1
|
Pontanari F, Demagny H, Faure A, Li X, Benegiamo G, Jalil A, Perino A, Auwerx J, Schoonjans K. Wars1 downregulation in hepatocytes induces mitochondrial stress and disrupts metabolic homeostasis. Metabolism 2025; 162:156061. [PMID: 39515413 DOI: 10.1016/j.metabol.2024.156061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2024] [Revised: 10/03/2024] [Accepted: 11/03/2024] [Indexed: 11/16/2024]
Abstract
Several laboratories, including ours, have employed the Slc25a47tm1c(EUCOMM)Hmgu mouse model to investigate the role of SLC25A47, a hepatocyte-specific mitochondrial carrier, in regulating hepatic metabolism and systemic physiology. In this study, we reveal that the hepatic and systemic phenotypes observed following recombination of the Slc25a47-Wars1 locus in hepatocytes are primarily driven by the unexpected downregulation of Wars1, the cytosolic tryptophan aminoacyl-tRNA synthetase located adjacent to Slc25a47. While the downregulation of Wars1 predictably affects cytosolic translation, we also observed a significant impairment in mitochondrial protein synthesis within hepatocytes. This disturbance in mitochondrial function leads to an activation of the mitochondrial unfolded protein response (UPRmt), a critical component of the mitochondrial stress response (MSR). Our findings clarify the distinct roles of Slc25a47 and Wars1 in maintaining both systemic and hepatic metabolic homeostasis. This study sheds new light on the broader implications of aminoacyl-tRNA synthetases in mitochondrial physiology and stress responses.
Collapse
Affiliation(s)
- Francesca Pontanari
- Laboratory of Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Hadrien Demagny
- Laboratory of Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Adrien Faure
- Laboratory of Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Xiaoxu Li
- Laboratory of Integrative Systems Physiology, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Giorgia Benegiamo
- Laboratory of Integrative Systems Physiology, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Antoine Jalil
- Laboratory of Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Alessia Perino
- Laboratory of Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Johan Auwerx
- Laboratory of Integrative Systems Physiology, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| | - Kristina Schoonjans
- Laboratory of Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| |
Collapse
|
2
|
Curley M, Rai M, Chuang CL, Pagala V, Stephan A, Coleman Z, Robles-Murguia M, Wang YD, Peng J, Demontis F. Transgenic sensors reveal compartment-specific effects of aggregation-prone proteins on subcellular proteostasis during aging. CELL REPORTS METHODS 2024; 4:100875. [PMID: 39383859 PMCID: PMC11573793 DOI: 10.1016/j.crmeth.2024.100875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/01/2024] [Accepted: 09/12/2024] [Indexed: 10/11/2024]
Abstract
Loss of proteostasis is a hallmark of aging that underlies many age-related diseases. Different cell compartments experience distinctive challenges in maintaining protein quality control, but how aging regulates subcellular proteostasis remains underexplored. Here, by targeting the misfolding-prone FlucDM luciferase to the cytoplasm, mitochondria, and nucleus, we established transgenic sensors to examine subcellular proteostasis in Drosophila. Analysis of detergent-insoluble and -soluble levels of compartment-targeted FlucDM variants indicates that thermal stress, cold shock, and pro-longevity inter-organ signaling differentially affect subcellular proteostasis during aging. Moreover, aggregation-prone proteins that cause different neurodegenerative diseases induce a diverse range of outcomes on FlucDM insolubility, suggesting that subcellular proteostasis is impaired in a disease-specific manner. Further analyses with FlucDM and mass spectrometry indicate that pathogenic tauV337M produces an unexpectedly complex regulation of solubility for different FlucDM variants and protein subsets. Altogether, compartment-targeted FlucDM sensors pinpoint a diverse modulation of subcellular proteostasis by aging regulators.
Collapse
Affiliation(s)
- Michelle Curley
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Mamta Rai
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Chia-Lung Chuang
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Vishwajeeth Pagala
- Center for Proteomics and Metabolomics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Anna Stephan
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Zane Coleman
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Maricela Robles-Murguia
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Yong-Dong Wang
- Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Junmin Peng
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA; Center for Proteomics and Metabolomics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA; Department of Structural Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Fabio Demontis
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA.
| |
Collapse
|
3
|
Kovács D, Biró JB, Ahmed S, Kovács M, Sigmond T, Hotzi B, Varga M, Vincze VV, Mohammad U, Vellai T, Barna J. Age-dependent heat shock hormesis to HSF-1 deficiency suggests a compensatory mechanism mediated by the unfolded protein response and innate immunity in young Caenorhabditis elegans. Aging Cell 2024; 23:e14246. [PMID: 38895933 PMCID: PMC11464127 DOI: 10.1111/acel.14246] [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: 08/01/2023] [Revised: 05/31/2024] [Accepted: 06/04/2024] [Indexed: 06/21/2024] Open
Abstract
The transcription factor HSF-1 (heat shock factor 1) acts as a master regulator of heat shock response in eukaryotic cells to maintain cellular proteostasis. The protein has a protective role in preventing cells from undergoing ageing, and neurodegeneration, and also mediates tumorigenesis. Thus, modulating HSF-1 activity in humans has a promising therapeutic potential for treating these pathologies. Loss of HSF-1 function is usually associated with impaired stress tolerance. Contrary to this conventional knowledge, we show here that inactivation of HSF-1 in the nematode Caenorhabditis elegans results in increased thermotolerance at young adult stages, whereas HSF-1 deficiency in animals passing early adult stages indeed leads to decreased thermotolerance, as compared to wild-type. Furthermore, a gene expression analysis supports that in young adults, distinct cellular stress response and immunity-related signaling pathways become induced upon HSF-1 deficiency. We also demonstrate that increased tolerance to proteotoxic stress in HSF-1-depleted young worms requires the activity of the unfolded protein response of the endoplasmic reticulum and the SKN-1/Nrf2-mediated oxidative stress response pathway, as well as an innate immunity-related pathway, suggesting a mutual compensatory interaction between HSF-1 and these conserved stress response systems. A similar compensatory molecular network is likely to also operate in higher animal taxa, raising the possibility of an unexpected outcome when HSF-1 activity is manipulated in humans.
Collapse
Affiliation(s)
- Dániel Kovács
- Department of GeneticsELTE Eötvös Loránd UniversityBudapestHungary
| | | | - Saqib Ahmed
- Department of GeneticsELTE Eötvös Loránd UniversityBudapestHungary
| | - Márton Kovács
- Department of GeneticsELTE Eötvös Loránd UniversityBudapestHungary
| | - Tímea Sigmond
- Department of GeneticsELTE Eötvös Loránd UniversityBudapestHungary
| | - Bernadette Hotzi
- Department of GeneticsELTE Eötvös Loránd UniversityBudapestHungary
| | - Máté Varga
- Department of GeneticsELTE Eötvös Loránd UniversityBudapestHungary
| | | | - Umar Mohammad
- Department of GeneticsELTE Eötvös Loránd UniversityBudapestHungary
| | - Tibor Vellai
- Department of GeneticsELTE Eötvös Loránd UniversityBudapestHungary
- HUN‐REN‐ELTE Genetics Research GroupEötvös Loránd UniversityBudapestHungary
| | - János Barna
- Department of GeneticsELTE Eötvös Loránd UniversityBudapestHungary
- HUN‐REN‐ELTE Genetics Research GroupEötvös Loránd UniversityBudapestHungary
| |
Collapse
|
4
|
Navarro-Betancourt JR, Cybulsky AV. The IRE1α pathway in glomerular diseases: The unfolded protein response and beyond. FRONTIERS IN MOLECULAR MEDICINE 2022; 2:971247. [PMID: 39086958 PMCID: PMC11285563 DOI: 10.3389/fmmed.2022.971247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 09/07/2022] [Indexed: 08/02/2024]
Abstract
Endoplasmic reticulum (ER) function is vital for protein homeostasis ("proteostasis"). Protein misfolding in the ER of podocytes (glomerular visceral epithelial cells) is an important contributor to the pathogenesis of human glomerular diseases. ER protein misfolding causes ER stress and activates a compensatory signaling network called the unfolded protein response (UPR). Disruption of the UPR, in particular deletion of the UPR transducer, inositol-requiring enzyme 1α (IRE1α) in mouse podocytes leads to podocyte injury and albuminuria in aging, and exacerbates injury in glomerulonephritis. The UPR may interact in a coordinated manner with autophagy to relieve protein misfolding and its consequences. Recent studies have identified novel downstream targets of IRE1α, which provide new mechanistic insights into proteostatic pathways. Novel pathways of IRE1α signaling involve reticulophagy, mitochondria, metabolism, vesicular trafficking, microRNAs, and others. Mechanism-based therapies for glomerulopathies are limited, and development of non-invasive ER stress biomarkers, as well as targeting ER stress with pharmacological compounds may represent a therapeutic opportunity for preventing or attenuating progression of chronic kidney disease.
Collapse
Affiliation(s)
| | - Andrey V. Cybulsky
- Department of Medicine, McGill University Health Centre Research Institute, McGill University, Montreal, QC, Canada
| |
Collapse
|
5
|
Lippi A, Krisko A. CORE at the boundary of stress resistance and longevity. Int J Biochem Cell Biol 2022; 151:106277. [PMID: 35995386 DOI: 10.1016/j.biocel.2022.106277] [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: 06/09/2022] [Revised: 08/11/2022] [Accepted: 08/12/2022] [Indexed: 10/15/2022]
Abstract
As chronological age of an organism increases, a number of errors accumulate at different levels of biological organization. The tendency of errors to accumulate and cause downstream problems in maintenance of cellular homeostasis is met by numerous protection and repair mechanisms. Maintenance of proteins is vital for cell viability and longevity, thus cellular proteostasis is supported by chaperone networks in every cellular compartment, as well as other pathways ensuring timely chaperone expression and activity. In this minireview, we summarize the progress related to the cross-organelle stress response (CORE), in charge of orchestrating a cell-wide response to compartmentalized proteotoxicity. The proposed CORE pathway encompasses activation of protein conformational maintenance machineries, antioxidant enzymes and metabolic changes simultaneously in the cytosol, mitochondria and the ER. We discuss its importance in cell survival and longevity as well as its potential to serve as a pharmaceutical target in age-related diseases.
Collapse
Affiliation(s)
- Alice Lippi
- Department of Experimental Neurodegeneration, University Medical Center Goettingen, Waldweg 33, 37075 Goettingen, Germany
| | - Anita Krisko
- Department of Experimental Neurodegeneration, University Medical Center Goettingen, Waldweg 33, 37075 Goettingen, Germany.
| |
Collapse
|
6
|
Xu J, Minobe E, Kameyama M. Ca2+ Dyshomeostasis Links Risk Factors to Neurodegeneration in Parkinson’s Disease. Front Cell Neurosci 2022; 16:867385. [PMID: 35496903 PMCID: PMC9050104 DOI: 10.3389/fncel.2022.867385] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 03/23/2022] [Indexed: 12/06/2022] Open
Abstract
Parkinson’s disease (PD), a common neurodegenerative disease characterized by motor dysfunction, results from the death of dopaminergic neurons in the substantia nigra pars compacta (SNc). Although the precise causes of PD are still unknown, several risk factors for PD have been determined, including aging, genetic mutations, environmental factors, and gender. Currently, the molecular mechanisms underlying risk factor-related neurodegeneration in PD remain elusive. Endoplasmic reticulum stress, excessive reactive oxygen species production, and impaired autophagy have been implicated in neuronal death in the SNc in PD. Considering that these pathological processes are tightly associated with intracellular Ca2+, it is reasonable to hypothesize that dysregulation of Ca2+ handling may mediate risk factors-related PD pathogenesis. We review the recent findings on how risk factors cause Ca2+ dyshomeostasis and how aberrant Ca2+ handling triggers dopaminergic neurodegeneration in the SNc in PD, thus putting forward the possibility that manipulation of specific Ca2+ handling proteins and subcellular Ca2+ homeostasis may lead to new promising strategies for PD treatment.
Collapse
|
7
|
Increased peroxisome proliferation is associated with early yeast replicative ageing. Curr Genet 2022; 68:207-225. [DOI: 10.1007/s00294-022-01233-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 02/10/2022] [Accepted: 02/11/2022] [Indexed: 11/03/2022]
|
8
|
Reprogramming of the Ethanol Stress Response in Saccharomyces cerevisiae by the Transcription Factor Znf1 and Its Effect on the Biosynthesis of Glycerol and Ethanol. Appl Environ Microbiol 2021; 87:e0058821. [PMID: 34105981 PMCID: PMC8315178 DOI: 10.1128/aem.00588-21] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
High ethanol levels can severely inhibit the growth of yeast cells and fermentation productivity. The ethanologenic yeast Saccharomyces cerevisiae activates several well-defined cellular mechanisms of ethanol stress response (ESR); however, the involved regulatory control remains to be characterized. Here, we report a new transcription factor of ethanol stress adaptation called Znf1. It plays a central role in ESR by activating genes for glycerol and fatty acid production (GUP1, GPP1, GPP2, GPD1, GAT1, and OLE1) to preserve plasma membrane integrity. Importantly, Znf1 also activates genes implicated in cell wall biosynthesis (FKS1, SED1, and SMI1) and in the unfolded protein response (HSP30, HSP104, KAR1, and LHS1) to protect cells from proteotoxic stress. The znf1Δ strain displays increased sensitivity to ethanol, the endoplasmic reticulum (ER) stressor β-mercaptoethanol, and the cell wall-perturbing agent calcofluor white. To compensate for a defective cell wall, the strain lacking ZNF1 or its target SMI1 displays increased glycerol levels of 19.6% and 27.7%, respectively. Znf1 collectively regulates an intricate network of target genes essential for growth, protein refolding, and production of key metabolites. Overexpression of ZNF1 not only confers tolerance to high ethanol levels but also increases ethanol production by 4.6% (8.43 g/liter) or 2.8% (75.78 g/liter) when 2% or 20% (wt/vol) glucose, respectively, is used as a substrate, compared to that of the wild-type strain. The mutually stress-responsive transcription factors Msn2/4, Hsf1, and Yap1 are associated with some promoters of Znf1’s target genes to promote ethanol stress tolerance. In conclusion, this work implicates the novel regulator Znf1 in coordinating expression of ESR genes and illuminates the unifying transcriptional reprogramming during alcoholic fermentation. IMPORTANCE The yeast S. cerevisiae is a major microbe that is widely used in food and nonfood industries. However, accumulation of ethanol has a negative effect on its growth and limits ethanol production. The Znf1 transcription factor has been implicated as a key regulator of glycolysis and gluconeogenesis in the utilization of different carbon sources, including glucose, the most abundant sugar on earth, and nonfermentable substrates. Here, the role of Znf1 in ethanol stress response is defined. Znf1 actively reprograms expression of genes linked to the unfolded protein response (UPR), heat shock response, glycerol and carbohydrate metabolism, and biosynthesis of cell membrane and cell wall components. A complex interplay among transcription factors of ESR indicates transcriptional fine-tuning as the main mechanism of stress adaptation, and Znf1 plays a major regulatory role in the coordination. Understanding the adaptive ethanol stress mechanism is crucial to engineering robust yeast strains for enhanced stress tolerance or increased ethanol production.
Collapse
|
9
|
Sun Y, Yu R, Guo HB, Qin H, Dang W. A quantitative yeast aging proteomics analysis reveals novel aging regulators. GeroScience 2021; 43:2573-2593. [PMID: 34241809 DOI: 10.1007/s11357-021-00412-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 06/23/2021] [Indexed: 11/29/2022] Open
Abstract
Calorie restriction (CR) is the most robust longevity intervention, extending lifespan from yeast to mammals. Numerous conserved pathways regulating aging and mediating CR have been identified; however, the overall proteomic changes during these conditions remain largely unexplored. We compared proteomes between young and replicatively aged yeast cells under normal and CR conditions using the Stable-Isotope Labeling by Amino acids in Cell culture (SILAC) quantitative proteomics and discovered distinct signatures in the aging proteome. We found remarkable proteomic similarities between aged and CR cells, including induction of stress response pathways, providing evidence that CR pathways are engaged in aged cells. These observations also uncovered aberrant changes in mitochondria membrane proteins as well as a proteolytic cellular state in old cells. These proteomics analyses help identify potential genes and pathways that have causal effects on longevity.
Collapse
Affiliation(s)
- Yu Sun
- Huffington Center On Aging and Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Ruofan Yu
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Hao-Bo Guo
- Department of Computer Science and Engineering, Department of Biology, Geology and Environmental Science, SimCenter, The University of Tennessee At Chattanooga, Chattanooga, TN, 37403, USA
| | - Hong Qin
- Department of Computer Science and Engineering, Department of Biology, Geology and Environmental Science, SimCenter, The University of Tennessee At Chattanooga, Chattanooga, TN, 37403, USA
| | - Weiwei Dang
- Huffington Center On Aging and Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA.
| |
Collapse
|
10
|
Johnston HE, Samant RS. Alternative systems for misfolded protein clearance: life beyond the proteasome. FEBS J 2020; 288:4464-4487. [PMID: 33135311 DOI: 10.1111/febs.15617] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/15/2020] [Accepted: 10/30/2020] [Indexed: 12/18/2022]
Abstract
Protein misfolding is a major driver of ageing-associated frailty and disease pathology. Although all cells possess multiple, well-characterised protein quality control systems to mitigate the toxicity of misfolded proteins, how they are integrated to maintain protein homeostasis ('proteostasis') in health-and how their disintegration contributes to disease-is still an exciting and fast-paced area of research. Under physiological conditions, the predominant route for misfolded protein clearance involves ubiquitylation and proteasome-mediated degradation. When the capacity of this route is overwhelmed-as happens during conditions of acute environmental stress, or chronic ageing-related decline-alternative routes for protein quality control are activated. In this review, we summarise our current understanding of how proteasome-targeted misfolded proteins are retrafficked to alternative protein quality control routes such as juxta-nuclear sequestration and selective autophagy when the ubiquitin-proteasome system is compromised. We also discuss the molecular determinants of these alternative protein quality control systems, attempt to clarify distinctions between various cytoplasmic spatial quality control inclusion bodies (e.g., Q-bodies, p62 bodies, JUNQ, aggresomes, and aggresome-like induced structures 'ALIS'), and speculate on emerging concepts in the field that we hope will spur future research-with the potential to benefit the rational development of healthy ageing strategies.
Collapse
Affiliation(s)
| | - Rahul S Samant
- Signalling Programme, The Babraham Institute, Cambridge, UK
| |
Collapse
|
11
|
Celecoxib promotes survival and upregulates the expression of neuroprotective marker genes in two different in vitro models of Parkinson's disease. Neuropharmacology 2020; 194:108378. [PMID: 33160981 DOI: 10.1016/j.neuropharm.2020.108378] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 10/12/2020] [Accepted: 10/28/2020] [Indexed: 12/24/2022]
Abstract
Parkinson's disease (PD) is the second most common age-related neurodegenerative disorder after Alzheimer's disease. Increasing evidence highlights the role of age-related chronic inflammation, oxidative stress and mitochondrial dysfunction in the pathogenesis of PD. A combination of these factors impairs the crosstalk between mitochondria and lysosomes, resulting in compromised cell homeostasis. Apolipoprotein D (APOD), an ancient and highly conserved anti-inflammatory and antioxidant lipocalin, and the transcription factor EB (TFEB), a master regulator of mitophagy, autophagy and lysosomal biogenesis, play key roles in these processes. Both APOD and TFEB have attracted attention as therapeutic targets for PD. The aim of this study was to investigate if the selective cyclooxygenase-2 inhibitor celecoxib (CXB) exerts a direct neuroprotective effect in 6-hydroxydopamine (6-OHDA) and paraquat (PQ) PD models. We found that CXB rescued SH-SY5Y cells challenged by 6-OHDA- and PQ-induced toxicity. Furthermore, treatment with CXB led to a marked and sustained upregulation of APOD and the two microphthalmia transcription factors TFEB and MITF. In sum, this study highlights the clinically approved drug CXB as a promising neuroprotective therapeutic tool in PD research that has the potential to increase the survival rate of dopaminergic neurons that are still alive at the time of diagnosis.
Collapse
|
12
|
Gioran A, Chondrogianni N. Mitochondria (cross)talk with proteostatic mechanisms: Focusing on ageing and neurodegenerative diseases. Mech Ageing Dev 2020; 190:111324. [DOI: 10.1016/j.mad.2020.111324] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/28/2020] [Accepted: 07/29/2020] [Indexed: 12/15/2022]
|
13
|
Igwebuike C, Yaglom J, Huiting L, Feng H, Campbell JD, Wang Z, Havasi A, Pimentel D, Sherman MY, Borkan SC. Cross organelle stress response disruption promotes gentamicin-induced proteotoxicity. Cell Death Dis 2020; 11:217. [PMID: 32245975 PMCID: PMC7125232 DOI: 10.1038/s41419-020-2382-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 12/19/2019] [Accepted: 01/09/2020] [Indexed: 12/17/2022]
Abstract
Gentamicin is a nephrotoxic antibiotic that causes acute kidney injury (AKI) primarily by targeting the proximal tubule epithelial cell. The development of an effective therapy for gentamicin-induced renal cell injury is limited by incomplete mechanistic insight. To address this challenge, we propose that RNAi signal pathway screening could identify a unifying mechanism of gentamicin-induced cell injury and suggest a therapeutic strategy to ameliorate it. Computational analysis of RNAi signal screens in gentamicin-exposed human proximal tubule cells suggested the cross-organelle stress response (CORE), the unfolded protein response (UPR), and cell chaperones as key targets of gentamicin-induced injury. To test this hypothesis, we assessed the effect of gentamicin on the CORE, UPR, and cell chaperone function, and tested the therapeutic efficacy of enhancing cell chaperone content. Early gentamicin exposure disrupted the CORE, evidenced by a rise in the ATP:ADP ratio, mitochondrial-specific H2O2 accumulation, Drp-1-mediated mitochondrial fragmentation, and endoplasmic reticulum-mitochondrial dissociation. CORE disruption preceded measurable increases in whole-cell oxidative stress, misfolded protein content, transcriptional UPR activation, and its untoward downstream effects: CHOP expression, PARP cleavage, and cell death. Geranylgeranylacetone, a therapeutic that increases cell chaperone content, prevented mitochondrial H2O2 accumulation, preserved the CORE, reduced the burden of misfolded proteins and CHOP expression, and significantly improved survival in gentamicin-exposed cells. We identify CORE disruption as an early and remediable cause of gentamicin proteotoxicity that precedes downstream UPR activation and cell death. Preserving the CORE significantly improves renal cell survival likely by reducing organelle-specific proteotoxicity during gentamicin exposure.
Collapse
Affiliation(s)
| | - Julia Yaglom
- Boston University School of Medicine, Department of Biochemistry, Boston, MA, USA
- Ariel University, Department of Molecular Biology, Ariel, West Bank, Israel
| | - Leah Huiting
- Boston University School of Medicine, Department of Pharmacology and Experimental Therapeutics, Boston, MA, USA
| | - Hui Feng
- Boston University School of Medicine, Department of Pharmacology and Experimental Therapeutics, Boston, MA, USA
| | - Joshua D Campbell
- Boston University School of Medicine, Department of Computational Biomedicine, Boston, MA, USA
| | - Zhiyong Wang
- Boston Medical Center, Department of Medicine, Renal Section, Boston, MA, USA
| | - Andrea Havasi
- Boston Medical Center, Department of Medicine, Renal Section, Boston, MA, USA
| | - David Pimentel
- Boston University School of Medicine, Department of Cardiology, Boston, MA, USA
| | - Michael Y Sherman
- Ariel University, Department of Molecular Biology, Ariel, West Bank, Israel
- Boston University School of Medicine, Department of Cardiology, Boston, MA, USA
| | - Steven C Borkan
- Boston Medical Center, Department of Medicine, Renal Section, Boston, MA, USA.
| |
Collapse
|
14
|
Telini BDP, Menoncin M, Bonatto D. Does Inter-Organellar Proteostasis Impact Yeast Quality and Performance During Beer Fermentation? Front Genet 2020; 11:2. [PMID: 32076433 PMCID: PMC7006503 DOI: 10.3389/fgene.2020.00002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 01/06/2020] [Indexed: 02/02/2023] Open
Abstract
During beer production, yeast generate ethanol that is exported to the extracellular environment where it accumulates. Depending on the initial carbohydrate concentration in the wort, the amount of yeast biomass inoculated, the fermentation temperature, and the yeast attenuation capacity, a high concentration of ethanol can be achieved in beer. The increase in ethanol concentration as a consequence of the fermentation of high gravity (HG) or very high gravity (VHG) worts promotes deleterious pleiotropic effects on the yeast cells. Moderate concentrations of ethanol (5% v/v) change the enzymatic kinetics of proteins and affect biological processes, such as the cell cycle and metabolism, impacting the reuse of yeast for subsequent fermentation. However, high concentrations of ethanol (> 5% v/v) dramatically alter protein structure, leading to unfolded proteins as well as amorphous protein aggregates. It is noteworthy that the effects of elevated ethanol concentrations generated during beer fermentation resemble those of heat shock stress, with similar responses observed in both situations, such as the activation of proteostasis and protein quality control mechanisms in different cell compartments, including endoplasmic reticulum (ER), mitochondria, and cytosol. Despite the extensive published molecular and biochemical data regarding the roles of proteostasis in different organelles of yeast cells, little is known about how this mechanism impacts beer fermentation and how different proteostasis mechanisms found in ER, mitochondria, and cytosol communicate with each other during ethanol/fermentative stress. Supporting this integrative view, transcriptome data analysis was applied using publicly available information for a lager yeast strain grown under beer production conditions. The transcriptome data indicated upregulation of genes that encode chaperones, co-chaperones, unfolded protein response elements in ER and mitochondria, ubiquitin ligases, proteasome components, N-glycosylation quality control pathway proteins, and components of processing bodies (p-bodies) and stress granules (SGs) during lager beer fermentation. Thus, the main purpose of this hypothesis and theory manuscript is to provide a concise picture of how inter-organellar proteostasis mechanisms are connected with one another and with biological processes that may modulate the viability and/or vitality of yeast populations during HG/VHG beer fermentation and serial repitching.
Collapse
Affiliation(s)
- Bianca de Paula Telini
- Brewing Yeast Research Group, Centro de Biotecnologia da UFRGS, Departamento de Biologia Molecular e Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Marcelo Menoncin
- Brewing Yeast Research Group, Centro de Biotecnologia da UFRGS, Departamento de Biologia Molecular e Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Diego Bonatto
- Brewing Yeast Research Group, Centro de Biotecnologia da UFRGS, Departamento de Biologia Molecular e Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| |
Collapse
|
15
|
Andréasson C, Ott M, Büttner S. Mitochondria orchestrate proteostatic and metabolic stress responses. EMBO Rep 2019; 20:e47865. [PMID: 31531937 PMCID: PMC6776902 DOI: 10.15252/embr.201947865] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 05/13/2019] [Accepted: 08/27/2019] [Indexed: 01/06/2023] Open
Abstract
The eukaryotic cell is morphologically and functionally organized as an interconnected network of organelles that responds to stress and aging. Organelles communicate via dedicated signal transduction pathways and the transfer of information in form of metabolites and energy levels. Recent data suggest that the communication between organellar proteostasis systems is a cornerstone of cellular stress responses in eukaryotic cells. Here, we discuss the integration of proteostasis and energy fluxes in the regulation of cellular stress and aging. We emphasize the molecular architecture of the regulatory transcriptional pathways that both sense and control metabolism and proteostasis. A special focus is placed on mechanistic insights gained from the model organism budding yeast in signaling from mitochondria to the nucleus and how this shapes cellular fitness.
Collapse
Affiliation(s)
- Claes Andréasson
- Department of Molecular BiosciencesThe Wenner‐Gren InstituteStockholm UniversityStockholmSweden
| | - Martin Ott
- Department of Biochemistry and BiophysicsStockholm UniversityStockholmSweden
| | - Sabrina Büttner
- Department of Molecular BiosciencesThe Wenner‐Gren InstituteStockholm UniversityStockholmSweden
- Institute of Molecular BiosciencesUniversity of GrazGrazAustria
| |
Collapse
|
16
|
Cell organelles and yeast longevity: an intertwined regulation. Curr Genet 2019; 66:15-41. [PMID: 31535186 DOI: 10.1007/s00294-019-01035-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 09/12/2019] [Accepted: 09/12/2019] [Indexed: 12/16/2022]
Abstract
Organelles are dynamic structures of a eukaryotic cell that compartmentalize various essential functions and regulate optimum functioning. On the other hand, ageing is an inevitable phenomenon that leads to irreversible cellular damage and affects optimum functioning of cells. Recent research shows compelling evidence that connects organelle dysfunction to ageing-related diseases/disorders. Studies in several model systems including yeast have led to seminal contributions to the field of ageing in uncovering novel pathways, proteins and their functions, identification of pro- and anti-ageing factors and so on. In this review, we present a comprehensive overview of findings that highlight the role of organelles in ageing and ageing-associated functions/pathways in yeast.
Collapse
|
17
|
Raimundo N, Kriško A. Cross-organelle communication at the core of longevity. Aging (Albany NY) 2019; 10:15-16. [PMID: 29362289 PMCID: PMC5811256 DOI: 10.18632/aging.101373] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 01/21/2018] [Indexed: 11/25/2022]
Affiliation(s)
- Nuno Raimundo
- Institut für Zellbiochemie, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Anita Kriško
- Mediterranean Institute for Life Sciences, Split, Croatia
| |
Collapse
|
18
|
Raimundo N, Krisko A. Editorial: Mitochondrial Communication in Physiology, Disease and Aging. Front Cell Dev Biol 2019; 7:54. [PMID: 31032256 PMCID: PMC6470183 DOI: 10.3389/fcell.2019.00054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 03/25/2019] [Indexed: 01/26/2023] Open
Affiliation(s)
- Nuno Raimundo
- Institute for Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany
| | - Anita Krisko
- Mediterranean Institute for Life Sciences, Split, Croatia
| |
Collapse
|
19
|
Fernandez-Mosquera L, Yambire KF, Couto R, Pereyra L, Pabis K, Ponsford AH, Diogo CV, Stagi M, Milosevic I, Raimundo N. Mitochondrial respiratory chain deficiency inhibits lysosomal hydrolysis. Autophagy 2019; 15:1572-1591. [PMID: 30917721 PMCID: PMC6693470 DOI: 10.1080/15548627.2019.1586256] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Mitochondria are key organelles for cellular metabolism, and regulate several processes including cell death and macroautophagy/autophagy. Here, we show that mitochondrial respiratory chain (RC) deficiency deactivates AMP-activated protein kinase (AMPK, a key regulator of energy homeostasis) signaling in tissue and in cultured cells. The deactivation of AMPK in RC-deficiency is due to increased expression of the AMPK-inhibiting protein FLCN (folliculin). AMPK is found to be necessary for basal lysosomal function, and AMPK deactivation in RC-deficiency inhibits lysosomal function by decreasing the activity of the lysosomal Ca2+ channel MCOLN1 (mucolipin 1). MCOLN1 is regulated by phosphoinositide kinase PIKFYVE and its product PtdIns(3,5)P2, which is also decreased in RC-deficiency. Notably, reactivation of AMPK, in a PIKFYVE-dependent manner, or of MCOLN1 in RC-deficient cells, restores lysosomal hydrolytic capacity. Building on these data and the literature, we propose that downregulation of the AMPK-PIKFYVE-PtdIns(3,5)P2-MCOLN1 pathway causes lysosomal Ca2+ accumulation and impaired lysosomal catabolism. Besides unveiling a novel role of AMPK in lysosomal function, this study points to the mechanism that links mitochondrial malfunction to impaired lysosomal catabolism, underscoring the importance of AMPK and the complexity of organelle cross-talk in the regulation of cellular homeostasis. Abbreviation: ΔΨm: mitochondrial transmembrane potential; AMP: adenosine monophosphate; AMPK: AMP-activated protein kinase; ATG5: autophagy related 5; ATP: adenosine triphosphate; ATP6V0A1: ATPase, H+ transporting, lysosomal, V0 subbunit A1; ATP6V1A: ATPase, H+ transporting, lysosomal, V0 subbunit A; BSA: bovine serum albumin; CCCP: carbonyl cyanide-m-chlorophenylhydrazone; CREB1: cAMP response element binding protein 1; CTSD: cathepsin D; CTSF: cathepsin F; DMEM: Dulbecco’s modified Eagle’s medium; DMSO: dimethyl sulfoxide; EBSS: Earl’s balanced salt solution; ER: endoplasmic reticulum; FBS: fetal bovine serum; FCCP: carbonyl cyanide-p-trifluoromethoxyphenolhydrazone; GFP: green fluorescent protein; GPN: glycyl-L-phenylalanine 2-naphthylamide; LAMP1: lysosomal associated membrane protein 1; MAP1LC3B/LC3B: microtubule associated protein 1 light chain 3 beta; MCOLN1/TRPML1: mucolipin 1; MEF: mouse embryonic fibroblast; MITF: melanocyte inducing transcription factor; ML1N*2-GFP: probe used to detect PtdIns(3,5)P2 based on the transmembrane domain of MCOLN1; MTORC1: mechanistic target of rapamycin kinase complex 1; NDUFS4: NADH:ubiquinone oxidoreductase subunit S4; OCR: oxygen consumption rate; PBS: phosphate-buffered saline; pcDNA: plasmid cytomegalovirus promoter DNA; PCR: polymerase chain reaction; PtdIns3P: phosphatidylinositol-3-phosphate; PtdIns(3,5)P2: phosphatidylinositol-3,5-bisphosphate; PIKFYVE: phosphoinositide kinase, FYVE-type zinc finger containing; P/S: penicillin-streptomycin; PVDF: polyvinylidene fluoride; qPCR: quantitative real time polymerase chain reaction; RFP: red fluorescent protein; RNA: ribonucleic acid; SDS-PAGE: sodium dodecyl sulfate polyacrylamide gel electrophoresis; shRNA: short hairpin RNA; siRNA: small interfering RNA; TFEB: transcription factor EB; TFE3: transcription factor binding to IGHM enhancer 3; TMRM: tetramethylrhodamine, methyl ester, perchlorate; ULK1: unc-51 like autophagy activating kinase 1; ULK2: unc-51 like autophagy activating kinase 2; UQCRC1: ubiquinol-cytochrome c reductase core protein 1; v-ATPase: vacuolar-type H+-translocating ATPase; WT: wild-type
Collapse
Affiliation(s)
- Lorena Fernandez-Mosquera
- a Institute of Cellular Biochemistry, University Medical Center Goettingen , Goettingen , Germany.,b Doctoral Program in Molecular Medicine, Georg August University Goettingen , Goettingen , Germany
| | - King Faisal Yambire
- a Institute of Cellular Biochemistry, University Medical Center Goettingen , Goettingen , Germany.,c International Max-Planck Research School in Neuroscience , Goettingen , Germany.,d European Neuroscience Institute Goettingen, University Medical Center Goettingen and Max-Planck Society , Goettingen , Germany
| | - Renata Couto
- a Institute of Cellular Biochemistry, University Medical Center Goettingen , Goettingen , Germany.,e Doctoral Program in Molecular Biology of Cells, Göttingen Graduate School for Neurosciences, Biophysics, and Molecular Biosciences, University of Goettingen , Goettingen , Germany
| | - Leonardo Pereyra
- a Institute of Cellular Biochemistry, University Medical Center Goettingen , Goettingen , Germany.,e Doctoral Program in Molecular Biology of Cells, Göttingen Graduate School for Neurosciences, Biophysics, and Molecular Biosciences, University of Goettingen , Goettingen , Germany
| | - Kamil Pabis
- a Institute of Cellular Biochemistry, University Medical Center Goettingen , Goettingen , Germany
| | - Amy H Ponsford
- f Institute of Translational Medicine, University of Liverpool , Liverpool , UK
| | - Cátia V Diogo
- a Institute of Cellular Biochemistry, University Medical Center Goettingen , Goettingen , Germany
| | - Massimiliano Stagi
- f Institute of Translational Medicine, University of Liverpool , Liverpool , UK
| | - Ira Milosevic
- d European Neuroscience Institute Goettingen, University Medical Center Goettingen and Max-Planck Society , Goettingen , Germany
| | - Nuno Raimundo
- a Institute of Cellular Biochemistry, University Medical Center Goettingen , Goettingen , Germany
| |
Collapse
|
20
|
Yeast at the Forefront of Research on Ageing and Age-Related Diseases. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2019; 58:217-242. [PMID: 30911895 DOI: 10.1007/978-3-030-13035-0_9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Ageing is a complex and multifactorial process driven by genetic, environmental and stochastic factors that lead to the progressive decline of biological systems. Mechanisms of ageing have been extensively investigated in various model organisms and systems generating fundamental advances. Notably, studies on yeast ageing models have made numerous and relevant contributions to the progress in the field. Different longevity factors and pathways identified in yeast have then been shown to regulate molecular ageing in invertebrate and mammalian models. Currently the best candidates for anti-ageing drugs such as spermidine and resveratrol or anti-ageing interventions such as caloric restriction were first identified and explored in yeast. Yeasts have also been instrumental as models to study the cellular and molecular effects of proteins associated with age-related diseases such as Parkinson's, Huntington's or Alzheimer's diseases. In this chapter, a review of the advances on ageing and age-related diseases research in yeast models will be made. Particular focus will be placed on key longevity factors, ageing hallmarks and interventions that slow ageing, both yeast-specific and those that seem to be conserved in multicellular organisms. Their impact on the pathogenesis of age-related diseases will be also discussed.
Collapse
|
21
|
Leonov A, Arlia-Ciommo A, Bourque SD, Koupaki O, Kyryakov P, Dakik P, McAuley M, Medkour Y, Mohammad K, Di Maulo T, Titorenko VI. Specific changes in mitochondrial lipidome alter mitochondrial proteome and increase the geroprotective efficiency of lithocholic acid in chronologically aging yeast. Oncotarget 2018; 8:30672-30691. [PMID: 28410198 PMCID: PMC5458158 DOI: 10.18632/oncotarget.16766] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 03/20/2017] [Indexed: 02/07/2023] Open
Abstract
We have previously found that exogenously added lithocholic acid delays yeast chronological aging. We demonstrated that lithocholic acid enters the yeast cell, is sorted to mitochondria, resides in both mitochondrial membranes, changes the relative concentrations of different membrane phospholipids, triggers changes in the concentrations of many mitochondrial proteins, and alters some key aspects of mitochondrial functionality. We hypothesized that the lithocholic acid-driven changes in mitochondrial lipidome may have a causal role in the remodeling of mitochondrial proteome, which may in turn alter the functional state of mitochondria to create a mitochondrial pattern that delays yeast chronological aging. Here, we test this hypothesis by investigating how the ups1?, ups2? and psd1? mutations that eliminate enzymes involved in mitochondrial phospholipid metabolism influence the mitochondrial lipidome. We also assessed how these mutations affect the mitochondrial proteome, influence mitochondrial functionality and impinge on the efficiency of aging delay by lithocholic acid. Our findings provide evidence that 1) lithocholic acid initially creates a distinct pro-longevity pattern of mitochondrial lipidome by proportionally decreasing phosphatidylethanolamine and cardiolipin concentrations to maintain equimolar concentrations of these phospholipids, and by increasing phosphatidic acid concentration; 2) this pattern of mitochondrial lipidome allows to establish a specific, aging-delaying pattern of mitochondrial proteome; and 3) this pattern of mitochondrial proteome plays an essential role in creating a distinctive, geroprotective pattern of mitochondrial functionality.
Collapse
Affiliation(s)
- Anna Leonov
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | | | - Simon D Bourque
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Olivia Koupaki
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Pavlo Kyryakov
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Paméla Dakik
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Mélissa McAuley
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Younes Medkour
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Karamat Mohammad
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Tamara Di Maulo
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | | |
Collapse
|
22
|
Deprez MA, Eskes E, Wilms T, Ludovico P, Winderickx J. pH homeostasis links the nutrient sensing PKA/TORC1/Sch9 ménage-à-trois to stress tolerance and longevity. MICROBIAL CELL 2018; 5:119-136. [PMID: 29487859 PMCID: PMC5826700 DOI: 10.15698/mic2018.03.618] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The plasma membrane H+-ATPase Pma1 and the vacuolar V-ATPase act in close harmony to tightly control pH homeostasis, which is essential for a vast number of physiological processes. As these main two regulators of pH are responsive to the nutritional status of the cell, it seems evident that pH homeostasis acts in conjunction with nutrient-induced signalling pathways. Indeed, both PKA and the TORC1-Sch9 axis influence the proton pumping activity of the V-ATPase and possibly also of Pma1. In addition, it recently became clear that the proton acts as a second messenger to signal glucose availability via the V-ATPase to PKA and TORC1-Sch9. Given the prominent role of nutrient signalling in longevity, it is not surprising that pH homeostasis has been linked to ageing and longevity as well. A first indication is provided by acetic acid, whose uptake by the cell induces toxicity and affects longevity. Secondly, vacuolar acidity has been linked to autophagic processes, including mitophagy. In agreement with this, a decline in vacuolar acidity was shown to induce mitochondrial dysfunction and shorten lifespan. In addition, the asymmetric inheritance of Pma1 has been associated with replicative ageing and this again links to repercussions on vacuolar pH. Taken together, accumulating evidence indicates that pH homeostasis plays a prominent role in the determination of ageing and longevity, thereby providing new perspectives and avenues to explore the underlying molecular mechanisms.
Collapse
Affiliation(s)
| | - Elja Eskes
- Functional Biology, KU Leuven, Leuven, Belgium
| | | | - Paula Ludovico
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | | |
Collapse
|
23
|
Rimon O, Suss O, Goldenberg M, Fassler R, Yogev O, Amartely H, Propper G, Friedler A, Reichmann D. A Role of Metastable Regions and Their Connectivity in the Inactivation of a Redox-Regulated Chaperone and Its Inter-Chaperone Crosstalk. Antioxid Redox Signal 2017; 27:1252-1267. [PMID: 28394178 DOI: 10.1089/ars.2016.6900] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
AIMS A recently discovered group of conditionally disordered chaperones share a very unique feature; they need to lose structure to become active as chaperones. This activation mechanism makes these chaperones particularly suited to respond to protein-unfolding stress conditions, such as oxidative unfolding. However, the role of this disorder in stress-related activation, chaperone function, and the crosstalk with other chaperone systems is not yet clear. Here, we focus on one of the members of the conditionally disordered chaperones, a thiol-redox switch of the bacterial proteostasis system, Hsp33. RESULTS By modifying the Hsp33's sequence, we reveal that the metastable region has evolved to abolish redox-dependent chaperone activity, rather than enhance binding affinity for client proteins. The intrinsically disordered region of Hsp33 serves as an anchor for the reduced, inactive state of Hsp33, and it dramatically affects the crosstalk with the synergetic chaperone system, DnaK/J. Using mass spectrometry, we describe the role that the metastable region plays in determining client specificity during normal and oxidative stress conditions in the cell. Innovation and Conclusion: We uncover a new role of protein plasticity in Hsp33's inactivation, client specificity, crosstalk with the synergistic chaperone system DnaK/J, and oxidative stress-specific interactions in bacteria. Our results also suggest that Hsp33 might serve as a member of the house-keeping proteostasis machinery, tasked with maintaining a "healthy" proteome during normal conditions, and that this function does not depend on the metastable linker region. Antioxid. Redox Signal. 27, 1252-1267.
Collapse
Affiliation(s)
- Oded Rimon
- 1 Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem , Jerusalem, Israel
| | - Ohad Suss
- 1 Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem , Jerusalem, Israel
| | - Mor Goldenberg
- 1 Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem , Jerusalem, Israel
| | - Rosi Fassler
- 1 Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem , Jerusalem, Israel
| | - Ohad Yogev
- 1 Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem , Jerusalem, Israel
| | - Hadar Amartely
- 2 Institute of Chemistry, The Hebrew University of Jerusalem , Safra Campus Givat Ram, Jerusalem, Israel
| | - Guy Propper
- 1 Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem , Jerusalem, Israel
| | - Assaf Friedler
- 2 Institute of Chemistry, The Hebrew University of Jerusalem , Safra Campus Givat Ram, Jerusalem, Israel
| | - Dana Reichmann
- 1 Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem , Jerusalem, Israel
| |
Collapse
|
24
|
Perić M, Lovrić A, Šarić A, Musa M, Bou Dib P, Rudan M, Nikolić A, Sobočanec S, Mikecin AM, Dennerlein S, Milošević I, Vlahoviček K, Raimundo N, Kriško A. TORC1-mediated sensing of chaperone activity alters glucose metabolism and extends lifespan. Aging Cell 2017; 16:994-1005. [PMID: 28613034 PMCID: PMC5595670 DOI: 10.1111/acel.12623] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2017] [Indexed: 11/28/2022] Open
Abstract
Protein quality control mechanisms, required for normal cellular functioning, encompass multiple functions related to protein production and maintenance. However, the existence of communication between proteostasis and metabolic networks and its underlying mechanisms remain elusive. Here, we report that enhanced chaperone activity and consequent improved proteostasis are sensed by TORC1 via the activity of Hsp82. Chaperone enrichment decreases the level of Hsp82, which deactivates TORC1 and leads to activation of Snf1/AMPK, regardless of glucose availability. This mechanism culminates in the extension of yeast replicative lifespan (RLS) that is fully reliant on both TORC1 deactivation and Snf1/AMPK activation. Specifically, we identify oxygen consumption increase as the downstream effect of Snf1 activation responsible for the entire RLS extension. Our results set a novel paradigm for the role of proteostasis in aging: modulation of the misfolded protein level can affect cellular metabolic features as well as mitochondrial activity and consequently modify lifespan. The described mechanism is expected to open new avenues for research of aging and age‐related diseases.
Collapse
Affiliation(s)
- Matea Perić
- Mediterranean Institute for Life Sciences; Mestrovicevo setaliste 45 21000 Split Croatia
| | - Anita Lovrić
- Mediterranean Institute for Life Sciences; Mestrovicevo setaliste 45 21000 Split Croatia
| | - Ana Šarić
- Division of Molecular Medicine; Rudjer Boskovic Institute; Bijenicka 54 10000 Zagreb Croatia
| | - Marina Musa
- Mediterranean Institute for Life Sciences; Mestrovicevo setaliste 45 21000 Split Croatia
| | - Peter Bou Dib
- Institut für Zellbiochemie; Universitätsmedizin Göttingen; Humboldtallee 23 D-37073 Göttingen Germany
| | - Marina Rudan
- Mediterranean Institute for Life Sciences; Mestrovicevo setaliste 45 21000 Split Croatia
| | - Andrea Nikolić
- Mediterranean Institute for Life Sciences; Mestrovicevo setaliste 45 21000 Split Croatia
| | - Sandra Sobočanec
- Division of Molecular Medicine; Rudjer Boskovic Institute; Bijenicka 54 10000 Zagreb Croatia
| | - Ana-Matea Mikecin
- Division of Molecular Medicine; Rudjer Boskovic Institute; Bijenicka 54 10000 Zagreb Croatia
| | - Sven Dennerlein
- Institut für Zellbiochemie; Universitätsmedizin Göttingen; Humboldtallee 23 D-37073 Göttingen Germany
| | - Ira Milošević
- European Neuroscience Institute; Grisebachstraße 5 37077 Göttingen Germany
| | - Kristian Vlahoviček
- Bioinformatics Group; Division of Biology; Department of Molecular Biology; Faculty of Science; University of Zagreb; Zagreb Croatia
| | - Nuno Raimundo
- Institut für Zellbiochemie; Universitätsmedizin Göttingen; Humboldtallee 23 D-37073 Göttingen Germany
| | - Anita Kriško
- Mediterranean Institute for Life Sciences; Mestrovicevo setaliste 45 21000 Split Croatia
| |
Collapse
|
25
|
McKinstry M, Chung C, Truong H, Johnston BA, Snow JW. The heat shock response and humoral immune response are mutually antagonistic in honey bees. Sci Rep 2017; 7:8850. [PMID: 28821863 PMCID: PMC5562734 DOI: 10.1038/s41598-017-09159-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 07/21/2017] [Indexed: 11/24/2022] Open
Abstract
The honey bee is of paramount importance to humans in both agricultural and ecological settings. Honey bee colonies have suffered from increased attrition in recent years, stemming from complex interacting stresses. Defining common cellular stress responses elicited by these stressors represents a key step in understanding potential synergies. The proteostasis network is a highly conserved network of cellular stress responses involved in maintaining the homeostasis of protein production and function. Here, we have characterized the Heat Shock Response (HSR), one branch of this network, and found that its core components are conserved. In addition, exposing bees to elevated temperatures normally encountered by honey bees during typical activities results in robust HSR induction with increased expression of specific heat shock proteins that was variable across tissues. Surprisingly, we found that heat shock represses multiple immune genes in the abdomen and additionally showed that wounding the cuticle of the abdomen results in decreased expression of multiple HSR genes in proximal and distal tissues. This mutually antagonistic relationship between the HSR and immune activation is unique among invertebrates studied to date and may promote understanding of potential synergistic effects of disparate stresses in this critical pollinator and social insects more broadly.
Collapse
Affiliation(s)
- Mia McKinstry
- Biology Department, Barnard College, New York, NY, 10027, USA
| | - Charlie Chung
- Natural Sciences Department, LaGuardia Community College-CUNY, Long Island City, NY, 11101, USA
| | - Henry Truong
- Biology Department, Barnard College, New York, NY, 10027, USA
| | - Brittany A Johnston
- Biology Department, The City College of New York-CUNY, New York, NY, 10031, USA
| | - Jonathan W Snow
- Biology Department, Barnard College, New York, NY, 10027, USA.
| |
Collapse
|
26
|
Mechanisms Underlying the Essential Role of Mitochondrial Membrane Lipids in Yeast Chronological Aging. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:2916985. [PMID: 28593023 PMCID: PMC5448074 DOI: 10.1155/2017/2916985] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 04/18/2017] [Indexed: 12/12/2022]
Abstract
The functional state of mitochondria is vital to cellular and organismal aging in eukaryotes across phyla. Studies in the yeast Saccharomyces cerevisiae have provided evidence that age-related changes in some aspects of mitochondrial functionality can create certain molecular signals. These signals can then define the rate of cellular aging by altering unidirectional and bidirectional communications between mitochondria and other organelles. Several aspects of mitochondrial functionality are known to impact the replicative and/or chronological modes of yeast aging. They include mitochondrial electron transport, membrane potential, reactive oxygen species, and protein synthesis and proteostasis, as well as mitochondrial synthesis of iron-sulfur clusters, amino acids, and NADPH. Our recent findings have revealed that the composition of mitochondrial membrane lipids is one of the key aspects of mitochondrial functionality affecting yeast chronological aging. We demonstrated that exogenously added lithocholic bile acid can delay chronological aging in yeast because it elicits specific changes in mitochondrial membrane lipids. These changes allow mitochondria to operate as signaling platforms that delay yeast chronological aging by orchestrating an institution and maintenance of a distinct cellular pattern. In this review, we discuss molecular and cellular mechanisms underlying the essential role of mitochondrial membrane lipids in yeast chronological aging.
Collapse
|