101
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Naturally occurring cinnamic acid derivatives prevent amyloid transformation of alpha-synuclein. Biochimie 2020; 170:128-139. [DOI: 10.1016/j.biochi.2020.01.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 01/09/2020] [Indexed: 12/26/2022]
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102
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Dehghani Z, Meratan AA, Saboury AA, Nemat-Gorgani M. α-Synuclein fibrillation products trigger the release of hexokinase I from mitochondria: Protection by curcumin, and possible role in pathogenesis of Parkinson's disease. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183251. [PMID: 32113849 DOI: 10.1016/j.bbamem.2020.183251] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 01/22/2020] [Accepted: 02/10/2020] [Indexed: 01/16/2023]
Abstract
Extensive research has shown that assembling of α-synuclein amyloid aggregates on mitochondria is an important mechanistic feature of Parkinson's disease (PD) and other Lewy body disorders. However, the molecular mechanism(s) of its neuronal toxicity remain unclear. Type 1 Hexokinase (HKI), a key enzyme in the control of brain glucose metabolism, plays an important role in protecting against mitochondrially-regulated apoptosis through reducing generation of reactive oxygen species (ROS). The release of mitochondrially-bound HKI causes a significant decrease in enzyme activity and triggers oxidative stress. Here, we have investigated the potency of amyloid fibrillation products arising from α-synuclein and hen egg white lysozyme (HEWL) for the release of HKI and ROS content enhancement in mitochondria isolated from rat brain. Results clearly indicate the capacity of the fibrillation products of α-synuclein, and not HEWL, to trigger release of HKI from the Type A binding site of mitochondria for the enzyme and to induce mitochondrial ROS enhancement in a dose-dependent manner. Moreover, we found that curcumin was very effective in preventing mitochondrial HKI release and ROS enhancement induced by α-synuclein fibrillation products. The pathophysiological significance of mitochondrial HKI activity and localization in pathogenesis of neurodegenerative disorders including PD are discussed. Taken together, these results may offer insight into a possible mechanism by which disease-related peptides and proteins may exert their neuronal toxicity.
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Affiliation(s)
- Ziba Dehghani
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran 14176-14335, Iran; Center of Excellence in Biothermodynamics, University of Tehran, Tehran, Iran
| | - Ali Akbar Meratan
- Department of Biological Sciences, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran.
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran 14176-14335, Iran; Center of Excellence in Biothermodynamics, University of Tehran, Tehran, Iran.
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103
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Kumar ST, Donzelli S, Chiki A, Syed MMK, Lashuel HA. A simple, versatile and robust centrifugation-based filtration protocol for the isolation and quantification of α-synuclein monomers, oligomers and fibrils: Towards improving experimental reproducibility in α-synuclein research. J Neurochem 2020; 153:103-119. [PMID: 31925956 PMCID: PMC7155127 DOI: 10.1111/jnc.14955] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 12/31/2019] [Accepted: 01/06/2020] [Indexed: 12/11/2022]
Abstract
Increasing evidence suggests that the process of alpha‐synuclein (α‐syn) aggregation from monomers into amyloid fibrils and Lewy bodies, via oligomeric intermediates plays an essential role in the pathogenesis of different synucleinopathies, including Parkinson's disease (PD), multiple system atrophy and dementia with Lewy bodies (DLB). However, the nature of the toxic species and the mechanisms by which they contribute to neurotoxicity and disease progression remain elusive. Over the past two decades, significant efforts and resources have been invested in studies aimed at identifying and targeting toxic species along the pathway of α‐syn fibrillization. Although this approach has helped to advance the field and provide insights into the biological properties and toxicity of different α‐syn species, many of the fundamental questions regarding the role of α‐syn aggregation in PD remain unanswered, and no therapeutic compounds targeting α‐syn aggregates have passed clinical trials. Several factors have contributed to this slow progress, including the complexity of the aggregation pathways and the heterogeneity and dynamic nature of α‐syn aggregates. In the majority of experiment, the α‐syn samples used contain mixtures of α‐syn species that exist in equilibrium and their ratio changes upon modifying experimental conditions. The failure to quantitatively account for the distribution of different α‐syn species in different studies has contributed not only to experimental irreproducibility but also to misinterpretation of results and misdirection of valuable resources. Towards addressing these challenges and improving experimental reproducibility in Parkinson's research, we describe here a simple centrifugation‐based filtration protocol for the isolation, quantification and assessment of the distribution of α‐syn monomers, oligomers and fibrils, in heterogeneous α‐syn samples of increasing complexity. The protocol is simple, does not require any special instrumentation and can be performed rapidly on multiple samples using small volumes. Here, we present and discuss several examples that illustrate the applications of this protocol and how it could contribute to improving the reproducibility of experiments aimed at elucidating the structural basis of α‐syn aggregation, seeding activity, toxicity and pathology spreading. This protocol is applicable, with slight modifications, to other amyloid‐forming proteins. ![]()
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Affiliation(s)
- Senthil T Kumar
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, EPFL, Lausanne, Switzerland
| | - Sonia Donzelli
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, EPFL, Lausanne, Switzerland
| | - Anass Chiki
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, EPFL, Lausanne, Switzerland
| | - Muhammed Muazzam Kamil Syed
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, EPFL, Lausanne, Switzerland
| | - Hilal A Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, EPFL, Lausanne, Switzerland
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104
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Pujols J, Peña-Díaz S, Pallarès I, Ventura S. Chemical Chaperones as Novel Drugs for Parkinson's Disease. Trends Mol Med 2020; 26:408-421. [PMID: 32277934 DOI: 10.1016/j.molmed.2020.01.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 11/19/2019] [Accepted: 01/21/2020] [Indexed: 12/14/2022]
Abstract
Parkinson's disease (PD) is characterized by progressive loss of dopaminergic neurons and the accumulation of deposits of α-synuclein (α-syn) in the brain. The pivotal role of α-syn aggregation in PD makes it an attractive target for potential disease-modifying therapies. However, the disordered nature of the protein, its multistep aggregation mechanism, and the lack of structural information on intermediate species complicate the discovery of modulators of α-syn amyloid deposition. Despite these difficulties, small molecules have been shown to block the misfolding and aggregation of α-syn, and can even disentangle mature α-syn amyloid fibrils. In this review we provide an updated overview of these leading small compounds and discuss how these chemical chaperones hold great promise to alter the course of PD progression.
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Affiliation(s)
- Jordi Pujols
- Institut de Biotecnologia i Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
| | - Samuel Peña-Díaz
- Institut de Biotecnologia i Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Irantzu Pallarès
- Institut de Biotecnologia i Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Salvador Ventura
- Institut de Biotecnologia i Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
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105
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Scutellarin inhibits the uninduced and metal-induced aggregation of α-Synuclein and disaggregates preformed fibrils: implications for Parkinson's disease. Biochem J 2020; 477:645-670. [DOI: 10.1042/bcj20190705] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/08/2020] [Accepted: 01/15/2020] [Indexed: 01/07/2023]
Abstract
The aggregation of the protein alpha synuclein (α-Syn), a known contributor in Parkinson's disease (PD) pathogenesis is triggered by transition metal ions through occupational exposure and disrupted metal ion homeostasis. Naturally occurring small molecules such as polyphenols have emerged as promising inhibitors of α-Syn fibrillation and toxicity and could be potential therapeutic agents against PD. Here, using an array of biophysical tools combined with cellular assays, we demonstrate that the novel polyphenolic compound scutellarin efficiently inhibits the uninduced and metal-induced fibrillation of α-Syn by acting at the nucleation stage and stabilizes a partially folded intermediate of α-Syn to form SDS-resistant, higher-order oligomers (∼680 kDa) and also disaggregates preformed fibrils of α-Syn into similar type of higher-order oligomers. ANS binding assay, fluorescence lifetime measurements and cell-toxicity experiments reveal scutellarin-generated oligomers as compact, low hydrophobicity structures with modulated surface properties and significantly reduced cytotoxicity than the fibrillation intermediates of α-Syn control. Fluorescence spectroscopy and isothermal titration calorimetry establish the binding between scutellarin and α-Syn to be non-covalent in nature and of moderate affinity (Ka ∼ 105 M−1). Molecular docking approaches suggest binding of scutellarin to the residues present in the NAC region and C-terminus of monomeric α-Syn and the C-terminal residues of fibrillar α-Syn, demonstrating inhibition of fibrillation upon binding to these residues and possible stabilization of the autoinhibitory conformation of α-Syn. These findings reveal interesting insights into the mechanism of scutellarin action and establish it as an efficient modulator of uninduced as well as metal-induced α-Syn fibrillation and toxicity.
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106
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Sekowski S, Buczkowski A, Palecz B, Abdulladjanova N. Inhibitory effect of Euphorbia tannins on α-synuclein aggregation in aqueous solutions. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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107
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Varaprasad K, López M, Núñez D, Jayaramudu T, Sadiku ER, Karthikeyan C, Oyarzúnc P. Antibiotic copper oxide-curcumin nanomaterials for antibacterial applications. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112353] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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108
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Neuroprotective effects of lignan 7-hydroxymatairesinol (HMR/lignan) in a rodent model of Parkinson's disease. Nutrition 2020; 69:110494. [DOI: 10.1016/j.nut.2019.04.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 03/24/2019] [Accepted: 04/01/2019] [Indexed: 01/01/2023]
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109
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Xiang DB, Zhang KQ, Zeng YL, Yan QZ, Shi Z, Tuo QH, Lin LM, Xia BH, Wu P, Liao DF. Curcumin: From a controversial "panacea" to effective antineoplastic products. Medicine (Baltimore) 2020; 99:e18467. [PMID: 31914018 PMCID: PMC6959860 DOI: 10.1097/md.0000000000018467] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Curcumin, a controversial "panacea," has been broadly studied. Its bioactivities including antioxidant, anti-inflammatory, and especially antineoplastic activities have been documented. However, due to its extensive bioactivities, some scientists hold a skeptical point of view toward curcumin and described curcumin as a "deceiver" to chemists. The objective of this study was to explore curcumin's another possibility as a potential supplementary leading compound to cancer treatments. METHODS Literature searches were conducted using electronic databases. Search terms such as "curcumin," "curcumin analogues," and so on were used. The literatures were collected and summarized. In this article, reported targets of curcumin are reviewed. The limitations of a curcumin as a therapeutic anticancer product including low bioavailability and poor targeting are mentioned. Furthermore, modified curcumin analogues and antitumor mechanisms are listed and discussed in the aspects of cell death and tumor microenvironment including angiogenesis, tissue hypoxia status, and energy metabolism. RESULTS Several possible modification strategies were presented by analyzing the relationships between the antitumor activity of curcumin analogues and their structural characteristics, including the introduction of hydrophilic group, shortening of redundant hydrocarbon chain, the introduction of extra chemical group, and so on. CONCLUSIONS From our perspective, after structural modification curcumin could be more effective complementary product for cancer therapies by the enhancement of targeting abilities and the improvement of bioavailability.
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Affiliation(s)
- De-Biao Xiang
- Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province
| | - Kai-Qiang Zhang
- Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province
| | - Ya-Ling Zeng
- Medical School, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Qing-Zi Yan
- Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province
| | - Zhe Shi
- Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province
| | - Qin-Hui Tuo
- Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province
| | - Li-Mei Lin
- Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province
| | - Bo-Hou Xia
- Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province
| | - Ping Wu
- Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province
| | - Duan-Fang Liao
- Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province
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110
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Design, synthesis and preliminary in-vitro studies of novel boronated monocarbonyl analogues of Curcumin (BMAC) for antitumor and β-amiloyd disaggregation activity. Bioorg Chem 2019; 93:103324. [DOI: 10.1016/j.bioorg.2019.103324] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/23/2019] [Accepted: 09/26/2019] [Indexed: 12/20/2022]
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111
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Katyal N, Deep S. A computational approach to get insights into multiple faces of additives in modulation of protein aggregation pathways. Phys Chem Chem Phys 2019; 21:24269-24285. [PMID: 31670327 DOI: 10.1039/c9cp03763b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An enormous population worldwide is presently confronted with debilitating neurodegenerative diseases. The etiology of the disease is connected to protein aggregation and the events involved therein. Thus, a complete understanding of an inhibitor at different stages in the process is imperative for the formulation of a drug molecule. This review presents a detailed summary of the current status of different cosolvents. It further develops how the complex aggregation pathway can be simplified into three steps common to all proteins and the way computer simulations can be exploited to gain insights into the ways by which known inhibitors can affect all these stages. Computation of theoretical parameters in this regard and their correlation with experimental techniques is accentuated. In addition to providing an outline of the scope of different additives, this review showcases the way by which the problem of analyzing an effect of an additive can be addressed effectively via MD simulations.
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Affiliation(s)
- Nidhi Katyal
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016, Delhi, India.
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112
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Mukhopadhyay A, Mehra S, Kumar R, Maji SK, Krishnamoorthy G, Sharma KP. α-Synuclein Spontaneously Adopts Stable and Reversible α-Helical Structure in Water-Less Environment. Chemphyschem 2019; 20:2783-2790. [PMID: 31515915 DOI: 10.1002/cphc.201900868] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 09/12/2019] [Indexed: 11/07/2022]
Abstract
A highly stable, spontaneous, and reversible α-helical-structure formation in recombinant and chemically modified α-synuclein protein is demonstrated for the first time in a water-less (1.5 % w/w H2 O) polymer surfactant environment. Using a combination of circular dichroism and ATR-FTIR spectroscopy, we show that whilst native α-synuclein in aqueous solution shows a predominant unordered conformation (≈64 %), mixing with polyethylene glycol based anionic polymer surfactant (PS) and removing water reveals a 25 % unordered, 25 % α-helical, and 27 % β-sheet structure. Interestingly, bioconjugation of native α-synuclein with a diamine molecule, to increase the positive charge on the protein chain, and subsequent electrostatic coupling with the PS forms a conjugate with a retained unordered structure. Removal of water from this system provides a highly stable α-helical (≈74 %) water-less liquid system. Surprisingly, the α-helical-to-unordered state transition is completely reversible and is achieved at ≈25-30 w/w% of water in the system. Moreover, the α-helix shows an extraordinary temporal stability (>6 months) in a waterless environment.
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Affiliation(s)
- Anasua Mukhopadhyay
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai-, 400076, INDIA
| | - Surabhi Mehra
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai-, 400076, INDIA
| | - Raj Kumar
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai-, 400076, INDIA
| | - Samir K Maji
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai-, 400076, INDIA
| | - G Krishnamoorthy
- Department of Biotechnology, Anna University, Chennai-, 600025, INDIA
| | - Kamendra P Sharma
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai-, 400076, INDIA
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113
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Paul A, Viswanathan GK, Mahapatra S, Balboni G, Pacifico S, Gazit E, Segal D. Antagonistic Activity of Naphthoquinone-Based Hybrids toward Amyloids Associated with Alzheimer's Disease and Type-2 Diabetes. ACS Chem Neurosci 2019; 10:3510-3520. [PMID: 31282646 DOI: 10.1021/acschemneuro.9b00123] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Protein misfolding and amyloid formation are associated with various human diseases including Alzheimer's disease (AD), Parkinson's disease (PD), and Type-2 Diabetes mellitus (T2DM). No disease-modifying therapeutics are available for them. Despite the lack of sequence homology between the corresponding proteins, aromatic residues are recognized as common key motifs in the formation and stabilization of amyloid structures via π-π stacking. Thus, targeting aromatic recognition interfaces could be a useful approach for inhibiting amyloid formation as well as disrupting the preformed amyloid fibrils. Combining experimental and computational approaches, we demonstrated the anti-amyloidogenic effect of naphthoquinone-tryptophan-based hybrid molecules toward PHF6 (τ-derived aggregative peptide), Amyloid β (Aβ42), and human islet amyloid polypeptide (hIAPP) implicated in AD and T2DM, respectively. These hybrid molecules significantly inhibited the aggregation and disrupted their preformed fibrillar aggregates in vitro, in a dose-dependent manner as evident from Thioflavin T/S binding assay, CD spectroscopy, and electron microscopy. Dye leakage assay from LUVs and cell-based experiments indicated that the hybrid molecules inhibit membrane disruption and cytotoxicity induced by these amyloids. Furthermore, in silico studies provided probable mechanistic insights into the interaction of these molecules with the amyloidogenic proteins in their monomeric or aggregated forms, including the role of hydrophobic interaction, hydrogen bond formation, and packing during inhibition of aggregation and fibril disassembly. Our findings may help in designing novel therapeutics toward AD, T2DM, and other proteinopathies based on the naphthoquinone derived hybrid molecules.
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Affiliation(s)
| | | | | | - Gianfranco Balboni
- Department of Life and Environmental Sciences - Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, via Ospedale 72, I-09124 Cagliari, Italy
| | - Salvatore Pacifico
- Department of Chemical and Pharmaceutical Sciences, University of Ferrara, via Fossato di Mortara 17-19, I-44121 Ferrara, Italy
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114
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Ham S, Kim H, Hwang S, Kang H, Yun SP, Kim S, Kim D, Kwon HS, Lee YS, Cho M, Shin HM, Choi H, Chung KY, Ko HS, Lee GH, Lee Y. Cell-Based Screen Using Amyloid Mimic β23 Expression Identifies Peucedanocoumarin III as a Novel Inhibitor of α-Synuclein and Huntingtin Aggregates. Mol Cells 2019; 42:480-494. [PMID: 31250621 PMCID: PMC6602149 DOI: 10.14348/molcells.2019.0091] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 05/22/2019] [Accepted: 05/28/2019] [Indexed: 01/02/2023] Open
Abstract
Aggregates of disease-causing proteins dysregulate cellular functions, thereby causing neuronal cell loss in diverse neurodegenerative diseases. Although many in vitro or in vivo studies of protein aggregate inhibitors have been performed, a therapeutic strategy to control aggregate toxicity has not been earnestly pursued, partly due to the limitations of available aggregate models. In this study, we established a tetracycline (Tet)-inducible nuclear aggregate (β23) expression model to screen potential lead compounds inhibiting β23-induced toxicity. Highthroughput screening identified several natural compounds as nuclear β23 inhibitors, including peucedanocoumarin III (PCIII). Interestingly, PCIII accelerates disaggregation and proteasomal clearance of both nuclear and cytosolic β23 aggregates and protects SH-SY5Y cells from toxicity induced by β23 expression. Of translational relevance, PCIII disassembled fibrils and enhanced clearance of cytosolic and nuclear protein aggregates in cellular models of huntingtin and α-synuclein aggregation. Moreover, cellular toxicity was diminished with PCIII treatment for polyglutamine (PolyQ)-huntingtin expression and α-synuclein expression in conjunction with 6-hydroxydopamine (6-OHDA) treatment. Importantly, PCIII not only inhibited α-synuclein aggregation but also disaggregated preformed α-synuclein fibrils in vitro . Taken together, our results suggest that a Tet-Off β23 cell model could serve as a robust platform for screening effective lead compounds inhibiting nuclear or cytosolic protein aggregates. Brain-permeable PCIII or its derivatives could be beneficial for eliminating established protein aggregates.
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Affiliation(s)
- Sangwoo Ham
- Division of Pharmacology, Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon 16419,
Korea
| | - Hyojung Kim
- Division of Pharmacology, Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon 16419,
Korea
| | - Seojin Hwang
- College of Pharmacy, Chosun University, Gwangju 61452,
Korea
| | - Hyunook Kang
- School of Biological Sciences, College of Natural Sciences, Seoul National University, Seoul 08826,
Korea
| | - Seung Pil Yun
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21205,
USA
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD 21205,
USA
- Diana Helis Henry Medical Research Foundation, New Orleans, LA 70130,
USA
| | - Sangjune Kim
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21205,
USA
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD 21205,
USA
- Diana Helis Henry Medical Research Foundation, New Orleans, LA 70130,
USA
| | - Donghoon Kim
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21205,
USA
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD 21205,
USA
- Diana Helis Henry Medical Research Foundation, New Orleans, LA 70130,
USA
| | - Hyun Sook Kwon
- National Development Institute of Korean Medicine, Gyeongsan 38540,
Korea
| | - Yun-Song Lee
- Division of Pharmacology, Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon 16419,
Korea
| | - MyoungLae Cho
- National Development Institute of Korean Medicine, Gyeongsan 38540,
Korea
| | - Heung-Mook Shin
- National Development Institute of Korean Medicine, Gyeongsan 38540,
Korea
| | - Heejung Choi
- School of Biological Sciences, College of Natural Sciences, Seoul National University, Seoul 08826,
Korea
| | - Ka Young Chung
- School of Pharmacy, Sungkyunkwan University, Suwon 16419,
Korea
| | - Han Seok Ko
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21205,
USA
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD 21205,
USA
- Diana Helis Henry Medical Research Foundation, New Orleans, LA 70130,
USA
| | - Gum Hwa Lee
- College of Pharmacy, Chosun University, Gwangju 61452,
Korea
| | - Yunjong Lee
- Division of Pharmacology, Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon 16419,
Korea
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Samsung Biomedical Research Institute, Seoul 06351,
Korea
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115
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The progresses in curcuminoids-based metal complexes: especially in cancer therapy. Future Med Chem 2019; 11:1035-1056. [PMID: 31140861 DOI: 10.4155/fmc-2018-0190] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Curcuminoids (CURs), a series of derivatives in turmeric (Curcuma longa), are commonly discovered to control the deterioration of cancers. However, the physiochemical properties and the original side effects of many CURs complexes put barriers in their medical applications. To address them, the investigation of metal-based complexes with CURs is in progress. The complexes were summarized according to articles in recent years. The results showed that the complexes improved the physicochemical properties or therapeutic performances compared with pure CURs. Further, it is possible for the novel complexes to be applied in chemical detecting, paramagnetic-luminescent and bio-imaging fields. Therefore, the formation of the metal-based CURs complexes (MBCCs) is beneficial for the development of CURs especially in medical fields.
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116
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Trotta T, Panaro MA, Prifti E, Porro C. Modulation of Biological Activities in Glioblastoma Mediated by Curcumin. Nutr Cancer 2019; 71:1241-1253. [PMID: 31007066 DOI: 10.1080/01635581.2019.1604978] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Curcumin is an alkaloid with various pharmacologic properties; numerous investigations have suggested that in the Central Nervous System, Curcumin has anti-inflammatory, antimicrobial, antioxidant, and antitumor effects. Gliomas are the most common primary intracranial tumors in adults. The prognosis of glioblastoma is still dismal. In this review, we profile that Curcumin could suppress cell proliferation and induce apoptosis of cancer cells and genomic modulation. In particular, Curcumin could exert its therapeutic effect via modulating miRNA, affecting a variety of miRNAs involved in the response to cancer therapy. The combination of Curcumin with chemotherapeutic drugs or radiotherapy could prime the sensitivity of cancer cells to chemotherapy or radiotherapy. We also discuss the use of exosomes as Curcumin delivery vehicles. In this context, exosomes containing Curcumin may change the behavior of recipient cells by targeting a sequence of cellular and molecular pathways. Hence, the application of exosomes containing Curcumin may prove to be an emerging area of research in cancer therapy.
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Affiliation(s)
- Teresa Trotta
- Department of Clinical and Experimental Medicine, University of Foggia , Foggia , Italy
| | - Maria A Panaro
- Department of Biosciences, Biotechnologies and Biopharmaceutics University of Bari , Bari , Italy
| | - Elona Prifti
- Department of Clinical Materies, University of Elbasan "Aleksander Xhuvani", Faculty of Medical and Technical Science , Albania
| | - Chiara Porro
- Department of Clinical and Experimental Medicine, University of Foggia , Foggia , Italy
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Jia L, Wang Y, Sang J, Cui W, Zhao W, Wei W, Chen B, Lu F, Liu F. Dihydromyricetin Inhibits α-Synuclein Aggregation, Disrupts Preformed Fibrils, and Protects Neuronal Cells in Culture against Amyloid-Induced Cytotoxicity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:3946-3955. [PMID: 30900456 DOI: 10.1021/acs.jafc.9b00922] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Fibrillogenesis of α-synuclein (αSN) is associated with the onset and progression of Parkinson's disease (PD). Dihydromyricetin (DHM), a natural flavonoid compound extracted from Ampelopsis grossedentata, has proven antioxidative, antineuroinflammatory, and neuroprotective effects in dementia. However, it remains unclear if DHM can impede αSN fibrillogenesis and attenuate the corresponding cytotoxicity. Herein, we found that DHM could inhibit αSN fibrillogenesis and destabilize mature αSN fibrils in a dose-dependent manner. Moreover, DHM protected against αSN-induced cytotoxicity by improving the cell viability by 34.73 ± 3.68% at a 1:1 molar ratio of αSN to DHM. Molecular dynamics simulations showed that DHM interacts with the αSN trimer mainly via nonpolar mechanisms. The key residues by which αSN interacts with DHM were hydrophobic, and their side chains and main chains showed a synergistic effect via hydrophobic and hydrogen-bonding interactions. These findings suggest that DHM possesses great potential to be developed into a new aggregation inhibitor for αSN.
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Affiliation(s)
- Longgang Jia
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology , Tianjin University of Science & Technology , Tianjin 300457 , People's Republic of China
| | - Ying Wang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology , Tianjin University of Science & Technology , Tianjin 300457 , People's Republic of China
| | - Jingcheng Sang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology , Tianjin University of Science & Technology , Tianjin 300457 , People's Republic of China
| | - Wei Cui
- Ningbo Key Laboratory of Behavioral Neuroscience, Zhejiang Provincial Key Laboratory of Pathophysiology, School of Medicine , Ningbo University , Ningbo 315211 , People's Republic of China
| | - Wenping Zhao
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology , Tianjin University of Science & Technology , Tianjin 300457 , People's Republic of China
| | - Wei Wei
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology , Tianjin University of Science & Technology , Tianjin 300457 , People's Republic of China
| | - Beibei Chen
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology , Tianjin University of Science & Technology , Tianjin 300457 , People's Republic of China
| | - Fuping Lu
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology , Tianjin University of Science & Technology , Tianjin 300457 , People's Republic of China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control , Tianjin 300457 , People's Republic of China
| | - Fufeng Liu
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology , Tianjin University of Science & Technology , Tianjin 300457 , People's Republic of China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control , Tianjin 300457 , People's Republic of China
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118
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Paul A, Zhang BD, Mohapatra S, Li G, Li YM, Gazit E, Segal D. Novel Mannitol-Based Small Molecules for Inhibiting Aggregation of α-Synuclein Amyloids in Parkinson's Disease. Front Mol Biosci 2019; 6:16. [PMID: 30968030 PMCID: PMC6438916 DOI: 10.3389/fmolb.2019.00016] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 03/01/2019] [Indexed: 11/16/2022] Open
Abstract
The aggregation of the amyloidogenic protein α-synuclein (α-Syn) into toxic oligomers and mature fibrils is the major pathological hallmark of Parkinson's disease (PD). Small molecules that inhibit α-Syn aggregation thus may be useful therapeutics for PD. Mannitol and naphthoquinone-tryptophan (NQTrp) have been shown in the past to inhibit α-Syn aggregation by different mechanisms. Herein, we tested whether the conjugation of Mannitol and NQTrp may result in enhance efficacy toward α-Syn. The molecules were conjugated either by a click linker or via a PEG linker. The effect of the conjugate molecules on α-Syn aggregation in vitro was monitored using Thioflavin T fluorescence assay, circular dichroism, transmission electron microscopy, and Congo red birefringence assay. One of the conjugate molecules was found to be more effective than the two parent molecules and as effective as a mixture of the two. The conjugate molecules attenuated the disruptive effect of α-Syn on artificial membrane of Large Unilamellar Vesicles as monitored by dye leakage assay. The conjugates were found to be have low cytotoxicity and reduced toxicity of α-Syn toward SH-SY5Y neuroblastoma cells. These novel designed entities can be attractive scaffold for the development of therapeutic agents for PD.
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Affiliation(s)
- Ashim Paul
- School of Molecular Microbiology and Biotechnology, Tel Aviv University, Tel Aviv, Israel
| | - Bo-Dou Zhang
- Department of Chemistry, Tsinghua University, Beijing, China
| | - Satabdee Mohapatra
- School of Molecular Microbiology and Biotechnology, Tel Aviv University, Tel Aviv, Israel
| | - Gao Li
- Department of Chemistry, Tsinghua University, Beijing, China
| | - Yan-Mei Li
- Department of Chemistry, Tsinghua University, Beijing, China.,Institute of Parkinson Disease, Beijing Institute for Brain Disorders, Beijing, China.,Center for Synthetic and Systems Biology, Tsinghua University, Beijing, China
| | - Ehud Gazit
- School of Molecular Microbiology and Biotechnology, Tel Aviv University, Tel Aviv, Israel
| | - Daniel Segal
- School of Molecular Microbiology and Biotechnology, Tel Aviv University, Tel Aviv, Israel.,Sagol Interdisciplinary School of Neurosciences, Tel Aviv University, Tel Aviv, Israel
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119
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Javed H, Nagoor Meeran MF, Azimullah S, Adem A, Sadek B, Ojha SK. Plant Extracts and Phytochemicals Targeting α-Synuclein Aggregation in Parkinson's Disease Models. Front Pharmacol 2019; 9:1555. [PMID: 30941047 PMCID: PMC6433754 DOI: 10.3389/fphar.2018.01555] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 12/20/2018] [Indexed: 12/21/2022] Open
Abstract
α-Synuclein (α-syn) is a presynaptic protein that regulates the release of neurotransmitters from synaptic vesicles in the brain. α-Syn aggregates, including Lewy bodies, are features of both sporadic and familial forms of Parkinson's disease (PD). These aggregates undergo several key stages of fibrillation, oligomerization, and aggregation. Therapeutic benefits of drugs decline with disease progression and offer only symptomatic treatment. Novel therapeutic strategies are required which can either prevent or delay the progression of the disease. The link between α-syn and the etiopathogenesis and progression of PD are well-established in the literature. Studies indicate that α-syn is an important therapeutic target and inhibition of α-syn aggregation, oligomerization, and fibrillation are an important disease modification strategy. However, recent studies have shown that plant extracts and phytochemicals have neuroprotective effects on α-syn oligomerization and fibrillation by targeting different key stages of its formation. Although many reviews on the antioxidant-mediated, neuroprotective effect of plant extracts and phytochemicals on PD symptoms have been well-highlighted, the antioxidant mechanisms show limited success for translation to clinical studies. The identification of specific plant extracts and phytochemicals that target α-syn aggregation will provide selective molecules to develop new drugs for PD. The present review provides an overview of plant extracts and phytochemicals that target α-syn in PD and summarizes the observed effects and the underlying mechanisms. Furthermore, we provide a synopsis of current experimental models and techniques used to evaluate plant extracts and phytochemicals. Plant extracts and phytochemicals were found to inhibit the aggregation or fibril formation of oligomers. These also appear to direct α-syn oligomer formation into its unstructured form or promote non-toxic pathways and suggested to be valuable drug candidates for PD and related synucleinopathy. Current evidences from in vitro studies require confirmation in the in vivo studies. Further studies are needed to ascertain their potential effects and safety in preclinical studies for pharmaceutical/nutritional development of these phytochemicals or dietary inclusion of the plant extracts in PD treatment.
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Affiliation(s)
- Hayate Javed
- Department of Anatomy, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Mohamed Fizur Nagoor Meeran
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Sheikh Azimullah
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Abdu Adem
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Bassem Sadek
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Shreesh Kumar Ojha
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
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120
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Uncovering the Neuroprotective Mechanisms of Curcumin on Transthyretin Amyloidosis. Int J Mol Sci 2019; 20:ijms20061287. [PMID: 30875761 PMCID: PMC6471102 DOI: 10.3390/ijms20061287] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/02/2019] [Accepted: 03/07/2019] [Indexed: 02/07/2023] Open
Abstract
Transthyretin (TTR) amyloidoses (ATTR amyloidosis) are diseases associated with transthyretin (TTR) misfolding, aggregation and extracellular deposition in tissues as amyloid. Clinical manifestations of the disease are variable and include mainly polyneuropathy and/or cardiomyopathy. The reasons why TTR forms aggregates and amyloid are related with amino acid substitutions in the protein due to mutations, or with environmental alterations associated with aging, that make the protein more unstable and prone to aggregation. According to this model, several therapeutic approaches have been proposed for the diseases that range from stabilization of TTR, using chemical chaperones, to clearance of the aggregated protein deposited in tissues in the form of oligomers or small aggregates, by the action of disruptors or by activation of the immune system. Interestingly, different studies revealed that curcumin presents anti-amyloid properties, targeting multiple steps in the ATTR amyloidogenic cascade. The effects of curcumin on ATTR amyloidosis will be reviewed and discussed in the current work in order to contribute to knowledge of the molecular mechanisms involved in TTR amyloidosis and propose more efficient drugs for therapy.
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121
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Varaprasad K, Yallapu MM, Núñez D, Oyarzún P, López M, Jayaramudu T, Karthikeyan C. Generation of engineered core-shell antibiotic nanoparticles. RSC Adv 2019; 9:8326-8332. [PMID: 31131098 PMCID: PMC6472438 DOI: 10.1039/c9ra00536f] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 03/06/2019] [Indexed: 01/17/2023] Open
Abstract
Well-defined nanocomposite structures have received significant attention due to their superior combinatorial properties. Rational tuning of the core and shell of the nanostructure(s) can offer potent antibacterial activity. Such advanced core–shell nanocomposite methodologies allow not only the incorporation of antibacterial agents on the shell but also provide its stability and nurture antibacterial activity. Herein, antibiotic zinc oxide–curcumin (ZnO–Cum) core–shell nanoparticles for antibacterial application were synthesised. The ZnO–Cum core–shell nanoparticles were prepared by curcumin nanolayer deposition on zinc oxide nanoparticles via a sonication process. The resulting ZnO–Cum core–shell nanoparticles were spiracle in shape with a ∼45 nm ZnO core and ∼12 nm curcumin shell layer size, respectively, determined by transmission electron microscopy. X-ray diffraction analysis confirmed the formation of a core–shell crystal structure. Additionally, UV-DRS and ATR-FTIR spectral analysis support the existence of ZnO and curcumin in a core–shell nanocomposite. The antibacterial activities of nanoparticles developed were studied against Staphylococcus aureus and Streptococcus pneumoniae and Escherichia coli and Shigella dysenteriae bacterial stains using the diffusion method. A greater inhibition of the growth of Gram positive and negative bacteria was noticed upon treatment with core–shell ZnO and curcumin nanoparticles than the commercial antibiotic amoxicillin which indicates their antibacterial property. The findings of this study provide evidence that the zinc oxide–curcumin core–shell nanoparticles may be highly promising for antibacterial and biomedical applications. Antibiotic ZnO–curcumin core–shell nanoparticles were prepared via an ultra-sonication process. ZnO–curcumin exhibited excellent antibacterial capacity compared to the commercial antibiotic amoxicillin.![]()
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Affiliation(s)
- Kokkarachedu Varaprasad
- Centro de Investigación de Polímeros Avanzados, CIPA, Edificio de Laboratorios, Avenida Collao 1202, Concepción, Bio-Bio, Chile. ;
| | - Murali Mohan Yallapu
- Department of Pharmaceutical Sciences and Center for Cancer Research, University of Tennessee Health Science Center, Memphis, TN 38105, USA
| | - Dariela Núñez
- Centro de Investigación de Polímeros Avanzados, CIPA, Edificio de Laboratorios, Avenida Collao 1202, Concepción, Bio-Bio, Chile. ;
| | - Patricio Oyarzún
- Facultad de Ingeniería y Tecnología, Universidad San Sebastián, Lientur 1457, Concepción, Chile
| | - Matias López
- Centro de Investigación de Polímeros Avanzados, CIPA, Edificio de Laboratorios, Avenida Collao 1202, Concepción, Bio-Bio, Chile. ; .,Facultad de Ingeniería y Tecnología, Universidad San Sebastián, Lientur 1457, Concepción, Chile
| | - Tippabattini Jayaramudu
- Laboratory of Material Sciences, Instituto de Quimica de Recursos Naturales, Universidad de Talca, Talca, Chile
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122
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α-Synuclein misfolding and aggregation: Implications in Parkinson's disease pathogenesis. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2019; 1867:890-908. [PMID: 30853581 DOI: 10.1016/j.bbapap.2019.03.001] [Citation(s) in RCA: 234] [Impact Index Per Article: 46.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Revised: 03/03/2019] [Accepted: 03/05/2019] [Indexed: 12/21/2022]
Abstract
α-Synuclein (α-Syn) has been extensively studied for its structural and biophysical properties owing to its pathophysiological role in Parkinson's disease (PD). Lewy bodies and Lewy neurites are the pathological hallmarks of PD and contain α-Syn aggregates as their major component. It was therefore hypothesized that α-Syn aggregation is actively associated with PD pathogenesis. The central role of α-Syn aggregation in PD is further supported by the identification of point mutations in α-Syn protein associated with rare familial forms of PD. However, the correlation between aggregation propensities of α-Syn mutants and their association with PD phenotype is not straightforward. Recent evidence suggested that oligomers, formed during the initial stages of aggregation, are the potent neurotoxic species causing cell death in PD. However, the heterogeneous and unstable nature of these oligomers limit their detailed characterization. α-Syn fibrils, on the contrary, are shown to be the infectious agents and propagate in a prion-like manner. Although α-Syn is an intrinsically disordered protein, it exhibits remarkable conformational plasticity by adopting a range of structural conformations under different environmental conditions. In this review, we focus on the structural and functional aspects of α-Syn and role of potential factors that may contribute to the underlying mechanism of synucleinopathies. This information will help to identify novel targets and develop specific therapeutic strategies to combat Parkinson's and other protein aggregation related neurodegenerative diseases.
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123
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Veys L, Vandenabeele M, Ortuño-Lizarán I, Baekelandt V, Cuenca N, Moons L, De Groef L. Retinal α-synuclein deposits in Parkinson's disease patients and animal models. Acta Neuropathol 2019; 137:379-395. [PMID: 30721408 DOI: 10.1007/s00401-018-01956-z] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 12/22/2018] [Accepted: 12/22/2018] [Indexed: 12/21/2022]
Abstract
Despite decades of research, accurate diagnosis of Parkinson's disease remains a challenge, and disease-modifying treatments are still lacking. Research into the early (presymptomatic) stages of Parkinson's disease and the discovery of novel biomarkers is of utmost importance to reduce this burden and to come to a more accurate diagnosis at the very onset of the disease. Many have speculated that non-motor symptoms could provide a breakthrough in the quest for early biomarkers of Parkinson's disease, including the visual disturbances and retinal abnormalities that are seen in the majority of Parkinson's disease patients. An expanding number of clinical studies have investigated the use of in vivo assessments of retinal structure, electrophysiological function, and vision-driven tasks as novel means for identifying patients at risk that need further neurological examination and for longitudinal follow-up of disease progression in Parkinson's disease patients. Often, the results of these studies have been interpreted in relation to α-synuclein deposits and dopamine deficiency in the retina, mirroring the defining pathological features of Parkinson's disease in the brain. To better understand the visual defects seen in Parkinson's disease patients and to propel the use of retinal changes as biomarkers for Parkinson's disease, however, more conclusive neuropathological evidence for the presence of retinal α-synuclein aggregates, and its relation to the cerebral α-synuclein burden, is urgently needed. This review provides a comprehensive and critical overview of the research conducted to unveil α-synuclein aggregates in the retina of Parkinson's disease patients and animal models, and thereby aims to aid the ongoing discussion about the potential use of the retinal changes and/or visual symptoms as biomarkers for Parkinson's disease.
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124
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Siposova K, Kozar T, Huntosova V, Tomkova S, Musatov A. Inhibition of amyloid fibril formation and disassembly of pre-formed fibrils by natural polyphenol rottlerin. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2019; 1867:259-274. [DOI: 10.1016/j.bbapap.2018.10.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 09/18/2018] [Accepted: 10/08/2018] [Indexed: 12/15/2022]
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125
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Naoi M, Shamoto-Nagai M, Maruyama W. Neuroprotection of multifunctional phytochemicals as novel therapeutic strategy for neurodegenerative disorders: antiapoptotic and antiamyloidogenic activities by modulation of cellular signal pathways. FUTURE NEUROLOGY 2019. [DOI: 10.2217/fnl-2018-0028] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In neurodegenerative disorders, including Alzheimer's and Parkinson's disease, neuroprotection by diet and natural bioactive compounds has been proposed to prevent the onset and progress of neurodegeneration by modification of pathogenic factors. Plant food-derived phytochemicals protect neurons via targeting oxidative stress, mitochondrial dysfunction, neurotrophic factor deficit, apoptosis and abnormal protein accumulation. This review presents the molecular mechanism of neuroprotection by phytochemicals: direct regulation of mitochondrial apoptotic machinery, modification of cellular signal pathways, induction of antiapoptotic Bcl-2 protein family and prosurvival neurotrophic factors, such as brain- and glial cell line-derived neurotrophic factor, and prevention of protein aggregation. Multitargeted neuroprotective agents are under development based on the structure of blood–brain barrier-permeable phytochemicals to ameliorate brain dysfunction and prevent neurodegeneration.
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Affiliation(s)
- Makoto Naoi
- Department of Health & Nutrition, Faculty of Psychological & Physical Science, Aichi Gakuin University, Nisshin, Aichi, Japan
| | - Masayo Shamoto-Nagai
- Department of Health & Nutrition, Faculty of Psychological & Physical Science, Aichi Gakuin University, Nisshin, Aichi, Japan
| | - Wakako Maruyama
- Department of Health & Nutrition, Faculty of Psychological & Physical Science, Aichi Gakuin University, Nisshin, Aichi, Japan
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126
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Oliveri V. Toward the discovery and development of effective modulators of α-synuclein amyloid aggregation. Eur J Med Chem 2019; 167:10-36. [PMID: 30743095 DOI: 10.1016/j.ejmech.2019.01.045] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 01/21/2019] [Accepted: 01/21/2019] [Indexed: 12/17/2022]
Abstract
A host of human diseases, including Parkinson's disease and Dementia with Lewy bodies, are suspected to be directly linked to protein aggregation. Amyloid protein aggregates and oligomeric intermediates of α-synuclein are observed in synucleinopathies and considered to be mediators of cellular toxicity. Hence, α-synuclein has seen as one of the leading and most compelling targets and is receiving a great deal of attention from researchers. Nevertheless, there is no neuroprotective approach directed toward Parkinson's disease or other synucleinopathies so far. In this review, we summarize the available data concerning inhibitors of α-synuclein aggregation and their advancing towards clinical use. The compounds are grouped according to their chemical structures, providing respective insights into their mechanism of action, pharmacology, and pharmacokinetics. Overall, shared structure-activity elements are emerging, as well as specific binding modes related to the ability of the modulators to establish hydrophobic and hydrogen bonds interactions with the protein. Some molecules with encouraging in vivo data support the possibility of translation to the clinic.
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Affiliation(s)
- Valentina Oliveri
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, viale A. Doria 6, 95125, Catania, Italy.
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127
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Jia L, Wang Y, Wei W, Zhao W, Lu F, Liu F. Vitamin B12 inhibits α-synuclein fibrillogenesis and protects against amyloid-induced cytotoxicity. Food Funct 2019; 10:2861-2870. [DOI: 10.1039/c8fo02471e] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
VB12, a necessary micronutrient, is a potential functional factor to ameliorate PD by inhibiting α-synuclein fibrillogenesis and reducing cytotoxicity.
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Affiliation(s)
- Longgang Jia
- State Key Laboratory of Food Nutrition and Safety
- Tianjin
- P. R. China
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
| | - Ying Wang
- State Key Laboratory of Food Nutrition and Safety
- Tianjin
- P. R. China
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
| | - Wei Wei
- State Key Laboratory of Food Nutrition and Safety
- Tianjin
- P. R. China
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
| | - Wenping Zhao
- State Key Laboratory of Food Nutrition and Safety
- Tianjin
- P. R. China
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
| | - Fuping Lu
- State Key Laboratory of Food Nutrition and Safety
- Tianjin
- P. R. China
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
| | - Fufeng Liu
- State Key Laboratory of Food Nutrition and Safety
- Tianjin
- P. R. China
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
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128
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Bopardikar M, Bhattacharya A, Rao Kakita VM, Rachineni K, Borde LC, Choudhary S, Koti Ainavarapu SR, Hosur RV. Triphala inhibits alpha-synuclein fibrillization and their interaction study by NMR provides insights into the self-association of the protein. RSC Adv 2019; 9:28470-28477. [PMID: 35529629 PMCID: PMC9071048 DOI: 10.1039/c9ra05551g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 08/31/2019] [Indexed: 11/21/2022] Open
Abstract
The process of assembly and accumulation of the intrinsically disordered protein (IDP), alpha-synuclein (αSyn) into amyloid fibrils is a pathogenic process leading to several neurodegenerative disorders such as Parkinson's disease, multiple system atrophy and others. Although several molecules are known to inhibit αSyn fibrillization, the mechanism of inhibition is just beginning to emerge. Here, we report the inhibition of fibrillization of αSyn by Triphala, a herbal preparation in the traditional Indian medical system of Ayurveda. Triphala was found to be a rich source of polyphenols which are known to act as amyloid inhibitors. ThT fluorescence and TEM studies showed that Triphala inhibited the fibrillization of αSyn. However, it was observed that Triphala does not disaggregate preformed αSyn fibrils. Further, native-PAGE showed that Triphala reduces the propensity of αSyn to oligomerize during the lag phase of fibrillization. Our NMR results showed that certain stretches of residues in the N-terminal and NAC regions of αSyn play an anchor role in the self-association process of the protein, thereby providing mechanistic insights into the early events during αSyn fibrillization. Triphala inhibits αSyn self-association by interacting with anchoring regions which are responsible for αSyn oligomerization.![]()
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Affiliation(s)
- Mandar Bopardikar
- Department of Chemical Sciences
- Tata Institute of Fundamental Research
- Mumbai 400005
- India
| | - Anusri Bhattacharya
- UM-DAE Centre for Excellence in Basic Sciences
- University of Mumbai
- Kalina Campus
- Mumbai 400098
- India
| | - Veera Mohana Rao Kakita
- UM-DAE Centre for Excellence in Basic Sciences
- University of Mumbai
- Kalina Campus
- Mumbai 400098
- India
| | - Kavitha Rachineni
- UM-DAE Centre for Excellence in Basic Sciences
- University of Mumbai
- Kalina Campus
- Mumbai 400098
- India
| | - Lalit C. Borde
- Department of Biological Sciences
- Tata Institute of Fundamental Research
- Mumbai 400005
- India
| | - Sinjan Choudhary
- UM-DAE Centre for Excellence in Basic Sciences
- University of Mumbai
- Kalina Campus
- Mumbai 400098
- India
| | | | - Ramakrishna V. Hosur
- Department of Chemical Sciences
- Tata Institute of Fundamental Research
- Mumbai 400005
- India
- UM-DAE Centre for Excellence in Basic Sciences
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129
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Mohite GM, Dwivedi S, Das S, Kumar R, Paluri S, Mehra S, Ruhela N, S A, Jha NN, Maji SK. Parkinson's Disease Associated α-Synuclein Familial Mutants Promote Dopaminergic Neuronal Death in Drosophila melanogaster. ACS Chem Neurosci 2018; 9:2628-2638. [PMID: 29906099 DOI: 10.1021/acschemneuro.8b00107] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
α-Synuclein (α-Syn) aggregation and amyloid formation are associated with loss of dopaminergic neurons in Parkinson's disease (PD). In addition, familial mutations in α-Syn are shown to be one of the definite causes of PD. Here we have extensively studied familial PD associated α-Syn G51D, H50Q, and E46K mutations using Drosophila model system. Our data showed that flies expressing α-Syn familial mutants have a shorter lifespan and exhibit more climbing defects compared to wild-type (WT) flies in an age-dependent manner. The immunofluorescence studies of the brain from the old flies showed more dopaminergic neuronal cell death in all mutants compared to WT. This adverse effect of α-Syn familial mutations is highly correlated with the sustained population of oligomer production and retention in mutant flies. Furthermore, this was supported by our in vitro studies, where significantly higher amount of oligomer was observed in mutants compared to WT. The data suggest that the sustained population of oligomer formation and retention could be a major cause of cell death in α-Syn familial mutants.
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Affiliation(s)
- Ganesh M. Mohite
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Saumya Dwivedi
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Subhadeep Das
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
- IITB-Monash Research Academy, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Rakesh Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Sravya Paluri
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Surabhi Mehra
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Neha Ruhela
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Arunima S
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Narendra Nath Jha
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Samir K. Maji
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
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130
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Abdur Razzak M, Lee JE, Park HH, Park TH, Choi SS. Exploring Binding Mechanisms between Curcumin and Silkworm 30Kc19 Protein Using Spectroscopic Analyses and Computational Simulations. BIOTECHNOL BIOPROC E 2018. [DOI: 10.1007/s12257-018-0285-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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131
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Saha S, Khan MA, Mudhara D, Deep S. Tuning the Balance between Fibrillation and Oligomerization of α-Synuclein in the Presence of Dopamine. ACS OMEGA 2018; 3:14213-14224. [PMID: 30411062 PMCID: PMC6217689 DOI: 10.1021/acsomega.8b00993] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 10/02/2018] [Indexed: 05/19/2023]
Abstract
The aggregates of α-synuclein bear a close connection with Parkinson's disease, which is largely characterized by the loss of the dopaminergic neurons. Dopamine promotes the formation of undesirable sodium dodecyl sulfate (SDS)-resistant oligomers of α-synuclein. In this study, we have shown that the inhibition of fibrillation by an additive may not always be the ultimate deciding factor in the context of its potential as a successful additive. Copper promotes the fibrillation of α-synuclein in buffer alone but inhibits the formation of SDS-resistant oligomers in the presence of dopamine. Glycerol, on the other hand, increases the population of such dopamine-mediated SDS-resistant oligomers. We speculate such an effect to be a manifestation of the distinct oxidation pathway of dopamine in the presence of copper.
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132
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A review on iron chelators as potential therapeutic agents for the treatment of Alzheimer’s and Parkinson’s diseases. Mol Divers 2018; 23:509-526. [DOI: 10.1007/s11030-018-9878-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 09/25/2018] [Indexed: 12/19/2022]
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133
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Menadione sodium bisulfite inhibits the toxic aggregation of amyloid-β(1–42). Biochim Biophys Acta Gen Subj 2018; 1862:2226-2235. [DOI: 10.1016/j.bbagen.2018.07.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 06/22/2018] [Accepted: 07/17/2018] [Indexed: 12/16/2022]
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134
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Wongkongkathep P, Han JY, Choi TS, Yin S, Kim HI, Loo JA. Native Top-Down Mass Spectrometry and Ion Mobility MS for Characterizing the Cobalt and Manganese Metal Binding of α-Synuclein Protein. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2018; 29:1870-1880. [PMID: 29951842 PMCID: PMC6087494 DOI: 10.1007/s13361-018-2002-2] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 05/27/2018] [Accepted: 05/29/2018] [Indexed: 05/22/2023]
Abstract
Structural characterization of intrinsically disordered proteins (IDPs) has been a major challenge in the field of protein science due to limited capabilities to obtain full-length high-resolution structures. Native ESI-MS with top-down MS was utilized to obtain structural features of protein-ligand binding for the Parkinson's disease-related protein, α-synuclein (αSyn), which is natively unstructured. Binding of heavy metals has been implicated in the accelerated formation of αSyn aggregation. Using high-resolution Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry, native top-down MS with various fragmentation methods, including electron capture dissociation (ECD), collisional activated dissociation (CAD), and multistage tandem MS (MS3), deduced the binding sites of cobalt and manganese to the C-terminal region of the protein. Ion mobility MS (IM-MS) revealed a collapse toward compacted states of αSyn upon metal binding. The combination of native top-down MS and IM-MS provides structural information of protein-ligand interactions for intrinsically disordered proteins. Graphical Abstract ᅟ.
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Affiliation(s)
- Piriya Wongkongkathep
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, CA, 90095, USA
- Center of Excellence in Systems Biology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Jong Yoon Han
- Department of Chemistry, Korea University, Seoul, Republic of Korea
| | - Tae Su Choi
- Department of Chemistry, Korea University, Seoul, Republic of Korea
| | - Sheng Yin
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, CA, 90095, USA
| | - Hugh I Kim
- Department of Chemistry, Korea University, Seoul, Republic of Korea
| | - Joseph A Loo
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, CA, 90095, USA.
- Department of Biological Chemistry, David Geffen School of Medicine at UCLA, UCLA Molecular Biology Institute, and UCLA/DOE Institute for Genomics and Proteomics, University of California-Los Angeles, Los Angeles, CA, 90095, USA.
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135
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Derf A, Mudududdla R, Akintade D, Williams IS, Abdullaha M, Chaudhuri B, Bharate SB. Nonantioxidant Tetramethoxystilbene Abrogates α-Synuclein-Induced Yeast Cell Death but Not That Triggered by the Bax or βA4 Peptide. ACS OMEGA 2018; 3:9513-9532. [PMID: 31459084 PMCID: PMC6645319 DOI: 10.1021/acsomega.8b01154] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Accepted: 08/02/2018] [Indexed: 06/10/2023]
Abstract
The overexpression of α-synuclein (α-syn) and its aggregation is the hallmark of Parkinson's disease. The α-syn aggregation results in the formation of Lewy bodies that causes neuronal cell death. Therefore, the small molecules that can protect neuronal cells from α-syn toxicity or inhibit the aggregation of α-syn could emerge as anti-Parkinson agents. Herein, a library of methoxy-stilbenes was screened for their ability to restore the cell growth from α-syn toxicity, using a yeast strain that stably expresses two copies of a chromosomally integrated human α-syn gene. Tetramethoxy-stilbene 4s, a nonantioxidant, was the most capable of restoring cell growth. It also rescues the more toxic cells that bear three copies of wild-type or A53T-mutant α-syn, from cell growth block. Its EC50 values for growth restoration of the 2-copy wild-type and the 3-copy mutant α-syn strains are 0.95 and 0.35 μM, respectively. Stilbene 4s mitigates mitochondrial membrane potential loss, negates ROS production, and prevents nuclear DNA-fragmentation, all hallmarks of apoptosis. However, 4s does not rescue cells from the death-inducing effects of Bax and βA4, which suggest that 4s specifically inhibits α-syn-mediated toxicity in the yeast. Our results signify that simultaneous use of multiple yeast-cell-based screens can facilitate revelation of compounds that may have the potential for further investigation as anti-Parkinson's agents.
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Affiliation(s)
- Asma Derf
- Leicester
School of Pharmacy, De Montfort University, Leicester LE1 7RH, U.K.
- CYP
Design Ltd, Innovation Centre, 49 Oxford Street, Leicester LE1 5XY, U.K.
| | - Ramesh Mudududdla
- Medicinal
Chemistry Division, Indian Institute of
Integrative Medicine (CSIR), Canal Road, Jammu 180001, India
- Academy
of Scientific & Innovative Research, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu 180001, India
| | - Damilare Akintade
- Leicester
School of Pharmacy, De Montfort University, Leicester LE1 7RH, U.K.
| | - Ibidapo S. Williams
- Leicester
School of Pharmacy, De Montfort University, Leicester LE1 7RH, U.K.
| | - Mohd Abdullaha
- Medicinal
Chemistry Division, Indian Institute of
Integrative Medicine (CSIR), Canal Road, Jammu 180001, India
- Academy
of Scientific & Innovative Research, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu 180001, India
| | - Bhabatosh Chaudhuri
- Leicester
School of Pharmacy, De Montfort University, Leicester LE1 7RH, U.K.
- CYP
Design Ltd, Innovation Centre, 49 Oxford Street, Leicester LE1 5XY, U.K.
| | - Sandip B. Bharate
- Medicinal
Chemistry Division, Indian Institute of
Integrative Medicine (CSIR), Canal Road, Jammu 180001, India
- Academy
of Scientific & Innovative Research, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu 180001, India
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136
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Savelieff MG, Nam G, Kang J, Lee HJ, Lee M, Lim MH. Development of Multifunctional Molecules as Potential Therapeutic Candidates for Alzheimer’s Disease, Parkinson’s Disease, and Amyotrophic Lateral Sclerosis in the Last Decade. Chem Rev 2018; 119:1221-1322. [DOI: 10.1021/acs.chemrev.8b00138] [Citation(s) in RCA: 270] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Masha G. Savelieff
- SciGency Science Communications, Ann Arbor, Michigan 48104, United States
| | - Geewoo Nam
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Juhye Kang
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Hyuck Jin Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Misun Lee
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Mi Hee Lim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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137
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Liu Z, Wang C, Li Y, Zhao C, Li T, Li D, Zhang S, Liu C. Mechanistic insights into the switch of αB-crystallin chaperone activity and self-multimerization. J Biol Chem 2018; 293:14880-14890. [PMID: 30076220 DOI: 10.1074/jbc.ra118.004034] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 07/25/2018] [Indexed: 12/15/2022] Open
Abstract
αB-Crystallin (αBc) is a small heat shock protein that protects cells against abnormal protein aggregation and disease-related degeneration. αBc is also a major structural protein that forms polydisperse multimers that maintain the liquid-like property of the eye lens. However, the relationship and regulation of the two functions have yet to be explored. Here, by combining NMR spectroscopy and multiple biophysical approaches, we found that αBc uses a conserved β4/β8 surface of the central α-crystallin domain to bind α-synuclein and Tau proteins and prevent them from aggregating into pathological amyloids. We noted that this amyloid-binding surface can also bind the C-terminal IPI motif of αBc, which mediates αBc multimerization and weakens its chaperone activity. We further show that disruption of the IPI binding impairs αBc self-multimerization but enhances its chaperone activity. Our work discloses the structural mechanism underlying the regulation of αBc chaperone activity and self-multimerization and sheds light on the different functions of αBc in antagonizing neurodegeneration and maintaining eye lens liquidity.
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Affiliation(s)
- Zhenying Liu
- From the Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 26 Qiuyue Road, Shanghai 201210, China.,University of the Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Chuchu Wang
- From the Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 26 Qiuyue Road, Shanghai 201210, China.,University of the Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Yichen Li
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai 200030, China, and
| | - Chunyu Zhao
- From the Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 26 Qiuyue Road, Shanghai 201210, China.,University of the Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Tongzhou Li
- From the Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 26 Qiuyue Road, Shanghai 201210, China.,University of the Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Dan Li
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai 200030, China, and
| | - Shengnan Zhang
- From the Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 26 Qiuyue Road, Shanghai 201210, China,
| | - Cong Liu
- From the Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 26 Qiuyue Road, Shanghai 201210, China,
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138
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Nieto CI, Cornago MP, Cabildo MP, Sanz D, Claramunt RM, Torralba MC, Torres MR, Martínez Casanova D, Sánchez-Alegre YR, Escudero E, Lavandera JL. Evaluation of the Antioxidant and Neuroprotectant Activities of New Asymmetrical 1,3-Diketones. Molecules 2018; 23:E1837. [PMID: 30042315 PMCID: PMC6222706 DOI: 10.3390/molecules23081837] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 07/16/2018] [Accepted: 07/17/2018] [Indexed: 01/08/2023] Open
Abstract
A series of fourteen new asymmetrical 1,3-diketone derivatives have been synthesized and evaluated in the ABTS, FRAP and DPPH assays as a new chemotype with antioxidant and drug-like properties. All the compounds displayed low cytotoxicity in comparison to curcumin against the human neuroblastoma SH-SY5Y cell line. Among them, (3Z,5E)-6-(2,5-difluoro-4-hydroxy-phenyl)-1,1,1-trifluoro-4-hydroxyhexa-3,5-dien-2-one (6b) and (3Z,5E)-6-(2,3-difluoro-4-hydroxy-phenyl)-1,1,1-trifluoro-4-hydroxyhexa-3,5-dien-2-one (7b) with excellent solubility and chemical stability in biorelevant media, have also shown a similar Fe+2 chelation behavior to that of curcumin. Additionally, both derivatives 6b and 7b have afforded good neuroprotection activity against H₂O₂ induced oxidative stress in the same neuronal cell line, with a significant reduction of intracellular ROS levels, in parallel with a good recovery of the Mitochondrial Membrane Potential (ΔΨm). Compounds 6b and 7b with a promising antioxidant and drug-like profile, with low cytotoxic and good neuroprotectant activity, constitute a new interesting chemical class with high potential as new therapeutic agents against neurodegenerative diseases.
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Affiliation(s)
- Carla I Nieto
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, Universidad Nacional de Educación a distancia (UNED), Paseo Senda del Rey 9, E-28040 Madrid, Spain.
| | - María Pilar Cornago
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, Universidad Nacional de Educación a distancia (UNED), Paseo Senda del Rey 9, E-28040 Madrid, Spain.
| | - María Pilar Cabildo
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, Universidad Nacional de Educación a distancia (UNED), Paseo Senda del Rey 9, E-28040 Madrid, Spain.
| | - Dionisia Sanz
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, Universidad Nacional de Educación a distancia (UNED), Paseo Senda del Rey 9, E-28040 Madrid, Spain.
| | - Rosa M Claramunt
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, Universidad Nacional de Educación a distancia (UNED), Paseo Senda del Rey 9, E-28040 Madrid, Spain.
| | - María Carmen Torralba
- Departamento de Química Inorgánica I and CAI de Difracción de Rayos-X, Facultad de Ciencias Químicas, Universidad Complutense de Madrid (UCM), E-28040 Madrid, Spain.
| | - María Rosario Torres
- Departamento de Química Inorgánica I and CAI de Difracción de Rayos-X, Facultad de Ciencias Químicas, Universidad Complutense de Madrid (UCM), E-28040 Madrid, Spain.
| | - Diana Martínez Casanova
- Instituto de Medicina Molecular Aplicada (IMMA), Facultad de Medicina, Universidad CEU San Pablo, Campus de Montepríncipe, Boadilla, E-28668 Madrid, Spain.
| | - Yaiza Rebeca Sánchez-Alegre
- Instituto de Medicina Molecular Aplicada (IMMA), Facultad de Medicina, Universidad CEU San Pablo, Campus de Montepríncipe, Boadilla, E-28668 Madrid, Spain.
| | - Esther Escudero
- Instituto de Medicina Molecular Aplicada (IMMA), Facultad de Medicina, Universidad CEU San Pablo, Campus de Montepríncipe, Boadilla, E-28668 Madrid, Spain.
| | - José Luis Lavandera
- Instituto de Medicina Molecular Aplicada (IMMA), Facultad de Medicina, Universidad CEU San Pablo, Campus de Montepríncipe, Boadilla, E-28668 Madrid, Spain.
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139
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Chuang EY, Lin KJ, Huang TY, Chen HL, Miao YB, Lin PY, Chen CT, Juang JH, Sung HW. An Intestinal "Transformers"-like Nanocarrier System for Enhancing the Oral Bioavailability of Poorly Water-Soluble Drugs. ACS NANO 2018; 12:6389-6397. [PMID: 29856923 DOI: 10.1021/acsnano.8b00470] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Increasing the intestinal dissolution of orally administered poorly water-soluble drugs that have poor oral bioavailability to a therapeutically effective level has long been an elusive goal. In this work, an approach that can greatly enhance the oral bioavailability of a poorly water-soluble drug such as curcumin (CUR) is developed, using a "Transformers"-like nanocarrier system (TLNS) that can self-emulsify the drug molecules in the intestinal lumen to form nanoemulsions. Owing to its known anti-inflammation activity, the use of CUR in treating pancreatitis is evaluated herein. Structural changes of the TLNS in the intestinal environment to form the CUR-laden nanoemulsions are confirmed in vitro. The therapeutic efficacy of this TLNS is evaluated in rats with experimentally induced acute pancreatitis (AP). Notably, the CUR-laden nanoemulsions that are obtained using the proposed TLNS can passively target intestinal M cells, in which they are transcytosed and then transported into the pancreatic tissues via the intestinal lymphatic system. The pancreases in rats that are treated with the TLNS yield approximately 12 times stronger CUR signals than their counterparts receiving free CUR, potentially improving the recovery of AP. These findings demonstrate that the proposed TLNS can markedly increase the intestinal drug dissolution, making oral delivery a favorable noninvasive means of administering poorly water-soluble drugs.
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Affiliation(s)
- Er-Yuan Chuang
- Graduate Institute of Biomedical Materials and Tissue Engineering , Taipei Medical University , Taipei 11049 , Taiwan (ROC)
| | - Kun-Ju Lin
- Department of Nuclear Medicine and Molecular Imaging Center , Chang Gung Memorial Hospital , Taoyuan 333 , Taiwan (ROC)
| | - Tring-Yo Huang
- Department of Chemical Engineering and Frontier Research Center on Fundamental and Applied Sciences of Matters , National Tsing Hua University , Hsinchu 30013 , Taiwan (ROC)
| | - Hsin-Lung Chen
- Department of Chemical Engineering and Frontier Research Center on Fundamental and Applied Sciences of Matters , National Tsing Hua University , Hsinchu 30013 , Taiwan (ROC)
| | - Yang-Bao Miao
- Department of Chemical Engineering and Frontier Research Center on Fundamental and Applied Sciences of Matters , National Tsing Hua University , Hsinchu 30013 , Taiwan (ROC)
| | - Po-Yen Lin
- Department of Chemical Engineering and Frontier Research Center on Fundamental and Applied Sciences of Matters , National Tsing Hua University , Hsinchu 30013 , Taiwan (ROC)
| | - Chiung-Tong Chen
- Institute of Biotechnology and Pharmaceutical Research , National Health Research Institutes , Zhunan , Miaoli 35053 , Taiwan (ROC)
| | - Jyuhn-Huarng Juang
- Division of Endocrinology and Metabolism , Chang Gung University and Memorial Hospital , Taoyuan 333 , Taiwan (ROC)
| | - Hsing-Wen Sung
- Department of Chemical Engineering and Frontier Research Center on Fundamental and Applied Sciences of Matters , National Tsing Hua University , Hsinchu 30013 , Taiwan (ROC)
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140
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Mohite GM, Navalkar A, Kumar R, Mehra S, Das S, Gadhe LG, Ghosh D, Alias B, Chandrawanshi V, Ramakrishnan A, Mehra S, Maji SK. The Familial α-Synuclein A53E Mutation Enhances Cell Death in Response to Environmental Toxins Due to a Larger Population of Oligomers. Biochemistry 2018; 57:5014-5028. [DOI: 10.1021/acs.biochem.8b00321] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ganesh M. Mohite
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Ambuja Navalkar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Rakesh Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Surabhi Mehra
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Subhadeep Das
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India 400076
- IITB-Monash Research Academy, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Laxmikant G. Gadhe
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Dhiman Ghosh
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Basil Alias
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Vikas Chandrawanshi
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Aishwarya Ramakrishnan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Sarika Mehra
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Samir K. Maji
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India 400076
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141
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Kirti S, Patel K, Das S, Shrimali P, Samanta S, Kumar R, Chatterjee D, Ghosh D, Kumar A, Tayalia P, Maji SK. Amyloid Fibrils with Positive Charge Enhance Retroviral Transduction in Mammalian Cells. ACS Biomater Sci Eng 2018; 5:126-138. [DOI: 10.1021/acsbiomaterials.8b00248] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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142
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Mehra S, Ghosh D, Kumar R, Mondal M, Gadhe LG, Das S, Anoop A, Jha NN, Jacob RS, Chatterjee D, Ray S, Singh N, Kumar A, Maji SK. Glycosaminoglycans have variable effects on α-synuclein aggregation and differentially affect the activities of the resulting amyloid fibrils. J Biol Chem 2018; 293:12975-12991. [PMID: 29959225 DOI: 10.1074/jbc.ra118.004267] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 06/22/2018] [Indexed: 01/06/2023] Open
Abstract
Parkinson's disease is mainly a sporadic disorder in which both environmental and cellular factors play a major role in the initiation of this disease. Glycosaminoglycans (GAG) are integral components of the extracellular matrix and are known to influence amyloid aggregation of several proteins, including α-synuclein (α-Syn). However, the mechanism by which different GAGs and related biological polymers influence protein aggregation and the structure and intercellular spread of these aggregates remains elusive. In this study, we used three different GAGs and related charged polymers to establish their role in α-Syn aggregation and associated biological activities of these aggregates. Heparin, a representative GAG, affected α-Syn aggregation in a concentration-dependent manner, whereas biphasic α-Syn aggregation kinetics was observed in the presence of chondroitin sulfate B. Of note, as indicated by 2D NMR analysis, different GAGs uniquely modulated α-Syn aggregation because of the diversity of their interactions with soluble α-Syn. Moreover, subtle differences in the GAG backbone structure and charge density significantly altered the properties of the resulting amyloid fibrils. Each GAG/polymer facilitated the formation of morphologically and structurally distinct α-Syn amyloids, which not only displayed variable levels of cytotoxicity but also exhibited an altered ability to internalize into cells. Our study supports the role of GAGs as key modulators in α-Syn amyloid formation, and their distinct activities may regulate amyloidogenesis depending on the type of GAG being up- or down-regulated in vivo.
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Affiliation(s)
- Surabhi Mehra
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
| | - Dhiman Ghosh
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
| | - Rakesh Kumar
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
| | - Mrityunjoy Mondal
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
| | - Laxmikant G Gadhe
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
| | - Subhadeep Das
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and.,the IITB-Monash Research Academy, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Arunagiri Anoop
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
| | - Narendra N Jha
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
| | - Reeba S Jacob
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
| | - Debdeep Chatterjee
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
| | - Soumik Ray
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
| | - Nitu Singh
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
| | - Ashutosh Kumar
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
| | - Samir K Maji
- From the Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India and
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143
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Kuo YC, Rajesh R. Current development of nanocarrier delivery systems for Parkinson's disease pharmacotherapy. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2018.03.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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144
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Maiti P, Dunbar GL. Use of Curcumin, a Natural Polyphenol for Targeting Molecular Pathways in Treating Age-Related Neurodegenerative Diseases. Int J Mol Sci 2018; 19:E1637. [PMID: 29857538 PMCID: PMC6032333 DOI: 10.3390/ijms19061637] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 05/02/2018] [Accepted: 05/25/2018] [Indexed: 12/27/2022] Open
Abstract
Progressive accumulation of misfolded amyloid proteins in intracellular and extracellular spaces is one of the principal reasons for synaptic damage and impairment of neuronal communication in several neurodegenerative diseases. Effective treatments for these diseases are still lacking but remain the focus of much active investigation. Despite testing several synthesized compounds, small molecules, and drugs over the past few decades, very few of them can inhibit aggregation of amyloid proteins and lessen their neurotoxic effects. Recently, the natural polyphenol curcumin (Cur) has been shown to be a promising anti-amyloid, anti-inflammatory and neuroprotective agent for several neurodegenerative diseases. Because of its pleotropic actions on the central nervous system, including preferential binding to amyloid proteins, Cur is being touted as a promising treatment for age-related brain diseases. Here, we focus on molecular targeting of Cur to reduce amyloid burden, rescue neuronal damage, and restore normal cognitive and sensory motor functions in different animal models of neurodegenerative diseases. We specifically highlight Cur as a potential treatment for Alzheimer's, Parkinson's, Huntington's, and prion diseases. In addition, we discuss the major issues and limitations of using Cur for treating these diseases, along with ways of circumventing those shortcomings. Finally, we provide specific recommendations for optimal dosing with Cur for treating neurological diseases.
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Affiliation(s)
- Panchanan Maiti
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Program in Neuroscience, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Department of Psychology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Field Neurosciences Institute, St. Mary's of Michigan, Saginaw, MI 48604, USA.
- Department of Biology, Saginaw Valley State University, Saginaw, MI 48610, USA.
- Brain Research Laboratory, Saginaw Valley State University, Saginaw, MI 48610, USA.
| | - Gary Leo Dunbar
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Program in Neuroscience, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Department of Psychology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Field Neurosciences Institute, St. Mary's of Michigan, Saginaw, MI 48604, USA.
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145
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Oleuropein aglycone stabilizes the monomeric α-synuclein and favours the growth of non-toxic aggregates. Sci Rep 2018; 8:8337. [PMID: 29844450 PMCID: PMC5974307 DOI: 10.1038/s41598-018-26645-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 05/15/2018] [Indexed: 01/03/2023] Open
Abstract
α-synuclein plays a key role in the pathogenesis of Parkinson’s disease (PD); its deposits are found as amyloid fibrils in Lewy bodies and Lewy neurites, the histopathological hallmarks of PD. Amyloid fibrillation is a progressive polymerization path starting from peptide/protein misfolding and proceeding through the transient growth of oligomeric intermediates widely considered as the most toxic species. Consequently, a promising approach of intervention against PD might be preventing α-synuclein build-up, misfolding and aggregation. A possible strategy involves the use of small molecules able to slow down the aggregation process or to alter oligomer conformation favouring the growth of non-pathogenic species. Here, we show that oleuropein aglycone (OleA), the main olive oil polyphenol, exhibits anti-amyloidogenic power in vitro by interacting with, and stabilizing, α-synuclein monomers thus hampering the growth of on-pathway oligomers and favouring the growth of stable and harmless aggregates with no tendency to evolve into other cytotoxic amyloids. We investigated the molecular basis of such interference by both biophysical techniques and limited proteolysis; aggregate morphology was monitored by electron microscopy. We also found that OleA reduces the cytotoxicity of α-synuclein aggregates by hindering their binding to cell membrane components and preventing the resulting oxidative damage to cells.
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146
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Mohite GM, Kumar R, Panigrahi R, Navalkar A, Singh N, Datta D, Mehra S, Ray S, Gadhe LG, Das S, Singh N, Chatterjee D, Kumar A, Maji SK. Comparison of Kinetics, Toxicity, Oligomer Formation, and Membrane Binding Capacity of α-Synuclein Familial Mutations at the A53 Site, Including the Newly Discovered A53V Mutation. Biochemistry 2018; 57:5183-5187. [PMID: 29771508 DOI: 10.1021/acs.biochem.8b00314] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The involvement of α-synuclein (α-Syn) amyloid formation in Parkinson's disease (PD) pathogenesis is supported by the discovery of α-Syn gene (SNCA) mutations linked with familial PD, which are known to modulate the oligomerization and aggregation of α-Syn. Recently, the A53V mutation has been discovered, which leads to late-onset PD. In this study, we characterized for the first time the biophysical properties of A53V, including the aggregation propensities, toxicity of aggregated species, and membrane binding capability, along with those of all familial mutations at the A53 position. Our data suggest that the A53V mutation accelerates fibrillation of α-Syn without affecting the overall morphology or cytotoxicity of fibrils compared to those of the wild-type (WT) protein. The aggregation propensity for A53 mutants is found to decrease in the following order: A53T > A53V > WT > A53E. In addition, a time course aggregation study reveals that the A53V mutant promotes early oligomerization similar to the case for the A53T mutation. It promotes the largest amount of oligomer formation immediately after dissolution, which is cytotoxic. Although in the presence of membrane-mimicking environments, the A53V mutation showed an extent of helix induction capacity similar to that of the WT protein, it exhibited less binding to lipid vesicles. The nuclear magnetic resonance study revealed unique chemical shift perturbations caused by the A53V mutation compared to those caused by other mutations at the A53 site. This study might help to establish the disease-causing mechanism of A53V in PD pathology.
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Affiliation(s)
- Ganesh M Mohite
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Rakesh Kumar
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Rajlaxmi Panigrahi
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Ambuja Navalkar
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Nitu Singh
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Debalina Datta
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Surabhi Mehra
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Soumik Ray
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Laxmikant G Gadhe
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Subhadeep Das
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Namrata Singh
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Debdeep Chatterjee
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Ashutosh Kumar
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
| | - Samir K Maji
- Department of Biosciences and Bioengineering , IIT Bombay , Powai, Mumbai , India 400076
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147
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Menghwar P, Yilmaz E, Soylak M. Development of an ultrasonic-assisted restricted access supramolecular solvent-based liquid phase microextraction (UA-RAS-LPME) method for separation-preconcentration and UV-VIS spectrophotometric detection of curcumin. SEP SCI TECHNOL 2018. [DOI: 10.1080/01496395.2018.1462389] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Pertab Menghwar
- Faculty of Sciences, Department of Chemistry, Erciyes University, Kayseri, Turkey
- National Centre of Excellence in Analytical Chemistry, Universıty of Sindh, Jamshoro, Pakistan
| | - Erkan Yilmaz
- Faculty of Pharmacy, Department of Analytical Chemistry, Erciyes University, Kayseri, Turkey
| | - Mustafa Soylak
- Faculty of Sciences, Department of Chemistry, Erciyes University, Kayseri, Turkey
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148
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Cytotoxic Oligomers and Fibrils Trapped in a Gel-like State of α-Synuclein Assemblies. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/anie.201711854] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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149
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Kumar R, Das S, Mohite GM, Rout SK, Halder S, Jha NN, Ray S, Mehra S, Agarwal V, Maji SK. Cytotoxic Oligomers and Fibrils Trapped in a Gel-like State of α-Synuclein Assemblies. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711854] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Rakesh Kumar
- Department of Biosciences and Bioengineering, IIT Bombay; Powai Mumbai 400076 India
| | - Subhadeep Das
- Department of Biosciences and Bioengineering, IIT Bombay; Powai Mumbai 400076 India
- IITB-Monash Research Academy; IIT Bombay; Powai Mumbai 400076 India
| | - Ganesh M. Mohite
- Department of Biosciences and Bioengineering, IIT Bombay; Powai Mumbai 400076 India
| | - Saroj K. Rout
- Department of Biosciences and Bioengineering, IIT Bombay; Powai Mumbai 400076 India
| | - Saayak Halder
- TIFR Centre for Interdisciplinary Sciences; Tata Institute of Fundamental Research; Sy. No. 36/P, Gopanpally Ranga Reddy District Hyderabad 500 017 India
| | - Narendra Nath Jha
- Department of Biosciences and Bioengineering, IIT Bombay; Powai Mumbai 400076 India
| | - Soumik Ray
- Department of Biosciences and Bioengineering, IIT Bombay; Powai Mumbai 400076 India
| | - Surabhi Mehra
- Department of Biosciences and Bioengineering, IIT Bombay; Powai Mumbai 400076 India
| | - Vipin Agarwal
- TIFR Centre for Interdisciplinary Sciences; Tata Institute of Fundamental Research; Sy. No. 36/P, Gopanpally Ranga Reddy District Hyderabad 500 017 India
| | - Samir K. Maji
- Department of Biosciences and Bioengineering, IIT Bombay; Powai Mumbai 400076 India
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150
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Unravelling the inhibitory activity of Chlamydomonas reinhardtii sulfated polysaccharides against α-Synuclein fibrillation. Sci Rep 2018; 8:5692. [PMID: 29632314 PMCID: PMC5890252 DOI: 10.1038/s41598-018-24079-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 03/26/2018] [Indexed: 01/10/2023] Open
Abstract
α-Synuclein (α-Syn) is an intrinsically disordered presynaptic protein, whose aggregation is critically involved in Parkinson’s disease (PD). Many of the currently available drugs for the treatment of PD are not sufficiently effective in preventing progress of the disease and have multiple side-effects. With this background, efficient drug candidates, sulfated polysaccharides from Chlamydomonas reinhardtii (Cr-SPs) were isolated and investigated for their effect on inhibition of α-Syn fibrillation and dissolution of preformed α-Syn fibrillar structures through a combination of spectroscopic and microscopic techniques. The kinetics of α-Syn fibrillation demonstrates that Cr-SPs are very effective in inhibiting α-Syn fibrillation. Sodium dodecyl sulphate-polyacrylamide gel electrophoresis gel-image shows presence of soluble protein in the presence of Cr-SPs after completion of the fibrillation process. The morphological changes associated with fibrillation monitored by transmission electron microscopy showed that Cr-SPs efficiently bind with α-Syn and delay the conversion of α-helical intermediate into β-sheet rich structures. Cr-SPs are also effective even if onset of α-Syn fibrillation has already started and they also have the ability to dissolve pre-formed fibrils. Thus, the current work has substantial therapeutic implications towards unlocking the immense potential of algal products to function as alternative therapeutic agents against PD and other protein aggregation related disorders.
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