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Study of miRNA expression in childhood adrenocortical tumors

ABSTRACT: We studied the miRNA expression profile of a series of childhood adrenocortical tumors (ACT) and age-matched normal adrenal samples

ORGANISM(S): Homo sapiens

PROVIDER: GSE19856 | GEO | 2010/04/01

SECONDARY ACCESSION(S): PRJNA122133

REPOSITORIES: GEO

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Study of miRNA expression in childhood adrenocortical tumors

Project description:We studied the miRNA expression profile of a series of childhood adrenocortical tumors (ACT) and age-matched normal adrenal samples 25 ACT - 5 normal

2010-04-01 | E-GEOD-19856 | biostudies-arrayexpress

Gene exrpression profiling of childhood adrenocortical tumors

Project description:Pediatric adrenocortical tumors (ACT) are rare and often fatal malignancies; little is known regarding their etiology and biology. To provide additional insight into the nature of ACT, we determined the gene expression profiles of 24 pediatric tumors (five adenomas, 18 carcinomas, and one undetermined) and seven normal adrenal glands. Distinct patterns of gene expression, validated by quantitative real-time PCR and Western blot analysis, were identified that distinguish normal adrenal cortex from tumor. Differences in gene expression were also identified between adrenocortical adenomas and carcinomas. In addition, pediatric adrenocortical carcinomas were found to share similar patterns of gene expression when compared with those published for adult ACT. This study represents the first microarray analysis of childhood ACT. Our findings lay the groundwork for establishing gene expression profiles that may aid in the diagnosis and prognosis of pediatric ACT, and in the identification of signaling pathways that contribute to this disease. We used microarrays to explore the expression profiles differentially expressed in childhood adrenocortical tumors and in normal adrenal gland tissues. Pediatric adrenocortical adenoma and carcinoma patients were enrolled on the International Pediatric Adrenocortical Tumor Registry (IPACTR) and Bank protocol. Tumor specimens were harvested during surgery and snap frozen in liquid nitrogen to preserve tissue integrity. Data have been compiled for eight males and 15 females between 0 and 16 years of age. Table 1 (West et al, Cancer Research 67:601-608, 2007) summarizes the primary clinical information for each subject (excluding sample Unk1 with ACT of undetermined histology), including stage of the disease, tumor class, sex, age, relapse-free survival, and overall survival.

2015-11-25 | E-GEOD-75415 | biostudies-arrayexpress

Gene exrpression profiling of childhood adrenocortical tumors

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SNP data from 12 childhood adrenocortical tumors from outside Brazil

Project description:SNP array data from 12 childhood adrenocortical tumors (ACT) were used to identify recurrent chromosome rearrangements and candidate driver genes. 12 childhood ACT were analyzed with Illumina Human610-Quad v1.0 BeadChips.

2012-04-01 | E-GEOD-35064 | biostudies-arrayexpress

SNP data from 12 childhood adrenocortical tumors from outside Brazil

Project description:SNP array data from 12 childhood adrenocortical tumors (ACT) were used to identify recurrent chromosome rearrangements and candidate driver genes.

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microRNA expression profile of pediatric adrenocortical tumors

Project description:Here, we used a microarray technique to provide miRNA expression data of a set of 37 adrenocortical tumors (ACT) and 9 non-neoplastic adrenal controls from Brazilian patients assisted in two treatment centers in the state of São Paulo (HC-FMRP-USP and Centro Infantil Boldrini of Campinas).

2022-01-12 | GSE169253 | GEO

SNP data from 13 childhood adrenocortical tumours from Brazilian patients and 6 matched normal samples

Project description:SNP array data from 13 Brazilian childhood adrenocortical tumors (ACTs) were analyzed to detect recurrent copy number changes and highlight potential candidate driver genes. 13 childhood ACT were analyzed with Illumina HumanCNV370-Duo v1.0 chips. Paired normal blood samples from 6 patients were analyzed with Illumina HumanCNV370-Quad v3.0 chips.

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Identification of genes regulated by overexpressed SF-1 in human adrenocortical cells

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

2007-01-01 | GSE5911 | GEO

Transcription profiling by array of human adrenocortical tumors to identify molecular predictors of diagnosis and prognosis

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Project description:We performed miRNA expression profiling in a series of adrenocortical carcinomas, adrenocortical adenomas and normal adreno cortex using a microarray approach. Significant differentially expressed miRNAs among groups were identified using SAM analysis.

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