1
|
Liu C, Tang J, Chen Y, Zhang Q, Lin J, Wu S, Han J, Liu Z, Wu C, Zhuo Y, Li Y. Intracellular Zn 2+ promotes extracellular matrix remodeling in dexamethasone-treated trabecular meshwork. Am J Physiol Cell Physiol 2024; 326:C1293-C1307. [PMID: 38525543 DOI: 10.1152/ajpcell.00725.2023] [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: 12/31/2023] [Revised: 02/26/2024] [Accepted: 03/09/2024] [Indexed: 03/26/2024]
Abstract
Given the widespread application of glucocorticoids in ophthalmology, the associated elevation of intraocular pressure (IOP) has long been a vexing concern for clinicians, yet the underlying mechanisms remain inconclusive. Much of the discussion focuses on the extracellular matrix (ECM) of trabecular meshwork (TM). It is widely agreed that glucocorticoids impact the expression of matrix metalloproteinases (MMPs), leading to ECM deposition. Since Zn2+ is vital for MMPs, we explored its role in ECM alterations induced by dexamethasone (DEX). Our study revealed that in human TM cells treated with DEX, the level of intracellular Zn2+ significantly decreased, accompanied by impaired extracellular Zn2+ uptake. This correlated with changes in several Zrt-, Irt-related proteins (ZIPs) and metallothionein. ZIP8 knockdown impaired extracellular Zn2+ uptake, but Zn2+ chelation did not affect ZIP8 expression. Resembling DEX's effects, chelation of Zn2+ decreased MMP2 expression, increased the deposition of ECM proteins, and induced structural disarray of ECM. Conversely, supplementation of exogenous Zn2+ in DEX-treated cells ameliorated these outcomes. Notably, dietary zinc supplementation in mice significantly reduced DEX-induced IOP elevation and collagen content in TM, thereby rescuing the visual function of the mice. These findings underscore zinc's pivotal role in ECM regulation, providing a novel perspective on the pathogenesis of glaucoma.NEW & NOTEWORTHY Our study explores zinc's pivotal role in mitigating extracellular matrix dysregulation in the trabecular meshwork and glucocorticoid-induced ocular hypertension. We found that in human trabecular meshwork cells treated with dexamethasone, intracellular Zn2+ significantly decreased, accompanied by impaired extracellular Zn2+ uptake. Zinc supplementation rescues visual function by modulating extracellular matrix proteins and lowering intraocular pressure, offering a direction for further exploration in glaucoma management.
Collapse
Affiliation(s)
- Canying Liu
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhouChina
| | - Jiahui Tang
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhouChina
| | - Yuze Chen
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhouChina
| | - Qi Zhang
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhouChina
| | - Jicheng Lin
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhouChina
| | - Siting Wu
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhouChina
| | - Jiaxu Han
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhouChina
| | - Zhe Liu
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhouChina
| | - Caiqing Wu
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhouChina
| | - Yehong Zhuo
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhouChina
| | - Yiqing Li
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhouChina
| |
Collapse
|
2
|
Zeng Z, Cen Y, Xiong L, Hong G, Luo Y, Luo X. Dietary Copper Intake and Risk of Parkinson's Disease: a Cross-sectional Study. Biol Trace Elem Res 2024; 202:955-964. [PMID: 37462848 PMCID: PMC10803382 DOI: 10.1007/s12011-023-03750-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 06/24/2023] [Indexed: 01/23/2024]
Abstract
Copper is an essential trace element for the human body. The epidemiological evidence for the association of dietary intake of copper with the risk of Parkinson's disease (PD) is limited. We conducted an evaluation of the cross-sectional data gathered from the National Health and Nutrition Examination Surveys spanning from 2007 to 2018, which comprised a total of 17,948 participants. To discern the distinct characteristics of the participants, we performed a univariate analysis and utilized a 1:2 ratio propensity score matching method to minimize the effects of selection bias. We employed weighted univariate as well as three multivariate logistic regression models both prior to and following matching, with the aim of examining the association between dietary copper intake and PD risk. Finally, we used the restricted cubic spline (RCS) methodology in order to investigate possible non-linear relationships. Furthermore, subgroup analysis was undertaken to elicit further understanding concerning the association between copper intake and PD. A negative correlation resulted between dietary copper intake and PD risk in both univariate and multivariate logistic regression models, prior to and following matching. Our findings demonstrate that there is a nonlinear, dose-dependent relationship between copper intake and PD, according to our RCS analysis. In subgroup analysis, copper intake was identified as an important protective factor for individuals who were non-Hispanic White, unmarried, and had completed higher education. Dietary copper intake was associated with the risk of PD. Supplementation of dietary copper may have potentially beneficial effects.
Collapse
Affiliation(s)
- Zhaohao Zeng
- Department of Neurology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518001, Guangdong, China
- The First Clinical Medical College of Jinan University, Guangzhou, 510632, Guangdong, China
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Center for Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China
| | - Yanmei Cen
- The First Clinical Medical College of Jinan University, Guangzhou, 510632, Guangdong, China
| | - Lijiao Xiong
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Center for Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China
- Department of Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518001, Guangdong, China
| | - Guo Hong
- Department of Neurology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518001, Guangdong, China
- The First Clinical Medical College of Jinan University, Guangzhou, 510632, Guangdong, China
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Center for Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China
| | - Yu Luo
- Department of Neurology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518001, Guangdong, China
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Center for Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China
| | - Xiaoguang Luo
- Department of Neurology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518001, Guangdong, China.
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Center for Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China.
| |
Collapse
|
3
|
Fan YG, Wu TY, Zhao LX, Jia RJ, Ren H, Hou WJ, Wang ZY. From zinc homeostasis to disease progression: Unveiling the neurodegenerative puzzle. Pharmacol Res 2024; 199:107039. [PMID: 38123108 DOI: 10.1016/j.phrs.2023.107039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 11/16/2023] [Accepted: 12/10/2023] [Indexed: 12/23/2023]
Abstract
Zinc is a crucial trace element in the human body, playing a role in various physiological processes such as oxidative stress, neurotransmission, protein synthesis, and DNA repair. The zinc transporters (ZnTs) family members are responsible for exporting intracellular zinc, while Zrt- and Irt-like proteins (ZIPs) are involved in importing extracellular zinc. These processes are essential for maintaining cellular zinc homeostasis. Imbalances in zinc metabolism have been linked to the development of neurodegenerative diseases. Disruptions in zinc levels can impact the survival and activity of neurons, thereby contributing to the progression of neurodegenerative diseases through mechanisms like cell apoptosis regulation, protein phase separation, ferroptosis, oxidative stress, and neuroinflammation. Therefore, conducting a systematic review of the regulatory network of zinc and investigating the relationship between zinc dysmetabolism and neurodegenerative diseases can enhance our understanding of the pathogenesis of these diseases. Additionally, it may offer new insights and approaches for the treatment of neurodegenerative diseases.
Collapse
Affiliation(s)
- Yong-Gang Fan
- Key Laboratory of Medical Cell Biology of Ministry of Education, Key Laboratory of Major Chronic Diseases of Nervous System of Liaoning Province, Health Sciences Institute of China Medical University, Shenyang 110122, China.
| | - Ting-Yao Wu
- First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, China
| | - Ling-Xiao Zhao
- Key Laboratory of Medical Cell Biology of Ministry of Education, Key Laboratory of Major Chronic Diseases of Nervous System of Liaoning Province, Health Sciences Institute of China Medical University, Shenyang 110122, China
| | - Rong-Jun Jia
- Key Laboratory of Medical Cell Biology of Ministry of Education, Key Laboratory of Major Chronic Diseases of Nervous System of Liaoning Province, Health Sciences Institute of China Medical University, Shenyang 110122, China
| | - Hang Ren
- Key Laboratory of Medical Cell Biology of Ministry of Education, Key Laboratory of Major Chronic Diseases of Nervous System of Liaoning Province, Health Sciences Institute of China Medical University, Shenyang 110122, China
| | - Wen-Jia Hou
- Key Laboratory of Medical Cell Biology of Ministry of Education, Key Laboratory of Major Chronic Diseases of Nervous System of Liaoning Province, Health Sciences Institute of China Medical University, Shenyang 110122, China
| | - Zhan-You Wang
- Key Laboratory of Medical Cell Biology of Ministry of Education, Key Laboratory of Major Chronic Diseases of Nervous System of Liaoning Province, Health Sciences Institute of China Medical University, Shenyang 110122, China.
| |
Collapse
|
4
|
Kim MS, Ra EA, Kweon SH, Seo BA, Ko HS, Oh Y, Lee G. Advanced human iPSC-based preclinical model for Parkinson's disease with optogenetic alpha-synuclein aggregation. Cell Stem Cell 2023; 30:973-986.e11. [PMID: 37339636 PMCID: PMC10829432 DOI: 10.1016/j.stem.2023.05.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 04/02/2023] [Accepted: 05/24/2023] [Indexed: 06/22/2023]
Abstract
Human induced pluripotent stem cells (hiPSCs) offer advantages for disease modeling and drug discovery. However, recreating innate cellular pathologies, particularly in late-onset neurodegenerative diseases with accumulated protein aggregates including Parkinson's disease (PD), has been challenging. To overcome this barrier, we developed an optogenetics-assisted α-synuclein (α-syn) aggregation induction system (OASIS) that rapidly induces α-syn aggregates and toxicity in PD hiPSC-midbrain dopaminergic neurons and midbrain organoids. Our OASIS-based primary compound screening with SH-SY5Y cells identified 5 candidates that were secondarily validated with OASIS PD hiPSC-midbrain dopaminergic neurons and midbrain organoids, leading us to finally select BAG956. Furthermore, BAG956 significantly reverses characteristic PD phenotypes in α-syn preformed fibril models in vitro and in vivo by promoting autophagic clearance of pathological α-syn aggregates. Following the FDA Modernization Act 2.0's emphasis on alternative non-animal testing methods, our OASIS can serve as an animal-free preclinical test model (newly termed "nonclinical test") for the synucleinopathy drug development.
Collapse
Affiliation(s)
- Min Seong Kim
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Eun A Ra
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Sin Ho Kweon
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Bo Am Seo
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Global Medical Science, Yonsei University Wonju College of Medicine, Wonju-si, Gangwon-do, Korea; Department of Convergence Medicine, Yonsei University Wonju College of Medicine, Wonju-si, Gangwon-do, Korea; Mitohormesis Research Center, Yonsei University Wonju College of Medicine, Wonju-si, Gangwon-do, Korea
| | - Han Seok Ko
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| | - Yohan Oh
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Biomedical Science, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, Korea; Department of Biochemistry and Molecular Biology, College of Medicine, Hanyang University, Seoul, Korea; Hanyang Institute of Bioscience and Biotechnology, Hanyang University, Seoul, Korea.
| | - Gabsang Lee
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Solomon Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| |
Collapse
|
5
|
Miyazaki I, Asanuma M. Multifunctional Metallothioneins as a Target for Neuroprotection in Parkinson's Disease. Antioxidants (Basel) 2023; 12:antiox12040894. [PMID: 37107269 PMCID: PMC10135286 DOI: 10.3390/antiox12040894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 03/27/2023] [Accepted: 04/04/2023] [Indexed: 04/29/2023] Open
Abstract
Parkinson's disease (PD) is characterized by motor symptoms based on a loss of nigrostriatal dopaminergic neurons and by non-motor symptoms which precede motor symptoms. Neurodegeneration accompanied by an accumulation of α-synuclein is thought to propagate from the enteric nervous system to the central nervous system. The pathogenesis in sporadic PD remains unknown. However, many reports indicate various etiological factors, such as oxidative stress, inflammation, α-synuclein toxicity and mitochondrial impairment, drive neurodegeneration. Exposure to heavy metals contributes to these etiopathogenesis and increases the risk of developing PD. Metallothioneins (MTs) are cysteine-rich metal-binding proteins; MTs chelate metals and inhibit metal-induced oxidative stress, inflammation and mitochondrial dysfunction. In addition, MTs possess antioxidative properties by scavenging free radicals and exert anti-inflammatory effects by suppression of microglial activation. Furthermore, MTs recently received attention as a potential target for attenuating metal-induced α-synuclein aggregation. In this article, we summarize MTs expression in the central and enteric nervous system, and review protective functions of MTs against etiopathogenesis in PD. We also discuss neuroprotective strategies for the prevention of central dopaminergic and enteric neurodegeneration by targeting MTs. This review highlights multifunctional MTs as a target for the development of disease-modifying drugs for PD.
Collapse
Affiliation(s)
- Ikuko Miyazaki
- Department of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Masato Asanuma
- Department of Medical Neurobiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| |
Collapse
|
6
|
Wang XL, Schnoor M, Yin LM. Metallothionein-2: An emerging target in inflammatory diseases and cancers. Pharmacol Ther 2023; 244:108374. [PMID: 36889441 DOI: 10.1016/j.pharmthera.2023.108374] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 02/28/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023]
Abstract
Metallothionein-2 (MT-2) was originally discovered as a mediator of zinc homeostasis and cadmium detoxification. However, MT-2 has recently received increased attention because altered expression of MT-2 is closely related to various diseases such as asthma and cancers. Several pharmacological strategies have been developed to inhibit or modify MT-2, revealing its potential as drug target in diseases. Therefore, a better understanding of the mechanisms of MT-2 action is warranted to improve drug development for potential clinical applications. In this review, we highlight recent advances in determining the protein structure, regulation, binding partners, and new functions of MT-2 in inflammatory diseases and cancers.
Collapse
Affiliation(s)
- Xue-Ling Wang
- Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200030, China
| | - Michael Schnoor
- Department of Molecular Biomedicine, Center for Investigation and Advanced Studies of the National Polytechnic Institute (Cinvestav-IPN), Avenida IPN 2508, 07360 Mexico City, Mexico
| | - Lei-Miao Yin
- Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200030, China.
| |
Collapse
|
7
|
Maier MC, Nankervis S, Wallace ME, Develyn T, Myers MA. Dexamethasone leads to Zn 2+ accumulation and increased unbound Zn 2+ in C2C12 muscle and 3T3-L1 adipose cells. J Cell Biochem 2023; 124:409-420. [PMID: 36716229 DOI: 10.1002/jcb.30376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 01/08/2023] [Accepted: 01/15/2023] [Indexed: 01/31/2023]
Abstract
Skeletal muscle atrophy is associated with increases in circulating glucocorticoid levels and insulin resistance. Zinc accumulates in atrophic muscle, but the relationship between atrophy, insulin resistance, and Zn2+ homeostasis remains unclear. In this study, the effect of the glucocorticoid dexamethasone (DEX) on insulin and Zn2+ homeostasis was explored. Treatment of differentiated C2C12 skeletal myotubes and 3T3-L1 adipocytes with DEX significantly increased mRNA expression of the metal-binding proteins Mt1 and 2 and altered energy storage as shown by the increased size of lipid droplets in 3T3-L1 cells. In C2C12 cells the total cellular Zn2+ was higher after DEX treatment, and in both C2C12 and 3T3-L1 adipocytes, free unbound Zn2+ was increased. Insulin treatment led to a gradual increase in free Zn2+ in C2C12 cells, and no significant change in DEX-treated cells such that concentrations were similar 10 min after insulin treatment. These data demonstrate that DEX disturbs Zn2+ homeostasis in muscle and fat cells. Further study of the molecular pathways involved to identify novel therapeutic targets for treatment of skeletal muscle atrophy is warranted.
Collapse
Affiliation(s)
- Michelle C Maier
- Health Innovation and Transformation Centre, Federation University Australia, Mt Helen, Victoria, Australia
| | - Scott Nankervis
- Biomedical Science, Institute of Innovation, Science and Sustainability, Federation University Australia, Mt Helen, Victoria, Australia
| | - Morgan E Wallace
- Biomedical Science, Institute of Innovation, Science and Sustainability, Federation University Australia, Mt Helen, Victoria, Australia
| | - Tamekha Develyn
- Fiona Elsey Cancer Research Centre, Ballarat, Victoria, Australia
| | - Mark A Myers
- Health Innovation and Transformation Centre, Federation University Australia, Mt Helen, Victoria, Australia
- Biomedical Science, Institute of Innovation, Science and Sustainability, Federation University Australia, Mt Helen, Victoria, Australia
| |
Collapse
|
8
|
Tuzlakoğlu Öztürk M, Güllülü Ö. Dimerization underlies the aggregation propensity of intrinsically disordered coiled-coil domain-containing 124. Proteins 2021; 90:218-228. [PMID: 34369007 DOI: 10.1002/prot.26210] [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: 05/15/2021] [Revised: 07/27/2021] [Accepted: 07/28/2021] [Indexed: 11/10/2022]
Abstract
Coiled-coil domain-containing 124 (CCDC124) is a recently discovered ribosome-binding protein conserved in eukaryotes. CCDC124 has regulatory functions on the mediation of reversible ribosomal hibernation and translational recovery by direct attachment to large subunit ribosomal protein uL5, 25S rRNA backbone, and tRNA-binding P/A-site major groove. Moreover, it independently mediates cell division and cellular stress response by facilitating cytokinetic abscission and disulfide stress-dependent transcriptional regulation, respectively. However, the structural characterization and intracellular physiological status of CCDC124 remain unknown. In this study, we employed advanced in silico protein modeling and characterization tools to generate a native-like tertiary structure of CCDC124 and examine the disorder, low sequence complexity, and aggregation propensities, as well as high-order dimeric/oligomeric states. Subsequently, dimerization of CCDC124 was investigated with co-immunoprecipitation (CO-IP) analysis, immunostaining, and a recent live-cell protein-protein interaction method, bimolecular fluorescence complementation (BiFC). Results revealed CCDC124 as a highly disordered protein consisting of low complexity regions at the N-terminus and an aggregation sequence (151-IAVLSV-156) located in the middle region. Molecular docking and post-docking binding free energy analyses highlighted a potential involvement of V153 residue on the generation of high-order dimeric/oligomeric structures. Co-IP, immunostaining, and BiFC analyses were used to further confirm the dimeric state of CCDC124 predominantly localized at the cytoplasm. In conclusion, our findings revealed in silico structural characterization and in vivo subcellular physiological state of CCDC124, suggesting low-complexity regions located at the N-terminus of disordered CCDC124 may regulate the formation of aggregates or high-order dimeric/oligomeric states.
Collapse
Affiliation(s)
| | - Ömer Güllülü
- Department of Radiotherapy and Oncology, University Hospital Frankfurt, Frankfurt am Main, Germany.,Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN, USA
| |
Collapse
|
9
|
Calvo JS, Mulpuri NV, Dao A, Qazi NK, Meloni G. Membrane insertion exacerbates the α-Synuclein-Cu(II) dopamine oxidase activity: Metallothionein-3 targets and silences all α-synuclein-Cu(II) complexes. Free Radic Biol Med 2020; 158:149-161. [PMID: 32712192 PMCID: PMC7484060 DOI: 10.1016/j.freeradbiomed.2020.07.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 07/03/2020] [Accepted: 07/05/2020] [Indexed: 10/23/2022]
Abstract
Copper binding to α-synuclein (α-Syn), the major component of intracellular Lewy body inclusions in substantia nigra dopaminergic neurons, potentiate its toxic redox-reactivity and plays a detrimental role in the etiology of Parkinson disease (PD). Soluble α-synuclein-Cu(II) complexes possess dopamine oxidase activity and catalyze ROS production in the presence of biological reducing agents via Cu(II)/Cu(I) redox cycling. These metal-centered redox reactivities harmfully promote the oxidation and oligomerization of α-Syn. While this chemistry has been investigated on recombinantly expressed soluble α-Syn, in vivo, α-Syn is acetylated at its N-terminus and is present in equilibrium between soluble and membrane-bound forms. This post-translational modification and membrane-binding alter the Cu(II) coordination environment and binding modes and are expected to affect the α-Syn-Cu(II) reactivity. In this work, we first investigated the reactivity of acetylated and membrane-bound complexes, and subsequently addressed whether the brain metalloprotein Zn7-metallothionein-3 (Zn7MT-3) possesses a multifaceted-role in targeting these aberrant copper interactions and consequent reactivity. Through biochemical characterization of the reactivity of the non-acetylated/N-terminally acetylated soluble or membrane-bound α-Syn-Cu(II) complexes towards dopamine, oxygen, and ascorbate, we reveal that membrane insertion dramatically exacerbates the catechol oxidase-like reactivity of α-Syn-Cu(II) as a result of a change in the Cu(II) coordination environment, thereby potentiating its toxicity. Moreover, we show that Zn7MT-3 can efficiently target all α-Syn-Cu(II) complexes through Cu(II) removal, preventing their deleterious redox activities. We demonstrate that the Cu(II) reduction by the thiolate ligands of Zn7MT-3 and the formation of Cu(I)4Zn4MT-3 featuring an unusual redox-inert Cu(I)4-thiolate cluster is the molecular mechanism responsible for the protective effect exerted by MT-3 towards α-Syn-Cu(II). This work provides the molecular basis for new therapeutic interventions to control the deleterious bioinorganic chemistry of α-Syn-Cu(II).
Collapse
Affiliation(s)
- Jenifer S Calvo
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Neha V Mulpuri
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Alex Dao
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Nabeeha K Qazi
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Gabriele Meloni
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX, 75080, USA.
| |
Collapse
|
10
|
Pretsch D, Rollinger JM, Schmid A, Genov M, Wöhrer T, Krenn L, Moloney M, Kasture A, Hummel T, Pretsch A. Prolongation of metallothionein induction combats Aß and α-synuclein toxicity in aged transgenic Caenorhabditis elegans. Sci Rep 2020; 10:11707. [PMID: 32678125 PMCID: PMC7366685 DOI: 10.1038/s41598-020-68561-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 06/22/2020] [Indexed: 12/12/2022] Open
Abstract
Neurodegenerative disorders (ND) like Alzheimer's (AD), Parkinson's (PD), Huntington's or Prion diseases share similar pathological features. They are all age dependent and are often associated with disruptions in analogous metabolic processes such as protein aggregation and oxidative stress, both of which involve metal ions like copper, manganese and iron. Bush and Tanzi proposed 2008 in the 'metal hypothesis of Alzheimer's disease' that a breakdown in metal homeostasis is the main cause of NDs, and drugs restoring metal homeostasis are promising novel therapeutic strategies. We report here that metallothionein (MT), an endogenous metal detoxifying protein, is increased in young amyloid ß (Aß) expressing Caenorhabditis elegans, whereas it is not in wild type strains. Further MT induction collapsed in 8 days old transgenic worms, indicating the age dependency of disease outbreak, and sharing intriguing parallels to diminished MT levels in human brains of AD. A medium throughput screening assay method was established to search for compounds increasing the MT level. Compounds known to induce MT release like progesterone, ZnSO4, quercetin, dexamethasone and apomorphine were active in models of AD and PD. Thioflavin T, clioquinol and emodin are promising leads in AD and PD research, whose mode of action has not been fully established yet. In this study, we could show that the reduction of Aß and α-synuclein toxicity in transgenic C. elegans models correlated with the prolongation of MT induction time and that knockdown of MT with RNA interference resulted in a loss of bioactivity.
Collapse
Affiliation(s)
- Dagmar Pretsch
- Oxford Antibiotic Group GmbH, Konrad-Lorenz-Straße 24, 3430, Tulln, Austria.
| | - Judith Maria Rollinger
- Department of Pharmacognosy, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Axel Schmid
- Department of Neuroscience and Developmental Biology, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Miroslav Genov
- Oxford Antibiotic Group GmbH, Konrad-Lorenz-Straße 24, 3430, Tulln, Austria
| | - Teresa Wöhrer
- Oxford Antibiotic Group GmbH, Konrad-Lorenz-Straße 24, 3430, Tulln, Austria
| | - Liselotte Krenn
- Department of Pharmacognosy, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Mark Moloney
- Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Ameya Kasture
- Department of Neuroscience and Developmental Biology, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Thomas Hummel
- Department of Neuroscience and Developmental Biology, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Alexander Pretsch
- Oxford Antibiotic Group GmbH, Konrad-Lorenz-Straße 24, 3430, Tulln, Austria
| |
Collapse
|
11
|
Teil M, Arotcarena ML, Faggiani E, Laferriere F, Bezard E, Dehay B. Targeting α-synuclein for PD Therapeutics: A Pursuit on All Fronts. Biomolecules 2020; 10:biom10030391. [PMID: 32138193 PMCID: PMC7175302 DOI: 10.3390/biom10030391] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 02/26/2020] [Accepted: 02/29/2020] [Indexed: 12/15/2022] Open
Abstract
Parkinson's Disease (PD) is characterized both by the loss of dopaminergic neurons in the substantia nigra and the presence of cytoplasmic inclusions called Lewy Bodies. These Lewy Bodies contain the aggregated α-synuclein (α-syn) protein, which has been shown to be able to propagate from cell to cell and throughout different regions in the brain. Due to its central role in the pathology and the lack of a curative treatment for PD, an increasing number of studies have aimed at targeting this protein for therapeutics. Here, we reviewed and discussed the many different approaches that have been studied to inhibit α-syn accumulation via direct and indirect targeting. These analyses have led to the generation of multiple clinical trials that are either completed or currently active. These clinical trials and the current preclinical studies must still face obstacles ahead, but give hope of finding a therapy for PD with time.
Collapse
Affiliation(s)
- Margaux Teil
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France; (M.T.); (M.-L.A.); (E.F.); (F.L.); (E.B.)
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - Marie-Laure Arotcarena
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France; (M.T.); (M.-L.A.); (E.F.); (F.L.); (E.B.)
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - Emilie Faggiani
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France; (M.T.); (M.-L.A.); (E.F.); (F.L.); (E.B.)
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - Florent Laferriere
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France; (M.T.); (M.-L.A.); (E.F.); (F.L.); (E.B.)
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - Erwan Bezard
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France; (M.T.); (M.-L.A.); (E.F.); (F.L.); (E.B.)
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - Benjamin Dehay
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France; (M.T.); (M.-L.A.); (E.F.); (F.L.); (E.B.)
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- Correspondence:
| |
Collapse
|
12
|
Ryan P, Xu M, Davey AK, Danon JJ, Mellick GD, Kassiou M, Rudrawar S. O-GlcNAc Modification Protects against Protein Misfolding and Aggregation in Neurodegenerative Disease. ACS Chem Neurosci 2019; 10:2209-2221. [PMID: 30985105 DOI: 10.1021/acschemneuro.9b00143] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Post-translational modifications (PTMs) of proteins are becoming the focus of intense research due to their implications in a broad spectrum of neurodegenerative diseases. Various PTMs have been identified to alter the toxic profiles of proteins which play critical roles in disease etiology. In Alzheimer's disease (AD), dysregulated phosphorylation is reported to promote pathogenic processing of the microtubule-associated tau protein. Among the PTMs, the enzymatic addition of N-acetyl-d-glucosamine (GlcNAc) residues to Ser/Thr residues is reported to deliver protective effects against the pathogenic processing of both amyloid precursor protein (APP) and tau. Modification of tau with as few as one single O-GlcNAc residue inhibits its toxic self-assembly. This modification also has the same effect on the assembly of the Parkinson's disease (PD) associated α-synuclein (ASyn) protein. In fact, O-GlcNAcylation ( O-linked GlcNAc modification) affects the processing of numerous proteins implicated in AD, PD, amyotrophic lateral sclerosis (ALS), and Huntington's disease (HD) in a similar manner. As such, manipulation of a protein's O-GlcNAcylation status has been proposed to offer therapeutic routes toward addressing multiple neurodegenerative pathologies. Here we review the various effects that O-GlcNAc modification, and its modulated expression, have on pathogenically significant proteins involved in neurodegenerative disease.
Collapse
Affiliation(s)
- Philip Ryan
- Menzies Health Institute Queensland, Griffith University, Gold Coast 4222, Australia
- School of Pharmacy and Pharmacology, Griffith University, Gold Coast, 4222, Australia
- Quality Use of Medicines Network, Griffith University, Gold Coast, 4222, Australia
| | - Mingming Xu
- Griffith Institute for Drug Discovery, Griffith University, Nathan, 4111, Australia
| | - Andrew K. Davey
- Menzies Health Institute Queensland, Griffith University, Gold Coast 4222, Australia
- School of Pharmacy and Pharmacology, Griffith University, Gold Coast, 4222, Australia
- Quality Use of Medicines Network, Griffith University, Gold Coast, 4222, Australia
| | | | - George D. Mellick
- Quality Use of Medicines Network, Griffith University, Gold Coast, 4222, Australia
| | - Michael Kassiou
- School of Chemistry, The University of Sydney, NSW 2006, Australia
| | - Santosh Rudrawar
- Menzies Health Institute Queensland, Griffith University, Gold Coast 4222, Australia
- School of Pharmacy and Pharmacology, Griffith University, Gold Coast, 4222, Australia
- Quality Use of Medicines Network, Griffith University, Gold Coast, 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Nathan, 4111, Australia
- School of Chemistry, The University of Sydney, NSW 2006, Australia
| |
Collapse
|
13
|
Switching on Endogenous Metal Binding Proteins in Parkinson's Disease. Cells 2019; 8:cells8020179. [PMID: 30791479 PMCID: PMC6406413 DOI: 10.3390/cells8020179] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 01/26/2019] [Accepted: 02/05/2019] [Indexed: 12/28/2022] Open
Abstract
The formation of cytotoxic intracellular protein aggregates is a pathological signature of multiple neurodegenerative diseases. The principle aggregating protein in Parkinson’s disease (PD) and atypical Parkinson’s diseases is α-synuclein (α-syn), which occurs in neural cytoplasmic inclusions. Several factors have been found to trigger α-syn aggregation, including raised calcium, iron, and copper. Transcriptional inducers have been explored to upregulate expression of endogenous metal-binding proteins as a potential neuroprotective strategy. The vitamin-D analogue, calcipotriol, induced increased expression of the neuronal vitamin D-dependent calcium-binding protein, calbindin-D28k, and this significantly decreased the occurrence of α-syn aggregates in cells with transiently raised intracellular free Ca, thereby increasing viability. More recently, the induction of endogenous expression of the Zn and Cu binding protein, metallothionein, by the glucocorticoid analogue, dexamethasone, gave a specific reduction in Cu-dependent α-syn aggregates. Fe accumulation has long been associated with PD. Intracellularly, Fe is regulated by interactions between the Fe storage protein ferritin and Fe transporters, such as poly(C)-binding protein 1. Analysis of the transcriptional regulation of Fe binding proteins may reveal potential inducers that could modulate Fe homoeostasis in disease. The current review highlights recent studies that suggest that transcriptional inducers may have potential as novel mechanism-based drugs against metal overload in PD.
Collapse
|
14
|
Atrián-Blasco E, Santoro A, Pountney DL, Meloni G, Hureau C, Faller P. Chemistry of mammalian metallothioneins and their interaction with amyloidogenic peptides and proteins. Chem Soc Rev 2017; 46:7683-7693. [PMID: 29114657 PMCID: PMC5728347 DOI: 10.1039/c7cs00448f] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cu and Zn ions are essential in most living beings. Their metabolism is critical for health and mis-metabolism can be lethal. In the last two decades, a large body of evidence has reported the role of copper, zinc and iron, and oxidative stress in several neurodegenerative diseases like Alzheimer's, Parkinson's, prion diseases, etc. To what extent this mis-metabolism is causative or a consequence of these diseases is still a matter of research. In this context metallothioneins (MTs) appear to play a central gate-keeper role in controlling aberrant metal-protein interactions. MTs are small proteins that can bind high amounts of Zn(ii) and Cu(i) ions in metal-cluster arrangements via their cysteine thiolates. Moreover, MTs are well known antioxidants. The present tutorial outlines the chemistry underlying the interconnection between copper(i/ii) and zinc(ii) coordination to amyloidogenic proteins and MTs, and their redox properties in generation and/or silencing reactive oxygen species (overproduced in oxidative stress) and other reactants. These studies have revealed the coordination chemistry involved in neurodegenerative diseases and the interactions between MTs and amyloidogenic protein metal-complexes (like amyloid-β, α-synuclein and prion-protein). Overall, the protective role of MTs in neurodegenerative processes is emerging, serving as a foundation for exploring MT chemistry as inspiration for therapeutic approaches.
Collapse
Affiliation(s)
- Elena Atrián-Blasco
- LCC (Laboratoire de Chimie de Coordination), CNRS UPR 8241, 205 route de Narbonne, 31062 Toulouse Cedex 09 (France)
- Université de Toulouse ; UPS, INPT, 31077 Toulouse (France)
| | - Alice Santoro
- Biometals and Biology Chemistry, Institut de Chimie (CNRS UMR7177), Université de Strasbourg, 4 rue B. Pascal, 67081 Strasbourg, France
| | - Dean L. Pountney
- Menzies Health Institute Queensland, Griffith University Gold Coast 4222, QLD, Australia
| | - Gabriele Meloni
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 W Campbell Road, Richardson, TX 75080-3021, USA
| | - Christelle Hureau
- LCC (Laboratoire de Chimie de Coordination), CNRS UPR 8241, 205 route de Narbonne, 31062 Toulouse Cedex 09 (France)
- Université de Toulouse ; UPS, INPT, 31077 Toulouse (France)
- University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France
| | - Peter Faller
- Biometals and Biology Chemistry, Institut de Chimie (CNRS UMR7177), Université de Strasbourg, 4 rue B. Pascal, 67081 Strasbourg, France
- University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France
| |
Collapse
|