1
|
López-Armada MJ, Fernández-Rodríguez JA, Blanco FJ. Mitochondrial Dysfunction and Oxidative Stress in Rheumatoid Arthritis. Antioxidants (Basel) 2022; 11:antiox11061151. [PMID: 35740048 PMCID: PMC9220001 DOI: 10.3390/antiox11061151] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 02/04/2023] Open
Abstract
Control of excessive mitochondrial oxidative stress could provide new targets for both preventive and therapeutic interventions in the treatment of chronic inflammation or any pathology that develops under an inflammatory scenario, such as rheumatoid arthritis (RA). Increasing evidence has demonstrated the role of mitochondrial alterations in autoimmune diseases mainly due to the interplay between metabolism and innate immunity, but also in the modulation of inflammatory response of resident cells, such as synoviocytes. Thus, mitochondrial dysfunction derived from several danger signals could activate tricarboxylic acid (TCA) disruption, thereby favoring a vicious cycle of oxidative/mitochondrial stress. Mitochondrial dysfunction can act through modulating innate immunity via redox-sensitive inflammatory pathways or direct activation of the inflammasome. Besides, mitochondria also have a central role in regulating cell death, which is deeply altered in RA. Additionally, multiple evidence suggests that pathological processes in RA can be shaped by epigenetic mechanisms and that in turn, mitochondria are involved in epigenetic regulation. Finally, we will discuss about the involvement of some dietary components in the onset and progression of RA.
Collapse
Affiliation(s)
- María José López-Armada
- Grupo de Investigación en Envejecimiento e Inflamación (ENVEINF), Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Sergas, 15006 A Coruña, Spain;
- Correspondence: (M.J.L.-A.); (F.J.B.); Tel./Fax: +34-981-178272-73 (M.J.L.-A.)
| | - Jennifer Adriana Fernández-Rodríguez
- Grupo de Investigación en Envejecimiento e Inflamación (ENVEINF), Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Sergas, 15006 A Coruña, Spain;
| | - Francisco Javier Blanco
- Grupo de Investigación de Reumatología (GIR), Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Sergas, 15006 A Coruña, Spain
- Grupo de Investigación de Reumatología y Salud (GIR-S), Departamento de Fisioterapia, Medicina y Ciencias Biomédicas, Facultad de Fisioterapia, Campus de Oza, Universidade da Coruña, 15001 A Coruña, Spain
- Correspondence: (M.J.L.-A.); (F.J.B.); Tel./Fax: +34-981-178272-73 (M.J.L.-A.)
| |
Collapse
|
2
|
Li M, Luo X, Long X, Jiang P, Jiang Q, Guo H, Chen Z. Potential role of mitochondria in synoviocytes. Clin Rheumatol 2020; 40:447-457. [PMID: 32613391 DOI: 10.1007/s10067-020-05263-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/20/2020] [Accepted: 06/23/2020] [Indexed: 12/13/2022]
Abstract
Synoviocytes are located in the synovium lining layer, which is composed of macrophage-like synoviocytes (MLS) and fibroblast-like synoviocytes (FLS) with different characteristics. Mitochondria, which exist in most cells, are two membrane-covered organelles. In addition to providing the necessary ATP for synoviocytes, mitochondria are involved in the regulation of redox homeostasis and the integration of synoviocytes death signals. In recent years, mitochondrial dysfunction has been found in rheumatoid arthritis (RA) and osteoarthritis (OA). Interestingly, recent studies have started uncovering that mitochondria that were previously reported to play a role in chondrocytes or immune cells, but not known to have pronounced roles in synoviocytes, can actually play crucial roles in the regulation of the pathological properties of the synoviocytes. The purpose of this review is to summarize our current understanding of the key role of mitochondria in synoviocytes, including mitochondrial dysfunction in synoviocytes can induce and aggravate inflammatory responses and changes in mitochondrial structure and function with the involvement of multiple cytokines, signal pathway, and hypoxic state of synovial tissue alter the response of synoviocytes to apoptotic stimulation. Also, mitochondrial abnormalities in synoviocytes promote the synoviocytes invasion and proliferation.
Collapse
Affiliation(s)
- Muzhe Li
- Department of Orthopedic, the First Affiliated Hospital of University of South China, No. 69, Chuanshan Road, Hengyang City, 421001, Hunan Province, China
| | - Xuling Luo
- Department of Orthopedic, the First Affiliated Hospital of University of South China, No. 69, Chuanshan Road, Hengyang City, 421001, Hunan Province, China
| | - Xin Long
- Department of Orthopedic, the First Affiliated Hospital of University of South China, No. 69, Chuanshan Road, Hengyang City, 421001, Hunan Province, China
| | - Peishi Jiang
- Department of Orthopedic, the First Affiliated Hospital of University of South China, No. 69, Chuanshan Road, Hengyang City, 421001, Hunan Province, China
| | - Qin Jiang
- Department of Orthopedic, the First Affiliated Hospital of University of South China, No. 69, Chuanshan Road, Hengyang City, 421001, Hunan Province, China
| | - Heng Guo
- Department of Orthopedic, the First Affiliated Hospital of University of South China, No. 69, Chuanshan Road, Hengyang City, 421001, Hunan Province, China
| | - Zhiwei Chen
- Department of Orthopedic, the First Affiliated Hospital of University of South China, No. 69, Chuanshan Road, Hengyang City, 421001, Hunan Province, China.
| |
Collapse
|
3
|
Vaamonde-García C, López-Armada MJ. Role of mitochondrial dysfunction on rheumatic diseases. Biochem Pharmacol 2019; 165:181-195. [DOI: 10.1016/j.bcp.2019.03.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 03/07/2019] [Indexed: 02/09/2023]
|
4
|
Balogh E, Veale DJ, McGarry T, Orr C, Szekanecz Z, Ng CT, Fearon U, Biniecka M. Oxidative stress impairs energy metabolism in primary cells and synovial tissue of patients with rheumatoid arthritis. Arthritis Res Ther 2018; 20:95. [PMID: 29843785 PMCID: PMC5972404 DOI: 10.1186/s13075-018-1592-1] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 04/12/2018] [Indexed: 03/18/2023] Open
Abstract
Background In this study, we examined the effect of oxidative stress on cellular energy metabolism and pro-angiogenic/pro-inflammatory mechanisms of primary rheumatoid arthritis synovial fibroblast cells (RASFC) and human umbilical vein endothelial cells (HUVEC). Methods Primary RASFC and HUVEC were cultured with the oxidative stress inducer 4-hydroxy-2-nonenal (4-HNE), and extracellular acidification rate, oxygen consumption rate, mitochondrial function and pro-angiogenic/pro-inflammatory mechanisms were assessed using the Seahorse analyser, complex I–V activity assays, random mutation mitochondrial capture assays, enzyme-linked immunosorbent assays and functional assays, including angiogenic tube formation, migration and invasion. Expression of angiogenic growth factors in synovial tissue (ST) was assessed by IHC in patients with rheumatoid arthritis (RA) undergoing arthroscopy before and after administration of tumour necrosis factor inhibitors (TNFi). Results In RASFC and HUVEC, 4-HNE-induced oxidative stress reprogrammed energy metabolism by inhibiting mitochondrial basal, maximal and adenosine triphosphate-linked respiration and reserve capacity, coupled with the reduced enzymatic activity of oxidative phosphorylation complexes III and IV. In contrast, 4-HNE elevated basal glycolysis, glycolytic capacity and glycolytic reserve, paralleled by an increase in mitochondrial DNA mutations and reactive oxygen species. 4-HNE activated pro-angiogenic responses of RASFC, which subsequently altered HUVEC invasion and migration, angiogenic tube formation and the release of pro-angiogenic mediators. In vivo markers of angiogenesis (vascular endothelial growth factor, angiopoietin 2 [Ang2], tyrosine kinase receptor [Tie2]) were significantly associated with oxidative damage and oxygen metabolism in the inflamed synovium. Significant reduction in ST vascularity and Ang2/Tie2 expression was demonstrated in patients with RA before and after administration of TNFi. Conclusions Oxidative stress promotes metabolism in favour of glycolysis, an effect that may contribute to acceleration of inflammatory mechanisms and subsequent dysfunctional angiogenesis in RA. Electronic supplementary material The online version of this article (10.1186/s13075-018-1592-1) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Emese Balogh
- Department of Rheumatology, University of Debrecen Medical and Health Science Centre, 98. Nagyerdei krt, Debrecen, Hungary
| | - Douglas J Veale
- Centre for Arthritis and Rheumatic Diseases, Dublin Academic Medical Centre, St. Vincent's University Hospital, Dublin, Ireland
| | - Trudy McGarry
- Molecular Rheumatology, Trinity Biomedical Sciences Institute Trinity College Dublin, Dublin, Ireland
| | - Carl Orr
- Centre for Arthritis and Rheumatic Diseases, Dublin Academic Medical Centre, St. Vincent's University Hospital, Dublin, Ireland
| | - Zoltan Szekanecz
- Department of Rheumatology, University of Debrecen Medical and Health Science Centre, 98. Nagyerdei krt, Debrecen, Hungary
| | - Chin-Teck Ng
- Department of Rheumatology and Immunology, Singapore General Hospital, Singapore, Singapore.,Duke-NUS Medical School, Singapore, Singapore
| | - Ursula Fearon
- Molecular Rheumatology, Trinity Biomedical Sciences Institute Trinity College Dublin, Dublin, Ireland
| | - Monika Biniecka
- Centre for Arthritis and Rheumatic Diseases, Dublin Academic Medical Centre, St. Vincent's University Hospital, Dublin, Ireland.
| |
Collapse
|
5
|
Vaamonde-García C, Loureiro J, Valcárcel-Ares MN, Riveiro-Naveira RR, Ramil-Gómez O, Hermida-Carballo L, Centeno A, Meijide-Failde R, Blanco FJ, López-Armada MJ. The mitochondrial inhibitor oligomycin induces an inflammatory response in the rat knee joint. BMC Musculoskelet Disord 2017; 18:254. [PMID: 28606072 PMCID: PMC5469149 DOI: 10.1186/s12891-017-1621-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 06/06/2017] [Indexed: 01/30/2023] Open
Abstract
Background Recent findings support a connection between mitochondrial dysfunction and activation of inflammatory pathways in articular cells. This study investigates in vivo in an acute model whether intra-articular administration of oligomycin, an inhibitor of mitochondrial function, induces an oxidative and inflammatory response in rat knee joints. Methods Oligomycin was injected into the rat left knee joint on days 0, 2, and 5 before joint tissues were obtained on day 6. The right knee joint served as control. Results were evaluated by macroscopy and histopathology and by measuring cellular and mitochondrial reactive oxygen species (ROS), 4-hydroxy-2-nonenal (4-HNE, a marker of lipid peroxidation), nuclear factor erythroid 2-related factor 2 (Nrf2), and CD68 (macrophages) and chemokine levels. The marker of mitochondrial mass COX-IV was also evaluated. Results The macroscopic findings showed significantly greater swelling in oligomycin-injected knees than in control knees. Likewise, the histological score of synovial damage was also increased significantly. Immunohistochemical studies showed high expression of IL-8, coinciding with a marked infiltration of polymorphonuclears and CD68+ cells in the synovium. Mitochondrial mass was increased in the synovium of oligomycin-injected joints, as well as cellular and mitochondrial ROS production, and 4-HNE. Relatedly, expression of the oxidative stress-related transcription factor Nrf2 was also increased. As expected, no histological differences were observed in the cartilage; however, cytokine-induced neutrophil chemoattractant-1 mRNA and protein expression were up-regulated in this tissue. Conclusions Mitochondrial failure in the joint is able to reproduce the oxidative and inflammatory status observed in arthritic joints. Electronic supplementary material The online version of this article (doi:10.1186/s12891-017-1621-2) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Carlos Vaamonde-García
- Aging and Inflammation Research Lab, Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario A Coruña (CHUAC), Sergas, Universidade da Coruña (UDC), As Xubias, 15006, A Coruña, Spain.,Tissue Engineering and Cellular Therapy Group, INIBIC, Department of Medicine, Faculty of Health Sciences- UDC, Campus Oza, A Coruña, Spain
| | - Jesús Loureiro
- Aging and Inflammation Research Lab, Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario A Coruña (CHUAC), Sergas, Universidade da Coruña (UDC), As Xubias, 15006, A Coruña, Spain
| | - Marta N Valcárcel-Ares
- Aging and Inflammation Research Lab, Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario A Coruña (CHUAC), Sergas, Universidade da Coruña (UDC), As Xubias, 15006, A Coruña, Spain
| | - Romina R Riveiro-Naveira
- Aging and Inflammation Research Lab, Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario A Coruña (CHUAC), Sergas, Universidade da Coruña (UDC), As Xubias, 15006, A Coruña, Spain
| | - Olalla Ramil-Gómez
- Aging and Inflammation Research Lab, Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario A Coruña (CHUAC), Sergas, Universidade da Coruña (UDC), As Xubias, 15006, A Coruña, Spain
| | - Laura Hermida-Carballo
- Aging and Inflammation Research Lab, Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario A Coruña (CHUAC), Sergas, Universidade da Coruña (UDC), As Xubias, 15006, A Coruña, Spain
| | | | - Rosa Meijide-Failde
- Tissue Engineering and Cellular Therapy Group, INIBIC, Department of Medicine, Faculty of Health Sciences- UDC, Campus Oza, A Coruña, Spain
| | - Francisco J Blanco
- Osteoarticular and Aging Research Lab, Rheumatology Service, INIBIC, CHUAC, Sergas, UDC, A Coruña, Spain
| | - María J López-Armada
- Aging and Inflammation Research Lab, Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario A Coruña (CHUAC), Sergas, Universidade da Coruña (UDC), As Xubias, 15006, A Coruña, Spain.
| |
Collapse
|
6
|
Cellular and molecular perspectives in rheumatoid arthritis. Semin Immunopathol 2017; 39:343-354. [PMID: 28508153 DOI: 10.1007/s00281-017-0633-1] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Accepted: 04/17/2017] [Indexed: 12/13/2022]
Abstract
Synovial immunopathology in rheumatoid arthritis is complex involving both resident and infiltrating cells. The synovial tissue undergoes significant neovascularization, facilitating an influx of lymphocytes and monocytes that transform a typically acellular loose areolar membrane into an invasive tumour-like pannus. The microvasculature proliferates to form straight regularly-branching vessels; however, they are highly dysfunctional resulting in reduced oxygen supply and a hypoxic microenvironment. Autoantibodies such as rheumatoid factor and anti-citrullinated protein antibodies are found at an early stage, often before arthritis has developed, and they have been implicated in the pathogenesis of RA. Abnormal cellular metabolism and mitochondrial dysfunction thus ensue and, in turn, through the increased production of reactive oxygen species actively induce inflammation. Key pro-inflammatory cytokines, chemokines and growth factors and their signalling pathways, including nuclear factor κB, Janus kinase-signal transducer, are highly activated when immune cells are exposed to hypoxia in the inflamed rheumatoid joint show adaptive survival reactions by activating. This review attempts to highlight those aberrations in the innate and adaptive immune systems including the role of genetic and environmental factors, autoantibodies, cellular alterations, signalling pathways and metabolism that are implicated in the pathogenesis of RA and may therefore provide an opportunity for therapeutic intervention.
Collapse
|
7
|
Fernández-Moreno M, Soto-Hermida A, Vázquez-Mosquera ME, Cortés-Pereira E, Relaño S, Hermida-Gómez T, Pértega S, Oreiro-Villar N, Fernández-López C, Garesse R, Blanco FJ, Rego-Pérez I. Mitochondrial DNA haplogroups influence the risk of incident knee osteoarthritis in OAI and CHECK cohorts. A meta-analysis and functional study. Ann Rheum Dis 2016; 76:1114-1122. [DOI: 10.1136/annrheumdis-2016-210131] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 09/22/2016] [Accepted: 11/05/2016] [Indexed: 11/03/2022]
Abstract
ObjectiveTo evaluate the influence of the mitochondrial DNA (mtDNA) haplogroups in the risk of incident knee osteoarthritis (OA) and to explain the functional consequences of this association to identify potential diagnostic biomarkers and therapeutic targets.MethodsTwo prospective cohorts contributed participants. The osteoarthritis initiative (OAI) included 2579 subjects of the incidence subcohort, and the cohort hip and cohort knee (CHECK) included 635, both with 8-year follow-up. The analysis included the association of mtDNA haplogroups with the rate of incident knee OA in subjects from both cohorts followed by a subsequent meta-analysis. Transmitochondrial cybrids harbouring haplogroup J or H were constructed to detect differences between them in relation to physiological features including specific mitochondrial metabolic parameters, reactive oxygen species production, oxidative stress and apoptosis.ResultsCompared with H, the haplogroup J associates with decreased risk of incident knee OA in subjects from OAI (HR=0.680; 95% CI 0.470 to 0.968; p<0.05) and CHECK (HR=0.728; 95% CI 0.469 to 0.998; p<0.05). The subsequent meta-analysis including 3214 cases showed that the haplogroup J associates with a lower risk of incident knee OA (HR=0.702; 95% CI 0.541 to 0.912; p=0.008). J cybrids show a lower free radical production, higher cell survival under oxidative stress conditions, lower grade of apoptosis as well as lower expression of the mitochondrially related pro-apoptotic gene BCL2 binding component 3 (BBC3). In addition, J cybrids also show a lower mitochondrial respiration and glycolysis leading to decreased ATP production.ConclusionsThe physiological effects of the haplogroup J are beneficial to have a lower rate of incident knee OA over time. Potential drugs to treat OA could focus on emulating the mitochondrial behaviour of this haplogroup.
Collapse
|
8
|
Hosseinzadeh A, Kamrava SK, Joghataei MT, Darabi R, Shakeri-Zadeh A, Shahriari M, Reiter RJ, Ghaznavi H, Mehrzadi S. Apoptosis signaling pathways in osteoarthritis and possible protective role of melatonin. J Pineal Res 2016; 61:411-425. [PMID: 27555371 DOI: 10.1111/jpi.12362] [Citation(s) in RCA: 240] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 08/22/2016] [Indexed: 12/14/2022]
Abstract
Osteoarthritis (OA) is a degenerative joint disease characterized by progressive erosion of articular cartilage. As chondrocytes are the only cell type forming the articular cartilage, their gradual loss is the main cause of OA. There is a substantial body of published research that suggests reactive oxygen species (ROS) are major causative factors for chondrocyte damage and OA development. Oxidative stress elicited by ROS is capable of oxidizing and subsequently disrupting cartilage homeostasis, promoting catabolism via induction of cell death and damaging numerous components of the joint. IL-1β and TNF-α are crucial inflammatory factors that play pivotal roles in the pathogenesis of OA. In this process, the mitochondria are the major source of ROS production in cells, suggesting a role of mitochondrial dysfunction in this type of arthritis. This may also be promoted by inflammatory cytokines such as IL-1β and TNF-α which contribute to chondrocyte death. In patients with OA, the expression of endoplasmic reticulum (ER) stress-associated molecules is positively correlated with cartilage degeneration. Melatonin and its metabolites are broad-spectrum antioxidants and free radical scavengers which regulate a variety of molecular pathways such as inflammation, proliferation, apoptosis, and metastasis in different pathophysiological situations. Herein, we review the effects of melatonin on OA, focusing on its ability to regulate apoptotic processes and ER and mitochondrial activity. We also evaluate likely protective effects of melatonin on OA pathogenesis.
Collapse
Affiliation(s)
- Azam Hosseinzadeh
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Seyed Kamran Kamrava
- ENT and Head & Neck Research Center, Hazrate Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | | | - Radbod Darabi
- Center for Stem Cell and Regenerative Medicine (CSCRM), Brown Foundation Institute of Molecular Medicine (IMM), University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Ali Shakeri-Zadeh
- Medical Physics Department, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mansour Shahriari
- Ophthalmology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Russel J Reiter
- Department of Cellular and Structural Biology, The University of Texas Health Science Center, San Antonio, TX, USA
| | | | - Saeed Mehrzadi
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. ,
| |
Collapse
|
9
|
Chen L, Duvvuri B, Grigull J, Jamnik R, Wither JE, Wu GE. Experimental evidence that mutated-self peptides derived from mitochondrial DNA somatic mutations have the potential to trigger autoimmunity. Hum Immunol 2014; 75:873-9. [PMID: 24979674 DOI: 10.1016/j.humimm.2014.06.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 06/19/2014] [Accepted: 06/19/2014] [Indexed: 12/20/2022]
Abstract
Autoimmune disease is a critical health concern, whose etiology remains enigmatic. We hypothesized that immune responses to somatically mutated self proteins could have a role in the development of autoimmune disease. IFN-γ secretion by T cells stimulated with mitochondrial peptides encoded by published mitochondrial DNA was monitored to test the hypothesis. Human peripheral blood mononuclear cells (PBMCs) of healthy controls and autoimmune patients were assessed for their responses to the self peptides and mutated-self peptides differing from self by one amino acid. None of the self peptides but some of the mutated-self peptides elicited an immune response in healthy controls. In some autoimmune patients, PBMCs responded not only to some of the mutated-self peptides, but also to some of the self peptides, suggesting that there is a breach of self-tolerance in these patients. Although PBMCs from healthy controls failed to respond to self peptides when stimulated with self, the mutated-self peptide could elicit a response to the self peptide upon re-stimulation in vitro, suggesting that priming with mutated-self peptides elicits a cross-reactive response with self. The data raise the possibility that DNA somatic mutations are one of the events that trigger and/or sustain T cell responses in autoimmune diseases.
Collapse
Affiliation(s)
- Lina Chen
- Department of Kinesiology and Health Science, York University, Canada.
| | - Bhargavi Duvvuri
- Department of Kinesiology and Health Science, York University, Canada
| | - Jörg Grigull
- Department of Mathematics and Statistics, York University, Canada
| | - Roni Jamnik
- Department of Kinesiology and Health Science, York University, Canada
| | - Joan E Wither
- University Health Network and University of Toronto, Canada
| | - Gillian E Wu
- Department of Kinesiology and Health Science, York University, Canada
| |
Collapse
|
10
|
Ishibashi T. Molecular hydrogen: new antioxidant and anti-inflammatory therapy for rheumatoid arthritis and related diseases. Curr Pharm Des 2014; 19:6375-81. [PMID: 23859555 PMCID: PMC3788323 DOI: 10.2174/13816128113199990507] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Accepted: 07/09/2013] [Indexed: 12/17/2022]
Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory disease in which the progressive destruction of joint causes morbidity. It is also associated with an increased risk of atherosclerosis, which can result in cardiovascular disease and mortality. The therapeutic goal is to control the systemic inflammation to obtain not only the remission of symptoms, but also improve general state of health. Although recent biologic immunosuppressive therapies targeting pro-inflammatory cytokines have spawned a paradigm shift regarding the prognosis of RA, these therapies possess inherent side effects. Also, early diagnosis of the disease remains confounded by uncertainty. While the mechanisms responsible for the onset of RA remain unclear, reactive oxygen species (ROS) play a significant role in the pathogenesis of RA. ROS play a central role both upstream and downstream of NF-κB and TNFα pathways, which are located at the center of the inflammatory response. Among the ROS, the hydroxyl radical is the most harmful, and molecular hydrogen (H2) is a selective scavenger for this species. Recently, it has been shown that H2 is useful when administered along with the conventional therapy in RA as it acts to reduce oxidative stress in the patients. Especially in the early stage, H2 showed significant therapeutic potential, which also seemed to assist diagnosis and treatment decisions of RA. The possible expectations regarding the potential benefits of H2 by reducing the oxidative stress, resulting from inflammatory factors, are raised and discussed here. They include prevention of RA and related atherosclerosis, as well as therapeutic validity for RA
Collapse
Affiliation(s)
- Toru Ishibashi
- Haradoi Hospital, Department of Rheumatology and Orthopaedic Surgery, 6-40-8 Aoba, Higashi-ku, Fukuoka 813-8588, Japan.
| |
Collapse
|
11
|
Valcárcel-Ares MN, Riveiro-Naveira RR, Vaamonde-García C, Loureiro J, Hermida-Carballo L, Blanco FJ, López-Armada MJ. Mitochondrial dysfunction promotes and aggravates the inflammatory response in normal human synoviocytes. Rheumatology (Oxford) 2014; 53:1332-43. [DOI: 10.1093/rheumatology/keu016] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
12
|
López-Armada MJ, Riveiro-Naveira RR, Vaamonde-García C, Valcárcel-Ares MN. Mitochondrial dysfunction and the inflammatory response. Mitochondrion 2013; 13:106-18. [PMID: 23333405 DOI: 10.1016/j.mito.2013.01.003] [Citation(s) in RCA: 345] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 11/30/2012] [Accepted: 01/07/2013] [Indexed: 12/18/2022]
Abstract
Inflammation has been linked to multiple degenerative and acute diseases as well as the aging process. Moreover, mitochondrial alterations play a central role in these processes. Mitochondria have an important role in pro-inflammatory signaling; similarly, pro-inflammatory mediators may also alter mitochondrial function. Both of these processes increase mitochondrial oxidative stress, promoting a vicious inflammatory cycle. Additionally, damage-associated molecular patterns derived from mitochondria could contribute to inflammasome formation and caspase-1 activation, while alterations in mitochondrial autophagy may cause inflammation. Strategies aimed at controlling excessive oxidative stress within mitochondria may represent both preventive and therapeutic interventions in inflammation.
Collapse
Affiliation(s)
- María J López-Armada
- Aging and Inflammation Research Laboratory, Instituto de Investigación Biomédica A Coruña (INIBIC)-Complexo Hospitalario Universitario A Coruña (CHUAC)-SERGAS, Xubias 84, 15006, A Coruña, Spain.
| | | | | | | |
Collapse
|
13
|
Biniecka M, Kennedy A, Ng CT, Chang TC, Balogh E, Fox E, Veale DJ, Fearon U, O'Sullivan JN. Successful tumour necrosis factor (TNF) blocking therapy suppresses oxidative stress and hypoxia-induced mitochondrial mutagenesis in inflammatory arthritis. Arthritis Res Ther 2011; 13:R121. [PMID: 21787418 PMCID: PMC3239359 DOI: 10.1186/ar3424] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Revised: 06/02/2011] [Accepted: 07/25/2011] [Indexed: 11/23/2022] Open
Abstract
Introduction To examine the effects of tumour necrosis factor (TNF) blocking therapy on the levels of early mitochondrial genome alterations and oxidative stress. Methods Eighteen inflammatory arthritis patients underwent synovial tissue oxygen (tpO2) measurements and clinical assessment of disease activity (DAS28-CRP) at baseline (T0) and three months (T3) after starting biologic therapy. Synovial tissue lipid peroxidation (4-HNE), T and B cell specific markers and synovial vascular endothelial growth factor (VEGF) were quantified by immunohistochemistry. Synovial levels of random mitochondrial DNA (mtDNA) mutations were assessed using Random Mutation Capture (RMC) assay. Results 4-HNE levels pre/post anti TNF-α therapy were inversely correlated with in vivo tpO2 (P < 0.008; r = -0.60). Biologic therapy responders showed a significantly reduced 4-HNE expression (P < 0.05). High 4-HNE expression correlated with high DAS28-CRP (P = 0.02; r = 0.53), tender joint count for 28 joints (TJC-28) (P = 0.03; r = 0.49), swollen joint count for 28 joints (SJC-28) (P = 0.03; r = 0.50) and visual analogue scale (VAS) (P = 0.04; r = 0.48). Strong positive association was found between the number of 4-HNE positive cells and CD4+ cells (P = 0.04; r = 0.60), CD8+ cells (P = 0.001; r = 0.70), CD20+ cells (P = 0.04; r = 0.68), CD68+ cells (P = 0.04; r = 0.47) and synovial VEGF expression (P = 0.01; r = 063). In patients whose in vivo tpO2 levels improved post treatment, significant reduction in mtDNA mutations and DAS28-CRP was observed (P < 0.05). In contrast in those patients whose tpO2 levels remained the same or reduced at T3, no significant changes for mtDNA mutations and DAS28-CRP were found. Conclusions High levels of synovial oxidative stress and mitochondrial mutation burden are strongly associated with low in vivo oxygen tension and synovial inflammation. Furthermore these significant mitochondrial genome alterations are rescued following successful anti TNF-α treatment.
Collapse
Affiliation(s)
- Monika Biniecka
- Translation Rheumatology Research Group, Dublin Academic Medical Centre, The Conway Institute of Biomolecular and Biomedical Research, St. Vincent’s University Hospital, Elm Park, Dublin 4, Ireland
| | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Verma M, Kumar D. Application of mitochondrial genome information in cancer epidemiology. Clin Chim Acta 2007; 383:41-50. [PMID: 17532310 DOI: 10.1016/j.cca.2007.04.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2007] [Revised: 04/02/2007] [Accepted: 04/07/2007] [Indexed: 12/18/2022]
Abstract
Two genomes, nuclear and mitochondrial, exist in humans although information contained in the mitochondrial genome has not been fully utilized in cancer epidemiology. Over the last few years, a variety of approaches have been developed to improve results of conventional cancer screening by detecting molecular markers in different populations. Mitochondrial DNA alterations (mutations, deletions and instability) are emerging as new molecular markers for detecting a variety of cancers in tissue samples and biofluids which can be included in population screening studies. Since mitochondrial genome is small (16.6 kb) and high-throughput assays have been developed for sequencing whole mitochondrial genome, it can be adopted by most of the laboratories conducting epidemiological studies. Applications of mitochondrial DNA markers to identify high risk populations and future challenges are discussed in this article.
Collapse
Affiliation(s)
- Mukesh Verma
- Analytic Epidemiology Research Branch, Epidemiology and Genetics Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, Rockville, MD 20852, USA.
| | | |
Collapse
|