SV40 large T antigen (TAg) contributes to cell transformation, in part, by targeting two well characterized tumor suppressors, pRb and p53. TAg expression affects the transcriptional circuits controlled by Rb and by p53. We have performed a microarray analysis to examine the global change in gene expression induced by wild-type TAg and TAg-mutants, in an effort to link changes in gene expression to specific transforming functions. For this analysis we have used enterocytes from the mouse small intestine expressing TAg. Expression of TAg in the mouse intestine results in hyperplasia and dysplasia. Our analysis indicates that practically all gene expression regulated by TAg in enterocytes is dependent upon its binding and inactivation of the Rb-family proteins.
Simian virus 40 T-antigen-mediated gene regulation in enterocytes is controlled primarily by the Rb-E2F pathway.
Sex, Age, Specimen part
View SamplesRb and E2F are thought to play antagonistic roles in celll proliferation. However, this model is based mostly from in vitro cell culture systems. We used small intestines to test this model in vivo.
E2f1-3 switch from activators in progenitor cells to repressors in differentiating cells.
Age, Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Redeployment of Myc and E2f1-3 drives Rb-deficient cell cycles.
Specimen part
View SamplesTo characterized the changes in gene expression during the differentiation of TS cells. TS cells can be derived from two time point during embryogenesis, cell lines tested were from each of these time points.
Gata3 regulates trophoblast development downstream of Tead4 and in parallel to Cdx2.
No sample metadata fields
View SamplesTo identify whether Cdx2 or Gata3 can activate trophoblast specific gene expression when expressed in R1 ES cells. To assess the dependency of Gata3 activity on Cdx2, Gata3 was also expressed in Cdx2-null ES cells.
Gata3 regulates trophoblast development downstream of Tead4 and in parallel to Cdx2.
No sample metadata fields
View SamplesDomesticated animal populations often show profound reductions in predator avoidance and fear-related behavior compared to wild populations. These reductions are remarkably consistent and have been observed in a diverse array of taxa including fish, birds, and mammals. Experiments conducted in common environments indicate that these behavioral differences have a genetic basis. In this study, we quantified differences in fear-related behavior between wild and domesticated zebrafish strains and used microarray analysis to identify genes that may be associated with this variation.
Brain transcriptome variation among behaviorally distinct strains of zebrafish (Danio rerio).
Sex, Specimen part
View SamplesOvarian cancer is one of the most deadly cancers accounting for only 3% of diagnosed cancers, but is the fifth leading cause of cancer deaths among woman; however, the progression of ovarian cancer is poorly understood. To study and further understand the early events that lead to epithelial derived ovarian cancer, we previously developed a cell model of progressive ovarian cancer. Mouse ovarian surface epithelial (MOSE) cells have undergone spontaneous transformation in cell culture and represent pre-neoplastic, non-tumorigenic to an aggressive malignant phenotype.
Changes in gene expression and cellular architecture in an ovarian cancer progression model.
Specimen part
View SamplesMammary alveologenesis is abrogated in the absence of the transcription factors STAT5A/5B that mediate cytokine signaling. To reveal the underlying causes for this developmental block we studied mammary stem and progenitor cells. While loss of STAT5A/5B did not affect the stem cell population and their ability to form mammary ducts, luminal progenitors were greatly reduced and unable to form alveoli during pregnancy. Temporally-controlled expression of transgenic STAT5A in mammary epithelium lacking STAT5A/5B restored the luminal progenitor population and rescued alveologenesis in a reversible fashion in vivo. Taken together, STAT5A is necessary and sufficient for the establishment of luminal progenitor cells.
Development of mammary luminal progenitor cells is controlled by the transcription factor STAT5A.
Specimen part
View SamplesMndal, a new interferon-inducible family member, is highly polymorphic, suppresses cell growth and may modify plasmacytoma susceptibility.
Mndal, a new interferon-inducible family member, is highly polymorphic, suppresses cell growth, and may modify plasmacytoma susceptibility.
Specimen part, Time
View SamplesThe etiology of autoimmune hepatitis is poorly understood but likely involves Th1 cells producing IFN-. BALB/c background TGF-1-/- mice rapidly develop fulminant Th1-mediated autoimmune hepatitis. Our aims are to profile liver gene expression in TGF-1-/- mice, to identify gene expression pathways dependent on IFN- as possible targets for rational therapy, and to test potential targets directly in vivo in mice.
The role of Ifng in alterations in liver gene expression in a mouse model of fulminant autoimmune hepatitis.
No sample metadata fields
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