Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/3067
Título: Differential expression of CDC25 phosphatases splice variants in human breast cancer cells
Autor: Albert, Hélène
Santos, Susana
Battaglia, Eric
Brito, Miguel
Monteiro, Carolino
Bagrel, Denyse
Palavras-chave: Alternative splicing
Breast neoplasms
Cell line, Tumor
Gene expression regulation
Protein isoforms
RNA splicing
Reverse transcriptase polymerase chain reaction
cdc25 Phosphatases
Data: Out-2011
Editora: De Gruyter
Citação: Albert H, Santos S, Battaglia E, Brito M, Monteiro C, Bagrel D. Differential expression of CDC25 phosphatases splice variants in human breast cancer cells. Clin Chem Lab Med. 2011;49(10):1707-14.
Resumo: 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.
Peer review: yes
URI: http://hdl.handle.net/10400.21/3067
ISSN: 1434-6621
Versão do Editor: http://www.degruyter.com/view/j/cclm.2011.49.issue-10/cclm.2011.635/cclm.2011.635.xml;jsessionid=F8CB5BE961C152A55085F87F901EE002
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