1
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Qiang Q, Skudder-Hill L, Toyota T, Huang Z, Wei W, Adachi H. CSF 14-3-3 zeta(ζ) isoform is associated with tau pathology and cognitive decline in Alzheimer's disease. J Neurol Sci 2024; 457:122861. [PMID: 38194803 DOI: 10.1016/j.jns.2023.122861] [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: 05/12/2023] [Revised: 12/03/2023] [Accepted: 12/27/2023] [Indexed: 01/11/2024]
Abstract
14-3-3 is a family of conserved proteins that consist of seven isoforms which are highly expressed in the brain, and 14-3-3 zeta(ζ) is one of the isoforms encoded by the YWHAZ gene. Previous studies demonstrated that 14-3-3ζ is deposited in the neurofibrillary tangles of Alzheimer's disease (AD) brains, and that 14-3-3ζ interacts with tau from the purified neurofibrillary tangles of AD brain extract. The present study examined the cerebrospinal fluid (CSF) 14-3-3ζ levels of 719 participants from the Alzheimer's Disease Neuroimaging Initiative (ADNI), including cognitively normal (CN) participants, patients with mild cognitive impairment (MCI) and patients with AD dementia, and aimed to identify whether CSF 14-3-3ζ is associated with tau pathology. CSF 14-3-3ζ levels were increased in AD, and particularly elevated among tau pathology positive individuals. CSF 14-3-3ζ levels were associated with CSF phosphorylated tau 181 (p-tau) (r = 0.741, P < 0.001) and plasma p-tau (r = 0.293, P < 0.001), which are fluid biomarkers of tau pathology, and could predict tau pathology positive status with high accuracy (area under the receiver operating characteristic curve [AUC], 0.891). CSF 14-3-3ζ levels were also correlated to synaptic biomarker CSF GAP-43 (r = 0.609, P < 0.001) and neuroinflammatory biomarker CSF sTREM-2 (r = 0.507, P < 0.001). High CSF 14-3-3ζ levels at baseline were associated with progressive decline of cognitive function and neuroimaging findings during follow up. In conclusion, this study suggests that CSF 14-3-3ζ is a potential biomarker of AD that may be useful in clinical practice.
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Affiliation(s)
- Qiang Qiang
- Department of Neurology, Cognitive Disorders Center, Huadong Hospital, Fudan University, Shanghai, China; Department of Neurology, University of Occupational and Environmental Health School of Medicine, Kitakyushu, Japan
| | - Loren Skudder-Hill
- Yuquan Hospital, Tsinghua University School of Clinical Medicine, Beijing, China; School of Medicine, University of Auckland, Auckland, New Zealand
| | - Tomoko Toyota
- Department of Neurology, University of Occupational and Environmental Health School of Medicine, Kitakyushu, Japan
| | - Zhe Huang
- Department of Neurology, University of Occupational and Environmental Health School of Medicine, Kitakyushu, Japan
| | - Wenshi Wei
- Department of Neurology, Cognitive Disorders Center, Huadong Hospital, Fudan University, Shanghai, China
| | - Hiroaki Adachi
- Department of Neurology, University of Occupational and Environmental Health School of Medicine, Kitakyushu, Japan.
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2
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Herod SG, Dyatel A, Hodapp S, Jovanovic M, Berchowitz LE. Clearance of an amyloid-like translational repressor is governed by 14-3-3 proteins. Cell Rep 2022; 39:110753. [PMID: 35508136 PMCID: PMC9156962 DOI: 10.1016/j.celrep.2022.110753] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 02/24/2022] [Accepted: 04/06/2022] [Indexed: 11/13/2022] Open
Abstract
Amyloids are fibrous protein aggregates associated with age-related diseases. While these aggregates are typically described as irreversible and pathogenic, some cells use reversible amyloid-like structures that serve important functions. The RNA-binding protein Rim4 forms amyloid-like assemblies that are essential for translational control during Saccharomyces cerevisiae meiosis. Rim4 amyloid-like assemblies are disassembled in a phosphorylation-dependent manner at meiosis II onset. By investigating Rim4 clearance, we elucidate co-factors that mediate clearance of amyloid-like assemblies in a physiological setting. We demonstrate that yeast 14-3-3 proteins bind to Rim4 assemblies and facilitate their subsequent phosphorylation and timely clearance. Furthermore, distinct 14-3-3 proteins play non-redundant roles in facilitating phosphorylation and clearance of amyloid-like Rim4. Additionally, we find that 14-3-3 proteins contribute to global protein aggregate homeostasis. Based on the role of 14-3-3 proteins in aggregate homeostasis and their interactions with disease-associated assemblies, we propose that these proteins may protect against pathological protein aggregates.
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Affiliation(s)
- S Grace Herod
- Department of Genetics and Development, Hammer Health Sciences Center, Columbia University Irving Medical Center, New York, NY, USA; Taub Institute for Research on Alzheimer's and the Aging Brain, New York, NY, USA
| | - Annie Dyatel
- Department of Genetics and Development, Hammer Health Sciences Center, Columbia University Irving Medical Center, New York, NY, USA
| | - Stefanie Hodapp
- Department of Biological Sciences, Columbia University, New York, NY, USA
| | - Marko Jovanovic
- Department of Biological Sciences, Columbia University, New York, NY, USA
| | - Luke E Berchowitz
- Department of Genetics and Development, Hammer Health Sciences Center, Columbia University Irving Medical Center, New York, NY, USA; Taub Institute for Research on Alzheimer's and the Aging Brain, New York, NY, USA.
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3
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Han Y, Ye H, Li P, Zeng Y, Yang J, Gao M, Su Z, Huang Y. In vitro characterization and molecular dynamics simulation reveal mechanism of 14-3-3ζ regulated phase separation of the tau protein. Int J Biol Macromol 2022; 208:1072-1081. [PMID: 35381286 DOI: 10.1016/j.ijbiomac.2022.03.215] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/10/2022] [Accepted: 03/31/2022] [Indexed: 11/29/2022]
Abstract
As a major microtubule-associated protein, tau is involved in the assembly of microtubules in the central nervous system. However, under pathological conditions tau assembles into amyloid filaments. Liquid droplets formed by liquid-liquid phase separation (LLPS) are a recently identified assembly state of tau and may have a major effect on the physiological function of tau and the formation of tau aggregates. 14-3-3 proteins are ubiquitously expressed in various tissues and regulate a wide variety of biological processes. In this work, we demonstrate that 14-3-3ζ is recruited into tau droplets and regulates tau LLPS by in vitro assays. While the mobility of tau molecules inside the droplets is not affected in the presence of 14-3-3ζ, the amount and size of droplets can vary significantly. Mechanistic studies reveal that 14-3-3ζ regulates tau LLPS by electrostatic interactions and hydrophobic interactions with the proline-rich domain and the microtubule-binding domain of tau. Surprisingly, the disordered C-terminal tail rather than the amphipathic binding groove of 14-3-3ζ plays a key role. Our findings not only provide a novel dimension to understand the interactions between 14 and 3-3 proteins and tau, but also suggest that 14-3-3 proteins may play an important role in regulating the LLPS of their binding partners.
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Affiliation(s)
- Yue Han
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Haiqiong Ye
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Ping Li
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Yifan Zeng
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Jing Yang
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Meng Gao
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China.
| | - Zhengding Su
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Yongqi Huang
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China.
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4
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Chen F, Chen L, Liang W, Zhang Z, Li J, Zheng W, Zhu Z, Zhu J, Zhao Y. Identification and confirmation of 14-3-3 ζ as a novel target of ginsenosides in brain tissues. J Ginseng Res 2020; 45:465-472. [PMID: 34295206 PMCID: PMC8282492 DOI: 10.1016/j.jgr.2020.12.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 11/11/2020] [Accepted: 12/23/2020] [Indexed: 12/21/2022] Open
Abstract
Background Ginseng can help regulate brain excitability, promote learning and memory, and resist cerebral ischemia in the central nervous system. Ginsenosides are the major effective compounds of Ginseng, but their protein targets in the brain have not been determined. Methods We screened proteins that interact with the main components of ginseng (ginsenosides) by affinity chromatography and identified the 14-3-3 ζ protein as a potential target of ginsenosides in brain tissues. Results Biolayer interferometry (BLI) analysis showed that 20(S)-protopanaxadiol (PPD), a ginseng saponin metabolite, exhibited the highest direct interaction to the 14-3-3 ζ protein. Subsequently, BLI kinetics analysis and isothermal titration calorimetry (ITC) assay showed that PPD specifically bound to the 14-3-3 ζ protein. The cocrystal structure of the 14-3-3 ζ protein-PPD complex showed that the main interactions occurred between the residues R56, R127, and Y128 of the 14-3-3 ζ protein and a portion of PPD. Moreover, mutating any of the above residues resulted in a significant decrease of affinity between PPD and the 14-3-3 ζ protein. Conclusion Our results indicate the 14-3-3 ζ protein is the target of PPD, a ginsenoside metabolite. Crystallographic and mutagenesis studies suggest a direct interaction between PPD and the 14-3-3 ζ protein. This finding can help in the development of small-molecular compounds that bind to the 14-3-3 ζ protein on the basis of the structure of dammarane-type triterpenoid.
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Affiliation(s)
- Feiyan Chen
- Research and Innovation Center, College of Traditional Chinese Medicine Integrated Chinese and Western Medicine College, Nanjing University of Chinese Medicine, Nanjing, China.,Department of Cell Biology and Medical Genetics, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Lin Chen
- Department of Physiology, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Weifeng Liang
- Department of Cell Biology and Medical Genetics, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Zhengguang Zhang
- Department of Cell Biology and Medical Genetics, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Jiao Li
- Department of Cell Biology and Medical Genetics, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Wan Zheng
- Department of Cell Biology and Medical Genetics, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Zhu Zhu
- Department of Pharmacology, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Jiapeng Zhu
- Department of Cell Biology and Medical Genetics, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yunan Zhao
- Department of Pathology and Pathophysiology, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
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5
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Papin S, Paganetti P. Emerging Evidences for an Implication of the Neurodegeneration-Associated Protein TAU in Cancer. Brain Sci 2020; 10:brainsci10110862. [PMID: 33207722 PMCID: PMC7696480 DOI: 10.3390/brainsci10110862] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/11/2020] [Accepted: 11/12/2020] [Indexed: 12/13/2022] Open
Abstract
Neurodegenerative disorders and cancer may appear unrelated illnesses. Yet, epidemiologic studies indicate an inverse correlation between their respective incidences for specific cancers. Possibly explaining these findings, increasing evidence indicates that common molecular pathways are involved, often in opposite manner, in the pathogenesis of both disease families. Genetic mutations in the MAPT gene encoding for TAU protein cause an inherited form of frontotemporal dementia, a neurodegenerative disorder, but also increase the risk of developing cancer. Assigning TAU at the interface between cancer and neurodegenerative disorders, two major aging-linked disease families, offers a possible clue for the epidemiological observation inversely correlating these human illnesses. In addition, the expression level of TAU is recognized as a prognostic marker for cancer, as well as a modifier of cancer resistance to chemotherapy. Because of its microtubule-binding properties, TAU may interfere with the mechanism of action of taxanes, a class of chemotherapeutic drugs designed to stabilize the microtubule network and impair cell division. Indeed, a low TAU expression is associated to a better response to taxanes. Although TAU main binding partners are microtubules, TAU is able to relocate to subcellular sites devoid of microtubules and is also able to bind to cancer-linked proteins, suggesting a role of TAU in modulating microtubule-independent cellular pathways associated to oncogenesis. This concept is strengthened by experimental evidence linking TAU to P53 signaling, DNA stability and protection, processes that protect against cancer. This review aims at collecting literature data supporting the association between TAU and cancer. We will first summarize the evidence linking neurodegenerative disorders and cancer, then published data supporting a role of TAU as a modifier of the efficacy of chemotherapies and of the oncogenic process. We will finish by addressing from a mechanistic point of view the role of TAU in de-regulating critical cancer pathways, including the interaction of TAU with cancer-associated proteins.
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Affiliation(s)
- Stéphanie Papin
- Neurodegeneration Research Group, Laboratory for Biomedical Neurosciences, Neurocenter of Southern Switzerland, Ente Ospedaliero Cantonale, Via ai Söi 24, CH-6807 Torricella-Taverne, Switzerland;
| | - Paolo Paganetti
- Neurodegeneration Research Group, Laboratory for Biomedical Neurosciences, Neurocenter of Southern Switzerland, Ente Ospedaliero Cantonale, Via ai Söi 24, CH-6807 Torricella-Taverne, Switzerland;
- Faculty of Biomedical Neurosciences, Università della Svizzera Italiana, CH-6900 Lugano, Switzerland
- Correspondence: ; Tel.: +41-91-811-7250
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6
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Neves JF, Petrvalská O, Bosica F, Cantrelle FX, Merzougui H, O'Mahony G, Hanoulle X, Obšil T, Landrieu I. Phosphorylated full-length Tau interacts with 14-3-3 proteins via two short phosphorylated sequences, each occupying a binding groove of 14-3-3 dimer. FEBS J 2020; 288:1918-1934. [PMID: 32979285 DOI: 10.1111/febs.15574] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 08/07/2020] [Accepted: 09/07/2020] [Indexed: 01/22/2023]
Abstract
Protein-protein interactions (PPIs) remain poorly explored targets for the treatment of Alzheimer's disease. The interaction of 14-3-3 proteins with Tau was shown to be linked to Tau pathology. This PPI is therefore seen as a potential target for Alzheimer's disease. When Tau is phosphorylated by PKA (Tau-PKA), several phosphorylation sites are generated, including two known 14-3-3 binding sites, surrounding the phosphorylated serines 214 and 324 of Tau. The crystal structures of 14-3-3 in complex with peptides surrounding these Tau phosphosites show that both these motifs are anchored in the amphipathic binding groove of 14-3-3. However, in the absence of structural data with the full-length Tau protein, the stoichiometry of the complex or the interface and affinity of the partners is still unclear. In this work, we addressed these points, using a broad range of biophysical techniques. The interaction of the long and disordered Tau-PKA protein with 14-3-3σ is restricted to two short sequences, containing phosphorylated serines, which bind in the amphipathic binding groove of 14-3-3σ. Phosphorylation of Tau is fundamental for the formation of this stable complex, and the affinity of the Tau-PKA/14-3-3σ interaction is in the 1-10 micromolar range. Each monomer of the 14-3-3σ dimer binds one of two different phosphorylated peptides of Tau-PKA, suggesting a 14-3-3/Tau-PKA stoichiometry of 2 : 1, confirmed by analytical ultracentrifugation. These results contribute to a better understanding of this PPI and provide useful insights for drug discovery projects aiming at the modulation of this interaction.
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Affiliation(s)
- João Filipe Neves
- CNRS ERL9002 Integrative Structural Biology, Lille, France.,Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related Diseases, Univ. Lille, Lille, France
| | - Olivia Petrvalská
- Department of Structural Biology of Signaling Proteins, Division BIOCEV, Institute of Physiology of the Czech Academy of Sciences, Vestec, Czech Republic.,Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Francesco Bosica
- Medicinal Chemistry, Research and Early Development Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden.,Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, The Netherlands
| | - François-Xavier Cantrelle
- CNRS ERL9002 Integrative Structural Biology, Lille, France.,Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related Diseases, Univ. Lille, Lille, France
| | - Hamida Merzougui
- CNRS ERL9002 Integrative Structural Biology, Lille, France.,Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related Diseases, Univ. Lille, Lille, France
| | - Gavin O'Mahony
- Medicinal Chemistry, Research and Early Development Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Xavier Hanoulle
- CNRS ERL9002 Integrative Structural Biology, Lille, France.,Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related Diseases, Univ. Lille, Lille, France
| | - Tomáš Obšil
- Department of Structural Biology of Signaling Proteins, Division BIOCEV, Institute of Physiology of the Czech Academy of Sciences, Vestec, Czech Republic.,Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Isabelle Landrieu
- CNRS ERL9002 Integrative Structural Biology, Lille, France.,Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related Diseases, Univ. Lille, Lille, France
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7
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Papanikolopoulou K, Grammenoudi S, Samiotaki M, Skoulakis EMC. Differential effects of 14-3-3 dimers on Tau phosphorylation, stability and toxicity in vivo. Hum Mol Genet 2019; 27:2244-2261. [PMID: 29659825 DOI: 10.1093/hmg/ddy129] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 04/06/2018] [Indexed: 01/09/2023] Open
Abstract
Neurodegenerative dementias collectively known as Tauopathies involve aberrant phosphorylation and aggregation of the neuronal protein Tau. The largely neuronal 14-3-3 proteins are also elevated in the central nervous system (CNS) and cerebrospinal fluid of Tauopathy patients, suggesting functional linkage. We use the simplicity and genetic facility of the Drosophila system to investigate in vivo whether 14-3-3s are causal or synergistic with Tau accumulation in precipitating pathogenesis. Proteomic, biochemical and genetic evidence demonstrate that both Drosophila 14-3-3 proteins interact with human wild-type and mutant Tau on multiple sites irrespective of their phosphorylation state. 14-3-3 dimers regulate steady-state phosphorylation of both wild-type and the R406W mutant Tau, but they are not essential for toxicity of either variant. Moreover, 14-3-3 elevation itself is not pathogenic, but recruitment of dimers on accumulating wild-type Tau increases its steady-state levels ostensibly by occluding access to proteases in a phosphorylation-dependent manner. In contrast, the R406W mutant, which lacks a putative 14-3-3 binding site, responds differentially to elevation of each 14-3-3 isoform. Although excess 14-3-3ζ stabilizes the mutant protein, elevated D14-3-3ɛ has a destabilizing effect probably because of altered 14-3-3 dimer composition. Our collective data demonstrate the complexity of 14-3-3/Tau interactions in vivo and suggest that 14-3-3 attenuation is not appropriate ameliorative treatment of Tauopathies. Finally, we suggest that 'bystander' 14-3-3s are recruited by accumulating Tau with the consequences depending on the composition of available dimers within particular neurons and the Tau variant.
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Affiliation(s)
- Katerina Papanikolopoulou
- Division of Neuroscience, Biomedical Sciences Research Centre 'Alexander Fleming', Vari 16672, Greece
| | - Sofia Grammenoudi
- Division of Neuroscience, Biomedical Sciences Research Centre 'Alexander Fleming', Vari 16672, Greece
| | - Martina Samiotaki
- Proteomics Facility, Biomedical Sciences Research Centre 'Alexander Fleming', Vari 16672, Greece
| | - Efthimios M C Skoulakis
- Division of Neuroscience, Biomedical Sciences Research Centre 'Alexander Fleming', Vari 16672, Greece
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8
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Andrei SA, Meijer FA, Neves JF, Brunsveld L, Landrieu I, Ottmann C, Milroy LG. Inhibition of 14-3-3/Tau by Hybrid Small-Molecule Peptides Operating via Two Different Binding Modes. ACS Chem Neurosci 2018; 9:2639-2654. [PMID: 29722962 PMCID: PMC6256345 DOI: 10.1021/acschemneuro.8b00118] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
![]()
Current
molecular hypotheses have not yet delivered marketable
treatments for Alzheimer’s disease (AD), arguably due to a
lack of understanding of AD biology and an overreliance on conventional
drug modalities. Protein–protein interactions (PPIs) are emerging
drug targets, which show promise for the treatment of, e.g., cancer,
but are still underexploited for treating neurodegenerative diseases.
14-3-3 binding to phosphorylated Tau is a promising PPI drug target
based on its reported destabilizing effect on microtubules, leading
to enhanced neurofibrillary tangle formation as a potential cause
of AD-related neurodegeneration. Inhibition of 14-3-3/Tau may therefore
be neuroprotective. Previously, we reported the structure-guided development
of modified peptide inhibitors of 14-3-3/Tau. Here, we report further
efforts to optimize the binding mode and activity of our modified
Tau peptides through a combination of chemical synthesis, biochemical
assays, and X-ray crystallography. Most notably, we were able to characterize
two different high-affinity binding modes, both of which inhibited
14-3-3-binding to full-length PKA-phosphorylated Tau protein in vitro
as measured by NMR spectroscopy. Our findings, besides producing useful
tool inhibitor compounds for studying 14-3-3/Tau, have enhanced our
understanding of the molecular parameters for inhibiting 14-3-3/Tau,
which are important milestones toward the establishment of our 14-3-3
PPI hypothesis.
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Affiliation(s)
- Sebastian A. Andrei
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Femke A. Meijer
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | | | - Luc Brunsveld
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | | | - Christian Ottmann
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
- Department of Chemistry, University of Duisburg-Essen, Universitätsstrasse 7, 45117 Essen, Germany
| | - Lech-Gustav Milroy
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
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9
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Zhu X, Wen L, Sheng S, Wang W, Xiao Q, Qu M, Hu Y, Liu C, He K. Porcine Circovirus-Like Virus P1 Inhibits Wnt Signaling Pathway in Vivo and in Vitro. Front Microbiol 2018; 9:390. [PMID: 29593670 PMCID: PMC5857601 DOI: 10.3389/fmicb.2018.00390] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 02/20/2018] [Indexed: 11/13/2022] Open
Abstract
Porcine circovirus-like virus P1 is an important pathogen of the current pig industry, the infection mechanism is not entirely clear. Wnt signaling pathway plays an important role in the growth of young animals and infection of some viruses. This study was designed to demonstrate the effects of P1 infection on the Wnt signaling pathway. In vivo experiments, we demonstrated the down-regulatory effects of P1 infection in piglets and mice on the downstream components expression levels of Wnt signaling pathway, and the effects of Wnt signaling pathway activation on the pathogenesis of P1. In vitro studies, we found P1 infection down-regulated protein level of β-catenin and mRNA level of mmp2, prevented the β-catenin from entering into nucleus, abolished the TCF/LEF promoter activity, proved that P1 could inhibit the activation of Wnt signaling pathway in vitro. Finally, we found that VP1 of P1 virus also had the inhibitory effects on Wnt signaling pathway in vitro, elucidated the mechanism of P1’s inhibitory effects on the Wnt signaling pathway and offered the possibility that the suppression of Wnt signaling pathway was involved in the post-weaning multisystemic wasting syndrome (PMWS), laying a foundation for elucidating the pathogenesis of P1.
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Affiliation(s)
- Xuejiao Zhu
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences - Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China.,Jiangsu Key Laboratory for Food Quality and Safety - State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Libin Wen
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences - Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China.,Jiangsu Key Laboratory for Food Quality and Safety - State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Shaoyang Sheng
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences - Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
| | - Wei Wang
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences - Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China.,Jiangsu Key Laboratory for Food Quality and Safety - State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Qi Xiao
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences - Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China.,Jiangsu Key Laboratory for Food Quality and Safety - State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Meng Qu
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences - Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
| | - Yiyi Hu
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences - Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China.,Jiangsu Key Laboratory for Food Quality and Safety - State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Chuanmin Liu
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences - Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China.,Jiangsu Key Laboratory for Food Quality and Safety - State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Kongwang He
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences - Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China.,Jiangsu Key Laboratory for Food Quality and Safety - State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
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10
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Li T, Paudel HK. 14-3-3ζ Mediates Tau Aggregation in Human Neuroblastoma M17 Cells. PLoS One 2016; 11:e0160635. [PMID: 27548710 PMCID: PMC4993442 DOI: 10.1371/journal.pone.0160635] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 07/22/2016] [Indexed: 12/20/2022] Open
Abstract
Microtubule-associated protein tau is the major component of paired helical filaments (PHFs) associated with the neuropathology of Alzheimer’s disease (AD). Tau in the normal brain binds and stabilizes microtubules. Tau isolated from PHFs is hyperphosphorylated, which prevents it from binding to microtubules. Tau phosphorylation has been suggested to be involved in the development of NFT pathology in the AD brain. Recently, we showed that 14-3-3ζ is bound to tau in the PHFs and when incubated in vitro with 14-3-3ζ, tau formed amorphous aggregates, single-stranded straight filaments, double stranded ribbon-like filaments and PHF-like filaments that displayed close resemblance with corresponding ultrastructures of AD brain. Surprisingly however, phosphorylated and non-phosphorylated tau aggregated in a similar manner, indicating that tau phosphorylation does not affect in vitro tau aggregation (Qureshi et al (2013) Biochemistry 52, 6445–6455). In this study, we have examined the role of tau phosphorylation in tau aggregation in cellular level. We have found that in human M17 neuroblastoma cells, tau phosphorylation by GSK3β or PKA does not cause tau aggregation, but promotes 14-3-3ζ-induced tau aggregation by destabilizing microtubules. Microtubule disrupting drugs also promoted 14-3-3ζ-induced tau aggregation without changing tau phosphorylation in M17 cell. In vitro, when incubated with 14-3-3ζ and microtubules, nonphosphorylated tau bound to microtubules and did not aggregate. Phosphorylated tau on the other hand did not bind to microtubules and aggregated. Our data indicate that microtubule-bound tau is resistant to 14-3-3ζ-induced tau aggregation and suggest that tau phosphorylation promotes tau aggregation in the brain by detaching tau from microtubules and thus making it accessible to 14-3-3ζ.
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Affiliation(s)
- Tong Li
- The Bloomfield Center for Research in Aging, Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Canada
| | - Hemant K Paudel
- The Bloomfield Center for Research in Aging, Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Canada.,The Department of Neurology and Neurosurgery, McGill University, Montreal, Canada
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11
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Chang KH, Lin CH, Chen HC, Huang HY, Chen SL, Lin TH, Ramesh C, Huang CC, Fung HC, Wu YR, Huang HJ, Lee-Chen GJ, Hsieh-Li HM, Yao CF. The Potential of Indole/Indolylquinoline Compounds in Tau Misfolding Reduction by Enhancement of HSPB1. CNS Neurosci Ther 2016; 23:45-56. [PMID: 27424519 DOI: 10.1111/cns.12592] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 06/17/2016] [Accepted: 06/19/2016] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Neurofibrillary tangles formed from tau misfolding have long been considered one of the pathological hallmarks of Alzheimer's disease (AD). The misfolding of tau in AD correlates with the clinical progression of AD and inhibition or reversal of tau misfolding may protect the affected neurons. METHODS We generated 293 and SH-SY5Y cells expressing DsRed-tagged pro-aggregation mutant of repeat domain of tau (ΔK280 tauRD ) to test indole/indolylquinoline derivatives for reducing tau misfolding and neuroprotection. RESULTS Four of the 10 derivatives tested displayed good misfolding-inhibitory effects on Tet-On 293 cells. Among them, NC009-1 and NC009-7 enhanced heat-shock 27 kDa protein 1 (HSPB1) expression to increase ∆K280 tauRD -DsRed solubility and promoted neurite outgrowth in Tet-On SH-SY5Y cells. Knockdown of HSPB1 resulted in decreased ∆K280 tauRD -DsRed solubility and reduced neurite outgrowth, which were rescued by addition of NC009-1/NC009-7. Treatment with indole/indolylquinoline derivatives also improved neuronal cell viability and neurite outgrowth in mouse hippocampal primary culture under tau cytotoxicity. CONCLUSION Our results demonstrate how indole/indolylquinoline derivatives are likely to work in tau misfolding reduction, providing insight into the possible working mechanism of indole and indolylquinoline derivatives in AD treatment.
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Affiliation(s)
- Kuo-Hsuan Chang
- Department of Neurology, Chang Gung Memorial Hospital, Taoyuan, Taiwan.,College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Chih-Hsin Lin
- Department of Neurology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Hsuan-Chiang Chen
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Hsin-Yu Huang
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Shu-Ling Chen
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Te-Hsien Lin
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Chintakunta Ramesh
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan
| | - Chin-Chang Huang
- Department of Neurology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Hon-Chung Fung
- Department of Neurology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Yih-Ru Wu
- Department of Neurology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Hei-Jen Huang
- Department of Nursing, Mackay Junior College of Medicine, Nursing and Management, Taipei, Taiwan
| | - Guey-Jen Lee-Chen
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Hsiu Mei Hsieh-Li
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Ching-Fa Yao
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan
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12
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Kohiyama MF, Lagalwar S. Stabilization and Degradation Mechanisms of Cytoplasmic Ataxin-1. J Exp Neurosci 2016; 9:123-9. [PMID: 27168726 PMCID: PMC4859447 DOI: 10.4137/jen.s25469] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 04/11/2016] [Accepted: 04/13/2016] [Indexed: 12/24/2022] Open
Abstract
Aggregation-prone proteins in neurodegenerative disease disrupt cellular protein stabilization and degradation pathways. The neurodegenerative disease spinocerebellar ataxia type 1 (SCA1) is caused by a coding polyglutamine expansion in the Ataxin-1 gene (ATXN1), which gives rise to the aggregation-prone mutant form of ATXN1 protein. Cerebellar Purkinje neurons, preferentially vulnerable in SCA1, produce ATXN1 protein in both cytoplasmic and nuclear compartments. Cytoplasmic stabilization of ATXN1 by phosphorylation and 14-3-3-mediated mechanisms ultimately drive translocation of the protein to the nucleus where aggregation may occur. However, experimental inhibition of phosphorylation and 14-3-3 binding results in rapid degradation of ATXN1, thus preventing nuclear translocation and cellular toxicity. The exact mechanism of cytoplasmic ATXN1 degradation is currently unknown; further investigation of degradation may provide future therapeutic targets. This review examines the present understanding of cytoplasmic ATXN1 stabilization and potential degradation mechanisms during normal and pathogenic states.
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Affiliation(s)
- Mayumi F Kohiyama
- B.A., Skidmore College Neuroscience Program, Saratoga Springs, NY, USA
| | - Sarita Lagalwar
- Assistant Professor of Neuroscience, Williamson Chair in Neuroscience, Skidmore College Neuroscience Program, Saratoga Springs, NY, USA
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13
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Han J, Zhang M, Froese S, Dai FF, Robitaille M, Bhattacharjee A, Huang X, Jia W, Angers S, Wheeler MB, Wei L. The Identification of Novel Protein-Protein Interactions in Liver that Affect Glucagon Receptor Activity. PLoS One 2015; 10:e0129226. [PMID: 26075596 PMCID: PMC4468146 DOI: 10.1371/journal.pone.0129226] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 05/06/2015] [Indexed: 11/18/2022] Open
Abstract
Glucagon regulates glucose homeostasis by controlling glycogenolysis and gluconeogenesis in the liver. Exaggerated and dysregulated glucagon secretion can exacerbate hyperglycemia contributing to type 2 diabetes (T2D). Thus, it is important to understand how glucagon receptor (GCGR) activity and signaling is controlled in hepatocytes. To better understand this, we sought to identify proteins that interact with the GCGR to affect ligand-dependent receptor activation. A Flag-tagged human GCGR was recombinantly expressed in Chinese hamster ovary (CHO) cells, and GCGR complexes were isolated by affinity purification (AP). Complexes were then analyzed by mass spectrometry (MS), and protein-GCGR interactions were validated by co-immunoprecipitation (Co-IP) and Western blot. This was followed by studies in primary hepatocytes to assess the effects of each interactor on glucagon-dependent glucose production and intracellular cAMP accumulation, and then in immortalized CHO and liver cell lines to further examine cell signaling. Thirty-three unique interactors were identified from the AP-MS screening of GCGR expressing CHO cells in both glucagon liganded and unliganded states. These studies revealed a particularly robust interaction between GCGR and 5 proteins, further validated by Co-IP, Western blot and qPCR. Overexpression of selected interactors in mouse hepatocytes indicated that two interactors, LDLR and TMED2, significantly enhanced glucagon-stimulated glucose production, while YWHAB inhibited glucose production. This was mirrored with glucagon-stimulated cAMP production, with LDLR and TMED2 enhancing and YWHAB inhibiting cAMP accumulation. To further link these interactors to glucose production, key gluconeogenic genes were assessed. Both LDLR and TMED2 stimulated while YWHAB inhibited PEPCK and G6Pase gene expression. In the present study, we have probed the GCGR interactome and found three novel GCGR interactors that control glucagon-stimulated glucose production by modulating cAMP accumulation and genes that control gluconeogenesis. These interactors may be useful targets to control glucose homeostasis in T2D.
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Affiliation(s)
- Junfeng Han
- Department of Physiology and Medicine, University of Toronto, Toronto, Ontario, Canada
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
| | - Ming Zhang
- Department of Physiology and Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Sean Froese
- Department of Physiology and Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Feihan F. Dai
- Department of Physiology and Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Mélanie Robitaille
- Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, M5S1A8, Canada
| | - Alpana Bhattacharjee
- Department of Physiology and Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Xinyi Huang
- Department of Physiology and Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Weiping Jia
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
| | - Stéphane Angers
- Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, M5S1A8, Canada
| | - Michael B. Wheeler
- Department of Physiology and Medicine, University of Toronto, Toronto, Ontario, Canada
- * E-mail: (MW); (LW)
| | - Li Wei
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
- * E-mail: (MW); (LW)
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14
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Papanikolopoulou K, Skoulakis EMC. Temporally distinct phosphorylations differentiate Tau-dependent learning deficits and premature mortality in Drosophila. Hum Mol Genet 2014; 24:2065-77. [PMID: 25524708 DOI: 10.1093/hmg/ddu726] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Abnormally phosphorylated Tau protein, the major component of neurofibrillary tangles, is critical in the pathogenesis of Alzheimer's disease and related Tauopathies. We used Drosophila to examine the role of key disease-associated phosphorylation sites on Tau-mediated neurotoxicity. We present evidence that the late-appearing phosphorylation on Ser(238) rather than hyperphosphorylation per se is essential for Tau toxicity underlying premature mortality in adult flies. This site is also occupied at the time of neurodegeneration onset in a mouse Tauopathy model and in damaged brain areas of confirmed Tauopathy patients, suggesting a similar critical role on Tau toxicity in humans. In contrast, occupation of Ser(262) is necessary for Tau-dependent learning deficits in adult Drosophila. Significantly, occupation of Ser(262) precedes and is required for Ser(238) phosphorylation, and these temporally distinct phosphorylations likely reflect conformational changes. Because sequential occupation of Ser(262) and Ser(238) is required for the progression from Tau-mediated learning deficits to premature mortality in Drosophila, they may also play similar roles in the escalating symptom severity in Tauopathy patients, congruent with their presence in damaged regions of their brains.
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Affiliation(s)
- Katerina Papanikolopoulou
- Division of Neuroscience, Biomedical Sciences Research Centre 'Alexander Fleming', Vari 16672, Greece
| | - Efthimios M C Skoulakis
- Division of Neuroscience, Biomedical Sciences Research Centre 'Alexander Fleming', Vari 16672, Greece
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15
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Gao X, He Y, Gao LM, Feng J, Xie Y, Liu X, Liu L. Ser9-phosphorylated GSK3β induced by 14-3-3ζ actively antagonizes cell apoptosis in a NF-κB dependent manner. Biochem Cell Biol 2014; 92:349-56. [PMID: 25138042 DOI: 10.1139/bcb-2014-0065] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The activity of glycogen synthase kinase beta (GSK3β) is mainly regulated by its Ser9 phosphorylation. It has been believed for a long time that Ser9 phosphorylation regulates the functions of GSK3β through inhibition of its kinase activity. In this study, we have confirmed the interaction of Ser9-phosphorylated GSK3β with 14-3-3ζ by using GST pull-down assays. We show that 14-3-3ζ enhances Ser9 phosphorylation of GSK3β by PKC. Surprisingly, using a NF-κB luciferase reporter system, we find that Ser9-phosphorylation of GSK3β promoted by 14-3-3ζ is critical for the activation of NF-κB pathway, which may thwart the pro-apoptotic activity of GSK3β. Inhibition of either NF-κB or GSK3β significantly abolishes the anti-apoptotic effect of 14-3-3ζ and Ser9-phosphorylated GSK3β, suggesting that Ser9-phosphorylated GSK3β actively antagonizes cell apoptosis in a NF-κB dependent manner.
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Affiliation(s)
- Xuejuan Gao
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou 510632, China
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16
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Qureshi HY, Li T, MacDonald R, Cho CM, Leclerc N, Paudel HK. Interaction of 14-3-3ζ with microtubule-associated protein tau within Alzheimer's disease neurofibrillary tangles. Biochemistry 2013; 52:6445-55. [PMID: 23962087 DOI: 10.1021/bi400442d] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Alzheimer's disease (AD) is characterized by the presence of abnormal, straight filaments and paired helical filaments (PHFs) that are coated with amorphous aggregates. When PHFs are treated with alkali, they untwist and form filaments with a ribbonlike morphology. Tau protein is the major component of all of these ultrastructures. 14-3-3ζ is present in NFTs and is significantly upregulated in AD brain. The molecular basis of the association of 14-3-3ζ within NFTs and the pathological significance of its association are not known. In this study, we have found that 14-3-3ζ is copurified and co-immunoprecipitates with tau from NFTs of AD brain extract. In vitro, tau binds to both phosphorylated and nonphosphorylated tau. When incubated with 14-3-3ζ, tau forms amorphous aggregates, single-stranded, straight filaments, ribbonlike filaments, and PHF-like filaments, all of which resemble the corresponding ultrastructures found in AD brain. Immuno-electron microscopy determined that both tau and 14-3-3ζ are present in these ultrastructures and that they are formed in an incubation time-dependent manner. Amorphous aggregates are formed first. As the incubation time increases, the size of amorphous aggregates increases and they are incorporated into single-stranded filaments. Single-stranded filaments laterally associate to form double-stranded, ribbonlike, and PHF-like filaments. Both tau and phosphorylated tau aggregate in a similar manner when they are incubated with 14-3-3ζ. Our data suggest that 14-3-3ζ has a role in the fibrillization of tau in AD brain, and that tau phosphorylation does not affect 14-3-3ζ-induced tau aggregation.
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Affiliation(s)
- Hamid Y Qureshi
- The Bloomfield Center for Research in Aging, Lady Davis Institute for Medical Research, Jewish General Hospital , 3755 Côte-Sainte-Catherine Road, Montreal, Quebec, Canada H3T 1E2
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17
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Gao X, Wang JY, Gao LM, Yin XF, Liu L. Identification and analysis of glycogen synthase kinase 3 beta1 interactome. Cell Biol Int 2013; 37:768-79. [DOI: 10.1002/cbin.10095] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Accepted: 02/27/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Xuejuan Gao
- Institute of Life and Health Engineering; Jinan University; Guangzhou; 510632; China
| | - Jian-Ying Wang
- Institute of Life and Health Engineering; Jinan University; Guangzhou; 510632; China
| | - Ling-Mei Gao
- Institute of Life and Health Engineering; Jinan University; Guangzhou; 510632; China
| | - Xing-Feng Yin
- Institute of Life and Health Engineering; Jinan University; Guangzhou; 510632; China
| | - Langxia Liu
- Institute of Life and Health Engineering; Jinan University; Guangzhou; 510632; China
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18
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Hashiguchi M, Hashiguchi T. Kinase–Kinase Interaction and Modulation of Tau Phosphorylation. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2013; 300:121-60. [DOI: 10.1016/b978-0-12-405210-9.00004-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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19
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Liang D, Han G, Feng X, Sun J, Duan Y, Lei H. Concerted perturbation observed in a hub network in Alzheimer's disease. PLoS One 2012; 7:e40498. [PMID: 22815752 PMCID: PMC3398025 DOI: 10.1371/journal.pone.0040498] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Accepted: 06/11/2012] [Indexed: 12/31/2022] Open
Abstract
Alzheimer’s disease (AD) is a progressive neurodegenerative disease involving the alteration of gene expression at the whole genome level. Genome-wide transcriptional profiling of AD has been conducted by many groups on several relevant brain regions. However, identifying the most critical dys-regulated genes has been challenging. In this work, we addressed this issue by deriving critical genes from perturbed subnetworks. Using a recent microarray dataset on six brain regions, we applied a heaviest induced subgraph algorithm with a modular scoring function to reveal the significantly perturbed subnetwork in each brain region. These perturbed subnetworks were found to be significantly overlapped with each other. Furthermore, the hub genes from these perturbed subnetworks formed a connected hub network consisting of 136 genes. Comparison between AD and several related diseases demonstrated that the hub network was robustly and specifically perturbed in AD. In addition, strong correlation between the expression level of these hub genes and indicators of AD severity suggested that this hub network can partially reflect AD progression. More importantly, this hub network reflected the adaptation of neurons to the AD-specific microenvironment through a variety of adjustments, including reduction of neuronal and synaptic activities and alteration of survival signaling. Therefore, it is potentially useful for the development of biomarkers and network medicine for AD.
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Affiliation(s)
- Dapeng Liang
- CAS key laboratory of genome sciences and information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
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20
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Lalle M, Camerini S, Cecchetti S, Sayadi A, Crescenzi M, Pozio E. Interaction Network of the 14-3-3 Protein in the Ancient Protozoan Parasite Giardia duodenalis. J Proteome Res 2012; 11:2666-83. [DOI: 10.1021/pr3000199] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Marco Lalle
- Department of Infectious, Parasitic
and Immunomediated Diseases, Istituto Superiore di Sanità, 00161 Rome, Italy
| | - Serena Camerini
- Department
of Cell Biology and
Neurosciences, Istituto Superiore di Sanità, 00161 Rome, Italy
| | - Serena Cecchetti
- Department
of Cell Biology and
Neurosciences, Istituto Superiore di Sanità, 00161 Rome, Italy
| | - Ahmed Sayadi
- Department
of Biochemical Sciences
“A. Rossi-Fanelli”, University of Rome “Sapienza”, 00185 Rome, Italy
| | - Marco Crescenzi
- Department
of Cell Biology and
Neurosciences, Istituto Superiore di Sanità, 00161 Rome, Italy
| | - Edoardo Pozio
- Department of Infectious, Parasitic
and Immunomediated Diseases, Istituto Superiore di Sanità, 00161 Rome, Italy
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21
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Abstract
Tauopathies are age-related neurodegenerative diseases that are characterized by the presence of aggregates of abnormally phosphorylated tau. As tau was originally discovered as a microtubule-associated protein, it has been hypothesized that neurodegeneration results from a loss of the ability of tau to associate with microtubules. However, tau has been found to have other functions aside from the promotion and stabilization of microtubule assembly. It is conceivable that such functions may be affected by the abnormal phosphorylation of tau and might have consequences for neuronal function or viability. This chapter provides an overview of tau structure, functions, and its involvement in neurodegenerative diseases.
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22
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Goñi-Oliver P, Avila J, Hernández F. Calpain regulates N-terminal interaction of GSK-3β with 14-3-3ζ, p53 and PKB but not with axin. Neurochem Int 2011; 59:97-100. [DOI: 10.1016/j.neuint.2011.03.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Revised: 03/11/2011] [Accepted: 03/22/2011] [Indexed: 11/27/2022]
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23
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Verma NK, Dempsey E, Freeley M, Botting CH, Long A, Kelleher D, Volkov Y. Analysis of dynamic tyrosine phosphoproteome in LFA-1 triggered migrating T-cells. J Cell Physiol 2011; 226:1489-98. [PMID: 20945386 DOI: 10.1002/jcp.22478] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The ordered, directional migration of T-lymphocytes is a key process during immune surveillance and response. This requires cell adhesion to the high endothelial venules or to the extracellular matrix by a series of surface receptor/ligand interactions involving adhesion molecules of the integrin family including lymphocyte function associated molecule-1 (LFA-1) and intercellular adhesion molecules (ICAMs). Reversible protein phosphorylation is emerging as a key player in the regulation of biological functions with tyrosine phosphorylation playing a crucial role in signal transduction. Thus, the study of this type of post-translational modification at the proteomic level has great biological significance. In this work, phospho-enriched cell lysates from LFA-1-triggered migrating human T-cells were subjected to immunoaffinity purification of tyrosine phosphorylated proteins, mass spectrometric, and bioinformatic analysis. In addition to the identification of several well-documented proteins, the analysis suggested involvement of a number of new and novel proteins in LFA-1 induced T-cell migration. This dataset expands the list of the signaling components of the LFA-1 induced phosphotyrosine protein complexes in migrating T-cells that will be extremely useful in the study of their specific roles within LFA-1 associated signaling pathways. Identification of proteins previously not reported in the context of LFA-1 stimulated signal transduction might provide new insights into understanding the LFA-1 signaling networks and aid in the search for new potential therapeutic targets.
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Affiliation(s)
- Navin K Verma
- Department of Clinical Medicine, Institute of Molecular Medicine, Trinity College Dublin, Ireland.
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24
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Di Domenico F, Owen JB, Sultana R, Sowell RA, Perluigi M, Cini C, Cai J, Pierce WM, Butterfield DA. The wheat germ agglutinin-fractionated proteome of subjects with Alzheimer's disease and mild cognitive impairment hippocampus and inferior parietal lobule: Implications for disease pathogenesis and progression. J Neurosci Res 2010; 88:3566-77. [PMID: 20936705 DOI: 10.1002/jnr.22528] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Revised: 08/28/2010] [Accepted: 09/03/2010] [Indexed: 01/07/2023]
Abstract
Lectin affinity chromatography is a powerful separation technique that fractionates proteins by selectively binding to specific carbohydrate moieties characteristic of protein glycosylation type. Wheat germ agglutinin (WGA) selectively binds terminal N-acetylglucosamine (O-GlcNAc) and sialic acid moieties characteristic of O-linked glycosylation. The current study utilizes WGA affinity chromatography to fractionate proteins from hippocampus and inferior parietal lobule (IPL) from subjects with Alzheimer's disease (AD) and arguably its earliest form, mild cognitive impairment (MCI). Proteins identified by proteomics that were fractionated from MCI and AD hippocampus by WGA affinity chromatography with altered levels compared with age-matched controls included GP96, γ-enolase, glutamate dehydrogenase, glucosidase IIα, 14-3-3ϵ, 14-3-3γ, 14-3-3ζ, tropomyosin-2, calmodulin 2, gelsolin, β-synuclein, α1-antichymotrypsin, and dimethylguanosine tRNA methyltransferase. Proteins identified by proteomics that were fractionated from MCI and AD IPL by WGA affinity chromatography showing altered levels compared with age-matched controls included protein disulfide isomerase, calreticulin, and GP96. The proteins described in this study are involved in diverse processes, including glucose metabolism, endoplasmic reticulum (ER) functions, chaperoning, cytoskeletal assembly, and proteolysis, all of which are affected in AD. This study, the first to use proteomics to identify WGA-fractionated proteins isolated from brains from subjects with MCI and AD, provides additional information about the active proteome of the brain throughout AD progression.
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Affiliation(s)
- Fabio Di Domenico
- Department of Biochemical Sciences, Sapienza University of Rome, Rome, Italy.
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Reynolds CH, Garwood CJ, Wray S, Price C, Kellie S, Perera T, Zvelebil M, Yang A, Sheppard PW, Varndell IM, Hanger DP, Anderton BH. Phosphorylation regulates tau interactions with Src homology 3 domains of phosphatidylinositol 3-kinase, phospholipase Cgamma1, Grb2, and Src family kinases. J Biol Chem 2008; 283:18177-86. [PMID: 18467332 DOI: 10.1074/jbc.m709715200] [Citation(s) in RCA: 175] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The microtubule-associated protein tau can associate with various other proteins in addition to tubulin, including the SH3 domains of Src family tyrosine kinases. Tau is well known to aggregate to form hyperphosphorylated filamentous deposits in several neurodegenerative diseases (tauopathies) including Alzheimer disease. We now report that tau can bind to SH3 domains derived from the p85alpha subunit of phosphatidylinositol 3-kinase, phospholipase Cgamma1, and the N-terminal (but not the C-terminal) SH3 of Grb2 as well as to the kinases Fyn, cSrc, and Fgr. However, the short inserts found in neuron-specific isoforms of Src prevented the binding of tau. The experimentally determined binding of tau peptides is well accounted for when modeled into the peptide binding cleft in the SH3 domain of Fyn. After phosphorylation in vitro or in transfected cells, tau showed reduced binding to SH3 domains; no binding was detected with hyperphosphorylated tau isolated from Alzheimer brain, but SH3 binding was restored by phosphatase treatment. Tau mutants with serines and threonines replaced by glutamate, to mimic phosphorylation, showed reduced SH3 binding. These results strongly suggest that tau has a potential role in cell signaling in addition to its accepted role in cytoskeletal assembly, with regulation by phosphorylation that may be disrupted in the tauopathies including Alzheimer disease.
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Affiliation(s)
- C Hugh Reynolds
- The MRC Centre for Neurodegeneration Research, King's College London, Institute of Psychiatry, London, UK.
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Nelson TJ, Alkon DL. Protection against beta-amyloid-induced apoptosis by peptides interacting with beta-amyloid. J Biol Chem 2007; 282:31238-49. [PMID: 17761669 DOI: 10.1074/jbc.m705558200] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
beta-Amyloid peptide produces apoptosis in neurons at micromolar concentrations, but the mechanism by which beta-amyloid exerts its toxic effect is unknown. The normal biological function of beta-amyloid is also unknown. We used phage display, co-precipitation, and mass spectrometry to examine the protein-protein interactions of beta-amyloid in normal rabbit brain in order to identify the biochemical receptors for beta-amyloid. beta-Amyloid was found to bind primarily to proteins involved in low density lipoprotein and cholesterol transport and metabolism, including sortilin, endoplasmic reticulum-Golgi intermediate compartment 2 (ERGIC2), ERGIC-53, steroid 5alpha-reductase, and apolipoprotein B. beta-Amyloid also bound to the C-reactive protein precursor, a protein involved in inflammation, and to 14-3-3, a protein that regulates glycogen synthase kinase-3beta, the kinase involved in tau phosphorylation. Of eight synthetic peptides identified as targets of beta-amyloid, three were found to be effective blockers of the toxic effect of beta-amyloid on cultured neuronal cells. These peptides bound to the hydrophobic region (residues 17-21) or to the nearby protein kinase C pseudo-phosphorylation site (residues 26-30) of beta-amyloid, suggesting that these may be the most critical regions for beta-amyloid effector action and for aggregation. Peptides or other small molecules that bind to this region may protect against beta-amyloid toxic effect by competitively blocking its ability to bind beta-amyloid effector proteins such as sortilin and 14-3-3.
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Affiliation(s)
- Thomas J Nelson
- Blanchette Rockefeller Neurosciences Institute, Rockville, Maryland 20850, USA.
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