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Walter ED, Schwarz KC, Kumar SA, Chen Y, Sassi M, Wang Z, Rosso KM. Evolution of Radicals from the Photolysis of High Ionic Strength Alkaline Nitrite Solutions. J Phys Chem A 2020; 124:3019-3025. [PMID: 32223163 DOI: 10.1021/acs.jpca.9b11438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reactive nitrogen species (RNS), along with reactive oxygen species (ROS), are significant products from radiolysis in solution. While much research has been focused on biological systems, these species are also important products in the autoradiolysis that occurs in nuclear waste. Here, we determine the correlation between solution constituents, particularly nitrite, and radical products in highly alkaline solutions relevant to liquid waste. Because these radicals tend to be very short-lived, we employ spin trapping in conjunction with electron paramagnetic resonance (EPR) to detect them and quantify their production. Most spin traps do not function in these conditions (>1 M NaOH); however, nitroalkanes such as nitromethane will act as spin traps in their aci form, which is dominant at high pH. To restrict the products to those originating from nitrite, we use 280-480 nm UV light to generate radicals, avoiding products from the photolysis of water. Under these circumstances, nitric oxide, nitrite radicals, and hydroxyl radicals are detected, and the trends with the concentration of the constituents of the solutions are tracked. These include nitrite, nitrate, hydroxide, and carbonate. We find that, while the equilibrium shifts with increasing pH from hydroxyl radicals to the more slowly reacting oxide radicals, the production of nitrite radicals does not decrease.
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Affiliation(s)
- Eric D Walter
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Kaitlynn C Schwarz
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Shweta Anil Kumar
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Ying Chen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Michel Sassi
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Zheming Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Kevin M Rosso
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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2
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Barriga-González G, Aliaga C, Chamorro E, Olea-Azar C, Norambuena E, Porcal W, González M, Cerecetto H. Synthesis and evaluation of new heteroaryl nitrones with spin trap properties. RSC Adv 2020; 10:40127-40135. [PMID: 35520832 PMCID: PMC9057510 DOI: 10.1039/d0ra07720h] [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: 09/09/2020] [Accepted: 10/09/2020] [Indexed: 12/03/2022] Open
Abstract
A new series of heteroaryl nitrones were synthesized and evaluated as free radical traps due to the results showed in our previous report. The physicochemical characterization of these new nitrones by electron spin resonance (ESR) demonstrated their high capability to trap and stabilize different atom centered free radicals generated by the Fenton reaction. Additionally, we intensely studied them in terms of their physicochemical properties. Kinetic studies, including the use of a method based on competition and the hydroxyl adduct decay, gave the corresponding rate constants and half-lives at the physiological pH of these newly synthesized nitrones. New nitrones derived from quinoxaline 1,4-dioxide heterocycles were more suitable than DMPO to trap hydroxyl free radicals with a half-life longer than two hours. We explain some of the results using computational chemistry through density functional theory (DFT). A new series of heteroaryl nitrones were synthesized and evaluated as free radical traps due to the results showed in our previous report.![]()
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Affiliation(s)
- G. Barriga-González
- Departamento de Química
- Facultad de Ciencias Básicas
- Universidad Metropolitana de Ciencias de la Educación
- Santiago
- Chile
| | - C. Aliaga
- Facultad de Química y Biología
- Universidad de Santiago de Chile
- Santiago
- Chile
- Centro para el Desarrollo de la Nanociencia y la Nanotecnología, CEDENNA
| | - E. Chamorro
- Departamento de Ciencias Químicas
- Facultad de Ciencias Exactas
- Universidad Andrés Bello
- 8370146 Santiago
- Chile
| | - C. Olea-Azar
- Departamento de Química Inorgánica y Analítica
- Facultad de Ciencias Químicas y Farmacéuticas
- Universidad de Chile
- Santiago
- Chile
| | - E. Norambuena
- Departamento de Química
- Facultad de Ciencias Básicas
- Universidad Metropolitana de Ciencias de la Educación
- Santiago
- Chile
| | - W. Porcal
- Grupo de Química Orgánica Medicinal
- Laboratorio de Química Orgánica
- Facultad de Ciencias/Facultad de Química
- Universidad de la República
- Montevideo
| | - M. González
- Grupo de Química Orgánica Medicinal
- Laboratorio de Química Orgánica
- Facultad de Ciencias/Facultad de Química
- Universidad de la República
- Montevideo
| | - H. Cerecetto
- Grupo de Química Orgánica Medicinal
- Laboratorio de Química Orgánica
- Facultad de Ciencias/Facultad de Química
- Universidad de la República
- Montevideo
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3
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Huang YY, Rajda PJ, Szewczyk G, Bhayana B, Chiang LY, Sarna T, Hamblin MR. Sodium nitrite potentiates antimicrobial photodynamic inactivation: possible involvement of peroxynitrate. Photochem Photobiol Sci 2019; 18:505-515. [PMID: 30534721 DOI: 10.1039/c8pp00452h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We have recently shown that a wide range of different inorganic salts can potentiate antimicrobial photodynamic inactivation (aPDI) and TiO2-mediated antimicrobial photocatalysis. Potentiation has been shown with azide, bromide, thiocyanate, selenocyanate, and most strongly, with iodide. Here we show that sodium nitrite can also potentiate broad-spectrum aPDI killing of Gram-positive MRSA and Gram-negative Escherichia coli bacteria. Literature reports have previously shown that two photosensitizers (PS), methylene blue (MB) and riboflavin, when excited by broad-band light in the presence of nitrite could lead to tyrosine nitration. Addition of up to 100 mM nitrite gave 6 logs of extra killing in the case of Rose Bengal excited by green light against E. coli, and 2 logs of extra killing against MRSA (eradication in both cases). Comparable results were obtained for other PS (TPPS4 + blue light and MB + red light). Some bacterial killing was obtained when bacteria were added after light using a functionalized fullerene (LC15) + nitrite + blue light, and tyrosine ester amide was nitrated using both "in" and "after" modes with all four PS. The mechanism could involve formation of peroxynitrate by a reaction between superoxide radicals and nitrogen dioxide radicals; formation of the latter species was demonstrated by spin trapping with nitromethane.
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Affiliation(s)
- Ying-Ying Huang
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, 02114, USA.,Department of Dermatology, Harvard Medical School, Boston, MA, 02115, USA
| | - Paweł J Rajda
- Faculty of Computer Science, Electronics and Telecommunications, AGH University of Science and Technology, Krakow, Poland
| | - Grzegorz Szewczyk
- Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Brijesh Bhayana
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - Long Y Chiang
- Department of Chemistry, University of Massachusetts Lowell, Lowell, MA, 01854, USA
| | - Tadeusz Sarna
- Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Michael R Hamblin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, 02114, USA. .,Department of Dermatology, Harvard Medical School, Boston, MA, 02115, USA. .,Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, 02139, USA.
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4
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Venpin WKPF, Kennedy EM, Mackie JC, Dlugogorski BZ. Mechanistic Study of Trapping of NO by 3,5-Dibromo-4-Nitrosobenzene Sulfonate. Ind Eng Chem Res 2012. [DOI: 10.1021/ie302125x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Wendy K. P. F. Venpin
- Process Safety and Environment Protection Research Group, School
of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Eric M. Kennedy
- Process Safety and Environment Protection Research Group, School
of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - John C. Mackie
- Process Safety and Environment Protection Research Group, School
of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
- School of Chemistry, The University of Sydney, NSW 2006, Australia
| | - Bogdan Z. Dlugogorski
- Process Safety and Environment Protection Research Group, School
of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
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Morakinyo MK, Chipinda I, Hettick J, Siegel PD, Abramson J, Strongin R, Martincigh BS, Simoyi RH. Detailed mechanistic investigation into the S-nitrosation of cysteamine. CAN J CHEM 2012; 9:724-738. [PMID: 26594054 DOI: 10.1139/v2012-051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The nitrosation of cysteamine (H2NCH2CH2SH) to produce cysteamine-S-nitrosothiol (CANO) was studied in slightly acidic medium by using nitrous acid prepared in situ. The stoichiometry of the reaction was H2NCH2CH2SH + HNO2 → H2NCH2CH2SNO + H2O. On prolonged standing, the nitrosothiol decomposed quantitatively to yield the disulfide, cystamine: 2H2NCH2CH2SNO → H2NCH2CH2S-SCH2CH2NH2 + 2NO. NO2 and N2O3 are not the primary nitrosating agents, since their precursor (NO) was not detected during the nitrosation process. The reaction is first order in nitrous acid, thus implicating it as the major nitrosating agent in mildly acidic pH conditions. Acid catalyzes nitrosation after nitrous acid has saturated, implicating the protonated nitrous acid species, the nitrosonium cation (NO+) as a contributing nitrosating species in highly acidic environments. The acid catalysis at constant nitrous acid concentrations suggests that the nitrosonium cation nitrosates at a much higher rate than nitrous acid. Bimolecular rate constants for the nitrosation of cysteamine by nitrous acid and by the nitrosonium cation were deduced to be 17.9 ± 1.5 (mol/L)-1 s-1 and 6.7 × 104 (mol/L)-1 s-1, respectively. Both Cu(I) and Cu(II) ions were effective catalysts for the formation and decomposition of the cysteamine nitrosothiol. Cu(II) ions could catalyze the nitrosation of cysteamine in neutral conditions, whereas Cu(I) could only catalyze in acidic conditions. Transnitrosation kinetics of CANO with glutathione showed the formation of cystamine and the mixed disulfide with no formation of oxidized glutathione (GSSG). The nitrosation reaction was satisfactorily simulated by a simple reaction scheme involving eight reactions.
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Affiliation(s)
- Moshood K Morakinyo
- Department of Chemistry, Portland State University, Portland, OR 97207-0751, USA
| | - Itai Chipinda
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute of Occupational Safety and Health, Centers for Disease Control and Prevention, 1095 Willowdale Road, Morgantown, WV 26505, USA
| | - Justin Hettick
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute of Occupational Safety and Health, Centers for Disease Control and Prevention, 1095 Willowdale Road, Morgantown, WV 26505, USA
| | - Paul D Siegel
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute of Occupational Safety and Health, Centers for Disease Control and Prevention, 1095 Willowdale Road, Morgantown, WV 26505, USA
| | - Jonathan Abramson
- Department of Physics, Portland State University, Portland, OR 97207-0751, USA
| | - Robert Strongin
- Department of Chemistry, Portland State University, Portland, OR 97207-0751, USA
| | - Bice S Martincigh
- School of Chemistry, University of KwaZulu-Natal Westville Campus, Private Bag X54001, Durban 4000, Republic of South Africa
| | - Reuben H Simoyi
- Department of Chemistry, Portland State University, Portland, OR 97207-0751, USA; School of Chemistry, University of KwaZulu-Natal Westville Campus, Private Bag X54001, Durban 4000, Republic of South Africa
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6
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Staško A, Bella M, Rimarčík J, Barbieriková Z, Milata V, Lukeš V, Brezová V. Photoinduced decarboxylation of 9-oxo-6,9-dihydro[1,2,5]selenadiazolo[3,4-f
]quinoline-8-carboxylic acid. J PHYS ORG CHEM 2011. [DOI: 10.1002/poc.1955] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Andrej Staško
- Institute of Physical Chemistry and Chemical Physics; Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava; Radlinského 9 SK-812 37 Bratislava Slovak Republic
| | - Maroš Bella
- Institute of Organic Chemistry, Catalysis and Petrochemistry; Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava; Radlinského 9 SK-812 37 Bratislava Slovak Republic
| | - Ján Rimarčík
- Institute of Physical Chemistry and Chemical Physics; Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava; Radlinského 9 SK-812 37 Bratislava Slovak Republic
| | - Zuzana Barbieriková
- Institute of Physical Chemistry and Chemical Physics; Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava; Radlinského 9 SK-812 37 Bratislava Slovak Republic
| | - Viktor Milata
- Institute of Organic Chemistry, Catalysis and Petrochemistry; Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava; Radlinského 9 SK-812 37 Bratislava Slovak Republic
| | - Vladimír Lukeš
- Institute of Physical Chemistry and Chemical Physics; Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava; Radlinského 9 SK-812 37 Bratislava Slovak Republic
| | - Vlasta Brezová
- Institute of Physical Chemistry and Chemical Physics; Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava; Radlinského 9 SK-812 37 Bratislava Slovak Republic
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7
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Morakinyo MK, Strongin RM, Simoyi RH. Modulation of homocysteine toxicity by S-nitrosothiol formation: a mechanistic approach. J Phys Chem B 2011; 114:9894-904. [PMID: 20666529 DOI: 10.1021/jp103679v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The metabolic conversion of homocysteine (HCYSH) to homocysteine thiolactone (HTL) has been reported as the major cause of HCYSH pathogenesis. It was hypothesized that inhibition of the thiol group of HCYSH by S-nitrosation will prevent its metabolic conversion to HTL. The kinetics, reaction dynamics, and mechanism of reaction of HCYSH and nitrous acid to produce S-nitrosohomocysteine (HCYSNO) was studied in mildly to highly acidic pHs. Transnitrosation of this non-protein-forming amino acid by S-nitrosoglutathione (GSNO) was also studied at physiological pH 7.4 in phosphate buffer. In both cases, HCYSNO formed quantitatively. Copper ions were found to play dual roles, catalyzing the rate of formation of HCYSNO as well as its rate of decomposition. In the presence of a transition-metal ions chelator, HCYSNO was very stable with a half-life of 198 h at pH 7.4. Nitrosation by nitrous acid occurred via the formation of more powerful nitrosating agents, nitrosonium cation (NO(+)) and dinitrogen trioxide (N(2)O(3)). In highly acidic environments, NO(+) was found to be the most effective nitrosating agent with a first-order dependence on nitrous acid. N(2)O(3) was the most relevant nitrosating agent in a mildly acidic environment with a second-order dependence on nitrous acid. The bimolecular rate constants for the direct reactions of HCYSH and nitrous acid, N(2)O(3), and NO(+) were 9.0 x 10(-2), 9.50 x 10(3), and 6.57 x 10(10) M(-1) s(-1), respectively. These rate constant values agreed with the electrophilic order of these nitrosating agents: HNO(2) < N(2)O(3) < NO(+). Transnitrosation of HCYSH by GSNO produced HCYSNO and other products including glutathione (reduced and oxidized) and homocysteine-glutathione mixed disulfide. A computer modeling involving eight reactions gave a good fit to the observed formation kinetics of HCYSNO. This study has shown that it is possible to modulate homocysteine toxicity by preventing its conversion to a more toxic HTL by S-nitrosation.
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Affiliation(s)
- Moshood K Morakinyo
- Department of Chemistry, Portland State University, Portland, Oregon 97207-0751, USA
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8
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Gbabode G, Lambert S, Guillet F, Hebert P. Structural Transition of the 2-Nitropropane Organic Compound at Low Temperature. PROPELLANTS EXPLOSIVES PYROTECHNICS 2010. [DOI: 10.1002/prep.200800108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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9
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Hong H, Sun J, Cai W. Multimodality imaging of nitric oxide and nitric oxide synthases. Free Radic Biol Med 2009; 47:684-98. [PMID: 19524664 DOI: 10.1016/j.freeradbiomed.2009.06.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Revised: 05/28/2009] [Accepted: 06/10/2009] [Indexed: 01/27/2023]
Abstract
Nitric oxide (NO) and NO synthases (NOSs) are crucial factors in many pathophysiological processes such as inflammation, vascular/neurological function, and many types of cancer. Noninvasive imaging of NO or NOS can provide new insights in understanding these diseases and facilitate the development of novel therapeutic strategies. In this review, we will summarize the current state-of-the-art multimodality imaging in detecting NO and NOSs, including optical (fluorescence, chemiluminescence, and bioluminescence), electron paramagnetic resonance (EPR), magnetic resonance (MR), and positron emission tomography (PET). With continued effort over the last several years, these noninvasive imaging techniques can now reveal the biodistribution of NO or NOS in living subjects with high fidelity which will greatly facilitate scientists/clinicians in the development of new drugs and/or patient management. Lastly, we will also discuss future directions/applications of NO/NOS imaging. Successful development of novel NO/NOS imaging agents with optimal in vivo stability and desirable pharmacokinetics for clinical translation will enable the maximum benefit in patient management.
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Affiliation(s)
- Hao Hong
- Department of Radiology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin 53705-2275, USA
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Kleschyov AL, Wenzel P, Munzel T. Electron paramagnetic resonance (EPR) spin trapping of biological nitric oxide. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 851:12-20. [PMID: 17070113 DOI: 10.1016/j.jchromb.2006.10.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Revised: 10/05/2006] [Accepted: 10/06/2006] [Indexed: 10/24/2022]
Abstract
Nitric oxide (NO) is a free radical species with multiple physiological functions. Because of low concentrations and short half-life of NO, its direct measurement in living tissues remains a difficult task. Electron paramagnetic resonance (EPR) spin trapping is probably one of the best suitable platforms for development of new methods for quantification of biological NO. The most reliable EPR-based approaches developed so far are based on the reaction of NO with various iron complexes, both intrinsic and exogenously applied. This review is focused on the current state and perspectives of EPR spin trapping for experimental and clinical NO biology.
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Affiliation(s)
- Andrei L Kleschyov
- Second Department of Medicine, Johannes Gutenberg University of Mainz, Mainz 55131, Germany.
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