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Loconte L, Arguedas D, El R, Zhou A, Chipont A, Guyonnet L, Guerin C, Piovesana E, Vázquez‐Ibar JL, Joliot A, Théry C, Martín‐Jaular L. Detection of the interactions of tumour derived extracellular vesicles with immune cells is dependent on EV-labelling methods. J Extracell Vesicles 2023; 12:e12384. [PMID: 38031976 PMCID: PMC10687762 DOI: 10.1002/jev2.12384] [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] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 10/18/2023] [Accepted: 11/06/2023] [Indexed: 12/01/2023] Open
Abstract
Cell-cell communication within the complex tumour microenvironment is critical to cancer progression. Tumor-derived extracellular vesicles (TD-EVs) are key players in this process. They can interact with immune cells and modulate their activity, either suppressing or activating the immune system. Deciphering the interactions between TD-EVs and immune cells is essential to understand immune modulation by cancer cells. Fluorescent labelling of TD-EVs is a method of choice to study such interaction. This work aims to determine the impact of EV labelling methods on the detection by imaging flow cytometry and multicolour spectral flow cytometry of EV interaction and capture by the different immune cell types within human Peripheral Blood Mononuclear Cells (PBMCs). EVs released by the triple-negative breast carcinoma cell line MDA-MB-231 were labelled either with the lipophilic dye MemGlow-488 (MG-488), Carboxyfluorescein diacetate, succinimidyl ester (CFDA-SE) or through ectopic expression of a MyrPalm-superFolderGFP reporter (mp-sfGFP), which incorporates into EVs during their biogenesis. Our results show that these labelling strategies, although analysed with the same techniques, led to diverging results. While MG-488-labelled EVs incorporate in all cell types, CFSE-labelled EVs are restricted to a minor subset of cells and mp-sfGFP-labelled EVs are mainly detected in CD14+ monocytes which are the main uptakers of EVs and other particles, regardless of the labelling method. Furthermore, our results show that the method used for EV labelling influences the detection of the different types of EV interactions with the recipient cells. Specifically, MG-488, CFSE and mp-sfGFP result in observation suggesting, respectively, transient EV-PM interaction that results in dye transfer, EV content delivery, and capture of intact EVs. Consequently, the type of EV labelling method has to be considered as they can provide complementary information on various types of EV-cell interaction and EV fate.
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Affiliation(s)
- Luisa Loconte
- Institut Curie, PSL UniversityInserm U932Immunity and CancerParisFrance
- Istituto Pasteur Italia‐Fondazione Cenci Bolognetti, Department of Molecular MedicineSapienza’ University of RomeRomeItaly
| | - Davinia Arguedas
- Institut Curie, PSL UniversityInserm U932Immunity and CancerParisFrance
| | - Rojbin El
- Institut Curie, PSL UniversityInserm U932Immunity and CancerParisFrance
| | - Alix Zhou
- Institut Curie, PSL UniversityInserm U932Immunity and CancerParisFrance
- Institut Curie centre de rechercheCurieCoretech Extracellular VesiclesParisFrance
| | - Anna Chipont
- Institut Curie centre de rechercheCurieCoretech Cytometry PlatformParisFrance
| | - Lea Guyonnet
- Institut Curie centre de rechercheCurieCoretech Cytometry PlatformParisFrance
| | - Coralie Guerin
- Institut Curie centre de rechercheCurieCoretech Extracellular VesiclesParisFrance
- Institut Curie centre de rechercheCurieCoretech Cytometry PlatformParisFrance
| | - Ester Piovesana
- Institut Curie, PSL UniversityInserm U932Immunity and CancerParisFrance
| | - José Luis Vázquez‐Ibar
- Université Paris‐Saclay, CEA, CNRSInstitute for Integrative Biology of the Cell (I2BC)Gif‐sur‐YvetteFrance
| | - Alain Joliot
- Institut Curie, PSL UniversityInserm U932Immunity and CancerParisFrance
| | - Clotilde Théry
- Institut Curie, PSL UniversityInserm U932Immunity and CancerParisFrance
- Institut Curie centre de rechercheCurieCoretech Extracellular VesiclesParisFrance
| | - Lorena Martín‐Jaular
- Institut Curie, PSL UniversityInserm U932Immunity and CancerParisFrance
- Institut Curie centre de rechercheCurieCoretech Extracellular VesiclesParisFrance
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2
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Ursino C, Mouric C, Gros L, Bonnefoy N, Faget J. Intrinsic features of the cancer cell as drivers of immune checkpoint blockade response and refractoriness. Front Immunol 2023; 14:1170321. [PMID: 37180110 PMCID: PMC10169604 DOI: 10.3389/fimmu.2023.1170321] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 04/11/2023] [Indexed: 05/15/2023] Open
Abstract
Immune checkpoint blockade represents the latest revolution in cancer treatment by substantially increasing patients' lifetime and quality of life in multiple neoplastic pathologies. However, this new avenue of cancer management appeared extremely beneficial in a minority of cancer types and the sub-population of patients that would benefit from such therapies remain difficult to predict. In this review of the literature, we have summarized important knowledge linking cancer cell characteristics with the response to immunotherapy. Mostly focused on lung cancer, our objective was to illustrate how cancer cell diversity inside a well-defined pathology might explain sensitivity and refractoriness to immunotherapies. We first discuss how genomic instability, epigenetics and innate immune signaling could explain differences in the response to immune checkpoint blockers. Then, in a second part we detailed important notions suggesting that altered cancer cell metabolism, specific oncogenic signaling, tumor suppressor loss as well as tight control of the cGAS/STING pathway in the cancer cells can be associated with resistance to immune checkpoint blockade. At the end, we discussed recent evidences that could suggest that immune checkpoint blockade as first line therapy might shape the cancer cell clones diversity and give rise to the appearance of novel resistance mechanisms.
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Affiliation(s)
| | | | | | | | - Julien Faget
- Institut de Recherche en Cancérologie de Montpellier (IRCM), Inserm U1194, Univ Montpellier, Institut du Cancer de Montpellier (ICM), Montpellier, France
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3
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Kitsara M, Revet G, Vartanian-Grimaldi JS, Simon A, Minguy M, Miche A, Humblot V, Dufour T, Agbulut O. Cyto- and bio-compatibility assessment of plasma-treated polyvinylidene fluoride scaffolds for cardiac tissue engineering. Front Bioeng Biotechnol 2022; 10:1008436. [PMID: 36406217 PMCID: PMC9672675 DOI: 10.3389/fbioe.2022.1008436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 10/19/2022] [Indexed: 11/06/2022] Open
Abstract
As part of applications dealing with cardiovascular tissue engineering, drop-cast polyvinylidene fluoride (PVDF) scaffolds have been treated by cold plasma to enhance their adherence to cardiac cells. The scaffolds were treated in a dielectric barrier device where cold plasma was generated in a gaseous environment combining a carrier gas (helium or argon) with/without a reactive gas (molecular nitrogen). We show that an Ar-N2 plasma treatment of 10 min results in significant hydrophilization of the scaffolds, with contact angles as low as 52.4° instead of 132.2° for native PVDF scaffolds. Correlation between optical emission spectroscopy and X-ray photoelectron spectroscopy shows that OH radicals from the plasma phase can functionalize the surface scaffolds, resulting in improved wettability. For all plasma-treated PVDF scaffolds, the adhesion and maturation of primary cardiomyocytes is increased, showing a well-organized sarcomeric structure (α-actinin immunostaining). The efficacy of plasma treatment was also supported by real-time PCR analysis to demonstrate an increased expression of the genes related to adhesion and cardiomyocyte function. Finally, the biocompatibility of the PVDF scaffolds was studied in a cardiac environment, after implantation of acellular scaffolds on the surface of the heart of healthy mice. Seven and 28 days after implantation, no exuberant fibrosis and no multinucleated giant cells were visible in the grafted area, hence demonstrating the absence of foreign body reaction and the biocompatibility of these scaffolds.
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Affiliation(s)
- Maria Kitsara
- UMR CNRS 8256, INSERM ERL 1164, Biological Adaptation and Ageing, Institut de Biologie Paris-Seine, Sorbonne Université, Paris, France
- *Correspondence: Maria Kitsara, ; Thierry Dufour, ; Onnik Agbulut,
| | - Gaëlle Revet
- UMR CNRS 8256, INSERM ERL 1164, Biological Adaptation and Ageing, Institut de Biologie Paris-Seine, Sorbonne Université, Paris, France
| | - Jean-Sébastien Vartanian-Grimaldi
- UMR CNRS 8256, INSERM ERL 1164, Biological Adaptation and Ageing, Institut de Biologie Paris-Seine, Sorbonne Université, Paris, France
| | - Alexandre Simon
- UMR CNRS 8256, INSERM ERL 1164, Biological Adaptation and Ageing, Institut de Biologie Paris-Seine, Sorbonne Université, Paris, France
| | - Mathilde Minguy
- UMR CNRS 8256, INSERM ERL 1164, Biological Adaptation and Ageing, Institut de Biologie Paris-Seine, Sorbonne Université, Paris, France
| | - Antoine Miche
- UMR CNRS 7197, Laboratoire de Réactivité de Surface, Sorbonne Université, Paris, France
| | - Vincent Humblot
- UMR CNRS 7197, Laboratoire de Réactivité de Surface, Sorbonne Université, Paris, France
- UMR 6174 CNRS, FEMTO-ST Institute, Université Bourgogne Franche-Comté, Besançon, France
| | - Thierry Dufour
- UMR CNRS 7648, Laboratoire de Physique des Plasmas, Sorbonne Université, Paris, France
- *Correspondence: Maria Kitsara, ; Thierry Dufour, ; Onnik Agbulut,
| | - Onnik Agbulut
- UMR CNRS 8256, INSERM ERL 1164, Biological Adaptation and Ageing, Institut de Biologie Paris-Seine, Sorbonne Université, Paris, France
- *Correspondence: Maria Kitsara, ; Thierry Dufour, ; Onnik Agbulut,
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Tran Van Nhieu G, Latour-Lambert P, Enninga J. Modification of phosphoinositides by the Shigella effector IpgD during host cell infection. Front Cell Infect Microbiol 2022; 12:1012533. [PMID: 36389142 PMCID: PMC9647168 DOI: 10.3389/fcimb.2022.1012533] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 09/27/2022] [Indexed: 09/15/2023] Open
Abstract
Shigella, the causative agent of bacillary dysentery, subvert cytoskeletal and trafficking processes to invade and replicate in epithelial cells using an arsenal of bacterial effectors translocated through a type III secretion system. Here, we review the various roles of the type III effector IpgD, initially characterized as phosphatidylinositol 4,5 bisphosphate (PI4,5P2) 4-phosphatase. By decreasing PI4,5P2 levels, IpgD triggers the disassembly of cortical actin filaments required for bacterial invasion and cell migration. PI5P produced by IpgD further stimulates signaling pathways regulating cell survival, macropinosome formation, endosomal trafficking and dampening of immune responses. Recently, IpgD was also found to exhibit phosphotransferase activity leading to PI3,4P2 synthesis adding a new flavor to this multipotent bacterial enzyme. The substrate of IpgD, PI4,5P2 is also the main substrate hydrolyzed by endogenous phospholipases C to produce inositoltriphosphate (InsP3), a major Ca2+ second messenger. Hence, beyond the repertoire of effects associated with the direct diversion of phoshoinositides, IpgD indirectly down-regulates InsP3-mediated Ca2+ release by limiting InsP3 production. Furthermore, IpgD controls the intracellular lifestyle of Shigella promoting Rab8/11 -dependent recruitment of the exocyst at macropinosomes to remove damaged vacuolar membrane remnants and promote bacterial cytosolic escape. IpgD thus emerges as a key bacterial effector for the remodeling of host cell membranes.
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Affiliation(s)
- Guy Tran Van Nhieu
- Institute for Integrative Biology of the Cell – Centre National de la Recherche Scientifique (CNRS) UMR9198 - Institut National de la Santé et de la Recherche Médicale (Inserm) U1280, Team Calcium Signaling and Microbial Infections, Gif-sur-Yvette, France
| | - Patricia Latour-Lambert
- Institut Pasteur, Unité Dynamique des interactions hôtes-pathogènes and Centre National de la Recherche Scientifique (CNRS) UMR3691, Université de Paris Cité, Paris, France
| | - Jost Enninga
- Institut Pasteur, Unité Dynamique des interactions hôtes-pathogènes and Centre National de la Recherche Scientifique (CNRS) UMR3691, Université de Paris Cité, Paris, France
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5
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Rozière J, Guichard C, Brunaud V, Martin ML, Coursol S. A comprehensive map of preferentially located motifs reveals distinct proximal cis-regulatory sequences in plants. Front Plant Sci 2022; 13:976371. [PMID: 36311095 PMCID: PMC9597372 DOI: 10.3389/fpls.2022.976371] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
Identification of cis-regulatory sequences controlling gene expression is an arduous challenge that is being actively explored to discover key genetic factors responsible for traits of agronomic interest. Here, we used a genome-wide de novo approach to investigate preferentially located motifs (PLMs) in the proximal cis-regulatory landscape of Arabidopsis thaliana and Zea mays. We report three groups of PLMs in both the 5'- and 3'-gene-proximal regions and emphasize conserved PLMs in both species, particularly in the 3'-gene-proximal region. Comparison with resources from transcription factor and microRNA binding sites shows that 79% of the identified PLMs are unassigned, although some are supported by MNase-defined cistrome occupancy analysis. Enrichment analyses further reveal that unassigned PLMs provide functional predictions that differ from those derived from transcription factor and microRNA binding sites. Our study provides a comprehensive map of PLMs and demonstrates their potential utility for future characterization of orphan genes in plants.
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Affiliation(s)
- Julien Rozière
- Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), Gif sur Yvette, France
- Université de Paris Cité, Institute of Plant Sciences Paris-Saclay (IPS2), Gif sur Yvette, France
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), Versailles, France
| | - Cécile Guichard
- Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), Gif sur Yvette, France
- Université de Paris Cité, Institute of Plant Sciences Paris-Saclay (IPS2), Gif sur Yvette, France
| | - Véronique Brunaud
- Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), Gif sur Yvette, France
- Université de Paris Cité, Institute of Plant Sciences Paris-Saclay (IPS2), Gif sur Yvette, France
| | - Marie-Laure Martin
- Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), Gif sur Yvette, France
- Université de Paris Cité, Institute of Plant Sciences Paris-Saclay (IPS2), Gif sur Yvette, France
- Université Paris-Saclay, INRAE, AgroParisTech, UMR MIA-Paris-Saclay, Palaiseau, France
| | - Sylvie Coursol
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), Versailles, France
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6
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Luk CH, Enninga J, Valenzuela C. Fit to dwell in many places – The growing diversity of intracellular Salmonella niches. Front Cell Infect Microbiol 2022; 12:989451. [PMID: 36061869 PMCID: PMC9433700 DOI: 10.3389/fcimb.2022.989451] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 07/25/2022] [Indexed: 11/21/2022] Open
Abstract
Salmonella enterica is capable of invading different host cell types including epithelial cells and M cells during local infection, and immune cells and fibroblasts during the subsequent systemic spread. The intracellular lifestyles of Salmonella inside different cell types are remarkable for their distinct residential niches, and their varying replication rates. To study this, researchers have employed different cell models, such as various epithelial cells, immune cells, and fibroblasts. In epithelial cells, S. Typhimurium dwells within modified endolysosomes or gains access to the host cytoplasm. In the cytoplasm, the pathogen is exposed to the host autophagy machinery or poised for rapid multiplication, whereas it grows at a slower rate or remains dormant within the endomembrane-bound compartments. The swift bimodal lifestyle is not observed in fibroblasts and immune cells, and it emerges that these cells handle intracellular S. Typhimurium through different clearance machineries. Moreover, in these cell types S. Typhimurium grows withing modified phagosomes of distinct functional composition by adopting targeted molecular countermeasures. The preference for one or the other intracellular niche and the diverse cell type-specific Salmonella lifestyles are determined by the complex interactions between a myriad of bacterial effectors and host factors. It is important to understand how this communication is differentially regulated dependent on the host cell type and on the distinct intracellular growth rate. To support the efforts in deciphering Salmonella invasion across the different infection models, we provide a systematic comparison of the findings yielded from cell culture models. We also outline the future directions towards a better understanding of these differential Salmonella intracellular lifestyles.
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Affiliation(s)
- Chak Hon Luk
- Institut Pasteur, Unité « Dynamique des interactions hôte-pathogène » and CNRS UMR3691, Université de Paris Cité, Paris, France
- Host-Pathogen Interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, United Kingdom
- *Correspondence: Chak Hon Luk, ; Camila Valenzuela,
| | - Jost Enninga
- Institut Pasteur, Unité « Dynamique des interactions hôte-pathogène » and CNRS UMR3691, Université de Paris Cité, Paris, France
| | - Camila Valenzuela
- Institut Pasteur, Unité « Dynamique des interactions hôte-pathogène » and CNRS UMR3691, Université de Paris Cité, Paris, France
- *Correspondence: Chak Hon Luk, ; Camila Valenzuela,
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Silvestre A, Shintre SS, Rachidi N. Released Parasite-Derived Kinases as Novel Targets for Antiparasitic Therapies. Front Cell Infect Microbiol 2022; 12:825458. [PMID: 35252034 PMCID: PMC8893276 DOI: 10.3389/fcimb.2022.825458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 01/25/2022] [Indexed: 11/13/2022] Open
Abstract
The efficient manipulation of their host cell is an essential feature of intracellular parasites. Most molecular mechanisms governing the subversion of host cell by protozoan parasites involve the release of parasite-derived molecules into the host cell cytoplasm and direct interaction with host proteins. Among these released proteins, kinases are particularly important as they govern the subversion of important host pathways, such as signalling or metabolic pathways. These enzymes, which catalyse the transfer of a phosphate group from ATP onto serine, threonine, tyrosine or histidine residues to covalently modify proteins, are involved in numerous essential biological processes such as cell cycle or transport. Although little is known about the role of most of the released parasite-derived kinases in the host cell, they are examples of kinases hijacking host cellular pathways such as signal transduction or apoptosis, which are essential for immune response evasion as well as parasite survival and development. Here we present the current knowledge on released protozoan kinases and their involvement in host-pathogen interactions. We also highlight the knowledge gaps remaining before considering those kinases - involved in host signalling subversion - as antiparasitic drug targets.
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Affiliation(s)
- Anne Silvestre
- INRAE, Université de Tours, ISP, Nouzilly, France
- *Correspondence: Anne Silvestre, ; Najma Rachidi,
| | - Sharvani Shrinivas Shintre
- INRAE, Université de Tours, ISP, Nouzilly, France
- Institut Pasteur, Université de Paris and INSERM U1201, Unité de Parasitologie Moléculaire et Signalisation, Paris, France
| | - Najma Rachidi
- Institut Pasteur, Université de Paris and INSERM U1201, Unité de Parasitologie Moléculaire et Signalisation, Paris, France
- *Correspondence: Anne Silvestre, ; Najma Rachidi,
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8
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Luneau JS, Cerutti A, Roux B, Carrère S, Jardinaud M, Gaillac A, Gris C, Lauber E, Berthomé R, Arlat M, Boulanger A, Noël LD. Xanthomonas transcriptome inside cauliflower hydathodes reveals bacterial virulence strategies and physiological adaptations at early infection stages. Mol Plant Pathol 2022; 23:159-174. [PMID: 34837293 PMCID: PMC8743013 DOI: 10.1111/mpp.13117] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/22/2021] [Accepted: 07/22/2021] [Indexed: 06/01/2023]
Abstract
Xanthomonas campestris pv. campestris (Xcc) is a seed-transmitted vascular pathogen causing black rot disease on cultivated and wild Brassicaceae. Xcc enters the plant tissues preferentially via hydathodes, which are organs localized at leaf margins. To decipher both physiological and virulence strategies deployed by Xcc during early stages of infection, the transcriptomic profile of Xcc was analysed 3 days after entry into cauliflower hydathodes. Despite the absence of visible plant tissue alterations and despite a biotrophic lifestyle, 18% of Xcc genes were differentially expressed, including a striking repression of chemotaxis and motility functions. The Xcc full repertoire of virulence factors had not yet been activated but the expression of the HrpG regulon composed of 95 genes, including genes coding for the type III secretion machinery important for suppression of plant immunity, was induced. The expression of genes involved in metabolic adaptations such as catabolism of plant compounds, transport functions, sulphur and phosphate metabolism was upregulated while limited stress responses were observed 3 days postinfection. We confirmed experimentally that high-affinity phosphate transport is needed for bacterial fitness inside hydathodes. This analysis provides information about the nutritional and stress status of bacteria during the early biotrophic infection stages and helps to decipher the adaptive strategy of Xcc to the hydathode environment.
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Affiliation(s)
- Julien S. Luneau
- LIPME, Université de Toulouse, INRAE, CNRS, Université Paul SabatierCastanet‐TolosanFrance
| | - Aude Cerutti
- LIPME, Université de Toulouse, INRAE, CNRS, Université Paul SabatierCastanet‐TolosanFrance
| | - Brice Roux
- LIPME, Université de Toulouse, INRAE, CNRS, Université Paul SabatierCastanet‐TolosanFrance
- Present address:
Brice Roux, HalioDx, Luminy Biotech EntreprisesMarseille Cedex 9France
| | - Sébastien Carrère
- LIPME, Université de Toulouse, INRAE, CNRS, Université Paul SabatierCastanet‐TolosanFrance
| | | | - Antoine Gaillac
- LIPME, Université de Toulouse, INRAE, CNRS, Université Paul SabatierCastanet‐TolosanFrance
| | - Carine Gris
- LIPME, Université de Toulouse, INRAE, CNRS, Université Paul SabatierCastanet‐TolosanFrance
| | - Emmanuelle Lauber
- LIPME, Université de Toulouse, INRAE, CNRS, Université Paul SabatierCastanet‐TolosanFrance
| | - Richard Berthomé
- LIPME, Université de Toulouse, INRAE, CNRS, Université Paul SabatierCastanet‐TolosanFrance
| | - Matthieu Arlat
- LIPME, Université de Toulouse, INRAE, CNRS, Université Paul SabatierCastanet‐TolosanFrance
| | - Alice Boulanger
- LIPME, Université de Toulouse, INRAE, CNRS, Université Paul SabatierCastanet‐TolosanFrance
| | - Laurent D. Noël
- LIPME, Université de Toulouse, INRAE, CNRS, Université Paul SabatierCastanet‐TolosanFrance
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9
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Ziveri J, Chhuon C, Jamet A, Rytter H, Prigent G, Tros F, Barel M, Coureuil M, Lays C, Henry T, Keep NH, Guerrera IC, Charbit A. Critical Role of a Sheath Phosphorylation Site On the Assembly and Function of an Atypical Type VI Secretion System. Mol Cell Proteomics 2019; 18:2418-2432. [PMID: 31578219 PMCID: PMC6885697 DOI: 10.1074/mcp.ra119.001532] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 09/03/2019] [Indexed: 12/12/2022] Open
Abstract
The bacterial pathogen Francisella tularensis possesses a noncanonical type VI secretion system (T6SS) that is required for phagosomal escape in infected macrophages. KCl stimulation has been previously used to trigger assembly and secretion of the T6SS in culture. By differential proteomics, we found here that the amounts of the T6SS proteins remained unchanged upon KCl stimulation, suggesting involvement of post-translational modifications in T6SS assembly. A phosphoproteomic analysis indeed identified a unique phosphorylation site on IglB, a key component of the T6SS sheath. Substitutions of Y139 with alanine or phosphomimetics prevented T6SS formation and abolished phagosomal escape whereas substitution with phenylalanine delayed but did not abolish phagosomal escape in J774-1 macrophages. Altogether our data demonstrated that the Y139 site of IglB plays a critical role in T6SS biogenesis, suggesting that sheath phosphorylation could participate to T6SS dynamics.Data are available via ProteomeXchange with identifier PXD013619; and on MS-Viewer, key lkaqkllxwx.
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Affiliation(s)
- Jason Ziveri
- Université Paris Descartes, Sorbonne Paris Cité, INSERM U1151-CNRS UMR 8253, Institut Necker-Enfants Malades. Team 7: Pathogenesis of Systemic Infections, Paris 75015, France; Plateforme protéomique 3P5-Necker, Universit[c33c]zpi;● Paris Descartes - Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris 75015, France
| | - Cerina Chhuon
- Plateforme protéomique 3P5-Necker, Universit[c33c]zpi;● Paris Descartes - Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris 75015, France; Plateforme protéomique 3P5-Necker, Universit[c33c]zpi;● Paris Descartes - Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris 75015, France
| | - Anne Jamet
- Université Paris Descartes, Sorbonne Paris Cité, INSERM U1151-CNRS UMR 8253, Institut Necker-Enfants Malades. Team 7: Pathogenesis of Systemic Infections, Paris 75015, France; Plateforme protéomique 3P5-Necker, Universit[c33c]zpi;● Paris Descartes - Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris 75015, France
| | - Héloïse Rytter
- Université Paris Descartes, Sorbonne Paris Cité, INSERM U1151-CNRS UMR 8253, Institut Necker-Enfants Malades. Team 7: Pathogenesis of Systemic Infections, Paris 75015, France; Plateforme protéomique 3P5-Necker, Universit[c33c]zpi;● Paris Descartes - Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris 75015, France
| | - Guénolé Prigent
- Université Paris Descartes, Sorbonne Paris Cité, INSERM U1151-CNRS UMR 8253, Institut Necker-Enfants Malades. Team 7: Pathogenesis of Systemic Infections, Paris 75015, France; Plateforme protéomique 3P5-Necker, Universit[c33c]zpi;● Paris Descartes - Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris 75015, France
| | - Fabiola Tros
- Université Paris Descartes, Sorbonne Paris Cité, INSERM U1151-CNRS UMR 8253, Institut Necker-Enfants Malades. Team 7: Pathogenesis of Systemic Infections, Paris 75015, France; Plateforme protéomique 3P5-Necker, Universit[c33c]zpi;● Paris Descartes - Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris 75015, France
| | - Monique Barel
- Université Paris Descartes, Sorbonne Paris Cité, INSERM U1151-CNRS UMR 8253, Institut Necker-Enfants Malades. Team 7: Pathogenesis of Systemic Infections, Paris 75015, France; Plateforme protéomique 3P5-Necker, Universit[c33c]zpi;● Paris Descartes - Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris 75015, France
| | - Mathieu Coureuil
- Université Paris Descartes, Sorbonne Paris Cité, INSERM U1151-CNRS UMR 8253, Institut Necker-Enfants Malades. Team 7: Pathogenesis of Systemic Infections, Paris 75015, France; Plateforme protéomique 3P5-Necker, Universit[c33c]zpi;● Paris Descartes - Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris 75015, France
| | - Claire Lays
- CIRI, Centre International de Recherche en Infectiologie, Université Lyon, Inserm, U1111, University Claude Bernard Lyon 1, CNRS, UMR5308, École Normale Supérieure de Lyon, Labex ECOFECT, Eco-evolutionary dynamics of infectious diseases, F-69007, LYON, France
| | - Thomas Henry
- CIRI, Centre International de Recherche en Infectiologie, Université Lyon, Inserm, U1111, University Claude Bernard Lyon 1, CNRS, UMR5308, École Normale Supérieure de Lyon, Labex ECOFECT, Eco-evolutionary dynamics of infectious diseases, F-69007, LYON, France
| | - Nicholas H Keep
- Crystallography, Institute for Structural and Molecular Biology, Department of Biological Sciences Birkbeck, University of London, United Kingdom
| | - Ida Chiara Guerrera
- Plateforme protéomique 3P5-Necker, Universit[c33c]zpi;● Paris Descartes - Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris 75015, France; Plateforme protéomique 3P5-Necker, Universit[c33c]zpi;● Paris Descartes - Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris 75015, France.
| | - Alain Charbit
- Université Paris Descartes, Sorbonne Paris Cité, INSERM U1151-CNRS UMR 8253, Institut Necker-Enfants Malades. Team 7: Pathogenesis of Systemic Infections, Paris 75015, France; Plateforme protéomique 3P5-Necker, Universit[c33c]zpi;● Paris Descartes - Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS3633, Paris 75015, France.
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