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Munyayi TA, Mulder DW, Conradie EH, Vorster BC. Feasibility of NAD(P)/NAD(P)H as redox agents in enzymatic plasmonic gold nanostar assays for galactose quantification. ROYAL SOCIETY OPEN SCIENCE 2023; 10:230825. [PMID: 37830025 PMCID: PMC10565372 DOI: 10.1098/rsos.230825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 09/12/2023] [Indexed: 10/14/2023]
Abstract
Plasmonic colorimetric sensors have emerged as powerful analytical tools in biochemistry due to their localized surface plasmon resonance extinction in the visible range. Here, we describe the feasibility of NAD(P)/NAD(P)H as redox agents in enzymatic plasmonic gold nanostar (AuNS) assays for galactose quantification using three model enzymes, GalDH, AR and GalOx, immobilized separately on polyvinylpyrrolidone-capped AuNS scaffolds. These highly specific, sensitive and selective bioassays induce the transformation of AuNS into quasi-spherical nanoparticles during the biorecognition of galactose in water and synthetic blood matrices. As a result, using our inexpensive and simple AuNS plasmon bioassays, the presence of galactose may be detected spectrophotometrically and by the naked eye.
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Affiliation(s)
- Tozivepi Aaron Munyayi
- Centre For Human Metabolomics, Department of Biochemistry, North West University Potchefstroom, 11 Hoffman Street, Potchefstroom 2531, South Africa
| | - Danielle Wingrove Mulder
- Centre For Human Metabolomics, Department of Biochemistry, North West University Potchefstroom, 11 Hoffman Street, Potchefstroom 2531, South Africa
| | - Engela Helena Conradie
- Centre For Human Metabolomics, Department of Biochemistry, North West University Potchefstroom, 11 Hoffman Street, Potchefstroom 2531, South Africa
| | - Barend Christiaan Vorster
- Centre For Human Metabolomics, Department of Biochemistry, North West University Potchefstroom, 11 Hoffman Street, Potchefstroom 2531, South Africa
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Lee YS, Gerulskis R, Minteer SD. Advances in electrochemical cofactor regeneration: enzymatic and non-enzymatic approaches. Curr Opin Biotechnol 2021; 73:14-21. [PMID: 34246871 DOI: 10.1016/j.copbio.2021.06.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 06/12/2021] [Accepted: 06/13/2021] [Indexed: 11/28/2022]
Abstract
Nicotinamide adenine dinucleotide(NAD(P)H) is a metabolically interconnected redox cofactor serving as a hydride source for the majority of oxidoreductases, and consequently constituting a significant cost factor for bioprocessing. Much research has been devoted to the development of efficient, affordable, and sustainable methods for the regeneration of these cofactors through chemical, electrochemical, and photochemical approaches. However, the enzymatic approach using formate dehydrogenase is still the most abundantly employed in industrial applications, even though it suffers from system complexity and product purity issues. In this review, we summarize non-enzymatic and enzymatic electrochemical approaches for cofactor regeneration, then discuss recent developments to solve major issues. Issues discussed include Rh-catalyst mediated enzyme mutual inactivation, electron-transfer rates, catalyst sustainability, product selectivity and simplifying product purification. Recently reported remedies are discussed, such as heterogeneous metal catalysts generating H+ as the sole byproduct or high activity and stability redox-polymer immobilized enzymatic systems for sustainable organic synthesis.
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Affiliation(s)
- Yoo Seok Lee
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, UT 84112, USA.
| | - Rokas Gerulskis
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, UT 84112, USA
| | - Shelley D Minteer
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, UT 84112, USA.
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Wang Q, Lu X, Zhen Y, Li WQ, Chen GH, Yang Y. Structure, stability, electronic, magnetic, and catalytic properties of monometallic Pd, Au, and bimetallic Pd-Au core-shell nanoparticles. J Chem Phys 2018; 149:244307. [PMID: 30599716 DOI: 10.1063/1.5066332] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Bimetallic core-shell nanoparticles (CSNPs) often exhibit excellent and tunable properties, depending on their composition, sizes, morphology, atomic arrangement, thickness, and sequence of both core and shell. In this study, the geometrical structure, thermodynamic stability, chemical activity, electronic and magnetic properties, and catalytic activity in the hydrogen evolution reaction (HER) of 13- and 55-atom Pd, Au NPs, and Pd-Au CSNPs were systematically investigated using density functional theory calculations. The results showed that Au atoms prefer to segregate to the surface-shell, while Pd atoms were inclined to aggregate in the core region for bimetallic Pd-Au CSNPs; therefore, Pd@Au CSNPs with an Au surface-shell were thermodynamically more favorable than both the monometallic Pd/Au NPs and the Au@Pd CSNPs with a Pd surface-shell. The Pd surface-shell of the Au@Pd CSNPs displayed a positive charge, while the Au surface-shell of the Au@Pd CSNPs exhibited a negative charge due to the charge transfer in the Pd-Au CSNPs, resulting in that the d-band center of Au@Pd with the Pd surface-shell showed larger shift toward the Fermi level and higher chemical activity. The Pd@Au CSNPs with the Au surface-shell showed similar d-band curves and d-band centers with monometallic Au NPs. All 13-atom Pd, Au NPs, and Pd-Au CSNPs were magnetic, while the 55-atom NPs were non-magnetic with symmetry partial density of states' curves except for Pd55. Changing the location of Pd and Au atoms in the Pd-Au CSNPs influenced their total magnetic moments. In addition, an opposite trend was found: small 13-atom NPs with a Pd surface-shell showed superior HER activity to the ones with an Au surface-shell, while large 55-atom NPs with an Au surface-shell possessed higher HER activity than the ones with a Pd surface-shell.
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Affiliation(s)
- Qiang Wang
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis (IAS), Nanjing Tech University, Nanjing 211816, People's Republic of China
| | - Xianfei Lu
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis (IAS), Nanjing Tech University, Nanjing 211816, People's Republic of China
| | - Yanzhong Zhen
- School of Petroleum Engineering and Environmental Engineering, Yanan University, Yan'an 716000, Shaanxi, People's Republic of China
| | - Wei-Qi Li
- Department of Physics, Harbin Institute of Technology, Harbin 150001, People's Republic of China
| | - Guang-Hui Chen
- Department of Chemistry, Shantou University, Guangdong, Shantou 515063, People's Republic of China
| | - Yanhui Yang
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis (IAS), Nanjing Tech University, Nanjing 211816, People's Republic of China
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Rostek A, Breisch M, Loza K, Garcia PRAF, Oliveira CLP, Prymak O, Heggen M, Köller M, Sengstock C, Epple M. Wet-Chemical Synthesis of Pd-Au Core-Shell Nanoparticles (8 nm): From Nanostructure to Biological Properties. ChemistrySelect 2018. [DOI: 10.1002/slct.201800638] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alexander Rostek
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE); University of Duisburg-Essen; Universitaetsstr. 7 45141 Essen Germany
| | - Marina Breisch
- Bergmannsheil University Hospital/Surgical Research; Ruhr-University of Bochum; Bürkle-de-la-Camp-Platz 1 44789 Bochum Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE); University of Duisburg-Essen; Universitaetsstr. 7 45141 Essen Germany
| | - Paulo R. A. F. Garcia
- Institute of Physics; University of São Paulo; Rua do Matão 1371, São Paulo São Paulo 05314-970 Brazil
| | - Cristiano L. P. Oliveira
- Institute of Physics; University of São Paulo; Rua do Matão 1371, São Paulo São Paulo 05314-970 Brazil
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE); University of Duisburg-Essen; Universitaetsstr. 7 45141 Essen Germany
| | - Marc Heggen
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons; Forschungszentrum Jülich GmbH; 52425 Jülich Germany
| | - Manfred Köller
- Bergmannsheil University Hospital/Surgical Research; Ruhr-University of Bochum; Bürkle-de-la-Camp-Platz 1 44789 Bochum Germany
| | - Christina Sengstock
- Bergmannsheil University Hospital/Surgical Research; Ruhr-University of Bochum; Bürkle-de-la-Camp-Platz 1 44789 Bochum Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE); University of Duisburg-Essen; Universitaetsstr. 7 45141 Essen Germany
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Mao H, Zhang H, Jiang W, Liang J, Sun Y, Zhang Y, Wu Q, Zhang G, Song XM. Poly(ionic liquid) functionalized polypyrrole nanotubes supported gold nanoparticles: An efficient electrochemical sensor to detect epinephrine. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:495-502. [DOI: 10.1016/j.msec.2017.02.083] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 12/20/2016] [Accepted: 02/15/2017] [Indexed: 10/20/2022]
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Spitale A, Perez MA, Mejía-Rosales S, Yacamán MJ, Mariscal MM. Gold-palladium core@shell nanoalloys: experiments and simulations. Phys Chem Chem Phys 2016; 17:28060-7. [PMID: 25735727 DOI: 10.1039/c4cp06012a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we report a facile synthesis route, structural characterization, and full atomistic simulations of gold-palladium nanoalloys. Through aberration corrected-STEM, UV-vis spectroscopy and EDS chemical analysis, we were able to determine that Au(core)-Pd(shell) bimetallic nanoparticles were formed. Using different computational approaches, we were capable of establishing how the size of the core and the thickness of the shell will affect the thermodynamic stability of several core-shell nanoalloys. Finally, grand canonical simulations using different sampling procedures were used to study the growth mechanism of Pd atoms on Au seeds of different shapes.
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Affiliation(s)
- A Spitale
- INFIQC, CONICET. Departamento de Matemática y Física, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, X5000HUA, Argentina.
| | - M A Perez
- INFIQC, CONICET. Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, X5000HUA, Argentina
| | - S Mejía-Rosales
- Center for Innovation and Research in Engineering and Technology, and CICFIM-Facultad de Ciencias Físico-Matemáticas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, NL 66450, Mexico
| | - M J Yacamán
- Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
| | - M M Mariscal
- INFIQC, CONICET. Departamento de Matemática y Física, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, X5000HUA, Argentina.
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Liman R. Genotoxic effects of Bismuth (III) oxide nanoparticles by Allium and Comet assay. CHEMOSPHERE 2013; 93:269-73. [PMID: 23790828 DOI: 10.1016/j.chemosphere.2013.04.076] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 02/21/2013] [Accepted: 04/27/2013] [Indexed: 05/25/2023]
Abstract
Genotoxic effects of Bismuth (III) oxide nanoparticles (BONPs) were investigated on the root cells of Allium cepa by Allium and Comet assay. A. cepa roots were treated with the aqueous dispersions of BONPs at five different concentrations (12.5, 25, 50, 75, and 100ppm) for 4h. Exposure of BONPs significantly increased mitotic index (MI) except 12.5ppm, total chromosomal aberrations (CAs) in Allium test. While stickiness chromosome laggards, disturbed anaphase-telophase and anaphase bridges were observed in anaphase-telophase cells, pro-metaphase and c-metaphase in other cells. A significant increase in DNA damage was also observed at all concentrations of BONPs except 12.5ppm by Comet assay. The results were also analyzed statistically by using SPSS for Windows; Duncan's multiple range test was performed. These results indicate that BONPs exhibit genotoxic activity in A. cepa root meristematic cells.
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Affiliation(s)
- Recep Liman
- Usak University, Faculty of Arts and Sciences, Molecular Biology and Genetics Department, 1 Eylül Campus, 64300 Uşak, Turkey.
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Tang L, Lei X, Zeng G, Liu Y, Peng Y, Wu M, Zhang Y, Liu C, Li Z, Shen G. Optical detection of NADH based on biocatalytic growth of Au-Ag core-shell nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 99:390-393. [PMID: 23022612 DOI: 10.1016/j.saa.2012.09.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 08/26/2012] [Accepted: 09/04/2012] [Indexed: 06/01/2023]
Abstract
We have developed an optical assay for NADH (Dihydronicotinamide adenine dinucleotide) based on the catalytic growth of gold-silver core-shell nanoparticles (Au-Ag-CSNPs). The nanoparticles were immobilized on pretreated glass slide and are shown to catalyze the NADH-mediated reduction of Ag(I) ions in the presence of 1,4-benzoquinone and cetyltrimethyl ammonium ion. This leads to the formation of Au-Ag-CSNPs on the glass. The absorption peak of the Au-Ag-CSNPs at 415 nm increases with the concentration of NADH in the solution used, and this can be measured by UV-vis photometry. High-resolution scanning electron microscopy analysis of the morphology of the surface of the Au-Ag-CSNPs before and after the catalytic reaction revealed a growth of their diameter. Under optimal conditions, NADH can be determined in the concentration range from 0.2 to 3.2mM, and the detection limit is 15.6 μM. The sensor has good precision and good storage stability, simple in operation, and can be fabricated at low costs, which made it suitable for the determination of NADH in complex biological systems and in related degradation processes of contaminants.
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Affiliation(s)
- Lin Tang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
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Oviedo O, Reinaudi L, Mariscal M, Leiva E. Thermodynamic stability of electrochemically decorated Au–Pd core@shell nanoparticles. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.05.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Doak SH, Manshian B, Jenkins GJS, Singh N. In vitro genotoxicity testing strategy for nanomaterials and the adaptation of current OECD guidelines. Mutat Res 2012; 745:104-11. [PMID: 21971291 PMCID: PMC4028084 DOI: 10.1016/j.mrgentox.2011.09.013] [Citation(s) in RCA: 148] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Accepted: 09/12/2011] [Indexed: 04/13/2023]
Abstract
There is a pressing requirement to define a hazard identification and risk management strategy for nanomaterials due to the rapid growth in the nanotechnology industry and their promise of life-style revolutions through the development of wide-ranging nano-containing consumer products. Consequently, a battery of well defined and appropriate in vitro assays to assess a number of genotoxicity endpoints is required to minimise extensive and costly in vivo testing. However, the validity of the established protocols in current OECD recognised genotoxicity assays for nanomaterials is currently being questioned. In this report, we therefore consider the in vitro OECD genotoxicity test battery including the Ames, micronucleus and HPRT forward mutation assays, and their potential role in the safety assessment of nanomaterial induced DNA damage in vitro.
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Affiliation(s)
- S H Doak
- Institute of Life Science, College of Medicine, Swansea University, Singleton Park, Swansea SA2 8PP, Wales, UK.
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Abstract
The electrochemical behavior of Nitroso-R-salt (NRS) in aqueous solutions and the influence of pH are investigated. In alkaline solution, the electrode reaction of NRS exhibits stagnant electrode kinetics. With rising acid concentration, it exhibits more and more fast electrode kinetics and a diffusion-controlled process. Thus, acidic aqueous solutions are favorable for the NRS as active species of a redox flow battery (RFB). Average coulombic and energy efficiencies of the NRS/Zn RFB are 93.2 and 80.6%, respectively, showing that self-discharge is small. The preliminary exploration shows that the NRS is electrochemically promising for RFB application.
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Mao H, Li Y, Liu X, Zhang W, Wang C, Al-Deyab SS, El-Newehy M. The application of novel spindle-like polypyrrole hollow nanocapsules containing Pt nanoparticles in electrocatalysis oxidation of nicotinamide adenine dinucleotide (NADH). J Colloid Interface Sci 2011; 356:757-62. [PMID: 21310424 DOI: 10.1016/j.jcis.2011.01.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 12/29/2010] [Accepted: 01/02/2011] [Indexed: 11/17/2022]
Abstract
Novel spindle-like polypyrrole hollow nanocapsules containing Pt nanoparticles (Pt NPs/PPy composite hollow nanospindles) were successfully prepared by using beta-akaganeite (β-Fe(3+)O(OH,Cl)) nanospindles as templates and methanoic acid as a reducing agent. The β-Fe(3+)O(OH,Cl) templates can be easily obtained in ethanol/water mixing solution in the presence of thiophene and FeCl(3)·6H(2)O, and after coating by PPy shell, they can be gradually and completely etched during the reduction of H(2)PtCl(6) into Pt nanoparticles (Pt NPs) with the average size of 3.6 nm on spindle-like polypyrrole hollow nanocapsules, which could still keep their integrality of morphologies with the thickness of PPy shell of 18-20 nm. The investigation of Pt NPs/PPy composite hollow nanospindles modified glassy carbon electrode (GCE) for the application to detect nicotinamide adenine dinucleotide (NADH) with cyclic voltammetry (CV) and amperometry indicated good linearity and sensitivity of responses in the certain range of NADH concentration. The influence of Pt NPs content to the NADH oxidation current was also studied. This new kind of unique spindle-like noble metal/conducting polymer hollow nanostructured complex can be acted as a good steady electrode material for electrocatalytic oxidation of NADH.
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Affiliation(s)
- Hui Mao
- Alan G. MacDiarmid Institute, Jilin University, Changchun, PR China
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Abstract
There is little doubt that nanoparticles offer real and new opportunities in many fields, such as biomedicine and materials science. Such particles are small enough to enter almost all areas of the body, including cells and organelles, potentially leading to new approaches in nanomedicine. Sensors for small molecules of biochemical interest are of critical importance. This review is an attempt to trace the use of nanomaterials in biochemical sensor design. The possibility of using nanoparticles functionalized with antibodies as markers for proteins will be elucidated. Moreover, capabilities and applications for nanoparticles based on gold, silver, magnetic, and semiconductor materials (quantum dots), used in optical (absorbance, luminescence, surface enhanced Raman spectroscopy, surface plasmon resonance), electrochemical, and mass-sensitive sensors will be highlighted. The unique ability of nanosensors to improve the analysis of biochemical fluids is discussed either through considering the use of nanoparticles for in vitro molecular diagnosis, or in the biological/biochemical analysis for in vivo interaction with the human body.
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Affiliation(s)
- Afaf El-Ansary
- Biochemistry Department, Science College, and Pharmacology Department, Pharmacy College, King Saud University, Riyadh, Saudi Arabia
| | - Layla M Faddah
- Biochemistry Department, Science College, and Pharmacology Department, Pharmacy College, King Saud University, Riyadh, Saudi Arabia
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