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See detailIdentification and characterization of angiotensin-II receptor subtypes in cultured bovine and human adrenal fasciculata cells and PC12W cells.
Ouali, R.; LEBRETHON, Marie-Christine ULg; Saez, J. M.

in Endocrinology (1993), 133(6), 2766-72

Angiotensin-II (Ang II) receptor subtypes (AT1 and AT2) were analyzed in bovine adrenal cells (BAC) by binding and cross-linking experiments using [125I]Ang II and [125I]CGP42112, a specific ligand of AT2 ... [more ▼]

Angiotensin-II (Ang II) receptor subtypes (AT1 and AT2) were analyzed in bovine adrenal cells (BAC) by binding and cross-linking experiments using [125I]Ang II and [125I]CGP42112, a specific ligand of AT2 receptors. [125I]Ang II binding was reduced by 80% and 20% in the presence of maximal concentrations of the AT1 antagonist losartan (DuP 753) and CGP42112, respectively, whereas [125I]CGP42112 binding was inhibited by Ang II or CGP42112, but not by losartan. In the presence of the reducing agent dithio-1,4-erythritol, the binding of [125I] CGP42112 was increased 2-fold; this was due to an increase in the binding affinity (Kd, 8 +/- 4 x 10(-10) vs. 4.8 +/- 1.2 x 10(-10) M). Cross-linking of [125I]Ang II to BAC in the presence of disuccinimidyl suberate, followed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, revealed a band of 70,000 +/- 8,000 mol wt (M(r)) under both reducing and nonreducing conditions. This band disappeared when the incubation was performed in the presence of 10(-6) M Ang II or 5 x 10(-8) M CGP42112, but not in the presence of 10(-5) M losartan. Dithio-1,4-erythritol (10 mM) markedly enhanced the band. After cross-linking with 1,5-difluoro-2,4-dinitrobenzene and solubilization of the cells in the presence of protease inhibitors, two radioactive bands were observed with M(r) of 70,000 and 50,000. The first disappeared after the addition of Ang II or CGP42112, whereas the second disappeared in the presence of Ang II or losartan, but not in the presence of CGP42112. Cross-linking of [125I]AngII to either human adrenal fasciculata-reticularis cells, which contain only AT1 sites, or COS-7 cells transfected with human AT1 cDNA revealed a major band of 50,000 M(r) that was blunted by Ang II or losartan, but not by CGP42112. Moreover, cross-linking of [125I]Ang II to PC12W cells, which contain only the AT2 receptor subtype, revealed a single radioactive band of 70,000 Mr that was blunted by CGP42112 but not by losartan. Thus, in both BAC and PC12W cells, the AT2 receptor has a M(r) of 70,000, whereas the AT1 receptor in BAC, human adrenal cells, and cells transfected with human AT1 receptor cDNA has a Mr of 50,000. Therefore, the heterogeneity of the size of the Ang II receptor previously reported after photoaffinity or cross-linking was probably due to only to a variation in the degree of glycosylation between tissues and species, but also to the presence of two different receptor subtypes. [less ▲]

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See detailIdentification and Characterization of Bovine Herpesvirus Type 5 Glycoprotein H Gene and Gene Products
Meyer, Gilles; Bare, O.; Thiry, Etienne ULg

in Journal of General Virology (The) (1999), 80(Pt 11), 2849-59

Bovine herpesvirus type 5 (BHV-5) is the causative agent of a fatal meningo-encephalitis in calves and is closely related to BHV-1 which causes infectious bovine rhinotracheitis. The gene encoding BHV-5 ... [more ▼]

Bovine herpesvirus type 5 (BHV-5) is the causative agent of a fatal meningo-encephalitis in calves and is closely related to BHV-1 which causes infectious bovine rhinotracheitis. The gene encoding BHV-5 glycoprotein gH was sequenced. A high degree of conservation was found between BHV-1 and BHV-5 deduced gH amino acid sequences (86. 4%), which is also observed for all alphaherpesvirus gH sequences. Transcriptional analysis revealed a 3.1 kb mRNA as the specific gH transcript which was detected 2 h post-infection (p.i.). Twelve out of twenty-one MAbs directed against BHV-1 gH immunoprecipitated a 108-110 kDa glycoprotein, which was then designated BHV-5 gH. Synthesis and intracellular processing of BHV- 5 gH was analysed in infected MDBK cells using gH cross-reacting MAbs. Glycoprotein gH was expressed as a beta-gamma protein, detected by radioimmunoprecipitation as early as 3 h p.i. Glycosylation studies indicated that BHV-5 gH contains N-linked carbohydrates which are essential for the recognition of the protein by the MAbs. This suggests that N-linked glycans are involved in protein folding or are targets for the gH cross-reacting MAbs. Plaque- reduction neutralization assays showed that at least one BHV-1 gH antigenic domain is lacking in BHV-5 which may possibly relate to in vivo differences in virus tropism. [less ▲]

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See detailIdentification and characterization of drought stress responsive genes in faba bean (Vicia faba L.) by suppression subtractive hybridization
Abid, Ghassen; Muhovski, Yordan; Mingeot, Dominique et al

in Plant Cell, Tissue & Organ Culture (2014)

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See detailIdentification and characterization of four splicing variants of ovine POUF1 gene
Bastos, Estella; Avila, S.; Cravador, Alfredo et al

in Gene (2006), 382

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See detailIdentification and Characterization of Glycoprotein Gp1 of Bovine Herpesvirus Type 4
Dubuisson, J.; Pastoret, Paul-Pierre ULg; Thiry, Etienne ULg

in Journal of General Virology (The) (1992), 73((Pt 5)), 1293-6

Three major bovine herpesvirus type 4 (BHV-4) glycoproteins have been described previously. By using monoclonal antibodies produced against BHV-4 envelope proteins from which the three major antigens had ... [more ▼]

Three major bovine herpesvirus type 4 (BHV-4) glycoproteins have been described previously. By using monoclonal antibodies produced against BHV-4 envelope proteins from which the three major antigens had been removed by immunoaffinity, a fourth glycoprotein was identified. This protein (gp1) has a high Mr (greater than 300K), is detected about 8 h post-inoculation of infected cells and is strictly expressed as a gamma protein. Moreover, gp1 was identified by a polyclonal antiserum from an infected animal, indicating that this glycoprotein is an antigen recognized by the immune system of infected animals. [less ▲]

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See detailIdentification and characterization of in vivo attenuated mutants of Brucella melitensis.
Lestrate, P.; Delrue, R. M.; DANESE, Isabelle ULg et al

in Molecular Microbiology (2000), 38(3), 543-51

Brucella melitensis 16M is a Gram-negative alpha2-proteobacterium responsible for abortion in goats and for Malta fever in humans. This facultative intracellular pathogen invades into and survives within ... [more ▼]

Brucella melitensis 16M is a Gram-negative alpha2-proteobacterium responsible for abortion in goats and for Malta fever in humans. This facultative intracellular pathogen invades into and survives within both professional and non-professional phagocytes. Signature-tagged mutagenesis (STM) was used to identify genes required for the in vivo pathogenesis of Brucella. A library of transposon mutants was screened in a murine infection model. Out of 672 mutants screened, 20 were not recovered after a 5 day passage in BALB/c mice. The attenuation of 18 mutants was confirmed using an in vivo competition assay against the wild-type strain. The 18 mutants were characterized further for their ability to replicate in murine macrophages and in HeLa cells. The sequences disrupted by the transposon in the mutants have homology to genes coding for proteins of different functional classes: transport, amino acid and DNA metabolism, transcriptional regulation, peptidoglycan synthesis, a chaperone-like protein and proteins of unknown function. The mutants selected in this study provide new insights into the molecular basis of Brucella virulence. [less ▲]

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See detailIdentification and characterization of mRNAs differentially expressed in thyroid cells stimulated by a mitogenic treatment
Pirson, I.; Behrens, J.; Savonet, V. et al

in Biochimie (1999), 81

he aim of our work is to identify new genes and proteins involved in the control of the proliferation of thyroid cells as putative protooncogenes and antioncogenes. Several strategies are discussed. A ... [more ▼]

he aim of our work is to identify new genes and proteins involved in the control of the proliferation of thyroid cells as putative protooncogenes and antioncogenes. Several strategies are discussed. A first study has allowed to identify three new genes. Further search will use the differential display and gene arrays methodology. The role of the identified proteins coded by the genes is studied in vitro by the search of partner proteins by the double hybrid method and in vivo by mice gene knockout technology [less ▲]

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See detailIdentification and characterization of new blood-accessible colorectal cancer biomarkers
Conrotto, Paolo; Roesli, Christoph; Rybak, J. et al

Conference (2008)

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See detailIdentification and characterization of novel galectin-9 splice variants in endothelial cells
Heusschen, Roy ULg; De Bree, Martijn; Griffioen, Arjan et al

in Angiogenesis (2011)

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See detailIdentification and characterization of novel galectin-9 splice variants in endothelial cells
Heusschen, Roy ULg; De Bree, Martijn; Griffioen, Arjan et al

Poster (2011)

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See detailIdentification and characterization of novel peptidoglycan glycosyltransferase inhibitors with antibacterial activity
Derouaux, Adeline ULg; Turk, Samo; Offant, Julien et al

Poster (2009, November)

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See detailIdentification and characterization of nuclear microsatellite loci in the aquatic moss Platyhypnidium
Hutsemekers, Virginie ULg; Risterucci, A. M.; Ricca, M. et al

in Molecular Ecology Resources (2008), 8

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See detailIdentification and comparison of proteome patterns of English Grain Aphids on resistant and susceptible wheat
Bosquée, Emilie ULg; Barrios San Martin, Joceline; C. RAMÍREZ, Claudio et al

Poster (2014, August)

Some varieties of wheat are resistant to some aphid clones of the English Grain Aphid (Sitobion avenae). This study used 2D-DIGE coupled with protein identification by Maldi-Tof-MS to compare the proteome ... [more ▼]

Some varieties of wheat are resistant to some aphid clones of the English Grain Aphid (Sitobion avenae). This study used 2D-DIGE coupled with protein identification by Maldi-Tof-MS to compare the proteome patterns of English Grain Aphids on resistant (Llareta) and susceptible (Huayún) wheat lines. Aphids were exposed to wheat during 2 weeks (short term: ST) and 4 weeks (long term: LT). Four treatments were compared: Llareta-ST, Llareta-LT, Huayún-ST, Huayún-LT. Experiment was conducted using different Sitobion avenae clones whose symbionts were previously characterized. Results showed that aphids had low performance on resistant plants. Seventy-two protein spots showed significant quantitative differences among the four treatment groups. Proteomic approach will allow a better understanding of interaction mechanisms between aphids and wheat. [less ▲]

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See detailIdentification and culture of human bronchial epithelial cells.
Stoner, G. D.; Katoh, Y.; Foidart, Jean-Michel ULg et al

in Methods in Cell Biology (1980), 21A

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See detailIdentification and determination of alkaloids in Fumaria Species from Romania
Paltinean, Ramona; Toju, A; Wauters, Jean-Noël ULg et al

in Digest Journal of Nanomaterials & Biostructures [=DJNB] (2013), 8(2), 817-824

Four Fumaria species (F. vaillantii Loisel, F. parviflora Lam., F. rostellata Knaf and F. jankae Hausskn.) were analysed in order to determine the presence of the isoquinoline alkaloids allocryptopine ... [more ▼]

Four Fumaria species (F. vaillantii Loisel, F. parviflora Lam., F. rostellata Knaf and F. jankae Hausskn.) were analysed in order to determine the presence of the isoquinoline alkaloids allocryptopine, chelidonine, protopine, bicuculline, sanguinarine, cheleritrine, stylopine, and hydrastine through an HPLC-DAD method. Protopine and sanguinarine were present in all extracts. Bicuculline and stylopine were found in F. vaillantii and F. parviflora, whilst chelidonine was identified only in F. vaillantii and hydrastine in F. jankae, so they represent potential taxonomic markers that differentiate the four plants. The richest species in isoquinoline alkaloids was F. parviflora. Our study showed significant differences between the four Fumaria species, both qualitative and quantitative. [less ▲]

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See detailIdentification and distribution of the readily soluble silicon pool in a temperate forest soil below three distinct tree species
Cornelis, Jean-Thomas ULg; titeux, Hugues; Ranger, Jacques et al

in Plant and Soil (2011), 342

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See detailIdentification and functional characterization of a novel αlpha-conotoxin (EIIA) from Conus ermineus
Quinton, Loïc ULg; Servent, Denis; Girard, Emmanuelle et al

in Analytical and Bioanalytical Chemistry (2013), 405

Nicotinic acetylcholine receptors (nAChRs) are one of the most important families in the ligand-gated ion channel superfamily due to their involvement in primordial brain functions and in several ... [more ▼]

Nicotinic acetylcholine receptors (nAChRs) are one of the most important families in the ligand-gated ion channel superfamily due to their involvement in primordial brain functions and in several neurodegenerative pathologies. The discovery of new ligands which can bind with high affinity and selectivity to nAChR subtypes is of prime interest in order to study these receptors and to potentially discover new drugs for treating various pathologies. Predatory cone snails of the genus Conus hunt their prey using venoms containing a large number of small, highly structured peptides called conotoxins. Conotoxins are classified in different structural families and target a large panel of receptors and ion channels. Interestingly, nAChRs represent the only subgroup for which Conus has developed seven distinct families of conotoxins. Conus venoms have thus received much attention as they could represent a potential source of selective ligands of nAChR subtypes. We describe the mass spectrometric based approaches which led to the discovery of a novel α-conotoxin targeting muscular nAChR from the venom of Conus ermineus. The presence of several posttranslational modifications complicated the N-terminal sequencing. To discriminate between the different possible sequences, analogs with variable N-terminus were synthesized and fragmented by MS/MS. Understanding the fragmentation pathways in the low m/z range appeared crucial to determine the right sequence. The biological activity of this novel α-conotoxin (α-EIIA) that belongs to the unusual α4/4 subfamily was determined by binding experiments. The results revealed not only its selectivity for the muscular nAChR, but also a clear discrimination between the two binding sites described for this receptor. [less ▲]

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See detailIdentification and interpersonal maturity : contribution to a developmental approach of juvenile delinquency
Van Poppel, E.; Born, Michel ULg

in Weitekamp, E. G. M. (Ed.) Cross-national longitudinal research on human development and criminal behavior (1994)

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