Discrimination between serous low malignant potential and invasive epithelial ovarian tumors using molecular profiling.

Abstract:

:Tumors of low malignant potential (LMP) represent 20% of epithelial ovarian cancers (EOCs) and are associated with a better prognosis than the invasive tumors (TOV). Defining the relationship between LMPs and TOVs remains an important goal towards understanding the molecular pathways that contribute to prognosis, as well as providing molecular markers, for these EOCs. To this end, DNA microarray analyses were performed either in a primary culture or a tumor tissue model system and selected candidate genes showing a distinctive expression profile between LMPs and TOVs were identified using a class prediction approach based on three statistical methods of analysis. Both model systems appear relevant as candidate genes identified by either model allowed the proper reclassification of samples as either LMPs or TOVs. Selected candidate genes (CAS, CCNE1, LGALS8, ITGbeta3, ATP1B1, FLIP, KRT7 and KRT19) were validated by real-time quantitative PCR analysis and show differential expression between LMPs and TOVs. Immunohistochemistry analyses showed that the two tumor classes were distinguishable by their expression of CAS, TNFR1A, FLIP, CKS1 and CCNE1. These results define signature patterns for gene expression of LMPs and TOVs and identify gene candidates that warrant further study to deepen our understanding of the biology of EOC.

journal_name

Oncogene

journal_title

Oncogene

authors

Ouellet V,Provencher DM,Maugard CM,Le Page C,Ren F,Lussier C,Novak J,Ge B,Hudson TJ,Tonin PN,Mes-Masson AM

doi

10.1038/sj.onc.1208214

subject

Has Abstract

pub_date

2005-07-07 00:00:00

pages

4672-87

issue

29

eissn

0950-9232

issn

1476-5594

pii

1208214

journal_volume

24

pub_type

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