101
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Soler M, Figueras E, Serrano-Plana J, González-Bártulos M, Massaguer A, Company A, Martínez MÁ, Malina J, Brabec V, Feliu L, Planas M, Ribas X, Costas M. Design, Preparation, and Characterization of Zn and Cu Metallopeptides Based On Tetradentate Aminopyridine Ligands Showing Enhanced DNA Cleavage Activity. Inorg Chem 2015; 54:10542-58. [PMID: 26503063 DOI: 10.1021/acs.inorgchem.5b01680] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The conjugation of redox-active complexes that can function as chemical nucleases to cationic tetrapeptides is pursued in this work in order to explore the expected synergistic effect between these two elements in DNA oxidative cleavage. Coordination complexes of biologically relevant first row metal ions, such as Zn(II) or Cu(II), containing the tetradentate ligands 1,4-dimethyl-7-(2-pyridylmethyl)-1,4,7-triazacyclononane ((Me2)PyTACN) and (2S,2S')-1,1'-bis(pyrid-2-ylmethyl)-2,2'-bipyrrolidine ((S,S')-BPBP) have been linked to a cationic LKKL tetrapeptide sequence. Solid-phase synthesis of the peptide-tetradentate ligand conjugates has been developed, and the preparation and characterization of the corresponding metallotetrapeptides is described. The DNA cleavage activity of Cu and Zn metallopeptides has been evaluated and compared to their metal binding conjugates as well as to the parent complexes and ligands. Very interestingly, the oxidative Cu metallopeptides 1Cu and 2Cu show an enhanced activity compared to the parent complexes, [Cu(PyTACN)](2+) and [Cu(BPBP)](2+), respectively. Under optimized conditions, 1Cu displays an apparent pseudo first-order rate constant (kobs) of ∼0.16 min(-1) with a supercoiled DNA half-life time (t1/2) of ∼4.3 min. On the other hand, kobs for 2Cu has been found to be ∼0.11 min(-1) with t1/2 ≈ 6.4 min. Hence, these results point out that the DNA cleavage activities promoted by the metallopeptides 1Cu and 2Cu render ∼4-fold and ∼23 rate accelerations in comparison with their parent Cu complexes. Additional binding assays and mechanistic studies demonstrate that the enhanced cleavage activities are explained by the presence of the cationic LKKL tetrapeptide sequence, which induces an improved binding affinity to the DNA, thus bringing the metal ion, which is responsible for cleavage, in close proximity.
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Affiliation(s)
- Marta Soler
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain.,LIPPSO, Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Eduard Figueras
- LIPPSO, Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Joan Serrano-Plana
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Marta González-Bártulos
- Biochemistry of Cancer Group, Biochemistry and Molecular Biology Unit, Department de Química and Department of Biology, Universitat de Girona , Campus Montilivi, 17071 Girona, Catalunya, Spain
| | - Anna Massaguer
- Biochemistry of Cancer Group, Biochemistry and Molecular Biology Unit, Department de Química and Department of Biology, Universitat de Girona , Campus Montilivi, 17071 Girona, Catalunya, Spain
| | - Anna Company
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Ma Ángeles Martínez
- Biochemistry of Cancer Group, Biochemistry and Molecular Biology Unit, Department de Química and Department of Biology, Universitat de Girona , Campus Montilivi, 17071 Girona, Catalunya, Spain
| | - Jaroslav Malina
- Institute of Biophysics, Academy of Sciences of the Czech Republic , v.v.i., Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Viktor Brabec
- Institute of Biophysics, Academy of Sciences of the Czech Republic , v.v.i., Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Lidia Feliu
- LIPPSO, Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Marta Planas
- LIPPSO, Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Xavi Ribas
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Miquel Costas
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
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102
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Liu Y, Xu LP, Wang S, Yang W, Wen Y, Zhang X. An ultrasensitive electrochemical immunosensor for apolipoprotein E4 based on fractal nanostructures and enzyme amplification. Biosens Bioelectron 2015; 71:396-400. [DOI: 10.1016/j.bios.2015.04.068] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 04/18/2015] [Accepted: 04/21/2015] [Indexed: 12/28/2022]
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103
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Zandevakili T, Fatemi SJ, Sheibani V. Chelation of manganese by combining deferasirox, deferiprone and desferrioxamine in male rats as biological model. TOXIN REV 2015. [DOI: 10.3109/15569543.2015.1074924] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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104
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Fosso MY, LeVine H, Green KD, Tsodikov OV, Garneau-Tsodikova S. Effects of structural modifications on the metal binding, anti-amyloid activity, and cholinesterase inhibitory activity of chalcones. Org Biomol Chem 2015; 13:9418-26. [PMID: 26248214 DOI: 10.1039/c5ob01478f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
As the number of individuals affected with Alzheimer's disease (AD) increases and the availability of drugs for AD treatment remains limited, the need to develop effective therapeutics for AD becomes more and more pressing. Strategies currently pursued include inhibiting acetylcholinesterase (AChE) and targeting amyloid-β (Aβ) peptides and metal-Aβ complexes. This work presents the design, synthesis, and biochemical evaluation of a series of chalcones, and assesses the relationship between their structures and their ability to bind metal ions and/or Aβ species, and inhibit AChE/BChE activity. Several chalcones were found to exhibit potent disaggregation of pre-formed N-biotinyl Aβ1-42 (bioAβ42) aggregates in vitro in the absence and presence of Cu(2+)/Zn(2+), while others were effective at inhibiting the action of AChE.
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Affiliation(s)
- Marina Y Fosso
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY 40536-0596, USA.
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105
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Kandanapitiye MS, Gunathilake C, Jaroniec M, Huang SD. Biocompatible D-Penicillamine Conjugated Au Nanoparticles: Targeting Intracellular Free Copper Ions for Detoxification. J Mater Chem B 2015; 3:5553-5559. [PMID: 26213624 PMCID: PMC4510992 DOI: 10.1039/c5tb00189g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High thiophillicicity of the Au-nanoparticle (Au NP) surface leads to covalent attachment of D-penicillamine molecules to Au NPs to form biocompatible D-penicillamine conjugated Au NPs. The latter are highly water-dispersible, exhibit no cytotoxicity, and can readily penetrate the cell membrane to target intracellular free copper ions for selective copper detoxification in the presence of the other divalent essential metal ions including Zn(II), Fe(II), Mn(II), Ca(II), and Mg(II), thus opening up a new avenue for improving the efficacy and pharmacokinetics of D-penicillamine, an important clinical drug currently used to treat the copper overload-related diseases and disorders.
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Affiliation(s)
| | - Chamila Gunathilake
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA
| | - Mietek Jaroniec
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA
| | - Songping D. Huang
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA
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106
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Ashraf GM, Greig NH, Khan TA, Hassan I, Tabrez S, Shakil S, Sheikh IA, Zaidi SK, Akram M, Jabir NR, Firoz CK, Naeem A, Alhazza IM, Damanhouri GA, Kamal MA. Protein misfolding and aggregation in Alzheimer's disease and type 2 diabetes mellitus. CNS & NEUROLOGICAL DISORDERS-DRUG TARGETS 2015; 13:1280-93. [PMID: 25230234 DOI: 10.2174/1871527313666140917095514] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Revised: 05/11/2014] [Accepted: 05/12/2014] [Indexed: 12/27/2022]
Abstract
In general, proteins can only execute their various biological functions when they are appropriately folded. Their amino acid sequence encodes the relevant information required for correct three-dimensional folding, with or without the assistance of chaperones. The challenge associated with understanding protein folding is currently one of the most important aspects of the biological sciences. Misfolded protein intermediates form large polymers of unwanted aggregates and are involved in the pathogenesis of many human diseases, including Alzheimer's disease (AD) and Type 2 diabetes mellitus (T2DM). AD is one of the most prevalent neurological disorders and has worldwide impact; whereas T2DM is considered a metabolic disease that detrementally influences numerous organs, afflicts some 8% of the adult population, and shares many risk factors with AD. Research data indicates that there is a widespread conformational change in the proteins involved in AD and T2DM that form β-sheet like motifs. Although conformation of these β-sheets is common to many functional proteins, the transition from α-helix to β-sheet is a typical characteristic of amyloid deposits. Any abnormality in this transition results in protein aggregation and generation of insoluble fibrils. The abnormal and toxic proteins can interact with other native proteins and consequently catalyze their transition into the toxic state. Both AD and T2DM are prevalent in the aged population. AD is characterized by the accumulation of amyloid-β (Aβ) in brain, while T2DM is characterized by the deposition of islet amyloid polypeptide (IAPP, also known as amylin) within beta-cells of the pancreas. T2DM increases pathological angiogenesis and immature vascularisation. This also leads to chronic cerebral hypoperfusion, which results in dysfunction and degeneration of neuroglial cells. With an abundance of common mechanisms underpinning both disorders, a significant question that can be posed is whether T2DM leads to AD in aged individuals and the associations between other protein misfolding diseases.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Mohammad A Kamal
- King Fahd Medical Research Center, King Abdulaziz University, P. O. Box 80216, Jeddah 21589, Kingdom of Saudi Arabia.
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107
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Ligational behavior of clioquinol antifungal drug towards Ag(I), Hg(II), Cr(III) and Fe(III) metal ions: Synthesis, spectroscopic, thermal, morphological and antimicrobial studies. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.12.081] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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108
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Kong X, Zhao Z, Lei X, Zhang B, Dai D, Jiang L. Interaction of Metal Ions with the His13-His14 Sequence Relevant to Alzheimer’s Disease. J Phys Chem A 2015; 119:3528-34. [DOI: 10.1021/acs.jpca.5b01443] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xiangtao Kong
- State Key Laboratory
of Molecular Reaction Dynamics, iChEM, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Zhi Zhao
- State Key Laboratory
of Molecular Reaction Dynamics, iChEM, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
- School of Physics
and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
| | - Xin Lei
- State Key Laboratory
of Molecular Reaction Dynamics, iChEM, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Bingbing Zhang
- State Key Laboratory
of Molecular Reaction Dynamics, iChEM, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
- State Key Laboratory
of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Dongxu Dai
- State Key Laboratory
of Molecular Reaction Dynamics, iChEM, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Ling Jiang
- State Key Laboratory
of Molecular Reaction Dynamics, iChEM, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
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109
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Derrick JS, Lim MH. Tools of the Trade: Investigations into Design Strategies of Small Molecules to Target Components in Alzheimer's Disease. Chembiochem 2015; 16:887-98. [DOI: 10.1002/cbic.201402718] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Indexed: 12/21/2022]
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110
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Zhai J, Xie X, Bakker E. Ion-Selective Optode Nanospheres as Heterogeneous Indicator Reagents in Complexometric Titrations. Anal Chem 2015; 87:2827-31. [DOI: 10.1021/ac504213q] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Jingying Zhai
- Department of Inorganic and
Analytical Chemistry, University of Geneva, Quai Ernest-Ansermet 30, CH-1211 Geneva, Switzerland
| | - Xiaojiang Xie
- Department of Inorganic and
Analytical Chemistry, University of Geneva, Quai Ernest-Ansermet 30, CH-1211 Geneva, Switzerland
| | - Eric Bakker
- Department of Inorganic and
Analytical Chemistry, University of Geneva, Quai Ernest-Ansermet 30, CH-1211 Geneva, Switzerland
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111
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Huang L, Liu X, Cheng B, Huang K. How our bodies fight amyloidosis: effects of physiological factors on pathogenic aggregation of amyloidogenic proteins. Arch Biochem Biophys 2015; 568:46-55. [PMID: 25615529 DOI: 10.1016/j.abb.2015.01.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 01/08/2015] [Accepted: 01/11/2015] [Indexed: 12/15/2022]
Abstract
The process of protein aggregation from soluble amyloidogenic proteins to insoluble amyloid fibrils plays significant roles in the onset of over 30 human amyloidogenic diseases, such as Prion disease, Alzheimer's disease and type 2 diabetes mellitus. Amyloid deposits are commonly found in patients suffered from amyloidosis; however, such deposits are rarely seen in healthy individuals, which may be largely attributed to the self-regulation in vivo. A vast number of physiological factors have been demonstrated to directly affect the process of amyloid formation in vivo. In this review, physiological factors that influence amyloidosis, including biological factors (chaperones, natural antibodies, enzymes, lipids and saccharides) and physicochemical factors (metal ions, pH environment, crowding and pressure, etc.), together with the mechanisms underlying these proteostasis effects, are summarized.
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Affiliation(s)
- Lianqi Huang
- Tongji School of Pharmacy, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Xinran Liu
- Tongji School of Pharmacy, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Biao Cheng
- Department of Pharmacy, Central Hospital of Wuhan, Wuhan, Hubei 430014, PR China
| | - Kun Huang
- Tongji School of Pharmacy, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China; Centre for Biomedicine Research, Wuhan Institute of Biotechnology, Wuhan, Hubei 430075, PR China.
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112
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Hauser-Davis RA, de Freitas LV, Cukierman DS, Cruz WS, Miotto MC, Landeira-Fernandez J, Valiente-Gabioud AA, Fernández CO, Rey NA. Disruption of zinc and copper interactions with Aβ(1–40) by a non-toxic, isoniazid-derived, hydrazone: a novel biometal homeostasis restoring agent in Alzheimer's disease therapy? Metallomics 2015; 7:743-7. [DOI: 10.1039/c5mt00003c] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A non-toxic hydrazone with potential anti-Alzheimer activity: this organic ligand disrupts anomalous metal–Aβ(1–40) interactions, and, thus, seems suitable as a metal-protein attenuating compound.
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Affiliation(s)
- R. A. Hauser-Davis
- Laboratory of Organic Synthesis and Coordination Chemistry Applied to Biological Systems (LABSO-BIO)
- Department of Chemistry
- Pontifical Catholic University of Rio de Janeiro (PUC-Rio)
- Rio de Janeiro, RJ, Brazil
| | - L. V. de Freitas
- Laboratory of Organic Synthesis and Coordination Chemistry Applied to Biological Systems (LABSO-BIO)
- Department of Chemistry
- Pontifical Catholic University of Rio de Janeiro (PUC-Rio)
- Rio de Janeiro, RJ, Brazil
| | - D. S. Cukierman
- Laboratory of Organic Synthesis and Coordination Chemistry Applied to Biological Systems (LABSO-BIO)
- Department of Chemistry
- Pontifical Catholic University of Rio de Janeiro (PUC-Rio)
- Rio de Janeiro, RJ, Brazil
| | - W. S. Cruz
- Laboratory of Organic Synthesis and Coordination Chemistry Applied to Biological Systems (LABSO-BIO)
- Department of Chemistry
- Pontifical Catholic University of Rio de Janeiro (PUC-Rio)
- Rio de Janeiro, RJ, Brazil
| | - M. C. Miotto
- Max Planck Laboratory for Structural Biology
- Chemistry and Molecular Biophysics of Rosario (MPLbioR)
- Universidad Nacional de Rosario
- S2002LRK Rosario, Argentina
| | - J. Landeira-Fernandez
- Nucleus of Clinical and Experimental Neuropsychology
- Department of Psychology
- PUC-Rio
- Rio de Janeiro, RJ, Brazil
| | - A. A. Valiente-Gabioud
- Max Planck Laboratory for Structural Biology
- Chemistry and Molecular Biophysics of Rosario (MPLbioR)
- Universidad Nacional de Rosario
- S2002LRK Rosario, Argentina
| | - C. O. Fernández
- Max Planck Laboratory for Structural Biology
- Chemistry and Molecular Biophysics of Rosario (MPLbioR)
- Universidad Nacional de Rosario
- S2002LRK Rosario, Argentina
| | - N. A. Rey
- Laboratory of Organic Synthesis and Coordination Chemistry Applied to Biological Systems (LABSO-BIO)
- Department of Chemistry
- Pontifical Catholic University of Rio de Janeiro (PUC-Rio)
- Rio de Janeiro, RJ, Brazil
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113
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Yang Y, Chen T, Zhu S, Gu X, Jia X, Lu Y, Zhu L. Two macrocyclic polyamines as modulators of metal-mediated Aβ40aggregation. Integr Biol (Camb) 2015; 7:655-62. [DOI: 10.1039/c5ib00064e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
L1 and L2 can inhibit the metal-induced Aβ40aggregation, attenuate neurotoxicity, suppress the intracellular ROS and protect against cell apoptosis.
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Affiliation(s)
- Yanfei Yang
- School of Chemistry and Chemical Engineering
- Nantong University
- Nantong
- P. R. China
- Institute of Nautical Medicine
| | - Tingting Chen
- School of Chemistry and Chemical Engineering
- Nantong University
- Nantong
- P. R. China
- Institute of Nautical Medicine
| | - Shajun Zhu
- Department of General Surgery
- Affiliated Hospital of Nantong University
- Nantong
- P. R. China
| | - Xuefang Gu
- School of Chemistry and Chemical Engineering
- Nantong University
- Nantong
- P. R. China
| | - Xueping Jia
- School of Chemistry and Chemical Engineering
- Nantong University
- Nantong
- P. R. China
| | - Yapeng Lu
- Institute of Nautical Medicine
- Nantong University
- Nantong
- P. R. China
| | - Li Zhu
- Institute of Nautical Medicine
- Nantong University
- Nantong
- P. R. China
- Co-innovation Center of Neuroregeneration
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114
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Jiang N, Wang XB, Li ZR, Li SY, Xie SS, Huang M, Kong LY. Design of a structural framework with potential use to develop balanced multifunctional agents against Alzheimer's disease. RSC Adv 2015. [DOI: 10.1039/c4ra10692j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of small molecules had been designed, synthesized, and evaluated as multifunctional ligands against Alzheimer's disease (AD).
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Affiliation(s)
- Neng Jiang
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- People's Republic of China
| | - Xiao-Bing Wang
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- People's Republic of China
| | - Zhong-Rui Li
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- People's Republic of China
| | - Su-Yi Li
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- People's Republic of China
| | - Sai-Sai Xie
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- People's Republic of China
| | - Ming Huang
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- People's Republic of China
| | - Ling-Yi Kong
- State Key Laboratory of Natural Medicines
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- People's Republic of China
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115
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Kim D, Bang JK, Kim SH. Multi-Frequency, Multi-Technique Pulsed EPR Investigation of the Copper Binding Site of Murine Amyloid β Peptide. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201410389] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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116
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Multi-Frequency, Multi-Technique Pulsed EPR Investigation of the Copper Binding Site of Murine Amyloid β Peptide. Angew Chem Int Ed Engl 2014; 54:1561-4. [DOI: 10.1002/anie.201410389] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Indexed: 11/07/2022]
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117
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Sharma AK, Kim J, Prior JT, Hawco NJ, Rath NP, Kim J, Mirica LM. Small bifunctional chelators that do not disaggregate amyloid β fibrils exhibit reduced cellular toxicity. Inorg Chem 2014; 53:11367-76. [PMID: 25333939 PMCID: PMC4220862 DOI: 10.1021/ic500926c] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Indexed: 01/22/2023]
Abstract
Multifunctional metal chelators that can modulate the amyloid β (Aβ) peptide aggregation and its interaction with metal ions such as copper and zinc hold considerable promise as therapeutic agents for Alzheimer's disease (AD). However, specific rather than systemic metal chelation by these compounds is needed in order to limit any side effects. Reported herein are two novel small bifunctional chelators, 2-[2-hydroxy-4-(diethylamino)phenyl]benzothiazole (L1) and 2-(2-hydroxy-3-methoxyphenyl)benzothiazole (L2), in which the metal-binding donor atoms are integrated within a molecular framework derived from the amyloid-binding fluorescent dye thioflavin T (ThT). The metal-binding properties of L1 and L2 were probed by pH spectrophotometric titrations to determine their pKa values and the corresponding metal complex stability constants, and the isolated metal complexes were structurally characterized. The amyloid-fibril-binding properties of L1 and L2 were investigated by fluorescence titrations and ThT competition assays. Interestingly, L1 and L2 do not lead to the formation of neurotoxic Aβ42 oligomers in the presence or absence of metal ions, as observed by native gel electrophoresis, Western blotting, and transmission electron microscopy. In addition, L1 and L2 were able to reduce the cell toxicity of preformed Aβ42 oligomers and of the copper-stabilized Aβ42 oligomers. Given their ability to reduce the toxicity of soluble Aβ42 and Cu-Aβ42 species, L1 and L2 are promising lead compounds for the development of chemical agents that can control the neurotoxicity of soluble Aβ42 species in AD.
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Affiliation(s)
- Anuj K. Sharma
- Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - Jaekwang Kim
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri 63108, United States
| | - John T. Prior
- Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - Nicholas J. Hawco
- Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - Nigam P. Rath
- Department
of Chemistry and Biochemistry, University
of Missouri—St. Louis, One University Boulevard, St. Louis, Missouri 63121-4400, United States
| | - Jungsu Kim
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri 63108, United States
| | - Liviu M. Mirica
- Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, United States
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118
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Jiang N, Li SY, Xie SS, Li ZR, Wang KD, Wang XB, Kong LY. Design, synthesis and evaluation of multifunctional salphen derivatives for the treatment of Alzheimer's disease. Eur J Med Chem 2014; 87:540-51. [DOI: 10.1016/j.ejmech.2014.10.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 09/28/2014] [Accepted: 10/01/2014] [Indexed: 10/24/2022]
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119
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Porter MR, Kochi A, Karty JA, Lim MH, Zaleski JM. Chelation-induced diradical formation as an approach to modulation of the amyloid-β aggregation pathway. Chem Sci 2014; 6:1018-1026. [PMID: 29560189 PMCID: PMC5811126 DOI: 10.1039/c4sc01979b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 10/30/2014] [Indexed: 11/21/2022] Open
Abstract
Current approaches toward modulation of metal-induced Aβ aggregation pathways involve the development of small molecules that bind metal ions, such as Cu(ii) and Zn(ii), and interact with Aβ. For this effort, we present the enediyne-containing ligand (Z)-N,N'-bis[1-pyridin-2-yl-meth(E)-ylidene]oct-4-ene-2,6-diyne-1,8-diamine (PyED), which upon chelation of Cu(ii) and Zn(ii) undergoes Bergman-cyclization to yield diradical formation. The ability of this chelation-triggered diradical to modulate Aβ aggregation is evaluated relative to the non-radical generating control pyridine-2-ylmethyl-(2-{[(pyridine-2-ylmethylene)-amino]-methyl}-benzyl)-amine (PyBD). Variable-pH, ligand UV-vis titrations reveal pKa = 3.81(2) for PyBD, indicating it exists mainly in the neutral form at experimental pH. Lipinski's rule parameters and evaluation of blood-brain barrier (BBB) penetration potential by the PAMPA-BBB assay suggest that PyED may be CNS+ and penetrate the BBB. Both PyED and PyBD bind Zn(ii) and Cu(ii) as illustrated by bathochromic shifts of their UV-vis features. Speciation diagrams indicate that Cu(ii)-PyBD is the major species at pH 6.6 with a nanomolar Kd, suggesting the ligand may be capable of interacting with Cu(ii)-Aβ species. In the presence of Aβ40/42 under hyperthermic conditions (43 °C), the radical-generating PyED demonstrates markedly enhanced activity (2-24 h) toward the modulation of Aβ species as determined by gel electrophoresis. Correspondingly, transmission electron microscopy images of these samples show distinct morphological changes to the fibril structure that are most prominent for Cu(ii)-Aβ cases. The loss of CO2 from the metal binding region of Aβ in MALDI-TOF mass spectra further suggests that metal-ligand-Aβ interaction with subsequent radical formation may play a role in the aggregation pathway modulation.
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Affiliation(s)
- Meghan R Porter
- Department of Chemistry , Indiana University , Bloomington , Indiana 47405 , USA .
| | - Akiko Kochi
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , USA.,Department of Chemistry , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798 , Korea .
| | - Jonathan A Karty
- Department of Chemistry , Indiana University , Bloomington , Indiana 47405 , USA .
| | - Mi Hee Lim
- Department of Chemistry , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798 , Korea . .,Life Sciences Institute , University of Michigan , Ann Arbor , Michigan 48109 , USA
| | - Jeffrey M Zaleski
- Department of Chemistry , Indiana University , Bloomington , Indiana 47405 , USA .
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120
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Goswami D, Machini MT, Silvestre DM, Nomura CS, Esposito BP. Cell penetrating peptide (CPP)-conjugated desferrioxamine for enhanced neuroprotection: synthesis and in vitro evaluation. Bioconjug Chem 2014; 25:2067-80. [PMID: 25299707 DOI: 10.1021/bc5004197] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Iron overload causes progressive and sometimes irreversible damage due to accelerated production of reactive oxygen species. Desferrioxamine (DFO), a siderophore, has been used clinically to remove excess iron. However, the applications of DFO are limited because of its inability to access intracellular labile iron. Cell penetrating peptides (CPPs) have become an efficient delivery vector for the enhanced internalization of drugs into the cytosol. We describe, herein, an efficient method for covalently conjugating DFO to the CPPs TAT(47-57) and Penetratin. Both conjugates suppressed the redox activity of labile plasma iron in buffered solutions and in iron-overloaded sera. Enhanced access to intracellular labile iron compared to the parent siderophore was achieved in HeLa and RBE4 (a model of blood-brain-barrier) cell lines. Iron complexes of both conjugates also had better permeability in both cell models. DFO antioxidant and iron binding properties were preserved and its bioavailability was increased upon CPP conjugation, which opens new therapeutic possibilities for neurodegenerative processes associated with brain iron overload.
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Affiliation(s)
- Dibakar Goswami
- Departamentos de Química Fundamental e de ‡Bioquímica, Instituto de Química, Universidade de São Paulo , Av. Lineu Prestes 748, 05508-000, São Paulo, Brazil
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121
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Synthesis and characterization of 1H-phenanthro[9,10-d]imidazole derivatives as multifunctional agents for treatment of Alzheimer's disease. Biochim Biophys Acta Gen Subj 2014; 1840:2886-903. [DOI: 10.1016/j.bbagen.2014.05.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 04/25/2014] [Accepted: 05/05/2014] [Indexed: 01/12/2023]
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122
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Akam EA, Chang TM, Astashkin AV, Tomat E. Intracellular reduction/activation of a disulfide switch in thiosemicarbazone iron chelators. Metallomics 2014; 6:1905-12. [PMID: 25100578 DOI: 10.1039/c4mt00153b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Iron scavengers (chelators) offer therapeutic opportunities in anticancer drug design by targeting the increased demand for iron in cancer cells as compared to normal cells. Prochelation approaches are expected to avoid systemic iron depletion as chelators are liberated under specific intracellular conditions. In the strategy described herein, a disulfide linkage is employed as a redox-directed switch within the binding unit of an antiproliferative thiosemicarbazone prochelator, which is activated for iron coordination following reduction to the thiolate chelator. In glutathione redox buffer, this reduction event occurs at physiological concentrations and half-cell potentials. Consistent with concurrent reduction and activation, higher intracellular thiol concentrations increase cell susceptibility to prochelator toxicity in cultured cancer cells. The reduction of the disulfide switch and intracellular iron chelation are confirmed in cell-based assays using calcein as a fluorescent probe for paramagnetic ions. The resulting low-spin Fe(III) complex is identified in intact Jurkat cells by EPR spectroscopy measurements, which also document a decreased concentration of active ribonucleotide reductase following exposure to the prochelator. Cell viability and fluorescence-based assays show that the iron complex presents low cytotoxicity and does not participate in intracellular redox chemistry, indicating that this antiproliferative chelation strategy does not rely on the generation of reactive oxygen species.
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Affiliation(s)
- Eman A Akam
- University of Arizona, Department of Chemistry and Biochemistry, 1306 E. University Blvd., Tucson, AZ 85721-0041, USA.
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123
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Li M, Zhao C, Duan T, Ren J, Qu X. New insights into Alzheimer's disease amyloid inhibition: nanosized metallo-supramolecular complexes suppress aβ-induced biosynthesis of heme and iron uptake in PC12 cells. Adv Healthc Mater 2014; 3:832-6. [PMID: 24574275 DOI: 10.1002/adhm.201300470] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 09/20/2013] [Indexed: 12/12/2022]
Abstract
Nanosized metallo-supramolecular compounds, [Ni2 L3 ](4+) and [Fe2 L3 ](4+) , can not only strongly inhibit Aβ aggregation but also reduce the peroxidase activity of Aβ-heme. Further studies demonstrate that through blocking the heme-binding site, these two compounds can suppress Aβ-induced biosynthesis of heme and iron uptake in PC12 cells. This work provides new insights into molecular mechanisms of Aβ inhibitors on Aβ-mediated neurotoxicity.
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Affiliation(s)
- Meng Li
- Laboratory of Chemical Biology; Division of Biological Inorganic Chemistry; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; University of Chinese Academy of Sciences, Chinese Academy of Sciences; Changchun Jilin 130022 China
| | - Chuanqi Zhao
- Laboratory of Chemical Biology; Division of Biological Inorganic Chemistry; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; University of Chinese Academy of Sciences, Chinese Academy of Sciences; Changchun Jilin 130022 China
| | - Taicheng Duan
- Laboratory of Chemical Biology; Division of Biological Inorganic Chemistry; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; University of Chinese Academy of Sciences, Chinese Academy of Sciences; Changchun Jilin 130022 China
- National Analytical Research Center of Electrochemistry & Spectroscopy; Changchun Institute of Applied Chemistry; Chinese Academy of Science; Changchun Jilin 130022 China
| | - Jinsong Ren
- Laboratory of Chemical Biology; Division of Biological Inorganic Chemistry; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; University of Chinese Academy of Sciences, Chinese Academy of Sciences; Changchun Jilin 130022 China
| | - Xiaogang Qu
- Laboratory of Chemical Biology; Division of Biological Inorganic Chemistry; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; University of Chinese Academy of Sciences, Chinese Academy of Sciences; Changchun Jilin 130022 China
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124
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Yu L, Jiang R, Su Q, Yu H, Yang J. Hippocampal neuronal metal ion imbalance related oxidative stress in a rat model of chronic aluminum exposure and neuroprotection of meloxicam. Behav Brain Funct 2014; 10:6. [PMID: 24618126 PMCID: PMC3995718 DOI: 10.1186/1744-9081-10-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 02/28/2014] [Indexed: 01/22/2023] Open
Abstract
Neurodegenerative diseases remain a significant unresolved societal burden afflicting millions of people worldwide. Neurons in the brain are highly sensitive to oxidative stress, which can be induced by metal toxicity. In this paper, a chronic aluminum overload-induced model of neurodegeneration was used to investigate whether metal ions (Al, Fe, Mn, Cu and Zn)-related oxidative stress was involved in neurodegenerative mechanism and to identify the protective action of meloxicam against rat hippocampal neuronal injury. The metal ion contents, activity of superoxide dismutase (SOD), and content of malondialdehyde (MDA) were detected. The results showed that the spatial learning and memory (SLM) function was significantly impaired in chronic aluminum overload rats. Considerable karyopycnosis was observed in hippocampal neurons. The SOD activity was weakened and the MDA content increased both significantly. In the hippocampus, Al, Fe, Mn, Cu, and Zn contents increased by 184.1%, 186.1%, 884.2%, 199.4% and 149.2%, respectively. Meloxicam administration (without Al) had no effect compared with the control group, while meloxicam treatment with aluminum exposure significantly protected rats from SLM function impairment, neuron death, lower SOD activity, higher MDA content and brain metal ion imbalance. Our findings suggest that the cerebral metal ion imbalance-related oxidative stress is involved in mechanism of cerebral injury and neurodegeneration induced by chronic Al overload in rats, and that meloxicam protects neurons by reducing metal ion imbalance-related oxidative stress.
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Affiliation(s)
| | | | | | - Huarong Yu
- Department of Pharmacology, Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Medical College Rd, No 1, Chongqing Medical University, Chongqing 400016, P, R, China.
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125
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Du X, Li H, Wang Z, Qiu S, Liu Q, Ni J. Selenoprotein P and selenoprotein M block Zn2+ -mediated Aβ42 aggregation and toxicity. Metallomics 2014; 5:861-70. [PMID: 23652332 DOI: 10.1039/c3mt20282h] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Aggregation and cytotoxicity of the amyloid-β (Aβ) peptide with transition metal ions in neuronal cells have been suggested to be involved in the progression of Alzheimer's disease (AD). A therapeutic strategy to combat this incurable disease is to design chemical agents to target metal-Aβ species. Selenoproteins are a group of special proteins that contain the 21st amino acid Sec in their sequence. Due to the presence of Sec, studies of this group of proteins are basically focused on their roles in regulating redox potential and scavenging reactive oxygen species. Here, we reported that the His-rich domain of selenoprotein P (SelP-H) and the Sec-to-Cys mutant selenoprotein M (SelM') are capable of binding transition metal ions and modulating the Zn(2+)-mediated Aβ aggregation, ROS production and neurotoxicity. SelM' (U48C) and SelP-H were found to coordinate 0.5 and 2 molar equivalents of Zn(2+)/Cd(2+) with micromolar and submicromolar affinities, respectively. Metal binding induced the structural changes in SelP-H and SelM' according to the circular dichorism spectra. Zn(2+) binding to Aβ42 almost completely suppressed Aβ42 fibrillization, which could be significantly restored by SelP-H and SelM', as observed by thioflavin T (ThT) fluorescence and transmission electron microscopy (TEM). Interestingly, both SelP-H and SelM' inhibited Zn(2+)-Aβ42-induced neurotoxicity and the intracellular ROS production in living cells. These studies suggest that SelP and SelM may play certain roles in regulating redox balance as well as metal homeostasis.
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Affiliation(s)
- Xiubo Du
- College of Life Sciences, Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
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126
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Affiliation(s)
- Katja Dralle Mjos
- Medicinal Inorganic Chemistry Group, Department of Chemistry, The University of British Columbia , 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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127
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Perera VS, Wickramaratne NP, Jaroniec M, Huang SD. A Highly Efficient and Extremely Selective Intracellular Copper Detoxifying Agent Based on Nanoparticles of ZnMoS 4. J Mater Chem B 2014; 2:257-261. [PMID: 25821583 PMCID: PMC4372729 DOI: 10.1039/c3tb20962h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Biocompatible ZnMoS4 NPs can selectively remove intracellular copper ions via ion-exchange rather than chelation. This strategy represents a paradigm shift in designing new-generation intracellular metal detoxifying drugs.
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Affiliation(s)
- Vindya S. Perera
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA
| | | | - Mietek Jaroniec
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA
| | - Songping D. Huang
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA
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128
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Mot AI, Wedd AG, Sinclair L, Brown DR, Collins SJ, Brazier MW. Metal attenuating therapies in neurodegenerative disease. Expert Rev Neurother 2014; 11:1717-45. [DOI: 10.1586/ern.11.170] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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129
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Zhai J, Xie X, Bakker E. Ionophore-based ion-exchange emulsions as novel class of complexometric titration reagents. Chem Commun (Camb) 2014; 50:12659-61. [DOI: 10.1039/c4cc05754f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Complexometric titrations rely on a drastic change of the pM value at the equivalence point with a water soluble chelator forming typically 1 : 1 complexes of high stability.
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Affiliation(s)
| | | | - Eric Bakker
- University of Geneva
- 1211 Geneva 4, Switzerland
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130
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Basu Baul TS, Kundu S, Linden A, Raviprakash N, Manna SK, Guedes da Silva MFC. Synthesis and characterization of some water soluble Zn(ii) complexes with (E)-N-(pyridin-2-ylmethylene)arylamines that regulate tumour cell death by interacting with DNA. Dalton Trans 2014; 43:1191-202. [DOI: 10.1039/c3dt52062e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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131
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Yang L, Chen Q, Liu Y, Zhang J, Sun D, Zhou Y, Liu J. Se/Ru nanoparticles as inhibitors of metal-induced Aβ aggregation in Alzheimer's disease. J Mater Chem B 2014; 2:1977-1987. [DOI: 10.1039/c3tb21586e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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132
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Lee S, Zheng X, Krishnamoorthy J, Savelieff MG, Park HM, Brender JR, Kim JH, Derrick JS, Kochi A, Lee HJ, Kim C, Ramamoorthy A, Bowers MT, Lim MH. Rational design of a structural framework with potential use to develop chemical reagents that target and modulate multiple facets of Alzheimer's disease. J Am Chem Soc 2013; 136:299-310. [PMID: 24397771 DOI: 10.1021/ja409801p] [Citation(s) in RCA: 150] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Alzheimer's disease (AD) is characterized by multiple, intertwined pathological features, including amyloid-β (Aβ) aggregation, metal ion dyshomeostasis, and oxidative stress. We report a novel compound (ML) prototype of a rationally designed molecule obtained by integrating structural elements for Aβ aggregation control, metal chelation, reactive oxygen species (ROS) regulation, and antioxidant activity within a single molecule. Chemical, biochemical, ion mobility mass spectrometric, and NMR studies indicate that the compound ML targets metal-free and metal-bound Aβ (metal-Aβ) species, suppresses Aβ aggregation in vitro, and diminishes toxicity induced by Aβ and metal-treated Aβ in living cells. Comparison of ML to its structural moieties (i.e., 4-(dimethylamino)phenol (DAP) and (8-aminoquinolin-2-yl)methanol (1)) for reactivity with Aβ and metal-Aβ suggests the synergy of incorporating structural components for both metal chelation and Aβ interaction. Moreover, ML is water-soluble and potentially brain permeable, as well as regulates the formation and presence of free radicals. Overall, we demonstrate that a rational structure-based design strategy can generate a small molecule that can target and modulate multiple factors, providing a new tool to uncover and address AD complexity.
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Affiliation(s)
- Sanghyun Lee
- Life Sciences Institute, University of Michigan , Ann Arbor, Michigan 48109-2216, United States
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133
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de Freitas LV, da Silva CCP, Ellena J, Costa LAS, Rey NA. Structural and vibrational study of 8-hydroxyquinoline-2-carboxaldehyde isonicotinoyl hydrazone--a potential metal-protein attenuating compound (MPAC) for the treatment of Alzheimer's disease. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 116:41-48. [PMID: 23896296 DOI: 10.1016/j.saa.2013.06.105] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 06/24/2013] [Accepted: 06/28/2013] [Indexed: 05/28/2023]
Abstract
A comprehensive structural and vibrational study of the potential metal-protein attenuating compound 8-hydroxyquinoline-2-carboxaldehyde isonicotinoyl hydrazone is reported. X-ray diffraction data, as well as FT-IR and Raman frequencies, were compared with the respective theoretical values obtained from DFT calculations. Theory agrees well with experiment. In this context, an attempt of total assignment concerning the FT-IR and Raman spectra of the title compound was performed, shedding new light on previous partial assignments published elsewhere.
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Affiliation(s)
- Leonardo Viana de Freitas
- Laboratório de Síntese Orgânica e Química de Coordenação Aplicada a Sistemas Biológicos (LABSO-BIO), Departamento de Química, Centro Técnico Científico (CTC), PUC-Rio, Rua Marquês de São Vicente, 225, 22453-900 Gávea, RJ, Brazil.
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134
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Li M, Xu C, Wu L, Ren J, Wang E, Qu X. Self-assembled peptide-polyoxometalate hybrid nanospheres: two in one enhances targeted inhibition of amyloid β-peptide aggregation associated with Alzheimer's disease. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:3455-3461. [PMID: 23650245 DOI: 10.1002/smll.201202612] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Indexed: 05/28/2023]
Abstract
Amyloid fibril formation is a critical step in Alzheimer's disease (AD) pathogenesis. Inhibition of Aβ aggregation has shown promising against AD and has been used in clinic trials. Here, a novel strategy is reported for the self-assembly of polyoxometalate-peptide (POM@P) hybrid particles as bifunctional Aβ inhibitors. The two-in-one bifunctional POM@P nanoparticles show an enhanced inhibition effect on amyloid aggregation in mice cerebrospinal fluid. Incorporating a clinically used Aβ fibril-staining dye, congo red (CR), into the hybrid colloidal spheres, the nanoparticles can also act as an effective fluorescent probe to monitor the inhibition process of POM@P via CR fluorescence change in real time. It is believed that such flexible organic-inorganic hybrid systems may prompt the design of new multifunctional materials for AD treatment.
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Affiliation(s)
- Meng Li
- Laboratory of Chemical Biology, Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth, Resource Utilization, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun, Jilin 130022, China, Fax: 86-431-85262625
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135
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Hanauske-Abel HM, Saxena D, Palumbo PE, Hanauske AR, Luchessi AD, Cambiaghi TD, Hoque M, Spino M, Gandolfi DD, Heller DS, Singh S, Park MH, Cracchiolo BM, Tricta F, Connelly J, Popowicz AM, Cone RA, Holland B, Pe’ery T, Mathews MB. Drug-induced reactivation of apoptosis abrogates HIV-1 infection. PLoS One 2013; 8:e74414. [PMID: 24086341 PMCID: PMC3781084 DOI: 10.1371/journal.pone.0074414] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Accepted: 08/01/2013] [Indexed: 12/11/2022] Open
Abstract
HIV-1 blocks apoptosis, programmed cell death, an innate defense of cells against viral invasion. However, apoptosis can be selectively reactivated in HIV-infected cells by chemical agents that interfere with HIV-1 gene expression. We studied two globally used medicines, the topical antifungal ciclopirox and the iron chelator deferiprone, for their effect on apoptosis in HIV-infected H9 cells and in peripheral blood mononuclear cells infected with clinical HIV-1 isolates. Both medicines activated apoptosis preferentially in HIV-infected cells, suggesting that the drugs mediate escape from the viral suppression of defensive apoptosis. In infected H9 cells, ciclopirox and deferiprone enhanced mitochondrial membrane depolarization, initiating the intrinsic pathway of apoptosis to execution, as evidenced by caspase-3 activation, poly(ADP-ribose) polymerase proteolysis, DNA degradation, and apoptotic cell morphology. In isolate-infected peripheral blood mononuclear cells, ciclopirox collapsed HIV-1 production to the limit of viral protein and RNA detection. Despite prolonged monotherapy, ciclopirox did not elicit breakthrough. No viral re-emergence was observed even 12 weeks after drug cessation, suggesting elimination of the proviral reservoir. Tests in mice predictive for cytotoxicity to human epithelia did not detect tissue damage or activation of apoptosis at a ciclopirox concentration that exceeded by orders of magnitude the concentration causing death of infected cells. We infer that ciclopirox and deferiprone act via therapeutic reclamation of apoptotic proficiency (TRAP) in HIV-infected cells and trigger their preferential elimination. Perturbations in viral protein expression suggest that the antiretroviral activity of both drugs stems from their ability to inhibit hydroxylation of cellular proteins essential for apoptosis and for viral infection, exemplified by eIF5A. Our findings identify ciclopirox and deferiprone as prototypes of selectively cytocidal antivirals that eliminate viral infection by destroying infected cells. A drug-based drug discovery program, based on these compounds, is warranted to determine the potential of such agents in clinical trials of HIV-infected patients.
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Affiliation(s)
- Hartmut M. Hanauske-Abel
- Department of Biochemistry & Molecular Biology, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
- Department of Pediatrics, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
- Department of Obstetrics, Gynecology & Women’s Health, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
| | - Deepti Saxena
- Department of Pediatrics, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
| | - Paul E. Palumbo
- Department of Pediatrics, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
| | - Axel-Rainer Hanauske
- Oncology Center and Medical Clinic III, Asklepios Clinic St. George, Hamburg, Germany
| | - Augusto D. Luchessi
- Department of Biochemistry & Molecular Biology, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
| | - Tavane D. Cambiaghi
- Department of Biochemistry & Molecular Biology, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
| | - Mainul Hoque
- Department of Biochemistry & Molecular Biology, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
| | - Michael Spino
- Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada
- ApoPharma Inc., Toronto, Ontario, Canada
| | | | - Debra S. Heller
- Department of Pathology & Laboratory Medicine, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
| | - Sukhwinder Singh
- Department of Pathology & Laboratory Medicine, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
| | - Myung Hee Park
- Oral and Pharyngeal Cancer Branch, National Institute for Dental and Craniofacial Research, Bethesda, Maryland, United States of America
| | - Bernadette M. Cracchiolo
- Department of Obstetrics, Gynecology & Women’s Health, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
| | | | | | - Anthony M. Popowicz
- Department of Information Technology, Rockefeller University, New York, New York, United States of America
| | - Richard A. Cone
- Department of Biophysics, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Bart Holland
- Department of Preventive Medicine & Community Health, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
| | - Tsafi Pe’ery
- Department of Biochemistry & Molecular Biology, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
- Department of Medicine, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
| | - Michael B. Mathews
- Department of Biochemistry & Molecular Biology, New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America
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136
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Neuroprotective Role of a Novel Copper Chelator against Aβ 42 Induced Neurotoxicity. Int J Alzheimers Dis 2013; 2013:567128. [PMID: 24159420 PMCID: PMC3789492 DOI: 10.1155/2013/567128] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 07/30/2013] [Accepted: 07/31/2013] [Indexed: 11/18/2022] Open
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disease and associated with the extracellular deposits of amyloid- β peptide in hippocampus region. Metal ions like Cu, Fe and Zn are known to associate with the amyloid beta (A β ) at high concentration and interaction of these ions with soluble and aggregated forms of A β peptide help in development of AD. Here we showed Cu mediated neurotoxicity in the eye tissues of transgenic Drosophila expressing human amyloid β and its rescue through a novel Cu chelator. In this context, we have synthesised and characterized the compound L 2,6-Pyridinedicarboxylic acid, 2,6-bis[2-[(4-carboxyphenyl) methylene] hydrazide] by Mass spectra (MS) and Elemental analysis (EA). The Cu chelation potential of the compound L is tested in vivo in Drosophila. Oral administration of Copper to the transgenic larvae resulted in severe degeneration in eye tissues, which was rescued by the supplementation of compound L. The levels of anti-oxidant markers like SOD and MDA were measured in compound L treated flies and found a significant rescue (P < 0.001). Further rescue of the eye degeneration phenotypes as revealed by SEM affirm the role of copper in A β toxicity. Hence, use of compound L, an amidoamine derivative, could be a possible therapeutic measure for A β induced neurotoxicity.
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137
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Saljooghi AS, Babaie M, Mendi FD, Zahmati M, Saljooghi ZS. Chelation of thallium by combining deferasirox and desferrioxamine in rats. Toxicol Ind Health 2013; 32:83-8. [DOI: 10.1177/0748233713498442] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The hypothesis that two known chelators deferasirox (4-[3,5-bis(2-hydroxyphenyl)-1,2,4-triazol-1-yl]-benzoic acid) and desferrioxamine (DFO) might be more efficient as combined treatment than as monotherapies in removing thallium from the body was tested in a new acute rat model. 7-week-old male Wistar rats received chelators: deferasirox (orally), DFO (intraperitoneal; i.p.), or deferasirox + DFO as 75 or 150 mg/kg dose half an hour after a single i.p. administration of 8 mg thallium/kg body weight in the form of chloride. Serum thallium concentration, urinary thallium, and iron excretions were determined by graphite furnace atomic absorption spectrometry. Both chelators were effective only at the higher dose level, while DFO was more effective than deferasirox in enhancing urinary thallium excretion, deferasirox was more effective than DFO in enhancing urinary iron excretion. In the combined treatment group, deferasirox did not increase the DFO effect on thallium and DFO did not increase the effect of deferasirox on iron elimination. Our results support the usefulness of this animal model for preliminary in vivo testing of thallium chelators. Urinary values were more useful because of the high variability of serum results.
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Affiliation(s)
- Amir Shokooh Saljooghi
- Department of Chemistry, Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran
| | - Maryam Babaie
- Department of Chemistry, Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran
| | - Fatemeh Delavar Mendi
- Department of Chemistry, Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran
| | - Maliheh Zahmati
- Department of Chemistry, Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran
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138
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Jullien AS, Gateau C, Kieffer I, Testemale D, Delangle P. X-ray Absorption Spectroscopy Proves the Trigonal-Planar Sulfur-Only Coordination of Copper(I) with High-Affinity Tripodal Pseudopeptides. Inorg Chem 2013; 52:9954-61. [DOI: 10.1021/ic401206u] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Anne-Solène Jullien
- Service de Chimie Inorganique et Biologique (UMR_E 3 CEA UJF), Commissariat
à l′Energie Atomique et aux Energies Alternatives, INAC, 17 rue des martyrs, 38054 Grenoble Cedex 9, France
| | - Christelle Gateau
- Service de Chimie Inorganique et Biologique (UMR_E 3 CEA UJF), Commissariat
à l′Energie Atomique et aux Energies Alternatives, INAC, 17 rue des martyrs, 38054 Grenoble Cedex 9, France
| | - Isabelle Kieffer
- BM30B/FAME beamline, European Synchotron Radiation Facility (ESRF), F-38043
Grenoble Cedex 9, France
- Observatoire des Sciences de l′Université de Grenoble, UMS 832 CNRS Université Joseph Fourier, F-38041
Grenoble Cedex 9, France
| | - Denis Testemale
- BM30B/FAME beamline, European Synchotron Radiation Facility (ESRF), F-38043
Grenoble Cedex 9, France
- Institut Néel, CNRS et Université Joseph Fourier, BP 166, F-38042 Grenoble Cedex 9, France
| | - Pascale Delangle
- Service de Chimie Inorganique et Biologique (UMR_E 3 CEA UJF), Commissariat
à l′Energie Atomique et aux Energies Alternatives, INAC, 17 rue des martyrs, 38054 Grenoble Cedex 9, France
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139
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Meltzer D, Nadel Y, Lecka J, Amir A, Sévigny J, Fischer B. Nucleoside-(5'→P) methylenebisphosphonodithioate analogues: synthesis and chemical properties. J Org Chem 2013; 78:8320-9. [PMID: 23895237 DOI: 10.1021/jo400931n] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Nucleoside-(5'→P) methylenebisphosphonodithioate analogues are bioisosteres of natural nucleotides. The potential therapeutic applications of these analogues are limited by their relative instability. With a view toward improving their chemical and metabolic stability as well as their affinity toward zinc ions, we developed a novel nucleotide scaffold, nucleoside-5'-tetrathiobisphosphonate. We synthesized P1-(uridine/adenosine-5')-methylenebisphosphonodithioate, 2 and 3, and P1,P2-di(uridine/adenosine-5')-methylenebisphosphonodithioate, 4 and 5. Using (1)H and (31)P NMR-monitored Zn(2+)/Mg(2+) titrations, we found that 5 coordinated Zn(2+) by both N7 nitrogen atoms and both dithiophosphonate moieties, whereas 3 coordinated Zn(2+) by an N7 nitrogen atom and Pβ. Both 3 and 5 did not coordinate Mg(2+) ions. (31)P NMR-monitored kinetic studies showed that 3 was more stable at pD 1.5 than 5, with t(1/2) of 44 versus 9 h, respectively, and at pD 11 both showed no degradation for at least 2 weeks. However, 5 was more stable than 3 under an air-oxidizing atmosphere, with t1/2 of at least 3 days versus 14 h, respectively. Analogues 3 and 5 were highly stable to NPP1,3 and NTPDase1,2,3,8 hydrolysis (0-7%). However, they were found to be poor ectonucleotidase inhibitors. Although 3 and 5 did not prove to be effective inhibitors of zinc-containing NPP1/3, which is involved in the pathology of osteoarthritis and diabetes, they may be promising zinc chelators for the treatment of other health disorders involving an excess of zinc ions.
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Affiliation(s)
- Diana Meltzer
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel
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140
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Peterson KL, Margherio MJ, Doan P, Wilke KT, Pierre VC. Basis for sensitive and selective time-delayed luminescence detection of hydroxyl radical by lanthanide complexes. Inorg Chem 2013; 52:9390-8. [PMID: 23889495 DOI: 10.1021/ic4009569] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Molecular probes for the detection of hydroxyl radical (HO•) by time-delayed luminescence spectroscopy directly in water at neutral pH with high sensitivity and selectivity are presented. The bimolecular probes consist of a lanthanide complex with open coordination sites and a reactive pre-antenna composed of an aromatic acid or amide; the latter binds to and sensitizes terbium emission upon hydroxylation by HO•. These probes exhibit long luminescence lifetimes compatible with time-delayed measurements that remove interfering background fluorescence from the sample. Six different reactive pre-antenna (benzoate, benzamide, isophthalate, isophthalamide, trimesate, and trimesamide) and two different terbium complexes [Tb-(1,4,7,10-tetraazacyclododecane-1,4,7-tris(acetic acid)) (Tb-DO3A) and Tb-(1,4,7,10-tetraazacyclododecane-1,7-bis(acetic acid)) (Tb-DO2A)] were evaluated. Of these the trimesamide/Tb-DO3A system enables the most sensitive detection of HO• with an about 1000-fold increase in metal-centered time-delayed emission upon hydroxylation of the pre-antenna to 2-hydroxytrimesamide. Excellent selectivity for both the trimesamide/Tb-DO3A and trimesate/Tb-DO3A systems over other reactive oxygen and nitrogen species are observed. Notably, the increase in metal-centered luminescence intensity is not associated with a decrease in the hydration number (q) of Tb-DO3A, suggesting that the antenna is interacting with the lanthanide via a second sphere coordination environment or that coordination by the antenna occurs by displacement of one or more of the carboxylate arms of DO3A. Formation of a weak ternary complex Tb-DO3A•hydroxytrimesamide was confirmed by temperature-dependent titration and a decrease in K(app) with increasing temperature.
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Affiliation(s)
- Katie L Peterson
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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141
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Weitz EA, Lewandowski C, Smolensky ED, Marjańska M, Pierre VC. A magnetoplasmonic imaging agent for copper(I) with dual response by MRI and dark field microscopy. ACS NANO 2013; 7:5842-5849. [PMID: 23746216 PMCID: PMC3733671 DOI: 10.1021/nn400928z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We present the design and synthesis of a responsive magnetoplasmonic assembly for copper(I) which allows monitoring of the concentration of the metal both in three dimensions by magnetic resonance imaging and with high spatial resolution by dark field microscopy. The probe consists of azide-functionalized iron oxide nanoparticles 11.6 nm in diameter and acetylene-terminated gold nanoparticles 44 nm in diameter that form three-dimensional networks of intermingled magnetic and plasmonic nanoparticles in the presence of copper. This aggregation results in a decrease in longitudinal relaxivity, and an initial increase followed by a sharp decrease in transverse relaxivity, a change observable both by T1- and T2-weighted images, concomitantly with a decrease of surface plasmon resonance intensity.
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Affiliation(s)
- Evan A. Weitz
- Department of Chemistry, University of Minnesota, Minneapolis MN 55455, USA
| | - Cutler Lewandowski
- Department of Chemistry, University of Minnesota, Minneapolis MN 55455, USA
| | - Eric D. Smolensky
- Department of Chemistry, University of Minnesota, Minneapolis MN 55455, USA
| | - Małgorzata Marjańska
- Center for Magnetic Resonance Research and Department of Radiology, University ofMinnesota, Minneapolis MN 55455, USA
| | - Valérie C. Pierre
- Department of Chemistry, University of Minnesota, Minneapolis MN 55455, USA
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142
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Dwivedi AK, Iyer PK. Therapeutic Strategies to Prevent Alzheimer's Disease Pathogenesis Using A Fluorescent Conjugated Polyelectrolyte. Macromol Biosci 2013; 14:508-14. [DOI: 10.1002/mabi.201300107] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Revised: 04/02/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Atul K. Dwivedi
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781 039 Assam India
| | - Parameswar K. Iyer
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781 039 Assam India
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143
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Liu Y, Kochi A, Pithadia AS, Lee S, Nam Y, Beck MW, He X, Lee D, Lim MH. Tuning Reactivity of Diphenylpropynone Derivatives with Metal-Associated Amyloid-β Species via Structural Modifications. Inorg Chem 2013; 52:8121-30. [DOI: 10.1021/ic400851w] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | | | | | | | - Younwoo Nam
- Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 139-743, Korea
| | | | | | - Dongkuk Lee
- Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 139-743, Korea
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144
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Metal Species in Biology: Bottom-Up and Top-Down LC Approaches in Applied Toxicological Research. ACTA ACUST UNITED AC 2013. [DOI: 10.1155/2013/801840] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Since the inception of liquid chromatography (LC) more than 100 years ago this separation technique has been developed into a powerful analytical tool that is frequently applied in life science research. To this end, unique insights into the interaction of metal species (throughout this manuscript “metal species” refers to “toxic metals, metalloid compounds, and metal-based drugs” and “toxic metals” to “toxic metals and metalloid compounds”) with endogenous ligands can be obtained by using LC approaches that involve their hyphenation with inductively coupled plasma-based element specific detectors. This review aims to provide a synopsis of the different LC approaches which may be employed to advance our understanding of these interactions either in a “bottom-up” or a “top-down” manner. In the “bottom-up” LC-configuration, endogenous ligands are introduced into a physiologically relevant mobile phase buffer, and the metal species of interest is injected. Subsequent “interrogation” of the on-column formed complex(es) by employing a suitable separation mechanism (e.g., size exclusion chromatography or reversed-phase LC) while changing the ligand concentration(s), the column temperature or the pH can provide valuable insight into the formation of complexes under near physiological conditions. This approach allows to establish the relative stability and hydrophobicity of metal-ligand complexes as well as the dynamic coordination of a metal species (injected) to two ligands (dissolved in the mobile phase). Conversely, the “top-down” analysis of a biological fluid (e.g., blood plasma) by LC (e.g., using size exclusion chromatography) can be used to determine the size distribution of endogenous metalloproteins which are collectively referred to as the “metalloproteome”. This approach can provide unique insight into the metabolism and the plasma protein binding of metal species, and can simultaneously visualize the dose-dependent perturbation of the metalloproteome by a particular metal species. The concerted application of these LC approaches is destined to provide new insight into biochemical processes which represent an important starting point to advance human health in the 21st century.
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145
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Cao YY, Wang L, Ge H, Lu XL, Pei Z, Gu Q, Xu J. Salvianolic acid A, a polyphenolic derivative from Salvia miltiorrhiza bunge, as a multifunctional agent for the treatment of Alzheimer’s disease. Mol Divers 2013; 17:515-24. [DOI: 10.1007/s11030-013-9452-z] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 05/06/2013] [Indexed: 02/06/2023]
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146
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Lincoln KM, Gonzalez P, Richardson TE, Julovich DA, Saunders R, Simpkins JW, Green KN. A potent antioxidant small molecule aimed at targeting metal-based oxidative stress in neurodegenerative disorders. Chem Commun (Camb) 2013; 49:2712-4. [PMID: 23437435 PMCID: PMC4446701 DOI: 10.1039/c2cc36808k] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Metal-ion misregulation and oxidative stress have been linked to the progressive neurological decline associated with multiple neurodegenerative disorders. Transition metal-mediated oxidation of biomolecules via Fenton chemical reactions plays a role in disease progression. Herein we report the synthesis, characterization and antioxidant activity of 2; a pyclen derivative with enhanced antioxidant character.
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Affiliation(s)
- Kimberly M. Lincoln
- Department of Chemistry, Texas Christian University, 2800 S. University, Ft. Worth, US. Fax: 817 257 5851; Tel: 817 257 6220
| | - Paulina Gonzalez
- Department of Chemistry, Texas Christian University, 2800 S. University, Ft. Worth, US. Fax: 817 257 5851; Tel: 817 257 6220
| | - Timothy E. Richardson
- Institute for Aging and Alzheimer’s Disease Research, Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, 3500 Camp Bowie, Ft. Worth, USA. Fax: 817 735 2091; Tel: 817 735 0498
| | - David A. Julovich
- Institute for Aging and Alzheimer’s Disease Research, Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, 3500 Camp Bowie, Ft. Worth, USA. Fax: 817 735 2091; Tel: 817 735 0498
| | - Ryker Saunders
- Department of Chemistry, Texas Christian University, 2800 S. University, Ft. Worth, US. Fax: 817 257 5851; Tel: 817 257 6220
| | - James W. Simpkins
- Institute for Aging and Alzheimer’s Disease Research, Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, 3500 Camp Bowie, Ft. Worth, USA. Fax: 817 735 2091; Tel: 817 735 0498
| | - Kayla N. Green
- Department of Chemistry, Texas Christian University, 2800 S. University, Ft. Worth, US. Fax: 817 257 5851; Tel: 817 257 6220
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147
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Synthesis of 3-benzazepines and azepino[4,5-b]heterocyclic ring systems via intramolecular Friedel–Crafts cyclization. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.02.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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148
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Ramos ML, Justino LL, Branco A, Fonseca SM, Burrows HD. Theoretical and experimental insights into the complexation of 8-hydroxyquinoline-5-sulfonate with divalent ions of Group 12 metals. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.07.074] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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149
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Amir A, Sayer AH, Ezra A, Fischer B. Methylenediphosphonotetrathioate: Synthesis, Characterization, and Chemical Properties. Inorg Chem 2013; 52:3133-40. [DOI: 10.1021/ic3026057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aviran Amir
- Department of Chemistry, Bar Ilan University, Ramat-Gan 52900, Israel
| | - Alon Haim Sayer
- Department of Chemistry, Bar Ilan University, Ramat-Gan 52900, Israel
| | - Alon Ezra
- Department of Chemistry, Bar Ilan University, Ramat-Gan 52900, Israel
| | - Bilha Fischer
- Department of Chemistry, Bar Ilan University, Ramat-Gan 52900, Israel
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150
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Ramos ML, Justino LLG, Salvador AIN, de Sousa ARE, Abreu PE, Fonseca SM, Burrows HD. NMR, DFT and luminescence studies of the complexation of Al(III) with 8-hydroxyquinoline-5-sulfonate. Dalton Trans 2013; 41:12478-89. [PMID: 22955198 DOI: 10.1039/c2dt31381b] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Multinuclear ((1)H, (13)C and (27)Al) magnetic resonance spectroscopy (1D and 2D), DFT calculations and fluorescence have been used to study the complexation of 8-hydroxyquinoline-5-sulfonate (8-HQS) with Al(III). The study combines the high sensitivity of luminescence techniques, the selectivity of multinuclear NMR spectroscopy with the structural details accessible through DFT calculations, and aims to provide a detailed understanding of the complexation between the Al(3+) ion and 8-HQS. A full speciation study has been performed and over the concentration region studied, the Al(3+) ion forms complexes with 8-HQS in an aqueous solution in the pH range 2-6. At higher pH, the extensive hydrolysis of the metal limits complexation. Using Job's method, three complexes were detected, with 1 : 1, 1 : 2 and 1 : 3 (metal : ligand) stoichiometries. These results are in agreement with those previously reported using potentiometric and electrochemical techniques. The geometries of the complexes are proposed based on the combination of NMR results with optimized DFT calculations. All the complexes in aqueous solutions at 25 °C are mononuclear species, and have an approximately octahedral geometry with the metal coordinated to one molecule of 8-HQS and four molecules of water (1 : 1 complex), two molecules of 8-HQS and two molecules of water mutually cis (1 : 2 complex), and to three molecules of 8-HQS in non-symmetrical arrangement (mer-isomer), for the 1 : 3 (metal : ligand) complex. On binding to Al(III), 8-HQS shows a more marked fluorescence than the weakly fluorescent free ligand. In addition, as previously noted, there are marked changes in the absorption spectra, which support the use of 8-HQS as a sensitive optical sensor to detect Al(3+) metal ions in surface waters and biological fluids. These complexes also show potential for applications in organic light emitting diodes (OLEDs).
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Affiliation(s)
- M Luísa Ramos
- Departamento de Química, Universidade de Coimbra, 3004-535 Coimbra, Portugal.
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