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Ratnam A, Kumari S, Singh S, Mawai K, Kumar R, Singh UP, Ghosh K. Unprecedented cleavage of -N-N- bond of ligand and phenyl ring nitration during nitric oxide (NO) reactivity studies: new ruthenium nitrosyl complex and photoinduced liberation of NO. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2141115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Anand Ratnam
- Department of Chemistry, DDU Gorakhpur University, Gorakhpur, India
| | - Sheela Kumari
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
| | - Sain Singh
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
| | - Kiran Mawai
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
| | - Rajan Kumar
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
| | - U. P. Singh
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
| | - Kaushik Ghosh
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
- Department of Bioscience and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
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2
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Lehnert N, Kim E, Dong HT, Harland JB, Hunt AP, Manickas EC, Oakley KM, Pham J, Reed GC, Alfaro VS. The Biologically Relevant Coordination Chemistry of Iron and Nitric Oxide: Electronic Structure and Reactivity. Chem Rev 2021; 121:14682-14905. [PMID: 34902255 DOI: 10.1021/acs.chemrev.1c00253] [Citation(s) in RCA: 96] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Nitric oxide (NO) is an important signaling molecule that is involved in a wide range of physiological and pathological events in biology. Metal coordination chemistry, especially with iron, is at the heart of many biological transformations involving NO. A series of heme proteins, nitric oxide synthases (NOS), soluble guanylate cyclase (sGC), and nitrophorins, are responsible for the biosynthesis, sensing, and transport of NO. Alternatively, NO can be generated from nitrite by heme- and copper-containing nitrite reductases (NIRs). The NO-bearing small molecules such as nitrosothiols and dinitrosyl iron complexes (DNICs) can serve as an alternative vehicle for NO storage and transport. Once NO is formed, the rich reaction chemistry of NO leads to a wide variety of biological activities including reduction of NO by heme or non-heme iron-containing NO reductases and protein post-translational modifications by DNICs. Much of our understanding of the reactivity of metal sites in biology with NO and the mechanisms of these transformations has come from the elucidation of the geometric and electronic structures and chemical reactivity of synthetic model systems, in synergy with biochemical and biophysical studies on the relevant proteins themselves. This review focuses on recent advancements from studies on proteins and model complexes that not only have improved our understanding of the biological roles of NO but also have provided foundations for biomedical research and for bio-inspired catalyst design in energy science.
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Affiliation(s)
- Nicolai Lehnert
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Eunsuk Kim
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Hai T Dong
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Jill B Harland
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Andrew P Hunt
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Elizabeth C Manickas
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Kady M Oakley
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - John Pham
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Garrett C Reed
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Victor Sosa Alfaro
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
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3
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Merabet L, Tassé M, Mallet-Ladeira S, Kaboub L, Malfant I. Crystal structure of 1,1'-(pyridine-2,6-di-yl)bis-[ N-(pyridin-2-ylmeth-yl)methanaminium] dichloride dihydrate. Acta Crystallogr E Crystallogr Commun 2021; 77:1296-1298. [PMID: 34925901 PMCID: PMC8647756 DOI: 10.1107/s205698902101183x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 11/08/2021] [Indexed: 06/14/2023]
Abstract
In the title compound, C19H23N5 2+·2Cl-·2H2O, the two pyridine side arms are not coplanar, with the terminal pyridine rings subtending a dihedral angle of 26.45 (6)°. In the crystal, hydrogen bonds, inter-molecular C-H⋯Cl contacts and a weak C-H⋯O inter-action connect the mol-ecule with neighbouring chloride counter-anions and lattice water mol-ecules. The crystal packing also features by π-π inter-actions with centroid-centroid distances of 3.4864 (12) and 3.5129 (13) Å.
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Affiliation(s)
- Layachi Merabet
- Laboratoire de Chimie de Coordination, UPR-CNRS 8241, 205 route de Narbonne, 31077 Toulouse cedex, France
- Laboratory of Chemistry, Molecular Engineering and Nanostructures, Department of Chemistry, Faculty of Sciences, University of Ferhat Abbas-Sétif -1, 19000 Sétif, Algeria
| | - Marine Tassé
- Laboratoire de Chimie de Coordination, UPR-CNRS 8241, 205 route de Narbonne, 31077 Toulouse cedex, France
| | - Sonia Mallet-Ladeira
- Laboratoire de Chimie de Coordination, UPR-CNRS 8241, 205 route de Narbonne, 31077 Toulouse cedex, France
- Institut de Chimie de Toulouse UAR-CNRS 2599, 118 route de Narbonne, 31062 Toulouse Cedex 09, France
| | - Lakhemici Kaboub
- Laboratory of Chemistry, Molecular Engineering and Nanostructures, Department of Chemistry, Faculty of Sciences, University of Ferhat Abbas-Sétif -1, 19000 Sétif, Algeria
| | - Isabelle Malfant
- Laboratoire de Chimie de Coordination, UPR-CNRS 8241, 205 route de Narbonne, 31077 Toulouse cedex, France
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Silva Filho PM, Paz IA, Nascimento NRF, Santos CF, Araújo VR, Aquino CP, Ribeiro TS, Vasconcelos IF, Lopes LGF, Sousa EHS, Longhinotti E. Incorporation of Nitroprusside on Silica Nanoparticles-A Strategy for Safer Use of This NO Donor in Therapy. Mol Pharm 2019; 16:2912-2921. [PMID: 31083895 DOI: 10.1021/acs.molpharmaceut.9b00110] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Silica-based nanoparticles have been developed as powerful platforms for drug delivery and might also prevent undesired side effects of drugs. Here, a fast method to synthesize positively charged mesoporous silica nanoparticles (ζ = 20 ± 0.5 mV, surface area = 678 m2 g-1, and 2.3 nm of porous size) was reported. This nanomaterial was employed to anchor sodium nitroprusside (SNP), a vasodilator drug with undesired cyanide release. A remarkable incorporation of 323.9 ± 7.55 μmol of SNP per gram of nanoparticle was achieved, and a series of studies of NO release were conducted, showing efficient release of NO along with major cyanide retention (ca. 64% bound to nanoparticle). Biological assays with mammalian cells showed only a slight drop in cell viability (13%) at the highest concentration (1000 μM), while SNP exhibited an LC50 of 228 μM. Moreover, pharmacological studies demonstrated similar efficacy for vasodilation and sGC-PKG-VASP pathway activation when compared to SNP alone. Altogether, this new SNP silica nanoparticle has great potential as an alternative for wider and safer use of SNP in medicine with lower cyanide toxicity.
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Affiliation(s)
- Pedro M Silva Filho
- Departamento de Química Analítica e Físico-Química , Universidade Federal do Ceará , 60440-900 Fortaleza , Ceará , Brazil
| | - Iury A Paz
- Departamento de Quımica Orgânica e Inorgânica , Universidade Federal do Ceará , Cx. Postal 6021, 60440-900 Fortaleza , Ceará , Brazil
| | - Nilberto R F Nascimento
- Instituto Superior de Ciências Biomédicas , Universidade Estadual do Ceará , 60714-110 Fortaleza , Ceará , Brazil
| | - Cláudia F Santos
- Instituto Superior de Ciências Biomédicas , Universidade Estadual do Ceará , 60714-110 Fortaleza , Ceará , Brazil
| | - Valdevane R Araújo
- Instituto Superior de Ciências Biomédicas , Universidade Estadual do Ceará , 60714-110 Fortaleza , Ceará , Brazil
| | - Camila P Aquino
- Instituto Superior de Ciências Biomédicas , Universidade Estadual do Ceará , 60714-110 Fortaleza , Ceará , Brazil
| | - T S Ribeiro
- Departamento de Engenharia Metalúrgica e de Materiais , Universidade Federal do Ceará , 60440-554 Fortaleza , Ceará , Brazil
| | - Igor F Vasconcelos
- Departamento de Engenharia Metalúrgica e de Materiais , Universidade Federal do Ceará , 60440-554 Fortaleza , Ceará , Brazil
| | - Luiz G F Lopes
- Departamento de Quımica Orgânica e Inorgânica , Universidade Federal do Ceará , Cx. Postal 6021, 60440-900 Fortaleza , Ceará , Brazil
| | - Eduardo H S Sousa
- Departamento de Quımica Orgânica e Inorgânica , Universidade Federal do Ceará , Cx. Postal 6021, 60440-900 Fortaleza , Ceará , Brazil
| | - Elisane Longhinotti
- Departamento de Química Analítica e Físico-Química , Universidade Federal do Ceará , 60440-900 Fortaleza , Ceará , Brazil
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5
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Nitric oxide photo-release from a ruthenium nitrosyl complex with a 4,4′-bisfluorenyl-2,2′-bipyridine ligand. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.05.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Xiang HJ, Guo M, Liu JG. Transition-Metal Nitrosyls for Photocontrolled Nitric Oxide Delivery. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601135] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Hui-Jing Xiang
- School of Chemistry and Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
| | - Min Guo
- School of Chemistry and Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
| | - Jin-Gang Liu
- School of Chemistry and Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
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Akl J, Sasaki I, Lacroix PG, Malfant I, Mallet-Ladeira S, Vicendo P, Farfán N, Santillan R. Comparative photo-release of nitric oxide from isomers of substituted terpyridinenitrosylruthenium(II) complexes: experimental and computational investigations. Dalton Trans 2015; 43:12721-33. [PMID: 25011547 DOI: 10.1039/c4dt00974f] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The 4'-(2-fluorenyl)-2,2':6',2''-terpyridine (FT) ligand and its cis(Cl,Cl)- and trans(Cl,Cl)-[Ru(II)(FT)Cl2(NO)](PF6) complexes have been synthesized. Both isomers were separated by HPLC and fully characterized by (1)H and (13)C NMR. The X-ray diffraction crystal structures were solved for FT (Pna21 space group, a = 34.960(4), b = 5.9306(7), c = 9.5911(10) Å), and trans(Cl,Cl)-[Ru(II)(FT)Cl2(NO)](PF6)·MeOH (P1[combining macron] space group, a = 10.3340(5), b = 13.0961(6), c = 13.2279(6) Å, α = 72.680(2), β = 70.488(2), γ = 67.090(2)°). Photo-release of NO˙ radicals occurs under irradiation at 405 nm, with a quantum yield of 0.31 and 0.10 for cis(Cl,Cl)-[Ru(II)(FT)Cl2(NO)](PF6) and trans(Cl,Cl)-[Ru(II)(FT)Cl2(NO)](PF6), respectively. This significant difference is likely due to the trans effect of Cl(-), which favors the photo-release. UV-visible spectroscopy and cyclic voltammetry indicate the formation of ruthenium(iii) species as photoproducts. A density functional theory (DFT) analysis provides a rationale for the understanding of the photo-physical properties, and allows relating the weakening of the Ru-NO bond, and finally the photo-dissociation, to HOMO → LUMO excitations.
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Affiliation(s)
- Joëlle Akl
- Laboratoire de Chimie de Coordination du CNRS, 205 route de Narbonne, F-31077 Toulouse, France.
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8
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Zheng W, Wu S, Zhao S, Geng Y, Jin J, Su Z, Fu Q. Carbonyl Amine/Schiff Base Ligands in Manganese Complexes: Theoretical Study on the Mechanism, Capability of NO Release. Inorg Chem 2012; 51:3972-80. [DOI: 10.1021/ic2011953] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Weili Zheng
- Institute of Functional Material Chemistry, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People’s Republic of China
| | - Shuixing Wu
- Institute of Functional Material Chemistry, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People’s Republic of China
| | - Shanshan Zhao
- Institute of Functional Material Chemistry, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People’s Republic of China
| | - Yun Geng
- Institute of Functional Material Chemistry, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People’s Republic of China
| | - Junling Jin
- Institute of Functional Material Chemistry, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People’s Republic of China
| | - Zhongmin Su
- Institute of Functional Material Chemistry, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People’s Republic of China
| | - Qiang Fu
- Institute of Functional Material Chemistry, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People’s Republic of China
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9
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Merkle AC, McQuarters AB, Lehnert N. Synthesis, spectroscopic analysis and photolabilization of water-soluble ruthenium(iii)–nitrosyl complexes. Dalton Trans 2012; 41:8047-59. [DOI: 10.1039/c2dt30464c] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Gonzalez MA, Yim MA, Cheng S, Moyes A, Hobbs AJ, Mascharak PK. Manganese Carbonyls Bearing Tripodal Polypyridine Ligands as Photoactive Carbon Monoxide-Releasing Molecules. Inorg Chem 2011; 51:601-8. [DOI: 10.1021/ic2021287] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Margarita A. Gonzalez
- Department of Chemistry and
Biochemistry, University of California,
Santa Cruz, California 95064, United States
| | - Melanie A. Yim
- Department of Chemistry and
Biochemistry, University of California,
Santa Cruz, California 95064, United States
| | - Stephanie Cheng
- Department of Pharmacology, University College, London WC1E 6BT, U.K
| | - Amie Moyes
- Department of Pharmacology, University College, London WC1E 6BT, U.K
| | - Adrian J. Hobbs
- Department of Pharmacology, University College, London WC1E 6BT, U.K
| | - Pradip K. Mascharak
- Department of Chemistry and
Biochemistry, University of California,
Santa Cruz, California 95064, United States
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Merkle AC, Fry NL, Mascharak PK, Lehnert N. Mechanism of NO Photodissociation in Photolabile Manganese–NO Complexes with Pentadentate N5 Ligands. Inorg Chem 2011; 50:12192-203. [DOI: 10.1021/ic201967f] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Anna C. Merkle
- Department of Chemistry, University of Michigan, 930 North University Avenue,
Ann Arbor, Michigan 48109-1055, United States
| | - Nicole L. Fry
- Department of Chemistry and
Biochemistry, University of California,
Santa Cruz, California 95064, United States
| | - Pradip K. Mascharak
- Department of Chemistry and
Biochemistry, University of California,
Santa Cruz, California 95064, United States
| | - Nicolai Lehnert
- Department of Chemistry, University of Michigan, 930 North University Avenue,
Ann Arbor, Michigan 48109-1055, United States
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Fry NL, Wei J, Mascharak PK. Triggered Dye Release via Photodissociation of Nitric Oxide from Designed Ruthenium Nitrosyls: Turn-ON Fluorescence Signaling of Nitric Oxide Delivery. Inorg Chem 2011; 50:9045-52. [DOI: 10.1021/ic201242d] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Nicole L. Fry
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States
| | - Julia Wei
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States
| | - Pradip K. Mascharak
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States
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Gonzalez MA, Fry NL, Burt R, Davda R, Hobbs A, Mascharak PK. Designed iron carbonyls as carbon monoxide (CO) releasing molecules: rapid CO release and delivery to myoglobin in aqueous buffer, and vasorelaxation of mouse aorta. Inorg Chem 2011; 50:3127-34. [PMID: 21384844 PMCID: PMC3073858 DOI: 10.1021/ic2000848] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The physiological roles of CO in neurotransmission, vasorelaxation, and cytoprotective activities have raised interest in the design and syntheses of CO-releasing materials (CORMs) that could be employed to modulate such biological pathways. Three iron-based CORMs, namely, [(PaPy(3))Fe(CO)](ClO(4)) (1), [(SBPy(3))Fe(CO)](BF(4))(2) (2), and [(Tpmen)Fe(CO)](ClO(4))(2) (3), derived from designed polypyridyl ligands have been synthesized and characterized by spectroscopy and X-ray crystallography. In these three Fe(II) carbonyls, the CO is trans to a carboxamido-N (in 1), an imine-N (in 2), and a tertiary amine-N (in 3), respectively. This structural feature has been correlated to the strength of the Fe-CO bond. The CO-releasing properties of all three carbonyls have been studied in various solvents under different experimental conditions. Rapid release of CO is observed with 2 and 3 upon dissolution in both aqueous and nonaqueous media in the presence and absence of dioxygen. With 1, CO release is observed only under aerobic conditions, and the final product is an oxo-bridged diiron species while with 2 and 3, the solvent bound [(L)Fe(CO)](2+) (where L = SBPy(3) or Tpmen) results upon loss of CO under both aerobic and anaerobic conditions. The apparent rates of CO loss by these CORMs are comparable to other CORMs such as [Ru(glycine)(CO)(3)Cl] reported recently. Facile delivery of CO to reduced myoglobin has been observed with both 2 and 3. In tissue bath experiments, 2 and 3 exhibit rapid vasorelaxation of mouse aorta muscle rings. Although the relaxation effect is not inhibited by the soluble guanylate cyclase inhibitor ODQ, significant inhibition is observed with the BK(Ca) channel blocker iberiotoxin.
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Affiliation(s)
- Margarita A. Gonzalez
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064
| | - Nicole L. Fry
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064
| | - Richard Burt
- Department of Pharmacology, University College, London, WC1E 6BT
| | - Riddhi Davda
- Department of Pharmacology, University College, London, WC1E 6BT
| | - Adrian Hobbs
- Department of Pharmacology, University College, London, WC1E 6BT
| | - Pradip K. Mascharak
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064
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14
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Stasicka Z. Transition metal complexes as solar photocatalysts in the environment. ADVANCES IN INORGANIC CHEMISTRY 2011. [DOI: 10.1016/b978-0-12-385904-4.00004-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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15
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Seabra AB, Durán N. Nitric oxide-releasing vehicles for biomedical applications. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b912493b] [Citation(s) in RCA: 184] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Hoffman-Luca CG, Eroy-Reveles AA, Alvarenga J, Mascharak PK. Syntheses, structures, and photochemistry of manganese nitrosyls derived from designed Schiff base ligands: potential NO donors that can be activated by near-infrared light. Inorg Chem 2009; 48:9104-11. [PMID: 19722518 PMCID: PMC4826278 DOI: 10.1021/ic900604j] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Two manganese nitrosyls, namely, [Mn(SBPy(3))(NO)](ClO(4))(2) (1) and [Mn(SBPy(2)Q)(NO)](ClO(4))(2) (2), have been synthesized by using designed pentadentate Schiff base ligands N,N-bis(2-pyridylmethyl)amine-N-ethyl-2-pyridine-2-aldimine (SBPy(3)) and N,N-bis(2-pyridyl methyl)amine-N-ethyl-2-quinoline-2-aldimine (SBPy(2)Q). Reaction of NO(g) with [Mn(SBPy(3))(MeOH)](ClO(4))(2) and [Mn(SBPy(2)Q)(EtOH)](ClO(4))(2) in MeCN affords 1 and 2, respectively, in good yields. Narrow-width peaks in the (1)H NMR spectra and strong nu(NO) at 1773 cm(-1) (of 1) and 1759 cm(-1) (of 2) confirm a strongly coupled {low-spin Mn(II)-NO*}formulation for both these {Mn-NO}(6) nitrosyls. In MeCN, 1 exhibits two strong absorption bands with lambda(max) at 500 and 720 nm. These bands red shift to 550 and 785 nm in case of 2 because of substitution of the pyridyl-imine moiety of SBPy(3) with quinolyl-imine moiety in the SBPy(2)Q ligand frame. Exposure of solutions 1 and 2 to near-infrared (NIR) light (780 nm, 5 mW) results in rapid bleaching of the orange and fuchsia solutions, and free NO is detected in the solutions by an NO-sensitive electrode. The high quantum yield values (Phi) of 1 (0.580 +/- 0.010, lambda(irr) = 550 nm, MeCN) and 2 (0.434 +/- 0.010, lambda(irr) = 550 nm, MeCN) and in particular their sensitivity to NIR light of 800-950 nm range strongly suggest that these designed manganese nitrosyls could be used as NIR light-triggered NO donors.
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Affiliation(s)
- C Gianna Hoffman-Luca
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, USA
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Chang HH, Huang HJ, Ho YL, Wen YD, Huang WN, Chiou SJ. The water-soluble Roussin's red ester acting as a potential photochemical NO-delivery agent: Photolysis reactions, DNA cleavage and anticancer activity. Dalton Trans 2009:6396-402. [DOI: 10.1039/b902478f] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rose MJ, Fry NL, Marlow R, Hinck L, Mascharak PK. Sensitization of ruthenium nitrosyls to visible light via direct coordination of the dye resorufin: trackable NO donors for light-triggered NO delivery to cellular targets. J Am Chem Soc 2008; 130:8834-46. [PMID: 18597437 DOI: 10.1021/ja801823f] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Three nitrosyl-dye conjugates, namely, [(Me 2bpb)Ru(NO)(Resf)] ( 1-Resf), [(Me 2bQb)Ru(NO)(Resf)] ( 2-Resf), and [((OMe) 2bQb)Ru(NO)(Resf)] ( 3-Resf) have been synthesized via direct replacement of the chloride ligand of the parent {Ru-NO} (6) nitrosyls of the type [(R 2byb)Ru(NO)(L)] with the anionic tricyclic dye resorufin (Resf). The structures of 1-Resf- 3-Resf have been determined by X-ray crystallography. The dye is coordinated to the ruthenium centers of these conjugates via the phenolato-O atom and is trans to NO. Systematic red shift of the d pi(Ru) --> pi*(NO) transition of the parent nitrosyls [(R 2byb)Ru(NO)(L)] due to changes in R and y in the equatorial tetradentate ligand R 2byb (2-) results in its eventual merge with the intense absorption band of the dye around 500 nm in 3-Resf. Unlike the UV-sensitive parent [(R 2byb)Ru(NO)(L)] nitrosyls, these dye-sensitized nitrosyls rapidly release NO when exposed to visible light (lambda >/= 465 nm). Comparison of the photochemical parameters reveals that direct coordination of the light-harvesting chromophore to the ruthenium center in the present nitrosyls results in a significantly greater extent of sensitization to visible light compared to nitrosyls with appended chromophore (linked via alkyl chains). 1-Resf has been employed as a "trackable" NO donor to promote NO-induced apoptosis in MDA-MB-231 human breast cancer cells under the control of light. The results of this work demonstrate that (a) the d pi(Ru) --> pi*(NO) transition (photoband) of {Ru-NO} (6) nitrosyls can be tuned into visible range via careful alteration of the ligand frame(s) and (b) such nitrosyls can be significantly sensitized to visible light by directly ligating a light-harvesting chromophore to the ruthenium center. The potential of these photosensitive nitrosyl-dye conjugates as (i) biological tools to study the effects of NO in cellular environments and (ii) "trackable" NO donors in photodynamic therapy of malignancies (such as skin cancer) has been discussed.
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Affiliation(s)
- Michael J Rose
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, USA.
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Rose MJ, Mascharak PK. Fiat Lux: selective delivery of high flux of nitric oxide (NO) to biological targets using photoactive metal nitrosyls. Curr Opin Chem Biol 2008; 12:238-44. [DOI: 10.1016/j.cbpa.2008.02.009] [Citation(s) in RCA: 121] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2007] [Revised: 01/30/2008] [Accepted: 02/07/2008] [Indexed: 12/25/2022]
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