A Prospective Observational Study of Senaparib in the Treatment of Epithelial Ovarian Cancer (RESO)

Ovarian cancer is one of the most serious malignant tumors that threaten women's health. The incidence rate is third place in the female reproductive system malignant tumors. The mortality rate ranks the first in gynecologic malignancies, and most of them are advanced at the time of diagnosis. The initial treatment of ovarian cancer is mainly surgery and adjuvant chemotherapy. Although most patients can obtain clinical remission after initial treatment, 70% of patients still relapse within 3 years. Therefore, finding effective drugs to prolong the chemotherapy-free interval and exploring comprehensive treatment schemes to prolong survival is the key to treatment.

In recent years, the advent of poly adenosine diphosphate ribose polymerase inhibitors has brought significant changes to the treatment of ovarian cancer. A series of high-level evidence-based medical evidence shows that the application of PARP inhibitors after complete and partial remission of initial treatment or platinum-sensitive recurrence treatment can significantly prolong the progression-free survival time of ovarian cancer patients, Maintenance therapy has become a new model for the treatment of ovarian cancer. At the same time, PARP inhibitors have been approved for posterior line treatment of ovarian cancer. At present, PARP inhibitors have been widely used in clinics and become an important cornerstone of the comprehensive treatment of ovarian cancer.

FLAMES study is a multicenter, randomized, double-blind, placebo-controlled phase III clinical study of senaparib in the maintenance treatment of advanced ovarian cancer. The preliminary results were published on the American Society of Gynecological Oncology (SGO) in 2023. A total of 404 patients were included in the study and were treated with senaparib (n =271 ) or placebo (n =133 ). The median follow-up time was 22.3months. The population-wide data assessed by BIRC showed that the median PFS data were not reached. According to the Kaplan Meier curve, senaparib could significantly prolong the PFS (NR vs 13.6 months) and reduce the risk of disease progression or death by 57%.

Senaparib was approved for the maintenance treatment of advanced ovarian cancer in January 2025 . A number of studies on senaparib in the field of ovarian cancer are also underway. It is urgent to obtain the real-world data of senaparib in the field of ovarian cancer in China. This study will collect information on the baseline characteristics, treatment, and management of ovarian cancer provided in the real world to illustrate the safety and effectiveness of senaparib in the treatment of ovarian cancer under the conditions of real clinical practice. It may also include various subgroups of patients with ovarian cancer, which are not involved in the existing phase III registered studies, In order to better understand and explore the use of PARP inhibitors in some patient subgroups and the treatment mode and effect of PARP inhibitors in the treatment of this disease.