title: Expression of EMSY gene in sporadic ovarian cancer.
abstract: The majority of familial breast and ovarian cancers arise from mutations in the BRCA1 and BRCA2 genes. Amplification at the 11q13.5 locus is commonly observed in breast and ovarian cancers. In 2003, Hughes-Davies et al. identified a novel gene (EMSY) at this locus which binds BRCA2 within a region deleted in some cancers. Although little is known about the cellular role of EMSY, indirect evidence suggests that this nuclear protein is capable of silencing the activation potential of BRCA2. In this study we aimed to investigate expression of the EMSY gene and its protein product in sporadic ovarian cancer. Real-time quantitative RT-PCR was performed in 50 ovarian cancer and 17 normal ovarian tissue samples. Overexpression of the EMSY gene was found in 6/50 cases (12%), but in none of the control samples. To determine the EMSY protein by Western blotting, semi-quantitative analysis of the EMSY protein was performed using the Scion Image Gel Analysis Program. Statistical analysis was performed using SPSS 11.5. All patients having EMSY overexpression also displayed increased levels of the EMSY protein. Sporadic ovarian cancer shows overexpression of EMSY at a prevalence similar to that found in breast cancer and the overexpression is correlated with the protein level.
authors.affiliation: Cerrahpasa Medical Faculty, Department of Medical Biology, Istanbul University, and Department of Gynecology and Obstetrics, Zeynep Kamil Maternity and Child Research and Training Hospital, Istanbul, Turkey.
authors.forename: Julide
authors.initials: J
authors.lastname: Altinisik
authors.forename: Ates
authors.initials: A
authors.lastname: Karateke
authors.forename: Hakan
authors.initials: H
authors.lastname: Coksuer
authors.forename: Turgut
authors.initials: T
authors.lastname: Ulutin
authors.forename: Nur
authors.initials: N
authors.lastname: Buyru
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000235:genetics* / Q000378:metabolism; D009687:Nuclear Proteins / Q000235:genetics* / Q000378:metabolism; D010051:Ovarian Neoplasms / Q000235:genetics* / Q000473:pathology; D012097:Repressor Proteins / Q000235:genetics* / Q000378:metabolism
chemical_list: C480344:EMSY protein, human; D009363:Neoplasm Proteins; D009687:Nuclear Proteins; D012097:Repressor Proteins