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Abugazleh MK, Ali HM, Chester JA, Al-Fa'ouri AM, Bouldin JL. Aquatic toxicity of hydroquinone and catechol following metal oxide treatment to Ceriodaphnia dubia and Pimephales promelas. ECOTOXICOLOGY (LONDON, ENGLAND) 2023:10.1007/s10646-023-02672-5. [PMID: 37306764 DOI: 10.1007/s10646-023-02672-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Accepted: 05/25/2023] [Indexed: 06/13/2023]
Abstract
Metal oxides comprise a large group of chemicals used in water treatment to adsorb organic pollutants. The ability of titanium dioxide (TiO2) and iron (III) oxide (Fe2O3) to reduce the chronic toxicity of (phenolic) C6H6(OH)2 isomers, namely hydroquinone (HQ) and catechol (CAT) to Ceriodaphnia dubia and Pimephales promelas (less than 24 h-old) were investigated. The toxic endpoints following metal oxide treatment were compared to endpoints of untreated CAT and HQ. In chronic toxicity testing, HQ resulted in greater toxicity than CAT for both test organisms; the median lethal concentrations (LC50) for CAT were 3.66 to 12.36 mg.L-1 for C. dubia and P. promelas, respectively, while LC50 for HQ were 0.07 to 0.05 mg.L-1, respectively. Although both treated solutions presented lower toxic endpoints than those in the untreated solutions, Fe2O3 had a better potential to reduce the toxic effects of CAT and HQ than TiO2.
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Affiliation(s)
- Mohd Kotaiba Abugazleh
- Department of Chemistry and Physics, College of Science and Mathematics, Arkansas State University, Jonesboro, AR, 72467, USA.
| | - Hashim M Ali
- Department of Chemistry and Physics, College of Science and Mathematics, Arkansas State University, Jonesboro, AR, 72467, USA
| | - Jae A Chester
- Department of Biological Sciences, College of Science and Mathematics, Arkansas State University, Jonesboro, AR, 72467, USA
| | | | - Jennifer L Bouldin
- Department of Biological Sciences, College of Science and Mathematics, Arkansas State University, Jonesboro, AR, 72467, USA
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Mikucka W, Zielinska M, Bulkowska K, Witonska I. Subcritical water extraction of bioactive phenolic compounds from distillery stillage. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 318:115548. [PMID: 35753130 DOI: 10.1016/j.jenvman.2022.115548] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/30/2022] [Accepted: 06/15/2022] [Indexed: 06/15/2023]
Abstract
Distilleries generate huge amounts of by-products that have a negative impact on the environment, so the management of wastes generated by this sector should be improved. Because distillery by-products are a source of bioactive compounds, the recovery of these compounds not only reduces issues with environmental protection but also provides the basis for a waste-to-profit solution. Following the latest trends in the search for so-called green extraction techniques for recovering valuable products, this study investigated the effect of subcritical water extraction (SWE) conditions (temperature (25-260 °C), time (5-90 min), and solid-to-solvent ratio (1:5-1:50, w:v)) on the efficiency of recovery of bioactive compounds, i.e., polyphenols from distillery stillage, and on the antioxidant activity of the extracts. The highest extraction yield was obtained with 30-min SWE with a solid-to-solvent ratio of 1:15 at either 140 °C (for total polyphenol content and phenolic acid content) or 200 °C (for total flavonoid content), as indicated by the Response Surface Methodology analysis. Phenolic acids in the extracts were present mainly in free forms (up to 88% of the total content). The antioxidant activity, which was measured using several assays, correlated positively with the content of phenolic acids, which confirmed their significant contribution to the bioactive properties of the extracts. The antioxidant effects of the extracts were mostly due to hydroxycinnamic acids (especially ferulic and p-coumaric acids). Principal component analysis showed that the temperature and time of SWE were the factors that can explain the greatest amount of variation in the extraction yield, composition, and bioactive properties of the polyphenols. These results will influence the design of further processes, such as purification and concentration, which are necessary before using the extracted compounds as substrates that are applicable in various industries. Based on the analysis of the elemental composition, the biomass remaining after SWE was evaluated to consider the possibilities of its further utilization.
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Affiliation(s)
- Wioleta Mikucka
- University of Warmia and Mazury in Olsztyn, Faculty of Geoengineering, Department of Environmental Biotechnology, Sloneczna St. 45G, 10-709, Olsztyn, Poland.
| | - Magdalena Zielinska
- University of Warmia and Mazury in Olsztyn, Faculty of Geoengineering, Department of Environmental Biotechnology, Sloneczna St. 45G, 10-709, Olsztyn, Poland
| | - Katarzyna Bulkowska
- University of Warmia and Mazury in Olsztyn, Faculty of Geoengineering, Department of Environmental Biotechnology, Sloneczna St. 45G, 10-709, Olsztyn, Poland
| | - Izabela Witonska
- Lodz University of Technology, Faculty of Chemistry, Institute of General and Ecological Chemistry, Zeromskiego St. 116, 90-924, Lodz, Poland
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Smith D, Jheeta S, Fuentes HV, Palacios-Pérez M. Feeding Our Microbiota: Stimulation of the Immune/Semiochemical System and the Potential Amelioration of Non-Communicable Diseases. Life (Basel) 2022; 12:1197. [PMID: 36013376 PMCID: PMC9410320 DOI: 10.3390/life12081197] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/30/2022] [Accepted: 08/03/2022] [Indexed: 12/12/2022] Open
Abstract
Non-communicable diseases are those conditions to which causative infectious agents cannot readily be assigned. It is increasingly likely that at least some of these conditions are due to the breakdown of the previously mutualistic intestinal microbiota under the influence of a polluted, biocide-rich, environment. Following the mid-20th century African studies of Denis Burkitt, the environmental cause of conditions such as obesity has been ascribed to the absence of sufficient fibre in the modern diet, however in itself that is insufficient to explain the parallel rise of problems with both the immune system and of mental health. Conversely, Burkitt himself noted that the Maasai, a cattle herding people, remained healthy even with their relatively low intake of dietary fibre. Interestingly, however, Burkitt also emphasised that levels of non-communicable disease within a population rose as faecal weight decreased significantly, to about one third of the levels found in healthy populations. Accordingly, a more cogent explanation for all the available facts is that the fully functioning, adequately diverse microbiome, communicating through what has been termed the microbiota-gut-brain axis, helps to control the passage of food through the digestive tract to provide itself with the nutrition it needs. The method of communication is via the production of semiochemicals, interkingdom signalling molecules, potentially including dopamine. In turn, the microbiome aids the immune system of both adult and, most importantly, the neonate. In this article we consider the role of probiotics and prebiotics, including fermented foods and dietary fibre, in the stimulation of the immune system and of semiochemical production in the gut lumen. Finally, we reprise our suggestion of an ingestible sensor, calibrated to the detection of such semiochemicals, to assess both the effectiveness of individual microbiomes and methods of amelioration of the associated non-communicable diseases.
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Affiliation(s)
- David Smith
- Network of Researchers on the Chemical Evolution of Life (NoRCEL), Leeds LS7 3RB, UK
| | - Sohan Jheeta
- Network of Researchers on the Chemical Evolution of Life (NoRCEL), Leeds LS7 3RB, UK
| | - Hannya V. Fuentes
- Network of Researchers on the Chemical Evolution of Life (NoRCEL), Leeds LS7 3RB, UK
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Mexico City 04510, Mexico
| | - Miryam Palacios-Pérez
- Network of Researchers on the Chemical Evolution of Life (NoRCEL), Leeds LS7 3RB, UK
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Mexico City 04510, Mexico
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Akyeva AY, Kansuzyan AV, Vukich KS, Kuhn L, Saverina EA, Minyaev ME, Pechennikov VM, Egorov MP, Alabugin IV, Vorobyev SV, Syroeshkin MA. Remote Stereoelectronic Effects in Pyrrolidone- and Caprolactam-Substituted Phenols: Discrepancies in Antioxidant Properties Evaluated by Electrochemical Oxidation and H-Atom Transfer Reactivity. J Org Chem 2022; 87:5371-5384. [PMID: 35363496 DOI: 10.1021/acs.joc.2c00207] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New antioxidants are commonly evaluated via two main approaches, i.e., the ability to donate an electron and the ability to intercept free radicals. We compared these approaches by evaluating the properties of 11 compounds containing both antioxidant moieties (mono- and polyphenols) and auxiliary pharmacophores (pyrrolidone and caprolactam). Several common antioxidants, such as butylated hydroxytoluene (BHT), 2,3,5-trimethylphenol (TMP), quercetin, and dihydroquercetin, were added for comparison. The antioxidant properties of these compounds were determined by their rates of reaction with 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and their oxidation potentials from cyclic voltammetry. Although these methods test different chemical properties, their results correlate reasonably well. However, several exceptions exist where the two methods give opposite predictions! One of them is the different behavior of mono- and polyphenols: polyphenols can react with DPPH more than an order of magnitude faster than monophenols of a similar oxidation potential. The second exception stems from the size of a "bystander" lactam ring at the benzylic position. Although the phenols with a seven-membered lactam ring are harder to oxidize, the sterically nonhindered compounds react with DPPH about 2× faster than the analogous five-membered lactams. The limitations of computational methods, especially those based on a single parameter, are also evaluated and discussed.
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Affiliation(s)
- Anna Ya Akyeva
- N.D. Zelinsky Institute of Organic Chemistry, 119991 Moscow Russia
| | | | - Katarina S Vukich
- N.D. Zelinsky Institute of Organic Chemistry, 119991 Moscow Russia.,I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia
| | - Leah Kuhn
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | | | | | | | - Mikhail P Egorov
- N.D. Zelinsky Institute of Organic Chemistry, 119991 Moscow Russia
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Stepan V Vorobyev
- Gubkin Russian State University of Oil and Gas, 65 Leninsky Prospect, 119991 Moscow, Russia
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Li X, Cheng X, Zhang H. Ab initio dynamics simulation of laser-induced photodissociation of phenol. Phys Chem Chem Phys 2021; 23:12718-12730. [PMID: 34037002 DOI: 10.1039/d1cp00290b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We theoretically investigated the photodissociation dynamics of phenol molecules steered by a sequence of temporally shaped femtosecond laser pulses with high intensity and ultrashort duration, via the real-time Time-Dependent Density Functional Theory (rt-TDDFT) combined with a Molecular Dynamics (MD) simulation. The principal findings of this research are that the phenol photodissociation can take place in 50 fs; the bonds broke sequentially; the degree of phenol molecular dissociation has a strong linear correlation with the intensity. For an incident laser being 800 nm-40 fs (wavelength-pulse duration), the threshold intensity is 7 × 1014 W cm-2 and the products are hydrogen from OH1 (phenolic hydroxyl group) and C6H5O-fragments. More fragments will be found at stronger intensity, shorter wavelengths, and longer pulse duration. More accurately, we estimated the critical values of bond cleavage of an isolated phenol molecule are 1.779 Å for O-H1 and 2.184 Å for C-Hs via Electron localization function (ELF) analysis. The photodissociation of the phenol molecule was triggered via the excitation of electrons and the dissociation process of phenol here is in good agreement with the characteristics of field-assisted dissociation (FAD) theory. Orthogonal tests with an L9 (34) matrix and threshold intensity decrease tests were conducted to confirm the mechanism. Our research gives an insight into the photodissociation experiment of phenol and provides a simple yet effective way to understand the photochemical experiments of more complex organic pollutants with toxicity.
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Affiliation(s)
- Xiaojuan Li
- College of Physical, Sichuan University, Chengdu 610065, China.
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Kamel S, A. Khattab T. Recent Advances in Cellulose-Based Biosensors for Medical Diagnosis. BIOSENSORS 2020; 10:E67. [PMID: 32560377 PMCID: PMC7345568 DOI: 10.3390/bios10060067] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 06/10/2020] [Accepted: 06/15/2020] [Indexed: 12/11/2022]
Abstract
Cellulose has attracted much interest, particularly in medical applications such as advanced biosensing devices. Cellulose could provide biosensors with enhanced biocompatibility, biodegradability and non-toxicity, which could be useful for biosensors. Thus, they play a significant role in environmental monitoring, medical diagnostic tools, forensic science, and foodstuff processing safety applications. This review summarizes the recent developments in cellulose-based biosensors targeting the molecular design principles toward medical detection purposes. The recognition/detection mechanisms of cellulose-based biosensors demonstrate two major classes of measurable signal generation, including optical and electrochemical cellulosic biosensors. As a result of their simplicity, high sensitivity, and low cost, cellulose-based optical biosensors are particularly of great interest for including label-free and label-driven (fluorescent and colorimetric) biosensors. There have been numerous types of cellulose substrates employed in biosensors, including several cellulose derivatives, nano-cellulose, bacterial cellulose, paper, gauzes, and hydrogels. These kinds of cellulose-based biosensors were discussed according to their preparation procedures and detection principle. Cellulose and its derivatives with their distinctive chemical structure have demonstrated to be versatile materials, affording a high-quality platform for accomplishing the immobilization process of biologically active molecules into biosensors. Cellulose-based biosensors exhibit a variety of desirable characteristics, such as sensitivity, accuracy, convenience, quick response, and low-cost. For instance, cellulose paper-based biosensors are characterized as being low-cost and easy to operate, while nano-cellulose biosensors are characterized as having a good dispersion, high absorbance capacity, and large surface area. Cellulose and its derivatives have been promising materials in biosensors which could be employed to monitor various bio-molecules, such as urea, glucose, cell, amino acid, protein, lactate, hydroquinone, gene, and cholesterol. The future interest will focus on the design and construction of multifunctional, miniaturized, low-cost, environmentally friendly, and integrated biosensors. Thus, the production of cellulose-based biosensors is very important.
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Affiliation(s)
- Samir Kamel
- Cellulose and Paper Department, National Research Centre, Cairo 12622, Egypt;
| | - Tawfik A. Khattab
- Dyeing, Printing and Auxiliaries Department, National Research Centre, Cairo 12622, Egypt
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Structure-antioxidant activity relationship of methoxy, phenolic hydroxyl, and carboxylic acid groups of phenolic acids. Sci Rep 2020; 10:2611. [PMID: 32054964 PMCID: PMC7018807 DOI: 10.1038/s41598-020-59451-z] [Citation(s) in RCA: 211] [Impact Index Per Article: 52.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 01/27/2020] [Indexed: 11/12/2022] Open
Abstract
The antioxidant activities of 18 typical phenolic acids were investigated using 2, 2′-diphenyl-1-picrylhydrazyl (DPPH) and ferric ion reducing antioxidant power (FRAP) assays. Five thermodynamic parameters involving hydrogen atom transfer (HAT), single-electron transfer followed by proton transfer (SET-PT), and sequential proton-loss electron transfer (SPLET) mechanisms were calculated using density functional theory with the B3LYP/UB3LYP functional and 6–311++G (d, p) basis set and compared in the phenolic acids. Based on the same substituents on the benzene ring, -CH2COOH and -CH = CHCOOH can enhance the antioxidant activities of phenolic acids, compared with -COOH. Methoxyl (-OCH3) and phenolic hydroxyl (-OH) groups can also promote the antioxidant activities of phenolic acids. These results relate to the O-H bond dissociation enthalpy of the phenolic hydroxyl group in phenolic acids and the values of proton affinity and electron transfer enthalpy (ETE) involved in the electron donation ability of functional groups. In addition, we speculated that HAT, SET-PT, and SPLET mechanisms may occur in the DPPH reaction system. Whereas SPLET was the main reaction mechanism in the FRAP system, because, except for 4-hydroxyphenyl acid, the ETE values of the phenolic acids in water were consistent with the experimental results.
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Michalík M, Poliak P, Lukeš V, Klein E. From phenols to quinones: Thermodynamics of radical scavenging activity of para-substituted phenols. PHYTOCHEMISTRY 2019; 166:112077. [PMID: 31374519 DOI: 10.1016/j.phytochem.2019.112077] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/17/2019] [Accepted: 07/17/2019] [Indexed: 06/10/2023]
Abstract
Radical scavenging activity and subsequent oxidation resulting in quinone products represent one of the important features of phenols occurring in plants and other biological systems. However, corresponding thermochemistry data can be still considered scarce. For phenol and 25 para-substituted phenols, we investigate the thermodynamics of the individual reaction steps, including three subsequent hydrogen atom transfers, as well as hydroxyl HO radical addition, leading to final ortho-quinone formation. The substituent and solvent effect of water on corresponding reactions enthalpies is elucidated. Solvent enhances substituent induced changes in the investigated reaction enthalpies. The reliability of employed computational methods for the thermodynamics of hydrogen atom donating ability of studied phenols and catechols is assessed, too. Obtained linear equations enable estimation of studied reaction enthalpies from Hammett constants of substituents.
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Affiliation(s)
- Martin Michalík
- Institute of Physical Chemistry and Chemical Physics, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Peter Poliak
- Institute of Physical Chemistry and Chemical Physics, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Vladimír Lukeš
- Institute of Physical Chemistry and Chemical Physics, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Erik Klein
- Institute of Physical Chemistry and Chemical Physics, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia.
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Varela MT, Costa-Silva TA, Lago JHG, Tempone AG, Fernandes JPS. Evaluation of the antitrypanosoma activity and SAR study of novel LINS03 derivatives. Bioorg Chem 2019; 89:102996. [PMID: 31132603 DOI: 10.1016/j.bioorg.2019.102996] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 03/25/2019] [Accepted: 05/17/2019] [Indexed: 12/18/2022]
Abstract
Chagas' disease is a parasitic infection caused by Trypanosoma cruzi that is still treated by old and toxic drugs. In the search for novel alternatives, natural sources are an important source for new drug prototypes against T. cruzi to further structural exploitation. A set of natural-based compounds (LINS03) was designed, showing promising antitrypanosoma activity and low cytotoxicity to host cells. In this paper, nine novel LINS03 derivatives were evaluated against T. cruzi trypomastigotes and amastigotes. The selectivity was assessed through cytotoxicity assays using NCTC mammalian cells and calculating the CC50/IC50 ratio. The results showed that compounds 2d and 4c are noteworthy, due their high activity against amastigotes (IC50 13.9 and 5.8 µM) and low cytotoxicity (CC50 107.7 µM and >200 µM, respectively). These compounds did not showed alteration on plasma membrane permeability in a Sytox green model. SAR analysis suggested an ideal balance between hydrosolubility and lipophilicity is necessary to improve the activity, and that insertion of a meta-substituent is detrimental to the activity of the amine derivatives but not to the neutral derivatives, suggesting different mechanisms of actions. The results presented herein are valuable for designing novel compounds with improved activity and selectivity to be applied in future studies.
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Affiliation(s)
- Marina T Varela
- Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo, Rua São Nicolau 210, 09913-030 Diadema, SP, Brazil
| | - Thais A Costa-Silva
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Av. dos Estados 5001, 09210-580 Santo André, SP, Brazil
| | - João Henrique G Lago
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Av. dos Estados 5001, 09210-580 Santo André, SP, Brazil
| | - Andre G Tempone
- Centre for Parasitology and Mycology, Instituto Adolfo Lutz, Av. Dr. Arnaldo 351, 01246-000 São Paulo, SP, Brazil.
| | - João Paulo S Fernandes
- Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo, Rua São Nicolau 210, 09913-030 Diadema, SP, Brazil.
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Dehydrodieugenol B derivatives as antiparasitic agents: Synthesis and biological activity against Trypanosoma cruzi. Eur J Med Chem 2019; 176:162-174. [PMID: 31103897 DOI: 10.1016/j.ejmech.2019.05.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 04/30/2019] [Accepted: 05/01/2019] [Indexed: 01/02/2023]
Abstract
Chagas disease is a neglected protozoan disease that affects more than eight million people in developing countries. Due to the limited number and toxicity profiles of therapies in current use, new drugs are urgently needed. In previous studies, we reported the isolation of two related antitrypanosomal neolignans from Nectandra leucantha (Lauraceae). In this work, a semi-synthetic library of twenty-three neolignan derivatives was prepared to explore synthetically accessible structure activity relationships (SAR) against Trypanosoma cruzi. Five compounds demonstrated activity against trypomastigotes (IC50 values from 8 to 64 μM) and eight showed activity against intracellular amastigotes (IC50 values from 7 to 16 μM). Eighteen derivatives demonstrated no mammalian cytotoxicity up to 200 μM. The phenolic acetate derivative of natural dehydrodieugenol B was effective against both parasite forms and eliminated 100% of amastigotes inside macrophages. This compound caused rapid and intense depolarization of the mitochondrial membrane potential, with decreased levels of intracellular reactive oxygen species being observed. Fluorescence assays demonstrated that this derivative affected neither the permeability nor the electric potential of the parasitic plasma membrane, an effect also corroborated by scanning electron microscopy studies. Structure-activity relationship studies (SARs) demonstrated that the presence of at least one allyl side chain on the biaryl ether core was important for antitrypanosomal activity, and that the free phenol is not essential. This set of neolignan derivatives represents a promising starting point for future Chagas disease drug discovery studies.
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Gallate-induced nanoparticle uptake by tumor cells: Structure-activity relationships. Colloids Surf B Biointerfaces 2019; 179:28-36. [PMID: 30939407 DOI: 10.1016/j.colsurfb.2019.03.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 03/15/2019] [Accepted: 03/21/2019] [Indexed: 11/23/2022]
Abstract
How nanoparticles interact with biological systems determines whether they can be used in theranostic applications. It has been demonstrated that tea catechins, may enhance interactions of magnetic nanoparticles (MNPs) with tumor cells and the subsequent cellular internalization of MNPs. As part of the chemical structure of the major tea catechins, gallates are found in a variety of plants and thus food components. We asked whether the structure of gallate might act as a pharmacophore in the enhancement of the effects of MNP-cell interactions. Uptake of dextran-coated MNPs by glioma cells and cell-associated MNPs (MNPcell) were respectively analyzed by confocal microscopy and a colorimetric iron assay. Co-incubation of MNPs and gallates, such as gallic acid and methyl gallate, induced a concentration-dependent increase in MNPcell, which was associated with co-localization of internalized MNPs and lysosomes. An analysis of the structure-activity relationship (SAR) revealed that the galloyl moiety exerted the most prominent enhancement effects on MNPcell which was further potentiated by the application of magnetic force; catechol coupled with a conjugated carboxylic acid side chain displayed comparable effects to gallate. Blockade or reduction in the number of hydroxyl groups rendered these compounds less effective, but without inducing cytotoxicity. The SAR results suggest that neighboring hydroxyl groups on the aromatic ring form an essential scaffold for the uptake effects; a similar SAR on antioxidant activities was also observed using a free radical-scavenging method. The results provide pivotal information for theranostic applications of gallates by facilitating nanoparticle-cell interactions and nanoparticle internalization by tumor cells.
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Numviyimana C, Chmiel T, Kot-Wasik A, Namieśnik J. Study of pH and temperature effect on lipophilicity of catechol-containing antioxidants by reversed phase liquid chromatography. Microchem J 2019. [DOI: 10.1016/j.microc.2018.10.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Herbache H, Ramdani A, Taleb Z, Ruiz-Rosas R, Taleb S, Morallón E, Pirault-Roy L, Ghaffour N. Catalytic degradation of O-cresol using H 2 O 2 onto Algerian Clay-Na. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:165-174. [PMID: 30735300 DOI: 10.1002/wer.1022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 09/05/2018] [Accepted: 09/30/2018] [Indexed: 06/09/2023]
Abstract
Clay material is used as a catalyst to degrade an organic pollutant. This study focused on the O-cresol oxidative degradation in aqueous solution by adding H2 O2 and Mont-Na. The catalytic tests showed a high catalytic activity of Mont-Na, which made it possible to achieve more than 84.6% conversion after 90 min of reaction time at 55°C in 23.2 mM H2 O2 . The pH value was found to be negatively correlated with the degradation rate of O-cresol. UV-Vis spectrophotometry revealed that the increase of degradation rate at low pH is related to the formation of 2-methylbenzoquinone as intermediate product. In addition, the content of iron in Mont-Na decreased after the catalytic test, bringing further evidence about the O-cresol catalytic oxidation. The mineralization of O-cresol is also confirmed by the different methods of characterization of Mont-Na after the catalytic oxidation test. The effect of the O-cresol oxidation catalyzed by natural clay is significant. PRACTITIONER POINTS: Algerian Montmorillonite-Na is used as a catalyst to degrade an organic pollutant: O-cresol. It shows a great potential for catalyst properties in the presence of the oxidizing reagent H2 O2 . It proved to be an effective means for the degradation of O-cresol contained in wastewaters.
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Affiliation(s)
- Hayat Herbache
- Laboratory of Materials & Catalysis, Faculty of Exact Sciences, Djillali Liabès University, Sidi Bel-Abbès, Algeria
| | - Amina Ramdani
- Laboratory of Materials & Catalysis, Faculty of Exact Sciences, Djillali Liabès University, Sidi Bel-Abbès, Algeria
- Department of Chemistry, Faculty of Sciences, University Dr. Moulay Tahar, Saida, Algeria
| | - Zoubida Taleb
- Laboratory of Materials & Catalysis, Faculty of Exact Sciences, Djillali Liabès University, Sidi Bel-Abbès, Algeria
| | - Ramiro Ruiz-Rosas
- Instituto Universitario de Materiales, Universidad de Alicante, Alicante, Spain
| | - Safia Taleb
- Laboratory of Materials & Catalysis, Faculty of Exact Sciences, Djillali Liabès University, Sidi Bel-Abbès, Algeria
| | - Emilia Morallón
- Instituto Universitario de Materiales, Universidad de Alicante, Alicante, Spain
| | - Laurence Pirault-Roy
- Institut de Chimie des Milieux et Matériaux de Poitiers, IC2MP UMR 7285, B27, TSA 51106, Poitiers Cedex, France
| | - Noreddine Ghaffour
- Water Desalination & Reuse Centre, King Abdullah University of Science and Technology (KAUST), Division of Biological & Environmental Science & Engineering (BESE), 23955-6900 Thuwal 23955-6900, Saudi Arabia
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Cho HK, Park CG, Shin HJ, Park K, Lim HB. In vitro toxicological activity of particulate matter generated by coal combustion. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 64:187-195. [PMID: 30448727 DOI: 10.1016/j.etap.2018.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 10/31/2018] [Accepted: 11/05/2018] [Indexed: 06/09/2023]
Abstract
Herein, the toxicity of particles generated from the complete combustion of 1 g coal at 500, 700, and 900 °C were compared, and combustion at 700 °C generated the most toxins. Chemical analyses revealed that all components except catechol, resorcinol, and aromatic amines were most abundant at 700 °C. Toxicity results confirmed that the relative mutagenicity, cytotoxicity, redox cycling, and production of reactive oxygen species was highest for particles generated at 700 °C. Particles generated during combustion at 700 °C exhibited higher toxicity toward biological systems due to a higher content of toxic compounds.
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Affiliation(s)
- Hyun-Ki Cho
- College of Agriculture, Life & Environment Sciences, Chungbuk National University, Cheongju 362-763, Republic of Korea
| | - Chang-Gyun Park
- College of Agriculture, Life & Environment Sciences, Chungbuk National University, Cheongju 362-763, Republic of Korea
| | - Han-Jae Shin
- KT&G Research Institute, Daejeon 305-805, Republic of Korea
| | - Kihong Park
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Heung-Bin Lim
- College of Agriculture, Life & Environment Sciences, Chungbuk National University, Cheongju 362-763, Republic of Korea.
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16
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Yingcharoen P, Kongtes C, Arayachukiat S, Suvarnapunya K, Vummaleti SVC, Wannakao S, Cavallo L, Poater A, D' Elia V. Assessing the pKa
-Dependent Activity of Hydroxyl Hydrogen Bond Donors in the Organocatalyzed Cycloaddition of Carbon Dioxide to Epoxides: Experimental and Theoretical Study. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801093] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Prapussorn Yingcharoen
- Department of Materials Science and Engineering, School of Molecular Science and Engineering; Vidyasirimedhi Institute of Science and Technology, (VISTEC); Wang Chan Thailand
| | - Chutima Kongtes
- Department of Materials Science and Engineering, School of Molecular Science and Engineering; Vidyasirimedhi Institute of Science and Technology, (VISTEC); Wang Chan Thailand
| | - Sunatda Arayachukiat
- Department of Materials Science and Engineering, School of Molecular Science and Engineering; Vidyasirimedhi Institute of Science and Technology, (VISTEC); Wang Chan Thailand
| | - Kittipong Suvarnapunya
- Department of Materials Science and Engineering, School of Molecular Science and Engineering; Vidyasirimedhi Institute of Science and Technology, (VISTEC); Wang Chan Thailand
- Department of Immunology, Faculty of Medicine, Siriraj Hospital; Mahidol University; Bangkok 10700 Thailand
| | - Sai V. C. Vummaleti
- King Abdullah University of Science & Technology; KAUST Catalysis Center (KCC); 23955-6900 Thuwal Saudi Arabia
| | - Sippakorn Wannakao
- Department of Materials Science and Engineering, School of Molecular Science and Engineering; Vidyasirimedhi Institute of Science and Technology, (VISTEC); Wang Chan Thailand
| | - Luigi Cavallo
- King Abdullah University of Science & Technology; KAUST Catalysis Center (KCC); 23955-6900 Thuwal Saudi Arabia
| | - Albert Poater
- Institut de Química Computacional i Catàlisi and Departament de Química; Universitat de Girona, c/Maria Aurèlia Capmany 69; 17003 Girona, Catalonia Spain
| | - Valerio D' Elia
- Department of Materials Science and Engineering, School of Molecular Science and Engineering; Vidyasirimedhi Institute of Science and Technology, (VISTEC); Wang Chan Thailand
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17
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Michalík M, Poliak P, Klein E, Lukeš V. On the toxicity of para-substituted phenols and their quinone metabolites: Quantum chemical study. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.08.038] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Xiao Z, Wang Y, Wang J, Li P, Ma F. Structure-antioxidant capacity relationship of dihydrochalcone compounds in Malus. Food Chem 2018; 275:354-360. [PMID: 30724207 DOI: 10.1016/j.foodchem.2018.09.135] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 09/20/2018] [Accepted: 09/22/2018] [Indexed: 01/04/2023]
Abstract
The antioxidant capacity (AC) of six dihydrochalcone compounds was evaluated using DPPH and ABTS assays. In water-based solution 3-hydroxyphlorizin exhibited the highest AC among all dihydrochalcones. In acetone and acidic solutions (pH = 2.5 or 2.0), presence of an o-dihydroxyl at the B-ring increased AC, whereas glycosylation at the A-ring decreased AC of dihydrochalcones. By comparing the AC of dihydrochalcones with similar structures, it was found that the o-dihydroxyl at the B-ring and 2'-hydroxyl group at the A-ring were critical for maintaining the AC of dihydrochalcones by promoting hydrogen atom transfer or single electron transfer mechanism. Sequential proton-loss electron transfer commonly occurred during free radical scavenging in water-based solution. Moreover, we report a unique phenomenon in which glycosylation at the 2'-position enhanced the dissociation ability of the 4'-hydroxyl group and increased the AC of dihydrochalcones containing o-dihydroxyl. We speculate that this increase in AC might occur through intramolecular electron transfer.
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Affiliation(s)
- Zhengcao Xiao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yule Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jinxiao Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Pengmin Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
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19
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Chen Z, Su H, Hu D, Jia F, Li Z, Cui Y, Ran C, Wang X, Xu J, Xiao T, Li X, Wang H. Effect of organic loading rate on the removal of DMF, MC and IPA by a pilot-scale AnMBR for treating chemical synthesis-based antibiotic solvent wastewater. CHEMOSPHERE 2018; 198:49-58. [PMID: 29421760 DOI: 10.1016/j.chemosphere.2018.01.091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/14/2018] [Accepted: 01/20/2018] [Indexed: 06/08/2023]
Abstract
This study focuses on the effects of organic loading rate (OLR) on the removal of N,N-Dimethylformamide(DMF), m-Cresol (MC) and isopropyl alcohol (IPA) by a pilot-scale anaerobic membrane bioreactor (AnMBR) for treating chemical synthesis-based antibiotic solvent wastewater at period of improved influent COD concentration with decreased HRT. The whole process was divided into five stages in terms of the variation of OLR ranging from 3.9 to 12.7 kg COD/(m3·d). During 249 days of operating time, the average DMF, MC, IPA removal efficiency were 96.9%,98.2% and 96.4%, respectively. Cake layer was accumulated on the membrane surface acted as a dynamic secondary biofilm which lead to the increase of physical removal rate. In addition, mathematical statistical models was built on the linear regression techniques for exploring the inner relationship between EPS and the performance of the AnMBR.
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Affiliation(s)
- Zhaobo Chen
- College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China; School of Environmental and Municipal Engineering, Jilin Jianzhu University, Xincheng Street 5088, ChangChun 130118, China.
| | - Haiyan Su
- College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China
| | - Dongxue Hu
- College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China.
| | - Fuquan Jia
- School of Environmental and Municipal Engineering, Jilin Jianzhu University, Xincheng Street 5088, ChangChun 130118, China
| | - Zhenghai Li
- College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China
| | - Yubo Cui
- College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China
| | - Chunqiu Ran
- College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China
| | - Xiaojing Wang
- School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, PR China
| | - Jiao Xu
- College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China
| | - Tingting Xiao
- College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China
| | - Xue Li
- College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China
| | - Haixu Wang
- College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China
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20
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González-Chang M, Boyer S, Lefort MC, Nboyine J, Wratten SD. Ecological and pest-management implications of sex differences in scarab landing patterns on grape vines. PeerJ 2017; 5:e3213. [PMID: 28462026 PMCID: PMC5410136 DOI: 10.7717/peerj.3213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 03/21/2017] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Melolonthinae beetles, comprising different white grub species, are a globally-distributed pest group. Their larvae feed on roots of several crop and forestry species, and adults can cause severe defoliation. In New Zealand, the endemic scarab pest Costelytra zealandica (White) causes severe defoliation on different horticultural crops, including grape vines (Vitis vinifera). Understanding flight and landing behaviours of this pest can help inform pest management decisions. METHODS Adult beetles were counted and then removed from 96 grape vine plants from 21:30 until 23:00 h, every day from October 26 until December 2, during 2014 and 2015. Also, adults were removed from the grape vine foliage at dusk 5, 10, 15, 20 and 25 min after flight started on 2015. Statistical analyses were performed using generalised linear models with a beta-binomial distribution to analyse proportions and with a negative binomial distribution for beetle abundance. RESULTS By analysing C. zealandica sex ratios during its entire flight season, it is clear that the proportion of males is higher at the beginning of the season, gradually declining towards its end. When adults were successively removed from the grape vines at 5-min intervals after flight activity begun, the mean proportion of males ranged from 6-28%. The male proportion suggests males were attracted to females that had already landed on grape vines, probably through pheromone release. DISCUSSION The seasonal and daily changes in adult C. zealandica sex ratio throughout its flight season are presented for the first time. Although seasonal changes in sex ratio have been reported for other melolonthines, changes during their daily flight activity have not been analysed so far. Sex-ratio changes can have important consequences for the management of this pest species, and possibly for other melolonthines, as it has been previously suggested that C. zealandica females land on plants that produce a silhouette against the sky. Therefore, long-term management might evaluate the effect of different plant heights and architecture on female melolonthine landing patterns, with consequences for male distribution, and subsequently overall damage within horticultural areas.
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Affiliation(s)
| | - Stéphane Boyer
- Environmental and Animal Sciences, Unitec Institute of Technology, Auckland, New Zealand
| | - Marie-Caroline Lefort
- Bio-Protection Research Centre, Lincoln University, Christchurch, Lincoln, New Zealand.,Environmental and Animal Sciences, Unitec Institute of Technology, Auckland, New Zealand
| | - Jerry Nboyine
- Bio-Protection Research Centre, Lincoln University, Christchurch, Lincoln, New Zealand
| | - Steve D Wratten
- Bio-Protection Research Centre, Lincoln University, Christchurch, Lincoln, New Zealand
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21
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Varela MT, Lima ML, Galuppo MK, Tempone AG, de Oliveira A, Lago JHG, Fernandes JPS. New alkenyl derivative from Piper malacophyllum and analogues: Antiparasitic activity against Trypanosoma cruzi and Leishmania infantum. Chem Biol Drug Des 2017; 90:1007-1011. [PMID: 28371557 DOI: 10.1111/cbdd.12986] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 02/17/2017] [Accepted: 03/22/2017] [Indexed: 12/16/2022]
Abstract
Alkylphenols isolated from Piper malacophyllum (Piperaceae), gibbilimbols A and B, showed interesting activity against the parasites Trypanosoma cruzi and Leishmania infantum. In continuation to our previous work, a new natural product from the essential oil of the leaves of P. malacophyllum was isolated, the 5-[(3E)-oct-3-en-1-il]-1,3-benzodioxole, and also a new set of five compounds was prepared. The antiparasitic activity of the natural product was evaluated in vitro against these parasites, indicating potential against the promastigote/trypomastigote/amastigote forms (IC50 32-83 μm) of the parasites and low toxicity (CC50 > 200 μm) to mammalian cells. The results obtained to the synthetic compounds indicated that the new derivatives maintained the promising antiparasitic activity, but the cytotoxicity was considerably lowered. The amine derivative LINS03011 displayed the most potent IC50 values (13.3 and 16.7 μm) against amastigotes of T. cruzi and L. infantum, respectively, indicating comparable activity to the phenolic prototype LINS03003, with threefold decreased (CC50 73.5 μm) cytotoxicity, leading the selectivity index (SI) towards the parasites up to 24.5. In counterpart, LINS03011 has not shown membrane disruptor activity in SYTOX Green model. In summary, this new set showed the hydroxyl is not essential for the antiparasitic activity, and its substitution could decrease the toxicity to mammalian cells.
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Affiliation(s)
- Marina T Varela
- Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
| | - Marta L Lima
- Centro de Parasitologia e Micologia, Instituto Adolfo Lutz, São Paulo, SP, Brazil.,Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Mariana K Galuppo
- Centro de Parasitologia e Micologia, Instituto Adolfo Lutz, São Paulo, SP, Brazil
| | - Andre G Tempone
- Centro de Parasitologia e Micologia, Instituto Adolfo Lutz, São Paulo, SP, Brazil
| | - Alberto de Oliveira
- Instituto de Química, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - João Henrique G Lago
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil
| | - João Paulo S Fernandes
- Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
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22
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Rahut S, Panda R, Basu JK. Solvothermal synthesis of a layered titanate nanosheets and its photocatalytic activity: Effect of Ag doping. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.03.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Manderville RA, Wetmore SD. Understanding the Mutagenicity of O-Linked and C-Linked Guanine DNA Adducts: A Combined Experimental and Computational Approach. Chem Res Toxicol 2016; 30:177-188. [DOI: 10.1021/acs.chemrestox.6b00323] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Richard A. Manderville
- Departments
of Chemistry and Toxicology, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Stacey D. Wetmore
- Department of Chemistry & Biochemistry, University of Lethbridge, Lethbridge, AB, Canada T1K 3M4
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24
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Chen D, Liu F, Zong L, Sun X, Zhang X, Zhu C, Tao X, Li A. Integrated adsorptive technique for efficient recovery of m-cresol and m-toluidine from actual acidic and salty wastewater. JOURNAL OF HAZARDOUS MATERIALS 2016; 312:192-199. [PMID: 27037473 DOI: 10.1016/j.jhazmat.2016.03.056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 03/10/2016] [Accepted: 03/21/2016] [Indexed: 06/05/2023]
Abstract
An integrated adsorptive technique combining an m-cresol adsorption unit, an acid retardation unit and an m-toluidine adsorption unit in sequence was designed to recover m-cresol and m-toluidine from highly acidic and salty m-cresol manufacturing wastewater. In the first column packed with hypercrosslinked polymeric resin (NDA-99), most m-cresol was captured through π-π and hydrogen-bonding interactions as well as the salting-out effect, while m-toluidine was not absorbed due to protonation. To separate acid from salt, an acid retardation unit was introduced successively to adsorb sulfuric acid by strong base anion exchange resin (201×7). After the acid retardation unit and mild neutralization reaction, the last column filled with NDA-99 was applied to trap neutral m-toluidine from the salty effluent. Moreover, the eluent of the acid retardation unit was utilized as the regenerant to recover m-toluidine, and the recycled high-acidity and low-salinity solution of m-toluidine was directly used to produce m-cresol as the raw material. Therefore, the proposed method not only efficiently recycled m-cresol and m-toluidine, but also reduced the consumption of alkali dramatically (saving 0.1628t/t wastewater). These findings will inspire design of integrated adsorptive techniques for treating complex organic wastewater with high efficiency and low cost.
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Affiliation(s)
- Da Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China
| | - Fuqiang Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China; State Environmental Protection Engineering Center for Organic Chemical Industrial Waste Water Disposal Resource Reuse, Nanjing 210046, PR China.
| | - Lidan Zong
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China
| | - Xiaowen Sun
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China
| | - Xiaopeng Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China
| | - Changqing Zhu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China
| | - Xuewen Tao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China
| | - Aimin Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China; State Environmental Protection Engineering Center for Organic Chemical Industrial Waste Water Disposal Resource Reuse, Nanjing 210046, PR China
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25
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Abstract
Cellulose has emerged as an attractive substrate for the production of economical, disposable, point-of-care (POC) analytical devices. Development of novel methods of (bio)activation is central to broadening the application space of cellulosic materials. Ironically, such efforts are stymied by the inherent biocompatibility and recalcitrance of cellulose fibers. Here, we have elaborated a versatile, chemo-enzymatic approach to activate cellulosic materials for CuAAC "click chemistry", to develop new fluorogenic esterase sensors. Gentle, aqueous modification conditions facilitate broad applicability to cellulose papers, gauzes, and hydrogels. Tethering of the released fluorophore to the cellulose surface prevents signal degradation due to diffusion and enables straightforward, sensitive visualization with a simple light source in resource-limited situations.
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Affiliation(s)
- Fatemeh Derikvand
- The Michael Smith Laboratories and Department of Chemistry, University of British Columbia , 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - DeLu Tyler Yin
- The Michael Smith Laboratories and Department of Chemistry, University of British Columbia , 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Ryan Barrett
- The Michael Smith Laboratories and Department of Chemistry, University of British Columbia , 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Harry Brumer
- The Michael Smith Laboratories and Department of Chemistry, University of British Columbia , 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
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26
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Ligational behavior of clioquinol antifungal drug towards Ag(I), Hg(II), Cr(III) and Fe(III) metal ions: Synthesis, spectroscopic, thermal, morphological and antimicrobial studies. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.12.081] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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27
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Gallucci MN, Carezzano ME, Oliva MM, Demo MS, Pizzolitto RP, Zunino MP, Zygadlo JA, Dambolena JS. In vitro activity of natural phenolic compounds against fluconazole-resistant Candida species: a quantitative structure-activity relationship analysis. J Appl Microbiol 2014; 116:795-804. [PMID: 24387763 DOI: 10.1111/jam.12432] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 12/18/2013] [Accepted: 12/30/2013] [Indexed: 11/29/2022]
Abstract
AIMS To evaluate the antifungal activity and to analyse the structure-activity relationship of eleven natural phenolic compounds against four Candida species which are resistant to fluconazole. METHODS AND RESULTS Four different species of Candida isolates were used: Candida albicans, Candida krusei, Candida tropicalis and Candida dubliniensis. The phenolic compound carvacrol showed the highest anti-Candida bioactivity, followed by thymol and isoeugenol. The obtained minimum inhibitory concentration (MIC) values obtained were used in a quantitative structure-activity relationship (QSAR) analysis where the electronic, steric, thermodynamic and topological descriptors served as dependent variables. According to the descriptors obtained in this QSAR study, the antifungal activity of phenols has a first action specific character which is based on their interaction with plasma or mitochondrial membranes. The second action is based on a steric descriptor-the maximal and minimal projection of the area-which could explain the inability of some phenolic compounds to be biotransformed to quinones methylene by Candida species. CONCLUSIONS According to the descriptors obtained in this QSAR study, the anti-Candida activity of ortho-substituted phenols is due to more than one action mechanism. The anti-Candida activity of phenolic compounds can be predicted by their molecular properties and structural characteristics. SIGNIFICANCE AND IMPACT OF THE STUDY These results could be employed to predict the anti-Candida activity of new phenolic compounds in the search for new alternatives or complementary therapies to combat against candidiasis.
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Affiliation(s)
- M N Gallucci
- Departamento de Microbiología e Inmunología, Universidad Nacional de Río Cuarto (UNRC), Córdoba, Argentina
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Kuska MS, Witham AA, Sproviero M, Manderville RA, Majdi Yazdi M, Sharma P, Wetmore SD. Structural Influence of C8-Phenoxy-Guanine in the NarI Recognition DNA Sequence. Chem Res Toxicol 2013; 26:1397-408. [DOI: 10.1021/tx400252g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Michael S. Kuska
- Departments
of Chemistry and Toxicology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
| | - Aaron A. Witham
- Departments
of Chemistry and Toxicology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
| | - Michael Sproviero
- Departments
of Chemistry and Toxicology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
| | - Richard A. Manderville
- Departments
of Chemistry and Toxicology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
| | - Mohadeseh Majdi Yazdi
- Department
of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, Alberta, Canada T1K 3M4
| | - Purshotam Sharma
- Department
of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, Alberta, Canada T1K 3M4
| | - Stacey D. Wetmore
- Department
of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, Alberta, Canada T1K 3M4
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29
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Chakraborty A, Pan S, Chattaraj PK. Biological Activity and Toxicity: A Conceptual DFT Approach. STRUCTURE AND BONDING 2013. [DOI: 10.1007/978-3-642-32750-6_5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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30
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Witham AA, Beach DG, Gabryelski W, Manderville RA. Hydroxyl Radical-Induced Oxidation of a Phenolic C-Linked 2′-Deoxyguanosine Adduct Yields a Reactive Catechol. Chem Res Toxicol 2012; 25:315-25. [DOI: 10.1021/tx200365r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Aaron A. Witham
- Departments
of Chemistry and Toxicology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
| | - Daniel G. Beach
- Departments
of Chemistry and Toxicology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
| | - Wojciech Gabryelski
- Departments
of Chemistry and Toxicology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
| | - Richard A. Manderville
- Departments
of Chemistry and Toxicology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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31
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Zhang J, He X, Gao H. The structure elucidation of mequindox and 1,4-bisdesoxymequindox: NMR analyses, FT-IR spectra, DFT calculations and thermochemical studies. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.07.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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32
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Omumi A, Millen AL, Wetmore SD, Manderville RA. Fluorescent properties and conformational preferences of C-linked phenolic-DNA adducts. Chem Res Toxicol 2011; 24:1694-709. [PMID: 21905681 DOI: 10.1021/tx200247f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Phenolic toxins and mutagenic diazoquinones generate C-linked adducts at the C8 site of 2'-deoxyguanosine (dG) through the intermediacy of radical species. We have previously reported the site-specific incorporation of these adducts into oligonucleotides using a postsynthetic palladium-catalyzed cross-coupling strategy [Omumi (2011 ) J. Am. Chem. Soc. 133 , 42 - 50 ]. We report here the structural impact of these lesions within two decanucleotide sequences containing either 5'- and 3'-flanking pyrimidines or purines. In the complementary strands, the base opposite (N) the C-linked adduct was varied to determine the possibility of mismatch stabilization by the modified nucleobases. The resulting adducted duplex structures were characterized using UV thermal denaturation studies, circular dichroism, fluorescence spectroscopy, and molecular dynamics (MD) simulations. The experimental data showed the C-linked adducts to destabilize the duplex when base paired with its normal partner C but to increase duplex stability within a G:G mismatch. The stabilization within the G:G mismatch was sequence dependent, with flanking purine bases playing a key role in the stabilizing influence of the adduct. MD simulations showed no large structural changes to the B form double helix, regardless of the (anti/syn) adduct preference. Consideration of H-bonding and stacking interactions derived from the MD simulations together with the thermal melting data and changes in fluorescent emission of the adducts upon hybridization to the complementary strands implied that the C-linked phenolic adducts preferentially adopt the syn-conformation within both duplexes regardless of the opposite base N. Given that biological outcome in terms of mutagenicity appears to be strongly correlated to the conformational preference of the corresponding N-linked C8-dG adducts, the potential biological implications of phenolic C-linked adducts are discussed.
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Affiliation(s)
- Alireza Omumi
- Departments of Chemistry and Toxicology, University of Guelph, Guelph, Ontario, Canada
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Zitka O, Sochor J, Rop O, Skalickova S, Sobrova P, Zehnalek J, Beklova M, Krska B, Adam V, Kizek R. Comparison of various easy-to-use procedures for extraction of phenols from apricot fruits. Molecules 2011; 16:2914-36. [PMID: 21464799 PMCID: PMC6260627 DOI: 10.3390/molecules16042914] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 03/25/2011] [Accepted: 03/31/2011] [Indexed: 12/26/2022] Open
Abstract
Phenols are broadly distributed in the plant kingdom and are the most abundant secondary metabolites of plants. Plant polyphenols have drawn increasing attention due to their potential antioxidant properties and their marked effects in the prevention of various oxidative stress associated diseases such as cancer. The objective of this study was to investigate a suitable method for determination of protocatechuic acid, 4-aminobenzoic acid, chlorogenic acid, caffeic acid, vanillin, p-coumaric acid, rutin, ferulic acid, quercetin, resveratrol and quercitrin from apricot samples. A high-performance liquid chromatograph with electrochemical and UV detectors was used. The method was optimized in respect to both the separation selectivity of individual phenolic compounds and the maximum sensitivity with the electrochemical detection. The lowest limits of detection (3 S/N) using UV detection were estimated for ferulic acid (3 µM), quercitrin (4 µM) and quercetin (4 µM). Using electrochemical detection values of 27 nM, 40 nM and 37 nM were achieved for ferulic acid, quercitrin and quercetin, respectively. It follows from the acquired results that the coulometric detection under a universal potential of 600 mV is more suitable and sensitive for polyphenols determination than UV detection at a universal wavelength of 260 nm. Subsequently, we tested the influence of solvent composition, vortexing and sonication on separation efficiency. Our results showed that a combination of water, acetone and methanol in 20:20:60 ratio was the most effective for p-aminobenzoic acid, chlorgenic acid, caffeic acid, protocatechuic acid, ferulic acid, rutin, resveratrol and quercetin, in comparison with other solvents. On the other hand, vortexing at 4 °C produced the highest yield. Moreover, we tested the contents of individual polyphenols in the apricot cultivars Mamaria, Mold and LE-1075. The major phenolic compounds were chlorgenic acid and rutin. Chlorgenic acid was found in amounts of 2,302 mg/100 g in cultivar LE-1075, 546 mg/100 g in cultivar Mamaria and 129 mg/100 g in cultivar Mold. Generally, the cultivar LE-1075 produced the highest polyphenol content values, contrary to Mold, which compared to cultivar LE-1075 was quite poor from the point of view of the phenolics content.
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Affiliation(s)
- Ondrej Zitka
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Jiri Sochor
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Otakar Rop
- Department of Food Technology and Microbiology, Faculty of Technology, Tomas Bata University in Zlin, Namesti T. G. Masaryka 275, CZ-762 72 Zlin, Czech Republic
| | - Sylvie Skalickova
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Pavlina Sobrova
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Josef Zehnalek
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Miroslava Beklova
- Department of Veterinary Ecology and Environmental Protection, University of Veterinary and Pharmaceutical Sciences, Palackeho 1-3, CZ-61242 Brno, Czech Republic
| | - Boris Krska
- Department of Fruit Growing, Faculty of Horticulture, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Rene Kizek
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
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Ghalkhani M, Fernandes IP, Oliveira SCB, Shahrokhian S, Oliveira–Brett AM. Anodic behavior of clioquinol at a glassy carbon electrode. Bioelectrochemistry 2011; 80:175-81. [DOI: 10.1016/j.bioelechem.2010.10.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Revised: 10/08/2010] [Accepted: 10/10/2010] [Indexed: 11/25/2022]
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A-CD Estrogens. I. Substituent Effects, Hormone Potency, and Receptor Subtype Selectivity in a New Family of Flexible Estrogenic Compounds. J Med Chem 2010; 54:433-48. [DOI: 10.1021/jm100513m] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Coulombel L, Nolan LC, Nikodinovic J, Doyle EM, O’Connor KE. Biotransformation of 4-halophenols to 4-halocatechols using Escherichia coli expressing 4-hydroxyphenylacetate 3-hydroxylase. Appl Microbiol Biotechnol 2010; 89:1867-75. [DOI: 10.1007/s00253-010-2969-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Revised: 10/19/2010] [Accepted: 10/19/2010] [Indexed: 10/18/2022]
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