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Jiang D, Soo N, Tan CY, Dankwa S, Wang HY, Theriot BS, Ardeshir A, Siddiqui NY, Van Rompay KKA, De Paris K, Permar SR, Goswami R, Surana NK. Commensal bacteria inhibit viral infections via a tryptophan metabolite. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.21.589969. [PMID: 38659737 PMCID: PMC11042330 DOI: 10.1101/2024.04.21.589969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
There is growing appreciation that commensal bacteria impact the outcome of viral infections, though the specific bacteria and their underlying mechanisms remain poorly understood. Studying a simian-human immunodeficiency virus (SHIV)-challenged cohort of pediatric nonhuman primates, we bioinformatically associated Lactobacillus gasseri and the bacterial family Lachnospiraceae with enhanced resistance to infection. We experimentally validated these findings by demonstrating two different Lachnospiraceae isolates, Clostridium immunis and Ruminococcus gnavus, inhibited HIV replication in vitro and ex vivo. Given the link between tryptophan catabolism and HIV disease severity, we found that an isogenic mutant of C. immunis that lacks the aromatic amino acid aminotransferase (ArAT) gene, which is key to metabolizing tryptophan into 3-indolelactic acid (ILA), no longer inhibits HIV infection. Intriguingly, we confirmed that a second commensal bacterium also inhibited HIV in an ArAT-dependent manner, thus establishing the generalizability of this finding. In addition, we found that purified ILA inhibited HIV infection by agonizing the aryl hydrocarbon receptor (AhR). Given that the AhR has been implicated in the control of multiple viral infections, we demonstrated that C. immunis also inhibited human cytomegalovirus (HCMV) infection in an ArAT-dependent manner. Importantly, metagenomic analysis of individuals at-risk for HIV revealed that those who ultimately acquired HIV had a lower fecal abundance of the bacterial ArAT gene compared to individuals who did not, which indicates our findings translate to humans. Taken together, our results provide mechanistic insights into how commensal bacteria decrease susceptibility to viral infections. Moreover, we have defined a microbiota-driven antiviral pathway that offers the potential for novel therapeutic strategies targeting a broad spectrum of viral pathogens.
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El-Derany MO, Hanna DMF, Youshia J, Elmowafy E, Farag MA, Azab SS. Metabolomics-directed nanotechnology in viral diseases management: COVID-19 a case study. Pharmacol Rep 2023; 75:1045-1065. [PMID: 37587394 PMCID: PMC10539420 DOI: 10.1007/s43440-023-00517-w] [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] [Received: 01/28/2023] [Revised: 07/28/2023] [Accepted: 07/28/2023] [Indexed: 08/18/2023]
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is currently regarded as the twenty-first century's plague accounting for coronavirus disease 2019 (COVID-19). Besides its reported symptoms affecting the respiratory tract, it was found to alter several metabolic pathways inside the body. Nanoparticles proved to combat viral infections including COVID-19 to demonstrate great success in developing vaccines based on mRNA technology. However, various types of nanoparticles can affect the host metabolome. Considering the increasing proportion of nano-based vaccines, this review compiles and analyses how COVID-19 and nanoparticles affect lipids, amino acids, and carbohydrates metabolism. A search was conducted on PubMed, ScienceDirect, Web of Science for available information on the interrelationship between metabolomics and immunity in the context of SARS-CoV-2 infection and the effect of nanoparticles on metabolite levels. It was clear that SARS-CoV-2 disrupted several pathways to ensure a sufficient supply of its building blocks to facilitate its replication. Such information can help in developing treatment strategies against viral infections and COVID-19 based on interventions that overcome these metabolic changes. Furthermore, it showed that even drug-free nanoparticles can exert an influence on biological systems as evidenced by metabolomics.
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Affiliation(s)
- Marwa O El-Derany
- Department of Biochemistry, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Diana M F Hanna
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, 11566, Cairo, Egypt
| | - John Youshia
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Enas Elmowafy
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Mohamed A Farag
- Pharmacognosy Department, College of Pharmacy, Cairo University, Kasr El-Aini St., P.B. 11562, Cairo, Egypt
| | - Samar S Azab
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, 11566, Cairo, Egypt.
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3
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Rasmussen KK, dos Santos Q, MacPherson CR, Zucco AG, Gjærde LK, Ilett EE, Lodding I, Helleberg M, Lundgren JD, Nielsen SD, Brix S, Sengeløv H, Murray DD. Metabolic Profiling Early Post-Allogeneic Haematopoietic Cell Transplantation in the Context of CMV Infection. Metabolites 2023; 13:968. [PMID: 37755248 PMCID: PMC10536708 DOI: 10.3390/metabo13090968] [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] [Received: 12/22/2022] [Revised: 08/08/2023] [Accepted: 08/15/2023] [Indexed: 09/28/2023] Open
Abstract
Immune dysfunction resulting from allogeneic haematopoietic stem cell transplantation (aHSCT) predisposes one to an elevated risk of cytomegalovirus (CMV) infection. Changes in metabolism have been associated with adverse outcomes, and in this study, we explored the associations between metabolic profiles and post-transplantation CMV infection using plasma samples collected 7-33 days after aHSCT. We included 68 aHSCT recipients from Rigshospitalet, Denmark, 50% of whom experienced CMV infection between days 34-100 post-transplantation. First, we investigated whether 12 metabolites selected based on the literature were associated with an increased risk of post-transplantation CMV infection. Second, we conducted an exploratory network-based analysis of the complete metabolic and lipidomic profiles in relation to clinical phenotypes and biological pathways. Lower levels of trimethylamine N-oxide were associated with subsequent CMV infection (multivariable logistic regression: OR = 0.63; 95% CI = [0.41; 0.87]; p = 0.01). Explorative analysis revealed 12 clusters of metabolites or lipids, among which one was predictive of CMV infection, and the others were associated with conditioning regimens, age upon aHSCT, CMV serostatus, and/or sex. Our results provide evidence for an association between the metabolome and CMV infection post-aHSCT that is independent of known risk factors.
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Affiliation(s)
- Kirstine K. Rasmussen
- Centre of Excellence for Health, Immunity and Infections (CHIP), Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Quenia dos Santos
- Centre of Excellence for Health, Immunity and Infections (CHIP), Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Cameron Ross MacPherson
- Centre of Excellence for Health, Immunity and Infections (CHIP), Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Adrian G. Zucco
- Centre of Excellence for Health, Immunity and Infections (CHIP), Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Lars Klingen Gjærde
- Bone Marrow Transplant Unit, Department of Hematology, Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Emma E. Ilett
- Centre of Excellence for Health, Immunity and Infections (CHIP), Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
- Center for Basic Metabolic Research (CBMR), Copenhagen University, Blegdamsvej 3, 2200 Copenhagen, Denmark
| | - Isabelle Lodding
- Centre of Excellence for Health, Immunity and Infections (CHIP), Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Marie Helleberg
- Centre of Excellence for Health, Immunity and Infections (CHIP), Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
- Department of Infectious Diseases, Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Jens D. Lundgren
- Centre of Excellence for Health, Immunity and Infections (CHIP), Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Susanne D. Nielsen
- Department of Infectious Diseases, Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Susanne Brix
- DTU Bioengineering, Department of Biotechnology and Biomedicine, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Henrik Sengeløv
- Bone Marrow Transplant Unit, Department of Hematology, Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Daniel D. Murray
- Centre of Excellence for Health, Immunity and Infections (CHIP), Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark
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Johnson KE, Heisel T, Fields DA, Isganaitis E, Jacobs KM, Knights D, Lock EF, Rudolph MC, Gale CA, Schleiss MR, Albert FW, Demerath EW, Blekhman R. Human Cytomegalovirus in breast milk is associated with milk composition, the infant gut microbiome, and infant growth. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.19.549370. [PMID: 37503212 PMCID: PMC10370112 DOI: 10.1101/2023.07.19.549370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Human cytomegalovirus (CMV) is a highly prevalent herpesvirus that is often transmitted to the neonate via breast milk. Postnatal CMV transmission can have negative health consequences for preterm and immunocompromised infants, but any effects on healthy term infants are thought to be benign. Furthermore, the impact of CMV on the composition of the hundreds of bioactive factors in human milk has not been tested. Here, we utilize a cohort of exclusively breastfeeding full term mother-infant pairs to test for differences in the milk transcriptome and metabolome associated with CMV, and the impact of CMV in breast milk on the infant gut microbiome and infant growth. We find upregulation of the indoleamine 2,3- dioxygenase (IDO) tryptophan-to-kynurenine metabolic pathway in CMV+ milk samples, and that CMV+ milk is associated with decreased Bifidobacterium in the infant gut. Our data indicate a complex relationship between milk CMV, milk kynurenine, and infant growth; with kynurenine positively correlated, and CMV viral load negatively correlated, with infant weight-for-length at 1 month of age. These results suggest CMV transmission, CMV-related changes in milk composition, or both may be modulators of full term infant development.
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Affiliation(s)
- Kelsey E Johnson
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, USA
| | - Timothy Heisel
- Division of Neonatology, Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN, USA
| | - David A Fields
- Department of Pediatrics, Diabetes-Endocrinology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Elvira Isganaitis
- Pediatric, Adolescent and Young Adult Unit, Joslin Diabetes Center, Harvard Medical School, Boston, MA, USA
| | - Katherine M Jacobs
- Department of Obstetrics, Gynecology and Women's Health, Division of Maternal-Fetal Medicine, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Dan Knights
- BioTechnology Institute, College of Biological Sciences, University of Minnesota, Minneapolis, MN, USA
- Department of Computer Science and Engineering, University of Minnesota, Minneapolis, MN, USA
| | - Eric F Lock
- Division of Biostatistics, University of Minnesota School of Public Health, Minneapolis, MN, USA
| | - Michael C Rudolph
- Harold Hamm Diabetes Center, Department of Physiology, Oklahoma University Health Sciences Center, Oklahoma City, OK, USA
| | - Cheryl A Gale
- Division of Neonatology, Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Mark R Schleiss
- Division of Pediatric Infectious Diseases and Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Frank W Albert
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, USA
| | - Ellen W Demerath
- Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, MN, USA
| | - Ran Blekhman
- Section of Genetic Medicine, Division of Biological Sciences, University of Chicago, Chicago, IL, USA
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Correia BSB, Ferreira VG, Piagge PMFD, Almeida MB, Assunção NA, Raimundo JRS, Fonseca FLA, Carrilho E, Cardoso DR. 1H qNMR-Based Metabolomics Discrimination of Covid-19 Severity. J Proteome Res 2022; 21:1640-1653. [PMID: 35674498 PMCID: PMC9212193 DOI: 10.1021/acs.jproteome.1c00977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Indexed: 01/08/2023]
Abstract
The coronavirus disease 2019 (Covid-19), which caused respiratory problems in many patients worldwide, led to more than 5 million deaths by the end of 2021. Experienced symptoms vary from mild to severe illness. Understanding the infection severity to reach a better prognosis could be useful to the clinics, and one study area to fulfill one piece of this biological puzzle is metabolomics. The metabolite profile and/or levels being monitored can help predict phenotype properties. Therefore, this study evaluated plasma metabolomes of 110 individual samples, 57 from control patients and 53 from recent positive cases of Covid-19 (IgM 98% reagent), representing mild to severe symptoms, before any clinical intervention. Polar metabolites from plasma samples were analyzed by quantitative 1H NMR. Glycerol, 3-aminoisobutyrate, formate, and glucuronate levels showed alterations in Covid-19 patients compared to those in the control group (Tukey's HSD p-value cutoff = 0.05), affecting the lactate, phenylalanine, tyrosine, and tryptophan biosynthesis and d-glutamine, d-glutamate, and glycerolipid metabolisms. These metabolic alterations show that SARS-CoV-2 infection led to disturbance in the energetic system, supporting the viral replication and corroborating with the severe clinical conditions of patients. Six polar metabolites (glycerol, acetate, 3-aminoisobutyrate, formate, glucuronate, and lactate) were revealed by PLS-DA and predicted by ROC curves and ANOVA to be potential prognostic metabolite panels for Covid-19 and considered clinically relevant for predicting infection severity due to their straight roles in the lipid and energy metabolism. Thus, metabolomics from samples of Covid-19 patients is a powerful tool for a better understanding of the disease mechanism of action and metabolic consequences of the infection in the human body and may corroborate allowing clinicians to intervene quickly according to the needs of Covid-19 patients.
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Affiliation(s)
- Banny S. B. Correia
- Instituto de Química de São Carlos,
Universidade de São Paulo, São Carlos, SP
13566-590, Brazil
| | - Vinicius G. Ferreira
- Instituto de Química de São Carlos,
Universidade de São Paulo, São Carlos, SP
13566-590, Brazil
- Instituto Nacional de Ciência e Tecnologia de
Bioanalítica, INCTBio, Campinas, SP 13083-861,
Brazil
| | | | - Mariana B. Almeida
- Instituto de Química de São Carlos,
Universidade de São Paulo, São Carlos, SP
13566-590, Brazil
- Instituto Nacional de Ciência e Tecnologia de
Bioanalítica, INCTBio, Campinas, SP 13083-861,
Brazil
| | - Nilson A. Assunção
- Instituto de Ciências Ambientais, Químicas
e Farmacêuticas, Universidade Federal de São
Paulo, São Paulo, SP 09972-270, Brazil
| | | | - Fernando L. A. Fonseca
- Faculdade de Medicina do
ABC, Santo André, SP 09060-870, Brazil
- Departamento de Ciências Farmacêuticas,
Universidade Federal de São Paulo, Diadema, SP
09972-270, Brazil
| | - Emanuel Carrilho
- Instituto de Química de São Carlos,
Universidade de São Paulo, São Carlos, SP
13566-590, Brazil
- Instituto Nacional de Ciência e Tecnologia de
Bioanalítica, INCTBio, Campinas, SP 13083-861,
Brazil
| | - Daniel R. Cardoso
- Instituto de Química de São Carlos,
Universidade de São Paulo, São Carlos, SP
13566-590, Brazil
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Abstract
Kidney diseases have become one of the most common health care problems. Due to a growing number of advanced aged patients with concomitant disorders the prevalence of these diseases will increase over the coming decades. Despite available laboratory tests, accurate and rapid diagnosis of renal dysfunction has yet to be realized, and prognosis is uncertain. Moreover, data on diagnostic and prognostic markers in kidney diseases are lacking. The kynurenine (KYN) pathway is one of the routes of tryptophan (Trp) degradation, with biologically active substances presenting ambiguous properties. The KYN pathway is known to be highly dependent on immunological system activity. As the kidneys are one of the main organs involved in the formation, degradation and excretion of Trp end products, pathologies involving the kidneys result in KYN pathway activity disturbances. This review aims to summarize changes in the KYN pathway observed in the most common kidney disease, chronic kidney disease (CKD), with a special focus on diabetic kidney disease, acute kidney injury (AKI), glomerulonephritis and kidney graft function monitoring. Additionally, the importance of KYN pathway activity in kidney cancer pathogenesis is discussed, as are available pharmacological agents affecting KYN pathway activity in the kidney. Despite limited clinical data, the KYN pathway appears to be a promising target in the diagnosis and prognosis of kidney diseases. Modulation of KYN pathway activity by pharmacological agents should be considered in the treatment of kidney diseases.
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Hypoxia-Inducible Factor 1α (HIF1α) Suppresses Virus Replication in Human Cytomegalovirus Infection by Limiting Kynurenine Synthesis. mBio 2021; 12:mBio.02956-20. [PMID: 33758082 PMCID: PMC8092273 DOI: 10.1128/mbio.02956-20] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Viruses, including human cytomegalovirus (HCMV), reprogram cellular metabolism using host metabolic regulators to support virus replication. Alternatively, in response to infection, the host can use metabolism to limit virus replication. Human cytomegalovirus (HCMV) replication depends on the activities of several host regulators of metabolism. Hypoxia-inducible factor 1α (HIF1α) was previously proposed to support virus replication through its metabolic regulatory function. HIF1α protein levels rise in response to HCMV infection in nonhypoxic conditions, but its effect on HCMV replication was not investigated. We addressed the role of HIF1α in HCMV replication by generating primary human cells with HIF1α knocked out using CRISPR/Cas9. When HIF1α was absent, we found that HCMV replication was enhanced, showing that HIF1α suppresses viral replication. We used untargeted metabolomics to determine if HIF1α regulates metabolite concentrations in HCMV-infected cells. We discovered that in HCMV-infected cells, HIF1α suppresses intracellular and extracellular concentrations of kynurenine. HIF1α also suppressed the expression of indoleamine 2,3-dioxygenase 1 (IDO1), the rate-limiting enzyme in kynurenine synthesis. In addition to its role in tryptophan metabolism, kynurenine acts as a signaling messenger by activating aryl hydrocarbon receptor (AhR). Inhibiting AhR reduces HCMV replication, while activating AhR with an exogenous ligand increases virus replication. Moreover, we found that feeding kynurenine to cells promotes HCMV replication. Overall, our findings indicate that HIF1α reduces HCMV replication by regulating metabolism and metabolite signaling.
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8
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The aryl hydrocarbon receptor facilitates the human cytomegalovirus-mediated G1/S block to cell cycle progression. Proc Natl Acad Sci U S A 2021; 118:2026336118. [PMID: 33723080 DOI: 10.1073/pnas.2026336118] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The tryptophan metabolite, kynurenine, is known to be produced at elevated levels within human cytomegalovirus (HCMV)-infected fibroblasts. Kynurenine is an endogenous aryl hydrocarbon receptor (AhR) ligand. Here we show that the AhR is activated following HCMV infection, and pharmacological inhibition of AhR or knockdown of AhR RNA reduced the accumulation of viral RNAs and infectious progeny. RNA-seq analysis of infected cells following AhR knockdown showed that the receptor alters the levels of numerous RNAs, including RNAs related to cell cycle progression. AhR knockdown alleviated the G1/S cell cycle block that is normally instituted in HCMV-infected fibroblasts, consistent with its known ability to regulate cell cycle progression and cell proliferation. In sum, AhR is activated by kynurenine and perhaps other ligands produced during HCMV infection, it profoundly alters the infected-cell transcriptome, and one outcome of its activity is a block to cell cycle progression, providing mechanistic insight to a long-known element of the virus-host cell interaction.
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9
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Tryptophan Metabolism via Kynurenine Pathway: Role in Solid Organ Transplantation. Int J Mol Sci 2021; 22:ijms22041921. [PMID: 33671985 PMCID: PMC7919278 DOI: 10.3390/ijms22041921] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/10/2021] [Accepted: 02/11/2021] [Indexed: 01/01/2023] Open
Abstract
Solid organ transplantation is a gold standard treatment for patients suffering from an end-stage organ disease. Patient and graft survival have vastly improved during the last couple of decades; however, the field of transplantation still encounters several unique challenges, such as a shortage of transplantable organs and increasing pool of extended criteria donor (ECD) organs, which are extremely prone to ischemia-reperfusion injury (IRI), risk of graft rejection and challenges in immune regulation. Moreover, accurate and specific biomarkers, which can timely predict allograft dysfunction and/or rejection, are lacking. The essential amino acid tryptophan and, especially, its metabolites via the kynurenine pathway has been widely studied as a contributor and a therapeutic target in various diseases, such as neuropsychiatric, autoimmune disorders, allergies, infections and malignancies. The tryptophan-kynurenine pathway has also gained interest in solid organ transplantation and a variety of experimental studies investigating its role both in IRI and immune regulation after allograft implantation was first published. In this review, the current evidence regarding the role of tryptophan and its metabolites in solid organ transplantation is presented, giving insights into molecular mechanisms and into therapeutic and diagnostic/prognostic possibilities.
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10
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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] [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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Oweira H, Khajeh E, Mohammadi S, Ghamarnejad O, Daniel V, Schnitzler P, Golriz M, Mieth M, Morath C, Zeier M, Mehrabi A, Sadeghi M. Pre-transplant CD200 and CD200R1 concentrations are associated with post-transplant events in kidney transplant recipients. Medicine (Baltimore) 2019; 98:e17006. [PMID: 31517819 PMCID: PMC6750316 DOI: 10.1097/md.0000000000017006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
CD200 is an immunoglobulin superfamily membrane protein that binds to a myeloid cell-specific receptor and induces inhibitory signaling. The aim of this study was to investigate the role of CD200 and its receptor (CD200R1) on kidney transplant (KTx) outcome. In a collective of 125 kidney recipients (University hospital, Heidelberg, Germany), CD200 and CD200R1 concentrations were evaluated immediately before transplantation. Recipient baseline and clinical characteristics and KTx outcome, including acute rejection (AR), acute tubular necrosis, delayed graft function, cytomegalovirus (CMV) and human polyomaviridae (BK) virus infections, and graft loss were evaluated during the first post-transplant year. The association of CD200 and CD200R1 concentrations and CD200R1/CD200 ratios with the outcome of KTx was investigated for the first time in a clinical setting in a prospective cohort. There was a positive association between pre-transplant CD200R1 concentrations and CMV (re)activation (P = .041). Also, increased CD200R1 concentration was associated with a longer duration of CMV infection (P = .049). Both the frequency of AR and levels of creatinine (3 and 6 months after KTx) were significantly higher in patients with an increased CD200R1/CD200 ratio (median: 126 vs 78, P = .008). Increased pre-transplant CD200R1/CD200 ratios predict immunocompetence and risk of AR, whereas high CD200R1 concentrations predict immunosuppression and high risk of severe CMV (re)activation after KTx.
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Affiliation(s)
- Hani Oweira
- Department of General, Visceral and Transplant Surgery
| | - Elias Khajeh
- Department of General, Visceral and Transplant Surgery
| | | | | | | | | | | | - Markus Mieth
- Department of General, Visceral and Transplant Surgery
| | - Christian Morath
- Division of Nephrology, Ruprecht Karls, University of Heidelberg, Heidelberg, Germany
| | - Martin Zeier
- Division of Nephrology, Ruprecht Karls, University of Heidelberg, Heidelberg, Germany
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12
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Oweira H, Lahdou I, Opelz G, Daniel V, Terness P, Schmidt J, Mehrabi A, Fusch G, Schefold J, Zidan A, Sadeghi M. Association of pre- and early post-transplant serum amino acids and metabolites of amino acids and liver transplant outcome. Transpl Immunol 2017; 46:42-48. [PMID: 29258878 DOI: 10.1016/j.trim.2017.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 12/07/2017] [Indexed: 01/20/2023]
Abstract
The aim of the present study was to investigate association of serum amino (AA) acids and metabolites of AAs with post-transplant outcome in liver transplant recipients. Eighty-nine patients with end-stage liver diseases and available pre- and early post-transplant serum were characterised as patients with (GI) and without one-year mortality (GII) and patients with and without early graft dysfunction (EAD). A panel of pre- and early post-transplant serum levels of AAs and early and metabolites of tryptophan were measured using tandem mass spectrometry. Patient groups had significantly higher pre-transplant serum levels of phenylalanine, tryptophan, and tryptophan metabolites than healthy controls (for all p<0.001). Pre-transplant serum levels of all these parameters were significantly higher in GI than in GII (for all p<0.001). GI had a higher MELD score and re-transplantation number than GII (p≤0.005 for both investigations). Serum bilirubin on day 5 and serum phenylalanine on day 10 post-transplant were associated parameters of mortality, whereas day 1post-transplant phenylalanine and kynurenine and female gender were associated parameters of EAD. Our results indicate that pre- and early post-transplant levels of phenylalanine, tryptophan and metabolites of tryptophan are increased in patients and are associated with EAD and one-year mortality in liver transplant recipients.
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Affiliation(s)
- H Oweira
- Department of General, Visceral and Transplant Surgery, University of Heidelberg, Heidelberg, Germany; General and Visceral Surgery, Hirslanden Private Hospital, Zurich, Switzerland.
| | - I Lahdou
- Transplantation-Immunology, University of Heidelberg, Germany
| | - G Opelz
- Transplantation-Immunology, University of Heidelberg, Germany.
| | - V Daniel
- Transplantation-Immunology, University of Heidelberg, Germany.
| | - P Terness
- Transplantation-Immunology, University of Heidelberg, Germany.
| | - J Schmidt
- Department of General, Visceral and Transplant Surgery, University of Heidelberg, Heidelberg, Germany; General and Visceral Surgery, Hirslanden Private Hospital, Zurich, Switzerland.
| | - A Mehrabi
- Department of General, Visceral and Transplant Surgery, University of Heidelberg, Heidelberg, Germany.
| | - G Fusch
- Department of Paediatrics, McMaster University, Hamilton, Canada.
| | - J Schefold
- Department of Intensive Care Medicine Inselspital, Bern University Hospital, Freiburgstrasse 18, CH-3012 Bern, Switzerland.
| | - A Zidan
- Department of General, Visceral and Transplant Surgery, University of Heidelberg, Heidelberg, Germany; Department of HPB and liver transplantation, Rajhy Liver Hospital, Assiut University, Assiut, Egypt.
| | - M Sadeghi
- Department of General, Visceral and Transplant Surgery, University of Heidelberg, Heidelberg, Germany; Transplantation-Immunology, University of Heidelberg, Germany.
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Pschowski R, Pape UF, Fusch G, Fischer C, Jann H, Baur A, Arsenic R, Wiedenmann B, von Haehling S, Pavel M, Schefold JC. Increased Activity of the Immunoregulatory Enzyme Indoleamine-2,3-Dioxygenase with Consecutive Tryptophan Depletion Predicts Death in Patients with Neuroendocrine Neoplasia. Neuroendocrinology 2017; 104:135-144. [PMID: 26954941 DOI: 10.1159/000445191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 03/02/2016] [Indexed: 11/19/2022]
Abstract
BACKGROUND/AIMS Data from a considerable number of malignancies demonstrate that depletion of the essential amino acid tryptophan via induction of the immunoregulatory enzyme indoleamine-2,3-dioxygenase (IDO) serves as an important tumour escape strategy and is of prognostic importance. Here we investigate the predictive value of the activity of IDO as well as levels of tryptophan and respective downstream catabolites in a large cohort of patients with neuroendocrine neoplasms (NEN). METHODS 142 consecutive Caucasian patients (62 male, aged 60.3 ± 11.9 years) with histologically confirmed NEN were systematically analysed in a retrospective blinded end point analysis. Patients were followed up for a mean period of about 3.9 ± 1.9 years. Clinical outcome, levels of established biomarkers, and tryptophan degradation markers (assessed using tandem mass spectrometry) including estimated IDO activity were recorded. Cox proportional hazards regression models were performed for the assessment of prognostic power. RESULTS We found that baseline tryptophan levels were significantly lower and IDO activity was significantly increased in non-survivors. The risk for death inclined stepwise and was highest in patients in the upper tertile of IDO activity. Cox proportional regression models identified IDO activity as an independent predictor of death. CONCLUSIONS In this retrospective analysis, we observed that baseline activity of the immunoregulatory enzyme IDO was significantly increased in non-survivors. IDO activity was identified as an independent predictor of death in this cohort of NEN patients. Whether IDO activity or tryptophan depletion serves to guide future therapeutic interventions in NEN remains to be established.
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Affiliation(s)
- René Pschowski
- Department of Hepatology and Gastroenterology, Charité Campus Mitte [CCM and Campus Virchow Clinic (CVK)], Charité, University Medicine Berlin, Berlin, Germany
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Serum metabolomics analysis of patients with chikungunya and dengue mono/co-infections reveals distinct metabolite signatures in the three disease conditions. Sci Rep 2016; 6:36833. [PMID: 27845374 PMCID: PMC5109290 DOI: 10.1038/srep36833] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 10/17/2016] [Indexed: 12/23/2022] Open
Abstract
Chikungunya and dengue are arboviral infections with overlapping clinical symptoms. A subset of chikungunya infection occurs also as co-infections with dengue, resulting in complications during diagnosis and patient management. The present study was undertaken to identify the global metabolome of patient sera infected with chikungunya as mono infections and with dengue as co-infections. Using nuclear magnetic resonance (NMR) spectroscopy, the metabolome of sera of three disease conditions, namely, chikungunya and dengue as mono-infections and when co-infected were ascertained and compared with healthy individuals. Further, the cohorts were analyzed on the basis of age, onset of fever and joint involvement. Here we show that many metabolites in the serum are significantly differentially regulated during chikungunya mono-infection as well as during chikungunya co-infection with dengue. We observed that glycine, serine, threonine, galactose and pyrimidine metabolisms are the most perturbed pathways in both mono and co-infection conditions. The affected pathways in our study correlate well with the clinical manifestation like fever, inflammation, energy deprivation and joint pain during the infections. These results may serve as a starting point for validations and identification of distinct biomolecules that could be exploited as biomarker candidates thereby helping in better patient management.
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Sadeghi M, Lahdou I, Opelz G, Mehrabi A, Zeier M, Schnitzler P, Daniel V. IL-23 plasma level is strongly associated with CMV status and reactivation of CMV in renal transplant recipients. BMC Immunol 2016; 17:35. [PMID: 27716059 PMCID: PMC5048605 DOI: 10.1186/s12865-016-0175-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 09/26/2016] [Indexed: 01/14/2023] Open
Abstract
Background Cytomegalovirus seropositivity is an independent risk factor for atherosclerosis in patients with ESRD. Donor CMV seropositivity is associated with higher graft loss. Dendritic cells, macrophages and Th17 lymphocytes are defined as producers of IL-23. IL-23 is thought to be involved in the promotion of Th17 cell polarization. Latent CMV-induced Th17 might be involved in the pathogenesis of CMV infection in patients with ESRD. We aimed to evaluate associations of Th17-dependent cytokines with ESRD, CMV status and post-transplant outcome in kidney transplantation. Results IL-21 plasma levels were similar in patients and healthy controls (p = 0.47), whereas IL-9 (p = 0.02) and IL-23 (p < 0.0001) levels were significantly higher in ESRD patients. CMV-seronegative (p = 0.002) and –seropositive (p < 0.001) patients had significantly higher IL-23 plasma levels than controls. CMV-seropositive patients showed excessively higher IL-23 (p < 0.001) plasma levels than CMV-seronegative patients. Patients with post-transplant CMV reactivation had higher IL-23 plasma levels than patients without CMV reactivation (p = 0.025). Conclusions Our results indicate that latent CMV induces IL-23. IL-23 might be an inflammatory mediator of latent CMV infection in patients with ESRD and predisposes patients for post-transplant CMV reactivation.
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Affiliation(s)
- Mahmoud Sadeghi
- Department of General, Visceral and Transplant Surgery, University of Heidelberg, Im Neuenheimer Feld 110, D-69120, Heidelberg, Germany. .,Transplantation Immunology, University of Heidelberg, Heidelberg, Germany.
| | - Imad Lahdou
- Transplantation Immunology, University of Heidelberg, Heidelberg, Germany
| | - Gerhard Opelz
- Transplantation Immunology, University of Heidelberg, Heidelberg, Germany
| | - Arianeb Mehrabi
- Department of General, Visceral and Transplant Surgery, University of Heidelberg, Im Neuenheimer Feld 110, D-69120, Heidelberg, Germany
| | - Martin Zeier
- Department of Nephrology, University of Heidelberg, Heidelberg, Germany
| | - Paul Schnitzler
- Center for Infectious Diseases, Virology, University of Heidelberg, Heidelberg, Germany
| | - Volker Daniel
- Transplantation Immunology, University of Heidelberg, Heidelberg, Germany
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16
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Sutariya PG, Pandya A, Lodha A, Menon SK. A unique fluorescence biosensor for selective detection of tryptophan and histidine. Analyst 2015; 139:4794-8. [PMID: 25096414 DOI: 10.1039/c4an00829d] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel photoinduced electron transfer (PET) based substituted calix[4]arene fluoroionophore has been used for the selective recognition of tryptophan (L-Trp) and histidine (L-His) by emission spectroscopy. The detection limit of the synthesized receptor was found to be 0.00826 nM for L-Trp and 0.00158 nM for L-His. Moreover, this probe has been applied for the recognition of L-Trp and L-His from blood serum.
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Affiliation(s)
- Pinkesh G Sutariya
- Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedabad 380009, India
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Mehraj V, Routy JP. Tryptophan Catabolism in Chronic Viral Infections: Handling Uninvited Guests. Int J Tryptophan Res 2015; 8:41-8. [PMID: 26309411 PMCID: PMC4527356 DOI: 10.4137/ijtr.s26862] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 05/17/2015] [Accepted: 05/19/2015] [Indexed: 11/25/2022] Open
Abstract
l-Tryptophan (l-Trp) is an essential amino acid that possesses diverse metabolic, neurological, and immunological roles spanning from the synthesis of proteins, neurotransmitter serotonin, and neurohormone melatonin, to its degradation into immunosuppressive catabolites by indoleamine-2, 3-dioxygenase (IDO) in the kynurenine pathway (KP). Trp catabolites, by activating aryl hydrocarbon receptor (AhR), play an important role in antimicrobial defense and immune regulation. IDO/AhR acts as a double-edged sword by both depleting l-Trp to starve the invaders and by contributing to the state of immunosuppression with microorganisms that were not cleared during acute infection. Pathogens experiencing Trp deprivation by IDO-mediated degradation include certain bacteria, parasites, and less likely viruses. However, chronic viral infections highjack the host immune response to create a state of disease tolerance via kynurenine catabolites. This review covers the latest data involving chronic viral infections such as human immunodeficiency virus (HIV), hepatitis B virus (HBV), hepatitis C virus (HCV), herpes, and cytomegalovirus (CMV) and their cellular interplay with Trp catabolites. Strategies developed by viruses to escape immune control also represent new avenues for therapeutic interventions based on Trp metabolism.
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Affiliation(s)
- Vikram Mehraj
- Chronic Viral Illness Service, McGill University Health Centre, Montreal, QC, Canada. ; Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Jean-Pierre Routy
- Chronic Viral Illness Service, McGill University Health Centre, Montreal, QC, Canada. ; Research Institute of the McGill University Health Centre, Montreal, QC, Canada. ; Division of Hematology, McGill University Health Centre, Montreal, QC, Canada
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Cytomegalovirus impairs the induction of indoleamine 2,3-dioxygenase mediated antimicrobial and immunoregulatory effects in human fibroblasts. PLoS One 2013; 8:e64442. [PMID: 23691219 PMCID: PMC3654966 DOI: 10.1371/journal.pone.0064442] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 04/14/2013] [Indexed: 12/24/2022] Open
Abstract
Human fibroblasts provide immunosuppressive functions that are partly mediated by the tryptophan-catabolizing enzyme indoleamine-2,3-dioxygenase (IDO). Moreover, upon stimulation with inflammatory cytokines human fibroblasts exhibit broad-spectrum antimicrobial effector functions directed against various clinically relevant pathogens and these effects are also IDO-dependent. Therefore human fibroblasts are suggested to be involved in the control of immune reactions during infectious diseases. As human cytomegalovirus (HCMV) represents a pathogen frequently found in immunocompromised hosts and IDO is involved in the control of HCMV growth, we here investigated the impact of HCMV infection on IDO-mediated antimicrobial and immunoregulatory effects. We show that infection with HCMV substantially impairs IFN-γ-induced IDO-activity in human fibroblasts in a dose and time dependent fashion. Consequently, these cells are no longer able to restrict bacterial and parasitic growth and, furthermore, loose their IDO-mediated immunosuppressive capacity. Our results may have significant implications for the course of HCMV infection during solid organ transplantation: we suggest that loss of IDO-mediated antimicrobial and immunoregulatory functions during a HCMV infection might at least in part explain the enhanced risk of organ rejection and infections observed in patients with HCMV reactivation after solid organ transplantation.
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Lahdou I, Sadeghi M, Oweira H, Fusch G, Daniel V, Mehrabi A, Jung GE, Elhadedy H, Schmidt J, Sandra-Petrescu F, Iancu M, Opelz G, Terness P, Schefold JC. Increased serum levels of quinolinic acid indicate enhanced severity of hepatic dysfunction in patients with liver cirrhosis. Hum Immunol 2013; 74:60-6. [DOI: 10.1016/j.humimm.2012.09.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Revised: 08/28/2012] [Accepted: 09/10/2012] [Indexed: 01/29/2023]
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Bubnoff D, Bieber T. The indoleamine 2,3-dioxygenase (IDO) pathway controls allergy. Allergy 2012; 67:718-25. [PMID: 22519427 DOI: 10.1111/j.1398-9995.2012.02830.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2012] [Indexed: 11/30/2022]
Abstract
A series of recent studies have demonstrated that the immunoregulatory pathway of tryptophan catabolism, initiated by the enzyme indoleamine 2,3-dioxygenase (IDO), is a critical participant in allergic inflammation. Originally known for its regulatory function during pregnancy and during chronic inflammation in tumorigenesis and infection, the activity of IDO seems to positively modify the inflammatory state of atopy or allergy. The tryptophan degradation pathway is important for tolerance induction during systemic allergen immunotherapy. Here, we focus on recent findings that establish the IDO pathway as central to allergic inflammation.
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Affiliation(s)
- D. Bubnoff
- Department of Dermatology and Allergy; Friedrich-Wilhelms-University; Bonn; Germany
| | - T. Bieber
- Department of Dermatology and Allergy; Friedrich-Wilhelms-University; Bonn; Germany
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