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See detailLa régulation par l'observation
Lecocq, Pascale ULg

Conference (2013, May)

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See detailRégulation temporelle du comportement et anticipation
Richelle, Marc ULg; Lejeune, Helga ULg

in Requin, J. (Ed.) Anticipation et comportement (1980)

The temporal regulation of the subject's own behavior, as studied with operant conditioning techniques, is a particularly precise example of behavioral anticipation. The study of collateral behavior, the ... [more ▼]

The temporal regulation of the subject's own behavior, as studied with operant conditioning techniques, is a particularly precise example of behavioral anticipation. The study of collateral behavior, the analysis of the effects of physical restraint of movement and of the periodical structure of some contingencies of reinforcement converge to suggest that an active inhibitory mechanism underlies these regulations. The efficient involvement of this mechanism beyond certain temporal limits would be restricted in the absence of compensatory factors counterbalancing the inhibitory overload. Unpublished experimental data supports this hypothesis. [less ▲]

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See detailRégulation transcriptionnelle du gène de la prolactine humaine
Muller, Marc ULg; Berwaer, Monique; Caccavelli, Laure et al

in Medecine Sciences : M/S (1998), 14(580-587),

Le gène humain de la prolactine (hPRL) est exprimé essentiellement par l'antéhypophyse. L'analyse des éléments régulateurs de la transcription sur plus de 5 000 bases en amont du site de début de ... [more ▼]

Le gène humain de la prolactine (hPRL) est exprimé essentiellement par l'antéhypophyse. L'analyse des éléments régulateurs de la transcription sur plus de 5 000 bases en amont du site de début de transcription a montré l'importance du contrôle par le facteur de transcription Pit-1, spécifique de l'hypophyse, à côté de facteurs ubiquistes. Des hormones modulent l'expression du gène hPRL, transmettant leur signal par les voies intracellulaires de l'AMP cyclique et du calcium, relayées au niveau du promoteur proximal (-250/+1) essentiellement par les facteurs de transcription Pit-1 et AP-1. Les récepteurs nucléaires contrôlent aussi en partie la transcription de hPRL: le récepteur des oestrogènes l'active en se liant aux éléments de réponse distaux ; les récepteurs nucléaires des hormones thyroïdiennes et des glucocorticoïdes la répriment en interférant respectivement avec la fonction activatrice de AP-1 et de Pit-1. [less ▲]

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See detailRegulation under Financial Constraints
Gautier, Axel ULg

in Annals of Public and Cooperative Economics = Annales de l'Economie Publique, Sociale et Coopérative (2004), 75(4), 645-656

This article studies a simple procurement problem (Laffont and Tirole, 1993) where the regulator faces a cash-in-advance constraint. The introduction of such a constraint not only reduces the amount of ... [more ▼]

This article studies a simple procurement problem (Laffont and Tirole, 1993) where the regulator faces a cash-in-advance constraint. The introduction of such a constraint not only reduces the amount of public good provided but also limits the instruments available to the regulator. The wealth constraint could change the optimal regulatory contract from a two-part tariff, where the quantities produced depend on the firm's cost, to a less efficient fixed fee where the firm produces the same quantity whatever its cost. [less ▲]

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See detailRégulations de l'expression des gênes de la prolactine et de l'hormone de croissance dans des cellules hypophysaires en culture
Laverriere, J. N.; Tixier-Vidal, A.; Morin, Alexis ULg et al

in Annales d'Endocrinologie (1986), 47(1), 22-7

The rat pituitary tumor derived cell lines of the "GH" family offer a fruitful model for studying the expressions of the prolactin (rPRL) and growth hormone (rGH) genes in basic and regulated states. In ... [more ▼]

The rat pituitary tumor derived cell lines of the "GH" family offer a fruitful model for studying the expressions of the prolactin (rPRL) and growth hormone (rGH) genes in basic and regulated states. In order to assess the potential role of DNA methylation in the basic expressions of rPRL and rGH genes we have used different cell strains which produce either high level of rPRL (GH3B6 cells) or of rGH (GC cells) and minute amounts of both hormones (GH3CDL cells). The cleavage patterns generated by the methylation sensitive enzymes Hpa II and Msp I indicated an inverse correlation between the extent of gene methylation and the level of expression. However the use of 5-azacytidine which decreases DNA methylation suggested a variable importance of gene methylation in the respective control of rPRL and rGH genes depending on the cell lines. In an other hand we attempted to elucidate some of the mechanisms by which thyroliberin (TRH) enhances rPRL gene transcription in GH3B6 cells. Preliminary results indicated that the persistent occupancy of the TRH receptors was required to sustain at least for the first 5 hours the increased rate of rPRL gene transcription. In addition the possible relationship between the TRH-induced acute rPRL release and the stimulation of rPRL gene transcription was investigated. The results suggested that the activators of the C kinase-mediated pathway which are actually involved in the stimulation of the acute release were not sufficient alone for eliciting the maximum TRH response at the gene level. [less ▲]

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See detailLes régulations temporelles acquises : quelques apports expérimentaux récents
Lejeune, Helga ULg; Mantanus, H.; Deliège, M. et al

in Feuillets Psychiatriques de Liège (1976), 9(2), 147-156

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See detailRégulations temporelles simples chez des malades mentaux
Denys, W.; Richelle, Marc ULg

in Schweizerische Zeitschrift für Psychologie und ihre Andwendungen = Revue Suisse de Psychologie, Pure et Appliquée (1965), 24(3), 263-267

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See detailRegulatory capacities of a broiler and layer strain exposed to high CO2 levels during the second half of incubation.
Everaert, Nadia ULg; Willemsen, Hilke; Kamers, Bram et al

in Comparative biochemistry and physiology. Part A, Molecular & integrative physiology (2011), 158(2), 215-20

It has been shown that during embryonic chicken (Gallus gallus) development, the metabolism of broiler embryos differs from that of layers in terms of embryonic growth, pCO2/pO2 blood levels, heat ... [more ▼]

It has been shown that during embryonic chicken (Gallus gallus) development, the metabolism of broiler embryos differs from that of layers in terms of embryonic growth, pCO2/pO2 blood levels, heat production, and heart rate. Therefore, these strains might adapt differently on extreme environmental factors such as exposure to high CO2. The aim of this study was to compare broiler and layer embryos in their adaptation to 4% CO2 from embryonic days (ED) 12 to 18. Due to hypercapnia, blood pCO2 increased in both strains. Blood bicarbonate concentration was ~10 mmol/L higher in embryos exposed to high CO2 of both strains, while the bicarbonates of broilers had ~5 mmol/L higher values than layer embryos. In addition, the pH increased when embryos of both strains were exposed to CO2. Moreover, under CO2 conditions, the blood potassium concentration increased in both strains significantly, reaching a plateau at ED14. At ED12, the layer strain had a higher increase in CAII protein in red blood cells due to incubation under high CO2 compared to the broiler strain, whereas at ED14, the broiler strain had the highest increase. In conclusion, the most striking observation was the similar mechanism of broiler and layer embryos to cope with high CO2 levels. [less ▲]

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See detailRegulatory elements controlling pituitary-specific expression of the human prolactin gene
Peers, Bernard ULg; Voz, Marianne ULg; Monget, Philippe et al

in Molecular & Cellular Biology (1990), 10(9), 4690-700

We have performed transfection and DNase I footprinting experiments to investigate pituitary-specific expression of the human prolactin (hPRL) gene. When fused to the chloramphenicol acetyltransferase ... [more ▼]

We have performed transfection and DNase I footprinting experiments to investigate pituitary-specific expression of the human prolactin (hPRL) gene. When fused to the chloramphenicol acetyltransferase (CAT) reporter gene, 5,000 base pairs of the 5'-flanking sequences of the hPRL gene were able to drive high cat gene expression in prolactin-expressing GH3B6 cells specifically. Deletion analysis indicated that this pituitary-specific expression was controlled by three main positive regulatory regions. The first was located just upstream from the TATA box between coordinates -40 and -250 (proximal region). We have previously shown that three motifs of this region bind the pituitary-specific Pit-1 factor. The second positive region was located in the vicinity of coordinates -1300 to -1750 (distal region). DNase I footprinting assays revealed that eight DNA motifs of this distal region bound protein Pit-1 and that two other motifs were recognized by ubiquitous factors, one of which seems to belong to the AP-1 (jun) family. The third positive region was located further upstream, between -3500 and -5000 (superdistal region). This region appears to enhance transcription only in the presence of the distal region. [less ▲]

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See detailRegulatory issues surrounding the temporary authorisation of animal vaccination in emergency situations: the example of bluetongue in Europe
Saegerman, Claude ULg; Hubaux, M.; Urbain, B. et al

in Revue Scientifique et Technique (International Office of Epizootics) (2007), 26(2), 395-414

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See detailA regulatory mutation in IGF2 causes a major QTL effect on muscle growth in the pig
Van Laere, Anne-Sophie ULg; Nguyen, Minh Ngoc ULg; Braunschweig, M. et al

in Nature (2003), 425(6960), 832-836

Most traits and disorders have a multifactorial background indicating that they are controlled by environmental factors as well as an unknown number of quantitative trait loci (QTLs)(1,2). The ... [more ▼]

Most traits and disorders have a multifactorial background indicating that they are controlled by environmental factors as well as an unknown number of quantitative trait loci (QTLs)(1,2). The identification of mutations underlying QTLs is a challenge because each locus explains only a fraction of the phenotypic variation(3,4). A paternally expressed QTL affecting muscle growth, fat deposition and size of the heart in pigs maps to the IGF2 (insulin-like growth factor 2) region(5,6). Here we show that this QTL is caused by a nucleotide substitution in intron 3 of IGF2. The mutation occurs in an evolutionarily conserved CpG island that is hypomethylated in skeletal muscle. The mutation abrogates in vitro interaction with a nuclear factor, probably a repressor, and pigs inheriting the mutation from their sire have a threefold increase in IGF2 messenger RNA expression in postnatal muscle. Our study establishes a causal relationship between a single-base-pair substitution in a non-coding region and a QTL effect. The result supports the long-held view that regulatory mutations are important for controlling phenotypic variation(7). [less ▲]

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See detailRegulatory requirements : clinical evaluation of drug therapy
Reginster, Jean-Yves ULg; Avouac, Bernard; Gosset, Christiane ULg

in Reginster, Jean-Yves; Pelletier, J. P.; Martel-Pelletier, J. (Eds.) et al Experimental and Clinical Aspects of Osteoarthritis (1998)

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See detailRegulatory role of nitric acid (NO) in chondrocyte responses to cytokines
Henrotin, Yves ULg; Zheng, SX; Deby, G et al

in BONE (1998), 23(S5), 344

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See detailRegulatory sequences in the human prolactin gene
Martial, Joseph ULg; Truong, A. T.; Eliard, P. et al

in Labrie, F.; Proulx, L. (Eds.) Endocrinology 1984 (1984)

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See detailRegulatory T cells fulfil their promise ?
Humblet, Stéphanie ULg; Baron, Frédéric ULg; Liston, Adrian

in Immunology & Cell Biology (2011)

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See detailRéguler et financer croyances et convictions en Europe aujourd’hui : nouvelles questions ou vieilles lunes ?
Husson, Jean-François ULg

Conference (2011, April 02)

Ce colloque, organisé par le Pr François Foret (ULB), visait à aborder divers aspects des relations Eglises-Etats. Ma contribution portait sur le financement des cultes et des communautés non ... [more ▼]

Ce colloque, organisé par le Pr François Foret (ULB), visait à aborder divers aspects des relations Eglises-Etats. Ma contribution portait sur le financement des cultes et des communautés non confessionnelles comme indicateur des relations entre pouvoirs publics et acteurs convictionnels. Les conséquences, attendues et inattendues, du financement étaient ensuite discutées. [less ▲]

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See detailRéguler la finance ? De la communication de crise à l'économie réelle
Geuens, Geoffrey ULg

Conference given outside the academic context (2013)

Detailed reference viewed: 52 (15 ULg)