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Tey PY, Dufner A, Knobeloch KP, Pruneda JN, Clague MJ, Urbé S. Rapid turnover of CTLA4 is associated with a complex architecture of reversible ubiquitylation. J Cell Biol 2025; 224:e202312141. [PMID: 39404738 PMCID: PMC11486831 DOI: 10.1083/jcb.202312141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 08/14/2024] [Accepted: 09/27/2024] [Indexed: 10/20/2024] Open
Abstract
The immune checkpoint regulator CTLA4 is an unusually short-lived membrane protein. Here, we show that its lysosomal degradation is dependent on ubiquitylation at lysine residues 203 and 213. Inhibition of the v-ATPase partially restores CTLA4 levels following cycloheximide treatment, but also reveals a fraction that is secreted in exosomes. The endosomal deubiquitylase, USP8, interacts with CTLA4, and its loss enhances CTLA4 ubiquitylation in cancer cells, mouse CD4+ T cells, and cancer cell-derived exosomes. Depletion of the USP8 adapter protein, HD-PTP, but not ESCRT-0 recapitulates this cellular phenotype but shows distinct properties vis-à-vis exosome incorporation. Re-expression of wild-type USP8, but neither a catalytically inactive nor a localization-compromised ΔMIT domain mutant can rescue delayed degradation of CTLA4 or counteract its accumulation in clustered endosomes. UbiCRest analysis of CTLA4-associated ubiquitin chain linkages identifies a complex mixture of conventional Lys63- and more unusual Lys27- and Lys29-linked polyubiquitin chains that may underly the rapidity of protein turnover.
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Affiliation(s)
- Pei Yee Tey
- Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Almut Dufner
- Institute of Neuropathology, Medical Faculty, University of Freiburg, Freiburg, Germany
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
| | - Klaus-Peter Knobeloch
- Institute of Neuropathology, Medical Faculty, University of Freiburg, Freiburg, Germany
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
| | - Jonathan N. Pruneda
- Department of Molecular Microbiology & Immunology, Oregon Health & Science University, Portland, USA
| | - Michael J. Clague
- Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Sylvie Urbé
- Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
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2
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Moalem Y, Katz R, Subramaniam AG, Malis Y, Yaffe Y, Borenstein-Auerbach N, Tadmor K, Raved R, Maoz BM, Yoo JS, Lustig Y, Luxenburg C, Perlson E, Einav S, Sklan EH. Numb-associated kinases regulate sandfly-borne Toscana virus entry. Emerg Microbes Infect 2024; 13:2382237. [PMID: 39017647 PMCID: PMC11285224 DOI: 10.1080/22221751.2024.2382237] [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: 01/24/2024] [Revised: 07/08/2024] [Accepted: 07/16/2024] [Indexed: 07/18/2024]
Abstract
Sandfly-borne Toscana virus (TOSV) is an enveloped tri-segmented negative single-strand RNA Phlebovirus. It is an emerging virus predominantly endemic in southwestern Europe and Northern Africa. Although TOSV infection is typically asymptomatic or results in mild febrile disease, it is neurovirulent and ranks among the three most common causes of summer meningitis in certain regions. Despite this clinical significance, our understanding of the molecular aspects and host factors regulating phlebovirus infection is limited. This study characterized the early steps of TOSV infection. Our findings reveal that two members of the Numb-associated kinases family of Ser/Thr kinases, namely adaptor-associated kinase 1 (AAK1) and cyclin G-associated kinase (GAK), play a role in regulating the early stages of TOSV entry. FDA-approved inhibitors targeting these kinases demonstrated significant inhibition of TOSV infection. This study suggests that AAK1 and GAK represent druggable targets for inhibiting TOSV infection and, potentially, related Phleboviruses.
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Affiliation(s)
- Yarden Moalem
- Department of Clinical Microbiology and Immunology, Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Rodolfo Katz
- Department of Clinical Microbiology and Immunology, Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Anand G. Subramaniam
- Department of Physiology and Pharmacology, Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Yehonathan Malis
- Department of Pathology, Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Yakey Yaffe
- The Drimmer-Fischler Family Stem Cell Core Laboratory for Regenerative Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Nofit Borenstein-Auerbach
- Department of Cell and Developmental Biology, Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Keshet Tadmor
- Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
| | - Roey Raved
- School of Neurobiology, Biochemistry and Biophysics, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Ben M. Maoz
- The Drimmer-Fischler Family Stem Cell Core Laboratory for Regenerative Medicine, Tel Aviv University, Tel Aviv, Israel
- Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
- Department of Biomedical Engineering, Tel Aviv University, Tel Aviv, Israel
| | - Ji Seung Yoo
- School of Life Sciences, BK21 FOUR KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea
| | - Yaniv Lustig
- Central Virology Laboratory, Ministry of Health, Chaim Sheba Medical Center, Tel Hashomer, Israel
- School of Public Health, School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Chen Luxenburg
- Department of Cell and Developmental Biology, Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Eran Perlson
- Department of Physiology and Pharmacology, Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Shirit Einav
- Department of Medicine, Division of Infectious Diseases and Geographic Medicine, Stanford University, Stanford, CA, USA
- Department of Microbiology and Immunology, Stanford University, Stanford, CA, USA
- Chan Zuckerberg Biohub, San Francisco, CA, USA
| | - Ella H. Sklan
- Department of Clinical Microbiology and Immunology, Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv, Israel
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3
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Clarke DN, Kane A, Perillo M, Lowe CJ, Swartz SZ. VitelloTag: a tool for high-throughput cargo delivery into oocytes. Development 2024; 151:dev202857. [PMID: 39171380 PMCID: PMC11423919 DOI: 10.1242/dev.202857] [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: 03/05/2024] [Accepted: 08/15/2024] [Indexed: 08/23/2024]
Abstract
Delivering molecular tools into oocytes is essential for developmental and reproductive biology. Microinjection, the conventional method, is equipment intensive, often technically challenging and has a low yield, and is impractical in species with delicate oocytes or restricted spawning seasons. To overcome these limitations, we developed VitelloTag, a cost-effective, high-throughput system using vitellogenin-derived fusion proteins to enable efficient cargo delivery via receptor-mediated endocytosis. We demonstrate its utility by delivering Cas9/sgRNA complexes in two distantly related species for gene knockout.
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Affiliation(s)
- D Nathaniel Clarke
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02142,USA
| | - Akshay Kane
- The Eugene Bell Center for Regenerative Biology and Tissue Engineering, Marine Biological Laboratory, 7 MBL Street, Woods Hole, MA 02543-1015, USA
| | - Margherita Perillo
- The Eugene Bell Center for Regenerative Biology and Tissue Engineering, Marine Biological Laboratory, 7 MBL Street, Woods Hole, MA 02543-1015, USA
| | - Christopher J Lowe
- Hopkins Marine Station, Stanford University, Pacific Grove, CA 93950,USA
| | - S Zachary Swartz
- The Eugene Bell Center for Regenerative Biology and Tissue Engineering, Marine Biological Laboratory, 7 MBL Street, Woods Hole, MA 02543-1015, USA
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4
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Tijoriwalla S, Liyanage T, Herath TUB, Lee N, Rehman A, Gianfelice A, Ireton K. The host GTPase Dynamin 2 modulates apical junction structure to control cell-to-cell spread of Listeria monocytogenes. Infect Immun 2024; 92:e0013624. [PMID: 39133017 PMCID: PMC11475654 DOI: 10.1128/iai.00136-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Accepted: 07/16/2024] [Indexed: 08/13/2024] Open
Abstract
The food-borne pathogen Listeria monocytogenes uses actin-based motility to generate plasma membrane protrusions that mediate the spread of bacteria between host cells. In polarized epithelial cells, efficient protrusion formation by L. monocytogenes requires the secreted bacterial protein InlC, which binds to a carboxyl-terminal Src homology 3 (SH3) domain in the human scaffolding protein Tuba. This interaction antagonizes Tuba, thereby diminishing cortical tension at the apical junctional complex and enhancing L. monocytogenes protrusion formation and spread. Tuba contains five SH3 domains apart from the domain that interacts with InlC. Here, we show that human GTPase Dynamin 2 associates with two SH3 domains in the amino-terminus of Tuba and acts together with this scaffolding protein to control the spread of L. monocytogenes. Genetic or pharmacological inhibition of Dynamin 2 or knockdown of Tuba each restored normal protrusion formation and spread to a bacterial strain deleted for the inlC gene (∆inlC). Dynamin 2 localized to apical junctions in uninfected human cells and protrusions in cells infected with L. monocytogenes. Localization of Dynamin 2 to junctions and protrusions depended on Tuba. Knockdown of Dynamin 2 or Tuba diminished junctional linearity, indicating a role for these proteins in controlling cortical tension. Infection with L. monocytogenes induced InlC-dependent displacement of Dynamin 2 from junctions, suggesting a possible mechanism of antagonism of this GTPase. Collectively, our results show that Dynamin 2 cooperates with Tuba to promote intercellular tension that restricts the spread of ∆inlC Listeria. By expressing InlC, wild-type L. monocytogenes overcomes this restriction.
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Affiliation(s)
- Serena Tijoriwalla
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Thiloma Liyanage
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Thilina U. B. Herath
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Nicole Lee
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Attika Rehman
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Antonella Gianfelice
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Keith Ireton
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
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5
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Lee HJ, Fenollar-Ferrer C, Isgrig K, Wang YX, Valente K, Eide J, Honda K, Chien WW, Petralia RS, Dong L, Friedman TB, Bonifacino JS, Griffith AJ, Roux I. SLC26A4-AP-2 mu2 interaction regulates SLC26A4 plasma membrane abundance in the endolymphatic sac. SCIENCE ADVANCES 2024; 10:eadm8663. [PMID: 39383236 DOI: 10.1126/sciadv.adm8663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 09/06/2024] [Indexed: 10/11/2024]
Abstract
Decreased presence or activity of human SLC26A4 at the plasma membrane is a common cause of hearing loss. SLC26A4 (Pendrin) is necessary for normal reabsorption of endolymph, the fluid bathing the inner ear. We identified the μ2 subunit of adaptor protein 2 (AP-2) complex required for clathrin-mediated endocytosis as a protein-partner of SLC26A4 involved in regulating its plasma membrane abundance. We showed that, in the endolymphatic sac, where fluid reabsorption occurs, SLC26A4 is localized along the apical microvilli of mitochondria-rich cells, in contact with the endolymph, and associated with clathrin-coated pits where μ2 and AP-2 are present. Based on SLC26A4 structure, the elements involved in SLC26A4-μ2 interaction were identified and validated experimentally, allowing modeling of this interaction at the atomic level. Pharmacological inhibition of clathrin-mediated endocytosis led to an increased plasma membrane abundance of hemagglutinin-tagged SLC26A4 virally or endogenously expressed in mitochondria-rich cells. These results indicate that the SLC26A4-μ2 interaction regulates SLC26A4 abundance at the apical surface of mitochondria-rich cells.
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Affiliation(s)
- Hyun Jae Lee
- Otolaryngology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Cristina Fenollar-Ferrer
- Otolaryngology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Kevin Isgrig
- Inner Ear Gene Therapy Program, Neurotology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Ya-Xian Wang
- Advanced Imaging Core, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Kerstin Valente
- Otolaryngology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Juleh Eide
- Otolaryngology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Keiji Honda
- Department of Otorhinolaryngology, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Wade W Chien
- Inner Ear Gene Therapy Program, Neurotology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Ronald S Petralia
- Advanced Imaging Core, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Lijin Dong
- Genetic Engineering Core, National Eye Institute, National Institutes of Health, Bethesda, MD, USA
| | - Thomas B Friedman
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Juan S Bonifacino
- Neurosciences and Cellular and Structural Biology Division, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | - Andrew J Griffith
- Otolaryngology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
- Department of Otolaryngology, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Isabelle Roux
- Otolaryngology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
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6
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Bonelli S, Lo Pinto M, Ye Y, Mueller SA, Lichtenthaler SF, Scilabra SD. Proteomic characterization of ubiquitin carboxyl-terminal hydrolase 19 deficient cells reveals a role for USP19 in secretion of lysosomal proteins. Mol Cell Proteomics 2024:100854. [PMID: 39389361 DOI: 10.1016/j.mcpro.2024.100854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 09/26/2024] [Accepted: 10/04/2024] [Indexed: 10/12/2024] Open
Abstract
Ubiquitin carboxyl-terminal hydrolase 19 (USP19) is a unique deubiquitinase (DUB), characterized by multiple variants generated by alternative splicing. Several variants bear a C-terminal transmembrane domain that anchors them to the endoplasmic reticulum (ER). Other than regulating protein stability by preventing proteasome degradation, USP19 has been reported to rescue substrates from ER-associated protein degradation (ERAD) in a catalytic-independent manner, promote autophagy and address proteins to lysosomal degradation via endosomal microautophagy. USP19 has recently emerged as the protein responsible for the unconventional secretion of misfolded proteins including Parkinson's disease-associated protein α-synuclein. Despite mounting evidence that USP19 plays crucial roles in several biological processes, the underlying mechanisms are unclear due to lack of information on the physiological substrates of USP19. Herein, we used high-resolution quantitative proteomics to analyze changes in the secretome and cell proteome induced by loss of USP19 to identify proteins whose secretion or turnover is regulated by USP19. We found that ablation of USP19 induced significant proteomic alterations both in and out of the cell. Loss of USP19 impaired the release of several lysosomal proteins, including legumain (LGMN) and several cathepsins. In order to understand the underlaying mechanism, we dissected the USP19-regulated secretion of LGMN in several cell types. We found that LGMN was not a DUB substrate of USP19 and that its USP19-dependent release did not require their direct interaction. LGMN secretion occurred by a mechanism that involved the Golgi apparatus, autophagosome formation and lysosome function. This mechanism resembled the recently described "lysosomal exocytosis", by which lysosomal hydrolases are secreted, when ubiquitination of p62 is increased in cells lacking deubiquitinases such as USP15 and USP17. In conclusion, our proteomic characterization of USP19 has identified a collection of proteins in the secretome and within the cell that are regulated by USP19, which link USP19 to secretion of lysosomal proteins, including LGMN.
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Affiliation(s)
- Simone Bonelli
- Proteomics Group of Ri.MED Foundation, Research Department IRCCS ISMETT (Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione), via E. Tricomi 5, 90145 Palermo, Italy; Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, 90128 Palermo, Italy.
| | - Margot Lo Pinto
- Proteomics Group of Ri.MED Foundation, Research Department IRCCS ISMETT (Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione), via E. Tricomi 5, 90145 Palermo, Italy
| | - Yihong Ye
- Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Stephan A Mueller
- German Center for Neurodegenerative Diseases (DZNE), Feodor-Lynen Strasse 17, 81377, Munich, Germany; Neuroproteomics, School of Medicine and Health, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Stefan F Lichtenthaler
- German Center for Neurodegenerative Diseases (DZNE), Feodor-Lynen Strasse 17, 81377, Munich, Germany; Neuroproteomics, School of Medicine and Health, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany; Munich Cluster for Systems Neurology (SyNergy) Munich, Germany
| | - Simone D Scilabra
- Proteomics Group of Ri.MED Foundation, Research Department IRCCS ISMETT (Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione), via E. Tricomi 5, 90145 Palermo, Italy
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7
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Raj N, Weiß MS, Vos BE, Weischer S, Brinkmann F, Betz T, Trappmann B, Gerke V. Membrane Tension Regulation is Required for Wound Repair. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2402317. [PMID: 39360573 DOI: 10.1002/advs.202402317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 09/17/2024] [Indexed: 10/04/2024]
Abstract
Disruptions of the eukaryotic plasma membrane due to chemical and mechanical challenges are frequent and detrimental and thus need to be repaired to maintain proper cell function and avoid cell death. However, the cellular mechanisms involved in wound resealing and restoration of homeostasis are diverse and contended. Here, it is shown that clathrin-mediated endocytosis is induced at later stages of plasma membrane wound repair following the actual resealing of the wound. This compensatory endocytosis occurs near the wound, predominantly at sites of previous early endosome exocytosis which is required in the initial stage of membrane resealing, suggesting a spatio-temporal co-ordination of exo- and endocytosis during wound repair. Using cytoskeletal alterations and modulations of membrane tension and membrane area, membrane tension is identified as a major regulator of the wounding-associated exo- and endocytic events that mediate efficient wound repair. Thus, membrane tension changes are a universal trigger for plasma membrane wound repair modulating the exocytosis of early endosomes required for resealing and subsequent clathrin-mediated endocytosis acting at later stages to restore cell homeostasis and function.
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Affiliation(s)
- Nikita Raj
- Institute of Medical Biochemistry, Centre for Molecular Biology of Inflammation (ZMBE), Multiscale Imaging Centre, Cells in Motion Interfaculty Center, University of Münster, 48149, Münster, Germany
| | - Martin S Weiß
- Bioactive Materials Laboratory, Max Planck Institute for Molecular Biomedicine, 48149, Münster, Germany
| | - Bart E Vos
- Third Institute of Physics, University of Göttingen, 37077, Göttingen, Germany
| | - Sarah Weischer
- Multiscale Imaging Centre, Cells in Motion Interfaculty Center, University of Münster, 48149, Münster, Germany
| | - Frauke Brinkmann
- Institute of Medical Biochemistry, Centre for Molecular Biology of Inflammation (ZMBE), University of Münster, 48149, Münster, Germany
| | - Timo Betz
- Third Institute of Physics, University of Göttingen, 37077, Göttingen, Germany
- Cluster of Excellence "Multiscale Bioimaging: From Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, 37077, Göttingen, Germany
| | - Britta Trappmann
- Bioactive Materials Laboratory, Max Planck Institute for Molecular Biomedicine, 48149, Münster, Germany
- Department of Chemistry and Chemical Biology, TU Dortmund University, 44227, Dortmund, Germany
| | - Volker Gerke
- Institute of Medical Biochemistry, Centre for Molecular Biology of Inflammation (ZMBE), Multiscale Imaging Centre, Cells in Motion Interfaculty Center, University of Münster, 48149, Münster, Germany
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8
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Amar-Lewis E, Cohen L, Chintakunta R, Benafsha C, Lavi Y, Goldbart R, Traitel T, Gheber LA, Kost J. Elucidating siRNA Cellular Delivery Mechanism Mediated by Quaternized Starch Nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2405524. [PMID: 39359045 DOI: 10.1002/smll.202405524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Revised: 08/30/2024] [Indexed: 10/04/2024]
Abstract
Starch-based nanoparticles are highly utilized in the realm of drug delivery taking advantage of their biocompatibility and biodegradability. Studies have utilized Quaternized starch (Q-starch) for small interfering RNA (siRNA) delivery, in which quaternary amines enable interaction with negatively charged siRNA, resulting in self-assembly complexation. Although reports present numerous applications, the demonstrated efficacy is nonetheless limited due to undiscovered cellular mechanistic delivery. In this study, a deep dive into Q-starch/siRNA complexes' cellular mechanism and kinetics at the cellular level is revealed using single-particle tracking and cell population level using imaging flow cytometry. Uptake studies depict the efficient cellular internalization via endocytosis while a significant fraction of complexes' intracellular fate is lysosome. Utilizing single-particle tracking, it is found that an average of 15% of cellular detected complexes escape the endosome which holds the potential for the integration in the cytoplasmatic gene silencing mechanism. Additional experimental manipulations (overcoming endosomal escape) demonstrate that the complex's disassembly is the rate-limiting step, correlating Q-starch's structure-function properties as siRNA carrier. Structure-function properties accentuating the high affinity of the interaction between Q-starch's quaternary groups and siRNA's phosphate groups that results in low release efficiency. However, low-frequency ultrasound (20 kHz) application may have induced siRNA release resulting in faster gene silencing kinetics.
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Affiliation(s)
- Eliz Amar-Lewis
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Limor Cohen
- Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Ramesh Chintakunta
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Chen Benafsha
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Yael Lavi
- Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Riki Goldbart
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Tamar Traitel
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Levi A Gheber
- Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Joseph Kost
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
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9
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Johnson D, Colijn S, Richee J, Yano J, Burns M, Davis AE, Pham VN, Saric A, Jain A, Yin Y, Castranova D, Melani M, Fujita M, Grainger S, Bonifacino JS, Weinstein BM, Stratman AN. Angiogenesis is limited by LIC1-mediated lysosomal trafficking. Angiogenesis 2024:10.1007/s10456-024-09951-7. [PMID: 39356418 DOI: 10.1007/s10456-024-09951-7] [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: 04/19/2024] [Accepted: 09/25/2024] [Indexed: 10/03/2024]
Abstract
Dynein cytoplasmic 1 light intermediate chain 1 (LIC1, DYNC1LI1) is a core subunit of the dynein motor complex. The LIC1 subunit also interacts with various cargo adaptors to regulate Rab-mediated endosomal recycling and lysosomal degradation. Defects in this gene are predicted to alter dynein motor function, Rab binding capabilities, and cytoplasmic cargo trafficking. Here, we have identified a dync1li1 zebrafish mutant, harboring a premature stop codon at the exon 12/13 splice acceptor site, that displays increased angiogenesis. In vitro, LIC1-deficient human endothelial cells display increases in cell surface levels of the pro-angiogenic receptor VEGFR2, SRC phosphorylation, and Rab11-mediated endosomal recycling. In vivo, endothelial-specific expression of constitutively active Rab11a leads to excessive angiogenesis, similar to the dync1li1 mutants. Increased angiogenesis is also evident in zebrafish harboring mutations in rilpl1/2, the adaptor proteins that promote Rab docking to Lic1 to mediate lysosomal targeting. These findings suggest that LIC1 and the Rab-adaptor proteins RILPL1 and 2 restrict angiogenesis by promoting degradation of VEGFR2-containing recycling endosomes. Disruption of LIC1- and RILPL1/2-mediated lysosomal targeting increases Rab11-mediated recycling endosome activity, promoting excessive SRC signaling and angiogenesis.
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Affiliation(s)
- Dymonn Johnson
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO, 63110, USA
| | - Sarah Colijn
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO, 63110, USA
| | - Jahmiera Richee
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO, 63110, USA
| | - Joseph Yano
- Division of Developmental Biology, Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892, USA
- Cell and Molecular Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Margaret Burns
- Division of Developmental Biology, Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Andrew E Davis
- Division of Developmental Biology, Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Van N Pham
- Division of Developmental Biology, Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Amra Saric
- Section On Intracellular Protein Trafficking, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892, USA
- Neurosciences and Mental Health Program, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, M5G 0A4, Canada
| | - Akansha Jain
- Section On Intracellular Protein Trafficking, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Ying Yin
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO, 63110, USA
| | - Daniel Castranova
- Division of Developmental Biology, Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Mariana Melani
- Division of Developmental Biology, Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892, USA
- Fundación Instituto Leloir, Buenos Aires, Argentina
- Consejo Nacional De Investigaciones Científicas Y Técnicas (CONICET), Buenos Aires, Argentina
- Departamento De Fisiología, Biología Molecular Y Celular, Facultad De Ciencias Exactas Y Naturales, Universidad De Buenos Aires, Buenos Aires, Argentina
| | - Misato Fujita
- Division of Developmental Biology, Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892, USA
- Kanagawa University, Kanagawa, 221-8686, Japan
| | - Stephanie Grainger
- Department of Cell Biology, Van Andel Institute, Grand Rapids, MI, 49503, USA
| | - Juan S Bonifacino
- Section On Intracellular Protein Trafficking, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Brant M Weinstein
- Division of Developmental Biology, Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892, USA.
| | - Amber N Stratman
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO, 63110, USA.
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10
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Martínez-Carrasco R, Fini ME. Dynasore modulates store-operated calcium entry and mitochondrial calcium release in corneal epithelial cells. Exp Eye Res 2024; 247:110029. [PMID: 39127237 PMCID: PMC11413707 DOI: 10.1016/j.exer.2024.110029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 07/15/2024] [Accepted: 08/07/2024] [Indexed: 08/12/2024]
Abstract
Dysregulation of calcium homeostasis can precipitate a cascade of pathological events that lead to tissue damage and cell death. Dynasore is a small molecule that inhibits endocytosis by targeting classic dynamins. In a previous study, we showed that dynasore can protect human corneal epithelial cells from damage due to tert-butyl hydroperoxide (tBHP) exposure by restoring cellular calcium (Ca2+) homeostasis. Here we report results of a follow-up study aimed at identifying the source of the damaging Ca2+. Store-operated Ca2+ entry (SOCE) is a cellular mechanism to restore intracellular calcium stores from the extracellular milieu. We found that dynasore effectively blocks SOCE in cells treated with thapsigargin (TG), a small molecule that inhibits pumping of Ca2+ into the endoplasmic reticulum (ER). Unlike dynasore however, SOCE inhibitor YM-58483 did not interfere with the cytosolic Ca2+ overload caused by tBHP exposure. We also found that dynasore effectively blocks Ca2+ release from internal sources. The inefficacy of inhibitors of ER Ca2+ channels suggested that this compartment was not the source of the Ca2+ surge caused by tBHP exposure. However, using a Ca2+-measuring organelle-entrapped protein indicator (CEPIA) reporter targeted to mitochondria, we found that dynasore can block mitochondrial Ca2+ release due to tBHP exposure. Our results suggest that dynasore exerts multiple effects on cellular Ca2+ homeostasis, with inhibition of mitochondrial Ca2+ release playing a key role in protection of corneal epithelial cells against oxidative stress due to tBHP exposure.
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Affiliation(s)
- Rafael Martínez-Carrasco
- New England Eye Center, Tufts Medical Center and Department of Ophthalmology, Tufts University School of Medicine, 800 Washington St, Boston, MA, 02111, USA
| | - M Elizabeth Fini
- New England Eye Center, Tufts Medical Center and Department of Ophthalmology, Tufts University School of Medicine, 800 Washington St, Boston, MA, 02111, USA; Program in Genetics, Molecular & Cellular Biology, Tufts Graduate School of Biomedical Sciences, Tufts University, 136 Harrison Ave, Boston, MA, USA; Program in Pharmacology & Drug Development, Tufts Graduate School of Biomedical Sciences, 136 Harrison Ave, Tufts University, Boston, MA, USA.
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11
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Arndt H, Bachurski M, Yuanxiang P, Franke K, Wessjohann LA, Kreutz MR, Grochowska KM. A Screen of Plant-Based Natural Products Revealed That Quercetin Prevents Pyroglutamylated Amyloid-β (Aβ3(pE)-42) Uptake in Astrocytes As Well As Resulting Astrogliosis and Synaptic Dysfunction. Mol Neurobiol 2024:10.1007/s12035-024-04509-6. [PMID: 39317890 DOI: 10.1007/s12035-024-04509-6] [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: 03/23/2024] [Accepted: 09/16/2024] [Indexed: 09/26/2024]
Abstract
Two connected histopathological hallmarks of Alzheimer's disease (AD) are chronic neuroinflammation and synaptic dysfunction. The accumulation of the most prevalent posttranslationally modified form of Aβ1-42, pyroglutamylated amyloid-β (Aβ3(pE)-42) in astrocytes is directly linked to glial activation and the release of proinflammatory cytokines that in turn contribute to early synaptic dysfunction in AD. At present, the mechanisms of Aβ3(pE)-42 uptake to astrocytes are unknown and pharmacological interventions that interfere with this process are not available. Here we developed a simple screening assay to identify substances from a plant extract library that prevent astroglial Aβ3(pE)-42 uptake. We first show that this approach yields valid and reproducible results. Second, we show endocytosis of Aβ3(pE)-42 oligomers by astrocytes and that quercetin, a plant flavonol, is effective to specifically block astrocytic buildup of oligomeric Aβ3(pE)-42. Importantly, quercetin does not induce a general impairment of endocytosis. However, it efficiently protects against early synaptic dysfunction following exogenous Aβ3(pE)-42 application.
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Affiliation(s)
- Helene Arndt
- Research Group Neuroplasticity, Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany
| | - Mark Bachurski
- Research Group Neuroplasticity, Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany
| | - PingAn Yuanxiang
- Research Group Neuroplasticity, Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany
| | - Katrin Franke
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06108, Halle, Germany
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, 06108, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103, Leipzig, Germany
| | - Ludger A Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06108, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103, Leipzig, Germany
- Institut Für Chemie, Chair of Natural Products Chemistry, Martin-Luther-University Halle-Wittenberg, 06120, Halle (Saale), Germany
| | - Michael R Kreutz
- Research Group Neuroplasticity, Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany.
- Leibniz Group 'Dendritic Organelles and Synaptic Function', Center for Molecular Neurobiology, ZMNH, University Medical Center Hamburg-Eppendorf, 20251, Hamburg, Germany.
- German Center for Neurodegenerative Diseases (DZNE), 39120, Magdeburg, Germany.
- Center for Behavioral Brain Sciences, Otto Von Guericke University, 39120, Magdeburg, Germany.
| | - Katarzyna M Grochowska
- Research Group Neuroplasticity, Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany.
- Leibniz Group 'Dendritic Organelles and Synaptic Function', Center for Molecular Neurobiology, ZMNH, University Medical Center Hamburg-Eppendorf, 20251, Hamburg, Germany.
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12
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Kew C, Prieto-Garcia C, Bhattacharya A, Tietgen M, MacNair CR, Carfrae LA, Mello-Vieira J, Klatt S, Cheng YL, Rathore R, Gradhand E, Fleming I, Tan MW, Göttig S, Kempf VAJ, Dikic I. The aryl hydrocarbon receptor and FOS mediate cytotoxicity induced by Acinetobacter baumannii. Nat Commun 2024; 15:7939. [PMID: 39261458 PMCID: PMC11390868 DOI: 10.1038/s41467-024-52118-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 08/27/2024] [Indexed: 09/13/2024] Open
Abstract
Acinetobacter baumannii is a pathogenic and multidrug-resistant Gram-negative bacterium that causes severe nosocomial infections. To better understand the mechanism of pathogenesis, we compare the proteomes of uninfected and infected human cells, revealing that transcription factor FOS is the host protein most strongly induced by A. baumannii infection. Pharmacological inhibition of FOS reduces the cytotoxicity of A. baumannii in cell-based models, and similar results are also observed in a mouse infection model. A. baumannii outer membrane vesicles (OMVs) are shown to activate the aryl hydrocarbon receptor (AHR) of host cells by inducing the host enzyme tryptophan-2,3-dioxygenase (TDO), producing the ligand kynurenine, which binds AHR. Following ligand binding, AHR is a direct transcriptional activator of the FOS gene. We propose that A. baumannii infection impacts the host tryptophan metabolism and promotes AHR- and FOS-mediated cytotoxicity of infected cells.
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Affiliation(s)
- Chun Kew
- Institute of Biochemistry II, Faculty of Medicine, Goethe University, Frankfurt, Germany
- Buchmann Institute for Molecular Life Sciences, Goethe University, Frankfurt, Germany
| | - Cristian Prieto-Garcia
- Institute of Biochemistry II, Faculty of Medicine, Goethe University, Frankfurt, Germany
| | - Anshu Bhattacharya
- Institute of Biochemistry II, Faculty of Medicine, Goethe University, Frankfurt, Germany
- Buchmann Institute for Molecular Life Sciences, Goethe University, Frankfurt, Germany
| | - Manuela Tietgen
- Institute for Medical Microbiology and Infection Control, Hospital of the Goethe University, Frankfurt, Germany
- University Center of Competence for Infection Control of the State of Hesse, Frankfurt, Germany
| | - Craig R MacNair
- Department of Infectious Diseases, Genentech Inc., 1 DNA Way, South San Francisco, CA, USA
| | - Lindsey A Carfrae
- Department of Infectious Diseases, Genentech Inc., 1 DNA Way, South San Francisco, CA, USA
| | - João Mello-Vieira
- Institute of Biochemistry II, Faculty of Medicine, Goethe University, Frankfurt, Germany
- Buchmann Institute for Molecular Life Sciences, Goethe University, Frankfurt, Germany
| | - Stephan Klatt
- Institute for Vascular Signalling, Department of Molecular Medicine, CPI, Goethe University, Frankfurt, Germany
| | - Yi-Lin Cheng
- Institute of Biochemistry II, Faculty of Medicine, Goethe University, Frankfurt, Germany
- Buchmann Institute for Molecular Life Sciences, Goethe University, Frankfurt, Germany
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Rajeshwari Rathore
- Institute of Biochemistry II, Faculty of Medicine, Goethe University, Frankfurt, Germany
| | - Elise Gradhand
- Department of Pathology, Dr. Senckenberg Institute of Pathology, Goethe University, Frankfurt, Germany
| | - Ingrid Fleming
- Institute for Vascular Signalling, Department of Molecular Medicine, CPI, Goethe University, Frankfurt, Germany
| | - Man-Wah Tan
- Department of Infectious Diseases, Genentech Inc., 1 DNA Way, South San Francisco, CA, USA
| | - Stephan Göttig
- Institute for Medical Microbiology and Infection Control, Hospital of the Goethe University, Frankfurt, Germany
| | - Volkhard A J Kempf
- Institute for Medical Microbiology and Infection Control, Hospital of the Goethe University, Frankfurt, Germany
| | - Ivan Dikic
- Institute of Biochemistry II, Faculty of Medicine, Goethe University, Frankfurt, Germany.
- Buchmann Institute for Molecular Life Sciences, Goethe University, Frankfurt, Germany.
- Fraunhofer Institute for Molecular Biology and Applied Ecology, Branch Translational Medicine and Pharmacology, Frankfurt, Germany.
- Max Planck Institute of Biophysics, Frankfurt, Germany.
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13
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Sinha JK, Jorwal K, Singh KK, Han SS, Bhaskar R, Ghosh S. The Potential of Mitochondrial Therapeutics in the Treatment of Oxidative Stress and Inflammation in Aging. Mol Neurobiol 2024:10.1007/s12035-024-04474-0. [PMID: 39230868 DOI: 10.1007/s12035-024-04474-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2024] [Accepted: 08/30/2024] [Indexed: 09/05/2024]
Abstract
Mitochondria are central to cellular energy production, and their dysfunction is a major contributor to oxidative stress and chronic inflammation, pivotal factors in aging, and related diseases. With aging, mitochondrial efficiency declines, leading to an increase in ROS and persistent inflammatory responses. Therapeutic interventions targeting mitochondrial health show promise in mitigating these detrimental effects. Antioxidants such as MitoQ and MitoVitE, and supplements like coenzyme Q10 and NAD + precursors, have demonstrated potential in reducing oxidative stress. Additionally, gene therapy aimed at enhancing mitochondrial function, alongside lifestyle modifications such as regular exercise and caloric restriction can ameliorate age-related mitochondrial decline. Exercise not only boosts mitochondrial biogenesis but also improves mitophagy. Enhancing mitophagy is a key strategy to prevent the accumulation of dysfunctional mitochondria, which is crucial for cellular homeostasis and longevity. Pharmacological agents like sulforaphane, SS-31, and resveratrol indirectly promote mitochondrial biogenesis and improve cellular resistance to oxidative damage. The exploration of mitochondrial therapeutics, including emerging techniques like mitochondrial transplantation, offers significant avenues for extending health span and combating age-related diseases. However, translating these findings into clinical practice requires overcoming challenges in precisely targeting dysfunctional mitochondria and optimizing delivery mechanisms for therapeutic agents. Continued research is essential to refine these approaches and fully understand the interplay between mitochondrial dynamics and aging.
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Affiliation(s)
| | - Khanak Jorwal
- GloNeuro, Sector 107, Vishwakarma Road, Noida, Uttar Pradesh, 201301, India
| | - Krishna Kumar Singh
- Symbiosis Centre for Information Technology, Symbiosis International (Deemed University), Pune, Maharashtra, 411057, India
| | - Sung Soo Han
- School of Chemical Engineering, Yeungnam University, Gyeonsang, 38541, Republic of Korea
- Research Institute of Cell Culture, Yeungnam University, Gyeonsang, 38541, Republic of Korea
| | - Rakesh Bhaskar
- School of Chemical Engineering, Yeungnam University, Gyeonsang, 38541, Republic of Korea.
- Research Institute of Cell Culture, Yeungnam University, Gyeonsang, 38541, Republic of Korea.
| | - Shampa Ghosh
- GloNeuro, Sector 107, Vishwakarma Road, Noida, Uttar Pradesh, 201301, India.
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14
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Lacombe A, Scorrano L. The interplay between mitochondrial dynamics and autophagy: From a key homeostatic mechanism to a driver of pathology. Semin Cell Dev Biol 2024; 161-162:1-19. [PMID: 38430721 DOI: 10.1016/j.semcdb.2024.02.001] [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: 11/06/2023] [Revised: 02/06/2024] [Accepted: 02/15/2024] [Indexed: 03/05/2024]
Abstract
The complex relationship between mitochondrial dynamics and autophagy illustrates how two cellular housekeeping processes are intimately linked, illuminating fundamental principles of cellular homeostasis and shedding light on disparate pathological conditions including several neurodegenerative disorders. Here we review the basic tenets of mitochondrial dynamics i.e., the concerted balance between fusion and fission of the organelle, and its interplay with macroautophagy and selective mitochondrial autophagy, also dubbed mitophagy, in the maintenance of mitochondrial quality control and ultimately in cell viability. We illustrate how conditions of altered mitochondrial dynamics reverberate on autophagy and vice versa. Finally, we illustrate how altered interplay between these two key cellular processes participates in the pathogenesis of human disorders affecting multiple organs and systems.
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Affiliation(s)
- Alice Lacombe
- Dept. of Biology, University of Padova, Padova, Italy
| | - Luca Scorrano
- Dept. of Biology, University of Padova, Padova, Italy; Veneto Institute of Molecular Medicine, Padova, Italy.
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15
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Kaur S, Khullar N, Navik U, Bali A, Bhatti GK, Bhatti JS. Multifaceted role of dynamin-related protein 1 in cardiovascular disease: From mitochondrial fission to therapeutic interventions. Mitochondrion 2024; 78:101904. [PMID: 38763184 DOI: 10.1016/j.mito.2024.101904] [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: 12/06/2023] [Revised: 05/01/2024] [Accepted: 05/15/2024] [Indexed: 05/21/2024]
Abstract
Mitochondria are central to cellular energy production and metabolic regulation, particularly in cardiomyocytes. These organelles constantly undergo cycles of fusion and fission, orchestrated by key proteins like Dynamin-related Protein 1 (Drp-1). This review focuses on the intricate roles of Drp-1 in regulating mitochondrial dynamics, its implications in cardiovascular health, and particularly in myocardial infarction. Drp-1 is not merely a mediator of mitochondrial fission; it also plays pivotal roles in autophagy, mitophagy, apoptosis, and necrosis in cardiac cells. This multifaceted functionality is often modulated through various post-translational alterations, and Drp-1's interaction with intracellular calcium (Ca2 + ) adds another layer of complexity. We also explore the pathological consequences of Drp-1 dysregulation, including increased reactive oxygen species (ROS) production and endothelial dysfunction. Furthermore, this review delves into the potential therapeutic interventions targeting Drp-1 to modulate mitochondrial dynamics and improve cardiovascular outcomes. We highlight recent findings on the interaction between Drp-1 and sirtuin-3 and suggest that understanding this interaction may open new avenues for therapeutically modulating endothelial cells, fibroblasts, and cardiomyocytes. As the cardiovascular system increasingly becomes the focal point of aging and chronic disease research, understanding the nuances of Drp-1's functionality can lead to innovative therapeutic approaches.
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Affiliation(s)
- Satinder Kaur
- Laboratory of Translational Medicine and Nanotherapeutics, Department of Human Genetics and Molecular Medicine, School of Health Sciences, Central University of Punjab, Bathinda India
| | - Naina Khullar
- Department of Zoology, Mata Gujri College, Fatehgarh Sahib, Punjab, India
| | - Umashanker Navik
- Department of Pharmacology, Central University of Punjab, Ghudda, Bathinda, India
| | - Anjana Bali
- Department of Pharmacology, Central University of Punjab, Ghudda, Bathinda, India
| | - Gurjit Kaur Bhatti
- Department of Medical Lab Technology, University Institute of Applied Health Sciences, Chandigarh University, Mohali India.
| | - Jasvinder Singh Bhatti
- Laboratory of Translational Medicine and Nanotherapeutics, Department of Human Genetics and Molecular Medicine, School of Health Sciences, Central University of Punjab, Bathinda India.
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16
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Chen F, Zhang D, Cheng L, Zhao D, Ye H, Zheng S, Yang Q, Han B, Wang R, Li J, Chen S. Xiaowugui decoction alleviates experimental rheumatoid arthritis by suppressing Rab5a-mediated TLR4 internalization in macrophages. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 132:155762. [PMID: 38964156 DOI: 10.1016/j.phymed.2024.155762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 05/09/2024] [Accepted: 05/18/2024] [Indexed: 07/06/2024]
Abstract
BACKGROUND Rheumatoid arthritis (RA) is a chronic autoimmune disorder characterized by exacerbated synovial inflammation and joint destruction. Recent studies suggest toll-like receptor 4 (TLR4) internalization facilitate inflammatory response of macrophage. The role of TLR4 internalization in the pathogenesis of RA is unknown. PURPOSE To investigate the role and mechanism of TLR4 internalization in macrophage inflammatory response of RA and explore whether TLR4 internalization mediates the anti-arthritic effect of Xiaowugui (XWG) decoction, a patented herbal formula used in China. METHODS The co-expression of TLR4 and the internalization marker, early endosome antigen 1 (EEA1), in the synovial samples of RA patients and joint tissue of collagen-induced arthritis (CIA) mice, were evaluated using immunofluorescence. The effect of Rab5a-mediated early internalization of TLR4 on the activation induced by lipopolysaccharide (LPS) in RAW264.7 cells was investigated using small interfering RNAs that act against Rab5a. CIA was induced in Rab5a-/- mice to evaluate the role of Rab5a in vivo. The disease progression and expression of Rab5a and TLR4 in the joint tissue were evaluated in CIA mice treated with XWG. Inflammatory factors production, TLR4 internalization, and activation of downstream signaling pathways were examined in RAW264.7 cells treated with XWG in vitro. RESULTS The co-expression and co-localization of TLR4 and EEA1 were elevated in the synovial samples of RA patients and joint tissue of CIA mice. Pharmaceutical inhibition of TLR4 internalization reduced macrophages inflammatory responses induced by LPS. The co-expression and co-localization of Rab5a and TLR4 were significantly increased in macrophages treated with LPS. Silencing Rab5a reduced LPS-induced TLR4 internalization, inflammatory factors production, and phosphorylation of Jun N-terminal kinases (JNK) and p65. Genetic deletion of Rab5a inhibited TLR4 internalization and the development of arthritis in vivo. The co-expression of TLR4 and Rab5a was also elevated in the synovial samples of RA patients. XWG treatment of mice with CIA alleviated arthritis and reduced the co-expression of Rab5a and TLR4 in the joint tissue. XWG treatment of macrophage inhibited LPS-induced IL-6 and TNF-α production, co-expression of Rab5a and TLR4, and phosphorylation of JNK and p65. CONCLUSIONS Our findings highlight the pathogenic role of TLR4 internalization in patients with RA and identify a novel Rab5a-dependent internalization pathway that promotes macrophage inflammatory response. XWG treatment demonstrated outstanding therapeutic effects in experimental arthritis, and targeting the Rab5a-mediated internalization of TLR4 may be the main underlying mechanism.
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Affiliation(s)
- Feilong Chen
- Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China; Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, PR China
| | - Dingding Zhang
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, PR China
| | - Lifang Cheng
- Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China
| | - Di Zhao
- Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China; Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, PR China
| | - Haixin Ye
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, PR China
| | - Songyuan Zheng
- Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China
| | - Qian Yang
- Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China
| | - Bingqi Han
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, PR China
| | - Ran Wang
- Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China
| | - Juan Li
- Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China; Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, PR China.
| | - Shixian Chen
- Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China.
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17
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Li Z, Liang S, Ke L, Wang M, Gao K, Li D, Xu Z, Li N, Zhang P, Cheng W. Cell life-or-death events in osteoporosis: All roads lead to mitochondrial dynamics. Pharmacol Res 2024; 208:107383. [PMID: 39214266 DOI: 10.1016/j.phrs.2024.107383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 08/14/2024] [Accepted: 08/26/2024] [Indexed: 09/04/2024]
Abstract
Mitochondria exhibit heterogeneous shapes and networks within and among cell types and tissues, also in normal or osteoporotic bone tissues with complex cell types. This dynamic characteristic is determined by the high plasticity provided by mitochondrial dynamics and is stemmed from responding to the survival and functional requirements of various bone cells in a specific microenvironments. In contrast, mitochondrial dysfunction, induced by dysregulation of mitochondrial dynamics, may act as a trigger of cell death signals, including common apoptosis and other forms of programmed cell death (PCD). These PCD processes consisting of tightly structured cascade gene expression events, can further influence the bone remodeling by facilitating the death of various bone cells. Mitochondrial dynamics, therefore, drive the bone cells to stand at the crossroads of life and death by integrating external signals and altering metabolism, shape, and signal-response properties of mitochondria. This implies that targeting mitochondrial dynamics displays significant potential in treatment of osteoporosis. Considerable effort has been made in osteoporosis to emphasize the parallel roles of mitochondria in regulating energy metabolism, calcium signal transduction, oxidative stress, inflammation, and cell death. However, the emerging field of mitochondrial dynamics-related PCD is not well understood. Herein, to bridge the gap, we outline the latest knowledge on mitochondrial dynamics regulating bone cell life or death during normal bone remodeling and osteoporosis.
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Affiliation(s)
- Zhichao Li
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China; Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China; Department of Orthopedics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250014, China
| | - Songlin Liang
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China; Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Liqing Ke
- Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Mengjie Wang
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China
| | - Kuanhui Gao
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China
| | - Dandan Li
- College of Integrated Traditional Chinese and Western Medicine, Hebei University of Chinese Medicine, Shijiazhuang, 050011, China
| | - Zhanwang Xu
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China; Department of Orthopedics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250014, China
| | - Nianhu Li
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China; Department of Orthopedics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250014, China.
| | - Peng Zhang
- Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China; Faculty of Biomedical Engineering, Shenzhen University of Advanced Technology, Shenzhen, 518000, China; Key Laboratory of Biomedical Imaging Science and System, Chinese Academy of Sciences, Shenzhen, 518000, China; Shandong Zhongke Advanced Technology Co., Ltd., Jinan, 250300, China.
| | - Wenxiang Cheng
- Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China.
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18
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Nair AG, Bollmohr N, Schökle L, Keim J, Melero JMM, Müller M. Presynaptic quantal size enhancement counteracts post-tetanic release depression. J Physiol 2024. [PMID: 39183664 DOI: 10.1113/jp286176] [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: 04/25/2024] [Accepted: 07/30/2024] [Indexed: 08/27/2024] Open
Abstract
Repetitive synaptic stimulation can induce different forms of synaptic plasticity but may also limit the robustness of synaptic transmission by exhausting key resources. Little is known about how synaptic transmission is stabilized after high-frequency stimulation. In the present study, we observed that tetanic stimulation of the Drosophila neuromuscular junction (NMJ) decreases quantal content, release-ready vesicle pool size and synaptic vesicle density for minutes after stimulation. This was accompanied by a pronounced increase in quantal size. Interestingly, action potential-evoked synaptic transmission remained largely unchanged. EPSC amplitude fluctuation analysis confirmed the post-tetanic increase in quantal size and the decrease in quantal content, suggesting that the quantal size increase counteracts release depression to maintain evoked transmission. The magnitude of the post-tetanic quantal size increase and release depression correlated with stimulation frequency and duration, indicating activity-dependent stabilization of synaptic transmission. The post-tetanic quantal size increase persisted after genetic ablation of the glutamate receptor subunits GluRIIA or GluRIIB, and glutamate receptor calcium permeability, as well as blockade of postsynaptic calcium channels. By contrast, it was strongly attenuated by pharmacological or presynaptic genetic perturbation of the GTPase dynamin. Similar observations were made after inhibition of the H+-ATPase, suggesting that the quantal size increase is presynaptically driven. Additionally, dynamin and H+-ATPase perturbation resulted in a post-tetanic decrease in evoked amplitudes. Finally, we observed an increase in synaptic vesicle diameter after tetanic stimulation. Thus, a presynaptically-driven quantal size increase, likely mediated by larger synaptic vesicles, counterbalances post-tetanic release depression, thereby conferring robustness to synaptic transmission on the minute time scale. KEY POINTS: Many synapses transmit robustly after sustained activity despite the limitation of key resources, such as release-ready synaptic vesicles. We report robust synaptic transmission after sustained high-frequency stimulation of the Drosophila neuromuscular junction despite a reduction in release-ready vesicle number. An increased postsynaptic response to individual vesicles, likely driven by an increase in vesicle size due to endocytosis defects, stabilizes synaptic efficacy for minutes after sustained activity. Our study provides novel insights into the mechanisms governing synaptic stability after sustained neural activity.
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Affiliation(s)
- Anu G Nair
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Present address: Roche Pharma Research and Early Development, Basel, Switzerland
| | - Nasrin Bollmohr
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich/ETH Zurich, Zurich, Switzerland
| | - Levin Schökle
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
| | - Jennifer Keim
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- Present address: AbbVie AG, Cham, Switzerland
| | | | - Martin Müller
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich/ETH Zurich, Zurich, Switzerland
- University Research Priority Program (URPP), Adaptive Brain Circuits in Development and Learning (AdaBD), University of Zurich, Zurich, Switzerland
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19
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Khan S, Bano N, Ahamad S, John U, Dar NJ, Bhat SA. Excitotoxicity, Oxytosis/Ferroptosis, and Neurodegeneration: Emerging Insights into Mitochondrial Mechanisms. Aging Dis 2024:AD.2024.0125-1. [PMID: 39122453 DOI: 10.14336/ad.2024.0125-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 08/01/2024] [Indexed: 08/12/2024] Open
Abstract
Mitochondrial dysfunction plays a pivotal role in the development of age-related diseases, particularly neurodegenerative disorders. The etiology of mitochondrial dysfunction involves a multitude of factors that remain elusive. This review centers on elucidating the role(s) of excitotoxicity, oxytosis/ferroptosis and neurodegeneration within the context of mitochondrial bioenergetics, biogenesis, mitophagy and oxidative stress and explores their intricate interplay in the pathogenesis of neurodegenerative diseases. The effective coordination of mitochondrial turnover processes, notably mitophagy and biogenesis, is assumed to be critically important for cellular resilience and longevity. However, the age-associated decrease in mitophagy impedes the elimination of dysfunctional mitochondria, consequently impairing mitochondrial biogenesis. This deleterious cascade results in the accumulation of damaged mitochondria and deterioration of cellular functions. Both excitotoxicity and oxytosis/ferroptosis have been demonstrated to contribute significantly to the pathophysiology of neurodegenerative diseases, including Alzheimer's disease (AD), Parkinson's disease (PD), Huntington's Disease (HD), Amyotrophic Lateral Sclerosis (ALS) and Multiple Sclerosis (MS). Excitotoxicity, characterized by excessive glutamate signaling, initiates a cascade of events involving calcium dysregulation, energy depletion, and oxidative stress and is intricately linked to mitochondrial dysfunction. Furthermore, emerging concepts surrounding oxytosis/ferroptosis underscore the importance of iron-dependent lipid peroxidation and mitochondrial engagement in the pathogenesis of neurodegeneration. This review not only discusses the individual contributions of excitotoxicity and ferroptosis but also emphasizes their convergence with mitochondrial dysfunction, a key driver of neurodegenerative diseases. Understanding the intricate crosstalk between excitotoxicity, oxytosis/ferroptosis, and mitochondrial dysfunction holds potential to pave the way for mitochondrion-targeted therapeutic strategies. Such strategies, with a focus on bioenergetics, biogenesis, mitophagy, and oxidative stress, emerge as promising avenues for therapeutic intervention.
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Affiliation(s)
- Sameera Khan
- Department of Zoology, Aligarh Muslim University, Aligarh-202002, India
| | - Nargis Bano
- Department of Zoology, Aligarh Muslim University, Aligarh-202002, India
| | - Shakir Ahamad
- Department of Chemistry, Aligarh Muslim University, Aligarh-202002, India
| | - Urmilla John
- School of Studies in Neuroscience, Jiwaji University, Gwalior, India; School of Studies in Zoology, Jiwaji University, Gwalior, India
| | - Nawab John Dar
- CNB, SALK Institute of Biological Sciences, La Jolla, CA 92037, USA
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20
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May CK, Noble PW, Herzog EL, Meffre E, Hansen JE. Nuclear-penetrating scleroderma autoantibody inhibits topoisomerase 1 cleavage complex formation. Biochem Biophys Res Commun 2024; 720:150123. [PMID: 38759301 DOI: 10.1016/j.bbrc.2024.150123] [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: 05/09/2024] [Accepted: 05/13/2024] [Indexed: 05/19/2024]
Abstract
The contributions of anti-Topoisomerase 1 (Top1) autoantibodies to the pathophysiology of diffuse cutaneous systemic sclerosis (dcSSc), the most aggressive scleroderma subtype, are unknown. Top1 catalyzes DNA relaxation and unwinding in cell nuclei, a site previously considered inaccessible to antibodies. The discovery of autoantibodies in systemic lupus erythematosus that penetrate nuclei and inhibit DNA repair raised the possibility that nuclear-penetrating autoantibodies contribute to mechanisms of autoimmunity. Here we show that an anti-Top1 autoantibody produced by a single B cell clone from a patient with dcSSc penetrates live cells and localizes into nuclei. Functionally, the autoantibody inhibits formation of the Top1 cleavage complex necessary for DNA nicking, which distinguishes it from cytotoxic camptothecin Top1 inhibitors used in cancer therapy that trap the cleavage complex rather than preventing its formation. Discovery of a patient-derived cell-penetrating scleroderma anti-Top1 autoantibody that inhibits Top1 cleavage complex formation supports the hypothesis that anti-Top1 autoantibodies contribute to cellular dysfunction in dcSSc and offers a valuable antibody reagent resource for future studies on anti-Top1 autoantibody contributions to scleroderma pathophysiology.
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Affiliation(s)
- Christopher K May
- Department of Therapeutic Radiology, Yale School of Medicine, 15 York St., New Haven, CT, 06520, USA
| | - Philip W Noble
- Department of Therapeutic Radiology, Yale School of Medicine, 15 York St., New Haven, CT, 06520, USA
| | - Erica L Herzog
- Department of Internal Medicine, Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, 300 Cedar St., New Haven, CT, 06520, USA
| | - Eric Meffre
- Department of Immunobiology, Yale School of Medicine, 300 Cedar St., New Haven, CT, 06520, USA; Section of Rheumatology, Allergy, and Clinical Immunology, Yale School of Medicine, 300 Cedar St., New Haven, CT, 06520, USA
| | - James E Hansen
- Department of Therapeutic Radiology, Yale School of Medicine, 15 York St., New Haven, CT, 06520, USA; Yale Cancer Center, 333 Cedar St., New Haven, CT, 06520, USA.
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21
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Ramirez-Velez I, Namjoshi AA, Effiong UM, Peppas NA, Belardi B. Paracellular Delivery of Protein Drugs with Smart EnteroPatho Nanoparticles. ACS NANO 2024. [PMID: 39096293 DOI: 10.1021/acsnano.4c02116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/05/2024]
Abstract
A general platform for the safe and effective oral delivery of biologics would revolutionize the administration of protein-based drugs, improving access for patients and lowering the financial burden on the health-care industry. Because of their dimensions and physiochemical properties, nanomaterials stand as promising vehicles for navigating the complex and challenging environment in the gastrointestinal (GI) tract. Recent developments have led to materials that protect protein drugs from degradation and enable controlled release in the small intestine, the site of absorption for most proteins. Yet, once present in the small intestine, the protein must transit through the secreted mucus and epithelial cells of the intestinal mucosa into systemic circulation, a process that remains a bottleneck for nanomaterial-based delivery. One attractive pathway through the intestinal mucosa is the paracellular route, which avoids cell trafficking and other degradative processes in the interior of cells. Direct flux between cells is regulated by epithelial tight junctions (TJs) that seal the paracellular space and prevent protein flux. Here, we describe a smart nanoparticle system that directly and transiently disrupts TJs for improved protein delivery, an unrealized goal to-date. We take inspiration from enteropathogenic bacteria that adhere to intestinal epithelia and secrete inhibitors that block TJ interactions in the local environment. To mimic these natural mechanisms, we engineer nanoparticles (EnteroPatho NPs) that attach to the epithelial glycocalyx and release TJ modulators in response to the intestinal pH. We show that EnteroPatho NPs lead to TJ disruption and paracellular protein delivery, giving rise to a general platform for oral delivery.
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Affiliation(s)
- Isabela Ramirez-Velez
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Aditya A Namjoshi
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Unyime M Effiong
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Nicholas A Peppas
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Institute for Biomaterials, Drug Delivery and Regenerative Medicine, The University of Texas at Austin, Austin, Texas 78712, United States
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Department of Pediatrics, Dell Medical School, The University of Texas at Austin, Austin, Texas 78712, United States
- Department of Surgery and Perioperative Care, Dell Medical School, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Brian Belardi
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
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22
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Adamo G, Santonicola P, Picciotto S, Gargano P, Nicosia A, Longo V, Aloi N, Romancino DP, Paterna A, Rao E, Raccosta S, Noto R, Salamone M, Deidda I, Costa S, Di Sano C, Zampi G, Morsbach S, Landfester K, Colombo P, Wei M, Bergese P, Touzet N, Manno M, Di Schiavi E, Bongiovanni A. Extracellular vesicles from the microalga Tetraselmis chuii are biocompatible and exhibit unique bone tropism along with antioxidant and anti-inflammatory properties. Commun Biol 2024; 7:941. [PMID: 39097626 PMCID: PMC11297973 DOI: 10.1038/s42003-024-06612-9] [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: 10/03/2023] [Accepted: 07/22/2024] [Indexed: 08/05/2024] Open
Abstract
Extracellular vesicles (EVs) are membrane-enclosed bio-nanoparticles secreted by cells and naturally evolved to transport various bioactive molecules between cells and even organisms. These cellular objects are considered one of the most promising bio-nanovehicles for the delivery of native and exogenous molecular cargo. However, many challenges with state-of-the-art EV-based candidates as drug carriers still exist, including issues with scalability, batch-to-batch reproducibility, and cost-sustainability of the final therapeutic formulation. Microalgal extracellular vesicles, which we named nanoalgosomes, are naturally released by various microalgal species. Here, we evaluate the innate biological properties of nanoalgosomes derived from cultures of the marine microalgae Tetraselmis chuii, using an optimized manufacturing protocol. Our investigation of nanoalgosome biocompatibility in preclinical models includes toxicological analyses, using the invertebrate model organism Caenorhabditis elegans, hematological and immunological evaluations ex vivo and in mice. We evaluate nanoalgosome cellular uptake mechanisms in C. elegans at cellular and subcellular levels, and study their biodistribution in mice with accurate space-time resolution. Further examination highlights the antioxidant and anti-inflammatory bioactivities of nanoalgosomes. This holistic approach to nanoalgosome functional characterization demonstrates that they are biocompatible and innate bioactive effectors with unique bone tropism. These findings suggest that nanoalgosomes have significant potential for future therapeutic applications.
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Affiliation(s)
- Giorgia Adamo
- Cell-Tech HUB at Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
| | - Pamela Santonicola
- Institute of Biosciences and BioResources, National Research Council (CNR), Naples, Italy
| | - Sabrina Picciotto
- Cell-Tech HUB at Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
| | - Paola Gargano
- Cell-Tech HUB at Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
| | - Aldo Nicosia
- Cell-Tech HUB at Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
| | - Valeria Longo
- Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
| | - Noemi Aloi
- Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
| | - Daniele P Romancino
- Cell-Tech HUB at Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
| | - Angela Paterna
- Cell-Tech HUB at Institute of Biophysics, National Research Council of Italy (CNR), Palermo, Italy
| | - Estella Rao
- Cell-Tech HUB at Institute of Biophysics, National Research Council of Italy (CNR), Palermo, Italy
| | - Samuele Raccosta
- Cell-Tech HUB at Institute of Biophysics, National Research Council of Italy (CNR), Palermo, Italy
| | - Rosina Noto
- Cell-Tech HUB at Institute of Biophysics, National Research Council of Italy (CNR), Palermo, Italy
| | - Monica Salamone
- Cell-Tech HUB at Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
| | - Irene Deidda
- Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
| | - Salvatore Costa
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, University of Palermo, Palermo, Italy
| | - Caterina Di Sano
- Institute of Translational Pharmacology, National Research Council of Italy (CNR), Palermo, Italy
| | - Giuseppina Zampi
- Institute of Biosciences and BioResources, National Research Council (CNR), Naples, Italy
| | - Svenja Morsbach
- Max Planck Institute for Polymer Research (MPIP), Mainz, Germany
| | | | - Paolo Colombo
- Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
| | - Mingxing Wei
- Cellvax SAS, Villejuif Bio Park, 1 Mail du Professeur Georges Mathé, Villejuif, France
| | - Paolo Bergese
- Cell-Tech HUB at Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
- Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
- Center for Colloid and Surface Science (CSGI), Florence, Italy
| | - Nicolas Touzet
- Department of Environmental Science, School of Science, Centre for Environmental Research, Innovation and Sustainability, CERIS, Atlantic Technological University Sligo, Sligo, Ireland
| | - Mauro Manno
- Cell-Tech HUB at Institute of Biophysics, National Research Council of Italy (CNR), Palermo, Italy
| | - Elia Di Schiavi
- Institute of Biosciences and BioResources, National Research Council (CNR), Naples, Italy
| | - Antonella Bongiovanni
- Cell-Tech HUB at Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy.
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23
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Mohd S, Oder A, Specker E, Neuenschwander M, Von Kries JP, Daumke O. Identification of drug-like molecules targeting the ATPase activity of dynamin-like EHD4. PLoS One 2024; 19:e0302704. [PMID: 39074100 DOI: 10.1371/journal.pone.0302704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 07/13/2024] [Indexed: 07/31/2024] Open
Abstract
Eps15 (epidermal growth factor receptor pathway substrate 15) homology domain-containing proteins (EHDs) comprise a family of eukaryotic dynamin-related ATPases that participate in various endocytic membrane trafficking pathways. Dysregulation of EHDs function has been implicated in various diseases, including cancer. The lack of small molecule inhibitors which acutely target individual EHD members has hampered progress in dissecting their detailed cellular membrane trafficking pathways and their function during disease. Here, we established a Malachite green-based assay compatible with high throughput screening to monitor the liposome-stimulated ATPase of EHD4. In this way, we identified a drug-like molecule that inhibited EHD4's liposome-stimulated ATPase activity. Structure activity relationship (SAR) studies indicated sites of preferred substitutions for more potent inhibitor synthesis. Moreover, the assay optimization in this work can be applied to other dynamin family members showing a weak and liposome-dependent nucleotide hydrolysis activity.
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Affiliation(s)
- Saif Mohd
- Structural Biology, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Andreas Oder
- Screening Unit, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany
| | - Edgar Specker
- Screening Unit, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany
| | - Martin Neuenschwander
- Screening Unit, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany
| | - Jens Peter Von Kries
- Screening Unit, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany
| | - Oliver Daumke
- Structural Biology, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
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24
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Hernández-García D, García-Meléndrez C, Hernández-Martínez R, Collazo-Navarrete O, Covarrubias L. Macrophages allocate before apoptosis initiation and produce reactive oxygen species during interdigital phagocytosis. Biol Open 2024; 13:bio060492. [PMID: 39052046 PMCID: PMC11445842 DOI: 10.1242/bio.060492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 04/23/2024] [Indexed: 07/27/2024] Open
Abstract
During programmed cell death (PCD), it is commonly accepted that macrophages are recruited by apoptotic cells to complete cell degradation. Interdigital cell death, a classical model of PCD, contributes to digit individualization in limbs of mammals and other vertebrates. Here, we show that macrophages are present in interdigits before significant cell death occurs and remain after apoptosis inhibition. The typical interdigital phagocytic activity was not observed after a partial depletion of macrophages and was markedly reduced by engulfment/phagosome maturation inhibition, as detected by its association with high lysosomal activity. β-galactosidase activity in this region was also coupled with phagocytosis, against its relationship with cellular senescence. Interdigital phagocytosis correlated with high levels of reactive oxygen species (ROS), common in embryo regions carrying abundant cell death, suggesting that macrophages are the major source of ROS. ROS generation was dependent on NADPH oxidases and blood vessel integrity, but not directly associated with lysosomal activity. Therefore, macrophages prepattern regions where abundant cell death is going to occur, and high lysosomal activity and the generation of ROS by an oxidative burst-like phenomenon are activities of phagocytosis.
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Affiliation(s)
- David Hernández-García
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor., CP 62210, México
| | - Celina García-Meléndrez
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor., CP 62210, México
| | - Rocío Hernández-Martínez
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor., CP 62210, México
| | - Omar Collazo-Navarrete
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor., CP 62210, México
| | - Luis Covarrubias
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor., CP 62210, México
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25
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Yu K, Yao KR, Aguinaga MA, Choquette JM, Liu C, Wang Y, Liao D. G272V and P301L Mutations Induce Isoform Specific Tau Mislocalization to Dendritic Spines and Synaptic Dysfunctions in Cellular Models of 3R and 4R Tau Frontotemporal Dementia. J Neurosci 2024; 44:e1215232024. [PMID: 38858079 PMCID: PMC11236579 DOI: 10.1523/jneurosci.1215-23.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 05/10/2024] [Accepted: 05/16/2024] [Indexed: 06/12/2024] Open
Abstract
Tau pathologies are detected in the brains of some of the most common neurodegenerative diseases including Alzheimer's disease (AD), Lewy body dementia (LBD), chronic traumatic encephalopathy (CTE), and frontotemporal dementia (FTD). Tau proteins are expressed in six isoforms with either three or four microtubule-binding repeats (3R tau or 4R tau) due to alternative RNA splicing. AD, LBD, and CTE brains contain pathological deposits of both 3R and 4R tau. FTD patients can exhibit either 4R tau pathologies in most cases or 3R tau pathologies less commonly in Pick's disease, which is a subfamily of FTD. Here, we report the isoform-specific roles of tau in FTD. The P301L mutation, linked to familial 4R tau FTD, induces mislocalization of 4R tau to dendritic spines in primary hippocampal cultures that were prepared from neonatal rat pups of both sexes. Contrastingly, the G272V mutation, linked to familial Pick's disease, induces phosphorylation-dependent mislocalization of 3R tau but not 4R tau proteins to dendritic spines. The overexpression of G272V 3R tau but not 4R tau proteins leads to the reduction of dendritic spine density and suppression of mEPSCs in 5-week-old primary rat hippocampal cultures. The decrease in mEPSC amplitude caused by G272V 3R tau is dynamin-dependent whereas that caused by P301L 4R tau is dynamin-independent, indicating that the two tau isoforms activate different signaling pathways responsible for excitatory synaptic dysfunction. Our 3R and 4R tau studies here will shed new light on diverse mechanisms underlying FTD, AD, LBD, and CTE.
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Affiliation(s)
- Ke Yu
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota 55455
- Department of General Practice, The General Hospital of Western Theater Command, Chengdu 610083, China
| | - Katherine R Yao
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota 55455
- College of Biological Sciences, University of Minnesota, St Paul, Minnesota 55108
| | - Miguel A Aguinaga
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota 55455
- College of Biological Sciences, University of Minnesota, St Paul, Minnesota 55108
| | - Jessica M Choquette
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota 55455
| | - Chengliang Liu
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota 55455
| | - Yuxin Wang
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota 55455
| | - Dezhi Liao
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota 55455
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26
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Li H, Dai X, Zhou J, Wang Y, Zhang S, Guo J, Shen L, Yan H, Jiang H. Mitochondrial dynamics in pulmonary disease: Implications for the potential therapeutics. J Cell Physiol 2024:e31370. [PMID: 38988059 DOI: 10.1002/jcp.31370] [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: 02/26/2024] [Revised: 06/18/2024] [Accepted: 06/26/2024] [Indexed: 07/12/2024]
Abstract
Mitochondria are dynamic organelles that continuously undergo fusion/fission to maintain normal cell physiological activities and energy metabolism. When mitochondrial dynamics is unbalanced, mitochondrial homeostasis is broken, thus damaging mitochondrial function. Accumulating evidence demonstrates that impairment in mitochondrial dynamics leads to lung tissue injury and pulmonary disease progression in a variety of disease models, including inflammatory responses, apoptosis, and barrier breakdown, and that the role of mitochondrial dynamics varies among pulmonary diseases. These findings suggest that modulation of mitochondrial dynamics may be considered as a valid therapeutic strategy in pulmonary diseases. In this review, we discuss the current evidence on the role of mitochondrial dynamics in pulmonary diseases, with a particular focus on its underlying mechanisms in the development of acute lung injury (ALI)/acute respiratory distress syndrome (ARDS), chronic obstructive pulmonary disease (COPD), asthma, pulmonary fibrosis (PF), pulmonary arterial hypertension (PAH), lung cancer and bronchopulmonary dysplasia (BPD), and outline effective drugs targeting mitochondrial dynamics-related proteins, highlighting the great potential of targeting mitochondrial dynamics in the treatment of pulmonary disease.
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Affiliation(s)
- Hui Li
- Immunotherapy Laboratory, College of Pharmacology, Southwest Minzu University, Chengdu, Sichuan, China
| | - Xinyan Dai
- Immunotherapy Laboratory, College of Grassland Resources, Southwest Minzu University, Chengdu, Sichuan, China
| | - Junfu Zhou
- Immunotherapy Laboratory, College of Pharmacology, Southwest Minzu University, Chengdu, Sichuan, China
| | - Yujuan Wang
- Immunotherapy Laboratory, College of Grassland Resources, Southwest Minzu University, Chengdu, Sichuan, China
| | - Shiying Zhang
- Immunotherapy Laboratory, College of Grassland Resources, Southwest Minzu University, Chengdu, Sichuan, China
| | - Jiacheng Guo
- Immunotherapy Laboratory, College of Grassland Resources, Southwest Minzu University, Chengdu, Sichuan, China
| | - Lidu Shen
- Immunotherapy Laboratory, College of Pharmacology, Southwest Minzu University, Chengdu, Sichuan, China
| | - Hengxiu Yan
- Immunotherapy Laboratory, College of Pharmacology, Southwest Minzu University, Chengdu, Sichuan, China
| | - Huiling Jiang
- Immunotherapy Laboratory, College of Pharmacology, Southwest Minzu University, Chengdu, Sichuan, China
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27
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Aureille J, Prabhu SS, Barnett SF, Farrugia AJ, Arnal I, Lafanechère L, Low BC, Kanchanawong P, Mogilner A, Bershadsky AD. Focal adhesions are controlled by microtubules through local contractility regulation. EMBO J 2024; 43:2715-2732. [PMID: 38769437 PMCID: PMC11217342 DOI: 10.1038/s44318-024-00114-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 04/12/2024] [Accepted: 04/15/2024] [Indexed: 05/22/2024] Open
Abstract
Microtubules regulate cell polarity and migration via local activation of focal adhesion turnover, but the mechanism of this process is insufficiently understood. Molecular complexes containing KANK family proteins connect microtubules with talin, the major component of focal adhesions. Here, local optogenetic activation of KANK1-mediated microtubule/talin linkage promoted microtubule targeting to an individual focal adhesion and subsequent withdrawal, resulting in focal adhesion centripetal sliding and rapid disassembly. This sliding is preceded by a local increase of traction force due to accumulation of myosin-II and actin in the proximity of the focal adhesion. Knockdown of the Rho activator GEF-H1 prevented development of traction force and abolished sliding and disassembly of focal adhesions upon KANK1 activation. Other players participating in microtubule-driven, KANK-dependent focal adhesion disassembly include kinases ROCK, PAK, and FAK, as well as microtubules/focal adhesion-associated proteins kinesin-1, APC, and αTAT. Based on these data, we develop a mathematical model for a microtubule-driven focal adhesion disruption involving local GEF-H1/RhoA/ROCK-dependent activation of contractility, which is consistent with experimental data.
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Affiliation(s)
- Julien Aureille
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore.
| | - Srinivas S Prabhu
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
| | - Sam F Barnett
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
| | - Aaron J Farrugia
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
| | - Isabelle Arnal
- Grenoble institute of Neuroscience, University Grenoble Alpes, INSERM U1216, Grenoble, France
| | - Laurence Lafanechère
- University Grenoble Alpes, INSERM U1209, CNRS UMR5309, Institute for Advanced Biosciences, Grenoble, France
| | - Boon Chuan Low
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
| | - Pakorn Kanchanawong
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
- Department of Biomedical Engineering, National University of Singapore, Singapore, Singapore
| | - Alex Mogilner
- Courant Institute and Department of Biology, New York University, New York, USA
| | - Alexander D Bershadsky
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore.
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel.
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28
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Galli A, Moretti S, Dule N, Di Cairano ES, Castagna M, Marciani P, Battaglia C, Bertuzzi F, Fiorina P, Pastore I, La Rosa S, Davalli A, Folli F, Perego C. Hyperglycemia impairs EAAT2 glutamate transporter trafficking and glutamate clearance in islets of Langerhans: implications for type 2 diabetes pathogenesis and treatment. Am J Physiol Endocrinol Metab 2024; 327:E27-E41. [PMID: 38690938 PMCID: PMC11390119 DOI: 10.1152/ajpendo.00069.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 04/18/2024] [Accepted: 04/21/2024] [Indexed: 05/03/2024]
Abstract
Pancreatic endocrine cells employ a sophisticated system of paracrine and autocrine signals to synchronize their activities, including glutamate, which controls hormone release and β-cell viability by acting on glutamate receptors expressed by endocrine cells. We here investigate whether alteration of the excitatory amino acid transporter 2 (EAAT2), the major glutamate clearance system in the islet, may occur in type 2 diabetes mellitus and contribute to β-cell dysfunction. Increased EAAT2 intracellular localization was evident in islets of Langerhans from T2DM subjects as compared with healthy control subjects, despite similar expression levels. Chronic treatment of islets from healthy donors with high-glucose concentrations led to the transporter internalization in vesicular compartments and reduced [H3]-d-glutamate uptake (65 ± 5% inhibition), phenocopying the findings in T2DM pancreatic sections. The transporter relocalization was associated with decreased Akt phosphorylation protein levels, suggesting an involvement of the phosphoinositide 3-kinase (PI3K)/Akt pathway in the process. In line with this, PI3K inhibition by a 100-µM LY294002 treatment in human and clonal β-cells caused the transporter relocalization in intracellular compartments and significantly reduced the glutamate uptake compared to control conditions, suggesting that hyperglycemia changes the trafficking of the transporter to the plasma membrane. Upregulation of the glutamate transporter upon treatment with the antibiotic ceftriaxone rescued hyperglycemia-induced β-cells dysfunction and death. Our data underscore the significance of EAAT2 in regulating islet physiology and provide a rationale for potential therapeutic targeting of this transporter to preserve β-cell survival and function in diabetes.NEW & NOTEWORTHY The glutamate transporter SLC1A2/excitatory amino acid transporter 2 (EAAT2) is expressed on the plasma membrane of pancreatic β-cells and controls islet glutamate clearance and β-cells survival. We found that the EAAT2 membrane expression is lost in the islets of Langerhans from type 2 diabetes mellitus (T2DM) patients due to hyperglycemia-induced downregulation of the phosphoinositide 3-kinase/Akt pathway and modification of its intracellular trafficking. Pharmacological rescue of EAAT2 expression prevents β-cell dysfunction and death, suggesting EAAT2 as a new potential target of intervention in T2DM.
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Affiliation(s)
- Alessandra Galli
- Laboratory of Molecular and Cellular Physiology, Department of Excellence of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Stefania Moretti
- Laboratory of Molecular and Cellular Physiology, Department of Excellence of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Nevia Dule
- Laboratory of Molecular and Cellular Physiology, Department of Excellence of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Eliana Sara Di Cairano
- Laboratory of Molecular and Cellular Physiology, Department of Excellence of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Michela Castagna
- Laboratory of Molecular and Cellular Physiology, Department of Excellence of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Paola Marciani
- Laboratory of Molecular and Cellular Physiology, Department of Excellence of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Cristina Battaglia
- Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, Milan, Italy
| | | | - Paolo Fiorina
- Department of Biomedical and Clinical Sciences "L. Sacco,"Università degli Studi di Milano, Milan, Italy
- Endocrinology Unit, ASST Fatebenefratelli-Sacco, Milan, Italy
| | - Ida Pastore
- Endocrinology Unit, ASST Fatebenefratelli-Sacco, Milan, Italy
| | - Stefano La Rosa
- Unit of Pathology, Department of Oncology, ASST Sette Laghi, Varese, Italy
- Department of Medicine and Technological Innovation, Università degli Studi dell'Insubria, Varese, Italy
| | - Alberto Davalli
- Diabetes and Endocrinology Unit, Department of Internal Medicine, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Franco Folli
- Department of Health Sciences, Università degli Studi di Milano, Milan, Italy
| | - Carla Perego
- Laboratory of Molecular and Cellular Physiology, Department of Excellence of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
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29
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Bannunah A, Cavanagh R, Shubber S, Vllasaliu D, Stolnik S. Difference in Endocytosis Pathways Used by Differentiated Versus Nondifferentiated Epithelial Caco-2 Cells to Internalize Nanosized Particles. Mol Pharm 2024; 21:3603-3612. [PMID: 38864426 PMCID: PMC11220748 DOI: 10.1021/acs.molpharmaceut.4c00333] [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: 03/28/2024] [Revised: 06/07/2024] [Accepted: 06/07/2024] [Indexed: 06/13/2024]
Abstract
Understanding the internalization of nanosized particles by mucosal epithelial cells is essential in a number of areas including viral entry at mucosal surfaces, nanoplastic pollution, as well as design and development of nanotechnology-type medicines. Here, we report our comparative study on pathways of cellular internalization in epithelial Caco-2 cells cultured in vitro as either a polarized, differentiated cell layer or as nonpolarized, nondifferentiated cells. The study reveals a number of differences in the extent that endocytic processes are used by cells, depending on their differentiation status and the nature of applied nanoparticles. In polarized cells, actin-driven and dynamin-independent macropinocytosis plays a prominent role in the internalization of both positively and negatively charged nanoparticles, contrary to its modest contribution in nonpolarized cells. Clathrin-mediated cellular entry plays a prominent role in the endocytosis of positive nanoparticles and cholesterol inhibition in negative nanoparticles. However, in nonpolarized cells, dynamin-dependent endocytosis is a major pathway in the internalization of both positive and negative nanoparticles. Cholesterol depletion affects both nonpolarized and polarized cells' internalization of positive and negative nanoparticles, which, in addition to the effect of cholesterol-binding inhibitors on the internalization of negative nanoparticles, indicates the importance of membrane cholesterol in endocytosis. The data collectively provide a new contribution to understanding endocytic pathways in epithelial cells, particularly pointing to the importance of the cell differentiation stage and the nature of the cargo.
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Affiliation(s)
- Azzah Bannunah
- School
of Pharmacy, University of Nottingham, University Park, Nottingham NG7 2RD, U.K.
| | - Robert Cavanagh
- School
of Pharmacy, University of Nottingham, University Park, Nottingham NG7 2RD, U.K.
| | - Saif Shubber
- School
of Pharmacy, University of Nottingham, University Park, Nottingham NG7 2RD, U.K.
| | - Driton Vllasaliu
- School
of Cancer & Pharmaceutical Sciences, Faculty of Life Sciences
& Medicine, King’s College London,
Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, U.K.
| | - Snow Stolnik
- School
of Pharmacy, University of Nottingham, University Park, Nottingham NG7 2RD, U.K.
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Vondrak CJ, Sit B, Suwanbongkot C, Macaluso KR, Lamason RL. A conserved interaction between the effector Sca4 and host endocytic machinery suggests additional roles for Sca4 during rickettsial infection. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.24.600492. [PMID: 38979345 PMCID: PMC11230260 DOI: 10.1101/2024.06.24.600492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Intracellular bacterial pathogens deploy secreted effector proteins that manipulate diverse host machinery and pathways to promote infection. Although many effectors carry out a single specific function or interaction, there are a growing number of secreted pathogen effectors capable of interacting with multiple host factors. However, few effectors secreted by obligate intracellular Rickettsia species have been linked to multiple host targets. Here, we investigated the conserved rickettsial secreted effector Sca4, which was previously shown to interact with host vinculin to promote cell-to-cell spread in the model Rickettsia species R. parkeri . We discovered that Sca4 also binds the host cell endocytic factor clathrin heavy chain (CHC, CLTC ) via a conserved segment in the Sca4 N-terminus. Ablation of CLTC expression or chemical inhibition of endocytosis reduced R. parkeri cell-to-cell spread, indicating that clathrin promotes efficient spread between mammalian cells. This activity was independent of Sca4 and appeared restricted to the recipient host cell, suggesting that the Sca4-clathrin interaction also regulates another aspect of the infectious lifecycle. Indeed, R. parkeri lacking Sca4 or expressing a Sca4 truncation unable to bind clathrin had markedly reduced burdens in tick cells, hinting at a cell-type specific function for the Sca4-clathrin interaction. Sca4 homologs from diverse Rickettsia species also bound clathrin, suggesting that the function of this novel effector-host interaction may be broadly important for rickettsial infection. We conclude that Sca4 has multiple targets during infection and that rickettsiae may manipulate host endocytic machinery to facilitate several stages of their life cycles.
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Byrne AB, Bonnin FA, López EL, Polack FP, Talarico LB. C1q modulation of antibody-dependent enhancement of dengue virus infection in human myeloid cell lines is dependent on cell type and antibody specificity. Microbes Infect 2024:105378. [PMID: 38880233 DOI: 10.1016/j.micinf.2024.105378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 05/28/2024] [Accepted: 06/10/2024] [Indexed: 06/18/2024]
Abstract
Antibody-dependent enhancement (ADE) of dengue virus (DENV) infection is one of the mechanisms contributing to increased severity during heterotypic, secondary infection. The complement protein C1q has been shown to reduce the magnitude of ADE in vitro. Therefore, we investigated the mechanisms of C1q modulation of ADE, focusing on processes of viral entry. Using a model of ADE of DENV-1 infection in human myeloid cell lines in the presence of monoclonal antibodies, 4G2 and 2H2, we found that C1q produced nearly a 40-fold reduction of ADE of DENV-1 in K562 cells, but had no effect in U937 cells. In K562 cells, C1q reduced adsorption of DENV-1/4G2 and exerted a dual inhibitory effect on adsorption and internalization of DENV-1/2H2. Distinct endocytic pathways in the presence of antibody corresponded to conditions where C1q produced a differential action. Also, C1q did not affect the intrinsic cell response mediated by FcγR in human myeloid cells. The modulation of ADE of DENV-1 by C1q is dependent on the FcγR expressed on immune cells and the specificity of the antibody comprising the immune complex. Understanding protective and pathogenic mechanisms in the humoral response to DENV infections is crucial for the successful design of antivirals and vaccines.
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Affiliation(s)
- Alana B Byrne
- Laboratorio de Investigaciones Infectológicas y Biología Molecular, Infectología, Departamento de Medicina, Hospital de Niños Dr. Ricardo Gutiérrez, Gallo 1330, Buenos Aires 1425, Argentina; Fundación INFANT, Gavilán 94, Buenos Aires 1406, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Godoy Cruz 2290, Buenos Aires 1425, Argentina.
| | - Florencia A Bonnin
- Laboratorio de Investigaciones Infectológicas y Biología Molecular, Infectología, Departamento de Medicina, Hospital de Niños Dr. Ricardo Gutiérrez, Gallo 1330, Buenos Aires 1425, Argentina; Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Biológica, Intendente Güiraldes 2160, Buenos Aires 1428, Argentina
| | - Eduardo L López
- Departamento de Medicina, Programa de Infectología Pediátrica, Hospital de Niños Dr. Ricardo Gutiérrez, Universidad de Buenos Aires, Gallo 1330, Buenos Aires 1425, Argentina
| | | | - Laura B Talarico
- Laboratorio de Investigaciones Infectológicas y Biología Molecular, Infectología, Departamento de Medicina, Hospital de Niños Dr. Ricardo Gutiérrez, Gallo 1330, Buenos Aires 1425, Argentina; Fundación INFANT, Gavilán 94, Buenos Aires 1406, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Godoy Cruz 2290, Buenos Aires 1425, Argentina.
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Mahapatra S, Takahashi T. Physiological roles of endocytosis and presynaptic scaffold in vesicle replenishment at fast and slow central synapses. eLife 2024; 12:RP90497. [PMID: 38829367 PMCID: PMC11147502 DOI: 10.7554/elife.90497] [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] [Indexed: 06/05/2024] Open
Abstract
After exocytosis, release sites are cleared of vesicular residues to replenish with transmitter-filled vesicles. Endocytic and scaffold proteins are thought to underlie this site-clearance mechanism. However, the physiological significance of this mechanism at diverse mammalian central synapses remains unknown. Here, we tested this in a physiologically optimized condition using action potential evoked EPSCs at fast calyx synapse and relatively slow hippocampal CA1 synapse, in post-hearing mice brain slices at 37°C and in 1.3 mM [Ca2+]. Pharmacological block of endocytosis enhanced synaptic depression at the calyx synapse, whereas it attenuated synaptic facilitation at the hippocampal synapse. Block of scaffold protein activity likewise enhanced synaptic depression at the calyx but had no effect at the hippocampal synapse. At the fast calyx synapse, block of endocytosis or scaffold protein activity significantly enhanced synaptic depression as early as 10 ms after the stimulation onset. Unlike previous reports, neither endocytic blockers nor scaffold protein inhibitors prolonged the recovery from short-term depression. We conclude that the release-site clearance by endocytosis can be a universal phenomenon supporting vesicle replenishment at both fast and slow synapses, whereas the presynaptic scaffold mechanism likely plays a specialized role in vesicle replenishment predominantly at fast synapses.
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Affiliation(s)
- Satyajit Mahapatra
- Cellular and Molecular Synaptic Function Unit, Okinawa Institute of Science and Technology - Graduate UniversityOkinawaJapan
| | - Tomoyuki Takahashi
- Cellular and Molecular Synaptic Function Unit, Okinawa Institute of Science and Technology - Graduate UniversityOkinawaJapan
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Wildner F, Neuhäusel TS, Klemz A, Kovács R, Ulmann L, Geiger JRP, Gerevich Z. Extracellular ATP inhibits excitatory synaptic input on parvalbumin positive interneurons and attenuates gamma oscillations via P2X4 receptors. Br J Pharmacol 2024; 181:1635-1653. [PMID: 38073073 DOI: 10.1111/bph.16298] [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: 08/24/2023] [Revised: 11/13/2023] [Accepted: 11/16/2023] [Indexed: 02/02/2024] Open
Abstract
BACKGROUND AND PURPOSE P2X4 receptors (P2X4R) are ligand gated cation channels that are activated by extracellular ATP released by neurons and glia. The receptors are widely expressed in the brain and have fractional calcium currents comparable with NMDA receptors. Although P2X4Rs have been reported to modulate synaptic transmission and plasticity, their involvement in shaping neuronal network activity remains to be elucidated. EXPERIMENTAL APPROACH We investigated the effects of P2X receptors at network and synaptic level using local field potential electrophysiology, whole cell patch clamp recordings and calcium imaging in fast spiking parvalbumin positive interneurons (PVINs) in rat and mouse hippocampal slices. The stable ATP analogue ATPγS, selective antagonists and P2X4R knockout mice were used. KEY RESULTS The P2XR agonist ATPγS reversibly decreased the power of gamma oscillations. This inhibition could be antagonized by the selective P2X4R antagonist PSB-12062 and was not observed in P2X4-/- mice. The phasic excitatory inputs of CA3 PVINs were one of the main regulators of the gamma power. Associational fibre compound excitatory postsynaptic currents (cEPSCs) in CA3 PVINs were inhibited by P2X4R activation. This effect was reversible, dependent on intracellular calcium and dynamin-dependent internalization of AMPA receptors. CONCLUSIONS AND IMPLICATIONS The results indicate that P2X4Rs are an important source of dendritic calcium in CA3 PVINs, thereby regulating excitatory synaptic inputs onto the cells and presumably the state of gamma oscillations in the hippocampus. P2X4Rs represent an effective target to modulate hippocampal network activity in pathophysiological conditions such as Alzheimer's disease and schizophrenia.
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Affiliation(s)
- Florian Wildner
- Institute of Neurophysiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Tim S Neuhäusel
- Institute of Neurophysiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Alexander Klemz
- Institute of Neurophysiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Richard Kovács
- Institute of Neurophysiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Lauriane Ulmann
- IGF, University of Montpellier, CNRS, INSERM, Montpellier, France
| | - Jörg R P Geiger
- Institute of Neurophysiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Zoltan Gerevich
- Institute of Neurophysiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
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Bernardoni BL, D'Agostino I, La Motta C, Angeli A. An insight into the last 5-year patents on Porphyromonas gingivalis and Streptococcus mutans, the pivotal pathogens in the oral cavity. Expert Opin Ther Pat 2024; 34:433-463. [PMID: 38684444 DOI: 10.1080/13543776.2024.2349739] [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: 11/08/2023] [Accepted: 04/26/2024] [Indexed: 05/02/2024]
Abstract
INTRODUCTION The oral cavity harbors an extensive array of over 700 microorganisms, forming the most complex biome of the entire human body, with bacterial species being the most abundant. Oral diseases, e.g. periodontitis and caries, are strictly associated with bacterial dysbiosis. Porphyromonas gingivalis and Streptococcus mutans stand out among bacteria colonizing the oral cavity. AREAS COVERED After a brief overview of the bacterial populations in the oral cavity and their roles in regulating (flora) oral cavity or causing diseases like periodontal and cariogenic pathogens, we focused our attention on P. gingivalis and S. mutans, searching for the last-5-year patents dealing with the proposal of new strategies to fight their infections. Following the PRISMA protocol, we filtered the results and analyzed over 100 applied/granted patents, to provide an in-depth insight into this R&D scenario. EXPERT OPINION Several antibacterial proposals have been patented in this period, from both chemical - peptides and small molecules - and biological - probiotics and antibodies - sources, along with natural extracts, polymers, and drug delivery systems. Most of the inventors are from China and Korea and their studies also investigated anti-inflammatory and antioxidant effects, being beneficial to oral health through a prophylactic, protective, or curative effect.
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Affiliation(s)
| | | | | | - Andrea Angeli
- Neurofarba Department, University of Florence, Florence, Italy
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Yang S, Golkaram M, Oh S, Oh Y, Cho Y, Yoe J, Ju S, Lalli MA, Park SY, Lee Y, Jang J. ETV4 is a mechanical transducer linking cell crowding dynamics to lineage specification. Nat Cell Biol 2024; 26:903-916. [PMID: 38702503 PMCID: PMC11178500 DOI: 10.1038/s41556-024-01415-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 04/03/2024] [Indexed: 05/06/2024]
Abstract
Dynamic changes in mechanical microenvironments, such as cell crowding, regulate lineage fates as well as cell proliferation. Although regulatory mechanisms for contact inhibition of proliferation have been extensively studied, it remains unclear how cell crowding induces lineage specification. Here we found that a well-known oncogene, ETS variant transcription factor 4 (ETV4), serves as a molecular transducer that links mechanical microenvironments and gene expression. In a growing epithelium of human embryonic stem cells, cell crowding dynamics is translated into ETV4 expression, serving as a pre-pattern for future lineage fates. A switch-like ETV4 inactivation by cell crowding derepresses the potential for neuroectoderm differentiation in human embryonic stem cell epithelia. Mechanistically, cell crowding inactivates the integrin-actomyosin pathway and blocks the endocytosis of fibroblast growth factor receptors (FGFRs). The disrupted FGFR endocytosis induces a marked decrease in ETV4 protein stability through ERK inactivation. Mathematical modelling demonstrates that the dynamics of cell density in a growing human embryonic stem cell epithelium precisely determines the spatiotemporal ETV4 expression pattern and, consequently, the timing and geometry of lineage development. Our findings suggest that cell crowding dynamics in a stem cell epithelium drives spatiotemporal lineage specification using ETV4 as a key mechanical transducer.
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Affiliation(s)
- Seungbok Yang
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Mahdi Golkaram
- Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, CA, USA
| | - Seyoun Oh
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Yujeong Oh
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Yoonjae Cho
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Jeehyun Yoe
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Sungeun Ju
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Matthew A Lalli
- Seaver Autism Center for Research and Treatment at Mount Sinai, New York, NY, USA
| | - Seung-Yeol Park
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Yoontae Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Jiwon Jang
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea.
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Huang C, Liu YC, Oh H, Guo DS, Nau WM, Hennig A. Cellular Uptake of Cell-Penetrating Peptides Activated by Amphiphilic p-Sulfonatocalix[4]arenes. Chemistry 2024; 30:e202400174. [PMID: 38456376 DOI: 10.1002/chem.202400174] [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: 01/15/2024] [Revised: 03/05/2024] [Accepted: 03/08/2024] [Indexed: 03/09/2024]
Abstract
We report the synthesis of a series of amphiphilic p-sulfonatocalix[4]arenes with varying alkyl chain lengths (CX4-Cn) and their application as efficient counterion activators for membrane transport of cell-penetrating peptides (CPPs). The enhanced membrane activity is confirmed with the carboxyfluorescein (CF) assay in vesicles and by the direct cytosolic delivery of CPPs into CHO-K1, HCT 116, and KTC-1 cells enabling excellent cellular uptake of the CPPs into two cancer cell lines. Intracellular delivery was confirmed by fluorescence microscopy after CPP entry into live cells mediated by CX4-Cn, which was also quantified after cell lysis by fluorescence spectroscopy. The results present the first systematic exploration of structure-activity relationships for calixarene-based counterion activators and show that CX4-Cn are exceptionally effective in cellular delivery of CPPs. The dodecyl derivative, CX4-C12, serves as best activator. A first mechanistic insight is provided by efficient CPP uptake at 4 °C and in the presence of the endocytosis inhibitor dynasore, which indicates a direct translocation of the CPP-counterion complexes into the cytosol and highlights the potential benefits of CX4-Cn for efficient and direct translocation of CPPs and CPP-conjugated cargo molecules into the cytosol of live cells.
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Affiliation(s)
- Chusen Huang
- School of Science, Constructor University, Campus Ring 1, 28759, Bremen, Germany
- The Education Ministry Key Laboratory of Resource Chemistry, Department of Chemistry, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, China
| | - Yan-Cen Liu
- School of Science, Constructor University, Campus Ring 1, 28759, Bremen, Germany
| | - Hyeyoung Oh
- School of Science, Constructor University, Campus Ring 1, 28759, Bremen, Germany
| | - Dong-Sheng Guo
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Functional Polymer Materials, Ministry of Education, Nankai University, Tianjin, 300071, China
| | - Werner M Nau
- School of Science, Constructor University, Campus Ring 1, 28759, Bremen, Germany
| | - Andreas Hennig
- School of Science, Constructor University, Campus Ring 1, 28759, Bremen, Germany
- Center for Cellular Nanoanalytics (CellNanOs) and Department of Biology and Chemistry, Universität Osnabrück, Barbarastraße 7, 49069, Osnabrück, Germany
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Plum MTW, Cheung HC, Iscar PR, Chen Y, Gan YH, Basler M. Burkholderia thailandensis uses a type VI secretion system to lyse protrusions without triggering host cell responses. Cell Host Microbe 2024; 32:676-692.e5. [PMID: 38640929 DOI: 10.1016/j.chom.2024.03.013] [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: 03/01/2023] [Revised: 08/01/2023] [Accepted: 03/27/2024] [Indexed: 04/21/2024]
Abstract
To spread within a host, intracellular Burkholderia form actin tails to generate membrane protrusions into neighboring host cells and use type VI secretion system-5 (T6SS-5) to induce cell-cell fusions. Here, we show that B. thailandensis also uses T6SS-5 to lyse protrusions to directly spread from cell to cell. Dynamin-2 recruitment to the membrane near a bacterium was followed by a short burst of T6SS-5 activity. This resulted in the polymerization of the actin of the newly invaded host cell and disruption of the protrusion membrane. Most protrusion lysis events were dependent on dynamin activity, caused no cell-cell fusion, and failed to be recognized by galectin-3. T6SS-5 inactivation decreased protrusion lysis but increased galectin-3, LC3, and LAMP1 accumulation in host cells. Our results indicate that B. thailandensis specifically activates T6SS-5 assembly in membrane protrusions to disrupt host cell membranes and spread without alerting cellular responses, such as autophagy.
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Affiliation(s)
| | - Hoi Ching Cheung
- Biozentrum, University of Basel, Spitalstrasse 41, 4056 Basel, Switzerland
| | | | - Yahua Chen
- Department of Biochemistry, National University of Singapore, 8 Medical Drive, Singapore 117596, Singapore
| | - Yunn-Hwen Gan
- Department of Biochemistry, National University of Singapore, 8 Medical Drive, Singapore 117596, Singapore
| | - Marek Basler
- Biozentrum, University of Basel, Spitalstrasse 41, 4056 Basel, Switzerland.
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Jo SI, Kim S, Lim JM, Rhee SG, Jeong BG, Cha SS, Chang JB, Kang D. Control of the signaling role of PtdIns(4)P at the plasma membrane through H 2O 2-dependent inactivation of synaptojanin 2 during endocytosis. Redox Biol 2024; 71:103097. [PMID: 38442648 PMCID: PMC10924134 DOI: 10.1016/j.redox.2024.103097] [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: 12/03/2023] [Revised: 02/16/2024] [Accepted: 02/18/2024] [Indexed: 03/07/2024] Open
Abstract
Phosphatidylinositol 4,5-bisphosphate [PtdIns(4,5)P2] is implicated in various processes, including hormone-induced signal transduction, endocytosis, and exocytosis in the plasma membrane. However, how H2O2 accumulation regulates the levels of PtdIns(4,5)P2 in the plasma membrane in cells stimulated with epidermal growth factors (EGFs) is not known. We show that a plasma membrane PtdIns(4,5)P2-degrading enzyme, synaptojanin (Synj) phosphatase, is inactivated through oxidation by H2O2. Intriguingly, H2O2 inhibits the 4-phosphatase activity of Synj but not the 5-phosphatase activity. In EGF-activated cells, the oxidation of Synj dual phosphatase is required for the transient increase in the plasma membrane levels of phosphatidylinositol 4-phosphate [PtdIns(4)P], which can control EGF receptor-mediated endocytosis. These results indicate that intracellular H2O2 molecules act as signaling mediators to fine-tune endocytosis by controlling the stability of plasma membrane PtdIns(4)P, an intermediate product of Synj phosphoinositide dual phosphatase.
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Affiliation(s)
- Su In Jo
- Department of Life Science, Ewha Womans University, Seoul, Republic of Korea
| | - Suree Kim
- Fluorescence Core Imaging Center and Bioimaging Data Curation Center, Ewha Womans University, Seoul, Republic of Korea
| | - Jung Mi Lim
- Biochemistry and Biophysics Center, NHLBI, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Sue Goo Rhee
- Biochemistry and Biophysics Center, NHLBI, National Institutes of Health, Bethesda, MD, 20892, USA
| | | | - Sun-Shin Cha
- R&D Division, TODD PHARM CO. LTD., Seoul, Republic of Korea; Department of Chemistry & Nanoscience, Ewha Womans University, Seoul, Republic of Korea
| | - Jae-Byum Chang
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Dongmin Kang
- Department of Life Science, Ewha Womans University, Seoul, Republic of Korea; Fluorescence Core Imaging Center and Bioimaging Data Curation Center, Ewha Womans University, Seoul, Republic of Korea.
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Sava I, Davis LJ, Gray SR, Bright NA, Luzio JP. Reversible assembly and disassembly of V-ATPase during the lysosome regeneration cycle. Mol Biol Cell 2024; 35:ar63. [PMID: 38446621 PMCID: PMC11151095 DOI: 10.1091/mbc.e23-08-0322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 02/23/2024] [Accepted: 03/01/2024] [Indexed: 03/08/2024] Open
Abstract
Regulation of the luminal pH of late endocytic compartments in continuously fed mammalian cells is poorly understood. Using normal rat kidney fibroblasts, we investigated the reversible assembly/disassembly of the proton pumping V-ATPase when endolysosomes are formed by kissing and fusion of late endosomes with lysosomes and during the subsequent reformation of lysosomes. We took advantage of previous work showing that sucrosomes formed by the uptake of sucrose are swollen endolysosomes from which lysosomes are reformed after uptake of invertase. Using confocal microscopy and subcellular fractionation of NRK cells stably expressing fluorescently tagged proteins, we found net recruitment of the V1 subcomplex during sucrosome formation and loss during lysosome reformation, with a similar time course to RAB7a loss. Addition of invertase did not alter mTORC1 signalling, suggesting that the regulation of reversible V-ATPase assembly/disassembly in continuously fed cells differs from that in cells subject to amino acid depletion/refeeding. Using live cell microscopy, we demonstrated recruitment of a fluorescently tagged V1 subunit during endolysosome formation and a dynamic equilibrium and rapid exchange between the cytosolic and membrane bound pools of this subunit. We conclude that reversible V-ATPase assembly/disassembly plays a key role in regulating endolysosomal/lysosomal pH in continuously fed cells.
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Affiliation(s)
- Ioana Sava
- Cambridge Institute for Medical Research (CIMR) and Department of Clinical Biochemistry, University of Cambridge School of Clinical Medicine, The Keith Peters Building, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0XY, UK
| | - Luther J. Davis
- Cambridge Institute for Medical Research (CIMR) and Department of Clinical Biochemistry, University of Cambridge School of Clinical Medicine, The Keith Peters Building, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0XY, UK
| | - Sally R. Gray
- Cambridge Institute for Medical Research (CIMR) and Department of Clinical Biochemistry, University of Cambridge School of Clinical Medicine, The Keith Peters Building, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0XY, UK
| | - Nicholas A. Bright
- Cambridge Institute for Medical Research (CIMR) and Department of Clinical Biochemistry, University of Cambridge School of Clinical Medicine, The Keith Peters Building, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0XY, UK
| | - J. Paul Luzio
- Cambridge Institute for Medical Research (CIMR) and Department of Clinical Biochemistry, University of Cambridge School of Clinical Medicine, The Keith Peters Building, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0XY, UK
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Shan M, Wan H, Ran L, Ye J, Xie W, Lu J, Hu X, Deng S, Zhang W, Chen M, Wang F, Guo Z. Dynasore Alleviates LPS-Induced Acute Lung Injury by Inhibiting NLRP3 Inflammasome-Mediated Pyroptosis. Drug Des Devel Ther 2024; 18:1369-1384. [PMID: 38681210 PMCID: PMC11055558 DOI: 10.2147/dddt.s444408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 04/12/2024] [Indexed: 05/01/2024] Open
Abstract
Background Acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) are clinically severe respiratory disorders without available pharmacological therapies. Dynasore is a cell-permeable molecule that inhibits GTPase activity and exerts protective effects in several disease models. However, whether dynasore can alleviate lipopolysaccharide (LPS)-induced ALI is unknown. This study investigated the effect of dynasore on macrophage activation and explored its potential mechanisms in LPS-induced ALI in vitro and in vivo. Methods Bone marrow-derived macrophages (BMDMs) were activated classically with LPS or subjected to NLRP3 inflammasome activation with LPS+ATP. A mouse ALI model was established by the intratracheal instillation (i.t.) of LPS. The expression of PYD domains-containing protein 3 (NLRP3), caspase-1, and gasdermin D (GSDMD) protein was detected by Western blots. Inflammatory mediators were analyzed in the cell supernatant, in serum and bronchoalveolar lavage fluid (BALF) by enzyme-linked immunosorbent assays. Morphological changes in lung tissues were evaluated by hematoxylin and eosin staining. F4/80, Caspase-1 and GSDMD distribution in lung tissue was detected by immunofluorescence. Results Dynasore downregulated nuclear factor (NF)-κB signaling and reduced proinflammatory cytokine production in vitro and inhibited the production and release of interleukin (IL)-1β, NLRP3 inflammasome activation, and macrophage pyroptosis through the Drp1/ROS/NLRP3 axis. Dynasore significantly reduced lung injury scores and proinflammatory cytokine levels in both BALF and serum in vivo, including IL-1β and IL-6. Dynasore also downregulated the co-expression of F4/80, caspase-1 and GSDMD in lung tissue. Conclusion Collectively, these findings demonstrated that dynasore could alleviate LPS-induced ALI by regulating macrophage pyroptosis, which might provide a new therapeutic strategy for ALI/ARDS.
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Affiliation(s)
- Mengtian Shan
- Department of Pulmonary and Critical Care Medicine, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
| | - Huimin Wan
- Department of Pulmonary and Critical Care Medicine, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
| | - Linyu Ran
- Department of Pulmonary and Critical Care Medicine, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
| | - Jihui Ye
- Department of Pulmonary and Critical Care Medicine, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
| | - Wang Xie
- Department of Respiratory Medicine, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, People’s Republic of China
| | - Jingjing Lu
- Department of Pulmonary and Critical Care Medicine, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
| | - Xueping Hu
- Department of Pulmonary and Critical Care Medicine, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
| | - Shengjie Deng
- Department of Pulmonary and Critical Care Medicine, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
| | - Wenyu Zhang
- Department of Pulmonary and Critical Care Medicine, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
| | - Miao Chen
- Department of Emergency, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan, People’s Republic of China
| | - Feilong Wang
- Department of Pulmonary and Critical Care Medicine, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
| | - Zhongliang Guo
- Department of Pulmonary and Critical Care Medicine, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
- Department of Respiratory Medicine, Ji’an Hospital, Shanghai East Hospital, Shanghai, Jiangxi, People’s Republic of China
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Liu Y, Yang D, Jiang W, Chi T, Kang J, Wang Z, Wu F. Cell entry of bovine respiratory syncytial virus through clathrin-mediated endocytosis is regulated by PI3K-Akt and Src-JNK pathways. Front Microbiol 2024; 15:1393127. [PMID: 38690369 PMCID: PMC11059085 DOI: 10.3389/fmicb.2024.1393127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 04/05/2024] [Indexed: 05/02/2024] Open
Abstract
Bovine respiratory syncytial virus (BRSV) is an RNA virus with envelope that causes acute, febrile, and highly infectious respiratory diseases in cattle. However, the manner and mechanism of BRSV entry into cells remain unclear. In this study, we aimed to explore the entry manner of BRSV into MDBK cells and its regulatory mechanism. Our findings, based on virus titer, virus copies, western blot and IFA analysis, indicate that BRSV enters MDBK cells through endocytosis, relying on dynamin, specifically via clathrin-mediated endocytosis rather than caveolin-mediated endocytosis and micropinocytosis. We observed that the entered BRSV initially localizes in early endosomes and subsequently localizes in late endosomes. Additionally, our results of western blot, virus titer and virus copies demonstrate that BRSV entry through clathrin-mediated endocytosis is regulated by PI3K-Akt and Src-JNK signaling pathways. Overall, our study suggests that BRSV enters MDBK cells through clathrin-mediated endocytosis, entered BRSV is trafficked to late endosome via early endosome, BRSV entry through clathrin-mediated endocytosis is regulated by PI3K-Akt and Src-JNK signaling pathways.
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Affiliation(s)
- Yang Liu
- Key Laboratory of Animal Biosafety Risk Prevention and Control of Ministry of Agriculture and Rural Affairs (South), China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Dongliang Yang
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, Gansu, China
| | - Wen Jiang
- Key Laboratory of Animal Biosafety Risk Prevention and Control of Ministry of Agriculture and Rural Affairs (South), China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Tianying Chi
- Key Laboratory of Animal Biosafety Risk Prevention and Control of Ministry of Agriculture and Rural Affairs (South), China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Jingli Kang
- Key Laboratory of Animal Biosafety Risk Prevention and Control of Ministry of Agriculture and Rural Affairs (South), China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Zhiliang Wang
- Key Laboratory of Animal Biosafety Risk Prevention and Control of Ministry of Agriculture and Rural Affairs (South), China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Faxing Wu
- Key Laboratory of Animal Biosafety Risk Prevention and Control of Ministry of Agriculture and Rural Affairs (South), China Animal Health and Epidemiology Center, Qingdao, Shandong, China
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42
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Han X, Li D, Zhu Y, Schneider-Futschik EK. Recommended Tool Compounds for Modifying the Cystic Fibrosis Transmembrane Conductance Regulator Channel Variants. ACS Pharmacol Transl Sci 2024; 7:933-950. [PMID: 38633590 PMCID: PMC11019735 DOI: 10.1021/acsptsci.3c00362] [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: 12/14/2023] [Revised: 02/20/2024] [Accepted: 02/23/2024] [Indexed: 04/19/2024]
Abstract
Cystic fibrosis (CF) is a genetic disorder arising from variations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene, leading to multiple organ system defects. CFTR tool compounds are molecules that can modify the activity of the CFTR channel. Especially, patients that are currently not able to benefit from approved CFTR modulators, such as patients with rare CFTR variants, benefit from further research in discovering novel tools to modulate CFTR. This Review explores the development and classification of CFTR tool compounds, including CFTR blockers (CFTRinh-172, GlyH-101), potentiators (VRT-532, Genistein), correctors (VRT-325, Corr-4a), and other approved and unapproved modulators, with detailed descriptions and discussions for each compound. The challenges and future directions in targeting rare variants and optimizing drug delivery, and the potential synergistic effects in combination therapies are outlined. CFTR modulation holds promise not only for CF treatment but also for generating CF models that contribute to CF research and potentially treating other diseases such as secretory diarrhea. Therefore, continued research on CFTR tool compounds is critical.
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Affiliation(s)
- XiaoXuan Han
- Department of Biochemistry & Pharmacology,
School of Biomedical Sciences, Faculty of Medicine, Dentistry and
Health Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Danni Li
- Department of Biochemistry & Pharmacology,
School of Biomedical Sciences, Faculty of Medicine, Dentistry and
Health Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Yimin Zhu
- Department of Biochemistry & Pharmacology,
School of Biomedical Sciences, Faculty of Medicine, Dentistry and
Health Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Elena K. Schneider-Futschik
- Department of Biochemistry & Pharmacology,
School of Biomedical Sciences, Faculty of Medicine, Dentistry and
Health Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
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43
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Read ML, Brookes K, Zha L, Manivannan S, Kim J, Kocbiyik M, Fletcher A, Gorvin CM, Firth G, Fruhwirth GO, Nicola JP, Jhiang S, Ringel MD, Campbell MJ, Sunassee K, Blower PJ, Boelaert K, Nieto HR, Smith VE, McCabe CJ. Combined Vorinostat and Chloroquine Inhibit Sodium-Iodide Symporter Endocytosis and Enhance Radionuclide Uptake In Vivo. Clin Cancer Res 2024; 30:1352-1366. [PMID: 37921808 PMCID: PMC7615786 DOI: 10.1158/1078-0432.ccr-23-2043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 09/12/2023] [Accepted: 11/01/2023] [Indexed: 11/04/2023]
Abstract
PURPOSE Patients with aggressive thyroid cancer are frequently failed by the central therapy of ablative radioiodide (RAI) uptake, due to reduced plasma membrane (PM) localization of the sodium/iodide symporter (NIS). We aimed to understand how NIS is endocytosed away from the PM of human thyroid cancer cells, and whether this was druggable in vivo. EXPERIMENTAL DESIGN Informed by analysis of endocytic gene expression in patients with aggressive thyroid cancer, we used mutagenesis, NanoBiT interaction assays, cell surface biotinylation assays, RAI uptake, and NanoBRET to understand the mechanisms of NIS endocytosis in transformed cell lines and patient-derived human primary thyroid cells. Systemic drug responses were monitored via 99mTc pertechnetate gamma counting and gene expression in BALB/c mice. RESULTS We identified an acidic dipeptide within the NIS C-terminus that mediates binding to the σ2 subunit of the Adaptor Protein 2 (AP2) heterotetramer. We discovered that the FDA-approved drug chloroquine (CQ) modulates NIS accumulation at the PM in a functional manner that is AP2 dependent. In vivo, CQ treatment of BALB/c mice significantly enhanced thyroidal uptake of 99mTc pertechnetate in combination with the histone deacetylase (HDAC) inhibitor vorinostat/SAHA, accompanied by increased thyroidal NIS mRNA. Bioinformatic analyses validated the clinical relevance of AP2 genes with disease-free survival in RAI-treated DTC, enabling construction of an AP2 gene-related risk score classifier for predicting recurrence. CONCLUSIONS NIS internalization is specifically druggable in vivo. Our data, therefore, provide new translatable potential for improving RAI therapy using FDA-approved drugs in patients with aggressive thyroid cancer. See related commentary by Lechner and Brent, p. 1220.
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Affiliation(s)
- Martin L. Read
- Institute of Metabolism and Systems Research (IMSR), and Centre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Birmingham, UK
| | - Katie Brookes
- Institute of Metabolism and Systems Research (IMSR), and Centre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Birmingham, UK
| | - Ling Zha
- Institute of Metabolism and Systems Research (IMSR), and Centre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Birmingham, UK
| | - Selvambigai Manivannan
- Institute of Metabolism and Systems Research (IMSR), and Centre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Birmingham, UK
| | - Jana Kim
- School of Biomedical Engineering & Imaging Sciences, King’s College London, London, UK
| | - Merve Kocbiyik
- Institute of Metabolism and Systems Research (IMSR), and Centre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Birmingham, UK
| | - Alice Fletcher
- Institute of Metabolism and Systems Research (IMSR), and Centre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Birmingham, UK
| | - Caroline M. Gorvin
- Institute of Metabolism and Systems Research (IMSR), and Centre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Birmingham, UK
| | - George Firth
- School of Biomedical Engineering & Imaging Sciences, King’s College London, London, UK
| | - Gilbert O. Fruhwirth
- Comprehensive Cancer Centre, School of Cancer and Pharmaceutical Sciences, King's College London, Guy's Campus, London, UK
| | - Juan P. Nicola
- Departamento de Bioquímica Clínica (CIBICI-CONICET), Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Sissy Jhiang
- Divison of Endocrinology, Diabetes, and Metabolism and Cancer Biology Program, The Ohio State University College of Medicine and Comprehensive Cancer Center, Columbus, Ohio, USA
| | - Matthew D. Ringel
- Divison of Endocrinology, Diabetes, and Metabolism and Cancer Biology Program, The Ohio State University College of Medicine and Comprehensive Cancer Center, Columbus, Ohio, USA
| | - Moray J. Campbell
- Department of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy at The Ohio State University, Columbus, Ohio, USA
| | - Kavitha Sunassee
- School of Biomedical Engineering & Imaging Sciences, King’s College London, London, UK
| | - Philip J. Blower
- School of Biomedical Engineering & Imaging Sciences, King’s College London, London, UK
| | - Kristien Boelaert
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Hannah R. Nieto
- Institute of Metabolism and Systems Research (IMSR), and Centre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Birmingham, UK
| | - Vicki E. Smith
- Institute of Metabolism and Systems Research (IMSR), and Centre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Birmingham, UK
| | - Christopher J. McCabe
- Institute of Metabolism and Systems Research (IMSR), and Centre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Birmingham, UK
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Johnson D, Colijn S, Richee J, Yano J, Burns M, Davis AE, Pham VN, Saric A, Jain A, Yin Y, Castranova D, Melani M, Fujita M, Grainger S, Bonifacino JS, Weinstein BM, Stratman AN. Regulation of angiogenesis by endocytic trafficking mediated by cytoplasmic dynein 1 light intermediate chain 1. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.01.587559. [PMID: 38903077 PMCID: PMC11188074 DOI: 10.1101/2024.04.01.587559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
Dynein cytoplasmic 1 light intermediate chain 1 (LIC1, DYNC1LI1) is a core subunit of the dynein motor complex. The LIC1 subunit also interacts with various cargo adaptors to regulate Rab-mediated endosomal recycling and lysosomal degradation. Defects in this gene are predicted to alter dynein motor function, Rab binding capabilities, and cytoplasmic cargo trafficking. Here, we have identified a dync1li1 zebrafish mutant, harboring a premature stop codon at the exon 12/13 splice acceptor site, that displays increased angiogenesis. In vitro, LIC1-deficient human endothelial cells display increases in cell surface levels of the pro-angiogenic receptor VEGFR2, SRC phosphorylation, and Rab11-mediated endosomal recycling. In vivo, endothelial-specific expression of constitutively active Rab11a leads to excessive angiogenesis, similar to the dync1li1 mutants. Increased angiogenesis is also evident in zebrafish harboring mutations in rilpl1/2, the adaptor proteins that promote Rab docking to Lic1 to mediate lysosomal targeting. These findings suggest that LIC1 and the Rab-adaptor proteins RILPL1 and 2 restrict angiogenesis by promoting degradation of VEGFR2-containing recycling endosomes. Disruption of LIC1- and RILPL1/2-mediated lysosomal targeting increases Rab11-mediated recycling endosome activity, promoting excessive SRC signaling and angiogenesis.
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Affiliation(s)
- Dymonn Johnson
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110
| | - Sarah Colijn
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110
| | - Jahmiera Richee
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110
| | - Joseph Yano
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
- Cell and Molecular Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Margaret Burns
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Andrew E. Davis
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Van N. Pham
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Amra Saric
- Section on Intracellular Protein Trafficking, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
- Neurosciences and Mental Health Program, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, M5G 0A4, Canada
| | - Akansha Jain
- Section on Intracellular Protein Trafficking, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Ying Yin
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110
| | - Daniel Castranova
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Mariana Melani
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
- Fundación Instituto Leloir, Buenos Aires, Argentina
- Consejo Nacional De Investigaciones Científicas Y Técnicas (CONICET), Buenos Aires, Argentina
- Departamento De Fisiología, Biología Molecular Y Celular, Facultad De Ciencias Exactas Y Naturales, Universidad De Buenos Aires, Buenos Aires, Argentina
| | - Misato Fujita
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
- Kanagawa University, Kanagawa, 221-8686, Japan
| | - Stephanie Grainger
- Department of Cell Biology, Van Andel Institute, Grand Rapids, MI, 49503
| | - Juan S. Bonifacino
- Section on Intracellular Protein Trafficking, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Brant M. Weinstein
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Amber N. Stratman
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110
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Isanta B, Delgado A, Ciudad CJ, Busquets MA, Griera R, Llor N, Noé V. Synthesis and Validation of TRIFAPYs as a Family of Transfection Agents for Therapeutic Oligonucleotides. Biomolecules 2024; 14:390. [PMID: 38672408 PMCID: PMC11048556 DOI: 10.3390/biom14040390] [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: 02/14/2024] [Revised: 03/15/2024] [Accepted: 03/21/2024] [Indexed: 04/28/2024] Open
Abstract
Transfection agents play a crucial role in facilitating the uptake of nucleic acids into eukaryotic cells offering potential therapeutic solutions for genetic disorders. However, progress in this field needs the development of improved systems that guarantee efficient transfection. Here, we describe the synthesis of a set of chemical delivery agents (TRIFAPYs) containing alkyl chains of different lengths based on the 1,3,5-tris[(4-alkyloxy-1pyridinio)methyl]benzene tribromide structure. Their delivery properties for therapeutic oligonucleotides were evaluated using PolyPurine Reverse Hoogsteen hairpins (PPRHs) as a silencing tool. The binding of liposomes to PPRHs was evaluated by retardation assays in agarose gels. The complexes had a size of 125 nm as determined by DLS, forming well-defined concentrical vesicles as visualized by Cryo-TEM. The prostate cancer cell line PC-3 was used to study the internalization of the nanoparticles by fluorescence microscopy and flow cytometry. The mechanism of entrance involved in the cellular uptake was mainly by clathrin-mediated endocytosis. Cytotoxicity analyses determined the intrinsic toxicity caused by each TRIFAPY and the effect on cell viability upon transfection of a specific PPRH (HpsPr-C) directed against the antiapoptotic target survivin. TRIFAPYs C12-C18 were selected to expand these studies in the breast cancer cell line SKBR-3 opening the usage of TRIFAPYs for both sexes and, in the hCMEC/D3 cell line, as a model for the blood-brain barrier. The mRNA levels of survivin decreased, while apoptosis levels increased upon the transfection of HpsPr-C with these TRIFAPYs in PC-3 cells. Therefore, TRIFAPYs can be considered novel lipid-based vehicles for the delivery of therapeutic oligonucleotides.
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Affiliation(s)
- Berta Isanta
- Department of Pharmacology, Toxicology and Therapeutic Chemistry, School of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain; (B.I.); (R.G.); (N.L.)
| | - Ana Delgado
- Department of Biochemistry and Physiology, School of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain;
| | - Carlos J. Ciudad
- Department of Biochemistry and Physiology, School of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain;
- Nanoscience and Nanotechnology Institute, IN2UB, University of Barcelona, 08028 Barcelona, Spain;
| | - Mª Antònia Busquets
- Nanoscience and Nanotechnology Institute, IN2UB, University of Barcelona, 08028 Barcelona, Spain;
- Department of Pharmacy and Pharmaceutical Technology and Physical Chemistry, School of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain
| | - Rosa Griera
- Department of Pharmacology, Toxicology and Therapeutic Chemistry, School of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain; (B.I.); (R.G.); (N.L.)
- Nanoscience and Nanotechnology Institute, IN2UB, University of Barcelona, 08028 Barcelona, Spain;
| | - Núria Llor
- Department of Pharmacology, Toxicology and Therapeutic Chemistry, School of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain; (B.I.); (R.G.); (N.L.)
- Nanoscience and Nanotechnology Institute, IN2UB, University of Barcelona, 08028 Barcelona, Spain;
| | - Véronique Noé
- Department of Biochemistry and Physiology, School of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain;
- Nanoscience and Nanotechnology Institute, IN2UB, University of Barcelona, 08028 Barcelona, Spain;
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46
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Hendricks EL, Liebl FLW. The CHD family chromatin remodeling enzyme, Kismet, promotes both clathrin-mediated and activity-dependent bulk endocytosis. PLoS One 2024; 19:e0300255. [PMID: 38512854 PMCID: PMC10956772 DOI: 10.1371/journal.pone.0300255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 02/23/2024] [Indexed: 03/23/2024] Open
Abstract
Chromodomain helicase DNA binding domain (CHD) proteins, including CHD7 and CHD8, remodel chromatin to enable transcriptional programs. Both proteins are important for proper neural development as heterozygous mutations in Chd7 and Chd8 are causative for CHARGE syndrome and correlated with autism spectrum disorders, respectively. Their roles in mature neurons are poorly understood despite influencing the expression of genes required for cell adhesion, neurotransmission, and synaptic plasticity. The Drosophila homolog of CHD7 and CHD8, Kismet (Kis), promotes neurotransmission, endocytosis, and larval locomotion. Endocytosis is essential in neurons for replenishing synaptic vesicles, maintaining protein localization, and preserving the size and composition of the presynaptic membrane. Several forms of endocytosis have been identified including clathrin-mediated endocytosis, which is coupled with neural activity and is the most prevalent form of synaptic endocytosis, and activity-dependent bulk endocytosis, which occurs during periods of intense stimulation. Kis modulates the expression of gene products involved in endocytosis including promoting shaggy/GSK3β expression while restricting PI3K92E. kis mutants electrophysiologically phenocopy a liquid facets mutant in response to paradigms that induce clathrin-mediated endocytosis and activity-dependent bulk endocytosis. Further, kis mutants do not show further reductions in endocytosis when activity-dependent bulk endocytosis or clathrin-mediated endocytosis are pharmacologically inhibited. We find that Kis is important in postsynaptic muscle for proper endocytosis but the ATPase domain of Kis is dispensable for endocytosis. Collectively, our data indicate that Kis promotes both clathrin-mediated endocytosis and activity-dependent bulk endocytosis possibly by promoting transcription of several endocytic genes and maintaining the size of the synaptic vesicle pool.
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Affiliation(s)
- Emily L. Hendricks
- Department of Biological Sciences, Southern Illinois University Edwardsville, Edwardsville, Illinois, United States of America
| | - Faith L. W. Liebl
- Department of Biological Sciences, Southern Illinois University Edwardsville, Edwardsville, Illinois, United States of America
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Oevel K, Hohensee S, Kumar A, Rosas-Brugada I, Bartolini F, Soykan T, Haucke V. Rho GTPase signaling and mDia facilitate endocytosis via presynaptic actin. eLife 2024; 12:RP92755. [PMID: 38502163 PMCID: PMC10950329 DOI: 10.7554/elife.92755] [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] [Indexed: 03/20/2024] Open
Abstract
Neurotransmission at synapses is mediated by the fusion and subsequent endocytosis of synaptic vesicle membranes. Actin has been suggested to be required for presynaptic endocytosis but the mechanisms that control actin polymerization and its mode of action within presynaptic nerve terminals remain poorly understood. We combine optical recordings of presynaptic membrane dynamics and ultrastructural analysis with genetic and pharmacological manipulations to demonstrate that presynaptic endocytosis is controlled by actin regulatory diaphanous-related formins mDia1/3 and Rho family GTPase signaling in mouse hippocampal neurons. We show that impaired presynaptic actin assembly in the near absence of mDia1/3 and reduced RhoA activity is partly compensated by hyperactivation of Rac1. Inhibition of Rac1 signaling further aggravates impaired presynaptic endocytosis elicited by loss of mDia1/3. Our data suggest that interdependent mDia1/3-Rho and Rac1 signaling pathways cooperatively act to facilitate synaptic vesicle endocytosis by controlling presynaptic F-actin.
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Affiliation(s)
- Kristine Oevel
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)BerlinGermany
| | - Svea Hohensee
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)BerlinGermany
| | - Atul Kumar
- Department of Pathology and Cell Biology, Columbia University Medical CenterNew York CityUnited States
| | | | - Francesca Bartolini
- Department of Pathology and Cell Biology, Columbia University Medical CenterNew York CityUnited States
| | - Tolga Soykan
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)BerlinGermany
| | - Volker Haucke
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)BerlinGermany
- Faculty of Biology, Chemistry, Pharmacy, Freie Universität BerlinBerlinGermany
- NeuroCure Cluster of Excellence, Charité Universitätsmedizin BerlinBerlinGermany
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Ye H, Yang Q, Guo H, Wang X, Cheng L, Han B, Hong M, Ma F, Li M, Wu X, Chen F, Zhu J, Chen S, Zheng S, Li J. Internalisation of neutrophils extracellular traps by macrophages aggravate rheumatoid arthritis via Rab5a. RMD Open 2024; 10:e003847. [PMID: 38485453 PMCID: PMC10941157 DOI: 10.1136/rmdopen-2023-003847] [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: 10/25/2023] [Accepted: 02/22/2024] [Indexed: 03/17/2024] Open
Abstract
OBJECTIVES Although elevated levels of neutrophil extracellular traps (NETs) have been reported in patients with rheumatoid arthritis (RA), the role of NETs in RA and the relationship between NETs and macrophages in the pathogenesis of RA requires further research. Here, we sought to determine the role of NETs in RA pathogenesis and reveal the potential mechanism. METHODS Neutrophil elastase (NE) and myeloperoxidase (MPO)-DNA were measured in human serum and synovium. NETs inhibitor GSK484 was used to examine whether NETs involved with RA progression. We stimulated macrophages with NETs and detected internalisation-related proteins to investigate whether NETs entry into macrophages and induced inflammatory cytokines secretion through internalisation. To reveal mechanisms mediating NETs-induced inflammation aggravation, we silenced GTPases involved in internalisation and inflammatory pathways in vivo and in vitro and detected downstream inflammatory pathways. RESULTS Serum and synovium from patients with RA showed a significant increase in NE and MPO, which positively correlated to disease activity. Inhibiting NETs formation alleviated the collagen-induced arthritis severity. In vitro, NETs are internalised by macrophages and located in early endosomes. Rab 5a was identified as the key mediator of the NETs internalisation and inflammatory cytokines secretion. Rab 5a knockout mice exhibited arthritis alleviation. Moreover, we found that NE contained in NETs activated the Rab5a-nuclear factor kappa B (NF-κB) signal pathway and promoted the inflammatory cytokines secretion in macrophages. CONCLUSIONS This study demonstrated that NETs-induced macrophages inflammation to aggravate RA in Rab 5a dependent manner. Mechanically, Rab5a mediated internalisation of NETs by macrophages and NE contained in NETs promoted macrophages inflammatory cytokines secretion through NF-κB-light-chain-enhancer of activated B cells signal pathway. Therapeutic targeting Rab 5a or NE might extend novel strategies to minimise inflammation in RA.
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Affiliation(s)
- Haixin Ye
- Department of Rheumatology and Immunology, Nanfang Hospital,Southern Medical University, Guangzhou, Guangdong, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Qian Yang
- Department of Rheumatology and Immunology, Nanfang Hospital,Southern Medical University, Guangzhou, Guangdong, China
| | - Huaxia Guo
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Xing Wang
- Department of Rheumatology and Immunology, Nanfang Hospital,Southern Medical University, Guangzhou, Guangdong, China
| | - Lifang Cheng
- Department of Rheumatology and Immunology, Nanfang Hospital,Southern Medical University, Guangzhou, Guangdong, China
| | - Bingqi Han
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Mukeng Hong
- Department of Rheumatology and Immunology, Nanfang Hospital,Southern Medical University, Guangzhou, Guangdong, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Fopei Ma
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Meng Li
- Department of Rheumatology and Immunology, Nanfang Hospital,Southern Medical University, Guangzhou, Guangdong, China
| | - Xianghui Wu
- Laboratory Animal Research Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Feilong Chen
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Junqing Zhu
- Department of Rheumatology and Immunology, Nanfang Hospital,Southern Medical University, Guangzhou, Guangdong, China
| | - Shixian Chen
- Department of Rheumatology and Immunology, Nanfang Hospital,Southern Medical University, Guangzhou, Guangdong, China
| | - Songyuan Zheng
- Department of Rheumatology and Immunology, Nanfang Hospital,Southern Medical University, Guangzhou, Guangdong, China
| | - Juan Li
- Department of Rheumatology and Immunology, Nanfang Hospital,Southern Medical University, Guangzhou, Guangdong, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
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49
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Drolia R, Bryant DB, Tenguria S, Jules-Culver ZA, Thind J, Amelunke B, Liu D, Gallina NLF, Mishra KK, Samaddar M, Sawale MR, Mishra DK, Cox AD, Bhunia AK. Listeria adhesion protein orchestrates caveolae-mediated apical junctional remodeling of epithelial barrier for Listeria monocytogenes translocation. mBio 2024; 15:e0282123. [PMID: 38376160 PMCID: PMC10936185 DOI: 10.1128/mbio.02821-23] [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: 10/16/2023] [Accepted: 01/09/2024] [Indexed: 02/21/2024] Open
Abstract
The cellular junctional architecture remodeling by Listeria adhesion protein-heat shock protein 60 (LAP-Hsp60) interaction for Listeria monocytogenes (Lm) passage through the epithelial barrier is incompletely understood. Here, using the gerbil model, permissive to internalin (Inl) A/B-mediated pathways like in humans, we demonstrate that Lm crosses the intestinal villi at 48 h post-infection. In contrast, the single isogenic (lap- or ΔinlA) or double (lap-ΔinlA) mutant strains show significant defects. LAP promotes Lm translocation via endocytosis of cell-cell junctional complex in enterocytes that do not display luminal E-cadherin. In comparison, InlA facilitates Lm translocation at cells displaying apical E-cadherin during cell extrusion and mucus expulsion from goblet cells. LAP hijacks caveolar endocytosis to traffic integral junctional proteins to the early and recycling endosomes. Pharmacological inhibition in a cell line and genetic knockout of caveolin-1 in mice prevents LAP-induced intestinal permeability, junctional endocytosis, and Lm translocation. Furthermore, LAP-Hsp60-dependent tight junction remodeling is also necessary for InlA access to E-cadherin for Lm intestinal barrier crossing in InlA-permissive hosts. IMPORTANCE Listeria monocytogenes (Lm) is a foodborne pathogen with high mortality (20%-30%) and hospitalization rates (94%), particularly affecting vulnerable groups such as pregnant women, fetuses, newborns, seniors, and immunocompromised individuals. Invasive listeriosis involves Lm's internalin (InlA) protein binding to E-cadherin to breach the intestinal barrier. However, non-functional InlA variants have been identified in Lm isolates, suggesting InlA-independent pathways for translocation. Our study reveals that Listeria adhesion protein (LAP) and InlA cooperatively assist Lm entry into the gut lamina propria in a gerbil model, mimicking human listeriosis in early infection stages. LAP triggers caveolin-1-mediated endocytosis of critical junctional proteins, transporting them to early and recycling endosomes, facilitating Lm passage through enterocytes. Furthermore, LAP-Hsp60-mediated junctional protein endocytosis precedes InlA's interaction with basolateral E-cadherin, emphasizing LAP and InlA's cooperation in enhancing Lm intestinal translocation. This understanding is vital in combating the severe consequences of Lm infection, including sepsis, meningitis, encephalitis, and brain abscess.
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Affiliation(s)
- Rishi Drolia
- Department of Food Science, Molecular Food Microbiology Laboratory, Purdue University, West Lafayette, Indiana, USA
- Department of Biological Science, Old Dominion University, Norfolk, Virginia, USA
- Department of Biological Science, Eastern Kentucky University, Richmond, Kentucky, USA
- Purdue Institute of Inflammation, Immunology, and Infectious Disease, Purdue University, West Lafayette, Indiana, USA
| | - Donald B. Bryant
- Department of Biological Science, Eastern Kentucky University, Richmond, Kentucky, USA
| | - Shivendra Tenguria
- Department of Food Science, Molecular Food Microbiology Laboratory, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute of Inflammation, Immunology, and Infectious Disease, Purdue University, West Lafayette, Indiana, USA
| | - Zuri A. Jules-Culver
- Department of Biological Science, Old Dominion University, Norfolk, Virginia, USA
| | - Jessie Thind
- Department of Biological Science, Eastern Kentucky University, Richmond, Kentucky, USA
| | - Breanna Amelunke
- Department of Biological Science, Eastern Kentucky University, Richmond, Kentucky, USA
| | - Dongqi Liu
- Department of Food Science, Molecular Food Microbiology Laboratory, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute of Inflammation, Immunology, and Infectious Disease, Purdue University, West Lafayette, Indiana, USA
| | - Nicholas L. F. Gallina
- Department of Food Science, Molecular Food Microbiology Laboratory, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute of Inflammation, Immunology, and Infectious Disease, Purdue University, West Lafayette, Indiana, USA
| | - Krishna K. Mishra
- Department of Food Science, Molecular Food Microbiology Laboratory, Purdue University, West Lafayette, Indiana, USA
| | - Manalee Samaddar
- Department of Food Science, Molecular Food Microbiology Laboratory, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute of Inflammation, Immunology, and Infectious Disease, Purdue University, West Lafayette, Indiana, USA
| | - Manoj R. Sawale
- Department of Food Science, Molecular Food Microbiology Laboratory, Purdue University, West Lafayette, Indiana, USA
| | - Dharmendra K. Mishra
- Department of Food Science, Molecular Food Microbiology Laboratory, Purdue University, West Lafayette, Indiana, USA
| | - Abigail D. Cox
- Department of Comparative Pathobiology, Purdue University, West Lafayette, Indiana, USA
| | - Arun K. Bhunia
- Department of Food Science, Molecular Food Microbiology Laboratory, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute of Inflammation, Immunology, and Infectious Disease, Purdue University, West Lafayette, Indiana, USA
- Department of Comparative Pathobiology, Purdue University, West Lafayette, Indiana, USA
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50
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Sakurai C, Yamashita N, Azuma K, Hatsuzawa K. VAMP5 promotes Fcγ receptor-mediated phagocytosis and regulates phagosome maturation in macrophages. Mol Biol Cell 2024; 35:ar44. [PMID: 38265888 PMCID: PMC10916865 DOI: 10.1091/mbc.e23-04-0149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 01/12/2024] [Accepted: 01/18/2024] [Indexed: 01/26/2024] Open
Abstract
Phagosome formation and maturation reportedly occur via sequential membrane fusion events mediated by synaptosomal-associated protein of 23 kDa (SNAP23), a plasma membrane-localized soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) family. Vesicle-associated membrane protein 5 (VAMP5), also a plasmalemma SNARE, interacts with SNAP23; however, its precise function in phagocytosis in macrophages remains elusive. To elucidate this aspect, we investigated the characteristics of macrophages in the presence of VAMP5 overexpression or knockdown and found that VAMP5 participates in Fcγ receptor-mediated phagosome formation, although not directly in phagosome maturation. Overexpressed VAMP5 was localized to the early phagosomal membrane but no longer localized to the lysosomal-associated membrane protein 1-positive maturing phagosomal membrane. Analyses using compound-based selective inhibitors demonstrated that VAMP5 dissociation from early phagosomes occurs in a clathrin- and dynamin-dependent manner and is indispensable for SNAP23 function in subsequent membrane fusion during phagosome maturation. Accordingly, to the best of our knowledge, we demonstrate, for the first time, that VAMP5 exerts an immunologically critical function during phagosome formation and maturation via SNARE-based membrane trafficking in macrophages.
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Affiliation(s)
- Chiye Sakurai
- Division of Molecular Biology, School of Life Sciences, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8503, Japan
| | - Natsumi Yamashita
- Division of Molecular Biology, School of Life Sciences, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8503, Japan
| | - Kento Azuma
- Division of Molecular Biology, School of Life Sciences, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8503, Japan
| | - Kiyotaka Hatsuzawa
- Division of Molecular Biology, School of Life Sciences, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8503, Japan
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