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1 "Seok Won Park"
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Original Article
A Histone Deacetylase Inhibitor, Trichostatin A, Enhances Radiosensitivity by Abrogating G2/M Arrest in Human Carcinoma Cells
In Ah Kim, Jin Ho Kim, Jin Hee Shin, Il Han Kim, Jae Sung Kim, Hong-Gyun Wu, Eui Kyu Chie, Yong Ho Kim, Bo-Kyung Kim, Semie Hong, Seok Won Park, Sung Whan Ha, Charn Il Park
Cancer Res Treat. 2005;37(2):122-128.   Published online April 30, 2005
DOI: https://doi.org/10.4143/crt.2005.37.2.122
AbstractAbstract PDFPubReaderePub
Purpose

Histone deacetylase inhibitors (HDIs) are emerging as potentially useful components in anticancer therapy. In this study, we tried to confirm the radiosensitizing effect of trichostatin A (TSA) on a panel of human carcinoma cell lines and elucidate its mechanism of interaction.

Materials and Methods

A549, HeLa and Caski cells were exposed to TSA for 18 hr prior to irradiation, and the cell survival then measured using a clonogenic assay. Western blot and flow cytometric analyses, for histone acetylation, and cell cycle and apoptosis, respectively, were also performed.

Results

TSA increased the acetylation of histone H3. The pretreatment of TSA consistently radiosensitized all three cell lines. The SF2 (surviving fraction at 2 Gy) of TSA-treated cells was significantly lower than that of mock treated cells. The SER (sensitizer enhancement ratio) increased in all 3 cell lines, in concentration dependent manners. The TSA treated cells showed abrogation of radiation-induced G2/M arrest, in a concentration dependent manner.

Conclusion

The pretreatment of TSA enhanced the radiosensitivity of a panel of human carcinoma cells, which was attributed, in part, to the abrogation of radiation-induced G2/M arrest.

Citations

Citations to this article as recorded by  
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  • Histone Deacetylase Inhibitor–Mediated Radiosensitization of Human Cancer Cells: Class Differences and the Potential Influence of p53
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