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Hammoud B, Nelson JB, May SC, Tersey SA, Mirmira RG. Discordant Effects of Polyamine Depletion by DENSpm and DFMO on β-cell Cytokine Stress and Diabetes Outcomes in Mice. Endocrinology 2024; 165:bqae001. [PMID: 38195178 PMCID: PMC10808000 DOI: 10.1210/endocr/bqae001] [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: 08/30/2023] [Revised: 01/02/2024] [Accepted: 01/08/2024] [Indexed: 01/11/2024]
Abstract
Type 1 diabetes (T1D) is an autoimmune disease leading to dysfunction and loss of insulin-secreting β cells. In β cells, polyamines have been implicated in causing cellular stress and dysfunction. An inhibitor of polyamine biosynthesis, difluoromethylornithine (DFMO), has been shown to delay T1D in mouse models and preserve β-cell function in humans with recent-onset T1D. Another small molecule, N1,N11-diethylnorspermine (DENSpm), both inhibits polyamine biosynthesis and accelerates polyamine metabolism and is being tested for efficacy in cancer clinical trials. In this study, we show that DENSpm depletes intracellular polyamines as effectively as DFMO in mouse β cells. RNA-sequencing analysis, however, suggests that the cellular responses to DENSpm and DFMO differ, with both showing effects on cellular proliferation but the latter showing additional effects on mRNA translation and protein-folding pathways. In the low-dose streptozotocin-induced mouse model of T1D, DENSpm, unlike DFMO, did not prevent or delay diabetes outcomes but did result in improvements in glucose tolerance and reductions in islet oxidative stress. In nonobese diabetic (NOD) mice, short-term DENSpm administration resulted in a slight reduction in insulitis and proinflammatory Th1 cells in the pancreatic lymph nodes. Longer term treatment resulted in a dose-dependent increase in mortality. Notwithstanding the efficacy of both DFMO and DENSpm in reducing potentially toxic polyamine levels in β cells, our results highlight the discordant T1D outcomes that result from differing mechanisms of polyamine depletion and, more importantly, that toxic effects of DENSpm may limit its utility in T1D treatment.
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Affiliation(s)
- Batoul Hammoud
- Department of Pediatrics, The University of Chicago, Chicago, IL 60637, USA
| | - Jennifer B Nelson
- Department of Medicine, The University of Chicago, Chicago, IL 60637, USA
| | - Sarah C May
- Department of Medicine, The University of Chicago, Chicago, IL 60637, USA
| | - Sarah A Tersey
- Department of Medicine, The University of Chicago, Chicago, IL 60637, USA
| | - Raghavendra G Mirmira
- Department of Pediatrics, The University of Chicago, Chicago, IL 60637, USA
- Department of Medicine, The University of Chicago, Chicago, IL 60637, USA
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2
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Brooks WH. Polyamine Dysregulation and Nucleolar Disruption in Alzheimer's Disease. J Alzheimers Dis 2024; 98:837-857. [PMID: 38489184 DOI: 10.3233/jad-231184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2024]
Abstract
A hypothesis of Alzheimer's disease etiology is proposed describing how cellular stress induces excessive polyamine synthesis and recycling which can disrupt nucleoli. Polyamines are essential in nucleolar functions, such as RNA folding and ribonucleoprotein assembly. Changes in the nucleolar pool of anionic RNA and cationic polyamines acting as counterions can cause significant nucleolar dynamics. Polyamine synthesis reduces S-adenosylmethionine which, at low levels, triggers tau phosphorylation. Also, polyamine recycling reduces acetyl-CoA needed for acetylcholine, which is low in Alzheimer's disease. Extraordinary nucleolar expansion and/or contraction can disrupt epigenetic control in peri-nucleolar chromatin, such as chromosome 14 with the presenilin-1 gene; chromosome 21 with the amyloid precursor protein gene; chromosome 17 with the tau gene; chromosome 19 with the APOE4 gene; and the inactive X chromosome (Xi; aka "nucleolar satellite") with normally silent spermine synthase (polyamine synthesis) and spermidine/spermine-N1-acetyltransferase (polyamine recycling) alleles. Chromosomes 17, 19 and the Xi have high concentrations of Alu elements which can be transcribed by RNA polymerase III if positioned nucleosomes are displaced from the Alu elements. A sudden flood of Alu RNA transcripts can competitively bind nucleolin which is usually bound to Alu sequences in structural RNAs that stabilize the nucleolar heterochromatic shell. This Alu competition leads to loss of nucleolar integrity with leaking of nucleolar polyamines that cause aggregation of phosphorylated tau. The hypothesis was developed with key word searches (e.g., PubMed) using relevant terms (e.g., Alzheimer's, lupus, nucleolin) based on a systems biology approach and exploring autoimmune disease tautology, gaining synergistic insights from other diseases.
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3
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Sims EK, Kulkarni A, Hull A, Woerner SE, Cabrera S, Mastrandrea LD, Hammoud B, Sarkar S, Nakayasu ES, Mastracci TL, Perkins SM, Ouyang F, Webb-Robertson BJ, Enriquez JR, Tersey SA, Evans-Molina C, Long SA, Blanchfield L, Gerner EW, Mirmira RG, DiMeglio LA. Inhibition of polyamine biosynthesis preserves β cell function in type 1 diabetes. Cell Rep Med 2023; 4:101261. [PMID: 37918404 PMCID: PMC10694631 DOI: 10.1016/j.xcrm.2023.101261] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 07/18/2023] [Accepted: 10/05/2023] [Indexed: 11/04/2023]
Abstract
In preclinical models, α-difluoromethylornithine (DFMO), an ornithine decarboxylase (ODC) inhibitor, delays the onset of type 1 diabetes (T1D) by reducing β cell stress. However, the mechanism of DFMO action and its human tolerability remain unclear. In this study, we show that mice with β cell ODC deletion are protected against toxin-induced diabetes, suggesting a cell-autonomous role of ODC during β cell stress. In a randomized controlled trial (ClinicalTrials.gov: NCT02384889) involving 41 recent-onset T1D subjects (3:1 drug:placebo) over a 3-month treatment period with a 3-month follow-up, DFMO (125-1,000 mg/m2) is shown to meet its primary outcome of safety and tolerability. DFMO dose-dependently reduces urinary putrescine levels and, at higher doses, preserves C-peptide area under the curve without apparent immunomodulation. Transcriptomics and proteomics of DFMO-treated human islets exposed to cytokine stress reveal alterations in mRNA translation, nascent protein transport, and protein secretion. These findings suggest that DFMO may preserve β cell function in T1D through islet cell-autonomous effects.
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Affiliation(s)
- Emily K Sims
- Division of Pediatric Endocrinology and Diabetology, Herman B. Wells Center for Pediatric Research, Center for Diabetes and Metabolic Diseases, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
| | - Abhishek Kulkarni
- Kovler Diabetes Center and Department of Medicine, The University of Chicago, Chicago, IL 60637, USA
| | - Audrey Hull
- Division of Pediatric Endocrinology and Diabetology, Herman B. Wells Center for Pediatric Research, Center for Diabetes and Metabolic Diseases, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Nationwide Children's Hospital Pediatric Residency Program, Columbus, OH 43205, USA
| | - Stephanie E Woerner
- Division of Pediatric Endocrinology and Diabetology, Herman B. Wells Center for Pediatric Research, Center for Diabetes and Metabolic Diseases, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Susanne Cabrera
- Department of Pediatrics, Section of Endocrinology and Diabetes, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Lucy D Mastrandrea
- Division of Pediatric Endocrinology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14203, USA
| | - Batoul Hammoud
- Department of Pediatrics, The University of Chicago, Chicago, IL 60637, USA
| | - Soumyadeep Sarkar
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Ernesto S Nakayasu
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Teresa L Mastracci
- Department of Biology, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA
| | - Susan M Perkins
- Department of Biostatistics and Health Data Science, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Fangqian Ouyang
- Department of Biostatistics and Health Data Science, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | | | - Jacob R Enriquez
- Kovler Diabetes Center and Department of Medicine, The University of Chicago, Chicago, IL 60637, USA
| | - Sarah A Tersey
- Kovler Diabetes Center and Department of Medicine, The University of Chicago, Chicago, IL 60637, USA
| | - Carmella Evans-Molina
- Division of Pediatric Endocrinology and Diabetology, Herman B. Wells Center for Pediatric Research, Center for Diabetes and Metabolic Diseases, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Department of Medicine and the Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Roudebush VA Medical Center, Indianapolis, IN 46202, USA
| | - S Alice Long
- Benaroya Research Institute, Center for Translational Immunology, Seattle, WA 98101, USA
| | - Lori Blanchfield
- Benaroya Research Institute, Center for Translational Immunology, Seattle, WA 98101, USA
| | | | - Raghavendra G Mirmira
- Kovler Diabetes Center and Department of Medicine, The University of Chicago, Chicago, IL 60637, USA; Department of Pediatrics, The University of Chicago, Chicago, IL 60637, USA.
| | - Linda A DiMeglio
- Division of Pediatric Endocrinology and Diabetology, Herman B. Wells Center for Pediatric Research, Center for Diabetes and Metabolic Diseases, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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Fritsch SD, Sukhbaatar N, Gonzales K, Sahu A, Tran L, Vogel A, Mazic M, Wilson JL, Forisch S, Mayr H, Oberle R, Weiszmann J, Brenner M, Vanhoutte R, Hofmann M, Pirnes-Karhu S, Magnes C, Kühnast T, Weckwerth W, Bock C, Klavins K, Hengstschläger M, Moissl-Eichinger C, Schabbauer G, Egger G, Pirinen E, Verhelst SHL, Weichhart T. Metabolic support by macrophages sustains colonic epithelial homeostasis. Cell Metab 2023; 35:1931-1943.e8. [PMID: 37804836 DOI: 10.1016/j.cmet.2023.09.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 06/23/2023] [Accepted: 09/14/2023] [Indexed: 10/09/2023]
Abstract
The intestinal epithelium has a high turnover rate and constantly renews itself through proliferation of intestinal crypt cells, which depends on insufficiently characterized signals from the microenvironment. Here, we showed that colonic macrophages were located directly adjacent to epithelial crypt cells in mice, where they metabolically supported epithelial cell proliferation in an mTORC1-dependent manner. Specifically, deletion of tuberous sclerosis complex 2 (Tsc2) in macrophages activated mTORC1 signaling that protected against colitis-induced intestinal damage and induced the synthesis of the polyamines spermidine and spermine. Epithelial cells ingested these polyamines and rewired their cellular metabolism to optimize proliferation and defense. Notably, spermine directly stimulated proliferation of colon epithelial cells and colon organoids. Genetic interference with polyamine production in macrophages altered global polyamine levels in the colon and modified epithelial cell proliferation. Our results suggest that macrophages act as "commensals" that provide metabolic support to promote efficient self-renewal of the colon epithelium.
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Affiliation(s)
| | - Nyamdelger Sukhbaatar
- Center for Pathobiochemsitry & Genetics, Medical University of Vienna, Vienna, Austria
| | - Karine Gonzales
- Center for Pathobiochemsitry & Genetics, Medical University of Vienna, Vienna, Austria
| | - Alishan Sahu
- Center for Pathobiochemsitry & Genetics, Medical University of Vienna, Vienna, Austria
| | - Loan Tran
- Department of Pathology, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Institute Applied Diagnostics (LBI AD), Vienna, Austria
| | - Andrea Vogel
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria; Christian Doppler Laboratory Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Mario Mazic
- Center for Pathobiochemsitry & Genetics, Medical University of Vienna, Vienna, Austria
| | - Jayne Louise Wilson
- Center for Pathobiochemsitry & Genetics, Medical University of Vienna, Vienna, Austria
| | - Stephan Forisch
- Center for Pathobiochemsitry & Genetics, Medical University of Vienna, Vienna, Austria
| | - Hannah Mayr
- Center for Pathobiochemsitry & Genetics, Medical University of Vienna, Vienna, Austria
| | - Raimund Oberle
- Center for Pathobiochemsitry & Genetics, Medical University of Vienna, Vienna, Austria
| | - Jakob Weiszmann
- Department of Ecogenomics and Systems Biology, University of Vienna, Vienna, Austria; Vienna Metabolomics Center (VIME), University of Vienna, Vienna, Austria
| | - Martin Brenner
- Department of Ecogenomics and Systems Biology, University of Vienna, Vienna, Austria; Department of Pharmaceutical Sciences/ Pharmacognosy, Faculty of Life Sciences, University of Vienna, Vienna, Austria; Vienna Metabolomics Center (VIME), University of Vienna, Vienna, Austria
| | - Roeland Vanhoutte
- Laboratory of Chemical Biology, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Melanie Hofmann
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria; Christian Doppler Laboratory Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Sini Pirnes-Karhu
- Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Christoph Magnes
- HEALTH-Institute for Biomedicine and Health Sciences, Joanneum Research Forschungsgesellschaft mbH, Graz, Austria
| | - Torben Kühnast
- Diagnostic and Research Department of Microbiology, Hygiene and Environmental Medicine, Medical University of Graz, Graz, Austria
| | - Wolfram Weckwerth
- Department of Ecogenomics and Systems Biology, University of Vienna, Vienna, Austria; Vienna Metabolomics Center (VIME), University of Vienna, Vienna, Austria
| | - Christoph Bock
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria; Institute of Artificial Intelligence, Center for Medical Statistics, Informatics, and Intelligent Systems, Medical University of Vienna, Vienna, Austria
| | - Kristaps Klavins
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Markus Hengstschläger
- Center for Pathobiochemsitry & Genetics, Medical University of Vienna, Vienna, Austria
| | - Christine Moissl-Eichinger
- Diagnostic and Research Department of Microbiology, Hygiene and Environmental Medicine, Medical University of Graz, Graz, Austria
| | - Gernot Schabbauer
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria; Christian Doppler Laboratory Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Gerda Egger
- Department of Pathology, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Institute Applied Diagnostics (LBI AD), Vienna, Austria
| | - Eija Pirinen
- Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland; Research Unit of Biomedicine and Internal Medicine, Faculty of Medicine, University of Oulu, Oulu, Finland; Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Steven H L Verhelst
- Laboratory of Chemical Biology, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Thomas Weichhart
- Center for Pathobiochemsitry & Genetics, Medical University of Vienna, Vienna, Austria.
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5
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Rabelo IB, Chiba AK, Moritz E, D'Amora P, Silva IDCG, Rodrigues CA, Barros MMO, Bordin JO. Metabolomic profile in patients with primary warm autoimmune haemolytic anaemia. Br J Haematol 2022; 201:140-149. [PMID: 36484101 DOI: 10.1111/bjh.18584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 11/16/2022] [Accepted: 11/20/2022] [Indexed: 12/13/2022]
Abstract
Autoimmune haemolytic anaemia (AIHA) is a rare clinical condition with immunoglobulin fixation on the surface of erythrocytes, with or without complement activation. The pathophysiology of AIHA is complex and multifactorial, presenting functional abnormalities of T and B lymphocytes that generate an imbalance between lymphocyte activation, immunotolerance and cytokine production that culminates in autoimmune haemolysis. In AIHA, further laboratory data are needed to predict relapse and refractoriness of therapy, and thus, prevent adverse side-effects and treatment-induced toxicity. The metabolomic profile of AIHA has not yet been described. Our group developed a cross-sectional study with follow-up to assess the metabolomic profile in these patients, as well as to compare the metabolites found depending on the activity and intensity of haemolysis. We analysed the plasma of 26 patients with primary warm AIHA compared to 150 healthy individuals by mass spectrometry. Of the 95 metabolites found in the patients with AIHA, four acylcarnitines, two phosphatidylcholines (PC), asymmetric dimethylarginine (ADMA) and three sphingomyelins were significantly increased. There was an increase in PC, spermine and spermidine in the AIHA group with haemolytic activity. The PC ae 34:3/PC ae 40:2 ratio, seen only in the 12-month relapse group, was a predictor of relapse with 81% specificity and 100% sensitivity. Increased sphingomyelin, ADMA, PC and polyamines in patients with warm AIHA can interfere in autoantigen and autoimmune recognition mechanisms in a number of ways (deficient action of regulatory T lymphocytes on erythrocyte recognition as self, negative regulation of macrophage nuclear factor kappa beta activity, perpetuation of effector T lymphocyte and antibody production against erythrocyte antigens). The presence of PC ae 34:3/PC ae 40:2 ratio as a relapse predictor can help in identifying cases that require more frequent follow-up or early second-line therapies.
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Affiliation(s)
- Iara B. Rabelo
- Clinical and Experimental Oncology Department, Haematology and Hemotherapy Division College of Medicine of the Federal University of São Paulo (EPM‐UNIFESP) São Paulo Brazil
| | - Akemi K. Chiba
- Clinical and Experimental Oncology Department, Haematology and Hemotherapy Division College of Medicine of the Federal University of São Paulo (EPM‐UNIFESP) São Paulo Brazil
| | - Elyse Moritz
- Clinical and Experimental Oncology Department, Haematology and Hemotherapy Division College of Medicine of the Federal University of São Paulo (EPM‐UNIFESP) São Paulo Brazil
| | - Paulo D'Amora
- Gynecology Department College of Medicine of the Federal University of São Paulo (EPM‐UNIFESP) São Paulo Brazil
| | - Ismael Dale C. G. Silva
- Gynecology Department College of Medicine of the Federal University of São Paulo (EPM‐UNIFESP) São Paulo Brazil
| | - Celso A. Rodrigues
- Clinical and Experimental Oncology Department, Haematology and Hemotherapy Division College of Medicine of the Federal University of São Paulo (EPM‐UNIFESP) São Paulo Brazil
| | - Melca M. O. Barros
- Clinical and Experimental Oncology Department, Haematology and Hemotherapy Division College of Medicine of the Federal University of São Paulo (EPM‐UNIFESP) São Paulo Brazil
| | - José O. Bordin
- Clinical and Experimental Oncology Department, Haematology and Hemotherapy Division College of Medicine of the Federal University of São Paulo (EPM‐UNIFESP) São Paulo Brazil
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Polyamine Immunometabolism: Central Regulators of Inflammation, Cancer and Autoimmunity. Cells 2022; 11:cells11050896. [PMID: 35269518 PMCID: PMC8909056 DOI: 10.3390/cells11050896] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/01/2022] [Accepted: 03/03/2022] [Indexed: 02/06/2023] Open
Abstract
Polyamines are ubiquitous, amine-rich molecules with diverse processes in biology. Recent work has highlighted that polyamines exert profound roles on the mammalian immune system, particularly inflammation and cancer. The mechanisms by which they control immunity are still being described. In the context of inflammation and autoimmunity, polyamine levels inversely correlate to autoimmune phenotypes, with lower polyamine levels associated with higher inflammatory responses. Conversely, in the context of cancer, polyamines and polyamine biosynthetic genes positively correlate with the severity of malignancy. Blockade of polyamine metabolism in cancer results in reduced tumor growth, and the effects appear to be mediated by an increase in T-cell infiltration and a pro-inflammatory phenotype of macrophages. These studies suggest that polyamine depletion leads to inflammation and that polyamine enrichment potentiates myeloid cell immune suppression. Indeed, combinatorial treatment with polyamine blockade and immunotherapy has shown efficacy in pre-clinical models of cancer. Considering the efficacy of immunotherapies is linked to autoimmune sequelae in humans, termed immune-adverse related events (iAREs), this suggests that polyamine levels may govern the inflammatory response to immunotherapies. This review proposes that polyamine metabolism acts to balance autoimmune inflammation and anti-tumor immunity and that polyamine levels can be used to monitor immune responses and responsiveness to immunotherapy.
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7
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Plasma Metabolomic Profiling Reveals Four Possibly Disrupted Mechanisms in Systemic Sclerosis. Biomedicines 2022; 10:biomedicines10030607. [PMID: 35327409 PMCID: PMC8945346 DOI: 10.3390/biomedicines10030607] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/24/2022] [Accepted: 02/26/2022] [Indexed: 12/15/2022] Open
Abstract
Systemic sclerosis (SSc) is a rare systemic autoimmune disorder marked by high morbidity and increased risk of mortality. Our study aimed to analyze metabolomic profiles of plasma from SSc patients by using targeted and untargeted metabolomics approaches. Furthermore, we aimed to detect biochemical mechanisms relevant to the pathophysiology of SSc. Experiments were performed using high-performance liquid chromatography coupled to mass spectrometry technology. The investigation of plasma samples from SSc patients (n = 52) compared to a control group (n = 48) allowed us to identify four different dysfunctional metabolic mechanisms, which can be assigned to the kynurenine pathway, the urea cycle, lipid metabolism, and the gut microbiome. These significantly altered metabolic pathways are associated with inflammation, vascular damage, fibrosis, and gut dysbiosis and might be relevant for the pathophysiology of SSc. Further studies are needed to explore the role of these metabolomic networks as possible therapeutic targets of SSc.
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8
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Peña J, Laespada MEF, Pinto CG, Pavón JLP. Development of a method for the determination of polyamines including N-acetylated forms in human saliva via benzoylation and gas chromatography-mass spectrometry. J Chromatogr A 2021; 1651:462278. [PMID: 34102399 DOI: 10.1016/j.chroma.2021.462278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 05/05/2021] [Accepted: 05/15/2021] [Indexed: 11/16/2022]
Abstract
A simple method for the determination of polyamines and their N-acetylated forms was developed using benzoyl chloride as derivatization reagent, and 1,6-diaminohexane as internal standard, followed by liquid-liquid extraction with ethyl acetate. The organic extract was injected in a gas chromatograph using a programmed temperature vaporizer and the determination and quantification was performed with a quadrupole mass spectrometer. There was no matrix effect with the proposed method, so internal calibration was used to quantify the corresponding derivatives. Good linear responses were obtained in the range from the limits of detection to 500 µg L-1 (50 µg L-1 for spermidine), with correlation coefficients varying from 0.9591 to 0.9968. The limits of quantification (S/N = 10) ranged 1.0 - 8.3 µg L-1. Recoveries were found between 82 - 117%, showing the good accuracy of the proposed method. Intra- and inter-day precision assays, expressed as relative standard deviation (RSD) were evaluated at two different concentration levels (low and high), showing values in the range of 2.4 - 6.1% and 5.2 - 9.0% for repeatability and reproducibility, respectively (6.9 - 9.7% and 14.1 - 14.6% for spermidine). Successful determination of the studied polyamines and their N-acetylated forms was performed on the saliva of 17 volunteers.
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Affiliation(s)
- Javier Peña
- Departamento de Química Analítica, Nutrición y Bromatología. Facultad de Ciencias Químicas, Universidad de Salamanca. 37008 Salamanca, Spain.
| | - Mª Esther Fernández Laespada
- Departamento de Química Analítica, Nutrición y Bromatología. Facultad de Ciencias Químicas, Universidad de Salamanca. 37008 Salamanca, Spain
| | - Carmelo García Pinto
- Departamento de Química Analítica, Nutrición y Bromatología. Facultad de Ciencias Químicas, Universidad de Salamanca. 37008 Salamanca, Spain
| | - José Luis Pérez Pavón
- Departamento de Química Analítica, Nutrición y Bromatología. Facultad de Ciencias Químicas, Universidad de Salamanca. 37008 Salamanca, Spain
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9
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Proietti E, Rossini S, Grohmann U, Mondanelli G. Polyamines and Kynurenines at the Intersection of Immune Modulation. Trends Immunol 2020; 41:1037-1050. [PMID: 33055013 DOI: 10.1016/j.it.2020.09.007] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 09/11/2020] [Accepted: 09/14/2020] [Indexed: 12/15/2022]
Abstract
Polyamines (i.e., putrescine, spermidine, and spermine) are bioactive polycations capable of binding nucleic acids and proteins and modulating signaling pathways. Polyamine functions have been studied most extensively in tumors, where they can promote cell transformation and proliferation. Recently, spermidine was found to exert protective effects in an experimental model of multiple sclerosis (MS) and to confer immunoregulatory properties on dendritic cells (DCs), via the indoleamine 2,3-dioxygenase 1 (IDO1) enzyme. IDO1 converts l-tryptophan into metabolites, collectively known as kynurenines, endowed with several immunoregulatory effects via activation of the arylhydrocarbon receptor (AhR). Because AhR activation increases polyamine production, the emerging scenario has identified polyamines and kynurenines as actors of an immunoregulatory circuitry with potential implications for immunotherapy in autoimmune diseases and cancer.
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Affiliation(s)
- Elisa Proietti
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy
| | - Sofia Rossini
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy
| | - Ursula Grohmann
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy.
| | - Giada Mondanelli
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy.
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10
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Kawabata C, Nagasawa T, Ono M, Tarumoto N, Katoh N, Hotta Y, Kawano H, Igarashi K, Shiokawa K, Nishimura K. Plasma acrolein level in rheumatoid arthritis increases independently of the disease characteristics. Mod Rheumatol 2020; 31:357-364. [PMID: 32463710 DOI: 10.1080/14397595.2020.1775921] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVE This study aimed to clarify whether plasma acrolein level actually increases in rheumatoid arthritis (RA) patients, and to elucidate whether any relationship exists between the levels and the RA background variables. METHODS Plasma levels of protein-conjugated acrolein (PC-Acro) in 84 patients (RA group) and 298 normal individuals (Control group) were measured by enzyme-linked immunosorbent assay procedures. The data were statistically analyzed with Wilcoxon rank-sum test, multiple logistic regression analyses and Spearman's rank correlation coefficient. RESULTS The RA group showed significantly higher PC-Acro levels than the Control group (median [interquartile range]: 80.5 [63.2-105.2] and 65.9 [58.9-78.1] nmol/ml, respectively). Of background factors giving influence to PC-Acro level in the combination of the two groups, 'diagnosis of RA positive' indicated strong correlation to high PC-Acro level (odds ratio: 2.96; 95% confidence interval: 1.54-5.71). These increases of PC-Acro in the RA patients did not correlate to their disease duration and/or inflammatory variables: PC-Acro level could elevate even in early RA patients showing negative inflammatory findings. CONCLUSION Plasma levels of PC-Acro increased with RA, but the levels did not correlate with RA background variables. This report provides the basis for further studies of early diagnosis of RA as well as its pathogenesis.
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Affiliation(s)
- Chisato Kawabata
- Department of Orthopaedic Surgery, Teikyo University School of Medicine, Tokyo, Japan.,Department of Judo Therapy, Faculty of Medical Technology, Teikyo University, Utsunomiya, Tochigi, Japan
| | - Toru Nagasawa
- Department of Orthopaedic Surgery, Teikyo University School of Medicine, Tokyo, Japan
| | - Mariko Ono
- Department of Orthopaedic Surgery, Teikyo University School of Medicine, Tokyo, Japan
| | - Nagayoshi Tarumoto
- Department of Judo Physical Therapy, Faculty of Health Care, Teikyo Heisei University, Tokyo, Japan
| | - Narutaka Katoh
- Department of Traumatology, Fukushima Medical University/Trauma & Reconstruction Center, Southern Tohoku General Hospital., Fukushima, Japan.,Division of Orthopaedic Surgery, Aisei Hospital, Tokyo, Japan
| | - Yuko Hotta
- Department of Orthopaedic Surgery, Teikyo University School of Medicine, Tokyo, Japan
| | - Hirotaka Kawano
- Department of Orthopaedic Surgery, Teikyo University School of Medicine, Tokyo, Japan
| | - Kazuei Igarashi
- Amine Pharma Research Institute, Innovation Plaza at Chiba University, Chiba, Japan.,Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Koichiro Shiokawa
- Department of Judo Therapy, Faculty of Medical Technology, Teikyo University, Utsunomiya, Tochigi, Japan
| | - Keita Nishimura
- Department of Orthopaedic Surgery, Teikyo University School of Medicine, Tokyo, Japan.,Department of Judo Therapy, Faculty of Medical Technology, Teikyo University, Utsunomiya, Tochigi, Japan
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11
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Brooks W. An Epigenetics-Based Hypothesis of Autoantigen Development in Systemic Lupus Erythematosus. EPIGENOMES 2020; 4:epigenomes4020006. [PMID: 34968240 PMCID: PMC8594704 DOI: 10.3390/epigenomes4020006] [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: 02/19/2020] [Accepted: 04/20/2020] [Indexed: 11/16/2022] Open
Abstract
Currently, we have a limited understanding of mechanisms leading to systemic lupus erythematosus, but we know that genetics, environmental factors, and epigenetics contribute to the disease. One common aspect of the various environmental triggers is that they can cause cellular stress. When extraordinary stress occurs, such as viral activation, a cell's response can include increased nucleolar volume and activity to produce more machinery (e.g., ribosomes) to help the cell recover. However, nucleolar expansion can disrupt the epigenetic control in neighboring heterochromatin that comprises the nucleolar shell. This disruption can open underlying vulnerabilities that provoke an autoimmune reaction. Here, we review the "X chromosome-nucleolus nexus" hypothesis, which explains how nucleolar stress can disrupt epigenetically silenced chromatin, especially the neighboring inactive X chromosome (aka the nucleolar satellite). Chromatin disruption can lead to the expression of sequestered DNA, such as Alu elements and fully functional LINE-1 reverse transcriptase genes. In addition, Alu transcripts can disrupt the nucleolar structural integrity, leading to nucleolar disintegration. Such disintegration can leave nucleolar components and products in autoantigenic forms, such as abnormal conformations or incomplete macromolecular assemblies. Recent research on DNA sensing pathways can now be incorporated into the hypothesis to provide further details explaining how autoantibodies to endogenous nucleic acids arise.
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Affiliation(s)
- Wesley Brooks
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA
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12
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Krzystek-Korpacka M, G. Fleszar M, Bednarz-Misa I, Lewandowski Ł, Szczuka I, Kempiński R, Neubauer K. Transcriptional and Metabolomic Analysis of L-Arginine/Nitric Oxide Pathway in Inflammatory Bowel Disease and Its Association with Local Inflammatory and Angiogenic Response: Preliminary Findings. Int J Mol Sci 2020; 21:ijms21051641. [PMID: 32121248 PMCID: PMC7084352 DOI: 10.3390/ijms21051641] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 02/25/2020] [Accepted: 02/26/2020] [Indexed: 12/11/2022] Open
Abstract
L-arginine/nitric oxide pathway in Crohn's disease (CD) and ulcerative colitis (UC) is poorly investigated. The aim of current study is to quantify pathway serum metabolites in 52 CD (40 active), 48 UC (33 active), and 18 irritable bowel syndrome patients and 40 controls using mass spectrometry and at determining mRNA expression of pathway-associated enzymes in 91 bowel samples. Arginine and symmetric dimethylarginine decreased (p < 0.05) in active-CD (129 and 0.437 µM) compared to controls (157 and 0.494 µM) and active-UC (164 and 0.52 µM). Citrulline and dimethylamine increased (p < 0.05) in active-CD (68.7 and 70.9 µM) and active-UC (65.9 and 73.9 µM) compared to controls (42.7 and 50.4 µM). Compared to normal, CD-inflamed small bowel had downregulated (p < 0.05) arginase-2 by 2.4-fold and upregulated dimethylarginine dimethylaminohydrolase (DDAH)-2 (1.5-fold) and arginine N-methyltransferase (PRMT)-2 (1.6-fold). Quiescent-CD small bowel had upregulated (p < 0.05) arginase-2 (1.8-fold), DDAH1 (2.9-fold), DDAH2 (1.5-fold), PRMT1 (1.5-fold), PRMT2 (1.7-fold), and PRMT5 (1.4-fold). Pathway enzymes were upregulated in CD-inflamed/quiescent and UC-inflamed colon as compared to normal. Compared to inflamed, quiescent CD-colon had upregulated DDAH1 (5.7-fold) and ornithine decarboxylase (1.6-fold). Concluding, the pathway is deregulated in CD and UC, also in quiescent bowel, reflecting inflammation severity and angiogenic potential. Functional analysis of PRMTs and DDAHs as potential targets for therapy is warranted.
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Affiliation(s)
- Małgorzata Krzystek-Korpacka
- Department of Medical Biochemistry, Wroclaw Medical University, 50-368 Wrocław, Poland; (M.G.F.); (I.B.-M.); (Ł.L.); (I.S.)
- Correspondence: ; Tel.: +48-71-784-1375
| | - Mariusz G. Fleszar
- Department of Medical Biochemistry, Wroclaw Medical University, 50-368 Wrocław, Poland; (M.G.F.); (I.B.-M.); (Ł.L.); (I.S.)
| | - Iwona Bednarz-Misa
- Department of Medical Biochemistry, Wroclaw Medical University, 50-368 Wrocław, Poland; (M.G.F.); (I.B.-M.); (Ł.L.); (I.S.)
| | - Łukasz Lewandowski
- Department of Medical Biochemistry, Wroclaw Medical University, 50-368 Wrocław, Poland; (M.G.F.); (I.B.-M.); (Ł.L.); (I.S.)
| | - Izabela Szczuka
- Department of Medical Biochemistry, Wroclaw Medical University, 50-368 Wrocław, Poland; (M.G.F.); (I.B.-M.); (Ł.L.); (I.S.)
| | - Radosław Kempiński
- Department of Gastroenterology and Hepatology, Wroclaw Medical University, 50-556 Wrocław, Poland; (R.K.); (K.N.)
| | - Katarzyna Neubauer
- Department of Gastroenterology and Hepatology, Wroclaw Medical University, 50-556 Wrocław, Poland; (R.K.); (K.N.)
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13
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Karami J, Aslani S, Tahmasebi MN, Mousavi MJ, Sharafat Vaziri A, Jamshidi A, Farhadi E, Mahmoudi M. Epigenetics in rheumatoid arthritis; fibroblast-like synoviocytes as an emerging paradigm in the pathogenesis of the disease. Immunol Cell Biol 2020; 98:171-186. [PMID: 31856314 DOI: 10.1111/imcb.12311] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 12/14/2019] [Accepted: 12/16/2019] [Indexed: 12/11/2022]
Abstract
Rheumatoid arthritis (RA) is characterized by immune dysfunctions and chronic inflammation that mainly affects diarthrodial joints. Genetics has long been surveyed in searching for the etiopathogenesis of the disease and partially clarified the conundrums within this context. Epigenetic alterations, such as DNA methylation, histone modifications, and noncoding RNAs, which have been considered to be involved in RA pathogenesis, likely explain the nongenetic risk factors. Epigenetic modifications may influence RA through fibroblast-like synoviocytes (FLSs). It has been shown that FLSs play an essential role in the onset and exacerbation of RA, and therefore, they may illustrate some aspects of RA pathogenesis. These cells exhibit a unique DNA methylation profile in the early stage of the disease that changes with disease progression. Histone acetylation profile in RA FLSs is disrupted through the imbalance of histone acetyltransferases and histone deacetylase activity. Furthermore, dysregulation of microRNAs (miRNAs) is immense. Most of these miRNAs have shown an aberrant expression in FLSs that are involved in proliferation and cytokine production. Besides, dysregulation of long noncoding RNAs in FLSs has been revealed and attributed to RA pathogenesis. Further investigations are needed to get a better view of epigenetic alterations and their interactions. We also discuss the role of these epigenetic alterations in RA pathogenesis and their therapeutic potential.
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Affiliation(s)
- Jafar Karami
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran.,Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Department of Laboratory Sciences, Khomein University of Medical Sciences, Khomein, Iran
| | - Saeed Aslani
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Naghi Tahmasebi
- Department of Orthopedics, Division of Knee Surgery, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Javad Mousavi
- Department of Hematology, Faculty of Allied Medicine, Bushehr University of Medical Sciences, Bushehr, Iran.,Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Arash Sharafat Vaziri
- Department of Orthopedics, Division of Knee Surgery, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmadreza Jamshidi
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Elham Farhadi
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran.,Inflammation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahdi Mahmoudi
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran.,Inflammation Research Center, Tehran University of Medical Sciences, Tehran, Iran
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14
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Lee YR, Kim H, Lew BL, Sim WY, Lee J, Oh HB, Hong J, Chung BC. Sex-related differences in urinary immune-related metabolic profiling of alopecia areata patients. Metabolomics 2020; 16:15. [PMID: 31950279 DOI: 10.1007/s11306-020-1634-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 01/03/2020] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Alopecia areata is a well-known autoimmune disease affecting humans. Polyamines are closely associated with proliferation and inflammation, and steroid hormones are involved in immune responses. Additionally, bile acids play roles in immune homeostasis by activating various signaling pathways; however, the roles of these substances and their metabolites in alopecia areata remain unclear. OBJECTIVES In this study, we aimed to identify differences in metabolite levels in urine samples from patients with alopecia areata and healthy controls. METHODS To assess polyamine, androgen, and bile acid concentrations, we performed high-performance liquid chromatography-tandem mass spectrometry. RESULTS Our results showed that spermine and dehydroepiandrosterone levels differed significantly between male patients and controls, whereas ursodeoxycholic acid levels were significantly higher in female patients with alopecia areata than in controls. CONCLUSION Our findings suggested different urinary polyamine, androgen, and bile acid concentrations between alopecia areata patients and normal controls. Additionally, levels of endogenous substances varied according to sex, and this should be considered when developing appropriate treatments and diagnostic techniques. Our findings improve our understanding of polyamine, androgen, and bile acid profiles in patients with alopecia areata and highlight the need to consider sex-related differences.
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Affiliation(s)
- Yu Ra Lee
- Molecular Recognition Research Center, Korea Institute of Science and Technology, Seoul, 02792, Korea
- KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul, 02447, Korea
| | - Haksoon Kim
- Molecular Recognition Research Center, Korea Institute of Science and Technology, Seoul, 02792, Korea
- Department of Chemistry, Sogang University, Seoul, 04107, Korea
| | - Bark Lynn Lew
- Department of Dermatology, Kyung Hee University Hospital at Gangdong, Kyung Hee University, Seoul, 05278, Korea
| | - Woo Young Sim
- Department of Dermatology, Kyung Hee University Hospital at Gangdong, Kyung Hee University, Seoul, 05278, Korea
| | - Jeongae Lee
- Molecular Recognition Research Center, Korea Institute of Science and Technology, Seoul, 02792, Korea
| | - Han Bin Oh
- Department of Chemistry, Sogang University, Seoul, 04107, Korea
| | - Jongki Hong
- KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul, 02447, Korea.
- College of Pharmacy, Kyung Hee University, Seoul, 02447, Korea.
| | - Bong Chul Chung
- Molecular Recognition Research Center, Korea Institute of Science and Technology, Seoul, 02792, Korea.
- KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul, 02447, Korea.
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15
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Lee YR, Lew BL, Sim WY, Lee J, Hong J, Chung BC. Altered polyamine profiling in the hair of patients with androgenic alopecia and alopecia areata. J Dermatol 2019; 46:985-992. [PMID: 31464015 DOI: 10.1111/1346-8138.15063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 07/30/2019] [Indexed: 11/30/2022]
Abstract
Hair follicles are among the most highly proliferative tissues. Polyamines are associated with proliferation, and several polyamines including spermidine and spermine play anti-inflammatory roles. Androgenic alopecia results from increased dihydrotestosterone metabolism, and alopecia areata is an autoimmune disease. This study aimed to investigate differences in polyamine profiles in hair samples between patients with androgenic alopecia and alopecia areata. Polyamine concentrations were determined through high-performance liquid chromatography-mass spectrometry. Hair samples were derivatized with isobutyl chloroformate. Differences in polyamine levels were observed between androgenic alopecia and alopecia areata compared with normal controls. In particular, polyamine levels were higher in alopecia areata patients than in normal controls. Certain polyamines displayed different concentrations between the androgenic alopecia and alopecia areata groups, suggesting that some polyamines, particularly N-acetyl putrescine (P = 0.007) and N-acetyl cadaverine (P = 0.0021), are significantly different in androgenic alopecia. Furthermore, spermidine (P = 0.021) was significantly different in alopecia areata. Our findings suggest that non-invasive quantification of hair polyamines may help distinguish between androgenic alopecia and alopecia areata. Our study provides novel insights into physiological alterations in patients with androgenic alopecia and those with alopecia areata and reveals some differences in polyamine levels in hair loss diseases with two different modes of action.
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Affiliation(s)
- Yu Ra Lee
- Molecular Recognition Research Center, Korea Institute of Science and Technology, Seoul, Korea.,KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul, Korea
| | - Bark Lynn Lew
- Department of Dermatology, Kyung Hee University Hospital at Gangdong, Kyung Hee University, Seoul, Korea
| | - Woo Young Sim
- Department of Dermatology, Kyung Hee University Hospital at Gangdong, Kyung Hee University, Seoul, Korea
| | - Jeongae Lee
- Molecular Recognition Research Center, Korea Institute of Science and Technology, Seoul, Korea
| | - Jongki Hong
- KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul, Korea.,College of Pharmacy, Kyung Hee University, Seoul, Korea
| | - Bong Chul Chung
- Molecular Recognition Research Center, Korea Institute of Science and Technology, Seoul, Korea.,KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul, Korea
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16
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Nemtsova MV, Zaletaev DV, Bure IV, Mikhaylenko DS, Kuznetsova EB, Alekseeva EA, Beloukhova MI, Deviatkin AA, Lukashev AN, Zamyatnin AA. Epigenetic Changes in the Pathogenesis of Rheumatoid Arthritis. Front Genet 2019; 10:570. [PMID: 31258550 PMCID: PMC6587113 DOI: 10.3389/fgene.2019.00570] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 05/31/2019] [Indexed: 01/06/2023] Open
Abstract
Rheumatoid arthritis (RA) is a systemic autoimmune disease that affects about 1% of the world’s population. The etiology of RA remains unknown. It is considered to occur in the presence of genetic and environmental factors. An increasing body of evidence pinpoints that epigenetic modifications play an important role in the regulation of RA pathogenesis. Epigenetics causes heritable phenotype changes that are not determined by changes in the DNA sequence. The major epigenetic mechanisms include DNA methylation, histone proteins modifications and changes in gene expression caused by microRNAs and other non-coding RNAs. These modifications are reversible and could be modulated by diet, drugs, and other environmental factors. Specific changes in DNA methylation, histone modifications and abnormal expression of non-coding RNAs associated with RA have already been identified. This review focuses on the role of these multiple epigenetic factors in the pathogenesis and progression of the disease, not only in synovial fibroblasts, immune cells, but also in the peripheral blood of patients with RA, which clearly shows their high diagnostic potential and promising targets for therapy in the future.
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Affiliation(s)
- Marina V Nemtsova
- Institute of Molecular Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.,Laboratory of Epigenetics, Research Centre for Medical Genetics, Moscow, Russia
| | - Dmitry V Zaletaev
- Institute of Molecular Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.,Laboratory of Epigenetics, Research Centre for Medical Genetics, Moscow, Russia
| | - Irina V Bure
- Institute of Molecular Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Dmitry S Mikhaylenko
- Institute of Molecular Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.,Laboratory of Epigenetics, Research Centre for Medical Genetics, Moscow, Russia
| | - Ekaterina B Kuznetsova
- Institute of Molecular Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.,Laboratory of Epigenetics, Research Centre for Medical Genetics, Moscow, Russia
| | - Ekaterina A Alekseeva
- Institute of Molecular Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.,Laboratory of Epigenetics, Research Centre for Medical Genetics, Moscow, Russia
| | - Marina I Beloukhova
- Institute of Molecular Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Andrei A Deviatkin
- Institute of Molecular Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Alexander N Lukashev
- Institute of Molecular Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.,Martsinovsky Institute of Medical Parasitology, Tropical and Vector Borne Diseases, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Andrey A Zamyatnin
- Institute of Molecular Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.,A.N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
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17
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Review of the "X chromosome-nucleolus nexus" hypothesis of autoimmune diseases with an update explaining disruption of the nucleolus. Immunol Res 2018; 66:790-799. [PMID: 30515730 DOI: 10.1007/s12026-018-9044-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The "X chromosome-nucleolus nexus" hypothesis provides a comprehensive explanation of how autoantibodies can develop following cellular stress. The hypothesis connects autoimmune diseases with the impact of environmental factors, such as viruses, through epigenetic disruption. The inactive X chromosome, a major epigenetic structure in the female cell's nucleus, is a key component of the hypothesis. The inactive X is vulnerable to disruption due to the following: (1) its heavy requirements for methylation to suppress gene expression, (2) its peripheral location at the nuclear envelope, (3) its late replication timing, and (4) its frequently observed close association with the nucleolus. The dynamic nucleolus can expand dramatically in response to cellular stress and this could disrupt the neighboring inactive X, particularly during replication, leading to expression from previously suppressed chromatin. Especially vulnerable at the surface of the inactive X chromosome would be genes and elements from Xp22 to the terminus of the short arm of the X. Expression of these genes and elements could interfere with nucleolar integrity, nucleolar efficiency, and future nucleolar stress response, and even lead to fragmentation of the nucleolus. Ribonucleoprotein complexes assembled in the nucleolus could be left in incomplete states and inappropriate conformations, and/or contain viral components when the nucleolus is disrupted and these abnormal complexes could initiate an autoimmune response when exposed to the immune system. Epitope spreading could then lead to an autoimmune reaction to the more abundant normal complexes. Many autoantigens reported in lupus and other autoimmune diseases are, at least transiently, nucleolar components.
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18
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Brooks WH. A Review of Autoimmune Disease Hypotheses with Introduction of the "Nucleolus" Hypothesis. Clin Rev Allergy Immunol 2018; 52:333-350. [PMID: 27324247 DOI: 10.1007/s12016-016-8567-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Numerous hypotheses have been proposed in order to explain the complexity of autoimmune diseases. These hypotheses provide frameworks towards understanding the relations between triggers, autoantigen development, symptoms, and demographics. However, testing and refining these hypotheses are difficult tasks since autoimmune diseases have a potentially overwhelming number of variables due to the influence on autoimmune diseases from environmental factors, genetics, and epigenetics. Typically, the hypotheses are narrow in scope, for example, explaining the diseases in terms of genetics without defining detailed roles for environmental factors or epigenetics. Here, we present a brief review of the major hypotheses of autoimmune diseases including a new one related to the consequences of abnormal nucleolar interactions with chromatin, the "nucleolus" hypothesis which was originally termed the "inactive X chromosome and nucleolus nexus" hypothesis. Indeed, the dynamic nucleolus can expand as part of a cellular stress response and potentially engulf portions of chromatin, leading to disruption of the chromatin. The inactive X chromosome (a.k.a. the Barr body) is particularly vulnerable due to its close proximity to the nucleolus. In addition, the polyamines, present at high levels in the nucleolus, are also suspected of contributing to the development of autoantigens.
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Affiliation(s)
- Wesley H Brooks
- Department of Chemistry, University of South Florida, 4202 E Fowler Ave, CHE205, Tampa, FL, 33620, USA.
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19
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Brooks WH. Involvement of X Chromosome Short Arm in Autoimmune Diseases: Comment on the Article by Sharma et al. Arthritis Rheumatol 2018; 70:625-626. [PMID: 29316369 DOI: 10.1002/art.40411] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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Brooks WH. Viral Impact in Autoimmune Diseases: Expanding the "X Chromosome-Nucleolus Nexus" Hypothesis. Front Immunol 2017; 8:1657. [PMID: 29234321 PMCID: PMC5712313 DOI: 10.3389/fimmu.2017.01657] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 11/13/2017] [Indexed: 12/19/2022] Open
Abstract
Viruses are suspected of significant roles in autoimmune diseases but the mechanisms are unclear. We get some insight by considering demands a virus places on host cells. Viruses not only require production of their own proteins, RNA and/or DNA, but also production of additional cellular machinery, such as ribosomes, to handle the increased demands. Since the nucleolus is a major site of RNA processing and ribonucleoprotein assembly, nucleoli are targeted by viruses, directly when viral RNA and proteins enter the nucleolus and indirectly when viruses induce increased expression of cellular polyamine genes. Polyamines are at high levels in nucleoli to assist in RNA folding. The size and activity of nucleoli increase directly with increases in polyamines. Nucleolar expansion due to abnormal increases in polyamines could disrupt nearby chromatin, such as the inactive X chromosome, leading to expression of previously sequestered DNA. Sudden expression of a large concentration of Alu elements from the disrupted inactive X can compete with RNA transcripts containing intronic Alu sequences that normally maintain nucleolar structural integrity. Such disruption of nucleolar activity can lead to misfolded RNAs, misassembled ribonucleoprotein complexes, and fragmentation of the nucleolus. Many autoantigens in lupus are, at least transiently, components of the nucleolus. Considering these effects of viruses, the “X chromosome–nucleolus nexus” hypothesis, which proposed disruption of the inactive X by the nucleolus during stress, is now expanded here to propose subsequent disruption of the nucleolus by previously sequestered Alu elements, which can fragment the nucleolus, leading to generation of autoantigens.
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Affiliation(s)
- Wesley H Brooks
- Department of Chemistry, University of South Florida, Tampa, FL, United States
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21
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Li H, Lu H, Tang W, Zuo J. Targeting methionine cycle as a potential therapeutic strategy for immune disorders. Expert Opin Ther Targets 2017; 21:1-17. [PMID: 28829212 DOI: 10.1080/14728222.2017.1370454] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Methionine cycle plays an essential role in regulating many cellular events, especially transmethylation reactions, incorporating the methyl donor S-adenosylmethionine (SAM). The transmethylations and substances involved in the cycle have shown complicated effects and mechanisms on immunocytes developments and activations, and exert crucial impacts on the pathological processes in immune disorders. Areas covered: Methionine cycle has been considered as an effective means of drug developments. This review discussed the role of methionine cycle in immune responses and summarized the potential therapeutic strategies based on the cycle, including SAM analogs, methyltransferase inhibitors, S-adenosylhomocysteine hydrolase (SAHH) inhibitors, adenosine receptors specific agonists or antagonists and homocysteine (Hcy)-lowering reagents, in treating human immunodeficiency virus (HIV) infections, systemic lupus erythematosus (SLE), rheumatoid arthritis (RA), multiple sclerosis (MS), systemic sclerosis (SSc) and other immune disorders. Expert opinion: New targets and biomarkers grown out of methionine cycle have developed rapidly in the past decades. However, impacts of epigenetic regulations on immune disorders are unclear and whether the substances in methionine cycle can be clarified as biomarkers remains controversial. Therefore, further elucidation on the role of epigenetic regulations and substances in methionine cycle may contribute to exploring the cycle-derived biomarkers and drugs in immune disorders.
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Affiliation(s)
- Heng Li
- a Laboratory of Immunopharmacology, State Key Laboratory of Drug Research , Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai , China
- b College of Pharmacy , University of Chinese Academy of Sciences , Beijing , China
| | - Huimin Lu
- a Laboratory of Immunopharmacology, State Key Laboratory of Drug Research , Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai , China
- b College of Pharmacy , University of Chinese Academy of Sciences , Beijing , China
| | - Wei Tang
- a Laboratory of Immunopharmacology, State Key Laboratory of Drug Research , Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai , China
- b College of Pharmacy , University of Chinese Academy of Sciences , Beijing , China
| | - Jianping Zuo
- a Laboratory of Immunopharmacology, State Key Laboratory of Drug Research , Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai , China
- b College of Pharmacy , University of Chinese Academy of Sciences , Beijing , China
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22
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Ospelt C, Gay S, Klein K. Epigenetics in the pathogenesis of RA. Semin Immunopathol 2017; 39:409-419. [DOI: 10.1007/s00281-017-0621-5] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 03/09/2017] [Indexed: 01/02/2023]
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23
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Brooks WH, Renaudineau Y. Epigenetics and autoimmune diseases: the X chromosome-nucleolus nexus. Front Genet 2015; 6:22. [PMID: 25763008 PMCID: PMC4329817 DOI: 10.3389/fgene.2015.00022] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Accepted: 01/16/2015] [Indexed: 12/18/2022] Open
Abstract
Autoimmune diseases occur more often in females, suggesting a key role for the X chromosome. X chromosome inactivation, a major epigenetic feature in female cells that provides dosage compensation of X-linked genes to avoid overexpression, presents special vulnerabilities that can contribute to the disease process. Disruption of X inactivation can result in loss of dosage compensation with expression from previously sequestered genes, imbalance of gene products, and altered endogenous material out of normal epigenetic context. In addition, the human X has significant differences compared to other species and these differences can contribute to the frequency and intensity of the autoimmune disease in humans as well as the types of autoantigens encountered. Here a link is demonstrated between autoimmune diseases, such as systemic lupus erythematosus, and the X chromosome by discussing cases in which typically non-autoimmune disorders complicated with X chromosome abnormalities also present lupus-like symptoms. The discussion is then extended to the reported spatial and temporal associations of the inactive X chromosome with the nucleolus. When frequent episodes of cellular stress occur, the inactive X chromosome may be disrupted and inadvertently become involved in the nucleolar stress response. Development of autoantigens, many of which are at least transiently components of the nucleolus, is then described. Polyamines, which aid in nucleoprotein complex assembly in the nucleolus, increase further during cell stress, and appear to have an important role in the autoimmune disease process. Autoantigenic endogenous material can potentially be stabilized by polyamines. This presents a new paradigm for autoimmune diseases: that many are antigen-driven and the autoantigens originate from altered endogenous material due to episodes of cellular stress that disrupt epigenetic control. This suggests that epigenetics and the X chromosome are important aspects of autoimmune diseases.
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Affiliation(s)
- Wesley H Brooks
- Department of Chemistry, University of South Florida Tampa, FL, USA
| | - Yves Renaudineau
- Research Unit INSERM ERI29/EA2216, SFR ScinBios, Labex Igo "Immunotherapy Graft, Oncology", Réseau Épigénétique et Réseau Canaux Ioniques du Cancéropole Grand Ouest, European University of Brittany Brest, France ; Laboratory of Immunology and Immunotherapy, Hôpital Morvan Brest, France
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Grossi M, Rippe C, Sathanoori R, Swärd K, Forte A, Erlinge D, Persson L, Hellstrand P, Nilsson BO. Vascular smooth muscle cell proliferation depends on caveolin-1-regulated polyamine uptake. Biosci Rep 2014; 34:e00153. [PMID: 25301005 PMCID: PMC4240025 DOI: 10.1042/bsr20140140] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 10/09/2014] [Indexed: 12/11/2022] Open
Abstract
Much evidence highlights the importance of polyamines for VSMC (vascular smooth muscle cell) proliferation and migration. Cav-1 (caveolin-1) was recently reported to regulate polyamine uptake in intestinal epithelial cells. The aim of the present study was to assess the importance of Cav-1 for VSMC polyamine uptake and its impact on cell proliferation and migration. Cav-1 KO (knockout) mouse aortic cells showed increased polyamine uptake and elevated proliferation and migration compared with WT (wild-type) cells. Both Cav-1 KO and WT cells expressed the smooth muscle differentiation markers SM22 and calponin. Cell-cycle phase distribution analysis revealed a higher proportion of Cav-1 KO than WT cells in the S phase. Cav-1 KO cells were hyper-proliferative in the presence but not in the absence of extracellular polyamines, and, moreover, supplementation with exogenous polyamines promoted proliferation in Cav-1 KO but not in WT cells. Expression of the solute carrier transporters Slc7a1 and Slc43a1 was higher in Cav-1 KO than in WT cells. ODC (ornithine decarboxylase) protein and mRNA expression as well as ODC activity were similar in Cav-1 KO and WT cells showing unaltered synthesis of polyamines in Cav-1 KO cells. Cav-1 was reduced in migrating cells in vitro and in carotid lesions in vivo. Our data show that Cav-1 negatively regulates VSMC polyamine uptake and that the proliferative advantage of Cav-1 KO cells is critically dependent on polyamine uptake. We provide proof-of-principle for targeting Cav-1-regulated polyamine uptake as a strategy to fight unwanted VSMC proliferation as observed in restenosis.
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Key Words
- caveolin-1
- cell cycle
- ornithine decarboxylase
- polyamine transporter
- polyamine
- vascular smooth muscle cell
- asmc, aortic smooth muscle cell
- cav-1, caveolin-1
- cea, carotid endarterectomy
- dfmo, difluoromethylornithine
- dmem, dulbecco’s modified eagle’s medium
- hbss, hanks balanced salt solution
- [3h]put, [3h]putrescine
- hrp, horseradish peroxidise
- [3h]spd, [3h]spermidine
- hsp90, heat-shock protein 90
- ko, knockout
- odc, ornithine decarboxylase
- pi, propidium iodide
- qrt-pcr, quantitative real-time pcr
- vsmc, vascular smooth muscle cell
- wt, wild-type
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MESH Headings
- Amino Acid Transport Systems, Basic/genetics
- Amino Acid Transport Systems, Basic/metabolism
- Animals
- Blotting, Western
- Calcium-Binding Proteins/metabolism
- Carotid Arteries/metabolism
- Carotid Arteries/surgery
- Caveolin 1/genetics
- Caveolin 1/metabolism
- Cell Movement
- Cell Proliferation
- Cells, Cultured
- DNA/biosynthesis
- Gene Expression
- Immunohistochemistry
- Mice, Inbred C57BL
- Mice, Knockout
- Microfilament Proteins/metabolism
- Muscle Proteins/metabolism
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/metabolism
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Ornithine Decarboxylase/genetics
- Ornithine Decarboxylase/metabolism
- Polyamines/metabolism
- Polyamines/pharmacokinetics
- Polyamines/pharmacology
- Rats, Wistar
- Reverse Transcriptase Polymerase Chain Reaction
- Calponins
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Affiliation(s)
- Mario Grossi
- *Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Catarina Rippe
- *Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Ramasri Sathanoori
- †Department of Cardiology, Clinical Sciences, Lund University, Lund, Sweden
| | - Karl Swärd
- *Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Amalia Forte
- ‡Department of Experimental Medicine, Second University of Naples, Naples, Italy
| | - David Erlinge
- †Department of Cardiology, Clinical Sciences, Lund University, Lund, Sweden
| | - Lo Persson
- *Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Per Hellstrand
- *Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Bengt-Olof Nilsson
- *Department of Experimental Medical Science, Lund University, Lund, Sweden
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25
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Xie Z, Chang C, Zhou Z. Molecular Mechanisms in Autoimmune Type 1 Diabetes: a Critical Review. Clin Rev Allergy Immunol 2014; 47:174-92. [DOI: 10.1007/s12016-014-8422-2] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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26
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Ramos RDS, Mesquita FS, D'Alexandri FL, Gonella-Diaza AM, Papa PDC, Binelli M. Regulation of the polyamine metabolic pathway in the endometrium of cows during early diestrus. Mol Reprod Dev 2014; 81:584-94. [DOI: 10.1002/mrd.22323] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 03/17/2014] [Indexed: 11/05/2022]
Affiliation(s)
- Roney dos Santos Ramos
- Department of Animal Reproduction; School of Veterinary Medicine and Animal Science; Universidade de São Paulo; Pirassununga Brazil
| | | | - Fabio L. D'Alexandri
- Department of Animal Reproduction; School of Veterinary Medicine and Animal Science; Universidade de São Paulo; Pirassununga Brazil
| | - Angela Maria Gonella-Diaza
- Department of Animal Reproduction; School of Veterinary Medicine and Animal Science; Universidade de São Paulo; Pirassununga Brazil
| | - Paula de Carvalho Papa
- Department of Surgery; School of Veterinary Medicine and Animal Science; Universidade de São Paulo; São Paulo Brazil
| | - Mario Binelli
- Department of Animal Reproduction; School of Veterinary Medicine and Animal Science; Universidade de São Paulo; Pirassununga Brazil
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27
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Tersey SA, Colvin SC, Maier B, Mirmira RG. Protective effects of polyamine depletion in mouse models of type 1 diabetes: implications for therapy. Amino Acids 2014; 46:633-42. [PMID: 23846959 PMCID: PMC3888834 DOI: 10.1007/s00726-013-1560-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2013] [Accepted: 07/03/2013] [Indexed: 01/08/2023]
Abstract
The underlying pathophysiology of type 1 diabetes involves autoimmune-mediated islet inflammation, leading to dysfunction and death of insulin-secreting islet β cells. Recent studies have shown that polyamines, which are essential for mRNA translation, cellular replication, and the formation of the hypusine modification of eIF5A may play an important role in the progression of cellular inflammation. To test a role for polyamines in type 1 diabetes pathogenesis, we administered the ornithine decarboxylase inhibitor difluoromethylornithine to two mouse models--the low-dose streptozotocin model and the NOD model--to deplete intracellular polyamines, and administered streptozotocin to a third model, which was haploinsufficient for the gene encoding the hypusination enzyme deoxyhypusine synthase. Subsequent development of diabetes and/or glucose intolerance was monitored. In the low-dose streptozotocin mouse model, continuous difluoromethylornithine administration dose-dependently reduced the incidence of hyperglycemia and led to the preservation of β cell area, whereas in the NOD mouse model of autoimmune diabetes difluoromethylornithine reduced diabetes incidence by 50%, preserved β cell area and insulin secretion, led to reductions in both islet inflammation and potentially diabetogenic Th17 cells in pancreatic lymph nodes. Difluoromethylornithine treatment reduced hypusinated eIF5A levels in both immune cells and islets. Animals haploinsufficient for the gene encoding deoxyhypusine synthase were partially protected from hyperglycemia induced by streptozotocin. Collectively, these studies suggest that interventions that interfere with polyamine biosynthesis and/or eIF5A hypusination may represent viable approaches in the treatment of diabetes.
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MESH Headings
- Animals
- Diabetes Mellitus, Experimental/chemically induced
- Diabetes Mellitus, Experimental/drug therapy
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Type 1/chemically induced
- Diabetes Mellitus, Type 1/drug therapy
- Diabetes Mellitus, Type 1/metabolism
- Disease Models, Animal
- Dose-Response Relationship, Drug
- Eflornithine/administration & dosage
- Female
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Inbred NOD
- Mice, Knockout
- Oxidoreductases Acting on CH-NH Group Donors/deficiency
- Oxidoreductases Acting on CH-NH Group Donors/metabolism
- Peptide Initiation Factors/metabolism
- Polyamines/metabolism
- RNA-Binding Proteins/metabolism
- Streptozocin/administration & dosage
- Eukaryotic Translation Initiation Factor 5A
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Affiliation(s)
- Sarah A. Tersey
- Department of Pediatrics and the Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Stephanie C. Colvin
- Department of Pediatrics and the Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Bernhard Maier
- Department of Pediatrics and the Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Raghavendra G. Mirmira
- Department of Pediatrics and the Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Departments of Medicine, Cellular and Integrative Physiology, and Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana, USA
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28
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Henrich CJ, Beutler JA. Matching the power of high throughput screening to the chemical diversity of natural products. Nat Prod Rep 2013; 30:1284-98. [PMID: 23925671 PMCID: PMC3801163 DOI: 10.1039/c3np70052f] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Covering up to 2013. Application of high throughput screening technologies to natural product samples demands alterations in assay design as well as sample preparation in order to yield meaningful hit structures at the end of the campaign.
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Affiliation(s)
- Curtis J. Henrich
- Basic Science Program, SAIC-Frederick, Inc. Frederick National Lab
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702 USA
| | - John A. Beutler
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702 USA
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29
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Keinänen TA, Hyvönen MT, Alhonen L, Vepsäläinen J, Khomutov AR. Selective regulation of polyamine metabolism with methylated polyamine analogues. Amino Acids 2013; 46:605-20. [PMID: 24022706 DOI: 10.1007/s00726-013-1587-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 08/27/2013] [Indexed: 12/18/2022]
Abstract
Polyamine metabolism is intimately linked to the physiological state of the cell. Low polyamines levels promote growth cessation, while increased concentrations are often associated with rapid proliferation or cancer. Delicately balanced biosynthesis, catabolism, uptake and excretion are very important for maintaining the intracellular polyamine homeostasis, and deregulated polyamine metabolism is associated with imbalanced metabolic red/ox state. Although many cellular targets of polyamines have been described, the precise molecular mechanisms in these interactions are largely unknown. Polyamines are readily interconvertible which complicate studies on the functions of the individual polyamines. Thus, non-metabolizable polyamine analogues, like carbon-methylated analogues, are needed to circumvent that problem. This review focuses on methylated putrescine, spermidine and spermine analogues in which at least one hydrogen atom attached to polyamine carbon backbone has been replaced by a methyl group. These analogues allow the regulation of both metabolic and catabolic fates of the parent molecule. Substituting the natural polyamines with methylated analogue(s) offers means to study either the functions of an individual polyamine or the effects of altered polyamine metabolism on cell physiology. In general, gem-dimethylated analogues are considered to be non-metabolizable by polyamine catabolizing enzymes spermidine/spermine-N¹-acetyltransferase and acetylpolyamine oxidase and they support short-term cellular proliferation in many experimental models. Monomethylation renders the analogues chiral, offering some advantage over gem-dimethylated analogues in the specific regulation of polyamine metabolism. Thus, methylated polyamine analogues are practical tools to meet existing biological challenges in solving the physiological functions of polyamines.
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30
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Chromatin remodeling by polyamines and polyamine analogs. Amino Acids 2013; 46:595-603. [PMID: 23836422 DOI: 10.1007/s00726-013-1550-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2013] [Accepted: 06/27/2013] [Indexed: 12/23/2022]
Abstract
Natural polyamines are involved in many molecular processes, including maintenance of DNA structure and RNA processing and translation. Our aim here is to present an overview of the literature concerning the significance of polyamines in the modulation of chromatin arrangement and the transcriptional regulation of gene expression. The pleiotropic picture emerging from the published data highlights that these polycations take part in apparently diverging effects, possibly depending on the heterogeneous experimental settings described, and on a methodological approach aimed at the evaluation of the global levels of the histone chemical modifications. Since the relevant changes observed appear to be rather local and gene specific, investigating histone modifications at the level of specific gene promoters of interest is thus to be recommended for future studies. Furthermore, decoding the multiple regulatory mechanisms by which polyamines exert their influence on chromatin-modifier enzymes will reasonably require focus on selected individual polyamine-regulated genes. The evaluation of the many known chromatin-remodeling enzymes for their individual susceptibility to polyamines or polyamine derivatives will also be helpful: determining how they discriminate between the different enzyme isoforms is expected to be a fruitful line of research for drug discovery, e.g., in cancer prevention and therapy. Indeed, polyamine derivatives acting as epigenetic modulators appear to be molecules with great potential as antitumor drugs. All these novel polyamine-based pharmacologically active molecules are thus promising tools, both as a stand-alone strategy and in combination with other anticancer compounds.
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31
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Brooks WH. Increased polyamines alter chromatin and stabilize autoantigens in autoimmune diseases. Front Immunol 2013; 4:91. [PMID: 23616785 PMCID: PMC3627976 DOI: 10.3389/fimmu.2013.00091] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Accepted: 04/04/2013] [Indexed: 11/13/2022] Open
Abstract
Polyamines are small cations with unique combinations of charge and length that give them many putative interactions in cells. Polyamines are essential since they are involved in replication, transcription, translation, and stabilization of macro-molecular complexes. However, polyamine synthesis competes with cellular methylation for S-adenosylmethionine, the methyl donor. Also, polyamine degradation can generate reactive molecules like acrolein. Therefore, polyamine levels are tightly controlled. This control may be compromised in autoimmune diseases since elevated polyamine levels are seen in autoimmune diseases. Here a hypothesis is presented explaining how polyamines can stabilize autoantigens. In addition, the hypothesis explains how polyamines can inappropriately activate enzymes involved in NETosis, a process in which chromatin is modified and extruded from cells as extracellular traps that bind pathogens during an immune response. This polyamine-induced enzymatic activity can lead to an increase in NETosis resulting in release of autoantigenic material and tissue damage.
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Affiliation(s)
- Wesley H Brooks
- Department of Chemistry, University of South Florida Tampa, FL, USA
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32
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Tabassum R, Jaiswal A, Chauhan G, Dwivedi OP, Ghosh S, Marwaha RK, Tandon N, Bharadwaj D. Genetic variant of AMD1 is associated with obesity in urban Indian children. PLoS One 2012; 7:e33162. [PMID: 22496743 PMCID: PMC3322123 DOI: 10.1371/journal.pone.0033162] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 02/04/2012] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Hyperhomocysteinemia is regarded as a risk factor for cardiovascular diseases, diabetes and obesity. Manifestation of these chronic metabolic disorders starts in early life marked by increase in body mass index (BMI). We hypothesized that perturbations in homocysteine metabolism in early life could be a link between childhood obesity and adult metabolic disorders. Thus here we investigated association of common variants from homocysteine metabolism pathway genes with obesity in 3,168 urban Indian children. METHODOLOGY/PRINCIPAL FINDINGS We genotyped 90 common variants from 18 genes in 1,325 children comprising of 862 normal-weight (NW) and 463 over-weight/obese (OW/OB) children in stage 1. The top signal obtained was replicated in an independent sample set of 1843 children (1,399 NW and 444 OW/OB) in stage 2. Stage 1 association analysis revealed association between seven variants and childhood obesity at P<0.05, but association of only rs2796749 in AMD1 [OR = 1.41, P = 1.5×10(-4)] remained significant after multiple testing correction. Association of rs2796749 with childhood obesity was validated in stage 2 [OR = 1.28, P = 4.2×10(-3)] and meta-analysis [OR = 1.35, P = 1.9×10(-6)]. AMD1 variant rs2796749 was also associated with quantitative measures of adiposity and plasma leptin levels that was also replicated and corroborated in combined analysis. CONCLUSIONS/SIGNIFICANCE Our study provides first evidence for the association of AMD1 variant with obesity and plasma leptin levels in children. Further studies to confirm this association, its functional significance and mechanism of action need to be undertaken.
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Affiliation(s)
- Rubina Tabassum
- Genomics and Molecular Medicine Unit, CSIR-Institute of Genomics and Integrative Biology, Delhi, India
| | - Alok Jaiswal
- Genomics and Molecular Medicine Unit, CSIR-Institute of Genomics and Integrative Biology, Delhi, India
| | - Ganesh Chauhan
- Genomics and Molecular Medicine Unit, CSIR-Institute of Genomics and Integrative Biology, Delhi, India
| | - Om Prakash Dwivedi
- Genomics and Molecular Medicine Unit, CSIR-Institute of Genomics and Integrative Biology, Delhi, India
| | - Saurabh Ghosh
- Human Genetics Unit, Indian Statistical Institute, Kolkata, India
| | - Raman K. Marwaha
- Department of Endocrinology and Thyroid Research, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
| | - Nikhil Tandon
- Department of Endocrinology, All India Institute of Medical Sciences, New Delhi, India
| | - Dwaipayan Bharadwaj
- Genomics and Molecular Medicine Unit, CSIR-Institute of Genomics and Integrative Biology, Delhi, India
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