1
|
Álvarez-Guerra I, Block E, Broeskamp F, Gabrijelčič S, Infant T, de Ory A, Habernig L, Andréasson C, Levine TP, Höög JL, Büttner S. LDO proteins and Vac8 form a vacuole-lipid droplet contact site to enable starvation-induced lipophagy in yeast. Dev Cell 2024; 59:759-775.e5. [PMID: 38354739 DOI: 10.1016/j.devcel.2024.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 11/15/2023] [Accepted: 01/18/2024] [Indexed: 02/16/2024]
Abstract
Lipid droplets (LDs) are fat storage organelles critical for energy and lipid metabolism. Upon nutrient exhaustion, cells consume LDs via gradual lipolysis or via lipophagy, the en bloc uptake of LDs into the vacuole. Here, we show that LDs dock to the vacuolar membrane via a contact site that is required for lipophagy in yeast. The LD-localized LDO proteins carry an intrinsically disordered region that directly binds vacuolar Vac8 to form vCLIP, the vacuolar-LD contact site. Nutrient limitation drives vCLIP formation, and its inactivation blocks lipophagy, resulting in impaired caloric restriction-induced longevity. We establish a functional link between lipophagy and microautophagy of the nucleus, both requiring Vac8 to form respective contact sites upon metabolic stress. In sum, we identify the tethering machinery of vCLIP and find that Vac8 provides a platform for multiple and competing contact sites associated with autophagy.
Collapse
Affiliation(s)
- Irene Álvarez-Guerra
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 10691 Stockholm, Sweden
| | - Emma Block
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 10691 Stockholm, Sweden
| | - Filomena Broeskamp
- Department of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Sonja Gabrijelčič
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 10691 Stockholm, Sweden
| | - Terence Infant
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 10691 Stockholm, Sweden
| | - Ana de Ory
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 10691 Stockholm, Sweden
| | - Lukas Habernig
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 10691 Stockholm, Sweden
| | - Claes Andréasson
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 10691 Stockholm, Sweden
| | - Tim P Levine
- UCL Institute of Ophthalmology, Bath Street, London EC1V 9EL, UK
| | - Johanna L Höög
- Department of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Sabrina Büttner
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 10691 Stockholm, Sweden.
| |
Collapse
|
2
|
Keuenhof KS, Kohler V, Broeskamp F, Panagaki D, Speese SD, Büttner S, Höög JL. Nuclear envelope budding and its cellular functions. Nucleus 2023; 14:2178184. [PMID: 36814098 PMCID: PMC9980700 DOI: 10.1080/19491034.2023.2178184] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 02/03/2023] [Indexed: 02/24/2023] Open
Abstract
The nuclear pore complex (NPC) has long been assumed to be the sole route across the nuclear envelope, and under normal homeostatic conditions it is indeed the main mechanism of nucleo-cytoplasmic transport. However, it has also been known that e.g. herpesviruses cross the nuclear envelope utilizing a pathway entitled nuclear egress or envelopment/de-envelopment. Despite this, a thread of observations suggests that mechanisms similar to viral egress may be transiently used also in healthy cells. It has since been proposed that mechanisms like nuclear envelope budding (NEB) can facilitate the transport of RNA granules, aggregated proteins, inner nuclear membrane proteins, and mis-assembled NPCs. Herein, we will summarize the known roles of NEB as a physiological and intrinsic cellular feature and highlight the many unanswered questions surrounding these intriguing nuclear events.
Collapse
Affiliation(s)
| | - Verena Kohler
- Institute of Molecular Biosciences, University of Graz, Austria
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Sweden
| | - Filomena Broeskamp
- Department for Chemistry and Molecular biology, University of Gothenburg, Sweden
| | - Dimitra Panagaki
- Department for Chemistry and Molecular biology, University of Gothenburg, Sweden
| | - Sean D. Speese
- Knight Cancer Early Detection Advanced Research Center, Oregon Health and Science University, 2720 S Moody Ave, Portland, OR, 97201, USA
| | - Sabrina Büttner
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Sweden
| | - Johanna L. Höög
- Department for Chemistry and Molecular biology, University of Gothenburg, Sweden
| |
Collapse
|
3
|
Davis J, Meyer T, Smolnig M, Smethurst DG, Neuhaus L, Heyden J, Broeskamp F, Edrich ES, Knittelfelder O, Kolb D, Haar TVD, Gourlay CW, Rockenfeller P. A dynamic actin cytoskeleton is required to prevent constitutive VDAC-dependent MAPK signalling and aberrant lipid homeostasis. iScience 2023; 26:107539. [PMID: 37636069 PMCID: PMC10450525 DOI: 10.1016/j.isci.2023.107539] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 07/14/2023] [Accepted: 07/28/2023] [Indexed: 08/29/2023] Open
Abstract
The dynamic nature of the actin cytoskeleton is required to coordinate many cellular processes, and a loss of its plasticity has been linked to accelerated cell aging and attenuation of adaptive response mechanisms. Cofilin is an actin-binding protein that controls actin dynamics and has been linked to mitochondrial signaling pathways that control drug resistance and cell death. Here we show that cofilin-driven chronic depolarization of the actin cytoskeleton activates cell wall integrity mitogen-activated protein kinase (MAPK) signalling and disrupts lipid homeostasis in a voltage-dependent anion channel (VDAC)-dependent manner. Expression of the cof1-5 mutation, which reduces the dynamic nature of actin, triggers loss of cell wall integrity, vacuole fragmentation, disruption of lipid homeostasis, lipid droplet (LD) accumulation, and the promotion of cell death. The integrity of the actin cytoskeleton is therefore essential to maintain the fidelity of MAPK signaling, lipid homeostasis, and cell health in S. cerevisiae.
Collapse
Affiliation(s)
- Jack Davis
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, Kent, UK
| | - Thorsten Meyer
- Chair of Biochemistry and Molecular Medicine, Center for Biomedical Education and Research (ZBAF), University of Witten/Herdecke (UW/H), Stockumer Str. 10, 58453 Witten, Germany
| | - Martin Smolnig
- Chair of Biochemistry and Molecular Medicine, Center for Biomedical Education and Research (ZBAF), University of Witten/Herdecke (UW/H), Stockumer Str. 10, 58453 Witten, Germany
| | | | - Lisa Neuhaus
- Chair of Biochemistry and Molecular Medicine, Center for Biomedical Education and Research (ZBAF), University of Witten/Herdecke (UW/H), Stockumer Str. 10, 58453 Witten, Germany
| | - Jonas Heyden
- Chair of Biochemistry and Molecular Medicine, Center for Biomedical Education and Research (ZBAF), University of Witten/Herdecke (UW/H), Stockumer Str. 10, 58453 Witten, Germany
| | - Filomena Broeskamp
- Chair of Biochemistry and Molecular Medicine, Center for Biomedical Education and Research (ZBAF), University of Witten/Herdecke (UW/H), Stockumer Str. 10, 58453 Witten, Germany
| | | | - Oskar Knittelfelder
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Dagmar Kolb
- Medical University of Graz, Core Facility Ultrastructure Analysis, Neue Stiftingtalstraße 6/II, 8010 Graz, Austria
- Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging, Division of Cell Biology, Histology and Embryology, Medical University of Graz, Neue Stiftingtalstraße 6/II, 8010 Graz, Austria
| | - Tobias von der Haar
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, Kent, UK
| | - Campbell W. Gourlay
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, Kent, UK
| | - Patrick Rockenfeller
- Chair of Biochemistry and Molecular Medicine, Center for Biomedical Education and Research (ZBAF), University of Witten/Herdecke (UW/H), Stockumer Str. 10, 58453 Witten, Germany
| |
Collapse
|
4
|
Ring J, Tadic J, Ristic S, Poglitsch M, Bergmann M, Radic N, Mossmann D, Liang Y, Maglione M, Jerkovic A, Hajiraissi R, Hanke M, Küttner V, Wolinski H, Zimmermann A, Domuz Trifunović L, Mikolasch L, Moretti DN, Broeskamp F, Westermayer J, Abraham C, Schauer S, Dammbrueck C, Hofer SJ, Abdellatif M, Grundmeier G, Kroemer G, Braun RJ, Hansen N, Sommer C, Ninkovic M, Seba S, Rockenfeller P, Vögtle FN, Dengjel J, Meisinger C, Keller A, Sigrist SJ, Eisenberg T, Madeo F. The HSP40 chaperone Ydj1 drives amyloid beta 42 toxicity. EMBO Mol Med 2022; 14:e13952. [PMID: 35373908 PMCID: PMC9081910 DOI: 10.15252/emmm.202113952] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/12/2022] [Accepted: 02/15/2022] [Indexed: 01/22/2023] Open
Abstract
Amyloid beta 42 (Abeta42) is the principal trigger of neurodegeneration during Alzheimer's disease (AD). However, the etiology of its noxious cellular effects remains elusive. In a combinatory genetic and proteomic approach using a yeast model to study aspects of intracellular Abeta42 toxicity, we here identify the HSP40 family member Ydj1, the yeast orthologue of human DnaJA1, as a crucial factor in Abeta42-mediated cell death. We demonstrate that Ydj1/DnaJA1 physically interacts with Abeta42 (in yeast and mouse), stabilizes Abeta42 oligomers, and mediates their translocation to mitochondria. Consequently, deletion of YDJ1 strongly reduces co-purification of Abeta42 with mitochondria and prevents Abeta42-induced mitochondria-dependent cell death. Consistently, purified DnaJ chaperone delays Abeta42 fibrillization in vitro, and heterologous expression of human DnaJA1 induces formation of Abeta42 oligomers and their deleterious translocation to mitochondria in vivo. Finally, downregulation of the Ydj1 fly homologue, Droj2, improves stress resistance, mitochondrial morphology, and memory performance in a Drosophila melanogaster AD model. These data reveal an unexpected and detrimental role for specific HSP40s in promoting hallmarks of Abeta42 toxicity.
Collapse
Affiliation(s)
- Julia Ring
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Jelena Tadic
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria.,Field of Excellence BioHealth, University of Graz, Graz, Austria
| | - Selena Ristic
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Michael Poglitsch
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Martina Bergmann
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Nemanja Radic
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Dirk Mossmann
- Institute for Biochemistry and Molecular Biology, ZBMZ, Medical Faculty and CIBSS - Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | - YongTian Liang
- NeuroCure Charité Berlin, Berlin, Germany.,Institute for Biology, Freie Universität Berlin, Berlin, Germany
| | - Marta Maglione
- NeuroCure Charité Berlin, Berlin, Germany.,Institute for Biology, Freie Universität Berlin, Berlin, Germany
| | - Andrea Jerkovic
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Roozbeh Hajiraissi
- Technical and Macromolecular Chemistry, Paderborn University, Paderborn, Germany
| | - Marcel Hanke
- Technical and Macromolecular Chemistry, Paderborn University, Paderborn, Germany
| | - Victoria Küttner
- Department of Dermatology, Medical Center, Freiburg Institute for Advanced Studies (FRIAS), University of Freiburg, Freiburg, Germany
| | - Heimo Wolinski
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria.,Field of Excellence BioHealth, University of Graz, Graz, Austria
| | - Andreas Zimmermann
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria.,Field of Excellence BioHealth, University of Graz, Graz, Austria
| | | | - Leonie Mikolasch
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Daiana N Moretti
- Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Filomena Broeskamp
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Julia Westermayer
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Claudia Abraham
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Simon Schauer
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | | | - Sebastian J Hofer
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Mahmoud Abdellatif
- Department of Cardiology, Medical University of Graz, Graz, Austria.,Centre de Recherche des Cordeliers, Equipe labellisée par la Ligue contre le cancer, Université de Paris, Sorbonne Université, Inserm U1138, Institut Universitaire de France, Paris, France.,Metabolomics and Cell Biology Platforms, Institut Gustave Roussy, Villejuif, France
| | - Guido Grundmeier
- Technical and Macromolecular Chemistry, Paderborn University, Paderborn, Germany
| | - Guido Kroemer
- Centre de Recherche des Cordeliers, Equipe labellisée par la Ligue contre le cancer, Université de Paris, Sorbonne Université, Inserm U1138, Institut Universitaire de France, Paris, France.,Metabolomics and Cell Biology Platforms, Institut Gustave Roussy, Villejuif, France.,Institut du Cancer Paris CARPEM, Department of Biology, Hôpital Européen Georges Pompidou, AP-HP, Paris, France
| | - Ralf J Braun
- Research Division for Neurodegenerative Diseases, Center for Biosciences, Department of Medicine, Faculty of Medicine and Dentistry, Danube Private University, Krems, Austria.,Cell Biology, University of Bayreuth, Bayreuth, Germany
| | - Niklas Hansen
- Technical and Macromolecular Chemistry, Paderborn University, Paderborn, Germany
| | - Cornelia Sommer
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Mirjana Ninkovic
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Sandra Seba
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Patrick Rockenfeller
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria.,Chair of Biochemistry and Molecular Medicine, Center for Biomedical Education and Research (ZBAF), University of Witten/Herdecke (UW/H), Witten, Germany
| | - Friederike-Nora Vögtle
- Institute for Biochemistry and Molecular Biology, ZBMZ, Medical Faculty and CIBSS - Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany.,Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany.,Network Aging Research, Heidelberg University, Heidelberg, Germany
| | - Jörn Dengjel
- Department of Dermatology, Medical Center, Freiburg Institute for Advanced Studies (FRIAS), University of Freiburg, Freiburg, Germany.,Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Chris Meisinger
- Institute for Biochemistry and Molecular Biology, ZBMZ, Medical Faculty and CIBSS - Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | - Adrian Keller
- Technical and Macromolecular Chemistry, Paderborn University, Paderborn, Germany
| | - Stephan J Sigrist
- NeuroCure Charité Berlin, Berlin, Germany.,Institute for Biology, Freie Universität Berlin, Berlin, Germany
| | - Tobias Eisenberg
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria.,Field of Excellence BioHealth, University of Graz, Graz, Austria
| | - Frank Madeo
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria.,Field of Excellence BioHealth, University of Graz, Graz, Austria
| |
Collapse
|
5
|
Peselj C, Ebrahimi M, Broeskamp F, Prokisch S, Habernig L, Alvarez-Guerra I, Kohler V, Vögtle FN, Büttner S. Sterol Metabolism Differentially Contributes to Maintenance and Exit of Quiescence. Front Cell Dev Biol 2022; 10:788472. [PMID: 35237594 PMCID: PMC8882848 DOI: 10.3389/fcell.2022.788472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 01/20/2022] [Indexed: 01/01/2023] Open
Abstract
Nutrient starvation initiates cell cycle exit and entry into quiescence, a reversible, non-proliferative state characterized by stress tolerance, longevity and large-scale remodeling of subcellular structures. Depending on the nature of the depleted nutrient, yeast cells are assumed to enter heterogeneous quiescent states with unique but mostly unexplored characteristics. Here, we show that storage and consumption of neutral lipids in lipid droplets (LDs) differentially impacts the regulation of quiescence driven by glucose or phosphate starvation. Upon prolonged glucose exhaustion, LDs were degraded in the vacuole via Atg1-dependent lipophagy. In contrast, yeast cells entering quiescence due to phosphate exhaustion massively over-accumulated LDs that clustered at the vacuolar surface but were not engulfed via lipophagy. Excessive LD biogenesis required contact formation between the endoplasmic reticulum and the vacuole at nucleus-vacuole junctions and was accompanied by a shift of the cellular lipid profile from membrane towards storage lipids, driven by a transcriptional upregulation of enzymes generating neutral lipids, in particular sterol esters. Importantly, sterol ester biogenesis was critical for long-term survival of phosphate-exhausted cells and supported rapid quiescence exit upon nutrient replenishment, but was dispensable for survival and regrowth of glucose-exhausted cells. Instead, these cells relied on de novo synthesis of sterols and fatty acids for quiescence exit and regrowth. Phosphate-exhausted cells efficiently mobilized storage lipids to support several rounds of cell division even in presence of inhibitors of fatty acid and sterol biosynthesis. In sum, our results show that neutral lipid biosynthesis and mobilization to support quiescence maintenance and exit is tailored to the respective nutrient scarcity.
Collapse
Affiliation(s)
- Carlotta Peselj
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Mahsa Ebrahimi
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Filomena Broeskamp
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Simon Prokisch
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Lukas Habernig
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Irene Alvarez-Guerra
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Verena Kohler
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - F.-Nora Vögtle
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg University, Heidelberg, Germany
- Network Aging Research, Heidelberg University, Heidelberg, Germany
- CIBSS - Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | - Sabrina Büttner
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| |
Collapse
|
6
|
Ebrahimi M, Habernig L, Broeskamp F, Aufschnaiter A, Diessl J, Atienza I, Matz S, Ruiz FA, Büttner S. Phosphate Restriction Promotes Longevity via Activation of Autophagy and the Multivesicular Body Pathway. Cells 2021; 10:3161. [PMID: 34831384 PMCID: PMC8620443 DOI: 10.3390/cells10113161] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 01/05/2023] Open
Abstract
Nutrient limitation results in an activation of autophagy in organisms ranging from yeast, nematodes and flies to mammals. Several evolutionary conserved nutrient-sensing kinases are critical for efficient adaptation of yeast cells to glucose, nitrogen or phosphate depletion, subsequent cell-cycle exit and the regulation of autophagy. Here, we demonstrate that phosphate restriction results in a prominent extension of yeast lifespan that requires the coordinated activity of autophagy and the multivesicular body pathway, enabling efficient turnover of cytoplasmic and plasma membrane cargo. While the multivesicular body pathway was essential during the early days of aging, autophagy contributed to long-term survival at later days. The cyclin-dependent kinase Pho85 was critical for phosphate restriction-induced autophagy and full lifespan extension. In contrast, when cell-cycle exit was triggered by exhaustion of glucose instead of phosphate, Pho85 and its cyclin, Pho80, functioned as negative regulators of autophagy and lifespan. The storage of phosphate in form of polyphosphate was completely dispensable to in sustaining viability under phosphate restriction. Collectively, our results identify the multifunctional, nutrient-sensing kinase Pho85 as critical modulator of longevity that differentially coordinates the autophagic response to distinct kinds of starvation.
Collapse
Affiliation(s)
- Mahsa Ebrahimi
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden; (M.E.); (L.H.); (F.B.); (J.D.); (S.M.)
| | - Lukas Habernig
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden; (M.E.); (L.H.); (F.B.); (J.D.); (S.M.)
| | - Filomena Broeskamp
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden; (M.E.); (L.H.); (F.B.); (J.D.); (S.M.)
| | - Andreas Aufschnaiter
- Department of Biochemistry and Biophysics, Stockholm University, 106 91 Stockholm, Sweden;
| | - Jutta Diessl
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden; (M.E.); (L.H.); (F.B.); (J.D.); (S.M.)
| | - Isabel Atienza
- Instituto de Investigación e Innovación Biomédica de Cádiz (INIBICA), University of Cadiz, 11001 Cadiz, Spain; (I.A.); (F.A.R.)
| | - Steffen Matz
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden; (M.E.); (L.H.); (F.B.); (J.D.); (S.M.)
| | - Felix A. Ruiz
- Instituto de Investigación e Innovación Biomédica de Cádiz (INIBICA), University of Cadiz, 11001 Cadiz, Spain; (I.A.); (F.A.R.)
| | - Sabrina Büttner
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden; (M.E.); (L.H.); (F.B.); (J.D.); (S.M.)
- Institute of Molecular Biosciences, University of Graz, 8010 Graz, Austria
| |
Collapse
|
7
|
Habernig L, Broeskamp F, Aufschnaiter A, Diessl J, Peselj C, Urbauer E, Eisenberg T, de Ory A, Büttner S. Ca2+ administration prevents α-synuclein proteotoxicity by stimulating calcineurin-dependent lysosomal proteolysis. PLoS Genet 2021; 17:e1009911. [PMID: 34780474 PMCID: PMC8629384 DOI: 10.1371/journal.pgen.1009911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 11/29/2021] [Accepted: 10/25/2021] [Indexed: 12/02/2022] Open
Abstract
The capacity of a cell to maintain proteostasis progressively declines during aging. Virtually all age-associated neurodegenerative disorders associated with aggregation of neurotoxic proteins are linked to defects in the cellular proteostasis network, including insufficient lysosomal hydrolysis. Here, we report that proteotoxicity in yeast and Drosophila models for Parkinson's disease can be prevented by increasing the bioavailability of Ca2+, which adjusts intracellular Ca2+ handling and boosts lysosomal proteolysis. Heterologous expression of human α-synuclein (αSyn), a protein critically linked to Parkinson's disease, selectively increases total cellular Ca2+ content, while the levels of manganese and iron remain unchanged. Disrupted Ca2+ homeostasis results in inhibition of the lysosomal protease cathepsin D and triggers premature cellular and organismal death. External administration of Ca2+ reduces αSyn oligomerization, stimulates cathepsin D activity and in consequence restores survival, which critically depends on the Ca2+/calmodulin-dependent phosphatase calcineurin. In flies, increasing the availability of Ca2+ discloses a neuroprotective role of αSyn upon manganese overload. In sum, we establish a molecular interplay between cathepsin D and calcineurin that can be activated by Ca2+ administration to counteract αSyn proteotoxicity.
Collapse
Affiliation(s)
- Lukas Habernig
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Filomena Broeskamp
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Andreas Aufschnaiter
- Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden
| | - Jutta Diessl
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Carlotta Peselj
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Elisabeth Urbauer
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Tobias Eisenberg
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
- BioTechMed Graz, Graz, Austria
- Field of Excellence BioHealth–University of Graz, Graz, Austria
| | - Ana de Ory
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Sabrina Büttner
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| |
Collapse
|
8
|
Mitchell SJ, Madrigal-Matute J, Scheibye-Knudsen M, Fang E, Aon M, González-Reyes JA, Cortassa S, Kaushik S, Gonzalez-Freire M, Patel B, Wahl D, Ali A, Calvo-Rubio M, Burón MI, Guiterrez V, Ward TM, Palacios HH, Cai H, Frederick DW, Hine C, Broeskamp F, Habering L, Dawson J, Beasley TM, Wan J, Ikeno Y, Hubbard G, Becker KG, Zhang Y, Bohr VA, Longo DL, Navas P, Ferrucci L, Sinclair DA, Cohen P, Egan JM, Mitchell JR, Baur JA, Allison DB, Anson RM, Villalba JM, Madeo F, Cuervo AM, Pearson KJ, Ingram DK, Bernier M, de Cabo R. Effects of Sex, Strain, and Energy Intake on Hallmarks of Aging in Mice. Cell Metab 2016; 23:1093-1112. [PMID: 27304509 PMCID: PMC4911707 DOI: 10.1016/j.cmet.2016.05.027] [Citation(s) in RCA: 288] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 05/27/2016] [Accepted: 05/31/2016] [Indexed: 01/10/2023]
Abstract
Calorie restriction (CR) is the most robust non-genetic intervention to delay aging. However, there are a number of emerging experimental variables that alter CR responses. We investigated the role of sex, strain, and level of CR on health and survival in mice. CR did not always correlate with lifespan extension, although it consistently improved health across strains and sexes. Transcriptional and metabolomics changes driven by CR in liver indicated anaplerotic filling of the Krebs cycle together with fatty acid fueling of mitochondria. CR prevented age-associated decline in the liver proteostasis network while increasing mitochondrial number, preserving mitochondrial ultrastructure and function with age. Abrogation of mitochondrial function negated life-prolonging effects of CR in yeast and worms. Our data illustrate the complexity of CR in the context of aging, with a clear separation of outcomes related to health and survival, highlighting complexities of translation of CR into human interventions.
Collapse
Affiliation(s)
- Sarah J Mitchell
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Julio Madrigal-Matute
- Department of Developmental and Molecular Biology, Institute for Aging Studies, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Morten Scheibye-Knudsen
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA; Laboratory of Molecular Gerontology, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA; Department of Cellular and Molecular Medicine, Center for Healthy Aging, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Evandro Fang
- Laboratory of Molecular Gerontology, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Miguel Aon
- Laboratory of Cardiovascular Science, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - José A González-Reyes
- Department of Cell Biology, Physiology and Immunology, University of Córdoba, Agrifood Campus of International Excellence, ceiA3, 14071 Córdoba, Spain
| | - Sonia Cortassa
- Laboratory of Cardiovascular Science, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Susmita Kaushik
- Department of Developmental and Molecular Biology, Institute for Aging Studies, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Marta Gonzalez-Freire
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Bindi Patel
- Department of Developmental and Molecular Biology, Institute for Aging Studies, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Devin Wahl
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Ahmed Ali
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Miguel Calvo-Rubio
- Department of Cell Biology, Physiology and Immunology, University of Córdoba, Agrifood Campus of International Excellence, ceiA3, 14071 Córdoba, Spain
| | - María I Burón
- Department of Cell Biology, Physiology and Immunology, University of Córdoba, Agrifood Campus of International Excellence, ceiA3, 14071 Córdoba, Spain
| | - Vincent Guiterrez
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Theresa M Ward
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Hector H Palacios
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Huan Cai
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - David W Frederick
- Department of Physiology, Institute for Diabetes, Obesity, and Metabolism, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Christopher Hine
- Department of Genetics and Complex Diseases, Harvard University, Boston, MA 02115, USA
| | - Filomena Broeskamp
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, and BioTechMed Graz, 8010 Graz, Austria
| | - Lukas Habering
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, and BioTechMed Graz, 8010 Graz, Austria
| | - John Dawson
- Department of Biostatistics, University of Alabama, Birmingham, AL 35294, USA; GRECC, Birmingham/Atlanta Veterans Administration Hospital, Birmingham, AL 35294, USA
| | - T Mark Beasley
- Department of Biostatistics, University of Alabama, Birmingham, AL 35294, USA; GRECC, Birmingham/Atlanta Veterans Administration Hospital, Birmingham, AL 35294, USA
| | - Junxiang Wan
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA 90089, USA
| | - Yuji Ikeno
- Barshop Institute for Longevity and Aging Studies, University of Texas Health Science Center at San Antonio, San Antonio, TX 78245-3207, USA
| | - Gene Hubbard
- Barshop Institute for Longevity and Aging Studies, University of Texas Health Science Center at San Antonio, San Antonio, TX 78245-3207, USA
| | - Kevin G Becker
- Laboratory of Genetics, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Yongqing Zhang
- Laboratory of Genetics, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Vilhelm A Bohr
- Laboratory of Molecular Gerontology, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Dan L Longo
- Laboratory of Genetics, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Placido Navas
- Centro Andaluz de Biologia del Desarrollo, and CIBERER, Instituto de Salud Carlos III, Universidad Pablo de Olavide-CSIC, 41013 Sevilla, Spain
| | - Luigi Ferrucci
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - David A Sinclair
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Pinchas Cohen
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA 90089, USA
| | - Josephine M Egan
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - James R Mitchell
- Department of Genetics and Complex Diseases, Harvard University, Boston, MA 02115, USA
| | - Joseph A Baur
- Department of Physiology, Institute for Diabetes, Obesity, and Metabolism, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - David B Allison
- Department of Biostatistics, University of Alabama, Birmingham, AL 35294, USA; GRECC, Birmingham/Atlanta Veterans Administration Hospital, Birmingham, AL 35294, USA
| | - R Michael Anson
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - José M Villalba
- Department of Cell Biology, Physiology and Immunology, University of Córdoba, Agrifood Campus of International Excellence, ceiA3, 14071 Córdoba, Spain
| | - Frank Madeo
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, and BioTechMed Graz, 8010 Graz, Austria
| | - Ana Maria Cuervo
- Department of Developmental and Molecular Biology, Institute for Aging Studies, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Kevin J Pearson
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA; Graduate Center for Nutritional Sciences, University of Kentucky, C.T. Wethington Building, Room 591, 900 South Limestone, Lexington, KY 40536, USA
| | - Donald K Ingram
- Pennington Biomedical Research Center, Baton Rouge, LA 70809, USA
| | - Michel Bernier
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA
| | - Rafael de Cabo
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, NIH, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, USA.
| |
Collapse
|
9
|
Büttner S, Broeskamp F, Sommer C, Markaki M, Habernig L, Alavian-Ghavanini A, Carmona-Gutierrez D, Eisenberg T, Michael E, Kroemer G, Tavernarakis N, Sigrist SJ, Madeo F. Spermidine protects against α-synuclein neurotoxicity. Cell Cycle 2015; 13:3903-8. [PMID: 25483063 PMCID: PMC4614020 DOI: 10.4161/15384101.2014.973309] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
As our society ages, neurodegenerative disorders like Parkinson`s disease (PD) are increasing in pandemic proportions. While mechanistic understanding of PD is advancing, a treatment with well tolerable drugs is still elusive. Here, we show that administration of the naturally occurring polyamine spermidine, which declines continuously during aging in various species, alleviates a series of PD-related degenerative processes in the fruit fly Drosophila melanogaster and the nematode Caenorhabditis elegans, two established model systems for PD pathology. In the fruit fly, simple feeding with spermidine inhibited loss of climbing activity and early organismal death upon heterologous expression of human α-synuclein, which is thought to be the principal toxic trigger of PD. In this line, administration of spermidine rescued α-synuclein-induced loss of dopaminergic neurons, a hallmark of PD, in nematodes. Alleviation of PD-related neurodegeneration by spermidine was accompanied by induction of autophagy, suggesting that this cytoprotective process may be responsible for the beneficial effects of spermidine administration.
Collapse
Affiliation(s)
- Sabrina Büttner
- a Institute of Molecular Biosciences ; University of Graz ; Graz , Austria
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|