Tryptophan-2,3-Dioxygenase (TDO) deficiency is associated with subclinical neuroprotection in a mouse model of multiple sclerosis
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Tryptophan-2,3-Dioxygenase (TDO) deficiency is associated with subclinical neuroprotection in a mouse model of multiple sclerosis. / Lanz, Tobias V; Williams, Sarah K; Stojic, Aleksandar; Iwantscheff, Simeon; Sonner, Jana K; Grabitz, Carl; Becker, Simon; Böhler, Laura-Inés; Mohapatra, Soumya R; Sahm, Felix; Küblbeck, Günter; Nakamura, Toshikazu; Funakoshi, Hiroshi; Opitz, Christiane A; Wick, Wolfgang; Diem, Ricarda; Platten, Michael.
In: SCI REP-UK, Vol. 7, 24.01.2017, p. 41271.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Tryptophan-2,3-Dioxygenase (TDO) deficiency is associated with subclinical neuroprotection in a mouse model of multiple sclerosis
AU - Lanz, Tobias V
AU - Williams, Sarah K
AU - Stojic, Aleksandar
AU - Iwantscheff, Simeon
AU - Sonner, Jana K
AU - Grabitz, Carl
AU - Becker, Simon
AU - Böhler, Laura-Inés
AU - Mohapatra, Soumya R
AU - Sahm, Felix
AU - Küblbeck, Günter
AU - Nakamura, Toshikazu
AU - Funakoshi, Hiroshi
AU - Opitz, Christiane A
AU - Wick, Wolfgang
AU - Diem, Ricarda
AU - Platten, Michael
PY - 2017/1/24
Y1 - 2017/1/24
N2 - The catabolism of tryptophan to immunosuppressive and neuroactive kynurenines is a key metabolic pathway regulating immune responses and neurotoxicity. The rate-limiting step is controlled by indoleamine-2,3-dioxygenase (IDO) and tryptophan-2,3-dioxygenase (TDO). IDO is expressed in antigen presenting cells during immune reactions, hepatic TDO regulates blood homeostasis of tryptophan and neuronal TDO influences neurogenesis. While the role of IDO has been described in multiple immunological settings, little is known about TDO's effects on the immune system. TDO-deficiency is neuroprotective in C. elegans and Drosophila by increasing tryptophan and specific kynurenines. Here we have determined the role of TDO in autoimmunity and neurodegeneration in experimental autoimmune encephalomyelitis (EAE), a model of multiple sclerosis. We created reporter-TDO mice for in vivo imaging to show that hepatic but not CNS TDO expression is activated during EAE. TDO deficiency did not influence myelin-specific T cells, leukocyte infiltration into the CNS, demyelination and disease activity. TDO-deficiency protected from neuronal loss in the spinal cord but not in the optic nerves. While this protection did not translate to an improved overt clinical outcome, our data suggest that spatially distinct neuroprotection is conserved in mammals and support TDO as a potential target for treatment of diseases associated with neurodegeneration.
AB - The catabolism of tryptophan to immunosuppressive and neuroactive kynurenines is a key metabolic pathway regulating immune responses and neurotoxicity. The rate-limiting step is controlled by indoleamine-2,3-dioxygenase (IDO) and tryptophan-2,3-dioxygenase (TDO). IDO is expressed in antigen presenting cells during immune reactions, hepatic TDO regulates blood homeostasis of tryptophan and neuronal TDO influences neurogenesis. While the role of IDO has been described in multiple immunological settings, little is known about TDO's effects on the immune system. TDO-deficiency is neuroprotective in C. elegans and Drosophila by increasing tryptophan and specific kynurenines. Here we have determined the role of TDO in autoimmunity and neurodegeneration in experimental autoimmune encephalomyelitis (EAE), a model of multiple sclerosis. We created reporter-TDO mice for in vivo imaging to show that hepatic but not CNS TDO expression is activated during EAE. TDO deficiency did not influence myelin-specific T cells, leukocyte infiltration into the CNS, demyelination and disease activity. TDO-deficiency protected from neuronal loss in the spinal cord but not in the optic nerves. While this protection did not translate to an improved overt clinical outcome, our data suggest that spatially distinct neuroprotection is conserved in mammals and support TDO as a potential target for treatment of diseases associated with neurodegeneration.
KW - Animals
KW - Cell Differentiation
KW - Cell Survival
KW - Cloning, Molecular
KW - Disease Models, Animal
KW - Encephalomyelitis, Autoimmune, Experimental/enzymology
KW - Genes, Reporter
KW - Inflammation/pathology
KW - Liver/enzymology
KW - Lymphocyte Activation
KW - Mice, Inbred C57BL
KW - Mice, Transgenic
KW - Multiple Sclerosis/enzymology
KW - Neuroglia/metabolism
KW - Neurons/metabolism
KW - Neuroprotection
KW - Phenotype
KW - T-Lymphocytes/immunology
KW - Tryptophan Oxygenase/deficiency
U2 - 10.1038/srep41271
DO - 10.1038/srep41271
M3 - SCORING: Journal article
C2 - 28117398
VL - 7
SP - 41271
JO - SCI REP-UK
JF - SCI REP-UK
SN - 2045-2322
ER -