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Updated: Oct 9, 2026

Immunofluorescence Imaging of DNA Damage and Repair Foci in Human Colon Cancer Cells
Published on: June 9, 2020
c-IAP2 is induced by ionizing radiation through NF-kappaB binding sites
1Department of Molecular Oncology, Kyoto University Graduate School of Medicine, Yoshida-Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan.
Abstract:
Transcriptional promoters responsive to low doses of X-irradiation may be useful in developing a new strategy in gene therapy combined with conventional radiotherapy. The retrovirus-mediated gene trap screening identified c-IAP2 as one of genes possessing such promoters. The analysis of the cis-elements responsive to X-irradiation in c-IAP2 promoter revealed that the NF-kappaB binding sites were necessary and sufficient for the X-ray-responsiveness. We constructed the plasmid p4NFB-BAX, which had four tandem repeats of the NF-kappaB binding sites of c-IAP2 promoter (4NFB) and a suicide gene BAX under the control of 4NFB. The human tumor cells transfected with p4NFB-BAX significantly reduced the number of cells that survived 2 Gy irradiation.
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