamate scavenging and offers protection from neuropathologies. Neuroscience 158:301–308. doi:10.1016/j.neuroscience.2008.02.075
Tyring S et al (2006) Etanercept and clinical outcomes, fatigue, and depression in psoriasis: double-blind placebo-controlled randomised phase III trial. Lancet 367:29–35. doi:10.1016/S0140-6736(05)67763-X
van Heesch F et al (2013) Lipopolysaccharide-induced anhedonia is abolished in male serotonin transporter knockout rats: an intracranial self-stimulation study. Brain Behav Immun 29:98–103. doi:10.1016/j.bbi.2012.12.013
Widner B, Laich A, Sperner-Unterweger B, Ledochowski M, Fuchs D (2002) Neopterin production, tryptophan degradation, and mental depression—what is the link? Brain Behav Immun 16:590–595
Walker AK et al (2013) NMDA receptor blockade by ketamine abrogates lipopolysaccharide-induced depressive-like behavior in C57BL/6J mice. Neuropsychopharmacology Off Publ Am Coll Neuropsychopharmacol 38:1609–1616. doi:10.1038/npp.2013.71
Yawata I et al (2008) Macrophage-induced neurotoxicity is mediated by glutamate and attenuated by glutaminase inhibitors and gap junction inhibitors. Life Sci 82:1111–1116. doi:10.1016/j.lfs.2008.03.010
Zhu CB et al (2010) Interleukin-1 receptor activation by systemic lipopolysaccharide induces behavioral despair linked to MAPK regulation of CNS serotonin transporters. Neuropsychopharmacol Off Publ Am Coll Neuropsychopharmacol 35:2510–2520. doi:10.1038/npp.2010.116
Acknowledgments
This work was supported by the University of Texas MD Anderson Cancer Center and grants from the National Institute of Neurological Diseases and Stroke of the National Institutes of Health (Grants R01 NS073939; R01 NS074999). The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.
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Robert Dantzer works as a consultant for Ironwood Pharma.
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Dantzer, R., Walker, A.K. Is there a role for glutamate-mediated excitotoxicity in inflammation-induced depression?. J Neural Transm 121, 925–932 (2014). https://doi.org/10.1007/s00702-014-1187-1
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DOI: https://doi.org/10.1007/s00702-014-1187-1