Tatyana N Ignatova

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An important milestone in brain development is the transition of neuroprogenitor cells to postmitotic neurons. We report that the bZIP transcription factor ATF5 plays a major regulatory role in this process. In developing brain ATF5 expression is high within ventricular zones containing neural stem and progenitor cells and is undetectable in postmitotic(More)
Neural stem/progenitor cells are clonogenic in vitro and produce neurospheres in serum-free medium containing epidermal growth factor (EGF) and fibroblast growth factor (FGF2). Here, we demonstrate that lysophosphatidic acid (LPA) instigated the clonal generation of neurospheres from dissociated mouse postnatal forebrain in the absence of EGF and FGF2. LPA(More)
The mechanisms that regulate neural progenitor cell differentiation are primarily unknown. The transcription factor activating transcription factor 5 (ATF5) is expressed in neural progenitors of developing brain but is absent from mature astrocytes and neurons. Here, we demonstrate that ATF5 regulates the conversion of ventricular zone (VZ) and(More)
The transcription factor ATF5 is expressed in cells of the embryonic and neonatal ventricular zone/subventricular zone (VZ/SVZ), and must be down-regulated for their differentiation into neurons and astrocytes. Here, we show that ATF5 plays a major role in directing oligodendrocyte development. ATF5 is expressed by oligodendrocyte precursors but is absent(More)
In breast cancer, distinct expression profiles of microRNAs (miRNAs) have been associated with molecular subgroups and clinicopathological characteristics, implicating a diagnostic and prognostic role of miRNAs. However, the biological functions of deregulated miRNAs in tumor progression are not yet completely defined. In this study, we investigated the(More)
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