151
|
Metals and Neuronal Metal Binding Proteins Implicated in Alzheimer's Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:9812178. [PMID: 26881049 PMCID: PMC4736980 DOI: 10.1155/2016/9812178] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 12/17/2015] [Indexed: 11/18/2022]
Abstract
Alzheimer's disease (AD) is the most prevalent age-related dementia affecting millions of people worldwide. Its main pathological hallmark feature is the formation of insoluble protein deposits of amyloid-β and hyperphosphorylated tau protein into extracellular plaques and intracellular neurofibrillary tangles, respectively. Many of the mechanistic details of this process remain unknown, but a well-established consequence of protein aggregation is synapse dysfunction and neuronal loss in the AD brain. Different pathways including mitochondrial dysfunction, oxidative stress, inflammation, and metal metabolism have been suggested to be implicated in this process. In particular, a body of evidence suggests that neuronal metal ions such as copper, zinc, and iron play important roles in brain function in health and disease states and altered homeostasis and distribution as a common feature across different neurodegenerative diseases and aging. In this focused review, we overview neuronal proteins that are involved in AD and whose metal binding properties may underlie important biochemical and regulatory processes occurring in the brain during the AD pathophysiological process.
Collapse
|
152
|
Hare DJ, Rembach A, Roberts BR. The Emerging Role of Metalloproteomics in Alzheimer's Disease Research. Methods Mol Biol 2016; 1303:379-89. [PMID: 26235079 DOI: 10.1007/978-1-4939-2627-5_22] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Metals are increasingly recognized to have an important role in molecular processes underlying Alzheimer's disease (AD). This chapter discusses the current role of metals in AD and expands on the development of metalloproteomics and how the recent advances in analytical technology will allow detailed investigation of metalloproteins. Investigation of individual metalloproteins will yield new mechanistic details about the role of metals in AD.
Collapse
Affiliation(s)
- Dominic J Hare
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, 30 Royal Parade, Parkville, VIC, 3052, Australia
| | | | | |
Collapse
|
153
|
Li X, Dong X, Liu Y, Meng Y, Zhang Y, Zhang D, Liu C. Ultraviolet irradiation-mediated formation of Aβ42 oligomers and reactive oxygen species in Zn2+-bound Aβ42 aggregates irrespective of the removal of Zn2+. NEW J CHEM 2016. [DOI: 10.1039/c6nj02004f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The controlled UV light exposure converts redox-inert Zn2+-bound Aβ42 aggregates into cytotoxic Aβ42 oligomers and reactive oxygen species.
Collapse
Affiliation(s)
- Xiang Li
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education, and School of Chemistry
- Central China Normal University
- Wuhan 430079
- People's Republic of China
| | - Xiongwei Dong
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education, and School of Chemistry
- Central China Normal University
- Wuhan 430079
- People's Republic of China
| | - Yaojing Liu
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education, and School of Chemistry
- Central China Normal University
- Wuhan 430079
- People's Republic of China
| | - Yan Meng
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education, and School of Chemistry
- Central China Normal University
- Wuhan 430079
- People's Republic of China
| | - Yong Zhang
- School of Chemical and Materials Engineering
- Hubei Polytechnic University
- Huangshi 435003
- People's Republic of China
| | - Dan Zhang
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education, and School of Chemistry
- Central China Normal University
- Wuhan 430079
- People's Republic of China
| | - Changlin Liu
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education, and School of Chemistry
- Central China Normal University
- Wuhan 430079
- People's Republic of China
| |
Collapse
|
154
|
Dai Y, Liu X, Wang P, Fu J, Yao K, Xu K. A new fluorescent probe based on quinoline for detection of Al3+ and Fe3+ with “off–on–off” response in aqueous solution. RSC Adv 2016. [DOI: 10.1039/c6ra23296e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new quinoline-based fluorescent probe has been designed and synthesized. It showed highly selective relay recognition of Al3+ and Fe3+via a fluorescence “off–on–off” mechanism by central metal displacement.
Collapse
Affiliation(s)
- Yanpeng Dai
- Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- China
| | - Xiaoyan Liu
- Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- China
| | - Peng Wang
- Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- China
| | - Jiaxin Fu
- Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- China
| | - Kun Yao
- Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- China
| | - Kuoxi Xu
- Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- China
| |
Collapse
|
155
|
Torres JB, Andreozzi EM, Dunn JT, Siddique M, Szanda I, Howlett DR, Sunassee K, Blowera PJ. PET Imaging of Copper Trafficking in a Mouse Model of Alzheimer Disease. J Nucl Med 2016; 57:109-14. [PMID: 26449834 PMCID: PMC6207347 DOI: 10.2967/jnumed.115.162370] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Accepted: 09/28/2015] [Indexed: 01/23/2023] Open
Abstract
UNLABELLED Alzheimer disease (AD) is a fatal neurodegenerative disorder characterized by progressive neuronal loss and cognitive decline. The lack of reliable and objective diagnostic markers for AD hampers early disease detection and treatment. Growing evidence supports the existence of a dysregulation in brain copper trafficking in AD. The aim of this study was to investigate brain copper trafficking in a transgenic mouse model of AD by PET imaging with (64)Cu, to determine its potential as a diagnostic biomarker of the disorder. METHODS Brain copper trafficking was evaluated in 6- to 8-mo-old TASTPM transgenic mice and age-matched wild-type controls using the (64)Cu bis(thiosemicarbazone) complex (64)Cu-GTSM (glyoxalbis(N(4)-methyl-3-thiosemicarbazonato) copper(II)), which crosses the blood-brain barrier and releases (64)Cu bioreductively into cells. Animals were intravenously injected with (64)Cu-GTSM and imaged at 0-30 min and 24-25 h after injection. The images were analyzed by atlas-based quantification and texture analysis. Regional distribution of (64)Cu in the brain 24 h after injection was also evaluated via ex vivo autoradiography and compared with amyloid-β plaque deposition in TASTPM mice. RESULTS Compared with controls, in TASTPM mice PET image analysis demonstrated significantly increased (by a factor of ~1.3) brain concentration of (64)Cu at 30 min (P < 0.01) and 24 h (P < 0.05) after injection of the tracer and faster (by a factor of ~5) (64)Cu clearance from the brain (P < 0.01). Atlas-based quantification and texture analysis revealed significant differences in regional brain uptake of (64)Cu and PET image heterogeneity between the 2 groups of mice. Ex vivo autoradiography showed that regional brain distribution of (64)Cu at 24 h after injection did not correlate with amyloid-β plaque distribution in TASTPM mice. CONCLUSION The trafficking of (64)Cu in the brain after administration of (64)Cu-GTSM is significantly altered by AD-like pathology in the TASTPM mouse model, suggesting that (64)Cu-GTSM PET imaging warrants clinical evaluation as a diagnostic tool for AD and possibly other neurodegenerative disorders.
Collapse
Affiliation(s)
- Julia Baguña Torres
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, St. Thomas’ Hospital, London, SE1 7EH, UK
| | - Erica M. Andreozzi
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, St. Thomas’ Hospital, London, SE1 7EH, UK
| | - Joel T. Dunn
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, St. Thomas’ Hospital, London, SE1 7EH, UK
| | - Muhammad Siddique
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, St. Thomas’ Hospital, London, SE1 7EH, UK
| | - Istvan Szanda
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, St. Thomas’ Hospital, London, SE1 7EH, UK
| | - David R. Howlett
- King’s College London, Wolfson Centre for Age-Related Diseases, Hodgkin Building, Guy’s Campus, London, SE1 1UL, UK
| | - Kavitha Sunassee
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, St. Thomas’ Hospital, London, SE1 7EH, UK
| | - Philip J. Blowera
- King’s College London, Division of Imaging Sciences and Biomedical Engineering, St. Thomas’ Hospital, London, SE1 7EH, UK
| |
Collapse
|
156
|
Jing M, Liu Y, Song W, Yan Y, Yan W, Liu R. Oxidative damage induced by copper in mouse primary hepatocytes by single-cell analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:1335-1343. [PMID: 26358217 DOI: 10.1007/s11356-015-5360-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Accepted: 09/02/2015] [Indexed: 06/05/2023]
Abstract
Copper can disturb the intracellular redox balance, induce oxidative stress, and subsequently cause irreversible damage, leading to a variety of diseases. In the present study, mouse primary hepatocytes were chosen to elucidate the in vitro oxidative damage of short-term copper exposure (10-200 μM) by single-cell analysis. We evaluated the toxicity of copper by reactive oxygen species (ROS), glutathione (GSH), and oxidative DNA damage at the single-cell level. Oxidative damage induced by copper was verified by the morphological changes, persistent elevations of excessive ROS and malondialdehyde (MDA), a decrease in GSH level, and the oxidative DNA damage. Furthermore, the average ROS generation, GSH consumption, and the indicators in DNA damage did not significantly change at relatively low concentrations (10 or 50 μM), but we can find the alterations of parameters in some single cells clearly. Emphasis on the analysis of single cells is conducive to gain a better understanding on the toxicity of copper. This study will also complement studies on the environmental risk assessment of copper pollution.
Collapse
Affiliation(s)
- Mingyang Jing
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 27# Shanda South Road, Jinan, 250100, People's Republic of China
| | - Yang Liu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 27# Shanda South Road, Jinan, 250100, People's Republic of China
| | - Wei Song
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 27# Shanda South Road, Jinan, 250100, People's Republic of China
| | - Yunxing Yan
- State Key Laboratory of Crystal Materials, Shandong University, 27 Shandanan Road, Jinan, 250100, People's Republic of China
| | - Wenbao Yan
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 27# Shanda South Road, Jinan, 250100, People's Republic of China
| | - Rutao Liu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 27# Shanda South Road, Jinan, 250100, People's Republic of China.
| |
Collapse
|
157
|
Jin H, Goyal P, Das AK, Gaus M, Meuwly M, Cui Q. Copper Oxidation/Reduction in Water and Protein: Studies with DFTB3/MM and VALBOND Molecular Dynamics Simulations. J Phys Chem B 2015; 120:1894-910. [PMID: 26624804 DOI: 10.1021/acs.jpcb.5b09656] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We apply two recently developed computational methods, DFTB3 and VALBOND, to study copper oxidation/reduction processes in solution and protein. The properties of interest include the coordination structure of copper in different oxidation states in water or in a protein (plastocyanin) active site, the reduction potential of the copper ion in different environments, and the environmental response to copper oxidation. The DFTB3/MM and VALBOND simulation results are compared to DFT/MM simulations and experimental results whenever possible. For a copper ion in aqueous solution, DFTB3/MM results are generally close to B3LYP/MM with a medium basis, including both solvation structure and reduction potential for Cu(II); for Cu(I), however, DFTB3/MM finds a two-water coordination, similar to previous Born-Oppenheimer molecular dynamics simulations using BLYP and HSE, whereas B3LYP/MM leads to a tetrahedron coordination. For a tetraammonia copper complex in aqueous solution, VALBOND and DFTB3/MM are consistent in terms of both structural and dynamical properties of solvent near copper for both oxidation states. For copper reduction in plastocyanin, DFTB3/MM simulations capture the key properties of the active site, and the computed reduction potential and reorganization energy are in fair agreement with experiment, especially when the periodic boundary condition is used. Overall, the study supports the value of VALBOND and DFTB3(/MM) for the analysis of fundamental copper redox chemistry in water and protein, and the results also help highlight areas where further improvements in these methods are desirable.
Collapse
Affiliation(s)
- Haiyun Jin
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Puja Goyal
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Akshaya Kumar Das
- Department of Chemistry, University of Basel , Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Michael Gaus
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Markus Meuwly
- Department of Chemistry, University of Basel , Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Qiang Cui
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| |
Collapse
|
158
|
Korshavn KJ, Jang M, Kwak YJ, Kochi A, Vertuani S, Bhunia A, Manfredini S, Ramamoorthy A, Lim MH. Reactivity of Metal-Free and Metal-Associated Amyloid-β with Glycosylated Polyphenols and Their Esterified Derivatives. Sci Rep 2015; 5:17842. [PMID: 26657338 PMCID: PMC4674742 DOI: 10.1038/srep17842] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Accepted: 11/05/2015] [Indexed: 12/19/2022] Open
Abstract
Both amyloid-β (Aβ) and transition metal ions are shown to be involved in the pathogenesis of Alzheimer's disease (AD), though the importance of their interactions remains unclear. Multifunctional molecules, which can target metal-free and metal-bound Aβ and modulate their reactivity (e.g., Aβ aggregation), have been developed as chemical tools to investigate their function in AD pathology; however, these compounds generally lack specificity or have undesirable chemical and biological properties, reducing their functionality. We have evaluated whether multiple polyphenolic glycosides and their esterified derivatives can serve as specific, multifunctional probes to better understand AD. The ability of these compounds to interact with metal ions and metal-free/-associated Aβ, and further control both metal-free and metal-induced Aβ aggregation was investigated through gel electrophoresis with Western blotting, transmission electron microscopy, UV-Vis spectroscopy, fluorescence spectroscopy, and NMR spectroscopy. We also examined the cytotoxicity of the compounds and their ability to mitigate the toxicity induced by both metal-free and metal-bound Aβ. Of the polyphenols investigated, the natural product (Verbascoside) and its esterified derivative (VPP) regulate the aggregation and cytotoxicity of metal-free and/or metal-associated Aβ to different extents. Our studies indicate Verbascoside represents a promising structure for further multifunctional tool development against both metal-free Aβ and metal-Aβ.
Collapse
Affiliation(s)
- Kyle J. Korshavn
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Milim Jang
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
| | - Yeon Ju Kwak
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
| | - Akiko Kochi
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
| | - Silvia Vertuani
- Department of Life Sciences and Biotechnology, University of Ferrara, I-44121 Ferrara, Italy
| | - Anirban Bhunia
- Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII(M), Kolkata 700054, India
| | - Stefano Manfredini
- Department of Life Sciences and Biotechnology, University of Ferrara, I-44121 Ferrara, Italy
| | - Ayyalusamy Ramamoorthy
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
- Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Mi Hee Lim
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
| |
Collapse
|
159
|
Hu B, Dai F, Fan Z, Ma G, Tang Q, Zhang X. Nanotheranostics: Congo Red/Rutin-MNPs with Enhanced Magnetic Resonance Imaging and H2O2-Responsive Therapy of Alzheimer's Disease in APPswe/PS1dE9 Transgenic Mice. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:5499-5505. [PMID: 26270904 DOI: 10.1002/adma.201502227] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 07/08/2015] [Indexed: 06/04/2023]
Abstract
As nanotheranostics, Congo red/Rutin-MNPs combine the abilities of diagnosis and treatment of Alzheimer's disease (AD). The biocompatible nanotheranostics system based on iron oxide magnetic nanoparticles, with ultrasmall size and excellent magnetic properties, can specifically detect amyloid plaques by magnetic resonance imaging, realize targeted delivery of AD therapeutic agents, achieve drug controlled release by H2O2 response, and prevent oxidative stress.
Collapse
Affiliation(s)
- Bingbing Hu
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Institute of Materials Science and Engineering, Ocean University of China, Qingdao, 266100, P. R. China
| | - Fengying Dai
- Beijing Center for Physical and Chemical Analysis, Beijing, 100084, P. R. China
| | - Zhanming Fan
- Department of Radioloy, Beijing Anzhen Hospital, Capital University, Beijing, 100029, P. R. China
| | - Guanghui Ma
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Qunwei Tang
- Institute of Materials Science and Engineering, Ocean University of China, Qingdao, 266100, P. R. China
| | - Xin Zhang
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| |
Collapse
|
160
|
Han S, Zhao B, Pan X, Song Z, Liu J, Gong Y, Wang M. Estrogen receptor variant ER-α36 is involved in estrogen neuroprotection against oxidative toxicity. Neuroscience 2015; 310:224-41. [PMID: 26383254 DOI: 10.1016/j.neuroscience.2015.09.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 09/05/2015] [Accepted: 09/09/2015] [Indexed: 10/23/2022]
Abstract
It is well known that estrogen exerts neuroprotective effect against various neuronal damages. However, the estrogen receptor (ER) that mediates estrogen neuroprotection has not been well established. In this study, we investigated the potential receptor that mediates estrogen neuroprotection and the underlying molecular mechanisms. Hydrogen peroxide (H2O2) was chosen as an agent in our study to mimic free radicals that are often involved in the pathogenesis of many degenerative diseases. We found that in human SY5Y and IMR-32 cells, the estrogen neuroprotection against H2O2 toxicity was abrogated by knockdown of a variant of estrogen receptor-α, ER-α36. We also studied the rapid estrogen signaling mediated by ER-α36 in neuroprotective effect and found the PI3K/AKT and MAPK/ERK1/2 signaling mediated by ER-α36 is involved in estrogen neuroprotection. We also found that GPER, an orphan G protein-coupled receptor, is not involved in ER-α36-mediated rapid estrogen response. Our study thus demonstrates that ER-α36-mediated rapid estrogen signaling is involved in the neuroprotection activity of estrogen against oxidative toxicity.
Collapse
Affiliation(s)
- S Han
- Department of Genetics and Key Laboratory for Experimental Teratology of the Ministry of Education, Shandong University, Jinan 250012, Shandong, China.
| | - B Zhao
- Department of Genetics and Key Laboratory for Experimental Teratology of the Ministry of Education, Shandong University, Jinan 250012, Shandong, China.
| | - X Pan
- Department of Breast and Thyroid Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China.
| | - Z Song
- Department of Genetics and Key Laboratory for Experimental Teratology of the Ministry of Education, Shandong University, Jinan 250012, Shandong, China.
| | - J Liu
- Department of Genetics and Key Laboratory for Experimental Teratology of the Ministry of Education, Shandong University, Jinan 250012, Shandong, China.
| | - Y Gong
- Department of Genetics and Key Laboratory for Experimental Teratology of the Ministry of Education, Shandong University, Jinan 250012, Shandong, China.
| | - M Wang
- Department of Genetics and Key Laboratory for Experimental Teratology of the Ministry of Education, Shandong University, Jinan 250012, Shandong, China.
| |
Collapse
|
161
|
Dong X, Zhang Z, Zhao D, Liu Y, Meng Y, Zhang Y, Zhang D, Liu C. Ultraviolet light triggers the conversion of Cu2+-bound Aβ42 aggregates into cytotoxic species in a copper chelation-independent manner. Sci Rep 2015; 5:13897. [PMID: 26350232 PMCID: PMC4563556 DOI: 10.1038/srep13897] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 07/10/2015] [Indexed: 12/19/2022] Open
Abstract
Increasing evidence indicates that abnormal Cu2+ binding to Aβ peptides are responsible for the formation of soluble Aβ oligomers and ROS that play essential roles in AD pathogenesis. During studying the Cu2+-chelating treatment of Cu2+-bound Aβ42 aggregates, we found that UV light exposure pronouncedly enhances cytotoxicity of the chelator-treated and -untreated Cu2+-bound Aβ42 aggregates. This stimulated us to thoroughly investigate (1) either the chelation treatment or UV light exposure leads to the increased cytotoxicity of the aggregates, and (2) why the chelator-treated and -untreated Cu2+-bound Aβ42 aggregates exhibit the increased cytotoxicity following UV light exposure if the latter is the case. The data indicated that the controlled UV exposure induced the dissociation of Cu2+-free and -bound Aβ42 aggregates into SDS-stable soluble oligomers and the production of ROS including H2O2 in an UV light intensity- and time-dependent, but Cu2+ chelation-independent manner. Although we can't fully understand the meaning of this finding at the current stage, the fact that the UV illuminated Aβ42 aggregates can efficiently kill HeLa cells implies that the aggregates after UV light exposure could be used to decrease the viability of skin cancer cells through skin administration.
Collapse
Affiliation(s)
- Xiongwei Dong
- Key Laboratory of Pesticide &Chemical Biology, Ministry of Education, and School of Chemistry, Central China Normal University, Wuhan 430079, Hubei
| | - Zhe Zhang
- Key Laboratory of Pesticide &Chemical Biology, Ministry of Education, and School of Chemistry, Central China Normal University, Wuhan 430079, Hubei
| | - Dan Zhao
- Key Laboratory of Pesticide &Chemical Biology, Ministry of Education, and School of Chemistry, Central China Normal University, Wuhan 430079, Hubei
| | - Yaojing Liu
- Key Laboratory of Pesticide &Chemical Biology, Ministry of Education, and School of Chemistry, Central China Normal University, Wuhan 430079, Hubei
| | - Yan Meng
- Key Laboratory of Pesticide &Chemical Biology, Ministry of Education, and School of Chemistry, Central China Normal University, Wuhan 430079, Hubei
| | - Yong Zhang
- School of Chemical and Materials Engineering, Hubei Polytechnic University, Huangshi, 435003 Hubei, China
| | - Dan Zhang
- Key Laboratory of Pesticide &Chemical Biology, Ministry of Education, and School of Chemistry, Central China Normal University, Wuhan 430079, Hubei
| | - Changlin Liu
- Key Laboratory of Pesticide &Chemical Biology, Ministry of Education, and School of Chemistry, Central China Normal University, Wuhan 430079, Hubei
| |
Collapse
|
162
|
Gaus M, Jin H, Demapan D, Christensen AS, Goyal P, Elstner M, Cui Q. DFTB3 Parametrization for Copper: The Importance of Orbital Angular Momentum Dependence of Hubbard Parameters. J Chem Theory Comput 2015; 11:4205-19. [PMID: 26575916 PMCID: PMC4827604 DOI: 10.1021/acs.jctc.5b00600] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the parametrization of a density functional tight binding method (DFTB3) for copper in a spin-polarized formulation. The parametrization is consistent with the framework of 3OB for main group elements (ONCHPS) and can be readily used for biological applications that involve copper proteins/peptides. The key to our parametrization is to introduce orbital angular momentum dependence of the Hubbard parameter and its charge derivative, thus allowing the 3d and 4s orbitals to adopt different sizes and responses to the change of charge state. The parametrization has been tested by applying to a fairly broad set of molecules of biological relevance, and the properties of interest include optimized geometries, ligand binding energies, and ligand proton affinities. Compared to the reference QM level (B3LYP/aug-cc-pVTZ, which is shown here to be similar to the B97-1 and CCSD(T) results, in terms of many properties of interest for a set of small copper containing molecules), our parametrization generally gives reliable structural properties for both Cu(I) and Cu(II) compounds, although several exceptions are also noted. For energetics, the results are more accurate for neutral ligands than for charged ligands, likely reflecting the minimal basis limitation of DFTB3; the results generally outperform NDDO based methods such as PM6 and even PBE with the 6-31+G(d,p) basis. For all ligand types, single-point B3LYP calculations at DFTB3 geometries give results very close (∼1-2 kcal/mol) to the reference B3LYP values, highlighting the consistency between DFTB3 and B3LYP structures. Possible further developments of the DFTB3 model for a better treatment of transition-metal ions are also discussed. In the current form, our first generation of DFTB3 copper model is expected to be particularly valuable as a method that drives sampling in systems that feature a dynamical copper binding site.
Collapse
Affiliation(s)
- Michael Gaus
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Haiyun Jin
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Darren Demapan
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Anders S Christensen
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Puja Goyal
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Marcus Elstner
- Institute of Physical Chemistry, Karlsruhe Institute of Technology , Kaiserstr. 12, 76131 Karlsruhe, Germany
| | - Qiang Cui
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| |
Collapse
|
163
|
Chu TT, Li QQ, Qiu T, Sun ZY, Hu ZW, Chen YX, Zhao YF, Li YM. Clearance of the intracellular high level of the tau protein directed by an artificial synthetic hydrolase. MOLECULAR BIOSYSTEMS 2015; 10:3081-5. [PMID: 25308803 DOI: 10.1039/c4mb00508b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Promoting clearance of intracellular excessive tau is a potential therapeutic strategy for treating Alzheimer's disease. In this work, we designed and synthesized a cyclen-hybrid artificial 'hydrolase' I1-Cu(II) to cleave tau in vitro. Furthermore, a cell-permeable 'hydrolase' I2-Cu(II), derived from I1-Cu(II), was also synthesized to cleave intracellular tau proteins.
Collapse
Affiliation(s)
- Ting-Ting Chu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | | | | | | | | | | | | | | |
Collapse
|
164
|
Abstract
Our understanding of the molecular structures of amyloid fibrils that are associated with neurodegenerative diseases, of mechanisms by which disease-associated peptides and proteins aggregate into fibrils, and of structural properties of aggregation intermediates has advanced considerably in recent years. Detailed molecular structural models for certain fibrils and aggregation intermediates are now available. It is now well established that amyloid fibrils are generally polymorphic at the molecular level, with a given peptide or protein being capable of forming a variety of distinct, self-propagating fibril structures. Recent results from structural studies and from studies involving cell cultures, transgenic animals, and human tissue provide initial evidence that molecular structural variations in amyloid fibrils and related aggregates may correlate with or even produce variations in disease development. This article reviews our current knowledge of the structural and mechanistic aspects of amyloid formation, as well as current evidence for the biological relevance of structural variations.
Collapse
Affiliation(s)
- Robert Tycko
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0520, USA.
| |
Collapse
|
165
|
Structure-based development of nitroxoline derivatives as potential multifunctional anti-Alzheimer agents. Bioorg Med Chem 2015; 23:4442-4452. [PMID: 26116179 DOI: 10.1016/j.bmc.2015.06.010] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 05/29/2015] [Accepted: 06/05/2015] [Indexed: 12/30/2022]
Abstract
Tremendous efforts have been dedicated to the development of effective therapeutics against Alzheimer's disease, which represents the most common debilitating neurodegenerative disease. Multifunctional agents are molecules designed to have simultaneous effects on different pathological processes. Such compounds represent an emerging strategy for the development of effective treatments against Alzheimer's disease. Here, we report on the synthesis and biological evaluation of a series of nitroxoline-based analogs that were designed by merging the scaffold of 8-hydroxyquinoline with that of a known selective butyrylcholinesterase inhibitor that has promising anti-Alzheimer properties. Most strikingly, compound 8g inhibits self-induced aggregation of the amyloid beta peptide (Aβ1-42), inhibits with sub-micromolar potency butyrylcholinesterase (IC50=215 nM), and also selectively complexes Cu(2+). Our study thus designates this compound as a promising multifunctional agent for therapeutic treatment of Alzheimer's disease. The crystal structure of human butyrylcholinesterase in complex with compound 8g is also solved, which suggests ways to further optimize compounds featuring the 8-hydroxyquinoline scaffold.
Collapse
|
166
|
Abstract
It is becoming increasingly clear that neurological diseases are multi-factorial involving disruptions in multiple cellular systems. Thus, while each disease has its own initiating mechanisms and pathologies, certain common pathways appear to be involved in most, if not all, neurological diseases. Thus, it is unlikely that modulating only a single factor will be effective at either preventing disease development or slowing disease progression. A better approach is to identify small (< 900 daltons) molecules that have multiple biological activities relevant to the maintenance of brain function. We have identified an orally active, novel neuroprotective and cognition-enhancing molecule, the flavonoid fisetin. Fisetin not only has direct antioxidant activity but it can also increase the intracellular levels of glutathione, the major intracellular antioxidant. Fisetin can also activate key neurotrophic factor signaling pathways. In addition, it has anti-inflammatory activity and inhibits the activity of lipoxygenases, thereby reducing the production of pro-inflammatory eicosanoids and their by-products. This wide range of actions suggests that fisetin has the ability to reduce the impact of age-related neurological diseases on brain function.
Collapse
Affiliation(s)
- Pamela Maher
- The Salk Institute for Biological Studies, 10010 N. Torrey Pines Rd, La Jolla, CA 92037,
| |
Collapse
|
167
|
|
168
|
Álvarez-Diduk R, Galano A. Adrenaline and noradrenaline: protectors against oxidative stress or molecular targets? J Phys Chem B 2015; 119:3479-91. [PMID: 25646569 DOI: 10.1021/acs.jpcb.5b00052] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Density functional theory was used to investigate the potential role of neurotransmitters adrenaline and noradrenaline regarding oxidative stress. It is predicted that they can be efficient as free radical scavengers both in lipid and aqueous media, with the main reaction mechanism being the hydrogen transfer and the sequential proton loss electron transfer, respectively. Despite the polarity of the environment, adrenaline and noradrenaline react with (•)OOH faster than Trolox, which suggests that they are better peroxyl radical scavengers than the reference compound. Both catecholamines are also proposed to be capable of efficiently inhibiting the oxidative stress induced by copper(II)-ascorbate mixtures, and the (•)OH production via Haber-Weiss reaction, albeit the effects on the later are only partial. They exert such beneficial effects by sequestering Cu(II) ions. In summary, these catecholamines can be capable of reducing oxidative stress, by scavenging free radicals and by sequestering metal ions. However, at the same time they might lose their functions in the process due to the associated structural modifications. Consequently, adrenaline and noradrenaline can be considered as both protectors and molecular targets of oxidative stress. Fortunately, under the proper conditions, both catecholamines can be regenerated to their original form so their functions are restored.
Collapse
Affiliation(s)
- Ruslán Álvarez-Diduk
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa , San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, C. P. 09340. México D.F., México
| | | |
Collapse
|
169
|
Song Z, Han S, Pan X, Gong Y, Wang M. Pterostilbene mediates neuroprotection against oxidative toxicity via oestrogen receptor α signalling pathways. J Pharm Pharmacol 2015; 67:720-30. [DOI: 10.1111/jphp.12360] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 11/02/2014] [Indexed: 01/09/2023]
Abstract
Abstract
Objectives
Accumulating evidence indicated protective role of phytoestrogens against neuronal damage induced by various insults, such as amyloid beta, oxygen deprivation and mitochondrial toxins. Hydrogen peroxide (H2O2) influences the mitochondrial membrane potential, which eventually results in cell apoptosis. In this study, we investigated the effects and possible mechanisms of a phytoestrogen, pterostilbene (PTER), in cell apoptosis induced by H2O2 in human neuronal SH-SY5Y cells. We also analysed the involvement of oestrogen receptors, oestrogen receptor-α and -β (ER-α and ER-β) in the protective role of PTER.
Methods
The effects of PTER on H2O2-stimulated cell were examined using MTT and FACS analysis. The signal pathways and estrogen receptors involved in PTER's effects were investigated using MTT and Western blot analysis.
Key findings
The results showed that H2O2 treatment significantly reduced cell viability in SY5Y cells, which was protected by PTER treatment. We also found that H2O2 inhibited the PI3K/AKT and MAPK/ERK signalling pathways, whereas PTER treatment restored these signalling pathways. We also found that the PTER effect could be largely blocked by an ER-α antagonist, 3-Bis(4-hydroxyphenyl)-4-methyl-5-[4-(2-piperidinylethoxy)phenol]-1H-pyrazole dihydrochloride (MPP), but not by an ER-β antagonist, 4-[2-Phenyl-5,7-bis(trifluoromethyl)pyrazolo[1,5-a] pyrimidin-3-yl]phenol (PHTPP), suggesting that ER-α is a major player in the neuroprotective activity of PTER.
Conclusion
Our study thus demonstrates that PTER is an effective neuroprotective agent presumably through ER-α-mediated signalling pathways.
Collapse
Affiliation(s)
- Zhen Song
- Department of Genetics, Key Laboratory for Experimental Teratology of the Ministry of Education, Shandong University, Jinan, Shandong, China
| | - Shuai Han
- Department of Genetics, Key Laboratory for Experimental Teratology of the Ministry of Education, Shandong University, Jinan, Shandong, China
| | - Xiaohua Pan
- Department of Breast and Thyroid Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China
| | - Yaoqin Gong
- Department of Genetics, Key Laboratory for Experimental Teratology of the Ministry of Education, Shandong University, Jinan, Shandong, China
| | - Molin Wang
- Department of Genetics, Key Laboratory for Experimental Teratology of the Ministry of Education, Shandong University, Jinan, Shandong, China
| |
Collapse
|
170
|
Maher P, Kontoghiorghes GJ. Characterization of the Neuroprotective Potential of Derivatives of the Iron Chelating Drug Deferiprone. Neurochem Res 2015; 40:609-20. [DOI: 10.1007/s11064-014-1508-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 12/22/2014] [Accepted: 12/26/2014] [Indexed: 12/28/2022]
|
171
|
Tabbì G, Magrì A, Giuffrida A, Lanza V, Pappalardo G, Naletova I, Nicoletti VG, Attanasio F, Rizzarelli E. Semax, an ACTH4-10 peptide analog with high affinity for copper(II) ion and protective ability against metal induced cell toxicity. J Inorg Biochem 2015; 142:39-46. [DOI: 10.1016/j.jinorgbio.2014.09.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 09/05/2014] [Accepted: 09/11/2014] [Indexed: 10/24/2022]
|
172
|
Hou P, Liu G, Zhao Y, Shi Z, Zheng Q, Bu G, Xu H, Zhang YW. Role of copper and the copper-related protein CUTA in mediating APP processing and Aβ generation. Neurobiol Aging 2014; 36:1310-5. [PMID: 25557959 DOI: 10.1016/j.neurobiolaging.2014.12.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Revised: 11/11/2014] [Accepted: 12/04/2014] [Indexed: 11/16/2022]
Abstract
One major pathologic hallmark and trigger of Alzheimer's disease (AD) is overproduction and accumulation of β-amyloid (Aβ) species in the brain. Aβ is derived from β-amyloid precursor protein (APP) through sequential cleavages by β- and γ-secretases. Abnormal copper homeostasis also contributes to AD pathogenesis. Recently, we find that a copper-related protein, CutA divalent cation tolerance homolog of Escherichia coli (CUTA), interacts with the β-secretase β-site APP cleaving enzyme 1 (BACE1) and inhibits APP β-processing and Aβ generation. Herein, we further found that overexpression of CUTA increases intracellular copper level, whereas copper treatments promote CUTA expression. We also confirmed that copper treatments promote APP expression and Aβ secretion. In addition, copper treatments promoted the increase of Aβ secretion induced by CUTA downregulation but had no effect on CUTA-β-site APP cleaving enzyme 1 interaction. On the other hand, CUTA overexpression ameliorated copper-induced Aβ secretion but had no effect on APP expression. Moreover, we found that Aβ treatments can reduce both CUTA and copper levels in mouse primary neurons. Consistently, both CUTA and copper levels were decreased in the hippocampus of APP/PS1 AD mouse brain. Together, our results reveal a reciprocal modulation of copper and CUTA and suggest that both regulate Aβ generation through different mechanisms, although Aβ mutually affects copper and CUTA levels.
Collapse
Affiliation(s)
- Ping Hou
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, China; School of Pharmaceutical Sciences, Xiamen University, Xiamen, China
| | - Guiying Liu
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, China
| | - Yingjun Zhao
- Degenerative Disease Research Program, Sanford-Burnham Medical Research Institute, La Jolla, CA, USA
| | - Zhun Shi
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, China
| | - Qiuyang Zheng
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, China
| | - Guojun Bu
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, China
| | - Huaxi Xu
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, China; Degenerative Disease Research Program, Sanford-Burnham Medical Research Institute, La Jolla, CA, USA
| | - Yun-wu Zhang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, China.
| |
Collapse
|
173
|
Benseny-Cases N, Klementieva O, Cotte M, Ferrer I, Cladera J. Microspectroscopy (μFTIR) reveals co-localization of lipid oxidation and amyloid plaques in human Alzheimer disease brains. Anal Chem 2014; 86:12047-54. [PMID: 25415602 DOI: 10.1021/ac502667b] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Amyloid peptides are the main component of one of the characteristic pathological hallmarks of Alzheimer's disease (AD): senile plaques. According to the amyloid cascade hypothesis, amyloid peptides may play a central role in the sequence of events that leads to neurodegeneration. However, there are other factors, such as oxidative stress, that may be crucial for the development of the disease. In the present paper, we show that it is possible, by using Fourier tranform infrared (FTIR) microscopy, to co-localize amyloid deposits and lipid peroxidation in tissue slides from patients affected by Alzheimer's disease. Plaques and lipids can be analyzed in the same sample, making use of the characteristic infrared bands for peptide aggregation and lipid oxidation. The results show that, in samples from patients diagnosed with AD, the plaques and their immediate surroundings are always characterized by the presence of oxidized lipids. As for samples from non-AD individuals, those without amyloid plaques show a lower level of lipid oxidation than AD individuals. However, it is known that plaques can be detected in the brains of some non-AD individuals. Our results show that, in such cases, the lipid in the plaques and their surroundings display oxidation levels that are similar to those of tissues with no plaques. These results point to lipid oxidation as a possible key factor in the path that goes from showing the typical neurophatological hallmarks to suffering from dementia. In this process, the oxidative power of the amyloid peptide, possibly in the form of nonfibrillar aggregates, could play a central role.
Collapse
Affiliation(s)
- Núria Benseny-Cases
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France
| | | | | | | | | |
Collapse
|
174
|
Alkoxy bridged binuclear rhenium (I) complexes as a potential sensor for β-amyloid aggregation. Talanta 2014; 130:274-9. [DOI: 10.1016/j.talanta.2014.06.070] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 06/27/2014] [Accepted: 06/28/2014] [Indexed: 01/05/2023]
|
175
|
DeToma AS, Krishnamoorthy J, Nam Y, Lee HJ, Brender JR, Kochi A, Lee D, Onnis V, Congiu C, Manfredini S, Vertuani S, Balboni G, Ramamoorthy A, Lim MH. Synthetic Flavonoids, Aminoisoflavones: Interaction and Reactivity with Metal-Free and Metal-Associated Amyloid-β Species. Chem Sci 2014; 5:4851-4862. [PMID: 25383163 PMCID: PMC4217218 DOI: 10.1039/c4sc01531b] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Metal ion homeostasis in conjunction with amyloid-β (Aβ) aggregation in the brain has been implicated in Alzheimer's disease (AD) pathogenesis. To uncover the interplay between metal ions and Aβ peptides, synthetic, multifunctional small molecules have been employed to modulate Aβ aggregation in vitro. Naturally occurring flavonoids have emerged as a valuable class of compounds for this purpose due to their ability to modulate both metal-free and metal-induced Aβ aggregation. Although, flavonoids have shown anti-amyloidogenic effects, the structural moieties of flavonoids responsible for such reactivity have not been fully identified. In order to understand the structure-interaction-reactivity relationship within the flavonoid family for metal-free and metal-associated Aβ, we designed, synthesized, and characterized a set of isoflavone derivatives, aminoisoflavones (1-4), that displayed reactivity (i.e., modulation of Aβ aggregation) in vitro. NMR studies revealed a potential binding site for aminoisoflavones between the N-terminal loop and central helix on prefibrillar Aβ different from the non-specific binding observed for other flavonoids. The absence or presence of the catechol group differentiated the binding affinities and enthalpy/entropy balance between aminoisoflavones and Aβ. Furthermore, having a catechol group influenced the binding mode with fibrillar Aβ. Inclusion of additional substituents moderately tuned the impact of aminoisoflavones on Aβ aggregation. Overall, through these studies, we obtained valuable insights on the requirements for parity among metal chelation, intermolecular interactions, and substituent variation for Aβ interaction.
Collapse
Affiliation(s)
- Alaina S. DeToma
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, USA
| | - Janarthanan Krishnamoorthy
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, USA
- Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, USA
| | - Younwoo Nam
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109-2216, USA
- Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul, Korea
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea
| | - Hyuck Jin Lee
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, USA
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea
| | - Jeffrey R. Brender
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, USA
- Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, USA
| | - Akiko Kochi
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, USA
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea
| | - Dongkuk Lee
- Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul, Korea
| | - Valentina Onnis
- Department of Life Sciences and Biotechnology, University of Ferrara, I-44121 Ferrara, Italy
| | - Cenzo Congiu
- Department of Life Sciences and Biotechnology, University of Ferrara, I-44121 Ferrara, Italy
| | - Stefano Manfredini
- Department of Life and Environment Sciences, Pharmaceutical, Pharmacological and Nutraceutical Sciences Unit, University of Cagliari, I-09124 Cagliari, Italy
| | - Silvia Vertuani
- Department of Life and Environment Sciences, Pharmaceutical, Pharmacological and Nutraceutical Sciences Unit, University of Cagliari, I-09124 Cagliari, Italy
| | - Gianfranco Balboni
- Department of Life Sciences and Biotechnology, University of Ferrara, I-44121 Ferrara, Italy
| | - Ayyalusamy Ramamoorthy
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, USA
- Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, USA
| | - Mi Hee Lim
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109-2216, USA
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea
| |
Collapse
|
176
|
Tziouris PA, Tsiafoulis CG, Vlasiou M, Miras HN, Sigalas MP, Keramidas AD, Kabanos TA. Interaction of chromium(III) with a N,N'-disubstituted hydroxylamine-(diamido) ligand: a combined experimental and theoretical study. Inorg Chem 2014; 53:11404-14. [PMID: 25329981 DOI: 10.1021/ic501778d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reaction of hydroxylamine hydrochloride with prop-2-enamide in dichloromethane in the presence of triethylamine resulted in the isolation of the N,N'-disubstituted hydroxylamine-(diamido) ligand, 3,3'-(hydroxyazanediyl)dipropanamide (Hhydia). The ligand Hhydia was characterized by multinuclear NMR, high-resolution electrospray ionization mass spectrometry (ESI-MS), and X-ray structure analysis. Interaction of Hhydia with trans-[Cr(III)Cl2(H2O)4]Cl·2H2O in ethanol yields the ionization isomers [Cr(III)(Hhydia)2]Cl3·2H2O(1·2H2O) and cis/trans-[Cr(III)Cl2(Hhydia)2]Cl·2H2O (2·2H2O). The X-ray structure analysis of 1 revealed that the chromium atom in [Cr(III)(Hhydia)2](3+) is bonded to two neutral tridentate O,N,O-Hhydia ligands. The twist angle, θ, in [Cr(III)(Hhydia)2](3+) is 54.5(6)(0), that is, very close to an ideal octahedron. The intramolecular hydrogen bonds developed between the N-OH group of the first ligand and the amidic oxygen atom of the second ligand and vice versa contribute to the overall stability of the cation [Cr(III)(Hhydia)2](3+). The reaction rate constant of the formation of Cr(III) complexes 1·2H2O and 2·2H2O was found to be 8.7(±0.8) × 10(-5) M(-1) s(-1) at 25 °C in methyl alcohol and follows a first-order law kinetics based on the biologically relevant ligand Hhydia. The reaction rate constant is considerably faster in comparison with the corresponding water exchange rate constant for the hydrated chromium(III). The modification of the kinetics is of fundamental importance for the chromium(III) chemistry in biological systems. Ultraviolet-visible and electron paramagnetic resonance studies, both in solution and in the solid state, ESI-MS, and conductivity measurements support the fact that, irrespective of the solvent used in the interaction of Hhydia with trans-[Cr(III)Cl2(H2O)4]Cl·2H2O, the ionization isomers[Cr(III)(Hhydia)2]Cl3·2H2O (1·2H2O) and cis/trans-[Cr(III)Cl2(Hhydia)2]Cl·2H2O (2·2H2O) are produced.The reaction medium affects only the relevant percentage of the isomers in the solid state. The thermodynamic stability of the ionization isomers 1·2H2O and cis/trans-2·2H2O, their molecular structures as well as the vibrational spectra and the energetics of the Cr(III)- Hhydia/hydia(-) were studied by means of density functional theory calculations and found to be in excellent agreement with our experimental observations.
Collapse
Affiliation(s)
- Petros A Tziouris
- Section of Inorganic and Analytical Chemistry, Department of Chemistry and #NMR Center, University of Ioannina , Ioannina 45110, Greece
| | | | | | | | | | | | | |
Collapse
|
177
|
Manea M, Schlosser G, Murariu M. Time- and pH-Dependent Copper Binding to Aβ(1–16) Peptide: An Electrospray Ionization-Mass Spectrometric Approach. Int J Pept Res Ther 2014. [DOI: 10.1007/s10989-014-9437-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
178
|
Pal A, Prasad R. An overview of various mammalian models to study chronic copper intoxication associated Alzheimer’s disease like pathology. Biometals 2014; 28:1-9. [DOI: 10.1007/s10534-014-9799-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Accepted: 10/06/2014] [Indexed: 12/20/2022]
|
179
|
Gale EM, Mukherjee S, Liu C, Loving GS, Caravan P. Structure-redox-relaxivity relationships for redox responsive manganese-based magnetic resonance imaging probes. Inorg Chem 2014; 53:10748-61. [PMID: 25226090 PMCID: PMC4186673 DOI: 10.1021/ic502005u] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Indexed: 12/11/2022]
Abstract
A library of 10 Mn-containing complexes capable of switching reversibly between the Mn(II) and Mn(III) oxidation states was prepared and evaluated for potential usage as MRI reporters of tissue redox activity. We synthesized N-(2-hydroxybenzyl)-N,N',N'-ethylenediaminetriacetic acid (HBET) and N-(2-hydroxybenzyl-N,N',N'-trans-1,2-cyclohexylenediaminetriacetic acid (CyHBET) ligands functionalized (-H, -OMe, -NO2) at the 5-position of the aromatic ring. The Mn(II) complexes of all ligands and the Mn(III) complexes of the 5-H and 5-NO2 functionalized ligands were synthesized and isolated, but the Mn(III) complexes with the 5-OMe functionalized ligands were unstable. (1)H relaxivity of the 10 isolable complexes was measured at pH 7.4 and 37 °C, 1.4 T. Thermodynamic stability, pH-dependent complex speciation, hydration state, water exchange kinetics of the Mn(II) complexes, and pseudo-first order reduction kinetics of the Mn(III) complexes were studied using a combination of pH-potentiometry, UV-vis spectroscopy, and (1)H and (17)O NMR measurements. The effects of ligand structural and electronic modifications on the Mn(II/III) redox couple were studied by cyclic voltammetry. The Mn(II) complexes are potent relaxation agents as compared to the corresponding Mn(III) species with [Mn(II)(CyHBET)(H2O)](2-) exhibiting a 7.5-fold higher relaxivity (3.3 mM(-1) s(-1)) than the oxidized form (0.4 mM(-1) s(-1)). At pH 7.4, Mn(II) exists as a mixture of fully deprotonated (ML) and monoprotonated (HML) complexes and Mn(II) complex stability decreases as the ligands become more electron-releasing (pMn for 10 μM [Mn(II)(CyHBET-R')(H2O)](2-) decreases from 7.6 to 6.2 as R' goes from -NO2 to -OMe, respectively). HML speciation increases as the electron-releasing nature of the phenolato-O donor increases. The presence of a water coligand is maintained upon conversion from HML to ML, but the water exchange rate of ML is faster by up to 2 orders of magnitude (k(ex)(310) for H[Mn(II)(CyHBET)(H2O)](-) and [Mn(II)(CyHBET)(H2O)](2-) are 1.2 × 10(8) and 1.0 × 10(10) s(-1), respectively). The Mn(II/III) redox potential can be tuned over a range of 0.30 V (E(1/2) = 0.27-0.57 V) through electronic modifications to the 5-substituent of the aromatic ligand component. However, care must be taken in tuning the ligand electronics to avoid Mn(III)-ligand autoredox. Taken together, these results serve to establish criteria for optimizing Mn(III) versus Mn(II) relaxivity differentials, complex stability, and Mn(II/III) redox potential.
Collapse
Affiliation(s)
| | | | - Cynthia Liu
- The Athinoula
A. Martinos Center for Biomedical Imaging, Department of Radiology,
Massachusetts General Hospital, Harvard
Medical School, 149 Thirteenth
Street, Suite 2301, Charlestown, Massachusetts 02129, United States
| | - Galen S. Loving
- The Athinoula
A. Martinos Center for Biomedical Imaging, Department of Radiology,
Massachusetts General Hospital, Harvard
Medical School, 149 Thirteenth
Street, Suite 2301, Charlestown, Massachusetts 02129, United States
| | - Peter Caravan
- The Athinoula
A. Martinos Center for Biomedical Imaging, Department of Radiology,
Massachusetts General Hospital, Harvard
Medical School, 149 Thirteenth
Street, Suite 2301, Charlestown, Massachusetts 02129, United States
| |
Collapse
|
180
|
Jazvinšćak Jembrek M, Vlainić J, Radovanović V, Erhardt J, Oršolić N. Effects of copper overload in P19 neurons: impairment of glutathione redox homeostasis and crosstalk between caspase and calpain protease systems in ROS-induced apoptosis. Biometals 2014; 27:1303-22. [PMID: 25216733 DOI: 10.1007/s10534-014-9792-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 09/05/2014] [Indexed: 12/22/2022]
Abstract
Copper, a transition metal with essential biological functions, exerts neurotoxic effects when present in excess. The aim of the present study was to better elucidate cellular and molecular mechanisms of CuSO4 toxicity in differentiated P19 neurons. Exposure to 0.5 mM CuSO4 for 24 h provoked moderate decrease in viability, accompanied with barely increased generation of reactive oxygen species (ROS) and caspase-3/7 activity. Glutathione (GSH) and ATP contents were depleted, lactate dehydrogenase inactivated, and glyceraldehyde-3-phosphate dehydrogenase overexpressed. In severely damaged neurons exposed to only two times higher concentration, classical caspase-dependent apoptosis was triggered as evidenced by marked caspase-3/7 activation and chromatin condensation. Multifold increase in ROS, together with very pronounced ATP and GSH loss, strongly suggests impairment of redox homeostasis. At higher copper concentration protease calpains were also activated, and neuronal injury was prevented in the presence of calpain inhibitor leupeptin through the mechanism that affects caspase activation. MK-801 and nifedipine, inhibitors of calcium entry, and H-89 and UO126, inhibitors of PKA and ERK signaling respectively, exacerbated neuronal death only in severely damaged neurons, while ROS-scavenger quercetin and calcium chelator BAPTA attenuated toxicity only at lower concentration. In a dose-dependent manner copper also provoked transcriptional changes of genes involved in intracellular signaling and induction of apoptosis (p53, c-fos, Bcl-2 and Bax). The obtained results emphasize differences in triggered neuronal-death processes in a very narrow range of concentrations and give further insight into the molecular mechanisms of copper toxicity with the potential to improve current therapeutic approaches in curing copper-related neurodegenerative diseases.
Collapse
Affiliation(s)
- Maja Jazvinšćak Jembrek
- Laboratory for Molecular Neuropharmacology, Division of Molecular Medicine, Rudjer Boskovic Institute, Bijenicka 54, HR-10 000, Zagreb, Croatia,
| | | | | | | | | |
Collapse
|
181
|
Říha M, Karlíčková J, Filipský T, Macáková K, Rocha L, Bovicelli P, Silvestri IP, Saso L, Jahodář L, Hrdina R, Mladěnka P. In vitro evaluation of copper-chelating properties of flavonoids. RSC Adv 2014. [DOI: 10.1039/c4ra04575k] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
|
182
|
Singh NK, Banerjee BD, Bala K, Basu M, Chhillar N. Polymorphism in Cytochrome P450 2D6, Glutathione S-Transferases Pi 1 Genes, and Organochlorine Pesticides in Alzheimer Disease: A Case-Control Study in North Indian Population. J Geriatr Psychiatry Neurol 2014; 27:119-27. [PMID: 24584466 DOI: 10.1177/0891988714522698] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Accepted: 11/06/2013] [Indexed: 11/16/2022]
Abstract
OBJECTIVES It has been assumed that the association between Alzheimer disease (AD) and pesticides may be stronger among genetically susceptible individuals. The aim of the study was to examine the genetic polymorphism in cytochrome P450 2D6 (CYP2D6) and glutathione S-transferases pi 1 (GSTP1) with respect to organochlorine pesticides (OCPs) and metals in AD. METHODS This study included 100 patients with AD and 100 age-matched controls. The genetic polymorphisms were analyzed by restriction fragment length polymorphism. The OCPs and serum metal levels were determined using gas chromatography and an autoanalyzer, respectively. RESULTS We found a statistically significant association between AD and high levels of β-hexachlorocyclohexane (β-HCH; odds ratio [OR] = 2.064, 95% confidence intervals [95% CIs] = 1.373-3.102, dieldrin [OR = 2.086, 95% CI = 1.224-3.555], and copper [OR = 1.038, 95% CI = 1.012-1.064). The significant low level of magnesium (OR = 0.151, 95% CI = 0.047-0.489) even appears to have a protective role against AD. The GSTP1*B (P = .009) and GSTP1*C (P = .011) allelic variants were associated with increase in AD risk. CONCLUSION This study demonstrates that the GSTP1*B and *C allelic variants may be considered a candidate gene for AD. It can be suggested that although CYP2D6*4 polymorphism is not a risk of AD, the CYP2D6*4 and GSTP1 polymorphism may interact with β-HCH, dieldrin, and copper to influence the risk of AD.
Collapse
Affiliation(s)
- Neeraj Kumar Singh
- Department of Neurochemistry, Institute of Human Behaviour and Allied Sciences, Dilshad Garden, Delhi, India
| | - B D Banerjee
- Department of Biochemistry, Environmental Biochemistry Laboratory, University College of Medical Science & G.T.B. Hospital (University of Delhi), Dilshad Garden, Delhi, India
| | - Kiran Bala
- Department of Neurology, Institute of Human Behaviour and Allied Sciences, Dilshad Garden, Delhi, India
| | - Mitra Basu
- Health Centre, Institute of Nuclear Medicine and Allied Sciences, DRDO, Delhi, India
| | - Neelam Chhillar
- Department of Neurochemistry, Institute of Human Behaviour and Allied Sciences, Dilshad Garden, Delhi, India
| |
Collapse
|
183
|
Chen S, Zhang L, Long Y, Zhou F. Electroanalytical Sensors and Methods for Assays and Studies of Neurological Biomarkers. ELECTROANAL 2014. [DOI: 10.1002/elan.201400040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
184
|
Scheiber IF, Mercer JF, Dringen R. Metabolism and functions of copper in brain. Prog Neurobiol 2014; 116:33-57. [DOI: 10.1016/j.pneurobio.2014.01.002] [Citation(s) in RCA: 213] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 01/08/2014] [Accepted: 01/08/2014] [Indexed: 12/15/2022]
|
185
|
Abstract
Copper (Cu) is an essential microelement found in all living organisms with the unique ability to adopt two different redox states-in the oxidized (Cu(2+)) and reduced (Cu(+)). It is required for survival and serves as an important catalytic cofactor in redox chemistry for proteins that carry out fundamental biological functions, important in growth and development. The deficit of copper can result in impaired energy production, abnormal glucose and cholesterol metabolism, increased oxidative damage, increased tissue iron (Fe) accrual, altered structure and function of circulating blood and immune cells, abnormal neuropeptides synthesis and processing, aberrant cardiac electrophysiology, impaired myocardial contractility, and persistent effects on the neurobehavioral and the immune system. Increased copper level has been found in several disorders like e.g.: Wilson's disease or Menke's disease. New findings with the great potential for impact in medicine include the use of copper-lowering therapy for antiangiogenesis, antifibrotic and anti-inflammatory purposes. The role of copper in formation of amyloid plaques in Alzheimer's disease, and successful treatment of this disorder in rodent model by copper chelating are also of interest. In this work we will try to describe essential aspects of copper in chosen diseases. We will represent the evidence available on adverse effect derived from copper deficiency and copper excess. We will try to review also the copper biomarkers (chosen enzymes) that help reflect the level of copper in the body.
Collapse
|
186
|
Wainaina MN, Chen Z, Zhong C. Environmental factors in the development and progression of late-onset Alzheimer's disease. Neurosci Bull 2014; 30:253-70. [PMID: 24664867 PMCID: PMC5562669 DOI: 10.1007/s12264-013-1425-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 01/23/2014] [Indexed: 01/08/2023] Open
Abstract
Late-onset Alzheimer's disease (LOAD) is an age-related neurodegenerative disorder characterized by gradual loss of synapses and neurons, but its pathogenesis remains to be clarified. Neurons live in an environment constituted by neurons themselves and glial cells. In this review, we propose that the neuronal degeneration in the AD brain is partially caused by diverse environmental factors. We first discuss various environmental stresses and the corresponding responses at different levels. Then we propose some mechanisms underlying the specific pathological changes, in particular, hypothalamic-pituitary adrenal axis dysfunction at the systemic level; cerebrovascular dysfunction, metal toxicity, glial activation, and Aβ toxicity at the intercellular level; and kinase-phosphatase imbalance and epigenetic modification at the intracellular level. Finally, we discuss the possibility of developing new strategies for the prevention and treatment of LOAD from the perspective of environmental stress. We conclude that environmental factors play a significant role in the development of LOAD through multiple pathological mechanisms.
Collapse
Affiliation(s)
- Moses N. Wainaina
- Department of Neurology, Zhongshan Hospital; State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, 200032 China
- Pwani University, Kilifi, Kenya
| | - Zhichun Chen
- Department of Neurology, Zhongshan Hospital; State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, 200032 China
| | - Chunjiu Zhong
- Department of Neurology, Zhongshan Hospital; State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, 200032 China
- Institutes of Brain Science, Fudan University, Shanghai, 200032 China
| |
Collapse
|
187
|
Oxidative stress in Alzheimer's disease. Neurosci Bull 2014; 30:271-81. [PMID: 24664866 DOI: 10.1007/s12264-013-1423-y] [Citation(s) in RCA: 478] [Impact Index Per Article: 47.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Accepted: 01/03/2014] [Indexed: 10/25/2022] Open
Abstract
Oxidative stress plays a significant role in the pathogenesis of Alzheimer's disease (AD), a devastating disease of the elderly. The brain is more vulnerable than other organs to oxidative stress, and most of the components of neurons (lipids, proteins, and nucleic acids) can be oxidized in AD due to mitochondrial dysfunction, increased metal levels, inflammation, and β-amyloid (Aβ) peptides. Oxidative stress participates in the development of AD by promoting Aβ deposition, tau hyperphosphorylation, and the subsequent loss of synapses and neurons. The relationship between oxidative stress and AD suggests that oxidative stress is an essential part of the pathological process, and antioxidants may be useful for AD treatment.
Collapse
|
188
|
Malandrinos G, Hadjiliadis N. Cu(II)–histones interaction related to toxicity-carcinogenesis. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2013.12.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
189
|
Dey A, Lakshmanan J. The role of antioxidants and other agents in alleviating hyperglycemia mediated oxidative stress and injury in liver. Food Funct 2014; 4:1148-84. [PMID: 23760593 DOI: 10.1039/c3fo30317a] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Several antioxidants and agents having similar antioxidant effects are known to exert beneficial effects in ameliorating the injurious effects of hyperglycemia on liver in different diabetic in vitro and in vivo models. The review deals with some of the agents which have been shown to exert protective effects on liver against hyperglycemic insult and the various mechanisms involved. The different classes of agents which protect the diabetic liver or decrease the severity of hyperglycemia mediated injury include flavonoids, catechins, and other polyphenolic compounds, curcumin and its derivatives, certain vitamins, hormones and drugs, trace elements, prototypical antioxidants and amino acids. Some of the pronounced changes mediated by the antioxidants in liver exposed to hyperglycemia include decreased oxidative stress, and alterations in carbohydrate and lipid metabolism. Other mechanisms through which the agents ameliorate hyperglycemia mediated liver injury include decrease in oxidative DNA and protein damage, restoration of mitochondrial structural and functional integrity, decrease in inflammation and improved insulin signaling. Thus, antioxidants may prove to be an important mode of defense in maintaining normal hepatic functions in diabetes.
Collapse
Affiliation(s)
- Aparajita Dey
- Life Science Division, AU-KBC Research Centre, MIT Campus of Anna University, Chromepet, Chennai 600044, India.
| | | |
Collapse
|
190
|
Lee EC, Ha E, Singh S, Legesse L, Ahmad S, Karnaukhova E, Donaldson RP, Jeremic AM. Copper(II)-human amylin complex protects pancreatic cells from amylin toxicity. Phys Chem Chem Phys 2014; 15:12558-71. [PMID: 23793354 DOI: 10.1039/c3cp44542a] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Human amylin-derived oligomers and aggregates are believed to play an important role in the pathogenesis of type II diabetes mellitus (T2DM). In addition to amylin-evoked cell attrition, T2DM is often accompanied by elevated serum copper levels. Although previous studies have shown that human amylin, in the course of its aggregation, produces hydrogen peroxide (H2O2) in solution, and that this process is exacerbated in the presence of copper(ii) ions (Cu(2+)), very little is known about the mechanism of interaction between Cu(2+) and amylin in pancreatic β-cells, including its pathological significance. Hence, in this study we investigated the mechanism by which Cu(2+) and human amylin catalyze formation of reactive oxygen species (ROS) in cells and in vitro, and examined the modulatory effect of Cu(2+) on amylin aggregation and toxicity in pancreatic rat insulinoma (RIN-m5F) β-cells. Our results indicate that Cu(2+) interacts with human and rat amylin to form metalo-peptide complexes with low aggregative and oxidative properties. Human and non-amyloidogenic rat amylin produced minute (nM) amounts of H2O2, the accumulation of which was slightly enhanced in the presence of Cu(2+). In a marked contrast to human and rat amylin, and in the presence of the reducing agents glutathione and ascorbate, Cu(2+) produced μM concentrations of H2O2 surpassing the amylin effect by several fold. The current study shows that human and rat amylin not only produce but also quench H2O2, and that human but not rat amylin significantly decreases the amount of H2O2 in solution produced by Cu(2+) and glutathione. Similarly, human amylin was found to also decrease hydroxyl radical formation elicited by Cu(2+) and glutathione. Furthermore, Cu(2+) mitigated the toxic effect of human amylin by inhibiting activation of pro-apoptotic caspase-3 and stress-kinase signaling pathways in rat pancreatic insulinoma cells in part by stabilizing human amylin in its native conformational state. This sacrificial quenching of metal-catalyzed ROS by human amylin and copper's anti-aggregative and anti-apoptotic properties suggest a novel and protective role for the copper-amylin complex.
Collapse
Affiliation(s)
- Elizabeth C Lee
- Department of Biological Sciences, The George Washington University, Washington, DC 20052, USA
| | | | | | | | | | | | | | | |
Collapse
|
191
|
Repiščák P, Erhardt S, Rena G, Paterson MJ. Biomolecular mode of action of metformin in relation to its copper binding properties. Biochemistry 2014; 53:787-95. [PMID: 24433134 DOI: 10.1021/bi401444n] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Metformin (Metf), the most commonly used type 2 diabetes drug, is known to affect the cellular housekeeping of copper. Recently, we discovered that the structurally closely related propanediimidamide (PDI) shows a cellular behavior different from that of Metf. Here we investigate the binding of these compounds to copper, to compare their binding strength. Furthermore, we take a closer look at the electronic properties of these compounds and their copper complexes such as molecular orbital interactions and electrostatic potential surfaces. Our results clearly show that the copper binding energies cannot alone be the cause of the biochemical differentiation between Metf and PDI. We conclude that other factors such as pKa values and hydrophilicity of the compounds play a crucial role in their cellular activity. Metf in contrast to PDI can occur as an anion in aqueous medium at moderate pH, forming much stronger complexes particularly with Cu(II) ions, suggesting that biguanides but not PDI may induce easy oxidation of Cu(I) ions extracted from proteins. The higher hydrophobicity and the lack of planarity of PDI may further differentiate it from biguanides in terms of their molecular recognition characteristics. These different properties could hold the key to metformin's mitochondrial activity because they suggest that the drug could act at least in part as a pro-oxidant of accessible protein-bound Cu(I) ions.
Collapse
Affiliation(s)
- Peter Repiščák
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University , Edinburgh, United Kingdom EH14 4AS
| | | | | | | |
Collapse
|
192
|
Effect of metals on kinetic pathways of amyloid-β aggregation. Biomolecules 2014; 4:101-16. [PMID: 24970207 PMCID: PMC4030978 DOI: 10.3390/biom4010101] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 01/04/2014] [Accepted: 01/07/2014] [Indexed: 12/22/2022] Open
Abstract
Metal ions, including copper and zinc, have been implicated in the pathogenesis of Alzheimer’s disease through a variety of mechanisms including increased amyloid-β affinity and redox effects. Recent reports have demonstrated that the amyloid-β monomer does not necessarily travel through a definitive intermediary en-route to a stable amyloid fibril structure. Rather, amyloid-β misfolding may follow a variety of pathways resulting in a fibrillar end-product or a variety of oligomeric end-products with a diversity of structures and sizes. The presence of metal ions has been demonstrated to alter the kinetic pathway of the amyloid-β peptide which may lead to more toxic oligomeric end-products. In this work, we review the contemporary literature supporting the hypothesis that metal ions alter the reaction pathway of amyloid-β misfolding leading to more neurotoxic species.
Collapse
|
193
|
|
194
|
Leong SL, Young TR, Barnham KJ, Wedd AG, Hinds MG, Xiao Z, Cappai R. Quantification of copper binding to amyloid precursor protein domain 2 and its Caenorhabditis elegans ortholog. Implications for biological function. Metallomics 2014; 6:105-16. [DOI: 10.1039/c3mt00258f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
195
|
Young TR, Kirchner A, Wedd AG, Xiao Z. An integrated study of the affinities of the Aβ16 peptide for Cu(i) and Cu(ii): implications for the catalytic production of reactive oxygen species. Metallomics 2014; 6:505-17. [DOI: 10.1039/c4mt00001c] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Affinities of Aβ16 peptide and several selected variants for Cu(i) and Cu(ii) were determined with new probes and correlated to their binding modes and abilities in promoting ROS generation.
Collapse
Affiliation(s)
- Tessa R. Young
- The Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- Victoria 3010, Australia
- School of Chemistry
- The University of Melbourne
| | - Angie Kirchner
- The Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- Victoria 3010, Australia
- School of Chemistry
- The University of Melbourne
| | - Anthony G. Wedd
- The Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- Victoria 3010, Australia
- School of Chemistry
- The University of Melbourne
| | - Zhiguang Xiao
- The Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- Victoria 3010, Australia
- School of Chemistry
- The University of Melbourne
| |
Collapse
|
196
|
Angelé-Martínez C, Goodman C, Brumaghim J. Metal-mediated DNA damage and cell death: mechanisms, detection methods, and cellular consequences. Metallomics 2014; 6:1358-81. [DOI: 10.1039/c4mt00057a] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Metal ions cause various types of DNA damage by multiple mechanisms, and this damage is a primary cause of cell death and disease.
Collapse
Affiliation(s)
| | - Craig Goodman
- Department of Chemistry
- Clemson University
- Clemson, USA
| | | |
Collapse
|
197
|
Frizzell N, Baynes JW. Chelation therapy for the management of diabetic complications: a hypothesis and a proposal for clinical laboratory assessment of metal ion homeostasis in plasma. Clin Chem Lab Med 2014; 52:69-75. [PMID: 23612664 DOI: 10.1515/cclm-2012-0881] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Accepted: 03/07/2013] [Indexed: 01/25/2023]
Abstract
In a recent article, we presented the hypothesis that decompartmentalized metal ions are a major contributor to the development of diabetic complications and supported the use of chelation therapy for the treatment of diabetic complications [Nagai R, Murray DB, Metz TO, Baynes JW. Chelation: a fundamental mechanism of action of AGE inhibitors, AGE breakers, and other inhibitors of diabetes complications. Diabetes 2012;61:549-59]. Evidence in support of this hypothesis included the observation that many drugs used in the treatment of diabetes are chelators, that advanced glycation end product (AGE) inhibitors and AGE breakers lack carbonyl-trapping or AGE-breaker activity but are potent chelators, and that simple copper chelators inhibit vascular pathology in diabetes and aging. In the present article, we extend this hypothesis, proposing the interplay between copper and iron in the development of pathology in diabetes and other chronic age-related diseases, including atherosclerosis and neurodegenerative diseases. We also discuss the need and provide a framework for the development of a clinical laboratory test to assess plasma autoxidative catalytic activity and transition metal homeostasis in vivo.
Collapse
|
198
|
Barbariga M, Curnis F, Spitaleri A, Andolfo A, Zucchelli C, Lazzaro M, Magnani G, Musco G, Corti A, Alessio M. Oxidation-induced structural changes of ceruloplasmin foster NGR motif deamidation that promotes integrin binding and signaling. J Biol Chem 2013; 289:3736-48. [PMID: 24366863 DOI: 10.1074/jbc.m113.520981] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Asparagine deamidation occurs spontaneously in proteins during aging; deamidation of Asn-Gly-Arg (NGR) sites can lead to the formation of isoAsp-Gly-Arg (isoDGR), a motif that can recognize the RGD-binding site of integrins. Ceruloplasmin (Cp), a ferroxidase present in the cerebrospinal fluid (CSF), contains two NGR sites in its sequence: one exposed on the protein surface ((568)NGR) and the other buried in the tertiary structure ((962)NGR). Considering that Cp can undergo oxidative modifications in the CSF of neurodegenerative diseases, we investigated the effect of oxidation on the deamidation of both NGR motifs and, consequently, on the acquisition of integrin binding properties. We observed that the exposed (568)NGR site can deamidate under conditions mimicking accelerated Asn aging. In contrast, the hidden (962)NGR site can deamidate exclusively when aging occurs under oxidative conditions, suggesting that oxidation-induced structural changes foster deamidation at this site. NGR deamidation in Cp was associated with gain of integrin-binding function, intracellular signaling, and cell pro-adhesive activity. Finally, Cp aging in the CSF from Alzheimer disease patients, but not in control CSF, causes Cp deamidation with gain of integrin-binding function, suggesting that this transition might also occur in pathological conditions. In conclusion, both Cp NGR sites can deamidate during aging under oxidative conditions, likely as a consequence of oxidative-induced structural changes, thereby promoting a gain of function in integrin binding, signaling, and cell adhesion.
Collapse
|
199
|
Taniguchi A, Sasaki D, Shiohara A, Iwatsubo T, Tomita T, Sohma Y, Kanai M. Attenuation of the Aggregation and Neurotoxicity of Amyloid-β Peptides by Catalytic Photooxygenation. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201308001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
200
|
Taniguchi A, Sasaki D, Shiohara A, Iwatsubo T, Tomita T, Sohma Y, Kanai M. Attenuation of the aggregation and neurotoxicity of amyloid-β peptides by catalytic photooxygenation. Angew Chem Int Ed Engl 2013; 53:1382-5. [PMID: 24339209 DOI: 10.1002/anie.201308001] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 10/30/2013] [Indexed: 11/06/2022]
Abstract
Alzheimer's disease (AD), a progressive severe neurodegenerative disorder, is currently incurable, despite intensive efforts worldwide. Herein, we demonstrate that catalytic oxygenation of amyloid-β peptides (Aβ) might be an effective approach to treat AD. Aβ1-42 was oxygenated under physiologically-relevant conditions (pH 7.4, 37 °C) using a riboflavin catalyst and visible light irradiation, with modifications at the Tyr(10) , His(13) , His(14) , and Met(35) residues. The oxygenated Aβ1-42 exhibited considerably lower aggregation potency and neurotoxicity compared with native Aβ. Photooxygenation of Aβ can be performed even in the presence of cells, by using a selective flavin catalyst attached to an Aβ-binding peptide; the Aβ cytotoxicity was attenuated in this case as well. Furthermore, oxygenated Aβ1-42 inhibited the aggregation and cytotoxicity of native Aβ.
Collapse
Affiliation(s)
- Atsuhiko Taniguchi
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan); Japan Science and Technology Agency (JST), ERATO, Kanai Life Science Catalysis Project, Bunkyo-ku, Tokyo 113-0033 (Japan)
| | | | | | | | | | | | | |
Collapse
|