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Ferenc K, Marcinkowski M, Olszewski J, Kowalczyk P, Pilžys T, Garbicz D, Dib N, Świderska B, Matyba P, Gajewski Z, Grzesiuk E, Zabielski R. The proteomic profile is altered but not repaired after bariatric surgery in type 2 diabetes pigs. Sci Rep 2024; 14:10235. [PMID: 38702370 PMCID: PMC11068747 DOI: 10.1038/s41598-024-60022-9] [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: 11/14/2023] [Accepted: 04/17/2024] [Indexed: 05/06/2024] Open
Abstract
To reveal the sources of obesity and type 2 diabetes (T2D) in humans, animal models, mainly rodents, have been used. Here, we propose a pig model of T2D. Weaned piglets were fed high fat/high sugar diet suppling 150% of metabolizable energy. Measurements of weight gain, blood morphology, glucose plasma levels, cholesterol, and triglycerides, as well as glucose tolerance (oral glucose tolerance test, OGTT) were employed to observe T2D development. The histology and mass spectrometry analyses were made post mortem. Within 6 months, the high fat-high sugar (HFHS) fed pigs showed gradual and significant increase in plasma triglycerides and glucose levels in comparison to the controls. Using OGTT test, we found stable glucose intolerance in 10 out of 14 HFHS pigs. Mass spectrometry analysis indicated significant changes in 330 proteins in the intestine, liver, and pancreas of the HFHS pigs. These pigs showed also an increase in DNA base modifications and elevated level of the ALKBH proteins in the tissues. Six diabetic HFHS pigs underwent Scopinaro bariatric surgery restoring glycaemia one month after surgery. In conclusion, a high energy diet applied to piglets resulted in the development of hyperlipidaemia, hyperglycaemia, and type 2 diabetes being reversed by a bariatric procedure, excluding the proteomic profile utill one month after the surgery.
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Affiliation(s)
- Karolina Ferenc
- Center for Translational Medicine, Warsaw University of Life Sciences, Nowoursynowska 100, 02-797, Warsaw, Poland
| | - Michał Marcinkowski
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Pawińskiego 5a, 02-106, Warsaw, Poland
| | - Jarosław Olszewski
- Center for Translational Medicine, Warsaw University of Life Sciences, Nowoursynowska 100, 02-797, Warsaw, Poland
| | - Paweł Kowalczyk
- Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, Instytucka 3, 05-110, Jabłonna, Poland
| | - Tomaš Pilžys
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106, Warsaw, Poland
| | - Damian Garbicz
- Institute of Oncology, Maria Sklodowska-Curie National Research, W.K. Roentgena 5, 02-781, Warsaw, Poland
| | - Naser Dib
- European Health Centre Otwock (ECZ Otwock), The Fryderyk Chopin Hospital, Borowa 14/18, 05-400, Otwock, Poland
| | - Bianka Świderska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106, Warsaw, Poland
| | - Piotr Matyba
- Center for Translational Medicine, Warsaw University of Life Sciences, Nowoursynowska 100, 02-797, Warsaw, Poland
| | - Zdzisław Gajewski
- Center for Translational Medicine, Warsaw University of Life Sciences, Nowoursynowska 100, 02-797, Warsaw, Poland
| | - Elżbieta Grzesiuk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106, Warsaw, Poland.
| | - Romuald Zabielski
- Center for Translational Medicine, Warsaw University of Life Sciences, Nowoursynowska 100, 02-797, Warsaw, Poland.
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Paslawski R, Kowalczyk P, Paslawska U, Wiśniewski J, Dzięgiel P, Janiszewski A, Kiczak L, Zacharski M, Gawdzik B, Kramkowski K, Szuba A. Analysis of the Model of Atherosclerosis Formation in Pig Hearts as a Result of Impaired Activity of DNA Repair Enzymes. Int J Mol Sci 2024; 25:2282. [PMID: 38396961 PMCID: PMC10888614 DOI: 10.3390/ijms25042282] [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: 12/06/2023] [Revised: 02/05/2024] [Accepted: 02/11/2024] [Indexed: 02/25/2024] Open
Abstract
Excessive consumption of food rich in saturated fatty acids and carbohydrates can lead to metabolic disturbances and cardiovascular disease. Hyperlipidemia is a significant risk factor for acute cardiac events due to its association with oxidative stress. This leads to arterial wall remodeling, including an increase in the thickness of the intima media complex (IMT), and endothelial dysfunction leading to plaque formation. The decreased nitric oxide synthesis and accumulation of lipids in the wall result in a reduction in the vasodilating potential of the vessel. This study aimed to establish a clear relationship between markers of endothelial dysfunction and the activity of repair enzymes in cardiac tissue from a pig model of early atherosclerosis. The study was conducted on 28 female Polish Landrace pigs, weighing 40 kg (approximately 3.5 months old), which were divided into three groups. The control group (n = 11) was fed a standard, commercial, balanced diet (BDG) for 12 months. The second group (n = 9) was fed an unbalanced, high-calorie Western-type diet (UDG). The third group (n = 8) was fed a Western-type diet for nine months and then switched to a standard, balanced diet (regression group, RG). Control examinations, including blood and urine sampling, were conducted every three months under identical conditions with food restriction for 12 h and water restriction for four hours before general anesthesia. The study analyzed markers of oxidative stress formed during lipid peroxidation processes, including etheno DNA adducts, ADMA, and NEFA. These markers play a crucial role in reactive oxygen species analysis in ischemia-reperfusion and atherosclerosis in mammalian tissue. Essential genes involved in oxidative-stress-induced DNA demethylation like OGG1 (8-oxoguanine DNA glycosylase), MPG (N-Methylpurine DNA Glycosylase), TDG (Thymine-DNA glycosylase), APEX (apurinic/apirymidinic endodeoxyribonuclease 1), PTGS2 (prostaglandin-endoperoxide synthase 2), and ALOX (Arachidonate Lipoxygenase) were measured using the Real-Time RT-PCR method. The data suggest that high oxidative stress, as indicated by TBARS levels, is associated with high levels of DNA repair enzymes and depends on the expression of genes involved in the repair pathway. In all analyzed groups of heart tissue homogenates, the highest enzyme activity and gene expression values were observed for the OGG1 protein recognizing the modified 8oxoG. Conclusion: With the long-term use of an unbalanced diet, the levels of all DNA repair genes are increased, especially (significantly) Apex, Alox, and Ptgs, which strongly supports the hypothesis that an unbalanced diet induces oxidative stress that deregulates DNA repair mechanisms and may contribute to genome instability and tissue damage.
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Affiliation(s)
- Robert Paslawski
- Veterinary Insitute, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland;
- WROVASC—Regional Specialist Hospital in Wroclaw, Research and Development Centre, Kamieńskiego 73a, 51-124 Wroclaw, Poland; (P.D.); (A.J.); (L.K.); (M.Z.); (A.S.)
| | - Paweł Kowalczyk
- The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, Instytucka 3, 05-110 Jabłonna, Poland
| | - Urszula Paslawska
- Veterinary Insitute, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland;
- WROVASC—Regional Specialist Hospital in Wroclaw, Research and Development Centre, Kamieńskiego 73a, 51-124 Wroclaw, Poland; (P.D.); (A.J.); (L.K.); (M.Z.); (A.S.)
| | - Jerzy Wiśniewski
- Department of Medical Biochemistry, Faculty of Medicine, Wroclaw Medical University, Chałubińskiego 10, 50-368 Wroclaw, Poland;
| | - Piotr Dzięgiel
- WROVASC—Regional Specialist Hospital in Wroclaw, Research and Development Centre, Kamieńskiego 73a, 51-124 Wroclaw, Poland; (P.D.); (A.J.); (L.K.); (M.Z.); (A.S.)
- Department of Histology and Embryology, Wroclaw Medical University, Chałubińskiego 6a, 50-368 Wroclaw, Poland
| | - Adrian Janiszewski
- WROVASC—Regional Specialist Hospital in Wroclaw, Research and Development Centre, Kamieńskiego 73a, 51-124 Wroclaw, Poland; (P.D.); (A.J.); (L.K.); (M.Z.); (A.S.)
- Faculty of Veterinary Medicine, Life Science Institute, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland
| | - Liliana Kiczak
- WROVASC—Regional Specialist Hospital in Wroclaw, Research and Development Centre, Kamieńskiego 73a, 51-124 Wroclaw, Poland; (P.D.); (A.J.); (L.K.); (M.Z.); (A.S.)
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, 31 Norwida St., 50-375 Wroclaw, Poland
| | - Maciej Zacharski
- WROVASC—Regional Specialist Hospital in Wroclaw, Research and Development Centre, Kamieńskiego 73a, 51-124 Wroclaw, Poland; (P.D.); (A.J.); (L.K.); (M.Z.); (A.S.)
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, 31 Norwida St., 50-375 Wroclaw, Poland
| | - Barbara Gawdzik
- Institute of Chemistry, Jan Kochanowski University, Świętokrzyska 15 G, 25-406 Kielce, Poland;
| | - Karol Kramkowski
- Department of Physical Chemistry, Medical University of Bialystok, Kilińskiego 1, 15-089 Białystok, Poland;
| | - Andrzej Szuba
- WROVASC—Regional Specialist Hospital in Wroclaw, Research and Development Centre, Kamieńskiego 73a, 51-124 Wroclaw, Poland; (P.D.); (A.J.); (L.K.); (M.Z.); (A.S.)
- Division of Angiology, Wroclaw Medical University, Pasteur 1, 50-367 Wroclaw, Poland
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Wuri L, Burghardt RC, Arosh JA, Long CR, Banu SK. Hexavalent Chromium Disrupts Oocyte Development in Rats by Elevating Oxidative Stress, DNA Double-Strand Breaks, Microtubule Disruption, and Aberrant Segregation of Chromosomes. Int J Mol Sci 2023; 24:10003. [PMID: 37373153 DOI: 10.3390/ijms241210003] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/01/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Environmental and occupational exposure to hexavalent chromium, Cr(VI), causes female reproductive failures and infertility. Cr(VI) is used in more than 50 industries and is a group A carcinogen, mutagenic and teratogenic, and a male and female reproductive toxicant. Our previous findings indicate that Cr(VI) causes follicular atresia, trophoblast cell apoptosis, and mitochondrial dysfunction in metaphase II (MII) oocytes. However, the integrated molecular mechanism of Cr(VI)-induced oocyte defects is not understood. The current study investigates the mechanism of Cr(VI) in causing meiotic disruption of MII oocytes, leading to oocyte incompetence in superovulated rats. Postnatal day (PND) 22 rats were treated with potassium dichromate (1 and 5 ppm) in drinking water from PND 22-29 and superovulated. MII oocytes were analyzed by immunofluorescence, and images were captured by confocal microscopy and quantified by Image-Pro Plus software, Version 10.0.5. Our data showed that Cr(VI) increased microtubule misalignment (~9 fold), led to missegregation of chromosomes and bulged and folded actin caps, increased oxidative DNA (~3 fold) and protein (~9-12 fold) damage, and increased DNA double-strand breaks (~5-10 fold) and DNA repair protein RAD51 (~3-6 fold). Cr(VI) also induced incomplete cytokinesis and delayed polar body extrusion. Our study indicates that exposure to environmentally relevant doses of Cr(VI) caused severe DNA damage, distorted oocyte cytoskeletal proteins, and caused oxidative DNA and protein damage, resulting in developmental arrest in MII oocytes.
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Affiliation(s)
- Liga Wuri
- Department of Veterinary Integrative Biosciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA
| | - Robert C Burghardt
- Department of Veterinary Integrative Biosciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA
| | - Joe A Arosh
- Department of Veterinary Integrative Biosciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA
| | - Charles R Long
- Department of Veterinary Physiology and Pharmacology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA
| | - Sakhila K Banu
- Department of Veterinary Integrative Biosciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA
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Al-Saleh I, Coskun S, Al-Rouqi R, Al-Rajudi T, Eltabache C, Abduljabbar M, Al-Hassan S. Oxidative stress and DNA damage status in couples undergoing in vitro fertilization treatment. REPRODUCTION AND FERTILITY 2022; 2:117-139. [PMID: 35128448 PMCID: PMC8812407 DOI: 10.1530/raf-20-0062] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 04/23/2021] [Indexed: 01/03/2023] Open
Abstract
This study examined the status of oxidative stress in 599 couples undertaking in vitro fertilization (IVF) treatment and its association with reproductive hormones, smoking, and outcomes. Oxidative stress biomarkers such as malondialdehyde, 8-hydroxy-2-deoxyguanosine, hydrogen peroxide (H2O2), catalase (CAT), and total antioxidant capacity (TAC) were determined in follicular fluid and seminal plasma. Tail moment (TM) was used to evaluate DNA damage in the sperm and granulosa cells. Reproductive hormones in serum and cotinine (COT) in urine, follicular fluid, and seminal plasma samples were determined. Separate multivariate linear regression was used to assess associations between levels of each oxidative stress biomarker and each hormone and smoking parameter (modeled as natural log-transformed). The findings indicate that some oxidative stress and DNA damage biomarkers played a role in disrupting certain reproductive hormones in women and their male partners either by overproducing reactive oxygen species or reducing antioxidant defense capacity. Although women were nonsmokers, COT levels > 50 and 10 µg/L in urine and follicular were observed in 5.7 and 1.7%, respectively. Levels of follicular fluid COT were positively associated with H2O2 and TM. We used log-binomial multivariate regression to estimate relative risks for the association between oxidative stress/DNA damage and IVF binary outcomes (fertilization rate > 50%, biochemical pregnancy, clinical pregnancy, and live birth). An increase in the CAT levels of follicular fluid was associated with a 48 and 41% decrease in the risk of poor fertilization rate (≤50%) and unsuccessful live birth, respectively. After the models were adjusted for hormonal factors, the associations remained the same, except that the elevated TAC in follicular fluid became significantly associated with a decrease of 42% in the risk of poor fertilization rate (≤50%). The higher antioxidant activity (CAT and TAC) in follicular fluid might positively impact specific IVF outcomes.
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Affiliation(s)
- Iman Al-Saleh
- Environmental Health Program, Research Centre, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Serdar Coskun
- Department of Pathology and Laboratory Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Reem Al-Rouqi
- Environmental Health Program, Research Centre, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Tahreer Al-Rajudi
- Environmental Health Program, Research Centre, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Chafica Eltabache
- Environmental Health Program, Research Centre, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Mai Abduljabbar
- Environmental Health Program, Research Centre, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Saad Al-Hassan
- Reproductive Medicine Unit, Department of Obstetrics and Gynecology, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
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Koc K, Aysin F, Ozek NS, Geyikoglu F, Taghizadehghalehjoughi A, Abuc OO, Cakmak O, Deniz GY. Inula graveolens induces selective cytotoxicity in glioblastoma and chronic leukemia cells. Rev Assoc Med Bras (1992) 2021; 67:1771-1778. [PMID: 34909948 DOI: 10.1590/1806-9282.20210614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 09/19/2021] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE Crude oil extracts, components of extracts, and ethanolic extracts of Inula graveolens possess various pharmacological activities on various cancer cells including antioxidative and antiproliferative effects. Aqueous extract of this species has not been investigated on the liquid malignancies and solid tumors with a high incidence of treatment refractoriness and poor survival outcomes such as glioblastoma and leukemia. Hence, the present study aimed to evaluate the cytotoxic efficiency of I. graveolens aqueous extracts on human glioblastoma multiforme and chronic myelogenous leukemia cell lines in comparison to non-cancerous primary rat cerebral cortex and human peripheral blood mononuclear cells. METHODS The cells were treated with the extracts of I. graveolens (125-1000 μg/mL) for 48 h, the cellular viability was identified using 3'-(4,5dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay, and lactate dehydrogenase release was measured to determine the cytotoxic potential. Total oxidant status and apurinic/apyrimidinic endodeoxyribonuclease 1 assays were used to determine the oxidative status of cells and DNA damage, respectively. RESULTS I. graveolens showed selective cytotoxicity toward human glioblastoma multiforme and chronic myelogenous leukemia cell lines and exhibited a higher antiproliferative effect against cancer cells in comparison to non-cancerous cells. Moreover, it significantly reduced the apurinic/apyrimidinic endodeoxyribonuclease 1 levels on both cancer cell lines as compared with their control cells without changing the levels of an oxidative stress marker. CONCLUSION The extracts of I. graveolens have anti-cancer potential on human glioblastoma multiforme and chronic myelogenous leukemia cell lines without causing oxidative stress.
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Affiliation(s)
- Kubra Koc
- Ataturk University, Faculty of Science, Department of Biology - Erzurum, Turkey
| | - Ferhunde Aysin
- Ataturk University, Faculty of Science, Department of Biology - Erzurum, Turkey.,Ataturk University, East Anatolian High Technology Research and Application Center - Erzurum, Turkey
| | - Nihal Simsek Ozek
- Ataturk University, Faculty of Science, Department of Biology - Erzurum, Turkey.,Ataturk University, East Anatolian High Technology Research and Application Center - Erzurum, Turkey
| | - Fatime Geyikoglu
- Ataturk University, Faculty of Science, Department of Biology - Erzurum, Turkey
| | - Ali Taghizadehghalehjoughi
- Ataturk University, Faculty of Veterinary Science, Department of Pharmacology and Toxicology - Erzurum, Turkey
| | - Ozlem Ozgul Abuc
- Erzincan University, Faculty of Medicine, Department of Histology and Embryology - Erzincan, Turkey
| | - Ozge Cakmak
- Ataturk University, Faculty of Science, Department of Biology - Erzurum, Turkey
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Demirci-Çekiç S, Özkan G, Avan AN, Uzunboy S, Çapanoğlu E, Apak R. Biomarkers of Oxidative Stress and Antioxidant Defense. J Pharm Biomed Anal 2021; 209:114477. [PMID: 34920302 DOI: 10.1016/j.jpba.2021.114477] [Citation(s) in RCA: 90] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/27/2021] [Accepted: 11/11/2021] [Indexed: 12/13/2022]
Abstract
A number of reactive oxygen and nitrogen species are produced during normal metabolism in human body. These species can be both radical and non-radical and have varying degrees of reactivity. Although they have some important functions in the human body, such as contributing to signal transmission and the immune system, their presence must be balanced by the antioxidant defense system. The human body has an excellent intrinsic enzymatic antioxidant system in addition to different non-enzymatic antioxidants having small molecular masses. An extrinsic source of antioxidants are foodstuffs such as fruits, vegetables, herbs and spices, mostly rich in polyphenols. When the delicate biochemical balance between oxidants and antioxidants is disturbed in favor of oxidants, "oxidative stress" conditions emerge, under which reactive species can cause oxidative damage to biomacromolecules such as proteins, carbohydrates, lipids and DNA. This oxidative damage is often associated with cancer, aging, and neurodegenerative disorders. Because reactive species are extremely short-lived, it is almost impossible to measure their concentrations directly. Although there are certain methods such as ESR / EPR that serve this purpose, they have some disadvantages and are quite costly systems. Therefore, products generated from oxidative damage of proteins, lipids and DNA are often used to quantify the extent of oxidative damage rather than direct measurement of reactive species. These oxidative damage products are usually known as biomarkers. Determination of the concentrations of these biomarkers and changes in the concentration of protective antioxidants can provide useful information for avoiding certain diseases and keep healthy conditions.
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Affiliation(s)
- Sema Demirci-Çekiç
- Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpasa, Avcilar, 34320 Istanbul, Turkey
| | - Gülay Özkan
- Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical Uviversity, Istanbul, Turkey
| | - Aslı Neslihan Avan
- Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpasa, Avcilar, 34320 Istanbul, Turkey
| | - Seda Uzunboy
- Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpasa, Avcilar, 34320 Istanbul, Turkey
| | - Esra Çapanoğlu
- Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical Uviversity, Istanbul, Turkey.
| | - Reşat Apak
- Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpasa, Avcilar, 34320 Istanbul, Turkey; Turkish Academy of Sciences (TUBA), Vedat Dalokay St. No. 112, Cankaya, 06670 Ankara, Turkey.
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Pharmacological relevance of CDK inhibitors in Alzheimer's disease. Neurochem Int 2021; 148:105115. [PMID: 34182065 DOI: 10.1016/j.neuint.2021.105115] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/22/2021] [Accepted: 06/24/2021] [Indexed: 12/11/2022]
Abstract
Evidence suggests that cell cycle activation plays a role in the pathophysiology of neurodegenerative diseases. Alzheimer's disease is a progressive, terminal neurodegenerative disease that affects memory and other important mental functions. Intracellular deposition of Tau protein, a hyperphosphorylated form of a microtubule-associated protein, and extracellular aggregation of Amyloid β protein, which manifests as neurofibrillary tangles (NFT) and senile plaques, respectively, characterize this condition. In recent years, however, several studies have concluded that cell cycle re-entry is one of the key causes of neuronal death in the pathogenesis of Alzheimer's disease. The eukaryotic cell cycle is well-coordinated machinery that performs critical functions in cell replenishment, such as DNA replication, cell creation, repair, and the birth of new daughter cells from the mother cell. The complex interplay between the levels of various cyclins and cyclin-dependent kinases (CDKs) at different checkpoints is needed for cell cycle synchronization. CDKIs (cyclin-dependent kinase inhibitors) prevent cyclin degradation and CDK inactivation. Different external and internal factors regulate them differently, and they have different tissue expression and developmental functions. The checkpoints ensure that the previous step is completed correctly before starting the new cell cycle phase, and they protect against the transfer of defects to the daughter cells. Due to the development of more selective and potent ATP-competitive CDK inhibitors, CDK inhibitors appear to be on the verge of having a clinical impact. This avenue is likely to yield new and effective medicines for the treatment of cancer and other neurodegenerative diseases. These new methods for recognizing CDK inhibitors may be used to create non-ATP-competitive agents that target CDK4, CDK5, and other CDKs that have been recognized as important therapeutic targets in Alzheimer's disease treatment.
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Lymphaticovenous Anastomosis Supermicrosurgery Decreases Oxidative Stress and Increases Antioxidant Capacity in the Serum of Lymphedema Patients. J Clin Med 2021; 10:jcm10071540. [PMID: 33917571 PMCID: PMC8038828 DOI: 10.3390/jcm10071540] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 03/17/2021] [Accepted: 03/24/2021] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Excess lymphedematous tissue causes excessive oxidative stress in lymphedema. Lymphaticovenous anastomosis (LVA) supermicrosurgery is currently emerging as the first-line surgical intervention for lymphedema. No data are available regarding the changes in serum proteins correlating to oxidative stress and antioxidant capacity before and after LVA. METHODS A total of 26 patients with unilateral lower limb lymphedema confirmed by lymphoscintigraphy were recruited, and venous serum samples were collected before (pre-LVA) and after LVA (post-LVA). In 16 patients, the serum proteins were identified by isobaric tags for relative and absolute quantitation-based quantitative proteomic analysis with subsequent validation of protein expression by enzyme-linked immunosorbent assay. An Oxidative Stress Panel Kit was used on an additional 10 patients. Magnetic resonance (MR) volumetry was used to measure t limb volume six months after LVA. RESULTS This study identified that catalase (CAT) was significantly downregulated after LVA (pre-LVA vs. post-LVA, 2651 ± 2101 vs. 1448 ± 593 ng/mL, respectively, p = 0.033). There were significantly higher levels of post-LVA serum total antioxidant capacity (pre-LVA vs. post-LVA, 441 ± 81 vs. 488 ± 59 µmole/L, respectively, p = 0.031) and glutathione peroxidase (pre-LVA vs. post-LVA, 73 ± 20 vs. 92 ± 29 U/g, respectively, p = 0.018) than pre-LVA serum. In addition, after LVA, there were significantly more differences between post-LVA and pre-LVA serum levels of CAT (good outcome vs. fair outcome, -2593 ± 2363 vs. 178 ± 603 ng/mL, respectively, p = 0.021) and peroxiredoxin-2 (PRDX2) (good outcome vs. fair outcome, -7782 ± 7347 vs. -397 ± 1235 pg/mL, respectively, p = 0.037) in those patients with good outcomes (≥40% volume reduction in MR volumetry) than those with fair outcomes (<40% volume reduction in MR volumetry). CONCLUSIONS The study revealed that following LVA, differences in some specific oxidative stress markers and antioxidant capacity can be found in the serum of patients with lymphedema.
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Misztal T, Kowalczyk P, Młotkowska P, Marciniak E. The Effect of Allopregnanolone on Enzymatic Activity of the DNA Base Excision Repair Pathway in the Sheep Hippocampus and Amygdala under Natural and Stressful Conditions. Int J Mol Sci 2020; 21:E7762. [PMID: 33092287 PMCID: PMC7589085 DOI: 10.3390/ijms21207762] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 10/15/2020] [Accepted: 10/19/2020] [Indexed: 01/24/2023] Open
Abstract
The neurosteroid allopregnanolone (AL) has many beneficial functions in the brain. This study tested the hypothesis that AL administered for three days into the third brain ventricle would affect the enzymatic activity of the DNA base excision repair (BER) pathway in the hippocampal CA1 and CA3 fields and the central amygdala in luteal-phase sheep under both natural and stressful conditions. Acute stressful stimuli, including isolation and partial movement restriction, were used on the last day of infusion. The results showed that stressful stimuli increased N-methylpurine DNA glycosylase (MPG), thymine DNA glycosylase (TDG), 8-oxoguanine glycosylase (OGG1), and AP-endonuclease 1 (APE1) mRNA expression, as well as repair activities for 1,N6-ethenoadenine (εA), 3,N4-ethenocytosine (εC), and 8-oxoguanine (8-oxoG) compared to controls. The stimulated events were lower in stressed and AL-treated sheep compared to sheep that were only stressed (except MPG mRNA expression in the CA1 and amygdala, as well as TDG mRNA expression in the CA1). AL alone reduced mRNA expression of all DNA repair enzymes (except TDG in the amygdala) relative to controls and other groups. DNA repair activities varied depending on the tissue-AL alone stimulated the excision of εA in the amygdala, εC in the CA3 and amygdala, and 8-oxoG in all tissues studied compared to controls. However, the excision efficiency of lesioned bases in the AL group was lower than in the stressed and stressed and AL-treated groups, with the exception of εA in the amygdala. In conclusion, the presented modulating effect of AL on the synthesis of BER pathway enzymes and their repair capacity, both under natural and stressful conditions, indicates another functional role of this neurosteroid in brain structures.
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Affiliation(s)
- Tomasz Misztal
- The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, Instytucka 3, 05-110 Jabłonna, Poland; (P.K.); (P.M.); (E.M.)
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10
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Yamabe S, Tsuchida N, Yamazaki S. DFT Study of the Hydroxyl Radical Addition to 2'-Deoxyguanosine and the Guanine Base in Four Double-Stranded B-Form Dimers. J Phys Chem B 2020; 124:1374-1382. [PMID: 32011138 DOI: 10.1021/acs.jpcb.9b10330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Density functional theory (DFT) calculations of reactions between 2'-deoxyguanosine (dR-Gua) and hydroxyl radical (HO•) with water molecules (H2O)n, n = 0, 1, and 2, were carried out. The HO• addition to three carbon sites, C(4), C(5), and C(8), and the subsequent ring cleavage of the three HO adducts were investigated. The addition to C(5) is of the smallest activation energy according to the largest lobe of the dR-Gua highest occupied molecular orbital (HOMO) at C(5). However, its adduct has small stability, and the C(8) adduct has the largest one. The C(8) adduct and the ring-opened amide have similar stability, which would lead to the apparent small yield of the former. Calculations were also performed on HO• additions to the C(4) and C(8) sites of the guanine moiety of four dimer sequence models of B-form DNA with nucleotide moieties (a) 5'-GA-3', (b) 5'-GG-3', (c) 5'-GT-3', and (d) 5'-GC-3'. For instance, the (a) 5'-GA-3' model has a molecular formula C39H50N15Na2O21P2. The HO• attack to C(4) is ruled out owing to the reinforced deformation of the parallel stacking of base pairs. The clear selectivity that the (b) 5'-GG-3' sequence is most reactive was found with the inclusion of the water dimer.
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Affiliation(s)
- Shinichi Yamabe
- Department of Chemistry , Nara University of Education , Takabatake-cho , Nara 630-8528 , Japan
| | - Noriko Tsuchida
- Department of Liberal Arts, Faculty of Medicine , Saitama Medical University , 38 Morohongo , Moroyama-machi, Iruma-gun, Saitama 350-0495 , Japan
| | - Shoko Yamazaki
- Department of Chemistry , Nara University of Education , Takabatake-cho , Nara 630-8528 , Japan
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11
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Chen H, Zhang J, Dai Y, Xu J. Nerve growth factor inhibits TLR3-induced inflammatory cascades in human corneal epithelial cells. JOURNAL OF INFLAMMATION-LONDON 2019; 16:27. [PMID: 31889912 PMCID: PMC6933932 DOI: 10.1186/s12950-019-0232-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 12/18/2019] [Indexed: 12/14/2022]
Abstract
Background In herpes simplex epithelial keratitis, excessive TLR3-induced cellular responses after virus infection evoke inflammatory cascades that might be destructive to the host cornea. Nerve growth factor (NGF), a pluripotent neurotrophic factor with immune regulatory effect, was proved to be effective in Herpes simplex keratitis (HSK) treatment, although the detailed mechanisms remain unclear. This study aims to investigate the effects of NGF on modulating inflammatory responses triggered by TLR3 activation in human corneal epithelial cells (HCECs) in vitro. Methods HCECs were stimulated with TLR3 agonist, poly(I:C), in the absence or presence of NGF. Cell viability and cytotoxicity were measured by a CCK-8 assay and LDH release assay, respectively. The activation of NF-κB signaling pathway was examined using immunofluorescence staining and western blotting. Levels of proinflammatory cytokines were determined by ELISA or RT-qPCR. ROS generation and 8-OHdG positive cells were examined by a fluorometric analysis. Results It was shown that NGF significantly inhibited the generation of proinflammatory cytokines in HCECs triggered by TLR3 activation (P < 0.05), probably via suppressing NF-κB activation. NGF also impeded the upstream signal to initiate NF-κB activation by scavenging ROS by approximately 50% (P < 0.05). In addition, 8-OHdG positive cells were substantially attenuated by NGF treatment (P < 0.01). Conclusions Taken together, this study indicates that NGF could inhibit TLR3-induced inflammatory cascades in HCECs, suggesting NGF as a potential therapeutic agent for HSK.
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Affiliation(s)
- Huiyu Chen
- Department of Ophthalmology and Visual Science, Eye & ENT Hospital, NHC Key Laboratory of myopia (Fudan University); Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai Medical College of Fudan University, Shanghai, 200031 China
| | - Jing Zhang
- Department of Ophthalmology and Visual Science, Eye & ENT Hospital, NHC Key Laboratory of myopia (Fudan University); Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai Medical College of Fudan University, Shanghai, 200031 China
| | - Yiqin Dai
- Department of Ophthalmology and Visual Science, Eye & ENT Hospital, NHC Key Laboratory of myopia (Fudan University); Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai Medical College of Fudan University, Shanghai, 200031 China
| | - Jianjiang Xu
- Department of Ophthalmology and Visual Science, Eye & ENT Hospital, NHC Key Laboratory of myopia (Fudan University); Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai Medical College of Fudan University, Shanghai, 200031 China
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12
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AID, APOBEC3A and APOBEC3B efficiently deaminate deoxycytidines neighboring DNA damage induced by oxidation or alkylation. Biochim Biophys Acta Gen Subj 2019; 1863:129415. [PMID: 31404619 DOI: 10.1016/j.bbagen.2019.129415] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/26/2019] [Accepted: 08/07/2019] [Indexed: 12/29/2022]
Abstract
BACKGROUND AID/APOBEC3 (A3) enzymes instigate genomic mutations that are involved in immunity and cancer. Although they can deaminate any deoxycytidine (dC) to deoxyuridine (dU), each family member has a signature preference determined by nucleotides surrounding the target dC. This WRC (W = A/T, R = A/G) and YC (Y = T/C) hotspot preference is established for AID and A3A/A3B, respectively. Base alkylation and oxidation are two of the most common types of DNA damage induced environmentally or by chemotherapy. Here we examined the activity of AID, A3A and A3B on dCs neighboring such damaged bases. METHODS Substrates were designed to contain target dCs either in normal WRC/YC hotspots, or in oxidized/alkylated DNA motifs. AID, A3A and A3B were purified and deamination kinetics of each were compared between substrates containing damaged vs. normal motifs. RESULTS All three enzymes efficiently deaminated dC when common damaged bases were present in the -2 or -1 positions. Strikingly, some damaged motifs supported comparable or higher catalytic efficiencies by AID, A3A and A3B than the WRC/YC motifs which are their most favored normal sequences. Based on the resolved interactions of AID, A3A and A3B with DNA, we modeled interactions with alkylated or oxidized bases. Corroborating the enzyme assay data, the surface regions that recognize normal bases are predicted to also interact robustly with oxidized and alkylated bases. CONCLUSIONS AID, A3A and A3B can efficiently recognize and deaminate dC whose neighbouring nucleotides are damaged. GENERAL SIGNIFICANCE Beyond AID/A3s initiating DNA damage, some forms of pre-existing damaged DNA can constitute favored targets of AID/A3s if encountered.
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H 2O 2 Metabolism in Normal Thyroid Cells and in Thyroid Tumorigenesis: Focus on NADPH Oxidases. Antioxidants (Basel) 2019; 8:antiox8050126. [PMID: 31083324 PMCID: PMC6563055 DOI: 10.3390/antiox8050126] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 04/18/2019] [Accepted: 04/24/2019] [Indexed: 12/23/2022] Open
Abstract
Thyroid hormone synthesis requires adequate hydrogen peroxide (H2O2) production that is utilized as an oxidative agent during the synthesis of thyroxin (T4) and triiodothyronine (T3). Thyroid H2O2 is generated by a member of the family of NADPH oxidase enzymes (NOX-es), termed dual oxidase 2 (DUOX2). NOX/DUOX enzymes produce reactive oxygen species (ROS) as their unique enzymatic activity in a timely and spatially regulated manner and therefore, are important regulators of diverse physiological processes. By contrast, dysfunctional NOX/DUOX-derived ROS production is associated with pathological conditions. Inappropriate DUOX2-generated H2O2 production results in thyroid hypofunction in rodent models. Recent studies also indicate that ROS improperly released by NOX4, another member of the NOX family, are involved in thyroid carcinogenesis. This review focuses on the current knowledge concerning the redox regulation of thyroid hormonogenesis and cancer development with a specific emphasis on the NOX and DUOX enzymes in these processes.
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Al-Saleh I, Coskun S, Al-Doush I, Al-Rajudi T, Al-Rouqi R, Abduljabbar M, Al-Hassan S. Exposure to phthalates in couples undergoing in vitro fertilization treatment and its association with oxidative stress and DNA damage. ENVIRONMENTAL RESEARCH 2019; 169:396-408. [PMID: 30529141 DOI: 10.1016/j.envres.2018.11.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 11/13/2018] [Accepted: 11/15/2018] [Indexed: 06/09/2023]
Abstract
This prospective study of 599 couples seeking fertility treatment and who were recruited between 2015 and 2017 was conducted to (a) explore the associations between phthalate exposure and in vitro fertilization (IVF) outcomes; and (b) examine the implication of oxidative stress as a mediator of these. We measured eight phthalate metabolites in two spot urine samples; oxidative stress biomarkers such as malondialdehyde, 8-hydroxy-2-deoxyguanosine, hydrogen peroxide, catalase (CAT), and total antioxidant capacity in follicular fluid and seminal plasma. We also examined DNA damage in sperm and granulosa cells. Couples were exposed to a broad range of phthalate compounds and seven metabolites were detected in over 94% of the urine samples, whereas monobenzyl phthalate was found in only 24% of women and 26% of men. Our results showed high levels of seven urinary phthalate metabolites (except monobenzyl phthalate) and a notable increase in many oxidative stress markers in both follicular fluid and seminal plasma. However, their associations with exposure were rather limited. Multivariate binomial regression modeling showed higher levels of follicular CAT levels reduced the probability of fertilization rate (≤ 50%) [Adjusted relative risk (RRadj) = 0.52, p = 0.005] and unsuccessful live birth (RRadj = 0.592, p = 0.023). We observed a 46% decrease in the probability of clinical pregnancy in association with an elevated percentage of DNA in the tail (RRadj = 0.536, p = 0.04). There was a 32% and 22% increase in the probability of clinical pregnancy and unsuccessful live birth associated with higher levels of mono-(2-ethylhexyl) phthalate (RRadj = 1.32, p = 0.049) and monoethyl phthalate (RRadj = 1.22, p = 0.032) in women, respectively. In contrast, the probability of clinical pregnancy reduced by 20% with higher levels of mono-(2-ethyl-5-carboxypentyl) phthalate (RRadj = 0.797, p = 0.037) and 19.6% with mono-(2-ethyl-5-oxohexyl) phthalate (MEOHP) (RRadj = 0.804, p = 0.041) in men. Other oxidative stress biomarkers or urinary phthalate metabolites showed suggestive relationships with certain IVF outcomes. Lastly, our results demonstrated that elevated levels of CAT in follicular fluid might have a positive impact on fertilization rate ≥ 50% and successful live birth. CAT seems to play a potential role in mediating the relationship between the risk of poor fertilization rate and MEOHP and mono-isobutyl phthalate. Additional data are required to understand the clinical implications of oxidative stress and its contribution to the reproductive toxicity of phthalate exposure.
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Affiliation(s)
- Iman Al-Saleh
- Environmental Health Program, Research Centre, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia.
| | - Serdar Coskun
- Department of Pathology and Laboratory Medicine, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia
| | - Inaam Al-Doush
- Environmental Health Program, Research Centre, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia
| | - Tahreer Al-Rajudi
- Environmental Health Program, Research Centre, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia
| | - Reem Al-Rouqi
- Environmental Health Program, Research Centre, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia
| | - Mai Abduljabbar
- Environmental Health Program, Research Centre, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia
| | - Saad Al-Hassan
- Reproductive Medicine Unit, Department of Obstetrics & Gynecology, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia
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Monguzzi E, Marabini L, Elli L, Vaira V, Ferrero S, Ferretti F, Branchi F, Gaudioso G, Scricciolo A, Lombardo V, Doneda L, Roncoroni L. Gliadin effect on the oxidative balance and DNA damage: An in-vitro, ex-vivo study. Dig Liver Dis 2019; 51:47-54. [PMID: 30055963 DOI: 10.1016/j.dld.2018.06.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 05/29/2018] [Accepted: 06/20/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND Gliadins are involved in gluten-related disorders and are responsible for the alteration of the cellular redox balance. It is not clear if the gliadin-related oxidative stress can induce DNA damage in enterocytes. AIM To investigate any possible genotoxicity caused by gliadin and to assess its relationship with oxidative stress in vitro and ex vivo. METHODS Caco-2 cells were exposed for 6-12-24 h to increasing concentrations (250 μg/mL-1000 μg/mL) of digested gliadin. We investigated: cytotoxicity, oxidative balance (reactive oxygen species, ROS), DNA damage (comet assay and γ-H2AX detection), transglutaminase type 2 (TG2) activity and annexin V expression. H2AX and 8-OHG immunohistochemistry has been evaluated on duodenal biopsies of celiac subjects and controls. RESULTS Gliadin induced a significant increase (+50%) of ROS after 12 h of exposition starting with a 500 μg/mL dose of gliadin. Comet assay and γ-H2AX demonstrated DNA damage, evident at the gliadin concentration of 500 μg/mL after 24 h. TG2 activity increased in chromatin and cytoskeleton cellular compartments at different gliadin doses (250/500/1000 μg/mL). The γ-H2AX and 8-OHG immunohistochemistry was altered in the duodenal biopsies of celiac patients. CONCLUSIONS Gliadin induces cellular oxidative stress, DNA damage and pro-apoptotic stimulation in Caco-2 cells and in the duodenal mucosa of celiac patients.
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Affiliation(s)
- Erika Monguzzi
- Gastroenterology and Endoscopy Unit - Center for Prevention and Diagnosis of Celiac Disease, IRCCS Ca's Granda Foundation "Ospedale Maggiore Policlinico", Milan, Italy; Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
| | - Laura Marabini
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Italy
| | - Luca Elli
- Gastroenterology and Endoscopy Unit - Center for Prevention and Diagnosis of Celiac Disease, IRCCS Ca's Granda Foundation "Ospedale Maggiore Policlinico", Milan, Italy.
| | - Valentina Vaira
- Division of Pathology, IRCCS Ca' Granda Foundation "Ospedale Maggiore Policlinico", Milan, Italy; Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
| | - Stefano Ferrero
- Division of Pathology, IRCCS Ca' Granda Foundation "Ospedale Maggiore Policlinico", Milan, Italy; Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milan, Italy
| | - Francesca Ferretti
- Gastroenterology and Endoscopy Unit - Center for Prevention and Diagnosis of Celiac Disease, IRCCS Ca's Granda Foundation "Ospedale Maggiore Policlinico", Milan, Italy; Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
| | - Federica Branchi
- Gastroenterology and Endoscopy Unit - Center for Prevention and Diagnosis of Celiac Disease, IRCCS Ca's Granda Foundation "Ospedale Maggiore Policlinico", Milan, Italy; Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
| | - Gabriella Gaudioso
- Division of Pathology, IRCCS Ca' Granda Foundation "Ospedale Maggiore Policlinico", Milan, Italy
| | - Alice Scricciolo
- Gastroenterology and Endoscopy Unit - Center for Prevention and Diagnosis of Celiac Disease, IRCCS Ca's Granda Foundation "Ospedale Maggiore Policlinico", Milan, Italy
| | - Vincenza Lombardo
- Gastroenterology and Endoscopy Unit - Center for Prevention and Diagnosis of Celiac Disease, IRCCS Ca's Granda Foundation "Ospedale Maggiore Policlinico", Milan, Italy
| | - Luisa Doneda
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milan, Italy
| | - Leda Roncoroni
- Gastroenterology and Endoscopy Unit - Center for Prevention and Diagnosis of Celiac Disease, IRCCS Ca's Granda Foundation "Ospedale Maggiore Policlinico", Milan, Italy; Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy; Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milan, Italy
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Yusuf M, Khan M, Robaian MA, Khan RA. Biomechanistic insights into the roles of oxidative stress in generating complex neurological disorders. Biol Chem 2018; 399:305-319. [PMID: 29261511 DOI: 10.1515/hsz-2017-0250] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Accepted: 12/07/2017] [Indexed: 12/13/2022]
Abstract
Neurological diseases like Alzheimer's disease, epilepsy, parkinsonism, depression, Huntington's disease and amyotrophic lateral sclerosis prevailing globally are considered to be deeply influenced by oxidative stress-based changes in the biochemical settings of the organs. The excess oxygen concentration triggers the production of reactive oxygen species, and even the intrinsic antioxidant enzyme system, i.e. SOD, CAT and GSHPx, fails to manage their levels and keep them under desirable limits. This consequently leads to oxidation of protein, lipids and nucleic acids in the brain resulting in apoptosis, proteopathy, proteasomes and mitochondrion dysfunction, glial cell activation as well as neuroinflammation. The present exploration deals with the evidence-based mechanism of oxidative stress towards development of key neurological diseases along with the involved biomechanistics and biomaterials.
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Affiliation(s)
- Mohammad Yusuf
- College of Pharmacy, Taif University, Taif-Al-Haweiah 21974, Saudi Arabia
| | - Maria Khan
- College of Pharmacy, Taif University, Taif-Al-Haweiah 21974, Saudi Arabia
| | - Majed A Robaian
- College of Pharmacy, Taif University, Taif-Al-Haweiah 21974, Saudi Arabia
| | - Riaz A Khan
- Medicinal Chemistry Department, Qassim University, Qassim 51452, Saudi Arabia
- Department of Chemistry, MRIU, Faridabad, HR 121 001, India
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Fusch G, Mitra S, Topp H, Agarwal A, Yiu SH, Bruhs J, Rochow N, Lange A, Heckmann M, Fusch C. Source and Quality of Enteral Nutrition Influences Oxidative Stress in Preterm Infants: A Prospective Cohort Study. JPEN J Parenter Enteral Nutr 2018; 42:1288-1294. [PMID: 29603266 DOI: 10.1002/jpen.1156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 01/29/2018] [Indexed: 11/11/2022]
Abstract
BACKGROUND Preterm infants are at risk of oxidative stress from neonatal intensive care interventions. 8-Oxo-2'-deoxyguanosine (8-oxodG), generated by oxygen radical attack on DNA, is a potential marker of oxidative stress. The aim of the present study was to investigate the impact of quality and source of enteral nutrition (EN) on renal excretion of 8-oxodG in preterm infants. METHODS Spontaneous urine samples were collected on postnatal days 26-31 in 33 preterm infants. Infants were fed either breast milk (BM), formula (FM), or BM/FM mixtures. Daily iron (Fe) supplementation was started day 28 ± 1 postnatally. 8-oxodG was determined by highperformance liquid chromatography-electrochemical detection (HPLC-EC). RESULTS The 8-oxodG/creatinine ratio was significantly higher in infants fed FM vs FM/BM (38.7 ± 28.7 vs 16.7 ± 12.2 nmol 8-oxodG/mmol creatinine, P < 0.0001) or BM (11.6 ± 10.4 nmol 8-oxodG/mmol creatinine, P < 0.0001). There was no significant effect of Fe supplementation (P = 0.547). 8-OxodG excretion showed significant interindividual variation but was similar within pairs of twins. CONCLUSION Quality and source of EN seem to influence oxidative stress in preterm infants. The underlying pathophysiological mechanism is unclear and needs further investigation. It may be speculated that other mechanisms than Fe supplementation contribute to oxidative stress, such as cow's milk protein-mediated up-regulation of the intestinal inflammatory cascade.
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Affiliation(s)
- Gerhard Fusch
- Division of Neonatology and Pediatric Intensive Care, Department of Pediatrics, University of Greifswald, Greifswald, Germany.,Division of Neonatology, Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada
| | - Souvik Mitra
- Division of Neonatology, Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada
| | - Heinrich Topp
- Division of Neonatology and Pediatric Intensive Care, Department of Pediatrics, University of Greifswald, Greifswald, Germany
| | - Arnav Agarwal
- Division of Neonatology, Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada
| | - So Hon Yiu
- Department of Mathematics and Statistics, McMaster University, Hamilton, Ontario, Canada
| | - Josefin Bruhs
- Division of Neonatology and Pediatric Intensive Care, Department of Pediatrics, University of Greifswald, Greifswald, Germany
| | - Niels Rochow
- Division of Neonatology and Pediatric Intensive Care, Department of Pediatrics, University of Greifswald, Greifswald, Germany.,Division of Neonatology, Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada
| | - Anja Lange
- Division of Neonatology and Pediatric Intensive Care, Department of Pediatrics, University of Greifswald, Greifswald, Germany
| | - Matthias Heckmann
- Division of Neonatology and Pediatric Intensive Care, Department of Pediatrics, University of Greifswald, Greifswald, Germany
| | - Christoph Fusch
- Division of Neonatology and Pediatric Intensive Care, Department of Pediatrics, University of Greifswald, Greifswald, Germany.,Division of Neonatology, Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada.,Department of Pediatrics, Paracelsus Medical University Nuremberg, Nuremberg General Hospital, Nuremberg, Germany
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Wu D, Liu B, Yin J, Xu T, Zhao S, Xu Q, Chen X, Wang H. Detection of 8-hydroxydeoxyguanosine (8-OHdG) as a biomarker of oxidative damage in peripheral leukocyte DNA by UHPLC–MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1064:1-6. [DOI: 10.1016/j.jchromb.2017.08.033] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 07/28/2017] [Accepted: 08/23/2017] [Indexed: 10/19/2022]
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Willmann G. Ultraviolet Keratitis: From the Pathophysiological Basis to Prevention and Clinical Management. High Alt Med Biol 2016; 16:277-82. [PMID: 26680683 DOI: 10.1089/ham.2015.0109] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Ultraviolet keratitis is caused by the toxic effects of acute high-dose ultraviolet radiation (UVR) reflecting the sensitivity of the ocular surface to photochemical injury. The clinical syndrome presents with ocular pain, tearing, conjunctival chemosis, blepharospasm, and deterioration of vision typically several hours after exposure, lasting up to 3 days. Mountaineers, skiers, and beach recreationalists are particularly at risk to suffer from ultraviolet (UV) keratitis as the reflectivity of UVR in these environments is extremely high. The aim of this review is to raise awareness about the potential of UV damage on the eye with an emphasis on UV keratitis, to highlight the pathophysiological basis of corneal phototoxicity, and to provide practical guidance for the prevention and clinical management of UV keratitis commonly known as snow blindness.
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Affiliation(s)
- Gabriel Willmann
- 1 Eye Hospital, Katharinenhospital , Stuttgart, Germany .,2 Centre for Ophthalmology, University of Tübingen , Tübingen, Germany
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Huang YC, Yu HS, Chai CY. Roles of oxidative stress and the ERK1/2, PTEN and p70S6K signaling pathways in arsenite-induced autophagy. Toxicol Lett 2015; 239:172-81. [PMID: 26432159 DOI: 10.1016/j.toxlet.2015.09.022] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 09/25/2015] [Accepted: 09/27/2015] [Indexed: 12/19/2022]
Abstract
Studies show that arsenite induces oxidative stress and modifies cellular function via phosphorylation of proteins and inhibition of DNA repair enzymes. Autophagy, which has multiple physiological and pathological roles in cellular function, is initiated by oxidative stress and is regulated by the signaling pathways of phosphatidylinositol 3-phosphate kinase (PI3K)/mammalian target of rapamycin (mTOR)/p70S6 kinase (p70S6K) and extracellular signaling-regulated protein kinase 1/2 (ERK1/2) that play important roles in oncogenesis. However, the effects of arsenite-induced oxidative stress on autophagy and on expression of related proteins are not fully understood. This study found that cells treated with sodium arsenite had reduced 8-oxoguanine DNA glycosylase 1 (OGG1) and increased 8-hydroxy-2'-deoxyguanosine (8-OHdG) and activating transcription factor (ATF) 3 in SV-40 immortalized human uroepithelial (SV-HUC-1) cells. Arsenite also increased the number of autophagosomes and increased levels of the autophagy markers Beclin-1 and microtubule-associated protein 1 light chain 3B. Reactive oxygen species scavenger decreased arsenite-induced autophagy in SV-HUC-1 cells. Our previous work showed that arsenite induced phosphorylation of the ERK1/2 signaling pathway. The current study further showed that arsenite decreased phosphatase and tensin homologue (PTEN) levels and increased phospho-p70S6 kinase (p-p70S6K) in SV-HUC-1 cells. However, both kinase inhibitor U0126 and the DNA (cytosine-5-)-methyltransferase 1 (DNMT1) inhibitor 5-aza-deoxycytidine abolished the effect of arsenite on expressions of PTEN and p-p70S6K. These results show that autophagy induced by arsenite exposure is mediated by oxidative stress, which regulates activation of the PTEN, p70S6K and ERK1/2 signaling pathways. Thus, this study clarifies the role of autophagy in arsenite-induced urothelial carcinogenesis.
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Affiliation(s)
- Ya-Chun Huang
- Department of Pathology, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hsin-Su Yu
- Department of Dermatology, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Dermatology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chee-Yin Chai
- Department of Pathology, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung, Taiwan.
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Wu J, Zhao F, Zhao Y, Guo Z. Mitochondrial reactive oxygen species and complex II levels are associated with the outcome of hepatocellular carcinoma. Oncol Lett 2015; 10:2347-2350. [PMID: 26622849 DOI: 10.3892/ol.2015.3621] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 07/28/2015] [Indexed: 01/11/2023] Open
Abstract
In the present study, two oxidative stress parameters, reactive oxygen species (ROS) and mitochondrial respiratory complex II, were evaluated in the mitochondria of hepatocellular carcinoma (HCC) cells to determine the association between these parameters and the carcinogenesis and clinical outcome of HCC. High levels of ROS and low levels of complex II were found to be associated with reduced post-operative survival in HCC patients using the log-rank test. Furthermore, multivariate analysis confirmed that the levels of ROS [relative risk (RR)=2.867; 95% confidence interval (CI), 1.062-7.737; P=0.038] and complex II (RR=5.422; 95% CI, 1.273-23.088; P=0.022) were independent predictors for the survival of patients with HCC. Therefore, the analysis of ROS and complex II levels may provide a useful research and therapeutic tool for the prediction of HCC prognosis and treatment.
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Affiliation(s)
- Jianhua Wu
- Experimental Animal Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Fei Zhao
- Department of Gastroenterology and Hepatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Yufei Zhao
- Department of Gastroenterology and Hepatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Zhanjun Guo
- Department of Gastroenterology and Hepatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
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Yao R, Zhou Y, He Y, Jiang Y, Liu P, Ye L, Zheng Z, Lau WB, Cao Y, Zeng Z. Adiponectin protects against paraquat-induced lung injury by attenuating oxidative/nitrative stress. Exp Ther Med 2014; 9:131-136. [PMID: 25452788 PMCID: PMC4247297 DOI: 10.3892/etm.2014.2073] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Accepted: 09/11/2014] [Indexed: 02/05/2023] Open
Abstract
The specific mechanisms underlying paraquat (PQ)-induced lung injury remain unknown, which limits understanding of its cytotoxic potential. Although oxidative stress has been established as an important mechanism underlying PQ toxicity, multiple antioxidants have proven ineffective in attenuating the deleterious effects of PQ. Adiponectin, which shows anti-oxidative and antinitrative effects, may have the potential to reduce PQ-mediated injury. The present study determined the protective action of globular domain adiponectin (gAd) on PQ-induced lung injury, and attempted to elucidate the underlying mechanism or mechanisms of action. BALB/c mice were administered PQ, with and without 12 or 36 h of gAd pre-treatment. The pulmonary oxidative/nitrative status was assessed by measuring pulmonary O2•−, superoxide dismutase (SOD), malondialdehyde (MDA), nitric oxide (NO) and 8-hydroxy-2-dydeoxy guanosine (8-OHdG) production, and blood 3-Nitrotyrosine (3-NT). At a dose of 20 mg/kg, PQ markedly increased O2•−, SOD, MDA, NO and 8-OHdG production 3 h post-administration, but did not significantly increase 3-NT levels until 12 h. gAd inhibited these changes in a dose-dependent manner, via transient activation of MDA, followed by attenuation of MDA formation from 6 h onwards. Histological analysis demonstrated that gAd decreased interstitial edema and inflammatory cell infiltration. These results suggest that gAd protects against PQ-induced lung injury by mitigating oxidative/nitrative stress. Furthermore, gAd may be a potential therapeutic agent for PQ-induced lung injury, and further pharmacological studies are therefore warranted.
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Affiliation(s)
- Rong Yao
- Department of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yaxiong Zhou
- Department of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yarong He
- Department of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yaowen Jiang
- Department of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Peng Liu
- Department of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Lei Ye
- Department of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Zhijie Zheng
- Electrocardiogram Department, No.4 West China Teaching Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Wayne Bond Lau
- Department of Emergency Medicine, Thomas Jefferson University Hospital, Philadelphia, PA 19107, USA
| | - Yu Cao
- Department of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Zhi Zeng
- Department of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
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Yang S, Wu H, Zhao J, Wu X, Zhao J, Ning Q, Xu Y, Xie J. Feasibility of 8-OHdG formation and hOGG1 induction in PBMCs for assessing oxidative DNA damage in the lung of COPD patients. Respirology 2014; 19:1183-90. [PMID: 25154311 DOI: 10.1111/resp.12378] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 05/06/2014] [Accepted: 06/27/2014] [Indexed: 02/04/2023]
Abstract
BACKGROUND AND OBJECTIVE Oxidative stress has long been recognized to play a role in chronic obstructive pulmonary disease (COPD); however, approaches for assessing oxidative stress are lacking. The objective of this study was to address the feasibility of measuring 8-oxo-7, 8-dihydro-2'-deoxyguanosine (8-OHdG) formation and human 8-oxoguanine DNA glycosylase (hOGG1) induction in peripheral blood mononuclear cell (PBMC) to assess oxidative deoxyribonucleic acid (DNA) damage in the lung of smoking COPD patients. METHODS PBMC were obtained from 412 participants including 129 smokers with COPD, 143 healthy smokers and 140 healthy non-smokers. Lung tissue specimens and PBMC were obtained from smoker COPD (n = 12), healthy smokers (n = 12) and healthy non-smokers (n = 10). 8-OHdG and hOGG1 were detected, and correlation analysis was conducted for assessing the feasibility. RESULTS Oxidative DNA damage (8-OHdG formation) along with impaired induction of hOGG1 expression in the lung was a prominent feature for smokers COPD patients. PBMC originated from smokers COPD patients also displayed similar features to that of lung tissues. Correlation analysis suggests that PBMC could be used as a surrogate for oxidative DNA damage in lung of smokers COPD patients. Indeed, 8-OHdG levels in PBMC DNA were negatively correlated with lung function, while hOGG1 induction in PBMC was associated with improved lung function in smokers COPD patients. CONCLUSIONS COPD patients manifest oxidative DNA damage of 8-OHdG along with impaired hOGG1 expression in the lung, whereas 8-OHdG formation and hOGG1 induction in PBMC could be a biomarker of oxidative DNA damage in the lung.
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Affiliation(s)
- Shifang Yang
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Abstract
Evolution has favored the utilization of dioxygen (O2) in the development of complex multicellular organisms. O2 is actually a toxic mutagenic gas that is highly oxidizing and combustible. It is thought that plants are largely to blame for polluting the earth's atmosphere with O2 owing to the development of photosynthesis by blue-green algae over 2 billion years ago. The rise of the plants and atmospheric O2 levels placed evolutionary stress on organisms to adapt or become extinct. This implies that all the surviving creatures on our planet are mutants that have adapted to the "abnormal biology" of O2. Much of the adaptation to the presence of O2 in biological systems comes from well-coordinated antioxidant and repair systems that focus on converting O2 to its most reduced form, water (H2O), and the repair and replacement of damaged cellular macromolecules. Biological systems have also harnessed O2's reactive properties for energy production, xenobiotic metabolism, and host defense and as a signaling messenger and redox modulator of a number of cell signaling pathways. Many of these systems involve electron transport systems and offer many different mechanisms by which antioxidant therapeutics can alternatively produce an antioxidant effect without directly scavenging oxygen-derived reactive species. It is likely that each agent will have a different set of mechanisms that may change depending on the model of oxidative stress, organ system, or disease state. An important point is that all biological processes of aerobes have coevolved with O2 and this creates a Pandora's box for trying to understand the mechanism(s) of action of antioxidants being developed as therapeutic agents.
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Affiliation(s)
- Brian J Day
- Department of Medicine, National Jewish Health, Denver, CO 80206, USA.
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25
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Multiwall carbon nanotube paste electrode with 3,4-dihydroxy-cinnamic acid as mediator for the determination of glutathione in pharmaceutical and urine samples. CHINESE JOURNAL OF CATALYSIS 2013. [DOI: 10.1016/s1872-2067(12)60661-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Mazloum-Ardakani M, Sheikh-Mohseni MA, Mirjalili BF. Selective and Simultaneous Voltammetric Determination of Glutathione, Uric Acid and Penicillamine by a Modified Carbon Nanotube Paste Electrode. ELECTROANAL 2013. [DOI: 10.1002/elan.201300151] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Yardim-Akaydin S, Caliskan-Can E, Gökalp F, Firat H, Ardiç S, Simsek B. Lipid peroxidation and DNA damage in apnea patients with or without metabolic syndrome. Sleep Biol Rhythms 2013. [DOI: 10.1111/sbr.12012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sevgi Yardim-Akaydin
- Department of Biochemistry; Faculty of Pharmacy; Gazi University; Ankara; Turkey
| | - Emel Caliskan-Can
- Department of Biochemistry; Faculty of Pharmacy; Gazi University; Ankara; Turkey
| | - Firat Gökalp
- Department of Biochemistry; Faculty of Pharmacy; Gazi University; Ankara; Turkey
| | - Hikmet Firat
- Department of Chest Diseases; Sleep Disorders Diagnosis and Treatment Center; Ministry of Health Diskapi Yildirim Beyazit and Training and Research Hospital; Ankara; Turkey
| | - Sadik Ardiç
- Department of Chest Diseases; Sleep Disorders Diagnosis and Treatment Center; Ministry of Health Diskapi Yildirim Beyazit and Training and Research Hospital; Ankara; Turkey
| | - Bolkan Simsek
- Department of Biochemistry; Faculty of Pharmacy; Gazi University; Ankara; Turkey
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28
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Chen Y, Thompson DC, Koppaka V, Jester JV, Vasiliou V. Ocular aldehyde dehydrogenases: protection against ultraviolet damage and maintenance of transparency for vision. Prog Retin Eye Res 2012; 33:28-39. [PMID: 23098688 DOI: 10.1016/j.preteyeres.2012.10.001] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2012] [Revised: 10/04/2012] [Accepted: 10/05/2012] [Indexed: 01/02/2023]
Abstract
Aldehyde dehydrogenase (ALDH) enzymes catalyze the NAD(P)(+)-dependent oxidation of a wide variety of endogenous and exogenous aldehydes to their corresponding acids. Some members of the ALDH superfamily of enzymes are abundantly expressed in the mammalian cornea and lens in a taxon-specific manner. Considered to be corneal and lens crystallins, they confer protective and transparent properties upon these ocular tissues. ALDH3A1 is highly expressed in the cornea of most mammals, with the exception of rabbit that expresses exclusively ALDH1A1 in the cornea. ALDH1A1 is present in both the cornea and lens of several animal species. As a result of their catalytic and non-catalytic functions, ALDH3A1 and ALDH1A1 proteins protect inner ocular tissues from ultraviolet radiation and reactive oxygen-induced damage. In addition, these corneal crystallins contribute to cellular transparency in corneal stromal keratocytes, supporting a structural role of these ALDH proteins. A putative regulatory function of ALDH3A1 on corneal cell proliferation has also been proposed. Finally, the three retinaldehyde dehydrogenases cooperatively mediate retinoic acid signaling during the eye development.
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Affiliation(s)
- Ying Chen
- Department of Pharmaceutical Sciences, Molecular Toxicology and Environmental Health Sciences Program, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver, Aurora, CO 80045, USA
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Narang J, Chauhan N, Jain P, Pundir C. Silver nanoparticles/multiwalled carbon nanotube/polyaniline film for amperometric glutathione biosensor. Int J Biol Macromol 2012; 50:672-8. [DOI: 10.1016/j.ijbiomac.2012.01.023] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Accepted: 01/15/2012] [Indexed: 10/14/2022]
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Tiwari D, Kamble J, Chilgunde S, Patil P, Maru G, Kawle D, Bhartiya U, Joseph L, Vanage G. Clastogenic and mutagenic effects of bisphenol A: An endocrine disruptor. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2012; 743:83-90. [DOI: 10.1016/j.mrgentox.2011.12.023] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 12/03/2011] [Accepted: 12/29/2011] [Indexed: 01/08/2023]
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Butalla AC, Crane TE, Patil B, Wertheim BC, Thompson P, Thomson CA. Effects of a carrot juice intervention on plasma carotenoids, oxidative stress, and inflammation in overweight breast cancer survivors. Nutr Cancer 2012; 64:331-41. [PMID: 22292424 DOI: 10.1080/01635581.2012.650779] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Evidence suggests that higher plasma carotenoid concentrations are protective in relation to breast cancer recurrence. This simple randomized carrot juice intervention study was designed to test the hypothesis that daily intake of 8 ounces of fresh BetaSweet (anthocyanin-rich) or Balero orange carrot juice would increase plasma total carotenoid concentrations to levels previously shown to be associated with reduced breast cancer recurrence. It was hypothesized that regular carrot juice intake would be associated with reductions in oxidative stress (8-iso-PGF2α) and inflammation (thromboxane B2, prostaglandin E2 metabolites, and hsC-reactive protein). Sixty-nine overweight breast cancer survivors consumed fresh carrot juice made from study-provided carrots for 3 wk. Total plasma carotenoids increased by 1.65 and 1.38 umol/L for the BetaSweet and Balero carrot juice, respectively. Rise in total plasma carotenoids for the overall sample was inversely associated with 8-iso-PGFα (OR: 0.13; 95% CI: 0.20 to 0.75; no differences were shown by carrot variety. These results suggest daily intake of fresh carrot juice is a simple and effective approach to increasing plasma total carotenoids and in turn reducing oxidative stress, but not inflammatory markers, in women previously treated for breast cancer.
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Affiliation(s)
- Amy C Butalla
- Department of Nutritional Sciences, University of Arizona, Tucson, Arizona 85721, USA
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32
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Kendzia B, Pesch B, Marczynski B, Lotz A, Welge P, Rihs HP, Brüning T, Raulf-Heimsoth M. Pre- and postshift levels of inflammatory biomarkers and DNA damage in non-bitumen-exposed construction workers-subpopulation of the German Human Bitumen Study. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2012; 75:533-543. [PMID: 22686313 DOI: 10.1080/15287394.2012.675304] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Circadian variations in immune defense and tissue repair may interfere with shift effects of occupational exposure when investigating biomarkers in cross-shift studies. This investigation compared biomarkers of inflammation and DNA damage in 59 nonsmoking and 59 smoking male construction workers pre- (6-10 a.m.) versus postshift (4-7 p.m.). Cellular compositions were analyzed in blood, induced sputum (IS), and nasal lavage fluid (NALF) and soluble inflammatory biomarkers were analyzed in IS and NALF. DNA damage was measured as 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodGuo) adducts and DNA strand breaks (alkaline Comet assay) in white blood cells (WBC). Apoptosis was quantified as percent apoptotic cells by annexin V and 7-amino-actinomycin staining in blood lymphocytes using flow cytometry. In nonsmokers higher preshift than postshift levels of interleukin-8 (IL-8) in IS and more DNA strand breaks were detected. However, more DNA adducts were found postshift. Among smokers, the cellular composition of IS and NALF differed between pre- and postshift samples, in particular more neutrophils pre- than postshift. In contrast, more cells in early apoptosis were observed post shift in both smokers and nonsmokers. These results indicate a potential influence of circadian rhythms on several biomarkers used in epidemiological studies. Data suggest interference with shift-work effects of occupational exposure in cross-shift studies and also the need to consider smoking as a modifying variable.
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Affiliation(s)
- Benjamin Kendzia
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance-Institute of the Ruhr-Universität Bochum (IPA), Bochum, Germany.
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Abstract
The human eye is subjected constantly to oxidative stress due to daily exposure to sunlight, high metabolic activities, and oxygen tension. Reactive oxygen species generated from environmental insults and pathological conditions render the human eye particularly vulnerable to oxidative damage. The ocular surface composed of the tear film, the cornea, and the aqueous humor forms the first physical and biochemical barrier of the eye and plays a pivotal role in combating free radicals. These ocular compartments are enriched in certain antioxidants in the form of metabolic enzymes or small molecules. Such an antioxidant defense system in the ocular surface is essential for the maintenance of redox homeostasis in the eye and protection against oxidative damage. Herein, we review the properties and functions of key constituent antioxidants of the ocular surface.
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Affiliation(s)
- Ying Chen
- Molecular Toxicology and Environmental Health Sciences Program, Department of Pharmaceutical Sciences, University of Colorado Denver, Aurora, CO 80045, USA
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Ultraviolet radiation: cellular antioxidant response and the role of ocular aldehyde dehydrogenase enzymes. Eye Contact Lens 2011; 37:206-13. [PMID: 21670692 DOI: 10.1097/icl.0b013e3182212642] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Solar ultraviolet radiation (UVR) exposes the human eye to near constant oxidative stress. Evidence suggests that UVR is the most important environmental insult leading to the development of a variety of ophthalmoheliosis disorders. UVR-induced reactive oxygen species (ROS) are highly reactive with DNA, proteins, and cellular membranes, resulting in cellular and tissue damage. Antioxidant defense systems present in ocular tissues function to combat ROS and protect the eye from oxidative damage. Important enzymatic antioxidants are the superoxide dismutases, catalase, glutathione peroxidases, glutathione reductase, and members of the aldehyde dehydrogenase (ALDH) superfamily. Glutathione, ascorbic and uric acids, α-tocopherol, nicotinamide-adenine dinucleotide phosphate, and ferritin serve as small molecule, nonenzymatic antioxidants. Ocular tissues have high levels of these antioxidants, which are essential for the maintenance of reduction-oxidation homeostasis in the eye and protection against oxidative damage. ALDH1A1 and ALDH3A1, present abundantly in the cornea and lens, have been shown to have unique roles in the defense against UVR and the downstream effects of oxidative stress. This review presents the properties and functions of ocular antioxidants that play critical roles in the cellular response to UVR exposure, including a focused discussion of the unique roles that the ALDH1A1 and ALDH3A1 enzymes have as multifunctional ocular antioxidants.
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Lee M, Kwon BM, Suk K, McGeer E, McGeer PL. Effects of Obovatol on GSH Depleted Glia-Mediated Neurotoxicity and Oxidative Damage. J Neuroimmune Pharmacol 2011; 7:173-86. [DOI: 10.1007/s11481-011-9300-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Accepted: 07/14/2011] [Indexed: 01/23/2023]
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Sauvain JJ, Setyan A, Wild P, Tacchini P, Lagger G, Storti F, Deslarzes S, Guillemin M, Rossi MJ, Riediker M. Biomarkers of oxidative stress and its association with the urinary reducing capacity in bus maintenance workers. J Occup Med Toxicol 2011; 6:18. [PMID: 21619715 PMCID: PMC3135575 DOI: 10.1186/1745-6673-6-18] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Accepted: 05/30/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Exposure to particles (PM) induces adverse health effects (cancer, cardiovascular and pulmonary diseases). A key-role in these adverse effects seems to be played by oxidative stress, which is an excess of reactive oxygen species relative to the amount of reducing species (including antioxidants), the first line of defense against reactive oxygen species. The aim of this study was to document the oxidative stress caused by exposure to respirable particles in vivo, and to test whether exposed workers presented changes in their urinary levels for reducing species. METHODS Bus depot workers (n = 32) exposed to particles and pollutants (respirable PM4, organic and elemental carbon, particulate metal content, polycyclic aromatic hydrocarbons, NOx, O3) were surveyed over two consecutive days. We collected urine samples before and after each shift, and quantified an oxidative stress biomarker (8-hydroxy-2'-deoxyguanosine), the reducing capacity and a biomarker of PAH exposure (1-hydroxypyrene). We used a linear mixed model to test for associations between the oxidative stress status of the workers and their particle exposure as well as with their urinary level of reducing species. RESULTS Workers were exposed to low levels of respirable PM4 (range 25-71 μg/m3). However, urinary levels of 8-hydroxy-2'-deoxyguanosine increased significantly within each shift and between both days for non-smokers. The between-day increase was significantly correlated (p < 0.001) with the concentrations of organic carbon, NOx, and the particulate copper content. The within-shift increase in 8OHdG was highly correlated to an increase of the urinary reducing capacity (Spearman ρ = 0.59, p < 0.0001). CONCLUSIONS These findings confirm that exposure to components associated to respirable particulate matter causes a systemic oxidative stress, as measured with the urinary 8OHdG. The strong association observed between urinary 8OHdG with the reducing capacity is suggestive of protective or other mechanisms, including circadian effects. Additional investigations should be performed to understand these observations.
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Affiliation(s)
- Jean-Jacques Sauvain
- Institute for Work and Health, University of Lausanne + Geneva, 21 rue du Bugnon, CH-1011 Lausanne, Switzerland
| | - Ari Setyan
- Institute for Work and Health, University of Lausanne + Geneva, 21 rue du Bugnon, CH-1011 Lausanne, Switzerland.,University of California, Davis; Department of Environmental Toxicology, 4422 Meyer Hall, One Shields Avenue, Davis CA 95616 USA
| | - Pascal Wild
- Institute for Work and Health, University of Lausanne + Geneva, 21 rue du Bugnon, CH-1011 Lausanne, Switzerland
| | | | - Grégoire Lagger
- EDEL Therapeutics S.A., PSE-B/EPFL, CH-1015 Lausanne, Switzerland
| | - Ferdinand Storti
- Institute for Work and Health, University of Lausanne + Geneva, 21 rue du Bugnon, CH-1011 Lausanne, Switzerland
| | - Simon Deslarzes
- Institute for Work and Health, University of Lausanne + Geneva, 21 rue du Bugnon, CH-1011 Lausanne, Switzerland
| | - Michel Guillemin
- Institute for Work and Health, University of Lausanne + Geneva, 21 rue du Bugnon, CH-1011 Lausanne, Switzerland
| | - Michel J Rossi
- Paul Scherrer Institute, Laboratory of Atmospheric Chemistry (LAC), CH-5232 Villigen PSI, Switzerland
| | - Michael Riediker
- Institute for Work and Health, University of Lausanne + Geneva, 21 rue du Bugnon, CH-1011 Lausanne, Switzerland
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Wang M, Ma HL, Liu B, Wang HB, Xie H, Li RD, Wang JF. Pinus massoniana bark extract protects against oxidative damage in L-02 hepatic cells and mice. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2011; 38:909-19. [PMID: 20821822 DOI: 10.1142/s0192415x10008342] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The hepatoprotective activity of Pinus massoniana bark extract (PMBE) against hydrogen peroxide (H2O2)-induced damage in normal human liver L-02 cells and carbon tetrachloride (CCl4)-induced acute hepatotoxicity in mice was investigated. The L-02 cells were pre-treated with PMBE for 24 hours prior to exposure to 0.5 mM H2O2 for 3 or 24 hours. The cell viability, level of malondialdehyde (MDA) and glutathione (GSH), and the catalase (CAT) activity were evaluated. For in vivo experiments, mice were divided into groups and PMBE administered orally, after which each group was assigned a further treatment. Histopathological examination, the serum levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), and GSH, the liver tissue levels of MDA and GSH, the activities of CAT and glutathione peroxidase (GSH-Px), were evaluated. PMBE treatment decreased the level of MDA and increased the cell viability, GSH content and CAT activity in H2O2 treated L-02 cells treated for 3 hours. PMBE obviously decreased serum ALT, AST, ALP, and liver tissue MDA, while increasing serum GSH, and liver tissue CAT and GSH-Px activities. In conclusion, PMBE treatment prevents H2O2 and CCl4-induced liver damage, and therefore could have a potential clinical usage.
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Affiliation(s)
- Mei Wang
- The State Key Laboratory of Biocontrol and The Key Laboratory of Gene Engineering of Ministry of Education School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
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Woods JA, Traynor NJ, Brancaleon L, Moseley H. The Effect of Photofrin on DNA Strand Breaks and Base Oxidation in HaCaT Keratinocytes: A Comet Assay Study¶. Photochem Photobiol 2011. [DOI: 10.1111/j.1751-1097.2004.tb09864.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Young O, Crotty T, O'Connell R, O'Sullivan J, Curran AJ. Levels of oxidative damage and lipid peroxidation in thyroid neoplasia. Head Neck 2010; 32:750-6. [PMID: 19998441 DOI: 10.1002/hed.21247] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND This study assessed the presence of oxidative damage and lipid peroxidation in thyroid neoplasia. METHODS Using tissue microarrays and immunohistochemistry, we assessed levels of DNA damage (8-oxo-dG) and lipid peroxidation (4-HNE) in 71 follicular thyroid adenoma (FTA), 45 papillary thyroid carcinoma (PTC), and 17 follicular thyroid carcinoma (FTC) and matched normal thyroid tissue. RESULTS Cytoplasmic 8-oxo-dG and 4-HNE expression was significantly higher in FTA, FTC, and PTC tissue compared to matched normal tissue (all p values < .001). Similarly, elevated nuclear levels of 8-oxo-dG were seen in all in FTA, FTC, and PTC tissue compared to matched normal (p values < .07, < .001, < .001, respectively). In contrast, a higher level of 4-HNE expression was detected in normal thyroid tissue compared with matched tumor tissue (p < .001 for all groups). Comparing all 3 groups, 4-HNE levels were higher than 8-oxo-dG levels (p < .001 for all groups) except that cytoplasmic levels of 8-oxo-dG were higher than 4-HNE in all (p < .001). These results were independent of proliferation status. CONCLUSION High levels of DNA damage and lipid peroxidation in benign and malignant thyroid neoplasia indicates this damage is an early event that may influence disease progression.
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Affiliation(s)
- Orla Young
- Department of Otolaryngology, Head & Neck Surgery, UCD School of Medicine & Medical Science, St Vincent's University Hospital, Elm Park, Dublin
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Prabhulkar S, Li CZ. Assessment of oxidative DNA damage and repair at single cellular level via real-time monitoring of 8-OHdG biomarker. Biosens Bioelectron 2010; 26:1743-9. [PMID: 20863679 DOI: 10.1016/j.bios.2010.08.029] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2010] [Revised: 08/08/2010] [Accepted: 08/12/2010] [Indexed: 02/07/2023]
Abstract
8-Hydroxydeoxyguanosine (8-OHdG) is the most important and best-documented biomarker of oxidative stress, which is involved in the instigation of various diseases. 8-OHdG levels correlate to oxidative DNA damage which is known to be the root cause of a variety of age-related chronic diseases. The purpose of our research was to develop a detection strategy capable of measuring 8-OHdG in real-time at the surface of a single cell. Activated carbon fiber microelectrodes were used as the sensing platform. The microelectrodes were used to measure 8-OHdG release from single lung epithelial cells under the influence of nicotine. In order to evaluate the direct role of nicotine in tobacco induced genotoxicity, we studied the influence of parameters such as nicotine concentration and exposure times on 8-OHdG secretion. 2-8 mM nicotine solutions induced dose-dependent DNA damage in single cells, which was observed via amperometric measurements of secreted 8-OHdG biomarker. Real-time 8-OHdG measurements from single cells exposed to 4 mM nicotine solution revealed cessation of 8-OHdG secretion after 110 min. We have successfully outlined a methodology to detect 8-OHdG at the surface of single cells. A similar protocol can be used to evaluate oxidative DNA damage and repair mechanisms in other disease models.
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Affiliation(s)
- Shradha Prabhulkar
- Nanobioengineering/Bioelectronics Laboratory, Department of Biomedical Engineering, Florida International University, 10555 West Flagler Street, Miami, FL 33174, United States
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Determination of human serum 8-hydroxy-2′-deoxyguanosine (8-OHdG) by HPLC-ECD combined with solid phase extraction (SPE). J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:2163-7. [DOI: 10.1016/j.jchromb.2010.06.015] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Revised: 06/14/2010] [Accepted: 06/14/2010] [Indexed: 11/18/2022]
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Tomasetti M, Santarelli L. Biomarkers for early detection of malignant mesothelioma: diagnostic and therapeutic application. Cancers (Basel) 2010; 2:523-48. [PMID: 24281081 PMCID: PMC3835090 DOI: 10.3390/cancers2020523] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Revised: 04/01/2010] [Accepted: 04/07/2010] [Indexed: 12/30/2022] Open
Abstract
Malignant mesothelioma (MM) is a rare and aggressive tumour of the serosal cavities linked to asbestos exposure. Improved detection methods for diagnosing this type of neoplastic disease are essential for an early and reliable diagnosis and treatment. Thus, focus has been placed on finding tumour markers for the non-invasive detection of MM. Recently, some blood biomarkers have been described as potential indicators of early and advanced MM cancers. The identification of tumour biomarkers alone or in combination could greatly facilitate the surveillance procedure for cohorts of subjects exposed to asbestos, a common phenomenon in several areas of western countries.
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Affiliation(s)
- Marco Tomasetti
- Department of Molecular Pathology and Innovative Therapies, Occupational Medicine, Polytechnic University of Marche, via Tronto 10/A Torrette 60020, Ancona, Italy.
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Nones J, Stipursky J, Costa SL, Gomes FCA. Flavonoids and Astrocytes Crosstalking: Implications for Brain Development and Pathology. Neurochem Res 2010; 35:955-66. [DOI: 10.1007/s11064-010-0144-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/18/2010] [Indexed: 11/28/2022]
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Cooke MS, Evans MD, Mistry N, Lunec J. Role of dietary antioxidants in the prevention of in vivo oxidative DNA damage. Nutr Res Rev 2009; 15:19-42. [PMID: 19087397 DOI: 10.1079/nrr200132] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Epidemiological evidence consistently shows that diets high in fresh fruit and vegetables significantly lower cancer risk. Given the postulated role of oxidative DNA damage in carcinogenesis, the assumption has been made that it is the antioxidant properties of food constituents, such as vitamin C, E and carotenoids, which confer protection. However, epidemiological studies with specific antioxidants, either singly or in combination, have not, on the whole, supported this hypothesis. In contrast, studies examining the in vitro effect of antioxidants upon oxidative DNA damage have generally been supportive, in terms of preventing damage induction. The same, however, cannot be said for the in vivo intervention studies where overall the results have been equivocal. Nevertheless, recent work has suggested that some dietary antioxidants may confer protective properties through a novel mechanism, unrelated to their conventional free-radical scavenging abilities. Upregulation of antioxidant defence, xenobiotic metabolism, or DNA-repair genes may all limit cellular damage and hence promote maintenance of cell integrity. However, until further work has clarified whether dietary supplementation with antioxidants confers a reduced risk of cancer and the mechanism by which this effect is exerted, the recommendation for a diet rich in fruit and vegetables remains valid empirically.
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Affiliation(s)
- M S Cooke
- Oxidative Stress Group, Division of Chemical Pathology, University of Leicester, Robert Kilpatrick Clinical Sciences Building, Leicester Royal Infirmary, University Hospitals of Leicester NHS Trust, Leicester LE2 7LX, UK.
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Davanipour Z, Poulsen HE, Weimann A, Sobel E. Endogenous melatonin and oxidatively damaged guanine in DNA. BMC Endocr Disord 2009; 9:22. [PMID: 19835624 PMCID: PMC2771025 DOI: 10.1186/1472-6823-9-22] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2008] [Accepted: 10/18/2009] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND A significant body of literature indicates that melatonin, a hormone primarily produced nocturnally by the pineal gland, is an important scavenger of hydroxyl radicals and other reactive oxygen species. Melatonin may also lower the rate of DNA base damage resulting from hydroxyl radical attack and increase the rate of repair of that damage. This paper reports the results of a study relating the level of overnight melatonin production to the overnight excretion of the two primary urinary metabolites of the repair of oxidatively damaged guanine in DNA. METHODS Mother-father-daughter(s) families (n = 55) were recruited and provided complete overnight urine samples. Total overnight creatinine-adjusted 6-sulphatoxymelatonin (aMT6s/Cr) has been shown to be highly correlated with total overnight melatonin production. Urinary 8-oxo-7,8-dihydro-guanine (8-oxoGua) results from the repair of DNA or RNA guanine via the nucleobase excision repair pathway, while urinary 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG) may possibly result from the repair of DNA guanine via the nucleotide excision repair pathway. Total overnight urinary levels of 8-oxodG and 8-oxoGua are therefore a measure of total overnight guanine DNA damage. 8-oxodG and 8-oxoGua were measured using a high-performance liquid chromatography-electrospray ionization tandem mass spectrometry assay. The mother, father, and oldest sampled daughter were used for these analyses. Comparisons between the mothers, fathers, and daughters were calculated for aMT6s/Cr, 8-oxodG, and 8-oxoGua. Regression analyses of 8-oxodG and 8-oxoGua on aMT6s/Cr were conducted for mothers, fathers, and daughters separately, adjusting for age and BMI (or weight). RESULTS Among the mothers, age range 42-80, lower melatonin production (as measured by aMT6s/CR) was associated with significantly higher levels of 8-oxodG (p < 0.05), but not with 8-oxoGua. Among the fathers, age range 46-80, lower melatonin production was associated with marginally higher levels of 8-oxoGua (p < 0.07), but not with 8-oxodG. Among the daughters, no relationship was found between melatonin levels and either 8-oxodG or 8-oxoGua levels. When the mother and father data were further analyzed using only subjects older than the oldest daughter, the associations became somewhat stronger. CONCLUSION Low levels of endogenous melatonin production among older individuals may lead to higher levels of oxidatively damaged guanine in DNA, thereby possibly increasing the risk of developing cancer. The possible different effects of melatonin in the rates of utilization of pathways for repair of oxidatively damaged guanine in DNA identified between older women and older men are intriguing.
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Affiliation(s)
- Zoreh Davanipour
- Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago IL 60611, USA
- Friends Research Institute, Los Angeles CA 90064, USA
| | | | | | - Eugene Sobel
- Friends Research Institute, Los Angeles CA 90064, USA
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Quercetin inhibits hydrogen peroxide-induced DNA damage and enhances DNA repair in Caco-2 cells. Food Chem Toxicol 2009; 47:2716-22. [PMID: 19651184 DOI: 10.1016/j.fct.2009.07.033] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2009] [Revised: 07/15/2009] [Accepted: 07/28/2009] [Indexed: 01/12/2023]
Abstract
Flavonoids are known to have antioxidant activity that may limit DNA damage and help prevent degenerative diseases, including cancer. However, our knowledge of flavonoids' role in DNA protection/repair mechanism(s) is limited. This study investigated the effects of quercetin on DNA oxidation and DNA repair in Caco-2 cells with or without oxidant (H2O2) challenge. Quercetin (1, 100 microM) significantly reduced oxidative DNA damage, as measured by the number of single-strand breaks identified by single cell gel electrophoresis. Quercetin treatment also caused a measurable increase in the mRNA expression of human 8-oxoguanine DNA glycosylase (hOGG1) at 0 and 4h after H2O2 treatment (measured using RT-PCR). In addition, the highest level of quercetin tested (100 microM) maintained hOGG1 expression at basal levels or higher for up to 12h after H2O2 treatment, while oxidant treatment alone resulted in significant reduction of hOGG1 at 8h. Our study indicates that quercetin could protect DNA both by reducing oxidative DNA damage and by enhancing DNA repair through modulation of DNA repair enzyme expression.
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Valavanidis A, Vlachogianni T, Fiotakis C. 8-hydroxy-2' -deoxyguanosine (8-OHdG): A critical biomarker of oxidative stress and carcinogenesis. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, ENVIRONMENTAL CARCINOGENESIS & ECOTOXICOLOGY REVIEWS 2009; 27:120-39. [PMID: 19412858 DOI: 10.1080/10590500902885684] [Citation(s) in RCA: 1260] [Impact Index Per Article: 84.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
There is extensive experimental evidence that oxidative damage permanently occurs to lipids of cellular membranes, proteins, and DNA. In nuclear and mitochondrial DNA, 8-hydroxy-2' -deoxyguanosine (8-OHdG) or 8-oxo-7,8-dihydro-2' -deoxyguanosine (8-oxodG) is one of the predominant forms of free radical-induced oxidative lesions, and has therefore been widely used as a biomarker for oxidative stress and carcinogenesis. Studies showed that urinary 8-OHdG is a good biomarker for risk assessment of various cancers and degenerative diseases. The most widely used method of quantitative analysis is high-performance liquid chromatography (HPLC) with electrochemical detection (EC), gas chromatography-mass spectrometry (GC-MS), and HPLC tandem mass spectrometry. In order to resolve the methodological problems encountered in measuring quantitatively 8-OHdG, the European Standards Committee for Oxidative DNA Damage was set up in 1997 to resolve the artifactual oxidation problems during the procedures of isolation and purification of oxidative DNA products. The biomarker 8-OHdG or 8-oxodG has been a pivotal marker for measuring the effect of endogenous oxidative damage to DNA and as a factor of initiation and promotion of carcinogenesis. The biomarker has been used to estimate the DNA damage in humans after exposure to cancer-causing agents, such as tobacco smoke, asbestos fibers, heavy metals, and polycyclic aromatic hydrocarbons. In recent years, 8-OHdG has been used widely in many studies not only as a biomarker for the measurement of endogenous oxidative DNA damage but also as a risk factor for many diseases including cancer.
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Kato I, Ren J, Heilbrun LK, Djuric Z. Intra- and inter-individual variability in measurements of biomarkers for oxidative damagein vivo: Nutrition and Breast Health Study. Biomarkers 2008; 11:143-52. [PMID: 16766390 DOI: 10.1080/13547500600565693] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Oxidative stress has been implicated in the pathogenesis of various chronic diseases, such as cancer, cardiovascular disease and inflammatory conditions, as well as in ageing. Although a number of markers are now available, little is known about the reliability of single measurements of such markers in healthy individuals. The study examined the distribution of variance for three oxidative stress markers, 8-oxo-2'-deoxyguanosine (8-oxodG), 5-hydroxymethyl-2'-deoxyuridine (5-OHmdU) and total 8-isoprostane-F2alpha, which were measured every 3-6 months over 1 year in blood and breast nipple aspirate fluid (NAF) for 103 premenopausal women. For both plasma and NAF, the between-subject variances of 8-isoprostane-F2alpha were consistently greater than the within-subject variances. Consequently, their reliability coefficients were close to the level of those for cholesterol. On the other hand, the within-subject variances were much greater than the between-subjects variances for blood 5-OHmdU, resulting in low reliability coefficients, i.e. <0.3. Overall, the reliability coefficients for blood 8-oxodG were between those of 8-isoprostane-F2alpha and 5-OHmdU, but closer to those of 8-isoprostane-F2alpha. The results suggest that the reliability of oxidative stress markers may vary considerably depending on the type of marker. Caution should be exercised in selecting markers as well as in determining the number of study subjects or the number of samples per subject in a study. There also may be ample room to optimize laboratory techniques to quantify markers of oxidative DNA damage.
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Affiliation(s)
- I Kato
- Barbara Ann Karmanos Cancer Institute and Wayne State University School of Medicine, Detroit, MI 48201, USA.
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Determination of glutathione in hemolysed erythrocyte by flow injection analysis with chemiluminescence detection. J Pharm Biomed Anal 2008; 48:140-4. [DOI: 10.1016/j.jpba.2008.04.028] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2008] [Revised: 04/25/2008] [Accepted: 04/30/2008] [Indexed: 11/15/2022]
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Sowers M, McConnell D, Jannausch ML, Randolph JF, Brook R, Gold EB, Crawford S, Lasley B. Oestrogen metabolites in relation to isoprostanes as a measure of oxidative stress. Clin Endocrinol (Oxf) 2008; 68:806-13. [PMID: 17980014 PMCID: PMC2727613 DOI: 10.1111/j.1365-2265.2007.03108.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Oestradiol (E2) and its metabolites 2-hydroxyoestrone (2-OHE1) and 16alpha-hydroxyoestrone (16alpha-OHE1) are thought to curtail the greater oxidative stress found in the development and progression of disease conditions including atherosclerosis. We related oestrogen levels to F(2a)-isoprostane levels, a biomarker of oxidative stress. DESIGN AND PARTICIPANTS Data were obtained from 1647 women, aged 47-57 years, participating in the fifth annual follow-up of the Study of Women's Health Across the Nation (SWAN), a study of the menopausal transition. MEASUREMENTS Serum E2 and urinary 2-OHE1 and 16alpha-OHE1 concentrations were determined by enzyme-linked immunosorbent assay (ELISA) and urinary F(2a)-isoprostanes were measured by enzyme immunoassay (EIA). RESULTS F(2a)-isoprostane concentrations were elevated in women who smoked, a behaviour associated with increased oxidative stress, but not in stages of the natural menopause. Mean F(2a)-isoprostane concentrations among pre- and postmenopausal women who smoked were 1082 and 1064 pg/ml, respectively, values double those in pre- (343 pg/ml) and postmenopausal (379 pg/ml) nonsmoking women. 2-OHE1 and F(2a)-isoprostane concentrations were positively and highly correlated (partial correlations rho(Y|X) = 0.44 and rho(Y|X) = 0.43 in pre- and postmenopausal women, respectively). Similarly, 16alpha-OHE1 concentrations were positively and highly correlated with F(2a)-isoprostane concentrations (rho(Y|X) = 0.52 and rho(Y|X) = 0.59 in pre- and postmenopausal women, respectively). E2 was significantly correlated with F(2a)-isoprostanes only in postmenopausal women (rho(Y|X) = 0.20). Associations were adjusted for age, body mass index (BMI), race/ethnicity, lipids, physical activity level and alcohol consumption. CONCLUSIONS This study does not support the commonly held hypothesis that levels of endogenous E2 or its oestrone metabolites favourably modify oxidative stress by decreasing F2(a)-isoprostane levels.
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Affiliation(s)
- MaryFran Sowers
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, and Department of Obstetrics and Gynecology, University of Michigan Health Sciences System, Ann Arbor, MI 48104, USA.
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