Objective This study examined the prognostic significance of copper-transporting P-type adenosine triphosphatase (ATP7B) expression in patients with ovarian carcinoma treated with platinum-taxane combination chemotherapy.
Methods Expression of ATP7B in ovarian carcinoma was assessed by immunohistochemistry and clinical data collected by retrospective review of medical charts.
Results Overexpression of ATP7B was identified in 25 (29.1%) of 86 ovarian carcinomas. The frequency of ATP7B expression in clear cell carcinomas was significantly higher than that in serous high-grade carcinomas (P < 0.05). We observed no statistically significant correlations between high ATP7B protein expression and either disease-free survival (P = 0.722) or overall survival (P = 0.389).
Conclusions Our study is the first to demonstrate a lack of statistically significant differences between ATP7B positive and negative cases with respect to prognosis of patients with ovarian carcinoma treated with a platinum-taxane combination regimen. However, that ATP7B expression in clear cell carcinomas was significantly higher than that in serous carcinomas may partially explain the difference in chemotherapeutic response and prognosis between patients with these 2 types of carcinomas.
- Ovarian carcinoma
- Clear cell carcinoma
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This study was supported by grants from the Ministry of Education, Culture, Sports, Science and Technology in Japan, Suzuken Memorial Foundation, and Takeda Science Foundation.
The authors declare no conflicts of interest.