201
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Wang CY, Xie JW, Xu Y, Wang T, Cai JH, Wang X, Zhao BL, An L, Wang ZY. Trientine reduces BACE1 activity and mitigates amyloidosis via the AGE/RAGE/NF-κB pathway in a transgenic mouse model of Alzheimer's disease. Antioxid Redox Signal 2013; 19:2024-39. [PMID: 23541064 PMCID: PMC3869419 DOI: 10.1089/ars.2012.5158] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
AIMS There is mounting evidence that the transition metal copper may play an important role in the pathophysiology of Alzheimer's disease (AD). Triethylene tetramine dihydrochloride (trientine), a CuII-selective chelator, is a commonly used treatment for Wilson's disease to decrease accumulated copper, and thereby decreases oxidative stress. In the present study, we evaluated the effects of a 3-month treatment course of trientine (Trien) on amyloidosis in 7-month-old β-amyloid (Aβ) precursor protein and presenilin-1 (APP/PS1) double transgenic (Tg) AD model mice. RESULTS We observed that Trien reduced the level of advanced glycation end products (AGEs), and decreased Aβ deposition and synapse loss in brain of APP/PS1 mice. Importantly, we found that Trien blocked the receptor for AGEs (RAGE), downregulated β-site APP cleaving enzyme 1 (BACE1), inhibited amyloidogenic APP cleavage, and subsequently reduced Aβ levels. In vitro, in SH-SY5Y cells overexpressing Swedish mutant APP, Trien-mediated downregulation of BACE1 occurred via inhibition of the NF-κB signaling pathway. INNOVATION In this study, we demonstrated for the first time that Trien inhibited amyloidogenic pathway including targeting the downregulation of RAGE and NF-κB. CONCLUSION Trien might mitigate amyloidosis in AD by inhibiting the RAGE/NF-κB/BACE1 pathway. Our study demonstrates that Trien may be a viable therapeutic strategy for the intervention and treatment of AD and other AD-like pathologies.
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Affiliation(s)
- Chun-Yan Wang
- 1 Key Laboratory of Medical Cell Biology of Ministry of Education of China, Department of Pathophysiology, China Medical University , Shenyang, People's Republic of China
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202
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Ortiz FC, Vergara C, Alcayaga J. Micromolar copper modifies electrical properties and spontaneous discharges of nodose ganglion neurons in vitro. Biometals 2013; 27:45-52. [PMID: 24213945 DOI: 10.1007/s10534-013-9685-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Accepted: 11/04/2013] [Indexed: 11/25/2022]
Abstract
Copper plays a key role in aerobic cell physiology mainly related to mitochondrial metabolism. This element is also present at higher than basal levels in some central nuclei and indeed, current evidence support copper's role as a neuromodulator in the central nervous system. More recent data indicate that copper may also affect peripheral neuronal activity, but so far, there are not detailed descriptions of what peripheral neuronal characteristics are targeted by copper. Here, we studied the effect of physiological concentration of CuCl2 (μM range) on the activity of peripheral neurons using a preparation of nodose ganglion in vitro. By mean of conventional intracellular recordings passive and active electrical membrane properties were studied. Extracellular copper modified (in a redox-independent manner) the resting membrane potential and the input resistance of the nodose ganglion neurons, increasing the excitability in most of the tested neurons. These results suggest that Cu(2+) modulates the activity of nodose ganglion neurons and support nodose ganglion in vitro preparation as a simple model to study the subcellular mechanisms involved in the Cu(2+) effects on neuron electrical properties.
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Affiliation(s)
- Fernando C Ortiz
- Laboratorio de Fisiología Celular, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile,
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203
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Rosini M, Simoni E, Milelli A, Minarini A, Melchiorre C. Oxidative Stress in Alzheimer’s Disease: Are We Connecting the Dots? J Med Chem 2013; 57:2821-31. [DOI: 10.1021/jm400970m] [Citation(s) in RCA: 152] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Michela Rosini
- Department
of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| | - Elena Simoni
- Department
of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| | - Andrea Milelli
- Department
for Life Quality Studies, Alma Mater Studiorum—University of Bologna, Corso d’Augusto
237, 47921 Rimini, Italy
| | - Anna Minarini
- Department
of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| | - Carlo Melchiorre
- Department
of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
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204
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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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205
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Nanotechnology-Based Drug Delivery Systems for Targeting, Imaging and Diagnosis of Neurodegenerative Diseases. Pharm Res 2013; 30:2499-511. [DOI: 10.1007/s11095-013-1156-7] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Accepted: 07/22/2013] [Indexed: 12/26/2022]
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206
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Lee YC, Huh YS, Farooq W, Chung J, Han JI, Shin HJ, Jeong SH, Lee JS, Oh YK, Park JY. Lipid extractions from docosahexaenoic acid (DHA)-rich and oleaginous Chlorella sp. biomasses by organic-nanoclays. BIORESOURCE TECHNOLOGY 2013; 137:74-81. [PMID: 23587811 DOI: 10.1016/j.biortech.2013.03.090] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Revised: 03/11/2013] [Accepted: 03/13/2013] [Indexed: 06/02/2023]
Abstract
Microalgae biorefinement has attracted in intensive academic and industrial interest worldwide for its potential to replace petrol biofuels as economically and environmentally advantageous alternatives. However, harvesting and lipid extraction remain as critical and difficult issues to be resolved. In the present study, four amino-groups functionalized organic-nano clays were prepared. Specifically, Mg or Al or Ca backboned and covalently linked with 3-aminopropyltriethoxysilane or 3-[2-(2-aminoethylamino)ethylamino]propyltrimethoxysilane by sol-gel reaction under ambient conditions, resulted in Mg-APTES clay, Al-APTES clay, Ca-APTES clay, and Mg-N3 clay, respectively. Each organic-nanoclay was utilized for lipid extraction from wet microalgae biomass. As a result, the lipid-extraction efficiency of paste docosahexaenoic acid (DHA)-rich Chlorella sp. with low lipid content was high, while one of paste oleaginous Chlorella sp. with high lipid content was relatively low. Despite the low lipid-extraction efficiencies in all of the wet microalgae biomass, the conversion of the extracted lipids' fatty acids to biodiesel was nearly 100%.
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Affiliation(s)
- Young-Chul Lee
- Department of Biological Engineering, College of Engineering, Inha University, Incheon 402-751, Republic of Korea
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207
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Savelieff MG, Lee S, Liu Y, Lim MH. Untangling amyloid-β, tau, and metals in Alzheimer's disease. ACS Chem Biol 2013; 8:856-65. [PMID: 23506614 DOI: 10.1021/cb400080f] [Citation(s) in RCA: 287] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Protein misfolding and metal ion dyshomeostasis are believed to underlie numerous neurodegenerative diseases, including Alzheimer's disease (AD). The pathological hallmark of AD is accumulation of misfolded amyloid-β (Aβ) peptides and hyperphosphorylated tau (ptau) proteins in the brain. Since AD etiology remains unclear, several hypotheses have emerged to elucidate its pathological pathways. The amyloid cascade hypothesis, a leading hypothesis for AD development, advocates Aβ as the principal culprit. Additionally, evidence suggests that tau may contribute to AD pathology. Aβ and tau have also been shown to impact each other's pathology either directly or indirectly. Furthermore, metal ion dyshomeostasis is associated with these misfolded proteins. Metal interactions with Aβ and tau/ptau also influence their aggregation properties and neurotoxicity. Herein, we present current understanding on the roles of Aβ, tau, and metal ions, placing equal emphasis on each of these proposed features, as well as their inter-relationships in AD pathogenesis.
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Affiliation(s)
- Masha G. Savelieff
- Life
Sciences Institute and ‡Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109,
United States
| | - Sanghyun Lee
- Life
Sciences Institute and ‡Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109,
United States
| | - Yuzhong Liu
- Life
Sciences Institute and ‡Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109,
United States
| | - Mi Hee Lim
- Life
Sciences Institute and ‡Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109,
United States
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208
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Noda Y, Asada M, Kubota M, Maesako M, Watanabe K, Uemura M, Kihara T, Shimohama S, Takahashi R, Kinoshita A, Uemura K. Copper enhances APP dimerization and promotes Aβ production. Neurosci Lett 2013; 547:10-5. [PMID: 23669644 DOI: 10.1016/j.neulet.2013.04.057] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 04/22/2013] [Accepted: 04/27/2013] [Indexed: 12/26/2022]
Abstract
Alzheimer's disease (AD) is characterized by the deposition of amyloid-β (Aβ) plaques, senile plaque. The Aβ peptide is cleaved from amyloid precursor protein (APP) by β-secretase and γ-secretase. Until now, many literatures have documented that the high concentration of copper is present in Aβ plaques and enhances aggregation of. The APP copper binding domain (CuBD) is located in the N-terminal next to the growth factor-like domain that gets involved in APP homodimerization. Importantly, dimerization of APP has profound effect on Aβ production. We investigated whether copper alters the state of APP dimerization and how it affects APP metabolism. Here, we demonstrate that copper enhanced APP dimerization and increased extracellular release of Aβ. Moreover, copper chelator, D-penicillamine, suppressed APP dimerization and decreased extracellular release of Aβ. These results suggest that the action of copper may be profoundly associated with the pathway of Aβ production in AD pathogenesis.
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Affiliation(s)
- Yasuha Noda
- Department of Health Science, Kyoto University Graduate School of Medicine, 53 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
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209
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Bai S, Chen Q, Lu C, Lin JM. Automated high performance liquid chromatography with on-line reduction of disulfides and chemiluminescence detection for determination of thiols and disulfides in biological fluids. Anal Chim Acta 2013; 768:96-101. [DOI: 10.1016/j.aca.2013.01.035] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2012] [Revised: 01/15/2013] [Accepted: 01/18/2013] [Indexed: 12/16/2022]
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210
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Insights into antiamyloidogenic properties of the green tea extract (-)-epigallocatechin-3-gallate toward metal-associated amyloid-β species. Proc Natl Acad Sci U S A 2013; 110:3743-8. [PMID: 23426629 DOI: 10.1073/pnas.1220326110] [Citation(s) in RCA: 186] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Despite the significance of Alzheimer's disease, the link between metal-associated amyloid-β (metal-Aβ) and disease etiology remains unclear. To elucidate this relationship, chemical tools capable of specifically targeting and modulating metal-Aβ species are necessary, along with a fundamental understanding of their mechanism at the molecular level. Herein, we investigated and compared the interactions and reactivities of the green tea extract, (-)-epigallocatechin-3-gallate [(2R,3R)-5,7-dihydroxy-2-(3,4,5-trihydroxyphenyl)-3,4-dihydro-2H-1-benzopyran-3-yl 3,4,5-trihydroxybenzoate; EGCG], with metal [Cu(II) and Zn(II)]-Aβ and metal-free Aβ species. We found that EGCG interacted with metal-Aβ species and formed small, unstructured Aβ aggregates more noticeably than in metal-free conditions in vitro. In addition, upon incubation with EGCG, the toxicity presented by metal-free Aβ and metal-Aβ was mitigated in living cells. To understand this reactivity at the molecular level, structural insights were obtained by ion mobility-mass spectrometry (IM-MS), 2D NMR spectroscopy, and computational methods. These studies indicated that (i) EGCG was bound to Aβ monomers and dimers, generating more compact peptide conformations than those from EGCG-untreated Aβ species; and (ii) ternary EGCG-metal-Aβ complexes were produced. Thus, we demonstrate the distinct antiamyloidogenic reactivity of EGCG toward metal-Aβ species with a structure-based mechanism.
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211
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Tiiman A, Palumaa P, Tõugu V. The missing link in the amyloid cascade of Alzheimer's disease - metal ions. Neurochem Int 2013; 62:367-78. [PMID: 23395747 DOI: 10.1016/j.neuint.2013.01.023] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Revised: 01/14/2013] [Accepted: 01/23/2013] [Indexed: 01/23/2023]
Abstract
Progressive deposition of amyloid beta (Aβ) peptides into amyloid plaques is the pathological hallmark of Alzheimer's disease (AD). The amyloid cascade hypothesis pins this deposition as the primary cause of the disease, but the mechanisms that causes this deposition remain elusive. An increasing amount of evidence shows that biometals Zn(II) and Cu(II) can interact with Aβ, thus influencing the fibrillization and toxicity. This review focuses on the role of Zn(II) and Cu(II) in AD, and revisits the amyloid cascade hypothesis demonstrating the possible roles of Zn(II) and Cu(II) in the disease pathogenesis.
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Affiliation(s)
- Ann Tiiman
- Department of Gene Technology, Tallinn University of Technology, Akadeemia tee 15, Tallinn 12618, Estonia.
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212
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Sun MH, Li W, Liu JH, Wen GB, Tan X, Lin YW. Structural and nitrite reductase activity comparisons of myoglobins with one to three distal histidines. RSC Adv 2013. [DOI: 10.1039/c3ra40839f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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213
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Jellinger KA. The relevance of metals in the pathophysiology of neurodegeneration, pathological considerations. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2013; 110:1-47. [PMID: 24209432 DOI: 10.1016/b978-0-12-410502-7.00002-8] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Neurodegenerative disorders are featured by a variety of pathological conditions that share similar critical processes, such as oxidative stress, free radical activity, proteinaceous aggregations, mitochondrial dysfunctions, and energy failure. They are mediated or triggered by an imbalance of metal ions leading to changes of critical biological systems and initiating a cascade of events finally leading to neurodegeneration and cell death. Their causes are multifactorial, and although the source of the shift in oxidative homeostasis is still unclear, current evidence points to changes in the balance of redox transition metals, especially iron, copper, and other trace metals. They are present at elevated levels in Alzheimer disease, Parkinson disease, multisystem atrophy, etc., while in other neurodegenerative disorders, copper, zinc, aluminum, and manganese are involved. This chapter will review the recent advances of the role of metals in the pathogenesis and pathophysiology of major neurodegenerative diseases and discuss the use of chelating agents as potential therapies for metal-related disorders.
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214
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Cerchiaro G, Manieri TM, Bertuchi FR. Analytical methods for copper, zinc and iron quantification in mammalian cells. Metallomics 2013; 5:1336-45. [DOI: 10.1039/c3mt00136a] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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215
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Xiao Z, Gottschlich L, van der Meulen R, Udagedara SR, Wedd AG. Evaluation of quantitative probes for weaker Cu(i) binding sites completes a set of four capable of detecting Cu(i) affinities from nanomolar to attomolar. Metallomics 2013; 5:501-13. [DOI: 10.1039/c3mt00032j] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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216
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Shao X, Gu H, Wang Z, Chai X, Tian Y, Shi G. Highly Selective Electrochemical Strategy for Monitoring of Cerebral Cu2+ Based on a Carbon Dot-TPEA Hybridized Surface. Anal Chem 2012; 85:418-25. [DOI: 10.1021/ac303113n] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Xiangling Shao
- Department
of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, People’s Republic of
China, and
| | - Hui Gu
- Department
of Chemistry, East China Normal University, Dongchuan Road 500, Shanghai 200241, People’s Republic of
China
| | - Zhen Wang
- Department
of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, People’s Republic of
China, and
| | - Xiaolan Chai
- Department
of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, People’s Republic of
China, and
| | - Yang Tian
- Department
of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, People’s Republic of
China, and
| | - Guoyue Shi
- Department
of Chemistry, East China Normal University, Dongchuan Road 500, Shanghai 200241, People’s Republic of
China
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217
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Lindgren J, Segerfeldt P, Sholts SB, Gräslund A, Karlström AE, Wärmländer SKTS. Engineered non-fluorescent Affibody molecules facilitate studies of the amyloid-beta (Aβ) peptide in monomeric form: low pH was found to reduce Aβ/Cu(II) binding affinity. J Inorg Biochem 2012; 120:18-23. [PMID: 23262458 DOI: 10.1016/j.jinorgbio.2012.11.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 11/23/2012] [Accepted: 11/23/2012] [Indexed: 11/17/2022]
Abstract
Aggregation of amyloid-beta (Aβ) peptides into oligomers and amyloid plaques in the human brain is considered a causative factor in Alzheimer's disease (AD). As metal ions are over-represented in AD patient brains, and as distinct Aβ aggregation pathways in presence of Cu(II) have been demonstrated, metal binding to Aβ likely affects AD progression. Aβ aggregation is moreover pH-dependent, and AD appears to involve inflammatory conditions leading to physiological acidosis. Although metal binding specificity to Aβ varies at different pH's, metal binding affinity to Aβ has so far not been quantitatively investigated at sub-neutral pH levels. This may be explained by the difficulties involved in studying monomeric peptide properties under aggregation-promoting conditions. We have recently devised a modified Affibody molecule, Z(Aβ3)(12-58), that binds Aβ with sub-nanomolar affinity, thereby locking the peptide in monomeric form without affecting the N-terminal region where metal ions bind. Here, we introduce non-fluorescent Aβ-binding Affibody variants that keep Aβ monomeric while only slightly affecting the Aβ peptide's metal binding properties. Using fluorescence spectroscopy, we demonstrate that Cu(II)/Aβ(1-40) binding is almost two orders of magnitude weaker at pH 5.0 (apparent K(D)=51 μM) than at pH 7.3 (apparent K(D)=0.86 μM). This effect is arguably caused by protonation of the histidines involved in the metal ligandation. Our results indicate that engineered variants of Affibody molecules are useful for studying metal-binding and other properties of monomeric Aβ under various physiological conditions, which will improve our understanding of the molecular mechanisms involved in AD.
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Affiliation(s)
- Joel Lindgren
- Division of Molecular Biotechnology, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Centre, 106 91 Stockholm, Sweden
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