Gynecologic cancer remains a major health problem for women in this country with approximately 25,000 deaths annually attributed to this problme. The purpose of this project is to characterize the molecular genetics of this group of tumors and ultimately use that information for clinical application in rationally designing therapeutic and prevention trials. We have characterized endomentrial, cervical, and ovarian specimens which span the histiologic spectrum from benign to malignant for mutations in the ras, p53, cyclin dependent kinase inhibitors, FHIT and Rb genes and microsatellite instability. For endomentrial cancers, we have analyzed curettage specimens: activated ras genes are found in the atypical hyperplasias (14%) and endometrial carcinomas (5%); p53 mutations are found in approximately 15% of atypical hyperplasia and carcinomas. Abnormalities in p15, p16, and p18 are rare in endometrial cancers. The FHIT gene is abnormal in cervical cancers and their precursor lesions but appears normal in endometrial and ovarian cancers. These studies should help to identify the molecular genetic events which are important in the genesis of endometrial and carvical cancers and their use for their early detection. Evaluation of ovarian tumors revealed that activated ras genes are found in benign (10%) and """"""""LMP"""""""" tumors (30%) while ovarian carcinomas (5-10%) do not. In addition, mutations in the tumor suppressor genes p53 and Rb occur in ovarian carcinomas (48 and 14% respectively) but are not present in LMP tumors. This suggests that ovarian carcinoma and LMP are descrete biologic entities. In addition, abnormalities in p15, 16, 18, and microsatellite instability are extremely rare in both of these tumors. p27 expression in normal in benign and borderline tumors but decreases in malignant ovarain neoplasms. In addition, decreased expression correlates with stage of tumor. We have extended these results by examining 143 specimens of advanced ovarian cancer from a large prospective trial (GOG#111) for mutations in the p53 gene, expression of p27 and cyclin E and HER/2/neu. The results demonstarte that overexpression of cyclin E but not downregulation of p27 is a poor prognostic factor in advanced ovarian cancer. Future projects will examine the value of p53 mutations as a prognostic or an early detection marker in ovarian cancers by examining large numbers of early stage ovarian cancers, specimens from second look operations, and PAP smears from women with ovarian cancer. Finally, to identify potential new markers of ovarian cancer and genes important in its pathogenesis, malignant ovarian epithelium is being compared to its benign counterpart using differential display technology, representational display, and microarrays. As part of the Director's Challenge collaborative grant between this laboratory and MSK, 400 ovarian canecr specimens will be profiled utilizing cDNA microarrays and patterns will be correlated with clinical characteristics such as survival, histology , and stage.Genes which are differentially expressed will be isolated, cloned and characterized for their role in the development of ovarian cancer. We are presently planning a prospecitive phase III trial to validate thye prognostic value of these genes.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Intramural Research (Z01)
Project #
1Z01SC000181-16
Application #
7735347
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
16
Fiscal Year
2008
Total Cost
$576,752
Indirect Cost
Name
National Cancer Institute Division of Clinical Sciences
Department
Type
DUNS #
City
State
Country
United States
Zip Code
Wamunyokoli, Fred W; Bonome, Tomas; Lee, Ji-Young et al. (2006) Expression profiling of mucinous tumors of the ovary identifies genes of clinicopathologic importance. Clin Cancer Res 12:690-700
Birrer, Michael J (2006) Ovarian cancer: not a borderline issue! Cancer Biol Ther 5:786-7
Sunde, Jan S; Donninger, Howard; Wu, Kongming et al. (2006) Expression profiling identifies altered expression of genes that contribute to the inhibition of transforming growth factor-beta signaling in ovarian cancer. Cancer Res 66:8404-12
DiFeo, Analisa; Narla, Goutham; Hirshfeld, Jennifer et al. (2006) Roles of KLF6 and KLF6-SV1 in ovarian cancer progression and intraperitoneal dissemination. Clin Cancer Res 12:3730-9
Zorn, Kristin K; Bonome, Tomas; Gangi, Lisa et al. (2005) Gene expression profiles of serous, endometrioid, and clear cell subtypes of ovarian and endometrial cancer. Clin Cancer Res 11:6422-30
Bonome, Tomas; Lee, Ji-Young; Park, Dong-Choon et al. (2005) Expression profiling of serous low malignant potential, low-grade, and high-grade tumors of the ovary. Cancer Res 65:10602-12
Jazaeri, Amir A; Awtrey, Christopher S; Chandramouli, Gadisetti V R et al. (2005) Gene expression profiles associated with response to chemotherapy in epithelial ovarian cancers. Clin Cancer Res 11:6300-10