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Development of Dipeptide N–acetyl–L–cysteine Loaded Nanostructured Carriers Based on Inorganic Layered Hydroxides. Pharmaceutics 2023; 15:pharmaceutics15030955. [PMID: 36986816 PMCID: PMC10054814 DOI: 10.3390/pharmaceutics15030955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 02/21/2023] [Accepted: 03/08/2023] [Indexed: 03/17/2023] Open
Abstract
N–acetyl–L–cysteine (NAC), a derivative of the L–cysteine amino acid, presents antioxidant and mucolytic properties of pharmaceutical interest. This work reports the preparation of organic-inorganic nanophases aiming for the development of drug delivery systems based on NAC intercalation into layered double hydroxides (LDH) of zinc–aluminum (Zn2Al–NAC) and magnesium–aluminum (Mg2Al–NAC) compositions. A detailed characterization of the synthesized hybrid materials was performed, including X-ray diffraction (XRD) and pair distribution function (PDF) analysis, infrared and Raman spectroscopies, solid-state 13carbon and 27aluminum nuclear magnetic resonance (NMR), simultaneous thermogravimetric and differential scanning calorimetry coupled to mass spectrometry (TG/DSC–MS), scanning electron microscopy (SEM), and elemental chemical analysis to assess both chemical composition and structure of the samples. The experimental conditions allowed to isolate Zn2Al–NAC nanomaterial with good crystallinity and a loading capacity of 27.3 (m/m)%. On the other hand, NAC intercalation was not successful into Mg2Al–LDH, being oxidized instead. In vitro drug delivery kinetic studies were performed using cylindrical tablets of Zn2Al–NAC in a simulated physiological solution (extracellular matrix) to investigate the release profile. After 96 h, the tablet was analyzed by micro-Raman spectroscopy. NAC was replaced by anions such as hydrogen phosphate by a slow diffusion-controlled ion exchange process. Zn2Al–NAC fulfil basic requirements to be employed as a drug delivery system with a defined microscopic structure, appreciable loading capacity, and allowing a controlled release of NAC.
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Mármol I, Montanel-Perez S, Royo JC, Gimeno MC, Villacampa MD, Rodríguez-Yoldi MJ, Cerrada E. Gold(I) and Silver(I) Complexes with 2-Anilinopyridine-Based Heterocycles as Multitarget Drugs against Colon Cancer. Inorg Chem 2020; 59:17732-17745. [DOI: 10.1021/acs.inorgchem.0c02922] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Inés Mármol
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
- Departamento de Farmacología y Fisiología, Unidad de Fisiología. and CIBERobn, IIS Aragón, IA2, Universidad de Zaragoza, 50013 Zaragoza, Spain
| | - Sara Montanel-Perez
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - José Carlos Royo
- Departamento de Farmacología y Fisiología, Unidad de Fisiología. and CIBERobn, IIS Aragón, IA2, Universidad de Zaragoza, 50013 Zaragoza, Spain
| | - M. Concepción Gimeno
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - M. Dolores Villacampa
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - M. Jesús Rodríguez-Yoldi
- Departamento de Farmacología y Fisiología, Unidad de Fisiología. and CIBERobn, IIS Aragón, IA2, Universidad de Zaragoza, 50013 Zaragoza, Spain
| | - Elena Cerrada
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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Aquaroni NAS, Nakahata DH, Lazarini SC, Resende FA, Cândido ALP, da Silva Barud H, Claro AM, de Carvalho JE, Ribeiro CM, Pavan FR, Lustri BC, Ribeiro TRM, Moreira CG, Cândido TZ, Lima CSP, Ruiz ALTG, Corbi PP, Lustri WR. Antibacterial activities and antiproliferative assays over a tumor cells panel of a silver complex with 4-aminobenzoic acid: Studies in vitro of sustained release using bacterial cellulose membranes as support. J Inorg Biochem 2020; 212:111247. [PMID: 32920435 DOI: 10.1016/j.jinorgbio.2020.111247] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/13/2020] [Accepted: 08/30/2020] [Indexed: 11/28/2022]
Abstract
The aims of this work were to evaluate the antibacterial and antiproliferative potential in vitro of the metal complex with 4-aminobenzoic acid (Ag-pABA) and a drug delivery system based on bacterial cellulose (BC-Ag-pABA). The Ag-pABA complex was characterized by elemental analysis, high resolution mass spectrometry and single-crystal X-ray diffraction techniques, which indicated a 1:2 metal/pABA composition plus a nitrate ion coordinated to silver by the oxygen atom, with the coordination formula [Ag (C7H7NO2)2(NO3)]. The coordination of pABA to the silver ion occurred by the nitrogen atom. The in vitro antibacterial activity of the complex evaluated by minimum inhibitory concentration assays demonstrated the effective growth inhibitory activity against Gram-positive, Gram-negative biofilm producers and acid-alcohol resistant Bacillus. The antiproliferative activities against a panel of eight tumor cells demonstrated the activity of the complex with a significant selectivity index (SI). The DNA interaction capacity and the Ames Test indicated the absence of mutagenicity. The BC-Ag-pABA composite showed an effective capacity of sustained release of Ag-pABA. The observed results validate further studies on its mechanisms of action and the conditions that mediate the in vivo biological effects using animal models to confirm its safety and effectiveness for treatment of skin and soft tissues infected by bacterial pathogens, urinary tract infections and cancer.
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Affiliation(s)
| | - Douglas H Nakahata
- University of Araraquara - UNIARA, 14801-320 Araraquara, São Paulo, Brazil
| | - Silmara C Lazarini
- University of Araraquara - UNIARA, 14801-320 Araraquara, São Paulo, Brazil
| | - Flávia A Resende
- University of Araraquara - UNIARA, 14801-320 Araraquara, São Paulo, Brazil
| | - Amanda L P Cândido
- University of Araraquara - UNIARA, 14801-320 Araraquara, São Paulo, Brazil
| | | | - Amanda Maria Claro
- University of Araraquara - UNIARA, 14801-320 Araraquara, São Paulo, Brazil
| | - João Ernesto de Carvalho
- Faculty of Pharmaceutical Sciences, University of Campinas - UNICAMP, 13081-970 Campinas, SP, Brazil
| | - Camila M Ribeiro
- São Paulo State University - UNESP, School of Pharmaceutical Sciences, 14801-903 Araraquara, Brazil
| | - Fernando R Pavan
- São Paulo State University - UNESP, School of Pharmaceutical Sciences, 14801-903 Araraquara, Brazil
| | - Bruna C Lustri
- São Paulo State University - UNESP, School of Pharmaceutical Sciences, 14801-903 Araraquara, Brazil
| | | | - Cristiano G Moreira
- São Paulo State University - UNESP, School of Pharmaceutical Sciences, 14801-903 Araraquara, Brazil
| | - Tuany Zambroti Cândido
- Faculty of Medical Sciences, University of Campinas - UNICAMP, 13081-970 Campinas, SP, Brazil
| | | | - Ana Lúcia T G Ruiz
- Faculty of Pharmaceutical Sciences, University of Campinas - UNICAMP, 13081-970 Campinas, SP, Brazil
| | - Pedro P Corbi
- Institute of Chemistry, University of Campinas - UNICAMP, 13083-970 Campinas, São Paulo, Brazil
| | - Wilton R Lustri
- University of Araraquara - UNIARA, 14801-320 Araraquara, São Paulo, Brazil.
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Fazary AE, Awwad NS, Ibrahium HA, Shati AA, Alfaifi MY, Ju YH. Protonation Equilibria of N-Acetylcysteine. ACS OMEGA 2020; 5:19598-19605. [PMID: 32803054 PMCID: PMC7424727 DOI: 10.1021/acsomega.0c02080] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 07/20/2020] [Indexed: 05/14/2023]
Abstract
The acid base protonation equilibria of N-acetylcysteine (Nac) and its equilibrium constants in water solutions were determined by the Hyperquad 2008 software assessment from the pH potentiometry data, which provides a diversity of statistics presentations. The effect of a number of organic solvents on the acid base protonation processes was also examined. The solution equilibria of N-acetylcysteine (Nac) were studied at T = 298.15 K in water (w 1) + organic liquid mixtures [100 w 2 = 0, 20, 40, 60, and 80%] with an ionic strength of I = 0.16 mol·dm-3 NaNO3. Also, the organic solvent's influence was studied based on the Kamlet-Taft linear solvation energy relationship. The experimental results were compared with theoretical ones obtained via the Gaussian 09 calculation computer program. The protonation equilibria of Nac were found to be important in the progress of separation systems in aqueous and non-aqueous ionic solutions. Nac showed a likely good metal dibasic chelating bioligand as the DFT calculations proved two binding sites. Spectrophotometry evaluation was also done for N-acetylcysteine bioligands at various pH values in water solutions then its absorbance ratio was measured.
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Affiliation(s)
- Ahmed E. Fazary
- Applied
Research Department, Research and Development Sector, Egyptian Organization for Biological Products and Vaccines (VACSERA
Holding Company), 51
Wezaret El-Zeraa St., Agouza, Giza 22311, Egypt
- . Phone: +2-106-358-2851
| | - Nasser S. Awwad
- Department
of Chemistry, Faculty of Science, King Khalid
University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Hala A. Ibrahium
- Biology
Department, Faculty of Science, King Khalid
University, Abha 9004, Kingdom of Saudi Arabia
- Department
of Semi Pilot Plant, Nuclear Materials Authority, P.O. Box 530, El Maadi, Cairo 11381, Egypt
| | - Ali A. Shati
- Department
of Biology, Faculty of Science, King Khalid
University, Abha 9004, Kingdom of Saudi Arabia
| | - Mohammad Y. Alfaifi
- Department
of Biology, Faculty of Science, King Khalid
University, Abha 9004, Kingdom of Saudi Arabia
| | - Yi-Hsu Ju
- Graduate
Institute of Applied Science and Technology, Department of Chemical
Engineering, Taiwan Building Technology Center, National Taiwan University of Science and Technology, 43 Section 4, Keelung Road, Taipei 10607, Taiwan
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Cardozo C, Mendoza A, Farías G, Formiga ALB, Peña D, Fuentes F, Arce A, Otero Y. Synthesis of rhenacyclopentadienes and η2:η2-diyne complexes from a labile dirhenium carbonyl and π-conjugated 1,7-octadiynes: Structural and photophysical characterization. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2018.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Liang X, Luan S, Yin Z, He M, He C, Yin L, Zou Y, Yuan Z, Li L, Song X, Lv C, Zhang W. Recent advances in the medical use of silver complex. Eur J Med Chem 2018; 157:62-80. [DOI: 10.1016/j.ejmech.2018.07.057] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 07/16/2018] [Accepted: 07/25/2018] [Indexed: 11/28/2022]
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Lustri WR, Lazarini SC, Lustri BC, Corbi PP, Silva MAC, Resende Nogueira FA, Aquino R, Amaral AC, Treu Filho O, Massabni AC, da Silva Barud H. Spectroscopic characterization and biological studies in vitro of a new silver complex with furosemide: Prospective of application as an antimicrobial agent. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.12.056] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Santoso SP, Angkawijaya AE, Ju YH, Soetaredjo FE, Ismadji S, Ayucitra A. Synthesis, characterization, thermodynamics and biological studies of binary and ternary complexes including some divalent metal ions, 2, 3-dihydroxybenzoic acid and N -acetylcysteine. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2016.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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9
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Complexes of 2,6-dihydroxybenzoic acid with divalent metal ions: Synthesis, crystal structure, spectral studies, and biological activity enhancement. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.06.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Sisombath NS, Jalilehvand F. Similarities between N-Acetylcysteine and Glutathione in Binding to Lead(II) Ions. Chem Res Toxicol 2015; 28:2313-24. [PMID: 26624959 DOI: 10.1021/acs.chemrestox.5b00323] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
N-Acetylcysteine is a natural thiol-containing antioxidant, a precursor for cysteine and glutathione, and a potential detoxifying agent for heavy metal ions. However, previous accounts of the efficiency of N-acetylcysteine (H2NAC) in excretion of lead are few and contradicting. Here, we report results on the nature of lead(II) complexes formed with N-acetylcysteine in aqueous solution, which were obtained by combining information from several spectroscopic methods, including (207)Pb, (13)C, and (1)H NMR, Pb LIII-edge X-ray absorption, ultraviolet-visible (UV-vis) spectroscopy, and electro-spray ionization mass spectrometry (ESI-MS). Two series of solutions were used containing CPb(II) = 10 and 100 mM, respectively, varying the H2NAC/Pb(II) mole ratios from 2.1 to 10.0 at pH 9.1-9.4. The coordination environments obtained resemble those previously found for the Pb(II) glutathione system: at a ligand-to-lead mole ratio of 2.1, dimeric or oligomeric Pb(II) N-acetylcysteine complexes are formed, while a trithiolate [Pb(NAC)3](4-) complex dominates in solutions with H2NAC/Pb(II) mole ratios >3.0.
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Affiliation(s)
- Natalie S Sisombath
- Department of Chemistry, University of Calgary , 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Farideh Jalilehvand
- Department of Chemistry, University of Calgary , 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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Wasukan N, Srisung S, Kuno M, Kulthong K, Maniratanachote R. Interaction evaluation of silver and dithizone complexes using DFT calculations and NMR analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 149:830-838. [PMID: 26001102 DOI: 10.1016/j.saa.2015.04.064] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Revised: 03/27/2015] [Accepted: 04/20/2015] [Indexed: 06/04/2023]
Abstract
Silver has distinct antibacterial properties and has been used as a component of commercial products with many applications. An increasing number of commercial products cause risks of silver effects for human and environment such as the symptoms of Argyria and the release of silver to the environment. Therefore, the detection of silver in the aquatic environment is important. The colorimetric chemosensor is designed by the basic of ligand interactions with metal ion, leading to the change of signals for the naked-eyes which is very useful method to this application. Dithizone ligand is considered as one of the effective chelating reagents for metal ions due to its high selectivity and sensitivity of a photochromic reaction for silver as well as the linear backbone of dithizone affords the rotation of various isomeric forms. The present study is focused on the conformation and interaction of dithizone with silver using density functional theory (DFT). The interaction parameters were determined in term of binding energy of complexes and the geometry optimization, frequency of the structures and calculation of binding energies using density functional approaches B3LYP and the 6-31G(d,p) basis set. Moreover, the interaction of silver-dithizone complexes was supported by UV-Vis spectroscopy, FT-IR spectrum that were simulated by using B3LYP/6-31G(d,p) and (1)H NMR spectra calculation using B3LYP/6-311+G(2d,p) method compared with the experimental data. The results showed the ion exchange interaction between hydrogen of dithizone and silver atom with minimized binding energies of silver-dithizone interaction. Therefore, the results can be the useful information for determination of complex interaction using the analysis of computer simulations.
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Affiliation(s)
- Nootcharin Wasukan
- National Nanotechnology Center, National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Khlong Luang, Pathum Thani 12120, Thailand; Department of Chemistry, Faculty of Science, Srinakharinwirot University, Sukhumwit 23, Wattana District, Bangkok 10110, Thailand
| | - Sujittra Srisung
- Department of Chemistry, Faculty of Science, Srinakharinwirot University, Sukhumwit 23, Wattana District, Bangkok 10110, Thailand.
| | - Mayuso Kuno
- Department of Chemistry, Faculty of Science, Srinakharinwirot University, Sukhumwit 23, Wattana District, Bangkok 10110, Thailand
| | - Kornphimol Kulthong
- National Nanotechnology Center, National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Khlong Luang, Pathum Thani 12120, Thailand
| | - Rawiwan Maniratanachote
- National Nanotechnology Center, National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Khlong Luang, Pathum Thani 12120, Thailand
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Zanvettor NT, Abbehausen C, Lustri WR, Cuin A, Masciocchi N, Corbi PP. Silver sulfadoxinate: Synthesis, structural and spectroscopic characterizations, and preliminary antibacterial assays in vitro. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.11.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Mosconi N, Giulidori C, Velluti F, Hure E, Postigo A, Borthagaray G, Back DF, Torre MH, Rizzotto M. Antibacterial, Antifungal, Phytotoxic, and Genotoxic Properties of Two Complexes of AgIwith Sulfachloropyridazine (SCP): X-ray Diffraction of [Ag(SCP)]n. ChemMedChem 2014; 9:1211-20. [DOI: 10.1002/cmdc.201400071] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Indexed: 12/14/2022]
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Kumar R, Obrai S, Kaur A, Hundal MS, Meehnian H, Jana AK. Synthesis, crystal structure investigation, DFT analyses and antimicrobial studies of silver(i) complexes with N,N,N′,N′′-tetrakis(2-hydroxyethyl/propyl) ethylenediamine and tris(2-hydroxyethyl)amine. NEW J CHEM 2014. [DOI: 10.1039/c3nj00729d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Banti CN, Hadjikakou SK. Anti-proliferative and anti-tumor activity of silver(I) compounds. Metallomics 2013; 5:569-96. [PMID: 23612876 DOI: 10.1039/c3mt00046j] [Citation(s) in RCA: 161] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Silver is proving to have a number of medicinal applications; as an antiseptic, an antibacterial, and an anti-inflammatory, while any biological role for it is currently unknown. Silver compounds and their therapeutic potentials are under consideration from many research groups, while a number of early reviews recording the advances of silver(I) chemistry are also available. However there is no recent report on the screening for the antitumor potential of silver(I) compounds. This review focuses upon results obtained on the anti-proliferative activity of silver compounds in the past years. This survey shows that silver(I) complexes containing various type of ligands such as carboxylic acids, amino acids, nitrogen, phosphorus or sulfur donor ligands, exhibit selectivity against a variety of cancer cells. The role of the coordination number, which is related to either the stability or hydrophilicity-lipophilicity of a complex, is not clearly elucidated within this review.
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Affiliation(s)
- Christina N Banti
- Section of Inorganic and Analytical Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
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Leung BO, Jalilehvand F, Mah V, Parvez M, Wu Q. Silver(I) complex formation with cysteine, penicillamine, and glutathione. Inorg Chem 2013; 52:4593-602. [PMID: 23556419 PMCID: PMC3684387 DOI: 10.1021/ic400192c] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The complex formation between silver(I) and cysteine (H2Cys), penicillamine (H2Pen), and glutathione (H3Glu) in alkaline aqueous solution was examined using extended X-ray absorption fine structure (EXAFS) and (109)Ag NMR spectroscopic techniques. The complexes formed in 0.1 mol dm(-3) Ag(I) solutions with cysteine and penicillamine were investigated for ligand/Ag(I) (L/Ag) mole ratios increasing from 2.0 to 10.0. For the series of cysteine solutions (pH 10-11) a mean Ag-S bond distance of 2.45 ± 0.02 Å consistently emerged, while for penicillamine (pH 9) the average Ag-S bond distance gradually increased from 2.40 to 2.44 ± 0.02 Å. EXAFS and (109)Ag NMR spectra of a concentrated Ag(I)-cysteine solution (C(Ag(I)) = 0.8 mol dm(-3), L/Ag = 2.2) showed a mean Ag-S bond distance of 2.47 ± 0.02 Å and δ((109)Ag) 1103 ppm, consistent with prevailing, partially oligomeric AgS3 coordinated species, while for penicillamine (C(Ag(I)) = 0.5 mol dm(-3), L/Ag = 2.0) the mean Ag-S bond distance of 2.40 ± 0.02 Å and δ((109)Ag) 922 ppm indicate that mononuclear AgS2 coordinated complexes dominate. For Ag(I)-glutathione solutions (C(Ag(I)) = 0.01 mol dm(-3), pH ∼11), mononuclear AgS2 coordinated species with a mean Ag-S bond distance of 2.36 ± 0.02 Å dominate for L/Ag mole ratios from 2.0 to 10.0. The crystal structure of the silver(I)-cysteine compound (NH4)Ag2(HCys)(Cys)·H2O (1) precipitating at pH ∼10 was solved and showed a layer structure with both AgS3 and AgS3N coordination to the cysteinate ligands. A redetermination of the crystal structure of Ag(HPen)·H2O (2) confirmed the proposed digonal AgS2 coordination environment to bridging thiolate sulfur atoms in polymeric intertwining chains forming a double helix. A survey of Ag-S bond distances for crystalline Ag(I) complexes with S-donor ligands in different AgS2, AgS2(O/N), and AgS3 coordination environments was used, together with a survey of (109)Ag NMR chemical shifts, to assist assignments of the Ag(I) coordination in solution.
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Carvalho MA, de Paiva RE, Bergamini FR, Gomes AF, Gozzo FC, Lustri WR, Formiga AL, Shishido SM, Ferreira CV, Corbi PP. A silver complex with tryptophan: Synthesis, structural characterization, DFT studies and antibacterial and antitumor assays in vitro. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.07.044] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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18
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Silver(I) and gold(I) complexes with penicillamine: Synthesis, spectroscopic characterization and biological studies. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.01.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Helttunen K, Moridi N, Shahgaldian P, Nissinen M. Resorcinarene bis-crown silver complexes and their application as antibacterial Langmuir-Blodgett films. Org Biomol Chem 2012; 10:2019-25. [PMID: 22290247 DOI: 10.1039/c2ob06920b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silver complexes of a cation binding supramolecular host, resorcinarene bis-crown (CNBC5) with propyl, nonyl, decyl and undecyl alkyl chains were investigated by NMR titration, picrate extraction and single crystal X-ray diffraction. Binding studies showed that both 1 : 1 and 1 : 2 (host-Ag(+)) complexes are present in solution with only a slight effect of the lower rim alkyl chain length on the binding constants (log K 4.0-4.2 for 1 : 2 complexes). Solid state complexes of the resorcinarene bis-crowns bearing either C(3) or C(11) chains were obtained. Single crystal X-ray analyses showed that both derivatives bind silver ions by metal-arene and Ag···O coordination from the crown ether bridges and from the solvent, and pack in layered or bilayered fashion. Furthermore, the amphiphilic nature of C11BC5 was demonstrated using the Langmuir balance technique. Langmuir-Blodgett films of the amphiphilic C11BC5-Ag complex were transferred onto a substrate and shown to possess antibacterial activity against E. coli.
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Affiliation(s)
- Kaisa Helttunen
- Nanoscience Center, Department of Chemistry, University of Jyväskylä, P.O. Box 35, Jyväskylä FI-40014, Finland
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Bergamini FRG, Ferreira MA, de Paiva REF, Gomes AF, Gozzo FC, Formiga ALB, Corbi FCA, Mazali IO, Alves DA, Lancellotti M, Corbi PP. A binuclear silver complex with l-buthionine sulfoximine: synthesis, spectroscopic characterization, DFT studies and antibacterial assays. RSC Adv 2012. [DOI: 10.1039/c2ra21433d] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Abbehausen C, Castro JF, Spera MB, Heinrich TA, Costa-Neto CM, Lustri WR, Formiga AL, Corbi PP. Synthesis, spectroscopic characterization, DFT studies and biological assays of a novel gold(I) complex with 2-mercaptothiazoline. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.06.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Fiori ATM, Lustri WR, Magalhães A, Corbi PP. Chemical, spectroscopic characterization and antibacterial activities in vitro of a novel gold(I)–ibuprofen complex. INORG CHEM COMMUN 2011. [DOI: 10.1016/j.inoche.2011.02.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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