Transcription profiling of Arabidopsis overexpressing DREB2Aca vs wild type plants
Ontology highlight
ABSTRACT: Constitutive active form of DREB2A, a transcriptional regulator involving to plant drought and high-salinity stress response, was overexpressed in Arabidopsis, and gene expression pattern was compared between transgenic plants and wild type plants.
Project description:Chromosomal translocations that fuse the Mixed Lineage Leukemia (MLL) gene with multiple partners typify acute leukemias of infancy as well as therapy-related leukemias. We utilized a conditional knock-in strategy to bypass the embryonic lethality caused by MLL-CBP expression and to assess the immediate effects of induced MLL-CBP expression on hematopoiesis. Within days of activating MLL-CBP, the fusion protein selectively expanded granulocyte/macrophage progenitors (GMP) and enhanced their self-renewal/proliferation. MLL-CBP altered the gene expression program of GMP, upregulating a subset of genes including Hox a9. Inhibition of Hox a9 expression by RNA interference (RNAi) demonstrated that MLL-CBP required Hox a9 for its enhanced cell expansion. Following exposure to sublethal g-irradiation or N-ethyl-N-nitrosourea (ENU), MLL-CBP mice developed myelomonocytic hyperplasia and progressed to fatal myeloproliferative disorders. These represented the spectrum of therapy-induced acute myelomonocytic leukemia (t-AMML)/chronic myelomonocytic leukemia (t-CMML)/myelodysplastic/myeloproliferative disorder (t-MD/MPD) similar to that seen in humans possessing the t(11;16). This model of MLL-CBP therapy-related myeloproliferative disease demonstrates the selectivity of this MLL-fusion for GMP cells and its ability to initiate leukemogenesis in conjunction with cooperating mutations.
Project description:Analysis of transcriptional response to UV irradiation in two related crenarchaea, Sulfolobus solfataricus and Sulfolobus acidocaldarius.
Project description:Exponentially growing Sulfolobus acidocaldarius were treated with NaAc to generate replication runout and arrest in G2 phase. The cells were then resuspended in fresh acetate-free media which generates a synchronous population. Samples for investigation of gene expression change were taken during the synchronised populations progress through the cell cycle.
Project description:Gene expression profiling in leaves of a free-growing aspen tree (Populus tremula) in Umea in northern Sweden during natural autumn senescence (from August 17 to September 21).
Project description:NADPH dependent phagocytic oxidase, by producing hydroxyradicals such as hydrogen peroxide, is essential for host defense against Salmonella infection. We used gene array analysis to identify Salmonella enterica serovar Typhimurium genes regulated by NADPH dependent phagocytic oxidase intracellularly in comparison to those expressed in vitro by hydrogen peroxide.
Project description:Epithelial cells are the first cell type Salmonella Typhimurium will encounter when infecting a host. Using DNA array techology we identified the Salmonella enterica Typhimurium genes regulated inside human epithelial cells and their variation through time.
Project description:Evaluation and comparison of biological responses of rats and gene expression responses of the kidney in rats exposed to different doses of Puromycin [CAS:53-79-2;CHEBI:17939]
Project description:Microarray technology was used to monitor the level of expression of 9,300 human genes at different time-points after infection of the type II alveolar A549 human cell line with HRSVs.