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Alaiya A, Alharbi BM, Shinwari Z, Rashid M, Albinhassan TH, Bouchama A, Alwesmi MB, Mohammad S, Malik SS. Proteomics Analysis of Proteotoxic Stress Response in In-Vitro Human Neuronal Models. Int J Mol Sci 2024; 25:6787. [PMID: 38928492 PMCID: PMC11204259 DOI: 10.3390/ijms25126787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 06/02/2024] [Accepted: 06/14/2024] [Indexed: 06/28/2024] Open
Abstract
Heat stroke, a hazardous hyperthermia-related illness, is characterized by CNS injury, particularly long-lasting brain damage. A root cause for hyperthermic neurological damage is heat-induced proteotoxic stress through protein aggregation, a known causative agent of neurological disorders. Stress magnitude and enduring persistence are highly correlated with hyperthermia-associated neurological damage. We used an untargeted proteomic approach using liquid chromatography-tandem mass spectrometry (LC-MS/MS) to identify and characterize time-series proteome-wide changes in dose-responsive proteotoxic stress models in medulloblastoma [Daoy], neuroblastoma [SH-SY5Y], and differentiated SH-SY5Y neuron-like cells [SH(D)]. An integrated analysis of condition-time datasets identified global proteome-wide differentially expressed proteins (DEPs) as part of the heat-induced proteotoxic stress response. The condition-specific analysis detected higher DEPs and upregulated proteins in extreme heat stress with a relatively conservative and tight regulation in differentiated SH-SY5Y neuron-like cells. Functional network analysis using ingenuity pathway analysis (IPA) identified common intercellular pathways associated with the biological processes of protein, RNA, and amino acid metabolism and cellular response to stress and membrane trafficking. The condition-wise temporal pathway analysis in the differentiated neuron-like cells detects a significant pathway, functional, and disease association of DEPs with processes like protein folding and protein synthesis, Nervous System Development and Function, and Neurological Disease. An elaborate dose-dependent stress-specific and neuroprotective cellular signaling cascade is also significantly activated. Thus, our study provides a comprehensive map of the heat-induced proteotoxic stress response associating proteome-wide changes with altered biological processes. This helps to expand our understanding of the molecular basis of the heat-induced proteotoxic stress response with potential translational connotations.
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Affiliation(s)
- Ayodele Alaiya
- Cell Therapy & Immunobiology Department, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia
| | - Bothina Mohammed Alharbi
- Experimental Medicine Department, King Abdullah International Medical Research Center, King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh 11426, Saudi Arabia
| | - Zakia Shinwari
- Cell Therapy & Immunobiology Department, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia
| | - Mamoon Rashid
- Department of AI and Bioinformatics, King Abdullah International Medical Research Center, King Saud bin Abdulaziz University for Health Sciences, MNGHA, Riyadh 11426, Saudi Arabia
| | - Tahani H. Albinhassan
- Experimental Medicine Department, King Abdullah International Medical Research Center, King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh 11426, Saudi Arabia
- Zoology Department, College of Science, King Saud University, Riyadh 12372, Saudi Arabia
| | - Abderrezak Bouchama
- Experimental Medicine Department, King Abdullah International Medical Research Center, King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh 11426, Saudi Arabia
| | - Mai B. Alwesmi
- Medical-Surgical Nursing Department, College of Nursing, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | - Sameer Mohammad
- Experimental Medicine Department, King Abdullah International Medical Research Center, King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh 11426, Saudi Arabia
| | - Shuja Shafi Malik
- Experimental Medicine Department, King Abdullah International Medical Research Center, King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh 11426, Saudi Arabia
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Trivedi R, Knopf B, Rakoczy S, Manocha GD, Brown-Borg H, Jurivich DA. Disrupted HSF1 regulation in normal and exceptional brain aging. Biogerontology 2024; 25:147-160. [PMID: 37707683 PMCID: PMC10794279 DOI: 10.1007/s10522-023-10063-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 08/10/2023] [Indexed: 09/15/2023]
Abstract
Brain aging is a major risk factor for cognitive diseases such as Alzheimer's disease (AD) and vascular dementia. The rate of aging and age-related pathology are modulated by stress responses and repair pathways that gradually decline with age. However, recent reports indicate that exceptional longevity sustains and may even enhance the stress response. Whether normal and exceptional aging result in either attenuated or enhanced stress responses across all organs is unknown. This question arises from our understanding that biological age differs from chronological age and evidence that the rate of aging varies between organs. Thus, stress responses may differ between organs and depend upon regenerative capacity and ability to manage damaged proteins and proteotoxicity. To answer these questions, we assessed age-dependent changes in brain stress responses with normally aged wild type and long-lived Dwarf mice. Results from this study show that normal aging unfavorably impacts activation of the brain heat shock (HS) axis with key changes noted in the transcription factor, HSF1, and its regulation. Exceptional aging appears to preserve and strengthen many elements of HSF1 activation in the brain. These results support the possibility that reconstitution of aging brain stress responses requires a multi-factorial approach that addresses HSF1 protein levels, its DNA binding, and regulatory elements such as phosphorylation and protein interactions.
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Affiliation(s)
- Rachana Trivedi
- Department of Geriatrics, School of Medicine and Health Sciences, University of North Dakota, 1301 N Columbia Rd, Grand Forks, ND, 58201, USA
| | - Bailey Knopf
- Department of Geriatrics, School of Medicine and Health Sciences, University of North Dakota, 1301 N Columbia Rd, Grand Forks, ND, 58201, USA
| | - Sharlene Rakoczy
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Gunjan D Manocha
- Department of Geriatrics, School of Medicine and Health Sciences, University of North Dakota, 1301 N Columbia Rd, Grand Forks, ND, 58201, USA
| | - Holly Brown-Borg
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Donald A Jurivich
- Department of Geriatrics, School of Medicine and Health Sciences, University of North Dakota, 1301 N Columbia Rd, Grand Forks, ND, 58201, USA.
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3
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Rickner HD, Jiang L, Hong R, O'Neill NK, Mojica CA, Snyder BJ, Zhang L, Shaw D, Medalla M, Wolozin B, Cheng CS. Single cell transcriptomic profiling of a neuron-astrocyte assembloid tauopathy model. Nat Commun 2022; 13:6275. [PMID: 36271092 PMCID: PMC9587045 DOI: 10.1038/s41467-022-34005-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 10/10/2022] [Indexed: 12/25/2022] Open
Abstract
The use of iPSC derived brain organoid models to study neurodegenerative disease has been hampered by a lack of systems that accurately and expeditiously recapitulate pathogenesis in the context of neuron-glial interactions. Here we report development of a system, termed AstTau, which propagates toxic human tau oligomers in iPSC derived neuron-astrocyte assembloids. The AstTau system develops much of the neuronal and astrocytic pathology observed in tauopathies including misfolded, phosphorylated, oligomeric, and fibrillar tau, strong neurodegeneration, and reactive astrogliosis. Single cell transcriptomic profiling combined with immunochemistry characterizes a model system that can more closely recapitulate late-stage changes in adult neurodegeneration. The transcriptomic studies demonstrate striking changes in neuroinflammatory and heat shock protein (HSP) chaperone systems in the disease process. Treatment with the HSP90 inhibitor PU-H71 is used to address the putative dysfunctional HSP chaperone system and produces a strong reduction of pathology and neurodegeneration, highlighting the potential of AstTau as a rapid and reproducible tool for drug discovery.
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Affiliation(s)
| | - Lulu Jiang
- Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine, Boston, MA, 02118, USA
| | - Rui Hong
- Program in Bioinformatics, Boston University, Boston, MA, 02215, USA
| | | | - Chromewell A Mojica
- Department of Anatomy & Neurobiology, Boston University School of Medicine, Boston, MA, 02118, USA
| | - Benjamin J Snyder
- Department of Anatomy & Neurobiology, Boston University School of Medicine, Boston, MA, 02118, USA
| | - Lushuang Zhang
- Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine, Boston, MA, 02118, USA
| | - Dipan Shaw
- Informatics Group, J. Craig Venter Institute, La Jolla, CA, 92037, USA
| | - Maria Medalla
- Department of Anatomy & Neurobiology, Boston University School of Medicine, Boston, MA, 02118, USA
- Department of Neurology, Boston University School of Medicine, Boston, MA, 02118, USA
| | - Benjamin Wolozin
- Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine, Boston, MA, 02118, USA.
- Department of Neurology, Boston University School of Medicine, Boston, MA, 02118, USA.
- Center for Systems Neuroscience, Boston University, Boston, MA, 02118, USA.
| | - Christine S Cheng
- Department of Biology, Boston University, Boston, MA, 02215, USA.
- Program in Bioinformatics, Boston University, Boston, MA, 02215, USA.
- Informatics Group, J. Craig Venter Institute, La Jolla, CA, 92037, USA.
- Department of Psychiatry, University of California San Diego, La Jolla, CA, 92093, USA.
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4
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Vermeulen K, Cools R, Briard E, Auberson Y, Schoepfer J, Koole M, Cawthorne C, Bormans G. Preclinical Evaluation of [ 11C]YC-72-AB85 for In Vivo Visualization of Heat Shock Protein 90 in Brain and Cancer with Positron Emission Tomography. ACS Chem Neurosci 2021; 12:3915-3927. [PMID: 34597516 DOI: 10.1021/acschemneuro.1c00508] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Aberrant Hsp90 has been implied in cancer and neurodegenerative disorders. The development of a suitable Hsp90 Positron emission tomography (PET) probe can provide in vivo quantification of the expression levels of Hsp90 as a biomarker for diagnosis and follow-up of cancer and central nervous system (CNS) disease progression. In this respect, [11C]YC-72-AB85 was evaluated as an Hsp90 PET probe in B16.F10 melanoma bearing mice and its brain uptake was determined in rats and nonhuman primate. In vitro binding of [11C]YC-72-AB85 to tissue slices of mouse B16.F10 melanoma, PC3 prostate carcinoma, and rodent brain was evaluated using autoradiography. Biodistribution of [11C]YC-72-AB85 was evaluated in healthy and B16.F10 melanoma mice. In vivo brain uptake was assessed by μPET studies in rats and a rhesus monkey. In vitro binding was deemed Hsp90-specific by blocking studies with heterologous Hsp90 inhibitors onalespib and SNX-0723. Saturable Hsp90 binding was observed in brain, tumor, blood, and blood-rich organs in mice. In combined pretreatment and displacement studies, reversible and Hsp90-specific binding of [11C]YC-72-AB85 was observed in rat brain. Dynamic μPET brain scans in baseline and blocking conditions in a rhesus monkey indicated Hsp90-specific binding. [11C]YC-72-AB85 is a promising PET tracer for in vivo visualization of Hsp90 in tumor and brain. Clear differences of Hsp90 binding to blood and blood-rich organs were observed in tumor vs control mice. Further, we clearly demonstrate, for the first time, binding to a saturable Hsp90 pool in brain of rats and a rhesus monkey.
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Affiliation(s)
- Koen Vermeulen
- Laboratory for Radiopharmaceutical Research, Department of Pharmacy and Pharmacological Sciences, KU Leuven, 3000 Leuven, Belgium
- Radiobiology Unit & NURA, Belgian Nuclear Research Centre (SCK CEN), 2400 Mol, Belgium
| | - Romy Cools
- Laboratory for Radiopharmaceutical Research, Department of Pharmacy and Pharmacological Sciences, KU Leuven, 3000 Leuven, Belgium
| | - Emmanuelle Briard
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research, 4056 Basel, Switzerland
| | - Yves Auberson
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research, 4056 Basel, Switzerland
| | - Joseph Schoepfer
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research, 4056 Basel, Switzerland
| | - Michel Koole
- Nuclear Medicine & Molecular Imaging & MoSAIC, Department of Imaging & Pathology, KU Leuven, 3000 Leuven, Belgium
| | - Christopher Cawthorne
- Nuclear Medicine & Molecular Imaging & MoSAIC, Department of Imaging & Pathology, KU Leuven, 3000 Leuven, Belgium
| | - Guy Bormans
- Laboratory for Radiopharmaceutical Research, Department of Pharmacy and Pharmacological Sciences, KU Leuven, 3000 Leuven, Belgium
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Altered oligodendroglia and astroglia in chronic traumatic encephalopathy. Acta Neuropathol 2021; 142:295-321. [PMID: 34019156 PMCID: PMC8270845 DOI: 10.1007/s00401-021-02322-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 04/07/2021] [Accepted: 05/01/2021] [Indexed: 12/14/2022]
Abstract
Chronic traumatic encephalopathy (CTE) is a progressive tauopathy found in contact sport athletes, military veterans, and others exposed to repetitive head impacts. White matter rarefaction and axonal loss have been reported in CTE but have not been characterized on a molecular or cellular level. Here, we present RNA sequencing profiles of cell nuclei from postmortem dorsolateral frontal white matter from eight individuals with neuropathologically confirmed CTE and eight age- and sex-matched controls. Analyzing these profiles using unbiased clustering approaches, we identified eighteen transcriptomically distinct cell groups (clusters), reflecting cell types and/or cell states, of which a subset showed differences between CTE and control tissue. Independent in situ methods applied on tissue sections adjacent to that used in the single-nucleus RNA-seq work yielded similar findings. Oligodendrocytes were found to be most severely affected in the CTE white matter samples; they were diminished in number and altered in relative proportions across subtype clusters. Further, the CTE-enriched oligodendrocyte population showed greater abundance of transcripts relevant to iron metabolism and cellular stress response. CTE tissue also demonstrated excessive iron accumulation histologically. In astrocytes, total cell numbers were indistinguishable between CTE and control samples, but transcripts associated with neuroinflammation were elevated in the CTE astrocyte groups compared to controls. These results demonstrate specific molecular and cellular differences in CTE oligodendrocytes and astrocytes and suggest that white matter alterations are a critical aspect of CTE neurodegeneration.
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Wang L, Bianchi L. Maintenance of protein homeostasis in glia extends lifespan in C. elegans. Exp Neurol 2021; 339:113648. [PMID: 33600813 DOI: 10.1016/j.expneurol.2021.113648] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 02/10/2021] [Accepted: 02/12/2021] [Indexed: 02/06/2023]
Abstract
Mounting evidence support that glia play a key role in organismal ageing. However, the mechanisms by which glia impact ageing are not understood. One of the processes that has significant impact on the rate of ageing is the unfolded protein response. The more robust the UPR, the more the organism can counteract the effect of environmental and genetic stressors. However, how decline of cellular UPR translates into organismal ageing and eventual death is not fully understood. Here we discuss recent findings highlighting that neuropeptides released by glia act long distance to regulate ageing in C. elegans. Taking advantage of the short lifespan and the genetic amenability of this organism, the endoplasmic reticulum unfolded protein responses (UPRER) can be activated in C. elegans glia. This leads to cell-nonautonomous activation of the UPRER in the intestine. Activation of intestinal UPRER requires the function of genes involved in neuropeptide processing and release, suggesting that neuropeptides signal from glia to the intestine to regulate ER stress response. Importantly, the cell-nonautonomous activation of UPRER leads to extension of lifespan. Taken together, these data suggest that environmental and genetic factors that impact the response of glia to stress have the potential to influence organismal ageing. Further research on the specific neuropeptides involved should cast new light on the mechanism of ageing and may suggest novel anti-ageing therapies.
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Affiliation(s)
- Lei Wang
- Department Physiology and Biophysics, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Laura Bianchi
- Department Physiology and Biophysics, University of Miami Miller School of Medicine, Miami, FL 33136, USA.
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7
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San Gil R, Ooi L, Yerbury JJ, Ecroyd H. The heat shock response in neurons and astroglia and its role in neurodegenerative diseases. Mol Neurodegener 2017; 12:65. [PMID: 28923065 PMCID: PMC5604514 DOI: 10.1186/s13024-017-0208-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Accepted: 09/01/2017] [Indexed: 12/13/2022] Open
Abstract
Protein inclusions are a predominant molecular pathology found in numerous neurodegenerative diseases, including amyotrophic lateral sclerosis and Huntington's disease. Protein inclusions form in discrete areas of the brain characteristic to the type of neurodegenerative disease, and coincide with the death of neurons in that region (e.g. spinal cord motor neurons in amyotrophic lateral sclerosis). This suggests that the process of protein misfolding leading to inclusion formation is neurotoxic, and that cell-autonomous and non-cell autonomous mechanisms that maintain protein homeostasis (proteostasis) can, at times, be insufficient to prevent protein inclusion formation in the central nervous system. The heat shock response is a pro-survival pathway induced under conditions of cellular stress that acts to maintain proteostasis through the up-regulation of heat shock proteins, a superfamily of molecular chaperones, other co-chaperones and mitotic regulators. The kinetics and magnitude of the heat shock response varies in a stress- and cell-type dependent manner. It remains to be determined if and/or how the heat shock response is activated in the different cell-types that comprise the central nervous system (e.g. neurons and astroglia) in response to protein misfolding events that precede cellular dysfunctions in neurodegenerative diseases. This is particularly relevant considering emerging evidence demonstrating the non-cell autonomous nature of amyotrophic lateral sclerosis and Huntington's disease (and other neurodegenerative diseases) and the destructive role of astroglia in disease progression. This review highlights the complexity of heat shock response activation and addresses whether neurons and glia sense and respond to protein misfolding and aggregation associated with neurodegenerative diseases, in particular Huntington's disease and amyotrophic lateral sclerosis, by inducing a pro-survival heat shock response.
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Affiliation(s)
- Rebecca San Gil
- Illawarra Health and Medical Research Institute and School of Biological Sciences, University of Wollongong, Northfields Ave, Wollongong, 2522 Australia
| | - Lezanne Ooi
- Illawarra Health and Medical Research Institute and School of Biological Sciences, University of Wollongong, Northfields Ave, Wollongong, 2522 Australia
| | - Justin J. Yerbury
- Illawarra Health and Medical Research Institute and School of Biological Sciences, University of Wollongong, Northfields Ave, Wollongong, 2522 Australia
| | - Heath Ecroyd
- Illawarra Health and Medical Research Institute and School of Biological Sciences, University of Wollongong, Northfields Ave, Wollongong, 2522 Australia
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Wang B, Liu Y, Huang L, Chen J, Li JJ, Wang R, Kim E, Justicia C, Sakata K, Chen H, Planas A, Ostrom RS, Li W, Yang G, McDonald MP, Chen R, Heck D, Liao FF, Liao FF. A CNS-permeable Hsp90 inhibitor rescues synaptic dysfunction and memory loss in APP-overexpressing Alzheimer's mouse model via an HSF1-mediated mechanism. Mol Psychiatry 2017; 22:990-1001. [PMID: 27457810 PMCID: PMC5323357 DOI: 10.1038/mp.2016.104] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 03/27/2016] [Accepted: 04/20/2016] [Indexed: 11/09/2022]
Abstract
Induction of neuroprotective heat-shock proteins via pharmacological Hsp90 inhibitors is currently being investigated as a potential treatment for neurodegenerative diseases. Two major hurdles for therapeutic use of Hsp90 inhibitors are systemic toxicity and limited central nervous system permeability. We demonstrate here that chronic treatment with a proprietary Hsp90 inhibitor compound (OS47720) not only elicits a heat-shock-like response but also offers synaptic protection in symptomatic Tg2576 mice, a model of Alzheimer's disease, without noticeable systemic toxicity. Despite a short half-life of OS47720 in mouse brain, a single intraperitoneal injection induces rapid and long-lasting (>3 days) nuclear activation of the heat-shock factor, HSF1. Mechanistic study indicates that the remedial effects of OS47720 depend upon HSF1 activation and the subsequent HSF1-mediated transcriptional events on synaptic genes. Taken together, this work reveals a novel role of HSF1 in synaptic function and memory, which likely occurs through modulation of the synaptic transcriptome.
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Affiliation(s)
- Bin Wang
- Department of Pharmacology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163
| | - Yu Liu
- Department of Anatomy & Neurobiology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163
| | - Lianyan Huang
- Department of Anesthesiology, New York University School of Medicine, New York, NY 10016
| | - Jianjun Chen
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163
| | - Jing jing Li
- Department of Pharmacology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163
| | - Ruishan Wang
- Department of Pharmacology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163
| | - Eunhee Kim
- Department of Pharmacology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163
| | - Carles Justicia
- Department of Brain Ischemia and Neurodegeneration, Institute for Biomedical Research (IIBB-CSIC), Rossello 161, planta 6, 08036-Barcelona, Spain
| | - Kazuko Sakata
- Department of Pharmacology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163
| | - Hao Chen
- Department of Pharmacology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163
| | - Anna Planas
- Department of Brain Ischemia and Neurodegeneration, Institute for Biomedical Research (IIBB-CSIC), Rossello 161, planta 6, 08036-Barcelona, Spain
| | - Rennolds S Ostrom
- Department of Pharmacology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163
| | - Wei Li
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163
| | - Guang Yang
- Department of Anesthesiology, New York University School of Medicine, New York, NY 10016
| | - Michael P. McDonald
- Department of Anatomy & Neurobiology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163,Department of Neurology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163
| | - Ruihong Chen
- Oncosynergy, Inc; 409 Illinois St., San Francisco, CA, 94158
| | - Detlef Heck
- Department of Anatomy & Neurobiology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163
| | - Francesca-Fang Liao
- Department of Pharmacology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163,Correspondence should be addressed to Francesca-Fang Liao, Department of Pharmacology, University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee 38163.
| | - F-F Liao
- Department of Pharmacology, University of Tennessee Health Science Center, College of Medicine, Memphis, TN, USA
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Sweeney P, Park H, Baumann M, Dunlop J, Frydman J, Kopito R, McCampbell A, Leblanc G, Venkateswaran A, Nurmi A, Hodgson R. Protein misfolding in neurodegenerative diseases: implications and strategies. Transl Neurodegener 2017; 6:6. [PMID: 28293421 PMCID: PMC5348787 DOI: 10.1186/s40035-017-0077-5] [Citation(s) in RCA: 370] [Impact Index Per Article: 52.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 03/01/2017] [Indexed: 11/10/2022] Open
Abstract
A hallmark of neurodegenerative proteinopathies is the formation of misfolded protein aggregates that cause cellular toxicity and contribute to cellular proteostatic collapse. Therapeutic options are currently being explored that target different steps in the production and processing of proteins implicated in neurodegenerative disease, including synthesis, chaperone-assisted folding and trafficking, and degradation via the proteasome and autophagy pathways. Other therapies, like mTOR inhibitors and activators of the heat shock response, can rebalance the entire proteostatic network. However, there are major challenges that impact the development of novel therapies, including incomplete knowledge of druggable disease targets and their mechanism of action as well as a lack of biomarkers to monitor disease progression and therapeutic response. A notable development is the creation of collaborative ecosystems that include patients, clinicians, basic and translational researchers, foundations and regulatory agencies to promote scientific rigor and clinical data to accelerate the development of therapies that prevent, reverse or delay the progression of neurodegenerative proteinopathies.
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Affiliation(s)
- Patrick Sweeney
- Discovery Services, Charles Rivers Laboratories, Wilmington, MA USA
- Royal Veterinary College, University of London, London, UK
| | - Hyunsun Park
- Health & Life Science Consulting, Los Angeles, CA USA
| | - Marc Baumann
- Biochemistry and Developmental Biology, University of Helsinki, Helsinki, Finland
| | - John Dunlop
- Neuroscience Innovation Medicines, Astra Zeneca, Cambridge, MA USA
| | | | | | | | | | | | - Antti Nurmi
- Discovery Services, Charles Rivers Laboratories, Wilmington, MA USA
| | - Robert Hodgson
- Discovery Services, Charles Rivers Laboratories, Wilmington, MA USA
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Cellular Proteomes Drive Tissue-Specific Regulation of the Heat Shock Response. G3-GENES GENOMES GENETICS 2017; 7:1011-1018. [PMID: 28143946 PMCID: PMC5345702 DOI: 10.1534/g3.116.038232] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The heat shock response (HSR) is a cellular stress response that senses protein misfolding and restores protein folding homeostasis, or proteostasis. We previously identified an HSR regulatory network in Caenorhabditis elegans consisting of highly conserved genes that have important cellular roles in maintaining proteostasis. Unexpectedly, the effects of these genes on the HSR are distinctly tissue-specific. Here, we explore this apparent discrepancy and find that muscle-specific regulation of the HSR by the TRiC/CCT chaperonin is not driven by an enrichment of TRiC/CCT in muscle, but rather by the levels of one of its most abundant substrates, actin. Knockdown of actin subunits reduces induction of the HSR in muscle upon TRiC/CCT knockdown; conversely, overexpression of an actin subunit sensitizes the intestine so that it induces the HSR upon TRiC/CCT knockdown. Similarly, intestine-specific HSR regulation by the signal recognition particle (SRP), a component of the secretory pathway, is driven by the vitellogenins, some of the most abundant secretory proteins. Together, these data indicate that the specific protein folding requirements from the unique cellular proteomes sensitizes each tissue to disruption of distinct subsets of the proteostasis network. These findings are relevant for tissue-specific, HSR-associated human diseases such as cancer and neurodegenerative diseases. Additionally, we characterize organismal phenotypes of actin overexpression including a shortened lifespan, supporting a recent hypothesis that maintenance of the actin cytoskeleton is an important factor for longevity.
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