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Barchi A, Massimino L, Mandarino FV, Vespa E, Sinagra E, Almolla O, Passaretti S, Fasulo E, Parigi TL, Cagliani S, Spanò S, Ungaro F, Danese S. Microbiota profiling in esophageal diseases: Novel insights into molecular staining and clinical outcomes. Comput Struct Biotechnol J 2024; 23:626-637. [PMID: 38274997 PMCID: PMC10808859 DOI: 10.1016/j.csbj.2023.12.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 12/22/2023] [Accepted: 12/23/2023] [Indexed: 01/27/2024] Open
Abstract
Gut microbiota is recognized nowadays as one of the key players in the development of several gastro-intestinal diseases. The first studies focused mainly on healthy subjects with staining of main bacterial species via culture-based techniques. Subsequently, lots of studies tried to focus on principal esophageal disease enlarged the knowledge on esophageal microbial environment and its role in pathogenesis. Gastro Esophageal Reflux Disease (GERD), the most widespread esophageal condition, seems related to a certain degree of mucosal inflammation, via interleukin (IL) 8 potentially enhanced by bacterial components, lipopolysaccharide (LPS) above all. Gram- bacteria, producing LPS), such as Campylobacter genus, have been found associated with GERD. Barrett esophagus (BE) seems characterized by a Gram- and microaerophils-shaped microbiota. Esophageal cancer (EC) development leads to an overturn in the esophageal environment with the shift from an oral-like microbiome to a prevalently low-abundant and low-diverse Gram--shaped microbiome. Although underinvestigated, also changes in the esophageal microbiome are associated with rare chronic inflammatory or neuropathic disease pathogenesis. The paucity of knowledge about the microbiota-driven mechanisms in esophageal disease pathogenesis is mainly due to the scarce sensitivity of sequencing technology and culture methods applied so far to study commensals in the esophagus. However, the recent advances in molecular techniques, especially with the advent of non-culture-based genomic sequencing tools and the implementation of multi-omics approaches, have revolutionized the microbiome field, with promises of implementing the current knowledge, discovering more mechanisms underneath, and giving insights into the development of novel therapies aimed to re-establish the microbial equilibrium for ameliorating esophageal diseases..
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Affiliation(s)
- Alberto Barchi
- Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Luca Massimino
- Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
| | | | - Edoardo Vespa
- Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Emanuele Sinagra
- Gastroenterology & Endoscopy Unit, Fondazione Istituto G. Giglio, Cefalù, Italy
| | - Omar Almolla
- Università Vita-Salute San Raffaele, Faculty of Medicine, Milan, Italy
| | - Sandro Passaretti
- Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Ernesto Fasulo
- Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Tommaso Lorenzo Parigi
- Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
- Università Vita-Salute San Raffaele, Faculty of Medicine, Milan, Italy
| | - Stefania Cagliani
- Università Vita-Salute San Raffaele, Faculty of Medicine, Milan, Italy
| | - Salvatore Spanò
- Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Federica Ungaro
- Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Silvio Danese
- Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
- Università Vita-Salute San Raffaele, Faculty of Medicine, Milan, Italy
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Massimino L, Palmieri O, Facoetti A, Fuggetta D, Spanò S, Lamparelli LA, D'Alessio S, Cagliani S, Furfaro F, D'Amico F, Zilli A, Fiorino G, Parigi TL, Noviello D, Latiano A, Bossa F, Latiano T, Pirola A, Mologni L, Piazza RG, Abbati D, Perri F, Bonini C, Peyrin-Biroulet L, Malesci A, Jairath V, Danese S, Ungaro F. Gut virome-colonising Orthohepadnavirus genus is associated with ulcerative colitis pathogenesis and induces intestinal inflammation in vivo. Gut 2023; 72:1838-1847. [PMID: 36788014 PMCID: PMC10511988 DOI: 10.1136/gutjnl-2022-328375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 02/06/2023] [Indexed: 02/16/2023]
Abstract
OBJECTIVES Ulcerative colitis (UC) is a chronic inflammatory disorder of unknown aetiology. Gut virome dysbiosis is fundamental in UC progression, although its role in the early phases of the disease is far from fully understood. Therefore, we sought to investigate the role of a virome-associated protein encoded by the Orthohepadnavirus genus, the hepatitis B virus X protein (HBx), in UC aetiopathogenesis. DESIGN HBx positivity of UC patient-derived blood and gut mucosa was assessed by RT-PCR and Sanger sequencing and correlated with clinical characteristics by multivariate analysis. Transcriptomics was performed on HBx-overexpressing endoscopic biopsies from healthy donors.C57BL/6 mice underwent intramucosal injections of liposome-conjugated HBx-encoding plasmids or the control, with or without antibiotic treatment. Multidimensional flow cytometry analysis was performed on colonic samples from HBx-treated and control animals. Transepithelial electrical resistance measurement, proliferation assay, chromatin immunoprecipitation assay with sequencing and RNA-sequencing were performed on in vitro models of the gut barrier. HBx-silencing experiments were performed in vitro and in vivo. RESULTS HBx was detected in about 45% of patients with UC and found to induce colonic inflammation in mice, while its silencing reverted the colitis phenotype in vivo. HBx acted as a transcriptional regulator in epithelial cells, provoking barrier leakage and altering both innate and adaptive mucosal immunity ex vivo and in vivo. CONCLUSION This study described HBx as a contributor to the UC pathogenesis and provides a new perspective on the virome as a target for tailored treatments.
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Affiliation(s)
- Luca Massimino
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milano, Italy
- Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milano, Italy
| | - Orazio Palmieri
- Division of Gastroenterology and Endoscopy, Fondazione IRCCS "Casa Sollievo della Sofferenza", San Giovanni Rotondo, Foggia, Italy
| | - Amanda Facoetti
- Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milano, Italy
- Faculty of Medicine, Università Vita Salute San Raffaele, Milano, Italy
| | - Davide Fuggetta
- Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milano, Italy
- Faculty of Medicine, Università Vita Salute San Raffaele, Milano, Italy
| | - Salvatore Spanò
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milano, Italy
- Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milano, Italy
| | - Luigi Antonio Lamparelli
- IBD Center, IRCCS Humanitas Research Hospital, Rozzano, Italy
- Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | | | - Stefania Cagliani
- Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milano, Italy
- Faculty of Medicine, Università Vita Salute San Raffaele, Milano, Italy
| | - Federica Furfaro
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milano, Italy
| | - Ferdinando D'Amico
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milano, Italy
| | - Alessandra Zilli
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milano, Italy
| | - Gionata Fiorino
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milano, Italy
- Faculty of Medicine, Università Vita Salute San Raffaele, Milano, Italy
| | - Tommaso Lorenzo Parigi
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milano, Italy
- Faculty of Medicine, Università Vita Salute San Raffaele, Milano, Italy
| | - Daniele Noviello
- Department of Pathophysiology and Transplantation, University of Milan, Milano, Italy
| | - Anna Latiano
- Division of Gastroenterology and Endoscopy, Fondazione IRCCS "Casa Sollievo della Sofferenza", San Giovanni Rotondo, Foggia, Italy
| | - Fabrizio Bossa
- Division of Gastroenterology and Endoscopy, Fondazione IRCCS "Casa Sollievo della Sofferenza", San Giovanni Rotondo, Foggia, Italy
| | - Tiziana Latiano
- Division of Gastroenterology and Endoscopy, Fondazione IRCCS "Casa Sollievo della Sofferenza", San Giovanni Rotondo, Foggia, Italy
| | | | - Luca Mologni
- Department of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy
| | - Rocco Giovanni Piazza
- Department of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy
- Hematology and Clinical Research Unit, San Gerardo Hospital, Monza, Italy
| | - Danilo Abbati
- Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milano, Italy
| | - Francesco Perri
- Division of Gastroenterology and Endoscopy, Fondazione IRCCS "Casa Sollievo della Sofferenza", San Giovanni Rotondo, Foggia, Italy
| | - Chiara Bonini
- Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milano, Italy
- Faculty of Medicine, Università Vita Salute San Raffaele, Milano, Italy
| | - Laurent Peyrin-Biroulet
- Inserm NGERE, University of Lorraine, Nancy, France
- Department of Hepato-Gastroenterology, University Hospital Centre Nancy, Nancy, France
| | - Alberto Malesci
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milano, Italy
- Faculty of Medicine, Università Vita Salute San Raffaele, Milano, Italy
| | - Vipul Jairath
- Department of Medicine, Division of Gastroenterology, Western University, London, Ontario, Canada
| | - Silvio Danese
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milano, Italy
- Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milano, Italy
- Faculty of Medicine, Università Vita Salute San Raffaele, Milano, Italy
| | - Federica Ungaro
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milano, Italy
- Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milano, Italy
- Faculty of Medicine, Università Vita Salute San Raffaele, Milano, Italy
- Department of Biomedical Sciences, Humanitas University, Milan, Italy
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3
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Massimino L, Barchi A, Mandarino FV, Spanò S, Lamparelli LA, Vespa E, Passaretti S, Peyrin-Biroulet L, Savarino EV, Jairath V, Ungaro F, Danese S. A multi-omic analysis reveals the esophageal dysbiosis as the predominant trait of eosinophilic esophagitis. J Transl Med 2023; 21:46. [PMID: 36698146 PMCID: PMC9875471 DOI: 10.1186/s12967-023-03898-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 01/17/2023] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Eosinophilic esophagitis (EoE) is a chronic immune-mediated rare disease, characterized by esophageal dysfunctions. It is likely to be primarily activated by food antigens and is classified as a chronic disease for most patients. Therefore, a deeper understanding of the pathogenetic mechanisms underlying EoE is needed to implement and improve therapeutic lines of intervention and ameliorate overall patient wellness. METHODS RNA-seq data of 18 different studies on EoE, downloaded from NCBI GEO with faster-qdump ( https://github.com/ncbi/sra-tools ), were batch-corrected and analyzed for transcriptomics and metatranscriptomics profiling as well as biological process functional enrichment. The EoE TaMMA web app was designed with plotly and dash. Tabula Sapiens raw data were downloaded from the UCSC Cell Browser. Esophageal single-cell raw data analysis was performed within the Automated Single-cell Analysis Pipeline. Single-cell data-driven bulk RNA-seq data deconvolution was performed with MuSiC and CIBERSORTx. Multi-omics integration was performed with MOFA. RESULTS The EoE TaMMA framework pointed out disease-specific molecular signatures, confirming its reliability in reanalyzing transcriptomic data, and providing new EoE-specific molecular markers including CXCL14, distinguishing EoE from gastroesophageal reflux disorder. EoE TaMMA also revealed microbiota dysbiosis as a predominant characteristic of EoE pathogenesis. Finally, the multi-omics analysis highlighted the presence of defined classes of microbial entities in subsets of patients that may participate in inducing the antigen-mediated response typical of EoE pathogenesis. CONCLUSIONS Our study showed that the complex EoE molecular network may be unraveled through advanced bioinformatics, integrating different components of the disease process into an omics-based network approach. This may implement EoE management and treatment in the coming years.
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Affiliation(s)
- Luca Massimino
- grid.18887.3e0000000417581884Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy ,grid.18887.3e0000000417581884Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Alberto Barchi
- grid.18887.3e0000000417581884Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Francesco Vito Mandarino
- grid.18887.3e0000000417581884Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Salvatore Spanò
- grid.18887.3e0000000417581884Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy ,grid.18887.3e0000000417581884Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milan, Italy
| | | | - Edoardo Vespa
- grid.18887.3e0000000417581884Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Sandro Passaretti
- grid.18887.3e0000000417581884Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Laurent Peyrin-Biroulet
- grid.29172.3f0000 0001 2194 6418Inserm NGERE, University of Lorraine, Vandoeuvre-les-Nancy, France ,grid.410527.50000 0004 1765 1301Nancy University Hospital, Vandoeuvre-les-Nancy, France
| | - Edoardo Vincenzo Savarino
- grid.5608.b0000 0004 1757 3470Department of Surgery, Oncology, and Gastroenterology, University of Padua, Padua, Italy ,grid.5608.b0000 0004 1757 3470Gastroenterology Unit, Azienda Ospedale Università di Padova, Padua, Italy
| | - Vipul Jairath
- grid.39381.300000 0004 1936 8884Department of Medicine, Division of Gastroenterology, Western University, London, ON Canada
| | - Federica Ungaro
- grid.18887.3e0000000417581884Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy ,grid.18887.3e0000000417581884Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milan, Italy ,grid.15496.3f0000 0001 0439 0892Faculty of Medicine, Università Vita-Salute San Raffaele, Milan, Italy
| | - Silvio Danese
- grid.18887.3e0000000417581884Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele, Milan, Italy ,grid.18887.3e0000000417581884Division of Immunology, Transplantation and Infectious Disease, IRCCS Ospedale San Raffaele, Milan, Italy ,grid.15496.3f0000 0001 0439 0892Faculty of Medicine, Università Vita-Salute San Raffaele, Milan, Italy
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Massimino L, Spanò S, Lamparelli LA, Fuggetta D, Peyrin-Biroulet L, Sileri P, Danese S, D'Alessio S, Ungaro F. Tofacitinib Inhibits Leukocyte Trafficking Across the Intestinal Endothelial Barrier in a Specific Cohort of Ulcerative Colitis Patients. Inflamm Bowel Dis 2022; 28:971-976. [PMID: 35032171 DOI: 10.1093/ibd/izab349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Indexed: 12/09/2022]
Abstract
Lay Summary
The JAK/STAT inhibitor tofacitinib, recently approved for the treatment of ulcerative colitis, is found to modulate the intestinal endothelial barrier functions in directing the leukocyte adhesion and transmigration in ulcerative colitis patients displaying high levels of endothelial STAT3/STAT6 phosphorylation.
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Affiliation(s)
- Luca Massimino
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele Hospital, Milan, Italy
| | - Salvatore Spanò
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele Hospital, Milan, Italy
| | - Luigi Antonio Lamparelli
- Laboratory of Gastrointestinal Immunopathology, IRCCS Humanitas Research Hospital, Rozzano, Italy
| | - Davide Fuggetta
- Laboratory of Gastrointestinal Immunopathology, IRCCS Humanitas Research Hospital, Rozzano, Italy
| | - Laurent Peyrin-Biroulet
- INSERM NGERE, University of Lorraine, Vandoeuvre-les-Nancy, France.,Nancy University Hospital, Vandoeuvre-les-Nancy, France
| | - Pierpaolo Sileri
- Gastrointestinal Surgery Unit, IRCCS Ospedale San Raffaele, MilanItaly
| | - Silvio Danese
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele Hospital, Milan, Italy.,Università Vita-Salute San Raffaele, Milan, Italy
| | | | - Federica Ungaro
- Department of Gastroenterology and Digestive Endoscopy, IRCCS Ospedale San Raffaele Hospital, Milan, Italy.,Laboratory of Gastrointestinal Immunopathology, IRCCS Humanitas Research Hospital, Rozzano, Italy
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5
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Rubbino F, Garlatti V, Garzarelli V, Massimino L, Spanò S, Iadarola P, Cagnone M, Giera M, Heijink M, Guglielmetti S, Arena V, Malesci A, Laghi L, Danese S, Vetrano S. GPR120 prevents colorectal adenocarcinoma progression by sustaining the mucosal barrier integrity. Sci Rep 2022; 12:381. [PMID: 35013389 PMCID: PMC8748819 DOI: 10.1038/s41598-021-03787-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 11/29/2021] [Indexed: 12/26/2022] Open
Abstract
GPR120 (encoded by FFAR4 gene) is a receptor for long chain fatty acids, activated by ω-3 Polyunsaturated Fatty Acids (PUFAs), and expressed in many cell types. Its role in the context of colorectal cancer (CRC) is still puzzling with many controversial evidences. Here, we explored the involvement of epithelial GPR120 in the CRC development. Both in vitro and in vivo experiments were conducted to mimic the conditional deletion of the receptor from gut epithelium. Intestinal permeability and integrity of mucus layer were assessed by using Evans blue dye and immunofluorescence for MUC-2 protein, respectively. Microbiota composition, presence of lipid mediators and short chain fatty acids were analyzed in the stools of conditional GPR120 and wild type (WT) mice. Incidence and grade of tumors were evaluated in all groups of mice before and after colitis-associated cancer. Finally, GPR120 expression was analyzed in 9 human normal tissues, 9 adenomas, and 17 primary adenocarcinomas. Our work for the first time highlights the role of the receptor in the progression of colorectal cancer. We observed that the loss of epithelial GPR120 in the gut results into increased intestinal permeability, microbiota translocation and dysbiosis, which turns into hyperproliferation of epithelial cells, likely through the activation of β -catenin signaling. Therefore, the loss of GPR120 represents an early event of CRC, but avoid its progression as invasive cancer. these results demonstrate that the epithelial GPR120 receptor is essential to maintain the mucosal barrier integrity and to prevent CRC developing. Therefore, our data pave the way to GPR120 as an useful marker for the phenotypic characterization of CRC lesions and as new potential target for CRC prevention.
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Affiliation(s)
- Federica Rubbino
- Laboratory of Molecular Gastroenterology, IRCCS Humanitas Research Hospital, Rozzano (Mi), Italy
| | - Valentina Garlatti
- Department of Pharmaceutical Science, Università Degli Studi del Piemonte Orientale "Amedeo Avogadro", Novara, Italy
| | | | - Luca Massimino
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
- Laboratory of Gastrointestinal Immunopathology, IBD Center, IRCCS Humanitas Research Hospital, Rozzano (Mi), Italy
| | - Salvatore Spanò
- Laboratory of Gastrointestinal Immunopathology, IBD Center, IRCCS Humanitas Research Hospital, Rozzano (Mi), Italy
| | - Paolo Iadarola
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia, Italy
| | | | - Martin Giera
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Marieke Heijink
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Simone Guglielmetti
- Division of Food Microbiology and Bioprocesses, Department of Food Environmental and Nutritional Sciences (DeFENS), Università Degli Studi Di Milano, Milan, Italy
| | - Vincenzo Arena
- Fondazione Policlinico Universitario Agostino Gemelli, IRCCS Università Cattolica del Sacro Cuore, Rome, Italy
| | - Alberto Malesci
- Laboratory of Molecular Gastroenterology, IRCCS Humanitas Research Hospital, Rozzano (Mi), Italy
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
| | - Luigi Laghi
- Laboratory of Molecular Gastroenterology, IRCCS Humanitas Research Hospital, Rozzano (Mi), Italy
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Silvio Danese
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
- Laboratory of Gastrointestinal Immunopathology, IBD Center, IRCCS Humanitas Research Hospital, Rozzano (Mi), Italy
| | - Stefania Vetrano
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy.
- Laboratory of Gastrointestinal Immunopathology, IBD Center, IRCCS Humanitas Research Hospital, Rozzano (Mi), Italy.
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6
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Ungaro F, Garlatti V, Massimino L, Spinelli A, Carvello M, Sacchi M, Spanò S, Colasante G, Valassina N, Vetrano S, Malesci A, Peyrin-Biroulet L, Danese S, D'Alessio S. mTOR-Dependent Stimulation of IL20RA Orchestrates Immune Cell Trafficking through Lymphatic Endothelium in Patients with Crohn's Disease. Cells 2019; 8:cells8080924. [PMID: 31426584 PMCID: PMC6721646 DOI: 10.3390/cells8080924] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 08/12/2019] [Accepted: 08/15/2019] [Indexed: 12/21/2022] Open
Abstract
Crohn’s disease (CD) is a chronic inflammatory condition that can affect different portions of the gastrointestinal tract. Lymphatic drainage was demonstrated to be dysfunctional in CD pathogenesis, ultimately causing the failure of the resolution of intestinal inflammation. To investigate the molecular mechanisms underlying these dysfunctions, we isolated human intestinal lymphatic endothelial cells (HILECs) from surgical specimens of patients undergoing resection for complicated CD (CD HILEC) and from a disease-free margin of surgical specimens of patients undergoing resection for cancer (healthy HILEC). Both cell types underwent transcriptomic profiling, and their barrier functionality was tested using a transwell-based co-culture system between HILEC and lamina propria mononuclear cells (LPMCs). Results showed CD HILEC displayed a peculiar transcriptomic signature that highlighted mTOR signaling as an orchestrator of leukocyte trafficking through the lymphatic barrier of CD patients. Moreover, we demonstrated that LPMC transmigration through the lymphatic endothelium of patients with CD depends on the capability of mTOR to trigger interleukin 20 receptor subunit α (IL20RA)-mediated intracellular signaling. Conclusively, our study suggests that leukocyte trafficking through the intestinal lymphatic microvasculature can be controlled by modulating IL20RA, thus leading to the resolution of chronic inflammation in patients with CD.
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Affiliation(s)
- Federica Ungaro
- IBD Center, Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, 20089 Milan, Italy
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, 20090 Milan, Italy
| | - Valentina Garlatti
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, 20090 Milan, Italy
| | - Luca Massimino
- Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Antonino Spinelli
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, 20090 Milan, Italy
- Colon and Rectal Surgery Unit, Humanitas Clinical and Research Center, Rozzano, 20089 Milan, Italy
| | - Michele Carvello
- Colon and Rectal Surgery Unit, Humanitas Clinical and Research Center, Rozzano, 20089 Milan, Italy
| | - Matteo Sacchi
- Colon and Rectal Surgery Unit, Humanitas Clinical and Research Center, Rozzano, 20089 Milan, Italy
| | - Salvatore Spanò
- IBD Center, Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, 20089 Milan, Italy
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, 20090 Milan, Italy
| | - Gaia Colasante
- Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Nicholas Valassina
- Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Stefania Vetrano
- IBD Center, Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, 20089 Milan, Italy
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, 20090 Milan, Italy
| | - Alberto Malesci
- Department of Medical Biotechnologies and Translational Medicine, University of Milan, 200129 Milan, Italy
- Department of Gastroenterology, Humanitas Clinical and Research Center, Rozzano, 20089 Milan, Italy
| | - Laurent Peyrin-Biroulet
- Inserm Ngere and Nancy University Hospital, Lorraine University, 54500 Vandoeuvre-lès-Nancy, France
| | - Silvio Danese
- IBD Center, Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, 20089 Milan, Italy
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, 20090 Milan, Italy
| | - Silvia D'Alessio
- IBD Center, Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, 20089 Milan, Italy.
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, 20090 Milan, Italy.
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7
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Tacconi C, Ungaro F, Correale C, Arena V, Massimino L, Detmar M, Spinelli A, Carvello M, Mazzone M, Oliveira AI, Rubbino F, Garlatti V, Spanò S, Lugli E, Colombo FS, Malesci A, Peyrin-Biroulet L, Vetrano S, Danese S, D'Alessio S. Activation of the VEGFC/VEGFR3 Pathway Induces Tumor Immune Escape in Colorectal Cancer. Cancer Res 2019; 79:4196-4210. [PMID: 31239267 DOI: 10.1158/0008-5472.can-18-3657] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 05/09/2019] [Accepted: 06/13/2019] [Indexed: 11/16/2022]
Abstract
Colorectal cancer is a major cause of cancer-related death in Western countries and is associated with increased numbers of lymphatic vessels (LV) and tumor-associated macrophages (TAM). The VEGFC/VEGFR3 pathway is regarded as the principal inducer of lymphangiogenesis and it contributes to metastases; however, no data are available regarding its role during primary colorectal cancer development. We found that both VEGFC and VEGFR3 were upregulated in human nonmetastatic colorectal cancer, with VEGFR3 expressed on both LVs and TAMs. With the use of three different preclinical models of colorectal cancer, we also discovered that the VEGFC/VEGFR3 axis can shape both lymphatic endothelial cells and TAMs to synergistically inhibit antitumor immunity and promote primary colorectal cancer growth. Therefore, VEGFR3-directed therapy could be envisioned for the treatment of nonmetastatic colorectal cancer. SIGNIFICANCE: The prolymphangiogenic factor VEGFC is abundant in colorectal cancer and activates VEGFR3 present on cancer-associated macrophages and lymphatic vessels; activation of VEGFR3 signaling fosters cancer immune escape, resulting in enhanced tumor growth.
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Affiliation(s)
- Carlotta Tacconi
- Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, Italy.,Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, Zurich, Switzerland
| | - Federica Ungaro
- Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Carmen Correale
- Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Vincenzo Arena
- Department of Internal Medicine, Catholic University of Rome, Rome, Italy
| | - Luca Massimino
- School of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy
| | - Michael Detmar
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, Zurich, Switzerland
| | - Antonino Spinelli
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy.,Colon and Rectal Surgery Department, Humanitas Research Hospital, Rozzano, Italy
| | - Michele Carvello
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy.,Colon and Rectal Surgery Department, Humanitas Research Hospital, Rozzano, Italy
| | - Massimiliano Mazzone
- Laboratory of Tumor Inflammation and Angiogenesis, Center for Cancer Biology, Leuven, Belgium.,Lab of Tumor Inflammation and Angiogenesis, Department of Oncology, KU Leuven, Leuven, Belgium
| | - Ana I Oliveira
- Laboratory of Tumor Inflammation and Angiogenesis, Center for Cancer Biology, Leuven, Belgium.,Lab of Tumor Inflammation and Angiogenesis, Department of Oncology, KU Leuven, Leuven, Belgium
| | - Federica Rubbino
- Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Valentina Garlatti
- Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Salvatore Spanò
- Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Enrico Lugli
- Laboratory of Translational Immunology, Humanitas Clinical and Research Center, Rozzano, Italy.,Humanitas Flow Cytometry Core, Humanitas Clinical and Research Center, Rozzano, Italy
| | - Federico S Colombo
- Humanitas Flow Cytometry Core, Humanitas Clinical and Research Center, Rozzano, Italy
| | - Alberto Malesci
- Department of Biotechnologies and Translational Medicine, University of Milan, Rozzano (Milan), Italy.,Department of Gastroenterology, Humanitas Clinical and Research Center, Rozzano (Milan), Italy
| | - Laurent Peyrin-Biroulet
- Institut National de la Santé et de la Recherche Médicale U954 and Department of Gastroenterology, Nancy University Hospital, Lorraine University, Nancy, France
| | - Stefania Vetrano
- Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Silvio Danese
- Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Silvia D'Alessio
- Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Rozzano, Italy. .,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
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8
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Ungaro F, Colombo P, Massimino L, Ugolini GS, Correale C, Rasponi M, Garlatti V, Rubbino F, Tacconi C, Spaggiari P, Spinelli A, Carvello M, Sacchi M, Spanò S, Vetrano S, Malesci A, Peyrin-Biroulet L, Danese S, D'Alessio S. Lymphatic endothelium contributes to colorectal cancer growth via the soluble matrisome component GDF11. Int J Cancer 2019; 145:1913-1920. [PMID: 30889293 DOI: 10.1002/ijc.32286] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 01/25/2019] [Accepted: 02/28/2019] [Indexed: 12/17/2022]
Abstract
Colorectal cancer (CRC) is one of the most malignant tumors worldwide. Stromal cells residing in the tumor microenvironment strongly contribute to cancer progression through their crosstalk with cancer cells and extracellular matrix. Here we provide the first evidence that CRC-associated lymphatic endothelium displays a distinct matrisome-associated transcriptomic signature, which distinguishes them from healthy intestinal lymphatics. We also demonstrate that CRC-associated human intestinal lymphatic endothelial cells regulate tumor cell growth via growth differentiation factor 11, a soluble matrisome component which in CRC patients was found to be associated with tumor progression. Our data provide new insights into lymphatic contribution to CRC growth, aside from their conventional role as conduits of metastasis.
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Affiliation(s)
- Federica Ungaro
- IBD Center, Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | | | - Luca Massimino
- Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy
| | | | - Carmen Correale
- IBD Center, Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Milan, Italy
| | - Marco Rasponi
- Department of Electronics, Information and Bioengineering, Milan, Italy
| | | | - Federica Rubbino
- Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Carlotta Tacconi
- Institute of Pharmaceutical Sciences, Pharmacogenomics, Swiss Federal Institute of Technology (ETH), Zurich, Switzerland
| | - Paola Spaggiari
- Department of Pathology, Humanitas Clinical and Research Center, Milan, Italy
| | - Antonino Spinelli
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,Colon and Rectal Surgery Unit, Humanitas Clinical and Research Center, Milan, Italy
| | - Michele Carvello
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,Colon and Rectal Surgery Unit, Humanitas Clinical and Research Center, Milan, Italy
| | - Matteo Sacchi
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,Colon and Rectal Surgery Unit, Humanitas Clinical and Research Center, Milan, Italy
| | - Salvatore Spanò
- IBD Center, Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Stefania Vetrano
- IBD Center, Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Alberto Malesci
- Department of Medical Biotechnologies and Translational Medicine, University of Milan, Milan, Italy.,Department of Gastroenterology, Humanitas Clinical and Research Center, Milan, Italy
| | - Laurent Peyrin-Biroulet
- Institut National de la Santé et de la Recherche Médicale U954 and Department of Gastroenterology, Nancy University Hospital, Lorraine University, Nancy, France
| | - Silvio Danese
- IBD Center, Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Silvia D'Alessio
- IBD Center, Laboratory of Gastrointestinal Immunopathology, Humanitas Clinical and Research Center, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
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9
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Onnis A, Finetti F, Patrussi L, Gottardo M, Cassioli C, Spanò S, Baldari CT. The small GTPase Rab29 is a common regulator of immune synapse assembly and ciliogenesis. Cell Death Differ 2015; 22:1687-99. [PMID: 26021297 DOI: 10.1038/cdd.2015.17] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 01/21/2015] [Accepted: 02/02/2015] [Indexed: 01/09/2023] Open
Abstract
Accumulating evidence underscores the T-cell immune synapse (IS) as a site of intense vesicular trafficking, on which productive signaling and cell activation crucially depend. Although the T-cell antigen receptor (TCR) is known to exploit recycling to accumulate to the IS, the specific pathway that controls this process remains to be elucidated. Here we demonstrate that the small GTPase Rab29 is centrally implicated in TCR trafficking and IS assembly. Rab29 colocalized and interacted with Rab8, Rab11 and IFT20, a component of the intraflagellar transport system that regulates ciliogenesis and participates in TCR recycling in the non-ciliated T cell, as assessed by co-immunoprecipitation and immunofluorescence analysis. Rab29 depletion resulted in the inability of TCRs to undergo recycling to the IS, thereby compromizing IS assembly. Under these conditions, recycling TCRs accumulated in Rab11(+) endosomes that failed to polarize to the IS due to defective Rab29-dependent recruitment of the dynein microtubule motor. Remarkably, Rab29 participates in a similar pathway in ciliated cells to promote primary cilium growth and ciliary localization of Smoothened. These results provide a function for Rab29 as a regulator of receptor recycling and identify this GTPase as a shared participant in IS and primary cilium assembly.
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Affiliation(s)
- A Onnis
- Department of Life Sciences, University of Siena, 53100 Siena, Italy
| | - F Finetti
- Department of Life Sciences, University of Siena, 53100 Siena, Italy
| | - L Patrussi
- Department of Life Sciences, University of Siena, 53100 Siena, Italy
| | - M Gottardo
- Department of Life Sciences, University of Siena, 53100 Siena, Italy
| | - C Cassioli
- Department of Life Sciences, University of Siena, 53100 Siena, Italy
| | - S Spanò
- School of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK
| | - C T Baldari
- Department of Life Sciences, University of Siena, 53100 Siena, Italy
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Abstract
Membrane fission is essential in various intracellular dissociative transport steps. The molecular mechanisms by which endocytic vesicles detach from the plasma membrane are being rapidly elucidated. Much less is known about the fission mechanisms operating at Golgi tubular networks; these include the Golgi transport and sorting stations, the trans-Golgi and cis-Golgi networks, where the geometry and physical properties of the membranes differ from those at the cell surface. Here we discuss the lipid and protein machineries that have so far been related to the fission process, with emphasis on those acting in the Golgi complex.
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Affiliation(s)
- D Corda
- Department of Cell Biology and Oncology, Istituto di Ricerche Farmacologiche Mario Negri, Consorzio Mario Negri Sud, Via Nazionale, 66030 Santa Maria Imbaro, Chieti, Italy.
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11
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Weigert R, Silletta MG, Spanò S, Turacchio G, Cericola C, Colanzi A, Senatore S, Mancini R, Polishchuk EV, Salmona M, Facchiano F, Burger KN, Mironov A, Luini A, Corda D. CtBP/BARS induces fission of Golgi membranes by acylating lysophosphatidic acid. Nature 1999; 402:429-33. [PMID: 10586885 DOI: 10.1038/46587] [Citation(s) in RCA: 246] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Membrane fission is essential in intracellular transport. Acyl-coenzyme As (acyl-CoAs) are important in lipid remodelling and are required for fission of COPI-coated vesicles. Here we show that CtBP/BARS, a protein that functions in the dynamics of Golgi tubules, is an essential component of the fission machinery operating at Golgi tubular networks, including Golgi compartments involved in protein transport and sorting. CtBP/BARS-induced fission was preceded by the formation of constricted sites in Golgi tubules, whose extreme curvature is likely to involve local changes in the membrane lipid composition. We find that CtBP/BARS uses acyl-CoA to selectively catalyse the acylation of lysophosphatidic acid to phosphatidic acid both in pure lipidic systems and in Golgi membranes, and that this reaction is essential for fission. Our results indicate a key role for lipid metabolic pathways in membrane fission.
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Affiliation(s)
- R Weigert
- Department of Cell Biology and Oncology, Istituto di Ricerche Farmacologiche Mario Negri, Santa Maria Imbaro (Chieti), Italy
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12
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Spanò S, Silletta MG, Colanzi A, Alberti S, Fiucci G, Valente C, Fusella A, Salmona M, Mironov A, Luini A, Corda D, Spanfò S. Molecular cloning and functional characterization of brefeldin A-ADP-ribosylated substrate. A novel protein involved in the maintenance of the Golgi structure. J Biol Chem 1999; 274:17705-10. [PMID: 10364211 DOI: 10.1074/jbc.274.25.17705] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Brefeldin A (BFA) is a fungal metabolite that disassembles the Golgi apparatus into tubular networks and causes the dissociation of coatomer proteins from Golgi membranes. We have previously shown that an additional effect of BFA is to stimulate the ADP-ribosylation of two cytosolic proteins of 38 and 50 kDa (brefeldin A-ADP-riboslyated substrate (BARS)) and that this effect greatly facilitates the Golgi-disassembling activity of the toxin. In this study, BARS has been purified from rat brain cytosol and microsequenced, and the BARS cDNA has been cloned. BARS shares high homology with two known proteins, C-terminal-binding protein 1 (CtBP1) and CtBP2. It is therefore a third member of the CtBP family. The role of BARS in Golgi disassembly by BFA was verified in permeabilized cells. In the presence of dialyzed cytosol that had been previously depleted of BARS or treated with an anti-BARS antibody, BFA potently disassembled the Golgi. However, in cytosol complemented with purified BARS, or even in control cytosols containing physiological levels of BARS, the action of BFA on Golgi disassembly was strongly inhibited. These results suggest that BARS exerts a negative control on Golgi tubulation, with important consequences for the structure and function of the Golgi complex.
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Affiliation(s)
- S Spanò
- Istituto di Ricerche Farmacologiche "Mario Negri", Department of Cell Biology and Oncology, Consorzio Mario Negri Sud, 66030 Santa Maria Imbaro (Chieti), 20157 Milano, Italy
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13
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Cavaliere V, Spanò S, Andrenacci D, Cortesi L, Gargiulo G. Regulatory elements in the promoter of the vitelline membrane gene VM32E of Drosophila melanogaster direct gene expression in distinct domains of the follicular epithelium. Mol Gen Genet 1997; 254:231-7. [PMID: 9150256 DOI: 10.1007/s004380050411] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The Drosophila vitelline membrane protein gene VM32E is expressed according to a precise temporal and spatial program in the follicle cells. Results from germ line transformation experiments using different fragments of the -465/-39 VM32E region fused to the hsp/lacZ reporter gene revealed that the region -348/-39 is sufficient to confer the wild-type expression pattern. Within this segment, distinct cis-regulatory elements control VM32E expression in ventral and dorsal follicle cells. The region between -135/-113 is essential for expression of the VM32E gene in the ventral columnar follicle cells. Expression in the dorsal domain requires the two regions -348/-254 and -118/-39. Furthermore, the region -253/-119 appears to contain a negative element that represses gene activity in anterior centripetal cells. We suggest that the expression of the VM32E gene throughout the follicular epithelium is controlled by specific cis-regulatory elements acting in distinct spatial domains and following a precise developmental program.
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Affiliation(s)
- V Cavaliere
- Dipartimento di Biologia Evoluzionistica Sperimentale, Università di Bologna, Italy
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