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Cario A, Wickramasinghe SP, Rhoades E, Berger CL. The N-terminal disease-associated R5L Tau mutation increases microtubule shrinkage rate due to disruption of microtubule-bound Tau patches. J Biol Chem 2022; 298:102526. [PMID: 36162501 PMCID: PMC9589210 DOI: 10.1016/j.jbc.2022.102526] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 09/07/2022] [Accepted: 09/08/2022] [Indexed: 11/25/2022] Open
Abstract
Regulation of the neuronal microtubule cytoskeleton is achieved through the coordination of microtubule-associated proteins (MAPs). MAP-Tau, the most abundant MAP in the axon, functions to modulate motor motility, participate in signaling cascades, as well as directly mediate microtubule dynamics. Tau misregulation is associated with a class of neurodegenerative diseases, known as tauopathies, including progressive supranuclear palsy, Pick's disease, and Alzheimer's disease. Many disease-associated mutations in Tau are found in the C-terminal microtubule-binding domain. These mutations decrease microtubule-binding affinity and are proposed to reduce microtubule stability, leading to disease. N-terminal disease-associated mutations also exist, but the mechanistic details of their downstream effects are not as clear. Here, we investigate the effect of the progressive supranuclear palsy–associated N-terminal R5L mutation on Tau-mediated microtubule dynamics using an in vitro reconstituted system. We show that the R5L mutation does not alter Tau interactions with tubulin by fluorescence correlation spectroscopy. Using total internal reflection fluorescence microscopy, we determined that the R5L mutation has no effect on microtubule growth rate, catastrophe frequency, or rescue frequency. Rather, the R5L mutation increases microtubule shrinkage rate. We determine this is due to disruption of Tau patches, larger order Tau complexes known to form on the GDP-microtubule lattice. Altogether, these results provide insight into the role of Tau patches in mediating microtubule dynamics and suggesting a novel mechanism by which mutations in the N-terminal projection domain reduce microtubule stability.
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Affiliation(s)
- Alisa Cario
- Department of Molecular Physiology and Biophysics, University of Vermont, Burlington, VT 05405
| | - Sanjula P Wickramasinghe
- Biochemistry and Molecular Biophysics Graduate Group, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Elizabeth Rhoades
- Biochemistry and Molecular Biophysics Graduate Group, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Christopher L Berger
- Department of Molecular Physiology and Biophysics, University of Vermont, Burlington, VT 05405.
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2
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Wang R, Gao H, Xie H, Jia Z, Chen Q. Molecular imaging biomarkers in familial frontotemporal lobar degeneration: Progress and prospects. Front Neurol 2022; 13:933217. [PMID: 36051222 PMCID: PMC9424494 DOI: 10.3389/fneur.2022.933217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 07/25/2022] [Indexed: 12/01/2022] Open
Abstract
Familial frontotemporal lobar degeneration (FTLD) is a pathologically heterogeneous group of neurodegenerative diseases with diverse genotypes and clinical phenotypes. Three major mutations were reported in patients with familial FTLD, namely, progranulin (GRN), microtubule-associated protein tau (MAPT), and the chromosome 9 open reading frame 72 (C9orf72) repeat expansion, which could cause neurodegenerative pathological changes years before symptom onset. Noninvasive quantitative molecular imaging with PET or single-photon emission CT (SPECT) allows for selective visualization of the molecular targets in vivo to investigate brain metabolism, perfusion, neuroinflammation, and pathophysiological changes. There was increasing evidence that several molecular imaging biomarkers tend to serve as biomarkers to reveal the early brain abnormalities in familial FTLD. Tau-PET with 18F-flortaucipir and 11C-PBB3 demonstrated the elevated tau position in patients with FTLD and also showed the ability to differentiate patterns among the different subtypes of the mutations in familial FTLD. Furthermore, dopamine transporter imaging with the 11C-DOPA and 11C-CFT in PET and the 123I-FP-CIT in SPECT revealed the loss of dopaminergic neurons in the asymptomatic and symptomatic patients of familial FTLD. In addition, PET imaging with the 11C-MP4A has demonstrated reduced acetylcholinesterase (AChE) activity in patients with FTLD, while PET with the 11C-DAA1106 and 11C-PK11195 revealed an increased level of microglial activation associated with neuroinflammation even before the onset of symptoms in familial FTLD. 18F-fluorodeoxyglucose (FDG)-PET indicated hypometabolism in FTLD with different mutations preceded the atrophy on MRI. Identifying molecular imaging biomarkers for familial FTLD is important for the in-vivo assessment of underlying pathophysiological changes with disease progression and future disease-modifying therapy. We review the recent progress of molecular imaging in familial FTLD with focused on the possible implication of these techniques and their prospects in specific mutation types.
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Affiliation(s)
- Ruihan Wang
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China
| | - Hui Gao
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China
| | - Hongsheng Xie
- Department of Nuclear Medicine, West China Hospital of Sichuan University, Chengdu, China
| | - Zhiyun Jia
- Department of Nuclear Medicine, West China Hospital of Sichuan University, Chengdu, China
| | - Qin Chen
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China
- *Correspondence: Qin Chen
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Cimini S, Giaccone G, Tagliavini F, Costantino M, Perego P, Rossi G. P301L tau mutation leads to alterations of cell cycle, DNA damage response and apoptosis: evidence for a role of tau in cancer. Biochem Pharmacol 2022; 200:115043. [DOI: 10.1016/j.bcp.2022.115043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 04/11/2022] [Indexed: 01/14/2023]
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Kopach O, Esteras N, Wray S, Abramov AY, Rusakov DA. Genetically engineered MAPT 10+16 mutation causes pathophysiological excitability of human iPSC-derived neurons related to 4R tau-induced dementia. Cell Death Dis 2021; 12:716. [PMID: 34274950 PMCID: PMC8286258 DOI: 10.1038/s41419-021-04007-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 07/07/2021] [Accepted: 07/08/2021] [Indexed: 01/02/2023]
Abstract
Human iPSC lines represent a powerful translational model of tauopathies. We have recently described a pathophysiological phenotype of neuronal excitability of human cells derived from the patients with familial frontotemporal dementia and parkinsonism (FTDP-17) caused by the MAPT 10+16 splice-site mutation. This mutation leads to the increased splicing of 4R tau isoforms. However, the role of different isoforms of tau protein in initiating neuronal dementia-related dysfunction, and the causality between the MAPT 10+16 mutation and altered neuronal activity have remained unclear. Here, we employed genetically engineered cells, in which the IVS10+16 mutation was introduced into healthy donor iPSCs to increase the expression of 4R tau isoform in exon 10, aiming to explore key physiological traits of iPSC-derived MAPT IVS10+16 neurons using patch-clamp electrophysiology and multiphoton fluorescent imaging techniques. We found that during late in vitro neurogenesis (from ~180 to 230 days) iPSC-derived cortical neurons of the control group (parental wild-type tau) exhibited membrane properties compatible with "mature" neurons. In contrast, MAPT IVS10+16 neurons displayed impaired excitability, as reflected by a depolarized resting membrane potential, an increased input resistance, and reduced voltage-gated Na+- and K+-channel-mediated currents. The mutation changed the channel properties of fast-inactivating Nav and decreased the Nav1.6 protein level. MAPT IVS10+16 neurons exhibited reduced firing accompanied by a changed action potential waveform and severely disturbed intracellular Ca2+ dynamics, both in the soma and dendrites, upon neuronal depolarization. These results unveil a causal link between the MAPT 10+16 mutation, hence overproduction of 4R tau, and a dysfunction of human cells, identifying a biophysical basis of changed neuronal activity in 4R tau-triggered dementia. Our study lends further support to using iPSC lines as a suitable platform for modelling tau-induced human neuropathology in vitro.
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Affiliation(s)
- Olga Kopach
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK.
| | - Noemí Esteras
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
| | - Selina Wray
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
| | - Andrey Y Abramov
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
| | - Dmitri A Rusakov
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
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5
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Esteras N, Kopach O, Maiolino M, Lariccia V, Amoroso S, Qamar S, Wray S, Rusakov DA, Jaganjac M, Abramov AY. Mitochondrial ROS control neuronal excitability and cell fate in frontotemporal dementia. Alzheimers Dement 2021; 18:318-338. [PMID: 34057756 DOI: 10.1002/alz.12394] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 04/15/2021] [Accepted: 05/06/2021] [Indexed: 12/29/2022]
Abstract
INTRODUCTION The second most common form of early-onset dementia-frontotemporal dementia (FTD)-is often characterized by the aggregation of the microtubule-associated protein tau. Here we studied the mechanism of tau-induced neuronal dysfunction in neurons with the FTD-related 10+16 MAPT mutation. METHODS Live imaging, electrophysiology, and redox proteomics were used in 10+16 induced pluripotent stem cell-derived neurons and a model of tau spreading in primary cultures. RESULTS Overproduction of mitochondrial reactive oxygen species (ROS) in 10+16 neurons alters the trafficking of specific glutamate receptor subunits via redox regulation. Increased surface expression of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) and N-methyl-D-aspartate (NMDA) receptors containing GluA1 and NR2B subunits leads to impaired glutamatergic signaling, calcium overload, and excitotoxicity. Mitochondrial antioxidants restore the altered response and prevent neuronal death. Importantly, extracellular 4R tau induces the same pathological response in healthy neurons, thus proposing a mechanism for disease propagation. DISCUSSION These results demonstrate mitochondrial ROS modulate glutamatergic signaling in FTD, and suggest a new therapeutic strategy.
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Affiliation(s)
- Noemí Esteras
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
| | - Olga Kopach
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
| | - Marta Maiolino
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche,", Ancona, Italy
| | - Vincenzo Lariccia
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche,", Ancona, Italy
| | - Salvatore Amoroso
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche,", Ancona, Italy
| | - Seema Qamar
- Department of Clinical Neurosciences, Cambridge Institute for Medical Research, University of Cambridge, Cambridge, UK
| | - Selina Wray
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
| | - Dmitri A Rusakov
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
| | - Morana Jaganjac
- Qatar Analytics & BioResearch Lab, Anti-Doping Lab Qatar, Doha, Qatar.,Division of Molecular Medicine, Rudjer Boskovic Institute, Zagreb, Croatia
| | - Andrey Y Abramov
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
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6
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Xia Y, Nasif L, Giasson BI. Pathogenic MAPT mutations Q336H and Q336R have isoform-dependent differences in aggregation propensity and microtubule dysfunction. J Neurochem 2021; 158:455-466. [PMID: 33772783 DOI: 10.1111/jnc.15358] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/24/2021] [Accepted: 03/18/2021] [Indexed: 12/29/2022]
Abstract
Tauopathies are a group of heterogeneous neurodegenerative disorders characterized by brain deposition of tau inclusions. These insidious disorders include Alzheimer's disease and frontotemporal dementia, the two leading causes of dementia. Mutations in the microtubule-associated protein tau (MAPT) gene lead to familial forms of frontotemporal dementia. Previously, we used cell-based assays to screen over 20 missense tau mutations and found that decreased microtubule (MT) binding affinity was the most shared property. As a break from this trend, the MAPT mutations Q336H and Q336R are thought to promote MT assembly rather than inhibit it based on in vitro studies. Q336H and Q336R MAPT mutations also cause early onset frontotemporal dementia with Pick bodies, which are mostly composed of 3R tau isoforms. To provide further insights on the pathobiology of these mutations, we assessed Q336H and Q336R tau mutants for aggregation propensity and MT binding in cell-based assays in the context of both 0N3R and 0N4R tau isoforms. Q336R tau was prone to prion-like seeded aggregation but both Q336H and Q336R tau led to increased MT binding. Additionally, we found that different tau isoforms with these mutations heterogeneously regulate different MT subpopulations of tyrosinated and acetylated MTs, markers of newly formed MTs and stable MTs. The Q336H and Q336R tau mutations may exemplify an alternative mechanism where pathogenic tau can bind MTs with higher affinity and hyperstabilize MTs, which prevent proper MT regulation and homeostasis.
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Affiliation(s)
- Yuxing Xia
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, FL, USA.,Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Lith Nasif
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, FL, USA.,Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Benoit I Giasson
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, FL, USA.,Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, FL, USA.,McKnight Brain Institute, College of Medicine, University of Florida, Gainesville, FL, USA
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Chen Q, Kantarci K. Imaging Biomarkers for Neurodegeneration in Presymptomatic Familial Frontotemporal Lobar Degeneration. Front Neurol 2020; 11:80. [PMID: 32184751 PMCID: PMC7058699 DOI: 10.3389/fneur.2020.00080] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 01/22/2020] [Indexed: 02/05/2023] Open
Abstract
Frontotemporal lobar degeneration (FTLD) is a neurodegenerative disorder characterized by behavioral changes, language abnormality, as well as executive function deficits and motor impairment. In about 30-50% of FTLD patients, an autosomal dominant pattern of inheritance was found with major mutations in the MAPT, GRN, and the C9orf72 repeat expansion. These mutations could lead to neurodegenerative pathology years before clinical symptoms onset. With potential disease-modifying treatments that are under development, non-invasive biomarkers that help determine the early brain changes in presymptomatic FTLD patients will be critical for tracking disease progression and enrolling the right participants into the clinical trials at the right time during the disease course. In recent years, there is increasing evidence that a number of imaging biomarkers show the abnormalities during the presymptomatic stage. Imaging biomarkers of presymptomatic familial FTLD may provide insight into the underlying neurodegenerative process years before symptom onset. Structural magnetic resonance imaging (MRI) has demonstrated cortical degeneration with a mutation-specific neurodegeneration pattern years before onset of clinical symptoms in presymptomatic familial FTLD mutation carriers. In addition, diffusion tensor imaging (DTI) has shown the loss of white matter microstructural integrity in the presymptomatic stage of familial FTLD. Furthermore, proton magnetic resonance spectroscopy (1H MRS), which provides a non-invasive measurement of brain biochemistry, has identified early neurochemical abnormalities in presymptomatic MAPT mutation carriers. Positron emission tomography (PET) imaging with [18F]-fluorodeoxyglucose (FDG) has demonstrated the glucose hypometabolism in the presymptomatic stage of familial FTLD. Also, a novel PET ligand, 18F-AV-1451, has been used in this group to evaluate tau deposition in the brain. Promising imaging biomarkers for presymptomatic familial FTLD have been identified and assessed for specificity and sensitivity for accurate prediction of symptom onset and tracking disease progression during the presymptomatic stage when clinical measures are not useful. Furthermore, identifying imaging biomarkers for the presymptomatic stage is important for the design of disease-modifying trials. We review the recent progress in imaging biomarkers of the presymptomatic phase of familial FTLD and discuss the imaging techniques and analysis methods, with a focus on the potential implication of these imaging techniques and their utility in specific mutation types.
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Affiliation(s)
- Qin Chen
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China.,Department of Radiology, Mayo Clinic, Rochester, MN, United States
| | - Kejal Kantarci
- Department of Radiology, Mayo Clinic, Rochester, MN, United States
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8
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Chen Q, Boeve BF, Schwarz CG, Reid R, Tosakulwong N, Lesnick TG, Bove J, Brannelly P, Brushaber D, Coppola G, Dheel C, Dickerson BC, Dickinson S, Faber K, Fields J, Fong J, Foroud T, Forsberg L, Gavrilova RH, Gearhart D, Ghoshal N, Goldman J, Graff-Radford J, Graff-Radford NR, Grossman M, Haley D, Heuer HW, Hsiung GYR, Huey E, Irwin DJ, Jack CR, Jones DT, Jones L, Karydas AM, Knopman DS, Kornak J, Kramer J, Kremers W, Kukull WA, Lapid M, Lucente D, Lungu C, Mackenzie IRA, Manoochehri M, McGinnis S, Miller BL, Pearlman R, Petrucelli L, Potter M, Rademakers R, Ramos EM, Rankin KP, Rascovsky K, Sengdy P, Shaw L, Syrjanen J, Tatton N, Taylor J, Toga AW, Trojanowski J, Weintraub S, Wong B, Boxer AL, Rosen H, Wszolek Z, Kantarci K. Tracking white matter degeneration in asymptomatic and symptomatic MAPT mutation carriers. Neurobiol Aging 2019; 83:54-62. [PMID: 31585367 PMCID: PMC6858933 DOI: 10.1016/j.neurobiolaging.2019.08.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 08/07/2019] [Accepted: 08/11/2019] [Indexed: 02/05/2023]
Abstract
Our aim was to investigate the patterns and trajectories of white matter (WM) diffusion abnormalities in microtubule-associated protein tau (MAPT) mutations carriers. We studied 22 MAPT mutation carriers (12 asymptomatic, 10 symptomatic) and 20 noncarriers from 8 families, who underwent diffusion tensor imaging (DTI) and a subset (10 asymptomatic, 6 symptomatic MAPT mutation carriers, and 10 noncarriers) were followed annually (median = 4 years). Cross-sectional and longitudinal changes in mean diffusivity (MD) and fractional anisotropy were analyzed. Asymptomatic MAPT mutation carriers had higher MD in entorhinal WM, which propagated to the limbic tracts and frontotemporal projections in the symptomatic stage compared with noncarriers. Reduced fractional anisotropy and increased MD in the entorhinal WM were associated with the proximity to estimated and actual age of symptom onset. The annualized change of entorhinal MD on serial DTI was accelerated in MAPT mutation carriers compared with noncarriers. Entorhinal WM diffusion abnormalities precede the symptom onset and track with disease progression in MAPT mutation carriers. Our cross-sectional and longitudinal data showed a potential clinical utility for DTI to track neurodegenerative disease progression for MAPT mutation carriers in clinical trials.
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Affiliation(s)
- Qin Chen
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, Sichuan, China; Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | | | | | - Robert Reid
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | | | - Timothy G Lesnick
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Jessica Bove
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Patrick Brannelly
- Tau Consortium, Rainwater Charitable Foundation, Fort Worth, TX, USA
| | | | - Giovanni Coppola
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, Los Angeles, CA, USA
| | | | - Bradford C Dickerson
- Department of Neurology, Frontotemporal Disorders Unit, Massachusetts General Hospital, Harvard University, Boston, MA, USA
| | - Susan Dickinson
- Association for Frontotemporal Degeneration, Radnor, PA, USA
| | - Kelley Faber
- National Cell Repository for Alzheimer's Disease (NCRAD), Indiana University, Indianapolis, IN, USA
| | - Julie Fields
- Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA
| | - Jamie Fong
- Department of Neurology, Memory and Aging Center, University of California, San Francisco, San Francisco, CA, USA
| | - Tatiana Foroud
- National Cell Repository for Alzheimer's Disease (NCRAD), Indiana University, Indianapolis, IN, USA
| | - Leah Forsberg
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | | | - Debra Gearhart
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - Nupur Ghoshal
- Departments of Neurology and Psychiatry, Washington University School of Medicine, St. Louis, MO, USA
| | - Jill Goldman
- Department of Neurology, Columbia University, New York, NY, USA
| | | | | | - Murray Grossman
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Dana Haley
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA
| | - Hilary W Heuer
- Department of Neurology, Memory and Aging Center, University of California, San Francisco, San Francisco, CA, USA
| | - Ging-Yuek R Hsiung
- Division of Neurology, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Edward Huey
- Department of Neurology, Columbia University, New York, NY, USA
| | - David J Irwin
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | | | - David T Jones
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - Lynne Jones
- Department of Radiology, Washington University School of Medicine, Washington University, St. Louis, MO, USA
| | - Anna M Karydas
- Department of Neurology, Memory and Aging Center, University of California, San Francisco, San Francisco, CA, USA
| | | | - John Kornak
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA, USA
| | - Joel Kramer
- Department of Neurology, Memory and Aging Center, University of California, San Francisco, San Francisco, CA, USA
| | - Walter Kremers
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Walter A Kukull
- National Alzheimer Coordinating Center (NACC), University of Washington, Seattle, WA, USA
| | - Maria Lapid
- Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA
| | - Diane Lucente
- Department of Neurology, Frontotemporal Disorders Unit, Massachusetts General Hospital, Harvard University, Boston, MA, USA
| | - Codrin Lungu
- National Institute of Neurological Disorders and Stroke (NINDS), Bethesda, MD, USA
| | - Ian R A Mackenzie
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Scott McGinnis
- Department of Neurology, Frontotemporal Disorders Unit, Massachusetts General Hospital, Harvard University, Boston, MA, USA
| | - Bruce L Miller
- Department of Neurology, Memory and Aging Center, University of California, San Francisco, San Francisco, CA, USA
| | | | | | - Madeline Potter
- National Cell Repository for Alzheimer's Disease (NCRAD), Indiana University, Indianapolis, IN, USA
| | - Rosa Rademakers
- Department of Neurosciences, Mayo Clinic, Jacksonville, FL, USA
| | - Eliana M Ramos
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, Los Angeles, CA, USA
| | - Katherine P Rankin
- Department of Neurology, Memory and Aging Center, University of California, San Francisco, San Francisco, CA, USA
| | - Katya Rascovsky
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Pheth Sengdy
- Division of Neurology, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Leslie Shaw
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jeremy Syrjanen
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Nadine Tatton
- Association for Frontotemporal Degeneration, Radnor, PA, USA
| | - Joanne Taylor
- Department of Neurology, Memory and Aging Center, University of California, San Francisco, San Francisco, CA, USA
| | - Arthur W Toga
- Departments of Ophthalmology, Neurology, Psychiatry and the Behavioral Sciences, Laboratory of Neuroimaging (LONI), USC, Los Angeles, CA, USA
| | - John Trojanowski
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Sandra Weintraub
- Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Bonnie Wong
- Department of Neurology, Frontotemporal Disorders Unit, Massachusetts General Hospital, Harvard University, Boston, MA, USA
| | - Adam L Boxer
- Department of Neurology, Memory and Aging Center, University of California, San Francisco, San Francisco, CA, USA
| | - Howie Rosen
- Department of Neurology, Memory and Aging Center, University of California, San Francisco, San Francisco, CA, USA
| | | | - Kejal Kantarci
- Department of Radiology, Mayo Clinic, Rochester, MN, USA.
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9
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Xia Y, Sorrentino ZA, Kim JD, Strang KH, Riffe CJ, Giasson BI. Impaired tau-microtubule interactions are prevalent among pathogenic tau variants arising from missense mutations. J Biol Chem 2019; 294:18488-18503. [PMID: 31653695 DOI: 10.1074/jbc.ra119.010178] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 10/17/2019] [Indexed: 01/22/2023] Open
Abstract
tau is a microtubule (MT)-associated protein that promotes tubulin assembly and stabilizes MTs by binding longitudinally along the MT surface. tau can aberrantly aggregate into pathological inclusions that define Alzheimer's disease, frontotemporal dementias, and other tauopathies. A spectrum of missense mutations in the tau-encoding gene microtubule-associated protein tau (MAPT) can cause frontotemporal dementias. tau aggregation is postulated to spread by a prion-like mechanism. Using a cell-based inclusion seeding assay, we recently reported that only a few tau variants are intrinsically prone to this type of aggregation. Here, we extended these studies to additional tau mutants and investigated their MT binding properties in mammalian cell-based assays. A limited number of tau variants exhibited modest aggregation propensity in vivo, but most tau mutants did not aggregate. Reduced MT binding appeared to be the most common dysfunction for the majority of tau variants due to missense mutations, implying that MT-targeting therapies could potentially be effective in the management of tauopathies.
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Affiliation(s)
- Yuxing Xia
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, Florida 32610; Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, Florida 32610
| | - Zachary A Sorrentino
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, Florida 32610; Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, Florida 32610
| | - Justin D Kim
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, Florida 32610; Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, Florida 32610
| | - Kevin H Strang
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, Florida 32610; Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, Florida 32610
| | - Cara J Riffe
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, Florida 32610; Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, Florida 32610
| | - Benoit I Giasson
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, Florida 32610; Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, Florida 32610; McKnight Brain Institute, College of Medicine, University of Florida, Gainesville, Florida 32610.
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Chen Q, Boeve BF, Senjem M, Tosakulwong N, Lesnick TG, Brushaber D, Dheel C, Fields J, Forsberg L, Gavrilova R, Gearhart D, Graff-Radford J, Graff-Radford NR, Jack CR, Jones DT, Knopman DS, Kremers WK, Lapid M, Rademakers R, Syrjanen J, Boxer AL, Rosen H, Wszolek ZK, Kantarci K. Rates of lobar atrophy in asymptomatic MAPT mutation carriers. ALZHEIMER'S & DEMENTIA (NEW YORK, N. Y.) 2019; 5:338-346. [PMID: 31388560 PMCID: PMC6675939 DOI: 10.1016/j.trci.2019.05.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
INTRODUCTION The aim of this study was to investigate the rates of lobar atrophy in the asymptomatic microtubule-associated protein tau (MAPT) mutation carriers. METHODS MAPT mutation carriers (n = 14; 10 asymptomatic, 4 converters from asymptomatic to symptomatic) and noncarriers (n = 13) underwent structural magnetic resonance imaging and were followed annually with a median of 9.2 years. Longitudinal changes in lobar atrophy were analyzed using the tensor-based morphometry with symmetric normalization algorithm. RESULTS The rate of temporal lobe atrophy in asymptomatic MAPT mutation carriers was faster than that in noncarriers. Although the greatest rate of atrophy was observed in the temporal lobe in converters, they also had increased atrophy rates in the frontal and parietal lobes compared to noncarriers. DISCUSSION Accelerated decline in temporal lobe volume occurs in asymptomatic MAPT mutation carriers followed by the frontal and parietal lobe in those who have become symptomatic. The findings have implications for monitoring the progression of neurodegeneration during clinical trials in asymptomatic MAPT mutation carriers.
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Affiliation(s)
- Qin Chen
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Bradley F. Boeve
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
- Alzheimer's Disease Research Center, Mayo Clinic, Rochester, MN, USA
| | - Matthew Senjem
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | | | | | - Danielle Brushaber
- Alzheimer's Disease Research Center, Mayo Clinic, Rochester, MN, USA
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Christina Dheel
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
- Alzheimer's Disease Research Center, Mayo Clinic, Rochester, MN, USA
| | - Julie Fields
- Department of Psychology and Psychiatry, Mayo Clinic, Rochester, MN, USA
| | - Leah Forsberg
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
- Alzheimer's Disease Research Center, Mayo Clinic, Rochester, MN, USA
| | - Ralitza Gavrilova
- Department of Clinical Genomic and Neurology, Mayo Clinic, Rochester, MN, USA
| | - Debra Gearhart
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
- Alzheimer's Disease Research Center, Mayo Clinic, Rochester, MN, USA
| | - Jonathan Graff-Radford
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
- Alzheimer's Disease Research Center, Mayo Clinic, Rochester, MN, USA
| | | | - Clifford R. Jack
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
- Alzheimer's Disease Research Center, Mayo Clinic, Rochester, MN, USA
| | - David T. Jones
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
- Alzheimer's Disease Research Center, Mayo Clinic, Rochester, MN, USA
| | - David S. Knopman
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
- Alzheimer's Disease Research Center, Mayo Clinic, Rochester, MN, USA
| | - Walter K. Kremers
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Maria Lapid
- Department of Psychology and Psychiatry, Mayo Clinic, Rochester, MN, USA
| | - Rosa Rademakers
- Alzheimer's Disease Research Center, Mayo Clinic, Rochester, MN, USA
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, USA
| | - Jeremy Syrjanen
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Adam L. Boxer
- Memory and Aging Center, University of California San Francisco, San Francisco, CA, USA
| | - Howie Rosen
- Memory and Aging Center, University of California San Francisco, San Francisco, CA, USA
| | | | - Kejal Kantarci
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
- Alzheimer's Disease Research Center, Mayo Clinic, Rochester, MN, USA
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Chen Q, Boeve BF, Tosakulwong N, Lesnick T, Brushaber D, Dheel C, Fields J, Forsberg L, Gavrilova R, Gearhart D, Haley D, Gunter JL, Graff-Radford J, Jones D, Knopman D, Graff-Radford N, Kraft R, Lapid M, Rademakers R, Syrjanen J, Wszolek ZK, Rosen H, Boxer AL, Kantarci K. Frontal lobe 1H MR spectroscopy in asymptomatic and symptomatic MAPT mutation carriers. Neurology 2019; 93:e758-e765. [PMID: 31315971 DOI: 10.1212/wnl.0000000000007961] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 03/26/2019] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE To determine the frontal lobe proton magnetic resonance spectroscopy (1H MRS) abnormalities in asymptomatic and symptomatic carriers of microtubule-associated protein tau (MAPT) mutations. METHODS We recruited patients with MAPT mutations from 5 individual families, who underwent single voxel 1H MRS from the medial frontal lobe at 3T (n = 19) from the Longitudinal Evaluation of Familial Frontotemporal Dementia Subjects (LEFFTDS) Study at the Mayo Clinic site. Asymptomatic MAPT mutation carriers (n = 9) had Frontotemporal Lobar Degeneration Clinical Dementia Rating Sum of Boxes (FTLD-CDR SOB) score of zero, and symptomatic MAPT mutation carriers (n = 10) had a median FTLD-CDR SOB score of 5. Noncarriers from healthy first-degree relatives of the patients were recruited as controls (n = 25). The demographic aspects and 1H MRS metabolite ratios were compared by use of the Fisher exact test for sex and linear mixed models to account for within-family correlations. We used Tukey contrasts for pair-wise comparisons. RESULTS Asymptomatic MAPT mutation carriers had lower neuronal marker N-acetylaspartate (NAA)/creatine (Cr) (p = 0.001) and lower NAA/myo-inositol (mI) (p = 0.026) than noncarriers after adjustment for age. Symptomatic MAPT mutation carriers had lower NAA/Cr (p = 0.01) and NAA/mI (p = 0.01) and higher mI/Cr (p = 0.02) compared to noncarriers after adjustment for age. Furthermore, NAA/Cr (p = 0.006) and NAA/mI (p < 0.001) ratios decreased, accompanied by an increase in mI/Cr ratio (p = 0.001), as the ages of carriers approached and passed the age at symptom onset. CONCLUSION Frontal lobe neurochemical alterations measured with 1H MRS precede the symptom onset in MAPT mutation carriers. Frontal lobe 1H MRS is a potential biomarker for early neurodegenerative processes in MAPT mutation carriers.
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Affiliation(s)
- Qin Chen
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Bradley F Boeve
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Nirubol Tosakulwong
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Timothy Lesnick
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Danielle Brushaber
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Christina Dheel
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Julie Fields
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Leah Forsberg
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Ralitza Gavrilova
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Debra Gearhart
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Dana Haley
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Jeffrey L Gunter
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Jonathan Graff-Radford
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - David Jones
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - David Knopman
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Neill Graff-Radford
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Ruth Kraft
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Maria Lapid
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Rosa Rademakers
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Jeremy Syrjanen
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Zbigniew K Wszolek
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Howie Rosen
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Adam L Boxer
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco
| | - Kejal Kantarci
- From the Department of Radiology (Q.C., J.L.G., K.K.), Department of Neurology (B.F.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K.), Department of Health Sciences Research (N.T., T.L., D.B., J.S.), Department of Psychology and Psychiatry (J.F., M.L.), Department of Clinical Genomic and Neurology (R.G.), Alzheimer's Disease Research Center (B.F.B., D.B., C.D., L.F., D.G., J.G.-R., D.J., D.K., R.K., R.R., K.K.), and Research Services (D.H.), Mayo Clinic, Rochester, MN; Department of Neurology (Q.C.), West China Hospital of Sichuan University, Chengdu, Sichuan; Departments of Neurology (N.G.-R., Z.K.W.) and Neuroscience (R.R.), Mayo Clinic, Jacksonville, FL; and Memory and Aging Center (H.R., A.L.B.), University of California San Francisco.
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12
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Best RL, LaPointe NE, Liang J, Ruan K, Shade MF, Wilson L, Feinstein SC. Tau isoform-specific stabilization of intermediate states during microtubule assembly and disassembly. J Biol Chem 2019; 294:12265-12280. [PMID: 31266806 DOI: 10.1074/jbc.ra119.009124] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 06/24/2019] [Indexed: 01/27/2023] Open
Abstract
The microtubule (MT)-associated protein tau regulates the critical growing and shortening behaviors of MTs, and its normal activity is essential for neuronal development and maintenance. Accordingly, aberrant tau action is tightly associated with Alzheimer's disease and is genetically linked to several additional neurodegenerative diseases known as tauopathies. Although tau is known to promote net MT growth and stability, the precise mechanistic details governing its regulation of MT dynamics remain unclear. Here, we have used the slowly-hydrolyzable GTP analog, guanylyl-(α,β)-methylene-diphosphonate (GMPCPP), to examine the structural effects of tau at MT ends that may otherwise be too transient to observe. The addition of both four-repeat (4R) and three-repeat (3R) tau isoforms to pre-formed GMPCPP MTs resulted in the formation of extended, multiprotofilament-wide projections at MT ends. Furthermore, at temperatures too low for assembly of bona fide MTs, both tau isoforms promoted the formation of long spiral ribbons from GMPCPP tubulin heterodimers. In addition, GMPCPP MTs undergoing cold-induced disassembly in the presence of 4R tau (and to a much lesser extent 3R tau) also formed spirals. Finally, three pathological tau mutations known to cause neurodegeneration and dementia were differentially compromised in their abilities to stabilize MT disassembly intermediates. Taken together, we propose that tau promotes the formation/stabilization of intermediate states in MT assembly and disassembly by promoting both longitudinal and lateral tubulin-tubulin contacts. We hypothesize that these activities represent fundamental aspects of tau action that normally occur at the GTP-rich ends of GTP/GDP MTs and that may be compromised in neurodegeneration-causing tau variants.
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Affiliation(s)
- Rebecca L Best
- Neuroscience Research Institute and Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, California 93106
| | - Nichole E LaPointe
- Neuroscience Research Institute and Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, California 93106
| | - Jiahao Liang
- Neuroscience Research Institute and Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, California 93106
| | - Kevin Ruan
- Neuroscience Research Institute and Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, California 93106
| | - Madeleine F Shade
- Neuroscience Research Institute and Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, California 93106
| | - Leslie Wilson
- Neuroscience Research Institute and Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, California 93106
| | - Stuart C Feinstein
- Neuroscience Research Institute and Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, California 93106.
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13
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Abstract
The microtubule associated protein tau in a hyperphosphorylated form was identified as the building block of the filamentous aggregates found in the neurons of Alzheimer's disease (AD) patients. In the abnormal state, hyperphosphorylated tau from AD brains (AD P-tau) was unable to promote microtubule assembly and more importantly, it could inhibit the normal activity of tau and other MAPs. AD P-tau was able to disrupt preformed microtubules and, by binding to normal tau, turn the latter into an AD P-tau like molecule. AD P-tau toxic behavior was prevalent in the soluble form and it was lost upon dephosphorylation. Mutations on tau associated with disease, e.g., R406W in frontotemporal dementia with Parkinsonism linked to chromosome 17, altered its conformation to make it a better substrate for kinases. Using phospho-mimetics, it was found that the minimum phospho-sites necessary to acquire such a toxic behavior of tau were at 199, 212, 231 and 262, and tau pseudophosphorylated at those sites in combination with R406W was named Pathological Human Tau (PH-Tau). PH-Tau expressed in cells had similar behavior to AD P-tau: disruption of the microtubule system, change in the normal subcellular localization, and gain of toxic function for cells. In animal models expressing PH-Tau, it was found that two putative mechanisms of neurodegeneration exist depending on the concentration of the toxic protein, both involving cognitive decline, due to synaptic dysfunction at lower concentration and neuronal death at higher. Studies investigating the mechanism of tau pathology and its transmission from neuron to neuron are currently ongoing.
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Affiliation(s)
- Alejandra D Alonso
- Department of Biology and Center for Developmental Neuroscience, College of Staten Island, The City University of New York, Staten Island, NY, USA.,Department of Neuroscience, The Graduate Center, The City University of New York, New York, NY, USA
| | - Leah S Cohen
- Department of Biology and Center for Developmental Neuroscience, College of Staten Island, The City University of New York, Staten Island, NY, USA
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14
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Jiang S, Wen N, Li Z, Dube U, Del Aguila J, Budde J, Martinez R, Hsu S, Fernandez MV, Cairns NJ, Harari O, Cruchaga C, Karch CM. Integrative system biology analyses of CRISPR-edited iPSC-derived neurons and human brains reveal deficiencies of presynaptic signaling in FTLD and PSP. Transl Psychiatry 2018; 8:265. [PMID: 30546007 PMCID: PMC6293323 DOI: 10.1038/s41398-018-0319-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 11/13/2018] [Indexed: 01/12/2023] Open
Abstract
Mutations in the microtubule-associated protein tau (MAPT) gene cause autosomal dominant frontotemporal lobar degeneration with tau inclusions (FTLD-tau). MAPT p.R406W carriers present clinically with progressive memory loss and neuropathologically with neuronal and glial tauopathy. However, the pathogenic events triggered by the expression of the mutant tau protein remain poorly understood. To identify the genes and pathways that are dysregulated in FTLD-tau, we performed transcriptomic analyses in induced pluripotent stem cell (iPSC)-derived neurons carrying MAPT p.R406W and CRISPR/Cas9-corrected isogenic controls. We found that the expression of the MAPT p.R406W mutation was sufficient to create a significantly different transcriptomic profile compared with that of the isogeneic controls and to cause the differential expression of 328 genes. Sixty-one of these genes were also differentially expressed in the same direction between MAPT p.R406W carriers and pathology-free human control brains. We found that genes differentially expressed in the stem cell models and human brains were enriched for pathways involving gamma-aminobutyric acid (GABA) receptors and pre-synaptic function. The expression of GABA receptor genes, including GABRB2 and GABRG2, were consistently reduced in iPSC-derived neurons and brains from MAPT p.R406W carriers. Interestingly, we found that GABA receptor genes, including GABRB2 and GABRG2, are significantly lower in symptomatic mouse models of tauopathy, as well as in brains with progressive supranuclear palsy. Genome wide association analyses reveal that common variants within GABRB2 are associated with increased risk for frontotemporal dementia (P < 1 × 10-3). Thus, our systems biology approach, which leverages molecular data from stem cells, animal models, and human brain tissue can reveal novel disease mechanisms. Here, we demonstrate that MAPT p.R406W is sufficient to induce changes in GABA-mediated signaling and synaptic function, which may contribute to the pathogenesis of FTLD-tau and other primary tauopathies.
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Affiliation(s)
- Shan Jiang
- 0000 0001 2355 7002grid.4367.6Department of Psychiatry, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8134, St. Louis, MO 63110 USA ,0000 0001 2355 7002grid.4367.6Hope Center for Neurological Disorders, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8111, St. Louis, MO 63110 USA
| | - Natalie Wen
- 0000 0001 2355 7002grid.4367.6Department of Psychiatry, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8134, St. Louis, MO 63110 USA ,0000 0001 2355 7002grid.4367.6Hope Center for Neurological Disorders, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8111, St. Louis, MO 63110 USA
| | - Zeran Li
- 0000 0001 2355 7002grid.4367.6Department of Psychiatry, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8134, St. Louis, MO 63110 USA ,0000 0001 2355 7002grid.4367.6Hope Center for Neurological Disorders, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8111, St. Louis, MO 63110 USA
| | - Umber Dube
- 0000 0001 2355 7002grid.4367.6Department of Psychiatry, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8134, St. Louis, MO 63110 USA ,0000 0001 2355 7002grid.4367.6Hope Center for Neurological Disorders, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8111, St. Louis, MO 63110 USA
| | - Jorge Del Aguila
- 0000 0001 2355 7002grid.4367.6Department of Psychiatry, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8134, St. Louis, MO 63110 USA ,0000 0001 2355 7002grid.4367.6Hope Center for Neurological Disorders, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8111, St. Louis, MO 63110 USA
| | - John Budde
- 0000 0001 2355 7002grid.4367.6Department of Psychiatry, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8134, St. Louis, MO 63110 USA ,0000 0001 2355 7002grid.4367.6Hope Center for Neurological Disorders, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8111, St. Louis, MO 63110 USA
| | - Rita Martinez
- 0000 0001 2355 7002grid.4367.6Department of Psychiatry, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8134, St. Louis, MO 63110 USA ,0000 0001 2355 7002grid.4367.6Hope Center for Neurological Disorders, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8111, St. Louis, MO 63110 USA
| | - Simon Hsu
- 0000 0001 2355 7002grid.4367.6Department of Psychiatry, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8134, St. Louis, MO 63110 USA ,0000 0001 2355 7002grid.4367.6Hope Center for Neurological Disorders, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8111, St. Louis, MO 63110 USA
| | - Maria V. Fernandez
- 0000 0001 2355 7002grid.4367.6Department of Psychiatry, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8134, St. Louis, MO 63110 USA ,0000 0001 2355 7002grid.4367.6Hope Center for Neurological Disorders, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8111, St. Louis, MO 63110 USA
| | - Nigel J. Cairns
- 0000 0001 2355 7002grid.4367.6Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, 660S. Euclid Ave, Campus Box 8118, Saint Louis, MO 63110 USA
| | | | | | - Oscar Harari
- Department of Psychiatry, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8134, St. Louis, MO, 63110, USA. .,Hope Center for Neurological Disorders, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8111, St. Louis, MO, 63110, USA.
| | - Carlos Cruchaga
- Department of Psychiatry, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8134, St. Louis, MO, 63110, USA. .,Hope Center for Neurological Disorders, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8111, St. Louis, MO, 63110, USA.
| | - Celeste M. Karch
- 0000 0001 2355 7002grid.4367.6Department of Psychiatry, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8134, St. Louis, MO 63110 USA ,0000 0001 2355 7002grid.4367.6Hope Center for Neurological Disorders, Washington University School of Medicine, 660S. Euclid Ave. Campus Box 8111, St. Louis, MO 63110 USA
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15
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Rossi G, Redaelli V, Perego P, Ferrari R, Giaccone G, Tagliavini F. Tau Mutations as a Novel Risk Factor for Cancer-Response. Cancer Res 2018; 78:6525. [PMID: 30373808 DOI: 10.1158/0008-5472.can-18-2730] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 09/12/2018] [Accepted: 09/17/2018] [Indexed: 11/16/2022]
Affiliation(s)
- Giacomina Rossi
- Unit of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy.
| | - Veronica Redaelli
- Unit of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Paola Perego
- Molecular Pharmacology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, Italy
| | - Raffaele Ferrari
- Department of Molecular Neuroscience, UCL Institute of Neurology, London, United Kingdom
| | - Giorgio Giaccone
- Unit of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Fabrizio Tagliavini
- Unit of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
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16
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Alonso AD, Cohen LS, Corbo C, Morozova V, ElIdrissi A, Phillips G, Kleiman FE. Hyperphosphorylation of Tau Associates With Changes in Its Function Beyond Microtubule Stability. Front Cell Neurosci 2018; 12:338. [PMID: 30356756 PMCID: PMC6189415 DOI: 10.3389/fncel.2018.00338] [Citation(s) in RCA: 132] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 09/13/2018] [Indexed: 01/02/2023] Open
Abstract
Tau is a neuronal microtubule associated protein whose main biological functions are to promote microtubule self-assembly by tubulin and to stabilize those already formed. Tau also plays an important role as an axonal microtubule protein. Tau is an amazing protein that plays a key role in cognitive processes, however, deposits of abnormal forms of tau are associated with several neurodegenerative diseases, including Alzheimer disease (AD), the most prevalent, and Chronic Traumatic Encephalopathy (CTE) and Traumatic Brain Injury (TBI), the most recently associated to abnormal tau. Tau post-translational modifications (PTMs) are responsible for its gain of toxic function. Alonso et al. (1996) were the first to show that the pathological tau isolated from AD brains has prion-like properties and can transfer its toxic function to the normal molecule. Furthermore, we reported that the pathological changes are associated with tau phosphorylation at Ser199 and 262 and Thr212 and 231. This pathological version of tau induces subcellular mislocalization in cultured cells and neurons, and translocates into the nucleus or accumulated in the perinuclear region of cells. We have generated a transgenic mouse model that expresses pathological human tau (PH-Tau) in neurons at two different concentrations (4% and 14% of the total endogenous tau). In this model, PH-Tau causes cognitive decline by at least two different mechanisms: one that involves the cytoskeleton with axonal disruption (at high concentration), and another in which the apparent neuronal morphology is not grossly affected, but the synaptic terminals are altered (at lower concentration). We will discuss the putative involvement of tau in proteostasis under these conditions. Understanding tau’s biological activity on and off the microtubules will help shed light to the mechanism of neurodegeneration and of normal neuronal function.
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Affiliation(s)
- Alejandra D Alonso
- Department of Biology and Center for Developmental Neuroscience, College of Staten Island, The City University of New York, Staten Island, NY, United States.,Biology Program, The Graduate Center, The City University of New York, New York, NY, United States.,Biochemistry Program, The Graduate Center, The City University of New York, New York, NY, United States
| | - Leah S Cohen
- Department of Biology and Center for Developmental Neuroscience, College of Staten Island, The City University of New York, Staten Island, NY, United States
| | - Christopher Corbo
- Department of Biology, Wagner College, Staten Island, NY, United States
| | - Viktoriya Morozova
- Department of Biology and Center for Developmental Neuroscience, College of Staten Island, The City University of New York, Staten Island, NY, United States.,Biology Program, The Graduate Center, The City University of New York, New York, NY, United States
| | - Abdeslem ElIdrissi
- Department of Biology and Center for Developmental Neuroscience, College of Staten Island, The City University of New York, Staten Island, NY, United States.,Biology Program, The Graduate Center, The City University of New York, New York, NY, United States
| | - Greg Phillips
- Department of Biology and Center for Developmental Neuroscience, College of Staten Island, The City University of New York, Staten Island, NY, United States.,Biology Program, The Graduate Center, The City University of New York, New York, NY, United States
| | - Frida E Kleiman
- Biochemistry Program, The Graduate Center, The City University of New York, New York, NY, United States.,Department of Chemistry, Hunter College, The City University of New York, New York, NY, United States
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17
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Sarnataro D. Attempt to Untangle the Prion-Like Misfolding Mechanism for Neurodegenerative Diseases. Int J Mol Sci 2018; 19:ijms19103081. [PMID: 30304819 PMCID: PMC6213118 DOI: 10.3390/ijms19103081] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/01/2018] [Accepted: 10/05/2018] [Indexed: 12/15/2022] Open
Abstract
The misfolding and aggregation of proteins is the neuropathological hallmark for numerous diseases including Alzheimer's disease, Parkinson's disease, and prion diseases. It is believed that misfolded and abnormal β-sheets forms of wild-type proteins are the vectors of these diseases by acting as seeds for the aggregation of endogenous proteins. Cellular prion protein (PrPC) is a glycosyl-phosphatidyl-inositol (GPI) anchored glycoprotein that is able to misfold to a pathogenic isoform PrPSc, the causative agent of prion diseases which present as sporadic, dominantly inherited and transmissible infectious disorders. Increasing evidence highlights the importance of prion-like seeding as a mechanism for pathological spread in Alzheimer's disease and Tauopathy, as well as other neurodegenerative disorders. Here, we report the latest findings on the mechanisms controlling protein folding, focusing on the ER (Endoplasmic Reticulum) quality control of GPI-anchored proteins and describe the "prion-like" properties of amyloid-β and tau assemblies. Furthermore, we highlight the importance of pathogenic assemblies interaction with protein and lipid membrane components and their implications in both prion and Alzheimer's diseases.
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Affiliation(s)
- Daniela Sarnataro
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, School of Medicine, Via S. Pansini 5, 80131 Naples, Italy.
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18
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Rossi G, Redaelli V, Contiero P, Fabiano S, Tagliabue G, Perego P, Benussi L, Bruni AC, Filippini G, Farinotti M, Giaccone G, Buiatiotis S, Manzoni C, Ferrari R, Tagliavini F. Tau Mutations Serve as a Novel Risk Factor for Cancer. Cancer Res 2018; 78:3731-3739. [PMID: 29794074 DOI: 10.1158/0008-5472.can-17-3175] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 02/23/2018] [Accepted: 05/04/2018] [Indexed: 11/16/2022]
Abstract
In addition to its well-recognized role in neurodegeneration, tau participates in maintenance of genome stability and chromosome integrity. In particular, peripheral cells from patients affected by frontotemporal lobar degeneration carrying a mutation in tau gene (genetic tauopathies), as well as cells from animal models, show chromosome numerical and structural aberrations, chromatin anomalies, and a propensity toward abnormal recombination. As genome instability is tightly linked to cancer development, we hypothesized that mutated tau may be a susceptibility factor for cancer. Here we conducted a retrospective cohort study comparing cancer incidence in families affected by genetic tauopathies to control families. In addition, we carried out a bioinformatics analysis to highlight pathways associated with the tau protein interactome. We report that the risk of developing cancer is significantly higher in families affected by genetic tauopathies, and a high proportion of tau protein interactors are involved in cellular processes particularly relevant to cancer. These findings disclose a novel role of tau as a risk factor for cancer, providing new insights in the various pathologic roles of mutated tau.Significance: This study reveals a novel role for tau as a risk factor for cancer, providing new insights beyond its role in neurodegeneration. Cancer Res; 78(13); 3731-9. ©2018 AACR.
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Affiliation(s)
- Giacomina Rossi
- Unit of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy.
| | - Veronica Redaelli
- Unit of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Paolo Contiero
- Environmental Epidemiology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, Italy
| | - Sabrina Fabiano
- Cancer Registry Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, Italy
| | - Giovanna Tagliabue
- Cancer Registry Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, Italy
| | - Paola Perego
- Molecular Pharmacology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, Italy
| | - Luisa Benussi
- NeuroBioGen Lab-Memory Clinic, IRCCS Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy
| | - Amalia C Bruni
- Regional Neurogenetic Centre, ASPCZ, Lamezia Terme, Italy
| | - Graziella Filippini
- Scientific Directorate, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Mariangela Farinotti
- Neuroepidemiology - Scientific Directorate, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Giorgio Giaccone
- Unit of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | | | - Claudia Manzoni
- School of Pharmacy, University of Reading, Whiteknights, Reading, United Kingdom.,Department of Molecular Neuroscience, UCL Institute of Neurology, London, United Kingdom
| | - Raffaele Ferrari
- Department of Molecular Neuroscience, UCL Institute of Neurology, London, United Kingdom
| | - Fabrizio Tagliavini
- Scientific Directorate, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
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19
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Tamagno E, Guglielmotto M, Monteleone D, Manassero G, Vasciaveo V, Tabaton M. The Unexpected Role of Aβ1-42 Monomers in the Pathogenesis of Alzheimer's Disease. J Alzheimers Dis 2018; 62:1241-1245. [PMID: 29103036 PMCID: PMC5870015 DOI: 10.3233/jad-170581] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Amyloid-β (Aβ) has been proposed as a biomarker and a drug target for the therapy of Alzheimer's disease (AD). The neurotoxic entity and relevance of each conformational form of Aβ to AD pathology is still under debate; Aβ oligomers are considered the major killer form of the peptide whereas monomers have been proposed to be involved in physiological process. Here we reviewed some different effects mediated by monomers and oligomers on mechanisms involved in AD pathogenesis such as autophagy and tau aggregation. Data reported in this review demonstrate that Aβ monomers could have a major role in sustaining the pathogenesis of AD and that AD therapy should be focused not only in the removal of oligomers but also of monomers.
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Affiliation(s)
- Elena Tamagno
- Department of Neuroscience, University of Torino, Torino, Italy,Neuroscience Institute of Cavalieri Ottolenghi Foundation (NICO), University of Torino, Torino, Italy
| | - Michela Guglielmotto
- Department of Neuroscience, University of Torino, Torino, Italy,Neuroscience Institute of Cavalieri Ottolenghi Foundation (NICO), University of Torino, Torino, Italy
| | - Debora Monteleone
- Department of Neuroscience, University of Torino, Torino, Italy,Neuroscience Institute of Cavalieri Ottolenghi Foundation (NICO), University of Torino, Torino, Italy
| | - Giusi Manassero
- Department of Neuroscience, University of Torino, Torino, Italy,Neuroscience Institute of Cavalieri Ottolenghi Foundation (NICO), University of Torino, Torino, Italy
| | - Valeria Vasciaveo
- Department of Neuroscience, University of Torino, Torino, Italy,Neuroscience Institute of Cavalieri Ottolenghi Foundation (NICO), University of Torino, Torino, Italy
| | - Massimo Tabaton
- Department of Internal Medicine and Medical Specialties (DIMI), Unit of Geriatric Medicine, University of Genova, Genova, Italy,Correspondence to: Dr. Massimo Tabaton, Department of Internal Medicine and Medical Specialities (DIMI) Viale Benedetto XV, 6,16132, Genova, Italy. Tel./Fax: +390103537064; E-mail:
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20
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Prezel E, Elie A, Delaroche J, Stoppin-Mellet V, Bosc C, Serre L, Fourest-Lieuvin A, Andrieux A, Vantard M, Arnal I. Tau can switch microtubule network organizations: from random networks to dynamic and stable bundles. Mol Biol Cell 2017; 29:154-165. [PMID: 29167379 PMCID: PMC5909928 DOI: 10.1091/mbc.e17-06-0429] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 11/08/2017] [Accepted: 11/13/2017] [Indexed: 11/11/2022] Open
Abstract
Tau is a neuronal microtubule bundler that is known to stabilize microtubules by promoting their growth and inhibiting their shrinkage. This study reveals novel mechanisms by which tau is able to switch microtubule network organizations via the differential regulation of microtubule bundling and dynamics. In neurons, microtubule networks alternate between single filaments and bundled arrays under the influence of effectors controlling their dynamics and organization. Tau is a microtubule bundler that stabilizes microtubules by stimulating growth and inhibiting shrinkage. The mechanisms by which tau organizes microtubule networks remain poorly understood. Here, we studied the self-organization of microtubules growing in the presence of tau isoforms and mutants. The results show that tau’s ability to induce stable microtubule bundles requires two hexapeptides located in its microtubule-binding domain and is modulated by its projection domain. Site-specific pseudophosphorylation of tau promotes distinct microtubule organizations: stable single microtubules, stable bundles, or dynamic bundles. Disease-related tau mutations increase the formation of highly dynamic bundles. Finally, cryo–electron microscopy experiments indicate that tau and its variants similarly change the microtubule lattice structure by increasing both the protofilament number and lattice defects. Overall, our results uncover novel phosphodependent mechanisms governing tau’s ability to trigger microtubule organization and reveal that disease-related modifications of tau promote specific microtubule organizations that may have a deleterious impact during neurodegeneration.
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Affiliation(s)
- Elea Prezel
- Inserm, U1216, Université Grenoble Alpes.,Grenoble Institut des Neurosciences, Université Grenoble Alpes
| | - Auréliane Elie
- Inserm, U1216, Université Grenoble Alpes.,Grenoble Institut des Neurosciences, Université Grenoble Alpes
| | - Julie Delaroche
- Inserm, U1216, Université Grenoble Alpes.,Grenoble Institut des Neurosciences, Université Grenoble Alpes
| | - Virginie Stoppin-Mellet
- Inserm, U1216, Université Grenoble Alpes.,Grenoble Institut des Neurosciences, Université Grenoble Alpes
| | - Christophe Bosc
- Inserm, U1216, Université Grenoble Alpes.,Grenoble Institut des Neurosciences, Université Grenoble Alpes
| | - Laurence Serre
- Inserm, U1216, Université Grenoble Alpes.,Grenoble Institut des Neurosciences, Université Grenoble Alpes.,Centre National de la Recherche Scientifique, Grenoble Institut des Neurosci ences, Institut de Biosciences et Biotechnologies de Grenoble, F-38000 Grenoble, France
| | - Anne Fourest-Lieuvin
- Inserm, U1216, Université Grenoble Alpes.,Grenoble Institut des Neurosciences, Université Grenoble Alpes.,Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biosciences et Biotechnologies de Grenoble, F-38000 Grenoble, France
| | - Annie Andrieux
- Inserm, U1216, Université Grenoble Alpes.,Grenoble Institut des Neurosciences, Université Grenoble Alpes.,Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biosciences et Biotechnologies de Grenoble, F-38000 Grenoble, France
| | - Marylin Vantard
- Inserm, U1216, Université Grenoble Alpes.,Grenoble Institut des Neurosciences, Université Grenoble Alpes.,Centre National de la Recherche Scientifique, Grenoble Institut des Neurosci ences, Institut de Biosciences et Biotechnologies de Grenoble, F-38000 Grenoble, France
| | - Isabelle Arnal
- Inserm, U1216, Université Grenoble Alpes .,Grenoble Institut des Neurosciences, Université Grenoble Alpes.,Centre National de la Recherche Scientifique, Grenoble Institut des Neurosci ences, Institut de Biosciences et Biotechnologies de Grenoble, F-38000 Grenoble, France
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21
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Abstract
Tau is an intrinsically disordered protein with an important role in maintaining the dynamic instability of neuronal microtubules. Despite intensive study, a detailed understanding of the functional mechanism of tau is lacking. Here, we address this deficiency by using intramolecular single-molecule Förster Resonance Energy Transfer (smFRET) to characterize the conformational ensemble of tau bound to soluble tubulin heterodimers. Tau adopts an open conformation on binding tubulin, in which the long-range contacts between both termini and the microtubule binding region that characterize its compact solution structure are diminished. Moreover, the individual repeats within the microtubule binding region that directly interface with tubulin expand to accommodate tubulin binding, despite a lack of extension in the overall dimensions of this region. These results suggest that the disordered nature of tau provides the significant flexibility required to allow for local changes in conformation while preserving global features. The tubulin-associated conformational ensemble is distinct from its aggregation-prone one, highlighting differences between functional and dysfunctional states of tau. Using constraints derived from our measurements, we construct a model of tubulin-bound tau, which draws attention to the importance of the role of tau's conformational plasticity in function.
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22
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Manassero G, Guglielmotto M, Zamfir R, Borghi R, Colombo L, Salmona M, Perry G, Odetti P, Arancio O, Tamagno E, Tabaton M. Beta-amyloid 1-42 monomers, but not oligomers, produce PHF-like conformation of Tau protein. Aging Cell 2016; 15:914-23. [PMID: 27406053 PMCID: PMC5013016 DOI: 10.1111/acel.12500] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/03/2016] [Indexed: 01/14/2023] Open
Abstract
The mechanistic relationship between amyloid β1-42 (Aβ1-42) and the alteration of Tau protein are debated. We investigated the effect of Aβ1-42 monomers and oligomers on Tau, using mice expressing wild-type human Tau that do not spontaneously develop Tau pathology. After intraventricular injection of Aβ1-42, mice were sacrificed after 3 h or 4 days. The short-lasting treatment with Aβ monomers, but not oligomers, showed a conformational PHF-like change of Tau, together with hyperphosphorylation. The same treatment induced increase in concentration of GSK3 and MAP kinases. The inhibition of the kinases rescued the Tau changes. Aβ monomers increased the levels of total Tau, through the inhibition of proteasomal degradation. Aβ oligomers reproduced all the aforementioned alterations only after 4 days of treatment. It is known that Aβ1-42 monomers foster synaptic activity. Our results suggest that Aβ monomers physiologically favor Tau activity and dendritic sprouting, whereas their excess causes Tau pathology. Moreover, our study indicates that anti-Aβ therapies should be targeted to Aβ1-42 monomers too.
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Affiliation(s)
- Giusi Manassero
- Department of Neuroscience University of Torino via Cherasco 15 10126 Torino Italy
- Neuroscience Institute of Cavalieri Ottolenghi Foundation (NICO) University of Torino Regione Gonzole 1010043 OrbassanoTorino Italy
- Unit of Geriatric Medicine Department of Internal Medicine and Medical Specialties (DIMI) University of Genova Viale Benedetto XV, 616132 Genova Italy
| | - Michela Guglielmotto
- Department of Neuroscience University of Torino via Cherasco 15 10126 Torino Italy
- Neuroscience Institute of Cavalieri Ottolenghi Foundation (NICO) University of Torino Regione Gonzole 1010043 OrbassanoTorino Italy
| | - Raluca Zamfir
- Neuroscience Institute of Cavalieri Ottolenghi Foundation (NICO) University of Torino Regione Gonzole 1010043 OrbassanoTorino Italy
| | - Roberta Borghi
- Unit of Geriatric Medicine Department of Internal Medicine and Medical Specialties (DIMI) University of Genova Viale Benedetto XV, 616132 Genova Italy
| | - Laura Colombo
- Department of Molecular Biochemistry and Pharmacology IRCCS‐Istituto di Ricerche Farmacologiche ‘Mario Negri’ Via Giuseppe La Masa 19, 20156 Milan Italy
| | - Mario Salmona
- Department of Molecular Biochemistry and Pharmacology IRCCS‐Istituto di Ricerche Farmacologiche ‘Mario Negri’ Via Giuseppe La Masa 19, 20156 Milan Italy
| | - George Perry
- College of Sciences The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Patrizio Odetti
- Unit of Geriatric Medicine Department of Internal Medicine and Medical Specialties (DIMI) University of Genova Viale Benedetto XV, 616132 Genova Italy
- IRCCS San Martino‐IST University of Genova Viale Benedetto XV, 616132 Genova Italy
| | - Ottavio Arancio
- Department of Pathology and Cell Biology Taub Institute for Research on Alzheimer's Disease and the Aging Brain Columbia University 630 West 168th Street, P&S 12‐420D New York NY 10032 USA
| | - Elena Tamagno
- Department of Neuroscience University of Torino via Cherasco 15 10126 Torino Italy
- Neuroscience Institute of Cavalieri Ottolenghi Foundation (NICO) University of Torino Regione Gonzole 1010043 OrbassanoTorino Italy
| | - Massimo Tabaton
- Unit of Geriatric Medicine Department of Internal Medicine and Medical Specialties (DIMI) University of Genova Viale Benedetto XV, 616132 Genova Italy
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23
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Duchnowska R, Jarząb M, Żebracka-Gala J, Matkowski R, Kowalczyk A, Radecka B, Kowalska M, Pfeifer A, Foszczyńska-Kłoda M, Musolino A, Czartoryska-Arłukowicz B, Litwiniuk M, Surus-Hyla A, Szabłowska-Siwik S, Karczmarek-Borowska B, Dębska-Szmich S, Głodek-Sutek B, Sosińska-Mielcarek K, Chmielowska E, Kalinka-Warzocha E, Olszewski WP, Patera J, Żawrocki A, Pliszka A, Tyszkiewicz T, Rusinek D, Oczko-Wojciechowska M, Jassem J, Biernat W. Brain Metastasis Prediction by Transcriptomic Profiling in Triple-Negative Breast Cancer. Clin Breast Cancer 2016; 17:e65-e75. [PMID: 27692773 DOI: 10.1016/j.clbc.2016.08.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 08/14/2016] [Accepted: 08/25/2016] [Indexed: 12/14/2022]
Abstract
BACKGROUND Triple-negative breast cancer (TNBC) lacks expression of steroid hormone receptors (estrogen receptor α and progesterone) and epidermal growth factor receptor type 2. This phenotype shows high metastatic potential, with particular predilection to lungs and brain. Determination of TNBC transcriptomic profiles associated with high risk of brain metastasis (BM) might identify patients requiring alternative, more aggressive, or specific preventive and therapeutic approaches. PATIENTS AND METHODS Using a cDNA-mediated annealing, selection, extension, and ligation assay, we investigated expression of 29,369 gene transcripts in primary TNBC tumor samples from 119 patients-71 in discovery cohort A and 48 in independent cohort B-that included best discriminating genes. Expression of mRNA was correlated with the occurrence of symptomatic BM. RESULTS In cohort A, the difference at the noncorrected P < .005 was found for 64 transcripts (P = .23 for global test), but none showed significant difference at a preset level of false-discovery rate of < 10%. Of the 30 transcripts with the largest differences between patients with and without BM in cohort A, none was significantly associated with BM in cohort B. CONCLUSION Analysis based on the primary tumor gene transcripts alone is unlikely to predict BM development in advanced TNBC. Despite its negative findings, the study adds to the knowledge on the biology of TNBC and paves the way for future projects using more advanced molecular assays.
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Affiliation(s)
- Renata Duchnowska
- Department of Oncology, Military Institute of Medicine, Warsaw, Poland.
| | - Michał Jarząb
- 3rd Department of Radiotherapy and Chemotherapy, Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Poland
| | - Jadwiga Żebracka-Gala
- Laboratory of Molecular Diagnostics and Functional Genomics, Department of Nuclear Medicine and Endocrine Oncology, Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Poland
| | - Rafał Matkowski
- Department of Oncology, Wroclaw Medical University, Wrocław, Poland
| | - Anna Kowalczyk
- Department of Oncology and Radiotherapy, Medical University of Gdańsk, Gdańsk, Poland
| | | | - Małgorzata Kowalska
- Laboratory of Molecular Diagnostics and Functional Genomics, Department of Nuclear Medicine and Endocrine Oncology, Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Poland
| | - Aleksandra Pfeifer
- Laboratory of Molecular Diagnostics and Functional Genomics, Department of Nuclear Medicine and Endocrine Oncology, Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Poland
| | | | | | | | - Maria Litwiniuk
- Department of Oncology, Greater Poland Cancer Center, Poznań, Poland
| | - Anna Surus-Hyla
- Department of Oncology, Warmia and Masuria Oncology Center, Olsztyn, Poland
| | | | | | | | | | | | | | | | - Wojciech P Olszewski
- Department of Pathology and Laboratory Diagnostic, Oncology Center-Institute, Warsaw, Poland
| | - Janusz Patera
- Department of Pathology, Military Institute of Medicine, Warsaw, Poland
| | - Anton Żawrocki
- Department of Pathology, Medical University of Gdańsk, Gdańsk, Poland
| | - Agnieszka Pliszka
- Department of Oncology and Radiotherapy, Medical University of Gdańsk, Gdańsk, Poland
| | - Tomasz Tyszkiewicz
- Laboratory of Molecular Diagnostics and Functional Genomics, Department of Nuclear Medicine and Endocrine Oncology, Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Poland
| | - Dagmara Rusinek
- Laboratory of Molecular Diagnostics and Functional Genomics, Department of Nuclear Medicine and Endocrine Oncology, Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Poland
| | - Małgorzata Oczko-Wojciechowska
- Laboratory of Molecular Diagnostics and Functional Genomics, Department of Nuclear Medicine and Endocrine Oncology, Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Poland
| | - Jacek Jassem
- Department of Oncology and Radiotherapy, Medical University of Gdańsk, Gdańsk, Poland
| | - Wojciech Biernat
- Department of Pathology, Medical University of Gdańsk, Gdańsk, Poland
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24
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Arendt T, Stieler JT, Holzer M. Tau and tauopathies. Brain Res Bull 2016; 126:238-292. [DOI: 10.1016/j.brainresbull.2016.08.018] [Citation(s) in RCA: 333] [Impact Index Per Article: 41.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 08/31/2016] [Accepted: 08/31/2016] [Indexed: 12/11/2022]
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25
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Alonso AD, Beharry C, Corbo CP, Cohen LS. Molecular mechanism of prion-like tau-induced neurodegeneration. Alzheimers Dement 2016; 12:1090-1097. [PMID: 27126544 DOI: 10.1016/j.jalz.2015.12.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 10/30/2015] [Accepted: 12/18/2015] [Indexed: 01/16/2023]
Abstract
INTRODUCTION Accumulation of hyperphosphorylated tau and the disruption of microtubules are correlated with synaptic loss and pathology of Alzheimer's disease (AD). Impaired cognitive function and pathology of AD is correlated with this lesion. This review looks at the mechanism of neurodegeneration, the prion-like behavior of tau in its interaction with normal MAPs in correlation with tau hyperphosphorylation. METHODS We reviewed our work in the field as well as current literature that pertains to tau phosphorylation and the biological effects. RESULTS Hyperphosphorylation of tau in AD, in vitro, in cells, or in animal models converts this protein into a prion-like protein that is able to propagate the altered conformation. DISCUSSION These findings suggest that phosphorylation of tau is a critical event in neurodegeneration. The combination of phosphorylation sites can generate a gain of toxic function for tau. The mechanism of tau toxicity might involve not only the microtubule system but also interference with other cellular compartments such as the nucleus and the actin cytoskeleton.
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Affiliation(s)
- Alejandra D Alonso
- Department of Biology and Center for Developmental Neuroscience, College of Staten Island, Graduate Center, The City University of New York, Staten Island, NY, USA.
| | - Cindy Beharry
- Department of Biology and Center for Developmental Neuroscience, College of Staten Island, Graduate Center, The City University of New York, Staten Island, NY, USA
| | | | - Leah S Cohen
- Department of Biology and Center for Developmental Neuroscience, College of Staten Island, Graduate Center, The City University of New York, Staten Island, NY, USA
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26
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Yu D, Feinstein SC, Valentine MT. Effects of wild type tau and disease-linked tau mutations on microtubule organization and intracellular trafficking. J Biomech 2015; 49:1280-1285. [PMID: 26674472 DOI: 10.1016/j.jbiomech.2015.09.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 09/23/2015] [Accepted: 09/27/2015] [Indexed: 01/17/2023]
Abstract
We investigate the effects of transient expression of wild type (WT) and disease-linked mutations of tau (R406W, P301L, ΔN296) on cytoskeletal organization and cargo transport in COS-7 cells, which are natively tau-free. The introduction of tau proteins (either WT or mutant forms) leads to a dramatic restructuring of the microtubule cytoskeleton, as observed using immunofluorescence microscopy. Yet, this microtubule bundling and aggregation has a modest effect on the speed and travel distance of motor-driven cargo transport, as measured by the motions of fluorescently-labeled lysosomes. This suggests that localized transport events are insensitive to the global structure of the microtubule cytoskeleton. Importantly, we also found no evidence that the disease-linked tau mutants were particularly toxic; in fact we found that expression of mutant and WT tau had similar effects on overall microtubule structure and transport phenotypes.
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Affiliation(s)
- Dezhi Yu
- Department of Materials, University of California, Santa Barbara, Santa Barbara, CA, USA; Neuroscience Research Institute, University of California, Santa Barbara, Santa Barbara, CA, USA
| | - Stuart C Feinstein
- Neuroscience Research Institute, University of California, Santa Barbara, Santa Barbara, CA, USA; Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA, USA
| | - Megan T Valentine
- Neuroscience Research Institute, University of California, Santa Barbara, Santa Barbara, CA, USA; Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, CA, USA.
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27
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Ng ASL, Sias AC, Pressman PS, Fong JC, Karydas AM, Zanto TP, De May M, Coppola G, Geschwind DH, Miller BL, Lee SE. Young-onset frontotemporal dementia in a homozygous tau R406W mutation carrier. Ann Clin Transl Neurol 2015; 2:1124-8. [PMID: 26734663 PMCID: PMC4693591 DOI: 10.1002/acn3.265] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 10/01/2015] [Accepted: 10/14/2015] [Indexed: 11/11/2022] Open
Abstract
Microtubule‐associated protein tau mutations result in 10–20% of cases of genetic frontotemporal lobar degeneration. Tau mutation carriers typically develop behavioral variant frontotemporal dementia with or without parkinsonism. Unlike most frontotemporal dementia gene mutations, heterozygous R406W tau mutation carriers most often develop clinical Alzheimer's disease. We report a homozygous tau R406W mutation carrier with behavioral variant frontotemporal dementia who developed symptoms 20 years before mean family symptom onset. Voxel‐based morphometry showed frontoinsular, frontal, and mesial temporal cortical atrophy. Homozygous tau R406W mutations appear to accelerate symptom onset and drive a behavioral variant frontotemporal dementia syndrome.
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Affiliation(s)
- Adeline S L Ng
- Department of Neurology National Neuroscience Institute Tan Tock Seng Hospital Novena Singapore 308433; Memory and Aging Centre Department of Neurology University of California, San Francisco San Francisco California 94158
| | - Ana C Sias
- Memory and Aging Centre Department of Neurology University of California, San Francisco San Francisco California 94158
| | - Peter S Pressman
- Memory and Aging Centre Department of Neurology University of California, San Francisco San Francisco California 94158
| | - Jamie C Fong
- Memory and Aging Centre Department of Neurology University of California, San Francisco San Francisco California 94158
| | - Anna M Karydas
- Memory and Aging Centre Department of Neurology University of California, San Francisco San Francisco California 94158
| | - Theodore P Zanto
- Department of Neurology University of California, San Francisco San Francisco California 94158
| | - Mary De May
- Memory and Aging Centre Department of Neurology University of California, San Francisco San Francisco California 94158
| | - Giovanni Coppola
- David Geffen School of Medicine University of California, Los Angeles Los Angeles California 90095
| | - Daniel H Geschwind
- David Geffen School of Medicine University of California, Los Angeles Los Angeles California 90095
| | - Bruce L Miller
- Memory and Aging Centre Department of Neurology University of California, San Francisco San Francisco California 94158
| | - Suzee E Lee
- Memory and Aging Centre Department of Neurology University of California, San Francisco San Francisco California 94158
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28
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Rossi G, Tagliavini F. Frontotemporal lobar degeneration: old knowledge and new insight into the pathogenetic mechanisms of tau mutations. Front Aging Neurosci 2015; 7:192. [PMID: 26528178 PMCID: PMC4604311 DOI: 10.3389/fnagi.2015.00192] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Accepted: 09/22/2015] [Indexed: 12/11/2022] Open
Abstract
Frontotemporal lobar degeneration (FTLD) is a group of heterogeneous neurodegenerative diseases which includes tauopathies. In the central nervous system (CNS) tau is the major microtubule-associated protein (MAP) of neurons, promoting assembly and stabilization of microtubules (MTs) required for morphogenesis and axonal transport. Primary tauopathies are characterized by deposition of abnormal fibrils of tau in neuronal and glial cells, leading to neuronal death, brain atrophy and eventually dementia. In genetic tauopathies mutations of tau gene impair the ability of tau to bind to MTs, alter the normal ratio among tau isoforms and favor fibril formation. Recently, additional functions have been ascribed to tau and different pathogenetic mechanisms are then emerging. In fact, a role of tau in DNA protection and genome stability has been reported and chromosome aberrations have been found associated with tau mutations. Furthermore, newly structurally and functionally characterized mutations have suggested novel pathological features, such as a tendency to form oligomeric rather than fibrillar aggregates. Tau mutations affecting axonal transport and plasma membrane interaction have also been described. In this article, we will review the pathogenetic mechanisms underlying tau mutations, focusing in particular on the less common aspects, so far poorly investigated.
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Affiliation(s)
- Giacomina Rossi
- Division of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta Milano, Italy
| | - Fabrizio Tagliavini
- Division of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta Milano, Italy
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29
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Budd Haeberlein SL, Harris TJR. Promising Targets for the Treatment of Neurodegenerative Diseases. Clin Pharmacol Ther 2015; 98:492-501. [PMID: 26250447 DOI: 10.1002/cpt.195] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 08/03/2015] [Indexed: 12/12/2022]
Abstract
Genetics and pathology have proven to be an effective combination to identify an evolving and deepening landscape of pathways and potential therapeutic targets in neurodegenerative diseases. Initially this landscape appeared to be populated with distinct therapeutic targets but with potentially overlapping mechanisms in each neurodegenerative disease. Our understanding has expanded to recognize that multiple pathologies are common in neurodegenerative disease, and that there is considerable overlap in pathways and targets driving neurodegenerative diseases. This potentially opens the way for future treatments to be indicated by tissue pathology and genetic basis rather than clinical phenotype. The potential to treat neurodegenerative disease by addressing underlying pathophysiology is still in the early days and challenges remain, especially the likely need to address pathologies early in disease. This will require redefinition of diagnosis and the tools to enable earlier diagnosis.
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Affiliation(s)
| | - T J R Harris
- Precision Medicine, Biogen, Cambridge, Massachusetts, USA
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30
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Dubey J, Ratnakaran N, Koushika SP. Neurodegeneration and microtubule dynamics: death by a thousand cuts. Front Cell Neurosci 2015; 9:343. [PMID: 26441521 PMCID: PMC4563776 DOI: 10.3389/fncel.2015.00343] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Accepted: 08/18/2015] [Indexed: 12/11/2022] Open
Abstract
Microtubules form important cytoskeletal structures that play a role in establishing and maintaining neuronal polarity, regulating neuronal morphology, transporting cargo, and scaffolding signaling molecules to form signaling hubs. Within a neuronal cell, microtubules are found to have variable lengths and can be both stable and dynamic. Microtubule associated proteins, post-translational modifications of tubulin subunits, microtubule severing enzymes, and signaling molecules are all known to influence both stable and dynamic pools of microtubules. Microtubule dynamics, the process of interconversion between stable and dynamic pools, and the proportions of these two pools have the potential to influence a wide variety of cellular processes. Reduced microtubule stability has been observed in several neurodegenerative diseases such as Alzheimer's disease (AD), Parkinson's disease (PD), Amyotrophic Lateral Sclerosis (ALS), and tauopathies like Progressive Supranuclear Palsy. Hyperstable microtubules, as seen in Hereditary Spastic Paraplegia (HSP), also lead to neurodegeneration. Therefore, the ratio of stable and dynamic microtubules is likely to be important for neuronal function and perturbation in microtubule dynamics might contribute to disease progression.
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Affiliation(s)
- Jyoti Dubey
- Department of Biological Sciences, Tata Institute of Fundamental Research Mumbai, India ; InStem Bangalore, India
| | - Neena Ratnakaran
- Department of Biological Sciences, Tata Institute of Fundamental Research Mumbai, India
| | - Sandhya P Koushika
- Department of Biological Sciences, Tata Institute of Fundamental Research Mumbai, India
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31
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Atsmon-Raz Y, Miller Y. Insight into Atomic Resolution of the Cross-Seeding between Tau/Mutated Tau and Amyloid-β in Neurodegenerative Diseases. Isr J Chem 2015. [DOI: 10.1002/ijch.201400162] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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32
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Rockenstein E, Overk CR, Ubhi K, Mante M, Patrick C, Adame A, Bisquert A, Trejo-Morales M, Spencer B, Masliah E. A novel triple repeat mutant tau transgenic model that mimics aspects of pick's disease and fronto-temporal tauopathies. PLoS One 2015; 10:e0121570. [PMID: 25803611 PMCID: PMC4372415 DOI: 10.1371/journal.pone.0121570] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 02/13/2015] [Indexed: 01/18/2023] Open
Abstract
Tauopathies are a group of disorders leading to cognitive and behavioral impairment in the aging population. While four-repeat (4R) Tau is more abundant in corticobasal degeneration, progressive supranuclear palsy, and Alzheimer’s disease, three-repeat (3R) Tau is the most abundant splice, in Pick's disease. A number of transgenic models expressing wild-type and mutant forms of the 4R Tau have been developed. However, few models of three-repeat Tau are available. A transgenic mouse model expressing three-repeat Tau was developed bearing the mutations associated with familial forms of Pick's disease (L266V and G272V mutations). Two lines expressing high (Line 13) and low (Line 2) levels of the three-repeat mutant Tau were analyzed. By Western blot, using antibodies specific to three-repeat Tau, Line 13 expressed 5-times more Tau than Line 2. The Tau expressed by these mice was most abundant in the frontal-temporal cortex and limbic system and was phosphorylated at residues detected by the PHF-1, AT8, CP9 and CP13 antibodies. The higher-expressing mice displayed hyperactivity, memory deficits in the water maze and alterations in the round beam. The behavioral deficits started at 6-8 months of age and were associated with a progressive increase in the accumulation of 3R Tau. By immunocytochemistry, mice from Line 13 displayed extensive accumulation of 3R Tau in neuronal cells bodies in the pyramidal neurons of the neocortex, CA1-3 regions, and dentate gyrus of the hippocampus. Aggregates in the granular cells had a globus appearance and mimic Pick’s-like inclusions. There were abundant dystrophic neurites, astrogliosis and synapto-dendritic damage in the neocortex and hippocampus of the higher expresser line. The hippocampal lesions were moderately argyrophilic and Thioflavin-S negative. By electron microscopy, discrete straight filament aggregates were detected in some neurons in the hippocampus. This model holds promise for better understanding the natural history and progression of 3R tauopathies and their relationship with mitochondrial alterations and might be suitable for therapeutical testing.
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Affiliation(s)
- Edward Rockenstein
- Department of Neurosciences, University of California San Diego, La Jolla, California, United States of America
| | - Cassia R. Overk
- Department of Neurosciences, University of California San Diego, La Jolla, California, United States of America
| | - Kiren Ubhi
- Department of Neurosciences, University of California San Diego, La Jolla, California, United States of America
| | - Michael Mante
- Department of Neurosciences, University of California San Diego, La Jolla, California, United States of America
| | - Christina Patrick
- Department of Neurosciences, University of California San Diego, La Jolla, California, United States of America
| | - Anthony Adame
- Department of Neurosciences, University of California San Diego, La Jolla, California, United States of America
| | - Alejandro Bisquert
- Department of Neurosciences, University of California San Diego, La Jolla, California, United States of America
| | - Margarita Trejo-Morales
- Department of Neurosciences, University of California San Diego, La Jolla, California, United States of America
| | - Brian Spencer
- Department of Neurosciences, University of California San Diego, La Jolla, California, United States of America
| | - Eliezer Masliah
- Department of Neurosciences, University of California San Diego, La Jolla, California, United States of America
- Department of Pathology, University of California San Diego, La Jolla, California, United States of America
- * E-mail:
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Abstract
Tau is a microtubule binding protein that forms pathological aggregates in the brain in Alzheimer's disease and other tauopathies. Disease etiology is thought to arise from loss of native interactions between tau and microtubules, as well as from gain of toxicity tied to tau aggregation, although neither mechanism is well understood. Here we investigate the link between function and disease using disease-associated and disease-motivated mutants of tau. We find that mutations to highly conserved proline residues in repeats 2 and 3 of the microtubule binding domain have differential effects on tau binding to tubulin and the capacity of tau to enhance tubulin polymerization. Notably, mutations to these residues result in an increased affinity for tubulin dimers while having a negligible effect on binding to stabilized microtubules. We measure conformational changes in tau on binding to tubulin that provide a structural framework for the observed altered affinity and function. Additionally, we find that these mutations do not necessarily enhance aggregation, which could have important implications for tau therapeutic strategies that focus solely on searching for tau aggregation inhibitors. We propose a model that describes tau binding to tubulin dimers and a mechanism by which disease-relevant alterations to tau impact its function. Together, these results draw attention to the interaction between tau and free tubulin as playing an important role in mechanisms of tau pathology.
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Tau protein modifications and interactions: their role in function and dysfunction. Int J Mol Sci 2014; 15:4671-713. [PMID: 24646911 PMCID: PMC3975420 DOI: 10.3390/ijms15034671] [Citation(s) in RCA: 224] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 02/11/2014] [Accepted: 03/04/2014] [Indexed: 01/29/2023] Open
Abstract
Tau protein is abundant in the central nervous system and involved in microtubule assembly and stabilization. It is predominantly associated with axonal microtubules and present at lower level in dendrites where it is engaged in signaling functions. Post-translational modifications of tau and its interaction with several proteins play an important regulatory role in the physiology of tau. As a consequence of abnormal modifications and expression, tau is redistributed from neuronal processes to the soma and forms toxic oligomers or aggregated deposits. The accumulation of tau protein is increasingly recognized as the neuropathological hallmark of a number of dementia disorders known as tauopathies. Dysfunction of tau protein may contribute to collapse of cytoskeleton, thereby causing improper anterograde and retrograde movement of motor proteins and their cargos on microtubules. These disturbances in intraneuronal signaling may compromise synaptic transmission as well as trophic support mechanisms in neurons.
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Povellato G, Tuxworth RI, Hanger DP, Tear G. Modification of the Drosophila model of in vivo Tau toxicity reveals protective phosphorylation by GSK3β. Biol Open 2014; 3:1-11. [PMID: 24429107 PMCID: PMC3892155 DOI: 10.1242/bio.20136692] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 10/29/2013] [Indexed: 01/17/2023] Open
Abstract
Hyperphosphorylation of the microtubule associated protein, Tau, is the hallmark of a group of neurodegenerative disorders known as the tauopathies which includes Alzheimer's disease. Precisely how and why Tau phosphorylation is increased in disease is not fully understood, nor how individual sites modify Tau function. Several groups have used the Drosophila visual system as an in vivo model to examine how the toxicity of Tau varies with phosphorylation status. This system relies on overexpression of Tau from transgenes but is susceptible to position effects altering expression and activity of the transgenes. We have refined the system by eliminating position effects through the use of site-specific integration. By standardising Tau expression levels we have been able to compare directly the toxicity of different isoforms of Tau and Tau point mutants that abolish important phosphorylation events. We have also examined the importance of human kinases in modulating Tau toxicity in vivo. We were able to confirm that human GSK3β phosphorylates Tau and increases toxicity but, unexpectedly, we identified that preventing phosphorylation of Ser404 is a protective event. When phosphorylation at this site is prevented, Tau toxicity in the Drosophila visual system is increased in the presence of GSK3β. Our data suggest that not all phosphorylation events on Tau are associated with toxicity.
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Affiliation(s)
- Giulia Povellato
- MRC Centre for Developmental Neurobiology, King's College London, New Hunt's House, Guy's Hospital Campus, London SE1 1UL, UK
| | - Richard I. Tuxworth
- MRC Centre for Developmental Neurobiology, King's College London, New Hunt's House, Guy's Hospital Campus, London SE1 1UL, UK
- School of Clinical and Experimental Medicine, University of Birmingham, The Medical School, Birmingham B15 2TT, UK
| | - Diane P. Hanger
- Department of Neuroscience, King's College London, Institute of Psychiatry, De Crespigny Park, London SE5 8AF, UK
| | - Guy Tear
- MRC Centre for Developmental Neurobiology, King's College London, New Hunt's House, Guy's Hospital Campus, London SE1 1UL, UK
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Rossi G, Conconi D, Panzeri E, Paoletta L, Piccoli E, Ferretti MG, Mangieri M, Ruggerone M, Dalprà L, Tagliavini F. Mutations in MAPT give rise to aneuploidy in animal models of tauopathy. Neurogenetics 2013; 15:31-40. [PMID: 24218087 PMCID: PMC3968519 DOI: 10.1007/s10048-013-0380-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Accepted: 09/30/2013] [Indexed: 12/02/2022]
Abstract
Tau is a major microtubule-associated protein in brain neurons. Its misfolding and accumulation cause neurodegenerative diseases characterized by brain atrophy and dementia, named tauopathies. Genetic forms are caused by mutations of microtubule-associated protein tau gene (MAPT). Tau is expressed also in nonneural tissues such as lymphocytes. Tau has been recently recognized as a multifunctional protein, and in particular, some findings supported a role in genome stability. In fact, peripheral cells of patients affected by frontotemporal dementia carrying different MAPT mutations showed structural and numerical chromosome aberrations. The aim of this study was to assess chromosome stability in peripheral cell from two animal models of genetic tauopathy, JNPL3 and PS19 mouse strains expressing the human tau carrying the P301L and P301S mutations, respectively, to confirm the previous data on humans. After demonstrating the presence of mutated tau in spleen, we performed standard cytogenetic analysis of splenic lymphocytes from homozygous and hemizygous JNPL3, hemizygous PS19, and relevant controls. Losses and gains of chromosomes (aneuploidy) were evaluated. We detected a significantly higher level of aneuploidy in JNPL3 and PS19 than in control mice. Moreover, in JNPL3, the aneuploidy was higher in homozygotes than in hemizygotes, demonstrating a gene dose effect, which appeared also to be age independent. Our results show that mutated tau is associated with chromosome instability. It is conceivable to hypothesize that in genetic tauopathies the aneuploidy may be present also in central nervous system, possibly contributing to neurodegeneration.
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Affiliation(s)
- Giacomina Rossi
- Division of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, 20133, Milan, Italy,
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A novel MAPT mutation, G55R, in a frontotemporal dementia patient leads to altered Tau function. PLoS One 2013; 8:e76409. [PMID: 24086739 PMCID: PMC3785453 DOI: 10.1371/journal.pone.0076409] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 08/26/2013] [Indexed: 11/19/2022] Open
Abstract
Over two dozen mutations in the gene encoding the microtubule associated protein tau cause a variety of neurodegenerative dementias known as tauopathies, including frontotemporal dementia (FTD), PSP, CBD and Pick's disease. The vast majority of these mutations map to the C-terminal region of tau possessing microtubule assembly and microtubule dynamics regulatory activities as well as the ability to promote pathological tau aggregation. Here, we describe a novel and non-conservative tau mutation (G55R) mapping to an alternatively spliced exon encoding part of the N-terminal region of the protein in a patient with the behavioral variant of FTD. Although less well understood than the C-terminal region of tau, the N-terminal region can influence both MT mediated effects as well as tau aggregation. The mutation changes an uncharged glycine to a basic arginine in the midst of a highly conserved and very acidic region. In vitro, 4-repeat G55R tau nucleates microtubule assembly more effectively than wild-type 4-repeat tau; surprisingly, this effect is tau isoform specific and is not observed in a 3-repeat G55R tau versus 3-repeat wild-type tau comparison. In contrast, the G55R mutation has no effect upon the abilities of tau to regulate MT growing and shortening dynamics or to aggregate. Additionally, the mutation has no effect upon kinesin translocation in a microtubule gliding assay. Together, (i) we have identified a novel tau mutation mapping to a mutation deficient region of the protein in a bvFTD patient, and (ii) the G55R mutation affects the ability of tau to nucleate microtubule assembly in vitro in a 4-repeat tau isoform specific manner. This altered capability could markedly affect in vivo microtubule function and neuronal cell biology. We consider G55R to be a candidate mutation for bvFTD since additional criteria required to establish causality are not yet available for assessment.
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Almeida-Souza L, Asselbergh B, De Winter V, Goethals S, Timmerman V, Janssens S. HSPB1 facilitates the formation of non-centrosomal microtubules. PLoS One 2013; 8:e66541. [PMID: 23826100 PMCID: PMC3691211 DOI: 10.1371/journal.pone.0066541] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 05/07/2013] [Indexed: 11/19/2022] Open
Abstract
The remodeling capacity of microtubules (MT) is essential for their proper function. In mammals, MTs are predominantly formed at the centrosome, but can also originate from non-centrosomal sites, a process that is still poorly understood. We here show that the small heat shock protein HSPB1 plays a role in the control of non-centrosomal MT formation. The HSPB1 expression level regulates the balance between centrosomal and non-centrosomal MTs. The HSPB1 protein can be detected specifically at sites of de novo forming non-centrosomal MTs, while it is absent from the centrosomes. In addition, we show that HSPB1 binds preferentially to the lattice of newly formed MTs in vitro, suggesting that its function occurs by stabilizing MT seeds. Our findings open new avenues for the understanding of the role of HSPB1 in the development, maintenance and protection of cells with specialized non-centrosomal MT arrays.
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Affiliation(s)
- Leonardo Almeida-Souza
- Department of Molecular Genetics, VIB and University of Antwerp, Antwerpen, Belgium
- Neurogenetics Laboratory, Institute Born Bunge, University of Antwerp, Antwerpen, Belgium
| | - Bob Asselbergh
- Department of Molecular Genetics, VIB and University of Antwerp, Antwerpen, Belgium
- Neurogenetics Laboratory, Institute Born Bunge, University of Antwerp, Antwerpen, Belgium
| | - Vicky De Winter
- Department of Molecular Genetics, VIB and University of Antwerp, Antwerpen, Belgium
- Neurogenetics Laboratory, Institute Born Bunge, University of Antwerp, Antwerpen, Belgium
| | - Sofie Goethals
- Department of Molecular Genetics, VIB and University of Antwerp, Antwerpen, Belgium
- Neurogenetics Laboratory, Institute Born Bunge, University of Antwerp, Antwerpen, Belgium
| | - Vincent Timmerman
- Department of Molecular Genetics, VIB and University of Antwerp, Antwerpen, Belgium
- Neurogenetics Laboratory, Institute Born Bunge, University of Antwerp, Antwerpen, Belgium
- * E-mail: (VT); (SJ)
| | - Sophie Janssens
- Department of Molecular Genetics, VIB and University of Antwerp, Antwerpen, Belgium
- GROUP-ID Consortium, Laboratory for Immunoregulation and Mucosal Immunology, University of Ghent, Ghent, Belgium
- Department of Molecular Biomedical Research, VIB, Ghent, Belgium
- * E-mail: (VT); (SJ)
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Breuzard G, Hubert P, Nouar R, De Bessa T, Devred F, Barbier P, Sturgis JN, Peyrot V. Molecular mechanisms of Tau binding to microtubules and its role in microtubule dynamics in live cells. J Cell Sci 2013; 126:2810-9. [PMID: 23659998 DOI: 10.1242/jcs.120832] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Despite extensive studies, the molecular mechanisms of Tau binding to microtubules (MTs) and its consequences on MT stability still remain unclear. It is especially true in cells where the spatiotemporal distribution of Tau-MT interactions is unknown. Using Förster resonance energy transfer (FRET), we showed that the Tau-MT interaction was distributed along MTs in periodic hotspots of high and low FRET intensities. Fluorescence recovery after photobleaching (FRAP) revealed a two-phase exchange of Tau with MTs as a rapid diffusion followed by a slower binding phase. A real-time FRET assay showed that high FRET occurred simultaneously with rescue and pause transitions at MT ends. To further explore the functional interaction of Tau with MTs, the binding of paclitaxel (PTX), tubulin acetylation induced by trichostatin A (TSA), and the expression of non-acetylatable tubulin were used. With PTX and TSA, FRAP curves best fitted a single phase with a long time constant, whereas with non-acetylatable α-tubulin, curves best fitted a two phase recovery. Upon incubation with PTX and TSA, the number of high and low FRET hotspots decreased by up to 50% and no hotspot was observed during rescue and pause transitions. In the presence of non-acetylatable α-tubulin, a 34% increase in low FRET hotspots occurred, and our real-time FRET assay revealed that low FRET hotspots appeared with MTs recovering growth. In conclusion, we have identified, by FRET and FRAP, a discrete Tau-MT interaction, in which Tau could induce conformational changes of MTs, favoring recovery of MT self-assembly.
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Affiliation(s)
- Gilles Breuzard
- Aix-Marseille Université, Inserm, CRO2 UMR_S 911, Faculté de Pharmacie 13385, Marseille, France.
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40
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Abstract
Neurodegenerative dementias are characterized by elevated myoinositol and decreased N-acetylaspartate (NAA) levels. The increase in myoinositol seems to precede decreasing NAA levels in Alzheimer's diseases. NAA/myo-inositol ratio in the posterior cingulate gyri decreases with increasing burden of Alzheimer's disease pathologic conditions. Proton magnetic resonance spectroscopy ((1)H MRS) is sensitive to the pathophysiologic processes associated with the risk of dementia in patients with mild cognitive impairment. Although significant progress has been made in improving the acquisition and analysis techniques in (1)H MRS, translation of these technical developments to clinical practice have not been effective because of the lack of standardization for multisite applications and normative data and an insufficient understanding of the pathologic basis of (1)H MRS metabolite changes.
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41
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Nouar R, Devred F, Breuzard G, Peyrot V. FRET and FRAP imaging: approaches to characterise tau and stathmin interactions with microtubules in cells. Biol Cell 2013; 105:149-61. [PMID: 23312015 DOI: 10.1111/boc.201200060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 01/09/2013] [Indexed: 12/13/2022]
Abstract
Microtubules (MTs) are involved in many crucial processes such as cell morphogenesis, mitosis and motility. These dynamic structures resulting from the complex assembly of tubulin are tightly regulated by stabilising MT-associated proteins (MAPs) such as tau and destabilising proteins, notably stathmin. Because of their key role, these MAPs and their interactions have been extensively studied using biochemical and biophysical approaches, particularly in vitro. Nevertheless, numerous questions remain unanswered and the mechanisms of interaction between MT and these proteins are still unclear in cells. Techniques coupling cell imaging and fluorescence methods, such as Förster resonance energy transfer and fluorescence recovery after photobleaching, are excellent tools to study these interactions in situ. After describing these methods, we will present emblematic data from the literature and unpublished experimental results from our laboratory concerning the interactions between MTs, tau and stathmin in cells.
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Affiliation(s)
- Roqiya Nouar
- INSERM UMR 911, Aix-Marseille Université, CRO2, 13385, Marseille, France
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42
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Dadras A, Riazi GH, Afrasiabi A, Naghshineh A, Ghalandari B, Mokhtari F. In vitro study on the alterations of brain tubulin structure and assembly affected by magnetite nanoparticles. J Biol Inorg Chem 2013; 18:357-69. [DOI: 10.1007/s00775-013-0980-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Accepted: 01/18/2013] [Indexed: 11/28/2022]
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43
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Cárdenas AM, Ardiles AO, Barraza N, Baéz-Matus X, Caviedes P. Role of tau protein in neuronal damage in Alzheimer's disease and Down syndrome. Arch Med Res 2012; 43:645-54. [PMID: 23142525 DOI: 10.1016/j.arcmed.2012.10.012] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 10/22/2012] [Indexed: 01/09/2023]
Abstract
Neurodegenerative disorders constitute a growing concern worldwide. Their incidence has increased steadily, in particular among the elderly, a high-risk population that is becoming an important segment of society. Neurodegenerative mechanisms underlie many ailments such as Parkinson's disease, Huntington's disease, Alzheimer's disease (AD) and Down syndrome (DS, trisomy 21). Interestingly, there is increasing evidence suggesting that many such diseases share pathogenic mechanisms at the cellular and subcellular levels. These include altered protein misfolding, impaired autophagy, mitochondrial dysfunction, membrane damage, and altered axonal transport. Regarding AD and DS, the first common link comes from observations that DS patients undergo AD-like pathology early in adulthood. Also, the gene encoding for the amyloid precursor protein is present in human autosome 21 and in murine chromosome 16, an animal model of DS. Important functions related to preservation of normal neuronal architecture are impaired in both conditions. In particular, the stable assembly of microtubules, which is critical for the cytoskeleton, is impaired in AD and DS. In this process, tau protein plays a pivotal role in controlling microtubule stability. Abnormal tau expression and hyperphosphorylation are common features in both conditions, yet the mechanisms leading to these phenomena remain obscure. In the present report we review possible common mechanisms that may alter tau expression and function, in particular in relation to the effect of certain overexpressed DS-related genes, using cellular models of human DS. The latter contributes to the identification of possible therapeutic targets that could aid in the treatment of both AD and DS.
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Affiliation(s)
- Ana M Cárdenas
- Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile.
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44
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A New Link to Mitochondrial Impairment in Tauopathies. Mol Neurobiol 2012; 46:205-16. [DOI: 10.1007/s12035-012-8308-3] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 07/12/2012] [Indexed: 10/28/2022]
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45
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Himmelstein DS, Ward SM, Lancia JK, Patterson KR, Binder LI. Tau as a therapeutic target in neurodegenerative disease. Pharmacol Ther 2012; 136:8-22. [PMID: 22790092 DOI: 10.1016/j.pharmthera.2012.07.001] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Accepted: 06/22/2012] [Indexed: 01/16/2023]
Abstract
Tau is a microtubule-associated protein thought to help modulate the stability of neuronal microtubules. In tauopathies, including Alzheimer's disease and several frontotemporal dementias, tau is abnormally modified and misfolded resulting in its disassociation from microtubules and the generation of pathological lesions characteristic for each disease. A recent surge in the population of people with neurodegenerative tauopathies has highlighted the immense need for disease-modifying therapies for these conditions, and new attention has focused on tau as a potential target for intervention. In the current work we summarize evidence linking tau to disease pathogenesis and review recent therapeutic approaches aimed at ameliorating tau dysfunction. The primary therapeutic tactics considered include kinase inhibitors and phosphatase activators, immunotherapies, small molecule inhibitors of protein aggregation, and microtubule-stabilizing agents. Although the evidence for tau-based treatments is encouraging, additional work is undoubtedly needed to optimize each treatment strategy for the successful development of safe and effective therapeutics.
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Affiliation(s)
- Diana S Himmelstein
- Department of Cell and Molecular Biology, Feinberg School of Medicine, Northwestern University, Tarry 8-754, 300 E. Superior St., Chicago, IL 60611, USA
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Nakayama T, Kamiguchi H, Akagawa K. Syntaxin 1C, a soluble form of syntaxin, attenuates membrane recycling by destabilizing microtubules. J Cell Sci 2012; 125:817-30. [PMID: 22421360 DOI: 10.1242/jcs.081943] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Syntaxin 1C (STX1C), produced by alternative splicing of the stx1A gene, is a soluble syntaxin lacking a SNARE domain and a transmembrane domain. It is unclear how soluble syntaxin can control intracellular membrane trafficking. We found that STX1C affected microtubule (MT) dynamics through its tubulin-binding domain (TBD) and regulated recycling of intracellular vesicles carrying glucose transporter-1 (GLUT1). We demonstrated that the amino acid sequence VRSK of the TBD was important for the interaction between STX1C and tubulin and that wild-type STX1C (STX1C-WT), but not the TBD mutant, reduced the V(max) of glucose transport and GLUT1 translocation to the plasma membrane in FRSK cells. Moreover, by time-lapse analysis, we revealed that STX1C-WT suppressed MT stability and vesicle-transport motility in cells expressing GFP-α-tubulin, whereas TBD mutants had no effect. We also identified that GLUT1 was recycled in the 45 minutes after endocytosis and that GLUT1 vesicles moved along with MTs. Finally, we showed, by a recycling assay and FCM analysis, that STX1C-WT delayed the recycling phase of GLUT1 to PM, without affecting the endocytotic process of GLUT1. These data indicate that STX1C delays the GLUT1 recycling phase by suppressing MT stability and vesicle-transport motility through its TBD, providing the first insight into how soluble syntaxin controls membrane trafficking.
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Affiliation(s)
- Takahiro Nakayama
- Department of Cell Physiology, Kyorin University School of Medicine, Tokyo, 181-8611, Japan.
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Age-dependent axonal transport and locomotor changes and tau hypophosphorylation in a “P301L” tau knockin mouse. Neurobiol Aging 2012; 33:621.e1-621.e15. [DOI: 10.1016/j.neurobiolaging.2011.02.014] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2010] [Revised: 02/03/2011] [Accepted: 02/20/2011] [Indexed: 12/19/2022]
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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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Small heat-shock protein HSPB1 mutants stabilize microtubules in Charcot-Marie-Tooth neuropathy. J Neurosci 2011; 31:15320-8. [PMID: 22031878 DOI: 10.1523/jneurosci.3266-11.2011] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Mutations in the small heat shock protein HSPB1 (HSP27) are causative for Charcot-Marie-Tooth (CMT) neuropathy. We previously showed that a subset of these mutations displays higher chaperone activity and enhanced affinity to client proteins. We hypothesized that this excessive binding property might cause the HSPB1 mutant proteins to disturb the function of proteins essential for the maintenance or survival of peripheral neurons. In the present work, we explored this hypothesis further and compared the protein complexes formed by wild-type and mutant HSPB1. Tubulin came out as the most striking differential interacting protein, with hyperactive mutants binding more strongly to both tubulin and microtubules. This anomalous binding leads to a stabilization of the microtubule network in a microtubule-associated protein-like manner as reflected by resistance to cold depolymerization, faster network recovery after nocodazole treatment, and decreased rescue and catastrophe rates of individual microtubules. In a transgenic mouse model for mutant HSPB1 that recapitulates all features of CMT, we could confirm the enhanced interaction of mutant HSPB1 with tubulin. Increased stability of the microtubule network was also clear in neurons isolated from these mice. Since neuronal cells are particularly vulnerable to disturbances in microtubule dynamics, this mechanism might explain the neuron-specific CMT phenotype caused by HSPB1 mutations.
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50
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Cellular model of Alzheimer's disease--relevance to therapeutic testing. Exp Neurol 2011; 233:733-9. [PMID: 22119424 DOI: 10.1016/j.expneurol.2011.11.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 10/26/2011] [Accepted: 11/08/2011] [Indexed: 12/29/2022]
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