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Aricov L, Precupas A, Tudose M, Baltag D, Trică B, Sandu R, Leonties AR. Trametes versicolor laccase activity modulated by the interaction with gold nanoparticles. ENVIRONMENTAL RESEARCH 2023; 237:116920. [PMID: 37597828 DOI: 10.1016/j.envres.2023.116920] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/08/2023] [Accepted: 08/17/2023] [Indexed: 08/21/2023]
Abstract
In this study, the impact of gold nanoparticles (AuNPs) on the structure and activity of laccase from Trametes versicolor (Lc) was described. Fluorescence experiments revealed that AuNPs efficiently quench Lc's tryptophan fluorescence by a static and dynamic process. By using differential scanning microcalorimetry and circular dichroism spectroscopy, it was determined how the concentration of nanoparticles and the composition of the medium affected the secondary structure of Lc. The data revealed that upon binding with AuNPs, conformational changes take place mainly in presence of high amounts of nanoparticles. The complex kinetic analysis unveiled the Lc activity enhancement at low concentrations of AuNPs as opposed to the concentrated regime, where it can be reduced by up to 55%. The Michaelis-Menten tests highlighted that the activity of the biocatalyst is closely related to the concentration of AuNPs, while the Selwyn analysis demonstrated that even in a concentrated regime of Lc it is not deactivated regardless of the amount of AuNPs added. The thermal parameters improved by twofold in the presence of low AuNPs concentration, whereas the activation energy increased with AuNPs content, implying that not all collisions are beneficial to the enzyme structure. The effect of AuNPs on the decomposition of a recalcitrant dye (naphthol green B, NG) by Lc was also evaluated, and the Michaelis-Menten model revealed that only the high AuNPs content influenced negatively the Lc activity. The isothermal titration calorimetry revealed that hydrogen bonds are the main intermolecular forces between Lc and AuNPs, while electrostatic interactions are responsible for NG adsorption to AuNPs. The results of the docking analysis show the binding of NG near the copper T1 site of Lc with hydrogen bonds, electrostatic and hydrophobic interactions. The findings of this work provide important knowledge for laccase-based bio-nanoconjugates and their use in the field of environmental remediation.
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Affiliation(s)
- Ludmila Aricov
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Spl. Independentei 202, 060021, Bucharest, Romania
| | - Aurica Precupas
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Spl. Independentei 202, 060021, Bucharest, Romania.
| | - Madalina Tudose
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Spl. Independentei 202, 060021, Bucharest, Romania
| | - Dragos Baltag
- Department of Physical Chemistry, Faculty of Chemistry, University of Bucharest, Bd. Elisabeta 4-12, 030018, Bucharest, Romania; National Institute for Research and Development in Chemistry and Petrochemistry - ICECHIM, Spl. Independentei 202, 060021, Bucharest, Romania
| | - Bogdan Trică
- National Institute for Research and Development in Chemistry and Petrochemistry - ICECHIM, Spl. Independentei 202, 060021, Bucharest, Romania
| | - Romica Sandu
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Spl. Independentei 202, 060021, Bucharest, Romania
| | - Anca Ruxandra Leonties
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Spl. Independentei 202, 060021, Bucharest, Romania.
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Reilly K, Ellis LJA, Davoudi HH, Supian S, Maia MT, Silva GH, Guo Z, Martinez DST, Lynch I. Daphnia as a model organism to probe biological responses to nanomaterials-from individual to population effects via adverse outcome pathways. FRONTIERS IN TOXICOLOGY 2023; 5:1178482. [PMID: 37124970 PMCID: PMC10140508 DOI: 10.3389/ftox.2023.1178482] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 04/06/2023] [Indexed: 05/02/2023] Open
Abstract
The importance of the cladoceran Daphnia as a model organism for ecotoxicity testing has been well-established since the 1980s. Daphnia have been increasingly used in standardised testing of chemicals as they are well characterised and show sensitivity to pollutants, making them an essential indicator species for environmental stress. The mapping of the genomes of D. pulex in 2012 and D. magna in 2017 further consolidated their utility for ecotoxicity testing, including demonstrating the responsiveness of the Daphnia genome to environmental stressors. The short lifecycle and parthenogenetic reproduction make Daphnia useful for assessment of developmental toxicity and adaption to stress. The emergence of nanomaterials (NMs) and their safety assessment has introduced some challenges to the use of standard toxicity tests which were developed for soluble chemicals. NMs have enormous reactive surface areas resulting in dynamic interactions with dissolved organic carbon, proteins and other biomolecules in their surroundings leading to a myriad of physical, chemical, biological, and macromolecular transformations of the NMs and thus changes in their bioavailability to, and impacts on, daphnids. However, NM safety assessments are also driving innovations in our approaches to toxicity testing, for both chemicals and other emerging contaminants such as microplastics (MPs). These advances include establishing more realistic environmental exposures via medium composition tuning including pre-conditioning by the organisms to provide relevant biomolecules as background, development of microfluidics approaches to mimic environmental flow conditions typical in streams, utilisation of field daphnids cultured in the lab to assess adaption and impacts of pre-exposure to pollution gradients, and of course development of mechanistic insights to connect the first encounter with NMs or MPs to an adverse outcome, via the key events in an adverse outcome pathway. Insights into these developments are presented below to inspire further advances and utilisation of these important organisms as part of an overall environmental risk assessment of NMs and MPs impacts, including in mixture exposure scenarios.
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Affiliation(s)
- Katie Reilly
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Laura-Jayne A. Ellis
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Hossein Hayat Davoudi
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Suffeiya Supian
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Marcella T. Maia
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Gabriela H. Silva
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Zhiling Guo
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
- *Correspondence: Zhiling Guo, ; Iseult Lynch,
| | - Diego Stéfani T. Martinez
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
- *Correspondence: Zhiling Guo, ; Iseult Lynch,
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Li X, Guo W, Xu R, Song Z, Ni T. The interaction mechanism between gold nanoparticles and proteins: Lysozyme, trypsin, pepsin, γ-globulin, and hemoglobin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 272:120983. [PMID: 35149482 DOI: 10.1016/j.saa.2022.120983] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/25/2022] [Accepted: 01/29/2022] [Indexed: 06/14/2023]
Abstract
In this study, the interaction between gold nanoparticles (AuNPs) and proteins (including lysozyme, trypsin, pepsin, γ-globulin and hemoglobin) was investigated by UV-visible absorption spectroscopy, fluorescence spectroscopy, circular dichroism (CD) spectroscopy and protein activity assay. AuNPs was synthesized using reduction of HAuCl4 with sodium citrate. The formation of AuNPs was confirmed from the characteristic surface plasmon resonance band at 521 nm and transmission electron microscopy revealed the average particle size was about 10 nm. The results reveal that AuNPs can interact with proteins to form a "protein corona (PC)", but the protein concentration required to form a relatively stable PC is not the same. The quenching mechanism of proteins by AuNPs is arisen from static quenching. The binding constants of AuNPs with proteins are in the range from 106 to 1010 L mol-1, and the order is pepsin > γ-globulin > hemoglobin > trypsin > lysozyme at 298 K. Van der Waals forces and hydrogen bonds are the main forces for the lysozyme-AuNPs system. The interaction between trypsin/pepsin/γ-globulin/hemoglobin and AuNPs is mainly by hydrophobic interaction. The addition of AuNPs has an effect on the secondary structure of proteins as confirmed from CD spectra. The change in secondary structure of different proteins is different and seems to have little relation with the binding constant. The activity of lysozyme/trypsin/pepsin decreases with the addition of AuNPs.
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Affiliation(s)
- Xiangrong Li
- Department of Medical Chemistry, Key Laboratory of Medical Molecular Probes, School of Basic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, PR China.
| | - Wei Guo
- Department of Medical Chemistry, Key Laboratory of Medical Molecular Probes, School of Basic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, PR China
| | - Ruonan Xu
- Department of Medical Chemistry, Key Laboratory of Medical Molecular Probes, School of Basic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, PR China
| | - Zhizhi Song
- Grade 2020, Clinical Medicine, School of Basic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, PR China
| | - Tianjun Ni
- Department of Medical Chemistry, Key Laboratory of Medical Molecular Probes, School of Basic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, PR China
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Farouq MAH, Kubiak-Ossowska K, Al Qaraghuli MM, Ferro VA, Mulheran PA. Functionalisation of Inorganic Material Surfaces with Staphylococcus Protein A: A Molecular Dynamics Study. Int J Mol Sci 2022; 23:ijms23094832. [PMID: 35563221 PMCID: PMC9103475 DOI: 10.3390/ijms23094832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/21/2022] [Accepted: 04/25/2022] [Indexed: 12/07/2022] Open
Abstract
Staphylococcus protein A (SpA) is found in the cell wall of Staphylococcus aureus bacteria. Its ability to bind to the constant Fc regions of antibodies means it is useful for antibody extraction, and further integration with inorganic materials can lead to the development of diagnostics and therapeutics. We have investigated the adsorption of SpA on inorganic surface models such as experimentally relevant negatively charged silica, as well as positively charged and neutral surfaces, by use of fully atomistic molecular dynamics simulations. We have found that SpA, which is itself negatively charged at pH7, is able to adsorb on all our surface models. However, adsorption on charged surfaces is more specific in terms of protein orientation compared to a neutral Au (111) surface, while the protein structure is generally well maintained in all cases. The results indicate that SpA adsorption is optimal on the siloxide-rich silica surface, which is negative at pH7 since this keeps the Fc binding regions free to interact with other species in solution. Due to the dominant role of electrostatics, the results are transferable to other inorganic materials and pave the way for new diagnostic and therapeutic designs where SpA might be used to conjugate antibodies to nanoparticles.
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Affiliation(s)
- Mohammed A. H. Farouq
- Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow G1 1XJ, UK; (M.M.A.Q.); (P.A.M.)
- Correspondence: ; Tel.: +44-01-4155-24400
| | - Karina Kubiak-Ossowska
- Department of Physics/Archie-West HPC, University of Strathclyde, 107 Rottenrow East, Glasgow G4 0NG, UK;
| | - Mohammed M. Al Qaraghuli
- Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow G1 1XJ, UK; (M.M.A.Q.); (P.A.M.)
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, UK;
- EPSRC Future Manufacturing Research Hub for Continuous Manufacturing and Advanced Crystallisation (CMAC), University of Strathclyde, 99 George Street, Glasgow G1 1RD, UK
| | - Valerie A. Ferro
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, UK;
| | - Paul A. Mulheran
- Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow G1 1XJ, UK; (M.M.A.Q.); (P.A.M.)
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5
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Cao J, Shuai M, Shu Y, Wang J. A plasmon resonance-inspired discriminator unscrambles lipoprotein subtypes. Analyst 2022; 147:3035-3042. [DOI: 10.1039/d2an00550f] [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
The identification of lipoprotein subtypes and other proteins based on the PSS-AuNR plasmon resonance discriminator platform.
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Affiliation(s)
- Jianfang Cao
- Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Mingshu Shuai
- Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Yang Shu
- Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Jianhua Wang
- Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
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6
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Li X, Ma X, Zhang C, Xu R. A comparative study on the interaction of gold nanoparticles with trypsin and pepsin: thermodynamic perspectives. NEW J CHEM 2022. [DOI: 10.1039/d2nj04020d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The study provides accurate and full basic data for clarifying the interaction mechanism of AuNPs with trypsin and pepsin.
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Affiliation(s)
- Xiangrong Li
- Department of Medical Chemistry, Key Laboratory of Medical Molecular Probes, School of Basic Medicine, Xinxiang Medical University, 601 Jin-sui Road, Hong Qi District, Xinxiang, Henan, 453003, P. R. China
| | - Xiaoyi Ma
- Grade 2018, School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, 453003, P. R. China
| | - Congxiao Zhang
- Grade 2018, School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, 453003, P. R. China
| | - Ruonan Xu
- Department of Medical Chemistry, Key Laboratory of Medical Molecular Probes, School of Basic Medicine, Xinxiang Medical University, 601 Jin-sui Road, Hong Qi District, Xinxiang, Henan, 453003, P. R. China
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7
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Wang G, Wang W, Shangguan E, Gao S, Liu Y. Effects of gold nanoparticle morphologies on interactions with proteins. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 111:110830. [DOI: 10.1016/j.msec.2020.110830] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 02/01/2020] [Accepted: 03/09/2020] [Indexed: 02/09/2023]
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8
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Phue WH, Liu M, Xu K, Srinivasan D, Ismail A, George S. A Comparative Analysis of Different Grades of Silica Particles and Temperature Variants of Food-Grade Silica Nanoparticles for Their Physicochemical Properties and Effect on Trypsin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:12264-12272. [PMID: 31613615 DOI: 10.1021/acs.jafc.9b03638] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
While silica particles are used extensively in food products, different grades and temperature variants of silica particles have not been compared for their physiochemical and biological properties. Different grades of silica (food-grade nanoparticles (FG-NPs), nonfood-grade nanoparticles (NFG-NPs), and food-grade micron particles (FG-MPs)) and the temperature variants generated by exposing FG-NPs to wet heating, dry heating, and refrigeration were compared for their physicochemical properties and interaction with trypsin. FG-NPs were similar to NFG-NPs and FG-MPs in their elemental composition and amorphous nature but had relatively less branched and ring siloxane groups than the latter ones. There were subtle but noticeable changes in the agglomeration behavior and relative abundance of different silica groups in FG-NPs exposed to food-handling temperatures. Secondary structure and function of trypsin were negatively impacted by FG-NPs and their temperature variants. Silica particles showed a "mixed-type inhibition" of trypsin resulting in partial digestion of bovine serum albumin. In conclusion, our studies showed differences in the surface chemistry of different grades of silica particles and temperature variants of FG-NPs and their negative impact on the structure and function of trypsin.
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Affiliation(s)
- Wut H Phue
- Department of Food Science & Agricultural Chemistry , McGill University , 21111 Lakeshore Road , Sainte-Anne-de-Bellevue , QC H9X 3V9 , Canada
| | - Mengxi Liu
- Department of Food Science & Agricultural Chemistry , McGill University , 21111 Lakeshore Road , Sainte-Anne-de-Bellevue , QC H9X 3V9 , Canada
| | - Ke Xu
- Department of Food Science & Agricultural Chemistry , McGill University , 21111 Lakeshore Road , Sainte-Anne-de-Bellevue , QC H9X 3V9 , Canada
| | - Divya Srinivasan
- Department of Food Science & Agricultural Chemistry , McGill University , 21111 Lakeshore Road , Sainte-Anne-de-Bellevue , QC H9X 3V9 , Canada
| | - Ashraf Ismail
- Department of Food Science & Agricultural Chemistry , McGill University , 21111 Lakeshore Road , Sainte-Anne-de-Bellevue , QC H9X 3V9 , Canada
| | - Saji George
- Department of Food Science & Agricultural Chemistry , McGill University , 21111 Lakeshore Road , Sainte-Anne-de-Bellevue , QC H9X 3V9 , Canada
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9
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Tavanti F, Pedone A, Menziani MC. Multiscale Molecular Dynamics Simulation of Multiple Protein Adsorption on Gold Nanoparticles. Int J Mol Sci 2019; 20:ijms20143539. [PMID: 31331044 PMCID: PMC6678212 DOI: 10.3390/ijms20143539] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 07/11/2019] [Accepted: 07/17/2019] [Indexed: 01/06/2023] Open
Abstract
A multiscale molecular dynamics simulation study has been carried out in order to provide in-depth information on the adsorption of hemoglobin, myoglobin, and trypsin over citrate-capped AuNPs of 15 nm diameter. In particular, determinants for single proteins adsorption and simultaneous adsorption of the three types of proteins considered have been studied by Coarse-Grained and Meso-Scale molecular simulations, respectively. The results, discussed in the light of the controversial experimental data reported in the current experimental literature, have provided a detailed description of the (i) recognition process, (ii) number of proteins involved in the early stages of corona formation, (iii) protein competition for AuNP adsorption, (iv) interaction modalities between AuNP and protein binding sites, and (v) protein structural preservation and alteration.
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Affiliation(s)
- Francesco Tavanti
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125, Modena, Italy
| | - Alfonso Pedone
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125, Modena, Italy
| | - Maria Cristina Menziani
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125, Modena, Italy.
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10
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Lv X, Huang B, Zhu X, Jiang Y, Chen B, Tao Y, Zhou J, Cai Z. Mechanisms underlying the acute toxicity of fullerene to Daphnia magna: Energy acquisition restriction and oxidative stress. WATER RESEARCH 2017; 123:696-703. [PMID: 28715779 DOI: 10.1016/j.watres.2017.07.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 07/10/2017] [Accepted: 07/11/2017] [Indexed: 06/07/2023]
Abstract
The toxicity of fullerene (C60) to Daphnia magna has been a subject with increasing concerns. Nevertheless, the underlying mechanisms are still poorly understood. In the present study, we evaluated various aspects of the toxicological impacts of C60 on daphnia. After a 72-h exposure, the 50% effective concentration of C60 was 14.9 mg/L for immobilization, and 16.3 mg/L for mortality. Daphnia exhibited a quick uptake of C60 with a body burden value of 413 μg/g in wet weight in the 1 mg/L C60 treatment group. Transmission electron microscopy observations revealed that C60 had mainly accumulated in the guts of organisms. The feeding rate, gut ultra-structural alterations, and digestive enzyme activities of daphnia in response to C60 treatment were evaluated. The results revealed a significant reduction in the digestion and filtration rates, as well as gut impairment and inhibition of digestive enzymes (cellulose, amylase, trypsin, and β-galactosidase) activity of C60 exposed daphnia. In addition, the changes in superoxide dismutase (SOD) and malondialdehyde (MDA) levels in daphnia under C60 exposures were also discovered. These results, for the first time, provide systematic evidence that C60 caused a restriction in energy acquisition and increased oxidative damage in daphnia, which might be related to the bioaccumulation of C60 and finally led to the immobility and mortality.
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Affiliation(s)
- Xiaohui Lv
- Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055, PR China; Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China
| | - Boming Huang
- Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China
| | - Xiaoshan Zhu
- Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China.
| | - Yuelu Jiang
- Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China
| | - Baiyang Chen
- Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055, PR China
| | - Yi Tao
- Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China
| | - Jin Zhou
- Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China
| | - Zhonghua Cai
- Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China
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11
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Use of protease inhibitory gold nanoparticles as a compatibility enhancer for Bt and deltamethrin: A novel approach for pest control. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2016. [DOI: 10.1016/j.bcab.2016.07.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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12
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Patil CD, Borase HP, Suryawanshi RK, Patil SV. Trypsin inactivation by latex fabricated gold nanoparticles: A new strategy towards insect control. Enzyme Microb Technol 2016; 92:18-25. [PMID: 27542740 DOI: 10.1016/j.enzmictec.2016.06.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 05/10/2016] [Accepted: 06/09/2016] [Indexed: 12/26/2022]
Abstract
Before applying nanotechnologies in biomedical and environmental areas it is advised to study interactions of nanoparticles and other nanomaterials with biomacromolecule present in living system. Moreover there is scarcity of reports on interactions between nanoparticles and biomaterials. In present report a rapid, ecofriendly method of fabricating stable gold nanoparticles (AuNPs) using latex of Jatropha curcas is reported for the first time. AuNPs found to have characteristic absorption maxima centered at 540nm, multiple irregular shapes with size range from 20 to 50nm and have crystalline nature. Latex fabricated AuNPs were found to inhibit catalytic potential of trypsin (a vital enzyme responsible for digestion, insecticide resistance and in several disease conditions). The interactions between AuNPs and trypsin were analyzed by UV-vis spectrophotometry and microwave plasma-atomic emission spectrometry which suggests formation of trypsin-AuNPs complex responsible for lowering catalytic activity of trypsin. Transmission electron microscopy, Fourier transform infrared spectroscopy and particle size distribution studies further confirm complex formation between trypsin and AuNPs. Diverse interactions of metal nanoparticles with proteins such as covalent interaction, electrostatic interactions and binding to SH group of amino acid may be the reasons behind inhibition of trypsin activity. In vivo studies on serum of several vectors and agriculturally important pests supported instrumental results on AuNPs induced trypsin inhibition. This work will bring a new research direction to explore eco-friendly nanoparticle in insect control via inhibition of enzyme catalytic potential.
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Affiliation(s)
- Chandrashekhar D Patil
- School of Life Sciences, North Maharashtra University, Post Box 80, Jalgaon, 425001, Maharashtra, India
| | - Hemant P Borase
- School of Life Sciences, North Maharashtra University, Post Box 80, Jalgaon, 425001, Maharashtra, India
| | - Rahul K Suryawanshi
- School of Life Sciences, North Maharashtra University, Post Box 80, Jalgaon, 425001, Maharashtra, India
| | - Satish V Patil
- School of Life Sciences, North Maharashtra University, Post Box 80, Jalgaon, 425001, Maharashtra, India; North Maharashtra Microbial Culture Collection Centre (NMCC), North Maharashtra University, Post Box 80, Jalgaon, 425001, Maharashtra, India.
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13
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Tao X, Li C, Zhang B, He Y. Effects of aqueous stable fullerene nanocrystals (nC60) on the food conversion from Daphnia magna to Danio rerio in a simplified freshwater food chain. CHEMOSPHERE 2016; 145:157-162. [PMID: 26688252 DOI: 10.1016/j.chemosphere.2015.11.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 10/27/2015] [Accepted: 11/12/2015] [Indexed: 06/05/2023]
Abstract
Understanding the nanomaterial potential to the food conversion of two food chain levels is important in the ecosystem assessment as manufactured nanomaterials are being released into the environment. In this investigation, the food conversion from Daphnia magna (D. magna) (prey) to Danio rerio (D. rerio) (predator) was used as the study object of aqueous stable fullerene nanocrystals (nC60). Accumulated nC60 of D. magna was determined as the nominal initial exposure concentration for D. rerio. The results of 21-d dietary exposure experiment demonstrate that nC60 in D. magna decreased the body weight growths and condition factors of D. rerio, and reduced the food conversion ratio by 20% (from D. magna to D. rerio). Further, the experiments present that nC60 decrease three digestive enzymes activities of trypsinase, lipase, and amylase by 30, 29, and 55% in vivo, and by 60, 90, and 42% in vitro, respectively. Both in vivo and in vitro experiments indicated that nC60 was involved with the decrements of digestive enzymes activities. These decrements in digestive enzymes activities may be due to the deactivation caused by the adsorption of nC60 particles onto the surface or active center of digestive enzymes. Sum up, these results not only describe the nC60 deleterious effects on the food conversion from D. magna to D. rerio, but also provide some information regarding a probable food conversion inhibition mechanism of nC60.
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Affiliation(s)
- Xianji Tao
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China; School of Environmental Science and Technology, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Cuilan Li
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China
| | - Bo Zhang
- School of Environmental Science and Technology, Shanghai Jiao Tong University, Shanghai, 200240, China; NUS Environmental Research Institute, Singapore
| | - Yiliang He
- School of Environmental Science and Technology, Shanghai Jiao Tong University, Shanghai, 200240, China.
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14
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Dutta S, Saikia K, Nath P. Smartphone based LSPR sensing platform for bio-conjugation detection and quantification. RSC Adv 2016. [DOI: 10.1039/c6ra01113f] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Localized surface plasmon resonance based sensing and biosensing has been performed using the camera of a smartphone.
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Affiliation(s)
- Sibasish Dutta
- Applied Photonics and Nanophotonics Laboratory
- Department of Physics
- Tezpur University
- Assam
- India
| | - Koushik Saikia
- Advanced Functional Materials Laboratory
- Department of Physics
- Tezpur University
- Assam
- India
| | - Pabitra Nath
- Applied Photonics and Nanophotonics Laboratory
- Department of Physics
- Tezpur University
- Assam
- India
| |
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