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Huang F, Gonçalves C, Bartish M, Rémy-Sarrazin J, Issa ME, Cordeiro B, Guo Q, Emond A, Attias M, Yang W, Plourde D, Su J, Gimeno MG, Zhan Y, Galán A, Rzymski T, Mazan M, Masiejczyk M, Faber J, Khoury E, Benoit A, Gagnon N, Dankort D, Journe F, Ghanem GE, Krawczyk CM, Saragovi HU, Piccirillo CA, Sonenberg N, Topisirovic I, Rudd CE, Miller WH, del Rincón SV. Inhibiting the MNK1/2-eIF4E axis impairs melanoma phenotype switching and potentiates antitumor immune responses. J Clin Invest 2024; 134:e181575. [PMID: 38690739 PMCID: PMC11060722 DOI: 10.1172/jci181575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024] Open
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2
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Vivion M, Reid V, Dubé E, Coutant A, Benoit A, Tourigny A. How older adults manage misinformation and information overload - A qualitative study. BMC Public Health 2024; 24:871. [PMID: 38515081 PMCID: PMC10956171 DOI: 10.1186/s12889-024-18335-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 03/12/2024] [Indexed: 03/23/2024] Open
Abstract
BACKGROUND The COVID-19 pandemic was characterized by an abundance of information, some of it reliable and some of it misinformation. Evidence-based data on the impact of misinformation on attitudes and behaviours remains limited. Studies indicate that older adults are more likely to embrace and disseminate misinformation than other population groups, making them vulnerable to misinformation. The purpose of this article is to explore the effects of misinformation and information overload on older adults, and to present the management strategies put in place to deal with such effects, in the context of COVID-19. METHODS A qualitative exploratory approach was adopted to conduct this research. A total of 36 semi-structured interviews were conducted with older adults living in Quebec, Canada. The interviews were fully transcribed and subjected to a thematic content analysis. RESULTS Participants said they could easily spot misinformation online. Despite this, misinformation and its treatment by the media could generate fear, stress and anxiety. Moreover, the polarization induced by misinformation resulted in tensions and even friendship breakdowns. Participants also denounced the information overload produced largely by the media. To this end, the participants set up information routines targeting the sources of information and the times at which they consulted the information. CONCLUSIONS This article questions the concept of vulnerability to misinformation by highlighting older adults' agency in managing misinformation and information overload. Furthermore, this study invites us to rethink communication strategies by distinguishing between information overload and misinformation.
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Affiliation(s)
- M Vivion
- Department of Social and Preventive Medecine, Université Laval, Quebec, Canada.
- CHU de Québec-Université Laval Research Center, Quebec, Canada.
| | - V Reid
- CHU de Québec-Université Laval Research Center, Quebec, Canada
- Laboratoire sur la communication et le numérique (LabCMO), Montreal, Canada
| | - E Dubé
- CHU de Québec-Université Laval Research Center, Quebec, Canada
- Department of Anthropology, Université Laval, Quebec, Canada
| | - A Coutant
- Laboratoire sur la communication et le numérique (LabCMO), Montreal, Canada
- Université du Québec à Montréal (UQAM), Montreal, Canada
| | - A Benoit
- GDR AREES (Groupe de recherche: Arctique: Enjeux pour l'environnement et les sociétés) du CRNS, Paris, France
| | - A Tourigny
- Institut sur le vieillissement et la participation sociale des aînés de l'Université Laval, Quebec, Canada
- VITAM Centre de recherche en santé durable, Quebec, Canada
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Benoit A, Abraham MJ, Li S, Kim J, Estrada-Tejedor R, Bakadlag R, Subramaniam N, Makhani K, Guilbert C, Tu R, Salaciak M, Klein KO, Coyle KM, Hilton LK, Santiago R, Dmitrienko S, Assouline S, Morin RD, Del Rincon SV, Johnson NA, Mann KK. STAT6 mutations enriched at diffuse large B-cell lymphoma relapse reshape the tumor microenvironment. Int J Hematol 2024; 119:275-290. [PMID: 38285120 PMCID: PMC10920476 DOI: 10.1007/s12185-023-03692-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 12/07/2023] [Accepted: 12/20/2023] [Indexed: 01/30/2024]
Abstract
Diffuse large B-cell lymphoma (DLBCL) relapses in approximately 40% of patients following frontline therapy. We reported that STAT6D419 mutations are enriched in relapsed/refractory DLBCL (rrDLBCL) samples, suggesting that JAK/STAT signaling plays a role in therapeutic resistance. We hypothesized that STAT6D419 mutations can improve DLBCL cell survival by reprogramming the microenvironment to sustain STAT6 activation. Thus, we investigated the role of STAT6D419 mutations on DLBCL cell growth and its microenvironment. We found that phospho-STAT6D419N was retained in the nucleus longer than phospho-STAT6WT following IL-4 stimulation, and STAT6D419N recognized a more restricted DNA-consensus sequence than STAT6WT. Upon IL-4 induction, STAT6D419N expression led to a higher magnitude of gene expression changes, but in a more selective list of gene targets compared with STATWT. The most significantly expressed genes induced by STAT6D419N were those implicated in survival, proliferation, migration, and chemotaxis, in particular CCL17. This chemokine, also known as TARC, attracts helper T-cells to the tumor microenvironment, especially in Hodgkin's lymphoma. To this end, in DLBCL, phospho-STAT6+ rrDLBCL cells had a greater proportion of infiltrating CD4+ T-cells than phospho-STAT6- tumors. Our findings suggest that STAT6D419 mutations in DLBCL lead to cell autonomous changes, enhanced signaling, and altered composition of the tumor microenvironment.
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Affiliation(s)
- Alexandre Benoit
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
- Division of Experimental Medicine, McGill University, Montreal, QC, Canada
| | - Madelyn J Abraham
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
- Division of Experimental Medicine, McGill University, Montreal, QC, Canada
| | - Sheena Li
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
| | - John Kim
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
- University of British Columbia, Vancouver, BC, Canada
| | - Roger Estrada-Tejedor
- Organic and Pharmaceutical Chemistry Department, IQS School of Engineering, Universitat Ramon Llull, Barcelona, Spain
| | - Rowa Bakadlag
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
- Division of Experimental Medicine, McGill University, Montreal, QC, Canada
| | - Nivetha Subramaniam
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
- Division of Experimental Medicine, McGill University, Montreal, QC, Canada
| | - Kiran Makhani
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
- Division of Experimental Medicine, McGill University, Montreal, QC, Canada
| | - Cynthia Guilbert
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
| | - Raymond Tu
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada
| | - Matthew Salaciak
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
- Division of Experimental Medicine, McGill University, Montreal, QC, Canada
| | - Kathleen Oros Klein
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
| | - Krysta Mila Coyle
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
| | - Laura K Hilton
- Centre for Lymphoid Cancer, British Columbia Cancer, Vancouver, BC, Canada
| | - Raoul Santiago
- Department of Pediatrics, Faculty of Medicine, Universite Laval, Quebec City, QC, Canada
| | - Svetlana Dmitrienko
- Division of Pathology, McGill University Health Centre, Montreal, QC, Canada
| | - Sarit Assouline
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
- Division of Experimental Medicine, McGill University, Montreal, QC, Canada
- Department of Oncology, McGill University, Montreal, QC, Canada
| | - Ryan D Morin
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
| | - Sonia V Del Rincon
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
- Division of Experimental Medicine, McGill University, Montreal, QC, Canada
| | - Nathalie A Johnson
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
- Division of Experimental Medicine, McGill University, Montreal, QC, Canada
- Department of Oncology, McGill University, Montreal, QC, Canada
| | - Koren K Mann
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada.
- Division of Experimental Medicine, McGill University, Montreal, QC, Canada.
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada.
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4
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Jacq K, Rapuc W, Benoit A, Coquin D, Fanget B, Perrette Y, Sabatier P, Wilhelm B, Debret M, Arnaud F. Sedimentary structure discrimination with hyperspectral imaging in sediment cores. Sci Total Environ 2022; 817:152018. [PMID: 34856285 DOI: 10.1016/j.scitotenv.2021.152018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/23/2021] [Accepted: 11/23/2021] [Indexed: 06/13/2023]
Abstract
Hyperspectral imaging (HSI) is a non-destructive, high-resolution imaging technique that is currently under significant development for analyzing geological areas with remote devices or natural samples in a laboratory. In both cases, the hyperspectral image provides several sedimentary structures that must be separated to temporally and spatially describe the sample. Sediment sequences are composed of successive deposits (strata, homogenite, flood) that are visible depending on sample properties. The classical methods to identify them are time-consuming, have a low spatial resolution (millimeters) and are generally based on naked-eye counting. In this study, we compare several supervised classification algorithms to discriminate sedimentological structures in lake sediments. Instantaneous events in lake sediments are generally linked to extreme geodynamical events (e.g., floods, earthquakes), so their identification and counting are essential to understand long-term fluctuations and improve hazard assessments. Identification and counting are done by reconstructing a chronicle of event layer occurrence, including estimation of deposit thicknesses. Here, we applied two hyperspectral imaging sensors (Visible Near-Infrared, VNIR, 60 μm, 400-1000 nm; Short Wave Infrared, SWIR, 200 μm, 1000-2500 nm) on three sediment cores from different lake systems. We highlight that the SWIR sensor is the optimal one for creating robust classification models with discriminant analyses (prediction accuracies of 0.87-0.98). Indeed, the VNIR sensor is impacted by the surface reliefs and structures that are not in the learning set, which causes mis-classification. These observations are also valid for the combined sensor (VNIR-SWIR) and the RGB images. Several spatial and spectral pre-processing were also compared and enabled one to highlight discriminant information specific to a sample and a sensor. These works show that the combined use of hyperspectral imaging and machine learning improves the characterization of sedimentary structures compared to conventional methods.
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Affiliation(s)
- Kévin Jacq
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, EDYTEM, 73000 Chambéry, France; Univ. Savoie Mont Blanc, LISTIC, 74000 Annecy, France.
| | - William Rapuc
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, EDYTEM, 73000 Chambéry, France
| | | | - Didier Coquin
- Univ. Savoie Mont Blanc, LISTIC, 74000 Annecy, France
| | - Bernard Fanget
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, EDYTEM, 73000 Chambéry, France
| | - Yves Perrette
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, EDYTEM, 73000 Chambéry, France
| | - Pierre Sabatier
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, EDYTEM, 73000 Chambéry, France
| | - Bruno Wilhelm
- Institute for Geosciences and Environmental Research, University Grenoble Alpes, CNRS, IRD, Grenoble, France
| | - Maxime Debret
- Univ. Rouen Normandie, Univ. Caen, CNRS, M2C, 76821 Mont-Saint-Aignan, France
| | - Fabien Arnaud
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, EDYTEM, 73000 Chambéry, France
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5
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Fasano A, Catalano A, Macías-Pérez J, Aguiar M, Beelen A, Benoit A, Bideaud A, Bounmy J, Bourrion O, Bres G, Calvo M, Castro-Almazán J, de Bernardis P, De Petris M, de Taoro A, Fernández-Torreiro M, Garde G, Génova-Santos R, Gomez A, Gómez-Renasco M, Goupy J, Hoarau C, Hoyland R, Lagache G, Marpaud J, Marton M, Monfardini A, Peel M, Pisano G, Ponthieu N, Rebolo R, Roudier S, Rubiño-Martín J, Tourres D, Tucker C, Vescovi C. Observations with KIDs Interferometer Spectrum Survey (KISS). EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202225700017] [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: 11/14/2022] Open
Abstract
We describe the preliminary on-sky results of the KIDs Interferometer Spectrum Survey (KISS), a spectral imager with a 1 deg field of view (FoV). The instrument operates in the range 120–180 GHz from the 2.25m Q-U-I JOint TEnerife telescope in Teide Observatory (Tenerife, Canary Islands), at 2 395m altitude above sea level. Spectra at low resolution, up to 1.45 GHz, are obtained using a fast (3.72 Hz mechanical frequency) Fourier transform spectrometer, coupled to a continuous dilution cryostat with a stabilized temperature of 170mK that hosts two 316-pixel arrays of lumped-element kinetic inductance detectors. KISS generates more than 3 000 spectra per second during observations and represents a pathfinder to demonstrate the potential for spectral mapping with large FoV.We give an overall description of the spectral mapping paradigm and we present recent results from observations, in this paper.
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6
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Catalano A, Ade P, Aravena M, Barria E, Beelen A, Benoit A, Béthermin M, Bounmy J, Bourrion O, Bres G, De Breuck C, Calvo M, Désert FX, Durán C, Duvauchelle G, Eraud L, Fasano A, Fenouillet T, Garcia J, Garde G, Goupy J, Groppi C, Hoarau C, Hu W, Lagache G, Lambert JC, Leggeri JP, Levy-Bertrand F, Macías-Pérez J, Mani H, Marpaud J, Marton M, Mauskopf P, Monfardini A, Pisano G, Ponthieu N, Prieur L, Raffin G, Roni S, Roudier S, Tourres D, Tucker C, Vivargent L. CONCERTO at APEX: Installation and first phase of on-sky commissioning. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202225700010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
CONCERTO (CarbON CII line in post-rEionisation and ReionisaTiOn) is a large field-of-view (FoV) spectro-imager that has been installed on the Cassegrain Cabin of Atacama Pathfinder EXperiment (APEX) telescope in April 2021. CONCERTO hosts 2 focal planes and a total number of 4000 Kinetic Inductance Detectors (KID), with an instantaneous FoV of 18.6 arcminutes in the range of 130-310 GHz. The spectral resolution can be easily tuned down to 1 GHz depending on the scientific target. The scientific program of CONCERTO has many objectives, with two main programs focused on mapping the fluctuations of the [CII] line intensity in the reionisation and postreionisation epoch (4.5<z<8.5), and on studying galaxy clusters via the thermal and kinetic Sunyaev-Zel’dovich (SZ) effect. CONCERTO will also measure the dust and molecular gas contents of local and intermediate-redshift galaxies, it will study the Galactic star-forming clouds and finally it will observe the CO intensity fluctuations arising from 0.3<z<2 galaxies.
The design of the instrument, installation at APEX and current status of the commissioning phase and science verification will be presented. Also we describe the deployment and first on-sky tests performed between April and June 2021.
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7
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Benoit A, Bou-Petit E, Chou H, Lu M, Guilbert C, Luo VM, Assouline S, Morin RD, Dmitrienko S, Estrada-Tejedor R, Johnson NA, Mann KK. Mutated RAS-associating proteins and ERK activation in relapse/refractory diffuse large B cell lymphoma. Sci Rep 2022; 12:779. [PMID: 35039569 PMCID: PMC8764096 DOI: 10.1038/s41598-021-04736-0] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 12/06/2021] [Indexed: 11/16/2022] Open
Abstract
Diffuse large B cell lymphoma (DLBCL) is successfully treated with combination immuno-chemotherapy, but relapse with resistant disease occurs in ~ 40% of patients. However, little is known regarding relapsed/refractory DLBCL (rrDLBCL) genetics and alternative therapies. Based on findings from other tumors, we hypothesized that RAS-MEK-ERK signaling would be upregulated in resistant tumors, potentially correlating with mutations in RAS, RAF, or associated proteins. We analyzed mutations and phospho-ERK levels in tumor samples from rrDLBCL patients. Unlike other tumor types, rrDLBCL is not mutated in any Ras or Raf family members, despite having increased expression of p-ERK. In paired biopsies comparing diagnostic and relapsed specimens, 33% of tumors gained p-ERK expression, suggesting a role in promoting survival. We did find mutations in several Ras-associating proteins, including GEFs, GAPs, and downstream effectors that could account for increased ERK activation. We further investigated mutations in one such protein, RASGRP4. In silico modeling indicated an increased interaction between H-Ras and mutant RASGRP4. In cell lines, mutant RASGRP4 increased basal p-ERK expression and lead to a growth advantage in colony forming assays when challenged with doxorubicin. Relapsed/refractory DLBCL is often associated with increased survival signals downstream of ERK, potentially corresponding with mutations in protein controlling RAS/MEK/ERK signaling.
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Affiliation(s)
- Alexandre Benoit
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada.,Division of Experimental Medicine, McGill University, Montreal, QC, Canada
| | - Elisabeth Bou-Petit
- Grup de Química Farmacèutica, IQS School of Engineering, Universitat Ramon Llull, Barcelona, Spain
| | - Hsiang Chou
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada.,Division of Experimental Medicine, McGill University, Montreal, QC, Canada
| | - Melissa Lu
- Université de Montréal-Faculté de Médecine, Montreal, Canada
| | - Cynthia Guilbert
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada
| | - Vincent Mingyi Luo
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada.,Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada
| | - Sarit Assouline
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada.,Division of Experimental Medicine, McGill University, Montreal, QC, Canada.,Gerald Bronfman Department of Oncology, McGill University, Montreal, QC, Canada
| | - Ryan D Morin
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
| | - Svetlana Dmitrienko
- Division of Pathology, McGill University Health Centre, Montreal, QC, Canada
| | - Roger Estrada-Tejedor
- Grup de Química Farmacèutica, IQS School of Engineering, Universitat Ramon Llull, Barcelona, Spain
| | - Nathalie A Johnson
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada.,Division of Experimental Medicine, McGill University, Montreal, QC, Canada.,Gerald Bronfman Department of Oncology, McGill University, Montreal, QC, Canada
| | - Koren K Mann
- Lady Davis Institute, Jewish General Hospital, 3755 Côte Sainte-Catherine Road, Montreal, QC, H3T 1E2, Canada. .,Division of Experimental Medicine, McGill University, Montreal, QC, Canada. .,Gerald Bronfman Department of Oncology, McGill University, Montreal, QC, Canada.
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8
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Sellami I, Grynberg M, Benoit A, Sifer C, Mayeur A, Sonigo C. O-180 Oocyte vitrification for fertility preservation does not delay the initiation of neoadjuvant chemotherapy for breast cancer. Hum Reprod 2021. [DOI: 10.1093/humrep/deab127.081] [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] [Indexed: 11/13/2022] Open
Abstract
Abstract
Study question
Does oocyte vitrification for fertility preservation (FP) delay the initiation of neoadjuvant chemotherapy for breast cancer?
Summary answer
The indication of neoadjuvant chemotherapy for breast cancer should not be considered as an impediment to urgent oocyte vitrification for FP.
What is known already
FP is considered as one of the most important issues to address for young breast cancer patients. Cryopreservation of oocytes or embryos may be considered after controlled ovarian hyperstimulation (COH) or in vitro maturation (IVM). Pregnancies have been reported after reutilization of oocytes frozen following both procedures. Although oocyte competence is better after COH, this strategy requires on average 13 days to be achieved. In addition, the safety of ovarian stimulation before tumor removal is currently not formally established. In case of neoadjuvant chemotherapy, the risk-benefit balance of COH is not well known.
Study design, size, duration
Retrospective cohort study including all breast cancer patients eligible for oocyte vitrification following COH or IVM before initiation of neoadjuvant chemotherapy between January 2016 and December 2020.
Participants/materials, setting, methods
Inclusion criteria were: female patients with confirmed non metastatic breast cancer, 18 to 40 years of age, with indication of neoadjuvant chemotherapy, who have had oocyte retrieval for FP after COH or IVM +/- cryopreservation of ovarian tissue. Various time-points related to cancer diagnosis, FP or chemotherapy were obtained from medical record review.
Main results and the role of chance
A total of 198 patients with confirmed breast cancer who had oocyte retrieval following COH (n = 57) or IVM +/- cryopreservation of ovarian tissue (n = 141) for FP prior to neoadjuvant chemotherapy were included. Although women in IVM group were significantly younger as compared to patients who underwent COH (31.7 ± 4.2 vs. 33.3 ± 4.0 years, p = 0.019), ovarian reserve parameters, BMI and cancer stage did not differ between the two groups. Overall, the average time from cancer diagnosis to chemotherapy start was similar between patients having undergone COH or IVM before oocyte vitrification (37.3 ± 13.8 vs. 36.9 ±13.5 days in COH and IVM groups respectively, p=0.857).
Limitations, reasons for caution
The time from referral to FP consultation may have influenced the type of FP. In addition, the retrospective nature of the present analysis may constitute a limitation. Moreover, the efficiency and security of the different FP strategies used has not been analysed.
Wider implications of the findings
Oocyte vitrification following COH or IVM was not associated with delayed breast cancer treatment in the neoadjuvant setting, so long as there was a prompt FP referral. Young patients undergoing neoadjuvant chemotherapy should be informed of these findings to avoid unnecessary anxiety due to concern for delays.
Trial registration number
Not applicable
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Affiliation(s)
- I Sellami
- Antoine Beclere Hospital, Reproductive Medicine and fertility preservation, Clamart, France
| | - M Grynberg
- Antoine Beclere Hospital, Reproductive Medicine and fertility preservation, Clamart, France
| | - A Benoit
- Antoine Beclere Hospital, Reproductive Medicine and fertility preservation, Clamart, France
| | - C Sifer
- Jean Verdier Hospital, Reproductive Medicine and fertility preservation, Bondy, France
| | - A Mayeur
- Antoine Beclere Hospital, Reproductive Medicine and fertility preservation, Clamart, France
| | - C Sonigo
- Antoine Beclere Hospital, Reproductive Medicine and fertility preservation, Clamart, France
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9
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Huang F, Gonçalves C, Bartish M, Rémy-Sarrazin J, Issa ME, Cordeiro B, Guo Q, Emond A, Attias M, Yang W, Plourde D, Su J, Gimeno MG, Zhan Y, Galán A, Rzymski T, Mazan M, Masiejczyk M, Faber J, Khoury E, Benoit A, Gagnon N, Dankort D, Journe F, Ghanem GE, Krawczyk CM, Saragovi HU, Piccirillo CA, Sonenberg N, Topisirovic I, Rudd CE, Miller WH, del Rincón SV. Inhibiting the MNK1/2-eIF4E axis impairs melanoma phenotype switching and potentiates antitumor immune responses. J Clin Invest 2021; 131:140752. [PMID: 33690225 PMCID: PMC8262472 DOI: 10.1172/jci140752] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [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: 05/28/2020] [Accepted: 03/03/2021] [Indexed: 12/19/2022] Open
Abstract
Melanomas commonly undergo a phenotype switch, from a proliferative to an invasive state. Such tumor cell plasticity contributes to immunotherapy resistance; however, the mechanisms are not completely understood and thus are therapeutically unexploited. Using melanoma mouse models, we demonstrated that blocking the MNK1/2-eIF4E axis inhibited melanoma phenotype switching and sensitized melanoma to anti-PD-1 immunotherapy. We showed that phospho-eIF4E-deficient murine melanomas expressed high levels of melanocytic antigens, with similar results verified in patient melanomas. Mechanistically, we identified phospho-eIF4E-mediated translational control of NGFR, a critical effector of phenotype switching. Genetic ablation of phospho-eIF4E reprogrammed the immunosuppressive microenvironment, exemplified by lowered production of inflammatory factors, decreased PD-L1 expression on dendritic cells and myeloid-derived suppressor cells, and increased CD8+ T cell infiltrates. Finally, dual blockade of the MNK1/2-eIF4E axis and the PD-1/PD-L1 immune checkpoint demonstrated efficacy in multiple melanoma models regardless of their genomic classification. An increase in the presence of intratumoral stem-like TCF1+PD-1+CD8+ T cells, a characteristic essential for durable antitumor immunity, was detected in mice given a MNK1/2 inhibitor and anti-PD-1 therapy. Using MNK1/2 inhibitors to repress phospho-eIF4E thus offers a strategy to inhibit melanoma plasticity and improve response to anti-PD-1 immunotherapy.
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Affiliation(s)
- Fan Huang
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | | | - Margarita Bartish
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | | | - Mark E. Issa
- Maisonneuve-Rosemont Hospital Research Centre, Montréal, Quebec, Canada
| | | | - Qianyu Guo
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | - Audrey Emond
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
| | - Mikhael Attias
- Department of Microbiology and Immunology and
- Research Institute of the McGill University Health Centre, McGill University, Montréal, Quebec, Canada
| | - William Yang
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | - Dany Plourde
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
| | - Jie Su
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
| | - Marina Godoy Gimeno
- University Veterinary Teaching Hospital Camden, Faculty of Science, University of Sydney, Sydney, New South Wales, Australia
| | - Yao Zhan
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | - Alba Galán
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
| | | | | | | | | | - Elie Khoury
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | - Alexandre Benoit
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | - Natascha Gagnon
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
| | - David Dankort
- Department of Biology and
- Goodman Cancer Research Center, McGill University, Montréal, Quebec, Canada
| | - Fabrice Journe
- Laboratory of Oncology and Experimental Surgery, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Ghanem E. Ghanem
- Laboratory of Oncology and Experimental Surgery, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | | | - H. Uri Saragovi
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Department of Pharmacology and Therapeutics
| | - Ciriaco A. Piccirillo
- Department of Microbiology and Immunology and
- Research Institute of the McGill University Health Centre, McGill University, Montréal, Quebec, Canada
| | - Nahum Sonenberg
- Goodman Cancer Research Center, McGill University, Montréal, Quebec, Canada
- Department of Biochemistry, and
| | - Ivan Topisirovic
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
- McGill Centre for Translational Research in Cancer, McGill University, Montréal, Quebec, Canada
| | - Christopher E. Rudd
- Maisonneuve-Rosemont Hospital Research Centre, Montréal, Quebec, Canada
- McGill Centre for Translational Research in Cancer, McGill University, Montréal, Quebec, Canada
| | - Wilson H. Miller
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
- McGill Centre for Translational Research in Cancer, McGill University, Montréal, Quebec, Canada
| | - Sonia V. del Rincón
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
- McGill Centre for Translational Research in Cancer, McGill University, Montréal, Quebec, Canada
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10
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Steeman A, Mazairac G, Kirsch L, Frusch N, Morandini E, Benoit A. [Six cases of acute pulmonary embolism associated with COVID-19]. Rev Med Liege 2020; 75:94-100. [PMID: 33211429] [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] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Rising from the province of Wuhan in China, the new coronavirus SARS-CoV-2 broke out in winter 2019, causing a global pandemic. In most cases reported, COVID-19 symptoms include cough, dyspnea, myalgia and asthenia. In some cases, the disease can also cause severe respiratory distress syndrome, requiring intensive care. Recent studies suggest that SARS-CoV-2 infection predisposes to thromboembolic event such as pulmonary embolism. Moreover, there is an overlap between signs and symptoms of pulmonary embolism and COVID-19, which brings a challenge for the diagnosis and could potentially be fatal. Nevertheless, the incidence rate of pulmonary embolism in cases of COVID-19 is currently not known. In this paper we describe six cases of pulmonary embolism associated with COVID-19.
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Affiliation(s)
- A Steeman
- Service des Urgences, CH des Ardennes, Libramont-Chevigny, Belgique
| | - G Mazairac
- Service des Urgences, CH des Ardennes, Libramont-Chevigny, Belgique
| | - L Kirsch
- Service des Urgences, CH des Ardennes, Libramont-Chevigny, Belgique
| | - N Frusch
- Service de Cardiologie-Pneumologie, CH des Ardennes, Libramont-Chevigny, Belgique
| | - E Morandini
- Service de Cardiologie-Pneumologie, CH des Ardennes, Libramont-Chevigny, Belgique
| | - A Benoit
- Service de Cardiologie-Pneumologie, CH des Ardennes, Libramont-Chevigny, Belgique
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11
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Bertrand J, Boyazis P, Morandini E, Buche M, Benoit A. [Coronary aneurysm, it exists !]. Rev Med Liege 2020; 75:697-698. [PMID: 33155440] [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] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Coronary aneurysm has an incidence of 1,1 to 4,9 % in patients undergoing a coronary angiography. Many etiologies may be accused, atherosclerosis is associated in up to 50 % of cases. We report the case of a 76-year-old patient with a large coronary aneurysm.
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Affiliation(s)
- J Bertrand
- Service de Cardiologie, Hôpital de Libramont, Belgique
| | - P Boyazis
- Service de Cardiologie, Hôpital de Libramont, Belgique
| | - E Morandini
- Service de Cardiologie, Hôpital de Libramont, Belgique
| | - M Buche
- Service de Chirurgie, Clinique Saint-Luc, Bouge, Belgique
| | - A Benoit
- Service de Cardiologie, Hôpital de Libramont, Belgique
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12
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Prévost J, Gasser R, Beaudoin-Bussières G, Richard J, Duerr R, Laumaea A, Anand SP, Goyette G, Benlarbi M, Ding S, Medjahed H, Lewin A, Perreault J, Tremblay T, Gendron-Lepage G, Gauthier N, Carrier M, Marcoux D, Piché A, Lavoie M, Benoit A, Loungnarath V, Brochu G, Haddad E, Stacey HD, Miller MS, Desforges M, Talbot PJ, Maule GTG, Côté M, Therrien C, Serhir B, Bazin R, Roger M, Finzi A. Cross-Sectional Evaluation of Humoral Responses against SARS-CoV-2 Spike. Cell Rep Med 2020; 1:100126. [PMID: 33015650 PMCID: PMC7524645 DOI: 10.1016/j.xcrm.2020.100126] [Citation(s) in RCA: 152] [Impact Index Per Article: 38.0] [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: 06/12/2020] [Revised: 08/20/2020] [Accepted: 09/21/2020] [Indexed: 01/10/2023]
Abstract
SARS-CoV-2 is responsible for the coronavirus disease 2019 (COVID-19) pandemic, infecting millions of people and causing hundreds of thousands of deaths. The Spike glycoproteins of SARS-CoV-2 mediate viral entry and are the main targets for neutralizing antibodies. Understanding the antibody response directed against SARS-CoV-2 is crucial for the development of vaccine, therapeutic, and public health interventions. Here, we perform a cross-sectional study on 106 SARS-CoV-2-infected individuals to evaluate humoral responses against SARS-CoV-2 Spike. Most infected individuals elicit anti-Spike antibodies within 2 weeks of the onset of symptoms. The levels of receptor binding domain (RBD)-specific immunoglobulin G (IgG) persist over time, and the levels of anti-RBD IgM decrease after symptom resolution. Although most individuals develop neutralizing antibodies within 2 weeks of infection, the level of neutralizing activity is significantly decreased over time. Our results highlight the importance of studying the persistence of neutralizing activity upon natural SARS-CoV-2 infection.
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Affiliation(s)
- Jérémie Prévost
- Centre de Recherche du CHUM, Montreal, QC H2X 0A9, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC H2X 0A9, Canada
| | - Romain Gasser
- Centre de Recherche du CHUM, Montreal, QC H2X 0A9, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC H2X 0A9, Canada
| | - Guillaume Beaudoin-Bussières
- Centre de Recherche du CHUM, Montreal, QC H2X 0A9, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC H2X 0A9, Canada
| | - Jonathan Richard
- Centre de Recherche du CHUM, Montreal, QC H2X 0A9, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC H2X 0A9, Canada
| | - Ralf Duerr
- Department of Pathology, New York University School of Medicine, New York, NY 10016, USA
| | - Annemarie Laumaea
- Centre de Recherche du CHUM, Montreal, QC H2X 0A9, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC H2X 0A9, Canada
| | - Sai Priya Anand
- Centre de Recherche du CHUM, Montreal, QC H2X 0A9, Canada
- Department of Microbiology and Immunology, McGill University, Montreal, QC H3A 2B4, Canada
| | | | - Mehdi Benlarbi
- Centre de Recherche du CHUM, Montreal, QC H2X 0A9, Canada
| | - Shilei Ding
- Centre de Recherche du CHUM, Montreal, QC H2X 0A9, Canada
| | | | - Antoine Lewin
- Héma-Québec, Affaires Médicales et Innovation, Québec, QC G1V 5C3, Canada
| | - Josée Perreault
- Héma-Québec, Affaires Médicales et Innovation, Québec, QC G1V 5C3, Canada
| | - Tony Tremblay
- Héma-Québec, Affaires Médicales et Innovation, Québec, QC G1V 5C3, Canada
| | | | | | - Marc Carrier
- Hôpital Cité-de-la-Santé, Laval, QC H7M 3L9, Canada
| | | | - Alain Piché
- Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC J1H 5H4, Canada
| | - Myriam Lavoie
- CIUSSS du Saguenay-Lac-Saint-Jean, Hôpital de Chicoutimi, Chicoutimi, QC G7H 5H6, Canada
| | | | | | - Gino Brochu
- CIUSSS de la Mauricie-et-du-Centre-du-Québec, Trois-Rivières, QC G9A 5C5, Canada
| | - Elie Haddad
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC H2X 0A9, Canada
- CHU Ste-Justine, Montreal, QC H3T 1C5, Canada
- Département de Pédiatrie, Université de Montréal, Montreal, QC H3T 1C5, Canada
| | - Hannah D. Stacey
- Micheal G. DeGroote Institute for Infectious Disease Research, Master Immunology Research Centre, Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON L8N 3Z5, Canada
| | - Matthew S. Miller
- Micheal G. DeGroote Institute for Infectious Disease Research, Master Immunology Research Centre, Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON L8N 3Z5, Canada
| | - Marc Desforges
- INRS-Institut Armand Frappier, Laval, QC H7V 1B7, Canada
- CHU Ste-Justine, Montreal, QC H3T 1C5, Canada
| | | | - Graham T. Gould Maule
- Department of Biochemistry, Microbiology and Immunology, and Center for Infection, Immunity, and Inflammation, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Marceline Côté
- Department of Biochemistry, Microbiology and Immunology, and Center for Infection, Immunity, and Inflammation, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Christian Therrien
- Laboratoire de Santé Publique du Québec, Institut national de santé publique du Québec, Sainte-Anne-de-Bellevue, QC H9X 3R5, Canada
| | - Bouchra Serhir
- Laboratoire de Santé Publique du Québec, Institut national de santé publique du Québec, Sainte-Anne-de-Bellevue, QC H9X 3R5, Canada
| | - Renée Bazin
- Héma-Québec, Affaires Médicales et Innovation, Québec, QC G1V 5C3, Canada
| | - Michel Roger
- Centre de Recherche du CHUM, Montreal, QC H2X 0A9, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC H2X 0A9, Canada
- Laboratoire de Santé Publique du Québec, Institut national de santé publique du Québec, Sainte-Anne-de-Bellevue, QC H9X 3R5, Canada
| | - Andrés Finzi
- Centre de Recherche du CHUM, Montreal, QC H2X 0A9, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC H2X 0A9, Canada
- Department of Microbiology and Immunology, McGill University, Montreal, QC H3A 2B4, Canada
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13
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Fouquet V, Tapie L, Attal JP, Benoit A. Design optimization of a functionally graded overlay using FEA. Comput Methods Biomech Biomed Engin 2020. [DOI: 10.1080/10255842.2020.1812858] [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: 10/23/2022]
Affiliation(s)
- V. Fouquet
- Université de Paris, URB2I, UR 4462, Montrouge, France
| | - L. Tapie
- Université Sorbonne Paris Nord, URB2I, UR 4462, Bobigny, France
| | - J. P. Attal
- Université de Paris, URB2I, UR 4462, Montrouge, France
| | - A. Benoit
- Université de Paris, URB2I, UR 4462, Montrouge, France
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14
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Prévost J, Gasser R, Beaudoin-Bussières G, Richard J, Duerr R, Laumaea A, Anand SP, Goyette G, Benlarbi M, Ding S, Medjahed H, Lewin A, Perreault J, Tremblay T, Gendron-Lepage G, Gauthier N, Carrier M, Marcoux D, Piché A, Lavoie M, Benoit A, Loungnarath V, Brochu G, Haddad E, Stacey HD, Miller MS, Desforges M, Talbot PJ, Gould Maule GT, Côté M, Therrien C, Serhir B, Bazin R, Roger M, Finzi A. Cross-sectional evaluation of humoral responses against SARS-CoV-2 Spike. bioRxiv 2020. [PMID: 32577637 DOI: 10.1101/2020.06.08.140244] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The SARS-CoV-2 virus is responsible for the current worldwide coronavirus disease 2019 (COVID-19) pandemic, infecting millions of people and causing hundreds of thousands of deaths. The Spike glycoprotein of SARS-CoV-2 mediates viral entry and is the main target for neutralizing antibodies. Understanding the antibody response directed against SARS-CoV-2 is crucial for the development of vaccine, therapeutic and public health interventions. Here we performed a cross-sectional study on 106 SARS-CoV-2-infected individuals to evaluate humoral responses against the SARS-CoV-2 Spike. The vast majority of infected individuals elicited anti-Spike antibodies within 2 weeks after the onset of symptoms. The levels of receptor-binding domain (RBD)-specific IgG persisted overtime, while the levels of anti-RBD IgM decreased after symptoms resolution. Some of the elicited antibodies cross-reacted with other human coronaviruses in a genus-restrictive manner. While most of individuals developed neutralizing antibodies within the first two weeks of infection, the level of neutralizing activity was significantly decreased over time. Our results highlight the importance of studying the persistence of neutralizing activity upon natural SARS-CoV-2 infection.
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15
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Huang F, Gonçalves C, Guo Q, Rémy-Sarrazin J, Emond A, Yang W, Plourde D, Bartish M, Su J, Zhan Y, Gimeno MG, Khoury E, Benoit A, Dankort D, Miller WH, del Rincón SV. Abstract A53: Phosphorylation of eIF4E promotes phenotype switching and MDSC-mediated immunosuppression in melanoma. Cancer Immunol Res 2020. [DOI: 10.1158/2326-6074.tumimm19-a53] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Introduction: Melanoma is the deadliest form of skin cancer. Melanoma phenotype switching is characterized by reduced expression of melanocyte lineage transcription factor MITF and its downstream targets, leading to increased invasiveness of melanoma cells and resistance to both targeted therapy and immunotherapy, and worse prognosis. In melanoma, MAPK and PI3K pathways ultimately converge upon eukaryotic translation initiation factor 4E (eIF4E) to induce its phosphorylation (p-eIF4E), which is critical for the oncogenicity of eIF4E. Here, we investigate the role of p-eIF4E in melanoma progression and tumor immunity.
Methods: We crossed p-eIF4E deficient (eIF4EKI) mice with an inducible melanoma mouse model. We monitored the primary tumor outgrowth, metastasis, and survival of the eIF4EKI mice versus eIF4EWT mice. Melanoma samples were isolated for further investigation.
Results: Compared to the eIF4EWT mice, eIF4EKI mice exhibit significantly delayed tumor growth, reduced metastasis, and increased survival. Increased expression of MITF and downstream melanoma antigens were observed in eIF4EKI tumors, suggesting a p-eIF4E-mediated phenotype switching. Cytokine array analysis revealed a novel proinvasive cytokine signature in eIF4EWT melanoma primary culture, further supporting a role of phospho-eIF4E in phenotype switching. The cytokine profiling also revealed a pro-myeloid-derived suppressor cell (MDSC) cytokine signature in the eIF4EWT tumor, indicating a p-eIF4E-linked immunosuppression. In support of the immune suppressive cytokine signature associated with phospho-eIF4E expressing melanomas, immune phenotyping of eIF4EWT melanomas showed a significant increase in MDSCs and less cytotoxic T cells, compared to eIF4EKI melanomas. Finally, pharmacologic inhibition of p-eIF4E in combination with anti-PD-1 immunotherapy results in a synergistic delay in primary tumor outgrowth and reduced metastasis.
Conclusions: Here we showed that phosphorylation of eIF4E promotes melanoma phenotype switching, leading to increased invasiveness and reduced expression of tumor-associated antigens. Further, by increasing the secretion of pro-MDSC cytokines, p-eIF4E permits an immunosuppressive microenvironment. Pharmacologic inhibition of p-eIF4E sensitizes melanoma to anti-PD-1 immunotherapy, potentially by increasing melanoma antigen expression and compromising MDSC-mediated immunosuppression. This study provides a novel therapeutic approach for the treatment of melanoma.
Citation Format: Fan Huang, Christophe Gonçalves, Qianyu Guo, Joelle Rémy-Sarrazin, Audrey Emond, William Yang, Dany Plourde, Margarita Bartish, Jie Su, Yao Zhan, Marina G. Gimeno, Elie Khoury, Alexandre Benoit, David Dankort, Wilson H. Miller, Sonia V. del Rincón. Phosphorylation of eIF4E promotes phenotype switching and MDSC-mediated immunosuppression in melanoma [abstract]. In: Proceedings of the AACR Special Conference on Tumor Immunology and Immunotherapy; 2019 Nov 17-20; Boston, MA. Philadelphia (PA): AACR; Cancer Immunol Res 2020;8(3 Suppl):Abstract nr A53.
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Affiliation(s)
- Fan Huang
- 1Division of Experimental Medicine, McGill University, Montreal, QC, Canada,
| | - Christophe Gonçalves
- 2Segal Cancer Centre, Lady Davis Institute, Jewish General Hospital, Montreal, QC, Canada,
| | - Qianyu Guo
- 1Division of Experimental Medicine, McGill University, Montreal, QC, Canada,
| | - Joelle Rémy-Sarrazin
- 3Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada,
| | - Audrey Emond
- 2Segal Cancer Centre, Lady Davis Institute, Jewish General Hospital, Montreal, QC, Canada,
| | - William Yang
- 1Division of Experimental Medicine, McGill University, Montreal, QC, Canada,
| | - Dany Plourde
- 2Segal Cancer Centre, Lady Davis Institute, Jewish General Hospital, Montreal, QC, Canada,
| | - Margarita Bartish
- 1Division of Experimental Medicine, McGill University, Montreal, QC, Canada,
| | - Jie Su
- 2Segal Cancer Centre, Lady Davis Institute, Jewish General Hospital, Montreal, QC, Canada,
| | - Yao Zhan
- 1Division of Experimental Medicine, McGill University, Montreal, QC, Canada,
| | - Marina G. Gimeno
- 4University Veterinary Teaching Hospital Camden, Faculty of Science, University of Sydney, Sydney, NSW, Australia,
| | - Elie Khoury
- 1Division of Experimental Medicine, McGill University, Montreal, QC, Canada,
| | - Alexandre Benoit
- 1Division of Experimental Medicine, McGill University, Montreal, QC, Canada,
| | - David Dankort
- 5Department of Biology, McGill University, Montreal, QC, Canada
| | - Wilson H. Miller
- 1Division of Experimental Medicine, McGill University, Montreal, QC, Canada,
| | - Sonia V. del Rincón
- 1Division of Experimental Medicine, McGill University, Montreal, QC, Canada,
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16
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Fasano A, Aguiar M, Benoit A, Bideaud A, Bourrion O, Calvo M, Catalano A, de Taoro A, Garde G, Gomez A, Gomez Renasco M, Goupy J, Hoarau C, Hoyland R, Macías-Pérez J, Marpaud J, Monfardini A, Pisano G, Ponthieu N, Rubiño Martín J, Tourres D, Tucker C, Beelen A, Bres G, De Petris M, de Bernardis P, Lagache G, Marton M, Rebolo R, Roudier S. KISS: a spectrometric imager for millimetre cosmology. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202022800010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Clusters of galaxies are used to map the large-scale structures in the universe and as probe of universe evolution. They can be observed through the Sunyaev-Zel’dovich (SZ) effect. In this respect the spectro-imaging at low resolution frequency is an important tool, today, for the study of cluster of galaxies. We have developed KISS (KIDs Interferometer Spectrum Survey), a spectrometric imager dedicated to the secondary anisotropies of the Cosmic Microwave Background (CMB). The multi-frequency approach permits to improve the component separation with respect to predecessor experiments. In this paper, firstly, we provide a description of the scientific context and the state of the art of SZ observations. Secondly, we describe the KISS instrument. Finally, we show preliminary results of the ongoing commissioning campaign.
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17
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Benoit A, Davin L, Bruyère PJ, Lancellotti P, D'Orio V. [A rare complication of acute coronary syndrome : left ventricular pseudo-aneurysm]. Rev Med Liege 2019; 74:375-377. [PMID: 31373448] [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] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report a case of left ventricular pseudo-aneurysm and we take the opportunity to briefly review the literature concerning etiologies, diagnosis and management of this pathology, emphasizing some differences with the true aneurysm.
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Affiliation(s)
- A Benoit
- Service de Cardiologie, CHU Liège, Belgique
| | | | | | | | - V D'Orio
- Service de Cardiologie, CHU Liège, Belgique
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18
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Crenn MJ, Benoit A, Rohman G, Guilbert T, Chaussain C, Fromentin O, Attal JP, Bardet C. Additive manufactured titanium for prosthetic application in dentistry: surface topography characterization and in vitro cellular response of human gingival fibroblasts (HGFs). Comput Methods Biomech Biomed Engin 2019. [DOI: 10.1080/10255842.2020.1713467] [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: 10/24/2022]
Affiliation(s)
- M. J. Crenn
- Innovative Dental Materials and Interfaces Research Unit (URB2i), Faculty of Dental Surgery, Paris Descartes University – Paris 13 University, Montrouge, France
| | - A. Benoit
- Innovative Dental Materials and Interfaces Research Unit (URB2i), Faculty of Dental Surgery, Paris Descartes University – Paris 13 University, Montrouge, France
| | - G. Rohman
- Innovative Dental Materials and Interfaces Research Unit (URB2i), Faculty of Dental Surgery, Paris Descartes University – Paris 13 University, Montrouge, France
| | - T. Guilbert
- EA2496, Faculty of Dental Surgery, Paris Descartes University, Montrouge, France
| | - C. Chaussain
- EA2496, Faculty of Dental Surgery, Paris Descartes University, Montrouge, France
| | - O. Fromentin
- Innovative Dental Materials and Interfaces Research Unit (URB2i), Faculty of Dental Surgery, Paris Descartes University – Paris 13 University, Montrouge, France
| | - J. P. Attal
- Innovative Dental Materials and Interfaces Research Unit (URB2i), Faculty of Dental Surgery, Paris Descartes University – Paris 13 University, Montrouge, France
| | - C. Bardet
- EA2496, Faculty of Dental Surgery, Paris Descartes University, Montrouge, France
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19
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Vuillaume T, Mikael J, Antiga L, Benoit A, Lambert P, Maurin G, Silvestri G. GammaLearn - first steps to apply Deep Learning to the Cherenkov Telescope Array data. EPJ Web Conf 2019. [DOI: 10.1051/epjconf/201921406020] [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: 11/14/2022] Open
Abstract
The Cherenkov Telescope Array (CTA) is the next generation of ground-based gamma-ray telescopes for gamma-ray astronomy. Two arrays will be deployed composed of 19 telescopes in the Northern hemisphere and 99 telescopes in the Southern hemisphere.
Due to its very high sensitivity, CTA will record a colossal amount of data that represent a computing challenge to the reconstruction software. Moreover, the vast majority of triggered events come from protons that represent a background for gamma-ray astronomy.
Deep learning developments in the last few years have shown tremendous improvements in the analysis of data in many domains. Thanks to the huge amount of simulated data and later of real data, produced by CTA, these algorithms look well-suited and very promising. Moreover, the trained neural networks show very good computing performances during execution. Here we present a first study of deep learning architectures applied to CTA simulated data to perform the reconstruction of the particles energy and incoming direction and the development of a specific framework, GammaLearn, to accomplish this task.
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20
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Cheiney-Kulak C, Revol P, Durand-Dubief F, Ionescu I, Roggerone S, Benoit A, Delporte L, Roche L, Rabilloud M, Vukusic S, Rossetti Y, Jacquin-Courtois S. Fampridine-PR (prolonged released 4-aminopyridine) improves upper limb dysfunction in multiple sclerosis patients: Clinical and kinematic analysis. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.577] [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: 11/29/2022]
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Benoit A, Stojanoski B, Ray L, Zandi A, Quddus A, Comeau F, Fogel S. 0230 Mild and Acute Sleep Loss Negatively Impacts Vigilance Reflected by Reduced Neural Sensory Processing, Motor Preparation and Execution. Sleep 2018. [DOI: 10.1093/sleep/zsy061.229] [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: 11/12/2022] Open
Affiliation(s)
- A Benoit
- University of Ottawa, Ottawa, ON, CANADA
- The Royal’s Institute of Mental Health Research, Ottawa, ON, CANADA
| | | | - L Ray
- The Royal’s Institute of Mental Health Research, Ottawa, ON, CANADA
| | - A Zandi
- Alcohol Countermeasures Systems Corp., Toronto, ON, CANADA
| | - A Quddus
- Alcohol Countermeasures Systems Corp., Toronto, ON, CANADA
| | - F Comeau
- Alcohol Countermeasures Systems Corp., Toronto, ON, CANADA
| | - S Fogel
- University of Ottawa, Ottawa, ON, CANADA
- The Royal’s Institute of Mental Health Research, Ottawa, ON, CANADA
- The Brain & Mind Institute, London, ON, CANADA
- University of Ottawa Brain & Mind Research Institute, Ottawa, ON, CANADA
- University of Ottawa, Ottawa, ON, CANADA
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Saad MF, Parvaresh A, Carrier J, Lafrenière A, Bujaki B, Benoit A, Lalande S, Welch K, De Koninck JM, Douglass A, Lee E, Busby K, Robillard R. 1088 HEART RATE SLEEP PROFILE: A NEW BIOMARKER FOR DEPRESSION? Sleep 2017. [DOI: 10.1093/sleepj/zsx050.1087] [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: 11/12/2022] Open
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Ayoub P, Hétu PO, Cormier M, Benoit A, Palumbo A, Dubé MC, Gosselin S, Ghannoum M. Toxicokinetics of Metformin During Hemodialysis. Kidney Int Rep 2017; 2:759-762. [PMID: 29318220 PMCID: PMC5720532 DOI: 10.1016/j.ekir.2017.02.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 02/27/2017] [Indexed: 12/20/2022] Open
Affiliation(s)
- Paul Ayoub
- Biochemistry Department, University of Montreal Health Center, University of Montreal, Montreal, Quebec, Canada
| | - Pierre-Olivier Hétu
- Department of Nephrology, Verdun Hospital, University of Montreal, Montreal, Quebec, Canada
| | - Monique Cormier
- Department of Nephrology, Verdun Hospital, University of Montreal, Montreal, Quebec, Canada
| | - Alexandre Benoit
- Department of Nephrology, Verdun Hospital, University of Montreal, Montreal, Quebec, Canada
| | - Andrea Palumbo
- Department of Nephrology, Verdun Hospital, University of Montreal, Montreal, Quebec, Canada
| | - Marie-Claude Dubé
- Department of Nephrology, Verdun Hospital, University of Montreal, Montreal, Quebec, Canada
| | - Sophie Gosselin
- Department of Emergency Medicine, McGill University Health Centre, McGill University, Montreal, Canada
| | - Marc Ghannoum
- Department of Nephrology, Verdun Hospital, University of Montreal, Montreal, Quebec, Canada
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Sonigo C, El Hachem H, Benard J, Benoit A, Sermondade N, Grynberg M. Comparison of GnRH agonist and hCG for priming in vitro maturation (IVM) cycles in cancer patients undergoing urgent fertility preservation (FP). Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.393] [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: 10/21/2022]
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Sonigo C, Simon C, Boubaya M, Benoit A, Sifer C, Sermondade N, Grynberg M. What threshold values of antral follicle count and serum AMH levels should be considered for oocyte cryopreservation after in vitro maturation? Hum Reprod 2016; 31:1493-500. [PMID: 27165625 DOI: 10.1093/humrep/dew102] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 04/12/2016] [Indexed: 11/12/2022] Open
Abstract
STUDY QUESTION What threshold values of ultrasonographic antral follicle count (AFC) and serum anti-Müllerian hormone (AMH) levels should be considered for ensuring the cryopreservation of sufficient number of in vitro matured (IVM) oocytes, in cancer patients seeking fertility preservation (FP)? SUMMARY ANSWER AFC and serum AMH values >20 follicles and 3.7 ng/ml, respectively, are required for obtaining at least 10 IVM oocytes for cryopreservation. WHAT IS KNOWN ALREADY IVM of cumulus oocyte complexes (COCs) followed by oocyte cryopreservation has emerged recently as an option for urgent FP. Recent data have reported that, in healthy patients, 8-20 cryopreserved oocytes after ovarian stimulation would maximize the chance of obtaining a live birth. Although both AFC and AMH have been reported as predictive factors of IVM success in infertile patients with polycystic ovary syndrome (PCOS), there is a dramatic lack of data regarding the values of these parameters in oncological patients as candidates for FP. STUDY DESIGN, SIZE, DURATION From January 2009 to April 2015, we prospectively studied 340 cancer patients, aged 18-41 years, as candidates for oocyte cryopreservation following IVM. PARTICIPANTS/MATERIALS, SETTING, METHODS All patients had AFC and AMH measurements, 48-72 h before oocyte retrieval, regardless of the phase of the cycle. COCs were recovered under ultrasound guidance 36 h after hCG priming. Logistic regression allowed the determination of threshold values of AFC and AMH, for obtaining at least 8, 10 or 15 matures oocytes frozen after the IVM procedure. Similar analyses were performed for a final number of mature oocytes ≤2. MAIN RESULTS AND THE ROLE OF CHANCE Among the 340 cancer patients included, 300 were diagnosed with breast cancers, 14 had hematological malignancies and 26 underwent the procedure for others indications. Overall, the mean age of the population was 31.8 ± 4.5 years. Mean AFC and serum AMH levels were 21.7 ± 13.3 follicles and 4.4 ± 3.8 ng/ml, respectively. IVM was performed in equal proportions during the follicular or luteal phase of the cycle (49 and 51%, respectively). Statistical analysis showed that AFC and AMH values above 28 follicles and 3.9 ng/ml, 20 follicles and 3.7 ng/ml and 19 follicles and 3.5 ng/ml are required, respectively, for obtaining at least 15, 10 or 8 frozen IVM oocytes with a sensitivity ranging from 0.82 to 0.90. On the contrary, ≤2 IVM oocytes were cryopreserved when AFC and AMH were <19 follicles and 3.0 ng/ml, respectively. LIMITATIONS, REASONS FOR CAUTION Although the potential of cryopreserved IVM oocytes from cancer patients remains unknown, data obtained from infertile PCOS women have shown a dramatically reduced competence of these oocytes when compared with that of oocytes recovered after ovarian stimulation. As a consequence, the optimal number of IVM oocytes frozen in candidates for FP is currently unpredictable. WIDER IMPLICATIONS OF THE FINDINGS Cryopreservation of oocytes after IVM should be considered in the FP strategy when ovarian stimulation is unfeasible, in particular when markers of the follicular ovarian status are at a relatively high range. Further investigation is needed to objectively assess the real potential of these IVM oocytes after cryopreservation. Therefore, even when a good COCs yield is expected, we should systematically encourage IVM in combination with ovarian tissue cryopreservation. STUDY FUNDING/COMPETING INTERESTS No external funding was obtained for the present study. The authors have no conflict of interest to declare. TRIAL REGISTRATION NUMBER Not applicable.
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Affiliation(s)
- C Sonigo
- AP-HP, Service de Médecine de la Reproduction et Préservation de la Fertilité, Hôpital Jean Verdier, Avenue du 14 Juillet, Bondy 93143, France INSERM, U1185, Université Paris-Sud, Le Kremlin-Bicêtre 94270, France Université Paris XIII, Bobigny 93000, France
| | - C Simon
- AP-HP, Service de Médecine de la Reproduction et Préservation de la Fertilité, Hôpital Jean Verdier, Avenue du 14 Juillet, Bondy 93143, France
| | - M Boubaya
- Unité de Recherche Clinique, Hôpital Avicenne, Bobigny 93009, France
| | - A Benoit
- AP-HP, Service de Médecine de la Reproduction et Préservation de la Fertilité, Hôpital Jean Verdier, Avenue du 14 Juillet, Bondy 93143, France
| | - C Sifer
- AP-HP, Service de Cytogénétique et Biologie de la Reproduction, Hôpital Jean Verdier, Avenue du 14 Juillet, Bondy 93143, France
| | - N Sermondade
- AP-HP, Service de Cytogénétique et Biologie de la Reproduction, Hôpital Jean Verdier, Avenue du 14 Juillet, Bondy 93143, France
| | - M Grynberg
- AP-HP, Service de Médecine de la Reproduction et Préservation de la Fertilité, Hôpital Jean Verdier, Avenue du 14 Juillet, Bondy 93143, France Université Paris XIII, Bobigny 93000, France INSERM, U1133, Université Paris-Diderot, Paris 75013, France
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Benoit A, Thai M, Medart L, Desiron Q, Fraipont V. [AORTOENTERIC FISTULA, A POOR PROGNOSIS FINDING]. Rev Med Liege 2016; 71:233-235. [PMID: 27337841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report the case of a patient admitted with upper gastrointestinal bleeding. The CT scan revealed an aorto-duodenal fistula. This case highlights the progression of radiological imaging in parallel with the clinical course. We take this opportunity to write a brief literature review mainly focused on the description and diagnostic modalities of aortoenteric fistulas.
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Bénard J, Calvo J, Comtet M, Benoit A, Sifer C, Grynberg M. [Fertility preservation in women of the childbearing age: Indications and strategies]. ACTA ACUST UNITED AC 2016; 45:424-44. [PMID: 27021926 DOI: 10.1016/j.jgyn.2016.02.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 02/15/2016] [Accepted: 02/24/2016] [Indexed: 12/21/2022]
Abstract
Advances on cryopreservation techniques now allow considering oocyte, embryo or ovarian tissue freezing for female fertility preservation. Originally developed for patients suffering from cancer, fertility preservation has rapidly invaded others medical fields, and represents now the standard of care for all young patient diagnosed with a disease that could impair fertility or having to receive possibly gonadotoxic treatment. As a result, autoimmune diseases, some genetic pathologies or iterative pelvic surgeries, at risk of premature ovarian failure, have become common indications of fertility preservation. In addition, the social egg freezing aiming at preventing the age-related fertility decline is still debated in France, although authorized in numerous countries. This review will discuss the different strategies of fertility preservation in young girls and women of reproductive age, regarding different medical or non-medical indications.
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Affiliation(s)
- J Bénard
- Service de médecine de la reproduction, hôpital Jean-Verdier, avenue du 14-Juillet, 93140 Bondy, France; Université Paris XIII, 93000 Bobigny, France
| | - J Calvo
- Service de médecine de la reproduction, hôpital Jean-Verdier, avenue du 14-Juillet, 93140 Bondy, France
| | - M Comtet
- Service de médecine de la reproduction, hôpital Jean-Verdier, avenue du 14-Juillet, 93140 Bondy, France
| | - A Benoit
- Service de médecine de la reproduction, hôpital Jean-Verdier, avenue du 14-Juillet, 93140 Bondy, France
| | - C Sifer
- Service de cytogénétique et biologie de la reproduction, hôpital Jean-Verdier, avenue du 14-Juillet, 93140 Bondy, France
| | - M Grynberg
- Service de médecine de la reproduction, hôpital Jean-Verdier, avenue du 14-Juillet, 93140 Bondy, France; Université Paris XIII, 93000 Bobigny, France; Unité Inserm U1133, université Paris-Diderot, 75013 Paris, France.
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Sarandi S, Herbemont C, Sermondade N, Benoit A, Sonigo C, Poncelet C, Benard J, Gronier H, Boujenah J, Grynberg M, Sifer C. [A prospective study to compare the efficiency of oocyte vitrification using closed or open devices]. ACTA ACUST UNITED AC 2016; 44:280-4. [PMID: 26968255 DOI: 10.1016/j.gyobfe.2016.02.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 01/28/2016] [Indexed: 12/01/2022]
Abstract
OBJECTIVES Oocyte vitrification using an open device is thought to be a source of microbiological and chemical contaminations that can be avoided using a closed device. The principal purpose of this study was to compare the two vitrification protocols: closed and open system. The secondary aim was to study the effects of the storage in the vapor phase of nitrogen (VPN) on oocytes vitrified using an open system and to compare it to those of a storage in liquid nitrogen (LN). METHODS Forty-four patients have been included in our study between November 2014 and May 2015. Two hundred and fourteen oocytes have been vitrified at germinal vesicle (GV), metaphase I (0PB) and metaphase II (1PB) stages. We vitrified 96 oocytes (59 GV/37 0PB) using a closed vitrification device and 118 oocytes (57 GV/31 0PB/30 1PB) using an open device. The vitrified oocytes were then stored either in LN or in VPN. The main outcome measures were the survival rate after warming (SR), meiosis resumption rate (MRR) and maturation rate (MR). RESULTS The global post-thaw SR was significantly higher for oocytes vitrified using an open system (93.2%) compared to those vitrified using a closed one (64.5%; P<0.001). On the contrary, there was no significant difference in terms of global MRR and MR (82.1% vs. 87.5% and 60.7% vs. 61.2% using closed and open system respectively). The SR, MRR and the MR were not significantly different when vitrified oocytes were stored in VPN or LN (91.6, 83.8, 64.5% vs. 93.9, 89.8, 59.1% respectively). CONCLUSION Taking into account the limits of our protocol, the open vitrification system remains the more efficient system. The use of sterile liquid nitrogen for oocyte vitrification and the subsequent storage in vapor phase of nitrogen could minimize the hypothetical risks of biological and chemical contaminations.
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Affiliation(s)
- S Sarandi
- Service d'histologie-embryologie-cytogénétique-biologie de la reproduction-CECOS, centre hospitalier universitaire Jean-Verdier, avenue du 14-Juillet, 93140 Bondy, France
| | - C Herbemont
- Service d'histologie-embryologie-cytogénétique-biologie de la reproduction-CECOS, centre hospitalier universitaire Jean-Verdier, avenue du 14-Juillet, 93140 Bondy, France; UFR SMBH, université Paris 13, Sorbonne Paris cité, 93000 Bobigny, France
| | - N Sermondade
- Service d'histologie-embryologie-cytogénétique-biologie de la reproduction-CECOS, centre hospitalier universitaire Jean-Verdier, avenue du 14-Juillet, 93140 Bondy, France
| | - A Benoit
- Service de médecine de la reproduction, centre hospitalier universitaire Jean-Verdier, 93140 Bondy, France
| | - C Sonigo
- Service de médecine de la reproduction, centre hospitalier universitaire Jean-Verdier, 93140 Bondy, France
| | - C Poncelet
- UFR SMBH, université Paris 13, Sorbonne Paris cité, 93000 Bobigny, France; Service de médecine de la reproduction, centre hospitalier universitaire Jean-Verdier, 93140 Bondy, France
| | - J Benard
- UFR SMBH, université Paris 13, Sorbonne Paris cité, 93000 Bobigny, France; Service de médecine de la reproduction, centre hospitalier universitaire Jean-Verdier, 93140 Bondy, France
| | - H Gronier
- Service de médecine de la reproduction, centre hospitalier universitaire Jean-Verdier, 93140 Bondy, France
| | - J Boujenah
- UFR SMBH, université Paris 13, Sorbonne Paris cité, 93000 Bobigny, France; Service de médecine de la reproduction, centre hospitalier universitaire Jean-Verdier, 93140 Bondy, France
| | - M Grynberg
- UFR SMBH, université Paris 13, Sorbonne Paris cité, 93000 Bobigny, France; Service de médecine de la reproduction, centre hospitalier universitaire Jean-Verdier, 93140 Bondy, France
| | - C Sifer
- Service d'histologie-embryologie-cytogénétique-biologie de la reproduction-CECOS, centre hospitalier universitaire Jean-Verdier, avenue du 14-Juillet, 93140 Bondy, France; UFR SMBH, université Paris 13, Sorbonne Paris cité, 93000 Bobigny, France.
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Mignacca L, Saint-Germain E, Benoit A, Bourdeau V, Moro A, Ferbeyre G. Sponges against miR-19 and miR-155 reactivate the p53-Socs1 axis in hematopoietic cancers. Cytokine 2016; 82:80-6. [PMID: 26841929 DOI: 10.1016/j.cyto.2016.01.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [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: 10/01/2015] [Revised: 01/23/2016] [Accepted: 01/25/2016] [Indexed: 12/26/2022]
Abstract
Normal cell proliferation is controlled by a balance between signals that promote or halt cell proliferation. Micro RNAs are emerging as key elements in providing fine signal balance in different physiological situations. Here we report that STAT5 signaling induces the miRNAs miR-19 and miR-155, which potentially antagonize the tumor suppressor axis composed by the STAT5 target gene SOCS1 (suppressor of cytokine signaling-1) and its downstream effector p53. MiRNA sponges against miR-19 or miR-155 inhibit the functions of these miRNAs and potentiate the induction of SOCS1 and p53 in mouse leukemia cells and in human myeloma cells. Adding a catalytic RNA motif of the hammerhead type within miRNA sponges against miR-155 leads to decreased miR-155 levels and increased their ability of inhibiting cell growth and cell migration in myeloma cells. The results indicate that antagonizing miRNA activity can reactivate tumor suppressor pathways downstream cytokine stimulation in tumor cells.
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Affiliation(s)
- Lian Mignacca
- Département de biochimie et médecine moléculaire, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Emmanuelle Saint-Germain
- Département de biochimie et médecine moléculaire, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Alexandre Benoit
- Département de biochimie et médecine moléculaire, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Véronique Bourdeau
- Département de biochimie et médecine moléculaire, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Alejandro Moro
- Département de biochimie et médecine moléculaire, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Gerardo Ferbeyre
- Département de biochimie et médecine moléculaire, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec H3C 3J7, Canada.
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Tridetti J, Benoit A, Borgoens P, Hoffer E. [CARDIOVASCULAR INVOLVEMENTS IN BEHÇET'S DISEASE: "ANGIO-BEHÇET"]. Rev Med Liege 2016; 71:22-27. [PMID: 26983310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Behçet's disease is a relapsing, immune-mediated systemic vasculitis that may affect blood vessels of all types and sizes. Nowadays, the etiology remains unclear. In the absence of a biological marker or pathognomonic radiology, the diagnosis is mainly based on clinical manifestations. The cardiovascular involvement, known as "angio-Behçet", is relatively common and affects up to 40% of patients. It typi- cally occurs in a young male, usually during the onset of the disease. In general, immunosuppressive and anticoagulant therapies initiated early are likely to induce a remarkable cli- nical improvement. Nevertheless, prompt recognition of the polymorphous cardiovascular manifestations of the disease is challenging and may be responsible for some considerable delay prior to initiation of adequate therapy. The aim of this article is to describe the spectrum of cardiovascular involve- ments of Behçet's disease in order to optimize detection and therapeutic management.
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Benoit A, Paolucci M, Stefan L, Vanderperren O, Hoffer E. [A CASE OF FLECAINIDE INTOXICATION]. Rev Med Liege 2015; 70:442-445. [PMID: 26638444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Flecainide acetate is an antiarrhythmic agent commonly used in clinical practice, in particular, for the treatment of supraventricular tachycardias. We report a rare case of voluntary poisoning by flecainide. The patient was successfully resuscitated.A review of the literature related to this type of intoxication is presented.
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Benoit A, Mustafy T, Londono I, Beaudry F, Vachon P, Grimard G, Aubin CE, Villemure I. Histomorphometry of the newly formed bone after its growth modulation by static and dynamic compression using a rat tail model. Comput Methods Biomech Biomed Engin 2015; 18 Suppl 1:1884-5. [PMID: 26292155 DOI: 10.1080/10255842.2015.1069554] [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] [Indexed: 10/23/2022]
Affiliation(s)
- A Benoit
- a International Associated Laboratory in Biomechanics of Spine Injuries & Pathologies.,b Ecole Polytechnique, Department of Mechanical Engineering , Succursale Centre Ville , Montreal , Canada.,c St Justine University Hospital Center, Research Center , Montreal , Canada
| | - T Mustafy
- b Ecole Polytechnique, Department of Mechanical Engineering , Succursale Centre Ville , Montreal , Canada.,c St Justine University Hospital Center, Research Center , Montreal , Canada
| | - I Londono
- c St Justine University Hospital Center, Research Center , Montreal , Canada
| | - F Beaudry
- d Faculté de médecine vétérinaire, Département de biomédecine vétérinaire , Université de Montréal , Saint-Hyacinthe , Canada
| | - P Vachon
- d Faculté de médecine vétérinaire, Département de biomédecine vétérinaire , Université de Montréal , Saint-Hyacinthe , Canada
| | - G Grimard
- c St Justine University Hospital Center, Research Center , Montreal , Canada
| | - C-E Aubin
- a International Associated Laboratory in Biomechanics of Spine Injuries & Pathologies.,b Ecole Polytechnique, Department of Mechanical Engineering , Succursale Centre Ville , Montreal , Canada.,c St Justine University Hospital Center, Research Center , Montreal , Canada
| | - I Villemure
- b Ecole Polytechnique, Department of Mechanical Engineering , Succursale Centre Ville , Montreal , Canada.,c St Justine University Hospital Center, Research Center , Montreal , Canada
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Brescia L, Benoit A, Betea D, Delvenne P, Hamoir E, Beckers A. [Amiodarone and the thyroid]. Rev Med Liege 2014; 69:549-554. [PMID: 25796749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Amiodarone is an antiarrhythmic agent among the I most powerful and the most frequently used for the control of recurrent ventricular tachycardia and the secondary prevention of recurrent atrial fibrillation. Its use is not without risk. Although highly effective, it may induce various, sometimes severe, side effects, particularly at the thyroid level.In patients receiving amiodarone, one can encounter biological changes without clinical repercussion. Some may present a true thyroid disease, either hyper- or hypothyroidism. In this literature review, we will see how to prevent, diagnose, and treat these complications,if required.
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Sifer C, Sellam O, Sermondade N, Sonigo C, Hugues JN, Benoit A, Poncelet C, Grynberg M. Prospective study comparing survival and meiotic resumption rates of immature oocytes from in vitro maturation and stimulated cycles in cancer patients. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.565] [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: 11/16/2022]
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Benoit A, Davin L, Gach O, Camus B, D'Orio V, Piérard L. [How I explore a case of suspected arrhythmogenic right ventricular dysplasia]. Rev Med Liege 2014; 69:504-509. [PMID: 25796759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Arrhythmogenic right ventricular dysplasia is a rare, but not exceptional pathology combining the occurrence of potentially fatal arrhythmias with a gradual deterioration of the structure and function of the right ventricle. In this article, we discuss the etiopathology of the disease and emphasize the diagnostic approach.
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Thouny R, Benoit A, Gach O. [Image of the month: Ventricular pseudoaneurysm secondary to gunshot wound]. Rev Med Liege 2014; 69:409-411. [PMID: 25158380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
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Benoit A, Jerusalem G, Gennigens C. [Clinical case of the month. Ovarian cancer metastasis to the pectoral muscle]. Rev Med Liege 2013; 68:557-561. [PMID: 24396968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report the case of a patient with a sero-papillary ovarian cancer and a pectoral muscle metastasis. Muscular metastases are more common than previously suspected; any physician could encounter this type of case in his daily practice. This paper summarizes the literature on the subject.
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Roberge P, Fournier L, Brouillet H, Benoit A. 085 Implementing a Knowledge Application Program for Anxiety and Depression in Community-Based Primary Mental Health Care: The Clinical Decision Support Component. BMJ Qual Saf 2013. [DOI: 10.1136/bmjqs-2013-002293.116] [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: 11/03/2022]
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Belounis A, Nyalendo C, Cournoyer S, Hadj-Mimoune S, Benoit A, Lasalle E, Girard J, Beaunoyer M, Teira P, Sartelet H. Abstract 3774: Regulation of the pro-invasive properties of neuroblastoma-stem cells by membrane type-1 matrix metalloproteinase. Cancer Res 2013. [DOI: 10.1158/1538-7445.am2013-3774] [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] [Indexed: 11/16/2022]
Abstract
Abstract
Neuroblastoma (NB) is an aggressive childhood cancer that represents the leading cause of cancer deaths in children. Despite aggressive therapy, more than half of the children with advanced NB usually die because of uncontrolled metastatic disease. In order to develop new therapeutic strategies to limit NB's metastatic potential, it is crucial to identify key molecular targets governing the invasive process. The study of Cancer stem cells (CSCs) may be of interest in this regard because after chemotherapy, CSCs persist in tumors and cause relapse and metastasis. We had recently demonstrated that CD133 allowed to detect CSCs in NB. Membrane type-1 matrix metalloproteinase (MT1-MMP) is important in the metastatic process and its expression was correlated with unfavourable outcome in NBs. Our preliminary data had indicated that MT1-MMP was highly expressed in CD133high NB.
The purpose of this study is to characterize the interaction between CD133 and MT1-MMP in NB and determinate the role of MT1-MMP in pro-invasive properties of CSCs. We constructed paraffin-embedded blocks of tissue microarrays (TMA) from 235 patients. In vitro experiments were performed on four established NB cell lines (SK-N-DZ, SK-N-FI and SK-N-SH and SJNB-10). We performed immunohistochemical studies on paraffin-embedded TMA sections with two antibodies (CD133, MT1-MMP). To verify correlation of expression of MT1-MMP and CD133, we realized western blot and immunofluorescence (IF) of both proteins in non treated versus treated NB cell lines. CD133high NB cells were isolated by flow cytometry. CD133high and CD133low NB cells were grown within a 3D collagen matrix and the cell migration assay was tested in collagen-coated transwells. All experiments were performed with or without an anti-MT1-MMP neutralizing antibody or GM6001, a broad-spectrum MMP inhibitor.
To assess the interaction between CD133 and MT1-MMP, lysates were subjected to immunoprecipitation (IP) using an anti-CD133 antibody, followed by immunodetection with an anti-MT1-MMP antibody. Finally, we determined which domain of MT1-MMP is involved in its interaction with CD133. Different dominant negative mutants of MT1-MMP (catalytically inactive E240A, cytoplasmic domain-deleted CΔ20 and non-phosphorylatable Y573F) were transfected into NB cells followed by an IP.
There is a correlation between MT1-MMP and CD133 expressions in tumors of patients and in cell lines. Cells selected after chemotherapy express both CD133 and MT1-MMP. CD133high cells presented higher migration and invasion properties than CD133low which were MT1-MMP dependent. IF and IP showed a colocalization and interaction between CD133 and MT1-MMP. The cytoplasmic domain of MT1-MMP seems to be responsible for the interaction with CD133.
These results contribute to a better understanding CSCs properties in NB and may be of great interest to improve new therapeutic strategies.
Citation Format: Assila Belounis, Carine Nyalendo, Sonia Cournoyer, Sarah Hadj-Mimoune, Alexandre Benoit, Elliot Lasalle, Jonathan Girard, Mona Beaunoyer, Pierre Teira, Hervé Sartelet. Regulation of the pro-invasive properties of neuroblastoma-stem cells by membrane type-1 matrix metalloproteinase. [abstract]. In: Proceedings of the 104th Annual Meeting of the American Association for Cancer Research; 2013 Apr 6-10; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2013;73(8 Suppl):Abstract nr 3774. doi:10.1158/1538-7445.AM2013-3774
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Roggerone S, Marignier R, Durand-Dubief F, Chenevier F, Benoit A, Vukusic S, Confavreux C. Lésions encéphaliques cavitaires profuses au cours d’une aquaporinopathie auto-immune. Rev Neurol (Paris) 2013. [DOI: 10.1016/j.neurol.2013.01.273] [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: 11/29/2022]
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Benoit A, Bouquegneau A, Petrossians P, Beckers A. [Malabsorption of thyroid hormones ... or simply poor patient compliance?]. Rev Med Liege 2013; 68:118-121. [PMID: 23614319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report the case of a patient presenting with L-thyroxine pseudomalabsorbtion, a figure in which patients are in a state of biological, and, frequently, clinical hypothyroidism secondary to a lack of adherence to substitutive thyroid treatment. We then review the different causes of true thyroid hormones malabsorption and the different approaches to these situations. We also suggest diagnostic and therapeutic attitudes for clinicians facing suspicious cases of hormone malabsorption.
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Ryan E, Blake AJ, Benoit A, David MF, Robert AK. Efficacy of substituted 9-aminoacridine derivatives in small cell lung cancer. Invest New Drugs 2012; 31:285-92. [DOI: 10.1007/s10637-012-9854-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Accepted: 07/09/2012] [Indexed: 12/26/2022]
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Abstract
A novel method for color image enhancement is proposed as an extension of the scalar-diffusion-shock-filter coupling model, where noisy and blurred images are denoised and sharpened. The proposed model is based on using the single vectors of the gradient magnitude and the second derivatives as a manner to relate different color components of the image. This model can be viewed as a generalization of the Bettahar-Stambouli filter to multivalued images. The proposed algorithm is more efficient than the mentioned filter and some previous works at color images denoising and deblurring without creating false colors.
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Affiliation(s)
- Salim Bettahar
- Department of Electronics, Faculty of Electronics and Electrical Engineering, University of Sciences and Technology of Oran, Oran, Algeria.
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Lepage M, Sergerie K, Benoit A, Czechowska Y, Dickie E, Armony JL. Emotional face processing and flat affect in schizophrenia: functional and structural neural correlates. Psychol Med 2011; 41:1833-1844. [PMID: 21284912 DOI: 10.1017/s0033291711000031] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND There is a general consensus in the literature that schizophrenia causes difficulties with facial emotion perception and discrimination. Functional brain imaging studies have observed reduced limbic activity during facial emotion perception but few studies have examined the relation to flat affect severity. METHOD A total of 26 people with schizophrenia and 26 healthy controls took part in this event-related functional magnetic resonance imaging study. Sad, happy and neutral faces were presented in a pseudo-random order and participants indicated the gender of the face presented. Manual segmentation of the amygdala was performed on a structural T1 image. RESULTS Both the schizophrenia group and the healthy control group rated the emotional valence of facial expressions similarly. Both groups exhibited increased brain activity during the perception of emotional faces relative to neutral ones in multiple brain regions, including multiple prefrontal regions bilaterally, the right amygdala, right cingulate cortex and cuneus. Group comparisons, however, revealed increased activity in the healthy group in the anterior cingulate, right parahippocampal gyrus and multiple visual areas. In schizophrenia, the severity of flat affect correlated significantly with neural activity in several brain areas including the amygdala and parahippocampal region bilaterally. CONCLUSIONS These results suggest that many of the brain regions involved in emotional face perception, including the amygdala, are equally recruited in both schizophrenia and controls, but flat affect can also moderate activity in some other brain regions, notably in the left amygdala and parahippocampal gyrus bilaterally. There were no significant group differences in the volume of the amygdala.
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Affiliation(s)
- M Lepage
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Verdun, Québec, Canada.
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Raza A, Jacobson BA, Patel M, Benoit A, Jay-Dixon J, Ferguson DM, Kratzke RA. The effect of novel acridine-based agents with topoisomerase II inhibitor on mesothelioma cell proliferation and apoptosis. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e13507] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Benoit A, Reman O, D’Alche-Gautier M. Coût du séjour hospitalier d’allogreffe de cellules souches hématopoïétiques au centre hospitalier universitaire de Caen. Rev Epidemiol Sante Publique 2008. [DOI: 10.1016/j.respe.2008.02.073] [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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Yates SJC, Benoit A, Grémion E, Ulysse C, Camus P, Cavanna A, Durand T, Etienne B, Gennser U, Hoffmann C, Leclercq S, Jin Y. Use of quantum-point-contact high-electron-mobility-transistors for time domain multiplexing of large arrays of high impedance low temperature bolometers. Rev Sci Instrum 2007; 78:035104. [PMID: 17411214 DOI: 10.1063/1.2712912] [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] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The use of a multiplexing readout for an array of bolometers simplifies the electronics and wiring, so making the readout of large arrays of bolometers (>100) feasible. Here we describe a time domain multiplexing technique and its performance based on the use of quantum-point-contact high-electron-mobility-transistors as low temperature (to approximately 100 mK) switches for measuring high impedance (5...70 MOmega) resistances and sensors. The presented system is well matched to ground based millimetric astronomy demands.
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Affiliation(s)
- S J C Yates
- CNRS-CRTBT, 25 Rue des Martyrs, Boîte Postale 166, 38042 Grenoble Cedex 9, France.
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Benoit A, Huang Y, Proctor J, Rowden G, Anderson R. Effects of alveolar macrophage depletion on liposomal vaccine protection against respiratory syncytial virus (RSV). Clin Exp Immunol 2006; 145:147-54. [PMID: 16792685 PMCID: PMC1941998 DOI: 10.1111/j.1365-2249.2006.03114.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Little is known about the identities and roles of antigen-presenting cells upon exposure to antigens of respiratory syncytial virus (RSV). Here, we focused on elucidating the importance of alveolar macrophages in conferring protective immunity in mice administered a liposome-encapsulated recombinant fragment of the RSV G protein. Mice were depleted of alveolar macrophages by intranasal inoculation of liposome-encapsulated dichloromethylenediphosphonic acid (DMDP). Mice depleted of alveolar macrophages prior to immunization developed reduced levels of serum RSV-neutralizing antibody and showed dramatically impaired protection against RSV challenge. The severity of interstitial inflammation was also markedly reduced in macrophage-depleted mice. In conclusion, this study demonstrates a pivotal role for alveolar macrophages during exposure to liposome-encapsulated RSV antigen in initiating both protective and histopathological responses against RSV.
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Affiliation(s)
- A Benoit
- Departments of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
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Benoit A, Vargas MA, Desgroseillers L, Boileau G. Endothelin-converting enzyme-like 1 (ECEL1) is present both in the plasma membrane and in the endoplasmic reticulum. Biochem J 2004; 380:881-8. [PMID: 14992683 PMCID: PMC1224203 DOI: 10.1042/bj20040215] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2004] [Accepted: 03/01/2004] [Indexed: 11/17/2022]
Abstract
Enzymes of the M13 family of zinc-containing endopeptidases are recognized as important regulators of neuropeptide and peptide hormone activity. Peptidases of this family are type II integral-membrane proteins characterized by short cytosolic domains and large extracellular domains containing the active site. The M13 family has, at present, seven members, including ECEL1 (endothelin-converting enzyme-like 1), one of the newest members. ECEL1 is expressed predominantly in the central nervous system. It has been proposed that the enzyme has a role in the nervous regulation of the respiratory system. No physiological substrate has been identified yet. To better understand the function(s) of this enzyme, we have expressed human ECEL1 in cultured cells and monitored its biosynthesis and subcellular localization. Immunoblot and cell-surface biotinylation analysis of transfected cells expressing ECEL1 showed that only a fraction of the protein travelled to the cell surface, while most of the enzyme was present in an intracellular compartment identified by confocal immunofluorescence microscopy and cell fractionation as the ER (endoplasmic reticulum). Pulse-chase experiments showed that ER-localized ECEL1 was stable, with a half-life of more than 3 h. Endogenous ECEL1 from mouse pituitary gland had a similar distribution between the cell surface and the ER. Finally, using domain-swapping experiments with neprilysin, another member of the M13 family, we showed that localization of ECEL1 to the ER requires both the transmembrane and cytoplasmic domains. It thus appears that ECEL1 may have functions both at the cell surface and in the ER.
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Affiliation(s)
- Alexandre Benoit
- Département de Biochimie, Faculté de Médecine, Université de Montréal, Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Qc, Canada H3C 3J7
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Bergametti F, Prigent S, Luber B, Benoit A, Tiollais P, Sarasin A, Transy C. The proapoptotic effect of hepatitis B virus HBx protein correlates with its transactivation activity in stably transfected cell lines. Oncogene 1999; 18:2860-71. [PMID: 10362257 DOI: 10.1038/sj.onc.1202643] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The role of hepatitis B virus HBx protein in the carcinogenesis associated with chronic viral infection remains ill-defined. Indeed, pleiotropic effects have been ascribed to HBx: in addition to its well-documented ability to indirectly stimulate transcription, the protein has been reported to affect cell growth, signal transduction, DNA repair and apoptosis. In this work, we generated Chang (CCL-13)-derived cell lines constitutively expressing wild type or mutant HBx, as a model of HBx-host cell interaction closer to the chronic infection setting, than the classically used transient expression systems. We document the potentiation by HBx of the apoptotic cell death pathway in the recipient cells. This effect is unlikely to rely on p53 activity since the protein is functionally inactivated in CCL-13. In addition, antioxidants and cyclosporin A failed to reduce the apoptotic response back to the normal level, suggesting that production of reactive oxygen species and calcineurin activation are not directly involved in the proapoptotic effect of HBx. In contrast, our data show that transactivation and stimulation of apoptosis are tightly linked HBx activities. Finally, expression of transactivation-active protein did not result in detectable change in the pattern of MAP kinases phosphorylation nor did it affect the ability of the host cell to repair in vitro irradiated plasmid DNA.
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Affiliation(s)
- F Bergametti
- Unité de Recombinaison et Expression Génétique (INSERM U163), Institut Pasteur, Paris, France
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