Raltitrexed increases radiation sensitivity of esophageal squamous carcinoma cells

Cancer Cell International
Wen-Xiu DingXinchen Sun

Abstract

Radiation therapy remains an important therapeutic modality, especially for those patients who are not candidates for radical resection. Many strategies have been developed to increase the radiosensitivity of esophageal cancer, with some success. This study was conducted to determine whether raltitrexed can enhance radiosensitivity of esophageal squamous cell carcinoma (ESCC). ESCC cell lines 24 h were incubated with raltitrexed or DMSO with or without subsequent irradiation. Cell Counting Kit assay-8 assay and clonogenic survival assay were used to measure the cell proliferation and radiosensitization, respectively. Flow cytometry was utilized to examine cell apoptosis and cell cycle distribution in different groups. Immunofluorescence analysis was performed to detect deoxyribonucleic acid (DNA) double-strand breaks. In addition, the expression levels of proteins that are involved in radiation induced signal transduction including Bax, Cyclin B1, Cdc2/pCdc2, and Cdc25C/pCdc25C were examined by western blot analysis. The results indicated that raltitrexed enhanced radiosensitivity of ESCC cells with increased DNA double-strand breaks, the G2/M arrest, and the apoptosis of ESCC cells induced by radiation. The sensitization enhan...Continue Reading

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Citations

Jan 10, 2021·Cancer radiothérapie : journal de la Société française de radiothérapie oncologique·X XiaX Ge
Sep 9, 2019·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Qiaozhen KangJike Lu

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Methods Mentioned

BETA
X-ray
flow cytometry
electrophoresis
X
ray
xenograft

Software Mentioned

GraphPad Prism

Related Concepts

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis

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