1
|
Lindberg M, Axell E, Sparr E, Linse S. A label-free high-throughput protein solubility assay and its application to Aβ40. Biophys Chem 2024; 307:107165. [PMID: 38309218 DOI: 10.1016/j.bpc.2023.107165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/18/2023] [Accepted: 12/25/2023] [Indexed: 02/05/2024]
Abstract
A major hallmark of Alzheimer's disease is the accumulation of aggregated amyloid β peptide (Aβ) in the brain. Here we develop a solubility assay for proteins and measure the solubility of Aβ40. In brief, the method utilizes 96-well filter plates to separate monomeric Aβ from aggregated Aβ, and the small species are quantified with the amine reactive dye o-phthalaldehyde (OPA). This procedure ensures that solubility is measured for unlabeled species, and makes the assay high-throughput and inexpensive. We demonstrate that the filter plates successfully separate fibrils from monomer, with negligible monomer adsorption, and that OPA can quantify Aβ peptides in a concentration range from 40 nM to 20 μM. We also show that adding a methionine residue to the N-terminus of Aβ1-40 decreases the solubility by <3-fold. The method will facilitate further solubility studies, and contribute to the understanding of the thermodynamics of amyloid fibril formation.
Collapse
Affiliation(s)
- Max Lindberg
- Biochemistry and Structural Biology, Lund University, Lund, Sweden
| | - Emil Axell
- Biochemistry and Structural Biology, Lund University, Lund, Sweden
| | - Emma Sparr
- Division of Physical Chemistry, Department of Chemistry, Lund University, Lund, Sweden
| | - Sara Linse
- Biochemistry and Structural Biology, Lund University, Lund, Sweden.
| |
Collapse
|
2
|
Windheim J, Colombo L, Battajni NC, Russo L, Cagnotto A, Diomede L, Bigini P, Vismara E, Fiumara F, Gabbrielli S, Gautieri A, Mazzuoli-Weber G, Salmona M, Colnaghi L. Micro- and Nanoplastics’ Effects on Protein Folding and Amyloidosis. Int J Mol Sci 2022; 23:ijms231810329. [PMID: 36142234 PMCID: PMC9499421 DOI: 10.3390/ijms231810329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/02/2022] [Accepted: 09/03/2022] [Indexed: 11/30/2022] Open
Abstract
A significant portion of the world’s plastic is not properly disposed of and, through various processes, is degraded into microscopic particles termed micro- and nanoplastics. Marine and terrestrial faunae, including humans, inevitably get in contact and may inhale and ingest these microscopic plastics which can deposit throughout the body, potentially altering cellular and molecular functions in the nervous and other systems. For instance, at the cellular level, studies in animal models have shown that plastic particles can cross the blood–brain barrier and interact with neurons, and thus affect cognition. At the molecular level, plastics may specifically influence the folding of proteins, induce the formation of aberrant amyloid proteins, and therefore potentially trigger the development of systemic and local amyloidosis. In this review, we discuss the general issue of plastic micro- and nanoparticle generation, with a focus on their effects on protein folding, misfolding, and their possible clinical implications.
Collapse
Affiliation(s)
- Joseph Windheim
- Department of Medicine, NYU Grossman School of Medicine, New York, NY 10016, USA
| | - Laura Colombo
- Department of Molecular Biochemistry and Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milan, Italy
| | - Nora C. Battajni
- Department of Molecular Biochemistry and Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milan, Italy
| | - Luca Russo
- Department of Molecular Biochemistry and Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milan, Italy
| | - Alfredo Cagnotto
- Department of Molecular Biochemistry and Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milan, Italy
| | - Luisa Diomede
- Department of Molecular Biochemistry and Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milan, Italy
| | - Paolo Bigini
- Department of Molecular Biochemistry and Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milan, Italy
| | - Elena Vismara
- Department of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, 20156 Milan, Italy
| | - Ferdinando Fiumara
- Rita Levi Montalcini Department of Neuroscience, University of Torino, Corso Raffaello 30, 10125 Torino, Italy
- National Institute of Neuroscience (INN), University of Torino, Corso Raffaello 30, 10125 Torino, Italy
| | - Silvia Gabbrielli
- Biomolecular Engineering Lab, Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Alfonso Gautieri
- Biomolecular Engineering Lab, Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Gemma Mazzuoli-Weber
- Center for Systems Neuroscience (ZSN), 30559 Hannover, Germany
- Institute for Physiology and Cell Biology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
| | - Mario Salmona
- Department of Molecular Biochemistry and Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milan, Italy
| | - Luca Colnaghi
- Department of Molecular Biochemistry and Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milan, Italy
- Correspondence: ; Tel.: +39-02-2643-4818
| |
Collapse
|
3
|
van der Voet M, Teunis M, Louter-van de Haar J, Stigter N, Bhalla D, Rooseboom M, Wever KE, Krul C, Pieters R, Wildwater M, van Noort V. Towards a reporting guideline for developmental and reproductive toxicology testing in C. elegans and other nematodes. Toxicol Res (Camb) 2021; 10:1202-1210. [PMID: 34950447 PMCID: PMC8692742 DOI: 10.1093/toxres/tfab109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 10/07/2021] [Accepted: 10/27/2021] [Indexed: 11/13/2022] Open
Abstract
Implementation of reliable methodologies allowing Reduction, Refinement, and Replacement (3Rs) of animal testing is a process that takes several decades and is still not complete. Reliable methods are essential for regulatory hazard assessment of chemicals where differences in test protocol can influence the test outcomes and thus affect the confidence in the predictive value of the organisms used as an alternative for mammals. Although test guidelines are common for mammalian studies, they are scarce for non-vertebrate organisms that would allow for the 3Rs of animal testing. Here, we present a set of 30 reporting criteria as the basis for such a guideline for Developmental and Reproductive Toxicology (DART) testing in the nematode Caenorhabditis elegans. Small organisms like C. elegans are upcoming in new approach methodologies for hazard assessment; thus, reliable and robust test protocols are urgently needed. A literature assessment of the fulfilment of the reporting criteria demonstrates that although studies describe methodological details, essential information such as compound purity and lot/batch number or type of container is often not reported. The formulated set of reporting criteria for C. elegans testing can be used by (i) researchers to describe essential experimental details (ii) data scientists that aggregate information to assess data quality and include data in aggregated databases (iii) regulators to assess study data for inclusion in regulatory hazard assessment of chemicals.
Collapse
Affiliation(s)
| | - Marc Teunis
- Utrecht University of Applied Sciences, Innovative testing in Life Sciences & Chemistry, 3584 CH, Utrecht, the Netherlands
| | - Johanna Louter-van de Haar
- Utrecht University of Applied Sciences, Innovative testing in Life Sciences & Chemistry, 3584 CH, Utrecht, the Netherlands
| | - Nienke Stigter
- Utrecht University of Applied Sciences, Innovative testing in Life Sciences & Chemistry, 3584 CH, Utrecht, the Netherlands
| | - Diksha Bhalla
- KU Leuven, Centre of Microbial and Plant Genetics, Faculty of Bioscience Engineering, 3001, Leuven, Belgium
| | - Martijn Rooseboom
- Toxicology group Shell International B.V., 2596 HR, The Hague, the Netherlands
| | - Kimberley E Wever
- Radboud University Medical Center, Radboud Institute for Health Sciences, Department for Health Evidence, 6525 GA, Nijmegen, the Netherlands
| | - Cyrille Krul
- Utrecht University of Applied Sciences, Innovative testing in Life Sciences & Chemistry, 3584 CH, Utrecht, the Netherlands
| | - Raymond Pieters
- Utrecht University of Applied Sciences, Innovative testing in Life Sciences & Chemistry, 3584 CH, Utrecht, the Netherlands
- Utrecht University, Institute for Risk Assessment Sciences, 3584 CM, Utrecht, the Netherlands
| | | | - Vera van Noort
- KU Leuven, Centre of Microbial and Plant Genetics, Faculty of Bioscience Engineering, 3001, Leuven, Belgium
- Leiden University, Institute of Biology Leiden, 2333 BE, Leiden, the Netherlands
| |
Collapse
|
4
|
de Castro Fonseca M, de Oliveira JF, Araujo BHS, Canateli C, do Prado PFV, Amorim Neto DP, Bosque BP, Rodrigues PV, de Godoy JVP, Tostes K, Filho HVR, Nascimento AFZ, Saito A, Tonoli CCC, Batista FAH, de Oliveira PSL, Figueira AC, Souza da Costa S, Krepischi ACV, Rosenberg C, Westfahl H, da Silva AJR, Franchini KG. Molecular and cellular basis of hyperassembly and protein aggregation driven by a rare pathogenic mutation in DDX3X. iScience 2021; 24:102841. [PMID: 34381968 PMCID: PMC8335631 DOI: 10.1016/j.isci.2021.102841] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 05/21/2021] [Accepted: 07/08/2021] [Indexed: 12/30/2022] Open
Abstract
Current studies estimate that 1–3% of females with unexplained intellectual disability (ID) present de novo splice site, nonsense, frameshift, or missense mutations in the DDX3X protein (DEAD-Box Helicase 3 X-Linked). However, the cellular and molecular mechanisms by which DDX3X mutations impair brain development are not fully comprehended. Here, we show that the ID-linked missense mutation L556S renders DDX3X prone to aggregation. By using a combination of biophysical assays and imaging approaches, we demonstrate that this mutant assembles solid-like condensates and amyloid-like fibrils. Although we observed greatly reduced expression of the mutant allele in a patient who exhibits skewed X inactivation, this appears to be enough to sequestrate healthy proteins into solid-like ectopic granules, compromising cell function. Therefore, our data suggest ID-linked DDX3X L556S mutation as a disorder arising from protein misfolding and aggregation. DDX3X mutations skew X-inactivation and are found in 1-3% of unexplained ID in females DDX3X mutant proteins assemble solid-like condensates and amyloid-like fibrils Aberrant granules formed by DDX3X mutants sequestrate healthy DDX3X protein ID-linked DDX3X L556S mutation decreases cell viability and induces apoptosis
Collapse
Affiliation(s)
- Matheus de Castro Fonseca
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Juliana Ferreira de Oliveira
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Bruno Henrique Silva Araujo
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Camila Canateli
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Paula Favoretti Vital do Prado
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Dionísio Pedro Amorim Neto
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil.,Department of Structural and Functional Biology, State University of Campinas, Campinas, Brazil
| | - Beatriz Pelegrini Bosque
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil.,Department of Structural and Functional Biology, State University of Campinas, Campinas, Brazil
| | - Paulla Vieira Rodrigues
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil.,Department of Structural and Functional Biology, State University of Campinas, Campinas, Brazil
| | - João Vitor Pereira de Godoy
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil.,Department of Structural and Functional Biology, State University of Campinas, Campinas, Brazil
| | - Katiane Tostes
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Helder Veras Ribeiro Filho
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Andrey Fabricio Ziem Nascimento
- Brazilian Synchrotron Light National Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Angela Saito
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Celisa Caldana Costa Tonoli
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Fernanda Aparecida Heleno Batista
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Paulo Sergio Lopes de Oliveira
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Ana Carolina Figueira
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Silvia Souza da Costa
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Ana Cristina Victorino Krepischi
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Carla Rosenberg
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Harry Westfahl
- Brazilian Synchrotron Light National Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Antônio José Roque da Silva
- Brazilian Synchrotron Light National Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Kleber Gomes Franchini
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil.,Department of Internal Medicine, School of Medicine, University of Campinas, Campinas, Brazil
| |
Collapse
|
5
|
Kelley M, Sant’Anna R, Fernandes L, Palhano FL. Pentameric Thiophene as a Probe to Monitor EGCG's Remodeling Activity of Mature Amyloid Fibrils: Overcoming Signal Artifacts of Thioflavin T. ACS OMEGA 2021; 6:8700-8705. [PMID: 33817533 PMCID: PMC8015118 DOI: 10.1021/acsomega.1c00680] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 03/05/2021] [Indexed: 06/12/2023]
Abstract
Thioflavin T fluorescence is a gold standard probe for the detection of amyloid fibrils. Herein, we showed that mature amyloid fibrils incubated with polyphenol epigallocatechin gallate (EGCG) present a fast reduction of the thioflavin T fluorescence, which is not related to remodeling activity. We propose the use of the pentameric thiophene fluorescence for monitoring the polyphenol remodeling activity.
Collapse
|
6
|
Gururaj S, Sampognaro PJ, Argouarch AR, Kao AW. Progranulin Adsorbs to Polypropylene Tubes and Disrupts Functional Assays: Implications for Research, Biomarker Studies, and Therapeutics. Front Neurosci 2021; 14:602235. [PMID: 33381010 PMCID: PMC7768044 DOI: 10.3389/fnins.2020.602235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 11/16/2020] [Indexed: 11/19/2022] Open
Abstract
Progranulin (PGRN) is a tightly regulated, secreted glycoprotein involved in a wide range of biological processes that is of tremendous interest to the scientific community due to its involvement in neoplastic, neurodevelopmental, and neurodegenerative diseases. In particular, progranulin haploinsufficiency leads to frontotemporal dementia. While performing experiments with a HIS-tagged recombinant human (rh) PGRN protein, we observed a measurable depletion of protein from solution due to its adsorption onto polypropylene (PPE) microcentrifuge tubes. In this study, we have quantified the extent of rhPGRN adsorption to PPE tubes while varying experimental conditions, including incubation time and temperature. We found that ∼25–35% of rhPGRN becomes adsorbed to the surface of PPE tubes even after a short incubation period. We then directly showed the deleterious impact of PGRN adsorption in functional assays and have recommended alternative labware to minimize these effects. Although the risk of adsorption of some purified proteins and peptides to polymer plastics has been characterized previously, this is the first report of rhPGRN adsorption. Moreover, since PGRN is currently being studied and utilized in both basic science laboratories to perform in vitro studies and translational laboratories to survey PGRN as a quantitative dementia biomarker and potential replacement therapy, the reported observations here are broadly impactful and will likely significantly affect the design and interpretation of future experiments centered on progranulin biology.
Collapse
Affiliation(s)
- Sushmitha Gururaj
- Memory and Aging Center, Department of Neurology, University of California, San Francisco, San Francisco, CA, United States
| | - Paul J Sampognaro
- Memory and Aging Center, Department of Neurology, University of California, San Francisco, San Francisco, CA, United States
| | - Andrea R Argouarch
- Memory and Aging Center, Department of Neurology, University of California, San Francisco, San Francisco, CA, United States
| | - Aimee W Kao
- Memory and Aging Center, Department of Neurology, University of California, San Francisco, San Francisco, CA, United States
| |
Collapse
|
7
|
Stepanenko OV, Sulatsky MI, Mikhailova EV, Stepanenko OV, Povarova OI, Kuznetsova IM, Turoverov KK, Sulatskaya AI. Alpha-B-Crystallin Effect on Mature Amyloid Fibrils: Different Degradation Mechanisms and Changes in Cytotoxicity. Int J Mol Sci 2020; 21:ijms21207659. [PMID: 33081200 PMCID: PMC7589196 DOI: 10.3390/ijms21207659] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/10/2020] [Accepted: 10/13/2020] [Indexed: 12/11/2022] Open
Abstract
Given the ability of molecular chaperones and chaperone-like proteins to inhibit the formation of pathological amyloid fibrils, the chaperone-based therapy of amyloidosis has recently been proposed. However, since these diseases are often diagnosed at the stages when a large amount of amyloids is already accumulated in the patient’s body, in this work we pay attention to the undeservedly poorly studied problem of chaperone and chaperone-like proteins’ effect on mature amyloid fibrils. We showed that a heat shock protein alpha-B-crystallin, which is capable of inhibiting fibrillogenesis and is found in large quantities as a part of amyloid plaques, can induce degradation of mature amyloids by two different mechanisms. Under physiological conditions, alpha-B-crystallin induces fluffing and unweaving of amyloid fibrils, which leads to a partial decrease in their structural ordering without lowering their stability and can increase their cytotoxicity. We found a higher correlation between the rate and effectiveness of amyloids degradation with the size of fibrils clusters rather than with amino acid sequence of amyloidogenic protein. Some external effects (such as an increase in medium acidity) can lead to a change in the mechanism of fibrils degradation induced by alpha-B-crystallin: amyloid fibers are fragmented without changing their secondary structure and properties. According to recent data, fibrils cutting can lead to the generation of seeds for new bona fide amyloid fibrils and accelerate the accumulation of amyloids, as well as enhance the ability of fibrils to disrupt membranes and to reduce cell viability. Our results emphasize the need to test the chaperone effect not only on fibrillogenesis, but also on the mature amyloid fibrils, including stress conditions, in order to avoid undesirable disease progression during chaperone-based therapy.
Collapse
Affiliation(s)
- Olga V. Stepanenko
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
| | - M. I. Sulatsky
- Laboratory of Cell Morphology, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia;
| | - E. V. Mikhailova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
| | - Olesya V. Stepanenko
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
| | - O. I. Povarova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
| | - I. M. Kuznetsova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
| | - K. K. Turoverov
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
- Peter the Great St.-Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia
- Correspondence: ; Tel.: +7-812-297-19-57
| | - A. I. Sulatskaya
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
| |
Collapse
|
8
|
Fernandes L, Messias B, Pereira-Neves A, Azevedo EP, Araújo J, Foguel D, Palhano FL. Green Tea Polyphenol Microparticles Based on the Oxidative Coupling of EGCG Inhibit Amyloid Aggregation/Cytotoxicity and Serve as a Platform for Drug Delivery. ACS Biomater Sci Eng 2020; 6:4414-4423. [PMID: 33455167 DOI: 10.1021/acsbiomaterials.0c00188] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The accumulation of cross-β-sheet amyloid fibrils is a hallmark of all human amyloid diseases. The compound epigallocatechin-3-gallate (EGCG), the main polyphenol present in green tea, has been described to have beneficial effects in several pathologies, including amyloidogenic diseases. This polyphenol blocks amyloidogenesis and disaggregates a broad range of amyloidogenic peptides comprising amyloid fibrils in vitro. The mechanism by which EGCG acts in the context of amyloid aggregation is not clear. Most of the biological effects of EGCG are attributable to its antioxidant activity. However, EGCG-oxidized products appear to be sufficient for the majority of EGCG amyloid remodeling observed against some polypeptides. If controlled, EGCG oxidation can afford homogenous microparticles (MPs) and can serve as drug delivery agents. Herein, we produced EGCG MPs by oxidative coupling and analyzed their activity during the aggregation of the protein α-synuclein (α-syn), the main protein related to Parkinson's disease. The MPs modestly remodeled mature amyloid fibrils and efficiently inhibited the amyloidogenic aggregation of α-syn. The MPs showed low cytotoxicity against both dopaminergic cells and microglial cells. The MPs reduced the cytotoxic effects of α-syn oligomers. Interestingly, the MPs were loaded with another antiamyloidogenic compound, increasing their activity against amyloid aggregation. We propose the use of EGCG MPs as a bifunctional strategy, blocking amyloid aggregation directly and carrying a molecule that can act synergistically to alleviate the symptoms caused by the amyloidogenic pathway.
Collapse
Affiliation(s)
- Luiza Fernandes
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-590, Brazil
| | - Beatriz Messias
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-590, Brazil
| | - Antonio Pereira-Neves
- Fiocruz Pernambuco, Departamento de Microbiologia, Instituto Aggeu Magalhães, Recife, Pernambuco 50740-465, Brazil
| | - Estefania P Azevedo
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-590, Brazil
| | - Júlia Araújo
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-590, Brazil
| | - Debora Foguel
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-590, Brazil
| | - Fernando L Palhano
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-590, Brazil
| |
Collapse
|
9
|
The Aggregation Conditions Define Whether EGCG is an Inhibitor or Enhancer of α-Synuclein Amyloid Fibril Formation. Int J Mol Sci 2020; 21:ijms21061995. [PMID: 32183378 PMCID: PMC7139648 DOI: 10.3390/ijms21061995] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/03/2020] [Accepted: 03/11/2020] [Indexed: 12/13/2022] Open
Abstract
The amyloid fibril formation by α-synuclein is a hallmark of various neurodegenerative disorders, most notably Parkinson’s disease. Epigallocatechin gallate (EGCG) has been reported to be an efficient inhibitor of amyloid formation by numerous proteins, among them α-synuclein. Here, we show that this applies only to a small region of the relevant parameter space, in particular to solution conditions where EGCG readily oxidizes, and we find that the oxidation product is a much more potent inhibitor compared to the unmodified EGCG. In addition to its inhibitory effects, EGCG and its oxidation products can under some conditions even accelerate α-synuclein amyloid fibril formation through facilitating its heterogeneous primary nucleation. Furthermore, we show through quantitative seeding experiments that, contrary to previous reports, EGCG is not able to re-model α-synuclein amyloid fibrils into seeding-incompetent structures. Taken together, our results paint a complex picture of EGCG as a compound that can under some conditions inhibit the amyloid fibril formation of α-synuclein, but the inhibitory action is not robust against various physiologically relevant changes in experimental conditions. Our results are important for the development of strategies to identify and characterize promising amyloid inhibitors.
Collapse
|
10
|
The Environment Is a Key Factor in Determining the Anti-Amyloid Efficacy of EGCG. Biomolecules 2019; 9:biom9120855. [PMID: 31835741 PMCID: PMC6995563 DOI: 10.3390/biom9120855] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/06/2019] [Accepted: 12/06/2019] [Indexed: 02/06/2023] Open
Abstract
Millions of people around the world suffer from amyloid-related disorders, including Alzheimer's and Parkinson's diseases. Despite significant and sustained efforts, there are still no disease-modifying drugs available for the majority of amyloid-related disorders, and the overall failure rate in clinical trials is very high, even for compounds that show promising anti-amyloid activity in vitro. In this study, we demonstrate that even small changes in the chemical environment can strongly modulate the inhibitory effects of anti-amyloid compounds. Using one of the best-established amyloid inhibitory compounds, epigallocatechin-3-gallate (EGCG), as an example, and two amyloid-forming proteins, insulin and Parkinson's disease-related α -synuclein, we shed light on the previously unexplored sensitivity to solution conditions of the action of this compound on amyloid fibril formation. In the case of insulin, we show that the classification of EGCG as an amyloid inhibitor depends on the experimental conditions select, on the method used for the evaluation of the efficacy, and on whether or not EGCG is allowed to oxidise before the experiment. For α -synuclein, we show that a small change in pH value, from 7 to 6, transforms EGCG from an efficient inhibitor to completely ineffective, and we were able to explain this behaviour by the increased stability of EGCG against oxidation at pH 6.
Collapse
|
11
|
Misra P, Blancas-Mejia LM, Ramirez-Alvarado M. Mechanistic Insights into the Early Events in the Aggregation of Immunoglobulin Light Chains. Biochemistry 2019; 58:3155-3168. [PMID: 31287666 DOI: 10.1021/acs.biochem.9b00311] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Little is known about the mechanism of amyloid assembly in immunoglobulin light chain (AL) amyloidosis, in contrast to other amyloid diseases. Early events in the aggregation pathway are especially important, as these soluble species could be cytotoxic intermediates playing a critical role in the initiation of the amyloid assembly. In this work, we discuss the mechanism of the early events in in vitro fibril formation of immunoglobulin light chain AL-09 and AL-12 (involved in cardiac amyloidosis) and its germline (control) protein κI O18/O8. Previous work from our laboratory showed that AL-12 adopts a canonical dimer conformation (like the germline protein), whereas AL-09 presents an altered dimer interface as a result of somatic mutations. Both AL-12 and AL-09 aggregate with similar rates and significantly faster than the germline protein. AL-09 is the only protein in this study that forms stable oligomeric intermediates during the early stages of the aggregation reaction with some structural rearrangements that increase the thioflavin T fluorescence but maintain the same number of monomers in solution. The presence of the restorative mutation AL-09 H87Y changes the kinetics and the aggregation pathway compared to AL-09. The single restorative mutation AL-12 R65S slightly delayed the overall rate of aggregation as compared to AL-12. Collectively, our study provides a comprehensive analysis of species formed during amyloid nucleation in AL amyloidosis, shows a strong dependence between the altered dimer conformation and the formation of stable oligomeric intermediates, and sheds light on the structural features of amyloidogenic intermediates associated with cellular toxicity.
Collapse
|
12
|
Chattopadhyay G, Varadarajan R. Facile measurement of protein stability and folding kinetics using a nano differential scanning fluorimeter. Protein Sci 2019; 28:1127-1134. [PMID: 30993730 DOI: 10.1002/pro.3622] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 04/01/2019] [Accepted: 04/01/2019] [Indexed: 01/17/2023]
Abstract
With advancements in high-throughput generation of phenotypic data on mutant proteins, it has become important to individually characterize different proteins or their variants rapidly and with minimal sample consumption. We have made use of a nano differential scanning fluorimetric device, from NanoTemper technologies, to rapidly carry out isothermal chemical denaturation and measure folding/unfolding kinetics of proteins and compared these to corresponding data obtained from conventional spectrofluorimetry. We show that using sample volumes 10-50-fold lower than with conventional fluorimetric techniques, one can rapidly and accurately measure thermodynamic and kinetic stability, as well as folding/unfolding kinetics. This method also facilitates characterization of proteins that are difficult to express and purify.
Collapse
Affiliation(s)
| | - Raghavan Varadarajan
- Molecular Biophysics Unit, Indian Institute of Science, Bangalore, India.,Jawaharlal Nehru Center for Advanced Scientific Research, Bangalore, India
| |
Collapse
|
13
|
Wreden AB, Fernandes L, Kelley M, Pereira-Neves A, Moreira CS, da Rocha DR, Palhano FL. Selective and Sensitive Pull Down of Amyloid Fibrils Produced in Vitro and in Vivo by the Use of Pentameric-Thiophene-Coupled Resins. ACS Chem Neurosci 2018; 9:2807-2814. [PMID: 29762014 DOI: 10.1021/acschemneuro.8b00222] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Protein aggregation is a hallmark of several degenerative diseases, including Alzheimer's disease, Parkinson's disease and familial amyloidosis (Finnish type) (FAF). A method to isolate and detect amyloids is desired for the diagnosis of amyloid diseases. Here, we report the synthesis of pentameric thiophene amyloid ligand (p-FTAA) linked to agarose resin for selective purification of amyloid aggregates produced in vitro and in vivo. Using amyloid fibrils produced in vitro from α-synuclein, gelsolin, and Aβ1-40 and gelsolin amyloid aggregates extracted from tissue homogenates of a mouse model of FAF, we observed that p-FTAA resin was able to pull down amyloid aggregates. The functionalized resin was also able to pull down oligomers produced in vitro from the A30P variant of α-synuclein. The methodology described here can be useful for the diagnosis of amyloidogenic disease and also can be used to purify amyloid fibrils from biological samples, rendering the fibrils available for more accurate structural and biochemical characterization.
Collapse
Affiliation(s)
- Anna Beatriz Wreden
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-590, Brazil
| | - Luiza Fernandes
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-590, Brazil
| | - Mirian Kelley
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-590, Brazil
| | - Antonio Pereira-Neves
- Fiocruz Pernambuco, Instituto Aggeu Magalhães, Departamento de Microbiologia, Recife, PE 50740-465, Brazil
| | - Caroline S. Moreira
- Departamento de Química, Instituto de Química Orgânica, Universidade Federal Fluminense, Niterói, RJ 24020-150, Brazil
| | - David R. da Rocha
- Departamento de Química, Instituto de Química Orgânica, Universidade Federal Fluminense, Niterói, RJ 24020-150, Brazil
| | - Fernando L. Palhano
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-590, Brazil
| |
Collapse
|
14
|
Toombs J, Foiani MS, Wellington H, Paterson RW, Arber C, Heslegrave A, Lunn MP, Schott JM, Wray S, Zetterberg H. Amyloid β peptides are differentially vulnerable to preanalytical surface exposure, an effect incompletely mitigated by the use of ratios. ALZHEIMER'S & DEMENTIA: DIAGNOSIS, ASSESSMENT & DISEASE MONITORING 2018; 10:311-321. [PMID: 29780875 PMCID: PMC5956932 DOI: 10.1016/j.dadm.2018.02.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Introduction We tested the hypothesis that the amyloid β (Aβ) peptide ratios are more stable than Aβ42 alone when biofluids are exposed to two preanalytical conditions known to modify measurable Aβ concentration. Methods Human cerebrospinal fluid (CSF) and culture media (CM) from human cortical neurons were exposed to a series of volumes and polypropylene surfaces. Aβ42, Aβ40, and Aβ38 peptide concentrations were measured using a multiplexed electrochemiluminescence immunoassay. Data were analyzed using mixed models in R. Results Decrease of measurable Aβ peptide concentrations was exaggerated in longer peptides, affecting the Aβ42:Aβ40 and Aβ42:Aβ38 ratios. However, the effect size of surface treatment was reduced in Aβ peptide ratios versus Aβ42 alone. For Aβ42:Aβ40, the effect was reduced by approximately 50% (volume) and 75% (transfer) as compared to Aβ42 alone. Discussion Use of Aβ ratios, in conjunction with concentrations, may mitigate confounding factors and assist the clinical diagnostic process for Alzheimer's disease.
Collapse
Affiliation(s)
- Jamie Toombs
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK
| | - Martha S Foiani
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK
| | - Henrietta Wellington
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK
| | - Ross W Paterson
- Department of Neurodegeneration, Dementia Research Centre, Institute of Neurology, London, UK
| | - Charles Arber
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK
| | - Amanda Heslegrave
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK
| | - Michael P Lunn
- Department of Neuroimmunology, Institute of Neurology, University College London, London, UK
| | - Jonathan M Schott
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK
| | - Selina Wray
- Department of Neurodegeneration, Dementia Research Centre, Institute of Neurology, London, UK
| | - Henrik Zetterberg
- Department of Molecular Neuroscience, University College London, London, UK.,UK Dementia Research Institute, London, UK.,Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| |
Collapse
|
15
|
Wördehoff MM, Hoyer W. α-Synuclein Aggregation Monitored by Thioflavin T Fluorescence Assay. Bio Protoc 2018; 8:e2941. [PMID: 30069495 DOI: 10.21769/bioprotoc.2941] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Studying the aggregation of amyloid proteins like α-synuclein in vitro is a convenient and popular tool to gain kinetic insights into aggregation as well as to study factors (e.g., aggregation inhibitors) that influence it. These aggregation assays typically make use of the fluorescence dye Thioflavin T as a sensitive fluorescence reporter of amyloid fibril formation and are conducted in a plate-reader-based format, permitting the simultaneous screening of multiple samples and conditions. However, aggregation assays are generally prone to poor reproducibility due to the stochastic nature of fibril nucleation and the multiplicity of modulating factors. Here we present a simple and reproducible protocol to study the aggregation of α-synuclein in a plate-reader based assay.
Collapse
Affiliation(s)
- Michael M Wördehoff
- Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany
| | - Wolfgang Hoyer
- Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany.,Institute of Complex Systems (ICS-6), Structural Biochemistry, Research Centre Jülich, 52425 Jülich, Germany
| |
Collapse
|
16
|
Thioflavin T fluorescence to analyse amyloid formation kinetics: Measurement frequency as a factor explaining irreproducibility. Anal Biochem 2017. [DOI: 10.1016/j.ab.2017.06.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
17
|
Fernandes L, Moraes N, Sagrillo FS, Magalhães AV, de Moraes MC, Romão L, Kelly JW, Foguel D, Grimster NP, Palhano FL. An ortho-Iminoquinone Compound Reacts with Lysine Inhibiting Aggregation while Remodeling Mature Amyloid Fibrils. ACS Chem Neurosci 2017; 8:1704-1712. [PMID: 28425704 DOI: 10.1021/acschemneuro.7b00017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Protein aggregation is a hallmark of several neurodegenerative diseases, including Alzheimer's and Parkinson's diseases. It has been shown that lysine residues play a key role in the formation of these aggregates. Thus, the ability to disrupt aggregate formation by covalently modifying lysine residues could lead to the discovery of therapeutically relevant antiamyloidogenesis compounds. Herein, we demonstrate that an ortho-iminoquinone (IQ) can be utilized to inhibit amyloid aggregation. Using alpha-synuclein and Aβ1-40 as model amyloidogenic proteins, we observed that IQ was able to react with lysine residues and reduce amyloid aggregation. We also observed that IQ reacted with free amines within the amyloid fibrils preventing their dissociation and seeding capacity.
Collapse
Affiliation(s)
- Luiza Fernandes
- Instituto
de Bioquímica Médica Leopoldo de Meis, Programa de Biologia
Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-590, Brazil
| | - Nathalia Moraes
- Instituto
de Bioquímica Médica Leopoldo de Meis, Programa de Biologia
Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-590, Brazil
| | - Fernanda S. Sagrillo
- Department
of Organic Chemistry, Chemistry Institute, Fluminense Federal University, Niteroi, Rio de Janeiro 24020-141, Brazil
| | - Augusto V. Magalhães
- Instituto
de Bioquímica Médica Leopoldo de Meis, Programa de Biologia
Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-590, Brazil
| | - Marcela C. de Moraes
- Department
of Organic Chemistry, Chemistry Institute, Fluminense Federal University, Niteroi, Rio de Janeiro 24020-141, Brazil
| | - Luciana Romão
- Universidade Federal do Rio de Janeiro, Pólo
de Xerém, Duque de Caxias, Rio de Janeiro 25245-390, Brazil
| | - Jeffery W. Kelly
- Departments
of Chemistry and Molecular Medicine and the Skaggs Institute for Chemical
Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Debora Foguel
- Instituto
de Bioquímica Médica Leopoldo de Meis, Programa de Biologia
Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-590, Brazil
| | - Neil P. Grimster
- Departments
of Chemistry and Molecular Medicine and the Skaggs Institute for Chemical
Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Fernando L. Palhano
- Instituto
de Bioquímica Médica Leopoldo de Meis, Programa de Biologia
Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-590, Brazil
| |
Collapse
|
18
|
Jayamani J, Shanmugam G. Diameter of the vial plays a crucial role in the amyloid fibril formation: Role of interface area between hydrophilic-hydrophobic surfaces. Int J Biol Macromol 2017; 101:290-298. [DOI: 10.1016/j.ijbiomac.2017.03.070] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 03/03/2017] [Accepted: 03/14/2017] [Indexed: 12/29/2022]
|
19
|
Baker JD, Shelton LB, Zheng D, Favretto F, Nordhues BA, Darling A, Sullivan LE, Sun Z, Solanki PK, Martin MD, Suntharalingam A, Sabbagh JJ, Becker S, Mandelkow E, Uversky VN, Zweckstetter M, Dickey CA, Koren J, Blair LJ. Human cyclophilin 40 unravels neurotoxic amyloids. PLoS Biol 2017; 15:e2001336. [PMID: 28654636 PMCID: PMC5486962 DOI: 10.1371/journal.pbio.2001336] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 05/23/2017] [Indexed: 01/13/2023] Open
Abstract
The accumulation of amyloidogenic proteins is a pathological hallmark of neurodegenerative disorders. The aberrant accumulation of the microtubule associating protein tau (MAPT, tau) into toxic oligomers and amyloid deposits is a primary pathology in tauopathies, the most common of which is Alzheimer's disease (AD). Intrinsically disordered proteins, like tau, are enriched with proline residues that regulate both secondary structure and aggregation propensity. The orientation of proline residues is regulated by cis/trans peptidyl-prolyl isomerases (PPIases). Here we show that cyclophilin 40 (CyP40), a PPIase, dissolves tau amyloids in vitro. Additionally, CyP40 ameliorated silver-positive and oligomeric tau species in a mouse model of tau accumulation, preserving neuronal health and cognition. Nuclear magnetic resonance (NMR) revealed that CyP40 interacts with tau at sites rich in proline residues. CyP40 was also able to interact with and disaggregate other aggregating proteins that contain prolines. Moreover, CyP40 lacking PPIase activity prevented its capacity for disaggregation in vitro. Finally, we describe a unique structural property of CyP40 that may permit disaggregation to occur in an energy-independent manner. This study identifies a novel human protein disaggregase and, for the first time, demonstrates its capacity to dissolve intracellular amyloids.
Collapse
Affiliation(s)
- Jeremy D. Baker
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - Lindsey B. Shelton
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - Dali Zheng
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
| | - Filippo Favretto
- German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Bryce A. Nordhues
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - April Darling
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - Leia E. Sullivan
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
| | - Zheying Sun
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
| | - Parth K. Solanki
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
| | - Mackenzie D. Martin
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - Amirthaa Suntharalingam
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
| | - Jonathan J. Sabbagh
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - Stefan Becker
- Department for NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Eckhard Mandelkow
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
- CAESAR Research Center, Bonn, Germany
- MPI for Metabolism Research, Hamburg, Germany
| | - Vladimir N. Uversky
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
| | - Markus Zweckstetter
- German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
- Department for NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
- Department of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Chad A. Dickey
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - John Koren
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - Laura J. Blair
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| |
Collapse
|
20
|
Morgan GJ, Kelly JW. The Kinetic Stability of a Full-Length Antibody Light Chain Dimer Determines whether Endoproteolysis Can Release Amyloidogenic Variable Domains. J Mol Biol 2016; 428:4280-4297. [PMID: 27569045 DOI: 10.1016/j.jmb.2016.08.021] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 07/29/2016] [Accepted: 08/21/2016] [Indexed: 12/17/2022]
Abstract
Light chain (LC) amyloidosis (AL amyloidosis) appears to be caused by the misfolding, or misfolding and aggregation of an antibody LC or fragment thereof and is fatal if untreated. LCs are secreted from clonally expanded plasma cells, generally as disulfide-linked dimers, with each monomer comprising one constant and one variable domain. The energetic contribution of each domain and the role of endoproteolysis in AL amyloidosis remain unclear. To investigate why only some LCs form amyloid and cause organ toxicity, we measured the aggregation propensity and kinetic stability of LC dimers and their associated variable domains from AL amyloidosis patients and non-patients. All the variable domains studied readily form amyloid fibrils, whereas none of the full-length LC dimers, even those from AL amyloidosis patients, are amyloidogenic. Kinetic stability-that is, the free energy difference between the native state and the unfolding transition state-dictates the LC's unfolding rate. Full-length LC dimers derived from AL amyloidosis patients unfold more rapidly than other full-length LC dimers and can be readily cleaved into their component domains by proteases, whereas non-amyloidogenic LC dimers are more kinetically stable and resistant to endoproteolysis. Our data suggest that amyloidogenic LC dimers are kinetically unstable (unfold faster) and are thus susceptible to endoproteolysis that results in the release amyloidogenic LC fragments, whereas other LCs are not as amenable to unfolding and endoproteolysis and are therefore aggregation resistant. Pharmacologic kinetic stabilization of the full-length LC dimer could be a useful strategy to treat AL amyloidosis.
Collapse
Affiliation(s)
- Gareth J Morgan
- Departments of Chemistry and Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Jeffery W Kelly
- Departments of Chemistry and Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA; The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.
| |
Collapse
|
21
|
Orrú CD, Hughson AG, Groveman BR, Campbell KJ, Anson KJ, Manca M, Kraus A, Caughey B. Factors That Improve RT-QuIC Detection of Prion Seeding Activity. Viruses 2016; 8:E140. [PMID: 27223300 PMCID: PMC4885095 DOI: 10.3390/v8050140] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 05/09/2016] [Accepted: 05/12/2016] [Indexed: 12/14/2022] Open
Abstract
Rapid and sensitive detection of prions is important in managing prion diseases. The real-time quaking-induced conversion (RT-QuIC) assay for prion seeding activity has been applied to many prion diseases and provides for specific antemortem diagnostic testing. We evaluated RT-QuIC's long-term consistency and varied multiple reaction parameters. Repeated assays of a single scrapie sample using multiple plate readers and recombinant prion protein (rPrP(Sen)) substrates gave comparable results. N-terminal truncated hamster rPrP(Sen) (residues 90-231) hastened both prion-seeded and prion-independent reactions but maintained a clear kinetic distinction between the two. Raising temperatures or shaking speeds accelerated RT-QuIC reactions without compromising specificity. When applied to nasal brushings from Creutzfeldt-Jakob disease patients, higher temperatures accelerated RT-QuIC kinetics, and the use of hamster rPrP(Sen) (90-231) strengthened RT-QuIC responses. Elongation of shaking periods reduced scrapie-seeded reaction times, but continuous shaking promoted false-positive reactions. Furthermore, pH 7.4 provided for more rapid RT-QuIC reactions than more acidic pHs. Additionally, we show that small variations in the amount of sodium dodecyl sulfate (SDS) significantly impacted the assay. Finally, RT-QuIC performed in multiplate thermoshakers followed by fluorescence readings in separate plate readers enhanced assay throughput economically. Collectively, these results demonstrate improved speed, efficacy and practicality of RT-QuIC assays and highlight variables to be optimized for future applications.
Collapse
Affiliation(s)
- Christina D Orrú
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute for Allergy and Infectious Diseases, National Institutes of Health, Hamilton, 59840 MT, USA.
| | - Andrew G Hughson
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute for Allergy and Infectious Diseases, National Institutes of Health, Hamilton, 59840 MT, USA.
| | - Bradley R Groveman
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute for Allergy and Infectious Diseases, National Institutes of Health, Hamilton, 59840 MT, USA.
| | - Katrina J Campbell
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute for Allergy and Infectious Diseases, National Institutes of Health, Hamilton, 59840 MT, USA.
| | - Kelsie J Anson
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute for Allergy and Infectious Diseases, National Institutes of Health, Hamilton, 59840 MT, USA.
| | - Matteo Manca
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute for Allergy and Infectious Diseases, National Institutes of Health, Hamilton, 59840 MT, USA.
| | - Allison Kraus
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute for Allergy and Infectious Diseases, National Institutes of Health, Hamilton, 59840 MT, USA.
| | - Byron Caughey
- Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute for Allergy and Infectious Diseases, National Institutes of Health, Hamilton, 59840 MT, USA.
| |
Collapse
|
22
|
Nillegoda NB, Bukau B. Metazoan Hsp70-based protein disaggregases: emergence and mechanisms. Front Mol Biosci 2015; 2:57. [PMID: 26501065 PMCID: PMC4598581 DOI: 10.3389/fmolb.2015.00057] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 09/22/2015] [Indexed: 11/13/2022] Open
Abstract
Proteotoxic stresses and aging cause breakdown of cellular protein homeostasis, allowing misfolded proteins to form aggregates, which dedicated molecular machines have evolved to solubilize. In bacteria, fungi, protozoa and plants protein disaggregation involves an Hsp70•J-protein chaperone system, which loads and activates a powerful AAA+ ATPase (Hsp100) disaggregase onto protein aggregate substrates. Metazoans lack cytosolic and nuclear Hsp100 disaggregases but still eliminate protein aggregates. This longstanding puzzle of protein quality control is now resolved. Robust protein disaggregation activity recently shown for the metazoan Hsp70-based disaggregases relies instead on a crucial cooperation between two J-protein classes and interaction with the Hsp110 co-chaperone. An expanding multiplicity of Hsp70 and J-protein family members in metazoan cells facilitates different configurations of this Hsp70-based disaggregase allowing unprecedented versatility and specificity in protein disaggregation. Here we review the architecture, operation, and adaptability of the emerging metazoan disaggregation system and discuss how this evolved.
Collapse
Affiliation(s)
- Nadinath B Nillegoda
- Center for Molecular Biology (ZMBH) of the University of Heidelberg and German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance Heidelberg, Germany
| | - Bernd Bukau
- Center for Molecular Biology (ZMBH) of the University of Heidelberg and German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance Heidelberg, Germany
| |
Collapse
|
23
|
Nillegoda NB, Bukau B. Metazoan Hsp70-based protein disaggregases: emergence and mechanisms. Front Mol Biosci 2015; 2:57. [PMID: 26501065 DOI: 10.3389/fmolb.2015.00057/bibtex] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 09/22/2015] [Indexed: 05/25/2023] Open
Abstract
Proteotoxic stresses and aging cause breakdown of cellular protein homeostasis, allowing misfolded proteins to form aggregates, which dedicated molecular machines have evolved to solubilize. In bacteria, fungi, protozoa and plants protein disaggregation involves an Hsp70•J-protein chaperone system, which loads and activates a powerful AAA+ ATPase (Hsp100) disaggregase onto protein aggregate substrates. Metazoans lack cytosolic and nuclear Hsp100 disaggregases but still eliminate protein aggregates. This longstanding puzzle of protein quality control is now resolved. Robust protein disaggregation activity recently shown for the metazoan Hsp70-based disaggregases relies instead on a crucial cooperation between two J-protein classes and interaction with the Hsp110 co-chaperone. An expanding multiplicity of Hsp70 and J-protein family members in metazoan cells facilitates different configurations of this Hsp70-based disaggregase allowing unprecedented versatility and specificity in protein disaggregation. Here we review the architecture, operation, and adaptability of the emerging metazoan disaggregation system and discuss how this evolved.
Collapse
Affiliation(s)
- Nadinath B Nillegoda
- Center for Molecular Biology (ZMBH) of the University of Heidelberg and German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance Heidelberg, Germany
| | - Bernd Bukau
- Center for Molecular Biology (ZMBH) of the University of Heidelberg and German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance Heidelberg, Germany
| |
Collapse
|
24
|
Gao X, Carroni M, Nussbaum-Krammer C, Mogk A, Nillegoda NB, Szlachcic A, Guilbride DL, Saibil HR, Mayer MP, Bukau B. Human Hsp70 Disaggregase Reverses Parkinson's-Linked α-Synuclein Amyloid Fibrils. Mol Cell 2015; 59:781-93. [PMID: 26300264 PMCID: PMC5072489 DOI: 10.1016/j.molcel.2015.07.012] [Citation(s) in RCA: 268] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 06/26/2015] [Accepted: 07/16/2015] [Indexed: 01/14/2023]
Abstract
Intracellular amyloid fibrils linked to neurodegenerative disease typically accumulate in an age-related manner, suggesting inherent cellular capacity for counteracting amyloid formation in early life. Metazoan molecular chaperones assist native folding and block polymerization of amyloidogenic proteins, preempting amyloid fibril formation. Chaperone capacity for amyloid disassembly, however, is unclear. Here, we show that a specific combination of human Hsp70 disaggregase-associated chaperone components efficiently disassembles α-synuclein amyloid fibrils characteristic of Parkinson's disease in vitro. Specifically, the Hsc70 chaperone, the class B J-protein DNAJB1, and an Hsp110 family nucleotide exchange factor (NEF) provide ATP-dependent activity that disassembles amyloids within minutes via combined fibril fragmentation and depolymerization. This ultimately generates non-toxic α-synuclein monomers. Concerted, rapid interaction cycles of all three chaperone components with fibrils generate the power stroke required for disassembly. This identifies a powerful human Hsp70 disaggregase activity that efficiently disassembles amyloid fibrils and points to crucial yet undefined biology underlying amyloid-based diseases.
Collapse
Affiliation(s)
- Xuechao Gao
- Center for Molecular Biology of the University of Heidelberg (ZMBH), Im Neuenheimer Feld 282, 69120 Heidelberg, Germany; German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany
| | - Marta Carroni
- Department of Crystallography, Institute for Structural and Molecular Biology, Birkbeck College, Malet Street, London WC1E 7HX, UK
| | - Carmen Nussbaum-Krammer
- Center for Molecular Biology of the University of Heidelberg (ZMBH), Im Neuenheimer Feld 282, 69120 Heidelberg, Germany; German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany
| | - Axel Mogk
- Center for Molecular Biology of the University of Heidelberg (ZMBH), Im Neuenheimer Feld 282, 69120 Heidelberg, Germany; German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany
| | - Nadinath B Nillegoda
- Center for Molecular Biology of the University of Heidelberg (ZMBH), Im Neuenheimer Feld 282, 69120 Heidelberg, Germany; German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany
| | - Anna Szlachcic
- Center for Molecular Biology of the University of Heidelberg (ZMBH), Im Neuenheimer Feld 282, 69120 Heidelberg, Germany; German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany
| | - D Lys Guilbride
- ZMBH, DKFZ-ZMBH Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany
| | - Helen R Saibil
- Department of Crystallography, Institute for Structural and Molecular Biology, Birkbeck College, Malet Street, London WC1E 7HX, UK
| | - Matthias P Mayer
- ZMBH, DKFZ-ZMBH Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany
| | - Bernd Bukau
- Center for Molecular Biology of the University of Heidelberg (ZMBH), Im Neuenheimer Feld 282, 69120 Heidelberg, Germany; German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany.
| |
Collapse
|
25
|
Mokry DZ, Abrahão J, Ramos CH. Disaggregases, molecular chaperones that resolubilize protein aggregates. ACTA ACUST UNITED AC 2015; 87:1273-92. [DOI: 10.1590/0001-3765201520140671] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The process of folding is a seminal event in the life of a protein, as it is essential for proper protein function and therefore cell physiology. Inappropriate folding, or misfolding, can not only lead to loss of function, but also to the formation of protein aggregates, an insoluble association of polypeptides that harm cell physiology, either by themselves or in the process of formation. Several biological processes have evolved to prevent and eliminate the existence of non-functional and amyloidogenic aggregates, as they are associated with several human pathologies. Molecular chaperones and heat shock proteins are specialized in controlling the quality of the proteins in the cell, specifically by aiding proper folding, and dissolution and clearance of already formed protein aggregates. The latter is a function of disaggregases, mainly represented by the ClpB/Hsp104 subfamily of molecular chaperones, that are ubiquitous in all organisms but, surprisingly, have no orthologs in the cytosol of metazoan cells. This review aims to describe the characteristics of disaggregases and to discuss the function of yeast Hsp104, a disaggregase that is also involved in prion propagation and inheritance.
Collapse
Affiliation(s)
| | - Josielle Abrahão
- Universidade Estadual de Campinas, Brazil; Universidade Estadual de Campinas, Brazil
| | | |
Collapse
|
26
|
Kofanova OA, Mommaerts K, Betsou F. Tube Polypropylene: A Neglected Critical Parameter for Protein Adsorption During Biospecimen Storage. Biopreserv Biobank 2015; 13:296-8. [PMID: 26186497 DOI: 10.1089/bio.2014.0082] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This biospecimen research case study illustrates the importance of a neglected pre-analytical factor, the polypropylene type of storage tubes. We measured amyloid β1-42 peptide and showed that a non-irradiated, homopolymer type of polypropylene has the lowest adsorption properties.
Collapse
Affiliation(s)
- Olga A Kofanova
- Integrated Biobank of Luxembourg (IBBL) , Luxembourg, Luxembourg
| | | | - Fay Betsou
- Integrated Biobank of Luxembourg (IBBL) , Luxembourg, Luxembourg
| |
Collapse
|
27
|
Ladner-Keay CL, Griffith BJ, Wishart DS. Shaking alone induces de novo conversion of recombinant prion proteins to β-sheet rich oligomers and fibrils. PLoS One 2014; 9:e98753. [PMID: 24892647 PMCID: PMC4043794 DOI: 10.1371/journal.pone.0098753] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 05/07/2014] [Indexed: 11/29/2022] Open
Abstract
The formation of β-sheet rich prion oligomers and fibrils from native prion protein (PrP) is thought to be a key step in the development of prion diseases. Many methods are available to convert recombinant prion protein into β-sheet rich fibrils using various chemical denaturants (urea, SDS, GdnHCl), high temperature, phospholipids, or mildly acidic conditions (pH 4). Many of these methods also require shaking or another form of agitation to complete the conversion process. We have identified that shaking alone causes the conversion of recombinant PrP to β-sheet rich oligomers and fibrils at near physiological pH (pH 5.5 to pH 6.2) and temperature. This conversion does not require any denaturant, detergent, or any other chemical cofactor. Interestingly, this conversion does not occur when the water-air interface is eliminated in the shaken sample. We have analyzed shaking-induced conversion using circular dichroism, resolution enhanced native acidic gel electrophoresis (RENAGE), electron microscopy, Fourier transform infrared spectroscopy, thioflavin T fluorescence and proteinase K resistance. Our results show that shaking causes the formation of β-sheet rich oligomers with a population distribution ranging from octamers to dodecamers and that further shaking causes a transition to β-sheet fibrils. In addition, we show that shaking-induced conversion occurs for a wide range of full-length and truncated constructs of mouse, hamster and cervid prion proteins. We propose that this method of conversion provides a robust, reproducible and easily accessible model for scrapie-like amyloid formation, allowing the generation of milligram quantities of physiologically stable β-sheet rich oligomers and fibrils. These results may also have interesting implications regarding our understanding of prion conversion and propagation both within the brain and via techniques such as protein misfolding cyclic amplification (PMCA) and quaking induced conversion (QuIC).
Collapse
Affiliation(s)
- Carol L. Ladner-Keay
- Department of Computing Science, University of Alberta, Edmonton, Alberta, Canada
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
- National Institute for Nanotechnology, Edmonton, Alberta, Canada
| | - Bethany J. Griffith
- Department of Computing Science, University of Alberta, Edmonton, Alberta, Canada
- National Institute for Nanotechnology, Edmonton, Alberta, Canada
| | - David S. Wishart
- Department of Computing Science, University of Alberta, Edmonton, Alberta, Canada
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
- National Institute for Nanotechnology, Edmonton, Alberta, Canada
- * E-mail:
| |
Collapse
|
28
|
Duran-Aniotz C, Morales R, Moreno-Gonzalez I, Hu PP, Fedynyshyn J, Soto C. Aggregate-depleted brain fails to induce Aβ deposition in a mouse model of Alzheimer's disease. PLoS One 2014; 9:e89014. [PMID: 24533166 PMCID: PMC3923072 DOI: 10.1371/journal.pone.0089014] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Accepted: 01/13/2014] [Indexed: 11/19/2022] Open
Abstract
Recent studies in animal models of Alzheimer's disease (AD) show that amyloid-beta (Aβ) misfolding can be transmissible; however, the mechanisms by which this process occurs have not been fully explored. The goal of this study was to analyze whether depletion of aggregates from an AD brain suppresses its in vivo "seeding" capability. Removal of aggregates was performed by using the Aggregate Specific Reagent 1 (ASR1) compound which has been previously described to specifically bind misfolded species. Our results show that pre-treatment with ASR1-coupled magnetic beads reduces the in vivo misfolding inducing capability of an AD brain extract. These findings shed light respect to the active principle responsible for the prion-like spreading of Alzheimer's amyloid pathology and open the possibility of using seeds-capturing reagents as a promising target for AD treatment.
Collapse
Affiliation(s)
- Claudia Duran-Aniotz
- Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, University of Texas Houston Medical School, Houston, Texas, United States of America
- Universidad de los Andes, Facultad de Medicina, Santiago, Chile
| | - Rodrigo Morales
- Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, University of Texas Houston Medical School, Houston, Texas, United States of America
| | - Ines Moreno-Gonzalez
- Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, University of Texas Houston Medical School, Houston, Texas, United States of America
| | - Ping Ping Hu
- Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, University of Texas Houston Medical School, Houston, Texas, United States of America
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Life Sciences, Southwest University, Chongqing, China
| | - Joseph Fedynyshyn
- Novartis Vaccines and Diagnostics, Emeryville, California, United States of America
| | - Claudio Soto
- Mitchell Center for Alzheimer's Disease and Related Brain Disorders, Department of Neurology, University of Texas Houston Medical School, Houston, Texas, United States of America
| |
Collapse
|
29
|
Corrigendum. Protein Sci 2013. [DOI: 10.1002/pro.2366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
30
|
Corrigendum. Protein Sci 2013. [DOI: 10.1002/pro.2362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|