We show that mesenchymal CSC-like cells express an embryonic stem cell signature that is mutant p53 dependent Overall design: Examination of three p53 mutant mesenchymal stem cells and ten derived CSC-like cell lines and 2 derived p53 mutant KO clones compared to control clones
A Mutant p53-Dependent Embryonic Stem Cell Gene Signature Is Associated with Augmented Tumorigenesis of Stem Cells.
Specimen part, Cell line, Subject
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Epigenetic polymorphism and the stochastic formation of differentially methylated regions in normal and cancerous tissues.
Specimen part, Cell line
View SamplesDNA methylation has been comprehensively profiled in normal and cancer cells, but the dynamics that form, maintain and reprogram differentially methylated regions remain enigmatic. We show that methylation patterns within populations of cells from individual somatic tissues are heterogeneous and polymorphic. Using in vitro evolution of immortalized fibroblasts for over 300 generations, we track the dynamics of polymorphic methylation at regions developing significant differential methylation on average. The data indicate that changes in population-averaged methylation occur through a stochastic process that generates a stream of local and uncorrelated methylation aberrations. Despite the stochastic nature of the process, nearly deterministic epigenetic remodeling emerges on average at loci that lose or gain resistance to methylation accumulation. Changes in the susceptibility to methylation accumulation are correlated with changes in histone modifications and CTCF occupancy. Characterizing epigenomic polymorphism within cell populations is therefore critical for understanding methylation dynamics in normal and cancer cells.
Epigenetic polymorphism and the stochastic formation of differentially methylated regions in normal and cancerous tissues.
Specimen part, Cell line
View SamplesThere is differential expression of genes between cases and controls using microarray analysis, and genes that are crucial for host defence responses are significantly up-regulated in cases during pneumococcal infection.
Peripheral blood RNA gene expression in children with pneumococcal meningitis: a prospective case-control study.
Specimen part, Disease, Disease stage
View SamplesMutations in the CLN3 gene lead to juvenile neuronal ceroid lipofuscinosis, a pediatric neurodegenerative disorder characterized by visual loss, epilepsy and psychomotor deterioration. Although most CLN3 patients carry the same 1 kb deletion in the CLN3 gene, their disease phenotype can be variable. The aims of this study were (1) to identify genes that are dysregulated in CLN3 disease regardless of the clinical course that could be useful as biomarkers, and (2) to find modifier genes that affect the progression rate of the disease.
Analysis of potential biomarkers and modifier genes affecting the clinical course of CLN3 disease.
Sex, Age, Specimen part, Disease, Disease stage
View SamplesIn order to identify the gene targets of frequently altered chromosomal regions in retinoblastoma, a meta-analysis of genome-wide copy number alterations studies on primary retinoblastoma tissue and retinoblastoma cell lines was performed. Published studies were complemented by copy number and gene expression analysis on primary and cell line samples of retinoblastoma. This dataset includes the gene expression data of the retinoblastoma cell lines
A Meta-Analysis of Retinoblastoma Copy Numbers Refines the List of Possible Driver Genes Involved in Tumor Progression.
Specimen part, Cell line
View SamplesWe aimed to discover a combination of reliable and functionally important biomarkers of severe bacterial infection (SBI) using transcriptomics, and to evaluate their clinical validity.
Novel biomarker combination improves the diagnosis of serious bacterial infections in Malawian children.
Sex, Specimen part, Disease
View SamplesBackground
Loss of photoreceptorness and gain of genomic alterations in retinoblastoma reveal tumor progression.
Specimen part
View SamplesDirect conversion of somatic cells into neural stem cells (NSCs) by defined factors holds great promise for mechanistic studies, drug screening, and potential cell therapies for different neurodegenerative diseases. Here, we report that a single zinc-finger transcription factor, Zfp521, is sufficient for direct conversion of human fibroblasts into long-term self-renewable and multipotent NSCs. In vitro, Zfp521-induced NSCs maintained their characteristics in the absence of exogenous factor expression and exhibited morphological, molecular, developmental, and functional properties that were similar to control NSCs. Additionally, the single seeded induced NSCs were able to form NSC colonies with efficiency comparable to control NSCs and expressed NSC markers. The converted cells were capable of surviving, migrating and attaining neural phenotypes after transplantation into neonatal mouse- and adult rat brains, without forming tumors. Moreover, the Zfp521-induced NSCs predominantly expressed rostral genes. Our results suggest a facilitated approach for establishing human NSCs through Zfp521-driven conversion of fibroblasts. Overall design: RNA-Seq of 3 replicates each of iNSC, WT-NSC, and HNF
Conversion of Human Fibroblasts to Stably Self-Renewing Neural Stem Cells with a Single Zinc-Finger Transcription Factor.
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View SamplesKRAS mutations are the ost abundand driver mutations found in lung adenocarcinoma patients. Unfortunately, there are no clinical approved inhibitors available, to directly target mutant forms of KRAS. The aim of the study was to unravel the impact of upstream Egfr activation in signaling of mutated K-ras. We found that upregulation of G12D mutant Kras induced genes was significantly impaired when Egfr was knocked out. Our data suggests that signaling of mutant Kras depends on upstream activation. This finding may be exploited therapeutically by targeting EGFR in KRAS mutant patients. Overall design: We isolated mouse alveolar type II cells and induced the Kras G12D mutation, with and without concomitant Egfr knockout, in vitro. Cells lysates were analyzed 5 days following transgene induction.
JAK-STAT inhibition impairs K-RAS-driven lung adenocarcinoma progression.
Specimen part, Cell line, Subject
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