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Li D, Wang S, Dong J, Li J, Wang X, Liu F, Ba X. Inhibition and disaggregation effect of flavonoid-derived carbonized polymer dots on protein amyloid aggregation. Colloids Surf B Biointerfaces 2024; 238:113928. [PMID: 38692175 DOI: 10.1016/j.colsurfb.2024.113928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 04/19/2024] [Accepted: 04/23/2024] [Indexed: 05/03/2024]
Abstract
In this research, four water-insoluble flavonoid compounds were utilized and reacted with arginine to prepare four carbonized polymer dots with good water-solubility in a hydrothermal reactor. Structural characterization demonstrated that the prepared carbonized polymer dots were classic core-shell structure. Effect of the prepared carbonized polymer dots on protein amyloid aggregation was further investigated using hen egg white lysozyme and human lysozyme as model protein in aqueous solution. All of the prepared carbonized polymer dots could retard the amyloid aggregation of hen egg white lysozyme and human lysozyme in a dose-depended manner. All measurements displayed that the inhibition ratio of luteolin-derived carbonized polymer dots (CPDs-1) was higher than that of the other three carbonized polymer dots under the same dosage. This result may be interpreted by the highest content of phenolic hydroxyl groups on the periphery. The inhibition ratio of CPDs-1 on hen egg white lysozyme and human lysozyme reached 88 % and 83 % at the concentration of 0.5 mg/mL, respectively. CPDs-1 also could disaggregate the formed mature amyloid fibrils into short aggregates.
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Affiliation(s)
- Dexin Li
- College of Chemistry and Materials Science, Hebei University, Baoding 071002, PR China
| | - Sujuan Wang
- College of Chemistry and Materials Science, Hebei University, Baoding 071002, PR China.
| | - Jiawei Dong
- College of Chemistry and Materials Science, Hebei University, Baoding 071002, PR China
| | - Jie Li
- College of Chemistry and Materials Science, Hebei University, Baoding 071002, PR China
| | - Xinnan Wang
- College of Chemistry and Materials Science, Hebei University, Baoding 071002, PR China
| | - Feng Liu
- College of Chemistry and Materials Science, Hebei University, Baoding 071002, PR China
| | - Xinwu Ba
- College of Chemistry and Materials Science, Hebei University, Baoding 071002, PR China.
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2
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Nazarova A, Shiabiev I, Shibaeva K, Mostovaya O, Mukhametzyanov T, Khannanov A, Evtugyn V, Zelenikhin P, Shi X, Shen M, Padnya P, Stoikov I. Thiacalixarene Carboxylic Acid Derivatives as Inhibitors of Lysozyme Fibrillation. Int J Mol Sci 2024; 25:4721. [PMID: 38731940 PMCID: PMC11083589 DOI: 10.3390/ijms25094721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/19/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024] Open
Abstract
Amyloid fibroproliferation leads to organ damage and is associated with a number of neurodegenerative diseases affecting populations worldwide. There are several ways to protect against fibril formation, including inhibition. A variety of organic compounds based on molecular recognition of amino acids within the protein have been proposed for the design of such inhibitors. However, the role of macrocyclic compounds, i.e., thiacalix[4]arenes, in inhibiting fibrillation is still almost unknown. In the present work, the use of water-soluble thiacalix[4]arene derivatives for the inhibition of hen egg-white lysozyme (HEWL) amyloid fibrillation is proposed for the first time. The binding of HEWL by the synthesized thiacalix[4]arenes (logKa = 5.05-5.13, 1:1 stoichiometry) leads to the formation of stable supramolecular systems capable of stabilizing the protein structure and protecting against fibrillation by 29-45%. The macrocycle conformation has little effect on protein binding strength, and the native HEWL secondary structure does not change via interaction. The synthesized compounds are non-toxic to the A549 cell line in the range of 0.5-250 µg/mL. The results obtained may be useful for further investigation of the anti-amyloidogenic role of thiacalix[4]arenes, and also open up future prospects for the creation of new ways to prevent neurodegenerative diseases.
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Affiliation(s)
- Anastasia Nazarova
- A. M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia
| | - Igor Shiabiev
- A. M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia
| | - Ksenia Shibaeva
- A. M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia
| | - Olga Mostovaya
- A. M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia
| | - Timur Mukhametzyanov
- A. M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia
| | - Arthur Khannanov
- A. M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia
| | - Vladimir Evtugyn
- Interdisciplinary Center of Analytical Microscopy, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia
| | - Pavel Zelenikhin
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia
| | - Xiangyang Shi
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Biological Science and Medical Engineering, Donghua University, Shanghai 201620, China
- CQM—Centro de Química da Madeira, Universidade da Madeira, Campus Universitário da Penteada, 9020-105 Funchal, Portugal
| | - Mingwu Shen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Biological Science and Medical Engineering, Donghua University, Shanghai 201620, China
| | - Pavel Padnya
- A. M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia
| | - Ivan Stoikov
- A. M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia
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3
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Chin NA, Dinsmore D, Gonzales T, Groves B, Johnson D, Napolitano J, Ropper A, Salloway S, Weiss L. Alzheimer's Disease - Anti-Amyloid Medications, Early Detection, and Screening. N Engl J Med 2024; 390:e22. [PMID: 38446673 DOI: 10.1056/nejmp2310176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Affiliation(s)
- Nathaniel A Chin
- From University of Wisconsin Medicine, Madison (N.A.C.); and Brown University and Butler Hospital, Providence, RI (S.S.)
| | - Debra Dinsmore
- From University of Wisconsin Medicine, Madison (N.A.C.); and Brown University and Butler Hospital, Providence, RI (S.S.)
| | - Tony Gonzales
- From University of Wisconsin Medicine, Madison (N.A.C.); and Brown University and Butler Hospital, Providence, RI (S.S.)
| | - Betsy Groves
- From University of Wisconsin Medicine, Madison (N.A.C.); and Brown University and Butler Hospital, Providence, RI (S.S.)
| | - DeLois Johnson
- From University of Wisconsin Medicine, Madison (N.A.C.); and Brown University and Butler Hospital, Providence, RI (S.S.)
| | - Julia Napolitano
- From University of Wisconsin Medicine, Madison (N.A.C.); and Brown University and Butler Hospital, Providence, RI (S.S.)
| | - Allan Ropper
- From University of Wisconsin Medicine, Madison (N.A.C.); and Brown University and Butler Hospital, Providence, RI (S.S.)
| | - Stephen Salloway
- From University of Wisconsin Medicine, Madison (N.A.C.); and Brown University and Butler Hospital, Providence, RI (S.S.)
| | - Lori Weiss
- From University of Wisconsin Medicine, Madison (N.A.C.); and Brown University and Butler Hospital, Providence, RI (S.S.)
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4
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Catania M, Colombo L, Sorrentino S, Cagnotto A, Lucchetti J, Barbagallo MC, Vannetiello I, Vecchi ER, Favagrossa M, Costanza M, Giaccone G, Salmona M, Tagliavini F, Di Fede G. A novel bio-inspired strategy to prevent amyloidogenesis and synaptic damage in Alzheimer's disease. Mol Psychiatry 2022; 27:5227-5234. [PMID: 36028569 PMCID: PMC9763104 DOI: 10.1038/s41380-022-01745-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/01/2022] [Accepted: 08/11/2022] [Indexed: 01/19/2023]
Abstract
Alzheimer's disease (AD) is an irreversible neurodegenerative disorder that affects millions of people worldwide. AD pathogenesis is intricate. It primarily involves two main molecular players-amyloid-β (Aβ) and tau-which actually have an intrinsic trend to generate molecular assemblies that are toxic to neurons. Incomplete knowledge of the molecular mechanisms inducing the onset and sustaining the progression of the disease, as well as the lack of valid models to fully recapitulate the pathogenesis of human disease, have until now hampered the development of a successful therapy for AD. The overall experience with clinical trials with a number of potential drugs-including the recent outcomes of studies with monoclonal antibodies against Aβ-seems to indicate that Aβ-targeting is not effective if it is not accompanied by an efficient challenge of Aβ neurotoxic properties. We took advantage from the discovery of a naturally-occurring variant of Aβ (AβA2V) that has anti-amyloidogenic properties, and designed a novel bio-inspired strategy for AD based on the intranasal delivery of a six-mer peptide (Aβ1-6A2V) retaining the anti-amyloidogenic abilities of the full-length AβA2V variant. This approach turned out to be effective in preventing the aggregation of wild type Aβ and averting the synaptic damage associated with amyloidogenesis in a mouse model of AD. The results of our preclinical studies inspired by a protective model already existing in nature, that is the human heterozygous AβA2V carriers which seem to be protected from AD, open the way to an unprecedented and promising approach for the prevention of the disease in humans.
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Affiliation(s)
- Marcella Catania
- Neurology V - Neuropathology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133, Milan, Italy
| | - Laura Colombo
- Department of Molecular Biochemistry and Pharmacology, IRCCS Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy
| | - Stefano Sorrentino
- Neurology V - Neuropathology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133, Milan, Italy
| | - Alfredo Cagnotto
- Department of Molecular Biochemistry and Pharmacology, IRCCS Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy
| | - Jacopo Lucchetti
- Department of Molecular Biochemistry and Pharmacology, IRCCS Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy
| | - Maria Chiara Barbagallo
- Neurology V - Neuropathology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133, Milan, Italy
| | - Ilaria Vannetiello
- Neurology V - Neuropathology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133, Milan, Italy
| | - Elena Rita Vecchi
- Neurology V - Neuropathology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133, Milan, Italy
| | - Monica Favagrossa
- Department of Molecular Biochemistry and Pharmacology, IRCCS Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy
| | - Massimo Costanza
- Molecular Neuro-Oncology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133, Milan, Italy
| | - Giorgio Giaccone
- Neurology V - Neuropathology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133, Milan, Italy
| | - Mario Salmona
- Department of Molecular Biochemistry and Pharmacology, IRCCS Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy
| | - Fabrizio Tagliavini
- Neurology V - Neuropathology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133, Milan, Italy
| | - Giuseppe Di Fede
- Neurology V - Neuropathology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133, Milan, Italy.
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Loureiro JA, Andrade S, Goderis L, Gomez-Gutierrez R, Soto C, Morales R, Pereira MC. (De)stabilization of Alpha-Synuclein Fibrillary Aggregation by Charged and Uncharged Surfactants. Int J Mol Sci 2021; 22:ijms222212509. [PMID: 34830391 PMCID: PMC8624236 DOI: 10.3390/ijms222212509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/15/2021] [Accepted: 11/17/2021] [Indexed: 11/25/2022] Open
Abstract
Parkinson’s disease (PD) is the second most common neurodegenerative disorder. An important hallmark of PD involves the pathological aggregation of proteins in structures known as Lewy bodies. The major component of these proteinaceous inclusions is alpha (α)-synuclein. In different conditions, α-synuclein can assume conformations rich in either α-helix or β-sheets. The mechanisms of α-synuclein misfolding, aggregation, and fibrillation remain unknown, but it is thought that β-sheet conformation of α-synuclein is responsible for its associated toxic mechanisms. To gain fundamental insights into the process of α-synuclein misfolding and aggregation, the secondary structure of this protein in the presence of charged and non-charged surfactant solutions was characterized. The selected surfactants were (anionic) sodium dodecyl sulphate (SDS), (cationic) cetyltrimethylammonium chloride (CTAC), and (uncharged) octyl β-D-glucopyranoside (OG). The effect of surfactants in α-synuclein misfolding was assessed by ultra-structural analyses, in vitro aggregation assays, and secondary structure analyses. The α-synuclein aggregation in the presence of negatively charged SDS suggests that SDS-monomer complexes stimulate the aggregation process. A reduction in the electrostatic repulsion between N- and C-terminal and in the hydrophobic interactions between the NAC (non-amyloid beta component) region and the C-terminal seems to be important to undergo aggregation. Fourier transform infrared spectroscopy (FTIR) measurements show that β-sheet structures comprise the assembly of the fibrils.
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Affiliation(s)
- Joana Angélica Loureiro
- LEPABE, Department of Chemical Engineering, Faculty of Engineering of the University of Porto, 4200-465 Porto, Portugal;
- Correspondence: (J.A.L.); (M.C.P.)
| | - Stéphanie Andrade
- LEPABE, Department of Chemical Engineering, Faculty of Engineering of the University of Porto, 4200-465 Porto, Portugal;
| | - Lies Goderis
- Faculty of Pharmaceutical Sciences, Ghent University, Sint-Pietersnieuwstraat 25, B-9000 Ghent, Belgium;
| | - Ruben Gomez-Gutierrez
- Department of Neurology, The University of Texas Health Science Centre at Houston, Houston, TX 77030, USA; (R.G.-G.); (C.S.); (R.M.)
- Department of Cell Biology, University of Malaga, 29071 Malaga, Spain
| | - Claudio Soto
- Department of Neurology, The University of Texas Health Science Centre at Houston, Houston, TX 77030, USA; (R.G.-G.); (C.S.); (R.M.)
| | - Rodrigo Morales
- Department of Neurology, The University of Texas Health Science Centre at Houston, Houston, TX 77030, USA; (R.G.-G.); (C.S.); (R.M.)
- CIBQA, Universidad Bernardo O’Higgins, Santiago 1497, Chile
| | - Maria Carmo Pereira
- LEPABE, Department of Chemical Engineering, Faculty of Engineering of the University of Porto, 4200-465 Porto, Portugal;
- Correspondence: (J.A.L.); (M.C.P.)
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Baussanne I, Firstova O, Dediu AB, Larosa C, Furdui B, Ghinea IO, Thomas A, Chierici S, Dinica R, Demeunynck M. Interest of novel N-alkylpyridinium-indolizine hybrids in the field of Alzheimer's disease: Synthesis, characterization and evaluation of antioxidant activity, cholinesterase inhibition, and amyloid fibrillation interference. Bioorg Chem 2021; 116:105390. [PMID: 34670332 DOI: 10.1016/j.bioorg.2021.105390] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 09/17/2021] [Accepted: 09/26/2021] [Indexed: 12/17/2022]
Abstract
A small library of molecules combining indolizine and N-alkyl pyridinium was synthesized and evaluated in a multi-target-directed-ligand strategy for Alzheimer's disease (AD) treatment. The new compounds were classified in three series depending on the number of methylene residues linking the two heterocycles (Ind-PyCx with x = 0, 2 or 3). The molecules were synthesized from the corresponding bis-pyridines by two-step formation of the indolizine core including mono-alkylation of pyridine and 1,3-dipolar cycloaddition with an alkylpropiolate. Their activities against AD's key-targets were evaluated in vitro: acetyl- and butyrylcholinesterase (AChE and BChE) inhibition, antioxidant properties and inhibition of amyloid fibril formation. None of the three series showed significant activities against all the targets. The Ind-PyC2 and Ind-PyC3 series are active on eeAChE and hAChE (µM IC50 values). Most of the positively charged molecules from these two series also appeared active against eqBChE, however they lost their activity on hBChE. Comparative molecular modeling of 13 and 15 docked in hAChE and hBChE highlighted the importance of the substituent (p-methoxybenzoyl or methyloxycarbonyl, respectively) located on the indolizine C-3 for the binding. The larger molecule 13 fits more tightly at the active site of the two enzymes than 15 that shows a larger degree of freedom. The Ind-PyC2 and Ind-PyC3 hybrids displayed some antioxidant activity when tested at 750 µg/mL (up to 95% inhibition of DPPH radical scavenging for 10). In both series, most hybrids were also able to interact with amyloid fibers, even if the inhibitory effect was observed at a high 100 µM concentration. The Ind-PyC0 molecules stand out completely due to their spectroscopic properties which prevent their evaluation by Ellman's and ThT assays. However, these molecules showed interesting features in the presence of preformed fibers. In particular, the strong increase in fluorescence of 3 in the presence of amyloid fibers is very promising for its use as a fibrillation fluorescent reporter dye.
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Affiliation(s)
| | - Olga Firstova
- Univ. Grenoble Alpes, CNRS, DPM, Grenoble, France; Univ. Grenoble Alpes, CNRS, DCM, Grenoble, France
| | - Andreea Botezatu Dediu
- Dunarea de Jos University of Galaţi, Faculty of Science and Environment, 111 Domneasca Street, 800201 Galaţi, Romania
| | | | - Bianca Furdui
- Dunarea de Jos University of Galaţi, Faculty of Science and Environment, 111 Domneasca Street, 800201 Galaţi, Romania
| | - Ioana Ottilia Ghinea
- Dunarea de Jos University of Galaţi, Faculty of Science and Environment, 111 Domneasca Street, 800201 Galaţi, Romania
| | - Aline Thomas
- Univ. Grenoble Alpes, CNRS, DPM, Grenoble, France
| | | | - Rodica Dinica
- Dunarea de Jos University of Galaţi, Faculty of Science and Environment, 111 Domneasca Street, 800201 Galaţi, Romania.
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Chaudhary H, Iashchishyn IA, Romanova NV, Rambaran MA, Musteikyte G, Smirnovas V, Holmboe M, Ohlin CA, Svedružić ŽM, Morozova-Roche LA. Polyoxometalates as Effective Nano-inhibitors of Amyloid Aggregation of Pro-inflammatory S100A9 Protein Involved in Neurodegenerative Diseases. ACS Appl Mater Interfaces 2021; 13:26721-26734. [PMID: 34080430 PMCID: PMC8289188 DOI: 10.1021/acsami.1c04163] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Pro-inflammatory and amyloidogenic S100A9 protein is central to the amyloid-neuroinflammatory cascade in neurodegenerative diseases. Polyoxometalates (POMs) constitute a diverse group of nanomaterials, which showed potency in amyloid inhibition. Here, we have demonstrated that two selected nanosized niobium POMs, Nb10 and TiNb9, can act as potent inhibitors of S100A9 amyloid assembly. Kinetics analysis based on ThT fluorescence experiments showed that addition of either Nb10 or TiNb9 reduces the S100A9 amyloid formation rate and amyloid quantity. Atomic force microscopy imaging demonstrated the complete absence of long S100A9 amyloid fibrils at increasing concentrations of either POM and the presence of only round-shaped and slightly elongated aggregates. Molecular dynamics simulation revealed that both Nb10 and TiNb9 bind to native S100A9 homo-dimer by forming ionic interactions with the positively charged Lys residue-rich patches on the protein surface. The acrylamide quenching of intrinsic fluorescence showed that POM binding does not perturb the Trp 88 environment. The far and near UV circular dichroism revealed no large-scale perturbation of S100A9 secondary and tertiary structures upon POM binding. These indicate that POM binding involves only local conformational changes in the binding sites. By using intrinsic and 8-anilino-1-naphthalene sulfonate fluorescence titration experiments, we found that POMs bind to S100A9 with a Kd of ca. 2.5 μM. We suggest that the region, including Lys 50 to Lys 54 and characterized by high amyloid propensity, could be the key sequences involved in S1009 amyloid self-assembly. The inhibition and complete hindering of S100A9 amyloid pathways may be used in the therapeutic applications targeting the amyloid-neuroinflammatory cascade in neurodegenerative diseases.
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Affiliation(s)
- Himanshu Chaudhary
- Department
of Medical Biochemistry and Biophysics, Umeå University, Umeå 90187, Sweden
| | - Igor A. Iashchishyn
- Department
of Medical Biochemistry and Biophysics, Umeå University, Umeå 90187, Sweden
| | - Nina V. Romanova
- Department
of Medical Biochemistry and Biophysics, Umeå University, Umeå 90187, Sweden
| | | | - Greta Musteikyte
- Institute
of Biotechnology, Life Sciences Center, Vilnius University, Vilnius LT-10257, Lithuania
| | - Vytautas Smirnovas
- Institute
of Biotechnology, Life Sciences Center, Vilnius University, Vilnius LT-10257, Lithuania
| | - Michael Holmboe
- Department
of Chemistry, Umeå University, 90187 Umeå, Sweden
| | - C. André Ohlin
- Department
of Chemistry, Umeå University, 90187 Umeå, Sweden
| | | | - Ludmilla A. Morozova-Roche
- Department
of Medical Biochemistry and Biophysics, Umeå University, Umeå 90187, Sweden
- . Tel.: +46736205283. Fax: +46907865283
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Fukui N, Yamamoto H, Miyabe M, Aoyama Y, Hongo K, Mizobata T, Kawahata I, Yabuki Y, Shinoda Y, Fukunaga K, Kawata Y. An α-synuclein decoy peptide prevents cytotoxic α-synuclein aggregation caused by fatty acid binding protein 3. J Biol Chem 2021; 296:100663. [PMID: 33862084 PMCID: PMC8131325 DOI: 10.1016/j.jbc.2021.100663] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 04/07/2021] [Accepted: 04/12/2021] [Indexed: 12/23/2022] Open
Abstract
α-synuclein (αSyn) is a protein known to form intracellular aggregates during the manifestation of Parkinson’s disease. Previously, it was shown that αSyn aggregation was strongly suppressed in the midbrain region of mice that did not possess the gene encoding the lipid transport protein fatty acid binding protein 3 (FABP3). An interaction between these two proteins was detected in vitro, suggesting that FABP3 may play a role in the aggregation and deposition of αSyn in neurons. To characterize the molecular mechanisms that underlie the interactions between FABP3 and αSyn that modulate the cellular accumulation of the latter, in this report, we used in vitro fluorescence assays combined with fluorescence microscopy, transmission electron microscopy, and quartz crystal microbalance assays to characterize in detail the process and consequences of FABP3–αSyn interaction. We demonstrated that binding of FABP3 to αSyn results in changes in the aggregation mechanism of the latter; specifically, a suppression of fibrillar forms of αSyn and also the production of aggregates with an enhanced cytotoxicity toward mice neuro2A cells. Because this interaction involved the C-terminal sequence region of αSyn, we tested a peptide derived from this region of αSyn (αSynP130-140) as a decoy to prevent the FABP3–αSyn interaction. We observed that the peptide competitively inhibited binding of αSyn to FABP3 in vitro and in cultured cells. We propose that administration of αSynP130-140 might be used to prevent the accumulation of toxic FABP3-αSyn oligomers in cells, thereby preventing the progression of Parkinson’s disease.
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Affiliation(s)
- Naoya Fukui
- Department of Chemistry and Biotechnology, Faculty of Engineering/Graduate School of Engineering, Tottori University, Tottori, Japan
| | - Hanae Yamamoto
- Department of Chemistry and Biotechnology, Faculty of Engineering/Graduate School of Engineering, Tottori University, Tottori, Japan
| | - Moe Miyabe
- Department of Chemistry and Biotechnology, Faculty of Engineering/Graduate School of Engineering, Tottori University, Tottori, Japan
| | - Yuki Aoyama
- Department of Chemistry and Biotechnology, Faculty of Engineering/Graduate School of Engineering, Tottori University, Tottori, Japan
| | - Kunihiro Hongo
- Department of Chemistry and Biotechnology, Faculty of Engineering/Graduate School of Engineering, Tottori University, Tottori, Japan; Department of Biomedical Science, Institute of Regenerative Medicine and Biofunction, Graduate School of Medical Science, Tottori University, Tottori, Japan; Center for Research on Green Sustainable Chemistry, Tottori University, Tottori, Japan
| | - Tomohiro Mizobata
- Department of Chemistry and Biotechnology, Faculty of Engineering/Graduate School of Engineering, Tottori University, Tottori, Japan; Department of Biomedical Science, Institute of Regenerative Medicine and Biofunction, Graduate School of Medical Science, Tottori University, Tottori, Japan; Center for Research on Green Sustainable Chemistry, Tottori University, Tottori, Japan
| | - Ichiro Kawahata
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Yasushi Yabuki
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Yasuharu Shinoda
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Kohji Fukunaga
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Yasushi Kawata
- Department of Chemistry and Biotechnology, Faculty of Engineering/Graduate School of Engineering, Tottori University, Tottori, Japan; Department of Biomedical Science, Institute of Regenerative Medicine and Biofunction, Graduate School of Medical Science, Tottori University, Tottori, Japan; Center for Research on Green Sustainable Chemistry, Tottori University, Tottori, Japan.
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9
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Windsor PK, Plassmeyer SP, Mattock DS, Bradfield JC, Choi EY, Miller BR, Han BH. Biflavonoid-Induced Disruption of Hydrogen Bonds Leads to Amyloid-β Disaggregation. Int J Mol Sci 2021; 22:ijms22062888. [PMID: 33809196 PMCID: PMC8001082 DOI: 10.3390/ijms22062888] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/03/2021] [Accepted: 03/10/2021] [Indexed: 12/12/2022] Open
Abstract
Deposition of amyloid β (Aβ) fibrils in the brain is a key pathologic hallmark of Alzheimer’s disease. A class of polyphenolic biflavonoids is known to have anti-amyloidogenic effects by inhibiting aggregation of Aβ and promoting disaggregation of Aβ fibrils. In the present study, we further sought to investigate the structural basis of the Aβ disaggregating activity of biflavonoids and their interactions at the atomic level. A thioflavin T (ThT) fluorescence assay revealed that amentoflavone-type biflavonoids promote disaggregation of Aβ fibrils with varying potency due to specific structural differences. The computational analysis herein provides the first atomistic details for the mechanism of Aβ disaggregation by biflavonoids. Molecular docking analysis showed that biflavonoids preferentially bind to the aromatic-rich, partially ordered N-termini of Aβ fibril via the π–π interactions. Moreover, docking scores correlate well with the ThT EC50 values. Molecular dynamic simulations revealed that biflavonoids decrease the content of β-sheet in Aβ fibril in a structure-dependent manner. Hydrogen bond analysis further supported that the substitution of hydroxyl groups capable of hydrogen bond formation at two positions on the biflavonoid scaffold leads to significantly disaggregation of Aβ fibrils. Taken together, our data indicate that biflavonoids promote disaggregation of Aβ fibrils due to their ability to disrupt the fibril structure, suggesting biflavonoids as a lead class of compounds to develop a therapeutic agent for Alzheimer’s disease.
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Affiliation(s)
- Peter K. Windsor
- Department of Chemistry, Truman State University, Kirksville, MO 63501, USA; (P.K.W.); (S.P.P.); (D.S.M.); (J.C.B.)
| | - Stephen P. Plassmeyer
- Department of Chemistry, Truman State University, Kirksville, MO 63501, USA; (P.K.W.); (S.P.P.); (D.S.M.); (J.C.B.)
| | - Dominic S. Mattock
- Department of Chemistry, Truman State University, Kirksville, MO 63501, USA; (P.K.W.); (S.P.P.); (D.S.M.); (J.C.B.)
| | - Jonathan C. Bradfield
- Department of Chemistry, Truman State University, Kirksville, MO 63501, USA; (P.K.W.); (S.P.P.); (D.S.M.); (J.C.B.)
| | - Erika Y. Choi
- Department of Pharmacology, A.T. Still University, Kirksville, MO 63501, USA;
| | - Bill R. Miller
- Department of Chemistry, Truman State University, Kirksville, MO 63501, USA; (P.K.W.); (S.P.P.); (D.S.M.); (J.C.B.)
- Correspondence: (B.R.M.III); (B.H.H.)
| | - Byung Hee Han
- Department of Pharmacology, A.T. Still University, Kirksville, MO 63501, USA;
- Correspondence: (B.R.M.III); (B.H.H.)
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10
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Li J, Gao G, Tang X, Yu M, He M, Sun T. Isomeric Effect of Nano-Inhibitors on Aβ 40 Fibrillation at The Nano-Bio Interface. ACS Appl Mater Interfaces 2021; 13:4894-4904. [PMID: 33486955 DOI: 10.1021/acsami.0c21906] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Chemical and physical properties of nanobio interface substantially affect the conformational transitions of adjacent biomolecules. Previous studies have reported the chiral effect and charge effect of nanobio interface on the misfolding, aggregation, and fibrillation of amyloid protein. However, the isomeric effect of nanobio interface on protein/peptides amyloidosis is still unclear. Here, three isomeric nanobio interfaces were designed and fabricated based on the same sized gold nanoclusters (AuNCs) modified with 4-mercaptobenzoic acid (p-MBA), 3-mercaptobenzoic acid (m-MBA), and 2-mercaptobenzoic acid (o-MBA). Then three isomeric AuNCs were employed as models to explore the isomeric effect on the misfolding, aggregation, and fibrillation of Aβ40 at nanobio interfaces. Site-specific replacement experiments on the basis of theoretical analysis revealed the possible mechanism of Aβ40 interacting with isomeric ligands of AuNCs at the nanobio interfaces. The distance and orientation of -COOH group from the surface of AuNCs can affect the electrostatic interaction between isomeric ligands and the positively charged residues (R5, K16, and K28) of Aβ40, which may affect the inhibition efficiency of isomeric AuNCs on protein amyloidosis. Actually, the amyloid fibrillation kinetics results together with atomic force microscope (AFM) images, dynamic light scattering (DLS) results and circular dichroism (CD) spectra indeed proved that all the three isomeric AuNCs could inhibit the misfolding, aggregation and fibrillation of Aβ40 in a dose-dependent manner, and the inhibition efficiency was definitely different from each other. The inhibition efficiency of o-MBA-AuNCs was higher than that of m-MBA-AuNCs and p-MBA-AuNCs at the same dosage. These results provide an insight for isomeric effect at nanobio interfaces, and open an avenue for structure-based nanodrug design target Alzheimer's disease (AD) and even other protein conformational diseases.
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Affiliation(s)
- Jianhang Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, No.122 Luoshi Road, Wuhan 430070, China
| | - Guanbin Gao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, No.122 Luoshi Road, Wuhan 430070, China
| | - Xintong Tang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, No.122 Luoshi Road, Wuhan 430070, China
| | - Meng Yu
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, No.122 Luoshi Road, Wuhan 430070, China
| | - Meng He
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, No.122 Luoshi Road, Wuhan 430070, China
| | - Taolei Sun
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, No.122 Luoshi Road, Wuhan 430070, China
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11
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Cotrina EY, Oliveira Â, Leite JP, Llop J, Gales L, Quintana J, Cardoso I, Arsequell G. Repurposing Benzbromarone for Familial Amyloid Polyneuropathy: A New Transthyretin Tetramer Stabilizer. Int J Mol Sci 2020; 21:E7166. [PMID: 32998442 PMCID: PMC7583827 DOI: 10.3390/ijms21197166] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 09/24/2020] [Indexed: 12/19/2022] Open
Abstract
Transthyretin (TTR) is a homotetrameric protein involved in human amyloidosis, including familial amyloid polyneuropathy (FAP). Discovering small-molecule stabilizers of the TTR tetramer is a therapeutic strategy for these diseases. Tafamidis, the only approved drug for FAP treatment, is not effective for all patients. Herein, we discovered that benzbromarone (BBM), a uricosuric drug, is an effective TTR stabilizer and inhibitor against TTR amyloid fibril formation. BBM rendered TTR more resistant to urea denaturation, similarly to iododiflunisal (IDIF), a very potent TTR stabilizer. BBM competes with thyroxine for binding in the TTR central channel, with an IC50 similar to IDIF and tafamidis. Results obtained by isothermal titration calorimetry (ITC) demonstrated that BBM binds TTR with an affinity similar to IDIF, tolcapone and tafamidis, confirming BBM as a potent binder of TTR. The crystal structure of the BBM-TTR complex shows two molecules binding deeply in the thyroxine binding channel, forming strong intermonomer hydrogen bonds and increasing the stability of the TTR tetramer. Finally, kinetic analysis of the ability of BBM to inhibit TTR fibrillogenesis at acidic pH and comparison with other stabilizers revealed that benzbromarone is a potent inhibitor of TTR amyloidogenesis, adding a new interesting scaffold for drug design of TTR stabilizers.
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Affiliation(s)
- Ellen Y. Cotrina
- Institut de Química Avançada de Catalunya (I.Q.A.C.-C.S.I.C.), 08034 Barcelona, Spain;
| | - Ângela Oliveira
- IBMC—Instituto de Biologia Molecular e Celular, 4200-135 Porto, Portugal; (Â.O.); (J.P.L.); (L.G.)
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
| | - José Pedro Leite
- IBMC—Instituto de Biologia Molecular e Celular, 4200-135 Porto, Portugal; (Â.O.); (J.P.L.); (L.G.)
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar (ICBAS), 4050-013 Porto, Portugal
| | - Jordi Llop
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 San Sebastian, Spain;
| | - Luis Gales
- IBMC—Instituto de Biologia Molecular e Celular, 4200-135 Porto, Portugal; (Â.O.); (J.P.L.); (L.G.)
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar (ICBAS), 4050-013 Porto, Portugal
| | - Jordi Quintana
- Research Programme on Biomedical Informatics, Universitat Pompeu Fabra (UPF-IMIM), 08003 Barcelona, Spain;
| | - Isabel Cardoso
- IBMC—Instituto de Biologia Molecular e Celular, 4200-135 Porto, Portugal; (Â.O.); (J.P.L.); (L.G.)
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar (ICBAS), 4050-013 Porto, Portugal
| | - Gemma Arsequell
- Institut de Química Avançada de Catalunya (I.Q.A.C.-C.S.I.C.), 08034 Barcelona, Spain;
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12
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Abstract
Abnormal aggregation of beta-amyloid (Aβ) peptide into amyloid plaques in the brain has been identified as one of the key factors in instigating AD pathogenesis. Inhibition of Aβ aggregation can be an important therapeutic strategy in disease management. In this work, we demonstrate the application of structure-based design of short peptides ('trojan peptides'), intended to intervene in the aggregation of the core recognition domain of amyloid-beta peptide, a known malefactor in Alzheimer's disease. The modulatory effect of trojan peptides has been assessed using ThT fluorescence assay, FETEM imaging, IR, and toxicity assays on model neuronal cell lines. Experimental results suggest that designed trojan peptides could impede the aggregation of the core amyloid fibril forming segment of Aβ peptide, arrest the formation of toxic fibrillar assemblies, and reduce cytotoxicity of the neuronal cell lines.
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Affiliation(s)
- Gaurav Pandey
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, -781039, India
| | - Sudhir Morla
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, -781039, India
| | - Sachin Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, -781039, India
| | - Vibin Ramakrishnan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, -781039, India.
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13
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Luo Z, Gao G, Ma Z, Liu Q, Gao X, Tang X, Gao Z, Li C, Sun T. Cichoric acid from witloof inhibit misfolding aggregation and fibrillation of hIAPP. Int J Biol Macromol 2020; 148:1272-1279. [PMID: 31759017 DOI: 10.1016/j.ijbiomac.2019.10.100] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/05/2019] [Accepted: 10/10/2019] [Indexed: 12/20/2022]
Abstract
The misfolding, aggregation and fibrillation of human islet amyloid polypeptide (hIAPP) has been acknowledged as a hallmark event in type-II diabetes. Hence, inhibiting the misfolding, aggregation and fibrillation of hIAPP have been accepted as a vital factor to treat the disease. Here cichoric acid was extracted from witloof to explore its inhibition effects on misfolding, aggregation and fibrillation of hIAPP. Thioflavin-T (ThT) fluorescence assay, dynamic light scattering (DLS) and atomic force microscopy (AFM) images showed that cichoric acid inhibited the aggregation and fibrillation of hIAPP in a dosage-dependent manner. Circular dichroism (CD) spectra showed that cichoric acid inhibited the misfolding of hIAPP from unfolded to β-sheet. Molecular docking and further experiments revealed interactions between hIAPP and cichoric acid. Cichoric acid could bind to K1 and R11 of hIAPP via electrostatic interaction. In addition, cichoric acid could form π-π stacking with hIAPP residues F15 and F23. These interactions inhibited the misfolding, aggregation and fibrillation of hIAPP. These results, together with cichoric acid's good cytocompatibility and significant protective effects in hIAPP lesioned cell models, not only showed that cichoric acid could be used to fight against amyloidosis, but also brought a new perspective for Chinese herbal medicine as natural compound's medical potential.
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Affiliation(s)
- Zhuoying Luo
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Guanbin Gao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
| | - Zhongjie Ma
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Qian Liu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Xiaobing Gao
- General Hospital of Central Theater Command, Wuhan 430070, China
| | - Xintong Tang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Zhenxing Gao
- Affiliated Cancer Hospital &Institute of Guangzhou Medical University, State Key Laboratory of Respiratory Diseases, Guangzhou 510000, China
| | - Chaoyang Li
- Affiliated Cancer Hospital &Institute of Guangzhou Medical University, State Key Laboratory of Respiratory Diseases, Guangzhou 510000, China.
| | - Taolei Sun
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China; School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China.
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14
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Liu W, Wang W, Dong X, Sun Y. Near-Infrared Light-Powered Janus Nanomotor Significantly Facilitates Inhibition of Amyloid-β Fibrillogenesis. ACS Appl Mater Interfaces 2020; 12:12618-12628. [PMID: 32105446 DOI: 10.1021/acsami.0c02342] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Inspired by the natural motors, artificial nanomotors (NMs) have emerged as intelligent, advanced, and multifunctional nanoplatforms that can perform complex tasks in living environments. However, the functionalization of these fantastic materials is in its infancy, hindering the success of this booming field. Herein, an inhibitor-conjugated near-infrared (NIR) laser-propelled Janus nanomotor (JNM-I) was constructed and first applied in the modulation of amyloid-β protein (Aβ) aggregation which is highly associated with Alzheimer's disease (AD). Under NIR light illumination, JNM-I exhibited efficient propulsion through the "self-thermophoresis" effect, and the active motion of JNM-I increased the opportunity of the contacts between the immobilized inhibitors and Aβ species, leading to an intensification of JNM-I on modulating the on-pathway Aβ aggregation, as evidenced by the distinct changes of the amyloid morphology, conformation, and cytotoxicity. For example, with a NIR irradiation, 200 μg/mL of JNM-I increased the cultured SH-SY5Y cell viability from 68% to nearly 100%, but it only protected the cells to 89% viability without an NIR irradiation. Meanwhile, the NIR irradiation effectively improved the blood-brain barrier (BBB) penetration of JNM-I. Such a JNM-I has connected artificial nanomotors with protein aggregation and provided new insight into the potential applications of various nanomotors in the prevention and treatment of AD.
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Affiliation(s)
- Wei Liu
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
| | - Wenjuan Wang
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
| | - Xiaoyan Dong
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
| | - Yan Sun
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
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15
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Armiento V, Spanopoulou A, Kapurniotu A. Peptide-Based Molecular Strategies To Interfere with Protein Misfolding, Aggregation, and Cell Degeneration. Angew Chem Int Ed Engl 2020; 59:3372-3384. [PMID: 31529602 PMCID: PMC7064928 DOI: 10.1002/anie.201906908] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Indexed: 12/31/2022]
Abstract
Protein misfolding into amyloid fibrils is linked to more than 40 as yet incurable cell- and neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, and type 2 diabetes. So far, however, only one of the numerous anti-amyloid molecules has reached patients. This Minireview gives an overview of molecular strategies and peptide chemistry "tools" to design, develop, and discover peptide-based molecules as anti-amyloid drug candidates. We focus on two major inhibitor rational design strategies: 1) the oldest and most common strategy, based on molecular recognition elements of amyloid self-assembly, and 2) a more recent approach, based on cross-amyloid interactions. We discuss why peptide-based amyloid inhibitors, in particular their advanced generations, can be promising leads or candidates for anti-amyloid drugs as well as valuable tools for deciphering amyloid-mediated cell damage and its link to disease pathogenesis.
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Affiliation(s)
- Valentina Armiento
- Division of Peptide BiochemistryTUM School of Life SciencesTechnische Universität MünchenEmil-Erlenmeyer-Forum 585354FreisingGermany
| | - Anna Spanopoulou
- Division of Peptide BiochemistryTUM School of Life SciencesTechnische Universität MünchenEmil-Erlenmeyer-Forum 585354FreisingGermany
- Current address: Coriolis Pharma Research GmbHFraunhoferstrasse 18B82152PlaneggGermany
| | - Aphrodite Kapurniotu
- Division of Peptide BiochemistryTUM School of Life SciencesTechnische Universität MünchenEmil-Erlenmeyer-Forum 585354FreisingGermany
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16
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Abstract
The aggregation of human islet amyloid polypeptides (hIAPP) to mature fibrils is considered as the main cause of type II diabetes. Therefore destroying the pre-formed hIAPP fibrils is expected to be a promising strategy for therapeutic treatments. In this work, the dissociation effects of graphene oxide (GO) nanosheets on hIAPP mature fibrils are investigated. The results clearly demonstrate that hIAPP fibrils can be quickly adsorbed on the GO surface and efficiently broken into short fragments. Meanwhile, the β-sheet structures of hIAPP fibrils are greatly destroyed. Particularly, in situ atomic force microscopy was applied to monitor the real-time interaction between hIAPP fibrils and GO nanosheets. It provides distinct evidence that the disruption of hIAPP fibrils by GO nanosheets mainly occurs at the GO edges. Size-dependent experiments further justify the interfere of edge contribution, which suggest small-sized GO nanosheets exhibit better dissociation ability than large-sized ones. Therefore, this study not only provides valuable information that GO nanosheets (especially small-sized ones) can act as efficient nanoblades to break hIAPP fibrils, but also suggests a powerful and widely available methodology for investigating real-time interaction between nanomaterials and biomolecules.
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Affiliation(s)
- Shujie Li
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, People's Republic of China. Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, People's Republic of China
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17
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Wang T, Zhang L, Wang J, Feng Y, Xu E, Mao X, Liu L. Evaluation of the photo-degradation of Alzheimer's amyloid fibrils with a label-free approach. Chem Commun (Camb) 2018; 54:13084-13087. [PMID: 30394470 PMCID: PMC6404227 DOI: 10.1039/c8cc07164k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Degradation of amyloid-β (Aβ) aggregates has been considered as an attractive therapeutic and preventive strategy against Alzheimer's disease (AD). However, an in situ, real-time, and label-free technique is still lacking to understand the degradation process of Aβ aggregates. In this work, we developed a novel method to quantitatively evaluate the degradation of Aβ fibrils by photoactive meso-tetra(4-sulfonatophenyl)porphyrin under UV irradiation with quartz crystal microbalance (QCM).
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Affiliation(s)
- Tianke Wang
- Institute for Advanced Materials, Jiangsu University, China.
| | - Liwei Zhang
- Institute for Advanced Materials, Jiangsu University, China.
| | - Jie Wang
- Institute for Advanced Materials, Jiangsu University, China.
| | - Yonghai Feng
- Institute for Advanced Materials, Jiangsu University, China.
| | - Enquan Xu
- Institute for Cell Engineering, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore,
| | - Xiaobo Mao
- Institute for Cell Engineering, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore,
| | - Lei Liu
- Institute for Advanced Materials, Jiangsu University, China.
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18
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Javed I, Yu T, Peng G, Sánchez-Ferrer A, Faridi A, Kakinen A, Zhao M, Mezzenga R, Davis TP, Lin S, Ke PC. In Vivo Mitigation of Amyloidogenesis through Functional-Pathogenic Double-Protein Coronae. Nano Lett 2018; 18:5797-5804. [PMID: 30088935 DOI: 10.1021/acs.nanolett.8b02446] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Amyloid diseases are global epidemics with no cure available. Herein, we report a first demonstration of in vivo mitigation of amyloidogenesis using biomimetic nanotechnology. Specifically, the amyloid fragments (ba) of β-lactoglobulin, a whey protein, were deposited onto the surfaces of carbon nanotubes (baCNT), which subsequently sequestered human islet amyloid polypeptide (IAPP) through functional-pathogenic double-protein coronae. Conformational changes at the ba-IAPP interface were studied by Fourier transform infrared, circular dichroism, and X-ray scattering spectroscopies. baCNT eliminated the toxic IAPP species from zebrafish embryos, as evidenced by the assays of embryonic development, cell morphology, hatching, and survival as well as suppression of oxidative stress. In addition to IAPP, baCNT also displayed high potency against the toxicity of amyloid-β, thereby demonstrating the broad applicability of this biomimetic nanotechnology and the use of an embryonic zebrafish model for the high-throughput screening of a range of amyloidogenesis and their inhibitors in vivo.
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Affiliation(s)
- Ibrahim Javed
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences , Monash University , 381 Royal Parade , Parkville , Victoria 3052 , Australia
- Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering , Tongji University , 1239 Siping Road , Shanghai 200092 , China
| | - Tianyu Yu
- Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering , Tongji University , 1239 Siping Road , Shanghai 200092 , China
| | - Guotao Peng
- Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering , Tongji University , 1239 Siping Road , Shanghai 200092 , China
| | - Antoni Sánchez-Ferrer
- Department of Health Sciences & Technology , ETH Zurich , Schmelzbergstrasse 9 , LFO, E23, 8092 Zurich , Switzerland
| | - Ava Faridi
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences , Monash University , 381 Royal Parade , Parkville , Victoria 3052 , Australia
| | - Aleksandr Kakinen
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences , Monash University , 381 Royal Parade , Parkville , Victoria 3052 , Australia
| | - Mei Zhao
- Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering , Tongji University , 1239 Siping Road , Shanghai 200092 , China
| | - Raffaele Mezzenga
- Department of Health Sciences & Technology , ETH Zurich , Schmelzbergstrasse 9 , LFO, E23, 8092 Zurich , Switzerland
| | - Thomas P Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences , Monash University , 381 Royal Parade , Parkville , Victoria 3052 , Australia
| | - Sijie Lin
- Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering , Tongji University , 1239 Siping Road , Shanghai 200092 , China
| | - Pu Chun Ke
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences , Monash University , 381 Royal Parade , Parkville , Victoria 3052 , Australia
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19
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Affiliation(s)
- Alberto Lleó
- Departamento de Neurología, Institut d'Investigacions Biomèdiques Sant Pau, Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, España.
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20
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Zaguri D, Kreiser T, Shaham-Niv S, Gazit E. Antibodies towards Tyrosine Amyloid-Like Fibrils Allow Toxicity Modulation and Cellular Imaging of the Assemblies. Molecules 2018; 23:E1273. [PMID: 29861432 PMCID: PMC6100058 DOI: 10.3390/molecules23061273] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 05/10/2018] [Accepted: 05/23/2018] [Indexed: 12/05/2022] Open
Abstract
The amino acid tyrosine forms cytotoxic amyloid-like fibrils by molecular self-assembly. However, the production of antibodies towards tyrosine assemblies, reflecting their presentation to the immune system, was not demonstrated yet. Here, we describe the production of antibodies that specifically recognize tyrosine in its fibrillated form. The antibodies were demonstrated to specifically bind self-assembled tyrosine, in contrast to its non-aggregated form or disintegrated fibrils. The antibodies could be used for immunostaining of tyrosine fibrils in cultured cells. Furthermore, confocal microscopy allowed a demonstration of the intracellular presence of the metabolite amyloids in a neuroblastoma cell model. Finally, pre-incubation of tyrosine fibrils with the antibodies resulted in significant reduction in their cytotoxicity. Taken together, we provide an experimental proof for the immunogenicity of tyrosine amyloid fibrillary assemblies. These specific antibodies against tyrosine structures could be further used as a research tool to study the dynamics, toxicity and cellular localization of the assemblies.
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Affiliation(s)
- Dor Zaguri
- Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel.
| | - Topaz Kreiser
- Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel.
| | - Shira Shaham-Niv
- Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel.
| | - Ehud Gazit
- Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel.
- Department of Materials Science and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 6997801, Israel.
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel.
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21
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Abstract
The self-assembly of insulin to form amyloid fibrils has been widely studied because it is a significant problem in the medical management of diabetes and is an important model system for the investigation of amyloid formation and its inhibition. A few inhibitors of insulin fibrillation have been identified with potencies that could be higher. Knowledge of how these work at the molecular level is not known but important for the development of more potent inhibitors. Here we show that rosmarinic acid completely inhibits amyloid formation by dimeric insulin at pH 2 and 60 °C. In contrast to other polyphenols, rosmarinic acid is soluble in water and does not degrade at elevated temperatures, and thus we were able to decipher the mechanism of inhibition by a combination of solution-state 1H NMR spectroscopy and molecular docking. On the basis of 1H chemical shift perturbations, intermolecular nuclear Overhauser effect enhancements between rosmarinic acid and specific residues of insulin, and slowed dynamics of rosmarinic acid in the presence of insulin, we show that rosmarinic acid binds to a pocket found on the surface of each insulin monomer. This results in the formation of a mixed tetramolecular aromatic network on the surface of insulin dimer, resulting in increased resistance of the amyloidogenic protein to thermal unfolding. This finding opens new avenues for the design of potent inhibitors of amyloid formation and provides strong experimental evidence for the role of surface aromatic clusters in increasing the thermal stability of proteins.
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Affiliation(s)
- Qiuchen Zheng
- Carlson School of Chemistry and Biochemistry, Clark University , 950 Main Street, Worcester, Massachusetts 01610, United States
| | - Noel D Lazo
- Carlson School of Chemistry and Biochemistry, Clark University , 950 Main Street, Worcester, Massachusetts 01610, United States
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22
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Pretorius E, Page MJ, Mbotwe S, Kell DB. Lipopolysaccharide-binding protein (LBP) can reverse the amyloid state of fibrin seen or induced in Parkinson's disease. PLoS One 2018; 13:e0192121. [PMID: 29494603 PMCID: PMC5832207 DOI: 10.1371/journal.pone.0192121] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 01/18/2018] [Indexed: 01/13/2023] Open
Abstract
The thrombin-induced polymerisation of fibrinogen to form fibrin is well established as a late stage of blood clotting. It is known that Parkinson's Disease (PD) is accompanied by dysregulation in blood clotting, but it is less widely known as a coagulopathy. In recent work, we showed that the presence of tiny amounts of bacterial lipopolysaccharide (LPS) in healthy individuals could cause clots to adopt an amyloid form, and this could be observed via scanning electron microscopy (SEM) or via the fluorescence of thioflavin-T. This could be prevented by the prior addition of lipopolysaccharide-binding protein (LBP). We had also observed by SEM this unusual clotting in the blood of patients with Parkinson's Disease. We hypothesised, and here show, that this too can be prevented by LBP in the context of PD. This adds further evidence implicating inflammatory microbial cell wall products as an accompaniment to the disease, and may be part of its aetiology. This may lead to novel treatment strategies in PD designed to target microbes and their products.
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Affiliation(s)
- Etheresia Pretorius
- Department of Physiological Sciences, Faculty of Science, Stellenbosch University, Stellenbosch, South Africa
| | - Martin J. Page
- Department of Physiological Sciences, Faculty of Science, Stellenbosch University, Stellenbosch, South Africa
| | - Sthembile Mbotwe
- Department of Physiology, Faculty of Health Sciences, University of Pretoria, Arcadia, South Africa
| | - Douglas B. Kell
- Department of Physiological Sciences, Faculty of Science, Stellenbosch University, Stellenbosch, South Africa
- School of Chemistry, The University of Manchester, Manchester, Lancs, United Kingdom
- The Manchester Institute of Biotechnology, The University of Manchester, Manchester, Lancs, United Kingdom
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23
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Wang S, Peng X, Cui L, Li T, Yu B, Ma G, Ba X. Synthesis of water-soluble curcumin derivatives and their inhibition on lysozyme amyloid fibrillation. Spectrochim Acta A Mol Biomol Spectrosc 2018; 190:89-95. [PMID: 28915469 DOI: 10.1016/j.saa.2017.09.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 08/14/2017] [Accepted: 09/07/2017] [Indexed: 06/07/2023]
Abstract
The potential application of curcumin was heavily limited in biomedicine because of its poor solubility in pure water. To circumvent the detracting feature, two novel water-soluble amino acid modified curcumin derivatives (MLC and DLC) have been synthesized through the condensation reaction between curcumin and Nα-Fmoc-Nε-Boc-l-lysine. Benefiting from the enhanced solubility of 3.32×10-2g/mL for MLC and 4.66×10-2g/mL for DLC, the inhibition effects of the as-prepared derivatives on the amyloid fibrillation of lysozyme (HEWL) were investigated detaily in water solution. The obtained results showed that the amyloid fibrillation of HEWL was inhibited to a great extent when the concentrations of MLC and DLC reach to 20.139mM and 49.622mM, respectively. The fluorescence quenching upon the addition of curcumin to HEWL provide a support for static and dynamic recombination quenching process. The binding driving force was assigned to classical hydrophobic interaction between curcumin derivatives and HEWL. In addition, UV-Vis absorption and circular dichroism (CD) spectra confirmed the change of the conformation of HEWL.
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Affiliation(s)
- Sujuan Wang
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Xixi Peng
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Liangliang Cui
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Tongtong Li
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Bei Yu
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Gang Ma
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China; Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, China.
| | - Xinwu Ba
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China.
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24
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Jain N, Ådén J, Nagamatsu K, Evans ML, Li X, McMichael B, Ivanova MI, Almqvist F, Buxbaum JN, Chapman MR. Inhibition of curli assembly and Escherichia coli biofilm formation by the human systemic amyloid precursor transthyretin. Proc Natl Acad Sci U S A 2017; 114:12184-12189. [PMID: 29087319 PMCID: PMC5699053 DOI: 10.1073/pnas.1708805114] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
During biofilm formation, Escherichia coli and other Enterobacteriaceae produce an extracellular matrix consisting of curli amyloid fibers and cellulose. The precursor of curli fibers is the amyloidogenic protein CsgA. The human systemic amyloid precursor protein transthyretin (TTR) is known to inhibit amyloid-β (Aβ) aggregation in vitro and suppress the Alzheimer's-like phenotypes in a transgenic mouse model of Aβ deposition. We hypothesized that TTR might have broad antiamyloid activity because the biophysical properties of amyloids are largely conserved across species and kingdoms. Here, we report that both human WT tetrameric TTR (WT-TTR) and its engineered nontetramer-forming monomer (M-TTR, F87M/L110M) inhibit CsgA amyloid formation in vitro, with M-TTR being the more efficient inhibitor. Preincubation of WT-TTR with small molecules that occupy the T4 binding site eliminated the inhibitory capacity of the tetramer; however, they did not significantly compromise the ability of M-TTR to inhibit CsgA amyloidogenesis. TTR also inhibited amyloid-dependent biofilm formation in two different bacterial species with no apparent bactericidal or bacteriostatic effects. These discoveries suggest that TTR is an effective antibiofilm agent that could potentiate antibiotic efficacy in infections associated with significant biofilm formation.
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Affiliation(s)
- Neha Jain
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109-1048
| | - Jörgen Ådén
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | - Kanna Nagamatsu
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109-1048
| | - Margery L Evans
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109-1048
| | - Xinyi Li
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037
| | - Brennan McMichael
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109-1048
| | - Magdalena I Ivanova
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109-1048
- Program of Biophysics, University of Michigan, Ann Arbor, MI 48109-1048
| | | | - Joel N Buxbaum
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037;
| | - Matthew R Chapman
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109-1048;
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25
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Kalhor HR, Ashrafian H. Identification of an aspidospermine derivative from borage extract as an anti-amyloid compound: A possible link between protein aggregation and antimalarial drugs. Phytochemistry 2017; 140:134-140. [PMID: 28499255 DOI: 10.1016/j.phytochem.2017.05.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 05/02/2017] [Accepted: 05/04/2017] [Indexed: 06/07/2023]
Abstract
A number of human diseases, including Alzheimer's and Parkinson's have been linked to amyloid formation. To search for an anti-amyloidogenic product, alkaloid enriched extract from borage leaves was examined for anti-amyloidogenic activity using Hen Egg White Lysozyme (HEWL) as a model protein. After isolation of the plant extract using rHPLC, only one fraction indicated a significant bioactivity. TEM analysis confirmed a remarkable reduction of amyloid fibrils in the presence of the bioactive fraction. To identify the effective substance in the fraction, mass spectrometry, FTIR, and NMR were performed. Our analyses determined that the bioactive compound as 1-acetyl-19,21-epoxy-15,16-dimethoxyaspidospermidine-17-ol, a derivative of aspidospermine. To investigate the mechanism of the inhibition, ANS binding, intrinsic fluorescence, and amide I content were performed in the presence of the bioactive compound. All the results confirmed the role of the compound in assisting the proper folding of the protein. In addition, molecular docking indicated the aspidospermine derivative binds the amyloidogenic region of the protein. Our results show that the alkaloid extracted from borage leaves reduces protein aggregation mediating through structural elements of the protein, promoting the correct folding of lysozyme. Since a number of aspidospermine compounds have been shown to possess potent antimalarial activities, the action of compound identified in the present study suggests a possible link between protein aggregation and aspidospermine drugs.
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Affiliation(s)
- Hamid R Kalhor
- Biochemistry Research Laboratory, Department of Chemistry, Sharif University of Technology, Tehran, Iran.
| | - Hossein Ashrafian
- Biochemistry Research Laboratory, Department of Chemistry, Sharif University of Technology, Tehran, Iran
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26
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Park YJ, Warnock GL, Ao Z, Safikhan N, Meloche M, Asadi A, Kieffer TJ, Marzban L. Dual role of interleukin-1β in islet amyloid formation and its β-cell toxicity: Implications for type 2 diabetes and islet transplantation. Diabetes Obes Metab 2017; 19:682-694. [PMID: 28058779 DOI: 10.1111/dom.12873] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 12/21/2016] [Accepted: 01/03/2017] [Indexed: 01/18/2023]
Abstract
AIMS Islet amyloid, formed by aggregation of human islet amyloid polypeptide (hIAPP), contributes to β-cell failure in type 2 diabetes, cultured and transplanted islets. We previously showed that biosynthetic hIAPP aggregates induce β-cell Fas upregulation and activation of the Fas apoptotic pathway. We used cultured human and hIAPP-expressing mouse islets to investigate: (1) the role of interleukin-1β (IL-1β) in amyloid-induced Fas upregulation; and (2) the effects of IL-1β-induced β-cell dysfunction on pro-islet amyloid polypeptide (proIAPP) processing and amyloid formation. RESEARCH DESIGN AND METHODS Human and h IAPP -expressing mouse islets were cultured to form amyloid without or with the IL-1 receptor antagonist (IL-1Ra) anakinra, in the presence or absence of recombinant IL-1β. Human islets in which amyloid formation was prevented (amyloid inhibitor or Ad-prohIAPP-siRNA) were cultured similarly. β-cell function, apoptosis, Fas expression, caspase-8 activation, islet IL-1β, β-cell area, β-/α-cell ratio, amyloid formation, and (pro)IAPP forms were assessed. RESULTS hIAPP aggregates were found to increase IL-1β levels in cultured human islets that correlated with β-cell Fas upregulation, caspase-8 activation and apoptosis, all of which were reduced by IL-1Ra treatment or prevention of amyloid formation. Moreover, IL-1Ra improved culture-induced β-cell dysfunction and restored impaired proIAPP processing, leading to lower amyloid formation. IL-1β treatment potentiated impaired proIAPP processing and increased amyloid formation in cultured human and h IAPP -expressing mouse islets, which were prevented by IL-1Ra. CONCLUSIONS IL-1β plays a dual role by: (1) mediating amyloid-induced Fas upregulation and β-cell apoptosis; (2) inducing impaired proIAPP processing thereby potentiating amyloid formation. Blocking IL-1β may provide a new strategy to preserve β cells in conditions associated with islet amyloid formation.
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Affiliation(s)
- Yoo Jin Park
- Department of Surgery, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Garth L Warnock
- Department of Surgery, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Ziliang Ao
- Department of Surgery, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Nooshin Safikhan
- Department of Surgery, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Mark Meloche
- Department of Surgery, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Ali Asadi
- Department of Cellular and Physiological Sciences, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Timothy J Kieffer
- Department of Surgery, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Cellular and Physiological Sciences, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Lucy Marzban
- Department of Surgery, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
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27
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Ratha BN, Ghosh A, Brender JR, Gayen N, Ilyas H, Neeraja C, Das KP, Mandal AK, Bhunia A. Inhibition of Insulin Amyloid Fibrillation by a Novel Amphipathic Heptapeptide: MECHANISTIC DETAILS STUDIED BY SPECTROSCOPY IN COMBINATION WITH MICROSCOPY. J Biol Chem 2016; 291:23545-23556. [PMID: 27679488 PMCID: PMC5095409 DOI: 10.1074/jbc.m116.742460] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 09/24/2016] [Indexed: 02/02/2023] Open
Abstract
The aggregation of insulin into amyloid fibers has been a limiting factor in the development of fast acting insulin analogues, creating a demand for excipients that limit aggregation. Despite the potential demand, inhibitors specifically targeting insulin have been few in number. Here we report a non-toxic and serum stable-designed heptapeptide, KR7 (KPWWPRR-NH2), that differs significantly from the primarily hydrophobic sequences that have been previously used to interfere with insulin amyloid fibrillation. Thioflavin T fluorescence assays, circular dichroism spectroscopy, and one-dimensional proton NMR experiments suggest KR7 primarily targets the fiber elongation step with little effect on the early oligomerization steps in the lag time period. From confocal fluorescence and atomic force microscopy experiments, the net result appears to be the arrest of aggregation in an early, non-fibrillar aggregation stage. This mechanism is noticeably different from previous peptide-based inhibitors, which have primarily shifted the lag time with little effect on later stages of aggregation. As insulin is an important model system for understanding protein aggregation, the new peptide may be an important tool for understanding peptide-based inhibition of amyloid formation.
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Affiliation(s)
| | | | - Jeffrey R Brender
- Radiation Biology Branch, National Institutes of Health, Bethesda, Maryland 20814
| | - Nilanjan Gayen
- Department of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
| | | | - Chilukoti Neeraja
- TIFR Centre for Interdisciplinary Sciences (TCIS), Narsingi, Hyderabad 500075, India, and
| | - Kali P Das
- Department of Chemistry, 93/1 APC Road, Bose Institute, Kolkata 700009, India
| | - Atin K Mandal
- Department of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
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28
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Arai T, Ohno A, Mori K, Kuwata H, Mizuno M, Imai K, Hara S, Shibanuma M, Kurihara M, Miyata N, Nakagawa H, Fukuhara K. Inhibition of amyloid fibril formation and cytotoxicity by caffeic acid-conjugated amyloid-β C-terminal peptides. Bioorg Med Chem Lett 2016; 26:5468-5471. [PMID: 27789140 DOI: 10.1016/j.bmcl.2016.10.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 10/07/2016] [Accepted: 10/11/2016] [Indexed: 11/16/2022]
Abstract
Amyloid-β (Aβ) deposition and oxidative stress observed in the brains of patients with Alzheimer's disease (AD) are important targets for therapeutic intervention. In this study, we conjugated the antioxidants caffeic acid (CA) and dihydrocaffeic acid (DHCA) to Aβ1-42 C-terminal motifs (Aβx-42: x=38, 40) to synthesize CA-Aβx-42 and DHCA-Aβx-42, respectively. Among the compounds, CA-Aβ38-42 exhibited potent inhibitory activity against Aβ1-42 aggregation and scavenged Aβ1-42-induced intracellular oxidative stress. Moreover, CA-Aβ38-42 significantly protected human neuroblastoma SH-SY5Y cells against Aβ1-42-induced cytotoxicity, with an IC50 of 4μM. These results suggest that CA-Aβ38-42 might be a potential lead for the treatment of AD.
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Affiliation(s)
- Takuya Arai
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, Aichi 467-8603, Japan; School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Akiko Ohno
- Division of Organic Chemistry, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Kazunori Mori
- School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Hiroshi Kuwata
- School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Mirei Mizuno
- School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Kohei Imai
- School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Shuntaro Hara
- School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Motoko Shibanuma
- School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Masaaki Kurihara
- Division of Organic Chemistry, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Naoki Miyata
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, Aichi 467-8603, Japan
| | - Hidehiko Nakagawa
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, Aichi 467-8603, Japan
| | - Kiyoshi Fukuhara
- School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan.
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29
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Asp E, Proschitsky M, Krishnan R. Remodeling Amyloid Fibers: Baker's Yeast Shows Us the Way. ACTA ACUST UNITED AC 2016; 22:979-81. [PMID: 26295834 DOI: 10.1016/j.chembiol.2015.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Proteopathies are a large and diverse group of human diseases that are caused by protein misfolding. Well-known examples of proteopathies are Alzheimer's and Parkinson's disease, which are both linked to amyloid fibril formation. In this issue of Chemistry & Biology, Castellano et al. (2015) describe the way to harness the power of a protein from baker's yeast, Hsp104, to disaggregate the fibrils.
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Affiliation(s)
- Eva Asp
- Neurophage Pharmaceuticals, 222 Third Street, Suite 3120, Cambridge, MA 02142, USA
| | - Ming Proschitsky
- Neurophage Pharmaceuticals, 222 Third Street, Suite 3120, Cambridge, MA 02142, USA
| | - Rajaraman Krishnan
- Neurophage Pharmaceuticals, 222 Third Street, Suite 3120, Cambridge, MA 02142, USA.
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30
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Shimada H. [Significance and progress of DIAN/A4/API]. Nihon Rinsho 2016; 74:417-422. [PMID: 27025079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The DIAN observational study compared the pathophysiological markers between mutation carriers and non-carriers for autosomal dominant Alzheimer's disease. It has revealed the biomarker changes in the mutation carrier's brain started as early as 20, even 25 years prior to symptoms. The researchers of DIAN started the prevention trial(DIAN-TU) with two monoclonal antibodies. The API study is the clinical trial of the anti-amyloid monoclonal antibody therapy to the kindred of early onset familial AD (EOAD) who carry the PSEN1 E280A mutation. This study has also shown the same biomarker changes that were reported in the DIAN study. Anti-Amyloid Treatment in Asymptomatic AD (A4) is a prevention trial aimed at treating cognitive normal older individuals at risk of developing Alzheimer's disease dementia on the basis of having biomarker evidence of amyloid (pre-clinical AD). Solanezumab was selected for the anti-amyloid treatment for A4.
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31
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Arai H, Furukawa K, Tomita N, Ishiki A, Okamura N, Kudo Y. [The trend of developing new disease-modifying drugs in Alzheimer's disease]. Nihon Rinsho 2016; 74:411-416. [PMID: 27025078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Development of symptomatic treatment of Alzheimer s disease by cholinesterase inhibitors like donepezil was successful. However, it is a disappointment that development of disease-modifying drugs such as anti-amyloid drug based on amyloid-cascade theory has been interrupted or unsuccessful. Therefore, we have to be more cautious regarding inclusion criteria for clinical trials of new drugs. We agree that potentially curative drugs should be started before symptoms begin as a preemptive therapy or prevention trial. The concept of personalized medicine also is important when ApoE4-related amyloid reducing therapy is considered. Unfortunately, Japanese-ADNI has suffered a setback since 2014. However, Ministry of Health, Labour and Welfare gave a final remark that there was nothing wrong in the data managing process in the J-ADNI data center. We should pay more attention to worldwide challenges of speeding up new drug development.
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32
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Yamakawa MY, Uchino K, Watanabe Y, Adachi T, Nakanishi M, Ichino H, Hongo K, Mizobata T, Kobayashi S, Nakashima K, Kawata Y. Anthocyanin suppresses the toxicity of Aβ deposits through diversion of molecular forms in in vitro and in vivo models of Alzheimer's disease. Nutr Neurosci 2015; 19:32-42. [PMID: 26304685 DOI: 10.1179/1476830515y.0000000042] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
OBJECTIVES The pathogenesis of Alzheimer's disease (AD) is strongly correlated with the aggregation and deposition of the amyloid beta (Aβ1-42) peptide in fibrillar form, and many studies have shown that plant-derived polyphenols are capable of attenuating AD progression in various disease models. In this study, we set out to correlate the effects of anthocyanoside extracts (Vaccinium myrtillus anthocyanoside (VMA)) obtained from bilberry on the in vitro progression of Aβ fibril formation with the in vivo effects of this compound on AD pathogenesis. METHODS Thioflavin T fluorescence assays and atomic force microscopy were used to monitor Aβ amyloid formation in in vitro assays. Effects of Aβ amyloids on cellular viability were assayed using cultured Neuro2a cells. Cognitive effects were probed using mice that simultaneously expressed mutant human Aβ precursor and mutant presenilin-2. RESULTS Addition of VMA inhibited the in vitro formation of Aβ peptide fibrils and also reduced the toxicity of these aggregates toward Neuro2a cells. A diet containing 1% VMA prevented the cognitive degeneration in AD mice. Curiously, this diet-derived retention of cognitive ability was not accompanied by a reduction in aggregate deposition in brains; rather, an increase in insoluble deposits was observed compared with mice raised on a control diet. DISCUSSION The paradoxical increase in insoluble deposits caused by VMA suggests that these polyphenols divert Aβ aggregation to an alternate, non-toxic form. This finding underscores the complex effects that polyphenol compounds may exert on amyloid deposition in vivo.
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33
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Xiong N, Dong XY, Zheng J, Liu FF, Sun Y. Design of LVFFARK and LVFFARK-functionalized nanoparticles for inhibiting amyloid β-protein fibrillation and cytotoxicity. ACS Appl Mater Interfaces 2015; 7:5650-5662. [PMID: 25700145 DOI: 10.1021/acsami.5b00915] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Aggregation of amyloid β-protein (Aβ) into amyloid oligomers and fibrils is pathologically linked to Alzheimer's disease (AD). Hence, the inhibition of Aβ aggregation is essential for the prevention and treatment of AD, but the development of potent agents capable of inhibiting Aβ fibrillogenesis has posed significant challenges. Herein, we designed Ac-LVFFARK-NH2 (LK7) by incorporating two positively charged residues, R and K, into the central hydrophobic fragment of Aβ17-21 (LVFFA) and examined its inhibitory effect on Aβ42 aggregation and cytotoxicity by extensive physical, biophysical, and biological analyses. LK7 was observed to inhibit Aβ42 fibrillogenesis in a dose-dependent manner, but its strong self-assembly characteristic also resulted in high cytotoxicity. In order to prevent the cytotoxicity that resulted from the self-assembly of LK7, the peptide was then conjugated to the surface of poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) to fabricate a nanosized inhibitor, LK7@PLGA-NPs. It was found that LK7@PLGA-NPs had little cytotoxicity because the self-assembly of the LK7 conjugated on the NPs was completely inhibited. Moreover, the NPs-based inhibitor showed remarkable inhibitory capability against Aβ42 aggregation and significantly alleviated its cytotoxicity at a low LK7@PLGA-NPs concentration of 20 μg/mL. At the same peptide concentration, free LK7 showed little inhibitory effect. It is considered that several synergetic effects contributed to the strong inhibitory ability of LK7@PLGA-NPs, including the enhanced interactions between Aβ42 and LK7@PLGA-NPs brought on by inhibiting LK7 self-assembly, restricting conformational changes of Aβ42, and thus redirecting Aβ42 aggregation into unstructured, off-pathway aggregates. The working mechanisms of the inhibitory effects of LK7 and LK7@PLGA-NPs on Aβ42 aggregation were proposed based on experimental observations. This work provides new insights into the design and development of potent NPs-based inhibitors against Aβ aggregation and cytotoxicity.
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Affiliation(s)
- Neng Xiong
- †Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Xiao-Yan Dong
- †Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Jie Zheng
- ‡Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Fu-Feng Liu
- †Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Yan Sun
- †Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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Wang N, He J, Chang AK, Wang Y, Xu L, Chong X, Lu X, Sun Y, Xia X, Li H, Zhang B, Song Y, Kato A, Jones GW. (-)-epigallocatechin-3-gallate inhibits fibrillogenesis of chicken cystatin. J Agric Food Chem 2015; 63:1347-1351. [PMID: 25620201 DOI: 10.1021/jf505277e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Previous studies have reported that (-)-epigallocatechin-3-gallate (EGCG), the most abundant flavonoid in green tea, can bind to unfolded native polypeptides and prevent conversion to amyloid fibrils. To elucidate whether this antifibril activity is specific to disease-related target proteins or is more generic, we investigated the ability of EGCG to inhibit amyloid fibril formation of amyloidogenic mutant chicken cystatin I66Q, a generic amyloid-forming model protein that undergoes fibril formation through a domain swapping mechanism. We demonstrated that EGCG was a potent inhibitor of amyloidogenic cystatin I66Q amyloid fibril formation in vitro. Computational analysis suggested that EGCG prevented amyloidogenic cystatin fibril formation by stabilizing the molecule in its native-like state as opposed to redirecting aggregation toward disordered and amorphous aggregates. Therefore, although EGCG appears to be a generic inhibitor of amyloid-fibril formation, the mechanism by which it achieves such inhibition may be specific to the target fibril-forming polypeptide.
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Affiliation(s)
- Na Wang
- Province Key Laboratory of Animal Resource and Epidemic Disease Prevention, School of Life Science, Liaoning University , Shenyang 110036, China
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Liu Y, Graetz M, Ho L, Pukala TL. Ion mobility-mass spectrometry-based screening for inhibition of α- synuclein aggregation. Eur J Mass Spectrom (Chichester) 2015; 21:255-264. [PMID: 26307705 DOI: 10.1255/ejms.1359] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Aberrant protein folding and formation of amyloid fibrils are associated with numerous debilitating human diseases, for which there are currently no suitable therapeutic treatments. For instance, Parkinson's disease is characterised pathologically by the intraneural accumulation of the amyloid protein α- synuclein. In order to search for new therapeutic agents that are effective in preventing the early conformational changes that precede protein aggregation, it is necessary to devise new analytical screening approaches. Here we demonstrate the use of ion mobility-mass spectrometry for screening of molecules capable of inhibiting the misfolding and aggregation of α-synuclein (specifically, the A53T human mutant). Importantly, this assay allows for the analysis of conformational changes that precede aggregation, and therefore is unique in its ability to identify inhibitors working at the earliest stages of amyloid formation. In addition, we use complementary mass spectrometry methods to probe selected protein-ligand interactions responsible for fibril inhibition.
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Affiliation(s)
- Yanqin Liu
- Discipline of Chemistry, University of Adelaide, SA, 5005, Australia.
| | - Michael Graetz
- Discipline of Chemistry, University of Adelaide, SA, 5005, Australia.
| | - Lam Ho
- Discipline of Chemistry, University of Adelaide, SA, 5005, Australia.
| | - Tara L Pukala
- Dis cipline of Chemistry, University of Adelaide, SA, 5005, Australia.
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Susa AC, Wu C, Bernstein SL, Dupuis NF, Wang H, Raleigh DP, Shea JE, Bowers MT. Defining the molecular basis of amyloid inhibitors: human islet amyloid polypeptide-insulin interactions. J Am Chem Soc 2014; 136:12912-9. [PMID: 25144879 PMCID: PMC4183647 DOI: 10.1021/ja504031d] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Indexed: 11/28/2022]
Abstract
Human islet amyloid polypeptide (hIAPP or Amylin) is a 37 residue hormone that is cosecreted with insulin from the pancreatic islets. The aggregation of hIAPP plays a role in the progression of type 2 diabetes and contributes to the failure of islet cell grafts. Despite considerable effort, little is known about the mode of action of IAPP amyloid inhibitors, and this has limited rational drug design. Insulin is one of the most potent inhibitors of hIAPP fibril formation, but its inhibition mechanism is not understood. In this study, the aggregation of mixtures of hIAPP with insulin, as well as with the separate A and B chains of insulin, were characterized using ion mobility spectrometry-based mass spectrometry and atomic force microscopy. Insulin and the insulin B chain target the hIAPP monomer in its compact isoform and shift the equilibrium away from its extended isoform, an aggregation-prone conformation, and thus inhibit hIAPP from forming β-sheets and subsequently amyloid fibrils. All-atom molecular modeling supports these conclusions.
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Affiliation(s)
- Anna C. Susa
- Department
of Chemistry and Biochemistry, University
of California, Santa Barbara, California 93106, United States
| | - Chun Wu
- Department
of Chemistry and Biochemistry, University
of California, Santa Barbara, California 93106, United States
| | - Summer L. Bernstein
- Department
of Chemistry and Biochemistry, University
of California, Santa Barbara, California 93106, United States
| | - Nicholas F. Dupuis
- Department
of Chemistry and Biochemistry, University
of California, Santa Barbara, California 93106, United States
| | - Hui Wang
- Department
of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
| | - Daniel P. Raleigh
- Department
of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
| | - Joan-Emma Shea
- Department
of Chemistry and Biochemistry, University
of California, Santa Barbara, California 93106, United States
| | - Michael T. Bowers
- Department
of Chemistry and Biochemistry, University
of California, Santa Barbara, California 93106, United States
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Wu JW, Liu KN, How SC, Chen WA, Lai CM, Liu HS, Hu CJ, Wang SSS. Carnosine's effect on amyloid fibril formation and induced cytotoxicity of lysozyme. PLoS One 2013; 8:e81982. [PMID: 24349167 PMCID: PMC3859581 DOI: 10.1371/journal.pone.0081982] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Accepted: 10/20/2013] [Indexed: 11/23/2022] Open
Abstract
Carnosine, a common dipeptide in mammals, has previously been shown to dissemble alpha-crystallin amyloid fibrils. To date, the dipeptide's anti-fibrillogensis effect has not been thoroughly characterized in other proteins. For a more complete understanding of carnosine's mechanism of action in amyloid fibril inhibition, we have investigated the effect of the dipeptide on lysozyme fibril formation and induced cytotoxicity in human neuroblastoma SH-SY5Y cells. Our study demonstrates a positive correlation between the concentration and inhibitory effect of carnosine against lysozyme fibril formation. Molecular docking results show carnosine's mechanism of fibrillogenesis inhibition may be initiated by binding with the aggregation-prone region of the protein. The dipeptide attenuates the amyloid fibril-induced cytotoxicity of human neuronal cells by reducing both apoptotic and necrotic cell deaths. Our study provides solid support for carnosine's amyloid fibril inhibitory property and its effect against fibril-induced cytotoxicity in SH-SY5Y cells. The additional insights gained herein may pave way to the discovery of other small molecules that may exert similar effects against amyloid fibril formation and its associated neurodegenerative diseases.
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Affiliation(s)
- Josephine W. Wu
- Department of Optometry, Central Taiwan University of Science and Technology, Taichung, Taiwan,
- * E-mail: (JWW); (SSSW)
| | - Kuan-Nan Liu
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Su-Chun How
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Wei-An Chen
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Chia-Min Lai
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Hwai-Shen Liu
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Chaur-Jong Hu
- Department of Neurology, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Steven S. -S. Wang
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
- * E-mail: (JWW); (SSSW)
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De Genst E, Chan PH, Pardon E, Hsu STD, Kumita JR, Christodoulou J, Menzer L, Chirgadze DY, Robinson CV, Muyldermans S, Matagne A, Wyns L, Dobson CM, Dumoulin M. A nanobody binding to non-amyloidogenic regions of the protein human lysozyme enhances partial unfolding but inhibits amyloid fibril formation. J Phys Chem B 2013; 117:13245-13258. [PMID: 23919586 PMCID: PMC4612432 DOI: 10.1021/jp403425z] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report the effects of the interaction of two camelid antibody fragments, generally called nanobodies, namely cAb-HuL5 and a stabilized and more aggregation-resistant variant cAb-HuL5G obtained by protein engineering, on the properties of two amyloidogenic variants of human lysozyme, I56T and D67H, whose deposition in vital organs including the liver, kidney, and spleen is associated with a familial non-neuropathic systemic amyloidosis. Both NMR spectroscopy and X-ray crystallographic studies reveal that cAb-HuL5 binds to the α-domain, one of the two lobes of the native lysozyme structure. The binding of cAb-HuL5/cAb-HuL5G strongly inhibits fibril formation by the amyloidogenic variants; it does not, however, suppress the locally transient cooperative unfolding transitions, characteristic of these variants, in which the β-domain and the C-helix unfold and which represents key early intermediate species in the formation of amyloid fibrils. Therefore, unlike two other nanobodies previously described, cAb-HuL5/cAb-HuL5G does not inhibit fibril formation via the restoration of the global cooperativity of the native structure of the lysozyme variants to that characteristic of the wild-type protein. Instead, it inhibits a subsequent step in the assembly of the fibrils, involving the unfolding and structural reorganization of the α-domain. These results show that nanobodies can protect against the formation of pathogenic aggregates at different stages in the structural transition of a protein from the soluble native state into amyloid fibrils, illustrating their value as structural probes to study the molecular mechanisms of amyloid fibril formation. Combined with their amenability to protein engineering techniques to improve their stability and solubility, these findings support the suggestion that nanobodies can potentially be developed as therapeutics to combat protein misfolding diseases.
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Affiliation(s)
- Erwin De Genst
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Pak-Ho Chan
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
- State Key Laboratory of Chirosciences, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P.R. China
| | - Els Pardon
- Department of Structural Biology, Vlaams Interuniversitair Instituut voor Biotechnologie VIB, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
- Laboratory of Structural Biology Brussels, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Shang-Te D. Hsu
- Institute of Bioinformatics and Structural Biology, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
- Institute of Biological Chemistry, Academia Sinica, No 128, Section 2, Academia Road, Taipei 11529, Taiwan
- Institute of Biochemical Sciences, National Taiwan University, No 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Janet R. Kumita
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - John Christodoulou
- Institute of Structural and Molecular Biology, University College London and Birkbeck College, Gower Street, London WC1E 6BT, U.K
| | - Linda Menzer
- Laboratory of Enzymology and Protein Folding, Centre for Protein Engineering, Institute of Chemistry, University of Liege, B-4000 Liege (Sart Tilman), Belgium
| | - Dimitri Y. Chirgadze
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, U.K
| | - Carol V. Robinson
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3QZ, U.K
| | - Serge Muyldermans
- Department of Structural Biology, Vlaams Interuniversitair Instituut voor Biotechnologie VIB, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
- Research Unit of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - André Matagne
- Laboratory of Enzymology and Protein Folding, Centre for Protein Engineering, Institute of Chemistry, University of Liege, B-4000 Liege (Sart Tilman), Belgium
| | - Lode Wyns
- Department of Structural Biology, Vlaams Interuniversitair Instituut voor Biotechnologie VIB, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
- Laboratory of Structural Biology Brussels, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Christopher M. Dobson
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Mireille Dumoulin
- Laboratory of Enzymology and Protein Folding, Centre for Protein Engineering, Institute of Chemistry, University of Liege, B-4000 Liege (Sart Tilman), Belgium
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Sato M, Murakami K, Uno M, Nakagawa Y, Katayama S, Akagi KI, Masuda Y, Takegoshi K, Irie K. Site-specific inhibitory mechanism for amyloid β42 aggregation by catechol-type flavonoids targeting the Lys residues. J Biol Chem 2013; 288:23212-24. [PMID: 23792961 PMCID: PMC3743493 DOI: 10.1074/jbc.m113.464222] [Citation(s) in RCA: 175] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 06/15/2013] [Indexed: 11/06/2022] Open
Abstract
The aggregation of the 42-residue amyloid β-protein (Aβ42) is involved in the pathogenesis of Alzheimer disease (AD). Numerous flavonoids exhibit inhibitory activity against Aβ42 aggregation, but their mechanism remains unclear in the molecular level. Here we propose the site-specific inhibitory mechanism of (+)-taxifolin, a catechol-type flavonoid, whose 3',4'-dihydroxyl groups of the B-ring plays a critical role. Addition of sodium periodate, an oxidant, strengthened suppression of Aβ42 aggregation by (+)-taxifolin, whereas no inhibition was observed under anaerobic conditions, suggesting the inhibition to be associated with the oxidation to form o-quinone. Because formation of the Aβ42-taxifolin adduct was suggested by mass spectrometry, Aβ42 mutants substituted at Arg(5), Lys(16), and/or Lys(28) with norleucine (Nle) were prepared to identify the residues involved in the conjugate formation. (+)-Taxifolin did not suppress the aggregation of Aβ42 mutants at Lys(16) and/or Lys(28) except for the mutant at Arg(5). In addition, the aggregation of Aβ42 was inhibited by other catechol-type flavonoids, whereas that of K16Nle-Aβ42 was not. In contrast, some non-catechol-type flavonoids suppressed the aggregation of K16Nle-Aβ42 as well as Aβ42. Furthermore, interaction of (+)-taxifolin with the β-sheet region in Aβ42 was not observed using solid-state NMR unlike curcumin of the non-catechol-type. These results demonstrate that catechol-type flavonoids could specifically suppress Aβ42 aggregation by targeting Lys residues. Although the anti-AD activity of flavonoids has been ascribed to their antioxidative activity, the mechanism that the o-quinone reacts with Lys residues of Aβ42 might be more intrinsic. The Lys residues could be targets for Alzheimer disease therapy.
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Affiliation(s)
- Mizuho Sato
- From the Division of Food Science and Biotechnology, Graduate School of Agriculture, and
| | - Kazuma Murakami
- From the Division of Food Science and Biotechnology, Graduate School of Agriculture, and
| | - Mayumi Uno
- From the Division of Food Science and Biotechnology, Graduate School of Agriculture, and
| | - Yu Nakagawa
- From the Division of Food Science and Biotechnology, Graduate School of Agriculture, and
- the Synthetic Cellular Chemistry Laboratory, RIKEN Advanced Science Institute, Saitama 351-0198
| | - Sumie Katayama
- the National Institute of Biomedical Innovation, Osaka 567-0085, and
| | - Ken-ichi Akagi
- the National Institute of Biomedical Innovation, Osaka 567-0085, and
| | - Yuichi Masuda
- the Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502
- the Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Kiyonori Takegoshi
- the Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502
| | - Kazuhiro Irie
- From the Division of Food Science and Biotechnology, Graduate School of Agriculture, and
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40
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Wang Q, Yu X, Patal K, Hu R, Chuang S, Zhang G, Zheng J. Tanshinones inhibit amyloid aggregation by amyloid-β peptide, disaggregate amyloid fibrils, and protect cultured cells. ACS Chem Neurosci 2013; 4:1004-15. [PMID: 23506133 PMCID: PMC3756451 DOI: 10.1021/cn400051e] [Citation(s) in RCA: 162] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 03/18/2013] [Indexed: 01/10/2023] Open
Abstract
The misfolding and aggregation of amyloid-β (Aβ) peptides into amyloid fibrils is regarded as one of the causative events in the pathogenesis of Alzheimer's disease (AD). Tanshinones extracted from Chinese herb Danshen (Salvia Miltiorrhiza Bunge) were traditionally used as anti-inflammation and cerebrovascular drugs due to their antioxidation and antiacetylcholinesterase effects. A number of studies have suggested that tanshinones could protect neuronal cells. In this work, we examine the inhibitory activity of tanshinone I (TS1) and tanshinone IIA (TS2), the two major components in the Danshen herb, on the aggregation and toxicity of Aβ1-42 using atomic force microscopy (AFM), thioflavin-T (ThT) fluorescence assay, cell viability assay, and molecular dynamics (MD) simulations. AFM and ThT results show that both TS1 and TS2 exhibit different inhibitory abilities to prevent unseeded amyloid fibril formation and to disaggregate preformed amyloid fibrils, in which TS1 shows better inhibitory potency than TS2. Live/dead assay further confirms that introduction of a very small amount of tanshinones enables protection of cultured SH-SY5Y cells against Aβ-induced cell toxicity. Comparative MD simulation results reveal a general tanshinone binding mode to prevent Aβ peptide association, showing that both TS1 and TS2 preferentially bind to a hydrophobic β-sheet groove formed by the C-terminal residues of I31-M35 and M35-V39 and several aromatic residues. Meanwhile, the differences in binding distribution, residues, sites, population, and affinity between TS1-Aβ and TS2-Aβ systems also interpret different inhibitory effects on Aβ aggregation as observed by in vitro experiments. More importantly, due to nonspecific binding mode of tanshinones, it is expected that tanshinones would have a general inhibitory efficacy of a wide range of amyloid peptides. These findings suggest that tanshinones, particularly TS1 compound, offer promising lead compounds with dual protective role in anti-inflammation and antiaggregation for further development of Aβ inhibitors to prevent and disaggregate amyloid formation.
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Affiliation(s)
- Qiuming Wang
- Department of Chemical and Biomolecular Engineering, Department of Biomedical
Engineering, and College of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio
44325, United States
| | - Xiang Yu
- Department of Chemical and Biomolecular Engineering, Department of Biomedical
Engineering, and College of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio
44325, United States
| | - Kunal Patal
- Department of Chemical and Biomolecular Engineering, Department of Biomedical
Engineering, and College of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio
44325, United States
| | - Rundong Hu
- Department of Chemical and Biomolecular Engineering, Department of Biomedical
Engineering, and College of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio
44325, United States
| | - Steven Chuang
- Department of Chemical and Biomolecular Engineering, Department of Biomedical
Engineering, and College of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio
44325, United States
| | - Ge Zhang
- Department of Chemical and Biomolecular Engineering, Department of Biomedical
Engineering, and College of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio
44325, United States
| | - Jie Zheng
- Department of Chemical and Biomolecular Engineering, Department of Biomedical
Engineering, and College of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio
44325, United States
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de Tullio MB, Castelletto V, Hamley IW, Martino Adami PV, Morelli L, Castaño EM. Proteolytically inactive insulin-degrading enzyme inhibits amyloid formation yielding non-neurotoxic aβ peptide aggregates. PLoS One 2013; 8:e59113. [PMID: 23593132 PMCID: PMC3623905 DOI: 10.1371/journal.pone.0059113] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 02/11/2013] [Indexed: 01/18/2023] Open
Abstract
Insulin-degrading enzyme (IDE) is a neutral Zn2+ peptidase that degrades short peptides based on substrate conformation, size and charge. Some of these substrates, including amyloid β (Aβ) are capable of self-assembling into cytotoxic oligomers. Based on IDE recognition mechanism and our previous report of the formation of a stable complex between IDE and intact Aβ in vitro and in vivo, we analyzed the possibility of a chaperone-like function of IDE. A proteolytically inactive recombinant IDE with Glu111 replaced by Gln (IDEQ) was used. IDEQ blocked the amyloidogenic pathway of Aβ yielding non-fibrillar structures as assessed by electron microscopy. Measurements of the kinetics of Aβ aggregation by light scattering showed that 1) IDEQ effect was promoted by ATP independent of its hydrolysis, 2) end products of Aβ-IDEQ co-incubation were incapable of “seeding” the assembly of monomeric Aβ and 3) IDEQ was ineffective in reversing Aβ aggregation. Moreover, Aβ aggregates formed in the presence of IDEQ were non-neurotoxic. IDEQ had no conformational effects upon insulin (a non-amyloidogenic protein under physiological conditions) and did not disturb insulin receptor activation in cultured cells. Our results suggest that IDE has a chaperone-like activity upon amyloid-forming peptides. It remains to be explored whether other highly conserved metallopeptidases have a dual protease-chaperone function to prevent the formation of toxic peptide oligomers from bacteria to mammals.
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Affiliation(s)
- Matias B. de Tullio
- Fundación Instituto Leloir and Instituto de Investigaciones Bioquímicas de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Valeria Castelletto
- Department of Chemistry, University of Reading, Whiteknights, Reading, United Kingdom
| | - Ian W. Hamley
- Department of Chemistry, University of Reading, Whiteknights, Reading, United Kingdom
| | - Pamela V. Martino Adami
- Fundación Instituto Leloir and Instituto de Investigaciones Bioquímicas de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Laura Morelli
- Fundación Instituto Leloir and Instituto de Investigaciones Bioquímicas de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Eduardo M. Castaño
- Fundación Instituto Leloir and Instituto de Investigaciones Bioquímicas de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
- * E-mail:
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42
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Wu C, Lim JY, Fuller GG, Cegelski L. Disruption of Escherichia coli amyloid-integrated biofilm formation at the air-liquid interface by a polysorbate surfactant. Langmuir 2013; 29:920-926. [PMID: 23259693 PMCID: PMC3557966 DOI: 10.1021/la304710k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Functional amyloid fibers termed curli contribute to bacterial adhesion and biofilm formation in Escherichia coli . We discovered that the nonionic surfactant Tween 20 inhibits biofilm formation by uropathogenic E. coli at the air-liquid interface, referred to as pellicle formation, and at the solid-liquid interface. At Tween 20 concentrations near and above the critical micelle concentration, the interfacial viscoelastic modulus is reduced to zero as cellular aggregates at the air-liquid interface are locally disconnected and eventually eliminated. Tween 20 does not inhibit the production of curli but prevents curli-integrated film formation. Our results support a model in which the hydrophobic curli fibers associated with bacteria near the air-liquid interface require access to the gas phase to formed strong physical entanglements and to form a network that can support shear stress.
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Affiliation(s)
- Cynthia Wu
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305
| | - Ji Youn Lim
- Department of Chemistry, Stanford University, Stanford, CA 94305
| | - Gerald G. Fuller
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305
| | - Lynette Cegelski
- Department of Chemistry, Stanford University, Stanford, CA 94305
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Liao YH, Chang YJ, Yoshiike Y, Chang YC, Chen YR. Negatively charged gold nanoparticles inhibit Alzheimer's amyloid-β fibrillization, induce fibril dissociation, and mitigate neurotoxicity. Small 2012; 8:3631-9. [PMID: 22915547 DOI: 10.1002/smll.201201068] [Citation(s) in RCA: 219] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 06/29/2012] [Indexed: 05/23/2023]
Abstract
Amyloids are pathogenic hallmarks in many neurodegenerative diseases such as amyloid-β (Aβ) fibrils in Alzheimer's disease (AD). Here, the effect of gold nanoparticles (AuNPs) on amyloids is examined using Aβ as a model system. It is found that bare AuNPs inhibited Aβ fibrillization to form fragmented fibrils and spherical oligomers. Adding bare AuNPs to preformed Aβ fibrils results in ragged species where AuNPs bind preferentially to fibrils. Similar results are demonstrated with carboxyl- but not amine-conjugated AuNPs. Co-incubation of negatively charged AuNPs with Aβ relieved Aβ toxicity to neuroblastoma. Overall, it is demonstrated that AuNPs possessing negative surface potential serve as nano-chaperones to inhibit and redirect Aβ fibrillization, which could contribute to applications for AD.
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Affiliation(s)
- Yi-Hung Liao
- Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan; Genomics Research Center, Academia Sinica, Taipei, Taiwan
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Milton NGN, Harris JR. Fibril formation and toxicity of the non-amyloidogenic rat amylin peptide. Micron 2012; 44:246-53. [PMID: 22854213 DOI: 10.1016/j.micron.2012.07.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 07/09/2012] [Accepted: 07/10/2012] [Indexed: 01/09/2023]
Abstract
Full-length native rat amylin 1-37 has previously been widely shown to be unable to form fibrils and to lack the toxicity of the human amylin form leading to its use as a non-amyloidogenic control peptide. A recent study has suggested that rat amylin 1-37 forms amyloidogenic β-sheet structures in the presence of the human amylin form and suggested that this property could promote toxicity. Using TEM analysis we show here fibril formation by synthetic rat amylin 1-37 and 8-37 peptides when the lyophilized HPLC purified peptides are initially dissolved in 20 mM Tris-HCl. Dissolution of synthetic rat amylin 1-37 and 8-37 peptides in H(2)O or phosphate buffered saline failed to produce fibrils. Addition of 20 mM Tris-HCl to synthetic rat amylin 1-37 and 8-37 peptides initially dissolved in H(2)O also failed to induce fibril formation. The rat amylin fibrils have a uniform structure and bind Congo red suggesting that they are amyloid fibrils. The rat amylin fibrils also bind catalase, which could be inhibited by Amyloid-β 31-35 and a catalase amyloid-β binding domain-like peptide (R9). The rat amylin 1-37 and 8-37 fibrils are toxic in both human pancreatic islet and neuronal cell culture systems. The toxicity of rat amylin fibrils can be inhibited by an amylin receptor antagonist (AC187) and a caspase inhibitor (zVAD-fmk) in a similar manner to previous observations for human amylin toxicity. Chemically induced rat amylin fibril formation of uniform structured fibrils provides a potentially novel anti-amyloid drug discovery tool.
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Affiliation(s)
- Nathaniel G N Milton
- Department of Human & Health Sciences, School of Life Sciences, University of Westminster, London W1W 6UW, UK.
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Bobylev AG, Shpagina MD, Bobyleva LG, Okuneva AD, Piotrovskiĭ LB, Podlubnaia ZA. [Antiamyloid properties of fullerene C60 derivatives]. Biofizika 2012; 57:416-421. [PMID: 22873064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A comparative estimation of the ability of complexes of fullerene C60 with polyvinylpyrrolidone and fullerene C60 derivatives (the sodium salt of the polycarboxylic derivative of fullerene C60, sodium fullerenolate), has been carried out. The fullerenes destroyed amyloid fibrils of the Abeta(1-42) peptide of the brain and the muscle X-protein. A study of the effect of fullerenes on muscle actin showed that complexes of fullerene C60 with polyvinylpyrrolidone and sodium fullerenolate did not prevent the filament formation of actin, nor did they destroy its filaments in vitro. Conversely, sodium salt of the polycarboxylic derivative of fullerene C60 destroyed actin filaments and prevented their formation. It was concluded that sodium fullerenolate and complexes of fullerene C60 with polyvinylpyrrolidone are the most effective antiamyloid compounds among the fullerenes examined.
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Landreh M, Stukenborg JB, Willander H, Söder O, Johansson J, Jörnvall H. Proinsulin C-peptide interferes with insulin fibril formation. Biochem Biophys Res Commun 2012; 418:489-93. [PMID: 22281499 DOI: 10.1016/j.bbrc.2012.01.051] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2012] [Accepted: 01/10/2012] [Indexed: 02/07/2023]
Abstract
Insulin aggregation can prevent rapid insulin uptake and cause localized amyloidosis in the treatment of type-1 diabetes. In this study, we investigated the effect of C-peptide, the 31-residue peptide cleaved from proinsulin, on insulin fibrillation at optimal conditions for fibrillation. This is at low pH and high concentration, when the fibrils formed are regular and extended. We report that C-peptide then modulates the insulin aggregation lag time and profoundly changes the fibril appearance, to rounded clumps of short fibrils, which, however, still are Thioflavine T-positive. Electrospray ionization mass spectrometry also indicates that C-peptide interacts with aggregating insulin and is incorporated into the aggregates. Hydrogen/deuterium exchange mass spectrometry further reveals reduced backbone accessibility in insulin aggregates formed in the presence of C-peptide. Combined, these effects are similar to those of C-peptide on islet amyloid polypeptide fibrillation and suggest that C-peptide has a general ability to interact with amyloidogenic proteins from pancreatic β-cell granules. Considering the concentrations, these peptide interactions should be relevant also during physiological secretion, and even so at special sites post-secretory or under insulin treatment conditions in vivo.
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Affiliation(s)
- Michael Landreh
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, S-171 77 Stockholm, Sweden
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Abstract
Amyloid is aggregated protein in the form of insoluble fibrils. Amyloid deposition in human tissue-amyloidosis-is associated with a number of diseases including all common dementias and type II diabetes. Considerable progress has been made to understand the mechanisms leading to amyloid formation. It is, however, not yet clear by which mechanisms amyloid and protein aggregates formed on the path to amyloid are cytotoxic. Strategies to prevent protein aggregation and amyloid formation are nevertheless, in many cases, promising and even successful. This review covers research on intervention of amyloidosis and highlights several examples of how inhibition of protein aggregation and amyloid formation has been achieved in practice. For instance, rational design can provide drugs that stabilize a native folded state of a protein, protein engineering can provide new binding proteins that sequester monomeric peptides from aggregation, small molecules and peptides can be designed to block aggregation or direct it into non-cytotoxic paths, and monoclonal antibodies have been developed for therapies towards neurodegenerative diseases based on inhibition of amyloid formation and clearance.
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Affiliation(s)
- Torleif Härd
- Department of Molecular Biology, Swedish University of Agricultural Sciences, SE-751 24 Uppsala, Sweden.
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Subramanian SL, Hull RL, Zraika S, Aston-Mourney K, Udayasankar J, Kahn SE. cJUN N-terminal kinase (JNK) activation mediates islet amyloid-induced beta cell apoptosis in cultured human islet amyloid polypeptide transgenic mouse islets. Diabetologia 2012; 55:166-74. [PMID: 22038516 PMCID: PMC3249975 DOI: 10.1007/s00125-011-2338-7] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 09/12/2011] [Indexed: 12/16/2022]
Abstract
AIMS/HYPOTHESIS Aggregation of human islet amyloid polypeptide (hIAPP) as islet amyloid is associated with increased beta cell apoptosis and reduced beta cell mass in type 2 diabetes. Islet amyloid formation induces oxidative stress, which contributes to beta cell apoptosis. The cJUN N-terminal kinase (JNK) pathway is a critical mediator of beta cell apoptosis in response to stress stimuli including oxidative stress and exogenous application of hIAPP. We determined whether amyloid formation by endogenous hIAPP mediates beta cell apoptosis through JNK activation and downstream signalling pathways. METHODS hIAPP transgenic and non-transgenic mouse islets were cultured for up to 144 h in 16.7 mmol/l glucose to induce islet amyloid in the presence or absence of the amyloid inhibitor Congo Red or a cell-permeable JNK inhibitor. Amyloid, beta cell apoptosis, JNK signalling and activation of downstream targets in the intrinsic and extrinsic apoptotic pathways were measured. RESULTS JNK activation occurred with islet amyloid formation in hIAPP transgenic islets after 48 and 144 h in culture. Neither high glucose nor the hIAPP transgene alone was sufficient to activate JNK independent of islet amyloid. Inhibition of islet amyloid formation with Congo Red reduced beta cell apoptosis and partially decreased JNK activation. JNK inhibitor treatment reduced beta cell apoptosis without affecting islet amyloid. Islet amyloid increased mRNA levels of markers of the extrinsic (Fas, Fadd) and intrinsic (Bim [also known as Bcl2l11]) apoptotic pathways, caspase 3 and the anti-apoptotic molecule Bclxl (also known as Bcl2l1) in a JNK-dependent manner. CONCLUSIONS/INTERPRETATION Islet amyloid formation induces JNK activation, which upregulates predominantly pro-apoptotic signals in both extrinsic and intrinsic pathways, resulting in beta cell apoptosis.
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Cheng B, Liu X, Gong H, Huang L, Chen H, Zhang X, Li C, Yang M, Ma B, Jiao L, Zheng L, Huang K. Coffee components inhibit amyloid formation of human islet amyloid polypeptide in vitro: possible link between coffee consumption and diabetes mellitus. J Agric Food Chem 2011; 59:13147-55. [PMID: 22059381 DOI: 10.1021/jf201702h] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Global epidemic studies have suggested that coffee consumption is reversely correlated with the incidence of type 2 diabetes mellitus (T2DM), a metabolic disease. The misfolding of human islet amyloid polypeptide (hIAPP) is regarded as one of the causative factors of T2DM. Coffee extracts have three major active components: caffeine, caffeic acid (CA), and chlorogenic acid (CGA). In this study, the effects of these major coffee components, as well as dihydrocaffeic acid (DHCA) (a major metabolite of CGA and CA), on the amyloidogenicity of hIAPP were investigated by thioflavin-T based fluorescence emission, transmission electronic microscopy, circular dichroism, light-induced cross-linking, dynamic light scattering, and MTT-based cell viability assays. The results suggest that all components show varied inhibitory effects on the formation of toxic hIAPP amyloids, in which CA shows the highest potency in delaying the conformational transition of the hIAPP molecule with the most prolonged lag time, whereas caffeine shows the lowest potency. At a 5-fold excess molar ratio of compound to hIAPP, all coffee-derived compounds affect the secondary structures of incubated hIAPP as suggested by the circular dichroism spectra and CDPro deconvolution analysis. Further photoinduced cross-linking based oligomerization and dynamic light scattering studies suggested CA and CGA significantly suppressed the formation of hIAPP oligomers, whereas caffeine showed no significant effect on oligomerization. Cell protection effects were also observed for all three compounds, with the protection efficiency being greatest for CA and least for CGA. These findings suggest that the beneficial effects of coffee consumption on T2DM may be partly due to the ability of the major coffee components and metabolites to inhibit the toxic aggregation of hIAPP.
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Affiliation(s)
- Biao Cheng
- Tongji School of Pharmacy, Huazhong University of Science and Technology, Wuhan, Hubei 430030, People's Republic of China
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Jia X, Gharibyan AL, Öhman A, Liu Y, Olofsson A, Morozova-Roche LA. Neuroprotective and nootropic drug noopept rescues α-synuclein amyloid cytotoxicity. J Mol Biol 2011; 414:699-712. [PMID: 21986202 DOI: 10.1016/j.jmb.2011.09.044] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Revised: 09/19/2011] [Accepted: 09/24/2011] [Indexed: 11/18/2022]
Abstract
Parkinson's disease is a common neurodegenerative disorder characterized by α-synuclein (α-Syn)-containing Lewy body formation and selective loss of dopaminergic neurons in the substantia nigra. We have demonstrated the modulating effect of noopept, a novel proline-containing dipeptide drug with nootropic and neuroprotective properties, on α-Syn oligomerization and fibrillation by using thioflavin T fluorescence, far-UV CD, and atomic force microscopy techniques. Noopept does not bind to a sterically specific site in the α-Syn molecule as revealed by heteronuclear two-dimensional NMR analysis, but due to hydrophobic interactions with toxic amyloid oligomers, it prompts their rapid sequestration into larger fibrillar amyloid aggregates. Consequently, this process rescues the cytotoxic effect of amyloid oligomers on neuroblastoma SH-SY5Y cells as demonstrated by using cell viability assays and fluorescent staining of apoptotic and necrotic cells and by assessing the level of intracellular oxidative stress. The mitigating effect of noopept against amyloid oligomeric cytotoxicity may offer additional benefits to the already well-established therapeutic functions of this new pharmaceutical.
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Affiliation(s)
- Xueen Jia
- Department of Medical Biochemistry and Biophysics, Umeå University, SE-90187 Umeå, Sweden
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