2015
DOI: 10.3390/vaccines3030703
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The Role of Indoleamine 2, 3-Dioxygenase in Immune Suppression and Autoimmunity

Abstract: Indoleamine 2, 3-dioxygenase (IDO) is the first and rate limiting catabolic enzyme in the degradation pathway of the essential amino acid tryptophan. By cleaving the aromatic indole ring of tryptophan, IDO initiates the production of a variety of tryptophan degradation products called “kynurenines” that are known to exert important immuno-regulatory functions. Because tryptophan must be supplied in the diet, regulation of tryptophan catabolism may exert profound effects by activating or inhibiting metabolism a… Show more

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Cited by 290 publications
(258 citation statements)
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“…Not all immune checkpoint or immunomodulatory molecules take the form of a receptor or ligand. Some may be expressed by the cell in a free soluble form, such as indoleamine 2,3-dioxygenase (IDO1), an enzyme produced by some activated macrophages and also overexpressed by many tumors [94] . The enzyme depletes tryptophan in the microenvironment, with production of the catabolite kynurenine, which harms the cytotoxic T-cells.…”
Section: Antibodies To Immune Checkpoint Moleculesmentioning
confidence: 99%
“…Not all immune checkpoint or immunomodulatory molecules take the form of a receptor or ligand. Some may be expressed by the cell in a free soluble form, such as indoleamine 2,3-dioxygenase (IDO1), an enzyme produced by some activated macrophages and also overexpressed by many tumors [94] . The enzyme depletes tryptophan in the microenvironment, with production of the catabolite kynurenine, which harms the cytotoxic T-cells.…”
Section: Antibodies To Immune Checkpoint Moleculesmentioning
confidence: 99%
“…IDO is the first and rate-limiting enzyme in the pathway that degrades the essential amino acid tryptophan to kynurenine (27). The function of IDO has been best characterized in tumor immunology.…”
Section: Discussionmentioning
confidence: 99%
“…Стимуляция через TLR3 и TLR4 индуцирует экспрессию IDO в ДК, а сти-муляция через TLR7/8 -в моноцитах. Лигация TLR3/4 через канонический путь стимуляции NF-kB с участием фактора транскрипции IRF3 (interferon regulatory factor) индуцирует синтез TNFα и IFNβ, которые в дальнейшем и стиму-лируют экспрессию IDO [40]. При этом TNFα на уровне экспрессии гена IDO оказывает сти-мулирующий эффект на индуцирующее влияние IFNγ [62].…”
Section: немного про Indoleamine-23-dioxygenase (Ido)unclassified
“…IDO1 и IDO2. Гены послед-них двух ферментов располагаются тандемом на хромосоме 8р21, являясь структурно и эво-люционно родственными белками [40]. Впер-вые антипролиферативный эффект IDO (42kD мономерный протеин) в отношении бактерий, простейших и опухолевых клеток был описан в 1984 г.…”
unclassified