985 resultados para Marion, Jean-Luc, 1946-


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In vitro studies suggested that sub-millisecond pulses of radiation elicit less genomic instability than continuous, protracted irradiation at the same total dose. To determine the potential of ultrahigh dose-rate irradiation in radiotherapy, we investigated lung fibrogenesis in C57BL/6J mice exposed either to short pulses (≤ 500 ms) of radiation delivered at ultrahigh dose rate (≥ 40 Gy/s, FLASH) or to conventional dose-rate irradiation (≤ 0.03 Gy/s, CONV) in single doses. The growth of human HBCx-12A and HEp-2 tumor xenografts in nude mice and syngeneic TC-1 Luc(+) orthotopic lung tumors in C57BL/6J mice was monitored under similar radiation conditions. CONV (15 Gy) triggered lung fibrosis associated with activation of the TGF-β (transforming growth factor-β) cascade, whereas no complications developed after doses of FLASH below 20 Gy for more than 36 weeks after irradiation. FLASH irradiation also spared normal smooth muscle and epithelial cells from acute radiation-induced apoptosis, which could be reinduced by administration of systemic TNF-α (tumor necrosis factor-α) before irradiation. In contrast, FLASH was as efficient as CONV in the repression of tumor growth. Together, these results suggest that FLASH radiotherapy might allow complete eradication of lung tumors and reduce the occurrence and severity of early and late complications affecting normal tissue.

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Contient : I « Recueille des antiquités de la noble maison de Hennin Liétart, faicte en Vallenciennes par Jacques Le Boucq (1571) » ; II « Stemmata ducum Brabantiae, Lotharingiae, comitum Namurcensium, Lemburgae, Bononiae, Nassoviae, Gelriae, Flandriae, Hollandiae, ducum Burgundiae, comitum Arthesiae ; stirps Habsburgica Aust[r]iaca, Francorum regum... genealogia, etc. » (Index stemmatum, fol. 43) ; III « Recueil et extraict de ce qu'il y a de plus particulier au second volume de la Cronique d'Hollande, fait par Jean-François Le Petit, historiographe »

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Contient : Blasons des rois et de quelques princes d'Europe ; « Églises paroissiales de Bruxelles, Anvers, Douay et Mons » ; « Les Recherches de M. Jean d'Hollander,... chanoine de... Mons en Haynaut, touchant les baillyfs et souverain de la comté, ville et terroir d'Alost et ville de Grandmont » ; « Catalogue des grands baillyfs de la ville et chastellenie de Berghes-St-Winnocx.??? » ; « Églises paroisiales de la ville de Louvain, » etc ; « Antiquitez de la ville de Tillemont » ; « Églises de Tournay, Arras, Huy, Dinant, Lille, Namur, Saint-Quintin, Laon, Reims, Péronne et Milan » ; « Registre des gouverneurs, chastelains, capitaines, baillifs, magistrats, abbez et abbesses de la Flandre gallicane » ; « Joseph Aegypti prorex a fratribus agnitus, symbolis illustrissimi Ordinis Equitum Aurei Vélleris illustratus,... dabitur a gratulabunda juventute gymnasii Societatis Jesu Bruxellis, die 5 decembris 1650. Bruxellis, » in-4°, impr