Abstract
There are circumferential evidences that major depression is associated with mild pro-inflammatory state. Both physiological and psychological stress can induce increased production of pro-inflammatory mediators, reactive oxygen species (ROS) and hypothalamo–hypophyseal–adrenal axis disturbances. While both pro-inflammatory mediators and ROS could activate the tryptophan breakdown and kynurenine pathway with a shift toward the neurotoxic arm, chronic hypercortisolism could also enhance tryptophan breakdown and induce neurodegenerative changes. The imbalanced kynurenine metabolism in terms of neuroprotective and neurotoxic effects was demonstrated in major depression, and in drug-induced neuropsychiatric side effects, such as interferon-treated depression. The changes in periphery are shown to be associated with central changes. Those changes might be partly contributed by genetic factors. While some of the currently available antidepressants could reverse the pro-inflammatory state of the depressed patients, these medications could not efficiently improve those metabolic and neurochemical changes within the period that could induce clinical improvement. In this review, the role of kynurenine metabolism which interacts with other neurochemicals is discussed as a major contributing pathophysiological mechanism in major depression. Moreover, the future therapeutic opportunities are also discussed in this review.
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Alonso J, Angermeyer MC, Bernert S, Bruffaerts R, Brugha TS, Bryson H et al (2004) Prevalence of mental disorders in Europe: results from the European Study of the Epidemiology of Mental Disorders (ESEMeD) project. Acta Psychiatr Scand Suppl 21–27
Anisman H, Ravindran AV, Griffiths J, Merali Z (1999) Endocrine and cytokine correlates of major depression and dysthymia with typical or atypical features. Mol Psychiatry 4:182–188
Bender DA (1989) Effects of a dietary excess of leucine and of the addition of leucine and 2-oxo-isocaproate on the metabolism of tryptophan and niacin in isolated rat liver cells. Br J Nutr 61:629–640
Bender DA, McCreanor GM (1985) Kynurenine hydroxylase: a potential rate-limiting enzyme in tryptophan metabolism. Biochem Soc Trans 13:441–443
Campuzano O, Castillo-Ruiz MM, Acarin L, Castellano B, Gonzalez B (2008) Distinct pattern of microglial response, cyclooxygenase-2, and inducible nitric oxide synthase expression in the aged rat brain after excitotoxic damage. J Neurosci Res 86:3170–3183
Carlin JM, Borden EC, Sondel PM, Byrne GI (1987) Biologic-response-modifier-induced indoleamine 2, 3-dioxygenase activity in human peripheral blood mononuclear cell cultures. J Immunol 139:2414–2418
Chen S, Averett NT, Manelli A, Ladu MJ, May W, Ard MD (2005) Isoform-specific effects of apolipoprotein E on secretion of inflammatory mediators in adult rat microglia. J Alzheimers Dis 7:25–35
Chiarugi A, Calvani M, Meli E, Traggiai E, Moroni F (2001) Synthesis and release of neurotoxic kynurenine metabolites by human monocyte-derived macrophages. J Neuroimmunol 120:190–198
Connor TJ, Leonard BE (1998) Depression, stress and immunological activation: the role of cytokines in depressive disorders. Life Sci 62:583–606
Depboylu C, Weihe E, Eiden LE (2011) COX1 and COX2 expression in non-neuronal cellular compartments of the rhesus macaque brain during lentiviral infection. Neurobiol Dis 42:108–115
Evans DL, Pedersen CA, Folds JD (1988) Major depression and immunity: preliminary evidence of decreased natural killer cell populations. Prog Neuropsychopharmacol Biol Psychiatry 12:739–748
Eynard N, Flachaire E, Lestra C, Broyer M, Zaidan R, Claustrat B et al (1993) Platelet serotonin content and free and total plasma tryptophan in healthy volunteers during 24 hours. Clin Chem 39:2337–2340
Fernstrom JD (1977) Effects on the diet on brain neurotransmitters. Metabolism 26:207–223
Gabbay V, Liebes L, Katz Y, Liu S, Mendoza S, Babb JS et al (2010) The kynurenine pathway in adolescent depression: preliminary findings from a proton MR spectroscopy study. Prog Neuropsychopharmacol Biol Psychiatry 34:37–44
Gal EM, Sherman AD (1980) l-Kynurenine: its synthesis and possible regulatory function in brain. Neurochem Res 5:223–239
Grant RS, Kapoor V (1998) Murine glial cells regenerate NAD, after peroxide-induced depletion, using either nicotinic acid, nicotinamide, or quinolinic acid as substrates. J Neurochem 70:1759–1763
Grant RS, Naif H, Espinosa M, Kapoor V (2000) IDO induction in IFN-gamma activated astroglia: a role in improving cell viability during oxidative stress. Redox Rep 5:101–104
Guillemin GJ, Smith DG, Kerr SJ, Smythe GA, Kapoor V, Armati PJ et al (2000) Characterisation of kynurenine pathway metabolism in human astrocytes and implications in neuropathogenesis. Redox Rep 5:108–111
Guillemin GJ, Kerr SJ, Smythe GA, Smith DG, Kapoor V, Armati PJ et al (2001) Kynurenine pathway metabolism in human astrocytes: a paradox for neuronal protection. J Neurochem 78:842–853
Guillemin GJ, Smythe G, Takikawa O, Brew BJ (2005) Expression of indoleamine 2,3-dioxygenase and production of quinolinic acid by human microglia, astrocytes, and neurons. Glia 49:15–23
Heyes MP, Saito K, Crowley JS, Davis LE, Demitrack MA, Der M et al (1992) Quinolinic acid and kynurenine pathway metabolism in inflammatory and non-inflammatory neurological disease. Brain 115:1249–1273
Heyes MP, Saito K, Major EO, Milstien S, Markey SP, Vickers JH (1993) A mechanism of quinolinic acid formation by brain in inflammatory neurological disease. Attenuation of synthesis from l-tryptophan by 6-chlorotryptophan and 4-chloro-3-hydroxyanthranilate. Brain 116:1425–1450
Heyes MP, Achim CL, Wiley CA, Major EO, Saito K, Markey SP (1996) Human microglia convert l-tryptophan into the neurotoxin quinolinic acid. Biochem J 320:595–597
Hilmas C, Pereira EF, Alkondon M, Rassoulpour A, Schwarcz R, Albuquerque EX (2001) The brain metabolite kynurenic acid inhibits alpha7 nicotinic receptor activity and increases non-alpha7 nicotinic receptor expression: physiopathological implications. J Neurosci 21:7463–7473
Hosoda S, Takimura H, Shibayama M, Kanamura H, Ikeda K, Kumada H (2000) Psychiatric symptoms related to interferon therapy for chronic hepatitis C: clinical features and prognosis. Psychiatry Clin Neurosci 54:565–572
Irwin M, Smith TL, Gillin JC (1987) Low natural killer cytotoxicity in major depression. Life Sci 41:2127–2133
Kaestner F, Hettich M, Peters M, Sibrowski W, Hetzel G, Ponath G et al (2005) Different activation patterns of proinflammatory cytokines in melancholic and non-melancholic major depression are associated with HPA axis activity. J Affect Disord 87:305–311
Kim JP, Choi DW (1987) Quinolinate neurotoxicity in cortical cell culture. Neuroscience 23:423–432
Kim YK, Suh IB, Kim H, Han CS, Lim CS, Choi SH et al (2002) The plasma levels of interleukin-12 in schizophrenia, major depression, and bipolar mania: effects of psychotropic drugs. Mol Psychiatry 7:1107–1114
Knox WE (1951) Two mechanisms which increase in vivo the liver tryptophan peroxidase activity: specific enzyme adaptation and stimulation of the pituitary adrenal system. Br J Exp Pathol 32:462–469
Lanquillon S, Krieg JC, Bening-Abu-Shach U, Vedder H (2000) Cytokine production and treatment response in major depressive disorder. Neuropsychopharmacology 22:370–379
Lapin IP, Oxenkrug GF (1969) Intensification of the central serotoninergic processes as a possible determinant of the thymoleptic effect. Lancet 1:132–136
Leklem JE (1971) Quantitative aspects of tryptophan metabolism in humans and other species: a review. Am J Clin Nutr 24:659–672
Maes M (1994) Cytokines in major depression. Biol Psychiatry 36:498–499 (letter; comment)
Maes M, Lambrechts J, Bosmans E, Jacobs J, Suy E, Vandervorst C et al (1992a) Evidence for a systemic immune activation during depression: results of leukocyte enumeration by flow cytometry in conjunction with monoclonal antibody staining. Psychol Med 22:45–53
Maes M, Stevens W, DeClerck L, Bridts C, Peeters D, Schotte C et al (1992b) Immune disorders in depression: higher T helper/T suppressor-cytotoxic cell ratio. Acta Psychiatr Scand 86:423–431
Maes M, Song C, Lin AH, Bonaccorso S, Kenis G, de Jongh R et al (1999) Negative immunoregulatory effects of antidepressants: inhibition of interferon-gamma and stimulation of interleukin-10 secretion. Neuropsychopharmacology 20:370–379
Mangoni A (1974) The “kynurenine shunt” and depression. Adv Biochem Psychopharmacol 11:293–298
Mathers C, Loncar D (2005) Updated projection of global mortality and burden of disease, 2002–2030: data sources, methods and results. WHO, Geneva
Mellor AL, Munn DH (1999) Tryptophan catabolism and T-cell tolerance: immunosuppression by starvation? Immunol Today 20:469–473
Mikova O, Yakimova R, Bosmans E, Kenis G, Maes M (2001) Increased serum tumor necrosis factor alpha concentrations in major depression and multiple sclerosis. Eur Neuropsychopharmacol 11:203–208
Miller CL, Llenos IC, Dulay JR, Barillo MM, Yolken RH, Weis S (2004) Expression of the kynurenine pathway enzyme tryptophan 2,3-dioxygenase is increased in the frontal cortex of individuals with schizophrenia. Neurobiol Dis 15:618–629
Moffett JR, Namboodiri MA (2003) Tryptophan and the immune response. Immunol Cell Biol 81:247–265
Moffett JR, Blinder KL, Venkateshan CN, Namboodiri MA (1998) Differential effects of kynurenine and tryptophan treatment on quinolinate immunoreactivity in rat lymphoid and non-lymphoid organs. Cell Tissue Res 293:525–534
Müller N, Schwarz MJ, Dehning S, Douhet A, Cerovecki A, Goldstein-Müller B et al (2006) The cyclooxygenase-2 inhibitor celecoxib has therapeutic effects in major depression: results of a double-blind, randomized, placebo controlled, add-on pilot study to reboxetine. Mol Psychiatry 11:680–684
Musso T, Gusella GL, Brooks A, Longo DL, Varesio L (1994) Interleukin-4 inhibits indoleamine 2,3-dioxygenase expression in human monocytes. Blood 83:1408–1411
Myint AM, Kim YK (2003) Cytokine-serotonin interaction through IDO: a neurodegeneration hypothesis of depression. Med Hypotheses 61:519–525
Myint AM, Leonard BE, Steinbusch HW, Kim YK (2005) Th1, Th2, and Th3 cytokine alterations in major depression. J Affect Disord 88:167–173
Myint AM, Kim YK, Verkerk R, Scharpe S, Steinbusch H, Leonard B (2007) Kynurenine pathway in major depression: evidence of impaired neuroprotection. J Affect Disord 98:143–151
Okuda S, Nishiyama N, Saito H, Katsuki H (1998) 3-Hydroxykynurenine, an endogenous oxidative stress generator, causes neuronal cell death with apoptotic features and region selectivity. J Neurochem 70:299–307
Perkins MN, Stone TW (1982) An iontophoretic investigation of the actions of convulsant kynurenines and their interaction with the endogenous excitant quinolinic acid. Brain Res 247:184–187
Pertz H, Back W (1988) Synthesis and resolution of chiral ring-opened serotonin analogs of the 5-hydroxykynuramine type. Pharm Acta Helv 63:128–131
Pocivavsek A, Wu HQ, Potter MC, Elmer GI, Pellicciari R, Schwarcz R (2011) Fluctuations in endogenous kynurenic acid control hippocampal glutamate and memory. Neuropsychopharmacology 36:2357–2367
Raison CL, Dantzer R, Kelley KW, Lawson MA, Woolwine BJ, Vogt G 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
Rajkowska G, Miguel-Hidalgo JJ, Wei J, Dilley G, Pittman SD, Meltzer HY et al (1999) Morphometric evidence for neuronal and glial prefrontal cell pathology in major depression. Biol Psychiatry 45:1085–1098
Salter M, Pogson CI (1985) The role of tryptophan 2,3-dioxygenase in the hormonal control of tryptophan metabolism in isolated rat liver cells. Effects of glucocorticoids and experimental diabetes. Biochem J 229:499–504
Schiepers OJ, Wichers MC, Maes M (2005) Cytokines and major depression. Prog Neuropsychopharmacol Biol Psychiatry 29:201–217
Schwarcz R, Whetsell WO Jr, Mangano RM (1983) Quinolinic acid: an endogenous metabolite that produces axon-sparing lesions in rat brain. Science 219:316–318
Sluzewska A, Rybakowski JK, Laciak M, Mackiewicz A, Sobieska M, Wiktorowicz K (1995) Interleukin-6 serum levels in depressed patients before and after treatment with fluoxetine. Ann N Y Acad Sci 762:474–476
Sluzewska A, Rybakowski J, Bosmans E, Sobieska M, Berghmans R, Maes M et al (1996) Indicators of immune activation in major depression. Psychiatry Res 64:161–167
Smith RS (1991) The macrophage theory of depression. Med Hypotheses 35:298–306
Steiner J, Bielau H, Brisch R, Danos P, Ullrich O, Mawrin C et al (2008) Immunological aspects in the neurobiology of suicide: elevated microglial density in schizophrenia and depression is associated with suicide. J Psychiatr Res 42:151–157
Thomas AJ, Davis S, Morris C, Jackson E, Harrison R, O’Brien JT (2005) Increase in interleukin-1beta in late-life depression. Am J Psychiatry 162:175–177
Watanabe Y, Fujiwara M, Yoshida R, Hayaishi O (1980) Stereospecificity of hepatic l-tryptophan 2,3-dioxygenase. Biochem J 189:393–405
Wichers MC, Koek GH, Robaeys G, Verkerk R, Scharpe S, Maes M (2005) IDO and interferon-alpha-induced depressive symptoms: a shift in hypothesis from tryptophan depletion to neurotoxicity. Mol Psychiatry 10:538–544
Yasui H, Takai K, Yoshida R, Hayaishi O (1986) Interferon enhances tryptophan metabolism by inducing pulmonary indoleamine 2,3-dioxygenase: its possible occurrence in cancer patients. Proc Natl Acad Sci USA 83:6622–6626
Yuwiler A, Oldendorf WH, Geller E, Braun L (1977) Effect of albumin binding and amino acid competition on tryptophan uptake into brain. J Neurochem 28:1015–1023
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The work of the authors is partly funded by European Collaborative Research Project MOODINFLAME.
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Myint, AM., Schwarz, M.J. & Müller, N. The role of the kynurenine metabolism in major depression. J Neural Transm 119, 245–251 (2012). https://doi.org/10.1007/s00702-011-0741-3
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DOI: https://doi.org/10.1007/s00702-011-0741-3