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Sasaki Y, Zhang Y, Ohshiro K, Tsuchiya K, Lyu X, Kamiko M, Ueno Y, Tanaka H, Minami T. An organic transistor for detecting the oxidation of an organic sulfur compound at a solid-liquid interface and its chemical sensing applications. Faraday Discuss 2024; 250:60-73. [PMID: 37975288 DOI: 10.1039/d3fd00149k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
The development of chemical sensors has advanced due to an increase in demand; however, the potential of chemical sensors as devices to monitor organic reactions has not been revealed yet. Thus, we aim to propose a chemical sensor platform for facile monitoring of chemical reactions, especially at a solid-liquid interface. In this study, an extended-gate-type organic field-effect transistor (OFET) has been employed as a platform to detect chemical reactions at an interface between the extended-gate electrode and an aqueous solution. The OFET device functionalized with 4,4'-thiobisbenzenthiol has shown time- and concentration-dependent shifts in transistor characteristics upon adding H2O2. In a selectivity test using seven oxidant agents, the transistor responses depended on the oxidation of the organic sulfur compound (i.e., 4,4'-thiobisbenzenthiol) stemming from the ability of the oxidant agents. Therefore, the observed changes in the transistor characteristics have suggested the generation of sulfur-oxidized products at the interface. In this regard, the observed responses were caused by disulfide formation accompanied by changes in the charges under neutral pH conditions. Meanwhile, weak transistor responses derived from the generation of oxygen adducts have also been observed, which were caused by changes in the dipole moments. Indeed, the yields of the oxygen adducts have been revealed by X-ray photoelectron spectroscopy. The monitoring of gradual changes originating from the decrease in the disulfide formation and the increase in the oxygen adducts implied a novel aspect of the OFET device as a platform to simultaneously detect reversible and irreversible reactions at interfaces without using large-sized analytical instruments. Sulfur oxidation by H2O2 on the OFET device has been further applied to the indirect monitoring of an enzymatic reaction in solution. The OFET-based chemical sensor has shown continuous changes with an increase in a substance (i.e., lactate) in the presence of an enzyme (i.e., lactate oxidase), which indicates that the OFET response depends on the H2O2 generated through the enzymatic reaction in the solution. In this study, we have clarified the versatility of organic devices as platforms to monitor different chemical reactions using a single detection method.
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Affiliation(s)
- Yui Sasaki
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
- JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan
| | - Yijing Zhang
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Kohei Ohshiro
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Kazuhiko Tsuchiya
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Xiaojun Lyu
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Masao Kamiko
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Yoshinori Ueno
- Corporate Research Center, Toyobo Co., Ltd, 2-1-1 Katata, Otsu, Shiga, 520-0292, Japan
| | - Hikaru Tanaka
- Corporate Research Center, Toyobo Co., Ltd, 2-1-1 Katata, Otsu, Shiga, 520-0292, Japan
| | - Tsuyoshi Minami
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
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2
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Corteselli EM, Sharafi M, Hondal R, MacPherson M, White S, Lam YW, Gold C, Manuel AM, van der Vliet A, Schneebeli ST, Anathy V, Li J, Janssen-Heininger YMW. Structural and functional fine mapping of cysteines in mammalian glutaredoxin reveal their differential oxidation susceptibility. Nat Commun 2023; 14:4550. [PMID: 37507364 PMCID: PMC10382592 DOI: 10.1038/s41467-023-39664-2] [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: 06/28/2021] [Accepted: 06/21/2023] [Indexed: 07/30/2023] Open
Abstract
Protein-S-glutathionylation is a post-translational modification involving the conjugation of glutathione to protein thiols, which can modulate the activity and structure of key cellular proteins. Glutaredoxins (GLRX) are oxidoreductases that regulate this process by performing deglutathionylation. However, GLRX has five cysteines that are potentially vulnerable to oxidative modification, which is associated with GLRX aggregation and loss of activity. To date, GLRX cysteines that are oxidatively modified and their relative susceptibilities remain unknown. We utilized molecular modeling approaches, activity assays using recombinant GLRX, coupled with site-directed mutagenesis of each cysteine both individually and in combination to address the oxidizibility of GLRX cysteines. These approaches reveal that C8 and C83 are targets for S-glutathionylation and oxidation by hydrogen peroxide in vitro. In silico modeling and experimental validation confirm a prominent role of C8 for dimer formation and aggregation. Lastly, combinatorial mutation of C8, C26, and C83 results in increased activity of GLRX and resistance to oxidative inactivation and aggregation. Results from these integrated computational and experimental studies provide insights into the relative oxidizability of GLRX's cysteines and have implications for the use of GLRX as a therapeutic in settings of dysregulated protein glutathionylation.
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Affiliation(s)
- Elizabeth M Corteselli
- Department of Pathology and Laboratory of Medicine, University of Vermont Larner College of Medicine, Burlington, VT, 05405, USA
| | - Mona Sharafi
- Department of Chemistry, University of Vermont, Burlington, VT, 05405, USA
| | - Robert Hondal
- Department of Biochemistry, University of Vermont, Burlington, VT, 05405, USA
| | - Maximilian MacPherson
- Department of Pathology and Laboratory of Medicine, University of Vermont Larner College of Medicine, Burlington, VT, 05405, USA
| | - Sheryl White
- Neuroscience Cellular and Molecular Core, University of Vermont Larner College of Medicine, Burlington, VT, 05405, USA
| | - Ying-Wai Lam
- Vermont Biomedical Research Network Proteomics Facility, University of Vermont, Burlington, VT, 05405, USA
| | - Clarissa Gold
- Vermont Biomedical Research Network Proteomics Facility, University of Vermont, Burlington, VT, 05405, USA
| | - Allison M Manuel
- Department of Pathology and Laboratory of Medicine, University of Vermont Larner College of Medicine, Burlington, VT, 05405, USA
| | - Albert van der Vliet
- Department of Pathology and Laboratory of Medicine, University of Vermont Larner College of Medicine, Burlington, VT, 05405, USA
| | - Severin T Schneebeli
- Department of Industrial and Physical Pharmacy and Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA
| | - Vikas Anathy
- Department of Pathology and Laboratory of Medicine, University of Vermont Larner College of Medicine, Burlington, VT, 05405, USA
| | - Jianing Li
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, 47907, USA.
| | - Yvonne M W Janssen-Heininger
- Department of Pathology and Laboratory of Medicine, University of Vermont Larner College of Medicine, Burlington, VT, 05405, USA.
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3
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Travagli V, Iorio EL. The Biological and Molecular Action of Ozone and Its Derivatives: State-of-the-Art, Enhanced Scenarios, and Quality Insights. Int J Mol Sci 2023; 24:ijms24108465. [PMID: 37239818 DOI: 10.3390/ijms24108465] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/19/2023] [Accepted: 05/04/2023] [Indexed: 05/28/2023] Open
Abstract
The ultimate objective of this review is to encourage a multi-disciplinary and integrated methodological approach that, starting from the recognition of some current uncertainties, helps to deepen the molecular bases of ozone treatment effects on human and animal well-being and to optimize their performance in terms of reproducibility of results, quality, and safety. In fact, the common therapeutic treatments are normally documented by healthcare professionals' prescriptions. The same applies to medicinal gases (whose uses are based on their pharmacological effects) that are intended for patients for treatment, diagnostic, or preventive purposes and that have been produced and inspected in accordance with good manufacturing practices and pharmacopoeia monographs. On the contrary, it is the responsibility of healthcare professionals, who thoughtfully choose to use ozone as a medicinal product, to achieve the following objectives: (i) to understand the molecular basis of the mechanism of action; (ii) to adjust the treatment according to the clinical responses obtained in accordance with the principles of precision medicine and personalized therapy; (iii) to ensure all quality standards.
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Affiliation(s)
- Valter Travagli
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena, Viale Aldo Moro 2, 53100 Siena, Italy
| | - Eugenio Luigi Iorio
- International Observatory of Oxidative Stress, 84127 Salerno, Italy
- Campus Uberlândia, Universidade de Uberaba (UNIUBE), Uberlândia 38055-500, Brazil
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Chowdhury S, Sharma P, Kundu K, Das PP, Rathi P, Siril PF. Systematic Thiol Decoration in a Redox-Active UiO-66-(SH) 2 Metal-Organic Framework: A Case Study under Oxidative and Reductive Conditions. Inorg Chem 2023; 62:3875-3885. [PMID: 36802595 DOI: 10.1021/acs.inorgchem.2c04233] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The practical applicability of thiolated metal-organic frameworks (MOFs) remains challenging due to their low crystallinity and transient stability. Herein, we present a one-pot solvothermal synthesis process using varying ratios of 2,5-dimercaptoterephthalic acid (DMBD) and 1,4-benzene dicarboxylic acid (100/0, 75/25, 50/50, 25/75, and 0/100) to prepare stable mixed-linker UiO-66-(SH)2 MOFs (ML-U66SX). For each variant, the effects of different linker ratios on the crystallinity, defectiveness, porosity, and particle size have been discussed in detail. In addition, the impact of modulator concentration on these features has also been described. The stability of ML-U66SX MOFs was investigated under reductive and oxidative chemical conditions. The mixed-linker MOFs were used as sacrificial catalyst supports to highlight the interplay of template stability on the rate of the gold-catalyzed 4-nitrophenol hydrogenation reaction. The release of catalytically active gold nanoclusters originating from the framework collapse decreased with the controlled DMBD proportion, resulting in a 59% drop in the normalized rate constants (9.11-3.73 s-1 mg-1). In addition, post-synthetic oxidation (PSO) was used to further probe the stability of the mixed-linker thiol MOFs under harsh oxidative conditions. Following oxidation, the UiO-66-(SH)2 MOF underwent immediate structural breakdown, unlike other mixed-linker variants. Along with crystallinity, the microporous surface area of the post-synthetically oxidized UiO-66-(SH)2 MOF could be increased from 0 to 739 m2 g-1. Thus, the present study delineates a mixed-linker strategy to stabilize the UiO-66-(SH)2 MOF under harsh chemical conditions through meticulous thiol decoration.
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Affiliation(s)
- Sumanta Chowdhury
- School of Basic Sciences and Advanced Materials Research Centre, Indian Institute of Technology Mandi, Mandi 175005, Himachal Pradesh, India
| | - Parul Sharma
- School of Basic Sciences and Advanced Materials Research Centre, Indian Institute of Technology Mandi, Mandi 175005, Himachal Pradesh, India
| | - Koustav Kundu
- School of Basic Sciences and Advanced Materials Research Centre, Indian Institute of Technology Mandi, Mandi 175005, Himachal Pradesh, India
| | - Partha Pratim Das
- Centre for Novel States of Complex Materials Research, Seoul National University, Seoul 08826, Republic of Korea
| | - Preeti Rathi
- School of Basic Sciences and Advanced Materials Research Centre, Indian Institute of Technology Mandi, Mandi 175005, Himachal Pradesh, India
| | - Prem Felix Siril
- School of Basic Sciences and Advanced Materials Research Centre, Indian Institute of Technology Mandi, Mandi 175005, Himachal Pradesh, India
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5
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Siddiqui SI, Malik C, Ghosh S. Voltage dependent anion channel and its interaction with N-acetyl-L-Cysteine (NAC) under oxidative stress on planar lipid bilayer. Biochimie 2023; 209:150-160. [PMID: 36780980 DOI: 10.1016/j.biochi.2023.02.005] [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: 07/23/2022] [Revised: 12/30/2022] [Accepted: 02/08/2023] [Indexed: 02/13/2023]
Abstract
Mitochondria are the major source of Hydrogen Peroxide (H2O2), a reactive oxygen species, in the cells. The reactive oxygen species generated by the mitochondria oxidize major proteins including Voltage Dependent Anion Channel (VDAC). We were interested to know how the effect of H2O2 is countered by antioxidants present around the mitochondria. N-Acetyl-l-Cysteine (NAC) is a naturally existing antioxidant in the cells. Keeping this in view, the modulatory effect of antioxidant NAC on H2O2 oxidized VDAC has been investigated through in vitro electrophysiological studies. First, the effect of H2O2 and NAC was studied on independently incorporated single-channel VDAC. It was observed that NAC suppresses VDAC conductance with a half-maximal inhibitory concentration (IC50) of ∼1.04 μM. In contrast, H2O2 enhances VDAC conductance. Later, oxidative stress was induced by H2O2 on VDAC increased conductance with half-maximal effective concentration (EC50) of ∼302 nM. An application of 1 μM NAC on H2O2 treated (300 nM) VDAC reversed the effect of oxidation. In the next step, NAC and H2O2 were added in reverse order. When oxidative stress was induced using H2O2, reduction in conductance by NAC was 4.5 ± 0.404 nS. The change in conductance is nearly 6.3%. However, if antioxidant NAC was incubated first followed by H2O2 treatment, the conductance of VDAC was 3.09 ± 0.27 nS. The change in conductance is near 33%. Both H2O2 and NAC also affected various conducting states of VDAC. In-silico studies indicated the binding of NAC at Lysine and Glutamic acid of VDAC. Hence, NAC was found to be effective in protection of VDAC against H2O2-induced oxidative stress due to its strong binding.
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Affiliation(s)
- Shumaila Iqbal Siddiqui
- Department of Biophysics, Benito Juarez Road, University of Delhi South Campus, New Delhi, 110021, India
| | - Chetan Malik
- Department of Biophysics, Benito Juarez Road, University of Delhi South Campus, New Delhi, 110021, India
| | - Subhendu Ghosh
- Department of Biophysics, Benito Juarez Road, University of Delhi South Campus, New Delhi, 110021, India.
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6
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Bittner-Schwerda L, Malama E, Siuda M, van Loon B, Bollwein H. The sperm chromatin structure assay does not detect alterations in sperm chromatin structure induced by hydrogen peroxide. Anim Reprod Sci 2022; 247:107094. [DOI: 10.1016/j.anireprosci.2022.107094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 10/08/2022] [Accepted: 10/12/2022] [Indexed: 11/01/2022]
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7
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A. HP, Diwakar L, Ravindranath V. Protein Glutathionylation and Glutaredoxin: Role in Neurodegenerative Diseases. Antioxidants (Basel) 2022; 11:antiox11122334. [PMID: 36552543 PMCID: PMC9774553 DOI: 10.3390/antiox11122334] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/14/2022] [Accepted: 11/15/2022] [Indexed: 11/29/2022] Open
Abstract
Oxidative stress has been implicated in the pathogenesis and progression of many neurodegenerative disorders including Parkinson's disease and Alzheimer's disease. One of the major enzyme systems involved in the defense against reactive oxygen species are the tripeptide glutathione and oxidoreductase glutaredoxin. Glutathione and glutaredoxin system are very important in the brain because of the oxidative modification of protein thiols to protein glutathione mixed disulfides with the concomitant formation of oxidized glutathione during oxidative stress. Formation of Pr-SSG acts as a sink in the brain and is reduced back to protein thiols during recovery, thus restoring protein functions. This is unlike in the liver, which has a high turnover of glutathione, and formation of Pr-SSG is very minimal as liver is able to quickly quench the prooxidant species. Given the important role glutathione and glutaredoxin play in the brain, both in normal and pathologic states, it is necessary to study ways to augment the system to help maintain the protein thiol status. This review details the importance of glutathione and glutaredoxin systems in several neurodegenerative disorders and emphasizes the potential augmentation of this system as a target to effectively protect the brain during aging.
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Affiliation(s)
- Haseena P. A.
- Centre for Brain Research, Indian Institute of Science, Bangalore 560012, India
- Manipal Academy of Higher Education (MAHE), Manipal 576104, India
| | - Latha Diwakar
- Centre for Brain Research, Indian Institute of Science, Bangalore 560012, India
| | - Vijayalakshmi Ravindranath
- Centre for Brain Research, Indian Institute of Science, Bangalore 560012, India
- Correspondence: ; Tel.: +91-80-22933433; Fax: +91-80-23603323
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8
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Garrido Ruiz D, Sandoval-Perez A, Rangarajan AV, Gunderson EL, Jacobson MP. Cysteine Oxidation in Proteins: Structure, Biophysics, and Simulation. Biochemistry 2022; 61:2165-2176. [PMID: 36161872 PMCID: PMC9583617 DOI: 10.1021/acs.biochem.2c00349] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Cysteine side chains
can exist in distinct oxidation
states depending
on the pH and redox potential of the environment, and cysteine oxidation
plays important yet complex regulatory roles. Compared with the effects
of post-translational modifications such as phosphorylation, the effects
of oxidation of cysteine to sulfenic, sulfinic, and sulfonic acid
on protein structure and function remain relatively poorly characterized.
We present an analysis of the role of cysteine reactivity as a regulatory
factor in proteins, emphasizing the interplay between electrostatics
and redox potential as key determinants of the resulting oxidation
state. A review of current computational approaches suggests underdeveloped
areas of research for studying cysteine reactivity through molecular
simulations.
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Affiliation(s)
- Diego Garrido Ruiz
- Department of Pharmaceutical Chemistry, University of California, San Francisco, California 94158, United States
| | - Angelica Sandoval-Perez
- Department of Pharmaceutical Chemistry, University of California, San Francisco, California 94158, United States
| | - Amith Vikram Rangarajan
- Department of Pharmaceutical Chemistry, University of California, San Francisco, California 94158, United States
| | - Emma L Gunderson
- Department of Pharmaceutical Chemistry, University of California, San Francisco, California 94158, United States
| | - Matthew P Jacobson
- Department of Pharmaceutical Chemistry, University of California, San Francisco, California 94158, United States
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9
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Morris G, Gevezova M, Sarafian V, Maes M. Redox regulation of the immune response. Cell Mol Immunol 2022; 19:1079-1101. [PMID: 36056148 PMCID: PMC9508259 DOI: 10.1038/s41423-022-00902-0] [Citation(s) in RCA: 133] [Impact Index Per Article: 66.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 06/29/2022] [Indexed: 12/20/2022] Open
Abstract
AbstractThe immune-inflammatory response is associated with increased nitro-oxidative stress. The aim of this mechanistic review is to examine: (a) the role of redox-sensitive transcription factors and enzymes, ROS/RNS production, and the activity of cellular antioxidants in the activation and performance of macrophages, dendritic cells, neutrophils, T-cells, B-cells, and natural killer cells; (b) the involvement of high-density lipoprotein (HDL), apolipoprotein A1 (ApoA1), paraoxonase-1 (PON1), and oxidized phospholipids in regulating the immune response; and (c) the detrimental effects of hypernitrosylation and chronic nitro-oxidative stress on the immune response. The redox changes during immune-inflammatory responses are orchestrated by the actions of nuclear factor-κB, HIF1α, the mechanistic target of rapamycin, the phosphatidylinositol 3-kinase/protein kinase B signaling pathway, mitogen-activated protein kinases, 5' AMP-activated protein kinase, and peroxisome proliferator-activated receptor. The performance and survival of individual immune cells is under redox control and depends on intracellular and extracellular levels of ROS/RNS. They are heavily influenced by cellular antioxidants including the glutathione and thioredoxin systems, nuclear factor erythroid 2-related factor 2, and the HDL/ApoA1/PON1 complex. Chronic nitro-oxidative stress and hypernitrosylation inhibit the activity of those antioxidant systems, the tricarboxylic acid cycle, mitochondrial functions, and the metabolism of immune cells. In conclusion, redox-associated mechanisms modulate metabolic reprogramming of immune cells, macrophage and T helper cell polarization, phagocytosis, production of pro- versus anti-inflammatory cytokines, immune training and tolerance, chemotaxis, pathogen sensing, antiviral and antibacterial effects, Toll-like receptor activity, and endotoxin tolerance.
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10
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Nanohybrid graphene oxide membranes functionalized using 3-mercaptopropyl trimethoxysilane for proton exchange membrane fuel cells. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.121035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Madabeni A, Zucchelli S, Nogara PA, Rocha JBT, Orian L. In the Chalcogenoxide Elimination Panorama: Systematic Insight into a Key Reaction. J Org Chem 2022; 87:11766-11775. [PMID: 35951408 PMCID: PMC9442651 DOI: 10.1021/acs.joc.2c01454] [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] [Indexed: 11/28/2022]
Abstract
![]()
The selenoxide elimination is a well-known reaction in
organochalcogen
chemistry, with wide synthetic, biological, and toxicological implications.
In this work, we apply benchmarked density functional theory (DFT)
calculations to investigate different aspects of the title reaction
in three (bio)chemically relevant models, spanning minimal systems
of theoretical interests as well as biological or synthetic organochalcogenides.
The activation strain analysis (ASA) methodology is employed along
a suitable reaction coordinate to obtain insight into the role of
the chalcogen and of the oxidation state, to pinpoint the factors
that tune the elimination reactivity of the investigated systems.
Lastly, we computationally validate the hypothesis that telluroxides
eliminate more slowly than selenoxides because of a detrimental hydration
process that leads to unreactive hydrates.
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Affiliation(s)
- Andrea Madabeni
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Simone Zucchelli
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Pablo A Nogara
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria (UFSM), Santa Maria, 97105-900, RS, Brazil
| | - João B T Rocha
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria (UFSM), Santa Maria, 97105-900, RS, Brazil
| | - Laura Orian
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
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Wang K, Li Y, Zhang Y, Luo X, Sun J. Improving myofibrillar proteins solubility and thermostability in low-ionic strength solution: A review. Meat Sci 2022; 189:108822. [PMID: 35413661 DOI: 10.1016/j.meatsci.2022.108822] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 04/04/2022] [Accepted: 04/04/2022] [Indexed: 11/19/2022]
Abstract
The development of myofibrillar proteins drinks (MPDs) can provide meat protein nutrition to specific groups of people. However, one major challenge is that myofibrillar proteins (MPs) are insoluble in solutions with a low ionic strength. Another functional constraint is the susceptibility of MPs to heat-induced aggregation. Currently, the primary approach used to improve the water solubility of MPs is to inhibit the assembly of myofilaments. Increasing the thermostability of MPs primarily inhibits the aggregation of myosin or oxidizes myosin to soluble substances. This review focuses on the description of several chemical and physical strategies, with an emphasis on the advantages, disadvantages, and recent progress. Under the myosin filament assembly process and the cross-linking aggregation mechanism, this summary helps improve our understanding of the solution and thermostability of MPs in low-ionic-strength solutions, thus providing new ideas to the development of MPDs.
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Affiliation(s)
- Ke Wang
- College of Food Science & Engineering, Qingdao Agricultural University, Qingdao 266109, China; College of Food Science & Engineering, Shandong Agricultural University, Tai'an 271018, China
| | - Yan Li
- College of Food Science & Engineering, Qingdao Agricultural University, Qingdao 266109, China
| | - Yimin Zhang
- College of Food Science & Engineering, Shandong Agricultural University, Tai'an 271018, China
| | - Xin Luo
- College of Food Science & Engineering, Shandong Agricultural University, Tai'an 271018, China
| | - Jingxin Sun
- College of Food Science & Engineering, Qingdao Agricultural University, Qingdao 266109, China.
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Effects of Peroxyl Radicals on the Structural Characteristics and Fatty Acid Composition of High-Density Lipoprotein from Duck Egg Yolk. Foods 2022; 11:foods11111634. [PMID: 35681384 PMCID: PMC9180385 DOI: 10.3390/foods11111634] [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: 04/19/2022] [Revised: 05/27/2022] [Accepted: 05/28/2022] [Indexed: 11/17/2022] Open
Abstract
In this study, high-density lipoprotein (HDL) from duck egg yolk was subjected to oxidation with a system based on 2,2′-azobis (2-amidinopropane) dihydrochloride (AAPH)-derived peroxyl radicals. The effects of peroxyl radicals on the protein carbonyl, free sulfhydryl, secondary/tertiary structure, surface hydrophobicity, solubility, particle size distribution, zeta potential and fatty acid composition of HDL were investigated by using sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), Fourier-transform infrared spectroscopy (FTIR), circular dichroism (CD), fluorescence spectroscopy, dynamic light scattering and ultra-high-performance liquid chromatography coupled to tandem mass spectrometry (UHPLC-MS/MS). The results indicated that the content of protein carbonyl was significantly increased, that of free sulfhydryl was obviously reduced, and the ordered secondary structure was also decreased with increasing AAPH concentration. In addition, the surface hydrophobicity and solubility of HDL showed apparent increases due to the exposure of hydrophobic groups and aggregation of protein caused by oxidation. The fatty acid composition of HDL exhibited pronounced changes due to the disrupted protein–lipid interaction and lipid oxidation by AAPH-derived peroxyl radicals. These results may help to elucidate the molecular mechanism for the effect of lipid oxidation products on the oxidation of duck yolk proteins.
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14
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Effects of sulfur phase transition on moisture-induced damages in bitumen colloidal structure. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.11.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Jeong H, Kim Y, Lee HS. OsnR is an autoregulatory negative transcription factor controlling redox-dependent stress responses in Corynebacterium glutamicum. Microb Cell Fact 2021; 20:203. [PMID: 34663317 PMCID: PMC8524982 DOI: 10.1186/s12934-021-01693-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 10/07/2021] [Indexed: 01/11/2023] Open
Abstract
Background Corynebacterium glutamicum is used in the industrial production of amino acids and nucleotides. During the course of fermentation, C. glutamicum cells face various stresses and employ multiple regulatory genes to cope with the oxidative stress. The osnR gene plays a negative regulatory role in redox-dependent oxidative-stress responses, but the underlying mechanism is not known yet. Results Overexpression of the osnR gene in C. glutamicum affected the expression of genes involved in the mycothiol metabolism. ChIP-seq analysis revealed that OsnR binds to the promoter region of multiple genes, including osnR and cg0026, which seems to function in the membrane-associated redox metabolism. Studies on the role of the osnR gene involving in vitro assays employing purified OsnR proteins and in vivo physiological analyses have identified that OsnR inhibits the transcription of its own gene. Further, oxidant diamide stimulates OsnR-binding to the promoter region of the osnR gene. The genes affected by the overexpression of osnR have been found to be under the control of σH. In the osnR-overexpressing strain, the transcription of sigH is significantly decreased and the stimulation of sigH transcription by external stress is lost, suggesting that osnR and sigH form an intimate regulatory network. Conclusions Our study suggests that OsnR not only functions as a transcriptional repressor of its own gene and of those involved in redox-dependent stress responses but also participates in the global transcriptional regulation by controlling the transcription of other master regulators, such as sigH. Supplementary Information The online version contains supplementary material available at 10.1186/s12934-021-01693-1.
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Affiliation(s)
- Haeri Jeong
- Department of Biotechnology and Bioinformatics, Korea University, Sejong, Republic of Korea
| | - Younhee Kim
- Department of Korean Medicine, Semyung University, Jecheon, Chungbuk, Republic of Korea
| | - Heung-Shick Lee
- Department of Biotechnology and Bioinformatics, Korea University, Sejong, Republic of Korea.
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16
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Xu L, Hou H, Farkas B, Keener KM, Garner AL, Tao B. High voltage atmospheric cold plasma modification of bovine serum albumin. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.111995] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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17
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Liu H, Wang Z, Badar IH, Liu Q, Chen Q, Kong B. Combination of high-intensity ultrasound and hydrogen peroxide treatment suppresses thermal aggregation behaviour of myofibrillar protein in water. Food Chem 2021; 367:130756. [PMID: 34388633 DOI: 10.1016/j.foodchem.2021.130756] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 07/24/2021] [Accepted: 08/02/2021] [Indexed: 12/20/2022]
Abstract
This study was aimed at evaluating the potential of high-intensity ultrasound (HIU, 450 W for 10 min) combined with hydrogen peroxide (H2O2) having various concentrations (0, 50, 100, 200, 400, 800 μmol/g protein) to inhibit the thermal aggregation behavior of myofibrillar proteins (MPs) in water. The results indicated that the addition of H2O2 interfered with the intermolecular sulfhydryl-disulfide interchange and inhibited the disulfide bond cross-linking. The H2O2-mediated conversion of cysteine to thiol derivatives appeared to be the primary mechanism of this effect. The HIU combined with H2O2, especially at the H2O2 concentration of 200 μmol/g, corresponded to a more significant inhibitory effect than that of only H2O2, which attributed to the dissociation of the filamentous myosin structure that led to an enhanced accessibility of the buried sulfhydryl groups. In conclusion, these findings provide direct evidence for the role of HIU combined with H2O2 in improving the thermal stability of MPs.
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Affiliation(s)
- Haotian Liu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Zhi Wang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Iftikhar Hussain Badar
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Department of Meat Science and Technology, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Qian Liu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Qian Chen
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
| | - Baohua Kong
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
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18
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Okazaki Y, Tanaka H, Matsumoto KI, Hori M, Toyokuni S. Non-thermal plasma-induced DMPO-OH yields hydrogen peroxide. Arch Biochem Biophys 2021; 705:108901. [PMID: 33964248 DOI: 10.1016/j.abb.2021.108901] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/14/2021] [Accepted: 04/29/2021] [Indexed: 12/26/2022]
Abstract
Recent developments in electronics have enabled the medical applications of non-thermal plasma (NTP), which elicits reactive oxygen species (ROS) and reactive nitrogen species (RNS), such as hydroxyl radical (●OH), hydrogen peroxide (H2O2), singlet oxygen (1O2), superoxide (O2●-), ozone, and nitric oxide at near-physiological temperatures. In preclinical studies or human clinical trials, NTP promotes blood coagulation, eradication of bacterial, viral and biofilm-related infections, wound healing, and cancer cell death. To elucidate the solution-phase biological effects of NTP in the presence of biocompatible reducing agents, we employed electron paramagnetic resonance (EPR) spectroscopy to quantify ●OH using a spin-trapping probe, 5,5-dimethyl-1-pyrroline-N-oxide (DMPO); 1O2 using a fluorescent probe; and O2●- and H2O2 using luminescent probes in the presence of thiols or tempol. NTP-induced ●OH was significantly scavenged by dithiothreitol (DTT), reduced glutathione (GSH), and oxidized glutathione (GSSG) in 2 or 5 mM DMPO. NTP-induced O2●- was significantly scavenged by 10 μM DTT and GSH, while 1O2 was not efficiently scavenged by these compounds. GSSG degraded H2O2 more effectively than GSH and DTT, suggesting that the disulfide bonds reacted with H2O2. In the presence of 1-50 mM DMPO, NTP-induced H2O2 quantities were unchanged. The inhibitory effect of tempol concentration (50 and 100 μM) on H2O2 production was observed in 1 and 10 mM DMPO, whereas it became ineffective in 50 mM DMPO. Furthermore, DMPO-OH did not interact with tempol. These results suggest that DMPO and tempol react competitively with O2●-. Further studies are warranted to elucidate the interaction between NTP-induced ROS and biomolecules.
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Affiliation(s)
- Yasumasa Okazaki
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Showa-Ku, Nagoya, 466-8550, Japan.
| | - Hiromasa Tanaka
- Center for Low-temperature Plasma Sciences, Nagoya University, Chikusa-ku, Nagoya, 464-8603, Japan; Center for Advanced Medicine and Clinical Research, Nagoya University Graduate School of Medicine, Showa-Ku, Nagoya, 466-8550, Japan
| | - Ken-Ichiro Matsumoto
- Quantitative RedOx Sensing Group, Department of Radiation Regulatory Science Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum and Radiological Science and Technology, Chiba, 263-8555, Japan
| | - Masaru Hori
- Center for Low-temperature Plasma Sciences, Nagoya University, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Shinya Toyokuni
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Showa-Ku, Nagoya, 466-8550, Japan; Center for Low-temperature Plasma Sciences, Nagoya University, Chikusa-ku, Nagoya, 464-8603, Japan.
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19
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Pedre B, Barayeu U, Ezeriņa D, Dick TP. The mechanism of action of N-acetylcysteine (NAC): The emerging role of H 2S and sulfane sulfur species. Pharmacol Ther 2021; 228:107916. [PMID: 34171332 DOI: 10.1016/j.pharmthera.2021.107916] [Citation(s) in RCA: 163] [Impact Index Per Article: 54.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/21/2021] [Accepted: 05/24/2021] [Indexed: 12/19/2022]
Abstract
Initially adopted as a mucolytic about 60 years ago, the cysteine prodrug N-acetylcysteine (NAC) is the standard of care to treat paracetamol intoxication, and is included on the World Health Organization's list of essential medicines. Additionally, NAC increasingly became the epitome of an "antioxidant". Arguably, it is the most widely used "antioxidant" in experimental cell and animal biology, as well as clinical studies. Most investigators use and test NAC with the idea that it prevents or attenuates oxidative stress. Conventionally, it is assumed that NAC acts as (i) a reductant of disulfide bonds, (ii) a scavenger of reactive oxygen species and/or (iii) a precursor for glutathione biosynthesis. While these mechanisms may apply under specific circumstances, they cannot be generalized to explain the effects of NAC in a majority of settings and situations. In most cases the mechanism of action has remained unclear and untested. In this review, we discuss the validity of conventional assumptions and the scope of a newly discovered mechanism of action, namely the conversion of NAC into hydrogen sulfide and sulfane sulfur species. The antioxidative and cytoprotective activities of per- and polysulfides may explain many of the effects that have previously been ascribed to NAC or NAC-derived glutathione.
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Affiliation(s)
- Brandán Pedre
- Division of Redox Regulation, DKFZ-ZMBH Alliance, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Uladzimir Barayeu
- Division of Redox Regulation, DKFZ-ZMBH Alliance, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany; Faculty of Biosciences, Heidelberg University, 69120 Heidelberg, Germany
| | - Daria Ezeriņa
- Division of Redox Regulation, DKFZ-ZMBH Alliance, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany; Faculty of Biosciences, Heidelberg University, 69120 Heidelberg, Germany
| | - Tobias P Dick
- Division of Redox Regulation, DKFZ-ZMBH Alliance, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany; Faculty of Biosciences, Heidelberg University, 69120 Heidelberg, Germany.
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20
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Fujita M, Yamamoto Y, Watanabe K, Suzuki K, Kasahara T. Cause Clarification of Cysteine Oxidation by Active Species Generated during the Oxidation Process of Cinnamaldehyde and Impact on an In Chemico Alternative Method for Skin Sensitization Using a Nucleophilic Reagent Containing Cysteine. Chem Res Toxicol 2021; 34:1749-1758. [PMID: 34110798 DOI: 10.1021/acs.chemrestox.1c00097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Aldehydes comprise a major portion of skin sensitizers because they can react with both cysteine and lysine. Moreover, cinnamaldehyde (CA) is a typical moderate sensitizer and is often used in an alternative test method for skin sensitization. The amino acid derivative reactivity assay (ADRA) is an in chemico test method that evaluates the reactivity of cysteine derivatives (N-(2-(1-naphthyl)acetyl)-l-cysteine, NAC) and lysine derivatives with the test chemicals and uses CA as a proficiency substance. We found that NAC depletion for CA was only 10-20% when CA was used directly from the reagent bottle, although it increased to almost 100% when stored after being aliquoted from the reagent bottle. It was also found that this was due to the air oxidation of NAC itself rather than the reaction of NAC with CA, indicating that this result simply shows an increase in apparent reactivity. Aldehydes are known to produce active species, such as radicals, during air oxidation. Therefore, we investigated whether radicals were generated under storage conditions using the radical scavenger OH-TEMPO. LC/MS/MS analysis revealed that CA and OH-TEMPO complexes were produced during the air oxidation of CA. In the results of five aldehydes, similar to CA, active species were not generated as significantly as CA. Collectively, during the evaluation of the aldehydes, it can be seen that careful measures need to be taken to prevent the aldehydes from oxidizing during storage, indicating that assessment without preventing air oxidation carries an increased risk of overestimation compared with the intrinsic skin sensitization potency.
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Affiliation(s)
- Masaharu Fujita
- Safety Evaluation Centre, Ecology & Quality Management Division, ESG Division, Fujifilm Corporation, 210 Nakanuma, Minamiashigara-shi, Kanagawa, Japan
| | - Yusuke Yamamoto
- Safety Evaluation Centre, Ecology & Quality Management Division, ESG Division, Fujifilm Corporation, 210 Nakanuma, Minamiashigara-shi, Kanagawa, Japan
| | - Kumiko Watanabe
- Research & Development Management Headquarters, Analysis Technology Center, Fujifilm Corporation, 210 Nakanuma, Minamiashigara-shi, Kanagawa, Japan
| | - Koo Suzuki
- Research & Development Management Headquarters, Analysis Technology Center, Fujifilm Corporation, 210 Nakanuma, Minamiashigara-shi, Kanagawa, Japan
| | - Toshihiko Kasahara
- Safety Evaluation Centre, Ecology & Quality Management Division, ESG Division, Fujifilm Corporation, 210 Nakanuma, Minamiashigara-shi, Kanagawa, Japan
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21
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Madabeni A, Nogara PA, Bortoli M, Rocha JB, Orian L. Effect of Methylmercury Binding on the Peroxide-Reducing Potential of Cysteine and Selenocysteine. Inorg Chem 2021; 60:4646-4656. [PMID: 33587617 PMCID: PMC8763373 DOI: 10.1021/acs.inorgchem.0c03619] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Indexed: 01/09/2023]
Abstract
Methylmercury (CH3Hg+) binding to catalytically fundamental cysteine and selenocysteine of peroxide-reducing enzymes has long been postulated as the origin of its toxicological activity. Only very recently, CH3Hg+ binding to the selenocysteine of thioredoxin reductase has been directly observed [Pickering, I. J. Inorg. Chem., 2020, 59, 2711-2718], but the precise influence of the toxicant on the peroxide-reducing potential of such a residue has never been investigated. In this work, we employ state-of-the-art density functional theory calculations to study the reactivity of molecular models of the free and toxified enzymes. Trends in activation energies are discussed with attention to the biological consequences and are rationalized within the chemically intuitive framework provided by the activation strain model. With respect to the free, protonated amino acids, CH3Hg+ binding promotes oxidation of the S or Se nucleus, suggesting that chalcogenoxide formation might occur in the toxified enzyme, even if the actual rate of peroxide reduction is almost certainly lowered as suggested by comparison with fully deprotonated amino acids models.
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Affiliation(s)
- Andrea Madabeni
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Pablo A. Nogara
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
- Departamento
de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria (UFSM), 97105-900 Santa
Maria, RS, Brazil
| | - Marco Bortoli
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - João B.
T. Rocha
- Departamento
de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria (UFSM), 97105-900 Santa
Maria, RS, Brazil
| | - Laura Orian
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
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22
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Stoichiometric Thiol Redox Proteomics for Quantifying Cellular Responses to Perturbations. Antioxidants (Basel) 2021; 10:antiox10030499. [PMID: 33807006 PMCID: PMC8004825 DOI: 10.3390/antiox10030499] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/16/2021] [Accepted: 03/17/2021] [Indexed: 12/14/2022] Open
Abstract
Post-translational modifications regulate the structure and function of proteins that can result in changes to the activity of different pathways. These include modifications altering the redox state of thiol groups on protein cysteine residues, which are sensitive to oxidative environments. While mass spectrometry has advanced the identification of protein thiol modifications and expanded our knowledge of redox-sensitive pathways, the quantitative aspect of this technique is critical for the field of redox proteomics. In this review, we describe how mass spectrometry-based redox proteomics has enabled researchers to accurately quantify the stoichiometry of reversible oxidative modifications on specific cysteine residues of proteins. We will describe advancements in the methodology that allow for the absolute quantitation of thiol modifications, as well as recent reports that have implemented this approach. We will also highlight the significance and application of such measurements and why they are informative for the field of redox biology.
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23
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Adhikari B, Sahu N. COVID-19 into Chemical Science Perspective: Chemical Preventive Measures and Drug Development. ChemistrySelect 2021; 6:2010-2028. [PMID: 33821213 PMCID: PMC8013609 DOI: 10.1002/slct.202100127] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 02/12/2021] [Indexed: 01/08/2023]
Abstract
COVID-19 facts and literature are discussed into chemical science intuition highlighting the direct role of chemistry to the ongoing global pandemic by covering structural identification of the virus, chemical preventive measures and development of drugs. We reviewed the four most promising repurposed drugs which are presently being investigated in mass clinical trials on COVID-19 infected persons and synthetic routes of these drugs with their recent advancement. Chemical preventive measures such as soap water, hand sanitizer and disinfectant are the only available options in the arsenal to fight against COVID-19, till an effective medicine or vaccine will be made available. As such the present review will focus on the mode of action of the major chemical preventives.
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Affiliation(s)
- Bimalendu Adhikari
- Department of ChemistryNational Institute of Technology Rourkela RourkelaOdisha769008India
| | - Nihar Sahu
- Department of ChemistryNational Institute of Technology Rourkela RourkelaOdisha769008India
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24
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Turell L, Steglich M, Torres MJ, Deambrosi M, Antmann L, Furdui CM, Schopfer FJ, Alvarez B. Sulfenic acid in human serum albumin: Reaction with thiols, oxidation and spontaneous decay. Free Radic Biol Med 2021; 165:254-264. [PMID: 33515755 DOI: 10.1016/j.freeradbiomed.2021.01.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/28/2020] [Accepted: 01/18/2021] [Indexed: 12/21/2022]
Abstract
Human serum albumin (HSA) contains 17 disulfides and only one reduced cysteine, Cys34, which can be oxidized to a relatively stable sulfenic acid (HSA-SOH). This derivative has been previously detected and quantified. However, its properties are poorly understood. Herein, HSA-SOH formation from the exposure of HSA to hydrogen peroxide was confirmed using the sulfenic acid probe bicyclo [6.1.0]nonyne-biotin (BCN-Bio1), and by direct detection by whole protein mass spectrometry. The decay pathways of HSA-SOH were studied. HSA-SOH reacted with a thiol leading to the formation of a mixed disulfide. The reaction occurred through a concerted or direct displacement mechanism (SN2) with the thiolate (RS-) as nucleophile towards HSA-SOH. The net charge of the thiolate affected the value of the rate constant. In the presence of hydrogen peroxide, HSA-SOH was further oxidized to sulfinic acid (HSA-SO2H) and sulfonic acid (HSA-SO3H). The rate constants of these reactions were estimated. Lastly, HSA-SOH spontaneously decayed in solution. Mass spectrometry experiments suggested that the decay product is a sulfenylamide (HSA-SN(R')R″). Chromatofocusing analysis showed that the overoxidation with hydrogen peroxide predominates at alkaline pH whereas the spontaneous decay predominates at acidic pH. The present findings provide insights into the reactivity and fate of the sulfenic acid in albumin, which are also of relevance to numerous sulfenic acid-mediated processes in redox biology and catalysis.
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Affiliation(s)
- Lucía Turell
- Laboratorio de Enzimología, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, 11400, Uruguay; Centro de Investigaciones Biomédicas (CEINBIO), Universidad de la República, Gral. Flores 2125, Montevideo, 11800, Uruguay.
| | - Martina Steglich
- Laboratorio de Enzimología, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, 11400, Uruguay; Centro de Investigaciones Biomédicas (CEINBIO), Universidad de la República, Gral. Flores 2125, Montevideo, 11800, Uruguay
| | - Maria J Torres
- Laboratorio de Enzimología, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, 11400, Uruguay
| | - Matías Deambrosi
- Laboratorio de Enzimología, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, 11400, Uruguay
| | - Laura Antmann
- Laboratorio de Enzimología, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, 11400, Uruguay
| | - Cristina M Furdui
- Department of Internal Medicine, Section on Molecular Medicine and Center for Redox Biology and Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Francisco J Schopfer
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15213, USA
| | - Beatriz Alvarez
- Laboratorio de Enzimología, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, 11400, Uruguay; Centro de Investigaciones Biomédicas (CEINBIO), Universidad de la República, Gral. Flores 2125, Montevideo, 11800, Uruguay.
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25
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Ascenção K, Dilek N, Augsburger F, Panagaki T, Zuhra K, Szabo C. Pharmacological induction of mesenchymal-epithelial transition via inhibition of H2S biosynthesis and consequent suppression of ACLY activity in colon cancer cells. Pharmacol Res 2021; 165:105393. [PMID: 33484818 DOI: 10.1016/j.phrs.2020.105393] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/12/2020] [Accepted: 12/12/2020] [Indexed: 02/07/2023]
Abstract
Hydrogen sulfide (H2S) is an important endogenous gaseous transmitter mediator, which regulates a variety of cellular functions in autocrine and paracrine manner. The enzymes responsible for the biological generation of H2S include cystathionine-β-synthase (CBS), cystathionine-γ-lyase (CSE) and 3-mercaptopyruvate sulfurtransferase (3-MST). Increased expression of these enzymes and overproduction of H2S has been implicated in essential processes of various cancer cells, including the stimulation of metabolism, maintenance of cell proliferation and cytoprotection. Cancer cell identity is characterized by so-called "transition states". The progression from normal (epithelial) to transformed (mesenchymal) state is termed epithelial-to-mesenchymal transition (EMT) whereby epithelial cells lose their cell-to-cell adhesion capacity and gain mesenchymal characteristics. The transition process can also proceed in the opposite direction, and this process is termed mesenchymal-to-epithelial transition (MET). The current project was designed to determine whether inhibition of endogenous H2S production in colon cancer cells affects the EMT/MET balance in vitro. Inhibition of H2S biosynthesis in HCT116 human colon cancer cells was achieved either with aminooxyacetic acid (AOAA) or 2-[(4-hydroxy-6-methylpyrimidin-2-yl)sulfanyl]-1-(naphthalen-1-yl)ethan-1-one (HMPSNE). These inhibitors induced an upregulation of E-cadherin and Zonula occludens-1 (ZO-1) expression and downregulation of fibronectin expression, demonstrating that H2S biosynthesis inhibitors can produce a pharmacological induction of MET in colon cancer cells. These actions were functionally reflected in an inhibition of cell migration, as demonstrated in an in vitro "scratch wound" assay. The mechanisms involved in the action of endogenously produced H2S in cancer cells in promoting (or maintaining) EMT (or tonically inhibiting MET) relate, at least in part, in the induction of ATP citrate lyase (ACLY) protein expression, which occurs via upregulation of ACLY mRNA (via activation of the ACLY promoter). ACLY in turn, regulates the Wnt-β-catenin pathway, an essential regulator of the EMT/MET balance. Taken together, pharmacological inhibition of endogenous H2S biosynthesis in cancer cells induces MET. We hypothesize that this may contribute to anti-cancer / anti-metastatic effects of H2S biosynthesis inhibitors.
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Affiliation(s)
- Kelly Ascenção
- Chair of Pharmacology, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.
| | - Nahzli Dilek
- Chair of Pharmacology, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.
| | - Fiona Augsburger
- Chair of Pharmacology, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.
| | - Theodora Panagaki
- Chair of Pharmacology, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.
| | - Karim Zuhra
- Chair of Pharmacology, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.
| | - Csaba Szabo
- Chair of Pharmacology, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.
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26
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Molnar K, Helfer CA, Kaszas G, Krisch E, Chen D, McKenna GB, Kornfield JA, Puskas JE. Liquid chromatography at critical conditions (LCCC): Capabilities and limitations for polymer analysis. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114956] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Xiong YL, Guo A. Animal and Plant Protein Oxidation: Chemical and Functional Property Significance. Foods 2020; 10:E40. [PMID: 33375649 PMCID: PMC7824645 DOI: 10.3390/foods10010040] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/17/2020] [Accepted: 12/21/2020] [Indexed: 12/29/2022] Open
Abstract
Protein oxidation, a phenomenon that was not well recognized previously but now better understood, is a complex chemical process occurring ubiquitously in food systems and can be induced by processing treatments as well. While early research concentrated on muscle protein oxidation, later investigations included plant, milk, and egg proteins. The process of protein oxidation involves both radicals and nonradicals, and amino acid side chain groups are usually the site of initial oxidant attack which generates protein carbonyls, disulfide, dityrosine, and protein radicals. The ensuing alteration of protein conformational structures and formation of protein polymers and aggregates can result in significant changes in solubility and functionality, such as gelation, emulsification, foaming, and water-holding. Oxidant dose-dependent effects have been widely reported, i.e., mild-to-moderate oxidation may enhance the functionality while strong oxidation leads to insolubilization and functionality losses. Therefore, controlling the extent of protein oxidation in both animal and plant protein foods through oxidative and antioxidative strategies has been of wide interest in model system as well in in situ studies. This review presents a historical perspective of food protein oxidation research and provides an inclusive discussion of the impact of chemical and enzymatic oxidation on functional properties of meat, legume, cereal, dairy, and egg proteins based on the literature reports published in recent decades.
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Affiliation(s)
- Youling L. Xiong
- Department of Animal and Food Sciences, University of Kentucky, Lexington, KY 40546, USA;
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Hagras MA, Bellucci MA, Gobbo G, Marek RA, Trout BL. Computational Modeling of the Disulfide Cross-Linking Reaction. J Phys Chem B 2020; 124:9840-9851. [PMID: 33111518 DOI: 10.1021/acs.jpcb.0c07510] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Disulfide cross-linking is one of the fundamental covalent bonds that exist prevalently in many biological molecules that is involved in versatile functional activities such as antibody stability, viral assembly, and protein folding. Additionally, it is a crucial factor in various industrial applications. Therefore, a fundamental understanding of its reaction mechanism would help gain insight into its different functional activities. Computational simulation of the disulfide cross-linking reaction with hydrogen peroxide (H2O2) was performed at the integrated quantum mechanical/molecular mechanical (QM/MM) level of theory in a water box under periodic boundary conditions. A benchmarking study for the barrier height of the disulfide formation step was performed on a model system between methanethiol and methane sulfenic acid to determine, for the QM system, the best-fit density functional theory (DFT) functional/basis set combination that produces comparable results to a higher-level theory of the coupled-cluster method. Computational results show that the disulfide cross-linking reaction with H2O2 reagent can proceed through a one-step or a two-step pathway for the high pKa cysteines or two different pathways for the low pKa cysteines to ultimately produce the sulfenic acid/sulfenate intermediate complex. Subsequently, those intermediates react with another neutral/anionic cysteine residue to form the cysteine product. In addition, the solvent-assisted proton-exchange/proton-transfer effects were examined on the energetic barriers for the different transition states, and the molecular contributions of the chemically involved water molecules were studied in detail.
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Affiliation(s)
- Muhammad A Hagras
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Michael A Bellucci
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.,XtalPi Inc., 245 Main Street, 11th Floor, Cambridge Massachusetts 02142, United States
| | - Gianpaolo Gobbo
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.,XtalPi Inc., 245 Main Street, 11th Floor, Cambridge Massachusetts 02142, United States
| | - Ryan A Marek
- MMD, Merck & Co Inc., West Point, Pennsylvania 19486, United States
| | - Bernhardt L Trout
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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Modulation of the mitochondrial voltage-dependent anion channel (VDAC) by hydrogen peroxide and its recovery by curcumin. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2020; 49:661-672. [DOI: 10.1007/s00249-020-01469-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 09/25/2020] [Accepted: 10/05/2020] [Indexed: 11/26/2022]
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Morris G, Puri BK, Olive L, Carvalho A, Berk M, Walder K, Gustad LT, Maes M. Endothelial dysfunction in neuroprogressive disorders-causes and suggested treatments. BMC Med 2020; 18:305. [PMID: 33070778 PMCID: PMC7570030 DOI: 10.1186/s12916-020-01749-w] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 08/16/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Potential routes whereby systemic inflammation, oxidative stress and mitochondrial dysfunction may drive the development of endothelial dysfunction and atherosclerosis, even in an environment of low cholesterol, are examined. MAIN TEXT Key molecular players involved in the regulation of endothelial cell function are described, including PECAM-1, VE-cadherin, VEGFRs, SFK, Rho GEF TRIO, RAC-1, ITAM, SHP-2, MAPK/ERK, STAT-3, NF-κB, PI3K/AKT, eNOS, nitric oxide, miRNAs, KLF-4 and KLF-2. The key roles of platelet activation, xanthene oxidase and myeloperoxidase in the genesis of endothelial cell dysfunction and activation are detailed. The following roles of circulating reactive oxygen species (ROS), reactive nitrogen species and pro-inflammatory cytokines in the development of endothelial cell dysfunction are then described: paracrine signalling by circulating hydrogen peroxide, inhibition of eNOS and increased levels of mitochondrial ROS, including compromised mitochondrial dynamics, loss of calcium ion homeostasis and inactivation of SIRT-1-mediated signalling pathways. Next, loss of cellular redox homeostasis is considered, including further aspects of the roles of hydrogen peroxide signalling, the pathological consequences of elevated NF-κB, compromised S-nitrosylation and the development of hypernitrosylation and increased transcription of atherogenic miRNAs. These molecular aspects are then applied to neuroprogressive disorders by considering the following potential generators of endothelial dysfunction and activation in major depressive disorder, bipolar disorder and schizophrenia: NF-κB; platelet activation; atherogenic miRs; myeloperoxidase; xanthene oxidase and uric acid; and inflammation, oxidative stress, nitrosative stress and mitochondrial dysfunction. CONCLUSIONS Finally, on the basis of the above molecular mechanisms, details are given of potential treatment options for mitigating endothelial cell dysfunction and activation in neuroprogressive disorders.
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Affiliation(s)
- Gerwyn Morris
- IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Deakin University, Geelong, Australia
| | | | - Lisa Olive
- IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Deakin University, Geelong, Australia
- School of Psychology, Faculty of Health, Deakin University, Geelong, Australia
| | - Andre Carvalho
- IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Deakin University, Geelong, Australia
- Department of Psychiatry, University of Toronto, Toronto, ON, Canada
- Centre for Addiction and Mental Health (CAMH), Toronto, ON, Canada
| | - Michael Berk
- IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Deakin University, Geelong, Australia.
- Orygen, The National Centre of Excellence in Youth Mental Health, the Department of Psychiatry and the Florey Institute for Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia.
| | - Ken Walder
- IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Deakin University, Geelong, Australia
| | - Lise Tuset Gustad
- Department of Circulation and medical imaging, Norwegian University of Technology and Science (NTNU), Trondheim, Norway
- Nord-Trøndelag Hospital Trust, Levanger Hospital, Levanger, Norway
| | - Michael Maes
- IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, Deakin University, Geelong, Australia
- Department of Psychiatry, King Chulalongkorn University Hospital, Bangkok, Thailand
- Department of Psychiatry, Medical University of Plovdiv, Plovdiv, Bulgaria
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Hu J, Tian J, Wang K, Deng J, Luo G. Reaction Pathway and Selectivity Control of Tetraethyl Thiuram Disulfide Synthesis with NaHCO 3 as a pH Regulator. ACS OMEGA 2020; 5:23736-23742. [PMID: 32984692 PMCID: PMC7513355 DOI: 10.1021/acsomega.0c02707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 08/28/2020] [Indexed: 06/11/2023]
Abstract
The selectivity of a chemical reaction is related to the effective utilization of raw materials as well as the cleanliness and economy of the process. Herein, it has been first proposed to synthesize tetraethyl thiuram disulfide (TETD) with sodium bicarbonate as the pH regulator with a reaction selectivity of ∼100%. The existence of a reaction intermediate, a sodium salt of diethyl dithiocarbamoylsulfenic acid (NaEt2DTCS), has been proved by experiments and theoretical calculations. The results indicate that TETD can not only be generated from NaEt2DTCS oxidized by H2O2 directly, but also from the conjugation of NaEt2DTC and NaEt2DTCS generated in the first stage of oxidation meanwhile. Accordingly, an oxidation reaction pathway has been proposed. The reaction selectivity with NaHCO3 or CO2 as the pH regulator has been compared, and the selectivity control mechanism is discussed. At relatively higher pH values with NaHCO3 as the pH regulator, peroxidation could be almost avoided.
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da Cruz Nizer WS, Inkovskiy V, Overhage J. Surviving Reactive Chlorine Stress: Responses of Gram-Negative Bacteria to Hypochlorous Acid. Microorganisms 2020; 8:E1220. [PMID: 32796669 PMCID: PMC7464077 DOI: 10.3390/microorganisms8081220] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 07/30/2020] [Accepted: 08/09/2020] [Indexed: 01/29/2023] Open
Abstract
Sodium hypochlorite (NaOCl) and its active ingredient, hypochlorous acid (HOCl), are the most commonly used chlorine-based disinfectants. HOCl is a fast-acting and potent antimicrobial agent that interacts with several biomolecules, such as sulfur-containing amino acids, lipids, nucleic acids, and membrane components, causing severe cellular damage. It is also produced by the immune system as a first-line of defense against invading pathogens. In this review, we summarize the adaptive responses of Gram-negative bacteria to HOCl-induced stress and highlight the role of chaperone holdases (Hsp33, RidA, Cnox, and polyP) as an immediate response to HOCl stress. We also describe the three identified transcriptional regulators (HypT, RclR, and NemR) that specifically respond to HOCl. Besides the activation of chaperones and transcriptional regulators, the formation of biofilms has been described as an important adaptive response to several stressors, including HOCl. Although the knowledge on the molecular mechanisms involved in HOCl biofilm stimulation is limited, studies have shown that HOCl induces the formation of biofilms by causing conformational changes in membrane properties, overproducing the extracellular polymeric substance (EPS) matrix, and increasing the intracellular concentration of cyclic-di-GMP. In addition, acquisition and expression of antibiotic resistance genes, secretion of virulence factors and induction of the viable but nonculturable (VBNC) state has also been described as an adaptive response to HOCl. In general, the knowledge of how bacteria respond to HOCl stress has increased over time; however, the molecular mechanisms involved in this stress response is still in its infancy. A better understanding of these mechanisms could help understand host-pathogen interactions and target specific genes and molecules to control bacterial spread and colonization.
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Affiliation(s)
| | | | - Joerg Overhage
- Department of Health Sciences, Carleton University, Ottawa, ON K1S 5B6, Canada; (W.S.d.C.N.); (V.I.)
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Díaz MG, Vega‐Hissi EG, Andrada MF, Garro Martinez JC. Scavenging of Hydrogen Peroxide by Allyl Methyl Sulfide and Diallyl Sulfide, Two Garlic Active Compounds: A Theoretical Study. ChemistrySelect 2020. [DOI: 10.1002/slct.201904725] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Mario G. Díaz
- IMIBIOCONICETFacultad de QuímicaBioquímica y FarmaciaUniversidad Nacional de San Luis Avenida Ejército de los Andes 950 5700 San Luis Argentina
| | - Esteban G. Vega‐Hissi
- IMIBIOCONICETFacultad de QuímicaBioquímica y FarmaciaUniversidad Nacional de San Luis Avenida Ejército de los Andes 950 5700 San Luis Argentina
| | - Matias F. Andrada
- Facultad de Química, Bioquímica y Farmacia, UniversidadFacultad de QuímicaBioquímica y FarmaciaUniversidad Nacional de San Luis Chacabuco 915 5700 San Luis Argentina
| | - Juan C. Garro Martinez
- IMIBIOCONICETFacultad de QuímicaBioquímica y FarmaciaUniversidad Nacional de San Luis Avenida Ejército de los Andes 950 5700 San Luis Argentina
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Mullins L, Sullivan JA. Synthesis of a Sustainable Cellulose-Derived Biofuel Through a 1-Pot, 2-Catalyst Tandem Reaction. Top Catal 2020. [DOI: 10.1007/s11244-020-01252-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Godesky MD, Shreiber DI. Hyaluronic acid-based hydrogels with independently tunable mechanical and bioactive signaling features. Biointerphases 2020; 14:061005. [PMID: 31896261 PMCID: PMC7008889 DOI: 10.1063/1.5126493] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 11/18/2019] [Accepted: 11/19/2019] [Indexed: 11/14/2022] Open
Abstract
Extracellular matrix provides critical signaling context to resident cells through mechanical and bioactive properties. To realize the potential of tissue engineering and regenerative medicine, biomaterials should allow for the independent control of these features. This study investigates a hydrogel system based on thiol-modified hyaluronic acid (HA-S) and polyethylene glycol diacrylate (PEGDA). The mechanical properties of HAS-PEGDA are dictated by two cytocompatible crosslinking reactions that occur at distinct time points: a rapid, Michael-type nucleophilic addition reaction between HA-thiols and PEG-acrylates and a prolonged maturation of disulfide crosslinks from remaining thiols. It is hypothesized that these reactions would enable the independent tuning of the mechanical and bioactive features of HAS-PEGDA. Rheological studies confirmed that initial gelation reached completion by 1 day, at which point the shear modulus was proportional to the concentration of PEGDA. Over time, the shear modulus evolved dramatically, and final stiffness depended on the availability of HA-thiols. The addition of PEG-monoacrylate (PEGMA) after the initial gelation occupied a percentage of remaining thiols to prevent disulfide crosslinking, decreasing the steady-state stiffness in a dose-dependent manner. A fraction of the PEGMA was then replaced with acrylated peptide ligands to introduce specific bioactivity to the otherwise non-cell-adhesive network. The degree of latent stiffening was controlled by the total amount of peptide-PEGMA, while adhesivity was tuned with the balance of bioactive and inactive peptides. The functional effects of the tunable mechanical and bioadhesive ligand properties were confirmed with assays of cell adhesion and morphology.
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Affiliation(s)
- Madison D Godesky
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, New Jersey 08854
| | - David I Shreiber
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, New Jersey 08854
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Bortoli M, Bruschi M, Swart M, Orian L. Sequential oxidations of phenylchalcogenides by H2O2: insights into the redox behavior of selenium via DFT analysis. NEW J CHEM 2020. [DOI: 10.1039/c9nj06449d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The biological activity of sulfur and selenium, despite their similarity, shows some remarkable differences that have been recognized in many different scenarios.
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Affiliation(s)
- Marco Bortoli
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- Via Marzolo 1
- 35131 Padova
- Italy
| | - Matteo Bruschi
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- Via Marzolo 1
- 35131 Padova
- Italy
| | - Marcel Swart
- University of Girona
- Campus Montilivi (Ciències)
- IQCC
- 17003 Girona
- Spain
| | - Laura Orian
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- Via Marzolo 1
- 35131 Padova
- Italy
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Semelak JA, Battistini F, Radi R, Trujillo M, Zeida A, Estrin DA. Multiscale Modeling of Thiol Overoxidation in Peroxiredoxins by Hydrogen Peroxide. J Chem Inf Model 2019; 60:843-853. [PMID: 31718175 DOI: 10.1021/acs.jcim.9b00817] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this work, we employ a multiscale quantum-classical mechanics (QM/MM) scheme to investigate the chemical reactivity of sulfenic acids toward hydrogen peroxide, both in aqueous solution and in the protein environment of the peroxiredoxin alkyl hydroperoxide reductase E from Mycobacterium tuberculosis (MtAhpE). The reaction of oxidation of cysteine with hydrogen peroxides, catalyzed by peroxiredoxins, is usually accelerated several orders of magnitude in comparison with the analogous reaction in solution. The resulting cysteine sulfenic acid is then reduced in other steps of the catalytic cycle, recovering the original thiol. However, under some conditions, the sulfenic acid can react with another equivalent of oxidant to form a sulfinic acid. This process is called overoxidation and has been associated with redox signaling. Herein, we employed a multiscale scheme based on density function theory calculations coupled to the classical AMBER force field, developed in our group, to establish the molecular basis of thiol overoxidation by hydrogen peroxide. Our results suggest that residues that play key catalytic roles in the oxidation of MtAhpE are not relevant in the overoxidation process. Indeed, the calculations propose that the process is unfavored by this particular enzyme microenvironment.
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Affiliation(s)
- J A Semelak
- Departamento de Química Inorgánica, Analítica y Química Física, INQUIMAE-CONICET , Facultad de Ciencias Exactas y Naturales , Ciudad Universitaria, Pab. 2 , CP 1428 , Buenos Aires , Argentina
| | - F Battistini
- Institute for Research in Biomedicine (IRB Barcelona) , The Barcelona Institute of Science and Technology , 08028 Barcelona , Spain
| | - R Radi
- Departamento de Bioquímica and Centro de Investigaciones Biomédicas (CEINBIO) , Facultad de Medicina , Av. Gral. Flores 2125 , CP 11800 Montevideo , Uruguay
| | - M Trujillo
- Departamento de Bioquímica and Centro de Investigaciones Biomédicas (CEINBIO) , Facultad de Medicina , Av. Gral. Flores 2125 , CP 11800 Montevideo , Uruguay
| | - A Zeida
- Departamento de Bioquímica and Centro de Investigaciones Biomédicas (CEINBIO) , Facultad de Medicina , Av. Gral. Flores 2125 , CP 11800 Montevideo , Uruguay
| | - D A Estrin
- Departamento de Química Inorgánica, Analítica y Química Física, INQUIMAE-CONICET , Facultad de Ciencias Exactas y Naturales , Ciudad Universitaria, Pab. 2 , CP 1428 , Buenos Aires , Argentina
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Weitekamp CA, Phelps D, Swank A, McCord J, Sobus JR, Catron T, Keely S, Brinkman N, Zurlinden T, Wheaton E, Strynar M, McQueen C, Wood CE, Tal T. Triclosan-Selected Host-Associated Microbiota Perform Xenobiotic Biotransformations in Larval Zebrafish. Toxicol Sci 2019; 172:109-122. [PMID: 31504981 PMCID: PMC10461336 DOI: 10.1093/toxsci/kfz166] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 06/17/2019] [Accepted: 07/12/2019] [Indexed: 12/26/2022] Open
Abstract
Microbiota regulate important physiologic processes during early host development. They also biotransform xenobiotics and serve as key intermediaries for chemical exposure. Antimicrobial agents in the environment may disrupt these complex interactions and alter key metabolic functions provided by host-associated microbiota. To examine the role of microbiota in xenobiotic metabolism, we exposed zebrafish larvae to the antimicrobial agent triclosan. Conventionally colonized (CC), microbe-free axenic (AX), or axenic colonized on day 1 (AC1) zebrafish were exposed to 0.16-0.30 µM triclosan or vehicle on days 1, 6, 7, 8, and 9 days post fertilization (dpf). After 6 and 10 dpf, host-associated microbial community structure and putative function were assessed by 16S rRNA gene sequencing. At 10 dpf, triclosan exposure selected for bacterial taxa, including Rheinheimera. Triclosan-selected microbes were predicted to be enriched in pathways related to mechanisms of antibiotic resistance, sulfonation, oxidative stress, and drug metabolism. Furthermore, at 10 dpf, colonized zebrafish contained 2.5-3 times more triclosan relative to AX larvae. Nontargeted chemical analysis revealed that, relative to AX larvae, both cohorts of colonized larvae showed elevations in 23 chemical features, including parent triclosan and putative triclosan sulfate. Taken together, these data suggest that triclosan exposure selects for microbes that harbor the capacity to biotransform triclosan into chemical metabolites with unknown toxicity profiles. More broadly, these data support the concept that microbiota modify the toxicokinetics of xenobiotic exposure.
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Affiliation(s)
- Chelsea A. Weitekamp
- Oak Ridge Institute for Science and Education/U.S. EPA/ORD/NHEERL/ISTD, Research Triangle Park, North Carolina, 27711
| | - Drake Phelps
- Oak Ridge Institute for Science and Education/U.S. EPA/ORD/NHEERL/ISTD, Research Triangle Park, North Carolina, 27711
| | - Adam Swank
- U.S. EPA/ORD/NHEERL/RCU, Research Triangle Park, North Carolina, 27711
| | - James McCord
- Oak Ridge Institute for Science and Education/U.S. EPA/ORD/NHEERL/ISTD, Research Triangle Park, North Carolina, 27711
| | - Jon R. Sobus
- U.S. EPA/ORD/NERL/EMMD, Research Triangle Park, North Carolina, 27711
| | - Tara Catron
- Oak Ridge Institute for Science and Education/U.S. EPA/ORD/NHEERL/ISTD, Research Triangle Park, North Carolina, 27711
| | - Scott Keely
- U.S. EPA/ORD/NERL/SED, Cincinnati, Ohio, 45220
| | | | - Todd Zurlinden
- U.S. EPA/ORD/NCCT, Research Triangle Park, North Carolina, 27711
| | | | - Mark Strynar
- U.S. EPA/ORD/NERL/EMMD, Research Triangle Park, North Carolina, 27711
| | - Charlene McQueen
- University of Arizona, Department of Pharmacology and Toxicology, Tucson, Arizona, 85721
| | - Charles E. Wood
- University of Arizona, Department of Pharmacology and Toxicology, Tucson, Arizona, 85721
| | - Tamara Tal
- U.S. EPA/ORD/NHEERL/ISTD, Research Triangle Park, North Carolina, 27711
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Kang X, Xu F, Wei X, Wang S, Zhu M. Valence self-regulation of sulfur in nanoclusters. SCIENCE ADVANCES 2019; 5:eaax7863. [PMID: 31803835 PMCID: PMC6874481 DOI: 10.1126/sciadv.aax7863] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 09/25/2019] [Indexed: 05/29/2023]
Abstract
The valence self-regulation of sulfur from the "-2" valence state in thiols to the "-1" valence state in hydroxylated thiolates has been accomplished using the Pt1Ag28 nanocluster as a platform-the first time that the "-1" valent sulfur has been detected as S-1. Two previously unknown nanoclusters, Pt1Ag28(SR)20 and Pt1Ag28(SR)18(HO-SR)2 (where SR represents 2-adamantanethiol), have been synthesized and characterized-in the latter nanocluster, the presence of hydroxyl induces the valence regulation of two special S atoms from "-2" (in SR) to "-1" valence state in the HO-S(Ag)R. Because of the contrasting nature of the capping ligands in these two nanoclusters [i.e., only SR in Pt1Ag28(SR)20 or both SR- and HO-SR- in Pt1Ag28(SR)18(HO-SR)2], they exhibit differing shell architectures, even though their cores (Pt1Ag12) are in the same icosahedral configuration. Single-crystal x-ray diffraction analysis revealed their 1:1 cocrystallization, and mass spectrometry verified the presence of hydroxyls on Pt1Ag28(SR)18(HO-SR)2.
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Fan B, Men Y, Rossum SAP, Li G, Eelkema R. A Fuel‐Driven Chemical Reaction Network Based on Conjugate Addition and Elimination Chemistry. CHEMSYSTEMSCHEM 2019. [DOI: 10.1002/syst.201900028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Bowen Fan
- Department of Chemical Engineering, Faculty of Applied SciencesDelft University of Technology Van der Maasweg 9 2629 HZ Delft The Netherlands
| | - Yongjun Men
- Department of Chemical Engineering, Faculty of Applied SciencesDelft University of Technology Van der Maasweg 9 2629 HZ Delft The Netherlands
| | - Susan A. P. Rossum
- Department of Chemical Engineering, Faculty of Applied SciencesDelft University of Technology Van der Maasweg 9 2629 HZ Delft The Netherlands
| | - Guotai Li
- Department of Chemical Engineering, Faculty of Applied SciencesDelft University of Technology Van der Maasweg 9 2629 HZ Delft The Netherlands
| | - Rienk Eelkema
- Department of Chemical Engineering, Faculty of Applied SciencesDelft University of Technology Van der Maasweg 9 2629 HZ Delft The Netherlands
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Sarngadharan SC, Mohammed F, Conley M, Eldridge H, Anwar Y, Nursey D, Faris J, Malone M, Cogen JM, Chaudhary BI, Eckert CA, Pollet P, Liotta CL. “110th Anniversary:” Interactions of Bis(1-methyl-1-phenylethyl) Peroxide with the Secondary Antioxidant Bis(octadecyloxycarbonylethyl) Sulfide: Mechanistic Studies Conducted in Dodecane as a Model System for Polyethylene. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b02344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sarath C. Sarngadharan
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 911 Atlantic Drive, Atlanta, Georgia 30332, United States
| | - Fiaz Mohammed
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
- Specialty Separations Center, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
| | - Mark Conley
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
- Specialty Separations Center, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
| | - Harris Eldridge
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
| | - Yusra Anwar
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
| | - Derek Nursey
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
| | - Jonathan Faris
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
| | - Maryellen Malone
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
| | - Jeffrey M. Cogen
- Dow, Inc., 400 Arcola Road, Collegeville, Pennsylvania 19426, United States
| | | | - Charles A. Eckert
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 911 Atlantic Drive, Atlanta, Georgia 30332, United States
- Specialty Separations Center, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
| | - Pamela Pollet
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 911 Atlantic Drive, Atlanta, Georgia 30332, United States
- Specialty Separations Center, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
| | - Charles L. Liotta
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 911 Atlantic Drive, Atlanta, Georgia 30332, United States
- Specialty Separations Center, Georgia Institute of Technology, 311 Ferst Street, Atlanta, Georgia 30332-0100, United States
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Spisz P, Zdrowowicz M, Makurat S, Kozak W, Skotnicki K, Bobrowski K, Rak J. Why Does the Type of Halogen Atom Matter for the Radiosensitizing Properties of 5-Halogen Substituted 4-Thio-2'-Deoxyuridines? Molecules 2019; 24:E2819. [PMID: 31382376 PMCID: PMC6695862 DOI: 10.3390/molecules24152819] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 07/30/2019] [Accepted: 07/31/2019] [Indexed: 01/06/2023] Open
Abstract
Radiosensitizing properties of substituted uridines are of great importance for radiotherapy. Very recently, we confirmed 5-iodo-4-thio-2'-deoxyuridine (ISdU) as an efficient agent, increasing the extent of tumor cell killing with ionizing radiation. To our surprise, a similar derivative of 4-thio-2'-deoxyuridine, 5-bromo-4-thio-2'-deoxyuridine (BrSdU), does not show radiosensitizing properties at all. In order to explain this remarkable difference, we carried out a radiolytic (stationary and pulse) and quantum chemical studies, which allowed the pathways to all radioproducts to be rationalized. In contrast to ISdU solutions, where radiolysis leads to 4-thio-2'-deoxyuridine and its dimer, no dissociative electron attachment (DEA) products were observed for BrSdU. This observation seems to explain the lack of radiosensitizing properties of BrSdU since the efficient formation of the uridine-5-yl radical, induced by electron attachment to the modified nucleoside, is suggested to be an indispensable attribute of radiosensitizing uridines. A larger activation barrier for DEA in BrSdU, as compared to ISdU, is probably responsible for the closure of DEA channel in the former system. Indeed, besides DEA, the XSdU anions may undergo competitive protonation, which makes the release of X- kinetically forbidden.
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Affiliation(s)
- Paulina Spisz
- Laboratory of Biological Sensitizers, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Magdalena Zdrowowicz
- Laboratory of Biological Sensitizers, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Samanta Makurat
- Laboratory of Biological Sensitizers, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Witold Kozak
- Laboratory of Biological Sensitizers, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Konrad Skotnicki
- Centre of Radiation Research and Technology, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland
| | - Krzysztof Bobrowski
- Centre of Radiation Research and Technology, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland
| | - Janusz Rak
- Laboratory of Biological Sensitizers, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
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High-pressure homogenization combined with sulfhydryl blockage by hydrogen peroxide enhance the thermal stability of chicken breast myofibrillar protein aqueous solution. Food Chem 2019; 285:31-38. [DOI: 10.1016/j.foodchem.2019.01.131] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 12/24/2018] [Accepted: 01/19/2019] [Indexed: 11/18/2022]
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Bedoya-Medina J, Mendivil-Perez M, Rey-Suarez P, Jimenez-Del-Rio M, Núñez V, Velez-Pardo C. L-amino acid oxidase isolated from Micrurus mipartitus snake venom (MipLAAO) specifically induces apoptosis in acute lymphoblastic leukemia cells mostly via oxidative stress-dependent signaling mechanism. Int J Biol Macromol 2019; 134:1052-1062. [PMID: 31129208 DOI: 10.1016/j.ijbiomac.2019.05.174] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 05/06/2019] [Accepted: 05/14/2019] [Indexed: 12/27/2022]
Abstract
The effect of Micrurus mipartitus snake venom as a therapeutic alternative for T-acute lymphoblastic leukemia (ALL) is still unknown. This study was aimed to evaluate the cytotoxic effect of M. mipartitus snake venom and a new L-amino acid oxidase (LAAO), named MipLAAO, on human peripheral blood lymphocytes (PBL) and on T-ALL cells (Jurkat), and its mechanism of action. PBL and Jurkat cells were treated with venom and MipLAAO, and morphological changes in the cell nucleus/DNA, mitochondrial membrane potential, levels of intracellular reactive oxygen species and cellular apoptosis markers were determined by fluorescence microscopy, flow cytometry and pharmacological inhibition. Venom and MipLAAO induced apoptotic cell death in Jurkat cells, but not in PBL, in a dose-response manner. Additionally, venom and MipLAAO increased dichlorofluorescein fluorescence intensity, indicative of H2O2 production, increased DJ-1 Cys106-sulfonate, as a marker of intracellular stress and induced the up-regulation of PUMA, p53 and phosphorylation of c-JUN. Additionally, it increased the expression of apoptotic CASPASE-3. In conclusion, M. mipartitus venom and MipLAAO selectively induces apoptosis in Jurkat cells through a H2O2-mediated signaling pathway dependent mostly on CASPASE-3 pathway. Our findings support the potential use of M. mipartitus snake venom compounds as a potential treatment for T-ALL.
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Affiliation(s)
- Jesus Bedoya-Medina
- Programa de Ofidismo y Escorpionismo, Universidad de Antioquia, Medellín, Colombia
| | - Miguel Mendivil-Perez
- Grupo de Neurociencias, Instituto de Investigaciones Médicas, Facultad de Medicina, Universidad de Antioquia (UdeA), Calle 70 No. 52-21, and Calle 62 # 52-59, bloque 1, laboratorio 412, SIU, Medellín, Colombia
| | - Paola Rey-Suarez
- Programa de Ofidismo y Escorpionismo, Universidad de Antioquia, Medellín, Colombia
| | - Marlene Jimenez-Del-Rio
- Grupo de Neurociencias, Instituto de Investigaciones Médicas, Facultad de Medicina, Universidad de Antioquia (UdeA), Calle 70 No. 52-21, and Calle 62 # 52-59, bloque 1, laboratorio 412, SIU, Medellín, Colombia
| | - Vitelbina Núñez
- Programa de Ofidismo y Escorpionismo, Universidad de Antioquia, Medellín, Colombia; Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia
| | - Carlos Velez-Pardo
- Grupo de Neurociencias, Instituto de Investigaciones Médicas, Facultad de Medicina, Universidad de Antioquia (UdeA), Calle 70 No. 52-21, and Calle 62 # 52-59, bloque 1, laboratorio 412, SIU, Medellín, Colombia.
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Schwan AL, Michalski MM, Findlay JP. Origins and applications of stereoselective sulfenate anion alkylation reactions. PHOSPHORUS SULFUR 2019. [DOI: 10.1080/10426507.2019.1603703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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46
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Makurat S, Spisz P, Kozak W, Rak J, Zdrowowicz M. 5-Iodo-4-thio-2'-Deoxyuridine as a Sensitizer of X-ray Induced Cancer Cell Killing. Int J Mol Sci 2019; 20:E1308. [PMID: 30875879 PMCID: PMC6470520 DOI: 10.3390/ijms20061308] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 03/12/2019] [Indexed: 12/21/2022] Open
Abstract
Nucleosides, especially pyrimidines modified in the C5-position, can act as radiosensitizers via a mechanism that involves their enzymatic triphosphorylation, incorporation into DNA, and a subsequent dissociative electron attachment (DEA) process. In this paper, we report 5-iodo-4-thio-2'-deoxyuridine (ISdU) as a compound that can effectively lead to ionizing radiation (IR)-induced cellular death, which is proven by a clonogenic assay. The test revealed that the survival of cells, pre-treated with 10 or 100 µM solution of ISdU and exposed to 0.5 Gy of IR, was reduced from 78.4% (for non-treated culture) to 67.7% and to 59.8%, respectively. For a somewhat higher dose of 1 Gy, the surviving fraction was reduced from 68.2% to 54.9% and to 40.8% for incubation with 10 or 100 µM ISdU, respectively. The cytometric analysis of histone H2A.X phosphorylation showed that the radiosensitizing effect of ISdU was associated, at least in part, with the formation of double-strand breaks. Moreover, the cytotoxic test against the MCF-7 breast cancer cell line and human dermal fibroblasts (HDFa line) confirmed low cytotoxic activity of ISdU. Based on the results of steady state radiolysis of ISdU with a dose of 140 Gy and quantum chemical calculations explaining the origin of the MS detected radioproducts, the molecular mechanism of sensitization by ISdU was proposed. In conclusion, we found ISdU to be a potential radiosensitizer that could improve anticancer radiotherapy.
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Affiliation(s)
- Samanta Makurat
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Paulina Spisz
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Witold Kozak
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Janusz Rak
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Magdalena Zdrowowicz
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
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Frank P, Sarangi R, Hedman B, Hodgson KO. Synchrotron X-radiolysis of l-cysteine at the sulfur K-edge: Sulfurous products, experimental surprises, and dioxygen as an oxidoreductant. J Chem Phys 2019; 150:105101. [PMID: 30876351 PMCID: PMC7791807 DOI: 10.1063/1.5079419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 02/12/2019] [Indexed: 11/14/2022] Open
Abstract
In situ inventory of sulfurous products from the sulfur K-edge synchrotron X-radiolysis of l-cysteine in solid-phase and anaerobic (pH 5) and air-saturated (pH 5, 7, and 9) solutions without and with 40% glycerol is reported. Sequential K-edge X-ray Absorption Spectroscopic (XAS) spectra were acquired. l-cysteine degraded systematically in the X-ray beam. Radiolytic products were inventoried by fits using the XAS spectra of sulfur model compounds. Solid l-cysteine declined to 92% fraction after a single K-edge XAS scan. After six scans, 60% remained, accompanied by 14% cystine, 16% thioether, 5.4% elemental sulfur, and smaller fractions of more highly oxidized products. In air-saturated pH 5 solution, 73% of l-cysteine remained after ten scans, with 2% cystine and 19% elemental sulfur. Oxidation increased with 40% glycerol, yielding 67%, 5%, and 23% fractions, respectively, after ten scans. Higher pH solutions exhibited less radiolytic chemistry. All the reactivity followed first-order kinetics. The anaerobic experiment displayed two reaction phases, with sharp changes in kinetics and radiolytic chemistry. Unexpectedly, the radiolytic oxidation of l-cysteine was increased in anaerobic solution. After ten scans, only 60% of the l-cysteine remained, along with 17% cystine, 22% elemental sulfur, and traces of more highly oxidized products. A new aerobic reaction cycle is hypothesized, wherein dissolved dioxygen captures radiolytic H• or eaq -, enters HO2 •/O2 •-, reductively quenches cysteine thiyl radicals, and cycles back to O2. This cycle is suggested to suppress the radiolytic production of cystine in aerobic solution.
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Affiliation(s)
- Patrick Frank
- Author to whom correspondence should be addressed: . Tel.: 650-723-2479
| | - Ritimukta Sarangi
- Stanford Synchrotron Radiation Lightsource, SLAC, Stanford University, Menlo Park, California 94025, USA
| | - Britt Hedman
- Stanford Synchrotron Radiation Lightsource, SLAC, Stanford University, Menlo Park, California 94025, USA
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48
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Computational study of the hydrogen peroxide scavenging mechanism of allyl methyl disulfide, an antioxidant compound from garlic. Mol Divers 2019; 23:985-995. [DOI: 10.1007/s11030-019-09927-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 02/06/2019] [Indexed: 12/18/2022]
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49
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Schwan AL. A Computational Determination of the Origins of Diastereoselective Alkylations of a Cysteinesulfenate Anion. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Adrian L. Schwan
- Department of Chemistry; University of Guelph; N1G 2W1 Guelph ON Canada
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50
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Abstract
The concept of cell signaling in the context of nonenzyme-assisted protein modifications by reactive electrophilic and oxidative species, broadly known as redox signaling, is a uniquely complex topic that has been approached from numerous different and multidisciplinary angles. Our Review reflects on five aspects critical for understanding how nature harnesses these noncanonical post-translational modifications to coordinate distinct cellular activities: (1) specific players and their generation, (2) physicochemical properties, (3) mechanisms of action, (4) methods of interrogation, and (5) functional roles in health and disease. Emphasis is primarily placed on the latest progress in the field, but several aspects of classical work likely forgotten/lost are also recollected. For researchers with interests in getting into the field, our Review is anticipated to function as a primer. For the expert, we aim to stimulate thought and discussion about fundamentals of redox signaling mechanisms and nuances of specificity/selectivity and timing in this sophisticated yet fascinating arena at the crossroads of chemistry and biology.
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Affiliation(s)
- Saba Parvez
- Department of Pharmacology and Toxicology, College of
Pharmacy, University of Utah, Salt Lake City, Utah, 84112, USA
- Department of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York, 14853, USA
| | - Marcus J. C. Long
- Department of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York, 14853, USA
| | - Jesse R. Poganik
- Ecole Polytechnique Fédérale de Lausanne,
Institute of Chemical Sciences and Engineering, 1015, Lausanne, Switzerland
- Department of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York, 14853, USA
| | - Yimon Aye
- Ecole Polytechnique Fédérale de Lausanne,
Institute of Chemical Sciences and Engineering, 1015, Lausanne, Switzerland
- Department of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York, 14853, USA
- Department of Biochemistry, Weill Cornell Medicine, New
York, New York, 10065, USA
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