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Indoleamine 2,3-dioxygenase

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https://www.readbyqxmd.com/read/28650043/heme-containing-enzymes-and-inhibitors-for-tryptophan-metabolism
#1
REVIEW
Daojing Yan, Ying-Wu Lin, Xiangshi Tan
Iron-containing enzymes such as heme enzymes play crucial roles in biological systems. Three distinct heme-containing dioxygenase enzymes, tryptophan 2,3-dioxygenase (TDO), indoleamine 2,3-dioxygenase 1 (IDO1) and indoleamine 2,3-dioxygenase 2 (IDO2) catalyze the initial and rate-limiting step of l-tryptophan catabolism through the kynurenine pathway in mammals. Overexpression of these enzymes causes depletion of tryptophan and the accumulation of metabolic products, which contributes to tumor immune tolerance and immune dysregulation in a variety of disease pathologies...
June 26, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28639129/the-inhibition-of-indoleamine-2-3-dioxygenase-accelerates-early-liver-regeneration-in-mice-after-partial-hepatectomy
#2
Hideyuki Ogiso, Hiroyasu Ito, Ayumu Kanbe, Tatsuya Ando, Akira Hara, Masahito Shimizu, Hisataka Moriwaki, Mitsuru Seishima
BACKGROUND AND AIM: The inflammatory response accelerates early liver regeneration after liver injury and resection. Recent studies have demonstrated that indoleamine 2,3-dioxygenase-1 (IDO1) suppresses the activation of inflammatory cells and induces immune tolerance. In this study, we examined the role of IDO1 in liver regeneration after partial hepatectomy (PHx). METHODS: WT or IDO1-knockout (IDO1-KO) mice received 70% PHx. The liver-body weight ratio after PHx was measured and hepatocyte growth was assessed by immunostaining...
June 21, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28637419/pharmacological-inhibitors-of-nad-biosynthesis-as-potential-anticancer-agents
#3
Stephanie Lucas, Claire Soave, Gazal Nabil, Zainab Ahmed, Guohua Chen, Hossny El-Banna, Q Ping Dou, Jian Wang
BACKGROUND: Alteration of cellular metabolism is a hallmark of cancer, which underlies exciting opportunities to develop effective, anti-cancer therapeutics by targeting through inhibition of cancer metabolism. Nicotinamide adenine dinucleotide (NAD+), an essential coenzyme of energy metabolism and a signaling molecule linking cellular energy status to a spectrum of molecular regulation, has been shown to be in high demand in a variety of cancer cells. Depletion of NAD+ by inhibition of its key biosynthetic enzymes has become an attractive strategy to target cancer...
June 19, 2017: Recent Patents on Anti-cancer Drug Discovery
https://www.readbyqxmd.com/read/28632999/long-noncoding-rna-lnc-sox5-modulates-crc-tumorigenesis-by-unbalancing-tumor-microenvironment
#4
Wu Kaiming, Zhenxian Zhao, Kuanzhi Liu, Jian Zhang, Guanghua Li, Liang Wang
Long non-coding RNAs (LncRNAs) have been recently regarded as systemic regulators in multiple biological processes including tumorigenesis. In this study, we observed the expression of lncRNA lnc-sox5 was significantly increased in colorectal cancer (CRC). Despite the CRC cell growth, cell cycle and cell apoptosis was not affected by lnc-sox5 knock-down, lnc-sox5 knock-down suppressed CRC cell migration and invasion. In addition, xenograft animal model suggested that lnc-sox5 knock-down significantly suppressed the CRC tumorigenesis...
June 20, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28631301/prevention-of-lupus-nephritis-development-in-nzb-nzw-mice-by-selective-blockade-of-cd28
#5
Laetitia Laurent, Awena Lefur, Rozenn Le Bloas, Mélanie Néel, Caroline Mary, Anne Moreau, Nicolas Poirier, Bernard Vanhove, Fadi Fakhouri
Systemic Lupus Erythematosus (SLE) is a chronic systemic inflammatory disease. Autoantibodies (autoAbs) against double-stranded DNA (ds DNA), the hallmark of lupus, are produced and maintained by the interaction between auto-reactive B cells and CD4(+) T cells. This interplay is controlled by the CD28/CD80-86/CTLA-4 axis. Here we investigated whether selective blockade of CD28-CD80/86 co-stimulatory interactions abrogates lupus nephritis development in a murine model of SLE. To this aim, NZB/NZW F1 mice were treated for 3 months, either with an anti-CD28 Fab' fragment or a control Fab'-IgG...
June 20, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28631232/activation-of-brain-indoleamine-2-3-dioxygenase-contributes-to-depressive-like-behavior-induced-by-an-intracerebroventricular-injection-of-streptozotocin-in-mice
#6
Leandro Cattelan Souza, Cristiano R Jesse, Marcelo Gomes de Gomes, Lucian Del Fabbro, André Tiago Rossito Goes, Franciele Donato, Silvana Peterini Boeira
There is a lack of information concerning the molecular events underlying the depressive-like effect of an intracerebroventricular injection of streptozotocin (ICV-STZ) in mice. The elevated activity of the tryptophan-degrading enzyme indoleamine-2,3-dioxygenase (IDO) has been proposed to mediate depression in inflammatory disorders. In the present study, we reported that ICV-STZ activates IDO in the hippocampus of mice and culminates in depressive-like behaviors, as measured by the increased duration of immobility in the tail suspension test and decreased sucrose intake in the sucrose preference test...
June 19, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28623605/cathepsin-c-aggravates-neuroinflammation-involved-in-disturbances-of-behaviour-and-neurochemistry-in-acute-and-chronic-stress-induced-murine-model-of-depression
#7
Yanli Zhang, Kai Fan, Yanna Liu, Gang Liu, Xiaohan Yang, Jianmei Ma
Major depression has been interpreted as an inflammatory disease characterized by cell-mediated immune activation, which is generally triggered by various stresses. Microglia has been thought to be the cellular link between inflammation and depression-like behavioural alterations. The expression of cathepsin C (Cat C), a lysosomal proteinase, is predominantly induced in microglia in neuroinflammation. However, little is known about the role of Cat C in pathophysiology of depression. In the present study, Cat C transgenic mice and wild type mice were subjected to an intraperitoneal injection of LPS (0...
June 16, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28619045/human-adipose-derived-mesenchymal-stem-cells-alleviate-obliterative-bronchiolitis-in-a-murine-model-via-ido
#8
Guoping Zheng, Guanguan Qiu, Menghua Ge, Jianping He, Lanfang Huang, Ping Chen, Wei Wang, Qi Xu, Yaoqin Hu, Qiang Shu, Jianguo Xu
BACKGROUND: Long-term survival of lung transplantation is hindered by the development of obliterative bronchiolitis (OB). Adipose-derived stem cells (ASCs) were documented to have more potent immunosuppressive ability than mesenchymal stem cells (MSCs) from bone marrow and placenta. The goal of our study is to evaluate the effect of repeated administration of ASCs on OB and the involvement of indoleamine 2,3-dioxygenase (IDO) mediating the protective effect of ASCs in a heterotopic tracheal transplantation (HTT) model...
June 15, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28608235/ferulic-acid-supplementation-for-management-of-depression-in-epilepsy
#9
Tanveer Singh, Taranjot Kaur, Rajesh Kumar Goel
Neuroinflammation driven altered neurochemical milieu have been reported to play a significant role in pathogenesis of comorbid depression in epilepsy. Most of the antiepileptic drugs (AEDs) such as levetiracetam, taigabine, topiramate have not been reported any significant effect in alleviating neuroinflammation, which may explain their ineffectiveness in ameliorating depression associated with epilepsy. The supplementation of antidepressants (ADs) attracts various pharmacokinetic and pharmacodynamic interactions with AEDs and was considered unsafe in epilepsy...
June 12, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28607543/modulation-of-tryptophan-serotonin-pathway-by-probiotic-supplementation-in-human-immunodeficiency-virus-positive-patients-preliminary-results-of-a-new-study-approach
#10
Giuseppe Corano Scheri, Saeid Najafi Fard, Ivan Schietroma, Andrea Mastrangelo, Claudia Pinacchio, Noemi Giustini, Sara Serafino, Gabriella De Girolamo, Eugenio Nelson Cavallari, Maura Statzu, Luca Laghi, Annamaria Vullo, Giancarlo Ceccarelli, Vincenzo Vullo, Gabriella d'Ettorre
BACKGROUND: To date, no data are available regarding the effects of probiotics on the pathway of tryptophan/serotonin metabolism among human immunodeficiency virus (HIV) 1-infected individuals. Because a condition of dysbiosis might be responsible for the altered use of tryptophan described in this population, the aim of this study was to investigate the link between probiotic supplementation and serotonin levels in combined antiretroviral therapy-treated patients and the subsistence of an interplay with inflammation...
2017: International Journal of Tryptophan Research: IJTR
https://www.readbyqxmd.com/read/28604143/combinatorial-antitumor-effects-of-indoleamine-2-3-dioxygenase-inhibitor-nlg919-and-paclitaxel-in-a-murine-b16-f10-melanoma-model
#11
Xiangjing Meng, Guangying Du, Liang Ye, Shanyue Sun, Qiaofeng Liu, Hongbo Wang, Wenyan Wang, Zimei Wu, Jingwei Tian
Indoleamine 2,3-dioxygenase (IDO) is involved in tumor immune escape and resistance to chemotherapy, and is clinically correlated with tumor progression. IDO inhibitors show marginal efficacy as single agents; therefore, combinations of these inhibitors with other therapies hold promise for cancer therapy. The aim of this study was to investigate the synergistic antitumor effects of IDO inhibitor NLG919 in combination with different regimens of paclitaxel in a murine B16-F10 melanoma model. NLG919 increased the cytotoxic activity of paclitaxel toward B16-F10 cells in the presence of pretreatment with interferon (IFN)-γ in vitro...
June 1, 2017: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/28599322/monoamine-oxidase-a-upregulated-by-chronic-intermittent-hypoxia-activates-indoleamine-2-3-dioxygenase-and-neurodegeneration
#12
Chun-Sing Lam, Jing-Jie Li, George Lim Tipoe, Moussa B H Youdim, Man-Lung Fung
Co-morbid depression is prevalent in patients with obstructive sleep apnea. Here we report that monoamine oxidase A (MAO-A) plays pathogenic roles in the comorbidity. We found that chronic intermittent hypoxia significantly increased the MAO-A expression in the rat hippocampus and markedly decreased the dendritic length and spine density in the pyramidal neurons with less pre- and post-synaptic proteins. The MAO-A upregulation resulted in increased 5-hydroxyindoleacetic acid/serotonin ratio, oxidative stress, leading to NF-κB activation, inflammation and apoptosis...
2017: PloS One
https://www.readbyqxmd.com/read/28595944/ido-chronic-immune-activation-and-tryptophan-metabolic-pathway-a-potential-pathophysiological-link-between-depression-and-obesity
#13
REVIEW
Adriano José Maia Chaves Filho, Camila Nayane Carvalho Lima, Silvânia Maria Mendes Vasconcelos, David Freitas de Lucena, Michael Maes, Danielle Macedo
Obesity and depression are among the most pressing health problems in the contemporary world. Obesity and depression share a bidirectional relationship, whereby each condition increases the risk of the other. By inference, shared pathways may underpin the comorbidity between obesity and depression. Activation of cell-mediated immunity (CMI) is a key factor in the pathophysiology of depression. CMI cytokines, including IFN-γ, TNFα and IL-1β, induce the catabolism of tryptophan (TRY) by stimulating indoleamine 2,3-dioxygenase (IDO) resulting in the synthesis of kynurenine (KYN) and other tryptophan catabolites (TRYCATs)...
June 5, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28590049/chromatographic-analysis-of-tryptophan-metabolites
#14
REVIEW
Ilona Sadok, Andrzej Gamian, Magdalena Maria Staniszewska
The kynurenine pathway generates multiple tryptophan metabolites called collectively kynurenines and leads to formation of the enzyme co-factor NAD. The first step in this pathway is tryptophan degradation, initiated by the rate-limiting enzymes indoleamine 2,3-dioxygenase or tryptophan 2,3-dioxygenase, depending on the tissue. The balanced kynurenine metabolism, which has been a subject of multiple studies in last decades, plays an important role in several physiological and pathological conditions such as infections, autoimmunity, neurological disorders, cancer, cataracts, as well as pregnancy...
June 7, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28585214/the-interactions-between-kynurenine-folate-methionine-and-pteridine-pathways-in-obesity
#15
Ayse Basak Engin, Atilla Engin
Obesity activates both innate and adaptive immune responses in adipose tissue. Elevated levels of eosinophils with depression of monocyte and neutrophil indicate the deficiencies in the immune system of morbidly obese individuals. Actually, adipose tissue macrophages are functional antigen-presenting cells that promote the proliferation of interferon-gamma (IFN-gamma)-producing CD4+ T cells in adipose tissue of obese subjects. Eventually, diet-induced obesity is associated with the loss of tissue homeostasis and development of type 1 inflammatory responses in visceral adipose tissue...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28581352/interferon-%C3%AE-mediates-the-immunosuppression-of-bone-marrow-mesenchymal-stem-cells-on-t-lymphocytes-in-vitro
#16
Chen Liang, Erlie Jiang, Jianfeng Yao, Mei Wang, Shulian Chen, Zheng Zhou, Weihua Zhai, Qiaoling Ma, Sizhou Feng, Mingzhe Han
OBJECTIVES: In the present study, we first confirmed the suppressive function of MSCs in allogeneic T cell proliferation and then examined the underlying mechanisms for MSCs' immunomodulation and the role of the pro-inflammatory cytokine interferon (IFN)-γ. METHODS: Human MSCs were cultured in the presence or absence of IFN-γ. The expression level of prostaglandin E2 (PGE2), hepatocyte growth factor (HGF), transforming growth factor (TGF)-β1 and indoleamine 2,3-dioxygenase (IDO) by MSCs were measured...
June 5, 2017: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/28570965/neurochemical-evidence-based-suggested-therapy-for-safe-management-of-epileptogenesis
#17
Navjot Kaur, Tanveer Singh, Sandeep Kumar, Rajesh Kumar Goel
Most of the clinically available antiepileptic drugs have only antiseizure effects and are reported unable to prevent epileptogenesis. In the past decade, several drugs underwent clinical trials for management of epileptogenesis, but none of the drugs tested was found effective. One of the major lacunas is availability of appropriate preclinical approaches to delineate mechanisms of epileptogenesis. Thus, the present study attempts to suggest a neurochemistry based approach for safe management of epileptogenesis...
May 29, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28566947/immunological-aspects-of-the-treatment-of-depression-and-schizophrenia
#18
Norbert Müller
Schizophrenia and major depression (MD) have been associated with immune system dysfunction. One example of this is the altered level of cytokines-important inflammatory mediators-in blood, and a proinflammatory immune state has been described in some subgroups of patients. A knock to the immune system in early life might trigger a life-long increased immune reactivity, and infections and autoimmune disorders are now known to be risk factors for development of schizophrenia and MD. Pro- and anti-inflammatory cytokines mediate indoleamine 2,3-dioxygenase activity; this enzyme drives metabolism of tryptophan and kynurenin in the central nervous system and degrades serotonin...
March 2017: Dialogues in Clinical Neuroscience
https://www.readbyqxmd.com/read/28551624/immunoregulatory-function-of-lymphatic-endothelial-cells-in-tumor-draining-lymph-nodes-of-human-gastric-cancer
#19
Mao Tokumoto, Hiroaki Tanaka, Yukie Tauchi, Tatsuro Tamura, Takahiro Toyokawa, Kenjiro Kimura, Kazuya Muguruma, Masakazu Yashiro, Kiyoshi Maeda, Kosei Hirakawa, Masaichi Ohira
BACKGROUND/AIM: Lymph node metastasis is the most important prognostic factor for patients with gastric cancer. Increasing evidence suggests that lymphatic endothelial cells (LECs) regulate immune responses. The aim of this study was to examine the effect of LECs on the activation of CD4(+) T cells. MATERIALS AND METHODS: We examined the impact of cancer cells on the phenotype and production of cytokines of LECs derived from tumor-draining lymph nodes. RESULTS: We showed that LECs inhibited CD4(+) T cell production of cytokines, such as IL-2, IL-10, and INF-γ...
June 2017: Anticancer Research
https://www.readbyqxmd.com/read/28545736/amino-acid-sensing-and-degrading-pathways-in-immune-regulation
#20
Ursula Grohmann, Giada Mondanelli, Maria L Belladonna, Ciriana Orabona, Maria T Pallotta, Alberta Iacono, Paolo Puccetti, Claudia Volpi
Indoleamine 2,3-dioxygenases (IDOs) - belonging in the heme dioxygenase family and degrading tryptophan - are responsible for the de novo synthesis of nicotinamide adenine dinucleotide (NAD(+)). As such, they are expressed by a variety of invertebrate and vertebrate species. In mammals, IDO1 has remarkably evolved to expand its functions, so to become a prominent homeostatic regulator, capable of modulating infection and immunity in multiple ways, including local tryptophan deprivation, production of biologically active tryptophan catabolites, and non-enzymatic cell-signaling activity...
May 18, 2017: Cytokine & Growth Factor Reviews
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