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Zhu R, Qin F, Zheng X, Fang S, Ding J, Wang D, Liang L. Single-molecule lipopolysaccharides identification and the interplay with biomolecules via nanopore readout. Biosens Bioelectron 2023; 240:115641. [PMID: 37657310 DOI: 10.1016/j.bios.2023.115641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 09/03/2023]
Abstract
Lipopolysaccharides (LPS) are the major constituent on the cell envelope of all gram-negative bacteria. They are ubiquitous in air, and are toxic inflammatory stimulators for urinary disorders and sepsis. The reported optical, thermal, and electrochemical sensors via the intermolecular interplay of LPS with proteins and aptamers are generally complicated methods. We demonstrate the single-molecule nanopore approach for LPS identification in distinct bacteria as well as the serotypes discrimination. With a 4 nm nanopore, we achieve a detection limit of 10 ng/mL. Both the antibiotic polymyxin B (PMB) and DNA aptamer display specific binding to LPS. The identification of LPS in both human serum and tap water show good performance with nanopore platforms. Our work shows a highly-sensitive and easy-to-handle scheme for clinical and environmental biomarkers determination and provides a promising screening tool for early warning of contamination in water and medical supplies.
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Affiliation(s)
- Rui Zhu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences & Chongqing School, University of Chinese Academy of Science, Chongqing, 400714, PR China; Chongqing Jiaotong University, Chongqing, 400014, PR China
| | - Fupeng Qin
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences & Chongqing School, University of Chinese Academy of Science, Chongqing, 400714, PR China
| | - Xinchuan Zheng
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences & Chongqing School, University of Chinese Academy of Science, Chongqing, 400714, PR China
| | - Shaoxi Fang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences & Chongqing School, University of Chinese Academy of Science, Chongqing, 400714, PR China
| | - Jianjun Ding
- Southwest University, Chongqing, 400715, PR China
| | - Deqiang Wang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences & Chongqing School, University of Chinese Academy of Science, Chongqing, 400714, PR China.
| | - Liyuan Liang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences & Chongqing School, University of Chinese Academy of Science, Chongqing, 400714, PR China.
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Wang J, Peng C, Yang X, Ni M, Zhang X, Shi Z, Chen H, Liu S, Jin L, Zhao C. Lysozyme-Immobilized Polyethersulfone Membranes with Satisfactory Hemocompatibility and High Enzyme Activity for Endotoxin Removal. Biomacromolecules 2023; 24:4170-4179. [PMID: 37592721 DOI: 10.1021/acs.biomac.3c00502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
Endotoxin adsorption has received extensive attention in the field of blood purification. However, developing highly efficient endotoxin adsorbents with excellent hemocompatibility remains challenging. In this study, we propose a new approach for developing the functional polyethersulfone (PES) membrane to remove endotoxins. First, the PES polymer is grafted with polyethylene glycol methyl acrylate (PEG-MA) in a homogeneous phase system via γ irradiation, and PES-g-PEG can be directly used to prepare the membrane by the phase inversion method. Then, polydopamine (PDA) is coated as an adhesive layer onto a PES-g-PEG membrane in an alkaline aqueous solution, and lysozyme (Lyz) is covalently immobilized with PDA through the Schiff base reaction. Lysozyme acts as an affinity adsorption ligand of endotoxin through charge and hydrophobic action. Our study reveals that the PEG branched chain and the PDA coating on the PES membrane can maintain the secondary structure of lysozyme, and thus, the immobilized Lyz can maintain high activity. The adsorption capacity of endotoxins for the PES-g-PEG/PDA/Lyz membrane is 1.28 EU/mg, with an equilibrium adsorption time of 6 h. Therefore, the PES-g-PEG/PDA/Lyz membrane shows great potential application in the treatment of endotoxemia.
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Affiliation(s)
- Jingxia Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
- Radiation Chemistry Department, Sichuan Institute of Atomic Energy, Chengdu 610101, China
| | - Chaorong Peng
- Radiation Chemistry Department, Sichuan Institute of Atomic Energy, Chengdu 610101, China
- Irradiation Preservation Key Laboratory of Sichuan Province, Chengdu 610101, China
| | - Xijing Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
- Animal Experiment Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Maojun Ni
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Xiaobin Zhang
- Radiation Chemistry Department, Sichuan Institute of Atomic Energy, Chengdu 610101, China
| | - Zhenqiang Shi
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Hao Chen
- Radiation Chemistry Department, Sichuan Institute of Atomic Energy, Chengdu 610101, China
| | - Siyang Liu
- Radiation Chemistry Department, Sichuan Institute of Atomic Energy, Chengdu 610101, China
| | - Lunqiang Jin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Changsheng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
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3
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Comparison of the individual and combined actions of charged amino acids and glycine on the lysis of Escherichia coli cells by human and chicken lysozyme. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.12.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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4
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General characteristics of the influence of surfactants on the bacteriolytic activity of lysozyme based on the example of enzymatic lysis of Lactobacillus plantarum cells in the presence of Tween 21 and SDS. Biochem Biophys Res Commun 2021; 575:73-77. [PMID: 34461438 DOI: 10.1016/j.bbrc.2021.08.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 08/20/2021] [Indexed: 11/23/2022]
Abstract
The general characteristics of the effect of surfactants on the activity of lysozyme were demonstrated. The kinetics of bacterial cell lysis is consistent with the Michaelis-Menten equation and the presence of surfactants does not shift the pH-optimum of activity. Surfactants do not change the Km value but instead, affect the Vmax value. The experimental dependencies are well described by theoretical equations, which assume three surfactant binding sites on the lysozyme molecule. The dependencies of the activity of lysozyme on the surfactant concentration are either a step type (i.e., a higher plateau becomes a lower plateau), or a dependency with a maximum and continuation of the curve in the form of a plateau but with an increase in the surfactant concentration. It can be assumed that there is a mechanism for the regulation of lysozyme activity by an unknown natural factor that has a suitable hydrophobic radical capable of binding to the surface of lysozyme.
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5
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Yang Q, Li Y, Tuohuti P, Qin Z, Zhang Z, Zhao W, Su B. Advances in the Development of Biomaterials for Endotoxin Adsorption in Sepsis. Front Bioeng Biotechnol 2021; 9:699418. [PMID: 34395405 PMCID: PMC8361450 DOI: 10.3389/fbioe.2021.699418] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 06/29/2021] [Indexed: 02/05/2023] Open
Abstract
Sepsis, a life-threatening and intractable disease without any specific treatment, is activated by endotoxin. Some attempts at removing endotoxin to treat sepsis from the blood circulation using different hemoperfusion cartridges have been proposed recently, but they have failed to reduce the mortality of severe septic patients. This review summarizes the latest advances in the development of endotoxin adsorbents. In particular, we highlight two critical parameters for endotoxin adsorbents when they are applied in blood purification: the dissociation constant and the maximum adsorption capacity. We also discuss potential challenges and research directions for the future development of endotoxin adsorbents.
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Affiliation(s)
- Qinbo Yang
- Department of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Yupei Li
- Department of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China.,Disaster Medicine Center, Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu, China
| | | | - Zheng Qin
- Department of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Zhuyun Zhang
- Department of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Weifeng Zhao
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu, China.,Med-X Center for Materials, Sichuan University, Chengdu, China
| | - Baihai Su
- Department of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China.,Disaster Medicine Center, Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu, China.,West China School of Medicine, Sichuan University, Chengdu, China.,Med-X Center for Materials, Sichuan University, Chengdu, China.,The First People's Hospital of Shuangliu District, Chengdu, China
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Getsina M, P'yanova L, Kornienko N, Lavrenov A, Ershov A, Beloborodova N. Applicability of modified carbon sorbent for removing potentially toxic biologically active molecules of aromatic structure from blood plasma. Int J Artif Organs 2021; 44:930-937. [PMID: 34137293 DOI: 10.1177/03913988211018478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The modification of the mesoporous carbon sorbent with 3-phenylpropanoic acid was carried out in order to create preparations of complex, prolonged action, exhibiting detoxifying, antibacterial, and antifungal properties due to the applied modifier, which is capable of migrating into the solution and exhibiting its own biospecific properties. A technique was developed for fixing 3-phenylpropionic acid (PhPA) on a carbon support by its adsorption from solution. Three types of sorbents with various content of the modifier (PhPA) and the sorbent without modifier were studied. The sorption activity of new sorbents was studied using liquid-liquid extraction and gas chromatography-mass spectrometry methods on model experiments with plasma and aqueous additives of hydroxylated phenyl-containing acids (PhCAs) in various concentrations. The specific surface area was significantly changed for sorbent, modified with 1 × 10-3 mol/L of PhPA solution, and was 25% less than the area of unmodified sorbent. Potentially toxic biologically active hydroxylated PhCAs were used to create model solutions. The degrees of sorption of these compounds were close to 100%, except phenyllactic acid (over 80%). The sorbent without modifier and two sorbents with the lowest content of the modifier are considered to be more effective for the purification of the plasma from the hydroxylated PhCAs than the sorbent with the highest concentration of the modifier. Simultaneous adsorption of toxic metabolites from the bloodstream and desorption of beneficial ones can be used for a more subtle correction of the patient's condition.
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Affiliation(s)
- Maria Getsina
- Laboratory of Human Metabolism in Critical States, Negovsky Research Institute of General Reanimatology, Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, Moscow, Russian Federation
| | - Lidia P'yanova
- Center of New Chemical Technologies of the Federal Research Center Boreskov Institute of Catalysis of Siberian Branch of the Russian Academy of Sciences, Omsk, Russian Federation
| | - Natalia Kornienko
- Center of New Chemical Technologies of the Federal Research Center Boreskov Institute of Catalysis of Siberian Branch of the Russian Academy of Sciences, Omsk, Russian Federation
| | - Alexander Lavrenov
- Center of New Chemical Technologies of the Federal Research Center Boreskov Institute of Catalysis of Siberian Branch of the Russian Academy of Sciences, Omsk, Russian Federation
| | - Anton Ershov
- Laboratory of Human Metabolism in Critical States, Negovsky Research Institute of General Reanimatology, Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, Moscow, Russian Federation
| | - Natalia Beloborodova
- Laboratory of Human Metabolism in Critical States, Negovsky Research Institute of General Reanimatology, Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, Moscow, Russian Federation
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Levashov PA, Matolygina DA, Dmitrieva OA, Ovchinnikova ED, Adamova IY, Karelina NV, Nelyub VA, Eremeev NL, Levashov AV. Covalently immobilized chemically modified lysozyme as a sorbent for bacterial endotoxins (lipopolysaccharides). BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2019; 24:e00381. [PMID: 31692683 PMCID: PMC6806385 DOI: 10.1016/j.btre.2019.e00381] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 08/23/2019] [Accepted: 09/25/2019] [Indexed: 11/24/2022]
Abstract
Chemical modification of lysozyme was carried out using benzaldehyde and anisaldehyde. It was shown that chemical modification affects only 1-2 amino groups of the protein molecule which does not prevent further covalent immobilization of lysozyme using the remaining free amino groups. The bacteriolytic activity of lysozyme is preserved after chemical modification and after subsequent covalent immobilization. As a result of chemical modification immobilized lysozyme more effectively adsorbs bacterial lipopolysaccharides (endotoxins). Adsorption of immunoglobulin G does not increase after modification. The sorbents obtained in this work can be used for the future development of new medical material for the extracorporeal treatment of sepsis. The proposed scheme for the modification and immobilization of lysozyme can be used with various aldehydes for the preparation of sorbents with different properties.
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Affiliation(s)
- Pavel A. Levashov
- Department of Chemical Enzymology, Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow, Russia
- Interindustry Engineering Center for Composite Materials, N.E. Bauman Moscow State Technical University, Moscow, Russia
| | - Darya A. Matolygina
- Department of Chemical Enzymology, Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow, Russia
- Interindustry Engineering Center for Composite Materials, N.E. Bauman Moscow State Technical University, Moscow, Russia
| | - Oxana A. Dmitrieva
- Institute of Experimental Cardiology, National Medical Research Center of Cardiology, Moscow, Russia
| | - Ekaterina D. Ovchinnikova
- Institute of Experimental Cardiology, National Medical Research Center of Cardiology, Moscow, Russia
| | - Irina Yu. Adamova
- Institute of Experimental Cardiology, National Medical Research Center of Cardiology, Moscow, Russia
- POKARD Ltd, Moscow, Russia
| | - Nataliya V. Karelina
- Interindustry Engineering Center for Composite Materials, N.E. Bauman Moscow State Technical University, Moscow, Russia
| | - Vladimir A. Nelyub
- Interindustry Engineering Center for Composite Materials, N.E. Bauman Moscow State Technical University, Moscow, Russia
| | - Nikolay L. Eremeev
- Department of Chemical Enzymology, Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Andrey V. Levashov
- Department of Chemical Enzymology, Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow, Russia
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