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Goto Y, Nakajima K, Yamamoto S, Yamaguchi K. Supersaturation, a Critical Factor Underlying Proteostasis of Amyloid Fibril Formation. J Mol Biol 2024; 436:168475. [PMID: 38311232 DOI: 10.1016/j.jmb.2024.168475] [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: 10/03/2023] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 02/10/2024]
Abstract
From a physicochemical viewpoint, amyloid fibril formation is a phase transition from soluble to crystal-like sates limited by supersaturation. It occurs only above solubility (i.e., the solubility limit) coupled with a breakdown of supersaturation. Although many studies have examined the role of molecular chaperones in the context of proteostasis, the role of supersaturation has not been addressed. Moreover, although molecular chaperone-dependent disaggregations have been reported for preformed amyloid fibrils, amyloid fibrils will not dissolve above the solubility of monomers, even if agitations fragment long fibrils to shorter amyloid particles. On the other hand, on considering a reversible and coupled equilibrium of interactions, folding/unfolding and amyloid formation/disaggregation, molecules stabilizing native states can work as a disaggregase reversing the amyloid fibrils to monomers. It is likely that the proteostasis network has various intra- and extracellular components which disaggregate preformed amyloid fibrils as well as prevent amyloid formation. Further studies with a view of solubility and supersaturation will be essential for comprehensive understanding of proteostasis.
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Affiliation(s)
- Yuji Goto
- Microsonochemistry Joint Research Chair, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Kichitaro Nakajima
- Microsonochemistry Joint Research Chair, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Suguru Yamamoto
- Division of Clinical Nephrology and Rheumatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata 951-8510, Japan
| | - Keiichi Yamaguchi
- Microsonochemistry Joint Research Chair, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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2
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Chaturvedi A, Sharma S, Shukla R. Drug Nanocrystals: A Delivery Channel for Antiviral Therapies. AAPS PharmSciTech 2024; 25:41. [PMID: 38366178 DOI: 10.1208/s12249-024-02754-5] [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: 10/25/2023] [Accepted: 01/23/2024] [Indexed: 02/18/2024] Open
Abstract
Viral infections represent a significant threat to global health due to their highly communicable and potentially lethal nature. Conventional antiviral interventions encounter challenges such as drug resistance, tolerability issues, specificity concerns, high costs, side effects, and the constant mutation of viral proteins. Consequently, the exploration of alternative approaches is imperative. Therefore, nanotechnology-embedded drugs excelled as a novel approach purporting severe life-threatening viral disease. Integrating nanomaterials and nanoparticles enables ensuring precise drug targeting, improved drug delivery, and fostered pharmacokinetic properties. Notably, nanocrystals (NCs) stand out as one of the most promising nanoformulations, offering remarkable characteristics in terms of physicochemical properties (higher drug loading, improved solubility, and drug retention), pharmacokinetics (enhanced bioavailability, dose reduction), and optical properties (light absorptivity, photoluminescence). These attributes make NCs effective in diagnosing and ameliorating viral infections. This review comprises the prevalence, pathophysiology, and resistance of viral infections along with emphasizing on failure of current antivirals in the management of the diseases. Moreover, the review also highlights the role of NCs in various viral infections in mitigating, diagnosing, and other NC-based strategies combating viral infections. In vitro, in vivo, and clinical studies evident for the effectiveness of NCs against viral pathogens are also discussed.
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Affiliation(s)
- Akanksha Chaturvedi
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER) - Raebareli, Lucknow, 226002, India
| | - Swapnil Sharma
- Department of Pharmacy, Banasthali University, Banasthali, Rajasthan, 304022, India
| | - Rahul Shukla
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER) - Raebareli, Lucknow, 226002, India.
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3
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Supersaturation-Dependent Formation of Amyloid Fibrils. Molecules 2022; 27:molecules27144588. [PMID: 35889461 PMCID: PMC9321232 DOI: 10.3390/molecules27144588] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 07/11/2022] [Accepted: 07/12/2022] [Indexed: 01/27/2023] Open
Abstract
The supersaturation of a solution refers to a non-equilibrium phase in which the solution is trapped in a soluble state, even though the solute’s concentration is greater than its thermodynamic solubility. Upon breaking supersaturation, crystals form and the concentration of the solute decreases to its thermodynamic solubility. Soon after the discovery of the prion phenomena, it was recognized that prion disease transmission and propagation share some similarities with the process of crystallization. Subsequent studies exploring the structural and functional association between amyloid fibrils and amyloidoses solidified this paradigm. However, recent studies have not necessarily focused on supersaturation, possibly because of marked advancements in structural studies clarifying the atomic structures of amyloid fibrils. On the other hand, there is increasing evidence that supersaturation plays a critical role in the formation of amyloid fibrils and the onset of amyloidosis. Here, we review the recent evidence that supersaturation plays a role in linking unfolding/folding and amyloid fibril formation. We also introduce the HANABI (HANdai Amyloid Burst Inducer) system, which enables high-throughput analysis of amyloid fibril formation by the ultrasonication-triggered breakdown of supersaturation. In addition to structural studies, studies based on solubility and supersaturation are essential both to developing a comprehensive understanding of amyloid fibrils and their roles in amyloidosis, and to developing therapeutic strategies.
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4
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Development of HANABI, an ultrasonication-forced amyloid fibril inducer. Neurochem Int 2021; 153:105270. [PMID: 34954259 DOI: 10.1016/j.neuint.2021.105270] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 12/16/2021] [Accepted: 12/21/2021] [Indexed: 12/20/2022]
Abstract
Amyloid fibrils involved in amyloidoses are crystal-like aggregates, which are formed by breaking supersaturation of denatured proteins. Ultrasonication is an efficient method of agitation for breaking supersaturation and thus inducing amyloid fibrils. By combining an ultrasonicator and a microplate reader, we developed the HANABI (HANdai Amyloid Burst Inducer) system that enables high-throughput analysis of amyloid fibril formation. Among high-throughput approaches of amyloid fibril assays, the HANABI system has advantages in accelerating and detecting spontaneous amyloid fibril formation. HANABI is also powerful for amplifying a tiny amount of preformed amyloid fibrils by seeding. Thus, HANABI will contribute to creating therapeutic strategies against amyloidoses by identifying their biomarkers.
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5
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Liu H, Zou S, Dai S, Zhang J, Li W. Dopamine sheathing facilitates the anisotropic growth of lysozyme crystals. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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So M, Kimura Y, Yamaguchi K, Sugiki T, Fujiwara T, Aguirre C, Ikenaka K, Mochizuki H, Kawata Y, Goto Y. Polyphenol-solubility alters amyloid fibril formation of α-synuclein. Protein Sci 2021; 30:1701-1713. [PMID: 34046949 DOI: 10.1002/pro.4130] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/10/2021] [Accepted: 05/18/2021] [Indexed: 12/18/2022]
Abstract
Amyloid fibril formation is associated with various amyloidoses, including neurodegenerative diseases such as Alzheimer's and Parkinson's diseases. Amyloid fibrils form above the solubility of amyloidogenic proteins or peptides upon breaking supersaturation, followed by a nucleation and elongation mechanism, which is similar to the crystallization of solutes. Many additives, including salts, detergents, and natural compounds, promote or inhibit amyloid formation. However, the underlying mechanisms of the opposing effects are unclear. We examined the effects of two polyphenols, that is, epigallocatechin gallate (EGCG) and kaempferol-7─O─glycoside (KG), with high and low solubilities, respectively, on the amyloid formation of α-synuclein (αSN). EGCG and KG inhibited and promoted amyloid formation of αSN, respectively, when monitored by thioflavin T (ThT) fluorescence or transmission electron microscopy (TEM). Nuclear magnetic resonance (NMR) analysis revealed that, although interactions of αSN with soluble EGCG increased the solubility of αSN, thus inhibiting amyloid formation, interactions of αSN with insoluble KG reduced the solubility of αSN, thereby promoting amyloid formation. Our study suggests that opposing effects of polyphenols on amyloid formation of proteins and peptides can be interpreted based on the solubility of polyphenols.
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Affiliation(s)
- Masatomo So
- Institute for Protein Research, Osaka University, Osaka, Japan.,Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, UK
| | - Yuto Kimura
- Institute for Protein Research, Osaka University, Osaka, Japan
| | - Keiichi Yamaguchi
- Institute for Protein Research, Osaka University, Osaka, Japan.,Global Center for Medical Engineering and Informatics, Osaka University, Osaka, Japan
| | | | | | - Cesar Aguirre
- Institute for Protein Research, Osaka University, Osaka, Japan.,Department of Neurology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Kensuke Ikenaka
- Department of Neurology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Hideki Mochizuki
- Department of Neurology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yasushi Kawata
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, Japan
| | - Yuji Goto
- Institute for Protein Research, Osaka University, Osaka, Japan.,Global Center for Medical Engineering and Informatics, Osaka University, Osaka, Japan
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7
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Ferreira J, Opsteyn J, Rocha F, Castro F, Kuhn S. Ultrasonic protein crystallization: Promoting nucleation in microdroplets through pulsed sonication. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2020.08.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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8
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Yagi-Utsumi M, Yanaka S, Song C, Satoh T, Yamazaki C, Kasahara H, Shimazu T, Murata K, Kato K. Characterization of amyloid β fibril formation under microgravity conditions. NPJ Microgravity 2020; 6:17. [PMID: 32566742 PMCID: PMC7293247 DOI: 10.1038/s41526-020-0107-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 05/12/2020] [Indexed: 01/19/2023] Open
Abstract
Amyloid fibrils are self-assembled and ordered proteinaceous supramolecules structurally characterized by the cross-β spine. Amyloid formation is known to be related to various diseases typified by neurogenerative disorders and involved in a variety of functional roles. Whereas common mechanisms for amyloid formation have been postulated across diverse systems, the mesoscopic morphology of the fibrils is significantly affected by the type of solution condition in which it grows. Amyloid formation is also thought to share a phenomenological similarity with protein crystallization. Although many studies have demonstrated the effect of gravity on protein crystallization, its effect on amyloid formation has not been reported. In this study, we conducted an experiment at the International Space Station (ISS) to characterize fibril formation of 40-residue amyloid β (Aβ(1-40)) under microgravity conditions. Our comparative analyses revealed that the Aβ(1-40) fibrilization progresses much more slowly on the ISS than on the ground, similarly to protein crystallization. Furthermore, microgravity promoted the formation of distinct morphologies of Aβ(1-40) fibrils. Our findings demonstrate that the ISS provides an ideal experimental environment for detailed investigations of amyloid formation mechanisms by eliminating the conventionally uncontrollable factors derived from gravity.
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Affiliation(s)
- Maho Yagi-Utsumi
- Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan
- Institute for Molecular Science (IMS), National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho, Nagoya, Aichi 467-8603 Japan
| | - Saeko Yanaka
- Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan
- Institute for Molecular Science (IMS), National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho, Nagoya, Aichi 467-8603 Japan
| | - Chihong Song
- National Institute for Physiological Sciences, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan
| | - Tadashi Satoh
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho, Nagoya, Aichi 467-8603 Japan
| | - Chiaki Yamazaki
- JEM Mission Operations and Integration Center, Human Spaceflight Technology Directorate, Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki, 305-8505 Japan
| | - Haruo Kasahara
- Kibo Utilization Center, Human Spaceflight Technology Directorate, Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki, 305-8505 Japan
| | - Toru Shimazu
- Technology and Research Promotion Department, Japan Space Forum, 3-2-1 Otemachi, Chiyoda-ku, Tokyo 101-0004 Japan
| | - Kazuyoshi Murata
- National Institute for Physiological Sciences, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan
| | - Koichi Kato
- Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan
- Institute for Molecular Science (IMS), National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho, Nagoya, Aichi 467-8603 Japan
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9
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Dongmo Foumthuim CJ, Corazza A, Esposito G, Fogolari F. Molecular dynamics simulations of β2-microglobulin interaction with hydrophobic surfaces. MOLECULAR BIOSYSTEMS 2018; 13:2625-2637. [PMID: 29051937 DOI: 10.1039/c7mb00464h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Hydrophobic surfaces are known to adsorb and unfold proteins, a process that has been studied only for a few proteins. Here we address the interaction of β2-microglobulin, a paradigmatic protein for the study of amyloidogenesis, with hydrophobic surfaces. A system with 27 copies of the protein surrounded by a model cubic hydrophobic box is studied by implicit solvent molecular dynamics simulations. Most proteins adsorb on the walls of the box without major distortions in local geometry, whereas free molecules maintain proper structures and fluctuations as observed in explicit solvent molecular dynamics simulations. The major conclusions from the simulations are as follows: (i) the adopted implicit solvent model is adequate to describe protein dynamics and thermodynamics; (ii) adsorption occurs readily and is irreversible on the simulated timescale; (iii) the regions most involved in molecular encounters and stable interactions with the walls are the same as those that are important in protein-protein and protein-nanoparticle interactions; (iv) unfolding following adsorption occurs at regions found to be flexible by both experiments and simulations; (v) thermodynamic analysis suggests a very large contribution from van der Waals interactions, whereas unfavorable electrostatic interactions are not found to contribute much to adsorption energy. Surfaces with different degrees of hydrophobicity may occur in vivo. Our simulations show that adsorption is a fast and irreversible process which is accompanied by partial unfolding. The results and the thermodynamic analysis presented here are consistent with and rationalize previous experimental work.
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10
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Li DS, Lee YT, Xi Y, Pelivanov I, O'Donnell M, Pozzo LD. A small-angle scattering environment for in situ ultrasound studies. SOFT MATTER 2018; 14:5283-5293. [PMID: 29897086 PMCID: PMC6040585 DOI: 10.1039/c8sm01000e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ultrasonic devices are common tools in laboratory and industrial settings to produce cavitation events for cleaning, emulsification, cell lysis and other materials applications. Effects of sonication at the macroscopic scale can be visible while effects at the molecular and nano-scales are not easily probed and, therefore, not fully understood. We present a new small angle scattering sample environment designed specifically to study structural changes occurring in various types of dispersions at the nano-scale due to ultrasonic acoustic waves. The sample environment features two face-to-face high-intensity focused ultrasound transducers coaxially aligned and normal to the neutron/X-ray beam propagation direction. A third broadband transducer is fixed beneath the scattering volume to acoustically monitor for cavitation events. By correlating acoustic data to scattering data, measured structural changes can be correlated to changes in parameters such as frequency, acoustic pressure, or cavitation pressure threshold. Several example applications of colloidal systems effectively influenced by ultrasound fields are also presented to demonstrate the capabilities of the device and to motivate future work on in situ scattering analysis of ultrasound materials processing methods.
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Affiliation(s)
- David S Li
- Department of Chemical Engineering, University of Washington, Seattle, WA, USA.
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11
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Xi Y, Li DS, Newbloom GM, Tatum WK, O'Donnell M, Luscombe CK, Pozzo LD. Sonocrystallization of conjugated polymers with ultrasound fields. SOFT MATTER 2018; 14:4963-4976. [PMID: 29850739 PMCID: PMC6013402 DOI: 10.1039/c8sm00905h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Ultrasound acoustic waves are demonstrated to assemble poly-3-hexylthiophene (P3HT) chains into nanofibers after they are fully dissolved in what are commonly considered to be 'good' solvents. In the absence of ultrasound, the polymer remains fully dissolved and does not self-assemble for weeks. UV-vis spectroscopy, ultra-small angle X-ray scattering (USAXS) and small angle neutron scattering (SANS) are used to characterize the induced assembly process and to quantify the fraction of polymer that forms nanofibers. It is determined that the solvent type, insonation time, and aging periods are all important factors affecting the structure and final concentration of fibers. The effect of changing polymer regio-regularity, alkyl chain length, and side chain to thiophene ratio are also explored. High intensity focused ultrasound (HIFU) fields of variable intensity are utilized to reveal the physical mechanisms leading to nanofiber formation, which is strongly correlated to cavitation events in the solvent. This in situ HIFU cell, which is designed for simultaneous scattering analysis, is also used to probe for structural changes occurring over multiple length scales using USAXS and SANS. The proposed acoustic assembly mechanism suggests that, even when dispersed in 'good' solvents such as bromobenzene, dichlorobenzene and chloroform, P3HT chains are still not in a thermodynamically stable state. Instead, they are stabilized by local energy barriers that slow down and effectively prevent crystallization. Ultrasound fields are found to provide enough mechanical energy to overcome these barriers, triggering the formation of small crystalline nuclei that subsequently seed the growth of larger nanofibers.
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Affiliation(s)
- Yuyin Xi
- Department of Chemical Engineering, University of Washington, Seattle, WA 98195, USA.
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12
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Zhang CY, Liu Y, Tian XH, Liu WJ, Li XY, Yang LX, Jiang HJ, Han C, Chen KA, Yin DC. Effect of real-world sounds on protein crystallization. Int J Biol Macromol 2018; 112:841-851. [PMID: 29425866 DOI: 10.1016/j.ijbiomac.2018.02.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 01/31/2018] [Accepted: 02/06/2018] [Indexed: 11/24/2022]
Abstract
Protein crystallization is sensitive to the environment, while audible sound, as a physical and environmental factor during the entire process, is always ignored. We have previously reported that protein crystallization can be affected by a computer-generated monotonous sound with fixed frequency and amplitude. However, real-world sounds are not so simple but are complicated by parameters (frequency, amplitude, timbre, etc.) that vary over time. In this work, from three sound categories (music, speech, and environmental sound), we selected 26 different sounds and evaluated their effects on protein crystallization. The correlation between the sound parameters and the crystallization success rate was studied mathematically. The results showed that the real-world sounds, similar to the artificial monotonous sounds, could not only affect protein crystallization, but also improve crystal quality. Crystallization was dependent not only on the frequency, amplitude, volume, irradiation time, and overall energy of the sounds but also on their spectral characteristics. Based on these results, we suggest that intentionally applying environmental sound may be a simple and useful tool to promote protein crystallization.
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Affiliation(s)
- Chen-Yan Zhang
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Yue Liu
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Xu-Hua Tian
- School of Marine Sciences and Technology, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Wen-Jing Liu
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Xiao-Yu Li
- The College of Life Sciences, Northwest University, Xi'an 710069, Shaanxi, PR China
| | - Li-Xue Yang
- School of Marine Sciences and Technology, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Han-Jun Jiang
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Chong Han
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Ke-An Chen
- School of Marine Sciences and Technology, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China.
| | - Da-Chuan Yin
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China.
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13
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Iwata K, Terazima M, Masuhara H. Novel physical chemistry approaches in biophysical researches with advanced application of lasers: Detection and manipulation. Biochim Biophys Acta Gen Subj 2017; 1862:335-357. [PMID: 29108958 DOI: 10.1016/j.bbagen.2017.11.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/30/2017] [Accepted: 11/01/2017] [Indexed: 10/18/2022]
Abstract
Novel methodologies utilizing pulsed or intense CW irradiation obtained from lasers have a major impact on biological sciences. In this article, recent development in biophysical researches fully utilizing the laser irradiation is described for three topics, time-resolved fluorescence spectroscopy, time-resolved thermodynamics, and manipulation of the biological assemblies by intense laser irradiation. First, experimental techniques for time-resolved fluorescence spectroscopy are concisely explained in Section 2. As an example of the recent application of time-resolved fluorescence spectroscopy to biological systems, evaluation of the viscosity of lipid bilayer membranes is described. The results of the spectroscopic experiments strongly suggest the presence of heterogeneous membrane structure with two different viscosity values in liposomes formed by a single phospholipid. Section 3 covers the time-resolved thermodynamics. Thermodynamical properties are important to characterize biomolecules. However, measurement of these quantities for short-lived intermediate species has been impossible by traditional thermodynamical techniques. Recently, development of a spectroscopic method based on the transient grating method enables us to measure these quantities and also to elucidate reaction kinetics which cannot be detected by other spectroscopic methods. The principle of the measurements and applications to some protein reactions are reviewed. Manipulation and fabrication of supramolecues, amino acids, proteins, and living cells by intense laser irradiation are described in Section 4. Unconventional assembly, crystallization and growth, amyloid fibril formation, and living cell manipulation are achieved by CW laser trapping and femtosecond laser-induced cavitation bubbling. Their spatio-temporal controllability is opening a new avenue in the relevant molecular and bioscience research fields. This article is part of a Special Issue entitled "Biophysical Exploration of Dynamical Ordering of Biomolecular Systems" edited by Dr. Koichi Kato.
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Affiliation(s)
- Koichi Iwata
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan.
| | - Masahide Terazima
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
| | - Hiroshi Masuhara
- Department of Applied Chemistry, National Chiao Tung University, 1001 Ta Hsueh Rd., Hsinchu 30010, Taiwan.
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14
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Liu TH, Yuyama KI, Hiramatsu T, Yamamoto N, Chatani E, Miyasaka H, Sugiyama T, Masuhara H. Femtosecond-Laser-Enhanced Amyloid Fibril Formation of Insulin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:8311-8318. [PMID: 28742366 DOI: 10.1021/acs.langmuir.7b01822] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Femtosecond (fs)-laser-induced crystallization as a novel crystallization technique was proposed for the first time by our group, where the crystallization time can be significantly shortened under fs laser irradiation. Similarly, we have further extended our investigation to amyloid fibril formation, also known as a nucleation-dependence process. Here we demonstrate that the necessary time for amyloid fibril formation can be significantly shortened by fs laser irradiation, leading to favorable enhancement. The enhancement was confirmed by both spectral measurements and direct observations of amyloid fibrils. The thioflavin T fluorescence intensity of laser-irradiated solution increased earlier than that of the control solution, and such a difference was simultaneously revealed by ellipticity changes. At the same time before intensity saturation in fluorescence, the number of amyloid fibrils obtained under laser irradiation was generally more than that in the control solution. Besides, such an enhancement is correlated to the laser power threshold of cavitation bubbling. Possible mechanisms are proposed by referring to fs-laser-induced crystallization and ultrasonication-induced amyloid fibril formation.
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Affiliation(s)
- Tsung-Han Liu
- Department of Applied Chemistry, National Chiao Tung University , Hsinchu 30010, Taiwan
| | - Ken-Ichi Yuyama
- Department of Applied Chemistry, National Chiao Tung University , Hsinchu 30010, Taiwan
| | - Takato Hiramatsu
- Department of Chemistry, Graduate School of Science, Kobe University , Kobe, Hyogo 657-8501, Japan
| | - Naoki Yamamoto
- Department of Chemistry, Graduate School of Science, Kobe University , Kobe, Hyogo 657-8501, Japan
| | - Eri Chatani
- Department of Chemistry, Graduate School of Science, Kobe University , Kobe, Hyogo 657-8501, Japan
| | - Hiroshi Miyasaka
- Division of Frontier Materials Science and Center for Promotion of Advanced Interdisciplinary Research, Graduate School of Engineering Science, Osaka University , Toyonaka, Osaka 560-8531, Japan
| | - Teruki Sugiyama
- Department of Applied Chemistry, National Chiao Tung University , Hsinchu 30010, Taiwan
- Graduate School of Materials Science, Nara Institute of Science and Technology , Ikoma, Nara 630-0192, Japan
| | - Hiroshi Masuhara
- Department of Applied Chemistry, National Chiao Tung University , Hsinchu 30010, Taiwan
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15
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Yuyama KI, Ueda M, Nagao S, Hirota S, Sugiyama T, Masuhara H. A Single Spherical Assembly of Protein Amyloid Fibrils Formed by Laser Trapping. Angew Chem Int Ed Engl 2017; 56:6739-6743. [DOI: 10.1002/anie.201702352] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Ken-ichi Yuyama
- Department of Applied Chemistry; National Chiao Tung University; 1001 University Road Hsinchu 300 Taiwan
- Present address: Research Institute for Electronic Science; Hokkaido University; N20W10, Kita-Ward Sapporo 001-0020 Japan
| | - Mariko Ueda
- Graduate School of Materials Science; Nara Institute of Science and Technology; 8916-5 Takayama-cho, Ikoma Nara 630-0192 Japan
| | - Satoshi Nagao
- Graduate School of Materials Science; Nara Institute of Science and Technology; 8916-5 Takayama-cho, Ikoma Nara 630-0192 Japan
| | - Shun Hirota
- Graduate School of Materials Science; Nara Institute of Science and Technology; 8916-5 Takayama-cho, Ikoma Nara 630-0192 Japan
| | - Teruki Sugiyama
- Department of Applied Chemistry; National Chiao Tung University; 1001 University Road Hsinchu 300 Taiwan
- Graduate School of Materials Science; Nara Institute of Science and Technology; 8916-5 Takayama-cho, Ikoma Nara 630-0192 Japan
| | - Hiroshi Masuhara
- Department of Applied Chemistry; National Chiao Tung University; 1001 University Road Hsinchu 300 Taiwan
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16
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Yuyama KI, Ueda M, Nagao S, Hirota S, Sugiyama T, Masuhara H. A Single Spherical Assembly of Protein Amyloid Fibrils Formed by Laser Trapping. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702352] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ken-ichi Yuyama
- Department of Applied Chemistry; National Chiao Tung University; 1001 University Road Hsinchu 300 Taiwan
- Present address: Research Institute for Electronic Science; Hokkaido University; N20W10, Kita-Ward Sapporo 001-0020 Japan
| | - Mariko Ueda
- Graduate School of Materials Science; Nara Institute of Science and Technology; 8916-5 Takayama-cho, Ikoma Nara 630-0192 Japan
| | - Satoshi Nagao
- Graduate School of Materials Science; Nara Institute of Science and Technology; 8916-5 Takayama-cho, Ikoma Nara 630-0192 Japan
| | - Shun Hirota
- Graduate School of Materials Science; Nara Institute of Science and Technology; 8916-5 Takayama-cho, Ikoma Nara 630-0192 Japan
| | - Teruki Sugiyama
- Department of Applied Chemistry; National Chiao Tung University; 1001 University Road Hsinchu 300 Taiwan
- Graduate School of Materials Science; Nara Institute of Science and Technology; 8916-5 Takayama-cho, Ikoma Nara 630-0192 Japan
| | - Hiroshi Masuhara
- Department of Applied Chemistry; National Chiao Tung University; 1001 University Road Hsinchu 300 Taiwan
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17
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Noda S, So M, Adachi M, Kardos J, Akazawa-Ogawa Y, Hagihara Y, Goto Y. Thioflavin T-Silent Denaturation Intermediates Support the Main-Chain-Dominated Architecture of Amyloid Fibrils. Biochemistry 2016; 55:3937-48. [PMID: 27345358 DOI: 10.1021/acs.biochem.6b00231] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ultrasonication is considered one of the most effective agitations for inducing the spontaneous formation of amyloid fibrils. When we induced the ultrasonication-dependent fibrillation of β2-microglobulin and insulin monitored by amyloid-specific thioflavin T (ThT) fluorescence, both proteins showed a significant decrease in ThT fluorescence after the burst-phase increase. The decrease in ThT fluorescence was accelerated when the ultrasonic power was stronger, suggesting that this decrease was caused by the partial denaturation of preformed fibrils. The possible intermediates of denaturation retained amyloid-like morphologies, secondary structures, and seeding potentials. Similar denaturation intermediates were also observed when fibrils were denatured by guanidine hydrochloride or sodium dodecyl sulfate. The presence of these denaturation intermediates is consistent with the main-chain-dominated architecture of amyloid fibrils. Moreover, in the three types of denaturation experiments conducted, insulin fibrils were more stable than β2-microglobulin fibrils, suggesting that the relative stability of various fibrils is independent of the method of denaturation.
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Affiliation(s)
- Sayaka Noda
- Institute for Protein Research, Osaka University , Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Masatomo So
- Institute for Protein Research, Osaka University , Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Masayuki Adachi
- Institute for Protein Research, Osaka University , Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - József Kardos
- Department of Biochemistry and MTA-ELTE NAP B Neuroimmunology Research Group, Eötvös Loránd University , Pázmány sétány 1/C, Budapest 1117, Hungary
| | - Yoko Akazawa-Ogawa
- National Institute of Advanced Industrial Science and Technology (AIST) , 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Yoshihisa Hagihara
- National Institute of Advanced Industrial Science and Technology (AIST) , 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Yuji Goto
- Institute for Protein Research, Osaka University , Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
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18
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Louros NN, Bolas GMP, Tsiolaki PL, Hamodrakas SJ, Iconomidou VA. Intrinsic aggregation propensity of the CsgB nucleator protein is crucial for curli fiber formation. J Struct Biol 2016; 195:179-189. [PMID: 27245712 DOI: 10.1016/j.jsb.2016.05.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 05/26/2016] [Accepted: 05/28/2016] [Indexed: 11/28/2022]
Abstract
Several organisms exploit the extraordinary physical properties of amyloid fibrils forming natural protective amyloids, in an effort to support complex biological functions. Curli amyloid fibers are a major component of mature biofilms, which are produced by many Enterobacteriaceae species and are responsible, among other functions, for the initial adhesion of bacteria to surfaces or cells. The main axis of curli fibers is formed by a major structural subunit, known as CsgA. CsgA self-assembly is promoted by oligomeric nuclei formed by a minor curli subunit, known as the CsgB nucleator protein. Here, by implementing AMYLPRED2, a consensus prediction method for the identification of 'aggregation-prone' regions in protein sequences, developed in our laboratory, we have successfully identified potent amyloidogenic regions of the CsgB subunit. Peptide-analogues corresponding to the predicted 'aggregation-prone' segments of CsgB were chemically synthesized and studied, utilizing several biophysical techniques. Our experimental data indicate that these peptides self-assemble in solution, forming fibrils with characteristic amyloidogenic properties. Using comparative modeling techniques, we have developed three-dimensional models of both CsgA and CsgB subunits. Structural analysis revealed that the identified 'aggregation-prone' segments may promote gradual polymerization of CsgB. Briefly, our results indicate that the intrinsic self-aggregation propensity of the CsgB subunit, most probably has a pivotal role in initiating the formation of curli amyloid fibers by promoting the self-assembly process of the CsgB nucleator protein.
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Affiliation(s)
- Nikolaos N Louros
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 157 01, Greece
| | - Georgios M P Bolas
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 157 01, Greece
| | - Paraskevi L Tsiolaki
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 157 01, Greece
| | - Stavros J Hamodrakas
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 157 01, Greece
| | - Vassiliki A Iconomidou
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 157 01, Greece.
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19
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Prade E, Barucker C, Sarkar R, Althoff-Ospelt G, Lopez del Amo JM, Hossain S, Zhong Y, Multhaup G, Reif B. Sulindac Sulfide Induces the Formation of Large Oligomeric Aggregates of the Alzheimer's Disease Amyloid-β Peptide Which Exhibit Reduced Neurotoxicity. Biochemistry 2016; 55:1839-49. [PMID: 26900939 DOI: 10.1021/acs.biochem.5b01272] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Alzheimer's disease is characterized by deposition of the amyloid β-peptide (Aβ) in brain tissue of affected individuals. In recent years, many potential lead structures have been suggested that can potentially be used for diagnosis and therapy. However, the mode of action of these compounds is so far not understood. Among these small molecules, the nonsteroidal anti-inflammatory drug (NSAID) sulindac sulfide received a lot of attention. In this manuscript, we characterize the interaction between the monomeric Aβ peptide and the NSAID sulindac sulfide. We find that sulindac sulfide efficiently depletes the pool of toxic oligomers by enhancing the rate of fibril formation. In vitro, sulindac sulfide forms colloidal particles which catalyze the formation of fibrils. Aggregation is immediate, presumably by perturbing the supersaturated Aβ solution. We find that sulindac sulfide induced Aβ aggregates are structurally homogeneous. The C-terminal part of the peptide adopts a β-sheet structure, whereas the N-terminus is disordered. The salt bridge between D23 and K28 is present, similar as in wild type fibril structures. (13)C-(19)F transferred echo double resonance experiments suggest that sulindac sulfide colocalizes with the Aβ peptide in the aggregate.
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Affiliation(s)
- Elke Prade
- Munich Center for Integrated Protein Science (CIPS-M) at Department Chemie, Technische Universität München (TUM) , Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Christian Barucker
- Department of Pharmacology & Therapeutics, McGill University , 3655 Promenade Sir-William-Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Riddhiman Sarkar
- Munich Center for Integrated Protein Science (CIPS-M) at Department Chemie, Technische Universität München (TUM) , Lichtenbergstrasse 4, 85747 Garching, Germany
| | | | - Juan Miguel Lopez del Amo
- Leibniz-Institut für Molekulare Pharmakologie (FMP), Robert-Rössle-Strasse 10, 13125 Berlin, Germany
| | - Shireen Hossain
- Department of Pharmacology & Therapeutics, McGill University , 3655 Promenade Sir-William-Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Yifei Zhong
- Department of Pharmacology & Therapeutics, McGill University , 3655 Promenade Sir-William-Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Gerd Multhaup
- Department of Pharmacology & Therapeutics, McGill University , 3655 Promenade Sir-William-Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Bernd Reif
- Munich Center for Integrated Protein Science (CIPS-M) at Department Chemie, Technische Universität München (TUM) , Lichtenbergstrasse 4, 85747 Garching, Germany.,Helmholtz-Zentrum München (HMGU), Deutsches Forschungszentrum für Gesundheit und Umwelt, Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany
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20
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Nakajima K, Ogi H, Adachi K, Noi K, Hirao M, Yagi H, Goto Y. Nucleus factory on cavitation bubble for amyloid β fibril. Sci Rep 2016; 6:22015. [PMID: 26912021 PMCID: PMC4766559 DOI: 10.1038/srep22015] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 02/05/2016] [Indexed: 12/18/2022] Open
Abstract
Structural evolution from monomer to fibril of amyloid β peptide is related to pathogenic mechanism of Alzheimer disease, and its acceleration is a long-running problem in drug development. This study reveals that ultrasonic cavitation bubbles behave as catalysts for nucleation of the peptide: The nucleation reaction is highly dependent on frequency and pressure of acoustic wave, and we discover an optimum acoustical condition, at which the reaction-rate constant for nucleation is increased by three-orders-of magnitudes. A theoretical model is proposed for explaining highly frequency and pressure dependent nucleation reaction, where monomers are captured on the bubble surface during its growth and highly condensed by subsequent bubble collapse, so that they are transiently exposed to high temperatures. Thus, the dual effects of local condensation and local heating contribute to dramatically enhance the nucleation reaction. Our model consistently reproduces the frequency and pressure dependences, supporting its essential applicability.
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Affiliation(s)
- Kichitaro Nakajima
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Hirotsugu Ogi
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kanta Adachi
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kentaro Noi
- Institute of Molecular Embryology and Genetics, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto 860-0811, Japan
| | - Masahiko Hirao
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Hisashi Yagi
- Center for Reserch on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-cho minami, Tottori, Tottori 680-8550, Japan
| | - Yuji Goto
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
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21
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So M, Hall D, Goto Y. Revisiting supersaturation as a factor determining amyloid fibrillation. Curr Opin Struct Biol 2016; 36:32-9. [PMID: 26774801 DOI: 10.1016/j.sbi.2015.11.009] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 11/20/2015] [Indexed: 10/22/2022]
Abstract
Amyloid fibrils involved in various diseases are formed by a nucleation-growth mechanism, similar to the crystallization of solutes from solution. Solubility and supersaturation are two of the most important factors determining crystallization of solutes. Moreover, crystallization competes with glass formation in which solutes collapse into amorphous aggregates. Recent studies on the formation of amyloid fibrils and amorphous aggregates indicate that the partition between distinct types of aggregates can be rationally explained by a kinetic and thermodynamic competition between them. Understanding the role of supersaturation in determining aggregation-based phase transitions of denatured proteins provides an important complementary point of view to structural studies of protein aggregates.
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Affiliation(s)
- Masatomo So
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Damien Hall
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan; Research School of Chemistry, Australian National University, Acton, ACT 2601, Australia
| | - Yuji Goto
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan.
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22
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Nokwe CN, Hora M, Zacharias M, Yagi H, John C, Reif B, Goto Y, Buchner J. The Antibody Light-Chain Linker Is Important for Domain Stability and Amyloid Formation. J Mol Biol 2015; 427:3572-3586. [PMID: 26408269 DOI: 10.1016/j.jmb.2015.09.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 09/11/2015] [Accepted: 09/14/2015] [Indexed: 12/14/2022]
Abstract
The association of light chains (LCs) and heavy chains is the basis for functional antibodies that are essential for adaptive immune responses. However, in some cases, LCs and especially fragments consisting of the LC variable (VL) domain are pathologically deposited in fatal aggregation diseases. The two domains of the LC are connected by a highly conserved linker. We show here that, unexpectedly, the linker residue Arg108 affects the conformational stability and folding of both VLκ and LC constant (CLκ) domains. Interestingly, the extension of VL by Arg108 results in its resistance to amyloid formation, which suggests that the nature of the truncation of the LC plays a crucial role in disease progression. Increased solvation due to the exposed charged C-terminal Arg108 residue explains its stabilizing effects on the VL domain. For the CL domain, the interaction of N-terminal loop residues with Arg108 is important for the integrity of the domain, as the disruption of this interaction results in fluctuation, partial opening of the protein's interior and the exposure of hydrophobic residues that destabilize the domain. This establishes new principles for antibody domain architecture and amyloidogenicity.
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Affiliation(s)
- Cardine N Nokwe
- Center for Integrated Protein Science at the Department Chemie, Technische Universität München Lichtenbergstrasse 4, D-85747 Garching, Germany
| | - Manuel Hora
- Center for Integrated Protein Science at the Department Chemie, Technische Universität München Lichtenbergstrasse 4, D-85747 Garching, Germany
| | - Martin Zacharias
- Center for Integrated Protein Science at the Department Physik, Technische Universität München, James-Franck-Strasse 1, D-85748 Garching, Germany
| | - Hisashi Yagi
- Division of Protein Structural Biology, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Christine John
- Center for Integrated Protein Science at the Department Chemie, Technische Universität München Lichtenbergstrasse 4, D-85747 Garching, Germany
| | - Bernd Reif
- Center for Integrated Protein Science at the Department Chemie, Technische Universität München Lichtenbergstrasse 4, D-85747 Garching, Germany
| | - Yuji Goto
- Division of Protein Structural Biology, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Johannes Buchner
- Center for Integrated Protein Science at the Department Chemie, Technische Universität München Lichtenbergstrasse 4, D-85747 Garching, Germany.
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23
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Du J, Li X, Zhao H, Zhou Y, Wang L, Tian S, Wang Y. Nanosuspensions of poorly water-soluble drugs prepared by bottom-up technologies. Int J Pharm 2015; 495:738-49. [PMID: 26383838 DOI: 10.1016/j.ijpharm.2015.09.021] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 08/28/2015] [Accepted: 09/12/2015] [Indexed: 12/30/2022]
Abstract
In recent years, nanosuspension has been considered effective in the delivery of water-soluble drugs. One of the main challenges to effective drug delivery is designing an appropriate nanosuspension preparation approach with low energy input and erosion contamination, such as the bottom-up method. This review focuses on bottom-up technologies for preparation of nanosuspensions. The features and advantages of drug nanosuspension, including bottom-up methods as well as the corresponding characterization techniques, solidification methods, and drug delivery dosage forms, are discussed in detail. Certain limitations of commercial nanosuspension products are also reviewed.
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Affiliation(s)
- Juan Du
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, Shandong, PR China
| | - Xiaoguang Li
- Hospital, Qilu University of Technology, Jinan 250353, Shandong, PR China
| | - Huanxin Zhao
- Institute of Materia Medica, Shandong Academy of Medical Sciences, Jinan 250062, Shandong, PR China
| | - Yuqi Zhou
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, Shandong, PR China
| | - Lulu Wang
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, Shandong, PR China.
| | - Shushu Tian
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, Shandong, PR China
| | - Yancai Wang
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, Shandong, PR China
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24
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Adachi M, So M, Sakurai K, Kardos J, Goto Y. Supersaturation-limited and Unlimited Phase Transitions Compete to Produce the Pathway Complexity in Amyloid Fibrillation. J Biol Chem 2015; 290:18134-18145. [PMID: 26063798 DOI: 10.1074/jbc.m115.648139] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Indexed: 01/16/2023] Open
Abstract
Although amyloid fibrils and amorphous aggregates are two types of aggregates formed by denatured proteins, their relationship currently remains unclear. We used β2-microglobulin (β2m), a protein responsible for dialysis-related amyloidosis, to clarify the mechanism by which proteins form either amyloid fibrils or amorphous aggregates. When ultrasonication was used to accelerate the spontaneous fibrillation of β2m at pH 2.0, the effects observed depended on ultrasonic power; although stronger ultrasonic power effectively accelerated fibrillation, excessively strong ultrasonic power decreased the amount of fibrils formed, as monitored by thioflavin T fluorescence. An analysis of the products formed indicated that excessively strong ultrasonic power generated fibrillar aggregates that retained β-structures but without high efficiency as seeds. On the other hand, when the spontaneous fibrillation of β2m was induced at higher concentrations of NaCl at pH 2.0 with stirring, amorphous aggregates became more dominant than amyloid fibrils. These apparent complexities in fibrillation were explained comprehensively by a competitive mechanism in which supersaturation-limited reactions competed with supersaturation-unlimited reactions. We link the kinetics of protein aggregation and a conformational phase diagram, in which supersaturation played important roles.
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Affiliation(s)
- Masayuki Adachi
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Masatomo So
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Kazumasa Sakurai
- High Pressure Protein Research Center, Institute for Advanced Technology, Kinki University, 930 Nishimitani, Kinokawa, Wakayama 649-6493, Japan
| | - József Kardos
- Department of Biochemistry and MTA-ELTE NAP B Neuroimmunology Research Group, Eötvös Loránd University, Pázmány sétány 1/C, Budapest, 1117, Hungary
| | - Yuji Goto
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan.
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25
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Yagi H, Mizuno A, So M, Hirano M, Adachi M, Akazawa-Ogawa Y, Hagihara Y, Ikenoue T, Lee YH, Kawata Y, Goto Y. Ultrasonication-dependent formation and degradation of α-synuclein amyloid fibrils. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2014; 1854:209-17. [PMID: 25528988 DOI: 10.1016/j.bbapap.2014.12.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 12/04/2014] [Accepted: 12/12/2014] [Indexed: 01/15/2023]
Abstract
Ultrasonication can be used to break the supersaturation of α-synuclein, a protein associated with Parkinson's disease, at pH7.4 above the critical concentration of fibrillation, thereby inducing the formation of amyloid fibrils. We speculated that ultrasonication could also be used to depolymerize preformed fibrils below the critical concentration. However, extensive ultrasonic irradiation transformed preformed fibrils into amorphous aggregates even above the critical concentration. Exposing preformed fibrils to the hydrophobic air-water interface of cavitation bubbles may have destabilized the fibrils and stabilized amorphous aggregates. Upon extensive ultrasonic irradiation, the accompanying decomposition of chemical structures was suggested when monitored by analytical ultracentrifugation. Amorphous aggregates produced by extensive ultrasonication showed higher cytotoxicity, suggesting that, although ultrasonication might be a useful approach for inactivating amyloid fibrils, potential cytotoxicity of amorphous aggregates should be considered.
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Affiliation(s)
- Hisashi Yagi
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan; Center for Research on Green Sustainable Chemistry, Tottori University, Tottori 680-8552, Japan
| | - Aiko Mizuno
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Masatomo So
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Miki Hirano
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Masayuki Adachi
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Yoko Akazawa-Ogawa
- National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Yoshihisa Hagihara
- National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Tatsuya Ikenoue
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Young-Ho Lee
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Yasushi Kawata
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan
| | - Yuji Goto
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan.
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26
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Umemoto A, Yagi H, So M, Goto Y. High-throughput analysis of ultrasonication-forced amyloid fibrillation reveals the mechanism underlying the large fluctuation in the lag time. J Biol Chem 2014; 289:27290-27299. [PMID: 25118286 PMCID: PMC4175360 DOI: 10.1074/jbc.m114.569814] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Amyloid fibrils form in supersaturated solutions of precursor proteins by a nucleation and growth mechanism characterized by a lag time. Although the lag time provides a clue to understanding the complexity of nucleation events, its long period and low reproducibility have been obstacles for exact analysis. Ultrasonication is known to effectively break supersaturation and force fibrillation. By constructing a Handai amyloid burst inducer, which combines a water bath-type ultrasonicator and a microplate reader, we examined the ultrasonication-forced fibrillation of several proteins, with a focus on the fluctuation in the lag time. Amyloid fibrillation of hen egg white lysozyme was examined at pH 2.0 in the presence of 1.0-5.0 M guanidine hydrochloride (GdnHCl), in which the dominant species varied from the native to denatured conformations. Although fibrillation occurred at various concentrations of GdnHCl, the lag time varied largely, with a minimum being observed at ∼3.0 M, the concentration at which GdnHCl-dependent denaturation ended. The coefficient of variation of the lag time did not depend significantly on the GdnHCl concentration and was 2-fold larger than that of the ultrasonication-dependent oxidation of iodide, a simple model reaction. These results suggest that the large fluctuation observed in the lag time for amyloid fibrillation originated from a process associated with a common amyloidogenic intermediate, which may have been a relatively compact denatured conformation. We also suggest that the Handai amyloid burst inducer system will be useful for studying the mechanism of crystallization of proteins because proteins form crystals by the same mechanism as amyloid fibrils under supersaturation.
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Affiliation(s)
- Ayaka Umemoto
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Hisashi Yagi
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Masatomo So
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Yuji Goto
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan.
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27
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Nokwe CN, Zacharias M, Yagi H, Hora M, Reif B, Goto Y, Buchner J. A residue-specific shift in stability and amyloidogenicity of antibody variable domains. J Biol Chem 2014; 289:26829-26846. [PMID: 25096580 DOI: 10.1074/jbc.m114.582247] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Variable (V) domains of antibodies are essential for antigen recognition by our adaptive immune system. However, some variants of the light chain V domains (VL) form pathogenic amyloid fibrils in patients. It is so far unclear which residues play a key role in governing these processes. Here, we show that the conserved residue 2 of VL domains is crucial for controlling its thermodynamic stability and fibril formation. Hydrophobic side chains at position 2 stabilize the domain, whereas charged residues destabilize and lead to amyloid fibril formation. NMR experiments identified several segments within the core of the VL domain to be affected by changes in residue 2. Furthermore, molecular dynamic simulations showed that hydrophobic side chains at position 2 remain buried in a hydrophobic pocket, and charged side chains show a high flexibility. This results in a predicted difference in the dissociation free energy of ∼10 kJ mol(-1), which is in excellent agreement with our experimental values. Interestingly, this switch point is found only in VL domains of the κ family and not in VLλ or in VH domains, despite a highly similar domain architecture. Our results reveal novel insight into the architecture of variable domains and the prerequisites for formation of amyloid fibrils. This might also contribute to the rational design of stable variable antibody domains.
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Affiliation(s)
- Cardine N Nokwe
- Center for Integrated Protein Science, Department of Chemie, Technische Universität München, Lichtenbergstrasse 4, D-85747 Garching, Germany
| | - Martin Zacharias
- Center for Integrated Protein Science, Department of Physik, Technische Universität München, James-Franck-Strasse 1, D-85748 Garching, Germany
| | - Hisashi Yagi
- Department of Chemistry and Biotechnology, Graduate School of Engineering and Center for Research on Green Sustainable Chemistry, Tottori University, 4-101 Koyamatyo-minami, Tottori 680-8550, Japan, and; Division of Protein Structural Biology, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Manuel Hora
- Center for Integrated Protein Science, Department of Chemie, Technische Universität München, Lichtenbergstrasse 4, D-85747 Garching, Germany
| | - Bernd Reif
- Center for Integrated Protein Science, Department of Chemie, Technische Universität München, Lichtenbergstrasse 4, D-85747 Garching, Germany
| | - Yuji Goto
- Division of Protein Structural Biology, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Johannes Buchner
- Center for Integrated Protein Science, Department of Chemie, Technische Universität München, Lichtenbergstrasse 4, D-85747 Garching, Germany,.
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Ikenoue T, Lee YH, Kardos J, Yagi H, Ikegami T, Naiki H, Goto Y. Heat of supersaturation-limited amyloid burst directly monitored by isothermal titration calorimetry. Proc Natl Acad Sci U S A 2014; 111:6654-9. [PMID: 24753579 PMCID: PMC4020073 DOI: 10.1073/pnas.1322602111] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Amyloid fibrils form in supersaturated solutions via a nucleation and growth mechanism. Although the structural features of amyloid fibrils have become increasingly clearer, knowledge on the thermodynamics of fibrillation is limited. Furthermore, protein aggregation is not a target of calorimetry, one of the most powerful approaches used to study proteins. Here, with β2-microglobulin, a protein responsible for dialysis-related amyloidosis, we show direct heat measurements of the formation of amyloid fibrils using isothermal titration calorimetry (ITC). The spontaneous fibrillation after a lag phase was accompanied by exothermic heat. The thermodynamic parameters of fibrillation obtained under various protein concentrations and temperatures were consistent with the main-chain dominated structural model of fibrils, in which overall packing was less than that of the native structures. We also characterized the thermodynamics of amorphous aggregation, enabling the comparison of protein folding, amyloid fibrillation, and amorphous aggregation. These results indicate that ITC will become a promising approach for clarifying comprehensively the thermodynamics of protein folding and misfolding.
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Affiliation(s)
- Tatsuya Ikenoue
- aDivision of Protein Structural Biology, Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Young-Ho Lee
- aDivision of Protein Structural Biology, Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - József Kardos
- bDepartment of Biochemistry, Eötvös Loránd University, 1117, Budapest, Hungary; and
| | - Hisashi Yagi
- aDivision of Protein Structural Biology, Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Takahisa Ikegami
- aDivision of Protein Structural Biology, Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Hironobu Naiki
- cFaculty of Medical Sciences, University of Fukui, Fukui 910-1193, Japan
| | - Yuji Goto
- aDivision of Protein Structural Biology, Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
- 2To whom correspondence should be addressed. E-mail:
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