1
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Hu M, Liu Z, Shen Z. Gel-to-Solution Transition of Sulfhydryl Self-Assembled Peptide Hydrogels Undergoing Oxidative Modulation. ACS APPLIED BIO MATERIALS 2023; 6:5836-5841. [PMID: 38018082 DOI: 10.1021/acsabm.3c00932] [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] [Indexed: 11/30/2023]
Abstract
The design of self-assembling biomaterials needs to take into consideration the timing and location of the self-assembly process. In recent decades, the principal strategy has been to control the peptide self-assembly under specific conditions to enable its functional performance. However, few studies have explored the responsive elimination of functional self-assembled peptide hydrogels after their function has been performed. We designed peptide ECAFF (ECF-5), which under reductive conditions can self-assemble into a hydrogel. Upon exposure to oxidizing conditions, disulfide bonds form between the peptides, altering their molecular structure and impacting their self-assembly capability. As a result, the peptide hydrogels transition to a soluble state. This study investigates the utilization of oxidation to induce a gel-to-solution transition in peptide hydrogels and provides an explanation for their degradation following free radical treatment. Self-assembled peptide hydrogel materials can be designed from a fresh perspective by considering the degradation that takes place after functional execution.
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Affiliation(s)
- Mai Hu
- The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang 330088, P. R. China
| | - Zhengli Liu
- School of Pharmaceutical Sciences, Chongqing University, Chongqing 400044, China
| | - Zhiwei Shen
- The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang 330088, P. R. China
- Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing 400014, China
- Zhongyuan Huiji Biotechnology Co., Ltd., Chongqing 400039, China
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2
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Liu Y, Li K, Tian J, Gao A, Tian L, Su H, Miao S, Tao F, Ren H, Yang Q, Cao J, Yang P. Synthesis of robust underwater glues from common proteins via unfolding-aggregating strategy. Nat Commun 2023; 14:5145. [PMID: 37620335 PMCID: PMC10449925 DOI: 10.1038/s41467-023-40856-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 08/14/2023] [Indexed: 08/26/2023] Open
Abstract
Underwater adhesive proteins secreted by organisms greatly inspires the development of underwater glue. However, except for specific proteins such as mussel adhesive protein, barnacle cement proteins, curli protein and their related recombinant proteins, it is believed that abundant common proteins cannot be converted into underwater glue. Here, we demonstrate that unfolded common proteins exhibit high affinity to surfaces and strong internal cohesion via amyloid-like aggregation in water. Using bovine serum albumin (BSA) as a model protein, we obtain a stable unfolded protein by cleaving the disulfide bonds and maintaining the unfolded state by means of stabilizing agents such as trifluoroethanol (TFE) and urea. The diffusion of stabilizing agents into water exposes the hydrophobic residues of an unfolded protein and initiates aggregation of the unfolded protein into a solid block. A robust and stable underwater glue can thus be prepared from tens of common proteins. This strategy deciphers a general code in common proteins to construct robust underwater glue from abundant biomass.
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Affiliation(s)
- Yongchun Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Ke Li
- Xi'an Key Laboratory for Prevention and Treatment of Common Aging Diseases, Translational and Research Centre for Prevention and Therapy of Chronic Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, 710021, China
| | - Juanhua Tian
- Department of Urology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, China
| | - Aiting Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Lihua Tian
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Hao Su
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Shuting Miao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Fei Tao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Hao Ren
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Qingmin Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Jing Cao
- Key Laboratory of Archaeological Exploration and Cultural Heritage Conservation Technology, Ministry of Education, Institute of Culture and Heritage, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Peng Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China.
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3
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Hauptmann A, Hoelzl G, Mueller M, Bechtold-Peters K, Loerting T. Raman Marker Bands for Secondary Structure Changes of Frozen Therapeutic Monoclonal Antibody Formulations During Thawing. J Pharm Sci 2023; 112:51-60. [PMID: 36279956 DOI: 10.1016/j.xphs.2022.10.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 10/16/2022] [Accepted: 10/16/2022] [Indexed: 11/06/2022]
Abstract
In this work we use Raman spectroscopy for protein characterization in the frozen state. We investigate the behavior of frozen therapeutic monoclonal antibody IgG1 formulation upon thawing by Raman spectroscopy. Secondary and tertiary structure of the protein in three different mab formulations in the frozen state are followed through observation of marker bands for α-helix, β-sheet and random coil. We identify the tyrosine intensity ratio I856/I830 as a marker for mab aggregation. Upon fast cooling (40 °C/min) to -80 °C we observe a significant increase of random coil and α -helical structures, while this is not the case for slower cooling (20 °C/min) to -80 °C. Most changes in the protein's secondary structure are observed in the course of thawing in the range up to -20 °C, when passing through the glass transitions and cold-crystallization of the two types of freeze-concentrated solutions formed through macro- and microcryoconcentration. An increase of protein concentration and the addition of mannitol suppress secondary structural changes but do no impact on aggregation.
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Affiliation(s)
| | | | | | | | - Thomas Loerting
- Institute of Physical Chemistry, University Innsbruck, Innsbruck, Austria.
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4
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Shi Y, Tian H, Xia Y, Sun Y, Zhou Z, Ren Y, Shi T, Liu Z, Ma G. Deciphering the reaction mechanism and the reactivity of the TCEP species towards reduction of hexachloroiridate(IV). J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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5
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Torres-Huerta AL, Antonio-Pérez A, García-Huante Y, Alcázar-Ramírez NJ, Rueda-Silva JC. Biomolecule-Based Optical Metamaterials: Design and Applications. BIOSENSORS 2022; 12:962. [PMID: 36354471 PMCID: PMC9688573 DOI: 10.3390/bios12110962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/21/2022] [Accepted: 10/22/2022] [Indexed: 06/16/2023]
Abstract
Metamaterials are broadly defined as artificial, electromagnetically homogeneous structures that exhibit unusual physical properties that are not present in nature. They possess extraordinary capabilities to bend electromagnetic waves. Their size, shape and composition can be engineered to modify their characteristics, such as iridescence, color shift, absorbance at different wavelengths, etc., and harness them as biosensors. Metamaterial construction from biological sources such as carbohydrates, proteins and nucleic acids represents a low-cost alternative, rendering high quantities and yields. In addition, the malleability of these biomaterials makes it possible to fabricate an endless number of structured materials such as composited nanoparticles, biofilms, nanofibers, quantum dots, and many others, with very specific, invaluable and tremendously useful optical characteristics. The intrinsic characteristics observed in biomaterials make them suitable for biomedical applications. This review addresses the optical characteristics of metamaterials obtained from the major macromolecules found in nature: carbohydrates, proteins and DNA, highlighting their biosensor field use, and pointing out their physical properties and production paths.
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Affiliation(s)
- Ana Laura Torres-Huerta
- Escuela de Ingeniería y Ciencias, Tecnológico de Monterrey, Campus Estado de México, Av. Lago de Guadalupe KM 3.5, Margarita Maza de Juárez, Cd. López Mateos, Atizapán de Zaragoza 52926, Mexico
| | - Aurora Antonio-Pérez
- Escuela de Ingeniería y Ciencias, Tecnológico de Monterrey, Campus Estado de México, Av. Lago de Guadalupe KM 3.5, Margarita Maza de Juárez, Cd. López Mateos, Atizapán de Zaragoza 52926, Mexico
| | - Yolanda García-Huante
- Departamento de Ciencias Básicas, Unidad Profesional Interdisciplinaria en Ingeniería y Tecnologías Avanzadas, Instituto Politécnico Nacional (UPIITA-IPN), Mexico City 07340, Mexico
| | - Nayelhi Julieta Alcázar-Ramírez
- Escuela de Ingeniería y Ciencias, Tecnológico de Monterrey, Campus Estado de México, Av. Lago de Guadalupe KM 3.5, Margarita Maza de Juárez, Cd. López Mateos, Atizapán de Zaragoza 52926, Mexico
| | - Juan Carlos Rueda-Silva
- Escuela de Ingeniería y Ciencias, Tecnológico de Monterrey, Campus Estado de México, Av. Lago de Guadalupe KM 3.5, Margarita Maza de Juárez, Cd. López Mateos, Atizapán de Zaragoza 52926, Mexico
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK
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Chen J, Xu M, Wang L, Li T, Li Z, Wang T, Li P. Converting lysozyme to hydrogel: A multifunctional wound dressing that is more than antibacterial. Colloids Surf B Biointerfaces 2022; 219:112854. [PMID: 36154996 DOI: 10.1016/j.colsurfb.2022.112854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 08/27/2022] [Accepted: 09/13/2022] [Indexed: 11/19/2022]
Abstract
Wounds are usually irregular in shapes, and accompanied with a series of disorders such as hemorrhage and bacteria contamination. Here, we report a multifunctional hydrogel prepared by phase-transited lysozyme (PTL), which presents antimicrobial, injectable, self-healing, tissue adhesive, hemostatic and biodegradable properties that fit the requirements of wound treatment. The lysozyme was unfolded under the action of tris(2-carboxyethyl)phosphine (TCEP), and then self-assembled into a hydrogel (PTLG). The phase transition expanded the antibacterial spectrum of lysozyme, PTLG effectively killed both Gram-positive bacteria (Staphylococcus aureus, Staphylococcus epidermidis) and Gram-negative bacteria (Escherichia coli, Acinetobacter baumannii) on contact. This dynamically cross-linked hydrogel exhibited injectable and self-healing abilities, and was capable of adapting to various wound morphologies. The tissue-adhesive nature derived from phase-transition, endowed PTLG with hemostatic effect. Meanwhile, PTLG exhibited biocompatibility towards mammalian cells. Furthermore, its anti-infective ability in vivo was verified in a mouse subcutaneous infection model, more than 98 % of S. epidermidis was reduced under PTLG injection. And PTLG could be biodegraded within four weeks in mice body. Overall, the proposed PTLG is a promising multifunctional dressing material that could accommodate the various demands of complex and deep wounds.
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Affiliation(s)
- Jingjie Chen
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) & Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, PR China
| | - Miao Xu
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) & Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, PR China; Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 211816, PR China
| | - Lei Wang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) & Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, PR China
| | - Tian Li
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) & Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, PR China
| | - Ziyue Li
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) & Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, PR China; Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 211816, PR China
| | - Tengjiao Wang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) & Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, PR China
| | - Peng Li
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) & Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, PR China; Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 211816, PR China.
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7
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Wu L, Cheng L, Yang J, Yan Y, Zhang E, Kochovski Z, Li L, Wang Z, Deng L, Lu Y, Besenius P, Cui W, Chen G. Construction of Active Protein Materials: Manipulation on Morphology of Salmon Calcitonin Assemblies with Enhanced Bone Regeneration Effect. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2207526. [PMID: 36103707 DOI: 10.1002/adma.202207526] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Indexed: 06/15/2023]
Abstract
The effect of protein drugs is always limited by their relatively low stability and fast degradation property; thus, various elegant efforts have been made to improve the bioactivity and biocompatibility of the protein drugs. Here, an alternative way is proposed to solve this problem. By simply adding a limited amount of small-molecular regulator, which tunes the subtle balance of protein-protein interactions (PPIs) and disulfide bond formation, the self-assembly property of the protein drug can be regulated, forming an "active protein material" itself. This means that, the resulting biomaterial is dominated by the protein drug and water, with significantly enhanced bone regeneration effect compared to the virgin protein in vitro and in vivo, through multivalent effect between the protein and receptor and the retarded degradation of the assembled proteins. In this active protein material, the protein drug is not only the active drug, but also the drug carrier, which greatly increases the drug-loading efficiency of the biomaterial, indicating the advantages of the easy preparation, high efficiency, and low cost of the active protein material with a bright future in biomedical applications.
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Affiliation(s)
- Libin Wu
- The State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China
| | - Liang Cheng
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Jing Yang
- The State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China
| | - Yufei Yan
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Ensong Zhang
- The State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China
| | - Zdravko Kochovski
- Institute of Chemistry, University of Potsdam, 14476, Potsdam, Germany
- Institute of Electrochemical Energy Storage, Helmholtz-Zentrum Berlin für Materialien und Energie, 14109, Berlin, Germany
| | - Long Li
- The State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China
| | - Zhen Wang
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Lianfu Deng
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Yan Lu
- Institute of Chemistry, University of Potsdam, 14476, Potsdam, Germany
- Institute of Electrochemical Energy Storage, Helmholtz-Zentrum Berlin für Materialien und Energie, 14109, Berlin, Germany
| | - Pol Besenius
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Wenguo Cui
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Guosong Chen
- The State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China
- Multiscale Research Institute of Complex Systems, Fudan University, Shanghai, 200433, P. R. China
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8
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Quiñones-Ruiz T, Rosario-Alomar MF, Shanmugasundaram M, Ali MM, Lednev IK. Spontaneous Refolding of Amyloid Fibrils from One Polymorph to Another Caused by Changes in Environmental Hydrophobicity. Biochemistry 2022; 61:1456-1464. [PMID: 35786852 DOI: 10.1021/acs.biochem.2c00143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Here, we report a new phenomenon in which lysozyme fibrils formed in a solution of acetic acid spontaneously refold to a different polymorph through a disassembled intermediate upon the removal of acetic acid. The structural changes were revealed and characterized by deep-UV resonance Raman spectroscopy, nonresonance Raman spectroscopy, intrinsic tryptophan fluorescence spectroscopy, and atomic force microscopy. A PPII-like structure with highly solvent-exposed tryptophan residues predominates the intermediate aggregates before refolding to polymorph II fibrils. Furthermore, the disulfide (SS) bonds undergo significant rearrangements upon the removal of acetic acid from the lysozyme fibril environment. The main SS bond conformation changes from gauche-gauche-trans in polymorph I to gauche-gauche-gauche in polymorph II. Changing the hydrophobicity of the fibril environment was concluded to be the decisive factor causing the spontaneous refolding of lysozyme fibrils from one polymorph to another upon the removal of acetic acid. Potential biological implications of the discovered phenomenon are discussed.
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Affiliation(s)
- Tatiana Quiñones-Ruiz
- Department of Chemistry, University at Albany, SUNY, Albany, New York 12222, United States
| | | | | | - Muhammad M Ali
- Department of Chemistry, University at Albany, SUNY, Albany, New York 12222, United States
| | - Igor K Lednev
- Department of Chemistry, University at Albany, SUNY, Albany, New York 12222, United States
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9
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Measurement of Secondary Structure Changes in Poly-L-lysine and Lysozyme during Acoustically Levitated Single Droplet Drying Experiments by In Situ Raman Spectroscopy. SENSORS 2022; 22:s22031111. [PMID: 35161856 PMCID: PMC8839924 DOI: 10.3390/s22031111] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 01/27/2022] [Accepted: 01/28/2022] [Indexed: 02/01/2023]
Abstract
Drying processes such as spray drying, as commonly used in the pharmaceutical industry to convert protein-based drugs into their particulate form, can lead to an irreversible loss of protein activity caused by protein secondary structure changes. Due to the nature of these processes (high droplet number, short drying time), an in situ investigation of the structural changes occurring during a real drying process is hardly possible. Therefore, an approach for the in situ investigation of the expected secondary structural changes during single droplet protein drying in an acoustic levitator by time-resolved Raman spectroscopy was developed and is demonstrated in this paper. For that purpose, a self-developed NIR–Raman sensor generates and detects the Raman signal from the levitated solution droplet. A mathematical spectral reconstruction by multiple Voigt functions is used to quantify the relative secondary structure changes occurring during the drying process. With the developed setup, it was possible to detect and quantify the relative secondary structure changes occurring during single droplet drying experiments for the two chosen model substances: poly-L-lysine, a homopolypeptide widely used as a protein mimic, and lysozyme. Throughout drying, an increase in the β-sheet structure and a decrease in the other two structural elements, α-helix, and random coil, could be identified. In addition, it was observed that the degree of structural changes increased with increasing temperature.
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Chen M, Yang F, Chen X, Qin R, Pi H, Zhou G, Yang P. Crack Suppression in Conductive Film by Amyloid-Like Protein Aggregation toward Flexible Device. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2104187. [PMID: 34510560 DOI: 10.1002/adma.202104187] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 07/28/2021] [Indexed: 06/13/2023]
Abstract
A fatal weakness in flexible electronics is the mechanical fracture that occurs during repetitive fatigue deformation; thus, controlling the crack development of the conductive layer is of prime importance and has remained a great challenge until now. Herein, this issue is tackled by utilizing an amyloid/polysaccharide molecular composite as an interfacial binder. Sodium alginate (SA) can take part in amyloid-like aggregation of the lysozyme, leading to the facile synthesis of a 2D protein/saccharide hybrid nanofilm over an ultralarge area (e.g., >400 cm2 ). The introduction of SA into amyloid-like aggregates significantly enhances the mechanical strength of the hybrid nanofilm, which, with the help of amyloid-mediated interfacial adhesion, effectively diminishes the microcracks in the hybrid nanofilm coating after repetitive bending or stretching. The microcrack-free hybrid nanofilm then shows high interfacial activity to induce electroless deposition of metal in a Kelvin model on a substrate, which noticeably suppresses the formation of microcracks and consequent conductivity loss during the bending and stretching of the metal-coated flexible substrates. This work underlines the significance of amyloid/polysaccharide nanocomposites in the design of interfacial binders for reliable flexible electronic devices and represents an important contribution to mimicking amyloid and polysaccharide-based adhesive cements created by organisms.
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Affiliation(s)
- Mengmeng Chen
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Facui Yang
- School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an, 710021, China
| | - Xi Chen
- School of Chemistry, Xi'an Jiaotong University, Xi'an, 710119, China
| | - Rongrong Qin
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Hemu Pi
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Guijiang Zhou
- School of Chemistry, Xi'an Jiaotong University, Xi'an, 710119, China
| | - Peng Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
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11
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Zhang Y, Zhang N, Wang Q, Wang P, Yu Y. A facile and eco-friendly approach for preparation of microkeratin and nanokeratin by ultrasound-assisted enzymatic hydrolysis. ULTRASONICS SONOCHEMISTRY 2020; 68:105201. [PMID: 32521486 DOI: 10.1016/j.ultsonch.2020.105201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 05/08/2020] [Accepted: 05/29/2020] [Indexed: 06/11/2023]
Abstract
Protein is one of the most abundant natural polymeric materials, but only a few studies on nanoproteins have been conducted. In this paper, a novel approach based on ultrasound-assisted enzymatic hydrolysis was employed for the preparation of microkeratin and nanokeratin from wool. The hydrolysis system included a solution containing enzyme (esperase) and reductant (L-cysteine) and treated ultrasonically to remove the scales and amorphous regions within wool. Results showed that the reaction was most effective at 50 °C and pH 7, when incubated for 3 h, followed by sonication for 6 h. The products included spindle-shaped microkeratin (4-7 μm in diameter and 70-120 μm in length) and cone-shaped nanokeratin (50-300 nm in diameter and less than 15 μm in length). Under ultrasonic-assisted conditions, the yields of microkeratin and nanokeratin increased significantly, while the treatment time decreased. Fourier transform infrared spectroscopy (FTIR) showed that the chemical structures of microkeratin and nanokeratin did not change, compared to that of wool. X-ray diffraction (XRD) analysis showed that the microkeratin was mainly composed of α-helical structure, while the β-sheet structure was more prevalent in nanokeratin. The presented method is facile and eco-friendly, thereby paving new pathways for the preparation of microkeratin and nanokeratin.
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Affiliation(s)
- Yipeng Zhang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Ave, Wuxi, Jiangsu, 214122, China
| | - Nan Zhang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Ave, Wuxi, Jiangsu, 214122, China
| | - Qiang Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Ave, Wuxi, Jiangsu, 214122, China.
| | - Ping Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Ave, Wuxi, Jiangsu, 214122, China
| | - Yuanyuan Yu
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Ave, Wuxi, Jiangsu, 214122, China
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12
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Wholey WY, Mueller JL, Tan C, Brooks JF, Zikherman J, Cheng W. Synthetic Liposomal Mimics of Biological Viruses for the Study of Immune Responses to Infection and Vaccination. Bioconjug Chem 2020; 31:685-697. [PMID: 31940172 DOI: 10.1021/acs.bioconjchem.9b00825] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Human viruses possess very complex supramolecular structures. Both icosahedral and enveloped viruses typically display an array of viral-encoded protein antigens at varied spatial densities on the viral particle surface. The viral nucleic acid genome, on the other hand, is encapsulated inside the viral particle. Although both the surface antigen and the interior nucleic acids could independently produce immunological responses, how B cells integrate these two types of signals and respond to a typical virus particle to initiate activation is not well understood at a molecular level. The study of these fundamental biological processes would benefit from the development of viral structural mimics that are well constructed to incorporate both quantitative and qualitative viral features for presentation to B cells. These novel tools would enable researchers to systematically dissect the underlying processes. Here we report the development of such particulate antigens based on liposomes engineered to display a model protein antigen, hen egg lysozyme (HEL). We developed methods to overexpress and purify various affinity mutants of HEL from E. coli. We conjugated the purified recombinant HEL proteins onto the surface of a virion-sized liposome in an orientation-specific manner at defined spatial densities and also encapsulated nucleic acid molecules into the interior of the liposome. Both the chemical conjugation of the HEL antigen on liposome surfaces and the encapsulation of nucleic acids were stable under physiologically relevant conditions. These liposomes elicited antigen-specific B-cell responses in vitro, which validate these supramolecular structures as a novel and effective approach to mimic and systematically isolate the role of essential viral features in directing the B-cell response to particulate antigens.
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Affiliation(s)
- Wei-Yun Wholey
- Department of Pharmaceutical Sciences, University of Michigan, 428 Church Street, Ann Arbor, Michigan 48109, United States
| | - James L Mueller
- Division of Rheumatology, Rosalind Russell and Ephraim P. Engleman Arthritis Research Center, Department of Medicine, University of California, San Francisco, California 94143, United States
| | - Corey Tan
- Division of Rheumatology, Rosalind Russell and Ephraim P. Engleman Arthritis Research Center, Department of Medicine, University of California, San Francisco, California 94143, United States
| | - Jeremy F Brooks
- Division of Rheumatology, Rosalind Russell and Ephraim P. Engleman Arthritis Research Center, Department of Medicine, University of California, San Francisco, California 94143, United States
| | - Julie Zikherman
- Division of Rheumatology, Rosalind Russell and Ephraim P. Engleman Arthritis Research Center, Department of Medicine, University of California, San Francisco, California 94143, United States
| | - Wei Cheng
- Department of Pharmaceutical Sciences, University of Michigan, 428 Church Street, Ann Arbor, Michigan 48109, United States.,Department of Biological Chemistry, University of Michigan Medical School, 1150 West Medical Center Drive, Ann Arbor, Michigan 48109, United States
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13
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Wang X, Zhang H, Yang B, Wang L, Sun H. A colorless, transparent and self-healing polyurethane elastomer modulated by dynamic disulfide and hydrogen bonds. NEW J CHEM 2020. [DOI: 10.1039/c9nj06457e] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A self-healing PU elastomer modulated by disulfide and hydrogen bonding with high transparency of 97% was reported.
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Affiliation(s)
- Xue Wang
- School of Materials Science and Mechanical Engineering
- Beijing Technology and Business University
- Beijing 100048
- People's Republic of China
| | - Huijuan Zhang
- School of Materials Science and Mechanical Engineering
- Beijing Technology and Business University
- Beijing 100048
- People's Republic of China
| | - Biao Yang
- School of Materials Science and Mechanical Engineering
- Beijing Technology and Business University
- Beijing 100048
- People's Republic of China
| | - Liguo Wang
- Key Laboratory for Green Process and Engineering
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology
- Institute of Process and Engineering
- Chinese Academy of Sciences
- Beijing 100190
| | - Hui Sun
- School of Materials Science and Mechanical Engineering
- Beijing Technology and Business University
- Beijing 100048
- People's Republic of China
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14
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Saif B, Zhang W, Zhang X, Gu Q, Yang P. Sn-Triggered Two-Dimensional Fast Protein Assembly with Emergent Functions. ACS NANO 2019; 13:7736-7749. [PMID: 31244042 DOI: 10.1021/acsnano.9b01392] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The discovery of a general strategy for organizing functional proteins into stable nanostructures with the desired dimension, shape, and function is an important focus in developing protein-based self-assembled materials, but the scalable synthesis of such materials and transfer to other substrates remain great challenges. We herein tackle this issue by creating a two-dimensional metal-protein hybrid nanofilm that is flexible and cost-effective with reliable self-recovery, stability, and multifunctionality. As it differs from traditional metal ions, we discover the capability of Sn2+ to initiate fast amyloid-like protein assembly (occurring in seconds) by effectively reducing the disulfide bonds of native globular proteins. The Sn2+-initiated lysozyme aggregation at the air/water interface leads to droplet flattening, a result never before reported in a protein system, which finally affords a multifunctional 2D Sn-doped hybrid lysozyme nanofilm with an ultralarge area (e.g., 0.2 m2) within a few minutes. The hybrid film is distinctive in its ease of coating on versatile material surfaces with endurable chemical and mechanical stability, optical transparency, and diverse end uses in antimicrobial and photo-/electrocatalytic scaffolds. Our approach provides not only insights into the effect of tin ions on macroscopic self-assembly of proteins but also a controllable and scalable synthesis of a potential biomimic framework for biomedical and biocatalytic applications.
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Affiliation(s)
- Bassam Saif
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710062 , P.R. China
| | - Wenxin Zhang
- School and Hospital of Stomatology , Tianjin Medical University , 12 Observatory Road , Tianjin 30070 , P.R. China
| | - Xu Zhang
- School and Hospital of Stomatology , Tianjin Medical University , 12 Observatory Road , Tianjin 30070 , P.R. China
| | - Quan Gu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710062 , P.R. China
| | - Peng Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710062 , P.R. China
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15
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Tao F, Han Q, Yang P. Developing Biopolymer Mesocrystals by Crystallization of Secondary Structures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:183-193. [PMID: 30554509 DOI: 10.1021/acs.langmuir.8b03300] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Particle-based mesocrystals have been known for over 10 years; however, examples of biopolymer mesocrystals are rather scarce. The synthesis of particle precursors of biopolymers, the identification of particle-mediated crystallization processes, and thus the synthesis of mesocrystals of biopolymers are challenging. Here, we summarize the existing examples of biopolymer crystallization based on self-assembly of the secondary structures, which could induce the formation of biopolymer mesocrystals. As basic building units, simple secondary structures such as β-sheets or α-helixes could provide a useful tool for the design of biopolymer mesocrystals.
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Affiliation(s)
- Fei Tao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China
| | - Qian Han
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China
| | - Peng Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China
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16
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Kumari A, Ahmad B. The physical basis of fabrication of amyloid-based hydrogels by lysozyme. RSC Adv 2019; 9:37424-37435. [PMID: 35542254 PMCID: PMC9075597 DOI: 10.1039/c9ra07179b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 11/01/2019] [Indexed: 11/21/2022] Open
Abstract
Schematic of heating- and cooling-induced transitions between HEWL states, and the subsequent formation of the hydrogel.
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Affiliation(s)
- Anumita Kumari
- School of Chemical Sciences
- UM-DAE Centre for Excellence in Basic Sciences
- University of Mumbai
- Mumbai-400098
- India
| | - Basir Ahmad
- Protein Assembly Laboratory
- JH-Institute of Molecular Medicine
- Jamia Hamdard
- New Delhi-110062
- India
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17
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Cabello G, Nwoko KC, Mingarelli M, McLaughlin AC, Trembleau L, Feldmann J, Cuesta A, Smith TA. Physicochemical Tools: Toward a Detailed Understanding of the Architecture of Targeted Radiotherapy Nanoparticles. ACS APPLIED BIO MATERIALS 2018; 1:1639-1646. [DOI: 10.1021/acsabm.8b00476] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Gema Cabello
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
| | - Kenneth C. Nwoko
- Department of Chemistry, School of Natural and Computing Sciences, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
| | - Marco Mingarelli
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
| | - Abbie C. McLaughlin
- Department of Chemistry, School of Natural and Computing Sciences, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
| | - Laurent Trembleau
- Department of Chemistry, School of Natural and Computing Sciences, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
| | - Joerg Feldmann
- Department of Chemistry, School of Natural and Computing Sciences, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
| | - Angel Cuesta
- Department of Chemistry, School of Natural and Computing Sciences, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
| | - Tim A.D. Smith
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
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18
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Santos RM, Kessler JM, Salou P, Menezes JC, Peinado A. Monitoring mAb cultivations with in-situ raman spectroscopy: The influence of spectral selectivity on calibration models and industrial use as reliable PAT tool. Biotechnol Prog 2018; 34:659-670. [PMID: 29603907 DOI: 10.1002/btpr.2635] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 03/19/2018] [Indexed: 11/08/2022]
Abstract
Raman spectroscopy is a suitable monitoring technique for CHO cultivations. However, a thorough discussion of peaks, bands, and region assignments to key metabolites and culture attributes, and the interpretability of produced calibrations is scarce. That understanding is vital for the long-term predictive ability of monitoring models, and to facilitate lifecycle management that comply with regulatory guidelines. Several fed-batch lab-scale mAb mammalian cultivations were carried out, with in situ Raman spectroscopy used for process state estimation and attribute monitoring. The goal was to evaluate its use as a process analytical technology (PAT) tool to detect residual glucose and lactate levels, understand their dynamics and interconversion, and eventually estimate key performance culture and product quality attributes. Glucose and lactate models were optimized up to 0.31 g L-1 with 3 Latent Variables (LVs) and 0.19 g L-1 (2 LVs) accuracy, respectively. Glutamine and product titer models, were not specific and accurate enough, even though indirect calibrations were obtained with a RMSEP of 0.12 g L-1 (4 LVs) and 0.29 g L-1 (5 LVs), respectively. A critical discussion and details about the extensive work done in calibration development and optimization are provided. Namely, considering a risk-based selection of variability sources impacting sample spectra, executing designed experiments with spiked cultivations, and using advanced chemometric procedures for variable selection and model cross validation. A strategy is presented to evaluation Raman spectroscopy as a reliable PAT technology fit-for industrial use. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 34:659-670, 2018.
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Affiliation(s)
- Rafael M Santos
- Institute for Biotechnology and Biosciences, Dept. BioEngineering IST, University of Lisbon, Av. Rovisco Pais 1, Lisbon, 1049-001, Portugal
| | | | - Patrick Salou
- Novartis AG, Biologics, Basel, Basel-Stadt, CH 4002, Switzerland
| | - Jose C Menezes
- Institute for Biotechnology and Biosciences, Dept. BioEngineering IST, University of Lisbon, Av. Rovisco Pais 1, Lisbon, 1049-001, Portugal
| | - Antonio Peinado
- Novartis AG, MS&T, Klybeckstrasse 191, Basel, Basel-Stadt, CH 4002, Switzerland
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19
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Wang X, Li J, Yan Q, Chen Y, Fan A, Wang Z, Zhao Y. In Situ Probing Intracellular Drug Release from Redox-Responsive Micelles by United FRET and AIE. Macromol Biosci 2018; 18. [PMID: 29360270 DOI: 10.1002/mabi.201700339] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 12/15/2017] [Indexed: 12/23/2022]
Abstract
Redox-responsive micelles are versatile nanoplatforms for on-demand drug delivery, but the in situ evaluation of drug release is challenging. Fluorescence resonance energy transfer (FRET) technique shows potential for addressing this, while the aggregation-caused quenching effect limits the assay sensitivity. The aim of the current work is to combine aggregation-induced emission (AIE) probe with FRET to realize drug release assessment from micelles. Tetraphenylethene (TPE) is selected as AIE dye and curcumin (Cur) is chosen as the model drug as well as FRET receptor. The drug is covalently linked to a block copolymer via the disulfide bond linker and TPE is also chemically linked to the polymer via an amide bond; the obtained amphiphilic polymer conjugate self-assembles into micelles with a hydrodynamic size of ≈125 nm. Upon the supplement of glutathione or tris(2-carboxyethyl)phosphine) trigger (10 × 10-3 m), the drug release induces the fluorescence increase of both TPE and Cur. Accompanied with the FRET decay, absorption enhancement and particle size increase are observed. The same phenomenon is observed in MCF-7 cells. The FRET-AIE approach can be a useful addition to the spectrum of available methods for monitoring drug release from stimuli-responsive nanomedicine.
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Affiliation(s)
- Xuelin Wang
- School of Pharmaceutical Science & Technology, Tianjin Key Laboratory for Modern Drug Delivery & High Efficiency and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, P. R. China
| | - Juanjuan Li
- School of Pharmaceutical Science & Technology, Tianjin Key Laboratory for Modern Drug Delivery & High Efficiency and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, P. R. China
| | - Qi Yan
- School of Pharmaceutical Science & Technology, Tianjin Key Laboratory for Modern Drug Delivery & High Efficiency and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, P. R. China
| | - Yanrui Chen
- School of Pharmaceutical Science & Technology, Tianjin Key Laboratory for Modern Drug Delivery & High Efficiency and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, P. R. China
| | - Aiping Fan
- School of Pharmaceutical Science & Technology, Tianjin Key Laboratory for Modern Drug Delivery & High Efficiency and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, P. R. China
| | - Zheng Wang
- School of Pharmaceutical Science & Technology, Tianjin Key Laboratory for Modern Drug Delivery & High Efficiency and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, P. R. China.,State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, P. R. China
| | - Yanjun Zhao
- School of Pharmaceutical Science & Technology, Tianjin Key Laboratory for Modern Drug Delivery & High Efficiency and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, P. R. China.,State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300071, P. R. China
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20
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Santana MH, Grande AM, van der Zwaag S, García SJ. Response to Comment on "Turning Vulcanized Natural Rubber into a Self-Healing Polymer: Effect of the Disulfide/Polysulfide Ratio". ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2017. [PMID: 29355241 DOI: 10.1021/acssuschemeng.6b01760] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Affiliation(s)
- Marianella Hernández Santana
- Novel Aerospace Materials Group, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
- Institute of Polymer Science and Technology (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - Antonio M Grande
- Novel Aerospace Materials Group, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Sybrand van der Zwaag
- Novel Aerospace Materials Group, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Santiago J García
- Novel Aerospace Materials Group, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
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21
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Santana M, Grande AM, van der Zwaag S, García SJ. Response to Comment on "Turning Vulcanized Natural Rubber into a Self-Healing Polymer: Effect of the Disulfide/Polysulfide Ratio". ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2017; 5:11127-11129. [PMID: 29355241 PMCID: PMC5771664 DOI: 10.1021/acssuschemeng.7b03647] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 10/23/2017] [Indexed: 05/13/2023]
Affiliation(s)
- Marianella
Hernández Santana
- Novel Aerospace Materials Group, Faculty of Aerospace
Engineering, Delft University of Technology, Kluyverweg 1, 2629
HS Delft, The Netherlands
- Institute of Polymer Science and
Technology (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid,
Spain
- E-mail:
| | - Antonio M. Grande
- Novel Aerospace Materials Group, Faculty of Aerospace
Engineering, Delft University of Technology, Kluyverweg 1, 2629
HS Delft, The Netherlands
| | - Sybrand van der Zwaag
- Novel Aerospace Materials Group, Faculty of Aerospace
Engineering, Delft University of Technology, Kluyverweg 1, 2629
HS Delft, The Netherlands
| | - Santiago J. García
- Novel Aerospace Materials Group, Faculty of Aerospace
Engineering, Delft University of Technology, Kluyverweg 1, 2629
HS Delft, The Netherlands
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22
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Georg Schulze H, Konorov SO, Piret JM, Blades MW, Turner RFB. Empirical Factors Affecting the Quality of Non-Negative Matrix Factorization of Mammalian Cell Raman Spectra. APPLIED SPECTROSCOPY 2017; 71:2681-2691. [PMID: 28937262 DOI: 10.1177/0003702817732117] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Mammalian cells contain various macromolecules that can be investigated non-invasively with Raman spectroscopy. The particular mixture of major macromolecules present in a cell being probed are reflected in the measured Raman spectra. Determining macromolecular identities and estimating their concentrations from these mixture Raman spectra can distinguish cell types and otherwise enable biological research. However, the application of canonical multivariate methods, such as principal component analysis (PCA), to perform spectral unmixing yields mathematical solutions that can be difficult to interpret. Non-negative matrix factorization (NNMF) improves the interpretability of unmixed macromolecular components, but can be difficult to apply because ambiguities produced by overlapping Raman bands permit multiple solutions. Furthermore, theoretically sound methods can be difficult to implement in practice. Here we examined the effects of a number of empirical approaches on the quality of NNMF results. These approaches were evaluated on simulated mammalian cell Raman hyperspectra and the results were used to develop an enhanced procedure for implementing NNMF. We demonstrated the utility of this procedure using a Raman hyperspectral data set measured from human islet cells to recover the spectra of insulin and glucagon. This was compared to the relatively inferior PCA of these data.
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Affiliation(s)
- H Georg Schulze
- 1 Michael Smith Laboratories, The University of British Columbia, Vancouver, BC, Canada
| | - Stanislav O Konorov
- 1 Michael Smith Laboratories, The University of British Columbia, Vancouver, BC, Canada
- 2 Department of Chemistry, The University of British Columbia, Vancouver, BC, Canada
| | - James M Piret
- 1 Michael Smith Laboratories, The University of British Columbia, Vancouver, BC, Canada
- 3 Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, BC, Canada
| | - Michael W Blades
- 2 Department of Chemistry, The University of British Columbia, Vancouver, BC, Canada
| | - Robin F B Turner
- 1 Michael Smith Laboratories, The University of British Columbia, Vancouver, BC, Canada
- 2 Department of Chemistry, The University of British Columbia, Vancouver, BC, Canada
- 4 Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, BC, Canada
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23
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d'Apuzzo F, Perillo L, Delfino I, Portaccio M, Lepore M, Camerlingo C. Monitoring early phases of orthodontic treatment by means of Raman spectroscopies. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-10. [PMID: 29110445 DOI: 10.1117/1.jbo.22.11.115001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 10/12/2017] [Indexed: 05/06/2023]
Abstract
Gingival crevicular fluid (GCF) is a site-specific exudate in the gingival sulcus. GCF composition changes in response to diseases or mechanical stimuli, such as those occurring during orthodontic treatments. Raman microspectroscopy (μ-RS) and surface-enhanced Raman spectroscopy (SERS) were adopted for a GCF analysis during different initial phases of orthodontic force application. GCF samples were pooled from informed patients using paper cones. SERS spectra were obtained from GCF extracted from these cones, whereas μ-RS spectra were directly acquired on paper cones without any manipulation. The spectral characteristics of the main functional groups and the changes in cytochrome, amide III, and amide I contributions were highlighted in the different phases of orthodontic treatment with both SERS and μ-RS analysis. μ-RS directly performed on the paper cones together with proper statistical methods can offer an effective approach for the development of a tool for monitoring the processes occurring during orthodontic treatments, which may help the clinician in the choice of type of treatment individually for each patient and accelerate and improve the orthodontic therapy.
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Affiliation(s)
- Fabrizia d'Apuzzo
- Università degli Studi della Campania "Luigi Vanvitelli," Dipartimento Multidisciplinare di Speciali, Italy
| | - Letizia Perillo
- Università degli Studi della Campania "Luigi Vanvitelli," Dipartimento Multidisciplinare di Speciali, Italy
| | - Ines Delfino
- Università della Tuscia, Dipartimento di Scienze Ecologiche e Biologiche, Viterbo, Italy
| | - Marianna Portaccio
- Università degli Studi della Campania "Luigi Vanvitelli," Dipartimento di Medicina Sperimentale, Nap, Italy
| | - Maria Lepore
- Università degli Studi della Campania "Luigi Vanvitelli," Dipartimento di Medicina Sperimentale, Nap, Italy
| | - Carlo Camerlingo
- CNR-SPIN, Istituto Superconduttori, Materiali Innovativi e Dispositivi, Pozzuoli, Napoli, Italy
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24
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Tao F, Han Q, Liu K, Yang P. Tuning Crystallization Pathways through the Mesoscale Assembly of Biomacromolecular Nanocrystals. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706843] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Fei Tao
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710119 China
| | - Qian Han
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710119 China
| | - Kaiqiang Liu
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710119 China
| | - Peng Yang
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710119 China
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25
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Tao F, Han Q, Liu K, Yang P. Tuning Crystallization Pathways through the Mesoscale Assembly of Biomacromolecular Nanocrystals. Angew Chem Int Ed Engl 2017; 56:13440-13444. [DOI: 10.1002/anie.201706843] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 08/23/2017] [Indexed: 02/02/2023]
Affiliation(s)
- Fei Tao
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710119 China
| | - Qian Han
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710119 China
| | - Kaiqiang Liu
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710119 China
| | - Peng Yang
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education; School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710119 China
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26
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Balakhnina IA, Brandt NN, Chikishev AY, Mankova AA, Shpachenko IG. Low-frequency vibrational spectroscopy of proteins with different secondary structures. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:91509. [PMID: 28342298 DOI: 10.1117/1.jbo.22.9.091509] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 03/14/2017] [Indexed: 06/06/2023]
Abstract
Fourier transform infrared (FTIR) and Raman spectra of proteins with significantly different structures are measured in a spectral interval of 50 to 500 ?? cm ? 1 and noticeable spectral differences are revealed. Intensities of several spectral bands correlate with contents of secondary structure elements. FTIR spectra of superhelical proteins exhibit developed spectral features that are absent in the spectra of globular proteins. Significant differences of the Raman spectra of proteins that are not directly related to the difference of the secondary structures can be due to differences of tertiary and/or quaternary structure of protein molecules.
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Affiliation(s)
- Irina A Balakhnina
- Lomonosov Moscow State University, Physics Department, Leninskie gory, Moscow, Russia
| | - Nikolay N Brandt
- Lomonosov Moscow State University, Physics Department, Leninskie gory, Moscow, Russia
| | - Andrey Yu Chikishev
- Lomonosov Moscow State University, International Laser Center, Leninskie gory, Moscow, Russia
| | - Anna A Mankova
- Lomonosov Moscow State University, Physics Department, Leninskie gory, Moscow, Russia
| | - Irina G Shpachenko
- Lomonosov Moscow State University, Physics Department, Leninskie gory, Moscow, Russia
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27
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Wang S, Zhou Z, Zhao Z, Zhang H, Haque F, Guo P. Channel of viral DNA packaging motor for real time kinetic analysis of peptide oxidation states. Biomaterials 2017; 126:10-17. [PMID: 28237908 PMCID: PMC5421631 DOI: 10.1016/j.biomaterials.2017.01.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 12/22/2016] [Accepted: 01/27/2017] [Indexed: 10/20/2022]
Abstract
Nanopore technology has become a powerful tool in single molecule sensing, and protein nanopores appear to be more advantageous than synthetic counterparts with regards to channel amenability, structure homogeneity, and production reproducibility. However, the diameter of most of the well-studied protein nanopores is too small to allow the passage of protein or peptides that are typically in multiple nanometers scale. The portal channel from bacteriophage SPP1 has a large channel size that allows the translocation of peptides with higher ordered structures. Utilizing single channel conductance assay and optical single molecule imaging, we observed translocation of peptides and quantitatively analyzed the dynamics of peptide oligomeric states in real-time at single molecule level. The oxidative and the reduced states of peptides were clearly differentiated based on their characteristic electronic signatures. A similar Gibbs free energy (ΔG0) was obtained when different concentrations of substrates were applied, suggesting that the use of SPP1 nanopore for real-time quantification of peptide oligomeric states is feasible. With the intrinsic nature of size and conjugation amenability, the SPP1 nanopore has the potential for development into a tool for the quantification of peptide and protein structures in real time.
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Affiliation(s)
- Shaoying Wang
- College of Pharmacy, Division of Pharmaceutics and Pharmaceutical Chemistry; College of Medicine, Department of Physiology & Cell Biology; and Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, USA; College of Pharmacy, Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA
| | - Zhi Zhou
- College of Pharmacy, Division of Pharmaceutics and Pharmaceutical Chemistry; College of Medicine, Department of Physiology & Cell Biology; and Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, USA
| | - Zhengyi Zhao
- College of Pharmacy, Division of Pharmaceutics and Pharmaceutical Chemistry; College of Medicine, Department of Physiology & Cell Biology; and Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, USA; College of Pharmacy, Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA
| | - Hui Zhang
- College of Pharmacy, Division of Pharmaceutics and Pharmaceutical Chemistry; College of Medicine, Department of Physiology & Cell Biology; and Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, USA
| | - Farzin Haque
- College of Pharmacy, Division of Pharmaceutics and Pharmaceutical Chemistry; College of Medicine, Department of Physiology & Cell Biology; and Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, USA
| | - Peixuan Guo
- College of Pharmacy, Division of Pharmaceutics and Pharmaceutical Chemistry; College of Medicine, Department of Physiology & Cell Biology; and Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, USA.
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28
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Sheng L, Wang J, Huang M, Xu Q, Ma M. The changes of secondary structures and properties of lysozyme along with the egg storage. Int J Biol Macromol 2016; 92:600-606. [DOI: 10.1016/j.ijbiomac.2016.07.068] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 07/18/2016] [Accepted: 07/21/2016] [Indexed: 10/21/2022]
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29
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Kurouski D, Van Duyne RP, Lednev IK. Exploring the structure and formation mechanism of amyloid fibrils by Raman spectroscopy: a review. Analyst 2016; 140:4967-80. [PMID: 26042229 DOI: 10.1039/c5an00342c] [Citation(s) in RCA: 176] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Amyloid fibrils are β-sheet rich protein aggregates that are strongly associated with various neurodegenerative diseases. Raman spectroscopy has been broadly utilized to investigate protein aggregation and amyloid fibril formation and has been shown to be capable of revealing changes in secondary and tertiary structures at all stages of fibrillation. When coupled with atomic force (AFM) and scanning electron (SEM) microscopies, Raman spectroscopy becomes a powerful spectroscopic approach that can investigate the structural organization of amyloid fibril polymorphs. In this review, we discuss the applications of Raman spectroscopy, a unique, label-free and non-destructive technique for the structural characterization of amyloidogenic proteins, prefibrilar oligomers, and mature fibrils.
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Affiliation(s)
- Dmitry Kurouski
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois, USA.
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30
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Adornetto G, Fabiani L, Volpe G, De Stefano A, Martini S, Nenna R, Lucantoni F, Bonamico M, Tiberti C, Moscone D. An electrochemical immunoassay for the screening of celiac disease in saliva samples. Anal Bioanal Chem 2015; 407:7189-96. [PMID: 26168969 DOI: 10.1007/s00216-015-8884-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 06/15/2015] [Accepted: 06/26/2015] [Indexed: 11/30/2022]
Abstract
A highly sensitive electrochemical immunoassay for the initial diagnosis of celiac disease (CD) in saliva samples that overcomes the problems related to its high viscosity and to the low concentration of anti-transglutaminase antigen (tTG) IgA in this medium has been developed for the first time. The system uses magnetic beads (MBs) covered with tTG, which reacts with the anti-tTG IgA antibodies present in positive saliva samples. An anti-human IgA, conjugated with alkaline phosphate (AP) enzyme, was used as the label and a strip of eight magnetized screen-printed electrodes as the electrochemical transducer. In particular, two different immunoassay approaches were optimized and blindly compared to analyze a large number of saliva samples, whose anti-tTG IgA levels were independently determined by the radioimmunoassay (RIA) method. The obtained results, expressed as Ab index, were used to perform a diagnostic test evaluation through the construction of receiver operating characteristic (ROC) curves. The approach, involving a pre-incubation between the anti-human IgA-AP and saliva samples prior to the addition of MBs-tTG, showed a cutoff of 0.022 with 95% clinical sensitivity and 96% clinical specificity. The area under the ROC curve is equal to 1, a result that classifies our test as "perfect." This study demonstrates that it is possible to perform the screening of CD with a rapid, simple, inexpensive, and sensitive method able to detect anti-tTG antibodies in saliva samples, which are easily obtained by non-invasive techniques. This aspect is of fundamental importance to screen a large number of subjects, especially in the pediatric age.
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Affiliation(s)
- Gianluca Adornetto
- Department of Chemical Science and Technologies, Tor Vergata University, Via della Ricerca Scientifica, 00133, Rome, Italy
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31
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Svetlakova AS, Brandt NN, Priezzhev AV, Chikishev AY. Raman microspectroscopy of nanodiamond-induced structural changes in albumin. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:047004. [PMID: 25901656 DOI: 10.1117/1.jbo.20.4.047004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 03/30/2015] [Indexed: 06/04/2023]
Abstract
Nanodiamonds (NDs) are promising agents for theranostic applications due to reported low toxicity and high biocompatibility, which is still being extensively tested on cellular, tissue, and organism levels. It is presumed that for experimental and future clinical applications, NDs will be administered into the organism via the blood circulation system. In this regard, the interaction of NDs with blood components needs to be thoroughly studied. We studied the interaction of carboxylated NDs (cNDs) with albumin, one of the major proteins of blood plasma. After 2-h long in vitro incubation in an aqueous solution of the protein, 100-nm cNDs were dried and the dry samples were studied with the aid of Raman microspectroscopy. The spectroscopic data indicate significant conformational changes that can be due to cND–protein interaction. A possible decrease in the functional activity of albumin related to the conformational changes must be taken into account in the in vivo applications.
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Affiliation(s)
- Anastasiya S Svetlakova
- Lomonosov Moscow State University, Physics Department, Leninskie Gory 1/62, Moscow 119991, Russia
| | - Nikolay N Brandt
- Lomonosov Moscow State University, Physics Department, Leninskie Gory 1/62, Moscow 119991, Russia
| | - Alexander V Priezzhev
- Lomonosov Moscow State University, Physics Department, Leninskie Gory 1/62, Moscow 119991, RussiabLomonosov Moscow State University, International Laser Center, Leninskie Gory 1/62, Moscow 119992, Russia
| | - Andrey Yu Chikishev
- Lomonosov Moscow State University, International Laser Center, Leninskie Gory 1/62, Moscow 119992, Russia
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32
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Rosario-Alomar MF, Quiñones-Ruiz T, Kurouski D, Sereda V, Ferreira EB, Jesús-Kim LD, Hernández-Rivera S, Zagorevski DV, López-Garriga J, Lednev IK. Hydrogen sulfide inhibits amyloid formation. J Phys Chem B 2015; 119:1265-74. [PMID: 25545790 PMCID: PMC4315425 DOI: 10.1021/jp508471v] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
![]()
Amyloid
fibrils are large aggregates of misfolded proteins, which
are often associated with various neurodegenerative diseases such
as Alzheimer’s, Parkinson’s, Huntington’s, and
vascular dementia. The amount of hydrogen sulfide (H2S)
is known to be significantly reduced in the brain tissue of people
diagnosed with Alzheimer’s disease relative to that of healthy
individuals. These findings prompted us to investigate the effects
of H2S on the formation of amyloids in vitro using a model fibrillogenic protein hen egg white lysozyme (HEWL).
HEWL forms typical β-sheet rich fibrils during the course of
70 min at low pH and high temperatures. The addition of H2S completely inhibits the formation of β-sheet and amyloid
fibrils, as revealed by deep UV resonance Raman (DUVRR) spectroscopy
and ThT fluorescence. Nonresonance Raman spectroscopy shows that disulfide
bonds undergo significant rearrangements in the presence of H2S. Raman bands corresponding to disulfide (RSSR) vibrational
modes in the 550–500 cm–1 spectral range
decrease in intensity and are accompanied by the appearance of a new
490 cm–1 band assigned to the trisulfide group (RSSSR)
based on the comparison with model compounds. The formation of RSSSR
was proven further using a reaction with TCEP reduction agent and
LC-MS analysis of the products. Intrinsic tryptophan fluorescence
study shows a strong denaturation of HEWL containing trisulfide bonds.
The presented evidence indicates that H2S causes the formation
of trisulfide bridges, which destabilizes HEWL structure, preventing
protein fibrillation. As a result, small spherical aggregates of unordered
protein form, which exhibit no cytotoxicity by contrast with HEWL
fibrils.
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Affiliation(s)
- Manuel F Rosario-Alomar
- Department of Chemistry and ‡Department of Biology, University of Puerto Rico at Mayagüez , Mayagüez, Puerto Rico 00693
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Abstract
This paper reports a new application of surface enhanced Raman scattering (SERS) in analysis of oxidation of glutathione to oxidized glutathione, an important biochemical redox reaction in biological systems.
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Affiliation(s)
- Shanshan Ma
- Key Laboratory of Ion Beam Bio-engineering
- Institute of Technical Biology and Agriculture Engineering
- Hefei Institutes of Physical Science
- Chinese Academy of Sciences
- Hefei
| | - Qing Huang
- Key Laboratory of Ion Beam Bio-engineering
- Institute of Technical Biology and Agriculture Engineering
- Hefei Institutes of Physical Science
- Chinese Academy of Sciences
- Hefei
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34
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Yu D, Cai JY, Church JS, Wang L. Modifying surface resistivity and liquid moisture management property of keratin fibers through thiol-ene click reactions. ACS APPLIED MATERIALS & INTERFACES 2014; 6:1236-1242. [PMID: 24367993 DOI: 10.1021/am405060x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This paper reports on a new method for improving the antistatic and liquid moisture management properties of keratinous materials. The method involves the generation of thiols by controlled reduction of cystine disulfide bonds in keratin with tris(2-carboxyethyl) phosphine hydrochloride and subsequent grafting of hydrophilic groups onto the reduced keratin by reaction with an acrylate sulfonate or acrylamide sulfonate through thiol-ene click chemistry. The modified substrates were characterized with Raman spectroscopy and scanning electron microscopy and evaluated for their performance changes in liquid moisture management, surface resistivity, and wet burst strength. The results have revealed that the thiol-acrylate reaction is more efficient than the thiol-acrylamide reaction, and the keratinous substrate modified with an acrylate sulfonate salt exhibits significantly improved antistatic and liquid moisture management properties.
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Affiliation(s)
- Dan Yu
- CSIRO Materials Science and Engineering , P.O. Box 21, Belmont, Victoria 3216, Australia
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35
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Schmidt AC, Mickein K. Qualitative and quantitative characterization of the arsenic-binding behaviour of sulfur-containing peptides and proteins by the coupling of reversed phase liquid chromatography to electrospray ionization mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2012; 47:949-961. [PMID: 22899503 DOI: 10.1002/jms.3025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Phenylarsenic-substituted cysteine-containing peptides and proteins were completely differentiated from their unbound original forms by the coupling of reversed phase liquid chromatography with electrospray ionization mass spectrometry. The analysis of biomolecules possessing structure-stabilizing disulfide bridges after reduction provides new insights into requirements concerning the accessibility of cysteine residues for reducing agents as well as for arsenic compounds in a spatial protein structure. Complementary binding studies performed using direct ESI-MS without chromatographic coupling in different solvent systems demonstrated that more than one binding site were activated for aprotinin and lysozyme in denaturing solvents because of a stronger defolding. From the intensities of the different charge states occurring in the mass spectra as well as from the LC elution behaviour, it can be deduced that the folding state of the arsenic-bound protein species resembles the native, oxidized conformation. In contrast, although the milk protein α-lactalbumin has several disulfide bridges, only one phenylarsenic moiety was bound under strongly denaturing conditions. Because of the charge state distribution in the ESI mass spectra, a conformational change to a molten globule structure is assumed. For the second considered milk protein ß-lactoglobulin, a noncovalent interaction with phenylarsine oxide was detected. In general, smaller apparent binding constants for the condensation reactions of the biomolecules with phenylarsine oxide leading to covalent arsenic-sulfur bindings were determined from direct injection ESI-MS measurements than from LC-ESI-MS coupling. The following order of binding affinities for one phenylarsenic group can be assumed from both ESI-MS and LC-ESI-MS: nonapeptide vasopressin > nonapeptide vasotocin > lysozyme > aprotinin > α-lactalbumin > thioredoxin. Kinetic investigations by LC-ESI-MS yielded a partial reaction order of 2 for vasopressin, Lys and α-lactalbumin and corresponding half-lives of 0.93, 2.56 and 123.5 min, respectively.
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Affiliation(s)
- Anne-Christine Schmidt
- Institute of Analytical Chemistry, Technical University Bergakademie Freiberg, Leipziger Straße 29, D-09599, Freiberg, Germany.
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36
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Liu H, Wang Y, Shen A, Zhou X, Hu J. Highly selective and sensitive method for cysteine detection based on fluorescence resonance energy transfer between FAM-tagged ssDNA and graphene oxide. Talanta 2012; 93:330-5. [DOI: 10.1016/j.talanta.2012.02.044] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 02/20/2012] [Accepted: 02/22/2012] [Indexed: 11/25/2022]
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37
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Carpentier P, Royant A, Weik M, Bourgeois D. Raman-Assisted Crystallography Suggests a Mechanism of X-Ray-Induced Disulfide Radical Formation and Reparation. Structure 2010; 18:1410-9. [DOI: 10.1016/j.str.2010.09.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2010] [Revised: 08/27/2010] [Accepted: 09/23/2010] [Indexed: 11/24/2022]
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38
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David C, Enescu M. Free Energy Calculations on Disulfide Bridges Reduction in Proteins by Combining ab Initio and Molecular Mechanics Methods. J Phys Chem B 2010; 114:3020-7. [DOI: 10.1021/jp910340t] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Catalina David
- Laboratoire de Chimie Physique et Rayonnement, UMR CEA E4, University of Franche-Comte, 16 route de Gray, 25030 Besancon, France
| | - Mironel Enescu
- Laboratoire de Chimie Physique et Rayonnement, UMR CEA E4, University of Franche-Comte, 16 route de Gray, 25030 Besancon, France
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39
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How does microhydration impact on structure, spectroscopy and formation of disulfide radical anions? An ab initio investigation on dimethyldisulfide. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.09.079] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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