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Kosmachevskaya OV, Nasybullina EI, Pokidova OV, Sanina NA, Topunov AF. Effects of Nitrosyl Iron Complexes with Thiol, Phosphate, and Thiosulfate Ligands on Hemoglobin. Int J Mol Sci 2024; 25:7194. [PMID: 39000305 PMCID: PMC11241041 DOI: 10.3390/ijms25137194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 06/23/2024] [Accepted: 06/26/2024] [Indexed: 07/16/2024] Open
Abstract
Nitrosyl iron complexes are remarkably multifactorial pharmacological agents. These compounds have been proven to be particularly effective in treating cardiovascular and oncological diseases. We evaluated and compared the antioxidant activity of tetranitrosyl iron complexes (TNICs) with thiosulfate ligands and dinitrosyl iron complexes (DNICs) with glutathione (DNIC-GS) or phosphate (DNIC-PO4-) ligands in hemoglobin-containing systems. The studied effects included the production of free radical intermediates during hemoglobin (Hb) oxidation by tert-butyl hydroperoxide, oxidative modification of Hb, and antioxidant properties of nitrosyl iron complexes. Measuring luminol chemiluminescence revealed that the antioxidant effect of TNICs was higher compared to DNIC-PO4-. DNIC-GS either did not exhibit antioxidant activity or exerted prooxidant effects at certain concentrations, which might have resulted from thiyl radical formation. TNICs and DNIC-PO4- efficiently protected the Hb heme group from decomposition by organic hydroperoxides. DNIC-GS did not exert any protective effects on the heme group; however, it abolished oxoferrylHb generation. TNICs inhibited the formation of Hb multimeric forms more efficiently than DNICs. Thus, TNICs had more pronounced antioxidant activity than DNICs in Hb-containing systems.
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Affiliation(s)
- Olga V Kosmachevskaya
- Bach Institute of Biochemistry, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow 119071, Russia
| | - Elvira I Nasybullina
- Bach Institute of Biochemistry, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow 119071, Russia
| | - Olesya V Pokidova
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Moscow Region, Chernogolovka 142432, Russia
| | - Natalia A Sanina
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Moscow Region, Chernogolovka 142432, Russia
| | - Alexey F Topunov
- Bach Institute of Biochemistry, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow 119071, Russia
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2
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Siarkiewicz P, Luzak B, Michalski R, Artelska A, Szala M, Przygodzki T, Sikora A, Zielonka J, Grzelakowska A, Podsiadły R. Evaluation of a novel pyridinium cation-linked styryl-based boronate probe for the detection of selected inflammation-related oxidants. Free Radic Biol Med 2024; 212:255-270. [PMID: 38122872 DOI: 10.1016/j.freeradbiomed.2023.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/02/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023]
Abstract
Reactive oxygen and nitrogen species (RONS) are a range of chemical individuals produced by living cells that contribute to the proper functioning of organisms. Cells under oxidative and nitrative stress show excessive production of RONS (including hydrogen peroxide, H2O2, hypochlorous acid, HOCl, and peroxynitrite, ONOO-) which may result in a damage proteins, lipids, and genetic material. Thus, the development of probes for in vivo detection of such oxidants is an active area of research, focusing on molecular redox sensors, including boronate-caged fluorophores. Here, we report a boronate-based styryl probe with a cationic pyridinium moiety (BANEP+) for the fluorescent detection of selected biological oxidants in vitro and in vivo. We compare the chemical reactivity of the BANEP+ probe toward H2O2, HOCl, and ONOO- and examine the influence of the major intracellular non-enzymatic antioxidant molecule, glutathione (GSH). We demonstrate that, at the physiologically relevant GSH concentration, the BANEP+ probe is efficiently oxidized by peroxynitrite, forming its phenolic derivative HNEP+. GSH does not affect the fluorescence properties of the BANEP+ and HNEP+ dyes. Finally, we report the identification of a novel type of molecular marker, with the boronate moiety replaced by the iodine atom, formed from the probe in the presence of HOCl and iodide anion. We conclude that the reported chemical reactivity and structural features of the BANEP+ probe may be a basis for the development of new red fluorescent probes for in vitro and in vivo detection of ONOO-.
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Affiliation(s)
- Przemysław Siarkiewicz
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland.
| | - Bogusława Luzak
- Department of Haemostasis and Haemostatic Disorders, Medical University of Lodz, Mazowiecka 6/8, 92-215 Lodz, Poland
| | - Radosław Michalski
- Institute of Applied Radiation Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Angelika Artelska
- Institute of Applied Radiation Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Marcin Szala
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland
| | - Tomasz Przygodzki
- Department of Haemostasis and Haemostatic Disorders, Medical University of Lodz, Mazowiecka 6/8, 92-215 Lodz, Poland
| | - Adam Sikora
- Institute of Applied Radiation Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Jacek Zielonka
- Department of Biophysics, Cancer Center Translational Metabolomics Shared Resource, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, United States
| | - Aleksandra Grzelakowska
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland
| | - Radosław Podsiadły
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland.
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3
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Jomova K, Raptova R, Alomar SY, Alwasel SH, Nepovimova E, Kuca K, Valko M. Reactive oxygen species, toxicity, oxidative stress, and antioxidants: chronic diseases and aging. Arch Toxicol 2023; 97:2499-2574. [PMID: 37597078 PMCID: PMC10475008 DOI: 10.1007/s00204-023-03562-9] [Citation(s) in RCA: 101] [Impact Index Per Article: 101.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Accepted: 07/24/2023] [Indexed: 08/21/2023]
Abstract
A physiological level of oxygen/nitrogen free radicals and non-radical reactive species (collectively known as ROS/RNS) is termed oxidative eustress or "good stress" and is characterized by low to mild levels of oxidants involved in the regulation of various biochemical transformations such as carboxylation, hydroxylation, peroxidation, or modulation of signal transduction pathways such as Nuclear factor-κB (NF-κB), Mitogen-activated protein kinase (MAPK) cascade, phosphoinositide-3-kinase, nuclear factor erythroid 2-related factor 2 (Nrf2) and other processes. Increased levels of ROS/RNS, generated from both endogenous (mitochondria, NADPH oxidases) and/or exogenous sources (radiation, certain drugs, foods, cigarette smoking, pollution) result in a harmful condition termed oxidative stress ("bad stress"). Although it is widely accepted, that many chronic diseases are multifactorial in origin, they share oxidative stress as a common denominator. Here we review the importance of oxidative stress and the mechanisms through which oxidative stress contributes to the pathological states of an organism. Attention is focused on the chemistry of ROS and RNS (e.g. superoxide radical, hydrogen peroxide, hydroxyl radicals, peroxyl radicals, nitric oxide, peroxynitrite), and their role in oxidative damage of DNA, proteins, and membrane lipids. Quantitative and qualitative assessment of oxidative stress biomarkers is also discussed. Oxidative stress contributes to the pathology of cancer, cardiovascular diseases, diabetes, neurological disorders (Alzheimer's and Parkinson's diseases, Down syndrome), psychiatric diseases (depression, schizophrenia, bipolar disorder), renal disease, lung disease (chronic pulmonary obstruction, lung cancer), and aging. The concerted action of antioxidants to ameliorate the harmful effect of oxidative stress is achieved by antioxidant enzymes (Superoxide dismutases-SODs, catalase, glutathione peroxidase-GPx), and small molecular weight antioxidants (vitamins C and E, flavonoids, carotenoids, melatonin, ergothioneine, and others). Perhaps one of the most effective low molecular weight antioxidants is vitamin E, the first line of defense against the peroxidation of lipids. A promising approach appears to be the use of certain antioxidants (e.g. flavonoids), showing weak prooxidant properties that may boost cellular antioxidant systems and thus act as preventive anticancer agents. Redox metal-based enzyme mimetic compounds as potential pharmaceutical interventions and sirtuins as promising therapeutic targets for age-related diseases and anti-aging strategies are discussed.
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Affiliation(s)
- Klaudia Jomova
- Department of Chemistry, Faculty of Natural Sciences, Constantine the Philosopher University in Nitra, Nitra, 949 74, Slovakia
| | - Renata Raptova
- Faculty of Chemical and Food Technology, Slovak University of Technology, Bratislava, 812 37, Slovakia
| | - Suliman Y Alomar
- Zoology Department, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Saleh H Alwasel
- Zoology Department, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Sciences, University of Hradec Kralove, 50005, Hradec Kralove, Czech Republic
| | - Kamil Kuca
- Department of Chemistry, Faculty of Sciences, University of Hradec Kralove, 50005, Hradec Kralove, Czech Republic
| | - Marian Valko
- Faculty of Chemical and Food Technology, Slovak University of Technology, Bratislava, 812 37, Slovakia.
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Fragou F, Theofanous A, Deligiannakis Y, Louloudi M. Nanoantioxidant Materials: Nanoengineering Inspired by Nature. MICROMACHINES 2023; 14:383. [PMID: 36838085 PMCID: PMC9963756 DOI: 10.3390/mi14020383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/14/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Oxidants are very active compounds that can cause damage to biological systems under specific environmental conditions. One effective way to counterbalance these adverse effects is the use of anti-oxidants. At low concentrations, an antioxidant is defined as a compound that can delay, control, or prevent an oxidative process. Antioxidants exist in plants, soil, and minerals; therefore, nature is a rich source of natural antioxidants, such as tocopherols and polyphenols. In nature, antioxidants perform in tandem with their bio-environment, which may tune their activity and protect them from degradation. In vitro use of antioxidants, i.e., out of their biomatrix, may encounter several drawbacks, such as auto-oxidation and polymerization. Artificial nanoantioxidants can be developed via surface modification of a nanoparticle with an antioxidant that can be either natural or synthetic, directly mimicking a natural antioxidant system. In this direction, state-of-the-art nanotechnology has been extensively incorporated to overcome inherent drawbacks encountered in vitro use of antioxidants, i.e., out of their biomatrix, and facilitate the production and use of antioxidants on a larger scale. Biomimetic nanoengineering has been adopted to optimize bio-medical antioxidant systems to improve stability, control release, enhance targeted administration, and overcome toxicity and biocompatibility issues. Focusing on biotechnological sciences, this review highlights the importance of nanoengineering in developing effective antioxidant structures and comparing the effectiveness of different nanoengineering methods. Additionally, this study gathers and clarifies the different antioxidant mechanisms reported in the literature and provides a clear picture of the existing evaluation methods, which can provide vital insights into bio-medical applications.
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Affiliation(s)
- Fotini Fragou
- Laboratory of Biomimetic Catalysis & Hybrid Materials, Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
| | - Annita Theofanous
- Laboratory of Biomimetic Catalysis & Hybrid Materials, Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
| | - Yiannis Deligiannakis
- Laboratory of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina, GR-45110 Ioannina, Greece
| | - Maria Louloudi
- Laboratory of Biomimetic Catalysis & Hybrid Materials, Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
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Sindhu RK, Kaur P, Kaur P, Singh H, Batiha GES, Verma I. Exploring multifunctional antioxidants as potential agents for management of neurological disorders. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:24458-24477. [PMID: 35064486 DOI: 10.1007/s11356-021-17667-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 11/17/2021] [Indexed: 06/14/2023]
Abstract
Free radical or oxidative stress may be a fundamental mechanism underlying several human neurologic diseases. Therapy using free radical scavengers (antioxidants) has the potential to prevent, delay, or ameliorate many neurologic disorders. However, the biochemistry of oxidative pathobiology is complex, and optimum antioxidant therapeutic options may vary and need to be tailored to individual diseases. In vitro and animal model studies support the potential beneficial role of various antioxidant compounds in neurological disease. Antioxidants generally play an important role in reducing or preventing the cell damage and other changes which occur in the cells like mitochondrial dysfunction, DNA mutations, and lipid peroxidation in the cell membrane. Based on their mechanism of action, antioxidants can be used to treat various neurological disorders like Huntington's disease, Alzheimer's disease, and Parkinson's disease. Vitamin E has a scavenging action for reactive oxygen species (ROS) and also prevents the lipid peroxidation. Creatine generally reduces the mitochondrial dysfunction in Parkinson's disease (PD) patients. Various metal chelators are used in PD for the prevention of accumulation of the metals. Superoxidase dismutase (SOD), lipases, and proteases act as repair enzymes in patients with AD. Accordingly, the antioxidant defense system is found to be most useful for treating various neurological disorders.
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Affiliation(s)
- Rakesh K Sindhu
- Chitkara College of Pharmacy, Chitkara University, Punjab, 140401, India.
| | - Prabhjot Kaur
- Chitkara College of Pharmacy, Chitkara University, Punjab, 140401, India
| | - Parneet Kaur
- Chitkara College of Pharmacy, Chitkara University, Punjab, 140401, India
| | - Harmanpreet Singh
- Chitkara College of Pharmacy, Chitkara University, Punjab, 140401, India
| | - Gaber El-Saber Batiha
- Department of Pharmacology and Therapeutics, Faculty of Veterinary Medicine, Damanhour University, Damanhour, 22511, Egypt
| | - Inderjeet Verma
- Department of Pharmacy Practice, M.M. College of Pharmacy, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, 133207, Haryana, India
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6
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Alfieri ML, Cariola A, Panzella L, Napolitano A, d'Ischia M, Valgimigli L, Crescenzi O. Disentangling the Puzzling Regiochemistry of Thiol Addition to o-Quinones. J Org Chem 2022; 87:4580-4589. [PMID: 35266705 PMCID: PMC8981336 DOI: 10.1021/acs.joc.1c02911] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
![]()
The addition of thiol
compounds to o-quinones,
as exemplified by the biologically relevant conjugation of cysteine
to dopaquinone, displays an anomalous 1,6-type regiochemistry compared
to the usual 1,4-nucleophilic addition, for example, by amines, which
has so far eluded intensive investigations. By means of an integrated
experimental and computational approach, herein, we provide evidence
that the addition of glutathione, cysteine, or benzenethiol to 4-methyl-o-benzoquinone, modeling dopaquinone, proceeds by a free
radical chain mechanism triggered by the addition of thiyl radicals
to the o-quinone. In support of this conclusion,
DFT calculations consistently predicted the correct regiochemistry
only for the proposed thiyl radical-quinone addition pathway. These
results would prompt a revision of the commonly accepted mechanisms
for thiol-o-quinone conjugation and stimulate further
work aimed at assessing the impact of the free radical processes in
biologically relevant thiol–quinone interactions.
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Affiliation(s)
- Maria L Alfieri
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 21, Naples I-80126, Italy
| | - Alice Cariola
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via S. Giacomo 11, Bologna I-40126, Italy
| | - Lucia Panzella
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 21, Naples I-80126, Italy
| | - Alessandra Napolitano
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 21, Naples I-80126, Italy
| | - Marco d'Ischia
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 21, Naples I-80126, Italy
| | - Luca Valgimigli
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via S. Giacomo 11, Bologna I-40126, Italy
| | - Orlando Crescenzi
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 21, Naples I-80126, Italy
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7
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Martin CR, Park KC, Leith GA, Yu J, Mathur A, Wilson GR, Gange GB, Barth EL, Ly RT, Manley OM, Forrester KL, Karakalos SG, Smith MD, Makris TM, Vannucci AK, Peryshkov DV, Shustova NB. Stimuli-Modulated Metal Oxidation States in Photochromic MOFs. J Am Chem Soc 2022; 144:4457-4468. [PMID: 35138840 DOI: 10.1021/jacs.1c11984] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Tuning metal oxidation states in metal-organic framework (MOF) nodes by switching between two discrete linker photoisomers via an external stimulus was probed for the first time. On the examples of three novel photochromic copper-based frameworks, we demonstrated the capability of switching between +2 and +1 oxidation states, on demand. In addition to crystallographic methods used for material characterization, the role of the photochromic moieties for tuning the oxidation state was probed via conductivity measurements, cyclic voltammetry, and electron paramagnetic resonance, X-ray photoelectron, and diffuse reflectance spectroscopies. We confirmed the reversible photoswitching activity including photoisomerization rate determination of spiropyran- and diarylethene-containing linkers in extended frameworks, resulting in changes in metal oxidation states as a function of alternating excitation wavelengths. To elucidate the switching process between two states, the photoisomerization quantum yield of photochromic MOFs was determined for the first time. Overall, the introduced noninvasive concept of metal oxidation state modulation on the examples of stimuli-responsive MOFs foreshadows a new pathway for alternation of material properties toward targeted applications.
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Affiliation(s)
- Corey R Martin
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Kyoung Chul Park
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Gabrielle A Leith
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Jierui Yu
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Abhijai Mathur
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Gina R Wilson
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Gayathri B Gange
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Emily L Barth
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Richard T Ly
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Olivia M Manley
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Kelly L Forrester
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Stavros G Karakalos
- College of Engineering and Computing, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Mark D Smith
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Thomas M Makris
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Aaron K Vannucci
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Dmitry V Peryshkov
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Natalia B Shustova
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
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Modiri Gharehveran M, Shah AD. Influence of dissolved organic matter on carbonyl sulfide and carbon disulfide formation from dimethyl sulfide during sunlight photolysis. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:2982-2997. [PMID: 34595800 DOI: 10.1002/wer.1650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/23/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
Carbonyl sulfide (COS) and carbon disulfide (CS2 ) are important atmospheric gases photochemically generated from organic sulfur precursors in sunlit natural waters. This study examined these processes by evaluating COS and CS2 photoproduction from dimethyl sulfide (DMS) in the presence of dissolved organic matter (DOM). DOM was added because it photochemically produces various reactive intermediates (3 CDOM*, • OH, 1 O2 , and H2 O2 ) potentially involved in these reaction pathways. DMS-amended synthetic waters at pH 8 were varied in terms of their DOM type and concentration, spiked with the 3 CDOM* quenching agent, phenol, in certain cases, and subsequently irradiated over varying exposure times. Results indicated that various DOM types ranging from freshwater to open-ocean DOM increased COS but did not alter CS2 , which remained at nondetect levels. DOM type influenced COS only at higher concentrations (20 mg/L), whereas increasing DOM concentrations proportionally increased COS concentrations for all DOM types. Phenol addition lowered COS formation for reasons that remained unclear because phenol likely quenched 3 CDOM* and DMS-derived sulfur-based radicals. Further comparisons with DMS-spiked natural waters and cysteine (CYS)-spiked synthetic and natural waters assessed previously indicated that COS formation from both precursors in natural waters was always greater than in waters containing DOM alone. PRACTITIONER POINTS: DMS- and DOM-spiked synthetic waters formed COS but did not form CS2 during sunlight photolysis. In DMS-spiked synthetic solutions, DOM type has a limited influence on COS formation whereas DOM concentration has a stronger influence on COS formation. COS formation in the DMS-spiked synthetic waters was fairly proportional to the DOC concentration but was generally lower than COS formation in DMS-spiked natural waters.
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Affiliation(s)
| | - Amisha D Shah
- Lyles School of Civil Engineering, Purdue University, West Lafayette, Indiana, USA
- Division of Environmental and Ecological Engineering, Purdue University, West Lafayette, Indiana, USA
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9
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Grachev DI, Shumaev KB, Kosmachevskaya OV, Topunov AF, Ruuge EK. Nitrosyl Comlexes of Hemoglobin in Various Model Systems. Biophysics (Nagoya-shi) 2021. [DOI: 10.1134/s000635092106004x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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10
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Massa CM, Liu Z, Taylor S, Pettit AP, Stakheyeva MN, Korotkova E, Popova V, Atochina-Vasserman EN, Gow AJ. Biological Mechanisms of S-Nitrosothiol Formation and Degradation: How Is Specificity of S-Nitrosylation Achieved? Antioxidants (Basel) 2021; 10:antiox10071111. [PMID: 34356344 PMCID: PMC8301044 DOI: 10.3390/antiox10071111] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/03/2021] [Accepted: 06/08/2021] [Indexed: 01/21/2023] Open
Abstract
The modification of protein cysteine residues underlies some of the diverse biological functions of nitric oxide (NO) in physiology and disease. The formation of stable nitrosothiols occurs under biologically relevant conditions and time scales. However, the factors that determine the selective nature of this modification remain poorly understood, making it difficult to predict thiol targets and thus construct informatics networks. In this review, the biological chemistry of NO will be considered within the context of nitrosothiol formation and degradation whilst considering how specificity is achieved in this important post-translational modification. Since nitrosothiol formation requires a formal one-electron oxidation, a classification of reaction mechanisms is proposed regarding which species undergoes electron abstraction: NO, thiol or S-NO radical intermediate. Relevant kinetic, thermodynamic and mechanistic considerations will be examined and the impact of sources of NO and the chemical nature of potential reaction targets is also discussed.
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Affiliation(s)
- Christopher M. Massa
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ 08848, USA; (C.M.M.); (Z.L.); (S.T.); (A.P.P.)
| | - Ziping Liu
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ 08848, USA; (C.M.M.); (Z.L.); (S.T.); (A.P.P.)
| | - Sheryse Taylor
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ 08848, USA; (C.M.M.); (Z.L.); (S.T.); (A.P.P.)
| | - Ashley P. Pettit
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ 08848, USA; (C.M.M.); (Z.L.); (S.T.); (A.P.P.)
| | - Marena N. Stakheyeva
- RASA Center in Tomsk, Tomsk Polytechnic University, 634050 Tomsk, Russia; (M.N.S.); (E.N.A.-V.)
- Institute of Natural Resources, Tomsk Polytechnic University, Lenin Av. 30, 634050 Tomsk, Russia; (E.K.); (V.P.)
| | - Elena Korotkova
- Institute of Natural Resources, Tomsk Polytechnic University, Lenin Av. 30, 634050 Tomsk, Russia; (E.K.); (V.P.)
| | - Valentina Popova
- Institute of Natural Resources, Tomsk Polytechnic University, Lenin Av. 30, 634050 Tomsk, Russia; (E.K.); (V.P.)
| | - Elena N. Atochina-Vasserman
- RASA Center in Tomsk, Tomsk Polytechnic University, 634050 Tomsk, Russia; (M.N.S.); (E.N.A.-V.)
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Andrew J. Gow
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ 08848, USA; (C.M.M.); (Z.L.); (S.T.); (A.P.P.)
- RASA Center in Tomsk, Tomsk Polytechnic University, 634050 Tomsk, Russia; (M.N.S.); (E.N.A.-V.)
- Correspondence: ; Tel.: +1-848-445-4612
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11
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Shumaev KB, Kosmachevskaya OV, Grachev DI, Timoshin AA, Topunov AF, Lankin VZ, Ruuge EK. [Possible mechanism of antioxidant action of dinitrosyl iron complexes]. BIOMEDIT︠S︡INSKAI︠A︡ KHIMII︠A︡ 2021; 67:162-168. [PMID: 33860774 DOI: 10.18097/pbmc20216702162] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The antioxidant effect of dinitrosyl iron complexes (DNICs) was studied in various model systems. DNICs with glutathione ligands effectively inhibited Cu2+-induced peroxidation of low density lipoproteins (LDL). The antioxidant effect of DNICs with phosphate ligands and free reduced glutathione (GSH) was less pronounced. In addition, DNICs with glutathione suppressed the formation of reactive oxygen species during co-oxidation of lecithin liposomes and glucose. Free radical oxidation in this system was induced with a lipophilic azo initiator and evaluated by luminol-dependent chemiluminescence. NO sharply stimulated chemiluminescence during co-oxidation of glucose and liposomes, thus suggesting the formation of potent oxidants under these conditions. Glutathione DNICs scavenge the superoxide radical anion generated in the xanthine-xanthine oxidase system. Superoxide production was assessed by lucigenin-dependent chemiluminescence and electron paramagnetic resonance (EPR) spectroscopy. Chemiluminescence revealed the dose-dependent character of antiradical effect of glutathione DNICs; moreover, these complexes turned out to be more efficient than GSH. EPR spectra of the adducts of the DEPMPO spin trap with free radicals suggest that the interaction of glutathione DNICs and superoxide does not result in the formation of the thiyl radical of glutathione. Here we propose a mechanism of the antioxidant action of glutathione DNICs, suggesting that unstable intermediate complexes are formed upon their interaction with superoxide or lipid radicals. Further, as a result of intramolecular rearrangement, these intermediates decompose without the free radical as the by-products.
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Affiliation(s)
- K B Shumaev
- Research Center of Biotechnology of the Russian Academy of Sciences, Bach Institute of Biochemistry, Moscow, Russia; National Medical Research Centre for Cardiology, Moscow, Russia
| | - O V Kosmachevskaya
- Research Center of Biotechnology of the Russian Academy of Sciences, Bach Institute of Biochemistry, Moscow, Russia
| | - D I Grachev
- National Medical Research Centre for Cardiology, Moscow, Russia; Lomonosov Moscow State University, Faculty of Physics, Moscow, Russia
| | - A A Timoshin
- National Medical Research Centre for Cardiology, Moscow, Russia
| | - A F Topunov
- Research Center of Biotechnology of the Russian Academy of Sciences, Bach Institute of Biochemistry, Moscow, Russia
| | - V Z Lankin
- National Medical Research Centre for Cardiology, Moscow, Russia
| | - E K Ruuge
- National Medical Research Centre for Cardiology, Moscow, Russia; Lomonosov Moscow State University, Faculty of Physics, Moscow, Russia
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12
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Li R, Dong H, Tian R, Chen J, Xie Q. Activation of sulfite by different Fe0-based nanomaterials for oxidative removal of sulfamethazine in aqueous solution. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117230] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Rashdan NA, Shrestha B, Pattillo CB. S-glutathionylation, friend or foe in cardiovascular health and disease. Redox Biol 2020; 37:101693. [PMID: 32912836 PMCID: PMC7767732 DOI: 10.1016/j.redox.2020.101693] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 08/12/2020] [Accepted: 08/16/2020] [Indexed: 12/27/2022] Open
Abstract
Glutathione is a low molecular weight thiol that is present at high levels in the cell. The high levels of glutathione in the cell make it one of the most abundant antioxidants contributing to cellular redox homeostasis. As a general rule, throughout cardiovascular disease and progression there is an imbalance in redox homeostasis characterized by reactive oxygen species overproduction and glutathione underproduction. As research into these imbalances continues, glutathione concentrations are increasingly being observed to drive various physiological and pathological signaling responses. Interestingly in addition to acting directly as an antioxidant, glutathione is capable of post translational modifications (S-glutathionylation) of proteins through both chemical interactions and enzyme mediated events. This review will discuss both the chemical and enzyme-based S-glutathionylation of proteins involved in cardiovascular pathologies and angiogenesis.
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Affiliation(s)
- N A Rashdan
- Department of Cellular and Molecular Physiology, Louisiana State Health Science Center, Shreveport, LA, USA
| | - B Shrestha
- Department of Cellular and Molecular Physiology, Louisiana State Health Science Center, Shreveport, LA, USA
| | - C B Pattillo
- Department of Cellular and Molecular Physiology, Louisiana State Health Science Center, Shreveport, LA, USA.
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14
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Modiri Gharehveran M, Hain E, Blaney L, Shah AD. Influence of dissolved organic matter on carbonyl sulfide and carbon disulfide formation from cysteine during sunlight photolysis. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2020; 22:1852-1864. [PMID: 32966465 DOI: 10.1039/d0em00219d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Carbonyl sulfide (COS) and carbon disulfide (CS2) are important atmospheric gases that are formed from organic sulfur precursors present in natural waters when exposed to sunlight. However, it remains unclear how specific water constituents, such as dissolved organic matter (DOM), affect COS and CS2 formation. To better understand the role of DOM, irradiation experiments were conducted in O2-free synthetic waters containing four different DOM isolates, acquired from freshwater to open ocean sources, and the sulfur-based amino acid, cysteine (CYS). CYS is a known natural precursor of COS and CS2. Results indicated that COS formation did not vary strongly with DOM type, although small impacts were observed on the kinetic patterns. COS formation also increased with increasing CYS concentration but decreased with increasing DOM concentration. Quenching experiments indicated that ˙OH was not involved in the rate-limiting step of COS formation, whereas excited triplet states of DOM (3CDOM*) were plausibly involved, although the quenching agents used to remove 3CDOM* may have reacted with the CYS-derived intermediates as well. CS2 was not formed under any of the experimental conditions. Overall, DOM-containing synthetic waters had a limited to no effect towards forming COS and CS2, especially when compared to the higher concentrations formed in sunlit natural waters, as examined previously. The reasons behind this limited effect need to be explored further but may be due to the additional water quality constituents present in these natural waters. The findings of this study imply that multiple variables beyond DOM govern COS and CS2 photoproduction when moving from freshwaters to open ocean waters.
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Affiliation(s)
| | - Ethan Hain
- Department of Chemical, Biochemical and Environmental Engineering, University of Maryland Baltimore County, Baltimore, MD, USA
| | - Lee Blaney
- Department of Chemical, Biochemical and Environmental Engineering, University of Maryland Baltimore County, Baltimore, MD, USA
| | - Amisha D Shah
- Lyles School of Civil Engineering, Purdue University, West Lafayette, Indiana, USA. and Division of Environmental and Ecological Engineering, Purdue University, West Lafayette, Indiana, USA
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15
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Zhang WY, Banerjee S, Hughes GM, Bridgewater HE, Song JI, Breeze BG, Clarkson GJ, Coverdale JPC, Sanchez-Cano C, Ponte F, Sicilia E, Sadler PJ. Ligand-centred redox activation of inert organoiridium anticancer catalysts. Chem Sci 2020; 11:5466-5480. [PMID: 34094073 PMCID: PMC8159363 DOI: 10.1039/d0sc00897d] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 04/21/2020] [Indexed: 12/14/2022] Open
Abstract
Organometallic complexes with novel activation mechanisms are attractive anticancer drug candidates. Here, we show that half-sandwich iodido cyclopentadienyl iridium(iii) azopyridine complexes exhibit potent antiproliferative activity towards cancer cells, in most cases more potent than cisplatin. Despite their inertness towards aquation, these iodido complexes can undergo redox activation by attack of the abundant intracellular tripeptide glutathione (GSH) on the chelated azopyridine ligand to generate paramagnetic intermediates, and hydroxyl radicals, together with thiolate-bridged dinuclear iridium complexes, and liberate reduced hydrazopyridine ligand. DFT calculations provided insight into the mechanism of this activation. GS- attack on the azo bond facilitates the substitution of iodide by GS-, and leads to formation of GSSG and superoxide if O2 is present as an electron-acceptor, in a largely exergonic pathway. Reactions of these iodido complexes with GSH generate Ir-SG complexes, which are catalysts for GSH oxidation. The complexes promoted elevated levels of reactive oxygen species (ROS) in human lung cancer cells. This remarkable ligand-centred activation mechanism coupled to redox reactions adds a new dimension to the design of organoiridium anticancer prodrugs.
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Affiliation(s)
- Wen-Ying Zhang
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | - Samya Banerjee
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | - George M Hughes
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | | | - Ji-Inn Song
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | - Ben G Breeze
- Spectroscopy Research Technology Platform, University of Warwick Coventry CV4 7AL UK
| | - Guy J Clarkson
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | | | | | - Fortuna Ponte
- Department of Chemistry and Chemical Technologies, University of Calabria via Pietro Bucci 87036 Arcavacata di Rende Cs Italy
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, University of Calabria via Pietro Bucci 87036 Arcavacata di Rende Cs Italy
| | - Peter J Sadler
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
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16
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Ozkan A, Parlak H, Agar A, Özsoy Ö, Tanriover G, Dilmac S, Turgut E, Yargicoglu P. The Effect of Sodium Metabisulphite on Apoptosis in the Experimental Model of Parkinson’s Disease. CURRENT NUTRITION & FOOD SCIENCE 2020. [DOI: 10.2174/1573401314666180503153444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
The aim of this study was to investigate the mechanisms underlying possible
toxic effects of sulphite on neurodegeneration.
Methods:
Male Wistar rats were assigned to each of the four groups: Control (Control),
Sulphite-treated (Sulphite), 6-hydroxydopamine (6-OHDA)-injected (6-OHDA), and sulphite-treated
and 6-OHDA-injected (6-OHDA+Sulphite). Sodium metabisulphite was administered orally by
gavage at a dose of 100 mg/kg/day for 45 days. Experimental PD was created stereotactically via the
unilateral infusion of 6-OHDA into the medial forebrain bundle (MFB). Rotarod performances,
plasma S-sulfonate levels, caspase-3 activities, Bax and Bcl-2 levels, tyrosine hydroxylase (TH) and
cleaved caspase-3 double staining were investigated.
Results:
The rotarod test showed that the 6-OHDA-injected animals exhibited shorter time on the rod
mile compared to the control group; however, there was no difference between 6-OHDA and
6-OHDA+Sulphite groups. Plasma levels of S-sulfonate in Sulphite and 6-OHDA+ Sulphite groups
increased in contrast to their corresponding control groups. Caspase-3 enzyme activity increased in the
6-OHDA group whereas it did not in control. However, sulphite treatment did not affect these activity
levels. Anti-apoptotic protein Bcl-2 concentration decreased, but the concentration of pro-apoptotic
protein Bax increased in the 6-OHDA group compared to the control group. The expression of
caspase-3 increased, while the number of tyrosine hydroxylase (TH)-positive neurons decreased in
6-OHDA group as compared to the control groups. However, sulphite treatment had no effect on these
parameters.
Conclusion:
Sulphite is not a potentially aggravating factor for the activity of caspase-3 in a 6-
OHDA-induced experimental model of Parkinson’s disease.
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Affiliation(s)
- Ayse Ozkan
- Department of Physiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Hande Parlak
- Department of Physiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Aysel Agar
- Department of Physiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Özlem Özsoy
- Department of Physiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Gamze Tanriover
- Department of Histology and Embryology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Sayra Dilmac
- Department of Histology and Embryology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Eylem Turgut
- Department of Physiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Piraye Yargicoglu
- Department of Biophysics, Faculty of Medicine, Akdeniz University, Antalya, Turkey
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17
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Chen Z, Liu C, Liu J, Li J, Xi S, Chi X, Xu H, Park IH, Peng X, Li X, Yu W, Liu X, Zhong L, Leng K, Huang W, Koh MJ, Loh KP. Cobalt Single-Atom-Intercalated Molybdenum Disulfide for Sulfide Oxidation with Exceptional Chemoselectivity. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1906437. [PMID: 31777990 DOI: 10.1002/adma.201906437] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/12/2019] [Indexed: 06/10/2023]
Abstract
The identification of chemoselective oxidation process en route to fine chemicals and specialty chemicals is a long-standing pursuit in chemical synthesis. A vertically structured, cobalt single atom-intercalated molybdenum disulfide catalyst (Co1 -in-MoS2 ) is developed for the chemoselective transformation of sulfides to sulfone derivatives. The single-atom encapsulation alters the electron structure of catalyst owing to confinement effect and strong metal-substrate interaction, thus enhancing adsorption of sulfides and chemoselective oxidation at the edge sites of MoS2 to achieve excellent yields of up to 99% for 34 examples. The synthetic scopes can be extended to sulfide-bearing alkenes, alkynes, aldehydes, ketones, boronic esters, and amines derivatives as a toolbox for the synthesis of high-value, multifunctional sulfones and late-stage functionalization of pharmaceuticals, e.g., Tamiflu. The synthetic utility of cobalt single atom-intercalated MoS2 , together with its reusability, scalability, and simplified purification process, renders it promising for industrial productions.
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Affiliation(s)
- Zhongxin Chen
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Cuibo Liu
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
- Department of Chemistry, Institute of Molecular Plus, School of Science, Tianjin University, Tianjin, 300072, China
| | - Jia Liu
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Jing Li
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Shibo Xi
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore, 627833, Singapore
| | - Xiao Chi
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Haisen Xu
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - In-Hyeok Park
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Xinwen Peng
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Xing Li
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Wei Yu
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Xiaowang Liu
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Linxin Zhong
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Kai Leng
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Wei Huang
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Ming Joo Koh
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Kian Ping Loh
- Department of Chemistry and Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
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18
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Shumaev KB, Gorudko IV, Kosmachevskaya OV, Grigorieva DV, Panasenko ОM, Vanin AF, Topunov AF, Terekhova MS, Sokolov AV, Cherenkevich SN, Ruuge EK. Protective Effect of Dinitrosyl Iron Complexes with Glutathione in Red Blood Cell Lysis Induced by Hypochlorous Acid. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:2798154. [PMID: 31089406 PMCID: PMC6476047 DOI: 10.1155/2019/2798154] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Revised: 11/15/2018] [Accepted: 01/27/2019] [Indexed: 01/05/2023]
Abstract
Hypochlorous acid (HOCl), one of the major precursors of free radicals in body cells and tissues, is endowed with strong prooxidant activity. In living systems, dinitrosyl iron complexes (DNIC) with glutathione ligands play the role of nitric oxide donors and possess a broad range of biological activities. At micromolar concentrations, DNIC effectively inhibit HOCl-induced lysis of red blood cells (RBCs) and manifest an ability to scavenge alkoxyl and alkylperoxyl radicals generated in the reaction of HOCl with tert-butyl hydroperoxide. DNIC proved to be more effective cytoprotective agents and organic free radical scavengers in comparison with reduced glutathione (GSH). At the same time, the kinetics of HOCl-induced oxidation of glutathione ligands in DNIC is slower than in the case of GSH. HOCl-induced oxidative conversions of thiolate ligands cause modification of DNIC, which manifests itself in inclusion of other ligands. It is suggested that the strong inhibiting effect of DNIC with glutathione on HOCl-induced lysis of RBCs is determined by their antioxidant and regulatory properties.
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Affiliation(s)
- Konstantin B. Shumaev
- Research Center of Biotechnology of the Russian Academy of Sciences, Bach Institute of Biochemistry, Moscow 119071, Russia
- National Medical Research Centre for Cardiology, Moscow 121552, Russia
| | | | - Olga V. Kosmachevskaya
- Research Center of Biotechnology of the Russian Academy of Sciences, Bach Institute of Biochemistry, Moscow 119071, Russia
| | | | - Оleg M. Panasenko
- Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow 119435, Russia
- Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Anatoly F. Vanin
- Russian Academy of Sciences, Semenov Institute of Chemical Physics, Moscow 119991, Russia
| | - Alexey F. Topunov
- Research Center of Biotechnology of the Russian Academy of Sciences, Bach Institute of Biochemistry, Moscow 119071, Russia
| | | | - Alexey V. Sokolov
- Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow 119435, Russia
- Institute of Experimental Medicine, Saint Petersburg 197376, Russia
| | | | - Enno K. Ruuge
- National Medical Research Centre for Cardiology, Moscow 121552, Russia
- Lomonosov Moscow State University, Faculty of Physics, Moscow 119234, Russia
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19
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Shumaev KB, Dudylina AL, Ivanova MV, Pugachenko IS, Ruuge EK. Dinitrosyl iron complexes: Formation and antiradical action in heart mitochondria. Biofactors 2018; 44:237-244. [PMID: 29469215 DOI: 10.1002/biof.1418] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 01/25/2018] [Indexed: 02/02/2023]
Abstract
Mitochondria are widely known as a major source of reactive oxygen and nitrogen species for the cardiovascular system. Numerous studies established that superoxide anion radical production by heart mitochondria is only slightly suppressed under conditions of deep hypoxia, but is completely blocked under anoxia. It was found also that dinitrosyl iron complexes (DNIC) compare favourably with other physiologically active derivatives of nitric oxide (NO). DNIC with glutathione effectively scavenge superoxide radicals generated by mitochondria at different partial pressures of oxygen. Under conditions of simulated hypoxia, the synthesis of thiol-containing DNIC takes place in mitochondria and is concomitant with a significant decrease in the concentration of NO metabolites at the reoxygenation step. Free NO required for DNIC synthesis is generated in the reaction of S-nitrosothiols with superoxide or during single-electron oxidation of the nitroxyl radical (HNO) by coenzyme Q. Plausible mechanisms of antiradical effects of DNIC and their protective role in oxidative stress induced by hypoxia/reoxygenation of myocardial tissues are considered. © 2018 BioFactors, 44(3):237-244, 2018.
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Affiliation(s)
- Konstantin B Shumaev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, 119071, Russia
- National Medical Research Centre for Cardiology, Moscow, 121552, Russia
| | - Arina L Dudylina
- Faculty of Physics, Lomonosov Moscow State University, Moscow, 119234, Russia
| | - Marina V Ivanova
- National Medical Research Centre for Cardiology, Moscow, 121552, Russia
| | - Igor S Pugachenko
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, 119071, Russia
| | - Enno K Ruuge
- National Medical Research Centre for Cardiology, Moscow, 121552, Russia
- Faculty of Physics, Lomonosov Moscow State University, Moscow, 119234, Russia
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20
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El-Amine R, Germini D, Zakharova VV, Tsfasman T, Sheval EV, Louzada RAN, Dupuy C, Bilhou-Nabera C, Hamade A, Najjar F, Oksenhendler E, Lipinski M, Chernyak BV, Vassetzky YS. HIV-1 Tat protein induces DNA damage in human peripheral blood B-lymphocytes via mitochondrial ROS production. Redox Biol 2017; 15:97-108. [PMID: 29220699 PMCID: PMC5725280 DOI: 10.1016/j.redox.2017.11.024] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 10/25/2017] [Accepted: 11/27/2017] [Indexed: 12/12/2022] Open
Abstract
Human immunodeficiency virus (HIV) infection is associated with B-cell malignancies in patients though HIV-1 is not able to infect B-cells. The rate of B-cell lymphomas in HIV-infected individuals remains high even under the combined antiretroviral therapy (cART) that reconstitutes the immune function. Thus, the contribution of HIV-1 to B-cell oncogenesis remains enigmatic. HIV-1 induces oxidative stress and DNA damage in infected cells via multiple mechanisms, including viral Tat protein. We have detected elevated levels of reactive oxygen species (ROS) and DNA damage in B-cells of HIV-infected individuals. As Tat is present in blood of infected individuals and is able to transduce cells, we hypothesized that it could induce oxidative DNA damage in B-cells promoting genetic instability and malignant transformation. Indeed, incubation of B-cells isolated from healthy donors with purified Tat protein led to oxidative stress, a decrease in the glutathione (GSH) levels, DNA damage and appearance of chromosomal aberrations. The effects of Tat relied on its transcriptional activity and were mediated by NF-κB activation. Tat stimulated oxidative stress in B-cells mostly via mitochondrial ROS production which depended on the reverse electron flow in Complex I of respiratory chain. We propose that Tat-induced oxidative stress, DNA damage and chromosomal aberrations are novel oncogenic factors favoring B-cell lymphomas in HIV-1 infected individuals. B-cells of HIV-infected individuals exhibit elevated levels of oxidative stress, DNA damage and chromosomal aberrations. Purified HIV-1 Tat protein reproduces this effect and induces oxidative stress and DNA damage in B-cells. HIV-1 Tat induces mitochondrial oxidative stress and activates NF-kB in B-cells. This condition increases the risk of developing chromosomal abnormalities and translocations.
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Affiliation(s)
- Rawan El-Amine
- UMR 8126, Paris Saclay University, Paris-Sud University, Institut Gustave Roussy, CNRS, Villejuif 94805, France; LIA 1066 LFR2O French-Russian Joint Cancer Research Laboratory, 94805 Villejuif, France, 119334 Moscow, Russia; Doctoral school of Sciences and Technology (EDST), Lebanese University, Hadath, Lebanon; Department of Life and Earth Sciences, Faculty of Sciences II/Doctoral School of Sciences and Technology (EDST), Lebanese University, Jdeidet El Metn-Fanar, Lebanon; Department of Chemistry and Biochemistry, Faculty of Sciences II/EDST, Lebanese University, Jdeidet El Metn-Fanar, Lebanon
| | - Diego Germini
- UMR 8126, Paris Saclay University, Paris-Sud University, Institut Gustave Roussy, CNRS, Villejuif 94805, France; LIA 1066 LFR2O French-Russian Joint Cancer Research Laboratory, 94805 Villejuif, France, 119334 Moscow, Russia
| | - Vlada V Zakharova
- UMR 8126, Paris Saclay University, Paris-Sud University, Institut Gustave Roussy, CNRS, Villejuif 94805, France; LIA 1066 LFR2O French-Russian Joint Cancer Research Laboratory, 94805 Villejuif, France, 119334 Moscow, Russia; A.N. Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - Tatyana Tsfasman
- UMR 8126, Paris Saclay University, Paris-Sud University, Institut Gustave Roussy, CNRS, Villejuif 94805, France; LIA 1066 LFR2O French-Russian Joint Cancer Research Laboratory, 94805 Villejuif, France, 119334 Moscow, Russia
| | - Eugene V Sheval
- LIA 1066 LFR2O French-Russian Joint Cancer Research Laboratory, 94805 Villejuif, France, 119334 Moscow, Russia; A.N. Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - Ruy A N Louzada
- UMR 8200, Institut Gustave Roussy, CNRS, Villejuif 94805, France
| | - Corinne Dupuy
- UMR 8200, Institut Gustave Roussy, CNRS, Villejuif 94805, France
| | - Chrystèle Bilhou-Nabera
- Biological Hematology Service-U.F. of Onco-Hematology Cytogenetics-Hôpital Saint-Antoine, 75012 Paris, France
| | - Aline Hamade
- Department of Life and Earth Sciences, Faculty of Sciences II/Doctoral School of Sciences and Technology (EDST), Lebanese University, Jdeidet El Metn-Fanar, Lebanon
| | - Fadia Najjar
- Department of Chemistry and Biochemistry, Faculty of Sciences II/EDST, Lebanese University, Jdeidet El Metn-Fanar, Lebanon
| | - Eric Oksenhendler
- Department of Clinical Immunology, Hôpital Saint-Louis, 75010 Paris, France
| | - Marс Lipinski
- UMR 8126, Paris Saclay University, Paris-Sud University, Institut Gustave Roussy, CNRS, Villejuif 94805, France; LIA 1066 LFR2O French-Russian Joint Cancer Research Laboratory, 94805 Villejuif, France, 119334 Moscow, Russia
| | - Boris V Chernyak
- LIA 1066 LFR2O French-Russian Joint Cancer Research Laboratory, 94805 Villejuif, France, 119334 Moscow, Russia; A.N. Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - Yegor S Vassetzky
- UMR 8126, Paris Saclay University, Paris-Sud University, Institut Gustave Roussy, CNRS, Villejuif 94805, France; LIA 1066 LFR2O French-Russian Joint Cancer Research Laboratory, 94805 Villejuif, France, 119334 Moscow, Russia; A.N. Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia.
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Eryilmaz OG, Kansu-Celik H, Erel O, Erdogan S. Thiol/disulfide parameters as a novel oxidative marker in medical labor induction with oxytocin. Horm Mol Biol Clin Investig 2017; 29:61-65. [PMID: 27505093 DOI: 10.1515/hmbci-2016-0032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 07/13/2016] [Indexed: 11/15/2022]
Abstract
BACKGROUND The aim of this study was to analyze the alterations in thiol levels among mothers and neonates who were prone to medical oxytocin induction. MATERIALS AND METHODS A total of 40 pregnant women who underwent medical labor induction with oxytocin (Group A) were compared with 53 women whose labor progressed spontaneously without any kind of induction (Group B). We measured the thiol/disulfide homeostasis parameters (native thiol, total thiol, disulfide, disulfide/total thiol, disulfide/native thiol) of maternal and cord blood. RESULTS There were no statistically significant differences with respect to the maternal and cord blood thiol/disulfide homeostasis between the two groups. CONCLUSION Being an artificial intervention during labor, oxytocin induction has been found to be safe in terms of oxidative stress (OS) according to the results of this study. Both the maternal and the fetal sides were safe in this molecular manner against oxytocin infusion.
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Abstract
The purpose of the study reported in this Research Communication was to evaluate alterations in concentration of total antioxidant capacity (TAC) of plasma, plasma total thiols as markers of oxidative protein damage and malondialdehyde (as a final product of lipid peroxidation) in samples obtained at different stages of the lactation cycle and dry period of dairy cows. We found that TAC was significantly lower in the primiparous cows compared to multiparous cows. This study clearly demonstrates a need for monitoring primiparous cows during the production cycle, especially when they are faced with severe metabolic conditions. Furthermore, TAC may be a sensitive, reliable and useful indicator for measurement of cumulative effects of antioxidants as an addition to metabolic profile tests, which are currently used to analyse dairy cattle health.
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Bocci V, Pogni R, Corradeschi F, Busi E, Cervelli C, Bocchi L, Basosi R. Oxygen-ozone in Orthopaedics: EPR Detection of Hydroxyl Free Radicals in Ozone-Treated “Nucleus Pulposus” Material. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/197140090101400106] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The direct and indirect application of oxygen-ozone in several orthopaedic affections was briefly reviewed, trying to understand possible mechanisms of action explaining the surprisingly good results and no toxicity. Moreover, by using EPR spin trapping technique with DEPMPO the generation of free radicals by treating human “nucleus pulposus” material with oxygen-ozone (O2-O3) was investigated. The DEPMPO spin adduct of hydroxyl radical (DEPMPO-OH) was detected. The presence of ·OH even at a very low ozone concentration (5 μg/mL) may explain why this material undergoes to a progressive breakdown with re-absorption and consequent disappearance of a hernial disk. Thus the intradiscal insufflation of a minute volume of O2-O3 may represent a new efficient, inexpensive and atoxic chemionucleolytic approach.
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Affiliation(s)
| | - R. Pogni
- Department of Chemistry; University of Siena
| | | | - E. Busi
- Department of Chemistry; University of Siena
| | - C. Cervelli
- Institute of Orthopedics; University of Siena
| | - L. Bocchi
- Institute of Orthopedics; University of Siena
| | - R. Basosi
- Department of Chemistry; University of Siena
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Use of spin traps to detect superoxide production in living cells by electron paramagnetic resonance (EPR) spectroscopy. Methods 2016; 109:31-43. [DOI: 10.1016/j.ymeth.2016.05.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 05/04/2016] [Accepted: 05/05/2016] [Indexed: 01/23/2023] Open
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Spectrophotometric Determination of Phenolic Antioxidants in the Presence of Thiols and Proteins. Int J Mol Sci 2016; 17:ijms17081325. [PMID: 27529232 PMCID: PMC5000722 DOI: 10.3390/ijms17081325] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 08/04/2016] [Accepted: 08/05/2016] [Indexed: 12/12/2022] Open
Abstract
Development of easy, practical, and low-cost spectrophotometric methods is required for the selective determination of phenolic antioxidants in the presence of other similar substances. As electron transfer (ET)-based total antioxidant capacity (TAC) assays generally measure the reducing ability of antioxidant compounds, thiols and phenols cannot be differentiated since they are both responsive to the probe reagent. In this study, three of the most common TAC determination methods, namely cupric ion reducing antioxidant capacity (CUPRAC), 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt/trolox equivalent antioxidant capacity (ABTS/TEAC), and ferric reducing antioxidant power (FRAP), were tested for the assay of phenolics in the presence of selected thiol and protein compounds. Although the FRAP method is almost non-responsive to thiol compounds individually, surprising overoxidations with large positive deviations from additivity were observed when using this method for (phenols + thiols) mixtures. Among the tested TAC methods, CUPRAC gave the most additive results for all studied (phenol + thiol) and (phenol + protein) mixtures with minimal relative error. As ABTS/TEAC and FRAP methods gave small and large deviations, respectively, from additivity of absorbances arising from these components in mixtures, mercury(II) compounds were added to stabilize the thiol components in the form of Hg(II)-thiol complexes so as to enable selective spectrophotometric determination of phenolic components. This error compensation was most efficient for the FRAP method in testing (thiols + phenols) mixtures.
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Niemuth NJ, Thompson AF, Crowe ME, Lieven CJ, Levin LA. Intracellular disulfide reduction by phosphine-borane complexes: Mechanism of action for neuroprotection. Neurochem Int 2016; 99:24-32. [PMID: 27264910 DOI: 10.1016/j.neuint.2016.05.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 05/23/2016] [Accepted: 05/31/2016] [Indexed: 01/02/2023]
Abstract
Phosphine-borane complexes are novel cell-permeable drugs that protect neurons from axonal injury in vitro and in vivo. These drugs activate the extracellular signal-regulated kinases 1/2 (ERK1/2) cell survival pathway and are therefore neuroprotective, but do not scavenge superoxide. In order to understand the interaction between superoxide signaling of neuronal death and the action of phosphine-borane complexes, their biochemical activity in cell-free and in vitro assays was studied by electron paramagnetic resonance (EPR) spectrometry and using an intracellular dithiol reporter that becomes fluorescent when its disulfide bond is cleaved. These studies demonstrated that bis(3-propionic acid methyl ester) phenylphosphine-borane complex (PB1) and (3-propionic acid methyl ester) diphenylphosphine-borane complex (PB2) are potent intracellular disulfide reducing agents which are cell permeable. EPR and pharmacological studies demonstrated reducing activity but not scavenging of superoxide. Given that phosphine-borane complexes reduce cell injury from mitochondrial superoxide generation but do not scavenge superoxide, this implies a mechanism where an intracellular superoxide burst induces downstream formation of protein disulfides. The redox-dependent cleavage of the disulfides is therefore a novel mechanism of neuroprotection.
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Affiliation(s)
- Nicholas J Niemuth
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, United States
| | - Alex F Thompson
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, United States
| | - Megan E Crowe
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, United States
| | - Christopher J Lieven
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, United States
| | - Leonard A Levin
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, United States; Departments of Ophthalmology and Neurology, McGill University, Canada
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Dirican N, Dirican A, Sen O, Aynali A, Atalay S, Bircan HA, Oztürk O, Erdogan S, Cakir M, Akkaya A. Thiol/disulfide homeostasis: A prognostic biomarker for patients with advanced non-small cell lung cancer? Redox Rep 2016. [PMID: 26200761 DOI: 10.1179/1351000215y.0000000027] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND The aim of this study was to investigate oxidative stress and thiol/disulfide status with a novel automated homeostasis assay in advanced non-small cell lung cancer (NSCLC). METHODS Thirty-five patients with advanced NSCLC, who had been newly diagnosed and previously untreated, and 35 healthy subjects were chosen for the study. We measured plasma total thiol (-SH+-S-S-), native thiol (thiol) (-SH), and disulfide (-S-S-) levels in the patients with NSCLC and the healthy subjects. The thiol/disulfide (-SH/-S-S-) ratio was also calculated. RESULTS Statistically significant differences between the patient group and the control group were detected for the thiol/disulfide parameters. The mean native thiol, total thiol, and disulfide levels were significantly lower in the group with advanced stage NSCLC. The cut-off value was 313 and 13.8 for native thiol and disulfide, respectively. Median overall survival (OS) was significantly shorter in patients with low native thiol and disulfide levels according to the cut-off value (respectively, P = 0.001; P = 0.006). Native thiol, total thiol, and disulfide levels were correlated with Karnofsky performance status (KPS), OS, and age. Additionally, hierarchical regression analyses showed gender, KPS, lung metastases, and plasma native thiol levels were the determinants of OS in the final model. CONCLUSION These results suggest that in advanced stage NSCLC, the native thiol, total thiol, and disulfide levels decrease, while the native thiol/disulfide ratio does not change. Low levels of thiol/disulfide parameters are related to tumor aggressiveness and may predict a poor outcome for patients with NSCLC.
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Affiliation(s)
- Nigar Dirican
- a Department of Chest Diseases, Medical Faculty , Suleyman Demirel University , Isparta , Turkey
| | - Ahmet Dirican
- b Department of Medical Oncology , State Hospital , Isparta , Turkey
| | - Orhan Sen
- c Department of Biochemistry , Ankara Ataturk Training and Research Hospital , Turkey
| | - Ayse Aynali
- d Department of Clinical Microbiology , Suleyman Demirel University , Isparta , Turkey
| | - Sule Atalay
- a Department of Chest Diseases, Medical Faculty , Suleyman Demirel University , Isparta , Turkey
| | - Haci Ahmet Bircan
- a Department of Chest Diseases, Medical Faculty , Suleyman Demirel University , Isparta , Turkey
| | - Onder Oztürk
- a Department of Chest Diseases, Medical Faculty , Suleyman Demirel University , Isparta , Turkey
| | - Serpil Erdogan
- e Department of Biochemistry , Ankara Numune Training and Research Hospital , Turkey
| | - Munire Cakir
- a Department of Chest Diseases, Medical Faculty , Suleyman Demirel University , Isparta , Turkey
| | - Ahmet Akkaya
- a Department of Chest Diseases, Medical Faculty , Suleyman Demirel University , Isparta , Turkey
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Apak R, Özyürek M, Güçlü K, Çapanoğlu E. Antioxidant Activity/Capacity Measurement. 1. Classification, Physicochemical Principles, Mechanisms, and Electron Transfer (ET)-Based Assays. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:997-1027. [PMID: 26728425 DOI: 10.1021/acs.jafc.5b04739] [Citation(s) in RCA: 363] [Impact Index Per Article: 45.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Because there is no widely adopted "total antioxidant parameter" as a nutritional index for labeling food and biological fluids, it is desirable to establish and standardize methods that can measure the total antioxidant capacity (TAC) level directly from plant-based food extracts and biological fluids. In this review, we (i) present and classify the widely used analytical approaches (e.g., in vitro and in vivo, enzymatic and nonenzymatic, electron transfer (ET)- and hydrogen atom transfer (HAT)-based, direct and indirect assays) for evaluating antioxidant capacity/activity; (ii) discuss total antioxidant capacity/activity assays in terms of chemical kinetics and thermodynamics, reaction mechanisms, and analytical performance characteristics, together with advantages and drawbacks; and (iii) critically evaluate ET-based methods for analytical, food chemical, biomedical/clinical, and environmental scientific communities so that they can effectively use these assays in the correct places to meet their needs.
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Affiliation(s)
- Reşat Apak
- Department of Chemistry, Faculty of Engineering, Istanbul University , Avcilar, 34320 Istanbul, Turkey
| | - Mustafa Özyürek
- Department of Chemistry, Faculty of Engineering, Istanbul University , Avcilar, 34320 Istanbul, Turkey
| | - Kubilay Güçlü
- Department of Chemistry, Faculty of Engineering, Istanbul University , Avcilar, 34320 Istanbul, Turkey
| | - Esra Çapanoğlu
- Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University , Maslak, 34469 Istanbul, Turkey
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BEKDESER B, ÖZYÜREK M, AKYÜZ E, APAK R. A Novel Spectrofluorometric Probe for the Determination of Peroxynitrite Anion Scavenging Activity of Biothiols and Amino Acids. ANAL SCI 2016; 32:1315-1320. [DOI: 10.2116/analsci.32.1315] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Burcu BEKDESER
- Department of Chemistry, Faculty of Engineering, Istanbul University
- Istanbul University-Application & Research Center for the Measurement of Food Antioxidants, Istanbul University
| | - Mustafa ÖZYÜREK
- Department of Chemistry, Faculty of Engineering, Istanbul University
| | - Esin AKYÜZ
- Department of Chemistry, Faculty of Engineering, Istanbul University
| | - Resat APAK
- Department of Chemistry, Faculty of Engineering, Istanbul University
- Istanbul University-Application & Research Center for the Measurement of Food Antioxidants, Istanbul University
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30
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Longstaff C, Hogwood J, Gray E, Komorowicz E, Varjú I, Varga Z, Kolev K. Neutralisation of the anti-coagulant effects of heparin by histones in blood plasma and purified systems. Thromb Haemost 2015; 115:591-9. [PMID: 26632486 DOI: 10.1160/th15-03-0214] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 10/22/2015] [Indexed: 12/14/2022]
Abstract
Neutrophil extracellular traps (NETs) composed primarily of DNA and histones are a link between infection, inflammation and coagulation. NETs promote coagulation and approaches to destabilise NETs have been explored to reduce thrombosis and treat sepsis. Heparinoids bind histones and we report quantitative studies in plasma and purified systems to better understand physiological consequences. Unfractionated heparin (UFH) was investigated by activated partial thromboplastin time (APTT) and alongside low-molecular-weight heparins (LMWH) in purified systems with thrombin or factor Xa (FXa) and antithrombin (AT) to measure the sensitivity of UFH or LMWH to histones. A method was developed to assess the effectiveness of DNA and non-anticoagulant heparinoids as anti-histones. Histones effectively neutralised UFH, the IC50 value for neutralisation of 0.2 IU/ml UFH was 1.8 µg/ml histones in APTT and 4.6 µg/ml against 0.6 IU/ml UFH in a purified system. Histones also inhibited the activities of LMWHs with thrombin (IC50 6.1 and 11.0 µg/ml histones, for different LMWHs) or FXa (IC50 7.8 and 7.0 µg/ml histones). Direct interactions of UFH and LMWH with DNA and histones were explored by surface plasmon resonance, while rheology studies showed complex effects of histones, UFH and LMWH on clot resilience. A conclusion from these studies is that anticoagulation by UFH and LMWH will be compromised by high affinity binding to circulating histones even in the presence of DNA. A complete understanding of the effects of histones, DNA and heparins on the haemostatic system must include an appreciation of direct effects on fibrin and clot structure.
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Affiliation(s)
- Colin Longstaff
- Colin Longstaff, Biotherapeutics Group, National Institute for Biological Standards and Control, S Mimms, Herts, EN6 3QG, UK, Tel.: +44 1707 641253, Fax: +44 1707 641050, E-Mail:
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31
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Abstract
Thiyl radicals are important intermediates in the redox biology and chemistry of thiols. These radicals can react via hydrogen transfer with various C-H bonds in peptides and proteins, leading to the generation of carbon-centered radicals, and, potentially, to irreversible protein damage. This review summarizes quantitative information on reaction kinetics and product formation, and discusses the significance of these reactions for protein degradation induced by thiyl radical formation.
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Affiliation(s)
- Christian Schöneich
- a Department of Pharmaceutical Chemistry , The University of Kansas , Lawrence , KS 66047 , USA
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32
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Nauser T, Koppenol WH, Schöneich C. Protein thiyl radical reactions and product formation: a kinetic simulation. Free Radic Biol Med 2015; 80:158-63. [PMID: 25499854 PMCID: PMC5118936 DOI: 10.1016/j.freeradbiomed.2014.12.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 11/26/2014] [Accepted: 12/01/2014] [Indexed: 11/30/2022]
Abstract
Protein thiyl radicals are important intermediates generated in redox processes of thiols and disulfides. Thiyl radicals efficiently react with glutathione and ascorbate, and the common notion is that these reactions serve to eliminate thiyl radicals before they can enter potentially hazardous processes. However, over the past years increasing evidence has been provided for rather efficient intramolecular hydrogen transfer processes of thiyl radicals in proteins and peptides. Based on rate constants published for these processes, we have performed kinetic simulations of protein thiyl radical reactivity. Our simulations suggest that protein thiyl radicals enter intramolecular hydrogen transfer reactions to a significant extent even under physiologic conditions, i.e., in the presence of 30 µM oxygen, 1 mM ascorbate, and 10 mM glutathione. At lower concentrations of ascorbate and glutathione, frequently observed when tissue is exposed to oxidative stress, the extent of irreversible protein thiyl radical-dependent protein modification increases.
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Affiliation(s)
- Thomas Nauser
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland.
| | - Willem H Koppenol
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Christian Schöneich
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, KS 66047, USA.
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Zimmerman MT, Bayse CA, Ramoutar RR, Brumaghim JL. Sulfur and selenium antioxidants: challenging radical scavenging mechanisms and developing structure-activity relationships based on metal binding. J Inorg Biochem 2014; 145:30-40. [PMID: 25600984 DOI: 10.1016/j.jinorgbio.2014.12.020] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 12/17/2014] [Accepted: 12/19/2014] [Indexed: 11/30/2022]
Abstract
Because sulfur and selenium antioxidants can prevent oxidative damage, numerous animal and clinical trials have investigated the ability of these compounds to prevent the oxidative stress that is an underlying cause of cardiovascular disease, Alzheimer's disease, and cancer, among others. One of the most common sources of oxidative damage is metal-generated hydroxyl radical; however, very little research has focused on determining the metal-binding abilities and structural attributes that affect oxidative damage prevention by sulfur and selenium compounds. In this review, we describe our ongoing investigations into sulfur and selenium antioxidant prevention of iron- and copper-mediated oxidative DNA damage. We determined that many sulfur and selenium compounds inhibit Cu(I)-mediated DNA damage and that DNA damage prevention varies dramatically when Fe(II) is used in place of Cu(I) to generate hydroxyl radical. Oxidation potentials of the sulfur or selenium compounds do not correlate with their ability to prevent DNA damage, highlighting the importance of metal coordination rather than reactive oxygen species scavenging as an antioxidant mechanism. Additional gel electrophoresis, mass spectrometry, and UV-visible studies confirmed sulfur and selenium antioxidant binding to Cu(I) and Fe(II). Ultimately, our studies established that both the hydroxyl-radical-generating metal ion and the chemical environment of the sulfur or selenium significantly affect DNA damage prevention and that metal coordination is an essential mechanism for these antioxidants.
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Affiliation(s)
| | - Craig A Bayse
- Department of Chemistry and Biochemistry, Old Dominion University, Hampton Boulevard, Norfolk, VA 23529, USA
| | - Ria R Ramoutar
- Department of Chemistry, Clemson University, Clemson, SC 29634-0973, USA
| | - Julia L Brumaghim
- Department of Chemistry, Clemson University, Clemson, SC 29634-0973, USA.
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Schöneich C, Mozziconacci O, Koppenol WH, Nauser T. Intramolecular 1,2- and 1,3-Hydrogen Transfer Reactions of Thiyl Radicals. Isr J Chem 2014. [DOI: 10.1002/ijch.201300107] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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35
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Mishra KK, Dwivedi U, Pal M, Sharma R, Chaturvedi R. Synergetic Effect of Thiolacids on the Oxidation of Thiourea by Methylene Blue in Acidic Medium. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES INDIA SECTION A-PHYSICAL SCIENCES 2014. [DOI: 10.1007/s40010-013-0109-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Carballal S, Bartesaghi S, Radi R. Kinetic and mechanistic considerations to assess the biological fate of peroxynitrite. Biochim Biophys Acta Gen Subj 2013; 1840:768-80. [PMID: 23872352 DOI: 10.1016/j.bbagen.2013.07.005] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 06/25/2013] [Accepted: 07/04/2013] [Indexed: 01/21/2023]
Abstract
BACKGROUND Peroxynitrite, the product of the reaction between superoxide radicals and nitric oxide, is an elusive oxidant with a short half-life and a low steady-state concentration in biological systems; it promotes nitroxidative damage. SCOPE OF REVIEW We will consider kinetic and mechanistic aspects that allow rationalizing the biological fate of peroxynitrite from data obtained by a combination of methods that include fast kinetic techniques, electron paramagnetic resonance and kinetic simulations. In addition, we provide a quantitative analysis of peroxynitrite production rates and conceivable steady-state levels in living systems. MAJOR CONCLUSIONS The preferential reactions of peroxynitrite in vivo include those with carbon dioxide, thiols and metalloproteins; its homolysis represents only <1% of its fate. To note, carbon dioxide accounts for a significant fraction of peroxynitrite consumption leading to the formation of strong one-electron oxidants, carbonate radicals and nitrogen dioxide. On the other hand, peroxynitrite is rapidly reduced by peroxiredoxins, which represent efficient thiol-based peroxynitrite detoxification systems. Glutathione, present at mM concentration in cells and frequently considered a direct scavenger of peroxynitrite, does not react sufficiently fast with it in vivo; glutathione mainly inhibits peroxynitrite-dependent processes by reactions with secondary radicals. The detection of protein 3-nitrotyrosine, a molecular footprint, can demonstrate peroxynitrite formation in vivo. Basal peroxynitrite formation rates in cells can be estimated in the order of 0.1 to 0.5μMs(-1) and its steady-state concentration at ~1nM. GENERAL SIGNIFICANCE The analysis provides a handle to predict the preferential fate and steady-state levels of peroxynitrite in living systems. This is useful to understand pathophysiological aspects and pharmacological prospects connected to peroxynitrite. This article is part of a Special Issue entitled Current methods to study reactive oxygen species - pros and cons and biophysics of membrane proteins. Guest Editor: Christine Winterbourn.
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Affiliation(s)
- Sebastián Carballal
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay; Center for Free Radical and Biomedical Research, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
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Myers JM, Cheng Q, Antholine WE, Kalyanaraman B, Filipovska A, Arnér ESJ, Myers CR. Redox activation of Fe(III)-thiosemicarbazones and Fe(III)-bleomycin by thioredoxin reductase: specificity of enzymatic redox centers and analysis of reactive species formation by ESR spin trapping. Free Radic Biol Med 2013; 60:183-94. [PMID: 23485585 PMCID: PMC3654041 DOI: 10.1016/j.freeradbiomed.2013.02.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 01/30/2013] [Accepted: 02/15/2013] [Indexed: 02/07/2023]
Abstract
Thiosemicarbazones such as Triapine (Tp) and Dp44mT are tridentate iron (Fe) chelators that have well-documented antineoplastic activity. Although Fe-thiosemicarbazones can undergo redox cycling to generate reactive species that may have important roles in their cytotoxicity, there is only limited insight into specific cellular agents that can rapidly reduce Fe(III)-thiosemicarbazones and thereby promote their redox activity. Here we report that thioredoxin reductase-1 (TrxR1) and glutathione reductase (GR) have this activity and that there is considerable specificity to the interactions between specific redox centers in these enzymes and various Fe(III) complexes. Site-directed variants of TrxR1 demonstrate that the selenocysteine (Sec) of the enzyme is not required, whereas the C59 residue and the flavin have important roles. Although TrxR1 and GR have analogous C59/flavin motifs, TrxR is considerably faster than GR. For both enzymes, Fe(III)(Tp)2 is reduced faster than Fe(III)(Dp44mT)2. This reduction promotes redox cycling and the generation of hydroxyl radical (HO) in a peroxide-dependent manner, even with low-micromolar levels of Fe(Tp)2. TrxR also reduces Fe(III)-bleomycin and this activity is Sec-dependent. TrxR cannot reduce Fe(III)-EDTA at significant rates. Our findings are the first to demonstrate pro-oxidant reductive activation of Fe(III)-based antitumor thiosemicarbazones by interactions with specific enzyme species. The marked elevation of TrxR1 in many tumors could contribute to the selective tumor toxicity of these drugs by enhancing the redox activation of Fe(III)-thiosemicarbazones and the generation of reactive oxygen species such as HO.
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Affiliation(s)
- Judith M Myers
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
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Osburn S, Berden G, Oomens J, Gulyuz K, Polfer NC, O'Hair RAJ, Ryzhov V. Structure and Reactivity of the Glutathione Radical Cation: Radical Rearrangement from the Cysteine Sulfur to the Glutamic Acid α-Carbon Atom. Chempluschem 2013; 78:970-978. [DOI: 10.1002/cplu.201300057] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Indexed: 12/19/2022]
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Aboltin PV, Shevchenko TF, Shumaev KB, Kalamkarov GR. Photoinduced production of reactive oxygen species by retinal derivatives and conjugates. Biophysics (Nagoya-shi) 2013. [DOI: 10.1134/s0006350913020024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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40
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Zanini D, Schmatz R, Pelinson LP, Pimentel VC, da Costa P, Cardoso AM, Martins CC, Schetinger CC, Baldissareli J, do Carmo Araújo M, Oliveira L, Chiesa J, Morsch VM, Leal DBR, Schetinger MRC. Ectoenzymes and cholinesterase activity and biomarkers of oxidative stress in patients with lung cancer. Mol Cell Biochem 2012. [PMID: 23180243 DOI: 10.1007/s11010-012-1513-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We aimed to examine the nucleoside triphosphate diphosphohydrolases (NTPDase) in lymphocytes; adenosine deaminase (ADA) and butyrylcholinesterase (BChE) in serum; and acetylcholinesterase (AChE), superoxide dismutase (SOD), and catalase (CAT) activity in whole blood; since these enzymes are involved in inflammation responses as well as in oxidative stress conditions. We also checked the levels of total thiols (T-SH), non-protein thiols (NPSH), and thiobarbituric acid reactive substances (TBARS) in serum of patients with lung cancer. We collected blood samples from patients (n = 31) previously treated for lung cancer with chemotherapy. Patients were classified as stage IIIb and IV according to the Union for International Cancer Control (UICC). The results showed a significant increase in the hydrolysis of ATP, ADP, and adenosine in patients when compared with the control group. The activity of AChE, SOD, and CAT as well as the T-SH and NPSH levels were higher in patients group and TBARS levels were lower in patients compared with the control group. These findings demonstrated that the enzymes activity involved in the control of inflammatory and immune processes as well as the oxidative stress parameters are altered in patients with lung cancer.
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Affiliation(s)
- Daniela Zanini
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Departamento de Química, Universidade Federal de Santa Maria, Campus Universitário, Camobi, Santa Maria, RS, 97105-900, Brazil.
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41
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Sidhu PS, Mosier PD, Zhou Q, Desai UR. On scaffold hopping: challenges in the discovery of sulfated small molecules as mimetics of glycosaminoglycans. Bioorg Med Chem Lett 2012; 23:355-9. [PMID: 23164711 DOI: 10.1016/j.bmcl.2012.10.079] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2012] [Revised: 10/04/2012] [Accepted: 10/15/2012] [Indexed: 01/25/2023]
Abstract
The design of sulfated, small, nonsaccharide molecules as modulators of proteins is still in its infancy as standard drug discovery tools such as library of diverse sulfated molecules and in silico docking and scoring protocol have not been firmly established. Databases, such as ZINC, contain too few sulfate-containing nonsaccharide molecules, which severely limits the identification of new hits. Lack of a generally applicable protocol for scaffold hopping limits the development of sulfated small molecules as synthetic mimetics of the highly sulfated glycosaminoglycans. We explored a sequential ligand-based (LBVS) and structure-based virtual screening (SBVS) approach starting from our initial discovery of monosulfated benzofurans to discover alternative scaffolds as allosteric modulators of thrombin, a key coagulation enzyme. Screening the ZINC database containing nearly 1 million nonsulfated small molecules using a pharmacophore developed from the parent sulfated benzofurans followed by a genetic algorithm-based dual-filter docking and scoring screening identified a group of 10 promising hits, of which three top-scoring hits were synthesized. Each was found to selectively inhibit human alpha-thrombin suggesting the possibility of this approach for scaffold hopping. Michaelis-Menten kinetics showed allosteric inhibition mechanism for the best molecule and human plasma studies confirmed good anticoagulation potential as expected. Our simple sequential LBVS and SBVS approach is likely to be useful as a general strategy for identification of sulfated small molecules hits as modulators of glycosaminoglycan-protein interactions.
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Affiliation(s)
- Preetpal S Sidhu
- Department of Medicinal Chemistry and Institute for Structural Biology and Drug Discovery, Virginia Commonwealth University, Richmond, VA 23219, United States
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42
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Mozziconacci O, Williams TD, Schöneich C. Intramolecular hydrogen transfer reactions of thiyl radicals from glutathione: formation of carbon-centered radical at Glu, Cys, and Gly. Chem Res Toxicol 2012; 25:1842-61. [PMID: 22712461 DOI: 10.1021/tx3000494] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Glutathione thiyl radicals (GS(•)) were generated in H(2)O and D(2)O by either exposure of GSH to AAPH, photoirradiation of GSH in the presence of acetone, or photoirradiation of GSSG. Detailed interpretation of the fragmentation pathways of deuterated GSH and GSH derivatives during mass spectrometry analysis allowed us to demonstrate that reversible intramolecular H-atom transfer reactions between GS(•) and C-H bonds at Cys[(α)C], Cys[(β)C], and Gly[(α)C] are possible.
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Affiliation(s)
- Olivier Mozziconacci
- Department of Pharmaceutical Chemistry, University of Kansas, 2095 Constant Avenue, Lawrence, KA 66047, USA
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43
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Nauser T, Koppenol WH, Schöneich C. Reversible hydrogen transfer reactions in thiyl radicals from cysteine and related molecules: absolute kinetics and equilibrium constants determined by pulse radiolysis. J Phys Chem B 2012; 116:5329-41. [PMID: 22483034 PMCID: PMC3736814 DOI: 10.1021/jp210954v] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The mercapto group of cysteine (Cys) is a predominant target for oxidative modification, where one-electron oxidation leads to the formation of Cys thiyl radicals, CysS(•). These Cys thiyl radicals enter 1,2- and 1,3-hydrogen transfer reactions, for which rate constants are reported in this paper. The products of these 1,2- and 1,3-hydrogen transfer reactions are carbon-centered radicals at position C(3) (α-mercaptoalkyl radicals) and C(2) ((•)C(α) radicals) of Cys, respectively. Both processes can be monitored separately in Cys analogues such as cysteamine (CyaSH) and penicillamine (PenSH). At acidic pH, thiyl radicals from CyaSH permit only the 1,2-hydrogen transfer according to equilibrium 12, (+)H(3)NCH(2)CH(2)S(• )⇌ (+)H(3)NCH(2)(•)CH-SH, where rate constants for forward and reverse reaction are k(12) ≈ 10(5) s(-1) and k(-12) ≈ 1.5 × 10(5)s(-1), respectively. In contrast, only the 1,3-hydrogen transfer is possible for thiyl radicals from PenSH according to equilibrium 14, ((+)H(3)N/CO(2)H)C(α)-C(CH(3))(2)-S(•) ⇌ ((+)H(3)N/CO(2)H)(•)C(α)-C(CH(3))(2)-SH, where rate constants for the forward and the reverse reaction are k(14) = 8 × 10(4) s(-1) and k(-14) = 1.4 × 10(6) s(-1). The (•)C(α) radicals from PenSH and Cys have the additional opportunity for β-elimination of HS(•)/S(•-), which proceeds with k(39) ≈ (3 ± 1) × 10(4) s(-1) from (•)C(α) radicals from PenSH and k(-34) ≈ 5 × 10(3) s(-1) from (•)C(α) radicals from Cys. The rate constants quantified for the 1,2- and 1,3-hydrogen transfer reactions can be used as a basis to calculate similar processes for Cys thiyl radicals in proteins, where hydrogen transfer reactions, followed by the addition of oxygen, may lead to the irreversible modification of target proteins.
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Affiliation(s)
- Thomas Nauser
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland
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Murphy MP. Mitochondrial thiols in antioxidant protection and redox signaling: distinct roles for glutathionylation and other thiol modifications. Antioxid Redox Signal 2012; 16:476-95. [PMID: 21954972 DOI: 10.1089/ars.2011.4289] [Citation(s) in RCA: 251] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
SIGNIFICANCE The mitochondrial matrix contains much of the machinery at the heart of metabolism. This compartment is also exposed to a high and continual flux of superoxide, hydrogen peroxide, and related reactive species. To protect mitochondria from these sources of oxidative damage, there is an integrated set of thiol systems within the matrix comprising the thioredoxin/peroxiredoxin/methionine sulfoxide reductase pathways and the glutathione/glutathione peroxidase/glutathione-S-transferase/glutaredoxin pathways that in conjunction with protein thiols prevent much of this oxidative damage. In addition, the changes in the redox state of many components of these mitochondrial thiol systems may transduce and relay redox signals within and through the mitochondrial matrix to modulate the activity of biochemical processes. RECENT ADVANCES Here, mitochondrial thiol systems are reviewed, and areas of uncertainty are pointed out, focusing on recent developments in our understanding of their roles. CRITICAL ISSUES The areas of particular focus are on the multiple, overlapping roles of mitochondrial thiols and on understanding how these thiols contribute to both antioxidant defenses and redox signaling. FUTURE DIRECTIONS Recent technical progress in the identification and quantification of thiol modifications by redox proteomics means that many of the questions raised about the multiple roles of mitochondrial thiols can now be addressed.
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Zaffagnini M, Bedhomme M, Marchand CH, Morisse S, Trost P, Lemaire SD. Redox regulation in photosynthetic organisms: focus on glutathionylation. Antioxid Redox Signal 2012; 16:567-86. [PMID: 22053845 DOI: 10.1089/ars.2011.4255] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
SIGNIFICANCE In photosynthetic organisms, besides the well-established disulfide/dithiol exchange reactions specifically controlled by thioredoxins (TRXs), protein S-glutathionylation is emerging as an alternative redox modification occurring under stress conditions. This modification, consisting of the formation of a mixed disulfide between glutathione and a protein cysteine residue, can not only protect specific cysteines from irreversible oxidation but also modulate protein activities and appears to be specifically controlled by small disulfide oxidoreductases of the TRX superfamily named glutaredoxins (GRXs). RECENT STUDIES In recent times, several studies allowed significant progress in this area, mostly due to the identification of several plant proteins undergoing S-glutathionylation and to the characterization of the molecular mechanisms and the proteins involved in the control of this modification. CRITICAL ISSUES This article provides a global overview of protein glutathionylation in photosynthetic organisms with particular emphasis on the mechanisms of protein glutathionylation and deglutathionylation and a focus on the role of GRXs. Then, we describe the methods employed for identification of glutathionylated proteins in photosynthetic organisms and review the targets and the possible physiological functions of protein glutathionylation. FUTURE DIRECTIONS In order to establish the importance of protein S-glutathionylation in photosynthetic organisms, future studies should be aimed at delineating more accurately the molecular mechanisms of glutathionylation and deglutathionylation reactions, at identifying proteins undergoing S-glutathionylation in vivo under diverse conditions, and at investigating the importance of redoxins, GRX, and TRX, in the control of this redox modification in vivo.
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Affiliation(s)
- Mirko Zaffagnini
- Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, Centre National de la Recherche Scientifique, Université Pierre et Marie Curie, Institut de Biologie Physico-Chimique, Paris, France
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46
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Takahama U, Hirota S. Effects of the food additive sulfite on nitrite-dependent nitric oxide production under conditions simulating the mixture of saliva and gastric juice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:1102-1112. [PMID: 22224438 DOI: 10.1021/jf2049257] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The food additive sulfite is mixed with saliva, which contains nitrite, in the oral cavity, and the mixture is mixed with gastric juice in the stomach. In the stomach, salivary nitrite can be transformed to nitric oxide (NO). In this study, the effects of sulfite on nitrite-dependent NO production were investigated using acidified saliva (pH 2.6) and acidic buffer solutions (pH 2.0). Sulfite enhanced NO production in acidified saliva and acidic buffer solutions, and the enhancement increased with the increase in sulfite concentration from 0 to 0.1 mM, whereas suppressed NO production and the suppression increased as the concentration was increased over 0.2 mM. The enhancement was due to the increase in reaction rate between nitrous acid and nitrososulfonate (ONSO(3)(-)) that was formed by the reaction of nitrous acid with hydrogen sulfite, and the suppression was due to the increase in hydrogen sulfite-dependent consumption rate of ONSO(3)(-). A salivary component SCN(-) (1 mM) enhanced and suppressed NO production induced by 1 mM nitrite when sulfite concentrations were lower and higher than 1 mM, respectively. ONSO(3)(-) formed from hydrogen sulfite and nitrosyl thiocyanate (ONSCN), which was produced by the reaction of nitrous acid with SCN(-), seemed to contribute to the enhancement and suppression. NO production induced by nitrite/ascorbic acid systems was suppressed by sulfite, and the suppressive effects were decreased by SCN(-), whereas sulfite-induced suppression of NO production in nitrite/rutin systems was increased by SCN(-). During reactions of nitrite with sulfite in the presence and absence of SCN(-), oxygen was taken up. The oxygen uptake is discussed to be due to autoxidation of NO and radical chain reactions initiated by hydrogen sulfite radicals. The results of the present study suggest that sulfite can enhance and suppress nitrite-dependent NO production. It is discussed that radicals including hydrogen sulfite radicals can be formed through the reactions of nitrite and sulfite in the stomach.
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Affiliation(s)
- Umeo Takahama
- Department of Bioscience, Kyushu Dental College, Kitakyushu, Japan.
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Hornyák I, Marosi K, Kiss L, Gróf P, Lacza Z. Increased stability of S-nitrosothiol solutions via pH modulations. Free Radic Res 2012; 46:214-25. [PMID: 22149535 DOI: 10.3109/10715762.2011.647692] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
S-nitrosothiol (RSNO) solutions represent a valuable source of nitric oxide and could be used as topical vasodilators, but their fast decomposition rate poses a serious obstacle to their potentially widespread therapeutic use. Our aim was to characterize and quantify the effect of pH on S-nitrosothiol formation and decomposition in simple aqueous solutions of S-nitrosoglutathione (GSNO), S-nitroso-N-acetylcysteine (SNAC) and S-nitroso-3-mercaptopropionic acid (SN3MPA). Furthermore, we investigated the effect of storage pH on the stability of GSNO incorporated in poly(ethylene glycol)/ poly(vinyl alcohol) matrices. S-nitrosothiol concentrations were measured spectrophotometrically and laser Doppler scanning method was used to assess dermal blood flow. GSH and NAC solutions reached a complete transformation to nitrosothiols when synthesized using acidic NaNO(2) solution. The initial concentration of all investigated RSNOs decreased more slowly with pH adjusted to mildly basic values (8.4-8.8) for the storage period. Polymer gels of PVA/PEG compositions at mildly basic storage pH further reduced the decomposition rate succeeding to contain 46.8% of the initial GSNO concentration for 25 days. This amount of topically administered GSNO was still capable of increasing the dermal blood flow over 200% in human subjects.
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Affiliation(s)
- István Hornyák
- Semmelweis University, Department of Human Physiology and Clinical Experimental Research, Budapest, Hungary.
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48
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Pristov JB, Mitrović A, Spasojević I. A comparative study of antioxidative activities of cell-wall polysaccharides. Carbohydr Res 2011; 346:2255-9. [DOI: 10.1016/j.carres.2011.07.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 07/14/2011] [Accepted: 07/18/2011] [Indexed: 10/18/2022]
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49
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Spasojević I. Free radicals and antioxidants at a glance using EPR spectroscopy. Crit Rev Clin Lab Sci 2011; 48:114-42. [DOI: 10.3109/10408363.2011.591772] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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50
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Gosset G, Clément JL, Culcasi M, Rockenbauer A, Pietri S. CyDEPMPOs: A class of stable cyclic DEPMPO derivatives with improved properties as mechanistic markers of stereoselective hydroxyl radical adduct formation in biological systems. Bioorg Med Chem 2011; 19:2218-30. [DOI: 10.1016/j.bmc.2011.02.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 02/14/2011] [Accepted: 02/18/2011] [Indexed: 11/28/2022]
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