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Updated: Apr 22, 2026
Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
Published on: April 12, 2019
Pathway enrichment analysis of human osteosarcoma U-2 OS bone cells expose to dexamethasone
1Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China. junxia11aa@hotmail.com.
Objective:
Osteosarcoma is the second highest cause of cancer-related death in children, mainly due to development of often fatal metastasis, usually in the lungs. Glucocorticoids play an important role in the treatment of a number of inflammatory diseases and immune diseases. The objective of this study was to explore the molecular mechanism of osteosarcoma in response to dexamethasone (DEX, a kind of synthetic glucocorticoid), with a view to obtain information on the pathways activated by DEX.
Materials And Methods:
By using the GSE6711 Affymetrix microarray data accessible from Gene Expression Omnibus database, we first identified the differentially expressed genes (DEGs) among different time course treatment with dexamethasone of each isoform, and the DEGs among cells expressing different GR isoforms, followed by the pathway enrichment analysis of the DEGs.
Results:
The results indicated that DEX could inhibit osteosarcoma cell proliferation and promote osteosarcoma cell apoptosis through induction of lots of related genes expression at the transcription level.
Conclusions:
Our data provide a comprehensive bioinformatics analysis of pathways which may be involved in the response to glucocorticoids.
Insights
Dexamethasone (DEX) inhibits osteosarcoma cell growth and promotes apoptosis by altering gene expression. This study identifies key molecular pathways involved in the response to glucocorticoids in osteosarcoma.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Osteosarcoma is a leading cause of pediatric cancer mortality, primarily due to metastasis.
- Glucocorticoids are vital in treating inflammatory and immune conditions.
Purpose of the Study:
- To investigate the molecular mechanisms by which dexamethasone (DEX) affects osteosarcoma.
- To identify pathways activated by DEX in osteosarcoma cells.
Main Methods:
- Utilized Gene Expression Omnibus (GEO) microarray data (GSE6711).
- Identified differentially expressed genes (DEGs) following DEX treatment and across different glucocorticoid receptor (GR) isoforms.
- Performed pathway enrichment analysis on identified DEGs.
Main Results:
- DEX treatment significantly impacted gene expression in osteosarcoma cells.
- DEX inhibited osteosarcoma cell proliferation and induced apoptosis.
- Observed induction of numerous related genes at the transcriptional level.
Conclusions:
- The study provides a comprehensive bioinformatics analysis of DEX-responsive pathways in osteosarcoma.
- Identified pathways may offer insights into glucocorticoid treatment strategies for osteosarcoma.
