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Updated: Aug 23, 2026
Development of Compendium for Esophageal Squamous Cell Carcinoma
Published on: April 12, 2024
Effect of ionizing irradiation on human esophageal cancer cell lines by cDNA microarray gene expression analysis
Hideki Bo1, Mohammad Ghazizadeh, Hajime Shimizu
1Department of Molecular Pathology, Institute of Gerontology, Nippon Medical School.
Abstract:
To provide new insights into the molecular mechanisms underlying the effect of irradiation on esophageal squamous cell carcinomas (ESCCs), we used a cDNA microarray screening of more than 4,000 genes with known functions to identify genes involved in the early response to ionizing irradiation. Two human ESCC cell lines, one each of well (TE-1) and poorly (TE-2) differentiated phenotypes were screened. Subconfluent cells of each phenotype were treated with single doses of 2.0 Gy or 8.0 Gy irradiations. After a 15 min incubation time-point, the cells were collected and analyzed. Compared with non-irradiated cells, many genes revealed at least 2-fold upregulation or downregulation at both doses in well or poorly differentiated ESCC cells. The common upregulated genes in well and poorly differentiated cell types at both irradiation doses included SCYA5, CYP51, SMARCD2, COX6C, MAPK8, FOS, UBE2M, RPL6, PDGFRL, TRAF2, TNFAIP6, ITGB4, GSTM3, and SP3 and common downregulated genes involved NFIL3, SMARCA2, CAPZA1, MetAP2, CITED2, DAP3, MGAT2, ATRX, CIAO1, and STAT6. Several of these genes were novel and not previously known to be associated with irradiation. Functional annotations of the modulated genes suggested that at the molecular level, irradiation appears to induce a regularizing balance in ESCC cell function. The genes modulated in the early response to irradiation may be useful in our understanding of the molecular basis of radiotherapy and in developing strategies to augment its effect or establish novel less hazardous alternative adjuvant therapies.
Insights
Ionizing irradiation impacts esophageal squamous cell carcinoma (ESCC) by altering gene expression. This study identified key upregulated and downregulated genes in ESCC cells following irradiation, offering insights into radiotherapy mechanisms.
Area of Science:
- Oncology
- Molecular Biology
- Radiation Science
Background:
- Esophageal squamous cell carcinoma (ESCC) is a significant global health concern.
- Understanding the molecular effects of radiotherapy is crucial for improving treatment outcomes.
- Previous research has not fully elucidated the early molecular response of ESCC to ionizing irradiation.
Purpose of the Study:
- To identify genes involved in the early response of ESCC to ionizing irradiation.
- To gain new insights into the molecular mechanisms underlying irradiation's effect on ESCC.
- To explore potential therapeutic targets or strategies for enhancing radiotherapy efficacy.
Main Methods:
- Utilized cDNA microarray screening of over 4,000 genes.
- Examined two human ESCC cell lines (well and poorly differentiated).
- Treated cells with single doses of 2.0 Gy or 8.0 Gy irradiation and analyzed gene expression after 15 minutes.
Main Results:
- Identified numerous genes with at least 2-fold upregulation or downregulation in response to irradiation.
- Commonly upregulated genes included SCYA5, MAPK8, FOS, and TRAF2.
- Commonly downregulated genes included NFIL3, ATRX, and STAT6, with several novel genes identified.
Conclusions:
- Irradiation appears to induce a regularizing balance in ESCC cell function at the molecular level.
- The identified modulated genes offer potential biomarkers for radiotherapy response.
- These findings may aid in developing strategies to augment radiotherapy or alternative adjuvant therapies.
