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See detailMéthodologie de calcul des flux turbulents : Corrections de fréquence
Heinesch, Bernard ULg

Conference (2013, January 29)

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See detailLes compétences en histoire : des empêcheurs de savoir ?
Jadoulle, Jean-Louis ULg

Article for general public (2013)

Detailed reference viewed: 8 (2 ULg)
See detailInteractomic map of the Ets factors family : Identification of unexpected functions in mRNA processing
Rambout, Xavier ULg; Simonis, Nicolas; Brohée, Sylvain et al

Poster (2013, January 28)

The Ets factors are a family of 27 transcription factors characterized by their unique DNA-binding domain. We aimed at building a protein-protein interaction (PPI) map (interactome) of the human Ets ... [more ▼]

The Ets factors are a family of 27 transcription factors characterized by their unique DNA-binding domain. We aimed at building a protein-protein interaction (PPI) map (interactome) of the human Ets factors in order to better define their roles and regulations in normal and oncogenic processes. The Ets interactome was built on a high-throughput yeast-two hybrid (Y2H) approach, and a literature and database curation. We identified 431 PPIs and 276 different protein partners. Clustering of the Ets interactome divided it into 24 functional subnetworks classified on their novelty index and their size. Cluster#1 was exclusively composed of newly identified interaction partners and was highly connected to the Erg subfamily of Ets factors. Gene ontology enrichment analysis revealed that it was associated to mRNA processing. In support of this result, we observed in HeLa cells that ERG and the components of cluster#1 localized in p-bodies and stress granules, physically linked cytoplasmic sites of mRNA degradation and silencing. Hence, we hypothesized that Erg proteins might have a role in post-transcriptional gene regulation and be involved in cellular mRNAs degradation. To test this hypothesis, we performed a MS2-based tethering assay and showed that the recruitment of ERG on a mRNA reporter promoted inhibition of its expression via a two-fold decrease of its half-life. ERG controls degradation of target mRNAs via different mechanisms including polysome stability, mRNA deadenylation, and p-bodies aggregation. A microarray-based appraoch identified 321 endogeneous genes whose mRNA decay rate was lowered in ERG silenced cells. Results point out the Nter domain of ERG as the predominant domain required for mRNA degradation. Importantly, oncogenic TET-Erg fusions described in AML and Ewing’s sarcoma exhibited diminished ability to degrade target mRNAs, concomitantly with the loss of the ERG Nter domain. This reinforces the important role of Erg proteins in mRNA degradation in cancer. [less ▲]

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See detailDeep sequencing reveals abundant non-canonical retroviral microRNAs in B-cell leukemia/lymphoma
Durkin, Keith ULg

Scientific conference (2013, January 28)

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See detailMéthodologie de calcul des flux turbulents : rotation du système de coordonnées
Heinesch, Bernard ULg

Conference (2013, January 28)

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See detailWhole organ culture in rotating bioreactor: the rat embryonic inner ear
Renauld, Justine ULg; Johnen, Nicolas ULg; Hubert, Pascale ULg et al

Poster (2013, January 28)

In eutherian mammals, the organ responsible for the transduction of sound waves into nerve impulses is called the organ of Corti. This structure located within the cochlea, a portion of the inner ear, is ... [more ▼]

In eutherian mammals, the organ responsible for the transduction of sound waves into nerve impulses is called the organ of Corti. This structure located within the cochlea, a portion of the inner ear, is composed by two types of cells: sensory hair cells and non-sensory supporting cells. All these cells are distributed according to a specific arrangement along the whole length of the cochlea. So far, the mammalian inner ear is very sensitive to damage, with no hair cell replacement or cell proliferation occurring in the cochlea. That is why understanding the mechanisms that regulate the mammalian cochlear development is important for pursuing strategies to induce sensory hair cells regeneration. Here, we present a technique of whole embryonic inner ear culture in rotating bioreactors. Besides, we compare two different culture media, DMEM and Neurobasal-A. Rat inner ears are sampled at the 16th embryonic day (E16) and grown in rotating bioreactors during 48h or six days. After 48h, semithin sections realized in the growing cochlea show the development of the ventral epithelium and ultrathin sections confirm the differentiation of the sensory hair cells. Using immunochemistry techniques on our material after 48h or six days in vitro, we show that all the cells of the organ of Corti are differentiating, whichever the culture medium used. Our preliminary results demonstrate that organ culture of the embryonic inner ear in rotating bioreactor is possible. Such a method provides an in vitro model for the investigation of developmental, regulatory, and differentiation processes that could be helpful in the understanding of the mechanisms underlying the development of the mammalian cochlea. [less ▲]

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See detailA multiaxial constitutive model for concrete in the fire situation
Gernay, Thomas ULg; Franssen, Jean-Marc ULg

in Proceedings of the 13th Fire and Materials Conference (2013, January 28)

Performance-based design in fire engineering leads to increasing demand for advanced temperature-dependent material models for the load bearing materials used in building structures. These models must be ... [more ▼]

Performance-based design in fire engineering leads to increasing demand for advanced temperature-dependent material models for the load bearing materials used in building structures. These models must be valid in natural fire situations including cooling down phase and must be sufficiently robust for complex numerical calculations such as, for example, the analysis of tensile membrane action in composite slabs. Although structural concrete is widely used in civil engineering, proper modelling of its thermo-mechanical behaviour remains a challenging issue for engineers mainly because of the complexity of the phenomena that result from the microcracking process in this material and because of the necessity to ensure the numerical robustness of the models. This paper presents a new multiaxial concrete model based on a plastic-damage formulation and developed to meet the specific requirements of structural fire engineers and researchers. The model, which incorporates an explicit term for transient creep strain and encompasses a limited number of material parameters, has been implemented in a finite element software dedicated to the nonlinear analysis of structures in fire. The paper presents a series of numerical simulations conducted to highlight the model ability to capture the main phenomena that develop in concrete under fire (permanent strains, degradation of the elastic properties, unilateral effect) as well as its ability to be used for the fire analysis of large-scale structural elements. As an example, the new concrete model is used in the numerical analysis of a full scale fire test on a composite steel-concrete slab and it is shown that the computed and measured results agree. [less ▲]

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See detailtax evasion and peer effects: an experiment in Belgium, France and the Netherlands
Lefebvre, Mathieu ULg

Conference (2013, January 28)

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See detailRole of Gamma Delta T cells in HPV-induced Cancer Progression
Van hede, Dorien ULg; Bastin, Renaud; Francis, Floriane et al

Poster (2013, January 28)

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See detailInteraction of HTLV-­1 Tax with minichromosome maintenance proteins accelerates the replication timing program
Carpentier, Alexandre ULg; Barez, Pierre-Yves ULg; Willems, Luc ULg

Conference (2013, January 28)

Human T-lymphotropic virus type 1 (HTLV-1) is a retrovirus that infects about twenty million individuals worldwide. HTLV-1 is the causative agent of different diseases among which the most common are the ... [more ▼]

Human T-lymphotropic virus type 1 (HTLV-1) is a retrovirus that infects about twenty million individuals worldwide. HTLV-1 is the causative agent of different diseases among which the most common are the adult T-cell leukemia (ATL) and a neurodegenerative disorder called HAM/TSP (Human associated myelopathy/ Tropical spastic paraparesis). A key parameter of HTLV-1 pathogenesis is faster replication of provirus-carrying lymphocytes allowing clonal expansion of infected cell populations. The virally-encoded Tax oncoprotein plays an essential role in this process by interacting with DNA replication origins and accelerating S phase progression. By reprogramming the timing of origin firing, Tax also creates a replicative stress leading to DNA double strand breaks. This mechanism further triggers the DNA damage response (DDR) that induces cell cycle arrest and initiates either apoptosis or senescence. However, HTLV-1 infected cells have developed strategies to interfere with the DDR and are adapted to checkpoint control. These cells are thus able to proliferate despite occurrence of DNA damage. Based on these observations, we now propose a novel therapeutic approach based on the principle of synthetic lethality. [less ▲]

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See detailReanalysis of “Bedside detection of awareness in the vegetative state: a cohort study”
Goldfine, Andrew; Bardin, Jonathan; Noirhomme, Quentin ULg et al

in Lancet (2013), 381

Detailed reference viewed: 100 (6 ULg)
See detailCharlemagne : un vrai liégeois
Close, Florence ULg

Conference given outside the academic context (2013)

Cette conférence grand public visait à exposer les arguments qui s'opposent à la thèse de la naissance de Charlemagne à Liège tout en soulignant l'importance du souvenir de l'empereur carolingien dans nos ... [more ▼]

Cette conférence grand public visait à exposer les arguments qui s'opposent à la thèse de la naissance de Charlemagne à Liège tout en soulignant l'importance du souvenir de l'empereur carolingien dans nos régions [less ▲]

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See detailPropensity of the Tomato Leafminer, Tuta absoluta (Lepidoptera: Gelechiidae), to Develop on Four Potato Plant Varieties
Caparros Megido, Rudy ULg; Brostaux, Yves ULg; Haubruge, Eric ULg et al

in American Journal of Potato Research (2013)

The tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae), is now considered to be one of the most damaging invasive pests of tomatoes in the world. Tomato is regarded as the main host of T. absoluta ... [more ▼]

The tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae), is now considered to be one of the most damaging invasive pests of tomatoes in the world. Tomato is regarded as the main host of T. absoluta, but the pest can also feed, develop and reproduce on other cultivated Solanaceae, such as potato (Solanum tuberosum L). In the present study, we examined the ability of T. absoluta to develop on four commonly cultivated varieties of potato, under laboratory conditions. The survival rate of T. absoluta did not differ between the five tested host plants (tomato: Solanum lycopersicum cv. Moneymaker; and potato: Solanum tuberosum cv. Spunta, Charlotte, Nicola, and Bintje), but its development time (egg to pupation) was significantly affected. Compared to tomato, development times were longer on Bintje and shorter on Nicola, Charlotte, and Spunta. These results show the high capacity of T. absoluta to develop on potato crops. [less ▲]

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See detailConfigurations publiques de Dionysos dans le cadre de l'hellénisation de Rome
Caneva, Stefano ULg

Conference (2013, January 25)

En 140/39 av. J.-C., une mission romaine composée, entre autres, de Scipion Emilien et du philosophe Panétios visita les alliés orientaux de Rome et se rendit notamment à Alexandrie. Le roi Ptolémée VIII ... [more ▼]

En 140/39 av. J.-C., une mission romaine composée, entre autres, de Scipion Emilien et du philosophe Panétios visita les alliés orientaux de Rome et se rendit notamment à Alexandrie. Le roi Ptolémée VIII y accueillit officiellement ces hôtes prestigieux, vêtu d’un habit étrange : un chiton long et subtil, dont les auteurs anciens réfèrent unanimement l’effet efféminé et caricatural, au point de susciter le rire des Romains et une condamnation du luxe effréné et décadent du royaume égyptien par comparaison avec la sobriété romaine. Il a fallu attendre une étude de H. Heinen en 1983 pour reconnaître, d’une part, l’envergure idéologique du lien entre la tenue de Ptolémée VIII – en fait empruntée à l’iconographie hellénistique de Dionysos – et la mise en scène officielle de la tryphè et du pouvoir royal et, de l’autre, le sens politique de la représentation caricaturale qu’en donna probablement déjà Panétios, représentation qui fut relayée et amplifiée par toute une tradition historiographique philo-romaine, qui se développa tout au long de la conquête romaine de la Méditerranée et ensuite à l’occasion du conflit entre Octavien et Antoine. Cette tradition nous a transmis, par le biais des auteurs de l’époque impériale, un discours fondé sur l’opposition entre Rome (et l’Italie), vertueuse source de citoyens et de soldats, et l’Orient dégénéré. Dans un tel cadre, Dionysos et le dionysisme sont sollicités pour servir à la construction d’un modèle accusatoire contre les ennemis de Rome, incarnant le désordre dans une dimension à la foi individuelle et institutionnelle. Mais est-ce que cette vision idéologique nous donne un portrait satisfaisant des rapports réels entre Rome et Dionysos / Bacchos / Liber Pater ? En partant de cette question, je propose dans ma contribution une approche visant à analyser, à l’aide de sources aussi littéraires que documentaires, les contextes de contact entre Rome et Dionysos de l’époque hellénistique au début du Principat, pour essayer de mettre en relief les relations entre, d’une part, la répulsion et le refus idéologiques du dionysisme, de l’autre les démarches d’appropriation et d’adaptation, à la culture romaine, de traits caractérisant les cultes hellénistiques de Dionysos et leurs utilisation dans la mise en forme des pratiques du pouvoir et de leurs représentations. [less ▲]

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