1
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Zou J, Mitra K, Anees P, Oettinger D, Ramirez JR, Veetil AT, Gupta PD, Rao R, Smith JJ, Kratsios P, Krishnan Y. A DNA nanodevice for mapping sodium at single-organelle resolution. Nat Biotechnol 2024; 42:1075-1083. [PMID: 37735265 PMCID: PMC11004682 DOI: 10.1038/s41587-023-01950-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 08/15/2023] [Indexed: 09/23/2023]
Abstract
Cellular sodium ion (Na+) homeostasis is integral to organism physiology. Our current understanding of Na+ homeostasis is largely limited to Na+ transport at the plasma membrane. Organelles may also contribute to Na+ homeostasis; however, the direction of Na+ flow across organelle membranes is unknown because organellar Na+ cannot be imaged. Here we report a pH-independent, organelle-targetable, ratiometric probe that reports lumenal Na+. It is a DNA nanodevice containing a Na+-sensitive fluorophore, a reference dye and an organelle-targeting domain. By measuring Na+ at single endosome resolution in mammalian cells and Caenorhabditis elegans, we discovered that lumenal Na+ levels in each stage of the endolysosomal pathway exceed cytosolic levels and decrease as endosomes mature. Further, we find that lysosomal Na+ levels in nematodes are modulated by the Na+/H+ exchanger NHX-5 in response to salt stress. The ability to image subcellular Na+ will unveil mechanisms of Na+ homeostasis at an increased level of cellular detail.
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Affiliation(s)
- Junyi Zou
- Department of Chemistry, The University of Chicago, Chicago, IL, USA
- Neuroscience Institute, The University of Chicago, Chicago, IL, USA
| | - Koushambi Mitra
- Department of Chemistry, The University of Chicago, Chicago, IL, USA
- Neuroscience Institute, The University of Chicago, Chicago, IL, USA
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, USA
| | - Palapuravan Anees
- Department of Chemistry, The University of Chicago, Chicago, IL, USA
- Neuroscience Institute, The University of Chicago, Chicago, IL, USA
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, USA
| | - Daphne Oettinger
- Department of Chemistry, The University of Chicago, Chicago, IL, USA
- Neuroscience Institute, The University of Chicago, Chicago, IL, USA
| | - Joseph R Ramirez
- Department of Chemistry, The University of Chicago, Chicago, IL, USA
- Neuroscience Institute, The University of Chicago, Chicago, IL, USA
| | - Aneesh Tazhe Veetil
- Department of Chemistry, The University of Chicago, Chicago, IL, USA
- Neuroscience Institute, The University of Chicago, Chicago, IL, USA
| | - Priyanka Dutta Gupta
- Department of Chemistry, The University of Chicago, Chicago, IL, USA
- Neuroscience Institute, The University of Chicago, Chicago, IL, USA
| | - Rajini Rao
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jayson J Smith
- Neuroscience Institute, The University of Chicago, Chicago, IL, USA
- Department of Neurobiology, The University of Chicago, Chicago, IL, USA
| | - Paschalis Kratsios
- Neuroscience Institute, The University of Chicago, Chicago, IL, USA
- Department of Neurobiology, The University of Chicago, Chicago, IL, USA
| | - Yamuna Krishnan
- Department of Chemistry, The University of Chicago, Chicago, IL, USA.
- Neuroscience Institute, The University of Chicago, Chicago, IL, USA.
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, USA.
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2
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Liu J, Shen T, Zhang Y, Wei X, Bao Y, Ai R, Gan S, Wang D, Lai X, Zhao L, Zhou W, Fang X. Cell dehydration enables massive production of engineered membrane vesicles with therapeutic functions. J Extracell Vesicles 2024; 13:e12483. [PMID: 39051765 PMCID: PMC11270585 DOI: 10.1002/jev2.12483] [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: 11/03/2023] [Revised: 05/12/2024] [Accepted: 06/27/2024] [Indexed: 07/27/2024] Open
Abstract
Extracellular vesicles (EVs) have emerged as promising biomaterials for the treatment of different disease. However, only handful types of EVs with clinical transformation potential have been reported to date, and their preparation on a large scale under biosafety-controlled conditions is limited. In this study, we characterize a novel type of EV with promising clinical application potential: dehydration-induced extracellular vesicles (DIMVs). DIMV is a type of micron-diameter cell vesicle that contains more bioactive molecules, such as proteins and RNA, but not DNA, than previously reported cell vesicles. The preparation of DIMV is extraordinarily straightforward, which possesses a high level of biosafety, and the protein utilization ratio is roughly 600 times greater than that of naturally secreted EVs. Additional experiments demonstrate the viability of pre- or post-isolation DIMV modification, including gene editing, nucleic acid encapsulation or surface anchoring, size adjustment. Finally, on animal models, we directly show the biosafety and immunogenicity of DIMV, and investigate its potential application as tumour vaccine or drug carrier in cancer treatment.
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Affiliation(s)
- Jie Liu
- School of Life SciencesFaculty of MedicineTianjin UniversityTianjinPR China
- Hangzhou Institute of Medicine (HIM)University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Chinese Academy of SciencesHangzhouZhejiangPR China
| | - Tingting Shen
- Hangzhou Institute of Medicine (HIM)University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Chinese Academy of SciencesHangzhouZhejiangPR China
| | - Yu Zhang
- Hangzhou Institute of Medicine (HIM)University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Chinese Academy of SciencesHangzhouZhejiangPR China
| | - Xiaojian Wei
- Hangzhou Institute of Medicine (HIM)University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Chinese Academy of SciencesHangzhouZhejiangPR China
| | - Yuting Bao
- Hangzhou Institute of Medicine (HIM)University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Chinese Academy of SciencesHangzhouZhejiangPR China
| | - Rui Ai
- Hangzhou Institute of Medicine (HIM)University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Chinese Academy of SciencesHangzhouZhejiangPR China
- School of Molecular MedicineHangzhou Institute for Advanced Study, UCASHangzhouPR China
| | - Shaoju Gan
- Hangzhou Institute of Medicine (HIM)University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Chinese Academy of SciencesHangzhouZhejiangPR China
| | - Dachi Wang
- Hangzhou Institute of Medicine (HIM)University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Chinese Academy of SciencesHangzhouZhejiangPR China
| | - Xin Lai
- Hangzhou Institute of Medicine (HIM)University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Chinese Academy of SciencesHangzhouZhejiangPR China
| | - Libo Zhao
- Department of R&DEcho Biotech Co., LtdBeijingPR China
| | - Wei Zhou
- Hangzhou Institute of Medicine (HIM)University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Chinese Academy of SciencesHangzhouZhejiangPR China
| | - Xiaohong Fang
- School of Life SciencesFaculty of MedicineTianjin UniversityTianjinPR China
- Hangzhou Institute of Medicine (HIM)University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Chinese Academy of SciencesHangzhouZhejiangPR China
- Beijing National Research Center for Molecular Sciences, Institute of Chemistry, Key Laboratory of Molecular Nanostructure and NanotechnologyChinese Academy of ScienceBeijingPR China
- School of Molecular MedicineHangzhou Institute for Advanced Study, UCASHangzhouPR China
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3
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Nasrollahpour H, Mirzaie A, Sharifi M, Rezabakhsh A, Khalilzadeh B, Rahbarghazi R, Yousefi H, Klionsky DJ. Biosensors; a novel concept in real-time detection of autophagy. Biosens Bioelectron 2024; 254:116204. [PMID: 38507929 DOI: 10.1016/j.bios.2024.116204] [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: 05/27/2023] [Revised: 02/23/2024] [Accepted: 03/09/2024] [Indexed: 03/22/2024]
Abstract
Autophagy is an early-stage response with self-degradation properties against several insulting conditions. To date, the critical role of autophagy has been well-documented in physiological and pathological conditions. This process involves various signaling and functional biomolecules, which are involved in different steps of the autophagic response. During recent decades, a range of biochemical analyses, chemical assays, and varied imaging techniques have been used for monitoring this pathway. Due to the complexity and dynamic aspects of autophagy, the application of the conventional methodology for following autophagic progression is frequently associated with a mistake in discrimination between a complete and incomplete autophagic response. Biosensors provide a de novo platform for precise and accurate analysis of target molecules in different biological settings. It has been suggested that these devices are applicable for real-time monitoring and highly sensitive detection of autophagy effectors. In this review article, we focus on cutting-edge biosensing technologies associated with autophagy detection.
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Affiliation(s)
| | - Arezoo Mirzaie
- Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Maryam Sharifi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Aysa Rezabakhsh
- Cardiovascular Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Balal Khalilzadeh
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Reza Rahbarghazi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Applied Cellular Sciences, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Hadi Yousefi
- Department of Applied Cellular Sciences, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Daniel J Klionsky
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA.
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4
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Wang X, Ge X, Zhang M, Sun J, Ouyang J, Na N. A dynamic cascade DNA nanocomplex to synergistically disrupt the pyroptosis checkpoint and relieve tumor hypoxia for efficient pyroptosis cancer therapy. Chem Sci 2024; 15:7079-7091. [PMID: 38756797 PMCID: PMC11095510 DOI: 10.1039/d4sc01147c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Accepted: 04/12/2024] [Indexed: 05/18/2024] Open
Abstract
Pyroptosis has attracted widespread concerns in cancer therapy, while the therapeutic efficiency could be significantly restricted by using the crucial pyroptosis checkpoint of autophagy and tumor hypoxia. Herein, a DNA nanocomplex (DNFs@ZnMn), containing cascade DNAzymes, promoter-like ZnO2-Mn nanozymes and photosensitizers, was constructed in one pot through rolling circle amplification reactions to induce pyroptosis through disrupting autophagy. After targeting cancer cells with a high expression of H+ and glutathione, DNFs@ZnMn decomposed to expose DNAzymes and promoter-like ZnO2-Mn nanozymes. Then, sufficient metal ions and O2 were released to promote cascade DNA/RNA cleavage and relieving of tumor hypoxia. The released DNAzyme-1 self-cleaved long DNA strands with Zn2+ as the cofactor and simultaneously exposed DNAzyme-2 to cleave ATG-5 mRNA (with Mn2+ as the cofactor). This cascade DNAzyme-mediated gene regulation process induced downregulation of ATG-5 proteins to disrupt autophagy. Simultaneously, the released ZnO2 donated sufficient H2O2 to generate adequate O2 to relieve tumor hypoxia, obtaining highly cytotoxic 1O2 to trigger pyroptosis. By using dynamic cascade gene silencing to disrupt the pyroptosis checkpoint and synergistic relieving of hypoxia, this DNA nanocomplex significantly weakened cellular resistance to achieve efficient pyroptosis therapy both in vitro and in vivo.
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Affiliation(s)
- Xiaoni Wang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University Beijing 100875 China
| | - Xiyang Ge
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University Beijing 100875 China
| | - Min Zhang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University Beijing 100875 China
| | - Jianghui Sun
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University Beijing 100875 China
| | - Jin Ouyang
- Department of Chemistry, College of Arts and Sciences, Beijing Normal University at Zhuhai Zhuhai City Guangdong Province 519087 China
| | - Na Na
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University Beijing 100875 China
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5
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Da Graça J, Delevoye C, Morel E. Morphodynamical adaptation of the endolysosomal system to stress. FEBS J 2024. [PMID: 38706230 DOI: 10.1111/febs.17154] [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: 11/27/2023] [Revised: 03/28/2024] [Accepted: 04/25/2024] [Indexed: 05/07/2024]
Abstract
In eukaryotes, the spatiotemporal control of endolysosomal organelles is central to the maintenance of homeostasis. By providing an interface between the cytoplasm and external environment, the endolysosomal system is placed at the forefront of the response to a wide range of stresses faced by cells. Endosomes are equipped with a dedicated set of membrane-associated proteins that ensure endosomal functions as well as crosstalk with the secretory or the autophagy pathways. Morphodynamical processes operate through local spatialization of subdomains, enabling specific remodeling and membrane contact capabilities. Consequently, the plasticity of endolysosomal organelles can be considered a robust and flexible tool exploited by cells to cope with homeostatic deviations. In this review, we provide insights into how the cellular responses to various stresses (osmotic, UV, nutrient deprivation, or pathogen infections) rely on the adaptation of the endolysosomal system morphodynamics.
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Affiliation(s)
- Juliane Da Graça
- Université Paris Cité, INSERM UMR-S1151, CNRS UMR-S8253, Institut Necker Enfants Malades, France
| | - Cédric Delevoye
- Université Paris Cité, INSERM UMR-S1151, CNRS UMR-S8253, Institut Necker Enfants Malades, France
- Institut Curie, PSL Research University, CNRS, UMR144, Structure and Membrane Compartments, Paris, France
| | - Etienne Morel
- Université Paris Cité, INSERM UMR-S1151, CNRS UMR-S8253, Institut Necker Enfants Malades, France
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6
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Lukas F, Matthaeus C, López-Hernández T, Lahmann I, Schultz N, Lehmann M, Puchkov D, Pielage J, Haucke V, Maritzen T. Canonical and non-canonical integrin-based adhesions dynamically interconvert. Nat Commun 2024; 15:2093. [PMID: 38453931 PMCID: PMC10920918 DOI: 10.1038/s41467-024-46381-x] [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: 03/06/2023] [Accepted: 02/22/2024] [Indexed: 03/09/2024] Open
Abstract
Adhesions are critical for anchoring cells in their environment, as signaling platforms and for cell migration. In line with these diverse functions different types of cell-matrix adhesions have been described. Best-studied are the canonical integrin-based focal adhesions. In addition, non-canonical integrin adhesions lacking focal adhesion proteins have been discovered. These include reticular adhesions also known as clathrin plaques or flat clathrin lattices, that are enriched in clathrin and other endocytic proteins, as well as extensive adhesion networks and retraction fibers. How these different adhesion types that share a common integrin backbone are related and whether they can interconvert is unknown. Here, we identify the protein stonin1 as a marker for non-canonical αVβ5 integrin-based adhesions and demonstrate by live cell imaging that canonical and non-canonical adhesions can reciprocally interconvert by the selective exchange of components on a stable αVβ5 integrin scaffold. Hence, non-canonical adhesions can serve as points of origin for the generation of canonical focal adhesions.
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Affiliation(s)
- Fabian Lukas
- Department for Nanophysiology, RPTU Kaiserslautern-Landau, Paul-Ehrlich-Straße 23, 67663, Kaiserslautern, Germany
- Membrane Traffic and Cell Motility Group, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Roessle-Straße 10, 13125, Berlin, Germany
| | - Claudia Matthaeus
- Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, 50 South Drive, Building 50, Bethesda, MD, 20892, USA
- Department for Molecular Pharmacology and Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Roessle-Straße 10, 13125, Berlin, Germany
| | - Tania López-Hernández
- Department for Molecular Pharmacology and Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Roessle-Straße 10, 13125, Berlin, Germany
| | - Ines Lahmann
- Developmental Biology/Signal Transduction Group, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Robert-Rössle-Straße 10, 13125, Berlin, Germany
| | - Nicole Schultz
- Department for Nanophysiology, RPTU Kaiserslautern-Landau, Paul-Ehrlich-Straße 23, 67663, Kaiserslautern, Germany
| | - Martin Lehmann
- Cellular Imaging Facility, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Roessle-Straße 10, 13125, Berlin, Germany
| | - Dmytro Puchkov
- Cellular Imaging Facility, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Roessle-Straße 10, 13125, Berlin, Germany
| | - Jan Pielage
- Department for Zoology and Neurobiology, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 13, 67663, Kaiserslautern, Germany
| | - Volker Haucke
- Department for Molecular Pharmacology and Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Roessle-Straße 10, 13125, Berlin, Germany
- Faculty of Biology, Chemistry, Pharmacy, Freie Universität Berlin, 14195, Berlin, Germany
- NeuroCure Cluster of Excellence, Charité Universitätsmedizin Berlin, 10117, Berlin, Germany
| | - Tanja Maritzen
- Department for Nanophysiology, RPTU Kaiserslautern-Landau, Paul-Ehrlich-Straße 23, 67663, Kaiserslautern, Germany.
- Membrane Traffic and Cell Motility Group, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Roessle-Straße 10, 13125, Berlin, Germany.
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7
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Rahane D, Dhingra T, Chalavady G, Datta A, Ghosh B, Rana N, Borah A, Saraf S, Bhattacharya P. Hypoxia and its effect on the cellular system. Cell Biochem Funct 2024; 42:e3940. [PMID: 38379257 DOI: 10.1002/cbf.3940] [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: 10/31/2023] [Revised: 01/08/2024] [Accepted: 01/11/2024] [Indexed: 02/22/2024]
Abstract
Eukaryotic cells utilize oxygen for different functions of cell organelles owing to cellular survival. A balanced oxygen homeostasis is an essential requirement to maintain the regulation of normal cellular systems. Any changes in the oxygen level are stressful and can alter the expression of different homeostasis regulatory genes and proteins. Lack of oxygen or hypoxia results in oxidative stress and formation of hypoxia inducible factors (HIF) and reactive oxygen species (ROS). Substantial cellular damages due to hypoxia have been reported to play a major role in various pathological conditions. There are different studies which demonstrated that the functions of cellular system are disrupted by hypoxia. Currently, study on cellular effects following hypoxia is an important field of research as it not only helps to decipher different signaling pathway modulation, but also helps to explore novel therapeutic strategies. On the basis of the beneficial effect of hypoxia preconditioning of cellular organelles, many therapeutic investigations are ongoing as a promising disease management strategy in near future. Hence, the present review discusses about the effects of hypoxia on different cellular organelles, mechanisms and their involvement in the progression of different diseases.
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Affiliation(s)
- Dipali Rahane
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gandhinagar, Gujarat, India
| | - Tannu Dhingra
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gandhinagar, Gujarat, India
| | - Guruswami Chalavady
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gandhinagar, Gujarat, India
| | - Aishika Datta
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gandhinagar, Gujarat, India
| | - Bijoyani Ghosh
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gandhinagar, Gujarat, India
| | - Nikita Rana
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gandhinagar, Gujarat, India
| | - Anupom Borah
- Cellular and Molecular Neurobiology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, India
| | - Shailendra Saraf
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gandhinagar, Gujarat, India
| | - Pallab Bhattacharya
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gandhinagar, Gujarat, India
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8
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Chauhan N, Patro BS. Emerging roles of lysosome homeostasis (repair, lysophagy and biogenesis) in cancer progression and therapy. Cancer Lett 2024; 584:216599. [PMID: 38135207 DOI: 10.1016/j.canlet.2023.216599] [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: 09/28/2023] [Revised: 11/30/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023]
Abstract
In the era of personalized therapy, precise targeting of subcellular organelles holds great promise for cancer modality. Taking into consideration that lysosome represents the intersection site in numerous endosomal trafficking pathways and their modulation in cancer growth, progression, and resistance against cancer therapies, the lysosome is proposed as an attractive therapeutic target for cancer treatment. Based on the recent advances, the current review provides a comprehensive understanding of molecular mechanisms of lysosome homeostasis under 3R responses: Repair, Removal (lysophagy) and Regeneration of lysosomes. These arms of 3R responses have distinct role in lysosome homeostasis although their interdependency along with switching between the pathways still remain elusive. Recent advances underpinning the crucial role of (1) ESCRT complex dependent/independent repair of lysosome, (2) various Galectins-based sensing and ubiquitination in lysophagy and (3) TFEB/TFE proteins in lysosome regeneration/biogenesis of lysosome are outlined. Later, we also emphasised how these recent advancements may aid in development of phytochemicals and pharmacological agents for targeting lysosomes for efficient cancer therapy. Some of these lysosome targeting agents, which are now at various stages of clinical trials and patents, are also highlighted in this review.
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Affiliation(s)
- Nitish Chauhan
- Bio-Organic Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, Maharashtra, 400094, India
| | - Birija Sankar Patro
- Bio-Organic Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, Maharashtra, 400094, India.
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9
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Kurimoto D, Hue Anh TD, Kasama R, Sato A. Intracellularly delivered human lactoferrin functions as an activator of Na +/H + exchanger 7. Biochem Biophys Res Commun 2024; 695:149480. [PMID: 38215552 DOI: 10.1016/j.bbrc.2024.149480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 12/21/2023] [Accepted: 01/04/2024] [Indexed: 01/14/2024]
Abstract
Here, we report that human lactoferrin (hLF), known for its anticancer properties, induced intracellular activation of the Na+/H+ exchanger (NHE) 7 in human lung cancer PC-9 cells. Compared to non-fused hLF, the fusion of human serum albumin (HSA) with hLF (hLF-HSA) facilitated its internalization into PC-9 cells in a caveolae-mediated manner, thereby exhibiting enhanced anti-proliferative effects. Although hLF alone did not exhibit any discernible effects, hLF-HSA resulted in organelle alkalization as detected using an acidotropic pH indicator. hLF-HSA-induced elevation of organelle pH and inhibition of cancer growth were abolished by NHE7 siRNA. hLF-HSA upregulated NHE7. Thus, upon cellular uptake, hLF-HSA triggers proton leakage through the upregulation of NHE7. This process led to organelle alkalization, probably in the trans-Golgi network (TGN) as suggested by the localization of NHE7 in PC-9 cells, thereby suppressing lung cancer cell growth. Forcing the cellular uptake of hLF alone using a caveolae-mediated endocytosis activator led to an increase in organelle pH. Furthermore, cell entry of hLF also activated proton-loading NHE7, leading to organelle acidification in the pancreatic cancer cell line MIA PaCa-2. Therefore, the intracellularly delivered hLF functions as an activator of NHE7.
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Affiliation(s)
- Daisuke Kurimoto
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo, 192-0982, Japan
| | - Truong Dinh Hue Anh
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo, 192-0982, Japan
| | - Ryoya Kasama
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo, 192-0982, Japan
| | - Atsushi Sato
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo, 192-0982, Japan.
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10
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Yao Y, Xu Y, Yu L, Xue T, Xiao Z, Tin P, Fung H, Ma H, Yun J, Yam JWP. NHE7 upregulation potentiates the uptake of small extracellular vesicles by enhancing maturation of macropinosomes in hepatocellular carcinoma. Cancer Commun (Lond) 2024; 44:251-272. [PMID: 38152992 PMCID: PMC10876205 DOI: 10.1002/cac2.12515] [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: 03/06/2023] [Revised: 12/13/2023] [Accepted: 12/18/2023] [Indexed: 12/29/2023] Open
Abstract
BACKGROUND Small extracellular vesicles (sEVs) mediate intercellular communication that contributes to hepatocellular carcinoma (HCC) progression via multifaceted pathways. The success of cell entry determines the effect of sEV on recipient cells. Here, we aimed to delineate the mechanisms underlying the uptake of sEV in HCC. METHODS Macropinocytosis was examined by the ability of cells to internalize dextran and sEV. Macropinocytosis was analyzed in Na(+)/H(+) exchanger 7 (NHE7)-knockdown and -overexpressing cells. The properties of cells were studied using functional assays. pH biosensor was used to evaluate the intracellular and endosomal pH. The expression of NHE7 in patients' liver tissues was examined by immunofluorescent staining. Inducible silencing of NHE7 in established tumors was performed to reveal the therapeutic potential of targeting NHE7. RESULTS The data revealed that macropinocytosis controlled the internalization of sEVs and their oncogenic effect on recipient cells. It was found that metastatic HCC cells exhibited the highest efficiency of sEV uptake relative to normal liver cells and non-metastatic HCC cells. Attenuation of macropinocytic activity by 5-(N-ethyl-N-isopropyl)-amiloride (EIPA) limited the entry of sEVs and compromised cell aggressiveness. Mechanistically, we delineated that high level of NHE7, a sodium-hydrogen exchanger, alkalized intracellular pH and acidized endosomal pH, leading to the maturation of macropinosomes. Inducible inhibition of NHE7 in established tumors developed in mice delayed tumor development and suppressed lung metastasis. Clinically, NHE7 expression was upregulated and linked to dismal prognosis of HCC. CONCLUSIONS This study advances the understanding that NHE7 enhances sEV uptake by macropinocytosis to promote the malignant properties of HCC cells. Inhibition of sEV uptake via macropinocytosis can be exploited as a treatment alone or in combination with conventional therapeutic approaches for HCC.
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Affiliation(s)
- Yue Yao
- Department of PathologySchool of Clinical MedicineLi Ka Shing Faculty of MedicineThe University of Hong KongHong KongP. R. China
- Department of Endocrinology and MetabolismSecond Affiliated Hospital of Harbin Medical UniversityHarbinHeilongjingP. R. China
| | - Yi Xu
- Department of PathologySchool of Clinical MedicineLi Ka Shing Faculty of MedicineThe University of Hong KongHong KongP. R. China
- Department of Hepatopancreatobiliary SurgerySecond Affiliated Hospital of Harbin Medical UniversityHarbinHeilongjingP. R. China
- State Key Laboratory of Oncology in South ChinaCancer Center of Sun Yat‐sen UniversityGuangzhouGuangdongP. R. China
| | - Liang Yu
- Department of PathologySchool of Clinical MedicineLi Ka Shing Faculty of MedicineThe University of Hong KongHong KongP. R. China
- Department of Hepatopancreatobiliary SurgerySecond Affiliated Hospital of Harbin Medical UniversityHarbinHeilongjingP. R. China
| | - Ting‐Mao Xue
- Department of PathologySchool of Clinical MedicineLi Ka Shing Faculty of MedicineThe University of Hong KongHong KongP. R. China
- Department of Hepatobiliary Surgery IIZhujiang HospitalSouthern Medical UniversityGuangzhouGuangdongP. R. China
| | - Zhi‐Jie Xiao
- Scientific Research CenterThe Seventh Affiliated HospitalSun Yat‐sen UniversityShenzhenGuangdongP. R. China
| | - Pui‐Chi Tin
- Department of PathologySchool of Clinical MedicineLi Ka Shing Faculty of MedicineThe University of Hong KongHong KongP. R. China
| | - Hiu‐Ling Fung
- Department of PathologySchool of Clinical MedicineLi Ka Shing Faculty of MedicineThe University of Hong KongHong KongP. R. China
| | - Hoi‐Tang Ma
- Department of PathologySchool of Clinical MedicineLi Ka Shing Faculty of MedicineThe University of Hong KongHong KongP. R. China
- State Key Laboratory of Liver ResearchThe University of Hong KongHong KongP. R. China
| | - Jing‐Ping Yun
- Department of PathologyCancer Center of Sun Yat‐sen UniversityGuangzhouGuangdongP. R. China
| | - Judy Wai Ping Yam
- Department of PathologySchool of Clinical MedicineLi Ka Shing Faculty of MedicineThe University of Hong KongHong KongP. R. China
- State Key Laboratory of Liver ResearchThe University of Hong KongHong KongP. R. China
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11
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Wei X, Huang H, Guo J, Li N, Li Q, Zhao T, Yang G, Cai L, Yang H, Wu C, Liu Y. Biomimetic Nano-Immunoactivator via Ionic Metabolic Modulation for Strengthened NIR-II Photothermal Immunotherapy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2304370. [PMID: 37587781 DOI: 10.1002/smll.202304370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Indexed: 08/18/2023]
Abstract
Reprogramming the immunologically "cold" environment of solid tumors is currently becoming the mainstream strategy to elicit powerful and systemic anticancer immunity. Here, a facile and biomimetic nano-immunnoactivator (CuS/Z@M4T1 ) is detailed by engineering a Zn2+ -bonded zeolitic imidazolate framework-8 (ZIF-8) with CuS nanodots (NDs) and cancer cell membrane for amplified near-infrared-II (NIR-II) photothermal immunotherapy via Zn2+ metabolic modulation. Taking advantage of the NIR-II photothermal effect of CuS NDs and the acidic responsiveness of ZIF-8, CuS/Z@M4T1 rapidly causes intracellular Zn2+ pool overload and disturbs the metabolic flux of 4T1 cells, which effectively hamper the production of heat shock proteins and relieve the resistance of photothermal therapy (PTT). Thus, amplified immunogenic cell death is evoked and initiates the immune cascade both in vivo and in vitro as demonstrated by dendritic cells maturation and T-cell infiltration. Further combination with antiprogrammed death 1 (aPD-1) achieves escalated antitumor efficacy which eliminates the primary, distant tumor and avidly inhibits lung metastasis due to cooperation of enhanced photothermal stimulation and empowerment of cytotoxic T lymphocytes by aPD-1. Collectively, this work provides the first report of using the intrinsic modulation property of meta-organometallic ZIF-8 for enhanced cancer photoimmunotherapy together with aPD-1, thereby inspiring a novel combined paradigm of ion-rich nanomaterials for cancer treatment.
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Affiliation(s)
- Xiaodan Wei
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, and School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Honglin Huang
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, and School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Junhan Guo
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, and School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Ningxi Li
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, and School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Qingzhi Li
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, and School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Tian Zhao
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, and School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Geng Yang
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, and School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Lulu Cai
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, and School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Hong Yang
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, and School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Chunhui Wu
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, and School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Yiyao Liu
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, and School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
- TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, No. 39 Shi-er-qiao Road, Chengdu, Sichuan, 610072, P. R. China
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12
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Ebner M, Puchkov D, López-Ortega O, Muthukottiappan P, Su Y, Schmied C, Zillmann S, Nikonenko I, Koddebusch J, Dornan GL, Lucht MT, Koka V, Jang W, Koch PA, Wallroth A, Lehmann M, Brügger B, Pende M, Winter D, Haucke V. Nutrient-regulated control of lysosome function by signaling lipid conversion. Cell 2023; 186:5328-5346.e26. [PMID: 37883971 DOI: 10.1016/j.cell.2023.09.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 08/04/2023] [Accepted: 09/27/2023] [Indexed: 10/28/2023]
Abstract
Lysosomes serve dual antagonistic functions in cells by mediating anabolic growth signaling and the catabolic turnover of macromolecules. How these janus-faced activities are regulated in response to cellular nutrient status is poorly understood. We show here that lysosome morphology and function are reversibly controlled by a nutrient-regulated signaling lipid switch that triggers the conversion between peripheral motile mTOR complex 1 (mTORC1) signaling-active and static mTORC1-inactive degradative lysosomes clustered at the cell center. Starvation-triggered relocalization of phosphatidylinositol 4-phosphate (PI(4)P)-metabolizing enzymes reshapes the lysosomal surface proteome to facilitate lysosomal proteolysis and to repress mTORC1 signaling. Concomitantly, lysosomal phosphatidylinositol 3-phosphate (PI(3)P), which marks motile signaling-active lysosomes in the cell periphery, is erased. Interference with this PI(3)P/PI(4)P lipid switch module impairs the adaptive response of cells to altering nutrient supply. Our data unravel a key function for lysosomal phosphoinositide metabolism in rewiring organellar membrane dynamics in response to cellular nutrient status.
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Affiliation(s)
- Michael Ebner
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | - Dmytro Puchkov
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | - Orestes López-Ortega
- Université Paris Cité, INSERM UMR-S1151, CNRS UMR-S8253, Institut Necker Enfants Malades, Paris, France
| | - Pathma Muthukottiappan
- Institute for Biochemistry and Molecular Biology, Medical Faculty, Rheinische Friedrich-Wilhelms-University of Bonn, 53115 Bonn, Germany
| | - Yanwei Su
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | - Christopher Schmied
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | - Silke Zillmann
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | - Iryna Nikonenko
- Department of Basic Neurosciences and the Center for Neuroscience, CMU, University of Geneva, 1211 Geneva 4, Switzerland
| | - Jochen Koddebusch
- Heidelberg University Biochemistry Center (BZH), Im Neuenheimer Feld 328, 69120 Heidelberg, Germany
| | - Gillian L Dornan
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | - Max T Lucht
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | - Vonda Koka
- Université Paris Cité, INSERM UMR-S1151, CNRS UMR-S8253, Institut Necker Enfants Malades, Paris, France
| | - Wonyul Jang
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | | | - Alexander Wallroth
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | - Martin Lehmann
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | - Britta Brügger
- Heidelberg University Biochemistry Center (BZH), Im Neuenheimer Feld 328, 69120 Heidelberg, Germany
| | - Mario Pende
- Université Paris Cité, INSERM UMR-S1151, CNRS UMR-S8253, Institut Necker Enfants Malades, Paris, France
| | - Dominic Winter
- Institute for Biochemistry and Molecular Biology, Medical Faculty, Rheinische Friedrich-Wilhelms-University of Bonn, 53115 Bonn, Germany
| | - Volker Haucke
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany; Department of Biology, Chemistry, Pharmacy, Freie Universität Berlin, 14195 Berlin, Germany; Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany.
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13
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Zhang W, Liu Z, Zhu J, Liu Z, Zhang Y, Qin G, Ren J, Qu X. Bioorthogonal Disruption of Pyroptosis Checkpoint for High-Efficiency Pyroptosis Cancer Therapy. J Am Chem Soc 2023. [PMID: 37486170 DOI: 10.1021/jacs.3c04180] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Pyroptosis is an inflammatory form of programmed cell death that holds great promise in cancer therapy. However, autophagy as the crucial pyroptosis checkpoint and the self-protective mechanism of cancer cells significantly weakens the therapeutic efficiency. Here, a bioorthogonal pyroptosis nanoregulator is constructed to induce pyroptosis and disrupt the checkpoint, enabling high-efficiency pyroptosis cancer therapy. The nanoregulator allows the in situ synthesis and accumulation of the photosensitizer PpIX in the mitochondria of cancer cells to directly produce mitochondrial ROS, thus triggering pyroptosis. Meanwhile, the in situ generated autophagy inhibitor via palladium-catalyzed bioorthogonal chemistry can disrupt the pyroptosis checkpoint to boost the pyroptosis efficacy. With the biomimetic cancer cell membrane coating, this platform for modulating pyroptosis presents specificity to cancer cells and poses no harm to normal tissue, resulting in a highly efficient and safe antitumor treatment. To our knowledge, this is the first report on a disrupting intrinsic protective mechanism of cancer cells for tumor pyroptosis therapy. This work highlights that autophagy as a checkpoint plays a key regulative role in pyroptosis therapy, which would motivate the future design of therapeutic regimens.
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Affiliation(s)
- Wenting Zhang
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zhengwei Liu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Jiawei Zhu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zhenqi Liu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Yu Zhang
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Geng Qin
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Jinsong Ren
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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14
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Hu X, Li Y, Chen Q, Wang T, Ma L, Zhang W, Yu R, Zhang J, Wan J, Yu C, Yuan Z. Sialic acids promote macrophage M1 polarization and atherosclerosis by upregulating ROS and autophagy blockage. Int Immunopharmacol 2023; 120:110410. [PMID: 37270929 DOI: 10.1016/j.intimp.2023.110410] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 05/10/2023] [Accepted: 05/28/2023] [Indexed: 06/06/2023]
Abstract
Accumulating evidence suggests that sialic acids is closely related to atherosclerosis. However, the effects and underlying mechanisms of sialic acids in atherosclerosis have been not defined. Macrophages are one of the most important cells during plaque progression. In this study, we investigated the role of sialic acids in the M1 macrophage polarization and pathogenesis of atherosclerosis. Here we found that sialic acids can promote the polarization of RAW264.7 cells to the M1 phenotype, thereby promoting the expression of proinflammatory cytokines in vitro. The proinflammatory effect of sialic acids may result from the inhibition of LKB1-AMPK-Sirt3 signaling pathway to upregulate intracellular ROS and impairing autophagy-lysosome system to block autophagic flux. In the APOE-/- mice, sialic acids in plasma increased during the development of atherosclerosis. Moreover, exogenous supplement of sialic acids can promote plaque progression in aortic arch and aortic sinus being accompanied by the differentiation of macrophages into M1 type in peripheral tissues. These studies demonstrated that sialic acids can promote macrophage polarization toward the M1 phenotype to accentuate atherosclerosis via inducing mitochondrial ROS and blocking autophagy, thus providing clue to a novel therapeutic strategy for atherosclerosis.
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Affiliation(s)
- Xuemei Hu
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Yueyue Li
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Qingyang Chen
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Tingting Wang
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Limei Ma
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Wanping Zhang
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Ruihong Yu
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Jun Zhang
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China; Institute of Life Sciences, Chongqing Medical University, Chongqing 400016, China
| | - Jingyuan Wan
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Chao Yu
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China.
| | - Zhiyi Yuan
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China.
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15
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Real-time visualization of lysosomal pH fluctuations in living cells with a ratiometric fluorescent probe. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Yang M, Tang B, Wang S, Tang L, Wen D, Vlodavsky I, Yang SM. Non-enzymatic heparanase enhances gastric tumor proliferation via TFEB-dependent autophagy. Oncogenesis 2022; 11:49. [PMID: 35970822 PMCID: PMC9378687 DOI: 10.1038/s41389-022-00424-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 07/27/2022] [Accepted: 08/03/2022] [Indexed: 11/08/2022] Open
Abstract
Heparanase (HPA) is the predominant enzyme that cleaves heparan sulfate and plays a critical role in a variety of pathophysiological processes. HPA activity has been traditionally correlated with tumor metastasis due to participation in the cleavage and remodeling of the extracellular matrix (ECM). Apart from its well-characterized catalytic properties, HPA was noticed to exert biological functions not rely on its enzymatic activity. This feature is supported by studies showing induction of signaling events, such as Src and AKT, by nonenzymatic HPA mutant. We provide evidence here that active HPA and inactive HPA mutant proteins enhance gastric cancer cell growth, possibly attributed to TFEB-mediated autophagy. Similarly, HPA gene silencing resulted in decreased gastric cancer cell proliferation and autophagy. Besides, TFEB inhibition reduced cell growth and autophagy induced by nonenzymatic HPA. Notably, HPA and TFEB were significantly elevated in gastric carcinomas compared with the adjacent gastric tissue. Moreover, the elevation of HPA gene expression and upregulation of TFEB levels have been associated with advanced clinical stage and poor prognosis of gastric cancer, providing strong clinical support for a connection between TFEB and HPA. Thus, neutralizing the nonenzymatic function of HPA and the related TFEB-driven autophagy may profoundly impact gastric cancer progression.
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Affiliation(s)
- Min Yang
- Department of Gastroenterology, Xinqiao Hospital, Army Medical University, 400037, Chongqing, China
| | - Bo Tang
- Department of Gastroenterology, Xinqiao Hospital, Army Medical University, 400037, Chongqing, China
| | - Sumin Wang
- Department of Gastroenterology, Xinqiao Hospital, Army Medical University, 400037, Chongqing, China
| | - Li Tang
- Department of Gastroenterology, Xinqiao Hospital, Army Medical University, 400037, Chongqing, China
| | - Dalin Wen
- Wound Trauma Medical Center, State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Army Medical University, 400042, Chongqing, China
| | - Israel Vlodavsky
- Cancer and Vascular Biology Research Center, the Bruce Rappaport Faculty of Medicine, Technion, Haifa, 31096, Israel.
| | - Shi-Ming Yang
- Department of Gastroenterology, Xinqiao Hospital, Army Medical University, 400037, Chongqing, China.
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17
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Lv C, Kang W, Liu S, Yang P, Nishina Y, Ge S, Bianco A, Ma B. Growth of ZIF-8 Nanoparticles In Situ on Graphene Oxide Nanosheets: A Multifunctional Nanoplatform for Combined Ion-Interference and Photothermal Therapy. ACS NANO 2022; 16:11428-11443. [PMID: 35816172 DOI: 10.1021/acsnano.2c05532] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The regulation of intracellular ions' overload to interrupt normal bioprocesses and cause cell death has been developed as an efficient strategy (named as ion-interference therapy/IIT) to treat cancer. In this study, we design a multifunctional nanoplatform (called BSArGO@ZIF-8 NSs) by in situ growth of metal organic framework nanoparticles (ZIF-8 NPs) onto the graphene oxide (GO) surface, subsequently reduced by ascorbic acid and modified by bovine serum albumin. This nanocomplex causes the intracellular overload of Zn2+, an increase of reactive oxygen species (ROS), and exerts a broad-spectrum lethality to different kinds of cancer cells. BSArGO@ZIF-8 NSs can promote cell apoptosis by initiating bim (a pro-apoptotic protein)-mediated mitochondrial apoptotic events, up-regulating PUMA/NOXA expression, and down-regulating the level of Bid/p53AIP1. Meanwhile, Zn2+ excess triggers cellular dysfunction and mitochondria damage by activating the autophagy signaling pathways and disturbing the intracellular environmental homeostasis. Combined with the photothermal effect of reduced GO (rGO), BSArGO@ZIF-8 NSs mediated ion-interference and photothermal combined therapy leads to effective apoptosis and inhibits cell proliferation and angiogenesis, bringing a higher efficacy in tumor suppression in vivo. This designed Zn-based multifunctional nanoplatform will allow promoting further the development of IIT and the corresponding combined cancer therapy strategy.
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Affiliation(s)
- Chunxu Lv
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China
| | - Wenyan Kang
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China
| | - Shuo Liu
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China
| | - Pishan Yang
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China
| | - Yuta Nishina
- Graduate School of Natural Science and Technology, Okayama University, Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
- Research Core for Interdisciplinary Sciences, Okayama University, Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
| | - Shaohua Ge
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China
| | - Alberto Bianco
- CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR3572, University of Strasbourg, ISIS, Strasbourg, 67000, France
| | - Baojin Ma
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China
- CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR3572, University of Strasbourg, ISIS, Strasbourg, 67000, France
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18
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Al-Bari AA. Inhibition of autolysosomes by repurposing drugs as a promising therapeutic strategy for the treatment of cancers. ALL LIFE 2022. [DOI: 10.1080/26895293.2022.2078894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Abdul Alim Al-Bari
- Department of Pharmacy, Faculty of Science, University of Rajshahi, Rajshahi, Bangladesh
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19
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Liu G, Sun BY, Sun J, Zhou PY, Guan RY, Zhou C, Yang ZF, Wang ZT, Zhou J, Fan J, Yi Y, Qiu SJ. BRG1 regulates lipid metabolism in hepatocellular carcinoma through the PIK3AP1/PI3K/AKT pathway by mediating GLMP expression. Dig Liver Dis 2022; 54:692-700. [PMID: 34158256 DOI: 10.1016/j.dld.2021.05.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 05/03/2021] [Accepted: 05/04/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND Brahma-related gene 1 (BRG1) is essential for embryogenesis and cellular metabolism. A deficiency of BRG1 in vivo decreases lipid droplets, but the molecular mechanism underlying its role in lipid metabolism associated with hepatocellular carcinoma (HCC) remains unknown. AIMS We aimed to determine the role of BRG1 in lipid metabolism in HCC. METHODS We assessed the differential expression of BRG1 in HCC and adjacent non-tumorous tissues using tissue microarrays. We stained lipid droplets in HCC cells with Bodipy fluorescence and Oil Red O, and verified BRG1 binding to the promoter region of glycosylated lysosomal membrane protein (GLMP) using chromatin immunoprecipitation. RESULTS The expression of GLMP, a potential lipid metabolism regulator, was suppressed by BRG1 via transcriptional activity. Knockdown of BRG1 decreased lipid droplets, increased GLMP expression and altered the phosphoinositide-3-kinase adaptor protein 1 (PIK3AP1)/phosphatidylinositol-3 kinase (PI3K)/protein kinase B (AKT) pathway in HCC, which further GLMP knockdown partially restored. Thus, GLMP knockdown increased lipid droplets and differentially altered the PI3K/AKT pathway. CONCLUSIONS Downregulating BRG1 decreased lipid droplet deposition in HCC cells by upregulating GLMP and altering the PI3K/AKT pathway. Both BRG1 and GLMP might serve as therapeutic targets for disorders associated with dysregulated lipid metabolism, such as NAFLD and NAFLD-associated HCC.
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Affiliation(s)
- Gao Liu
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Biomedical Research Center, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, People's Republic of China
| | - Bao-Ye Sun
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Biomedical Research Center, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, People's Republic of China
| | - Jian Sun
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Biomedical Research Center, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, People's Republic of China
| | - Pei-Yun Zhou
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Biomedical Research Center, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, People's Republic of China
| | - Ruo-Yu Guan
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Biomedical Research Center, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, People's Republic of China
| | - Cheng Zhou
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Biomedical Research Center, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, People's Republic of China
| | - Zhang-Fu Yang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Biomedical Research Center, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, People's Republic of China
| | - Zhu-Tao Wang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Biomedical Research Center, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, People's Republic of China
| | - Jian Zhou
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Biomedical Research Center, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, People's Republic of China
| | - Jia Fan
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Biomedical Research Center, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, People's Republic of China
| | - Yong Yi
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Biomedical Research Center, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, People's Republic of China.
| | - Shuang-Jian Qiu
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Biomedical Research Center, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, People's Republic of China.
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20
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Malek M, Wawrzyniak AM, Ebner M, Puchkov D, Haucke V. Inositol triphosphate-triggered calcium release from the endoplasmic reticulum induces lysosome biogenesis via TFEB/TFE3. J Biol Chem 2022; 298:101740. [PMID: 35182526 PMCID: PMC8914386 DOI: 10.1016/j.jbc.2022.101740] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 02/02/2022] [Accepted: 02/08/2022] [Indexed: 12/14/2022] Open
Abstract
Lysosomes serve as dynamic regulators of cell and organismal physiology by integrating the degradation of macromolecules with receptor and nutrient signaling. Previous studies have established that activation of the transcription factor EB (TFEB) and transcription factor E3 (TFE3) induces the expression of lysosomal genes and proteins in signaling-inactive starved cells, that is, under conditions when activity of the master regulator of nutrient-sensing signaling mechanistic target of rapamycin complex 1 is repressed. How lysosome biogenesis is triggered in signaling-active cells is incompletely understood. Here, we identify a role for calcium release from the lumen of the endoplasmic reticulum in the control of lysosome biogenesis that is independent of mechanistic target of rapamycin complex 1. We show using functional imaging that calcium efflux from endoplasmic reticulum stores induced by inositol triphosphate accumulation upon depletion of inositol polyphosphate-5-phosphatase A, an inositol 5-phosphatase downregulated in cancer and defective in spinocerebellar ataxia, or receptor-mediated phospholipase C activation leads to the induction of lysosome biogenesis. This mechanism involves calcineurin and the nuclear translocation and elevated transcriptional activity of TFEB/TFE3. Our findings reveal a crucial function for inositol polyphosphate-5-phosphatase A–mediated triphosphate hydrolysis in the control of lysosome biogenesis via TFEB/TFE3, thereby contributing to our understanding how cells are able to maintain their lysosome content under conditions of active receptor and nutrient signaling.
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Affiliation(s)
- Mouhannad Malek
- Department of Molecular Pharmacology & Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Berlin, Germany
| | - Anna M Wawrzyniak
- Department of Molecular Pharmacology & Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Berlin, Germany
| | - Michael Ebner
- Department of Molecular Pharmacology & Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Berlin, Germany
| | - Dmytro Puchkov
- Department of Molecular Pharmacology & Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Berlin, Germany
| | - Volker Haucke
- Department of Molecular Pharmacology & Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Berlin, Germany; Faculty of Biology, Chemistry and Pharmacy, Freie Universität Berlin, Berlin, Germany.
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21
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López-Hernández T, Takenaka KI, Mori Y, Kongpracha P, Nagamori S, Haucke V, Takamori S. Clathrin-independent endocytic retrieval of SV proteins mediated by the clathrin adaptor AP-2 at mammalian central synapses. eLife 2022; 11:e71198. [PMID: 35014951 PMCID: PMC8752090 DOI: 10.7554/elife.71198] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 12/28/2021] [Indexed: 12/25/2022] Open
Abstract
Neurotransmission is based on the exocytic fusion of synaptic vesicles (SVs) followed by endocytic membrane retrieval and the reformation of SVs. Conflicting models have been proposed regarding the mechanisms of SV endocytosis, most notably clathrin/adaptor protein complex 2 (AP-2)-mediated endocytosis and clathrin-independent ultrafast endocytosis. Partitioning between these pathways has been suggested to be controlled by temperature and stimulus paradigm. We report on the comprehensive survey of six major SV proteins to show that SV endocytosis in mouse hippocampal neurons at physiological temperature occurs independent of clathrin while the endocytic retrieval of a subset of SV proteins including the vesicular transporters for glutamate and GABA depend on sorting by the clathrin adaptor AP-2. Our findings highlight a clathrin-independent role of the clathrin adaptor AP-2 in the endocytic retrieval of select SV cargos from the presynaptic cell surface and suggest a revised model for the endocytosis of SV membranes at mammalian central synapses.
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Affiliation(s)
| | - Koh-ichiro Takenaka
- Laboratory of Neural Membrane Biology, Graduate School of Brain Science, Doshisha UniversityKyotoJapan
| | - Yasunori Mori
- Laboratory of Neural Membrane Biology, Graduate School of Brain Science, Doshisha UniversityKyotoJapan
| | - Pornparn Kongpracha
- Department of Laboratory Medicine, The Jikei University School of MedicineTokyoJapan
| | - Shushi Nagamori
- Department of Laboratory Medicine, The Jikei University School of MedicineTokyoJapan
| | - Volker Haucke
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)BerlinGermany
| | - Shigeo Takamori
- Laboratory of Neural Membrane Biology, Graduate School of Brain Science, Doshisha UniversityKyotoJapan
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22
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Malek M, Haucke V. Inositol triphosphate signaling triggers lysosome biogenesis via calcium release from endoplasmic reticulum stores. CONTACT (THOUSAND OAKS (VENTURA COUNTY, CALIF.)) 2022; 5:251525642210970. [PMID: 35757017 PMCID: PMC7612895 DOI: 10.1177/25152564221097052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Lysosomes serve as cellular degradation and signaling centers that coordinate the turnover of macromolecules with cell metabolism. The adaptation of cellular lysosome content and activity via the induction of lysosome biogenesis is therefore key to cell physiology and to counteract disease. Previous work has established a pathway for the induction of lysosome biogenesis in signaling-inactive starved cells that is based on the repression of mTORC1-mediated nutrient signaling. How lysosomal biogenesis is facilitated in signaling-active fed cells is poorly understood. A recent study by Malek et al (Malek et al, 2022) partially fills this gap by unraveling a nutrient signaling-independent pathway for lysosome biogenesis that operates in signaling-active cells. This pathway involves the receptor-mediated activation of phospholipase C, inositol (1,4,5)-triphosphate (IP3)-triggered release of calcium ions from endoplasmic reticulum stores, and the calcineurin-induced activation of transcription factor EB (TFEB) and its relative TFE3 to induce lysosomal gene expression independent of calcium in the lysosome lumen. These findings contribute to our understanding of how lysosome biogenesis and function are controlled in response to environmental changes and cell signaling and may conceivably be of relevance for our understanding and the treatment of lysosome-related diseases as well as for aging and neurodegeneration.
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Affiliation(s)
- Mouhannad Malek
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Department of Molecular Pharmacology & Cell Biology, 13125 Berlin, Germany
| | - Volker Haucke
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Department of Molecular Pharmacology & Cell Biology, 13125 Berlin, Germany
- Freie Universität Berlin, Faculty of Biology, Chemistry and Pharmacy, 14195 Berlin, Germany
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23
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Bardestani A, Ebrahimpour S, Esmaeili A, Esmaeili A. Quercetin attenuates neurotoxicity induced by iron oxide nanoparticles. J Nanobiotechnology 2021; 19:327. [PMID: 34663344 PMCID: PMC8522232 DOI: 10.1186/s12951-021-01059-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 09/24/2021] [Indexed: 01/19/2023] Open
Abstract
Iron oxide nanoparticles (IONPs) have been proposed as targeted carriers to deliver therapeutic molecules in the central nervous system (CNS). However, IONPs may damage neural tissue via free iron accumulation, protein aggregation, and oxidative stress. Neuroprotective effects of quercetin (QC) have been proven due to its antioxidant and anti-inflammatory properties. However, poor solubility and low bioavailability of QC have also led researchers to make various QC-involved nanoparticles to overcome these limitations. We wondered how high doses or prolonged treatment with quercetin conjugated superparamagnetic iron oxide nanoparticles (QCSPIONs) could improve cognitive dysfunction and promote neurogenesis without any toxicity. It can be explained that the QC inhibits protein aggregation and acts against iron overload via iron-chelating activity, iron homeostasis genes regulation, radical scavenging, and attenuation of Fenton/Haber-Weiss reaction. In this review, first, we present brain iron homeostasis, molecular mechanisms of iron overload that induced neurotoxicity, and the role of iron in dementia-associated diseases. Then by providing evidence of IONPs neurotoxicity, we discuss how QC neutralizes IONPs neurotoxicity, and finally, we make a brief comparison between QC and conventional iron chelators. In this review, we highlight that QC as supplementation and especially in conjugated form reduces iron oxide nanoparticles neurotoxicity in clinical application.
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Affiliation(s)
- Akram Bardestani
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, P.O. Box: 8174673441, Isfahan, Iran
| | - Shiva Ebrahimpour
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, P.O. Box: 8174673441, Isfahan, Iran
| | - Ali Esmaeili
- School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Abolghasem Esmaeili
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, P.O. Box: 8174673441, Isfahan, Iran.
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24
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Zhang C, van Leeuwen W, Blotenburg M, Aguilera-Gomez A, Brussee S, Grond R, Kampinga HH, Rabouille C. Activation of salt Inducible Kinases, IRE1 and PERK leads to Sec bodies formation in Drosophila S2 cells. J Cell Sci 2021; 134:272062. [PMID: 34350957 PMCID: PMC8445602 DOI: 10.1242/jcs.258685] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 07/21/2021] [Indexed: 11/20/2022] Open
Abstract
The phase separation of the non-membrane bound Sec bodies occurs in Drosophila S2 cells by coalescence of components of the endoplasmic reticulum (ER) exit sites under the stress of amino acid starvation. Here, we address which signaling pathways cause Sec body formation and find that two pathways are critical. The first is the activation of the salt-inducible kinases (SIKs; SIK2 and SIK3) by Na+ stress, which, when it is strong, is sufficient. The second is activation of IRE1 and PERK (also known as PEK in flies) downstream of ER stress induced by the absence of amino acids, which needs to be combined with moderate salt stress to induce Sec body formation. SIK, and IRE1 and PERK activation appear to potentiate each other through the stimulation of the unfolded protein response, a key parameter in Sec body formation. This work shows the role of SIKs in phase transition and re-enforces the role of IRE1 and PERK as a metabolic sensor for the level of circulating amino acids and salt. This article has an associated First Person interview with the first author of the paper. Summary: In S2 cells, the phase-separated Sec bodies form upon the combined activation of salt-inducible kinases, IRE1 and PERK.
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Affiliation(s)
- Chujun Zhang
- Hubrecht Institute of the KNAW & UMC Utrecht, Utrecht, The Netherlands
| | | | | | | | - Sem Brussee
- Hubrecht Institute of the KNAW & UMC Utrecht, Utrecht, The Netherlands
| | - Rianne Grond
- Hubrecht Institute of the KNAW & UMC Utrecht, Utrecht, The Netherlands
| | - Harm H Kampinga
- Department of Biomedical Sciences in Cells and Systems, UMC Groningen, The Netherlands
| | - Catherine Rabouille
- Hubrecht Institute of the KNAW & UMC Utrecht, Utrecht, The Netherlands.,Department of Biomedical Sciences in Cells and Systems, UMC Groningen, The Netherlands.,Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, The Netherlands
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25
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Yin Y, Jiang T, Hao Y, Zhang J, Li W, Hao Y, He W, Song Y, Feng Q, Ma W. Cascade catalytic nanoplatform based on ions interference strategy for calcium overload therapy and ferroptosis. Int J Pharm 2021; 606:120937. [PMID: 34310960 DOI: 10.1016/j.ijpharm.2021.120937] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/19/2021] [Accepted: 07/21/2021] [Indexed: 01/01/2023]
Abstract
Intracellular ions played prominent part in cell function and behavior. Disrupting intracellular ions homeostasis might switch ions signal from "regulating" to "destroying". Inspired by this, we introduced the ions interference strategy for tumor therapy. Herein, curcumin (CUR) and transferrin (Tf) co-loaded calcium peroxide nanoparticles (CaO2 NPs) were formulated. With tumor targeting ability, CaO2/Tf/CUR pinpointed tumor cells and then instantaneously decomposed in acidic lysosomes, concurrently accompanying with the release of Ca2+ and CUR, as well as the production of H2O2. Then H2O2 not only damaged structure of Tf to release Fe3+, but also was converted to hydroxyl radicals via ferric ions mediated Fenton reaction for ferroptosis. In addition, the released Ca2+ and CUR induced Ca2+ overload via exogenous and endogenous calcium ions accumulation, respectively, further activating mitochondria apoptosis signaling pathway for cell injury. Therefore, based on calcium and ferric ions interference strategy, the cascade catalytic CaO2/Tf/CUR offered synergistic combination of ferroptosis, Ca2+ overload therapy and chemotherapy, which held a great promise in cancer treatment.
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Affiliation(s)
- Yanyan Yin
- College of Pharmacy, Xinxiang Medical University, Xinxiang 453003, China
| | - Tianyao Jiang
- College of Pharmacy, Xinxiang Medical University, Xinxiang 453003, China
| | - Yutong Hao
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Ji Zhang
- College of Pharmacy, Xinxiang Medical University, Xinxiang 453003, China
| | - Wen Li
- College of Pharmacy, Xinxiang Medical University, Xinxiang 453003, China
| | - Yongwei Hao
- School of Life Sciences and Technology, Xinxiang Medical University, Xinxiang 453003, China
| | - Wei He
- College of Pharmacy, Xinxiang Medical University, Xinxiang 453003, China
| | - Yu Song
- College of Pharmacy, Xinxiang Medical University, Xinxiang 453003, China
| | - Qianhua Feng
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China.
| | - Weiwei Ma
- College of Pharmacy, Xinxiang Medical University, Xinxiang 453003, China.
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26
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Galenkamp KMO, Commisso C. The Golgi as a "Proton Sink" in Cancer. Front Cell Dev Biol 2021; 9:664295. [PMID: 34055797 PMCID: PMC8155353 DOI: 10.3389/fcell.2021.664295] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/21/2021] [Indexed: 12/19/2022] Open
Abstract
Cancer cells exhibit increased glycolytic flux and adenosine triphosphate (ATP) hydrolysis. These processes increase the acidic burden on the cells through the production of lactate and protons. Nonetheless, cancer cells can maintain an alkaline intracellular pH (pHi) relative to untransformed cells, which sets the stage for optimal functioning of glycolytic enzymes, evasion of cell death, and increased proliferation and motility. Upregulation of plasma membrane transporters allows for H+ and lactate efflux; however, recent evidence suggests that the acidification of organelles can contribute to maintenance of an alkaline cytosol in cancer cells by siphoning off protons, thereby supporting tumor growth. The Golgi is such an acidic organelle, with resting pH ranging from 6.0 to 6.7. Here, we posit that the Golgi represents a "proton sink" in cancer and delineate the proton channels involved in Golgi acidification and the ion channels that influence this process. Furthermore, we discuss ion channel regulators that can affect Golgi pH and Golgi-dependent processes that may contribute to pHi homeostasis in cancer.
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Affiliation(s)
- Koen M. O. Galenkamp
- Cell and Molecular Biology of Cancer Program, NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States
| | - Cosimo Commisso
- Cell and Molecular Biology of Cancer Program, NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States
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27
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Yang C, Wang X. Lysosome biogenesis: Regulation and functions. J Cell Biol 2021; 220:212053. [PMID: 33950241 PMCID: PMC8105738 DOI: 10.1083/jcb.202102001] [Citation(s) in RCA: 158] [Impact Index Per Article: 52.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/15/2021] [Accepted: 04/19/2021] [Indexed: 02/07/2023] Open
Abstract
Lysosomes are degradation centers and signaling hubs in cells and play important roles in cellular homeostasis, development, and aging. Changes in lysosome function are essential to support cellular adaptation to multiple signals and stimuli. Therefore, lysosome biogenesis and activity are regulated by a wide variety of intra- and extracellular cues. Here, we summarize current knowledge of the regulatory mechanisms of lysosome biogenesis, including synthesis of lysosomal proteins and their delivery via the endosome-lysosome pathway, reformation of lysosomes from degradative vesicles, and transcriptional regulation of lysosomal genes. We survey the regulation of lysosome biogenesis in response to nutrient and nonnutrient signals, the cell cycle, stem cell quiescence, and cell fate determination. Finally, we discuss lysosome biogenesis and functions in the context of organismal development and aging.
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Affiliation(s)
- Chonglin Yang
- State Key Laboratory of Conservation and Utilization of Bio-Resources in Yunnan, and Center for Life Science, School of Life Sciences, Yunnan University, Kunming, China
| | - Xiaochen Wang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
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28
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Zhang Y, Feng X, Jia X, Zhao J, Hao Y, Wang H, Chen R, Wang S, Du S, Feng Q, Zhang X. Biomimetic Ca 2+ nanogenerator based on ions interference strategy for tumour-specific therapy. J Drug Target 2021; 29:1094-1101. [PMID: 33896301 DOI: 10.1080/1061186x.2021.1919123] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Intracellular Ca2+ ions as second messenger played key role in cell behaviour, which was often overlooked in traditional antitumor treatment. Disrupting Ca2+ ion homeostasis by Ca2+ overload might switch ions signal from 'regulating' to 'destroying'. Inspired by this, a biomimetic Ca2+ nanogenerator was constructed. Briefly, the curcumin (CUR) was loaded into mesoporous calcium carbonate nanoparticles (MCC NPs), and then coated with platelet (PLT) membrane. Upon reaching tumour cells by PLT membrane-mediated tumour targeting effect, PLT@MCC/CUR would instantaneously decompose in acidic lysosomes, concurrently accompanying with Ca2+ generation and CUR release. The CUR could further facilitate Ca2+ release from endoplasmic reticulum (ER) and inhibit Ca2+ efflux, aggravating Ca2+ overload to disrupt mitochondrial Ca2+ homeostasis for mitochondria apoptosis signalling pathway activation. Interestingly, such effect was ineffective in normal cells, realising the tumour-specific therapeutic therapy. Based on ions interference strategy, PLT@MCC/CUR herein offered synergistic combination of Ca2+ overload therapy and chemotherapy, which would pave the way towards more effective nanotherapeutics.
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Affiliation(s)
- Yingjie Zhang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, PR China
| | - Xuebing Feng
- School of Stomatology, Shandong University, Jinan, PR China
| | - Xuedong Jia
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, PR China
| | - Junjie Zhao
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, PR China
| | - Yutong Hao
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, PR China
| | - Hao Wang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, PR China
| | - Rao Chen
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, PR China
| | - Song Wang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, PR China
| | - Shuzhang Du
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, PR China
| | - Qianhua Feng
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, PR China
| | - Xiaojian Zhang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, PR China
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29
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Fang R, Wang X, Xia Q, Zhao M, Zhang H, Wang X, Ye S, Cheng K, Liang Y, Cheng Y, Gu Y, Rao Q. Nuclear translocation of ASPL-TFE3 fusion protein creates favorable metabolism by mediating autophagy in translocation renal cell carcinoma. Oncogene 2021; 40:3303-3317. [PMID: 33846569 DOI: 10.1038/s41388-021-01776-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 03/10/2021] [Accepted: 03/29/2021] [Indexed: 02/01/2023]
Abstract
The ASPL-TFE3 fusion gene, resulting from t(X;17)(p11.2;q25.3), is one of the most commonly identified fusion genes in Xp11 translocation renal cell carcinoma (tRCC). However, its roles and underlying mechanism in RCC development are not yet clear. Here, we identified ASPL-TFE3 fusion as the most common tRCC subtype in a Chinese population (29/126, 23.03%). This fusion protein translocated into the nucleus and promoted RCC cell proliferation both in vitro and in vivo. Mechanistically, the fusion protein transcriptionally activated the lysosome-autophagy pathway by binding to the promoters of lysosome-related genes. Autophagy, activated by ASPL-TFE3, enabled RCC cells to escape energy stress by promoting the utilization of proteins and lipids. Moreover, we found that the ASPL-TFE3 fusion escaped regulation by the classic mTOR-TFE3 signal and instead activated phospho-mTOR and its downstream targets. Finally, targeting both autophagy and the mTOR axis resulted in a greater antiproliferative effect than single pathway inhibition. In summary, these results confirmed the ASPL-TFE3 fusion as a master regulator of metabolic adaptation mediated by autophagy in tRCC. The simultaneous manipulation of autophagy and the mTOR axis may represent a novel treatment strategy for ASPL-TFE3 fusion RCC.
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Affiliation(s)
- Ru Fang
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, China
| | - Xiaotong Wang
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, China
| | - Qiuyuan Xia
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, China
| | - Ming Zhao
- Department of Pathology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Hao Zhang
- Department of Nephrology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xuan Wang
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, China
| | - Shengbing Ye
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, China
| | - Kai Cheng
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, China
| | - Yan Liang
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, China
| | - Yang Cheng
- Health Management Center, Geriatric Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.
| | - Yayun Gu
- State Key Laboratory of Reproductive Medicine, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China.
| | - Qiu Rao
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, China.
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30
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Camblor-Perujo S, Kononenko NL. Brain-specific functions of the endocytic machinery. FEBS J 2021; 289:2219-2246. [PMID: 33896112 DOI: 10.1111/febs.15897] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 03/29/2021] [Indexed: 12/12/2022]
Abstract
Endocytosis is an essential cellular process required for multiple physiological functions, including communication with the extracellular environment, nutrient uptake, and signaling by the cell surface receptors. In a broad sense, endocytosis is accomplished through either constitutive or ligand-induced invagination of the plasma membrane, which results in the formation of the plasma membrane-retrieved endocytic vesicles, which can either be sent for degradation to the lysosomes or recycled back to the PM. This additional function of endocytosis in membrane retrieval has been adopted by excitable cells, such as neurons, for membrane equilibrium maintenance at synapses. The last two decades were especially productive with respect to the identification of brain-specific functions of the endocytic machinery, which additionally include but not limited to regulation of neuronal differentiation and migration, maintenance of neuron morphology and synaptic plasticity, and prevention of neurotoxic aggregates spreading. In this review, we highlight the current knowledge of brain-specific functions of endocytic machinery with a specific focus on three brain cell types, neuronal progenitor cells, neurons, and glial cells.
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Affiliation(s)
| | - Natalia L Kononenko
- CECAD Cluster of Excellence, University of Cologne, Germany.,Center for Physiology & Pathophysiology, Medical Faculty, University of Cologne, Germany
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Phuyal S, Baschieri F. Endomembranes: Unsung Heroes of Mechanobiology? Front Bioeng Biotechnol 2020; 8:597721. [PMID: 33195167 PMCID: PMC7642594 DOI: 10.3389/fbioe.2020.597721] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 10/05/2020] [Indexed: 12/18/2022] Open
Abstract
Mechanical stimuli have profound effects on the cellular architecture and functions. Over the past two decades, considerable progress has been made in unraveling the molecular machineries that confer cells the ability to sense and transduce mechanical input into biochemical signals. This has resulted in the identification of several force-sensing proteins or mechanically activated ion channels distributed throughout most cell types, whereby the plasma membrane, cytoskeleton, and the nucleus have garnered much attention. Although organelles from the endomembrane system make up significant portion of cell volume and play pivotal roles in the spatiotemporal distribution of signaling molecules, they have received surprisingly little attention in mechanobiology. In this mini-review, we summarize results that document participation of the endomembrane system in sensing and responding to mechanical cues.
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Affiliation(s)
- Santosh Phuyal
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - Francesco Baschieri
- Inserm U1279, Gustave Roussy Institute, Université Paris-Saclay, Villejuif, France
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López-Hernández T, Haucke V, Maritzen T. Endocytosis in the adaptation to cellular stress. Cell Stress 2020; 4:230-247. [PMID: 33024932 PMCID: PMC7520666 DOI: 10.15698/cst2020.10.232] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 07/24/2020] [Accepted: 07/29/2020] [Indexed: 12/11/2022] Open
Abstract
Cellular life is challenged by a multitude of stress conditions, triggered for example by alterations in osmolarity, oxygen or nutrient supply. Hence, cells have developed sophisticated stress responses to cope with these challenges. Some of these stress programs such as the heat shock response are understood in great detail, while other aspects remain largely elusive including potential stress-dependent adaptations of the plasma membrane proteome. The plasma membrane is not only the first point of encounter for many types of environmental stress, but given the diversity of receptor proteins and their associated molecules also represents the site at which many cellular signal cascades originate. Since these signaling pathways affect virtually all aspects of cellular life, changes in the plasma membrane proteome appear ideally suited to contribute to the cellular adaptation to stress. The most rapid means to alter the cell surface proteome in response to stress is by alterations in endocytosis. Changes in the overall endocytic flux or in the endocytic regulation of select proteins conceivably can help to counteract adverse environmental conditions. In this review we summarize recent data regarding stress-induced changes in endocytosis and discuss how these changes might contribute to the cellular adaptation to stress in different systems. Future studies will be needed to uncover the underlying mechanisms in detail and to arrive at a coherent picture.
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Affiliation(s)
- Tania López-Hernández
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | - Volker Haucke
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
- Freie Universität Berlin, Faculty of Biology, Chemistry, Pharmacy, 14195 Berlin, Germany
| | - Tanja Maritzen
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
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López-Hernández T, Maritzen T, Haucke V. Ramping up the autophagy-lysosome system to cope with osmotic stress. Autophagy 2020; 16:1921-1922. [PMID: 32684085 DOI: 10.1080/15548627.2020.1798065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Osmotic stress is a critical challenge for mammalian cells as loss of water triggered by a hyperosmotic environment promotes harmful protein aggregation and impairs cell survival. How the degradative capacity of cells, in particular the macroautophagy/autophagy-lysosome system, is adapted to meet the proteolytic demands induced by osmotic challenge remains poorly understood. We have identified a hitherto unknown pathway that is activated by hyperosmotic stress and serves to link alterations in cellular ion homeostasis to the induction of autophagy and lysosomal gene expression and, thereby, to lysosome biogenesis.
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Affiliation(s)
- Tania López-Hernández
- Molecular Pharmacology and Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) , Berlin, Germany
| | - Tanja Maritzen
- Molecular Pharmacology and Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) , Berlin, Germany
| | - Volker Haucke
- Molecular Pharmacology and Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) , Berlin, Germany.,Faculty of Biology, Chemistry, Pharmacy, Freie Universität Berlin , Berlin, Germany.,NeuroCure Cluster of Excellence, Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt- Universität zu Berlin , Berlin, Germany
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