169 results on '"Pengam A"'
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2. Un modèle sémantique topologique pour l’étude des processus sociaux. Les dynamiques – étapes et frontières – de la radicalisation dans les discours politiques français
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Manon PENGAM and Agata JACKIEWICZ
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sémantique ,processus ,discours institutionnels ,topologie ,radicalisation ,Language and Literature - Abstract
L’article présente un modèle sémantique d’inspiration topologique destiné à apprécier la construction du sens des processus sociaux, tels que la radicalisation djihadiste. Deux notions sémantiques, issues de Desclés (2012), sont particulièrement développées : le Schème des Représentations Quasi-Topologiques (SRQT) et la « frontière épaisse ». Nous cherchons à saisir, par le relevé de marques langagières typiques des processus (aller vers, rester, sortir…) les étapes et les mécanismes de passage entre états (non-radicalisé/radicalisé), tels qu’ils sont représentés par la parole politique en France (2013-2018). Nous analysons pour cela un corpus de déclarations publiques (2 millions de mots) de façon quantitative (tri d’énoncés pertinents par coocurrences et grammaires locales à l’aide du logiciel TXM), et qualitative par l’observation fine du corpus.
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- 2023
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3. The correlation between prenatal ultrasound and MRI in isolated periventricular pseudocysts: Analysis of 10 years’ experience at the University Hospital of Angers
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Pengam, Alisée, Delorme, Benoit, Boussion, Françoise, Van Bogaert, Patrick, Bouet, Pierre-Emmanuel, and Loisel, Didier
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- 2023
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4. P118 Rare CFTR variants: knowing them to target them more successfully
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Chiron, R., primary, Coudrat, A., additional, Ronayette, A., additional, Sonnet, L., additional, Bareil, C., additional, Sasorith, S., additional, Abely, M., additional, Audousset, C., additional, Auffret, M., additional, Blondé, A., additional, Bluteau, C., additional, Bui, S., additional, Choubrac, C., additional, De Carli, P., additional, Delattre, C., additional, Dufeu, N., additional, Gueganton, L., additional, Hamidfar, R., additional, Ka, A., additional, Leroy, S., additional, Martin, C., additional, Mazur, S., additional, Orsero, S., additional, Pengam, J., additional, Quentin, J., additional, Ramel, S., additional, Raynal, C., additional, Reix, P., additional, Roussey-Bihouée, T., additional, Savadogo, M., additional, Tembely, D., additional, Thouvenin, G., additional, and Wizla, N., additional
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- 2024
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5. Les cahiers citoyens du grand débat national (2019) : d’un geste présidentiel dépolitisant à une (re)politisation citoyenne
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Pengam, Manon, primary
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- 2024
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6. Moderate intensity continuous versus high intensity interval training: Metabolic responses of slow and fast skeletal muscles in rat.
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Morgane Pengam, Christelle Goanvec, Christine Moisan, Bernard Simon, Gaëlle Albacète, Annie Féray, Anthony Guernec, and Aline Amérand
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Medicine ,Science - Abstract
The healthy benefits of regular physical exercise are mainly mediated by the stimulation of oxidative and antioxidant capacities in skeletal muscle. Our understanding of the cellular and molecular responses involved in these processes remain often uncomplete particularly regarding muscle typology. The main aim of the present study was to compare the effects of two types of exercise training protocol: a moderate-intensity continuous training (MICT) and a high-intensity interval training (HIIT) on metabolic processes in two muscles with different typologies: soleus and extensor digitorum longus (EDL). Training effects in male Wistar rats were studied from whole organism level (maximal aerobic speed, morphometric and systemic parameters) to muscle level (transcripts, protein contents and enzymatic activities involved in antioxidant defences, aerobic and anaerobic metabolisms). Wistar rats were randomly divided into three groups: untrained (UNTR), n = 7; MICT, n = 8; and HIIT, n = 8. Rats of the MICT and HIIT groups ran five times a week for six weeks at moderate and high intensity, respectively. HIIT improved more than MICT the endurance performance (a trend to increased maximal aerobic speed, p = 0.07) and oxidative capacities in both muscles, as determined through protein and transcript assays (AMPK-PGC-1α signalling pathway, antioxidant defences, mitochondrial functioning and dynamics). Whatever the training protocol, the genes involved in these processes were largely more significantly upregulated in soleus (slow-twitch fibres) than in EDL (fast-twitch fibres). Solely on the basis of the transcript changes, we conclude that the training protocols tested here lead to specific muscular responses.
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- 2023
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7. Concerted BAG3 and SIRPα blockade impairs pancreatic tumor growth
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De Marco, Margot, Gauttier, Vanessa, Pengam, Sabrina, Mary, Caroline, Ranieri, Bianca, Basile, Anna, Festa, Michela, Falco, Antonia, Reppucci, Francesca, Cammarota, Anna Lisa, Acernese, Fausto, De Laurenzi, Vincenzo, Sala, Gianluca, Brongo, Sergio, Miyasaka, Masayuki, Shalapour, Shabnam, Vanhove, Bernard, Poirier, Nicolas, Iaccarino, Roberta, Karin, Michael, Turco, Maria Caterina, Rosati, Alessandra, and Marzullo, Liberato
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- 2022
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8. Concerted BAG3 and SIRPα blockade impairs pancreatic tumor growth
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Margot De Marco, Vanessa Gauttier, Sabrina Pengam, Caroline Mary, Bianca Ranieri, Anna Basile, Michela Festa, Antonia Falco, Francesca Reppucci, Anna Lisa Cammarota, Fausto Acernese, Vincenzo De Laurenzi, Gianluca Sala, Sergio Brongo, Masayuki Miyasaka, Shabnam Shalapour, Bernard Vanhove, Nicolas Poirier, Roberta Iaccarino, Michael Karin, Maria Caterina Turco, Alessandra Rosati, and Liberato Marzullo
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Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 ,Cytology ,QH573-671 - Abstract
Abstract The BAG3- and SIRPα- mediated pathways trigger distinct cellular targets and signaling mechanisms in pancreatic cancer microenvironment. To explore their functional connection, we investigated the effects of their combined blockade on cancer growth in orthotopic allografts of pancreatic cancer mt4–2D cells in immunocompetent mice. The anti-BAG3 + anti-SIRPα mAbs treatment inhibited (p = 0.007) tumor growth by about the 70%; also the number of metastatic lesions was decreased, mostly by the effect of the anti-BAG3 mAb. Fibrosis and the expression of the CAF activation marker α-SMA were reduced by about the 30% in animals treated with anti-BAG3 mAb compared to untreated animals, and appeared unaffected by treatment with the anti-SIRPα mAb alone; however, the addition of anti-SIRPα to anti-BAG3 mAb in the combined treatment resulted in a > 60% (p
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- 2022
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9. A semantic topologic guideline for study of social processes. Dynamics–steps and borders–of radicalization in French political speeches
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PENGAM, Manon, primary and JACKIEWICZ, Agata, additional
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- 2023
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10. Moderate intensity continuous versus high intensity interval training: Metabolic responses of slow and fast skeletal muscles in rat
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Pengam, Morgane, primary, Goanvec, Christelle, additional, Moisan, Christine, additional, Simon, Bernard, additional, Albacète, Gaëlle, additional, Féray, Annie, additional, Guernec, Anthony, additional, and Amérand, Aline, additional
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- 2023
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11. SIRPα/CD47 axis controls the maintenance of transplant tolerance sustained by myeloid-derived suppressor cells
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Pengam, Sabrina, Durand, Justine, Usal, Claire, Gauttier, Vanessa, Dilek, Nahzli, Martinet, Bernard, Daguin, Véronique, Mary, Caroline, Thepenier, Virginie, Teppaz, Géraldine, Renaudin, Karine, Blancho, Gilles, Vanhove, Bernard, and Poirier, Nicolas
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- 2019
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12. IL-7 receptor blockade blunts antigen-specific memory T cell responses and chronic inflammation in primates
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Lyssia Belarif, Caroline Mary, Lola Jacquemont, Hoa Le Mai, Richard Danger, Jeremy Hervouet, David Minault, Virginie Thepenier, Veronique Nerrière-Daguin, Elisabeth Nguyen, Sabrina Pengam, Eric Largy, Arnaud Delobel, Bernard Martinet, Stéphanie Le Bas-Bernardet, Sophie Brouard, Jean-Paul Soulillou, Nicolas Degauque, Gilles Blancho, Bernard Vanhove, and Nicolas Poirier
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Science - Abstract
Chronic inflammation often involves reactivation of memory adaptive immune. Here the authors show, using non-human primate models, that a single dose of anti-IL-7 receptor monoclonal antibody that exhibits antagonist but not agonist properties can reduce the frequency of antigen-specific T cell to help repress chronic skin inflammation.
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- 2018
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13. Effect of personalized moderate exercise training on Wistar rats fed with a fructose enriched water
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Julie Dupas, Annie Feray, Anthony Guernec, Morgane Pengam, Manon Inizan, François Guerrero, Jacques Mansourati, and Christelle Goanvec
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Metabolic syndrome ,Fructose enriched water rat model ,Aerobic training ,Nutrition. Foods and food supply ,TX341-641 ,Nutritional diseases. Deficiency diseases ,RC620-627 - Abstract
Abstract Background Metabolic Syndrom has become a public health problem. It mainly results from the increased consumption of fat and sugar. In this context, the benefits of personalized moderate exercise training were investigated on a metabolic syndrome male wistar rat model food with fructose drinking water (20–25% w/v). Different markers including body weight, metabolic measurements, blood biochemistry related to metabolic syndrome complications have been evaluated. Methods Male Wistar rats were randomly allocated to 4 groups: control (sedentary (C, n = 8) and exercise trained (Ex, n = 8)), fructose fed (sedentary (FF, n = 8) and exercise trained fructose fed rats (ExFF, n = 10)). ExFF and Ex rats were trained at moderate intensity during the last 6 weeks of the 12 weeks-long protocol of fructose enriched water. Metabolic control was determined by measuring body weight, fasting blood glucose, HOMA 2-IR, HIRI, MISI, leptin, adiponectin, triglyceridemia and hepatic dysfunction. Results After 12 weeks of fructose enriched diet, rats displayed on elevated fasting glycaemia and insulin resistance. A reduced food intake, as well as increased body weight, total calorie intake and heart weight were also observed in FF group. Concerning biochemical markers, theoretical creatinine clearance, TG levels and ASAT/ALAT ratio were also affected, without hepatic steatosis. Six weeks of 300 min/week of moderate exercise training have significantly improved overweight, fasting glycaemia, HOMA 2-IR, MISI without modify HIRI. Exercise also decreased the plasma levels of leptin, adiponectin and the ratio leptin/adiponectin. Regarding liver function and dyslipidemia, the results were less clear as the effects of exercise and fructose-enriched water interact together, and, sometimes counteract each other. Conclusion Our results indicated that positive health effects were achieved through a personalized moderate training of 300 min per week (1 h/day and 5 days/week) for 6 weeks. Therefore, regular practice of aerobic physical exercise is an essential triggering factor to attenuate MetS disorders induced by excessive fructose consumption.
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- 2018
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14. First-in-Human Study in Healthy Subjects with the Noncytotoxic Monoclonal Antibody OSE-127, a Strict Antagonist of IL-7Rα
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Nicolas Poirier, Irène Baccelli, Lyssia Belarif, Riad Abès, Géraldine Teppaz, Caroline Mary, Sonia Poli, Claudia Fromond, Isabelle Girault, Sabrina Pengam, Emilienne Soma, Fanny De Sa, Jean-Pascal Conduzorgues, Cécile Braudeau, Regis Josien, Bram Volckaert, Dominique Costantini, and Frédérique Corallo
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Immunology ,Immunology and Allergy - Abstract
OSE-127 is a humanized mAb targeting the IL-7Rα-chain (CD127), under development for inflammatory and autoimmune disease treatment. It is a strict antagonist of the IL-7R pathway, is not internalized by target cells, and is noncytotoxic. In this work, a first-in-human, phase I, randomized, double-blind, placebo-controlled, single-center study was carried out to determine the safety, pharmacokinetics, pharmacodynamics, and immunogenicity of OSE-127 administration. Sixty-three healthy subjects were randomly assigned to nine groups: six single ascending dose groups with i.v. administration (0.002–10 mg/kg), a single s.c. treatment group (1 mg/kg), and two double i.v. injection groups (6 or 10 mg/kg). Subjects were followed during 100 d after two i.v. infusions at 10 mg/kg. IL-7 consumption was inhibited by OSE-127 administration, as demonstrated by a decreased IL-7 pathway gene signature in peripheral blood cells and by ex vivo T lymphocyte restimulation experiments. OSE-127 was well tolerated, with no evidence of cytokine-release syndrome and no significant alteration of blood lymphocyte counts or subset populations. Altogether, the observed lack of significant lymphopenia or serious adverse events, concomitant with the dose-dependent inhibition of IL-7 consumption by target cells, highlights that OSE-127 may show clinical activity in IL-7R pathway–involved diseases.
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- 2023
15. IL-7 receptor influences anti-TNF responsiveness and T cell gut homing in inflammatory bowel disease
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Belarif, Lyssia, Danger, Richard, Kermarrec, Laetitia, Nerriere-Daguin, Veronique, Pengam, Sabrina, Durand, Tony, Mary, Caroline, Kerdreux, Elise, Gauttier, Vanessa, Kucik, Aneta, Thepenier, Virginie, Martin, Jerome C., Chang, Christie, Rahman, Adeeb, Guen, Nina Salabert-Le, Braudeau, Cecile, Abidi, Ahmed, David, Gregoire, Malard, Florent, Takoudju, Celine, Martinet, Bernard, Gerard, Nathalie, Neveu, Isabelle, Neunlist, Michel, Coron, Emmanuel, MacDonald, Thomas T., Desreumaux, Pierre, Mai, Hoa-Le, Bas-Bernardet, Stephanie Le, Mosnier, Jean-Franqois, Merad, Miriam, Josien, Regis, Brouard, Sophie, Soulillou, Jean-Paul, Blancho, Gilles, Bourreille, Arnaud, Naveilhan, Philippe, Vanhove, Bernard, and Poirier, Nicolas
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Crohn's disease -- Research -- Genetic aspects ,Interleukins -- Research ,Ulcerative colitis -- Research -- Genetic aspects ,Inflammatory bowel diseases -- Research ,T cells -- Research ,Tumor necrosis factor ,Anti-inflammatory agents ,Inflammation ,B cells ,Colitis ,Medical research ,Integrins ,Health care industry - Abstract
It remains unknown what causes inflammatory bowel disease (IBD), including signaling networks perpetuating chronic gastrointestinal inflammation in Crohn's disease (CD) and ulcerative colitis (UC), in humans. According to an analysis of up to 500 patients with IBD and 100 controls, we report that key transcripts of the IL-7 receptor (IL-7R) pathway are accumulated in inflamed colon tissues of severe CD and UC patients not responding to either immunosuppressive/corticosteroid, anti- TNF, or anti-[[alpha].sub.4][[beta].sub.7] therapies. High expression of both IL7R and IL-7R signaling signature in the colon before treatment is strongly associated with nonresponsiveness to anti-TNF therapy. While in mice IL-7 is known to play a role in systemic inflammation, we found that in humans IL-7 also controlled [[alpha].sub.4][[beta].sub.7] integrin expression and imprinted gut-homing specificity on T cells. IL-7R blockade reduced human T cell homing to the gut and colonic inflammation in vivo in humanized mouse models, and altered effector T cells in colon explants from UC patients grown ex vivo. Our findings show that failure of current treatments for CD and UC is strongly associated with an overexpressed IL-7R signaling pathway and point to IL-7R as a relevant therapeutic target and potential biomarker to fill an unmet need in clinical IBD detection and treatment., Introduction Inflammatory bowel disease (IBD) consists of 2 major forms, ulcerative colitis (UC) and Crohn's disease (CD), which are chronic relapsing gastrointestinal disorders characterized by chronic intestinal inflammation, dysregulated immune [...]
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- 2019
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16. 212 CLEC-1 is a novel myeloid immune checkpoint for cancer immunotherapy limiting tumor cells phagocytosis and synergizing with tumor-targeted antibodies
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Vanessa Gauttier, Marion Drouin, Sabrina Pengam, Javier Saenz, Bérangère Evrard, Caroline Mary, Géraldine Teppaz, Ariane Desselle, Virginie Thépénier, Emmanuelle Wilhelm, Elise Chiffoleau, and Nicolas Poirier
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Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Published
- 2020
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17. Les représentations causales de la radicalisation. Analyse sémantico-discursive des discours institutionnels français (2013-2018)
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Pengam Manon and Jackiewicz Agata
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Social Sciences - Abstract
L’article présente une analyse sémantico-discursive des représentations causales de la radicalisation djihadiste dans un corpus de déclarations publiques de l’exécutif français entre 2013 et 2018 (environ 2 millions de mots). Le parcours analytique exposé, quantitatif et qualitatif, s’appuie sur un modèle des approches de la causalité (qualitative, analytique, fonctionnelle et synthétique), complété par l’observation de l’expression discursive de la radicalisation, notamment au moyen des métaphores. Nous mettons en lumière les facteurs causaux jugés déterminants par la parole institutionnelle pour expliquer l’entrée des individus, leur progression, et leur maintien dans l’engagement radical.
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- 2022
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18. Repérer et analyser les nominations sensibles : la radicalisation dans les discours du travail social
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Pengam, Manon, Pengam, Manon, Nathalie Garric, Julien Longhi, Frédéric Pugnière-Saavedra, and Valérie Rochaix
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[SHS.LANGUE] Humanities and Social Sciences/Linguistics - Published
- 2023
19. S'exprimer depuis l'hyper-ruralité. Exprimer l'hyper-ruralité
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Pengam, Manon and Pengam, Manon
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[SHS.LANGUE] Humanities and Social Sciences/Linguistics - Published
- 2023
20. Les doléances citoyennes, un genre de discours ? Essai de caractérisation sémantico-discursive
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Pengam, Manon and Pengam, Manon
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[SHS] Humanities and Social Sciences ,[SHS.LANGUE] Humanities and Social Sciences/Linguistics - Published
- 2023
21. À la recherche de l'expression citoyenne dans les cahiers de doléances
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Pengam, Manon and Pengam, Manon
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[SHS.LANGUE] Humanities and Social Sciences/Linguistics - Published
- 2023
22. The Books of Grievances of the Great National Debate
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Pengam, Manon and Pengam, Manon
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[SHS.LANGUE] Humanities and Social Sciences/Linguistics - Published
- 2023
23. A quality improvement program to improve nutritional status of children with Cystic Fibrosis aged 2-12 years old over a 3 year period at CF center Roscoff, Brittany
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Krista Revert, Laurence Audran, Jocelyne Pengam, Pascal Lesne, and Dominique Pougheon Bertrand
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Cystic Fibrosis ,Quality improvement program ,Therapeutic patient education ,Nutritional care ,Pediatric care ,BMI ,Medicine - Abstract
Abstract Background The Cystic Fibrosis (CF) center in Roscoff (Brittany) has been involved in therapeutic education programs (TEP) since 2006 and took part in the pilot phase of the French quality improvement program (QIP) since 2011. The aim was to improve the nutritional status of children with cystic fibrosis aged 2-12 years old in order to optimize their health status as they enter adolescence. Methods A multidisciplinary quality team was created in order to select and address a specific health problem among our pediatric population. Following analysis of yearly indicators for our CF center, our team chose to improve quality of care concerning nutritional status of children aged 2-12 years old. Factors influencing efficacy were studied, tools were developed to implement a new nutritional program, results were analyzed on a real-time basis. Results Over the 3 year period, all patients from 2 years of age, were monitored with the new follow-up program (2012: N = 34; 2014: N = 44). Each patient was followed up at every clinic visit, their BMI z-score was calculated to decide their nutritional risk and personalize their follow-up program consequently. Between 1/1/2012 and 31/12/2014, the mean BMI z-score of the open cohort improved from −0.49 to −0.22. Conclusions Since 2014, focus on nutrition using the newly-adapted program has become routine practice at each follow-up visit. Patients and parents expressed a high level of satisfaction (75% very satisfied). The follow-up program aimed at improving nutritional status for children aged 2-12 years old was successfully implemented and integrated into routine practice; it was therefore extended to all children with CF (1 month - 18 years) in our center. The relationship among professional and patients and parents was strengthened.
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- 2018
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24. P086 The French clinical research network in cystic fibrosis more than 10 years of positive experience in clinical research for patients
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Coudrat, A., primary, Auffret, M., additional, Chiron, R., additional, Abely, M., additional, Bluteau, C., additional, Bui, S., additional, Choubrac, C., additional, Carli, P. De, additional, Delattre, C., additional, Dufeu, N., additional, Epaud, R., additional, Rouzic, O. Le, additional, Mazur, S., additional, Orsero, S., additional, Pengam, J., additional, Ramel, S., additional, Reix, P., additional, Savadogo, M., additional, Wizla, N., additional, Gueganton, L., additional, and Ronayette, A., additional
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- 2023
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25. First-in-Human Study in Healthy Subjects with the Noncytotoxic Monoclonal Antibody OSE-127, a Strict Antagonist of IL-7Rα
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Poirier, Nicolas, primary, Baccelli, Irène, additional, Belarif, Lyssia, additional, Abès, Riad, additional, Teppaz, Géraldine, additional, Mary, Caroline, additional, Poli, Sonia, additional, Fromond, Claudia, additional, Girault, Isabelle, additional, Pengam, Sabrina, additional, Soma, Emilienne, additional, De Sa, Fanny, additional, Conduzorgues, Jean-Pascal, additional, Braudeau, Cécile, additional, Josien, Regis, additional, Volckaert, Bram, additional, Costantini, Dominique, additional, and Corallo, Frédérique, additional
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- 2023
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26. P721 Treatment of Ulcerative Colitis with OSE-127 (lusvertikimab), a Strict IL-7Rα Antagonist, Non-Cytotoxic Monoclonal Antibody
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Corallo, F, primary, Corallo, Frédérique, additional, Baccelli, Irène, additional, Belarif, Lyssia, additional, Teppaz, Géraldine, additional, Caroline, Mary, additional, Fromond, Claudia, additional, Girault, Isabelle, additional, Pengam, Sabrina, additional, Soma, Emilienne, additional, De Sa, Fanny, additional, Conduzorgues, Jean-Pascal, additional, Costantini, Dominique, additional, and Poirier, Nicolas, additional
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- 2023
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27. Sens et Emplois de l’Expression « Musulmans Modérés » dans les Discours Médiatiques
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Agata Jackiewicz and Manon Pengam
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History of scholarship and learning. The humanities ,AZ20-999 - Abstract
This article is a linguistic contribution to research about the representations of Islam and Muslims in French media’s discourses, in which we will specifically focus on the use and meanings of the expression ‘moderate Muslims’. We follow, in a diachronic approach, the emergence and evolution of this expression used in the newspaper Le Monde; then we study its modalities of usage in the discursive moment of the 2015 terrorist attacks. Finally, we put forward a path analysis suitable to the observation of the contexts and modalities of usage (forms of adjustment and negotiation of meaning, modalities of commitment…) of the designations using a semantic and referential instability. AbstraiteCet article est une contribution linguistique aux recherches portant sur les représentations associées à l’islam et aux musulmans dans les discours médiatiques en France, dans laquelle on s’intéresse plus particulièrement au(x) sens et aux emplois de la nomination « musulmans modérés ». Nous retraçons, sur le plan diachronique, l’émergence et l’évolution des emplois de l’expression dans le journal Le Monde, puis nous observons ses modalités d’emploi dans le moment discursif des attentats de 2015. On propose enfin un parcours d’analyse adapté à l’observation des contextes et des modalités d’emplois (formes d’ajustement et de négociation du sens, modalités de prise en charge…) des désignations présentant une instabilité sémantique et référentielle.
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- 2019
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28. IL-7 receptor blockade blunts antigen-specific memory T cell responses and chronic inflammation in primates
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Belarif, Lyssia, Mary, Caroline, Jacquemont, Lola, Mai, Hoa Le, Danger, Richard, Hervouet, Jeremy, Minault, David, Thepenier, Virginie, Nerrière-Daguin, Veronique, Nguyen, Elisabeth, Pengam, Sabrina, Largy, Eric, Delobel, Arnaud, Martinet, Bernard, Le Bas-Bernardet, Stéphanie, Brouard, Sophie, Soulillou, Jean-Paul, Degauque, Nicolas, Blancho, Gilles, Vanhove, Bernard, and Poirier, Nicolas
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- 2018
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29. Effect of personalized moderate exercise training on Wistar rats fed with a fructose enriched water
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Dupas, Julie, Feray, Annie, Guernec, Anthony, Pengam, Morgane, Inizan, Manon, Guerrero, François, Mansourati, Jacques, and Goanvec, Christelle
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- 2018
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30. FR104, an Antagonist Anti-CD28 Monovalent Fab’ Antibody, Prevents Alloimmunization and Allows Calcineurin Inhibitor Minimization in Nonhuman Primate Renal Allograft
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Poirier, N., Dilek, N., Mary, C., Ville, S., Coulon, F., Branchereau, J., Tillou, X., Charpy, V., Pengam, S., Nerriere-Daguin, V., Hervouet, J., Minault, D., Le Bas-Bernardet, S., Renaudin, K., Vanhove, B., and Blancho, G.
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- 2015
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31. CLEC-1 is a death sensor that limits antigen cross-presentation by dendritic cells and represents a target for cancer immunotherapy
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Drouin, Marion, primary, Saenz, Javier, additional, Gauttier, Vanessa, additional, Evrard, Berangere, additional, Teppaz, Geraldine, additional, Pengam, Sabrina, additional, Mary, Caroline, additional, Desselle, Ariane, additional, Thepenier, Virginie, additional, Wilhelm, Emmanuelle, additional, Merieau, Emmanuel, additional, Ligeron, Camille, additional, Girault, Isabelle, additional, Lopez, Maria-Dolores, additional, Fourgeux, Cynthia, additional, Sinha, Debajyoti, additional, Baccelli, Irene, additional, Moreau, Aurelie, additional, Louvet, Cedric, additional, Josien, Regis, additional, Poschmann, Jeremie, additional, Poirier, Nicolas, additional, and Chiffoleau, Elise, additional
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- 2022
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32. 484 Blockade of the myeloid CLEC-1 checkpoint enhances antitumor responses and tumor antigen cross-presentation
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Gauttier, Vanessa, primary, Drouin, Marion, additional, Girault, Isabelle, additional, Baccelli, Irène, additional, Pengam, Sabrina, additional, Wilhelm, Emmanuelle, additional, Saenz, Javier, additional, Taurelle, Julien, additional, Merieau, Emmanuel, additional, Evrard, Bérangère, additional, Mary, Caroline, additional, Teppaz, Géraldine, additional, Desselle, Ariane, additional, Thépénier, Virginie, additional, Poirier, Nicolas, additional, and Chiffoleau, Elise, additional
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- 2022
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33. CLEC-1 is a death sensor that limits antigen cross-presentation by dendritic cells and represents a target for cancer immunotherapy
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Marion Drouin, Javier Saenz, Vanessa Gauttier, Berangere Evrard, Geraldine Teppaz, Sabrina Pengam, Caroline Mary, Ariane Desselle, Virginie Thepenier, Emmanuelle Wilhelm, Emmanuel Merieau, Camille Ligeron, Isabelle Girault, Maria-Dolores Lopez, Cynthia Fourgeux, Debajyoti Sinha, Irene Baccelli, Aurelie Moreau, Cedric Louvet, Regis Josien, Jeremie Poschmann, Nicolas Poirier, and Elise Chiffoleau
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Mice ,Antigen Presentation ,Multidisciplinary ,Cross-Priming ,Neoplasms ,Animals ,Immunotherapy ,Dendritic Cells - Abstract
Tumors exploit numerous immune checkpoints, including those deployed by myeloid cells to curtail antitumor immunity. Here, we show that the C-type lectin receptor CLEC-1 expressed by myeloid cells senses dead cells killed by programmed necrosis. Moreover, we identified Tripartite Motif Containing 21 (TRIM21) as an endogenous ligand overexpressed in various cancers. We observed that the combination of CLEC-1 blockade with chemotherapy prolonged mouse survival in tumor models. Loss of CLEC-1 reduced the accumulation of immunosuppressive myeloid cells in tumors and invigorated the activation state of dendritic cells (DCs), thereby increasing T cell responses. Mechanistically, we found that the absence of CLEC-1 increased the cross-presentation of dead cell–associated antigens by conventional type-1 DCs. We identified antihuman CLEC-1 antagonist antibodies able to enhance antitumor immunity in CLEC-1 humanized mice. Together, our results demonstrate that CLEC-1 acts as an immune checkpoint in myeloid cells and support CLEC-1 as a novel target for cancer immunotherapy.
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- 2022
34. 484 Blockade of the myeloid CLEC-1 checkpoint enhances antitumor responses and tumor antigen cross-presentation
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Vanessa Gauttier, Marion Drouin, Isabelle Girault, Irène Baccelli, Sabrina Pengam, Emmanuelle Wilhelm, Javier Saenz, Julien Taurelle, Emmanuel Merieau, Bérangère Evrard, Caroline Mary, Géraldine Teppaz, Ariane Desselle, Virginie Thépénier, Nicolas Poirier, and Elise Chiffoleau
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- 2022
35. Un modèle pour l’étude des nominations émergentes. Notion de repérage pour saisir les modalités d’ajustement sémantique et discursif
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Jackiewicz Agata and Pengam Manon
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Social Sciences - Abstract
L’article présente une esquisse d’un modèle linguistique destiné à guider l’interprétation des nominations émergentes, avant de détailler un procédé particulier, l’ajustement, saisi à travers différents modes de repérage sémantico-logique. Partant de l’idée selon laquelle plus une catégorie est instable ou incertaine, plus elle a besoin d’être située par rapport à des catégories stables ou mieux établies, nous proposons de mobiliser un réseau de relateurs permettant de déterminer les rapports qu’une catégorie donnée est amenée à entretenir avec des catégories « repères » (englobantes, soeurs…). Le parcours interprétatif proposé est illustré par les emplois de deux expressions sémantiquement et référentiellement instables musulman modéré et radicalisation.
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- 2020
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36. P721 Treatment of Ulcerative Colitis with OSE-127 (lusvertikimab), a Strict IL-7Rα Antagonist, Non-Cytotoxic Monoclonal Antibody
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F Corallo, Frédérique Corallo, Irène Baccelli, Lyssia Belarif, Géraldine Teppaz, Mary Caroline, Claudia Fromond, Isabelle Girault, Sabrina Pengam, Emilienne Soma, Fanny De Sa, Jean-Pascal Conduzorgues, Dominique Costantini, and Nicolas Poirier
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Gastroenterology ,General Medicine - Abstract
Background Key transcripts of the IL-7R pathway were shown to accumulate in inflamed colon tissues of severe IBD patients not responding to conventional or biologics therapies. Furthermore, high expression of both IL7R and IL-7R signaling signature in the colon before treatment is strongly associated with non-responsiveness to anti-TNF therapy. We have designed a humanized monoclonal antibody targeting the IL-7Rα chain, named OSE-127 (lusvertikimab), which displays strict antagonist activity without cytotoxicity nor internalizing properties. In an ex vivo culture system using colon biopsies from UC patients, OSE-127 altered synthesis of interferon γ by Teff. In addition, IL-7R blockade by OSE-127 in humanized mouse models reduced human T cell homing to the gut and colonic inflammation (Belarif L et al, 2019). Methods A first-in-human, phase I, randomized, double-blind, placebo-controlled, single-center study was carried out to determine the safety, pharmacokinetics and pharmacodynamics of OSE-127 administration. Results Sixty-three healthy subjects were randomly assigned to OSE-127 or placebo with 45 of them exposed to the active product in 9 groups: 6 single ascending dose groups with intravenous (IV) administration (0.002-10 mg/kg), 1 subcutaneous treatment group (1 mg/kg) and 2 double IV infusion groups (6 or 10 mg/kg). OSE-127 was well tolerated, with no evidence of cytokine-release syndrome and no significant alteration of blood lymphocyte counts or subset populations. OSE-127’s pharmacokinetic half-life after a single dose increased from 4.6 days (1mg/kg) to 11.7 days (10 mg/kg) and, after a second dose, from 12.5 days (6 mg/kg) to 16.25 days (10 mg/kg). Receptor occupancy was ≥ 95% at doses ≥ 0.02 mg/kg and this saturation level was maintained up to >100 days after 2 IV infusions at 10 mg/kg. Furthermore, a differential gene expression signature performed in peripheral leukocytes, pre- and post-OSE-127 administration, identified six IL-7 pathway-related genes (BCL2, CISH, PTGER2, DPP4, SOCS2 and FLT3LG). Interestingly, decreased expression of this signature was sustained overtime in accordance with the systemic drug exposure. The differential expression of 4 of these 6 genes (BCL2, CISH, PTGER2, DPP4) has been individually validated by quantitative RT-qPCR, and this novel 4-gene signature appears to follow a dose-dependent expression. Conclusion Our data provide evidence that IL-7 receptor can be blocked in humans without inducing serious adverse events. The signature identified in the peripheral leukocytes of subjects having received OSE-127 represents a robust and simple means to monitor target engagement in the clinical setting. OSE-127 is currently being evaluated in a Phase 2b study in UC patients (CoTikiS study: NCT04882007).
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- 2023
37. Saisir le réel et le langagier par l'étude des nominations. Présentation d'un modèle linguistique de repérage et d'analyse
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Pengam, Manon, Université Paul-Valéry - Montpellier 3 (UPVM), and Pengam, Manon
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[SHS.LANGUE]Humanities and Social Sciences/Linguistics ,[SHS.LANGUE] Humanities and Social Sciences/Linguistics - Abstract
International audience; La question des liens entre la langue et la réalité est classique en linguistique, en particulier pour la sémantique référentielle qui cherche à décrire les relations entre linguistique et extralinguistique (Kleiber, 1997). Le langage étant le lieu d'une activité indissociablement linguistique, sociale et culturelle (Lafont et Gardès-Madray, 1996), on constate que l'émergence dans les discours publics de nouveaux phénomènes (en particulier sociopolitiques : « musulmans modérés », « harcèlement de rue », « radicalisation »…) conduit les locuteurs à employer des procédés discursifs d'ajustement, d'élaboration ou encore de rejet, lesquels agissent comme des révélateurs de connaissances et de représentations accolées à ces phénomènes. La communication présente un modèle sémantico-logique d'analyse et de repérage de ces nominations (au sens de Siblot, 1997, 2001) émergentes, sensibles et sémantiquement et référentiellement instables.
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- 2022
38. When public action communicates through metaphor. The exemple of the terrorist and pandemic crises
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Pengam, Manon and Pengam, Manon
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[SHS.LANGUE] Humanities and Social Sciences/Linguistics - Published
- 2022
39. S'exprimer depuis 'l'hyper-ruralité'. Analyse discursive des Cahiers de doléances de la Creuse
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Pengam, Manon and Pengam, Manon
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[SHS] Humanities and Social Sciences ,[SHS.LANGUE] Humanities and Social Sciences/Linguistics - Published
- 2022
40. Selective SIRPα blockade reverses tumor T cell exclusion and overcomes cancer immunotherapy resistance
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Riad Abes, Kevin Biteau, Alexandre Glémain, Christophe Blanquart, Dominique Costantini, Catherine Ruiz, David Laplaud, Hélène Aublé, Stéphanie Le Bas-Bernardet, E. Sergio Trombetta, Véronique Catros, Gilles Blancho, Isabelle Archambeaud, Sylvie Métairie, Isabelle Girault, Emmanuelle Wilhelm, Masayuki Miyasaka, Jean-François Mosnier, Vanessa Gauttier, Sabrina Pengam, Charlène Trilleaud, Alexandra Garcia, Pierre-Antoine Gouraud, Pierre Duplouye, Bernard Martinet, Géraldine Teppaz, Georgia Porto, Fabienne Haspot, Sarah Bruneau, Aurore Morello, Justine Durand, Caroline Mary, Richard Danger, Sophie Conchon, Nathalie Labarrière, Kerry L. M. Ralph, Virginie Thepenier, Nicolas Vince, Nicolas Poirier, Bernard Vanhove, Virginie Vignard, Mélanie Néel, Safa Dehmani, OSE Immunotherapeutics [Nantes, France], Centre de Recherche en Transplantation et Immunologie (U1064 Inserm - CRTI), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN), Centre hospitalier universitaire de Nantes (CHU Nantes), Institut de transplantation urologie-néphrologie (ITUN), Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes), Boehringer Ingelheim Pharma GmbH & Co. KG, Osaka University, Anti-Tumor Immunosurveillance and Immunotherapy (CRCINA-ÉQUIPE 3), Centre de Recherche en Cancérologie et Immunologie Nantes-Angers (CRCINA), Université de Nantes (UN)-Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA), Université de Nantes (UN), Immunogenic Cell Death and Mesothelioma Therapy (CRCINA-ÉQUIPE 4), Nutrition, Métabolismes et Cancer (NuMeCan), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), CHU Pontchaillou [Rennes], Centre de Ressources Biologiques Santé (CRB Santé), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-CHU Pontchaillou [Rennes]-CRLCC Eugène Marquis (CRLCC), Institut des maladies de l'appareil digestif [Nantes] (IMAD), BPI EFFI-CLIN PSPC grant,INCA MDSCAN PRT-K15-136, the French Public Bank of Investment and French Institut National du Cancer, Université d'Angers (UA)-Université de Nantes (UN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Université d'Angers (UA)-Université de Nantes (UN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre hospitalier universitaire de Nantes (CHU Nantes), Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université de Rennes (UR)-CHU Pontchaillou [Rennes]-CRLCC Eugène Marquis (CRLCC), and Jonchère, Laurent
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0301 basic medicine ,T-Lymphocytes ,[SDV]Life Sciences [q-bio] ,T cell ,medicine.medical_treatment ,Immunology ,T cells ,Cancer immunotherapy ,Therapeutics ,Mice ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Animals ,Receptors, Immunologic ,Mice, Inbred BALB C ,Tumor microenvironment ,Chemistry ,Macrophages ,CD47 ,Mammary Neoplasms, Experimental ,General Medicine ,Immune checkpoint ,Neoplasm Proteins ,3. Good health ,Blockade ,[SDV] Life Sciences [q-bio] ,030104 developmental biology ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Chemokine secretion ,Cancer research ,Female ,Immunotherapy ,Immunologic Memory ,Memory T cell ,Research Article - Abstract
International audience; T cell exclusion causes resistance to cancer immunotherapies via immune checkpoint blockade (ICB). Myeloid cells contribute to resistance by expressing signal regulatory protein-α (SIRPα), an inhibitory membrane receptor that interacts with ubiquitous receptor CD47 to control macrophage phagocytosis in the tumor microenvironment. Although CD47/SIRPα-targeting drugs have been assessed in preclinical models, the therapeutic benefit of selectively blocking SIRPα, and not SIRPγ/CD47, in humans remains unknown. We report a potent synergy between selective SIRPα blockade and ICB in increasing memory T cell responses and reverting exclusion in syngeneic and orthotopic tumor models. Selective SIRPα blockade stimulated tumor nest T cell recruitment by restoring murine and human macrophage chemokine secretion and increased anti-tumor T cell responses by promoting tumor-antigen crosspresentation by dendritic cells. However, nonselective SIRPα/SIRPγ blockade targeting CD47 impaired human T cell activation, proliferation, and endothelial transmigration. Selective SIRPα inhibition opens an attractive avenue to overcoming ICB resistance in patients with elevated myeloid cell infiltration in solid tumors.
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- 2020
41. Pour une modélisation linguistique de la radicalisation. Étude de discours institutionnels et de discours du travail social
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Pengam, Manon and Pengam, Manon
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analyse de discours ,radicalisation ,social work ,institutional discourses ,speech analysis ,radicalization ,sémantique ,[SHS] Humanities and Social Sciences ,discours institutionnels ,semantics ,travail social ,[SHS.LANGUE] Humanities and Social Sciences/Linguistics - Abstract
The concept of radicalization was embraced by the French public authorities in the mid-2010s through various action plans aiming at detecting potential or proven cases of radicalization before the commission of jihadist-inspired terrorist acts. This institutionalization of the fight against radicalization relied on the territorial outlets of the State and on existing public policies (national education, child welfare, etc.). This thesis primarily investigates specialized prevention organizations, a sector at the crossroads of social labour and child welfare, that were particularly called upon to detect so-called radicalized profiles, because of their presence in areas considered priorities by city policies.This work deals with the semantic-discursive characteristics of the lexeme radicalization in institutional and political speeches, as well as in social work speeches.The analysis uses two types of materials: 680 institutional speeches produced by the French government between 2013 and 2018 (containing the lemma radicalization), and ten semi-structured interviews conducted as part of an investigation of specialized prevention educators of the Occitanie Region. This freely accessible corpus constitutes an unprecedented resource for linguists, sociologists and political scientists, but also for students in social careers, as well as social workers wishing to analyse further the programmes of meaning and uses of the notion of radicalization.On the socio-discursive level, the contrastive study of these two corpora makes it possible to observe the production of a public policy and its reception within a sector that is directly concerned. From a linguistic point of view, it is a matter of developing and formalizing a process for analysing the notion of radicalization. The proposed model is based on an in-depth study of work in the sociology of social movements which aims to describe the mechanisms specific to radical trajectories, a synthesis of which is presented in the first part of the thesis. Three major observations emerge: (i) radicalization is a complex socio-political notion whose meaning escapes stabilization, (ii) radicalization is an intrinsically processual concept, (iii) radicalization is a multifactorial and multidimensional notion.Based on these findings, I designed an ad hoc linguistic analysis corpus that integrates three axes. On the first axis, I retrace the manifestations of the semantic and discursive instability of the notion of radicalization. I question, on the one hand, the meaning in language of the word radicalization, and, on the other hand, its discursive status of 'nomination'. For this purpose I probe into both referential and linguistic facets carried by the noun. The second axis questions the dynamics of the radicalization process and its representations in the two sources of discourse under study. The analysis emphasizes the different stages of the process, as well as the mechanisms of passage between these stages, modelled with a topologically inspired framework. The third axis focuses on the causal representations of radicalization. This representation sheds light on the causal factors that were judged decisive by institutional words and by social workers in order to explain the entering of individuals, their progression and their maintenance in radical engagement.More broadly, this work argues for a better knowledge of linguistic methods, insufficiently mobilized, and still too little known in other social sciences. It offers tools that shed light on the meaning and uses of complex and composite notions, notably through the contextualized study of their semantic profiles and the discursive processes that update them. This original interpretive path can be reproduced, in particular for disciplines whose object is to describe and model, from their discursive inscription, concepts related to socially sensitive themes., Le concept de radicalisation a été investi par les pouvoirs publics français au mitan des années 2010 à travers des plans d’action visant à détecter des cas potentiels ou avérés de radicalisation avant la commission d’actes terroristes d’inspiration djihadiste. Cette institutionnalisation de la lutte contre la radicalisation s’est appuyée sur les relais territoriaux de l’État et sur des politiques publiques existantes (Éducation Nationale, Aide sociale à l’enfance…). Dans ce travail je me suis intéressée aux associations de prévention spécialisée, un secteur au croisement du travail social et de l’Aide sociale à l’enfance, sollicité dans la détection de profils dits radicalisés en raison de sa présence sur des territoires classés prioritaires par les politiques de la ville.La thèse s’intéresse à la mise en discours du lexème radicalisation dans les discours institutionnels et politiques et dans les discours du travail social, selon une perspective sémantico-discursive.L’analyse utilise deux matériaux : 680 discours institutionnels produits par l’exécutif français entre 2013 et 2018 (contenant le lemme radicalisation), et dix entretiens semi-directifs menés dans le cadre d’une enquête auprès d’éducateurs de prévention spécialisée de la Région Occitanie. Ce corpus constitue une ressource inédite pour les linguistes, sociologues et politistes, mais aussi étudiants en carrières sociales et travailleurs sociaux désireux d’approfondir les programmes de sens et les usages de la notion de radicalisation.Sur le plan socio-discursif, l’étude contrastive de ces deux corpus permet d’observer la production d’une politique publique et sa réception au sein d’un secteur directement concerné. Sur le plan langagier, il s’agit d’élaborer et de formaliser une démarche d'analyse de la notion de radicalisation. La modélisation proposée repose sur l’étude approfondie des travaux en sociologie des mouvements sociaux qui cherchent à décrire les mécanismes propres aux trajectoires radicales. Trois grands constats émergent : (i) la radicalisation est une notion sociopolitique complexe dont le sens échappe à la stabilisation, (ii) la radicalisation est un concept intrinsèquement processuel, (iii) la radicalisation est une notion pluricausale et multidimensionnelle. Partant de ces constats, j’ai conçu un parcours d’analyse linguistique ad hoc qui intègre trois axes. Sur le premier axe, on retrace les manifestations de l’instabilité sémantique et discursive de la notion de radicalisation. Je m’interroge d’une part sur le sens en langue du mot radicalisation, et d’autre part à son statut discursif de nomination. De manière originale, on sonde à cet effet les facettes tant référentielles que langagières portées par la nomination. Le deuxième axe questionne les dynamiques du processus de radicalisation. L’analyse met l’accent sur les différentes étapes du processus, ainsi que sur les mécanismes de passage entre ces étapes, modélisés au moyen d’un schème d’inspiration topologique. Le troisième axe place la focale sur les représentations causales de la radicalisation. Je mets en lumière les facteurs causaux jugés déterminants par la parole institutionnelle et par les travailleurs sociaux pour expliquer l’entrée des individus, leur progression et leur maintien dans l’engagement radical. Plus largement, ce travail plaide pour une meilleure connaissance des méthodes linguistiques, insuffisamment mobilisées, et encore trop peu connues des autres sciences humaines et sociales. Il propose des outils qui permettent d'éclairer le sens et les usages des notions complexes et composites, grâce notamment à l'étude contextualisée de leurs profils sémantiques et des procédés discursifs qui les actualisent. Ce parcours interprétatif original peut être reproduit, en particulier pour les disciplines dont l'objet est de décrire et de modéliser, à partir de leur inscription discursive, des concepts liés à des sujets socialement sensibles.
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- 2021
42. SIRPα/CD47 axis controls the maintenance of transplant tolerance sustained by myeloid-derived suppressor cells
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Bernard Vanhove, Bernard Martinet, Vanessa Gauttier, Sabrina Pengam, Virginie Thepenier, Véronique Daguin, Karine Renaudin, Nicolas Poirier, Justine Durand, Caroline Mary, Géraldine Teppaz, Claire Usal, Gilles Blancho, Nahzli Dilek, OSE Immunotherapeutics [Nantes, France], Centre de Recherche en Transplantation et Immunologie (U1064 Inserm - CRTI), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN), Institut de transplantation urologie-néphrologie (ITUN), Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes), and Le Bihan, Sylvie
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Graft Rejection ,macrophage/monocyte biology ,basic (laboratory) research/science ,Chemokine ,[SDV]Life Sciences [q-bio] ,CD47 Antigen ,immunosuppression/immune modulation ,Immune tolerance ,03 medical and health sciences ,0302 clinical medicine ,Immune system ,Animals ,Immunology and Allergy ,Medicine ,Myeloid Cells ,Pharmacology (medical) ,Receptors, Immunologic ,CD47 ,SIRP alpha ,immunobiology ,030304 developmental biology ,CD86 ,0303 health sciences ,Transplantation ,graft tolerance ,biology ,business.industry ,Graft Survival ,chemokine ,immune regulation ,Antibodies, Monoclonal ,myeloid-derived suppressor cells ,Kidney Transplantation ,Immune checkpoint ,Rats ,3. Good health ,[SDV] Life Sciences [q-bio] ,tolerance: mechanisms ,Chemokine secretion ,Cancer research ,biology.protein ,Myeloid-derived Suppressor Cell ,Transplantation Tolerance ,Chemokines ,business ,030215 immunology - Abstract
International audience; Myeloid-derived suppressor cells (MDSC) are a heterogeneous population of immature hematopoietic precursors known to suppress immune responses. Interaction of SIRP alpha (SIRPα), expressed by myeloid cells, with the ubiquitous receptor CD47 is an important immune checkpoint of the innate response regulating macrophages and dendritic cells functions. We previously described that MDSC expressing SIRPα accumulated after transplantation and maintained kidney allograft tolerance. However, the role of the SIRPα/CD47 axis on MDSC function remained unknown. Here, we found that blocking SIRPα or CD47 with monoclonal antibodies (mAbs) induced differentiation of MDSC into myeloid cells overexpressing MHC class II, CD86 costimulatory molecule and increased secretion of macrophage-recruiting chemokines (eg, MCP-1). Using a model of long-term kidney allograft tolerance sustained by MDSC, we observed that administration of blocking anti-SIRPα or CD47 mAbs induced graft dysfunction and rejection. Loss of tolerance came along with significant decrease of MDSC and increase in MCP-1 concentration in the periphery. Graft histological and transcriptomic analyses revealed an inflammatory (M1) macrophagic signature at rejection associated with overexpression of MCP-1 mRNA and protein in the graft. These findings indicate that the SIRPα-CD47 axis regulates the immature phenotype and chemokine secretion of MDSC and contributes to the induction and the active maintenance of peripheral acquired immune tolerance.
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- 2019
43. 230 Preclinical efficacy of CLEC-1 antagonist as novel myeloid immune checkpoint therapy for oncology
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Gauttier, Vanessa, primary, Drouin, Marion, additional, Pengam, Sabrina, additional, Saenz, Javier, additional, Evrard, Bérangère, additional, Neyton, Stéphanie, additional, Mary, caroline, additional, Teppaz, Géraldine, additional, Desselle, Ariane, additional, Thépénier, Virginie, additional, Wilhelm, Emmanuelle, additional, Poirier, Nicolas, additional, and Chiffoleau, Elise, additional
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- 2021
- Full Text
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44. Concerted BAG3 and SIRPα blockade impairs pancreatic tumor growth
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Margot De Marco, Vanessa Gauttier, Sabrina Pengam, Caroline Mary, Bianca Ranieri, Anna Basile, Michela Festa, Antonia Falco, Francesca Reppucci, Anna Lisa Cammarota, Fausto Acernese, Vincenzo De Laurenzi, Gianluca Sala, Sergio Brongo, Masayuki Miyasaka, Shabnam Shalapour, Bernard Vanhove, Nicolas Poirier, Roberta Iaccarino, Michael Karin, Maria Caterina Turco, Alessandra Rosati, and Liberato Marzullo
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Cancer Research ,Cellular and Molecular Neuroscience ,Immunology ,Cell Biology - Abstract
The BAG3- and SIRPα- mediated pathways trigger distinct cellular targets and signaling mechanisms in pancreatic cancer microenvironment. To explore their functional connection, we investigated the effects of their combined blockade on cancer growth in orthotopic allografts of pancreatic cancer mt4–2D cells in immunocompetent mice. The anti-BAG3 + anti-SIRPα mAbs treatment inhibited (p = 0.007) tumor growth by about the 70%; also the number of metastatic lesions was decreased, mostly by the effect of the anti-BAG3 mAb. Fibrosis and the expression of the CAF activation marker α-SMA were reduced by about the 30% in animals treated with anti-BAG3 mAb compared to untreated animals, and appeared unaffected by treatment with the anti-SIRPα mAb alone; however, the addition of anti-SIRPα to anti-BAG3 mAb in the combined treatment resulted in a > 60% (p p p
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- 2021
45. Le lexème radicalisation au prisme du travail social : retour sur un dispositif d’enquête et propositions pour une recherche impliquée
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Pengam, Manon, Praxiling (Praxiling), Centre National de la Recherche Scientifique (CNRS)-Université Paul-Valéry - Montpellier 3 (UPVM), and Pengam, Manon
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Discours ,Sémantique ,Radicalisation ,Travail social ,[SHS.LANGUE]Humanities and Social Sciences/Linguistics ,Institutions ,[SHS.LANGUE] Humanities and Social Sciences/Linguistics - Abstract
International audience; Notion récemment investie par les pouvoirs publics à travers différents plans d’action, la radicalisation fait l’objet d’une demande sociale forte qui se matérialise notamment par des appels à financement de projets de recherche. Ce type de demande, s’il représente des opportunités de financements pour les chercheurs, apporte également son « lot d’interrogations et de tâtonnements sur les pratiques » (Léglise 2000), notamment chez les linguistes qui observent traditionnellement des réticences à intervenir dans le champ social (Rivera et alli 2012 : 141). Ma communication s'est proposée de revenir sur une recherche en cours (thèse de doctorat co-financée par l'Université Paul-Valéry Montpellier 3 et la Région Occitanie) dans laquelle je m’intéresse à la circulation et à la mise en sens du lexème radicalisation dans les discours institutionnels et dans les discours du travail social - plus précisément chez les éducateurs de prévention spécialisée -, selon une perspective de sémantique du discours (Lecolle et al. 2018). Le discours de ces professionnels, non immédiatement accessible au chercheur car étant à « produire par le mouvement de la recherche elle-même » (Boutet et al. 1995), a été recueilli, dans la présente étude, par l’intermédiaire d’un terrain d’enquête. J'ai questionné dans un premier temps ma place de chercheure dans la construction de ce terrain en revenant sur les étapes qui ont mené à la collecte du matériau langagier. Partant de ce retour réflexif, j'ai discuté dans un second temps du degré d’implication de ma recherche, en suivant l’axe proposé par St Georges (2012) qui distingue pour les travaux s’appuyant sur un terrain, recherche « appliquée », recherche « impliquée » et recherche « engagée ». A cet effet, j'ai tâché d’émettre des propositions en faveur d’une recherche « impliquée » (c’est-à-dire une recherche qui aspire à faire connaître ses analyses au terrain) notamment pour les travaux dont le lieu d’investigation(s) est l’unité discursive.Boutet, J., Gardin, B., & Lacoste, M. (1995). Discours en situation de travail. Langages, (117), 12‑31. https://doi.org/10.3406/lgge.1995.1703Lecolle, M., Veniard, M., & Guérin, O. (2018). Pour une sémantique discursive : propositions et illustrations. Langages, (210), 35‑54. https://doi.org/10.3917/lang.210.0035Léglise, I. (2000). Présentation. Lorsque les linguistes interviennent : écueils et enjeux. Revue francaise de linguistique appliquee, (5), 5‑13.Rivera, C., Brunner, P., Chaves, A., & Pordeus, M. (2008). La notion de terrain de recherche : une perspective renouvelée pour l’analyse du discours. In L’analyse du discours dans la société. Engagement du chercheur et demande sociale. Paris : Honoré Champion.Saint-Georges, I. (2012). Analyse des pratiques langagières et retombées pratiques pour le terrain : réflexions épistémologiques et propositions méthodologiques pour la construction d’un projet de recherche « impliqué » ou « engagé ». In L’analyse du discours dans la société :engagement du chercheur et demande sociale (p. 119‑140). Paris : L’Harmattan.
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- 2019
46. [Paramedical students mobilized]
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Dominique, Pengam, Nathalie, Kergaravat, and Richard, Pougnet
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SARS-CoV-2 ,COVID-19 ,Humans ,Students, Nursing - Abstract
Health students mobilized during the first two epidemic waves of COVID-19. They demonstrated their capacity for autonomy and initiative. They were able to adapt to the reorganization of their training and maintain a strong professional identity. Two senior health managers pay tribute to their commitment, their courage and their professional conscience.
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- 2021
47. Abstract 1636: CLEC-1 is a novel myeloid immune checkpoint for cancer immunotherapy limiting tumor cells phagocytosis and tumor antigen cross-presentation
- Author
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Gauttier, Vanessa, primary, Pengam, Sabrina, additional, Drouin, Marion, additional, Saenz, Javier, additional, Evrard, Bérangère, additional, Biteau, Kevin, additional, Mary, Caroline, additional, Teppaz, Géraldine, additional, Desselle, Ariane, additional, Thépénier, Virginie, additional, Wilhelm, Emmanuelle, additional, Chiffoleau, Elise, additional, and Poirier, Nicolas, additional
- Published
- 2021
- Full Text
- View/download PDF
48. Les étudiants paramédicaux mobilisés
- Author
-
Pengam, Dominique, primary, Kergaravat, Nathalie, additional, and Pougnet, Richard, additional
- Published
- 2021
- Full Text
- View/download PDF
49. Les étudiants en santé, leur équilibre en péril
- Author
-
Pougnet, Richard, primary, Quesnel, Guillaume, additional, Pengam, Dominique, additional, Carter, Charlotte, additional, Delpech-Dunoyer, Gaëlle, additional, and Pougnet, Laurence, additional
- Published
- 2021
- Full Text
- View/download PDF
50. Agonist anti-ChemR23 mAb reduces tissue neutrophil accumulation and triggers chronic inflammation resolution
- Author
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Trilleaud, C., primary, Gauttier, V., additional, Biteau, K., additional, Girault, I., additional, Belarif, L., additional, Mary, C., additional, Pengam, S., additional, Teppaz, G., additional, Thepenier, V., additional, Danger, R., additional, Robert-Siegwald, G., additional, Néel, M., additional, Bruneau, S., additional, Glémain, A., additional, Néel, A., additional, Poupon, A., additional, Mosnier, J. F., additional, Chêne, G., additional, Dubourdeau, M., additional, Blancho, G., additional, Vanhove, B., additional, and Poirier, N., additional
- Published
- 2021
- Full Text
- View/download PDF
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