To identify cellular and genetic abnormalities involved in interstrand cross link repair-deficient bone marrow failure and its transformation to leukemia, we used an Ercc1 hypomorphic mouse model (Ercc1 -/d).
ICL-induced miR139-3p and miR199a-3p have opposite roles in hematopoietic cell expansion and leukemic transformation.
Age, Specimen part
View SamplesGenome wide mRNA and miRNA profiling was performed in SH-SY5Y cells stably overexpressing wild type or mutant MIR204 or MIR618. Mutants came from a large scale genetic screening of brain expressed miRNA genes in patients with schizophrenia or idiopathic generalized epilepsy and in control individuals. Based on enrichment of the variants with the schizophrenic or epileptic phenotype and based on impact prediction, two variants, one near MIR204 (rs7861254) and one in MIR618 (rs2682818) were selected for functional validation. Genome wide profiling of mRNA (micro-array) and mature miRNAs (small RNA sequencing, submitted to SRA) was performed in the created stable cells to assess the effect of the variants and to investigate the function of these miRNA genes.
Schizophrenia-Associated MIR204 Regulates Noncoding RNAs and Affects Neurotransmitter and Ion Channel Gene Sets.
Cell line
View SamplesTo understand the molecular control of development and regeneration in the mammalian cochlear sensory epithelia, we performed a comparative study of gene expression patterns between postnatal day-3 (P3) and adult stages using a microarrays approach.
Transcriptomic analysis of the developing and adult mouse cochlear sensory epithelia.
Specimen part
View SamplesUrocanic acid (UCA) is a major epidermal chromophore that undergoes trans to cis photoisomerisation following exposure to solar ultraviolet radiation (UVR). Although there is considerable evidence that cis-UCA suppresses cell-mediated immune response in mouse skin, the molecular events are not fully understood. In this study, we examined involvement of gene transcription in the immunomodulatory effects of cis-UCA on primary human keratinocytes.
cis-Urocanic acid initiates gene transcription in primary human keratinocytes.
Sex
View SamplesAnalysis of H292 cells infected with Mycoplasma hyorhinis. Mycoplasma infection reduces the cytotoxic effect of Nutlin3 on H292 cells. The results provide insight into molecular mechanisms underlying the response of H292 cells to Nutlin3.
Mycoplasma hyorhinis reduces sensitivity of human lung carcinoma cells to Nutlin-3 and promotes their malignant phenotype.
Specimen part, Cell line
View SamplesE14 TG2a cells grown with LIF were disaggregated and FACS sorted for cell surface 5T4 negativity versus E14 TG2a cells grown without LIF for 3 days and sorted for 5T4 positivity.
CXCR4 mediated chemotaxis is regulated by 5T4 oncofetal glycoprotein in mouse embryonic cells.
Specimen part
View SamplesThe aim of this work was to identify functional features that are specific of human Treg cells, through the identification of genes that are differentially expressed: 1/ in activated Treg clones versus activated Thelper clones; 2/ in Th clones activated in the presence versus the absence of TGFb; 3/ in suppressed Th clones, i.e. Th clones activated in the presence of Treg clones, versus controls.
Comparison of stable human Treg and Th clones by transcriptional profiling.
No sample metadata fields
View SamplesAfter zygote division, the resulting daughter cells progressively give rise to two very different tissue types. With the use of microarrays, global nuclear expression profiles were generated.
Cell type-specific transcriptome analysis in the early Arabidopsis thaliana embryo.
Specimen part
View SamplesLateral root initiation was used as a model system to study the mechanisms behind auxin-induced cell division. Genome-wide transcriptional changes were monitored during the early steps of lateral root initiation. Inclusion of the dominant auxin signaling mutant solitary root1 (slr1) identified genes involved in lateral root initiation that act downstream of the AUX/IAA signaling pathway. Interestingly, key components of the cell cycle machinery were strongly defective in slr1, suggesting a direct link between AUX/IAA signaling and core cell cycle regulation. However, induction of the cell cycle in the mutant background by overexpression of the D-type cyclin (CYCD3;1) was able to trigger complete rounds of cell division in the pericycle that did not result in lateral root formation. Therefore, lateral root initiation can only take place when cell cycle activation is accompanied by cell fate respecification of pericycle cells. The microarray data also yielded evidence for the existence of both negative and positive feedback mechanisms that regulate auxin homeostasis and signal transduction in the pericycle, thereby fine-tuning the process of lateral root initiation.
Cell cycle progression in the pericycle is not sufficient for SOLITARY ROOT/IAA14-mediated lateral root initiation in Arabidopsis thaliana.
No sample metadata fields
View SamplesAs plant cells are fixed within their tissue context, a precise control of cell division orientation is crucial to generate complex three-dimensional organs. The transcription factor complex formed by TARGET OF MONOPTEROS5 (TMO5) and LONESOME HIGHWAY (LHW) triggers a change in cell division orientation leading to radial expansion, at least in part by activating local cytokinin biosynthesis. However, it remains unclear how cytokinin controls these oriented cell divisions. Here, we analyzed the transcriptional responses upon simultaneous induction of both TMO5 and LHW in detail. Using inferred network analysis, we identify AT2G28510/DOF2.1 as a cytokinin-dependent downstream target gene of the TMO5/LHW heterodimer complex. We further show that DOF2.1 is specifically required and sufficient for vascular cell proliferation without inducing other cytokinin-dependent effects such as the inhibition of vascular differentiation. In summary, we have identified DOF2.1 as a TMO5/LHW target gene, specifically responsible for controlling vascular cell proliferation leading to radial expansion.
DOF2.1 Controls Cytokinin-Dependent Vascular Cell Proliferation Downstream of TMO5/LHW.
Specimen part, Treatment
View Samples