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Guegan H, Poirier W, Ravenel K, Dion S, Delabarre A, Desvillechabrol D, Pinson X, Sergent O, Gallais I, Gangneux JP, Giraud S, Gastebois A. Deciphering the Role of PIG1 and DHN-Melanin in Scedosporium apiospermum Conidia. J Fungi (Basel) 2023; 9:jof9020134. [PMID: 36836250 PMCID: PMC9965090 DOI: 10.3390/jof9020134] [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: 12/13/2022] [Revised: 01/10/2023] [Accepted: 01/16/2023] [Indexed: 01/20/2023] Open
Abstract
Scedosporium apiospermum is a saprophytic filamentous fungus involved in human infections, of which the virulence factors that contribute to pathogenesis are still poorly characterized. In particular, little is known about the specific role of dihydroxynaphtalene (DHN)-melanin, located on the external layer of the conidia cell wall. We previously identified a transcription factor, PIG1, which may be involved in DHN-melanin biosynthesis. To elucidate the role of PIG1 and DHN-melanin in S. apiospermum, a CRISPR-Cas9-mediated PIG1 deletion was carried out from two parental strains to evaluate its impact on melanin biosynthesis, conidia cell-wall assembly, and resistance to stress, including the ability to survive macrophage engulfment. ΔPIG1 mutants did not produce melanin and showed a disorganized and thinner cell wall, resulting in a lower survival rate when exposed to oxidizing conditions, or high temperature. The absence of melanin increased the exposure of antigenic patterns on the conidia surface. PIG1 regulates the melanization of S. apiospermum conidia, and is involved in the survival to environmental injuries and to the host immune response, that might participate in virulence. Moreover, a transcriptomic analysis was performed to explain the observed aberrant septate conidia morphology and found differentially expressed genes, underlining the pleiotropic function of PIG1.
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Affiliation(s)
- Hélène Guegan
- CHU Rennes, INSERM, EHESP, IRSET (Institut de Recherche en Santé Environnement et Travail)—UMR_S 1085, 35000 Rennes, France
- Correspondence: ; Tel.: +33-223233496
| | - Wilfried Poirier
- University of Angers, University of Brest, IRF, SFR ICAT, 49000 Angers, France
| | - Kevin Ravenel
- University of Angers, University of Brest, IRF, SFR ICAT, 49000 Angers, France
| | - Sarah Dion
- INSERM, EHESP, IRSET (Institut de Recherche en Santé Environnement et Travail)—UMR_S 1085, 35000 Rennes, France
| | - Aymeric Delabarre
- INSERM, EHESP, IRSET (Institut de Recherche en Santé Environnement et Travail)—UMR_S 1085, 35000 Rennes, France
| | - Dimitri Desvillechabrol
- Institut Pasteur, Université Paris Cité, Plate-Forme Technologique Biomics, 75015 Paris, France
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, 75015 Paris, France
| | - Xavier Pinson
- CNRS, INSERM, Biosit UAR 3480 US_S 018, MRic Core Facility, 35000 Rennes, France
| | - Odile Sergent
- INSERM, EHESP, IRSET (Institut de Recherche en Santé Environnement et Travail)—UMR_S 1085, 35000 Rennes, France
| | - Isabelle Gallais
- INSERM, EHESP, IRSET (Institut de Recherche en Santé Environnement et Travail)—UMR_S 1085, 35000 Rennes, France
| | - Jean-Pierre Gangneux
- CHU Rennes, INSERM, EHESP, IRSET (Institut de Recherche en Santé Environnement et Travail)—UMR_S 1085, 35000 Rennes, France
| | - Sandrine Giraud
- University of Angers, University of Brest, IRF, SFR ICAT, 49000 Angers, France
| | - Amandine Gastebois
- University of Angers, University of Brest, IRF, SFR ICAT, 49000 Angers, France
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Chiechio RM, Ducarre S, Marets C, Dupont A, Even-Hernandez P, Pinson X, Dutertre S, Artzner F, Musumeci P, Ravel C, Faro MJL, Marchi V. Encapsulation of Luminescent Gold Nanoclusters into Synthetic Vesicles. Nanomaterials (Basel) 2022; 12:nano12213875. [PMID: 36364651 PMCID: PMC9655092 DOI: 10.3390/nano12213875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 10/24/2022] [Accepted: 10/26/2022] [Indexed: 06/02/2023]
Abstract
Gold nanoclusters (Au NCs) are attractive luminescent nanoprobes for biomedical applications. In vivo biosensing and bioimaging requires the delivery of the Au NCs into subcellular compartments. In this view, we explore here the possible encapsulation of ultra-small-sized red and blue emitting Au NCs into liposomes of various sizes and chemical compositions. Different methods were investigated to prepare vesicles containing Au NCs in their lumen. The efficiency of the process was correlated to the structural and morphological aspect of the Au NCs' encapsulating vesicles thanks to complementary analyses by SAXS, cryo-TEM, and confocal microscopy techniques. Cell-like-sized vesicles (GUVs) encapsulating red or blue Au NCs were successfully obtained by an innovative method using emulsion phase transfer. Furthermore, exosome-like-sized vesicles (LUVs) containing Au NCs were obtained with an encapsulation yield of 40%, as estimated from ICP-MS.
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Affiliation(s)
- Regina M. Chiechio
- Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Université Rennes 1, F-35000 Rennes, France
- Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università Di Catania, Via Santa Sofia 64, 95123 Catania, Italy
- IMM-CNR, Via S. Sofia 64, 95123 Catania, Italy
| | | | - Célia Marets
- Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Université Rennes 1, F-35000 Rennes, France
| | - Aurélien Dupont
- BIOSIT, Inserm, CNRS UMS 3480, Université Rennes1, US_S 018, F-35000 Rennes, France
| | - Pascale Even-Hernandez
- Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Université Rennes 1, F-35000 Rennes, France
| | - Xavier Pinson
- Microscopy Rennes Imaging Centre, SFR Biosit, CNRS UMS 3480—US INSERM 018, Université Rennes 1, F-35000 Rennes, France
| | - Stéphanie Dutertre
- Microscopy Rennes Imaging Centre, SFR Biosit, CNRS UMS 3480—US INSERM 018, Université Rennes 1, F-35000 Rennes, France
| | - Franck Artzner
- Institut de Physique, CNRS UMR 6251, Université Rennes 1, F-35000 Rennes, France
| | - Paolo Musumeci
- Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università Di Catania, Via Santa Sofia 64, 95123 Catania, Italy
| | - Célia Ravel
- Service de Biologie de la Reproduction-CECOS, CHU Rennes, F-35000 Rennes, France
- Irset (Institut de Recherche en Santé, Environnement et Travail), Inserm, EHESP, Université Rennes 1, F-35000 Rennes, France
| | - Maria Jose Lo Faro
- Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università Di Catania, Via Santa Sofia 64, 95123 Catania, Italy
- IMM-CNR, Via S. Sofia 64, 95123 Catania, Italy
| | - Valérie Marchi
- Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Université Rennes 1, F-35000 Rennes, France
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Gutierrez C, Pinson X, Jarnouen K, Charpentier M, Pineau R, Lallement L, Pedeux R. Characterization of the Peri-Membrane Fluorescence Phenomenon Allowing the Detection of Urothelial Tumor Cells in Urine. Cancers (Basel) 2022; 14:cancers14092171. [PMID: 35565300 PMCID: PMC9105609 DOI: 10.3390/cancers14092171] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/14/2022] [Accepted: 04/21/2022] [Indexed: 02/01/2023] Open
Abstract
Simple Summary To detect bladder cancer (BC), urinary cytology and cystoscopy are the primary diagnostic tests used. Urine cytology is non-invasive, easy to collect, with medium sensitivity and high specificity. It is an effective way to detect high-grade BC, but it is less effective on low-grade BC because the rate of equivocal results is much higher, making them difficult to detect. Despite the implementation of new diagnostics, urinary cytology and cystoscopy remain the gold standard. Instead of looking for new diagnostics, one of the new research areas is the improvement of urinary cytology. Recently, the fluorescent properties of plasma membranes of urothelial tumor cells, called peri-membrane fluorescence, found in urinary cytology have been shown to be useful in improving the early detection of BC. The main objective of this study was to characterize the peri-membrane fluorescence allowing the detection of urothelial tumor cells in urine. Abstract Urine cytology is non-invasive, easy to collect, with medium sensitivity and a high specificity. It is an effective way to detect high-grade bladder cancer (BC), but it is less effective on low-grade BC because the rate of equivocal results is much higher. Recently, the fluorescent properties of plasma membranes of urothelial tumor cells (UTC) found in urine cytology have been shown to be useful in improving the early detection of BC. This phenomenon is called peri-membrane fluorescence (PMF). Based on previous studies that have identified the PMF on UTCs, the main objective was to characterize this phenomenon. For this study, a software was specially created to quantify the PMF of all tested cells and different treatments performed. PMF was not found to be a morphological and discriminating feature of UTCs, all cells in shape and not from urine show PMF. We were able to highlight the crucial role of plasma membrane integrity in the maintenance of PMF. Finally, it was found that the induction of a strong cellular stress induced a decrease in PMF, mimicking what was observed in non-tumor cells collected from urine. These results suggest that PMF is found in cells able to resist this stress, such as tumor cells.
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Affiliation(s)
- Charly Gutierrez
- University Rennes, INSERM, OSS-UMR_S 1242, CLCC Eugène Marquis, 35042 Rennes, France; (C.G.); (M.C.); (R.P.)
| | - Xavier Pinson
- University Rennes, CNRS, Inserm, Biosit UAR3480 US_S 018, MRic Core Facility, 35000 Rennes, France;
| | - Kathleen Jarnouen
- VitaDX International, 74F Rue de Paris, 35000 Rennes, France; (K.J.); (L.L.)
| | - Marine Charpentier
- University Rennes, INSERM, OSS-UMR_S 1242, CLCC Eugène Marquis, 35042 Rennes, France; (C.G.); (M.C.); (R.P.)
| | - Raphael Pineau
- University Rennes, INSERM, OSS-UMR_S 1242, CLCC Eugène Marquis, 35042 Rennes, France; (C.G.); (M.C.); (R.P.)
| | - Laëtitia Lallement
- VitaDX International, 74F Rue de Paris, 35000 Rennes, France; (K.J.); (L.L.)
| | - Rémy Pedeux
- University Rennes, INSERM, OSS-UMR_S 1242, CLCC Eugène Marquis, 35042 Rennes, France; (C.G.); (M.C.); (R.P.)
- Correspondence: ; Tel.: +33-223-234-702
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Kachaner D, Pinson X, El Kadhi KB, Normandin K, Talje L, Lavoie H, Lépine G, Carréno S, Kwok BH, Hickson GR, Archambault V. Interdomain allosteric regulation of Polo kinase by Aurora B and Map205 is required for cytokinesis. ACTA ACUST UNITED AC 2014; 207:201-11. [PMID: 25332165 PMCID: PMC4210448 DOI: 10.1083/jcb.201408081] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [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] [Indexed: 01/01/2023]
Abstract
Aurora B phosphorylation of the Polo kinase activation loop disrupts its binding to Map205 and central spindle microtubules, allowing it to be recruited to the site of cytokinesis. Drosophila melanogaster Polo and its human orthologue Polo-like kinase 1 fulfill essential roles during cell division. Members of the Polo-like kinase (Plk) family contain an N-terminal kinase domain (KD) and a C-terminal Polo-Box domain (PBD), which mediates protein interactions. How Plks are regulated in cytokinesis is poorly understood. Here we show that phosphorylation of Polo by Aurora B is required for cytokinesis. This phosphorylation in the activation loop of the KD promotes the dissociation of Polo from the PBD-bound microtubule-associated protein Map205, which acts as an allosteric inhibitor of Polo kinase activity. This mechanism allows the release of active Polo from microtubules of the central spindle and its recruitment to the site of cytokinesis. Failure in Polo phosphorylation results in both early and late cytokinesis defects. Importantly, the antagonistic regulation of Polo by Aurora B and Map205 in cytokinesis reveals that interdomain allosteric mechanisms can play important roles in controlling the cellular functions of Plks.
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Affiliation(s)
- David Kachaner
- Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Xavier Pinson
- Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Khaled Ben El Kadhi
- Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Karine Normandin
- Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Lama Talje
- Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Hugo Lavoie
- Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Guillaume Lépine
- Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Sébastien Carréno
- Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Benjamin H Kwok
- Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Gilles R Hickson
- Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Vincent Archambault
- Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada Institut de Recherche en Immunologie et en Cancérologie, Départment de Biochimie et Médecine Moléculaire, Centre Hospitalier Universitaire Sainte-Justine, Département de Pathologie et de Biologie Cellulaire, Département de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
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Abstract
Centrosomes act as major microtubule-organizing centers in most cell types. Their functions in interphase and mitosis are usually facilitated by their association with the nucleus. This may be particularly true in very large cells. Several papers report free centrosomes in syncytial Drosophila embryos. However, this phenotype often remains little explored. Yet, free centrosomes can occur by multiple mechanisms, including functional defects of the mitotic spindle, detachment of centrosomes from the nuclear envelope, centrosome inactivation upon DNA damage, and de novo centrosome genesis. Deciphering the cellular mechanism leading to free centrosomes upon a given perturbation such as a mutation or injection of a drug, can provide valuable clues regarding the nature of the molecular pathway affected. To this end, genetic and cytological tests, as well as time-lapse imaging are available. These studies can inform on the biology of centrosomes, cell cycle regulation and cytoskeletal dynamics. Here we briefly discuss what to make of free centrosomes in the fly embryo.
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Affiliation(s)
- Vincent Archambault
- Institut de recherche en Immunologie et en Cancérologie, Université de Montréal, QC, Canada.
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Diarra-Mehrpour M, Arrabal S, Jalil A, Pinson X, Gaudin C, Piétu G, Pitaval A, Ripoche H, Eloit M, Dormont D, Chouaib S. Prion protein prevents human breast carcinoma cell line from tumor necrosis factor alpha-induced cell death. Cancer Res 2004; 64:719-27. [PMID: 14744790 DOI: 10.1158/0008-5472.can-03-1735] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
To define genetic determinants of tumor cell resistance to the cytotoxic action of tumor necrosis factor alpha (TNF), we have applied cDNA microarrays to a human breast carcinoma TNF-sensitive MCF7 cell line and its established TNF-resistant clone. Of a total of 5760 samples of cDNA examined, 3.6% were found to be differentially expressed in TNF-resistant 1001 cells as compared with TNF-sensitive MCF7 cells. On the basis of available literature data, the striking finding is the association of some differentially expressed genes involved in the phosphatidylinositol-3-kinase/Akt signaling pathway. More notably, we found that the PRNP gene coding for the cellular prion protein (PrP(c)), was 17-fold overexpressed in the 1001 cell line as compared with the MCF7 cell line. This differential expression was confirmed at the cell surface by immunostaining that indicated that PrP(c) is overexpressed at both mRNA and protein levels in the TNF-resistant derivative. Using recombinant adenoviruses expressing the human PrP(c,) our data demonstrate that PrP(c) overexpression converted TNF-sensitive MCF7 cells into TNF-resistant cells, at least in part, by a mechanism involving alteration of cytochrome c release from mitochondria and nuclear condensation.
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Affiliation(s)
- Maryam Diarra-Mehrpour
- Laboratoire de Cytokines et Immunologie des Tumeurs Humaines, Institut National de la Santé et de la Recherche Médicale U-487, Institut Gustave Roussy Pavillon de Recherche 1 and Institut Fédératif de Recherche, Villejuif, France.
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