Title : The catalytic topoisomerase II inhibitor dexrazoxane induces DNA breaks, ATF3 and the DNA damage response in cancer cells.

Pub. Date : 2015 May

PMID : 25521189






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1 The catalytic topoisomerase II inhibitor dexrazoxane induces DNA breaks, ATF3 and the DNA damage response in cancer cells. Dexrazoxane activating transcription factor 3 Homo sapiens
2 EXPERIMENTAL APPROACH: We investigated the DNA damage response and the role of the activating transcription factor 3 (ATF3) accumulation in tumour cells exposed to dexrazoxane. Dexrazoxane activating transcription factor 3 Homo sapiens
3 EXPERIMENTAL APPROACH: We investigated the DNA damage response and the role of the activating transcription factor 3 (ATF3) accumulation in tumour cells exposed to dexrazoxane. Dexrazoxane activating transcription factor 3 Homo sapiens
4 ATF3 protein was induced by dexrazoxane in a concentration- and time-dependent manner, which was abolished in TOP2A-depleted cells and in cells pre-incubated with ATM inhibitor. Dexrazoxane activating transcription factor 3 Homo sapiens
5 Knockdown of ATF3 gene expression by siRNA triggered apoptosis in control cells and diminished the p53 protein level in both control and dexrazoxane -treated cells. Dexrazoxane activating transcription factor 3 Homo sapiens
6 ATF3 knockdown also delayed the repair of dexrazoxane -induced DNA double-strand breaks. Dexrazoxane activating transcription factor 3 Homo sapiens
7 The DNA damage-triggered ATF3 controlled p53 accumulation and generation of double-strand breaks and is proposed to serve as a switch between DNA damage and cell death following dexrazoxane treatment. Dexrazoxane activating transcription factor 3 Homo sapiens