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Amin A, Perera ND, Tomas D, Cuic B, Radwan M, Hatters DM, Turner BJ, Shabanpoor F. Systemic administration of a novel Beclin 1-derived peptide significantly upregulates autophagy in the spinal motor neurons of autophagy reporter mice. Int J Pharm 2024; 659:124198. [PMID: 38816263 DOI: 10.1016/j.ijpharm.2024.124198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/09/2024] [Accepted: 05/01/2024] [Indexed: 06/01/2024]
Abstract
Autophagy, an intracellular degradation system, plays a vital role in protecting cells by clearing damaged organelles, pathogens, and protein aggregates. Autophagy upregulation through pharmacological interventions has gained significant attention as a potential therapeutic avenue for proteinopathies. Here, we report the development of an autophagy-inducing peptide (BCN4) derived from the Beclin 1 protein, the master regulator of autophagy. To deliver the BCN4 into cells and the central nervous system (CNS), it was conjugated to our previously developed cell and blood-brain barrier-penetrating peptide (CPP). CPP-BCN4 significantly upregulated autophagy and reduced protein aggregates in motor neuron (MN)-like cells. Moreover, its systemic administration in a reporter mouse model of autophagy resulted in a significant increase in autophagy activity in the spinal MNs. Therefore, this novel autophagy-inducing peptide with a demonstrated ability to upregulate autophagy in the CNS has significant potential for the treatment of various neurodegenerative diseases with protein aggregates as a characteristic feature.
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Affiliation(s)
- Azin Amin
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville 3010, VIC, Australia
| | - Nirma D Perera
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville 3010, VIC, Australia
| | - Doris Tomas
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville 3010, VIC, Australia
| | - Brittany Cuic
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville 3010, VIC, Australia
| | - Mona Radwan
- Walter and Eliza Hall Institute of Medical Research, University of Melbourne, Parkville 3010, VIC, Australia
| | - Danny M Hatters
- Department of Biochemistry and Pharmacology and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville 3010, VIC, Australia
| | - Bradley J Turner
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville 3010, VIC, Australia
| | - Fazel Shabanpoor
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville 3010, VIC, Australia; School of Chemistry, University of Melbourne, VIC 3010, Australia.
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2
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Wilson KA, Bar S, Dammer EB, Carrera EM, Hodge BA, Hilsabeck TAU, Bons J, Brownridge GW, Beck JN, Rose J, Granath-Panelo M, Nelson CS, Qi G, Gerencser AA, Lan J, Afenjar A, Chawla G, Brem RB, Campeau PM, Bellen HJ, Schilling B, Seyfried NT, Ellerby LM, Kapahi P. OXR1 maintains the retromer to delay brain aging under dietary restriction. Nat Commun 2024; 15:467. [PMID: 38212606 PMCID: PMC10784588 DOI: 10.1038/s41467-023-44343-3] [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: 08/02/2023] [Accepted: 12/07/2023] [Indexed: 01/13/2024] Open
Abstract
Dietary restriction (DR) delays aging, but the mechanism remains unclear. We identified polymorphisms in mtd, the fly homolog of OXR1, which influenced lifespan and mtd expression in response to DR. Knockdown in adulthood inhibited DR-mediated lifespan extension in female flies. We found that mtd/OXR1 expression declines with age and it interacts with the retromer, which regulates trafficking of proteins and lipids. Loss of mtd/OXR1 destabilized the retromer, causing improper protein trafficking and endolysosomal defects. Overexpression of retromer genes or pharmacological restabilization with R55 rescued lifespan and neurodegeneration in mtd-deficient flies and endolysosomal defects in fibroblasts from patients with lethal loss-of-function of OXR1 variants. Multi-omic analyses in flies and humans showed that decreased Mtd/OXR1 is associated with aging and neurological diseases. mtd/OXR1 overexpression rescued age-related visual decline and tauopathy in a fly model. Hence, OXR1 plays a conserved role in preserving retromer function and is critical for neuronal health and longevity.
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Affiliation(s)
- Kenneth A Wilson
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, 90089, USA
| | - Sudipta Bar
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
| | - Eric B Dammer
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | | | - Brian A Hodge
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
| | - Tyler A U Hilsabeck
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, 90089, USA
| | - Joanna Bons
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
| | | | - Jennifer N Beck
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
| | - Jacob Rose
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
| | | | | | - Grace Qi
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
| | | | - Jianfeng Lan
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
- Guanxi Key Laboratory of Molecular Medicine in Liver Injury and Repair, The Afilliated Hospital of Guilin Medican University, Guilin, 541001, Guanxi, China
| | - Alexandra Afenjar
- Assistance Publique des Hôpitaux de Paris, Unité de Génétique Clinique, Hôpital Armand Trousseau, Groupe Hospitalier Universitaire, Paris, 75012, France
- Département de Génétique et Embryologie Médicale, CRMR des Malformations et Maladies Congénitales du Cervelet, GRC ConCer-LD, Sorbonne Universités, Hôpital Trousseau, Paris, 75012, France
| | - Geetanjali Chawla
- RNA Biology Laboratory, Department of Life Sciences, School of Natural Sciences, Shiv Nadar Institute of Eminence, NH91, Tehsil Dadri, G. B. Nagar, 201314, Uttar Pradesh, India
| | - Rachel B Brem
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, 90089, USA
- Department of Plant and Microbial Biology, University of California, Berkeley, 111 Koshland Hall, Berkeley, CA, 94720, USA
| | - Philippe M Campeau
- Centre Hospitalier Universitaire Saint-Justine Research Center, CHU Sainte-Justine, Montreal, QC, H3T 1J4, Canada
| | - Hugo J Bellen
- Departments of Molecular and Human Genetics and Neuroscience, Neurological Research Institute, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, 77030, USA
| | | | - Nicholas T Seyfried
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Lisa M Ellerby
- Buck Institute for Research on Aging, Novato, CA, 94945, USA.
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, 90089, USA.
| | - Pankaj Kapahi
- Buck Institute for Research on Aging, Novato, CA, 94945, USA.
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, 90089, USA.
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3
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Meindl K, Issler N, Afonso S, Cebrian-Serrano A, Müller K, Sterner C, Othmen H, Tegtmeier I, Witzgall R, Klootwijk E, Davies B, Kleta R, Warth R. A missense mutation in Ehd1 associated with defective spermatogenesis and male infertility. Front Cell Dev Biol 2023; 11:1240558. [PMID: 37900275 PMCID: PMC10600459 DOI: 10.3389/fcell.2023.1240558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 09/28/2023] [Indexed: 10/31/2023] Open
Abstract
Normal function of the C-terminal Eps15 homology domain-containing protein 1 (EHD1) has previously been associated with endocytic vesicle trafficking, shaping of intracellular membranes, and ciliogenesis. We recently identified an autosomal recessive missense mutation c.1192C>T (p.R398W) of EHD1 in patients who had low molecular weight proteinuria (0.7-2.1 g/d) and high-frequency hearing loss. It was already known from Ehd1 knockout mice that inactivation of Ehd1 can lead to male infertility. However, the exact role of the EHD1 protein and its p.R398W mutant during spermatogenesis remained still unclear. Here, we report the testicular phenotype of a knockin mouse model carrying the p.R398W mutation in the EHD1 protein. Male homozygous knockin mice were infertile, whereas the mutation had no effect on female fertility. Testes and epididymes were significantly reduced in size and weight. The testicular epithelium appeared profoundly damaged and had a disorganized architecture. The composition of developing cell types was altered. Malformed acrosomes covered underdeveloped and misshaped sperm heads. In the sperm tail, midpieces were largely missing indicating disturbed assembly of the sperm tail. Defective structures, i.e., nuclei, acrosomes, and sperm tail midpieces, were observed in large vacuoles scattered throughout the epithelium. Interestingly, cilia formation itself did not appear to be affected, as the axoneme and other parts of the sperm tails except the midpieces appeared to be intact. In wildtype mice, EHD1 co-localized with acrosomal granules on round spermatids, suggesting a role of the EHD1 protein during acrosomal development. Wildtype EHD1 also co-localized with the VPS35 component of the retromer complex, whereas the p.R398W mutant did not. The testicular pathologies appeared very early during the first spermatogenic wave in young mice (starting at 14 dpp) and tubular destruction worsened with age. Taken together, EHD1 plays an important and probably multifaceted role in spermatogenesis in mice. Therefore, EHD1 may also be a hitherto underestimated infertility gene in humans.
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Affiliation(s)
- Katrin Meindl
- Medical Cell Biology, University Regensburg, Regensburg, Germany
| | - Naomi Issler
- Department of Renal Medicine, University College London, London, United Kingdom
- Pediatric Nephrology Unit and Research Lab, Hadassah Medical Center and Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Sara Afonso
- Medical Cell Biology, University Regensburg, Regensburg, Germany
- Institute of Cellular and Molecular Physiology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Alberto Cebrian-Serrano
- Wellcome Centre for Human Genetics, University Oxford, Oxford, United Kingdom
- Helmholtz Zentrum München, Institute of Diabetes and Obesity, Munich, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Karin Müller
- Leibniz Institute for Zoo- und Wildlife Research, Berlin, Germany
| | | | - Helga Othmen
- Medical Cell Biology, University Regensburg, Regensburg, Germany
- Molecular and Cellular Anatomy, University Regensburg, Regensburg, Germany
| | - Ines Tegtmeier
- Medical Cell Biology, University Regensburg, Regensburg, Germany
| | - Ralph Witzgall
- Molecular and Cellular Anatomy, University Regensburg, Regensburg, Germany
| | - Enriko Klootwijk
- Department of Renal Medicine, University College London, London, United Kingdom
| | - Benjamin Davies
- Wellcome Centre for Human Genetics, University Oxford, Oxford, United Kingdom
- Genetic Modification Service, The Francis Crick Institute, London, United Kingdom
| | - Robert Kleta
- Department of Renal Medicine, University College London, London, United Kingdom
| | - Richard Warth
- Medical Cell Biology, University Regensburg, Regensburg, Germany
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4
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Mulligan RJ, Winckler B. Regulation of Endosomal Trafficking by Rab7 and Its Effectors in Neurons: Clues from Charcot-Marie-Tooth 2B Disease. Biomolecules 2023; 13:1399. [PMID: 37759799 PMCID: PMC10527268 DOI: 10.3390/biom13091399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 09/09/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
Intracellular endosomal trafficking controls the balance between protein degradation and synthesis, i.e., proteostasis, but also many of the cellular signaling pathways that emanate from activated growth factor receptors after endocytosis. Endosomal trafficking, sorting, and motility are coordinated by the activity of small GTPases, including Rab proteins, whose function as molecular switches direct activity at endosomal membranes through effector proteins. Rab7 is particularly important in the coordination of the degradative functions of the pathway. Rab7 effectors control endosomal maturation and the properties of late endosomal and lysosomal compartments, such as coordination of recycling, motility, and fusion with downstream compartments. The spatiotemporal regulation of endosomal receptor trafficking is particularly challenging in neurons because of their enormous size, their distinct intracellular domains with unique requirements (dendrites vs. axons), and their long lifespans as postmitotic, differentiated cells. In Charcot-Marie-Tooth 2B disease (CMT2B), familial missense mutations in Rab7 cause alterations in GTPase cycling and trafficking, leading to an ulcero-mutilating peripheral neuropathy. The prevailing hypothesis to account for CMT2B pathologies is that CMT2B-associated Rab7 alleles alter endocytic trafficking of the neurotrophin NGF and its receptor TrkA and, thereby, disrupt normal trophic signaling in the peripheral nervous system, but other Rab7-dependent pathways are also impacted. Here, using TrkA as a prototypical endocytic cargo, we review physiologic Rab7 effector interactions and control in neurons. Since neurons are among the largest cells in the body, we place particular emphasis on the temporal and spatial regulation of endosomal sorting and trafficking in neuronal processes. We further discuss the current findings in CMT2B mutant Rab7 models, the impact of mutations on effector interactions or balance, and how this dysregulation may confer disease.
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Affiliation(s)
- Ryan J. Mulligan
- Department of Cell Biology, University of Virginia, Charlottesville, VA 22903, USA
- Medical Scientist Training Program, University of Virginia, Charlottesville, VA 22903, USA
| | - Bettina Winckler
- Department of Cell Biology, University of Virginia, Charlottesville, VA 22903, USA
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Hwang M, Jun DW, Song BR, Shim H, Lee CH, Kim S. Ataxia-Telangiectasia Mutated Is Involved in Autolysosome Formation. Biomol Ther (Seoul) 2023; 31:559-565. [PMID: 36941082 PMCID: PMC10468418 DOI: 10.4062/biomolther.2023.003] [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: 01/07/2023] [Revised: 02/15/2023] [Accepted: 02/22/2023] [Indexed: 03/23/2023] Open
Abstract
Ataxia-telangiectasia mutated (ATM), a master kinase of the DNA damage response (DDR), phosphorylates a multitude of substrates to activate signaling pathways after DNA double-strand breaks (DSBs). ATM inhibitors have been evaluated as anticancer drugs to potentiate the cytotoxicity of DNA damage-based cancer therapy. ATM is also involved in autophagy, a conserved cellular process that maintains homeostasis by degrading unnecessary proteins and dysfunctional organelles. In this study, we report that ATM inhibitors (KU-55933 and KU-60019) provoked accumulation of autophagosomes and p62 and restrained autolysosome formation. Under autophagy-inducing conditions, the ATM inhibitors caused excessive autophagosome accumulation and cell death. This new function of ATM in autophagy was also observed in numerous cell lines. Repression of ATM expression using an siRNA inhibited autophagic flux at the autolysosome formation step and induced cell death under autophagy-inducing conditions. Taken together, our results suggest that ATM is involved in autolysosome formation and that the use of ATM inhibitors in cancer therapy may be expanded.
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Affiliation(s)
- Mihwa Hwang
- Research Institute, National Cancer Center, Goyang 10408, Republic of Korea
| | - Dong Wha Jun
- Research Institute, National Cancer Center, Goyang 10408, Republic of Korea
| | - Bo Ram Song
- Research Institute, National Cancer Center, Goyang 10408, Republic of Korea
| | - Hanna Shim
- Research Institute, National Cancer Center, Goyang 10408, Republic of Korea
| | - Chang-Hun Lee
- Research Institute, National Cancer Center, Goyang 10408, Republic of Korea
| | - Sunshin Kim
- Research Institute, National Cancer Center, Goyang 10408, Republic of Korea
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Tong R, Ding X, Liu F, Li H, Liu H, Song H, Wang Y, Zhang X, Liu S, Sun T. Classification of subtypes and identification of dysregulated genes in sepsis. Front Cell Infect Microbiol 2023; 13:1226159. [PMID: 37671148 PMCID: PMC10475835 DOI: 10.3389/fcimb.2023.1226159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 08/07/2023] [Indexed: 09/07/2023] Open
Abstract
Background Sepsis is a clinical syndrome with high mortality. Subtype identification in sepsis is meaningful for improving the diagnosis and treatment of patients. The purpose of this research was to identify subtypes of sepsis using RNA-seq datasets and further explore key genes that were deregulated during the development of sepsis. Methods The datasets GSE95233 and GSE13904 were obtained from the Gene Expression Omnibus database. Differential analysis of the gene expression matrix was performed between sepsis patients and healthy controls. Intersection analysis of differentially expressed genes was applied to identify common differentially expressed genes for enrichment analysis and gene set variation analysis. Obvious differential pathways between sepsis patients and healthy controls were identified, as were developmental stages during sepsis. Then, key dysregulated genes were revealed by short time-series analysis and the least absolute shrinkage and selection operator model. In addition, the MCPcounter package was used to assess infiltrating immunocytes. Finally, the dysregulated genes identified were verified using 69 clinical samples. Results A total of 898 common differentially expressed genes were obtained, which were chiefly related to increased metabolic responses and decreased immune responses. The two differential pathways (angiogenesis and myc targets v2) were screened on the basis of gene set variation analysis scores. Four subgroups were identified according to median expression of angiogenesis and myc target v2 genes: normal, myc target v2, mixed-quiescent, and angiogenesis. The genes CHPT1, CPEB4, DNAJC3, MAFG, NARF, SNX3, S100A9, S100A12, and METTL9 were recognized as being progressively dysregulated in sepsis. Furthermore, most types of immune cells showed low infiltration in sepsis patients and had a significant correlation with the key genes. Importantly, all nine key genes were highly expressed in sepsis patients. Conclusion This study revealed novel insight into sepsis subtypes and identified nine dysregulated genes associated with immune status in the development of sepsis. This study provides potential molecular targets for the diagnosis and treatment of sepsis.
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Affiliation(s)
- Ran Tong
- General Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Henan Engineering Research Center for Critical Care Medicine, Zhengzhou, Henan, China
- Zhengzhou Key Laboratory of Sepsis, Zhengzhou, Henan, China
- Academy of Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China
| | - Xianfei Ding
- General Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Henan Engineering Research Center for Critical Care Medicine, Zhengzhou, Henan, China
- Zhengzhou Key Laboratory of Sepsis, Zhengzhou, Henan, China
| | - Fengyu Liu
- General Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Henan Engineering Research Center for Critical Care Medicine, Zhengzhou, Henan, China
- Zhengzhou Key Laboratory of Sepsis, Zhengzhou, Henan, China
| | - Hongyi Li
- General Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Henan Engineering Research Center for Critical Care Medicine, Zhengzhou, Henan, China
- Zhengzhou Key Laboratory of Sepsis, Zhengzhou, Henan, China
| | - Huan Liu
- General Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Henan Engineering Research Center for Critical Care Medicine, Zhengzhou, Henan, China
- Zhengzhou Key Laboratory of Sepsis, Zhengzhou, Henan, China
| | - Heng Song
- General Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Henan Engineering Research Center for Critical Care Medicine, Zhengzhou, Henan, China
- Zhengzhou Key Laboratory of Sepsis, Zhengzhou, Henan, China
- Academy of Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China
| | - Yuze Wang
- General Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Henan Engineering Research Center for Critical Care Medicine, Zhengzhou, Henan, China
- Zhengzhou Key Laboratory of Sepsis, Zhengzhou, Henan, China
| | - Xiaojuan Zhang
- General Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Henan Engineering Research Center for Critical Care Medicine, Zhengzhou, Henan, China
- Zhengzhou Key Laboratory of Sepsis, Zhengzhou, Henan, China
| | - Shaohua Liu
- General Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Henan Engineering Research Center for Critical Care Medicine, Zhengzhou, Henan, China
- Zhengzhou Key Laboratory of Sepsis, Zhengzhou, Henan, China
| | - Tongwen Sun
- General Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Henan Engineering Research Center for Critical Care Medicine, Zhengzhou, Henan, China
- Zhengzhou Key Laboratory of Sepsis, Zhengzhou, Henan, China
- Academy of Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China
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Demir E, Kacew S. Drosophila as a Robust Model System for Assessing Autophagy: A Review. TOXICS 2023; 11:682. [PMID: 37624187 PMCID: PMC10458868 DOI: 10.3390/toxics11080682] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 08/07/2023] [Accepted: 08/07/2023] [Indexed: 08/26/2023]
Abstract
Autophagy is the process through which a body breaks down and recycles its own cellular components, primarily inside lysosomes. It is a cellular response to starvation and stress, which plays decisive roles in various biological processes such as senescence, apoptosis, carcinoma, and immune response. Autophagy, which was first discovered as a survival mechanism during starvation in yeast, is now known to serve a wide range of functions in more advanced organisms. It plays a vital role in how cells respond to stress, starvation, and infection. While research on yeast has led to the identification of many key components of the autophagy process, more research into autophagy in more complex systems is still warranted. This review article focuses on the use of the fruit fly Drosophila melanogaster as a robust testing model in further research on autophagy. Drosophila provides an ideal environment for exploring autophagy in a living organism during its development. Additionally, Drosophila is a well-suited compact tool for genetic analysis in that it serves as an intermediate between yeast and mammals because evolution conserved the molecular machinery required for autophagy in this species. Experimental tractability of host-pathogen interactions in Drosophila also affords great convenience in modeling human diseases on analogous structures and tissues.
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Affiliation(s)
- Esref Demir
- Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
- F.M. Kirby Neurobiology Center, Boston Children’s Hospital, 300 Longwood Avenue, Boston, MA 02115, USA
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA
- Medical Laboratory Techniques Program, Department of Medical Services and Techniques, Vocational School of Health Services, Antalya Bilim University, 07190 Antalya, Turkey
| | - Sam Kacew
- R. Samuel McLaughllin Center for Population Health Risk Assessment, Institute of Population Health, University of Ottawa, 1 Stewart (320), Ottawa, ON K1N 6N5, Canada;
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Shi TY, Li TE, Hao Y, Sun HC, Fu Y, Yan WC, Hao LL. Molecular characterization and protective efficacy of vacuolar protein sorting 29 from Eimeria tenella. Front Cell Infect Microbiol 2023; 13:1205782. [PMID: 37469602 PMCID: PMC10352494 DOI: 10.3389/fcimb.2023.1205782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 06/14/2023] [Indexed: 07/21/2023] Open
Abstract
Introduction Vacuolar protein sorting 29 (VPS29) is a core component of the retromer-retriever complex and is essential for recycling numerous cell-surface cargoes from endosomes. However, there are no reports yet on VPS29 of Eimeria spp. Methods Here, we cloned and prokaryotically expressed a partial sequence of Eimeria tenella VPS29 (EtVPS29) with RT-PCR and engineered strain of Escherichia coli respectively. The localization of the VPS29 protein in E. tenella sporozoites was investigated with immunofluorescence (IFA) and overexpression assays. And its protective efficacy against E. tenella infection was investigated in chickens with the animal protection test. Results An EtVPS29 gene fragment with an ORF reading frame of 549 bp was cloned. The band size of the expressed recombinant protein, rEtVPS29, was approximately 39 kDa and was recognized by the chicken anti-E. tenella positive serum. EtVPS29 protein was observed widely distributing in the cytoplasm of E. tenella sporozoites in the IFA and overexpression assays. rEtVPS29 significantly increased average body weight gain and decreased mean lesion score and oocyst output in chickens. The relative weight gain rate in the rEtVPS29-immunized group was 62.9%, which was significantly higher than that in the unimmunized and challenged group (P < 0.05). The percentage of reduced oocyst output in the rEtVPS29 immunized group was 32.2%. The anticoccidial index of the rEtVPS29-immunized group was 144.2. Serum ELISA also showed that rEtVPS29 immunization induced high levels of specific antibodies in chickens. Discussion These results suggest that rEtVPS29 can induce a specific immune response and is a potential candidate for the development of novel vaccines against E. tenella infections in chickens.
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Affiliation(s)
- Tuan-yuan Shi
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China
| | - Tian-en Li
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan, China
| | - Yun Hao
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu, Sichuan, China
| | - Hong-chao Sun
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China
| | - Yuan Fu
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China
| | - Wen-chao Yan
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan, China
| | - Li-li Hao
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu, Sichuan, China
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9
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Zhou L, Xue X, Yang K, Feng Z, Liu M, Pastor-Pareja JC. Convergence of secretory, endosomal, and autophagic routes in trans-Golgi-associated lysosomes. J Cell Biol 2022; 222:213547. [PMID: 36239631 PMCID: PMC9577102 DOI: 10.1083/jcb.202203045] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 08/17/2022] [Accepted: 09/23/2022] [Indexed: 12/15/2022] Open
Abstract
At the trans-Golgi, complex traffic connections exist to the endolysosomal system additional to the main Golgi-to-plasma membrane secretory route. Here, we investigated three hits in a Drosophila screen displaying secretory cargo accumulation in autophagic vesicles: ESCRT-III component Vps20, SNARE-binding Rop, and lysosomal pump subunit VhaPPA1-1. We found that Vps20, Rop, and lysosomal markers localize near the trans-Golgi. Furthermore, we document that the vicinity of the trans-Golgi is the main cellular location for lysosomes and that early, late, and recycling endosomes associate as well with a trans-Golgi-associated degradative compartment where basal microautophagy of secretory cargo and other materials occurs. Disruption of this compartment causes cargo accumulation in our hits, including Munc18 homolog Rop, required with Syx1 and Syx4 for Rab11-mediated endosomal recycling. Finally, besides basal microautophagy, we show that the trans-Golgi-associated degradative compartment contributes to the growth of autophagic vesicles in developmental and starvation-induced macroautophagy. Our results argue that the fly trans-Golgi is the gravitational center of the whole endomembrane system.
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Affiliation(s)
- Lingjian Zhou
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Xutong Xue
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Ke Yang
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Zhi Feng
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Min Liu
- School of Life Sciences, Tsinghua University, Beijing, China
| | - José C. Pastor-Pareja
- School of Life Sciences, Tsinghua University, Beijing, China,Tsinghua-Peking Center for Life Sciences, Beijing, China,Institute of Neurosciences, Consejo Superior de Investigaciones Científicas–Universidad Miguel Hernández, San Juan de Alicante, Spain
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10
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Lauzier A, Bossanyi MF, Larcher R, Nassari S, Ugrankar R, Henne WM, Jean S. Snazarus and its human ortholog SNX25 modulate autophagic flux. J Cell Sci 2022; 135:273525. [PMID: 34821359 DOI: 10.1242/jcs.258733] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 11/12/2021] [Indexed: 12/26/2022] Open
Abstract
Macroautophagy, the degradation and recycling of cytosolic components in the lysosome, is an important cellular mechanism. It is a membrane-mediated process that is linked to vesicular trafficking events. The sorting nexin (SNX) protein family controls the sorting of a large array of cargoes, and various SNXs impact autophagy. To improve our understanding of their functions in vivo, we screened all Drosophila SNXs using inducible RNA interference in the fat body. Significantly, depletion of Snazarus (Snz) led to decreased autophagic flux. Interestingly, we observed altered distribution of Vamp7-positive vesicles with Snz depletion, and the roles of Snz were conserved in human cells. SNX25, the closest human ortholog to Snz, regulates both VAMP8 endocytosis and lipid metabolism. Through knockout-rescue experiments, we demonstrate that these activities are dependent on specific SNX25 domains and that the autophagic defects seen upon SNX25 loss can be rescued by ethanolamine addition. We also demonstrate the presence of differentially spliced forms of SNX14 and SNX25 in cancer cells. This work identifies a conserved role for Snz/SNX25 as a regulator of autophagic flux and reveals differential isoform expression between paralogs.
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Affiliation(s)
- Annie Lauzier
- Faculté de Médecine et des Sciences de la Santé, Département d'immunologie et de biologie cellulaire, Université de Sherbrooke, 3201, Rue Jean Mignault, Sherbrooke, Québec, CanadaJ1E 4K8
| | - Marie-France Bossanyi
- Faculté de Médecine et des Sciences de la Santé, Département d'immunologie et de biologie cellulaire, Université de Sherbrooke, 3201, Rue Jean Mignault, Sherbrooke, Québec, CanadaJ1E 4K8
| | - Raphaëlle Larcher
- Faculté de Médecine et des Sciences de la Santé, Département d'immunologie et de biologie cellulaire, Université de Sherbrooke, 3201, Rue Jean Mignault, Sherbrooke, Québec, CanadaJ1E 4K8
| | - Sonya Nassari
- Faculté de Médecine et des Sciences de la Santé, Département d'immunologie et de biologie cellulaire, Université de Sherbrooke, 3201, Rue Jean Mignault, Sherbrooke, Québec, CanadaJ1E 4K8
| | - Rupali Ugrankar
- Department of Cell Biology, UT Southwestern Medical Center, 6000 Hary Lines Boulevard, Dallas, TX 75390, USA
| | - W Mike Henne
- Department of Cell Biology, UT Southwestern Medical Center, 6000 Hary Lines Boulevard, Dallas, TX 75390, USA
| | - Steve Jean
- Faculté de Médecine et des Sciences de la Santé, Département d'immunologie et de biologie cellulaire, Université de Sherbrooke, 3201, Rue Jean Mignault, Sherbrooke, Québec, CanadaJ1E 4K8
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11
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Filippone A, Smith T, Pratico D. Dysregulation of the Retromer Complex in Brain Endothelial Cells Results in Accumulation of Phosphorylated Tau. J Inflamm Res 2022; 14:7455-7465. [PMID: 35002279 PMCID: PMC8721160 DOI: 10.2147/jir.s342096] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 12/16/2021] [Indexed: 01/18/2023] Open
Abstract
Introduction Transport through endothelial cells of the blood–brain barrier (BBB) involves a complex group of structures of the endo-lysosome system such as early and late endosomes, and the retromer complex system. Studies show that neuronal dysregulation of the vacuolar protein sorting 35 (VPS35), the main component of the retromer complex recognition core, results in altered protein trafficking and degradation and is involved in neurodegeneration. Since the functional role of VPS35 in endothelial cells has not been fully investigated, in the present study we aimed at characterizing the effect of its downregulation on these pathways. Methods Genetic silencing of VPS35 in human brain endothelial cells; measurement of retromer complex system proteins, autophagy and ubiquitin-proteasome systems. Results VPS35-downregulated endothelial cells had increased expression of LC3B2/1 and more ubiquitinated products, markers of autophagy flux and impaired proteasome activity, respectively. Additionally, compared with controls VPS35 downregulation resulted in significant accumulation of tau protein and its phosphorylated isoforms. Discussion Our findings demonstrate that in brain endothelial cells retromer complex dysfunction by influencing endosome-lysosome degradation pathways results in altered proteostasis. Restoration of the retromer complex system function should be considered a novel therapeutic approach to rescue endothelial protein transport.
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Affiliation(s)
- Alessia Filippone
- Alzheimer's Center at Temple, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, 19140, USA
| | - Tiffany Smith
- Alzheimer's Center at Temple, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, 19140, USA
| | - Domenico Pratico
- Alzheimer's Center at Temple, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, 19140, USA
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12
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Lakatos Z, Benkő P, Juhász G, Lőrincz P. Drosophila Rab39 Attenuates Lysosomal Degradation. Int J Mol Sci 2021; 22:ijms221910635. [PMID: 34638976 PMCID: PMC8508792 DOI: 10.3390/ijms221910635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 11/16/2022] Open
Abstract
Lysosomal degradation, the common destination of autophagy and endocytosis, is one of the most important elements of eukaryotic metabolism. The small GTPases Rab39A and B are potential new effectors of this pathway, as their malfunction is implicated in severe human diseases like cancer and neurodegeneration. In this study, the lysosomal regulatory role of the single Drosophila Rab39 ortholog was characterized, providing valuable insight into the potential cell biological mechanisms mediated by these proteins. Using a de novo CRISPR-generated rab39 mutant, we found no failure in the early steps of endocytosis and autophagy. On the contrary, we found that Rab39 mutant nephrocytes internalize and degrade endocytic cargo at a higher rate compared to control cells. In addition, Rab39 mutant fat body cells contain small yet functional autolysosomes without lysosomal fusion defect. Our data identify Drosophila Rab39 as a negative regulator of lysosomal clearance during both endocytosis and autophagy.
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Affiliation(s)
- Zsolt Lakatos
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary; (Z.L.); (P.B.)
| | - Péter Benkő
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary; (Z.L.); (P.B.)
- Department of Physiology, Semmelweis University, H-1094 Budapest, Hungary
| | - Gábor Juhász
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary; (Z.L.); (P.B.)
- Biological Research Centre, Institute of Genetics, Hungarian Academy of Sciences, H-6726 Szeged, Hungary
- Correspondence: (G.J.); (P.L.)
| | - Péter Lőrincz
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary; (Z.L.); (P.B.)
- Premium Postdoctoral Research Program, Hungarian Academy of Sciences, H-1052 Budapest, Hungary
- Correspondence: (G.J.); (P.L.)
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13
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The understudied links of the retromer complex to age-related pathways. GeroScience 2021; 44:19-24. [PMID: 34370162 PMCID: PMC8811076 DOI: 10.1007/s11357-021-00430-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 07/30/2021] [Indexed: 11/03/2022] Open
Abstract
Neuronal aging is associated with numerous diseases resulting in memory impairment and functional decline. A common hallmark of these disorders is the accumulation of intracellular and extracellular protein aggregates. The retromer complex plays a central role in sorting proteins by marking them for reuse rather than degradation. Retromer dysfunction has been shown to induce protein aggregates and neurodegeneration, suggesting that it may be important for age-related neuronal decline and disease progression. Despite this, little is known about how aging influences retromer stability and the proteins with which it interacts. Detailed insights into age-dependent changes in retromer structure and function could provide valuable information towards treating and preventing many age-related neurodegenerative disorders. Here, we visit age-related pathways which interact with retromer function that ought to be further explored to determine its role in age-related neurodegeneration.
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14
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Walsh RB, Dresselhaus EC, Becalska AN, Zunitch MJ, Blanchette CR, Scalera AL, Lemos T, Lee SM, Apiki J, Wang S, Isaac B, Yeh A, Koles K, Rodal AA. Opposing functions for retromer and Rab11 in extracellular vesicle traffic at presynaptic terminals. J Cell Biol 2021; 220:212178. [PMID: 34019080 PMCID: PMC8144913 DOI: 10.1083/jcb.202012034] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 03/15/2021] [Accepted: 04/29/2021] [Indexed: 12/18/2022] Open
Abstract
Neuronal extracellular vesicles (EVs) play important roles in intercellular communication and pathogenic protein propagation in neurological disease. However, it remains unclear how cargoes are selectively packaged into neuronal EVs. Here, we show that loss of the endosomal retromer complex leads to accumulation of EV cargoes including amyloid precursor protein (APP), synaptotagmin-4 (Syt4), and neuroglian (Nrg) at Drosophila motor neuron presynaptic terminals, resulting in increased release of these cargoes in EVs. By systematically exploring known retromer-dependent trafficking mechanisms, we show that EV regulation is separable from several previously identified roles of neuronal retromer. Conversely, mutations in rab11 and rab4, regulators of endosome-plasma membrane recycling, cause reduced EV cargo levels, and rab11 suppresses cargo accumulation in retromer mutants. Thus, EV traffic reflects a balance between Rab4/Rab11 recycling and retromer-dependent removal from EV precursor compartments. Our data shed light on previous studies implicating Rab11 and retromer in competing pathways in Alzheimer's disease, and suggest that misregulated EV traffic may be an underlying defect.
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Affiliation(s)
- Rylie B Walsh
- Department of Biology, Brandeis University, Waltham, MA
| | | | | | | | | | - Amy L Scalera
- Department of Biology, Brandeis University, Waltham, MA
| | - Tania Lemos
- Department of Biology, Brandeis University, Waltham, MA
| | - So Min Lee
- Department of Biology, Brandeis University, Waltham, MA
| | - Julia Apiki
- Department of Biology, Brandeis University, Waltham, MA
| | - ShiYu Wang
- Department of Biology, Brandeis University, Waltham, MA
| | - Berith Isaac
- Department of Biology, Brandeis University, Waltham, MA
| | - Anna Yeh
- Department of Biology, Brandeis University, Waltham, MA
| | - Kate Koles
- Department of Biology, Brandeis University, Waltham, MA
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15
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Genetic analysis of the Drosophila ESCRT-III complex protein, VPS24, reveals a novel function in lysosome homeostasis. PLoS One 2021; 16:e0251184. [PMID: 33956855 PMCID: PMC8101729 DOI: 10.1371/journal.pone.0251184] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 04/21/2021] [Indexed: 12/28/2022] Open
Abstract
The ESCRT pathway is evolutionarily conserved across eukaryotes and plays key roles in a variety of membrane remodeling processes. A new Drosophila mutant recovered in our forward genetic screens for synaptic transmission mutants mapped to the vps24 gene encoding a subunit of the ESCRT-III complex. Molecular characterization indicated a loss of VPS24 function, however the mutant is viable and thus loss of VPS24 may be studied in a developed multicellular organism. The mutant exhibits deficits in locomotion and lifespan and, notably, these phenotypes are rescued by neuronal expression of wild-type VPS24. At the cellular level, neuronal and muscle cells exhibit marked expansion of a ubiquitin-positive lysosomal compartment, as well as accumulation of autophagic intermediates, and these phenotypes are rescued cell-autonomously. Moreover, VPS24 expression in glia suppressed the mutant phenotype in muscle, indicating a cell-nonautonomous function for VPS24 in protective intercellular signaling. Ultrastructural analysis of neurons and muscle indicated marked accumulation of the lysosomal compartment in the vps24 mutant. In the neuronal cell body, this included characteristic lysosomal structures associated with an expansive membrane compartment with a striking tubular network morphology. These findings further define the in vivo roles of VPS24 and the ESCRT pathway in lysosome homeostasis and their potential contributions to neurodegenerative diseases characterized by defective ESCRT or lysosome function.
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16
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Courtland JL, Bradshaw TWA, Waitt G, Soderblom EJ, Ho T, Rajab A, Vancini R, Kim IH, Soderling SH. Genetic disruption of WASHC4 drives endo-lysosomal dysfunction and cognitive-movement impairments in mice and humans. eLife 2021; 10:e61590. [PMID: 33749590 PMCID: PMC7984842 DOI: 10.7554/elife.61590] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 02/09/2021] [Indexed: 12/12/2022] Open
Abstract
Mutation of the Wiskott-Aldrich syndrome protein and SCAR homology (WASH) complex subunit, SWIP, is implicated in human intellectual disability, but the cellular etiology of this association is unknown. We identify the neuronal WASH complex proteome, revealing a network of endosomal proteins. To uncover how dysfunction of endosomal SWIP leads to disease, we generate a mouse model of the human WASHC4c.3056C>G mutation. Quantitative spatial proteomics analysis of SWIPP1019R mouse brain reveals that this mutation destabilizes the WASH complex and uncovers significant perturbations in both endosomal and lysosomal pathways. Cellular and histological analyses confirm that SWIPP1019R results in endo-lysosomal disruption and uncover indicators of neurodegeneration. We find that SWIPP1019R not only impacts cognition, but also causes significant progressive motor deficits in mice. A retrospective analysis of SWIPP1019R patients reveals similar movement deficits in humans. Combined, these findings support the model that WASH complex destabilization, resulting from SWIPP1019R, drives cognitive and motor impairments via endo-lysosomal dysfunction in the brain.
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Affiliation(s)
- Jamie L Courtland
- Department of Neurobiology, Duke University School of MedicineDurhamUnited States
| | - Tyler WA Bradshaw
- Department of Neurobiology, Duke University School of MedicineDurhamUnited States
| | - Greg Waitt
- Proteomics and Metabolomics Shared Resource, Duke University School of MedicineDurhamUnited States
| | - Erik J Soderblom
- Proteomics and Metabolomics Shared Resource, Duke University School of MedicineDurhamUnited States
- Department of Cell Biology, Duke University School of MedicineDurhamUnited States
| | - Tricia Ho
- Proteomics and Metabolomics Shared Resource, Duke University School of MedicineDurhamUnited States
| | - Anna Rajab
- Burjeel Hospital, VPS HealthcareMuscatOman
| | - Ricardo Vancini
- Department of Pathology, Duke University School of MedicineDurhamUnited States
| | - Il Hwan Kim
- Department of Cell Biology, Duke University School of MedicineDurhamUnited States
- Department of Anatomy and Neurobiology, University of Tennessee Heath Science CenterMemphisUnited States
| | - Scott H Soderling
- Department of Neurobiology, Duke University School of MedicineDurhamUnited States
- Department of Cell Biology, Duke University School of MedicineDurhamUnited States
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17
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Cui Y, Yang Z, Flores-Rodriguez N, Follett J, Ariotti N, Wall AA, Parton RG, Teasdale RD. Formation of retromer transport carriers is disrupted by the Parkinson disease-linked Vps35 D620N variant. Traffic 2021; 22:123-136. [PMID: 33347683 DOI: 10.1111/tra.12779] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/16/2020] [Accepted: 12/17/2020] [Indexed: 12/26/2022]
Abstract
Retromer core complex is an endosomal scaffold that plays a critical role in orchestrating protein trafficking within the endosomal system. Here we characterized the effect of the Parkinson's disease-linked Vps35 D620N in the endo-lysosomal system using Vps35 D620N rescue cell models. Vps35 D620N fully rescues the lysosomal and autophagy defects caused by retromer knock-out. Analogous to Vps35 knock out cells, the endosome-to-trans-Golgi network transport of cation-independent mannose 6-phosphate receptor (CI-M6PR) is impaired in Vps35 D620N rescue cells because of a reduced capacity to form endosome transport carriers. Cells expressing the Vps35 D620N variant have altered endosomal morphology, resulting in smaller, rounder structures with less tubule-like branches. At the molecular level retromer incorporating Vps35 D620N variant has a decreased binding to retromer associated proteins wiskott-aldrich syndrome protein and SCAR homologue (WASH) and SNX3 which are known to associate with retromer to form the endosome transport carriers. Hence, the partial defects on retrograde protein trafficking carriers in the presence of Vps35 D620N represents an altered cellular state able to cause Parkinson's disease.
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Affiliation(s)
- Yi Cui
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Zhe Yang
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Neftali Flores-Rodriguez
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Jordan Follett
- Institute for Molecular Biosciences and Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, Queensland, Australia
| | - Nicholas Ariotti
- Institute for Molecular Biosciences and Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, Queensland, Australia
| | - Adam A Wall
- Institute for Molecular Biosciences and Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, Queensland, Australia
| | - Robert G Parton
- Institute for Molecular Biosciences and Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, Queensland, Australia
| | - Rohan D Teasdale
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
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18
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Neuman SD, Terry EL, Selegue JE, Cavanagh AT, Bashirullah A. Mistargeting of secretory cargo in retromer-deficient cells. Dis Model Mech 2021; 14:dmm.046417. [PMID: 33380435 PMCID: PMC7847263 DOI: 10.1242/dmm.046417] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 12/08/2020] [Indexed: 12/11/2022] Open
Abstract
Intracellular trafficking is a basic and essential cellular function required for delivery of proteins to the appropriate subcellular destination; this process is especially demanding in professional secretory cells, which synthesize and secrete massive quantities of cargo proteins via regulated exocytosis. The Drosophila larval salivary glands are composed of professional secretory cells that synthesize and secrete mucin proteins at the onset of metamorphosis. Using the larval salivary glands as a model system, we have identified a role for the highly conserved retromer complex in trafficking of secretory granule membrane proteins. We demonstrate that retromer-dependent trafficking via endosomal tubules is induced at the onset of secretory granule biogenesis, and that recycling via endosomal tubules is required for delivery of essential secretory granule membrane proteins to nascent granules. Without retromer function, nascent granules do not contain the proper membrane proteins; as a result, cargo from these defective granules is mistargeted to Rab7-positive endosomes, where it progressively accumulates to generate dramatically enlarged endosomes. Retromer complex dysfunction is strongly associated with neurodegenerative diseases, including Alzheimer's disease, characterized by accumulation of amyloid β (Aβ). We show that ectopically expressed amyloid precursor protein (APP) undergoes regulated exocytosis in salivary glands and accumulates within enlarged endosomes in retromer-deficient cells. These results highlight recycling of secretory granule membrane proteins as a critical step during secretory granule maturation and provide new insights into our understanding of retromer complex function in secretory cells. These findings also suggest that missorting of secretory cargo, including APP, may contribute to the progressive nature of neurodegenerative disease.
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Affiliation(s)
- Sarah D Neuman
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, WI 53705-2222, USA
| | - Erica L Terry
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, WI 53705-2222, USA
| | - Jane E Selegue
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, WI 53705-2222, USA
| | - Amy T Cavanagh
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, WI 53705-2222, USA
| | - Arash Bashirullah
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, WI 53705-2222, USA
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19
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Vos DY, van de Sluis B. Function of the endolysosomal network in cholesterol homeostasis and metabolic-associated fatty liver disease (MAFLD). Mol Metab 2021; 50:101146. [PMID: 33348067 PMCID: PMC8324686 DOI: 10.1016/j.molmet.2020.101146] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 11/26/2020] [Accepted: 12/14/2020] [Indexed: 02/08/2023] Open
Abstract
Background Metabolic-associated fatty liver disease (MAFLD), also known as non-alcoholic fatty liver disease, has become the leading cause of chronic liver disease worldwide. In addition to hepatic accumulation of triglycerides, dysregulated cholesterol metabolism is an important contributor to the pathogenesis of MAFLD. Maintenance of cholesterol homeostasis is highly dependent on cellular cholesterol uptake and, subsequently, cholesterol transport to other membrane compartments, such as the endoplasmic reticulum (ER). Scope of review The endolysosomal network is key for regulating cellular homeostasis and adaptation, and emerging evidence has shown that the endolysosomal network is crucial to maintain metabolic homeostasis. In this review, we will summarize our current understanding of the role of the endolysosomal network in cholesterol homeostasis and its implications in MAFLD pathogenesis. Major conclusions Although multiple endolysosomal proteins have been identified in the regulation of cholesterol uptake, intracellular transport, and degradation, their physiological role is incompletely understood. Further research should elucidate their role in controlling metabolic homeostasis and development of fatty liver disease. The intracellular cholesterol transport is tightly regulated by the endocytic and lysosomal network. Dysfunction of the endolysosomal network affects hepatic lipid homeostasis. The endosomal sorting of lipoprotein receptors is precisely regulated and is not a bulk process.
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Affiliation(s)
- Dyonne Y Vos
- Department of Pediatrics, section Molecular Genetics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Bart van de Sluis
- Department of Pediatrics, section Molecular Genetics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
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20
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Sargent D, Moore DJ. Mechanisms of VPS35-Mediated Neurodegeneration in Parkinson's Disease. INTERNATIONAL REVIEW OF MOVEMENT DISORDERS 2021; 2:221-244. [PMID: 35497708 DOI: 10.1016/bs.irmvd.2021.08.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Parkinson's disease is a sporadic and common neurodegenerative movement disorder resulting from the complex interplay between genetic risk, aging and environmental exposure. Familial forms of PD account for ~10% of cases and are known to result from the inheritance of mutations in at least 15 genes. Mutations in the vacuolar protein sorting 35 ortholog (VPS35) gene cause late-onset, autosomal dominant familial PD. VPS35 is a key suunit of the pentameric retromer complex that plays a role in the retrograde sorting and recycling of transmembrane cargo proteins from endosomes to the plasma membrane and trans-Golgi network. A single heterozygous Asp620Asn (D620N) mutation in VPS35 has been identified in multiple families that segregates with PD, and a number of experimental cellular and animal models have been developed to understand its pathogenic effects. At the molecular level, the D620N mutation has been shown to impair the interaction of VPS35 with the WASH complex, that plays an accessory function in retromer-dependent sorting. In addition, the D620N mutation has been linked to the abnormal sorting of retromer cargo, including CI-M6PR, AMPA receptor subunits, MUL1, LAMP2a and ATG9A, as well as to LRRK2 hyperactivation. At the cellular level, data support an impact of D620N VPS35 on mitochondrial function, the autophagy-lysosomal pathway, Wnt signaling and neurotransmission via altered endosomal sorting. The relevance of abnormal retromer sorting and cellular pathways to PD-related neurodegenerative phenotypes induced by D620N VPS35 in rodent models is not yet clear. There is also uncertainty regarding the mechanism-of-action of the D620N mutation and whether it manifests pathogenic effects in animal models and PD through a gain-of-function and/or a partial dominant-negative mechanism. Here, we discuss the emerging molecular and cellular mechanisms underlying PD induced by familial VPS35 mutations, going from structure to cellular function to neuropathology. We further discuss studies linking reduced retromer function to other neurodegenerative diseases and potential therapeutic strategies to normalize retromer function to mitigate disease.
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Affiliation(s)
- Dorian Sargent
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI 49503, USA
| | - Darren J Moore
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI 49503, USA
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21
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Carosi JM, Hein LK, van den Hurk M, Adams R, Milky B, Singh S, Bardy C, Denton D, Kumar S, Sargeant TJ. Retromer regulates the lysosomal clearance of MAPT/tau. Autophagy 2020; 17:2217-2237. [PMID: 32960680 DOI: 10.1080/15548627.2020.1821545] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The macroautophagy/autophagy-lysosome axis enables the clearance and degradation of cytoplasmic components including protein aggregates, damaged organelles and invading pathogens. Protein aggregation and lysosomal system dysfunction in the brain are common features of several late-onset neurological disorders including Alzheimer disease. Spatial overlap between depletion of the endosomal-sorting complex retromer and MAPT/tau aggregation in the brain have been previously reported. However, whether retromer dysfunction plays a direct role in mediating MAPT aggregation remains unclear. Here, we demonstrate that the autophagy-lysosome axis is the primary mode for the clearance of aggregated species of MAPT using both chemical and genetic approaches in cell models of amyloid MAPT aggregation. We show that depletion of the central retromer component VPS35 causes a block in the resolution of autophagy. We establish that this defect underlies marked accumulation of cytoplasmic MAPT aggregates upon VPS35 depletion, and that VPS35 overexpression has the opposite effect. This work illustrates how retromer complex integrity regulates the autophagy-lysosome axis to suppress MAPT aggregation and spread.
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Affiliation(s)
- Julian M Carosi
- Lysosomal Health in Ageing, Hopwood Centre for Neurobiology, South Australian Health & Medical Research Institute, Adelaide, SA, Australia.,Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia.,School of Pharmacy & Medical Science, Division of Health Sciences, University of South Australia, Adelaide, SA, Australia
| | - Leanne K Hein
- Lysosomal Health in Ageing, Hopwood Centre for Neurobiology, South Australian Health & Medical Research Institute, Adelaide, SA, Australia
| | - Mark van den Hurk
- Laboratory for Human Neurophysiology and Genetics, Hopwood Centre for Neurobiology, South Australian Health & Medical Research Institute, Adelaide, SA, Australia
| | - Robert Adams
- Laboratory for Human Neurophysiology and Genetics, Hopwood Centre for Neurobiology, South Australian Health & Medical Research Institute, Adelaide, SA, Australia.,College of Medicine and Public Health, Flinders University, Bedford Park, SA, Australia
| | - Bridget Milky
- Laboratory for Human Neurophysiology and Genetics, Hopwood Centre for Neurobiology, South Australian Health & Medical Research Institute, Adelaide, SA, Australia.,College of Medicine and Public Health, Flinders University, Bedford Park, SA, Australia
| | - Sanjna Singh
- Lysosomal Health in Ageing, Hopwood Centre for Neurobiology, South Australian Health & Medical Research Institute, Adelaide, SA, Australia.,Adelaide Medical School, Faculty of Health and Medical Science, University of Adelaide, Adelaide, SA, Australia
| | - Cedric Bardy
- Laboratory for Human Neurophysiology and Genetics, Hopwood Centre for Neurobiology, South Australian Health & Medical Research Institute, Adelaide, SA, Australia.,College of Medicine and Public Health, Flinders University, Bedford Park, SA, Australia
| | - Donna Denton
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia
| | - Sharad Kumar
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia
| | - Timothy J Sargeant
- Lysosomal Health in Ageing, Hopwood Centre for Neurobiology, South Australian Health & Medical Research Institute, Adelaide, SA, Australia
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22
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Endosomal Trafficking in Alzheimer's Disease, Parkinson's Disease, and Neuronal Ceroid Lipofuscinosis. Mol Cell Biol 2020; 40:MCB.00262-20. [PMID: 32690545 DOI: 10.1128/mcb.00262-20] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Neuronal ceroid lipofuscinosis (NCL) is one of the most prevalent neurodegenerative disorders of early life, Parkinson's disease (PD) is the most common neurodegenerative disorder of midlife, while Alzheimer's disease (AD) is the most common neurodegenerative disorder of late life. While they are phenotypically distinct, recent studies suggest that they share a biological pathway, retromer-dependent endosomal trafficking. A retromer is a multimodular protein assembly critical for sorting and trafficking cargo out of the endosome. As a lysosomal storage disease, all 13 of NCL's causative genes affect endolysosomal function, and at least four have been directly linked to retromer. PD has several known causative genes, with one directly linked to retromer and others causing endolysosomal dysfunction. AD has over 25 causative genes/risk factors, with several of them linked to retromer or endosomal trafficking dysfunction. In this article, we summarize the emerging evidence on the association of genes causing NCL with retromer function and endosomal trafficking, review the recent evidence linking NCL genes to AD, and discuss how NCL, AD, and PD converge on a shared molecular pathway. We also discuss this pathway's role in microglia and neurons, cell populations which are critical to proper brain homeostasis and whose dysfunction plays a key role in neurodegeneration.
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23
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Park H, Kang JH, Lee S. Autophagy in Neurodegenerative Diseases: A Hunter for Aggregates. Int J Mol Sci 2020; 21:ijms21093369. [PMID: 32397599 PMCID: PMC7247013 DOI: 10.3390/ijms21093369] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/07/2020] [Accepted: 05/07/2020] [Indexed: 12/14/2022] Open
Abstract
Cells have developed elaborate quality-control mechanisms for proteins and organelles to maintain cellular homeostasis. Such quality-control mechanisms are maintained by conformational folding via molecular chaperones and by degradation through the ubiquitin-proteasome or autophagy-lysosome system. Accumulating evidence suggests that impaired autophagy contributes to the accumulation of intracellular inclusion bodies consisting of misfolded proteins, which is a hallmark of most neurodegenerative diseases. In addition, genetic mutations in core autophagy-related genes have been reported to be linked to neurodegenerative diseases, such as Alzheimer’s disease, Parkinson’s disease, and Huntington’s disease. Conversely, the pathogenic proteins, such as amyloid β and α-synuclein, are detrimental to the autophagy pathway. Here, we review the recent advances in understanding the relationship between autophagic defects and the pathogenesis of neurodegenerative diseases and suggest autophagy induction as a promising strategy for the treatment of these conditions.
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Affiliation(s)
- Hyungsun Park
- Department of Anatomy, College of Medicine, Inha University, Incheon 22212, Korea;
- Hypoxia-related Disease Research Center, College of Medicine, Inha University, Incheon 22212, Korea;
| | - Ju-Hee Kang
- Hypoxia-related Disease Research Center, College of Medicine, Inha University, Incheon 22212, Korea;
- Department of Pharmacology, College of Medicine, Inha University, Incheon 22212, Korea
| | - Seongju Lee
- Department of Anatomy, College of Medicine, Inha University, Incheon 22212, Korea;
- Hypoxia-related Disease Research Center, College of Medicine, Inha University, Incheon 22212, Korea;
- Correspondence: ; Tel.: +82-32-860-9891
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24
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Ye H, Ojelade SA, Li-Kroeger D, Zuo Z, Wang L, Li Y, Gu JYJ, Tepass U, Rodal AA, Bellen HJ, Shulman JM. Retromer subunit, VPS29, regulates synaptic transmission and is required for endolysosomal function in the aging brain. eLife 2020; 9:e51977. [PMID: 32286230 PMCID: PMC7182434 DOI: 10.7554/elife.51977] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 04/11/2020] [Indexed: 12/13/2022] Open
Abstract
Retromer, including Vps35, Vps26, and Vps29, is a protein complex responsible for recycling proteins within the endolysosomal pathway. Although implicated in both Parkinson's and Alzheimer's disease, our understanding of retromer function in the adult brain remains limited, in part because Vps35 and Vps26 are essential for development. In Drosophila, we find that Vps29 is dispensable for embryogenesis but required for retromer function in aging adults, including for synaptic transmission, survival, and locomotion. Unexpectedly, in Vps29 mutants, Vps35 and Vps26 proteins are normally expressed and associated, but retromer is mislocalized from neuropil to soma with the Rab7 GTPase. Further, Vps29 phenotypes are suppressed by reducing Rab7 or overexpressing the GTPase activating protein, TBC1D5. With aging, retromer insufficiency triggers progressive endolysosomal dysfunction, with ultrastructural evidence of impaired substrate clearance and lysosomal stress. Our results reveal the role of Vps29 in retromer localization and function, highlighting requirements for brain homeostasis in aging.
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Affiliation(s)
- Hui Ye
- Department of Molecular and Human Genetics, Baylor College of MedicineHoustonUnited States
- Department of Neurology, Baylor College of MedicineHoustonUnited States
| | | | - David Li-Kroeger
- Department of Molecular and Human Genetics, Baylor College of MedicineHoustonUnited States
| | - Zhongyuan Zuo
- Department of Molecular and Human Genetics, Baylor College of MedicineHoustonUnited States
| | - Liping Wang
- Program in Developmental Biology, Baylor College of MedicineHoustonUnited States
| | - Yarong Li
- Department of Neurology, Baylor College of MedicineHoustonUnited States
| | - Jessica YJ Gu
- Department of Cell and Systems Biology, University of TorontoOntarioCanada
| | - Ulrich Tepass
- Department of Cell and Systems Biology, University of TorontoOntarioCanada
| | | | - Hugo J Bellen
- Department of Molecular and Human Genetics, Baylor College of MedicineHoustonUnited States
- Program in Developmental Biology, Baylor College of MedicineHoustonUnited States
- Department of Neuroscience, Baylor College of MedicineHoustonUnited States
- Howard Hughes Medical InstituteHoustonUnited States
- Jan and Dan Duncan Neurological Research Institute, Texas Children’s HospitalHoustonUnited States
| | - Joshua M Shulman
- Department of Molecular and Human Genetics, Baylor College of MedicineHoustonUnited States
- Department of Neurology, Baylor College of MedicineHoustonUnited States
- Program in Developmental Biology, Baylor College of MedicineHoustonUnited States
- Department of Neuroscience, Baylor College of MedicineHoustonUnited States
- Jan and Dan Duncan Neurological Research Institute, Texas Children’s HospitalHoustonUnited States
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25
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Tang FL, Zhao L, Zhao Y, Sun D, Zhu XJ, Mei L, Xiong WC. Coupling of terminal differentiation deficit with neurodegenerative pathology in Vps35-deficient pyramidal neurons. Cell Death Differ 2020; 27:2099-2116. [PMID: 31907392 PMCID: PMC7308361 DOI: 10.1038/s41418-019-0487-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 12/13/2019] [Accepted: 12/17/2019] [Indexed: 12/11/2022] Open
Abstract
Vps35 (vacuolar protein sorting 35) is a key component of retromer that regulates transmembrane protein trafficking. Dysfunctional Vps35 is a risk factor for neurodegenerative diseases, including Parkinson’s and Alzheimer’s diseases. Vps35 is highly expressed in developing pyramidal neurons, and its physiological role in developing neurons remains to be explored. Here, we provide evidence that Vps35 in embryonic neurons is necessary for axonal and dendritic terminal differentiation. Loss of Vps35 in embryonic neurons results in not only terminal differentiation deficits, but also neurodegenerative pathology, such as cortical brain atrophy and reactive glial responses. The atrophy of neocortex appears to be in association with increases in neuronal death, autophagosome proteins (LC3-II and P62), and neurodegeneration associated proteins (TDP43 and ubiquitin-conjugated proteins). Further studies reveal an increase of retromer cargo protein, sortilin1 (Sort1), in lysosomes of Vps35-KO neurons, and lysosomal dysfunction. Suppression of Sort1 diminishes Vps35-KO-induced dendritic defects. Expression of lysosomal Sort1 recapitulates Vps35-KO-induced phenotypes. Together, these results demonstrate embryonic neuronal Vps35’s function in terminal axonal and dendritic differentiation, reveal an association of terminal differentiation deficit with neurodegenerative pathology, and uncover an important lysosomal contribution to both events.
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Affiliation(s)
- Fu-Lei Tang
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, 30912, Georgia
| | - Lu Zhao
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, 30912, Georgia.,Department of Neurosciences, Case Western Reserve University, School of Medicine, Cleveland, OH, 44106, USA.,Key Laboratory of Molecular Epigenetics of Ministry of Education, Institute of Cytology and Genetics, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Yang Zhao
- Department of Neurosciences, Case Western Reserve University, School of Medicine, Cleveland, OH, 44106, USA.,Key Laboratory of Molecular Epigenetics of Ministry of Education, Institute of Cytology and Genetics, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Dong Sun
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, 30912, Georgia.,Department of Neurosciences, Case Western Reserve University, School of Medicine, Cleveland, OH, 44106, USA
| | - Xiao-Juan Zhu
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Institute of Cytology and Genetics, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Lin Mei
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, 30912, Georgia.,Department of Neurosciences, Case Western Reserve University, School of Medicine, Cleveland, OH, 44106, USA
| | - Wen-Cheng Xiong
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, 30912, Georgia. .,Department of Neurosciences, Case Western Reserve University, School of Medicine, Cleveland, OH, 44106, USA.
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26
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Molecular mechanisms of selective autophagy in Drosophila. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2020; 354:63-105. [DOI: 10.1016/bs.ircmb.2019.08.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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27
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Rodriguez-Furlan C, Domozych D, Qian W, Enquist PA, Li X, Zhang C, Schenk R, Winbigler HS, Jackson W, Raikhel NV, Hicks GR. Interaction between VPS35 and RABG3f is necessary as a checkpoint to control fusion of late compartments with the vacuole. Proc Natl Acad Sci U S A 2019; 116:21291-21301. [PMID: 31570580 PMCID: PMC6800349 DOI: 10.1073/pnas.1905321116] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Vacuoles are essential organelles in plants, playing crucial roles, such as cellular material degradation, ion and metabolite storage, and turgor maintenance. Vacuoles receive material via the endocytic, secretory, and autophagic pathways. Membrane fusion is the last step during which prevacuolar compartments (PVCs) and autophagosomes fuse with the vacuole membrane (tonoplast) to deliver cargoes. Protein components of the canonical intracellular fusion machinery that are conserved across organisms, including Arabidopsis thaliana, include complexes, such as soluble N-ethylmaleimide-sensitive factor attachment protein receptors (SNAREs), that catalyze membrane fusion, and homotypic fusion and vacuole protein sorting (HOPS), that serve as adaptors which tether cargo vesicles to target membranes for fusion under the regulation of RAB-GTPases. The mechanisms regulating the recruitment and assembly of tethering complexes are not well-understood, especially the role of RABs in this dynamic regulation. Here, we report the identification of the small synthetic molecule Endosidin17 (ES17), which interferes with synthetic, endocytic, and autophagic traffic by impairing the fusion of late endosome compartments with the tonoplast. Multiple independent target identification techniques revealed that ES17 targets the VPS35 subunit of the retromer tethering complex, preventing its normal interaction with the Arabidopsis RAB7 homolog RABG3f. ES17 interference with VPS35-RABG3f interaction prevents the retromer complex to endosome anchoring, resulting in retention of RABG3f. Using multiple approaches, we show that VPS35-RABG3f-GTP interaction is necessary to trigger downstream events like HOPS complex assembly and fusion of late compartments with the tonoplast. Overall, our results support a role for the interaction of RABG3f-VPS35 as a checkpoint in the control of traffic toward the vacuole.
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Affiliation(s)
- Cecilia Rodriguez-Furlan
- Department of Botany and Plant Sciences, University of California, Riverside, CA 92506
- Institute of Integrative Genome Biology, University of California, Riverside, CA 92506
| | - David Domozych
- Biology Department, Skidmore College, Saratoga Springs, NY 12866
| | - Weixing Qian
- Department of Chemistry, Umea University, SE-901 87 Umea, Sweden
- Department of Chemistry, Chemical Biology Consortium Sweden, SE-901 87 Umea, Sweden
| | - Per-Anders Enquist
- Department of Chemistry, Umea University, SE-901 87 Umea, Sweden
- Department of Chemistry, Chemical Biology Consortium Sweden, SE-901 87 Umea, Sweden
| | - Xiaohui Li
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47906
- Center for Plant Biology, Purdue University, West Lafayette, IN 47906
| | - Chunhua Zhang
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47906
- Center for Plant Biology, Purdue University, West Lafayette, IN 47906
| | - Rolf Schenk
- Department of Botany and Plant Sciences, University of California, Riverside, CA 92506
- Institute of Integrative Genome Biology, University of California, Riverside, CA 92506
| | - Holly Saulsbery Winbigler
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD 20201
| | - William Jackson
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD 20201
| | - Natasha V Raikhel
- Department of Botany and Plant Sciences, University of California, Riverside, CA 92506
- Institute of Integrative Genome Biology, University of California, Riverside, CA 92506
| | - Glenn R Hicks
- Department of Botany and Plant Sciences, University of California, Riverside, CA 92506;
- Institute of Integrative Genome Biology, University of California, Riverside, CA 92506
- Uppsala BioCenter, Swedish University of Agricultural Sciences, SE-75007 Uppsala, Sweden
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28
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Bäumers M, Klose S, Brüser C, Haag C, Hänsch S, Pannen H, Weidtkamp-Peters S, Feldbrügge M, Klein T. The auxiliary ESCRT complexes provide robustness to cold in poikilothermic organisms. Biol Open 2019; 8:bio.043422. [PMID: 31412999 PMCID: PMC6777356 DOI: 10.1242/bio.043422] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The ESCRT pathway, comprising the in sequence acting ESCRT-0, -I, -II, -III and Vps4 complexes, conducts the abscission of membranes away from the cytosol. Whereas the components of the central ESCRT-III core complex have been thoroughly investigated, the function of the components of the associated two auxiliary ESCRT sub-complexes are not well-understood in metazoans, especially at the organismal level. We here present the developmental analysis of the Drosophila orthologs of the auxiliary ESCRTs Chmp5 and Ist1, DChmp5 and DIst1, which belong to the two auxiliary sub-complexes. While each single null mutant displayed mild defects in development, the Dist1 Dchmp5 double mutant displayed a severe defect, indicating that the two genes act synergistically, but in separate pathways. Moreover, the presented results indicate that the auxiliary ESCRTs provide robustness against cold during development of diverse poikilothermic organisms, probably by preventing the accumulation of the ESCRT-III core component Shrub on the endosomal membrane. Summary: The analysis of Chmp5 and Ist1, which belong to the two ESCRT auxiliary sub-complexes in Drosophila, suggests that these ESCRT proteins provide robustness against cold in diverse poikilothermic organisms.
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Affiliation(s)
- Miriam Bäumers
- Institute of Genetics, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Sven Klose
- Institute of Genetics, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Christian Brüser
- Institute of Genetics, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Carl Haag
- Institute of Microbiology, Cluster of Excellence on Plant Sciences, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Sebastian Hänsch
- Center of Advanced Imaging (CAi), Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Hendrik Pannen
- Institute of Genetics, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Stefanie Weidtkamp-Peters
- Center of Advanced Imaging (CAi), Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Michael Feldbrügge
- Institute of Microbiology, Cluster of Excellence on Plant Sciences, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Thomas Klein
- Institute of Genetics, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
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29
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Lakatos Z, Lőrincz P, Szabó Z, Benkő P, Kenéz LA, Csizmadia T, Juhász G. Sec20 is Required for Autophagic and Endocytic Degradation Independent of Golgi-ER Retrograde Transport. Cells 2019; 8:cells8080768. [PMID: 31344970 PMCID: PMC6721519 DOI: 10.3390/cells8080768] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 07/18/2019] [Accepted: 07/22/2019] [Indexed: 01/07/2023] Open
Abstract
Endocytosis and autophagy are evolutionarily conserved degradative processes in all eukaryotes. Both pathways converge to the lysosome where cargo is degraded. Improper lysosomal degradation is observed in many human pathologies, so its regulatory mechanisms are important to understand. Sec20/BNIP1 (BCL2/adenovirus E1B 19 kDa protein-interacting protein 1) is a BH3 (Bcl-2 homology 3) domain-containing SNARE (soluble N-ethylmaleimide-sensitive factor-attachment protein receptors) protein that has been suggested to promote Golgi-ER retrograde transport, mitochondrial fission, apoptosis and mitophagy in yeast and vertebrates. Here, we show that loss of Sec20 in Drosophila fat cells causes the accumulation of autophagic vesicles and prevents proper lysosomal acidification and degradation during bulk, starvation-induced autophagy. Furthermore, Sec20 knockdown leads to the enlargement of late endosomes and accumulation of defective endolysosomes in larval Drosophila nephrocytes. Importantly, the loss of Syx18 (Syntaxin 18), one of the known partners of Sec20, led to similar changes in nephrocytes and fat cells. Interestingly. Sec20 appears to function independent of its role in Golgi-ER retrograde transport in regulating lysosomal degradation, as the loss of its other partner SNAREs Use1 (Unconventional SNARE In The ER 1) and Sec22 or tethering factor Zw10 (Zeste white 10), which function together in the Golgi-ER pathway, does not cause defects in autophagy or endocytosis. Thus, our data identify a potential new transport route specific to lysosome biogenesis and function.
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Affiliation(s)
- Zsolt Lakatos
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary
| | - Péter Lőrincz
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary
- Premium Postdoctoral Research Program, Hungarian Academy of Sciences, H-1117 Budapest, Hungary
| | - Zoltán Szabó
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary
| | - Péter Benkő
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary
| | - Lili Anna Kenéz
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary
| | - Tamás Csizmadia
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary
| | - Gábor Juhász
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary.
- Institute of Genetics, Biological Research Centre, Hungarian Academy of Sciences, H-6726 Szeged, Hungary.
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30
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Arias-Fuenzalida J, Jarazo J, Walter J, Gomez-Giro G, Forster JI, Krueger R, Antony PMA, Schwamborn JC. Automated high-throughput high-content autophagy and mitophagy analysis platform. Sci Rep 2019; 9:9455. [PMID: 31263238 PMCID: PMC6603000 DOI: 10.1038/s41598-019-45917-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 06/19/2019] [Indexed: 12/19/2022] Open
Abstract
Autophagic processes play a central role in cellular homeostasis. In pathological conditions, the flow of autophagy can be affected at multiple and distinct steps of the pathway. Current analyses tools do not deliver the required detail for dissecting pathway intermediates. The development of new tools to analyze autophagic processes qualitatively and quantitatively in a more straightforward manner is required. Defining all autophagy pathway intermediates in a high-throughput manner is technologically challenging and has not been addressed yet. Here, we overcome those requirements and limitations by the developed of stable autophagy and mitophagy reporter-iPSC and the establishment of a novel high-throughput phenotyping platform utilizing automated high-content image analysis to assess autophagy and mitophagy pathway intermediates.
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Affiliation(s)
- Jonathan Arias-Fuenzalida
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 7 avenue des Hauts-Fourneaux, Esch-sur-Alzette, Luxembourg.,Laboratory of Developmental and Cellular Biology, Esch-sur-Alzette, Luxembourg.,Graduate School of Biostudies, Kyoto University, Kyoto, 606-8501, Japan
| | - Javier Jarazo
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 7 avenue des Hauts-Fourneaux, Esch-sur-Alzette, Luxembourg.,Laboratory of Developmental and Cellular Biology, Esch-sur-Alzette, Luxembourg
| | - Jonas Walter
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 7 avenue des Hauts-Fourneaux, Esch-sur-Alzette, Luxembourg.,Laboratory of Developmental and Cellular Biology, Esch-sur-Alzette, Luxembourg
| | - Gemma Gomez-Giro
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 7 avenue des Hauts-Fourneaux, Esch-sur-Alzette, Luxembourg.,Laboratory of Developmental and Cellular Biology, Esch-sur-Alzette, Luxembourg.,Max Planck Institute for Molecular Biomedicine, Laboratory of Cell and Developmental Biology, Roentgenstrasse 20, Muenster, Germany
| | - Julia I Forster
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 7 avenue des Hauts-Fourneaux, Esch-sur-Alzette, Luxembourg.,Laboratory of Clinical & Experimental Neuroscience, Esch-sur-Alzette, Luxembourg
| | - Rejko Krueger
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 7 avenue des Hauts-Fourneaux, Esch-sur-Alzette, Luxembourg.,Laboratory of Clinical & Experimental Neuroscience, Esch-sur-Alzette, Luxembourg
| | - Paul M A Antony
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 7 avenue des Hauts-Fourneaux, Esch-sur-Alzette, Luxembourg. .,Laboratory of Clinical & Experimental Neuroscience, Esch-sur-Alzette, Luxembourg.
| | - Jens C Schwamborn
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 7 avenue des Hauts-Fourneaux, Esch-sur-Alzette, Luxembourg. .,Laboratory of Developmental and Cellular Biology, Esch-sur-Alzette, Luxembourg.
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31
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Cui Y, Carosi JM, Yang Z, Ariotti N, Kerr MC, Parton RG, Sargeant TJ, Teasdale RD. Retromer has a selective function in cargo sorting via endosome transport carriers. J Cell Biol 2018; 218:615-631. [PMID: 30559172 PMCID: PMC6363445 DOI: 10.1083/jcb.201806153] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 10/22/2018] [Accepted: 11/19/2018] [Indexed: 12/11/2022] Open
Abstract
The molecular actions of retromer in the endolysosomal system remain unclear and controversial. Cui et al. demonstrate the essential role of retromer in the selective incorporation of cargo into a specific type of endosome transport carrier and the maintenance of lysosomal function. Retromer is a peripheral membrane protein complex that coordinates multiple vesicular trafficking events within the endolysosomal system. Here, we demonstrate that retromer is required for the maintenance of normal lysosomal morphology and function. The knockout of retromer subunit Vps35 causes an ultrastructural alteration in lysosomal structure and aberrant lysosome function, leading to impaired autophagy. At the whole-cell level, knockout of retromer Vps35 subunit reduces lysosomal proteolytic capacity as a consequence of the improper processing of lysosomal hydrolases, which is dependent on the trafficking of the cation-independent mannose 6-phosphate receptor (CI-M6PR). Incorporation of CI-M6PR into endosome transport carriers via a retromer-dependent process is restricted to those tethered by GCC88 but not golgin-97 or golgin-245. Finally, we show that this retromer-dependent retrograde cargo trafficking pathway requires SNX3, but not other retromer-associated cargo binding proteins, such as SNX27 or SNX-BAR proteins. Therefore, retromer does contribute to the retrograde trafficking of CI-M6PR required for maturation of lysosomal hydrolases and lysosomal function.
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Affiliation(s)
- Yi Cui
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Julian M Carosi
- Hopwood Centre for Neurobiology, Nutrition and Metabolism Theme, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia.,Centre for Cancer Biology, University of South Australia, Adelaide, South Australia, Australia
| | - Zhe Yang
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Nicholas Ariotti
- Institute for Molecular Biosciences and Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, Queensland, Australia
| | - Markus C Kerr
- Institute for Molecular Biosciences and Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, Queensland, Australia
| | - Robert G Parton
- Institute for Molecular Biosciences and Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, Queensland, Australia
| | - Timothy J Sargeant
- Hopwood Centre for Neurobiology, Nutrition and Metabolism Theme, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia.,School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - Rohan D Teasdale
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
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32
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Ayala CI, Kim J, Neufeld TP. Rab6 promotes insulin receptor and cathepsin trafficking to regulate autophagy induction and activity in Drosophila. J Cell Sci 2018; 131:jcs.216127. [PMID: 30111579 DOI: 10.1242/jcs.216127] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 08/02/2018] [Indexed: 01/07/2023] Open
Abstract
The self-degradative process of autophagy is important for energy homeostasis and cytoplasmic renewal. This lysosome-mediated pathway is negatively regulated by the target of rapamycin kinase (TOR) under basal conditions, and requires the vesicle trafficking machinery regulated by Rab GTPases. However, the interactions between autophagy, TOR and Rab proteins remain incompletely understood in vivo Here, we identify Rab6 as a critical regulator of the balance between TOR signaling and autolysosome function. Loss of Rab6 causes an accumulation of enlarged autophagic vesicles resulting in part from a failure to deliver lysosomal hydrolases, rendering autolysosomes with a reduced degradative capacity and impaired turnover. Additionally, Rab6-deficient cells are reduced in size and display defective insulin-TOR signaling as a result of mis-sorting and internalization of the insulin receptor. Our findings suggest that Rab6 acts to maintain the reciprocal regulation between autophagy and TOR activity during distinct nutrient states, thereby balancing autophagosome production and turnover to avoid autophagic stress.
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Affiliation(s)
- Carlos I Ayala
- Department of Genetics, Cell Biology and Development, 6-160 Jackson Hall, 321 Church St. SE, University of Minnesota, Minneapolis, MN 55455, USA
| | - Jung Kim
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA 94720, USA
| | - Thomas P Neufeld
- Department of Genetics, Cell Biology and Development, 6-160 Jackson Hall, 321 Church St. SE, University of Minnesota, Minneapolis, MN 55455, USA
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Elwell C, Engel J. Emerging Role of Retromer in Modulating Pathogen Growth. Trends Microbiol 2018; 26:769-780. [PMID: 29703496 DOI: 10.1016/j.tim.2018.04.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 03/21/2018] [Accepted: 04/02/2018] [Indexed: 12/20/2022]
Abstract
Intracellular pathogens have developed elegant mechanisms to modulate host endosomal trafficking. The highly conserved retromer pathway has emerged as an important target of viruses and intravacuolar bacteria. Some pathogens require retromer function to survive. For others, retromer activity restricts intracellular growth; these pathogens must disrupt retromer function to survive. In this review, we discuss recent paradigm changes to the current model for retromer assembly and cargo selection. We highlight how the study of pathogen effectors has contributed to these fundamental insights, with a special focus on the biology and structure of two recently described bacterial effectors, Chlamydia trachomatis IncE and Legionella pneumophila RidL. These two pathogens employ distinct strategies to target retromer components and overcome restriction of intracellular growth imposed by retromer.
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Affiliation(s)
- Cherilyn Elwell
- Department of Medicine, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Joanne Engel
- Department of Medicine, University of California, San Francisco, San Francisco, CA 94143, USA; Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143, USA.
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Kalinowska K, Isono E. All roads lead to the vacuole-autophagic transport as part of the endomembrane trafficking network in plants. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:1313-1324. [PMID: 29165603 DOI: 10.1093/jxb/erx395] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 10/14/2017] [Indexed: 05/10/2023]
Abstract
Plants regulate their development and response to the changing environment by sensing and interpreting environmental signals. Intracellular trafficking pathways including endocytic-, vacuolar-, and autophagic trafficking are important for the various aspects of responses in plants. Studies in the last decade have shown that the autophagic transport pathway uses common key components of endomembrane trafficking as well as specific regulators. A number of factors previously described for their function in endosomal trafficking have been discovered to be involved in the regulation of autophagy in plants. These include conserved endocytic machineries, such as the endosomal sorting complex required for transport (ESCRT), subunits of the HOPS and exocyst complexes, SNAREs, and RAB GTPases as well as plant-specific proteins. Defects in these factors have been shown to cause impairment of autophagosome formation, transport, fusion, and degradation, suggesting crosstalk between autophagy and other intracellular trafficking processes. In this review, we focus mainly on possible functions of endosomal trafficking components in autophagy.
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Mechanism of inhibition of retromer transport by the bacterial effector RidL. Proc Natl Acad Sci U S A 2018; 115:E1446-E1454. [PMID: 29386389 DOI: 10.1073/pnas.1717383115] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Retrograde vesicle trafficking pathways are responsible for returning membrane-associated components from endosomes to the Golgi apparatus and the endoplasmic reticulum (ER), and they are critical for maintaining organelle identity, lipid homeostasis, and many other cellular functions. The retrograde transport pathway has emerged as an important target for intravacuolar bacterial pathogens. The opportunistic pathogen Legionella pneumophila exploits both the secretory and recycling branches of the vesicle transport pathway for intracellular bacterial proliferation. Its Dot/Icm effector RidL inhibits the activity of the retromer by directly engaging retromer components. However, the mechanism underlying such inhibition remains unknown. Here we present the crystal structure of RidL in complex with VPS29, a subunit of the retromer. Our results demonstrate that RidL binds to a highly conserved hydrophobic pocket of VPS29. This interaction is critical for endosomal recruitment of RidL and for its inhibitory effects. RidL inhibits retromer activity by direct competition, in which it occupies the VPS29-binding site of the essential retromer regulator TBC1d5. The mechanism of retromer inhibition by RidL reveals a hotspot on VPS29 critical for recognition by its regulators that is also exploited by pathogens, and provides a structural basis for the development of small molecule inhibitors against the retromer.
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Nemec AA, Howell LA, Peterson AK, Murray MA, Tomko RJ. Autophagic clearance of proteasomes in yeast requires the conserved sorting nexin Snx4. J Biol Chem 2017; 292:21466-21480. [PMID: 29109144 DOI: 10.1074/jbc.m117.817999] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/03/2017] [Indexed: 11/06/2022] Open
Abstract
Turnover of the 26S proteasome by autophagy is an evolutionarily conserved process that governs cellular proteolytic capacity and eliminates inactive particles. In most organisms, proteasomes are located in both the nucleus and cytoplasm. However, the specific autophagy routes for nuclear and cytoplasmic proteasomes are unclear. Here, we investigate the spatial control of autophagic proteasome turnover in budding yeast (Saccharomyces cerevisiae). We found that nitrogen starvation-induced proteasome autophagy is independent of known nucleophagy pathways but is compromised when nuclear protein export is blocked. Furthermore, via pharmacological tethering of proteasomes to chromatin or the plasma membrane, we provide evidence that nuclear proteasomes at least partially disassemble before autophagic turnover, whereas cytoplasmic proteasomes remain largely intact. A targeted screen of autophagy genes identified a requirement for the conserved sorting nexin Snx4 in the autophagic turnover of proteasomes and several other large multisubunit complexes. We demonstrate that Snx4 cooperates with sorting nexins Snx41 and Snx42 to mediate proteasome turnover and is required for the formation of cytoplasmic proteasome puncta that accumulate when autophagosome formation is blocked. Together, our results support distinct mechanistic paths in the turnover of nuclear versus cytoplasmic proteasomes and point to a critical role for Snx4 in cytoplasmic agglomeration of proteasomes en route to autophagic destruction.
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Affiliation(s)
- Antonia A Nemec
- From the Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida 32306
| | - Lauren A Howell
- From the Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida 32306
| | - Anna K Peterson
- From the Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida 32306
| | - Matthew A Murray
- From the Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida 32306
| | - Robert J Tomko
- From the Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida 32306
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Starble R, Pokrywka NJ. The retromer subunit Vps26 mediates Notch signaling during Drosophila oogenesis. Mech Dev 2017; 149:1-8. [PMID: 29031909 DOI: 10.1016/j.mod.2017.10.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 09/29/2017] [Accepted: 10/10/2017] [Indexed: 02/08/2023]
Abstract
During endocytosis, molecules are internalized by the cell through the invagination of the plasma membrane. Endocytosis is required for proper cell function and for normal development in Drosophila. One component of the endocytic pathway is the retromer complex, which recycles transmembrane proteins to other parts of the cell such as the plasma membrane and the trans-Golgi network. Previous studies have shown that mutations to the retromer complex result in developmental defects in Drosophila. In humans, retromer dysfunction has been implicated in Alzheimer's and Parkinson's disease, but little is known about the role of the retromer complex in Drosophila oogenesis. In the current project, we examined the role of the retromer protein Vps26 in oogenesis by characterizing the phenotype of vps26 germline clones. Immunofluorescence was used to visualize the expression of membrane proteins and vesicular trafficking markers in mutant egg chambers. We find that vps26 germline clones exhibit a signaling defect between the germline cells and follicle cells indicated by an increase in LysoTracker staining of the border cells in the mutants. We show that this signaling defect in vps26 mutants may be the result of impaired Notch signaling based on the misexpression of multiple proteins in the Notch signaling pathway in vps26 mutants.
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Affiliation(s)
- Rebecca Starble
- Biology Department, Vassar College, 124 Raymond Ave., Poughkeepsie, NY 12604, United States
| | - Nancy J Pokrywka
- Biology Department, Vassar College, 124 Raymond Ave., Poughkeepsie, NY 12604, United States.
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Abubakar YS, Zheng W, Olsson S, Zhou J. Updated Insight into the Physiological and Pathological Roles of the Retromer Complex. Int J Mol Sci 2017; 18:ijms18081601. [PMID: 28757549 PMCID: PMC5577995 DOI: 10.3390/ijms18081601] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 07/20/2017] [Accepted: 07/21/2017] [Indexed: 12/13/2022] Open
Abstract
Retromer complexes mediate protein trafficking from the endosomes to the trans-Golgi network (TGN) or through direct recycling to the plasma membrane. In yeast, they consist of a conserved trimer of the cargo selective complex (CSC), Vps26-Vps35-Vps29 and a dimer of sorting nexins (SNXs), Vps5-Vps17. In mammals, the CSC interacts with different kinds of SNX proteins in addition to the mammalian homologues of Vps5 and Vps17, which further diversifies retromer functions. The retromer complex plays important roles in many cellular processes including restriction of invading pathogens. In this review, we summarize some recent developments in our understanding of the physiological and pathological functions of the retromer complex.
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Affiliation(s)
- Yakubu Saddeeq Abubakar
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Wenhui Zheng
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
- College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Stefan Olsson
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Jie Zhou
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
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40
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Lőrincz P, Mauvezin C, Juhász G. Exploring Autophagy in Drosophila. Cells 2017; 6:cells6030022. [PMID: 28704946 PMCID: PMC5617968 DOI: 10.3390/cells6030022] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 07/06/2017] [Accepted: 07/08/2017] [Indexed: 12/11/2022] Open
Abstract
Autophagy is a catabolic process in eukaryotic cells promoting bulk or selective degradation of cellular components within lysosomes. In recent decades, several model systems were utilized to dissect the molecular machinery of autophagy and to identify the impact of this cellular “self-eating” process on various physiological and pathological processes. Here we briefly discuss the advantages and limitations of using the fruit fly Drosophila melanogaster, a popular model in cell and developmental biology, to apprehend the main pathway of autophagy in a complete animal.
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Affiliation(s)
- Péter Lőrincz
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary.
| | - Caroline Mauvezin
- Catalan Institute of Oncology-IDIBELL, Laboratory of Cancer Metabolism (LMC), Hospital Duran i Reynals, 08908 Barcelona, Spain.
| | - Gábor Juhász
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, H-1117 Budapest, Hungary.
- Institute of Genetics, Biological Research Centre, Hungarian Academy of Sciences, H-6726 Szeged, Hungary.
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Lőrincz P, Tóth S, Benkő P, Lakatos Z, Boda A, Glatz G, Zobel M, Bisi S, Hegedűs K, Takáts S, Scita G, Juhász G. Rab2 promotes autophagic and endocytic lysosomal degradation. J Cell Biol 2017; 216:1937-1947. [PMID: 28483915 PMCID: PMC5496615 DOI: 10.1083/jcb.201611027] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 02/24/2017] [Accepted: 04/21/2017] [Indexed: 11/22/2022] Open
Abstract
Rab7 promotes fusion of autophagosomes and late endosomes with lysosomes. Lőrincz et al. show that Rab2 is critical for the delivery of autophagic and endocytic cargo to lysosomes and for their degradation, and that it promotes autophagosome–lysosome fusion. The results suggest Rab2 and Rab7 coordinately promote autophagic and endosomal degradation and lysosome function. Rab7 promotes fusion of autophagosomes and late endosomes with lysosomes in yeast and metazoan cells, acting together with its effector, the tethering complex HOPS. Here we show that another small GTPase, Rab2, is also required for autophagosome and endosome maturation and proper lysosome function in Drosophila melanogaster. We demonstrate that Rab2 binds to HOPS, and that its active, GTP-locked form associates with autolysosomes. Importantly, expression of active Rab2 promotes autolysosomal fusions unlike that of GTP-locked Rab7, suggesting that its amount is normally rate limiting. We also demonstrate that RAB2A is required for autophagosome clearance in human breast cancer cells. In conclusion, we identify Rab2 as a key factor for autophagic and endocytic cargo delivery to and degradation in lysosomes.
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Affiliation(s)
- Péter Lőrincz
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, Budapest H-1117, Hungary
| | - Sarolta Tóth
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, Budapest H-1117, Hungary
| | - Péter Benkő
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, Budapest H-1117, Hungary
| | - Zsolt Lakatos
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, Budapest H-1117, Hungary
| | - Attila Boda
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, Budapest H-1117, Hungary
| | - Gábor Glatz
- Institute of Genetics, Biological Research Centre, Hungarian Academy of Sciences, Szeged H-6726, Hungary
| | - Martina Zobel
- FIRC (Fondazione Italiana per la Ricerca sul Cancro) Institute of Molecular Oncology (IFOM), Milan 20139, Italy
| | - Sara Bisi
- FIRC (Fondazione Italiana per la Ricerca sul Cancro) Institute of Molecular Oncology (IFOM), Milan 20139, Italy
| | - Krisztina Hegedűs
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, Budapest H-1117, Hungary
| | - Szabolcs Takáts
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, Budapest H-1117, Hungary
| | - Giorgio Scita
- FIRC (Fondazione Italiana per la Ricerca sul Cancro) Institute of Molecular Oncology (IFOM), Milan 20139, Italy.,Department of Oncology and Hemato-Oncology, School of Medicine, University of Milan, Milan 20122, Italy
| | - Gábor Juhász
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, Budapest H-1117, Hungary .,Institute of Genetics, Biological Research Centre, Hungarian Academy of Sciences, Szeged H-6726, Hungary
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Lippai M, Szatmári Z. Autophagy-from molecular mechanisms to clinical relevance. Cell Biol Toxicol 2016; 33:145-168. [PMID: 27957648 DOI: 10.1007/s10565-016-9374-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 12/02/2016] [Indexed: 12/14/2022]
Abstract
Autophagy is a lysosomal degradation pathway of eukaryotic cells that is highly conserved from yeast to mammals. During this process, cooperating protein complexes are recruited in a hierarchic order to the phagophore assembly site (PAS) to mediate the elongation and closure of double-membrane vesicles called autophagosomes, which sequester cytosolic components and deliver their content to the endolysosomal system for degradation. As a major cytoprotective mechanism, autophagy plays a key role in the stress response against nutrient starvation, hypoxia, and infections. Although numerous studies reported that impaired function of core autophagy proteins also contributes to the development and progression of various human diseases such as neurodegenerative disorders, cardiovascular and muscle diseases, infections, and different types of cancer, the function of this process in human diseases remains unclear. Evidence often suggests a controversial role for autophagy in the pathomechanisms of these severe disorders. Here, we provide an overview of the molecular mechanisms of autophagy and summarize the recent advances on its function in human health and disease.
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Affiliation(s)
- Mónika Lippai
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, Pázmány Péter stny. 1/C, Budapest, 1117, Hungary
| | - Zsuzsanna Szatmári
- Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, Pázmány Péter stny. 1/C, Budapest, 1117, Hungary.
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43
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What lysosomes actually tell us about Parkinson's disease? Ageing Res Rev 2016; 32:140-149. [PMID: 26947123 DOI: 10.1016/j.arr.2016.02.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 02/19/2016] [Accepted: 02/29/2016] [Indexed: 12/18/2022]
Abstract
Parkinson's disease is a common neurodegenerative disorder of unknown origin mainly characterized by the loss of neuromelanin-containing dopaminergic neurons in the substantia nigra pars compacta and the presence of intraneuronal proteinaceous inclusions called Lewy bodies. Lysosomes are dynamic organelles that degrade, in a controlled manner, cellular components delivered via the secretory, endocytic, autophagic and phagocytic membrane-trafficking pathways. Increasing amounts of evidence suggest a central role of lysosomal impairment in PD aetiology. This review provides an update on how genetic evidence support this connection and highlights how the neuropathologic and mechanistic evidence might relate to the disease process in sporadic forms of Parkinson's disease. Finally, we discuss the influence of ageing on lysosomal impairment and PD aetiology and therapeutic strategies targeting lysosomal function.
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Sangaré LO, Alayi TD, Westermann B, Hovasse A, Sindikubwabo F, Callebaut I, Werkmeister E, Lafont F, Slomianny C, Hakimi MA, Van Dorsselaer A, Schaeffer-Reiss C, Tomavo S. Unconventional endosome-like compartment and retromer complex in Toxoplasma gondii govern parasite integrity and host infection. Nat Commun 2016; 7:11191. [PMID: 27064065 PMCID: PMC4831018 DOI: 10.1038/ncomms11191] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 02/26/2016] [Indexed: 12/31/2022] Open
Abstract
Membrane trafficking pathways play critical roles in Apicomplexa, a phylum of protozoan parasites that cause life-threatening diseases worldwide. Here we report the first retromer-trafficking interactome in Toxoplasma gondii. This retromer complex includes a trimer Vps35-Vps26-Vps29 core complex that serves as a hub for the endosome-like compartment and parasite-specific proteins. Conditional ablation of TgVps35 reveals that the retromer complex is crucial for the biogenesis of secretory organelles and for maintaining parasite morphology. We identify TgHP12 as a parasite-specific and retromer-associated protein with functions unrelated to secretory organelle formation. Furthermore, the major facilitator superfamily homologue named TgHP03, which is a multiple spanning and ligand transmembrane transporter, is maintained at the parasite membrane by retromer-mediated endocytic recycling. Thus, our findings highlight that both evolutionarily conserved and unconventional proteins act in concert in T. gondii by controlling retrograde transport that is essential for parasite integrity and host infection.
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Affiliation(s)
- Lamba Omar Sangaré
- Center for Infection and Immunity of Lille, INSERM U 1019, CNRS UMR 8204, Institut Pasteur de Lille, Université de Lille, 59000 Lille, France
| | - Tchilabalo Dilezitoko Alayi
- Laboratory of Bio-Organic Mass Spectrometry, IPHC, CNRS UMR 7178, Université de Strasbourg, 67087 Strasbourg, France
- Plateforme de Protéomique et des Peptides Modifiés (P3M), Institut Pasteur de Lille, CNRS, Université de Lille, 59000 Lille, France
| | - Benoit Westermann
- Laboratory of Bio-Organic Mass Spectrometry, IPHC, CNRS UMR 7178, Université de Strasbourg, 67087 Strasbourg, France
| | - Agnes Hovasse
- Laboratory of Bio-Organic Mass Spectrometry, IPHC, CNRS UMR 7178, Université de Strasbourg, 67087 Strasbourg, France
| | | | - Isabelle Callebaut
- CNRS UMR7590, Sorbonne Universités, Université Pierre et Marie Curie-Paris 6, MNHN, IRD-IUC, Paris 75005, France
| | | | - Frank Lafont
- Bioimaging Platform, IBL, CNRS, Université de Lille, 59000 Lille, France
| | - Christian Slomianny
- Laboratory of Cell Physiology, INSERM U 1003, Université de Lille, 59655 Villeneuve d'Ascq, France
| | | | - Alain Van Dorsselaer
- Laboratory of Bio-Organic Mass Spectrometry, IPHC, CNRS UMR 7178, Université de Strasbourg, 67087 Strasbourg, France
| | - Christine Schaeffer-Reiss
- Laboratory of Bio-Organic Mass Spectrometry, IPHC, CNRS UMR 7178, Université de Strasbourg, 67087 Strasbourg, France
| | - Stanislas Tomavo
- Center for Infection and Immunity of Lille, INSERM U 1019, CNRS UMR 8204, Institut Pasteur de Lille, Université de Lille, 59000 Lille, France
- Plateforme de Protéomique et des Peptides Modifiés (P3M), Institut Pasteur de Lille, CNRS, Université de Lille, 59000 Lille, France
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45
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Zheng W, Zhou J, He Y, Xie Q, Chen A, Zheng H, Shi L, Zhao X, Zhang C, Huang Q, Fang K, Lu G, Ebbole DJ, Li G, Naqvi NI, Wang Z. Retromer Is Essential for Autophagy-Dependent Plant Infection by the Rice Blast Fungus. PLoS Genet 2015; 11:e1005704. [PMID: 26658729 PMCID: PMC4686016 DOI: 10.1371/journal.pgen.1005704] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 11/05/2015] [Indexed: 11/19/2022] Open
Abstract
The retromer mediates protein trafficking through recycling cargo from endosomes to the trans-Golgi network in eukaryotes. However, the role of such trafficking events during pathogen-host interaction remains unclear. Here, we report that the cargo-recognition complex (MoVps35, MoVps26 and MoVps29) of the retromer is essential for appressorium-mediated host penetration by Magnaporthe oryzae, the causal pathogen of the blast disease in rice. Loss of retromer function blocked glycogen distribution and turnover of lipid bodies, delayed nuclear degeneration and reduced turgor during appressorial development. Cytological observation revealed dynamic MoVps35-GFP foci co-localized with autophagy-related protein RFP-MoAtg8 at the periphery of autolysosomes. Furthermore, RFP-MoAtg8 interacted with MoVps35-GFP in vivo, RFP-MoAtg8 was mislocalized to the vacuole and failed to recycle from the autolysosome in the absence of the retromer function, leading to impaired biogenesis of autophagosomes. We therefore conclude that retromer is essential for autophagy-dependent plant infection by the rice blast fungus.
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Affiliation(s)
- Wenhui Zheng
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- Fujian University Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Jie Zhou
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- Fujian University Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Yunlong He
- Temasek Life Sciences Laboratory and Department of Biological Sciences, National University of Singapore, Singapore
| | - Qiurong Xie
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- Fujian University Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Ahai Chen
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- Fujian University Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Huawei Zheng
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- Fujian University Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Lei Shi
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- Fujian University Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Xu Zhao
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- Fujian University Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Chengkang Zhang
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- Fujian University Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Qingping Huang
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- Fujian University Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Kunhai Fang
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- Fujian University Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Guodong Lu
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- Fujian University Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Daniel J. Ebbole
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, Texas, United States of America
| | - Guangpu Li
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, United States of America
| | - Naweed I. Naqvi
- Temasek Life Sciences Laboratory and Department of Biological Sciences, National University of Singapore, Singapore
- * E-mail: (NIN); (ZW)
| | - Zonghua Wang
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- Fujian University Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- * E-mail: (NIN); (ZW)
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