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Updated: Jul 17, 2026
Targeted RNA Sequencing Assay to Characterize Gene Expression and Genomic Alterations
Published on: August 4, 2016
Gene expression profiling of childhood adrenocortical tumors
Alina Nico West1, Geoffrey A Neale, Stanley Pounds
1Interdisciplinary Science Program, University of Tennessee Health Science Center, Department of Biostatistics, St. Jude Children's Research Hospital, Memphis 38105, USA.
Abstract:
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.
Insights
This study analyzed gene expression in pediatric adrenocortical tumors (ACT), revealing distinct patterns that differentiate tumors from normal tissue and between adenomas and carcinomas. These findings offer insights into ACT biology and potential diagnostic tools.
Area of Science:
- Oncology
- Genomics
- Pediatric Medicine
Background:
- Pediatric adrenocortical tumors (ACT) are rare, aggressive malignancies with poorly understood etiology and biology.
- Limited knowledge exists regarding the molecular mechanisms driving childhood ACT development.
Purpose of the Study:
- To investigate the gene expression profiles of pediatric adrenocortical tumors (ACT).
- To identify molecular differences between normal adrenal glands, adenomas, and carcinomas.
- To compare gene expression patterns in pediatric ACT with adult ACT.
Main Methods:
- Microarray analysis of gene expression in 24 pediatric ACTs and 7 normal adrenal glands.
- Validation of gene expression patterns using quantitative real-time PCR and Western blot analysis.
Main Results:
- Distinct gene expression profiles successfully differentiated normal adrenal cortex from ACT.
- Significant gene expression differences were observed between adrenocortical adenomas and carcinomas.
- Pediatric ACTs exhibited similar gene expression patterns to adult ACT.
Conclusions:
- This is the first microarray study of childhood ACT, providing foundational gene expression profiles.
- Identified profiles may aid in diagnosing and determining the prognosis of pediatric ACT.
- The study highlights potential signaling pathways involved in pediatric ACT pathogenesis.
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