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Centonze G, Natalini D, Grasso S, Morellato A, Salemme V, Piccolantonio A, D'Attanasio G, Savino A, Bianciotto OT, Fragomeni M, Scavuzzo A, Poncina M, Nigrelli F, De Gregorio M, Poli V, Arina P, Taverna D, Kopecka J, Dupont S, Turco E, Riganti C, Defilippi P. p140Cap modulates the mevalonate pathway decreasing cell migration and enhancing drug sensitivity in breast cancer cells. Cell Death Dis 2023; 14:849. [PMID: 38123597 PMCID: PMC10733353 DOI: 10.1038/s41419-023-06357-z] [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: 10/20/2023] [Revised: 11/09/2023] [Accepted: 11/30/2023] [Indexed: 12/23/2023]
Abstract
p140Cap is an adaptor protein involved in assembling multi-protein complexes regulating several cellular processes. p140Cap acts as a tumor suppressor in breast cancer (BC) and neuroblastoma patients, where its expression correlates with a better prognosis. The role of p140Cap in tumor metabolism remains largely unknown. Here we study the role of p140Cap in the modulation of the mevalonate (MVA) pathway in BC cells. The MVA pathway is responsible for the biosynthesis of cholesterol and non-sterol isoprenoids and is often deregulated in cancer. We found that both in vitro and in vivo, p140Cap cells and tumors show an increased flux through the MVA pathway by positively regulating the pace-maker enzyme of the MVA pathway, the 3-hydroxy-3-methyl-glutaryl-coenzyme A reductase (HMGCR), via transcriptional and post-translational mechanisms. The higher cholesterol synthesis is paralleled with enhanced cholesterol efflux. Moreover, p140Cap promotes increased cholesterol localization in the plasma membrane and reduces lipid rafts-associated Rac1 signalling, impairing cell membrane fluidity and cell migration in a cholesterol-dependent manner. Finally, p140Cap BC cells exhibit decreased cell viability upon treatments with statins, alone or in combination with chemotherapeutic at low concentrations in a synergistic manner. Overall, our data highlight a new perspective point on tumor suppression in BC by establishing a previously uncharacterized role of the MVA pathway in p140Cap expressing tumors, thus paving the way to the use of p140Cap as a potent biomarker to stratify patients for better tuning therapeutic options.
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Affiliation(s)
- Giorgia Centonze
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Dora Natalini
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Silvia Grasso
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Alessandro Morellato
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Vincenzo Salemme
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Alessio Piccolantonio
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Giacomo D'Attanasio
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Aurora Savino
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Olga Teresa Bianciotto
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Matteo Fragomeni
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Andrea Scavuzzo
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Matteo Poncina
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Francesca Nigrelli
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Mario De Gregorio
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Valeria Poli
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Pietro Arina
- UCL, Bloomsbury Institute of Intensive Care Medicine, Division of Medicine, University College London, WC1E 6BT, London, UK
| | - Daniela Taverna
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Joanna Kopecka
- Department of Oncology, University of Torino, Italy; Molecular Biotechnology Center, Piazza Nizza 44, 10126, Torino, Italy
| | - Sirio Dupont
- Department of Molecular Medicine (DMM), University of Padova, Padua, Italy
| | - Emilia Turco
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Chiara Riganti
- Department of Oncology, University of Torino, Italy; Molecular Biotechnology Center, Piazza Nizza 44, 10126, Torino, Italy.
| | - Paola Defilippi
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126, Torino, Italy.
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Aboubakr O, Houillier C, Choquet S, Dupont S, Hoang-Xuan K, Mathon B. Epileptic seizures in patients with primary central nervous system lymphoma: A systematic review. Rev Neurol (Paris) 2023:S0035-3787(23)01116-5. [PMID: 38042665 DOI: 10.1016/j.neurol.2023.08.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 08/28/2023] [Accepted: 08/29/2023] [Indexed: 12/04/2023]
Abstract
BACKGROUND Primary central nervous system lymphoma (PCNSL) accounts for less than 5% of primary brain tumors. Epileptic seizures are a common manifestation of brain tumors; however, literature on the prevalence, characteristics, and oncological implications of seizures in patients with PCNSL is limited, and the management of antiepileptic drugs (AEDs) is unclear. This review aimed to summarize the existing knowledge on seizures in PCNSL, their potential association with surgery, oncological treatment, survival rates, and management of AEDs. METHODS A systematic review was performed according to the PRISMA recommendations and included articles published between 1953 and 2023 describing seizures in patients with PCNSL. RESULTS The search identified 282 studies, of which 21 were included. Up to 33% of patients with PCNSL developed seizures, mostly at the initial presentation. Little information was found on changes in seizure incidence through the course of the disease, and no details were found on seizure frequency, the percentage of treatment-resistant patients, or the evolution of seizures at remission. Younger age, cortical location, and immunodeficiency have been identified as potential risk factors for seizures, but evidence is very limited. The growing use of vigorous treatments including intensive chemotherapy with autologous stem cell transplantation and immunotherapy with CAR-T cells is associated with a higher incidence of seizures. The association between seizure development and patient mortality in PCNSL remains unknown. There are no data on AED prophylaxis or the use of specific AEDs in PCNSL. CONCLUSIONS Further studies are needed to investigate seizures in larger cohorts of PCNSL, to clarify their prevalence, better characterize them, identify risk factors, analyze survival rates, and make recommendations on AED management. We recommend following general practice guidelines for seizures symptomatic of brain tumors and not to prescribe AED prophylaxis in PCNSL.
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Affiliation(s)
- O Aboubakr
- Sorbonne University, Department of Neurosurgery, la Pitié-Salpêtrière Hospital, AP-HP, 75013 Paris, France
| | - C Houillier
- Department of Neurology 2 Mazarin, la Pitié-Salpêtrière Hospital, IHU, ICM, AP-HP, Sorbonne University, 75013 Paris, France
| | - S Choquet
- Department of Hematology, la Pitié-Salpêtrière Hospital, AP-HP, Sorbonne University, 75013 Paris, France
| | - S Dupont
- Epileptology Unit, Department of Rehabilitation, AP-HP, La Pitié-Salpêtrière Hospital, Sorbonne University, 75013 Paris, France
| | - K Hoang-Xuan
- Department of Neurology 2 Mazarin, la Pitié-Salpêtrière Hospital, IHU, ICM, AP-HP, Sorbonne University, 75013 Paris, France
| | - B Mathon
- Sorbonne University, Department of Neurosurgery, la Pitié-Salpêtrière Hospital, AP-HP, 75013 Paris, France; Paris Brain Institute, ICM, Inserm U 1127, CNRS UMR 7225, Sorbonne University, UMRS 1127, 75013 Paris, France; GRC 23, Brain Machine Interface, la Pitié-Salpêtrière Hospital, AP-HP, Sorbonne University, 75013 Paris, France.
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Phuyal S, Romani P, Dupont S, Farhan H. Mechanobiology of organelles: illuminating their roles in mechanosensing and mechanotransduction. Trends Cell Biol 2023; 33:1049-1061. [PMID: 37236902 DOI: 10.1016/j.tcb.2023.05.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [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: 02/02/2023] [Revised: 05/02/2023] [Accepted: 05/02/2023] [Indexed: 05/28/2023]
Abstract
Mechanobiology studies the mechanisms by which cells sense and respond to physical forces, and the role of these forces in shaping cells and tissues themselves. Mechanosensing can occur at the plasma membrane, which is directly exposed to external forces, but also in the cell's interior, for example, through deformation of the nucleus. Less is known on how the function and morphology of organelles are influenced by alterations in their own mechanical properties, or by external forces. Here, we discuss recent advances on the mechanosensing and mechanotransduction of organelles, including the endoplasmic reticulum (ER), the Golgi apparatus, the endo-lysosmal system, and the mitochondria. We highlight open questions that need to be addressed to gain a broader understanding of the role of organelle mechanobiology.
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Affiliation(s)
- Santosh Phuyal
- Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - Patrizia Romani
- Department of Molecular Medicine, University of Padua, Padua, Italy
| | - Sirio Dupont
- Department of Molecular Medicine, University of Padua, Padua, Italy.
| | - Hesso Farhan
- Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway; Institute of Pathophysiology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria.
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Noè R, Inglese N, Romani P, Serafini T, Paoli C, Calciolari B, Fantuz M, Zamborlin A, Surdo NC, Spada V, Spacci M, Volta S, Ermini ML, Di Benedetto G, Frusca V, Santi C, Lefkimmiatis K, Dupont S, Voliani V, Sancineto L, Carrer A. Organic Selenium induces ferroptosis in pancreatic cancer cells. Redox Biol 2023; 68:102962. [PMID: 38029455 DOI: 10.1016/j.redox.2023.102962] [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] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 11/10/2023] [Indexed: 12/01/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDA) cells reprogram both mitochondrial and lysosomal functions to support growth. At the same time, this causes significant dishomeostasis of free radicals. While this is compensated by the upregulation of detoxification mechanisms, it also represents a potential vulnerability. Here we demonstrate that PDA cells are sensitive to the inhibition of the mevalonate pathway (MVP), which supports the biosynthesis of critical antioxidant intermediates and protect from ferroptosis. We attacked the susceptibility of PDA cells to ferroptotic death with selenorganic compounds, including dibenzyl diselenide (DBDS) that exhibits potent pro-oxidant properties and inhibits tumor growth in vitro and in vivo. DBDS treatment induces the mobilization of iron from mitochondria enabling uncontrolled lipid peroxidation. Finally, we showed that DBDS and statins act synergistically to promote ferroptosis and provide evidence that combined treatment is a viable strategy to combat PDA.
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Affiliation(s)
- Roberta Noè
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy; Department of Biology, University of Padova, 35126, Padova, Italy
| | - Noemi Inglese
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy; Department of Biology, University of Padova, 35126, Padova, Italy
| | - Patrizia Romani
- Department of Molecular Medicine, University of Padova, 35126, Padova, Italy
| | - Thauan Serafini
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy
| | - Carlotta Paoli
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy; Department of Biology, University of Padova, 35126, Padova, Italy
| | - Beatrice Calciolari
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy; Department of Biology, University of Padova, 35126, Padova, Italy
| | - Marco Fantuz
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy; Department of Biology, University of Padova, 35126, Padova, Italy
| | - Agata Zamborlin
- NEST-Scuola Normale Superiore, 56127, Pisa, Italy; Center for Nanotechnology Innovation, Istituto Italiano di Tecnologia, 56127, Pisa, Italy
| | - Nicoletta C Surdo
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy; Neuroscience Institute, National Research Council (CNR), 35121, Padova, Italy
| | - Vittoria Spada
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy
| | - Martina Spacci
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy; Department of Biology, University of Padova, 35126, Padova, Italy
| | - Sara Volta
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy
| | - Maria Laura Ermini
- Center for Nanotechnology Innovation, Istituto Italiano di Tecnologia, 56127, Pisa, Italy
| | - Giulietta Di Benedetto
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy; Neuroscience Institute, National Research Council (CNR), 35121, Padova, Italy
| | - Valentina Frusca
- Center for Nanotechnology Innovation, Istituto Italiano di Tecnologia, 56127, Pisa, Italy; Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127, Pisa, Italy
| | - Claudio Santi
- Group of Catalysis and Green Organic Chemistry, Department of Pharmaceutical Sciences, University of Perugia, 06122, Perugia, PG, Italy
| | - Konstantinos Lefkimmiatis
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy; Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Sirio Dupont
- Department of Molecular Medicine, University of Padova, 35126, Padova, Italy
| | - Valerio Voliani
- Center for Nanotechnology Innovation, Istituto Italiano di Tecnologia, 56127, Pisa, Italy; Department of Pharmacy, School of Medical and Pharmaceutical Sciences, University of Genova, 16148, Genoa, Italy.
| | - Luca Sancineto
- Group of Catalysis and Green Organic Chemistry, Department of Pharmaceutical Sciences, University of Perugia, 06122, Perugia, PG, Italy.
| | - Alessandro Carrer
- Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy; Department of Biology, University of Padova, 35126, Padova, Italy.
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Tezak B, Straková B, Fullard DJ, Dupont S, McKey J, Weber C, Capel B. Higher temperatures directly increase germ cell number, promoting feminization of red-eared slider turtles. Curr Biol 2023:S0960-9822(23)00758-3. [PMID: 37354900 DOI: 10.1016/j.cub.2023.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/09/2023] [Accepted: 06/01/2023] [Indexed: 06/26/2023]
Abstract
In many reptile species, gonadal sex is affected by environmental temperature during a critical period of embryonic development-a process known as temperature-dependent sex determination (TSD).1 The oviparous red-eared slider turtle, Trachemys scripta, has a warm-female/cool-male TSD system and is among the best-studied members of this group.2 When incubated at low temperatures, the somatic cells of the bipotential gonad differentiate into Sertoli cells, the support cells of the testis, whereas at high temperatures, they differentiate into granulosa cells, the support cells of the ovary.3 Here, we report the unexpected finding that temperature independently affects the number of primordial germ cells (GCs) in the embryonic gonad at a time before somatic cell differentiation has initiated. Specifically, embryos incubated at higher, female-inducing temperatures have more GCs than those incubated at the male-inducing temperature. Furthermore, elimination of GCs in embryos incubating at intermediate temperatures results in a strong shift toward male-biased sex ratios. This is the first evidence that temperature affects GC number and the first evidence that GC number influences sex determination in amniotes. This observation has two important implications. First, it supports a new model in which temperature can impact sex determination in incremental ways through multiple cell types. Second, the findings have important implications for a major unresolved question in the fields of ecology and evolutionary biology-the adaptive significance of TSD. We suggest that linking high GC number with female development improves female reproductive potential and provides an adaptive advantage for TSD.
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Affiliation(s)
- B Tezak
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27701, USA
| | - B Straková
- Department of Ecology, Faculty of Science Charles University, Viničná 7, Praha 2 12844, Czech Republic
| | - D J Fullard
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27701, USA
| | - S Dupont
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27701, USA
| | - J McKey
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27701, USA
| | - C Weber
- Division of Biological Sciences, Section of Cell and Developmental Biology, UC San Diego, La Jolla, CA 92093, USA
| | - B Capel
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27701, USA.
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Herlin B, Uszynski I, Chauvel M, Poupon C, Dupont S. Cross-subject variability of the optic radiation anatomy in a cohort of 1065 healthy subjects. Surg Radiol Anat 2023:10.1007/s00276-023-03161-4. [PMID: 37195302 DOI: 10.1007/s00276-023-03161-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 04/28/2023] [Indexed: 05/18/2023]
Abstract
INTRODUCTION Optic radiations are tracts of particular interest for neurosurgery, especially for temporal lobe resection, because their lesion is responsible for visual field defects. However, histological and MRI studies found a high inter-subject variability of the optic radiation anatomy, especially for their most rostral extent inside the Meyer's temporal loop. We aimed to better assess inter-subject anatomical variability of the optic radiations, in order to help to reduce the risk of postoperative visual field deficiencies. METHODS Using an advanced analysis pipeline relying on a whole-brain probabilistic tractography and fiber clustering, we processed the diffusion MRI data of the 1065 subjects of the HCP cohort. After registration in a common space, a cross-subject clustering on the whole cohort was performed to reconstruct the reference optic radiation bundle, from which all optic radiations were segmented on an individual scale. RESULTS We found a median distance between the rostral tip of the temporal pole and the rostral tip of the optic radiation of 29.2 mm (standard deviation: 2.1 mm) for the right side and 28.8 mm (standard deviation: 2.3 mm) for the left side. The difference between both hemispheres was statistically significant (p = 1.10-8). CONCLUSION We demonstrated inter-individual variability of the anatomy of the optic radiations on a large-scale study, especially their rostral extension. In order to better guide neurosurgical procedures, we built a MNI-based reference atlas of the optic radiations that can be used for fast optic radiation reconstruction from any individual diffusion MRI tractography.
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Affiliation(s)
- B Herlin
- BAOBAB, NeuroSpin, Université Paris-Saclay, CNRS, CEA, Gif-Sur-Yvette, France.
- AP-HP, Epilepsy Unit, GH Pitié-Salpêtrière-Charles Foix, 47-83 Boulevard de L'Hôpital, 75013, Paris, France.
- Sorbonne Université, Paris, France.
| | - I Uszynski
- BAOBAB, NeuroSpin, Université Paris-Saclay, CNRS, CEA, Gif-Sur-Yvette, France
| | - M Chauvel
- BAOBAB, NeuroSpin, Université Paris-Saclay, CNRS, CEA, Gif-Sur-Yvette, France
| | - C Poupon
- BAOBAB, NeuroSpin, Université Paris-Saclay, CNRS, CEA, Gif-Sur-Yvette, France
| | - S Dupont
- AP-HP, Epilepsy Unit, GH Pitié-Salpêtrière-Charles Foix, 47-83 Boulevard de L'Hôpital, 75013, Paris, France
- Sorbonne Université, Paris, France
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Nineuil C, Houot M, Dellacherie D, Méré M, Denos M, Dupont S, Samson S. Revisiting emotion recognition in different types of temporal lobe epilepsy: The influence of facial expression intensity. Epilepsy Behav 2023; 142:109191. [PMID: 37030041 DOI: 10.1016/j.yebeh.2023.109191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 02/27/2023] [Accepted: 03/18/2023] [Indexed: 04/10/2023]
Abstract
Temporal lobe epilepsy (TLE) can induce various difficulties in recognizing emotional facial expressions (EFE), particularly for negative valence emotions. However, these difficulties have not been systematically examined according to the localization of the epileptic focus. For this purpose, we used a forced-choice recognition task in which faces expressing fear, sadness, anger, disgust, surprise, or happiness were presented in different intensity levels from moderate to high intensity. The first objective of our study was to evaluate the impact of emotional intensity on the recognition of different categories of EFE in TLE patients compared to control participants. The second objective was to assess the effect of localizationof epileptic focus on the recognition of EFE in patients with medial temporal lobe epilepsy (MTLE) associated or not with hippocampal sclerosis (HS), or lateral temporal lobe epilepsy (LTLE). The results showed that the 272 TLE patients and the 68 control participants were not differently affected by the intensity of EFE. However, we obtained group differences within the clinical population when we took into account the localization of the temporal lobe epileptic focus. As predicted, TLE patients were impaired in recognizing fear and disgust relative to controls. Moreover, the scores of these patients varied according to the localization of the epileptic focus, but not according to the cerebral lateralization of TLE. The facial expression of fear was less well recognized by MTLE patients, with or without HS, and the expression of disgust was less well recognized by LTLE as well as MTLE without HS patients. Moreover, emotional intensity modulated differently the recognition of disgust and surprise of the three patient groups underlying the relevance of using moderate emotional intensity to distinguish the effect of epileptic focus localization. These findings should be taken into account for interpreting the emotional behaviors and deserve to befurther investigated before considering TLE surgical treatment or social cognition interventions in TLE patients.
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Affiliation(s)
- C Nineuil
- Univ. Lille, ULR 4072 - PSITEC - Psychologie : Interactions Temps Émotions Cognition, F-59000 Lille, France
| | - M Houot
- Centre of Excellence of Neurodegenerative Disease (CoEN), AP-HP, Pitié-Salpêtrière Hospital, Paris, France; Institute of Memory and Alzheimer's Disease (IM2A), Department of Neurology, AP-HP, Pitié-Salpêtrière Hospital, Paris, France; Clinical Investigation Centre, Institut du Cerveau et de la Moelle épinière (ICM), Pitié-Salpêtrière Hospital, Paris, France
| | - D Dellacherie
- Univ. Lille, ULR 4072 - PSITEC - Psychologie : Interactions Temps Émotions Cognition, F-59000 Lille, France; CHU Lille, Department of Pediatric Neurology, F-59000 Lille, France
| | - M Méré
- Epilepsy Unit, AP-HP, Pitié-Salpêtrière Hospital, Paris, France
| | - M Denos
- Rehabilitation Unit, AP-HP, Pitié-Salpêtrière Hospital, Paris, France
| | - S Dupont
- Epilepsy Unit, AP-HP, Pitié-Salpêtrière Hospital, Paris, France; Centre de Recherche de l'Institut du Cerveau Et de La Moelle Épinière (ICM), UMPC-UMR 7225 CNRS-UMRS 975 Inserm, Paris, France
| | - S Samson
- Univ. Lille, ULR 4072 - PSITEC - Psychologie : Interactions Temps Émotions Cognition, F-59000 Lille, France; Epilepsy Unit, AP-HP, Pitié-Salpêtrière Hospital, Paris, France; Centre de Recherche de l'Institut du Cerveau Et de La Moelle Épinière (ICM), UMPC-UMR 7225 CNRS-UMRS 975 Inserm, Paris, France.
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Filadi R, De Mario A, Audano M, Romani P, Pedretti S, Cardenas C, Dupont S, Mammucari C, Mitro N, Pizzo P. Sustained IP3-linked Ca2+ signaling promotes progression of triple negative breast cancer cells by regulating fatty acid metabolism. Front Cell Dev Biol 2023; 11:1071037. [PMID: 36994106 PMCID: PMC10040683 DOI: 10.3389/fcell.2023.1071037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 03/03/2023] [Indexed: 03/14/2023] Open
Abstract
Rewiring of mitochondrial metabolism has been described in different cancers as a key step for their progression. Calcium (Ca2+) signaling regulates mitochondrial function and is known to be altered in several malignancies, including triple negative breast cancer (TNBC). However, whether and how the alterations in Ca2+ signaling contribute to metabolic changes in TNBC has not been elucidated. Here, we found that TNBC cells display frequent, spontaneous inositol 1,4,5-trisphosphate (IP3)-dependent Ca2+ oscillations, which are sensed by mitochondria. By combining genetic, pharmacologic and metabolomics approaches, we associated this pathway with the regulation of fatty acid (FA) metabolism. Moreover, we demonstrated that these signaling routes promote TNBC cell migration in vitro, suggesting they might be explored to identify potential therapeutic targets.
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Affiliation(s)
- Riccardo Filadi
- Neuroscience Institute, National Research Council (CNR), Padua, Italy
- Department of Biomedical Sciences, University of Padova, Padua, Italy
- *Correspondence: Riccardo Filadi, ,
| | - Agnese De Mario
- Department of Biomedical Sciences, University of Padova, Padua, Italy
| | - Matteo Audano
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
| | - Patrizia Romani
- Department of Molecular Medicine (DMM), University of Padova, Padua, Italy
| | - Silvia Pedretti
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
| | - Cesar Cardenas
- Faculty of Sciences, Universidad Mayor, Center for Integrative Biology, Santiago, Chile
- Geroscience Center for Brain Health and Metabolism, Santiago, Chile
- Buck Institute for Research on Aging, Novato, CA, United States
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, United States
| | - Sirio Dupont
- Department of Molecular Medicine (DMM), University of Padova, Padua, Italy
| | - Cristina Mammucari
- Department of Biomedical Sciences, University of Padova, Padua, Italy
- Myology Center (CIR-Myo), University of Padova, Padua, Italy
| | - Nico Mitro
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
- Department of Experimental Oncology, European Institute of Oncology IRCCS, Milan, Italy
| | - Paola Pizzo
- Neuroscience Institute, National Research Council (CNR), Padua, Italy
- Department of Biomedical Sciences, University of Padova, Padua, Italy
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Degremont A, Kerbtrat S, Corbillon E, Dupont S, Jachiet PA. Etude sur le parcours de soins des patients épileptiques dans le Système national des données de santé (SNDS). Rev Epidemiol Sante Publique 2023. [DOI: 10.1016/j.respe.2023.101509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023] Open
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Dupont S. L’épilepsie: un modèle pour comprendre la psychose? Bulletin de l'Académie Nationale de Médecine 2023. [DOI: 10.1016/j.banm.2022.10.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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Dupont S. Anatomie fonctionnelle de l’hippocampe : applications à l’épilepsie. Bulletin de l'Académie Nationale de Médecine 2022. [DOI: 10.1016/j.banm.2022.10.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Dauger S, Blanot S, Deho A, Beaux J, Bonnin F, Bordet F, Cremer R, Dupont S, Klusiewicz A, Lafargue A, Lemains M, Michel F, Quéré R, Blanquat LDS, Samyn M, Saulnier ML, Temper L, Merchaoui Z, Roux BGL. Organ donation by Maastricht-III pediatric patients: Recommendations of the Groupe Francophone de Réanimation et Urgences Pédiatriques (GFRUP) and Association des Anesthésistes Réanimateurs Pédiatriques d'Expression Française (ADARPEF). Part II: Specific organizational and technical considerations. Arch Pediatr 2022; 29:509-515. [PMID: 36055866 DOI: 10.1016/j.arcped.2022.06.001] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 05/04/2022] [Accepted: 06/18/2022] [Indexed: 06/15/2023]
Abstract
A panel of pediatric experts met to develop recommendations on the technical requirements specific to pediatric controlled donation after planned withdrawal of life-sustaining therapies (Maastricht category III). The panel recommends following the withdrawal of life-sustaining therapies protocol usually applied in each unit, which may or may not include immediate extubation. The organ retrieval process should be halted if death does not occur within 3 h of life-support discontinuation. Circulatory arrest is defined as loss of pulsatile arterial pressure and should be followed by a 5-min no-touch observation period. Death is declared based on a list of clinical criteria assessed by two senior physicians. The no-flow time should be no longer than 30, 45, and 90 min for the liver, kidneys, and lungs, respectively. At present, the panel does not recommend pediatric heart donation after death by circulatory arrest. The mean arterial pressure cutoff that defines the start of the functional warm ischemia (FWI) phase is 45 mmHg in patients older than 5 years and/or weighing more than 20 kg. The panel recommends normothermic regional perfusion in these patients. The FWI phase should not exceed 30 and 45 min for retrieving the pancreas and liver, respectively. There is no time limit to the FWI phase for the lungs and kidneys. The panel recommends routine sharing of experience with Maastricht-III donation among all healthcare institutions involved in order to ensure optimal outcome assessment and continuous discussion on the potential difficulties, notably those related to the management of normothermic regional perfusion in small children.
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Affiliation(s)
- S Dauger
- Service de Médecine Intensive-Réanimation Pédiatriques, Hôpital Robert-Debré, Assistance Publique-Hôpitaux de Paris, Université de Paris, France; Coordination Hospitalière de Prélèvements d'Organes et de Tissus, Centre Hospitalier Universitaire de Lille, Université de Lille, France.
| | - S Blanot
- Coordination Hospitalière de Prélèvements d'Organes et de Tissus, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Université de Paris, France; Service d'Anesthésie-Réanimation Pédiatrique, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Université de Paris-Cité, France
| | - A Deho
- Service de Médecine Intensive-Réanimation Pédiatriques, Hôpital Robert-Debré, Assistance Publique-Hôpitaux de Paris, Université de Paris, France; Coordination Hospitalière de Prélèvements d'Organes, Hôpital Robert-Debré, Assistance Publique-Hôpitaux de Paris, Université de Paris-Cité, France
| | - J Beaux
- Coordination Hospitalière de Prélèvements d'Organes et de Tissus, Hôpital de la Timone, Assistance Publique-Hôpitaux de Marseille, Université de Marseille, France
| | - F Bonnin
- Coordination Hospitalière de Prélèvements d'Organes et de Tissus, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Université de Paris, France
| | - F Bordet
- Service de Réanimation Médico-Chirurgicale Pédiatrique, Hôpital Femme-Mère-Enfant, Hôpitaux Civils de Lyon, Université de Lyon, France
| | - R Cremer
- Espace de réflexion éthique régional des Hauts-de-France, Centre Hospitalier Universitaire de Lille, Université de Lille, France; Service de Réanimation et Surveillance Continue Pédiatriques, Hôpital Jeanne de Flandre, Centre Hospitalier Universitaire de Lille, Université de Lille, France
| | - S Dupont
- Coordination Hospitalière de Prélèvements d'Organes, Hôpital Robert-Debré, Assistance Publique-Hôpitaux de Paris, Université de Paris-Cité, France
| | - A Klusiewicz
- Coordination Hospitalière de Prélèvements d'Organes et de Tissus, Hôpital de Bicêtre, Assistance Publique-Hôpitaux de Paris, Université de Paris-Saclay, France
| | - A Lafargue
- Service d'Anesthésie Réanimation Pédiatrique, Hôpital Jeanne de Flandres, Centre Hospitalier Régional Universitaire de Lille, Université de Lille, France
| | - M Lemains
- Coordination Hospitalière de Prélèvements d'Organes et de Tissus, Hôpital de Bicêtre, Assistance Publique-Hôpitaux de Paris, Université de Paris-Saclay, France
| | - F Michel
- Service d'Anesthésie Réanimation Pédiatrique, Hôpital de la Timone, Assistance Publique-Hôpitaux de Marseille, Université de Marseille, France
| | - R Quéré
- Coordination Hospitalière de Prélèvements d'Organes et de Tissus, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Université de Paris, France
| | - L de Saint Blanquat
- Service de Réanimation Médico-Chirurgicale Pédiatrique, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Université de Paris-Cité, France
| | - M Samyn
- Coordination Hospitalière de Prélèvements d'Organes et de Tissus, Hôpital de Bicêtre, Assistance Publique-Hôpitaux de Paris, Université de Paris-Saclay, France
| | - M-L Saulnier
- Coordination Hospitalière de Prélèvements d'Organes et de Tissus, Hôpital Mère-Enfant, Centre Hospitalier Universitaire de Nantes, Université de Nantes, France
| | - L Temper
- Coordination Hospitalière de Prélèvements d'Organes et de Tissus, Hôpital Femme-Mère-Enfant, Hospices Civils de Lyon, Université de Lyon, France
| | - Z Merchaoui
- Coordination Hospitalière de Prélèvements d'Organes et de Tissus, Hôpital de Bicêtre, Assistance Publique-Hôpitaux de Paris, Université de Paris-Saclay, France; Service de Réanimation Pédiatrique et de Médecine Néonatale, Hôpital de Bicêtre, Assistance Publique-Hôpitaux de Paris, Université de Paris-Saclay, France
| | - B Gaillard-Le Roux
- Service de Réanimation Médico-Chirurgicale Pédiatrique, Hôpital Mère-Enfant, Centre Hospitalier Universitaire de Nantes, Université de Nantes, France
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Gaillard-Le Roux B, Cremer R, de Saint Blanquat L, Beaux J, Blanot S, Bonnin F, Bordet F, Deho A, Dupont S, Klusiewicz A, Lafargue A, Lemains M, Merchaoui Z, Quéré R, Samyn M, Saulnier ML, Temper L, Michel F, Dauger S. Organ donation by Maastricht-III pediatric patients: Recommendations of the Groupe Francophone de Réanimation et Urgences Pédiatriques (GFRUP) and Association des Anesthésistes Réanimateurs Pédiatriques d'Expression Française (ADARPEF) Part I: Ethical considerations and family care. Arch Pediatr 2022; 29:502-508. [DOI: 10.1016/j.arcped.2022.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 05/04/2022] [Accepted: 06/18/2022] [Indexed: 11/27/2022]
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Romani P, Nirchio N, Arboit M, Barbieri V, Tosi A, Michielin F, Shibuya S, Benoist T, Wu D, Hindmarch CCT, Giomo M, Urciuolo A, Giamogante F, Roveri A, Chakravarty P, Montagner M, Calì T, Elvassore N, Archer SL, De Coppi P, Rosato A, Martello G, Dupont S. Mitochondrial fission links ECM mechanotransduction to metabolic redox homeostasis and metastatic chemotherapy resistance. Nat Cell Biol 2022; 24:168-180. [PMID: 35165418 PMCID: PMC7615745 DOI: 10.1038/s41556-022-00843-w] [Citation(s) in RCA: 63] [Impact Index Per Article: 31.5] [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: 12/29/2020] [Accepted: 01/06/2022] [Indexed: 01/07/2023]
Abstract
Metastatic breast cancer cells disseminate to organs with a soft microenvironment. Whether and how the mechanical properties of the local tissue influence their response to treatment remains unclear. Here we found that a soft extracellular matrix empowers redox homeostasis. Cells cultured on a soft extracellular matrix display increased peri-mitochondrial F-actin, promoted by Spire1C and Arp2/3 nucleation factors, and increased DRP1- and MIEF1/2-dependent mitochondrial fission. Changes in mitochondrial dynamics lead to increased production of mitochondrial reactive oxygen species and activate the NRF2 antioxidant transcriptional response, including increased cystine uptake and glutathione metabolism. This retrograde response endows cells with resistance to oxidative stress and reactive oxygen species-dependent chemotherapy drugs. This is relevant in a mouse model of metastatic breast cancer cells dormant in the lung soft tissue, where inhibition of DRP1 and NRF2 restored cisplatin sensitivity and prevented disseminated cancer-cell awakening. We propose that targeting this mitochondrial dynamics- and redox-based mechanotransduction pathway could open avenues to prevent metastatic relapse.
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Affiliation(s)
- Patrizia Romani
- Department of Molecular Medicine (DMM), University of Padua, Padua, Italy
| | - Nunzia Nirchio
- Department of Molecular Medicine (DMM), University of Padua, Padua, Italy
| | - Mattia Arboit
- Department of Biology (DiBio), University of Padua, Padua, Italy
| | - Vito Barbieri
- Department of Surgery, Oncology and Gastroenterology (DiSCOG), University of Padua, Padua, Italy
- Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | - Anna Tosi
- Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | - Federica Michielin
- Institute of Child Health, NIHR Biomedical Research Centre, Great Ormond Street Institute of Child Health, UCL, London, UK
| | - Soichi Shibuya
- Institute of Child Health, NIHR Biomedical Research Centre, Great Ormond Street Institute of Child Health, UCL, London, UK
| | - Thomas Benoist
- Institute of Child Health, NIHR Biomedical Research Centre, Great Ormond Street Institute of Child Health, UCL, London, UK
| | - Danchen Wu
- Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | | | - Monica Giomo
- Department of Industrial Engineering (DII), University of Padua, Padua, Italy
- Venetian Institute of Molecular Medicine (VIMM), Padua, Italy
| | - Anna Urciuolo
- Department of Molecular Medicine (DMM), University of Padua, Padua, Italy
- Fondazione Istituto di Ricerca Pediatrica (IRP), Città della Speranza, Padua, Italy
| | - Flavia Giamogante
- Department of Biomedical Sciences (DSB), University of Padua, Padua, Italy
| | - Antonella Roveri
- Department of Molecular Medicine (DMM), University of Padua, Padua, Italy
| | | | - Marco Montagner
- Department of Molecular Medicine (DMM), University of Padua, Padua, Italy
| | - Tito Calì
- Department of Biomedical Sciences (DSB), University of Padua, Padua, Italy
| | - Nicola Elvassore
- Institute of Child Health, NIHR Biomedical Research Centre, Great Ormond Street Institute of Child Health, UCL, London, UK
- Department of Industrial Engineering (DII), University of Padua, Padua, Italy
- Venetian Institute of Molecular Medicine (VIMM), Padua, Italy
| | - Stephen L Archer
- Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | - Paolo De Coppi
- Institute of Child Health, NIHR Biomedical Research Centre, Great Ormond Street Institute of Child Health, UCL, London, UK
| | - Antonio Rosato
- Department of Surgery, Oncology and Gastroenterology (DiSCOG), University of Padua, Padua, Italy
- Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | | | - Sirio Dupont
- Department of Molecular Medicine (DMM), University of Padua, Padua, Italy.
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Budowski C, Zavanone C, Thivard L, Vassilev K, Dupont S. Early tolerability of Comirnaty vaccine in patients with chronic neurological diseases. Rev Neurol (Paris) 2021; 177:1262-1265. [PMID: 34654546 PMCID: PMC8511656 DOI: 10.1016/j.neurol.2021.05.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 11/05/2022]
Abstract
Patients with chronic neurological diseases may have predisposing risk factors for severe COVID-19 and should be considered as priority candidates for SARS-CoV-2 vaccination. Nevertheless, the safety of RNA vaccine was evaluated in healthy volunteers or in patients with stable chronic medical conditions excluding patients with chronic neurological diseases. We report here the early tolerability of Comirnaty vaccine in 36 patients with chronic neurological diseases and demonstrate good early tolerability, better than found in healthy people in phase 3 trials.
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Affiliation(s)
- C Budowski
- Rehabilitation Unit, Hôpital de la Pitié-Salpêtrière, AP-HP, 47, boulevard de l'Hôpital, 75651 Paris cedex 13, France; Sorbonne Université, Faculté de médecine, 91-105 boulevard de l'hôpital, 75013 Paris, France.
| | - C Zavanone
- Rehabilitation Unit, Hôpital de la Pitié-Salpêtrière, AP-HP, 47, boulevard de l'Hôpital, 75651 Paris cedex 13, France
| | - L Thivard
- Rehabilitation Unit, Hôpital de la Pitié-Salpêtrière, AP-HP, 47, boulevard de l'Hôpital, 75651 Paris cedex 13, France
| | - K Vassilev
- Rehabilitation Unit, Hôpital de la Pitié-Salpêtrière, AP-HP, 47, boulevard de l'Hôpital, 75651 Paris cedex 13, France
| | - S Dupont
- Rehabilitation Unit, Hôpital de la Pitié-Salpêtrière, AP-HP, 47, boulevard de l'Hôpital, 75651 Paris cedex 13, France; Sorbonne Université, Faculté de médecine, 91-105 boulevard de l'hôpital, 75013 Paris, France; UMPC-UMR 7225 CNRS-UMRS 975 Inserm, Centre de recherche de l'Institut du Cerveau et de la Moelle Epinière (ICM), Paris, France
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Thomas B, Aupy J, Penchet G, De Montaudouin M, Bartolomei F, Biraben A, Catenoix H, Chassoux F, Dupont S, Valton L, Michel V, Marchal C. Predictive factors of postoperative outcome in the elderly after resective epilepsy surgery. Rev Neurol (Paris) 2021; 178:609-615. [PMID: 34801264 DOI: 10.1016/j.neurol.2021.08.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 07/25/2021] [Accepted: 08/31/2021] [Indexed: 10/19/2022]
Abstract
OBJECTIVE To evaluate the efficiency of resective epilepsy surgery (RES) in patients over 50 years and determine prognostic factors. RESULTS Over the 147 patients over 50 years (54.9±3.8 years [50-69]) coming from 8 specialized French centres for epilepsy surgery, 72.1%, patients were seizure-free and 91.2% had a good outcome 12 months after RES. Seizure freedom was not associated with the age at surgery or duration of epilepsy. In multivariate analysis, seizure freedom was associated with MRI and neuropathological hippocampal sclerosis (HS) (P=0.009 and P=0.028 respectively), PET hypometabolism (P=0.013), temporal epilepsy (P=0.01). On the contrary, the need for intracranial exploration was associated with a poorer prognosis (P=0.001). Postoperative number of antiepileptic drugs was significantly lower in the seizure-free group (P=0.001). Neurological adverse event rate after surgery was 21.1% and 11.7% of patients had neuropsychological adverse effects overall transient. CONCLUSIONS RES is effective procedure in the elderly. Even safe it remains at higher risk of complication and population should be carefully selected. Nevertheless, age should not be considered as a limiting factor, especially when good prognostic factors are identified.
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Affiliation(s)
- B Thomas
- Department of Clinical Neurosciences, Bordeaux University Hospital, Bordeaux, France
| | - J Aupy
- Department of Clinical Neurosciences, Bordeaux University Hospital, Bordeaux, France; IMN, UMR CNRS 5293, University of Bordeaux, Bordeaux Neurocampus, Bordeaux, France.
| | - G Penchet
- Department of Neurosurgery, Bordeaux University Hospital, Bordeaux, France
| | - M De Montaudouin
- Department of Clinical Neurosciences, Bordeaux University Hospital, Bordeaux, France
| | - F Bartolomei
- Clinical Neurophysiology and Epileptology Department, APHM, Timone Hospital, Marseille, France; INS, Institut de Neurosciences des Systèmes, Aix-Marseille University, Marseille, France
| | - A Biraben
- Department of Neurology, University Hospital of Rennes, Rennes, France
| | - H Catenoix
- Department of Functional Neurology and Epileptology, Hospices Civils de Lyon, Lyon, France
| | - F Chassoux
- Department of Neurosurgery, Sainte-Anne Hospital Centre, Paris, France
| | - S Dupont
- Epilepsy Unit, La Pitié-Salpêtrière University Hospital, AP-HP, Paris, France
| | - L Valton
- Department of Neurology, Toulouse University Hospital, Toulouse, France
| | - V Michel
- Department of Clinical Neurosciences, Bordeaux University Hospital, Bordeaux, France
| | - C Marchal
- Department of Clinical Neurosciences, Bordeaux University Hospital, Bordeaux, France
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Abou-Khalil Y, Azar Y, Elbitar S, Lebel MN, Deschildre C, Ghaleb Y, Dupont S, Guillas I, Le Goff W, Le Goff C, Boileau C, Varret M, Fadel MA, Michel J, El Khoury P. PCSK9 in the development of human atherosclerosis. Atherosclerosis 2021. [DOI: 10.1016/j.atherosclerosis.2021.06.190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tyrer P, Wang D, Crawford M, Dupont S, Cooper S, Nourmand S, Lazarevic V, Philip A, Tyrer H. Sustained benefit of cognitive behaviour therapy for health anxiety in medical patients (CHAMP) over eight years: randomised controlled trial - CORRIGENDUM. Psychol Med 2021; 51:1723. [PMID: 32489159 DOI: 10.1017/s0033291720001932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- P Tyrer
- Centre for Mental Health, Faculty of Medicine, Imperial College, London, UK
| | - D Wang
- Department of Statistics, Liverpool School of Tropical Medicine, Liverpool, UK
| | - M Crawford
- Centre for Mental Health, Faculty of Medicine, Imperial College, London, UK
| | - S Dupont
- Central Northwest London Foundation NHS Trust, London, UK
| | - S Cooper
- Centre for Mental Health, Faculty of Medicine, Imperial College, London, UK
| | - S Nourmand
- Centre for Mental Health, Faculty of Medicine, Imperial College, London, UK
| | - V Lazarevic
- Centre for Mental Health, Faculty of Medicine, Imperial College, London, UK
| | - A Philip
- South London and Maudsley NHS Foundation Trust, London, UK
| | - H Tyrer
- Centre for Mental Health, Faculty of Medicine, Imperial College, London, UK
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Tyrer P, Wang D, Crawford M, Dupont S, Cooper S, Nourmand S, Lazarevic V, Philip A, Tyrer H. Sustained benefit of cognitive behaviour therapy for health anxiety in medical patients (CHAMP) over 8 years: a randomised-controlled trial. Psychol Med 2021; 51:1714-1722. [PMID: 32174296 DOI: 10.1017/s003329172000046x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Health anxiety is an under-recognised but a frequent cause of distress. It is particularly common in general hospitals. METHODS We carried out an 8-year follow-up of medical out-patients with health anxiety (hypochondriasis) enrolled in a randomised-controlled trial in five general hospitals in London, Middlesex and Nottinghamshire. Randomisation was to a mean of six sessions of cognitive behaviour therapy adapted for health anxiety (CBT-HA) or to standard care in the clinics. The primary outcome was a change in score on the Short Health Anxiety Inventory, with generalised anxiety and depression as secondary outcomes. Of 444 patients aged 16-75 years seen in cardiology, endocrinology, gastroenterology, neurology and respiratory medicine clinics, 306 (68.9%) were followed-up 8 years after randomisation, including 36 who had died. The study is registered with controlled-trials.com, ISRCTN14565822. RESULTS There was a significant difference in the HAI score in favour of CBT-HA over standard care after 8 years [1.83, 95% confidence interval (CI) 0.25-3.40, p = 0.023], between group differences in generalised anxiety were less (0.54, 95% CI -0.29 to 1.36), p = 0.20, ns), but those for depression were greater at 8 years (1.22, 95% CI 0.42-2.01, p < 0.003) in CBT-HA than in standard care, most in standard care satisfying the criteria for clinical depression. Those seen by nurse therapists and in cardiology and gastrointestinal clinics achieved the greatest gains with CBT-HA, with greater improvement in both symptoms and social function. CONCLUSIONS CBT-HA is a highly long-term effective treatment for pathological health anxiety with long-term benefits. Standard care for health anxiety in medical clinics promotes depression. Nurse therapists are effective practitioners.
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Affiliation(s)
- P Tyrer
- Centre for Mental Health, Faculty of Medicine, Imperial College, London, UK
| | - D Wang
- Department of Statistics, Liverpool School of Tropical Medicine, Liverpool, UK
| | - M Crawford
- Centre for Mental Health, Faculty of Medicine, Imperial College, London, UK
| | - S Dupont
- Central Northwest London Foundation NHS Trust, London, UK
| | - S Cooper
- Centre for Mental Health, Faculty of Medicine, Imperial College, London, UK
| | - S Nourmand
- Centre for Mental Health, Faculty of Medicine, Imperial College, London, UK
| | - V Lazarevic
- Centre for Mental Health, Faculty of Medicine, Imperial College, London, UK
| | - A Philip
- South London and Maudsley NHS Foundation Trust, London, UK
| | - H Tyrer
- Centre for Mental Health, Faculty of Medicine, Imperial College, London, UK
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Pocaterra A, Scattolin G, Romani P, Ament C, Ribback S, Chen X, Evert M, Calvisi DF, Dupont S. Fascin1 empowers YAP mechanotransduction and promotes cholangiocarcinoma development. Commun Biol 2021; 4:763. [PMID: 34155338 PMCID: PMC8217270 DOI: 10.1038/s42003-021-02286-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 09/04/2020] [Accepted: 06/01/2021] [Indexed: 12/14/2022] Open
Abstract
Mechanical forces control cell behavior, including cancer progression. Cells sense forces through actomyosin to activate YAP. However, the regulators of F-actin dynamics playing relevant roles during mechanostransduction in vitro and in vivo remain poorly characterized. Here we identify the Fascin1 F-actin bundling protein as a factor that sustains YAP activation in response to ECM mechanical cues. This is conserved in the mouse liver, where Fascin1 regulates YAP-dependent phenotypes, and in human cholangiocarcinoma cell lines. Moreover, this is relevant for liver tumorigenesis, because Fascin1 is required in the AKT/NICD cholangiocarcinogenesis model and it is sufficient, together with AKT, to induce cholangiocellular lesions in mice, recapitulating genetic YAP requirements. In support of these findings, Fascin1 expression in human intrahepatic cholangiocarcinomas strongly correlates with poor patient prognosis. We propose that Fascin1 represents a pro-oncogenic mechanism that can be exploited during intrahepatic cholangiocarcinoma development to overcome a mechanical tumor-suppressive environment.
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Affiliation(s)
- Arianna Pocaterra
- Department of Molecular Medicine, University of Padua Medical School, Padua, Italy
| | - Gloria Scattolin
- Department of Molecular Medicine, University of Padua Medical School, Padua, Italy
| | - Patrizia Romani
- Department of Molecular Medicine, University of Padua Medical School, Padua, Italy
| | - Cindy Ament
- Institute of Pathology, University of Regensburg, Regensburg, Germany
| | - Silvia Ribback
- Institute of Pathology, University of Greifswald, Greifswald, Germany
| | - Xin Chen
- Department of Bioengineering and Therapeutic Sciences and Liver Center, University of California, San Francisco, California, USA
| | - Matthias Evert
- Institute of Pathology, University of Greifswald, Greifswald, Germany
| | - Diego F Calvisi
- Institute of Pathology, University of Greifswald, Greifswald, Germany
| | - Sirio Dupont
- Department of Molecular Medicine, University of Padua Medical School, Padua, Italy.
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22
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Abou Khalil Y, Azar Y, El Bitar S, Lebel M, Deschildre C, Ghaleb Y, Dupont S, Guillas I, Le Goff W, Le Goff C, Boileau C, Varret M, Abifadel M, Michel J, El Khoury P. PCSK9 in the development of human atherosclerosis. Archives of Cardiovascular Diseases Supplements 2021. [DOI: 10.1016/j.acvdsp.2021.04.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Zangrossi M, Romani P, Chakravarty P, Ratcliffe CD, Hooper S, Dori M, Forcato M, Bicciato S, Dupont S, Sahai E, Montagner M. EphB6 Regulates TFEB-Lysosomal Pathway and Survival of Disseminated Indolent Breast Cancer Cells. Cancers (Basel) 2021; 13:1079. [PMID: 33802447 PMCID: PMC7959459 DOI: 10.3390/cancers13051079] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 02/20/2021] [Accepted: 02/24/2021] [Indexed: 12/20/2022] Open
Abstract
Late relapse of disseminated cancer cells is a common feature of breast and prostate tumors. Several intrinsic and extrinsic factors have been shown to affect quiescence and reawakening of disseminated dormant cancer cells (DDCCs); however, the signals and processes sustaining the survival of DDCCs in a foreign environment are still poorly understood. We have recently shown that crosstalk with lung epithelial cells promotes survival of DDCCs of estrogen receptor-positive (ER+) breast tumors. By using a lung organotypic system and in vivo dissemination assays, here we show that the TFEB-lysosomal axis is activated in DDCCs and that it is modulated by the pro-survival ephrin receptor EphB6. TFEB lysosomal direct targets are enriched in DDCCs in vivo and correlate with relapse in ER+ breast cancer patients. Direct coculture of DDCCs with alveolar type I-like lung epithelial cells and dissemination in the lung drive lysosomal accumulation and EphB6 induction. EphB6 contributes to survival, TFEB transcriptional activity, and lysosome formation in DDCCs in vitro and in vivo. Furthermore, signaling from EphB6 promotes the proliferation of surrounding lung parenchymal cells in vivo. Our data provide evidence that EphB6 is a key factor in the crosstalk between disseminated dormant cancer cells and the lung parenchyma and that the TFEB-lysosomal pathway plays an important role in the persistence of DDCCs.
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Affiliation(s)
- Manuela Zangrossi
- Department of Molecular Medicine, University of Padua, Viale G. Colombo, 3, 35126 Padua, Italy; (M.Z.); (P.R.); (S.D.)
| | - Patrizia Romani
- Department of Molecular Medicine, University of Padua, Viale G. Colombo, 3, 35126 Padua, Italy; (M.Z.); (P.R.); (S.D.)
| | - Probir Chakravarty
- Bioinformatics Platform, Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK;
| | - Colin D.H. Ratcliffe
- Tumor Cell Biology Lab, Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK; (C.D.H.R.); (S.H.)
| | - Steven Hooper
- Tumor Cell Biology Lab, Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK; (C.D.H.R.); (S.H.)
| | - Martina Dori
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Giuseppe Campi, 287, 41125 Modena, Italy; (M.D.); (M.F.); (S.B.)
| | - Mattia Forcato
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Giuseppe Campi, 287, 41125 Modena, Italy; (M.D.); (M.F.); (S.B.)
| | - Silvio Bicciato
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Giuseppe Campi, 287, 41125 Modena, Italy; (M.D.); (M.F.); (S.B.)
| | - Sirio Dupont
- Department of Molecular Medicine, University of Padua, Viale G. Colombo, 3, 35126 Padua, Italy; (M.Z.); (P.R.); (S.D.)
| | - Erik Sahai
- Tumor Cell Biology Lab, Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK; (C.D.H.R.); (S.H.)
| | - Marco Montagner
- Department of Molecular Medicine, University of Padua, Viale G. Colombo, 3, 35126 Padua, Italy; (M.Z.); (P.R.); (S.D.)
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24
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Abstract
Epilepsy is one of the most common chronic disorders affecting women of childbearing age. Unfortunately, many women with epilepsy (WWE) still report not receiving key information about pregnancy. They obviously need information about epilepsy and pregnancy prior to conception with a particular emphasis on effective birth control (i.e. contraception), necessity to plan pregnancy, antiepileptic drugs optimization, and folate supplementation. The risks associated with use of antiepileptic drugs during pregnancy have to be balanced against fetal and maternal risks associated with uncontrolled seizures. This report reviews evidence-based counseling and management strategies concerning maternal and fetal risks associated with seizures, teratogenic risks associated with antiepileptic drug exposure with a special emphasis on developmental and behavioural outcomes of children exposed to intra utero antiepileptic drugs.
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Affiliation(s)
- S Dupont
- Epilepsy and Rehabilitation Unit, Hôpital de la Pitié-Salpêtrière, AP-HP, Paris, France; Centre de Recherche de l'Institut du Cerveau et de la Moëlle Épinière (ICM), UMPC-UMR 7225 CNRS-UMRS 975 INSERM, Paris, France; Université Paris Sorbonne, Paris, France.
| | - L Vercueil
- EFSN, University Grenoble Alpes, Inserm, U1216, CHU Grenoble Alpes, Grenoble Institut Neurosciences (GIN), 38000 Grenoble, France
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25
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Abstract
Mechanical forces shape cells and tissues during development and adult homeostasis. In addition, they also signal to cells via mechanotransduction pathways to control cell proliferation, differentiation and death. These processes require metabolism of nutrients for both energy generation and biosynthesis of macromolecules. However, how cellular mechanics and metabolism are connected is still poorly understood. Here, we discuss recent evidence indicating how the mechanical cues exerted by the extracellular matrix (ECM), cell-ECM and cell-cell adhesion complexes influence metabolic pathways. Moreover, we explore the energy and metabolic requirements associated with cell mechanics and ECM remodelling, implicating a reciprocal crosstalk between cell mechanics and metabolism.
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Affiliation(s)
- Patrizia Romani
- Department of Molecular Medicine, University of Padua Medical School, Padua, Italy
| | | | - Christian Frezza
- MRC Cancer Unit, University of Cambridge, Hutchison/MRC Research Centre, Cambridge, UK.
| | - Sirio Dupont
- Department of Molecular Medicine, University of Padua Medical School, Padua, Italy.
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26
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Cuhna P, Herlin B, Vassilev K, Kas A, Lehericy S, Worbe Y, Apartis E, Vidailhet M, Dupont S. Movement disorders as a new neurological clinical picture in severe SARS-CoV-2 infection. Eur J Neurol 2020; 27:e88-e90. [PMID: 32786131 PMCID: PMC7436483 DOI: 10.1111/ene.14474] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 08/06/2020] [Indexed: 11/28/2022]
Affiliation(s)
- P Cuhna
- Rehabilitation Unit, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
| | - B Herlin
- Rehabilitation Unit, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
| | - K Vassilev
- Rehabilitation Unit, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
| | - A Kas
- Nuclear Medicine Unit, Pitié-Salpêtrière Hospital, AP-HP, Paris, France.,Université Paris Sorbonne, Paris, France.,Institute of Brain and Spinal Cord, Paris, France
| | - S Lehericy
- Université Paris Sorbonne, Paris, France.,Institute of Brain and Spinal Cord, Paris, France.,Neuroradiology Unit, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
| | - Y Worbe
- Université Paris Sorbonne, Paris, France.,Neurophysiology Unit, Saint Antoine Hospital, AP-HP, Paris, France
| | - E Apartis
- Université Paris Sorbonne, Paris, France.,Institute of Brain and Spinal Cord, Paris, France.,Neurophysiology Unit, Saint Antoine Hospital, AP-HP, Paris, France
| | - M Vidailhet
- Université Paris Sorbonne, Paris, France.,Institute of Brain and Spinal Cord, Paris, France.,Movement Disorders Unit, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
| | - S Dupont
- Rehabilitation Unit, Pitié-Salpêtrière Hospital, AP-HP, Paris, France.,Université Paris Sorbonne, Paris, France.,Institute of Brain and Spinal Cord, Paris, France.,Epilepsy Unit, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
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27
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Outin H, Gueye P, Alvarez V, Auvin S, Clair B, Convers P, Crespel A, Demeret S, Dupont S, Engels JC, Engrand N, Freund Y, Gelisse P, Girot M, Marcoux MO, Navarro V, Rossetti A, Santoli F, Sonneville R, Szurhaj W, Thomas P, Titomanlio L, Villega F, Lefort H, Peigne V. Recommandations Formalisées d’Experts SRLF/SFMU : Prise en charge des états de mal épileptiques en préhospitalier, en structure d’urgence et en réanimation dans les 48 premières heures (A l’exclusion du nouveau-né et du nourrisson). Ann Fr Med Urgence 2020. [DOI: 10.3166/afmu-2020-0232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
La Société de réanimation de langue française et la Société française de médecine d’urgence ont décidé d’élaborer de nouvelles recommandations sur la prise en charge de l’état mal épileptique (EME) avec l’ambition de répondre le plus possible aux nombreuses questions pratiques que soulèvent les EME : diagnostic, enquête étiologique, traitement non spécifique et spécifique. Vingt-cinq experts ont analysé la littérature scientifique et formulé des recommandations selon la méthodologie GRADE. Les experts se sont accordés sur 96 recommandations. Les recommandations avec le niveau de preuve le plus fort ne concernent que l’EME tonico-clonique généralisé (EMTCG) : l’usage des benzodiazépines en première ligne (clonazépam en intraveineux direct ou midazolam en intramusculaire) est recommandé, répété 5 min après la première injection (à l’exception du midazolam) en cas de persistance clinique. En cas de persistance 5 min après cette seconde injection, il est proposé d’administrer la seconde ligne thérapeutique : valproate de sodium, (fos-)phénytoïne, phénobarbital ou lévétiracétam. La persistance avérée de convulsions 30 min après le début de l’administration du traitement de deuxième ligne signe l’EMETCG réfractaire. Il est alors proposé de recourir à un coma thérapeutique au moyen d’un agent anesthésique intraveineux de type midazolam ou propofol. Des recommandations spécifiques à l’enfant et aux autres EME sont aussi énoncées.
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28
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Dupont S, Navarro V. The future of epilepsy. Rev Neurol (Paris) 2020; 176:407. [DOI: 10.1016/j.neurol.2020.04.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 04/24/2020] [Indexed: 11/25/2022]
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29
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Samson S, Moncomble C, Méré M, Vasseur R, Dupont S. Getting older with chronic temporal lobe epilepsy: What memory profile? Rev Neurol (Paris) 2020; 176:439-443. [DOI: 10.1016/j.neurol.2020.04.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 04/01/2020] [Indexed: 10/24/2022]
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30
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Dupont S. Trattamento medico dell’epilessia dell’adulto. Neurologia 2020. [DOI: 10.1016/s1634-7072(20)43686-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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31
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Dupont S, Lokmer A, Corre E, Auguet JC, Petton B, Toulza E, Montagnani C, Tanguy G, Pecqueur D, Salmeron C, Guillou L, Desnues C, La Scola B, Bou Khalil J, de Lorgeril J, Mitta G, Gueguen Y, Escoubas JM. Oyster hemolymph is a complex and dynamic ecosystem hosting bacteria, protists and viruses. Anim Microbiome 2020; 2:12. [PMID: 33499958 PMCID: PMC7807429 DOI: 10.1186/s42523-020-00032-w] [Citation(s) in RCA: 13] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 04/14/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The impact of the microbiota on host fitness has so far mainly been demonstrated for the bacterial microbiome. We know much less about host-associated protist and viral communities, largely due to technical issues. However, all microorganisms within a microbiome potentially interact with each other as well as with the host and the environment, therefore likely affecting the host health. RESULTS We set out to explore how environmental and host factors shape the composition and diversity of bacterial, protist and viral microbial communities in the Pacific oyster hemolymph, both in health and disease. To do so, five oyster families differing in susceptibility to the Pacific oyster mortality syndrome were reared in hatchery and transplanted into a natural environment either before or during a disease outbreak. Using metabarcoding and shotgun metagenomics, we demonstrate that hemolymph can be considered as an ecological niche hosting bacterial, protist and viral communities, each of them shaped by different factors and distinct from the corresponding communities in the surrounding seawater. Overall, we found that hemolymph microbiota is more strongly shaped by the environment than by host genetic background. Co-occurrence network analyses suggest a disruption of the microbial network after transplantation into natural environment during both non-infectious and infectious periods. Whereas we could not identify a common microbial community signature for healthy animals, OsHV-1 μVar virus dominated the hemolymph virome during the disease outbreak, without significant modifications of other microbiota components. CONCLUSION Our study shows that oyster hemolymph is a complex ecosystem containing diverse bacteria, protists and viruses, whose composition and dynamics are primarily determined by the environment. However, all of these are also shaped by oyster genetic backgrounds, indicating they indeed interact with the oyster host and are therefore not only of transient character. Although it seems that the three microbiome components respond independently to environmental conditions, better characterization of hemolymph-associated viruses could change this picture.
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Affiliation(s)
- S Dupont
- IHPE, Univ. Montpellier, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan Via Domitia, 34095, Montpellier, France
| | - A Lokmer
- Coastal Ecology, Wadden Sea Station Sylt, Alfred Wegener Institute - Helmholtz Centre for Polar and Marine Research, List auf Sylt, Germany.,Current affiliation UMR 7206 Eco-anthropologie et Ethnologie, CNRS - MNHN Univ. Paris Diderot Sorbonne Paris Cité, Paris, France
| | - E Corre
- Sorbonne Université, CNRS, FR2424 ABiMS (Analysis and Bioanalysis for Marine Sciences), Station Biologique de Roscoff SBR, 29680, Roscoff, France
| | - J-C Auguet
- MARBEC, Université Montpellier, CNRS, IFREMER, IRD, CC093, place Eugène Bataillon, 34095, Montpellier, France
| | - B Petton
- Ifremer, LEMAR UMR 6539, 11 presqu'île du Vivier, 29840, Argenton-en-Landunvez, France
| | - E Toulza
- IHPE, Univ. Montpellier, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan Via Domitia, 34095, Montpellier, France
| | - C Montagnani
- IHPE, Univ. Montpellier, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan Via Domitia, 34095, Montpellier, France
| | - G Tanguy
- Sorbonne Université, CNRS, FR2424, Genomer, Station Biologique de Roscoff SBR, 29680, Roscoff, France
| | - D Pecqueur
- Observatoire Océanologique de Banyuls sur Mer, FR 3724, BioPIC, CNRS/SU, Avenue Pierre Fabre, 66650, Banyuls-sur-Mer, France
| | - C Salmeron
- Observatoire Océanologique de Banyuls sur Mer, FR 3724, BioPIC, CNRS/SU, Avenue Pierre Fabre, 66650, Banyuls-sur-Mer, France
| | - L Guillou
- Sorbonne Université, CNRS, UMR7144 Adaptation et Diversité en Milieu Marin, Ecology of Marine Plankton (ECOMAP), Station Biologique de Roscoff SBR, 29680, Roscoff, France
| | - C Desnues
- Aix-Marseille Université, IRD 257, Assistance-Publique des Hôpitaux de Marseille, UMR Microbes, Evolution, Phylogeny and Infections (MEPHI), IHU Méditerranée Infection, 13005, Marseille, France.,Aix-Marseille Université, Université de Toulon, CNRS, IRD, Mediterranean Institute of Oceanography, UM 110, 13288, Marseille, France
| | - B La Scola
- Microbes, Evolution, Phylogeny and Infection (MEΦI), Aix-Marseille Université UM63, Institut de Recherche pour le Développement IRD 198, Assistance Publique - Hôpitaux de Marseille (AP-HM), Marseille, France.,Institut Hospitalo-Universitaire (IHU) - Méditerranée Infection, Marseille, France
| | - J Bou Khalil
- Institut Hospitalo-Universitaire (IHU) - Méditerranée Infection, Marseille, France
| | - J de Lorgeril
- IHPE, Univ. Montpellier, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan Via Domitia, 34095, Montpellier, France
| | - G Mitta
- IHPE, Univ. Montpellier, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan Via Domitia, 34095, Montpellier, France
| | - Y Gueguen
- IHPE, Univ. Montpellier, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan Via Domitia, 34095, Montpellier, France
| | - J-M Escoubas
- IHPE, Univ. Montpellier, CNRS, Ifremer, Univ. Montpellier, Univ. Perpignan Via Domitia, 34095, Montpellier, France.
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32
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Abstract
YAP and TAZ proteins are transcriptional coactivators encoded by paralogous genes, which shuttle between the cytoplasm and the nucleus in response to multiple inputs, including the Hippo pathway. In the nucleus, they pair with DNA-binding factors of the TEAD family to regulate gene expression. Nuclear YAP/TAZ promote cell proliferation, organ overgrowth, survival to stress and dedifferentiation of post-mitotic cells into their respective tissue progenitors. YAP/TAZ are required for growth of embryonic tissues, wound healing and organ regeneration, where they are activated by cell-intrinsic and extrinsic cues. Surprisingly, this activity is dispensable in many adult self-renewing tissues, where YAP/TAZ are constantly kept in check. YAP/TAZ lay at the center of a complex regulatory network including cell-autonomous factors but also cell- and tissue-level structural features such as the mechanical properties of the cell microenvironment, the establishment of cell-cell junctions and of basolateral tissue polarity. Enhanced levels and activity of YAP/TAZ are observed in many cancers, where they sustain tumor growth, drug resistance and malignancy. In this Cell Science at a Glance article and the accompanying poster, we review the biological functions of YAP/TAZ and their regulatory mechanisms, and highlight their position at the center of a complex signaling network.
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Affiliation(s)
- Arianna Pocaterra
- University of Padova, Department of Molecular Medicine, via Bassi 58/B, 35131 Padova, Italy
| | - Patrizia Romani
- University of Padova, Department of Molecular Medicine, via Bassi 58/B, 35131 Padova, Italy
| | - Sirio Dupont
- University of Padova, Department of Molecular Medicine, via Bassi 58/B, 35131 Padova, Italy
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33
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Abstract
Disseminated metastatic cancer cells represent one of the most relevant causes of disease relapse and associated death for cancer patients, and a therapeutic target of the highest priority. Still, our understanding of how disseminated cancer cells survive in the foreign metastatic environment, and eventually cause metastatic outgrowth, remains rather limited. In this review we focus on the cell microenvironment as a key regulator of cell behavior at the metastatic site, and especially on the mechanical properties of the extracellular matrix and associated integrin signaling. We discuss available evidence pointing to a pervasive role of extracellular matrix (ECM) mechanical properties in regulating cancer cell proliferation and survival after dissemination, and propose that this might represent an important bottleneck for cells invading and establishing into a novel tissue. We point to the known molecular players, how these might contribute to modulate the mechanical properties of the metastatic environment, and the response of cells to these cues. Finally, we propose that emerging knowledge on the physical interaction of disseminated metastatic cells and on the downstream mechanotransduction pathways, including YAP/TAZ (Yes-associated protein-1 and WW-domain transcription activator 1) and MRTFs (Myocardin-related transcription factors), may help to identify novel approaches for therapy.
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Affiliation(s)
- Marco Montagner
- Department of Molecular Medicine, University of Padua, via Bassi 58/B, zip 35121 Padua, Italy
| | - Sirio Dupont
- Department of Molecular Medicine, University of Padua, via Bassi 58/B, zip 35121 Padua, Italy
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34
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Costa R, Peruzzo R, Bachmann M, Montà GD, Vicario M, Santinon G, Mattarei A, Moro E, Quintana-Cabrera R, Scorrano L, Zeviani M, Vallese F, Zoratti M, Paradisi C, Argenton F, Brini M, Calì T, Dupont S, Szabò I, Leanza L. Impaired Mitochondrial ATP Production Downregulates Wnt Signaling via ER Stress Induction. Cell Rep 2019; 28:1949-1960.e6. [PMID: 31433973 DOI: 10.1016/j.celrep.2019.07.050] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [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: 10/02/2018] [Revised: 03/01/2019] [Accepted: 07/16/2019] [Indexed: 02/02/2023] Open
Abstract
Wnt signaling affects fundamental development pathways and, if aberrantly activated, promotes the development of cancers. Wnt signaling is modulated by different factors, but whether the mitochondrial energetic state affects Wnt signaling is unknown. Here, we show that sublethal concentrations of different compounds that decrease mitochondrial ATP production specifically downregulate Wnt/β-catenin signaling in vitro in colon cancer cells and in vivo in zebrafish reporter lines. Accordingly, fibroblasts from a GRACILE syndrome patient and a generated zebrafish model lead to reduced Wnt signaling. We identify a mitochondria-Wnt signaling axis whereby a decrease in mitochondrial ATP reduces calcium uptake into the endoplasmic reticulum (ER), leading to endoplasmic reticulum stress and to impaired Wnt signaling. In turn, the recovery of the ATP level or the inhibition of endoplasmic reticulum stress restores Wnt activity. These findings reveal a mechanism that links mitochondrial energetic metabolism to the control of the Wnt pathway that may be beneficial against several pathologies.
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Affiliation(s)
- Roberto Costa
- Department of Biology, University of Padova, Padova, Italy
| | | | | | | | - Mattia Vicario
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Giulia Santinon
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Andrea Mattarei
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Enrico Moro
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Rubén Quintana-Cabrera
- Department of Biology, University of Padova, Padova, Italy; Venetian Institute of Molecular Medicine, Padova, Padova, Italy
| | - Luca Scorrano
- Department of Biology, University of Padova, Padova, Italy; Venetian Institute of Molecular Medicine, Padova, Padova, Italy
| | - Massimo Zeviani
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, UK
| | - Francesca Vallese
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Mario Zoratti
- Department of Biomedical Sciences, University of Padova, Padova, Italy; CNR Institute of Neuroscience, Padova, Italy
| | - Cristina Paradisi
- Department of Chemical Sciences, University of Padova, Padova, Italy
| | | | - Marisa Brini
- Department of Biology, University of Padova, Padova, Italy
| | - Tito Calì
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Sirio Dupont
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Ildikò Szabò
- Department of Biology, University of Padova, Padova, Italy; CNR Institute of Neuroscience, Padova, Italy.
| | - Luigi Leanza
- Department of Biology, University of Padova, Padova, Italy.
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35
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Pocaterra A, Santinon G, Romani P, Brian I, Dimitracopoulos A, Ghisleni A, Carnicer-Lombarte A, Forcato M, Braghetta P, Montagner M, Galuppini F, Aragona M, Pennelli G, Bicciato S, Gauthier N, Franze K, Dupont S. F-actin dynamics regulates mammalian organ growth and cell fate maintenance. J Hepatol 2019; 71:130-142. [PMID: 30878582 DOI: 10.1016/j.jhep.2019.02.022] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 01/31/2019] [Accepted: 02/22/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS In vitro, cell function can be potently regulated by the mechanical properties of cells and of their microenvironment. Cells measure these features by developing forces via their actomyosin cytoskeleton, and respond accordingly by regulating intracellular pathways, including the transcriptional coactivators YAP/TAZ. Whether mechanical cues are relevant for in vivo regulation of adult organ homeostasis, and whether this occurs through YAP/TAZ, remains largely unaddressed. METHODS We developed Capzb conditional knockout mice and obtained primary fibroblasts to characterize the role of CAPZ in vitro. In vivo functional analyses were carried out by inducing Capzb inactivation in adult hepatocytes, manipulating YAP/Hippo activity by hydrodynamic tail vein injections, and treating mice with the ROCK inhibitor, fasudil. RESULTS We found that the F-actin capping protein CAPZ restrains actomyosin contractility: Capzb inactivation alters stress fiber and focal adhesion dynamics leading to enhanced myosin activity, increased traction forces, and increased liver stiffness. In vitro, this rescues YAP from inhibition by a small cellular geometry; in vivo, it induces YAP activation in parallel to the Hippo pathway, causing extensive hepatocyte proliferation and leading to striking organ overgrowth. Moreover, Capzb is required for the maintenance of the differentiated hepatocyte state, for metabolic zonation, and for gluconeogenesis. In keeping with changes in tissue mechanics, inhibition of the contractility regulator ROCK, or deletion of the Yap1 mechanotransducer, reverse the phenotypes emerging in Capzb-null livers. CONCLUSIONS These results indicate a previously unsuspected role for CAPZ in tuning the mechanical properties of cells and tissues, which is required in hepatocytes for the maintenance of the differentiated state and to regulate organ size. More generally, it indicates for the first time that mechanotransduction has a physiological role in maintaining liver homeostasis in mammals. LAY SUMMARY The mechanical properties of cells and tissues (i.e. whether they are soft or stiff) are thought to be important regulators of cell behavior. Herein, we found that inactivation of the protein CAPZ alters the mechanical properties of cells and liver tissues, leading to YAP hyperactivation. In turn, this profoundly alters liver physiology, causing organ overgrowth, defects in liver cell differentiation and metabolism. These results reveal a previously uncharacterized role for mechanical signals in the maintenance of adult liver homeostasis.
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Affiliation(s)
| | - Giulia Santinon
- Department of Molecular Medicine DMM, University of Padova, Italy
| | - Patrizia Romani
- Department of Molecular Medicine DMM, University of Padova, Italy
| | - Irene Brian
- Department of Molecular Medicine DMM, University of Padova, Italy
| | | | - Andrea Ghisleni
- Institute FIRC (Italian Foundation for Cancer Research) of Molecular Oncology (IFOM Institute FIRC for Molecular Oncology), Milan, Italy
| | | | - Mattia Forcato
- Department of Life Sciences, University of Modena and Reggio Emilia, Italy
| | - Paola Braghetta
- Department of Molecular Medicine DMM, University of Padova, Italy
| | - Marco Montagner
- Department of Molecular Medicine DMM, University of Padova, Italy
| | | | | | | | - Silvio Bicciato
- Department of Life Sciences, University of Modena and Reggio Emilia, Italy
| | - Nils Gauthier
- Institute FIRC (Italian Foundation for Cancer Research) of Molecular Oncology (IFOM Institute FIRC for Molecular Oncology), Milan, Italy
| | - Kristian Franze
- Department of Physiology Development and Neuroscience, University of Cambridge, UK
| | - Sirio Dupont
- Department of Molecular Medicine DMM, University of Padova, Italy.
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Gautier A, Renard R, Dupont S, Journé C, Doblas S, Franck G, Michel J. Red blood cells collision with the wall in human coronary arteries promotes oxidative stress in early stage atheroma. Archives of Cardiovascular Diseases Supplements 2019. [DOI: 10.1016/j.acvdsp.2019.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Rheims S, Dupont S, Derambure P. Epilepsy: Current knowledge and new perspectives. Rev Neurol (Paris) 2019; 175:133-134. [PMID: 30879489 DOI: 10.1016/j.neurol.2019.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- S Rheims
- Department of Functional Neurology and Epileptology, University of Lyon, Hospices Civils de Lyon, 69500 Lyon, France; Inserm U1028, CNRS UMR5292, Lyon's Neurosciences Research Center, Lyon, France.
| | - S Dupont
- Epileptology Unit, Groupe hospitalier Pitié-Salpêtrière, Assistance publique-hôpitaux de Paris, Paris, France
| | - P Derambure
- EA 1046, Department of Clinical Neurophysiology, Lille University Medical Center, University of Lille 2, France
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Romani P, Brian I, Santinon G, Pocaterra A, Audano M, Pedretti S, Mathieu S, Forcato M, Bicciato S, Manneville JB, Mitro N, Dupont S. Extracellular matrix mechanical cues regulate lipid metabolism through Lipin-1 and SREBP. Nat Cell Biol 2019; 21:338-347. [DOI: 10.1038/s41556-018-0270-5] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 12/20/2018] [Indexed: 12/15/2022]
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Noël A, Vastrade C, Dupont S, de Barsy M, Huang TD, Van Maerken T, Leroux-Roels I, Delaere B, Melly L, Rondelet B, Dransart C, Dincq AS, Michaux I, Bogaerts P, Glupczynski Y. Nosocomial outbreak of extended-spectrum β-lactamase-producing Enterobacter cloacae among cardiothoracic surgical patients: causes and consequences. J Hosp Infect 2019; 102:54-60. [PMID: 30630000 DOI: 10.1016/j.jhin.2019.01.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 10/14/2018] [Accepted: 01/02/2019] [Indexed: 10/27/2022]
Abstract
BACKGROUND Enterobacteriaceae are recognized as leading pathogens of healthcare-associated infections. AIM To report the investigation of a nosocomial outbreak of extended-spectrum β-lactamase-producing Enterobacter cloacae affecting cardiothoracic surgery patients in a Belgian academic hospital. METHODS Cases were defined based on epidemiological and microbiological investigations, including molecular typing using repetitive element-based polymerase chain reaction and multi-locus sequence typing. Case-control studies followed by field evaluations allowed the identification of a possible reservoir, and the retrospective assessment of human and financial consequences. FINDINGS Over a three-month period, 42 patients were infected or colonized by CTX-M-15-producing E. cloacae strains that belonged to the same clonal lineage. Acquisition mainly occurred in the intensive care unit (N = 23) and in the cardiothoracic surgery ward (N = 16). All but one patient had, prior to acquisition, undergone a cardiothoracic surgical procedure, monitored by the same transoesophageal echocardiography (TOE) probe in the operating room. Despite negative microbiological culture results, the exclusion of the suspected probe resulted in rapid termination of the outbreak. Overall, the outbreak was associated with a high mortality rate among infected patients (40%) as well as significant costs (€266,550). CONCLUSION The outbreak was indirectly shown to be associated with the contamination of a manually disinfected TOE probe used per-operatively during cardiothoracic surgery procedures, because withdrawal of the putative device led to rapid termination of the outbreak.
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Affiliation(s)
- A Noël
- Infection Control Unit, CHU UCL Namur, Yvoir, Belgium.
| | - C Vastrade
- Infection Control Unit, CHU UCL Namur, Yvoir, Belgium
| | - S Dupont
- Infection Control Unit, CHU UCL Namur, Yvoir, Belgium
| | - M de Barsy
- National Reference Centre for Monitoring Antimicrobial Resistance in Gram-Negative Bacteria, CHU UCL Namur, Yvoir, Belgium
| | - T D Huang
- National Reference Centre for Monitoring Antimicrobial Resistance in Gram-Negative Bacteria, CHU UCL Namur, Yvoir, Belgium
| | - T Van Maerken
- Infection Control Unit, Ghent University Hospital, Ghent, Belgium
| | - I Leroux-Roels
- Infection Control Unit, Ghent University Hospital, Ghent, Belgium
| | - B Delaere
- Infectious Diseases Unit, Internal Medicine Department, CHU UCL Namur, Yvoir, Belgium
| | - L Melly
- Cardiovascular, Thoracic Surgery and Lung Transplantation Department, CHU UCL Namur, Yvoir, Belgium
| | - B Rondelet
- Cardiovascular, Thoracic Surgery and Lung Transplantation Department, CHU UCL Namur, Yvoir, Belgium
| | - C Dransart
- Anesthesiology Department, CHU UCL Namur, Yvoir, Belgium
| | - A S Dincq
- Anesthesiology Department, CHU UCL Namur, Yvoir, Belgium
| | - I Michaux
- Intensive Care Unit Department, CHU UCL Namur, Yvoir, Belgium
| | - P Bogaerts
- National Reference Centre for Monitoring Antimicrobial Resistance in Gram-Negative Bacteria, CHU UCL Namur, Yvoir, Belgium
| | - Y Glupczynski
- Infection Control Unit, CHU UCL Namur, Yvoir, Belgium; National Reference Centre for Monitoring Antimicrobial Resistance in Gram-Negative Bacteria, CHU UCL Namur, Yvoir, Belgium
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Abstract
YAP/TAZ activity is regulated by a complex network of signals that include the Hippo pathway, cell polarity complexes, and signaling receptors of the RTK, GPCR, and WNT pathways and by a seamlessly expanding number of intracellular cues including energy and mevalonate metabolism. Among these inputs, we here concentrate on mechanical cues embedded in the extracellular matrix (ECM) microenvironment, which are key regulators of YAP/TAZ activity. We review the techniques that have been used to study mechano-regulation of YAP/TAZ, including conceptual and practical considerations on how these experiments should be designed and controlled. Finally, we briefly review the most appropriate techniques to monitor YAP/TAZ activity in these experiments and their significance to study the mechanisms linking YAP/TAZ to mechanical cues.
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Affiliation(s)
- Sirio Dupont
- Department of Molecular Medicine, School of Medicine, University of Padova, Padova, Italy.
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Abstract
This chapter describes the luciferase assays that are available to monitor YAP/TAZ activity in cell lines and to study their regulation, including the choice for the normalizer, a description of the main YAP-/TAZ-responsive luciferase reporters used so far by the community, and technical notes and experimental considerations on the most appropriate positive controls. Some specific examples are provided to use luciferase assays as the basis to distinguish between Hippo-mediated and phosphorylation-mediated regulatory events and regulatory events that regulate YAP/TAZ independent of these inputs. Finally, typical experimental protocols are outlined briefly for an easier setup of YAP/TAZ luciferase assays.
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Affiliation(s)
- Sirio Dupont
- Department of Molecular Medicine, School of Medicine, University of Padova, Padova, Italy.
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Pajusalu L, Dupont S, Lainela S, Martin G. Ocean acidification research in Estonia: challenges and opportunities. Proc Estonian Acad Sci 2019. [DOI: 10.3176/proc.2019.1.05] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Medeiros F, Correia R, Dupont S, Beney L, Pedrini M. Curcumin and fisetin internalization into Saccharomyces cerevisiae
cells via osmoporation: impact of multiple osmotic treatments on the process efficiency. Lett Appl Microbiol 2018; 67:363-369. [DOI: 10.1111/lam.13045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 06/13/2018] [Accepted: 07/03/2018] [Indexed: 11/30/2022]
Affiliation(s)
- F.G.M. Medeiros
- Bioprocess Laboratory; Chemical Engineering Department; Federal University of Rio Grande do Norte; Natal Brazil
| | - R.T.P. Correia
- Laboratory of Bioactive Compounds; Chemical Engineering Department; Federal University of Rio Grande do Norte; Natal Brazil
| | - S. Dupont
- UMR Procédés Alimentaires et Microbiologiques (PAM); Univ. de Bourgogne Franche-Comté/AgroSup Dijon; Dijon France
| | - L. Beney
- UMR Procédés Alimentaires et Microbiologiques (PAM); Univ. de Bourgogne Franche-Comté/AgroSup Dijon; Dijon France
| | - M.R.S. Pedrini
- Bioprocess Laboratory; Chemical Engineering Department; Federal University of Rio Grande do Norte; Natal Brazil
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Astone M, Lai JKH, Dupont S, Stainier DYR, Argenton F, Vettori A. Zebrafish mutants and TEAD reporters reveal essential functions for Yap and Taz in posterior cardinal vein development. Sci Rep 2018; 8:10189. [PMID: 29976931 PMCID: PMC6033906 DOI: 10.1038/s41598-018-27657-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [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: 01/15/2018] [Accepted: 06/05/2018] [Indexed: 01/07/2023] Open
Abstract
As effectors of the Hippo signaling cascade, YAP1 and TAZ are transcriptional regulators playing important roles in development, tissue homeostasis and cancer. A number of different cues, including mechanotransduction of extracellular stimuli, adhesion molecules, oncogenic signaling and metabolism modulate YAP1/TAZ nucleo-cytoplasmic shuttling. In the nucleus, YAP1/TAZ tether with the DNA binding proteins TEADs, to activate the expression of target genes that regulate proliferation, migration, cell plasticity, and cell fate. Based on responsive elements present in the human and zebrafish promoters of the YAP1/TAZ target gene CTGF, we established zebrafish fluorescent transgenic reporter lines of Yap1/Taz activity. These reporter lines provide an in vivo view of Yap1/Taz activity during development and adulthood at the whole organism level. Transgene expression was detected in many larval tissues including the otic vesicles, heart, pharyngeal arches, muscles and brain and is prominent in endothelial cells. Analysis of vascular development in yap1/taz zebrafish mutants revealed specific defects in posterior cardinal vein (PCV) formation, with altered expression of arterial/venous markers. The overactivation of Yap1/Taz in endothelial cells was sufficient to promote an aberrant vessel sprouting phenotype. Our findings confirm and extend the emerging role of Yap1/Taz in vascular development including angiogenesis.
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MESH Headings
- Animals
- Animals, Genetically Modified
- Connective Tissue Growth Factor/genetics
- Embryo, Nonmammalian
- Endothelial Cells/metabolism
- Endothelium, Vascular/cytology
- Endothelium, Vascular/metabolism
- Gene Expression Regulation, Developmental
- Genes, Reporter/genetics
- Intracellular Signaling Peptides and Proteins/genetics
- Intracellular Signaling Peptides and Proteins/metabolism
- Luciferases/chemistry
- Luciferases/genetics
- Microscopy, Confocal
- Microscopy, Fluorescence
- Mutation
- Neovascularization, Physiologic/genetics
- Promoter Regions, Genetic/genetics
- Trans-Activators/genetics
- Trans-Activators/metabolism
- Transcriptional Coactivator with PDZ-Binding Motif Proteins
- Transgenes/genetics
- Veins/cytology
- Veins/growth & development
- YAP-Signaling Proteins
- Zebrafish
- Zebrafish Proteins/genetics
- Zebrafish Proteins/metabolism
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Affiliation(s)
- Matteo Astone
- University of Padova, Department of Biology, Padova, Italy
| | | | - Sirio Dupont
- University of Padova, Department of Molecular Medicine, Padova, Italy
| | | | | | - Andrea Vettori
- University of Padova, Department of Biology, Padova, Italy.
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45
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Santinon G, Brian I, Pocaterra A, Romani P, Franzolin E, Rampazzo C, Bicciato S, Dupont S. dNTP metabolism links mechanical cues and YAP/TAZ to cell growth and oncogene-induced senescence. EMBO J 2018; 37:embj.201797780. [PMID: 29650681 DOI: 10.15252/embj.201797780] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [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: 07/14/2017] [Revised: 03/13/2018] [Accepted: 03/15/2018] [Indexed: 12/20/2022] Open
Abstract
YAP/TAZ, downstream transducers of the Hippo pathway, are powerful regulators of cancer growth. How these factors control proliferation remains poorly defined. Here, we found that YAP/TAZ directly regulate expression of key enzymes involved in deoxynucleotide biosynthesis and maintain dNTP precursor pools in human cancer cells. Regulation of deoxynucleotide metabolism is required for YAP-induced cell growth and underlies the resistance of YAP-addicted cells to chemotherapeutics targeting dNTP synthesis. During RAS-induced senescence, YAP/TAZ bypass RAS-mediated inhibition of nucleotide metabolism and control senescence. Endogenous YAP/TAZ targets and signatures are inhibited by RAS/MEK1 during senescence, and depletion of YAP/TAZ is sufficient to cause senescence-associated phenotypes, suggesting a role for YAP/TAZ in suppression of senescence. Finally, mechanical cues, such as ECM stiffness and cell geometry, regulate senescence in a YAP-dependent manner. This study indicates that YAP/TAZ couples cell proliferation with a metabolism suited for DNA replication and facilitates escape from oncogene-induced senescence. We speculate that this activity might be relevant during the initial phases of tumour progression or during experimental stem cell reprogramming induced by YAP.
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Affiliation(s)
- Giulia Santinon
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Irene Brian
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Arianna Pocaterra
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Patrizia Romani
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | | | | | - Silvio Bicciato
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Sirio Dupont
- Department of Molecular Medicine, University of Padova, Padova, Italy
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46
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Nguyen-Michel VH, Dupont S, Thivard L, Mathon B, Lambrecq V, Hasboun D, Navarro V, Habert MO, Clemenceau S, Baulac M, Adam C. Seizure freedom after intracranial electrode implantation in pharmacoresistant epilepsy. Eur J Neurol 2017; 25:e7-e8. [PMID: 29271584 DOI: 10.1111/ene.13487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 10/16/2017] [Indexed: 11/30/2022]
Affiliation(s)
| | - S Dupont
- Epileptology Unit, AP-HP, Hôpital La Pitié-Salpêtrière, Paris.,Rehabilitation Unit, AP-HP, Hôpital La Pitié-Salpêtrière, Paris.,Sorbonne Universités, UPMC Université Paris 06, Paris.,ICM-IHU, INSERM, CNRS, Paris
| | - L Thivard
- Rehabilitation Unit, AP-HP, Hôpital La Pitié-Salpêtrière, Paris
| | - B Mathon
- Sorbonne Universités, UPMC Université Paris 06, Paris.,ICM-IHU, INSERM, CNRS, Paris.,Neurosurgery Unit, AP-HP, Hôpital La Pitié-Salpêtrière, Paris
| | - V Lambrecq
- Epileptology Unit, AP-HP, Hôpital La Pitié-Salpêtrière, Paris.,Sorbonne Universités, UPMC Université Paris 06, Paris
| | - D Hasboun
- Sorbonne Universités, UPMC Université Paris 06, Paris.,Neuroradiology Unit, AP-HP, Hôpital La Pitié-Salpêtrière, Paris
| | - V Navarro
- Epileptology Unit, AP-HP, Hôpital La Pitié-Salpêtrière, Paris.,Sorbonne Universités, UPMC Université Paris 06, Paris.,ICM-IHU, INSERM, CNRS, Paris
| | - M-O Habert
- Sorbonne Universités, UPMC Université Paris 06, Paris.,ICM-IHU, INSERM, CNRS, Paris.,Nuclear Medicine Department, AP-HP, Hôpital La Pitié-Salpêtrière, Paris, France
| | - S Clemenceau
- Neurosurgery Unit, AP-HP, Hôpital La Pitié-Salpêtrière, Paris
| | - M Baulac
- Epileptology Unit, AP-HP, Hôpital La Pitié-Salpêtrière, Paris
| | - C Adam
- Epileptology Unit, AP-HP, Hôpital La Pitié-Salpêtrière, Paris
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Mercier C, Lossouarn J, Nesbø CL, Haverkamp THA, Baudoux AC, Jebbar M, Bienvenu N, Thiroux S, Dupont S, Geslin C. Two viruses, MCV1 and MCV2, which infect Marinitoga
bacteria isolated from deep-sea hydrothermal vents: functional and genomic analysis. Environ Microbiol 2017; 20:577-587. [DOI: 10.1111/1462-2920.13967] [Citation(s) in RCA: 14] [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: 06/08/2017] [Revised: 09/25/2017] [Accepted: 10/19/2017] [Indexed: 11/27/2022]
Affiliation(s)
- C. Mercier
- Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM) - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes, rue Dumont d'Urville; F-29280 Plouzané France
- CNRS, IUEM - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), rue Dumont d'Urville; F-29280 Plouzané France
- Ifremer, UMR 6197 Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), Technopôle de la Pointe du diable; F-29280 Plouzané France
| | - J. Lossouarn
- Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM) - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes, rue Dumont d'Urville; F-29280 Plouzané France
- CNRS, IUEM - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), rue Dumont d'Urville; F-29280 Plouzané France
- Ifremer, UMR 6197 Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), Technopôle de la Pointe du diable; F-29280 Plouzané France
| | - C. L. Nesbø
- Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biology; University of Oslo; Oslo 0316 Norway
- Department of Biological Sciences; University of Alberta; Edmonton AB T6G2R3 Canada
| | - T. H. A. Haverkamp
- Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biology; University of Oslo; Oslo 0316 Norway
| | - A. C. Baudoux
- Sorbonne Universités, UPMC Université Paris 06, UMR 7144, Equipe DIPO, Station Biologique de Roscoff; F-29680 Roscoff France
- CNRS, UMR 7144, Adaptation et Diversité en Milieu Marin, Station Biologique de Roscoff; F-29680 Roscoff France
| | - M. Jebbar
- Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM) - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes, rue Dumont d'Urville; F-29280 Plouzané France
- CNRS, IUEM - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), rue Dumont d'Urville; F-29280 Plouzané France
- Ifremer, UMR 6197 Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), Technopôle de la Pointe du diable; F-29280 Plouzané France
| | - N. Bienvenu
- Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM) - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes, rue Dumont d'Urville; F-29280 Plouzané France
- CNRS, IUEM - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), rue Dumont d'Urville; F-29280 Plouzané France
- Ifremer, UMR 6197 Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), Technopôle de la Pointe du diable; F-29280 Plouzané France
| | - S. Thiroux
- Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM) - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes, rue Dumont d'Urville; F-29280 Plouzané France
- CNRS, IUEM - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), rue Dumont d'Urville; F-29280 Plouzané France
- Ifremer, UMR 6197 Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), Technopôle de la Pointe du diable; F-29280 Plouzané France
| | - S. Dupont
- Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM) - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes, rue Dumont d'Urville; F-29280 Plouzané France
- CNRS, IUEM - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), rue Dumont d'Urville; F-29280 Plouzané France
- Ifremer, UMR 6197 Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), Technopôle de la Pointe du diable; F-29280 Plouzané France
| | - C. Geslin
- Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM) - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes, rue Dumont d'Urville; F-29280 Plouzané France
- CNRS, IUEM - UMR 6197, Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), rue Dumont d'Urville; F-29280 Plouzané France
- Ifremer, UMR 6197 Laboratoire de Microbiologie des Environnements Extrêmes (LMEE), Technopôle de la Pointe du diable; F-29280 Plouzané France
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48
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Kastelik JC, Dupont S, Yushkov KB, Molchanov VY, Gazalet J. Double acousto-optic deflector system for increased scanning range of laser beams. Ultrasonics 2017; 80:62-65. [PMID: 28500905 DOI: 10.1016/j.ultras.2017.04.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 04/26/2017] [Accepted: 04/26/2017] [Indexed: 06/07/2023]
Abstract
A new laser scanning system is presented based on two wide-band acousto-optic deflectors. The interaction medium is tellurium dioxide. Anisotropic interactions take place under two different tangential phase matching configurations in such a way that the acousto-optic bandwidths add up. We demonstrate the feasibility of such a cascade deflection system for the wavelength of λ=514nm. The total frequency bandwidth is Δf=100MHz, equally distributed between the two acousto-optic deflectors. The total angular scan at the output is Δθ=4.4° leading to 125 resolvable spots for a 1mm truncated Gaussian beam.
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Affiliation(s)
- J-C Kastelik
- Université Lille Nord de France, 59000 Lille, France; Université de Valenciennes et du Hainaut-Cambrésis, IEMN-DOAE, Le Mont Houy, 59313 Valenciennes Cedex 9, France; CNRS, UMR 8520, 59650 Villeneuve d'Ascq, France.
| | - S Dupont
- Université Lille Nord de France, 59000 Lille, France; Université de Valenciennes et du Hainaut-Cambrésis, IEMN-DOAE, Le Mont Houy, 59313 Valenciennes Cedex 9, France; CNRS, UMR 8520, 59650 Villeneuve d'Ascq, France
| | - K B Yushkov
- Acousto-Optical Research Center, National University of Science and Technology "MISIS", 4 Leninsky prospect, 119049 Moscow, Russia
| | - V Ya Molchanov
- Acousto-Optical Research Center, National University of Science and Technology "MISIS", 4 Leninsky prospect, 119049 Moscow, Russia
| | - J Gazalet
- Université Lille Nord de France, 59000 Lille, France; Université de Valenciennes et du Hainaut-Cambrésis, IEMN-DOAE, Le Mont Houy, 59313 Valenciennes Cedex 9, France; CNRS, UMR 8520, 59650 Villeneuve d'Ascq, France
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49
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Dupont S. Epilessie focali strutturali metaboliche o epilessie focali con eziologia identificata. Neurologia 2017. [DOI: 10.1016/s1634-7072(17)85554-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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50
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Hainque E, Blancher A, Mesnage V, Rivaud-Pechoux S, Bertrand A, Dupont S, Navarro V, Roze E, Gourfinkel-An I, Apartis E. A clinical and neurophysiological motor signature of Unverricht-Lundborg disease. Rev Neurol (Paris) 2017; 174:56-65. [PMID: 28688606 DOI: 10.1016/j.neurol.2017.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 04/03/2017] [Accepted: 06/01/2017] [Indexed: 11/17/2022]
Abstract
OBJECTIVES Unverricht-Lundborg disease (ULD) is the most common form of progressive myoclonus epilepsy. Cerebellar dysfunction may appear over time, contributing along with myoclonus to motor disability. The purpose of the present work was to clarify the motor and neurophysiological characteristics of ULD patients. METHODS Nine patients with genetically proven ULD were evaluated clinically (medical history collected from patient charts, the Scale for the Assessment and Rating of Ataxia and Unified Myoclonus Rating Scale). Neurophysiological investigations included EEG, surface polymyography, long-loop C-reflexes, somatosensory evoked potentials, EEG jerk-locked back-averaging (JLBA) and oculomotor recordings. All patients underwent brain MRI. Non-parametric Mann-Whitney tests were used to compare ULD patients' oculomotor parameters with those of a matched group of healthy volunteers (HV). RESULTS Myoclonus was activated by action but was virtually absent at rest and poorly induced by stimuli. Positive myoclonus was multifocal, often rhythmic and of brief duration, with top-down pyramidal temporospatial propagation. Cortical neurophysiology revealed a transient wave preceding myoclonus on EEG JLBA (n=8), enlarged somatosensory evoked potentials (n=7) and positive long-loop C-reflexes at rest (n=5). Compared with HV, ULD patients demonstrated decreased saccadic gain, increased gain dispersion and a higher frequency of hypermetric saccades associated with decreased peak velocity. CONCLUSION A homogeneous motor pattern was delineated that may represent a ULD clinical and neurophysiological signature. Clinical and neurophysiological findings confirmed the pure cortical origin of the permanent myoclonus. Also, oculomotor findings shed new light on ULD pathophysiology by evidencing combined midbrain and cerebellar dysfunction.
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Affiliation(s)
- E Hainque
- Unité de neurophysiologie, département DéPAS, hôpital Saint-Antoine, AP-HP, 184, rue du Faubourg-Saint-Antoine, 75012 Paris, France; Inserm U1127, CNRS UMR7225, institut du cerveau et de la moelle épinière, ICM, Paris Sorbonne universités, UPMC, université de Paris 06, UMR S1127, 47, boulevard de l'hôpital, 75651 Paris cedex 13, France
| | - A Blancher
- Unité de neurophysiologie, département DéPAS, hôpital Saint-Antoine, AP-HP, 184, rue du Faubourg-Saint-Antoine, 75012 Paris, France
| | - V Mesnage
- Service de neurologie, hôpital Saint-Antoine, AP-HP, 184, rue du Faubourg-Saint-Antoine, 75012 Paris, France
| | - S Rivaud-Pechoux
- Inserm U1127, CNRS UMR7225, institut du cerveau et de la moelle épinière, ICM, Paris Sorbonne universités, UPMC, université de Paris 06, UMR S1127, 47, boulevard de l'hôpital, 75651 Paris cedex 13, France
| | - A Bertrand
- Inserm U1127, CNRS UMR7225, institut du cerveau et de la moelle épinière, ICM, Paris Sorbonne universités, UPMC, université de Paris 06, UMR S1127, 47, boulevard de l'hôpital, 75651 Paris cedex 13, France; Service de neuroradiologie diagnostique et fonctionnelle, hôpital Pitié-Salpêtrière, AP-HP, 47, boulevard de l'hôpital, 75651 Paris cedex 13, France
| | - S Dupont
- Unité d'épileptologie, neurologie 1, hôpital Pitié-Salpêtrière, AP-HP, Paris47, boulevard de l'hôpital, 75651 Paris cedex 13, France
| | - V Navarro
- Inserm U1127, CNRS UMR7225, institut du cerveau et de la moelle épinière, ICM, Paris Sorbonne universités, UPMC, université de Paris 06, UMR S1127, 47, boulevard de l'hôpital, 75651 Paris cedex 13, France; Unité d'épileptologie, neurologie 1, hôpital Pitié-Salpêtrière, AP-HP, Paris47, boulevard de l'hôpital, 75651 Paris cedex 13, France
| | - E Roze
- Inserm U1127, CNRS UMR7225, institut du cerveau et de la moelle épinière, ICM, Paris Sorbonne universités, UPMC, université de Paris 06, UMR S1127, 47, boulevard de l'hôpital, 75651 Paris cedex 13, France; Département de neurologie, hôpital Pitié-Salpêtrière, AP-HP, 47, boulevard de l'hôpital, 75651 Paris cedex 13, France
| | - I Gourfinkel-An
- Unité d'épileptologie, neurologie 1, hôpital Pitié-Salpêtrière, AP-HP, Paris47, boulevard de l'hôpital, 75651 Paris cedex 13, France; Centre de référence épilepsie rare, hôpital Pitié-Salpêtrière, AP-HP, Paris, France
| | - E Apartis
- Unité de neurophysiologie, département DéPAS, hôpital Saint-Antoine, AP-HP, 184, rue du Faubourg-Saint-Antoine, 75012 Paris, France; Inserm U1127, CNRS UMR7225, institut du cerveau et de la moelle épinière, ICM, Paris Sorbonne universités, UPMC, université de Paris 06, UMR S1127, 47, boulevard de l'hôpital, 75651 Paris cedex 13, France.
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