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Chen J, Cui Y, Wu P, Dassanayake R, Yu P, Fu K, Sun Z, Liu Y, Zhou Y. Nitroxyl donating and visualization with a coumarin-based fluorescence probe. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 316:124317. [PMID: 38692102 DOI: 10.1016/j.saa.2024.124317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 03/27/2024] [Accepted: 04/18/2024] [Indexed: 05/03/2024]
Abstract
Nitroxyl (HNO), the single-electron reduction product of nitric oxide (NO), has attracted great interest in the treatment of congestive heart failure in clinical trials. In this paper, we describe the first coumarin-based compound N-hydroxy-2-oxo-2H-chromene-6-sulfonamide (CD1) as a dualfunctional HNO donor, which can release both an HNO signaling molecule and a fluorescent reporter. Under physiological conditions (pH 7.4 and 37 °C), the CD1 HNO donor can readily decompose with a half-life of ∼90 min. The corresponding stoichiometry HNO from the CD1 donor was confirmed using both Vitamin B12 and phosphine compound traps. In addition to HNO releasing, specifically, the degradation product 2-oxo-2H-chromene-6-sulfinate (CS1) was generated as a fluorescent marker during the decomposition. Therefore, the HNO amount released in situ can be accurately monitored through fluorescence generation. As compared to the CD1 donor, the fluorescence intensity increased by about 4.9-fold. The concentration limit of detection of HNO releasing was determined to be ∼0.13 μM according to the fluorescence generation of CS1 at physiological conditions. Moreover, the bioimaging of the CD1 donor was demonstrated in the cell culture of HeLa cells, where the intracellular fluorescence signals were observed, inferring the site of HNO release. Finally, we anticipate that this novel coumarin-based CD1 donor opens a new platform for exploring the biology of HNO.
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Affiliation(s)
- Jiajun Chen
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education and School of Chemical Engineering and Technology, Hainan University, Haikou, Hainan 570228, China
| | - Yunxi Cui
- College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Peixuan Wu
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education and School of Chemical Engineering and Technology, Hainan University, Haikou, Hainan 570228, China
| | - Rohan Dassanayake
- Department of Biosystems Technology, Faculty of Technology, University of Sri Jayewardenepura, Pitipana, Homagama 10200, Sri Lanka
| | - Peng Yu
- Department of Joint Surgery, The First Affiliated Hospital of Hainan Medical University, Haikou 570102, China
| | - Kun Fu
- Department of Joint Surgery, The First Affiliated Hospital of Hainan Medical University, Haikou 570102, China
| | - Zhicheng Sun
- Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing 102600, China
| | - Yuanyuan Liu
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education and School of Chemical Engineering and Technology, Hainan University, Haikou, Hainan 570228, China
| | - Yang Zhou
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education and School of Chemical Engineering and Technology, Hainan University, Haikou, Hainan 570228, China.
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2
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Zhou Y, Chen J, Cui Y, Tang L, Wu P, Yu P, Fu K, Sun Z, Liu Y. Azobenzene-based colorimetric and fluorometric chemosensor for nitroxyl releasing. Nitric Oxide 2024; 145:49-56. [PMID: 38364967 DOI: 10.1016/j.niox.2024.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 01/29/2024] [Accepted: 02/13/2024] [Indexed: 02/18/2024]
Abstract
The precise release and characterization of nitroxyl (HNO) gas signaling molecule remain a challenge due to its short lifetime to date. To solve this issue, an azobenzene-based HNO donor (Azo-D1) was proposed as a colorimetric and fluorometric chemosensor for HNO releasing, to release both HNO and an azobenzene fluorescent reporter together. Specifically, the Azo-D1 has an HNO release half-life of ∼68 min under physiological conditions. The characteristic color change from the original orange to the yellow color indicated the decomposition of the donor molecule. In addition, the stoichiometry release of HNO was qualitatively and quantitatively verified through the classical phosphine compound trap. As compared with the donor molecule by itself, the decomposed product demonstrates a maximum fluorescence emission at 424 nm, where the increase of fluorescence intensity by 6.8 times can be applied to infer the real-time concentration of HNO. Moreover, cellular imaging can also be achieved using this Azo-D1 HNO donor through photoexcitation at 405 and 488 nm, where the real-time monitoring of HNO release was achieved without consuming the HNO source. Finally, the Azo-D1 HNO donor would open a new platform in the exploration of the biochemistry and the biology of HNO.
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Affiliation(s)
- Yang Zhou
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education and School of Chemistry and Chemical Engineering, Hainan University, Haikou, Hainan, 570228, China
| | - Jiajun Chen
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education and School of Chemistry and Chemical Engineering, Hainan University, Haikou, Hainan, 570228, China
| | - Yunxi Cui
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Lingjuan Tang
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education and School of Chemistry and Chemical Engineering, Hainan University, Haikou, Hainan, 570228, China
| | - Peixuan Wu
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education and School of Chemistry and Chemical Engineering, Hainan University, Haikou, Hainan, 570228, China
| | - Peng Yu
- Department of Joint Surgery, The First Affiliated Hospital of Hainan Medical University, Haikou, 570102, China
| | - Kun Fu
- Department of Joint Surgery, The First Affiliated Hospital of Hainan Medical University, Haikou, 570102, China
| | - Zhicheng Sun
- Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Yuanyuan Liu
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education and School of Chemistry and Chemical Engineering, Hainan University, Haikou, Hainan, 570228, China.
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3
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Negrellos A, Rice AM, Dos Santos PC, King SB. Sulfinamide Formation from the Reaction of Bacillithiol and Nitroxyl. ACS Chem Biol 2023; 18:2524-2534. [PMID: 38012810 PMCID: PMC11229778 DOI: 10.1021/acschembio.3c00526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Bacillithiol (BSH) replaces glutathione (GSH) as the most prominent low-molecular-weight thiol in many low G + C gram-positive bacteria. BSH plays roles in metal binding, protein/enzyme regulation, detoxification, redox buffering, and bacterial virulence. Given the small amounts of BSH isolated from natural sources and relatively lengthy chemical syntheses, the reactions of BSH with pertinent reactive oxygen, nitrogen, and sulfur species remain largely unexplored. We prepared BSH and exposed it to nitroxyl (HNO), a reactive nitrogen species that influences bacterial sulfur metabolism. The profile of this reaction was distinct from HNO oxidation of GSH, which yielded mixtures of disulfide and sulfinamide. The reaction of BSH and HNO (generated from Angeli's salt) gives only sulfinamide products, including a newly proposed cyclic sulfinamide. Treatment of a glucosamine-cysteine conjugate, which lacks the malic acid group, with HNO forms disulfide, implicating the malic acid group in sulfinamide formation. This finding supports a mechanism involving the formation of an N-hydroxysulfenamide intermediate that dehydrates to a sulfenium ion that can be trapped by water or internally trapped by an amide nitrogen to give the cyclic sulfinamide. The biological relevance of BSH reactivity toward HNO is provided through in vivo experiments demonstrating that Bacillus subtilis exposed to HNO shows a growth phenotype, and a strain unable to produce BSH shows hypersensitivity toward HNO in minimal medium cultures. Thiol analysis of HNO-exposed cultures shows an overall decrease in reduced BSH levels, which is not accompanied by increased levels of BSSB, supporting a model involving the formation of an oxidized sulfinamide derivative, identified in vivo by high-pressure liquid chromatography/mass spectrometry. Collectively, these findings reveal the unique chemistry and biology of HNO with BSH in bacteria that produce this biothiol.
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Affiliation(s)
- Alberto Negrellos
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27107, United States
| | - Allison M Rice
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27107, United States
| | - Patricia C Dos Santos
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27107, United States
| | - S Bruce King
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27107, United States
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Arasimowicz-Jelonek M, Floryszak-Wieczorek J, Suarez S, Doctorovich F, Sobieszczuk-Nowicka E, Bruce King S, Milczarek G, Rębiś T, Gajewska J, Jagodzik P, Żywicki M. Discovery of endogenous nitroxyl as a new redox player in Arabidopsis thaliana. NATURE PLANTS 2023; 9:36-44. [PMID: 36564632 PMCID: PMC9873566 DOI: 10.1038/s41477-022-01301-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 10/27/2022] [Indexed: 06/17/2023]
Abstract
Nitroxyl (HNO) is the one-electron reduced and protonated congener of nitric oxide (•NO), owning a distinct chemical profile. Based on real-time detection, we demonstrate that HNO is endogenously formed in Arabidopsis. Senescence and hypoxia induce shifts in the redox balance, triggering HNO decay or formation mediated by non-enzymatic •NO/HNO interconversion with cellular reductants. The stimuli-dependent HNO generation supports or competes with •NO signalling, depending on the local redox environment.
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Affiliation(s)
| | | | - S Suarez
- Department of Plant Ecophysiology, Adam Mickiewicz University, Poznań, Poland
- Departamento de Química Inorgánica, Analítica, y Química Física, Universidad de Buenos Aires, INQUIMAE-CONICET, Buenos Aires, Argentina
| | - F Doctorovich
- Departamento de Química Inorgánica, Analítica, y Química Física, Universidad de Buenos Aires, INQUIMAE-CONICET, Buenos Aires, Argentina
| | | | - S Bruce King
- Department of Chemistry, Wake Forest University, Winston-Salem, NC, USA
| | - G Milczarek
- Poznan University of Technology, Institute of Chemistry and Technical Electrochemistry, Poznan, Poland
| | - T Rębiś
- Poznan University of Technology, Institute of Chemistry and Technical Electrochemistry, Poznan, Poland
| | - J Gajewska
- Department of Plant Ecophysiology, Adam Mickiewicz University, Poznań, Poland
| | - P Jagodzik
- Department of Plant Ecophysiology, Adam Mickiewicz University, Poznań, Poland
| | - M Żywicki
- Department of Computational Biology, Institute of Molecular Biology and Biotechnology, Adam Mickiewicz University, Poznań, Poland
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5
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Kim YL, Plank JT, Li B, Lippert AR. Kinetics-Based Quantification of Peroxynitrite Using the Oxidative Decarbonylation of Isatin. Anal Chem 2022; 94:17803-17809. [PMID: 36520991 DOI: 10.1021/acs.analchem.2c03474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Peroxynitrite and its radical decomposition products are highly reactive nitrogen and oxygen species that can influence the balance between health and disease in multiple organ systems. Despite vigorous research activity, real-time quantitative monitoring of peroxynitrite generated by donor compounds remains challenging. Here, we report a kinetics-based fluorescence method for quantitative tracking of peroxynitrite generation using the oxidative decarbonylation of isatin to form anthranilic acid as a fluorescent probe. This method relies on knowledge of the rate of the reaction of peroxynitrite with the probe, which we measure using stopped-flow fluorescence techniques. To the best of our knowledge, this is the first optical method capable of providing real-time quantitative measures of peroxynitrite concentrations generated from donor compounds, as demonstrated herein for SIN-1 and Angeli's salt.
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Affiliation(s)
- Yujin L Kim
- Department of Chemistry, Southern Methodist University, Dallas, Texas75275-0314, United States
| | - Joshua T Plank
- Department of Chemistry, Southern Methodist University, Dallas, Texas75275-0314, United States
| | - Bo Li
- Department of Chemistry, Southern Methodist University, Dallas, Texas75275-0314, United States
| | - Alexander R Lippert
- Department of Chemistry, Southern Methodist University, Dallas, Texas75275-0314, United States
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6
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HNO Protects the Myocardium against Reperfusion Injury, Inhibiting the mPTP Opening via PKCε Activation. Antioxidants (Basel) 2022; 11:antiox11020382. [PMID: 35204265 PMCID: PMC8869498 DOI: 10.3390/antiox11020382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 01/05/2022] [Accepted: 02/07/2022] [Indexed: 12/10/2022] Open
Abstract
Donors of nitroxyl (HNO), the one electron-reduction product of nitric oxide (NO.), positively modulate cardiac contractility/relaxation while limiting ischemia-reperfusion (I/R) injury. The mechanisms underpinning HNO anti-ischemic effects remain poorly understood. Using isolated perfused rat hearts subjected to 30 min global ischemia/1 or 2 h reperfusion, here we tested whether, in analogy to NO., HNO protection requires PKCε translocation to mitochondria and KATP channels activation. To this end, we compared the benefits afforded by ischemic preconditioning (IPC; 3 cycles of I/R) with those eventually granted by the NO. donor, diethylamine/NO, DEA/NO, and two chemically unrelated HNO donors: Angeli’s salt (AS, a prototypic donor) and isopropylamine/NO (IPA/NO, a new HNO releaser). All donors were given for 19 min before I/R injury. In control I/R hearts (1 h reperfusion), infarct size (IS) measured via tetrazolium salt staining was 66 ± 5.5% of the area at risk. Both AS and IPA/NO were as effective as IPC in reducing IS [30.7 ± 2.2 (AS), 31 ± 2.9 (IPA/NO), and 31 ± 0.8 (IPC), respectively)], whereas DEA/NO was significantly less so (36.2 ± 2.6%, p < 0.001 vs. AS, IPA/NO, or IPC). IPA/NO protection was still present after 120 min of reperfusion, and the co-infusion with the PKCε inhibitor (PKCV1-2500 nM) prevented it (IS = 30 ± 0.5 vs. 61 ± 1.8% with IPA/NO alone, p < 0.01). Irrespective of the donor, HNO anti-ischemic effects were insensitive to the KATP channel inhibitor, 5-OH decanoate (5HD, 100 μM), that, in contrast, abrogated DEA/NO protection. Finally, both HNO donors markedly enhanced the mitochondrial permeability transition pore (mPTP) ROS threshold over control levels (≅35–40%), an action again insensitive to 5HD. Our study shows that HNO donors inhibit mPTP opening, thus limiting myocyte loss at reperfusion, a beneficial effect that requires PKCε translocation to the mitochondria but not mitochondrial K+ channels activation.
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7
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Kraft B, Jehmlich N, Larsen M, Bristow LA, Könneke M, Thamdrup B, Canfield DE. Oxygen and nitrogen production by an ammonia-oxidizing archaeon. Science 2022; 375:97-100. [PMID: 34990242 DOI: 10.1126/science.abe6733] [Citation(s) in RCA: 62] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Ammonia-oxidizing archaea (AOA) are one of the most abundant groups of microbes in the world’s oceans and are key players in the nitrogen cycle. Their energy metabolism—the oxidation of ammonia to nitrite—requires oxygen. Nevertheless, AOA are abundant in environments where oxygen is undetectable. By carrying out incubations for which oxygen concentrations were resolved to the nanomolar range, we show that after oxygen depletion, Nitrosopumilus maritimus produces dinitrogen and oxygen, which is used for ammonia oxidation. The pathway is not completely resolved but likely has nitric oxide and nitrous oxide as key intermediates. N. maritimus joins a handful of organisms known to produce oxygen in the dark. On the basis of this ability, we reevaluate the role of N. maritimus in oxygen-depleted marine environments.
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Affiliation(s)
- Beate Kraft
- Nordcee, Department of Biology, University of Southern Denmark, Odense, Denmark
| | - Nico Jehmlich
- Department of Molecular Systems Biology, Helmholtz Centre for Environmental Research UFZ GmbH, Leipzig, Germany
| | - Morten Larsen
- Nordcee, Department of Biology, University of Southern Denmark, Odense, Denmark
| | - Laura A Bristow
- Nordcee, Department of Biology, University of Southern Denmark, Odense, Denmark
| | - Martin Könneke
- Marine Archaea Group, Center for Marine Environmental Sciences (MARUM), and Department of Geosciences, University of Bremen, Bremen, Germany.,Institute for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg, Oldenburg, Germany
| | - Bo Thamdrup
- Nordcee, Department of Biology, University of Southern Denmark, Odense, Denmark
| | - Donald E Canfield
- Nordcee, Department of Biology, University of Southern Denmark, Odense, Denmark.,Key Laboratory of Petroleum Geochemistry, Research Institute of Petroleum Exploration and Development, China National Petroleum Corporation, Beijing 100083, China.,Danish Institute of Advanced Study, University of Southern Denmark, Odense, Denmark
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Neuman NI, Venâncio MF, Rocha WR, Bikiel DE, Suárez SA, Doctorovich F. Nitric Oxide Reacts Very Fast with Hydrogen Sulfide, Alcohols, and Thiols to Produce HNO: Revised Rate Constants. Inorg Chem 2021; 60:15997-16007. [PMID: 34450017 DOI: 10.1021/acs.inorgchem.1c01061] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The chemical reactivity of NO and its role in several biological processes seem well established. Despite this, the chemical reduction of •NO toward HNO has been historically discarded, mainly because of the negative reduction potential of NO. However, this value and its implications are nowadays under revision. The last reported redox potential, E'(NO,H+/HNO), at micromolar and picomolar concentrations of •NO and HNO, respectively, is between -0.3 and 0 V at pH 7.4. This potential implies that the one-electron-reduction process for NO is feasible under biological conditions and could be promoted by well-known biological reductants with reduction potentials of around -0.3 to -0.5 V. Moreover, the biologically compatible chemical reduction of •NO (nonenzymatic), like direct routes to HNO by alkylamines, aromatic and pseudoaromatic alcohols, thiols, and hydrogen sulfide, has been extensively explored by our group during the past decade. The aim of this work is to use a kinetic modeling approach to analyze electrochemical HNO measurements and to report for the first-time direct reaction rate constants between •NO and moderate reducing agents, producing HNO. These values are between 5 and 30 times higher than the previously reported keff values. On the other hand, we also showed that reaction through successive attack by two NO molecules to biologically compatible compounds could produce HNO. After over 3 decades of intense research, the •NO chemistry is still there, ready to be discovered.
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Affiliation(s)
- Nicolas I Neuman
- Instituto de Desarrollo Tecnológico para la Industria Química, INTEC, UNL-CONICET, Paraje El Pozo, Santa Fe 3000, Argentina
- Institut für Anorganische Chemie, Universität Stuttgart, Stuttgart D-70569, Germany
| | - Mateus F Venâncio
- Departamento de Físico-Química, Instituto de Química, Universidade Federal da Bahia, Salvador, Bahia 40170-110, Brazil
| | - Willian R Rocha
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | - Damian E Bikiel
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1053, Argentina
- INQUIMAE-CONICET, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
| | - Sebastián A Suárez
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1053, Argentina
- INQUIMAE-CONICET, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
| | - Fabio Doctorovich
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1053, Argentina
- INQUIMAE-CONICET, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
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9
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Carrone G, Mazzeo A, Marceca E, Pellegrino J, Suárez S, Zarenkiewicz J, Toscano JP, Doctorovich F. Solid-gas reactions for nitroxyl (HNO) generation in the gas phase. J Inorg Biochem 2021; 223:111535. [PMID: 34298305 DOI: 10.1016/j.jinorgbio.2021.111535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 06/01/2021] [Accepted: 07/05/2021] [Indexed: 02/02/2023]
Abstract
We present a novel nitroxyl (HNO) generation method, which avoids the need of using a liquid system or extreme experimental conditions. This method consists of the reaction between a gaseous base and an HNO donor (Piloty's acid) in the solid phase, allowing the formation of gaseous HNO in a fast and economical way. Detection of HNO was carried out indirectly, measuring the nitrous oxide (N2O) byproduct of HNO dimerization using infrared spectroscopy, and directly, using mass spectrometry techniques and an electrochemical HNO sensor.
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Affiliation(s)
- Guillermo Carrone
- Departamento de Química Inorgánica, Analítica, y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, INQUIMAE-CONICET, Ciudad Universitaria, Pab. 2, C1428EHA Buenos Aires, Argentina
| | - Agostina Mazzeo
- Departamento de Química Inorgánica, Analítica, y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, INQUIMAE-CONICET, Ciudad Universitaria, Pab. 2, C1428EHA Buenos Aires, Argentina
| | - Ernesto Marceca
- Departamento de Química Inorgánica, Analítica, y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, INQUIMAE-CONICET, Ciudad Universitaria, Pab. 2, C1428EHA Buenos Aires, Argentina
| | - Juan Pellegrino
- Departamento de Química Inorgánica, Analítica, y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, INQUIMAE-CONICET, Ciudad Universitaria, Pab. 2, C1428EHA Buenos Aires, Argentina
| | - Sebastián Suárez
- Departamento de Química Inorgánica, Analítica, y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, INQUIMAE-CONICET, Ciudad Universitaria, Pab. 2, C1428EHA Buenos Aires, Argentina
| | - Jessica Zarenkiewicz
- Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218, United States
| | - John P Toscano
- Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218, United States
| | - Fabio Doctorovich
- Departamento de Química Inorgánica, Analítica, y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, INQUIMAE-CONICET, Ciudad Universitaria, Pab. 2, C1428EHA Buenos Aires, Argentina.
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10
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Redox and Antioxidant Modulation of Circadian Rhythms: Effects of Nitroxyl, N-Acetylcysteine and Glutathione. Molecules 2021; 26:molecules26092514. [PMID: 33925826 PMCID: PMC8123468 DOI: 10.3390/molecules26092514] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 04/22/2021] [Accepted: 04/23/2021] [Indexed: 11/16/2022] Open
Abstract
The circadian clock at the hypothalamic suprachiasmatic nucleus (SCN) entrains output rhythms to 24-h light cycles. To entrain by phase-advances, light signaling at the end of subjective night (circadian time 18, CT18) requires free radical nitric oxide (NO•) binding to soluble guanylate cyclase (sGC) heme group, activating the cyclic guanosine monophosphate (cGMP)-dependent protein kinase (PKG). Phase-delays at CT14 seem to be independent of NO•, whose redox-related species were yet to be investigated. Here, the one-electron reduction of NO• nitroxyl was pharmacologically delivered by Angeli’s salt (AS) donor to assess its modulation on phase-resetting of locomotor rhythms in hamsters. Intracerebroventricular AS generated nitroxyl at the SCN, promoting phase-delays at CT14, but potentiated light-induced phase-advances at CT18. Glutathione/glutathione disulfide (GSH/GSSG) couple measured in SCN homogenates showed higher values at CT14 (i.e., more reduced) than at CT18 (oxidized). In addition, administration of antioxidants N-acetylcysteine (NAC) and GSH induced delays per se at CT14 but did not affect light-induced advances at CT18. Thus, the relative of NO• nitroxyl generates phase-delays in a reductive SCN environment, while an oxidative favors photic-advances. These data suggest that circadian phase-locking mechanisms should include redox SCN environment, generating relatives of NO•, as well as coupling with the molecular oscillator.
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11
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Updating NO •/HNO interconversion under physiological conditions: A biological implication overview. J Inorg Biochem 2020; 216:111333. [PMID: 33385637 DOI: 10.1016/j.jinorgbio.2020.111333] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 11/13/2020] [Accepted: 12/05/2020] [Indexed: 12/12/2022]
Abstract
Azanone (HNO/NO-), also called nitroxyl, is a highly reactive compound whose biological role is still a matter of debate. A key issue that remains to be clarified regarding HNO and its biological activity is that of its endogenous formation. Given the overlap of the molecular targets and reactivity of nitric oxide (NO•) and HNO, its chemical biology was perceived to be similar to that of NO• as a biological signaling agent. However, despite their closely related reactivity, NO• and HNO's biochemical pathways are quite different. Moreover, the reduction of nitric oxide to azanone is possible but necessarily coupled to other reactions, which drive the reaction forward, overcoming the unfavorable thermodynamic barrier. The mechanism of this NO•/HNO interplay and its downstream effects in different contexts were studied recently, showing that more than fifteen moderate reducing agents react with NO• producing HNO. Particularly, it is known that the reaction between nitric oxide and hydrogen sulfide (H2S) produces HNO. However, this rate constant was not reported yet. In this work, firstly the NO•/H2S effective rate constant was measured as a function of the pH. Then, the implications of these chemical (non-enzymatic), biologically compatible, routes to endogenous HNO formation was discussed. There is no doubt that HNO could be (is?) a new endogenously produced messenger that mediates specific physiological responses, many of which were attributed yet to direct NO• effects.
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12
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Zhang Z, Luo X, Yang Y. From Spontaneous to Photo‐Triggered and Photo‐Calibrated Nitric Oxide Donors. Isr J Chem 2020. [DOI: 10.1002/ijch.202000084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ziqian Zhang
- Guangxi Scientific Research Center of Traditional Chinese Medicine Guangxi University of Chinese Medicine Wuhe avenue 13 Nanning 530200 China
| | - Xiao Luo
- School of Chemistry and Molecular Engineering East China Normal University Dongchuan Road 500 Shanghai 200241 China
| | - Youjun Yang
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Chemical Biology, School of Pharmacy East China University of Science and Technology Meilong Road 130 Shanghai 200237 China
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13
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Álvarez L, Suárez SA, González PJ, Brondino CD, Doctorovich F, Martí MA. The Underlying Mechanism of HNO Production by the Myoglobin-Mediated Oxidation of Hydroxylamine. Inorg Chem 2020; 59:7939-7952. [DOI: 10.1021/acs.inorgchem.9b02750] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lucía Álvarez
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1428EHA, Argentina
- INQUIMAE-CONICET, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
| | - Sebastián A. Suárez
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1428EHA, Argentina
- INQUIMAE-CONICET, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
| | - Pablo J. González
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral y CONICET, S3000ZAA Santa Fe, Argentina
| | - Carlos D. Brondino
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral y CONICET, S3000ZAA Santa Fe, Argentina
| | - Fabio Doctorovich
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1428EHA, Argentina
- INQUIMAE-CONICET, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
| | - Marcelo A. Martí
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1428EHA, Argentina
- IQUIBICEN-CONICET, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
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14
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Induction of caveolin-3/eNOS complex by nitroxyl (HNO) ameliorates diabetic cardiomyopathy. Redox Biol 2020; 32:101493. [PMID: 32182574 PMCID: PMC7078438 DOI: 10.1016/j.redox.2020.101493] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 02/24/2020] [Accepted: 03/03/2020] [Indexed: 12/15/2022] Open
Abstract
Nitroxyl (HNO), one-electron reduced and protonated sibling of nitric oxide (NO), is a potential regulator of cardiovascular functions. It produces positive inotropic, lusitropic, myocardial anti-hypertrophic and vasodilator properties. Despite of these favorable actions, the significance and the possible mechanisms of HNO in diabetic hearts have yet to be fully elucidated. H9c2 cells or primary neonatal mouse cardiomyocytes were incubated with normal glucose (NG) or high glucose (HG). Male C57BL/6 mice received intraperitoneal injection of streptozotocin (STZ) to induce diabetes. Here, we demonstrated that the baseline fluorescence signals of HNO in H9c2 cells were reinforced by both HNO donor Angeli's salt (AS), and the mixture of hydrogen sulfide (H2S) donor sodium hydrogen sulfide (NaHS) and NO donor sodium nitroprusside (SNP), but decreased by HG. Pretreatment with AS significantly reduced HG-induced cell vitality injury, apoptosis, reactive oxygen species (ROS) generation, and hypertrophy in H9c2 cells. This effect was mediated by induction of caveolin-3 (Cav-3)/endothelial nitric oxide (NO) synthase (eNOS) complex. Disruption of Cav-3/eNOS by pharmacological manipulation or small interfering RNA (siRNA) abolished the protective effects of AS in HG-incubated H9c2 cells. In STZ-induced diabetic mice, administration of AS ameliorated the development of diabetic cardiomyopathy, as evidenced by improved cardiac function and reduced cardiac hypertrophy, apoptosis, oxidative stress and myocardial fibrosis without affecting hyperglycemia. This study shed light on how interaction of NO and H2S regulates cardiac pathology and provide new route to treat diabetic cardiomyopathy with HNO.
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15
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Sun HJ, Lee WT, Leng B, Wu ZY, Yang Y, Bian JS. Nitroxyl as a Potential Theranostic in the Cancer Arena. Antioxid Redox Signal 2020; 32:331-349. [PMID: 31617376 DOI: 10.1089/ars.2019.7904] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Significance: As one-electron reduced molecule of nitric oxide (NO), nitroxyl (HNO) has gained enormous attention because of its novel physiological or pharmacological properties, ranging from cardiovascular protective actions to antitumoricidal effects. Recent Advances: HNO is emerging as a new entity with therapeutic advantages over its redox sibling, NO. The interests in the chemical, pharmacological, and biological characteristics of HNO have broadened our current understanding of its role in physiology and pathophysiology. Critical Issues: In particular, the experimental evidence suggests the therapeutic potential of HNO in tumor pharmacology, such as neuroblastoma, gastrointestinal tumor, ovarian, lung, and breast cancers. Indeed, HNO donors have been demonstrated to attenuate tumor proliferation and angiogenesis. Future Directions: In this review, the generation and detection of HNO are outlined, and the roles of HNO in cancer progression are further discussed. We anticipate that the completion of this review might give novel insights into the roles of HNO in cancer pharmacology and open up a novel field of cancer therapy based on HNO.
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Affiliation(s)
- Hai-Jian Sun
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Wei-Thye Lee
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Bin Leng
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Zhi-Yuan Wu
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Yong Yang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, Center for New Drug Safety Evaluation and Research, China Pharmaceutical University, Nanjing, China
| | - Jin-Song Bian
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,National University of Singapore (Suzhou) Research Institute, Suzhou, China
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16
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Rudneva TN, Zhukova OS, Shilov GV, Chikileva IO, Kisilevskii MV, Sanina NA, Aldoshin SM. Synthesis, structure and antitumor activity of the binuclear tetranitrosyl iron complex with 2-mercaptobenzthiazole – the nitric oxide donor (NO). J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1583331] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Tatiana N. Rudneva
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Olga S. Zhukova
- N.N. Blokhin Cancer Research Center, Russian Ministry of Health, Moscow, Russia
| | - Gennady V. Shilov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Irina O. Chikileva
- N.N. Blokhin Cancer Research Center, Russian Ministry of Health, Moscow, Russia
| | | | - Nataliya A. Sanina
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Sergey M. Aldoshin
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
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17
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18
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Smulik-Izydorczyk R, Rostkowski M, Gerbich A, Jarmoc D, Adamus J, Leszczyńska A, Michalski R, Marcinek A, Kramkowski K, Sikora A. Decomposition of Piloty's acid derivatives – Toward the understanding of factors controlling HNO release. Arch Biochem Biophys 2019; 661:132-144. [DOI: 10.1016/j.abb.2018.11.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 10/11/2018] [Accepted: 11/14/2018] [Indexed: 01/21/2023]
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19
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Kozub GI, Sanina NA, Emel'yanova NS, Utenishev AN, Kondrat'eva TA, Khrustalev VN, Ovanesyan NS, Kupchinskaya NE, Aldoshin SM. [Fe2(µ-SR)2(NO)4]0 complexes with R being phenolyl with different substituents in the meta-position: Synthesis, structure, and NO release. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.05.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Puglisi MP, Bradaric MJ, Pontikis J, Cabai J, Weyna T, Tednes P, Schretzman R, Rickert K, Cao Z, Andrei D. Novel primary amine diazeniumdiolates-Chemical and biological characterization. Drug Dev Res 2018; 79:136-143. [DOI: 10.1002/ddr.21428] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Accepted: 04/11/2018] [Indexed: 12/23/2022]
Affiliation(s)
- Melany P. Puglisi
- Department of Pharmaceutical Sciences; Chicago State University; Chicago Illinois
| | - Michael J. Bradaric
- Department of Pharmaceutical Sciences; Chicago State University; Chicago Illinois
| | - John Pontikis
- Department of Chemistry; Dominican University; River Forest Illinois
| | - Jonathan Cabai
- Department of Chemistry; Dominican University; River Forest Illinois
| | - Theodore Weyna
- Department of Chemistry; Dominican University; River Forest Illinois
| | - Patrick Tednes
- Department of Chemistry; Dominican University; River Forest Illinois
| | - Robert Schretzman
- Department of Chemistry; Dominican University; River Forest Illinois
| | - Karl Rickert
- Department of Chemistry; Dominican University; River Forest Illinois
| | - Zhao Cao
- Basic Research Program, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research; Frederick Maryland
| | - Daniela Andrei
- Department of Chemistry; Dominican University; River Forest Illinois
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21
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Cao J, An W, Reeves AG, Lippert AR. A chemiluminescent probe for cellular peroxynitrite using a self-immolative oxidative decarbonylation reaction. Chem Sci 2018; 9:2552-2558. [PMID: 29732134 PMCID: PMC5914148 DOI: 10.1039/c7sc05087a] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 01/31/2018] [Indexed: 01/04/2023] Open
Abstract
Peroxynitrite is a damaging agent of oxidative stress that has been difficult to monitor in living cells. Here, an isatin-based chemiluminescent probe for peroxynitrite is reported.
Peroxynitrite (ONOO–) is a highly reactive oxygen species which has been recognized as an endogenous mediator of physiological activities like the immune response as well as a damaging agent of oxidative stress under pathological conditions. While its biological importance is becoming clearer, many of the details of its production and mechanism of action remain elusive due to the lack of available selective and sensitive detection methods. Herein, we report the development, characterization, and biological applications of a reaction-based chemiluminescent probe for ONOO– detection, termed as PNCL. PNCL reacts with ONOO–via an isatin moiety through an oxidative decarbonylation reaction to initiate light emission that can be observed instantly with high selectivity against other reactive sulphur, oxygen, and nitrogen species. Detailed studies were performed to study the reaction between isatin and ONOO–, which confirm selectivity for ONOO– over NO2˙. PNCL has been applied for ONOO– detection in aqueous solution and live cells. Moreover, PNCL can be employed to detect cellular ONOO– generated in macrophages stimulated to mount an immune response with lipopolysaccharide (LPS). The sensitivity granted by chemiluminescent detection together with the specificity of the oxidative decarbonylation reaction provides a useful tool to explore ONOO– chemistry and biology.
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Affiliation(s)
- Jian Cao
- Department of Chemistry , Southern Methodist University , Dallas , TX 75275-0314 , USA . .,Center for Drug Discovery , Design, and Delivery (CD4) , Southern Methodist University , Dallas , TX 75275-0314 , USA
| | - Weiwei An
- Department of Chemistry , Southern Methodist University , Dallas , TX 75275-0314 , USA . .,Center for Drug Discovery , Design, and Delivery (CD4) , Southern Methodist University , Dallas , TX 75275-0314 , USA
| | - Audrey G Reeves
- Department of Chemistry , Southern Methodist University , Dallas , TX 75275-0314 , USA .
| | - Alexander R Lippert
- Department of Chemistry , Southern Methodist University , Dallas , TX 75275-0314 , USA . .,Center for Drug Discovery , Design, and Delivery (CD4) , Southern Methodist University , Dallas , TX 75275-0314 , USA.,Center for Global Health Impact (CGHI) , Southern Methodist University , Dallas , TX 75275-0314 , USA
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22
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Suarez SA, Muñoz M, Alvarez L, Venâncio MF, Rocha WR, Bikiel DE, Marti MA, Doctorovich F. HNO Is Produced by the Reaction of NO with Thiols. J Am Chem Soc 2017; 139:14483-14487. [DOI: 10.1021/jacs.7b06968] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sebastian A. Suarez
- Departamento
de Química Inorgánica, Analítica y Química
Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, INQUIMAE-CONICET, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
| | - Martina Muñoz
- Departamento
de Química Inorgánica, Analítica y Química
Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, INQUIMAE-CONICET, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
| | - Lucia Alvarez
- Departamento
de Química Inorgánica, Analítica y Química
Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, INQUIMAE-CONICET, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
| | - Mateus F. Venâncio
- Departamento
de Química, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - Willian R. Rocha
- Departamento
de Química, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - Damian E. Bikiel
- Departamento
de Química Inorgánica, Analítica y Química
Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, INQUIMAE-CONICET, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
| | - Marcelo A. Marti
- Departamento
de Química Biológica, Facultad de Ciencias Exactas y
Naturales, Universidad de Buenos Aires, IQUIBICEN-CONICET, Ciudad Universitaria, Buenos
Aires C1428EHA, Argentina
| | - Fabio Doctorovich
- Departamento
de Química Inorgánica, Analítica y Química
Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, INQUIMAE-CONICET, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
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23
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Kim S, Minier MA, Loas A, Becker S, Wang F, Lippard SJ. Achieving Reversible Sensing of Nitroxyl by Tuning the Ligand Environment of Azamacrocyclic Copper(II) Complexes. J Am Chem Soc 2016; 138:1804-7. [PMID: 26836121 DOI: 10.1021/jacs.5b12825] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
To elucidate the factors that impart selectivity for nitroxyl (HNO) over nitric oxide (NO), thiols, and H2S in metal-based fluorescent probes, we investigated five Cu(II)-cyclam (14-N4) derivatives. Upon exposure to NO gas at pH 7, no changes occur in the UV-vis spectra of any of the complexes. Addition of Angeli's salt to generate HNO promotes reduction of Cu(II) only in the case of [Cu(II)(14-N4-Ts)(OTf)2], which has the most positive reduction potential of the series. To gain insight into the observed reactivity, we prepared the Cu(II) complex of the mixed thia/aza 14-N2S2 ligand. [Cu(II)(14-N2S2)(OTf)2] reacts reversibly with HNO at pH 7, although nonselectively over thiols and H2S. The recurrent sensing of HNO uncovered with the study of Cu(II) azamacrocyclic complexes is a remarkable feature that opens the door for the design of a new generation of metal-based probes.
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Affiliation(s)
- Sunghee Kim
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Mikael A Minier
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Andrei Loas
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Sabine Becker
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Fang Wang
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Stephen J Lippard
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
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24
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HNO/Thiol Biology as a Therapeutic Target. OXIDATIVE STRESS IN APPLIED BASIC RESEARCH AND CLINICAL PRACTICE 2016. [DOI: 10.1007/978-3-319-30705-3_14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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25
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Ding, QG, Zang J, Gao S, Gao Q, Duan W, Li X, Xu W, Zhang Y. Nitric oxide donor hybrid compounds as promising anticancer agents. Drug Discov Ther 2016; 10:276-284. [PMID: 27990006 DOI: 10.5582/ddt.2016.01067] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Qin-ge Ding,
- Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University
| | - Jie Zang
- Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University
| | - Shuai Gao
- Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University
| | - Qianwen Gao
- Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University
| | - Wenwen Duan
- Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University
| | - Xiaoyang Li
- Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University
| | - Wenfang Xu
- Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University
| | - Yingjie Zhang
- Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University
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26
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Nitroxyl (HNO): A Reduced Form of Nitric Oxide with Distinct Chemical, Pharmacological, and Therapeutic Properties. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2016:4867124. [PMID: 26770654 PMCID: PMC4685437 DOI: 10.1155/2016/4867124] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 08/14/2015] [Accepted: 09/01/2015] [Indexed: 01/18/2023]
Abstract
Nitroxyl (HNO), the one-electron reduced form of nitric oxide (NO), shows a distinct chemical and biological profile from that of NO. HNO is currently being viewed as a vasodilator and positive inotropic agent that can be used as a potential treatment for heart failure. The ability of HNO to react with thiols and thiol containing proteins is largely used to explain the possible biological actions of HNO. Herein, we summarize different aspects related to HNO including HNO donors, chemistry, biology, and methods used for its detection.
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27
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Torras J, Seabra GDM, Roitberg AE. A Multiscale Treatment of Angeli's Salt Decomposition. J Chem Theory Comput 2015; 5:37-46. [PMID: 26609819 DOI: 10.1021/ct800236d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Sodium trioxodinitrate's (Na2N2O3, Angeli's salt) unique cardiovascular effects have been associated with its ability to yield HNO upon dissociation under physiological conditions. Due to its potential applications in new therapies for heart failure, the dissociation of Angeli's salt has recently received increased attention. The decomposition mechanism has been previously studied by quantum mechanical methods using a continuum approximation (PCM) for the solvent effects. In this work we use our recently developed interface of the Amber and Gaussian packages via the PUPIL package to study Angeli's salt dissociation in a hybrid QM/MM scheme where the water solvent molecules are treated explicitly with classical mechanics while the solute is treated with full quantum mechanics (UB3LYP/6-31+G(d) and UMP2/6-31+G(d)) level. Multiple steered molecular dynamics was used with the Jarzynski relationship to extract the free energy profile for the process. We obtain 4.8 kcal mol(-1) and 6.4 kcal mol(-1) free energy barriers for the N-N bond breaking for UB3LYP and UMP2, respectively. The geometries and Mulliken charges for reactant, transition state, and products have been characterized through a number of hybrid QM/MM molecular dynamics runs with the N-N distance restrained to representative values of each species. The results highlight the role of individual solvent molecules for the reaction energetics and provide a comparison point against implicit solvation methods.
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Affiliation(s)
- Juan Torras
- Departament d'Enginyeria Química, EUETII, Universitat Politècnica de Catalunya, Pça. Rei 15, 08700-Igualada, Spain, and Quantum Theory Project, Departments of Physics and of Chemistry, University of Florida, Gainesville, Florida 32611-8435
| | - Gustavo de M Seabra
- Departament d'Enginyeria Química, EUETII, Universitat Politècnica de Catalunya, Pça. Rei 15, 08700-Igualada, Spain, and Quantum Theory Project, Departments of Physics and of Chemistry, University of Florida, Gainesville, Florida 32611-8435
| | - Adrian E Roitberg
- Departament d'Enginyeria Química, EUETII, Universitat Politècnica de Catalunya, Pça. Rei 15, 08700-Igualada, Spain, and Quantum Theory Project, Departments of Physics and of Chemistry, University of Florida, Gainesville, Florida 32611-8435
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28
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Basudhar D, Cheng RC, Bharadwaj G, Ridnour LA, Wink DA, Miranda KM. Chemotherapeutic potential of diazeniumdiolate-based aspirin prodrugs in breast cancer. Free Radic Biol Med 2015; 83:101-14. [PMID: 25659932 PMCID: PMC4441830 DOI: 10.1016/j.freeradbiomed.2015.01.029] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 01/05/2015] [Accepted: 01/13/2015] [Indexed: 12/12/2022]
Abstract
Diazeniumdiolate-based aspirin prodrugs have previously been shown to retain the anti-inflammatory properties of aspirin while protecting against the common side effect of stomach ulceration. Initial analysis of two new prodrugs of aspirin that also release either nitroxyl (HNO) or nitric oxide (NO) demonstrated increased cytotoxicity toward human lung carcinoma cells compared to either aspirin or the parent nitrogen oxide donor. In addition, cytotoxicity was significantly lower in endothelial cells, suggesting cancer-specific sensitivity. To assess the chemotherapeutic potential of these new prodrugs in treatment of breast cancer, we studied their effect both in cultured cells and in a nude mouse model. Both prodrugs reduced growth of breast adenocarcinoma cells more effectively than the parent compounds while not being appreciably cytotoxic in a related nontumorigenic cell line (MCF-10A). The HNO donor also was more cytotoxic than the related NO donor. The basis for the observed specificity was investigated in terms of impact on metabolism, DNA damage and repair, apoptosis, angiogenesis and metastasis. The results suggest a significant pharmacological potential for treatment of breast cancer.
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Affiliation(s)
- Debashree Basudhar
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721, USA
| | - Robert C Cheng
- Radiation Biology Branch, National Institutes of Health, Bethesda, MD 20892, USA
| | - Gaurav Bharadwaj
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721, USA
| | - Lisa A Ridnour
- Radiation Biology Branch, National Institutes of Health, Bethesda, MD 20892, USA
| | - David A Wink
- Radiation Biology Branch, National Institutes of Health, Bethesda, MD 20892, USA
| | - Katrina M Miranda
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721, USA.
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29
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Loas A, Radford RJ, Deliz Liang A, Lippard SJ. Solid-phase synthesis provides a modular, lysine-based platform for fluorescent discrimination of nitroxyl and biological thiols. Chem Sci 2015; 6:4131-4140. [PMID: 28717469 PMCID: PMC5497726 DOI: 10.1039/c5sc00880h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 05/05/2015] [Indexed: 11/24/2022] Open
Abstract
A synthetically facile solid-phase approach yields fluorescent Cu(ii)-based lysine conjugates which selectively detect nitroxyl and thiols in live cells.
We describe a modular, synthetically facile solid-phase approach aimed at separating the fluorescent reporter and binding unit of small-molecule metal-based sensors. The first representatives contain a lysine backbone functionalized with a tetramethylrhodamine fluorophore, and they operate by modulating the oxidation state of a copper ion ligated to an [N4] (cyclam) or an [N2O] (quinoline-phenolate) moiety. We demonstrate the selectivity of their Cu(ii) complexes for sensing nitroxyl (HNO) and thiols (RSH), respectively, and investigate the mechanism responsible for the observed reactivity in each case. The two lysine conjugates are cell permeable in the active, Cu(ii)-bound forms and retain their analyte selectivity intracellularly, even in the presence of interfering species such as nitric oxide, nitrosothiols, and hydrogen sulfide. Moreover, we apply the new probes to discriminate between distinct levels of intracellular HNO and RSH generated upon stimulation of live HeLa cells with ascorbate and hydrogen sulfide, respectively. The successful implementation of the lysine-based sensors to gain insight into biosynthetic pathways validates the method as a versatile tool for producing libraries of analogues with minimal synthetic effort.
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Affiliation(s)
- Andrei Loas
- Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , MA 02139 , USA . ; ; Tel: +1-617-253-1892
| | - Robert J Radford
- Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , MA 02139 , USA . ; ; Tel: +1-617-253-1892
| | - Alexandria Deliz Liang
- Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , MA 02139 , USA . ; ; Tel: +1-617-253-1892
| | - Stephen J Lippard
- Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , MA 02139 , USA . ; ; Tel: +1-617-253-1892
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30
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Abstract
The loss of contractile function is a hallmark of heart failure. Although increasing intracellular Ca(2+) is a possible strategy for improving contraction, current inotropic agents that achieve this by raising intracellular cAMP levels, such as β-agonists and phosphodiesterase inhibitors, are generally deleterious when administered as long-term therapy due to arrhythmia and myocardial damage. Nitroxyl donors have been shown to improve cardiac function in normal and failing dogs, and in isolated cardiomyocytes they increase fractional shortening and Ca(2+) transients, independently from cAMP/PKA or cGMP/PKG signaling. Instead, nitroxyl targets cysteines in the EC-coupling machinery and myofilament proteins, reversibly modifying them to enhance Ca(2+) handling and myofilament Ca(2+) sensitivity. Phase I-IIa trials with CXL-1020, a novel pure HNO donor, reported declines in left and right heart filling pressures and systemic vascular resistance, and increased cardiac output and stroke volume index. These findings support the concept of nitroxyl donors as attractive agents for the treatment of acute decompensated heart failure.
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New acyloxy nitroso compounds with improved water solubility and nitroxyl (HNO) release kinetics and inhibitors of platelet aggregation. Bioorg Med Chem 2015; 23:6069-77. [PMID: 26228501 DOI: 10.1016/j.bmc.2015.04.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 04/03/2015] [Accepted: 04/09/2015] [Indexed: 11/22/2022]
Abstract
New acyloxy nitroso compounds, 4-nitrosotetrahydro-2H-pyran-4-yl 2,2,2-trichloroacetate and 4-nitrosotetrahydro-2H-pyran-4-yl 2,2-dichloropropanoate were prepared. These compounds release HNO under neutral conditions with half-lives between 50 and 120min, identifying these HNO donors as kinetically intermediate to the much slower acetate derivative and the faster trifluoroacetic acid derivative. These compounds or HNO-derived from these compounds react with thiols, including glutathione, thiol-containing enzymes and heme-containing proteins in a similar fashion to other acyloxy nitroso compounds. HNO released from these acyloxy nitroso compounds inhibits activated platelet aggregation. These acyloxy nitroso compounds augment the range of release for this group of HNO donors and should be valuable tools in the further study of HNO biology.
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Comparison of the chemical reactivity of synthetic peroxynitrite with that of the autoxidation products of nitroxyl or its anion. Nitric Oxide 2015; 44:39-46. [DOI: 10.1016/j.niox.2014.11.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 10/21/2014] [Accepted: 11/03/2014] [Indexed: 11/18/2022]
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Chin KY, Qin C, Cao N, Kemp-Harper BK, Woodman OL, Ritchie RH. The concomitant coronary vasodilator and positive inotropic actions of the nitroxyl donor Angeli's salt in the intact rat heart: contribution of soluble guanylyl cyclase-dependent and -independent mechanisms. Br J Pharmacol 2014; 171:1722-34. [PMID: 24372173 DOI: 10.1111/bph.12568] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 12/11/2013] [Accepted: 12/20/2013] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND AND PURPOSE The NO redox sibling nitroxyl (HNO) elicits soluble guanylyl cyclase (sGC)-dependent vasodilatation. HNO has high reactivity with thiols, which is attributed with HNO-enhanced left ventricular (LV) function. Here, we tested the hypothesis that the concomitant vasodilatation and inotropic actions induced by a HNO donor, Angeli's salt (sodium trioxodinitrate), were sGC-dependent and sGC-independent respectively. EXPERIMENTAL APPROACH Haemodynamic responses to Angeli's salt (10 pmol-10 μmol), alone and in the presence of scavengers of HNO (L-cysteine, 4 mM) or of NO [hydroxocobalamin (HXC), 100 μM] or a selective inhibitor of sGC [1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one (ODQ), 10 μM], a CGRP receptor antagonist (CGRP8-37 , 0.1 μM) or a blocker of voltage-dependent potassium channels [4-aminopyridine (4-AP), 1 mM] were determined in isolated hearts from male rats. KEY RESULTS Angeli's salt elicited concomitant, dose-dependent increases in coronary flow and LV systolic and diastolic function. Both L-cysteine and ODQ shifted (but did not abolish) the dose-response curve of each of these effects to the right, implying contributions from HNO and sGC in both the vasodilator and inotropic actions. In contrast, neither HXC, CGRP8-37 nor 4-AP affected these actions. CONCLUSIONS AND IMPLICATIONS Both vasodilator and inotropic actions of the HNO donor Angeli's salt were mediated in part by sGC-dependent mechanisms, representing the first evidence that sGC contributes to the inotropic and lusitropic action of HNO in the intact heart. Thus, HNO acutely enhances LV contraction and relaxation, while concomitantly unloading the heart, potentially beneficial actions in failing hearts.
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Affiliation(s)
- Kai Yee Chin
- Heart Failure Pharmacology, Baker IDI Heart & Diabetes Institute, Melbourne, Vic., Australia; School of Medical Sciences, RMIT University, Bundoora, Vic., Australia
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Wahman DG, Speitel GE, Machavaram MV. A proposed abiotic reaction scheme for hydroxylamine and monochloramine under chloramination relevant drinking water conditions. WATER RESEARCH 2014; 60:218-227. [PMID: 24862953 DOI: 10.1016/j.watres.2014.04.051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 04/24/2014] [Accepted: 04/29/2014] [Indexed: 06/03/2023]
Abstract
Drinking water monochloramine (NH2Cl) use may promote ammonia-oxidizing bacteria (AOB). AOB use (i) ammonia monooxygenase for biological ammonia (NH3) oxidation to hydroxylamine (NH2OH) and (ii) hydroxylamine oxidoreductase for NH2OH oxidation to nitrite. NH2Cl and NH2OH may react, providing AOB potential benefits and detriments. The NH2Cl/NH2OH reaction would benefit AOB by removing the disinfectant (NH2Cl) and releasing their growth substrate (NH3), but the NH2Cl/NH2OH reaction would also provide a possible additional inactivation mechanism besides direct NH2Cl reaction with cells. Because biological NH2OH oxidation supplies the electrons required for biological NH3 oxidation, the NH2Cl/NH2OH reaction provides a direct mechanism for NH2Cl to inhibit NH3 oxidation, starving the cell of reductant by preventing biological NH2OH oxidation. To investigate possible NH2Cl/NH2OH reaction implications on AOB, an understanding of the underlying abiotic reaction is first required. The present study conducted a detailed literature review and proposed an abiotic NH2Cl/NH2OH reaction scheme (RS) for chloramination relevant drinking water conditions (μM concentrations, air saturation, and pH 7-9). Next, RS literature based kinetics and end-products were evaluated experimentally between pHs 7.7 and 8.3, representing (i) the pH range for future experiments with AOB and (ii) mid-range pHs typically found in chloraminated drinking water. In addition, a (15)N stable isotope experiment was conducted to verify nitrous oxide and nitrogen gas production and their nitrogen source. Finally, the RS was slightly refined using the experimental data and an AQUASIM implemented kinetic model. A chloraminated drinking water relevant RS is proposed and provides the abiotic reaction foundation for future AOB biotic experiments.
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Affiliation(s)
- David G Wahman
- United States Environmental Protection Agency, Office of Research and Development, 26 W. Martin Luther King Dr., Cincinnati, OH 45268, USA.
| | - Gerald E Speitel
- University of Texas at Austin, Department of Civil, Architectural and Environmental Engineering, Austin, TX 78712, USA
| | - Madhav V Machavaram
- Pegasus Technical Services Inc., 26 W. Martin Luther King Drive, Cincinnati, OH 45268, USA
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Eberhardt M, Dux M, Namer B, Miljkovic J, Cordasic N, Will C, Kichko TI, de la Roche J, Fischer M, Suárez SA, Bikiel D, Dorsch K, Leffler A, Babes A, Lampert A, Lennerz JK, Jacobi J, Martí MA, Doctorovich F, Högestätt ED, Zygmunt PM, Ivanovic-Burmazovic I, Messlinger K, Reeh P, Filipovic MR. H2S and NO cooperatively regulate vascular tone by activating a neuroendocrine HNO-TRPA1-CGRP signalling pathway. Nat Commun 2014; 5:4381. [PMID: 25023795 PMCID: PMC4104458 DOI: 10.1038/ncomms5381] [Citation(s) in RCA: 298] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 06/12/2014] [Indexed: 02/08/2023] Open
Abstract
Nitroxyl (HNO) is a redox sibling of nitric oxide (NO) that targets distinct signalling pathways with pharmacological endpoints of high significance in the treatment of heart failure. Beneficial HNO effects depend, in part, on its ability to release calcitonin gene-related peptide (CGRP) through an unidentified mechanism. Here we propose that HNO is generated as a result of the reaction of the two gasotransmitters NO and H2S. We show that H2S and NO production colocalizes with transient receptor potential channel A1 (TRPA1), and that HNO activates the sensory chemoreceptor channel TRPA1 via formation of amino-terminal disulphide bonds, which results in sustained calcium influx. As a consequence, CGRP is released, which induces local and systemic vasodilation. H2S-evoked vasodilatatory effects largely depend on NO production and activation of HNO–TRPA1–CGRP pathway. We propose that this neuroendocrine HNO–TRPA1–CGRP signalling pathway constitutes an essential element for the control of vascular tone throughout the cardiovascular system. Nitric oxide (NO) and hydrogen sulphide (H2S) are two gaseous signalling molecules produced in tissues. Here the authors propose that NO and H2S react with each other to form nitroxyl (HNO), which activates the TRPA1 channel in nerve cells and triggers the release of the vasoactive peptide CGRP.
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Affiliation(s)
- Mirjam Eberhardt
- 1] Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen, Germany [2] Institute of Physiology and Pathophysiology Friedrich-Alexander University Erlangen-Nuremberg, Universitaetsstrasse 17, 91054 Erlangen, Germany [3] Department of Anesthesiology and Intensive Care, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany
| | - Maria Dux
- 1] Institute of Physiology and Pathophysiology Friedrich-Alexander University Erlangen-Nuremberg, Universitaetsstrasse 17, 91054 Erlangen, Germany [2] Department of Physiology, University of Szeged, Dóm tér 10, H-6720 Szeged, Hungary
| | - Barbara Namer
- Institute of Physiology and Pathophysiology Friedrich-Alexander University Erlangen-Nuremberg, Universitaetsstrasse 17, 91054 Erlangen, Germany
| | - Jan Miljkovic
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Nada Cordasic
- Department of Nephrology and Hypertension, University of Erlangen-Nuremberg, Krankenhausstrasse 12, 91054 Erlangen, Germany
| | - Christine Will
- Institute of Physiology and Pathophysiology Friedrich-Alexander University Erlangen-Nuremberg, Universitaetsstrasse 17, 91054 Erlangen, Germany
| | - Tatjana I Kichko
- Institute of Physiology and Pathophysiology Friedrich-Alexander University Erlangen-Nuremberg, Universitaetsstrasse 17, 91054 Erlangen, Germany
| | - Jeanne de la Roche
- Department of Anesthesiology and Intensive Care, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany
| | - Michael Fischer
- 1] Institute of Physiology and Pathophysiology Friedrich-Alexander University Erlangen-Nuremberg, Universitaetsstrasse 17, 91054 Erlangen, Germany [2] Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge CB1 2PD, UK
| | - Sebastián A Suárez
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA, Buenos Aires, Argentina
| | - Damian Bikiel
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA, Buenos Aires, Argentina
| | - Karola Dorsch
- Institute of Pathology, University of Ulm, Albert-Einstein-Allee 23, 89070 Ulm, Germany
| | - Andreas Leffler
- Department of Anesthesiology and Intensive Care, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany
| | - Alexandru Babes
- 1] Institute of Physiology and Pathophysiology Friedrich-Alexander University Erlangen-Nuremberg, Universitaetsstrasse 17, 91054 Erlangen, Germany [2] Department of Anatomy, Physiology and Biophysics, Faculty of Biology, University of Bucharest, Splaiul Independentei 91-95, 050095 Bucharest, Romania
| | - Angelika Lampert
- 1] Institute of Physiology and Pathophysiology Friedrich-Alexander University Erlangen-Nuremberg, Universitaetsstrasse 17, 91054 Erlangen, Germany [2]
| | - Jochen K Lennerz
- Institute of Pathology, University of Ulm, Albert-Einstein-Allee 23, 89070 Ulm, Germany
| | - Johannes Jacobi
- Department of Nephrology and Hypertension, University of Erlangen-Nuremberg, Krankenhausstrasse 12, 91054 Erlangen, Germany
| | - Marcelo A Martí
- 1] Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA, Buenos Aires, Argentina [2] Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA, Buenos Aires, Argentina
| | - Fabio Doctorovich
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA, Buenos Aires, Argentina
| | - Edward D Högestätt
- Clinical Chemistry & Pharmacology, Department of Laboratory Medicine, Lund University Hospital, SE-221 85 Lund, Sweden
| | - Peter M Zygmunt
- Clinical Chemistry & Pharmacology, Department of Laboratory Medicine, Lund University Hospital, SE-221 85 Lund, Sweden
| | - Ivana Ivanovic-Burmazovic
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Karl Messlinger
- Institute of Physiology and Pathophysiology Friedrich-Alexander University Erlangen-Nuremberg, Universitaetsstrasse 17, 91054 Erlangen, Germany
| | - Peter Reeh
- 1] Institute of Physiology and Pathophysiology Friedrich-Alexander University Erlangen-Nuremberg, Universitaetsstrasse 17, 91054 Erlangen, Germany [2]
| | - Milos R Filipovic
- 1] Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen, Germany [2]
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Affiliation(s)
- Gizem Keceli
- Department
of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - John P. Toscano
- Department
of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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37
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Wrobel AT, Johnstone TC, Deliz Liang A, Lippard SJ, Rivera-Fuentes P. A fast and selective near-infrared fluorescent sensor for multicolor imaging of biological nitroxyl (HNO). J Am Chem Soc 2014; 136:4697-705. [PMID: 24564324 PMCID: PMC3985477 DOI: 10.1021/ja500315x] [Citation(s) in RCA: 162] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
![]()
The
first near-infrared fluorescent turn-on sensor for the detection
of nitroxyl (HNO), the one-electron reduced form of nitric oxide (NO),
is reported. The new copper-based probe, CuDHX1, contains a dihydroxanthene
(DHX) fluorophore and a cyclam derivative as a Cu(II) binding site.
Upon reaction with HNO, CuDHX1 displays a five-fold fluorescence turn-on
in cuvettes and is selective for HNO over thiols and reactive nitrogen
and oxygen species. CuDHX1 can detect exogenously applied HNO in live
mammalian cells and in conjunction with the zinc-specific, green-fluorescent
sensor ZP1 can perform multicolor/multianalyte microscopic imaging.
These studies reveal that HNO treatment elicits an increase in the
concentration of intracellular mobile zinc.
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Affiliation(s)
- Alexandra T Wrobel
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
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38
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Bruemmer KJ, Merrikhihaghi S, Lollar CT, Morris SNS, Bauer JH, Lippert AR. 19F magnetic resonance probes for live-cell detection of peroxynitrite using an oxidative decarbonylation reaction. Chem Commun (Camb) 2014; 50:12311-4. [DOI: 10.1039/c4cc04292a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We have developed 19F NMR probes for non-invasive monitoring of ONOO− produced by A549 cells using novel oxidative decarbonylation chemistry.
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Affiliation(s)
| | | | | | | | - Johannes H. Bauer
- Department of Biological Sciences
- Southern Methodist University
- Dallas, USA
- Center for Drug Discovery
- Design, and Delivery (CD4)
| | - Alexander R. Lippert
- Department of Chemistry
- Southern Methodist University
- Dallas, USA
- Center for Drug Discovery
- Design, and Delivery (CD4)
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39
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Zhang D, Macinkovic I, Devarie-Baez NO, Pan J, Park CM, Carroll KS, Filipovic MR, Xian M. Detection of protein S-sulfhydration by a tag-switch technique. Angew Chem Int Ed Engl 2013; 53:575-81. [PMID: 24288186 DOI: 10.1002/anie.201305876] [Citation(s) in RCA: 211] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2013] [Indexed: 01/08/2023]
Abstract
Protein S-sulfhydration (forming -S-SH adducts from cysteine residues) is a newly defined oxidative posttranslational modification and plays an important role in H2 S-mediated signaling pathways. In this study we report the first selective, "tag-switch" method which can directly label protein S-sulfhydrated residues by forming stable thioether conjugates. Furthermore we demonstrate that H2 S alone cannot lead to S-sulfhydration and that the two possible physiological mechanisms include reaction with protein sulfenic acids (P-SOH) or the involvement of metal centers which would facilitate the oxidation of H2 S to HS(.) .
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Affiliation(s)
- Dehui Zhang
- Department of Chemistry, Washington State University, Pullman, WA 99164 (USA)
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40
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Zhang D, Macinkovic I, Devarie-Baez NO, Pan J, Park CM, Carroll KS, Filipovic MR, Xian M. Detektion von Persulfidbildung an Proteinen (S-Sulfhydrierung) mithilfe einer Tag-Switch-Technik. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305876] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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41
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Sabbah HN, Tocchetti CG, Wang M, Daya S, Gupta RC, Tunin RS, Mazhari R, Takimoto E, Paolocci N, Cowart D, Colucci WS, Kass DA. Nitroxyl (HNO): A novel approach for the acute treatment of heart failure. Circ Heart Fail 2013; 6:1250-8. [PMID: 24107588 DOI: 10.1161/circheartfailure.113.000632] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND The nitroxyl (HNO) donor, Angeli's salt, exerts positive inotropic, lusitropic, and vasodilator effects in vivo that are cAMP independent. Its clinical usefulness is limited by chemical instability and cogeneration of nitrite which itself has vascular effects. Here, we report on effects of a novel, stable, pure HNO donor (CXL-1020) in isolated myoctyes and intact hearts in experimental models and in patients with heart failure (HF). METHODS AND RESULTS CXL-1020 converts solely to HNO and inactive CXL-1051 with a t1/2 of 2 minutes. In adult mouse ventricular myocytes, it dose dependently increased sarcomere shortening by 75% to 210% (50-500 μmol/L), with a ≈30% rise in the peak Ca(2+) transient only at higher doses. Neither inhibition of protein kinase A nor soluble guanylate cyclase altered this contractile response. Unlike isoproterenol, CXL-1020 was equally effective in myocytes from normal or failing hearts. In anesthetized dogs with coronary microembolization-induced HF, CXL-1020 reduced left ventricular end-diastolic pressure and myocardial oxygen consumption while increasing ejection fraction from 27% to 40% and maximal ventricular power index by 42% (both P<0.05). In conscious dogs with tachypacing-induced HF, CXL-1020 increased contractility assessed by end-systolic elastance and provided venoarterial dilation. Heart rate was minimally altered. In patients with systolic HF, CXL-1020 reduced both left and right heart filling pressures and systemic vascular resistance, while increasing cardiac and stroke volume index. Heart rate was unchanged, and arterial pressure declined modestly. CONCLUSIONS These data show the functional efficacy of a novel pure HNO donor to enhance myocardial function and present first-in-man evidence for its potential usefulness in HF. CLINICAL TRIAL REGISTRATION URL: http://www.clinicaltrials.gov. Unique identifiers: NCT01096043, NCT01092325.
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Affiliation(s)
- Hani N Sabbah
- Department of Medicine, Division of Cardiovascular Medicine, Henry Ford Hospital, Detroit, MI
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42
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Miljkovic JL, Kenkel I, Ivanović-Burmazović I, Filipovic MR. Generation of HNO and HSNO from Nitrite by Heme-Iron-Catalyzed Metabolism with H2S. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305669] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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43
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Miljkovic JL, Kenkel I, Ivanović-Burmazović I, Filipovic MR. Generation of HNO and HSNO from Nitrite by Heme-Iron-Catalyzed Metabolism with H2S. Angew Chem Int Ed Engl 2013; 52:12061-4. [DOI: 10.1002/anie.201305669] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Indexed: 01/30/2023]
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Suárez SA, Bikiel DE, Wetzler DE, Martí MA, Doctorovich F. Time-Resolved Electrochemical Quantification of Azanone (HNO) at Low Nanomolar Level. Anal Chem 2013; 85:10262-9. [DOI: 10.1021/ac402134b] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sebastián A. Suárez
- Departamento
de Química Inorgánica, Analítica
y Química Física/INQUIMAE-CONICET, and ‡Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA, Buenos Aires, Argentina
| | - Damian E. Bikiel
- Departamento
de Química Inorgánica, Analítica
y Química Física/INQUIMAE-CONICET, and ‡Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA, Buenos Aires, Argentina
| | - Diana E. Wetzler
- Departamento
de Química Inorgánica, Analítica
y Química Física/INQUIMAE-CONICET, and ‡Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA, Buenos Aires, Argentina
| | - Marcelo A. Martí
- Departamento
de Química Inorgánica, Analítica
y Química Física/INQUIMAE-CONICET, and ‡Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA, Buenos Aires, Argentina
| | - Fabio Doctorovich
- Departamento
de Química Inorgánica, Analítica
y Química Física/INQUIMAE-CONICET, and ‡Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA, Buenos Aires, Argentina
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Bellavia L, DuMond JF, Perlegas A, Bruce King S, Kim-Shapiro DB. Nitroxyl accelerates the oxidation of oxyhemoglobin by nitrite. Nitric Oxide 2013; 31:38-47. [PMID: 23545404 DOI: 10.1016/j.niox.2013.03.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 03/19/2013] [Accepted: 03/22/2013] [Indexed: 11/25/2022]
Abstract
Angeli's salt (Na₂N₂O₃) decomposes into nitroxyl (HNO) and nitrite (NO₂(-)), compounds of physiological and therapeutic interest for their impact on biological signaling both through nitric oxide and nitric oxide independent pathways. Both nitrite and HNO oxidize oxygenated hemoglobin to methemoglobin. Earlier work has shown that HNO catalyzes the reduction of nitrite by deoxygenated hemoglobin. In this work, we have shown that HNO accelerates the oxidation of oxygenated hemoglobin by NO₂(-). We have demonstrated this HNO mediated acceleration of the nitrite/oxygenated hemoglobin reaction with oxygenated hemoglobin being in excess to HNO and nitrite (as would be found under physiological conditions) by monitoring the formation of methemoglobin in the presence of Angeli's salt with and without added NO₂(-). In addition, this acceleration has been demonstrated using the HNO donor 4-nitrosotetrahydro-2H-pyran-4-yl pivalate, a water-soluble acyloxy nitroso compound that does not release NO₂(-) but generates HNO in the presence of esterase. This HNO donor was used both with and without NO₂(-) and acceleration of the NO₂(-) induced formation of methemoglobin was observed. We found that the acceleration was not substantially affected by catalase, superoxide dismutase, c-PTIO, or IHP, suggesting that it is not due to formation of extramolecular peroxide, NO₂ or H₂O₂, or to modulation of allosteric properties. In addition, we found that the acceleration is not likely to be related to HNO binding to free reduced hemoglobin, as we found HNO binding to reduced hemoglobin to be much weaker than has previously been proposed. We suggest that the mechanism of the acceleration involves local propagation of autocatalysis in the nitrite-oxygenated Hb reaction. This acceleration of the nitrite oxyhemoglobin reaction could affect studies aimed at understanding physiological roles of HNO and perhaps nitrite and use of these agents in therapeutics such as hemolytic anemias, heart failure, and ischemia reperfusion injury.
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Affiliation(s)
- Landon Bellavia
- Department of Physics, Wake Forest University, Winston-Salem, NC 27109, USA
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46
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Controlled release of HNO from chemical donors for biological applications. J Inorg Biochem 2012; 118:187-90. [PMID: 23140899 DOI: 10.1016/j.jinorgbio.2012.10.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Revised: 10/02/2012] [Accepted: 10/04/2012] [Indexed: 11/21/2022]
Abstract
Nitroxyl (HNO) is a small molecule with various pharmacological effects, including cardioprotective action. It is thought to serve as a modulator of various biochemical pathways. But, it is difficult to apply HNO directly for biological experiments or therapeutic treatment because it is highly reactive, readily dimerizing or reacting with biological targets under ambient conditions. Therefore, HNO donor molecules that release HNO under physiological conditions, especially those that allow precisely controllable release, would be useful to study the activities of HNO at the cellular level. This short review focuses on recently developed photocontrollable HNO-releasing compounds, which are expected to be suitable for achieving site-specific and temporally controlled HNO release in biomedical investigations. An illustrative application for the study of HNO-mediated upregulation of calcitonin gene-related peptide (CGRP) in A549 cells is described.
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DuMond JF, Wright MW, King SB. Water soluble acyloxy nitroso compounds: HNO release and reactions with heme and thiol containing proteins. J Inorg Biochem 2012; 118:140-7. [PMID: 23083700 DOI: 10.1016/j.jinorgbio.2012.07.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Revised: 07/07/2012] [Accepted: 07/09/2012] [Indexed: 11/17/2022]
Abstract
Nitroxyl (HNO) has gained interest as a potential treatment of congestive heart failure through the ability of the HNO donor, Angeli's salt (AS), to evoke positive inotropic effects in canine cardiac muscle. The release of nitrite during decomposition limits the use of AS requiring other HNO sources. Acyloxy nitroso compounds liberate HNO and small amounts of nitrite upon hydrolysis and the synthesis of the water-soluble 4-nitrosotetrahydro-2H-pyran-4-yl acetate and pivalate allows for pig liver esterase (PLE)-catalysis increasing the rate of decomposition and HNO release. The pivalate derivative does not release HNO, but the addition of PLE catalyzes hydrolysis (t(1/2)=39 min) and HNO formation (65% after 30 min). In the presence of PLE, this compound converts metmyoglobin (MetMb) to iron nitrosyl Mb and oxyMb to metMb indicating that these compounds only react with heme proteins as HNO donors. The pivalate in the presence and the absence of PLE inhibits aldehyde dehydrogenase (ALDH) with IC(50) values of 3.5 and 3.3 μM, respectively, in a time-dependent manner. Reversibility assays reveal reversible inhibition of ALDH in the absence of PLE and partially irreversible inhibition with PLE. Liquid chromatography-mass spectrometry (LC-MS) reveals formation of a disulfide upon incubation of an ALDH peptide without PLE and a mixture of disulfide and sulfinamide in the presence of PLE. A dehydroalanine residue forms upon incubation of this peptide with excess AS. These results identify acyloxy nitroso compounds as unique HNO donors capable of thiol modification through direct electrophilic reaction or HNO release.
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Affiliation(s)
- Jenna F DuMond
- Department of Chemistry, Wake Forest University, Winston-Salem, NC 27109, USA
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Zgheib C, Kurdi M, Zouein FA, Gunter BW, Stanley BA, Zgheib J, Romero DG, King SB, Paolocci N, Booz GW. Acyloxy nitroso compounds inhibit LIF signaling in endothelial cells and cardiac myocytes: evidence that STAT3 signaling is redox-sensitive. PLoS One 2012; 7:e43313. [PMID: 22905257 PMCID: PMC3419695 DOI: 10.1371/journal.pone.0043313] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2012] [Accepted: 07/19/2012] [Indexed: 12/31/2022] Open
Abstract
We previously showed that oxidative stress inhibits leukemia inhibitory factor (LIF) signaling by targeting JAK1, and the catalytic domains of JAK 1 and 2 have a cysteine-based redox switch. Thus, we postulated that the NO sibling and thiophylic compound, nitroxyl (HNO), would inhibit LIF-induced JAK-STAT3 activation. Pretreatment of human microvascular endothelial cells (HMEC-1) or neonatal rat cardiomyocytes with the HNO donors Angeli’s salt or nitrosocyclohexyl acetate (NCA) inhibited LIF-induced STAT3 activation. NCA pretreatment also blocked the induction of downstream inflammatory genes (e.g. intercellular adhesion molecule 1, CCAAT/enhancer binding protein delta). The related 1-nitrosocyclohexyl pivalate (NCP; not a nitroxyl donor) was equally effective in inhibiting STAT3 activation, suggesting that these compounds act as thiolate targeting electrophiles. The JAK1 redox switch is likely not a target of acyloxy nitroso compounds, as NCA had no effect on JAK1 catalytic activity and only modestly affected JAK1-induced phosphorylation of the LIF receptor. However, pretreatment of recombinant human STAT3 with NCA or NCP reduced labeling of free sulfhydryl residues. We show that NCP in the presence of diamide enhanced STAT3 glutathionylation and dimerization in adult mouse cardiac myocytes and altered STAT3 under non-reducing conditions. Finally, we show that monomeric STAT3 levels are decreased in the Gαq model of heart failure in a redox-sensitive manner. Altogether, our evidence indicates that STAT3 has redox-sensitive cysteines that regulate its activation and are targeted by HNO donors and acyloxy nitroso compounds. These findings raise the possibility of new therapeutic strategies to target STAT3 signaling via a redox-dependent manner, particularly in the context of cardiac and non-cardiac diseases with prominent pro-inflammatory signaling.
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Affiliation(s)
- Carlos Zgheib
- Departments of Pharmacology and Toxicology, School of Medicine, and Center for Excellence in Cardiovascular-Renal Research, The University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - Mazen Kurdi
- Department of Chemistry and Biochemistry, Faculty of Sciences, Lebanese University, Rafic Hariri Educational Campus, Hadath, Lebanon
| | - Fouad A. Zouein
- Departments of Pharmacology and Toxicology, School of Medicine, and Center for Excellence in Cardiovascular-Renal Research, The University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - Barak W. Gunter
- Departments of Pharmacology and Toxicology, School of Medicine, and Center for Excellence in Cardiovascular-Renal Research, The University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - Brian A. Stanley
- Division of Cardiology, Johns Hopkins Medical Institutions, Baltimore, Maryland, United States of America
| | - Joe Zgheib
- Department of Medicine, Division of Cardiology, Centre Hospitalier Universitaire de Nancy, Brabois, France
| | - Damian G. Romero
- Department of Biochemistry, School of Medicine, and Center for Excellence in Cardiovascular-Renal Research, The University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - S. Bruce King
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina, United States of America
| | - Nazareno Paolocci
- Division of Cardiology, Johns Hopkins Medical Institutions, Baltimore, Maryland, United States of America
- Clinical Medicine Department, Section of General Pathology, University of Perugia, Perugia, Italy
| | - George W. Booz
- Departments of Pharmacology and Toxicology, School of Medicine, and Center for Excellence in Cardiovascular-Renal Research, The University of Mississippi Medical Center, Jackson, Mississippi, United States of America
- * E-mail:
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Filipovic MR, Miljkovic JL, Nauser T, Royzen M, Klos K, Shubina T, Koppenol WH, Lippard SJ, Ivanović-Burmazović I. Chemical characterization of the smallest S-nitrosothiol, HSNO; cellular cross-talk of H2S and S-nitrosothiols. J Am Chem Soc 2012; 134:12016-27. [PMID: 22741609 PMCID: PMC3408084 DOI: 10.1021/ja3009693] [Citation(s) in RCA: 268] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Indexed: 01/20/2023]
Abstract
Dihydrogen sulfide recently emerged as a biological signaling molecule with important physiological roles and significant pharmacological potential. Chemically plausible explanations for its mechanisms of action have remained elusive, however. Here, we report that H(2)S reacts with S-nitrosothiols to form thionitrous acid (HSNO), the smallest S-nitrosothiol. These results demonstrate that, at the cellular level, HSNO can be metabolized to afford NO(+), NO, and NO(-) species, all of which have distinct physiological consequences of their own. We further show that HSNO can freely diffuse through membranes, facilitating transnitrosation of proteins such as hemoglobin. The data presented in this study explain some of the physiological effects ascribed to H(2)S, but, more broadly, introduce a new signaling molecule, HSNO, and suggest that it may play a key role in cellular redox regulation.
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Affiliation(s)
- Milos R Filipovic
- Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, 91058 Erlangen, Germany.
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Sutton AD, Williamson M, Weismiller H, Toscano JP. Optimization of HNO production from N,O-bis-acylated hydroxylamine derivatives. Org Lett 2011; 14:472-5. [PMID: 22196028 DOI: 10.1021/ol203016c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A wide range of N,O-bis-acylated hydroxylamine derivatives with chloro or arenesulfonyl leaving groups, and a related set of N-hydroxy-N-acylsulfonamides, have been synthesized and evaluated for nitroxyl (HNO) production. Mechanistic studies have revealed that the observed aqueous chemistry is more complicated than originally anticipated, and have been used to develop a new series of efficient HNO precursors (4u-4x, 7c-7d) with tunable half-lives.
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Affiliation(s)
- Art D Sutton
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, USA
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