1
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Rather MA, Khan A, Jahan S, Siddiqui AJ, Wang L. Influence of Tau on Neurotoxicity and Cerebral Vasculature Impairment Associated with Alzheimer's Disease. Neuroscience 2024; 552:1-13. [PMID: 38871021 DOI: 10.1016/j.neuroscience.2024.05.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 05/28/2024] [Accepted: 05/29/2024] [Indexed: 06/15/2024]
Abstract
Alzheimer's disease is a fatal chronic neurodegenerative condition marked by a gradual decline in cognitive abilities and impaired vascular function within the central nervous system. This affliction initiates its insidious progression with the accumulation of two aberrant protein entities including Aβ plaques and neurofibrillary tangles. These chronic elements target distinct brain regions, steadily erasing the functionality of the hippocampus and triggering the erosion of memory and neuronal integrity. Several assumptions are anticipated for AD as genetic alterations, the occurrence of Aβ plaques, altered processing of amyloid precursor protein, mitochondrial damage, and discrepancy of neurotropic factors. In addition to Aβ oligomers, the deposition of tau hyper-phosphorylates also plays an indispensable part in AD etiology. The brain comprises a complex network of capillaries that is crucial for maintaining proper function. Tau is expressed in cerebral blood vessels, where it helps to regulate blood flow and sustain the blood-brain barrier's integrity. In AD, tau pathology can disrupt cerebral blood supply and deteriorate the BBB, leading to neuronal neurodegeneration. Neuroinflammation, deficits in the microvasculature and endothelial functions, and Aβ deposition are characteristically detected in the initial phases of AD. These variations trigger neuronal malfunction and cognitive impairment. Intracellular tau accumulation in microglia and astrocytes triggers deleterious effects on the integrity of endothelium and cerebral blood supply resulting in further advancement of the ailment and cerebral instability. In this review, we will discuss the impact of tau on neurovascular impairment, mitochondrial dysfunction, oxidative stress, and the role of hyperphosphorylated tau in neuron excitotoxicity and inflammation.
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Affiliation(s)
- Mashoque Ahmad Rather
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, United States.
| | - Andleeb Khan
- Department of Biosciences, Faculty of Science, Integral University, Lucknow, 226026, India
| | - Sadaf Jahan
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Al-Majmaah, Saudi Arabia
| | - Arif Jamal Siddiqui
- Department of Biology, College of Science, University of Hail, Hail City, Saudi Arabia
| | - Lianchun Wang
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, United States
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2
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Wang B, Martini-Stoica H, Qi C, Lu TC, Wang S, Xiong W, Qi Y, Xu Y, Sardiello M, Li H, Zheng H. TFEB-vacuolar ATPase signaling regulates lysosomal function and microglial activation in tauopathy. Nat Neurosci 2024; 27:48-62. [PMID: 37985800 DOI: 10.1038/s41593-023-01494-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 10/13/2023] [Indexed: 11/22/2023]
Abstract
Transcription factor EB (TFEB) mediates gene expression through binding to the coordinated lysosome expression and regulation (CLEAR) sequence. TFEB targets include subunits of the vacuolar ATPase (v-ATPase), which are essential for lysosome acidification. Single-nucleus RNA sequencing of wild-type and PS19 (Tau) transgenic mice expressing the P301S mutant tau identified three unique microglia subclusters in Tau mice that were associated with heightened lysosome and immune pathway genes. To explore the lysosome-immune relationship, we specifically disrupted the TFEB-v-ATPase signaling by creating a knock-in mouse line in which the CLEAR sequence of one of the v-ATPase subunits, Atp6v1h, was mutated. CLEAR mutant exhibited a muted response to TFEB, resulting in impaired lysosomal acidification and activity. Crossing the CLEAR mutant with Tau mice led to higher tau pathology but diminished microglia response. These microglia were enriched in a subcluster low in mTOR and HIF-1 pathways and were locked in a homeostatic state. Our studies demonstrate a physiological function of TFEB-v-ATPase signaling in maintaining lysosomal homeostasis and a critical role of the lysosome in mounting a microglia and immune response in tauopathy and Alzheimer's disease.
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Affiliation(s)
- Baiping Wang
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Heidi Martini-Stoica
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, USA
- Department of Otolaryngology, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Chuangye Qi
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
| | - Tzu-Chiao Lu
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
| | - Shuo Wang
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
| | - Wen Xiong
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
| | - Yanyan Qi
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
| | - Yin Xu
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
- School of Mental Health and Psychological Sciences, Anhui Medical University, Anhui, China
| | - Marco Sardiello
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Dan and Jan Duncan Neurological Research Institute, Baylor College of Medicine, Houston, TX, USA
- Department of Pediatrics, Washington University School of Medicine, St Louis, MO, USA
| | - Hongjie Li
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Hui Zheng
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA.
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA.
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3
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Cecon E, Oishi A, Luka M, Ndiaye-Lobry D, François A, Lescuyer M, Panayi F, Dam J, Machado P, Jockers R. Novel repertoire of tau biosensors to monitor pathological tau transformation and seeding activity in living cells. eLife 2023; 12:78360. [PMID: 36917493 PMCID: PMC10014071 DOI: 10.7554/elife.78360] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 02/26/2023] [Indexed: 03/12/2023] Open
Abstract
Aggregates of the tau protein are a well-known hallmark of several neurodegenerative diseases, collectively referred to as tauopathies, including frontal temporal dementia and Alzheimer's disease (AD). Monitoring the transformation process of tau from physiological monomers into pathological oligomers or aggregates in a high-throughput, quantitative manner and in a cellular context is still a major challenge in the field. Identifying molecules able to interfere with those processes is of high therapeutic interest. Here, we developed a series of inter- and intramolecular tau biosensors based on the highly sensitive Nanoluciferase (Nluc) binary technology (NanoBiT) able to monitor the pathological conformational change and self-interaction of tau in living cells. Our repertoire of tau biosensors reliably reports i. molecular proximity of physiological full-length tau at microtubules; ii. changes in tau conformation and self-interaction associated with tau phosphorylation, as well as iii. tau interaction induced by seeds of recombinant tau or from mouse brain lysates of a mouse model of tau pathology. By comparing biosensors comprising different tau forms (i.e. full-length or short fragments, wild-type, or the disease-associated tau(P301L) variant) further insights into the tau transformation process are obtained. Proof-of-concept data for the high-throughput suitability and identification of molecules interfering with the pathological tau transformation processes are presented. This novel repertoire of tau biosensors is aimed to boost the disclosure of molecular mechanisms underlying pathological tau transformation in living cells and to discover new drug candidates for tau-related neurodegenerative diseases.
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Affiliation(s)
- Erika Cecon
- Institut Cochin, Inserm U1016, CNRS UMR 8104, Université de ParisParisFrance
| | - Atsuro Oishi
- Institut Cochin, Inserm U1016, CNRS UMR 8104, Université de ParisParisFrance
| | - Marine Luka
- Institut Cochin, Inserm U1016, CNRS UMR 8104, Université de ParisParisFrance
| | | | | | - Mathias Lescuyer
- Institut Cochin, Inserm U1016, CNRS UMR 8104, Université de ParisParisFrance
| | | | - Julie Dam
- Institut Cochin, Inserm U1016, CNRS UMR 8104, Université de ParisParisFrance
| | | | - Ralf Jockers
- Institut Cochin, Inserm U1016, CNRS UMR 8104, Université de ParisParisFrance
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4
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Wang B, Martini-Stoica H, Qi C, Lu TC, Wang S, Xiong W, Qi Y, Xu Y, Sardiello M, Li H, Zheng H. TFEB-vacuolar ATPase signaling regulates lysosomal function and microglial activation in tauopathy. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.06.527293. [PMID: 36798205 PMCID: PMC9934527 DOI: 10.1101/2023.02.06.527293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Transcription factor EB (TFEB) mediates gene expression through binding to the Coordinated Lysosome Expression And Regulation (CLEAR) sequence. TFEB targets include subunits of the vacuolar ATPase (v-ATPase) essential for lysosome acidification. Single nucleus RNA-sequencing (snRNA-seq) of wild-type and PS19 (Tau) transgenic mice identified three unique microglia subclusters in Tau mice that were associated with heightened lysosome and immune pathway genes. To explore the lysosome-immune relationship, we specifically disrupted the TFEB-v-ATPase signaling by creating a knock-in mouse line in which the CLEAR sequence of one of the v-ATPase subunits, Atp6v1h, was mutated. We show that the CLEAR mutant exhibited a muted response to TFEB, resulting in impaired lysosomal acidification and activity. Crossing the CLEAR mutant with Tau mice led to higher tau pathology but diminished microglia response. These microglia were enriched in a subcluster low in mTOR and HIF-1 pathways and was locked in a homeostatic state. Our studies demonstrate a physiological function of TFEB-v-ATPase signaling in maintaining lysosomal homoeostasis and a critical role of the lysosome in mounting a microglia and immune response in tauopathy and Alzheimer's disease.
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Affiliation(s)
- Baiping Wang
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Heidi Martini-Stoica
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, USA
| | - Chuangye Qi
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
| | - Tzu-Chiao Lu
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
| | - Shuo Wang
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
| | - Wen Xiong
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
| | - Yanyan Qi
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
| | - Yin Xu
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
| | - Marco Sardiello
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Dan and Jan Duncan Neurological Research Institute, Baylor College of Medicine, Houston, TX, USA
| | - Hongjie Li
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Hui Zheng
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA
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5
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Kim SH, Lim KH, Yang S, Joo JY. Boosting of tau protein aggregation by CD40 and CD48 gene expression in Alzheimer's disease. FASEB J 2023; 37:e22702. [PMID: 36520044 DOI: 10.1096/fj.202201197r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 11/09/2022] [Accepted: 11/28/2022] [Indexed: 12/16/2022]
Abstract
Neurodegenerative diseases result from the interplay of abnormal gene expression and various pathological factors. Therefore, a disease-specific integrative genetic approach is required to understand the complexities and causes of target diseases. Recent studies have identified the correlation between genes encoding several transmembrane proteins, such as the cluster of differentiation (CD) and Alzheimer's disease (AD) pathogenesis. In this study, CD48 and CD40 gene expression in AD, a neurodegenerative disease, was analyzed to infer this link. Total RNA sequencing was performed using an Alzheimer's disease mouse model brain and blood, and gene expression was determined using a genome-wide association study (GWAS). We observed a marked elevation of CD48 and CD40 genes in Alzheimer's disease. Indeed, the upregulation of both CD48 and CD40 genes was significantly increased in the severe Alzheimer's disease group. With the elevation of CD48 and CD40 genes in Alzheimer's disease, associations of protein levels were also markedly increased in tissues. In addition, overexpression of CD48 and CD40 genes triggered tau aggregation, and co-expression of these genes accelerated aggregation. The nuclear factor kappa B (NF-ĸB) signaling pathway was enriched by CD48 and CD40 gene expression: it was also associated with tau pathology. Our data suggested that the CD48 and CD40 genes are novel AD-related genes, and this approach may be useful as a diagnostic or therapeutic target for the disease.
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Affiliation(s)
- Sung-Hyun Kim
- Department of Pharmacy, College of Pharmacy, Hanyang University, Ansan, Republic of Korea
| | - Key-Hwan Lim
- Neurodegenerative Disease Research Group, Korea Brain Research Institute, Daegu, Republic of Korea.,Department of Pharmacy, College of Pharmacy, Chungbuk National University, Cheongju-si, Republic of Korea
| | - Sumin Yang
- Department of Pharmacy, College of Pharmacy, Hanyang University, Ansan, Republic of Korea
| | - Jae-Yeol Joo
- Department of Pharmacy, College of Pharmacy, Hanyang University, Ansan, Republic of Korea
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6
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Xu Y, Du S, Marsh JA, Horie K, Sato C, Ballabio A, Karch CM, Holtzman DM, Zheng H. TFEB regulates lysosomal exocytosis of tau and its loss of function exacerbates tau pathology and spreading. Mol Psychiatry 2021; 26:5925-5939. [PMID: 32366951 PMCID: PMC7609570 DOI: 10.1038/s41380-020-0738-0] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 04/01/2020] [Accepted: 04/16/2020] [Indexed: 02/06/2023]
Abstract
Neurofibrillary tangles (NFTs) composed of hyperphosphorylated and misfolded tau protein are a pathological hallmark of Alzheimer's disease and other tauopathy conditions. Tau is predominantly an intraneuronal protein but is also secreted in physiological and pathological conditions. The extracellular tau has been implicated in the seeding and propagation of tau pathology and is the prime target of the current tau immunotherapy. However, truncated tau species lacking the microtubule-binding repeat (MTBR) domains essential for seeding have been shown to undergo active secretion and the mechanisms and functional consequences of the various extracellular tau are poorly understood. We report here that the transcription factor EB (TFEB), a master regulator of lysosomal biogenesis, plays an essential role in the lysosomal exocytosis of selected tau species. TFEB loss of function significantly reduced the levels of interstitial fluid (ISF) tau in PS19 mice expressing P301S mutant tau and in conditioned media of mutant tau expressing primary neurons, while the secretion of endogenous wild-type tau was not affected. Mechanistically we found that TFEB regulates the secretion of truncated mutant tau lacking MTBR and this process is dependent on the lysosomal calcium channel TRPML1. Consistent with the seeding-incompetent nature of the truncated tau and supporting the concept that TFEB-mediated lysosomal exocytosis promotes cellular clearance, we show that reduced ISF tau in the absence of TFEB is associated with enhanced intraneuronal pathology and accelerated spreading. Our results support the idea that TFEB-mediated tau exocytosis serves as a clearance mechanism to reduce intracellular tau under pathological conditions and that effective tau immunotherapy should devoid targeting these extracellular tau species.
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Affiliation(s)
- Yin Xu
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA.
| | - Shuqi Du
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA,Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Jacob A. Marsh
- Department of Psychiatry, Washington University School of Medicine, St Louis, MO, USA
| | - Kanta Horie
- Department of Neurology, Washington University School of Medicine, St Louis, MO, USA
| | - Chihiro Sato
- Department of Neurology, Washington University School of Medicine, St Louis, MO, USA
| | - Andrea Ballabio
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA,Dan and Jan Duncan Neurological Research Institute, Texas Children’s Hospital, Houston, TX, USA,Telethon Institute of Genetics and Medicine (TIGEM) and Department of Translational Medical Sciences, Frederico II University, Naples, Italy
| | - Celeste M. Karch
- Department of Psychiatry, Washington University School of Medicine, St Louis, MO, USA,Hope Center for Neurological Disorders, Knight Alzheimer’s Disease Research Center, Washington University School of Medicine, St. Louis, MO, USA
| | - David M. Holtzman
- Department of Neurology, Washington University School of Medicine, St Louis, MO, USA,Hope Center for Neurological Disorders, Knight Alzheimer’s Disease Research Center, Washington University School of Medicine, St. Louis, MO, USA
| | - Hui Zheng
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA. .,Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA. .,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
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7
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Kang SG, Han ZZ, Daude N, McNamara E, Wohlgemuth S, Molina-Porcel L, Safar JG, Mok SA, Westaway D. Pathologic tau conformer ensembles induce dynamic, liquid-liquid phase separation events at the nuclear envelope. BMC Biol 2021; 19:199. [PMID: 34503506 PMCID: PMC8428099 DOI: 10.1186/s12915-021-01132-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 08/26/2021] [Indexed: 02/07/2023] Open
Abstract
Background The microtubule-associated protein tau forms aggregates in different neurodegenerative diseases called tauopathies. Prior work has shown that a single P301L mutation in tau gene, MAPT, can promote alternative tau folding pathways that correlate with divergent clinical diagnoses. Using progressive chemical denaturation, some tau preparations from the brain featured complex transitions starting at low concentrations of guanidine hydrochloride (GdnHCl) denaturant, indicating an ensemble of differently folded tau species called conformers. On the other hand, brain samples with abundant, tangle-like pathology had simple GdnHCl unfolding profile resembling the profile of fibrillized recombinant tau and suggesting a unitary conformer composition. In studies here we sought to understand tau conformer progression and potential relationships with condensed liquid states, as well as associated perturbations in cell biological processes. Results As starting material, we used brain samples from P301L transgenic mice containing tau conformer ensembles that unfolded at low GdnHCl concentrations and with signatures resembling brain material from P301L subjects presenting with language or memory problems. We seeded reporter cells expressing a soluble form of 4 microtubule-binding repeat tau fused to GFP or YFP reporter moieties, resulting in redistribution of dispersed fluorescence signals into focal assemblies that could fuse together and move within processes between adjacent cells. Nuclear envelope fluorescent tau signals and small fluorescent inclusions behaved as a demixed liquid phase, indicative of liquid-liquid phase separation (LLPS); these droplets exhibited spherical morphology, fusion events and could recover from photobleaching. Moreover, juxtanuclear tau assemblies were associated with disrupted nuclear transport and reduced cell viability in a stable cell line. Staining for thioflavin S (ThS) became more prevalent as tau-derived inclusions attained cross-sectional area greater than 3 μm2, indicating (i) a bipartite composition, (ii) in vivo progression of tau conformers, and (iii) that a mass threshold applying to demixed condensates may drive liquid-solid transitions. Conclusions Tau conformer ensembles characterized by denaturation at low GdnHCl concentration templated the production of condensed droplets in living cells. These species exhibit dynamic changes and develop in vivo, and the larger ThS-positive assemblies may represent a waystation to arrive at intracellular fibrillar tau inclusions seen in end-stage genetic tauopathies. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-021-01132-y.
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Affiliation(s)
- Sang-Gyun Kang
- Centre for Prions and Protein Folding Diseases, University of Alberta, 204 Brain and Aging Research Building, Edmonton, AB, T6G 2 M8, Canada
| | - Zhuang Zhuang Han
- Centre for Prions and Protein Folding Diseases, University of Alberta, 204 Brain and Aging Research Building, Edmonton, AB, T6G 2 M8, Canada.,Department of Biochemistry, University of Alberta, Edmonton, AB, Canada
| | - Nathalie Daude
- Centre for Prions and Protein Folding Diseases, University of Alberta, 204 Brain and Aging Research Building, Edmonton, AB, T6G 2 M8, Canada
| | - Emily McNamara
- Centre for Prions and Protein Folding Diseases, University of Alberta, 204 Brain and Aging Research Building, Edmonton, AB, T6G 2 M8, Canada.,Department of Biochemistry, University of Alberta, Edmonton, AB, Canada
| | - Serene Wohlgemuth
- Centre for Prions and Protein Folding Diseases, University of Alberta, 204 Brain and Aging Research Building, Edmonton, AB, T6G 2 M8, Canada
| | | | - Jiri G Safar
- Department of Neurology and Pathology, Case Western Reserve University, Cleveland, OH, USA
| | - Sue-Ann Mok
- Centre for Prions and Protein Folding Diseases, University of Alberta, 204 Brain and Aging Research Building, Edmonton, AB, T6G 2 M8, Canada.,Department of Biochemistry, University of Alberta, Edmonton, AB, Canada
| | - David Westaway
- Centre for Prions and Protein Folding Diseases, University of Alberta, 204 Brain and Aging Research Building, Edmonton, AB, T6G 2 M8, Canada. .,Department of Biochemistry, University of Alberta, Edmonton, AB, Canada. .,Division of Neurology, University of Alberta, Edmonton, AB, Canada.
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8
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Pluta R, Czuczwar SJ, Januszewski S, Jabłoński M. The Many Faces of Post-Ischemic Tau Protein in Brain Neurodegeneration of the Alzheimer's Disease Type. Cells 2021; 10:cells10092213. [PMID: 34571862 PMCID: PMC8465797 DOI: 10.3390/cells10092213] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 08/24/2021] [Accepted: 08/25/2021] [Indexed: 12/13/2022] Open
Abstract
Recent data suggest that post-ischemic brain neurodegeneration in humans and animals is associated with the modified tau protein in a manner typical of Alzheimer’s disease neuropathology. Pathological changes in the tau protein, at the gene and protein level due to cerebral ischemia, can lead to the development of Alzheimer’s disease-type neuropathology and dementia. Some studies have shown increased tau protein staining and gene expression in neurons following ischemia-reperfusion brain injury. Recent studies have found the tau protein to be associated with oxidative stress, apoptosis, autophagy, excitotoxicity, neuroinflammation, blood-brain barrier permeability, mitochondrial dysfunction, and impaired neuronal function. In this review, we discuss the interrelationship of these phenomena with post-ischemic changes in the tau protein in the brain. The tau protein may be at the intersection of many pathological mechanisms due to severe neuropathological changes in the brain following ischemia. The data indicate that an episode of cerebral ischemia activates the damage and death of neurons in the hippocampus in a tau protein-dependent manner, thus determining a novel and important mechanism for the survival and/or death of neuronal cells following ischemia. In this review, we update our understanding of proteomic and genomic changes in the tau protein in post-ischemic brain injury and present the relationship between the modified tau protein and post-ischemic neuropathology and present a positive correlation between the modified tau protein and a post-ischemic neuropathology that has characteristics of Alzheimer’s disease-type neurodegeneration.
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Affiliation(s)
- Ryszard Pluta
- Laboratory of Ischemic and Neurodegenerative Brain Research, Mossakowski Medical Research Institute, Polish Academy of Sciences, 5 Str. Pawińskiego, 02-106 Warsaw, Poland;
- Correspondence: ; Tel.: +48-22-6086-540
| | - Stanisław J. Czuczwar
- Department of Pathophysiology, Medical University of Lublin, 8b Str. Jaczewskiego, 20-090 Lublin, Poland;
| | - Sławomir Januszewski
- Laboratory of Ischemic and Neurodegenerative Brain Research, Mossakowski Medical Research Institute, Polish Academy of Sciences, 5 Str. Pawińskiego, 02-106 Warsaw, Poland;
| | - Mirosław Jabłoński
- Department of Rehabilitation and Orthopedics, Medical University of Lublin, 8 Str. Jaczewskiego, 20-090 Lublin, Poland;
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9
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Xu Y, Propson NE, Du S, Xiong W, Zheng H. Autophagy deficiency modulates microglial lipid homeostasis and aggravates tau pathology and spreading. Proc Natl Acad Sci U S A 2021; 118:e2023418118. [PMID: 34187889 PMCID: PMC8271658 DOI: 10.1073/pnas.2023418118] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The autophagy-lysosomal pathway plays a critical role in intracellular clearance and metabolic homeostasis. While neuronal autophagy is known to participate in the degradation of neurofibrillary tangles composed of hyperphosphorylated and misfolded tau protein in Alzheimer's disease and other tauopathies, how microglial-specific autophagy regulates microglial intrinsic properties and neuronal tau pathology is not well understood. We report here that Atg7, a key mediator of autophagosome biogenesis, plays an essential role in the regulation of microglial lipid metabolism and neuroinflammation. Microglia-specific deletion of Atg7 leads to the transition of microglia to a proinflammatory status in vivo and to inflammasome activation in vitro. Activation of ApoE and lipid efflux attenuates the lipid droplets accumulation and inhibits cytokine production in microglial cells with Atg7 deficiency. Functionally, we show that the absence of microglial Atg7 enhances intraneuronal tau pathology and its spreading. Our results reveal an essential role for microglial autophagy in regulating lipid homeostasis, neuroinflammation, and tau pathology.
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Affiliation(s)
- Yin Xu
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030;
| | - Nicholas E Propson
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030
| | - Shuqi Du
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030
| | - Wen Xiong
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030
| | - Hui Zheng
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030;
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030
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10
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Del Rio JA, Ferrer I. Potential of Microfluidics and Lab-on-Chip Platforms to Improve Understanding of " prion-like" Protein Assembly and Behavior. Front Bioeng Biotechnol 2020; 8:570692. [PMID: 33015021 PMCID: PMC7506036 DOI: 10.3389/fbioe.2020.570692] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 08/18/2020] [Indexed: 12/14/2022] Open
Abstract
Human aging is accompanied by a relevant increase in age-associated chronic pathologies, including neurodegenerative and metabolic diseases. The appearance and evolution of numerous neurodegenerative diseases is paralleled by the appearance of intracellular and extracellular accumulation of misfolded proteins in affected brains. In addition, recent evidence suggests that most of these amyloid proteins can behave and propagate among neural cells similarly to infective prions. In order to improve understanding of the seeding and spreading processes of these "prion-like" amyloids, microfluidics and 3D lab-on-chip approaches have been developed as highly valuable tools. These techniques allow us to monitor changes in cellular and molecular processes responsible for amyloid seeding and cell spreading and their parallel effects in neural physiology. Their compatibility with new optical and biochemical techniques and their relative availability have increased interest in them and in their use in numerous laboratories. In addition, recent advances in stem cell research in combination with microfluidic platforms have opened new humanized in vitro models for myriad neurodegenerative diseases affecting different cellular targets of the vascular, muscular, and nervous systems, and glial cells. These new platforms help reduce the use of animal experimentation. They are more reproducible and represent a potential alternative to classical approaches to understanding neurodegeneration. In this review, we summarize recent progress in neurobiological research in "prion-like" protein using microfluidic and 3D lab-on-chip approaches. These approaches are driven by various fields, including chemistry, biochemistry, and cell biology, and they serve to facilitate the development of more precise human brain models for basic mechanistic studies of cell-to-cell interactions and drug discovery.
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Affiliation(s)
- Jose A Del Rio
- Molecular and Cellular Neurobiotechnology, Institute for Bioengineering of Catalonia, Barcelona Institute of Science and Technology, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Faculty of Biology, University of Barcelona, Barcelona, Spain.,Center for Networked Biomedical Research on Neurodegenerative Diseases (Ciberned), Barcelona, Spain.,Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - Isidre Ferrer
- Center for Networked Biomedical Research on Neurodegenerative Diseases (Ciberned), Barcelona, Spain.,Institute of Neuroscience, University of Barcelona, Barcelona, Spain.,Department of Pathology and Experimental Therapeutics, University of Barcelona, Barcelona, Spain.,Bellvitge University Hospital, Hospitalet de Llobregat, Barcelona, Spain.,Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Barcelona, Spain
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11
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Chen X, Li Y, Wang C, Tang Y, Mok SA, Tsai RM, Rojas JC, Karydas A, Miller BL, Boxer AL, Gestwicki JE, Arkin M, Cuervo AM, Gan L. Promoting tau secretion and propagation by hyperactive p300/CBP via autophagy-lysosomal pathway in tauopathy. Mol Neurodegener 2020; 15:2. [PMID: 31906970 PMCID: PMC6945522 DOI: 10.1186/s13024-019-0354-0] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 12/19/2019] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND The trans-neuronal propagation of tau has been implicated in the progression of tau-mediated neurodegeneration. There is critical knowledge gap in understanding how tau is released and transmitted, and how that is dysregulated in diseases. Previously, we reported that lysine acetyltransferase p300/CBP acetylates tau and regulates its degradation and toxicity. However, whether p300/CBP is involved in regulation of tau secretion and propagation is unknown. METHOD We investigated the relationship between p300/CBP activity, the autophagy-lysosomal pathway (ALP) and tau secretion in mouse models of tauopathy and in cultured rodent and human neurons. Through a high-through-put compound screen, we identified a new p300 inhibitor that promotes autophagic flux and reduces tau secretion. Using fibril-induced tau spreading models in vitro and in vivo, we examined how p300/CBP regulates tau propagation. RESULTS Increased p300/CBP activity was associated with aberrant accumulation of ALP markers in a tau transgenic mouse model. p300/CBP hyperactivation blocked autophagic flux and increased tau secretion in neurons. Conversely, inhibiting p300/CBP promoted autophagic flux, reduced tau secretion, and reduced tau propagation in fibril-induced tau spreading models in vitro and in vivo. CONCLUSIONS We report that p300/CBP, a lysine acetyltransferase aberrantly activated in tauopathies, causes impairment in ALP, leading to excess tau secretion. This effect, together with increased intracellular tau accumulation, contributes to enhanced spreading of tau. Our findings suggest that inhibition of p300/CBP as a novel approach to correct ALP dysfunction and block disease progression in tauopathy.
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Affiliation(s)
- Xu Chen
- Gladstone Institute of Neurological Disease, University of California, San Francisco, CA 94158 USA
- Department of Neurology, University of California, San Francisco, CA 94158 USA
| | - Yaqiao Li
- Gladstone Institute of Neurological Disease, University of California, San Francisco, CA 94158 USA
| | - Chao Wang
- Gladstone Institute of Neurological Disease, University of California, San Francisco, CA 94158 USA
- Department of Neurology, University of California, San Francisco, CA 94158 USA
| | - Yinyan Tang
- Small Molecule Discovery Center, Department of Pharmaceutical Chemistry, University of California, San Francisco, CA 94158 USA
| | - Sue-Ann Mok
- Institute for Neurodegenerative Disease, Department of Pharmaceutical Chemistry, Weill Institute for Neurosciences, University of California, San Francisco, CA 94158 USA
| | - Richard M. Tsai
- Department of Neurology, University of California, San Francisco, CA 94158 USA
- Memory and Aging Center, University of California, San Francisco, CA 94158 USA
| | - Julio C. Rojas
- Department of Neurology, University of California, San Francisco, CA 94158 USA
- Memory and Aging Center, University of California, San Francisco, CA 94158 USA
| | - Anna Karydas
- Department of Neurology, University of California, San Francisco, CA 94158 USA
- Memory and Aging Center, University of California, San Francisco, CA 94158 USA
| | - Bruce L. Miller
- Department of Neurology, University of California, San Francisco, CA 94158 USA
- Memory and Aging Center, University of California, San Francisco, CA 94158 USA
| | - Adam L. Boxer
- Department of Neurology, University of California, San Francisco, CA 94158 USA
- Memory and Aging Center, University of California, San Francisco, CA 94158 USA
| | - Jason E. Gestwicki
- Institute for Neurodegenerative Disease, Department of Pharmaceutical Chemistry, Weill Institute for Neurosciences, University of California, San Francisco, CA 94158 USA
| | - Michelle Arkin
- Small Molecule Discovery Center, Department of Pharmaceutical Chemistry, University of California, San Francisco, CA 94158 USA
| | - Ana Maria Cuervo
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY 10461 USA
- Institute for Aging Studies, Albert Einstein College of Medicine, Bronx, NY 10461 USA
| | - Li Gan
- Gladstone Institute of Neurological Disease, University of California, San Francisco, CA 94158 USA
- Department of Neurology, University of California, San Francisco, CA 94158 USA
- Helen and Robert Appel Alzheimer’s Disease Research Institute, Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065 USA
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12
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Chen X, Jiang H. Tau as a potential therapeutic target for ischemic stroke. Aging (Albany NY) 2019; 11:12827-12843. [PMID: 31841442 PMCID: PMC6949092 DOI: 10.18632/aging.102547] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 11/19/2019] [Indexed: 12/12/2022]
Abstract
Tau is a protein mainly expressed in adult human brain. It plays important roles both in neurodegenerative diseases and stroke. Stroke is an important cause of adult death and disability, ischemic stroke almost account for 80% in all cases. Abundant studies have proven that the increase of dysfunctional tau may act as a vital factor in pathological changes after ischemic stroke. However, the relationship between tau and ischemic stroke remains ununified. Based on present studies, we firstly introduced the structure and biological function of tau protein. Secondly, we summarized the potential regulatory mechanisms of tau protein in the process of ischemic stroke. Thirdly, we discussed about the findings in therapeutic researches of ischemic stroke. This review may be helpful in implementing new therapies for ischemic stroke and may be beneficial for the clinical and experimental studies.
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Affiliation(s)
- Xin Chen
- Department of Geriatrics, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Hua Jiang
- Department of Geriatrics, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
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13
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Shin WS, Di J, Cao Q, Li B, Seidler PM, Murray KA, Bitan G, Jiang L. Amyloid β-protein oligomers promote the uptake of tau fibril seeds potentiating intracellular tau aggregation. Alzheimers Res Ther 2019; 11:86. [PMID: 31627745 PMCID: PMC6800506 DOI: 10.1186/s13195-019-0541-9] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 09/22/2019] [Indexed: 01/12/2023]
Abstract
BACKGROUND Repeated failure of drug candidates targeting Alzheimer's disease (AD) in clinical trials likely stems from a lack of understanding of the molecular mechanisms underlying AD pathogenesis. Recent research has highlighted synergistic interactions between aggregated amyloid-β (Aβ) and tau proteins in AD, but the molecular details of how these interactions drive AD pathology remain elusive and speculative. METHODS Here, we test the hypothesis that Aβ potentiates intracellular tau aggregation, and show that oligomeric Aβ specifically exacerbates proteopathic seeding by tau. Using tau-biosensor cells, we show that treatment with sub-toxic concentrations of Aβ oligomers, but not monomers or fibrils, "primes" cells, making them more susceptible to tau seeding. The treatment with Aβ oligomers enhances intracellular tau aggregation in a dose-dependent manner when the cells are seeded with either recombinant or brain-derived tau fibrils, whereas little or no aggregation is observed in the absence of Aβ-oligomer priming. RESULTS Priming by Aβ oligomers appears to be specific to tau, as α-synuclein seeding is unaffected by this treatment. Aβ oligomer-enhanced tau seeding also occurs in primary mouse neurons and human neuroblastoma cells. Using fluorescently labeled tau seeds, we find that treatment with Aβ oligomers significantly enhances the cellular uptake of tau seeds, whereas a known tau-uptake inhibitor blocks the effect of Aβ on tau uptake. CONCLUSION The ability of Aβ to promote tau seeding suggests a specific and plausible mechanism by which extracellular Aβ initiates a deleterious cascade that is unique to AD. These data suggest that the Aβ-mediated potentiation of tau uptake into cells should also be taken into account when designing Aβ-targeted therapeutics.
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Affiliation(s)
- Woo Shik Shin
- Department of Neurology, David Geffen School of Medicine, UCLA, 635 Charles E Young Drive South, Los Angeles, CA 90095 USA
| | - Jing Di
- Department of Neurology, David Geffen School of Medicine, UCLA, 635 Charles E Young Drive South, Los Angeles, CA 90095 USA
| | - Qin Cao
- Departments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, UCLA, Los Angeles, CA 90095-1570 USA
| | - Binsen Li
- Department of Neurology, David Geffen School of Medicine, UCLA, 635 Charles E Young Drive South, Los Angeles, CA 90095 USA
| | - Paul M. Seidler
- Departments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, UCLA, Los Angeles, CA 90095-1570 USA
| | - Kevin A. Murray
- Departments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, UCLA, Los Angeles, CA 90095-1570 USA
| | - Gal Bitan
- Department of Neurology, David Geffen School of Medicine, UCLA, 635 Charles E Young Drive South, Los Angeles, CA 90095 USA
- Brain Research Institute, and Molecular Biology Institute, UCLA, Los Angeles, CA 90095 USA
| | - Lin Jiang
- Department of Neurology, David Geffen School of Medicine, UCLA, 635 Charles E Young Drive South, Los Angeles, CA 90095 USA
- Brain Research Institute, and Molecular Biology Institute, UCLA, Los Angeles, CA 90095 USA
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14
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Li H, Liu CC, Zheng H, Huang TY. Amyloid, tau, pathogen infection and antimicrobial protection in Alzheimer's disease -conformist, nonconformist, and realistic prospects for AD pathogenesis. Transl Neurodegener 2018; 7:34. [PMID: 30603085 PMCID: PMC6306008 DOI: 10.1186/s40035-018-0139-3] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 12/02/2018] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Alzheimer's disease (AD) is a fatal disease that threatens the quality of life of an aging population at a global scale. Various hypotheses on the etiology of AD have been developed over the years to guide efforts in search of therapeutic strategies. MAIN BODY In this review, we focus on four AD hypotheses currently relevant to AD onset: the prevailing amyloid cascade hypothesis, the well-recognized tau hypothesis, the increasingly popular pathogen (viral infection) hypothesis, and the infection-related antimicrobial protection hypothesis. In briefly reviewing the main evidence supporting each hypothesis and discussing the questions that need to be addressed, we hope to gain a better understanding of the complicated multi-layered interactions in potential causal and/or risk factors in AD pathogenesis. As a defining feature of AD, the existence of amyloid deposits is likely fundamental to AD onset but is insufficient to wholly reproduce many complexities of the disorder. A similar belief is currently also applied to hyperphosphorylated tau aggregates within neurons, where tau has been postulated to drive neurodegeneration in the presence of pre-existing Aβ plaques in the brain. Although infection of the central nerve system by pathogens such as viruses may increase AD risk, it is yet to be determined whether this phenomenon is applicable to all cases of sporadic AD and whether it is a primary trigger for AD onset. Lastly, the antimicrobial protection hypothesis provides insight into a potential physiological role for Aβ peptides, but how Aβ/microbial interactions affect AD pathogenesis during aging awaits further validation. Nevertheless, this hypothesis cautions potential adverse effects in Aβ-targeting therapies by hindering potential roles for Aβ in anti-viral protection. CONCLUSION AD is a multi-factor complex disorder, which likely requires a combinatorial therapeutic approach to successfully slow or reduce symptomatic memory decline. A better understanding of how various causal and/or risk factors affecting disease onset and progression will enhance the likelihood of conceiving effective treatment paradigms, which may involve personalized treatment strategies for individual patients at varying stages of disease progression.
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Affiliation(s)
- Hongmei Li
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL USA
| | - Chia-Chen Liu
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL USA
| | - Hui Zheng
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX USA
| | - Timothy Y. Huang
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, San Diego, CA USA
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15
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Xu Y, Zhang S, Zheng H. The cargo receptor SQSTM1 ameliorates neurofibrillary tangle pathology and spreading through selective targeting of pathological MAPT (microtubule associated protein tau). Autophagy 2018; 15:583-598. [PMID: 30290707 PMCID: PMC6526869 DOI: 10.1080/15548627.2018.1532258] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Accumulating evidence suggests that misfolded MAPT (microtubule associated protein tau), the main component of neurofibrillary tangles in tauopathies, is subject to degradation by the autophagy-lysosomal pathway. Selective autophagy is a subtype of macroautophagy that requires cargo receptors, such as OPTN (optineurin) or SQSTM1, to recognize specific targets for their sequestration within the autophagosome and their eventual degradation by the lysosome, although their roles in targeting distinct MAPT species have not been fully investigated. Using cargo receptor knockout cell lines and a seeding-based cellular assay in which neurofibrillary tangle pathology can be modeled in vitro, we reveal that while OPTN primarily targets soluble MAPT expressed in physiological conditions, SQSTM1 predominantly degrades insoluble but not soluble mutant MAPT. Endogenous SQSTM1 colocalizes with misfolded and aggregated MAPT species in vitro and in vivo, and both this colocalization and its function in MAPT clearance require both the LC3-interacting region (LIR) motif and also the PB1 self-polymerization domain of SQSTM1. Further, pathogenic MAPT accumulation reduces basal macroautophagy/autophagy in vitro and is associated with a compensatory upregulation of the lysosomal pathway in vivo. Finally, increased expression of SQSTM1 in MAPT transgenic mouse brains ameliorates MAPT pathology and prion-like spreading. Our results uncover distinct properties of selective autophagy receptors in targeting different MAPT species, implicate compromised autophagy as a potential underlying factor in mutant MAPT deposition, and demonstrate a potent and specific role of SQSTM1 in targeted clearance of pathogenic MAPT, through which it blocks neurofibrillary tangle accumulation and pathological spreading. Abbreviations: AAV: adeno-associated virus; AD: Alzheimer disease; ALP: autophagy-lysosomal pathway; ALS: amyotrophic lateral sclerosis; CALCOCO2/NDP52: calcium binding and coiled-coil domain 2; FTD: frontotemporal dementias; HD: Huntington disease; HTT: huntingtin; LIR: LC3-interacting region; NBR1: autophagy cargo receptor; NFE2L2/Nrf2: nuclear factor, erythroid derived 2, like 2; NFTs: neurofibrillary tangles; MAPT: microtubule associated protein tau; OPTN: optineurin; p-MAPT: hyperphosphorylated MAPT; PFA: paraformaldehyde; TARDBP/TDP-43: TAR DNA binding protein; TAX1BP1 Tax1: binding protein 1; ThioS: thioflavin-S; UBA: ubiquitin-associated.
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Affiliation(s)
- Yin Xu
- Huffington Center on Aging, Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Sheng Zhang
- The Brown Foundation Institute of Molecular Medicine, Department of Neurobiology and Anatomy, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Hui Zheng
- Huffington Center on Aging, Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA,CONTACT Hui Zheng Huffington Center on Aging, Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
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16
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Martini-Stoica H, Cole AL, Swartzlander DB, Chen F, Wan YW, Bajaj L, Bader DA, Lee VMY, Trojanowski JQ, Liu Z, Sardiello M, Zheng H. TFEB enhances astroglial uptake of extracellular tau species and reduces tau spreading. J Exp Med 2018; 215:2355-2377. [PMID: 30108137 PMCID: PMC6122971 DOI: 10.1084/jem.20172158] [Citation(s) in RCA: 150] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 05/11/2018] [Accepted: 07/20/2018] [Indexed: 12/12/2022] Open
Abstract
Martini-Stoica et al. demonstrate that the TFEB-mediated lysosomal pathway in astrocytes is increased in tauopathy and plays a functional role in modulating extracellular tau and the propagation of neuronal tau pathology in a mouse model of tau spreading. The progression of tau pathology in Alzheimer’s disease follows a stereotyped pattern, and recent evidence suggests a role of synaptic connections in this process. Astrocytes are well positioned at the neuronal synapse to capture and degrade extracellular tau as it transits the synapse and hence could potentially have the ability to inhibit tau spreading and delay disease progression. Our study shows increased expression and activity of Transcription Factor EB (TFEB), a master regulator of lysosomal biogenesis, in response to tau pathology in both human brains with dementia and transgenic mouse models. Exogenous TFEB expression in primary astrocytes enhances tau fibril uptake and lysosomal activity, while TFEB knockout has the reverse effect. In vivo, induced TFEB expression in astrocytes reduces pathology in the hippocampus of PS19 tauopathy mice, as well as prominently attenuates tau spreading from the ipsilateral to the contralateral hippocampus in a mouse model of tau spreading. Our study suggests that astrocytic TFEB plays a functional role in modulating extracellular tau and the propagation of neuronal tau pathology in tauopathies such as Alzheimer’s disease.
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Affiliation(s)
- Heidi Martini-Stoica
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX.,Interdepartmental Program of Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX.,Medical Scientist Training Program, Baylor College of Medicine, Houston, TX
| | - Allysa L Cole
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX
| | | | - Fading Chen
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX
| | - Ying-Wooi Wan
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
| | - Lakshya Bajaj
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
| | - David A Bader
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX.,Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX
| | - Virginia M Y Lee
- Department of Pathology and Laboratory Medicine, Institute on Aging and Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Philadelphia, PA
| | - John Q Trojanowski
- Department of Pathology and Laboratory Medicine, Institute on Aging and Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Philadelphia, PA
| | - Zhandong Liu
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX.,Department of Pediatrics, Baylor College of Medicine, Houston, TX
| | - Marco Sardiello
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
| | - Hui Zheng
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX .,Interdepartmental Program of Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
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17
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Verheyen A, Diels A, Reumers J, Van Hoorde K, Van den Wyngaert I, van Outryve d'Ydewalle C, De Bondt A, Kuijlaars J, De Muynck L, De Hoogt R, Bretteville A, Jaensch S, Buist A, Cabrera-Socorro A, Wray S, Ebneth A, Roevens P, Royaux I, Peeters PJ. Genetically Engineered iPSC-Derived FTDP-17 MAPT Neurons Display Mutation-Specific Neurodegenerative and Neurodevelopmental Phenotypes. Stem Cell Reports 2018; 11:363-379. [PMID: 30057263 PMCID: PMC6093179 DOI: 10.1016/j.stemcr.2018.06.022] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 06/29/2018] [Accepted: 06/29/2018] [Indexed: 11/15/2022] Open
Abstract
Tauopathies such as frontotemporal dementia (FTD) remain incurable to date, partially due to the lack of translational in vitro disease models. The MAPT gene, encoding the microtubule-associated protein tau, has been shown to play an important role in FTD pathogenesis. Therefore, we used zinc finger nucleases to introduce two MAPT mutations into healthy donor induced pluripotent stem cells (iPSCs). The IVS10+16 mutation increases the expression of 4R tau, while the P301S mutation is pro-aggregant. Whole-transcriptome analysis of MAPT IVS10+16 neurons reveals neuronal subtype differences, reduced neural progenitor proliferation potential, and aberrant WNT/SHH signaling. Notably, these neurodevelopmental phenotypes could be recapitulated in neurons from patients carrying the MAPT IVS10+16 mutation. Moreover, the additional pro-aggregant P301S mutation revealed additional phenotypes, such as an increased calcium burst frequency, reduced lysosomal acidity, tau oligomerization, and neurodegeneration. This series of iPSCs could serve as a platform to unravel a potential link between pathogenic 4R tau and FTD. Analysis of ZFN-engineered MAPT IVS10+16 with or without additional P301S mutation Neurodevelopmental phenotypes in ZFN and patient-derived MAPT IVS10+16 neurons Neurodegenerative phenotypes in MAPT IVS10+16/P301S double-mutant neurons
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Affiliation(s)
- An Verheyen
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium.
| | - Annick Diels
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | - Joke Reumers
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | | | - Ilse Van den Wyngaert
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | | | - An De Bondt
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | - Jacobine Kuijlaars
- Hasselt University, Biomedical Research Institute, Diepenbeek 3590, Belgium
| | - Louis De Muynck
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | - Ronald De Hoogt
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | - Alexis Bretteville
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | - Steffen Jaensch
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | - Arjan Buist
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | - Alfredo Cabrera-Socorro
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | - Selina Wray
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London WC1N 1PJ, UK
| | - Andreas Ebneth
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | - Peter Roevens
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | - Ines Royaux
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
| | - Pieter J Peeters
- Janssen Research & Development, A Division of Janssen Pharmaceutica N.V, Turnhoutseweg 30, Beerse 2340, Belgium
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18
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Falcon B, Noad J, McMahon H, Randow F, Goedert M. Galectin-8-mediated selective autophagy protects against seeded tau aggregation. J Biol Chem 2017; 293:2438-2451. [PMID: 29282296 PMCID: PMC5818177 DOI: 10.1074/jbc.m117.809293] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Revised: 12/23/2017] [Indexed: 01/19/2023] Open
Abstract
Assembled tau can transfer between cells and seed the aggregation of soluble tau. This process is thought to underlie the amplification and propagation of tau inclusions throughout the brain in neurodegenerative diseases, including Alzheimer's disease. An understanding of the mechanisms involved may provide strategies for limiting assembled tau propagation. Here, we sought to determine how assembled tau seeds gain access to the cytosol and whether this access triggers cellular defenses. We show that tau assemblies enter cells through clathrin-independent endocytosis and escape from damaged endomembranes into the cytosol, where they seed the aggregation of soluble tau. We also found that the danger receptor galectin-8 detects damaged endomembranes and activates autophagy through recruitment of the cargo receptor nuclear dot protein 52 (NDP52). Inhibition of galectin-8– and NDP52-dependent autophagy increased seeded tau aggregation, indicating that autophagy triggered by damaged endomembranes during the entry of assembled tau seeds protects against tau aggregation, in a manner similar to cellular defenses against cytosol-dwelling microorganisms. A second autophagy cargo receptor, p62, then targeted seeded tau aggregates. Our results reveal that by monitoring endomembrane integrity, cells reduce entry of tau seeds into the cytosol and thereby prevent seeded aggregation. The mechanisms described here may help inform the development of therapies aimed at inhibiting the propagation of protein assemblies in neurodegenerative diseases.
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Affiliation(s)
- Benjamin Falcon
- From the MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, United Kingdom
| | - Jessica Noad
- From the MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, United Kingdom
| | - Harvey McMahon
- From the MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, United Kingdom
| | - Felix Randow
- From the MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, United Kingdom.,Department of Medicine, University of Cambridge, Cambridge CB2 0QQ, United Kingdom, and
| | - Michel Goedert
- From the MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, United Kingdom, .,Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 0QQ, United Kingdom
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