1
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Matsui M, Murata T, Kurobe-Takashima Y, Ikeda T, Noguchi-Shinohara M, Ono K, Shidara H, Otsuka K, Kuriki D, Suzuki M, Kobayashi S. Lutein from Chicken Eggs Prevents Amyloid β-Peptide Aggregation In Vitro and Amyloid β-Induced Inflammation in Human Macrophages (THP-1). ACS OMEGA 2024; 9:26616-26627. [PMID: 38911805 PMCID: PMC11191573 DOI: 10.1021/acsomega.4c03353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/10/2024] [Accepted: 05/15/2024] [Indexed: 06/25/2024]
Abstract
Epidemiological studies predict that chicken eggs contain constituents other than proteins that prevent Alzheimer's disease. This study screened for constituents that inhibit the aggregation of amyloid β peptide (Aβ)1-42 and elucidated their mechanisms to explore the active components of chicken eggs. Thioflavin T assays and transmission electron microscopy observations showed that arachidonic acid (ARA), lysophosphatidylcholine, lutein (LTN), palmitoleic acid, and zeaxanthin inhibited Aβ aggregation. Among these, ARA and LTN showed the highest activity. Photoinduced cross-linking of unmodified protein assays and infrared absorption spectrometry measurements showed that LTN strongly inhibited highly toxic Aβ1-42 protofibril formation. Furthermore, LTN suppressed Aβ1-42-induced IL 1B and TNF expression in human macrophage-like cells. In summary, LTN plays a crucial role in the AD-preventive effect of chicken eggs by suppressing Aβ1-42 aggregation and Aβ1-42-induced inflammation.
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Affiliation(s)
- Misuzu Matsui
- Department
of Applied Biological Chemistry, Graduate School of Agricultural and
Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Tomofusa Murata
- Department
of Applied Biological Chemistry, Graduate School of Agricultural and
Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Yuki Kurobe-Takashima
- Department
of Applied Biological Chemistry, Graduate School of Agricultural and
Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Tokuhei Ikeda
- Department
of Neurology, Kanazawa University Graduate
School of Medical Sciences, Kanazawa 920-1192, Japan
| | - Moeko Noguchi-Shinohara
- Department
of Neurology, Kanazawa University Graduate
School of Medical Sciences, Kanazawa 920-1192, Japan
| | - Kenjiro Ono
- Department
of Neurology, Kanazawa University Graduate
School of Medical Sciences, Kanazawa 920-1192, Japan
| | | | - Kurataka Otsuka
- R&D
Division, Kewpie Corporation, Tokyo 150-0002, Japan
- Division
of Translational Oncology, Fundamental Innovative Oncology Core, National Cancer Center Research Institute, Tokyo 104-0045, Japan
- Tokyo
NODAI Research Institute, Tokyo University
of Agriculture, Tokyo 156-8502, Japan
- Division
of Molecular and Cellular Medicine, Institute of Medical Science, Tokyo Medical University, Tokyo 160-8402, Japan
| | - Daisuke Kuriki
- R&D
Division, Kewpie Corporation, Tokyo 150-0002, Japan
- Division
of Translational Oncology, Fundamental Innovative Oncology Core, National Cancer Center Research Institute, Tokyo 104-0045, Japan
| | - Michio Suzuki
- Department
of Applied Biological Chemistry, Graduate School of Agricultural and
Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Shoko Kobayashi
- Department
of Applied Biological Chemistry, Graduate School of Agricultural and
Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
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2
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Lindberg M, Axell E, Sparr E, Linse S. A label-free high-throughput protein solubility assay and its application to Aβ40. Biophys Chem 2024; 307:107165. [PMID: 38309218 DOI: 10.1016/j.bpc.2023.107165] [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: 10/02/2023] [Revised: 12/18/2023] [Accepted: 12/25/2023] [Indexed: 02/05/2024]
Abstract
A major hallmark of Alzheimer's disease is the accumulation of aggregated amyloid β peptide (Aβ) in the brain. Here we develop a solubility assay for proteins and measure the solubility of Aβ40. In brief, the method utilizes 96-well filter plates to separate monomeric Aβ from aggregated Aβ, and the small species are quantified with the amine reactive dye o-phthalaldehyde (OPA). This procedure ensures that solubility is measured for unlabeled species, and makes the assay high-throughput and inexpensive. We demonstrate that the filter plates successfully separate fibrils from monomer, with negligible monomer adsorption, and that OPA can quantify Aβ peptides in a concentration range from 40 nM to 20 μM. We also show that adding a methionine residue to the N-terminus of Aβ1-40 decreases the solubility by <3-fold. The method will facilitate further solubility studies, and contribute to the understanding of the thermodynamics of amyloid fibril formation.
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Affiliation(s)
- Max Lindberg
- Biochemistry and Structural Biology, Lund University, Lund, Sweden
| | - Emil Axell
- Biochemistry and Structural Biology, Lund University, Lund, Sweden
| | - Emma Sparr
- Division of Physical Chemistry, Department of Chemistry, Lund University, Lund, Sweden
| | - Sara Linse
- Biochemistry and Structural Biology, Lund University, Lund, Sweden.
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3
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Pandey G, Phatale V, Khairnar P, Kolipaka T, Shah S, Famta P, Jain N, Srinivasarao DA, Rajinikanth PS, Raghuvanshi RS, Srivastava S. Supramolecular self-assembled peptide-engineered nanofibers: A propitious proposition for cancer therapy. Int J Biol Macromol 2024; 256:128452. [PMID: 38042321 DOI: 10.1016/j.ijbiomac.2023.128452] [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: 09/25/2023] [Revised: 11/23/2023] [Accepted: 11/24/2023] [Indexed: 12/04/2023]
Abstract
Cancer is a devastating disease that causes a substantial number of deaths worldwide. Current therapeutic interventions for cancer include chemotherapy, radiation therapy, or surgery. These conventional therapeutic approaches are associated with disadvantages such as multidrug resistance, destruction of healthy tissues, and tissue toxicity. Therefore, there is a paradigm shift in cancer management wherein nanomedicine-based novel therapeutic interventions are being explored to overcome the aforementioned disadvantages. Supramolecular self-assembled peptide nanofibers are emerging drug delivery vehicles that have gained much attention in cancer management owing to their biocompatibility, biodegradability, biomimetic property, stimuli-responsiveness, transformability, and inherent therapeutic property. Supramolecules form well-organized structures via non-covalent linkages, the intricate molecular arrangement helps to improve tissue permeation, pharmacokinetic profile and chemical stability of therapeutic agents while enabling targeted delivery and allowing efficient tumor imaging. In this review, we present fundamental aspects of peptide-based self-assembled nanofiber fabrication their applications in monotherapy/combinatorial chemo- and/or immuno-therapy to overcome multi-drug resistance. The role of self-assembled structures in targeted/stimuli-responsive (pH, enzyme and photo-responsive) drug delivery has been discussed along with the case studies. Further, recent advancements in peptide nanofibers in cancer diagnosis, imaging, gene therapy, and immune therapy along with regulatory obstacles towards clinical translation have been deliberated.
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Affiliation(s)
- Giriraj Pandey
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Vivek Phatale
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Pooja Khairnar
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Tejaswini Kolipaka
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Saurabh Shah
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Paras Famta
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Naitik Jain
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Dadi A Srinivasarao
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - P S Rajinikanth
- Department of Pharmaceutical Sciences, Babasaheb Bhimrao Ambedkar University, Lucknow, India
| | - Rajeev Singh Raghuvanshi
- Central Drugs Standard Control Organization (CDSCO), Directorate General of Health Services, Ministry of Health & Family Welfare, Government of India, India
| | - Saurabh Srivastava
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India.
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4
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Cheung DL. Aggregation of an Amyloidogenic Peptide on Gold Surfaces. Biomolecules 2023; 13:1261. [PMID: 37627326 PMCID: PMC10452923 DOI: 10.3390/biom13081261] [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: 07/06/2023] [Revised: 08/03/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023] Open
Abstract
Solid surfaces have been shown to affect the aggregation and assembly of many biomolecular systems. One important example is the formation of protein fibrils, which can occur on a range of biological and synthetic surfaces. The rate of fibrillation depends on both the protein structure and the surface chemistry, with the different molecular and oligomer structures adopted by proteins on surfaces likely to be crucial. In this paper, the aggregation of the model amyloidogenic peptide, Aβ(16-22), corresponding to a hydrophobic segment of the amyloid beta protein on a gold surface is studied using molecular dynamics simulation. Previous simulations of this peptide on gold surfaces have shown that it adopts conformations on surfaces that are quite different from those in bulk solution. These simulations show that this then leads to significant differences in the oligomer structures formed in solution and on gold surfaces. In particular, oligomers formed on the surface are low in beta-strands so are unlike the structures formed in bulk solution. When oligomers formed in solution adsorb onto gold surfaces they can then restructure themselves. This can then help explain the inhibition of Aβ(16-22) fibrillation by gold surfaces and nanoparticles seen experimentally.
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Affiliation(s)
- David L Cheung
- School of Biological and Chemical Sciences, University of Galway, H91 TK33 Galway, Ireland
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5
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Kikuchi K, Date K, Ueno T. Design of a Hierarchical Assembly at a Solid-Liquid Interface Using an Asymmetric Protein Needle. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:2389-2397. [PMID: 36734675 DOI: 10.1021/acs.langmuir.2c03146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Design and control of processes for a hierarchical assembly of proteins remain challenging because it requires consideration of design principles with atomic-level accuracy. Previous studies have adopted symmetry-based strategies to minimize the complexity of protein-protein interactions and this has placed constraints on the structures of the resulting protein assemblies. In the present work, we used an anisotropic-shaped protein needle, gene product 5 (gp5) from bacteriophage T4 with a C-terminal hexahistidine-tag (His-tag) (gp5_CHis), to construct a hierarchical assembly with two distinct protein-protein interaction sites. High-speed atomic force microscopy (HS-AFM) measurements reveal that it forms unique tetrameric clusters through its N-terminal head on a mica surface. The clusters further self-assemble into a monolayer through the C-terminal His-tag. The HS-AFM images and displacement analyses show that the monolayer is a network-like structure rather than a crystalline lattice. Our results expand the toolbox for constructing hierarchical protein assemblies based on structural anisotropy.
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Affiliation(s)
- Kosuke Kikuchi
- School of Life Science and Technology, Tokyo Institute of Technology, 4259-B-55, Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan
| | - Koki Date
- School of Life Science and Technology, Tokyo Institute of Technology, 4259-B-55, Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan
| | - Takafumi Ueno
- School of Life Science and Technology, Tokyo Institute of Technology, 4259-B-55, Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan
- Living Systems Materialogy (LiSM) Research Group, International Research Frontiers Initiative (IRFI), Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama 226-8501, Japan
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6
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Sønderby TV, Zou Y, Wang P, Wang C, Otzen DE. Molecular-level insights into the surface-induced assembly of functional bacterial amyloid. Biophys J 2022; 121:3422-3434. [PMID: 35982614 PMCID: PMC9515228 DOI: 10.1016/j.bpj.2022.08.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 08/07/2022] [Accepted: 08/15/2022] [Indexed: 11/26/2022] Open
Abstract
Protein coating material is important in many technological fields. The interaction between carbon nanomaterial and protein is especially interesting since it makes the development of novel hybrid materials possible. Functional bacterial amyloid (FuBA) is promising as a coating material because of its desirable features, such as well-defined molecular structure, robustness against harsh conditions, and easily engineerable functionality. Here, we report the systematic assembly of the functional amyloid protein, CsgA, from Escherichia coli (E. coli) on graphite. We characterize the assemblies using scanning tunneling microscopy (STM) and show that CsgA forms assemblies according to systematic patterns, dictated by the graphite lattice. In addition, we show that graphite flakes induce the fibrillization of CsgA, in vitro, suggesting a surface-induced conformational change of CsgA facilitated by the graphite lattice. Using coarse-grained molecular dynamics simulations, we model the adhesion and lamellar formation of a CsgA-derived peptide and conclude that peptides are adsorbed both as monomers and smaller aggregates leading initially to unordered graphite-bound aggregates, which are followed by rearrangement into lamellar structures. Finally, we show that CsgA-derived peptides can be immobilized in very systematic assemblies and their molecular orientation can be tuned using a small chaperone-like molecule. Our findings have implications for the development of FuBA-based biosensors, catalysts, and other technologies requiring well-defined protein assemblies on graphite.
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Affiliation(s)
- Thorbjørn Vincent Sønderby
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus C, Denmark; Sino-Danish Center (SDC), Eastern Yanqihu Campus, University of Chinese Academy of Sciences, Beijing, China
| | - Yimin Zou
- National Center for Nanoscience and Technology, Beijing, China
| | - Pengyu Wang
- National Center for Nanoscience and Technology, Beijing, China
| | - Chen Wang
- National Center for Nanoscience and Technology, Beijing, China.
| | - Daniel Erik Otzen
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus C, Denmark.
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7
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Geng Y, Huang T, Zhou W, Shen L. Physical Mechanism of Amyloid-β Peptide Chain Aggregation on Fluidic Lipid Nanotubules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5752-5758. [PMID: 35476922 DOI: 10.1021/acs.langmuir.2c00357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The question of how peptide chain aggregation is influenced by lipid membranes with varying shapes and structures is crucial for a detailed understanding of the neurotoxicity effect of the peptide chains. Not like the more usual spherical liposomes and planar lipid membranes, herein, we use lipid nanotubules as a model of important neuron synapse nanowire structures and devote particular attention to the effect of nanotubule fluidity on amyloid-β peptide (Aβ) chain aggregation. We apply single-molecule tracking (SMT) to elucidate how Aβ chains diffuse and aggregate on lipid nanotubules with different fluidities. The physical mechanism implies that fluidic lipid nanotubules facilitate the super-diffusion of two-dimensional (2D)-mobile precursor Aβ chains and promote their aggregation. This aggregation mechanism is retarded on less fluidic lipid nanotubules where the super-diffusion of 2D-mobile precursor Aβ chains is restricted by "frozen" lipids with less mobility. This work provides a mechanistic explanation for Aβ chain aggregation on fluidic lipid nanotubules.
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8
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Wen L, Shen L. Effect of Surface-Chelated Cu 2+ on Amyloid-β Peptide Fibrillation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:174-181. [PMID: 34932369 DOI: 10.1021/acs.langmuir.1c02322] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Abnormal interactions of copper (Cu) ions with amyloid-β (Aβ) peptides are believed to play an important role in the pathogenesis of Alzheimer's disease (AD). However, there is still debate as to the exact role of Cu ions in Aβ amyloidosis despite extensive studies on Aβ-Cu interactions. Unlike previously reported works, we herein study the effect of surface-chelated Cu2+, rather than the more usual solution-phase dissolved Cu2+, on Aβ aggregation. Through the combination of single molecule fluorescent tracking, atomic force microscopy imaging experiments, and all-atom molecular dynamic simulations, we show that the surface-chelated Cu2+ dynamically interacts with Aβ chains, restricts their 2D-diffusivity on the surface, and retards their fibrillation, while the designated surfaces without Cu2+ facilitate the 2D-diffusivity of Aβ chains for better interpeptide interaction and promote Aβ fibrillation. We offer a microscopic molecular insight into the retardation mechanism of surface-chelated Cu2+ on Aβ fibrillation, suggesting that the surface-bound pools of metal ions are critical in AD progression and drug design.
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Affiliation(s)
- Lisi Wen
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Lei Shen
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
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9
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Song Y, Geng Y, Shen L. Visualizing Super-Diffusion, Oligomerization, and Fibrillation of Amyloid-β Peptide Chains along Tubular Membranes. ACS Macro Lett 2021; 10:1295-1299. [PMID: 35549032 DOI: 10.1021/acsmacrolett.1c00541] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A deeper mechanistic study of peptide amyloidosis on lipid membranes with varying shapes could enhance the comprehensive understanding of the contribution of cellular structures to multiple neurodegenerative diseases, including Alzheimer's disease. We report here the direct visual observation of amyloid-β peptide (Aβ) superdiffusing along tubular lipid membranes via single-molecule tracking (SMT). Such mobility on tubular membranes is critical, as it allows Aβ chains to oligomerize and elongate into fibrils. Factors such as cholesterol that favor Aβ chains with sufficient surface residence time can promote the inter-Aβ interaction and enhance Aβ fibrillation. This study provides previously uncharacterized insights into the chain behaviors of Aβ along important biological nanowire structures, which is essential to understanding and exploring the factors of cellular shapes to manipulate peptide amyloidosis.
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Affiliation(s)
- Yuhang Song
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Yu Geng
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Lei Shen
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
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10
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Co NT, Li MS. Effect of Surface Roughness on Aggregation of Polypeptide Chains: A Monte Carlo Study. Biomolecules 2021; 11:biom11040596. [PMID: 33919640 PMCID: PMC8072528 DOI: 10.3390/biom11040596] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 04/14/2021] [Accepted: 04/15/2021] [Indexed: 12/11/2022] Open
Abstract
The self-assembly of amyloidogenic peptides and proteins into fibrillar structures has been intensively studied for several decades, because it seems to be associated with a number of neurodegenerative diseases, such as Alzheimer’s and Parkinson’s disease. Therefore, understanding the molecular mechanisms of this phenomenon is important for identifying an effective therapy for the corresponding diseases. Protein aggregation in living organisms very often takes place on surfaces like membranes and the impact of a surface on this process depends not only on the surface chemistry but also on its topology. Our goal was to develop a simple lattice model for studying the role of surface roughness in the aggregation kinetics of polypeptide chains and the morphology of aggregates. We showed that, consistent with the experiment, an increase in roughness slows down the fibril formation, and this process becomes inhibited at a very highly level of roughness. We predicted a subtle catalytic effect that a slightly rough surface promotes the self-assembly of polypeptide chains but does not delay it. This effect occurs when the interaction between the surface and polypeptide chains is moderate and can be explained by taking into account the competition between energy and entropy factors.
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Affiliation(s)
- Nguyen Truong Co
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland;
| | - Mai Suan Li
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland;
- Institute for Computational Science and Technology, SBI Building, Quang Trung Software City, Tan Chanh Hiep Ward, District 12, Ho Chi Minh City 700000, Vietnam
- Correspondence:
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11
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Zhao B, Yang S, Deng J, Pan K. Chiral Graphene Hybrid Materials: Structures, Properties, and Chiral Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2003681. [PMID: 33854894 PMCID: PMC8025009 DOI: 10.1002/advs.202003681] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 11/14/2020] [Indexed: 05/02/2023]
Abstract
Chirality has become an important research subject. The research areas associated with chirality are under substantial development. Meanwhile, graphene is a rapidly growing star material and has hard-wired into diverse disciplines. Rational combination of graphene and chirality undoubtedly creates unprecedented functional materials and may also lead to great findings. This hypothesis has been clearly justified by the sizable number of studies. Unfortunately, there has not been any previous review paper summarizing the scattered studies and advancements on this topic so far. This overview paper attempts to review the progress made in chiral materials developed from graphene and their derivatives, with the hope of providing a systemic knowledge about the construction of chiral graphenes and chiral applications thereof. Recently emerging directions, existing challenges, and future perspectives are also presented. It is hoped this paper will arouse more interest and promote further faster progress in these significant research areas.
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Affiliation(s)
- Biao Zhao
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing100029China
- College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Shenghua Yang
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing100029China
- College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Jianping Deng
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing100029China
- College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Kai Pan
- College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China
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12
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Guan Y, Yu D, Sun H, Ren J, Qu X. Aβ aggregation behavior at interfaces with switchable wettability: a bioinspired perspective to understand amyloid formation. Chem Commun (Camb) 2021; 57:2641-2644. [PMID: 33587062 DOI: 10.1039/d0cc07546a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
An amphiphilic taurocholic acid (TCA) doped polypyrrole (PPy) film (PPy/TCA) was used as a dynamic mimic membrane model to explore how switchable surface wettability influences amyloid aggregation. Our results indicate that the hydrophobic surface, not the hydrophilic surface, plays important roles in Aβ40 adsorption and aggregation.
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Affiliation(s)
- Yijia Guan
- Laboratory of Chemical Biology, Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China. and Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Henan, Jiaozuo 454003, P. R. China
| | - Dongqin Yu
- Laboratory of Chemical Biology, Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China. and University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Hanjun Sun
- Laboratory of Chemical Biology, Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China.
| | - Jinsong Ren
- Laboratory of Chemical Biology, Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China. and University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Xiaogang Qu
- Laboratory of Chemical Biology, Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China. and University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
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13
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Gomes GN, Levine ZA. Defining the Neuropathological Aggresome across in Silico, in Vitro, and ex Vivo Experiments. J Phys Chem B 2021; 125:1974-1996. [PMID: 33464098 PMCID: PMC8362740 DOI: 10.1021/acs.jpcb.0c09193] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The loss of proteostasis over the life course is associated with a wide range of debilitating degenerative diseases and is a central hallmark of human aging. When left unchecked, proteins that are intrinsically disordered can pathologically aggregate into highly ordered fibrils, plaques, and tangles (termed amyloids), which are associated with countless disorders such as Alzheimer's disease, Parkinson's disease, type II diabetes, cancer, and even certain viral infections. However, despite significant advances in protein folding and solution biophysics techniques, determining the molecular cause of these conditions in humans has remained elusive. This has been due, in part, to recent discoveries showing that soluble protein oligomers, not insoluble fibrils or plaques, drive the majority of pathological processes. This has subsequently led researchers to focus instead on heterogeneous and often promiscuous protein oligomers. Unfortunately, significant gaps remain in how to prepare, model, experimentally corroborate, and extract amyloid oligomers relevant to human disease in a systematic manner. This Review will report on each of these techniques and their successes and shortcomings in an attempt to standardize comparisons between protein oligomers across disciplines, especially in the context of neurodegeneration. By standardizing multiple techniques and identifying their common overlap, a clearer picture of the soluble neuropathological aggresome can be constructed and used as a baseline for studying human disease and aging.
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Affiliation(s)
- Gregory-Neal Gomes
- Department of Pathology, Yale School of Medicine, New Haven, CT, 06520, USA
- Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT 06511, USA
| | - Zachary A. Levine
- Department of Pathology, Yale School of Medicine, New Haven, CT, 06520, USA
- Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT 06511, USA
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14
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Tang X, Gao G, Zhang T, Li J, Yu M, He M, Sun T. Charge effects at nano-bio interfaces: a model of charged gold nanoclusters on amylin fibrillation. NANOSCALE 2020; 12:18834-18843. [PMID: 32895690 DOI: 10.1039/d0nr03877f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The misfolding and abnormal amyloid fibrillation of proteins/peptides are associated with more than 20 human diseases. Although dozens of nanoparticles have been investigated for the inhibition effect on the misfolding and fibrillation of pathogenesis-related proteins/peptides, there are few reports on charge effects of nano inhibitors on amyloid fibrillation. Herein, same-sized gold nanoclusters modified with 2-aminoethanethiol hydrochloride (CSH-AuNCs, positively charged in pH 7.4) or 3-mercaptopropionic acid (MPA-AuNCs, negatively charged in pH 7.4) were synthesized and adopted as models to explore the charge effect of nano inhibitors on amylin fibrillation at the nano-bio interface. ThT fluorescence kinetics analysis, AFM images and circular dichroism (CD) spectra showed that electropositive CSH-AuNCs inhibited the misfolding and fibrillation of amylin in a dosage-dependent manner, but electronegative MPA-AuNCs accelerated the misfolding and fibrillation of amylin in a dosage-dependent manner. Moreover, the theoretical and experimental results revealed the interaction mechanism between amylin and ligands of AuNCs at the nano-bio interfaces. Electropositive CSH-AuNCs could be bound to the main nucleating region of amylin via hydrogen bonding and endowed the nanocomplex with more positive net charges (amylin monomer with a positive +26.23 ± 0.80 mV zeta potential), which would inhibit the misfolding and aggregation of amylin via electrostatic repulsion and steric hindrance. In contrast, electronegative MPA-AuNCs could absorb electropositive amylin via strong electrostatic attractions, which accelerated the fibrillation process of amylin via enhancing local concentrations. Moreover, cell experiments showed that both the charged AuNCs had good biocompatibility and electronegetive MPA-AuNCs showed a better protective effect in the amylin-induced cell model than electropositive CSH-AuNCs. These results provide an insight into structure-based nanodrug design for protein conformational diseases.
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Affiliation(s)
- Xintong Tang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
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15
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Abstract
The formation of dense, linear arrays (fibrils) by biomolecules is the hallmark of a number of degenerative diseases, such as Alzheimer's and type-2 diabetes. Protein fibrils have also attracted interest as building blocks for new materials. It has long been recognized that surfaces can affect the fibrillation process. Recent work on the model fibril forming protein human islet amyloid polypeptide (hIAPP) has shown that while the protein concentration is highest at hydrophobic surfaces, the rate of fibril formation is lower than on other surfaces. To understand this, replica exchange molecular dynamics simulations were used to investigate the conformations that hIAPP adopts on surfaces of different hydrophobicities. The hydrophobic surface stabilizes α-helical structures which are significantly different to those found on the hydrophilic surface and in bulk solution. There is also a greatly reduced conformational ensemble on the hydrophobic surface due to long-lived contacts between hydrophobic residues on the protein and the surface. This new microscopic information will help us determine the mechanism of the enhancement of fibril formation on surfaces and provides new insight into the effect of nanointerfaces and protein conformation.
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16
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Moonitz SA, Shepard N, Noriega R. Multimodal spectroscopic investigation of the conformation and local environment of biomolecules at an electrified interface. J Mater Chem B 2020; 8:7024-7030. [PMID: 32716450 DOI: 10.1039/d0tb01158d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The complex and dynamic interfacial regions between biological samples and electronic components pose many challenges for characterization, including their evolution over multiple temporal and spatial scales. Spectroscopic probes of buried interfaces employing mid-infrared plasmon resonances and time-resolved fluorescence detection in the visible range are used to study the properties of polypeptides adsorbed at the surface of a working electrode. Information from these complementary spectroscopic probes reveals the interplay of solvation, electric fields, and ion concentration on their resulting macromolecular conformations.
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Affiliation(s)
- Sasha A Moonitz
- University of Utah, Department of Chemistry, 315 S. 1400 E, Salt Lake City, UT 84112, USA.
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17
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Taylor AIP, Gahan LD, Chakrabarti B, Staniforth RA. A two-step biopolymer nucleation model shows a nonequilibrium critical point. J Chem Phys 2020; 153:025102. [PMID: 32668930 DOI: 10.1063/5.0009394] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Biopolymer self-assembly pathways are complicated by the ability of their monomeric subunits to adopt different conformational states. This means nucleation often involves a two-step mechanism where the monomers first condense to form a metastable intermediate, which then converts to a stable polymer by conformational rearrangement of constituent monomers. Nucleation intermediates play a causative role in amyloid diseases such as Alzheimer's and Parkinson's. While existing mathematical models neglect the conversion dynamics, experiments show that conversion events frequently occur on comparable timescales to the condensation of intermediates and growth of mature polymers and thus cannot be ignored. We present a model that explicitly accounts for simultaneous assembly and conversion. To describe conversion, we propose an experimentally motivated initiation-propagation mechanism in which the stable phase arises locally within the intermediate and then spreads by nearest-neighbor interactions, in a manner analogous to one-dimensional Glauber dynamics. Our analysis shows that the competing timescales of assembly and conversion result in a nonequilibrium critical point, separating a regime where intermediates are kinetically unstable from one where conformationally mixed intermediates accumulate. This strongly affects the accumulation rate of the stable biopolymer phase. Our model is uniquely able to explain experimental phenomena such as the formation of mixed intermediates and abrupt changes in the scaling exponent γ, which relates the total monomer concentration to the accumulation rate of the stable phase. This provides a first step toward a general model of two-step biopolymer nucleation, which can quantitatively predict the concentration and composition of biologically crucial intermediates.
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Affiliation(s)
- Alexander I P Taylor
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, United Kingdom
| | - Lianne D Gahan
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, United Kingdom
| | - Buddhapriya Chakrabarti
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom
| | - Rosemary A Staniforth
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, United Kingdom
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18
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Menon S, Sengupta N, Das P. Nanoscale Interplay of Membrane Composition and Amyloid Self-Assembly. J Phys Chem B 2020; 124:5837-5846. [DOI: 10.1021/acs.jpcb.0c03796] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Sneha Menon
- Physical Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Neelanjana Sengupta
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Payel Das
- IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, United States
- Applied Physics and Applied Math Department, Columbia University, New York, New York 10027, United States
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19
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Tian M, Shen L. Self-Coiling of Single-Stranded Protofibrils into Rings: A Pathway of Alzheimer's β-Peptide Amyloidosis on Lipid Membranes. ACS Macro Lett 2020; 9:813-818. [PMID: 35648531 DOI: 10.1021/acsmacrolett.0c00262] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
An amyloidosis pathway of Alzheimer's β-peptide Aβ40 on lipid membranes, the self-coiling of single-stranded protofibrils into thermodynamically stable ring structures, is uncovered. Distinct from Aβ amyloid structures reported previously, the coiled rings observed here exhibit a narrow distribution of diameters centered at ∼170 nm and their circumference thicknesses increase as a longer single-stranded protofibril wraps around the ring, indicating the coaxial loop-by-loop winding of individual protofibrils. Such self-coiling is dominated by elastic properties of the flexible protofibrils subject to thermal fluctuations and surface interactions, as supported by an entropic elasticity model from polymer physics concepts. This work not only provides insights into the fundamental physics of Alzheimer's β-peptide amyloidosis but also is useful for designing amyloid filament materials.
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Affiliation(s)
- Mengting Tian
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Lei Shen
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
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20
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Xiong B, Chen Z, Yin X, Wang Y, Jiang H, Zhu J. Diffusion behavior of peptide amphiphiles containing different numbers of alkyl tails at a hydrophobic solid-liquid interface: single molecule tracking investigation. SOFT MATTER 2020; 16:4444-4450. [PMID: 32323701 DOI: 10.1039/d0sm00447b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Using the single molecule tracking technique, the diffusion behavior of peptide amphiphiles (PAs) with different numbers of alkyl tails at a hydrophobic solid-liquid interface has been investigated. The effect of the number of alkyl tails of PAs on molecular trajectories at the hydrophobic solid-liquid interface has been systematically studied. PA molecules display an intermittent motion consisting of immobilization and hopping processes, which has been well simulated by the continuous time random walk (CTRW) model. The results reveal that the hydrophobic interaction between the PAs and hydrophobic surface plays an important role in the diffusion behavior of PAs. Increasing the number of alkyl tails in PAs systematically reduces the mobility of PAs on the hydrophobic surface. Moreover, the diffusion behavior of PAs at the hydrophobic interface also shows pH dependence. A decrease in pH is beneficial to the motion of all PAs on the hydrophobic surface, which can be ascribed to the protonation of PAs in acidic solutions. Therefore, the hydrophobic interaction is crucial to the transport of peptide amphiphiles at hydrophobic interfaces which would be important for the design of peptides in biological applications.
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Affiliation(s)
- Bijin Xiong
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China.
| | - Zhenxian Chen
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China.
| | - Xiaoyan Yin
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China.
| | - Yingying Wang
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
| | - Hao Jiang
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China.
| | - Jintao Zhu
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China.
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21
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Khanal O, Kumar V, Schlegel F, Lenhoff AM. Estimating and leveraging protein diffusion on ion-exchange resin surfaces. Proc Natl Acad Sci U S A 2020; 117:7004-7010. [PMID: 32179691 PMCID: PMC7132105 DOI: 10.1073/pnas.1921499117] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Protein mobility at solid-liquid interfaces can affect the performance of applications such as bioseparations and biosensors by facilitating reorganization of adsorbed protein, accelerating molecular recognition, and informing the fundamentals of adsorption. In the case of ion-exchange chromatographic beads with small, tortuous pores, where the existence of surface diffusion is often not recognized, slow mass transfer can result in lower resin capacity utilization. We demonstrate that accounting for and exploiting protein surface diffusion can alleviate the mass-transfer limitations on multiple significant length scales. Although the surface diffusivity has previously been shown to correlate with ionic strength (IS) and binding affinity, we show that the dependence is solely on the binding affinity, irrespective of pH, IS, and resin ligand density. Different surface diffusivities give rise to different protein distributions within the resin, as characterized using confocal microscopy and small-angle neutron scattering (length scales of micrometer and nanometer, respectively). The binding dependence of surface diffusion inspired a protein-loading approach in which the binding affinity, and hence the surface diffusivity, is modulated by varying IS. Such gradient loading increased the protein uptake efficiency by up to 43%, corroborating the importance of protein surface diffusion in protein transport in ion-exchange chromatography.
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Affiliation(s)
- Ohnmar Khanal
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716
| | - Vijesh Kumar
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716
| | | | - Abraham M Lenhoff
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716;
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22
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Liu J, Tian M, Shen L. Surface effects on the degree of twist in amyloid fibril structures. Chem Commun (Camb) 2020; 56:3147-3150. [PMID: 32057047 DOI: 10.1039/c9cc10079b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Amyloid fibrils, implicated in health and diseases, commonly exhibit a periodic twist trait relevant to the structures and dynamics of the fibrils. However, the origins and modulations of fibril twist in complex in vivo environments are not yet fully understood. Here we highlight an important factor that causes twist variations in amyloid fibril structures-the presence of surrounding surfaces. Using cholesterol-containing lipid bilayers with varying cholesterol contents, we have demonstrated via atomic force microscopy that amyloid-β peptide fibrils initiated on membranes increase their average pitch size of twisting periodicity as the cholesterol content increases. These surface-induced twist variations arise from the enhanced hydrophobic interactions between the fibril and the surface distorting the torsional elastic energy of the fibril twisting as supported by a theory of an elastic model. These findings not only provide an important insight into fibril polymorphism phenomena resulting from the surface effects but also suggest a novel solution to modulate filament twisting on the nanoscale for biomaterials applications involving nanoscale features.
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Affiliation(s)
- Jingjing Liu
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430074, China.
| | - Mengting Tian
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430074, China.
| | - Lei Shen
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430074, China.
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23
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Humenik M, Preiß T, Gödrich S, Papastavrou G, Scheibel T. Functionalized DNA-spider silk nanohydrogels for controlled protein binding and release. Mater Today Bio 2020; 6:100045. [PMID: 32259099 PMCID: PMC7096766 DOI: 10.1016/j.mtbio.2020.100045] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 12/19/2022] Open
Abstract
Hydrogels are excellent scaffolds to accommodate sensitive enzymes in a protective environment. However, the lack of suitable immobilization techniques on substrates and the lack of selectivity to anchor a biocatalyst are major drawbacks preventing the use of hydrogels in bioanalytical devices. Here, nanofilm coatings on surfaces were made of a recombinant spider silk protein (rssp) to induce rssp self-assembly and thus the formation of fibril-based nanohydrogels. To functionalize spider silk nanohydrogels for bioselective binding of proteins, two different antithrombin aptamers were chemically conjugated with the rssp, thereby integrating the target-binding function into the nanohydrogel network. Human thrombin was selected as a sensitive model target, in which the structural integrity determines its activity. The chosen aptamers, which bind various exosites of thrombin, enabled selective and cooperative embedding of the protein into the nanohydrogels. The change of the aptamer secondary structure using complementary DNA sequences led to the release of active thrombin and confirmed the addressable functionalization of spider silk nanohydrogels.
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Affiliation(s)
- Martin Humenik
- Department of Biomaterials, Faculty of Engineering Science, Universität Bayreuth, Prof.-Rüdiger-Bormann.Str. 1, 95447 Bayreuth, Germany
| | - Tamara Preiß
- Department of Biomaterials, Faculty of Engineering Science, Universität Bayreuth, Prof.-Rüdiger-Bormann.Str. 1, 95447 Bayreuth, Germany
| | - Sebastian Gödrich
- Department of Physical Chemistry II, Faculty of Biology, Chemistry & Earth Sciences, Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
| | - Georg Papastavrou
- Department of Physical Chemistry II, Faculty of Biology, Chemistry & Earth Sciences, Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
- Bayreuth Center for Colloids and Interfaces (BZKG), Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
- Bavarian Polymer Institute (BPI), Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
| | - Thomas Scheibel
- Department of Biomaterials, Faculty of Engineering Science, Universität Bayreuth, Prof.-Rüdiger-Bormann.Str. 1, 95447 Bayreuth, Germany
- Bayreuth Center for Colloids and Interfaces (BZKG), Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
- Bayreuth Center for Molecular Biosciences (BZMB), Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
- Bayreuth Center for Material Science (BayMAT), Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
- Bavarian Polymer Institute (BPI), Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
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24
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Kurimitsu N, Mizuguchi C, Fujita K, Taguchi S, Ohgita T, Nishitsuji K, Shimanouchi T, Saito H. Phosphatidylethanolamine accelerates aggregation of the amyloidogenic N-terminal fragment of apoA-I. FEBS Lett 2020; 594:1443-1452. [PMID: 31968125 DOI: 10.1002/1873-3468.13737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/28/2019] [Accepted: 01/02/2020] [Indexed: 12/13/2022]
Abstract
Membrane lipid composition is known to influence aggregation and fibril formation of many amyloidogenic proteins. Here, we found that phosphatidylethanolamine (PE) accelerates aggregation of the N-terminal 1-83 fragment of an amyloidogenic G26R variant of apoA-I on lipid membranes. Circular dichroism and isothermal titration calorimetry measurements demonstrated that PE does not affect the α-helical structure and lipid binding property of apoA-I 1-83/G26R. Rather, fluorescence measurements indicated that PE induces more ordered lipid packing at the interfacial and acyl chain regions, providing more hydrophobic environments especially around the highly amyloidogenic regions in apoA-I on the membrane surface. These results suggest that PE promotes aggregation of the amyloidogenic N-terminal fragment of apoA-I on lipid membranes by inducing hydrophobic membrane environments.
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Affiliation(s)
- Naoko Kurimitsu
- Department of Biophysical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Chiharu Mizuguchi
- Department of Biophysical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Kaho Fujita
- Department of Biophysical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Suzuno Taguchi
- Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Takashi Ohgita
- Department of Biophysical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
| | | | - Toshinori Shimanouchi
- Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Hiroyuki Saito
- Department of Biophysical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
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25
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Computational studies of protein aggregation mediated by amyloid: Fibril elongation and secondary nucleation. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2020; 170:461-504. [DOI: 10.1016/bs.pmbts.2019.12.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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26
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Khan MAI, Weininger U, Kjellström S, Deep S, Akke M. Adsorption of unfolded Cu/Zn superoxide dismutase onto hydrophobic surfaces catalyzes its formation of amyloid fibrils. Protein Eng Des Sel 2019; 32:77-85. [PMID: 31832682 DOI: 10.1093/protein/gzz033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 07/02/2019] [Accepted: 07/07/2019] [Indexed: 11/12/2022] Open
Abstract
Intracellular aggregates of superoxide dismutase 1 (SOD1) are associated with amyotrophic lateral sclerosis. In vivo, aggregation occurs in a complex and dense molecular environment with chemically heterogeneous surfaces. To investigate how SOD1 fibril formation is affected by surfaces, we used an in vitro model system enabling us to vary the molecular features of both SOD1 and the surfaces, as well as the surface area. We compared fibril formation in hydrophilic and hydrophobic sample wells, as a function of denaturant concentration and extraneous hydrophobic surface area. In the presence of hydrophobic surfaces, SOD1 unfolding promotes fibril nucleation. By contrast, in the presence of hydrophilic surfaces, increasing denaturant concentration retards the onset of fibril formation. We conclude that the mechanism of fibril formation depends on the surrounding surfaces and that the nucleating species might correspond to different conformational states of SOD1 depending on the nature of these surfaces.
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Affiliation(s)
- Mohammad Ashhar I Khan
- Biophysical Chemistry, Department of Chemistry, Center for Molecular Protein Science, Lund University, P.O. Box 124, 221 00, Lund, Sweden.,Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Ulrich Weininger
- Biophysical Chemistry, Department of Chemistry, Center for Molecular Protein Science, Lund University, P.O. Box 124, 221 00, Lund, Sweden
| | - Sven Kjellström
- Biochemistry and Structural Biology, Department of Chemistry, Center for Molecular Protein Science, Lund University, P.O. Box 124, 221 00, Lund, Sweden
| | - Shashank Deep
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Mikael Akke
- Biophysical Chemistry, Department of Chemistry, Center for Molecular Protein Science, Lund University, P.O. Box 124, 221 00, Lund, Sweden
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27
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Kinetic study of Aβ(1-42) amyloidosis in the presence of ganglioside-containing vesicles. Colloids Surf B Biointerfaces 2019; 185:110615. [PMID: 31707229 DOI: 10.1016/j.colsurfb.2019.110615] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/21/2019] [Accepted: 10/25/2019] [Indexed: 12/21/2022]
Abstract
Alzheimer's disease (AD) is characterized by the amyloid-beta peptide (Aβ) misfolding to form aberrant amyloid aggregates in the brain. Although recent evidence implicates that amyloid deposition in vivo is highly related to biomembranes, how the characteristic lipid components of neuronal membranes mediate this process remains to be fully elucidated. Herein, we established vesicle models to mimic exosomes and investigated their influence on the kinetics of Aβ(1-42) amyloidosis. By using ternary vesicles composed of three brain lipids monosialoganglioside GM1, cholesterol and sphingomyelin, we found that GM1 could regulate peptide fibrillation by facilitating the conformational transition of Aβ(1-42), and further quantitatively analyzed the influence of GM1-containing vesicles on the kinetics of Aβ(1-42) fibrillation. In addition, GM1-containing vesicles induced the formation of Aβ(1-42) fibrils at low concentrations, and these fibrils were toxic to PC12 cells. By analyzing the role of GM1 in this ternary mixture of membranes at the molecular level, we confirmed that GM1 clusters are presented as attachment sites for peptides, thus promoting the fibrillation of Aβ(1-42).
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28
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29
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Srivastava AK, Pittman JM, Zerweck J, Venkata BS, Moore PC, Sachleben JR, Meredith SC. β-Amyloid aggregation and heterogeneous nucleation. Protein Sci 2019; 28:1567-1581. [PMID: 31276610 PMCID: PMC6699094 DOI: 10.1002/pro.3674] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 06/26/2019] [Accepted: 07/03/2019] [Indexed: 01/09/2023]
Abstract
In this article, we consider the role of heterogeneous nucleation in β-amyloid aggregation. Heterogeneous nucleation is more common and occurs at lower levels of supersaturation than homogeneous nucleation. The nucleation period is also the stage at which most of the polymorphism of amyloids arises, this being one of the defining features of amyloids. We focus on several well-known heterogeneous nucleators of β-amyloid, including lipid surfaces, especially those enriched in gangliosides and cholesterol, and divalent metal ions. These two broad classes of nucleators affect β-amyloid particularly in light of the amphiphilicity of these peptides: the N-terminal region, which is largely polar and charged, contains the metal binding site, whereas the C-terminal region is aliphatic and is important in lipid binding. Notably, these two classes of nucleators can interact cooperatively, aggregation begetting greater aggregation.
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Affiliation(s)
- Atul K. Srivastava
- Department of PathologyThe University of ChicagoChicagoIllinois
- Department of Biochemistry and Molecular BiologyThe University of ChicagoChicagoIllinois
| | - Jay M. Pittman
- Department of Biochemistry and Molecular BiologyThe University of ChicagoChicagoIllinois
| | - Jonathan Zerweck
- Department of PathologyThe University of ChicagoChicagoIllinois
- Department of Biochemistry and Molecular BiologyThe University of ChicagoChicagoIllinois
| | - Bharat S. Venkata
- Department of PathologyThe University of ChicagoChicagoIllinois
- Department of Biochemistry and Molecular BiologyThe University of ChicagoChicagoIllinois
| | | | | | - Stephen C. Meredith
- Department of PathologyThe University of ChicagoChicagoIllinois
- Department of Biochemistry and Molecular BiologyThe University of ChicagoChicagoIllinois
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30
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Influence of crowding and surfaces on protein amyloidogenesis: A thermo-kinetic perspective. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2019; 1867:941-953. [PMID: 30928692 DOI: 10.1016/j.bbapap.2019.03.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 03/22/2019] [Accepted: 03/23/2019] [Indexed: 01/24/2023]
Abstract
The last few decades have irreversibly implicated protein self-assembly and aggregation leading to amyloid fibril formation in proteopathies that include several neurodegenerative diseases. Emerging studies recognize the importance of eliciting the pathways leading to protein aggregation in the context of the crowded intracellular environment rather than in conventional in vitro conditions. It is found that crowded environments can have acceleratory as well as inhibitory effects on protein aggregation, depending on the interplay of underlying factors on the crucial rate limiting steps. The aggregation mechanism and transient species formed along the pathway are further altered when they interface with natural and artificial surfaces in the cellular milieu. An increasing number of studies probe the autocatalytic nature of amyloid surfaces as well as membrane bilayer effects on amyloidogenesis. Moreover, exposure to modern nanosurfaces via nanomedicines and other sources potentially invokes beneficial or deleterious biological response that needs rigorous investigation. Mounting evidences indicate that nanoparticles can either promote or impede amyloid aggregation, spurring efforts to tune their interactions for developing effective anti-amyloid strategies. Mechanistic insights into nanoparticle mediated aggregation pathways are therefore crucial for engineering anti-amyloid nanoparticle strategies that are biocompatible and sustainable. This review is a compilation of studies that contribute to the current understanding of the altering effects of molecular crowding as well as natural and artificial surfaces on protein amyloidogenesis.
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31
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Hajiraissi R, Hanke M, Gonzalez Orive A, Duderija B, Hofmann U, Zhang Y, Grundmeier G, Keller A. Effect of Terminal Modifications on the Adsorption and Assembly of hIAPP(20-29). ACS OMEGA 2019; 4:2649-2660. [PMID: 31459500 PMCID: PMC6649277 DOI: 10.1021/acsomega.8b03028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 01/22/2019] [Indexed: 06/10/2023]
Abstract
The assembly of peptides and proteins into nanoscale amyloid fibrils via formation of intermolecular β-sheets not only plays an important role in the development of degenerative diseases but also represents a promising approach for the synthesis of functional nanomaterials. In many biological and technological settings, peptide assembly occurs in the presence of organic and inorganic interfaces with different physicochemical properties. In an attempt to dissect the relative contributions of the different molecular interactions governing amyloid assembly at interfaces, we here present a systematic study of the effects of terminal modifications on the adsorption and assembly of the human islet amyloid polypeptide fragment hIAPP(20-29) at organic self-assembled monolayers (SAMs) presenting different functional groups (cationic, anionic, polar, or hydrophobic). Using a selection of complementary in situ and ex situ analytical techniques, we find that even this well-defined and comparatively simple model system is governed by a rather complex interplay of electrostatic interactions, hydrophobic interactions, and hydrogen bonding, resulting in a plethora of observations and dependencies, some of which are rather counterintuitive. In particular, our results demonstrate that terminal modifications can have tremendous effects on peptide adsorption and assembly dynamics, as well as aggregate morphology and molecular structure. The effects exerted by the terminal modifications can furthermore be modulated in nontrivial ways by the physicochemical properties of the SAM surface. Therefore, terminal modifications are an important factor to consider when conducting and comparing peptide adsorption and aggregation studies and may represent an additional parameter for guiding the assembly of peptide-based nanomaterials.
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Affiliation(s)
- Roozbeh Hajiraissi
- Technical
and Macromolecular Chemistry, Paderborn
University, Warburger Str. 100, 33098 Paderborn, Germany
| | - Marcel Hanke
- Technical
and Macromolecular Chemistry, Paderborn
University, Warburger Str. 100, 33098 Paderborn, Germany
| | - Alejandro Gonzalez Orive
- Technical
and Macromolecular Chemistry, Paderborn
University, Warburger Str. 100, 33098 Paderborn, Germany
| | - Belma Duderija
- Technical
and Macromolecular Chemistry, Paderborn
University, Warburger Str. 100, 33098 Paderborn, Germany
| | - Ulrike Hofmann
- B
CUBE—Center for Molecular Bioengineering, Technische Universität Dresden, Arnoldstr. 18, 01307 Dresden, Germany
| | - Yixin Zhang
- B
CUBE—Center for Molecular Bioengineering, Technische Universität Dresden, Arnoldstr. 18, 01307 Dresden, Germany
| | - Guido Grundmeier
- Technical
and Macromolecular Chemistry, Paderborn
University, Warburger Str. 100, 33098 Paderborn, Germany
| | - Adrian Keller
- Technical
and Macromolecular Chemistry, Paderborn
University, Warburger Str. 100, 33098 Paderborn, Germany
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32
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Abstract
Abstract
Inhibition of amyloid β peptide (Aβ) aggregation is an important goal due to the connection of this process with Alzheimer’s disease. Traditionally, inhibitors were developed with an aim to retard the overall macroscopic aggregation. However, recent advances imply that approaches based on mechanistic insights may be more powerful. In such approaches, the microscopic steps underlying the aggregation process are identified, and it is established which of these step(s) lead to neurotoxicity. Inhibitors are then derived to specifically target steps involved in toxicity. The Aβ aggregation process is composed of at minimum three microscopic steps: primary nucleation of monomers only, secondary nucleation of monomers on fibril surface, and elongation of fibrils by monomer addition. The vast majority of toxic species are generated from the secondary nucleation process: this may be a key process to inhibit in order to limit toxicity. Inhibition of primary nucleation, which delays the emergence of toxic species without affecting their total concentration, may also be effective. Inhibition of elongation may instead increase the toxicity over time. Here we briefly review findings regarding secondary nucleation of Aβ, its dominance over primary nucleation, and attempts to derive inhibitors that specifically target secondary nucleation with an aim to limit toxicity.
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Affiliation(s)
- Sara Linse
- Lund University , Department of Biochemistry and Structural Biology , P.O. Box 124 , 221 00 Lund , Sweden
- Lund University , NanoLund , Lund , Sweden
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33
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Gong S, Liu J, Tian M, Wang K, Cai S, Wang W, Shen L. Unravelling the mechanism of amyloid-β peptide oligomerization and fibrillation at chiral interfaces. Chem Commun (Camb) 2019; 55:13725-13728. [DOI: 10.1039/c9cc06980a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The mechanism of how surface chirality affects amyloid-β peptide oligomerization and fibrillation was firstly unravelled at the molecular level.
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Affiliation(s)
- Shuai Gong
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan 430074
- China
| | - Jingjing Liu
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan 430074
- China
| | - Mengting Tian
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan 430074
- China
| | - Kang Wang
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan 430074
- China
| | - Shali Cai
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan 430074
- China
| | - Weiyan Wang
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan 430074
- China
| | - Lei Shen
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan 430074
- China
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34
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Li C, Qin R, Liu R, Miao S, Yang P. Functional amyloid materials at surfaces/interfaces. Biomater Sci 2018; 6:462-472. [PMID: 29435550 DOI: 10.1039/c7bm01124e] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
With the development of nanotechnology, functional amyloid materials are drawing increasing attention, and numerous remarkable applications are emerging. Amyloids, defined as a class of supramolecular assemblies of misfolded proteins or peptides into β-sheet fibrils, have evolved in many new respects and offer abundant chemical/biological functions. These proteinaceous micro/nano-structures provide excellent biocompatibility, rich phase behaviours, strong mechanical properties, and stability at interfaces not only in nature but also in functional materials, displaying versatile interactions with surfaces/interfaces that have been widely adopted in bioadhesion, synthetic biology, and composites. Overall, functional amyloids at surfaces/interfaces have excellent potential applications in next-generation biotechnology and biomaterials.
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Affiliation(s)
- Chen Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Xi'an 710119, China.
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35
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Yang M, Wang K, Lin J, Wang L, Wei F, Zhu J, Zheng W, Shen L. Gel Phase Membrane Retards Amyloid β-Peptide (1-42) Fibrillation by Restricting Slaved Diffusion of Peptides on Lipid Bilayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8408-8414. [PMID: 29925241 DOI: 10.1021/acs.langmuir.8b01315] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Plasma membranes in the human brain can interact with amyloid β-peptide (1-42; Aβ42) and induce Aβ42 fibrillation, which is considered to be a crucial process underlying the neurotoxicity of Aβ42 and the pathogenesis of Alzheimer's disease (AD). However, the mechanism of membrane-mediated Aβ42 fibrillation at the molecular level remains elusive. Here we study the role of adsorbed Aβ42 peptides on membrane-mediated fibrillation using supported lipid bilayers of varying phase structures (gel and fluid). Using total internal reflection fluorescence microscopy and interfacial specific second-order nonlinear optical spectroscopy, we show that the dynamics of 2D-mobile Aβ42 molecules, facilitated by the highly mobile lipids underneath the peptides, are critical to Aβ42 fibrillation on liquid phase membranes. This growth mechanism is retarded on gel phase membranes where the dynamics of 2D-mobile peptides are restricted by the "frozen" lipids with less mobility.
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Affiliation(s)
- Mengting Yang
- School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology , Wuhan 430070 , China
| | - Kang Wang
- School of Chemistry, Chemical Engineering and Life Science , Wuhan University of Technology , Wuhan 430074 , China
| | - Jiake Lin
- School of Chemistry, Chemical Engineering and Life Science , Wuhan University of Technology , Wuhan 430074 , China
| | - Liqun Wang
- Institute for Interdisciplinary Research & Key Laboratory of Optoelectronic Chemical Materials and Devices of Education , Jianghan University , Wuhan 430056 , China
| | - Feng Wei
- Institute for Interdisciplinary Research & Key Laboratory of Optoelectronic Chemical Materials and Devices of Education , Jianghan University , Wuhan 430056 , China
| | - Jintao Zhu
- School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology , Wuhan 430070 , China
| | - Wanquan Zheng
- Institute for Interdisciplinary Research & Key Laboratory of Optoelectronic Chemical Materials and Devices of Education , Jianghan University , Wuhan 430056 , China
- Institute des Sciences Moléculaires d'Orsay, Université Paris-Sud , 91405 Orsay Cedex , France
| | - Lei Shen
- School of Chemistry, Chemical Engineering and Life Science , Wuhan University of Technology , Wuhan 430074 , China
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36
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Lin YC, Li C, Fakhraai Z. Kinetics of Surface-Mediated Fibrillization of Amyloid-β (12-28) Peptides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:4665-4672. [PMID: 29584444 DOI: 10.1021/acs.langmuir.7b02744] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Surfaces or interfaces are considered to be key factors in facilitating the formation of amyloid fibrils under physiological conditions. In this report, we study the kinetics of the surface-mediated fibrillization (SMF) of an amyloid-β fragment (Aβ12-28) on mica. We employ a spin-coating-based drying procedure to control the exposure time of the substrate to a low-concentration peptide solution and then monitor the fibril growth as a function of time via atomic force microscopy (AFM). The evolution of surface-mediated fibril growth is quantitatively characterized in terms of the length histogram of imaged fibrils and their surface concentration. A two-dimensional (2D) kinetic model is proposed to numerically simulate the length evolution of surface-mediated fibrils by assuming a diffusion-limited aggregation (DLA) process along with size-dependent rate constants. We find that both monomer and fibril diffusion on the surface are required to obtain length histograms as a function of time that resemble those observed in experiments. The best-fit simulated data can accurately describe the key features of experimental length histograms and suggests that the mobility of loosely bound amyloid species is crucial in regulating the kinetics of SMF. We determine that the mobility exponent for the size dependence of the DLA rate constants is α = 0.55 ± 0.05, which suggests that the diffusion of loosely bound surface fibrils roughly depends on the inverse of the square root of their size. These studies elucidate the influence of deposition rate and surface diffusion on the formation of amyloid fibrils through SMF. The method used here can be broadly adopted to study the diffusion and aggregation of peptides or proteins on various surfaces to investigate the role of chemical interactions in two-dimensional fibril formation and diffusion.
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Affiliation(s)
- Yi-Chih Lin
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States
| | - Chen Li
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States
| | - Zahra Fakhraai
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States
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37
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Effect of Phosphatidylserine and Cholesterol on Membrane-mediated Fibril Formation by the N-terminal Amyloidogenic Fragment of Apolipoprotein A-I. Sci Rep 2018; 8:5497. [PMID: 29615818 PMCID: PMC5882889 DOI: 10.1038/s41598-018-23920-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 03/22/2018] [Indexed: 01/31/2023] Open
Abstract
Here, we examined the effects of phosphatidylserine (PS) and cholesterol on the fibril-forming properties of the N-terminal 1‒83 fragment of an amyloidogenic G26R variant of apoA-I bound to small unilamellar vesicles. A thioflavin T fluorescence assay together with microscopic observations showed that PS significantly retards the nucleation step in fibril formation by apoA-I 1‒83/G26R, whereas cholesterol slightly enhances fibril formation. Circular dichroism analyses demonstrated that PS facilitates a structural transition from random coil to α-helix in apoA-I 1‒83/G26R with great stabilization of the α-helical structure upon lipid binding. Isothermal titration calorimetry measurements revealed that PS induces a marked increase in capacity for binding of apoA-I 1‒83/G26R to the membrane surface, perhaps due to electrostatic interactions of positively charged amino acids in apoA-I with PS. Such effects of PS to enhance lipid interactions and inhibit fibril formation of apoA-I were also observed for the amyloidogenic region-containing apoA-I 8‒33/G26R peptide. Fluorescence measurements using environment-sensitive probes indicated that PS induces a more solvent-exposed, membrane-bound conformation in the amyloidogenic region of apoA-I without affecting membrane fluidity. Since cell membranes have highly heterogeneous lipid compositions, our findings may provide a molecular basis for the preferential deposition of apoA-I amyloid fibrils in tissues and organs.
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38
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Hajiraissi R, Hanke M, Yang Y, Duderija B, Gonzalez Orive A, Grundmeier G, Keller A. Adsorption and Fibrillization of Islet Amyloid Polypeptide at Self-Assembled Monolayers Studied by QCM-D, AFM, and PM-IRRAS. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3517-3524. [PMID: 29489382 DOI: 10.1021/acs.langmuir.7b03626] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Aggregation and fibrillization of human islet amyloid polypeptide (hIAPP) plays an important role in the development of type 2 diabetes mellitus. Understanding the interaction of hIAPP with interfaces such as cell membranes at a molecular level therefore represents an important step toward new therapies. Here, we investigate the fibrillization of hIAPP at different self-assembled alkanethiol monolayers (SAMs) by quartz crystal microbalance with dissipation monitoring (QCM-D), atomic force microscopy (AFM), and polarization-modulated infrared reflection absorption spectroscopy (PM-IRRAS). We find that hydrophobic interactions with the CH3-terminated SAM tend to retard hIAPP fibrillization compared to the carboxylic acid-terminated SAM where attractive electrostatic interactions lead to the formation of a three-dimensional network of interwoven fibrils. At the hydroxyl- and amino-terminated SAMs, fibrillization appears to be governed by hydrogen bonding between the peptide and the terminating groups which may even overcome electrostatic repulsion. These results thus provide fundamental insights into the molecular mechanisms governing amyloid assembly at interfaces.
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Affiliation(s)
- Roozbeh Hajiraissi
- Technical and Macromolecular Chemistry , Paderborn University , Warburger Str. 100 , 33098 Paderborn , Germany
| | - Marcel Hanke
- Technical and Macromolecular Chemistry , Paderborn University , Warburger Str. 100 , 33098 Paderborn , Germany
| | - Yu Yang
- Technical and Macromolecular Chemistry , Paderborn University , Warburger Str. 100 , 33098 Paderborn , Germany
| | - Belma Duderija
- Technical and Macromolecular Chemistry , Paderborn University , Warburger Str. 100 , 33098 Paderborn , Germany
| | - Alejandro Gonzalez Orive
- Technical and Macromolecular Chemistry , Paderborn University , Warburger Str. 100 , 33098 Paderborn , Germany
| | - Guido Grundmeier
- Technical and Macromolecular Chemistry , Paderborn University , Warburger Str. 100 , 33098 Paderborn , Germany
| | - Adrian Keller
- Technical and Macromolecular Chemistry , Paderborn University , Warburger Str. 100 , 33098 Paderborn , Germany
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39
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Wang J, Yuan C, Han Y, Wang Y, Liu X, Zhang S, Yan X. Trace Water as Prominent Factor to Induce Peptide Self-Assembly: Dynamic Evolution and Governing Interactions in Ionic Liquids. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1702175. [PMID: 28976074 DOI: 10.1002/smll.201702175] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 08/12/2017] [Indexed: 05/22/2023]
Abstract
The interaction between water and biomolecules including peptides is of critical importance for forming high-level architectures and triggering life's functions. However, the bulk aqueous environment has limitations in detecting the kinetics and mechanisms of peptide self-assembly, especially relating to interactions of trace water. With ionic liquids (ILs) as a nonconventional medium, herein, it is discovered that trace amounts of water play a decisive role in triggering self-assembly of a biologically derived dipeptide. ILs provide a suitable nonaqueous environment, enabling us to mediate water content and follow the dynamic evolution of peptide self-assembly. The trace water is found to be involved in the assembly process of dipeptide, especially leading to the formation of stable noncovalent dipeptide oligomers in the early stage of nucleation, as evident by both experimental studies and theoretical simulations. The thermodynamics of the growth process is mainly governed by a synergistic effect of hydrophobic interaction and hydrogen bonds. Each step of assembly presents a different trend in thermodynamic energy. The dynamic evolution of assembly process can be efficiently mediated by changing trace water content. The decisive role of trace water in triggering and mediating self-assembly of biomolecules provides a new perspective in understanding supramolecular chemistry and molecular self-organization in biology.
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Affiliation(s)
- Juan Wang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
- Center for Mesoscience, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Chengqian Yuan
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
- Center for Mesoscience, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yuchun Han
- Key Laboratory of Colloid and Interface Science, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yilin Wang
- Key Laboratory of Colloid and Interface Science, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xiaomin Liu
- Center for Mesoscience, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Suojiang Zhang
- Center for Mesoscience, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xuehai Yan
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
- Center for Mesoscience, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
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40
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Gao G, Zhang M, Gong D, Chen R, Hu X, Sun T. The size-effect of gold nanoparticles and nanoclusters in the inhibition of amyloid-β fibrillation. NANOSCALE 2017; 9:4107-4113. [PMID: 28276561 DOI: 10.1039/c7nr00699c] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A significant pathological signature of Alzheimer's disease (AD) is the deposition of amyloid-β (Aβ) plaques in the brain and the synaptic dysfunction and neurodegeneration associated with it. Compounds or drugs that inhibit Aβ fibrillation are thus desirable to develop novel therapeutic strategies against AD. Conventional strategies usually require an elaborate design of their molecular structures. Here we report the size-effect of gold nanoparticles (AuNPs) and nanoclusters (AuNCs) in the inhibition of protein amyloidosis. Using l-glutathione stabilized AuNPs with different sizes and AuNCs as examples, we show that large AuNPs accelerate Aβ fibrillation, whereas small AuNPs significantly suppress this process. More interestingly, AuNCs with smaller sizes can completely inhibit amyloidosis. Dynamic light scattering (DLS) experiments show that AuNCs can efficiently prevent Aβ peptides from aggregation to larger oligomers (e.g. micelles) and thus avoid nucleation to form fibrils. This is crucially important for developing novel AD therapies because oligomers are the main source of Aβ toxicity. This work presents a novel strategy to design anti-amyloidosis drugs, which also provides interesting insights to understand how biological nanostructures participate in vivo in Aβ fibrillation from a new perspective.
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Affiliation(s)
- Guanbin Gao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, People's Republic of China.
| | - Mingxi Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, People's Republic of China.
| | - Dejun Gong
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, People's Republic of China.
| | - Rui Chen
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, People's Republic of China.
| | - Xuejiao Hu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, People's Republic of China.
| | - Taolei Sun
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, People's Republic of China. and School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, People's Republic of China.
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41
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Lin YC, Repollet-Pedrosa MH, Ferrie JJ, Petersson EJ, Fakhraai Z. Potential Artifacts in Sample Preparation Methods Used for Imaging Amyloid Oligomers and Protofibrils due to Surface-Mediated Fibril Formation. J Phys Chem B 2017; 121:2534-2542. [PMID: 28266853 DOI: 10.1021/acs.jpcb.6b12560] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Accurate imaging of nanometer-sized structures and morphologies is essential to characterizing amyloid species formed at various stages of amyloid aggregation. In this article, we examine the effect of different drying procedures on the final morphology of surface-mediated fibrils formed during the incubation period, which may then be mistaken as oligomers or protofibrils intentionally formed in solution for a particular study. Atomic force microscopy results show that some artifacts, such as globules, flakelike structures, and even micrometer-long fibrils, can be produced under various drying conditions. We also demonstrate that one can prevent drying artifacts by using an appropriate spin-coating procedure to dry amyloid samples. This procedure can bypass the wetting/dewetting transition of the liquid layer during the drying process and preserve the structure of interest on the substrate without generating drying artifacts.
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Affiliation(s)
- Yi-Chih Lin
- Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Milton H Repollet-Pedrosa
- Department of Chemistry, University of Wisconsin at Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - John J Ferrie
- Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - E James Petersson
- Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Zahra Fakhraai
- Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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42
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Balaraj VS, Zeng PCH, Sanford SP, McBride SA, Raghunandan A, Lopez JM, Hirsa AH. Surface shear viscosity as a macroscopic probe of amyloid fibril formation at a fluid interface. SOFT MATTER 2017; 13:1780-1787. [PMID: 28177017 DOI: 10.1039/c6sm01831a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Amyloidogenesis of proteins is of wide interest because amyloid structures are associated with many diseases, including Alzheimer's and type II diabetes. Dozens of different proteins of various sizes are known to form amyloid fibrils. While there are numerous studies on the fibrillization of insulin induced by various perturbations, shearing at fluid interfaces has not received as much attention. Here, we present a study of human insulin fibrillization at room temperature using a deep-channel surface viscometer. The hydrodynamics of the bulk flow equilibrates in just over a minute, but the proteins at the air-water interface exhibit a very slow development during which the surface (excess) shear viscosity deduced from a Newtonian surface model increases slightly over a period of a day and a half. Then, there is a very rapid increase in the surface shear viscosity to effectively unbounded levels as the interface becomes immobilized. Atomic force microscopy shows that fibrils appear at the interface after it becomes immobilized. Fibrillization in the bulk does not occur until much later. This has been verified by concurrent atomic force microscopy and circular dichroism spectroscopy of samples from the bulk. The immobilized interface has zero in-plane shear rate, however due to the bulk flow, there is an increase in the strength of the normal component of the shear rate at the interface, implicating this component of shear in the fibrillization process ultimately resulting in a thick weave of fibrils on the interface. Real-time detection of fibrillization via interfacial rheology may find utility in other studies of proteins at sheared interfaces.
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Affiliation(s)
- Vignesh S Balaraj
- Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA.
| | - Philip C H Zeng
- Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA. and Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA
| | - Sean P Sanford
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA
| | - Samantha A McBride
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA
| | - Aditya Raghunandan
- Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA.
| | - Juan M Lopez
- School of Mathematical and Statistical Sciences, Arizona State Univ., Tempe AZ, 85287, USA
| | - Amir H Hirsa
- Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA. and Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA
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43
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Soltani N, Gholami MR. Increase in the β-Sheet Character of an Amyloidogenic Peptide upon Adsorption onto Gold and Silver Surfaces. Chemphyschem 2017; 18:526-536. [DOI: 10.1002/cphc.201601000] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 12/23/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Nima Soltani
- Department of Chemistry; Sharif University of Technology; Tehran 11365-11155 Iran), Fax: (+98) 216 600 5718
| | - Mohammad Reza Gholami
- Department of Chemistry; Sharif University of Technology; Tehran 11365-11155 Iran), Fax: (+98) 216 600 5718
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44
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Lu Q, Tang Q, Xiong Y, Qing G, Sun T. Protein/Peptide Aggregation and Amyloidosis on Biointerfaces. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E740. [PMID: 28773858 PMCID: PMC5457079 DOI: 10.3390/ma9090740] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 08/12/2016] [Accepted: 08/25/2016] [Indexed: 12/27/2022]
Abstract
Recently, studies of protein/peptide aggregation, particularly the amyloidosis, have attracted considerable attention in discussions of the pathological mechanisms of most neurodegenerative diseases. The protein/peptide aggregation processes often occur at the membrane-cytochylema interface in vivo and behave differently from those occurring in bulk solution, which raises great interest to investigate how the interfacial properties of artificial biomaterials impact on protein aggregation. From the perspective of bionics, current progress in this field has been obtained mainly from four aspects: (1) hydrophobic-hydrophilic interfaces; (2) charged surface; (3) chiral surface; and (4) biomolecule-related interfaces. The specific physical and chemical environment provided by these interfaces is reported to strongly affect the adsorption of proteins, transition of protein conformation, and diffusion of proteins on the biointerface, all of which are ultimately related to protein assembly. Meanwhile, these compelling results of in vitro experiments can greatly promote the development of early diagnostics and therapeutics for the relevant neurodegenerative diseases. This paper presents a brief review of these appealing studies, and particular interests are placed on weak interactions (i.e., hydrogen bonding and stereoselective interactions) that are also non-negligible in driving amyloid aggregation at the interfaces. Moreover, this paper also proposes the future perspectives, including the great opportunities and challenges in this field as well.
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Affiliation(s)
- Qi Lu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
| | - Qiuhan Tang
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
| | - Yuting Xiong
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
| | - Guangyan Qing
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
| | - Taolei Sun
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
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45
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Shezad K, Zhang K, Hussain M, Dong H, He C, Gong X, Xie X, Zhu J, Shen L. Surface Roughness Modulates Diffusion and Fibrillation of Amyloid-β Peptide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:8238-8244. [PMID: 27466062 DOI: 10.1021/acs.langmuir.6b01756] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The presence of surfaces influences the kinetics of amyloid-β (Aβ) peptide fibrillation. Although it has been generally recognized that the fibrillation process can be assisted or accelerated by surface chemistry, the impact of surface topography, i.e., roughness, on peptide fibrillation is relatively little understood. Here we study the role of surface roughness on surface-mediated fibrillation using polymer coatings of varying roughness as well as polymer microparticles. Using single-molecule tracking, atomic force microscopy, and the thioflavin T fluorescence technique, we show that a rough surface decelerates the two-dimensional (2D) diffusion of peptides and retards the surface-mediated fibrillation. A higher degree of roughness that presents an obstacle to peptide diffusion is found to inhibit the fibrillation process.
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Affiliation(s)
- Khurram Shezad
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Kejun Zhang
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Mubashir Hussain
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Hai Dong
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Chuanxin He
- College of Chemistry and Environmental Engineering, Shenzhen University , Shenzhen 518060, China
| | - Xiangjun Gong
- School of Materials Science and Engineering, South China University of Technology , Guangzhou 510640, China
| | - Xiaolin Xie
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Jintao Zhu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Lei Shen
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
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46
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Liao HS, Lin J, Liu Y, Huang P, Jin A, Chen X. Self-assembly mechanisms of nanofibers from peptide amphiphiles in solution and on substrate surfaces. NANOSCALE 2016; 8:14814-20. [PMID: 27447093 PMCID: PMC5226416 DOI: 10.1039/c6nr04672j] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We report the investigation of the self-assembly mechanism of nanofibers, using a small peptide amphiphile (NapFFKYp) as a model. Combining experimental and simulation methods, we identify the self-assembly pathways in the solution and on the substrates, respectively. In the solution, peptide amphiphiles undergo the nucleation process to grow into nanofibers. The nanofibers can further twist into high-ordered nanofibers with aging. On the substrates, peptide amphiphiles form nanofibers and nanosheet structures simultaneously. This surface-induced nanosheet consists of rod-like structures, and its thickness is substrate-dependent. Most intriguingly, water can transform the nanosheet into the nanofiber. Molecular dynamic simulation suggests that hydrophobic and ion-ion interactions are dominant forces during the self-assembly process.
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Affiliation(s)
- Hsien-Shun Liao
- Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan and Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health, Bethesda, Maryland 20892, USA. and Laboratory of Cellular Imaging and Macromolecular Biophysics, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health, Bethesda, Maryland 20892, USA.
| | - Jing Lin
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Yang Liu
- Fitzpatrick Institute for Photonics, Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Peng Huang
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Albert Jin
- Laboratory of Cellular Imaging and Macromolecular Biophysics, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health, Bethesda, Maryland 20892, USA.
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health, Bethesda, Maryland 20892, USA.
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47
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Liu L, Li Q, Zhang S, Wang X, Hoffmann SV, Li J, Liu Z, Besenbacher F, Dong M. Identification of a Novel Parallel β-Strand Conformation within Molecular Monolayer of Amyloid Peptide. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2016; 3:1500369. [PMID: 27818898 PMCID: PMC5071675 DOI: 10.1002/advs.201500369] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 02/15/2016] [Indexed: 05/27/2023]
Abstract
The differentiation of protein properties and biological functions arises from the variation in the primary and secondary structure. Specifically, in abnormal assemblies of protein, such as amyloid peptide, the secondary structure is closely correlated with the stable ensemble and the cytotoxicity. In this work, the early Aβ33-42 aggregates forming the molecular monolayer at hydrophobic interface are investigated. The molecular monolayer of amyloid peptide Aβ33-42 consisting of novel parallel β-strand-like structure is further revealed by means of a quantitative nanomechanical spectroscopy technique with force controlled in pico-Newton range, combining with molecular dynamic simulation. The identified parallel β-strand-like structure of molecular monolayer is distinct from the antiparallel β-strand structure of Aβ33-42 amyloid fibril. This finding enriches the molecular structures of amyloid peptide aggregation, which could be closely related to the pathogenesis of amyloid disease.
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Affiliation(s)
- Lei Liu
- Institute for Advanced Materials Jiangsu University Zhenjiang 212013 P. R. China; Interdisciplinary Nanoscience Center (iNANO) Aarhus University Aarhus CDK-8000 Denmark
| | - Qiang Li
- Interdisciplinary Nanoscience Center (iNANO) Aarhus University Aarhus C DK-8000 Denmark
| | - Shuai Zhang
- Interdisciplinary Nanoscience Center (iNANO) Aarhus University Aarhus C DK-8000 Denmark
| | - Xiaofeng Wang
- Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China
| | | | - Jingyuan Li
- Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Zheng Liu
- Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Singapore Singapore 639798 Singapore
| | - Flemming Besenbacher
- Interdisciplinary Nanoscience Center (iNANO) Aarhus University Aarhus C DK-8000 Denmark
| | - Mingdong Dong
- Interdisciplinary Nanoscience Center (iNANO) Aarhus University Aarhus C DK-8000 Denmark
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48
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Barz B, Strodel B. Understanding Amyloid-β Oligomerization at the Molecular Level: The Role of the Fibril Surface. Chemistry 2016; 22:8768-72. [PMID: 27135646 DOI: 10.1002/chem.201601701] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Indexed: 12/11/2022]
Abstract
The aggregation of the amyloid β-peptide into fibrils is a complex process that involves mechanisms such as primary and secondary nucleation, fibril elongation and fibril fragmentation. Some of these processes generate neurotoxic Aβ oligomers, which are involved in the development of Alzheimer's disease. Recent experimental studies have emphasized the role of the fibril as a catalytic surface for the production of highly toxic oligomers during secondary nucleation. By using molecular dynamics simulations, we show that it is the hydrophobic fibril region that causes the structural changes required for catalyzing the formation of β-sheet-rich Aβ1-42 oligomers on the fibril surface. These results reveal, for the first time, the molecular basis of the secondary nucleation pathway.
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Affiliation(s)
- Bogdan Barz
- Institute of Complex Systems: Structural Biochemistry (ICS-6), Forschungszentrum Jülich GmbH, 52425, Jülich, Germany
| | - Birgit Strodel
- Institute of Theoretical and Computational Chemistry, Heinrich Heine University Düsseldorf, Universitätstrasse 1, 40225, Düsseldorf, Germany. , .,Institute of Complex Systems: Structural Biochemistry (ICS-6), Forschungszentrum Jülich GmbH, 52425, Jülich, Germany. ,
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49
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Dunning CJ, McGauran G, Willén K, Gouras GK, O’Connell DJ, Linse S. Direct High Affinity Interaction between Aβ42 and GSK3α Stimulates Hyperphosphorylation of Tau. A New Molecular Link in Alzheimer's Disease? ACS Chem Neurosci 2016; 7:161-70. [PMID: 26618561 PMCID: PMC4759616 DOI: 10.1021/acschemneuro.5b00262] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
![]()
Amyloid
β peptide (Aβ42) assemblies are considered central to
the development of Alzheimer’s disease, but the mechanism of
this toxicity remains unresolved. We screened protein microarrays
with on-pathway oligomeric Aβ42 to identify candidate proteins
interacting with toxic Aβ42 species. Samples prepared from Alexa546-Aβ42
and Aβ42 monomers at 1:5 molar ratio were incubated with the
array during a time window of the amyloid fibril formation reaction
during which the maximum number of transient oligomers exist in the
reaction flux. A specific interaction was detected between Aβ42
and glycogen synthase kinase 3α (GSK3α), a kinase previously
implicated in the disease pathology. This interaction was validated
with anti-GSK3α immunoprecipitation assays in neuronal cell
lysates. Confocal microscopy studies further identified colocalization
of Aβ42 and GSK3α in neurites of mature primary mouse
neurons. A high binding affinity (KD =
1 nM) was measured between Alexa488-Aβ42 and GSK3α in
solution using thermophoresis. An even lower apparent KD was estimated between GSK3α and dextran-immobilized
Aβ42 in surface plasmon resonance experiments. Parallel experiments
with GSK3β also identified colocalization and high affinity
binding to this isoform. GSK3α-mediated hyperphosphorylation
of the protein tau was found to be stimulated by Aβ42 in in vitro phosphorylation assays and identified a functional
relationship between the proteins. We uncover a direct and functional
molecular link between Aβ42 and GSK3α, which opens an
important avenue toward understanding the mechanism of Aβ42-mediated
neuronal toxicity in Alzheimer’s disease.
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Affiliation(s)
- Christopher J. Dunning
- Department of Biochemistry and Structural Biology, Chemical
Centre, Lund University, P O Box 124, SE22100 Lund, Sweden
- Department of Experimental Medical Science, Lund University, SE22100 Lund, Sweden
| | - Gavin McGauran
- School of Biomolecular & Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Katarina Willén
- Department of Experimental Medical Science, Lund University, SE22100 Lund, Sweden
| | - Gunnar K. Gouras
- Department of Experimental Medical Science, Lund University, SE22100 Lund, Sweden
| | - David J. O’Connell
- School of Biomolecular & Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Sara Linse
- Department of Biochemistry and Structural Biology, Chemical
Centre, Lund University, P O Box 124, SE22100 Lund, Sweden
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50
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Shen L, Zhu J. Heterogeneous surfaces to repel proteins. Adv Colloid Interface Sci 2016; 228:40-54. [PMID: 26691416 DOI: 10.1016/j.cis.2015.11.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/06/2015] [Accepted: 11/09/2015] [Indexed: 11/17/2022]
Abstract
The nonspecific adsorption of proteins is usually undesirable on solid surfaces as it induces adverse responses, such as platelet adhesion on medical devices, negative signals of biosensors and contamination blockage of filtration membranes. Thus, an important scheme in material science is to design and fabricate protein-repulsive surfaces. Early approaches in this field focused on homogeneous surfaces comprised of single type functionality. Yet, recent researches have demonstrated that surfaces with heterogeneities (chemistry and topography) show promising performance against protein adsorption. In this review, we will summarize the recent achievements and discuss the new perspectives in the research of developing and characterizing heterogeneous surfaces to repel proteins. The protein repulsion mechanisms of different heterogeneous surfaces will also be discussed in details, followed by the perspective and challenge of this emerging field.
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Affiliation(s)
- Lei Shen
- Key Laboratory for Large-Format Battery Materials and System of the Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Jintao Zhu
- Key Laboratory for Large-Format Battery Materials and System of the Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
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