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Wiloch MZ, Baran N, Jonsson-Niedziolka M. The Influence of Coordination Mode on the Redox Properties of Copper Complexes with Aβ(3‐16) and its Pyroglutamate Counterpart pAβ(3‐16). ChemElectroChem 2022. [DOI: 10.1002/celc.202200623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Magdalena Z. Wiloch
- Institute of Physical Chemistry PAS: Polska Akademia Nauk Instytut Chemii Fizycznej Department of Electrode Processes POLAND
| | - Natalia Baran
- Institute of Physical Chemistry PAS: Polska Akademia Nauk Instytut Chemii Fizycznej Department of Electrode Processes POLAND
| | - Martin Jonsson-Niedziolka
- Institute of Physical Chemistry, PAS Department of electrode processes Kasprzaka 44/52 01-224 Warsaw POLAND
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2
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Kepp KP, Squitti R. Copper imbalance in Alzheimer’s disease: Convergence of the chemistry and the clinic. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.06.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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3
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His6, His13, and His14 residues in Aβ 1-40 peptide significantly and specifically affect oligomeric equilibria. Sci Rep 2019; 9:9449. [PMID: 31263161 PMCID: PMC6602940 DOI: 10.1038/s41598-019-45988-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 06/20/2019] [Indexed: 11/12/2022] Open
Abstract
Oligomers of Aβ peptide are implicated as the most probable causative agent in Alzheimer’s disease. However, their structural properties remain elusive due to the dynamic and heterogeneous character of oligomeric species coexisting in solution. Nevertheless, new approaches, mainly based on mass spectrometry, provide unique access to these different structural forms. Using these methods, we previously showed that the N-terminal, non-amyloidogenic region of Aβ is involved in the network of interactions specifically stabilizing oligomers. In the present study, we identified three histidine residues as active participants in this network. Detailed knowledge of the structural features that are potentially important for oligomer-mediated neurotoxicity is a prerequisite for the rational design of oligomerization modifiers.
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4
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Di Fede G, Giaccone G, Salmona M, Tagliavini F. Translational Research in Alzheimer's and Prion Diseases. J Alzheimers Dis 2019; 62:1247-1259. [PMID: 29172000 PMCID: PMC5869996 DOI: 10.3233/jad-170770] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Translational neuroscience integrates the knowledge derived by basic neuroscience with the development of new diagnostic and therapeutic tools that may be applied to clinical practice in neurological diseases. This information can be used to improve clinical trial designs and outcomes that will accelerate drug development, and to discover novel biomarkers which can be efficiently employed to early recognize neurological disorders and provide information regarding the effects of drugs on the underlying disease biology. Alzheimer’s disease (AD) and prion disease are two classes of neurodegenerative disorders characterized by incomplete knowledge of the molecular mechanisms underlying their occurrence and the lack of valid biomarkers and effective treatments. For these reasons, the design of therapies that prevent or delay the onset, slow the progression, or improve the symptoms associated to these disorders is urgently needed. During the last few decades, translational research provided a framework for advancing development of new diagnostic devices and promising disease-modifying therapies for patients with prion encephalopathies and AD. In this review, we provide present evidence of how supportive can be the translational approach to the study of dementias and show some results of our preclinical studies which have been translated to the clinical application following the ‘bed-to-bench-and-back’ research model.
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Affiliation(s)
- Giuseppe Di Fede
- IRCCS Foundation "Carlo Besta" Neurological Institute, Milan, Italy
| | - Giorgio Giaccone
- IRCCS Foundation "Carlo Besta" Neurological Institute, Milan, Italy
| | - Mario Salmona
- IRCCS Istituto di Ricerche Farmacologiche "Mario Negri", Milan, Italy
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5
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Shenberger Y, Marciano O, Gottlieb HE, Ruthstein S. Insights into the N-terminal Cu(II) and Cu(I) binding sites of the human copper transporter CTR1. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1492717] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Yulia Shenberger
- The Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Ortal Marciano
- The Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Hugo E. Gottlieb
- The Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Sharon Ruthstein
- The Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
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6
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Atrián-Blasco E, Gonzalez P, Santoro A, Alies B, Faller P, Hureau C. Cu and Zn coordination to amyloid peptides: From fascinating chemistry to debated pathological relevance. Coord Chem Rev 2018; 375:38-55. [PMID: 30262932 DOI: 10.1016/j.ccr.2018.04.007] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Several diseases share misfolding of different peptides and proteins as a key feature for their development. This is the case of important neurodegenerative diseases such as Alzheimer's and Parkinson's diseases and type II diabetes mellitus. Even more, metal ions such as copper and zinc might play an important role upon interaction with amyloidogenic peptides and proteins, which could impact their aggregation and toxicity abilities. In this review, the different coordination modes proposed for copper and zinc with amyloid-β, α-synuclein and IAPP will be reviewed as well as their impact on the aggregation, and ROS production in the case of copper. In addition, a special focus will be given to the mutations that affect metal binding and lead to familial cases of the diseases. Different modifications of the peptides that have been observed in vivo and could be relevant for the coordination of metal ions are also described.
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Affiliation(s)
- Elena Atrián-Blasco
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4, France
- University of Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
| | - Paulina Gonzalez
- Biometals and Biology Chemistry, Institut de Chimie (CNRS UMR7177), Université de Strasbourg, 4 rue B. Pascal, 67081 Strasbourg, France
- University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France
| | - Alice Santoro
- Biometals and Biology Chemistry, Institut de Chimie (CNRS UMR7177), Université de Strasbourg, 4 rue B. Pascal, 67081 Strasbourg, France
- University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France
| | - Bruno Alies
- Université de Bordeaux, ChemBioPharm INSERM U1212 CNRS UMR 5320, Bordeaux, France
| | - Peter Faller
- Biometals and Biology Chemistry, Institut de Chimie (CNRS UMR7177), Université de Strasbourg, 4 rue B. Pascal, 67081 Strasbourg, France
- University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France
| | - Christelle Hureau
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4, France
- University of Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
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7
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Cavallo G, Poyer S, Amalian J, Dufour F, Burel A, Carapito C, Charles L, Lutz J. Cleavable Binary Dyads: Simplifying Data Extraction and Increasing Storage Density in Digital Polymers. Angew Chem Int Ed Engl 2018; 57:6266-6269. [DOI: 10.1002/anie.201803027] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Indexed: 01/08/2023]
Affiliation(s)
- Gianni Cavallo
- Université de Strasbourg, CNRS Institut Charles Sadron UPR22 23 rue du Loess 67034 Strasbourg Cedex 2 France
| | - Salomé Poyer
- Aix-Marseille Univ., CNRS, UMR 7273 Institute of Radical Chemistry 13397 Marseille Cedex 20 France
| | - Jean‐Arthur Amalian
- Aix-Marseille Univ., CNRS, UMR 7273 Institute of Radical Chemistry 13397 Marseille Cedex 20 France
| | - Florent Dufour
- Université de Strasbourg, CNRS Institut Charles Sadron UPR22 23 rue du Loess 67034 Strasbourg Cedex 2 France
- Université de Strasbourg, CNRS Institut Pluridisciplinaire Hubert Curien UMR7178 25 Rue Becquerel 67087 Strasbourg France
| | - Alexandre Burel
- Université de Strasbourg, CNRS Institut Pluridisciplinaire Hubert Curien UMR7178 25 Rue Becquerel 67087 Strasbourg France
| | - Christine Carapito
- Université de Strasbourg, CNRS Institut Pluridisciplinaire Hubert Curien UMR7178 25 Rue Becquerel 67087 Strasbourg France
| | - Laurence Charles
- Aix-Marseille Univ., CNRS, UMR 7273 Institute of Radical Chemistry 13397 Marseille Cedex 20 France
| | - Jean‐François Lutz
- Université de Strasbourg, CNRS Institut Charles Sadron UPR22 23 rue du Loess 67034 Strasbourg Cedex 2 France
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8
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Cavallo G, Poyer S, Amalian J, Dufour F, Burel A, Carapito C, Charles L, Lutz J. Cleavable Binary Dyads: Simplifying Data Extraction and Increasing Storage Density in Digital Polymers. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803027] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Gianni Cavallo
- Université de Strasbourg, CNRS Institut Charles Sadron UPR22 23 rue du Loess 67034 Strasbourg Cedex 2 France
| | - Salomé Poyer
- Aix-Marseille Univ., CNRS, UMR 7273 Institute of Radical Chemistry 13397 Marseille Cedex 20 France
| | - Jean‐Arthur Amalian
- Aix-Marseille Univ., CNRS, UMR 7273 Institute of Radical Chemistry 13397 Marseille Cedex 20 France
| | - Florent Dufour
- Université de Strasbourg, CNRS Institut Charles Sadron UPR22 23 rue du Loess 67034 Strasbourg Cedex 2 France
- Université de Strasbourg, CNRS Institut Pluridisciplinaire Hubert Curien UMR7178 25 Rue Becquerel 67087 Strasbourg France
| | - Alexandre Burel
- Université de Strasbourg, CNRS Institut Pluridisciplinaire Hubert Curien UMR7178 25 Rue Becquerel 67087 Strasbourg France
| | - Christine Carapito
- Université de Strasbourg, CNRS Institut Pluridisciplinaire Hubert Curien UMR7178 25 Rue Becquerel 67087 Strasbourg France
| | - Laurence Charles
- Aix-Marseille Univ., CNRS, UMR 7273 Institute of Radical Chemistry 13397 Marseille Cedex 20 France
| | - Jean‐François Lutz
- Université de Strasbourg, CNRS Institut Charles Sadron UPR22 23 rue du Loess 67034 Strasbourg Cedex 2 France
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9
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Borghesani V, Alies B, Hureau C. Cu(II) binding to various forms of amyloid-β peptides. Are they friends or foes? Eur J Inorg Chem 2018; 2018:7-15. [PMID: 30186035 PMCID: PMC6120674 DOI: 10.1002/ejic.201700776] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Indexed: 01/25/2023]
Abstract
In the present micro-review, we describe the Cu(II) binding to several forms of amyloid-β peptides, the peptides involved in Alzheimer's disease. It has indeed been shown that in addition to the "full-length" peptide originating from the precursor protein after cleavage at position 1, several other shorter peptides do exist in large proportion and may be involved in the disease as well. Cu(II) binding to amyloid-β peptides is one of the key interactions that impact both the aggregating properties of the amyloid peptides and the Reactive Oxygen Species (ROS) production, two events linked to the etiology of the disease. Binding sites and affinity are described in correlation with Cu(II) induced ROS formation and Cu(II) altered aggregation, for amyloid peptides starting at position 1, 3, 4, 11 and for the corresponding pyroglutamate forms when they could be obtained (i.e. for peptides cleaved at positions 3 and 11). It appears that the current paradigm which points out a toxic role of the Cu(II) - amyloid-β interaction might well be shifted towards a possible protective role when the peptides considered are the N-terminally truncated ones.
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Affiliation(s)
- Valentina Borghesani
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4, France
- University of Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
| | | | - Christelle Hureau
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4, France
- University of Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
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10
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11
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Somavarapu AK, Shen F, Teilum K, Zhang J, Mossin S, Thulstrup PW, Bjerrum MJ, Tiwari MK, Szunyogh D, Søtofte PM, Kepp KP, Hemmingsen L. The Pathogenic A2V Mutant Exhibits Distinct Aggregation Kinetics, Metal Site Structure, and Metal Exchange of the Cu 2+ -Aβ Complex. Chemistry 2017; 23:13591-13595. [PMID: 28815875 DOI: 10.1002/chem.201703440] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Indexed: 12/29/2022]
Abstract
A prominent current hypothesis is that impaired metal ion homeostasis may contribute to Alzheimer's disease (AD). We elucidate the interaction of Cu2+ with wild-type (WT) Aβ1-40 and the genetic variants A2T and A2V which display increasing pathogenicity as A2T<WT<A2V. Cu2+ significantly extends the lag phase in aggregation kinetics, in particular for the pathogenic A2V variant. Additionally, a rapid, initial, low intensity ThT response is observed, possibly reflecting formation of Cu2+ induced amorphous aggregates, as supported by atomic force microscopy (AFM) and circular dichroism (CD) spectroscopy, again most notably for the A2V variant. Electron paramagnetic resonance (EPR) spectroscopy gives pKa values for transition between two Cu2+ coordination geometries (component I and II) of 7.4 (A2T), 7.9 (WT), and 8.4 (A2V), that is, component I is stabilized at physiological pH in the order A2T<WT<A2V. 1 H NMR relaxation exhibits the same trend for the non-coordinating aromatic residues (A2T<WT<A2V), and implies markedly faster inter-peptide Cu2+ exchange for the A2V variant than for WT and A2T. We therefore hypothesize that component I of the Cu-Aβ complex is related to pathogenicity, accounting for both the pathogenic nature of the A2V variant and the protective nature of the A2T variant.
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Affiliation(s)
- Arun K Somavarapu
- DTU Chemistry, Technical University of Denmark, 2800 Kongens, Lyngby, Denmark.,Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Fei Shen
- DTU Chemistry, Technical University of Denmark, 2800 Kongens, Lyngby, Denmark
| | - Kaare Teilum
- Structural Biology and NMR Laboratory and the Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, Ole Maaløes Vej 5, 2200, Copenhagen N, Denmark
| | - Jingdong Zhang
- DTU Chemistry, Technical University of Denmark, 2800 Kongens, Lyngby, Denmark
| | - Susanne Mossin
- DTU Chemistry, Technical University of Denmark, 2800 Kongens, Lyngby, Denmark
| | - Peter W Thulstrup
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Morten J Bjerrum
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Manish K Tiwari
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Daniel Szunyogh
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Peter M Søtofte
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Kasper P Kepp
- DTU Chemistry, Technical University of Denmark, 2800 Kongens, Lyngby, Denmark
| | - Lars Hemmingsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
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12
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Yang J, Zhang X, Zhu Y, Lenczowski E, Tian Y, Yang J, Zhang C, Hardt M, Qiao C, Tanzi RE, Moore A, Ye H, Ran C. The double-edged role of copper in the fate of amyloid beta in the presence of anti-oxidants. Chem Sci 2017; 8:6155-6164. [PMID: 28989646 PMCID: PMC5627602 DOI: 10.1039/c7sc01787a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 06/19/2017] [Indexed: 12/13/2022] Open
Abstract
The biological fate of amyloid beta (Aβ) species is a fundamental question in Alzheimer's disease (AD) pathogenesis. The competition between clearance and aggregation of Aβs is critical for the onset of AD. Copper has been widely considered to be an inducer of harmful crosslinking of Aβs, and an important triggering factor for the onset of AD. In this report, however, we present data to show that copper can also be an inducer of Aβ degradation in the presence of a large excess of well-known intrinsic (such as dopamine) or extrinsic (such as vitamin C) anti-oxidants. The degraded fragments were identified using SDS-Page gels, and validated via nanoLC-MS/MS. A tentative mechanism for the degradation was proposed and validated with model peptides. In addition, we performed electrophysiological analysis to investigate the synaptic functions in brain slices, and found that in the presence of a significant excess of vitamin C, Cu(ii) could prevent an Aβ-induced deficit in synaptic transmission in the hippocampus. Collectively, our evidence strongly indicated that a proper combination of copper and anti-oxidants might have a positive effect on the prevention of AD. This double-edged function of copper in AD has been largely overlooked in the past. We believe that our report is very important for fully understanding the function of copper in AD pathology.
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Affiliation(s)
- Jing Yang
- Molecular Imaging Laboratory , MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging , Department of Radiology , Massachusetts General Hospital , Harvard Medical School , Room 2301, Building 149, Charlestown , Boston , Massachusetts 02129 , USA . .,College of Pharmaceutical Sciences , Soochow University , Suzhou , 215006 , China
| | - Xueli Zhang
- Molecular Imaging Laboratory , MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging , Department of Radiology , Massachusetts General Hospital , Harvard Medical School , Room 2301, Building 149, Charlestown , Boston , Massachusetts 02129 , USA . .,Center for Drug Discovery , School of Pharmacy , China Pharmaceutical University , Nanjing , 210009 , China
| | - Yiying Zhu
- Department of Applied Oral Sciences , The Forsyth Institute , Cambridge , MA 02142 , USA
| | - Emily Lenczowski
- Department of Biology , Loyola University Chicago , Chicago , IL 60660 , USA .
| | - Yanli Tian
- Molecular Imaging Laboratory , MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging , Department of Radiology , Massachusetts General Hospital , Harvard Medical School , Room 2301, Building 149, Charlestown , Boston , Massachusetts 02129 , USA . .,Department of Parasitology , Zhongshan School of Medicine , Sun Yat-Sen University , Guangzhou , 510080 , China
| | - Jian Yang
- Molecular Imaging Laboratory , MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging , Department of Radiology , Massachusetts General Hospital , Harvard Medical School , Room 2301, Building 149, Charlestown , Boston , Massachusetts 02129 , USA . .,Center for Drug Discovery , School of Pharmacy , China Pharmaceutical University , Nanjing , 210009 , China
| | - Can Zhang
- Alzheimer's Disease Research Unit , Department of Neurology , Massachusetts General Hospital , Building 114 , Charlestown , Massachusetts 02129 , USA
| | - Markus Hardt
- Department of Applied Oral Sciences , The Forsyth Institute , Cambridge , MA 02142 , USA
| | - Chunhua Qiao
- College of Pharmaceutical Sciences , Soochow University , Suzhou , 215006 , China
| | - Rudolph E Tanzi
- Alzheimer's Disease Research Unit , Department of Neurology , Massachusetts General Hospital , Building 114 , Charlestown , Massachusetts 02129 , USA
| | - Anna Moore
- Molecular Imaging Laboratory , MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging , Department of Radiology , Massachusetts General Hospital , Harvard Medical School , Room 2301, Building 149, Charlestown , Boston , Massachusetts 02129 , USA .
| | - Hui Ye
- Department of Biology , Loyola University Chicago , Chicago , IL 60660 , USA .
| | - Chongzhao Ran
- Molecular Imaging Laboratory , MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging , Department of Radiology , Massachusetts General Hospital , Harvard Medical School , Room 2301, Building 149, Charlestown , Boston , Massachusetts 02129 , USA .
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13
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Gunn AP, Wong BX, Johanssen T, Griffith JC, Masters CL, Bush AI, Barnham KJ, Duce JA, Cherny RA. Amyloid-β Peptide Aβ3pE-42 Induces Lipid Peroxidation, Membrane Permeabilization, and Calcium Influx in Neurons. J Biol Chem 2015; 291:6134-45. [PMID: 26697885 DOI: 10.1074/jbc.m115.655183] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Indexed: 12/19/2022] Open
Abstract
Pyroglutamate-modified amyloid-β (pE-Aβ) is a highly neurotoxic amyloid-β (Aβ) isoform and is enriched in the brains of individuals with Alzheimer disease compared with healthy aged controls. Pyroglutamate formation increases the rate of Aβ oligomerization and alters the interactions of Aβ with Cu(2+) and lipids; however, a link between these properties and the toxicity of pE-Aβ peptides has not been established. We report here that Aβ3pE-42 has an enhanced capacity to cause lipid peroxidation in primary cortical mouse neurons compared with the full-length isoform (Aβ(1-42)). In contrast, Aβ(1-42) caused a significant elevation in cytosolic reactive oxygen species, whereas Aβ3pE-42 did not. We also report that Aβ3pE-42 preferentially associates with neuronal membranes and triggers Ca(2+) influx that can be partially blocked by the N-methyl-d-aspartate receptor antagonist MK-801. Aβ3pE-42 further caused a loss of plasma membrane integrity and remained bound to neurons at significantly higher levels than Aβ(1-42) over extended incubations. Pyroglutamate formation was additionally found to increase the relative efficiency of Aβ-dityrosine oligomer formation mediated by copper-redox cycling.
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Affiliation(s)
- Adam P Gunn
- From the Florey Institute of Neuroscience and Mental Health
| | - Bruce X Wong
- From the Florey Institute of Neuroscience and Mental Health
| | | | - James C Griffith
- Materials Characterisation and Fabrication Platform, University of Melbourne, Parkville, Melbourne 3010, Australia and
| | | | - Ashley I Bush
- From the Florey Institute of Neuroscience and Mental Health, Departments of Pathology and
| | - Kevin J Barnham
- From the Florey Institute of Neuroscience and Mental Health, Pharmacology and Therapeutics, and
| | - James A Duce
- From the Florey Institute of Neuroscience and Mental Health, Departments of Pathology and the School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, West Yorkshire LS2 9JT, United Kingdom
| | - Robert A Cherny
- From the Florey Institute of Neuroscience and Mental Health,
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14
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Zhang M, Hu R, Chen H, Chang Y, Ma J, Liang G, Mi J, Wang Y, Zheng J. Polymorphic cross-seeding amyloid assemblies of amyloid-β and human islet amyloid polypeptide. Phys Chem Chem Phys 2015; 17:23245-56. [PMID: 26283068 DOI: 10.1039/c5cp03329b] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Epidemiological studies have shown that the development of Alzheimer's disease (AD) is associated with type 2 diabetes (T2D), but it still remains unclear how AD and T2D are connected. Heterologous cross-seeding between the causative peptides of Aβ and hIAPP may represent a molecular link between AD and T2D. Here, we computationally modeled and simulated a series of cross-seeding double-layer assemblies formed by Aβ and hIAPP peptides using all-atom and coarse-gained molecular dynamics (MD) simulations. The cross-seeding Aβ-hIAPP assemblies showed a wide range of polymorphic structures via a combination of four β-sheet-to-β-sheet interfaces and two packing orientations, focusing on a comparison of different matches of β-sheet layers. Two cross-seeding Aβ-hIAPP assemblies with different interfacial β-sheet packings exhibited high structural stability and favorable interfacial interactions in both oligomeric and fibrillar states. Both Aβ-hIAPP assemblies displayed interfacial dehydration to different extents, which in turn promoted Aβ-hIAPP association depending on interfacial polarity and geometry. Furthermore, computational mutagenesis studies revealed that disruption of interfacial salt bridges largely disfavor the β-sheet-to-β-sheet association, highlighting the importance of salt bridges in the formation of cross-seeding assemblies. This work provides atomic-level information on the cross-seeding interactions between Aβ and hIAPP, which may be involved in the interplay between these two disorders.
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Affiliation(s)
- Mingzhen Zhang
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, USA.
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15
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Lai ZW, Gomez-Auli A, Keller EJ, Mayer B, Biniossek ML, Schilling O. Enrichment of protein N-termini by charge reversal of internal peptides. Proteomics 2015; 15:2470-8. [DOI: 10.1002/pmic.201500023] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 04/01/2015] [Accepted: 05/21/2015] [Indexed: 01/18/2023]
Affiliation(s)
- Zon W. Lai
- Institute of Molecular Medicine and Cell Research; University of Freiburg; Freiburg Germany
| | - Alejandro Gomez-Auli
- Institute of Molecular Medicine and Cell Research; University of Freiburg; Freiburg Germany
- Faculty of Biology; University of Freiburg; Freiburg Germany
- Spemann Graduate School of Biology and Medicine; University of Freiburg; Freiburg Germany
| | - Eva J. Keller
- Institute of Molecular Medicine and Cell Research; University of Freiburg; Freiburg Germany
| | - Bettina Mayer
- Institute of Molecular Medicine and Cell Research; University of Freiburg; Freiburg Germany
| | - Martin L. Biniossek
- Institute of Molecular Medicine and Cell Research; University of Freiburg; Freiburg Germany
| | - Oliver Schilling
- Institute of Molecular Medicine and Cell Research; University of Freiburg; Freiburg Germany
- Spemann Graduate School of Biology and Medicine; University of Freiburg; Freiburg Germany
- BIOSS Centre for Biological Signaling Studies; University of Freiburg; Freiburg Germany
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16
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Liao YH, Chen YR. A novel method for expression and purification of authentic amyloid-β with and without (15)N labels. Protein Expr Purif 2015; 113:63-71. [PMID: 25969353 DOI: 10.1016/j.pep.2015.05.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 05/03/2015] [Accepted: 05/04/2015] [Indexed: 01/22/2023]
Abstract
Amyloid-β (Aβ) is a major constituent in the senile plaques of patients with Alzheimer's disease (AD). Aβ has been intensively studied in amyloid research; however, challenges posed by data reproducibility arise from purity of synthetic Aβ and high expense for its isotope-labeling. The difficulties motivate development and optimization of recombinant Aβ (rAβ) production. Here, we report a new procedure to express and purify high quality rAβ40 from Escherichia coli. The new Aβ construct expressed insoluble Aβ fused with an N-terminal histidine-tag connected by a linker harboring TEV protease cut site. After purification and partial refolding, the fusion tag was removed by TEV protease cleavage, immobilized metal affinity chromatography (IMAC), and reversed phase-HPLC purification with a yield of 3.5 mg/L culture with and without (15)N label. The rAβ adopts classic amyloid fibrillization and is capable of binding to its clinical relevant metal ions.
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Affiliation(s)
- Yi-Hung Liao
- Genomics Research Center, Academia Sinica, 128, Academia Rd., Sec. 2, Nankang Dist., Taipei 115, Taiwan
| | - Yun-Ru Chen
- Genomics Research Center, Academia Sinica, 128, Academia Rd., Sec. 2, Nankang Dist., Taipei 115, Taiwan.
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17
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Drew SC. The N Terminus of α-Synuclein Forms CuII-Bridged Oligomers. Chemistry 2015; 21:7111-8. [DOI: 10.1002/chem.201500236] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Indexed: 12/31/2022]
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18
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Ryan TM, Kirby N, Mertens HDT, Roberts B, Barnham KJ, Cappai R, Pham CLL, Masters CL, Curtain CC. Small angle X-ray scattering analysis of Cu2+-induced oligomers of the Alzheimer's amyloid β peptide. Metallomics 2015; 7:536-43. [DOI: 10.1039/c4mt00323c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Research into causes of Alzheimer's disease and its treatment has produced a tantalising array of hypotheses about the role of transition metal dyshomeostasis, many of them on the interaction of these metals with the neurotoxic amyloid-β peptide (Aβ).
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Affiliation(s)
- Timothy M. Ryan
- University of Melbourne
- Florey Institute of Neuroscience and Mental Health
- Victoria 3010, Australia
| | - Nigel Kirby
- SAXS/WAXS Beamline
- The Australian Synchrotron
- Clayton, Australia
| | | | - Blaine Roberts
- University of Melbourne
- Florey Institute of Neuroscience and Mental Health
- Victoria 3010, Australia
| | - Kevin J. Barnham
- University of Melbourne
- Florey Institute of Neuroscience and Mental Health
- Victoria 3010, Australia
- Department of Pathology
- Bio21 Molecular Science and Technology Institute
| | - Roberto Cappai
- Department of Pathology
- Bio21 Molecular Science and Technology Institute
- The University of Melbourne
- Victoria, Australia
| | - Chi Le Lan Pham
- Department of Pathology
- Bio21 Molecular Science and Technology Institute
- The University of Melbourne
- Victoria, Australia
| | - Colin L. Masters
- University of Melbourne
- Florey Institute of Neuroscience and Mental Health
- Victoria 3010, Australia
| | - Cyril C. Curtain
- University of Melbourne
- Florey Institute of Neuroscience and Mental Health
- Victoria 3010, Australia
- Department of Pathology
- Bio21 Molecular Science and Technology Institute
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19
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Gomez-Castro CZ, Vela A, Quintanar L, Grande-Aztatzi R, Mineva T, Goursot A. Insights into the oxygen-based ligand of the low pH component of the Cu(2+)-amyloid-β complex. J Phys Chem B 2014; 118:10052-64. [PMID: 25090035 DOI: 10.1021/jp5047529] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In spite of significant experimental effort dedicated to the study of Cu(2+) binding to the amyloid beta (Aβ) peptide, involved in Alzheimer's disease, the nature of the oxygen-based ligand in the low pH component of the Cu(2+)-Aβ(1-16) complex is still under debate. This study reports density-functional-theory-based calculations that explore the potential energy surface of Cu(2+) complexes including N and O ligands at the N-terminus of the Aβ peptide, with a focus on evaluating the role of Asp1 carboxylate in copper coordination. Model conformers including 3, 6, and 17 amino acids have been used to systematically study several aspects of the Cu(2+)-coordination such as the Asp1 side chain conformation, local peptide backbone geometry, electrostatic and/or hydrogen bond interactions, and number and availability of Cu(2+) ligands. Our results show that the Asp1 peptide carbonyl binds to Cu(2+) only if the coordination number is less than four. In contrast, if four ligands are available, the most stable structures include the Asp1 carboxylate in equatorial position instead of the Asp1 carbonyl group. The two lowest energy Cu(2+)-Aβ(1-17) models involve Asp1 COO(-), the N-terminus, and His6 and His14 as equatorial ligands, with either a carbonyl or a water molecule in the axial position. These models are in good agreement with experimental data reported for component I of the Cu(2+)-Aβ(1-16) complex, including EXAFS- and X-ray-derived Cu(2+)-ligand distances, Cu(2+) EPR parameters, and (14)N and (13)C superhyperfine couplings. Our results suggest that at low pH, Cu(2+)-Aβ species with Asp1 carboxylate equatorial coordination coexist with species coordinating the Asp1 carbonyl. Understanding the bonding mechanism in these species is relevant to gain a deeper insight on the molecular processes involving copper-amyloid-β complexes, such as aggregation and redox activity.
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Affiliation(s)
- Carlos Z Gomez-Castro
- Departamento de Química, Cinvestav , Avenida Instituto Politécnico Nacional 2508, México D.F. 07360, México
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20
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Heffern MC, Velasco PT, Matosziuk LM, Coomes JL, Karras C, Ratner MA, Klein WB, Eckermann AL, Meade TJ. Modulation of amyloid-β aggregation by histidine-coordinating Cobalt(III) Schiff base complexes. Chembiochem 2014; 15:1584-9. [PMID: 24961930 PMCID: PMC4166533 DOI: 10.1002/cbic.201402201] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Indexed: 01/14/2023]
Abstract
Oligomers of the Aβ42 peptide are significant neurotoxins linked to Alzheimer's disease (AD). Histidine (His) residues present at the N terminus of Aβ42 are believed to influence toxicity by either serving as metal-ion binding sites (which promote oligomerization and oxidative damage) or facilitating synaptic binding. Transition metal complexes that bind to these residues and modulate Aβ toxicity have emerged as therapeutic candidates. Cobalt(III) Schiff base complexes (Co-sb) were evaluated for their ability to interact with Aβ peptides. HPLC-MS, NMR, fluorescence, and DFT studies demonstrated that Co-sb complexes could interact with the His residues in a truncated Aβ16 peptide representing the Aβ42 N terminus. Coordination of Co-sb complexes altered the structure of Aβ42 peptides and promoted the formation of large soluble oligomers. Interestingly, this structural perturbation of Aβ correlated to reduced synaptic binding to hippocampal neurons. These results demonstrate the promise of Co-sb complexes in anti-AD therapeutic approaches.
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Affiliation(s)
- Marie C. Heffern
- Departments of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, IL 60208-3113, USA
| | - Pauline T. Velasco
- Department of Neurobiology, Northwestern University, Evanston, IL 60208-3113, USA
| | - Lauren M. Matosziuk
- Departments of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, IL 60208-3113, USA
| | - Joseph L. Coomes
- Departments of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, IL 60208-3113, USA
| | - Constantine Karras
- Departments of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, IL 60208-3113, USA
| | - Mark A. Ratner
- Department of Chemistry, Northwestern University, Evanston, IL 60208-3113, USA
| | - William B. Klein
- Department of Neurobiology, Northwestern University, Evanston, IL 60208-3113, USA
| | - Amanda L. Eckermann
- Departments of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, IL 60208-3113, USA
| | - Thomas J. Meade
- Departments of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, IL 60208-3113, USA
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21
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Socher E, Sticht H, Horn AHC. The conformational stability of nonfibrillar amyloid-β peptide oligomers critically depends on the C-terminal peptide length. ACS Chem Neurosci 2014; 5:161-7. [PMID: 24494584 DOI: 10.1021/cn400208r] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
The amyloid-β (Aβ) peptide is one key molecule in the pathogenesis of Alzheimer's disease. We investigated the conformational stability of a nonfibrillar tetrameric Aβ structure by molecular dynamics (MD) simulations revealing that the stability of the Aβ tetramer depends critically on the C-terminal length. In contrast to the Aβ17-40 tetramer, which proved to be instable, the simulations demonstrate structural integrity of the Aβ17-42 and Aβ17-43 tetramers. These differences in stability can be attributed to an extension of the middle strand of a three-stranded antiparallel β sheet through residues 41-43, only present in the longer Aβ species that aggregate faster and are more neurotoxic. Additional MD simulations demonstrate that this higher stability is also present in the monomers forming the tetramer. In conclusion, our findings suggest the existence of a nonfibrillar oligomer topology that is significantly more stable for the longer Aβ species, thus offering a structural explanation for their higher neurotoxicity.
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Affiliation(s)
- Eileen Socher
- Bioinformatik,
Institut für Biochemie, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Fahrstraße 17, 91054 Erlangen, Germany
| | - Heinrich Sticht
- Bioinformatik,
Institut für Biochemie, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Fahrstraße 17, 91054 Erlangen, Germany
| | - Anselm H. C. Horn
- Bioinformatik,
Institut für Biochemie, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Fahrstraße 17, 91054 Erlangen, Germany
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22
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Ma G, Wang E, Wei H, Wei K, Zhu P, Liu Y. PtCl2(phen) disrupts the metal ions binding to amyloid-β peptide. Metallomics 2014; 5:879-87. [PMID: 23689733 DOI: 10.1039/c3mt20262c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Platinum phenanthroline complexes have been found to inhibit Aβ aggregation and reduce Aβ caused neurotoxicity. Our previous results revealed the synergistic roles of phenanthroline ligand and Pt(ii) coordination in the inhibition of Aβ aggregation. In this work, the reactions of PtCl2(phen) with metal bound Aβ complexes were investigated. HPLC results show that the copper coordination decreases the reaction rate of PtCl2(phen) with Aβ1-16 and influences the distribution of products on HPLC profiles. EPR results reveal that Cu(2+) remains coordinated to the Aβ peptide upon the binding of [Pt(phen)](2+), however, the Cu(2+) coordination sites are changed. The formation of bimetallic coordination complex [Pt(phen)+Aβ1-16+Cu(II)] was confirmed by ESI-MS. Tandem MS analysis shows that, similar to the reaction of apo-Aβ peptide, the His6/His14 chelation is also the preferred binding mode for [Pt(phen)](2+) in the presence of copper ions. EPR spectra suggest that the binding of [Pt(phen)](2+) alters the copper coordination from mode I to mode II in Aβ. Tandem MS analysis indicates that His13 and N-terminal amine could be involved in the Cu(2+) coordination in the bimetallic adduct. Similar results were observed in the reaction of Zn(2+) bound Aβ peptide, although the different zinc binding residues were detected in the bimetallic complex. These results indicate that the binding of platinum complex disturbs the most favorable coordination sphere of Cu(2+)/Zn(2+) and turns these metal ions to the secondary coordination site on Aβ. The release of Cu(2+)/Zn(2+) occurs at low pH. This result suggests that the binding of [Pt(phen)](2+) scaffold could interfere with the binding of Zn(2+) and Cu(2+) to Aβ, thus reducing the metal-induced Aβ aggregation and toxicity.
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Affiliation(s)
- Guolin Ma
- CAS Key Laboratory of Soft Matter Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, China
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23
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Ohkushi G, Suzuki N, Kobayashi S, Chikuma T. Axonal transport of neprilysin in rat sciatic nerves. J Mol Neurosci 2013; 53:96-102. [PMID: 24362764 DOI: 10.1007/s12031-013-0202-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Accepted: 12/02/2013] [Indexed: 12/24/2022]
Abstract
Axonal transport of neprilysin, a putative neuropeptide degrading-enzyme, was examined in the proximal, middle, and distal segments of rat sciatic nerves using a double ligation technique. Neprilysin activity was significantly increased not only in the proximal segment but also in the distal segment 12-120 h after ligation, and the maximal neprilysin activity was found in the proximal and distal segments at 96 and 72 h, respectively. Western blot analysis of neprilysin showed that its immunoreactivities in the proximal and distal segments were 2.8- and 2.4-fold higher than that in the middle segment, indicating that neprilysin is transported by anterograde and retrograde axonal flow. These observations suggest that neprilysin may be involved in the metabolism of neuropeptides in nerve terminals or synaptic clefts.
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Affiliation(s)
- Genki Ohkushi
- Department of Analytical Chemistry of Medicines, Showa Pharmaceutical University, 3-3165 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
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24
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Characterization of the polymorphic states of copper(II)-bound Aβ(1-16) peptides by computational simulations. J Comput Chem 2013; 34:2524-36. [DOI: 10.1002/jcc.23416] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 07/23/2013] [Accepted: 08/01/2013] [Indexed: 01/07/2023]
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25
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Targeting microglial K(ATP) channels to treat neurodegenerative diseases: a mitochondrial issue. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:194546. [PMID: 23844272 PMCID: PMC3697773 DOI: 10.1155/2013/194546] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 03/26/2013] [Accepted: 05/08/2013] [Indexed: 12/11/2022]
Abstract
Neurodegeneration is a complex process involving different cell types and neurotransmitters. A common characteristic of neurodegenerative disorders is the occurrence of a neuroinflammatory reaction in which cellular processes involving glial cells, mainly microglia and astrocytes, are activated in response to neuronal death. Microglia do not constitute a unique cell population but rather present a range of phenotypes closely related to the evolution of neurodegeneration. In a dynamic equilibrium with the lesion microenvironment, microglia phenotypes cover from a proinflammatory activation state to a neurotrophic one directly involved in cell repair and extracellular matrix remodeling. At each moment, the microglial phenotype is likely to depend on the diversity of signals from the environment and of its response capacity. As a consequence, microglia present a high energy demand, for which the mitochondria activity determines the microglia participation in the neurodegenerative process. As such, modulation of microglia activity by controlling microglia mitochondrial activity constitutes an innovative approach to interfere in the neurodegenerative process. In this review, we discuss the mitochondrial KATP channel as a new target to control microglia activity, avoid its toxic phenotype, and facilitate a positive disease outcome.
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26
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Kenche VB, Zawisza I, Masters CL, Bal W, Barnham KJ, Drew SC. Mixed Ligand Cu2+ Complexes of a Model Therapeutic with Alzheimer’s Amyloid-β Peptide and Monoamine Neurotransmitters. Inorg Chem 2013; 52:4303-18. [DOI: 10.1021/ic302289r] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Vijaya B. Kenche
- Mental Health
Research Institute, The University of Melbourne, Victoria 3010, Australia
- The Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
| | - Izabela Zawisza
- Institute of Biochemistry and
Biophysics, Polish Academy of Sciences,
Warsaw, Poland
| | - Colin L. Masters
- Mental Health
Research Institute, The University of Melbourne, Victoria 3010, Australia
| | - Wojciech Bal
- Institute of Biochemistry and
Biophysics, Polish Academy of Sciences,
Warsaw, Poland
| | - Kevin J. Barnham
- Mental Health
Research Institute, The University of Melbourne, Victoria 3010, Australia
- The Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
- Department
of Pharmacology, The University of Melbourne, Victoria 3010, Australia
| | - Simon C. Drew
- Mental Health
Research Institute, The University of Melbourne, Victoria 3010, Australia
- School of Physics, Monash University,
Victoria 3800, Australia
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27
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Good gene, bad gene: New APP variant may be both. Prog Neurobiol 2012; 99:281-92. [DOI: 10.1016/j.pneurobio.2012.06.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 05/23/2012] [Accepted: 06/11/2012] [Indexed: 01/01/2023]
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28
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Alies B, Bijani C, Sayen S, Guillon E, Faller P, Hureau C. Copper coordination to native N-terminally modified versus full-length amyloid-β: second-sphere effects determine the species present at physiological pH. Inorg Chem 2012; 51:12988-3000. [PMID: 23150940 DOI: 10.1021/ic302097d] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Alzheimer's disease is characterized by senile plaques in which metallic ions (copper, zinc, and iron) are colocalized with amyloid-β peptides of different sequences in aggregated forms. In addition to the full-length peptides (Aβ1-40/42), N-terminally truncated Aβ3-40/42 forms and their pyroglutamate counterparts, Aβp3-40/42, have been proposed to play key features in the aggregation process, leading to the senile plaques. Furthermore, they have been shown to be more toxic than the full-length Aβ, which made them central targets for therapeutic approaches. In order to better disentangle the possible role of metallic ions in the aggregation process, copper(II) coordination to the full-length amyloid peptides has been extensively studied in the last years. However, regarding the N-terminally modified forms at position 3, very little is known. Therefore, copper(I) and copper(II) coordination to those peptides have been investigated in the present report using a variety of complementary techniques and as a function of pH. Copper(I) coordination is not affected by the N-terminal modifications. In contrast, copper(II) coordination is different from that previously reported for the full-length peptide. In the case of the pyroglutamate form, this is due to preclusion of N-terminal amine binding. In the case of the N-terminally truncated form, alteration in copper(II) coordination is caused by second-sphere effects that impact the first binding shell and the pH-dependent repartition of the various [Cu(peptide)] complexes. Such second-sphere effects are anticipated to apply to a variety of metal ions and peptides, and their importance on changing the first binding shell has not been fully recognized yet.
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Affiliation(s)
- Bruno Alies
- Laboratoire de Chimie de Coordination (LCC), CNRS, 205 route de Narbonne, F-31077 Toulouse, France.
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29
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Hureau C, Dorlet P. Coordination of redox active metal ions to the amyloid precursor protein and to amyloid-β peptides involved in Alzheimer disease. Part 2: Dependence of Cu(II) binding sites with Aβ sequences. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.03.034] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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30
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Eskici G, Axelsen PH. Copper and Oxidative Stress in the Pathogenesis of Alzheimer’s Disease. Biochemistry 2012; 51:6289-311. [DOI: 10.1021/bi3006169] [Citation(s) in RCA: 204] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Gözde Eskici
- Departments of Pharmacology, Biochemistry and Biophysics,
and Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania 19104, United
States
| | - Paul H. Axelsen
- Departments of Pharmacology, Biochemistry and Biophysics,
and Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania 19104, United
States
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31
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Nalivaeva NN, Belyaev ND, Zhuravin IA, Turner AJ. The Alzheimer's amyloid-degrading peptidase, neprilysin: can we control it? Int J Alzheimers Dis 2012; 2012:383796. [PMID: 22900228 PMCID: PMC3412116 DOI: 10.1155/2012/383796] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Accepted: 06/01/2012] [Indexed: 02/07/2023] Open
Abstract
The amyloid cascade hypothesis of Alzheimer's disease (AD) postulates that accumulation in the brain of amyloid β-peptide (Aβ) is the primary trigger for neuronal loss specific to this pathology. In healthy brain, Aβ levels are regulated by a dynamic equilibrium between Aβ release from the amyloid precursor protein (APP) and its removal by perivascular drainage or by amyloid-degrading enzymes (ADEs). During the last decade, the ADE family was fast growing, and currently it embraces more than 20 members. There are solid data supporting involvement of each of them in Aβ clearance but a zinc metallopeptidase neprilysin (NEP) is considered as a major ADE. NEP plays an important role in brain function due to its role in terminating neuropeptide signalling and its decrease during ageing or after such pathologies as hypoxia or ischemia contribute significantly to the development of AD pathology. The recently discovered mechanism of epigenetic regulation of NEP by the APP intracellular domain (AICD) opens new avenues for its therapeutic manipulation and raises hope for developing preventive strategies in AD. However, consideration needs to be given to the diverse physiological roles of NEP. This paper critically evaluates general biochemical and physiological functions of NEP and their therapeutic relevance.
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Affiliation(s)
- N. N. Nalivaeva
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, RAS, 44 Thorez Avenue, Saint Petersburg 194223, Russia
| | - N. D. Belyaev
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
| | - I. A. Zhuravin
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, RAS, 44 Thorez Avenue, Saint Petersburg 194223, Russia
| | - A. J. Turner
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
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32
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Affiliation(s)
- Kasper P Kepp
- DTU Chemistry, Technical University of Denmark, DK 2800 Kongens Lyngby, Denmark.
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33
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Drew SC, Barnham KJ. The heterogeneous nature of Cu2+ interactions with Alzheimer's amyloid-β peptide. Acc Chem Res 2011; 44:1146-55. [PMID: 21714485 DOI: 10.1021/ar200014u] [Citation(s) in RCA: 144] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder characterized by progressive cognitive and memory impairment. Within the brain, senile plaques, which comprise extracellular deposits of the amyloid-β peptide (Aβ), are the most common pathological feature of AD. A high concentration of Cu(2+) is found within these plaques, which are also areas under oxidative stress. Laboratory work has shown that in vitro Aβ will react with Cu(2+) to induce peptide aggregation and the production of reactive oxygen species. As such, this interaction offers a possible explanation for two of the defining pathological features observed in the AD brain: the presence of amyloid plaques, which consist largely of insoluble Aβ aggregates, and the abundant oxidative stress therein. Researchers have accordingly put forth the "metals hypothesis" of AD, which postulates that compounds designed to inhibit Cu(2+)/Aβ interactions and redistribute Cu(2+) may offer therapeutic potential for treating AD. Characterization of the pH-dependent Cu(2+) coordination of Aβ is fundamental to understanding the neurological relevance of Cu(2+)/Aβ interactions and aiding the design of new therapeutic agents. In an effort to shed light on the problem, many experimental and theoretical techniques, using a variety of model systems, have been undertaken. The preceding decade has seen numerous conflicting spectroscopic reports concerning the nature of the Cu(2+)/Aβ coordination. As the number of studies has grown, the nature of the pH-dependent ligand environment surrounding the Cu(2+) cation has remained a point of contention. In large part, the difficulties can be attributed to inappropriate choices of the model system or to methods that are incapable of quantitatively delineating the presence and identity of multiple Cu(2+) coordination modes. Electron paramagnetic resonance (EPR) is the method of choice for studying paramagnetic metal-protein interactions. With the introduction of site-specific (15)N, (17)O, and (13)C isotopic labels and the application of advanced techniques, EPR is capable of eliminating much of the ambiguity. Recent EPR studies have produced the most definitive picture of the pH-dependent Cu(2+) coordination modes of Aβ and enabled researchers to address the inconsistencies present in the literature. In this Account, we begin by briefly introducing the evidence for a role of Cu(2+) in AD as well as the potential physiological and therapeutic implications of that role. We then outline the EPR methodology used to resolve the molecular details of the Cu(2+)/Aβ interactions. No drugs are currently available for altering the course of AD, and existing therapies only offer short-term symptomatic relief. This focused picture of the role of Cu(2+) in AD-related plaques offers welcome potential for the development of new methods to combat this devastating disease.
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Affiliation(s)
- Simon C. Drew
- Max Planck Institute for Bioinorganic Chemistry, 45470 Mülheim an der Ruhr, Germany
| | - Kevin J. Barnham
- Department of Pathology, The Bio21 Molecular Science and Biotechnology Institute, and the Mental Health Research Institute, The University of Melbourne, Victoria 3010, Australia
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34
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Jawhar S, Wirths O, Bayer TA. Pyroglutamate amyloid-β (Aβ): a hatchet man in Alzheimer disease. J Biol Chem 2011; 286:38825-32. [PMID: 21965666 DOI: 10.1074/jbc.r111.288308] [Citation(s) in RCA: 165] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Pyroglutamate-modified amyloid-β (Aβ(pE3)) peptides are gaining considerable attention as potential key participants in the pathology of Alzheimer disease (AD) due to their abundance in AD brain, high aggregation propensity, stability, and cellular toxicity. Transgenic mice that produce high levels of Aβ(pE3-42) show severe neuron loss. Recent in vitro and in vivo experiments have proven that the enzyme glutaminyl cyclase catalyzes the formation of Aβ(pE3). In this minireview, we summarize the current knowledge on Aβ(pE3), discussing its discovery, biochemical properties, molecular events determining formation, prevalence in the brains of AD patients, Alzheimer mouse models, and potential as a target for therapy and as a diagnostic marker.
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Affiliation(s)
- Sadim Jawhar
- Department of Molecular Psychiatry, Georg-August-University Göttingen, University Medicine Göttingen, 37075 Göttingen, Germany
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