0000000000420114

AUTHOR

Celia Andreu-agulló

showing 3 related works from this author

Pigment epithelium-derived factor is a niche signal for neural stem cell renewal.

2006

Adult stem cells are characterized by self-renewal and multilineage differentiation, and these properties seem to be regulated by signals from adjacent differentiated cell types and by extracellular matrix molecules, which collectively define the stem cell "niche." Self-renewal is essential for the lifelong persistence of stem cells, but its regulation is poorly understood. In the mammalian brain, neurogenesis persists in two germinal areas, the subventricular zone (SVZ) and the hippocampus, where continuous postnatal neuronal production seems to be supported by neural stem cells (NSCs). Here we show that pigment epithelium-derived factor (PEDF) is secreted by components of the murine SVZ a…

TelencephalonCellular differentiationSubventricular zoneBiologyHippocampusMicePEDFEpendymaLateral VentriclesChlorocebus aethiopsmedicineAnimalsHumansNerve Growth FactorsEye ProteinsCells CulturedSerpinsCell ProliferationInjections IntraventricularNeuronsNeuronal PlasticityGeneral NeuroscienceStem CellsNeurogenesisCell CycleCell DifferentiationNeural stem cellmedicine.anatomical_structurenervous systemCOS CellsEndothelium VascularStem cellNeuroscienceCell DivisionAstrocyteAdult stem cellSignal TransductionNature neuroscience
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Vascular niche factor PEDF modulates Notch-dependent stemness in the adult subependymal zone.

2009

We sought to address the fundamental question of how stem cell microenvironments can regulate self-renewal. We found that Notch was active in astroglia-like neural stem cells (NSCs), but not in transit-amplifying progenitors of the murine subependymal zone, and that the level of Notch transcriptional activity correlated with self-renewal and multipotency. Moreover, dividing NSCs appeared to balance renewal with commitment via controlled segregation of Notch activity, leading to biased expression of known (Hes1) and previously unknown (Egfr) Notch target genes in daughter cells. Pigment epithelium-derived factor (PEDF) enhanced Notch-dependent transcription in cells with low Notch signaling,…

Cell divisionTranscription GeneticNotch signaling pathwayGene ExpressionBiologyMicePEDFEpendymaSubependymal zoneBasic Helix-Loop-Helix Transcription FactorsAnimalsNuclear Receptor Co-Repressor 1Nerve Growth FactorsProgenitor cellHES1Receptor Notch1Eye ProteinsCells CulturedSerpinsHomeodomain ProteinsNeuronsTranscription Factor HES-1General NeuroscienceAge FactorsTranscription Factor RelACell DifferentiationNeural stem cellErbB ReceptorsAdult Stem CellsTranscription Factor HES-1NeuroscienceSignal TransductionNature neuroscience
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A combined ex/in vivo assay to detect effects of exogenously added factors in neural stem cells.

2007

We describe a protocol developed/modified by our group for the ex vivo and in vivo assessment of the response to a soluble factor of murine neural stem cells from the adult sub-ventricular zone (SVZ). The procedure includes several experimental options that can be used either independently or in combination. Potential factor effects on self-renewal, survival and proliferation are assayed by means of neurosphere cultures, with the factor administered directly in vitro to the culture plates (Step 1) or infused in vivo immediately before tissue dissociation (Step 3). We also use bromodeoxiuridine (BrdU) retention to label slowly dividing cells in vivo and subsequently perform two different typ…

NeuronsStaining and LabelingStem CellsImmunocytochemistryTransfectionBiologyImmunohistochemistryGeneral Biochemistry Genetics and Molecular BiologyIn vitroNeural stem cellCell biologyCerebral VentriclesMiceBromodeoxyuridineIn vivoNeurosphereAnimalsIntercellular Signaling Peptides and ProteinsStem cellEx vivoCells CulturedNature protocols
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