1
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Zhu J, Wang H, Liu S, Miao L, Dong H, Tong X, Jiang L. Complexes of soybean protein fibrils and chlorogenic acid: Interaction mechanism and antibacterial activity. Food Chem 2024; 452:139551. [PMID: 38723572 DOI: 10.1016/j.foodchem.2024.139551] [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: 12/27/2023] [Revised: 04/19/2024] [Accepted: 05/01/2024] [Indexed: 06/01/2024]
Abstract
This study explored the mechanism of interaction between chlorogenic acid (CA) and protein fibrils (PF) as well as the effects of varying the CA/PF concentration ratio on antibacterial activity. Analysis of various parameters, such as ζ-potential, thioflavin T fluorescence intensity, surface hydrophobicity, and free sulfhydryl groups, revealed that the interaction between PF and CA altered the structure of PF. Fluorescence analysis revealed that hydrogen bonding and hydrophobic interactions were the primary interaction forces causing conformational rearrangement, resulting in a shorter, more flexible, and thicker fibril structure, as observed through transmission electron microscopy. Fourier-transform infrared spectroscopy, small-angle X-ray scattering, and X-ray diffraction analyses revealed that the characteristic fibril structure was destroyed when the CA/PF ratio exceeded 0.05. Notably, the CA-PF complexes inhibited the growth of Escherichia coli and Staphylococcus aureus and also exhibited antioxidant activity. Overall, this study expands the application prospects of CA and PF in the food industry.
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Affiliation(s)
- Jianyu Zhu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Huan Wang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Shi Liu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Liming Miao
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Hongxia Dong
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Xiaohong Tong
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; College of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
| | - Lianzhou Jiang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; College of Food Science and Engineering, Hainan University, Haikou, Hainan 570228, China.
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2
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Alaziqi B, Beckitt L, Townsend DJ, Morgan J, Price R, Maerivoet A, Madine J, Rochester D, Akien G, Middleton DA. Characterization of Olive Oil Phenolic Extracts and Their Effects on the Aggregation of the Alzheimer's Amyloid-β Peptide and Tau. ACS OMEGA 2024; 9:32557-32578. [PMID: 39100310 PMCID: PMC11292642 DOI: 10.1021/acsomega.4c01281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 06/17/2024] [Accepted: 06/28/2024] [Indexed: 08/06/2024]
Abstract
The dietary consumption of extra virgin olive oil (EVOO) is believed to slow the progression of Alzheimer's disease (AD) symptoms. Its protective mechanisms are unclear, but specific EVOO phenolic compounds can individually impede the aggregation of amyloid-β (Aβ) peptides and the microtubule-associated protein tau, two important pathological manifestations of AD. It is unknown, however, whether the numerous and variable phenolic compounds that are consumed in dietary EVOO can collectively alter tau and Aβ aggregation as effectively as the individual compounds. The activity of these complex mixtures against Aβ and tau may be moderated by competition between active and nonactive phenolic components and by extensive derivatizations and isomerization. Here, phenolic mixtures extracted from two different EVOO sources are characterized and tested for how they modulate the aggregation of Aβ40 peptide and tau peptides in vitro. The chromatographic and NMR analysis of Greek and Saudi Arabian EVOO phenolic extracts reveals that they have different concentration profiles, and over 30 compounds are identified. Thioflavin T fluorescence and circular dichroism measurements show that relatively low concentrations (<20 μg/mL) of the Greek and Saudi extracts reduce the rate of Aβ40 aggregation and fibril mass, despite the extracts having different phenolic profiles. By contrast, the Greek extract reduces the rate of tau aggregation only at very high phenolic concentrations (>100 μg/mL). Most compounds in the extracts bind to preformed Aβ40 fibrils and release soluble Aβ oligomers that are mildly toxic to SH-SY5Y cells. Much higher (500 μg/mL) extract concentrations are required to remodel tau filaments into oligomers, and a minimal binding of phenolic compounds to the preformed filaments is observed. It is concluded that EVOO extracts having different phenol profiles are similarly capable of modulating Aβ40 aggregation and fibril morphology in vitro at relatively low concentrations but are less efficient at modulating tau aggregation. Over 2 M tonnes of EVOO are consumed globally each year as part of the Mediterranean diet, and the results here provide motivation for further clinical interrogation of the antiaggregation properties of EVOO as a potential protective mechanism against AD.
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Affiliation(s)
- Bakri Alaziqi
- Department
of Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom
- Department
of Chemistry, University College in Al-Qunfudah,
Umm Al-Qura University, Makkah
Al-Mukarramah 1109, Saudi
Arabia
| | - Liam Beckitt
- Department
of Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom
| | - David J. Townsend
- Department
of Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom
| | - Jasmine Morgan
- Department
of Biology, Edge Hill University, Ormskirk L39 4QP, United Kingdom
| | - Rebecca Price
- Department
of Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular
and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, United Kingdom
| | - Alana Maerivoet
- Department
of Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular
and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, United Kingdom
| | - Jillian Madine
- Department
of Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular
and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, United Kingdom
| | - David Rochester
- Department
of Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom
| | - Geoffrey Akien
- Department
of Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom
| | - David A. Middleton
- Department
of Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom
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3
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Gonçalves PB, Sodero ACR, Cordeiro Y. Natural products targeting amyloid-β oligomer neurotoxicity in Alzheimer's disease. Eur J Med Chem 2024; 276:116684. [PMID: 39032401 DOI: 10.1016/j.ejmech.2024.116684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Revised: 07/07/2024] [Accepted: 07/12/2024] [Indexed: 07/23/2024]
Abstract
Alzheimer's disease (AD) constitutes a major global health issue, characterized by progressive neurodegeneration and cognitive impairment, for which no curative treatment is currently available. Current therapeutic approaches are focused on symptom management, highlighting the critical need for disease-modifying therapy. The hallmark pathology of AD involves the aggregation and accumulation of amyloid-β (Aβ) peptides in the brain. Consequently, drug discovery efforts in recent decades have centered on the Aβ aggregation cascade, which includes the transition of monomeric Aβ peptides into toxic oligomers and, ultimately, mature fibrils. Historically, anti-Aβ strategies focused on the clearance of amyloid fibrils using monoclonal antibodies. However, substantial evidence has highlighted the critical role of Aβ oligomers (AβOs) in AD pathogenesis. Soluble AβOs are now recognized as more toxic than fibrils, directly contributing to synaptic impairment, neuronal damage, and the onset of AD. Targeting AβOs has emerged as a promising therapeutic approach to mitigate cognitive decline in AD. Natural products (NPs) have demonstrated promise against AβO neurotoxicity through various mechanisms, including preventing AβO formation, enhancing clearance mechanisms, or converting AβOs into non-toxic species. Understanding the mechanisms by which anti-AβO NPs operate is useful for developing disease-modifying treatments for AD. In this review, we explore the role of NPs in mitigating AβO neurotoxicity for AD drug discovery, summarizing key evidence from biophysical methods, cellular assays, and animal models. By discussing how NPs modulate AβO neurotoxicity across various experimental systems, we aim to provide valuable insights into novel therapeutic strategies targeting AβOs in AD.
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Affiliation(s)
| | | | - Yraima Cordeiro
- Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, 21949-900, Brazil
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4
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Loffredo M, Casciaro B, Bellavita R, Troiano C, Brancaccio D, Cappiello F, Merlino F, Galdiero S, Fabrizi G, Grieco P, Stella L, Carotenuto A, Mangoni ML. Strategic Single-Residue Substitution in the Antimicrobial Peptide Esc(1-21) Confers Activity against Staphylococcus aureus, Including Drug-Resistant and Biofilm Phenotype. ACS Infect Dis 2024; 10:2403-2418. [PMID: 38848266 PMCID: PMC11250030 DOI: 10.1021/acsinfecdis.4c00130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 05/21/2024] [Accepted: 05/22/2024] [Indexed: 06/09/2024]
Abstract
Staphylococcus aureus, a bacterium resistant to multiple drugs, is a significant cause of illness and death worldwide. Antimicrobial peptides (AMPs) provide an excellent potential strategy to cope with this threat. Recently, we characterized a derivative of the frog-skin AMP esculentin-1a, Esc(1-21) (1) that is endowed with potent activity against Gram-negative bacteria but poor efficacy against Gram-positive strains. In this study, three analogues of peptide 1 were designed by replacing Gly8 with α-aminoisobutyric acid (Aib), Pro, and dPro (2-4, respectively). The single substitution Gly8 → Aib8 in peptide 2 makes it active against the planktonic form of Gram-positive bacterial strains, especially Staphylococcus aureus, including multidrug-resistant clinical isolates, with an improved biostability without resulting in cytotoxicity to mammalian cells. Moreover, peptide 2 showed a higher antibiofilm activity than peptide 1 against both reference and clinical isolates of S. aureus. Peptide 2 was also able to induce rapid bacterial killing, suggesting a membrane-perturbing mechanism of action. Structural analysis of the most active peptide 2 evidenced that the improved biological activity of peptide 2 is the consequence of a combination of higher biostability, higher α helical content, and ability to reduce membrane fluidity and to adopt a distorted helix, bent in correspondence of Aib8. Overall, this study has shown how a strategic single amino acid substitution is sufficient to enlarge the spectrum of activity of the original peptide 1, and improve its biological properties for therapeutic purposes, thus paving the way to optimize AMPs for the development of new broad-spectrum anti-infective agents.
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Affiliation(s)
- Maria
Rosa Loffredo
- Department
of Biochemical Sciences, Laboratory Affiliated to Istituto Pasteur
Italia-Fondazione Cenci Bolognetti, Sapienza
University of Rome, 00185 Rome, Italy
| | - Bruno Casciaro
- Department
of Biochemical Sciences, Laboratory Affiliated to Istituto Pasteur
Italia-Fondazione Cenci Bolognetti, Sapienza
University of Rome, 00185 Rome, Italy
| | - Rosa Bellavita
- Department
of Pharmacy, University of Naples “Federico
II”, 80131 Naples, Italy
| | - Cassandra Troiano
- Department
of Chemical Science and Technologies, University
of Rome Tor Vergata, 00133 Rome, Italy
| | - Diego Brancaccio
- Department
of Pharmacy, University of Naples “Federico
II”, 80131 Naples, Italy
| | - Floriana Cappiello
- Department
of Biochemical Sciences, Laboratory Affiliated to Istituto Pasteur
Italia-Fondazione Cenci Bolognetti, Sapienza
University of Rome, 00185 Rome, Italy
| | - Francesco Merlino
- Department
of Pharmacy, University of Naples “Federico
II”, 80131 Naples, Italy
| | - Stefania Galdiero
- Department
of Pharmacy, University of Naples “Federico
II”, 80131 Naples, Italy
| | - Giancarlo Fabrizi
- Department
of Chemistry and Technology of Drugs, “Department of Excellence
2018−2022”, Sapienza University
of Rome, 00185 Rome, Italy
| | - Paolo Grieco
- Department
of Pharmacy, University of Naples “Federico
II”, 80131 Naples, Italy
| | - Lorenzo Stella
- Department
of Chemical Science and Technologies, University
of Rome Tor Vergata, 00133 Rome, Italy
| | - Alfonso Carotenuto
- Department
of Pharmacy, University of Naples “Federico
II”, 80131 Naples, Italy
| | - Maria Luisa Mangoni
- Department
of Biochemical Sciences, Laboratory Affiliated to Istituto Pasteur
Italia-Fondazione Cenci Bolognetti, Sapienza
University of Rome, 00185 Rome, Italy
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5
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Sammani PKT, Yospanya W, Niwa T, Kohata A, Taguchi H, Kinbara K. Monitoring insulin fibrillation kinetics using chromatographic analysis. Int J Biol Macromol 2024; 275:133660. [PMID: 38969030 DOI: 10.1016/j.ijbiomac.2024.133660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 06/21/2024] [Accepted: 07/02/2024] [Indexed: 07/07/2024]
Abstract
Insulin is a small protein widely used to treat patients with diabetes and is a commonly used model for protein fibrillation studies. Under specific conditions, such as low pH and high temperature, insulin monomers aggregate to form fibrils. This aggregation is problematic for manufacturing and storage of insulin. The thioflavin T (ThT) assay is commonly used to study amyloid fibrillation but suffers from several limitations, such as the effect of protein concentration, the size of the amyloid fibrillar bundles, competitive binding, and fibril aggregation, all of which hinder precise quantitative analysis. Here, we present a method for studying the kinetics of insulin fibrillation utilizing ultra-performance liquid chromatography (UPLC). This method enables the quantitative detection of soluble insulin components, including chemically modified components. The formation of a deamidated species could be monitored at the early stage of fibrillation, and this species was likely included in the fibrils. In addition, in the presence of inhibitors known to compete with ThT for binding to fibrils, UPLC analysis showed the disappearance of soluble components even though the ThT assay did not indicate the presence of fibrils. These results suggest that the UPLC-based analysis presented here can complement the ThT assay for investigating the kinetics of protein fibrillation.
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Affiliation(s)
| | - Wijak Yospanya
- School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan.
| | - Tatsuya Niwa
- Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan
| | - Ai Kohata
- School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan
| | - Hideki Taguchi
- Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan
| | - Kazushi Kinbara
- School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan; Research Center for Autonomous Systems Materialogy (ASMat), Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan.
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6
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Singh A, Rakshit D, Kumar A, Mishra A, Shukla R. Formulation and Characterization of Silibinin Entrapped Nano-Liquid Crystals for Activity against Aβ 1-42 Neurotoxicity in In-Vivo Model. AAPS PharmSciTech 2024; 25:149. [PMID: 38954224 DOI: 10.1208/s12249-024-02859-x] [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: 02/07/2024] [Accepted: 05/31/2024] [Indexed: 07/04/2024] Open
Abstract
Silibinin (SIL) Encapsulated Nanoliquid Crystalline (SIL-NLCs) particles were prepared to study neuroprotective effect against amyloid beta (Aβ1-42) neurotoxicity in Balb/c mice model. Theses NLCs were prepared through hot emulsification and probe sonication technique. The pharmacodynamics was investigatigated on Aβ1-42 intracerebroventricular (ICV) injected Balb/c mice. The particle size, zeta potential and drug loading were optimized to be 153 ± 2.5 nm, -21 mV, and 8.2%, respectively. Small angle X-ray (SAXS) and electron microscopy revealed to crystalline shape of SIL-NLCs. Thioflavin T (ThT) fluroscence and circular dichroism (CD) technique were employed to understand monomer inhibition effect of SIL-NLCs on Aβ1-4. In neurobehavioral studies, SIL-NLCs exhibited enhanced mitigation of memory impairment induced on by Aβ1-42 in T-maze and new object recognition test (NORT). Whereas biochemical and histopathological estimation of brain samples showed reduction in level of Aβ1-42 aggregate, acetylcholine esterase (ACHE) and reactive oxygen species (ROS). SIL-NLCs treated animal group showed higher protection against Aβ1-42 toxicity compared to free SIL and Donopezil (DPZ). Therefore SIL-NLCs promises great prospect in neurodegenerative diseases such as Alzheimer's disease.
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Affiliation(s)
- Ajit Singh
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER)-Raebareli, Lucknow, Uttar Pradesh, 226002, India
| | - Debarati Rakshit
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam-781101, India
| | - Ankit Kumar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam-781101, India
| | - Awanish Mishra
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam-781101, India
| | - Rahul Shukla
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER)-Raebareli, Lucknow, Uttar Pradesh, 226002, India.
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7
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Leimu L, Holm P, Gąciarz A, Haavisto O, Prince S, Pesonen U, Huovinen T, Lamminmäki U. Epitope-specific antibody fragments block aggregation of AGelD187N, an aberrant peptide in gelsolin amyloidosis. J Biol Chem 2024; 300:107507. [PMID: 38944121 DOI: 10.1016/j.jbc.2024.107507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 06/10/2024] [Accepted: 06/21/2024] [Indexed: 07/01/2024] Open
Abstract
Aggregation of aberrant fragment of plasma gelsolin, AGelD187N, is a crucial event underlying the pathophysiology of Finnish gelsolin amyloidosis, an inherited form of systemic amyloidosis. The amyloidogenic gelsolin fragment AGelD187N does not play any physiological role in the body, unlike most aggregating proteins related to other protein misfolding diseases. However, no therapeutic agents that specifically and effectively target and neutralize AGelD187N exist. We used phage display technology to identify novel single-chain variable fragments that bind to different epitopes in the monomeric AGelD187N that were further maturated by variable domain shuffling and converted to antigen-binding fragment (Fab) antibodies. The generated antibody fragments had nanomolar binding affinity for full-length AGelD187N, as evaluated by biolayer interferometry. Importantly, all four Fabs selected for functional studies efficiently inhibited the amyloid formation of full-length AGelD187N as examined by thioflavin fluorescence assay and transmission electron microscopy. Two Fabs, neither of which bound to the previously proposed fibril-forming region of AGelD187N, completely blocked the amyloid formation of AGelD187N. Moreover, no small soluble aggregates, which are considered pathogenic species in protein misfolding diseases, were formed after successful inhibition of amyloid formation by the most promising aggregation inhibitor, as investigated by size-exclusion chromatography combined with multiangle light scattering. We conclude that all regions of the full-length AGelD187N are important in modulating its assembly into fibrils and that the discovered epitope-specific anti-AGelD187N antibody fragments provide a promising starting point for a disease-modifying therapy for gelsolin amyloidosis, which is currently lacking.
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Affiliation(s)
- Laura Leimu
- R&D, Orion Pharma, Orion Corporation, Turku, Finland; Faculty of Medicine, Institute of Biomedicine, University of Turku, Turku, Finland.
| | - Patrik Holm
- R&D, Orion Pharma, Orion Corporation, Turku, Finland; Department of Life Technologies, University of Turku, Turku, Finland; Organon R&D Finland, Turku, Finland
| | - Anna Gąciarz
- R&D, Orion Pharma, Orion Corporation, Turku, Finland; Mobidiag, A Hologic Company, Espoo, Finland
| | - Oskar Haavisto
- Department of Life Technologies, University of Turku, Turku, Finland
| | - Stuart Prince
- R&D, Orion Pharma, Orion Corporation, Turku, Finland; MediCity Research Laboratory, University of Turku, Turku, Finland
| | - Ullamari Pesonen
- Faculty of Medicine, Institute of Biomedicine, University of Turku, Turku, Finland
| | - Tuomas Huovinen
- Department of Life Technologies, University of Turku, Turku, Finland
| | - Urpo Lamminmäki
- Department of Life Technologies, University of Turku, Turku, Finland.
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8
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Flint Z, Grannemann H, Baffour K, Koti N, Taylor E, Grier E, Sutton C, Johnson D, Dandawate P, Patel R, Santra S, Banerjee T. Mechanistic Insights Behind the Self-Assembly of Human Insulin under the Influence of Surface-Engineered Gold Nanoparticles. ACS Chem Neurosci 2024; 15:2359-2371. [PMID: 38728258 PMCID: PMC11157486 DOI: 10.1021/acschemneuro.4c00226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 04/30/2024] [Accepted: 05/01/2024] [Indexed: 05/12/2024] Open
Abstract
Elucidating the underlying principles of amyloid protein self-assembly at nanobio interfaces is extremely challenging due to the diversity in physicochemical properties of nanomaterials and their physical interactions with biological systems. It is, therefore, important to develop nanoscale materials with dynamic features and heterogeneities. In this work, through engineering of hierarchical polyethylene glycol (PEG) structures on gold nanoparticle (GNP) surfaces, tailored nanomaterials with different surface properties and conformations (GNPs-PEG) are created for modulating the self-assembly of a widely studied protein, insulin, under amyloidogenic conditions. Important biophysical studies including thioflavin T (ThT) binding, circular dichroism (CD), surface plasmon resonance (SPR), and atomic force microscopy (AFM) showed that higher-molecular weight GNPs-PEG triggered the formation of amyloid fibrils by promoting adsorption of proteins at nanoparticle surfaces and favoring primary nucleation rate. Moreover, the modulation of fibrillation kinetics reduces the overall toxicity of insulin oligomers and fibrils. In addition, the interaction between the PEG polymer and amyloidogenic insulin examined using MD simulations revealed major changes in the secondary structural elements of the B chain of insulin. The experimental findings provide molecular-level descriptions of how the PEGylated nanoparticle surface modulates protein adsorption and drives the self-assembly of insulin. This facile approach provides a new avenue for systematically altering the binding affinities on nanoscale surfaces by tailoring their topologies for examining adsorption-induced fibrillogenesis phenomena of amyloid proteins. Together, this study suggests the role of nanobio interfaces during surface-induced heterogeneous nucleation as a primary target for designing therapeutic interventions for amyloid-related neurodegenerative disorders.
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Affiliation(s)
- Zachary Flint
- Department
of Chemistry and Biochemistry, Missouri
State University, 901 S. National Avenue, Springfield, Missouri 65897, United States
| | - Haylee Grannemann
- Department
of Chemistry and Biochemistry, Missouri
State University, 901 S. National Avenue, Springfield, Missouri 65897, United States
| | - Kristos Baffour
- Department
of Chemistry and Biochemistry, Missouri
State University, 901 S. National Avenue, Springfield, Missouri 65897, United States
| | - Neelima Koti
- Department
of Chemistry and Biochemistry, Missouri
State University, 901 S. National Avenue, Springfield, Missouri 65897, United States
| | - Emma Taylor
- Department
of Chemistry and Biochemistry, Missouri
State University, 901 S. National Avenue, Springfield, Missouri 65897, United States
| | - Ethan Grier
- Department
of Chemistry and Biochemistry, Missouri
State University, 901 S. National Avenue, Springfield, Missouri 65897, United States
| | - Carissa Sutton
- Department
of Chemistry and Biochemistry, Missouri
State University, 901 S. National Avenue, Springfield, Missouri 65897, United States
| | - David Johnson
- Molecular
Graphics and Modeling Laboratory, University
of Kansas, 2034 Becker
Drive, Lawrence, Kansas 66018, United States
| | - Prasad Dandawate
- Department
of Cancer Biology, The University of Kansas
Medical Center, Kansas City, Kansas 66160, United States
| | - Rishi Patel
- Jordan
Valley Innovation Center, Missouri State
University, 542 N. Boonville
Avenue, Springfield, Missouri 65806, United States
| | - Santimukul Santra
- Department
of Chemistry and Biochemistry, Missouri
State University, 901 S. National Avenue, Springfield, Missouri 65897, United States
| | - Tuhina Banerjee
- Department
of Chemistry and Biochemistry, Missouri
State University, 901 S. National Avenue, Springfield, Missouri 65897, United States
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9
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Biedrzycki G, Wolszczak-Biedrzycka B, Dorf J, Michalak D, Żendzian-Piotrowska M, Zalewska A, Maciejczyk M. The antiglycation potential of H1 receptor antagonists - in vitro studies in bovine serum albumin model and in silico molecular docking analyses. Biomed Pharmacother 2024; 175:116632. [PMID: 38663107 DOI: 10.1016/j.biopha.2024.116632] [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: 03/08/2024] [Accepted: 04/17/2024] [Indexed: 06/03/2024] Open
Abstract
The H1 receptor belongs to the family of rhodopsin-like G-protein-coupled receptors activated by the biogenic amine histamine. H1 receptor antagonists are widely used in the treatment of allergies. However, these drugs could have a much broader spectrum of activity, including hypoglycemic effects, which can broaden the spectrum of their use. The aim of the study was to evaluate the antiglycation potential of twelve H1 receptor antagonists (diphenhydramine, antazoline, promethazine, ketotifen, clemastine, pheniramine, cetirizine, levocetirizine, bilastine, fexofenadine, desloratadine, and loratadine). Bovine serum albumin (BSA) was glycated with sugars (glucose, fructose, galactose, and ribose) and aldehydes (glyoxal and methylglyoxal) in the presence of H1 blockers. The tested substances did not induce a significant decrease in the content of albumin glycation end-products, and the inhibition rate of glycoxidation was not influenced by the chemical structure or generation of H1 blockers. None of the tested H1 receptor antagonists exhibited strong antiglycation activity. Antiglycemic potential of H1 blockers could be attributed to their antioxidant and anti-inflammatory activity, as well as their effects on carbohydrate metabolism/metabolic balance at the systemic level.
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Affiliation(s)
| | - Blanka Wolszczak-Biedrzycka
- Department of Psychology and Sociology of Health and Public Health, University of Warmia and Mazury in Olsztyn, Poland
| | - Justyna Dorf
- Department of Clinical Laboratory Diagnostics, Medical University of Bialystok, Poland
| | - Daniel Michalak
- "Biochemistry of Civilization Diseases" Student Scientific Club at the Department of Hygiene, Epidemiology and Ergonomics, Medical University of Bialystok, Poland
| | | | - Anna Zalewska
- Experimental Dentistry Laboratory, Medical University of Bialystok, ul. M. Sklodowskiej-Curie 24a, Bialystok 15-274, Poland
| | - Mateusz Maciejczyk
- Department of Hygiene, Epidemiology and Ergonomics, Medical University of Bialystok, Poland.
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10
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Burgener K, Lichtenberg SS, Walsh DP, Inzalaco HN, Lomax A, Pedersen JA. Prion Seeding Activity in Plant Tissues Detected by RT-QuIC. Pathogens 2024; 13:452. [PMID: 38921750 PMCID: PMC11206635 DOI: 10.3390/pathogens13060452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/09/2024] [Accepted: 05/24/2024] [Indexed: 06/27/2024] Open
Abstract
Prion diseases such as scrapie, bovine spongiform encephalopathy (BSE), and chronic wasting disease (CWD) affect domesticated and wild herbivorous mammals. Animals afflicted with CWD, the transmissible spongiform encephalopathy of cervids (deer, elk, and moose), shed prions into the environment, where they may persist and remain infectious for years. These environmental prions may remain in soil, be transported in surface waters, or assimilated into plants. Environmental sampling is an emerging area of TSE research and can provide more information about prion fate and transport once shed by infected animals. In this study, we have developed the first published method for the extraction and detection of prions in plant tissue using the real-time quaking-induced conversion (RT-QuIC) assay. Incubation with a zwitterionic surfactant followed by precipitation with sodium phosphotungstate concentrates the prions within samples and allows for sensitive detection of prion seeding activity. Using this protocol, we demonstrate that prions can be detected within plant tissues and on plant surfaces using the RT-QuIC assay.
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Affiliation(s)
- Kate Burgener
- Molecular and Environmental Toxicology Program, University of Wisconsin-Madison, Madison, WI 53706, USA; (K.B.)
- Department of Environmental Health and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Stuart Siegfried Lichtenberg
- Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN 55108, USA
- Minnesota Center for Prion Research and Outreach, University of Minnesota, St. Paul, MN 55108, USA
| | - Daniel P. Walsh
- U.S. Geological Survey, Montana Cooperative Wildlife Research Unit, University of Montana, Missoula, MT 59812, USA
| | - Heather N. Inzalaco
- Wisconsin Cooperative Wildlife Research Unit, Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Aaron Lomax
- Department of Soil Science, University of Wisconsin-Madison, Madison, WI 53706, USA;
- Varizymes, Middleton, WI 53562, USA
| | - Joel A. Pedersen
- Molecular and Environmental Toxicology Program, University of Wisconsin-Madison, Madison, WI 53706, USA; (K.B.)
- Department of Environmental Health and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Soil Science, University of Wisconsin-Madison, Madison, WI 53706, USA;
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11
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Singh SL, Bhat R. Cyclic-NDGA Effectively Inhibits Human γ-Synuclein Fibrillation, Forms Nontoxic Off-Pathway Species, and Disintegrates Preformed Mature Fibrils. ACS Chem Neurosci 2024; 15:1770-1786. [PMID: 38637513 DOI: 10.1021/acschemneuro.3c00793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024] Open
Abstract
Parkinson's disease arises from protein misfolding, aggregation, and fibrillation and is characterized by LB (Lewy body) deposits, which contain the protein α-synuclein (α-syn) as their major component. Another synuclein, γ-synuclein (γ-syn), coexists with α-syn in Lewy bodies and is also implicated in various types of cancers, especially breast cancer. It is known to seed α-syn fibrillation after its oxidation at methionine residue, thereby contributing in synucleinopathy. Despite its involvement in synucleinopathy, the search for small molecule inhibitors and modulators of γ-syn fibrillation remains largely unexplored. This work reveals the modulatory properties of cyclic-nordihydroguaiaretic acid (cNDGA), a natural polyphenol, on the structural and aggregational properties of human γ-syn employing various biophysical and structural tools, namely, thioflavin T (ThT) fluorescence, Rayleigh light scattering, 8-anilinonaphthalene-1-sulfonic acid binding, far-UV circular dichroism (CD), Fourier transform infrared spectroscopy (FTIR) spectroscopy, atomic force microscopy, ITC, molecular docking, and MTT-toxicity assay. cNDGA was observed to modulate the fibrillation of γ-syn to form off-pathway amorphous species that are nontoxic in nature at as low as 75 μM concentration. The modulation is dependent on oxidizing conditions, with cNDGA weakly interacting (Kd ∼10-5 M) with the residues at the N-terminal of γ-syn protein as investigated by isothermal titration calorimetry and molecular docking, respectively. Increasing cNDGA concentration results in an increased recovery of monomeric γ-syn as shown by sodium dodecyl sulfate and native-polyacrylamide gel electrophoresis. The retention of native structural properties of γ-syn in the presence of cNDGA was further confirmed by far-UV CD and FTIR. In addition, cNDGA is most effective in suppression of fibrillation when added at the beginning of the fibrillation kinetics and is also capable of disintegrating the preformed mature fibrils. These findings could, therefore, pave the ways for further exploring cNDGA as a potential therapeutic against γ-synucleinopathies.
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Affiliation(s)
- Sneh Lata Singh
- School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India
| | - Rajiv Bhat
- School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India
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12
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Singh A, Verma A, Bhardwaj B, Saraf P, Kumar H, Jain N, Waiker DK, Gajendra TA, Krishnamurthy S, Shrivastava SK. Structure-Guided Design, Synthesis, and Biological Evaluation of Peripheral Anionic Site Selective and Brain Permeable Novel Oxadiazole-Piperazine Conjugates against Alzheimer's Disease with Antioxidant Potential. ACS OMEGA 2024; 9:18169-18182. [PMID: 38680351 PMCID: PMC11044217 DOI: 10.1021/acsomega.3c10276] [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: 12/22/2023] [Revised: 03/20/2024] [Accepted: 03/22/2024] [Indexed: 05/01/2024]
Abstract
Alzheimer's disease (AD) is a multifactorial and emerging neurological disorder, which has invoked researchers to develop multitargeted ligands. Herein, hybrid conjugates of 5-phenyl-1,3,4-oxadiazole and piperazines were rationally designed, synthesized, and pharmacologically evaluated against hAChE, hBChE, and hBACE-1 enzymes for the management of AD. Among the series, compound 5AD comprising pyridyl substitution at terminal nitrogen of piperazine contemplated as a paramount lead compound (hAChE, IC50 = 0.103 ± 0.0172 μM, hBChE, IC50 ≥ 10 μM, and hBACE-1, IC50 = 1.342 ± 0.078 μM). Compound 5AD showed mixed-type enzyme inhibition in enzyme kinetic studies against the hAChE enzyme. In addition, compound 5AD revealed a significant displacement of propidium iodide from the peripheral anionic site (PAS) of hAChE and excellent blood-brain barrier (BBB) permeability in a parallel artificial membrane permeation assay (PAMPA). Besides, 5AD also exhibited anti-Aβ aggregation activity in self- and AChE-induced thioflavin T assay. Further, compound 5AD has shown significant improvement in learning and memory (p < 0.001) against the in vivo scopolamine-induced cognitive dysfunction mice model. The ex vivo study implied that after treatment with compound 5AD, there was a decrease in AChE and malonaldehyde (MDA) levels with an increase in catalase (CAT, oxidative biomarkers) in the hippocampal brain homogenate. Hence, compound 5AD could be regarded as a lead compound and further be explored in the treatment of AD.
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Affiliation(s)
- Abhinav Singh
- Pharmaceutical
Chemistry Research Laboratory, Department of Pharmaceutical Engineering
& Technology, Indian Institute of Technology,
(Banaras Hindu University), Varanasi 221005, India
| | - Akash Verma
- Pharmaceutical
Chemistry Research Laboratory, Department of Pharmaceutical Engineering
& Technology, Indian Institute of Technology,
(Banaras Hindu University), Varanasi 221005, India
| | - Bhagwati Bhardwaj
- Pharmaceutical
Chemistry Research Laboratory, Department of Pharmaceutical Engineering
& Technology, Indian Institute of Technology,
(Banaras Hindu University), Varanasi 221005, India
| | - Poorvi Saraf
- Pharmaceutical
Chemistry Research Laboratory, Department of Pharmaceutical Engineering
& Technology, Indian Institute of Technology,
(Banaras Hindu University), Varanasi 221005, India
| | - Hansal Kumar
- Pharmaceutical
Chemistry Research Laboratory, Department of Pharmaceutical Engineering
& Technology, Indian Institute of Technology,
(Banaras Hindu University), Varanasi 221005, India
| | - Nishi Jain
- Pharmaceutical
Chemistry Research Laboratory, Department of Pharmaceutical Engineering
& Technology, Indian Institute of Technology,
(Banaras Hindu University), Varanasi 221005, India
| | - Digambar Kumar Waiker
- Pharmaceutical
Chemistry Research Laboratory, Department of Pharmaceutical Engineering
& Technology, Indian Institute of Technology,
(Banaras Hindu University), Varanasi 221005, India
| | - T A Gajendra
- Neurotherapeutics
Research Laboratory, Department of Pharmaceutical Engineering &
Technology, Indian Institute of Technology,
(Banaras Hindu University), Varanasi 221005, India
| | - Sairam Krishnamurthy
- Neurotherapeutics
Research Laboratory, Department of Pharmaceutical Engineering &
Technology, Indian Institute of Technology,
(Banaras Hindu University), Varanasi 221005, India
| | - Sushant K. Shrivastava
- Pharmaceutical
Chemistry Research Laboratory, Department of Pharmaceutical Engineering
& Technology, Indian Institute of Technology,
(Banaras Hindu University), Varanasi 221005, India
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13
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Daniel G, Hilan G, Ploeg L, Sabatino D. Self-assembly of amphiphilic helical-coiled peptide nanofibers and inhibition of fibril formation with curcumin. Bioorg Med Chem Lett 2024; 102:129682. [PMID: 38432287 DOI: 10.1016/j.bmcl.2024.129682] [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: 12/18/2023] [Revised: 02/06/2024] [Accepted: 02/28/2024] [Indexed: 03/05/2024]
Abstract
Amphiphilic peptide sequences are conducive to secondary structures that self-assemble into higher-ordered peptide nanostructures. A select set of amphiphilic polycationic peptides displayed stable helical-coiled structures that self-assembled into peptide nanofibers. The progression of peptide fibril formation revealed short protofibrils that extended into thin filaments and into an entangled network of nanofibers over an extended (5 days) incubation period. Ligand binding with 8-anilinonaphthalene-1-sulfonic acid (ANS) and Congo Red (CR) confirmed the amphiphilic helical-coiled peptide structure assembly into nanofibers, whereas curcumin treatment led to inhibition of fibril formation. Considering the vast repertoire of fibrous biomaterials and peptide or protein (mis)folding contingent on fibril formation, this work relates the molecular interplay in between sequence composition, structural folding and the ligand binding events impacting peptide self-assembly into nanofibers.
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Affiliation(s)
- Grace Daniel
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada; Institute of Biochemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada
| | - George Hilan
- Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada
| | - Lisa Ploeg
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada
| | - David Sabatino
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada; Institute of Biochemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada.
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14
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Sharma K, Sharma M. Invitro anti-biofilm activity and the artificial chaperone activity of quinoline-based ionic liquids. Colloids Surf B Biointerfaces 2024; 235:113773. [PMID: 38350204 DOI: 10.1016/j.colsurfb.2024.113773] [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: 12/03/2023] [Revised: 01/19/2024] [Accepted: 01/28/2024] [Indexed: 02/15/2024]
Abstract
The maintenance of protein conformation under stressful conditions is one of the prevailing challenges. This has led to a rapid growth in the ingenious protein therapies, in the past few decades, prioritizing the investigation of the structure and function of proteins in novel environments. Ionic Liquids (ILs) are currently dominating the biomedical industry, by endowing great solubility and stability to bio-molecules, especially proteins. Recently, researchers have devoted their attention towards the artificial chaperone activity of several classes of ILs. Thus, comprehending the long-term as well as momentary stability of protein conformation in IL formulations is an absolute necessity. In this context, we present the activity of quinoline-based ionic liquids (ILs) as artificial cheperones against time-dependent, self induced fibril formation in Bovine Serum Albumin (BSA). Herein, a series of quinoline-based ILs were synthesized and characterized. The structural and morphological changes induced in BSA in the presence and absence of these ILs are corroborated using several spectroscopic measurements and in-silico studies. The anti-microbial and antibiofilm activity of these compounds demonstrating their medicinal properties is substantiated in this study. Furthermore, the present research also gives an account of the toxicity of these compounds under in vivo conditions, using C. elegans as the model organism.
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Affiliation(s)
- Kajal Sharma
- Molecular Genetics of Aging, Dr. B.R. Ambedkar Center for Biomedical Research (ACBR), University of Delhi (North Campus), Delhi 110007, India
| | - Meenakshi Sharma
- Molecular Genetics of Aging, Dr. B.R. Ambedkar Center for Biomedical Research (ACBR), University of Delhi (North Campus), Delhi 110007, India.
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15
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Farzadfard A, Kunka A, Mason TO, Larsen JA, Norrild RK, Dominguez ET, Ray S, Buell AK. Thermodynamic characterization of amyloid polymorphism by microfluidic transient incomplete separation. Chem Sci 2024; 15:2528-2544. [PMID: 38362440 PMCID: PMC10866369 DOI: 10.1039/d3sc05371g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 01/05/2024] [Indexed: 02/17/2024] Open
Abstract
Amyloid fibrils of proteins such as α-synuclein are a hallmark of neurodegenerative diseases and much research has focused on their kinetics and mechanisms of formation. The question as to the thermodynamic stability of such structures has received much less attention. Here, we newly utilize the principle of transient incomplete separation of species in laminar flow in combination with chemical depolymerization for the quantification of amyloid fibril stability. The relative concentrations of fibrils and monomer at equilibrium are determined through an in situ separation of these species based on their different diffusivity inside a microfluidic capillary. The method is highly sample economical, using much less than a microliter of sample per data point and its only requirement is the presence of aromatic residues (W, Y) because of its label-free nature, which makes it widely applicable. Using this method, we investigate the differences in thermodynamic stability between different fibril polymorphs of α-synuclein and quantify these differences for the first time. Importantly, we show that fibril formation can be under kinetic or thermodynamic control and that a change in solution conditions can both stabilise and destabilise amyloid fibrils. Taken together, our results establish the thermodynamic stability as a well-defined and key parameter that can contribute towards a better understanding of the physiological roles of amyloid fibril polymorphism.
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Affiliation(s)
- Azad Farzadfard
- Protein Biophysics Group, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 227, Kgs. Lyngby 2800 Denmark
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Antonin Kunka
- Protein Biophysics Group, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 227, Kgs. Lyngby 2800 Denmark
| | - Thomas Oliver Mason
- Protein Biophysics Group, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 227, Kgs. Lyngby 2800 Denmark
| | - Jacob Aunstrup Larsen
- Protein Biophysics Group, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 227, Kgs. Lyngby 2800 Denmark
| | - Rasmus Krogh Norrild
- Protein Biophysics Group, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 227, Kgs. Lyngby 2800 Denmark
| | - Elisa Torrescasana Dominguez
- Protein Biophysics Group, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 227, Kgs. Lyngby 2800 Denmark
| | - Soumik Ray
- Protein Biophysics Group, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 227, Kgs. Lyngby 2800 Denmark
| | - Alexander K Buell
- Protein Biophysics Group, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 227, Kgs. Lyngby 2800 Denmark
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16
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Dahdah A, de Silva NH, Maniam S, Blanch EW. Characterizing fibril morphological changes by spirooxindoles for neurodegenerative disease application. Analyst 2024; 149:1229-1237. [PMID: 38224234 DOI: 10.1039/d3an01773g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
Fibrillation of proteins and polypeptides, which leads to the deposition of plaques in cells and tissues has been widely associated with many neuropathological diseases. Inhibition of protein misfolding and aggregation is crucial for the prevention and treatment of these conditions. The growing interest in identifying inhibitor molecules to prevent the formation of fibrils in vivo has led to the results highlighted in this study. Due to their hydrophobic structure and potential to readily cross the blood brain barrier, a library of spirooxindole compounds were synthesized with those labelled Hd-63, Hd-66 and Hd-74 proving to be the most potent against fibril formation. Our spectroscopic analysis provides detailed insight, that the introduction of these spirooxindole compounds leads to morphological changes in the mechanism of fibril formation which prevent the formation of highly ordered fibrils, instead results in the formation of disordered aggregates which are not fibrillar in nature.
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Affiliation(s)
- Anthony Dahdah
- School of Science, STEM College, RMIT University, 124 La Trobe Street, Melbourne, VIC, 3001, Australia.
| | - Nilamuni H de Silva
- School of Science, STEM College, RMIT University, 124 La Trobe Street, Melbourne, VIC, 3001, Australia.
| | - Subashani Maniam
- School of Science, STEM College, RMIT University, 124 La Trobe Street, Melbourne, VIC, 3001, Australia.
| | - Ewan W Blanch
- School of Science, STEM College, RMIT University, 124 La Trobe Street, Melbourne, VIC, 3001, Australia.
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17
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Galkin M, Priss A, Kyriukha Y, Shvadchak V. Navigating α-Synuclein Aggregation Inhibition: Methods, Mechanisms, and Molecular Targets. CHEM REC 2024; 24:e202300282. [PMID: 37919046 DOI: 10.1002/tcr.202300282] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 10/08/2023] [Indexed: 11/04/2023]
Abstract
Parkinson's disease is a yet incurable, age-related neurodegenerative disorder characterized by the aggregation of small neuronal protein α-synuclein into amyloid fibrils. Inhibition of this process is a prospective strategy for developing a disease-modifying treatment. We overview here small molecule, peptide, and protein inhibitors of α-synuclein fibrillization reported to date. Special attention was paid to the specificity of inhibitors and critical analysis of their action mechanisms. Namely, the importance of oxidation of polyphenols and cross-linking of α-synuclein into inhibitory dimers was highlighted. We also compared strategies of targeting monomeric, oligomeric, and fibrillar α-synuclein species, thoroughly discussed the strong and weak sides of different approaches to testing the inhibitors.
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Affiliation(s)
- Maksym Galkin
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Anastasiia Priss
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Yevhenii Kyriukha
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, Saint Louis, Missouri, 63110, United States
| | - Volodymyr Shvadchak
- Department of Biochemistry and Biotechnology, Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
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18
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Akbari V, Ghobadi S. Evaluation of the effect of phenylpropanoids on the binding of heparin to human serum albumin and glycosylated human serum albumin concerning anticoagulant activity: A comparison study. Int J Biol Macromol 2024; 257:128732. [PMID: 38092116 DOI: 10.1016/j.ijbiomac.2023.128732] [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: 07/03/2023] [Revised: 12/06/2023] [Accepted: 12/08/2023] [Indexed: 12/19/2023]
Abstract
The nonenzymatic advanced glycation end products (AGEs) and the accumulation of AGEs are the two main factors associated with the long-term pathogenesis of diabetes. Human serum albumin (HSA) as the most abundant serum protein has a higher fortuity to be modified by nonenzymatic glycation. In this study, the interaction of three phenylpropanoids (caffeic acid (Caf), p-coumaric acid (Cou), and cinnamic acid (Cin)) toward HSA and glycosylated HSA (gHSA) was analyzed by multiple spectroscopic techniques combined with molecular docking. The formation of fibrils in HSA and gHSA was confirmed by the Thioflavin T (ThT) assay. The phenylpropanoids have shown anti-fibrillation properties in vitro. The obtained thermodynamic parameters indicated that hydrogen bonding and van der Waals forces are the main forces in the binding interaction, and the quenching mechanism of the protein fluorescence is static. Molecular docking results, as well as the in vitro results, showed that Caf, Cou, and Cin exhibit more stable interactions with HSA, respectively. In addition, molecular docking analysis showed that Caf and Cou interact well with K199. Given the critical role of K199 in HSA glycosylation in diabetic patients, this process inhibits the interaction of stabilizer compounds and thus accelerates gHSA aggregation.
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Affiliation(s)
- Vali Akbari
- Department of Biology, Faculty of Sciences, Razi University, Kermanshah, Iran.
| | - Sirous Ghobadi
- Department of Biology, Faculty of Sciences, Razi University, Kermanshah, Iran.
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19
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Balasco N, Altamura D, Scognamiglio PL, Sibillano T, Giannini C, Morelli G, Vitagliano L, Accardo A, Diaferia C. Self-Assembled Materials Based on Fully Aromatic Peptides: The Impact of Tryptophan, Tyrosine, and Dopa Residues. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:1470-1486. [PMID: 38174846 PMCID: PMC10795196 DOI: 10.1021/acs.langmuir.3c03214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/13/2023] [Accepted: 12/18/2023] [Indexed: 01/05/2024]
Abstract
Peptides are able to self-organize in structural elements including cross-β structures. Taking advantage of this tendency, in the last decades, peptides have been scrutinized as molecular elements for the development of multivalent supramolecular architectures. In this context, different classes of peptides, also with completely aromatic sequences, were proposed. Our previous studies highlighted that the (FY)3 peptide, which alternates hydrophobic phenylalanine and more hydrophilic tyrosine residues, is able to self-assemble, thanks to the formation of both polar and apolar interfaces. It was observed that the replacement of Phe and Tyr residues with other noncoded aromatic amino acids like 2-naphthylalanine (Nal) and Dopa affects the interactions among peptides with consequences on the supramolecular organization. Herein, we have investigated the self-assembling behavior of two novel (FY)3 analogues with Trp and Dopa residues in place of the Phe and Tyr ones, respectively. Additionally, PEGylation of the N-terminus was analyzed too. The supramolecular organization, morphology, and capability to gel were evaluated using complementary techniques, including fluorescence, Fourier transform infrared spectroscopy, and scanning electron microscopy. Structural periodicities along and perpendicular to the fiber axis were detected by grazing incidence wide-angle X-ray scattering. Finally, molecular dynamics studies provided interesting insights into the atomic structure of the cross-β that constitutes the basic motif of the assemblies formed by these novel peptide systems.
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Affiliation(s)
- Nicole Balasco
- Institute
of Molecular Biology and Pathology, CNR, Piazzale Aldo Moro 5, Rome 00185, Italy
| | - Davide Altamura
- Institute
of Crystallography (IC), CNR, Via Amendola 122, Bari 70126, Italy
| | | | - Teresa Sibillano
- Institute
of Crystallography (IC), CNR, Via Amendola 122, Bari 70126, Italy
| | - Cinzia Giannini
- Institute
of Crystallography (IC), CNR, Via Amendola 122, Bari 70126, Italy
| | - Giancarlo Morelli
- Department
of Pharmacy and CIRPeB, Research Centre on Bioactive Peptides “Carlo
Pedone”, University of Naples “Federico
II”, Via Montesano 49, Naples 80131, Italy
| | - Luigi Vitagliano
- Institute
of Biostructures and Bioimaging (IBB), CNR, Via Castellino 111, Naples 80131, Italy
| | - Antonella Accardo
- Department
of Pharmacy and CIRPeB, Research Centre on Bioactive Peptides “Carlo
Pedone”, University of Naples “Federico
II”, Via Montesano 49, Naples 80131, Italy
| | - Carlo Diaferia
- Department
of Pharmacy and CIRPeB, Research Centre on Bioactive Peptides “Carlo
Pedone”, University of Naples “Federico
II”, Via Montesano 49, Naples 80131, Italy
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20
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Yu Z, Li N, Liu Y, Zhang B, Zhang M, Wang X, Wang X. Formation, structure and functional characteristics of amyloid fibrils formed based on soy protein isolates. Int J Biol Macromol 2024; 254:127956. [PMID: 37951451 DOI: 10.1016/j.ijbiomac.2023.127956] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/26/2023] [Accepted: 11/06/2023] [Indexed: 11/14/2023]
Abstract
Food protein-derived amyloid fibrils possess great untapped potential applications in food and other biomaterials. The objective of this report was to investigate the formation mechanism, structure and functional characterization of soy protein amyloid fibrils (SPF) through hydrolysis and heating (pH 2.0, 85 °C, 0-24 h) of soy protein isolate (SPI). Fibrillation growth analysis indicated polypeptide hydrolysis upon hydrolytic heating, and the amyloid fibrils were basically formed 8 h later. The microstructure of SPF was monitored by transmission electron microscopy and scanning electron microscopy, exhibiting change from an irregular spherical structure to a coiled, intertwined thread-like polymer. The secondary structures of SPI all changed drastically during the fibrillation process was characterized by Fourier transform infrared spectroscopy, which the α-helical and β-turned content decreasing by 12.67 % and 5.07 %, respectively, and the content of ordered β-folded structures increasing with heating time, finally increasing to 53.61 % at 24 h. The fluorescence intensity of the endogenous fluorescence spectra decreased and the maximum emission wavelength was red-shifted, suggesting that the fibrillation unfolded the protein structure, hydrolyzed and self-assembled into amyloid fibrils aggregates obscuring the aromatic amino acid residues. The emulsification activity, emulsion stability and viscosity of SPF improved with the increase in protein fibrillation.
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Affiliation(s)
- Zhichao Yu
- College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Ning Li
- College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Yian Liu
- College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Boya Zhang
- College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Mengyue Zhang
- College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Xibo Wang
- College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China.
| | - Xu Wang
- College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China.
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21
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Zou Z, Wei J, Chen Y, Kang Y, Shi H, Yang F, Shi Z, Chen S, Zhou Y, Sepich-Poore C, Zhuang X, Zhou X, Jiang H, Wen Z, Jin P, Luo C, He C. FMRP phosphorylation modulates neuronal translation through YTHDF1. Mol Cell 2023; 83:4304-4317.e8. [PMID: 37949069 PMCID: PMC10872974 DOI: 10.1016/j.molcel.2023.10.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 09/12/2023] [Accepted: 10/19/2023] [Indexed: 11/12/2023]
Abstract
RNA-binding proteins (RBPs) control messenger RNA fate in neurons. Here, we report a mechanism that the stimuli-induced neuronal translation is mediated by phosphorylation of a YTHDF1-binding protein FMRP. Mechanistically, YTHDF1 can condense with ribosomal proteins to promote the translation of its mRNA targets. FMRP regulates this process by sequestering YTHDF1 away from the ribosome; upon neuronal stimulation, FMRP becomes phosphorylated and releases YTHDF1 for translation upregulation. We show that a new small molecule inhibitor of YTHDF1 can reverse fragile X syndrome (FXS) developmental defects associated with FMRP deficiency in an organoid model. Our study thus reveals that FMRP and its phosphorylation are important regulators of activity-dependent translation during neuronal development and stimulation and identifies YTHDF1 as a potential therapeutic target for FXS in which developmental defects caused by FMRP depletion could be reversed through YTHDF1 inhibition.
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Affiliation(s)
- Zhongyu Zou
- Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA; Howard Hughes Medical Institute, The University of Chicago, Chicago, IL 60637, USA
| | - Jiangbo Wei
- Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA; Howard Hughes Medical Institute, The University of Chicago, Chicago, IL 60637, USA
| | - Yantao Chen
- The Center for Chemical Biology, Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yunhee Kang
- Department of Psychiatry and Behavioral Sciences, Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Hailing Shi
- Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA; Howard Hughes Medical Institute, The University of Chicago, Chicago, IL 60637, USA
| | - Fan Yang
- Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA; Howard Hughes Medical Institute, The University of Chicago, Chicago, IL 60637, USA
| | - Zhuoyue Shi
- Department of Human Genetics, The University of Chicago, Chicago, IL 60637, USA
| | - Shijie Chen
- The Center for Chemical Biology, Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China
| | - Ying Zhou
- Department of Psychiatry and Behavioral Sciences, Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Caraline Sepich-Poore
- Howard Hughes Medical Institute, The University of Chicago, Chicago, IL 60637, USA; Medical Scientist Training Program, Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL 60637, USA
| | - Xiaoxi Zhuang
- Department of Neurobiology, The University of Chicago, Chicago, IL 60637, USA
| | - Xiaoming Zhou
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Hualiang Jiang
- The Center for Chemical Biology, Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Zhexing Wen
- Department of Psychiatry and Behavioral Sciences, Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Peng Jin
- Department of Psychiatry and Behavioral Sciences, Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, USA.
| | - Cheng Luo
- The Center for Chemical Biology, Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China; School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China.
| | - Chuan He
- Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA; Howard Hughes Medical Institute, The University of Chicago, Chicago, IL 60637, USA.
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22
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Sanchis I, Spinelli R, Siano A. Acetylcholine hydrolytic activity of fibrillated β-amyloid (1-40) peptide. Amino Acids 2023; 55:1991-1997. [PMID: 37904049 DOI: 10.1007/s00726-023-03349-3] [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: 06/27/2023] [Accepted: 10/10/2023] [Indexed: 11/01/2023]
Abstract
Alzheimer's disease is characterized by the presence of senile plaques composed of β-amyloid peptide (Aβ) aggregates with toxic effects that are still not fully understood. Recently, it was discovered that Aβ(1-42) fibrils possess catalytic activity on acetylcholine hydrolysis. Catalytic amyloids are an emerging and exciting field of research. In this study, we examined the catalytic activity of the fibrils formed by Aβ(1-40), the most abundant Aβ variant, on acetylcholine hydrolysis. Our findings reveal that Aβ(1-40) fibrils exhibit moderate enzymatic activity, indicating that natural peptide aggregates could serve as biocatalysts and provide new insights into the potential role of Aβ in neurological disorders.
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Affiliation(s)
- Ivan Sanchis
- Laboratory of Bioactive Peptides, Department of Organic Chemistry, Faculty of Biochemistry and Biological Sciences, National University of the Littoral, Ciudad Universitaria UNL, 3000, Santa Fe, Argentina
- Ministry of Science, Technology and Innovation, National Scientific and Technical Research Council (CONICET), Godoy Cruz, 2290, Ciudad de Buenos Aires, Argentina
| | - Roque Spinelli
- Laboratory of Bioactive Peptides, Department of Organic Chemistry, Faculty of Biochemistry and Biological Sciences, National University of the Littoral, Ciudad Universitaria UNL, 3000, Santa Fe, Argentina
- Ministry of Science, Technology and Innovation, National Scientific and Technical Research Council (CONICET), Godoy Cruz, 2290, Ciudad de Buenos Aires, Argentina
| | - Alvaro Siano
- Laboratory of Bioactive Peptides, Department of Organic Chemistry, Faculty of Biochemistry and Biological Sciences, National University of the Littoral, Ciudad Universitaria UNL, 3000, Santa Fe, Argentina.
- Ministry of Science, Technology and Innovation, National Scientific and Technical Research Council (CONICET), Godoy Cruz, 2290, Ciudad de Buenos Aires, Argentina.
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23
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Singh A, Rakshit D, Kumar A, Mishra A, Shukla R. Vitamin E modified polyamidoamine dendrimer for piperine delivery to alleviate Aβ 1-42 induced neurotoxicity in Balb/c mice model. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2023; 34:2232-2254. [PMID: 37379243 DOI: 10.1080/09205063.2023.2230857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/30/2023]
Abstract
In Alzheimer's disease (AD), amyloid beta (Aβ1-42) aggregate formation and neurofibrillary tangles are major pathological hallmarks which are related to neurodegeneration in the brain. To alleviate Aβ1-42 fibrils toxicity vitamin E derivative tocopheryl polyethylene glycol succinate (TPGS) was conjugated with polyamidoamine (PAMAM) dendrimer through carbodiimide reaction to synthesize TPGS-PAMAM. This TPGS-PAMAM was employed to entrap neuroprotective agent piperine (PIP) through an anti-solvent technique to prepare PIP-TPGS-PAMAM. The dendrimer conjugate was prepared to reduce Aβ1-42 induced neurotoxicity and increase acetylcholine levels in AD mice models. The synthesis of dendrimer conjugate was characterized through proton nuclear magnetic resonance (NMR) and Trinitrobenzene sulphonic acid assay (TNBS). Physical characterization of dendrimers conjugates were done through various spectroscopic, thermal and microscopy based techniques. PIP-TPGS-PAMAM showed 43.25 nm particle size with PIP percentage encapsulation efficiency of 80.35%. Further Aβ1-42 fibril disaggregation effect of nanocarrier was evaluated using Thioflavin-T (ThT) assay and circular dichroism (CD). The neuroprotection studies for PIP-TPGS-PAMAM was evaluated against neurotoxicity induced using Aβ1-42 intracerebroventricular (ICV) injected in Balb/c mice. The group of mice administered with PIP-TPGS-PAMAM exhibited an increase in the proportion of random alternations in T-maze test and novel object recognition test (NORT) exhibited an increase in working memory cognitive functions. The biochemical and histopathological analysis revealed PIP-TPGS-PAMAM treated groups enhanced acetylcholine levels, reduced ROS and Aβ1-42 content significantly. Our findings imply that PIP-TPGS-PAMAM enhanced memory and reduced cognitive deficit in mice brain induced by Aβ1-42 toxicity.
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Affiliation(s)
- Ajit Singh
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER)-Raebareli, Lucknow, India
| | - Debarati Rakshit
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, India
| | - Ankit Kumar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, India
| | - Awanish Mishra
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, India
| | - Rahul Shukla
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER)-Raebareli, Lucknow, India
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24
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Żyła A, Martel A, Jurczak P, Moliński A, Szymańska A, Kozak M. Human cystatin C induces the disaggregation process of selected amyloid beta peptides: a structural and kinetic view. Sci Rep 2023; 13:20833. [PMID: 38012338 PMCID: PMC10682421 DOI: 10.1038/s41598-023-47514-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 11/14/2023] [Indexed: 11/29/2023] Open
Abstract
Neurodegenerative diseases, such as Alzheimer's disease (AD) and various types of amyloidosis, are incurable; therefore, understanding the mechanisms of amyloid decomposition is crucial to develop an effective drug against them for future therapies. It has been reported that one out of three people over the age of 85 are suffering from dementia as a comorbidity to AD. Amyloid beta (Aβ), the hallmark of AD, transforms structurally from monomers into β-stranded aggregates (fibrils) via multiple oligomeric states. Astrocytes in the central nervous system secrete the human cystatin C protein (HCC) in response to various proteases and cytokines. The codeposition of Aβ and HCC in the brains of patients with AD led to the hypothesis that cystatin C is implicated in the disease process. In this study, we investigate the intermolecular interactions between different atomic structures of fibrils formed by Aβ peptides and HCC to understand the pathological aggregation of these polypeptides into neurotoxic oligomers and then amyloid plaques. To characterize the interactions between Aβ and HCC, we used a complementary approach based on the combination of small-angle neutron scattering analysis, atomic force microscopy and computational modelling, allowing the exploration of the structures of multicomponent protein complexes. We report here an optimized protocol to study that interaction. The results show a dependency of the sequence length of the Aβ peptide on the ability of the associated HCC to disaggregate it.
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Affiliation(s)
- Adriana Żyła
- Department of Biomedical Physics, Faculty of Physics, Adam Mickiewicz University, Poznań, Poland
- NanoBioMedical Centre, Adam Mickiewicz University, Poznań, Poland
| | - Anne Martel
- Large Scale Structures, ILL Neutrons for Society, Institute Laue-Langevin, Grenoble, France
| | - Przemysław Jurczak
- Laboratory of Medical Chemistry, Department of Biomedical Chemistry, Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
| | - Augustyn Moliński
- Department of Biomedical Physics, Faculty of Physics, Adam Mickiewicz University, Poznań, Poland
- NanoBioMedical Centre, Adam Mickiewicz University, Poznań, Poland
| | - Aneta Szymańska
- Laboratory of Medical Chemistry, Department of Biomedical Chemistry, Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
| | - Maciej Kozak
- Department of Biomedical Physics, Faculty of Physics, Adam Mickiewicz University, Poznań, Poland.
- SOLARIS National Synchrotron Radiation Centre, Jagiellonian University, Kraków, Poland.
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25
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Siposova K, Huntosova V, Sedlakova D, Macajova M, Bilcik B, Nair AV, Nair S, Hovhannisyan V, Chen SJ, Musatov A. Biocompatible zeolite-dye composites with anti-amyloidogenic properties. Int J Biol Macromol 2023; 251:126331. [PMID: 37579899 DOI: 10.1016/j.ijbiomac.2023.126331] [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: 03/23/2023] [Revised: 08/07/2023] [Accepted: 08/11/2023] [Indexed: 08/16/2023]
Abstract
One of the most attractive approaches in biomedicine and pharmacy is the application of multifunctional materials. The mesoporous structure of clinoptilolite (CZ) absorbs various types of substances and can be used as a model for studying the carriers for targeted drug delivery with controlled release. CZ-dye composites are fabricated by incorporation into clinoptilolite pores commonly used dyes, aluminum phthalocyanine, zinc porphine, and hypericin. We examined and compared the effect of pure dyes and CZ-dye composites on insulin amyloidogenesis. The formation of insulin amyloid fibrils and the disassembly of preformed fibrils is significantly affected by any of the three compounds, however, the strongest effect is observed for aluminum phthalocyanine indicating a structurally-dependent anti-amyloidogenic activity of the dyes. The incorporation of dyes into CZ particles resulted in enhanced anti-amyloidogenic activity in comparison to pure CZ particles. The cell metabolic activity, biocompatibility and fluorescence biodistribution of the dyes entrapped in the composites were tested in vitro (U87 MG cells) and in vivo in the quail chorioallantoic membrane model. Considering the photoactive properties of the dyes used, we assume their applicability in photodiagnostics and photodynamic therapy. It can also be expected that their anti-amyloidogenic potential can be enhanced by photodynamic effect.
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Affiliation(s)
- Katarina Siposova
- Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001, Kosice, Slovakia; College of Photonics, National Yang Ming Chiao Tung University, Tainan 711, Taiwan.
| | - Veronika Huntosova
- Center for Interdisciplinary Biosciences, Technology, and Innovation Park, P.J. Safarik University in Kosice, Jesenna 5, 041 54, Kosice, Slovakia.
| | - Dagmar Sedlakova
- Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001, Kosice, Slovakia.
| | - Mariana Macajova
- Institute of Animal Biochemistry and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dubravska cesta 9, 840 05 Bratislava, Slovakia.
| | - Boris Bilcik
- Institute of Animal Biochemistry and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dubravska cesta 9, 840 05 Bratislava, Slovakia.
| | | | - Sumesh Nair
- College of Photonics, National Yang Ming Chiao Tung University, Tainan 711, Taiwan
| | | | - Shean-Jen Chen
- College of Photonics, National Yang Ming Chiao Tung University, Tainan 711, Taiwan.
| | - Andrey Musatov
- Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001, Kosice, Slovakia.
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26
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Xu SQ, Sie ZY, Hsu JI, Tan KT. Small Plasma Membrane-Targeted Fluorescent Dye for Long-Time Imaging and Protein Degradation Analyses. Anal Chem 2023; 95:15549-15555. [PMID: 37816133 DOI: 10.1021/acs.analchem.3c01980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/12/2023]
Abstract
Plasma membrane (PM)-targeted fluorescent dyes have become an important tool to visualize morphological and dynamic changes in the cell membrane. However, most of these PM dyes are either too large and thus might potentially perturb the membrane and affect its functions or exhibit a short retention time on the cell membrane. The rapid internalization problem is particularly severe for PM dyes based on cationic and neutral hydrophobic fluorescent dyes, which can be easily transported into the cells by transmembrane potential and passive diffusion mechanisms. In this paper, we report a small but highly specific PM fluorescent dye, PM-1, which exhibits a very long retention time on the plasma membrane with a half-life of approximately 15 h. For biological applications, we demonstrated that PM-1 can be used in combination with protein labeling probes to study ectodomain shedding and endocytosis processes of cell surface proteins and successfully demonstrated that native transmembrane human carbonic anhydrase IX (hCAIX) is degraded via the ectodomain shedding mechanism. In contrast, hCAIX undergoes endocytic degradation in the presence of sheddase inhibitors. We believe that PM-1 can be a versatile tool to provide detailed insights into the dynamic processes of the cell surface proteins.
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Affiliation(s)
- Shun-Qiang Xu
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu 30013, Taiwan, Republic of China
| | - Zong-Yan Sie
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu 30013, Taiwan, Republic of China
| | - Jung-I Hsu
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu 30013, Taiwan, Republic of China
| | - Kui-Thong Tan
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu 30013, Taiwan, Republic of China
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China
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27
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Taniwa K, Murakami K, Sakaguchi Y, Izuo N, Hanaki M, Sampa N, Kume T, Shimizu T, Irie K. Detection of Dietary Chalcone and Flavonoid Metabolites in Mice Using UPLC-MS/MS and Their Modulatory Effects on Amyloid β Aggregation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:14289-14299. [PMID: 37702279 DOI: 10.1021/acs.jafc.3c02598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
Amyloid β-protein (Aβ42) aggregates have been demonstrated to induce cognitive decline and neurodegeneration in Alzheimer's disease (AD). Thus, functional food ingredients that inhibit Aβ42 aggregation are valuable for AD prevention. Although several food ingredients have been studied for their anti-aggregation activity, information on their bioavailability in the brain, incorporated forms, and relevance to AD etiology is limited. Here, we first detected the sulfate- and glucuronic-acid-conjugated forms of green perilla-derived chalcone (1) and taxifolin (2), which inhibit Aβ42 aggregation, in the brain, small intestine, and plasma of mice (1 and 2 were administered orally) using ultra-performance liquid chromatography-tandem mass spectrometry. We observed that the conjugated metabolites (sulfate (4) and glucuronide (5)) of 1 prevented the fibrillization and oligomerization of Aβ42. These findings imply that the conjugated metabolites of 1 can prove beneficial for AD treatment.
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Affiliation(s)
- Kota Taniwa
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Kazuma Murakami
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Yoshiki Sakaguchi
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Naotaka Izuo
- Department of Endocrinology, Hematology and Gerontology, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
| | - Mizuho Hanaki
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Nobuaki Sampa
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
| | - Toshiaki Kume
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
| | - Takahiko Shimizu
- Department of Endocrinology, Hematology and Gerontology, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
| | - Kazuhiro Irie
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
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28
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Leimu L, Haavisto O, Nesati V, Holm P, Haapalinna A, Salbo R, Pesonen U. Development of an in vitro aggregation assay for long synthetic polypeptide, amyloidogenic gelsolin fragment AGelD187N 173-242. PLoS One 2023; 18:e0290179. [PMID: 37590229 PMCID: PMC10434866 DOI: 10.1371/journal.pone.0290179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 08/02/2023] [Indexed: 08/19/2023] Open
Abstract
Aggregation of the gelsolin protein fragment is the hallmark of the hereditary systemic disease gelsolin amyloidosis. As with other protein misfolding diseases, there is an urgent need for efficient disease-modifying treatment for gelsolin amyloidosis. The formation of amyloids can be reproduced by incubating the disease-causing amyloidogenic 8 kDa polypeptide, 70-residue gelsolin protein fragment, AGelD187N 173-242, in vitro and monitoring the process by thioflavin T dye. However, for screening of potential aggregation inhibitors, the required protein amounts are large and the biotechnological production of amyloidogenic proteins has many challenges. Conversely, use of shorter synthetic regions of AGelD187N 173-242 does not mimic the in vivo aggregation kinetics of full-length fragment as they have different aggregation propensity. In this study, we present an in vitro aggregation assay for full-length AGelD187N 173-242 that has been produced by solid-phase chemical synthesis and after that monomerized carefully. Chemical synthesis allows us to produce high quantities of full-length fragment efficiently and at low cost. We demonstrate that the generated aggregates are fibrillar in nature and how the purity, terminal modification, initial aggregates and seeding affect the aggregation kinetics of a synthetic gelsolin fragment. We also present sufficient quality criteria for the initial monomerized synthetic polypeptide.
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Affiliation(s)
- Laura Leimu
- R&D, Orion Pharma, Orion Corporation, Turku, Finland
- Faculty of Medicine, Institute of Biomedicine, University of Turku, Turku, Finland
| | - Oskar Haavisto
- Faculty of Medicine, Institute of Biomedicine, University of Turku, Turku, Finland
| | - Victor Nesati
- R&D, Orion Pharma, Orion Corporation, Turku, Finland
| | - Patrik Holm
- R&D, Orion Pharma, Orion Corporation, Turku, Finland
| | | | - Rune Salbo
- R&D, Orion Pharma, Orion Corporation, Turku, Finland
| | - Ullamari Pesonen
- Faculty of Medicine, Institute of Biomedicine, University of Turku, Turku, Finland
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29
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Yoo J, Han J, Lim MH. Transition metal ions and neurotransmitters: coordination chemistry and implications for neurodegeneration. RSC Chem Biol 2023; 4:548-563. [PMID: 37547459 PMCID: PMC10398360 DOI: 10.1039/d3cb00052d] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 06/26/2023] [Indexed: 08/08/2023] Open
Abstract
Neurodegeneration is characterized by a disturbance in neurotransmitter-mediated signaling pathways. Recent studies have highlighted the significant role of transition metal ions, including Cu(i/ii), Zn(ii), and Fe(ii/iii), in neurotransmission, thereby making the coordination chemistry of neurotransmitters a growing field of interest in understanding signal dysfunction. This review outlines the physiological functions of transition metal ions and neurotransmitters, with the metal-binding properties of small molecule-based neurotransmitters and neuropeptides. Additionally, we discuss the structural and conformational changes of neurotransmitters induced by redox-active metal ions, such as Cu(i/ii) and Fe(ii/iii), and briefly describe the outcomes arising from their oxidation, polymerization, and aggregation. These observations have important implications for neurodegeneration and emphasize the need for further research to develop potential therapeutic strategies.
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Affiliation(s)
- Jeasang Yoo
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Jiyeon Han
- Department of Applied Chemistry, University of Seoul Seoul 02504 Republic of Korea
| | - Mi Hee Lim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
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30
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Chuang Y, Chang Y, Tu L. Investigating the inhibitory property of DM hCT on hCT fibrillization via its relevant peptide fragments. Protein Sci 2023; 32:e4711. [PMID: 37354016 PMCID: PMC10360389 DOI: 10.1002/pro.4711] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 06/17/2023] [Accepted: 06/21/2023] [Indexed: 06/25/2023]
Abstract
The irreversible aggregation of proteins or peptides greatly limits their bioavailability; therefore, effective inhibition using small molecules or biocompatible materials is very difficult. Human calcitonin (hCT), a hormone polypeptide with 32 residues, is secreted by the C-cells of the thyroid gland. The biological function of this hormone is to regulate calcium and phosphate concentrations in the blood via several different pathways. One of these is to inhibit the activity of osteoclasts; thus, calcitonin could be used to treat osteoporosis and Paget's disease of the bone. However, hCT is prone to aggregation in aqueous solution and forms amyloid fibrils. Salmon and eel calcitonin are currently used as clinical substitutes for hCT. In a previous study, we found that the replacement of two residues at positions 12 and 17 of hCT with amino acids that appear in the salmon sequence can greatly suppress peptide aggregation. The double mutations of hCT (DM hCT) also act as good inhibitors by disrupting wild-type hCT fibrillization, although the inhibition mechanism is not clear. More importantly, we demonstrated that DM hCT is biologically active in interacting with the calcitonin receptor. To further understand the inhibitory effect of DM hCT on hCT fibrillization, we created four relevant peptide fragments based on the DM hCT sequence. Our examination revealed that the formation of a helix of DM hCT was possibly a key component contributing to its inhibitory effect. This finding could help in the development of peptide-based inhibitors and in understanding the aggregation mechanism of hCT.
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Affiliation(s)
- Ya‐Ping Chuang
- Department of ChemistryNational Taiwan Normal UniversityTaipeiTaiwan
| | - Yu‐Pei Chang
- Department of ChemistryNational Taiwan Normal UniversityTaipeiTaiwan
| | - Ling‐Hsien Tu
- Department of ChemistryNational Taiwan Normal UniversityTaipeiTaiwan
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31
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Zhang Y, Brooks SC, Rosi NL. Molecular Modulator Approach for Controlling the Length of Chiral 1D Single-Helical Gold Nanoparticle Superstructures. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:5071-5078. [PMID: 37456597 PMCID: PMC10339826 DOI: 10.1021/acs.chemmater.3c00590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/02/2023] [Indexed: 07/18/2023]
Abstract
Peptide-based methods have proven useful for constructing helical gold nanoparticle superstructures that exhibit strong plasmonic chiroptical activity. Superstructure syntheses using the amphiphilic peptide conjugate C16-(AYSSGAPPMoxPPF)2 typically yield 1D helices with a broad length distribution. In this study, we introduce a molecular modulator approach for controlling helix length. It represents a first step toward achieving narrowly disperse populations of single helices fabricated using peptide-based methods. Varying amounts of modulator, C16-(AYSSGA)2, were added to C16-(AYSSGAPPMoxPPF)2-based single-helix syntheses, resulting in decreased helix length and narrowing of the helix length distribution. Kinetic studies of fiber assembly were performed to investigate the mechanism by which the modulator affects helix length. It was found that the modulator leads to rapid peptide conjugate nucleation and fiber growth, which in turn results in large amounts of short fibers that serve as the underlying scaffold for the single-helix superstructures. These results constitute important advances toward generating monodisperse samples of plasmonic helical colloids.
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Affiliation(s)
- Yuyu Zhang
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Sydney C. Brooks
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Nathaniel L. Rosi
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Chemical and Petroleum Engineering, University
of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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Bera A, Ghosh P, Ghosh S, Mukherjee A, De P. Antioxidant Polymers with Enhanced Neuroprotection Against Insulin Fibrillation. Macromol Biosci 2023; 23:e2300100. [PMID: 37092867 DOI: 10.1002/mabi.202300100] [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: 03/09/2023] [Revised: 04/10/2023] [Indexed: 04/25/2023]
Abstract
Lipoic acid (LA) and dihydrolipoic acid (DHLA) are well established antioxidants to scavenge reactive oxygen species (ROS). However, they are carboxylates with ≈4.7 pKa making them negatively charged at physiological pH (7.4) reducing their passive diffusion through cell membranes. LA is known to be capable of reducing protein fibrillation. Incorporation of LA and especially DHLA in polymer side chains are scarce. Herein, the first examples of the anti-amyloidogenic effect of LA and DHLA incorporated into the side-chain of a block copolymer with a water-soluble poly(polyethylene glycol methyl ether methacrylate) (PPEGMA) segment are presented. The resultant polymers show improved ROS scavenging activity and improved ability to reduce insulin fibrillation compared to free LA and DHLA. Furthermore, the resultant polymers are also capable of disintegrating preformed insulin firbrils. Interestingly, polymers with dihydro-lipoate moieties showed 93% free radical scavenging activity with 91% anti-fibrillating efficacies for insulin protein confirmed by 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay and Thioflavin T (ThT) dye binding study, respectively. Further, the antioxidant polymers increase the cell viability against fibrillar insulin aggregates that may be involved in the etiology of several diseases. Overall, this work reveals that antioxidant polymer-based therapeutic agents can serve as a powerful modulation strategy for developing novel drugs in future against amyloid-related disorders.
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Affiliation(s)
- Avisek Bera
- Polymer Research Centre, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal, 741246, India
- Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal, 741246, India
| | - Pooja Ghosh
- Polymer Research Centre, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal, 741246, India
- Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal, 741246, India
| | - Shilpendu Ghosh
- Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal, 741246, India
| | - Arindam Mukherjee
- Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal, 741246, India
| | - Priyadarsi De
- Polymer Research Centre, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal, 741246, India
- Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal, 741246, India
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Hill SE, Beaulieu-Abdelahad D, Lemus A, Webster JM, Ospina SR, Darling AL, Martin MD, Patel S, Bridenstine L, Swonger R, Paul S, Blackburn R, Calcul L, Dickey CA, Leahy JW, Blair LJ. Benzothiazole Substitution Analogs of Rhodacyanine Hsp70 Inhibitors Modulate Tau Accumulation. ACS Chem Biol 2023; 18:1124-1135. [PMID: 37144894 PMCID: PMC10443619 DOI: 10.1021/acschembio.2c00919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The accumulation and aggregation of the microtubule-associated protein tau (tau) into intracellular neuronal tangles are a hallmark of a range of progressive neurodegenerative tauopathies, including Alzheimer's disease (AD), frontotemporal dementia, Pick's disease, and progressive supranuclear palsy. The aberrant phosphorylation of tau is associated with tau aggregates in AD. Members of the heat shock protein 70 kDa (Hsp70) family of chaperones bind directly to tau and modulate tau clearance and aggregation. Small molecules that inhibit the Hsp70 family of chaperones have been shown to reduce the accumulation of tau, including phosphorylated tau. Here, eight analogs of the rhodacyanine inhibitor, JG-98, were synthesized and evaluated. Like JG-98, many of the compounds inhibited ATPase activity of the cytosolic heat shock cognate 70 protein (Hsc70) and reduced total, aggregated, and phosphorylated tau accumulation in cultured cells. Three compounds, representing divergent clogP values, were evaluated for in vivo blood-brain barrier penetration and tau reduction in an ex vivo brain slice model. AL69, the compound with the lowest clogP and the lowest membrane retention in a parallel artificial membrane permeability assay (PAMPA), reduced phosphorylated tau accumulation. Our results suggest that benzothiazole substitutions of JG-98 that increase hydrophilicity may increase the efficacy of these Hsp70 inhibitors to reduce phosphorylated tau.
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Affiliation(s)
- Shannon E. Hill
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33612, USA
| | - David Beaulieu-Abdelahad
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33612, USA
| | - Andrea Lemus
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, CHE 205, Tampa, Florida 33620, USA
| | - Jack M. Webster
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33612, USA
| | - Santiago Rodriguez Ospina
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33612, USA
| | - April L. Darling
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33612, USA
| | - Mackenzie D. Martin
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33612, USA
| | - Shreya Patel
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, CHE 205, Tampa, Florida 33620, USA
| | - Liznair Bridenstine
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, CHE 205, Tampa, Florida 33620, USA
| | - Ronald Swonger
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, CHE 205, Tampa, Florida 33620, USA
| | - Steven Paul
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33612, USA
| | - Roy Blackburn
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33612, USA
| | - Laurent Calcul
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, CHE 205, Tampa, Florida 33620, USA
| | - Chad A. Dickey
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33612, USA
- Research Service, James A Haley Veterans Hospital, 13000 Bruce B Downs Blvd, Tampa, FL 33612, USA
| | - James W. Leahy
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, CHE 205, Tampa, Florida 33620, USA
- Center for Drug Discovery and Innovation, University of South Florida, 3720 Spectrum Boulevard, Suite 303, Tampa, Florida 33612, USA
| | - Laura J. Blair
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33612, USA
- Research Service, James A Haley Veterans Hospital, 13000 Bruce B Downs Blvd, Tampa, FL 33612, USA
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Mandal S, Jana D, Dolai J, Sarkar AK, Ghorai BK, Jana NR. Biodegradable Poly(trehalose) Nanoparticle for Preventing Amyloid Beta Aggregation and Related Neurotoxicity. ACS APPLIED BIO MATERIALS 2023. [PMID: 37167565 DOI: 10.1021/acsabm.2c00771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Trehalose is a disaccharide that is capable of inhibiting protein aggregation and activating cellular autophagy. It has been shown that a polymer or nanoparticle form, terminated with multiple trehalose units, can significantly enhance the anti-amyloidogenic performance and is suitable for the treatment of neurodegenerative diseases. Here, we report a trehalose-conjugated polycarbonate-co-lactide polymer and formulation of its nanoparticles having multiple numbers of trehalose exposed on the surface. The resultant poly(trehalose) nanoparticle inhibits the aggregation of amyloid beta peptides and disintegrates matured amyloid fibrils into smaller fragments. Moreover, the poly(trehalose) nanoparticle lowers extracellular amyloid β oligomer-driven cellular stress and enhances cell viability. The presence of biodegradable polycarbonate components in the poly(trehalose) nanoparticle would enhance their application potential as an anti-amyloidogenic material.
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Affiliation(s)
- Suman Mandal
- School of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | - Debabrata Jana
- Department of Chemistry, Ramakrishna Mission Vivekananda Centenary College, Rahara, West Bengal 700118, India
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India
| | - Jayanta Dolai
- School of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Ankan Kumar Sarkar
- School of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Binay K Ghorai
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India
| | - Nikhil R Jana
- School of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India
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35
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Majid N, Siddiqi MK, Hassan MN, Malik S, Khan S, Khan RH. Inhibition of primary and secondary nucleation alongwith disruption of amyloid fibrils and alleviation of associated cytotoxicity: A biophysical insight of a novel property of Chlorpropamide (an anti-diabetic drug). BIOMATERIALS ADVANCES 2023; 151:213450. [PMID: 37148596 DOI: 10.1016/j.bioadv.2023.213450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 03/24/2023] [Accepted: 04/25/2023] [Indexed: 05/08/2023]
Abstract
Aggregation of physiologically synthesized soluble proteins to insoluble, cytotoxic fibrils is a pre-requisite for pathogenesis of amyloid associated disorders including Alzheimer's disease, non-systemic amyloidosis, Parkinson's disease, etc. Considerable advancement has been made to understand the mechanism behind aggregation process but till date we have no efficient cure and preventive therapy for associated diseases. Strategies to prevent protein aggregation are nevertheless many which have been proved promisingly successful in vitro. One of those is repurposing already approved drugs that saves time and money too and has been employed in this study. Here, for the first time we are reporting the effectiveness of an anti-diabetic drug chlorpropamide (CHL) under dosage conditions, a novel property to inhibit aggregation in human lysozyme (HL) in vitro. Spectroscopic (Turbidity, RLS, ThT, DLS, ANS) and microscopic (CLSM) results demonstrates that CHL has the potency to suppress aggregation in HL up to 70 %. CHL is shown to affect the elongation of fibrils with IC50 value of 88.5 μM as clear from the kinetics results, may be by interacting near/with aggregation prone regions of HL. Hemolytic assay also revealed the reduced cytotoxicity in the presence of CHL. Disruption of amyloid fibrils and inhibition of secondary nucleation in the presence of CHL was also evidenced by ThT, CD and CLSM results with reduced cytotoxicity as confirmed by hemolytic assay. We also performed preliminary studies on α-synuclein fibrillation inhibition and surprisingly found that CHL is not just inhibiting the fibrillation but also stabilizing the protein in its native state. These findings insinuate that CHL (anti-diabetic) possess multiple roles and can be a promising drug for developing therapeutic against non-systemic amyloidosis, Parkinson's disease and other amyloid associated disorders.
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Affiliation(s)
- Nabeela Majid
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Mohammad Khursheed Siddiqi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India; Department of Pathology, Case Western Reserve University, Cleveland, OH, United States of America
| | - Md Nadir Hassan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Sadia Malik
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Seema Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India.
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Iwai A, Nakamura R, Tomizawa I, Mitsunuma H, Hori Y, Tomita T, Sohma Y, Kanai M. Attenuation of α-synuclein aggregation by catalytic photo-oxygenation. Chem Commun (Camb) 2023; 59:5745-5748. [PMID: 37092686 DOI: 10.1039/d3cc00665d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
We developed catalyst 11 to promote selective photo-oxygenation of α-synuclein amyloid and attenuate its aggregation. Catalyst 11 effectively oxygenated both small and large aggregates. The oxygenated α-synuclein exhibited lower seeding activity than intact α-synuclein. This study corroborates the feasibility of catalytic photo-oxygenation as an anti-synucleinopathy strategy.
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Affiliation(s)
- Atsushi Iwai
- Laboratory of Synthetic Organic Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Reito Nakamura
- Laboratory of Neuropathology and Neuroscience, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ikumi Tomizawa
- Laboratory of Neuropathology and Neuroscience, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Harunobu Mitsunuma
- Laboratory of Synthetic Organic Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Yukiko Hori
- Laboratory of Neuropathology and Neuroscience, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Taisuke Tomita
- Laboratory of Neuropathology and Neuroscience, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Youhei Sohma
- School of Pharmaceutical Sciences, Wakayama Medical University, 25-1 Shichiban-cho, Wakayama 640-8156, Japan.
| | - Motomu Kanai
- Laboratory of Synthetic Organic Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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37
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Sakalauskas A, Ziaunys M, Snieckute R, Janoniene A, Veiveris D, Zvirblis M, Dudutiene V, Smirnovas V. The Major Components of Cerebrospinal Fluid Dictate the Characteristics of Inhibitors against Amyloid-Beta Aggregation. Int J Mol Sci 2023; 24:ijms24065991. [PMID: 36983069 PMCID: PMC10059578 DOI: 10.3390/ijms24065991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 03/30/2023] Open
Abstract
The main pathological hallmark of Alzheimer's disease (AD) is the aggregation of amyloid-β into amyloid fibrils, leading to a neurodegeneration cascade. The current medications are far from sufficient to prevent the onset of the disease, hence requiring more research to find new alternative drugs for curing AD. In vitro inhibition experiments are one of the primary tools in testing whether a molecule may be potent to impede the aggregation of amyloid-beta peptide (Aβ42). However, kinetic experiments in vitro do not match the mechanism found when aggregating Aβ42 in cerebrospinal fluid. The different aggregation mechanisms and the composition of the reaction mixtures may also impact the characteristics of the inhibitor molecules. For this reason, altering the reaction mixture to resemble components found in cerebrospinal fluid (CSF) is critical to partially compensate for the mismatch between the inhibition experiments in vivo and in vitro. In this study, we used an artificial cerebrospinal fluid that contained the major components found in CSF and performed Aβ42 aggregation inhibition studies using oxidized epigallocatechin-3-gallate (EGCG) and fluorinated benzenesulfonamide VR16-09. This led to a discovery of a complete turnaround of their inhibitory characteristics, rendering EGCG ineffective while significantly improving the efficacy of VR16-09. HSA was the main contributor in the mixture that significantly increased the anti-amyloid characteristics of VR16-09.
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Affiliation(s)
- Andrius Sakalauskas
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Mantas Ziaunys
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Ruta Snieckute
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Agne Janoniene
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Dominykas Veiveris
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Mantas Zvirblis
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Virginija Dudutiene
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania
| | - Vytautas Smirnovas
- Institute of Biotechnology, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania
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Malik S, Siddiqi MK, Naseem N, Nabi F, Masroor A, Majid N, Hashmi A, Khan RH. Biophysical insight into the anti-fibrillation potential of Glyburide for its possible implication in therapeutic intervention of amyloid associated diseases. Biochimie 2023; 211:110-121. [PMID: 36958592 DOI: 10.1016/j.biochi.2023.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 02/27/2023] [Accepted: 03/15/2023] [Indexed: 03/25/2023]
Abstract
Protein aggregation is an underlying cause of many neurodegenerative diseases. Also, the overlapping pathological disturbances between neurodegenerative diseases and type-2 diabetes mellitus have urged the scientific community to explore potential of already available anti-diabetic medications in impeding amyloid formation too. Recent study brief out promising potential of an anti-diabetic drug Glyburide(GLY) as an inhibitor of amyloid fibrillation utilizing several biophysical techniques, computational methods and imaging tools. The mechanism of interaction was elucidated and the structural alterations in human serum albumin(HSA) as well as the microenvironment changes of its fluorophores(tryptophan, tyrosine) upon interacting with GLY were studied by spectroscopic techniques like Circular dichroism and synchronous fluorescence. Binding studies detailing about the GLY-HSA complex distance and the energy transfer efficiency was obtained by Fluorescence resonance energy transfer. For aggregation inhibition studies, the existence and size of aggregates formed in HSA and their inhibition by GLY was determined by Turbidity assay, Dynamic light scattering and Rayleigh light scattering along with dye binding assays. The ThT kinetics measurements analysis suggested that GLY deaccelerates fibrillation by decrement of apparent rate(Kapp) constant. The inhibitory effect of GLY might be attributed to native structure stabilization of HSA by obstruction into β-sheet conversion as confirmed by CD spectroscopy results. Amyloid inhibition and suppression of amyloid-induced hemolysis by GLY was further delineated by TEM and SEM analysis respectively. All these findings for the first time report the new facet of the anti-amyloidogenic potential of GLY, making it a promising candidate to treat neurodegenerative diseases too in the near future.
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Affiliation(s)
- Sadia Malik
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | | | - Nida Naseem
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Faisal Nabi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Aiman Masroor
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Nabeela Majid
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Amiruddin Hashmi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India.
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Homotaurine and Curcumin Analogues as Potential Anti-Amyloidogenic Agents. CHEMISTRY 2023. [DOI: 10.3390/chemistry5010018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023] Open
Abstract
Currently, there is neither a cure for Alzheimer’s disease (AD) nor a way to stop the progressive death of neuronal cells associated with this devastating aliment. To date, there are only medications that temporarily slow its progression, and do not interfere with its pathogenesis. One of the hallmarks of AD is the presence of amyloid-beta plaques derived from the metabolism of the amyloid precursor protein, via the cleavage by beta followed by gamma secretase. Homotaurine, a naturally occurring small molecule found in some seaweeds, and curcumin, a phenolic antioxidant found in Curcuma longa, have been extensively studied as potential compounds to prevent/reverse plaque formation. In this study, libraries of chalcones and extended chalcones based on curcumin, as well as aminopropylsulfonamides inspired by homotaurine, were synthesized. Using fluorescence spectroscopic analysis with Thioflavin T, the anti-aggregation effect on Aβ42 was determined. A select number of newly synthesized chalcones and extended chalcone analogs were revealed to be potential anti-amyloidogenic agents. These were further evaluated with regard to their neurotoxicity/neuroprotection. The extended chalcone analogs that displayed the most anti-aggregation effect on Aβ42 were further analyzed in an MTT assay. Although none of the compounds alone displayed any neurotoxicity, none were able to provide neuroprotection against Aβ42.
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40
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Housmans JAJ, Wu G, Schymkowitz J, Rousseau F. A guide to studying protein aggregation. FEBS J 2023; 290:554-583. [PMID: 34862849 DOI: 10.1111/febs.16312] [Citation(s) in RCA: 53] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/18/2021] [Accepted: 12/03/2021] [Indexed: 02/04/2023]
Abstract
Disrupted protein folding or decreased protein stability can lead to the accumulation of (partially) un- or misfolded proteins, which ultimately cause the formation of protein aggregates. Much of the interest in protein aggregation is associated with its involvement in a wide range of human diseases and the challenges it poses for large-scale biopharmaceutical manufacturing and formulation of therapeutic proteins and peptides. On the other hand, protein aggregates can also be functional, as observed in nature, which triggered its use in the development of biomaterials or therapeutics as well as for the improvement of food characteristics. Thus, unmasking the various steps involved in protein aggregation is critical to obtain a better understanding of the underlying mechanism of amyloid formation. This knowledge will allow a more tailored development of diagnostic methods and treatments for amyloid-associated diseases, as well as applications in the fields of new (bio)materials, food technology and therapeutics. However, the complex and dynamic nature of the aggregation process makes the study of protein aggregation challenging. To provide guidance on how to analyse protein aggregation, in this review we summarize the most commonly investigated aspects of protein aggregation with some popular corresponding methods.
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Affiliation(s)
- Joëlle A J Housmans
- Switch Laboratory, VIB Center for Brain and Disease Research, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Guiqin Wu
- Switch Laboratory, VIB Center for Brain and Disease Research, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Joost Schymkowitz
- Switch Laboratory, VIB Center for Brain and Disease Research, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Frederic Rousseau
- Switch Laboratory, VIB Center for Brain and Disease Research, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
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Mahboob A, Senevirathne DKL, Paul P, Nabi F, Khan RH, Chaari A. An investigation into the potential action of polyphenols against human Islet Amyloid Polypeptide aggregation in type 2 diabetes. Int J Biol Macromol 2023; 225:318-350. [PMID: 36400215 DOI: 10.1016/j.ijbiomac.2022.11.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/24/2022] [Accepted: 11/04/2022] [Indexed: 11/17/2022]
Abstract
Type 2 diabetes (T2D), a chronic metabolic disease characterized by hyperglycemia, results in significant disease burden and financial costs globally. Whilst the majority of T2D cases seem to have a genetic basis, non-genetic modifiable and non-modifiable risk factors for T2D include obesity, diet, physical activity and lifestyle, smoking, age, ethnicity, and mental stress. In healthy individuals, insulin secretion from pancreatic islet β-cells is responsible for keeping blood glucose levels within normal ranges. T2D patients suffer from multifactorial onset of β-cell dysfunction and/or loss of β-cell mass owing to reactive oxygen species (ROS) production, mitochondrial dysfunction, autophagy, and endoplasmic reticulum (ER) stress. Most predominantly however, and the focus of this review, it is the aggregation and misfolding of human Islet Amyloid Polypeptide (hIAPP, also known as amylin), which is detrimental to β-cell function and health. Whilst hIAPP is found in healthy individuals, its misfolded version is cytotoxic and able to induce β-cell dysfunction and/or death through various mechanisms including membrane changes in β-cell causing influx of calcium ions, arresting complete granule membrane recovery and ER stress. There are several existing therapeutics for T2D. However, there is a need for alternative or adjunct therapies for T2D with milder adverse effects and greater availability. Foremost among the potential natural therapeutics are polyphenols. Extensive data from studies evaluating the potential of polyphenols to inhibit hIAPP aggregation and disassemble aggregated hIAPP are promising. Moreover, in-vivo, and in-silico studies also highlight the potential effects of polyphenols against hIAPP aggregation and mitigation of larger pathological effects of T2D. Whilst there have been some promising clinical studies on the therapeutic potential of polyphenols, extensive further clinical studies and in-vitro studies evaluating the mechanisms of action and ideal doses for many of these compounds are required. The need for these studies is made more important by the postulated link between Alzheimer's disease (AD) and T2D pathophysiology given the similar aggregation process of their respective amyloid proteins, which evokes thoughts of cross-reactive polyphenols which can be effective for both AD and T2D patients.
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Affiliation(s)
- Anns Mahboob
- Premedical Division Weill Cornell Medicine Qatar, Qatar Foundation, Education City, P.O. Box 24144, Doha, Qatar
| | | | - Pradipta Paul
- Weill Cornell Medicine Qatar, Qatar Foundation, Education City, P.O. Box 24144, Doha, Qatar
| | - Faisal Nabi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202001, India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202001, India
| | - Ali Chaari
- Premedical Division Weill Cornell Medicine Qatar, Qatar Foundation, Education City, P.O. Box 24144, Doha, Qatar.
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Liu H, Wang J, Liu M, Zhang X, Liang Y, Wang J. Effect of Thermal Treatment on the Self-Assembly of Wheat Gluten Polypeptide. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020834. [PMID: 36677896 PMCID: PMC9862778 DOI: 10.3390/molecules28020834] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/30/2022] [Accepted: 01/12/2023] [Indexed: 01/17/2023]
Abstract
Self-assembled fibrillation of wheat gluten is a common phenomenon in the daily production and processing of wheat flour products. The driving forces for its formation and the factors that influence the morphology of fibrils have not been thoroughly investigated. In this study, the effect of three bonding changes (breaking hydrogen bonds, strengthening hydrophobic interactions, and SH-SS exchange reactions) on gluten polypeptide (GP) fibrillation was simulated by adjusting the heating temperature (room temperature (RT), 45 °C, 65 °C, and 95 °C). The results showed that the breakage of hydrogen bonds could induce conformational transitions in GPs and help to excite fibrillation in GPs. Strengthened hydrophobic interactions significantly contributed to the fibrillation of GPs. Covalent crosslinks generated by SH-SS exchange reactions might also promote the fibrillation of GPs. GPs with different degrees of hydrolysis (4.0%, 6.0%, and 10.0%, represented by DH 4, DH 6, and DH 10, respectively) presented different extents of fibrillation, with DH 10 GPs having a higher propensity to fibrillation than DH 4 and DH 6 GPs. The results of Fourier's transform infrared spectroscopy indicated that hydrophobic interactions drive the transition from a random coil and α-helix to a β-sheet. In addition, hydrophobic interactions also drive the intermolecular polymerization of GPs, resulting in larger molecular weight aggregates. The morphology presented by transmission electron microscopy showed that the greater the DH, the stronger the tendency for the worm-like aggregation of GPs.
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Affiliation(s)
- Hao Liu
- College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Jingxuan Wang
- College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Mei Liu
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Xia Zhang
- College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Ying Liang
- College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
- Correspondence: (Y.L.); (J.W.); Tel./Fax: +86-0371-67756872 (Y.L.); +86-0371-67756512 (J.W.)
| | - Jinshui Wang
- College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
- Correspondence: (Y.L.); (J.W.); Tel./Fax: +86-0371-67756872 (Y.L.); +86-0371-67756512 (J.W.)
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Hewa Nadugala B, Hantink R, Nebl T, White J, Pagel CN, Ranadheera C, Logan A, Raynes JK. The role of glycosylation in amyloid fibril formation of bovine κ-casein. Curr Res Food Sci 2023; 6:100433. [PMID: 36660302 PMCID: PMC9842538 DOI: 10.1016/j.crfs.2023.100433] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/08/2022] [Accepted: 01/02/2023] [Indexed: 01/05/2023] Open
Abstract
In order to explore the functions of glycosylation of κ-Casein (κ-CN) in bovine milk, unglycosylated (UG) and twice glycosylated (2G) forms of κ-CN B were purified by selective precipitation followed by anion exchange chromatography from κ-CN BB milk and tested for their amyloid fibril formation and morphology, oligomerisation states and protein structure. The diameter of self-assembled κ-CN B aggregates of both glyco-form were shown for the first time to be in the same 26.0-28.7 nm range for a 1 mg mL-1 solution. The presence of two bound glycans in the protein structure of 2G κ-CN B led to a greater increase in the maximum amyloid fibril formation rate with increasing protein concentration and a difference in both length (82.0 ± 29.9 vs 50.3 ± 13.7 nm) and width (8.6 ± 2.1 vs 13.9 ± 2.5 nm) for fibril morphology compared to UG κ-CN B. The present results suggest that amyloid fibril formation proceeds at a slow but steady rate via the self-assembly of dissociated, monomeric κ-CN B proteins at concentrations of 0.22-0.44 mg mL-1. However amyloid fibril formation proceeds more rapidly via the assembly of either aggregated κ-CN present in a micelle-like form or dissociated monomeric κ-CN, packed into reorganised formational structures above the critical micellar concentration to form fibrils of differing width. The degree of glycosylation has no effect on the polarity of the adjacent environment, nor non-covalent and disulphide interactions between protein molecules when in the native form. Yet glycosylation can influence protein folding patterns of κ-CN B leading to a reduced tryptophan intrinsic fluorescence intensity for 2G compared to UG κ-CN B. These results demonstrate that glycosylation plays an important role in the modulation of aggregation states of κ-CN and contributes to a better understanding of the role of glycosylation in the formation of amyloid fibrils from intrinsically disordered proteins.
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Affiliation(s)
- Barana Hewa Nadugala
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, VIC, 3052, Australia,CSIRO Agriculture and Food, Werribee Victoria, 3030, Australia
| | - Rick Hantink
- CSIRO Agriculture and Food, Werribee Victoria, 3030, Australia
| | - Tom Nebl
- Biology Group, Biomedical Manufacturing Program, CSIRO, Bayview Ave/Research Way, Clayton, VIC, 3168, Australia
| | - Jacinta White
- CSIRO Manufacturing, Bayview Avenue, Clayton, VIC, 3168, Australia
| | - Charles N. Pagel
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, VIC, 3052, Australia
| | - C.S. Ranadheera
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, VIC, 3052, Australia,Corresponding author.
| | - Amy Logan
- CSIRO Agriculture and Food, Werribee Victoria, 3030, Australia,Corresponding author.
| | - Jared K. Raynes
- School of Chemical and Biomolecular Engineering, Faculty of Engineering, The University of Sydney, NSW, 2006, Australia
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Nesterowicz M, Żendzian-Piotrowska M, Ładny JR, Zalewska A, Maciejczyk M. Antiglycoxidative properties of amantadine – a systematic review and comprehensive in vitro study. J Enzyme Inhib Med Chem 2023; 38:138-155. [PMID: 36325591 PMCID: PMC9639497 DOI: 10.1080/14756366.2022.2137161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
An important drug used in the treatment of Parkinson’s disease is amantadine. We are the first to perform a comprehensive study based on various glycation and oxidation factors, determining the impact of amantadine on protein glycoxidation. Sugars (glucose, fructose, galactose) and aldehydes (glyoxal, methylglyoxal) were used as glycation agents, and chloramine T was used as an oxidant. Glycoxidation biomarkers in albumin treated with amantadine were generally not different from the control group (glycation/oxidation factors), indicating that the drug did not affect oxidation and glycation processes. Molecular docking analysis did not reveal strong binding sites of amantadine on the bovine serum albumin structure. Although amantadine poorly scavenged hydroxyl radical and hydrogen peroxide, it had significantly lower antioxidant and antiglycation effect than all protein oxidation and glycation inhibitors. In some cases, amantadine even demonstrated glycoxidant, proglycation, and prooxidant properties. In summary, amantadine exhibited weak antioxidant properties and a lack of antiglycation activity.
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Affiliation(s)
- Miłosz Nesterowicz
- Students’ Scientific Club “Biochemistry of Civilization Diseases” at the Department of Hygiene, Epidemiology and Ergonomics, Medical University of Bialystok, Białystok, Poland
| | | | - Jerzy Robert Ładny
- 1st Department of General Surgery and Endocrinology, Medical University of Bialystok, Białystok, Poland
| | - Anna Zalewska
- Independent Laboratory of Experimental Dentistry, Medical University of Bialystok, Białystok, Poland
| | - Mateusz Maciejczyk
- Department of Hygiene, Epidemiology and Ergonomics, Medical University of Bialystok, Białystok, Poland
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45
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Rosa E, Gallo E, Sibillano T, Giannini C, Rizzuti S, Gianolio E, Scognamiglio PL, Morelli G, Accardo A, Diaferia C. Incorporation of PEG Diacrylates (PEGDA) Generates Hybrid Fmoc-FF Hydrogel Matrices. Gels 2022; 8:gels8120831. [PMID: 36547355 PMCID: PMC9778368 DOI: 10.3390/gels8120831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022] Open
Abstract
Generated by a hierarchical and multiscale self-assembling phenomenon, peptide-based hydrogels (HGs) are soft materials useful for a variety of applications. Short and ultra-short peptides are intriguing building blocks for hydrogel fabrication. These matrices can also be obtained by mixing low-molecular-weight peptides with other chemical entities (e.g., polymers, other peptides). The combination of two or more constituents opens the door to the development of hybrid systems with tunable mechanical properties and unexpected biofunctionalities or morphologies. For this scope, the formulation, the multiscale analysis, and the supramolecular characterization of novel hybrid peptide-polymer hydrogels are herein described. The proposed matrices contain the Fmoc-FF (Nα-fluorenylmethyloxycarbonyl diphenylalanine) hydrogelator at a concentration of 0.5 wt% (5.0 mg/mL) and a diacrylate α-/ω-substituted polyethylene-glycol derivative (PEGDA). Two PEGDA derivatives, PEGDA 1 and PEGDA2 (mean molecular weights of 575 and 250 Da, respectively), are mixed with Fmoc-FF at different ratios (Fmoc-FF/PEGDA at 1/1, 1/2, 1/5, 1/10 mol/mol). All the multicomponent hybrid peptide-polymer hydrogels are scrutinized with a large panel of analytical techniques (including proton relaxometry, FTIR, WAXS, rheometry, and scanning electronic microscopy). The matrices were found to be able to generate mechanical responses in the 2-8 kPa range, producing a panel of tunable materials with the same chemical composition. The release of a model drug (Naphthol Yellow S) is reported too. The tunable features, the different topologies, and the versatility of the proposed materials open the door to the development of tools for different applicative areas, including diagnostics, liquid biopsies and responsive materials. The incorporation of a diacrylate function also suggests the possible development of interpenetrating networks upon cross-linking reactions. All the collected data allow a mutual comparison between the different matrices, thus confirming the significance of the hybrid peptide/polymer-based methodology as a strategy for the design of innovative materials.
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Affiliation(s)
- Elisabetta Rosa
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples “Federico II”, Via Montesano 49, 80131 Naples, Italy
| | - Enrico Gallo
- IRCCS Synlab SDN, Via E. Gianturco 113, 80143 Naples, Italy
| | - Teresa Sibillano
- Institute of Crystallography (IC), CNR, Via Amendola 122, 70126 Bari, Italy
| | - Cinzia Giannini
- Institute of Crystallography (IC), CNR, Via Amendola 122, 70126 Bari, Italy
| | - Serena Rizzuti
- Department of Molecular Biotechnologies and Health Science, University of Turin, Via Nizza 52, 10125 Turin, Italy
| | - Eliana Gianolio
- Department of Molecular Biotechnologies and Health Science, University of Turin, Via Nizza 52, 10125 Turin, Italy
| | | | - Giancarlo Morelli
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples “Federico II”, Via Montesano 49, 80131 Naples, Italy
| | - Antonella Accardo
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples “Federico II”, Via Montesano 49, 80131 Naples, Italy
| | - Carlo Diaferia
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples “Federico II”, Via Montesano 49, 80131 Naples, Italy
- Correspondence: ; Tel.: +39-0812-534-526
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Inhibition of lysozyme amyloid fibrillation by curcumin-conjugated silver nanoparticles: A multispectroscopic molecular level study. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.121156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Murakami K, Sakaguchi Y, Taniwa K, Izuo N, Hanaki M, Kawase T, Hirose K, Shimizu T, Irie K. Lysine-targeting inhibition of amyloid β oligomerization by a green perilla-derived metastable chalcone in vitro and in vivo. RSC Chem Biol 2022; 3:1380-1396. [PMID: 36544574 PMCID: PMC9709778 DOI: 10.1039/d2cb00194b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 10/16/2022] [Indexed: 12/05/2022] Open
Abstract
Oligomers of amyloid β (Aβ) represent an early aggregative form that causes neurotoxicity in the pathogenesis of Alzheimer's disease (AD). Thus, preventing Aβ aggregation is important for preventing AD. Despite intensive studies on dietary compounds with anti-aggregation properties, some identified compounds are susceptible to autoxidation and/or hydration upon incubation in water, leaving unanswered issues regarding which active structures in metastable compounds are actually responsible for the inhibition of Aβ aggregation. In this study, we observed the site-specific inhibition of 42-mer Aβ (Aβ42) oligomerization by the green perilla-derived chalcone 2',3'-dihydroxy-4',6'-dimethoxychalcone (DDC), which was converted to its decomposed flavonoids (dDDC, 1-3) via nucleophilic aromatic substitution with water molecules. DDC suppressed Aβ42 fibrillization and slowed the transformation of the β-sheet structure, which is rich in Aβ42 aggregates. To validate the contribution of dDDC to the inhibitory effects of DDC on Aβ42 aggregation, we synthesized 1-3 and identified 3, a catechol-type flavonoid, as one of the active forms of DDC. 1H-15N SOFAST-HMQC NMR revealed that 1-3 as well as DDC could interact with residues between His13 and Leu17, which were near the intermolecular β-sheet (Gln15-Ala21). The nucleation in Aβ42 aggregates involves the rate-limiting formation of low-molecular-weight oligomers. The formation of a Schiff base with dDDC at Lys16 and Lys28 in the dimer through autoxidation of dDDC was associated with the suppression of Aβ42 nucleation. Of note, in two AD mouse models using immunoaffinity purification-mass spectrometry, adduct formation between dDDC and brain Aβ was observed in a similar manner as reported in vitro. The present findings unraveled the lysine-targeting inhibitory mechanism of metastable dietary ingredients regarding Aβ oligomerization.
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Affiliation(s)
- Kazuma Murakami
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto UniversityKyoto606-8502Japan
| | - Yoshiki Sakaguchi
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto UniversityKyoto606-8502Japan
| | - Kota Taniwa
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto UniversityKyoto606-8502Japan
| | - Naotaka Izuo
- Department of Endocrinology, Hematology and Gerontology, Graduate School of Medicine, Chiba UniversityChiba260-8670Japan
| | - Mizuho Hanaki
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto UniversityKyoto606-8502Japan
| | | | | | - Takahiko Shimizu
- Department of Endocrinology, Hematology and Gerontology, Graduate School of Medicine, Chiba UniversityChiba260-8670Japan
| | - Kazuhiro Irie
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto UniversityKyoto606-8502Japan
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48
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Optical Study of Lysozyme Molecules in Aqueous Solutions after Exposure to Laser-Induced Breakdown. Biomolecules 2022; 12:biom12111613. [DOI: 10.3390/biom12111613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/28/2022] [Accepted: 10/29/2022] [Indexed: 11/06/2022] Open
Abstract
The properties of a lysozyme solution under laser-induced breakdown were studied. An optical breakdown under laser action in protein solutions proceeds with high efficiency: the formation of plasma and acoustic oscillations is observed. The concentration of protein molecules has very little effect on the physicochemical characteristics of optical breakdown. After exposure to optical breakdown, changes were observed in the enzymatic activity of lysozyme, absorption and fluorescence spectra, viscosity, and the sizes of molecules and aggregates of lysozyme measured by dynamic light scattering. However, the refractive index of the solution and the Raman spectrum did not change. The appearance of a new fluorescence peak was observed upon excitation at 350 nm and emission at 434 nm at exposure for 30 min. Previously, a peak in this range was associated with the fluorescence of amyloid fibrils. However, neither the ThT assay nor the circular dichroism dispersion confirmed the formation of amyloid fibrils. Probably, under the influence of optical breakdown, a small part of the protein degraded, and a part changed its native state and aggregated, forming functional dimers or “native aggregates”.
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49
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Synthetic Amphipathic β-Sheet Temporin-Derived Peptide with Dual Antibacterial and Anti-Inflammatory Activities. Antibiotics (Basel) 2022; 11:antibiotics11101285. [PMID: 36289944 PMCID: PMC9598925 DOI: 10.3390/antibiotics11101285] [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: 09/02/2022] [Revised: 09/15/2022] [Accepted: 09/19/2022] [Indexed: 11/18/2022] Open
Abstract
Temporin family is one of the largest among antimicrobial peptides (AMPs), which act mainly by penetrating and disrupting the bacterial membranes. To further understand the relationship between the physical-chemical properties and their antimicrobial activity and selectivity, an analogue of Temporin L, [Nle1, dLeu9, dLys10]TL (Nle-Phe-Val-Pro-Trp-Phe-Lys-Phe-dLeu-dLys-Arg-Ile-Leu-CONH2) has been developed in the present work. The design strategy consisted of the addition of a norleucine residue at the N-terminus of the lead peptide sequence, [dLeu9, dLys10]TL, previously developed by our group. This modification promoted an increase of peptide hydrophobicity and, interestingly, more efficient activity against both Gram-positive and Gram-negative strains, without affecting human keratinocytes and red blood cells survival compared to the lead peptide. Thus, this novel compound was subjected to biophysical studies, which showed that the peptide [Nle1, dLeu9, dLys10]TL is unstructured in water, while it adopts β-type conformation in liposomes mimicking bacterial membranes, in contrast to its lead peptide forming α-helical aggregates. After its aggregation in the bacterial membrane, [Nle1, dLeu9, dLys10]TL induced membrane destabilization and deformation. In addition, the increase of peptide hydrophobicity did not cause a loss of anti-inflammatory activity of the peptide [Nle1, dLeu9, dLys10]TL in comparison with its lead peptide. In this study, our results demonstrated that positive net charge, optimum hydrophobic−hydrophilic balance, and chain length remain the most important parameters to be addressed while designing small cationic AMPs.
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Thieu MT, Shin J, Ogawa T, Park EJ, Kwon J, Ha TH, Kim YH, Ahn SJ. Scanning electron microscopy imaging of insulin amyloid fibrils directly grown on silicon substrate: A suggestion for complementary imaging strategy. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Minh Thu Thieu
- Korea Research Institute of Standards and Science (KRISS) Yuseong‐gu, Daejeon Republic of Korea
- Major of Nano Science Korea University of Science and Technology (UST) Yuseong‐gu, Daejeon Republic of Korea
| | - Jihoon Shin
- Core Research Facility & Analysis Center Korea Research Institute of Bioscience and Biotechnology (KRIBB) Yuseong‐gu, Daejeon Republic of Korea
| | - Takashi Ogawa
- Korea Research Institute of Standards and Science (KRISS) Yuseong‐gu, Daejeon Republic of Korea
- Major of Nano Science Korea University of Science and Technology (UST) Yuseong‐gu, Daejeon Republic of Korea
| | - Eun Jin Park
- Core Research Facility & Analysis Center Korea Research Institute of Bioscience and Biotechnology (KRIBB) Yuseong‐gu, Daejeon Republic of Korea
- Department of Nanobiotechnology, KRIBB School of Biotechnology Korea University of Science and Technology (UST) Yuseong‐gu, Daejeon Republic of Korea
| | - Ji‐Hwan Kwon
- Korea Research Institute of Standards and Science (KRISS) Yuseong‐gu, Daejeon Republic of Korea
- Major of Nano Science Korea University of Science and Technology (UST) Yuseong‐gu, Daejeon Republic of Korea
| | - Tai Hwan Ha
- Core Research Facility & Analysis Center Korea Research Institute of Bioscience and Biotechnology (KRIBB) Yuseong‐gu, Daejeon Republic of Korea
- Department of Nanobiotechnology, KRIBB School of Biotechnology Korea University of Science and Technology (UST) Yuseong‐gu, Daejeon Republic of Korea
| | - Young Heon Kim
- Graduate School of Analytical Science and Technology (GRAST) Chungnam National University Yuseong‐gu, Daejeon Republic of Korea
| | - Sang Jung Ahn
- Korea Research Institute of Standards and Science (KRISS) Yuseong‐gu, Daejeon Republic of Korea
- Major of Nano Science Korea University of Science and Technology (UST) Yuseong‐gu, Daejeon Republic of Korea
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