A-kinase anchoring protein 3 messenger RNA expression correlates with poor prognosis in epithelial ovarian cancer

Sameer Sharma, Feng Qian, Bernadette Keitz, Deborah Driscoll, Mathew J. Scanlan, Jonathan Skipper, Kerry Rodabaugh, Shashikant Lele, Lloyd J. Old, Kunle Odunsi

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22 Scopus citations

Abstract

Objectives. Cancer-testis (CT) antigens are expressed in tumors but not normal tissues except the testis and could be targets for vaccine therapy in epithelial ovarian cancer (EOC). A-kinase anchoring protein 3 (AKAP-3) is a novel member of the CT antigen family. The aim of this study was to examine the expression of AKAP-3 in EOC and correlate with clinico-pathologic characteristics. Methods. One step RT-PCR was performed with RNA from normal and ovarian cancer cell lines and 74 epithelial ovarian tumor tissues. AKAP-3-specific PCR product was amplified. The distribution of AKAP-3 expression and clinico-pathologic variables was analyzed. Survival distributions were estimated, and multivariate analyses were performed. Results. AKAP-3 mRNA expression was demonstrated in 43/74 (58%) of the ovarian cancer specimens. AKAP-3 was expressed in normal testis, but not in other normal tissues. AKAP-3 expression significantly correlated with increased likelihood of residual tumor (P = 0.005), but no increase in the likelihood of recurrence or persistent disease (P = 0.06). Patients with AKAP-3 mRNA expression were found to have a significantly poorer overall survival (median 50 months) compared with patients without AKAP-3 expression (median not reached) (P = 0.007). Multivariate analysis of AKAP-3 expression, residual disease, and response to frontline chemotherapy found response to be the strongest predictor of overall survival (P = 0.012). Conclusions. Our data demonstrate that AKAP-3 is expressed at high frequency in patients with EOC. Since AKAP-3 demonstrates tumor-restricted expression and appears to be associated with worse overall survival, it could represent an attractive target for antigen-specific immunotherapy in EOC.

Original languageEnglish (US)
Pages (from-to)183-188
Number of pages6
JournalGynecologic Oncology
Volume99
Issue number1
DOIs
StatePublished - Oct 1 2005

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Keywords

  • AKAP-3
  • Cancer-testis antigen
  • Immunotherapy
  • Ovarian cancer
  • Prognosis

ASJC Scopus subject areas

  • Oncology
  • Obstetrics and Gynecology

Cite this

Sharma, S., Qian, F., Keitz, B., Driscoll, D., Scanlan, M. J., Skipper, J., Rodabaugh, K., Lele, S., Old, L. J., & Odunsi, K. (2005). A-kinase anchoring protein 3 messenger RNA expression correlates with poor prognosis in epithelial ovarian cancer. Gynecologic Oncology, 99(1), 183-188. https://doi.org/10.1016/j.ygyno.2005.06.006