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Fang L, Zhang D, Chen H, Li K. Efficient removal of moxifloxacin through PMS activation by CuFeS 2/MXene. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:45353-45369. [PMID: 38963631 DOI: 10.1007/s11356-024-34144-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 06/24/2024] [Indexed: 07/05/2024]
Abstract
Due to the frequent detection and potential toxicity of moxifloxacin (MOX), its removal technology had attracted attention in recent years. In this research, CuFeS2/MXene was prepared and used to activate peroxymonosulfate (PMS) to remove MOX. The degradation efficiencies, kinetics, influences, and reaction mechanism of MOX by CuFeS2/MXene/PMS were investigated. The synergistic effect of CuFeS2 and MXene significantly enhanced PMS activation, producing SO4•-, HO•, and 1O2 as the main active species. By adding 0.12 g/L CuFeS2/MXene and 0.12 mM PMS, MOX removal efficiency reached 99.1% within 40 min, with a rate constant of 0.1073 min-1. The composite ratios of CuFeS2/MXene impacted PMS activation more significantly than catalyst dosages and PMS concentrations. Acidic conditions were favorable for the degradation of MOX, while HCO3-, HPO42-, Mn2+, and HA had the inhibitory effects. Twelve major products were detected by HPLC-MS, and DFT was used to illustrate possible degradation pathways of MOX, including the removal of nitrogen-containing heterocycle and transformations of quinolone moieties. Toxicity analysis showed that the developmental toxicity, mutagenicity, and acute toxicity of degradation products tended to decrease. CuFeS2/MXene could exhibit excellent reusability, maintaining an average MOX degradation efficiency of 90.8% in the 7-cycle experiments.
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Affiliation(s)
- Lei Fang
- College of Civil Engineering and Architecture, and Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province, Zhejiang University, Hangzhou, 310058, China.
- Future Water Laboratory, Innovation Center of Yangtze River Delta, Zhejiang University, Jiaxing, 314000, China.
| | - Dongyang Zhang
- College of Civil Engineering and Architecture, and Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province, Zhejiang University, Hangzhou, 310058, China
| | - Huishan Chen
- College of Civil Engineering and Architecture, and Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province, Zhejiang University, Hangzhou, 310058, China
| | - Kunfu Li
- College of Civil Engineering and Architecture, and Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province, Zhejiang University, Hangzhou, 310058, China
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Moxifloxacin Liposomes: Effect of Liposome Preparation Method on Physicochemical Properties and Antimicrobial Activity against Staphylococcus epidermidis. Pharmaceutics 2022; 14:pharmaceutics14020370. [PMID: 35214102 PMCID: PMC8875207 DOI: 10.3390/pharmaceutics14020370] [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: 01/09/2022] [Revised: 01/27/2022] [Accepted: 02/01/2022] [Indexed: 12/16/2022] Open
Abstract
The aim of this study was the development of optimal sustained-release moxifloxacin (MOX)-loaded liposomes as intraocular therapeutics of endophthalmitis. Two methods were compared for the preparation of MOX liposomes; the dehydration–rehydration (DRV) method and the active loading method (AL). Numerous lipid-membrane compositions were studied to determine the potential effect on MOX loading and retention in liposomes. MOX and phospholipid contents were measured by HPLC and a colorimetric assay for phospholipids, respectively. Vesicle size distribution and surface charge were measured by DLS, and morphology was evaluated by cryo-TEM. The AL method conferred liposomes with higher MOX encapsulation compared to the DRV method for all the lipid compositions used. Cryo-TEM showed that both liposome types had round vesicular structure and size around 100–150 nm, while a granular texture was evident in the entrapped aqueous compartments of most AL liposomes, but substantially less in DRV liposomes; X-ray diffraction analysis demonstrated slight crystallinity in AL liposomes, especially the ones with highest MOX encapsulation. AL liposomes retained MOX for significantly longer time periods compared to DRVs. Lipid composition did not affect MOX release from DRV liposomes but significantly altered drug loading/release in AL liposomes. Interestingly, AL liposomes demonstrated substantially higher antimicrobial potential towards S. epidermidis growth and biofilm susceptibility compared to corresponding DRV liposomes, indicating the importance of MOX retention in liposomes on their activity. In conclusion, the liposome preparation method/type determines the rate of MOX release from liposomes and modulates their antimicrobial potential, a finding that deserves further in vitro and in vivo exploitation.
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Santos CS, Leite A, Vinhas S, Ferreira S, Moniz T, Vasconcelos MW, Rangel M. A combined physiological and biophysical approach to understand the ligand-dependent efficiency of 3-hydroxy-4-pyridinone Fe-chelates. PLANT DIRECT 2020; 4:e00256. [PMID: 32821874 PMCID: PMC7429444 DOI: 10.1002/pld3.256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 07/20/2020] [Accepted: 07/22/2020] [Indexed: 05/11/2023]
Abstract
Ligands of the 3-hydroxy-4-pyridinone (3,4-HPO) class were considered eligible to formulate new Fe fertilizers for Iron Deficiency Chlorosis (IDC). Soybean (Glycine max L.) plants grown in hydroponic conditions and supplemented with Fe-chelate [Fe(mpp)3] were significantly greener, had increased biomass, and were able to translocate more iron from the roots to the shoots than those supplemented with an equal amount of the commercially available chelate [FeEDDHA]. To understand the influence of the structure of 3,4-HPO ligand on the role of the Fe-chelate to improve Fe-uptake, we investigated and report here the effect of Fe-chelates ([Fe(mpp)3], [Fe(dmpp)3], and [Fe(etpp)3]) in addressing IDC. Chlorosis development was assessed by measurement of morphological parameters, quantification of chlorophyll and Fe, and other micronutrient contents, as well as measurement of enzymatic activity (FCR) and gene expression (FRO2, IRT1, and Ferritin). All [Fe(3,4-HPO)3] chelates were able to provide Fe to plants and prevent IDC but with a different efficiency depending on the ligand. We hypothesize that this may be related with the distinct physicochemical characteristics of ligands and complexes, namely, the diverse hydrophilic-lipophilic balance of the three chelates. To test the hypothesis, we performed an EPR biophysical study using liposomes prepared from a soybean (Glycine3 max L.) lipid extract and spin probes. The results showed that the most effective chelate [Fe(mpp)3] shows a preferential location close to the surface while the others prefer the hydrophobic region inside the bilayer. SIGNIFICANCE STATEMENT The 3-hydroxy-4-pyridinone Fe-chelates, [Fe(mpp)3], [Fe(dmpp)3], and [Fe(etpp)3], were all able to provide Fe to plants and prevent IDC. Efficacy is dependent on the structure of the ligand. From an EPR biophysical study using spin probes and liposomes, prepared from a soybean lipid extract, we hypothesize that this may be related with the distinct preferential location close to the surface or on the hydrophobic region of the lipid bilayer. [Fe(mpp)3] provide higher amounts of Fe in the leaves.
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Affiliation(s)
- Carla S. Santos
- CBQF – Centro de Biotecnologia e Química Fina – Laboratório AssociadoUniversidade Católica PortuguesaEscola Superior de BiotecnologiaPortoPortugal
| | - Andreia Leite
- REQUIMTELAQVDepartamento de Química e BioquímicaFaculdade de CiênciasUniversidade do PortoPortoPortugal
| | - Sílvia Vinhas
- REQUIMTELAQVDepartamento de Química e BioquímicaFaculdade de CiênciasUniversidade do PortoPortoPortugal
| | - Sofia Ferreira
- REQUIMTELAQVInstituto de Ciências Biomédicas de Abel SalazarUniversidade do PortoPortoPortugal
| | - Tânia Moniz
- REQUIMTELAQVDepartamento de Química e BioquímicaFaculdade de CiênciasUniversidade do PortoPortoPortugal
| | - Marta W. Vasconcelos
- CBQF – Centro de Biotecnologia e Química Fina – Laboratório AssociadoUniversidade Católica PortuguesaEscola Superior de BiotecnologiaPortoPortugal
| | - Maria Rangel
- REQUIMTELAQVInstituto de Ciências Biomédicas de Abel SalazarUniversidade do PortoPortoPortugal
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Utilization of TBDMS chitosan for synthesis of photoactive chitosan derivatives and application in photografting on ophthalmic lens material. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104600] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Yang PC, DeMarco KR, Aghasafari P, Jeng MT, Dawson JRD, Bekker S, Noskov SY, Yarov-Yarovoy V, Vorobyov I, Clancy CE. A Computational Pipeline to Predict Cardiotoxicity: From the Atom to the Rhythm. Circ Res 2020; 126:947-964. [PMID: 32091972 DOI: 10.1161/circresaha.119.316404] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
RATIONALE Drug-induced proarrhythmia is so tightly associated with prolongation of the QT interval that QT prolongation is an accepted surrogate marker for arrhythmia. But QT interval is too sensitive a marker and not selective, resulting in many useful drugs eliminated in drug discovery. OBJECTIVE To predict the impact of a drug from the drug chemistry on the cardiac rhythm. METHODS AND RESULTS In a new linkage, we connected atomistic scale information to protein, cell, and tissue scales by predicting drug-binding affinities and rates from simulation of ion channel and drug structure interactions and then used these values to model drug effects on the hERG channel. Model components were integrated into predictive models at the cell and tissue scales to expose fundamental arrhythmia vulnerability mechanisms and complex interactions underlying emergent behaviors. Human clinical data were used for model framework validation and showed excellent agreement, demonstrating feasibility of a new approach for cardiotoxicity prediction. CONCLUSIONS We present a multiscale model framework to predict electrotoxicity in the heart from the atom to the rhythm. Novel mechanistic insights emerged at all scales of the system, from the specific nature of proarrhythmic drug interaction with the hERG channel, to the fundamental cellular and tissue-level arrhythmia mechanisms. Applications of machine learning indicate necessary and sufficient parameters that predict arrhythmia vulnerability. We expect that the model framework may be expanded to make an impact in drug discovery, drug safety screening for a variety of compounds and targets, and in a variety of regulatory processes.
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Affiliation(s)
- Pei-Chi Yang
- From the Department of Physiology and Membrane Biology (P.-C.Y., K.R.D., P.A., M.-T.J., J.R.D.D., V.Y.-Y., I.V., C.E.C.), University of California Davis
| | - Kevin R DeMarco
- From the Department of Physiology and Membrane Biology (P.-C.Y., K.R.D., P.A., M.-T.J., J.R.D.D., V.Y.-Y., I.V., C.E.C.), University of California Davis
| | - Parya Aghasafari
- From the Department of Physiology and Membrane Biology (P.-C.Y., K.R.D., P.A., M.-T.J., J.R.D.D., V.Y.-Y., I.V., C.E.C.), University of California Davis
| | - Mao-Tsuen Jeng
- From the Department of Physiology and Membrane Biology (P.-C.Y., K.R.D., P.A., M.-T.J., J.R.D.D., V.Y.-Y., I.V., C.E.C.), University of California Davis
| | - John R D Dawson
- From the Department of Physiology and Membrane Biology (P.-C.Y., K.R.D., P.A., M.-T.J., J.R.D.D., V.Y.-Y., I.V., C.E.C.), University of California Davis.,Biophysics Graduate Group (J.R.D.D.), University of California Davis
| | - Slava Bekker
- Department of Science and Engineering, American River College, Sacramento, CA (S.B.)
| | - Sergei Y Noskov
- Faculty of Science, Centre for Molecular Simulations and Department of Biological Sciences, University of Calgary, Alberta, Canada (S.Y.N.)
| | - Vladimir Yarov-Yarovoy
- From the Department of Physiology and Membrane Biology (P.-C.Y., K.R.D., P.A., M.-T.J., J.R.D.D., V.Y.-Y., I.V., C.E.C.), University of California Davis
| | - Igor Vorobyov
- From the Department of Physiology and Membrane Biology (P.-C.Y., K.R.D., P.A., M.-T.J., J.R.D.D., V.Y.-Y., I.V., C.E.C.), University of California Davis.,Department of Pharmacology (I.V., C.E.C.), University of California Davis
| | - Colleen E Clancy
- From the Department of Physiology and Membrane Biology (P.-C.Y., K.R.D., P.A., M.-T.J., J.R.D.D., V.Y.-Y., I.V., C.E.C.), University of California Davis.,Department of Pharmacology (I.V., C.E.C.), University of California Davis
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Pimenta AFR, Vieira AP, Colaço R, Saramago B, Gil MH, Coimbra P, Alves P, Bozukova D, Correia TR, Correia IJ, Guiomar AJ, Serro AP. Controlled release of moxifloxacin from intraocular lenses modified by Ar plasma-assisted grafting with AMPS or SBMA: An in vitro study. Colloids Surf B Biointerfaces 2017; 156:95-103. [PMID: 28531880 DOI: 10.1016/j.colsurfb.2017.04.060] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 04/03/2017] [Accepted: 04/29/2017] [Indexed: 11/30/2022]
Abstract
Intraocular lenses (IOLs) present an alternative for extended, local drug delivery in the prevention of post-operative acute endophthalmitis. In the present work, we modified the surface of a hydrophilic acrylic material, used for manufacturing of IOLs, through plasma-assisted grafting copolymerization of 2-acrylamido-2-methylpropane sulfonic acid (AMPS) or [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide (SBMA), with the aim of achieving a controlled and effective drug release. The material was loaded with moxifloxacin (MFX), a commonly used antibiotic for endophthalmitis prevention. The characterization of the modified material showed that relevant properties, like swelling capacity, wettability, refractive index and transmittance, were not affected by the surface modification. Concerning the drug release profiles, the most promising result was obtained when AMPS grafting was done in the presence of MFX. This modification led to a higher amount of drug being released for a longer period of time, which is a requirement for the prevention of endophthalmitis. The material was found to be non-cytotoxic for rabbit corneal endothelial cells. In a second step, prototype IOLs were modified with AMPS and loaded with MFX as previously and, after sterilization and storage (30days), they were tested under dynamic conditions, in a microfluidic cell with volume and renovation rate similar to the eye aqueous humour. MFX solutions collected in this assay were tested against Staphylococcus aureus and Staphylococcus epidermidis and the released antibiotic proved to be effective against both bacteria until the 12th day of release.
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Affiliation(s)
- A F R Pimenta
- CQE, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal; IDMEC, Departamento de Engenharia Mecânica, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - A P Vieira
- CIEPQPF, Departamento de Engenharia Química, Universidade de Coimbra, Coimbra, Portugal
| | - R Colaço
- IDMEC, Departamento de Engenharia Mecânica, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - B Saramago
- CQE, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - M H Gil
- CIEPQPF, Departamento de Engenharia Química, Universidade de Coimbra, Coimbra, Portugal
| | - P Coimbra
- CIEPQPF, Departamento de Engenharia Química, Universidade de Coimbra, Coimbra, Portugal
| | - P Alves
- CIEPQPF, Departamento de Engenharia Química, Universidade de Coimbra, Coimbra, Portugal
| | | | - T R Correia
- CICS, Departamento de Ciências Médicas, Universidade da Beira Interior, Covilhã, Portugal
| | - I J Correia
- CICS, Departamento de Ciências Médicas, Universidade da Beira Interior, Covilhã, Portugal
| | - A J Guiomar
- CIEPQPF, Departamento de Engenharia Química, Universidade de Coimbra, Coimbra, Portugal; Departamento de Ciências da Vida, Universidade de Coimbra, Coimbra, Portugal
| | - A P Serro
- CQE, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal; CIIEM, Instituto Superior de Ciências da Saúde Egas Moniz, Caparica, Portugal.
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Kundu P, Ghosh S, Karmakar R, Maiti G, Chattopadhyay N. Impact of Structural Modification on the Photophysical Response of Benzoquinoline Fluorophores. J Fluoresc 2016; 26:845-54. [DOI: 10.1007/s10895-016-1772-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Accepted: 01/14/2016] [Indexed: 10/22/2022]
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Nazar MF, Mukhtar F, Ashfaq M, Rahman HMAU, Zafar MN, Sumrra SH. Physicochemical investigation of antibacterial Moxifloxacin interacting with quaternary ammonium disinfectants. FLUID PHASE EQUILIBRIA 2015; 406:47-54. [DOI: 10.1016/j.fluid.2015.07.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Van Doorslaer X, Dewulf J, Van Langenhove H, Demeestere K. Fluoroquinolone antibiotics: an emerging class of environmental micropollutants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 500-501:250-69. [PMID: 25226071 DOI: 10.1016/j.scitotenv.2014.08.075] [Citation(s) in RCA: 366] [Impact Index Per Article: 36.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 08/21/2014] [Accepted: 08/21/2014] [Indexed: 05/21/2023]
Abstract
The aim of this review paper is to provide a comprehensive overview of different chemical and environmental aspects concerning fluoroquinolone antibiotics as emerging contaminants. A literature survey has been performed based on 204 papers from 1998 to mid-2013, resulting in a dataset consisting out of 4100 data points related to physical-chemical properties, environmental occurrence, removal efficiencies, and ecotoxicological data. In a first part, an overview is given on relevant physical-chemical parameters to better understand the behavior of fluoroquinolones during wastewater treatment and in the environment. Secondly, the route of these antibiotics after their application in both human and veterinary surroundings is discussed. Thirdly, the occurrence of fluoroquinolone residues is discussed for different environmental matrices. The final part of this review provides a tentative risk assessment of fluoroquinolone compounds and their transformation products in surface waters by means of hazard quotients. Overall, this review shows that fluoroquinolone antibiotics have a wide spread use and that their behavior during wastewater treatment is complex with an incomplete removal. As a result, it is observed that these biorecalcitrant compounds are present in different environmental matrices at potentially hazardous concentrations for the aquatic environment. The latter calls for actions on both the consumption as well as the wastewater treatment aspect to diminish the discharge of these biological active compounds.
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Affiliation(s)
- Xander Van Doorslaer
- Research Group EnVOC, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Jo Dewulf
- Research Group EnVOC, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Herman Van Langenhove
- Research Group EnVOC, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Kristof Demeestere
- Research Group EnVOC, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
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Ciprofloxacin Metalloantibiotic: An Effective Antibiotic with an Influx Route Strongly Dependent on Lipid Interaction? J Membr Biol 2014; 248:125-36. [DOI: 10.1007/s00232-014-9749-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 10/29/2014] [Indexed: 12/01/2022]
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Djurdjevic P, Jakovljevic I, Joksovic L, Ivanovic N, Jelikic-Stankov M. The effect of some fluoroquinolone family members on biospeciation of copper(II), nickel(II) and zinc(II) ions in human plasma. Molecules 2014; 19:12194-223. [PMID: 25123186 PMCID: PMC6271013 DOI: 10.3390/molecules190812194] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Revised: 07/25/2014] [Accepted: 07/30/2014] [Indexed: 11/16/2022] Open
Abstract
The speciation of Cu2+, Ni2+ and Zn2+ ions in the presence of the fluoroquinolones (FQs) moxifloxacin, ofloxacin, levofloxacin and ciprofloxacin, in human blood plasma was studied under physiological conditions by computer simulation. The speciation was calculated using an updated model of human blood plasma including over 6,000 species with the aid of the program Hyss2009. The identity and stability of metal-FQ complexes were determined by potentiometric (310 K, 0.15 mol/L NaCl), spectrophotometric, spectrofluorimetric, ESI-MS and 1H-NMR measurements. In the case of Cu2+ ion the concentration of main low molecular weight (LMW) plasma complex (Cu(Cis)His) is very slightly influenced by all examined FQs. FQs show much higher influence on main plasma Ni2+ and Zn2+ complexes: (Ni(His)2 and Zn(Cys)Cit, respectively. Levofloxacin exhibits the highest influence on the fraction of the main nickel complex, Ni(His)2, even at a concentration level of 3×10⁻⁵ mol/L. The same effect is seen on the main zinc complex, Zn(Cys)Cit. Calculated plasma mobilizing indexes indicate that ciprofloxacin possesses the highest mobilizing power from plasma proteins, toward copper ion, while levofloxacin is the most influential on nickel and zinc ions. The results obtained indicate that the drugs studied are safe in relation to mobilization of essential metal ions under physiological conditions. The observed effects were explained in terms of competitive equilibrium reactions between the FQs and the main LMW complexes of the metal ions.
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Affiliation(s)
- Predrag Djurdjevic
- Faculty of Science, Chemistry Department, University of Kragujevac, P.O.BOX 60, 34000 Kragujevac, Serbia.
| | - Ivan Jakovljevic
- Faculty of Science, Chemistry Department, University of Kragujevac, P.O.BOX 60, 34000 Kragujevac, Serbia.
| | - Ljubinka Joksovic
- Faculty of Science, Chemistry Department, University of Kragujevac, P.O.BOX 60, 34000 Kragujevac, Serbia.
| | - Nevena Ivanovic
- Faculty of Science, Chemistry Department, University of Kragujevac, P.O.BOX 60, 34000 Kragujevac, Serbia.
| | - Milena Jelikic-Stankov
- Faculty of Pharmacy, Analytical Chemistry Department, University of Belgrade, 11221 Belgrade, Serbia.
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Quantification of moxifloxacin in urine using surface-enhanced Raman spectroscopy (SERS) and multivariate curve resolution on a nanostructured gold surface. Anal Bioanal Chem 2013; 405:7671-7. [DOI: 10.1007/s00216-013-7200-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 06/25/2013] [Accepted: 07/01/2013] [Indexed: 10/26/2022]
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Lopes SC, Ribeiro C, Gameiro P. A New Approach to Counteract Bacteria Resistance: A Comparative Study Between Moxifloxacin and a New Moxifloxacin Derivative in Different Model Systems of Bacterial Membrane. Chem Biol Drug Des 2012; 81:265-74. [DOI: 10.1111/cbdd.12071] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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dos Santos DJVA, Saenz-Méndez P, Eriksson LA, Guedes RC. Properties and behaviour of tetracyclic allopsoralen derivatives inside a DPPC lipid bilayer model. Phys Chem Chem Phys 2011; 13:10174-82. [DOI: 10.1039/c0cp02245d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Neves P, Sousa I, Winterhalter M, Gameiro P. Fluorescence quenching as a tool to investigate quinolone antibiotic interactions with bacterial protein OmpF. J Membr Biol 2009; 227:133-40. [PMID: 19148694 DOI: 10.1007/s00232-008-9152-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2008] [Accepted: 12/19/2008] [Indexed: 10/21/2022]
Abstract
The outer membrane porin OmpF is an important protein for the uptake of antibiotics through the outer membrane of gram-negative bacteria; however, the possible binding sites involved in this uptake are still not recognized. Determination, at the molecular level, of the possible sites of antibiotic interaction is very important, not only to understand their mechanism of action but also to unravel bacterial resistance. Due to the intrinsic OmpF fluorescence, attributed mainly to its tryptophans (Trp(214), Trp(61)), quenching experiments were used to assess the site(s) of interaction of some quinolone antibiotics. OmpF was reconstituted in different organized structures, and the fluorescence quenching results, in the presence of two quenching agents, acrylamide and iodide, certified that acrylamide quenches Trp(61) and iodide Trp(214). Similar data, obtained in presence of the quinolones, revealed distinct behaviors for these antibiotics, with nalidixic acid interacting near Trp(214) and moxifloxacin near Trp(61). These studies, based on straightforward and quick procedures, show the existence of conformational changes in the protein in order to adapt to the different organized structures and to interact with the quinolones. The extent of reorganization of the protein in the presence of the different quinolones allowed an estimate on the sites of protein/quinolone interaction.
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Characterization of the interactions between fluoroquinolone antibiotics and lipids: a multitechnique approach. Biophys J 2008; 94:3035-46. [PMID: 18178657 PMCID: PMC2275711 DOI: 10.1529/biophysj.107.114843] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Probing drug/lipid interactions at the molecular level represents an important challenge in pharmaceutical research and membrane biophysics. Previous studies showed differences in accumulation and intracellular activity between two fluoroquinolones, ciprofloxacin and moxifloxacin, that may actually result from their differential susceptibility to efflux by the ciprofloxacin transporter. In view of the critical role of lipids for the drug cellular uptake and differences observed for the two closely related fluoroquinolones, we investigated the interactions of these two antibiotics with lipids, using an array of complementary techniques. Moxifloxacin induced, to a greater extent than ciprofloxacin, an erosion of the DPPC domains in the DOPC fluid phase (atomic force microscopy) and a shift of the surface pressure-area isotherms of DOPC/DPPC/fluoroquinolone monolayer toward lower area per molecule (Langmuir studies). These effects are related to a lower propensity of moxifloxacin to be released from lipid to aqueous phase (determined by phase transfer studies and conformational analysis) and a marked decrease of all-trans conformation of acyl-lipid chains of DPPC (determined by ATR-FTIR) without increase of lipid disorder and change in the tilt between the normal and the germanium surface (also determined by ATR-FTIR). All together, differences of ciprofloxacin as compared to moxifloxacin in their interactions with lipids could explain differences in their cellular accumulation and susceptibility to efflux transporters.
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