Endogenous oligodendrocyte progenitor cells (OPCs) are a promising target to improve functional recovery after spinal cord injury (SCI) by remyelinating denuded, and therefore vulnerable, axons. Demyelination is the result of a primary insult and secondary injury, leading to conduction blocks and long-term degeneration of the axons, which subsequently can lead to the loss of their neuron. In response to SCI, dormant OPCs can be activated and subsequently start to proliferate and differentiate into mature myelinating oligodendrocytes (OLs). Therefore, researchers strive to control OPC responses, and utilize small molecule screening approaches in order to identify mechanisms of OPC activation, proliferation, migration and differentiation. Overall design: DEG analysis of primary OPC and OL populations, 5 biological replicates per population
Primary Spinal OPC Culture System from Adult Zebrafish to Study Oligodendrocyte Differentiation <i>In Vitro</i>.
No sample metadata fields
View SamplesA surge of luteinizing hormone (LH) from the pituitary gland triggers ovulation, oocyte maturation, and luteinization for successful reproduction in mammals. Since the signaling molecules RAS and ERK1/2 are activated by a LH surge in granulosa cells of preovulatory follicles, we disrupted Erk1/2 in mouse granulosa cells and provide in vivo evidence that these kinases are necessary for LH-induced oocyte resumption of meiosis, ovulation, and luteinization. In addition, biochemical analyses and selected disruption of the Cebpb gene in granulosa cells demonstrate that C/EBP is a critical downstream mediator of ERK1/2 activation. These mouse models provide in vivo systems in which to define the context specific and molecular mechanisms by which granulosa cells respond to LH and these mechanisms are relevant to the regulation of human fertility and infertility.
MAPK3/1 (ERK1/2) in ovarian granulosa cells are essential for female fertility.
Age, Specimen part
View SamplesAGRP neurons are a hypothalamic population that senses physiological energy deficit and consequently increases appetite. Molecular and cellular processes for energy-sensing and elevated neuronal output are critical for understanding the central nervous system response to energy deficit states, such as during weight-loss. Cell type-specific transcriptomics can be used to identify pathways that counteract weight-loss but, in adult mice, this has been limited by technical challenges. We report high-quality gene expression profiles of AGRP neurons under well-fed and energy deficit states. For comparison, we also analyzed POMC neurons, an intermingled population that suppresses appetite. This data newly identifies cell type-selective involvement of signaling pathways, ion channels, neuropeptides, and G-protein coupled receptors. Combined with methods to validate and manipulate these pathways, this resource greatly expands molecular insight into neuronal regulation of body weight, and may be useful for devising therapeutic strategies for obesity and eating disorders. Overall design: Examination of 2 different neuronal cell types under 2 conditions.
Cell type-specific transcriptomics of hypothalamic energy-sensing neuron responses to weight-loss.
No sample metadata fields
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Rapid and efficient generation of oligodendrocytes from human induced pluripotent stem cells using transcription factors.
Specimen part
View SamplesWe demonstrate that the induction of three transcription factors (SOX10, OLIG2, NKX6.2) in hiPSC-derived neural progenitor cells (hiPSC-NPC) is sufficient to rapidly generate O4+ oligodendrocytes with an efficiency of 60 to 70% within 28 days.
Rapid and efficient generation of oligodendrocytes from human induced pluripotent stem cells using transcription factors.
Specimen part
View SamplesMurine healthy tissue samples, DCIS and invasive mammary tumors were analyzed in order to identify marker genes which show enhanced expresssion in DCIS and invasive ductal carcinomas.
Identification of early molecular markers for breast cancer.
Specimen part
View SamplesHuman healthy tissue samples, DCIS and invasive mammary tumors were analyzed in order to identify marker genes which show enhanced expresssion in DCIS and invasive ductal carcinomas.
Identification of early molecular markers for breast cancer.
Specimen part, Disease, Disease stage
View Sampleswe used technique that allows the molecular characterization of particular neuronal subpopulations based on their neuroanatomical projections and the locations of their cell bodies. This 'retro-TRAP' (translating ribosome affinity purification from retrogradely labeled neurons) approach relies on viral injection into an anatomical area targeted by the neurons of interest, followed by selective precipitation of ribosomes from retrogradely labeled cell bodies, and subsequent RNAseq analysis. Overall design: By comparing the mRNAs enriched in the NGC neurons which are retrogradely labeled due to viral injection into central thalamus, to gene expression of non-labeled surrounding cells in NGC, and then performing a comprehensive bioinformatics analysis of these results, we were able to identify genes enriched in these cells. This procedure allowed us to highlight genes and pathways unique to these neurons with projections ascending to thalamus, as compared to other cells in reticular NucleusGigantocellularis.
Molecular profiling of reticular gigantocellularis neurons indicates that eNOS modulates environmentally dependent levels of arousal.
Sex, Specimen part, Cell line, Subject
View SamplesNotch signaling is widely implicated in mouse mammary gland development and tumorigenesis. To investigate the effects of acute activation of Notch signaling in the mammary epithelial compartment, we generated bi-transgenic MMTV-rtTA; TetO-NICD1 (MTB/TICNX) mice that conditionally express a constitutively active NOTCH1 intracellular domain (NICD1) construct in the mammary epithelium upon doxycycline administration.
Notch promotes recurrence of dormant tumor cells following HER2/neu-targeted therapy.
Sex, Age, Specimen part, Treatment, Time
View SamplesThe original objectives of the study were to identify surface markers specifically expressed in motor neurons. We now use the data to profile the expression of Cdk family members in motor neurons.
Dual Inhibition of GSK3β and CDK5 Protects the Cytoskeleton of Neurons from Neuroinflammatory-Mediated Degeneration In Vitro and In Vivo.
Specimen part
View Samples