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Features of the decomposition of the nitrosyl iron complex with thiourea ligands under aerobic conditions: experiment and kinetic and quantum chemical modeling. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3569-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Effect of solvents and glutathione on the decomposition of the nitrosyl iron complex with N-ethylthiourea ligands: An experimental and theoretical study. J Inorg Biochem 2022; 235:111926. [PMID: 35843200 DOI: 10.1016/j.jinorgbio.2022.111926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 06/24/2022] [Accepted: 07/04/2022] [Indexed: 11/22/2022]
Abstract
Dinitrosyl iron complexes (DNICs) are a depot and potential source of free NO in organisms. Their synthetic analog, N-ethylthiourea DNIC [Fe(SC(NH2)(NHC2H5))2(NO)2]+Cl-∙[Fe(SC(NH2)(NHC2H5))Cl(NO)2]0 (complex 1), as cardioprotective and cytostatic agent is a promising prodrug for the treatment of socially relevant diseases. In this work, transformation mechanism of complex 1 has been studied in anaerobic aqueous solution (pH = 7.0), DMSO, and ethanol. It was shown that the solvent has a significant effect on the decomposition of complex. According to EPR-spectroscopy, only cationic part of complex is found upon its dissolution in water; only neutral part is retained in DMSO, and both fragments are present in ethanol. Effective generation of NO occurs in an aqueous solution. The structures of the decomposition products were proposed for all solvents, their UV-spectra and rate constants were calculated. From the experimental and theoretical data obtained, it follows that complex 1 is most stable in DMSO. Solutions of complex in a DMSO-water mixture can be used to improve its bioavailability in further in vitro and in vivo studies. Also, we have analyzed its interaction with glutathione (GSH), which can participate in the metabolism of this compound. This study shows that complex 1 reacts with GSH to form a new binuclear DNIC with two GS--ligands. It was found that the resulting complex is a more prolonged NO-donor than the initial one: k = 6.1∙10-3·s-1 in buffer, k = 6.4∙10-5 s-1 with GSH. This reaction may prevent S-glutathionylation of the essential enzyme systems and is important for metabolism of complex, associated with its antitumor activity.
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Decomposition of dinitrosyl iron complex with thioformaldehyde ligands in water: reaction mechanisms and the role of chemical hardness of ligands. MENDELEEV COMMUNICATIONS 2022. [DOI: 10.1016/j.mencom.2022.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sanina NA, Sulimenkov IV, Emel'yanova NS, Konyukhova AS, Stupina TS, Balakina AA, Terent'ev AA, Aldoshin SM. Cationic dinitrosyl iron complexes with thiourea exhibit selective toxicity to brain tumor cells in vitro. Dalton Trans 2022; 51:8893-8905. [PMID: 35635550 DOI: 10.1039/d2dt01011a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The cytotoxic activity of a series of dinitrosyl iron complexes (DNICs) with thioureas against cells of different origin has been studied in this work. The cytotoxicity of the studied DNICs proved to be substantially different depending on the structure of the complexes and cell line. Complexes with thiourea and 1,3-dimethylthiourea were found to induce notable cell death in different cell lines of both cancerous and non-cancerous origin, while the N-ethylthiourea-bearing complex induced cell death in cells derived from brain tumors. The studied DNICs effectively release NO while decomposing in solutions, as follows from the electrochemical analysis. It was found that the cytotoxic effects of the studied DNICs did not correlate with their NO-donating ability, hence suggesting that their cytotoxic activity is, in a big part, defined by the long-lived nitrosyl iron-sulfur intermediates formed during the decomposition of the complexes. The structures of the products formed upon hydrolytic decomposition of all studied DNICs have been studied by electrospray ionization mass spectrometry. Stable high-molecular cluster ions containing NO groups namely [Fe4S3(NO)7]- (Roussin's "black salt" anion), [Fe4S3(NO)5]-, [Fe4S4(NO)4]-, [Fe4S3(NO)4]- and [Fe4S3(NO)6]- have been detected in the solution of the N-ethylthiourea-bearing complex. The mechanism of Roussin's "black salt" anion formation in a solution of DNIC with N'-ethylthiourea was studied using density functional theory. This moved us near understanding the reasons for the formation of biologically active intermediates upon the decomposition of the complex with N'-ethylthiourea, which are apparently responsible for the unique antiglioma activity of the complex.
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Affiliation(s)
- N A Sanina
- Institute of Problems of Chemical Physics, The Russian Academy of Sciences, 142432, Chernogolovka, Russia. .,Scientific and Educational Center "Medical Chemistry" of Moscow State Regional University, 141014, Mytishchi, Russia.,Faculty of Fundamental Physicochemical Engineering, Moscow State University, 119991, Moscow, Russia
| | - I V Sulimenkov
- Chernogolovka Branch of N.N. Semenov Federal Research Center of Chemical Physics, The Russian Academy of Sciences, 142432, Chernogolovka, Russia
| | - N S Emel'yanova
- Institute of Problems of Chemical Physics, The Russian Academy of Sciences, 142432, Chernogolovka, Russia.
| | - A S Konyukhova
- Faculty of Fundamental Physicochemical Engineering, Moscow State University, 119991, Moscow, Russia
| | - T S Stupina
- Institute of Problems of Chemical Physics, The Russian Academy of Sciences, 142432, Chernogolovka, Russia.
| | - A A Balakina
- Institute of Problems of Chemical Physics, The Russian Academy of Sciences, 142432, Chernogolovka, Russia.
| | - A A Terent'ev
- Institute of Problems of Chemical Physics, The Russian Academy of Sciences, 142432, Chernogolovka, Russia. .,Scientific and Educational Center "Medical Chemistry" of Moscow State Regional University, 141014, Mytishchi, Russia.,Faculty of Fundamental Physicochemical Engineering, Moscow State University, 119991, Moscow, Russia
| | - S M Aldoshin
- Institute of Problems of Chemical Physics, The Russian Academy of Sciences, 142432, Chernogolovka, Russia.
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Pokidova OV, Emel'yanova NS, Kormukhina AY, Novikova VO, Kulikov AV, Kotelnikov AI, Sanina NA. Albumin as a prospective carrier of the nitrosyl iron complex with thiourea and thiosulfate ligands under aerobic conditions. Dalton Trans 2022; 51:6473-6485. [PMID: 35394482 DOI: 10.1039/d2dt00291d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
High-molecular-weight dinitrosyl iron complexes (DNICs) are formed in living systems and are a stable depot of nitrogen monoxide (NO). In this work, using experimental and theoretical methods, we investigated the interaction of their synthetic analog, a promising cardiotropic complex of the composition [Fe(SC(NH2)2)2(NO)2]2[Fe2(S2O3)2(NO)4], with bovine serum albumin (BSA) in aqueous aerobic solutions. We suggested that, under these conditions, the decomposition product of the initial complex with oxygen, the [Fe(NO)(NO2)]+ fragment, can bind in the hydrophobic pocket of the protein. As a result of this interaction, high-molecular-weight Fe(Cys34)(His39)(NO)(NO2) is formed. The binding constant of the complex with protein measured by the quenching of intrinsic fluorescence of BSA is 7.2 × 105 M-1. According to EPR and UV-spectroscopy data, the interaction of the complex with the protein leads to its significant stabilization. In addition to coordination binding, the studied complex can be adsorbed onto the protein surface due to weak intermolecular interactions, resulting in the prolonged generation of NO.
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Affiliation(s)
- Olesya V Pokidova
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 prosp. Acad. Semenova, 142432 Chernogolovka, Moscow Region, Russian Federation.
| | - Nina S Emel'yanova
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 prosp. Acad. Semenova, 142432 Chernogolovka, Moscow Region, Russian Federation. .,Faculty of Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, GSP-1, Leninskie Gory, 119991 Moscow, Russian Federation
| | - Alexandra Yu Kormukhina
- Faculty of Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, GSP-1, Leninskie Gory, 119991 Moscow, Russian Federation
| | - Veronika O Novikova
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 prosp. Acad. Semenova, 142432 Chernogolovka, Moscow Region, Russian Federation.
| | - Alexander V Kulikov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 prosp. Acad. Semenova, 142432 Chernogolovka, Moscow Region, Russian Federation. .,Faculty of Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, GSP-1, Leninskie Gory, 119991 Moscow, Russian Federation
| | - Alexander I Kotelnikov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 prosp. Acad. Semenova, 142432 Chernogolovka, Moscow Region, Russian Federation. .,Faculty of Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, GSP-1, Leninskie Gory, 119991 Moscow, Russian Federation
| | - Natalia A Sanina
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 prosp. Acad. Semenova, 142432 Chernogolovka, Moscow Region, Russian Federation. .,Faculty of Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, GSP-1, Leninskie Gory, 119991 Moscow, Russian Federation.,Scientific and Educational Center "Medical Chemistry" of Moscow State Regional University, 24 Vera Voloshina St., 141014 Mytishchi, Moscow Region, Russian Federation
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Neshev NI, Sokolova EM, Kozub GI, Kondrat’eva TA, Sanina NA. Kinetic regularities of NO donation by binuclear dinitrosyl iron complexes with thiolate ligands based on thiophenol derivatives in the presence of red blood cells. Russ Chem Bull 2020. [DOI: 10.1007/s11172-020-2989-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Pokidova ОV, Emel’yanova NS, Psikha BL, Sanina NA, Kulikov AV, Kotel’nikov AI, Aldoshin SM. Transformation of mononuclear dinitrosyl iron complex (DNIC) with thiourea in glutathione aqueous solution. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.05.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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