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Sosne G, Berger EA. Thymosin beta 4: A potential novel adjunct treatment for bacterial keratitis. Int Immunopharmacol 2023; 118:109953. [PMID: 37018981 PMCID: PMC10403815 DOI: 10.1016/j.intimp.2023.109953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 04/05/2023]
Abstract
Microbial keratitis is a rapidly progressing, visually debilitating infection of the cornea that can lead to corneal scarring, endophthalmitis, and perforation. Corneal opacification or scarring, a complication of keratitis, is among the leading causes of legal blindness worldwide, second to cataracts.Pseudomonas aeruginosaandStaphylococcus aureusare the two bacteria most commonly associated with this type of infection. Risk factors include patients who are immunocompromised, those who have undergone refractive corneal surgery, and those with prior penetrating keratoplasty, as well as extended wear contact lens users. Current treatment of microbial keratitis primarily addresses the pathogen using antibiotics. Bacterial clearance is of utmost importance yet does not guarantee good visual outcome. Clinicians are often left to rely upon the eye's innate ability to heal itself, as there are limited options beyond antibiotics and corticosteroids for treating patients with corneal infection. Beyond antibiotics, agents in use, such as lubricating ointments, artificial tears, and anti-inflammatory drops, do not fully accommodate clinical needs and have many potential harmful complications. To this end, treatments are needed that both regulate the inflammatory response and promote corneal wound healing to resolve visual disturbances and improve quality of life. Thymosin beta 4 is a small, naturally occurring 43-amino-acid protein that promotes wound healing and reduces corneal inflammation and is currently in Phase 3 human clinical trials for dry eye disease. Our previous work has shown that topical Tβ4 as an adjunct to ciprofloxacin treatment reduces inflammatory mediators and inflammatory cell infiltrates (neutrophils/PMN and macrophages) while enhancing bacterial killing and wound healing pathway activation in an experimental model ofP. aeruginosa-induced keratitis. Adjunctive thymosin beta 4 treatment holds novel therapeutic potential to regulate and, optimally, resolve disease pathogenesis in the cornea and perhaps other infectious and immune-based inflammatory disease. We plan to establish the importance of thymosin beta 4 as a therapeutic agent in conjunction with antibiotics with high impact for immediate clinical development.
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Affiliation(s)
- Gabriel Sosne
- Department of Ophthalmology, Visual & Anatomical Sciences, Kresge Eye Institute, Wayne State University School of Medicine, 4717 St. Antoine, Detroit, MI 48201, USA.
| | - Elizabeth A Berger
- Department of Ophthalmology, Visual & Anatomical Sciences, Wayne State University School of Medicine, Detroit, MI 48201, USA.
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Caterino M, Fedele R, Carnovale V, Castaldo A, Gelzo M, Iacotucci P, Ruoppolo M, Castaldo G. Lipidomic alterations in human saliva from cystic fibrosis patients. Sci Rep 2023; 13:600. [PMID: 36635275 PMCID: PMC9837121 DOI: 10.1038/s41598-022-24429-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 11/15/2022] [Indexed: 01/14/2023] Open
Abstract
Cystic fibrosis is a hereditary metabolic disorder characterized by impaired traffic of chloride ions and water through membranes of the respiratory and gastrointestinal, that causes inadequate hydration of airway surfaces, dehydrated mucous secretions and a high-sodium chloride sweat. Although the classical presentation of the condition is well known, a better characterization of metabolic alterations related is need. In particular, the metabolic composition alterations of biological fluids may be influence by the disease state and could be captured as putative signature to set targeted therapeutic strategies. A targeted comprehensive mass spectrometry-based platform was employed to dissect the lipid content of saliva samples form CF patients, in order to investigate alterations in the lipid metabolic homeostasis related to the pathology, chronic obstructive pulmonary disease, Pseudomonas Aeruginosa infection, pancreatic insufficiency, liver disfunction and diabetes-related complications.
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Affiliation(s)
- Marianna Caterino
- grid.4691.a0000 0001 0790 385XDepartment of Molecular Medicine and Medical Biotechnology, School of Medicine, University of Naples Federico II, 80131 Naples, Italy ,grid.511947.f0000 0004 1758 0953CEINGE - Biotecnologie Avanzate F. Salvatore, s.c.ar.l, 80145 Napoli, Italy
| | - Roberta Fedele
- grid.511947.f0000 0004 1758 0953CEINGE - Biotecnologie Avanzate F. Salvatore, s.c.ar.l, 80145 Napoli, Italy
| | - Vincenzo Carnovale
- grid.4691.a0000 0001 0790 385XDepartment of Translational Medical Sciences, University of Naples Federico II, Naples, Italy
| | - Alice Castaldo
- grid.4691.a0000 0001 0790 385XDepartment of Translational Medical Sciences, University of Naples Federico II, Naples, Italy
| | - Monica Gelzo
- grid.4691.a0000 0001 0790 385XDepartment of Molecular Medicine and Medical Biotechnology, School of Medicine, University of Naples Federico II, 80131 Naples, Italy ,grid.511947.f0000 0004 1758 0953CEINGE - Biotecnologie Avanzate F. Salvatore, s.c.ar.l, 80145 Napoli, Italy
| | - Paola Iacotucci
- grid.4691.a0000 0001 0790 385XDepartment of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | - Margherita Ruoppolo
- Department of Molecular Medicine and Medical Biotechnology, School of Medicine, University of Naples Federico II, 80131, Naples, Italy. .,CEINGE - Biotecnologie Avanzate F. Salvatore, s.c.ar.l, 80145, Napoli, Italy.
| | - Giuseppe Castaldo
- grid.4691.a0000 0001 0790 385XDepartment of Molecular Medicine and Medical Biotechnology, School of Medicine, University of Naples Federico II, 80131 Naples, Italy ,grid.511947.f0000 0004 1758 0953CEINGE - Biotecnologie Avanzate F. Salvatore, s.c.ar.l, 80145 Napoli, Italy
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Song B, Zheng Y, Chi H, Zhu Y, Cui Z, Chen L, Chen G, Gao B, Du Y, Yu Z, Song B. Revealing the roles of glycosphingolipid metabolism pathway in the development of keloid: a conjoint analysis of single-cell and machine learning. Front Immunol 2023; 14:1139775. [PMID: 37168863 PMCID: PMC10164993 DOI: 10.3389/fimmu.2023.1139775] [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: 01/07/2023] [Accepted: 04/04/2023] [Indexed: 05/13/2023] Open
Abstract
Keloid is a pathological scar formed by abnormal wound healing, characterized by the persistence of local inflammation and excessive collagen deposition, where the intensity of inflammation is positively correlated with the size of the scar formation. The pathophysiological mechanisms underlying keloid formation are unclear, and keloid remains a therapeutic challenge in clinical practice. This study is the first to investigate the role of glycosphingolipid (GSL) metabolism pathway in the development of keloid. Single cell sequencing and microarray data were applied to systematically analyze and screen the glycosphingolipid metabolism related genes using differential gene analysis and machine learning algorithms (random forest and support vector machine), and a set of genes, including ARSA,GBA2,SUMF2,GLTP,GALC and HEXB, were finally identified, for which keloid diagnostic model was constructed and immune infiltration profiles were analyzed, demonstrating that this set of genes could serve as a new therapeutic target for keloid. Further unsupervised clustering was performed by using expression profiles of glycosphingolipid metabolism genes to discover keloid subgroups, immune cells, inflammatory factor differences and the main pathways of enrichment between different subgroups were calculated. The single-cell resolution transcriptome landscape concentrated on fibroblasts. By calculating the activity of the GSL metabolism pathway for each fibroblast, we investigated the activity changes of GSL metabolism pathway in fibroblasts using pseudotime trajectory analysis and found that the increased activity of the GSL metabolism pathway was associated with fibroblast differentiation. Subsequent analysis of the cellular communication network revealed the existence of a fibroblast-centered communication regulatory network in keloids and that the activity of the GSL metabolism pathway in fibroblasts has an impact on cellular communication. This contributes to the further understanding of the pathogenesis of keloids. Overall, we provide new insights into the pathophysiological mechanisms of keloids, and our results may provide new ideas for the diagnosis and treatment of keloids.
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Affiliation(s)
- Binyu Song
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Yu Zheng
- Hospital for Skin Disease (Institute of Dermatology), Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China
| | - Hao Chi
- Clinical Medical College, Southwest Medical University, Luzhou, China
| | - Yuhan Zhu
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Zhiwei Cui
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Lin Chen
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Guo Chen
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Botao Gao
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Yichen Du
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Zhou Yu
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
- *Correspondence: Zhou Yu, ; Baoqiang Song,
| | - Baoqiang Song
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
- *Correspondence: Zhou Yu, ; Baoqiang Song,
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Lunghi G, Carsana EV, Loberto N, Cioccarelli L, Prioni S, Mauri L, Bassi R, Duga S, Straniero L, Asselta R, Soldà G, Di Fonzo A, Frattini E, Magni M, Liessi N, Armirotti A, Ferrari E, Samarani M, Aureli M. β-Glucocerebrosidase Deficiency Activates an Aberrant Lysosome-Plasma Membrane Axis Responsible for the Onset of Neurodegeneration. Cells 2022; 11:cells11152343. [PMID: 35954187 PMCID: PMC9367513 DOI: 10.3390/cells11152343] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/25/2022] [Accepted: 07/27/2022] [Indexed: 02/06/2023] Open
Abstract
β-glucocerebrosidase is a lysosomal hydrolase involved in the catabolism of the sphingolipid glucosylceramide. Biallelic loss of function mutations in this enzyme are responsible for the onset of Gaucher disease, while monoallelic β-glucocerebrosidase mutations represent the first genetic risk factor for Parkinson’s disease. Despite this evidence, the molecular mechanism linking the impairment in β-glucocerebrosidase activity with the onset of neurodegeneration in still unknown. In this frame, we developed two in vitro neuronal models of β-glucocerebrosidase deficiency, represented by mouse cerebellar granule neurons and human-induced pluripotent stem cells-derived dopaminergic neurons treated with the specific β-glucocerebrosidase inhibitor conduritol B epoxide. Neurons deficient for β-glucocerebrosidase activity showed a lysosomal accumulation of glucosylceramide and the onset of neuronal damage. Moreover, we found that neurons react to the lysosomal impairment by the induction of their biogenesis and exocytosis. This latter event was responsible for glucosylceramide accumulation also at the plasma membrane level, with an alteration in lipid and protein composition of specific signaling microdomains. Collectively, our data suggest that β-glucocerebrosidase loss of function impairs the lysosomal compartment, establishing a lysosome–plasma membrane axis responsible for modifications in the plasma membrane architecture and possible alterations of intracellular signaling pathways, leading to neuronal damage.
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Affiliation(s)
- Giulia Lunghi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, 20054 Milan, Italy; (G.L.); (E.V.C.); (N.L.); (L.C.); (S.P.); (L.M.); (R.B.)
| | - Emma Veronica Carsana
- Department of Medical Biotechnology and Translational Medicine, University of Milan, 20054 Milan, Italy; (G.L.); (E.V.C.); (N.L.); (L.C.); (S.P.); (L.M.); (R.B.)
| | - Nicoletta Loberto
- Department of Medical Biotechnology and Translational Medicine, University of Milan, 20054 Milan, Italy; (G.L.); (E.V.C.); (N.L.); (L.C.); (S.P.); (L.M.); (R.B.)
| | - Laura Cioccarelli
- Department of Medical Biotechnology and Translational Medicine, University of Milan, 20054 Milan, Italy; (G.L.); (E.V.C.); (N.L.); (L.C.); (S.P.); (L.M.); (R.B.)
| | - Simona Prioni
- Department of Medical Biotechnology and Translational Medicine, University of Milan, 20054 Milan, Italy; (G.L.); (E.V.C.); (N.L.); (L.C.); (S.P.); (L.M.); (R.B.)
| | - Laura Mauri
- Department of Medical Biotechnology and Translational Medicine, University of Milan, 20054 Milan, Italy; (G.L.); (E.V.C.); (N.L.); (L.C.); (S.P.); (L.M.); (R.B.)
| | - Rosaria Bassi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, 20054 Milan, Italy; (G.L.); (E.V.C.); (N.L.); (L.C.); (S.P.); (L.M.); (R.B.)
| | - Stefano Duga
- Department of Biomedical Sciences, Humanitas University, 20090 Milan, Italy; (S.D.); (L.S.); (R.A.); (G.S.)
- Humanitas Clinical and Research Center—IRCCS, Via Manzoni 56, 20072 Milan, Italy
| | - Letizia Straniero
- Department of Biomedical Sciences, Humanitas University, 20090 Milan, Italy; (S.D.); (L.S.); (R.A.); (G.S.)
- Humanitas Clinical and Research Center—IRCCS, Via Manzoni 56, 20072 Milan, Italy
| | - Rosanna Asselta
- Department of Biomedical Sciences, Humanitas University, 20090 Milan, Italy; (S.D.); (L.S.); (R.A.); (G.S.)
- Humanitas Clinical and Research Center—IRCCS, Via Manzoni 56, 20072 Milan, Italy
| | - Giulia Soldà
- Department of Biomedical Sciences, Humanitas University, 20090 Milan, Italy; (S.D.); (L.S.); (R.A.); (G.S.)
- Humanitas Clinical and Research Center—IRCCS, Via Manzoni 56, 20072 Milan, Italy
| | - Alessio Di Fonzo
- IRCCS Foundation Ca’ Granda Ospedale Maggiore Policlinico, Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, 20122 Milan, Italy; (A.D.F.); (E.F.); (M.M.)
| | - Emanuele Frattini
- IRCCS Foundation Ca’ Granda Ospedale Maggiore Policlinico, Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, 20122 Milan, Italy; (A.D.F.); (E.F.); (M.M.)
| | - Manuela Magni
- IRCCS Foundation Ca’ Granda Ospedale Maggiore Policlinico, Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, 20122 Milan, Italy; (A.D.F.); (E.F.); (M.M.)
| | - Nara Liessi
- Analytical Chemistry Facility, Fondazione Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genoa, Italy; (N.L.); (A.A.)
| | - Andrea Armirotti
- Analytical Chemistry Facility, Fondazione Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genoa, Italy; (N.L.); (A.A.)
| | - Elena Ferrari
- Department of Pharmacological and Biomolecular Sciences, University of Milan, 20133 Milan, Italy;
| | - Maura Samarani
- Department of Cell Biology and Infection, Institut Pasteur, 75015 Paris, France;
| | - Massimo Aureli
- Department of Medical Biotechnology and Translational Medicine, University of Milan, 20054 Milan, Italy; (G.L.); (E.V.C.); (N.L.); (L.C.); (S.P.); (L.M.); (R.B.)
- Correspondence: ; Tel.: +39-025-033-0364
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Wang J, Chen YL, Li YK, Chen DK, He JF, Yao N. Functions of Sphingolipids in Pathogenesis During Host-Pathogen Interactions. Front Microbiol 2021; 12:701041. [PMID: 34408731 PMCID: PMC8366399 DOI: 10.3389/fmicb.2021.701041] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 06/21/2021] [Indexed: 12/23/2022] Open
Abstract
Sphingolipids are a class of membrane lipids that serve as vital structural and signaling bioactive molecules in organisms ranging from yeast to animals. Recent studies have emphasized the importance of sphingolipids as signaling molecules in the development and pathogenicity of microbial pathogens including bacteria, fungi, and viruses. In particular, sphingolipids play key roles in regulating the delicate balance between microbes and hosts during microbial pathogenesis. Some pathogens, such as bacteria and viruses, harness host sphingolipids to promote development and infection, whereas sphingolipids from both the host and pathogen are involved in fungus-host interactions. Moreover, a regulatory role for sphingolipids has been described, but their effects on host physiology and metabolism remain to be elucidated. Here, we summarize the current state of knowledge about the roles of sphingolipids in pathogenesis and interactions with host factors, including how sphingolipids modify pathogen and host metabolism with a focus on pathogenesis regulators and relevant metabolic enzymes. In addition, we discuss emerging perspectives on targeting sphingolipids that function in host-microbe interactions as new therapeutic strategies for infectious diseases.
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Affiliation(s)
- Jian Wang
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resource, School of Agriculture, Sun Yat-sen University, Guangzhou, China
| | - Yi-Li Chen
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resource, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yong-Kang Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resource, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Ding-Kang Chen
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resource, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Jia-Fan He
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resource, School of Agriculture, Sun Yat-sen University, Guangzhou, China
| | - Nan Yao
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resource, School of Agriculture, Sun Yat-sen University, Guangzhou, China
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resource, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
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Brandel A, Aigal S, Lagies S, Schlimpert M, Meléndez AV, Xu M, Lehmann A, Hummel D, Fisch D, Madl J, Eierhoff T, Kammerer B, Römer W. The Gb3-enriched CD59/flotillin plasma membrane domain regulates host cell invasion by Pseudomonas aeruginosa. Cell Mol Life Sci 2021; 78:3637-3656. [PMID: 33555391 PMCID: PMC8038999 DOI: 10.1007/s00018-021-03766-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 12/22/2020] [Accepted: 01/15/2021] [Indexed: 12/11/2022]
Abstract
The opportunistic pathogen Pseudomonas aeruginosa has gained precedence over the years due to its ability to develop resistance to existing antibiotics, thereby necessitating alternative strategies to understand and combat the bacterium. Our previous work identified the interaction between the bacterial lectin LecA and its host cell glycosphingolipid receptor globotriaosylceramide (Gb3) as a crucial step for the engulfment of P. aeruginosa via the lipid zipper mechanism. In this study, we define the LecA-associated host cell membrane domain by pull-down and mass spectrometry analysis. We unraveled a predilection of LecA for binding to saturated, long fatty acyl chain-containing Gb3 species in the extracellular membrane leaflet and an induction of dynamic phosphatidylinositol (3,4,5)-trisphosphate (PIP3) clusters at the intracellular leaflet co-localizing with sites of LecA binding. We found flotillins and the GPI-anchored protein CD59 not only to be an integral part of the LecA-interacting membrane domain, but also majorly influencing bacterial invasion as depletion of either of these host cell proteins resulted in about 50% reduced invasiveness of the P. aeruginosa strain PAO1. In summary, we report that the LecA-Gb3 interaction at the extracellular leaflet induces the formation of a plasma membrane domain enriched in saturated Gb3 species, CD59, PIP3 and flotillin thereby facilitating efficient uptake of PAO1.
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Affiliation(s)
- Annette Brandel
- Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg, Germany
- BIOSS, Centre for Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
- CIBSS, Centre for Integrative Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
| | - Sahaja Aigal
- Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg, Germany
- BIOSS, Centre for Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
- Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Simon Lagies
- Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg, Germany
- Center for Biological Systems Analysis, University of Freiburg, Habsburgerstraße 49, 79104, Freiburg, Germany
- Spemann Graduate School of Biology and Medicine, University of Freiburg, Albertstraße 19a, 79104, Freiburg, Germany
| | - Manuel Schlimpert
- Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg, Germany
- Center for Biological Systems Analysis, University of Freiburg, Habsburgerstraße 49, 79104, Freiburg, Germany
- Spemann Graduate School of Biology and Medicine, University of Freiburg, Albertstraße 19a, 79104, Freiburg, Germany
| | - Ana Valeria Meléndez
- Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg, Germany
- BIOSS, Centre for Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
- CIBSS, Centre for Integrative Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
- Spemann Graduate School of Biology and Medicine, University of Freiburg, Albertstraße 19a, 79104, Freiburg, Germany
| | - Maokai Xu
- Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg, Germany
- BIOSS, Centre for Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
- CIBSS, Centre for Integrative Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
| | - Anika Lehmann
- Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg, Germany
- BIOSS, Centre for Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
- CIBSS, Centre for Integrative Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
| | - Daniel Hummel
- Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg, Germany
- BIOSS, Centre for Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
- Department of Biochemistry, University of Geneva, 30 Quai Ernest-Ansermet, 1211, Geneva, Switzerland
| | - Daniel Fisch
- Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg, Germany
- BIOSS, Centre for Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
- Department of Infectious Disease, MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London, SW7 2AZ, UK
| | - Josef Madl
- Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg, Germany
- BIOSS, Centre for Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
- Institute for Experimental Cardiovascular Medicine, University Heart Center Freiburg - Bad Krozingen, and Faculty of Medicine, University of Freiburg, Elsässer Straße 2q, 79110, Freiburg, Germany
| | - Thorsten Eierhoff
- Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg, Germany
- BIOSS, Centre for Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
- Clinic for Vascular and Endovascular Surgery, University Hospital Münster, Albert Schweitzer Campus 1, 48149, Münster, Germany
| | - Bernd Kammerer
- BIOSS, Centre for Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany
- Center for Biological Systems Analysis, University of Freiburg, Habsburgerstraße 49, 79104, Freiburg, Germany
- Spemann Graduate School of Biology and Medicine, University of Freiburg, Albertstraße 19a, 79104, Freiburg, Germany
| | - Winfried Römer
- Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg, Germany.
- BIOSS, Centre for Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany.
- CIBSS, Centre for Integrative Biological Signalling Studies, University of Freiburg, Schänzlestraße 18, 79104, Freiburg, Germany.
- Spemann Graduate School of Biology and Medicine, University of Freiburg, Albertstraße 19a, 79104, Freiburg, Germany.
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Modulation of calcium signaling depends on the oligosaccharide of GM1 in Neuro2a mouse neuroblastoma cells. Glycoconj J 2020; 37:713-727. [PMID: 33201378 PMCID: PMC7679337 DOI: 10.1007/s10719-020-09963-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 11/02/2020] [Accepted: 11/09/2020] [Indexed: 01/02/2023]
Abstract
Recently, we demonstrated that the oligosaccharide portion of ganglioside GM1 is responsible, via direct interaction and activation of the TrkA pathway, for the ability of GM1 to promote neuritogenesis and to confer neuroprotection in Neuro2a mouse neuroblastoma cells. Recalling the knowledge that ganglioside GM1 modulates calcium channels activity, thus regulating the cytosolic calcium concentration necessary for neuronal functions, we investigated if the GM1-oligosaccharide would be able to overlap the GM1 properties in the regulation of calcium signaling, excluding a specific role played by the ceramide moiety inserted into the external layer of plasma membrane. We observed, by calcium imaging, that GM1-oligosaccharide administration to undifferentiated Neuro2a cells resulted in an increased calcium influx, which turned out to be mediated by the activation of TrkA receptor. The biochemical analysis demonstrated that PLCγ and PKC activation follows the TrkA stimulation by GM1-oligosaccharide, leading to the opening of calcium channels both on the plasma membrane and on intracellular storages, as confirmed by calcium imaging experiments performed with IP3 receptor inhibitor. Subsequently, we found that neurite elongation in Neuro2a cells was blocked by subtoxic administration of extracellular and intracellular calcium chelators, suggesting that the increase of intracellular calcium is responsible of GM1-oligosaccharide mediated differentiation. These results suggest that GM1-oligosaccharide is responsible for the regulation of calcium signaling and homeostasis at the base of the neuronal functions mediated by plasma membrane GM1.
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8
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Loberto N, Mancini G, Bassi R, Carsana EV, Tamanini A, Pedemonte N, Dechecchi MC, Sonnino S, Aureli M. Sphingolipids and plasma membrane hydrolases in human primary bronchial cells during differentiation and their altered patterns in cystic fibrosis. Glycoconj J 2020; 37:623-633. [PMID: 32666337 PMCID: PMC7501107 DOI: 10.1007/s10719-020-09935-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 06/30/2020] [Accepted: 07/06/2020] [Indexed: 01/26/2023]
Abstract
Human primary bronchial epithelial cells differentiated in vitro represent a valuable tool to study lung diseases such as cystic fibrosis (CF), an inherited disorder caused by mutations in the gene coding for the Cystic Fibrosis Transmembrane Conductance Regulator. In CF, sphingolipids, a ubiquitous class of bioactive lipids mainly associated with the outer layer of the plasma membrane, seem to play a crucial role in the establishment of the severe lung complications. Nevertheless, no information on the involvement of sphingolipids and their metabolism in the differentiation of primary bronchial epithelial cells are available so far. Here we show that ceramide and globotriaosylceramide increased during cell differentiation, whereas glucosylceramide and gangliosides content decreased. In addition, we found that apical plasma membrane of differentiated bronchial cells is characterized by a higher content of sphingolipids in comparison to the other cell membranes and that activity of sphingolipids catabolic enzymes associated with this membrane results altered with respect to the total cell activities. In particular, the apical membrane of CF cells was characterized by high levels of ceramide and glucosylceramide, known to have proinflammatory activity. On this basis, our data further support the role of sphingolipids in the onset of CF lung pathology.
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Affiliation(s)
- Nicoletta Loberto
- Dip. Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, Via Fratelli Cervi 93, Segrate, Milano, 20090, Italy
| | - Giulia Mancini
- Dip. Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, Via Fratelli Cervi 93, Segrate, Milano, 20090, Italy
| | - Rosaria Bassi
- Dip. Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, Via Fratelli Cervi 93, Segrate, Milano, 20090, Italy
| | - Emma Veronica Carsana
- Dip. Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, Via Fratelli Cervi 93, Segrate, Milano, 20090, Italy
| | - Anna Tamanini
- Section of Molecular Pathology, Department of Pathology and Diagnostics, University Hospital of Verona, 37126, Verona, Italy
| | | | - Maria Cristina Dechecchi
- Section of Clinical Biochemistry, Department of Neurosciences, Biomedicine and Movement, University of Verona, 37134, Verona, Italy
| | - Sandro Sonnino
- Dip. Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, Via Fratelli Cervi 93, Segrate, Milano, 20090, Italy
| | - Massimo Aureli
- Dip. Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, Via Fratelli Cervi 93, Segrate, Milano, 20090, Italy.
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9
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Synthesis and Therapeutic Applications of Iminosugars in Cystic Fibrosis. Int J Mol Sci 2020; 21:ijms21093353. [PMID: 32397443 PMCID: PMC7247015 DOI: 10.3390/ijms21093353] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 05/06/2020] [Accepted: 05/06/2020] [Indexed: 12/13/2022] Open
Abstract
Iminosugars are sugar analogues endowed with a high pharmacological potential. The wide range of biological activities exhibited by these glycomimetics associated with their excellent drug profile make them attractive therapeutic candidates for several medical interventions. The ability of iminosugars to act as inhibitors or enhancers of carbohydrate-processing enzymes suggests their potential use as therapeutics for the treatment of cystic fibrosis (CF). Herein we review the most relevant advances in the field, paying attention to both the chemical synthesis of the iminosugars and their biological evaluations, resulting from in vitro and in vivo assays. Starting from the example of the marketed drug NBDNJ (N-butyl deoxynojirimycin), a variety of iminosugars have exhibited the capacity to rescue the trafficking of F508del-CFTR (deletion of F508 residue in the CF transmembrane conductance regulator), either alone or in combination with other correctors. Interesting results have also been obtained when iminosugars were considered as anti-inflammatory agents in CF lung disease. The data herein reported demonstrate that iminosugars hold considerable potential to be applied for both therapeutic purposes.
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10
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Chiricozzi E, Mauri L, Lunghi G, Di Biase E, Fazzari M, Maggioni M, Valsecchi M, Prioni S, Loberto N, Pomè DY, Ciampa MG, Fato P, Verlengia G, Cattaneo S, Assini R, Wu G, Alselehdar S, Ledeen RW, Sonnino S. Parkinson's disease recovery by GM1 oligosaccharide treatment in the B4galnt1 +/- mouse model. Sci Rep 2019; 9:19330. [PMID: 31852959 PMCID: PMC6920361 DOI: 10.1038/s41598-019-55885-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 12/03/2019] [Indexed: 01/25/2023] Open
Abstract
Given the recent in vitro discovery that the free soluble oligosaccharide of GM1 is the bioactive portion of GM1 for neurotrophic functions, we investigated its therapeutic potential in the B4galnt1+/− mice, a model of sporadic Parkinson’s disease. We found that the GM1 oligosaccharide, systemically administered, reaches the brain and completely rescues the physical symptoms, reduces the abnormal nigral α-synuclein content, restores nigral tyrosine hydroxylase expression and striatal neurotransmitter levels, overlapping the wild-type condition. Thus, this study supports the idea that the Parkinson’s phenotype expressed by the B4galnt1+/− mice is due to a reduced level of neuronal ganglioside content and lack of interactions between the oligosaccharide portion of GM1 with specific membrane proteins. It also points to the therapeutic potential of the GM1 oligosaccharide for treatment of sporadic Parkinson’s disease.
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Affiliation(s)
- Elena Chiricozzi
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy.
| | - Laura Mauri
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy
| | - Giulia Lunghi
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy
| | - Erika Di Biase
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy
| | - Maria Fazzari
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy
| | - Margherita Maggioni
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy
| | - Manuela Valsecchi
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy
| | - Simona Prioni
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy
| | - Nicoletta Loberto
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy
| | - Diego Yuri Pomè
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy
| | - Maria Grazia Ciampa
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy
| | - Pamela Fato
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy
| | - Gianluca Verlengia
- School of Medicine, University Vita-Salute San Raffaele, Milano, Italy.,Department of Medical Sciences and National Institute of Neuroscience, University of Ferrara, Ferrara, Italy
| | - Stefano Cattaneo
- School of Medicine, University Vita-Salute San Raffaele, Milano, Italy
| | - Robert Assini
- Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Gusheng Wu
- Division of Neurochemistry, Department of Pharmacology, Physiology & Neuroscience, Rutgers New Jersey Medical School, Newark, NJ, USA
| | - Samar Alselehdar
- Division of Neurochemistry, Department of Pharmacology, Physiology & Neuroscience, Rutgers New Jersey Medical School, Newark, NJ, USA
| | - Robert W Ledeen
- Division of Neurochemistry, Department of Pharmacology, Physiology & Neuroscience, Rutgers New Jersey Medical School, Newark, NJ, USA
| | - Sandro Sonnino
- Department of Medical Biotechnology and Transcriptional Medicine, University of Milano, Milano, Italy.
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11
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Ares MA, Sansabas A, Rodríguez-Valverde D, Siqueiros-Cendón T, Rascón-Cruz Q, Rosales-Reyes R, Jarillo-Quijada MD, Alcántar-Curiel MD, Cedillo ML, Torres J, Girón JA, De la Cruz MA. The Interaction of Klebsiella pneumoniae With Lipid Rafts-Associated Cholesterol Increases Macrophage-Mediated Phagocytosis Due to Down Regulation of the Capsule Polysaccharide. Front Cell Infect Microbiol 2019; 9:255. [PMID: 31380298 PMCID: PMC6650577 DOI: 10.3389/fcimb.2019.00255] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 07/02/2019] [Indexed: 12/17/2022] Open
Abstract
Klebsiella pneumoniae successfully colonizes host tissues by recognizing and interacting with cholesterol present on membrane-associated lipid rafts. In this study, we evaluated the role of cholesterol in the expression of capsule polysaccharide genes of K. pneumoniae and its implication in resistance to phagocytosis. Our data revealed that exogenous cholesterol added to K. pneumoniae increases macrophage-mediated phagocytosis. To explain this event, the expression of capsular galF, wzi, and manC genes was determined in the presence of cholesterol. Down-regulation of these capsular genes occurred leading to increased susceptibility to phagocytosis by macrophages. In contrast, depletion of cholesterol from macrophage membranes led to enhanced expression of galF, wzi, and manC genes and to capsule production resulting in resistance to macrophage-mediated phagocytosis. Cholesterol-mediated repression of capsular genes was dependent on the RcsA and H-NS global regulators. Finally, cholesterol also down-regulated the expression of genes responsible for LPS core oligosaccharides production and OMPs. Our results suggest that cholesterol plays an important role for the host by reducing the anti-phagocytic properties of the K. pneumoniae capsule facilitating bacterial engulfment by macrophages during the bacteria-eukaryotic cell interaction mediated by lipid rafts.
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Affiliation(s)
- Miguel A Ares
- Unidad de Investigación Médica en Enfermedades Infecciosas y Parasitarias, Centro Médico Nacional Siglo XXI, Hospital de Pediatría, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Alejandro Sansabas
- Unidad de Investigación Médica en Enfermedades Infecciosas y Parasitarias, Centro Médico Nacional Siglo XXI, Hospital de Pediatría, Instituto Mexicano del Seguro Social, Mexico City, Mexico.,Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Chihuahua, Mexico
| | - Diana Rodríguez-Valverde
- Unidad de Investigación Médica en Enfermedades Infecciosas y Parasitarias, Centro Médico Nacional Siglo XXI, Hospital de Pediatría, Instituto Mexicano del Seguro Social, Mexico City, Mexico.,Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Chihuahua, Mexico
| | | | - Quintín Rascón-Cruz
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Chihuahua, Mexico
| | - Roberto Rosales-Reyes
- Unidad de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Ma Dolores Jarillo-Quijada
- Unidad de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - María D Alcántar-Curiel
- Unidad de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - María L Cedillo
- Centro de Detección Biomolecular, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - Javier Torres
- Unidad de Investigación Médica en Enfermedades Infecciosas y Parasitarias, Centro Médico Nacional Siglo XXI, Hospital de Pediatría, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Jorge A Girón
- Centro de Detección Biomolecular, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - Miguel A De la Cruz
- Unidad de Investigación Médica en Enfermedades Infecciosas y Parasitarias, Centro Médico Nacional Siglo XXI, Hospital de Pediatría, Instituto Mexicano del Seguro Social, Mexico City, Mexico
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12
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Chiricozzi E, Maggioni M, di Biase E, Lunghi G, Fazzari M, Loberto N, Elisa M, Scalvini FG, Tedeschi G, Sonnino S. The Neuroprotective Role of the GM1 Oligosaccharide, II 3Neu5Ac-Gg 4, in Neuroblastoma Cells. Mol Neurobiol 2019; 56:6673-6702. [PMID: 30911934 DOI: 10.1007/s12035-019-1556-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 03/13/2019] [Indexed: 01/19/2023]
Abstract
Recently, we demonstrated that the GM1 oligosaccharide, II3Neu5Ac-Gg4 (OligoGM1), administered to cultured murine Neuro2a neuroblastoma cells interacts with the NGF receptor TrkA, leading to the activation of the ERK1/2 downstream pathway and to cell differentiation. To understand how the activation of the TrkA pathway is able to trigger key biochemical signaling, we performed a proteomic analysis on Neuro2a cells treated with 50 μM OligoGM1 for 24 h. Over 3000 proteins were identified. Among these, 324 proteins were exclusively expressed in OligoGM1-treated cells. Interestingly, several proteins expressed only in OligoGM1-treated cells are involved in biochemical mechanisms with a neuroprotective potential, reflecting the GM1 neuroprotective effect. In addition, we found that the exogenous administration of OligoGM1 reduced the cellular oxidative stress in Neuro2a cells and conferred protection against MPTP neurotoxicity. These results confirm and reinforce the idea that the molecular mechanisms underlying the GM1 neurotrophic and neuroprotective effects depend on its oligosaccharide chain, suggesting the activation of a positive signaling starting at plasma membrane level.
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Affiliation(s)
- Elena Chiricozzi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy.
| | - Margherita Maggioni
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy
| | - Erika di Biase
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy
| | - Giulia Lunghi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy
| | - Maria Fazzari
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy
| | - Nicoletta Loberto
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy
| | - Maffioli Elisa
- Department of Veterinary Medicine, University of Milan, via Celoria 10, 20133, Milan, Italy
| | | | - Gabriella Tedeschi
- Department of Veterinary Medicine, University of Milan, via Celoria 10, 20133, Milan, Italy
- Fondazione Unimi, v.le Ortles 22/4, 20139, Milan, Italy
| | - Sandro Sonnino
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, MI, Italy.
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13
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Chiricozzi E, Biase ED, Maggioni M, Lunghi G, Fazzari M, Pomè DY, Casellato R, Loberto N, Mauri L, Sonnino S. GM1 promotes TrkA-mediated neuroblastoma cell differentiation by occupying a plasma membrane domain different from TrkA. J Neurochem 2019; 149:231-241. [PMID: 30776097 DOI: 10.1111/jnc.14685] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 01/23/2019] [Accepted: 02/14/2019] [Indexed: 11/30/2022]
Abstract
Recently, we highlighted that the ganglioside GM1 promotes neuroblastoma cells differentiation by activating the TrkA receptor through the formation of a TrkA-GM1 oligosaccharide complex at the cell surface. To study the TrkA-GM1 interaction, we synthesized two radioactive GM1 derivatives presenting a photoactivable nitrophenylazide group at the end of lipid moiety, 1 or at position 6 of external galactose, 2; and a radioactive oligosaccharide portion of GM1 carrying the nitrophenylazide group at position 1 of glucose, 3. The three compounds were singly administered to cultured neuroblastoma Neuro2a cells under established conditions that allow cell surface interactions. After UV activation of photoactivable compounds, the proteins were analyzed by PAGE separation. The formation of cross-linked TrkA-GM1 derivatives complexes was identified by both radioimaging and immunoblotting. Results indicated that the administration of compounds 2 and 3, carrying the photoactivable group on the oligosaccharide, led to the formation of a radioactive TrkA complex, while the administration of compound 1 did not. This underlines that the TrkA-GM1 interaction directly involves the GM1 oligosaccharide, but not the ceramide. To better understand how GM1 relates to the TrkA, we isolated plasma membrane lipid rafts. As expected, GM1 was found in the rigid detergent-resistant fractions, while TrkA was found as a detergent soluble fraction component. These results suggest that TrkA and GM1 belong to separate membrane domains: probably TrkA interacts by 'flopping' down its extracellular portion onto the membrane, approaching its interplay site to the oligosaccharide portion of GM1.
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Affiliation(s)
- Elena Chiricozzi
- Department of Medical Biotechnology and Translational Medicine, University of Milano, Milano, Italy
| | - Erika Di Biase
- Department of Medical Biotechnology and Translational Medicine, University of Milano, Milano, Italy
| | - Margherita Maggioni
- Department of Medical Biotechnology and Translational Medicine, University of Milano, Milano, Italy
| | - Giulia Lunghi
- Department of Medical Biotechnology and Translational Medicine, University of Milano, Milano, Italy
| | - Maria Fazzari
- Department of Medical Biotechnology and Translational Medicine, University of Milano, Milano, Italy
| | - Diego Yuri Pomè
- Department of Medical Biotechnology and Translational Medicine, University of Milano, Milano, Italy
| | - Riccardo Casellato
- Department of Medical Biotechnology and Translational Medicine, University of Milano, Milano, Italy
| | - Nicoletta Loberto
- Department of Medical Biotechnology and Translational Medicine, University of Milano, Milano, Italy
| | - Laura Mauri
- Department of Medical Biotechnology and Translational Medicine, University of Milano, Milano, Italy
| | - Sandro Sonnino
- Department of Medical Biotechnology and Translational Medicine, University of Milano, Milano, Italy
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14
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Malekkou A, Samarani M, Drousiotou A, Votsi C, Sonnino S, Pantzaris M, Chiricozzi E, Zamba-Papanicolaou E, Aureli M, Loberto N, Christodoulou K. Biochemical Characterization of the GBA2 c.1780G>C Missense Mutation in Lymphoblastoid Cells from Patients with Spastic Ataxia. Int J Mol Sci 2018; 19:ijms19103099. [PMID: 30308956 PMCID: PMC6213336 DOI: 10.3390/ijms19103099] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 10/02/2018] [Accepted: 10/08/2018] [Indexed: 12/29/2022] Open
Abstract
The GBA2 gene encodes the non-lysosomal glucosylceramidase (NLGase), an enzyme that catalyzes the conversion of glucosylceramide (GlcCer) to ceramide and glucose. Mutations in GBA2 have been associated with the development of neurological disorders such as autosomal recessive cerebellar ataxia, hereditary spastic paraplegia, and Marinesco-Sjogren-Like Syndrome. Our group has previously identified the GBA2 c.1780G>C [p.Asp594His] missense mutation, in a Cypriot consanguineous family with spastic ataxia. In this study, we carried out a biochemical characterization of lymphoblastoid cell lines (LCLs) derived from three patients of this family. We found that the mutation strongly reduce NLGase activity both intracellularly and at the plasma membrane level. Additionally, we observed a two-fold increase of GlcCer content in LCLs derived from patients compared to controls, with the C16 lipid being the most abundant GlcCer species. Moreover, we showed that there is an apparent compensatory effect between NLGase and the lysosomal glucosylceramidase (GCase), since we found that the activity of GCase was three-fold higher in LCLs derived from patients compared to controls. We conclude that the c.1780G>C mutation results in NLGase loss of function with abolishment of the enzymatic activity and accumulation of GlcCer accompanied by a compensatory increase in GCase.
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Affiliation(s)
- Anna Malekkou
- Biochemical Genetics Department, The Cyprus Institute of Neurology and Genetics, Nicosia 1683, Cyprus.
- Cyprus School of Molecular Medicine, Nicosia 1683, Cyprus.
| | - Maura Samarani
- Department of Medical Biotechnology and Translational Medicine, University of Milano, 20122 Milano, Italy.
| | - Anthi Drousiotou
- Biochemical Genetics Department, The Cyprus Institute of Neurology and Genetics, Nicosia 1683, Cyprus.
- Cyprus School of Molecular Medicine, Nicosia 1683, Cyprus.
| | - Christina Votsi
- Cyprus School of Molecular Medicine, Nicosia 1683, Cyprus.
- Neurogenetics Department, The Cyprus Institute of Neurology and Genetics, Nicosia 1683, Cyprus.
| | - Sandro Sonnino
- Department of Medical Biotechnology and Translational Medicine, University of Milano, 20122 Milano, Italy.
| | - Marios Pantzaris
- Cyprus School of Molecular Medicine, Nicosia 1683, Cyprus.
- Neurology Clinic C, The Cyprus Institute of Neurology and Genetics, Nicosia 1683, Cyprus.
| | - Elena Chiricozzi
- Department of Medical Biotechnology and Translational Medicine, University of Milano, 20122 Milano, Italy.
| | - Eleni Zamba-Papanicolaou
- Cyprus School of Molecular Medicine, Nicosia 1683, Cyprus.
- Neurology Clinic D, The Cyprus Institute of Neurology and Genetics, Nicosia 1683, Cyprus.
| | - Massimo Aureli
- Department of Medical Biotechnology and Translational Medicine, University of Milano, 20122 Milano, Italy.
| | - Nicoletta Loberto
- Department of Medical Biotechnology and Translational Medicine, University of Milano, 20122 Milano, Italy.
| | - Kyproula Christodoulou
- Cyprus School of Molecular Medicine, Nicosia 1683, Cyprus.
- Neurogenetics Department, The Cyprus Institute of Neurology and Genetics, Nicosia 1683, Cyprus.
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15
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Samarani M, Loberto N, Soldà G, Straniero L, Asselta R, Duga S, Lunghi G, Zucca FA, Mauri L, Ciampa MG, Schiumarini D, Bassi R, Giussani P, Chiricozzi E, Prinetti A, Aureli M, Sonnino S. A lysosome-plasma membrane-sphingolipid axis linking lysosomal storage to cell growth arrest. FASEB J 2018; 32:5685-5702. [PMID: 29746165 PMCID: PMC6133699 DOI: 10.1096/fj.201701512rr] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 04/30/2018] [Indexed: 01/15/2023]
Abstract
Lysosomal accumulation of undegraded materials is a common feature of lysosomal storage diseases, neurodegenerative disorders, and the aging process. To better understand the role of lysosomal storage in the onset of cell damage, we used human fibroblasts loaded with sucrose as a model of lysosomal accumulation. Sucrose-loaded fibroblasts displayed increased lysosomal biogenesis followed by arrested cell proliferation. Notably, we found that reduced lysosomal catabolism and autophagy impairment led to an increase in sphingolipids ( i.e., sphingomyelin, glucosylceramide, ceramide, and the gangliosides GM3 and GD3), at both intracellular and plasma membrane (PM) levels. In addition, we observed an increase in the lysosomal membrane protein Lamp-1 on the PM of sucrose-loaded fibroblasts and a greater release of the soluble lysosomal protein cathepsin D in their extracellular medium compared with controls. These results indicate increased fusion between lysosomes and the PM, as also suggested by the increased activity of lysosomal glycosphingolipid hydrolases on the PM of sucrose-loaded fibroblasts. The inhibition of β-glucocerebrosidase and nonlysosomal glucosylceramidase, both involved in ceramide production resulting from glycosphingolipid catabolism on the PM, partially restored cell proliferation. Our findings indicate the existence of a new molecular mechanism underlying cell damage triggered by lysosomal impairment.-Samarani, M., Loberto, N., Soldà, G., Straniero, L., Asselta, R., Duga, S., Lunghi, G., Zucca, F. A., Mauri, L., Ciampa, M. G., Schiumarini, D., Bassi, R., Giussani, P., Chiricozzi, E., Prinetti, A., Aureli, M., Sonnino, S. A lysosome-plasma membrane-sphingolipid axis linking lysosomal storage to cell growth arrest.
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Affiliation(s)
- Maura Samarani
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Nicoletta Loberto
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Giulia Soldà
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
- Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Letizia Straniero
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
- Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Rosanna Asselta
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
- Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Stefano Duga
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
- Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Giulia Lunghi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Fabio A. Zucca
- Institute of Biomedical Technologies, National Research Council of Italy, Segrate, Italy
| | - Laura Mauri
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Maria Grazia Ciampa
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Domitilla Schiumarini
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Rosaria Bassi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Paola Giussani
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Elena Chiricozzi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Alessandro Prinetti
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Massimo Aureli
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Sandro Sonnino
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
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