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Montgomery-Song A, Ashraf S, Santerre P, Kandel R. Senescent response in inner annulus fibrosus cells in response to TNFα, H2O2, and TNFα-induced nucleus pulposus senescent secretome. PLoS One 2024; 19:e0280101. [PMID: 38181003 PMCID: PMC10769024 DOI: 10.1371/journal.pone.0280101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 11/01/2023] [Indexed: 01/07/2024] Open
Abstract
Senescence, particularly in the nucleus pulposus (NP) cells, has been implicated in the pathogenesis of disc degeneration, however, the mechanism(s) of annulus fibrosus (AF) cell senescence is still not well understood. Both TNFα and H2O2, have been implicated as contributors to the senescence pathways, and their levels are increased in degenerated discs when compared to healthy discs. Thus, the objective of this study is to identify factor(s) that induces inner AF (iAF) cell senescence. Under TNFα exposure, at a concentration previously shown to induce senescence in NP cells, bovine iAF cells did not undergo senescence, indicated by their ability to continue to proliferate as demonstrated by Ki67 staining and growth curves and lack of expression of the senescent markers, p16 and p21. The lack of senescent response occurred even though iAF express higher levels of TNFR1 than NP cells. Interestingly, iAF cells showed no increase in intracellular ROS or secreted H2O2 in response to TNFα which contrasted to NP cells that did. Following TNFα treatment, only iAF cells had increased expression of the superoxide scavengers SOD1 and SOD2 whereas NP cells had increased NOX4 gene expression, an enzyme that can generate H2O2. Treating iAF cells with low dose H2O2 (50 μM) induced senescence, however unlike TNFα, H2O2 did not induce degenerative-like changes as there was no difference in COL2, ACAN, MMP13, or IL6 gene expression or number of COL2 and ACAN immunopositive cells compared to untreated controls. The latter result suggests that iAF cells may have distinct degenerative and senescent phenotypes. To evaluate paracrine signalling by senescent NP cells, iAF and TNFα-treated NP cells were co-cultured. In contact co-culture the NP cells induced iAF senescence. Thus, senescent NP cells may secrete soluble factors that induce degenerative and senescent changes within the iAF. This may contribute to a positive feedback loop of disc degeneration. It is possible these factors may include H2O2 and cytokines (such as TNFα). Further studies will investigate if human disc cells respond similarly.
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Affiliation(s)
| | - Sajjad Ashraf
- Pathology and Laboratory Medicine, Mt. Sinai Hospital and Lunenfeld-Tanenbaum Research Institute, Toronto, Canada
| | - Paul Santerre
- Biomedical Engineering, University of Toronto, Toronto, Canada
| | - Rita Kandel
- Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
- Pathology and Laboratory Medicine, Mt. Sinai Hospital and Lunenfeld-Tanenbaum Research Institute, Toronto, Canada
- Biomedical Engineering, University of Toronto, Toronto, Canada
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2
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Dugbartey GJ, Alornyo KK, Ohene BO, Boima V, Antwi S, Sener A. Renal consequences of the novel coronavirus disease 2019 (COVID-19) and hydrogen sulfide as a potential therapy. Nitric Oxide 2022; 120:16-25. [PMID: 35032641 PMCID: PMC8755416 DOI: 10.1016/j.niox.2022.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 01/06/2022] [Accepted: 01/10/2022] [Indexed: 12/14/2022]
Abstract
The novel coronavirus disease 2019 (COVID-19), caused by SARS-CoV-2, is a global pandemic which is primarily considered a respiratory illness. However, emerging reports show that the virus exhibits both pulmonary and extra-pulmonary manifestations in humans, with the kidney as a major extra-pulmonary target due to its abundant expression of angiotensin-converting enzyme 2 and transmembrane protease serine 2, which facilitate entry of the virus into cells. Acute kidney injury has become prevalent in COVID-19 patients without prior any history of kidney dysfunction. In addition, the virus also worsens kidney conditions and increases mortality of COVID-19 patients with pre-existing chronic kidney disease, renal cancer, diabetic nephropathy, end-stage kidney disease as well as dialysis and kidney transplant patients. In the search for antiviral agents for the treatment of COVID-19, hydrogen sulfide (H2S), the third established member of gasotransmitter family, is emerging as a potential candidate, possessing important therapeutic properties including antiviral, anti-inflammatory, anti-thrombotic and antioxidant properties. A recent clinical study revealed higher serum H2S levels in survivors of COVID-19 pneumonia with reduced interleukin-6 levels compared to fatal cases. In this review, we summarize the global impact of COVID-19 on kidney conditions and discuss the emerging role of H2S as a potential COVID-19 therapy.
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Affiliation(s)
- George J Dugbartey
- Department of Pharmacology and Toxicology, School of Pharmacy, College of Health Sciences, University of Ghana, Legon, Accra, Ghana.
| | - Karl K Alornyo
- Department of Pharmacology and Toxicology, School of Pharmacy, College of Health Sciences, University of Ghana, Legon, Accra, Ghana
| | - Bright O Ohene
- Department of Pharmacology and Toxicology, School of Pharmacy, College of Health Sciences, University of Ghana, Legon, Accra, Ghana
| | - Vincent Boima
- Department of Medicine and Therapeutics, University of Ghana Medical School, College of Health Sciences, University of Ghana, Legon, Accra, Ghana
| | - Sampson Antwi
- Department of Child Health, School of Medical Sciences, Kwame Nkrumah University of Science and Technology and Komfo Anokye Teaching Hospital, Kumasi, Ghana
| | - Alp Sener
- Department of Surgery, Division of Urology, London Health Sciences Center, Western University, London, Ontario, Canada; Matthew Mailing Center for Translational Transplant Studies, London Health Sciences Center, Western University, London, Ontario, Canada; Multi-organ Transplant Program, London Health Sciences Center, Ontario, Canada; Department of Microbiology and Immunology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
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3
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AbdElHady MS, Ibrahim ST, Adam A, Elnekidy A, Lewis N, Gawesh RI. DO VITAMIN D DEFICIENCY AND HEPATITIS C VIRUS INFECTION PLAY A ROLE IN OXIDATIVE STRESS IN PATIENTS ON MAINTENANCE HEMODIALYSIS? ALEXANDRIA JOURNAL OF MEDICINE 2021. [DOI: 10.1080/20905068.2021.1956831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Mahmoud S. AbdElHady
- Department of Internal Medicine and Nephrology Department, Kafr ELSheikh University, Egypt
| | - Sara T Ibrahim
- Department of Internal Medicine and Nephrology Department, Faculty of Medicine, Alexandria University, Alexandria Egypt
| | - Ahmed Adam
- Department of Internal Medicine and Nephrology Department, Faculty of Medicine, Alexandria University, Alexandria Egypt
| | - Abelaziz Elnekidy
- Department of Radiodiagnosis Faculty of Medicine Alexandria University, Egypt
| | - Neveen Lewis
- Department of Clinical Pathology Department, Alexandria University Hospital, Egypt
| | - Rasha Ibrahim Gawesh
- Department of Internal Medicine and Nephrology Department, Faculty of Medicine, Alexandria University, Alexandria Egypt
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4
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Rubio CP, Cerón JJ. Spectrophotometric assays for evaluation of Reactive Oxygen Species (ROS) in serum: general concepts and applications in dogs and humans. BMC Vet Res 2021; 17:226. [PMID: 34174882 PMCID: PMC8235564 DOI: 10.1186/s12917-021-02924-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 06/04/2021] [Indexed: 02/07/2023] Open
Abstract
Reactive oxygen species (ROS) are reactive compounds derived from oxygen. In biological systems, an excessive amount of ROS can cause oxidative damage to biological macromolecules being involved in different diseases. Several assays have been developed in the last 30 years for ROS evaluation. The objective of this article will be to provide an update about the spectrophotometric methods currently used in the assessment of ROS in serum. The chemical basis of four different techniques will be reviewed, and examples of their possible applications will be provided. A particular emphasis about the practical applications of these assays in the dog will be made, but selected information about their use in humans will also be presented for comparative purposes, following a One-Health approach. The information about the spectrophotometric assays presented in this paper should be interpreted with caution once limited information about them is available yet, and further studies should be performed to clarify what they measure and their clinical application. Ideally, when applied to evaluate a sample's oxidative status, they should be incorporated in a panel of analytes where other oxidants, antioxidants, and biomarkers of inflammation were also included.
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Affiliation(s)
- Camila Peres Rubio
- Interdisciplinary Laboratory of Clinical Analysis (Interlab-UMU), Veterinary School, Campus of Excellence Mare Nostrum, University of Murcia, Campus de Espinardo s/n, 30100, Murcia, Spain
| | - José Joaquin Cerón
- Interdisciplinary Laboratory of Clinical Analysis (Interlab-UMU), Veterinary School, Campus of Excellence Mare Nostrum, University of Murcia, Campus de Espinardo s/n, 30100, Murcia, Spain.
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5
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Gu C, Xiao L, Shang J, Xu X, He L, Xiang Y. Chemical synthesis of stimuli-responsive guide RNA for conditional control of CRISPR-Cas9 gene editing. Chem Sci 2021; 12:9934-9945. [PMID: 34377390 PMCID: PMC8317661 DOI: 10.1039/d1sc01194d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 05/18/2021] [Indexed: 12/23/2022] Open
Abstract
CRISPR-Cas9 promotes changes in identity or abundance of nucleic acids in live cells and is a programmable modality of broad biotechnological and therapeutic interest. To reduce off-target effects, tools for conditional control of CRISPR-Cas9 functions are under active research, such as stimuli-responsive guide RNA (gRNA). However, the types of physiologically relevant stimuli that can trigger gRNA are largely limited due to the lack of a versatile synthetic approach in chemistry to introduce diverse labile modifications into gRNA. In this work, we developed such a general method to prepare stimuli-responsive gRNA based on site-specific derivatization of 2′-O-methylribonucleotide phosphorothioate (PS-2′-OMe). We demonstrated CRISPR-Cas9-mediated gene editing in human cells triggered by oxidative stress and visible light, respectively. Our study tackles the synthetic challenge and paves the way for chemically modified RNA to play more active roles in gene therapy. Conditional control of CRISPR-Cas9 activity by reactive oxygen species and visible light is achieved using stimuli-responsive guide RNA synthesized by a general method based on RNA 2′-O-methylribonucleotide phosphorothioate.![]()
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Affiliation(s)
- Chunmei Gu
- Department of Chemistry, Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Tsinghua University Beijing 100084 China
| | - Lu Xiao
- Department of Chemistry, Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Tsinghua University Beijing 100084 China
| | - Jiachen Shang
- Department of Chemistry, Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Tsinghua University Beijing 100084 China
| | - Xiao Xu
- Department of Chemistry, Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Tsinghua University Beijing 100084 China
| | - Luo He
- Department of Chemistry, Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Tsinghua University Beijing 100084 China
| | - Yu Xiang
- Department of Chemistry, Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Tsinghua University Beijing 100084 China
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6
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Nan Y, Gu Y, Liu Z, Zhou Q, Zhao W, Xu W. Versatile quantitative biopsy: an approach for cost-effective detection of hydrogen peroxide in tissue specimens. NEW J CHEM 2021. [DOI: 10.1039/d0nj05569g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the presence of H2O2, the amylose released by the micelles is converted into glucose by glucoamylase and detected by a PGM.
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Affiliation(s)
- Yanxia Nan
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- China
| | - Yu Gu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- China
| | - Zhen Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- China
| | - Qiulan Zhou
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- China
| | - Wenjie Zhao
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot
- China
| | - Weijian Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- China
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7
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Kilic-Toprak E, Toprak I, Caliskan S, Ozdemir Y, Demirtas O, Altintas F, Kucukatay V. Oxidative Stress and Genotoxicity in Pterygium: A Systemic Investigation. Eye Contact Lens 2019; 45:399-404. [DOI: 10.1097/icl.0000000000000620] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Systemic oxidative stress in non-arteritic anterior ischemic optic neuropathy. Eye (Lond) 2019; 33:1140-1144. [PMID: 30833666 DOI: 10.1038/s41433-019-0388-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 01/22/2019] [Accepted: 02/12/2019] [Indexed: 11/08/2022] Open
Abstract
PURPOSE To investigate whether the serum total oxidant status (TOS), total antioxidant status (TAS), advanced oxidation protein products (AOPP), and thiol parameters could play a role in the pathogenesis of non-arteritic anterior ischemic optic neuropathy (NA-AION). METHODS In this study, 18 newly diagnosed NA-AION patients and 17 healthy subjects (control group) were included. Serum plasma TOS and TAS, AOPP, and thiol parameters were measured by spectrophotometric method and the results were compared. RESULTS Mean age of the patients and the controls were 60.8 ± 8.4 and 61.9 ± 9.4 years, respectively (p = 0.729). There were no significant differences between the patients and the control group with regard to the values of TAS, TOS, AOPP, and thiol (p = 0.869, p = 0.863, p = 0.040, p = 0.314; respectively). There was a positive correlation between TOS and thiol (p = 0.002, r = 0.681). CONCLUSION We found no significant relationship between systemic oxidative parameters and NA-AION. However, this study should be accepted as a pilot investigation and needs to be validated.
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9
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Kilic-Toprak E, Unver F, Kilic-Erkek O, Korkmaz H, Ozdemir Y, Oymak B, Oskay A, Bor-Kucukatay M. Increased erythrocyte aggregation following an acute bout of eccentric isokinetic exercise does not exceed two days. Biorheology 2018; 55:15-24. [DOI: 10.3233/bir-180175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Emine Kilic-Toprak
- Pamukkale University, Faculty of Medicine, Department of Physiology, , , Turkey
| | | | - Ozgen Kilic-Erkek
- Pamukkale University, Faculty of Medicine, Department of Physiology, , , Turkey
| | | | - Yasin Ozdemir
- Pamukkale University, Faculty of Medicine, Department of Physiology, , , Turkey
| | - Burak Oymak
- Pamukkale University, Faculty of Medicine, Department of Physiology, , , Turkey
| | | | - Melek Bor-Kucukatay
- Pamukkale University, Faculty of Medicine, Department of Physiology, , , Turkey
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10
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Zhao W, Yang S, Yang J, Li J, Zheng J, Qing Z, Yang R. Visual Biopsy by Hydrogen Peroxide-Induced Signal Amplification. Anal Chem 2016; 88:10728-10735. [DOI: 10.1021/acs.analchem.6b03330] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Wenjie Zhao
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, and Collaborative Innovation Center for
Chemistry and Molecular Medicine, Hunan University, Changsha, 410082, People’s Republic of China
| | - Sheng Yang
- School
of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, 410114, People’s Republic of China
| | - Jinfeng Yang
- The
Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410011, People’s Republic of China
| | - Jishan Li
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, and Collaborative Innovation Center for
Chemistry and Molecular Medicine, Hunan University, Changsha, 410082, People’s Republic of China
| | - Jing Zheng
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, and Collaborative Innovation Center for
Chemistry and Molecular Medicine, Hunan University, Changsha, 410082, People’s Republic of China
| | - Zhihe Qing
- School
of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, 410114, People’s Republic of China
| | - Ronghua Yang
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, and Collaborative Innovation Center for
Chemistry and Molecular Medicine, Hunan University, Changsha, 410082, People’s Republic of China
- School
of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, 410114, People’s Republic of China
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11
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Abdellatef AA, Khalil AA. Ameliorated effects of Lactobacillus delbrueckii subsp. lactis DSM 20076 and Pediococcus acidilactici NNRL B-5627 on Fumonisin B1-induced Hepatotoxicity and Nephrotoxicity in rats. Asian J Pharm Sci 2016. [DOI: 10.1016/j.ajps.2016.02.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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12
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Zhou Y, Pei W, Zhang X, Chen W, Wu J, Yao C, Huang L, Zhang H, Huang W, Chye Loo JS, Zhang Q. A cyanine-modified upconversion nanoprobe for NIR-excited imaging of endogenous hydrogen peroxide signaling in vivo. Biomaterials 2015; 54:34-43. [PMID: 25907037 DOI: 10.1016/j.biomaterials.2015.03.003] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 02/27/2015] [Accepted: 03/04/2015] [Indexed: 11/25/2022]
Abstract
Endogenous hydrogen peroxide is an important parameter associated with cellular signal transduction and homeostasis. However, abnormal H2O2 regulation in live systems has been implicated in many pathological conditions. Monitoring this signal in live systems is essential but challenging because current H2O2 probes are impractical for efficient bio-imaging due to UV/visible light as the excitation source. We herein present a novel design based on an organic fluorophore-attached lanthanide-doped upconversion nanoprobe (CYD1-UCNPs) for selective UCL detection of H2O2. This nanoprobe represents the next-generation imaging tool that features a robust UCL "turn-on" response to H2O2 with NIR-excited ratiometric signals and has potential applications in ratiometric UCL imaging of endogenous H2O2 generating in living cells and whole-body animals.
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Affiliation(s)
- Yi Zhou
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Wenbo Pei
- Institute of Advanced Materials (IAM) and Jiangsu-Singapore Joint Research Center for Organic/Bio-Electronics & Information Displays, Nanjing Tech University (NanjingTech), Nanjing 211816, China
| | - Xiao Zhang
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Wangqiao Chen
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Jiansheng Wu
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Cheng Yao
- College of Science, Nanjing Tech University (NanjingTech), Nanjing 211816, China
| | - Ling Huang
- Institute of Advanced Materials (IAM) and Jiangsu-Singapore Joint Research Center for Organic/Bio-Electronics & Information Displays, Nanjing Tech University (NanjingTech), Nanjing 211816, China
| | - Hua Zhang
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Wei Huang
- Institute of Advanced Materials (IAM) and Jiangsu-Singapore Joint Research Center for Organic/Bio-Electronics & Information Displays, Nanjing Tech University (NanjingTech), Nanjing 211816, China
| | - Joachim Say Chye Loo
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore; Singapore Centre on Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, 637551, Singapore.
| | - Qichun Zhang
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore; Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
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13
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Joshi-Barr S, de Gracia Lux C, Mahmoud E, Almutairi A. Exploiting oxidative microenvironments in the body as triggers for drug delivery systems. Antioxid Redox Signal 2014; 21:730-54. [PMID: 24328819 PMCID: PMC4098119 DOI: 10.1089/ars.2013.5754] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
SIGNIFICANCE Reactive oxygen species and reactive nitrogen species (ROS/RNS) play an important role in cell signaling pathways. However, the increased production of these species may disrupt cellular homeostasis, giving rise to pathological conditions. Biomaterials that are responsive to ROS/RNS can be strategically used to specifically release therapeutics and diagnostic agents to regions undergoing oxidative stress. RECENT ADVANCES Many nanocarriers intended to exploit redox micro-environments as triggers for drug release, summarized and compared in this review, have recently been developed. We describe these carriers' chemical structures, strategies for payload protection and oxidation-selective release, and ROS/RNS sensitivity as tested in initial studies. CRITICAL ISSUES ROS/RNS are unstable, so reliable measures of their concentrations in various conditions are scarce. Combined with the dearth of materials shown to respond to physiologically relevant levels of ROS/RNS, evaluations of their true sensitivity are difficult. FUTURE DIRECTIONS Oxidation-responsive nanocarriers developed thus far show tremendous potential for applicability in vivo; however, the sensitivity of these chemistries needs to be fine tuned to enable responses to physiological levels of ROS and RNS.
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Affiliation(s)
- Shivanjali Joshi-Barr
- 1 Skaggs School of Pharmacy and Pharmaceutical Sciences, Laboratory of Bioresponsive Materials, University of California , San Diego, San Diego, California
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14
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Evaluation of assays for measurement of serum (anti)oxidants in hemodialysis patients. BIOMED RESEARCH INTERNATIONAL 2014; 2014:843157. [PMID: 24982909 PMCID: PMC4055181 DOI: 10.1155/2014/843157] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 04/24/2014] [Accepted: 05/05/2014] [Indexed: 01/17/2023]
Abstract
Background. Various biomarkers and assays have been used for assessment of (anti)oxidant status in hemodialysis patients, including those intended for measurement of serum total (anti)oxidants, most often as a part of panel biomarkers. Methods. Serum (anti)oxidant status was measured in 32 chronically hemodialyzed patients and in 47 healthy persons, using two oxidations and three antioxidant assays. Results. The patients before the hemodialysis session have had higher values of total oxidants in comparison to the healthy persons, with a further increase during the hemodialysis. These findings were confirmed with both oxidation assays, but they differ in the percentage of increase and the statistical significance. All three antioxidant assays showed significantly higher values of the total serum antioxidants in the patients before the hemodialysis session in comparison to the healthy persons, and their significant decrease during the hemodialysis. However, the assays differ in the percentage of decrease, its statistical significance, and the correlations with uric acid. Conclusion. The variability of results of total (anti)oxidants which are obtained using different assays should be taken into account when interpreting data from clinical studies of oxidative stress, especially in complex pathologies such as chronic hemodialysis.
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15
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Weinstain R, Savariar EN, Felsen CN, Tsien RY. In vivo targeting of hydrogen peroxide by activatable cell-penetrating peptides. J Am Chem Soc 2014; 136:874-7. [PMID: 24377760 PMCID: PMC3929323 DOI: 10.1021/ja411547j] [Citation(s) in RCA: 181] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A hydrogen peroxide (H2O2)-activated cell-penetrating peptide was developed through incorporation of a boronic acid-containing cleavable linker between polycationic cell-penetrating peptide and polyanionic fragments. Fluorescence labeling of the two ends of the molecule enabled monitoring its reaction with H2O2 through release of the highly adhesive cell-penetrating peptide and disruption of fluorescence resonance energy transfer. The H2O2 sensor selectively reacts with endogenous H2O2 in cell culture to monitor the oxidative burst of promyelocytes and in vivo to image lung inflammation. Targeting H2O2 has potential applications in imaging and therapy of diseases related to oxidative stress.
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Affiliation(s)
- Roy Weinstain
- Department of Pharmacology, ‡Department of Chemistry and Biochemistry, and §Howard Hughes Medical Institute, University of California San Diego , La Jolla, California 92093, United States
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16
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Increased systemic oxidative stress in patients with keratoconus. Eye (Lond) 2013; 28:285-9. [PMID: 24310241 DOI: 10.1038/eye.2013.262] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Accepted: 10/11/2013] [Indexed: 02/07/2023] Open
Abstract
PURPOSE To establish the effect of systemic oxidative stress on the pathogenesis of keratoconus by measuring serum total oxidant status (TOS) and total antioxidant status (TAS) in patients with keratoconus. METHODS Twenty-five patients with keratoconus (keratoconus group) and 25 age-sex-matched healthy subjects (control group) were enrolled in the study. Exclusion criteria were smoking habit, history of any other corneal pathology, systemic disease or inflammation, and current antioxidant or anti-inflammatory therapies. All participants underwent a detailed ophthalmological examination and corneal topography. Serum samples were obtained from all participants. Oxidative stress markers (TAS and TOS) were measured using a commercial kit and oxidative stress index (OSI) was calculated. RESULTS The study comprised 25 patients with keratoconus (mean age of 26.4±1.7 years) and 25 healthy control subjects (mean age of 26.6±1.7 years) (P>0.05). The serum TOS and OSI values were significantly higher in patients with keratoconus compared with those of the controls (P=0.036 and 0.037, respectively). However, serum TAS did not show significant difference between the keratoconus and control groups (P=0.497). CONCLUSIONS The higher levels of serum oxidant status and OSI in patients with keratoconus suggest that systemic oxidative stress might be involved in the pathogenesis of keratoconus.
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Kaur S, Zilmer K, Leping V, Zilmer M. Serum methylglyoxal level and its association with oxidative stress and disease severity in patients with psoriasis. Arch Dermatol Res 2013; 305:489-94. [PMID: 23636352 DOI: 10.1007/s00403-013-1362-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 04/18/2013] [Accepted: 04/22/2013] [Indexed: 02/06/2023]
Abstract
Psoriasis vulgaris (PV), a chronic inflammatory skin disease, is a condition of increased oxidative stress (OxS). However, interest related to oxidative and carbonyl stress damages to proteins, such as the formation of advanced glycation end products (AGEs) and their precursor molecule methylglyoxal (MG) has been modest. The objective of this study was to compare the systemic levels of OxS markers in patients with PV and healthy controls (Co) and to investigate their correlation with the serum level of MG. Total peroxide concentration (TPX) and total antioxidant capacity (TAC) were estimated by means of spectrophotometry. The TPX and TAC ratio was regarded as OxS index (OSI). MG level was determined using ELISA. Compared to Co, patients with PV had significantly increased blood levels of TPX (P < 0.0001), OSI (P < 0.0001), and MG (P = 0.01), and lower TAC levels (P < 0.0001). Increase in body mass index (BMI) appeared to contribute to this imbalance as TAC levels decreased with increasing BMI (r = -0.252, P < 0.01). Increased TPX concentration was associated with higher serum level of MG (r = 0.610, P = 0.004), the latter being positively correlated with psoriasis area and severity index (r = 0.577, P = 0.008). In performed multivariate regression analysis, TPX, TAC, and OSI were all significant predictors of MG level. Our study gave further proof of increased systemic psoriasis-related OxS. MG serum level, reflecting simultaneously OxS as well as carbonyl stress status, could be used as a marker of disease activity in clinical trials while looking for new systemic therapies for psoriasis.
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Affiliation(s)
- Sirje Kaur
- Clinic of Dermatology, University of Tartu, 31 Raja St, 50417, Tartu, Estonia.
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Burgoyne JR, Oka SI, Ale-Agha N, Eaton P. Hydrogen peroxide sensing and signaling by protein kinases in the cardiovascular system. Antioxid Redox Signal 2013; 18:1042-52. [PMID: 22867279 PMCID: PMC3567777 DOI: 10.1089/ars.2012.4817] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
SIGNIFICANCE Oxidants were once principally considered perpetrators of injury and disease. However, this has become an antiquated view, with cumulative evidence showing that the oxidant hydrogen peroxide serves as a signaling molecule. Hydrogen peroxide carries vital information about the redox state of the cell and is crucial for homeostatic regulation during health and adaptation to stress. RECENT ADVANCES In this review, we examine the contemporary concepts for how hydrogen peroxide is sensed and transduced into a biological response by introducing post-translational oxidative modifications on select proteins. Oxidant sensing and signaling by kinases are of particular importance as they integrate oxidant signals into phospho-regulated pathways. We focus on CAMKII, PKA, and PKG, kinases whose redox regulation has notable impact on cardiovascular function. CRITICAL ISSUES In addition, we examine the mechanism for regulating intracellular hydrogen peroxide, considering the net concentrations that may accumulate. The effects of endogenously generated oxidants are often modeled by applying exogenous hydrogen peroxide to cells or tissues. Here we consider whether model systems exposed to exogenous hydrogen peroxide have relevance to systems where the oxidant is generated endogenously, and if so, what concentration can be justified in terms of relevance to health and disease. FUTURE DIRECTIONS Improving our understanding of hydrogen peroxide signaling and the sensor proteins that it can modify will help us develop new strategies to regulate intracellular signaling to prevent disease.
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Affiliation(s)
- Joseph R Burgoyne
- Department of Cardiology, King's College London, The Rayne Institute, St. Thomas' Hospital, London, UK
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Velthut A, Zilmer M, Zilmer K, Kaart T, Karro H, Salumets A. Elevated blood plasma antioxidant status is favourable for achieving IVF/ICSI pregnancy. Reprod Biomed Online 2013; 26:345-52. [PMID: 23415995 DOI: 10.1016/j.rbmo.2012.12.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 11/22/2012] [Accepted: 12/19/2012] [Indexed: 11/17/2022]
Abstract
The aim of the study was to determine the roles of intrafollicular and systemic oxidative stress and antioxidant response in ovarian stimulation and intracytoplasmic sperm injection (ICSI) outcomes. For this purpose, 102 ICSI patients undergoing controlled ovarian stimulation were enrolled and samples were collected on the day of follicle puncture. Total peroxide (TPX) concentrations and total antioxidant response (TAR) were measured in follicular fluid and blood plasma, and an oxidative stress index (OSI) was calculated based on these two parameters. Urinary concentrations of 8-iso-prostaglandin F2a (F2IsoP) were measured. Elevated intrafollicular oxidative stress was positively correlated with ovarian stimulation outcome: less FSH per retrieved oocyte was used, more oocytes were collected and higher serum oestradiol concentrations were measured in patients with higher follicular OSI. However, high urinary F2IsoP related to lower embryo quality and F2IsoP was also elevated in smoking patients. Patients with endometriosis had lower follicular antioxidant status. Most importantly, higher systemic blood TAR was significantly favourable for achieving clinical pregnancy (P=0.03). In conclusion, the findings suggest clear associations between oxidative stress, antioxidant status and several aspects of ovarian stimulation and IVF/ICSI outcome, including pregnancy rate. Several oxygen-dependent biochemical reactions produce reactive oxygen species as by-products that may eventually lead to oxidative stress, which is detrimental to cells and tissues. Total antioxidant status, on the other hand, comprises several agents that balance the excess of these reactive oxygen species and reduce potential damage to the body. The aim of the current work was to study this balance in 102 patients participating in an ICSI programme and to examine the degree to which total peroxide content and antioxidant status influence infertility and pregnancy outcome. During the study, several tests were performed to characterize oxidative stress levels in ovarian follicular fluid, blood plasma and urine. We found a significantly higher oxidative stress environment in the ovary when compared with blood plasma. This suggests a prominent role of oxidative stress in the ovaries of these patients. The elevated oxidative stress levels were correlated to a higher number of oocytes that could be obtained via the procedure and to a lower amount of FSH needed to mature the oocytes, suggesting that oxidative stress, to some degree, is favourable for hormone stimulation outcome. A high level of lipid peroxidation products in the urine, another marker of oxidative stress, was observed in smokers and this marker was elevated in patients with embryos that had lower developmental potential. A higher overall antioxidant status in blood plasma was advantageous for achieving pregnancy.
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Affiliation(s)
- Agne Velthut
- Centre for Biology of Integrated Systems, Tallinn University of Technology, Tallinn, Estonia.
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Aykanat B, Demircigil GC, Fidan K, Buyan N, Gulleroglu K, Baskin E, Bayrakci US, Sepici A, Buyukkaragoz B, Karakayali H, Haberal M, Burgaz S. Basal damage and oxidative DNA damage in children with chronic kidney disease measured by use of the comet assay. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2011; 725:22-8. [DOI: 10.1016/j.mrgentox.2011.07.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Revised: 05/21/2011] [Accepted: 06/22/2011] [Indexed: 11/17/2022]
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Karsen H, Sunnetcioglu M, Ceylan RM, Bayraktar M, Taskin A, Aksoy N, Erten R. Evaluation of oxidative status in patients with Fasciola hepatica infection. Afr Health Sci 2011; 11 Suppl 1:S14-8. [PMID: 22135637 DOI: 10.4314/ahs.v11i3.70064] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND F. hepatica infection is rare and mostly subclinical. Migration of juvenile forms of F. hepatica into the host's liver is accompanied by an inflammatory reaction followed by fibrosis and cirrhosis. OBJECTIVE The aim of this study was to evaluate oxidative status by using a novel automated method in patients with Fasciola hepatica. METHODS Twenty two patients with a diagnosis of F. hepatica and 26 healthy volunteers were enrolled in the study. Their Total antioxidant capacity status (TAC), total oxidant status (TOS) and catalase were measured in them and oxidative stress index (OSI) was calculated. These measurements were also taken for the control group and the values were compared. RESULTS Plasma levels of total TOS and OSI were significantly increased in patients as compared with healthy controls (P<0.001, P<0.001, P=0.001, P=0.008) respectively. In contrast, TAC level was significantly lower in patients as compared with controls (p<0.05). There was no significant difference between the catalase results of the two groups (p>0.05). CONCLUSION Total oxidative status and OSI were increased and total antioxidative status capacity was decreased in patients with F. hepatica infection. A high oxidative stress occurs during F. hepatica infection, which may cause severe damage in both the liver.
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Cakmak Demircigil G, Aykanat B, Fidan K, Gulleroglu K, Bayrakci US, Sepici A, Buyukkaragoz B, Karakayali H, Haberal M, Baskin E, Buyan N, Burgaz S. Micronucleus frequencies in peripheral blood lymphocytes of children with chronic kidney disease. Mutagenesis 2011; 26:643-50. [DOI: 10.1093/mutage/ger027] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Popovic-Dragonjic L, Jovanovic M, Vrbic M, Konstantinovic L, Kostic V, Dragonjic I. Antioxidant defense and oxidative stress in children with acute hepatitis A. Ann Saudi Med 2011; 31:258-62. [PMID: 21623054 PMCID: PMC3119965 DOI: 10.4103/0256-4947.81538] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Published data on oxidative stress in children with acute hepatitis A are still very scarce. This study aims to evaluate the oxidant/antioxidant status of these patients. DESIGN AND SETTING Prospective, case-control study, over 2.5 years in patients under hospitalized and ambulatory care. PATIENTS AND METHODS The levels of a whole-blood antioxidant, reduced glutathione; and plasma antioxidants, β-carotene, retinol, ascorbic acid, α-tocopherol; and the biomarker of oxidative stress, malondialdehyde, were evaluated in 50 pediatric patients (age range, 5-16 years; 29 males and 21 females) with acute hepatitis A and in 50 healthy children as control subjects (age range, 5-16 years; 25 males and 25 females). RESULTS Plasma levels of reduced glutathione, β-carotene, retinol, α-tocopherol and ascorbic acid were significantly lower, while malondialdehyde plasma levels were significantly increased in the patient group when compared to the controls (P<.0001 for all parameters). CONCLUSIONS Our findings show that pediatric patients with acute hepatitis A were influenced by oxidative stress, resulting in significantly lower levels of plasma antioxidants and increased lipid peroxidation. In the absence of other therapeutic options, antioxidant vitamin supplements could be added to the therapy for these patients to help reestablish the oxidant status balance. Further investigations to confirm this suggestion are recommended.
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Karaagac L, Koruk ST, Koruk I, Aksoy N. Decreasing oxidative stress in response to treatment in patients with brucellosis: could it be used to monitor treatment? Int J Infect Dis 2011; 15:e346-9. [PMID: 21376649 DOI: 10.1016/j.ijid.2011.01.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 12/29/2010] [Accepted: 01/27/2011] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVES The aims of this study were to evaluate oxidant and antioxidant status in patients with acute brucellosis before and after therapy, and to determine whether this index could be used to monitor the treatment of brucellosis. METHODS Thirty patients with a diagnosis of acute brucellosis and 37 healthy volunteers were enrolled in the study. Total antioxidant status (TAS) and total oxidant status (TOS) were measured in patients before and after therapy, and an oxidative stress index (OSI) was calculated. These measurements were also taken for the healthy control group and the values were compared. RESULTS Plasma levels of TOS and OSI were significantly higher in patients with brucellosis before therapy as compared to the treated group (t: 11.19, p<0.000 and t: 9.91, p<0.000, respectively). After treatment, TOS and OSI levels were lower, whereas in contrast, TAS levels were significantly higher (t: -4.17, p<0.000). TOS and OSI levels were found to be significantly higher in the patients before treatment than in the control group (t: 15.01, p<0.000 and t: 15.00, p<0.000, respectively). TAS levels in patients before treatment were lower than in the controls and the difference was significant (t: -8.03, p<0.000). TOS and OSI levels were significantly higher in the treated group than in the control group (t: 4.58, p<0.000 and t: 9.91, p<0.000, respectively). TAS levels in the treated group were lower than in the control group and the difference was significant (t: -3.02, p<0.004). CONCLUSION Reduced TAS capacity and elevated TOS levels may lead to considerable oxidative stress in brucellosis. Increased oxidative stress may cause severe oxidative damage in the body, and even though this damage ameliorates considerably with 6weeks of treatment, normal healthy levels are not attained. In addition, it appears possible that these oxidant and antioxidant parameters could be used to monitor treatment.
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Affiliation(s)
- Leman Karaagac
- Infectious Diseases and Clinical Microbiology Department, Faculty of Medicine, Harran University, Yenisehir Campus, 63100 Sanliurfa, Turkey
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Yoon JH, Lee MS, Kang JH. Reaction of ferritin with hydrogen peroxide induces lipid peroxidation. BMB Rep 2010; 43:219-24. [PMID: 20356464 DOI: 10.5483/bmbrep.2010.43.3.219] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Lipid peroxidation is known to be an important factor in the pathologies of many diseases associated with oxidative stress. We assessed the lipid peroxidation induced by the reaction of ferritin with H2O2. When linoleic acid micelles or phosphatidyl choline liposomes were incubated with ferritin and H2O2, lipid peroxidation increased in the presence of ferritin and H2O2 in a concentration-dependent manner. The hydroxyl radical scavengers, azide and thiourea, prevented lipid peroxidation induced by the ferritin/H2O2 system. The iron specific chelator desferoxamine also prevented ferritin/H2O2 systemmediated lipid peroxidation. These results demonstrate the possible role of iron in ferritin/H2O2 system-mediated lipid peroxidation. Carnosine is involved in many cellular defense processes, including free radical detoxification. In this study, carnosine, homocarnosine, and anserine were shown to significantly prevent ferritin/H2O2 system-mediated lipid peroxidation and also inhibited the free radical-generation activity of ferritin. These results indicated that carnosine and related compounds may prevent ferritin/H2O2 system-mediated lipid peroxidation via free radical scavenging.
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Affiliation(s)
- Jung Hwan Yoon
- Department of Genetic Engineering, Cheongju University, Cheongju 360-764, Korea
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26
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Sütt S, Raud S, Abramov U, Innos J, Luuk H, Plaas M, Kõks S, Zilmer K, Mahlapuu R, Zilmer M, Vasar E. Relation of exploratory behaviour to plasma corticosterone and Wfs1 gene expression in Wistar rats. J Psychopharmacol 2010; 24:905-13. [PMID: 19346280 DOI: 10.1177/0269881109102738] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Male Wistar rats exhibit significant variations in exploratory behaviour in the elevated plus-maze (EPM) model of anxiety. We have now investigated the relation between exploratory behaviour and levels of corticosterone and systemic oxidative stress. Also, the expression levels of endocannabinoid-related and wolframin (Wfs1) genes were measured in the forebrain structures. The rats were divided into high, intermediate and low exploratory activity groups. Exposure to EPM significantly elevated the serum levels of corticosterone in all rats, but especially in the high exploratory group. Oxidative stress indices and expression of endocannabinoid-related genes were not significantly affected by exposure to EPM. Wfs1 mRNA level was highly dependent on exploratory behaviour of animals. In low exploratory activity rats, Wfs1 gene expression was reduced in the temporal lobe, whereas in high exploratory activity group it was reduced in the mesolimbic area and hippocampus. Altogether, present study indicates that in high exploratory activity rats, the activation of brain areas related to novelty seeking is apparent, whereas in low exploratory activity group the brain structures linked to anxiety are activated.
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Affiliation(s)
- S Sütt
- Department of Physiology, Biomedicum, University of Tartu, Tartu, Estonia
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Bitiren M, Musa D, Ozgonul A, Ozaslan M, Kocyigit A, . OS, E. Guldur M, Kilic I, Karakilcik AZ, Zerin M. Protective Effects of Green tea (Camelia sinensis), Hypericum perforatum and Urtica dioica on Hepatic Injury and Lymphocyte DNA Damage Induced by Carbon Tetrachloride in Wistar Rats. INT J PHARMACOL 2010. [DOI: 10.3923/ijp.2010.241.248] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Salum T, Kõks S, Kairane C, Mahlapuu R, Zilmer M, Vasar E. Temperature Dependence of the Sodium Pump is Altered in the Cerebral Cortex of CCK2 Receptor-Deficient Mice. Neurochem Res 2010; 35:688-92. [DOI: 10.1007/s11064-009-0119-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/29/2009] [Indexed: 11/28/2022]
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Arsov S, Graaff R, Morariu AM, van Oeveren W, Smit AJ, Busletic I, Trajcevska L, Selim G, Dzekova P, Stegmayr B, Sikole A, Rakhorst G. Does hepatitis C increase the accumulation of advanced glycation end products in haemodialysis patients? Nephrol Dial Transplant 2009; 25:885-91. [DOI: 10.1093/ndt/gfp564] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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Ersoy MA, Selek S, Celik H, Erel O, Kaya MC, Savas HA, Herken H. Role of Oxidative and Antioxidative Parameters in Etiopathogenesis and Prognosis of Panic Disorder. Int J Neurosci 2009; 118:1025-37. [DOI: 10.1080/00207450701769026] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Pawlak K, Zolbach K, Borawski J, Mysliwiec M, Kovalchuk O, Chyczewski L, Pawlak D. Chronic viral hepatitis C, oxidative stress and the coagulation/fibrinolysis system in haemodialysis patients. Thromb Res 2008; 123:166-70. [PMID: 18452978 DOI: 10.1016/j.thromres.2008.02.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2007] [Revised: 02/18/2008] [Accepted: 02/18/2008] [Indexed: 01/04/2023]
Abstract
INTRODUCTION The aim of the present study was to establish whether the presence of chronic viral hepatitis (PVH) could be implicated in the elevation of oxidative stress (SOX) and haemostasis system in haemodialysis (HD) patients. MATERIALS AND METHODS In HD patients with and without PVH and in controls we compared the markers of: coagulation pathway- tissue factor (TF) and its inhibitor (TFPI), prothrombin fragment F (1+2) (F (1+2)); fibrinolysis: tissue-type plasminogen activator (tPA), urokinase-type plasminogen activator (uPA) and its soluble receptor (suPAR), plasminogen activator inhibitor 1 (PAI-1), plasmin/antiplasmin complexes (PAP); and a marker of SOX-Cu/Zn superoxide dismutase (Cu/Zn SOD) levels. RESULTS Patients, particularly those with PVH, showed a significant increase in the markers of the coagulation, fibrinolysis and oxidative status as compared to controls. All parameters of coagulation/fibrinolysis system were directly associated with the PVH and Cu/Zn SOD levels, and there was a relationship between the PVH and Cu/Zn SOD levels. Multivariable analysis showed that PVH and increased SOX were identified as independent variables significantly associated with the disturbances of coagulation/fibrinolysis system in these patients. CONCLUSIONS We concluded that PVH is a novel determinant of the increased oxidative stress as well as the disturbances of coagulation/fibrinolysis system in haemodialysis patients.
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Affiliation(s)
- Krystyna Pawlak
- Department of Monitored Pharmacotherapy, Medical University, Bialystok, Poland.
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Horoz M, Aslan M, Selek S, Koylu AO, Bolukbas C, Bolukbas FF, Celik H, Erel O. PON1 status in haemodialysis patients and the impact of hepatitis C infection. Clin Biochem 2007; 40:609-14. [PMID: 17335792 DOI: 10.1016/j.clinbiochem.2007.01.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2006] [Revised: 01/19/2007] [Accepted: 01/25/2007] [Indexed: 10/23/2022]
Abstract
OBJECTIVES Paraoxonase-1 (PON1) activity has been reported to decrease in both haemodialysis patients and patients with HCV infection. We aimed to investigate paraoxonase and arylesterase activities, and lipid hydroperoxide levels (LOOH) in haemodialysis patients with or without hepatitis C infection, and to find out whether PON1 activity is affected further by the presence of HCV infection in HD patients. DESIGN AND METHODS Twenty HCV (+) haemodialysis patients, 26 HCV (-) haemodialysis patients, and 26 controls were enrolled. Paraoxonase and arylesterase activities were measured spectrophotometrically. LOOH levels were measured by ferrous oxidation with xylenol orange assay. RESULTS Haemodialysis patients with or without HCV infection had lower paraoxonase and arylesterase activities than controls (all p<0.001), while higher LOOH levels (both p<0.001). Paraoxonase and arylesterase activities, and LOOH levels were comparable between haemodialysis patients with or without HCV infection (p>0.05). Significant inverse correlation was observed between paraoxonase or arylesterase activities, and LOOH levels (p<0.05, beta=-0.319 and p<0.05, beta=-0.348, respectively). CONCLUSION We concluded that PON1 activity significantly decreases in both haemodialysis patients with or without HCV infection. Nevertheless, PON1 activity is not affected further by the presence of HCV infection in haemodialysis patients.
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Affiliation(s)
- Mehmet Horoz
- Harran University School of Medicine, Department of Internal Medicine, Sanliurfa, Turkey.
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Aslan M, Horoz M, Nazligul Y, Bolukbas C, Bolukbas FF, Selek S, Celik H, Erel O. Insulin resistance in H pylori infection and its association with oxidative stress. World J Gastroenterol 2006; 12:6865-8. [PMID: 17106938 PMCID: PMC4087444 DOI: 10.3748/wjg.v12.i42.6865] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To determine the insulin resistance (IR) and oxidative status in H pylori infection and to find out if there is any relationship between these parameters and insulin resistance.
METHODS: Fifty-five H pylori positive and 48 H pylori negative patients were enrolled. The homeostasis model assessment (HOMA) was used to assess insulin resistance. Serum total antioxidant capacity (TAC), total oxidant status (TOS) and oxidative stress index (OSI) were determined in all subjects.
RESULTS: The total antioxidant capacity was significantly lower in H pylori positive group than in H pylori negative group (1.36 ± 0.33 and 1.70 ± 0.50, respectively; P < 0.001), while the total oxidant status and oxidative stress index were significantly higher in H pylori positive group than in H pylori negative group (6.79 ± 3.40 and 5.08 ± 0.95, and 5.42 ± 3.40 and 3.10 ± 0.92, respectively; P < 0.001). Insulin resistance was significantly higher in H pylori positive group than in H pylori negative group (6.92 ± 3.86 and 3.61 ± 1.67, respectively; P < 0.001). Insulin resistance was found to be significantly correlated with total antioxidant capacity (r = -0.251, P < 0.05), total oxidant status (r = 0.365, P < 0.05), and oxidative stress index (r = 0.267, P < 0.05).
CONCLUSION: Insulin resistance seems to be associated with increased oxidative stress in H pylori infection. Further studies are needed to clarify the mechanisms underlying this association and elucidate the effect of adding antioxidant vitamins to H pylori eradication therapy on insulin resistance during H pylori infection.
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Affiliation(s)
- Mehmet Aslan
- Department of Internal Medicine, Faculty of Medicine, Harran University, Bahcelievler Mah, Sema Apt A, Blok No. 8, Sanliurfa 63200, Turkey.
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