The role of Specificity Protein 1 and downstream target Survivin in Ovarian Adenocarcinoma Survival and Prognosis

Date

2019-03-05

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Nash, Madeline
Lin, Christine
Chandra, Ashwin
Nair, Maya
Vishwantha, Jamboor
Basha, Riyaz

ORCID

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Purpose: Ovarian adenocarcinoma is a solid proliferation of ovarian glandular epithelium. These are the most threatening types of gynecologic malignancies. Although many risk factors are involved in determining prognosis, the study of germline mutations related to tumorigenesis is the focus of this study. It is well established that Specificity protein 1 (Sp1), a transcription factor regulates key genes associated with cancer including survivin (baculoviral inhibitor of apoptosis repeat-containing 5 or BIRC5). Survivin is an anti-apoptotic protein which is known to be associated with poor prognosis in multiple cancers and displays therapy-resistant tumor characteristics. Sp1 has also been associated with poor prognosis in several different types of cancers. The role of these two proteins in the development of ovarian adenocarcinoma and their impact on prognosis remains unclear. Methods: The R2 genomics visualization platform was used to generate Kaplan-Meier curves for survival probabilities in patients with ovarian adenocarcinoma who express high and low levels of Sp1 and Survivin. Both curves were generated using data from 107 patients. There were 38 patients in the high Sp1 expression group and 69 patients in the low Sp1 expression group. In the Survivin (BIRC5) group there were 70 patients with high expression and 37 patients in the low expression group. Results: The survival curves show that patients with ovarian adenocarcinoma who express higher levels of Sp1 had a significantly poorer prognosis compared to patients with lower levels of Sp1 expression (p = 0.023). Similarly, patients with high levels of survivin protein expression were found to have a significant decrease in overall survival probability compared to patients who had low levels of survivin expression (p = 0.049). Conclusion: There is a strong association with high expression of either Sp1 or survivin with poor prognosis in patients with ovarian adenocarcinoma. Moving forward, studies are in development to elucidate the roles that Sp1 and survivin play, individually and together, in the evolution of ovarian adenocarcinoma. We are also interested in exploring the relationship of differential expressivity of Sp1 and survivin in association with age, race and ethnicity among patients with ovarian cancer.

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