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Abioye A, Akintade D, Mitchell J, Olorode S, Adejare A. Nonintuitive Immunogenicity and Plasticity of Alpha-Synuclein Conformers: A Paradigm for Smart Delivery of Neuro-Immunotherapeutics. Pharmaceutics 2024; 16:609. [PMID: 38794271 PMCID: PMC11124533 DOI: 10.3390/pharmaceutics16050609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 04/25/2024] [Accepted: 04/26/2024] [Indexed: 05/26/2024] Open
Abstract
Despite the extensive research successes and continuous developments in modern medicine in terms of diagnosis, prevention, and treatment, the lack of clinically useful disease-modifying drugs or immunotherapeutic agents that can successfully treat or prevent neurodegenerative diseases is an ongoing challenge. To date, only one of the 244 drugs in clinical trials for the treatment of neurodegenerative diseases has been approved in the past decade, indicating a failure rate of 99.6%. In corollary, the approved monoclonal antibody did not demonstrate significant cognitive benefits. Thus, the prevalence of neurodegenerative diseases is increasing rapidly. Therefore, there is an urgent need for creative approaches to identifying and testing biomarkers for better diagnosis, prevention, and disease-modifying strategies for the treatment of neurodegenerative diseases. Overexpression of the endogenous α-synuclein has been identified as the driving force for the formation of the pathogenic α-synuclein (α-Syn) conformers, resulting in neuroinflammation, hypersensitivity, endogenous homeostatic responses, oxidative dysfunction, and degeneration of dopaminergic neurons in Parkinson's disease (PD). However, the conformational plasticity of α-Syn proffers that a certain level of α-Syn is essential for the survival of neurons. Thus, it exerts both neuroprotective and neurotoxic (regulatory) functions on neighboring neuronal cells. Furthermore, the aberrant metastable α-Syn conformers may be subtle and difficult to detect but may trigger cellular and molecular events including immune responses. It is well documented in literature that the misfolded α-Syn and its conformers that are released into the extracellular space from damaged or dead neurons trigger the innate and adaptive immune responses in PD. Thus, in this review, we discuss the nonintuitive plasticity and immunogenicity of the α-Syn conformers in the brain immune cells and their physiological and pathological consequences on the neuroimmune responses including neuroinflammation, homeostatic remodeling, and cell-specific interactions that promote neuroprotection in PD. We also critically reviewed the novel strategies for immunotherapeutic delivery interventions in PD pathogenesis including immunotherapeutic targets and potential nanoparticle-based smart drug delivery systems. It is envisioned that a greater understanding of the nonintuitive immunogenicity of aberrant α-Syn conformers in the brain's microenvironment would provide a platform for identifying valid therapeutic targets and developing smart brain delivery systems for clinically effective disease-modifying immunotherapeutics that can aid in the prevention and treatment of PD in the future.
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Affiliation(s)
- Amos Abioye
- College of Pharmacy and Health Sciences, Belmont University, Nashville, TN 37212, USA
| | - Damilare Akintade
- Department of Biomedical Sciences, School of Health, Leeds Beckett University, Leeds LS1 3HE, UK; (D.A.); (J.M.); (S.O.)
| | - James Mitchell
- Department of Biomedical Sciences, School of Health, Leeds Beckett University, Leeds LS1 3HE, UK; (D.A.); (J.M.); (S.O.)
| | - Simisade Olorode
- Department of Biomedical Sciences, School of Health, Leeds Beckett University, Leeds LS1 3HE, UK; (D.A.); (J.M.); (S.O.)
| | - Adeboye Adejare
- Department of Pharmaceutical Sciences, Philadelphia College of Pharmacy, Saint Joseph’s University, Philadelphia, PA 19131, USA;
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Bayandina SV, Mukha DV. Saccharomyces cerevisiae as a Model for Studying Human Neurodegenerative Disorders: Viral Capsid Protein Expression. Int J Mol Sci 2023; 24:17213. [PMID: 38139041 PMCID: PMC10743263 DOI: 10.3390/ijms242417213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 11/30/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
In this article, we briefly describe human neurodegenerative diseases (NDs) and the experimental models used to study them. The main focus is the yeast Saccharomyces cerevisiae as an experimental model used to study neurodegenerative processes. We review recent experimental data on the aggregation of human neurodegenerative disease-related proteins in yeast cells. In addition, we describe the results of studies that were designed to investigate the molecular mechanisms that underlie the aggregation of reporter proteins. The advantages and disadvantages of the experimental approaches that are currently used to study the formation of protein aggregates are described. Special attention is given to the similarity between aggregates that form as a result of protein misfolding and viral factories-special structural formations in which viral particles are formed inside virus-infected cells. A separate part of the review is devoted to our previously published study on the formation of aggregates upon expression of the insect densovirus capsid protein in yeast cells. Based on the reviewed results of studies on NDs and related protein aggregation, as well as viral protein aggregation, a new experimental model system for the study of human NDs is proposed. The core of the proposed system is a comparative transcriptomic analysis of changes in signaling pathways during the expression of viral capsid proteins in yeast cells.
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Affiliation(s)
| | - Dmitry V. Mukha
- Vavilov Institute of General Genetics Russian Academy of Sciences, 119991 Moscow, Russia
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Li X, Feng H, Liu S, Cui J, Liu J, Shi M, Zhao J, Wang L. Dehydrin CaDHN2 Enhances Drought Tolerance by Affecting Ascorbic Acid Synthesis under Drought in Peppers. PLANTS (BASEL, SWITZERLAND) 2023; 12:3895. [PMID: 38005792 PMCID: PMC10675185 DOI: 10.3390/plants12223895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 11/03/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023]
Abstract
Peppers (Capsicum annuum L.), as a horticultural crop with one of the highest ascorbic acid contents, are negatively affected by detrimental environmental conditions both in terms of quality and productivity. In peppers, the high level of ascorbic acid is not only a nutrient substance but also plays a role in environmental stress, i.e., drought stress. When suffering from drought stress, plants accumulate dehydrins, which play important roles in the stress response. Here, we isolated an SK3-type DHN gene CaDHN2 from peppers. CaDHN2 was located in the nucleus, cytoplasm, and cell membrane. In CaDHN2-silenced peppers, which are generated by virus-induced gene silencing (VIGS), the survival rate is much lower, the electrolytic leakage is higher, and the accumulation of reactive oxygen species (ROS) is greater when compared with the control under drought stress. Moreover, when CaDHN2 (CaDHN2-OE) is overexpressed in Arabidopsis, theoverexpressing plants show enhanced drought tolerance, increased antioxidant enzyme activities, and lower ROS content. Based on yeast two-hybrid (Y2H), GST-pull down, and bimolecular fluorescence complementation (BiFC) results, we found that CaDHN2 interacts with CaGGP1, the key enzyme in ascorbic acid (AsA) synthesis, in the cytoplasm. Accordingly, the level of ascorbic acid is highly reduced in CaDHN2-silenced peppers, indicating that CaDHN2 interacts with CaGGP1 to affect the synthesis of ascorbic acid under drought stress, thus improving the drought tolerance of peppers. Our research provides a basis for further study of the function of DHN genes.
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Affiliation(s)
- Xin Li
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan 056038, China; (X.L.); (S.L.); (J.C.); (J.L.)
| | - Hao Feng
- Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Institute of Biotechnology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; (H.F.); (M.S.); (J.Z.)
| | - Sha Liu
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan 056038, China; (X.L.); (S.L.); (J.C.); (J.L.)
| | - Junjun Cui
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan 056038, China; (X.L.); (S.L.); (J.C.); (J.L.)
| | - Jiannan Liu
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan 056038, China; (X.L.); (S.L.); (J.C.); (J.L.)
| | - Mingyu Shi
- Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Institute of Biotechnology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; (H.F.); (M.S.); (J.Z.)
| | - Jielong Zhao
- Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Institute of Biotechnology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; (H.F.); (M.S.); (J.Z.)
| | - Lihu Wang
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan 056038, China; (X.L.); (S.L.); (J.C.); (J.L.)
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Tu W, Zheng C, Zheng Y, Feng Z, Lin H, Jiang Y, Chen W, Chen Y, Lee Y, Su J, Zheng W. The investigation of interaction and chaperon-like activity of α-synuclein as a protein in pathophysiology of Parkinson's disease upon direct interaction with tectorigenin. Int J Biol Macromol 2023; 249:125702. [PMID: 37414324 DOI: 10.1016/j.ijbiomac.2023.125702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 07/02/2023] [Accepted: 07/03/2023] [Indexed: 07/08/2023]
Abstract
Analyzing the therapeutic potential of a therapeutic biomolecule requires an understanding of how it may interact with proteins and modify their corresponding functions. α-Synuclein is a protein which is widely involved in the pathogenesis of Parkinson's disease (PD) and shows chaperon-like activity. We have selected tectorigenin, a most common methoxyisoflavone extracted from plants, among therapeutic bioactive molecules that are documented to have different therapeutic effects. Herein, we aimed to explore how tectorigenin interacts with α-synuclein in vitro by mimicking the physiological environment. Spectroscopic as well as theoretical studies including molecular docking simulation, were used to examine the effects of tectorigenin on the conformation and dynamics of α-synuclein. It was shown that tectorigenin is able to quench the protein emission spectra relied on a mixed static-dynamic quenching mechanism. Furthermore, it was displayed that tectorigenin binding to α-synuclein leads to microenvironmental changes in the tertiary structure of protein, however the protein's secondary structure was almost unchanged. It was also deduced that tectorigenin results in thermal stability of α-synuclein structure, evidenced by less perturbation of α-synuclein secondary structure following elevation of temperature in the presence of tectorigenin relative to that of free form. Molecular docking simulation demonstrated that non-covalent reactions, mainly hydrogen bonds, had a key role in the interaction and stabilization of α-synuclein in the presence of tectorigenin. Moreover, chaperon-like activity of α-synuclein was improved in the presence of tectorigenin against two model proteins, βL-crystallin and catalase. The findings showed that tectorigenin can lead to stabilization of α-synuclein, which may be used as a therapeutic agent in prevention of neurodegenerative diseases.
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Affiliation(s)
- Wenzhan Tu
- Rehabilitation Medicine Center, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Cheng Zheng
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou 325027, China
| | - Yuyin Zheng
- Rehabilitation Medicine Center, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Zhenhua Feng
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou 325027, China
| | - Haiyan Lin
- Rehabilitation Medicine Center, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Yiwei Jiang
- Alberta Institute, Wenzhou Medical University, Wenzhou 325000, China
| | - WangChao Chen
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou 325027, China
| | - Yuhan Chen
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou 325027, China
| | - Yang Lee
- Second affiliation of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Jianzhong Su
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou 325027, China.
| | - Wu Zheng
- Rehabilitation Medicine Center, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China; Integrative & Optimized Medicine Research Center, China-USA Institute for Acupuncture and Rehabilitation, Wenzhou Medical University, Wenzhou, Zhejiang 325027, China.
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Bagree G, Srivastava T, Mahasivam S, Sinha M, Bansal V, Ramanathan R, Priya S, Sharma SK. Differential interactions of α-synuclein conformers affect refolding and activity of proteins. J Biochem 2023; 173:107-114. [PMID: 36368019 DOI: 10.1093/jb/mvac095] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 10/13/2022] [Accepted: 11/09/2022] [Indexed: 11/13/2022] Open
Abstract
The accumulation of protein aggregates as intracellular inclusions interferes with cellular protein homeostasis leading to protein aggregation diseases. Protein aggregation results in the formation of several protein conformers including oligomers and fibrils, where each conformer has its own structural characteristic and proteotoxic potential. The present study explores the effect of alpha-synuclein (α-syn) conformers on the activity and spontaneous refolding of firefly luciferase. Of the different conformers, α-syn monomers delayed the inactivation of luciferase under thermal stress conditions and enhanced the spontaneous refolding of luciferase. In contrast, the α-syn oligomers and fibrils adversely affected luciferase activity and refolding, where the oligomers inhibited spontaneous refolding, whereas a pronounced effect on the inactivation of native luciferase was observed in the case of fibrils. These results indicate that the oligomers and fibrils of α-syn interfere with the refolding of luciferase and promote its misfolding and aggregation. The study reveals the differential propensities of various conformers of a pathologically relevant protein in causing inactivation, structural modifications and misfolding of other proteins, consequently resulting in altered protein homeostasis.
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Affiliation(s)
- Gayatri Bagree
- Food, Drug & Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, Uttar Pradesh 226001, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
- Ian Potter NanoBioSensing Facility, NanoBiotechnology Research Laboratory (NBRL), RMIT University School of Science, GPO Box 2476, Melbourne, VIC 3001, Australia
| | - Tulika Srivastava
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
- Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, Uttar Pradesh 226001, India
| | - Sanje Mahasivam
- Ian Potter NanoBioSensing Facility, NanoBiotechnology Research Laboratory (NBRL), RMIT University School of Science, GPO Box 2476, Melbourne, VIC 3001, Australia
| | - Meetali Sinha
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
- Computational Toxicology Facility, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, Uttar Pradesh 226001, India
| | - Vipul Bansal
- Ian Potter NanoBioSensing Facility, NanoBiotechnology Research Laboratory (NBRL), RMIT University School of Science, GPO Box 2476, Melbourne, VIC 3001, Australia
| | - Rajesh Ramanathan
- Ian Potter NanoBioSensing Facility, NanoBiotechnology Research Laboratory (NBRL), RMIT University School of Science, GPO Box 2476, Melbourne, VIC 3001, Australia
| | - Smriti Priya
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
- Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, Uttar Pradesh 226001, India
| | - Sandeep K Sharma
- Food, Drug & Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, Uttar Pradesh 226001, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
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Takami Y, Wang C, Nakagami H, Yamamoto K, Nozato Y, Imaizumi Y, Nagasawa M, Takeshita H, Nakajima T, Takeda S, Takeya Y, Kaneda Y, Rakugi H. Novel pathophysiological roles of α-synuclein in age-related vascular endothelial dysfunction. FASEB J 2022; 36:e22555. [PMID: 36125010 DOI: 10.1096/fj.202101621r] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 08/21/2022] [Accepted: 09/06/2022] [Indexed: 11/11/2022]
Abstract
Although α-synuclein (SNCA) is a well-known pathological molecule involved in synucleinopathy in neurons, its physiological roles remain largely unknown. We reported that serum SNCA levels have a close inverse correlation with blood pressure and age, which indicates the involvement of SNCA in age-related endothelial dysfunction. Therefore, this study aimed to elucidate the molecular functions of SNCA in the endothelium. We confirmed that SNCA was expressed in and secreted from endothelial cells (ECs). Exogenous treatment with recombinant SNCA (rSNCA) activated the Akt-eNOS axis and increased nitric oxide production in ECs. Treatment with rSNCA also suppressed TNF-α- and palmitic acid-induced NF-κB activation, leading to the suppression of VCAM-1 upregulation and restoration of eNOS downregulation in ECs. As for endogenous SNCA expression, replicative senescence resulted in the attenuation of SNCA expression in cultured ECs, similar to the effects of physiological aging on mice aortas. The siRNA-mediated silencing of SNCA consistently resulted in senescent phenotypes, such as eNOS downregulation, increased β-gal activity, decreased Sirt1 expression, and increased p53 expression, in ECs. Ex vivo assessment of endothelial functions using aortic rings revealed impaired endothelium-dependent acetylcholine-induced relaxation in SNCA knockout (KO) mice. Furthermore, SNCA KO mice, especially those on a high-fat diet, displayed elevated blood pressure compared with wild-type mice; this could be eNOS dysfunction-dependent because of the lower difference caused by L-NAME administration. These results indicate that exogenous and endogenous SNCA in ECs might physiologically maintain vascular integrity, and age-related endothelial dysfunction might be partially ascribed to loss-of-function of SNCA in ECs.
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Affiliation(s)
- Yoichi Takami
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Cheng Wang
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hironori Nakagami
- Department of Health Development and Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Koichi Yamamoto
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yoichi Nozato
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yuki Imaizumi
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Motonori Nagasawa
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hikari Takeshita
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tsuneo Nakajima
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Shuko Takeda
- Department of Clinical Gene Therapy, Osaka University Graduate School of Medicine, Osaka, Japan.,Osaka Psychiatric Research Center, Osaka Psychiatric Medical Center, Osaka, Japan
| | - Yasushi Takeya
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yasufumi Kaneda
- Division of Gene Therapy Science, Department of Genome Biology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiromi Rakugi
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
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Al-Harthi S, Kharchenko V, Mandal P, Gourdoupis S, Jaremko Ł. Zinc ions prevent α-synuclein aggregation by enhancing chaperone function of human serum albumin. Int J Biol Macromol 2022; 222:2878-2887. [DOI: 10.1016/j.ijbiomac.2022.10.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/24/2022] [Accepted: 10/07/2022] [Indexed: 11/05/2022]
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Kasen A, Houck C, Burmeister AR, Sha Q, Brundin L, Brundin P. Upregulation of α-synuclein following immune activation: Possible trigger of Parkinson's disease. Neurobiol Dis 2022; 166:105654. [DOI: 10.1016/j.nbd.2022.105654] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 01/31/2022] [Accepted: 02/03/2022] [Indexed: 12/20/2022] Open
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Evans SR, West C, Klein-Seetharaman J. Similarity of the non-amyloid-β component and C-terminal tail of monomeric and tetrameric alpha-synuclein with 14-3-3 sigma. Comput Struct Biotechnol J 2021; 19:5348-5359. [PMID: 34667532 PMCID: PMC8495038 DOI: 10.1016/j.csbj.2021.09.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 08/28/2021] [Accepted: 09/09/2021] [Indexed: 11/20/2022] Open
Abstract
Alpha-synuclein (αSyn) is often described as a predominantly disordered protein that has a propensity to self-assemble into toxic oligomers that are found in patients with Parkinson's and Alzheimer's diseases. αSyn's chaperone behavior and tetrameric structure are proposed to be protective against toxic oligomerization. In this paper, we extended the previously proposed similarity between αSyn and 14-3-3 proteins to the α-helical tetrameric species of αSyn in detail. 14-3-3 proteins are a family of well-folded proteins with seven human isoforms, and function in signal transduction and as molecular chaperones. We investigated protein homology, using sequence alignment, amyloid, and disorder prediction, as well as three-dimensional visualization and protein-interaction networks. Our results show sequence homology and structural similarity between the aggregation-prone non-amyloid-β component (NAC) residues Val-52 to Gly-111 in αSyn and 14-3-3 sigma residues Leu-12 to Gly-78. We identified an additional region of sequence homology in the C-terminal region of αSyn (residues Ser-129 to Asp-135) and a C-terminal loop of 14-3-3 between helix αH and αI (residues Ser-209 to Asp-215). This data indicates αSyn shares conserved domain architecture with small heat shock proteins. We show predicted regions of high amyloidogenic propensity and intrinsic structural disorder in αSyn coincide with amyloidogenic and disordered predictions for 14-3-3 proteins. The homology in the NAC region aligns with residues involved in dimer- and tetramerization of the non-amyloidogenic 14-3-3 proteins. Because 14-3-3 proteins are generally not prone to misfolding, our results lend further support to the hypothesis that the NAC region is critical to the assembly of αSyn into the non-toxic tetrameric state.
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Key Words
- 14-3-3 proteins
- Alpha-synuclein
- BAD, BCL2 associated agonist of cell death gene name
- Homology
- IDP, Intrinsically disorder protein(s)
- MAPT, microtubule-associated protein tau gene name
- PPI, Protein-Protein interactions
- Prediction
- Protein structure
- SIP, shared interaction partner
- SNCA, alpha-synuclein gene name
- TH, tyrosine hydroxylase gene name
- Tetramer
- YWHAB, 14-3-3 protein beta isoform gene name
- YWHAE, 14-3-3 protein epsilon isoform gene name
- YWHAH, 14-3-3 protein eta isoform gene name
- pHSPB6, phosphorylated Heat Shock Protein beta-6
- sHSP, small heat shock protein
- αSyn, alpha-synuclein
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Affiliation(s)
- Sarah R. Evans
- Colorado School of Mines, Quantitative Biosciences and Engineering, 1012 14 St, Chemistry, Golden, CO 80401, USA
| | - Colista West
- Colorado School of Mines, Department of Chemistry, 1012 14 St, Chemistry, Golden, CO 80401, USA
| | - Judith Klein-Seetharaman
- Colorado School of Mines, Quantitative Biosciences and Engineering, 1012 14 St, Chemistry, Golden, CO 80401, USA
- Colorado School of Mines, Department of Chemistry, 1012 14 St, Chemistry, Golden, CO 80401, USA
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Neurons and Glia Interplay in α-Synucleinopathies. Int J Mol Sci 2021; 22:ijms22094994. [PMID: 34066733 PMCID: PMC8125822 DOI: 10.3390/ijms22094994] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 04/29/2021] [Accepted: 05/04/2021] [Indexed: 11/16/2022] Open
Abstract
Accumulation of the neuronal presynaptic protein alpha-synuclein within proteinaceous inclusions represents the key histophathological hallmark of a spectrum of neurodegenerative disorders, referred to by the umbrella term a-synucleinopathies. Even though alpha-synuclein is expressed predominantly in neurons, pathological aggregates of the protein are also found in the glial cells of the brain. In Parkinson's disease and dementia with Lewy bodies, alpha-synuclein accumulates mainly in neurons forming the Lewy bodies and Lewy neurites, whereas in multiple system atrophy, the protein aggregates mostly in the glial cytoplasmic inclusions within oligodendrocytes. In addition, astrogliosis and microgliosis are found in the synucleinopathy brains, whereas both astrocytes and microglia internalize alpha-synuclein and contribute to the spread of pathology. The mechanisms underlying the pathological accumulation of alpha-synuclein in glial cells that under physiological conditions express low to non-detectable levels of the protein are an area of intense research. Undoubtedly, the presence of aggregated alpha-synuclein can disrupt glial function in general and can contribute to neurodegeneration through numerous pathways. Herein, we summarize the current knowledge on the role of alpha-synuclein in both neurons and glia, highlighting the contribution of the neuron-glia connectome in the disease initiation and progression, which may represent potential therapeutic target for a-synucleinopathies.
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Ma L, Gholam Azad M, Dharmasivam M, Richardson V, Quinn RJ, Feng Y, Pountney DL, Tonissen KF, Mellick GD, Yanatori I, Richardson DR. Parkinson's disease: Alterations in iron and redox biology as a key to unlock therapeutic strategies. Redox Biol 2021; 41:101896. [PMID: 33799121 PMCID: PMC8044696 DOI: 10.1016/j.redox.2021.101896] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 12/13/2022] Open
Abstract
A plethora of studies indicate that iron metabolism is dysregulated in Parkinson's disease (PD). The literature reveals well-documented alterations consistent with established dogma, but also intriguing paradoxical observations requiring mechanistic dissection. An important fact is the iron loading in dopaminergic neurons of the substantia nigra pars compacta (SNpc), which are the cells primarily affected in PD. Assessment of these changes reveal increased expression of proteins critical for iron uptake, namely transferrin receptor 1 and the divalent metal transporter 1 (DMT1), and decreased expression of the iron exporter, ferroportin-1 (FPN1). Consistent with this is the activation of iron regulator protein (IRP) RNA-binding activity, which is an important regulator of iron homeostasis, with its activation indicating cytosolic iron deficiency. In fact, IRPs bind to iron-responsive elements (IREs) in the 3ꞌ untranslated region (UTR) of certain mRNAs to stabilize their half-life, while binding to the 5ꞌ UTR prevents translation. Iron loading of dopaminergic neurons in PD may occur through these mechanisms, leading to increased neuronal iron and iron-mediated reactive oxygen species (ROS) generation. The "gold standard" histological marker of PD, Lewy bodies, are mainly composed of α-synuclein, the expression of which is markedly increased in PD. Of note, an atypical IRE exists in the α-synuclein 5ꞌ UTR that may explain its up-regulation by increased iron. This dysregulation could be impacted by the unique autonomous pacemaking of dopaminergic neurons of the SNpc that engages L-type Ca+2 channels, which imparts a bioenergetic energy deficit and mitochondrial redox stress. This dysfunction could then drive alterations in iron trafficking that attempt to rescue energy deficits such as the increased iron uptake to provide iron for key electron transport proteins. Considering the increased iron-loading in PD brains, therapies utilizing limited iron chelation have shown success. Greater therapeutic advancements should be possible once the exact molecular pathways of iron processing are dissected.
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Affiliation(s)
- L Ma
- School of Environment and Science, Griffith University Nathan, Brisbane, Queensland, Australia; Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia
| | - M Gholam Azad
- School of Environment and Science, Griffith University Nathan, Brisbane, Queensland, Australia; Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia; Centre for Cancer Cell Biology and Drug Discovery, Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia
| | - M Dharmasivam
- School of Environment and Science, Griffith University Nathan, Brisbane, Queensland, Australia; Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia; Centre for Cancer Cell Biology and Drug Discovery, Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia
| | - V Richardson
- School of Environment and Science, Griffith University Nathan, Brisbane, Queensland, Australia; Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia; Centre for Cancer Cell Biology and Drug Discovery, Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia
| | - R J Quinn
- Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia
| | - Y Feng
- School of Environment and Science, Griffith University Nathan, Brisbane, Queensland, Australia; Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia
| | - D L Pountney
- School of Medical Science, Griffith University, Gold Coast, Queensland, Australia
| | - K F Tonissen
- School of Environment and Science, Griffith University Nathan, Brisbane, Queensland, Australia; Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia
| | - G D Mellick
- School of Environment and Science, Griffith University Nathan, Brisbane, Queensland, Australia; Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia
| | - I Yanatori
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan
| | - D R Richardson
- School of Environment and Science, Griffith University Nathan, Brisbane, Queensland, Australia; Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia; Centre for Cancer Cell Biology and Drug Discovery, Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, Australia; Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan.
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12
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Yamashita S, O Kamatari Y, Honda R, Niwa A, Tomiata H, Hara A, Kuwata K. Monomeric a-synuclein (aS) inhibits amyloidogenesis of human prion protein (hPrP) by forming a stable aS-hPrP hetero-dimer. Prion 2021; 15:37-43. [PMID: 33849375 PMCID: PMC8049198 DOI: 10.1080/19336896.2021.1910176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Intermolecular interaction between hPrP and αS was investigated using high-speed atomic force microscopy, dynamic light scattering, and nuclear magnetic resonance. We found that hPrP spontaneously gathered and naturally formed oligomers. Upon addition of monomer αS with a disordered conformation, poly-dispersive property of hPrP was lost, and hetero-dimer formation started quite coherently, and further oligomerization was not observed. Solution structure of hPrP-αS dimer was firstly characterized using hetero-nuclear NMR spectroscopy. In this hetero-dimeric complex, C-terminal helical region of hPrP was in the molten-globule like state, while specific sites including hot spot and C-terminal region of αS selectively interacted with hPrP. Thus αS may suppress amyloidogenesis of hPrP by trapping the hPrP intermediate by the formation of a stable hetero-dimer with hPrP. Abbreviations: hPrP, human prion protein of amino acid residues of 23-231; PrPC, cellular form of prion protein; PrPSc, scrapie form of prion protein, HS-AFM; high speed atomic force microscopy; αS, α-synuclein; DLS, dynamic light scattering
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Affiliation(s)
- Satoshi Yamashita
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Tokai National Higher Education and Research System, Gifu, Japan
| | - Yuji O Kamatari
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Tokai National Higher Education and Research System, Gifu, Japan.,Institute for Glyco-core Research, Tokai National Higher Education and Research System, Gifu, Japan
| | - Ryo Honda
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Tokai National Higher Education and Research System, Gifu, Japan
| | - Ayumi Niwa
- Department of Tumor Pathology, Gifu University Graduate School of Medicine, Tokai National Higher Education System, Gifu, Japan
| | - Hiroyuki Tomiata
- Department of Tumor Pathology, Gifu University Graduate School of Medicine, Tokai National Higher Education System, Gifu, Japan
| | - Akira Hara
- Department of Tumor Pathology, Gifu University Graduate School of Medicine, Tokai National Higher Education System, Gifu, Japan
| | - Kazuo Kuwata
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Tokai National Higher Education and Research System, Gifu, Japan.,Department of Gene and Development, Gifu University School of Medicine, Tokai National Higher Education and Research System, Gifu, Japan
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13
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Bhak G, Méndez-Ardoy A, Escobedo A, Salvatella X, Montenegro J. An Adhesive Peptide from the C-Terminal Domain of α-Synuclein for Single-Layer Adsorption of Nanoparticles onto Substrates. Bioconjug Chem 2020; 31:2759-2766. [PMID: 33170662 DOI: 10.1021/acs.bioconjchem.0c00544] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The two-dimensional (2D) homogeneous assembly of nanoparticle monolayer arrays onto a broad range of substrates constitutes an important challenge for chemistry, nanotechnology, and material science. α-Synuclein (αS) is an intrinsically disordered protein associated with neuronal protein complexes and has a high degree of structural plasticity and chaperone activity. The C-terminal domain of αS has been linked to the noncovalent interactions of this protein with biological targets and the activity of αS in presynaptic connections. Herein, we have systematically studied peptide fragments of the chaperone-active C-terminal sequence of αS and identified a 17-residue peptide that preserves the versatile binding nature of αS. Attachment of this short peptide to gold nanoparticles afforded colloidally stable nanoparticle suspensions that allowed the homogeneous 2D adhesion of the conjugates onto a wide variety of surfaces, including the formation of crystalline nanoparticle superlattices. The peptide sequence and the strategy reported here describe a new adhesive molecule for the controlled monolayer adhesion of metal nanoparticles and sets a stepping-stone toward the potential application of the adhesive properties of αS.
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Affiliation(s)
- Ghibom Bhak
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Alejandro Méndez-Ardoy
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Albert Escobedo
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Baldiri Reixac 10, 08028 Barcelona, Spain.,Joint BSC-IRB Research Programme in Computational Biology, Baldiri Reixac 10, 08028 Barcelona, Spain
| | - Xavier Salvatella
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Baldiri Reixac 10, 08028 Barcelona, Spain.,Joint BSC-IRB Research Programme in Computational Biology, Baldiri Reixac 10, 08028 Barcelona, Spain.,ICREA, Passeig Lluís Companys 23, 08010 Barcelona, Spain
| | - Javier Montenegro
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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14
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Yoo W, Kim B, Jeon S, Kim KK, Kim TD. Identification, characterization, and immobilization of a novel YbfF esterase from Halomonas elongata. Int J Biol Macromol 2020; 165:1139-1148. [PMID: 33031847 DOI: 10.1016/j.ijbiomac.2020.09.247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 09/28/2020] [Accepted: 09/28/2020] [Indexed: 12/19/2022]
Abstract
The YbfF esterase family, which has a bifurcated binding pocket for diverse ligands, could serve as excellent biocatalysts in industrial and biotechnological applications. Here, the identification, characterization, and immobilization of a novel YbfF esterase (YbfFHalomonas elongata) from Halomonas elongata DSM 2581 is reported. Biochemical characterization of YbfF was carried out using activity staining, chromatographic analysis, kinetic analysis, activity assay, acetic acid release, and pH-indicator-based hydrolysis. YbfFH.elongata displayed broad substrate specificity, including that for p-nitrophenyl esters, glucose pentaacetate, tert-butyl acetate, and β-lactam-containing compounds, with high efficiency. Based on a homology model of YbfFH.elongata, Trp237 in the substrate-binding pocket, a critical residue for catalytic activity and substrate specificity was identified and characterized. Furthermore, crosslinked enzyme aggregates and nanoflower formation were explored to enhance the chemical stability and recyclability of YbfFH.elongata. The present study is the first report of a YbfF esterase from extremophiles, and explains its protein stability, catalytic activity, substrate specificities and diversities, kinetics, functional residues, amyloid formation, and immobilization.
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Affiliation(s)
- Wanki Yoo
- Department of Chemistry, Graduate School of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea; Department of Precision Medicine, School of Medicine, SungKyunKwan University, Suwon 16419, Republic of Korea
| | - Booyoung Kim
- Department of Chemistry, Graduate School of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Sangeun Jeon
- Department of Chemistry, Graduate School of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Kyeong Kyu Kim
- Department of Precision Medicine, School of Medicine, SungKyunKwan University, Suwon 16419, Republic of Korea
| | - T Doohun Kim
- Department of Chemistry, Graduate School of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea.
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15
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Shirasaka M, Kuwata K, Honda R. α-Synuclein chaperone suppresses nucleation and amyloidogenesis of prion protein. Biochem Biophys Res Commun 2020; 521:259-264. [DOI: 10.1016/j.bbrc.2019.10.120] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 10/14/2019] [Indexed: 11/29/2022]
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16
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Poulson BG, Szczepski K, Lachowicz JI, Jaremko L, Emwas AH, Jaremko M. Aggregation of biologically important peptides and proteins: inhibition or acceleration depending on protein and metal ion concentrations. RSC Adv 2020; 10:215-227. [PMID: 35492549 PMCID: PMC9047971 DOI: 10.1039/c9ra09350h] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Accepted: 12/14/2019] [Indexed: 01/03/2023] Open
Abstract
The process of aggregation of proteins and peptides is dependent on the concentration of proteins, and the rate of aggregation can be altered by the presence of metal ions, but this dependence is not always a straightforward relationship. In general, aggregation does not occur under normal physiological conditions, yet it can be induced in the presence of certain metal ions. However, the extent of the influence of metal ion interactions on protein aggregation has not yet been fully comprehended. A consensus has thus been difficult to reach because the acceleration/inhibition of the aggregation of proteins in the presence of metal ions depends on several factors such as pH and the concentration of the aggregated proteins involved as well as metal concentration level of metal ions. Metal ions, like Cu2+, Zn2+, Pb2+etc. may either accelerate or inhibit aggregation simply because the experimental conditions affect the behavior of biomolecules. It is clear that understanding the relationship between metal ion concentration and protein aggregation will prove useful for future scientific applications. This review focuses on the dependence of the aggregation of selected important biomolecules (peptides and proteins) on metal ion concentrations. We review proteins that are prone to aggregation, the result of which can cause serious neurodegenerative disorders. Furthering our understanding of the relationship between metal ion concentration and protein aggregation will prove useful for future scientific applications, such as finding therapies for neurodegenerative diseases. The process of aggregation of proteins and peptides is dependent on the concentration of proteins, and the rate of aggregation can be altered by the presence of metal ions, but this dependence is not always a straightforward relationship.![]()
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Affiliation(s)
- Benjamin Gabriel Poulson
- Division of Biological and Environmental Sciences and Engineering (BESE)
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Saudi Arabia
| | - Kacper Szczepski
- Division of Biological and Environmental Sciences and Engineering (BESE)
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Saudi Arabia
| | - Joanna Izabela Lachowicz
- Department of Medical Sciences and Public Health
- University of Cagliari
- Cittadella Universitaria
- Italy
| | - Lukasz Jaremko
- Division of Biological and Environmental Sciences and Engineering (BESE)
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Saudi Arabia
| | - Abdul-Hamid Emwas
- Core Labs
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Saudi Arabia
| | - Mariusz Jaremko
- Division of Biological and Environmental Sciences and Engineering (BESE)
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Saudi Arabia
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17
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A novel enantioselective SGNH family esterase (NmSGNH1) from Neisseria meningitides: Characterization, mutational analysis, and ester synthesis. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:1438-1448. [DOI: 10.1016/j.bbalip.2019.07.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/10/2019] [Accepted: 07/13/2019] [Indexed: 11/18/2022]
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18
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Wang Y, Le LTHL, Yoo W, Lee CW, Kim KK, Lee JH, Kim TD. Characterization, immobilization, and mutagenesis of a novel cold-active acetylesterase (EaAcE) from Exiguobacterium antarcticum B7. Int J Biol Macromol 2019; 136:1042-1051. [PMID: 31229546 DOI: 10.1016/j.ijbiomac.2019.06.108] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/07/2019] [Accepted: 06/15/2019] [Indexed: 12/17/2022]
Abstract
Cold-active enzymes with distinctive properties from a psychrophilic Exiguobacterium antarcticum B7 could be excellent biocatalysts in industrial and biotechnological processes. Here, the characterization, immobilization, and site-directed mutagenesis of a novel cold-active acetylesterase (EaAcE) from E. antarcticum B7 is reported. EaAcE does not belong to any currently known lipase/esterase family, although there are some sequence similarities with family III and V members. Biochemical characterization of EaAcE was carried out using activity staining, mass spectrometry analysis, circular dichroism spectra, freeze-thaw experiments, kinetic analysis, acetic acid release assays, and enantioselectivity determination. Furthermore, immobilization of EaAcE using four different approaches was explored to enhance its thermal stability and recyclability. Based on a homology model of EaAcE, four mutations (F45A, S118A, S141A, and T216A) within the substrate-binding pocket were investigated to elucidate their roles in EaAcE catalysis and substrate specificity. This work has provided invaluable information on the properties of EaAcE, which can now be used to understand the acetylesterase enzyme family.
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Affiliation(s)
- Ying Wang
- Department of Chemistry, College of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Ly Thi Huong Luu Le
- Department of Chemistry, College of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Wanki Yoo
- Department of Chemistry, College of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea; Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Republic of Korea
| | - Chang Woo Lee
- Unit of Polar Genomics, Korea Polar Research Institute (KOPRI), Incheon 21990, Republic of Korea; Department of Polar Sciences, University of Science and Technology (UST), Incheon, Republic of Korea
| | - Kyeong Kyu Kim
- Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Republic of Korea
| | - Jun Hyuck Lee
- Unit of Polar Genomics, Korea Polar Research Institute (KOPRI), Incheon 21990, Republic of Korea; Department of Polar Sciences, University of Science and Technology (UST), Incheon, Republic of Korea
| | - T Doohun Kim
- Department of Chemistry, College of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea.
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19
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Acosta G, Race N, Herr S, Fernandez J, Tang J, Rogers E, Shi R. Acrolein-mediated alpha-synuclein pathology involvement in the early post-injury pathogenesis of mild blast-induced Parkinsonian neurodegeneration. Mol Cell Neurosci 2019; 98:140-154. [PMID: 31201929 PMCID: PMC6690849 DOI: 10.1016/j.mcn.2019.06.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 06/09/2019] [Accepted: 06/11/2019] [Indexed: 01/17/2023] Open
Abstract
Survivors of blast-induced traumatic brain injury (bTBI) have increased susceptibility to Parkinson's disease (PD), characterized by α-synuclein aggregation and the progressive degeneration of nigrostriatal dopaminergic neurons. Using an established bTBI rat model, we evaluated the changes of α-synuclein and tyrosine hydroxylase (TH), known hallmarks of PD, and acrolein, a reactive aldehyde and marker of oxidative stress, with the aim of revealing key pathways leading to PD post-bTBI. Indicated in both animal models of PD and TBI, acrolein is likely a point of pathogenic convergence. Here we show that after a single mild bTBI, acrolein is elevated up to a week, systemically in urine, and in whole brain tissue, specifically the substantia nigra and striatum. Acrolein elevation is accompanied by heightened α-synuclein oligomerization, dopaminergic dysregulation, and acrolein/α-synuclein interaction in the same brain regions. We further show that acrolein can directly modify and oligomerize α-synuclein in vitro. Taken together, our data suggests acrolein likely plays an important role in inducing PD pathology following bTBI by encouraging α-synuclein aggregation. These results are expected to advance our understanding of the long-term post-bTBI pathological changes leading to the development of PD, and suggest intervention targets to curtail such pathology.
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Affiliation(s)
- Glen Acosta
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA
| | - Nicholas Race
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA; Indiana University, School of Medicine, Indianapolis, IN, USA
| | - Seth Herr
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA; Purdue University Interdisciplinary Life Sciences Program (PULSe), Purdue University, West Lafayette, IN, USA
| | - Joseph Fernandez
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA; Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Jonathan Tang
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA; Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Edmond Rogers
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA; Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Riyi Shi
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA; Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA; Indiana University, School of Medicine, Indianapolis, IN, USA; Purdue University Interdisciplinary Life Sciences Program (PULSe), Purdue University, West Lafayette, IN, USA.
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20
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Yoo WK, Ryu BH, Kim KR, Wang Y, Le LTHL, Lee JH, Kim KK, Toth G, Ahn DR, Doohun Kim T. Modulating α-synuclein fibril formation using DNA tetrahedron nanostructures. Biochim Biophys Acta Gen Subj 2018; 1863:73-81. [PMID: 30278239 DOI: 10.1016/j.bbagen.2018.09.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 09/16/2018] [Accepted: 09/27/2018] [Indexed: 01/15/2023]
Abstract
The small presynaptic protein α-synuclein (α-syn) is involved in the etiology of Parkinson's disease owing to its abnormal misfolding. To date, little information is known on the role of DNA nanostructures in the formation of α-syn amyloid fibrils. Here, the effects of DNA tetrahedrons on the formation of α-syn amyloid fibrils were investigated using various biochemical and biophysical methods such as thioflavin T fluorescence assay, atomic force microscopy, light scattering, transmission electron microscopy, and cell-based cytotoxicity assay. It has been shown that DNA tetrahedrons decreased the level of oligomers and increased the level of amyloid fibrils, which corresponded to decreased cellular toxicity. The ability of DNA tetrahedron to facilitate the formation of α-syn amyloid fibrils demonstrated that structured nucleic acids such as DNA tetrahedrons could modulate the process of amyloid fibril formation. Our study suggests that DNA tetrahedrons could be used as an important facilitator toward amyloid fibril formation of α-synuclein, which may be of significance in finding therapeutic approaches to Parkinson's disease and related synucleinopathies.
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Affiliation(s)
- Wan Ki Yoo
- Department of Chemistry, College of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea; Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 16419, Republic of Korea
| | - Bum Han Ryu
- Department of Chemistry, College of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea; Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 16419, Republic of Korea
| | - Kyoung-Ran Kim
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Ying Wang
- Department of Chemistry, College of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Ly Thi Huong Luu Le
- Department of Chemistry, College of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Jun Hyuck Lee
- Unit of Polar Genomics, Korea Polar Research Institute (KOPRI), Incheon 21990, Republic of Korea
| | - Kyeong Kyu Kim
- Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 16419, Republic of Korea
| | - Gergely Toth
- Molecular Imaging Chemistry Laboratory, Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 0QQ, UK
| | - Dae-Ro Ahn
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.
| | - T Doohun Kim
- Department of Chemistry, College of Natural Science, Sookmyung Women's University, Seoul 04310, Republic of Korea.
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21
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Jain MK, Singh P, Roy S, Bhat R. Comparative Analysis of the Conformation, Aggregation, Interaction, and Fibril Morphologies of Human α-, β-, and γ-Synuclein Proteins. Biochemistry 2018; 57:3830-3848. [PMID: 29851342 DOI: 10.1021/acs.biochem.8b00343] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The human synuclein (syn) family is comprised of α-, β-, and γ-syn proteins. α-syn has the highest propensity for aggregation, and its aggregated forms accumulate in Lewy bodies (LB) and Lewy neurites, which are involved in Parkinson's disease (PD). β- and γ-syn are absent in LB, and their exact role is still enigmatic. β-syn does not form aggregates under physiological conditions (pH 7.4), while γ-syn is associated with neural and non-neural diseases like breast cancer. Because of their similar regional distribution in the brain, natively unfolded structure, and high degree of sequence homology, studying the effect of the environment on their conformation, interactions, fibrillation, and fibril morphologies has become important. Our studies show that high temperatures, low pH values, and high concentrations increase the rate of fibrillation of α- and γ-syn, while β-syn forms fibrils only at low pH. Fibril morphologies are strongly dependent on the immediate environment of the proteins. The high molar ratio of β-syn inhibits the fibrillation in α- and γ-syn. However, preformed seed fibrils of β- and γ-syn do not affect fibrillation of α-syn. Surface plasmon resonance data show that interactions between α- and β-syn, β- and γ-syn, and α- and γ-syn are weak to moderate in nature and can be physiologically significant in counteracting several adverse conditions in the cells that trigger their aggregation. These studies could be helpful in understanding collective human synuclein behavior in various protein environments and in the modulation of the homeostasis between β-syn and healthy versus corrupt α- and γ-syn that can potentially affect PD pathology.
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Affiliation(s)
- Manish Kumar Jain
- School of Biotechnology , Jawaharlal Nehru University , New Delhi 110 067 , India
| | - Priyanka Singh
- School of Biotechnology , Jawaharlal Nehru University , New Delhi 110 067 , India
| | - Sneha Roy
- School of Biotechnology , Jawaharlal Nehru University , New Delhi 110 067 , India
| | - Rajiv Bhat
- School of Biotechnology , Jawaharlal Nehru University , New Delhi 110 067 , India
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22
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Abstract
α-Synuclein is an abundant neuronal protein that is highly enriched in presynaptic nerve terminals. Genetics and neuropathology studies link α-synuclein to Parkinson's disease (PD) and other neurodegenerative disorders. Accumulation of misfolded oligomers and larger aggregates of α-synuclein defines multiple neurodegenerative diseases called synucleinopathies, but the mechanisms by which α-synuclein acts in neurodegeneration are unknown. Moreover, the normal cellular function of α-synuclein remains debated. In this perspective, we review the structural characteristics of α-synuclein, its developmental expression pattern, its cellular and subcellular localization, and its function in neurons. We also discuss recent progress on secretion of α-synuclein, which may contribute to its interneuronal spread in a prion-like fashion, and describe the neurotoxic effects of α-synuclein that are thought to be responsible for its role in neurodegeneration.
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Affiliation(s)
- Jacqueline Burré
- Appel Institute for Alzheimer's Disease Research, Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York 10021
| | - Manu Sharma
- Appel Institute for Alzheimer's Disease Research, Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York 10021
| | - Thomas C Südhof
- Departments of Molecular and Cellular Physiology, Stanford University Medical School, Stanford, California 94305
- Howard Hughes Medical Institute, Stanford University Medical School, Stanford, California 94305
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Gámez-Valero A, Beyer K. Alternative Splicing of Alpha- and Beta-Synuclein Genes Plays Differential Roles in Synucleinopathies. Genes (Basel) 2018; 9:genes9020063. [PMID: 29370097 PMCID: PMC5852559 DOI: 10.3390/genes9020063] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/15/2018] [Accepted: 01/17/2018] [Indexed: 11/16/2022] Open
Abstract
The synuclein family is composed of three members, two of which, α- and β-synuclein, play a major role in the development of synucleinopathies, including Parkinson’s disease (PD) as most important movement disorder, dementia with Lewy bodies (DLB) as the second most frequent cause of dementia after Alzheimer’s disease and multiple system atrophy. Whereas abnormal oligomerization and fibrillation of α-synuclein are now well recognized as initial steps in the development of synucleinopathies, β-synuclein is thought to be a natural α-synuclein anti-aggregant. α-synuclein is encoded by the SNCA gene, and β-synuclein by SNCB. Both genes are homologous and undergo complex splicing events. On one hand, in-frame splicing of coding exons gives rise to at least three shorter transcripts, and the functional properties of the corresponding protein isoforms are different. Another type of alternative splicing is the alternative inclusion of at least four initial exons in the case of SNCA, and two in the case of SNCB. Finally, different lengths of 3’ untranslated regions have been also reported for both genes. SNCB only expresses in the brain, but some of the numerous SNCA transcripts are also brain-specific. With the present article, we aim to provide a systematic review of disease related changes in the differential expression of the various SNCA and SNCB transcript variants in brain, blood, and non-neuronal tissue of synucleinopathies, but especially PD and DLB as major neurodegenerative disorders.
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Affiliation(s)
- Ana Gámez-Valero
- Department of Pathology, Germans Trias i Pujol Research Institute, Badalona, 08916 Barcelona, Spain.
| | - Katrin Beyer
- Department of Pathology, Germans Trias i Pujol Research Institute, Badalona, 08916 Barcelona, Spain.
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Kumar V, Singh D, Singh BK, Singh S, Mittra N, Jha RR, Patel DK, Singh C. Alpha-synuclein aggregation, Ubiquitin proteasome system impairment, and L-Dopa response in zinc-induced Parkinsonism: resemblance to sporadic Parkinson's disease. Mol Cell Biochem 2017; 444:149-160. [PMID: 29198021 DOI: 10.1007/s11010-017-3239-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 11/24/2017] [Indexed: 12/29/2022]
Abstract
Alpha-synuclein (α-synuclein) aggregation and impairment of the Ubiquitin proteasome system (UPS) are implicated in Parkinson's disease (PD) pathogenesis. While zinc (Zn) induces dopaminergic neurodegeneration resulting in PD phenotype, its effect on protein aggregation and UPS has not yet been deciphered. The current study investigated the role of α-synuclein aggregation and UPS in Zn-induced Parkinsonism. Additionally, levodopa (L-Dopa) response was assessed in Zn-induced Parkinsonian model to establish its closeness with idiopathic PD. Male Wistar rats were treated with zinc sulfate (Zn; 20 mg/kg; i.p.) twice weekly for 12 weeks along with respective controls. In few subsets, animals were subsequently treated with L-Dopa for 21 consecutive days following Zn exposure. A significant increase in total and free Zn content was observed in the substantia nigra of the brain of exposed groups. Zn treatment caused neurobehavioral anomalies, striatal dopamine decline, and dopaminergic neuronal cell loss accompanied with a marked increase in α-synuclein expression/aggregation and Ubiquitin-conjugated protein levels in the exposed groups. Zn exposure substantially reduced UPS-associated trypsin-like, chymotrypsin-like, and caspase-like activities along with the expression of SUG1 and β-5 subunits of UPS in the nigrostriatal tissues of exposed groups. L-Dopa treatment rescued from Zn-induced neurobehavioral deficits and restored dopamine levels towards normalcy; however, Zn-induced dopaminergic neuronal loss, reduction in tyrosine hydroxylase expression, and increase in oxidative stress were unaffected. The results suggest that Zn caused UPS impairment, resulting in α-synuclein aggregation subsequently leading to dopaminergic neurodegeneration, and that Zn-induced Parkinsonism exhibited positive L-Dopa response similar to sporadic PD.
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Affiliation(s)
- Vinod Kumar
- Developmental Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, 226 001, Uttar Pradesh, India
- Academy of Scientific and Innovative Research, CSIR-IITR Campus, Lucknow, 226 001, Uttar Pradesh, India
| | - Deepali Singh
- Developmental Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, 226 001, Uttar Pradesh, India
- Academy of Scientific and Innovative Research, CSIR-IITR Campus, Lucknow, 226 001, Uttar Pradesh, India
| | - Brajesh Kumar Singh
- Developmental Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, 226 001, Uttar Pradesh, India
| | - Shweta Singh
- Developmental Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, 226 001, Uttar Pradesh, India
| | - Namrata Mittra
- Developmental Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, 226 001, Uttar Pradesh, India
- Academy of Scientific and Innovative Research, CSIR-IITR Campus, Lucknow, 226 001, Uttar Pradesh, India
| | - Rakesh Roshan Jha
- Analytical Chemistry Laboratory, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, 226 001, Uttar Pradesh, India
| | - Devendra Kumar Patel
- Analytical Chemistry Laboratory, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, 226 001, Uttar Pradesh, India
| | - Chetna Singh
- Developmental Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, 226 001, Uttar Pradesh, India.
- Academy of Scientific and Innovative Research, CSIR-IITR Campus, Lucknow, 226 001, Uttar Pradesh, India.
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Gardner B, Dieriks BV, Cameron S, Mendis LHS, Turner C, Faull RLM, Curtis MA. Metal concentrations and distributions in the human olfactory bulb in Parkinson's disease. Sci Rep 2017; 7:10454. [PMID: 28874699 PMCID: PMC5585381 DOI: 10.1038/s41598-017-10659-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 08/14/2017] [Indexed: 01/10/2023] Open
Abstract
In Parkinson's disease (PD), the olfactory bulb is typically the first region in the body to accumulate alpha-synuclein aggregates. This pathology is linked to decreased olfactory ability, which becomes apparent before any motor symptoms occur, and may be due to a local metal imbalance. Metal concentrations were investigated in post-mortem olfactory bulbs and tracts from 17 human subjects. Iron (p < 0.05) and sodium (p < 0.01) concentrations were elevated in the PD olfactory bulb. Combining laser ablation inductively coupled plasma mass spectrometry and immunohistochemistry, iron and copper were evident at very low levels in regions of alpha-synuclein aggregation. Zinc was high in these regions, and free zinc was detected in Lewy bodies, mitochondria, and lipofuscin of cells in the anterior olfactory nucleus. Increased iron and sodium in the human PD olfactory bulb may relate to the loss of olfactory function. In contrast, colocalization of free zinc and alpha-synuclein in the anterior olfactory nucleus implicate zinc in PD pathogenesis.
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Affiliation(s)
- Bronwen Gardner
- Centre for Brain Research and Department of Anatomy with Medical Imaging, University of Auckland, Auckland, New Zealand
| | - Birger V Dieriks
- Centre for Brain Research and Department of Anatomy with Medical Imaging, University of Auckland, Auckland, New Zealand
| | - Steve Cameron
- Waikato Mass Spectrometry Facility, University of Waikato, Hamilton, New Zealand
| | - Lakshini H S Mendis
- Centre for Brain Research and Department of Anatomy with Medical Imaging, University of Auckland, Auckland, New Zealand
| | - Clinton Turner
- Centre for Brain Research and Department of Anatomy with Medical Imaging, University of Auckland, Auckland, New Zealand
- Department of Anatomical Pathology, LabPlus, Auckland City Hospital, Auckland, New Zealand
| | - Richard L M Faull
- Centre for Brain Research and Department of Anatomy with Medical Imaging, University of Auckland, Auckland, New Zealand
| | - Maurice A Curtis
- Centre for Brain Research and Department of Anatomy with Medical Imaging, University of Auckland, Auckland, New Zealand.
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DJ-1, a Parkinson's disease related protein, aggregates under denaturing conditions and co-aggregates with α-synuclein through hydrophobic interaction. Biochim Biophys Acta Gen Subj 2017; 1861:1759-1769. [DOI: 10.1016/j.bbagen.2017.03.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 03/13/2017] [Accepted: 03/16/2017] [Indexed: 12/29/2022]
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Breydo L, Redington JM, Uversky VN. Effects of Intrinsic and Extrinsic Factors on Aggregation of Physiologically Important Intrinsically Disordered Proteins. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2016; 329:145-185. [PMID: 28109327 DOI: 10.1016/bs.ircmb.2016.08.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Misfolding and aggregation of proteins and peptides play an important role in a number of diseases as well as in many physiological processes. Many of the proteins that misfold and aggregate in vivo are intrinsically disordered. Protein aggregation is a complex multistep process, and aggregates can significantly differ in morphology, structure, stability, cytotoxicity, and self-propagation ability. The aggregation process is influenced by both intrinsic (e.g., mutations and expression levels) and extrinsic (e.g., polypeptide chain truncation, macromolecular crowding, posttranslational modifications, as well as interaction with metal ions, other small molecules, lipid membranes, and chaperons) factors. This review examines the effect of a variety of these factors on aggregation of physiologically important intrinsically disordered proteins.
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Affiliation(s)
- L Breydo
- Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, United States.
| | - J M Redington
- Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - V N Uversky
- Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, United States; Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia.
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Vidal-Martínez G, Vargas-Medrano J, Gil-Tommee C, Medina D, Garza NT, Yang B, Segura-Ulate I, Dominguez SJ, Perez RG. FTY720/Fingolimod Reduces Synucleinopathy and Improves Gut Motility in A53T Mice: CONTRIBUTIONS OF PRO-BRAIN-DERIVED NEUROTROPHIC FACTOR (PRO-BDNF) AND MATURE BDNF. J Biol Chem 2016; 291:20811-21. [PMID: 27528608 PMCID: PMC5034069 DOI: 10.1074/jbc.m116.744029] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Indexed: 11/06/2022] Open
Abstract
Patients with Parkinson's disease (PD) often have aggregated α-synuclein (aSyn) in enteric nervous system (ENS) neurons, which may be associated with the development of constipation. This occurs well before the onset of classic PD motor symptoms. We previously found that aging A53T transgenic (Tg) mice closely model PD-like ENS aSyn pathology, making them appropriate for testing potential PD therapies. Here we show that Tg mice overexpressing mutant human aSyn develop ENS pathology by 4 months. We then evaluated the responses of Tg mice and their WT littermates to the Food and Drug Administration-approved drug FTY720 (fingolimod, Gilenya) or vehicle control solution from 5 months of age. Long term oral FTY720 in Tg mice reduced ENS aSyn aggregation and constipation, enhanced gut motility, and increased levels of brain-derived neurotrophic factor (BDNF) but produced no significant change in WT littermates. A role for BDNF was directly assessed in a cohort of young A53T mice given vehicle, FTY720, the Trk-B receptor inhibitor ANA-12, or FTY720 + ANA-12 from 1 to 4 months of age. ANA-12-treated Tg mice developed more gut aSyn aggregation as well as constipation, whereas FTY720-treated Tg mice had reduced aSyn aggregation and less constipation, occurring in part by increasing both pro-BDNF and mature BDNF levels. The data from young and old Tg mice revealed FTY720-associated neuroprotection and reduced aSyn pathology, suggesting that FTY720 may also benefit PD patients and others with synucleinopathy. Another finding was a loss of tyrosine hydroxylase immunoreactivity in gut neurons with aggregated aSyn, comparable with our prior findings in the CNS.
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Affiliation(s)
- Guadalupe Vidal-Martínez
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Javier Vargas-Medrano
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Carolina Gil-Tommee
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - David Medina
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Nathan T Garza
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Barbara Yang
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Ismael Segura-Ulate
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Samantha J Dominguez
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Ruth G Perez
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
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Yeo WS, Kim YJ, Kabir MH, Kang JW, Ahsan-Ul-Bari M, Kim KP. Mass spectrometric analysis of protein tyrosine nitration in aging and neurodegenerative diseases. MASS SPECTROMETRY REVIEWS 2015; 34:166-183. [PMID: 24889964 DOI: 10.1002/mas.21429] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This review highlights the significance of protein tyrosine nitration (PTN) in signal transduction pathways, the progress achieved in analytical methods, and the implication of nitration in the cellular pathophysiology of aging and age-related neurodegenerative diseases. Although mass spectrometry of nitrated peptides has become a powerful tool for the characterization of nitrated peptides, the low stoichiometry of this modification clearly necessitates the use of affinity chromatography to enrich modified peptides. Analysis of nitropeptides involves identification of endogenous, intact modification as well as chemical conversion of the nitro group to a chemically reactive amine group and further modifications that enable affinity capture and enhance detectability by altering molecular properties. In this review, we focus on the recent progress in chemical derivatization of nitropeptides for enrichment and mass analysis, and for detection and quantification using various analytical tools. PTN participates in physiological processes, such as aging and neurodegenerative diseases. Accumulation of 3-nitrotyrosine has been found to occur during the aging process; this was identified through mass spectrometry. Further, there are several studies implicating the presence of nitrated tyrosine in age-related diseases such as Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis.
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Affiliation(s)
- Woon-Seok Yeo
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul, 143-701, Republic of Korea
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Abstract
α-Synuclein is an abundant neuronal protein which localizes predominantly to presynaptic terminals, and is strongly linked genetically and pathologically to Parkinson's disease and other neurodegenerative diseases. While the accumulation of α-synuclein in the form of misfolded oligomers and large aggregates defines multiple neurodegenerative diseases called "synucleinopathies", its cellular function has remained largely unclear, and is the subject of intense investigation. In this review, I focus on the structural characteristics of α-synuclein, its cellular and subcellular localization, and discuss how this relates to its function in neurons, in particular at the neuronal synapse.
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Affiliation(s)
- Jacqueline Burré
- Appel Institute for Alzheimer’s Disease Research, Feil Family Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY, USA
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Allen Reish HE, Standaert DG. Role of α-synuclein in inducing innate and adaptive immunity in Parkinson disease. JOURNAL OF PARKINSON'S DISEASE 2015; 5:1-19. [PMID: 25588354 PMCID: PMC4405142 DOI: 10.3233/jpd-140491] [Citation(s) in RCA: 157] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Alpha-synuclein (α-syn) is central to the pathogenesis of Parkinson disease (PD). Gene duplications, triplications and point mutations in SNCA1, the gene encoding α-syn, cause autosomal dominant forms of PD. Aggregated and post-translationally modified forms of α-syn are present in Lewy bodies and Lewy neurites in both sporadic and familial PD, and recent work has emphasized the prion-like ability of aggregated α-syn to produce spreading pathology. Accumulation of abnormal forms of α-syn is a trigger for PD, but recent evidence suggests that much of the downstream neurodegeneration may result from inflammatory responses. Components of both the innate and adaptive immune systems are activated in PD, and influencing interactions between innate and adaptive immune components has been shown to modify the pathological process in animal models of PD. Understanding the relationship between α-syn and subsequent inflammation may reveal novel targets for neuroprotective interventions. In this review, we examine the role of α-syn and modified forms of this protein in the initiation of innate and adaptive immune responses.
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Affiliation(s)
- Heather E Allen Reish
- Center for Neurodegeneration and Experimental Therapeutics, Department of Neurology, University of Alabama at Birmingham, Alabama, USA
| | - David G Standaert
- Center for Neurodegeneration and Experimental Therapeutics, Department of Neurology, University of Alabama at Birmingham, Alabama, USA
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Manda KM, Yedlapudi D, Korukonda S, Bojja S, Kalivendi SV. The chaperone-like activity of α-synuclein attenuates aggregation of its alternatively spliced isoform, 112-synuclein in vitro: plausible cross-talk between isoforms in protein aggregation. PLoS One 2014; 9:e98657. [PMID: 24892822 PMCID: PMC4043908 DOI: 10.1371/journal.pone.0098657] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 05/05/2014] [Indexed: 12/29/2022] Open
Abstract
Abnormal oligomerization and aggregation of α-synuclein (α-syn/WT-syn) has been shown to be a precipitating factor in the pathophysiology of Parkinson's disease (PD). Earlier observations on the induced-alternative splicing of α-syn by Parkinsonism mimetics as well as identification of region specific abnormalities in the transcript levels of 112-synclein (112-syn) in diseased subjects underscores the role of 112-syn in the pathophysiology of PD. In the present study, we sought to identify the aggregation potential of 112-syn in the presence or absence of WT-syn to predict its plausible role in protein aggregation events. Results demonstrate that unlike WT-syn, lack of 28 aa in the C-terminus results in the loss of chaperone-like activity with a concomitant gain in vulnerability to heat-induced aggregation and time-dependent fibrillation. The effects were dose and time-dependent and a significant aggregation of 112-syn was evident at as low as 45°C following 10 min of incubation. The heat-induced aggregates were found to be ill-defined structures and weakly positive towards Thioflavin-T (ThT) staining as compared to clearly distinguishable ThT positive extended fibrils resulting upon 24 h of incubation at 37°C. Further, the chaperone-like activity of WT-syn significantly attenuated heat-induced aggregation of 112-syn in a dose and time-dependent manner. On contrary, WT-syn synergistically enhanced fibrillation of 112-syn. Overall, the present findings highlight a plausible cross-talk between isoforms of α-syn and the relative abundance of these isoforms may dictate the nature and fate of protein aggregates.
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Affiliation(s)
- Krishna Madhuri Manda
- Centre for Academy of Scientific & Innovative Research, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, Andhra Pradesh, India
- Centre for Chemical Biology, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, Andhra Pradesh, India
| | - Deepthi Yedlapudi
- Centre for Chemical Biology, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, Andhra Pradesh, India
| | - Srikanth Korukonda
- Centre for Chemical Biology, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, Andhra Pradesh, India
| | - Sreedhar Bojja
- Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, Andhra Pradesh, India
| | - Shasi V. Kalivendi
- Centre for Academy of Scientific & Innovative Research, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, Andhra Pradesh, India
- Centre for Chemical Biology, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, Andhra Pradesh, India
- * E-mail:
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Ray N, Roy S, Singha S, Chandra B, Dasgupta AK, Sarkar A. Design of heat shock-resistant surfaces to prevent protein aggregation: Enhanced chaperone activity of immobilized α-Crystallin. Bioconjug Chem 2014; 25:888-95. [PMID: 24689782 DOI: 10.1021/bc500097q] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
α-Crystallin is a multimeric protein belonging to the family of small heat shock proteins, which function as molecular chaperones by resisting heat and oxidative stress induced aggregation of other proteins. We immobilized α-Crystallin on a self-assembled monolayer on glass surface and studied its activity in terms of the prevention of aggregation of aldolase. We discovered that playing with grafted protein density led to interesting variations in the chaperone activity of immobilized α-Crystallin. This result is in accordance with the hypothesis that dynamicity of subunits plays a vital role in the functioning of α-Crystallin and might be able to throw light on the structure-activity relationship. We showed that the chaperone activity of a certain number of immobilized α-Crystallins was superior compared to a solution containing an equivalent number of the protein and 10 times the number of the protein at temperatures >60 °C. The α-Crystallin grafted surfaces retained activity on reuse. This could also lead to the design of potent heat-shock resistant surfaces that can find wide applications in storage and shipping of protein based biopharmaceuticals.
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Affiliation(s)
- Namrata Ray
- Department, of Organic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
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Fasano M, Lopiano L. α-synuclein and Parkinson’s disease: a proteomic view. Expert Rev Proteomics 2014; 5:239-48. [DOI: 10.1586/14789450.5.2.239] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Mot AI, Wedd AG, Sinclair L, Brown DR, Collins SJ, Brazier MW. Metal attenuating therapies in neurodegenerative disease. Expert Rev Neurother 2014; 11:1717-45. [DOI: 10.1586/ern.11.170] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Miranda HV, Xiang W, de Oliveira RM, Simões T, Pimentel J, Klucken J, Penque D, Outeiro TF. Heat-mediated enrichment of α-synuclein from cells and tissue for assessing post-translational modifications. J Neurochem 2013; 126:673-84. [DOI: 10.1111/jnc.12251] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 03/12/2013] [Accepted: 03/25/2013] [Indexed: 01/06/2023]
Affiliation(s)
- Hugo Vicente Miranda
- Cell and Molecular Neuroscience Unit; Instituto de Medicina Molecular; Lisboa Portugal
| | - Wei Xiang
- Institut für Biochemie (Emil-Fischer-Zentrum); Friedrich-Alexander Universität Erlangen-Nürnberg; Erlangen Germany
| | - Rita M. de Oliveira
- Cell and Molecular Neuroscience Unit; Instituto de Medicina Molecular; Lisboa Portugal
| | - Tânia Simões
- Laboratório de Proteómica; Departamento de Genética; Instituto Nacional de Saúde Dr. Ricardo Jorge; Lisboa Portugal
| | - José Pimentel
- Laboratory of Neuropathology; Department of Neurosciences; Serviço de Neurologia; CHLN EPE-Hospital de Santa Maria; Lisboa Portugal
- Neurological Clinical Research Unit; Instituto de Medicina Molecular; Lisboa Portugal
| | - Jochen Klucken
- Department of Molecular Neurology; University Hospital Erlangen; Erlangen Germany
| | - Deborah Penque
- Laboratório de Proteómica; Departamento de Genética; Instituto Nacional de Saúde Dr. Ricardo Jorge; Lisboa Portugal
| | - Tiago F. Outeiro
- Cell and Molecular Neuroscience Unit; Instituto de Medicina Molecular; Lisboa Portugal
- Instituto de Fisiologia; Faculdade de Medicina de Lisboa; Lisboa Portugal
- Department of Neurodegeneration and Restorative Research; Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB); University Medical Center Göttingen; Göttingen Germany
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Valiente-Gabioud AA, Torres-Monserrat V, Molina-Rubino L, Binolfi A, Griesinger C, Fernández CO. Structural basis behind the interaction of Zn2+ with the protein α-synuclein and the Aβ peptide: A comparative analysis. J Inorg Biochem 2012; 117:334-41. [DOI: 10.1016/j.jinorgbio.2012.06.011] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 06/22/2012] [Accepted: 06/22/2012] [Indexed: 11/25/2022]
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Lehmann S, Shephard F, Jacobson LA, Szewczyk NJ. Integrated control of protein degradation in C. elegans muscle. WORM 2012; 1:141-50. [PMID: 23457662 PMCID: PMC3583358 DOI: 10.4161/worm.20465] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 04/14/2012] [Accepted: 04/23/2012] [Indexed: 12/26/2022]
Abstract
Protein degradation is a fundamental cellular process, the genomic control of which is incompletely understood. The advent of transgene-coded reporter proteins has enabled the development of C. elegans into a model for studying this problem. The regulation of muscle protein degradation is surprisingly complex, integrating multiple signals from hypodermis, intestine, neurons and muscle itself. Within the muscle, degradation is executed by separately regulated autophagy-lysosomal, ubiquitin-proteasome and calpain-mediated systems. The signal-transduction mechanisms, in some instances, involve modules previously identified for their roles in developmental processes, repurposed in terminally differentiated muscle to regulate the activities of pre-formed proteins. Here we review the genes, and mechanisms, which appear to coordinately control protein degradation within C. elegans muscle. We also consider these mechanisms in the context of development, physiology, pathophysiology and disease models.
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Affiliation(s)
- Susann Lehmann
- Medical Research Council/Arthritis Research UK Centre for Musculoskeletal Ageing Research; University of Nottingham; Royal Derby Hospital; Derby, UK
| | - Freya Shephard
- Medical Research Council/Arthritis Research UK Centre for Musculoskeletal Ageing Research; University of Nottingham; Royal Derby Hospital; Derby, UK
| | - Lewis A. Jacobson
- Department of Biological Sciences; University of Pittsburgh; Pittsburgh, PA USA
| | - Nathaniel J. Szewczyk
- Medical Research Council/Arthritis Research UK Centre for Musculoskeletal Ageing Research; University of Nottingham; Royal Derby Hospital; Derby, UK
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Tabrez S, Jabir NR, Shakil S, Greig NH, Alam Q, Abuzenadah AM, Damanhouri GA, Kamal MA. A synopsis on the role of tyrosine hydroxylase in Parkinson's disease. CNS & NEUROLOGICAL DISORDERS DRUG TARGETS 2012; 11:395-409. [PMID: 22483313 PMCID: PMC4978221 DOI: 10.2174/187152712800792785] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2012] [Revised: 02/12/2012] [Accepted: 02/18/2012] [Indexed: 12/14/2022]
Abstract
Parkinson's disease (PD) is a common chronic progressive neurodegenerative disorder in elderly people. A consistent neurochemical abnormality in PD is degeneration of dopaminergic neurons in substantia nigra pars compacta, leading to a reduction of striatal dopamine (DA) levels. As tyrosine hydroxylase (TH) catalyses the formation of L-dihydroxyphenylalanine (L-DOPA), the rate-limiting step in the biosynthesis of DA, the disease can be considered as a TH-deficiency syndrome of the striatum. Problems related to PD usually build up when vesicular storage of DA is altered by the presence of either α-synuclein protofibrils or oxidative stress. Phosphorylation of three physiologically-regulated specific sites of N-terminal domain of TH is vital in regulating its kinetic and protein interaction. The concept of physiological significance of TH isoforms is another interesting aspect to be explored further for a comprehensive understanding of its role in PD. Thus, a logical and efficient strategy for PD treatment is based on correcting or bypassing the enzyme deficiency by the treatment with L-DOPA, DA agonists, inhibitors of DA metabolism or brain grafts with cells expressing a high level of TH. Neurotrophic factors are also attracting the attention of neuroscientists because they provide the essential neuroprotective and neurorestorative properties to the nigrostriatal DA system. PPAR-γ, a key regulator of immune responses, is likewise a promising target for the treatment of PD, which can be achieved by the use of agonists with the potential to impact the expression of pro- and anti-inflammatory cytokines at the transcriptional level in immune cells via expression of TH. Herein, we review the primary biochemical and pathological features of PD, and describe both classical and developing approaches aimed to ameliorate disease symptoms and its progression.
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Affiliation(s)
- Shams Tabrez
- King Fahd Medical Research Center, King Abdulaziz University, P. O. Box 80216, Jeddah 21589, Saudi Arabia
| | - Nasimudeen R. Jabir
- King Fahd Medical Research Center, King Abdulaziz University, P. O. Box 80216, Jeddah 21589, Saudi Arabia
| | - Shazi Shakil
- King Fahd Medical Research Center, King Abdulaziz University, P. O. Box 80216, Jeddah 21589, Saudi Arabia
| | - Nigel H. Greig
- Drug Design & Development Section, Laboratory of Neurosciences, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA
| | - Qamre Alam
- King Fahd Medical Research Center, King Abdulaziz University, P. O. Box 80216, Jeddah 21589, Saudi Arabia
| | - Adel M. Abuzenadah
- King Fahd Medical Research Center, King Abdulaziz University, P. O. Box 80216, Jeddah 21589, Saudi Arabia
| | - Ghazi A. Damanhouri
- King Fahd Medical Research Center, King Abdulaziz University, P. O. Box 80216, Jeddah 21589, Saudi Arabia
| | - Mohammad A. Kamal
- King Fahd Medical Research Center, King Abdulaziz University, P. O. Box 80216, Jeddah 21589, Saudi Arabia
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Rekas A, Ahn KJ, Kim J, Carver JA. The chaperone activity of α-synuclein: Utilizing deletion mutants to map its interaction with target proteins. Proteins 2012; 80:1316-25. [DOI: 10.1002/prot.24028] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Revised: 12/14/2011] [Accepted: 12/29/2011] [Indexed: 11/06/2022]
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Abstract
AbstractGenetic, neuropathological and biochemical evidence implicates α-synuclein, a 140 amino acid presynaptic neuronal protein, in the pathogenesis of Parkinson’s disease and other neurodegenerative disorders. The aggregated protein inclusions mainly containing aberrant α-synuclein are widely accepted as morphological hallmarks of α-synucleinopathies, but their composition and location vary between disorders along with neuronal networks affected. α-Synuclein exists physiologically in both soluble and membran-bound states, in unstructured and α-helical conformations, respectively, while posttranslational modifications due to proteostatic deficits are involved in β-pleated aggregation resulting in formation of typical inclusions. The physiological function of α-synuclein and its role linked to neurodegeneration, however, are incompletely understood. Soluble oligomeric, not fully fibrillar α-synuclein is thought to be neurotoxic, main targets might be the synapse, axons and glia. The effects of aberrant α-synuclein include alterations of calcium homeostasis, mitochondrial dysfunction, oxidative and nitric injuries, cytoskeletal effects, and neuroinflammation. Proteasomal dysfunction might be a common mechanism in the pathogenesis of neuronal degeneration in α-synucleinopathies. However, how α-synuclein induces neurodegeneration remains elusive as its physiological function. Genome wide association studies demonstrated the important role for genetic variants of the SNCA gene encoding α-synuclein in the etiology of Parkinson’s disease, possibly through effects on oxidation, mitochondria, autophagy, and lysosomal function. The neuropathology of synucleinopathies and the role of α-synuclein as a potential biomarker are briefly summarized. Although animal models provided new insights into the pathogenesis of Parkinson disease and multiple system atrophy, most of them do not adequately reproduce the cardinal features of these disorders. Emerging evidence, in addition to synergistic interactions of α-synuclein with various pathogenic proteins, suggests that prionlike induction and seeding of α-synuclein could lead to the spread of the pathology and disease progression. Intervention in the early aggregation pathway, aberrant cellular effects, or secretion of α-synuclein might be targets for neuroprotection and disease-modifying therapy.
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Breydo L, Wu JW, Uversky VN. Α-synuclein misfolding and Parkinson's disease. Biochim Biophys Acta Mol Basis Dis 2011; 1822:261-85. [PMID: 22024360 DOI: 10.1016/j.bbadis.2011.10.002] [Citation(s) in RCA: 440] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Revised: 08/26/2011] [Accepted: 10/03/2011] [Indexed: 12/21/2022]
Abstract
Substantial evidence links α-synuclein, a small highly conserved presynaptic protein with unknown function, to both familial and sporadic Parkinson's disease (PD). α-Synuclein has been identified as the major component of Lewy bodies and Lewy neurites, the characteristic proteinaceous deposits that are the hallmarks of PD. α-Synuclein is a typical intrinsically disordered protein, but can adopt a number of different conformational states depending on conditions and cofactors. These include the helical membrane-bound form, a partially-folded state that is a key intermediate in aggregation and fibrillation, various oligomeric species, and fibrillar and amorphous aggregates. The molecular basis of PD appears to be tightly coupled to the aggregation of α-synuclein and the factors that affect its conformation. This review examines the different aggregation states of α-synuclein, the molecular mechanism of its aggregation, and the influence of environmental and genetic factors on this process.
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Affiliation(s)
- Leonid Breydo
- Department of Molecular Medicine, College of Medicine, University of South Florida, Tampa, FL 33612, USA
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Elcoroaristizabal Martín X, Gómez Busto F, González Fernández MC, de Pancorbo MM. [Role of genetics in the etiology of synucleinopathies]. Rev Esp Geriatr Gerontol 2011; 46 Suppl 1:3-11. [PMID: 22152908 DOI: 10.1016/j.regg.2011.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The protein family known as synucleins is composed of α-, β- and γ-synuclein. The most widely studied is the α-synuclein protein due to its participation in essential processes of the central nervous system. Neurotoxicity of this protein is related to the presence of multiplications (duplications and triplications) and point mutations in the gene sequence of the α-synuclein gene (SNCA), differential expression of its isoforms and variations in post-transductional modifications. Neurotoxicity is also related to cytoplasmic inclusions known as Lewy bodies (LBs) and Lewy neurites (LNs), which are also present in α-synucleinopathies. In general, the β-synuclein protein, codified by the SNCB gene, acts as a regulator of processes triggered by α-synuclein and its function is altered by variations in the gene sequence, while γ-synuclein, codified by the SNCG gene, seems to play a major role in certain tumoral processes.
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Affiliation(s)
- Xabier Elcoroaristizabal Martín
- Grupo de Investigación BIOMICS, Departamento de Biología Celular A, Centro de Investigación y Estudios Avanzados Lucio Lascaray, Universidad del País Vasco UPV/EHU, Vitoria-Gasteiz, España
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Dikiy I, Eliezer D. Folding and misfolding of alpha-synuclein on membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2011; 1818:1013-8. [PMID: 21945884 DOI: 10.1016/j.bbamem.2011.09.008] [Citation(s) in RCA: 146] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 09/09/2011] [Accepted: 09/12/2011] [Indexed: 12/23/2022]
Abstract
The protein alpha-synuclein is considered to play a major role in the etiology of Parkinson's disease. Because it is found in a classic amyloid fibril form within the characteristic intra-neuronal Lewy body deposits of the disease, aggregation of the protein is thought to be of critical importance, but the context in which the protein undergoes aggregation within cells remains unknown. The normal function of synucleins is poorly understood, but appears to involve membrane interactions, and in particular reversible binding to synaptic vesicle membranes. Structural studies of different states of alpha-synuclein, in the absence and presence of membranes or membrane mimetics, have led to models of how membrane-bound forms of the protein may contribute both to functional properties of the protein, as well as to membrane-induced self-assembly and aggregation. This article reviews this area, with a focus on a particular model that has emerged in the past few years. This article is part of a Special Issue entitled: Protein Folding in Membranes.
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Affiliation(s)
- Igor Dikiy
- Department of Biochemistry and Program in Structural Biology, Weill Cornell Medical College, New York, NY 10065, USA
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46
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Breydo L, Uversky VN. Role of metal ions in aggregation of intrinsically disordered proteins in neurodegenerative diseases. Metallomics 2011; 3:1163-80. [PMID: 21869995 DOI: 10.1039/c1mt00106j] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Neurodegenerative diseases constitute a set of pathological conditions originating from the slow, irreversible, and systematic cell loss within the various regions of the brain and/or the spinal cord. Depending on the affected region, the outcomes of the neurodegeneration are very broad and diverse, ranging from the problems with movements to dementia. Some neurodegenerative diseases are associated with protein misfolding and aggregation. Many proteins that misfold in human neurodegenerative diseases are intrinsically disordered; i.e., they lack a stable tertiary and/or secondary structure under physiological conditions in vitro. These intrinsically disordered proteins (IDPs) functionally complement ordered proteins, being typically involved in regulation and signaling. There is accumulating evidence that altered metal homeostasis may be related to the progression of neurodegenerative diseases. This review examines the effects of metal ion binding on the aggregation pathways of IDPs found in neurodegenerative diseases.
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Affiliation(s)
- Leonid Breydo
- Department of Molecular Medicine, College of Medicine, University of South Florida, 12901 Bruce B. Downs Blvd, MDC07, Tampa, Florida 33612, USA.
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47
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Batelli S, Peverelli E, Rodilossi S, Forloni G, Albani D. Macroautophagy and the proteasome are differently involved in the degradation of alpha-synuclein wild type and mutated A30P in an in vitro inducible model (PC12/TetOn). Neuroscience 2011; 195:128-37. [PMID: 21906659 PMCID: PMC3188703 DOI: 10.1016/j.neuroscience.2011.08.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Revised: 08/04/2011] [Accepted: 08/14/2011] [Indexed: 12/19/2022]
Abstract
Many data suggest that alpha synuclein (α-syn) aggregation is involved in Parkinson's disease (PD) neurotoxicity and is accelerated by the pathogenetic point mutation A30P. The triplication of α-syn gene has been linked to early-onset familial PD, suggesting that the cellular dosage of α-syn is an important modulator of its toxicity. To verify this point, we developed an inducible model of α-syn expression (both wild type [WT] and mutated A30P) in rat PC12/TetOn cells. At low expression level, both α-syn(WT) and (A30P) did not aggregate, were not toxic, and displayed a protective action against oxidative stress triggered by hydrogen peroxide (H2O2). By increasing α-syn expression, its antioxidant function was no longer detectable as for the A30P form, but again no aggregation and cell death were present both for the WT and the mutated protein. To clarify why α-syn did not accumulate at high expression level, we inhibited macroautophagy by 3-methyladenine (3-MA) and the proteasome by MG132. In presence of 3-MA, α-syn(WT) accumulated, A11 anti-oligomer antibody-positive aggregates were detectable, and cell toxicity was evident, while proteasome inhibition did not increase α-syn(WT) accumulation. Macroautophagy or proteasome inhibition slightly increased α-syn(A30P) toxicity, with no detectable aggregation. This model can provide useful details about α-syn function, aggregation, and degradation pathways.
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Affiliation(s)
- S Batelli
- Department of Neuroscience, Mario Negri Institute for Pharmacological Research, Milan, Italy
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48
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Emmanouilidou E, Elenis D, Papasilekas T, Stranjalis G, Gerozissis K, Ioannou PC, Vekrellis K. Assessment of α-synuclein secretion in mouse and human brain parenchyma. PLoS One 2011; 6:e22225. [PMID: 21779395 PMCID: PMC3136497 DOI: 10.1371/journal.pone.0022225] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Accepted: 06/19/2011] [Indexed: 11/28/2022] Open
Abstract
Genetic, biochemical, and animal model studies strongly suggest a central role for α-synuclein in the pathogenesis of Parkinson's disease. α-synuclein lacks a signal peptide sequence and has thus been considered a cytosolic protein. Recent data has suggested that the protein may be released from cells via a non-classical secretory pathway and may therefore exert paracrine effects in the extracellular environment. However, proof that α-synuclein is actually secreted into the brain extracellular space in vivo has not been obtained. We developed a novel highly sensitive ELISA in conjugation with an in vivo microdialysis technique to measure α-synuclein in brain interstitial fluid. We show for the first time that α-synuclein is readily detected in the interstitial fluid of both α-synuclein transgenic mice and human patients with traumatic brain injury. Our data suggest that α-synuclein is physiologically secreted by neurons in vivo. This interstitial fluid pool of the protein may have a role in the propagation of synuclein pathology and progression of Parkinson's disease.
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Affiliation(s)
- Evangelia Emmanouilidou
- Division of Basic Neurosciences, Biomedical Research Foundation of the Academy of Athens, Athens, Greece
| | - Dimitris Elenis
- Department of Chemistry, University of Athens, Athens, Greece
| | - Themis Papasilekas
- Department of Neurosurgery, Evaggelismos General Hospital, University of Athens, Athens, Greece
| | - Georgios Stranjalis
- Department of Neurosurgery, Evaggelismos General Hospital, University of Athens, Athens, Greece
| | - Kyriaki Gerozissis
- CNRS, Center of Neurosciences, Paris-Sud, UMR 8195, Orsay, France
- University Paris-Sud, UMR 8195, Orsay, France
- INSERM, Orsay, France
| | | | - Kostas Vekrellis
- Division of Basic Neurosciences, Biomedical Research Foundation of the Academy of Athens, Athens, Greece
- * E-mail:
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Sankhala RS, Damai RS, Swamy MJ. Correlation of membrane binding and hydrophobicity to the chaperone-like activity of PDC-109, the major protein of bovine seminal plasma. PLoS One 2011; 6:e17330. [PMID: 21408153 PMCID: PMC3050878 DOI: 10.1371/journal.pone.0017330] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2010] [Accepted: 01/27/2011] [Indexed: 11/19/2022] Open
Abstract
The major protein of bovine seminal plasma, PDC-109 binds to choline phospholipids present on the sperm plasma membrane upon ejaculation and plays a crucial role in the subsequent events leading to fertilization. PDC-109 also shares significant similarities with small heat shock proteins and exhibits chaperone-like activity (CLA). Although the polydisperse nature of this protein has been shown to be important for its CLA, knowledge of other factors responsible for such an activity is scarce. Since surface exposure of hydrophobic residues is known to be an important factor which modulates the CLA of chaperone proteins, in the present study we have probed the surface hydrophobicity of PDC-109 using bisANS and ANS. Further, effect of phospholipids on the structure and chaperone-like activity of PDC-109 was studied. Presence of DMPC was found to increase the CLA of PDC-109 significantly, which could be due to the considerable exposure of hydrophobic regions on the lipid-protein recombinants, which can interact productively with the nonnative structures of target proteins, resulting in their protection. However, inclusion of DMPG instead of DMPC did not significantly alter the CLA of PDC-109, which could be due to the lower specificity of PDC-109 for DMPG as compared to DMPC. Cholesterol incorporation into DMPC membranes led to a decrease in the CLA of PDC-109-lipid recombinants, which could be attributed to reduced accessibility of hydrophobic surfaces to the substrate protein(s). These results underscore the relevance of phospholipid binding and hydrophobicity to the chaperone-like activity of PDC-109.
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Affiliation(s)
| | - Rajani S. Damai
- School of Chemistry, University of Hyderabad, Hyderabad, Andhra Pradesh, India
| | - Musti J. Swamy
- School of Chemistry, University of Hyderabad, Hyderabad, Andhra Pradesh, India
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50
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Büttner S, Delay C, Franssens V, Bammens T, Ruli D, Zaunschirm S, de Oliveira RM, Outeiro TF, Madeo F, Buée L, Galas MC, Winderickx J. Synphilin-1 enhances α-synuclein aggregation in yeast and contributes to cellular stress and cell death in a Sir2-dependent manner. PLoS One 2010; 5:e13700. [PMID: 21060871 PMCID: PMC2965147 DOI: 10.1371/journal.pone.0013700] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Accepted: 10/07/2010] [Indexed: 11/19/2022] Open
Abstract
Background Parkinson's disease is characterized by the presence of cytoplasmic inclusions, known as Lewy bodies, containing both aggregated α-synuclein and its interaction partner, synphilin-1. While synphilin-1 is known to accelerate inclusion formation by α-synuclein in mammalian cells, its effect on cytotoxicity remains elusive. Methodology/Principal Findings We expressed wild-type synphilin-1 or its R621C mutant either alone or in combination with α-synuclein in the yeast Saccharomyces cerevisiae and monitored the intracellular localization and inclusion formation of the proteins as well as the repercussions on growth, oxidative stress and cell death. We found that wild-type and mutant synphilin-1 formed inclusions and accelerated inclusion formation by α-synuclein in yeast cells, the latter being correlated to enhanced phosphorylation of serine-129. Synphilin-1 inclusions co-localized with lipid droplets and endomembranes. Consistently, we found that wild-type and mutant synphilin-1 interacts with detergent-resistant membrane domains, known as lipid rafts. The expression of synphilin-1 did not incite a marked growth defect in exponential cultures, which is likely due to the formation of aggresomes and the retrograde transport of inclusions from the daughter cells back to the mother cells. However, when the cultures approached stationary phase and during subsequent ageing of the yeast cells, both wild-type and mutant synphilin-1 reduced survival and triggered apoptotic and necrotic cell death, albeit to a different extent. Most interestingly, synphilin-1 did not trigger cytotoxicity in ageing cells lacking the sirtuin Sir2. This indicates that the expression of synphilin-1 in wild-type cells causes the deregulation of Sir2-dependent processes, such as the maintenance of the autophagic flux in response to nutrient starvation. Conclusions/Significance Our findings demonstrate that wild-type and mutant synphilin-1 are lipid raft interacting proteins that form inclusions and accelerate inclusion formation of α-synuclein when expressed in yeast. Synphilin-1 thereby induces cytotoxicity, an effect most pronounced for the wild-type protein and mediated via Sir2-dependent processes.
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Affiliation(s)
- Sabrina Büttner
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Charlotte Delay
- Functional Biology, Katholieke Universiteit Leuven, Heverlee, Belgium
- Alzheimer & Tauopathies, Inserm U837, Lille, France
- Jean-Pierre Aubert Research Centre, Université Lille Nord de France, Lille, France
- Faculté de Médecine-Pole Recherche, Université du Droit et de la Santé de Lille, Lille, France
- Centre Hospitalier Universitaire, Lille, France
| | - Vanessa Franssens
- Functional Biology, Katholieke Universiteit Leuven, Heverlee, Belgium
| | - Tine Bammens
- Functional Biology, Katholieke Universiteit Leuven, Heverlee, Belgium
| | - Doris Ruli
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Sandra Zaunschirm
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Rita Machado de Oliveira
- Cell and Molecular Neuroscience Unit, Instituto de Medicina Molecular, Lisboa, Portugal
- Instituto de Fisiologia, Universidade de Lisboa, Lisboa, Portugal
| | - Tiago Fleming Outeiro
- Cell and Molecular Neuroscience Unit, Instituto de Medicina Molecular, Lisboa, Portugal
- Instituto de Fisiologia, Universidade de Lisboa, Lisboa, Portugal
| | - Frank Madeo
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Luc Buée
- Alzheimer & Tauopathies, Inserm U837, Lille, France
- Jean-Pierre Aubert Research Centre, Université Lille Nord de France, Lille, France
- Faculté de Médecine-Pole Recherche, Université du Droit et de la Santé de Lille, Lille, France
- Centre Hospitalier Universitaire, Lille, France
| | - Marie-Christine Galas
- Alzheimer & Tauopathies, Inserm U837, Lille, France
- Jean-Pierre Aubert Research Centre, Université Lille Nord de France, Lille, France
- Faculté de Médecine-Pole Recherche, Université du Droit et de la Santé de Lille, Lille, France
- Centre Hospitalier Universitaire, Lille, France
| | - Joris Winderickx
- Functional Biology, Katholieke Universiteit Leuven, Heverlee, Belgium
- * E-mail:
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