Stress signals induce transcriptionally inactive E2F-1 independently of p53 and Rb (original) (raw)

Oncogene volume 19, pages 2369–2376 (2000) Cite this article

Abstract

One of the common features of cellular response to stress is cell cycle arrest or apoptosis. E2F is one of the key factors which controls cell cycle progression. Overexpression of E2F-1 can also induce apoptosis. In order to understand the role of E2F-1 in cellular response to stress, we studied the E2F-1 response in various cell lines to different types of stress signals including UV irradiation, cisplatin, etoposide and hypoxia. We showed here that the expression level of E2F-1 can be up regulated by the treatment of DNA damage agents as well as hypoxia. The kinetics of E2F-1 increase was dependent on the types of inducer and was similar to that of p53. However, stress signals can induce E2F-1 expression independently of p53 and Rb. Furthermore, the induced E2F-1 was transcriptionally inactive. All these results suggested that E2F-1 may play a very important role in cellular response to stress and this novel role of E2F-1 is independent of its transactivation function.

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Acknowledgements

We would like to thank Lynn Fallis and Florence Chan for the technical help and this work was supported by the Ludwig Institue for Cancer Research.

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  1. Ludwig Institute for Cancer Research, Imperial College of Science, Technology and Medicine at St. Mary's Campus, Norfolk Place, London, W2 1PG
    Daniel J O'Connor & Xin Lu

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  1. Daniel J O'Connor
  2. Xin Lu

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O'Connor, D., Lu, X. Stress signals induce transcriptionally inactive E2F-1 independently of p53 and Rb.Oncogene 19, 2369–2376 (2000). https://doi.org/10.1038/sj.onc.1203540

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