Iron-deficiency repsonses in Arabidopsis are controlled by several bHLH transcription factors. FIT, for example has been shown to direct iron-uptake responses. However, the role of shoot and root expressed genes bHLH100 and bHLH101 has not be clarified. We used microarray to study what genes might be miss-regulated in the double mutant bhlh100/bhlh101 background
Arabidopsis bHLH100 and bHLH101 control iron homeostasis via a FIT-independent pathway.
Age, Specimen part, Treatment
View SamplesThis SuperSeries is composed of the SubSeries listed below.
PDGF Engages an E2F-USP1 Signaling Pathway to Support ID2-Mediated Survival of Proneural Glioma Cells.
Specimen part, Treatment
View SamplesWe wanted to understand at what level BTS acts, i.e. how upstream BTS acts and if BTS misregulation affets only a subset or multiple subsets of Fe regulated genes. We studied WT and bts-3 mutant roots.
BRUTUS and its paralogs, BTS LIKE1 and BTS LIKE2, encode important negative regulators of the iron deficiency response in Arabidopsis thaliana.
Specimen part
View SamplesMLL1 translocations encode fusion proteins retaining the N-terminus of MLL1, which interacts with the tumor suppressor, menin. This interaction is essential for leukemogenesis, thus is a promising drug target. However, wild-type MLL1 plays a critical role in sustaining hematopoietic stem cells (HSCs), therefore disruption of an essential MLL1 cofactor would be expected to obliterate normal hematopoiesis. Here we show that rather than working together as a complex, menin and MLL1 regulate distinct pathways during normal hematopoiesis, particularly in HSCs and B-cells. We demonstrate the lack of genetic interaction between menin and MLL1 in steady-state or regenerative hematopoiesis and in B-cell differentiation despite the fact that MLL1 is critical for these processes. In B-cells, menin- or MLL1-regulated genes can be classified into three categories: 1) a relatively small group of co-regulated genes including previously described targets Hoxa9 and Meis1 but also Mecom and Eya1, and much larger groups of 2) exclusively menin-regulated and 3) exclusively MLL1-regulated genes. Our results highlight the large degree of independence of these two proteins and demonstrate that menin is not a requisite cofactor for MLL1 during normal hematopoiesis. Furthermore, our data support the development of menin-MLL1 disrupting drugs as safe and selective leukemia targeting agents.
Distinct pathways regulated by menin and by MLL1 in hematopoietic stem cells and developing B cells.
Specimen part
View SamplesInformed by the genetic alterations observed in human GBM, we engineered a novel, lentiviral injection mediated, mouse model of proneural GBM.
A recombinant lentiviral PDGF-driven mouse model of proneural glioblastoma.
Specimen part
View SamplesEffect of the cytokinin BA on wt and arr1,10,12 mutant seedlings
Type B response regulators of Arabidopsis play key roles in cytokinin signaling and plant development.
Age, Specimen part
View SamplesPMID: 15539473. We compared the gene expression in roots between WT and fit mutant under +Fe and -Fe conditions using ATH1 microarray analysis to explore which genes are affected by the loss of FIT function.
The essential basic helix-loop-helix protein FIT1 is required for the iron deficiency response.
Specimen part, Treatment
View SamplesWe compared the gene expression in roots between WT and uri mutant under +Fe and -Fe conditions using ATH1 microarray analysis to explore which genes are affected by the loss of URI function.
The iron deficiency response in <i>Arabidopsis thaliana</i> requires the phosphorylated transcription factor URI.
Specimen part
View SamplesIdentification of critical survival determinants of PDGF-driven proneural glioma. Results provided information about the genes and pathways that are regulated by PDGF signaling in PDGF-driven proneural glioma and led to the assessment of the importance of the USP1-ID2 axis in proneural glioma.
PDGF Engages an E2F-USP1 Signaling Pathway to Support ID2-Mediated Survival of Proneural Glioma Cells.
Specimen part, Treatment
View SamplesIdentification of critical survival determinants of PDGF-driven proneural glioma. Results provided information about the genes and pathways that are regulated by PDGF signaling in PDGF-driven proneural glioma and led to the assessment of the importance of the USP1-ID2 axis in proneural glioma.
PDGF Engages an E2F-USP1 Signaling Pathway to Support ID2-Mediated Survival of Proneural Glioma Cells.
Specimen part
View Samples