1
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Drew SC. Chelator PBT2 Forms a Ternary Cu 2+ Complex with β-Amyloid That Has High Stability but Low Specificity. Int J Mol Sci 2023; 24:ijms24119267. [PMID: 37298218 DOI: 10.3390/ijms24119267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 05/18/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023] Open
Abstract
The metal chelator PBT2 (5,7-dichloro-2-[(dimethylamino)methyl]-8-hydroxyquinoline) acts as a terdentate ligand capable of forming binary and ternary Cu2+ complexes. It was clinically trialed as an Alzheimer's disease (AD) therapy but failed to progress beyond phase II. The β-amyloid (Aβ) peptide associated with AD was recently concluded to form a unique Cu(Aβ) complex that is inaccessible to PBT2. Herein, it is shown that the species ascribed to this binary Cu(Aβ) complex in fact corresponds to ternary Cu(PBT2)NImAβ complexes formed by the anchoring of Cu(PBT2) on imine nitrogen (NIm) donors of His side chains. The primary site of ternary complex formation is His6, with a conditional stepwise formation constant at pH 7.4 (Kc [M-1]) of logKc = 6.4 ± 0.1, and a second site is supplied by His13 or His14 (logKc = 4.4 ± 0.1). The stability of Cu(PBT2)NImH13/14 is comparable with that of the simplest Cu(PBT2)NIm complexes involving the NIm coordination of free imidazole (logKc = 4.22 ± 0.09) and histamine (logKc = 4.00 ± 0.05). The 100-fold larger formation constant for Cu(PBT2)NImH6 indicates that outer-sphere ligand-peptide interactions strongly stabilize its structure. Despite the relatively high stability of Cu(PBT2)NImH6, PBT2 is a promiscuous chelator capable of forming a ternary Cu(PBT2)NIm complex with any ligand containing an NIm donor. These ligands include histamine, L-His, and ubiquitous His side chains of peptides and proteins in the extracellular milieu, whose combined effect should outweigh that of a single Cu(PBT2)NImH6 complex regardless of its stability. We therefore conclude that PBT2 is capable of accessing Cu(Aβ) complexes with high stability but low specificity. The results have implications for future AD therapeutic strategies and understanding the role of PBT2 in the bulk transport of transition metal ions. Given the repurposing of PBT2 as a drug for breaking antibiotic resistance, ternary Cu(PBT2)NIm and analogous Zn(PBT2)NIm complexes may be relevant to its antimicrobial properties.
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Affiliation(s)
- Simon C Drew
- Brain-Immune Communication Lab, Institut Pasteur, Université Paris Cité, F-75015 Paris, France
- Department of Medicine (Royal Melbourne Hospital), The University of Melbourne, Victoria 3010, Australia
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2
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Summers KL, Roseman G, Schilling KM, Dolgova NV, Pushie MJ, Sokaras D, Kroll T, Harris HH, Millhauser GL, Pickering IJ, George GN. Alzheimer's Drug PBT2 Interacts with the Amyloid β 1-42 Peptide Differently than Other 8-Hydroxyquinoline Chelating Drugs. Inorg Chem 2022; 61:14626-14640. [PMID: 36073854 PMCID: PMC9957665 DOI: 10.1021/acs.inorgchem.2c01694] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Although Alzheimer's disease (AD) was first described over a century ago, it remains the leading cause of age-related dementia. Innumerable changes have been linked to the pathology of AD; however, there remains much discord regarding which might be the initial cause of the disease. The "amyloid cascade hypothesis" proposes that the amyloid β (Aβ) peptide is central to disease pathology, which is supported by elevated Aβ levels in the brain before the development of symptoms and correlations of amyloid burden with cognitive impairment. The "metals hypothesis" proposes a role for metal ions such as iron, copper, and zinc in the pathology of AD, which is supported by the accumulation of these metals within amyloid plaques in the brain. Metals have been shown to induce aggregation of Aβ, and metal ion chelators have been shown to reverse this reaction in vitro. 8-Hydroxyquinoline-based chelators showed early promise as anti-Alzheimer's drugs. Both 5-chloro-7-iodo-8-hydroxyquinoline (CQ) and 5,7-dichloro-2-[(dimethylamino)methyl]-8-hydroxyquinoline (PBT2) underwent unsuccessful clinical trials for the treatment of AD. To gain insight into the mechanism of action of 8HQs, we have investigated the potential interaction of CQ, PBT2, and 5,7-dibromo-8-hydroxyquinoline (B2Q) with Cu(II)-bound Aβ(1-42) using X-ray absorption spectroscopy (XAS), high energy resolution fluorescence detected (HERFD) XAS, and electron paramagnetic resonance (EPR). By XAS, we found CQ and B2Q sequestered ∼83% of the Cu(II) from Aβ(1-42), whereas PBT2 sequestered only ∼59% of the Cu(II) from Aβ(1-42), suggesting that CQ and B2Q have a higher relative Cu(II) affinity than PBT2. From our EPR, it became clear that PBT2 sequestered Cu(II) from a heterogeneous mixture of Cu(II)Aβ(1-42) species in solution, leaving a single Cu(II)Aβ(1-42) species. It follows that the Cu(II) site in this Cu(II)Aβ(1-42) species is inaccessible to PBT2 and may be less solvent-exposed than in other Cu(II)Aβ(1-42) species. We found no evidence to suggest that these 8HQs form ternary complexes with Cu(II)Aβ(1-42).
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Affiliation(s)
- Kelly L. Summers
- Molecular and Environmental Sciences Group, Department of Geological Sciences, College of Arts and Science, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
- Department of Chemistry, College of Arts and Science, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Graham Roseman
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
| | - Kevin M. Schilling
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
| | - Natalia V. Dolgova
- Molecular and Environmental Sciences Group, Department of Geological Sciences, College of Arts and Science, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
| | - M. Jake Pushie
- Department of Surgery, University of Saskatchewan, 103 Hospital Dr, Saskatoon, Saskatchewan S7N 0W8, Canada
| | - Dimosthenis Sokaras
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Thomas Kroll
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Hugh H. Harris
- Department of Chemistry, University of Adelaide, South Australia 5005, Australia
| | - Glenn L. Millhauser
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
| | - Ingrid J. Pickering
- Molecular and Environmental Sciences Group, Department of Geological Sciences, College of Arts and Science, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
- Department of Chemistry, College of Arts and Science, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Graham N. George
- Molecular and Environmental Sciences Group, Department of Geological Sciences, College of Arts and Science, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
- Department of Chemistry, College of Arts and Science, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
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3
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Bossak-Ahmad K, Bal W, Frączyk T, Drew SC. Ternary Cu 2+ Complexes of Human Serum Albumin and Glycyl-l-histidyl-l-lysine. Inorg Chem 2021; 60:16927-16931. [PMID: 34730942 DOI: 10.1021/acs.inorgchem.1c03084] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Human serum albumin (HSA) and the growth factor glycyl-l-histidyl-l-lysine (GHK) bind Cu2+ as part of their normal functions. GHK is found at its highest concentration in the albumin-rich fraction of plasma, leading to speculation that HSA and GHK form a ternary Cu2+ complex. Although preliminary evidence was presented 40 years ago, the structure and stability of such a complex have remained elusive. Here, we show that two ternary Cu(GHK)NImHSA complexes are formed between GHK and the imino nitrogen (NIm) of His side chains of HSA. We identified His3 as one site of ternary complex formation (conditional binding constant cKCu(GHK)NImHis3Cu(GHK) = 2900 M-1 at pH 7.4), with the second site (cKCu(GHK)NImHisXCu(GHK) = 1700 M-1) likely being supplied by either His128 or His510. Together with the established role of HSA as a molecular shuttle in the blood, these complexes may aid the transport of the exchangeable Cu2+ pool and the functional form of GHK.
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Affiliation(s)
- Karolina Bossak-Ahmad
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland
| | - Tomasz Frączyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland
| | - Simon C Drew
- Department of Medicine (Royal Melbourne Hospital), The University of Melbourne, Melbourne, Victoria 3010, Australia
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4
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Behar AE, Sabater L, Baskin M, Hureau C, Maayan G. A Water-Soluble Peptoid Chelator that Can Remove Cu 2+ from Amyloid-β Peptides and Stop the Formation of Reactive Oxygen Species Associated with Alzheimer's Disease. Angew Chem Int Ed Engl 2021; 60:24588-24597. [PMID: 34510664 DOI: 10.1002/anie.202109758] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/01/2021] [Indexed: 12/25/2022]
Abstract
Cu bound to amyloid-β (Aβ) peptides can act as a catalyst for the formation of reactive oxygen species (ROS), leading to neuropathologic degradation associated with Alzheimer's disease (AD). An excellent therapeutic approach is to use a chelator that can selectively remove Cu from Cu-Aβ. This chelator should compete with Zn2+ ions (Zn) that are present in the synaptic cleft while forming a nontoxic Cu complex. Herein we describe P3, a water-soluble peptidomimetic chelator that selectively removes Cu2+ from Cu-Aβ in the presence of Zn and prevent the formation of ROS even in a reductive environment. We demonstrate, based on extensive spectroscopic analysis, that although P3 extracts Zn from Cu,Zn-Aβ faster than it removes Cu, the formed Zn complexes are kinetic products that further dissociate, while CuP3 is formed as an exclusive stable thermodynamic product. Our unique findings, combined with the bioavailability of peptoids, make P3 an excellent drug candidate in the context of AD.
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Affiliation(s)
- Anastasia E Behar
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, 3200008, Haifa, Israel
| | - Laurent Sabater
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, 31077, Toulouse, France
| | - Maria Baskin
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, 3200008, Haifa, Israel
| | - Christelle Hureau
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, 31077, Toulouse, France.,Université de Toulouse, 31077, Toulouse, France
| | - Galia Maayan
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, 3200008, Haifa, Israel
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5
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Behar AE, Sabater L, Baskin M, Hureau C, Maayan G. A Water‐Soluble Peptoid Chelator that Can Remove Cu
2+
from Amyloid‐β Peptides and Stop the Formation of Reactive Oxygen Species Associated with Alzheimer's Disease. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anastasia E. Behar
- Schulich Faculty of Chemistry Technion—Israel Institute of Technology Technion City 3200008 Haifa Israel
| | - Laurent Sabater
- CNRS LCC (Laboratoire de Chimie de Coordination) 205 route de Narbonne 31077 Toulouse France
- Université de Toulouse 31077 Toulouse France
| | - Maria Baskin
- Schulich Faculty of Chemistry Technion—Israel Institute of Technology Technion City 3200008 Haifa Israel
| | - Christelle Hureau
- CNRS LCC (Laboratoire de Chimie de Coordination) 205 route de Narbonne 31077 Toulouse France
- Université de Toulouse 31077 Toulouse France
| | - Galia Maayan
- Schulich Faculty of Chemistry Technion—Israel Institute of Technology Technion City 3200008 Haifa Israel
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6
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Fasae KD, Abolaji AO, Faloye TR, Odunsi AY, Oyetayo BO, Enya JI, Rotimi JA, Akinyemi RO, Whitworth AJ, Aschner M. Metallobiology and therapeutic chelation of biometals (copper, zinc and iron) in Alzheimer's disease: Limitations, and current and future perspectives. J Trace Elem Med Biol 2021; 67:126779. [PMID: 34034029 DOI: 10.1016/j.jtemb.2021.126779] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 04/03/2021] [Accepted: 05/10/2021] [Indexed: 02/08/2023]
Abstract
BACKGROUND Alzheimer's disease (AD) is the most prevalent cause of cognitive impairment and dementia worldwide. The pathobiology of the disease has been studied in the form of several hypotheses, ranging from oxidative stress, amyloid-beta (Aβ) aggregation, accumulation of tau forming neurofibrillary tangles (NFT) through metal dysregulation and homeostasis, dysfunction of the cholinergic system, and to inflammatory and autophagic mechanism. However, none of these hypotheses has led to confirmed diagnostics or approved cure for the disease. OBJECTIVE This review is aimed as a basic and an encyclopedic short course into metals in AD and discusses the advances in chelation strategies and developments adopted in the treatment of the disease. Since there is accumulating evidence of the role of both biometal dyshomeostasis (iron (Fe), copper (Cu), and zinc (Zn)) and metal-amyloid interactions that lead to the pathogenesis of AD, this review focuses on unraveling therapeutic chelation strategies that have been considered in the treatment of the disease, aiming to sequester free and protein-bound metal ions and reducing cerebral metal burden. Promising compounds possessing chemically modified moieties evolving as multi-target ligands used as anti-AD drug candidates are also covered. RESULTS AND CONCLUSION Several multidirectional and multifaceted studies on metal chelation therapeutics show the need for improved synthesis, screening, and analysis of compounds to be able to effectively present chelating anti-AD drugs. Most drug candidates studied have limitations in their physicochemical properties; some enhance redistribution of metal ions, while others indirectly activate signaling pathways in AD. The metal chelation process in vivo still needs to be established and the design of potential anti-AD compounds that bi-functionally sequester metal ions as well as inhibit the Aβ aggregation by competing with the metal ions and reducing metal-induced oxidative damage and neurotoxicity may signal a bright end in chelation-based therapeutics of AD.
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Affiliation(s)
- Kehinde D Fasae
- Department of Biochemistry, Molecular Drug Metabolism and Toxicology Unit, College of Medicine, University of Ibadan, Nigeria
| | - Amos O Abolaji
- Department of Biochemistry, Molecular Drug Metabolism and Toxicology Unit, College of Medicine, University of Ibadan, Nigeria.
| | - Tolulope R Faloye
- Department of Biochemistry, Molecular Drug Metabolism and Toxicology Unit, College of Medicine, University of Ibadan, Nigeria
| | - Atinuke Y Odunsi
- Department of Biochemistry, Molecular Drug Metabolism and Toxicology Unit, College of Medicine, University of Ibadan, Nigeria
| | - Bolaji O Oyetayo
- Department of Pharmacology and Therapeutics, Neuropharmacology Unit, College of Medicine, University of Ibadan, Nigeria
| | - Joseph I Enya
- Department of Anatomy, University of Ilorin, Kwara State, Nigeria
| | - Joshua A Rotimi
- Department of Biochemistry and Molecular Biology, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Rufus O Akinyemi
- Neuroscience and Ageing Research Unit, Institute for Advanced Medical Research and Training, College of Medicine, University of Ibadan, Ibadan, Oyo State, Nigeria
| | | | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA.
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7
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The Aggregation Pattern of Aβ
1–40
is Altered by the Presence of
N
‐Truncated Aβ
4–40
and/or Cu
II
in a Similar Way through Ionic Interactions. Chemistry 2021; 27:2798-2809. [DOI: 10.1002/chem.202004484] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Indexed: 12/19/2022]
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8
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Wang X, Niu X, Zhang X, Zhang Z, Gao X, Wang W, Yuan Z. Construction of an AuHQ nano-sensitizer for enhanced radiotherapy efficacy through remolding tumor vasculature. J Mater Chem B 2021; 9:4365-4379. [PMID: 34013945 DOI: 10.1039/d1tb00515d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
As a radiotherapy sensitizer, gold-based nanomaterials can significantly enhance radiotherapy efficacy. However, the severe hypoxia and the low accumulation of nanomedicine at the tumor site caused by poor perfusion have seriously affected the effect of radiotherapy. Tumor vascular normalization has emerged as a new strategy for increasing the efficacy of radiotherapy due to its ability to relieve hypoxia and increase perfusion. However, a commonly used approach of blocking a single growth factor to induce vascular normalization is limited by the compensation effect of evasive drug resistance. In this work, we developed a strategy to simultaneously reduce the expression of multi-angiogenic growth factors by suppressing the oxidative stress effects in tumor. Herein, gold nanoparticles (Au NPs) were modified with 8-hydroxyquinoline (HQ) to obtain AuHQ. This system has a simple structure and could inhibit the production of reactive oxygen species in tumor cells by chelating iron ions, and attenuating the expression of angiopoietin-2, vascular endothelial growth factor and basic fibroblast growth factor in human umbilical vein endothelial cells. In vivo, AuHQ treatment increased pericyte coverage, modulated tumor leakage while alleviating tumor hypoxia and increased blood perfusion, thereby inducing tumor vascular normalization. Consequently, Au accumulation of the AuHQ group increased by 1.94 fold compared to that in the control group. Furthermore, the antitumor efficacy of radiotherapy was increased by 38% compared to the Au NPs-treated group. Therefore, AuHQ may be a promising nanomedicine for future cancer treatment.
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Affiliation(s)
- Xiaohui Wang
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Xiaoyan Niu
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Xiaolei Zhang
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Zhenjie Zhang
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Xuefeng Gao
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Wei Wang
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Zhi Yuan
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
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9
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Summers KL, Roseman GP, Sopasis GJ, Millhauser GL, Harris HH, Pickering IJ, George GN. Copper(II) Binding to PBT2 Differs from That of Other 8-Hydroxyquinoline Chelators: Implications for the Treatment of Neurodegenerative Protein Misfolding Diseases. Inorg Chem 2020; 59:17519-17534. [PMID: 33226796 PMCID: PMC7927943 DOI: 10.1021/acs.inorgchem.0c02754] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PBT2 (5,7-dichloro-2-[(dimethylamino)methyl]-8-hydroxyquinoline) is a small Cu(II)-binding drug that has been investigated in the treatment of neurodegenerative diseases, namely, Alzheimer's disease (AD). PBT2 is thought to be highly effective at crossing the blood-brain barrier and has been proposed to exert anti-Alzheimer's effects through the modulation of metal ion concentrations in the brain, specifically the sequestration of Cu(II) from amyloid plaques. However, despite promising initial results in animal models and in clinical trials where PBT2 was shown to improve cognitive function, larger-scale clinical trials did not find PBT2 to have a significant effect on the amyloid plaque burden compared with controls. We propose that the results of these clinical trials likely point to a more complex mechanism of action for PBT2 other than simple Cu(II) sequestration. To this end, herein we have investigated the solution chemistry of Cu(II) coordination by PBT2 primarily using X-ray absorption spectroscopy (XAS), high-energy-resolution fluorescence-detected XAS, and electron paramagnetic resonance. We propose that a novel bis-PBT2 Cu(II) complex with asymmetric coordination may coexist in solution with a symmetric four-coordinate Cu(II)-bis-PBT2 complex distorted from coplanarity. Additionally, PBT2 is a more flexible ligand than other 8HQs because it can act as both a bidentate and a tridentate ligand as well as coordinate Cu(II) in both 1:1 and 2:1 PBT2/Cu(II) complexes.
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Affiliation(s)
- Kelly L Summers
- Molecular and Environmental Sciences Group, Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Graham P Roseman
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
| | - George J Sopasis
- Department of Chemistry, University of Adelaide, South Australia 5005, Australia
| | - Glenn L Millhauser
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
| | - Hugh H Harris
- Department of Chemistry, University of Adelaide, South Australia 5005, Australia
| | - Ingrid J Pickering
- Molecular and Environmental Sciences Group, Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Graham N George
- Molecular and Environmental Sciences Group, Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
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10
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Drienovská I, Scheele RA, Gutiérrez de Souza C, Roelfes G. A Hydroxyquinoline-Based Unnatural Amino Acid for the Design of Novel Artificial Metalloenzymes. Chembiochem 2020; 21:3077-3081. [PMID: 32585070 PMCID: PMC7689906 DOI: 10.1002/cbic.202000306] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/25/2020] [Indexed: 11/11/2022]
Abstract
We have examined the potential of the noncanonical amino acid (8-hydroxyquinolin-3-yl)alanine (HQAla) for the design of artificial metalloenzymes. HQAla, a versatile chelator of late transition metals, was introduced into the lactococcal multidrug-resistance regulator (LmrR) by stop codon suppression methodology. LmrR_HQAla was shown to complex efficiently with three different metal ions, CuII , ZnII and RhIII to form unique artificial metalloenzymes. The catalytic potential of the CuII -bound LmrR_HQAla enzyme was shown through its ability to catalyse asymmetric Friedel-Craft alkylation and water addition, whereas the ZnII -coupled enzyme was shown to mimic natural Zn hydrolase activity.
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Affiliation(s)
- Ivana Drienovská
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| | - Remkes A. Scheele
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| | - Cora Gutiérrez de Souza
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| | - Gerard Roelfes
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747 AGGroningenThe Netherlands
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11
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12
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Ternary Cu(II) Complex with GHK Peptide and Cis-Urocanic Acid as a Potential Physiologically Functional Copper Chelate. Int J Mol Sci 2020; 21:ijms21176190. [PMID: 32867146 PMCID: PMC7503498 DOI: 10.3390/ijms21176190] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/19/2020] [Accepted: 08/25/2020] [Indexed: 01/06/2023] Open
Abstract
The tripeptide NH2–Gly–His–Lys–COOH (GHK), cis-urocanic acid (cis-UCA) and Cu(II) ions are physiological constituents of the human body and they co-occur (e.g., in the skin and the plasma). While GHK is known as Cu(II)-binding molecule, we found that urocanic acid also coordinates Cu(II) ions. Furthermore, both ligands create ternary Cu(II) complex being probably physiologically functional species. Regarding the natural concentrations of the studied molecules in some human tissues, together with the affinities reported here, we conclude that the ternary complex [GHK][Cu(II)][cis-urocanic acid] may be partly responsible for biological effects of GHK and urocanic acid described in the literature.
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13
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Wang L, Yin YL, Liu XZ, Shen P, Zheng YG, Lan XR, Lu CB, Wang JZ. Current understanding of metal ions in the pathogenesis of Alzheimer's disease. Transl Neurodegener 2020; 9:10. [PMID: 32266063 PMCID: PMC7119290 DOI: 10.1186/s40035-020-00189-z] [Citation(s) in RCA: 207] [Impact Index Per Article: 51.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 03/11/2020] [Indexed: 02/07/2023] Open
Abstract
Background The homeostasis of metal ions, such as iron, copper, zinc and calcium, in the brain is crucial for maintaining normal physiological functions. Studies have shown that imbalance of these metal ions in the brain is closely related to the onset and progression of Alzheimer's disease (AD), the most common neurodegenerative disorder in the elderly. Main body Erroneous deposition/distribution of the metal ions in different brain regions induces oxidative stress. The metal ions imbalance and oxidative stress together or independently promote amyloid-β (Aβ) overproduction by activating β- or γ-secretases and inhibiting α-secretase, it also causes tau hyperphosphorylation by activating protein kinases, such as glycogen synthase kinase-3β (GSK-3β), cyclin-dependent protein kinase-5 (CDK5), mitogen-activated protein kinases (MAPKs), etc., and inhibiting protein phosphatase 2A (PP2A). The metal ions imbalances can also directly or indirectly disrupt organelles, causing endoplasmic reticulum (ER) stress; mitochondrial and autophagic dysfunctions, which can cause or aggravate Aβ and tau aggregation/accumulation, and impair synaptic functions. Even worse, the metal ions imbalance-induced alterations can reversely exacerbate metal ions misdistribution and deposition. The vicious cycles between metal ions imbalances and Aβ/tau abnormalities will eventually lead to a chronic neurodegeneration and cognitive deficits, such as seen in AD patients. Conclusion The metal ions imbalance induces Aβ and tau pathologies by directly or indirectly affecting multiple cellular/subcellular pathways, and the disrupted homeostasis can reversely aggravate the abnormalities of metal ions transportation/deposition. Therefore, adjusting metal balance by supplementing or chelating the metal ions may be potential in ameliorating AD pathologies, which provides new research directions for AD treatment.
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Affiliation(s)
- Lu Wang
- 1Key Laboratory of Brain Research of Henan Province, Sino-UK Joint Laboratory of Brain Function and Injury of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, 453003 China
| | - Ya-Ling Yin
- 1Key Laboratory of Brain Research of Henan Province, Sino-UK Joint Laboratory of Brain Function and Injury of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, 453003 China
| | - Xin-Zi Liu
- 1Key Laboratory of Brain Research of Henan Province, Sino-UK Joint Laboratory of Brain Function and Injury of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, 453003 China
| | - Peng Shen
- 1Key Laboratory of Brain Research of Henan Province, Sino-UK Joint Laboratory of Brain Function and Injury of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, 453003 China
| | - Yan-Ge Zheng
- 1Key Laboratory of Brain Research of Henan Province, Sino-UK Joint Laboratory of Brain Function and Injury of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, 453003 China
| | - Xin-Rui Lan
- 1Key Laboratory of Brain Research of Henan Province, Sino-UK Joint Laboratory of Brain Function and Injury of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, 453003 China
| | - Cheng-Biao Lu
- 1Key Laboratory of Brain Research of Henan Province, Sino-UK Joint Laboratory of Brain Function and Injury of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, 453003 China
| | - Jian-Zhi Wang
- 2Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 China
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14
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Metal-Peptide Complexes to Study Neurodegenerative Diseases. Methods Mol Biol 2019. [PMID: 31879936 DOI: 10.1007/978-1-0716-0227-0_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Dishomeostasis of Cu(II) ions in the human body is connected with several serious diseases such as Alzheimer's disease or Wilson's disease. Therefore, a deep understanding of Cu(II)-binding properties to metal ions carriers, together with the knowledge about how they can interact with other copper-binding partners, e.g., amyloid-β (Aβ), is required to assess their relevance to the brain metal homeostasis. Ultraviolet-visible spectrometry (UV-Vis) and circular dichroism (CD) were used to study the coordination characteristics of Cu(II) with peptide containing the amino-terminal (H2N-Xaa-Yaa-His-) copper-binding (ATCUN) motif (Aβ12-16-VHHQK-NH2) derived from Aβ peptide.
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15
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Arrigoni F, Prosdocimi T, Mollica L, De Gioia L, Zampella G, Bertini L. Copper reduction and dioxygen activation in Cu-amyloid beta peptide complexes: insight from molecular modelling. Metallomics 2019; 10:1618-1630. [PMID: 30345437 DOI: 10.1039/c8mt00216a] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Alzheimer's disease (AD) involves a number of factors including an anomalous interaction of copper with the amyloid peptide (Aβ), inducing oxidative stress with radical oxygen species (ROS) production through a three-step cycle in which O2 is gradually reduced to superoxide, oxygen peroxide and finally OH radicals. The purpose of this work has been to investigate the reactivity of 14 different Cu(ii)-Aβ coordination models with the aim of identifying on an energy basis (Density Functional Theory (DFT) and classical Molecular Dynamics (MD)) the redox competent form(s). Accordingly, we have specifically focused on the first three steps of the cycle, i.e. ascorbate binding to Cu(ii), Cu(ii) → Cu(i) reduction and O2 reduction to O2-. Compared to the recent literature, our results broaden the set of possible redox competent metallopeptide forms responsible for ROS production. Indeed, in addition to the three-coordinated species containing one His ligand, a N-terminal amine group and the carboxylate side chain of the Asp1 residue of Aβ already proposed, we found two other Cu-Aβ coordination modes involving two histidines.
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Affiliation(s)
- Federica Arrigoni
- Department of Biotechnologies and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy.
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16
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Tuttle RR, Rubin HN, Rithner CD, Finke RG, Reynolds MM. Copper ion vs copper metal-organic framework catalyzed NO release from bioavailable S-Nitrosoglutathione en route to biomedical applications: Direct 1H NMR monitoring in water allowing identification of the distinct, true reaction stoichiometries and thiol dependencies. J Inorg Biochem 2019; 199:110760. [PMID: 31349071 DOI: 10.1016/j.jinorgbio.2019.110760] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 06/24/2019] [Accepted: 07/07/2019] [Indexed: 01/23/2023]
Abstract
Copper containing compounds catalyze decomposition of S-Nitrosoglutathione (GSNO) in the presence of glutathione (GSH) yielding glutathione disulfide (GSSG) and nitric oxide (NO). Extended NO generation from an endogenous source is medically desirable to achieve vasodilation, reduction in biofilms on medical devices, and antibacterial activity. Homogeneous and heterogeneous copper species catalyze release of NO from endogenous GSNO. One heterogeneous catalyst used for GSNO decomposition in blood plasma is the metal-organic framework (MOF), H3[(Cu4Cl)3-(BTTri)8, H3BTTri = 1,3,5-tris(1H-1,2,3-triazol-5-yl) benzene] (CuBTTri). Fundamental questions about these systems remain unanswered, despite their use in biomedical applications, in part because no method previously existed for simultaneous tracking of [GSNO], [GSH], and [GSSG] in water. Tracking these reactions in water is a necessary step towards study in biological media (blood is approximately 80% water) where NO release systems must operate. Even the balanced stoichiometry remains unknown for copper-ion and CuBTTri catalyzed GSNO decomposition. Herein, we report a direct 1H NMR method which: simultaneously monitors [GSNO], [GSH], and [GSSG] in water; provides the experimentally determined stoichiometry for copper-ion vs CuBTTri catalyzed GSNO decomposition; reveals that the CuBTTri-catalyzed reaction reaches 10% GSNO decomposition (16 h) without added GSH, yet the copper-ion catalyzed reaction reaches 100% GSNO decomposition (16 h) without added GSH; and shows 100% GSNO decomposition upon addition of stoichiometric GSH to the CuBTTri catalyzed reaction. These observations provide evidence that copper-ion and CuBTTri catalyzed GSNO decomposition in water operate through different reaction mechanisms, the details of which can now be probed by 1H NMR kinetics and other needed studies.
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Affiliation(s)
- Robert R Tuttle
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, United States
| | - Heather N Rubin
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, United States
| | - Christopher D Rithner
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, United States
| | - Richard G Finke
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, United States
| | - Melissa M Reynolds
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, United States; School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, United States; Department of Chemical & Biological Engineering, Colorado State University, Fort Collins, CO 80523, United States.
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17
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Stefaniak E, Bal W. Cu II Binding Properties of N-Truncated Aβ Peptides: In Search of Biological Function. Inorg Chem 2019; 58:13561-13577. [PMID: 31304745 DOI: 10.1021/acs.inorgchem.9b01399] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
As life expectancy increases, the number of people affected by progressive and irreversible dementia, Alzheimer's Disease (AD), is predicted to grow. No drug designs seem to be working in humans, apparently because the origins of AD have not been identified. Invoking amyloid cascade, metal ions, and ROS production hypothesis of AD, herein we share our point of view on Cu(II) binding properties of Aβ4-x, the most prevalent N-truncated Aβ peptide, currently known as the main constituent of amyloid plaques. The capability of Aβ4-x to rapidly take over copper from previously tested Aβ1-x peptides and form highly stable complexes, redox unreactive and resistant to copper exchange reactions, prompted us to propose physiological roles for these peptides. We discuss the new findings on the reactivity of Cu(II)Aβ4-x with coexisting biomolecules in the context of synaptic cleft; we suggest that the role of Aβ4-x peptides is to quench Cu(II) toxicity in the brain and maintain neurotransmission.
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Affiliation(s)
- Ewelina Stefaniak
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a , 02-106 Warsaw , Poland
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a , 02-106 Warsaw , Poland
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18
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Esmieu C, Guettas D, Conte-Daban A, Sabater L, Faller P, Hureau C. Copper-Targeting Approaches in Alzheimer’s Disease: How To Improve the Fallouts Obtained from in Vitro Studies. Inorg Chem 2019; 58:13509-13527. [DOI: 10.1021/acs.inorgchem.9b00995] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
| | | | | | | | - Peter Faller
- LCC−CNRS, Université de Toulouse, CNRS, Toulouse, France
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19
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Phleomycin complex – Coordination mode and in vitro cleavage of DNA. J Inorg Biochem 2019; 195:71-82. [DOI: 10.1016/j.jinorgbio.2019.03.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 02/15/2019] [Accepted: 03/10/2019] [Indexed: 11/21/2022]
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20
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Influence of methionine–ruthenium complex on the fibril formation of human islet amyloid polypeptide. J Biol Inorg Chem 2019; 24:179-189. [DOI: 10.1007/s00775-019-01637-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 01/14/2019] [Indexed: 02/07/2023]
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21
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Kotuniak R, Fra̧czyk T, Skrobecki P, Płonka D, Bal W. Gly-His-Thr-Asp-Amide, an Insulin-Activating Peptide from the Human Pancreas Is a Strong Cu(II) but a Weak Zn(II) Chelator. Inorg Chem 2018; 57:15507-15516. [DOI: 10.1021/acs.inorgchem.8b02841] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Radosław Kotuniak
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Tomasz Fra̧czyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
- Department of Immunology, Transplantology and Internal Medicine, Medical University of Warsaw, Nowogrodzka 59, 02-006 Warsaw, Poland
| | - Piotr Skrobecki
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Dawid Płonka
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
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22
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Yao J, Lu H, Wang Z, Wang T, Fang F, Wang J, Yu J, Gao R. A sensitive method for the determination of the gender difference of neuroactive metabolites in tryptophan and dopamine pathways in mouse serum and brain by UHPLC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1093-1094:91-99. [PMID: 30005419 DOI: 10.1016/j.jchromb.2018.06.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 06/20/2018] [Accepted: 06/24/2018] [Indexed: 12/21/2022]
Abstract
Tryptophan (TRP) and dopamine (DA) pathways are of great importance for their related pathology and physiology. In the present study, a new reliable and sensitive analytical method was developed and validated for 12 neuroactive metabolites in TRP and DA pathways in mouse serum and brain by ultra-high-performance liquid chromatography coupled to tandem mass spectrometry (UHPLC-MS/MS). The method exhibited good sensitivity as the lower limit of detections ranged from 0.10 to 0.50 ng/ml and the lower limit of quantifications ranged from 0.20 to 2.00 ng/ml by derivatization with dansyl chloride (DNS-Cl) following solid phase extraction (SPE) on C18 cartridges. Good linearity (R2 > 0.99), intra-day precision (<9.8% in serum and <8.8% in brain), inter-day precision (<8.9% in serum and <8.5% in brain) and accuracy (90.3%-110.3% in serum and 86.5%-114.0% in brain) were obtained. The method was successfully applied in measuring 12 neuroactive metabolites in TRP and DA pathways in serum and brain samples of male and female mice to explore the differences between genders. As a result, DA and the turnover of DA to 3,4-dihydroxyphenylacetic acid (DOPAC), 5-hydroxtryptamine (5-HT) to TRP and 5-hydroxyindole acetic acid (5-HIAA) to 5-HT in the serum and norepinephrine (NE) in the brain were significantly different between genders.
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Affiliation(s)
- Jiaxi Yao
- Department of Hygienic Analysis and Detection, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, No. 101 Longmian Avenue, Nanjing 211166, China
| | - Haihua Lu
- Department of Hygienic Analysis and Detection, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, No. 101 Longmian Avenue, Nanjing 211166, China
| | - Zhonghe Wang
- Department of Hygienic Analysis and Detection, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, No. 101 Longmian Avenue, Nanjing 211166, China
| | - Tingwei Wang
- Department of Toxicology, Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, No. 101 Longmian Avenue, Nanjing 211166, China
| | - Fangfang Fang
- Department of Toxicology, Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, No. 101 Longmian Avenue, Nanjing 211166, China
| | - Jun Wang
- Department of Toxicology, Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, No. 101 Longmian Avenue, Nanjing 211166, China
| | - Jing Yu
- Department of Hygienic Analysis and Detection, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, No. 101 Longmian Avenue, Nanjing 211166, China.
| | - Rong Gao
- Department of Hygienic Analysis and Detection, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, No. 101 Longmian Avenue, Nanjing 211166, China.
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23
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Sgarlata C, Arena G, Bonomo RP, Giuffrida A, Tabbì G. Simple and mixed complexes of copper(II) with 8-hydroxyquinoline derivatives and amino acids: Characterization in solution and potential biological implications. J Inorg Biochem 2018; 180:89-100. [DOI: 10.1016/j.jinorgbio.2017.12.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 12/01/2017] [Accepted: 12/04/2017] [Indexed: 12/12/2022]
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24
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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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25
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Jeżowska-Bojczuk M, Stokowa-Sołtys K. Peptides having antimicrobial activity and their complexes with transition metal ions. Eur J Med Chem 2017; 143:997-1009. [PMID: 29232589 DOI: 10.1016/j.ejmech.2017.11.086] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 11/08/2017] [Accepted: 11/27/2017] [Indexed: 12/30/2022]
Abstract
Peptide antibiotics are produced by bacterial, mammalian, insect or plant organisms in defense against invasive microbial pathogens. Therefore, they are gaining importance as anti-infective agents. There are a number of antibiotics that require metal ions to function properly. Metal ions play a key role in their action and are involved in specific interactions with proteins, nucleic acids and other biomolecules. On the other hand, it is well known that some antimicrobial agents possess functional groups that enable them interacting with metal ions present in physiological fluids. Some findings support a hypothesis that they may alter the serum metal ions concentration in humans. Complexes usually have a higher positive charge than uncomplexed compounds. This means that they might interact more tightly with polyanionic DNA and RNA molecules. It has been shown that several metal ion complexes with antibiotics promote degradation of DNA. Some of them, such as bleomycin, form stable complexes with redox metal ions and split the nucleic acids chain via the free radicals mechanism. However, this is not a rule. For example blasticidin does not cause DNA damage. This indicates that some peptide antibiotics can be considered as ligands that effectively lower the oxidative activity of transition metal ions.
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Affiliation(s)
| | - Kamila Stokowa-Sołtys
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
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26
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Drew SC. The Case for Abandoning Therapeutic Chelation of Copper Ions in Alzheimer's Disease. Front Neurosci 2017; 11:317. [PMID: 28626387 PMCID: PMC5455140 DOI: 10.3389/fnins.2017.00317] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 05/18/2017] [Indexed: 12/26/2022] Open
Abstract
The "therapeutic chelation" approach to treating Alzheimer's disease (AD) evolved from the metals hypothesis, with the premise that small molecules can be designed to prevent transition metal-induced amyloid deposition and oxidative stress within the AD brain. Over more than 20 years, countless in vitro studies have been devoted to characterizing metal binding, its effect on Aβ aggregation, ROS production, and in vitro toxicity. Despite a lack of evidence for any clinical benefit, the conjecture that therapeutic chelation is an effective approach for treating AD remains widespread. Here, the author plays the devil's advocate, questioning the experimental evidence, the dogma, and the value of therapeutic chelation, with a major focus on copper ions.
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Affiliation(s)
- Simon C. Drew
- Department of Medicine, Royal Melbourne Hospital, University of MelbourneMelbourne, VIC, Australia
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27
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Nguyen M, Vendier L, Stigliani JL, Meunier B, Robert A. Structures of the Copper and Zinc Complexes of PBT2, a Chelating Agent Evaluated as Potential Drug for Neurodegenerative Diseases. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601120] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Michel Nguyen
- Laboratoire de Chimie de Coordination du CNRS; 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
| | - Laure Vendier
- Laboratoire de Chimie de Coordination du CNRS; 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
| | - Jean-Luc Stigliani
- Laboratoire de Chimie de Coordination du CNRS; 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
| | - Bernard Meunier
- Laboratoire de Chimie de Coordination du CNRS; 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
- Guangdong University of Technology; Department of Chemical Engineering; No. 100 Waihuan Xi road, Education Mega Center Guangzhou P. R. China
| | - Anne Robert
- Laboratoire de Chimie de Coordination du CNRS; 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
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28
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Oliveri V, Pietropaolo A, Sgarlata C, Vecchio G. Zinc Complexes of Cyclodextrin-bearing 8-Hydroxyquinoline Ligands: A Comparative Study. Chem Asian J 2016; 12:110-115. [DOI: 10.1002/asia.201601389] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Valentina Oliveri
- Dipartimento di Scienze Chimiche; Università degli Studi di Catania; viale A. Doria 6 95125 Catania Italy
- Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici, C.I.R.C.M.S.B.; Unità di Ricerca di Catania; 95125 Catania Italy
| | - Adriana Pietropaolo
- Dipartimento di Scienze della Salute; Università di Catanzaro; viale Europa 88100 Catanzaro Italy
| | - Carmelo Sgarlata
- Dipartimento di Scienze Chimiche; Università degli Studi di Catania; viale A. Doria 6 95125 Catania Italy
| | - Graziella Vecchio
- Dipartimento di Scienze Chimiche; Università degli Studi di Catania; viale A. Doria 6 95125 Catania Italy
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29
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Oliveri V, Sgarlata C, Vecchio G. Cyclodextrins 3-Functionalized with 8-Hydroxyquinolines: Copper-Binding Ability and Inhibition of Synuclein Aggregation. Chem Asian J 2016; 11:2436-42. [PMID: 27432795 DOI: 10.1002/asia.201600824] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Indexed: 01/28/2023]
Abstract
Neurodegenerative diseases such as Parkinson's and Alzheimer's diseases are multifactorial disorders related to protein aggregation, metal dyshomeostasis, and oxidative stress. To advance understanding in this area and to contribute to therapeutic development, many efforts have been directed at devising suitable agents that can target metal ions associated with relevant biomolecules such as α-synuclein. This paper presents a new cyclodextrin-8-hydroxyquinoline conjugate and discusses the properties of four cyclodextrins 3-functionalized with 8-hydroxyquinoline as copper(II) chelators and inhibitors of copper-induced synuclein aggregation. The encouraging results establish the potential of cyclodextrin-8-hydroxyquinoline conjugates as chelators for the control of copper toxicity.
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Affiliation(s)
- Valentina Oliveri
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, viale A. Doria 6, 95125, Catania, Italy.,Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici, C.I.R.C.M.S.B., Unità di Ricerca di Catania, 95125, Catania, Italy
| | - Carmelo Sgarlata
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, viale A. Doria 6, 95125, Catania, Italy
| | - Graziella Vecchio
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, viale A. Doria 6, 95125, Catania, Italy.
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30
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Bossak K, Mital M, Poznański J, Bonna A, Drew S, Bal W. Interactions of α-Factor-1, a Yeast Pheromone, and Its Analogue with Copper(II) Ions and Low-Molecular-Weight Ligands Yield Very Stable Complexes. Inorg Chem 2016; 55:7829-31. [PMID: 27476515 DOI: 10.1021/acs.inorgchem.6b01441] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
α-Factor-1 (WHWLQLKPGQPMY), a peptidic pheromone of Saccharomyces cerevisiae yeast, contains a XHX type copper(II) binding N-terminal site. Using a soluble analogue, WHWSKNR-amide, we demonstrated that the W(1)H(2)W(3) site alone binds copper(II) with a Kd value of 0.18 pM at pH 7.4 and also binds imidazole (Im) in a ternary complex (Kd of 1 mM at pH 7.4). This interaction boosts the ability of the peptide to sequester copper(II) depending on the Im concentration up to a subfemtomolar range, not available for any oligopeptidic system studied before. Therefore, α-factor-1 and other XHX-type peptides are likely copper(II) carriers in biological systems.
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Affiliation(s)
- Karolina Bossak
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Mariusz Mital
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a, 02-106 Warsaw, Poland.,Florey Department of Neuroscience and Mental Health, The University of Melbourne , Melbourne, Victoria 3010, Australia
| | - Jarosław Poznański
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Arkadiusz Bonna
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Simon Drew
- Florey Department of Neuroscience and Mental Health, The University of Melbourne , Melbourne, Victoria 3010, Australia
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a, 02-106 Warsaw, Poland
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31
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Mital M, Zawisza IA, Wiloch MZ, Wawrzyniak UE, Kenche V, Wróblewski W, Bal W, Drew SC. Copper Exchange and Redox Activity of a Prototypical 8-Hydroxyquinoline: Implications for Therapeutic Chelation. Inorg Chem 2016; 55:7317-9. [DOI: 10.1021/acs.inorgchem.6b00832] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mariusz Mital
- Florey Department of Neuroscience and Mental Health, The University of Melbourne, Melbourne, Victoria 3010, Australia
- Institute of Biochemistry
and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland
| | - Izabela A. Zawisza
- Institute of Biochemistry
and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland
| | - Magdalena Z. Wiloch
- Department of Microbioanalytics, Faculty
of Chemistry, Warsaw University of Technology, Warsaw 00-664, Poland
| | - Urszula E. Wawrzyniak
- Department of Microbioanalytics, Faculty
of Chemistry, Warsaw University of Technology, Warsaw 00-664, Poland
| | - Vijaya Kenche
- Florey Department of Neuroscience and Mental Health, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Wojciech Wróblewski
- Department of Microbioanalytics, Faculty
of Chemistry, Warsaw University of Technology, Warsaw 00-664, Poland
| | - Wojciech Bal
- Institute of Biochemistry
and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland
| | - Simon C. Drew
- Florey Department of Neuroscience and Mental Health, The University of Melbourne, Melbourne, Victoria 3010, Australia
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Haigh CL, Tumpach C, Collins SJ, Drew SC. A 2-Substituted 8-Hydroxyquinoline Stimulates Neural Stem Cell Proliferation by Modulating ROS Signalling. Cell Biochem Biophys 2016; 74:297-306. [DOI: 10.1007/s12013-016-0747-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 06/09/2016] [Indexed: 01/05/2023]
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Chowdhury SR, Agarwal M, Meher N, Muthuraj B, Iyer PK. Modulation of Amyloid Aggregates into Nontoxic Coaggregates by Hydroxyquinoline Appended Polyfluorene. ACS APPLIED MATERIALS & INTERFACES 2016; 8:13309-13319. [PMID: 27152771 DOI: 10.1021/acsami.6b03668] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Inhibitory modulation toward de novo protein aggregation is likely to be a vital and promising therapeutic strategy for understanding the molecular etiology of amyloid related diseases such as Alzheimer's disease (AD). The building up of toxic oligomeric and fibrillar amyloid aggregates in the brain plays host to a downstream of events, causing damage to axons, dendrites, synapses, signaling, transmission, and finally cell death. Herein, we introduce a novel conjugated polymer (CP), hydroxyquinoline appended polyfluorene (PF-HQ), which has a typical "amyloid like" surface motif and exhibits inhibitory modulation effect on amyloid β (Aβ) aggregation. We delineate inhibitory effects of PF-HQ based on Thioflavin T (ThT) fluorescence, atomic force microscopy (AFM), circular dichroism (CD), and Fourier transform infrared (FTIR) studies. The amyloid-like PF-HQ forms nano coaggregates by templating with toxic amyloid intermediates and displays improved inhibitory impacts toward Aβ fibrillation and diminishes amyloid cytotoxicity. We have developed a CP based modulation strategy for the first time, which demonstrates beneficiary amyloid-like surface motif to interact efficiently with the protein, the pendant side groups to trap the toxic amyloid intermediates as well as optical signal to acquire the mechanistic insight.
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Affiliation(s)
- Sayan Roy Chowdhury
- Department of Chemistry, ‡Department of Bioscience and Bioengineering, and §Center for Nanotechnology, Indian Institute of Technology Guwahati , Guwahati, 781039 Assam, India
| | - Mahesh Agarwal
- Department of Chemistry, ‡Department of Bioscience and Bioengineering, and §Center for Nanotechnology, Indian Institute of Technology Guwahati , Guwahati, 781039 Assam, India
| | - Niranjan Meher
- Department of Chemistry, ‡Department of Bioscience and Bioengineering, and §Center for Nanotechnology, Indian Institute of Technology Guwahati , Guwahati, 781039 Assam, India
| | - Balakrishnan Muthuraj
- Department of Chemistry, ‡Department of Bioscience and Bioengineering, and §Center for Nanotechnology, Indian Institute of Technology Guwahati , Guwahati, 781039 Assam, India
| | - Parameswar Krishnan Iyer
- Department of Chemistry, ‡Department of Bioscience and Bioengineering, and §Center for Nanotechnology, Indian Institute of Technology Guwahati , Guwahati, 781039 Assam, India
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Frączyk T, Zawisza IA, Goch W, Stefaniak E, Drew SC, Bal W. On the ability of CuAβ1-x peptides to form ternary complexes: Neurotransmitter glutamate is a competitor while not a ternary partner. J Inorg Biochem 2016; 158:5-10. [PMID: 26970944 DOI: 10.1016/j.jinorgbio.2016.02.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 02/23/2016] [Accepted: 02/28/2016] [Indexed: 01/21/2023]
Abstract
In the light of conflicting reports on the ability of copper(II) complexes of amyloid beta (Aβ) peptides to form ternary complexes with small molecules co-present in the biological milieu, we performed a study of coordination equilibria in the system containing Cu(II) ions, the Aβ1-16 peptide, glutamic acid and 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid, HEPES) buffer. Using potentiometry, isothermal titration calorimetry (ITC), UV-visible spectroscopy and EPR, we concluded that glutamic acid was not able to form such a ternary complex, but can efficiently compete for the Cu(II) ion with the Aβ peptide at Glu concentrations relevant for the synaptic cleft. We also found that the literature constants for Cu(II) complexes with Glu were overestimated, but this effect was partially compensated by the formation of a ternary Cu(Glu)(HEPES) complex. Our results indicate that small molecules co-present with Cu(II) ions and Aβ peptides in the synaptic cleft are not very likely to enhance Cu(II)/Aβ interactions, but instead should be considered as a Cu(II) buffering system that may help prevent these interactions and participate in Cu(II) clearance from the synaptic cleft.
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Affiliation(s)
- Tomasz Frączyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Izabela A Zawisza
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Wojciech Goch
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Ewelina Stefaniak
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Simon C Drew
- Florey Department of Neuroscience and Mental Health, The University of Melbourne, Victoria, 3010, Australia
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland.
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Prati F, Bergamini C, Fato R, Soukup O, Korabecny J, Andrisano V, Bartolini M, Bolognesi ML. Novel 8-Hydroxyquinoline Derivatives as Multitarget Compounds for the Treatment of Alzheimer′s Disease. ChemMedChem 2016; 11:1284-95. [DOI: 10.1002/cmdc.201600014] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Federica Prati
- Department of Pharmacy and Biotechnology; Alma Mater Studiorum University of Bologna; Via Belmeloro 6/Via Irnerio 48 40126 Bologna Italy
| | - Christian Bergamini
- Department of Pharmacy and Biotechnology; Alma Mater Studiorum University of Bologna; Via Belmeloro 6/Via Irnerio 48 40126 Bologna Italy
| | - Romana Fato
- Department of Pharmacy and Biotechnology; Alma Mater Studiorum University of Bologna; Via Belmeloro 6/Via Irnerio 48 40126 Bologna Italy
| | - Ondrej Soukup
- Biomedical Research Center; University Hospital Hradec Kralove; Sokolska 581 500 05 Hradec Kralove Czech Republic
| | - Jan Korabecny
- Biomedical Research Center; University Hospital Hradec Kralove; Sokolska 581 500 05 Hradec Kralove Czech Republic
| | - Vincenza Andrisano
- Department for Quality Life Studies; Alma Mater Studiorum University of Bologna; Corso d'Augusto 237 47921 Rimini Italy
| | - Manuela Bartolini
- Department of Pharmacy and Biotechnology; Alma Mater Studiorum University of Bologna; Via Belmeloro 6/Via Irnerio 48 40126 Bologna Italy
| | - Maria Laura Bolognesi
- Department of Pharmacy and Biotechnology; Alma Mater Studiorum University of Bologna; Via Belmeloro 6/Via Irnerio 48 40126 Bologna Italy
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Yang ZL, Li H, Wang B, Liu SY. An optimized method for neurotransmitters and their metabolites analysis in mouse hypothalamus by high performance liquid chromatography–Q Exactive hybrid quadrupole-orbitrap high-resolution accurate mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1012-1013:79-88. [DOI: 10.1016/j.jchromb.2016.01.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 01/05/2016] [Accepted: 01/06/2016] [Indexed: 01/07/2023]
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Oliveri V, Bellia F, Grasso GI, Pietropaolo A, Vecchio G. Trehalose-8-hydroxyquinoline conjugates as antioxidant modulators of Aβ aggregation. RSC Adv 2016. [DOI: 10.1039/c6ra04204j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The conjugation of trehalose with 8-hydroxyquinoline induces synergistic effects that lead to good antiaggregant ability. The difunctionalization of trehalose produces a better-performing antiaggregant compound.
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Affiliation(s)
- Valentina Oliveri
- Dipartimento di Scienze Chimiche
- Università di Catania
- Catania
- Italy
- Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici C.I.R.C.M.S.B
| | | | | | - Adriana Pietropaolo
- Dipartimento di Scienze della Salute
- Università di Catanzaro
- 88100 Catanzaro
- Italy
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Nguyen M, Bijani C, Martins N, Meunier B, Robert A. Transfer of Copper from an Amyloid to a Natural Copper-Carrier Peptide with a Specific Mediating Ligand. Chemistry 2015; 21:17085-90. [DOI: 10.1002/chem.201502824] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Indexed: 11/09/2022]
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39
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De Ricco R, Valensin D, Dell'Acqua S, Casella L, Hureau C, Faller P. Copper(I/II), α/β-Synuclein and Amyloid-β: Menage à Trois? Chembiochem 2015; 16:2319-28. [PMID: 26338312 DOI: 10.1002/cbic.201500425] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Indexed: 12/12/2022]
Abstract
Copper binding to α-synuclein (aS) and to amyloid-β (Ab) has been connected to Parkinson's and Alzheimer's disease (AD), respectively, because Cu ions can modulate the peptide aggregation, and these Cu ⋅ peptide complexes can catalyse the production of reactive oxygen species (ROS). In a significant proportion of AD brains, aggregation of aS and Ab has been detected, and it was proposed that Ab and aS interact with each other. Thus, we investigated the potential interactions of Ab and aS through their binding of copper(I) and copper(II). Additionally, β-synuclein (bS) was investigated, due to its additional methionine residue, a potential Cu(I) ligand. We found that: 1) the peptides containing the Cu-binding domains Ab1-16, aS1-15 and bS1-15 have similar affinities towards Cu(II) and towards Cu(I), with Ab1-16 being slightly stronger, 2) in the case of Cu(I), the additional Met residue in bS1-15 increased the affinity slightly, 3) the exchange of Cu(I/II) between the two peptides is rapid (≤ ms), 4) a/bS1-15 and Ab1-16 form a heterodimeric complex with Cu(II), 5) Cu(I) probably promotes a transient ternary complex, 6) the different Cu(I/II) coordination of Ab1-16, aS1-15 and bS1-15 impacts the capacity to produce ROS and to oxidise catechol, and 7) when Ab1-16, aS1-15 and Cu are present, the ROS production more closely resembles that by Ab1-16. The work gives insights into the coordination chemistry of these related peptides, and the relevance of coordination differences, the ternary complex and ROS production are discussed.
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Affiliation(s)
- Riccardo De Ricco
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, B. P. 44099, 31077, Toulouse Cedex 4, France.,Université de Toulouse, UPS, INPT, 205 Route de Narbonne, B. P. 44099, 31077, Toulouse Cedex 4, France.,Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Daniela Valensin
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro 2, 53100, Siena, Italy.
| | - Simone Dell'Acqua
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Luigi Casella
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Christelle Hureau
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, B. P. 44099, 31077, Toulouse Cedex 4, France.,Université de Toulouse, UPS, INPT, 205 Route de Narbonne, B. P. 44099, 31077, Toulouse Cedex 4, France
| | - Peter Faller
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, B. P. 44099, 31077, Toulouse Cedex 4, France. .,Université de Toulouse, UPS, INPT, 205 Route de Narbonne, B. P. 44099, 31077, Toulouse Cedex 4, France.
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40
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Koukoulitsa C, Villalonga-Barber C, Csonka R, Alexi X, Leonis G, Dellis D, Hamelink E, Belda O, Steele BR, Micha-Screttas M, Alexis MN, Papadopoulos MG, Mavromoustakos T. Biological and computational evaluation of resveratrol inhibitors against Alzheimer's disease. J Enzyme Inhib Med Chem 2015; 31:67-77. [PMID: 26147348 DOI: 10.3109/14756366.2014.1003928] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
It has been reported that beta amyloid induces production of radical oxygen species and oxidative stress in neuronal cells, which in turn upregulates β-secretase (BACE-1) expression and beta amyloid levels, thereby propagating oxidative stress and increasing neuronal injury. A series of resveratrol derivatives, known to be inhibitors of oxidative stress-induced neuronal cell death (oxytosis) were biologically evaluated against BACE-1 using homogeneous time-resolved fluorescence (TRF) assay. Correlation between oxytosis inhibitory and BACE-1 inhibitory activity of resveratrol derivatives was statistically significant, supporting the notion that BACE-1 may act as pivotal mediator of neuronal cell oxytosis. Four of the biologically evaluated resveratrol analogs demonstrated considerably higher activity than resveratrol in either assay. The discovery of some "hits" led us to initiate detailed docking studies associated with Molecular Dynamics in order to provide a plausible explanation for the experimental results and understand their molecular basis of action.
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Affiliation(s)
| | - Caroline Villalonga-Barber
- b Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens , Greece
| | - Robert Csonka
- b Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens , Greece
| | - Xanthippi Alexi
- b Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens , Greece
| | - Georgios Leonis
- b Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens , Greece
| | - Dimitris Dellis
- c Institute of Accelerating Systems and Applications , Panepistimiopolis Zografou , Athens , Greece , and
| | | | | | - Barry R Steele
- b Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens , Greece
| | - Maria Micha-Screttas
- b Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens , Greece
| | - Michael N Alexis
- b Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens , Greece
| | - Manthos G Papadopoulos
- b Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens , Greece
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41
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Robert A, Liu Y, Nguyen M, Meunier B. Regulation of copper and iron homeostasis by metal chelators: a possible chemotherapy for Alzheimer's disease. Acc Chem Res 2015; 48:1332-9. [PMID: 25946460 DOI: 10.1021/acs.accounts.5b00119] [Citation(s) in RCA: 151] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
With the increase of life expectancy of humans in more than two-thirds of the countries in the World, aging diseases are becoming the frontline health problems. Alzheimer's disease (AD) is now one of the major challenges in drug discovery, since, with the exception of memantine in 2003, all clinical trials with drug candidates failed over the past decade. If we consider that the loss of neurons is due to a high level of oxidative stress produced by nonregulated redox active metal ions like copper linked to amyloids of different sizes, regulation of metal homeostasis is a key target. The difficulty for large copper-carrier proteins to directly extract copper ions from metalated amyloids might be considered as being at the origin of the rupture of the copper homeostasis regulation in AD brains. So, there is an urgent need for new specific metal chelators that should be able to regulate the homeostasis of metal ions, specially copper and iron, in AD brains. As a consequence of that concept, chelators promoting metal excretion from brain are not desired. One should favor ligands able to extract copper ions from sinks (amyloids being the major one) and to transfer these redox-active metal ions to copper-carrier proteins or copper-containing enzymes. Obviously, the affinity of these chelators for the metal ion should not be a sufficient criterion, but the metal specificity and the ability of the chelators to release the metal under specific biological conditions should be considered. Such an approach is still largely unexplored. The requirements for the chelators are very high (ability to cross the brain-blood barrier, lack of toxicity, etc.), few chemical series were proposed, and, among them, biochemical or biological data are scarce. As a matter of fact, the bioinorganic pharmacology of AD represents less than 1% of all articles dedicated to AD drug research. The major part of these articles deals with an old and rather toxic drug, clioquinol and related analogs, that do not efficiently extract copper from soluble amyloids. We have designed and developed new tetradendate ligands such as 21 and PA1637 based on bis(8-aminoquinolines) that are specific for copper chelation and are able to extract copper(II) from amyloids and then can release copper ion upon reduction with a biological reducing agent. These studies contribute to the understanding of the physicochemical properties of the tetradentate copper ligands compared with bidentate ligands like clioquinol. One of these copper ligands, PA1637, after selection with a nontransgenic mouse model that is able to efficiently monitor the loss of episodic memory, is currently under preclinical development.
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Affiliation(s)
- Anne Robert
- Laboratoire
de Chimie de Coordination du CNRS, 205 route de Narbonne, BP 44099, 31077 cedex 4 Toulouse, France
| | - Yan Liu
- School
of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, Guangdong 510006, P. R. China
| | - Michel Nguyen
- Laboratoire
de Chimie de Coordination du CNRS, 205 route de Narbonne, BP 44099, 31077 cedex 4 Toulouse, France
| | - Bernard Meunier
- Laboratoire
de Chimie de Coordination du CNRS, 205 route de Narbonne, BP 44099, 31077 cedex 4 Toulouse, France
- School
of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, Guangdong 510006, P. R. China
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42
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Stabilization of nontoxic Aβ-oligomers: insights into the mechanism of action of hydroxyquinolines in Alzheimer's disease. J Neurosci 2015; 35:2871-84. [PMID: 25698727 DOI: 10.1523/jneurosci.2912-14.2015] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The extracellular accumulation of amyloid β (Aβ) peptides is characteristic of Alzheimer's disease (AD). However, formation of diffusible, oligomeric forms of Aβ, both on and off pathways to amyloid fibrils, is thought to include neurotoxic species responsible for synaptic loss and neurodegeneration, rather than polymeric amyloid aggregates. The 8-hydroxyquinolines (8-HQ) clioquinol (CQ) and PBT2 were developed for their ability to inhibit metal-mediated generation of reactive oxygen species from Aβ:Cu complexes and have both undergone preclinical and Phase II clinical development for the treatment of AD. Their respective modes of action are not fully understood and may include both inhibition of Aβ fibrillar polymerization and direct depolymerization of existing Aβ fibrils. In the present study, we find that CQ and PBT2 can interact directly with Aβ and affect its propensity to aggregate. Using a combination of biophysical techniques, we demonstrate that, in the presence of these 8-HQs and in the absence of metal ions, Aβ associates with two 8-HQ molecules and forms a dimer. Furthermore, 8-HQ bind Aβ with an affinity of 1-10 μm and suppress the formation of large (>30 kDa) oligomers. The stabilized low molecular weight species are nontoxic. Treatment with 8-HQs also reduces the levels of in vivo soluble oligomers in a Caenorhabditis elegans model of Aβ toxicity. We propose that 8-HQs possess an additional mechanism of action that neutralizes neurotoxic Aβ oligomer formation through stabilization of small (dimeric) nontoxic Aβ conformers.
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43
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Oliveri V, Grasso GI, Bellia F, Attanasio F, Viale M, Vecchio G. Soluble Sugar-Based Quinoline Derivatives as New Antioxidant Modulators of Metal-Induced Amyloid Aggregation. Inorg Chem 2015; 54:2591-602. [DOI: 10.1021/ic502713f] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Valentina Oliveri
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria 6, 95125 Catania, Italy
| | - Giuseppa I. Grasso
- Istituto di Biostrutture e Bioimmagini (IBB), CNR, Via P. Gaifami 18, 95126, Catania, Italy
| | - Francesco Bellia
- Istituto di Biostrutture e Bioimmagini (IBB), CNR, Via P. Gaifami 18, 95126, Catania, Italy
| | - Francesco Attanasio
- Istituto di Biostrutture e Bioimmagini (IBB), CNR, Via P. Gaifami 18, 95126, Catania, Italy
| | - Maurizio Viale
- IRCCS Azienda Ospedaliera Universitaria San Martino − IST Istituto Nazionale per la Ricerca sul Cancro, U.O.C. Bioterapie, L.go R. Benzi, 10, 16132 Genova, Italy
| | - Graziella Vecchio
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria 6, 95125 Catania, Italy
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Ma L, Fu Y, Yu L, Li X, Zheng W, Chen T. Ruthenium complexes as inhibitors of human islet amyloid polypeptide aggregation, an effect that prevents beta cell apoptosis. RSC Adv 2015. [DOI: 10.1039/c4ra15152f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Herein we show that ruthenium complexes could inhibit fibrosis of hIAPP and protect the hIAPP-induced cell damage by suppressing ROS generation, indicating the application potential of the complexes in treatment of T2DM by targeting hIAPP.
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Affiliation(s)
- Lijuan Ma
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Yuanting Fu
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Lianling Yu
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Xiaoling Li
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Wenjie Zheng
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Tianfeng Chen
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
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45
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Curtain CC, Kirby NM, Mertens HDT, Barnham KJ, Knott RB, Masters CL, Cappai R, Rekas A, Kenche VB, Ryan T. Alpha-synuclein oligomers and fibrils originate in two distinct conformer pools: a small angle X-ray scattering and ensemble optimisation modelling study. MOLECULAR BIOSYSTEMS 2015; 11:190-6. [DOI: 10.1039/c4mb00356j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Size exclusion chromatography with small angle X-ray scattering and ensemble optimisation modelling reveals conformers in random pool of α-synuclein.
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Affiliation(s)
- Cyril C. Curtain
- Department of Pathology and Bio21 Molecular Science and Technology Institute
- The University of Melbourne
- Victoria 3010
- Australia
- The University of Melbourne
| | - Nigel M. Kirby
- SAXS/WAXS Beamline
- The Australian Synchrotron
- Clayton
- Australia
| | | | - Kevin J. Barnham
- Department of Pathology and Bio21 Molecular Science and Technology Institute
- The University of Melbourne
- Victoria 3010
- Australia
- The University of Melbourne
| | - Robert B. Knott
- Australian Nuclear Science and Technology Organisation (ANSTO)
- Kirrawee
- Australia
| | - Colin L. Masters
- The University of Melbourne
- Florey Institute of Neuroscience and Mental Health
- Victoria 3010
- Australia
| | - Roberto Cappai
- Department of Pathology and Bio21 Molecular Science and Technology Institute
- The University of Melbourne
- Victoria 3010
- Australia
| | - Agata Rekas
- Australian Nuclear Science and Technology Organisation (ANSTO)
- Kirrawee
- Australia
| | - Vijaya B. Kenche
- The University of Melbourne
- Florey Institute of Neuroscience and Mental Health
- Victoria 3010
- Australia
| | - Timothy Ryan
- The University of Melbourne
- Florey Institute of Neuroscience and Mental Health
- Victoria 3010
- Australia
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46
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Synthesis, characterization and Cu 2+ binding studies of l -histidine ester of 8-hydroxyquinoline. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.07.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Nguyen M, Rechignat L, Robert A, Meunier B. The Necessity of Having a Tetradentate Ligand to Extract Copper(II) Ions from Amyloids. ChemistryOpen 2014; 4:27-31. [PMID: 25861567 PMCID: PMC4380950 DOI: 10.1002/open.201402075] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Indexed: 01/18/2023] Open
Abstract
The accumulation of redox-active metal ions, in particular copper, in amyloid plaques is considered to the cause of the intensive oxidation damage to the brain of patients with Alzheimers disease (AD). Drug candidates based on a bis(8-aminoquinoline) tetradentate ligand are able to efficiently extract Cu(2+) from copper-loaded amyloids (Cu-Aβ). Contrarily, in the presence of a bidentate hydroxyquinoline, such as clioquinol, the copper is not released from Aβ, but remains sequestrated within a Aβ-Cu-clioquinol ternary complex that has been characterized by mass spectrometry. Facile extraction of copper(II) at a low amyloid/ligand ratio is essential for the re-introduction of copper in regular metal circulation in the brain. As, upon reduction, the Cu(+) is easily released from the bis(8-aminoquinoline) ligand unable to accommodate Cu(I), it should be taken by proteins with an affinity for copper. So, the tetradentate bis(8-aminoquinoline) described here might act as a regulator of copper homeostasis.
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Affiliation(s)
- Michel Nguyen
- Laboratoire de Chimie de Coordination du Centre National de la Recherche Scientifique (CNRS) 205 route de Narbonne, BP 44099, 31077 Toulouse cedex 4 (France)
| | - Lionel Rechignat
- Laboratoire de Chimie de Coordination du Centre National de la Recherche Scientifique (CNRS) 205 route de Narbonne, BP 44099, 31077 Toulouse cedex 4 (France)
| | - Anne Robert
- Laboratoire de Chimie de Coordination du Centre National de la Recherche Scientifique (CNRS) 205 route de Narbonne, BP 44099, 31077 Toulouse cedex 4 (France)
| | - Bernard Meunier
- Laboratoire de Chimie de Coordination du Centre National de la Recherche Scientifique (CNRS) 205 route de Narbonne, BP 44099, 31077 Toulouse cedex 4 (France) ; Department of Chemical Engineering, Guangdong University of Technology, Education Mega Center 100 Waihuan Xi Rd, Guangzhou (P. R. China)
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Oliveri V, Attanasio F, Puglisi A, Spencer J, Sgarlata C, Vecchio G. Multifunctional 8-hydroxyquinoline-appended cyclodextrins as new inhibitors of metal-induced protein aggregation. Chemistry 2014; 20:8954-64. [PMID: 24863958 DOI: 10.1002/chem.201402690] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Indexed: 11/09/2022]
Abstract
Mounting evidence suggests a pivotal role of metal imbalances in protein misfolding and amyloid diseases. As such, metal ions represent a promising therapeutic target. In this context, the synthesis of chelators that also contain complementary functionalities to combat the multifactorial nature of neurodegenerative diseases is a highly topical issue. We report two new 8-hydroxyquinoline-appended cyclodextrins and highlight their multifunctional properties, including their Cu(II) and Zn(II) binding abilities, and capacity to act as antioxidants and metal-induced antiaggregants. In particular, the latter property has been applied in the development of an effective assay that exploits the formation of amyloid fibrils when β-lactoglobulin A is heated in the presence of metal ions.
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Affiliation(s)
- Valentina Oliveri
- Dipartimento di Scienze Chimiche, Università di Catania, Viale A. Doria 6, 95125 Catania (Italy); Department of Chemistry, School of Life Sciences, University of Sussex, Falmer, Brighton, East Sussex BN1 9QJ (UK)
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Oliveri V, Puglisi A, Viale M, Aiello C, Sgarlata C, Vecchio G, Clarke J, Milton J, Spencer J. New cyclodextrin-bearing 8-hydroxyquinoline ligands as multifunctional molecules. Chemistry 2013; 19:13946-55. [PMID: 24038335 DOI: 10.1002/chem.201300237] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 07/02/2013] [Indexed: 12/11/2022]
Abstract
Recent investigations have rekindled interest in 8-hydroxyquinolines as therapeutic agents for cancer, Alzheimer's disease, and other neurodegenerative disorders. Three new β-cyclodextrin conjugates of 8-hydroxyquinolines and their copper(II) and zinc(II) complexes have been synthesized and characterized spectroscopically. In addition to improving aqueous solubility, due to the presence of the cyclodextrin moiety, the hybrid systems have interesting characteristics including antioxidant activity, and their copper(II) complexes are efficient superoxide dismutase (SOD) mimics. The ligands and their copper(II) complexes show low cytotoxicity, attributed to the presence of the cyclodextrin moiety. These compounds have potential as therapeutic agents in diseases related both to metal dyshomeostasis and oxidative stress.
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Affiliation(s)
- Valentina Oliveri
- Dipartimento di Scienze Chimiche, University of Catania, Viale A. Doria 6, 95125 Catania (Italy); Department of Chemistry, School of Life Sciences, University of Sussex, Falmer, Brighton, East Sussex BN1 9QJ (UK)
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He L, Wang X, Zhao C, Wang H, Du W. Ruthenium complexes as novel inhibitors of human islet amyloid polypeptide fibril formation. Metallomics 2013; 5:1599-603. [DOI: 10.1039/c3mt00146f] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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