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Summers BS, Thomas Broome S, Pang TWR, Mundell HD, Koh Belic N, Tom NC, Ng ML, Yap M, Sen MK, Sedaghat S, Weible MW, Castorina A, Lim CK, Lovelace MD, Brew BJ. A Review of the Evidence for Tryptophan and the Kynurenine Pathway as a Regulator of Stem Cell Niches in Health and Disease. Int J Tryptophan Res 2024; 17:11786469241248287. [PMID: 38757094 PMCID: PMC11097742 DOI: 10.1177/11786469241248287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 04/03/2024] [Indexed: 05/18/2024] Open
Abstract
Stem cells are ubiquitously found in various tissues and organs in the body, and underpin the body's ability to repair itself following injury or disease initiation, though repair can sometimes be compromised. Understanding how stem cells are produced, and functional signaling systems between different niches is critical to understanding the potential use of stem cells in regenerative medicine. In this context, this review considers kynurenine pathway (KP) metabolism in multipotent adult progenitor cells, embryonic, haematopoietic, neural, cancer, cardiac and induced pluripotent stem cells, endothelial progenitor cells, and mesenchymal stromal cells. The KP is the major enzymatic pathway for sequentially catabolising the essential amino acid tryptophan (TRP), resulting in key metabolites including kynurenine, kynurenic acid, and quinolinic acid (QUIN). QUIN metabolism transitions into the adjoining de novo pathway for nicotinamide adenine dinucleotide (NAD) production, a critical cofactor in many fundamental cellular biochemical pathways. How stem cells uptake and utilise TRP varies between different species and stem cell types, because of their expression of transporters and responses to inflammatory cytokines. Several KP metabolites are physiologically active, with either beneficial or detrimental outcomes, and evidence of this is presented relating to several stem cell types, which is important as they may exert a significant impact on surrounding differentiated cells, particularly if they metabolise or secrete metabolites differently. Interferon-gamma (IFN-γ) in mesenchymal stromal cells, for instance, highly upregulates rate-limiting enzyme indoleamine-2,3-dioxygenase (IDO-1), initiating TRP depletion and production of metabolites including kynurenine/kynurenic acid, known agonists of the Aryl hydrocarbon receptor (AhR) transcription factor. AhR transcriptionally regulates an immunosuppressive phenotype, making them attractive for regenerative therapy. We also draw attention to important gaps in knowledge for future studies, which will underpin future application for stem cell-based cellular therapies or optimising drugs which can modulate the KP in innate stem cell populations, for disease treatment.
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Affiliation(s)
- Benjamin Sebastian Summers
- Applied Neurosciences Program, Peter Duncan Neurosciences Research Unit, St. Vincent’s Centre for Applied Medical Research, Sydney, NSW, Australia
- Faculty of Medicine and Health, School of Clinical Medicine, UNSW Sydney, NSW, Australia
| | - Sarah Thomas Broome
- Faculty of Science, Laboratory of Cellular and Molecular Neuroscience, School of Life Sciences, University of Technology Sydney, NSW, Australia
| | | | - Hamish D Mundell
- Faculty of Medicine and Health, New South Wales Brain Tissue Resource Centre, School of Medical Sciences, Charles Perkins Centre, University of Sydney, NSW, Australia
| | - Naomi Koh Belic
- School of Life Sciences, University of Technology, Sydney, NSW, Australia
| | - Nicole C Tom
- Formerly of the Department of Physiology, University of Sydney, NSW, Australia
| | - Mei Li Ng
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Maylin Yap
- Formerly of the Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia
| | - Monokesh K Sen
- Applied Neurosciences Program, Peter Duncan Neurosciences Research Unit, St. Vincent’s Centre for Applied Medical Research, Sydney, NSW, Australia
- School of Medicine, Western Sydney University, NSW, Australia
- Faculty of Medicine and Health, School of Medical Sciences, Charles Perkins Centre, The University of Sydney, NSW, Australia
| | - Sara Sedaghat
- Montreal Neurological Institute, McGill University, Montreal, QC, Canada
| | - Michael W Weible
- School of Environment and Science, Griffith University, Brisbane, QLD, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD, Australia
| | - Alessandro Castorina
- Faculty of Science, Laboratory of Cellular and Molecular Neuroscience, School of Life Sciences, University of Technology Sydney, NSW, Australia
| | - Chai K Lim
- Faculty of Medicine, Macquarie University, Sydney, NSW, Australia
| | - Michael D Lovelace
- Applied Neurosciences Program, Peter Duncan Neurosciences Research Unit, St. Vincent’s Centre for Applied Medical Research, Sydney, NSW, Australia
- Faculty of Medicine and Health, School of Clinical Medicine, UNSW Sydney, NSW, Australia
| | - Bruce J Brew
- Applied Neurosciences Program, Peter Duncan Neurosciences Research Unit, St. Vincent’s Centre for Applied Medical Research, Sydney, NSW, Australia
- Faculty of Medicine and Health, School of Clinical Medicine, UNSW Sydney, NSW, Australia
- Departments of Neurology and Immunology, St. Vincent’s Hospital, Sydney, NSW, Australia
- University of Notre Dame, Darlinghurst, Sydney, NSW, Australia
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2
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Gumusoglu SB, Kiel MD, Gugel A, Schickling BM, Weaver KR, Lauffer MC, Sullivan HR, Coulter KJ, Blaine BM, Kamal M, Zhang Y, Devor EJ, Santillan DA, Gantz SC, Santillan MK. Anti-angiogenic mechanisms and serotonergic dysfunction in the Rgs2 knockout model for the study of psycho-obstetric risk. Neuropsychopharmacology 2024; 49:864-875. [PMID: 37848733 PMCID: PMC10948883 DOI: 10.1038/s41386-023-01749-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 09/26/2023] [Accepted: 09/28/2023] [Indexed: 10/19/2023]
Abstract
Psychiatric and obstetric diseases are growing threats to public health and share high rates of co-morbidity. G protein-coupled receptor signaling (e.g., vasopressin, serotonin) may be a convergent psycho-obstetric risk mechanism. Regulator of G Protein Signaling 2 (RGS2) mutations increase risk for both the gestational disease preeclampsia and for depression. We previously found preeclampsia-like, anti-angiogenic obstetric phenotypes with reduced placental Rgs2 expression in mice. Here, we extend this to test whether conserved cerebrovascular and serotonergic mechanisms are also associated with risk for neurobiological phenotypes in the Rgs2 KO mouse. Rgs2 KO exhibited anxiety-, depression-, and hedonic-like behaviors. Cortical vascular density and vessel length decreased in Rgs2 KO; cortical and white matter thickness and cell densities were unchanged. In Rgs2 KO, serotonergic gene expression was sex-specifically changed (e.g., cortical Htr2a, Maoa increased in females but all serotonin targets unchanged or decreased in males); redox-related expression increased in paraventricular nucleus and aorta; and angiogenic gene expression was changed in male but not female cortex. Whole-cell recordings from dorsal raphe serotonin neurons revealed altered 5-HT1A receptor-dependent inhibitory postsynaptic currents (5-HT1A-IPSCs) in female but not male KO neurons. Additionally, serotonin transporter blockade by the SSRI sertraline increased the amplitude and time-to-peak of 5-HT1A-IPSCs in KO neurons to a greater extent than in WT neurons in females only. These results demonstrate behavioral, cerebrovascular, and sertraline hypersensitivity phenotypes in Rgs2 KOs, some of which are sex-specific. Disruptions may be driven by vascular and cell stress mechanisms linking the shared pathogenesis of psychiatric and obstetric disease to reveal future targets.
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Affiliation(s)
- Serena B Gumusoglu
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, USA
- Iowa Neuroscience Institute, University of Iowa, Iowa City, USA
| | - Michaela D Kiel
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, USA
| | - Aleigha Gugel
- Iowa Neuroscience Institute, University of Iowa, Iowa City, USA
- Department of Molecular Physiology and Biophysics, Carver College of Medicine, University of Iowa, Iowa City, USA
| | - Brandon M Schickling
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, USA
| | - Kaylee R Weaver
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, USA
| | - Marisol C Lauffer
- Iowa Neuroscience Institute, University of Iowa, Iowa City, USA
- Neural Circuits and Behavior Core, Iowa Neuroscience Institute, University of Iowa, Iowa City, USA
| | - Hannah R Sullivan
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, USA
| | - Kaylie J Coulter
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, USA
| | - Brianna M Blaine
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, USA
| | - Mushroor Kamal
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, USA
| | - Yuping Zhang
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, USA
| | - Eric J Devor
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, USA
| | - Donna A Santillan
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, USA
| | - Stephanie C Gantz
- Iowa Neuroscience Institute, University of Iowa, Iowa City, USA
- Department of Molecular Physiology and Biophysics, Carver College of Medicine, University of Iowa, Iowa City, USA
| | - Mark K Santillan
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, USA.
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3
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Gumusoglu SB. The role of the placenta-brain axis in psychoneuroimmune programming. Brain Behav Immun Health 2024; 36:100735. [PMID: 38420039 PMCID: PMC10900837 DOI: 10.1016/j.bbih.2024.100735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/06/2024] [Accepted: 02/04/2024] [Indexed: 03/02/2024] Open
Abstract
Gestational exposures have enduring impacts on brain and neuroimmune development and function. Perturbations of pregnancy leading to placental structure/function deficits, cell stress, immune activation, and endocrine changes (metabolic, growth factors, etc.) all increase neuropsychiatric risk in offspring. The existing literature links obstetric diseases with placental involvement to offspring neuroimmune outcomes and neurodevelopmental risk. Psychoneuroimmune outcomes in offspring brain include changes to microglia, cytokine/chemokine production, cell stress, and long-term immunoreactivity. These outcomes are altered by structural, anti-angiogenic/hypoxic, inflammatory, and metabolic diseases of the placenta. This fetal programming occurs via direct placental passage or production of factors which can act directly on fetal brain substrates, or indirectly via action of circulating factors on intermediates in the placenta. Placental neuroendocrine, vascular/angiogenic, immune, and extracellular vesicular mechanisms are detailed. These mechanisms interact within various placental and pregnancy conditions. An increased understanding of the placental origins of psychoneuroimmunology will yield dividends for human health. Identifying maternal and placental biomarkers for fetal neuroimmune health may also revolutionize early diagnosis and precision psychiatry, empowering patients to make the best healthcare decisions for their families. Targeting placental mechanisms may be a valuable approach for the prevention and mitigation of intergenerational, lifelong neuropathology.
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Affiliation(s)
- Serena B. Gumusoglu
- Department of Obstetrics and Gynecology, University of Iowa Carver College of Medicine, 200 Hawkins Dr. Iowa City, IA, 52327, USA
- Department of Psychiatry, University of Iowa Carver College of Medicine, USA
- Iowa Neuroscience Institute, University of Iowa, Iowa City, IA, USA
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Gumusoglu S, Meincke CR, Kiel M, Betz A, Nuckols V, DuBose L, Steidele J, Sweezer E, Santillan D, Stroud AK, Pierce GL, Santillan MK. Low indoleamine 2, 3 dioxygenase (IDO) activity is associated with psycho-obstetric risk. Pregnancy Hypertens 2024; 35:12-18. [PMID: 38064980 PMCID: PMC11003651 DOI: 10.1016/j.preghy.2023.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 11/16/2023] [Accepted: 11/23/2023] [Indexed: 12/28/2023]
Abstract
OBJECTIVES Preeclampsia and depression in pregnancy are among the most prevalent obstetric disorders with no known cures. While depression and preeclampsia each increase risk for the other, shared mechansisms are unclear. One possibility is low levels of Indoleamine 2,3 dioxygenase (IDO), which links immune dysregulation and oxidative arterial damage resulting in poor vascular function in both preeclampsia and depression. We hypothesized low circulating IDO activity levels in pregnancy would correspond to poor vascular function and depression symptoms. STUDY DESIGN In this nested case-control study, clinical, demographic, and biologic data from a cohort of pregnant women recruited to longitudinal studies measuring noninvasive vascular function and circulating factors were analyzed. MAIN OUTCOME MEASURE IDO activity across all three trimesters of pregnancy was measured using a colorimetric assay. Carotid-femoral pulse wave velocity (cfPWV), a measure of arterial stiffness, was also assessed throughout gestation by non-invasive applanation tonometry. Depression symptoms were assessed in pregnancy via the validated patient health questionnaire 9 (PHQ9). RESULTS Participants with low second and third trimester IDO activity had significantly decreased cfPWV. This association remained statistically significant when controlled for confounders such as BMI and chronic hypertension in the third but not second trimester. While PHQ9 scores were not associated with cfPWV differences, IDO activity was lower in moderate and severely depressed relative to non-depressed pregnant individuals. CONCLUSION These results implicate IDO in arterial stiffness and depression symptoms, suggesting that decreased IDO may be a central target for improved psycho-obstetric health.
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Affiliation(s)
- Serena Gumusoglu
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, United States
| | - Casee R Meincke
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, United States
| | - Michaela Kiel
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, United States
| | - Alexandria Betz
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, United States
| | - Virginia Nuckols
- Department of Health and Human Physiology, University of Iowa, Iowa City, IA 52242, United States
| | - Lyndsey DuBose
- Department of Health and Human Physiology, University of Iowa, Iowa City, IA 52242, United States
| | - Jessica Steidele
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, United States; Department of Health and Human Physiology, University of Iowa, Iowa City, IA 52242, United States
| | - Eileen Sweezer
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, United States
| | - Donna Santillan
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, United States
| | - Amy K Stroud
- Department of Health and Human Physiology, University of Iowa, Iowa City, IA 52242, United States
| | - Gary L Pierce
- Department of Health and Human Physiology, University of Iowa, Iowa City, IA 52242, United States
| | - Mark K Santillan
- Department of Health and Human Physiology, University of Iowa, Iowa City, IA 52242, United States.
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5
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Chilosi M, Doglioni C, Ravaglia C, Piciucchi S, Dubini A, Stefanizzi L, Poletti V. COVID-19. Biology, pathophysiology, and immunology: a pathologist view. Pathologica 2023; 115:248-256. [PMID: 38054899 DOI: 10.32074/1591-951x-954] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 10/09/2023] [Indexed: 12/07/2023] Open
Abstract
Even if the SARS-CoV-2 pandemic has been declared over, several risks and clinical problems remain to be faced, including long-COVID sequelae and possible outbreaks of pathogenic variants. Intense research on COVID-19 has provided in these few years a striking amount of data covering different fields and disciplines, which can help to provide a knowledge shield against new potential infective spreads, and may also potentially be applied to other fields of medicine, including oncology and neurology. Nevertheless, areas of uncertainty still remain regarding the pathogenic mechanisms that subtend the multifaceted manifestations of the disease. To better clarify the pathogenesis of the disease, a systematic multidisciplinary evaluation of the many mechanisms involved in COVID-19 is mandatory, including clinical, physiological, radiological, immunological and pathological studies. In COVID-19 syndrome the pathological studies have been mainly performed on autopsy cases, and only a few studies are available on biopsies. Nevertheless, these studies have provided relevant information that can substantially contribute to decipher the complex scenario characterizing the different forms of COVID-19 and long-COVID-19. In this review the data provided by pathological investigations are recapitulated and discussed, in the light of different hypothesis and data provided by clinical, physiological and immunological data.
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Affiliation(s)
- Marco Chilosi
- Department of Pathology, Pederzoli Hospital, Peschiera del Garda, Italy
| | - Claudio Doglioni
- Department of Pathology, San Raffaele Scientific Institute. Milan, Italy
| | - Claudia Ravaglia
- Department of Diseases of the Thorax, Ospedale GB Morgagni, Forlì, Italy
| | - Sara Piciucchi
- Department of Diseases of the Thorax, Ospedale GB Morgagni, Forlì, Italy
| | | | | | - Venerino Poletti
- Department of Diseases of the Thorax, Ospedale GB Morgagni, Forlì, Italy
- Department of Pathology, Ospedale GB Morgagni, Forlì, Italy
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Gray G, Scroggins DG, Wilson KT, Scroggins SM. Cellular Immunotherapy in Mice Prevents Maternal Hypertension and Restores Anti-Inflammatory Cytokine Balance in Maternal and Fetal Tissues. Int J Mol Sci 2023; 24:13594. [PMID: 37686399 PMCID: PMC10487605 DOI: 10.3390/ijms241713594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 08/29/2023] [Accepted: 09/01/2023] [Indexed: 09/10/2023] Open
Abstract
Preeclampsia is the leading cause of maternal-fetal morbidity worldwide. The concept that persistent feto-placental intolerance is important in the pathogenesis of preeclampsia (PreE) has been demonstrated by our lab and others. Arginine vasopressin (AVP) infusion during pregnancy induces cardiovascular, renal, and T helper (TH) cell alterations in mice consistent with human PreE. In addition to their conventional immuno-stimulatory role, dendritic cells (DCs) also play a vital role in immune tolerance. In contrast to conventional DCs, regulatory DCs (DCregs) express low levels of co-stimulatory markers, produce anti-inflammatory cytokines, induce T regulatory (Treg) cells, and promote tolerance. In mice, DCregs prevent pro-inflammatory responses and induce antigen-specific tolerance. Given these known functions of DCregs, we hypothesize that DCregs will prevent the development of AVP-induced PreE in mice. C57BL/6J females were infused with AVP (24 ng/h) or saline throughout gestation via an osmotic minipump. Bone-marrow-derived DCregs were injected into AVP-infused dams at the time of the pump implantation or on gestational day (GD) 7. The blood pressure of the mice was taken throughout their pregnancy. The maternal urine proteins and TH-associated cytokines in maternal and fetal tissues were measured on GD 18. The treatment with DCregs effectively prevented the elevation of maternal blood pressure, proteinuria, and fetal growth restriction that were observed in AVP-infused dams. Furthermore, we noted a reduction in the pro-inflammatory TH-associated cytokines IFNγ and IL-17, while anti-inflammatory cytokines IL-4, IL-10, and TGFβ showed an increase following DCreg treatment. These outcomes provide strong evidence supporting the potential of DCregs as a valuable therapeutic approach in addressing PreE.
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Affiliation(s)
- Gabrielle Gray
- Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Douglas G. Scroggins
- School of Medicine, Department of Biomedical Sciences, University of Minnesota Duluth, Duluth, MN 55812, USA
| | - Katlin T. Wilson
- School of Medicine, Department of Biomedical Sciences, University of Minnesota Duluth, Duluth, MN 55812, USA
| | - Sabrina M. Scroggins
- School of Medicine, Department of Biomedical Sciences, University of Minnesota Duluth, Duluth, MN 55812, USA
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Human Chorionic Gonadotropin-Stimulated Interleukin-4-Induced-1 (IL4I1) Promotes Human Decidualization via Aryl Hydrocarbon Receptor. Int J Mol Sci 2023; 24:ijms24043163. [PMID: 36834576 PMCID: PMC9959871 DOI: 10.3390/ijms24043163] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/16/2023] [Accepted: 01/20/2023] [Indexed: 02/08/2023] Open
Abstract
Decidualization is necessary for the successful establishment of early pregnancy in rodents and humans. Disturbed decidualization results in recurrent implantation failure, recurrent spontaneous abortion, and preeclampsia. Tryptophan (Trp), one of the essential amino acids in humans, has a positive effect on mammalian pregnancy. Interleukin 4-induced gene 1 (IL4I1) is a recently identified enzyme that can metabolize L-Trp to activate aryl hydrocarbon receptor (AHR). Although IDO1-catalyzed kynurenine (Kyn) from Trp has been shown to enhance human in vitro decidualization via activating AHR, whether IL4I1-catalyzed metabolites of Trp are involved in human decidualization is still unknown. In our study, human chorionic gonadotropin stimulates IL4I1 expression and secretion from human endometrial epithelial cells through ornithine decarboxylase-induced putrescine production. Either IL4I1-catalyzed indole-3-pyruvic acid (I3P) or its metabolite indole-3-aldehyde (I3A) from Trp is able to induce human in vitro decidualization by activating AHR. As a target gene of AHR, Epiregulin induced by I3P and I3A promotes human in vitro decidualization. Our study indicates that IL4I1-catalyzed metabolites from Trp can enhance human in vitro decidualization through AHR-Epiregulin pathway.
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Muller AJ, Mondal A, Dey S, Prendergast GC. IDO1 and inflammatory neovascularization: bringing new blood to tumor-promoting inflammation. Front Oncol 2023; 13:1165298. [PMID: 37182174 PMCID: PMC10172587 DOI: 10.3389/fonc.2023.1165298] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 04/12/2023] [Indexed: 05/16/2023] Open
Abstract
In parallel with the genetic and epigenetic changes that accumulate in tumor cells, chronic tumor-promoting inflammation establishes a local microenvironment that fosters the development of malignancy. While knowledge of the specific factors that distinguish tumor-promoting from non-tumor-promoting inflammation remains inchoate, nevertheless, as highlighted in this series on the 'Hallmarks of Cancer', it is clear that tumor-promoting inflammation is essential to neoplasia and metastatic progression making identification of specific factors critical. Studies of immunometabolism and inflamometabolism have revealed a role for the tryptophan catabolizing enzyme IDO1 as a core element in tumor-promoting inflammation. At one level, IDO1 expression promotes immune tolerance to tumor antigens, thereby helping tumors evade adaptive immune control. Additionally, recent findings indicate that IDO1 also promotes tumor neovascularization by subverting local innate immunity. This newly recognized function for IDO1 is mediated by a unique myeloid cell population termed IDVCs (IDO1-dependent vascularizing cells). Initially identified in metastatic lesions, IDVCs may exert broader effects on pathologic neovascularization in various disease settings. Mechanistically, induction of IDO1 expression in IDVCs by the inflammatory cytokine IFNγ blocks the antagonistic effect of IFNγ on neovascularization by stimulating the expression of IL6, a powerful pro-angiogenic cytokine. By contributing to vascular access, this newly ascribed function for IDO1 aligns with its involvement in other cancer hallmark functionalities, (tumor-promoting inflammation, immune escape, altered cellular metabolism, metastasis), which may stem from an underlying role in normal physiological functions such as wound healing and pregnancy. Understanding the nuances of how IDO1 involvement in these cancer hallmark functionalities varies between different tumor settings will be crucial to the future development of successful IDO1-directed therapies.
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Affiliation(s)
- Alexander J. Muller
- Lankenau Institute for Medical Research, Wynnewood, PA, United States
- Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, United States
- *Correspondence: Alexander J. Muller,
| | - Arpita Mondal
- Arbutus Biopharma, Inc., Warminster, PA, United States
| | - Souvik Dey
- Wuxi Advanced Therapeutics, Inc., Philadelphia, PA, United States
| | - George C. Prendergast
- Lankenau Institute for Medical Research, Wynnewood, PA, United States
- Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, United States
- Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA, United States
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9
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Marić I, Contrepois K, Moufarrej MN, Stelzer IA, Feyaerts D, Han X, Tang A, Stanley N, Wong RJ, Traber GM, Ellenberger M, Chang AL, Fallahzadeh R, Nassar H, Becker M, Xenochristou M, Espinosa C, De Francesco D, Ghaemi MS, Costello EK, Culos A, Ling XB, Sylvester KG, Darmstadt GL, Winn VD, Shaw GM, Relman DA, Quake SR, Angst MS, Snyder MP, Stevenson DK, Gaudilliere B, Aghaeepour N. Early prediction and longitudinal modeling of preeclampsia from multiomics. PATTERNS (NEW YORK, N.Y.) 2022; 3:100655. [PMID: 36569558 PMCID: PMC9768681 DOI: 10.1016/j.patter.2022.100655] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 09/28/2022] [Accepted: 11/11/2022] [Indexed: 12/13/2022]
Abstract
Preeclampsia is a complex disease of pregnancy whose physiopathology remains unclear. We developed machine-learning models for early prediction of preeclampsia (first 16 weeks of pregnancy) and over gestation by analyzing six omics datasets from a longitudinal cohort of pregnant women. For early pregnancy, a prediction model using nine urine metabolites had the highest accuracy and was validated on an independent cohort (area under the receiver-operating characteristic curve [AUC] = 0.88, 95% confidence interval [CI] [0.76, 0.99] cross-validated; AUC = 0.83, 95% CI [0.62,1] validated). Univariate analysis demonstrated statistical significance of identified metabolites. An integrated multiomics model further improved accuracy (AUC = 0.94). Several biological pathways were identified including tryptophan, caffeine, and arachidonic acid metabolisms. Integration with immune cytometry data suggested novel associations between immune and proteomic dynamics. While further validation in a larger population is necessary, these encouraging results can serve as a basis for a simple, early diagnostic test for preeclampsia.
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Affiliation(s)
- Ivana Marić
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Corresponding author
| | - Kévin Contrepois
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Mira N. Moufarrej
- Departments of Bioengineering and Applied Physics, Stanford University and Chan Zuckerberg Biohub, Stanford, CA 94305, USA
| | - Ina A. Stelzer
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Dorien Feyaerts
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Xiaoyuan Han
- University of the Pacific, Arthur A. Dugoni School of Dentistry, San Francisco, CA 94103, USA
| | - Andy Tang
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Natalie Stanley
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Ronald J. Wong
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Gavin M. Traber
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Mathew Ellenberger
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Alan L. Chang
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Ramin Fallahzadeh
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Huda Nassar
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Martin Becker
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Maria Xenochristou
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Camilo Espinosa
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Davide De Francesco
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Mohammad S. Ghaemi
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Digital Technologies Research Centre, National Research Council Canada, Toronto, Canada
| | - Elizabeth K. Costello
- Departments of Medicine, and of Microbiology & Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Anthony Culos
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Xuefeng B. Ling
- Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Karl G. Sylvester
- Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Gary L. Darmstadt
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Virginia D. Winn
- Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Gary M. Shaw
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - David A. Relman
- Departments of Medicine, and of Microbiology & Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
- Infectious Diseases Section, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA 94304, USA
| | - Stephen R. Quake
- Departments of Bioengineering and Applied Physics, Stanford University and Chan Zuckerberg Biohub, Stanford, CA 94305, USA
| | - Martin S. Angst
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Michael P. Snyder
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - David K. Stevenson
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Brice Gaudilliere
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Nima Aghaeepour
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
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10
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Bodis J, Farkas B, Nagy B, Kovacs K, Sulyok E. The Role of L-Arginine-NO System in Female Reproduction: A Narrative Review. Int J Mol Sci 2022; 23:14908. [PMID: 36499238 PMCID: PMC9735906 DOI: 10.3390/ijms232314908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 11/23/2022] [Accepted: 11/24/2022] [Indexed: 11/30/2022] Open
Abstract
Accumulating evidence are available on the involvement of l-arginine-nitric oxide (NO) system in complex biological processes and numerous clinical conditions. Particular attention was made to reveal the association of l-arginine and methylarginines to outcome measures of women undergoing in vitro fertilization (IVF). This review attempts to summarize the expression and function of the essential elements of this system with particular reference to the different stages of female reproduction. A literature search was performed on the PubMed and Google Scholar systems. Publications were selected for evaluation according to the results presented in the Abstract. The regulatory role of NO during the period of folliculogenesis, oocyte maturation, fertilization, embryogenesis, implantation, placentation, pregnancy, and delivery was surveyed. The major aspects of cellular l-arginine uptake via cationic amino acid transporters (CATs), arginine catabolism by nitric oxide synthases (NOSs) to NO and l-citrulline and by arginase to ornithine, and polyamines are presented. The importance of NOS inhibition by methylated arginines and the redox-sensitive elements of the process of NO generation are also shown. The l-arginine-NO system plays a crucial role in all stages of female reproduction. Insufficiently low or excessively high rates of NO generation may have adverse influences on IVF outcome.
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Affiliation(s)
- Jozsef Bodis
- Department of Obstetrics and Gynecology, University of Pecs School of Medicine, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
| | - Balint Farkas
- Department of Obstetrics and Gynecology, University of Pecs School of Medicine, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
| | - Bernadett Nagy
- Department of Obstetrics and Gynecology, University of Pecs School of Medicine, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
| | - Kalman Kovacs
- Department of Obstetrics and Gynecology, University of Pecs School of Medicine, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
| | - Endre Sulyok
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Faculty of Health Sciences, University of Pécs, 7621 Pécs, Hungary
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11
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Dupont V, Berg AH, Yamashita M, Huang C, Covarrubias AE, Ali S, Stotland A, Van Eyk JE, Jim B, Thadhani R, Karumanchi SA. Impaired renal reserve contributes to preeclampsia via the kynurenine and soluble fms-like tyrosine kinase 1 pathway. J Clin Invest 2022; 132:158346. [PMID: 35943814 PMCID: PMC9566901 DOI: 10.1172/jci158346] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 08/02/2022] [Indexed: 11/17/2022] Open
Abstract
To understand how kidney donation leads to an increased risk of preeclampsia, we studied pregnant outbred mice with prior uninephrectomy and compared them with sham-operated littermates carrying both kidneys. During pregnancy, uninephrectomized (UNx) mice failed to achieve a physiological increase in the glomerular filtration rate and during late gestation developed hypertension, albuminuria, glomerular endothelial damage, and excess placental production of soluble fms-like tyrosine kinase 1 (sFLT1), an antiangiogenic protein implicated in the pathogenesis of preeclampsia. Maternal hypertension in UNx mice was associated with low plasma volumes, an increased rate of fetal resorption, impaired spiral artery remodeling, and placental ischemia. To evaluate potential mechanisms, we studied plasma metabolite changes using mass spectrometry and noted that l-kynurenine, a metabolite of l-tryptophan, was upregulated approximately 3-fold during pregnancy when compared with prepregnant concentrations in the same animals, consistent with prior reports suggesting a protective role for l-kynurenine in placental health. However, UNx mice failed to show upregulation of l-kynurenine during pregnancy; furthermore, when UNx mice were fed l-kynurenine in drinking water throughout pregnancy, their preeclampsia-like state was rescued, including a reversal of placental ischemia and normalization of sFLT1 levels. In aggregate, we provide a mechanistic basis for how impaired renal reserve and the resulting failure to upregulate l-kynurenine during pregnancy can lead to impaired placentation, placental hypoperfusion, an antiangiogenic state, and subsequent preeclampsia.
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Affiliation(s)
- Vincent Dupont
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA.,EA-3801, Université de Reims Champagne-Ardenne, Reims, France
| | | | | | | | | | - Shafat Ali
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Aleksandr Stotland
- Department of Biomedical Sciences and Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Jennifer E. Van Eyk
- Department of Biomedical Sciences and Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Belinda Jim
- Department of Medicine, Jacobi Medical Center, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Ravi Thadhani
- Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - S. Ananth Karumanchi
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA
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12
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Marsden PA. The curious case of tryptophan in pregnancy. J Clin Invest 2022; 132:164219. [PMID: 36250464 PMCID: PMC9566892 DOI: 10.1172/jci164219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
For patients and caregivers to be fully informed about how living organ donation or prior kidney injury affects future health, we need to better understand the role of kidney reserve in physiological adaptation, especially during pregnancy. Importantly, epidemiological studies reason that live kidney donors are at increased risk for developing preeclampsia, a hypertensive disorder of pregnancy with serious implications for maternal and fetal health. Despite the import of this finding, the mechanistic basis for this increased risk is not understood. In this issue of the JCI, Dupont, Berg, and co-authors provide strong evidence that impaired placental perfusion, placental ischemia, increased soluble fms-like tyrosine kinase 1 (sFLT1), and a maternal preeclampsia–like phenotype are associated with an inability to upregulate the l-tryptophan–derived l-kynurenine pathway during pregnancy in mice with blunted renal reserve. These surprising revelations underscore the curious quiddity of l-tryptophan.
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Affiliation(s)
- Philip A. Marsden
- Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
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13
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Exploration of urinary metabolite dynamicity for early detection of pregnancy in water buffaloes. Sci Rep 2022; 12:16295. [PMID: 36175438 PMCID: PMC9523026 DOI: 10.1038/s41598-022-20298-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 09/12/2022] [Indexed: 11/29/2022] Open
Abstract
Early and precise pregnancy diagnosis can reduce the calving interval by minimizing postpartum period. The present study explored the differential urinary metabolites between pregnant and non-pregnant Murrah buffaloes (Bubalus bubalis) during early gestation to identify potential pregnancy detection biomarkers. Urine samples were collected on day 0, 10, 18, 35 and 42 of gestation from the pregnant (n = 6) and on day 0, 10 and 18 post-insemination from the non-pregnant (n = 6) animals. 1H-NMR-based untargeted metabolomics followed by multivariate analysis initially identified twenty-four differentially expressed metabolites, among them 3-Hydroxykynurenine, Anthranilate, Tyrosine and 5-Hydroxytryptophan depicted consistent trends and matched the selection criteria of potential biomarkers. Predictive ability of these individual biomarkers through ROC curve analyses yielded AUC values of 0.6–0.8. Subsequently, a logistic regression model was constructed using the most suitable metabolite combination to improve diagnostic accuracy. The combination of Anthranilate, 3-Hydroxykynurenine, and Tyrosine yielded the best AUC value of 0.804. Aromatic amino acid biosynthesis, Tryptophan metabolism, Phenylalanine and Tyrosine metabolism were identified as potential pathway modulations during early gestation. The identified biomarkers were either precursors or products of these metabolic pathways, thus justifying their relevance. The study facilitates precise non-invassive urinary metabolite-based pen-side early pregnancy diagnostics in buffaloes, eminently before 21 days post-insemination.
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14
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Aslanian-Kalkhoran L, Esparvarinha M, Nickho H, Aghebati-Maleki L, Heris JA, Danaii S, Yousefi M. Understanding main pregnancy complications through animal models. J Reprod Immunol 2022; 153:103676. [PMID: 35914401 DOI: 10.1016/j.jri.2022.103676] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 06/27/2022] [Accepted: 07/21/2022] [Indexed: 10/16/2022]
Abstract
Since human pregnancy is an inefficient process, achieving desired and pleasant outcome of pregnancy - the birth of a healthy and fit baby - is the main goal in any pregnancy. Spontaneous pregnancy failure is actually the most common complication of pregnancy and Most of these pregnancy losses are not known. Animal models have been utilized widely to investigate the system of natural biological adaptation to pregnancy along with increasing our comprehension of the most important hereditary and non-hereditary factors that contribute to pregnancy disorders. We use model organisms because their complexity better reproduces the human condition. A useful animal model for the disease should be pathologically similar to the disease conditions in humans. Animal models deserve a place in research because of the ethical limitations that apply to pregnant women's experiments. The present review provides insights into the overall risk factors involved in recurrent miscarriage, recurrent implant failure and preeclampsia and animal models developed to help researchers identify the source of miscarriage and the best research and treatment strategy for women with Repeated miscarriage and implant failure.
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Affiliation(s)
- Lida Aslanian-Kalkhoran
- Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran; Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Mojgan Esparvarinha
- Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran; Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Hamid Nickho
- Department of Immuunology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Islamic Republic of Iran; Immunology Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Leili Aghebati-Maleki
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Javad Ahmadian Heris
- Department of Allergy and Clinical Immunology, Pediatric Hospital, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Shahla Danaii
- Gynecology Department, Eastern Azerbaijan ACECR ART Centre, Eastern Azerbaijan Branch of ACECR, Tabriz, Islamic Republic of Iran
| | - Mehdi Yousefi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran.
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15
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Ala M, Eftekhar SP. The Footprint of Kynurenine Pathway in Cardiovascular Diseases. Int J Tryptophan Res 2022; 15:11786469221096643. [PMID: 35784899 PMCID: PMC9248048 DOI: 10.1177/11786469221096643] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 03/28/2022] [Indexed: 12/30/2022] Open
Abstract
Kynurenine pathway is the main route of tryptophan metabolism and produces several metabolites with various biologic properties. It has been uncovered that several cardiovascular diseases are associated with the overactivation of kynurenine pathway and kynurenine and its metabolites have diagnostic and prognostic value in cardiovascular diseases. Furthermore, it was found that several kynurenine metabolites can differently affect cardiovascular health. For instance, preclinical studies have shown that kynurenine, xanthurenic acid and cis-WOOH decrease blood pressure; kynurenine and 3-hydroxyanthranilic acid prevent atherosclerosis; kynurenic acid supplementation and kynurenine 3-monooxygenase (KMO) inhibition improve the outcome of stroke. Indoleamine 2,3-dioxygenase (IDO) overactivity and increased kynurenine levels improve cardiac and vascular transplantation outcomes, whereas exacerbating the outcome of myocardial ischemia, post-ischemic myocardial remodeling, and abdominal aorta aneurysm. IDO inhibition and KMO inhibition are also protective against viral myocarditis. In addition, dysregulation of kynurenine pathway is observed in several conditions such as senescence, depression, diabetes, chronic kidney disease (CKD), cirrhosis, and cancer closely connected to cardiovascular dysfunction. It is worth defining the exact effect of each metabolite of kynurenine pathway on cardiovascular health. This narrative review is the first review that separately discusses the involvement of kynurenine pathway in different cardiovascular diseases and dissects the underlying molecular mechanisms.
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Affiliation(s)
- Moein Ala
- School of Medicine, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Seyed Parsa Eftekhar
- Student Research Committee, Health Research Center, Babol University of Medical Sciences, Babol, Iran
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16
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Unbalanced IDO1/IDO2 Endothelial Expression and Skewed Keynurenine Pathway in the Pathogenesis of COVID-19 and Post-COVID-19 Pneumonia. Biomedicines 2022; 10:biomedicines10061332. [PMID: 35740354 PMCID: PMC9220124 DOI: 10.3390/biomedicines10061332] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 05/29/2022] [Accepted: 06/02/2022] [Indexed: 11/17/2022] Open
Abstract
Despite intense investigation, the pathogenesis of COVID-19 and the newly defined long COVID-19 syndrome are not fully understood. Increasing evidence has been provided of metabolic alterations characterizing this group of disorders, with particular relevance of an activated tryptophan/kynurenine pathway as described in this review. Recent histological studies have documented that, in COVID-19 patients, indoleamine 2,3-dioxygenase (IDO) enzymes are differentially expressed in the pulmonary blood vessels, i.e., IDO1 prevails in early/mild pneumonia and in lung tissues from patients suffering from long COVID-19, whereas IDO2 is predominant in severe/fatal cases. We hypothesize that IDO1 is necessary for a correct control of the vascular tone of pulmonary vessels, and its deficiency in COVID-19 might be related to the syndrome’s evolution toward vascular dysfunction. The complexity of this scenario is discussed in light of possible therapeutic manipulations of the tryptophan/kynurenine pathway in COVID-19 and post-acute COVID-19 syndromes.
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17
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Reed JM, Spinelli P, Falcone S, He M, Goeke CM, Susiarjo M. Evaluating the Effects of BPA and TBBPA Exposure on Pregnancy Loss and Maternal-Fetal Immune Cells in Mice. ENVIRONMENTAL HEALTH PERSPECTIVES 2022; 130:37010. [PMID: 35343813 PMCID: PMC8959013 DOI: 10.1289/ehp10640] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/22/2022] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Bisphenol A (BPA) exposure has been linked to miscarriages and pregnancy complications in humans. In contrast, the potential reproductive toxicity of BPA analogs, including tetrabromobisphenol A (TBBPA), is understudied. Furthermore, although environmental exposure has been linked to altered immune mediators, the effects of BPA and TBBPA on maternal-fetal immune tolerance during pregnancy have not been studied. The present study investigated whether exposure resulted in higher rates of pregnancy loss in mice, lower number of regulatory T cells (Tregs), and lower indoleamine 2,3 deoxygenase 1 (Ido1) expression, which provided evidence for mechanisms related to immune tolerance in pregnancy. OBJECTIVES The purpose of this investigation was to characterize the effects of BPA and TBBPA exposure on pregnancy loss in mice and to study the percentage and number of Tregs and Ido1 expression and DNA methylation. METHODS Analysis of fetal resorption and quantification of maternal and fetal immune cells by flow cytometry were performed in allogeneic and syngeneic pregnancies. Ido1 mRNA and protein expression, and DNA methylation in placentas from control and BPA- and TBBPA-exposed mice were analyzed using real-time quantitative polymerase chain reaction, immunofluorescence, and bisulfite sequencing analyses. RESULTS BPA and TBBPA exposure resulted in higher rates of hemorrhaging in early allogeneic, but not syngeneic, conceptuses. In allogeneic pregnancies, BPA and TBBPA exposure was associated with higher fetal resorption rates and lower maternal Treg number. Importantly, these differences were associated with lower IDO1 protein expression in trophoblast giant cells and higher mean percentage Ido1 DNA methylation in embryonic day 9.5 placentas from BPA- and TBBPA-exposed mice. DISCUSSION BPA- and TBBPA-induced pregnancy loss in mice was associated with perturbed IDO1-dependent maternal immune tolerance. https://doi.org/10.1289/EHP10640.
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Affiliation(s)
- Jasmine M. Reed
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Philip Spinelli
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Sierra Falcone
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Miao He
- Department of Pharmacology and Physiology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Calla M. Goeke
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Martha Susiarjo
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
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18
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Aguilera N, Salas-Pérez F, Ortíz M, Álvarez D, Echiburú B, Maliqueo M. Rodent models in placental research. Implications for fetal origins of adult disease. Anim Reprod 2022; 19:e20210134. [PMID: 35493783 PMCID: PMC9037606 DOI: 10.1590/1984-3143-ar2021-0134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 03/21/2022] [Indexed: 11/22/2022] Open
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19
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Broekhuizen M, Danser AHJ, Reiss IKM, Merkus D. The Function of the Kynurenine Pathway in the Placenta: A Novel Pharmacotherapeutic Target? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182111545. [PMID: 34770059 PMCID: PMC8582682 DOI: 10.3390/ijerph182111545] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/26/2021] [Accepted: 10/30/2021] [Indexed: 12/21/2022]
Abstract
(L-)tryptophan is metabolized via the kynurenine pathway into several kynurenine metabolites with distinct functions. Dysfunction of the kynurenine pathway can lead to impairments in vascular regulation, immune regulation, and tolerance. The first and rate limiting enzyme of this pathway, indoleamine 2,3-dioxygenase (IDO), is highly expressed in the placenta and reduced in placentas from complicated pregnancies. IDO is essential during pregnancy, as IDO inhibition in pregnant mice resulted in fetal loss. However, the exact function of placental IDO, as well as its exact placental localization, remain controversial. This review identified that two isoforms of IDO; IDO1 and IDO2, are differently expressed between placental cells, suggesting spatial segregation. Furthermore, this review summarizes how the placental kynurenine pathway is altered in pregnancy complications, including recurrent miscarriage, preterm birth, preeclampsia, and fetal growth restriction. Importantly, we describe that these alterations do not affect maternally circulating metabolite concentrations, suggesting that the kynurenine pathway functions as a local signaling pathway. In the placenta, it is an important source of de novo placental NAD+ synthesis and regulates fetal tryptophan and kynurenine metabolite supply. Therefore, kynurenine pathway interventions might provide opportunities to treat pregnancy complications, and this review discusses how such treatment could affect placental function and pregnancy development.
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Affiliation(s)
- Michelle Broekhuizen
- Division of Pharmacology and Vascular Medicine, Department of Internal Medicine, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands;
- Division of Neonatology, Department of Pediatrics, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands;
- Division of Experimental Cardiology, Department of Cardiology, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands;
- Correspondence:
| | - A. H. Jan Danser
- Division of Pharmacology and Vascular Medicine, Department of Internal Medicine, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands;
| | - Irwin K. M. Reiss
- Division of Neonatology, Department of Pediatrics, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands;
| | - Daphne Merkus
- Division of Experimental Cardiology, Department of Cardiology, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands;
- Walter Brendel Center of Experimental Medicine, University Clinic Munich, LMU Munich, 81377 Munich, Germany
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20
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Waker CA, Kaufman MR, Brown TL. Current State of Preeclampsia Mouse Models: Approaches, Relevance, and Standardization. Front Physiol 2021; 12:681632. [PMID: 34276401 PMCID: PMC8284253 DOI: 10.3389/fphys.2021.681632] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 05/24/2021] [Indexed: 12/14/2022] Open
Abstract
Preeclampsia (PE) is a multisystemic, pregnancy-specific disorder and a leading cause of maternal and fetal death. PE is also associated with an increased risk for chronic morbidities later in life for mother and offspring. Abnormal placentation or placental function has been well-established as central to the genesis of PE; yet much remains to be determined about the factors involved in the development of this condition. Despite decades of investigation and many clinical trials, the only definitive treatment is parturition. To better understand the condition and identify potential targets preclinically, many approaches to simulate PE in mice have been developed and include mixed mouse strain crosses, genetic overexpression and knockout, exogenous agent administration, surgical manipulation, systemic adenoviral infection, and trophoblast-specific gene transfer. These models have been useful to investigate how biological perturbations identified in human PE are involved in the generation of PE-like symptoms and have improved the understanding of the molecular mechanisms underpinning the human condition. However, these approaches were characterized by a wide variety of physiological endpoints, which can make it difficult to compare effects across models and many of these approaches have aspects that lack physiological relevance to this human disorder and may interfere with therapeutic development. This report provides a comprehensive review of mouse models that exhibit PE-like symptoms and a proposed standardization of physiological characteristics for analysis in murine models of PE.
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Affiliation(s)
- Christopher A Waker
- Department of Neuroscience, Cell Biology, and Physiology, Boonshoft School of Medicine, Wright State University, Dayton, OH, United States
| | - Melissa R Kaufman
- Department of Neuroscience, Cell Biology, and Physiology, Boonshoft School of Medicine, Wright State University, Dayton, OH, United States
| | - Thomas L Brown
- Department of Neuroscience, Cell Biology, and Physiology, Boonshoft School of Medicine, Wright State University, Dayton, OH, United States
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21
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Yang M, Huang G, Qian H, Wang J, Zhao S, Li S, Yuan Y. Progesterone decreased indoleamine 2,3-dioxygenase 1(IDO1) expression in early pregnancy chorionic villi and decidua. Autoimmunity 2021; 54:156-162. [PMID: 33792452 DOI: 10.1080/08916934.2021.1907572] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Indoleamine 2,3-dioxygenase1(IDO1) is one of the most important proteins in protect the embryos from the mother's immune system during pregnancy. However, the regulation of the protein expression at the maternal-foetal interface is not fully known. We aimed to study the regulation of IDO1 expression by progesterone in villi and decidua of in early pregnancy. Fifty cases of early pregnancy women's villi and decidua were collected. Tissue explants of chorionic villi and the decidua were cultured in media containing in different concentrations of progesterone, in the presence or absence of mifepristone. Western blot analysis and immunofluorescence were used to detect the expression of IDO1 in chorionic villi and decidua in cultured tissues. IDO1 protein was identified in chorionic villi and decidua tissues of normal pregnant women, and the expression of IDO1in the decidua was significantly higher than those in chorionic villi. Progesterone decreased IDO1 expression in early pregnancy chorionic villi and decidua, and mifepristone, as the progesterone inhibitor, reverted this effect. In normal physiological state of pregnancy, progesterone may be involved in the regulation of immune tolerance by negative regulation of IDO1 expression at maternal foetal interface. Progesterone may down-regulate IDO1 expression during early pregnancy.
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Affiliation(s)
- Minyan Yang
- Hospital Affiliated 5 to Nantong University (Taizhou People's Hospital), Taizhou, China
| | - Guanyou Huang
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Hua Qian
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Jun Wang
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Shuyun Zhao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Shixiang Li
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Yan Yuan
- Guizhou Provincial People's Hospital, Guiyang, China
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22
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Angoa-Pérez M, Kuhn DM. Evidence for Modulation of Substance Use Disorders by the Gut Microbiome: Hidden in Plain Sight. Pharmacol Rev 2021; 73:571-596. [PMID: 33597276 PMCID: PMC7896134 DOI: 10.1124/pharmrev.120.000144] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The gut microbiome modulates neurochemical function and behavior and has been implicated in numerous central nervous system (CNS) diseases, including developmental, neurodegenerative, and psychiatric disorders. Substance use disorders (SUDs) remain a serious threat to the public well-being, yet gut microbiome involvement in drug abuse has received very little attention. Studies of the mechanisms underlying SUDs have naturally focused on CNS reward circuits. However, a significant body of research has accumulated over the past decade that has unwittingly provided strong support for gut microbiome participation in drug reward. β-Lactam antibiotics have been employed to increase glutamate transporter expression to reverse relapse-induced release of glutamate. Sodium butyrate has been used as a histone deacetylase inhibitor to prevent drug-induced epigenetic alterations. High-fat diets have been used to alter drug reward because of the extensive overlap of the circuitry mediating them. This review article casts these approaches in a different light and makes a compelling case for gut microbiome modulation of SUDs. Few factors alter the structure and composition of the gut microbiome more than antibiotics and a high-fat diet, and butyrate is an endogenous product of bacterial fermentation. Drugs such as cocaine, alcohol, opiates, and psychostimulants also modify the gut microbiome. Therefore, their effects must be viewed on a complex background of cotreatment-induced dysbiosis. Consideration of the gut microbiome in SUDs should have the beneficial effects of expanding the understanding of SUDs and aiding in the design of new therapies based on opposing the effects of abused drugs on the host's commensal bacterial community. SIGNIFICANCE STATEMENT: Proposed mechanisms underlying substance use disorders fail to acknowledge the impact of drugs of abuse on the gut microbiome. β-Lactam antibiotics, sodium butyrate, and high-fat diets are used to modify drug seeking and reward, overlooking the notable capacity of these treatments to alter the gut microbiome. This review aims to stimulate research on substance abuse-gut microbiome interactions by illustrating how drugs of abuse share with antibiotics, sodium butyrate, and fat-laden diets the ability to modify the host microbial community.
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Affiliation(s)
- Mariana Angoa-Pérez
- Research and Development Service, John D. Dingell VA Medical Center, and Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan
| | - Donald M Kuhn
- Research and Development Service, John D. Dingell VA Medical Center, and Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan
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23
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Hoffmann D, Dvorakova T, Schramme F, Stroobant V, Van den Eynde BJ. Tryptophan 2,3-Dioxygenase Expression Identified in Murine Decidual Stromal Cells Is Not Essential for Feto-Maternal Tolerance. Front Immunol 2020; 11:601759. [PMID: 33363543 PMCID: PMC7752949 DOI: 10.3389/fimmu.2020.601759] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 10/12/2020] [Indexed: 11/13/2022] Open
Abstract
Indoleamine 2,3-dioxygenase 1 (IDO1) and tryptophan 2,3-dioxygenase (TDO) catalyze the rate-limiting step of tryptophan catabolism along the kynurenine pathway, which has important immuno suppressive properties, particularly in tumor cells and dendritic cells. The prominent expression of IDO1 in the placenta also suggested a role in preventing immune rejection of fetal tissues, and pharmacological inhibition of IDO1 induced abortion of allogeneic fetuses in mice. However, this was later challenged by the lack of rejection of allogeneic fetuses in IDO1-KO mice, suggesting that other mechanisms may compensate for IDO1 deficiency. Here we investigated whether TDO could contribute to feto-maternal tolerance and compensate for IDO1 deficiency in IDO1-KO mice. Expression of TDO mRNA was previously detected in placental tissues. We developed a new chimeric rabbit anti-TDO antibody to confirm TDO expression at the protein level and identify the positive cell type by immunohistochemistry in murine placenta. We observed massive TDO expression in decidual stromal cells, starting at day E3.5, peaking at day E6.5 then declining rapidly while remaining detectable until gestation end. IDO1 was also induced in decidual stromal cells, but only at a later stage of gestation when TDO expression declined. To determine whether TDO contributed to feto-maternal tolerance, we mated TDO-KO and double IDO1-TDO-KO females with allogeneic males. However, we did not observe reduced fertility. These results suggest that, despite its expression in decidual stromal cells, TDO is not a dominant mechanism of feto-maternal tolerance able to compensate for the absence of IDO1. Redundant additional mechanisms of immunosuppression likely take over in these KO mice. The massive expression of TDO during decidualization might suggest a role of TDO in angiogenesis or vessel tonicity, as previously described for IDO1.
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Affiliation(s)
- Delia Hoffmann
- Ludwig Institute for Cancer Research, Brussels, Belgium.,de Duve Institute, UCLouvain, Brussels, Belgium
| | - Tereza Dvorakova
- Ludwig Institute for Cancer Research, Brussels, Belgium.,de Duve Institute, UCLouvain, Brussels, Belgium
| | - Florence Schramme
- Ludwig Institute for Cancer Research, Brussels, Belgium.,de Duve Institute, UCLouvain, Brussels, Belgium
| | - Vincent Stroobant
- Ludwig Institute for Cancer Research, Brussels, Belgium.,de Duve Institute, UCLouvain, Brussels, Belgium
| | - Benoit J Van den Eynde
- Ludwig Institute for Cancer Research, Brussels, Belgium.,de Duve Institute, UCLouvain, Brussels, Belgium.,Walloon Excellence in Life Sciences and Biotechnology, Brussels, Belgium
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24
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Turbeville HR, Sasser JM. Preeclampsia beyond pregnancy: long-term consequences for mother and child. Am J Physiol Renal Physiol 2020; 318:F1315-F1326. [PMID: 32249616 PMCID: PMC7311709 DOI: 10.1152/ajprenal.00071.2020] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/02/2020] [Accepted: 04/02/2020] [Indexed: 01/26/2023] Open
Abstract
Preeclampsia is defined as new-onset hypertension after the 20th wk of gestation along with evidence of maternal organ failure. Rates of preeclampsia have steadily increased over the past 30 yr, affecting ∼4% of pregnancies in the United States and causing a high economic burden (22, 69). The pathogenesis is multifactorial, with acknowledged contributions by placental, vascular, renal, and immunological dysfunction. Treatment is limited, commonly using symptomatic management and/or early delivery of the fetus (6). Along with significant peripartum morbidity and mortality, current research continues to demonstrate that the consequences of preeclampsia extend far beyond preterm delivery. It has lasting effects for both mother and child, resulting in increased susceptibility to hypertension and chronic kidney disease (45, 54, 115, 116), yielding lifelong risk to both individuals. This review discusses recent guideline updates and recommendations along with current research on these long-term consequences of preeclampsia.
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Affiliation(s)
- Hannah R Turbeville
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Jennifer M Sasser
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
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25
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Spinelli P, Latchney SE, Reed JM, Fields A, Baier BS, Lu X, McCall MN, Murphy SP, Mak W, Susiarjo M. Identification of the novel Ido1 imprinted locus and its potential epigenetic role in pregnancy loss. Hum Mol Genet 2019; 28:662-674. [PMID: 30403776 DOI: 10.1093/hmg/ddy383] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 10/29/2018] [Indexed: 11/14/2022] Open
Abstract
Previous studies show that aberrant tryptophan catabolism reduces maternal immune tolerance and adversely impacts pregnancy outcomes. Tryptophan depletion in pregnancy is facilitated by increased activity of tryptophan-depleting enzymes [i.e. the indolamine-2,3 dioxygenase (IDO)1 and IDO2) in the placenta. In mice, inhibition of IDO1 activity during pregnancy results in fetal loss; however, despite its important role, regulation of Ido1 gene transcription is unknown. The current study shows that the Ido1 and Ido2 genes are imprinted and maternally expressed in mouse placentas. DNA methylation analysis demonstrates that nine CpG sites at the Ido1 promoter constitute a differentially methylated region that is highly methylated in sperm but unmethylated in oocytes. Bisulfite cloning sequencing analysis shows that the paternal allele is hypermethylated while the maternal allele shows low levels of methylation in E9.5 placenta. Further study in E9.5 placentas from the CBA/J X DBA/2 spontaneous abortion mouse model reveals that aberrant methylation of Ido1 is linked to pregnancy loss. DNA methylation analysis in humans shows that IDO1 is hypermethylated in human sperm but partially methylated in placentas, suggesting similar methylation patterns to mouse. Importantly, analysis in euploid placentas from first trimester pregnancy loss reveals that IDO1 methylation significantly differs between the two placenta cohorts, with most CpG sites showing increased percent of methylation in miscarriage placentas. Our study suggests that DNA methylation is linked to regulation of Ido1/IDO1 expression and altered Ido1/IDO1 DNA methylation can adversely influence pregnancy outcomes.
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Affiliation(s)
- Philip Spinelli
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Sarah E Latchney
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Jasmine M Reed
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Ashley Fields
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Brian S Baier
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Xiang Lu
- Department of Biostatistics and Computational Biology, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Matthew N McCall
- Department of Biostatistics and Computational Biology, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA.,Department of Biomedical Genetics, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Shawn P Murphy
- Department of Obstetrics and Gynecology, University of Rochester Medical Center, Rochester, NY, USA
| | - Winifred Mak
- Department of Obstetric Gynecology, Dell Medical School, University of Texas, Austin, TX, USA
| | - Martha Susiarjo
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
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26
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Keaton SA, Heilman P, Bryleva EY, Madaj Z, Krzyzanowski S, Grit J, Miller ES, Jälmby M, Kalapotharakos G, Racicot K, Fazleabas A, Hansson SR, Brundin L. Altered Tryptophan Catabolism in Placentas From Women With Pre-eclampsia. Int J Tryptophan Res 2019; 12:1178646919840321. [PMID: 31007529 PMCID: PMC6457019 DOI: 10.1177/1178646919840321] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 02/10/2019] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND The kynurenine pathway enzymes, breaking down tryptophan, are abundant in placental tissue. These metabolites are involved in immunoregulatory mechanisms, although the role of this pathway in pre-eclampsia (PE) has only begun to be characterized. Here, we determined tryptophan and metabolite levels together with the expression of kynurenine pathway enzymes and inflammatory factors in placental tissue from women with and without PE. METHODS Thirty-six placentas (18 PE and 18 controls) were analyzed for expression of kynurenine pathway enzymes indoleamine-2,3-dioxygenase (IDO1 and 2), tryptophan-2,3-dioxygenase (TDO), kynurenine-3-mono-oxygenase (KMO) and quinolinate phosphoribosyltransferase (QPRT) as well as interleukin (IL)-1β, IL-6, and serum amyloid A (SAA). Tryptophan and kynurenine content were measured using high-pressure liquid chromatography and quinolinic acid was measured using gas chromatography-mass spectrometry. CONCLUSIONS Tryptophan content was reduced in placentas from women with PE. There was an increased kynurenine/tryptophan ratio in placentas from women with PE but no significant change in downstream metabolites. We confirmed a reduction in IDO1 expression and found a compensatory increase in TDO expression in placentas from women with PE. SAA was reduced in PE placentas compared with controls. Our data show that tryptophan content and the inflammatory mediator SAA are both compromised in placentas from women with PE. Further studies on the role of tryptophan catabolism and mediators of inflammation in sustaining healthy immunobiological pathways in the placenta are warranted.
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Affiliation(s)
- Sarah A Keaton
- Department of Physiology, Michigan State
University, East Lansing, MI, USA
- Center for Neurodegenerative Science,
Van Andel Research Institute, Grand Rapids, MI, USA
| | - Patrick Heilman
- Center for Neurodegenerative Science,
Van Andel Research Institute, Grand Rapids, MI, USA
| | - Elena Y Bryleva
- Center for Neurodegenerative Science,
Van Andel Research Institute, Grand Rapids, MI, USA
| | - Zachary Madaj
- Bioinformatics and Biostatistics Core,
Van Andel Research Institute, Grand Rapids, MI, USA
| | - Stanislaw Krzyzanowski
- Center for Neurodegenerative Science,
Van Andel Research Institute, Grand Rapids, MI, USA
| | - Jamie Grit
- Center for Cancer and Cell Biology, Van
Andel Research Institute, Grand Rapids, MI, USA
| | - Emily S Miller
- Feinberg School of Medicine,
Northwestern University, Chicago, IL, USA
| | - Maya Jälmby
- Department of Obstetrics and Gynecology,
Institute of Clinical Sciences, Lund University, Lund, Sweden
| | - Grigoros Kalapotharakos
- Department of Obstetrics and Gynecology,
Institute of Clinical Sciences, Lund University, Lund, Sweden
| | - Karen Racicot
- Department of Obstetrics, Gynecology and
Reproductive Biology, Michigan State University, Grand Rapids, MI, USA
| | - Asgerally Fazleabas
- Department of Obstetrics, Gynecology and
Reproductive Biology, Michigan State University, Grand Rapids, MI, USA
| | - Stefan R Hansson
- Department of Obstetrics and Gynecology,
Institute of Clinical Sciences, Lund University, Lund, Sweden
| | - Lena Brundin
- Center for Neurodegenerative Science,
Van Andel Research Institute, Grand Rapids, MI, USA
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27
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Badawy AAB. Tryptophan Metabolism: A Versatile Area Providing Multiple Targets for Pharmacological Intervention. EGYPTIAN JOURNAL OF BASIC AND CLINICAL PHARMACOLOGY 2019; 9:10.32527/2019/101415. [PMID: 31105983 PMCID: PMC6520243 DOI: 10.32527/2019/101415] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The essential amino acid L-tryptophan (Trp) undergoes extensive metabolism along several pathways, resulting in production of many biologically active metabolites which exert profound effects on physiological processes. The disturbance in Trp metabolism and disposition in many disease states provides a basis for exploring multiple targets for pharmaco-therapeutic interventions. In particular, the kynurenine pathway of Trp degradation is currently at the forefront of immunological research and immunotherapy. In this review, I shall consider mammalian Trp metabolism in health and disease and outline the intervention targets. It is hoped that this account will provide a stimulus for pharmacologists and others to conduct further studies in this rich area of biomedical research and therapeutics.
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28
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Sandgren JA, Deng G, Linggonegoro DW, Scroggins SM, Perschbacher KJ, Nair AR, Nishimura TE, Zhang SY, Agbor LN, Wu J, Keen HL, Naber MC, Pearson NA, Zimmerman KA, Weiss RM, Bowdler NC, Usachev YM, Santillan DA, Potthoff MJ, Pierce GL, Gibson-Corley KN, Sigmund CD, Santillan MK, Grobe JL. Arginine vasopressin infusion is sufficient to model clinical features of preeclampsia in mice. JCI Insight 2018; 3:99403. [PMID: 30282823 DOI: 10.1172/jci.insight.99403] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 08/17/2018] [Indexed: 12/29/2022] Open
Abstract
Copeptin, a marker of arginine vasopressin (AVP) secretion, is elevated throughout human pregnancies complicated by preeclampsia (PE), and AVP infusion throughout gestation is sufficient to induce the major phenotypes of PE in mice. Thus, we hypothesized a role for AVP in the pathogenesis of PE. AVP infusion into pregnant C57BL/6J mice resulted in hypertension, renal glomerular endotheliosis, intrauterine growth restriction, decreased placental growth factor (PGF), altered placental morphology, placental oxidative stress, and placental gene expression consistent with human PE. Interestingly, these changes occurred despite a lack of placental hypoxia or elevations in placental fms-like tyrosine kinase-1 (FLT1). Coinfusion of AVP receptor antagonists and time-restricted infusion of AVP uncovered a mid-gestational role for the AVPR1A receptor in the observed renal pathologies, versus mid- and late-gestational roles for the AVPR2 receptor in the blood pressure and fetal phenotypes. These findings demonstrate that AVP is sufficient to initiate phenotypes of PE in the absence of placental hypoxia, and indicate that AVP may mechanistically (independently, and possibly synergistically with hypoxia) contribute to the development of clinical signs of PE in specific subtypes of human PE. Additionally, they identify divergent and gestational time-specific signaling mechanisms that mediate the development of PE phenotypes in response to AVP.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Donna A Santillan
- Department of Obstetrics & Gynecology.,University of Iowa Hospitals & Clinics Center for Hypertension Research
| | - Matthew J Potthoff
- Department of Pharmacology.,University of Iowa Hospitals & Clinics Center for Hypertension Research.,François M. Abboud Cardiovascular Research Center.,Fraternal Order of Eagles' Diabetes Research Center, and.,Obesity Research & Education Initiative, University of Iowa, Iowa City, Iowa USA
| | - Gary L Pierce
- Department of Health & Human Physiology.,University of Iowa Hospitals & Clinics Center for Hypertension Research.,François M. Abboud Cardiovascular Research Center
| | - Katherine N Gibson-Corley
- Department of Pathology.,University of Iowa Hospitals & Clinics Center for Hypertension Research.,Fraternal Order of Eagles' Diabetes Research Center, and
| | - Curt D Sigmund
- Department of Pharmacology.,University of Iowa Hospitals & Clinics Center for Hypertension Research.,François M. Abboud Cardiovascular Research Center.,Fraternal Order of Eagles' Diabetes Research Center, and.,Obesity Research & Education Initiative, University of Iowa, Iowa City, Iowa USA
| | - Mark K Santillan
- Department of Obstetrics & Gynecology.,University of Iowa Hospitals & Clinics Center for Hypertension Research
| | - Justin L Grobe
- Department of Pharmacology.,University of Iowa Hospitals & Clinics Center for Hypertension Research.,François M. Abboud Cardiovascular Research Center.,Fraternal Order of Eagles' Diabetes Research Center, and.,Obesity Research & Education Initiative, University of Iowa, Iowa City, Iowa USA
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29
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Endothelial indoleamine 2,3-dioxygenase-1 regulates the placental vascular tone and is deficient in intrauterine growth restriction and pre-eclampsia. Sci Rep 2018; 8:5488. [PMID: 29615752 PMCID: PMC5883010 DOI: 10.1038/s41598-018-23896-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 03/21/2018] [Indexed: 11/16/2022] Open
Abstract
Indoleamine 2,3-dioxygenase-1 (IDO1) mediates the degradation of L-tryptophan (L-Trp) and is constitutively expressed in the chorionic vascular endothelium of the human placenta with highest levels in the microvasculature. Given that endothelial expression of IDO1 has been shown to regulate vascular tone and blood pressure in mice under the condition of systemic inflammation, we asked whether IDO1 is also involved in the regulation of placental blood flow and if yes, whether this function is potentially impaired in intrauterine growth restriction (IUGR) and pre-eclampsia (PE). In the large arteries of the chorionic plate L-Trp induced relaxation only after upregulation of IDO1 using interferon gamma and tumor necrosis factor alpha. However, ex vivo placental perfusion of pre-constricted cotyledonic vasculature with L-Trp decreases the vessel back pressure without prior IDO1 induction. Further to this finding, IDO1 protein expression and activity is reduced in IUGR and PE when compared to gestational age–matched control tissue. These data suggest that L-Trp catabolism plays a role in the regulation of placental vascular tone, a finding which is potentially linked to placental and fetal growth. In this context our data suggest that IDO1 deficiency is related to the pathogenesis of IUGR and PE.
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30
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Badawy AAB. Modulation of Tryptophan and Serotonin Metabolism as a Biochemical Basis of the Behavioral Effects of Use and Withdrawal of Androgenic-Anabolic Steroids and Other Image- and Performance-Enhancing Agents. Int J Tryptophan Res 2018; 11:1178646917753422. [PMID: 29487480 PMCID: PMC5821294 DOI: 10.1177/1178646917753422] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 10/29/2017] [Indexed: 01/01/2023] Open
Abstract
Modulation of tryptophan (Trp) metabolism may underpin the behavioral effects of androgenic-anabolic steroids (AAS) and associated image and performance enhancers. Euphoria, arousal, and decreased anxiety observed with moderate use and exercise may involve enhanced cerebral serotonin synthesis and function by increased release of albumin-bound Trp and estrogen-mediated liver Trp 2,3-dioxygenase (TDO) inhibition and enhancement of serotonin function. Aggression, anxiety, depression, personality disorders, and psychosis, observed on withdrawal of AAS or with use of large doses, can be caused by decreased serotonin synthesis due to TDO induction on withdrawal, excess Trp inhibiting the 2 enzymes of serotonin synthesis, and increased cerebral levels of neuroactive kynurenines. Exercise and excessive protein and branched-chain amino acid intakes may aggravate the effects of large AAS dosage. The hypothesis is testable in humans and experimental animals by measuring parameters of Trp metabolism and disposition and related metabolic processes.
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Affiliation(s)
- Abdulla A-B Badawy
- Cardiff School of Health Sciences, Cardiff Metropolitan University, Cardiff, UK
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31
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Scroggins SM, Santillan DA, Lund JM, Sandgren JA, Krotz LK, Hamilton WS, Devor EJ, Davis HA, Pierce GL, Gibson-Corley KN, Sigmund CD, Grobe JL, Santillan MK. Elevated vasopressin in pregnant mice induces T-helper subset alterations consistent with human preeclampsia. Clin Sci (Lond) 2018; 132:419-436. [PMID: 29371289 PMCID: PMC5947858 DOI: 10.1042/cs20171059] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 01/03/2018] [Accepted: 01/04/2018] [Indexed: 01/08/2023]
Abstract
The pathogenesis of preeclampsia (PreE), a hypertensive disorder of pregnancy, involves imbalanced T helper (TH) cell populations and resultant changes in pro- and anti-inflammatory cytokine release. Elevated copeptin (an inert biomarker of arginine vasopressin (AVP)), secretion precedes the development of symptoms in PreE in humans, and infusion of AVP proximal to and throughout gestation is sufficient to initiate cardiovascular and renal phenotypes of PreE in wild-type C57BL/6J mice. We hypothesize that AVP infusion in wild-type mice is sufficient to induce the immune changes observed in human PreE. AVP infusion throughout gestation in mice resulted in increased pro-inflammatory interferon γ (IFNg) (TH1) in the maternal plasma. The TH17-associated cytokine interleukin (IL)-17 was elevated in the maternal plasma, amniotic fluid, and placenta following AVP infusion. Conversely, the TH2-associated anti-inflammatory cytokine IL-4 was decreased in the maternal and fetal kidneys from AVP-infused dams, while IL-10 was decreased in the maternal kidney and all fetal tissues. Collectively, these results demonstrate the sufficiency of AVP to induce the immune changes typical of PreE. We investigated if T cells can respond directly to AVP by evaluating the expression of AVP receptors (AVPRs) on mouse and human CD4+ T cells. Mouse and human T cells expressed AVPR1a, AVPR1b, and AVPR2. The expression of AVPR1a was decreased in CD4+ T cells obtained from PreE-affected women. In total, our data are consistent with a potential initiating role for AVP in the immune dysfunction typical of PreE and identifies putative signaling mechanism(s) for future investigation.
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Affiliation(s)
- Sabrina M Scroggins
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, U.S.A
- Center for Immunology and Immune Based Diseases, University of Iowa, Iowa City, IA 52242, U.S.A
| | - Donna A Santillan
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, U.S.A
- Center for Immunology and Immune Based Diseases, University of Iowa, Iowa City, IA 52242, U.S.A
- Center for Hypertension Research, University of Iowa, Iowa City, IA 52242, U.S.A
| | - Jenna M Lund
- Carver College of Medicine, University of Iowa, Iowa City, IA 52242, U.S.A
| | - Jeremy A Sandgren
- Carver College of Medicine, University of Iowa, Iowa City, IA 52242, U.S.A
- Department of Pharmacology, University of Iowa, Iowa City, IA 52242, U.S.A
| | - Lindsay K Krotz
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, U.S.A
| | - Wendy S Hamilton
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, U.S.A
| | - Eric J Devor
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, U.S.A
| | - Heather A Davis
- Institute for Clinical and Translational Science, University of Iowa, Iowa City, IA 52242, U.S.A
| | - Gary L Pierce
- Center for Hypertension Research, University of Iowa, Iowa City, IA 52242, U.S.A
- Department of Health and Human Physiology, University of Iowa, Iowa City, IA 52242, U.S.A
| | | | - Curt D Sigmund
- Center for Hypertension Research, University of Iowa, Iowa City, IA 52242, U.S.A
- Department of Pharmacology, University of Iowa, Iowa City, IA 52242, U.S.A
| | - Justin L Grobe
- Center for Hypertension Research, University of Iowa, Iowa City, IA 52242, U.S.A.
- Department of Pharmacology, University of Iowa, Iowa City, IA 52242, U.S.A
- Obesity Research and Education Initiative, University of Iowa, Iowa City, IA 52242, U.S.A
- Iowa Neuroscience Institute, University of Iowa, Iowa City, IA 52242, U.S.A
| | - Mark K Santillan
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, IA 52242, U.S.A.
- Center for Immunology and Immune Based Diseases, University of Iowa, Iowa City, IA 52242, U.S.A
- Center for Hypertension Research, University of Iowa, Iowa City, IA 52242, U.S.A
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32
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Chang RQ, Li DJ, Li MQ. The role of indoleamine-2,3-dioxygenase in normal and pathological pregnancies. Am J Reprod Immunol 2017; 79:e12786. [PMID: 29154462 DOI: 10.1111/aji.12786] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 10/30/2017] [Indexed: 12/30/2022] Open
Abstract
The survival of allogeneic fetus during pregnancy contradicts the laws of immune responses. Behind this paradoxical phenomenon, the mechanism is quite complex. Indoleamine-2,3-dioxygenase (IDO) is the first and rate-limiting enzyme of tryptophan catabolism. Emerging evidence shows that IDO is expressed at the maternal-fetal interface, including trophoblast cells, decidual stroma cells, decidual immune cells (eg, natural killer cells, T cells, and macrophages), and vascular endothelial cells of decidua and chorion. Moreover, the expression and activity of IDO are different among non-pregnant, normal pregnant, and pathological pregnant conditions. IDO plays important roles in normal pregnancy through immune suppression and regulation of fetal invasion and circulation. However, the abnormal expression and dysfunction of IDO are associated with some pathological pregnancies (including recurrent spontaneous abortion, preeclampsia, preterm labor, and fetal growth restriction).
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Affiliation(s)
- Rui-Qi Chang
- Laboratory for Reproductive Immunology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China
| | - Da-Jin Li
- Laboratory for Reproductive Immunology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China.,Key Laboratory of Reproduction Regulation of NPFPC, SIPPR, IRD, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
| | - Ming-Qing Li
- Laboratory for Reproductive Immunology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China.,Key Laboratory of Reproduction Regulation of NPFPC, SIPPR, IRD, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
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Xu K, Liu H, Bai M, Gao J, Wu X, Yin Y. Redox Properties of Tryptophan Metabolism and the Concept of Tryptophan Use in Pregnancy. Int J Mol Sci 2017; 18:E1595. [PMID: 28737706 PMCID: PMC5536082 DOI: 10.3390/ijms18071595] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 07/11/2017] [Accepted: 07/19/2017] [Indexed: 12/30/2022] Open
Abstract
During pregnancy, tryptophan (Trp) is required for several purposes, and Trp metabolism varies over time in the mother and fetus. Increased oxidative stress (OS) with high metabolic, energy and oxygen demands during normal pregnancy or in pregnancy-associated disorders has been reported. Taking the antioxidant properties of Trp and its metabolites into consideration, we made four hypotheses. First, the use of Trp and its metabolites is optional based on their antioxidant properties during pregnancy. Second, dynamic Trp metabolism is an accommodation mechanism in response to OS. Third, regulation of Trp metabolism could be used to control/attenuate OS according to variations in Trp metabolism during pregnancy. Fourth, OS-mediated injury could be alleviated by regulation of Trp metabolism in pregnancy-associated disorders. Future studies in normal/abnormal pregnancies and in associated disorders should include measurements of free Trp, total Trp, Trp metabolites, and activities of Trp-degrading enzymes in plasma. Abnormal pregnancies and some associated disorders may be associated with disordered Trp metabolism related to OS. Mounting evidence suggests that the investigation of the use of Trp and its metabolites in pregnancy will be meanful.
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Affiliation(s)
- Kang Xu
- Chinese Academy of Sciences, Institute of Subtropical Agriculture, Key Laboratory of Agroecological Processes in Subtropical Region, Changsha 410125, China.
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha 410125, China.
- Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha 410125, China.
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South Central, Ministry of Agriculture, Changsha 410125, China.
| | - Hongnan Liu
- Chinese Academy of Sciences, Institute of Subtropical Agriculture, Key Laboratory of Agroecological Processes in Subtropical Region, Changsha 410125, China.
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha 410125, China.
- Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha 410125, China.
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South Central, Ministry of Agriculture, Changsha 410125, China.
| | - Miaomiao Bai
- Chinese Academy of Sciences, Institute of Subtropical Agriculture, Key Laboratory of Agroecological Processes in Subtropical Region, Changsha 410125, China.
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha 410125, China.
- Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha 410125, China.
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South Central, Ministry of Agriculture, Changsha 410125, China.
| | - Jing Gao
- Chinese Academy of Sciences, Institute of Subtropical Agriculture, Key Laboratory of Agroecological Processes in Subtropical Region, Changsha 410125, China.
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha 410125, China.
- Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha 410125, China.
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South Central, Ministry of Agriculture, Changsha 410125, China.
| | - Xin Wu
- Chinese Academy of Sciences, Institute of Subtropical Agriculture, Key Laboratory of Agroecological Processes in Subtropical Region, Changsha 410125, China.
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha 410125, China.
- Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha 410125, China.
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South Central, Ministry of Agriculture, Changsha 410125, China.
| | - Yulong Yin
- Chinese Academy of Sciences, Institute of Subtropical Agriculture, Key Laboratory of Agroecological Processes in Subtropical Region, Changsha 410125, China.
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha 410125, China.
- Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha 410125, China.
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South Central, Ministry of Agriculture, Changsha 410125, China.
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The end of the road for the tryptophan depletion concept in pregnancy and infection. Clin Sci (Lond) 2017; 130:1327-33. [PMID: 27358028 PMCID: PMC4926258 DOI: 10.1042/cs20160153] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 03/16/2016] [Indexed: 12/19/2022]
Abstract
We hypothesize that: (1) L-tryptophan (Trp) is greatly utilized and not depleted in pregnancy; (2) fetal tolerance is achieved in part through immunosuppressive kynurenine (Kyn) metabolites produced by the flux of plasma free (non-albumin-bound) Trp down the Kyn pathway; (3) the role of indoleamine 2,3-dioxygenase (IDO) in infection is not related to limitation of an essential amino acid, but is rather associated with stress responses and the production of Kyn metabolites that regulate the activities of antigen presenting cells and T-cells, as well as increased NAD+ synthesis in IDO-expressing cells; (4) Trp depletion is not a host defence mechanism, but is a consequence of Trp utilization. We recommend that future studies in normal and abnormal pregnancies and in patients with infections or cancer should include measurements of plasma free Trp, determinants of Trp binding (albumin and non-esterified fatty acids), total Trp, determinants of activities of the Trp-degrading enzymes Trp 2,3-dioxygenase (TDO) (cortisol) and IDO (cytokines) and levels of Kyn metabolites. We also hypothesize that abnormal pregnancies and failure to combat infections or cancer may be associated with excessive Trp metabolism that can lead to pathological immunosuppression by excessive production of Kyn metabolites. Mounting evidence from many laboratories indicates that Trp metabolites are key regulators of immune cell behaviour, whereas Trp depletion is an indicator of extensive utilization of this key amino acid.
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Sex differences in ischaemic stroke: potential cellular mechanisms. Clin Sci (Lond) 2017; 131:533-552. [PMID: 28302915 DOI: 10.1042/cs20160841] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 12/16/2016] [Accepted: 01/09/2017] [Indexed: 12/12/2022]
Abstract
Stroke remains a leading cause of mortality and disability worldwide. More women than men have strokes each year, in part because women live longer. Women have poorer functional outcomes, are more likely to need nursing home care and have higher rates of recurrent stroke compared with men. Despite continued advancements in primary prevention, innovative acute therapies and ongoing developments in neurorehabilitation, stroke incidence and mortality continue to increase due to the aging of the U.S. POPULATION Sex chromosomes (XX compared with XY), sex hormones (oestrogen and androgen), epigenetic regulation and environmental factors all contribute to sex differences. Ischaemic sensitivity varies over the lifespan, with females having an "ischaemia resistant" phenotype that wanes after menopause, which has recently been modelled in the laboratory. Pharmacological therapies for acute ischaemic stroke are limited. The only pharmacological treatment for stroke approved by the Food and Drug Administration (FDA) is tissue plasminogen activator (tPA), which must be used within hours of stroke onset and has a number of contraindications. Pre-clinical studies have identified a number of potentially efficacious neuroprotective agents; however, nothing has been effectively translated into therapy in clinical practice. This may be due, in part, to the overwhelming use of young male rodents in pre-clinical research, as well as lack of sex-specific design and analysis in clinical trials. The review will summarize the current clinical evidence for sex differences in ischaemic stroke, and will discuss sex differences in the cellular mechanisms of acute ischaemic injury, highlighting cell death and immune/inflammatory pathways that may contribute to these clinical differences.
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Abnormal kynurenine pathway of tryptophan catabolism in cardiovascular diseases. Cell Mol Life Sci 2017; 74:2899-2916. [PMID: 28314892 DOI: 10.1007/s00018-017-2504-2] [Citation(s) in RCA: 138] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 02/26/2017] [Accepted: 03/08/2017] [Indexed: 02/06/2023]
Abstract
Kynurenine pathway (KP) is the primary path of tryptophan (Trp) catabolism in most mammalian cells. The KP generates several bioactive catabolites, such as kynurenine (Kyn), kynurenic acid (KA), 3-hydroxykynurenine (3-HK), xanthurenic acid (XA), and 3-hydroxyanthranilic acid (3-HAA). Increased catabolite concentrations in serum are associated with several cardiovascular diseases (CVD), including heart disease, atherosclerosis, and endothelial dysfunction, as well as their risk factors, including hypertension, diabetes, obesity, and aging. The first catabolic step in KP is primarily controlled by indoleamine 2,3-dioxygenase (IDO) and tryptophan 2,3-dioxygenase (TDO). Following this first step, the KP has two major branches, one branch is mediated by kynurenine 3-monooxygenase (KMO) and kynureninase (KYNU) and is responsible for the formation of 3-HK, 3-HAA, and quinolinic acid (QA); and another branch is controlled by kynurenine amino-transferase (KAT), which generates KA. Uncontrolled Trp catabolism has been demonstrated in distinct CVD, thus, understanding the underlying mechanisms by which regulates KP enzyme expression and activity is paramount. This review highlights the recent advances on the effect of KP enzyme expression and activity in different tissues on the pathological mechanisms of specific CVD, KP is an inflammatory sensor and modulator in the cardiovascular system, and KP catabolites act as the potential biomarkers for CVD initiation and progression. Moreover, the biochemical features of critical KP enzymes and principles of enzyme inhibitor development are briefly summarized, as well as the therapeutic potential of KP enzyme inhibitors against CVD is briefly discussed.
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Badawy AAB. Kynurenine Pathway of Tryptophan Metabolism: Regulatory and Functional Aspects. Int J Tryptophan Res 2017; 10:1178646917691938. [PMID: 28469468 PMCID: PMC5398323 DOI: 10.1177/1178646917691938] [Citation(s) in RCA: 618] [Impact Index Per Article: 88.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 01/11/2017] [Indexed: 12/21/2022] Open
Abstract
Regulatory and functional aspects of the kynurenine (K) pathway (KP) of tryptophan (Trp) degradation are reviewed. The KP accounts for ~95% of dietary Trp degradation, of which 90% is attributed to the hepatic KP. During immune activation, the minor extrahepatic KP plays a more active role. The KP is rate-limited by its first enzyme, Trp 2,3-dioxygenase (TDO), in liver and indoleamine 2,3-dioxygenase (IDO) elsewhere. TDO is regulated by glucocorticoid induction, substrate activation and stabilization by Trp, cofactor activation by heme, and end-product inhibition by reduced nicotinamide adenine dinucleotide (phosphate). IDO is regulated by IFN-γ and other cytokines and by nitric oxide. The KP disposes of excess Trp, controls hepatic heme synthesis and Trp availability for cerebral serotonin synthesis, and produces immunoregulatory and neuroactive metabolites, the B3 “vitamin” nicotinic acid, and oxidized nicotinamide adenine dinucleotide. Various KP enzymes are undermined in disease and are targeted for therapy of conditions ranging from immunological, neurological, and neurodegenerative conditions to cancer.
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Affiliation(s)
- Abdulla A-B Badawy
- Cardiff School of Health Sciences, Cardiff Metropolitan University, Cardiff, UK
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Iwahashi N, Yamamoto M, Nanjo S, Toujima S, Minami S, Ino K. Downregulation of indoleamine 2, 3-dioxygenase expression in the villous stromal endothelial cells of placentas with preeclampsia. J Reprod Immunol 2017; 119:54-60. [DOI: 10.1016/j.jri.2017.01.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Revised: 12/27/2016] [Accepted: 01/18/2017] [Indexed: 10/20/2022]
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Badawy AAB. Tryptophan availability for kynurenine pathway metabolism across the life span: Control mechanisms and focus on aging, exercise, diet and nutritional supplements. Neuropharmacology 2017; 112:248-263. [DOI: 10.1016/j.neuropharm.2015.11.015] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 11/15/2015] [Accepted: 11/18/2015] [Indexed: 10/22/2022]
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40
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Köstlin N, Ostermeir AL, Spring B, Schwarz J, Marmé A, Walter CB, Poets CF, Gille C. HLA-G promotes myeloid-derived suppressor cell accumulation and suppressive activity during human pregnancy through engagement of the receptor ILT4. Eur J Immunol 2016; 47:374-384. [DOI: 10.1002/eji.201646564] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 10/07/2016] [Accepted: 11/08/2016] [Indexed: 02/01/2023]
Affiliation(s)
- Natascha Köstlin
- Tuebingen University Children's Hospital; Department of Neonatology; Tuebingen Germany
| | - Anna-Lena Ostermeir
- Tuebingen University Children's Hospital; Department of Neonatology; Tuebingen Germany
| | - Bärbel Spring
- Tuebingen University Children's Hospital; Department of Neonatology; Tuebingen Germany
| | - Julian Schwarz
- Tuebingen University Children's Hospital; Department of Neonatology; Tuebingen Germany
| | | | | | - Christian F. Poets
- Tuebingen University Children's Hospital; Department of Neonatology; Tuebingen Germany
| | - Christian Gille
- Tuebingen University Children's Hospital; Department of Neonatology; Tuebingen Germany
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41
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Sones JL, Davisson RL. Preeclampsia, of mice and women. Physiol Genomics 2016; 48:565-72. [PMID: 27260843 DOI: 10.1152/physiolgenomics.00125.2015] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 06/03/2016] [Indexed: 11/22/2022] Open
Abstract
Preeclampsia (PE) is a devastating disorder of pregnancy that affects up to 8% of pregnant women in the United States. The diagnosis of PE is made by the presentation of new-onset hypertension, ≥140 mmHg systolic blood pressure (BP) or ≥90 mmHg diastolic BP, and either proteinuria or another accompanying sign/symptom, such as renal insufficiency, thrombocytopenia, hepatic dysfunction, pulmonary edema, or cerebral/visual. These signs can occur suddenly and without warning. PE that presents before 34 wk of gestation is considered early onset and carries a greater risk for perinatal morbidity/mortality than late-onset PE that occurs at or after 34 wk of gestation. At this time there is no cure for PE, and the only effective treatment is delivery of the baby and placenta. If allowed to progress to eclampsia (PE with neurologic involvement), seizures will occur and possibly death through stroke. PE also carries the risk of significant fetal and neonatal morbidity/mortality in addition to long-term health risks for mother and child. Despite significant research efforts to accurately predict, diagnose, and treat PE, a cure eludes us. Elucidating the pathophysiological mechanisms that can cause PE will aid in our ability to accurately prevent, manage, and treat PE to avoid maternal and fetal losses. Intense research efforts are focused on PE, and the mouse has proven to be a useful animal model for investigating molecular mechanisms that may hold the key to unraveling the mysteries of PE in women.
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Affiliation(s)
- Jenny L Sones
- Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana; and
| | - Robin L Davisson
- Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York; and Cell and Developmental Biology, Weill Cornell Medical College, New York, New York
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42
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Harmon AC, Cornelius DC, Amaral LM, Faulkner JL, Cunningham MW, Wallace K, LaMarca B. The role of inflammation in the pathology of preeclampsia. Clin Sci (Lond) 2016; 130:409-19. [PMID: 26846579 PMCID: PMC5484393 DOI: 10.1042/cs20150702] [Citation(s) in RCA: 336] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Preeclampsia (PE) affects 5-7% of all pregnancies in the United States and is the leading cause of maternal and prenatal morbidity. PE is associated with hypertension after week 20 of gestation, decreased renal function and small-for-gestational-age babies. Women with PE exhibit chronic inflammation and production of autoantibodies. It is hypothesized that during PE, placental ischaemia occurs as a result of shallow trophoblast invasion which is associated with an immune imbalance where pro-inflammatory CD4(+) T-cells are increased and T regulatory cells (Tregs) are decreased. This imbalance leads to chronic inflammation characterized by oxidative stress, pro-inflammatory cytokines and autoantibodies. Studies conducted in our laboratory have demonstrated the importance of this immune imbalance in causing hypertension in response to placental ischaemia in pregnant rats. These studies confirm that increased CD4(+) T-cells and decreased Tregs during pregnancy leads to elevated inflammatory cytokines, endothelin (ET-1), reactive oxygen species (ROS) and agonistic autoantibodies to the angiotensin II (Ang II), type 1 receptor (AT1-AA). All of these factors taken together play an important role in increasing the blood pressure during pregnancy. Specifically, this review focuses on the decrease in Tregs, and their associated regulatory cytokine interleukin (IL)-10, which is seen in response to placental ischaemia during pregnancy. This study will also examine the effect of regulatory immune cell repopulation on the pathophysiology of PE. These studies show that restoring the balance of the immune system through increasing Tregs, either by adoptive transfer or by infusing IL-10, reduces the blood pressure and pathophysiology associated with placental ischaemia in pregnant rats.
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Affiliation(s)
- Ashlyn C Harmon
- Departments of Pharmacology, Physiology, & Ob/Gyn, Center for Excellence in Cardiovascular and Renal Research, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A
| | - Denise C Cornelius
- Departments of Pharmacology, Physiology, & Ob/Gyn, Center for Excellence in Cardiovascular and Renal Research, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A
| | - Lorena M Amaral
- Departments of Pharmacology, Physiology, & Ob/Gyn, Center for Excellence in Cardiovascular and Renal Research, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A
| | - Jessica L Faulkner
- Departments of Pharmacology, Physiology, & Ob/Gyn, Center for Excellence in Cardiovascular and Renal Research, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A
| | - Mark W Cunningham
- Departments of Pharmacology, Physiology, & Ob/Gyn, Center for Excellence in Cardiovascular and Renal Research, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A
| | - Kedra Wallace
- Departments of Pharmacology, Physiology, & Ob/Gyn, Center for Excellence in Cardiovascular and Renal Research, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A
| | - Babbette LaMarca
- Departments of Pharmacology, Physiology, & Ob/Gyn, Center for Excellence in Cardiovascular and Renal Research, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A.
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Prell RA, Halpern WG, Rao GK. Perspective on a Modified Developmental and Reproductive Toxicity Testing Strategy for Cancer Immunotherapy. Int J Toxicol 2016; 35:263-73. [DOI: 10.1177/1091581815625596] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The intent of cancer immunotherapy (CIT) is to generate and enhance T-cell responses against tumors. The tumor microenvironment establishes several inhibitory pathways that lead to suppression of the local immune response, which is permissive for tumor growth. The efficacy of different CITs, alone and in combination, stems from reinvigorating the tumor immune response via several mechanisms, including costimulatory agonists, checkpoint inhibitors, and vaccines. However, immune responses to other antigens (self and foreign) may also be enhanced, resulting in potentially undesired effects. In outbred mammalian pregnancies, the fetus expresses paternally derived alloantigens that are recognized as foreign by the maternal immune system. If unchecked or enhanced, maternal immunity to these alloantigens represents a developmental and reproductive risk and thus is a general liability for cancer immunotherapeutic molecules. We propose a tiered approach to confirm this mechanistic reproductive liability for CIT molecules. A rodent allopregnancy model is based on breeding 2 different strains of mice so that paternally derived alloantigens are expressed by the fetus. When tested with a cross-reactive biotherapeutic, small molecule drug, or surrogate molecule, this model should reveal on-target reproductive liabilities if the pathway is involved in maintaining pregnancy. Alternatively, allopregnancy models with genetically modified mice can be interrogated for exquisitely specific biotherapeutics with restricted species reactivity. The allopregnancy model represents a relatively straightforward approach to confirm an expected on-target reproductive risk for CIT molecules. For biotherapeutics, it could potentially replace more complex developmental and reproductive toxicity testing in nonhuman primates when a pregnancy hazard is confirmed or expected.
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Affiliation(s)
- Rodney A. Prell
- Department of Safety Assessment, Genentech Inc, South San Francisco, CA, USA
| | - Wendy G. Halpern
- Department of Safety Assessment, Genentech Inc, South San Francisco, CA, USA
| | - Gautham K. Rao
- Department of Safety Assessment, Genentech Inc, South San Francisco, CA, USA
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Erlandsson L, Nääv Å, Hennessy A, Vaiman D, Gram M, Åkerström B, Hansson SR. Inventory of Novel Animal Models Addressing Etiology of Preeclampsia in the Development of New Therapeutic/Intervention Opportunities. Am J Reprod Immunol 2015; 75:402-10. [PMID: 26685057 DOI: 10.1111/aji.12460] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 11/12/2015] [Indexed: 11/29/2022] Open
Abstract
Preeclampsia is a pregnancy-related disease afflicting 3-7% of pregnancies worldwide and leads to maternal and infant morbidity and mortality. The disease is of placental origin and is commonly described as a disease of two stages. A variety of preeclampsia animal models have been proposed, but all of them have limitations in fully recapitulating the human disease. Based on the research question at hand, different or multiple models might be suitable. Multiple animal models in combination with in vitro or ex vivo studies on human placenta together offer a synergistic platform to further our understanding of the etiology of preeclampsia and potential therapeutic interventions. The described animal models of preeclampsia divide into four categories (i) spontaneous, (ii) surgically induced, (iii) pharmacologically/substance induced, and (iv) transgenic. This review aims at providing an inventory of novel models addressing etiology of the disease and or therapeutic/intervention opportunities.
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Affiliation(s)
- Lena Erlandsson
- Obstetrics and Gynecology, Institution of Clinical Sciences, Lund University, Lund, Sweden
| | - Åsa Nääv
- Obstetrics and Gynecology, Institution of Clinical Sciences, Lund University, Lund, Sweden
| | - Annemarie Hennessy
- School of Medicine, Western Sydney University, Campbelltown, NSW, Australia
| | - Daniel Vaiman
- INSERM U1016, CNRS UMR8104, Faculté de Médecine, Institut Cochin, Paris, France
| | - Magnus Gram
- Infection Medicine, Institution of Clinical Sciences, Lund University, Lund, Sweden
| | - Bo Åkerström
- Infection Medicine, Institution of Clinical Sciences, Lund University, Lund, Sweden
| | - Stefan R Hansson
- Obstetrics and Gynecology, Institution of Clinical Sciences, Lund University, Lund, Sweden
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Harapan H, Yeni CM. The role of microRNAs on angiogenesis and vascular pressure in preeclampsia: The evidence from systematic review. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2015. [DOI: 10.1016/j.ejmhg.2015.03.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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46
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Badawy AAB. Tryptophan metabolism, disposition and utilization in pregnancy. Biosci Rep 2015; 35:e00261. [PMID: 26381576 PMCID: PMC4626867 DOI: 10.1042/bsr20150197] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 08/27/2015] [Accepted: 09/16/2015] [Indexed: 12/26/2022] Open
Abstract
Tryptophan (Trp) requirements in pregnancy are several-fold: (1) the need for increased protein synthesis by mother and for fetal growth and development; (2) serotonin (5-HT) for signalling pathways; (3) kynurenic acid (KA) for neuronal protection; (4) quinolinic acid (QA) for NAD(+) synthesis (5) other kynurenines (Ks) for suppressing fetal rejection. These goals could not be achieved if maternal plasma [Trp] is depleted. Although plasma total (free + albumin-bound) Trp is decreased in pregnancy, free Trp is elevated. The above requirements are best expressed in terms of a Trp utilization concept. Briefly, Trp is utilized as follows: (1) In early and mid-pregnancy, emphasis is on increased maternal Trp availability to meet the demand for protein synthesis and fetal development, most probably mediated by maternal liver Trp 2,3-dioxygenase (TDO) inhibition by progesterone and oestrogens. (2) In mid- and late pregnancy, Trp availability is maintained and enhanced by the release of albumin-bound Trp by albumin depletion and non-esterified fatty acid (NEFA) elevation, leading to increased flux of Trp down the K pathway to elevate immunosuppressive Ks. An excessive release of free Trp could undermine pregnancy by abolishing T-cell suppression by Ks. Detailed assessment of parameters of Trp metabolism and disposition and related measures (free and total Trp, albumin, NEFA, K and its metabolites and pro- and anti-inflammatory cytokines in maternal blood and, where appropriate, placental and fetal material) in normal and abnormal pregnancies may establish missing gaps in our knowledge of the Trp status in pregnancy and help identify appropriate intervention strategies.
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Affiliation(s)
- Abdulla A-B Badawy
- School of Health Sciences, Cardiff Metropolitan University, Western Avenue, Cardiff CF5 2YB, Wales, U.K.
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Lee CL, Guo Y, So KH, Vijayan M, Guo Y, Wong VHH, Yao Y, Lee KF, Chiu PCN, Yeung WSB. Soluble human leukocyte antigen G5 polarizes differentiation of macrophages toward a decidual macrophage-like phenotype. Hum Reprod 2015; 30:2263-74. [PMID: 26307092 DOI: 10.1093/humrep/dev196] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Accepted: 07/24/2015] [Indexed: 12/19/2022] Open
Abstract
STUDY QUESTION What are the actions of soluble human leukocyte antigen G5 (sHLAG5) on macrophage differentiation? SUMMARY ANSWER sHLAG5 polarizes the differentiation of macrophages toward a decidual macrophage-like phenotype, which could regulate fetomaternal tolerance and placental development. WHAT IS KNOWN ALREADY sHLAG5 is a full-length soluble isoform of human leukocyte antigen implicated in immune tolerance during pregnancy. Low or undetectable circulating level of sHLAG5 in first trimester of pregnancy is associated with pregnancy complications such as pre-eclampsia and spontaneous abortion. Decidual macrophages are located in close proximity to invasive trophoblasts, and are involved in regulating fetomaternal tolerance and placental development. STUDY DESIGN, SIZE, DURATION Human peripheral blood monocytes were differentiated into macrophages by treatment with granulocyte macrophage colony-stimulating factor in the presence or absence of recombinant sHLAG5 during the differentiation process. The phenotypes and the biological activities of the resulting macrophages were compared. PARTICIPANTS/MATERIALS, SETTING, METHODS Recombinant sHLAG5 was produced in Escherichia coli BL21 and the protein identity was verified by tandem mass spectrometry. The expression of macrophage markers were analyzed by flow cytometry and quantitative PCR. Phagocytosis was determined by flow cytometry. Indoleamine 2,3-dioxygenase 1 expression and activity were measured by western blot analysis and kynurenine assay, respectively. Cell proliferation and cell cycling were determined by fluorometric cell proliferation assay and flow cytometry, respectively. Cytokine secretion was determined by cytokine array and ELISA kits. Intracellular cytokine expression was measured by flow cytometry. Cell invasion and migration were determined by trans-well invasion and migration assay, respectively. MAIN RESULTS AND THE ROLE OF CHANCE sHLAG5 drove the differentiation of macrophages with 'immuno-modulatory' characteristics, including reduced expression of M1 macrophage marker CD86 and increased expression of M2 macrophage marker CD163. sHLAG5-polarized macrophages showed enhanced phagocytic activity. They also had higher expression and activity of indoleamine 2,3-dioxygenase 1, a phenotypic marker of decidual macrophages, which inhibited proliferation of autologous T-cells via induction of G0/G1 cell cycle arrest. In addition, sHLAG5-polarized macrophages had an increased secretion of interleukin-6 and C-X-C motif ligand 1, which inhibited interferon-γ production in T-cells and induction of trophoblast invasion, respectively. LIMITATIONS, REASONS FOR CAUTION Most information on the phenotypes and biological activities of human decidual macrophages are based on past literatures. A direct comparison between sHLAG5-polarized macrophages and primary decidual macrophages is required to verify the present observations. WIDER IMPLICATIONS OF THE FINDINGS This is the first study on the role of sHLAG5 in macrophage differentiation. Further study on the mechanism that regulates the differentiation process of macrophages would enhance our understanding on the physiology of early pregnancy. STUDY FUNDING/COMPETING INTERESTS This work was supported in part by the Hong Kong Research Grant Council Grant HKU774212 and the University of Hong Kong Grant 201309176126. The authors have no competing interests to declare. TRIAL REGISTRATION NUMBER Nil.
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Affiliation(s)
- Cheuk-Lun Lee
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam Road, Hong Kong, China Centre for Reproduction, Development and Growth, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam Road, Hong Kong, China Shenzhen Key Laboratory of Fertility Regulation, Department of Obstetrics and Gynecology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - YiFan Guo
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam Road, Hong Kong, China Department of Obstetrics and Gynaecology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, China
| | - Kam-Hei So
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Madhavi Vijayan
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Yue Guo
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Vera H H Wong
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - YuanQing Yao
- Department of Obstetrics and Gynaecology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, China
| | - Kai-Fai Lee
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam Road, Hong Kong, China Centre for Reproduction, Development and Growth, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam Road, Hong Kong, China Shenzhen Key Laboratory of Fertility Regulation, Department of Obstetrics and Gynecology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Philip C N Chiu
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam Road, Hong Kong, China Centre for Reproduction, Development and Growth, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam Road, Hong Kong, China Shenzhen Key Laboratory of Fertility Regulation, Department of Obstetrics and Gynecology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - William S B Yeung
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam Road, Hong Kong, China Centre for Reproduction, Development and Growth, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam Road, Hong Kong, China Shenzhen Key Laboratory of Fertility Regulation, Department of Obstetrics and Gynecology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
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Abstract
IDO1 (indoleamine 2,3-dioxygenase 1) is a member of a unique class of mammalian haem dioxygenases that catalyse the oxidative catabolism of the least-abundant essential amino acid, L-Trp (L-tryptophan), along the kynurenine pathway. Significant increases in knowledge have been recently gained with respect to understanding the fundamental biochemistry of IDO1 including its catalytic reaction mechanism, the scope of enzyme reactions it catalyses, the biochemical mechanisms controlling IDO1 expression and enzyme activity, and the discovery of enzyme inhibitors. Major advances in understanding the roles of IDO1 in physiology and disease have also been realised. IDO1 is recognised as a prominent immune regulatory enzyme capable of modulating immune cell activation status and phenotype via several molecular mechanisms including enzyme-dependent deprivation of L-Trp and its conversion into the aryl hydrocarbon receptor ligand kynurenine and other bioactive kynurenine pathway metabolites, or non-enzymatic cell signalling actions involving tyrosine phosphorylation of IDO1. Through these different modes of biochemical signalling, IDO1 regulates certain physiological functions (e.g. pregnancy) and modulates the pathogenesis and severity of diverse conditions including chronic inflammation, infectious disease, allergic and autoimmune disorders, transplantation, neuropathology and cancer. In the present review, we detail the current understanding of IDO1’s catalytic actions and the biochemical mechanisms regulating IDO1 expression and activity. We also discuss the biological functions of IDO1 with a focus on the enzyme's immune-modulatory function, its medical implications in diverse pathological settings and its utility as a therapeutic target.
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Sandgren JA, Scroggins SM, Santillan DA, Devor EJ, Gibson-Corley KN, Pierce GL, Sigmund CD, Santillan MK, Grobe JL. Vasopressin: the missing link for preeclampsia? Am J Physiol Regul Integr Comp Physiol 2015; 309:R1062-4. [PMID: 25810383 DOI: 10.1152/ajpregu.00073.2015] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 03/23/2015] [Indexed: 11/22/2022]
Abstract
Preeclampsia is a devastating cardiovascular disorder of late pregnancy, affecting 5-7% of all pregnancies and claiming the lives of 76,000 mothers and 500,000 children each year. Various lines of evidence support a "tissue rejection" type reaction toward the placenta as the primary initiating event in the development of preeclampsia, followed by a complex interplay among immune, vascular, renal, and angiogenic mechanisms that have been implicated in the pathogenesis of preeclampsia beginning around the end of the first trimester. Critically, it remains unclear what mechanism links the initiating event and these pathogenic mechanisms. We and others have now demonstrated an early and sustained increase in maternal plasma concentrations of copeptin, a protein by-product of arginine vasopressin (AVP) synthesis and release, during preeclampsia. Furthermore, chronic infusion of AVP during pregnancy is sufficient to phenocopy essentially all maternal and fetal symptoms of preeclampsia in mice. As various groups have demonstrated interactions between AVP and immune, renal, and vascular systems in the nonpregnant state, elevations of this hormone are therefore positioned both in time (early pregnancy) and function to contribute to preeclampsia. We therefore posit that AVP represents a missing mechanistic link between initiating events and established midpregnancy dysfunctions that cause preeclampsia.
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Affiliation(s)
| | | | - Donna A Santillan
- Obstetrics & Gynecology, Center for Hypertension Research, University of Iowa, Iowa City, Iowa
| | | | | | - Gary L Pierce
- Health and Human Physiology, and the Center for Hypertension Research, University of Iowa, Iowa City, Iowa; François M. Abboud Cardiovascular Research Center, University of Iowa, Iowa City, Iowa; Fraternal Order of Eagles' Diabetes Research Center, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Curt D Sigmund
- Departments of Pharmacology, Center for Hypertension Research, University of Iowa, Iowa City, Iowa; François M. Abboud Cardiovascular Research Center, University of Iowa, Iowa City, Iowa; Obesity Research & Education Initiative, and Fraternal Order of Eagles' Diabetes Research Center, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Mark K Santillan
- Obstetrics & Gynecology, Center for Hypertension Research, University of Iowa, Iowa City, Iowa; François M. Abboud Cardiovascular Research Center, University of Iowa, Iowa City, Iowa
| | - Justin L Grobe
- Departments of Pharmacology, Center for Hypertension Research, University of Iowa, Iowa City, Iowa; François M. Abboud Cardiovascular Research Center, University of Iowa, Iowa City, Iowa; Obesity Research & Education Initiative, and Fraternal Order of Eagles' Diabetes Research Center, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa
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