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Kombe Kombe AJ, Fotoohabadi L, Nanduri R, Gerasimova Y, Daskou M, Gain C, Sharma E, Wong M, Kelesidis T. The Role of the Nrf2 Pathway in Airway Tissue Damage Due to Viral Respiratory Infections. Int J Mol Sci 2024; 25:7042. [PMID: 39000157 PMCID: PMC11241721 DOI: 10.3390/ijms25137042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Revised: 06/14/2024] [Accepted: 06/20/2024] [Indexed: 07/16/2024] Open
Abstract
Respiratory viruses constitute a significant cause of illness and death worldwide. Respiratory virus-associated injuries include oxidative stress, ferroptosis, inflammation, pyroptosis, apoptosis, fibrosis, autoimmunity, and vascular injury. Several studies have demonstrated the involvement of the nuclear factor erythroid 2-related factor 2 (Nrf2) in the pathophysiology of viral infection and associated complications. It has thus emerged as a pivotal player in cellular defense mechanisms against such damage. Here, we discuss the impact of Nrf2 activation on airway injuries induced by respiratory viruses, including viruses, coronaviruses, rhinoviruses, and respiratory syncytial viruses. The inhibition or deregulation of Nrf2 pathway activation induces airway tissue damage in the presence of viral respiratory infections. In contrast, Nrf2 pathway activation demonstrates protection against tissue and organ injuries. Clinical trials involving Nrf2 agonists are needed to define the effect of Nrf2 therapeutics on airway tissues and organs damaged by viral respiratory infections.
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Affiliation(s)
- Arnaud John Kombe Kombe
- Division of Infectious Diseases and Geographic Medicine, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (A.J.K.K.)
| | - Leila Fotoohabadi
- Division of Infectious Diseases and Geographic Medicine, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (A.J.K.K.)
| | - Ravikanth Nanduri
- Division of Infectious Diseases and Geographic Medicine, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (A.J.K.K.)
| | - Yulia Gerasimova
- Division of Infectious Diseases and Geographic Medicine, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (A.J.K.K.)
| | - Maria Daskou
- Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Chandrima Gain
- Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Eashan Sharma
- Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Michael Wong
- Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Theodoros Kelesidis
- Division of Infectious Diseases and Geographic Medicine, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (A.J.K.K.)
- Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
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Daskou M, Fotooh Abadi L, Gain C, Wong M, Sharma E, Kombe Kombe AJ, Nanduri R, Kelesidis T. The Role of the NRF2 Pathway in the Pathogenesis of Viral Respiratory Infections. Pathogens 2023; 13:39. [PMID: 38251346 PMCID: PMC10819673 DOI: 10.3390/pathogens13010039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 12/27/2023] [Accepted: 12/28/2023] [Indexed: 01/23/2024] Open
Abstract
In humans, acute and chronic respiratory infections caused by viruses are associated with considerable morbidity and mortality. Respiratory viruses infect airway epithelial cells and induce oxidative stress, yet the exact pathogenesis remains unclear. Oxidative stress activates the transcription factor NRF2, which plays a key role in alleviating redox-induced cellular injury. The transcriptional activation of NRF2 has been reported to affect both viral replication and associated inflammation pathways. There is complex bidirectional crosstalk between virus replication and the NRF2 pathway because virus replication directly or indirectly regulates NRF2 expression, and NRF2 activation can reversely hamper viral replication and viral spread across cells and tissues. In this review, we discuss the complex role of the NRF2 pathway in the regulation of the pathogenesis of the main respiratory viruses, including coronaviruses, influenza viruses, respiratory syncytial virus (RSV), and rhinoviruses. We also summarize the scientific evidence regarding the effects of the known NRF2 agonists that can be utilized to alter the NRF2 pathway.
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Affiliation(s)
- Maria Daskou
- Department of Medicine, Division of Infectious Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Leila Fotooh Abadi
- Department of Internal Medicine, Division of Infectious Diseases and Geographic Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (L.F.A.); (R.N.)
| | - Chandrima Gain
- Department of Medicine, Division of Infectious Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Michael Wong
- Department of Medicine, Division of Infectious Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Eashan Sharma
- Department of Medicine, Division of Infectious Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Arnaud John Kombe Kombe
- Department of Internal Medicine, Division of Infectious Diseases and Geographic Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (L.F.A.); (R.N.)
| | - Ravikanth Nanduri
- Department of Internal Medicine, Division of Infectious Diseases and Geographic Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (L.F.A.); (R.N.)
| | - Theodoros Kelesidis
- Department of Medicine, Division of Infectious Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
- Department of Internal Medicine, Division of Infectious Diseases and Geographic Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (L.F.A.); (R.N.)
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3
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Liu J, Han X, Zhang T, Tian K, Li Z, Luo F. Reactive oxygen species (ROS) scavenging biomaterials for anti-inflammatory diseases: from mechanism to therapy. J Hematol Oncol 2023; 16:116. [PMID: 38037103 PMCID: PMC10687997 DOI: 10.1186/s13045-023-01512-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 11/17/2023] [Indexed: 12/02/2023] Open
Abstract
Inflammation is a fundamental defensive response to harmful stimuli, but the overactivation of inflammatory responses is associated with most human diseases. Reactive oxygen species (ROS) are a class of chemicals that are generated after the incomplete reduction of molecular oxygen. At moderate levels, ROS function as critical signaling molecules in the modulation of various physiological functions, including inflammatory responses. However, at excessive levels, ROS exert toxic effects and directly oxidize biological macromolecules, such as proteins, nucleic acids and lipids, further exacerbating the development of inflammatory responses and causing various inflammatory diseases. Therefore, designing and manufacturing biomaterials that scavenge ROS has emerged an important approach for restoring ROS homeostasis, limiting inflammatory responses and protecting the host against damage. This review systematically outlines the dynamic balance of ROS production and clearance under physiological conditions. We focus on the mechanisms by which ROS regulate cell signaling proteins and how these cell signaling proteins further affect inflammation. Furthermore, we discuss the use of potential and currently available-biomaterials that scavenge ROS, including agents that were engineered to reduce ROS levels by blocking ROS generation, directly chemically reacting with ROS, or catalytically accelerating ROS clearance, in the treatment of inflammatory diseases. Finally, we evaluate the challenges and prospects for the controlled production and material design of ROS scavenging biomaterials.
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Affiliation(s)
- Jiatong Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xiaoyue Han
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Tingyue Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Keyue Tian
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Zhaoping Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Feng Luo
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, 610041, China.
- Department of Prosthodontics, West China School of Stomatology, Sichuan University, No. 14, Section 3, Renmin Nanlu, Chengdu, 610041, China.
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4
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Qin S, Liu JY, Wang XQ, Feng BH, Ren YC, Zheng J, Yu K, Yu H, Li K, Zhu F, Chen M, Fu X, Chen T, Xing ZX, Mei H. ROS-mediated MAPK activation aggravates hyperoxia-induced acute lung injury by promoting apoptosis of type II alveolar epithelial cells via the STAT3/miR-21-5p axis. Mol Immunol 2023; 163:207-215. [PMID: 37839259 DOI: 10.1016/j.molimm.2023.09.016] [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] [Received: 03/30/2023] [Revised: 09/13/2023] [Accepted: 09/28/2023] [Indexed: 10/17/2023]
Abstract
Inhibition of type II alveolar epithelial (AE-II) cell apoptosis is a critical way to cure hyperoxia-induced acute lung injury (HALI). It has been reported that miR-21-5p could reduce H2O2-induced apoptosis in AE-II cells. However, the upstream molecular mechanism remains unclear. Herein, we established a cellular model of HALI by exposing AE-II cells to H2O2 treatment. It was shown that miR-21-5p alleviated H2O2-induced apoptosis in AE-II cells. ROS inhibition decreased apoptosis of H2O2-evoked AE-II cells via increasing miR-21-5p expression. In addition, ROS induced MAPK and STAT3 phosphorylation in H2O2-treated AE-II cells. MAPK inactivation reduces H2O2-triggered AE-II cell apoptosis. MAPK activation inhibits miR-21-5p expression by promoting STAT3 phosphorylation in H2O2-challenged AE-II cells. Furthermore, STAT3 activation eliminated MAPK deactivation-mediated inhibition on the apoptosis of AE-II cells under H2O2 condition. In conclusion, ROS-mediated MAPK activation promoted H2O2-triggered AE-II cell apoptosis by inhibiting miR-21-5p expression via STAT3 phosphorylation, providing novel targets for HALI treatment.
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Affiliation(s)
- Song Qin
- Department of Critical Care Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China
| | - Jun-Ya Liu
- Department of Critical Care Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China
| | - Xiao-Qin Wang
- Department of Pediatric, The second affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China
| | - Bang-Hai Feng
- Department of Critical Care Medicine, Zunyi Hospital of Traditional Chinese Medicine, Zunyi 563000, PR China
| | - Ying-Cong Ren
- Department of Critical Care Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China
| | - Jie Zheng
- Department of Critical Care Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China
| | - Kun Yu
- Department of Critical Care Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China
| | - Hong Yu
- Department of Critical Care Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China
| | - Kang Li
- Department of Critical Care Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China
| | - Feng Zhu
- Department of Respiratory and Critical Care Medicine, The Fifth People's Hospital of Wuxi Affiliated to Jiangnan University, Wuxi 214016, PR China
| | - Miao Chen
- Department of Critical Care Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China
| | - Xiaoyun Fu
- Department of Critical Care Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China
| | - Tao Chen
- Department of Critical Care Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China
| | - Zhou-Xiong Xing
- Department of Critical Care Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China.
| | - Hong Mei
- Department of Critical Care Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, PR China.
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Ivanciuc T, Patrikeev I, Qu Y, Motamedi M, Jones-Hall Y, Casola A, Garofalo RP. Micro-CT Features of Lung Consolidation, Collagen Deposition and Inflammation in Experimental RSV Infection Are Aggravated in the Absence of Nrf2. Viruses 2023; 15:1191. [PMID: 37243277 PMCID: PMC10223011 DOI: 10.3390/v15051191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/15/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
Severe respiratory syncytial virus (RSV) infections in early life have been linked to the development of chronic airway disease. RSV triggers the production of reactive oxygen species (ROS), which contributes to inflammation and enhanced clinical disease. NF-E2-related factor 2 (Nrf2) is an important redox-responsive protein that helps to protect cells and whole organisms from oxidative stress and injury. The role of Nrf2 in the context of viral-mediated chronic lung injury is not known. Herein, we show that RSV experimental infection of adult Nrf2-deficient BALB/c mice (Nrf2-/-; Nrf2 KO) is characterized by enhanced disease, increased inflammatory cell recruitment to the bronchoalveolar compartment and a more robust upregulation of innate and inflammatory genes and proteins, compared to wild-type Nrf2+/+ competent mice (WT). These events that occur at very early time points lead to increased peak RSV replication in Nrf2 KO compared to WT mice (day 5). To evaluate longitudinal changes in the lung architecture, mice were scanned weekly via high-resolution micro-computed tomography (micro-CT) imaging up to 28 days after initial viral inoculation. Based on micro-CT qualitative 2D imaging and quantitative reconstructed histogram-based analysis of lung volume and density, we found that RSV-infected Nrf2 KO mice developed significantly greater and prolonged fibrosis compared to WT mice. The results of this study underscore the critical role of Nrf2-mediated protection from oxidative injury, not only in the acute pathogenesis of RSV infection but also in the long-term consequences of chronic airway injury.
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Affiliation(s)
- Teodora Ivanciuc
- Department of Pediatrics, University of Texas Medical Branch, Galveston, TX 77555, USA; (T.I.); (Y.Q.); (A.C.)
| | - Igor Patrikeev
- Department of Ophthalmology & Visual Sciences, University of Texas Medical Branch, Galveston, TX 77555, USA; (I.P.); (M.M.)
| | - Yue Qu
- Department of Pediatrics, University of Texas Medical Branch, Galveston, TX 77555, USA; (T.I.); (Y.Q.); (A.C.)
| | - Massoud Motamedi
- Department of Ophthalmology & Visual Sciences, University of Texas Medical Branch, Galveston, TX 77555, USA; (I.P.); (M.M.)
- Biomedical Engineering Center, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Yava Jones-Hall
- Department of Veterinary Pathobiology, Texas A&M College of Veterinary Medicine and Biomedical Sciences, College Station, TX 77843, USA;
| | - Antonella Casola
- Department of Pediatrics, University of Texas Medical Branch, Galveston, TX 77555, USA; (T.I.); (Y.Q.); (A.C.)
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
- Sealy Institute for Vaccine Sciences, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Roberto P. Garofalo
- Department of Pediatrics, University of Texas Medical Branch, Galveston, TX 77555, USA; (T.I.); (Y.Q.); (A.C.)
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
- Sealy Institute for Vaccine Sciences, University of Texas Medical Branch, Galveston, TX 77555, USA
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Li YJ, Zhang C, Martincuks A, Herrmann A, Yu H. STAT proteins in cancer: orchestration of metabolism. Nat Rev Cancer 2023; 23:115-134. [PMID: 36596870 DOI: 10.1038/s41568-022-00537-3] [Citation(s) in RCA: 57] [Impact Index Per Article: 57.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/14/2022] [Indexed: 01/04/2023]
Abstract
Reprogrammed metabolism is a hallmark of cancer. However, the metabolic dependency of cancer, from tumour initiation through disease progression and therapy resistance, requires a spectrum of distinct reprogrammed cellular metabolic pathways. These pathways include aerobic glycolysis, oxidative phosphorylation, reactive oxygen species generation, de novo lipid synthesis, fatty acid β-oxidation, amino acid (notably glutamine) metabolism and mitochondrial metabolism. This Review highlights the central roles of signal transducer and activator of transcription (STAT) proteins, notably STAT3, STAT5, STAT6 and STAT1, in orchestrating the highly dynamic metabolism not only of cancer cells but also of immune cells and adipocytes in the tumour microenvironment. STAT proteins are able to shape distinct metabolic processes that regulate tumour progression and therapy resistance by transducing signals from metabolites, cytokines, growth factors and their receptors; defining genetic programmes that regulate a wide range of molecules involved in orchestration of metabolism in cancer and immune cells; and regulating mitochondrial activity at multiple levels, including energy metabolism and lipid-mediated mitochondrial integrity. Given the central role of STAT proteins in regulation of metabolic states, they are potential therapeutic targets for altering metabolic reprogramming in cancer.
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Affiliation(s)
- Yi-Jia Li
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - Chunyan Zhang
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - Antons Martincuks
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - Andreas Herrmann
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
- Sorrento Therapeutics, San Diego, CA, USA
| | - Hua Yu
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA.
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Choi S, Kim EM, Kim SY, Choi Y, Choi S, Cho N, Park HJ, Kim KK. Particulate matter exposure exacerbates cellular damage by increasing stress granule formation in respiratory syncytial virus-infected human lung organoids. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 315:120439. [PMID: 36257563 DOI: 10.1016/j.envpol.2022.120439] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 07/10/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
Exposure to atmospheric particulate matter (PM) increases morbidity and mortality in respiratory diseases by causing various adverse health effects; however, the effects of PM exposure on cellular stress under virus-infected conditions remain unclear. The effects of PM under 10 μm (PM10) and diesel PM (DPM) on respiratory syncytial virus (RSV) infection were investigated in human two-dimensional lung epithelial cells and human three-dimensional lung organoids mimicking the lung tissue. We evaluated the formation of stress granules, which are important in cellular adaptation to various stress conditions. Furthermore, we investigated the effects of repeated exposure to PM10 and DPM on DNA damage and cell death during viral infection. PM10 and DPM did not cause stress granule formation in the absence of RSV infection but drastically increased stress granule formation and signal transduction during RSV infection in human lung epithelial cells and human lung organoids. Further, repeated exposure to PM10 and DPM caused cell death by severely damaging DNA under RSV infection conditions. Thus, PM10 and DPM induce severe lung toxicity under stress conditions, such as viral infection, suggesting that the effects of PMs under various stressful conditions should be examined to accurately predict the lung toxicity of PM.
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Affiliation(s)
- Sunkyung Choi
- Department of Biochemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Eun-Mi Kim
- Department of Predictive Toxicology, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
| | - Seung-Yeon Kim
- Department of Biochemistry, Chungnam National University, Daejeon, 34134, Republic of Korea; Department of Predictive Toxicology, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
| | - Yeongsoo Choi
- Department of Biochemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Seri Choi
- Department of Predictive Toxicology, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
| | - Namjoon Cho
- Department of Biochemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Han-Jin Park
- Department of Predictive Toxicology, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
| | - Kee K Kim
- Department of Biochemistry, Chungnam National University, Daejeon, 34134, Republic of Korea.
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Erdoğan F, Şenkal E, Özer ÖF, İpek İÖ, Altuntaş ŞL, Özde Ş. Oxidative stress in maternal milk and cord blood in gestational diabetes mellitus: a prospective study. SAO PAULO MED J 2022; 140:390-397. [PMID: 35508001 PMCID: PMC9671259 DOI: 10.1590/1516-3180.2021.0209.r1.25082021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 08/27/2021] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Reduced antioxidant defenses may reflect a poor protective response against oxidative stress and this may be implicated in progression of gestational diabetes mellitus (GDM). Oxidative stress induced by hyperglycemia plays a major role in micro and macrovascular complications, which imply endothelial dysfunction. OBJECTIVE Our aim in this study was to investigate the association between GDM and oxidative stress markers measured in plasma, with regard to revealing changes to total antioxidant capacity (TAC) and total oxidant status (TOS) among mothers showing impairments in oral glucose tolerance tests (OGTTs). DESIGN AND SETTING Prospective study at a university hospital in Turkey. METHODS The study group consisted of 50 mothers with GDM, and 59 healthy mothers served as controls. Umbilical cord blood samples were taken from all mothers during delivery and breast milk samples on the fifth day after delivery. TAC, TOS, thiol and disulfide levels were measured. RESULTS No statistically significant relationship between the blood and milk samples could be found. An analysis on correlations between TAC, TOS and certain parameters revealed that there were negative correlations between TOS and total thiol (r = -0.386; P < 0.001) and between TOS and disulfide (r = -0.388; P < 0.001) in milk in the control group. However, these findings were not observed in the study group. CONCLUSION Our findings suggested that a compensatory mechanism of oxidative stress was expected to be present in gestational diabetes mellitus and that this might be ameliorated through good glycemic regulation and antioxidant supplementation.
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Affiliation(s)
- Fırat Erdoğan
- MD. Associate Professor, Department of Pediatrics, School of Medicine, Istanbul Medeniyet University, Istanbul, Turkey.
| | - Evrim Şenkal
- MD. Physician, Department of Pediatrics, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.
| | - Ömer Faruk Özer
- MD. Physician, Department of Biochemistry, School of Medicine, Bezmiâlem Foundation University, Istanbul, Turkey.
| | - İlke Özahi İpek
- MD. Professor, Department of Pediatrics, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.
| | - Şükriye Leyla Altuntaş
- MD. Physician, Department of Obstetrics and Gynecology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.
| | - Şükriye Özde
- MD. Physician, Department of Pediatrics, School of Medicine, Düzce University, Düzce, Turkey.
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9
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Zhang Q, Zhou XM, Wei SZ, Cui DS, Deng KL, Liang G, Luo Y, Luo B, Liang XJ. STAT3 as a target for sensitizing prostate cancer cells to irradiation. JOURNAL OF RADIATION RESEARCH 2022; 63:174-182. [PMID: 34970978 PMCID: PMC8944309 DOI: 10.1093/jrr/rrab117] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Radioresistance of prostate cancer (PCa) is a major factor leading to local failure of radiotherapy. STAT3 is an oncogenic protein that was recently found to be activated in PCa tumors. This study aimed to investigate the radiosensitization effect of targeting STAT3 in PCa tumors. Here, the radiosensitization effect of STAT3 blockade was investigated by clonogenic assay, flow cytometry and western blot analysis in human PCa cells in vitro and in vivo. We demonstrated that STAT3 blockade with a STAT3 inhibitor or siRNA increased the radiosensitivity of PCa cells and that radiation together with STAT3 blockade induced more apoptosis and double-strand breaks (DSBs) than radiation alone in LNCaP cells. In addition, radiation induced STAT3 activation and survivin expression in PCa cells, which was inhibited by STAT3 blockade. Transfection with survivin cDNA attenuated the radiosensitization effect of STAT3 blockade. These effects were further confirmed by in vivo studies, which showed that the STAT3 inhibitor enhanced the treatment efficacy of radiation on LNCaP xenografts with decreased STAT3 activation and survivin expression. These findings suggest that STAT3 blockade radiosensitizes PCa cells through regulation of survivin. Thus, our study has revealed STAT3 as a potential sensitizer for irradiation in PCa cells. Its clinical application as an adjuvant in radiotherapy of PCa should be explored in the future.
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Affiliation(s)
| | | | - Shao-Zhong Wei
- Department of Urology Surgery, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dian-Sheng Cui
- Department of Urology Surgery, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kang-Li Deng
- Department of Urology Surgery, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Gai Liang
- Department of Radiotherapy Center, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yan Luo
- Department of Radiotherapy Center, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bo Luo
- Corresponding author. No. 116 Zhuodaoquan South Road, Wuhan, Hubei Province, 430000, People’s Republic of China. Telephone: 86-27-87287963;
| | - Xin-Jun Liang
- Department of Abdominal Oncology, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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10
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Rayavara K, Kurosky A, Hosakote YM. Respiratory syncytial virus infection induces the release of transglutaminase 2 from human airway epithelial cells. Am J Physiol Lung Cell Mol Physiol 2022; 322:L1-L12. [PMID: 34704843 PMCID: PMC8721898 DOI: 10.1152/ajplung.00013.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Respiratory syncytial virus (RSV) is an important human pathogen that causes severe lower respiratory tract infections in young children, the elderly, and the immunocompromised, yet no effective treatments or vaccines are available. The precise mechanism underlying RSV-induced acute airway disease and associated sequelae are not fully understood; however, early lung inflammatory and immune events are thought to play a major role in the outcome of the disease. Moreover, oxidative stress responses in the airways play a key role in the pathogenesis of RSV. Oxidative stress has been shown to elevate cytosolic calcium (Ca2+) levels, which in turn activate Ca2+-dependent enzymes, including transglutaminase 2 (TG2). Transglutaminase 2 is a multifunctional cross-linking enzyme implicated in various physiological and pathological conditions; however, its involvement in respiratory virus-induced airway inflammation is largely unknown. In this study, we demonstrated that RSV-induced oxidative stress promotes enhanced activation and release of TG2 from human lung epithelial cells as a result of its translocation from the cytoplasm and subsequent release into the extracellular space, which was mediated by Toll-like receptor (TLR)-4 and NF-κB pathways. Antioxidant treatment significantly inhibited RSV-induced TG2 extracellular release and activation via blocking viral replication. Also, treatment of RSV-infected lung epithelial cells with TG2 inhibitor significantly reduced RSV-induced matrix metalloprotease activities. These results suggested that RSV-induced oxidative stress activates innate immune receptors in the airways, such as TLRs, that can activate TG2 via the NF-κB pathway to promote cross-linking of extracellular matrix proteins, resulting in enhanced inflammation.
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Affiliation(s)
- Kempaiah Rayavara
- 1Department of Microbiology and Immunology, The University of Texas Medical Branch, Galveston, Texas
| | - Alexander Kurosky
- 2Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas
| | - Yashoda M. Hosakote
- 1Department of Microbiology and Immunology, The University of Texas Medical Branch, Galveston, Texas
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11
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Yang C, Wang Y, Sims MM, He Y, Miller DD, Pfeffer LM. Targeting the Bromodomain of BRG-1/BRM Subunit of the SWI/SNF Complex Increases the Anticancer Activity of Temozolomide in Glioblastoma. Pharmaceuticals (Basel) 2021; 14:ph14090904. [PMID: 34577604 PMCID: PMC8467157 DOI: 10.3390/ph14090904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 09/02/2021] [Accepted: 09/03/2021] [Indexed: 11/16/2022] Open
Abstract
Glioblastoma (GBM) is a deadly and incurable brain cancer with limited therapeutic options. PFI-3 is a small-molecule bromodomain (BRD) inhibitor of the BRM/BRG1 subunits of the SWI/SNF chromatin remodeling complex. The objective of this study is to determine the efficacy of PFI-3 as a potential GBM therapy. We report that PFI-3 binds to these BRDs when expressed in GBM cells. PFI-3 markedly enhanced the antiproliferative and cell death-inducing effects of temozolomide (TMZ) in TMZ-sensitive GBM cells as well as overcame the chemoresistance of highly TMZ-resistant GBM cells. PFI-3 also altered gene expression in GBM and enhanced the basal and interferon-induced expression of a subset of interferon-responsive genes. Besides the effects of PFI-3 on GBM cells in vitro, we found that PFI-3 markedly potentiated the anticancer effect of TMZ in an intracranial GBM animal model, resulting in a marked increase in survival of animals bearing GBM tumors. Taken together, we identified the BRG1 and BRM subunits of SWI/SNF as novel targets in GBM and revealed the therapeutic potential of applying small molecule inhibitors of SWI/SNF to improve the clinical outcome in GBM using standard-of-care chemotherapy.
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Affiliation(s)
- Chuanhe Yang
- Department of Pathology and Laboratory Medicine, Center for Cancer Research, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA; (C.Y.); (Y.W.); (M.M.S.)
| | - Yinan Wang
- Department of Pathology and Laboratory Medicine, Center for Cancer Research, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA; (C.Y.); (Y.W.); (M.M.S.)
| | - Michelle M. Sims
- Department of Pathology and Laboratory Medicine, Center for Cancer Research, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA; (C.Y.); (Y.W.); (M.M.S.)
| | - Yali He
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, TN 38163, USA; (Y.H.); (D.D.M.)
| | - Duane D. Miller
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, TN 38163, USA; (Y.H.); (D.D.M.)
| | - Lawrence M. Pfeffer
- Department of Pathology and Laboratory Medicine, Center for Cancer Research, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA; (C.Y.); (Y.W.); (M.M.S.)
- Correspondence:
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12
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Ding X, Li S, Zhu L. Potential effects of HMGB1 on viral replication and virus infection-induced inflammatory responses: A promising therapeutic target for virus infection-induced inflammatory diseases. Cytokine Growth Factor Rev 2021; 62:54-61. [PMID: 34503914 DOI: 10.1016/j.cytogfr.2021.08.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/26/2021] [Accepted: 08/26/2021] [Indexed: 12/20/2022]
Abstract
Inflammatory responses, characterized by the overproduction of numerous proinflammatory mediators by immune cells, is essential to protect the host against invading pathogens. Excessive production of proinflammatory cytokines is a key pathogenic factor accounting for severe tissue injury and disease progression during the infection of multiple viruses, which are therefore termed as "cytokine storm". High mobility group box 1 (HMGB1), a ubiquitous DNA-binding protein released either over virus-infected cells or activated immune cells, may act as a proinflammatory cytokine with a robust capacity to potentiate inflammatory response and disease severity. Moreover, HMGB1 is a host factor that potentially participates in the regulation of viral replication cycles with complicated mechanisms. Currently, HMGB1 is regarded as a promising therapeutic target against virus infection. Here, we provide an overview of the updated studies on how HMGB1 is differentially manipulated by distinct viruses to regulate viral diseases.
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Affiliation(s)
- Xiuyan Ding
- College of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China; College of Veterinary Medicine, Yangzhou University and Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu 225009, China
| | - Shitao Li
- Department of Microbiology and Immunology, Tulane University, New Orleans, LA 70118, USA
| | - Liqian Zhu
- College of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China; College of Veterinary Medicine, Yangzhou University and Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu 225009, China.
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13
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Delgado-Enciso I, Paz-Garcia J, Barajas-Saucedo CE, Mokay-Ramírez KA, Meza-Robles C, Lopez-Flores R, Delgado-Machuca M, Murillo-Zamora E, Toscano-Velazquez JA, Delgado-Enciso J, Melnikov V, Walle-Guillen M, Galvan-Salazar HR, Delgado-Enciso OG, Cabrera-Licona A, Danielewicz-Mata EJ, Mandujano-Diaz PJ, Guzman-Esquivel J, Montes-Galindo DA, Perez-Martinez H, Jimenez-Villegaz JM, Hernandez-Rangel AE, Montes-Diaz P, Rodriguez-Sanchez IP, Martinez-Fierro ML, Garza-Veloz I, Tiburcio-Jimenez D, Zaizar-Fregoso SA, Gonzalez-Alcaraz F, Gutierrez-Gutierrez L, Diaz-Lopez L, Ramirez-Flores M, Guzman-Solorzano HP, Gaytan-Sandoval G, Martinez-Perez CR, Espinoza-Gómez F, Rojas-Larios F, Hirsch-Meillon MJ, Baltazar-Rodriguez LM, Barrios-Navarro E, Oviedo-Rodriguez V, Mendoza-Hernandez MA, Prieto-Diaz-Chavez E, Paz-Michel BA. Safety and efficacy of a COVID-19 treatment with nebulized and/or intravenous neutral electrolyzed saline combined with usual medical care vs. usual medical care alone: A randomized, open-label, controlled trial. Exp Ther Med 2021; 22:915. [PMID: 34306189 PMCID: PMC8281484 DOI: 10.3892/etm.2021.10347] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 05/11/2021] [Indexed: 12/13/2022] Open
Abstract
Coronavirus disease 2019 (COVID-19) is currently the major public health problem worldwide. Neutral electrolyzed saline solution that contains reactive chlorine and oxygen species may be an effective therapeutic. In the present study, the treatment efficacy of intravenous and/or nebulized neutral electrolyzed saline combined with usual medical care vs. usual medical care alone was evaluated in ambulatory patients with COVID-19. A prospective, 2-arm, parallel-group, randomized, open-label, multi-center, phase I-II clinical trial including 214 patients was performed. The following two outcomes were evaluated during the 20-day follow-up: i) The number of patients with disease progression; and ii) the patient acceptable symptom state. Serial severe acute respiratory syndrome coronavirus 2 naso/oro-pharyngeal detection by reverse transcription-quantitative (RT-q) PCR was performed in certain patients of the experimental group. Biochemical and hematologic parameters, as well as adverse effects, were also evaluated in the experimental group. The experimental treatment decreased the risk of hospitalization by 89% [adjusted relative risk (RR)=0.11, 95% confidence interval (CI): 0.03-0.37, P<0.001] and the risk of death by 96% (adjusted RR=0.04, 95% CI: 0.01-0.42, P=0.007) and also resulted in an 18-fold higher probability of achieving an acceptable symptom state on day 5 (adjusted RR=18.14, 95% CI: 7.29-45.09, P<0.001), compared with usual medical care alone. Overall, neutral electrolyzed saline solution was better than usual medical care alone. Of the patients analyzed, >50% were negative for the virus as detected by RT-qPCR in naso/oro-pharyngeal samples on day 4, with only a small number of positive patients on day 6. Clinical improvement correlated with a decrease in C-reactive protein, aberrant monocytes and increased lymphocytes and platelets. Cortisol and testosterone levels were also evaluated and a decrease in cortisol levels and an increase in the testosterone-cortisol ratio were observed on days 2 and 4. The experimental treatment produced no serious adverse effects. In conclusion, neutral electrolyzed saline solution markedly reduced the symptomatology and risk of progression in ambulatory patients with COVID-19. The present clinical trial was registered in the Cuban public registry of clinical trials (RPCEC) database (May 5, 2020; no. TX-COVID19: RPCEC00000309).
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Affiliation(s)
- Ivan Delgado-Enciso
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México.,Department of Research, Cancerology State Institute, Colima State Health Services, Colima 28085, México
| | - Juan Paz-Garcia
- Department of Internal Medicine and Surgery, Union Hospital Center, Villa de Álvarez, Colima 28970, México
| | - Carlos E Barajas-Saucedo
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México
| | - Karen A Mokay-Ramírez
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México
| | - Carmen Meza-Robles
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México.,Department of Research, Cancerology State Institute, Colima State Health Services, Colima 28085, México
| | - Rodrigo Lopez-Flores
- Department of Research, Cancerology State Institute, Colima State Health Services, Colima 28085, México
| | - Marina Delgado-Machuca
- Department of Research, Cancerology State Institute, Colima State Health Services, Colima 28085, México
| | - Efren Murillo-Zamora
- Department of Research, General Hospital of Zone No. 1 and Family Medicine Unit No. 19 IMSS, Villa de Alvarez, Colima 28984, México
| | - Jose A Toscano-Velazquez
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México
| | - Josuel Delgado-Enciso
- Department of Research, Foundation for Cancer Ethics, Education and Research of the Cancerology State Institute, Colima 28085, México
| | - Valery Melnikov
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México
| | - Mireya Walle-Guillen
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México.,Department of Research, Cancerology State Institute, Colima State Health Services, Colima 28085, México
| | - Hector R Galvan-Salazar
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México.,Department of Research, Cancerology State Institute, Colima State Health Services, Colima 28085, México
| | - Osiris G Delgado-Enciso
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México.,Department of Research, Foundation for Cancer Ethics, Education and Research of the Cancerology State Institute, Colima 28085, México
| | | | | | - Pablo J Mandujano-Diaz
- COVID-19 Respiratory Care Clinic INSABI Poliforum, Tuxtla Gutierrez, Chiapas 29040, México
| | - José Guzman-Esquivel
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México.,Department of Research, Foundation for Cancer Ethics, Education and Research of the Cancerology State Institute, Colima 28085, México
| | - Daniel A Montes-Galindo
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México.,Department of Research, Cancerology State Institute, Colima State Health Services, Colima 28085, México
| | - Henry Perez-Martinez
- COVID-19 Respiratory Care Clinic INSABI Poliforum, Tuxtla Gutierrez, Chiapas 29040, México
| | | | | | | | - Iram P Rodriguez-Sanchez
- Laboratory of Molecular and Structural Physiology, School of Biological Sciences, Universidad Autónoma de Nuevo León, San Nicolas de los Garza, Nuevo León 66455, México
| | - Margarita L Martinez-Fierro
- Molecular Medicine Laboratory, Academic Unit of Human Medicine and Health Sciences, Autonomous University of Zacatecas, Zacatecas 98160, México
| | - Idalia Garza-Veloz
- Molecular Medicine Laboratory, Academic Unit of Human Medicine and Health Sciences, Autonomous University of Zacatecas, Zacatecas 98160, México
| | - Daniel Tiburcio-Jimenez
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México
| | - Sergio A Zaizar-Fregoso
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México
| | | | | | - Luciano Diaz-Lopez
- COVID-19 Respiratory Care Clinic INSABI Poliforum, Tuxtla Gutierrez, Chiapas 29040, México
| | - Mario Ramirez-Flores
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México
| | | | - Gustavo Gaytan-Sandoval
- Department of Research, Cancerology State Institute, Colima State Health Services, Colima 28085, México
| | - Carlos R Martinez-Perez
- Department of Research, Cancerology State Institute, Colima State Health Services, Colima 28085, México
| | - Francisco Espinoza-Gómez
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México
| | - Fabián Rojas-Larios
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México
| | - Michael J Hirsch-Meillon
- Department of Research, Cancerology State Institute, Colima State Health Services, Colima 28085, México
| | - Luz M Baltazar-Rodriguez
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México
| | - Enrique Barrios-Navarro
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México
| | - Vladimir Oviedo-Rodriguez
- Department of Research, Cancerology State Institute, Colima State Health Services, Colima 28085, México
| | | | | | - Brenda A Paz-Michel
- Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, México.,Department of Research, Esteripharma S.A. de C.V., Ciudad de México 03100, México
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14
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Narayanan S, Elesela S, Rasky AJ, Morris SH, Kumar S, Lombard D, Lukacs NW. ER stress protein PERK promotes inappropriate innate immune responses and pathogenesis during RSV infection. J Leukoc Biol 2021; 111:379-389. [PMID: 33866604 DOI: 10.1002/jlb.3a0520-322rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The activation of dendritic cells (DC) during respiratory viral infections is central to directing the immune response and the pathologic outcome. In these studies, the effect of RSV infection on development of ER stress responses and the impact on innate immunity was examined. The upregulation of ER stress was closely associated with the PERK pathway through the upregulation of CHOP in RSV infected DC. The inhibition of PERK corresponded with decreased EIF2a phosphorylation but had no significant effect on Nrf2 in DC, two primary pathways regulated by PERK. Subsequent studies identified that by blocking PERK activity in infected DC an altered ER stress response and innate cytokine profile was observed with the upregulation of IFNβ and IL-12, coincident to the down regulation of IL-1β. When mitochondria respiration was assessed in PERK deficient DC there were increased dysfunctional mitochondria after RSV infection that resulted in reduced oxygen consumption rates (OCR) and ATP production indicating altered cellular metabolism. Use of a CD11c targeted genetic deleted murine model, RSV infection was characterized by reduced inflammation and diminished mucus staining as well as reduced mucus-associated gene gob5 expression. The assessment of the cytokine responses showed decreased IL-13 and IL-17 along with diminished IL-1β in the lungs of PERK deficient infected mice. When PERK-deficient animals were assessed in parallel for lung leukocyte numbers, animals displayed significantly reduced myeloid and activated CD4 and CD8 T cell numbers. Thus, the PERK activation pathway may provide a rational target for altering the severe outcome of an RSV infection through modifying immune responses.
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Affiliation(s)
- Samanthi Narayanan
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Srikanth Elesela
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA.,Mary H. Weiser Food Allergy Center, University of Michigan, Ann Arbor, Michigan, USA
| | - Andrew J Rasky
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Susan H Morris
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Surinder Kumar
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - David Lombard
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Nicholas W Lukacs
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA.,Mary H. Weiser Food Allergy Center, University of Michigan, Ann Arbor, Michigan, USA
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15
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Chattopadhyay P, Srinivasa Vasudevan J, Pandey R. Noncoding RNAs: modulators and modulatable players during infection-induced stress response. Brief Funct Genomics 2021; 20:28-41. [PMID: 33491070 PMCID: PMC7929421 DOI: 10.1093/bfgp/elaa026] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 12/09/2020] [Accepted: 12/11/2020] [Indexed: 12/16/2022] Open
Abstract
The human genome has an almost equal distribution of unique and transposable genetic elements. Although at the transcriptome level, a relatively higher contribution from transposable elements derived RNA has been reported. This is further highlighted with evidence from pervasive transcription. Of the total RNA, noncoding RNAs (ncRNAs) are significant contributors to the transcriptome pool with sizeable fraction from repetitive elements of the human genome, inclusive of Long Interspersed Nuclear Elements (LINEs) and Short Interspersed Nuclear Elements (SINEs). ncRNAs are increasingly being implicated in diverse functional roles especially during conditions of stress. These stress responses are driven through diverse mediators, inclusive of long and short ncRNAs. ncRNAs such as MALAT1, GAS5, miR-204 and miR-199a-5p have been functionally involved during oxidative stress, endoplasmic reticulum (ER) stress and unfolded protein response (UPR). Also, within SINEs, Alu RNAs derived from primate-specific Alu repeats with ~11% human genome contribution, playing a significant role. Pathogenic diseases, including the recent COVID-19, leads to differential regulation of ncRNAs. Although, limited evidence suggests the need for an inquest into the role of ncRNAs in determining the host response towards pathogen challenge.
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Affiliation(s)
| | | | - Rajesh Pandey
- Corresponding author: Rajesh Pandey, INtegrative GENomics of HOst-PathogEn (INGEN-HOPE) laboratory. CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), North Campus, Near Jubilee Hall, Mall Road, Delhi-110007, India. Tel.: +91 9811029551; E-mail:
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16
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Shilovskiy IP, Yumashev KV, Nikolsky AA, Vishnyakova LI, Khaitov MR. Molecular and Cellular Mechanisms of Respiratory Syncytial Viral Infection: Using Murine Models to Understand Human Pathology. BIOCHEMISTRY. BIOKHIMIIA 2021; 86:290-306. [PMID: 33838630 PMCID: PMC7957450 DOI: 10.1134/s0006297921030068] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/18/2020] [Accepted: 10/18/2020] [Indexed: 12/28/2022]
Abstract
Respiratory syncytial virus (RSV) causes severe pathology of the lower respiratory tract in infants, immunocompromised people, and elderly. Despite decades of research, there is no licensed vaccine against RSV, and many therapeutic drugs are still under development. Detailed understanding of molecular and cellular mechanisms of the RSV infection pathology can accelerate the development of efficacious treatment. Current studies on the RSV pathogenesis are based on the analysis of biopsies from the infected patients; however deeper understanding of molecular and cellular mechanisms of the RSV pathology could be achieved using animal models. Mice are the most often used model for RSV infection because they exhibit manifestations similar to those observed in humans (bronchial obstruction, mucous hypersecretion, and pulmonary inflammation mediated by lymphocytes, macrophages, and neutrophils). Additionally, the use of mice is economically feasible, and many molecular tools are available for studying RSV infection pathogenesis at the molecular and cellular levels. This review summarizes new data on the pathogenesis of RSV infection obtained in mouse models, which demonstrated the role of T cells in both the antiviral defense and the development of lung immunopathology. T cells not only eliminate the infected cells, but also produce significant amounts of the proinflammatory cytokines TNFα and IFNγ. Recently, a new subset of tissue-resident memory T cells (TRM) was identified that provide a strong antiviral defense without induction of lung immunopathology. These cells accumulate in the lungs after local rather than systemic administration of RSV antigens, which suggests new approaches to vaccination. The studies in mouse models have revealed a minor role of interferons in the anti-RSV protection, as RSV possesses mechanisms to escape the antiviral action of type I and III interferons, which may explain the low efficacy of interferon-containing drugs. Using knockout mice, a significant breakthrough has been achieved in understanding the role of many pro-inflammatory cytokines in lung immunopathology. It was found that in addition to TNFα and IFNγ, the cytokines IL-4, IL-5, IL-13, IL-17A, IL-33, and TSLP mediate the major manifestations of the RSV pathogenesis, such as bronchial obstruction, mucus hyperproduction, and lung infiltration by pro-inflammatory cells, while IL-6, IL-10, and IL-27 exhibit the anti-inflammatory effect. Despite significant differences between the mouse and human immune systems, mouse models have made a significant contribution to the understanding of molecular and cellular mechanisms of the pathology of human RSV infection.
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Affiliation(s)
- Igor P Shilovskiy
- National Research Center, Institute of Immunology, Federal Medico-Biological Agency, Moscow, 115522, Russia.
| | - Kirill V Yumashev
- National Research Center, Institute of Immunology, Federal Medico-Biological Agency, Moscow, 115522, Russia
| | - Alexandr A Nikolsky
- National Research Center, Institute of Immunology, Federal Medico-Biological Agency, Moscow, 115522, Russia
| | - Liudmila I Vishnyakova
- National Research Center, Institute of Immunology, Federal Medico-Biological Agency, Moscow, 115522, Russia
| | - Musa R Khaitov
- National Research Center, Institute of Immunology, Federal Medico-Biological Agency, Moscow, 115522, Russia
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17
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Xie N, Zhang L, Gao W, Huang C, Huber PE, Zhou X, Li C, Shen G, Zou B. NAD + metabolism: pathophysiologic mechanisms and therapeutic potential. Signal Transduct Target Ther 2020; 5:227. [PMID: 33028824 PMCID: PMC7539288 DOI: 10.1038/s41392-020-00311-7] [Citation(s) in RCA: 358] [Impact Index Per Article: 89.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 08/04/2020] [Accepted: 08/20/2020] [Indexed: 02/06/2023] Open
Abstract
Nicotinamide adenine dinucleotide (NAD+) and its metabolites function as critical regulators to maintain physiologic processes, enabling the plastic cells to adapt to environmental changes including nutrient perturbation, genotoxic factors, circadian disorder, infection, inflammation and xenobiotics. These effects are mainly achieved by the driving effect of NAD+ on metabolic pathways as enzyme cofactors transferring hydrogen in oxidation-reduction reactions. Besides, multiple NAD+-dependent enzymes are involved in physiology either by post-synthesis chemical modification of DNA, RNA and proteins, or releasing second messenger cyclic ADP-ribose (cADPR) and NAADP+. Prolonged disequilibrium of NAD+ metabolism disturbs the physiological functions, resulting in diseases including metabolic diseases, cancer, aging and neurodegeneration disorder. In this review, we summarize recent advances in our understanding of the molecular mechanisms of NAD+-regulated physiological responses to stresses, the contribution of NAD+ deficiency to various diseases via manipulating cellular communication networks and the potential new avenues for therapeutic intervention.
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Affiliation(s)
- Na Xie
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, 610041, China
| | - Lu Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and Collaborative Innovation Center for Biotherapy, Chengdu, 610041, China
| | - Wei Gao
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, 610041, China
| | - Canhua Huang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, 610041, China
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, 611137, China
| | - Peter Ernst Huber
- CCU Molecular and Radiation Oncology, German Cancer Research Center; Department of Radiation Oncology, Heidelberg University Hospital, Heidelberg, Germany
| | - Xiaobo Zhou
- First Department of Medicine, Medical Faculty Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Changlong Li
- West China School of Basic Medical Sciences & Forensic Medicine, West China Hospital, Sichuan University, Chengdu, 610041, China.
| | - Guobo Shen
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and Collaborative Innovation Center for Biotherapy, Chengdu, 610041, China.
| | - Bingwen Zou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, 610041, China.
- CCU Molecular and Radiation Oncology, German Cancer Research Center; Department of Radiation Oncology, Heidelberg University Hospital, Heidelberg, Germany.
- Department of Thoracic Oncology and Department of Radiation Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China.
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18
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Melatonin potentials against viral infections including COVID-19: Current evidence and new findings. Virus Res 2020; 287:198108. [PMID: 32768490 PMCID: PMC7405774 DOI: 10.1016/j.virusres.2020.198108] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 12/14/2022]
Abstract
Viral infections are dangerous diseases for human health worldwide, which lead to significant morbidity and mortality each year. Because of their importance and the lack of effective therapeutic approaches, further attempts should be made to discover appropriate alternative or complementary treatments. Melatonin, a multifunctional neurohormone mainly synthesized and secreted by the pineal gland, plays some roles in the treatment of viral infections. Regarding a deadly outbreak of COVID-19 across the world, we decided to discuss melatonin functions against various viral infections including COVID-19. Therefore, in this review, we summarize current evidence on melatonin therapy for viral infections with focus on possible underlying mechanisms of melatonin actions.
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Cecchini R, Cecchini AL. SARS-CoV-2 infection pathogenesis is related to oxidative stress as a response to aggression. Med Hypotheses 2020; 143:110102. [PMID: 32721799 PMCID: PMC7357498 DOI: 10.1016/j.mehy.2020.110102] [Citation(s) in RCA: 229] [Impact Index Per Article: 57.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/04/2020] [Accepted: 07/10/2020] [Indexed: 12/11/2022]
Abstract
Since the WHO declared COVID-19 a pandemic, a great effort has been made to understand this serious disease. Thousands of studies are being devoted to understanding its epidemiology, its molecular characteristics, its mechanisms, and the clinical evolution of this viral infection. However, little has been published on its pathogenesis and the host response mechanisms in the progress of the disease. Therefore, we propose a hypothesis based on strong scientific documentation, associating oxidative stress with changes found in patients with COVID-19, such as its participation in the amplification and perpetuation of the cytokine storm, coagulopathy, and cell hypoxia. Finally, we suggest a therapeutic strategy to reduce oxidative stress using antioxidants, NF-κB inhibitors, Nrf2 activators, and iron complexing agents. We believe that this hypothesis can guide new studies and therapeutic strategies on this topic.
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Affiliation(s)
- Rubens Cecchini
- Laboratory of Pathophysiology and Free Radicals, Department of Pathological Sciences, State University of Londrina, UEL, Londrina, PR, Brazil
| | - Alessandra Lourenço Cecchini
- Laboratory of Molecular Pathology, Department of Pathological Sciences, State University of Londrina, UEL, Londrina, PR, Brazil.
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20
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Pathak G, Singh S, Kumari P, Raza W, Hussain Y, Meena A. Cirsimaritin, a lung squamous carcinoma cells (NCIH-520) proliferation inhibitor. J Biomol Struct Dyn 2020; 39:3312-3323. [PMID: 32362196 DOI: 10.1080/07391102.2020.1763198] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Cirsimaritin is a dimethoxy flavone, which is present in Ocimum sanctum, Microtea debilis, Artemisia judaica, Cirsium japonicum, and Lithocarpus dealbatus. Its antiproliferative potential has been explored in breast and gall bladder cancer cell lines. However, no reports are available on skin and squamous lung carcinoma. Also, the complete mode of action is unknown. Therefore, in the present study, the anticancer potential of cirsimaritin is explored in organ-specific cell lines by using MTT assay. Further, the inhibitory potential and binding interaction with the selected targets were analyzed through in vitro and in-silico analysis. Cirsimaritin showed selective anticancer activity against NCIH-520 cell-line (IC50 23.29 µM), also inhibited the proliferation of other cell-lines up to 48% at 100 µM. In NCIH-520 cell-line, cirsimaritin significantly increased the apoptosis of the cells at both the tested concentrations (10 and 100 µM), which was confirmed by Annexin-V signifying the induction of late apoptosis. Besides, an increase in the ROS levels of 1.6 fold (10 µM) and 1.8 fold (100 µM), circimaritin also inhibits the activity of ODC and CATD with the IC50 57.30 and 68.22 µM respectively. It exhibited a good binding score with the selected targets, follow Lipinski's rule of five and non-mutagenic. Hence, cirsimaritin is a potent molecule, which inhibits the proliferation of lung squamous cell lines by inducing apoptosis. It also inhibited the activity of ODC and CATD responsible for the progression phase in the cancer cells. Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Gauri Pathak
- Molecular Bioprospection Department, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Shilpi Singh
- Molecular Bioprospection Department, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Priyanka Kumari
- Molecular Bioprospection Department, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Waseem Raza
- Molecular Bioprospection Department, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India.,Jawaharlal Nehru University, New Delhi, India
| | - Yusuf Hussain
- Molecular Bioprospection Department, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Abha Meena
- Molecular Bioprospection Department, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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21
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Ansar M, Ivanciuc T, Garofalo RP, Casola A. Increased Lung Catalase Activity Confers Protection Against Experimental RSV Infection. Sci Rep 2020; 10:3653. [PMID: 32107411 PMCID: PMC7046725 DOI: 10.1038/s41598-020-60443-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 02/11/2020] [Indexed: 11/25/2022] Open
Abstract
Respiratory syncytial virus (RSV) infection in mouse and human lung is associated with oxidative injury and pathogenic inflammation. RSV impairs antioxidant responses by increasing the degradation of transcription factor NRF2, which controls the expression of several antioxidant enzyme (AOE) genes, including catalase. Since catalase is a key enzyme for the dismutation of virus-mediated generation of hydrogen peroxide (H2O2) we developed a model of intranasal supplementation of polyethylene glycol-conjugated catalase (PG-CAT) for RSV-infected mice. The results of our study show that PG-CAT supplementation was able to increase specific enzymatic activity along with reduction in H2O2 in the airways and had a significant protective effect against RSV-induced clinical disease and airway pathology. PG-CAT treated mice showed amelioration in airway obstruction, reduction in neutrophil elastase and inflammation. Improved airway hyperresponsiveness was also observed in mice that received PG-CAT as a treatment post-viral inoculation. In addition, PG-CAT greatly reduced the concentration of inflammatory cytokines and chemokines, including IL-1, TNF-α, IL-9, CXCL1, CCL2, and CCL5 in the bronchoalveolar lavage fluid of RSV-infected mice, without increasing viral replication in the lung. In conclusion, catalase supplementation may represent a novel pharmacologic approach to be explored in human for prevention or treatment of respiratory infections caused by RSV.
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Affiliation(s)
- Maria Ansar
- University of Texas Medical Branch, Department of Microbiology and Immunology Galveston, Galveston, TX, 77555, USA
| | - Teodora Ivanciuc
- University of Texas Medical Branch, Department of Pediatrics, Galveston, TX, 77555, USA
| | - Roberto P Garofalo
- University of Texas Medical Branch, Department of Microbiology and Immunology Galveston, Galveston, TX, 77555, USA
- University of Texas Medical Branch, Department of Pediatrics, Galveston, TX, 77555, USA
- University of Texas Medical Branch, Institute for Human Infections and Immunity, Galveston, TX, 77555, USA
| | - Antonella Casola
- University of Texas Medical Branch, Department of Microbiology and Immunology Galveston, Galveston, TX, 77555, USA.
- University of Texas Medical Branch, Department of Pediatrics, Galveston, TX, 77555, USA.
- University of Texas Medical Branch, Institute for Human Infections and Immunity, Galveston, TX, 77555, USA.
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22
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Chambliss JM, Ansar M, Kelley JP, Spratt H, Garofalo RP, Casola A. A Polymorphism in the Catalase Gene Promoter Confers Protection against Severe RSV Bronchiolitis. Viruses 2020; 12:E57. [PMID: 31947722 PMCID: PMC7019864 DOI: 10.3390/v12010057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 12/20/2019] [Accepted: 12/28/2019] [Indexed: 02/07/2023] Open
Abstract
Respiratory syncytial virus (RSV) infection is associated with oxidative lung injury, decreased levels of antioxidant enzymes (AOEs), and the degradation of the transcription factor NF-E2-related factor 2 (NRF2), a master regulator of AOE expression. Single nucleotide polymorphisms (SNPs) in AOE and NRF2 genes have been associated with various lung disorders. To test whether specific NRF2 and/or AOE gene SNPs in children with RSV lower respiratory tract infection were associated with disease severity, one hundred and forty one children <24 month of age with bronchiolitis were assessed for seven AOE and two NRF2 SNPs, and data were correlated with disease severity, which was determined by need of oxygen supplementation and intensive care support. One SNP in the promoter region of the catalase gene, rs1001179, which is associated with higher enzyme expression, was significantly underrepresented (p = 0.01, OR 0.38) among patients with moderate to severe RSV bronchiolitis, suggesting a protective effect against disease severity. Our results suggest that increasing catalase expression/activity could exert a protective role in the context of RSV infection and represent a potential novel therapeutic target to ameliorate viral-induced lung disease.
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Affiliation(s)
- Jeffrey M. Chambliss
- Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX 75390, USA;
| | - Maria Ansar
- Department of Microbiology and Immunology, The University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA; (M.A.); (R.P.G.)
| | - John P. Kelley
- Southwest Asthma and Allergy Associates, Houston, TX 77074, USA;
| | - Heidi Spratt
- Department of Preventative Medicine and Community Health, The University of Texas Medical Branch at Galveston, Galveston, TX 77555 USA;
| | - Roberto P. Garofalo
- Department of Microbiology and Immunology, The University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA; (M.A.); (R.P.G.)
- Department of Pediatrics, The University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Antonella Casola
- Department of Microbiology and Immunology, The University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA; (M.A.); (R.P.G.)
- Department of Pediatrics, The University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
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23
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SOCS1-Derived Peptide Administered by Eye Drops Prevents Retinal Neuroinflammation and Vascular Leakage in Experimental Diabetes. Int J Mol Sci 2019; 20:ijms20153615. [PMID: 31344857 PMCID: PMC6695852 DOI: 10.3390/ijms20153615] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 07/18/2019] [Accepted: 07/22/2019] [Indexed: 01/13/2023] Open
Abstract
Current treatments for diabetic retinopathy (DR) target late stages when vision has already been significantly affected. Accumulating evidence suggests that neuroinflammation plays a major role in the pathogenesis of DR, resulting in the disruption of the blood-retinal barrier. Suppressors of cytokine signaling (SOCS) are cytokine-inducible proteins that function as a negative feedback loop regulating cytokine responses. On this basis, the aim of the present study was to evaluate the effect of a SOCS1-derived peptide administered by eye drops (2 weeks) on retinal neuroinflammation and early microvascular abnormalities in a db/db mouse model. In brief, we found that SOCS1-derived peptide significantly reduced glial activation and neural apoptosis induced by diabetes, as well as retinal levels of proinflammatory cytokines. Moreover, a significant improvement of electroretinogram parameters was observed, thus revealing a clear impact of the histological findings on global retinal function. Finally, SOCS1-derived peptide prevented the disruption of the blood-retinal barrier. Overall, our results suggest that topical administration of SOCS1-derived peptide is effective in preventing retinal neuroinflammation and early microvascular impairment. These findings could open up a new strategy for the treatment of early stages of DR.
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24
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Natarajan K, Meganathan V, Mitchell C, Boggaram V. Organic dust induces inflammatory gene expression in lung epithelial cells via ROS-dependent STAT-3 activation. Am J Physiol Lung Cell Mol Physiol 2019; 317:L127-L140. [PMID: 31042082 DOI: 10.1152/ajplung.00448.2018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Exposure to dust in agricultural and animal environments, known as organic dust, is associated with the development of respiratory symptoms and respiratory diseases. Inflammation is a key feature of lung pathologies associated with organic dust exposure, and exposure to organic dust induces the expression of several immune and inflammatory mediators. However, information on transcription factors and cellular and molecular mechanisms controlling the production of immune and inflammatory mediators induced by organic dust is limited. In this study, we have identified STAT-3 as an important transcription factor controlling the induction of expression of immune and inflammatory mediators by poultry dust extracts in airway epithelial cells and in mouse lungs and delineated the cellular pathway for STAT-3 activation. Poultry dust extract activated STAT-3 phosphorylation in Beas2B and normal human bronchial epithelial cells and in mouse lungs. Chemical inhibition and siRNA knockdown of STAT-3 suppressed induction of immune and inflammatory mediator expression. Antioxidants suppressed the increase of STAT-3 phosphorylation induced by poultry dust extract indicating that oxidative stress [elevated reactive oxygen species (ROS) levels] is important for the activation. Chemical inhibition and siRNA knockdown experiments demonstrated that STAT-3 activation is dependent on the activation of nonreceptor tyrosine-protein kinase 2 (TYK2) and epidermal growth factor receptor (EGFR) tyrosine kinases. Our studies show that poultry dust extract controls the induction of immune and inflammatory mediator expression via a cellular pathway involving oxidative stress-mediated STAT-3 activation by TYK2 and EGFR tyrosine kinases.
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Affiliation(s)
- Kartiga Natarajan
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler , Tyler, Texas
| | - Velmurugan Meganathan
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler , Tyler, Texas
| | - Courtney Mitchell
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler , Tyler, Texas
| | - Vijay Boggaram
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler , Tyler, Texas
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25
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Therapeutic Modulation of Virus-Induced Oxidative Stress via the Nrf2-Dependent Antioxidative Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:6208067. [PMID: 30515256 PMCID: PMC6234444 DOI: 10.1155/2018/6208067] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 09/24/2018] [Indexed: 12/17/2022]
Abstract
Virus-induced oxidative stress plays a critical role in the viral life cycle as well as the pathogenesis of viral diseases. In response to reactive oxygen species (ROS) generation by a virus, a host cell activates an antioxidative defense system for its own protection. Particularly, a nuclear factor erythroid 2p45-related factor 2 (Nrf2) pathway works in a front-line for cytoprotection and detoxification. Recently, a series of studies suggested that a group of clinically relevant viruses have the capacity for positive and negative regulations of the Nrf2 pathway. This virus-induced modulation of the host antioxidative response turned out to be a crucial determinant for the progression of several viral diseases. In this review, virus-specific examples of positive and negative modulations of the Nrf2 pathway will be summarized first. Then a number of successful genetic and pharmacological manipulations of the Nrf2 pathway for suppression of the viral replication and the pathogenesis-associated oxidative damage will be discussed later. Understanding of the interplay between virus-induced oxidative stress and antioxidative host response will aid in the discovery of potential antiviral supplements for better management of viral diseases.
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26
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Redox Biology of Respiratory Viral Infections. Viruses 2018; 10:v10080392. [PMID: 30049972 PMCID: PMC6115776 DOI: 10.3390/v10080392] [Citation(s) in RCA: 251] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 07/17/2018] [Accepted: 07/24/2018] [Indexed: 12/16/2022] Open
Abstract
Respiratory viruses cause infections of the upper or lower respiratory tract and they are responsible for the common cold—the most prevalent disease in the world. In many cases the common cold results in severe illness due to complications, such as fever or pneumonia. Children, old people, and immunosuppressed patients are at the highest risk and require fast diagnosis and therapeutic intervention. However, the availability and efficiencies of existing therapeutic approaches vary depending on the virus. Investigation of the pathologies that are associated with infection by respiratory viruses will be paramount for diagnosis, treatment modalities, and the development of new therapies. Changes in redox homeostasis in infected cells are one of the key events that is linked to infection with respiratory viruses and linked to inflammation and subsequent tissue damage. Our review summarizes current knowledge on changes to redox homeostasis, as induced by the different respiratory viruses.
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27
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Antimicrobial actions of dual oxidases and lactoperoxidase. J Microbiol 2018; 56:373-386. [PMID: 29858825 DOI: 10.1007/s12275-018-7545-1] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/16/2018] [Accepted: 02/19/2018] [Indexed: 12/11/2022]
Abstract
The NOX/DUOX family of NADPH oxidases are transmembrane proteins generating reactive oxygen species as their primary enzymatic products. NADPH oxidase (NOX) 1-5 and Dual oxidase (DUOX) 1 and 2 are members of this family. These enzymes have several biological functions including immune defense, hormone biosynthesis, fertilization, cell proliferation and differentiation, extracellular matrix formation and vascular regulation. They are found in a variety of tissues such as the airways, salivary glands, colon, thyroid gland and lymphoid organs. The discovery of NADPH oxidases has drastically transformed our view of the biology of reactive oxygen species and oxidative stress. Roles of several isoforms including DUOX1 and DUOX2 in host innate immune defense have been implicated and are still being uncovered. DUOX enzymes highly expressed in the respiratory and salivary gland epithelium have been proposed as the major sources of hydrogen peroxide supporting mucosal oxidative antimicrobial defenses. In this review, we shortly present data on DUOX discovery, structure and function, and provide a detailed, up-to-date summary of discoveries regarding antibacterial, antiviral, antifungal, and antiparasitic functions of DUOX enzymes. We also present all the literature describing the immune functions of lactoperoxidase, an enzyme working in partnership with DUOX to produce antimicrobial substances.
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28
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Activation of STAT3 and Bcl-2 and reduction of reactive oxygen species (ROS) promote radioresistance in breast cancer and overcome of radioresistance with niclosamide. Oncogene 2018; 37:5292-5304. [PMID: 29855616 DOI: 10.1038/s41388-018-0340-y] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/03/2018] [Accepted: 05/05/2018] [Indexed: 11/08/2022]
Abstract
Radiotherapy significantly improves the therapeutic outcomes and survival of breast cancer patients. However, the acquired resistance to this therapeutic modality is a major clinical challenge. Here we show that ionizing irradiation (IR)-induced phosphorylation of signal transducer and activator of transcription 3 (STAT3) at the Tyr705 residue and the induction of reactive oxygen species (ROS) in wild-type and radioresistant MDA-MB-231 and MDA-MB-468 triple-negative breast cancer (TNBC) cell lines. Comparing with radiosensitive parental TNBC cells, significantly low levels of ROS and higher protein levels of phospho-STAT3 and Bcl-2 were observed in TNBC cells with acquired radioresistance. Moreover, knockdown of STAT3 by shRNA sensitized the TNBC cells to IR. Niclosamide, a potent inhibitor of STAT3, overcame the radioresistance in TNBC cells via inhibition of STAT3 and Bcl-2 and induction of ROS. In combination with radiation, niclosamide treatment resulted in significant increase of ROS generation and induction of apoptosis in parental and radioresistant TNBC cells in vitro and TNBC xenograft tumors in vivo. These findings demonstrate that activation of STAT3 and Bcl-2 and reduction of ROS contribute to the development of radioresistance in TNBC, and niclosamide acts as a potent radiosensitizer via inhibiting STAT3 and Bcl-2 and increasing ROS generation in TNBC cells and xenograft tumors. Our findings suggest that niclosamide in combination with irradiation may offer an effective alternative approach for restoring the sensitivity of radioresistant TNBC cells to IR for improved therapeutic efficacy and outcomes.
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29
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Wang MM, Lu M, Zhang CL, Wu X, Chen JX, Lv WW, Sun T, Qiu H, Huang SH. Oxidative stress modulates the expression of toll‑like receptor 3 during respiratory syncytial virus infection in human lung epithelial A549 cells. Mol Med Rep 2018; 18:1867-1877. [PMID: 29845280 DOI: 10.3892/mmr.2018.9089] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 05/11/2018] [Indexed: 11/05/2022] Open
Abstract
Toll‑like receptor 3 (TLR3) can react with double stranded RNA and is involved in the inflammatory response to respiratory syncytial virus (RSV) infection. Also, oxidative stress has been reported to be involved in RSV infection. However, the correlation between oxidative stress and TLR3 activation during RSV infection is unclear. Therefore, the present study investigated the association between TLR3 expression and oxidative stress modulation during RSV infection in A549 cells. For comparison, seven treatment groups were established, including RSV‑treated cells, N‑acetyl‑L‑cysteine (NAC)+RSV‑treated cells, oxidant hydrogen peroxide (H2O2)+RSV‑treated cells, normal cell control, inactivated RSV control, NAC control and H2O2 control. The mRNA expression changes of TLR3, interferon regulatory factor‑3 (IRF3), nuclear factor‑κB (NF‑κB) and superoxide dismutase 1 (SOD1) were measured using semi‑quantitative reverse transcription‑polymerase chain reaction, and the protein changes of TLR3 and phospho‑NF‑κB p65 were determined using western blot in A549 cells from the different treatment groups. The present study also evaluated the differences in hydroxyl free radical (·OH), nitric oxide (NO) and total SOD activity in the different treatment groups. The results demonstrated that RSV infection of A549 cells increased the levels of ·OH and NO, while decreasing the activity of total SOD. Pretreatment of A549 cells with H2O2 prior to RSV infection upregulated the mRNA and protein expression of TLR3 and NF‑κB, and downregulated the mRNA expression of IRF3 and SOD1, as well as the total SOD activity. When the infected cells were pretreated with NAC, the mRNA and protein expression of these genes were reversed. These variations in the TLR3‑mediated signaling pathway molecules suggested that oxidative stress may be a key regulator for TLR3 activation during RSV infection. RSV‑induced oxidative stress may potentially activate TLR3 and enhance TLR3‑mediated inflammation. These results may provide better understanding of the RSV‑induced inflammatory and immune pathways, and may also contribute to the drug development and prevention of human RSV diseases.
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Affiliation(s)
- Min-Min Wang
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Min Lu
- Department of Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Chuan-Long Zhang
- Department of Pediatrics, The People's Hospital of Lu'an City, Lu'an, Anhui 237005, P.R. China
| | - Xuan Wu
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Jing-Xian Chen
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Wei-Wei Lv
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Tao Sun
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Huan Qiu
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Sheng-Hai Huang
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
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30
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Kalinowski A, Galen BT, Ueki IF, Sun Y, Mulenos A, Osafo-Addo A, Clark B, Joerns J, Liu W, Nadel JA, Cruz CSD, Koff JL. Respiratory syncytial virus activates epidermal growth factor receptor to suppress interferon regulatory factor 1-dependent interferon-lambda and antiviral defense in airway epithelium. Mucosal Immunol 2018; 11:958-967. [PMID: 29411775 PMCID: PMC6431552 DOI: 10.1038/mi.2017.120] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 12/17/2017] [Indexed: 02/04/2023]
Abstract
Respiratory syncytial virus (RSV) persists as a significant human pathogen that continues to contribute to morbidity and mortality. In children, RSV is the leading cause of lower respiratory tract infections, and in adults RSV causes pneumonia and contributes to exacerbations of chronic lung diseases. RSV induces airway epithelial inflammation by activation of the epidermal growth factor receptor (EGFR), a tyrosine kinase receptor. Recently, EGFR inhibition was shown to decrease RSV infection, but the mechanism(s) for this effect are not known. Interferon (IFN) signaling is critical for innate antiviral responses, and recent experiments have implicated IFN-λ (lambda), a type III IFN, as the most significant IFN for mucosal antiviral immune responses to RSV infection. However, a role for RSV-induced EGFR activation to suppress airway epithelial antiviral immunity has not been explored. Here, we show that RSV-induced EGFR activation suppresses IFN regulatory factor (IRF) 1-induced IFN-λ production and increased viral infection, and we implicate RSV F protein to mediate this effect. EGFR inhibition, during viral infection, augmented IRF1, IFN-λ, and decreased RSV titers. These results suggest a mechanism for EGFR inhibition to suppress RSV by activation of endogenous epithelial antiviral defenses, which may be a potential target for novel therapeutics.
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Affiliation(s)
- April Kalinowski
- Section of Pulmonary, Critical Care, & Sleep Medicine,
Yale University
| | - Benjamin T. Galen
- Section of Pulmonary, Critical Care, & Sleep Medicine,
Yale University
| | - Iris F. Ueki
- Division of Pulmonary, Critical Care, Allergy &
Sleep Medicine, University of California San Francisco
| | - Ying Sun
- Section of Pulmonary, Critical Care, & Sleep Medicine,
Yale University
| | - Arielle Mulenos
- Section of Pulmonary, Critical Care, & Sleep Medicine,
Yale University
| | - Awo Osafo-Addo
- Section of Pulmonary, Critical Care, & Sleep Medicine,
Yale University
| | - Brian Clark
- Section of Pulmonary, Critical Care, & Sleep Medicine,
Yale University
| | - John Joerns
- Section of Pulmonary, Critical Care, & Sleep Medicine,
Yale University
| | - Wei Liu
- Section of Pulmonary, Critical Care, & Sleep Medicine,
Yale University
| | - Jay A. Nadel
- Division of Pulmonary, Critical Care, Allergy &
Sleep Medicine, University of California San Francisco
| | - Charles S. Dela Cruz
- Section of Pulmonary, Critical Care, & Sleep Medicine,
Yale University,Department of Microbial Pathogenesis, Yale
University
| | - Jonathan L. Koff
- Section of Pulmonary, Critical Care, & Sleep Medicine,
Yale University
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31
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Ivanciuc T, Sbrana E, Casola A, Garofalo RP. Protective Role of Nuclear Factor Erythroid 2-Related Factor 2 Against Respiratory Syncytial Virus and Human Metapneumovirus Infections. Front Immunol 2018; 9:854. [PMID: 29740449 PMCID: PMC5925606 DOI: 10.3389/fimmu.2018.00854] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 04/06/2018] [Indexed: 11/13/2022] Open
Abstract
The pathogenesis of respiratory syncytial virus (RSV) infections is characterized by lower airway obstruction driven at great extent by the exuberant production of inflammatory cytokines. We have previously shown that RSV infection in vitro and in vivo results in production of reactive oxygen species along with reduction in the expression of antioxidant enzymes (AOEs), which are involved in maintaining the cellular oxidant-antioxidant balance. These events were associated with the concomitant reduction in nuclear factor erythroid 2-related factor 2 (Nrf2), a key transcription factor that controls AOE expression. The objective of the current study was to establish the role of Nrf2 in shaping innate immune responses, clinical disease, airway inflammation, and viral replication in established experimental models of intranasal RSV and human metapneumovirus (hMPV) infections, by employing mice genetically deficient for the Nrf2 gene. Compared to control wild type (WT), mice genetically deficient in Nrf2 (Nrf2 KO) developed enhanced clinical disease, airway inflammation and pathology, and significantly greater lung viral titers following experimental infection with either RSV or hMPV. In particular, compared to control mice, RSV-infected Nrf2 KO mice lost more body weight and had increased airway obstruction at time points characterized by a remarkable increase in inflammatory cytokines and airway neutrophilia. Airway levels of AOEs and enzymes that regulate synthesis of the endogenous hydrogen sulfide (H2S) pathway, which we showed to play an important antiviral function, were also decreased in RSV-infected Nrf2 KO compared to WT. In conclusion, these results suggest that Nrf2 is a critical regulator of innate, inflammatory, and disease-associated responses in the airways of mice infected with viruses that are members of the Pneumoviridae family. Importantly, the results of this study suggest that Nrf2-dependent genes, including those controlling the cellular antioxidant and H2S-generating enzymes and cytokines can affect several aspects of the antiviral response, such as airway neutrophilia, clinical disease, airway obstruction, and viral replication.
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Affiliation(s)
- Teodora Ivanciuc
- Department of Pediatrics, University of Texas Medical Branch, Galveston, TX, United States
| | - Elena Sbrana
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, United States
| | - Antonella Casola
- Department of Pediatrics, University of Texas Medical Branch, Galveston, TX, United States
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, United States
- Sealy Center for Vaccine Development, University of Texas Medical Branch, Galveston, TX, United States
- Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, TX, United States
| | - Roberto P. Garofalo
- Department of Pediatrics, University of Texas Medical Branch, Galveston, TX, United States
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, United States
- Sealy Center for Vaccine Development, University of Texas Medical Branch, Galveston, TX, United States
- Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, TX, United States
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Li M, Li J, Zeng R, Yang J, Liu J, Zhang Z, Song X, Yao Z, Ma C, Li W, Wang K, Wei L. Respiratory Syncytial Virus Replication Is Promoted by Autophagy-Mediated Inhibition of Apoptosis. J Virol 2018; 92:e02193-17. [PMID: 29386287 PMCID: PMC5874425 DOI: 10.1128/jvi.02193-17] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 01/11/2018] [Indexed: 12/15/2022] Open
Abstract
Respiratory syncytial virus (RSV) is the main cause of acute lower respiratory tract infection (ALRI) in children worldwide. Virus-host interactions affect the progression and prognosis of the infection. Autophagy plays important roles in virus-host interactions. Respiratory epithelial cells serve as the front line of host defense during RSV infection, However, it is still unclear how they interact with RSV. In this study, we found that RSV induced autophagy that favored RSV replication and exacerbated lung pathology in vivo Mechanistically, RSV induced complete autophagy flux through reactive oxygen species (ROS) generation and activation of the AMP-activated protein kinase/mammalian target of rapamycin (AMPK-MTOR) signaling pathway in HEp-2 cells. Furthermore, we evaluated the functions of autophagy in RSV replication and found that RSV replication was increased in HEp-2 cells treated with rapamycin but decreased remarkably in cells treated with 3-methylademine (3-MA) or wortmannin. Knockdown key molecules in the autophagy pathway with short hairpinp RNA (shRNA) against autophagy-related gene 5 (ATG5), autophagy-related gene 7 (ATG7), or BECN1/Beclin 1 or treatment with ROS scavenger N-acetyl-l-cysteine (NAC) and AMPK inhibitor (compound C) suppressed RSV replication. 3-MA or shATG5/BECN1 significantly decreased cell viability and increased cell apoptosis at 48 hours postinfection (hpi). Blocking apoptosis with Z-VAD-FMK partially restored virus replication at 48 hpi. Those results provide strong evidence that autophagy may function as a proviral mechanism in a cell-intrinsic manner during RSV infection.IMPORTANCE An understanding of the mechanisms that respiratory syncytial virus utilizes to interact with respiratory epithelial cells is critical to the development of novel antiviral strategies. In this study, we found that RSV induces autophagy through a ROS-AMPK signaling axis, which in turn promotes viral infection. Autophagy favors RSV replication through blocking cell apoptosis at 48 hpi. Mechanistically, RSV induces mitophagy, which maintains mitochondrial homeostasis and therefore decreases cytochrome c release and apoptosis induction. This study provides a novel insight into this virus-host interaction, which may help to exploit new antiviral treatments targeting autophagy processes.
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Affiliation(s)
- Miao Li
- Department of Pathogen Biology, Hebei Medical University, Shijiazhuang, Hebei, China
- Key Laboratory of Immune mechanism and Intervention on Serious Disease in Hebei Province, Shijiazhuang, Hebei, China
| | - Jian Li
- Department of Pathogen Biology, Hebei Medical University, Shijiazhuang, Hebei, China
- Key Laboratory of Immune mechanism and Intervention on Serious Disease in Hebei Province, Shijiazhuang, Hebei, China
| | - Ruihong Zeng
- Department of Immunology, Hebei Medical University, Shijiazhuang, Hebei, China
- Key Laboratory of Immune mechanism and Intervention on Serious Disease in Hebei Province, Shijiazhuang, Hebei, China
| | - Jianling Yang
- Department of Immunology, Hebei Medical University, Shijiazhuang, Hebei, China
- Key Laboratory of Immune mechanism and Intervention on Serious Disease in Hebei Province, Shijiazhuang, Hebei, China
| | - Jianguo Liu
- Division of Infectious Diseases, Allergy and Immunology, Departments of Internal Medicine & Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, USA
| | - Zhengzheng Zhang
- Department of Immunology, Hebei Medical University, Shijiazhuang, Hebei, China
- Key Laboratory of Immune mechanism and Intervention on Serious Disease in Hebei Province, Shijiazhuang, Hebei, China
| | - Xiaotian Song
- Department of Immunology, Hebei Medical University, Shijiazhuang, Hebei, China
- Key Laboratory of Immune mechanism and Intervention on Serious Disease in Hebei Province, Shijiazhuang, Hebei, China
| | - Zhiyan Yao
- Department of Immunology, Hebei Medical University, Shijiazhuang, Hebei, China
- Key Laboratory of Immune mechanism and Intervention on Serious Disease in Hebei Province, Shijiazhuang, Hebei, China
| | - Cuiqing Ma
- Department of Immunology, Hebei Medical University, Shijiazhuang, Hebei, China
- Key Laboratory of Immune mechanism and Intervention on Serious Disease in Hebei Province, Shijiazhuang, Hebei, China
| | - Wenjian Li
- Department of Immunology, Hebei Medical University, Shijiazhuang, Hebei, China
- Key Laboratory of Immune mechanism and Intervention on Serious Disease in Hebei Province, Shijiazhuang, Hebei, China
| | - Kai Wang
- Department of hepatobiliary surgery, Shanghai 455 Hospital, Shanghai, China
| | - Lin Wei
- Department of Immunology, Hebei Medical University, Shijiazhuang, Hebei, China
- Key Laboratory of Immune mechanism and Intervention on Serious Disease in Hebei Province, Shijiazhuang, Hebei, China
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Jeon YJ, Kim HJ. Duox2-induced innate immune responses in the respiratory epithelium and intranasal delivery of Duox2 DNA using polymer that mediates immunization. Appl Microbiol Biotechnol 2018; 102:4339-4343. [PMID: 29600494 DOI: 10.1007/s00253-018-8956-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/19/2018] [Accepted: 03/19/2018] [Indexed: 11/26/2022]
Abstract
Respiratory mucosa especially nasal epithelium is well known as the first-line barrier of air-borne pathogens. High levels of reactive oxygen species (ROS) are detected in in vitro cultured human epithelial cells and in vivo lung. With identification of NADPH oxidase (Nox) system of respiratory epithelium, the antimicrobial role of ROS has been studied. Duox2 is the most abundant Nox isoform and produces the regulated amount of ROS in respiratory epithelium. Duox2-derived ROS are involved in antiviral innate immune responses but more studies are needed to verify the mechanism. In respiratory epithelium, Duox2-derived ROS is critical for recognition of virus through families retinoic acid-inducible gene-I (RIG-I) and melanoma differentiation-associated protein 5 (MDA5) at the early stage of antiviral innate immune responses. Various secreted interferons (IFNs) play essential roles for antiviral host defense by downstream cell signaling, and transcription of IFN-stimulated genes is started to suppress viral replication. Type I and type III IFNs are verified more responsible for influenza A virus (IAV) infection in respiratory epithelium and Duox2 is required to regulate IFN-related immune responses. Transient overexpression of Duox2 using cationic polymer polyethylenimine (PEI) induces secretion of type I and type III IFNs and significantly attenuated IAV replication in respiratory epithelium. Here, we discuss Duox2-mediated antiviral innate immune responses and the role of Duox2 as a mucosal vaccine to resist respiratory viral infection.
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Affiliation(s)
- Yung Jin Jeon
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul National University College of Medicine, 103, Daehak-ro, Jongno-gu, Seoul, South Korea
| | - Hyun Jik Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul National University College of Medicine, 103, Daehak-ro, Jongno-gu, Seoul, South Korea.
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Kim HJ, Seo YH, An S, Jo A, Kwon IC, Kim S. Chemiluminescence imaging of Duox2-derived hydrogen peroxide for longitudinal visualization of biological response to viral infection in nasal mucosa. Am J Cancer Res 2018; 8:1798-1807. [PMID: 29556357 PMCID: PMC5858501 DOI: 10.7150/thno.22481] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 02/02/2018] [Indexed: 12/15/2022] Open
Abstract
Rationale: Hydrogen peroxide (H2O2) provides an important mechanism for resisting infectious pathogens within the respiratory tract, and accordingly, the in situ analysis of H2O2 generation in real time provides a valuable tool for assessing immune response. Methods: In this study, we applied a chemiluminescent nanoparticle-based real-time imaging approach to noninvasive evaluation of the Duox2-mediated H2O2 generation after viral infection, and assessed its usefulness for analytical purposes in mouse nasal mucosa. The chemiluminescent nanoprobe employed herein (BioNT) possesses appropriate physicochemical properties, such as high sensitivity and selectivity toward H2O2, no background noise, deliverability to the respiratory tract, and capability of multiple injections to a single animal subject for long-term repetitive imaging. Results: The favorable characteristics of BioNT allowed for a longitudinal study with the same mice to noninvasively evaluate the long-term evolution of endogenous H2O2 in the nasal epithelium after infection with influenza A virus (WS/33/H1N1). We found that nasal epithelial cells by themselves respond to viral infection by generating H2O2, and that the in vivo cumulative H2O2 level in the nasal mucosa peaks at day 3 post-infection. Such in vitro and in vivo temporal behaviors of the endogenous H2O2 generation showed a good correlation with those of Duox2 expression after infection. This correlation could be further confirmed with Duox2-deficient subjects (Duox2-knockdown NHNE cells and Duox2-knockout mutant mice) where no H2O2-induced chemiluminescence was detectable even after viral infection. Importantly, upon knock-down of Duox2 expression, the condition of mice caused by viral infection in the upper airway was significantly aggravated, evidencing the involvement of Duox2 in the immune defense. Conclusion: All these results reveal a critical role of Duox2 in the infection-induced H2O2 production and the H2O2-mediated immune response to infection in the respiratory tract, well elucidating the potential of BioNT as a noninvasive tool for fundamental in vivo studies of infectious diseases.
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Komaravelli N, Ansar M, Garofalo RP, Casola A. Respiratory syncytial virus induces NRF2 degradation through a promyelocytic leukemia protein - ring finger protein 4 dependent pathway. Free Radic Biol Med 2017; 113:494-504. [PMID: 29107745 PMCID: PMC5699968 DOI: 10.1016/j.freeradbiomed.2017.10.380] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 10/10/2017] [Accepted: 10/23/2017] [Indexed: 01/06/2023]
Abstract
Respiratory syncytial virus (RSV) is the most important cause of viral acute respiratory tract infections and hospitalizations in children, for which no vaccine or specific treatments are available. RSV causes airway mucosa inflammation and cellular oxidative damage by triggering production of reactive oxygen species and by inhibiting at the same time expression of antioxidant enzymes, via degradation of the transcription factor NF-E2-related factor 2 (NRF2). RSV infection induces NRF2 deacetylation, ubiquitination, and degradation through a proteasome-dependent pathway. Although degradation via KEAP1 is the most common mechanism, silencing KEAP1 expression did not rescue NRF2 levels during RSV infection. We found that RSV-induced NRF2 degradation occurs in an SUMO-specific E3 ubiquitin ligase - RING finger protein 4 (RNF4)-dependent manner. NRF2 is progressively SUMOylated in RSV infection and either blocking SUMOylation or silencing RNF4 expression rescued both NRF2 nuclear levels and transcriptional activity. RNF4 associates with promyelocytic leukemia - nuclear bodies (PML-NBs). RSV infection induces the expression of PML and PML-NBs formation in an interferon (INF)-dependent manner and also induces NRF2 - PMN-NBs association. Inhibition of PML-NB formation by blocking IFN pathway or silencing PML expression resulted in a significant reduction of RSV-associated NRF2 degradation and increased antioxidant enzyme expression, identifying the RNF4-PML pathway as a key regulator of antioxidant defenses in the course of viral infection.
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Affiliation(s)
- Narayana Komaravelli
- Departments of Pediatrics, University of Texas Medical Branch at Galveston, TX, USA
| | - Maria Ansar
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA
| | - Roberto P Garofalo
- Departments of Pediatrics, University of Texas Medical Branch at Galveston, TX, USA; Sealy Centers for Vaccine Development, University of Texas Medical Branch at Galveston, TX, USA; Sealy Centers for Molecular Medicine, University of Texas Medical Branch at Galveston, TX, US; Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA
| | - Antonella Casola
- Departments of Pediatrics, University of Texas Medical Branch at Galveston, TX, USA; Sealy Centers for Vaccine Development, University of Texas Medical Branch at Galveston, TX, USA; Sealy Centers for Molecular Medicine, University of Texas Medical Branch at Galveston, TX, US; Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA.
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Wang Y, Yu X, Song H, Feng D, Jiang Y, Wu S, Geng J. The STAT-ROS cycle extends IFN‑induced cancer cell apoptosis. Int J Oncol 2017; 52:305-313. [PMID: 29115415 DOI: 10.3892/ijo.2017.4196] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Accepted: 10/30/2017] [Indexed: 11/06/2022] Open
Abstract
In mammals, the signal transducer and activator of transcription (STAT) protein processes mitochondria importation targets and mitochondria respiratory complexes, and triggers reactive oxygen species (ROS) generation, which conversely rapidly initiates the activation of STAT. Interferon (IFN) administration increases cancer cell apoptosis via STAT activation and ROS accumulation. However, the existence of a STAT-ROS cycle and how it affects IFN‑induced cancer cellular apoptosis are unclear. In the present study, we used MCF7 breast cancer cells and confirmed that a combination of IFN‑α/β/γ incubation induced STAT1/3 phosphorylation and mitochondria importation, which increased mitochondria respiratory complexes, the cellular oxygen consumption rate (OCR), and ROS production, followed by cellular apoptosis. We also found that STAT1/3 overexpression induced mitochondria respiratory complexes and ROS production. Additionally, ROS induced by H2O2 induced phosphorylation of STAT1/3 and promoted mitochondria importation. STAT1/3 deletion suppressed H2O2-induced acute cellular OCR, increasing the ROS level and indicating that STAT1/3 is necessary for ROS-induced mitochondria OCR and further ROS production, suggesting the existence of a STAT-ROS cycle. We next found that IFN induced mitochondria respiratory complexes followed by induction of OCR, ROS, and apoptosis, which were partially blocked by STAT1/3 deletion. Additionally, the suppression of ROS inhibited IFN‑induced STAT1/3 activation. Finally, we discovered that this cycle exists also in A431 and HeLa cancer cells. These results indicate that a STAT-ROS cycle extends IFN‑induced cellular apoptosis.
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Affiliation(s)
- Yan Wang
- Department of Pathology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang 150081, P.R. China
| | - Xiaoyu Yu
- Department of Pathology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang 150081, P.R. China
| | - Hongtao Song
- Department of Pathology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang 150081, P.R. China
| | - Di Feng
- Department of Pathology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang 150081, P.R. China
| | - Yang Jiang
- Department of Pathology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang 150081, P.R. China
| | - Shuang Wu
- Department of Pathology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang 150081, P.R. China
| | - Jingshu Geng
- Department of Pathology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang 150081, P.R. China
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Kim BJ, Cho SW, Jeon YJ, An S, Jo A, Lim JH, Kim DY, Won TB, Han DH, Rhee CS, Kim HJ. Intranasal delivery of Duox2 DNA using cationic polymer can prevent acute influenza A viral infection in vivo lung. Appl Microbiol Biotechnol 2017; 102:105-115. [DOI: 10.1007/s00253-017-8512-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 08/25/2017] [Accepted: 09/09/2017] [Indexed: 12/14/2022]
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Petrellis MC, Frigo L, Marcos RL, Pallotta RC, de Carvalho MHC, Muscará MN, Maria DA, Lopes-Martins RÁB. Laser photobiomodulation of pro-inflammatory mediators on Walker Tumor 256 induced rats. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 177:69-75. [PMID: 29107204 DOI: 10.1016/j.jphotobiol.2017.09.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 06/25/2017] [Accepted: 09/01/2017] [Indexed: 12/11/2022]
Abstract
Laser photobiomodulation or low-level laser therapy (LLLT) is recognized worldwide for its expansive use in medicine. LLLT has been reported to increase enzymatic activity, increasing the mitochondrial transmembrane potential, leading to an increased energy availability and signal transduction. Nevertheless, an inhibitory effect is also observed by the production of excessive ROS which can result the shutdown of mitochondrial energy production, and finally to apoptosis. However, the mechanism of apoptosis induced by LLLT is still not well understood. The main objective of the present study was to investigate the hypothesis that LLLT induces oxidative stress and stimulates the generation of pro-inflammatory markers interfering in tumor progression. METHODS Seventy-two female Walker Tumor induced Wistar rats (eight weeks of age, 200g body weight) were used for this study. TW-256 cells were suspended in phosphate buffered saline and then subcutaneously inoculated at 1×107viabletumorcells/ml per rat into the right flank (tumor-bearing rats). After a period of 14days in order to assess the development of the solid tumor mass, the animals were randomized and distributed in four groups (n=8 animals/group): (1) Control or irradiated by LLLT (2) Laser 1J - 35,7J/cm2, (3) Laser 3J - 107,14J/cm2 and (4) Laser 6J - 214,28J/cm2; (Thera Laser - 660nm, 100mW DMC®, São Carlos, Brazil) at four equidistant points according to their respective treatment groups, conducted three times on alternate days. The regulation and expression of inflammatory mediators IL-1β, IL-6, IL-10, TNF-α was assessed by ELISA and gene expression of COX-1, COX-2, iNOS, eNOS was analyzed by RT-PCR. RESULTS We found that the 1Joule (J) treated group promoted a significant increase in the levels of different inflammatory markers IL-1β, the gene expression of COX-2, iNOS, which was statistically different (p<0.05) when compared among different treatment and control groups. With Respect IL-6, IL-10, TNF-α levels statistically significant reduce was observed in 1Joule treated group when comparing to different energies groups and control group. CONCLUSION Our results suggest the evidence 1J-35,7J/cm2 treatment was able to produce cytotoxic effects by generation of ROS causing acute inflammation and thus may be employed as the best energy dose associated with Photodynamic Therapy.
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Affiliation(s)
- Maria Carla Petrellis
- Department of Pharmacology, Biomedical Sciences Institute, São Paulo University, Av. Lineu Prestes 2415, São Paulo 05508-900, Brazil; Nove de Julho University - UNINOVE, Rua Vergueiro 235, São Paulo 01504-001, Brazil.
| | - Lúcio Frigo
- Cruzeiro do Sul University - UNICSUL, Av. Dr. Ussiel Cirilo 225, São Miguel Paulista, São Paulo 08060-070, Brazil
| | - Rodrigo Labat Marcos
- Nove de Julho University - UNINOVE, Rua Vergueiro 235, São Paulo 01504-001, Brazil
| | - Rodney Capp Pallotta
- Department of Pharmacology, Biomedical Sciences Institute, São Paulo University, Av. Lineu Prestes 2415, São Paulo 05508-900, Brazil; Nove de Julho University - UNINOVE, Rua Vergueiro 235, São Paulo 01504-001, Brazil
| | - Maria Helena Catelli de Carvalho
- Department of Pharmacology, Biomedical Sciences Institute, São Paulo University, Av. Lineu Prestes 2415, São Paulo 05508-900, Brazil
| | - Marcelo Nicolás Muscará
- Department of Pharmacology, Biomedical Sciences Institute, São Paulo University, Av. Lineu Prestes 2415, São Paulo 05508-900, Brazil
| | - Durvanei Augusto Maria
- Biochemistry and Biophysical Laboratory, Butantan Institute, Av. Dr. Vital Brasil, 1500, Butantan, São Paulo 05599-000, Brazil
| | - Rodrigo Álvaro Brandão Lopes-Martins
- Technological Research Center - NPT, Mogi das Cruzes University - UMC, Av. Candido Almeida de Xavier e Souza 200, Mogi das Cruzes, São Paulo 08780-911, Brazil
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Zhuang L, Chen LF, Zhang YB, Liu Z, Xiao XH, Tang W, Wang GC, Song WJ, Li YL, Li MM. Watsonianone A from Rhodomyrtus tomentosa Fruit Attenuates Respiratory-Syncytial-Virus-Induced Inflammation In Vitro. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:3481-3489. [PMID: 28436225 DOI: 10.1021/acs.jafc.7b00537] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Respiratory syncytial virus (RSV) is one of the most common respiratory pathogens. Immoderate inflammation plays a great role in causing RSV-induced diseases. In the present study, watsonianone A, isolated from the fruit of Rhodomyrtus tomentosa (Ait.) Hassk, was found to show a good inhibitory effect on RSV-induced NO production, with a half-maximal inhibitory concentration of 37.2 ± 1.6 μM. Enzyme-linked immunosorbent assay and fluorescence quantitative polymerase chain reaction analyses indicated that watsonianone A markedly reduced both mRNA and protein levels of tumor necrosis factor α, interleukin 6, and monocyte chemoattractant protein 1 in RSV-infected RAW264.7 cells. Mechanistically, watsonianone A inhibited nuclear factor κB (NF-κB) activation by suppressing IκBα phosphorylation. Further analysis revealed that watsonianone A activated the thioredoxin system and decreased intracellular reactive oxygen species (ROS) levels, which are closely associated with NF-κB activation in RSV-infected cells. These results reveal that watsonianone A can attenuate RSV-induced inflammation via the suppression of ROS-sensitive inflammatory signaling.
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Affiliation(s)
- Ling Zhuang
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, and ‡Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong 510632, People's Republic of China
| | - Li-Feng Chen
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, and ‡Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong 510632, People's Republic of China
| | - Yu-Bo Zhang
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, and ‡Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong 510632, People's Republic of China
| | - Zhong Liu
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, and ‡Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong 510632, People's Republic of China
| | - Xu-Hui Xiao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, and ‡Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong 510632, People's Republic of China
| | - Wei Tang
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, and ‡Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong 510632, People's Republic of China
| | - Guo-Cai Wang
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, and ‡Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong 510632, People's Republic of China
| | - Wen-Jun Song
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, and ‡Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong 510632, People's Republic of China
| | - Yao-Lan Li
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, and ‡Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong 510632, People's Republic of China
| | - Man-Mei Li
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, and ‡Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong 510632, People's Republic of China
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Implications of oxidative stress on viral pathogenesis. Arch Virol 2016; 162:907-917. [PMID: 28039563 DOI: 10.1007/s00705-016-3187-y] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 12/08/2016] [Indexed: 12/12/2022]
Abstract
Reactive species are frequently formed after viral infections. Antioxidant defences, including enzymatic and non-enzymatic components, protect against reactive species, but sometimes these defences are not completely adequate. An imbalance in the production of reactive species and the body's inability to detoxify these reactive species is referred to as oxidative stress. The aim of this review is to analyse the role of oxidative stress in the pathogenesis of viral infections and highlight some major therapeutic approaches that have gained importance, with regards to controlling virus-induced oxidative injury. Attention will be focused on DNA viruses (papillomaviruses, hepadnaviruses), RNA viruses (flaviviruses, orthomyxoviruses, paramyxoviruses, togaviruses) and retroviruses (human immunodeficiency virus). In general, viruses cause an imbalance in the cellular redox environment, which depending on the virus and the cell can result in different responses, e.g. cell signaling, antioxidant defences, reactive species, and other processes. Therefore, the modulation of reactive species production and oxidative stress potentially represents a novel pharmacological approach for reducing the consequences of viral pathogenesis.
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Targeting Chromatin Remodeling in Inflammation and Fibrosis. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2016; 107:1-36. [PMID: 28215221 DOI: 10.1016/bs.apcsb.2016.11.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Mucosal surfaces of the human body are lined by a contiguous epithelial cell surface that forms a barrier to aerosolized pathogens. Specialized pattern recognition receptors detect the presence of viral pathogens and initiate protective host responses by triggering activation of the nuclear factor κB (NFκB)/RelA transcription factor and formation of a complex with the positive transcription elongation factor (P-TEFb)/cyclin-dependent kinase (CDK)9 and Bromodomain-containing protein 4 (BRD4) epigenetic reader. The RelA·BRD4·P-TEFb complex produces acute inflammation by regulating transcriptional elongation, which produces a rapid genomic response by inactive genes maintained in an open chromatin configuration engaged with hypophosphorylated RNA polymerase II. We describe recent studies that have linked prolonged activation of the RelA-BRD4 pathway with the epithelial-mesenchymal transition (EMT) by inducing a core of EMT corepressors, stimulating secretion of growth factors promoting airway fibrosis. The mesenchymal state produces rewiring of the kinome and reprogramming of innate responses toward inflammation. In addition, the core regulator Zinc finger E-box homeodomain 1 (ZEB1) silences the expression of the interferon response factor 1 (IRF1), required for type III IFN expression. This epigenetic silencing is mediated by the Enhancer of Zeste 2 (EZH2) histone methyltransferase. Because of their potential applications in cancer and inflammation, small-molecule inhibitors of NFκB/RelA, CDK9, BRD4, and EZH2 have been the targets of medicinal chemistry efforts. We suggest that disruption of the RelA·BRD4·P-TEFb pathway and EZH2 methyltransferase has important implications for reversing fibrosis and restoring normal mucosal immunity in chronic inflammatory diseases.
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Zhao H, Eguchi S, Alam A, Ma D. The role of nuclear factor-erythroid 2 related factor 2 (Nrf-2) in the protection against lung injury. Am J Physiol Lung Cell Mol Physiol 2016; 312:L155-L162. [PMID: 27864288 DOI: 10.1152/ajplung.00449.2016] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 11/15/2016] [Accepted: 11/15/2016] [Indexed: 12/17/2022] Open
Abstract
Nuclear factor-erythroid 2 related factor 2 (Nrf2) is a ubiquitous master transcription factor that upregulates antioxidant response elements (AREs)-mediated expression of antioxidant enzyme and cytoprotective proteins. Activation of Nrf2 has been shown to be protective against lung injury. In the lung, diverse stimuli including environmental oxidants, medicinal agents, and pathogens can activate Nrf2. Nrf2 translocates to the nucleus and binds to an ARE. Through transcriptional induction of ARE-bearing genes encoding antioxidant-detoxifying proteins, Nrf2 induces cellular rescue pathways against oxidative pulmonary injury, abnormal inflammatory and immune responses, and apoptosis. The Nrf2-antioxidant pathway has been shown to be important in the protection against various lung injuries including acute lung injury/acute respiratory distress syndrome and bronchopulmonary dysplasia, chronic obstructive pulmonary disease, idiopathic pulmonary fibrosis, asthma, and allergy and was widely examined for new therapeutic targets. The present review explores the protective role of Nrf-2 against lung injury and the therapeutic potential in targeting Nrf-2.
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Affiliation(s)
- Hailin Zhao
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, United Kingdom
| | - Shiori Eguchi
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, United Kingdom
| | - Azeem Alam
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, United Kingdom
| | - Daqing Ma
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, United Kingdom
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Hosakote YM, Brasier AR, Casola A, Garofalo RP, Kurosky A. Respiratory Syncytial Virus Infection Triggers Epithelial HMGB1 Release as a Damage-Associated Molecular Pattern Promoting a Monocytic Inflammatory Response. J Virol 2016; 90:9618-9631. [PMID: 27535058 PMCID: PMC5068515 DOI: 10.1128/jvi.01279-16] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 08/03/2016] [Indexed: 12/18/2022] Open
Abstract
Respiratory syncytial virus (RSV) is the leading cause of lower respiratory tract infections in infant and elderly populations worldwide. Currently, there is no efficacious vaccine or therapy available for RSV infection. The molecular mechanisms underlying RSV-induced acute airway disease and associated long-term consequences remain largely unknown; however, experimental evidence suggests that the lung inflammatory response plays a fundamental role in the outcome of RSV infection. High-mobility group box 1 (HMGB1) is a nuclear protein that triggers inflammation when released from activated immune or necrotic cells and drives the pathogenesis of various infectious agents. Although HMGB1 has been implicated in many inflammatory diseases, its role in RSV-induced airway inflammation has not been investigated. This study investigates the molecular mechanism of action of extracellularly released HMGB1 in airway epithelial cells (A549 and small airway epithelial cells) to establish its role in RSV infection. Immunofluorescence microscopy and Western blotting results showed that RSV infection of human airway epithelial cells induced a significant release of HMGB1 as a result of translocation of HMGB1 from the cell nuclei to the cytoplasm and subsequent release into the extracellular space. Treating RSV-infected A549 cells with antioxidants significantly inhibited RSV-induced HMGB1 extracellular release. Studies using recombinant HMGB1 triggered immune responses by activating primary human monocytes. Finally, HMGB1 released by airway epithelial cells due to RSV infection appears to function as a paracrine factor priming epithelial cells and monocytes to inflammatory stimuli in the airways. IMPORTANCE RSV is a major cause of serious lower respiratory tract infections in young children and causes severe respiratory morbidity and mortality in the elderly. In addition, to date there is no effective treatment or vaccine available for RSV infection. The mechanisms responsible for RSV-induced acute airway disease and associated long-term consequences remain largely unknown. The oxidative stress response in the airways plays a major role in the pathogenesis of RSV. HMGB1 is a ubiquitous redox-sensitive multifunctional protein that serves as both a DNA regulatory protein and an extracellular cytokine signaling molecule that promotes airway inflammation as a damage-associated molecular pattern. This study investigated the mechanism of action of HMGB1 in RSV infection with the aim of identifying new inflammatory pathways at the molecular level that may be amenable to therapeutic interventions.
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Affiliation(s)
- Yashoda M Hosakote
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas, USA Institute for Translational Sciences, The University of Texas Medical Branch, Galveston, Texas, USA
| | - Allan R Brasier
- Department of Internal Medicine, Division of Endocrinology, The University of Texas Medical Branch, Galveston, Texas, USA Sealy Center for Molecular Medicine, The University of Texas Medical Branch, Galveston, Texas, USA Institute for Translational Sciences, The University of Texas Medical Branch, Galveston, Texas, USA
| | - Antonella Casola
- Sealy Center for Molecular Medicine, The University of Texas Medical Branch, Galveston, Texas, USA Department of Pediatrics, The University of Texas Medical Branch, Galveston, Texas, USA Sealy Center for Vaccine Development, The University of Texas Medical Branch, Galveston, Texas, USA
| | - Roberto P Garofalo
- Sealy Center for Molecular Medicine, The University of Texas Medical Branch, Galveston, Texas, USA Department of Pediatrics, The University of Texas Medical Branch, Galveston, Texas, USA Sealy Center for Vaccine Development, The University of Texas Medical Branch, Galveston, Texas, USA
| | - Alexander Kurosky
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas, USA Sealy Center for Molecular Medicine, The University of Texas Medical Branch, Galveston, Texas, USA
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Shi H, Ren K, Lv B, Zhang W, Zhao Y, Tan RX, Li E. Baicalin from Scutellaria baicalensis blocks respiratory syncytial virus (RSV) infection and reduces inflammatory cell infiltration and lung injury in mice. Sci Rep 2016; 6:35851. [PMID: 27767097 PMCID: PMC5073294 DOI: 10.1038/srep35851] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 10/06/2016] [Indexed: 12/26/2022] Open
Abstract
The roots of Scutellaria baicalensis has been used as a remedy for inflammatory and infective diseases for thousands of years. We evaluated the antiviral activity against respiratory syncytial virus (RSV) infection, the leading cause of childhood infection and hospitalization. By fractionation and chromatographic analysis, we determined that baicalin was responsible for the antiviral activity of S. baicalensis against RSV infection. The concentration for 50% inhibition (IC50) of RSV infection was determined at 19.9 ± 1.8 μM, while the 50% cytotoxic concentration (CC50) was measured at 370 ± 10 μM. We then used a mouse model of RSV infection to further demonstrate baicalin antiviral effect. RSV infection caused significant lung injury and proinflammatory response, including CD4 and CD8 T lymphocyte infiltration. Baicalin treatment resulted in reduction of T lymphocyte infiltration and gene expression of proinflammatory factors, while the treatment moderately reduced RSV titers recovered from the lung tissues. T lymphocyte infiltration and cytotoxic T lymphocyte modulated tissue damage has been identified critical factors of RSV disease. The study therefore demonstrates that baicalin subjugates RSV disease through antiviral and anti-inflammatory effect.
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Affiliation(s)
- Hengfei Shi
- Medical School and State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China.,Jiangsu Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| | - Ke Ren
- Medical School and State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China.,Jiangsu Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| | - Baojie Lv
- Medical School and State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China.,College of Life Sciences, Nanjing University, Nanjing, China
| | - Wei Zhang
- Nanjing University of Chinese Medicine, Nanjing, China
| | - Ying Zhao
- Medical School and State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Ren Xiang Tan
- Medical School and State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China.,College of Life Sciences, Nanjing University, Nanjing, China.,Nanjing University of Chinese Medicine, Nanjing, China
| | - Erguang Li
- Medical School and State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China.,Jiangsu Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
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Suppression of IRG-1 Reduces Inflammatory Cell Infiltration and Lung Injury in Respiratory Syncytial Virus Infection by Reducing Production of Reactive Oxygen Species. J Virol 2016; 90:7313-7322. [PMID: 27252532 DOI: 10.1128/jvi.00563-16] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Accepted: 05/25/2016] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED Respiratory syncytial virus (RSV) infection is a common cause of lower respiratory tract illness in infants and children. RSV is a negative-sense, single-strand RNA (ssRNA) virus that mainly infects airway epithelial cells. Accumulating evidence indicates that reactive oxygen species (ROS) production is a major factor for pulmonary inflammation and tissue damage of RSV disease. We investigated immune-responsive gene-1 (IRG1) expression during RSV infection, since IRG1 has been shown to mediate innate immune response to intracellular bacterial pathogens by modulating ROS and itaconic acid production. We found that RSV infection induced IRG1 expression in human A549 cells and in the lung tissues of RSV-infected mice. RSV infection or IRG1 overexpression promoted ROS production. Accordingly, knockdown of IRG1 induction blocked RSV-induced ROS production and proinflammatory cytokine gene expression. Finally, we showed that suppression of IRG1 induction reduced immune cell infiltration and prevented lung injury in RSV-infected mice. These results therefore link IRG1 induction to ROS production and immune lung injury after RSV infection. IMPORTANCE RSV infection is among the most common causes of childhood diseases. Recent studies identify ROS production as a factor contributing to RSV disease. We investigated the cause of ROS production and identified IRG1 as a critical factor linking ROS production to immune lung injury after RSV infection. We found that IRG1 was induced in A549 alveolar epithelial cells and in mouse lungs after RSV infection. Importantly, suppression of IRG1 induction reduced inflammatory cell infiltration and lung injury in mice. This study links IRG1 induction to oxidative damage and RSV disease. It also uncovers a potential therapeutic target in reducing RSV-caused lung injury.
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Cervantes-Ortiz SL, Zamorano Cuervo N, Grandvaux N. Respiratory Syncytial Virus and Cellular Stress Responses: Impact on Replication and Physiopathology. Viruses 2016; 8:v8050124. [PMID: 27187445 PMCID: PMC4885079 DOI: 10.3390/v8050124] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 04/14/2016] [Accepted: 04/21/2016] [Indexed: 02/08/2023] Open
Abstract
Human respiratory syncytial virus (RSV), a member of the Paramyxoviridae family, is a major cause of severe acute lower respiratory tract infection in infants, elderly and immunocompromised adults. Despite decades of research, a complete integrated picture of RSV-host interaction is still missing. Several cellular responses to stress are involved in the host-response to many virus infections. The endoplasmic reticulum stress induced by altered endoplasmic reticulum (ER) function leads to activation of the unfolded-protein response (UPR) to restore homeostasis. Formation of cytoplasmic stress granules containing translationally stalled mRNAs is a means to control protein translation. Production of reactive oxygen species is balanced by an antioxidant response to prevent oxidative stress and the resulting damages. In recent years, ongoing research has started to unveil specific regulatory interactions of RSV with these host cellular stress responses. Here, we discuss the latest findings regarding the mechanisms evolved by RSV to induce, subvert or manipulate the ER stress, the stress granule and oxidative stress responses. We summarize the evidence linking these stress responses with the regulation of RSV replication and the associated pathogenesis.
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Affiliation(s)
- Sandra L Cervantes-Ortiz
- CRCHUM-Centre Hospitalier de l'Université de Montréal, Montréal, QC H2X 0A9, Canada.
- Faculty of Medicine, Université de Montréal, Montréal, QC H3C 3J7, Canada.
- Department of Microbiology, Infectiology and Immunology, Université de Montréal, Montréal, QC H3C 3J7, Canada.
| | - Natalia Zamorano Cuervo
- CRCHUM-Centre Hospitalier de l'Université de Montréal, Montréal, QC H2X 0A9, Canada.
- Faculty of Medicine, Université de Montréal, Montréal, QC H3C 3J7, Canada.
| | - Nathalie Grandvaux
- CRCHUM-Centre Hospitalier de l'Université de Montréal, Montréal, QC H2X 0A9, Canada.
- Faculty of Medicine, Université de Montréal, Montréal, QC H3C 3J7, Canada.
- Department of Biochemistry and Molecular Medicine, Université de Montréal, Montréal, QC H3C 3J7, Canada.
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Martínez I, García-Carpizo V, Guijarro T, García-Gomez A, Navarro D, Aranda A, Zambrano A. Induction of DNA double-strand breaks and cellular senescence by human respiratory syncytial virus. Virulence 2016; 7:427-42. [PMID: 26809688 DOI: 10.1080/21505594.2016.1144001] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Human respiratory syncytial virus (HRSV) accounts for the majority of lower respiratory tract infections during infancy and childhood and is associated with significant morbidity and mortality. HRSV provokes a proliferation arrest and characteristic syncytia in cellular systems such as immortalized epithelial cells. We show here that HRSV induces the expression of DNA damage markers and proliferation arrest such as P-TP53, P-ATM, CDKN1A and γH2AFX in cultured cells secondary to the production of mitochondrial reactive oxygen species (ROS). The DNA damage foci contained γH2AFX and TP53BP1, indicative of double-strand breaks (DSBs) and could be reversed by antioxidant treatments such as N-Acetylcysteine (NAC) or reduced glutathione ethyl ester (GSHee). The damage observed is associated with the accumulation of senescent cells, displaying a canonical senescent phenotype in both mononuclear cells and syncytia. In addition, we show signs of DNA damage and aging such as γH2AFX and CDKN2A expression in the respiratory epithelia of infected mice long after viral clearance. Altogether, these results show that HRSV triggers a DNA damage-mediated cellular senescence program probably mediated by oxidative stress. The results also suggest that this program might contribute to the physiopathology of the infection, tissue remodeling and aging, and might be associated to long-term consequences of HRSV infections.
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Affiliation(s)
- Isidoro Martínez
- a Department of Molecular Pathology , Spanish National Center for Microbiology, Institute of Health Carlos III , Madrid , Spain
| | - Verónica García-Carpizo
- b Department of Endocrine Physiopathology and Nervous System , Institute for Biomedical Research (IIBM), CSIC-UAM , Madrid , Spain
| | - Trinidad Guijarro
- a Department of Molecular Pathology , Spanish National Center for Microbiology, Institute of Health Carlos III , Madrid , Spain
| | - Ana García-Gomez
- a Department of Molecular Pathology , Spanish National Center for Microbiology, Institute of Health Carlos III , Madrid , Spain
| | - Diego Navarro
- b Department of Endocrine Physiopathology and Nervous System , Institute for Biomedical Research (IIBM), CSIC-UAM , Madrid , Spain
| | - Ana Aranda
- b Department of Endocrine Physiopathology and Nervous System , Institute for Biomedical Research (IIBM), CSIC-UAM , Madrid , Spain
| | - Alberto Zambrano
- a Department of Molecular Pathology , Spanish National Center for Microbiology, Institute of Health Carlos III , Madrid , Spain
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Moreno-Solís G, Dela Torre-Aguilar MJ, Torres-Borrego J, Llorente-Cantarero FJ, Fernández-Gutiérrez F, Gil-Campos M, Túnez-Fiñana I, Pérez-Navero JL. Oxidative stress and inflamatory plasma biomarkers in respiratory syncytial virus bronchiolitis. CLINICAL RESPIRATORY JOURNAL 2016; 11:839-846. [PMID: 26663823 DOI: 10.1111/crj.12425] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 11/18/2015] [Accepted: 12/04/2015] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Oxidative stress (OS) plays a crucial role in the pathogenesis of inflammatory lung diseases. OBJECTIVES (i) We determined whether acute bronchiolitis (AB) caused by respiratory syncytial virus (RSV) induced OS; (ii) assessed whether OS biomarkers correlated with the severity of RSV-AB; and (iii) studied whether the levels of interleukins are associated with OS biomarkers. METHODS We performed an observational study by comparing healthy infants (Group 1) with RSV-AB infants, classified as Group 2 (pulse oximetry (SpO2 ) >93%), and Group 3 (SpO2 ≤ 92%), which needed oxygen therapy. Blood samples were collected to determine the levels of lipid peroxidation (LPO) products (LPO), total glutathione (TG), oxidised glutathione (GSSG), reduced glutathione (GSH), glutathione peroxidase (GPx), interleukins (ILs) IL-10, IL-6, IL-8, interferon-gamma (IFNγ), tumour necrosis factor-alpha (TNFα) and macrophage inflammatory proteins (MIP α and MIP β). RESULTS Forty-six RSV-AB infants (47% needed oxygen therapy) and 27 healthy infants were included. The GSH/GSSG ratio was lower in RSV-AB infants than in Group 1 (P<0.001). GSSG and GPx were significantly higher in Group 3. GSSG predicted the need for oxygen therapy with an optimal cut-off point of 15 µM/g for haemoglobin. The GSH/GSSG ratio negatively correlated with IL-6 (P: 0.014), IL-8 (P: 0.014) and IL-10 (P: 0.033). Group 3 exhibited a direct correlation between GPx and IL-10 levels (P: 0.024) and between LPO and MIP β (P: 0.003). CONCLUSIONS RSV induced OS in AB. An increase in GSSG correlated with the disease severity in the infants. OS may contribute to the pathogenesis of RSV-AB.
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Affiliation(s)
- Gloria Moreno-Solís
- Department of Paediatrics, Paediatric Pulmonology and Allergy Unit, Reina Sofia University Hospital, Cordoba, Spain
| | | | - Javier Torres-Borrego
- Department of Paediatrics, Paediatric Pulmonology and Allergy Unit, Reina Sofia University Hospital, Cordoba, Spain
| | | | - Fernando Fernández-Gutiérrez
- Department of Paediatrics, Unit of Metabolism and Paediatric Research, Reina Sofia University Hospital, Cordoba, Spain
| | - Mercedes Gil-Campos
- Faculty of Medicine, Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), University of Cordoba, Spain.,Department of Paediatrics, Unit of Metabolism and Paediatric Research, Reina Sofia University Hospital, Cordoba, Spain
| | - Isaac Túnez-Fiñana
- Faculty of Medicine, Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), University of Cordoba, Spain
| | - Juan Luis Pérez-Navero
- Faculty of Medicine, Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), University of Cordoba, Spain.,Department of Paediatrics, Unit of Metabolism and Paediatric Research, Reina Sofia University Hospital, Cordoba, Spain
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49
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Kim HJ, Kim CH, Kim MJ, Ryu JH, Seong SY, Kim S, Lim SJ, Holtzman MJ, Yoon JH. The Induction of Pattern-Recognition Receptor Expression against Influenza A Virus through Duox2-Derived Reactive Oxygen Species in Nasal Mucosa. Am J Respir Cell Mol Biol 2015; 53:525-35. [PMID: 25751630 DOI: 10.1165/rcmb.2014-0334oc] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
We studied the relative roles of Duox2-derived reactive oxygen species (ROS) in host defense against influenza A virus (IAV) infection in normal human nasal epithelial cells and mouse nasal mucosa. We found that Duox2 primarily generated ROS rapidly after IAV infection in normal human nasal epithelial cells and that knockdown of Duox2 aggravated IAV infection. In addition, Duox2-derived ROS enhancement significantly suppressed IAV infection in nasal epithelium. In particular, Duox2-derived ROS were required for the induction of retinoic acid-inducible gene (RIG)-I and melanoma differentiation-associated protein 5 (MDA5) transcription. After intranasal IAV inoculation into mice, viral infection was significantly aggravated from 3 days postinoculation (dpi) in the nasal mucosa, and the IAV viral titer was highest at 7 dpi. Both RIG-I and MDA5 messenger RNA levels increased dominantly in mouse nasal mucosa from 3 dpi; consistent with this, RIG-I and MDA5 proteins were also induced after IAV infection. RIG-I and MDA5 messenger RNA levels were induced to a lower extent in the nasal mucosa of the mice that were inoculated with Duox2 short hairpin RNA, and the IAV viral titer was significantly higher in nasal lavage. Taken together, Duox2-derived ROS are necessary for the innate immune response and trigger the induction of RIG-I and MDA5 to resist IAV infection in human nasal epithelium and mouse nasal mucosa.
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Affiliation(s)
- Hyun Jik Kim
- 1 Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Korea.,2 The Airway Mucus Institute
| | - Chang-Hoon Kim
- 3 Department of Otorhinolaryngology.,2 The Airway Mucus Institute
| | - Min-Ji Kim
- 4 Research Center for Natural Human Defense System, Yonsei University College of Medicine, Seoul, Korea
| | - Ji-Hwan Ryu
- 4 Research Center for Natural Human Defense System, Yonsei University College of Medicine, Seoul, Korea
| | | | - Sujin Kim
- 4 Research Center for Natural Human Defense System, Yonsei University College of Medicine, Seoul, Korea
| | - Su Jin Lim
- 1 Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Korea
| | - Michael J Holtzman
- 5 Department of Medicine, Drug Discovery Program, Pulmonary and Critical Care Medicine, and.,6 Department of Cell Biology, Washington University School of Medicine, St. Louis, Missouri; and
| | - Joo-Heon Yoon
- 3 Department of Otorhinolaryngology.,2 The Airway Mucus Institute.,7 BK 21 Project for Medical Science, and.,4 Research Center for Natural Human Defense System, Yonsei University College of Medicine, Seoul, Korea
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Oxidative stress enables Epstein-Barr virus-induced B-cell transformation by posttranscriptional regulation of viral and cellular growth-promoting factors. Oncogene 2015; 35:3807-16. [PMID: 26592445 DOI: 10.1038/onc.2015.450] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 10/14/2015] [Accepted: 10/22/2015] [Indexed: 12/13/2022]
Abstract
Infection of human B lymphocytes by Epstein-Barr virus (EBV) leads to the establishment of immortalized lymphoblastoid cell lines (LCLs) that are widely used as a model of viral oncogenesis. An early consequence of infection is the induction of DNA damage and activation of the DNA damage response, which limits the efficiency of growth transformation. The cause of the DNA damage remains poorly understood. We have addressed this question by comparing the response of B lymphocytes infected with EBV or stimulated with a potent B-cell mitogen. We found that although the two stimuli induce comparable proliferation during the first 10 days of culture, the EBV-infected blasts showed significantly higher levels of DNA damage, which correlated with stronger and sustained accumulation of reactive oxygen species (ROS). Treatment with ROS scavengers decreased DNA damage in both mitogen-stimulated and EBV-infected cells. However, while mitogen-induced proliferation was slightly improved, the proliferation of EBV-infected cells and the establishment of LCLs were severely impaired. Quenching of ROS did not affect the kinetics and magnitude of viral gene expression but was associated with selective downregulation of the viral LMP1 and phosphorylated cellular transcription factor STAT3 that have key roles in transformation. Analysis of the mechanism by which high levels of ROS support LMP1 expression revealed selective inhibition of viral microRNAs that target the LMP1 transcript. Our study provides novel insights into the role of EBV-induced oxidative stress in promoting B-cell immortalization and malignant transformation.
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