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Navale GR, Chauhan R, Saini S, Roy P, Ghosh K. Effect of cycloastragenol and punicalagin on Prp(106-126) and Aβ(25-35) oligomerization and fibrillizaton. Biophys Chem 2023; 302:107108. [PMID: 37734278 DOI: 10.1016/j.bpc.2023.107108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/01/2023] [Accepted: 09/12/2023] [Indexed: 09/23/2023]
Abstract
Numerous neurological disorders, including prion, Parkinson's, and Alzheimer's disease (AD), are identified as being caused by alterations in protein conformation, aggregation, and metal ion dyshomeostasis. Recent years have seen a significant increase in the exploration and study of natural products (NPs) from plant and microbial sources for their therapeutic potential against several diseases, including cancer, diabetes, cardiovascular disease, and neurodegenerative diseases. In this study, we have examined the effect of two NPs, cycloastragenol (CAG) and punicalagin (PCG), on the metal-induced oligomerization and aggregation of Aβ25-35 and PrP106-126 peptides. The peptide aggregation and inhibitory properties of both NPs were examined by the thioflavin-T (ThT) assay, MALDI-TOF, circular dichroism (CD) spectroscopy, and transmission electron microscopy (TEM). Among the two NPs, PCG significantly binds to the peptides, chelates metal ions (Cu2+ and Zn2+), inhibits peptide aggregation, substantially reduces oxidative stress, and controls the production of reactive oxygen species (ROS). Both NPs exhibited low cytotoxicity and prominently mitigated peptide-mediated cell cytotoxicity in hippocampal neuronal HT-22 cells by covalent bonding and hydrophobic interactions.
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Affiliation(s)
- Govinda R Navale
- Department of Chemistry, Indian Institute of Technology, Roorkee 247667, India
| | - Rahul Chauhan
- Department of Chemistry, Indian Institute of Technology, Roorkee 247667, India
| | - Saakshi Saini
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Roorkee 247667, India
| | - Partha Roy
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Roorkee 247667, India
| | - Kaushik Ghosh
- Department of Chemistry, Indian Institute of Technology, Roorkee 247667, India; Department of Biosciences and Bioengineering, Indian Institute of Technology, Roorkee 247667, India.
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Navale GR, Rana A, Saini S, Singh S, Saini R, Chaudhary VK, Roy P, Ghosh K. An efficient fluorescence chemosensor for sensing Zn(II) ions and applications in cell imaging and detection of Zn(II) induced aggregation of PrP(106–126) peptide. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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RAB7A GTPase Is Involved in Mitophagosome Formation and Autophagosome-Lysosome Fusion in N2a Cells Treated with the Prion Protein Fragment 106-126. Mol Neurobiol 2023; 60:1391-1407. [PMID: 36449254 DOI: 10.1007/s12035-022-03118-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 11/03/2022] [Indexed: 12/02/2022]
Abstract
Failed communication between mitochondria and lysosomes causes dysfunctional mitochondria, which may induce mitochondria-related neurodegenerative diseases. Here, we show that RAB7A, a small GTPase of the Rab family, mediates the crosstalk between these two important organelles to maintain homeostasis in N2a cells treated with PrP106-126. Specifically, we demonstrate that mitophagy deficiency in N2a cells caused by PrP106-126 is associated with dysregulated RAB7A localization in mitochondria. Cells lacking RAB7A display decreased mitochondrial colocalization with lysosomes and significantly increased mitochondrial protein expression, resulting in inhibited mitophagy. In contrast, overexpression of GTP-bound RAB7A directly induces lysosome colocalization with mitochondria. Further study revealed that GTP-bound RAB7A protects mitochondrial homeostasis by supporting autophagosome biogenesis. Moreover, we suggest that depletion of RAB7A leads to gross morphological changes in lysosomes, which prevents autophagosome-lysosome fusion and interferes with the breakdown of autophagic cargo within lysosomes. Overexpression of GTP-bound RAB7A can also alleviate PrP106-126-induced morphological damage and dysfunction of mitochondria, reducing neuronal apoptosis. Collectively, our data demonstrate that RAB7A successfully drives mitochondria to the autophagosomal lumen for degradation, suggesting that the communication of proteotoxic stress from mitochondria to lysosomes requires RAB7A, as a signaling molecule, to establish a link between the disturbed mitochondrial network and its remodeling. These findings indicate that small molecules regulating mitophagy have the potential to modulate cellular homeostasis and the clinical course of neurodegenerative diseases. Proposed model of mitophagy regulated by RAB7A. (1) Accumulating PrP106-126 induced mitophagy. (2) RAB7A is recruited to mitochondria. (3) ATG5-12 and ATG9A (5) vesicles are recruited to the autophagosome formation sites in a RAB7A-dependent manner. The ATG5-12 complex recruits and anchors LC3-I to form active LC3-II (4), accelerating mitophagosomal formation. The ATG9A vesicles are thought to be a source of membranes for autophagosome assembly. The recruitment of proteins and lipids induces membrane expansion and subsequent closure to form the mitophagosome. (6) Maintenance of the normal low lysosomal PH depends on active (GTP-bound) RAB7A. (7) RAB7A recruits effector molecules responsible for tight membrane interactions, and directly or indirectly, the subsequent autophagosome merges with the lysosome, and the cargo is completely degraded.
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Pereira LMB, Cali MP, Marchi RC, Pazin WM, Carlos RM. Luminescent imaging of insulin amyloid aggregation using a sensitive ruthenium-based probe in the red region. J Inorg Biochem 2021; 224:111585. [PMID: 34450412 DOI: 10.1016/j.jinorgbio.2021.111585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 08/13/2021] [Accepted: 08/15/2021] [Indexed: 10/20/2022]
Abstract
A sensitive and selective strategy to identify insulin fibrils remains a challenge for researchers in amyloid protein research. Thus, it is critical to detect, in vitro, the species generated during amyloid aggregation, particularly the fibrillar species. Here we demonstrate that the luminescent complex cis-[Ru(phen)2(3,4Apy)2]2+ (RuApy; phen = 1,10-phenanthroline; 3,4Apy = 3,4-diaminopyridine) is a rapid, low-cost alternative to in vitro detection of fibrillar insulin, using conventional optical techniques. The RuApy complex displays emission intensity enhancement at 655 nm when associated with insulin, which enables imaging of the conformational changes of the protein's self-aggregation. The complex shows high sensitivity to fibrillar insulin with a limit of detection of 0.85 μM and binding affinity of 12.40 ± 1.84 μM which is comparable to those of Thioflavin T and Congo red, with the advantage of minimizing background fluorescence, absorption of light by biomolecules, and light scattering from physiologic salts in the medium.
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Affiliation(s)
- Lorena M B Pereira
- Department of Chemistry, Universidade Federal de São Carlos, São Carlos, São Paulo 13565-905, Brazil
| | - Mariana P Cali
- Department of Chemistry, Universidade Federal de São Carlos, São Carlos, São Paulo 13565-905, Brazil
| | - Rafael C Marchi
- Department of Chemistry, Universidade Federal de São Carlos, São Carlos, São Paulo 13565-905, Brazil
| | - Wallance M Pazin
- Department of Physics, Universidade Estadual Paulista, Presidente Prudente, São Paulo 19060-900, Brazil
| | - Rose M Carlos
- Department of Chemistry, Universidade Federal de São Carlos, São Carlos, São Paulo 13565-905, Brazil.
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Sales TA, Prandi IG, Castro AAD, Leal DHS, Cunha EFFD, Kuca K, Ramalho TC. Recent Developments in Metal-Based Drugs and Chelating Agents for Neurodegenerative Diseases Treatments. Int J Mol Sci 2019; 20:ijms20081829. [PMID: 31013856 PMCID: PMC6514778 DOI: 10.3390/ijms20081829] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 04/07/2019] [Accepted: 04/09/2019] [Indexed: 02/07/2023] Open
Abstract
The brain has a unique biological complexity and is responsible for important functions in the human body, such as the command of cognitive and motor functions. Disruptive disorders that affect this organ, e.g. neurodegenerative diseases (NDDs), can lead to permanent damage, impairing the patients' quality of life and even causing death. In spite of their clinical diversity, these NDDs share common characteristics, such as the accumulation of specific proteins in the cells, the compromise of the metal ion homeostasis in the brain, among others. Despite considerable advances in understanding the mechanisms of these diseases and advances in the development of treatments, these disorders remain uncured. Considering the diversity of mechanisms that act in NDDs, a wide range of compounds have been developed to act by different means. Thus, promising compounds with contrasting properties, such as chelating agents and metal-based drugs have been proposed to act on different molecular targets as well as to contribute to the same goal, which is the treatment of NDDs. This review seeks to discuss the different roles and recent developments of metal-based drugs, such as metal complexes and metal chelating agents as a proposal for the treatment of NDDs.
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Affiliation(s)
- Thais A Sales
- Laboratory of Molecular Modeling, Department of Chemistry, Federal University of Lavras, Lavras/MG, 37200-000, Brazil.
| | - Ingrid G Prandi
- Laboratory of Molecular Modeling, Department of Chemistry, Federal University of Lavras, Lavras/MG, 37200-000, Brazil.
| | - Alexandre A de Castro
- Laboratory of Molecular Modeling, Department of Chemistry, Federal University of Lavras, Lavras/MG, 37200-000, Brazil.
| | - Daniel H S Leal
- Department of Health Sciences, Federal University of Espírito Santo, São Mateus/ES, 29932-540, Brazil.
| | - Elaine F F da Cunha
- Laboratory of Molecular Modeling, Department of Chemistry, Federal University of Lavras, Lavras/MG, 37200-000, Brazil.
| | - Kamil Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, 500 03, Czech Republic..
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, 500 03 Czech Republic.
| | - Teodorico C Ramalho
- Laboratory of Molecular Modeling, Department of Chemistry, Federal University of Lavras, Lavras/MG, 37200-000, Brazil.
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, 500 03, Czech Republic..
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Regulation of heteronuclear Pt–Ru complexes on the fibril formation and cytotoxicity of human islet amyloid polypeptide. J Inorg Biochem 2018; 189:7-16. [DOI: 10.1016/j.jinorgbio.2018.08.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 08/11/2018] [Accepted: 08/15/2018] [Indexed: 12/17/2022]
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Du W, Gong G, Wang W, Xu J. Regulation of the aggregation behavior of human islet amyloid polypeptide fragment by titanocene complexes. J Biol Inorg Chem 2017; 22:1065-1074. [DOI: 10.1007/s00775-017-1484-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 07/27/2017] [Indexed: 01/09/2023]
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Zhu D, Gong G, Wang W, Du W. Disaggregation of human islet amyloid polypeptide fibril formation by ruthenium polypyridyl complexes. J Inorg Biochem 2017; 170:109-116. [DOI: 10.1016/j.jinorgbio.2017.02.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 01/21/2017] [Accepted: 02/09/2017] [Indexed: 11/16/2022]
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Wang W, Zhao C, Zhu D, Gong G, Du W. Inhibition of amyloid peptide fibril formation by gold-sulfur complexes. J Inorg Biochem 2017; 171:1-9. [PMID: 28282581 DOI: 10.1016/j.jinorgbio.2017.02.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 02/18/2017] [Accepted: 02/20/2017] [Indexed: 12/16/2022]
Abstract
Amyloid-related diseases are characterized by protein conformational change and amyloid fibril deposition. Metal complexes are potential inhibitors of amyloidosis. Nitrogen-coordinated gold complexes have been used to disaggregate prion neuropeptide (PrP106-126) and human islet amyloid polypeptide (hIAPP). However, the roles of metal complexes in peptide fibril formation and related bioactivity require further exploration. In this work, we investigated the interactions of amyloid peptides PrP106-126 and hIAPP with two tetracoordinated gold-sulfur complexes, namely, dichloro diethyl dithiocarbamate gold complex and dichloro pyrrolidine dithiocarbamate gold complex. We also determined the effects of these complexes on peptide-induced cytotoxicity. Thioflavin T assay, morphological characterization, and particle size analysis indicated that the two gold-sulfur complexes effectively inhibited the fibrillation of the amyloid peptides, which led to the formation of nanoscale particles. The complexes reduced the cytotoxicity induced by the amyloid peptides. Intrinsic fluorescence, nuclear magnetic resonance, and mass spectrometry revealed that the complexes interacted with PrP106-126 and hIAPP via metal coordination and hydrophobic interaction, which improved the inhibition and binding of the two gold-sulfur compounds. Our study provided new insights into the use of tetracoordinated gold-sulfur complexes as drug candidates against protein conformational disorders.
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Affiliation(s)
- Wenji Wang
- Department of Chemistry, Renmin University of China, Beijing 100872, PR China
| | - Cong Zhao
- Department of Chemistry, Renmin University of China, Beijing 100872, PR China
| | - Dengsen Zhu
- Department of Chemistry, Renmin University of China, Beijing 100872, PR China
| | - Gehui Gong
- Department of Chemistry, Renmin University of China, Beijing 100872, PR China
| | - Weihong Du
- Department of Chemistry, Renmin University of China, Beijing 100872, PR China.
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Gong G, Wang W, Du W. Binuclear ruthenium complexes inhibit the fibril formation of human islet amyloid polypeptide. RSC Adv 2017. [DOI: 10.1039/c6ra28107a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Binuclear ruthenium complexes reverse the aggregation of human islet amyloid polypeptide.
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Affiliation(s)
- Gehui Gong
- Department of Chemistry
- Renmin University of China
- Beijing
- China
| | - Wenji Wang
- Department of Chemistry
- Renmin University of China
- Beijing
- China
| | - Weihong Du
- Department of Chemistry
- Renmin University of China
- Beijing
- China
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11
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Zhu D, Zhao C, Wang X, Wang W, Wang B, Du W. Roles of DMSO-type ruthenium complexes in disaggregation of prion neuropeptide PrP106–126. RSC Adv 2016. [DOI: 10.1039/c5ra21523d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
DMSO-type ruthenium complexes with aromatic ligands disaggregate the mature PrP106–126 fibrilsviametal coordination and hydrophobic interaction.
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Affiliation(s)
- Dengsen Zhu
- Department of Chemistry
- Renmin University of China
- Beijing
- China
| | - Cong Zhao
- Department of Chemistry
- Renmin University of China
- Beijing
- China
| | - Xuesong Wang
- Department of Chemistry
- Renmin University of China
- Beijing
- China
| | - Wenji Wang
- Department of Chemistry
- Renmin University of China
- Beijing
- China
| | - Baohuai Wang
- College of Chemistry and Molecular Engineering
- Peking University
- China
| | - Weihong Du
- Department of Chemistry
- Renmin University of China
- Beijing
- China
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12
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Effects of gold complexes on the assembly behavior of human islet amyloid polypeptide. J Inorg Biochem 2015; 152:114-22. [DOI: 10.1016/j.jinorgbio.2015.08.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 08/09/2015] [Accepted: 08/20/2015] [Indexed: 11/24/2022]
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Wang X, Zhu D, Zhao C, He L, Du W. Inhibitory effects of NAMI-A-like ruthenium complexes on prion neuropeptide fibril formation. Metallomics 2015; 7:837-46. [PMID: 25856332 DOI: 10.1039/c5mt00029g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Prion diseases are a group of infectious and fatal neurodegenerative disorders caused by the conformational conversion of a cellular prion protein (PrP) into its abnormal isoform PrP(Sc). PrP106-126 resembles PrP(Sc) in terms of physicochemical and biological characteristics and is used as a common model for the treatment of prion diseases. Inhibitory effects on fibril formation and neurotoxicity of the prion neuropeptide PrP106-126 have been investigated using metal complexes as potential inhibitors. Nevertheless, the binding mechanism between metal complexes and the peptide remains unclear. The present study is focused on the interaction of PrP106-126 with NAMI-A and NAMI-A-like ruthenium complexes, including KP418, KP1019, and KP1019-2. Results demonstrated that these ruthenium complexes could bind to PrP106-126 in a distinctive binding mode through electrostatic and hydrophobic interactions. NAMI-A-like ruthenium complexes can also effectively inhibit the aggregation and fibril formation of PrP106-126. The complex KP1019 demonstrated the optimal inhibitory ability upon peptide aggregation, and cytotoxicity because of its large aromatic ligand contribution. The studied complexes could also regulate the copper redox chemistry of PrP106-126 and effectually inhibit the formation of reactive oxygen species. Given these findings, ruthenium complexes with relatively low cellular toxicity may be used to develop potential pharmaceutical products against prion diseases.
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Affiliation(s)
- Xuesong Wang
- Department of Chemistry, Renmin University of China, Beijing 100872, People's Republic of China.
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Wang X, Cui M, Zhao C, He L, Zhu D, Wang B, Du W. Regulation of aggregation behavior and neurotoxicity of prion neuropeptides by platinum complexes. Inorg Chem 2014; 53:5044-54. [PMID: 24787240 DOI: 10.1021/ic500092t] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Prion diseases belong to a group of infectious, fatal neurodegenerative disorders. The conformational conversion of a cellular prion protein (PrP(C)) into an abnormal misfolded isoform (PrP(Sc)) is the key event in prion disease pathology. PrP106-126 resembles PrP(Sc) in some physicochemical and biological characteristics, such as apoptosis induction in neurons, fibrillar formation, and mediation of the conversion of native cellular PrP(C) to PrP(Sc). Numerous studies have been conducted to explore the inhibiting methods on the aggregation and neurotoxicity of prion neuropeptide PrP106-126. We showed that PrP106-126 aggregation, as assessed by fluorescence assay and atomic force microscopy, is inhibited by platinum complexes cisplatin, carboplatin, and Pt(bpy)Cl2. ESI-MS and NMR assessments of PrP106-126 and its mutant peptides demonstrate that platinum complexes bind to the peptides in coordination and nonbonded interactions, which rely on the ligand properties and the peptide sequence. In peptides, methionine residue is preferred as a potent binding site over histidine residue for the studied platinum complexes, implying a typical thiophile characteristic of platinum. The neurotoxicity induced by PrP106-126 is better inhibited by Pt(bpy)Cl2 and cisplatin. Furthermore, the ligand configuration contributes to both the binding affinity and the inhibition of peptide aggregation. The pursuit of novel platinum candidates that selectively target prion neuropeptide is noteworthy for medicinal inorganic chemistry and chemical biology.
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Affiliation(s)
- Xuesong Wang
- Department of Chemistry, Renmin University of China , Beijing 100872, People's Republic of China
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Hayne DJ, Lim S, Donnelly PS. Metal complexes designed to bind to amyloid-β for the diagnosis and treatment of Alzheimer's disease. Chem Soc Rev 2014; 43:6701-15. [PMID: 24671229 DOI: 10.1039/c4cs00026a] [Citation(s) in RCA: 124] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Alzheimer's disease is the most common form of age-related neurodegenerative dementia. The disease is characterised by the presence of plaques in the cerebral cortex. The major constituent of these plaques is aggregated amyloid-β peptide. This review focuses on the molecular aspects of metal complexes designed to bind to amyloid-β. The development of radioactive metal-based complexes of copper and technetium designed as diagnostic imaging agents to detect amyloid burden in the brain is discussed. Separate sections of the review discuss the use of luminescent metal complexes to act as non-conventional probes of amyloid formation and recent research into the use of metal complexes as inhibitors of amyloid formation and toxicity.
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Affiliation(s)
- David J Hayne
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, 3010, Australia.
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16
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Zhao C, Wang X, He L, Zhu D, Wang B, Du W. Influence of gold–bipyridyl derivants on aggregation and disaggregation of the prion neuropeptide PrP106–126. Metallomics 2014; 6:2117-25. [DOI: 10.1039/c4mt00219a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gold–bipyridyl derivants affect aggregation and disaggregation of a prion neuropeptide PrP106–126.
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Affiliation(s)
- Cong Zhao
- Department of Chemistry
- Renmin University of China
- Beijing, China
| | - Xuesong Wang
- Department of Chemistry
- Renmin University of China
- Beijing, China
| | - Lei He
- Department of Chemistry
- Renmin University of China
- Beijing, China
| | - Dengsen Zhu
- Department of Chemistry
- Renmin University of China
- Beijing, China
| | - Baohuai Wang
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing, China
| | - Weihong Du
- Department of Chemistry
- Renmin University of China
- Beijing, China
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