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Baer SL, Colombo RE, Johnson MH, Wakade S, Pacholczyk G, Newman-Whitlow C, Thompson SA, Saag MS, Martin JN, Floris-Moore M, Huang L, Mellor AL. Indoleamine 2,3 dioxygenase, age, and immune activation in people living with HIV. J Investig Med 2021; 69:1238-1244. [PMID: 33875612 DOI: 10.1136/jim-2021-001794] [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] [Accepted: 03/23/2021] [Indexed: 11/03/2022]
Abstract
Immune activation complicates HIV despite antiretroviral therapy (ART). Indoleamine 2,3 dioxygenase (IDO) catabolizes tryptophan (T) to kynurenine (K), regulating immune activity, and IDO activity increases with age. This study examines the relationship of IDO activity, bacterial translocation, and aging in people living with HIV (PLWH) on ART. Samples and data from PLWH on ART from the Centers for AIDS Research Network of Integrated Clinical Systems and from matched HIV-uninfected patients (controls) from the Multicenter AIDS Cohort Study and the Women's Interagency HIV Study were analyzed. The ratio of K to T (K:T) and neopterin were indicators of inflammation; 16S ribosomal DNA (16S rDNA) and lipopolysaccharide (LPS) were markers of bacterial translocation. Samples and data from 205 PLWH and 99 controls were analyzed. PLWH had higher K:T values across all ages, with a significant relationship between age and K:T for both groups. CD4 count or CD4 nadir had no association with K:T. There was no positive association between level of 16S rDNA or LPS detection and K:T. K:T and neopterin were associated. PLWH had elevated IDO activity, at younger ages, despite ART. This study suggests K:T ratio increases with age in both groups and is elevated in PLWH at all ages compared with age-matched controls.
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Affiliation(s)
- Stephanie L Baer
- Infection Control, Charlie Norwood VA Medical Center, Augusta, Georgia, USA .,Department of Medicine, Augusta University, Augusta, Georgia, USA
| | - Rhonda E Colombo
- Department of Medicine, Augusta University, Augusta, Georgia, USA.,Infectious Disease Clinical Research Program, Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.,Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc, Bethesda, Maryland, USA
| | - Maribeth H Johnson
- Department of Neuroscience and Regenerative Medicine, Augusta University, Augusta, Georgia, USA
| | - Sushama Wakade
- Department of Medicine, Augusta University, Augusta, Georgia, USA
| | | | | | | | - Michael S Saag
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jeffrey N Martin
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California, USA
| | - Michelle Floris-Moore
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Lei Huang
- Institute of Cellular Medicine, Faculty of Medical Science, Newcastle University, Newcastle upon Tyne, UK.,Immunotherapy Discovery Institute, Augusta University, Augusta, Georgia, USA
| | - Andrew L Mellor
- Institute of Cellular Medicine, Faculty of Medical Science, Newcastle University, Newcastle upon Tyne, UK.,Immunotherapy Discovery Institute, Augusta University, Augusta, Georgia, USA
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Sodium Sulfite Exacerbates Allograft Vasculopathy and Affects Tryptophan Breakdown in Murine Heterotopic Aortic Transplantation. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:8461048. [PMID: 31089419 PMCID: PMC6476130 DOI: 10.1155/2019/8461048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 02/27/2019] [Indexed: 12/30/2022]
Abstract
Graft vasculopathy is the main feature of chronic rejection in organ transplantation, with oxidative stress being a major trigger. Inflammation-associated prooxidant processes may be controlled by antioxidants; however, interference with redox-regulated mechanisms is a complex endeavor. An essential feature of the cellular immune response is the acceleration of tryptophan (Trp) breakdown, leading to the formation of several bioactive catabolites. Long-term activation of this immunobiochemical pathway contributes to the establishment of a tolerogenic environment, thereby supporting allograft survival. Herein, the impact of the antioxidant sodium sulfite on the development of graft vasculopathy was assessed in murine aortic transplantation. Allogeneic (BALB/c to C57BL/6) heterotopic murine aortic transplantations were performed. Animals were left untreated or were treated with 10 μl of 0.1 M, of 0.01 M sodium sulfite, or of 0.1 M sodium sulfate, intraperitoneally once/day, until postoperative day (POD) 100. Grafts were assessed by histology, immunohistochemistry, and adhesion molecule gene expression. Serum concentrations of tryptophan and its catabolite kynurenine (Kyn) were measured. On day 100, graft vasculopathy was significantly increased upon treatment with 0.1 M sodium sulfite, compared to allogeneic untreated controls (p = 0.004), which correlated with a significant increase of α-smooth-muscle-actin, Vcam-1, and P-selectin. Serum Kyn concentrations increased in the allogeneic control group over time (p < 0.05, POD ≥ 50), while low-dose sodium sulfite treatment (0.01 M) treatment resulted in a decrease in Kyn levels over time (p < 0.05, POD ≥ 10), compared to the respective baselines (p < 0.05). Longitudinal analysis of serum metabolite concentrations in the different treatment groups further identified an overall effect of sodium sulfite on Kyn concentrations. Antioxidative treatment may result in ambivalent consequences. Our data reveal that an excess of antioxidants like sodium sulfite can aggravate allograft vasculopathy, which further highlights the challenges associated with interventions that interfere with the complex interplay of redox-regulated inflammatory processes.
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Wang Y, Merchen TD, Fang X, Lassiter R, Ho CS, Jajosky R, Kleven D, Thompson T, Mohamed E, Yu M, Waller JL, Nahman NS. Regulation of indoleamine 2,3 dioxygenase and its role in a porcine model of acute kidney allograft rejection. J Investig Med 2018; 66:1109-1117. [PMID: 30006478 DOI: 10.1136/jim-2018-000742] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/08/2018] [Indexed: 12/21/2022]
Abstract
In kidney transplantation acute allograft rejection is the most common cause of late allograft loss. Changes in indoleamine 2,3 dioxygenase (IDO) activity, which catabolizes the degradation of tryptophan to kynurenine, may predict rejection. However, exogenous IDO is immunosuppressive in rodent kidney transplantation. Thus, the increase in IDO activity observed in acute allograft rejection is insufficient to prevent rejection. To address this question, we assessed the regulation of IDO and its role in acute rejection in a porcine model of kidney transplant. In tissue samples from rejecting kidney allografts, we showed a 13-fold increase in IDO gene transcription and 20-fold increase in IDO enzyme activity when compared with autotransplanted kidneys. Allografts also demonstrated an over fourfold increase in tissue interferon (IFN)-γ, with marked increases in tumor necrosis factor (TNF)-α, TNF-β and interleukin 1β. Gene transcription and protein levels of kynurenine 3-monooxygenase (KMO) were decreased. KMO generates the immunosuppressive kynurenine, 3-hydroxykynurenine. The results of these studies demonstrate a clear association between rejection and increased allograft IDO expression, likely driven in part by IFN-γ and facilitated by other cytokines of the allogeneic response. Moreover, the loss of downstream enzymatic activity in the IDO metabolic pathway may suggest novel mechanisms for the perpetuation of rejection.
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Affiliation(s)
- Youli Wang
- Department of Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia, USA
| | - Todd D Merchen
- Department of Surgery, Medical College of Georgia at Augusta University, Augusta, Georgia, USA
| | - Xuexiu Fang
- Department of Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia, USA
| | - Randi Lassiter
- Department of Surgery, Medical College of Georgia at Augusta University, Augusta, Georgia, USA
| | - Chak-Sum Ho
- Gift of Life Michigan, Ann Arbor, Michigan, USA
| | - Ryan Jajosky
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, Georgia, USA
| | - Daniel Kleven
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, Georgia, USA
| | - Thomas Thompson
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, Georgia, USA
| | - Eslam Mohamed
- Department of Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia, USA
| | - Miao Yu
- Department of Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia, USA
| | - Jennifer L Waller
- Department of Population Health Sciences, Medical College of Georgia at Augusta University, Augusta, Georgia, USA
| | - N Stanley Nahman
- Department of Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia, USA.,Medicine, Charlie Norwood VAMC, Augusta, Georgia, USA
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Dugast E, David G, Oger R, Danger R, Judor JP, Gagne K, Chesneau M, Degauque N, Soulillou JP, Paul P, Picard C, Guerif P, Conchon S, Giral M, Gervois N, Retière C, Brouard S. Broad Impairment of Natural Killer Cells from Operationally Tolerant Kidney Transplanted Patients. Front Immunol 2017; 8:1721. [PMID: 29312288 PMCID: PMC5732263 DOI: 10.3389/fimmu.2017.01721] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 11/21/2017] [Indexed: 01/10/2023] Open
Abstract
The role of natural killer (NK) cells in organ transplantation is controversial. This study aims to decipher their role in kidney transplant tolerance in humans. Previous studies highlighted several modulated genes involved in NK cell biology in blood from spontaneously operationally tolerant patients (TOLs; drug-free kidney-transplanted recipients with stable graft function). We performed a phenotypic, functional, and genetic characterization of NK cells from these patients compared to kidney-transplanted patients with stable graft function under immunosuppression and healthy volunteers (HVs). Both operationally TOLs and stable patients harbored defective expression of the NKp46 activator receptor and lytic molecules perforin and granzyme compared to HVs. Surprisingly, NK cells from operationally TOLs also displayed decreased expression of the CD16 activating marker (in the CD56Dim NK cell subset). This decrease was associated with impairment of their functional capacities upon stimulation, as shown by lower interferon gamma (IFNγ) production and CD107a membranous expression in a reverse antibody-dependent cellular cytotoxicity (ADCC) assay, spontaneous lysis assays, and lower target cell lysis in the 51Cr release assay compared to HVs. Conversely, despite impaired K562 cell lysis in the 51Cr release assay, patients with stable graft function harbored a normal reverse ADCC and even increased amounts of IFNγ+ NK cells in the spontaneous lysis assay. Altogether, the strong impairment of the phenotype and functional cytotoxic capacities of NK cells in operationally TOLs may accord with the establishment of a pro-tolerogenic environment, despite remaining highly activated after transplantation in patients with stable graft function.
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Affiliation(s)
- Emilie Dugast
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France.,Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | - Gaëlle David
- Etablissement Français du sang, Nantes, France.,CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France
| | - Romain Oger
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France
| | - Richard Danger
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France.,Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | - Jean-Paul Judor
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France.,Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | - Katia Gagne
- Etablissement Français du sang, Nantes, France.,CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France.,LabEx Transplantex, Université de Strasbourg, France
| | - Mélanie Chesneau
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France.,Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | - Nicolas Degauque
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France.,Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | | | - Pascale Paul
- Nephrology Dialysis Renal Transplantation Center, Assistance Publique des Hôpitaux de Marseille, Hospital de la Conception, UMR 1076, Vascular Research Center of Marseille, INSERM, Aix-Marseille University, Marseille, France
| | - Christophe Picard
- Établissement Français du Sang Alpes Méditerranée, Marseille, France.,ADES UMR 7268, CNRS, EFS, Aix-Marseille Université, Marseille, France
| | - Pierrick Guerif
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France.,Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France.,CIC Biotherapy, CHU Nantes, Nantes, France
| | - Sophie Conchon
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France.,Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | - Magali Giral
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France.,Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France.,CIC Biotherapy, CHU Nantes, Nantes, France
| | - Nadine Gervois
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France
| | - Christelle Retière
- Etablissement Français du sang, Nantes, France.,CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France
| | - Sophie Brouard
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France.,Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
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Abstract
PURPOSE OF REVIEW To highlight some of the recent developments in the novel field of immunometabolism and the therapeutic potential of the many regulatory components of this immunometabolic network for transplantation. RECENT FINDINGS In response to cytokines, changes in nutrients, and other alterations in the local milieu, immune cells are capable of changing their internal metabolic pathways to meet their energy demands. Recent studies demonstrate that activated T effectors (Th1 and Th17) are supported by aerobic glycolysis, whereas regulatory T cells and CD8 memory T cells favor fatty acid oxidation and lipid biosynthesis through mitochondrial oxidative phosphorylation. These bioenergetic processes are dependent upon the activation of metabolic sensors such as mammalian target of rapamycin and AMP-activated protein kinase, respectively, indicating that the cross-talk between immunity and metabolism can shape the fate and function of immune cells. Finally, exciting new studies suggest that differences in the bioenergetic mechanisms within the various immune subsets may selectively be exploited for regulating the immune responses. SUMMARY In this review, we will discuss the metabolic signatures adopted by various immune cells during tolerance versus immunity and the promising avenues that can be modulated by targeting metabolic pathways with either nutrition or pharmacological intervention for establishing long-term transplantation tolerance.
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6
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Liang GB, Luo GH, Bao DS, Chen AJ, Zhuang YX, Guo YN, Wang X, Wang YL, Chen ZP, Lu YP, Li YP. Impact of immunosuppressive agents on the expression of indoleamine 2,3-dioxygenase, heme oxygenase-1 and interleukin-7 in mesangial cells. Mol Med Rep 2015; 12:2577-83. [PMID: 25936769 PMCID: PMC4464319 DOI: 10.3892/mmr.2015.3713] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2014] [Accepted: 12/12/2014] [Indexed: 02/05/2023] Open
Abstract
Chronic allograft nephropathy (CAN) is a major cause of graft loss following kidney transplantation and may result from the interactions of various immune and non-immune factors. The aim of the present study was to establish an in vitro model of glomerular mesangial cell injury in order to examine the gene expression levels of indoleamine 2,3-dioxygenase (IDO), heme oxygenase-1 (HO-1) and interleukin-7 (IL-7) in mesangial cells during the healing process as well as to investigate the effects of various immunosuppressants on the expression of these genes. The HBZY-1 glomerular mesangial cell line was pre-treated in vitro with cytochalasin B for 2 h to induce reversible damage. Following the pre-treatment, the HBZY-1 cells were divided into five groups: Blank control group, cyclosporine A (CsA) group, tacrolimus (Tac) group, mycophenolate mofetil (MMF) group and rapamycin (RAPA) group. After treating the mesangial cells with each immunosuppressive drug for 6, 12 or 24 h, the mRNA and protein expression levels of IDO, HO-1 and IL-7 were examined using reverse transcription quantitative polymerase chain reaction (RT-qPCR), western blot and immunohistochemical analyses. The results showed that expression levels of HO-1 were significantly upregulated in response to treatment with CsA, FK506, RAPA and MMF, whereas the expression levels of IL-7 were markedly downregulated by treatment with the above immunosuppressants. CsA, FK506 and MMF significantly enhanced the expression levels of IDO, whereas RAPA exhibited no apparent effect on IDO. The present study may contribute to the understanding of the pathogenesis of CAN and provide novel strategies for the prevention and treatment of CAN.
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Affiliation(s)
- Guo-Biao Liang
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou 563003, P.R. China
| | - Guang-Heng Luo
- Department of Urology, Guizhou Provincial People's Hospital, Guiyang, Guizhou 550005, P.R. China
| | - Ding-Su Bao
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou 563003, P.R. China
| | - An-Jian Chen
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou 563003, P.R. China
| | - Yong-Xiang Zhuang
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou 563003, P.R. China
| | - Ya-Nan Guo
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou 563003, P.R. China
| | - Xin Wang
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou 563003, P.R. China
| | - Yuan-Liang Wang
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou 563003, P.R. China
| | - Zong-Ping Chen
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou 563003, P.R. China
| | - Yi-Ping Lu
- Department of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - You-Ping Li
- Transplantation Immunology Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
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7
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Role of the immunogenic and tolerogenic subsets of dendritic cells in multiple sclerosis. Mediators Inflamm 2015; 2015:513295. [PMID: 25705093 PMCID: PMC4325219 DOI: 10.1155/2015/513295] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Revised: 01/01/2015] [Accepted: 01/01/2015] [Indexed: 12/13/2022] Open
Abstract
Multiple sclerosis (MS) is an immune-mediated disorder in the central nervous system (CNS) characterized by inflammation and demyelination as well as axonal and neuronal degeneration. So far effective therapies to reverse the disease are still lacking; most therapeutic drugs can only ameliorate the symptoms or reduce the frequency of relapse. Dendritic cells (DCs) are professional antigen presenting cells (APCs) that are key players in both mediating immune responses and inducing immune tolerance. Increasing evidence indicates that DCs contribute to the pathogenesis of MS and might provide an avenue for therapeutic intervention. Here, we summarize the immunogenic and tolerogenic roles of DCs in MS and review medicinal drugs that may affect functions of DCs and have been applied in clinic for MS treatment. We also describe potential therapeutic molecules that can target DCs by inducing anti-inflammatory cytokines and inhibiting proinflammatory cytokines in MS.
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8
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Khasawneh EA, Gupta S, Tuli SY, Shahlaee AH, Garrett TJ, Schechtman KB, Dharnidharka VR. Stable pediatric kidney transplant recipients run higher urine indoleamine 2, 3 dioxygenase (IDO) levels than healthy children. Pediatr Transplant 2014; 18:254-7. [PMID: 24483723 PMCID: PMC3981946 DOI: 10.1111/petr.12232] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/20/2013] [Indexed: 11/30/2022]
Abstract
Immune cells utilize the IDO enzymatic conversion of trp to kyn to determine T-cell activation vs. anergy/apoptosis. In prior studies, urine IDO levels were higher in rejecting renal allografts than in stable state. However, urine IDO levels in healthy subjects or children are unknown. As a corollary to a larger longitudinal and prospective study of serum and urine IDO levels for transplant immune monitoring, here, we analyzed the difference between urine IDO levels in stable post-transplant vs. healthy children. IDO levels were measured by tandem mass spectrometry and expressed as kyn/trp ratios. We compared one-time urine samples, from 34 well children at general pediatric clinics, to the first-month post-transplant urine samples from 18 children, while in stable state (no acute rejection or major infection event in next 30 days). Urine kyn/trp ratios were significantly higher in stable children in first-month post-kidney transplant (median 16.6, range 3.9-44.0) vs. healthy children (median 9.2, range 3.51-17.0; p = 0.0057 by nonparametric Mann-Whitney test). Higher urine IDO levels even with stable transplant suggest a continuous ongoing low-grade allorecognition/inflammatory process. Our data also provide baseline urine IDO levels in healthy subjects for use in future studies.
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Affiliation(s)
- Eihab Al Khasawneh
- College of Medicine, University of Florida, Gainesville, FL, United States
| | - Sushil Gupta
- College of Medicine, University of Florida, Gainesville, FL, United States
| | - Sanjeev Y Tuli
- College of Medicine, University of Florida, Gainesville, FL, United States
| | - Amir H. Shahlaee
- College of Medicine, University of Florida, Gainesville, FL, United States,Division of Allergy, Immunology and Rheumatology, Department of Pediatrics, Georgia Regents University, United States
| | - Timothy J Garrett
- College of Medicine, University of Florida, Gainesville, FL, United States
| | | | - Vikas R Dharnidharka
- College of Medicine, University of Florida, Gainesville, FL, United States,Washington University School of Medicine, St Louis, MO, United States
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9
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Verification of association of elevated serum IDO enzyme activity with acute rejection and low CD4-ATP levels with infection. Transplantation 2013; 96:567-72. [PMID: 23823655 DOI: 10.1097/tp.0b013e31829c7cec] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Both acute rejection (AR) and major infection events (MIE) can reduce long-term allograft survival. We assessed the simultaneous efficacy of serum and urine biomarker indoleamine 2,3-dioxygenase (IDO) enzyme activity and peripheral blood CD4-ATP levels for AR and MIE association, respectively. METHODS We prospectively tested 217 blood and 167 urine serial samples, collected monthly for 12 months after transplantation from 29 consecutive children receiving a kidney transplant. The indoleamine 2,3-dioxygenase activity was assessed by mass spectrometry assays using the ratio of product L-kynurenine (kyn) to substrate tryptophan (trp). Kyn/trp ratios and blood CD4 T-cell ATP levels were correlated with AR, MIE, or stable group (no events) in the next 30 days. RESULTS Using absolute cutoffs and allocating to samples to AR, MIE, or stable group, mean serum kyn/trp ratios were significantly elevated in the group that experienced AR (P=0.0007). Similarly, peripheral blood CD4-ATP levels were significantly lower in the group experiencing MIE (P=0.0351). Urine kyn/trp ratios and blood tacrolimus levels were not different between AR and stable groups. Within-subject analyses, accounting for repeated measures in subjects, also showed that, over time, serum kyn/trp ratios were higher before AR (P=0.031) and blood CD4-ATP levels were lower before MIE (P=0.008). CONCLUSIONS These results from our pilot discovery group suggest that a panel of biomarkers together can predict overimmunosuppression or underimmunosuppression. Further independent validation in a multicenter cohort is suggested.
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10
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Dürr S, Kindler V. Implication of indolamine 2,3 dioxygenase in the tolerance toward fetuses, tumors, and allografts. J Leukoc Biol 2013; 93:681-7. [DOI: 10.1189/jlb.0712347] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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11
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Carvalho A, Cunha C, Bozza S, Moretti S, Massi-Benedetti C, Bistoni F, Aversa F, Romani L. Immunity and tolerance to fungi in hematopoietic transplantation: principles and perspectives. Front Immunol 2012; 3:156. [PMID: 22707953 PMCID: PMC3374351 DOI: 10.3389/fimmu.2012.00156] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Accepted: 05/25/2012] [Indexed: 12/30/2022] Open
Abstract
Resistance and tolerance are two complementary host defense mechanisms that increase fitness in response to low-virulence fungi. Resistance is meant to reduce pathogen burden during infection through innate and adaptive immune mechanisms, whereas tolerance mitigates the substantial cost of resistance to host fitness through a multitude of anti-inflammatory mechanisms, including immunological tolerance. In experimental fungal infections, both defense mechanisms are activated through the delicate equilibrium between Th1/Th17 cells, which provide antifungal resistance, and regulatory T cells limiting the consequences of the ensuing inflammatory pathology. Indoleamine 2,3-dioxygenase (IDO), a rate-limiting enzyme in the tryptophan catabolism, plays a key role in induction of tolerance against fungi. Both hematopoietic and non-hematopoietic compartments contribute to the resistance/tolerance balance against Aspergillus fumigatus via the involvement of selected innate receptors converging on IDO. Several genetic polymorphisms in pattern recognition receptors influence resistance and tolerance to fungal infections in human hematopoietic transplantation. Thus, tolerance mechanisms may be exploited for novel diagnostics and therapeutics against fungal infections and diseases.
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Affiliation(s)
- Agostinho Carvalho
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia Perugia, Italy
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12
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Jui HY, Lin CH, Hsu WT, Liu YR, Hsu RB, Chiang BL, Tseng WYI, Chen MF, Wu KK, Lee CM. Autologous mesenchymal stem cells prevent transplant arteriosclerosis by enhancing local expression of interleukin-10, interferon-γ, and indoleamine 2,3-dioxygenase. Cell Transplant 2012; 21:971-84. [PMID: 22449499 DOI: 10.3727/096368911x627525] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Transplant arteriosclerosis (TA) remains the major limitation of long-term graft survival in heart transplantation despite the advances in immunosuppressants. Mesenchymal stem cells (MSCs) have been demonstrated to suppress allogeneic immune responses by numerous in vitro studies. However, the immunomodulatory effects of MSCs in vivo are controversial and the underlying molecular mechanisms are not conclusive. In this study, we investigated the therapeutic potential of autologous bone marrow-derived MSCs on TA in a porcine model of femoral artery transplantation. MSCs or saline were injected into the soft tissue surrounding the arterial grafts immediately postanastomosis. Four weeks after transplantation, neointimal formation increased significantly in untreated allografts compared with the MSC-treated grafts as assessed by intravascular ultrasound (maximum luminal area stenosis: 40 ± 12% vs. 18 ± 6%, p < 0.001). Grafts harvested at 4 weeks showed dense perivascular lymphocyte infiltration accompanied by significant intimal hyperplasia in the untreated but not in the MSC-treated allografts. Serial angiographic examination showed that all of the untreated allografts became occluded at the 8th week whereas the majority of the MSC-treated grafts remained patent at the 12th week posttransplantation (n = 12 each group, p < 0.001). Quantitative PCR analysis revealed that Foxp3 expression was comparable between the untreated and the MSC-treated groups. However, expression of interleukin-10 (IL-10), interferon-γ (IFN-γ), and indoleamine 2,3-dioxygenase (IDO) was increased significantly in the MSC-treated allografts compared with that in the allograft controls (p = 0.021 for IL-10, p = 0.003 for IFN-γ, and p = 0.008 for IDO). In conclusion, local delivery of autologous MSCs alleviates TA by inducing allograft tolerance via enhanced expression of IL-10, IFN-γ, and IDO but not Foxp3-positive cells in the vessel wall. These results suggest that MSCs induce immune tolerance by activating the type 1 regulatory T-like cells.
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Affiliation(s)
- Hsiang-Yiang Jui
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
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13
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Kushwah R, Hu J. Role of dendritic cells in the induction of regulatory T cells. Cell Biosci 2011; 1:20. [PMID: 21711933 PMCID: PMC3125210 DOI: 10.1186/2045-3701-1-20] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Accepted: 05/24/2011] [Indexed: 12/12/2022] Open
Abstract
Dendritic cells (DCs) play a key role in initiating immune responses and maintaining immune tolerance. In addition to playing a role in thymic selection, DCs play an active role in tolerance under steady state conditions through several mechanisms which are dependent on IL-10, TGF-β, retinoic acid, indoleamine-2,3,-dioxygenase along with vitamin D. Several of these mechanisms are employed by DCs in induction of regulatory T cells which are comprised of Tr1 regulatory T cells, natural and inducible foxp3+ regulatory T cells, Th3 regulatory T cells and double negative regulatory T cells. It appears that certain DC subsets are highly specialized in inducing regulatory T cell differentiation and in some tissues the local microenvironment plays a role in driving DCs towards a tolerogenic response. In this review we discuss the recent advances in our understanding of the mechanisms underlying DC driven regulatory T cell induction.
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Affiliation(s)
- Rahul Kushwah
- Physiology and Experimental Medicine Research Program, Hospital for Sick Children, 555 University Avenue, Toronto, Ontario, M5G 1X8, Canada.
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14
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Dharnidharka VR, Gupta S, Khasawneh EA, Haafiz A, Shuster JJ, Theriaque DW, Shahlaee AH, Garrett TJ. Immune biomarker panel monitoring utilizing IDO enzyme activity and CD4 ATP levels: prediction of acute rejection vs. viral replication events. Pediatr Transplant 2011; 15:321-8. [PMID: 21492353 PMCID: PMC3078420 DOI: 10.1111/j.1399-3046.2011.01485.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Infections have become as important an event as acute rejection posttransplant for long-term allograft survival. Less invasive biomarkers tested so far predict risk for one event or the other, not both. We prospectively tested blood and urine monthly for 12 months posttransplant from children receiving a kidney transplant. The IDO enzyme pathway was assessed by MS assays using the ratio of product l-kyn to substrate trp. Kyn/trp ratios and blood CD4 T-cell ATP levels were correlated with acute rejection or major infection events or stable group (no events) in the next 30 days. The 25 subjects experienced six discrete episodes of acute rejection in five subjects and 16 discrete events of major infection in 14 subjects (seven BK viruria, six cytomegaloviremia, one EB and cytomegaloviremia, and two transplant pyelonephritis). Mean serum kyn/trp ratios were significantly elevated in the group that experienced acute rejection (p = 0.02). Within-subject analyses revealed that over time, urine kyn/trp ratios showed an increase (p = 0.01) and blood CD4-ATP levels showed a decrease (p = 0.007) prior to a major infection event. These pilot results suggest that a panel of biomarkers together can predict over- or under-immunosuppression, but need independent validation.
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Affiliation(s)
- Vikas R. Dharnidharka
- Division of Pediatric Nephrology, University of Florida College of Medicine, Gainesville FL USA
| | - Sushil Gupta
- Division of Pediatric Nephrology, University of Florida College of Medicine, Gainesville FL USA
| | - Eihab Al Khasawneh
- Division of Pediatric Nephrology, University of Florida College of Medicine, Gainesville FL USA
| | - Allah Haafiz
- Division of Gastroenterology and Hepatology, University of Florida College of Medicine, Gainesville FL USA
| | - Jonathan J. Shuster
- Clinical and Translational Science Institute, University of Florida College of Medicine, Gainesville FL USA,Department of Health Outcomes and Policy, University of Florida College of Medicine, Gainesville FL USA
| | - Douglas W. Theriaque
- Clinical and Translational Science Institute, University of Florida College of Medicine, Gainesville FL USA
| | - Amir H. Shahlaee
- Division of Hematology-Oncology, University of Florida College of Medicine, Gainesville FL USA
| | - Timothy J. Garrett
- Clinical and Translational Science Institute, University of Florida College of Medicine, Gainesville FL USA
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15
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Abstract
New data from Favre and colleagues strengthen the link between activation of the tryptophan oxidation (TOx) pathway--via the indoleamine 2,3-dioxygenase enzymes IDO1 and IDO2--and chronic inflammation in progressive HIV disease. It can now be appreciated that a pathogenic TOx activation cycle exists in HIV. TOx regulation is a therapeutic target for other diseases, such as cancer and autoimmune disorders. Here TOx control is examined with an eye to eventual therapeutic intervention in HIV disease.
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Affiliation(s)
- Michael F Murray
- Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA.
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16
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Huang L, Baban B, Johnson BA, Mellor AL. Dendritic cells, indoleamine 2,3 dioxygenase and acquired immune privilege. Int Rev Immunol 2010; 29:133-55. [PMID: 20367139 DOI: 10.3109/08830180903349669] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Dendritic cells (DCs) are specialized to stimulate T cell immunity. Paradoxically, some DCs suppress T cell responses and activate regulatory T cells. In this review, we focus on a potent counter-regulatory pathway mediated by plasmacytoid DCs (pDCs) expressing the immunosuppressive enzyme indoleamine 2,3 dioxygenase (IDO). IDO-expressing pDCs inhibit effector T cell responses, activate regulatory T cells, and attenuate pro-inflammatory responses in settings of chronic inflammation that manifest in clinical syndromes, such as infectious, allergic, and autoimmune diseases; cancer; and transplantation. Thus, IDO-expressing pDCs create immune privilege and provide novel opportunities to improve immunotherapy in multiple disease syndromes.
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Affiliation(s)
- Lei Huang
- Immunotherapy Center and Department of Radiology, Medical College of Georgia, Augusta, GA, USA
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17
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Bellmann-Weiler R, Martinz V, Kurz K, Engl S, Feistritzer C, Fuchs D, Rupp J, Paldanius M, Weiss G. Divergent modulation of Chlamydia pneumoniae infection cycle in human monocytic and endothelial cells by iron, tryptophan availability and interferon gamma. Immunobiology 2010; 215:842-8. [PMID: 20646782 DOI: 10.1016/j.imbio.2010.05.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Accepted: 05/20/2010] [Indexed: 11/18/2022]
Abstract
Chlamydia pneumoniae is an obligatory intracellular bacterium causing chronic inflammatory diseases in humans. We studied the role of the nutritive factors, iron and tryptophan, towards the course of infection and immune response pathways in C. pneumoniae infected endothelial cells and monocytes. Human endothelial (EA.hy923) and monocytic cells (THP-1) were infected with C. pneumoniae, supplemented with iron or 1-methyltryptophan (1-MT), an inhibitor of the tryptophan degrading enzyme indoleamine 2,3-dioxygenase (IDO), and subsequently stimulated with IFN-gamma or left untreated. The number of infected cells, the morphology and quantity of C. pneumoniae inclusion bodies, IDO activity and innate immune effector pathways were analysed. While neither iron challenge, IDO inhibition or IFN-gamma treatment had a significant effect on C. pneumoniae morphology or numbers within THP-1 monocytic cells, iron supplementation to EA.hy926 cells resulted in promotion of C. pneumoniae proliferation and differentiation while IFN-gamma had an inhibitory effect. Furthermore, the number of infected endothelial cells was significantly decreased upon 1-MT treatment. C. pneumoniae infection induced a pro-inflammatory immune response as evidenced by increased IDO activity, neopterin formation or TNF-alpha production in THP-1 but not in endothelial cells. These pathways were superinduced upon IFN-gamma treatment and partly modulated by iron supplementation. Our results demonstrate that the infectious cycle of C. pneumoniae behaves differently between monocytic and endothelial cells. While the intracellular pathogen remains in a persistent form within monocytes, it can differentiate and proliferate within endothelial cells indicating that endothelial cells are a preferred environment for Chlamydia. Nutritive factors such as iron have subtle effects on C. pneumoniae biology in endothelial, but not monocytic cells. Our results contribute to a better understanding of C. pneumoniae infection and its role in chronic inflammatory diseases such as atherosclerosis.
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Affiliation(s)
- Rosa Bellmann-Weiler
- Department of Internal Medicine I, Clinical Immunology and Infectious Diseases, Innsbruck, Austria
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18
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Chavele KM, Shukla D, Keteepe-Arachi T, Seidel JA, Fuchs D, Pusey CD, Salama AD. Regulation of myeloperoxidase-specific T cell responses during disease remission in antineutrophil cytoplasmic antibody-associated vasculitis: The role of Treg cells and tryptophan degradation. ACTA ACUST UNITED AC 2010; 62:1539-48. [DOI: 10.1002/art.27403] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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19
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Desvignes L, Ernst JD. Interferon-gamma-responsive nonhematopoietic cells regulate the immune response to Mycobacterium tuberculosis. Immunity 2009; 31:974-85. [PMID: 20064452 PMCID: PMC2807991 DOI: 10.1016/j.immuni.2009.10.007] [Citation(s) in RCA: 178] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Revised: 07/21/2009] [Accepted: 10/06/2009] [Indexed: 11/26/2022]
Abstract
Immunity to Mycobacterium tuberculosis in humans and in mice requires interferon gamma (IFN-gamma). Whereas IFN-gamma has been studied extensively for its effects on macrophages in tuberculosis, we determined that protective immunity to tuberculosis also requires IFN-gamma-responsive nonhematopoietic cells. Bone marrow chimeric mice with IFN-gamma-unresponsive lung epithelial and endothelial cells exhibited earlier mortality and higher bacterial burdens than control mice, underexpressed indoleamine-2,3-dioxygenase (Ido1) in lung endothelium and epithelium, and overexpressed interleukin-17 (IL-17) with massive neutrophilic inflammation in the lungs. We also found that the products of IDO catabolism of tryptophan selectively inhibit IL-17 production by Th17 cells, by inhibiting the action of IL-23. These results reveal a previously unsuspected role for IFN-gamma responsiveness in nonhematopoietic cells in regulation of immunity to M. tuberculosis and illustrate the role of IDO in the inhibition of Th17 cell responses.
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MESH Headings
- Animals
- Bacteremia/immunology
- Bacteremia/microbiology
- Cells, Cultured
- Endothelial Cells/immunology
- Endothelial Cells/microbiology
- Endothelial Cells/pathology
- Female
- Gene Expression Profiling
- Indoleamine-Pyrrole 2,3,-Dioxygenase/immunology
- Indoleamine-Pyrrole 2,3,-Dioxygenase/metabolism
- Interferon-gamma/metabolism
- Interleukin-17/metabolism
- Interleukin-23/immunology
- Interleukin-23/metabolism
- Kynurenine/immunology
- Kynurenine/metabolism
- Lung/immunology
- Lung/microbiology
- Lung/pathology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mycobacterium tuberculosis/immunology
- Neutrophil Infiltration/immunology
- Oligonucleotide Array Sequence Analysis
- Pneumonia, Bacterial/enzymology
- Pneumonia, Bacterial/immunology
- Receptors, Interferon/genetics
- Respiratory Mucosa/immunology
- Respiratory Mucosa/microbiology
- Respiratory Mucosa/pathology
- T-Lymphocytes, Helper-Inducer/immunology
- T-Lymphocytes, Helper-Inducer/microbiology
- Tuberculosis, Pulmonary/enzymology
- Tuberculosis, Pulmonary/immunology
- Interferon gamma Receptor
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Affiliation(s)
- Ludovic Desvignes
- Division of Infectious Diseases, Department of Medicine New York University School of Medicine 550 First Ave., Smilow 901 New York, NY, USA 10016
| | - Joel D. Ernst
- Division of Infectious Diseases, Department of Medicine New York University School of Medicine 550 First Ave., Smilow 901 New York, NY, USA 10016
- Department of Pathology New York University School of Medicine 550 First Ave., Smilow 901 New York, NY, USA 10016
- Department of Microbiology New York University School of Medicine 550 First Ave., Smilow 901 New York, NY, USA 10016
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20
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Chen YB, Li SD, He YP, Shi XJ, Chen Y, Gong JP. Immunosuppressive effect of IDO on T cells in patients with chronic hepatitis B*. Hepatol Res 2009; 39:463-8. [PMID: 19207575 DOI: 10.1111/j.1872-034x.2008.00476.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
AIM Recently indoleamine 2,3-dioxygenase (IDO) has drawn considerable attention as a mechanism of immune regulation. Our study was to observe the role of IDO in immune tolerance of chronic hepatitis B (CHB), so as to provide a novel approach for reestablishment of active immunity. METHODS Peripheral venous blood samples were taken from 50 CHB patients and HBV viral load, T lymphocyte subsets as well as the mRNA, protein and activity of IDO were detected. The correlations between HBV viral load, T lymphocyte subsets and IDO were statistically analyzed. Blood samples from 50 healthy people were tested as a control group. RESULTS In CHB patients, the mRNA, protein and activity of IDO were all significantly more than those in control group (mRNA:[2.11 +/- 0.615] x 10(3) vs. [0.143 +/- 0.026] x 10(3); protein: 0.22 +/- 0.06 vs. 0.02 +/- 0.0017; activity: 26.07 +/- 8.12 vs. 4.98 +/- 1.65; P < 0.05) and IDO mRNA was positively correlated with HBV viral load (r = 0.502, P < 0.001) and alanine aminotransferase (ALT) (r = 0.65, P < 0.01). Furthermore, IDO mRNA, protein and activity were negatively correlated with CD4(+) T cells (r = -0.622, -0.682, -0.549 respectively, P < 0.05), CD8 (+) T cells (r = -0.487, -367, -294 respectively, P < 0.05) and the ratio of CD4/CD8 (r = -0.426, -0.533, -0.397 respectively, P < 0.05). CONCLUSION IDO closely correlates with HBV viral load and is responsible for immunotolerance against HBV. Suppression of IDO could be a novel approach to break tolerance in CHB.
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Affiliation(s)
- Yong-Bing Chen
- Department of Hepatobiliary Surgery, Chinese PLA General Hospital, Beijing, China
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