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Hellani F, Leleu I, Saidi N, Martin N, Lecoeur C, Werkmeister E, Koffi D, Trottein F, Yapo-Etté H, Das B, Abbadie C, Pied S. Role of astrocyte senescence regulated by the non- canonical autophagy in the neuroinflammation associated to cerebral malaria. Brain Behav Immun 2024; 117:20-35. [PMID: 38157948 DOI: 10.1016/j.bbi.2023.12.030] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 12/12/2023] [Accepted: 12/21/2023] [Indexed: 01/03/2024] Open
Abstract
BACKGROUND Cerebral malaria (CM) is a fatal neuroinflammatory syndrome caused (in humans) by the protozoa Plasmodium (P.) falciparum. Glial cell activation is one of the mechanisms that contributes to neuroinflammation in CM. RESULT By studying a mouse model of CM (caused by P. berghei ANKA), we describe that the induction of autophagy promoted p21-dependent senescence in astrocytes and that CXCL-10 was part of the senescence-associated secretory phenotype. Furthermore, p21 expression was observed in post-mortem brain and peripheral blood samples from patients with CM. Lastly, we found that the depletion of senescent astrocytes with senolytic drugs abrogated inflammation and protected mice from CM. CONCLUSION Our data provide evidence for a novel mechanism through which astrocytes could be involved in the neuropathophysiology of CM. p21 gene expression in blood cell and an elevated plasma CXCL-10 concentration could be valuable biomarkers of CM in humans. In the end, we believe senolytic drugs shall open up new avenues to develop newer treatment options.
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Affiliation(s)
- Fatima Hellani
- Univ. Lille, CNRS UMR 9017-INSERM U1019, Center for Infection and Immunity of Lille-CIIL, Institut Pasteur de Lille F-59019 Lille, France
| | - Inès Leleu
- Univ. Lille, CNRS UMR 9017-INSERM U1019, Center for Infection and Immunity of Lille-CIIL, Institut Pasteur de Lille F-59019 Lille, France
| | - Nasreddine Saidi
- Univ. Lille, CNRS UMR 9017-INSERM U1019, Center for Infection and Immunity of Lille-CIIL, Institut Pasteur de Lille F-59019 Lille, France
| | - Nathalie Martin
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies F-59000 Lille, France
| | - Cécile Lecoeur
- Univ. Lille, CNRS UMR 9017-INSERM U1019, Center for Infection and Immunity of Lille-CIIL, Institut Pasteur de Lille F-59019 Lille, France
| | - Elisabeth Werkmeister
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, US 41 - UMS 2014 - PLBS F-59000 Lille, France
| | - David Koffi
- Parasitology and Mycology Department, Institut Pasteur de Côte d'Ivoire, Ivory Coast
| | - François Trottein
- Univ. Lille, CNRS UMR 9017-INSERM U1019, Center for Infection and Immunity of Lille-CIIL, Institut Pasteur de Lille F-59019 Lille, France
| | - Hélène Yapo-Etté
- Institute of Forensic Medicine-Faculty of Health, University Félix Houphouët-Boigny of Abidjan, Ivory Coast
| | - Bidyut Das
- SCB Medical College, Cuttack, Orissa, India
| | - Corinne Abbadie
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies F-59000 Lille, France
| | - Sylviane Pied
- Univ. Lille, CNRS UMR 9017-INSERM U1019, Center for Infection and Immunity of Lille-CIIL, Institut Pasteur de Lille F-59019 Lille, France.
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Lefebvre A, Trioën C, Renaud S, Laine W, Hennart B, Bouchez C, Leroux B, Allorge D, Kluza J, Werkmeister E, Grolez GP, Delhem N, Moralès O. Extracellular vesicles derived from nasopharyngeal carcinoma induce the emergence of mature regulatory dendritic cells using a galectin-9 dependent mechanism. J Extracell Vesicles 2023; 12:e12390. [PMID: 38117000 PMCID: PMC10731827 DOI: 10.1002/jev2.12390] [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: 04/21/2023] [Revised: 11/02/2023] [Accepted: 11/13/2023] [Indexed: 12/21/2023] Open
Abstract
Nasopharyngeal carcinoma-derived small extracellular vesicles (NPCSEVs) have an immunosuppressive impact on the tumour microenvironment. In this study, we investigated their influence on the generation of tolerogenic dendritic cells and the potential involvement of the galectin-9 (Gal9) they carry in this process. We analysed the phenotype and immunosuppressive properties of NPCSEVs and explored the ability of DCs exposed to NPCSEVs (NPCSEV-DCs) to regulate T cell proliferation. To assess their impact at the pathophysiological level, we performed real-time fluorescent chemoattraction assays. Finally, we analysed phenotype and immunosuppressive functions of NPCSEV-DCs using a proprietary anti-Gal9 neutralising antibody to assess the role of Gal9 in this effect. We described that NPCSEV-DCs were able to inhibit T cell proliferation despite their mature phenotype. These mature regulatory DCs (mregDCs) have a specific oxidative metabolism and secrete high levels of IL-4. Chemoattraction assays revealed that NPCSEVs could preferentially recruit NPCSEV-DCs. Finally, and very interestingly, the reduction of the immunosuppressive function of NPCSEV-DCs using an anti-Gal9 antibody clearly suggested an important role for vesicular Gal9 in the induction of mregDCs. These results revealed for the first time that NPCSEVs promote the emergence of mregDCs using a galectin-9 dependent mechanism and open new perspectives for antitumour immunotherapy targeting NPCSEVs.
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Affiliation(s)
- Anthony Lefebvre
- Univ. Lille, Inserm, CHU Lille U1189 – ONCO‐THAI – Assisted Laser Therapy and Immunotherapy for OncologyLilleFrance
| | - Camille Trioën
- Univ. Lille, Inserm, CHU Lille U1189 – ONCO‐THAI – Assisted Laser Therapy and Immunotherapy for OncologyLilleFrance
| | - Sarah Renaud
- Univ. Lille, Inserm, CHU Lille U1189 – ONCO‐THAI – Assisted Laser Therapy and Immunotherapy for OncologyLilleFrance
| | - William Laine
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020‐U1277 ‐ CANTHER ‐ Cancer Heterogeneity Plasticity and Resistance to TherapiesLilleFrance
| | | | - Clément Bouchez
- Univ. Lille, Inserm, CHU Lille U1189 – ONCO‐THAI – Assisted Laser Therapy and Immunotherapy for OncologyLilleFrance
| | - Bertrand Leroux
- Univ. Lille, Inserm, CHU Lille U1189 – ONCO‐THAI – Assisted Laser Therapy and Immunotherapy for OncologyLilleFrance
| | | | - Jérôme Kluza
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020‐U1277 ‐ CANTHER ‐ Cancer Heterogeneity Plasticity and Resistance to TherapiesLilleFrance
| | - Elisabeth Werkmeister
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, US 41 – UAR 2014 – PLBSLilleFrance
| | - Guillaume Paul Grolez
- Univ. Lille, Inserm, CHU Lille U1189 – ONCO‐THAI – Assisted Laser Therapy and Immunotherapy for OncologyLilleFrance
| | - Nadira Delhem
- Univ. Lille, Inserm, CHU Lille U1189 – ONCO‐THAI – Assisted Laser Therapy and Immunotherapy for OncologyLilleFrance
| | - Olivier Moralès
- Univ. Lille, Inserm, CHU Lille U1189 – ONCO‐THAI – Assisted Laser Therapy and Immunotherapy for OncologyLilleFrance
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020‐U1277 ‐ CANTHER ‐ Cancer Heterogeneity Plasticity and Resistance to TherapiesLilleFrance
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3
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Quilbe A, Mustapha R, Duchêne B, Kumar A, Werkmeister E, Leteurtre E, Moralès O, Jonckheere N, Van Seuningen I, Delhem N. A novel anti-galectin-9 immunotherapy limits the early progression of pancreatic neoplastic lesions in transgenic mice. Front Immunol 2023; 14:1267279. [PMID: 38098486 PMCID: PMC10720041 DOI: 10.3389/fimmu.2023.1267279] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 11/10/2023] [Indexed: 12/17/2023] Open
Abstract
Background Pancreatic adenocarcinoma (PDAC) is a devastating disease with an urgent need for therapeutic innovation. Immune checkpoint inhibition has shown promise in a variety of solid tumors, but most clinical trials have failed to demonstrate clinical efficacy in PDAC. This low efficacy is partly explained by a highly immunosuppressive microenvironment, which dampens anti-tumor immunity through the recruitment or induction of immunosuppressive cells, particularly regulatory T cells (Tregs). In this context, our laboratory has developed a novel immunotherapeutic strategy aimed at inhibiting the suppressive activity of Tregs, based on a patented (EP3152234B1) monoclonal antibody (mAb) targeting galectin-9 (LGALS9). Materials and methods CD4+ conventional T cells (TCD4 or Tconv), Treg ratio, and LGALS9 expression were analyzed by immunohistochemistry (IHC) and cytometry in blood and pancreas of K-rasLSL.G12D/+;Pdx-1-Cre (KC) and K-rasWildType (WT);Pdx1-Cre (WT) mice aged 4-13 months. Pancreatic intraepithelial neoplasm (PanIN) progression and grade were quantified using FIJI software and validated by pathologists. The anti-galectin-9 mAb was validated for its use in mice on isolated murine C57BL/6 Treg by immunofluorescence staining and cytometry. Its specificity and functionality were validated in proliferation assays on rLGALS9-immunosuppressed murine Tconv and in suppression assays between murine Treg and Tconv. Finally, 2-month-old KC mice were treated with anti-LGALS9 and compared to WT mice for peripheral and infiltrating TCD4, Treg, and PanIN progression. Results IHC and cytometry revealed a significant increase in LGALS9 expression and Treg levels in the blood and pancreas of KC mice proportional to the stages of precancerous lesions. Although present in WT mice, LGALS9 is expressed at a basal level with low and restricted expression that increases slightly over time, while Treg cells are few in number in their circulation and even absent from the pancreas over time. Using our anti-LGALS9 mAb in mice, it is shown that (i) murine Treg express LGALS9, (ii) the mAb could target and inhibit recombinant murine LGALS9, and (iii) neutralize murine Treg suppressive activity. Finally, the anti-LGALS9 mAb in KC mice reduced (i) LGALS9 expression in pancreatic cancer cells, (ii) the Treg ratio, and (iii) the total surface area and grade of PanIN. Conclusion We demonstrate for the first time that an anti-LGALS9 antibody, by specifically targeting endogenous LGALS9 tumor and exogenous LGALS9 produced by Treg, was able to limit the progression of pancreatic neoplastic lesions in mice, opening up new prospects for its use as an immunotherapeutic tool in PDAC.
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Affiliation(s)
- Alexandre Quilbe
- Univ. Lille, Inserm, CHU Lille, U1189 - ONCO-THAI - Assisted Laser Therapy and Immunotherapy for Oncology, Lille, France
| | - Rami Mustapha
- Univ. Lille, Inserm, CHU Lille, U1189 - ONCO-THAI - Assisted Laser Therapy and Immunotherapy for Oncology, Lille, France
- Department of Cancer Studies and Pharmaceutical Sciences New Hunt’s House, School of Life Sciences and Medicine, King’s College London, London, United Kingdom
| | - Belinda Duchêne
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277 - CANTHER – Cancer Heterogeneity Plasticity and Resistance to Therapies, Lille, France
| | - Abhishek Kumar
- Univ. Lille, Inserm, CHU Lille, U1189 - ONCO-THAI - Assisted Laser Therapy and Immunotherapy for Oncology, Lille, France
| | - Elisabeth Werkmeister
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US 41 - UMS 2014 -PLBS, Lille, France
| | - Emmanuelle Leteurtre
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277 - CANTHER – Cancer Heterogeneity Plasticity and Resistance to Therapies, Lille, France
| | - Olivier Moralès
- Univ. Lille, Inserm, CHU Lille, U1189 - ONCO-THAI - Assisted Laser Therapy and Immunotherapy for Oncology, Lille, France
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277 - CANTHER – Cancer Heterogeneity Plasticity and Resistance to Therapies, Lille, France
| | - Nicolas Jonckheere
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277 - CANTHER – Cancer Heterogeneity Plasticity and Resistance to Therapies, Lille, France
| | - Isabelle Van Seuningen
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277 - CANTHER – Cancer Heterogeneity Plasticity and Resistance to Therapies, Lille, France
| | - Nadira Delhem
- Univ. Lille, Inserm, CHU Lille, U1189 - ONCO-THAI - Assisted Laser Therapy and Immunotherapy for Oncology, Lille, France
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Fernandes M, Paget S, Kherrouche Z, Truong MJ, Vinchent A, Meneboo JP, Sebda S, Werkmeister E, Descarpentries C, Figeac M, Cortot AB, Tulasne D. Transforming properties of MET receptor exon 14 skipping can be recapitulated by loss of the CBL ubiquitin ligase binding site. FEBS Lett 2023; 597:2301-2315. [PMID: 37468447 DOI: 10.1002/1873-3468.14702] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 06/07/2023] [Accepted: 06/19/2023] [Indexed: 07/21/2023]
Abstract
MET is a receptor tyrosine kinase that is activated in many cancers through various mechanisms. MET exon 14 (Ex14) skipping occurs in 3% of nonsmall cell lung tumors. However, the contribution of the regulatory sites lost upon this skipping, which include a phosphorylated serine (S985) and a binding site for the E3 ubiquitin ligase CBL (Y1003), remains elusive. Sequencing of 2808 lung tumors revealed 71 mutations leading to MET exon 14 skipping and three mutations affecting Y1003 or S985. In addition, MET exon 14 skipping and MET Y1003F induced similar transcriptional programs, increased the activation of downstream signaling pathways, and increased cell mobility. Therefore, the MET Y1003F mutation is able to fully recapitulate responses induced by MET exon 14 skipping, suggesting that loss of the CBL binding site is the main contributor of cell transformation induced by MET Ex14 mutations.
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Affiliation(s)
- Marie Fernandes
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020 - UMR1277 - Canther - Cancer Heterogeneity, Plasticity and Resistance to Therapies, Univ. Lille, France
| | - Sonia Paget
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020 - UMR1277 - Canther - Cancer Heterogeneity, Plasticity and Resistance to Therapies, Univ. Lille, France
| | - Zoulika Kherrouche
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020 - UMR1277 - Canther - Cancer Heterogeneity, Plasticity and Resistance to Therapies, Univ. Lille, France
| | - Marie-José Truong
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020 - UMR1277 - Canther - Cancer Heterogeneity, Plasticity and Resistance to Therapies, Univ. Lille, France
| | - Audrey Vinchent
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020 - UMR1277 - Canther - Cancer Heterogeneity, Plasticity and Resistance to Therapies, Univ. Lille, France
| | - Jean-Pascal Meneboo
- Plateau de Génomique Fonctionnelle et Structurale, CHU Lille, Univ. Lille, France
| | - Shéhérazade Sebda
- Plateau de Génomique Fonctionnelle et Structurale, CHU Lille, Univ. Lille, France
| | - Elisabeth Werkmeister
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US41 - UMS2014 - PLBS, Univ. Lille, France
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR9017 - CIIL - Center for Infection and Immunity of Lille, Univ. Lille, France
| | | | - Martin Figeac
- Plateau de Génomique Fonctionnelle et Structurale, CHU Lille, Univ. Lille, France
| | - Alexis B Cortot
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020 - UMR1277 - Canther - Cancer Heterogeneity, Plasticity and Resistance to Therapies, Univ. Lille, France
- Thoracic Oncology Department, CHU Lille, Univ. Lille, France
| | - David Tulasne
- CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020 - UMR1277 - Canther - Cancer Heterogeneity, Plasticity and Resistance to Therapies, Univ. Lille, France
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5
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Cuffaro B, Boutillier D, Desramaut J, Jablaoui A, Werkmeister E, Trottein F, Waligora-Dupriet AJ, Rhimi M, Maguin E, Grangette C. Characterization of Two Parabacteroides distasonis Candidate Strains as New Live Biotherapeutics against Obesity. Cells 2023; 12:cells12091260. [PMID: 37174660 PMCID: PMC10177344 DOI: 10.3390/cells12091260] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 12/27/2022] [Revised: 04/03/2023] [Accepted: 04/16/2023] [Indexed: 05/15/2023] Open
Abstract
The gut microbiota is now considered as a key player in the development of metabolic dysfunction. Therefore, targeting gut microbiota dysbiosis has emerged as a new therapeutic strategy, notably through the use of live gut microbiota-derived biotherapeutics. We previously highlighted the anti-inflammatory abilities of two Parabacteroides distasonis strains. We herein evaluate their potential anti-obesity abilities and show that the two strains induced the secretion of the incretin glucagon-like peptide 1 in vitro and limited weight gain and adiposity in obese mice. These beneficial effects are associated with reduced inflammation in adipose tissue and the improvement of lipid and bile acid metabolism markers. P. distasonis supplementation also modified the Actinomycetota, Bacillota and Bacteroidota taxa of the mice gut microbiota. These results provide better insight into the capacity of P. distasonis to positively influence host metabolism and to be used as novel source of live biotherapeutics in the treatment and prevention of metabolic-related diseases.
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Affiliation(s)
- Bernardo Cuffaro
- University Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d'Infection et d'Immunité de Lille, 59000 Lille, France
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, MIHA Team, 78350 Jouy-en-Josas, France
| | - Denise Boutillier
- University Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d'Infection et d'Immunité de Lille, 59000 Lille, France
| | - Jérémy Desramaut
- University Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d'Infection et d'Immunité de Lille, 59000 Lille, France
| | - Amin Jablaoui
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, MIHA Team, 78350 Jouy-en-Josas, France
| | - Elisabeth Werkmeister
- University Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d'Infection et d'Immunité de Lille, 59000 Lille, France
- UMR2014-US41-PLBS-Plateformes Lilloises de Biologie and Santé, 59000 Lille, France
| | - François Trottein
- University Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d'Infection et d'Immunité de Lille, 59000 Lille, France
| | | | - Moez Rhimi
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, MIHA Team, 78350 Jouy-en-Josas, France
| | - Emmanuelle Maguin
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, MIHA Team, 78350 Jouy-en-Josas, France
| | - Corinne Grangette
- University Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d'Infection et d'Immunité de Lille, 59000 Lille, France
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Dewitte A, Werkmeister E, Pierre F, Sebbane F, Bontemps-Gallo S. A Widefield Light Microscopy-Based Approach Provides Further Insights into the Colonization of the Flea Proventriculus by Yersinia pestis. Appl Environ Microbiol 2023; 89:e0209122. [PMID: 36939324 PMCID: PMC10132112 DOI: 10.1128/aem.02091-22] [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: 12/12/2022] [Accepted: 02/21/2023] [Indexed: 03/21/2023] Open
Abstract
Yersinia pestis (the agent of flea-borne plague) must obstruct the flea's proventriculus to maintain transmission to a mammalian host. To this end, Y. pestis must consolidate a mass that entrapped Y. pestis within the proventriculus very early after its ingestion. We developed a semiautomated fluorescent image analysis method and used it to monitor and compare colonization of the flea proventriculus by a fully competent flea-blocking Y. pestis strain, a partially competent strain, and a noncompetent strain. Our data suggested that flea blockage results primarily from the replication of Y. pestis trapped in the anterior half of the proventriculus. However, consolidation of the bacteria-entrapping mass and colonization of the entire proventricular lumen increased the likelihood of flea blockage. The data also showed that consolidation of the bacterial mass is not a prerequisite for colonization of the proventriculus but allowed Y. pestis to maintain itself in a large flea population for an extended period of time. Taken as the whole, the data suggest that a strategy targeting bacterial mass consolidation could significantly reduce the likelihood of Y. pestis being transmitted by fleas (due to gut blockage), but also the possibility of using fleas as a long-term reservoir. IMPORTANCE Yersinia pestis (the causative agent of plague) is one of the deadliest bacterial pathogens. It circulates primarily among rodent populations and their fleas. Better knowledge of the mechanisms leading to the flea-borne transmission of Y. pestis is likely to generate strategies for controlling or even eradicating this bacillus. It is known that Y. pestis obstructs the flea's foregut so that the insect starves, frantically bites its mammalian host, and regurgitates Y. pestis at the bite site. Here, we developed a semiautomated fluorescent image analysis method and used it to document and compare foregut colonization and disease progression in fleas infected with a fully competent flea-blocking Y. pestis strain, a partially competent strain, and a noncompetent strain. Overall, our data provided new insights into Y. pestis' obstruction of the proventriculus for transmission but also the ecology of plague.
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Affiliation(s)
- Amélie Dewitte
- University Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019-UMR9017-CIIL-Centre d’Infection et d'Immunité de Lille, Lille, France
| | - Elisabeth Werkmeister
- University Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019-UMR9017-CIIL-Centre d’Infection et d'Immunité de Lille, Lille, France
- University Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, US41-UMS2014 - PLBS, Lille, France
| | - François Pierre
- University Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019-UMR9017-CIIL-Centre d’Infection et d'Immunité de Lille, Lille, France
| | - Florent Sebbane
- University Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019-UMR9017-CIIL-Centre d’Infection et d'Immunité de Lille, Lille, France
| | - Sébastien Bontemps-Gallo
- University Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019-UMR9017-CIIL-Centre d’Infection et d'Immunité de Lille, Lille, France
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7
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Belhaouane I, Pochet A, Chatagnon J, Hoffmann E, Queval CJ, Deboosère N, Boidin-Wichlacz C, Majlessi L, Sencio V, Heumel S, Vandeputte A, Werkmeister E, Fievez L, Bureau F, Rouillé Y, Trottein F, Chamaillard M, Brodin P, Machelart A. Tirap controls Mycobacterium tuberculosis phagosomal acidification. PLoS Pathog 2023; 19:e1011192. [PMID: 36888688 PMCID: PMC9994722 DOI: 10.1371/journal.ppat.1011192] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 01/30/2023] [Indexed: 03/09/2023] Open
Abstract
Progression of tuberculosis is tightly linked to a disordered immune balance, resulting in inability of the host to restrict intracellular bacterial replication and its subsequent dissemination. The immune response is mainly characterized by an orchestrated recruitment of inflammatory cells secreting cytokines. This response results from the activation of innate immunity receptors that trigger downstream intracellular signaling pathways involving adaptor proteins such as the TIR-containing adaptor protein (Tirap). In humans, resistance to tuberculosis is associated with a loss-of-function in Tirap. Here, we explore how genetic deficiency in Tirap impacts resistance to Mycobacterium tuberculosis (Mtb) infection in a mouse model and ex vivo. Interestingly, compared to wild type littermates, Tirap heterozygous mice were more resistant to Mtb infection. Upon investigation at the cellular level, we observed that mycobacteria were not able to replicate in Tirap-deficient macrophages compared to wild type counterparts. We next showed that Mtb infection induced Tirap expression which prevented phagosomal acidification and rupture. We further demonstrate that the Tirap-mediated anti-tuberculosis effect occurs through a Cish-dependent signaling pathway. Our findings provide new molecular evidence about how Mtb manipulates innate immune signaling to enable intracellular replication and survival of the pathogen, thus paving the way for host-directed approaches to treat tuberculosis.
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Affiliation(s)
- Imène Belhaouane
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Amine Pochet
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Jonathan Chatagnon
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Eik Hoffmann
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Christophe J. Queval
- High Throughput Screening Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Nathalie Deboosère
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Céline Boidin-Wichlacz
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Laleh Majlessi
- Pasteur-TheraVectys Joint Lab, Institut Pasteur, Université Paris Cité, Paris, France
| | - Valentin Sencio
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Séverine Heumel
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Alexandre Vandeputte
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Elisabeth Werkmeister
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US 41—UMS 2014—PLBS, Lille, France
| | - Laurence Fievez
- Laboratory of Cellular and Molecular Immunology, GIGA-Research, Liège, Belgium
| | - Fabrice Bureau
- Laboratory of Cellular and Molecular Immunology, GIGA-Research, Liège, Belgium
| | - Yves Rouillé
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - François Trottein
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Mathias Chamaillard
- Laboratory of Cell Physiology, INSERM U1003, University of Lille, Lille, France
| | - Priscille Brodin
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
- * E-mail: (PB); (AM)
| | - Arnaud Machelart
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
- * E-mail: (PB); (AM)
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8
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Bentaleb C, Hervouet K, Montpellier C, Camuzet C, Ferrié M, Burlaud-Gaillard J, Bressanelli S, Metzger K, Werkmeister E, Ankavay M, Janampa NL, Marlet J, Roux J, Deffaud C, Goffard A, Rouillé Y, Dubuisson J, Roingeard P, Aliouat-Denis CM, Cocquerel L. The endocytic recycling compartment serves as a viral factory for hepatitis E virus. Cell Mol Life Sci 2022; 79:615. [PMID: 36460928 PMCID: PMC9718719 DOI: 10.1007/s00018-022-04646-y] [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: 08/26/2022] [Revised: 11/04/2022] [Accepted: 11/23/2022] [Indexed: 12/04/2022]
Abstract
Although hepatitis E virus (HEV) is the major leading cause of enterically transmitted viral hepatitis worldwide, many gaps remain in the understanding of the HEV lifecycle. Notably, viral factories induced by HEV have not been documented yet, and it is currently unknown whether HEV infection leads to cellular membrane modeling as many positive-strand RNA viruses. HEV genome encodes the ORF1 replicase, the ORF2 capsid protein and the ORF3 protein involved in virion egress. Previously, we demonstrated that HEV produces different ORF2 isoforms including the virion-associated ORF2i form. Here, we generated monoclonal antibodies that specifically recognize the ORF2i form and antibodies that recognize the different ORF2 isoforms. One antibody, named P1H1 and targeting the ORF2i N-terminus, recognized delipidated HEV particles from cell culture and patient sera. Importantly, AlphaFold2 modeling demonstrated that the P1H1 epitope is exposed on HEV particles. Next, antibodies were used to probe viral factories in HEV-producing/infected cells. By confocal microscopy, we identified subcellular nugget-like structures enriched in ORF1, ORF2 and ORF3 proteins and viral RNA. Electron microscopy analyses revealed an unprecedented HEV-induced membrane network containing tubular and vesicular structures. We showed that these structures are dependent on ORF2i capsid protein assembly and ORF3 expression. An extensive colocalization study of viral proteins with subcellular markers, and silencing experiments demonstrated that these structures are derived from the endocytic recycling compartment (ERC) for which Rab11 is a central player. Hence, HEV hijacks the ERC and forms a membrane network of vesicular and tubular structures that might be the hallmark of HEV infection.
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Affiliation(s)
- Cyrine Bentaleb
- grid.503422.20000 0001 2242 6780University of Lille, CNRS, Inserm, CHU Lille, Pasteur Institute of Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, 59000 Lille, France
| | - Kévin Hervouet
- grid.503422.20000 0001 2242 6780University of Lille, CNRS, Inserm, CHU Lille, Pasteur Institute of Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, 59000 Lille, France
| | - Claire Montpellier
- grid.503422.20000 0001 2242 6780University of Lille, CNRS, Inserm, CHU Lille, Pasteur Institute of Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, 59000 Lille, France
| | - Charline Camuzet
- grid.503422.20000 0001 2242 6780University of Lille, CNRS, Inserm, CHU Lille, Pasteur Institute of Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, 59000 Lille, France
| | - Martin Ferrié
- grid.503422.20000 0001 2242 6780University of Lille, CNRS, Inserm, CHU Lille, Pasteur Institute of Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, 59000 Lille, France
| | - Julien Burlaud-Gaillard
- grid.411167.40000 0004 1765 1600Inserm U1259, Morphogénèse et Antigénicité du VIH et des Virus des Hépatites (MAVIVH), Université de Tours and CHRU de Tours, 37032 Tours, France ,Université de Tours et CHRU de Tours, Plateforme IBiSA de Microscopie Electronique, Tours, France
| | - Stéphane Bressanelli
- grid.457334.20000 0001 0667 2738Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-Sur-Yvette, France
| | - Karoline Metzger
- grid.503422.20000 0001 2242 6780University of Lille, CNRS, Inserm, CHU Lille, Pasteur Institute of Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, 59000 Lille, France
| | - Elisabeth Werkmeister
- grid.503422.20000 0001 2242 6780Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR2014-US41-PLBS-Plateformes Lilloises de Biologie and Santé, Lille, France
| | - Maliki Ankavay
- grid.503422.20000 0001 2242 6780University of Lille, CNRS, Inserm, CHU Lille, Pasteur Institute of Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, 59000 Lille, France ,Present Address: Division of Gastroenterology and Hepatology, Institute of Microbiology, Lausanne, Switzerland
| | - Nancy Leon Janampa
- grid.411167.40000 0004 1765 1600Inserm U1259, Morphogénèse et Antigénicité du VIH et des Virus des Hépatites (MAVIVH), Université de Tours and CHRU de Tours, 37032 Tours, France
| | - Julien Marlet
- grid.411167.40000 0004 1765 1600Inserm U1259, Morphogénèse et Antigénicité du VIH et des Virus des Hépatites (MAVIVH), Université de Tours and CHRU de Tours, 37032 Tours, France
| | | | | | - Anne Goffard
- grid.503422.20000 0001 2242 6780University of Lille, CNRS, Inserm, CHU Lille, Pasteur Institute of Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, 59000 Lille, France
| | - Yves Rouillé
- grid.503422.20000 0001 2242 6780University of Lille, CNRS, Inserm, CHU Lille, Pasteur Institute of Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, 59000 Lille, France
| | - Jean Dubuisson
- grid.503422.20000 0001 2242 6780University of Lille, CNRS, Inserm, CHU Lille, Pasteur Institute of Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, 59000 Lille, France
| | - Philippe Roingeard
- grid.411167.40000 0004 1765 1600Inserm U1259, Morphogénèse et Antigénicité du VIH et des Virus des Hépatites (MAVIVH), Université de Tours and CHRU de Tours, 37032 Tours, France ,Université de Tours et CHRU de Tours, Plateforme IBiSA de Microscopie Electronique, Tours, France
| | - Cécile-Marie Aliouat-Denis
- grid.503422.20000 0001 2242 6780University of Lille, CNRS, Inserm, CHU Lille, Pasteur Institute of Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, 59000 Lille, France
| | - Laurence Cocquerel
- grid.503422.20000 0001 2242 6780University of Lille, CNRS, Inserm, CHU Lille, Pasteur Institute of Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, 59000 Lille, France
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9
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Palma M, Leroy C, Salomé-Desnoulez S, Werkmeister E, Kong R, Mongy M, Le Hir H, Lejeune F. A role for AKT1 in nonsense-mediated mRNA decay. Nucleic Acids Res 2021; 49:11022-11037. [PMID: 34634811 PMCID: PMC8565340 DOI: 10.1093/nar/gkab882] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 09/15/2021] [Accepted: 09/17/2021] [Indexed: 12/16/2022] Open
Abstract
Nonsense-mediated mRNA decay (NMD) is a highly regulated quality control mechanism through which mRNAs harboring a premature termination codon are degraded. It is also a regulatory pathway for some genes. This mechanism is subject to various levels of regulation, including phosphorylation. To date only one kinase, SMG1, has been described to participate in NMD, by targeting the central NMD factor UPF1. Here, screening of a kinase inhibitor library revealed as putative NMD inhibitors several molecules targeting the protein kinase AKT1. We present evidence demonstrating that AKT1, a central player in the PI3K/AKT/mTOR signaling pathway, plays an essential role in NMD, being recruited by the UPF3X protein to phosphorylate UPF1. As AKT1 is often overactivated in cancer cells and as this should result in increased NMD efficiency, the possibility that this increase might affect cancer processes and be targeted in cancer therapy is discussed.
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Affiliation(s)
- Martine Palma
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity Plasticity and Resistance to Therapies, F-59000 Lille, France.,Unité tumorigenèse et résistance aux traitements, Institut Pasteur de Lille, F-59000 Lille, France
| | - Catherine Leroy
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity Plasticity and Resistance to Therapies, F-59000 Lille, France.,Unité tumorigenèse et résistance aux traitements, Institut Pasteur de Lille, F-59000 Lille, France
| | - Sophie Salomé-Desnoulez
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US 41 - UMS 2014 - PLBS, F-59000 Lille, France
| | - Elisabeth Werkmeister
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US 41 - UMS 2014 - PLBS, F-59000 Lille, France.,Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR9017 - CIIL - center for Infection and Immunity of Lille, F-59000 Lille, France
| | - Rebekah Kong
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity Plasticity and Resistance to Therapies, F-59000 Lille, France.,Unité tumorigenèse et résistance aux traitements, Institut Pasteur de Lille, F-59000 Lille, France
| | - Marc Mongy
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US 41 - UMS 2014 - PLBS, F-59000 Lille, France
| | - Hervé Le Hir
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, CNRS, INSERM, PSL Research University, 46 rue d'Ulm, 75005 Paris, France
| | - Fabrice Lejeune
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity Plasticity and Resistance to Therapies, F-59000 Lille, France.,Unité tumorigenèse et résistance aux traitements, Institut Pasteur de Lille, F-59000 Lille, France
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10
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Bouté M, Ait Yahia S, Nanou J, Alvarez‐Simon D, Audousset C, Vorng H, Balsamelli J, Ying F, Marquillies P, Werkmeister E, Nadai P, Chenivesse C, Tsicopoulos A. Direct activation of the aryl hydrocarbon receptor by dog allergen participates in airway neutrophilic inflammation. Allergy 2021; 76:2245-2249. [PMID: 33465835 DOI: 10.1111/all.14740] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/07/2021] [Accepted: 01/13/2021] [Indexed: 01/02/2023]
Affiliation(s)
- Mélodie Bouté
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
| | - Saliha Ait Yahia
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
| | - Julie Nanou
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
| | - Daniel Alvarez‐Simon
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
| | - Camille Audousset
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
| | - Han Vorng
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
| | - Joanne Balsamelli
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
| | - Fan Ying
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
| | - Philippe Marquillies
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
| | - Elisabeth Werkmeister
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
| | - Patricia Nadai
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
| | - Cécile Chenivesse
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
| | - Anne Tsicopoulos
- Univ. LilleCNRSInsermCHU LilleInstitut Pasteur de LilleU1019‐UMR9017‐CIIL‐Centre d'Infection et d'Immunité de Lille Lille France
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11
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Venugopal K, Chehade S, Werkmeister E, Barois N, Periz J, Lafont F, Tardieux I, Khalife J, Langsley G, Meissner M, Marion S. Rab11A regulates dense granule transport and secretion during Toxoplasma gondii invasion of host cells and parasite replication. PLoS Pathog 2020; 16:e1008106. [PMID: 32463830 PMCID: PMC7255593 DOI: 10.1371/journal.ppat.1008106] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [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: 09/17/2019] [Accepted: 02/10/2020] [Indexed: 12/31/2022] Open
Abstract
Toxoplasma gondii possesses an armada of secreted virulent factors that enable parasite invasion and survival into host cells. These factors are contained in specific secretory organelles, the rhoptries, micronemes and dense granules that release their content upon host cell recognition. Dense granules are secreted in a constitutive manner during parasite replication and play a crucial role in modulating host metabolic and immune responses. While the molecular mechanisms triggering rhoptry and microneme release upon host cell adhesion have been well studied, constitutive secretion remains a poorly explored aspect of T. gondii vesicular trafficking. Here, we investigated the role of the small GTPase Rab11A, a known regulator of exocytosis in eukaryotic cells. Our data revealed an essential role of Rab11A in promoting the cytoskeleton driven transport of dense granules and the release of their content into the vacuolar space. Rab11A also regulates transmembrane protein trafficking and localization during parasite replication, indicating a broader role of Rab11A in cargo exocytosis at the plasma membrane. Moreover, we found that Rab11A also regulates extracellular parasite motility and adhesion to host cells. In line with these findings, MIC2 secretion was altered in Rab11A-defective parasites, which also exhibited severe morphological defects. Strikingly, by live imaging we observed a polarized accumulation of Rab11A-positive vesicles and dense granules at the apical pole of extracellular motile and invading parasites suggesting that apically polarized Rab11A-dependent delivery of cargo regulates early secretory events during parasite entry into host cells. Toxoplasma gondii (T. gondii) is a highly prevalent parasite infecting a wide range of animals as well as humans. T. gondii secretes numerous virulent factors contained in specific organelles, termed the rhoptries, micronemes and dense granules. These factors are released upon host cell recognition and enable parasite invasion and subsequent development into an intracellular vacuole. In particular, dense granules contain critical effectors that modulate intrinsic defenses of infected host cells ensuring parasite survival and dissemination. The mechanisms regulating dense granule secretion have not been elucidated. In this study, we unraveled a novel role for the T. gondii GTPase Rab11A in promoting dense granule transport along the parasite cytoskeleton and their content release into the vacuolar space during parasite replication. We also found that T. gondii Rab11A regulates extracellular parasite motility and adhesion to host cells suggesting a broader role in distinct secretory pathways essential for parasite virulence.
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Affiliation(s)
- Kannan Venugopal
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Sylia Chehade
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Elisabeth Werkmeister
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Nicolas Barois
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Javier Periz
- Department of Veterinary Sciences, Experimental Parasitology, Ludwig-Maximilians-Universität, Munich, Germany
| | - Frank Lafont
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Isabelle Tardieux
- Institute for Advanced Biosciences (IAB), Membrane Dynamics of Parasite-Host Cell Interactions, CNRS UMR5309, INSERM U1209, Université Grenoble Alpes, Grenoble, France
| | - Jamal Khalife
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Gordon Langsley
- Laboratoire de Biologie Comparative des Apicomplexes, Faculté de Médicine, Université Paris Descartes—Sorbonne Paris Cité, France, INSERM U1016, CNRS UMR8104, Institut Cochin, Paris, France
| | - Markus Meissner
- Department of Veterinary Sciences, Experimental Parasitology, Ludwig-Maximilians-Universität, Munich, Germany
| | - Sabrina Marion
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
- * E-mail:
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12
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Janel S, Popoff M, Barois N, Werkmeister E, Divoux S, Perez F, Lafont F. Stiffness tomography of eukaryotic intracellular compartments by atomic force microscopy. Nanoscale 2019; 11:10320-10328. [PMID: 31106790 DOI: 10.1039/c8nr08955h] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Precise localization and biophysical characterization of cellular structures is a key to the understanding of biological processes happening both inside the cell and at the cell surface. Atomic force microscopy is a powerful tool to study the cell surface - topography, elasticity, viscosity, interactions - and also the viscoelastic behavior of the underlying cytoplasm, cytoskeleton or the nucleus. Here, we demonstrate the ability of atomic force microscopy to also map and characterize organelles and microorganisms inside cells, at the nanoscale, by combining stiffness tomography with super-resolution fluorescence and electron microscopy. By using this correlative approach, we could both identify and characterize intracellular compartments. The validation of this approach was performed by monitoring the stiffening effect according to the metabolic status of the mitochondria in living cells in real-time.
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Affiliation(s)
- Sébastien Janel
- Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM U1019, CHU Lille, Institut Pasteur de Lille, Univ Lille, F-59000 Lille, France.
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13
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Ciczora Y, Janel S, Soyer M, Popoff M, Werkmeister E, Lafont F. Blocking bacterial entry at the adhesion step reveals dynamic recruitment of membrane and cytosolic probes. Biol Cell 2019; 111:67-77. [PMID: 30680759 DOI: 10.1111/boc.201800070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 10/19/2018] [Revised: 12/05/2018] [Accepted: 12/06/2018] [Indexed: 11/28/2022]
Abstract
BACKGROUND Bacterial invasion covers two steps: adhesion and entry per se. The cell signalling response is triggered upon pathogen interaction at the cell surface. This response continues when the pathogen is internalised. It is likely that these two steps activate different molecular machineries. So far, it has not been possible to easily follow in physiological conditions these events separately. We thus developed an approach to uncouple adhesion from entry using atomic force microscopy (AFM)-driven force and fluorescence measurements. RESULTS We report nanometric-scale, high-resolution, functional dynamic measurements of bacterial interaction with the host cell surface using photonic and adhesion force analyses. We describe how to achieve a precise monitoring of iterative cell-bacterium interactions to analyse host cell signalling responses to infection. By applying this method to Yersinia pseudotuberculosis, we first unveil glycosylphosphatidylinositol-anchored protein domains recruitment to the bacterium cell surface binding site and concomitant cytoskeleton rearrangements using super-resolution fluorescence microscopy. Second, we demonstrate the feasibility of monitoring post-translationally modified proteins, for example, via ubiquitylation, during the first step of infection. CONCLUSION We provide an approach to discriminate between cellular signalling response activated at the plasma membrane during host-pathogen interaction and that is triggered during the internalisation of the pathogen within the cell. SIGNIFICANCE This approach adds to the technological arsenal to better understand and fight against pathogens and beyond the scope of microbiology to address conceptual issues of cell surface signalling.
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Affiliation(s)
- Yann Ciczora
- Cellular Microbiology and Physics of Infection Group, Center for Infection and Immunity of Lille, CNRS UMR8204, INSERM U1019, Institut Pasteur de Lille, Lille regional Univ. Hosp. Centr., Lille Univ., Lille, F-59019, France
| | - Sébastien Janel
- Cellular Microbiology and Physics of Infection Group, Center for Infection and Immunity of Lille, CNRS UMR8204, INSERM U1019, Institut Pasteur de Lille, Lille regional Univ. Hosp. Centr., Lille Univ., Lille, F-59019, France
| | - Magali Soyer
- Cellular Microbiology and Physics of Infection Group, Center for Infection and Immunity of Lille, CNRS UMR8204, INSERM U1019, Institut Pasteur de Lille, Lille regional Univ. Hosp. Centr., Lille Univ., Lille, F-59019, France
| | - Michka Popoff
- Cellular Microbiology and Physics of Infection Group, Center for Infection and Immunity of Lille, CNRS UMR8204, INSERM U1019, Institut Pasteur de Lille, Lille regional Univ. Hosp. Centr., Lille Univ., Lille, F-59019, France.,Institut d'Electronique, de Microélectronique et de Nanotechnologie, CNRS UMR8520, Avenue Poincaré, Villeneuve d'Ascq, F-59625, France
| | - Elisabeth Werkmeister
- Cellular Microbiology and Physics of Infection Group, Center for Infection and Immunity of Lille, CNRS UMR8204, INSERM U1019, Institut Pasteur de Lille, Lille regional Univ. Hosp. Centr., Lille Univ., Lille, F-59019, France
| | - Frank Lafont
- Cellular Microbiology and Physics of Infection Group, Center for Infection and Immunity of Lille, CNRS UMR8204, INSERM U1019, Institut Pasteur de Lille, Lille regional Univ. Hosp. Centr., Lille Univ., Lille, F-59019, France
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14
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Villain G, Lelievre E, Broekelmann T, Gayet O, Havet C, Werkmeister E, Mecham R, Dusetti N, Soncin F, Mattot V. MAGP
‐1 and fibronectin control
EGFL
7 functions by driving its deposition into distinct endothelial extracellular matrix locations. FEBS J 2018; 285:4394-4412. [DOI: 10.1111/febs.14680] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 08/31/2018] [Accepted: 10/16/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Gaëlle Villain
- CNRS Institut Pasteur de Lille UMR 8161 – M3T – Mechanisms of Tumorigenesis and Target Therapies Univ. Lille France
| | - Etienne Lelievre
- CNRS Institut Pasteur de Lille UMR 8161 – M3T – Mechanisms of Tumorigenesis and Target Therapies Univ. Lille France
| | - Tom Broekelmann
- Department of Cell Biology and Physiology Washington University School of Medicine St. Louis MO USA
| | - Odile Gayet
- Centre de Recherche en Cancérologie de Marseille (CRCM) INSERM U1068 CNRS UMR 7258 Aix‐Marseille Université and Institut Paoli‐Calmettes, Parc Scientifique et Technologique de Luminy France
| | - Chantal Havet
- CNRS Institut Pasteur de Lille UMR 8161 – M3T – Mechanisms of Tumorigenesis and Target Therapies Univ. Lille France
| | - Elisabeth Werkmeister
- Cellular Microbiology and Physics of Infection Group – Center for Infection and Immunity of Lille CNRS UMR8204 Inserm U1019 CHU Lille Institut Pasteur de Lille Univ. Lille. France
| | - Robert Mecham
- Department of Cell Biology and Physiology Washington University School of Medicine St. Louis MO USA
| | - Nelson Dusetti
- Centre de Recherche en Cancérologie de Marseille (CRCM) INSERM U1068 CNRS UMR 7258 Aix‐Marseille Université and Institut Paoli‐Calmettes, Parc Scientifique et Technologique de Luminy France
| | - Fabrice Soncin
- CNRS Institut Pasteur de Lille UMR 8161 – M3T – Mechanisms of Tumorigenesis and Target Therapies Univ. Lille France
| | - Virginie Mattot
- CNRS Institut Pasteur de Lille UMR 8161 – M3T – Mechanisms of Tumorigenesis and Target Therapies Univ. Lille France
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15
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Raze D, Verwaerde C, Deloison G, Werkmeister E, Coupin B, Loyens M, Brodin P, Rouanet C, Locht C. Heparin-Binding Hemagglutinin Adhesin (HBHA) Is Involved in Intracytosolic Lipid Inclusions Formation in Mycobacteria. Front Microbiol 2018; 9:2258. [PMID: 30333800 PMCID: PMC6176652 DOI: 10.3389/fmicb.2018.02258] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 09/05/2018] [Indexed: 12/19/2022] Open
Abstract
The heparin-binding hemagglutinin adhesin (HBHA) is an important virulence factor of Mycobacterium tuberculosis. It is a surface-displayed protein that serves as an adhesin for non-phagocytic cells and is involved in extra-pulmonary dissemination of the tubercle bacillus. It is also an important latency antigen useful for the diagnosis of latently M. tuberculosis-infected individuals. Using fluorescence time-lapse microscopy on mycobacteria that produce HBHA-green fluorescent protein chimera, we show here that HBHA can be found at two different locations and dynamically alternates between the mycobacterial surface and the interior of the cell, where it participates in the formation of intracytosolic lipid inclusions (ILI). Compared to HBHA-producing mycobacteria, HBHA-deficient mutants contain significantly lower amounts of ILI when grown in vitro or within macrophages, and the sizes of their ILI are significantly smaller. Lipid-binding assays indicate that HBHA is able to specifically bind to phosphatidylinositol and in particular to 4,5 di-phosphorylated phosphatidylinositol, but not to neutral lipids, the main constituents of ILI. HBHA derivatives lacking the C-terminal methylated, lysine-rich repeat region fail to bind to these lipids and these derivatives also fail to complement the phenotype of HBHA-deficient mutants. These studies indicate that HBHA is a moonlighting protein that serves several functions depending on its location. When surface exposed, HBHA serves as an adhesin, and when intracellularly localized, it participates in the generation of ILI, possibly as a cargo to transport phospholipids from the plasma membrane to the ILI in the process of being formed.
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Affiliation(s)
- Dominique Raze
- CNRS UMR8204, INSERM U1019, Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Université de Lille, Lille, France
| | - Claudie Verwaerde
- CNRS UMR8204, INSERM U1019, Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Université de Lille, Lille, France
| | - Gaspard Deloison
- CNRS UMR8204, INSERM U1019, Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Université de Lille, Lille, France
| | - Elisabeth Werkmeister
- CNRS UMR8204, INSERM U1019, Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Université de Lille, Lille, France
| | - Baptiste Coupin
- CNRS UMR8204, INSERM U1019, Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Université de Lille, Lille, France
| | - Marc Loyens
- CNRS UMR8204, INSERM U1019, Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Université de Lille, Lille, France
| | - Priscille Brodin
- CNRS UMR8204, INSERM U1019, Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Université de Lille, Lille, France
| | - Carine Rouanet
- CNRS UMR8204, INSERM U1019, Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Université de Lille, Lille, France
| | - Camille Locht
- CNRS UMR8204, INSERM U1019, Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Université de Lille, Lille, France
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16
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Baldacci S, Kherrouche Z, Cockenpot V, Stoven L, Copin MC, Werkmeister E, Marchand N, Kyheng M, Tulasne D, Cortot AB. MET amplification increases the metastatic spread of EGFR-mutated NSCLC. Lung Cancer 2018; 125:57-67. [PMID: 30429039 DOI: 10.1016/j.lungcan.2018.09.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [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: 07/19/2018] [Revised: 09/05/2018] [Accepted: 09/10/2018] [Indexed: 12/15/2022]
Abstract
BACKGROUND Five to 20% of metastatic EGFR-mutated non-small cell lung cancers (NSCLC) develop acquired resistance to EGFR tyrosine kinase inhibitors (EGFR-TKI) through MET amplification. The effects of MET amplification on tumor and patient phenotype remain unknown. METHODS We investigated,in vitro and in vivo, the impact of MET amplification on the biological properties of the HCC827 cell line, derived from an EGFR-mutated NSCLC. We further evaluated the time to new metastases after EGFR-TKI progression in EGFR-mutated NSCLC, exhibiting MET amplification or high MET overexpression. RESULTS MET amplification significantly enhanced proliferation, anchorage independent growth, anoikis resistance, migration, and induced an epithelial to mesenchymal transition. In vivo, MET amplification significantly increased the tumor growth and metastatic spread. Treatment with a MET-TKI reversed this aggressive phenotype. We found that EGFR-mutated NSCLC patients exhibiting MET amplification on a re-biopsy, performed after EGFR-TKI progression, displayed a shorter time to new metastases after EGFR-TKI progression than patients with high MET overexpression but no MET amplification. CONCLUSION MET amplification increases metastatic spread even in the context of an already pre-existing strong driver mutation such as EGFR mutation. These results prompt development of therapeutic strategies aiming at preventing emergence of MET amplification.
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Affiliation(s)
- Simon Baldacci
- Thoracic Oncology Department, CHU Lille, Siric OncoLille, F-59000, Lille, France; Univ Lille, Lille, France; Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000, Lille, France.
| | - Zoulika Kherrouche
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000, Lille, France; Institut Pasteur de Lille, France.
| | - Vincent Cockenpot
- Univ Lille, Lille, France; Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000, Lille, France; Pathology department CHRU Lille, France.
| | - Luc Stoven
- Thoracic Oncology Department, CHU Lille, Siric OncoLille, F-59000, Lille, France; Univ Lille, Lille, France; Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000, Lille, France.
| | - Marie Christine Copin
- Univ Lille, Lille, France; Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000, Lille, France; Pathology department CHRU Lille, France.
| | | | - Nathalie Marchand
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000, Lille, France.
| | | | - David Tulasne
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000, Lille, France.
| | - Alexis B Cortot
- Thoracic Oncology Department, CHU Lille, Siric OncoLille, F-59000, Lille, France; Univ Lille, Lille, France; Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000, Lille, France.
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17
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Song OR, Queval CJ, Iantomasi R, Delorme V, Marion S, Veyron-Churlet R, Werkmeister E, Popoff M, Ricard I, Jouny S, Deboosere N, Lafont F, Baulard A, Yeramian E, Marsollier L, Hoffmann E, Brodin P. ArfGAP1 restricts Mycobacterium tuberculosis entry by controlling the actin cytoskeleton. EMBO Rep 2017; 19:29-42. [PMID: 29141986 DOI: 10.15252/embr.201744371] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 04/26/2017] [Revised: 10/03/2017] [Accepted: 10/23/2017] [Indexed: 11/09/2022] Open
Abstract
The interaction of Mycobacterium tuberculosis (Mtb) with pulmonary epithelial cells is critical for early stages of bacillus colonization and during the progression of tuberculosis. Entry of Mtb into epithelial cells has been shown to depend on F-actin polymerization, though the molecular mechanisms are still unclear. Here, we demonstrate that mycobacterial uptake into epithelial cells requires rearrangements of the actin cytoskeleton, which are regulated by ADP-ribosylation factor 1 (Arf1) and phospholipase D1 (PLD1), and is dependent on the M3 muscarinic receptor (M3R). We show that this pathway is controlled by Arf GTPase-activating protein 1 (ArfGAP1), as its silencing has an impact on actin cytoskeleton reorganization leading to uncontrolled uptake and replication of Mtb. Furthermore, we provide evidence that this pathway is critical for mycobacterial entry, while the cellular infection with other pathogens, such as Shigella flexneri and Yersinia pseudotuberculosis, is not affected. Altogether, these results reveal how cortical actin plays the role of a barrier to prevent mycobacterial entry into epithelial cells and indicate a novel role for ArfGAP1 as a restriction factor of host-pathogen interactions.
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Affiliation(s)
- Ok-Ryul Song
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France.,Equipe ATIP AVENIR, CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France.,CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France.,Institute Pasteur Korea, Seongnam-si Gyeonggi-do, South Korea
| | - Christophe J Queval
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France
| | - Raffaella Iantomasi
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France
| | - Vincent Delorme
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France.,Institute Pasteur Korea, Seongnam-si Gyeonggi-do, South Korea
| | - Sabrina Marion
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France
| | - Romain Veyron-Churlet
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France
| | - Elisabeth Werkmeister
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France
| | - Michka Popoff
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France.,CNRS, UMR8520, Institut d'électronique, de microélectronique et de nanotechnologie, Villeneuve d'Ascq, France
| | - Isabelle Ricard
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France
| | - Samuel Jouny
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France
| | - Nathalie Deboosere
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France
| | - Frank Lafont
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France
| | - Alain Baulard
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France
| | - Edouard Yeramian
- Unité de Microbiologie Structurale, CNRS UMR3528, Institut Pasteur, Paris, France
| | - Laurent Marsollier
- Equipe ATIP AVENIR, CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France .,CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France
| | - Eik Hoffmann
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France
| | - Priscille Brodin
- CNRS, Inserm, CHU Lille, U1019 - UMR8204 - CIIL - Centre d'Infection et d'Immunité de Lille, Institut Pasteur de Lille, Univ. Lille, Lille, France .,Institute Pasteur Korea, Seongnam-si Gyeonggi-do, South Korea
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18
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Jia J, Werkmeister E, Gonzalez-Hilarion S, Leroy C, Gruenert DC, Lafont F, Tulasne D, Lejeune F. Premature termination codon readthrough in human cells occurs in novel cytoplasmic foci and requires UPF proteins. J Cell Sci 2017; 130:3009-3022. [PMID: 28743738 DOI: 10.1242/jcs.198176] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 10/12/2016] [Accepted: 07/13/2017] [Indexed: 01/01/2023] Open
Abstract
Nonsense-mutation-containing messenger ribonucleoprotein particles (mRNPs) transit through cytoplasmic foci called P-bodies before undergoing nonsense-mediated mRNA decay (NMD), a cytoplasmic mRNA surveillance mechanism. This study shows that the cytoskeleton modulates transport of nonsense-mutation-containing mRNPs to and from P-bodies. Impairing the integrity of cytoskeleton causes inhibition of NMD. The cytoskeleton thus plays a crucial role in NMD. Interestingly, disruption of actin filaments results in both inhibition of NMD and activation of premature termination codon (PTC) readthrough, while disruption of microtubules causes only NMD inhibition. Activation of PTC readthrough occurs concomitantly with the appearance of cytoplasmic foci containing UPF proteins and mRNAs with nonsense mutations but lacking the P-body marker DCP1a. These findings demonstrate that in human cells, PTC readthrough occurs in novel 'readthrough bodies' and requires the presence of UPF proteins.
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Affiliation(s)
- Jieshuang Jia
- Univ. Lille, UMR8161 - M3T - Mechanisms of Tumorigenesis and Target Therapies, 59000 Lille, France.,CNRS, UMR 8161, 59000 Lille, France.,Institut Pasteur de Lille, 59000 Lille, France
| | - Elisabeth Werkmeister
- Institut Pasteur de Lille, 59000 Lille, France.,Cellular Microbiology and Physics of Infection group - Center for Infection and Immunity of Lille, Univ. Lille, 59019 Lille, France.,CNRS, UMR8204, 59019 Lille, France.,Inserm, U1019, 59019 Lille, France.,CHU de Lille, 59000 Lille, France
| | | | - Catherine Leroy
- Univ. Lille, UMR8161 - M3T - Mechanisms of Tumorigenesis and Target Therapies, 59000 Lille, France.,CNRS, UMR 8161, 59000 Lille, France.,Institut Pasteur de Lille, 59000 Lille, France
| | - Dieter C Gruenert
- Department of Otolaryngology-Head and Neck Surgery, Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Helen Diller Family Comprehensive Cancer Center, Institute for Human Genetics, Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA 94143, USA.,Department of Pediatrics, University of Vermont College of Medicine, Burlington, VT 05405, USA
| | - Frank Lafont
- CNRS, UMR8204, 59019 Lille, France.,Inserm, U1019, 59019 Lille, France.,CHU de Lille, 59000 Lille, France.,Institut Pasteur de Lille, 59000 Lille, France
| | - David Tulasne
- Univ. Lille, UMR8161 - M3T - Mechanisms of Tumorigenesis and Target Therapies, 59000 Lille, France.,CNRS, UMR 8161, 59000 Lille, France.,Institut Pasteur de Lille, 59000 Lille, France
| | - Fabrice Lejeune
- Univ. Lille, UMR8161 - M3T - Mechanisms of Tumorigenesis and Target Therapies, 59000 Lille, France .,CNRS, UMR 8161, 59000 Lille, France.,Institut Pasteur de Lille, 59000 Lille, France
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19
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Song OR, Deboosere N, Delorme V, Queval CJ, Deloison G, Werkmeister E, Lafont F, Baulard A, Iantomasi R, Brodin P. Phenotypic assays for Mycobacterium tuberculosis infection. Cytometry A 2017; 91:983-994. [PMID: 28544095 DOI: 10.1002/cyto.a.23129] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 12/18/2016] [Revised: 03/23/2017] [Accepted: 04/13/2017] [Indexed: 12/13/2022]
Abstract
Tuberculosis (TB) is still a major global threat, killing more than one million persons each year. With the constant increase of Mycobacterium tuberculosis strains resistant to first- and second-line drugs, there is an urgent need for the development of new drugs to control the propagation of TB. Although screenings of small molecules on axenic M. tuberculosis cultures were successful for the identification of novel putative anti-TB drugs, new drugs in the development pipeline remains scarce. Host-directed therapy may represent an alternative for drug development against TB. Indeed, M. tuberculosis has multiple specific interactions within host phagocytes, which may be targeted by small molecules. In order to enable drug discovery strategies against microbes residing within host macrophages, we developed multiple fluorescence-based HT/CS phenotypic assays monitoring the intracellular replication of M. tuberculosis as well as its intracellular trafficking. What we propose here is a population-based, multi-parametric analysis pipeline that can be used to monitor the intracellular fate of M. tuberculosis and the dynamics of cellular events such as phagosomal maturation (acidification and permeabilization), zinc poisoning system or lipid body accumulation. Such analysis allows the quantification of biological events considering the host-pathogen interplay and may thus be derived to other intracellular pathogens. © 2017 International Society for Advancement of Cytometry.
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Affiliation(s)
- Ok-Ryul Song
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, France
| | - Nathalie Deboosere
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, France
| | - Vincent Delorme
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, France.,Tuberculosis Research Laboratory, Institut Pasteur Korea, Bundang-gu, Seongnam-si, Gyeonggi-do, 13488, Korea
| | - Christophe J Queval
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, France
| | - Gaspard Deloison
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, France
| | - Elisabeth Werkmeister
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, France
| | - Frank Lafont
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, France
| | - Alain Baulard
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, France
| | - Raffaella Iantomasi
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, France
| | - Priscille Brodin
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, France
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20
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Abstract
Atomic force microscopy (AFM) is becoming increasingly used in the biology field. It can give highly accurate topography and biomechanical quantitative data, such as adhesion, elasticity, and viscosity, on living samples. Nowadays, correlative light electron microscopy is a must-have tool in the biology field that combines different microscopy techniques to spatially and temporally analyze the structure and function of a single sample. Here, we describe the combination of AFM with superresolution light microscopy and electron microscopy. We named this technique correlative light atomic force electron microscopy (CLAFEM) in which AFM can be used on fixed and living cells in association with superresolution light microscopy and further processed for transmission or scanning electron microscopy. We herein illustrate this approach to observe cellular bacterial infection and cytoskeleton. We show that CLAFEM brings complementary information at the cellular level, from on the one hand protein distribution and topography at the nanometer scale and on the other hand elasticity at the piconewton scales to fine ultrastructural details.
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Affiliation(s)
- Sébastien Janel
- Univ. Lille, CNRS UMR 8204, Inserm U1019, CHU Lille, Institut Pasteur de Lille - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | - Elisabeth Werkmeister
- Univ. Lille, CNRS UMR 8204, Inserm U1019, CHU Lille, Institut Pasteur de Lille - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | - Antonino Bongiovanni
- Univ. Lille, CNRS UMR 8204, Inserm U1019, CHU Lille, Institut Pasteur de Lille - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | - Frank Lafont
- Univ. Lille, CNRS UMR 8204, Inserm U1019, CHU Lille, Institut Pasteur de Lille - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | - Nicolas Barois
- Univ. Lille, CNRS UMR 8204, Inserm U1019, CHU Lille, Institut Pasteur de Lille - CIIL - Center for Infection and Immunity of Lille, Lille, France
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21
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Venugopal K, Werkmeister E, Barois N, Saliou JM, Poncet A, Huot L, Sindikubwabo F, Hakimi MA, Langsley G, Lafont F, Marion S. Dual role of the Toxoplasma gondii clathrin adaptor AP1 in the sorting of rhoptry and microneme proteins and in parasite division. PLoS Pathog 2017; 13:e1006331. [PMID: 28430827 PMCID: PMC5415223 DOI: 10.1371/journal.ppat.1006331] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 05/03/2017] [Accepted: 04/03/2017] [Indexed: 12/13/2022] Open
Abstract
Toxoplasma gondii possesses a highly polarized secretory system, which efficiently assembles de novo micronemes and rhoptries during parasite replication. These apical secretory organelles release their contents into host cells promoting parasite invasion and survival. Using a CreLox-based inducible knock-out strategy and the ddFKBP over-expression system, we unraveled novel functions of the clathrin adaptor complex TgAP1. First, our data indicate that AP1 in T. gondii likely functions as a conserved heterotetrameric complex composed of the four subunits γ, β, μ1, σ1 and interacts with known regulators of clathrin-mediated vesicular budding such as the unique ENTH-domain containing protein, which we named Epsin-like protein (TgEpsL). Disruption of the μ1 subunit resulted in the mis-sorting of microneme proteins at the level of the Trans-Golgi-Network (TGN). Furthermore, we demonstrated that TgAP1 regulates rhoptry biogenesis by activating rhoptry protein exit from the TGN, but also participates in the post-Golgi maturation process of preROP compartments into apically anchored club-shaped mature organelles. For this latter activity, our data indicate a specific functional relationship between TgAP1 and the Rab5A-positive endosome-like compartment. In addition, we unraveled an original role for TgAP1 in the regulation of parasite division. APμ1-depleted parasites undergo normal daughter cell budding and basal complex assembly but fail to segregate at the end of cytokinesis. The phylum Apicomplexa comprises a large group of obligate intracellular parasites of wide human and agricultural significance. Most notable are Plasmodium, the causative agent of malaria, and Toxoplasma gondii, one of the most common human parasites, responsible for disease of the developing fetus and immune-compromised individuals. Apicomplexa are characterized by the presence of an apical complex consisting of secretory organelles named micronemes (MIC) and rhoptries (ROP). MIC and ROP proteins, released upon host cell recognition, are essential for host cell invasion and parasite survival. After invasion, these organelles are neo-synthesized at each parasite replication cycle. In our study, we demonstrate a crucial role for the T. gondii clathrin adaptor complex AP1 in the vesicular transport of neo-synthesized MIC and ROP proteins, thereby regulating mature apical organelle formation. In addition, we unravel an original role for TgAP1 in the late stages of the parasite division process during daughter cell segregation. Therefore, our study provides new insights into key regulatory mechanisms of the vesicular trafficking system essential for host invasion and intracellular survival of Toxoplasma gondii.
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Affiliation(s)
- Kannan Venugopal
- Centre d'Infection et d'Immunité de Lille, Université de Lille, Inserm U1019, CNRS UMR 8204, CHU Lille, Institut Pasteur de Lille, Lille, France
| | - Elisabeth Werkmeister
- Centre d'Infection et d'Immunité de Lille, Université de Lille, Inserm U1019, CNRS UMR 8204, CHU Lille, Institut Pasteur de Lille, Lille, France
| | - Nicolas Barois
- Centre d'Infection et d'Immunité de Lille, Université de Lille, Inserm U1019, CNRS UMR 8204, CHU Lille, Institut Pasteur de Lille, Lille, France
| | - Jean-Michel Saliou
- Centre d'Infection et d'Immunité de Lille, Université de Lille, Inserm U1019, CNRS UMR 8204, CHU Lille, Institut Pasteur de Lille, Lille, France
| | - Anais Poncet
- Centre d'Infection et d'Immunité de Lille, Université de Lille, Inserm U1019, CNRS UMR 8204, CHU Lille, Institut Pasteur de Lille, Lille, France
| | - Ludovic Huot
- Centre d'Infection et d'Immunité de Lille, Université de Lille, Inserm U1019, CNRS UMR 8204, CHU Lille, Institut Pasteur de Lille, Lille, France
| | - Fabien Sindikubwabo
- IAB, Team Host-pathogen interactions & immunity to infection, Université Grenoble Alpes, Inserm U1209, CNRS UMR5309, Grenoble, France
| | - Mohamed Ali Hakimi
- IAB, Team Host-pathogen interactions & immunity to infection, Université Grenoble Alpes, Inserm U1209, CNRS UMR5309, Grenoble, France
| | - Gordon Langsley
- Laboratoire de Biologie Cellulaire Comparative des Apicomplexes, Faculté de Médicine, Université Paris Descartes-Sorbonne Paris Cité, France. Inserm U1016, CNRS UMR8104, Institut Cochin, Paris, France
| | - Frank Lafont
- Centre d'Infection et d'Immunité de Lille, Université de Lille, Inserm U1019, CNRS UMR 8204, CHU Lille, Institut Pasteur de Lille, Lille, France
| | - Sabrina Marion
- Centre d'Infection et d'Immunité de Lille, Université de Lille, Inserm U1019, CNRS UMR 8204, CHU Lille, Institut Pasteur de Lille, Lille, France
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Letronne F, Laumet G, Ayral AM, Chapuis J, Demiautte F, Laga M, Vandenberghe ME, Malmanche N, Leroux F, Eysert F, Sottejeau Y, Chami L, Flaig A, Bauer C, Dourlen P, Lesaffre M, Delay C, Huot L, Dumont J, Werkmeister E, Lafont F, Mendes T, Hansmannel F, Dermaut B, Deprez B, Hérard AS, Dhenain M, Souedet N, Pasquier F, Tulasne D, Berr C, Hauw JJ, Lemoine Y, Amouyel P, Mann D, Déprez R, Checler F, Hot D, Delzescaux T, Gevaert K, Lambert JC. ADAM30 Downregulates APP-Linked Defects Through Cathepsin D Activation in Alzheimer's Disease. EBioMedicine 2016; 9:278-292. [PMID: 27333034 PMCID: PMC4972530 DOI: 10.1016/j.ebiom.2016.06.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [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: 04/25/2016] [Revised: 05/31/2016] [Accepted: 06/01/2016] [Indexed: 01/12/2023] Open
Abstract
Although several ADAMs (A disintegrin-like and metalloproteases) have been shown to contribute to the amyloid precursor protein (APP) metabolism, the full spectrum of metalloproteases involved in this metabolism remains to be established. Transcriptomic analyses centred on metalloprotease genes unraveled a 50% decrease in ADAM30 expression that inversely correlates with amyloid load in Alzheimer's disease brains. Accordingly, in vitro down- or up-regulation of ADAM30 expression triggered an increase/decrease in Aβ peptides levels whereas expression of a biologically inactive ADAM30 (ADAM30(mut)) did not affect Aβ secretion. Proteomics/cell-based experiments showed that ADAM30-dependent regulation of APP metabolism required both cathepsin D (CTSD) activation and APP sorting to lysosomes. Accordingly, in Alzheimer-like transgenic mice, neuronal ADAM30 over-expression lowered Aβ42 secretion in neuron primary cultures, soluble Aβ42 and amyloid plaque load levels in the brain and concomitantly enhanced CTSD activity and finally rescued long term potentiation alterations. Our data thus indicate that lowering ADAM30 expression may favor Aβ production, thereby contributing to Alzheimer's disease development.
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Affiliation(s)
- Florent Letronne
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Geoffroy Laumet
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Anne-Marie Ayral
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Julien Chapuis
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Florie Demiautte
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Mathias Laga
- Department of Medical Protein Research, VIB, Ghent, Belgium; Department of Biochemistry, Ghent University, Ghent, Belgium
| | - Michel E Vandenberghe
- CEA, DSV, I2BM, MIRCen, Fontenay aux Roses, France; CNRS, UMR 9199, Fontenay aux Roses, France
| | - Nicolas Malmanche
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Florence Leroux
- Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France; INSERM U1177, Drugs and Molecules for Living Systems, F5900 Lille, France
| | - Fanny Eysert
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Yoann Sottejeau
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Linda Chami
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275 CNRS, Laboratoire d'Excellence Distalz, Nice, France; Université de Nice-Sophia-Antipolis, Valbonne, France
| | - Amandine Flaig
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Charlotte Bauer
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275 CNRS, Laboratoire d'Excellence Distalz, Nice, France; Université de Nice-Sophia-Antipolis, Valbonne, France
| | - Pierre Dourlen
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Marie Lesaffre
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France
| | - Charlotte Delay
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Ludovic Huot
- Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France; Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM 1019, Lille, France
| | - Julie Dumont
- Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France; INSERM U1177, Drugs and Molecules for Living Systems, F5900 Lille, France
| | | | | | - Tiago Mendes
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Franck Hansmannel
- INSERM, U954, Vandoeuvre-lès-Nancy, France; Department of Hepato-Gastroenterology, University Hospital of Nancy, Université Henri Poincaré 1, Vandoeuvre-lès-Nancy, France
| | - Bart Dermaut
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France
| | - Benoit Deprez
- Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France; INSERM U1177, Drugs and Molecules for Living Systems, F5900 Lille, France
| | - Anne-Sophie Hérard
- CEA, DSV, I2BM, MIRCen, Fontenay aux Roses, France; CNRS, UMR 9199, Fontenay aux Roses, France
| | - Marc Dhenain
- CEA, DSV, I2BM, MIRCen, Fontenay aux Roses, France; CNRS, UMR 9199, Fontenay aux Roses, France
| | - Nicolas Souedet
- CEA, DSV, I2BM, MIRCen, Fontenay aux Roses, France; CNRS, UMR 9199, Fontenay aux Roses, France
| | - Florence Pasquier
- Univ. Lille, Inserm, U1171, - Degenerative & Vascular Cognitive Disorders, Laboratoire d'Excellence Distalz, F-59000 Lille, France; CHR&U, Lille, France
| | - David Tulasne
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France
| | - Claudine Berr
- INSERM, U1061, Université de Montpellier I, Hôpital La Colombière, Montpellier, France
| | - Jean-Jacques Hauw
- APHP-Raymond Escourolle Neuropathology Laboratory, la salpétrière Hospital, Paris, France
| | - Yves Lemoine
- Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France; Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM 1019, Lille, France
| | - Philippe Amouyel
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France; CHR&U, Lille, France
| | - David Mann
- Institute of Brain, Behaviour and Mental Health, University of Manchester, Salford Royal Hospital, Salford, UK
| | - Rebecca Déprez
- Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France; INSERM U1177, Drugs and Molecules for Living Systems, F5900 Lille, France
| | - Frédéric Checler
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275 CNRS, Laboratoire d'Excellence Distalz, Nice, France; Université de Nice-Sophia-Antipolis, Valbonne, France
| | - David Hot
- Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France; Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM 1019, Lille, France
| | - Thierry Delzescaux
- CEA, DSV, I2BM, MIRCen, Fontenay aux Roses, France; CNRS, UMR 9199, Fontenay aux Roses, France
| | - Kris Gevaert
- Department of Medical Protein Research, VIB, Ghent, Belgium; Department of Biochemistry, Ghent University, Ghent, Belgium
| | - Jean-Charles Lambert
- INSERM, U1167, Laboratoire d'Excellence Distalz, F59000 Lille, France; Institut Pasteur de Lille, F59000 Lille, France; Univ. Lille, F59000 Lille, France.
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23
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Kherrouche Z, Monte D, Werkmeister E, Stoven L, De Launoit Y, Cortot AB, Tulasne D, Chotteau-Lelievre A. PEA3 transcription factors are downstream effectors of Met signaling involved in migration and invasiveness of Met-addicted tumor cells. Mol Oncol 2015; 9:1852-67. [PMID: 26238631 DOI: 10.1016/j.molonc.2015.07.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 06/16/2015] [Accepted: 07/01/2015] [Indexed: 12/31/2022] Open
Abstract
Various solid tumors including lung or gastric carcinomas display aberrant activation of the Met receptor which correlates with aggressive phenotypes and poor prognosis. Although downstream signaling of Met is well described, its integration at the transcriptional level is poorly understood. We demonstrate here that in cancer cells harboring met gene amplification, inhibition of Met activity with tyrosine kinase inhibitors or specific siRNA drastically decreased expression of ETV1, ETV4 and ETV5, three transcription factors constituting the PEA3 subgroup of the ETS family, while expression of the other members of the family were less or not affected. Similar link between Met activity and PEA3 factors expression was found in lung cancer cells displaying resistance to EGFR targeted therapy involving met gene amplification. Using silencing experiments, we demonstrate that the PEA3 factors are required for efficient migration and invasion mediated by Met, while other biological responses such as proliferation or unanchored growth remain unaffected. PEA3 overexpression or silencing revealed that they participated in the regulation of the MMP2 target gene involved in extracellular matrix remodeling. Our results demonstrated that PEA3-subgroup transcription factors are key players of the Met signaling integration involved in regulation of migration and invasiveness.
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Affiliation(s)
- Zoulika Kherrouche
- CNRS UMR 8161, Institut de Biologie de Lille, Institut Pasteur de Lille, Université de Lille, SIRIC ONCOLille, Lille 59021, France
| | - Didier Monte
- CNRS USR 3078, Institut de Recherche Interdisciplinaire, Université de Lille, Villeneuve d'Ascq 59658, France
| | - Elisabeth Werkmeister
- CNRS UMR 8161, Institut de Biologie de Lille, Institut Pasteur de Lille, Université de Lille, SIRIC ONCOLille, Lille 59021, France; BioImaging Center Lille Nord de France, Lille 59021, France
| | - Luc Stoven
- CNRS UMR 8161, Institut de Biologie de Lille, Institut Pasteur de Lille, Université de Lille, SIRIC ONCOLille, Lille 59021, France
| | - Yvan De Launoit
- CNRS UMR 8161, Institut de Biologie de Lille, Institut Pasteur de Lille, Université de Lille, SIRIC ONCOLille, Lille 59021, France
| | - Alexis B Cortot
- CNRS UMR 8161, Institut de Biologie de Lille, Institut Pasteur de Lille, Université de Lille, SIRIC ONCOLille, Lille 59021, France; Thoracic Oncology Department, Lille University Hospital, Université de Lille, France
| | - David Tulasne
- CNRS UMR 8161, Institut de Biologie de Lille, Institut Pasteur de Lille, Université de Lille, SIRIC ONCOLille, Lille 59021, France.
| | - Anne Chotteau-Lelievre
- CNRS UMR 8161, Institut de Biologie de Lille, Institut Pasteur de Lille, Université de Lille, SIRIC ONCOLille, Lille 59021, France
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Ligeon LA, Barois N, Werkmeister E, Bongiovanni A, Lafont F. Structured illumination microscopy and correlative microscopy to study autophagy. Methods 2015; 75:61-8. [PMID: 25667106 DOI: 10.1016/j.ymeth.2015.01.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 10/20/2014] [Revised: 01/23/2015] [Accepted: 01/24/2015] [Indexed: 10/24/2022] Open
Abstract
Autophagy is a predominant eukaryotic mechanism for the engulfment of "portions" of cytoplasm allowing their degradation to recycle metabolites. The autophagy is ubiquitous among the life kingdom revealing the importance of this pathway that appears more complex than previously thought. Several reviews have already addressed how to monitor this pathway and have highlighted the existence of new routes such as the LC3-associated phagocytosis (LAP) and the non-canonical autophagy. The principal difference between autophagosomes and LAP vacuoles is that the former has two limiting membranes positives for LC3 whereas the latter has one. Herein, we propose to emphasize the use of correlative light electron microscopy (CLEM) to answer some autophagy's related questions. The structured illumination microscopy (SIM) relatively easy to implement allows to better observe the Atg proteins recruitment and localization during the autophagy process. While LC3 recruitment is performed using light microscopy the ultrastructural morphological analysis of LC3-vacuoles is ascertained by electron microscopy. Hence, these combined and correlated approaches allow to tackle the LAP vs. autophagosome issue.
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Affiliation(s)
- Laure-Anne Ligeon
- Cellular Microbiology and Physics of Infection, Center for Infection and Immunity of Lille, Institut Pasteur de Lille, F-59021 Lille, France; CNRS UMR8204, F-59021 Lille, France; University of Lille-Nord de France, F-59021 Lille, France.
| | - Nicolas Barois
- INSERM U1019, F-59021 Lille, France; BioImaging Center Lille-Nord de France, IFR142, Institut Pasteur de Lille, F-59021 Lille, France
| | | | - Antonino Bongiovanni
- Cellular Microbiology and Physics of Infection, Center for Infection and Immunity of Lille, Institut Pasteur de Lille, F-59021 Lille, France; BioImaging Center Lille-Nord de France, IFR142, Institut Pasteur de Lille, F-59021 Lille, France
| | - Frank Lafont
- Cellular Microbiology and Physics of Infection, Center for Infection and Immunity of Lille, Institut Pasteur de Lille, F-59021 Lille, France; CNRS UMR8204, F-59021 Lille, France; University of Lille-Nord de France, F-59021 Lille, France; INSERM U1019, F-59021 Lille, France; BioImaging Center Lille-Nord de France, IFR142, Institut Pasteur de Lille, F-59021 Lille, France
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25
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Mouveaux T, Oria G, Werkmeister E, Slomianny C, Fox BA, Bzik DJ, Tomavo S. Nuclear glycolytic enzyme enolase of Toxoplasma gondii functions as a transcriptional regulator. PLoS One 2014; 9:e105820. [PMID: 25153525 PMCID: PMC4143315 DOI: 10.1371/journal.pone.0105820] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [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: 05/01/2014] [Accepted: 07/28/2014] [Indexed: 01/07/2023] Open
Abstract
Apicomplexan parasites including Toxoplasma gondii have complex life cycles within different hosts and their infectivity relies on their capacity to regulate gene expression. However, little is known about the nuclear factors that regulate gene expression in these pathogens. Here, we report that T. gondii enolase TgENO2 is targeted to the nucleus of actively replicating parasites, where it specifically binds to nuclear chromatin in vivo. Using a ChIP-Seq technique, we provide evidence for TgENO2 enrichment at the 5′ untranslated gene regions containing the putative promoters of 241 nuclear genes. Ectopic expression of HA-tagged TgENO1 or TgENO2 led to changes in transcript levels of numerous gene targets. Targeted disruption of TgENO1 gene results in a decrease in brain cyst burden of chronically infected mice and in changes in transcript levels of several nuclear genes. Complementation of this knockout mutant with ectopic TgENO1-HA fully restored normal transcript levels. Our findings reveal that enolase functions extend beyond glycolytic activity and include a direct role in coordinating gene regulation in T. gondii.
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Affiliation(s)
- Thomas Mouveaux
- Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM U 1019, Institut Pasteur de Lille, Université Lille Nord de France, Lille, France
| | - Gabrielle Oria
- Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM U 1019, Institut Pasteur de Lille, Université Lille Nord de France, Lille, France
| | - Elisabeth Werkmeister
- Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM U 1019, Institut Pasteur de Lille, Université Lille Nord de France, Lille, France
| | - Christian Slomianny
- Laboratory of Cell Physiology, INSERM U 1003, Université Lille Nord de France, Villeneuve d'Ascq, France
| | - Barbara A. Fox
- Department of Microbiology and Immunology, The Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, United States of America
| | - David J. Bzik
- Department of Microbiology and Immunology, The Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, United States of America
| | - Stanislas Tomavo
- Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM U 1019, Institut Pasteur de Lille, Université Lille Nord de France, Lille, France
- * E-mail:
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26
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Ligeon LA, Moreau K, Barois N, Bongiovanni A, Lacorre DA, Werkmeister E, Proux-Gillardeaux V, Galli T, Lafont F. Role of VAMP3 and VAMP7 in the commitment of Yersinia pseudotuberculosis to LC3-associated pathways involving single- or double-membrane vacuoles. Autophagy 2014; 10:1588-602. [PMID: 25046114 DOI: 10.4161/auto.29411] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Yersinia pseudotuberculosis can replicate inside macrophages by hijacking autophagy and blocking autophagosome acidification. In bone marrow-derived macrophages, the bacteria are mainly observed inside double-membrane vacuoles positive for LC3, a hallmark of autophagy. Here, we address the question of the membrane traffic during internalization of Yersinia investigating the role of vesicle- associated membrane proteins (VAMPs). First, we show that as in epithelial cells, Yersinia pseudotuberculosis replicates mainly in nonacidic LC3-positive vacuoles. Second, in these cells, we unexpectedly found that VAMP3 localizes preferentially to Yersinia-containing vacuoles (YCVs) with single membranes using correlative light-electron microscopy. Third, we reveal the precise kinetics of VAMP3 and VAMP7 association with YCVs positive for LC3. Fourth, we show that VAMP7 knockdown alters LC3's association with single-and multimembrane-YCVs. Finally, in uninfected epithelial cells stimulated for autophagy, VAMP3 overexpression and knockdown led respectively to a lower and higher number of double-membrane, LC3-positive vesicles. Hence, our results highlight the role that VAMPs play in selection of the pathways leading to generation of ultrastructurally different LC3 compartments and pave the way for determining the full set of docking and fusion proteins involved in Yersinia pseudotuberculosis' intravesicular life cycle.
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Affiliation(s)
- Laure-Anne Ligeon
- Cellular Microbiology of Infectious Pathogens Group; Center for Infection and Immunity of Lille; Institut Pasteur de Lille; Lille, France; CNRS UMR8204; Lille, France; INSERM U1019; Lille, France; University of Lille-Nord de France; Lille, France
| | - Kevin Moreau
- Cellular Microbiology of Infectious Pathogens Group; Center for Infection and Immunity of Lille; Institut Pasteur de Lille; Lille, France; CNRS UMR8204; Lille, France; INSERM U1019; Lille, France; University of Lille-Nord de France; Lille, France
| | - Nicolas Barois
- INSERM U1019; Lille, France; BioImaging Center Lille-Nord de France; IFR142; Institut Pasteur de Lille; Lille, France
| | - Antonino Bongiovanni
- Cellular Microbiology of Infectious Pathogens Group; Center for Infection and Immunity of Lille; Institut Pasteur de Lille; Lille, France; BioImaging Center Lille-Nord de France; IFR142; Institut Pasteur de Lille; Lille, France
| | - Delphine-Armelle Lacorre
- University of Lille-Nord de France; Lille, France; BioImaging Center Lille-Nord de France; IFR142; Institut Pasteur de Lille; Lille, France
| | - Elisabeth Werkmeister
- BioImaging Center Lille-Nord de France; IFR142; Institut Pasteur de Lille; Lille, France; CNRS UM8161; Lille, France
| | - Véronique Proux-Gillardeaux
- Institut Jacques Monod; UMR 7592; CNRS; University of Paris Diderot; Paris, France; INSERM ERL U950; Membrane Traffic in Neuronal & Epithelial Morphogenesis Group; Paris, France
| | - Thierry Galli
- Institut Jacques Monod; UMR 7592; CNRS; University of Paris Diderot; Paris, France; INSERM ERL U950; Membrane Traffic in Neuronal & Epithelial Morphogenesis Group; Paris, France
| | - Frank Lafont
- Cellular Microbiology of Infectious Pathogens Group; Center for Infection and Immunity of Lille; Institut Pasteur de Lille; Lille, France; CNRS UMR8204; Lille, France; INSERM U1019; Lille, France; University of Lille-Nord de France; Lille, France; BioImaging Center Lille-Nord de France; IFR142; Institut Pasteur de Lille; Lille, France
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Potel J, Rassam P, Montpellier C, Kaestner L, Werkmeister E, Tews BA, Couturier C, Popescu CI, Baumert TF, Rubinstein E, Dubuisson J, Milhiet PE, Cocquerel L. EWI-2wint promotes CD81 clustering that abrogates Hepatitis C Virus entry. Cell Microbiol 2013; 15:1234-52. [PMID: 23351194 PMCID: PMC7162402 DOI: 10.1111/cmi.12112] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 12/14/2012] [Accepted: 01/10/2013] [Indexed: 01/07/2023]
Abstract
CD81 is a major receptor for Hepatitis C Virus (HCV). It belongs to the tetraspanin family whose members form dynamic clusters with numerous partner proteins and with one another, forming tetraspanin-enriched areas in the plasma membrane. In our study, we combined single-molecule microscopy and biochemistry experiments to investigate the clustering and membrane behaviour of CD81 in the context of cells expressing EWI-2wint, a natural inhibitor of HCV entry. Interestingly, we found that EWI-2wint reduces the global diffusion of CD81 molecules due to a decrease of the diffusion rate of mobile CD81 molecules and an increase in the proportion of confined molecules. Indeed, we demonstrated that EWI-2wint promotes CD81 clustering and confinement in CD81-enriched areas. In addition, we showed that EWI-2wint influences the colocalization of CD81 with Claudin-1 - a co-receptor required for HCV entry. Together, our results indicate that a change in membrane partitioning of CD81 occurs in the presence of EWI-2wint. This study gives new insights on the mechanism by which HCV enters into its target cells, namely by exploiting the dynamic properties of CD81.
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Affiliation(s)
- Julie Potel
- Hepatitis C Laboratory, Center for Infection and Immunity of Lille, University Lille Nord de France, CNRS-UMR8204, Inserm-U1019, Pasteur Institute of Lille, Lille, France
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Dumas D, Hupont S, Huselstein C, de Isla N, Rousseau M, Werkmeister E, Magdalou J, Menu P, Stoltz JF. SHG as a new modality for large field of view imaging to monitor tissue collagen network. Biomed Mater Eng 2012; 22:159-62. [PMID: 22766715 DOI: 10.3233/bme-2012-0702] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
For this study, we have considered a new large field of view imaging dedicated to matrix collagen (no stained samples). To integrate a multidimensional scale (non-sliced samples), a femtosecond oscillator (two photon excitation laser) has been coupled with a large field optical setup to collect SHG signal. We introduced an index (F-SHG) based on decay time response measured by TCSPC for, respectively, Fluorescence (F) and Second Harmonic Generation (SHG) values. For samples where protein collagen is the major component of extracellular matrix (skin) or not (nacre), we compared the index distribution (from 2 to 12) obtained with large field optical setup. In this work, we showed for the first time that multiscale large field imaging combined to multimodality approaches (SHG-TCSPC) could be an innovative and non invasive technique to detect and identify some biological interest molecules (collagen) in biomedical topics.
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Affiliation(s)
- D Dumas
- CNRS, UMR 7561 et FR3209, Plate Forme d'Imagerie Cellulaire et Tissulaire PTIBC-IBISA, Nancy-Université, Faculté de Médecine, Vandoeuvre-lès-Nancy, France Nancy Universités, Nancy, France.
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29
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Sloves PJ, Delhaye S, Mouveaux T, Werkmeister E, Slomianny C, Hovasse A, Dilezitoko Alayi T, Callebaut I, Gaji R, Schaeffer-Reiss C, Van Dorsselear A, Carruthers V, Tomavo S. Toxoplasma Sortilin-like Receptor Regulates Protein Transport and Is Essential for Apical Secretory Organelle Biogenesis and Host Infection. Cell Host Microbe 2012; 11:515-27. [DOI: 10.1016/j.chom.2012.03.006] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Revised: 02/02/2012] [Accepted: 03/28/2012] [Indexed: 12/16/2022]
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Macho Fernandez E, Chang J, Fontaine J, Bialecki E, Rodriguez F, Werkmeister E, Krieger V, Ehret C, Heurtault B, Fournel S, Frisch B, Betbeder D, Faveeuw C, Trottein F. Activation of invariant Natural Killer T lymphocytes in response to the α-galactosylceramide analogue KRN7000 encapsulated in PLGA-based nanoparticles and microparticles. Int J Pharm 2012; 423:45-54. [DOI: 10.1016/j.ijpharm.2011.04.068] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Revised: 04/06/2011] [Accepted: 04/28/2011] [Indexed: 11/29/2022]
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Fréville A, Landrieu I, García-Gimeno MA, Vicogne J, Montbarbon M, Bertin B, Verger A, Kalamou H, Sanz P, Werkmeister E, Pierrot C, Khalife J. Plasmodium falciparum inhibitor-3 homolog increases protein phosphatase type 1 activity and is essential for parasitic survival. J Biol Chem 2011; 287:1306-21. [PMID: 22128182 DOI: 10.1074/jbc.m111.276865] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Growing evidence indicates that the protein regulators governing protein phosphatase 1 (PP1) activity have crucial functions because their deletion drastically affects cell growth and division. PP1 has been found to be essential in Plasmodium falciparum, but little is known about its regulators. In this study, we have identified a homolog of Inhibitor-3 of PP1, named PfI3. NMR analysis shows that PfI3 belongs to the disordered protein family. High affinity interaction of PfI3 and PfPP1 is demonstrated in vitro using several methods, with an apparent dissociation constant K(D) of 100 nm. We further show that the conserved (41)KVVRW(45) motif is crucial for this interaction as the replacement of the Trp(45) by an Ala(45) severely decreases the binding to PfPP1. Surprisingly, PfI3 was unable to rescue a yeast strain deficient in I3 (Ypi1). This lack of functional orthology was supported as functional assays in vitro have revealed that PfI3, unlike yeast I3 and human I3, increases PfPP1 activity. Reverse genetic approaches suggest an essential role of PfI3 in the growth and/or survival of blood stage parasites because attempts to obtain knock-out parasites were unsuccessful, although the locus of PfI3 is accessible. The main localization of a GFP-tagged PfI3 in the nucleus of all blood stage parasites is compatible with a regulatory role of PfI3 on the activity of nuclear PfPP1.
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Affiliation(s)
- Aline Fréville
- Center for Infection and Immunity of Lille, Inserm U1019-CNRS UMR 8204, University of Lille Nord de France, Institut Pasteur de Lille, 1 Rue du Professeur Calmette, 59019 Lille Cedex, France
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Fauquenoy S, Hovasse A, Sloves PJ, Morelle W, Alayi TD, Slomianny C, Werkmeister E, Schaeffer C, Van Dorsselaer A, Tomavo S. Unusual N-glycan Structures Required for Trafficking Toxoplasma gondii GAP50 to the Inner Membrane Complex Regulate Host Cell Entry Through Parasite Motility*. Mol Cell Proteomics 2011. [DOI: 10.1074/mcp.a111.008953] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Martinez A, Aliouat EM, Standaert-Vitse A, Werkmeister E, Pottier M, Pinçon C, Dei-Cas E, Aliouat-Denis CM. Ploidy of cell-sorted trophic and cystic forms of Pneumocystis carinii. PLoS One 2011; 6:e20935. [PMID: 21695077 PMCID: PMC3114859 DOI: 10.1371/journal.pone.0020935] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Accepted: 05/13/2011] [Indexed: 01/15/2023] Open
Abstract
Once regarded as an AIDS-defining illness, Pneumocystis pneumonia (PcP) is nowadays prevailing in immunocompromised HIV-negative individuals such as patients receiving immunosuppressive therapies or affected by primary immunodeficiency. Moreover, Pneumocystis clinical spectrum is broadening to non-severely-immunocompromised subjects who could be colonized by the fungus while remaining asymptomatic for PcP, thus being able to transmit the infection by airborne route to susceptible hosts. Although the taxonomical position of the Pneumocystis genus has been clarified, several aspects of its life cycle remain elusive such as its mode of proliferation within the alveolus or its ploidy level. As no long-term culture model exists to grow Pneumocystis organisms in vitro, an option was to use a model of immunosuppressed rat infected with Pneumocystis carinii and sort life cycle stage fractions using a high-through-put cytometer. Subsequently, ploidy levels of the P. carinii trophic and cystic form fractions were measured by flow cytometry. In the cystic form, eight contents of DNA were measured thus strengthening the fact that each mature cyst contains eight haploid spores. Following release, each spore evolves into a trophic form. The majority of the trophic form fraction was haploid in our study. Some less abundant trophic forms displayed two contents of DNA indicating that they could undergo (i) mating/fusion leading to a diploid status or (ii) asexual mitotic division or (iii) both. Even less abundant trophic forms with four contents of DNA were suggestive of mitotic divisions occurring following mating in diploid trophic forms. Of interest, was the presence of trophic forms with three contents of DNA, an unusual finding that could be related to asymmetrical mitotic divisions occurring in other fungal species to create genetic diversity at lower energetic expenses than mating. Overall, ploidy data of P. carinii life cycle stages shed new light on the complexity of its modes of proliferation.
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Affiliation(s)
- Anna Martinez
- Université Lille Nord de France, Lille, France
- INSERM U1019, CNRS UMR 8204, Center for Infection and Immunity of Lille (CIIL), Lille, France
- Institut Pasteur de Lille, Lille, France
- UDSL (Université Droit et Santé de Lille), Lille, France
| | - El Moukhtar Aliouat
- Université Lille Nord de France, Lille, France
- INSERM U1019, CNRS UMR 8204, Center for Infection and Immunity of Lille (CIIL), Lille, France
- Institut Pasteur de Lille, Lille, France
- UDSL (Université Droit et Santé de Lille), Lille, France
| | - Annie Standaert-Vitse
- Université Lille Nord de France, Lille, France
- INSERM U1019, CNRS UMR 8204, Center for Infection and Immunity of Lille (CIIL), Lille, France
- Institut Pasteur de Lille, Lille, France
- UDSL (Université Droit et Santé de Lille), Lille, France
| | - Elisabeth Werkmeister
- Institut Pasteur de Lille, Lille, France
- MICPaL Facility, IFR142, CNRS UMR 8161, Lille, France
| | - Muriel Pottier
- Université Lille Nord de France, Lille, France
- INSERM U1019, CNRS UMR 8204, Center for Infection and Immunity of Lille (CIIL), Lille, France
- Institut Pasteur de Lille, Lille, France
- UDSL (Université Droit et Santé de Lille), Lille, France
| | - Claire Pinçon
- Université Lille Nord de France, Lille, France
- UDSL (Université Droit et Santé de Lille), Lille, France
- EA2694, Department of Biostatistics, Lille, France
| | - Eduardo Dei-Cas
- Université Lille Nord de France, Lille, France
- INSERM U1019, CNRS UMR 8204, Center for Infection and Immunity of Lille (CIIL), Lille, France
- Institut Pasteur de Lille, Lille, France
- UDSL (Université Droit et Santé de Lille), Lille, France
- Regional and University Hospital Center (CHULille), Biology & Pathology Center (CBP), Parasitology-Mycology, Lille, France
| | - Cécile-Marie Aliouat-Denis
- Université Lille Nord de France, Lille, France
- INSERM U1019, CNRS UMR 8204, Center for Infection and Immunity of Lille (CIIL), Lille, France
- Institut Pasteur de Lille, Lille, France
- UDSL (Université Droit et Santé de Lille), Lille, France
- * E-mail:
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Fauquenoy S, Hovasse A, Sloves PJ, Morelle W, Dilezitoko Alayi T, Dilezitoko Ayali T, Slomianny C, Werkmeister E, Schaeffer C, Van Dorsselaer A, Tomavo S. Unusual N-glycan structures required for trafficking Toxoplasma gondii GAP50 to the inner membrane complex regulate host cell entry through parasite motility. Mol Cell Proteomics 2011; 10:M111.008953. [PMID: 21610105 DOI: 10.1074/mcp.m111.008953] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Toxoplasma gondii motility, which is essential for host cell entry, migration through host tissues, and invasion, is a unique form of actin-dependent gliding. It is powered by a motor complex mainly composed of myosin heavy chain A, myosin light chain 1, gliding associated proteins GAP45, and GAP50, the only integral membrane anchor so far described. In the present study, we have combined glycomic and proteomic approaches to demonstrate that all three potential N-glycosylated sites of GAP50 are occupied by unusual N-glycan structures that are rarely found on mature mammalian glycoproteins. Using site-directed mutagenesis, we show that N-glycosylation is a prerequisite for GAP50 transport from the endoplasmic reticulum to the Golgi apparatus and for its subsequent delivery into the inner complex membrane. Assembly of key partners into the gliding complex, and parasite motility are severely impaired in the unglycosylated GAP50 mutants. Furthermore, comparative affinity purification using N-glycosylated and unglycosylated GAP50 as bait identified three novel hypothetical proteins including the recently described gliding associated protein GAP40, and we demonstrate that N-glycans are required for efficient binding to gliding partners. Collectively, these results provide the first detailed analyses of T. gondii N-glycosylation functions that are vital for parasite motility and host cell entry.
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Affiliation(s)
- Sylvain Fauquenoy
- Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM U 1019, Institut Pasteur de Lille, Université Lille Nord de France, 59000 Lille, France
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Olguin-Lamas A, Madec E, Hovasse A, Werkmeister E, Callebaut I, Slomianny C, Delhaye S, Mouveaux T, Schaeffer-Reiss C, Van Dorsselaer A, Tomavo S. A novel Toxoplasma gondii nuclear factor TgNF3 is a dynamic chromatin-associated component, modulator of nucleolar architecture and parasite virulence. PLoS Pathog 2011; 7:e1001328. [PMID: 21483487 PMCID: PMC3068996 DOI: 10.1371/journal.ppat.1001328] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Accepted: 03/01/2011] [Indexed: 01/13/2023] Open
Abstract
In Toxoplasma gondii, cis-acting elements present in promoter sequences of genes that are stage-specifically regulated have been described. However, the nuclear factors that bind to these cis-acting elements and regulate promoter activities have not been identified. In the present study, we performed affinity purification, followed by proteomic analysis, to identify nuclear factors that bind to a stage-specific promoter in T. gondii. This led to the identification of several nuclear factors in T. gondii including a novel factor, designated herein as TgNF3. The N-terminal domain of TgNF3 shares similarities with the N-terminus of yeast nuclear FK506-binding protein (FKBP), known as a histone chaperone regulating gene silencing. Using anti-TgNF3 antibodies, HA-FLAG and YFP-tagged TgNF3, we show that TgNF3 is predominantly a parasite nucleolar, chromatin-associated protein that binds specifically to T. gondii gene promoters in vivo. Genome-wide analysis using chromatin immunoprecipitation followed by high-throughput sequencing (ChIP-seq) identified promoter occupancies by TgNF3. In addition, TgNF3 has a direct role in transcriptional control of genes involved in parasite metabolism, transcription and translation. The ectopic expression of TgNF3 in the tachyzoites revealed dynamic changes in the size of the nucleolus, leading to a severe attenuation of virulence in vivo. We demonstrate that TgNF3 physically interacts with H3, H4 and H2A/H2B assembled into bona fide core and nucleosome-associated histones. Furthermore, TgNF3 interacts specifically to histones in the context of stage-specific gene silencing of a promoter that lacks active epigenetic acetylated histone marks. In contrast to virulent tachyzoites, which express the majority of TgNF3 in the nucleolus, the protein is exclusively located in the cytoplasm of the avirulent bradyzoites. We propose a model where TgNF3 acts essentially to coordinate nucleolus and nuclear functions by modulating nucleosome activities during the intracellular proliferation of the virulent tachyzoites of T. gondii. Apicomplexa including Toxoplasma gondii are responsible for a variety of deadly infections. These intracellular parasites have complex life cycles within different hosts and their infectivity relies on their capacity to regulate gene expression in response to different environments. However, to date, little is known about nuclear factors that regulate their gene expression. Here, we have characterized parasite nuclear factors that bind to a stage-specific promoter. We identified several nuclear factors including a novel factor, designated herein as TgNF3. The N-terminal domain of TgNF3 shares similarities with the N-terminus of yeast nuclear FK506-binding protein (FKBP), known as a histone chaperone regulating gene silencing. We show that TgNF3 is predominantly a nucleolar, chromatin-associated protein that specifically binds to T. gondii nucleosome-associated histones and promoters. Genome-wide analysis identified promoter occupancies by TgNF3 and we demonstrated a direct role for this factor in transcriptional control of genes involved in parasite metabolism, transcription and translation. Ectopic expression of TgNF3 induces dynamic changes in the size of the nucleolus, and a severe attenuation of parasite virulence in vivo. In avirulent bradyzoites, TgNF3 is found exclusively in the cytoplasm, suggesting a potential role in regulating nucleolar and nuclear functions in the virulent tachyzoites of T. gondii.
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Affiliation(s)
- Alejandro Olguin-Lamas
- Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM U 1019, Institut Pasteur de Lille, Université Lille Nord de France, Lille, France
- Centre National de la Recherche Scientifique, CNRS UMR 8576, UGSF, Université de Lille 1, Villeneuve d'Ascq, France
| | - Edwige Madec
- Centre National de la Recherche Scientifique, CNRS UMR 8576, UGSF, Université de Lille 1, Villeneuve d'Ascq, France
| | - Agnes Hovasse
- Laboratoire de Spectrométrie de Masse Bioorganique, IPHC, CNRS UMR 7178, Université de Strasbourg, Strasbourg, France
| | - Elisabeth Werkmeister
- Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM U 1019, Institut Pasteur de Lille, Université Lille Nord de France, Lille, France
| | - Isabelle Callebaut
- Centre National de la Recherche Scientifique, Universités Pierre et Marie Curie-Paris 6 et Denis Diderot-Paris 7, UMR7590, Paris, France
| | - Christian Slomianny
- Laboratoire de Physiologie Cellulaire, INSERM U1003, Université de Lille 1, Villeneuve d'Ascq, France
| | - Stephane Delhaye
- Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM U 1019, Institut Pasteur de Lille, Université Lille Nord de France, Lille, France
- Centre National de la Recherche Scientifique, CNRS UMR 8576, UGSF, Université de Lille 1, Villeneuve d'Ascq, France
| | - Thomas Mouveaux
- Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM U 1019, Institut Pasteur de Lille, Université Lille Nord de France, Lille, France
- Centre National de la Recherche Scientifique, CNRS UMR 8576, UGSF, Université de Lille 1, Villeneuve d'Ascq, France
| | - Christine Schaeffer-Reiss
- Laboratoire de Spectrométrie de Masse Bioorganique, IPHC, CNRS UMR 7178, Université de Strasbourg, Strasbourg, France
| | - Alain Van Dorsselaer
- Laboratoire de Spectrométrie de Masse Bioorganique, IPHC, CNRS UMR 7178, Université de Strasbourg, Strasbourg, France
| | - Stanislas Tomavo
- Center for Infection and Immunity of Lille, CNRS UMR 8204, INSERM U 1019, Institut Pasteur de Lille, Université Lille Nord de France, Lille, France
- Centre National de la Recherche Scientifique, CNRS UMR 8576, UGSF, Université de Lille 1, Villeneuve d'Ascq, France
- * E-mail:
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Werkmeister E, de Isla N, Netter P, Stoltz JF, Dumas D. Collagenous Extracellular Matrix of Cartilage Submitted to Mechanical Forces Studied by Second Harmonic Generation Microscopy. Photochem Photobiol 2010; 86:302-10. [DOI: 10.1111/j.1751-1097.2009.00648.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Dumas D, Henrionnet C, Hupont S, Werkmeister E, Stoltz J, Pinzano A, Gillet P. Innovative TCSPC–SHG microscopy imaging to monitor matrix collagen neo-synthetized in bioscaffolds. Biomed Mater Eng 2010; 20:183-8. [DOI: 10.3233/bme-2010-0630] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- D. Dumas
- Physiopathologie, Pharmacologie et Ingénierie Articulaires, UMR 7561 CNRS – Université Nancy I and Ingénierie Moléculaire et Thérapeutique, Faculté de Médecine, Nancy-Université, Vandoeuvre-lès-Nancy, France
| | - C. Henrionnet
- Physiopathologie, Pharmacologie et Ingénierie Articulaires, UMR 7561 CNRS – Université Nancy I and Ingénierie Moléculaire et Thérapeutique, Faculté de Médecine, Nancy-Université, Vandoeuvre-lès-Nancy, France
| | - S. Hupont
- Physiopathologie, Pharmacologie et Ingénierie Articulaires, UMR 7561 CNRS – Université Nancy I and Ingénierie Moléculaire et Thérapeutique, Faculté de Médecine, Nancy-Université, Vandoeuvre-lès-Nancy, France
| | - E. Werkmeister
- Plate-forme Microscopie-Imagerie-Cytométrie du Campus Pasteur Lille, Institut de Biologie de Lille, Institut Pasteur de Lille, Lille, France
| | - J.F. Stoltz
- Physiopathologie, Pharmacologie et Ingénierie Articulaires, UMR 7561 CNRS – Université Nancy I and Ingénierie Moléculaire et Thérapeutique, Faculté de Médecine, Nancy-Université, Vandoeuvre-lès-Nancy, France
| | - A. Pinzano
- Physiopathologie, Pharmacologie et Ingénierie Articulaires, UMR 7561 CNRS – Université Nancy I and Ingénierie Moléculaire et Thérapeutique, Faculté de Médecine, Nancy-Université, Vandoeuvre-lès-Nancy, France
| | - P. Gillet
- Physiopathologie, Pharmacologie et Ingénierie Articulaires, UMR 7561 CNRS – Université Nancy I and Ingénierie Moléculaire et Thérapeutique, Faculté de Médecine, Nancy-Université, Vandoeuvre-lès-Nancy, France
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D'Hallewin MA, Kochetkov D, Viry-Babel Y, Leroux A, Werkmeister E, Dumas D, Gräfe S, Zorin V, Guillemin F, Bezdetnaya L. Photodynamic therapy with intratumoral administration of Lipid-Based mTHPC in a model of breast cancer recurrence. Lasers Surg Med 2009; 40:543-9. [PMID: 18798287 DOI: 10.1002/lsm.20662] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND AND OBJECTIVES Generalized skin sensitization is a main drawback of photodynamic therapy with systemic administration of photosensitizers. We have evaluated the potential use of an intratumoral injection of a liposomal formulation of mTHPC (Foslip) in a mouse model of local recurrence of breast cancer. MATERIALS AND METHODS Mice were directly injected into the tumor (IT) with 25 microl of a Foslip suspension (0.15 mg/ml) and illumination (652 nm, 20 J/cm(2)) was performed at different time points with pathological assessment after 48 hours. In a parallel mice series plasma samples were obtained at different endpoints after IT Foslip injection for HPLC analysis and the tumors were subjected in toto to macrofluorescence imaging. Fluorescence polarization measurements were conducted in vitro to estimate the rate of sensitizer redistribution from liposomes. RESULTS Optimal, albeit partial, cure rates were obtained at 24 hours post-sensitizer and uninistration. Inhomogeneous and weak fluorescence was observed at early time points and became maximal at 24 hours. Plasma levels of mTHPC increased until 15 hours. Fluorescence polarization measurements showed a slow sensitizer transfer from liposomes to model membranes. DISCUSSION AND CONCLUSION The weak intratumoral fluorescence at early time points could be explained by concentration quenching within the liposomes as evidenced from fluorescence polarization studies. Progressive mTHPC redistribution from liposomes and its further incorporation into tumor tissue resulted in fluorescence build-up over time with a maximum at 24 hours post-injection. This correlates perfectly with the best therapeutic effect at this time point. The absence of total cure can be attributed to inhomogeneous photosensitizer distribution. mTHPC is reabsorbed into the blood stream but the total administered amount is much reduced as opposed to systemic administration so that repeated PDT sessions might be favorable in terms of side effects and tumor response.
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Affiliation(s)
- Marie Ange D'Hallewin
- Centre de Recherche en Automatique de Nancy, Nancy-University, CNRS, Centre Alexis Vautrin, Vandoeuvre les Nancy, France.
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Werkmeister E, de Isla N, Marchal L, Stoltz JF, Dumas D. Interest of second harmonic generation imaging for diagnosis in thick and opaque tissue. Biorheology 2008; 45:375-383. [PMID: 18836238] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In articular hyaline cartilage, chondrocytes are surrounded by an extracellular matrix which is mainly composed by collagen and proteoglycanes. Pathological specimens show a partial or complete degradation of this matrix. Therefore, it could be interesting to know how mechanical or biochemical constraints applied to cartilage specimens induce modifications of the cartilage network. Multiphoton technology combined to Second Harmonic Generation (SHG) enables to image cartilage specimens in a non-invasive mode with high resolution at deep penetration. By placing a band pass filter in front of the transmitted light detector, SHG signal with frequency doubled can be isolated for a new contrast imaging. SHG (second harmonic generation) is a diffusion process generated from organized structures and does not need any fluorescent staining. Due to their non-centrosymetric structure, collagen fibrilles present a high second-order non-linear susceptibility and thus give rise to a strong SHG signal when exposed to high enough electric fields produced by a focal point of a femtosecond pulsed laser (multiphoton microscopy). As the extracellular matrix of cartilage is in part constituted by collagen fibers, it can be imaged with this contrast tool. The intensity of SHG signals strongly depends on the organization of collagen fibers. Thus a modification of the extracellular matrix in terms of 3D-organization of collagen induced by mechanical stress can be shown with this contrast tool.
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Affiliation(s)
- E Werkmeister
- CNRS - Groupe d'Ingénierie Cellulaire et Tissulaire, Faculté de Médecine, Nancy-Université - UHP, UMR 7563, 54 505 Vandoeuvre-lès-Nancy, France.
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Werkmeister E, de Isla N, Marchal L, Stoltz J, Dumas D. Interest of second harmonic generation imaging for diagnosis in thick and opaque tissue. Biorheology 2008. [DOI: 10.3233/bir-2008-0483] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- E. Werkmeister
- CNRS – Groupe d'Ingénierie Cellulaire et Tissulaire, Faculté de Médecine, Nancy-Université – UHP, UMR 7563, 54 505 Vandoeuvre-lès-Nancy, France
| | - N. de Isla
- CNRS – Groupe d'Ingénierie Cellulaire et Tissulaire, Faculté de Médecine, Nancy-Université – UHP, UMR 7563, 54 505 Vandoeuvre-lès-Nancy, France
| | - L. Marchal
- CNRS – Groupe d'Ingénierie Cellulaire et Tissulaire, Faculté de Médecine, Nancy-Université – UHP, UMR 7563, 54 505 Vandoeuvre-lès-Nancy, France
| | - J.F. Stoltz
- CNRS – Groupe d'Ingénierie Cellulaire et Tissulaire, Faculté de Médecine, Nancy-Université – UHP, UMR 7563, 54 505 Vandoeuvre-lès-Nancy, France
- Unité de Thérapie Cellulaire et Tissulaire – Brabois, CHU Nancy, 54 500 Vandoeuvre-lès-Nancy, France
| | - D. Dumas
- CNRS – Groupe d'Ingénierie Cellulaire et Tissulaire, Faculté de Médecine, Nancy-Université – UHP, UMR 7563, 54 505 Vandoeuvre-lès-Nancy, France
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Werkmeister E, Dumas D, de Isla N, Marchal L, Stoltz JF. Interest of multimodal imaging in tissue engineering. Biomed Mater Eng 2008; 18:329-333. [PMID: 19065043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Affiliation(s)
- Elisabeth Werkmeister
- CNRS - Groupe d'Ingénierie Cellulaire et Tissulaire, UMR 7563, Faculté de Médecine, Nancy Université, Vandoeuvre-lès-Nancy, France.
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Affiliation(s)
- Elisabeth Werkmeister
- CNRS – Groupe d'Ingénierie Cellulaire et Tissulaire, UMR 7563, Faculté de Médecine, Nancy Université, Vandoeuvre-lès-Nancy, France
| | - Dominique Dumas
- CNRS – Groupe d'Ingénierie Cellulaire et Tissulaire, UMR 7563, Faculté de Médecine, Nancy Université, Vandoeuvre-lès-Nancy, France
| | - Natalia de Isla
- CNRS – Groupe d'Ingénierie Cellulaire et Tissulaire, UMR 7563, Faculté de Médecine, Nancy Université, Vandoeuvre-lès-Nancy, France
| | - Luc Marchal
- CNRS – Groupe d'Ingénierie Cellulaire et Tissulaire, UMR 7563, Faculté de Médecine, Nancy Université, Vandoeuvre-lès-Nancy, France
| | - Jean-François Stoltz
- CNRS – Groupe d'Ingénierie Cellulaire et Tissulaire, UMR 7563, Faculté de Médecine, Nancy Université, Vandoeuvre-lès-Nancy, France
- Unité de Thérapie Cellulaire, CHU Nancy, Brabois Vandoeuvre-lès-Nancy, France
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Werkmeister E, Kerdjoudj H, Marchal L, Stoltz JF, Dumas D. Multiphoton microscopy for blood vessel imaging: new non-invasive tools (Spectral, SHG, FLIM). Clin Hemorheol Microcirc 2007; 37:77-88. [PMID: 17641398] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Imaging thick and opaque tissue, like blood vessel, in a noninvasive mode with high resolution, is nowadays possible with multiphoton technology. A near-infrared excitation presents the advantage to be compatible with living specimens and allows a deep penetration into tissues. The nonlinear excitation process is followed by several deactivation ways, among which fluorescence emission can be represented with Spectral or Lifetime imaging. Applied to ex vivo blood vessel imaging, these techniques enabled us to discriminate cell structures (nucleus, cytoskeleton) by fluorescent labelling (Hoechst, QDots). Another method, based on 2-photon excitation and which doesn't need any exogenous dye has also been experimented on arteries: SHG (Second Harmonic Generation) is a diffusion process generated from organized structures. Collagen molecules give rise to a strong SHG signal, enabling us to image the arterial wall (3-dimensional extracellular matrix).
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Affiliation(s)
- E Werkmeister
- LEMTA CNRS UMR 7563 et IFR CNRS 111-Bioingéniérie, Nancy Université, Faculté de Médecine Nancy Groupe de Mécanique et Ingénierie Cellulaire et Tissulaire, 54 505 Vandoeuvre-lès-Nancy, France.
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