Project description:The nuclear receptor steroidogenic factor-1 (SF-1, NR5A1) is a key regulator of adrenal and gonadal biology. We aimed to identify a novel subset of SF-1 target genes in the adrenal by performing ChIP-on-chip in NCI-H295R human adrenocortical cells using promoter tiling arrays. Analysis of ChIP-on-chip experiments with CisGenome identified 738 SF-1-binding regions that met criteria of an MA score more than 3.5 mean ± S.D. and a false discovery rate of <5%. Subsequent analysis focused on those regions that were located between 10 kb upstream and 3 kb downstream of the TSS of known genes, in keeping with the design of the Human Promoter 1.0R arrays. Using this approach, binding regions were annotated to 445 gene loci. The supplementary bed file contains all 946 SF-1 binding sites identified by analysis with CisGenome using standard settings (MA>3.0)
Project description:SF-1, a transcription factor belonging to the nuclear receptor superfamily, has a pivotal role for adrenogonadal development in humans and mice. A constant feature of childhood adrenocortical tumors (ACT) is SF-1 amplification and overexpression. Using an inducible cellular system, here we show that SF-1 overexpression increases human adrenocortical cell proliferation through opposing effects on cell cycle and apoptosis. SF-1 overexpression also selectively modulates steroidogenesis, reducing cortisol and aldosterone secretion. We identified a novel pro-apoptotic factor for adrenocortical cells, NOV/CCN3, whose levels are significantly reduced by SF-1 overexpression in human adrenocortical cells and are also reduced in primary adrenal tumors. Moreover, Sf-1 overexpression triggers adrenocortical hyperplasia and tumor formation in mice. These tumors express gonadal markers and activated Stat3. Our studies reveal the critical role of SF-1 gene dosage for adrenocortical tumorigenesis and constitute a rationale for the development of drugs targeting SF-1 transcriptional activity for ACT therapy. Keywords: differential expression, transcription factor
Project description:We report the application of next-generation sequencing (NGS) to analysis the gene expression profile among three different cells:SF-MSCs, iPSCs and iPSC-MSCs. Our results shown that iPSC-MSCs were more similar to SF-MSCs than iPSCs.
Project description:SF-1 is a nuclear receptor transcription factor playing a key role in adrenogonadal development and in adrenocortical tumorigenesis when overexpressed. We studied gene expression profiles using Affymetrix microarrays in the H295R/TR SF-1 adrenocortical cancer cell line, where SF-1 expression can be increased in a doxycycline-dependent manner (Mol. Endocrinol. 21: 2968–2987, 2007)
Project description:SF-1 is a nuclear receptor transcription factor playing a key role in adrenogonadal development and in adrenocortical tumorigenesis when overexpressed. NRSF/REST is a transcriptional repressor that represses expression of neuronal genes in non-neural tissues. Some data suggest that SF-1 and NRSF/REST can functionally interact in adrenocortical cancer cells. We studied gene expression profiles using Affymetrix microarrays in the H295R/TR SF-1 adrenocortical cancer cell line. In this cell line, SF-1 expression can be increased in a doxycycline-dependent manner (Mol. Endocrinol. 21: 2968–2987, 2007). The effects of a control siRNA and sRNAs specific for SF-1 and for NRSF/REST (in basal or increased SF-1 expression conditions) on gene expression were measured.
Project description:The goal of this study was to identify chromatin regulatory sites by FAIRE-seq under conditions of basal and increased dosage of transcription factor SF-1 in the H295R human adrenocortical tumor cell line. 4 samples: input DNA in basal SF-1 expression conditions - FAIRE-seq in basal SF-1 expression conditions - input DNA in SF-1 overexpression conditions - FAIRE-seq in SF-1 overexpression conditions
