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Genotoxic stress modulates CDC25C phosphatase alternative splicing in human breast cancer cell lines.

Abstract：

:CDC25 (cell division cycle 25) phosphatases are essential for cell cycle control under normal conditions and in response to DNA damage. They are represented by three isoforms, CDC25A, B and C, each of them being submitted to an alternative splicing mechanism. Alternative splicing of many genes is affected in response to genotoxic stress, but the impact of such a stress on CDC25 splicing has never been investigated. In this study, we demonstrate that genotoxic agents (doxorubicin, camptothecin, etoposide and cisplatin), alter the balance between CDC25C splice variants in human breast cancer cell lines both at the mRNA and protein levels. This modulation occurs during the response to moderate, sub-lethal DNA damage. Our results also suggest that the CDC25C splice variants expression shift induced by a genotoxic stress is dependent on the ATM/ATR signaling but not on p53. This study highlights the modulation of CDC25C alternative splicing as an additional regulatory event involved in cellular response to DNA damage in breast cancer cells.

journal_name

Mol Oncol

journal_title

Molecular oncology

authors

Albert H,Battaglia E,Monteiro C,Bagrel D

doi

10.1016/j.molonc.2012.06.003

subject

Has Abstract

pub_date

2012-10-01 00:00:00

pages

542-52

issue

5

eissn

1574-7891

issn

1878-0261

pii

S1574-7891(12)00067-1

journal_volume

6

pub_type

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