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Differential expression of CDC25 phosphatases splice variants in human breast cancer cells
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Hélène Albert
Published/Copyright:
June 21, 2011
Abstract
Background: CDC25 phosphatases control cell cycle progression by activating cyclin dependent kinases. The three CDC25 isoforms encoding genes are submitted to alternative splicing events which generate at least two variants for CDC25A and five for both CDC25B and CDC25C. An over-expression of CDC25 was reported in several types of cancer, including breast cancer, and is often associated with a poor prognosis. Nevertheless, most of the previous studies did not address the expression of CDC25 splice variants. Here, we evaluated CDC25 spliced transcripts expression in anti-cancerous drug-sensitive and resistant breast cancer cell lines in order to identify potential breast cancer biomarkers.
Methods:CDC25 splice variants mRNA levels were evaluated by semi-quantitative RT-PCR and by an original real-time RT-PCR assay.
Results:CDC25 spliced transcripts are differentially expres-sed in the breast cancer cell lines studied. An up-regulation of CDC25A2 variant and an increase of the CDC25C5/C1 ratio are associated to the multidrug-resistance in VCREMS and DOXOR breast cancer cells, compared to their sensitive counterpart cell line MCF-7. Additionally, CDC25B2 tran-script is exclusively over-expressed in VCREMS resistant cells and could therefore be involved in the development of certain type of drug resistance.
Conclusions:CDC25 splice variants could represent interesting potential breast cancer prognostic biomarkers.
Received: 2011-1-18
Accepted: 2011-4-12
Published Online: 2011-06-21
Published in Print: 2011-10-01
©2011 by Walter de Gruyter Berlin Boston
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Keywords for this article
alternative splicing;
breast cancer;
CDC25 phosphatases;
prognostic markers
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- Laboratory medicine: an essential partner in the care of cancer patients
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- Genetics and Molecular Diagnostics
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- Mapping point-of-care performance using locally-smoothed median and maximum absolute difference curves
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- Significant elevation of plasma pentraxin 3 in patients with pelvic inflammatory disease
- Combined effects of coffee consumption and serum γ-glutamyltransferase on serum C-reactive protein in middle-aged and elderly Japanese men and women
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