A Non-interventional Registry Study of Fluzoparib in the Treatment of Ovarian Cancer

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.

Fzocus-2 study is a multicenter, randomized, double-blind, placebo-controlled phase III clinical study of fluzoparib in the maintenance treatment of platinum-sensitive recurrent ovarian cancer. The preliminary results were published on the American Society of Gynecological Oncology (SGO) in 2021. A total of 252 patients were included in the study and were treated with fluzoparib (n = 167) or placebo (n = 85). The median follow-up time was 8.5 months. The population-wide data assessed by bIRC showed that the median PFS data were not mature. According to the Kaplan Meier curve, fluzoparib could significantly prolong the PFS (12.9 months: 5.5 months) and reduce the risk of disease progression or death by 75%.

Fzocus-3 is a phase IB study of fluzoparib approved for marketing, which included platinum-sensitive recurrent ovarian cancer patients with germline BRCA mutation who had previously received ≥ 3-line treatment. The objective remission rate of single-drug treatment is as high as 69.9%, and the median progression-free survival time is 12.0 months. It is well comparable with similar drugs and has good safety.

Fluzoparib was approved for the treatment of germline BRCA-mutated (gBRCAm) platinum-sensitive relapsed ovarian cancer in December 2020 and maintenance treatment of platinum-sensitive recurrent ovarian cancer in June 2021. A number of studies on fluzoparib in the field of ovarian cancer are also underway. It is urgent to obtain the real-world data of fluzoparib 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 fluzoparib 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.