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Timilsina A, Lokesh S, Shahriar A, Numan T, Schramm T, Stincone P, Nyarko LK, Dewey C, Boiteau R, Petras D, Yang Y. Identifying Quinones in Complex Aqueous Environmental Media (Biochar Extracts) through Tagging with Cysteine and Cysteine-Contained Peptides and High Resolution Mass Spectrometry Analysis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024. [PMID: 39226134 DOI: 10.1021/acs.est.4c04049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2024]
Abstract
Quinones are among the most important components in natural organic matter (NOM) for redox reactions; however, no quinones in complex environmental media have been identified. To aid the identification of quinone-containing molecules in ultracomplex environmental samples, we developed a chemical tagging method that makes use of a Michael addition reaction between quinones and thiols (-SH) in cysteine (Cys) and cysteine-contained peptides (CCP). After the tagging, candidates of quinones in representative aqueous environmental samples (water extractions of biochar) were identified through high-resolution mass spectrometry (HRMS) analysis. The MS and UV spectra analysis showed rapid reactions between Cys/CCP and model quinones with β-carbon from the same benzene ring available for Michael addition. The tagging efficiency was not influenced by other co-occurring nonquinone representative compounds, including caffeic acid, cinnamic acid, and coumaric acid. Cys and CCP were used to tag quinones in water extractions of biochars, and possible candidates of quinones (20 and 53 based on tagging with Cys and CCP, respectively) were identified based on the HRMS features for products of reactions with Cys/CCP. This study has successfully demonstrated that such a Michael addition reaction can be used to tag quinones in complex environmental media and potentially determine their identities. The method will enable an in-depth understanding of the redox chemistry of NOM and its critical chemical compositions and structures.
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Affiliation(s)
- Anil Timilsina
- Department of Civil and Environmental Engineering, University of Nevada, Reno, 1644 N. Virgina Street, Reno, Nevada 89523, United States
| | - Srinidhi Lokesh
- Department of Civil and Environmental Engineering, University of Nevada, Reno, 1644 N. Virgina Street, Reno, Nevada 89523, United States
| | - Abrar Shahriar
- Department of Civil and Environmental Engineering, University of Nevada, Reno, 1644 N. Virgina Street, Reno, Nevada 89523, United States
| | - Travis Numan
- Department of Civil and Environmental Engineering, University of Nevada, Reno, 1644 N. Virgina Street, Reno, Nevada 89523, United States
| | - Tilman Schramm
- CMFI Cluster of Excellence, University of Tuebingen, Auf der Morgenstelle 24, 72076 Tuebingen, Germany
- Department of Biochemistry, University of California Riverside, 169 Aberdeen Dr, Riverside, California 92507, United States
| | - Paolo Stincone
- CMFI Cluster of Excellence, University of Tuebingen, Auf der Morgenstelle 24, 72076 Tuebingen, Germany
| | - Laurinda Korang Nyarko
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, 1500 SW Jefferson Way, Corvallis, Oregon 97331, United States
| | - Christian Dewey
- Department of Chemistry, University of Minnesota, 207 Pleasant Street Se, Minneapolis, Minnesota 55455, United States
| | - Rene Boiteau
- Department of Chemistry, University of Minnesota, 207 Pleasant Street Se, Minneapolis, Minnesota 55455, United States
| | - Daniel Petras
- CMFI Cluster of Excellence, University of Tuebingen, Auf der Morgenstelle 24, 72076 Tuebingen, Germany
- Department of Biochemistry, University of California Riverside, 169 Aberdeen Dr, Riverside, California 92507, United States
| | - Yu Yang
- Department of Civil and Environmental Engineering, University of Nevada, Reno, 1644 N. Virgina Street, Reno, Nevada 89523, United States
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Olson KR, Takata T, Clear KJ, Gao Y, Ma Z, Pfaff E, Mouli K, Kent TA, Jones P, Fukuto J, Wu G, Straub KD. The SOD1 Inhibitor, LCS-1, Oxidizes H2S to Reactive Sulfur Species, Directly and Indirectly, through Conversion of SOD1 to an Oxidase. Antioxidants (Basel) 2024; 13:991. [PMID: 39199236 PMCID: PMC11351665 DOI: 10.3390/antiox13080991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Revised: 07/30/2024] [Accepted: 08/08/2024] [Indexed: 09/01/2024] Open
Abstract
LCS-1, a putative selective inhibitor of SOD1, is a substituted pyridazinone with rudimentary similarity to quinones and naphthoquinones. As quinones catalytically oxidize H2S to biologically active reactive sulfur species (RSS), we hypothesized LCS-1 might have similar attributes. Here, we examine LCS-1 reactions with H2S and SOD1 using thiol-specific fluorophores, liquid chromatography-mass spectrometry, electron paramagnetic resonance (EPR), UV-vis spectrometry, and oxygen consumption. We show that LCS-1 catalytically oxidizes H2S in buffer solutions to form RSS, namely per- and polyhydrosulfides (H2Sn, n = 2-6). These reactions consume oxygen and produce hydrogen peroxide, but they do not have an EPR signature, nor do they affect the UV-vis spectrum. Surprisingly, LCS-1 synergizes with SOD1, but not SOD2, to oxidize H2S to H2S3-6. LCS-1 forms monothiol adducts with H2S, glutathione (GSH), and cysteine (Cys), but not with oxidized glutathione or cystine; both thiol adducts inhibit LCS-1-SOD1 synergism. We propose that LCS-1 forms an adduct with SOD1 that disrupts the intramolecular Cys57-Cys146 disulfide bond and transforms SOD1 from a dismutase to an oxidase. This would increase cellular ROS and polysulfides, the latter potentially affecting cellular signaling and/or cytoprotection.
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Affiliation(s)
- Kenneth R. Olson
- Department of Physiology, Indiana University School of Medicine South Bend, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Tsuyoshi Takata
- Department of Physiology, Indiana University School of Medicine South Bend, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.)
| | - Kasey J. Clear
- Department of Chemistry and Biochemistry, Indiana University South Bend, South Bend, IN 46615, USA;
| | - Yan Gao
- Department of Physiology, Indiana University School of Medicine South Bend, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.)
| | - Zhilin Ma
- Department of Physiology, Indiana University School of Medicine South Bend, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Ella Pfaff
- Department of Physiology, Indiana University School of Medicine South Bend, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Karthik Mouli
- Institute of Biosciences and Technology, Texas A&M Health Sciences Center-Houston Campus, Houston, TX 77030, USA; (K.M.); (T.A.K.)
| | - Thomas A. Kent
- Institute of Biosciences and Technology, Texas A&M Health Sciences Center-Houston Campus, Houston, TX 77030, USA; (K.M.); (T.A.K.)
| | - Prentiss Jones
- Toxicology Department, Western Michigan University Homer Stryker M.D. School of Medicine, Kalamazoo, MI 49007, USA;
| | - Jon Fukuto
- Department of Chemistry, Sonoma State University, Rohnert Park, CA 94928, USA;
| | - Gang Wu
- Department of Internal Medicine, McGovern Medical School, University of Texas, Houston, TX 77030, USA;
| | - Karl D. Straub
- Central Arkansas Veteran’s Healthcare System, Little Rock, AR 72205, USA;
- Departments of Medicine and Biochemistry, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA
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3
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Rodríguez-Valdez G, Martínez-Cerda ME, Mejía-Reyes JG, Tapia-Juárez M, Olmos-Orizaba E, Cortés-Rojo C, Cortés-García CJ, Contreras-Celedón CA, Solorio-Alvarado CR, Chacón-García L. A Metastable Semiquinone Molecular Switch Modulated by Ascorbate/O 2: A Study from a System Far-From-Equilibrium to Biological Assays in Mitochondria. Chembiochem 2024:e202400401. [PMID: 38981854 DOI: 10.1002/cbic.202400401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 07/08/2024] [Accepted: 07/09/2024] [Indexed: 07/11/2024]
Abstract
A molecular switch based on the metastable radical anion derived from a substituted heteroaryl quinone is described. Pyrrolyl quinone thiocyanate (PQ 9) showed an interaction with the fluoride anion that was visible to the naked eye and quantified by UV/vis and 1H and 13 C NMR. The metastable quinoid species formed by the interaction with F- ("ON" state) showed a molecular switching effect autocontrolled by the presence of ascorbate ("OFF" state) and back to the "ON" state by an autooxidation process, measured by visible and UV/vis spectroscopy. Due to its out-of-equilibrium properties and the exchange of matter and energy, a dissipative structural behaviour is proposed. Considering its similarity to the mechanism of coenzyme Q in oxidative phosphophorylation, PQ 9 was evaluated on Saccharomyces cerevisiae mitochondrial function for inhibition of complexes II, III and IV, reactive oxygen species (ROS) production, catalase activity and lipid peroxidation. The results showed that PQ 9 inhibited complex III activity as well as the activity of all electron transport chain (ETC) complexes. In addition, PQ 9 reduced ROS production and catalase activity in yeast. The results suggest that PQ 9 may have potential applications as a new microbicidal compound by inducing ETC dysfunction.
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Affiliation(s)
- Gabriela Rodríguez-Valdez
- Laboratorio de Diseño Molecular, Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B1, Ciudad Universitaria, Francisco J. Múgica S/N, 58030, Morelia, Mexico
| | - Marlen E Martínez-Cerda
- Laboratorio de Diseño Molecular, Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B1, Ciudad Universitaria, Francisco J. Múgica S/N, 58030, Morelia, Mexico
| | - Jisell G Mejía-Reyes
- Laboratorio de Diseño Molecular, Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B1, Ciudad Universitaria, Francisco J. Múgica S/N, 58030, Morelia, Mexico
| | - Melissa Tapia-Juárez
- Laboratorio de Diseño Molecular, Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B1, Ciudad Universitaria, Francisco J. Múgica S/N, 58030, Morelia, Mexico
| | - Eridani Olmos-Orizaba
- Laboratorio de Diseño Molecular, Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B1, Ciudad Universitaria, Francisco J. Múgica S/N, 58030, Morelia, Mexico
| | - Christian Cortés-Rojo
- Laboratorio de Diseño Molecular, Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B1, Ciudad Universitaria, Francisco J. Múgica S/N, 58030, Morelia, Mexico
| | - Carlos J Cortés-García
- Laboratorio de Diseño Molecular, Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B1, Ciudad Universitaria, Francisco J. Múgica S/N, 58030, Morelia, Mexico
| | - Claudia A Contreras-Celedón
- Laboratorio de Diseño Molecular, Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B1, Ciudad Universitaria, Francisco J. Múgica S/N, 58030, Morelia, Mexico
| | - Cesar R Solorio-Alvarado
- División de Ciencias Naturales y Exactas, Departamento de Química, Universidad de Guanajuato, Campus Guanajuato, Noria Alta S/N, 36050, Guanajuato, Mexico
| | - Luis Chacón-García
- Laboratorio de Diseño Molecular, Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B1, Ciudad Universitaria, Francisco J. Múgica S/N, 58030, Morelia, Mexico
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Schmiemann D, Bicks F, Bartels I, Cordes A, Jäger M, Gutmann JS, Hoffmann-Jacobsen K. Enzymatic degradability of diclofenac ozonation products: A mechanistic analysis. CHEMOSPHERE 2024; 358:142112. [PMID: 38677613 DOI: 10.1016/j.chemosphere.2024.142112] [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: 11/23/2023] [Revised: 02/21/2024] [Accepted: 04/21/2024] [Indexed: 04/29/2024]
Abstract
The treatment of waterborne micropollutants, such as diclofenac, presents a significant challenge to wastewater treatment plants due to their incomplete removal by conventional methods. Ozonation is an effective technique for the degradation of micropollutants. However, incomplete oxidation can lead to the formation of ecotoxic by-products that require a subsequent post-treatment step. In this study, we analyze the susceptibility of micropollutant ozonation products to enzymatic digestion with laccase from Trametes versicolor to evaluate the potential of enzymatic treatment as a post-ozonation step. The omnipresent micropollutant diclofenac is used as an example, and the enzymatic degradation kinetics of all 14 detected ozonation products are analyzed by high-performance liquid chromatography coupled with high-resolution mass spectrometry (HPLC-HRMS) and tandem mass spectrometry (MS2). The analysis shows that most of the ozonation products are responsive to chemo-enzymatic treatment but show considerable variation in enzymatic degradation kinetics and efficiencies. Mechanistic investigation of representative transformation products reveals that the hydroxylated aromatic nature of the ozonation products matches the substrate spectrum, facilitating their rapid recognition as substrates by laccase. However, after initiation by laccase, the subsequent chemical pathway of the enzymatically formed radicals determines the global degradability observed in the enzymatic process. Substrates capable of forming stable molecular oxidation products inhibit complete detoxification by oligomerization. This emphasizes that it is not the enzymatic uptake of the substrates but the channelling of the reaction of the substrate radicals towards the oligomerization of the substrate radicals that is the key step in the further development of an enzymatic treatment step for wastewater applications.
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Affiliation(s)
- Dorothee Schmiemann
- Department of Chemistry and Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 32, 47798, Krefeld, Germany; Institute of Physical Chemistry and CENIDE (Center for Nanointegration), University Duisburg-Essen, Universitätsstraße 5, 45141, Essen, Germany
| | - Florian Bicks
- Department of Chemistry and Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 32, 47798, Krefeld, Germany
| | - Indra Bartels
- Department of Chemistry and Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 32, 47798, Krefeld, Germany; Faculty of Chemistry, Instrumental Analytical Chemistry, University of Duisburg-Essen, Universitätsstraße 5, 45141, Essen, Germany
| | - Arno Cordes
- ASA Spezialenzyme GmbH, Am Exer 19c, 38302, Wolfenbüttel, Germany
| | - Martin Jäger
- Department of Chemistry and Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 32, 47798, Krefeld, Germany
| | - Jochen Stefan Gutmann
- Institute of Physical Chemistry and CENIDE (Center for Nanointegration), University Duisburg-Essen, Universitätsstraße 5, 45141, Essen, Germany; Deutsches Textilforschungszentrum Nord-West gGmbH, Adlerstr. 1, 47798, Krefeld, Germany
| | - Kerstin Hoffmann-Jacobsen
- Department of Chemistry and Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 32, 47798, Krefeld, Germany.
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Behera N, Bhattacharyya G, Behera S, Behera RK. Iron mobilization from intact ferritin: effect of differential redox activity of quinone derivatives with NADH/O 2 and in situ-generated ROS. J Biol Inorg Chem 2024; 29:455-475. [PMID: 38780762 DOI: 10.1007/s00775-024-02058-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 04/10/2024] [Indexed: 05/25/2024]
Abstract
Ferritins are multimeric nanocage proteins that sequester/concentrate excess of free iron and catalytically synthesize a hydrated ferric oxyhydroxide bio-mineral. Besides functioning as the primary intracellular iron storehouses, these supramolecular assemblies also oversee the controlled release of iron to meet physiologic demands. By virtue of the reducing nature of the cytosol, reductive dissolution of ferritin-iron bio-mineral by physiologic reducing agents might be a probable pathway operating in vivo. Herein, to explore this reductive iron-release pathway, a series of quinone analogs differing in size, position/nature of substituents and redox potentials were employed to relay electrons from physiologic reducing agent, NADH, to the ferritin core. Quinones are well known natural electron/proton mediators capable of facilitating both 1/2 electron transfer processes and have been implicated in iron/nutrient acquisition in plants and energy transduction. Our findings on the structure-reactivity of quinone mediators highlight that iron release from ferritin is dictated by electron-relay capability (dependent on E1/2 values) of quinones, their molecular structure (i.e., the presence of iron-chelation sites and the propensity for H-bonding) and the type/amount of reactive oxygen species (ROS) they generate in situ. Juglone/Plumbagin released maximum iron due to their intermediate E1/2 values, presence of iron chelation sites, the ability to inhibit in situ generation of H2O2 and form intramolecular H-bonding (possibly promotes semiquinone formation). This study may strengthen our understanding of the ferritin-iron-release process and their significance in bioenergetics/O2-based cellular metabolism/toxicity while providing insights on microbial/plant iron acquisition and the dynamic host-pathogen interactions.
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Affiliation(s)
- Narmada Behera
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha, 769008, India
| | - Gargee Bhattacharyya
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha, 769008, India
| | - Satyabrat Behera
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha, 769008, India
| | - Rabindra K Behera
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha, 769008, India.
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Olson KR, Clear KJ, Takata T, Gao Y, Ma Z, Pfaff E, Travlos A, Luu J, Wilson K, Joseph Z, Kyle I, Kasko SM, Jones Jr P, Fukuto J, Xian M, Wu G, Straub KD. Reaction Mechanisms of H 2S Oxidation by Naphthoquinones. Antioxidants (Basel) 2024; 13:619. [PMID: 38790724 PMCID: PMC11117753 DOI: 10.3390/antiox13050619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/11/2024] [Accepted: 05/14/2024] [Indexed: 05/26/2024] Open
Abstract
1,4-naphthoquinones (NQs) catalytically oxidize H2S to per- and polysufides and sulfoxides, reduce oxygen to superoxide and hydrogen peroxide, and can form NQ-SH adducts through Michael addition. Here, we measured oxygen consumption and used sulfur-specific fluorophores, liquid chromatography tandem mass spectrometry (LC-MS/MS), and UV-Vis spectrometry to examine H2S oxidation by NQs with various substituent groups. In general, the order of H2S oxidization was DCNQ ~ juglone > 1,4-NQ > plumbagin >DMNQ ~ 2-MNQ > menadione, although this order varied somewhat depending on the experimental conditions. DMNQ does not form adducts with GSH or cysteine (Cys), yet it readily oxidizes H2S to polysulfides and sulfoxides. This suggests that H2S oxidation occurs at the carbonyl moiety and not at the quinoid 2 or 3 carbons, although the latter cannot be ruled out. We found little evidence from oxygen consumption studies or LC-MS/MS that NQs directly oxidize H2S2-4, and we propose that apparent reactions of NQs with inorganic polysulfides are due to H2S impurities in the polysulfides or an equilibrium between H2S and H2Sn. Collectively, NQ oxidation of H2S forms a variety of products that include hydropersulfides, hydropolysulfides, sulfenylpolysulfides, sulfite, and thiosulfate, and some of these reactions may proceed until an insoluble S8 colloid is formed.
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Affiliation(s)
- Kenneth R. Olson
- Department of Physiology, Indiana University School of Medicine—South Bend Center, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.); (A.T.); (J.L.); (K.W.); (Z.J.); (I.K.); (S.M.K.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Kasey J. Clear
- Department of Chemistry and Biochemistry, Indiana University South Bend, South Bend, IN 46615, USA;
| | - Tsuyoshi Takata
- Department of Physiology, Indiana University School of Medicine—South Bend Center, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.); (A.T.); (J.L.); (K.W.); (Z.J.); (I.K.); (S.M.K.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Yan Gao
- Department of Physiology, Indiana University School of Medicine—South Bend Center, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.); (A.T.); (J.L.); (K.W.); (Z.J.); (I.K.); (S.M.K.)
| | - Zhilin Ma
- Department of Physiology, Indiana University School of Medicine—South Bend Center, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.); (A.T.); (J.L.); (K.W.); (Z.J.); (I.K.); (S.M.K.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Ella Pfaff
- Department of Physiology, Indiana University School of Medicine—South Bend Center, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.); (A.T.); (J.L.); (K.W.); (Z.J.); (I.K.); (S.M.K.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Anthony Travlos
- Department of Physiology, Indiana University School of Medicine—South Bend Center, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.); (A.T.); (J.L.); (K.W.); (Z.J.); (I.K.); (S.M.K.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Jennifer Luu
- Department of Physiology, Indiana University School of Medicine—South Bend Center, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.); (A.T.); (J.L.); (K.W.); (Z.J.); (I.K.); (S.M.K.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Katherine Wilson
- Department of Physiology, Indiana University School of Medicine—South Bend Center, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.); (A.T.); (J.L.); (K.W.); (Z.J.); (I.K.); (S.M.K.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Zachary Joseph
- Department of Physiology, Indiana University School of Medicine—South Bend Center, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.); (A.T.); (J.L.); (K.W.); (Z.J.); (I.K.); (S.M.K.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Ian Kyle
- Department of Physiology, Indiana University School of Medicine—South Bend Center, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.); (A.T.); (J.L.); (K.W.); (Z.J.); (I.K.); (S.M.K.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Stephen M. Kasko
- Department of Physiology, Indiana University School of Medicine—South Bend Center, South Bend, IN 46617, USA; (T.T.); (Y.G.); (Z.M.); (E.P.); (A.T.); (J.L.); (K.W.); (Z.J.); (I.K.); (S.M.K.)
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Prentiss Jones Jr
- Toxicology Department, Western Michigan University Homer Stryker M.D. School of Medicine, Kalamazoo, MI 49007, USA;
| | - Jon Fukuto
- Department of Chemistry, Sonoma State University, Rohnert Park, CA 94928, USA;
| | - Ming Xian
- Department of Chemistry, Brown University, Providence, RI 02912, USA;
| | - Gang Wu
- Department of Internal Medicine, University of Texas-McGovern Medical School, Houston, TX 77030, USA;
| | - Karl D. Straub
- Central Arkansas Veteran’s Healthcare System, Little Rock, AR 72205, USA;
- Departments of Medicine and Biochemistry, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA
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7
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Lesanavičius M, Seo D, Maurutytė G, Čėnas N. Redox Properties of Bacillus subtilis Ferredoxin:NADP + Oxidoreductase: Potentiometric Characteristics and Reactions with Pro-Oxidant Xenobiotics. Int J Mol Sci 2024; 25:5373. [PMID: 38791410 PMCID: PMC11121358 DOI: 10.3390/ijms25105373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 05/03/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
Bacillus subtilis ferredoxin:NADP+ oxidoreductase (BsFNR) is a thioredoxin reductase-type FNR whose redox properties and reactivity with nonphysiological electron acceptors have been scarcely characterized. On the basis of redox reactions with 3-acetylpyridine adenine dinucleotide phosphate, the two-electron reduction midpoint potential of the flavin adenine dinucleotide (FAD) cofactor was estimated to be -0.240 V. Photoreduction using 5-deazaflavin mononucleotide (5-deazaFMN) as a photosensitizer revealed that the difference in the redox potentials between the first and second single-electron transfer steps was 0.024 V. We examined the mechanisms of the reduction of several different groups of non-physiological electron acceptors catalyzed by BsFNR. The reactivity of quinones and aromatic N-oxides toward BsFNR increased when increasing their single-electron reduction midpoint redox potentials. The reactivity of nitroaromatic compounds was lower due to their lower electron self-exchange rate, but it exhibited the same trend. A mixed single- and two-electron reduction reaction was characteristic of quinones, whereas reactions involving nitroaromatics proceeded exclusively via the one-electron reduction reaction. The oxidation of FADH• to FAD is the rate-limiting step during the oxidation of fully reduced FAD. The calculated electron transfer distances in the reaction with nitroaromatics were close to those of other FNRs including the plant-type enzymes, thus demonstrating their similar active site accessibility to low-molecular-weight oxidants despite the fundamental differences in their structures.
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Affiliation(s)
- Mindaugas Lesanavičius
- Department of Xenobiotics Biochemistry, Institute of Biochemistry, Life Sciences Center, Vilnius University, Saulėtekio Av. 7, LT-10257 Vilnius, Lithuania; (M.L.); (G.M.)
| | - Daisuke Seo
- Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan;
| | - Gintarė Maurutytė
- Department of Xenobiotics Biochemistry, Institute of Biochemistry, Life Sciences Center, Vilnius University, Saulėtekio Av. 7, LT-10257 Vilnius, Lithuania; (M.L.); (G.M.)
| | - Narimantas Čėnas
- Department of Xenobiotics Biochemistry, Institute of Biochemistry, Life Sciences Center, Vilnius University, Saulėtekio Av. 7, LT-10257 Vilnius, Lithuania; (M.L.); (G.M.)
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8
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Li M, Zhang X, Zhang Y, Xu X, Liu Y, Zhang Y, He Z, Wang J, Liang Y. Effect of interaction between dissolved organic matter and iron/manganese (hydrogen) oxides on the degradation of organic pollutants by in-situ advanced oxidation techniques. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 918:170351. [PMID: 38307288 DOI: 10.1016/j.scitotenv.2024.170351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 12/26/2023] [Accepted: 01/19/2024] [Indexed: 02/04/2024]
Abstract
Iron and manganese (hydrogen) oxides (IMHOs) exhibit excellent redox capabilities for environmental pollutants and are commonly used in situ chemical oxidation (ISCO) technologies for the degradation of organic pollutants. However, the coexisting dissolved organic matter (DOMs) in surface environments would influence the degradation behavior and fate of organic pollutants in IMHOs-based ISCO. This review has summarized the interactions and mechanisms between DOMs and IMHOs, as well as the properties of DOM-IMHOs complexes. Importantly, the promotion or inhibition impact of DOM was discussed from three perspectives. First, the presence of DOMs may hinder the accessibility of active sites on IMHOs, thus reducing their efficiency in degrading organic pollutants. The formation of compounds between DOMs and IMHOs alters their stability and activity in the degradation process. Second, the presence of DOMs may also affect the generation and transport of active species, thereby influencing the oxidative degradation process of organic pollutants. Third, specific components within DOMs also participate and affect the degradation pathways and rates. A comprehensive understanding of the interaction between DOMs and IMHOs helps to better understand and predict the degradation process of organic pollutants mediated by IMHOs in real environmental conditions and contributes to the further development and application of IMHO-mediated ISCO technology.
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Affiliation(s)
- Mengke Li
- Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Xin Zhang
- Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Yan Zhang
- Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Xin Xu
- Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Yun Liu
- Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China.
| | - Yaoyao Zhang
- Chinese Academy of Geological Sciences, Beijing 100037, China.
| | - Zhiguo He
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Jieyi Wang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Yuting Liang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
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9
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Wang D, Lin D, Yang X, Wu D, Li P, Zhang Z, Zhang W, Guo Y, Fu S, Zhang N. Alterations in leukocyte telomere length and mitochondrial DNA copy number in benzene poisoning patients. Mol Biol Rep 2024; 51:309. [PMID: 38372835 DOI: 10.1007/s11033-024-09238-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 01/10/2024] [Indexed: 02/20/2024]
Abstract
OBJECTIVE The aim of this study is to examine and evaluate the impact of benzene poisoning on the relative content of the mitochondrial MT-ND1 gene and telomere length in individuals with occupational chronic benzene poisoning (CBP) compared to a control group. The study will analyze and gather data on the mitochondrial gene content and telomere length in cases of benzene poisoning, and investigate the relationship with blood routine parameters in order to contribute scientific experimental data for the prevention and treatment of CBP. METHOD The case group comprised 30 individuals diagnosed with occupational chronic benzene poisoning, whereas the control group consisted of 60 healthy individuals who underwent physical examinations at our hospital concurrently. Blood routine indicators were detected and analyzed, and the PCR method was employed to measure changes in mitochondrial MT-ND1 content and telomere length. Subsequently, a comparison and analysis of the aforementioned indicators was conducted. RESULT The case group exhibited a higher mitochondrial gene content (median 366.2, IQR 90.0 rate) compared to the control group (median 101.5, IQR 12.0 rate), with a statistically significant difference between the two groups (P < 0.05). Additionally, the case group demonstrated lower white blood cell levels (3.78 ± 1.387 × 109/L) compared to the control group (5.74 ± 1.41 × 109/L), with a significant difference between the two groups (P < 0.05). Furthermore, the case group displayed lower red blood cell levels (3.86 ± 0.65 × 1012/L) compared to the control group (4.89 ± 0.65 × 1012/L), with a significant difference between the two groups (P < 0.05). The hemoglobin level in the case group (113.33 ± 16.34 g/L) was lower than that in the control group (138.22 ± 13.22 g/L). There was a significant difference between the two groups (P < 0.05). Platelet levels in the case group (153.80 ± 58.31 × 109/L) is smaller than the control group (244.92 ± 51.99 × 109/L), there was a significant difference between the two groups (P < 0.05). The average telomere length of the normal control group was 1.451 ± 0.475 (rate); The mean telomere length of individuals in the case group diagnosed with benzene poisoning was determined to be 1.237 ± 0.457 (rate). No significant correlation was observed between telomere length and three blood routine parameters, namely white blood cells (WBC), hemoglobin (HB), and platelets (PLT). However, a significant correlation was found between telomere length and red blood cell count (RBC). Additionally, a negative correlation was observed between mitochondrial gene content and white blood cell count (r = - 0.314, P = 0.026), as well as between mitochondrial gene content and red blood cell count (r = - 0.226, P = 0.032). Furthermore, a negative correlation was identified between mitochondrial gene content and hemoglobin (r = - 0.314, P = 0.028), and platelets (r = - 0.445, P = 0.001). CONCLUSION Individuals diagnosed with occupational chronic benzene poisoning exhibit a reduction in telomere length and an elevation in the relative content of the mitochondrial MT-ND1 gene. Moreover, a negative correlation is observed between the content of the mitochondrial MT-ND1 gene and four blood routine parameters, namely white blood cells (WBC), red blood cells (RBC), hemoglobin (HB), and platelets (PLT). Consequently, benzene exposure may potentially contribute to the onset of premature aging.
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Affiliation(s)
- Dianpeng Wang
- Medical Laboratory, Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, 518020, China.
- School of Public Health, Southern Medical University, Guangzhou, 510515, China.
| | - Dafeng Lin
- Medical Laboratory, Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, 518020, China
| | - Xiangli Yang
- Medical Laboratory, Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, 518020, China
| | - Dongpeng Wu
- Medical Laboratory College Hebei North University in China, Zhangjiakou, 075000, Hebei, China
| | - Peimao Li
- Medical Laboratory, Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, 518020, China
| | - Zhimin Zhang
- Medical Laboratory, Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, 518020, China
| | - Wen Zhang
- Medical Laboratory, Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, 518020, China
| | - Yan Guo
- Medical Laboratory, Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, 518020, China
| | - Song Fu
- Medical Laboratory College Hebei North University in China, Zhangjiakou, 075000, Hebei, China
| | - Naixing Zhang
- Medical Laboratory, Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, 518020, China.
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10
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Ma B, Gong Y, Long Y, Chen Z, Yuan Y, Yang J. Synthesis of Acylhydroquinones through Visible-Light-Mediated Hydroacylation of Quinones with α-Keto Acids. J Org Chem 2024; 89:1669-1680. [PMID: 38204383 DOI: 10.1021/acs.joc.3c02361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
A mild and eco-friendly visible-light-induced protocol for the hydroacylation of quinones with α-keto acids has been developed. In the absence of any catalyst or additive, the decarboxylative hydroacylation proceeded smoothly under visible-light irradiation at room temperature. A wide range of quinones and α-keto acids were well-tolerated and afforded hydroacylation products up to 88% isolated yield. The reaction can be scaled up, and the induced groups are useful for further synthetic applications. Preliminarily, mechanistic studies indicated that photoactive quinones absorb visible light to facilitate the transformation.
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Affiliation(s)
- Ben Ma
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Yawen Gong
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Yun'e Long
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Zhiyong Chen
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Yong Yuan
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Jingya Yang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
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11
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Zhou Y, Lei Y, Kong Q, Cheng F, Fan M, Deng Y, Zhao Q, Qiu J, Wang P, Yang X. o-Semiquinone Radical and o-Benzoquinone Selectively Degrade Aniline Contaminants in the Periodate-Mediated Advanced Oxidation Process. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:2123-2132. [PMID: 38237556 DOI: 10.1021/acs.est.3c08179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
Advanced oxidation processes (AOPs) often employ strong oxidizing inorganic radicals (e.g., hydroxyl and sulfate radicals) to oxidize contaminants in water treatment. However, the water matrix could scavenge the strong oxidizing radicals, significantly deteriorating the treatment efficiency. Here, we report a periodate/catechol process in which reactive quinone species (RQS) including the o-semiquinone radical (o-SQ•-) and o-benzoquinone (o-Q) were dominant to effectively degrade anilines within 60 s. The second-order reaction rate constants of o-SQ•- and o-Q with aniline were determined to be 1.0 × 108 and 4.0 × 103 M-1 s-1, respectively, at pH 7.0, which accounted for 21% and 79% of the degradation of aniline with a periodate-to-catechol molar ratio of 1:1. The major byproducts were generated via addition or polymerization. The RQS-based process exhibited excellent anti-interference performance in the degradation of aniline-containing contaminants in real water samples in the presence of diverse inorganic ions and organics. Subsequently, we extended the RQS-based process by employing tea extract and dissolved organic matter as catechol replacements as well as metal ions [e.g., Fe(III) or Cu(II)] as periodate replacements, which also exhibited good performance in aniline degradation. This study provides a novel strategy to develop RQS-based AOPs for the highly selective degradation of aniline-containing emerging contaminants.
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Affiliation(s)
- Yangjian Zhou
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Yu Lei
- Key Laboratory of Photochemistry, Institute of Chemistry Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
| | - Qingqing Kong
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Fangyuan Cheng
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun 130117, China
| | - Mengge Fan
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Yanchun Deng
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Qing Zhao
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Junlang Qiu
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Peng Wang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Xin Yang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
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12
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Silva LL, Stratford RE, Messmann R, Kelley MR, Quinney SK. Bridging population pharmacokinetic and semimechanistic absorption modeling of APX3330. CPT Pharmacometrics Syst Pharmacol 2024; 13:106-117. [PMID: 37884051 PMCID: PMC10787204 DOI: 10.1002/psp4.13061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 08/16/2023] [Accepted: 09/25/2023] [Indexed: 10/28/2023] Open
Abstract
APX3330 ((2E)-2-[(4,5-dimethoxy-2-methyl-3,6-dioxo-1,4-cyclohexadien-1-yl)methylene]-undecanoic acid), a selective inhibitor of APE1/Ref-1, has been investigated in treatment of hepatitis, cancer, diabetic retinopathy, and macular edema. APX3330 is administered orally as a quinone but is rapidly converted to the hydroquinone form. This study describes the pharmacokinetics of APX3330 and explores effect of food on absorption. Total plasma quinone concentrations of APX3330 were obtained following oral administration from studies in healthy Japanese male subjects (single dose-escalation; multiple-dose; food-effect) and patients with cancer patients. Nonlinear mixed effects modeling was performed using Monolix to estimate pharmacokinetic parameters and assess covariate effects. To further evaluate the effect of food on absorption, a semi-physiologic pharmacokinetic model was developed in Gastroplus to delineate effects of food on dissolution and absorption. A two-compartment, first order absorption model with lag time best described plasma concentration-time profiles from 49 healthy Japanese males. Weight was positively correlated with apparent clearance (CL/F) and volume. Administration with food led to an 80% higher lag time. CL/F was 41% higher in the cancer population. The semi-physiologic model indicates a switch from dissolution-rate control of absorption in the fasted-state to gastric emptying rate determining absorption rate in the fed-state. Oral clearance of APX3330 is higher in patients with cancer than healthy Japanese males, possibly due to reduced serum albumin in patients with cancer. Delayed APX3330 absorption with food may be related to higher conversion to the more soluble but less permeable hydroquinone form in the gastrointestinal tract. Future work should address pharmacokinetic differences between APX3330 quinone and hydroquinone forms.
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Affiliation(s)
- Larissa L. Silva
- Division of Clinical Pharmacology, Department of MedicineIndiana University School of MedicineIndianaIndianapolisUSA
| | - Robert E. Stratford
- Division of Clinical Pharmacology, Department of MedicineIndiana University School of MedicineIndianaIndianapolisUSA
| | | | - Mark R. Kelley
- Departments of Biochemistry and Molecular Biology, and Pharmacology and ToxicologyIndiana University School of MedicineIndianapolisIndianaUSA
- Department of PediatricsHerman B Wells Center for Pediatric Research, Indiana University School of MedicineIndianapolisIndianaUSA
- Indiana University Simon Comprehensive Cancer CenterIndiana University School of MedicineIndianapolisIndianaUSA
| | - Sara K. Quinney
- Division of Clinical Pharmacology, Department of MedicineIndiana University School of MedicineIndianaIndianapolisUSA
- Indiana University Simon Comprehensive Cancer CenterIndiana University School of MedicineIndianapolisIndianaUSA
- Department of Obstetrics and GynecologyIndiana University School of MedicineIndianapolisIndianaUSA
- Center for Computational Biology and BioinformaticsIndiana University School of MedicineIndianapolisIndianaUSA
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13
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Kang K, Schenkeveld WDC, Weber G, Kraemer SM. Stability of Coumarins and Determination of the Net Iron Oxidation State of Iron-Coumarin Complexes: Implications for Examining Plant Iron Acquisition Mechanisms. ACS EARTH & SPACE CHEMISTRY 2023; 7:2339-2352. [PMID: 38148994 PMCID: PMC10749481 DOI: 10.1021/acsearthspacechem.3c00199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 10/16/2023] [Accepted: 10/16/2023] [Indexed: 12/28/2023]
Abstract
Coumarins are exuded into the soil environment by plant roots in response to iron (Fe) deficiency. Previous studies have shown that coumarins can increase the Fe solubility upon interaction with sparsely soluble Fe(III) (hydr)oxide. However, the chemical mechanisms of Fe(III) (hydr)oxide dissolution by coumarins remain unclear. The high redox instability of dissolved coumarins and the interference of coumarins in determining the Fe redox state hinder the quantitative and mechanistic investigation of coumarin-induced Fe mobilization. In this study, we investigated the oxidative stability of three coumarins that have been found in root exudates, esculetin, scopoletin, and fraxetin, over a broad pH range under oxic and anoxic conditions. Our results show that the oxidation of coumarins is irreversible under oxic conditions and that oxidative degradation rates increased with increasing pH under both oxic and anoxic conditions. However, the complexation of Fe protects coumarins from degradation in the circumneutral pH range even under oxic conditions. Furthermore, we observed that Ferrozine, which is commonly used for establishing Fe redox speciation, can facilitate the reduction of Fe(III) complexed by coumarins, even at circumneutral pH. Reduction rates increased with decreasing pH and were larger for fraxetin than for scopoletin and esculetin. Based on these observations, we optimized the Ferrozine method for determining the redox state of Fe complexed by coumarins. Understanding the stability of dissolved coumarins and using a precise analytical method to determine the redox state of Fe in the presence of coumarins are critical for investigating the mechanisms by which coumarins enhance the availability of Fe in the rhizosphere.
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Affiliation(s)
- Kyounglim Kang
- Environmental
Geochemistry, Centre for Microbiology and Environmental Systems Science, University of Vienna, 1090 Vienna, Austria
| | - Walter D. C. Schenkeveld
- Soil
Chemistry and Chemical Soil Quality, Environmental Sciences, Wageningen University, 6708 PB, Wageningen 6700 AA, The Netherlands
| | - Guenther Weber
- Leibniz-Institut
für Analytische Wissenschaften − ISAS, 44227 Dortmund, Germany
| | - Stephan M. Kraemer
- Environmental
Geochemistry, Centre for Microbiology and Environmental Systems Science, University of Vienna, 1090 Vienna, Austria
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14
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Akutsu Y, Fujiwara T, Suzuki R, Nishigaya Y, Yamazaki T. Juglone, a plant-derived 1,4-naphthoquinone, binds to hydroxylamine oxidoreductase and inhibits the electron transfer to cytochrome c554. Appl Environ Microbiol 2023; 89:e0129123. [PMID: 38009977 PMCID: PMC10734522 DOI: 10.1128/aem.01291-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 09/20/2023] [Indexed: 11/29/2023] Open
Abstract
IMPORTANCE Nitrification, the microbial conversion of ammonia to nitrate via nitrite, plays a pivotal role in the global nitrogen cycle. However, the excessive use of ammonium-based fertilizers in agriculture has disrupted this cycle, leading to groundwater pollution and greenhouse gas emissions. In this study, we have demonstrated the inhibitory effects of plant-derived juglone and related 1,4-naphthoquinones on the nitrification process in Nitrosomonas europaea. Notably, the inhibition mechanism is elucidated in which 1,4-naphthoquinones interact with hydroxylamine oxidoreductase, disrupting the electron transfer to cytochrome c554, a physiological electron acceptor. These findings support the notion that phytochemicals can impede nitrification by interfering with the essential electron transfer process in ammonia oxidation. The findings presented in this article offer valuable insights for the development of strategies aimed at the management of nitrification, reduction of fertilizer utilization, and mitigation of greenhouse gas emissions.
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Affiliation(s)
- Yukie Akutsu
- Research Center for Advanced Analysis, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Takaaki Fujiwara
- Research Center for Advanced Analysis, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Rintaro Suzuki
- Research Center for Advanced Analysis, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | | | - Toshimasa Yamazaki
- Research Center for Advanced Analysis, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
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15
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Wagner BA, Buettner GR. Stability of aqueous solutions of ascorbate for basic research and for intravenous administration. ADVANCES IN REDOX RESEARCH : AN OFFICIAL JOURNAL OF THE SOCIETY FOR REDOX BIOLOGY AND MEDICINE AND THE SOCIETY FOR FREE RADICAL RESEARCH-EUROPE 2023; 9:100077. [PMID: 37808406 PMCID: PMC10552410 DOI: 10.1016/j.arres.2023.100077] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Ascorbate (vitamin C) can rapidly oxidize in many near-neutral pH, aqueous solutions. We report on the stability of ascorbate solutions prepared for infusion into patients using standard pharmacy protocols, for example, 75 g of ascorbate/L in water for infusion. The concentration of ascorbate was monitored for changes over time using direct UV-Vis spectroscopy. The pH of the solution was about 5.7 with no significant change over 24 h. There was only an approximate loss of 1% per day over the first 3 days of storage. This information allows decisions on how far ahead of need such preparations can be made. We also provide laboratory approaches to minimize or control the rate of oxidation of ascorbate solutions for use in chemical and biochemical studies as well as preclinical animal studies. The goal is to have the amount of ascorbate intended to be used in experiments be the actual amount available.
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Affiliation(s)
- Brett A. Wagner
- Free Radical and Radiation Biology Program, ESR Facility, The University of Iowa, Iowa City, IA 52242, USA
| | - Garry R. Buettner
- Free Radical and Radiation Biology Program, ESR Facility, The University of Iowa, Iowa City, IA 52242, USA
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16
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Komatsu H, Velychkivska N, Shatan AB, Shindo Y, Oka K, Ariga K, Hill JP, Labuta J. Kinetic study of NADPH activation using ubiquinone-rhodol fluorescent probe and an Ir III-complex promoter at the cell interior. RSC Adv 2023; 13:34012-34019. [PMID: 38020010 PMCID: PMC10658984 DOI: 10.1039/d3ra05412h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 11/14/2023] [Indexed: 12/01/2023] Open
Abstract
Nicotine adenine dinucleotide derivatives NADH and NADPH are intimately involved in energy and electron transport within cells. The fluorescent ubiquinone-rhodol (Q-Rh) probe is used for NADPH activation monitoring. Q-Rh reacts with NADPH yielding its quenched hydroquinone-rhodol (H2Q-Rh) form with concurrent NADPH activation (i.e. NADP+ formation). NADPH activation can be enhanced by the addition of an IrIII-complex (i.e. [(η5-C5Me5)Ir(phen)(H2O)]2+) as a promoter. The rate of the Q-Rh fluorescence quenching process is proportional to the NADPH activation rate, which can be used to monitor NADPH. Experiments were performed in phosphate-buffered saline (PBS) solution and on HeLa cell cultures to analyze the kinetics of Q-Rh reduction and the influence of the IrIII-complex promoter on the activation of NADPH (in PBS) and of other intracellular reducing agents (in HeLa cells). There is a substantial increase in Q-Rh reduction rate inside HeLa cells especially after the addition of IrIII-complex promoter. This increase is partly due to a leakage process (caused by IrIII-complex-induced downstream processes which result in cell membrane disintegration) but also involves the nonspecific activation of other intracellular reducing agents, including NADH, FADH2, FMNH2 or GSH. In the presence only of Q-Rh, the activation rate of intracellular reducing agents is 2 to 8 times faster in HeLa cells than in PBS solution. When both Q-Rh and IrIII-complex are present, the rate of the IrIII-complex catalyzed reduction reaction is 7 to 23 times more rapid in HeLa cells. Concentration- and time-dependent fluorescence attenuation of Q-Rh with third-order reaction kinetics (reasonably approximated as pseudo-first-order in Q-Rh) has been observed and modelled. This reaction and its kinetics present an example of "bioparallel chemistry", where the activation of a molecule can trigger a unique chemical process. This approach stands in contrast to the conventional concept of "bioorthogonal chemistry", which refers to chemical reactions that occur without disrupting native biological processes.
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Affiliation(s)
- Hirokazu Komatsu
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Nadiia Velychkivska
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
- Institute of Macromolecular Chemistry, Czech Academy of Sciences Heyrovsky Sq. 2 Prague 6 162 06 Czech Republic
| | - Anastasiia B Shatan
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
- Institute of Macromolecular Chemistry, Czech Academy of Sciences Heyrovsky Sq. 2 Prague 6 162 06 Czech Republic
| | - Yutaka Shindo
- Department of Bioscience and Informatics, Faculty of Science and Technology, Keio University 3-14-1 Hiyoshi, Kohoku Yokohama Kanagawa 223-8522 Japan
| | - Kotaro Oka
- Department of Bioscience and Informatics, Faculty of Science and Technology, Keio University 3-14-1 Hiyoshi, Kohoku Yokohama Kanagawa 223-8522 Japan
- Waseda Research Institute for Science and Engineering, Waseda University 2-2 Wakamatsucho, Shinjuku-ku Tokyo 162-8480 Japan
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University Kaohsiung City 80708 Taiwan
| | - Katsuhiko Ariga
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo 5-1-5 Kashiwanoha, Kashiwa Chiba 277-8561 Japan
| | - Jonathan P Hill
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Jan Labuta
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
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17
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Day CS, Martin R. Comproportionation and disproportionation in nickel and copper complexes. Chem Soc Rev 2023; 52:6601-6616. [PMID: 37655600 DOI: 10.1039/d2cs00494a] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Disproportionation and comproportionation reactions have become increasingly important electron transfer events in organometallic chemistry and catalysis. The renewed interest in these reactions is in part attributed to the improved understanding of first-row metals and their ability to occupy odd and even oxidation states. Disproportionation and comproportionation reactions enable metal complexes to shuttle between various oxidation states, a matter of utmost relevance for controlling the speciation and catalytic turnover. In addition, these reactions have a direct impact in the thermodynamic and kinetic stability of the corresponding metal complexes. This review covers the relevance and impact of these processes in electron transfer reactions and provides valuable information about their non-negligible influence in Ni- and Cu-catalysed transformations.
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Affiliation(s)
- Craig S Day
- The Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus, Denmark.
| | - Ruben Martin
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain.
- ICREA, Passeig Lluís Companys, 23, 08010, Barcelona, Spain
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18
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Lokesh S, Lard ML, Cook RL, Yang Y. Critical Role of Semiquinones in Reductive Dehalogenation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:14218-14225. [PMID: 37668505 DOI: 10.1021/acs.est.3c03981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Quinones and products of their redox reactions (hydroquinones and semiquinones) have been suggested as important players in the reductive dehalogenation of organohalogens mediated by natural and pyrogenic organic matter, although based on limited direct evidence. This study focused on the reductive dehalogenation of a model organohalogen (triclosan) by 1,4-benzohydroquinone (H2Q). In the presence of H2Q only, degradation of triclosan does not occur within the experimental period (up to 288 h); however, it takes place in the presence of H2Q and FeCl3 under anoxic conditions at pH 5 and 7 (above the pKa of SQ = 4.1) only to be halted in the presence of dissolved oxygen. Kinetic simulation and thermodynamic calculations indicated that benzosemiquinone (SQ-) is responsible for the reductive degradation of triclosan, with the fitted rate constant for the reaction between SQ- and triclosan being 317 M-2 h-1. The critical role of semiquinones in reductive dehalogenation can be relevant to a wide range of quinones in natural and engineering systems based on the reported oxidation-reduction potentials of quinones/semiquinones and semiquinones/hydroquinones and supported by experiments with additional model hydroquinones.
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Affiliation(s)
- Srinidhi Lokesh
- Department of Civil and Environmental Engineering, University of Nevada, Reno, 1664 N. Virginia Street, Reno, Nevada 89557, United States
| | - Myron L Lard
- Department of Chemistry, Louisiana State University, 307 Choppin Hall, Baton Rouge, Louisiana 70803, United States
| | - Robert L Cook
- Department of Chemistry, Louisiana State University, 307 Choppin Hall, Baton Rouge, Louisiana 70803, United States
| | - Yu Yang
- Department of Civil and Environmental Engineering, University of Nevada, Reno, 1664 N. Virginia Street, Reno, Nevada 89557, United States
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19
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Fraser BA, Wilkins AL, De Iuliis GN, Rebourcet D, Nixon B, Aitken RJ. Development of a model for studying the developmental consequences of oxidative sperm DNA damage by targeting redox-cycling naphthoquinones to the Sertoli cell population. Free Radic Biol Med 2023; 206:50-62. [PMID: 37356777 DOI: 10.1016/j.freeradbiomed.2023.06.008] [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: 05/11/2023] [Revised: 06/07/2023] [Accepted: 06/12/2023] [Indexed: 06/27/2023]
Abstract
Oxidative stress can be induced in the testes by a wide range of factors, including scrotal hyperthermia, varicocele, environmental toxicants, obesity and infection. The clinical consequences of such stress include the induction of genetic damage in the male germ line which may, in turn, have serious implications for the health and wellbeing of the progeny. In order to confirm the transgenerational impact of oxidative stress in the testes, we sought to develop an animal model in which this process could be analysed. Our primary approach to this problem was to induce Sertoli cells (robust, terminally differentiated, tissue-specific testicular cells whose radioresistance indicates significant resistance to oxidative stress) to generate high levels of reactive oxygen species (ROS) within the testes. To achieve this aim, six follicle-stimulating hormone (FSH) peptides were developed and compared for selective targeting to Sertoli cells both in vitro and in vivo. Menadione, a redox-cycling agent, was then conjugated to the most promising FSH candidate using a linker that had been optimised to enable maximum production of ROS in the targeted cells. A TM4 Sertoli cell line co-incubated with the FSH-menadione conjugate in vitro exhibited significantly higher levels of mitochondrial ROS generation (10-fold), lipid peroxidation (2-fold) and oxidative DNA damage (2-fold) than the vehicle control. Additionally, in a proof-of-concept study, ten weeks after a single injection of the FSH-menadione conjugate in vivo, injected male mice were found to exhibit a 1.6 fold increase in DNA double strand breaks and 13-fold increase in oxidative DNA damage to their spermatozoa while still retaining their ability to initiate a pregnancy. We suggest this model could now be used to study the influence of chronic oxidative stress on testicular function with emphasis on the impact of DNA damage in the male germ line on the mutational profile and health of future generations.
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Affiliation(s)
- Barbara Anne Fraser
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, 2308, Australia; Pregnancy and Reproduction Program, Hunter Medical Research Institute, Kookaburra Cct, New Lambton Heights, NSW, 2305, Australia; College of Engineering, Science and Environment, University of Newcastle, Callaghan, NSW, 2308, Australia.
| | - Alexandra Louise Wilkins
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, 2308, Australia; Pregnancy and Reproduction Program, Hunter Medical Research Institute, Kookaburra Cct, New Lambton Heights, NSW, 2305, Australia; College of Engineering, Science and Environment, University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Geoffry Nunzio De Iuliis
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, 2308, Australia; Pregnancy and Reproduction Program, Hunter Medical Research Institute, Kookaburra Cct, New Lambton Heights, NSW, 2305, Australia; College of Engineering, Science and Environment, University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Diane Rebourcet
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, 2308, Australia; Pregnancy and Reproduction Program, Hunter Medical Research Institute, Kookaburra Cct, New Lambton Heights, NSW, 2305, Australia; College of Engineering, Science and Environment, University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Brett Nixon
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, 2308, Australia; Pregnancy and Reproduction Program, Hunter Medical Research Institute, Kookaburra Cct, New Lambton Heights, NSW, 2305, Australia; College of Engineering, Science and Environment, University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Robert John Aitken
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, 2308, Australia; Pregnancy and Reproduction Program, Hunter Medical Research Institute, Kookaburra Cct, New Lambton Heights, NSW, 2305, Australia; College of Engineering, Science and Environment, University of Newcastle, Callaghan, NSW, 2308, Australia
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20
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Xia Q, Zhou Y, Yang X, Zhang Y, Wang J, Song G. Solvent-switchable regioselective 1,2- or 1,6-addition of quinones with boronic acids. Chem Commun (Camb) 2023. [PMID: 37334622 DOI: 10.1039/d3cc01968c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
An efficient copper-catalyzed solvent-switchable regioselective 1,2- or 1,6-addition of quinones with boronic acids has been developed. This novel catalytic protocol for the synthesis of various quinols and 4-phenoxyphenols was enabled by a simple solvent swap between H2O and MeOH. It features mild reaction conditions, simple and easy operation, broad substrate scope and excellent regioselectivity. The gram-scale reactions as well as the further transformations of both addition products were also successfully investigated.
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Affiliation(s)
- Qi Xia
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, PR China.
| | - Yaxuan Zhou
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, PR China.
| | - Xiaoning Yang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, PR China.
| | - Yanqiu Zhang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, PR China.
| | - Jiayi Wang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, PR China.
| | - Gonghua Song
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, PR China.
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21
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López de Felipe F. Revised Aspects into the Molecular Bases of Hydroxycinnamic Acid Metabolism in Lactobacilli. Antioxidants (Basel) 2023; 12:1294. [PMID: 37372024 DOI: 10.3390/antiox12061294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/29/2023] Open
Abstract
Hydroxycinnamic acids (HCAs) are phenolic compounds produced by the secondary metabolism of edible plants and are the most abundant phenolic acids in our diet. The antimicrobial capacity of HCAs is an important function attributed to these phenolic acids in the defense of plants against microbiological threats, and bacteria have developed diverse mechanisms to counter the antimicrobial stress imposed by these compounds, including their metabolism into different microbial derivatives. The metabolism of HCAs has been intensively studied in Lactobacillus spp., as the metabolic transformation of HCAs by these bacteria contributes to the biological activity of these acids in plant and human habitats or to improve the nutritional quality of fermented foods. The main mechanisms known to date used by Lactobacillus spp. to metabolize HCAs are enzymatic decarboxylation and/or reduction. Here, recent advances in the knowledge regarding the enzymes that contribute to these two enzymatic conversions, the genes involved, their regulation and the physiological significance to lactobacilli are reviewed and critically discussed.
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Affiliation(s)
- Félix López de Felipe
- Laboratorio de Biotecnología Bacteriana, Instituto de Ciencia y Tecnología de los Alimentos y Nutrición (ICTAN), CSIC, José Antonio Novais 10, 28040 Madrid, Spain
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22
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Olson KR, Clear KJ, Gao Y, Ma Z, Cieplik NM, Fiume AR, Gaziano DJ, Kasko SM, Luu J, Pfaff E, Travlos A, Velander C, Wilson KJ, Edwards ED, Straub KD, Wu G. Redox and Nucleophilic Reactions of Naphthoquinones with Small Thiols and Their Effects on Oxidization of H 2S to Inorganic and Organic Hydropolysulfides and Thiosulfate. Int J Mol Sci 2023; 24:ijms24087516. [PMID: 37108682 PMCID: PMC10138938 DOI: 10.3390/ijms24087516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 04/10/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
Naphthoquinone (1,4-NQ) and its derivatives (NQs, juglone, plumbagin, 2-methoxy-1,4-NQ, and menadione) have a variety of therapeutic applications, many of which are attributed to redox cycling and the production of reactive oxygen species (ROS). We previously demonstrated that NQs also oxidize hydrogen sulfide (H2S) to reactive sulfur species (RSS), potentially conveying identical benefits. Here we use RSS-specific fluorophores, mass spectroscopy, EPR and UV-Vis spectrometry, and oxygen-sensitive optodes to examine the effects of thiols and thiol-NQ adducts on H2S-NQ reactions. In the presence of glutathione (GSH) and cysteine (Cys), 1,4-NQ oxidizes H2S to both inorganic and organic hydroper-/hydropolysulfides (R2Sn, R=H, Cys, GSH; n = 2-4) and organic sulfoxides (GSnOH, n = 1, 2). These reactions reduce NQs and consume oxygen via a semiquinone intermediate. NQs are also reduced as they form adducts with GSH, Cys, protein thiols, and amines. Thiol, but not amine, adducts may increase or decrease H2S oxidation in reactions that are both NQ- and thiol-specific. Amine adducts also inhibit the formation of thiol adducts. These results suggest that NQs may react with endogenous thiols, including GSH, Cys, and protein Cys, and that these adducts may affect both thiol reactions as well as RSS production from H2S.
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Affiliation(s)
- Kenneth R Olson
- Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Kasey J Clear
- Department of Chemistry and Biochemistry, Indiana University South Bend, South Bend, IN 46615, USA
| | - Yan Gao
- Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
| | - Zhilin Ma
- Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Nathaniel M Cieplik
- Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Alyssa R Fiume
- Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Dominic J Gaziano
- Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Stephen M Kasko
- Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Jennifer Luu
- Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Ella Pfaff
- Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Anthony Travlos
- Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Cecilia Velander
- Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Katherine J Wilson
- Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Elizabeth D Edwards
- Department of Chemistry and Biochemistry, Indiana University South Bend, South Bend, IN 46615, USA
| | - Karl D Straub
- Central Arkansas Veteran's Healthcare System, Little Rock, AR 72205, USA
- Departments of Medicine and Biochemistry, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA
| | - Gang Wu
- Department of Internal Medicine, The University of Texas-McGovern Medical School, Houston, TX 77030, USA
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23
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Schmiemann D, Hohenschon L, Bartels I, Hermsen A, Bachmann F, Cordes A, Jäger M, Gutmann JS, Hoffmann-Jacobsen K. Enzymatic post-treatment of ozonation: laccase-mediated removal of the by-products of acetaminophen ozonation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:53128-53139. [PMID: 36853537 PMCID: PMC10119220 DOI: 10.1007/s11356-023-25913-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
Ozonation is a powerful technique to remove micropollutants from wastewater. As chemical oxidation of wastewater comes with the formation of varying, possibly persistent and toxic by-products, post-treatment of the ozonated effluent is routinely suggested. This study explored an enzymatic treatment of ozonation products using the laccase from Trametes versicolor. A high-performance liquid chromatography coupled with high-resolution mass spectrometry (HPLC-HRMS) analysis revealed that the major by-products were effectively degraded by the enzymatic post-treatment. The enzymatic removal of the by-products reduced the ecotoxicity of the ozonation effluent, as monitored by the inhibition of Aliivibrio fischeri. The ecotoxicity was more effectively reduced by enzymatic post-oxidation at pH 7 than at the activity maximum of the laccase at pH 5. A mechanistic HPLC-HRMS and UV/Vis spectroscopic analysis revealed that acidic conditions favored rapid conversion of the phenolic by-products to dead-end products in the absence of nucleophiles. In contrast, the polymerization to harmless insoluble polymers was favored at neutral conditions. Hence, coupling ozonation with laccase-catalyzed post-oxidation at neutral conditions, which are present in wastewater effluents, is suggested as a new resource-efficient method to remove persistent micropollutants while excluding the emission of potentially harmful by-products.
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Affiliation(s)
- Dorothee Schmiemann
- Department of Chemistry and Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 32, 47798, Krefeld, Germany
- Institute of Physical Chemistry and CENIDE (Center for Nanointegration), University Duisburg-Essen, Universitätsstraße 5, 45141, Essen, Germany
| | - Lisa Hohenschon
- Department of Chemistry and Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 32, 47798, Krefeld, Germany
- Wfk-Cleaning Technology-Institute e.V., Campus Fichtenhain 11, 47807, Krefeld, Germany
| | - Indra Bartels
- Department of Chemistry and Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 32, 47798, Krefeld, Germany
- Faculty of Chemistry, Instrumental Analytical Chemistry, University of Duisburg-Essen, Universitätsstraße 5, 45141, Essen, Germany
| | - Andrea Hermsen
- Department of Chemistry and Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 32, 47798, Krefeld, Germany
- Institute of Theoretical Chemistry, University Duisburg-Essen, Universitätsstraße 5, 45141, Essen, Germany
| | - Felix Bachmann
- ASA Spezialenzyme GmbH, Am Exer 19C, 38302, Wolfenbüttel, Germany
| | - Arno Cordes
- ASA Spezialenzyme GmbH, Am Exer 19C, 38302, Wolfenbüttel, Germany
| | - Martin Jäger
- Department of Chemistry and Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 32, 47798, Krefeld, Germany
| | - Jochen Stefan Gutmann
- Institute of Physical Chemistry and CENIDE (Center for Nanointegration), University Duisburg-Essen, Universitätsstraße 5, 45141, Essen, Germany
- Deutsches Textilforschungszentrum Nord-West gGmbH, Adlerstr. 1, 47798, Krefeld, Germany
| | - Kerstin Hoffmann-Jacobsen
- Department of Chemistry and Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 32, 47798, Krefeld, Germany.
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24
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Nowicka B, Walczak J, Kapsiak M, Barnaś K, Dziuba J, Suchoń A. Impact of cytotoxic plant naphthoquinones, juglone, plumbagin, lawsone and 2-methoxy-1,4-naphthoquinone, on Chlamydomonas reinhardtii reveals the biochemical mechanism of juglone toxicity by rapid depletion of plastoquinol. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 197:107660. [PMID: 36996637 DOI: 10.1016/j.plaphy.2023.107660] [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: 12/01/2022] [Revised: 03/18/2023] [Accepted: 03/20/2023] [Indexed: 06/19/2023]
Abstract
Hydrophilic, untethered 1,4-naphthoquinones (1,4-NQs) are plant secondary metabolites that are often excreted into the environment and play a role in various plant-microbial, plant-fungal, plant-insect and plant-plant interactions. The biological activity of 1,4-NQs is mainly related to their redox properties, i.e. the ability to undergo redox cycling in cells. These compounds may also undergo electrophilic addition to thiol-containing compounds. The aim of this study was to compare the impact of juglone, plumbagin, lawsone and 2-methoxy-1,4-naphthoquinone (2-met-NQ) on the antioxidant response of the green microalga Chlamydomonas reinhardtii. The algae were incubated with the examined compounds under low light for 6 h and the content of photosynthetic pigments, prenyllipid antioxidants, ascorbate, soluble thiols, proline, and superoxide dismutase activity was assessed. To examine the interaction between photosynthetic activity and naphthoquinone toxicity, we carried out the second experiment, in which C. reinhardtii was incubated with 1,4-NQs for 1 h under high light or in darkness. The pro-oxidant action of the examined 1,4-NQs depended on their reduction potentials, which decrease in order: juglone > plumbagin > 2-met-NQ > lawsone. Lawsone did not display pro-oxidant properties. Exposure to high light strongly enhanced the pro-oxidant effect of juglone, plumbagin, and 2-met-NQ, which is thought to result from the interception of the electrons from photosynthetic electron transfer chain. Only juglone was able to cause a fast depletion of plastoquinol, which may be an important mode of action of this allelochemical, responsible for its high toxicity to plants.
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Affiliation(s)
- Beatrycze Nowicka
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Kraków, 30-387, Poland.
| | - Jan Walczak
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Kraków, 30-387, Poland
| | - Maja Kapsiak
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Kraków, 30-387, Poland
| | - Karolina Barnaś
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Kraków, 30-387, Poland
| | - Julia Dziuba
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Kraków, 30-387, Poland
| | - Aleksandra Suchoń
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Kraków, 30-387, Poland
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25
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A Review on Forced Degradation Strategies to Establish the Stability of Therapeutic Peptide Formulations. Int J Pept Res Ther 2023. [DOI: 10.1007/s10989-023-10492-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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26
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Hong Z, Li F, Borch T, Shi Q, Fang L. Incorporation of Cu into Goethite Stimulates Oxygen Activation by Surface-Bound Fe(II) for Enhanced As(III) Oxidative Transformation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:2162-2174. [PMID: 36703566 DOI: 10.1021/acs.est.2c07065] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The dark production of reactive oxygen species (ROS) coupled to biogeochemical cycling of iron (Fe) plays a pivotal role in controlling arsenic transformation and detoxification. However, the effect of secondary atom incorporation into Fe(III) oxyhydroxides on this process is poorly understood. Here, we show that the presence of oxygen vacancy (OV) as a result of Cu incorporation in goethite substantially enhances the As(III) oxidation by Fe(II) under oxic conditions. Electrochemical and density functional theory (DFT) evidence reveals that the electron transfer (ET) rate constant is enhanced from 0.023 to 0.197 s-1, improving the electron efficiency of the surface-bound Fe(II) on OV defective surfaces. The cascade charge transfer from the surface-bound Fe(II) to O2 mediated by Fe(III) oxyhydroxides leads to the O-O bond of O2 stretching to 1.46-1.48 Å equivalent to that of superoxide (•O2-), and •O2- is the predominant ROS responsible for As(III) oxidation. Our findings highlight the significant role of atom incorporation in changing the ET process on Fe(III) oxyhydroxides for ROS production. Thus, such an effect must be considered when evaluating Fe mineral reactivity toward changing their surface chemistry, such as those noted here for Cu incorporation, which likely determines the fates of arsenic and other redox sensitive pollutants in the environments with oscillating redox conditions.
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Affiliation(s)
- Zebin Hong
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou510650, China
| | - Fangbai Li
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou510650, China
| | - Thomas Borch
- Department of Soil and Crop Sciences and Department of Chemistry, Colorado State University, 1170 Campus Delivery, Fort Collins, Colorado80523, United States
| | - Qiantao Shi
- Center for Environmental Systems, Stevens Institute of Technology, Hoboken, New Jersey07030, United States
| | - Liping Fang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou510650, China
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27
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Baumann K, Wietzoreck M, Shahpoury P, Filippi A, Hildmann S, Lelieveld S, Berkemeier T, Tong H, Pöschl U, Lammel G. Is the oxidative potential of components of fine particulate matter surface-mediated? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:16749-16755. [PMID: 36550248 PMCID: PMC9908692 DOI: 10.1007/s11356-022-24897-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
Redox-active substances in fine particulate matter (PM) contribute to inhalation health risks through their potential to generate reactive oxygen species in epithelial lung lining fluid (ELF). The ELF's air-liquid interface (ALI) can play an important role in the phase transfer and multi-phase reactions of redox-active PM constituents. We investigated the influence of interfacial processes and properties by scrubbing of coated nano-particles with simulated ELF in a nebulizing mist chamber. Weakly water-soluble redox-active organics abundant in ambient fine PM were reproducibly loaded into ELF via ALI mixing. The resulting oxidative potential (OP) of selected quinones and other PAH derivatives were found to exceed the OP resulting from bulk mixing of the same amounts of redox-active substances and ELF. Our results indicate that the OP of PM components depends not only on the PM substance properties but also on the ELF interface properties and uptake mechanisms. OP measurements based on bulk mixing of phases may not represent the effective OP in the human lung.
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Affiliation(s)
- Karsten Baumann
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
- Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, USA
- Picarro Inc, Santa Clara, USA
| | - Marco Wietzoreck
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Pourya Shahpoury
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
- Air Quality Processes Research Section, Environment and Climate Change Canada, Toronto, Canada
- Chemistry Department, Trent University, Peterborough, Canada
| | - Alexander Filippi
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Stefanie Hildmann
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Steven Lelieveld
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Thomas Berkemeier
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Haijie Tong
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
- Institute of Surface Science, Helmholtz-Zentrum Hereon, Geesthacht, Germany
| | - Ulrich Pöschl
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
| | - Gerhard Lammel
- Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany.
- Research Centre for Toxic Compounds in the Environment, Masaryk University, Brno, Czech Republic.
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Szwalec M, Bujnowicz Ł, Sarewicz M, Osyczka A. Unexpected Heme Redox Potential Values Implicate an Uphill Step in Cytochrome b6f. J Phys Chem B 2022; 126:9771-9780. [PMID: 36399615 PMCID: PMC9720722 DOI: 10.1021/acs.jpcb.2c05729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Cytochromes bc, key enzymes of respiration and photosynthesis, contain a highly conserved two-heme motif supporting cross-membrane electron transport (ET) that connects the two catalytic quinone-binding sites (Qn and Qp). Typically, this ET occurs from the low- to high-potential heme b, but in photosynthetic cytochrome b6f, the redox midpoint potentials (Ems) of these hemes remain uncertain. Our systematic redox titration analysis based on three independent and comprehensive low-temperature spectroscopies (continuous wave and pulse electron paramagnetic resonance (EPR) and optical spectroscopies) allowed for unambiguous assignment of spectral components of hemes in cytochrome b6f and revealed that Em of heme bn is unexpectedly low. Consequently, the cross-membrane ET occurs from the high- to low-potential heme introducing an uphill step in the energy landscape for the catalytic reaction. This slows down the ET through a low-potential chain, which can influence the mechanisms of reactions taking place at both Qp and Qn sites and modulate the efficiency of cyclic and linear ET in photosynthesis.
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Mazzei L, Cianci M, Ciurli S. Inhibition of Urease by Hydroquinones: A Structural and Kinetic Study. Chemistry 2022; 28:e202201770. [PMID: 35994380 PMCID: PMC9826003 DOI: 10.1002/chem.202201770] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Indexed: 01/11/2023]
Abstract
Hydroquinones are a class of organic compounds abundant in nature that result from the full reduction of the corresponding quinones. Quinones are known to efficiently inhibit urease, a NiII -containing enzyme that catalyzes the hydrolysis of urea to yield ammonia and carbonate and acts as a virulence factor of several human pathogens, in addition to decreasing the efficiency of soil organic nitrogen fertilization. Here, we report the molecular characterization of the inhibition of urease from Sporosarcina pasteurii (SPU) and Canavalia ensiformis (jack bean, JBU) by 1,4-hydroquinone (HQ) and its methyl and tert-butyl derivatives. The 1.63-Å resolution X-ray crystal structure of the SPU-HQ complex discloses that HQ covalently binds to the thiol group of αCys322, a key residue located on a mobile protein flap directly involved in the catalytic mechanism. Inhibition kinetic data obtained for the three compounds on JBU reveals the occurrence of an irreversible inactivation process that involves a radical-based autocatalytic mechanism.
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Affiliation(s)
- Luca Mazzei
- Laboratory of Bioinorganic Chemistry Department of Pharmacy and Biotechnology (FaBiT)University of BolognaViale Giuseppe Fanin 4040127BolognaItaly
| | - Michele Cianci
- Department of Agricultural, Food and Environmental SciencesPolytechnic University of MarcheVia Brecce Bianche 1060131AnconaItaly
| | - Stefano Ciurli
- Laboratory of Bioinorganic Chemistry Department of Pharmacy and Biotechnology (FaBiT)University of BolognaViale Giuseppe Fanin 4040127BolognaItaly
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Gao Y, Zhu W, Li J, Liu W, Li X, Zhang J, Huang T. Anthraquinone acted as a catalyst for the removal of triphenylmethane dye containing tertiary amino group: Characteristics and mechanism. J Environ Sci (China) 2022; 121:148-158. [PMID: 35654506 DOI: 10.1016/j.jes.2021.09.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/17/2021] [Accepted: 09/17/2021] [Indexed: 06/15/2023]
Abstract
Herein, we found that anthraquinone (AQ) acted as a catalyst for the rapid and effective removal of triphenylmethane dye containing tertiary amino group (TDAG). Results showed that AQ had an enhanced catalytic reactivity towards the removal of TDAG compared to hydro-quinone, which was further proved and explained using density functional theory (DFT) calculations. AQs could achieve a TDAG removal efficiency and rate of approximately 100% and 0.3583 min-1, respectively, within 20 min. Quenching experiments and electron paramagnetic resonance (EPR) tests indicated that the superoxide radical (O2•-) generated through the catalytic reduction of an oxygen molecule (O2) by AQ contributed to the effective removal of the TDAG. In addition, it was found that the electrophilic attack of the O2•- radical on the TDAG was the driving force for the dye degradation process. Decreasing the pH led to protonation of the substituted group of AG, which resulted in formation of an electron deficient center in the TDAG molecule (TDAG-EDC+) through delocalization of the π electron. Therefore, the possibility of the electrophilic attack for the dye by the negative O2•- radical was significantly enhanced. This study revealed that the H+ and the O2•- generated by the catalytic reduction of O2 have synergistic effects that led to a significant increase in the dye removal rate and efficiency, which were higher than those obtained through persulfate oxidation.
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Affiliation(s)
- Ying Gao
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Weihuang Zhu
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
| | - Junli Li
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Wenqi Liu
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Xue Li
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Jianfeng Zhang
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Tinglin Huang
- Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
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Naphthoquinones Oxidize H 2S to Polysulfides and Thiosulfate, Implications for Therapeutic Applications. Int J Mol Sci 2022; 23:ijms232113293. [PMID: 36362080 PMCID: PMC9657496 DOI: 10.3390/ijms232113293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 10/14/2022] [Accepted: 10/21/2022] [Indexed: 11/06/2022] Open
Abstract
1,4-Napththoquinones (NQs) are clinically relevant therapeutics that affect cell function through production of reactive oxygen species (ROS) and formation of adducts with regulatory protein thiols. Reactive sulfur species (RSS) are chemically and biologically similar to ROS and here we examine RSS production by NQ oxidation of hydrogen sulfide (H2S) using RSS-specific fluorophores, liquid chromatography-mass spectrometry, UV-Vis absorption spectrometry, oxygen-sensitive optodes, thiosulfate-specific nanoparticles, HPLC-monobromobimane derivatization, and ion chromatographic assays. We show that NQs, catalytically oxidize H2S to per- and polysulfides (H2Sn, n = 2−6), thiosulfate, sulfite and sulfate in reactions that consume oxygen and are accelerated by superoxide dismutase (SOD) and inhibited by catalase. The approximate efficacy of NQs (in decreasing order) is, 1,4-NQ ≈ juglone ≈ plumbagin > 2-methoxy-1,4-NQ ≈ menadione >> phylloquinone ≈ anthraquinone ≈ menaquinone ≈ lawsone. We propose that the most probable reactions are an initial two-electron oxidation of H2S to S0 and reduction of NQ to NQH2. S0 may react with H2S or elongate H2Sn in variety of reactions. Reoxidation of NQH2 likely involves a semiquinone radical (NQ·−) intermediate via several mechanisms involving oxygen and comproportionation to produce NQ and superoxide. Dismutation of the latter forms hydrogen peroxide which then further oxidizes RSS to sulfoxides. These findings provide the chemical background for novel sulfur-based approaches to naphthoquinone-directed therapies.
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Volkov AG, Hairston JS, Taengwa G, Roberts J, Liburd L, Patel D. Redox Reactions of Biologically Active Molecules upon Cold Atmospheric Pressure Plasma Treatment of Aqueous Solutions. Molecules 2022; 27:molecules27207051. [PMID: 36296644 PMCID: PMC9608965 DOI: 10.3390/molecules27207051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 10/14/2022] [Accepted: 10/16/2022] [Indexed: 11/30/2022] Open
Abstract
Cold atmospheric pressure plasma (CAPP) is widely used in medicine for the treatment of diseases and disinfection of bio-tissues due to its antibacterial, antiviral, and antifungal properties. In agriculture, CAPP accelerates the imbibition and germination of seeds and significantly increases plant productivity. Plasma is also used to fix molecular nitrogen. CAPP can produce reactive oxygen and nitrogen species (RONS). Plasma treatment of bio-tissue can lead to numerous side effects such as lipid peroxidation, genotoxic problems, and DNA damage. The mechanisms of occurring side effects when treating various organisms with cold plasma are unknown since RONS, UV-Vis light, and multicomponent biological tissues are simultaneously involved in a heterogeneous environment. Here, we found that CAPP can induce in vitro oxidation of the most common water-soluble redox compounds in living cells such as NADH, NADPH, and vitamin C at interfaces between air, CAPP, and water. CAPP is not capable of reducing NAD+ and 1,4-benzoquinone, despite the presence of free electrons in CAPP. Prolonged plasma treatment of aqueous solutions of vitamin C, 1,4-hydroquinone, and 1,4-benzoquinone respectively, leads to their decomposition. Studies of the mechanisms in plasma-induced processes can help to prevent side effects in medicine, agriculture, and food disinfection.
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Affiliation(s)
- Alexander G. Volkov
- Department of Chemistry and Biochemical Sciences, Oakwood University, Adventist Blvd., Huntsville, AL 35896, USA
- Correspondence: ; Tel.: +1-(256)-7267113
| | - Jewel S. Hairston
- Department of Chemistry and Biochemical Sciences, Oakwood University, Adventist Blvd., Huntsville, AL 35896, USA
| | - Gamaliel Taengwa
- Department of Chemistry and Biochemical Sciences, Oakwood University, Adventist Blvd., Huntsville, AL 35896, USA
| | - Jade Roberts
- Department of Chemistry and Biochemical Sciences, Oakwood University, Adventist Blvd., Huntsville, AL 35896, USA
| | - Lincoln Liburd
- Department of Chemistry and Biochemical Sciences, Oakwood University, Adventist Blvd., Huntsville, AL 35896, USA
| | - Darayas Patel
- Department of Mathematics and Computer Science, Oakwood University, Adventist Blvd., Huntsville, AL 35896, USA
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33
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Liu H, Laporte AG, Tardieu D, Hazelard D, Compain P. Formal Glycosylation of Quinones with exo-Glycals Enabled by Iron-Mediated Oxidative Radical-Polar Crossover. J Org Chem 2022; 87:13178-13194. [PMID: 36095170 DOI: 10.1021/acs.joc.2c01635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The intermolecular C-O coupling reaction of 1,4-quinones with exo-glycals under iron hydride hydrogen atom transfer (HAT) conditions is described. This method provides a direct and regioselective access to a wide range of phenolic O-ketosides related to biologically relevant natural products in diastereomeric ratios up to >98:2 in the furanose and pyranose series. No trace of the corresponding C-glycosylated products that might have resulted from the radical alkylation of 1,4-quinones was observed. The results of mechanistic experiments suggest that the key C-O bond-forming event proceeds through an oxidative radical-polar crossover process involving a single-electron transfer between the HAT-generated glycosyl radical and the electron-acceptor quinone.
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Affiliation(s)
- Haijuan Liu
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), Univ. de Strasbourg
- Univ. de Haute-Alsace
- CNRS (UMR 7042), Equipe de Synthèse Organique et Molécules Bioactives (SYBIO), ECPM, 25 Rue Becquerel, 67000 Strasbourg, France
| | - Adrien G Laporte
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), Univ. de Strasbourg
- Univ. de Haute-Alsace
- CNRS (UMR 7042), Equipe de Synthèse Organique et Molécules Bioactives (SYBIO), ECPM, 25 Rue Becquerel, 67000 Strasbourg, France
| | - Damien Tardieu
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), Univ. de Strasbourg
- Univ. de Haute-Alsace
- CNRS (UMR 7042), Equipe de Synthèse Organique et Molécules Bioactives (SYBIO), ECPM, 25 Rue Becquerel, 67000 Strasbourg, France
| | - Damien Hazelard
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), Univ. de Strasbourg
- Univ. de Haute-Alsace
- CNRS (UMR 7042), Equipe de Synthèse Organique et Molécules Bioactives (SYBIO), ECPM, 25 Rue Becquerel, 67000 Strasbourg, France
| | - Philippe Compain
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), Univ. de Strasbourg
- Univ. de Haute-Alsace
- CNRS (UMR 7042), Equipe de Synthèse Organique et Molécules Bioactives (SYBIO), ECPM, 25 Rue Becquerel, 67000 Strasbourg, France
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Yu C, Lu Y, Zhang Y, Qian A, Zhang P, Tong M, Yuan S. Significant Contribution of Solid Organic Matter for Hydroxyl Radical Production during Oxygenation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:11878-11887. [PMID: 35938447 DOI: 10.1021/acs.est.2c02766] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Dark formation of hydroxyl radicals (•OH) from soil/sediment oxygenation has been increasingly reported, and solid Fe(II) is considered as the main electron donor for O2 activation. However, the role of solid organic matter (SOM) in •OH production is not clear, although it represents an important electron pool in the subsurface. In this study, •OH production from oxygenation of reduced solid humic acid (HAred) was investigated at pH 7.0. •OH production is linearly correlated with the electrons released from HAred suspension. Solid HAred transferred electrons rapidly to O2 via the surface-reduced moieties (hydroquinone groups), which was fueled by the slow electron transfer from the reduced moieties inside solid HA. Cycling of dissolved HA between oxidized and reduced states could mediate the electron transfer from solid HAred to O2 for •OH production enhancement. Modeling results predicted that reduced SOM played an important or even dominant role in •OH production for the soils and sediments possessing high molar ratios of SOC/Fe(II) (e.g., >39). The significant contribution of SOM was further validated by the modeling results for oxygenation of 88 soils/sediments in the literature. Therefore, reduced SOM should be considered carefully to comprehensively understand •OH production in SOM-rich subsurface environments.
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Affiliation(s)
- Chenglong Yu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Yuxi Lu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Yanting Zhang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Ao Qian
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Peng Zhang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Man Tong
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
| | - Songhu Yuan
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P. R. China
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan 430078, P.R. China
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35
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Yang Y, Rao X, Fu Q, Zhang X, Gao J, Wan X, Zhu J, Huang G, Hu H. The inhibiting effects of organic acids on arsenic immobilization by ferrihydrite: Gallic acid as an example. CHEMOSPHERE 2022; 299:134286. [PMID: 35304216 DOI: 10.1016/j.chemosphere.2022.134286] [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: 11/03/2021] [Revised: 03/03/2022] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
Organic acids usually compete the immobilization of As by iron (hydro)oxides, but their oxidizing effects are ignored. Therefore, the gallic acid (GA) with strong redox activity was chosen to investigate the influence of arsenite [As(III)] oxidation on As immobilization by ferrihydrite. Our results found that the As amount adsorbed on ferrihydrite decreased with the pH rising from 5 to 9 in the presence of GA, and the adsorption amount (28.8 g kg-1) at pH 9 was 45.1% lower than that in the absence of GA. Meanwhile, the As adsorption amounts in treatments of GA addition before As (Fh-GA-As(III)) were significantly lower than that in their corresponding simultaneous addition (Fh-As(III)/GA). The proportions of As(V)/Astotal on ferrihydrite and in equilibrium suspension were increased as the pH increased in the presence of GA, and the highest oxidation efficiency of As(III) by GA at pH 9 was 90.3%, which was mainly due to the contribution of hydrogen peroxide (H2O2, 52.6%) and semiquinone radicals (SQ-, 27.1%). In general, the oxidation and competition adsorption of As by GA inhibited the As immobilization by ferrihydrite, and the oxidation of As(III) by GA was strongly dependent on pH, while H2O2 and SQ- were demonstrated as the main oxidant at pH 9.
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Affiliation(s)
- Yongqiang Yang
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China
| | - Xiongfei Rao
- Tobacco Research Institute of Hubei Province, Wuhan, 430030, China
| | - Qingling Fu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China.
| | - Xin Zhang
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China
| | - Jieyu Gao
- Hubei Geological Survey, Wuhan, 430000, China
| | - Xiang Wan
- Hubei Geological Survey, Wuhan, 430000, China
| | - Jun Zhu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China
| | - Guoyong Huang
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou, 510006, China
| | - Hongqing Hu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China
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Nassi A, Sop SDK, Leuna JBM, Makota S, Pengou M, Ngameni E. Electrochemical reactivity of thin film of plumbagin at ionic liquid | water interface. MONATSHEFTE FUR CHEMIE 2022. [DOI: 10.1007/s00706-022-02940-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nothling MD, Bailey CG, Fillbrook LL, Wang G, Gao Y, McCamey DR, Monfared M, Wong S, Beves JE, Stenzel MH. Polymer Grafting to Polydopamine Free Radicals for Universal Surface Functionalization. J Am Chem Soc 2022; 144:6992-7000. [PMID: 35404602 DOI: 10.1021/jacs.2c02073] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Modifying surfaces using free radical polymerization (FRP) offers a means to incorporate the diverse physicochemical properties of vinyl polymers onto new materials. Here, we harness the universal surface attachment of polydopamine (PDA) to "prime" a range of different surfaces for free radical polymer attachment, including glass, cotton, paper, sponge, and stainless steel. We show that the intrinsic free radical species present in PDA can serve as an anchor point for subsequent attachment of propagating vinyl polymer macroradicals through radical-radical coupling. Leveraging a straightforward, twofold soak-wash protocol, FRP over the PDA-functionalized surfaces results in covalent polymer attachment on both porous and nonporous substrates, imparting new properties to the functionalized materials, including enhanced hydrophobicity, fluorescence, or temperature responsiveness. Our strategy is then extended to covalently incorporate PDA nanoparticles into organo-/hydrogels via radical cross-linking, yielding tunable PDA-polymer composite networks. The propensity of PDA free radicals to quench FRP is studied using in situ 1H nuclear magnetic resonance and electron paramagnetic resonance spectroscopy, revealing a surface area-dependent macroradical scavenging mechanism that underpins PDA-polymer conjugation. By combining the arbitrary surface attachment of PDA with the broad physicochemical properties of vinyl polymers, our strategy provides a straightforward route for imparting unlimited new functionality to practically any surface.
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Affiliation(s)
- Mitchell D Nothling
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Christopher G Bailey
- ARC Centre of Excellence in Exciton Science, School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Lucy L Fillbrook
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Guannan Wang
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Yijie Gao
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Dane R McCamey
- ARC Centre of Excellence in Exciton Science, School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Marzieh Monfared
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Sandy Wong
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Jonathon E Beves
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Martina H Stenzel
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
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Pallu J, Rabin C, Hui P, Moreira TS, Creste G, Calvet C, Limoges B, Mavré F, Branca M. Exponential amplification by redox cross-catalysis and unmasking of doubly protected molecular probes. Chem Sci 2022; 13:2764-2777. [PMID: 35356676 PMCID: PMC8890127 DOI: 10.1039/d1sc06086d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 02/10/2022] [Indexed: 11/21/2022] Open
Abstract
The strength of autocatalytic reactions lies in their ability to provide a powerful means of molecular amplification, which can be very useful for improving the analytical performances of a multitude of analytical and bioanalytical methods. However, one of the major difficulties in designing an efficient autocatalytic amplification system is the requirement for reactants that are both highly reactive and chemically stable in order to avoid limitations imposed by undesirable background amplifications. In the present work, we devised a reaction network based on a redox cross-catalysis principle, in which two catalytic loops activate each other. The first loop, catalyzed by H2O2, involves the oxidative deprotection of a naphthylboronate ester probe into a redox-active naphthohydroquinone, which in turn catalyzes the production of H2O2 by redox cycling in the presence of a reducing enzyme/substrate couple. We present here a set of new molecular probes with improved reactivity and stability, resulting in particularly steep sigmoidal kinetic traces and enhanced discrimination between specific and nonspecific responses. This translates into the sensitive detection of H2O2 down to a few nM in less than 10 minutes or a redox cycling compound such as the 2-amino-3-chloro-1,4-naphthoquinone down to 50 pM in less than 30 minutes. The critical reason leading to these remarkably good performances is the extended stability stemming from the double masking of the naphthohydroquinone core by two boronate groups, a counterintuitive strategy if we consider the need for two equivalents of H2O2 for full deprotection. An in-depth study of the mechanism and dynamics of this complex reaction network is conducted in order to better understand, predict and optimize its functioning. From this investigation, the time response as well as detection limit are found to be highly dependent on pH, nature of the buffer, and concentration of the reducing enzyme. Reduction of the non-specific background in autocatalytic molecular amplifications by a double masking strategy.![]()
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Affiliation(s)
- Justine Pallu
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, UMR 7591, CNRS F-75013 Paris France
| | - Charlie Rabin
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, UMR 7591, CNRS F-75013 Paris France
| | - Pan Hui
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, UMR 7591, CNRS F-75013 Paris France
| | - Thamires S Moreira
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, UMR 7591, CNRS F-75013 Paris France
| | - Geordie Creste
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, UMR 7591, CNRS F-75013 Paris France
| | - Corentin Calvet
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, UMR 7591, CNRS F-75013 Paris France
| | - Benoît Limoges
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, UMR 7591, CNRS F-75013 Paris France
| | - François Mavré
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, UMR 7591, CNRS F-75013 Paris France
| | - Mathieu Branca
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, UMR 7591, CNRS F-75013 Paris France
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Olson KR, Clear KJ, Derry PJ, Gao Y, Ma Z, Wu G, Kent TA, Straub KD. Coenzyme Q 10 and related quinones oxidize H 2S to polysulfides and thiosulfate. Free Radic Biol Med 2022; 182:119-131. [PMID: 35202787 DOI: 10.1016/j.freeradbiomed.2022.02.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 02/03/2022] [Accepted: 02/18/2022] [Indexed: 12/11/2022]
Abstract
In the canonical pathway for mitochondrial H2S oxidation electrons are transferred from sulfide:quinone oxidoreductase (SQR) to complex III via ubiquinone (CoQ10). We previously observed that a number of quinones directly oxidize H2S and we hypothesize that CoQ10 may have similar properties. Here we examine H2S oxidation by CoQ10 and more hydrophilic, truncated forms, CoQ1 and CoQ0, in buffer using H2S and polysulfide fluorophores (AzMC and SSP4), silver nanoparticles to measure thiosulfate (H2S2O3), mass spectrometry to identify polysulfides and O2-sensitive optodes to measure O2 consumption. We show that all three quinones concentration-dependently catalyze the oxidization of H2S to polysulfides and thiosulfate in buffer with the potency CoQ0>CoQ1>CoQ10 and that CoQ0 specifically oxidizes H2S to per-polysulfides, H2S2,3,4. These reactions consume and require oxygen and are augmented by addition of SOD suggesting that the quinones, not superoxide, oxidize H2S. Related quinones, MitoQ, menadione and idebenone, oxidize H2S in similar reactions. Exogenous CoQ0 decreases cellular H2S and increases polysulfides and thiosulfate production and this is also O2-dependent, suggesting that the quinone has similar effects on sulfur metabolism in cells. Collectively, these results suggest an additional endogenous mechanism for H2S metabolism and a potential therapeutic approach in H2S-related metabolic disorders.
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Affiliation(s)
- Kenneth R Olson
- Indiana University School of Medicine - South Bend Center, South Bend, IN, 46617, USA; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA.
| | - Kasey J Clear
- Department of Chemistry and Biochemistry, Indiana University South Bend, South Bend, IN, 46615, USA
| | - Paul J Derry
- Department of Internal Medicine, University of Texas - McGovern Medical School at Houston, Houston, TX, 77030, USA
| | - Yan Gao
- Indiana University School of Medicine - South Bend Center, South Bend, IN, 46617, USA
| | - Zhilin Ma
- Indiana University School of Medicine - South Bend Center, South Bend, IN, 46617, USA; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Gang Wu
- Department of Internal Medicine, University of Texas - McGovern Medical School at Houston, Houston, TX, 77030, USA
| | - Thomas A Kent
- Center for Genomics and Precision Medicine, Institute of Biosciences and Technology, Texas A&M Health Science Center, Houston, TX, 77030, USA; Department of Chemistry, Rice University, Houston, TX, 77005, United States; Stanley H. Appel Department of Neurology, Houston Methodist Hospital and Research Institute, 6560 Fannin Street, Houston, TX, 77030, United States
| | - Karl D Straub
- Central Arkansas Veteran's Healthcare System, Little Rock, AR, 72205, USA; Departments of Medicine and Biochemistry, University of Arkansas for Medical Sciences, Little Rock, AR, 72202, USA
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Gueskine V, Vagin M, Berggren M, Crispin X, Zozoulenko I. Oxygen reduction reaction at conducting polymer electrodes in a wider context: Insights from modelling concerning outer and inner sphere mechanisms. ELECTROCHEMICAL SCIENCE ADVANCES 2022. [DOI: 10.1002/elsa.202100191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Viktor Gueskine
- Laboratory of Organic Electronics Department of Science and Technology Linköping University Norrköping 601 74 Sweden
| | - Mikhail Vagin
- Laboratory of Organic Electronics Department of Science and Technology Linköping University Norrköping 601 74 Sweden
| | - Magnus Berggren
- Laboratory of Organic Electronics Department of Science and Technology Linköping University Norrköping 601 74 Sweden
| | - Xavier Crispin
- Laboratory of Organic Electronics Department of Science and Technology Linköping University Norrköping 601 74 Sweden
| | - Igor Zozoulenko
- Laboratory of Organic Electronics Department of Science and Technology Linköping University Norrköping 601 74 Sweden
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41
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An electrochemical strategy for synthesising carbon-based nanomaterials with tuned redox properties. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Asha A, Suma S. Synthesis, electrochemical and anti-microbial study of 2,5-diamino benzoquinones. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2021.100316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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43
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Yin X, Chen K, Cheng H, Chen X, Feng S, Song Y, Liang L. Chemical Stability of Ascorbic Acid Integrated into Commercial Products: A Review on Bioactivity and Delivery Technology. Antioxidants (Basel) 2022; 11:153. [PMID: 35052657 PMCID: PMC8773188 DOI: 10.3390/antiox11010153] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/10/2022] [Accepted: 01/12/2022] [Indexed: 01/27/2023] Open
Abstract
The L-enantiomer of ascorbic acid is commonly known as vitamin C. It is an indispensable nutrient and plays a key role in retaining the physiological process of humans and animals. L-gulonolactone oxidase, the key enzyme for the de novo synthesis of ascorbic acid, is lacking in some mammals including humans. The functionality of ascorbic acid has prompted the development of foods fortified with this vitamin. As a natural antioxidant, it is expected to protect the sensory and nutritional characteristics of the food. It is thus important to know the degradation of ascorbic acid in the food matrix and its interaction with coexisting components. The biggest challenge in the utilization of ascorbic acid is maintaining its stability and improving its delivery to the active site. The review also includes the current strategies for stabilizing ascorbic acid and the commercial applications of ascorbic acid.
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Affiliation(s)
- Xin Yin
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (X.Y.); (K.C.); (H.C.); (X.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Kaiwen Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (X.Y.); (K.C.); (H.C.); (X.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Hao Cheng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (X.Y.); (K.C.); (H.C.); (X.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Xing Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (X.Y.); (K.C.); (H.C.); (X.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Shuai Feng
- Luwei Pharmaceutical Group Co., Ltd., Shuangfeng Industrial Park, Zibo 255195, China;
| | - Yuanda Song
- Colin Raledge Center for Microbial Lipids, School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China;
| | - Li Liang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (X.Y.); (K.C.); (H.C.); (X.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
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Nandhakumar P, Lee W, Nam S, Bhatia A, Seo J, Kim G, Lee N, Yoon YH, Joo JM, Yang H. Di(Thioether Sulfonate)-Substituted Quinolinedione as a Rapidly Dissoluble and Stable Electron Mediator and Its Application in Sensitive Biosensors. Adv Healthc Mater 2022; 11:e2101819. [PMID: 34706164 DOI: 10.1002/adhm.202101819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/21/2021] [Indexed: 11/06/2022]
Abstract
The commonly required properties of diffusive electron mediators for point-of-care testing are rapid dissolubility, high stability, and moderate formal potential in aqueous solutions. Inspired by nature, various quinone-containing electron mediators have been developed; however, satisfying all these requirements remains a challenge. Herein, a strategic design toward quinones incorporating sulfonated thioether and nitrogen-containing heteroarene moieties as solubilizing, stabilizing, and formal potential-modulating groups is reported. A systematic investigation reveals that di(thioether sulfonate)-substituted quinoline-1,4-dione (QLS) and quinoxaline-1,4-dione (QXS) display water solubilities of ≈1 m and are rapidly dissoluble. By finely balancing the electron-donating effect of the thioethers and the electron-withdrawing effect of the nitrogen atom, formal potentials suitable for electrochemical biosensors are achieved with QLS and QXS (-0.15 and -0.09 V vs Ag/AgCl, respectively, at pH 7.4). QLS is stable for >1 d in PBS (pH 7.4) and for 1 h in tris buffer (pH 9.0), which is sufficient for point-of-care testing. Furthermore, QLS, with its high electron mediation ability, is successfully used in biosensors for sensitive detection of glucose and parathyroid hormone, demonstrating detection limits of ≈0.3 × 10-3 m and ≈2 pg mL-1 , respectively. This strategy produces organic electron mediators exhibiting rapid dissolution and high stability, and will find broad application beyond quinone-based biosensors.
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Affiliation(s)
- Ponnusamy Nandhakumar
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Korea
| | - Woohyeong Lee
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Korea
| | - Sangwook Nam
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Korea
| | - Aman Bhatia
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Korea
| | - Jia Seo
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Korea
| | - Gyeongho Kim
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Korea
| | | | | | - Jung Min Joo
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Korea
| | - Haesik Yang
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Korea
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45
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Voronin MV, Kadnikov IA, Zainullina LF, Logvinov IO, Verbovaya ER, Antipova TA, Vakhitova YV, Seredenin SB. Neuroprotective Properties of Quinone Reductase 2 Inhibitor M-11, a 2-Mercaptobenzimidazole Derivative. Int J Mol Sci 2021; 22:13061. [PMID: 34884863 PMCID: PMC8658107 DOI: 10.3390/ijms222313061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 11/29/2021] [Accepted: 11/29/2021] [Indexed: 01/03/2023] Open
Abstract
The ability of NQO2 to increase the production of free radicals under enhanced generation of quinone derivatives of catecholamines is considered to be a component of neurodegenerative disease pathogenesis. The present study aimed to investigate the neuroprotective mechanisms of original NQO2 inhibitor M-11 (2-[2-(3-oxomorpholin-4-il)-ethylthio]-5-ethoxybenzimidazole hydrochloride) in a cellular damage model using NQO2 endogenous substrate adrenochrome (125 µM) and co-substrate BNAH (100 µM). The effects of M-11 (10-100 µM) on the reactive oxygen species (ROS) generation, apoptosis and lesion of nuclear DNA were evaluated using flow cytometry and single-cell gel electrophoresis assay (comet assay). Results were compared with S29434, the reference inhibitor of NQO2. It was found that treatment of HT-22 cells with M-11 results in a decline of ROS production triggered by incubation of cells with NQO2 substrate and co-substrate. Pre-incubation of HT-22 cells with compounds M-11 or S29434 results in a decrease of DNA damage and late apoptotic cell percentage reduction. The obtained results provide a rationale for further development of the M-11 compound as a potential neuroprotective agent.
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Affiliation(s)
- Mikhail V. Voronin
- Department of Pharmacogenetics, Federal State Budgetary Institution “Research Zakusov Institute of Pharmacology”, Baltiyskaya Street 8, 125315 Moscow, Russia; (L.F.Z.); (I.O.L.); (E.R.V.); (T.A.A.)
| | - Ilya A. Kadnikov
- Department of Pharmacogenetics, Federal State Budgetary Institution “Research Zakusov Institute of Pharmacology”, Baltiyskaya Street 8, 125315 Moscow, Russia; (L.F.Z.); (I.O.L.); (E.R.V.); (T.A.A.)
| | | | | | | | | | - Yulia V. Vakhitova
- Department of Pharmacogenetics, Federal State Budgetary Institution “Research Zakusov Institute of Pharmacology”, Baltiyskaya Street 8, 125315 Moscow, Russia; (L.F.Z.); (I.O.L.); (E.R.V.); (T.A.A.)
| | - Sergei B. Seredenin
- Department of Pharmacogenetics, Federal State Budgetary Institution “Research Zakusov Institute of Pharmacology”, Baltiyskaya Street 8, 125315 Moscow, Russia; (L.F.Z.); (I.O.L.); (E.R.V.); (T.A.A.)
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46
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Terenzi A, La Franca M, van Schoonhoven S, Panchuk R, Martínez Á, Heffeter P, Gober R, Pirker C, Vician P, Kowol CR, Stoika R, Salassa L, Rohr J, Berger W. Landomycins as glutathione-depleting agents and natural fluorescent probes for cellular Michael adduct-dependent quinone metabolism. Commun Chem 2021; 4:162. [PMID: 36697631 PMCID: PMC9814637 DOI: 10.1038/s42004-021-00600-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 11/03/2021] [Indexed: 01/28/2023] Open
Abstract
Landomycins are angucyclines with promising antineoplastic activity produced by Streptomyces bacteria. The aglycone landomycinone is the distinctive core, while the oligosaccharide chain differs within derivatives. Herein, we report that landomycins spontaneously form Michael adducts with biothiols, including reduced cysteine and glutathione, both cell-free or intracellularly involving the benz[a]anthraquinone moiety of landomycinone. While landomycins generally do not display emissive properties, the respective Michael adducts exerted intense blue fluorescence in a glycosidic chain-dependent manner. This allowed label-free tracking of the short-lived nature of the mono-SH-adduct followed by oxygen-dependent evolution with addition of another SH-group. Accordingly, hypoxia distinctly stabilized the fluorescent mono-adduct. While extracellular adduct formation completely blocked the cytotoxic activity of landomycins, intracellularly it led to massively decreased reduced glutathione levels. Accordingly, landomycin E strongly synergized with glutathione-depleting agents like menadione but exerted reduced activity under hypoxia. Summarizing, landomycins represent natural glutathione-depleting agents and fluorescence probes for intracellular anthraquinone-based angucycline metabolism.
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Affiliation(s)
- Alessio Terenzi
- grid.10776.370000 0004 1762 5517Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, University of Palermo, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy
| | - Mery La Franca
- grid.10776.370000 0004 1762 5517Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, University of Palermo, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy ,grid.22937.3d0000 0000 9259 8492Institute of Cancer Research and Comprehensive Cancer Center, Medical University Vienna, Spitalgasse 23, 1090 Vienna, Austria
| | - Sushilla van Schoonhoven
- grid.22937.3d0000 0000 9259 8492Institute of Cancer Research and Comprehensive Cancer Center, Medical University Vienna, Spitalgasse 23, 1090 Vienna, Austria
| | - Rostyslav Panchuk
- grid.466769.cDepartment of Regulation of Cell Proliferation and Apoptosis, Institute of Cell Biology, Drahomanov St., 14/16, Lviv, 79005 Ukraine
| | - Álvaro Martínez
- grid.452382.a0000 0004 1768 3100Donostia International Physics Center and Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 4, Donostia, 20018 Spain
| | - Petra Heffeter
- grid.22937.3d0000 0000 9259 8492Institute of Cancer Research and Comprehensive Cancer Center, Medical University Vienna, Spitalgasse 23, 1090 Vienna, Austria ,grid.22937.3d0000 0000 9259 8492Research Cluster “Translational Cancer Therapy Research”, University of Vienna and Medical University of Vienna, Vienna, Austria
| | - Redding Gober
- grid.266539.d0000 0004 1936 8438College of Pharmacy, University of Kentucky, South Limestone Str. 789, Lexington, 40536-0596 USA
| | - Christine Pirker
- grid.22937.3d0000 0000 9259 8492Institute of Cancer Research and Comprehensive Cancer Center, Medical University Vienna, Spitalgasse 23, 1090 Vienna, Austria
| | - Petra Vician
- grid.22937.3d0000 0000 9259 8492Institute of Cancer Research and Comprehensive Cancer Center, Medical University Vienna, Spitalgasse 23, 1090 Vienna, Austria
| | - Christian R. Kowol
- grid.22937.3d0000 0000 9259 8492Research Cluster “Translational Cancer Therapy Research”, University of Vienna and Medical University of Vienna, Vienna, Austria ,grid.10420.370000 0001 2286 1424Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Straße 42, 1090 Vienna, Austria
| | - Rostyslav Stoika
- grid.466769.cDepartment of Regulation of Cell Proliferation and Apoptosis, Institute of Cell Biology, Drahomanov St., 14/16, Lviv, 79005 Ukraine
| | - Luca Salassa
- grid.452382.a0000 0004 1768 3100Donostia International Physics Center and Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 4, Donostia, 20018 Spain ,grid.424810.b0000 0004 0467 2314Ikerbasque, Basque Foundation for Science, Bilbao, 48011 Spain
| | - Jürgen Rohr
- grid.266539.d0000 0004 1936 8438College of Pharmacy, University of Kentucky, South Limestone Str. 789, Lexington, 40536-0596 USA
| | - Walter Berger
- Institute of Cancer Research and Comprehensive Cancer Center, Medical University Vienna, Spitalgasse 23, 1090, Vienna, Austria. .,Research Cluster "Translational Cancer Therapy Research", University of Vienna and Medical University of Vienna, Vienna, Austria.
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Commensal-Related Changes in the Epidermal Barrier Function Lead to Alterations in the Benzo[ a]Pyrene Metabolite Profile and Its Distribution in 3D Skin. mBio 2021; 12:e0122321. [PMID: 34579573 PMCID: PMC8546866 DOI: 10.1128/mbio.01223-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Polycyclic aromatic hydrocarbons (PAH) such as benzo[a]pyrene (B[a]P) are among the most abundant environmental pollutants, resulting in continuous exposure of human skin and its microbiota. However, effects of the latter on B[a]P toxicity, absorption, metabolism, and distribution in humans remain unclear. Here, we demonstrate that the skin microbiota does metabolize B[a]P on and in human skin in situ, using a recently developed commensal skin model. In this model, microbial metabolism leads to high concentrations of known microbial B[a]P metabolites on the surface as well as in the epidermal layers. In contrast to what was observed for uncolonized skin, B[a]P and its metabolites were subject to altered rates of skin penetration and diffusion, resulting in up to 58% reduction of metabolites recovered from basal culture medium. The results indicate the reason for this altered behavior to be a microbially induced strengthening of the epidermal barrier. Concomitantly, colonized models showed decreased formation and penetration of the ultimate carcinogen B[a]P-7,8-dihydrodiol-9,10-epoxide (BPDE), leading, in consequence, to fewer BPDE-DNA adducts being formed. Befittingly, transcript and expression levels of key proteins for repairing environmentally induced DNA damage such as xeroderma pigmentosum complementation group C (XPC) were also found to be reduced in the commensal models, as was expression of B[a]P-associated cytochrome P450-dependent monooxygenases (CYPs). The results show that the microbiome can have significant effects on the toxicology of external chemical impacts. The respective effects rely on a complex interplay between microbial and host metabolism and microbe-host interactions, all of which cannot be adequately assessed using single-system studies.
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Xu L, Wang Y, Song E, Song Y. Nucleophilic and redox properties of polybrominated diphenyl ether derived-quinone/hydroquinone metabolites are responsible for their neurotoxicity. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126697. [PMID: 34329100 DOI: 10.1016/j.jhazmat.2021.126697] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/06/2021] [Accepted: 07/18/2021] [Indexed: 06/13/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) are a category of brominated flame retardants, which were widely used in industrial products since the 1970 s. Our previous studies indicated quinone-type metabolites of PBDEs (PBDE-Qs) cause neurotoxicity, however, their inherent toxicological mechanism remains unclear. Here, we first synthesized PBDE-Qs and corresponding reduced hydroquinone homologous (PBDE-HQs) with different pattern of bromine substitution. Their nucleophilic and redox properties were investigated. PBDE-Qs react with reduced glutathione (GSH) via Michael addition and bromine displacement reaction, whilst PBDE-HQs lack the ability of reacting with GSH. Of note, the displacement reaction only occurs with bromine on the quinone ring of PBDE-Qs but not phenyl ring. Next, electron paramagnetic resonance (EPR) analysis revealed the generation of SQ•-, along with their downstream hydroxyl radical (HO•) and methyl radical (•CH3) through a PBDE quinone/semiquinone/hydroquinone (Q/SQ•-/HQ) futile cycle. In addition, a structure-dependent cytotoxicity pattern was found, the exposure of PBDE-Q/HQ with bromine substitution on the quinone ring resulted in higher level of apoptosis and autophagy in BV2 cells. In conclusion, this work clearly demonstrated that the nucleophilic and redox properties of PBDE-Qs/HQs are responsible for their neurotoxicity, and this finding provide better understanding of neurotoxicity of PBDEs.
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Affiliation(s)
- Lei Xu
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, 2 Tiansheng Rd, Beibei District, Chongqing 400715, China
| | - Yuting Wang
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, 2 Tiansheng Rd, Beibei District, Chongqing 400715, China
| | - Erqun Song
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, 2 Tiansheng Rd, Beibei District, Chongqing 400715, China
| | - Yang Song
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, 2 Tiansheng Rd, Beibei District, Chongqing 400715, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Rd, Haidian District, Beijing 100085, China.
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49
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An Experimental and Theoretical Study of Dye Properties of Thiophenyl Derivatives of 2-Hydroxy-1,4-naphthoquinone (Lawsone). MATERIALS 2021; 14:ma14195587. [PMID: 34639987 PMCID: PMC8509387 DOI: 10.3390/ma14195587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/21/2021] [Accepted: 09/23/2021] [Indexed: 11/16/2022]
Abstract
A prospective study of the dye properties of non-toxic lawsone thiophenyl derivatives, obtained using a green synthetic methodology allowed for the description of their bathochromic shifts in comparison to those of lawsone, a well-known natural pigment used as a colorant that recently also has aroused interest in dye-sensitized solar cells (DSSCs). These compounds exhibited colors close to red, with absorption bands in visible and UV wavelength range. The colorimetric study showed that these compounds exhibited a darker color than that of lawsone within a range of colors depending on the substituent in the phenyl ring. Computational calculations employing Density Functional Theory (DFT) and Time-Dependent Density Functional Theory (TD-DFT), showed that the derivatives have lower excitation energies than lawsone, while the alignment of their frontier orbitals regarding the conduction bands of TiO2 and ZnO and the redox potential of the electrolyte I-/I3- suggests that they could be employed as sensitizers. The study of the interactions of the lawsone and a derivative with a TiO2 surface model by different anchoring modes, showed that the adsorption is thermodynamically favored. Natural bond orbital (NBO) analysis indicates a two-center bonding (BD) O-Ti as the main interaction of the dyes with TiO2.
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50
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Tentscher PR, Escher BI, Schlichting R, König M, Bramaz N, Schirmer K, von Gunten U. Toxic effects of substituted p-benzoquinones and hydroquinones in in vitro bioassays are altered by reactions with the cell assay medium. WATER RESEARCH 2021; 202:117415. [PMID: 34348209 DOI: 10.1016/j.watres.2021.117415] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/19/2021] [Accepted: 07/02/2021] [Indexed: 06/13/2023]
Abstract
Substituted para-benzoquinones and hydroquinones are ubiquitous transformation products that arise during oxidative water treatment of phenolic precursors, for example through ozonation or chlorination. The benzoquinone structural motive is associated with mutagenicity and carcinogenicity, and also with induction of the oxidative stress response through the Nrf2 pathway. For either endpoint, toxicological data for differently substituted compounds are scarce. In this study, oxidative stress response, as indicated by the AREc32 in vitro bioassay, was induced by differently substituted para-benzoquinones, but also by the corresponding hydroquinones. Bioassays that indicate defense against genotoxicity (p53RE-bla) and DNA repair activity (UmuC) were not activated by these compounds. Stability tests conducted under incubation conditions, but in the absence of cell lines, showed that tested para-benzoquinones reacted rapidly with constituents of the incubation medium. Compounds were abated already in phosphate buffer, but even faster in biological media, with reactions attributed to amino- and thiol-groups of peptides, proteins, and free amino acids. The products of these reactions were often the corresponding substituted hydroquinones. Conversely, differently substituted hydroquinones were quantitatively oxidized to p-benzoquinones over the course of the incubation. The observed induction of the oxidative stress response was attributed to hydroquinones that are presumably oxidized to benzoquinones inside the cells. Despite the instability of the tested compounds in the incubation medium, the AREc32 in vitro bioassay could be used as an unspecific sum parameter to detect para-benzoquinones and hydroquinones in oxidatively treated waters.
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Affiliation(s)
- Peter R Tentscher
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Duebendorf CH-8600, Switzerland; Department of Chemistry and Bioscience, Aalborg University, Aalborg 9220, Denmark
| | - Beate I Escher
- Department of Cell Toxicology, UFZ - Helmholtz Centre for Environmental Research, Leipzig 04318, Germany; Center for Applied Geoscience, Eberhard Karls University of Tübingen, Schnarrenbergstr. 94-96, Tübingen 72076, Germany
| | - Rita Schlichting
- Department of Cell Toxicology, UFZ - Helmholtz Centre for Environmental Research, Leipzig 04318, Germany
| | - Maria König
- Department of Cell Toxicology, UFZ - Helmholtz Centre for Environmental Research, Leipzig 04318, Germany
| | - Nadine Bramaz
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Duebendorf CH-8600, Switzerland
| | - Kristin Schirmer
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Duebendorf CH-8600, Switzerland; Department of Environmental Systems Science, ETH Zürich, Zürich CH-8092, Switzerland; Civil and Environmental Engineering (ENAC), School of Architecture, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH-1015, Switzerland
| | - Urs von Gunten
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Duebendorf CH-8600, Switzerland; Civil and Environmental Engineering (ENAC), School of Architecture, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH-1015, Switzerland.
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