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Zhang J, Liu Y, Zhi X, Xu L, Tao J, Cui D, Liu TF. Tryptophan catabolism via the kynurenine pathway regulates infection and inflammation: from mechanisms to biomarkers and therapies. Inflamm Res 2024; 73:979-996. [PMID: 38592457 DOI: 10.1007/s00011-024-01878-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/24/2024] [Accepted: 03/27/2024] [Indexed: 04/10/2024] Open
Abstract
BACKGROUND L-Tryptophan (L-Trp), an essential amino acid, is the only amino acid whose level is regulated specifically by immune signals. Most proportions of Trp are catabolized via the kynurenine (Kyn) pathway (KP) which has evolved to align the food availability and environmental stimulation with the host pathophysiology and behavior. Especially, the KP plays an indispensable role in balancing the immune activation and tolerance in response to pathogens. SCOPE OF REVIEW In this review, we elucidate the underlying immunological regulatory network of Trp and its KP-dependent catabolites in the pathophysiological conditions by participating in multiple signaling pathways. Furthermore, the KP-based regulatory roles, biomarkers, and therapeutic strategies in pathologically immune disorders are summarized covering from acute to chronic infection and inflammation. MAJOR CONCLUSIONS The immunosuppressive effects dominate the functions of KP induced-Trp depletion and KP-produced metabolites during infection and inflammation. However, the extending minor branches from the KP are not confined to the immune tolerance, instead they go forward to various functions according to the specific condition. Nevertheless, persistent efforts should be made before the clinical use of KP-based strategies to monitor and cure infectious and inflammatory diseases.
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Affiliation(s)
- Jingpu Zhang
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Highway, Shanghai, 201508, People's Republic of China.
| | - Yanlei Liu
- Institute of Nano Biomedicine and Engineering, Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic of China
| | - Xiao Zhi
- Shanghai Institute of Virology, Shanghai Jiao Tong University School of Medicine, 227 South Chongqing Road, Shanghai, 200025, People's Republic of China
| | - Li Xu
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Highway, Shanghai, 201508, People's Republic of China
| | - Jie Tao
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Highway, Shanghai, 201508, People's Republic of China
| | - Daxiang Cui
- Institute of Nano Biomedicine and Engineering, Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic of China
| | - Tie Fu Liu
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Highway, Shanghai, 201508, People's Republic of China.
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Yuasa HJ. Unusual Evolution of Cephalopod Tryptophan Indole-Lyases. J Mol Evol 2023; 91:912-921. [PMID: 38007709 DOI: 10.1007/s00239-023-10144-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 11/07/2023] [Indexed: 11/28/2023]
Abstract
Tryptophan indole-lyase (TIL), a pyridoxal-5-phosphate-dependent enzyme, catalyzes the hydrolysis of L-tryptophan (L-Trp) to indole and ammonium pyruvate. TIL is widely distributed among bacteria and bacterial TILs consist of a D2-symmetric homotetramer. On the other hand, TIL genes are also present in several metazoans. Cephalopods have two TILs, TILα and TILβ, which are believed to be derived from a gene duplication that occurred before octopus and squid diverged. However, both TILα and TILβ individually contain disruptive amino acid substitutions for TIL activity, and neither was active when expressed alone. When TILα and TILβ were coexpressed, however, they formed a heterotetramer that exhibited low TIL activity. The loss of TIL activity of the heterotetramer following site-directed mutagenesis strongly suggests that the active heterotetramer contains the TILα/TILβ heterodimer. Metazoan TILs generally have lower kcat values for L-Trp than those of bacterial TILs, but such low TIL activity may be rather suitable for metazoan physiology, where L-Trp is in high demand. Therefore, reduced activity may have been a less likely target for purifying selection in the evolution of cephalopod TILs. Meanwhile, the unusual evolution of cephalopod TILs may indicate the difficulty of post-gene duplication evolution of enzymes with catalytic sites contributed by multiple subunits, such as TIL.
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Affiliation(s)
- Hajime Julie Yuasa
- Laboratory of Biochemistry, Department of Chemistry and Biotechnology, Faculty of Science and Technology, National University Corporation Kochi University, Kochi, 780-8520, Japan.
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3
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Suvieri C, De Marchis F, Mandarano M, Ambrosino S, Rossini S, Mondanelli G, Gargaro M, Panfili E, Orabona C, Pallotta MT, Belladonna ML, Volpi C. Membrane Localization and Phosphorylation of Indoleamine 2,3-Dioxygenase 2 (IDO2) in A549 Human Lung Adenocarcinoma Cells: First Steps in Exploring Its Signaling Function. Int J Mol Sci 2023; 24:16236. [PMID: 38003426 PMCID: PMC10671178 DOI: 10.3390/ijms242216236] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 11/05/2023] [Accepted: 11/10/2023] [Indexed: 11/26/2023] Open
Abstract
Indoleamine 2,3-dioxygenase 2 (IDO2) is a paralog of Indoleamine 2,3-dioxygenase 1 (IDO1), a tryptophan-degrading enzyme producing immunomodulatory molecules. However, the two proteins are unlikely to carry out the same functions. IDO2 shows little or no tryptophan catabolic activity and exerts contrasting immunomodulatory roles in a context-dependent manner in cancer and autoimmune diseases. The recently described potential non-enzymatic activity of IDO2 has suggested its possible involvement in alternative pathways, resulting in either pro- or anti-inflammatory effects in different models. In a previous study on non-small cell lung cancer (NSCLC) tissues, we found that IDO2 expression revealed at the plasma membrane level of tumor cells was significantly associated with poor prognosis. In this study, the A549 human cell line, basally expressing IDO2, was used as an in vitro model of human lung adenocarcinoma to gain more insights into a possible alternative function of IDO2 different from the catalytic one. In these cells, immunocytochemistry and isopycnic sucrose gradient analyses confirmed the IDO2 protein localization in the cell membrane compartment, and the immunoprecipitation of tyrosine-phosphorylated proteins revealed that kinase activities can target IDO2. The different localization from the cytosolic one and the phosphorylation state are the first indications for the signaling function of IDO2, suggesting that the IDO2 non-enzymatic role in cancer cells is worthy of deeper understanding.
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Affiliation(s)
- Chiara Suvieri
- Section of Pharmacology, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy; (C.S.); (S.A.); (S.R.); (G.M.); (M.G.); (E.P.); (C.O.); (M.T.P.); (M.L.B.)
| | - Francesca De Marchis
- Institute of Biosciences and Bioresources, Research Division of Perugia, National Research Council (CNR), 06128 Perugia, Italy;
| | - Martina Mandarano
- Section of Anatomic Pathology and Histology, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy;
| | - Sara Ambrosino
- Section of Pharmacology, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy; (C.S.); (S.A.); (S.R.); (G.M.); (M.G.); (E.P.); (C.O.); (M.T.P.); (M.L.B.)
| | - Sofia Rossini
- Section of Pharmacology, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy; (C.S.); (S.A.); (S.R.); (G.M.); (M.G.); (E.P.); (C.O.); (M.T.P.); (M.L.B.)
| | - Giada Mondanelli
- Section of Pharmacology, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy; (C.S.); (S.A.); (S.R.); (G.M.); (M.G.); (E.P.); (C.O.); (M.T.P.); (M.L.B.)
| | - Marco Gargaro
- Section of Pharmacology, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy; (C.S.); (S.A.); (S.R.); (G.M.); (M.G.); (E.P.); (C.O.); (M.T.P.); (M.L.B.)
| | - Eleonora Panfili
- Section of Pharmacology, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy; (C.S.); (S.A.); (S.R.); (G.M.); (M.G.); (E.P.); (C.O.); (M.T.P.); (M.L.B.)
| | - Ciriana Orabona
- Section of Pharmacology, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy; (C.S.); (S.A.); (S.R.); (G.M.); (M.G.); (E.P.); (C.O.); (M.T.P.); (M.L.B.)
| | - Maria Teresa Pallotta
- Section of Pharmacology, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy; (C.S.); (S.A.); (S.R.); (G.M.); (M.G.); (E.P.); (C.O.); (M.T.P.); (M.L.B.)
| | - Maria Laura Belladonna
- Section of Pharmacology, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy; (C.S.); (S.A.); (S.R.); (G.M.); (M.G.); (E.P.); (C.O.); (M.T.P.); (M.L.B.)
| | - Claudia Volpi
- Section of Pharmacology, Department of Medicine and Surgery, University of Perugia, 06129 Perugia, Italy; (C.S.); (S.A.); (S.R.); (G.M.); (M.G.); (E.P.); (C.O.); (M.T.P.); (M.L.B.)
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Xie H, Li Z, Zheng G, Yang C, Liu X, Xu X, Ren Y, Wang C, Hu X. Tim-3 downregulation by Toxoplasma gondii infection contributes to decidual dendritic cell dysfunction. Parasit Vectors 2022; 15:393. [PMID: 36303229 PMCID: PMC9615254 DOI: 10.1186/s13071-022-05506-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 09/16/2022] [Indexed: 11/26/2022] Open
Abstract
Background Women in early pregnancy infected by Toxoplasma gondii may have severe adverse pregnancy outcomes, such as spontaneous abortion and fetal malformation. The inhibitory molecule T cell immunoglobulin and mucin domain 3 (Tim-3) is highly expressed on decidual dendritic cells (dDCs) and plays an important role in maintaining immune tolerance. However, whether T. gondii infection can cause dDC dysfunction by influencing the expression of Tim-3 and further participate in adverse pregnancy outcomes is still unclear. Methods An abnormal pregnancy model in Tim-3-deficient mice and primary human dDCs treated with Tim-3 neutralizing antibodies were used to examine the effect of Tim-3 expression on dDC dysfunction after T. gondii infection. Results Following T. gondii infection, the expression of Tim-3 on dDCs was downregulated, those of the pro-inflammatory functional molecules CD80, CD86, MHC-II, tumor necrosis factor-α (TNF-α), and interleukin-12 (IL-12) were increased, while those of the tolerant molecules indoleamine 2,3-dioxygenase (IDO) and interleukin-10 (IL-10) were significantly reduced. Tim-3 downregulation by T. gondii infection was closely associated with an increase in proinflammatory molecules and a decrease in tolerant molecules, which further resulted in dDC dysfunction. Moreover, the changes in Tim-3 induced by T. gondii infection further reduced the secretion of the cytokine IL-10 via the SRC-signal transducer and activator of transcription 3 (STAT3) pathway, which ultimately contributed to abnormal pregnancy outcomes. Conclusions Toxoplasma gondii infection can significantly downregulate the expression of Tim-3 and cause the aberrant expression of functional molecules in dDCs. This leads to dDC dysfunction, which can ultimately contribute to abnormal pregnancy outcomes. Further, the expression of the anti-inflammatory molecule IL-10 was significantly decreased by Tim-3 downregulation, which was mediated by the SRC-STAT3 signaling pathway in dDCs after T. gondii infection. Supplementary Information The online version contains supplementary material available at 10.1186/s13071-022-05506-1.
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Affiliation(s)
- Hongbing Xie
- Department of Immunology, Binzhou Medical University, Yantai, 264003, Shandong, People's Republic of China
| | - Zhidan Li
- Department of Immunology, Binzhou Medical University, Yantai, 264003, Shandong, People's Republic of China
| | - Guangmei Zheng
- Department of Immunology, Binzhou Medical University, Yantai, 264003, Shandong, People's Republic of China
| | - Chunyan Yang
- Department of Oral Biology, Binzhou Medical University, Yantai, 264003, Shandong, People's Republic of China
| | - Xianbing Liu
- Department of Immunology, Binzhou Medical University, Yantai, 264003, Shandong, People's Republic of China
| | - Xiaoyan Xu
- Department of Immunology, Binzhou Medical University, Yantai, 264003, Shandong, People's Republic of China
| | - Yushan Ren
- Department of Immunology, Binzhou Medical University, Yantai, 264003, Shandong, People's Republic of China
| | - Chao Wang
- Department of Immunology, Binzhou Medical University, Yantai, 264003, Shandong, People's Republic of China
| | - Xuemei Hu
- Department of Immunology, Binzhou Medical University, Yantai, 264003, Shandong, People's Republic of China.
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Pallotta MT, Rossini S, Suvieri C, Coletti A, Orabona C, Macchiarulo A, Volpi C, Grohmann U. Indoleamine 2,3-dioxygenase 1 (IDO1): an up-to-date overview of an eclectic immunoregulatory enzyme. FEBS J 2022; 289:6099-6118. [PMID: 34145969 PMCID: PMC9786828 DOI: 10.1111/febs.16086] [Citation(s) in RCA: 59] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 06/04/2021] [Accepted: 06/18/2021] [Indexed: 12/30/2022]
Abstract
Indoleamine 2,3-dioxygenase 1 (IDO1) catalyzes the initial rate-limiting step in the degradation of the essential amino acid tryptophan along the kynurenine pathway. When discovered more than 50 years ago, IDO1 was thought to be an effector molecule capable of mediating a survival strategy based on the deprivation of bacteria and tumor cells of the essential amino acid tryptophan. Since 1998, when tryptophan catabolism was discovered to be crucially involved in the maintenance of maternal T-cell tolerance, IDO1 has become the focus of several laboratories around the world. Indeed, IDO1 is now considered as an authentic immune regulator not only in pregnancy, but also in autoimmune diseases, chronic inflammation, and tumor immunity. However, in the last years, a bulk of new information-including structural, biological, and functional evidence-on IDO1 has come to light. For instance, we now know that IDO1 has a peculiar conformational plasticity and, in addition to a complex and highly regulated catalytic activity, is capable of performing a nonenzymic function that reprograms the expression profile of immune cells toward a highly immunoregulatory phenotype. With this state-of-the-art review, we aimed at gathering the most recent information obtained for this eclectic protein as well as at highlighting the major unresolved questions.
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Affiliation(s)
| | - Sofia Rossini
- Department of Medicine and SurgeryUniversity of PerugiaItaly
| | - Chiara Suvieri
- Department of Medicine and SurgeryUniversity of PerugiaItaly
| | - Alice Coletti
- Department of Pharmaceutical SciencesUniversity of PerugiaItaly
| | - Ciriana Orabona
- Department of Medicine and SurgeryUniversity of PerugiaItaly
| | | | - Claudia Volpi
- Department of Medicine and SurgeryUniversity of PerugiaItaly
| | - Ursula Grohmann
- Department of Medicine and SurgeryUniversity of PerugiaItaly
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6
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Wiśnicki K, Donizy P, Remiorz A, Janczak D, Krajewska M, Banasik M. Significance of Indoleamine 2,3-Dioxygenase Expression in the Immunological Response of Kidney Graft Recipients. Diagnostics (Basel) 2022; 12:2353. [PMID: 36292041 PMCID: PMC9600090 DOI: 10.3390/diagnostics12102353] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 09/24/2022] [Accepted: 09/25/2022] [Indexed: 11/17/2022] Open
Abstract
Kidney transplantation is unquestionably the most advantageous and preferred treatment when patients with end-stage renal disease are considered. It does have a substantially positive influence on both the quality and expectancy of their lives. Thus, it is quintessential to extend the survival rate of kidney grafts. On account of T-cell-focused treatment, this is being exponentially achieved. The kynurenine pathway, as an immunosuppressive apparatus, and indoleamine 2,3-dioxygenase (IDO1), as its main regulator, are yet to be exhaustively explored. This review presents the recognised role of IDO1 and its influence on the kynurenine pathway, with emphasis on immunosuppression in kidney transplant protection.
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Affiliation(s)
- Krzysztof Wiśnicki
- Department of Nephrology and Transplantation Medicine, Wroclaw Medical University, 50-556 Wroclaw, Poland
| | - Piotr Donizy
- Department of Clinical and Experimental Pathology, Wroclaw Medical University, 50-556 Wroclaw, Poland
| | - Agata Remiorz
- Department of Nephrology and Transplantation Medicine, Wroclaw Medical University, 50-556 Wroclaw, Poland
| | - Dariusz Janczak
- Department of Vascular, General and Transplantation Surgery, Wroclaw Medical University, 50-556 Wroclaw, Poland
| | - Magdalena Krajewska
- Department of Nephrology and Transplantation Medicine, Wroclaw Medical University, 50-556 Wroclaw, Poland
| | - Mirosław Banasik
- Department of Nephrology and Transplantation Medicine, Wroclaw Medical University, 50-556 Wroclaw, Poland
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7
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Cristina B, Veronica R, Silvia A, Andrea G, Sara C, Luca P, Nicoletta B, M.C. BJ, Silvio B, Fabio T. Identification and characterization of the kynurenine pathway in the pond snail Lymnaea stagnalis. Sci Rep 2022; 12:15617. [PMID: 36114337 PMCID: PMC9481534 DOI: 10.1038/s41598-022-19652-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 09/01/2022] [Indexed: 11/10/2022] Open
Abstract
Dysregulation of the kynurenine pathway (KP) is implicated in many human diseases and disorders, from immunological, metabolic, neurodegenerative, and neuropsychiatric conditions to cancer, and represents an appealing target for new therapeutic approaches. In this intricate scenario, invertebrates, like Lymnaea stagnalis (LS), provide a flexible tool to unravel the complexity of the KP. Starting from the available LS genome and transcriptome, we identified putative transcripts of all KP enzymes containing an ORF; each predicted protein possessed a high degree of sequence conservation to known orthologues of other invertebrate and vertebrate model organisms. Sequences were confirmed by qualitative PCR and sequencing. At the same time, the qRT-PCR analysis revealed that Lym IDO-like, Lym TDO-like, Lym AFMID-like, Lym KMO-like, Lym AADAT-like, Lym KYAT I/III-like, Lym KYNU-like, Lym HAAO-like, and Lym ACMSD-like showed widespread tissue expression. Then, tryptophan, kynurenine, kynurenic acid, anthranilic acid, 3-hydroxy-kynurenine, xanthurenic acid, picolinic acid, and quinolinic acid were identified in the hemolymph of LS by UHPLC-Q exactive mass spectrometer. Our study provides the most thorough characterization to date of the KP in an invertebrate model, supporting the value of LS for future functional studies of this pathway at the cellular, synaptic, and behavioral levels.
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8
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Unbalanced IDO1/IDO2 Endothelial Expression and Skewed Keynurenine Pathway in the Pathogenesis of COVID-19 and Post-COVID-19 Pneumonia. Biomedicines 2022; 10:biomedicines10061332. [PMID: 35740354 PMCID: PMC9220124 DOI: 10.3390/biomedicines10061332] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 05/29/2022] [Accepted: 06/02/2022] [Indexed: 11/17/2022] Open
Abstract
Despite intense investigation, the pathogenesis of COVID-19 and the newly defined long COVID-19 syndrome are not fully understood. Increasing evidence has been provided of metabolic alterations characterizing this group of disorders, with particular relevance of an activated tryptophan/kynurenine pathway as described in this review. Recent histological studies have documented that, in COVID-19 patients, indoleamine 2,3-dioxygenase (IDO) enzymes are differentially expressed in the pulmonary blood vessels, i.e., IDO1 prevails in early/mild pneumonia and in lung tissues from patients suffering from long COVID-19, whereas IDO2 is predominant in severe/fatal cases. We hypothesize that IDO1 is necessary for a correct control of the vascular tone of pulmonary vessels, and its deficiency in COVID-19 might be related to the syndrome’s evolution toward vascular dysfunction. The complexity of this scenario is discussed in light of possible therapeutic manipulations of the tryptophan/kynurenine pathway in COVID-19 and post-acute COVID-19 syndromes.
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9
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Yuasa HJ. Inhibitory effect of ascorbate on tryptophan 2,3-dioxygenase. J Biochem 2022; 171:653-661. [PMID: 35244712 DOI: 10.1093/jb/mvac024] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 03/02/2022] [Indexed: 11/13/2022] Open
Abstract
Tryptophan 2,3-dioxygenase (TDO) and indoleamine 2,3-dioxygenase (IDO) catalyze the same reaction, oxidative cleavage of L-tryptophan (L-Trp) to N-formyl-kynurenine. In both enzymes, the ferric (FeIII) form is inactive, and ascorbate (Asc) is frequently used as a reductant in in vitro assays to activate the enzymes by reducing the heme iron. Recently, it has been reported that Asc activates IDO2 by acting as a reductant, however, it is also a competitive inhibitor of the enzyme. Here, the effect of Asc on human TDO (hTDO) is investigated. Similar to its interaction with IDO2, Asc acts as both a reductant and a competitive inhibitor of hTDO in the absence of catalase, and its inhibitory effect was enhanced by the addition of H2O2. Interestingly, however, no inhibitory effect of Asc was observed in the presence of catalase. TDO is known to be activated by H2O2 and a ferryl-oxo (FeIV=O) intermediate (Compound II) is generated during the activation process. The observation that Asc acts as a competitive inhibitor of hTDO only in the absence of catalase can be explained by assuming that the target of Asc is Compound II. Asc seems to compete with L-Trp in an unusual manner.
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Affiliation(s)
- Hajime Julie Yuasa
- Laboratory of Biochemistry, Department of Chemistry and Biotechnology, Faculty of Science and Technology, National University Corporation Kochi University, Kochi 780-8520, Japan
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10
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Esmaeili SA, Hajavi J. The role of indoleamine 2,3-dioxygenase in allergic disorders. Mol Biol Rep 2022; 49:3297-3306. [PMID: 35028850 DOI: 10.1007/s11033-021-07067-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 12/08/2021] [Indexed: 01/08/2023]
Abstract
The amino acid tryptophan (TRP) is critical for the expansion and survival of cells. During the past few years, the manipulation of tryptophan metabolism via indoleamine 2,3 dioxygenase (IDO) has been presented as a significant regulatory mechanism for tolerance stimulation and the regulation of immune responses. Currently, a considerable number of studies suggest that the role of IDO in T helper 2 (Th2) cell regulation may be different from that of T helper 1 (Th1) immune responses. IDO acts as an immunosuppressive tolerogenic enzyme to decrease allergic responses through the stimulation of the Kynurenine-IDO pathway, the subsequent reduction of TRP, and the promotion of Kynurenine products. Kynurenine products motivate T-cell apoptosis and anergy, the propagation of Treg and Th17 cells, and the aberration of the Th1/Th2 response. We suggest that the IDO-kynurenine pathway can function as a negative reaction round for Th1 cells; however, it may play a different role in upregulating principal Th2 immune responses. In this review, we intend to integrate novel results on this pathway in correlation with allergic diseases.
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Affiliation(s)
- Seyed-Alireza Esmaeili
- Immunology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Immunology Department, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Jafar Hajavi
- Department of Basic Sciences, Faculty of Medicine, Infectious Diseases Research Center, Gonabad University of Medical Science, 9691793718, Gonabad, Iran.
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11
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Cundy NJ, Hare RK, Tang T, Leach AG, Jowitt TA, Qureshi O, Gordon J, Barnes NM, Brady CA, Raven EL, Grainger RS, Butterworth S. Design, synthesis and evaluation of tryptophan analogues as tool compounds to study IDO1 activity. RSC Chem Biol 2021; 2:1651-1660. [PMID: 34977580 PMCID: PMC8637876 DOI: 10.1039/d0cb00209g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 08/20/2021] [Indexed: 11/22/2022] Open
Abstract
The metabolism of l-tryptophan to N-formyl-l-kynurenine by indoleamine-2,3-dioxygenase 1 (IDO1) is thought to play a critical role in tumour-mediated immune suppression. Whilst there has been significant progress in elucidating the overall enzymatic mechanism of IDO1 and related enzymes, key aspects of the catalytic cycle remain poorly understood. Here we report the design, synthesis and biological evaluation of a series of tryptophan analogues which have the potential to intercept putative intermediates in the metabolism of 1 by IDO1. Functionally-relevant binding to IDO1 was demonstrated through enzymatic inhibition, however no IDO1-mediated metabolism of these compounds was observed. Subsequent T m-shift analysis shows the most active compound, 17, exhibits a distinct profile from known competitive IDO1 inhibitors, with docking studies supporting the hypothesis that 17 may bind at the recently-discovered Si site. These findings provide a start-point for development of further mechanistic probes and more potent tryptophan-based IDO1 inhibitors.
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Affiliation(s)
- Nicholas J Cundy
- School of Chemistry, University of Birmingham Edgbaston Birmingham B15 2TT UK
| | - Roseanna K Hare
- Division of Infection, Immunity and Respiratory Medicine, Faculty of Biology, Medicine and Health, University of Manchester Manchester M13 9PL UK
| | - Tina Tang
- Celentyx Ltd, Birmingham Research Park 97 Vincent Drive Birmingham B15 2SQ UK
| | - Andrew G Leach
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, University of Manchester Manchester M13 9PL UK
| | - Thomas A Jowitt
- Wellcome Trust Centre for Cell Matrix Research, Faculty of Biology, Medicine and Health, University of Manchester Manchester M13 9PL UK
| | - Omar Qureshi
- Celentyx Ltd, Birmingham Research Park 97 Vincent Drive Birmingham B15 2SQ UK
| | - John Gordon
- Celentyx Ltd, Birmingham Research Park 97 Vincent Drive Birmingham B15 2SQ UK
| | - Nicholas M Barnes
- Celentyx Ltd, Birmingham Research Park 97 Vincent Drive Birmingham B15 2SQ UK
- Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham Edgbaston Birmingham B15 2TT UK
| | - Catherine A Brady
- Celentyx Ltd, Birmingham Research Park 97 Vincent Drive Birmingham B15 2SQ UK
- Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham Edgbaston Birmingham B15 2TT UK
| | - Emma L Raven
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Richard S Grainger
- School of Chemistry, University of Birmingham Edgbaston Birmingham B15 2TT UK
| | - Sam Butterworth
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, University of Manchester Manchester M13 9PL UK
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12
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Li S, Li S, Zhao Y, Zhang B, Wang X, Yang X, Wang Y, Jia C, Chang Y, Wei W. A comprehensive analysis of TDO2 expression in immune cells and characterization of immune cell phenotype in TDO2 knockout mice. Transgenic Res 2021; 30:781-797. [PMID: 34529208 DOI: 10.1007/s11248-021-00281-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 08/19/2021] [Indexed: 11/28/2022]
Abstract
Tryptophan 2,3-dioxygenase (TDO2) was an initial rate-limiting enzyme of the kynurenine (Kyn) pathway in tryptophan (Trp) metabolism. We undertook this study to determine a comprehensive analysis of TDO2 expression in immune cells and assess the characterization of immune cell phenotype in TDO2 knockout mice. The expression of TDO2 in various tissues of DBA/1 mice was detected by quantitative real-time PCR (qPCR) and immunohistochemistry. Both flow cytometry and immunofluorescence were used to analyze the expression of TDO2 in immune cells. Furthermore, TDO2 knockout (KO) mice were generated by CRISPR/Cas9 technology to detect immune cell phenotype. TDO2 protein level in liver was tested by western blot. High-performance liquid chromatography was used to detect the level of Trp and Kyn. Flow cytometry was used to test the proportions of splenic lymphocyte subsets in wild-type (WT) and TDO2 KO mice. We found that TDO2 was expressed in various tissues and immune cells, and TDO2 staining was mainly observed in the cytoplasm of cells. There was no difference in the development of immune cells between TDO2 KO mice and WT mice, including T cells, B cells, memory B cells, plasma cells, dendritic cells, and natural killer cells. Interestingly, the reduced M1/M2 ratio was observed in the peritoneal macrophages of TDO2 KO mice. Taken together, these findings enriched the known expression profile of TDO2, especially its expression in immune cells. Our study suggested that TDO2-mediated Trp-Kyn metabolism pathway might be involved in the immune response.
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Affiliation(s)
- Susu Li
- Institute of Clinical Pharmacology, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China
| | - Siyu Li
- Institute of Clinical Pharmacology, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China
| | - Yingjie Zhao
- Institute of Clinical Pharmacology, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China
| | - Bingjie Zhang
- Institute of Clinical Pharmacology, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China
| | - Xinwei Wang
- Institute of Clinical Pharmacology, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China
| | - Xuezhi Yang
- Institute of Clinical Pharmacology, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China
| | - Yueye Wang
- Institute of Clinical Pharmacology, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China
| | - Chengyan Jia
- Institute of Clinical Pharmacology, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China
| | - Yan Chang
- Institute of Clinical Pharmacology, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China.
| | - Wei Wei
- Institute of Clinical Pharmacology, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Anhui Medical University, 81 Meishan Road, Hefei, 230032, China.
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13
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Krupa A, Kowalska I. The Kynurenine Pathway-New Linkage between Innate and Adaptive Immunity in Autoimmune Endocrinopathies. Int J Mol Sci 2021; 22:9879. [PMID: 34576041 PMCID: PMC8469440 DOI: 10.3390/ijms22189879] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/09/2021] [Accepted: 09/10/2021] [Indexed: 12/18/2022] Open
Abstract
The kynurenine pathway (KP) is highly regulated in the immune system, where it promotes immunosuppression in response to infection or inflammation. Indoleamine 2,3-dioxygenase 1 (IDO1), the main enzyme of KP, has a broad spectrum of activity on immune cells regulation, controlling the balance between stimulation and suppression of the immune system at sites of local inflammation, relevant to a wide range of autoimmune and inflammatory diseases. Various autoimmune diseases, among them endocrinopathies, have been identified to date, but despite significant progress in their diagnosis and treatment, they are still associated with significant complications, morbidity, and mortality. The precise cellular and molecular mechanisms leading to the onset and development of autoimmune disease remain poorly clarified so far. In breaking of tolerance, the cells of the innate immunity provide a decisive microenvironment that regulates immune cells' differentiation, leading to activation of adaptive immunity. The current review provided a comprehensive presentation of the known role of IDO1 and KP activation in the regulation of the innate and adaptive arms of the immune system. Significant attention has been paid to the immunoregulatory role of IDO1 in the most prevalent, organ-specific autoimmune endocrinopathies-type 1 diabetes mellitus (T1DM) and autoimmune thyroiditis.
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Affiliation(s)
- Anna Krupa
- Department of Internal Medicine and Metabolic Diseases, Medical University of Bialystok, M. Sklodowskiej-Curie 24A, 15-276 Bialystok, Poland
| | - Irina Kowalska
- Department of Internal Medicine and Metabolic Diseases, Medical University of Bialystok, M. Sklodowskiej-Curie 24A, 15-276 Bialystok, Poland
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14
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Yuasa HJ, Stocker R. Methylene blue and ascorbate interfere with the accurate determination of the kinetic properties of IDO2. FEBS J 2021; 288:4892-4904. [PMID: 33686747 DOI: 10.1111/febs.15806] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 02/16/2021] [Accepted: 03/08/2021] [Indexed: 11/30/2022]
Abstract
Indoleamine 2,3-dioxygenases (IDOs) catalyze the oxidative cleavage of L-tryptophan (Trp) to N-formylkynurenine. Two IDOs, IDO1 and IDO2, are present in vertebrates. IDO1 is a high-affinity Trp-degrading enzyme involved in several physiological processes. By comparison, IDO2 generally has been reported to have low affinity (high Km -value) for Trp, and the enzyme's in vivo function remains unclear. Using IDOs from different species, we show that compared with ferrous-oxy (Fe2+ -O2 ) IDO1, Fe2+ -O2 IDO2 is substantially more stable and engages in multiple turnovers of the reaction in the absence of a reductant. Without reductant, Fe2+ -O2 IDO2 showed Km -values in the range of 80-356 μM, that is, values substantially lower than reported previously and close to the physiological concentrations of Trp. Methylene blue and ascorbate (Asc), used commonly as the reducing system for IDO activity determination, significantly affected the enzymatic activity of IDO2: In combination, the two reductants increased the apparent Km - and kcat -values 8- to 117-fold and 2-fold, respectively. Asc alone both activated and inhibited IDO2 by acting as a source of electrons and as a weak competitive inhibitor, respectively. In addition, ferric (Fe3+ ) IDO1 and IDO2 exhibited weak dioxygenase activity, similar to tryptophan 2,3-dioxygenase. Our results shed new light in the enzymatic activity of IDO2, and they support the view that this isoform of IDO also participates in the metabolism of Trp in vivo.
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Affiliation(s)
- Hajime J Yuasa
- Laboratory of Biochemistry, Department of Chemistry and Biotechnology, Faculty of Science and Technology, National University Corporation Kochi University, Japan
| | - Roland Stocker
- Arterial Inflammation and Redox Biology Group, Heart Research Institute, Newtown, NSW, Australia
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15
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Li P, Xu W, Liu F, Zhu H, Zhang L, Ding Z, Liang H, Song J. The emerging roles of IDO2 in cancer and its potential as a therapeutic target. Biomed Pharmacother 2021; 137:111295. [PMID: 33550042 DOI: 10.1016/j.biopha.2021.111295] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 01/10/2021] [Accepted: 01/18/2021] [Indexed: 01/03/2023] Open
Abstract
During the past decades, tryptophan metabolism disorder was discovered to play a vital and complex role in the development of cancer. Indoleamine 2,3-dioxygenase 2 (IDO2) is one of the initial and rate-limiting enzymes of the kynurenine pathway of tryptophan catabolism. Increasing evidence indicates that IDO2 is upregulated in some tumors and plays a role in the development of cancer. In spite of the growing body of research, few reviews focused on the role of IDO2 in cancer. Here, we review the emerging knowledge on the roles of IDO2 in cancer and its potential as a therapeutic target. Firstly, the main biological features and regulatory mechanisms are reviewed, after which we focus on the expression and roles of IDO2 in cancer. Finally, we discuss the potential of IDO2 as a therapeutic target for cancer treatment.
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Affiliation(s)
- Pengcheng Li
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Weiqi Xu
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Furong Liu
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - He Zhu
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lu Zhang
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zeyang Ding
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Huifang Liang
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Jia Song
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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16
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Adamo A, Frusteri C, Pallotta MT, Pirali T, Sartoris S, Ugel S. Moonlighting Proteins Are Important Players in Cancer Immunology. Front Immunol 2021; 11:613069. [PMID: 33584695 PMCID: PMC7873856 DOI: 10.3389/fimmu.2020.613069] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 11/30/2020] [Indexed: 12/21/2022] Open
Abstract
Plasticity and adaptation to environmental stress are the main features that tumor and immune system share. Except for intrinsic and high-defined properties, cancer and immune cells need to overcome the opponent's defenses by activating more effective signaling networks, based on common elements such as transcriptional factors, protein-based complexes and receptors. Interestingly, growing evidence point to an increasing number of proteins capable of performing diverse and unpredictable functions. These multifunctional proteins are defined as moonlighting proteins. During cancer progression, several moonlighting proteins are involved in promoting an immunosuppressive microenvironment by reprogramming immune cells to support tumor growth and metastatic spread. Conversely, other moonlighting proteins support tumor antigen presentation and lymphocytes activation, leading to several anti-cancer immunological responses. In this light, moonlighting proteins could be used as promising new potential targets for improving current cancer therapies. In this review, we describe in details 12 unprecedented moonlighting proteins that during cancer progression play a decisive role in guiding cancer-associated immunomodulation by shaping innate or adaptive immune response.
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Affiliation(s)
- Annalisa Adamo
- Section of Immunology, Department of Medicine, University of Verona, Verona, Italy
| | - Cristina Frusteri
- Section of Immunology, Department of Medicine, University of Verona, Verona, Italy
| | | | - Tracey Pirali
- Department of Pharmaceutical Sciences, University of Piemonte Orientale, Novara, Italy
| | - Silvia Sartoris
- Section of Immunology, Department of Medicine, University of Verona, Verona, Italy
| | - Stefano Ugel
- Section of Immunology, Department of Medicine, University of Verona, Verona, Italy
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17
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Singh R, Salunke DB. Diverse chemical space of indoleamine-2,3-dioxygenase 1 (Ido1) inhibitors. Eur J Med Chem 2020; 211:113071. [PMID: 33341650 DOI: 10.1016/j.ejmech.2020.113071] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 11/26/2020] [Accepted: 11/28/2020] [Indexed: 12/20/2022]
Abstract
Indoleamine-2,3-dioxygenase 1 (IDO1) catalyses the first and rate limiting step of kynurenine pathway accounting for the major contributor of L-Tryptophan degradation. The Kynurenine metabolites are identified as essential cofactors, antagonists, neurotoxins, immunomodulators, antioxidants as well as carcinogens. The catalytic active site of IDO1 enzyme consists of hydrophobic Pocket-A positioned in the distal heme site and remains connected to a second hydrophobic Pocket-B towards the entrance of the active site. IDO1 enzyme also relates directly to the modulation of the innate and adaptive immune system. Various studies proved that the over expression of IDO1 enzyme play a predominant role in the escape of immunity during cancer progression. Recently, there has been considerable interest in evaluating the potential of IDO1 inhibitors to mobilize the body's immune system against solid tumours. In the last two decades, enormous attempts to advance new IDO1 inhibitors are on-going both in pharmaceutical industries and in academia which resulted in the discovery of a diverse range of selective and potent IDO1 inhibitors. The IDO1 inhibitors have therapeutic utility in various diseases and in the near future, it may have utility in the treatment of COVID-19. Despite various reviews on IDO1 inhibitors in last five years, none of the reviews provide a complete overview of diverse chemical space including naturally occurring and synthetic IDO1 inhibitors with detailed structure activity relationship studies. The present work provides a complete overview on the IDO1 inhibitors known in the literature so far along with the Structure-Activity Relationship (SAR) in each class of compounds.
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Affiliation(s)
- Rahul Singh
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160 014, India
| | - Deepak B Salunke
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160 014, India; National Interdisciplinary Centre of Vaccine, Immunotherapeutics and Antimicrobials, Panjab University, Chandigarh, 160 014, India.
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18
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Merlo LMF, DuHadaway JB, Montgomery JD, Peng WD, Murray PJ, Prendergast GC, Caton AJ, Muller AJ, Mandik-Nayak L. Differential Roles of IDO1 and IDO2 in T and B Cell Inflammatory Immune Responses. Front Immunol 2020; 11:1861. [PMID: 32973768 PMCID: PMC7461966 DOI: 10.3389/fimmu.2020.01861] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 07/10/2020] [Indexed: 12/16/2022] Open
Abstract
Indoleamine-2,3-dioxygenase (IDO)1 and IDO2 are two closely related tryptophan catabolizing enzymes encoded by linked genes. The IDO pathway is also immunomodulatory, with IDO1 well-characterized as a mediator of tumor immune evasion. Due to its homology with IDO1, IDO2 has been proposed to have a similar immunoregulatory function. Indeed, IDO2, like IDO1, is necessary for the differentiation of regulatory T cells in vitro. However, compared to IDO1, in vivo studies demonstrated a contrasting role for IDO2, with experiments in preclinical models of autoimmune arthritis establishing a proinflammatory role for IDO2 in mediating B and T cell activation driving autoimmune disease. Given their potentially opposing roles in inflammatory responses, interpretation of results obtained using IDO1 or IDO2 single knockout mice could be complicated by the expression of the other enzyme. Here we use IDO1 and IDO2 single and double knockout (dko) mice to define the differential roles of IDO1 and IDO2 in B cell-mediated immune responses. Autoreactive T and B cell responses and severity of joint inflammation were decreased in IDO2 ko, but not IDO1 ko arthritic mice. Dko mice had a reduction in the number of autoantibody secreting cells and severity of arthritis: however, percentages of differentiated T cells and their associated cytokines were not reduced compared to IDO1 ko or wild-type mice. These data suggest that autoreactive B cell responses are mediated by IDO2, while autoreactive T cell responses are indirectly affected by IDO1 expression in the IDO2 ko mice. IDO2 also influenced antibody responses in models of influenza infection and immunization with T cell-independent type II antigens. Taken together, these studies provide evidence for the contrasting roles IDO1 and IDO2 play in immune responses, with IDO1 mediating T cell suppressive effects and IDO2 working directly in B cells as a proinflammatory mediator of B cell responses.
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Affiliation(s)
- Lauren M F Merlo
- Lankenau Institute for Medical Research, Wynnewood, PA, United States
| | - James B DuHadaway
- Lankenau Institute for Medical Research, Wynnewood, PA, United States
| | | | - Wei-Dan Peng
- Lankenau Institute for Medical Research, Wynnewood, PA, United States
| | - Peter J Murray
- Immunoregulation Group, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - George C Prendergast
- Lankenau Institute for Medical Research, Wynnewood, PA, United States.,Department of Pathology, Anatomy and Cell Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, United States.,Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, United States
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19
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Fujii K, Yamamoto Y, Mizutani Y, Saito K, Seishima M. Indoleamine 2,3-Dioxygenase 2 Deficiency Exacerbates Imiquimod-Induced Psoriasis-Like Skin Inflammation. Int J Mol Sci 2020; 21:E5515. [PMID: 32752186 PMCID: PMC7432009 DOI: 10.3390/ijms21155515] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 07/28/2020] [Accepted: 07/31/2020] [Indexed: 12/28/2022] Open
Abstract
Indoleamine 2,3-dioxygenase 1 (IDO1) is an enzyme known to suppress immune responses, and several reports have showed that it is associated with psoriasis. IDO2 is an isoform of IDO1, recently identified as a catalytic enzyme in the tryptophan-kynurenine pathway, which is expressed in dendritic cells and monocytes. The expression of IDO2 in immune cells suggests that IDO2 may contribute to immune functions. However, the role of IDO2 in the pathogenesis of psoriasis remains unclear. In this study, to elucidate the role of IDO2 in psoriasis, we assessed imiquimod (IMQ)-induced psoriasis-like dermatitis in IDO2 knockout (KO) mice. Skin inflammation, evaluated by scoring erythema, scaling, and ear thickness, was significantly worse in the IDO2 KO mice than in the wild-type (WT) mice. The mRNA expression levels of TNF-α, IL-23p19, and IL-17A, key cytokines involved in the development of psoriasis, were also increased in the IDO2 KO mice. Furthermore, immunohistochemistry revealed that the number of Ki67-positive cells in the epidermis and CD4-, CD8-, and IL-17-positive lymphocytes infiltrating the dermis were significantly increased in the IDO2 KO mice. These results suggest that IDO2 might decrease IL-17 expression, thereby resulting in the suppression of skin inflammation in IMQ-induced psoriasis-like dermatitis.
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Affiliation(s)
- Kento Fujii
- Department of Dermatology, Gifu University Graduate School of Medicine, 1-1 Yanagito, Gifu 501-1194, Japan; (Y.M.); (M.S.)
| | - Yasuko Yamamoto
- Department of Disease Control and Prevention, Fujita Health University Graduate School of Health Sciences, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi 470-1192, Japan; (Y.Y.); (K.S.)
| | - Yoko Mizutani
- Department of Dermatology, Gifu University Graduate School of Medicine, 1-1 Yanagito, Gifu 501-1194, Japan; (Y.M.); (M.S.)
| | - Kuniaki Saito
- Department of Disease Control and Prevention, Fujita Health University Graduate School of Health Sciences, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi 470-1192, Japan; (Y.Y.); (K.S.)
| | - Mariko Seishima
- Department of Dermatology, Gifu University Graduate School of Medicine, 1-1 Yanagito, Gifu 501-1194, Japan; (Y.M.); (M.S.)
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20
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Liu Y, Xu P, Liu H, Fang C, Guo H, Chen X, Tan M, Zhang Y, Min W. Silencing IDO2 in dendritic cells: A novel strategy to strengthen cancer immunotherapy in a murine lung cancer model. Int J Oncol 2020; 57:587-597. [PMID: 32468023 DOI: 10.3892/ijo.2020.5073] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 05/06/2020] [Indexed: 11/05/2022] Open
Abstract
While dendritic cell (DC)‑based immunotherapy has achieved satisfactory results in animal models, its effects were not satisfactory as initially expected in clinical applications, despite the safety and varying degrees of effectiveness in various types of cancer. Improving the efficacy of the DC‑based vaccine is essential for cancer immunotherapy. The present study aimed to investigate methods with which to amplify and enhance the antitumor immune response of a DC‑based tumor vaccine by silencing the expression of indoleamine 2,3‑dioxygenase 2 (IDO2), a tryptophan rate‑limiting metabolic enzyme in DCs. In vitro experiments revealed that the silencing of IDO2 in DCs did not affect the differentiation of DCs, whereas it increased their expression of costimulatory molecules following stimulation with tumor necrosis factor (TNF)‑α and tumor lysate from Lewis lung cancer (LLC) cells. In a mixed co‑culture system, the IDO2‑silenced DCs promoted the proliferation of T‑cells and reduced the induction of regulatory T‑cells (Tregs). Further in vivo experiments revealed that the silencing of IDO2 in DCs markedly suppressed the growth of tumor cells. Moreover, treatment with the IDO2‑silenced DC‑based cancer vaccine enhanced cytotoxic T lymphocyte activity, whereas it decreased T‑cell apoptosis and the percentage of CD4+CD25+Foxp3+ Tregs. On the whole, the present study provides evidence that the silencing of the tryptophan rate‑limiting metabolic enzyme, IDO2, has the potential to enhance the efficacy of DC‑based cancer immunotherapy.
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Affiliation(s)
- Yanling Liu
- Medical Laboratory, Jiangxi University of Technology, Nanchang, Jiangxi 330098, P.R. China
| | - Ping Xu
- Medical Laboratory, Jiangxi University of Technology, Nanchang, Jiangxi 330098, P.R. China
| | - Huan Liu
- Medical Laboratory, Jiangxi University of Technology, Nanchang, Jiangxi 330098, P.R. China
| | - Chunjuan Fang
- Medical Laboratory, Jiangxi University of Technology, Nanchang, Jiangxi 330098, P.R. China
| | - Haihe Guo
- Medical Laboratory, Jiangxi University of Technology, Nanchang, Jiangxi 330098, P.R. China
| | - Xiaoyan Chen
- Medical Laboratory, Jiangxi University of Technology, Nanchang, Jiangxi 330098, P.R. China
| | - Manman Tan
- Institute of Immunotherapy, Nanchang University and Jiangxi Academy of Medical Science, Nanchang, Jiangxi 330098, P.R. China
| | - Yujuan Zhang
- Institute of Immunotherapy, Nanchang University and Jiangxi Academy of Medical Science, Nanchang, Jiangxi 330098, P.R. China
| | - Weiping Min
- Institute of Immunotherapy, Nanchang University and Jiangxi Academy of Medical Science, Nanchang, Jiangxi 330098, P.R. China
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21
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Salmon T, Bruno CEM, de Amorim AF, Kfoury Junior JR. Presence of the protein indoleamine 2,3-dioxygenase (IDO) in the maternal-fetal interface of the yolk sac placenta of blue shark, Prionace glauca. FISH & SHELLFISH IMMUNOLOGY 2020; 100:256-260. [PMID: 32097719 DOI: 10.1016/j.fsi.2020.02.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 02/15/2020] [Accepted: 02/21/2020] [Indexed: 06/10/2023]
Abstract
Indoleamine 2 3-dioxygenase (IDO) is a protein usually described in mammals, which, among other functions, participates in the maternal-fetal tolerance process. The blue-shark, Prionace glauca (Linnaeus, 1758) is a viviparous placentary species in which the yolk sac develops during the pregnancy, turning into a placenta for matrotrophic nutrition of the embryo. The purpose of this study was to investigate the expression of IDO in the P. glauca maternal-fetal interface along three gestation phases and describe its distribution and the meaning of its presence. The results showed IDO labelling during the yolk sac/placenta development in the ectoderm on the three development phases and in the endoderm at the two first phases. In the uterine epithelium, IDO was observed in the last two phases. These interface tissues are major contact areas between the mother and the semiallogeneic conceptus and this relation could induce an immunological response against the fetus. Therefore, the presence of IDO may indicate that it could have a similar role in the mechanism of maternal-fetal tolerance in the P. glauca placental interface, as described in eutherian mammals.
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Affiliation(s)
- Thierry Salmon
- Sector of Anatomy, Department of Surgery, Faculty of Veterinary Medicine and Animal Science, University of São Paulo, Brazil.
| | - Carlos Eduardo M Bruno
- Sector of Anatomy, Department of Surgery, Faculty of Veterinary Medicine and Animal Science, University of São Paulo, Brazil
| | | | - José Roberto Kfoury Junior
- Sector of Anatomy, Department of Surgery, Faculty of Veterinary Medicine and Animal Science, University of São Paulo, Brazil
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22
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Moffett JR, Arun P, Puthillathu N, Vengilote R, Ives JA, Badawy AAB, Namboodiri AM. Quinolinate as a Marker for Kynurenine Metabolite Formation and the Unresolved Question of NAD + Synthesis During Inflammation and Infection. Front Immunol 2020; 11:31. [PMID: 32153556 PMCID: PMC7047773 DOI: 10.3389/fimmu.2020.00031] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 01/08/2020] [Indexed: 12/26/2022] Open
Abstract
Quinolinate (Quin) is a classic example of a biochemical double-edged sword, acting as both essential metabolite and potent neurotoxin. Quin is an important metabolite in the kynurenine pathway of tryptophan catabolism leading to the de novo synthesis of nicotinamide adenine dinucleotide (NAD+). As a precursor for NAD+, Quin can direct a portion of tryptophan catabolism toward replenishing cellular NAD+ levels in response to inflammation and infection. Intracellular Quin levels increase dramatically in response to immune stimulation [e.g., lipopolysaccharide (LPS) or pokeweed mitogen (PWM)] in macrophages, microglia, dendritic cells, and other cells of the immune system. NAD+ serves numerous functions including energy production, the poly ADP ribose polymerization (PARP) reaction involved in DNA repair, and the activity of various enzymes such as the NAD+-dependent deacetylases known as sirtuins. We used highly specific antibodies to protein-coupled Quin to delineate cells that accumulate Quin as a key aspect of the response to immune stimulation and infection. Here, we describe Quin staining in the brain, spleen, and liver after LPS administration to the brain or systemic PWM administration. Quin expression was strong in immune cells in the periphery after both treatments, whereas very limited Quin expression was observed in the brain even after direct LPS injection. Immunoreactive cells exhibited diverse morphology ranging from foam cells to cells with membrane extensions related to cell motility. We also examined protein expression changes in the spleen after kynurenine administration. Acute (8 h) and prolonged (48 h) kynurenine administration led to significant changes in protein expression in the spleen, including multiple changes involved with cytoskeletal rearrangements associated with cell motility. Kynurenine administration resulted in several expression level changes in proteins associated with heat shock protein 90 (HSP90), a chaperone for the aryl-hydrocarbon receptor (AHR), which is the primary kynurenine metabolite receptor. We propose that cells with high levels of Quin are those that are currently releasing kynurenine pathway metabolites as well as accumulating Quin for sustained NAD+ synthesis from tryptophan. Further, we propose that the kynurenine pathway may be linked to the regulation of cell motility in immune and cancer cells.
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Affiliation(s)
- John R. Moffett
- Departments of Anatomy, Physiology and Genetics and Neuroscience Program, Uniformed Services University Medical School, Bethesda, MD, United States
| | - Peethambaran Arun
- Departments of Anatomy, Physiology and Genetics and Neuroscience Program, Uniformed Services University Medical School, Bethesda, MD, United States
| | - Narayanan Puthillathu
- Departments of Anatomy, Physiology and Genetics and Neuroscience Program, Uniformed Services University Medical School, Bethesda, MD, United States
| | - Ranjini Vengilote
- Departments of Anatomy, Physiology and Genetics and Neuroscience Program, Uniformed Services University Medical School, Bethesda, MD, United States
| | - John A. Ives
- The Center for Brain, Mind, and Healing, Samueli Institute, Alexandria, VA, United States
| | | | - Aryan M. Namboodiri
- Departments of Anatomy, Physiology and Genetics and Neuroscience Program, Uniformed Services University Medical School, Bethesda, MD, United States
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Rad Pour S, Morikawa H, Kiani NA, Gomez-Cabrero D, Hayes A, Zheng X, Pernemalm M, Lehtiö J, Mole DJ, Hansson J, Eriksson H, Tegnér J. Immunometabolic Network Interactions of the Kynurenine Pathway in Cutaneous Malignant Melanoma. Front Oncol 2020; 10:51. [PMID: 32117720 PMCID: PMC7017805 DOI: 10.3389/fonc.2020.00051] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 01/13/2020] [Indexed: 12/16/2022] Open
Abstract
Dysregulation of the kynurenine pathway has been regarded as a mechanism of tumor immune escape by the enzymatic activity of indoleamine 2, 3 dioxygenase and kynurenine production. However, the immune-modulatory properties of other kynurenine metabolites such as kynurenic acid, 3-hydroxykynurenine, and anthranilic acid are poorly understood. In this study, plasma from patients diagnosed with metastatic cutaneous malignant melanoma (CMM) was obtained before (PRE) and during treatment (TRM) with inhibitors of mitogen-activated protein kinase pathway (MAPKIs). Immuno-oncology related protein profile and kynurenine metabolites were analyzed by proximity extension assay (PEA) and LC/MS-MS, respectively. Correlation network analyses of the data derived from PEA and LC/MS-MS identified a set of proteins that modulate the differentiation of Th1 cells, which is linked to 3-hydroxykynurenine levels. Moreover, MAPKIs treatments are associated with alteration of 3-hydroxykynurenine and 3hydroxyanthranilic acid (3HAA) concentrations and led to higher "CXCL11," and "KLRD1" expression that are involved in T and NK cells activation. These findings imply that the kynurenine pathway is pathologically relevant in patients with CMM.
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Affiliation(s)
- Soudabeh Rad Pour
- Unit of Computational Medicine, Department of Medicine, Centre for Molecular Medicine, Karolinska Institute, Stockholm, Sweden
| | - Hiromasa Morikawa
- Biological and Environmental Sciences and Engineering Division (BESE), Computer, Electrical, and Mathematical Sciences and Engineering Division (CEMSE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Narsis A. Kiani
- Unit of Computational Medicine, Department of Medicine, Centre for Molecular Medicine, Karolinska Institute, Stockholm, Sweden
- Unit of Computational Medicine, Algorithmic Dynamics Lab, Department of Medicine Solna, Centre for Molecular Medicine, Karolinska Institute and SciLifeLab, Stockholm, Sweden
| | - David Gomez-Cabrero
- Unit of Computational Medicine, Department of Medicine, Centre for Molecular Medicine, Karolinska Institute, Stockholm, Sweden
- Navarrabiomed, Complejo Hospitalario de Navarra (CHN), Universidad Pública de Navarra (UPNA), IdiSNA, Pamplona, Sweden
| | - Alistair Hayes
- MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Xiaozhong Zheng
- MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Maria Pernemalm
- Department of Oncology-Pathology, Karolinska Institute, Stockholm, Sweden
| | - Janne Lehtiö
- Department of Oncology-Pathology, Karolinska Institute, Stockholm, Sweden
| | - Damian J. Mole
- MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Johan Hansson
- Department of Oncology-Pathology, Karolinska Institute, Stockholm, Sweden
- Department of Oncology/Skin Cancer Center, Theme Cancer, Karolinska University Hospital, Stockholm, Sweden
| | - Hanna Eriksson
- Department of Oncology-Pathology, Karolinska Institute, Stockholm, Sweden
- Department of Oncology/Skin Cancer Center, Theme Cancer, Karolinska University Hospital, Stockholm, Sweden
| | - Jesper Tegnér
- Unit of Computational Medicine, Department of Medicine, Centre for Molecular Medicine, Karolinska Institute, Stockholm, Sweden
- Biological and Environmental Sciences and Engineering Division (BESE), Computer, Electrical, and Mathematical Sciences and Engineering Division (CEMSE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
- Unit of Computational Medicine, Algorithmic Dynamics Lab, Department of Medicine Solna, Centre for Molecular Medicine, Karolinska Institute and SciLifeLab, Stockholm, Sweden
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24
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Doyle C, Swain WA, Swain Ewald HA, Ewald PW. Inflammation, infection and depression: an evolutionary perspective. EVOLUTIONARY HUMAN SCIENCES 2019; 1:e14. [PMID: 37588396 PMCID: PMC10427271 DOI: 10.1017/ehs.2019.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The evolutionary basis for clinical depression is not well understood. A growing body of literature that is not based on evolutionary logic links inflammation to depression. Integration of these findings with an evolutionary framework for depression, however, needs to address the reasons why the body's inflammatory response would be regulated so poorly that it would result in incapacitating depression. Pathogen induction of inflammation offers an explanation, but the extent to which the association between inflammation and depression can be attributed to general inflammation as opposed to particular effects of pro-inflammatory pathogens remains unclear. This paper reports a study of sexually transmitted pathogens, which addresses this issue. Although several sexually transmitted pathogens were associated with depression according to bivariate tests, only Chlamydia trachomatis and Trichomonas vaginalis were significantly associated with depression by a multivariate analysis that accounted for correlations among the pathogens. This finding is consistent with the hypothesis that infection may contribute to depression through induction of tryptophan restriction, and a consequent depletion of serotonin. It reinforces the idea that some depression may be caused by specific pathogens in specific evolutionary arms races with their human host.
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Affiliation(s)
- Caroline Doyle
- Department of Biology, Bellarmine University, Louisville, KY40205, USA
| | - Walker A. Swain
- Department of Lifelong Education, Administration, and Policy, University of Georgia, Athens, GA30602, USA
| | - Holly A. Swain Ewald
- Department of Biological Sciences, University of Louisville, Louisville, KY40292, USA
| | - Paul W. Ewald
- Department of Biological Sciences, University of Louisville, Louisville, KY40292, USA
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25
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Yang D, Zhang S, Fang X, Guo L, Hu N, Guo Z, Li X, Yang S, He JC, Kuang C, Yang Q. N-Benzyl/Aryl Substituted Tryptanthrin as Dual Inhibitors of Indoleamine 2,3-Dioxygenase and Tryptophan 2,3-Dioxygenase. J Med Chem 2019; 62:9161-9174. [PMID: 31580660 DOI: 10.1021/acs.jmedchem.9b01079] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Indoleamine 2,3-dioxygenase 1 (IDO1), which catalyzes the initial and rate-limiting step of the kynurenine pathway of tryptophan catabolism, has emerged as a key target in cancer immunotherapy because of its role in enabling cancers to evade the immune system. Tryptophan 2,3-dioxygenase (TDO) and indoleamine 2,3-dioxygenase 2 (IDO2) catalyze the same reaction and play a potential role in cancer immunotherapy. Starting from our previously discovered tryptanthrin IDO1 inhibitor scaffold, we synthesized novel N-benzyl/aryl substituted tryptanthrin derivatives and evaluated their inhibitory efficacy on IDO1, TDO, and IDO2. Most compounds showed similar high inhibitory activities on both IDO1 and TDO, which were significantly superior over that of IDO2 with magnitude difference. We showed that N-benzyl/aryl substituted tryptanthrin directly interacted with IDO1, TDO, and IDO2, significantly augmented the proliferation of T cells in vitro, blocked the kynurenine pathway, and suppressed tumor growth when administered to LLC and H22 tumor-bearing mice.
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Affiliation(s)
- Dan Yang
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences , Fudan University , Songhu Road 2005 , Shanghai 200438 , China
| | - Shengnan Zhang
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences , Fudan University , Songhu Road 2005 , Shanghai 200438 , China
| | - Xin Fang
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences , Fudan University , Songhu Road 2005 , Shanghai 200438 , China
| | - Leilei Guo
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences , Fudan University , Songhu Road 2005 , Shanghai 200438 , China
| | - Nan Hu
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences , Fudan University , Songhu Road 2005 , Shanghai 200438 , China
| | - Zhanling Guo
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences , Fudan University , Songhu Road 2005 , Shanghai 200438 , China
| | - Xishuai Li
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences , Fudan University , Songhu Road 2005 , Shanghai 200438 , China
| | - Shuangshuang Yang
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences , Fudan University , Songhu Road 2005 , Shanghai 200438 , China
| | - Jin Chao He
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences , Fudan University , Songhu Road 2005 , Shanghai 200438 , China
| | - Chunxiang Kuang
- Department of Chemistry , Tongji University , Siping Road 1239 , Shanghai 200092 , China
| | - Qing Yang
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences , Fudan University , Songhu Road 2005 , Shanghai 200438 , China
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26
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Abstract
Indoleamine 2,3-dioxygenase 1 (IDO1) catalyzes the first and rate-limiting reaction of l-tryptophan (Trp) conversion into l-kynurenine (Kyn). The depletion of Trp, and the accumulation of Kyn have been proposed as mechanisms that contribute to the suppression of the immune response-primarily evidenced by in vitro study. IDO1 is therefore considered to be an immunosuppressive modulator and quantification of IDO1 metabolism may be critical to understanding its role in select immunopathologies, including autoimmune- and oncological-conditions, as well as for determining the potency of IDO1 enzyme inhibitors. Because tryptophan 2,3-dioxygenase (TDO), and to a significantly lesser extent, IDO2, also catabolize Trp into Kyn, it's important to differentiate the contribution of each enzyme to Trp catabolism and Kyn generation. Moreover, a great variety of detection methods have been developed for the quantification of Trp metabolites, but choosing the suitable protocol remains challenging. Here, we review the differential expression of IDO1/TDO/IDO2 in normal and malignant tissues, followed by a comprehensive analysis of methodologies for quantifying Trp and Kyn in vitro and in vivo, with an emphasis on the advantages/disadvantages for each application.
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27
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Yuasa HJ. A comprehensive comparison of the metazoan tryptophan degrading enzymes. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2019; 1868:140247. [PMID: 31276825 DOI: 10.1016/j.bbapap.2019.06.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Revised: 06/28/2019] [Accepted: 06/30/2019] [Indexed: 01/15/2023]
Abstract
Tryptophan 2,3-dioxygenase (TDO) and indoleamine 2,3-dioxygenase (IDO) have an independent origin; however, they have distinctly evolved to catalyze the same reaction. In general, TDO is a single-copy gene in each metazoan species, and TDO enzymes demonstrate similar enzyme activity regardless of their biological origin. In contrast, multiple IDO paralogues are observed in many species, and they display various enzymatic properties. Similar to vertebrate IDO2, invertebrate IDOs generally show low affinity/catalytic efficiency for L-Trp. Meanwhile, two IDO isoforms from scallop (IDO-I and -III) and sponge IDOs show high L-Trp catalytic activity, which is comparable to vertebrate IDO1. Site-directed mutagenesis experiments have revealed that primarily two residues, Tyr located at the 2nd residue on the F-helix (F2nd) and His located at the 9th residue on the G-helix (G9th), are crucial for the high affinity/catalytic efficiency of these 'high performance' invertebrate IDOs. Conversely, those two amino acid substitutions (F2nd/Tyr and G9th/His) resulted in high affinity and catalytic activity in other molluscan 'low performance' IDOs. In human IDO1, G9th is Ser167, whereas the counterpart residue of G9th in human TDO is His76. Previous studies have shown that Ser167 could not be substituted by His because the human IDO1 Ser167His variant showed significantly low catalytic activity. However, this may be specific for human IDO1 because G9th/His was demonstrated to be very effective in increasing the L-Trp affinity even in vertebrate IDOs. Therefore, these findings indicate that the active sites of TDO and IDO are more similar to each other than previously expected.
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Affiliation(s)
- Hajime Julie Yuasa
- Laboratory of Biochemistry, Department of Applied Science, Faculty of Science and Technology, National University Corporation Kochi University, Kochi 780-8520, Japan.
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28
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Hodgkinson JW, Belosevic M, Elks PM, Barreda DR. Teleost contributions to the understanding of mycobacterial diseases. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2019; 96:111-125. [PMID: 30776420 DOI: 10.1016/j.dci.2019.02.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 02/15/2019] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
Few pathogens have shaped human medicine as the mycobacteria. From understanding biological phenomena driving disease spread, to mechanisms of host-pathogen interactions and antibiotic resistance, the Mycobacterium genus continues to challenge and offer insights into the basis of health and disease. Teleost fish models of mycobacterial infections have progressed significantly over the past three decades, now supplying a range of unique tools and new opportunities to define the strategies employed by these Gram-positive bacteria to overcome host defenses, as well as those host antimicrobial pathways that can be used to limit its growth and spread. Herein, we take a comparative perspective and provide an update on the contributions of teleost models to our understanding of mycobacterial diseases.
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Affiliation(s)
- Jordan W Hodgkinson
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Miodrag Belosevic
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Philip M Elks
- The Bateson Centre, University of Sheffield, Western Bank, Sheffield, United Kingdom; Department of Infection and Immunity and Cardiovascular Disease, University of Sheffield, Western Bank, Sheffield, United Kingdom
| | - Daniel R Barreda
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada; Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada.
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29
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Pereiro P, Figueras A, Novoa B. Insights into teleost interferon-gamma biology: An update. FISH & SHELLFISH IMMUNOLOGY 2019; 90:150-164. [PMID: 31028897 DOI: 10.1016/j.fsi.2019.04.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 03/20/2019] [Accepted: 04/02/2019] [Indexed: 06/09/2023]
Abstract
Interferon-gamma (IFN-ϒ) is probably one of the most relevant cytokines orchestrating the immune response in vertebrates. Although the activities mediated by this molecule are well known in mammals, several aspects of the IFN-ϒ system in teleosts remain a riddle to scientists. Numerous studies support a potentially similar role of the fish IFN-ϒ signalling pathway in some well-described immunological processes induced by this cytokine in mammals. Nevertheless, the existence in some teleost species of duplicated ifng genes and an additional gene derived from ifng known as interferon-γ-related (ifngrel), among other things, raises new interesting questions about the mode of action of these various molecules in fish. Moreover, certain IFN-ϒ-mediated activities recently observed in mammals are still fully unknown in fish. Another attractive but mainly unexplored curious property of IFN-ϒ in vertebrates is its potential dual role depending on the type of pathogen. In addition, some aspects mediated by this molecule could favour the resolution of a bacterial infection but be harmful in the context of a viral disease, and vice versa. This review collects old and new aspects of IFN-ϒ research in teleosts and discusses new questions and pathways of investigation based on recent discoveries in mammals.
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Affiliation(s)
- Patricia Pereiro
- Instituto de Investigaciones Marinas (IIM), CSIC, Vigo, Spain; Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), University of Concepción, Concepción, Chile
| | | | - Beatriz Novoa
- Instituto de Investigaciones Marinas (IIM), CSIC, Vigo, Spain.
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30
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Cui ZW, Zhang XY, Zhang XJ, Wu N, Lu LF, Li S, Chen DD, Zhang YA. Molecular and functional characterization of the indoleamine 2,3-dioxygenase in grass carp (Ctenopharyngodon idella). FISH & SHELLFISH IMMUNOLOGY 2019; 89:301-308. [PMID: 30965085 DOI: 10.1016/j.fsi.2019.04.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 03/20/2019] [Accepted: 04/02/2019] [Indexed: 06/09/2023]
Abstract
Indoleamine 2,3-dioxygenase (IDO) is a kind of dioxygenase that can catalyze the degradation of levo-tryptophan (L-Trp) and plays key roles in immune tolerance. In this study, the IDO gene was cloned and functionally characterized from grass carp (gcIDO). The results showed that gcIDO overexpressed in GCO cells could catalyze the degradation of L-Trp through the L-Trp - kynurenine pathway, and this activity could be promoted by δ-aminolevulinic acid (ALA) while inhibited by levo-1-methyl tryptophan (L-1MT). Moreover, gcIDO was constitutively expressed in various tissues, and its expression could be significantly up-regulated by LPS and Poly (I:C) in peripheral blood leukocytes (PBLs). Furthermore, recombinant TGF-β1 of grass carp could up-regulate the expression of IDO, TGF-β1, CD25, and Foxp3 in PBLs, indicating that the TGF-β1/IDO pathway is present in fish. In the soybean meal induced enteritis (SBMIE) model, the expression of gcIDO in the intestine was up-regulated significantly, demonstrating that gcIDO may play an immunoregulatory role in SBMIE. Taken together, these data suggest that the IDO plays multiple roles in the immunity of fish.
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Affiliation(s)
- Zheng-Wei Cui
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; University of Chinese Academy of Sciences, Beijing, China
| | - Xiang-Yang Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; University of Chinese Academy of Sciences, Beijing, China
| | - Xu-Jie Zhang
- State Key Laboratory of Agricultural Microbiology, College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | - Nan Wu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Long-Feng Lu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Shun Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Dan-Dan Chen
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Yong-An Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; State Key Laboratory of Agricultural Microbiology, College of Fisheries, Huazhong Agricultural University, Wuhan, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
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31
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Napolioni V, Pariano M, Borghi M, Oikonomou V, Galosi C, De Luca A, Stincardini C, Vacca C, Renga G, Lucidi V, Colombo C, Fiscarelli E, Lass-Flörl C, Carotti A, D'Amico L, Majo F, Russo MC, Ellemunter H, Spolzino A, Mosci P, Brancorsini S, Aversa F, Velardi A, Romani L, Costantini C. Genetic Polymorphisms Affecting IDO1 or IDO2 Activity Differently Associate With Aspergillosis in Humans. Front Immunol 2019; 10:890. [PMID: 31134053 PMCID: PMC6514051 DOI: 10.3389/fimmu.2019.00890] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 04/08/2019] [Indexed: 12/29/2022] Open
Abstract
Aspergillus is the causative agent of human diseases ranging from asthma to invasive infection. Genetic and environmental factors are crucial in regulating the interaction between the host and Aspergillus. The role played by the enzyme indoleamine 2,3-dioxygenase 1 (IDO1), which catalyzes the first and rate-limiting step of tryptophan catabolism along the kynurenine pathway, is increasingly being recognized, but whether and how genetic variation of IDO1 influences the risk of aspergillosis in susceptible patients is incompletely understood. In addition, whether the closely related protein IDO2 plays a similar role remains unexplored. In the present study, we performed genetic association studies in two different cohorts of susceptible patients [cystic fibrosis (CF) patients and recipients of hematopoietic stem cell transplantation (HSCT)], and identified IDO1 polymorphisms that associate with the risk of infection in both cohorts. By using human bronchial epithelial cells and PBMC from CF and HSCT patients, respectively, we could show that the IDO1 polymorphisms appeared to down-modulate IDO1 expression and function in response to IFNγ or Aspergillus conidia, and to associate with an increased inflammatory response. In contrast, IDO2 polymorphisms, including variants known to profoundly affect protein expression and function, were differently associated with the risk of aspergillosis in the two cohorts of patients as no association was found in CF patients as opposed to recipients of HSCT. By resorting to a murine model of bone marrow transplantation, we could show that the absence of IDO2 more severely affected fungal burden and lung pathology upon infection with Aspergillus as compared to IDO1, and this effect appeared to be linked to a deficit in the antifungal effector phagocytic activity. Thus, our study confirms and extends the role of IDO1 in the response to Aspergillus, and shed light on the possible involvement of IDO2 in specific clinical settings.
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Affiliation(s)
- Valerio Napolioni
- Department of Neurology and Neurological Sciences, School of Medicine, Stanford University Stanford, CA, United States
| | - Marilena Pariano
- Department of Experimental Medicine, University of Perugia, Perugia, Italy
| | - Monica Borghi
- Department of Experimental Medicine, University of Perugia, Perugia, Italy
| | - Vasilis Oikonomou
- Department of Experimental Medicine, University of Perugia, Perugia, Italy
| | - Claudia Galosi
- Department of Experimental Medicine, University of Perugia, Perugia, Italy
| | - Antonella De Luca
- Department of Experimental Medicine, University of Perugia, Perugia, Italy
| | | | - Carmine Vacca
- Department of Experimental Medicine, University of Perugia, Perugia, Italy
| | - Giorgia Renga
- Department of Experimental Medicine, University of Perugia, Perugia, Italy
| | - Vincenzina Lucidi
- Unit of Endocrinology and Diabetes, Bambino Gesù Children's Hospital, Rome, Italy
| | - Carla Colombo
- Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy
| | | | - Cornelia Lass-Flörl
- Division of Hygiene and Medical Microbiology, Innsbruck Medical University, Innsbruck, Austria
| | - Alessandra Carotti
- Institute of Hematology-Centro di Ricerche Emato-Oncologiche, University of Perugia, Perugia, Italy
| | - Lucia D'Amico
- Institute of Hematology-Centro di Ricerche Emato-Oncologiche, University of Perugia, Perugia, Italy
| | - Fabio Majo
- Unit of Endocrinology and Diabetes, Bambino Gesù Children's Hospital, Rome, Italy
| | - Maria Chiara Russo
- Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy
| | | | - Angelica Spolzino
- Division of Hematology, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy
| | - Paolo Mosci
- Department of Veterinary Medicine, University of Perugia, Perugia, Italy
| | | | - Franco Aversa
- Division of Hematology, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy
| | - Andrea Velardi
- Institute of Hematology-Centro di Ricerche Emato-Oncologiche, University of Perugia, Perugia, Italy
| | - Luigina Romani
- Department of Experimental Medicine, University of Perugia, Perugia, Italy
| | - Claudio Costantini
- Department of Experimental Medicine, University of Perugia, Perugia, Italy
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32
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Mondanelli G, Iacono A, Carvalho A, Orabona C, Volpi C, Pallotta MT, Matino D, Esposito S, Grohmann U. Amino acid metabolism as drug target in autoimmune diseases. Autoimmun Rev 2019; 18:334-348. [DOI: 10.1016/j.autrev.2019.02.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 10/30/2018] [Indexed: 12/14/2022]
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33
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Tryptophan 2,3-dioxygenase inhibitory activities of tryptanthrin derivatives. Eur J Med Chem 2018; 160:133-145. [DOI: 10.1016/j.ejmech.2018.10.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 10/05/2018] [Accepted: 10/09/2018] [Indexed: 01/21/2023]
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Yamamoto Y, Yamasuge W, Imai S, Kunisawa K, Hoshi M, Fujigaki H, Mouri A, Nabeshima T, Saito K. Lipopolysaccharide shock reveals the immune function of indoleamine 2,3-dioxygenase 2 through the regulation of IL-6/stat3 signalling. Sci Rep 2018; 8:15917. [PMID: 30374077 PMCID: PMC6206095 DOI: 10.1038/s41598-018-34166-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 10/02/2018] [Indexed: 12/20/2022] Open
Abstract
Indoleamine 2,3-dioxygenase 2 (Ido2) is a recently identified catalytic enzyme in the tryptophan-kynurenine pathway that is expressed primarily in monocytes and dendritic cells. To elucidate the biological role of Ido2 in immune function, we introduced lipopolysaccharide (LPS) endotoxin shock to Ido2 knockout (Ido2 KO) mice, which led to higher mortality than that in the wild type (WT) mice. LPS-treated Ido2 KO mice had increased production of inflammatory cytokines (including interleukin-6; IL-6) in serum and signal transducer and activator of transcription 3 (stat3) phosphorylation in the spleen. Moreover, the peritoneal macrophages of LPS-treated Ido2 KO mice produced more cytokines than did the WT mice. By contrast, the overexpression of Ido2 in the murine macrophage cell line (RAW) suppressed cytokine production and decreased stat3 expression. Finally, RAW cells overexpressing Ido2 did not alter nuclear factor κB (NF-κB) or stat1 expression, but IL-6 and stat3 expression decreased relative to the control cell line. These results reveal that Ido2 modulates IL-6/stat3 signalling and is induced by LPS, providing novel options for the treatment of immune disorders.
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MESH Headings
- Animals
- Cytokines/metabolism
- Indoleamine-Pyrrole 2,3,-Dioxygenase/deficiency
- Indoleamine-Pyrrole 2,3,-Dioxygenase/genetics
- Indoleamine-Pyrrole 2,3,-Dioxygenase/metabolism
- Interleukin-6/metabolism
- Kaplan-Meier Estimate
- Kynurenine/metabolism
- Lipopolysaccharides/toxicity
- Macrophages, Peritoneal/cytology
- Macrophages, Peritoneal/drug effects
- Macrophages, Peritoneal/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- RAW 264.7 Cells
- STAT3 Transcription Factor/metabolism
- Shock, Septic/immunology
- Shock, Septic/mortality
- Shock, Septic/pathology
- Signal Transduction
- Suppressor of Cytokine Signaling 3 Protein/metabolism
- T-Lymphocytes/cytology
- T-Lymphocytes/metabolism
- Up-Regulation/drug effects
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Affiliation(s)
- Yasuko Yamamoto
- Department of Disease Control and Prevention, Fujita Health University Graduate School of Health Sciences, Toyoake, 470-1192, Japan.
| | - Wakana Yamasuge
- Department of Disease Control and Prevention, Fujita Health University Graduate School of Health Sciences, Toyoake, 470-1192, Japan
| | - Shinjiro Imai
- School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, 192-0982, Japan
| | - Kazuo Kunisawa
- Advanced Diagnostic System Research Laboratory, Fujita Health University Graduate School of Health Sciences, Toyoake, 470-1192, Japan
| | - Masato Hoshi
- Department of Disease Control and Prevention, Fujita Health University Graduate School of Health Sciences, Toyoake, 470-1192, Japan
| | - Hidetsugu Fujigaki
- Department of Disease Control and Prevention, Fujita Health University Graduate School of Health Sciences, Toyoake, 470-1192, Japan
| | - Akihiro Mouri
- Department of Regulatory Science, Fujita Health University Graduate School of Health Sciences, Toyoake, 470-1192, Japan
| | - Toshitaka Nabeshima
- Advanced Diagnostic System Research Laboratory, Fujita Health University Graduate School of Health Sciences, Toyoake, 470-1192, Japan
- Japanese Drug Organization of Appropriate Use and Research, Nagoya, 468-0069, Japan
- Aino University, Ibaraki, 567-0012, Japan
| | - Kuniaki Saito
- Department of Disease Control and Prevention, Fujita Health University Graduate School of Health Sciences, Toyoake, 470-1192, Japan
- Human Health Sciences, Graduate School of Medicine and Faculty of Medicine, Kyoto University, Kyoto, 606-8507, Japan
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Sharma R, Razdan K, Bansal Y, Kuhad A. Rollercoaster ride of kynurenines: steering the wheel towards neuroprotection in Alzheimer's disease. Expert Opin Ther Targets 2018; 22:849-867. [PMID: 30223691 DOI: 10.1080/14728222.2018.1524877] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Alzheimer's disease (AD) is associated with cerebral cognitive deficits exhibiting two cardinal hallmarks: accruement of extracellular amyloid plaques and intracellular neurofibrillary tangles composed of hyperphosphorylated tau protein. The currently accessible therapeutic armamentarium merely provides symptomatic relief. Therefore, the cry for prospective neuroprotective strategies seems to be the need of the hour. Areas covered: This review comprehensively establishes correlation between kynurenine pathway (KP) metabolites and AD with major emphasis on its two functionally contrasting neuroactive metabolites i.e. kynurenic acid (KYNA) and quinolinic acid (QUIN) and enlists various clinical studies which hold a potential for future therapeutics in AD. Also, major hypotheses of AD and mechanisms underlying them have been scrutinized with the aim to brush up the readers with basic pathology of AD. Expert opinion: KP is unique in itself as it holds two completely different domains i.e. neurotoxic QUIN and neuroprotective KYNA and disrupted equilibrium between the two has a hand in neurodegeneration. KYNA has long been demonstrated to be neuroprotective but lately being disparaged for cognitive side effects. But we blaze a trail by amalgamating the pharmacological mechanistic studies of KYNA in kinship with α7nAChRs, NMDARs and GABA which lends aid in favour of KA.
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Affiliation(s)
- Radhika Sharma
- a Pharmacology Research Laboratory , University Institute of Pharmaceutical Sciences, UGC-Centre of Advanced Study, Panjab University , Chandigarh , India
| | - Karan Razdan
- b Pharmaceutics division , University Institute of Pharmaceutical Sciences, UGC-Centre of Advanced Study, Panjab University , Chandigarh , India
| | - Yashika Bansal
- a Pharmacology Research Laboratory , University Institute of Pharmaceutical Sciences, UGC-Centre of Advanced Study, Panjab University , Chandigarh , India
| | - Anurag Kuhad
- a Pharmacology Research Laboratory , University Institute of Pharmaceutical Sciences, UGC-Centre of Advanced Study, Panjab University , Chandigarh , India
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36
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Grayfer L, Kerimoglu B, Yaparla A, Hodgkinson JW, Xie J, Belosevic M. Mechanisms of Fish Macrophage Antimicrobial Immunity. Front Immunol 2018; 9:1105. [PMID: 29892285 PMCID: PMC5985312 DOI: 10.3389/fimmu.2018.01105] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 05/02/2018] [Indexed: 12/13/2022] Open
Abstract
Overcrowding conditions and temperatures shifts regularly manifest in large-scale infections of farmed fish, resulting in economic losses for the global aquaculture industries. Increased understanding of the functional mechanisms of fish antimicrobial host defenses is an important step forward in prevention of pathogen-induced morbidity and mortality in aquaculture setting. Like other vertebrates, macrophage-lineage cells are integral to fish immune responses and for this reason, much of the recent fish immunology research has focused on fish macrophage biology. These studies have revealed notable similarities as well as striking differences in the molecular strategies by which fish and higher vertebrates control their respective macrophage polarization and functionality. In this review, we address the current understanding of the biological mechanisms of teleost macrophage functional heterogeneity and immunity, focusing on the key cytokine regulators that control fish macrophage development and their antimicrobial armamentarium.
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Affiliation(s)
- Leon Grayfer
- Department of Biological Sciences, George Washington University, Washington, DC, United States
| | - Baris Kerimoglu
- Department of Biological Sciences, George Washington University, Washington, DC, United States
| | - Amulya Yaparla
- Department of Biological Sciences, George Washington University, Washington, DC, United States
| | | | - Jiasong Xie
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
| | - Miodrag Belosevic
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
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37
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Abstract
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. In the past few decades, IDO1 has garnered the most attention as a therapeutic target with great potential in cancer immunotherapy. Many potential inhibitors of IDO1 have been designed, synthesized and evaluated, among which indoximod (d-1-MT), INCB024360, GDC-0919 (formerly NLG-919), and an IDO1 peptide-based vaccine have advanced to the clinical trial stage. However, recently, the roles of TDO and IDO2 have been elucidated in immune suppression. In this review, the current drug discovery landscape for targeting TDO, IDO1 and IDO2 is highlighted, with particular attention to the recent use of drugs in clinical trials. Moreover, the crystal structures of these enzymes, in complex with inhibitors, and the mechanisms of Trp catabolism in the first step, are summarized to provide information for facilitating the discovery of new enzyme inhibitors.
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Affiliation(s)
- Daojing Yan
- Department of Chemistry & Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, China.
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Dostal CR, Gamsby NS, Lawson MA, McCusker RH. Glia- and tissue-specific changes in the Kynurenine Pathway after treatment of mice with lipopolysaccharide and dexamethasone. Brain Behav Immun 2018; 69:321-335. [PMID: 29241670 PMCID: PMC5857427 DOI: 10.1016/j.bbi.2017.12.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 12/09/2017] [Accepted: 12/09/2017] [Indexed: 12/31/2022] Open
Abstract
Behavioral symptoms associated with mood disorders have been intimately linked with immunological and psychological stress. Induction of immune and stress pathways is accompanied by increased tryptophan entry into the Kynurenine (Kyn) Pathway as governed by the rate-limiting enzymes indoleamine/tryptophan 2,3-dioxygenases (DO's: Ido1, Ido2, Tdo2). Indeed, elevated DO expression is associated with inflammation- and stress-related depression symptoms. Here we examined central (brain, astrocyte and microglia) and peripheral (lung, liver and spleen) DO expression in mice treated intraperitoneally with lipopolysaccharide (LPS) and dexamethasone (DEX) to model the response of the Kyn Pathway to inflammation and glucocorticoids. LPS-induced expression of cytokines in peripheral tissues was attenuated by DEX, confirming inflammatory and anti-inflammatory responses, respectively. Increased Kyn levels following LPS and DEX administration verified Kyn Pathway activation. Expression of multiple mRNA isoforms for each DO, which we have shown to be differentially utilized and regulated, were quantified including reference/full-length (FL) and variant (v) transcripts. LPS increased Ido1-FL in brain (∼1000-fold), a response paralleled by increased expression in both astrocytes and microglia. Central Ido1-FL was not changed by DEX; however, LPS-induced Ido1-FL was decreased by DEX in peripheral tissues. In contrast, DEX increased Ido1-v1 expression by astrocytes and microglia, but not peripheral tissues. In comparison, brain Ido2 was minimally induced by LPS or DEX. Uniquely, Ido2-v6 was LPS- and DEX-inducible in astrocytes, suggesting a unique role for astrocytes in response to inflammation and glucocorticoids. Only DEX increased central Tdo2 expression; however, peripheral Tdo2 was upregulated by either LPS or DEX. In summary, specific DO isoforms are increased by LPS and DEX, but LPS-dependent Ido1 and Ido2 induction are attenuated by DEX only in the periphery indicating that elevated DO expression and Kyn production within the brain can occur independent of the periphery. These findings demonstrate a plausible interaction between immune activation and glucocorticoids associated with depression.
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Affiliation(s)
- Carlos R. Dostal
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States,Medical Scholars Program, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States,Integrative Immunology and Behavior Program, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States
| | - Nicolaus S. Gamsby
- School of Earth, Society and Environment, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States
| | - Marcus A. Lawson
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States,Integrative Immunology and Behavior Program, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States,Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States
| | - Robert H. McCusker
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States,Integrative Immunology and Behavior Program, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States,Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States,Department of Pathology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States
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39
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40
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A single amino acid residue regulates the substrate affinity and specificity of indoleamine 2,3-dioxygenase. Arch Biochem Biophys 2017; 640:1-9. [PMID: 29288638 DOI: 10.1016/j.abb.2017.12.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/21/2017] [Accepted: 12/23/2017] [Indexed: 11/20/2022]
Abstract
Indoleamine 2,3-dioxygenase (IDO) is a heme-containing enzyme that catalyses the oxidative cleavage of L-Trp. The ciliate Blepharisma stoltei has four IDO genes (IDO-I, -II, -III and -IV), which seem to have evolved via two sequential gene duplication events. Each IDO enzyme has a distinct enzymatic property, where IDO-III has a high affinity for L-Trp, whereas the affinity of the other three isoforms for L-Trp is low. IDO-I also exhibits a significant catalytic activity with another indole compound: 5-hydroxy-l-tryptophan (5-HTP). IDO-I is considered to be an enzyme that is involved in the biosynthesis of the 5-HTP-derived mating pheromone, gamone 2. By analysing a series of chimeric enzymes based on extant and predicted ancestral enzymes, we identified Asn131 in IDO-I and Glu132 in IDO-III as the key residues responsible for their high affinity for each specific substrate. These two residues were aligned in an identical position as the substrate-determining residue (SDR). Thus, the substrate affinity and specificity are regulated mostly by a single amino acid residue in the Blepharisma IDO-I and IDO-III enzymes.
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41
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Jusof FF, Bakmiwewa SM, Weiser S, Too LK, Metz R, Prendergast GC, Fraser ST, Hunt NH, Ball HJ. Investigation of the Tissue Distribution and Physiological Roles of Indoleamine 2,3-Dioxygenase-2. Int J Tryptophan Res 2017; 10:1178646917735098. [PMID: 29051706 PMCID: PMC5638149 DOI: 10.1177/1178646917735098] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 08/30/2017] [Indexed: 01/11/2023] Open
Abstract
Indoleamine 2,3-dioxygenase-2 (IDO2) is 1 of the 3 enzymes that can catalyze the first step in the kynurenine pathway of tryptophan metabolism. Of the 2 other enzymes, tryptophan 2,3-dioxygenase is highly expressed in the liver and has a role in tryptophan homeostasis, whereas indoleamine 2,3-dioxygenase-1 (IDO1) expression is induced by inflammatory stimuli. Indoleamine 2,3-dioxygenase-2 is reportedly expressed comparatively narrow, including in liver, kidney, brain, and in certain immune cell types, and it does not appear to contribute significantly to systemic tryptophan catabolism under normal physiological conditions. Here, we report the identification of an alternative splicing pattern, including the use of an alternative first exon, that is conserved in the mouse Ido1 and Ido2 genes. These findings prompted us to assess IDO2 protein expression and enzymatic activity in tissues. Our analysis, undertaken in Ido2 +/+ and Ido2−/− mice using immunohistochemistry and measurement of tryptophan and kynurenine levels, suggested an even more restricted pattern of tissue expression than previously reported. We found IDO2 protein to be expressed in the liver with a perinuclear/nuclear, rather than cytoplasmic, distribution. Consistent with earlier reports, we found Ido2 −/− mice to be phenotypically similar to their Ido2+/+ counterparts regarding levels of tryptophan and kynurenine in the plasma and liver. Our findings suggest a specialized function or regulatory role for IDO2 associated with its particular subcellular localization.
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Affiliation(s)
- Felicita F Jusof
- Molecular Immunopathology Unit, Bosch Institute and School of Medical Sciences, The University of Sydney, Camperdown, NSW, Australia.,Department of Physiology, Faculty of Medicine, The University of Malaya, Kuala Lumpur, Malaysia
| | - Supun M Bakmiwewa
- Molecular Immunopathology Unit, Bosch Institute and School of Medical Sciences, The University of Sydney, Camperdown, NSW, Australia
| | - Silvia Weiser
- Molecular Immunopathology Unit, Bosch Institute and School of Medical Sciences, The University of Sydney, Camperdown, NSW, Australia
| | - Lay Khoon Too
- Molecular Immunopathology Unit, Bosch Institute and School of Medical Sciences, The University of Sydney, Camperdown, NSW, Australia
| | | | | | - Stuart T Fraser
- Discipline of Physiology, Bosch Institute and School of Medical Sciences, The University of Sydney, Camperdown, NSW, Australia
| | - Nicholas H Hunt
- Molecular Immunopathology Unit, Bosch Institute and School of Medical Sciences, The University of Sydney, Camperdown, NSW, Australia
| | - Helen J Ball
- Molecular Immunopathology Unit, Bosch Institute and School of Medical Sciences, The University of Sydney, Camperdown, NSW, Australia
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42
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Prendergast GC, Malachowski WJ, Mondal A, Scherle P, Muller AJ. Indoleamine 2,3-Dioxygenase and Its Therapeutic Inhibition in Cancer. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2017; 336:175-203. [PMID: 29413890 PMCID: PMC6054468 DOI: 10.1016/bs.ircmb.2017.07.004] [Citation(s) in RCA: 185] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The tryptophan catabolic enzyme indoleamine 2,3-dioxygenase-1 (IDO1) has attracted enormous attention in driving cancer immunosuppression, neovascularization, and metastasis. IDO1 suppresses local CD8+ T effector cells and natural killer cells and induces CD4+ T regulatory cells (iTreg) and myeloid-derived suppressor cells (MDSC). The structurally distinct enzyme tryptophan dioxygenase (TDO) also has been implicated recently in immune escape and metastatic progression. Lastly, emerging evidence suggests that the IDO1-related enzyme IDO2 may support IDO1-mediated iTreg and contribute to B-cell inflammed states in certain cancers. IDO1 and TDO are upregulated widely in neoplastic cells but also variably in stromal, endothelial, and innate immune cells of the tumor microenviroment and in tumor-draining lymph nodes. Pharmacological and genetic proofs in preclinical models of cancer have validated IDO1 as a cancer therapeutic target. IDO1 inhibitors have limited activity on their own but greatly enhance "immunogenic" chemotherapy or immune checkpoint drugs. IDO/TDO function is rooted in inflammatory programming, thereby influencing tumor neovascularization, MDSC generation, and metastasis beyond effects on adaptive immune tolerance. Discovery and development of two small molecule enzyme inhibitors of IDO1 have advanced furthest to date in Phase II/III human trials (epacadostat and navoximod, respectively). Indoximod, a tryptophan mimetic compound with a different mechanism of action in the IDO pathway has also advanced in multiple Phase II trials. Second generation combined IDO/TDO inhibitors may broaden impact in cancer treatment, for example, in addressing IDO1 bypass (inherent resistance) or acquired resistance to IDO1 inhibitors. This review surveys knowledge about IDO1 function and how IDO1 inhibitors reprogram inflammation to heighten therapeutic responses in cancer.
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Affiliation(s)
- George C Prendergast
- Lankenau Institute for Medical Research, Wynnewood, PA, United States; Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, United States.
| | | | - Arpita Mondal
- Lankenau Institute for Medical Research, Wynnewood, PA, United States; Drexel University College of Medicine, Philadelphia, PA, United States
| | - Peggy Scherle
- Incyte Corporation Inc., Wilmington, DE, United States
| | - Alexander J Muller
- Lankenau Institute for Medical Research, Wynnewood, PA, United States; Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, United States
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Abstract
Specialized adaptations for killing microbes are synonymous with phagocytic cells including macrophages, monocytes, inflammatory neutrophils, and eosinophils. Recent genome sequencing of extant species, however, reveals that analogous antimicrobial machineries exist in certain non-immune cells and also within species that ostensibly lack a well-defined immune system. Here we probe the evolutionary record for clues about the ancient and diverse phylogenetic origins of macrophage killing mechanisms and how some of their properties are shared with cells outside the traditional bounds of immunity in higher vertebrates such as mammals.
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Mondanelli G, Bianchi R, Pallotta MT, Orabona C, Albini E, Iacono A, Belladonna ML, Vacca C, Fallarino F, Macchiarulo A, Ugel S, Bronte V, Gevi F, Zolla L, Verhaar A, Peppelenbosch M, Mazza EMC, Bicciato S, Laouar Y, Santambrogio L, Puccetti P, Volpi C, Grohmann U. A Relay Pathway between Arginine and Tryptophan Metabolism Confers Immunosuppressive Properties on Dendritic Cells. Immunity 2017; 46:233-244. [PMID: 28214225 PMCID: PMC5337620 DOI: 10.1016/j.immuni.2017.01.005] [Citation(s) in RCA: 219] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 11/18/2016] [Accepted: 12/21/2016] [Indexed: 02/07/2023]
Abstract
Arginase 1 (Arg1) and indoleamine 2,3-dioxygenase 1 (IDO1) are immunoregulatory enzymes catalyzing the degradation of l-arginine and l-tryptophan, respectively, resulting in local amino acid deprivation. In addition, unlike Arg1, IDO1 is also endowed with non-enzymatic signaling activity in dendritic cells (DCs). Despite considerable knowledge of their individual biology, no integrated functions of Arg1 and IDO1 have been reported yet. We found that IDO1 phosphorylation and consequent activation of IDO1 signaling in DCs was strictly dependent on prior expression of Arg1 and Arg1-dependent production of polyamines. Polyamines, either produced by DCs or released by bystander Arg1+ myeloid-derived suppressor cells, conditioned DCs toward an IDO1-dependent, immunosuppressive phenotype via activation of the Src kinase, which has IDO1-phosphorylating activity. Thus our data indicate that Arg1 and IDO1 are linked by an entwined pathway in immunometabolism and that their joint modulation could represent an important target for effective immunotherapy in several disease settings. Dendritic cells (DCs) can co-express Arg1 and IDO1 immunosuppressive enzymes Arg1 activity is required for IDO1 induction by TGF-β in DCs Spermidine, a downstream Arg1 product, but not arginine starvation, induces IDO1 in DCs Arg1+ myeloid derived suppressor cells (MDSCs) can render DCs immunosuppressive via IDO1
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Affiliation(s)
- Giada Mondanelli
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy
| | - Roberta Bianchi
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy
| | | | - Ciriana Orabona
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy
| | - Elisa Albini
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy
| | - Alberta Iacono
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy
| | | | - Carmine Vacca
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy
| | - Francesca Fallarino
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy
| | - Antonio Macchiarulo
- Department of Pharmaceutical Sciences, University of Perugia, 06132 Perugia, Italy
| | - Stefano Ugel
- Department of Medicine, Verona University Hospital, 37134 Verona, Italy
| | - Vincenzo Bronte
- Department of Medicine, Verona University Hospital, 37134 Verona, Italy
| | - Federica Gevi
- Department of Ecological and Biological Sciences, University of Tuscia, 01100 Viterbo, Italy
| | - Lello Zolla
- Department of Ecological and Biological Sciences, University of Tuscia, 01100 Viterbo, Italy
| | - Auke Verhaar
- Department of Gastroenterology and Hepatology, Erasmus MC-University Medical Centre Rotterdam, 3015 CE Rotterdam, the Netherlands
| | - Maikel Peppelenbosch
- Department of Gastroenterology and Hepatology, Erasmus MC-University Medical Centre Rotterdam, 3015 CE Rotterdam, the Netherlands
| | | | - Silvio Bicciato
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Yasmina Laouar
- Department of Microbiology & Immunology, University of Michigan School of Medicine, Ann Arbor, MI 48109-5620, US
| | - Laura Santambrogio
- Department of Pathology, Albert Einstein College of Medicine, New York, NY 10461, US
| | - Paolo Puccetti
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy
| | - Claudia Volpi
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy.
| | - Ursula Grohmann
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy.
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45
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Fujigaki H, Yamamoto Y, Saito K. L-Tryptophan-kynurenine pathway enzymes are therapeutic target for neuropsychiatric diseases: Focus on cell type differences. Neuropharmacology 2017; 112:264-274. [DOI: 10.1016/j.neuropharm.2016.01.011] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 12/28/2015] [Accepted: 01/05/2016] [Indexed: 12/31/2022]
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46
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Cortés J, Alvarez C, Santana P, Torres E, Mercado L. Indoleamine 2,3-dioxygenase: First evidence of expression in rainbow trout (Oncorhynchus mykiss). DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2016; 65:73-78. [PMID: 27370975 DOI: 10.1016/j.dci.2016.06.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 06/26/2016] [Accepted: 06/26/2016] [Indexed: 06/06/2023]
Abstract
The role of enzymes as active antimicrobial agents of the innate immunity in teleost fish is proposed in diverse works. Secretion of Indoleamine 2,3-dioxygenase (IDO) has been described in higher vertebrates; it degrades l-tryptophan in extracellular environments associated mainly with mucosal organs. The effect of IDO on decreasing amino acid concentration may inhibit the growth of potential pathogens. In fish the study of this molecule is still. Here we report the identification of an Onchorhyncus mykiss IDO homologue (OmIDO). IDO was cloned, sequenced, and the primary structure shows conservation of key functional sites. The constitutive expression is altered when the fish is challenged with LPS as a pathogen-associated molecular pattern (PAMPs). Up-regulation of IDO was shown preferentially in the fish's mucosal cells. In order to obtain evidence of a possible regulation mechanism, an in vitro cell model was used for to show that OmIDO is induced by rIFN. These study has identified a Indoleamine 2,3-dyoxigenase in O. mykiss will contribute to expands our knowledge of the function this protein in fish immune response. These findings allow to propose the use of OmIDO as a molecular indicator of strength of the animal's immune response and wellbeing.
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Affiliation(s)
- Jimena Cortés
- Grupo de Marcadores Inmunológicos, Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.
| | - Claudio Alvarez
- Grupo de Marcadores Inmunológicos, Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile; Programa de Doctorado en Biotecnología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile; Universidad Técnica Federico Santa María, Valparaíso, Chile.
| | - Paula Santana
- Grupo de Marcadores Inmunológicos, Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.
| | - Elisa Torres
- Grupo de Marcadores Inmunológicos, Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.
| | - Luis Mercado
- Grupo de Marcadores Inmunológicos, Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.
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Larkin PB, Sathyasaikumar KV, Notarangelo FM, Funakoshi H, Nakamura T, Schwarcz R, Muchowski PJ. Tryptophan 2,3-dioxygenase and indoleamine 2,3-dioxygenase 1 make separate, tissue-specific contributions to basal and inflammation-induced kynurenine pathway metabolism in mice. BIOCHIMICA ET BIOPHYSICA ACTA 2016; 1860:2345-2354. [PMID: 27392942 PMCID: PMC5808460 DOI: 10.1016/j.bbagen.2016.07.002] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 06/25/2016] [Accepted: 07/04/2016] [Indexed: 01/06/2023]
Abstract
BACKGROUND In mammals, the majority of the essential amino acid tryptophan is degraded via the kynurenine pathway (KP). Several KP metabolites play distinct physiological roles, often linked to immune system functions, and may also be causally involved in human diseases including neurodegenerative disorders, schizophrenia and cancer. Pharmacological manipulation of the KP has therefore become an active area of drug development. To target the pathway effectively, it is important to understand how specific KP enzymes control levels of the bioactive metabolites in vivo. METHODS Here, we conducted a comprehensive biochemical characterization of mice with a targeted deletion of either tryptophan 2,3-dioxygenase (TDO) or indoleamine 2,3-dioxygenase (IDO), the two initial rate-limiting enzymes of the KP. These enzymes catalyze the same reaction, but differ in biochemical characteristics and expression patterns. We measured KP metabolite levels and enzyme activities and expression in several tissues in basal and immune-stimulated conditions. RESULTS AND CONCLUSIONS Although our study revealed several unexpected downstream effects on KP metabolism in both knockout mice, the results were essentially consistent with TDO-mediated control of basal KP metabolism and a role of IDO in phenomena involving stimulation of the immune system.
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Affiliation(s)
- Paul B Larkin
- Gladstone Institute of Neurological Disease, San Francisco, CA, USA; Neuroscience Graduate Program, University of California, San Francisco, CA, USA
| | - Korrapati V Sathyasaikumar
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Francesca M Notarangelo
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Hiroshi Funakoshi
- Center for Advanced Research and Education (CARE), Asahikawa Medical University, 1-1-1- Higashinijo Midorigaoka, Asahikawa 078-8510, Japan
| | | | - Robert Schwarcz
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Paul J Muchowski
- Gladstone Institute of Neurological Disease, San Francisco, CA, USA; Neuroscience Graduate Program, University of California, San Francisco, CA, USA; Department of Biochemistry and Biophysics, University of California, San Francisco, CA, USA; Department of Neurology, University of California, San Francisco, CA, USA; The Taube-Koret Center for Huntington's Disease Research, San Francisco, CA, USA.
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Li J, Li Y, Yang D, Hu N, Guo Z, Kuang C, Yang Q. Establishment of a human indoleamine 2, 3-dioxygenase 2 (hIDO2) bioassay system and discovery of tryptanthrin derivatives as potent hIDO2 inhibitors. Eur J Med Chem 2016; 123:171-179. [DOI: 10.1016/j.ejmech.2016.07.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 06/03/2016] [Accepted: 07/07/2016] [Indexed: 11/29/2022]
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Yuasa HJ. Highl-Trp affinity of indoleamine 2,3-dioxygenase 1 is attributed to two residues located in the distal heme pocket. FEBS J 2016; 283:3651-3661. [DOI: 10.1111/febs.13834] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 05/31/2016] [Accepted: 08/12/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Hajime J. Yuasa
- Laboratory of Biochemistry; Department of Applied Science; Faculty of Science; National University Corporation Kochi University; Japan
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Ueland PM, McCann A, Midttun Ø, Ulvik A. Inflammation, vitamin B6 and related pathways. Mol Aspects Med 2016; 53:10-27. [PMID: 27593095 DOI: 10.1016/j.mam.2016.08.001] [Citation(s) in RCA: 199] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 08/27/2016] [Indexed: 12/11/2022]
Abstract
The active form of vitamin B6, pyridoxal 5'-phosphate (PLP), serves as a co-factor in more than 150 enzymatic reactions. Plasma PLP has consistently been shown to be low in inflammatory conditions; there is a parallel reduction in liver PLP, but minor changes in erythrocyte and muscle PLP and in functional vitamin B6 biomarkers. Plasma PLP also predicts the risk of chronic diseases like cardiovascular disease and some cancers, and is inversely associated with numerous inflammatory markers in clinical and population-based studies. Vitamin B6 intake and supplementation improve some immune functions in vitamin B6-deficient humans and experimental animals. A possible mechanism involved is mobilization of vitamin B6 to the sites of inflammation where it may serve as a co-factor in pathways producing metabolites with immunomodulating effects. Relevant vitamin B6-dependent inflammatory pathways include vitamin B6 catabolism, the kynurenine pathway, sphingosine 1-phosphate metabolism, the transsulfuration pathway, and serine and glycine metabolism.
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Affiliation(s)
- Per Magne Ueland
- Department of Clinical Science, University of Bergen, 5021 Bergen, Norway; Laboratory of Clinical Biochemistry, Haukeland University Hospital, 5021 Bergen, Norway.
| | | | | | - Arve Ulvik
- Bevital A/S, Laboratoriebygget, 5021 Bergen, Norway
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