References of "Rogister, Bernard"
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See detailLa chirurgie du thymus normal, involué ou tumoral
Limet, Raymond ULg; Rogister, Bernard ULg

in Revue Médicale de Liège (2001), 55

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See detailNeuregulin signaling regulates neural precursor growth and the generation of oligodendrocytes in vitro
Calaora, Viviane; Rogister, Bernard ULg; Bismuth, Karen et al

in Journal of Neuroscience (2001), 21

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See detailThe SH2 domain containing 5-phosphatase SHIP2 is expressed in the germinal layers of embryo and adult mouse brain : increased expression in N_CAM deficient mice.
Muraille, Eric; Dassesse, Donald; Vanderwinden, Jean-Marie et al

in Neuroscience (2001), 105

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See detailMicroexplant cultures of the cerebellum
Rogister, Bernard ULg; Moonen, Gustave ULg

in Feoroff, Serguei; Richardson, Arleen (Eds.) Protocols for neural cell cultures (2001)

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See detailA 295-Kda Intermediate Filament-Associated Protein in Radial Glia and Developing Muscle Cells in Vivo and in Vitro
Chanas-Sacre, Grazyna; Thiry, Marc ULg; Pirard, Sandrine et al

in Developmental Dynamics : An Official Publication of the American Association of Anatomists (2000), 219(4), 514-25

The RC2 antibody is frequently used to label mouse radial glial cells in all parts of the nervous system where neuronal migration occurs during embryonic and early postnatal life. The antigen recognized ... [more ▼]

The RC2 antibody is frequently used to label mouse radial glial cells in all parts of the nervous system where neuronal migration occurs during embryonic and early postnatal life. The antigen recognized by this antibody still needs to be identified. We have characterized further its localization in vivo, its expression and subcellular localization in vitro, as well as its molecular nature. Histologic investigations of whole mouse embryos reveal an equally intense expression of RC2 immunostaining in radial glial cells in brain and spinal cord and in skeletal muscle. In glial cells cultures, the RC2 antibody recognizes an epitope located on the glial cytoskeleton and identified as an intermediate filament associated protein (IFAP) at the ultrastructural level. RC2 immunostaining in those cells is strongly dependent on the presence of a serum-derived activity. Serum-removal causes a decrease of the staining while adding serum back to the cells induces reexpression of RC2 immunoreactivity. By Western blotting, we find that in intermediate filament (IF) preparations obtained from cultured cerebellar glia, the RC2 antibody recognizes a 295-kDa protein whose expression is also dependent on the presence of serum in culture medium. In developing muscle cells, RC2 immunostaining is observed from the myoblast stage and disappears after complete myotube fusion. Both in vivo and in vitro, staining is first seen as a loose capping around myoblasts nuclei and progressively concentrates into Z-disks in association with the muscle IF protein desmin. The RC2 antibody also recognizes a 295-kDa protein band in muscle tissue protein extracts. Thus, the RC2 antibody recognizes a developmentally regulated cytoskeletal protein that is expressed, like other previously identified IFAPs, by cells of the glial and myogenic lineages and whose expression in vitro seems to be controlled by a signaling mechanism known to modulate astroglial morphology. [less ▲]

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See detailLa chirurgie du thymus, normal, involue ou tumoral
Limet, Raymond ULg; Rogister, Bernard ULg

in Revue Médicale de Liège (2000), 55(10), 940-4

Thymoma is the most frequently resected mediastinal tumor. Its malignancy is related more to macroscopical findings than to microscopical analysis. All thymomas should be resected, in order to prevent ... [more ▼]

Thymoma is the most frequently resected mediastinal tumor. Its malignancy is related more to macroscopical findings than to microscopical analysis. All thymomas should be resected, in order to prevent malignant degeneration. Furthermore, for the treatment of myasthenia, several centers recommend resection of the thymus, either tumoral (thymoma) or atrophied. Although the role of surgery in this regard is controversial, all authors unanimously stress that complete resection of all thymic remnants is essential to achieve adequate results. [less ▲]

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See detailGrowth Regulation of Astrocytes and C6 Cells by Tgfbeta1: Correlation with Gap Junctions
Robe, Pierre ULg; Rogister, Bernard ULg; Merville, Marie-Paule ULg et al

in Neuroreport (2000), 11(13), 2837-41

Transforming growth factor (TGF) beta1 enhanced in vitro [3H]thymidine incorporation into C6 cells and reduced that of astrocytes in the presence of a high serum concentration. It concomitantly raised the ... [more ▼]

Transforming growth factor (TGF) beta1 enhanced in vitro [3H]thymidine incorporation into C6 cells and reduced that of astrocytes in the presence of a high serum concentration. It concomitantly raised the gap junction intercellular communication (GJIC) in normal astrocytes but reduced the coupling of C6 cells, and respectively increased or decreased the proportion of P2-phosphorylated connexin (Cx) 43 isoform in these cells. Finally, octanol, which inhibited GJIC in both cell types, increased the thymidine incorporation in C6 cells, but neither altered the proliferation of astrocytes nor their response to TGFbeta1. These data indicate that an inhibition of gap junction intercellular communication, due to an altered phosphorylation of connexin 43, may contribute to the proliferative response of C6 glioblastoma cells to TGFbeta1. [less ▲]

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See detailRadial Glia Phenotype: Origin, Regulation, and Transdifferentiation
Chanas-Sacre, Grazyna; Rogister, Bernard ULg; Moonen, Gustave ULg et al

in Journal of Neuroscience Research (2000), 61(4), 357-63

Radial glial cells play a major guidance role for migrating neurons during central nervous system (CNS) histogenesis but also play many other crucial roles in early brain development. Being among the ... [more ▼]

Radial glial cells play a major guidance role for migrating neurons during central nervous system (CNS) histogenesis but also play many other crucial roles in early brain development. Being among the earliest cells to differentiate in the early CNS, they provide support for neuronal migration during embryonic brain development; provide instructive and neurotrophic signals required for the survival, proliferation, and differentiation of neurons; and may be multipotential progenitor cells that give rise to various cell types, including neurons. Radial glial cells constitute a major cell type of the developing brain in numerous nonmammalian and mammalian vertebrates, increasing in complexity in parallel with the organization of the nervous tissue they help to build. In mammalian species, these cells transdifferentiate into astrocytes when neuronal migration is completed, whereas, in nonmammalian species, they persist into adulthood as a radial component of astroglia. Thus, our perception of radial glia may have to change from that of path-defining cells to that of specialized precursor cells transiently fulfilling a guidance role during brain histogenesis. In that respect, their apparent change of phenotype from radial fiber to astrocyte probably constitutes one of the most common transdifferentiation events in mammalian development. [less ▲]

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See detailGlycine Triggers an Intracellular Calcium Influx in Oligodendrocyte Progenitor Cells Which Is Mediated by the Activation of Both the Ionotropic Glycine Receptor and Na+-Dependent Transporters
Belachew, Shibeshih ULg; Malgrange, Brigitte ULg; Rigo, Jean-Michel et al

in European Journal of Neuroscience (2000), 12(6), 1924-30

Using fluo-3 calcium imaging, we demonstrate that glycine induces an increase in intracellular calcium concentration ([Ca2+]i) in cortical oligodendrocyte progenitor (OP) cells. This effect results from a ... [more ▼]

Using fluo-3 calcium imaging, we demonstrate that glycine induces an increase in intracellular calcium concentration ([Ca2+]i) in cortical oligodendrocyte progenitor (OP) cells. This effect results from a calcium entry through voltage-gated calcium channels (VGCC), as it is observed only in OP cells expressing such channels, and it is abolished either by removal of calcium from the extracellular medium or by application of an L-type VGCC blocker. Glycine-triggered Ca2+ influx in OP cells actually results from an initial depolarization that is the consequence of the activation of both the ionotropic glycine receptor (GlyR) and Na+-dependent transporters, most probably the glycine transporters 1 (GLYT1) and/or 2 (GLYT2) which are colocalized in these cells. Through this GlyR- and transporter-mediated effect on OP intrcellular calcium concentration [Ca2+]i, glycine released by neurons may, as well as other neurotransmitters, serve as a signal between neurons and OP during development. [less ▲]

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See detailContribution à l'étude de la gliogenèse - Perspectives physiopathologiques et thérapeutiques
Rogister, Bernard ULg

Thèse d’agrégation de l’enseignement supérieur (2000)

In this work, we demonstrated that neonatal cortical progenitors characterized by an expression of a polysialilated form on NCAM (Neural Cell Adhesion Molecule) are able to differentiate into astrocytes ... [more ▼]

In this work, we demonstrated that neonatal cortical progenitors characterized by an expression of a polysialilated form on NCAM (Neural Cell Adhesion Molecule) are able to differentiate into astrocytes or oligodendrocytes. Moreover, those precursors are able of a phenotypic plasticity as they differnetiate into Schwann Cells when grafted into adult demyelinated lesions. [less ▲]

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See detailIdentification of Psf, the Polypyrimidine Tract-Binding Protein-Associated Splicing Factor, as a Developmentally Regulated Neuronal Protein
Chanas-Sacre, Grazyna; Mazy-Servais, Cécile; Wattiez, Ruddy et al

in Journal of Neuroscience Research (1999), 57(1), 62-73

The polypyrimidine tract-binding protein-associated splicing factor (PSF), which plays an essential role in mammalian spliceosomes, has been found to be expressed by differentiating neurons in developing ... [more ▼]

The polypyrimidine tract-binding protein-associated splicing factor (PSF), which plays an essential role in mammalian spliceosomes, has been found to be expressed by differentiating neurons in developing mouse brain. The sequence of a fragment of mouse PSF was found to be remarkably similar to that of human PSF. Both the expression of PSF mRNA in cortex and cerebellum and PSF immunoreactivity in all brain areas were high during embryonic and early postnatal life and almost disappeared in adult tissue, except in the hippocampus and olfactory bulb where various neuronal populations remained PSF-immunopositive. Double-labeling experiments with anti-PSF antibody and anti-neurofilaments or anti-glial fibrillary acidic protein antibodies on sections of cortex, hippocampus, and cerebellum indicate that PSF is expressed by differentiating neurons but not by astrocytic cells. In vitro, mouse PSF was found to be expressed by differentiating cortical and cerebellar neurons. Radial glia or astrocyte nuclei were not immunopositive; however, oligodendrocytes differentiating in vitro were found to express PSF. The restricted expression of PSF suggests that this splicing factor could be involved in the control of neuronal-specific splicing events occurring at particular stages of neuronal differentiation and maturation. [less ▲]

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See detailNeurotransmitter-Mediated Regulation of Cns Myelination: A Review
Belachew, Shibeshih ULg; Rogister, Bernard ULg; Rigo, Jean-Michel et al

in Acta Neurologica Belgica (1999), 99(1), 21-31

In addition to treatments aimed at preventing or limiting damage to myelin and oligodendrocytes, there is a crucial need for repair strategies in human demyelinating disorders. There is increasing ... [more ▼]

In addition to treatments aimed at preventing or limiting damage to myelin and oligodendrocytes, there is a crucial need for repair strategies in human demyelinating disorders. There is increasing evidence that besides growth factors, neurotransmitters can regulate different steps of the oligodendrogliogenesis. The present review on neurotransmitter receptor expression and function in the oligodendrocyte lineage emphasizes the concept that in this lineage cell proliferation and differentiation can be controlled through the modulation of the functional state of channel proteins and receptors, such as the delayed K+ rectifier, the AMPA/kainate, dopamine or muscarinic receptors, and, most likely, others yet to be found. We anticipate that a better understanding of the neurotransmitter-mediated neuronal oligodendroglial communication network opens prospects in the field of central nervous system (CNS) myelin repair, allowing the recruitment of the myelinating machinery that is known to remain present but quiescent in the CNS of multiple sclerosis patients. [less ▲]

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See detailOligodendrocytes: From Development to Demyelinated Lesion Repair
Rogister, Bernard ULg; Belachew, Shibeshih ULg; Moonen, Gustave ULg

in Acta Neurologica Belgica (1999), 99(1), 32-9

Spontaneous but incomplete remyelination is observed after a demyelinating lesion. We know since ten years now that oligodendrocyte progenitors, (OP) and totipotent neural stem cells remain present in the ... [more ▼]

Spontaneous but incomplete remyelination is observed after a demyelinating lesion. We know since ten years now that oligodendrocyte progenitors, (OP) and totipotent neural stem cells remain present in the central nervous system of adult mammals. [less ▲]

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See detailFrom Neural Stem Cells to Myelinating Oligodendrocytes
Rogister, Bernard ULg; Ben Hur, Tamir; Dubois-Dalcq, Monique

in Molecular & Cellular Neuroscience [=MCN] (1999), 14

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See detailCultured Oligodendrocyte Progenitors Derived from Cerebral Cortex Express a Glycine Receptor Which Is Pharmacologically Distinct from the Neuronal Isoform
Belachew, Shibeshih ULg; Rogister, Bernard ULg; Rigo, Jean-Michel et al

in European Journal of Neuroscience (1998), 10(11), 3556-64

Using the whole-cell patch-clamp technique, we demonstrate glycine-induced currents in oligosphere-derived oligodendrocyte progenitors cultured from newborn rats. Similar inward currents are also ... [more ▼]

Using the whole-cell patch-clamp technique, we demonstrate glycine-induced currents in oligosphere-derived oligodendrocyte progenitors cultured from newborn rats. Similar inward currents are also triggered by beta-alanine and taurine, two established glycine receptor agonists. In our recording conditions, glycine-gated currents in oligodendrocyte progenitors reverse about 0 mV and are reversibly inhibited by the glycine competitive antagonist strychnine, the Cl- channel blocker picrotoxinin and the non-competitive antagonist cyanotriphenylborate. The oligodendrocyte progenitors glycine receptor (GlyR) differs from the corresponding neuronal receptor: [3H]strychnine binding data and the strychnine inhibition curve of glycine-induced currents in oligodendrocyte progenitor cultures suggest the existence of two strychnine binding sites on the oligodendroglial GlyR. Using total RNA isolated from oligodendrocyte progenitors cultures, reverse transcription-polymerase chain reaction analysis of glycine receptor subunit expression shows the presence of alpha2 and beta subunits and immunocytochemical stainings confirm that this GlyR contains an alpha subunit which is not alpha1. The molecular structure of the oligodendroglial GlyR could be either homopentameric alpha2 or heteromeric alpha2beta but in both cases, the sequence of the alpha2 or beta subunits have to be different from the known neuronal sequences in order to explain, respectively, the cyanotriphenylborate (alpha2) and picrotoxinin (beta) sensitivities. This work thus demonstrates that GlyR are expressed by oligodendrocytes obtained not only from spinal cord but also from supraspinal structures. The pharmacological properties and presumably the molecular structure of oligodendroglial GlyR are original. The physiological meaning of the presence of such receptors on developing and mature oligodendrocytes remains unknown. [less ▲]

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See detailExpression of Growth Factors and Their Receptors in the Postnatal Rat Cochlea
Malgrange, Brigitte ULg; Rogister, Bernard ULg; Lefebvre, P. P. et al

in Neurochemical Research (1998), 23(8), 1133-8

RT-PCR was used to assay for growth factors and receptors from seven different protein families in cochlea tissues of the juvenile rat. There was a broad representation of the growth factor families in ... [more ▼]

RT-PCR was used to assay for growth factors and receptors from seven different protein families in cochlea tissues of the juvenile rat. There was a broad representation of the growth factor families in all the cochlea tissues examined, though the organ of Corti and stria vascularis expressed a greater variety than the spiral ganglion. This broad expression suggests that a variety of known growth factors play significant roles in the development, maintenance, and repair of the inner ear. The results of this survey serve as a basis for the design of future in vitro experiments that will address the ability of growth factors to protect hair cells from damage and to evoke a repair-regeneration response by injured hair cells. [less ▲]

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See detailDevelopmental Regulation of Neuroligand-Induced Responses in Cultured Oligodendroglia
Belachew, Shibeshih ULg; Malgrange, Brigitte ULg; Rigo, Jean-Michel et al

in Neuroreport (1998), 9(6), 973-80

Using whole-cell patch-clamp techniques, we show that oligosphere-derived oligodendrocyte progenitor cells (OP) display GABA-, glutamate-, 5-HT-, glycine- and acetylcholine-gated inward currents. When OP ... [more ▼]

Using whole-cell patch-clamp techniques, we show that oligosphere-derived oligodendrocyte progenitor cells (OP) display GABA-, glutamate-, 5-HT-, glycine- and acetylcholine-gated inward currents. When OP differentiate into oligodendrocytes (ODC), the amplitude of peak currents elicited by saturating concentrations of these transmitters decreases except for 5-HT. Intracellular Ca2+ concentration changes induced by microperfusion of glutamate, 5-HT, TRH, met-enkephalin and substance P were monitored using a fluo-3-based calcium imaging system. When OP cells differentiate into ODC, a global decrease of the proportion of responding cells is observed. During type-2 astrocytes commitment, this proportion decreases for 5-HT, TRH- and metenkephalin stimulations whereas it remains constant for substance P and glutamate. These data demonstrate a development regulation of neurotransmitter- and neuropeptide-induced responses within the oligodendroglial lineage. [less ▲]

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See detailGrowth and fate of PSA-NCAM+ precursors of the postnatal brain
Ben Hur, Tamir; Rogister, Bernard ULg; Murray, Kerren et al

in Journal of Neuroscience (1998), 18

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See detailEffect of neuropeptides on cultured postnatal auditory neurons.
Malgrange, Brigitte ULg; Lefebvre, P.P.; Rigo, J.M. et al

Conference (1997)

Detailed reference viewed: 19 (7 ULg)