BRCA1/2 gene status and CD8+ tumor-infiltrating T cell count (CD8 + TILs count) were evaluated as biomarkers using archived tumor tissue samples. Treatment arms were arranged according to pathological diagnosis and biomarker detection results.~Arm1 (Pathological classification: Serous, Endometrioid, and Clear cell Ovarian cancer; Biomarkers: BRCA 1/2 mutant): Pamiparib 40mg PO. bid. plus Bevacizumab 7.5mg/kg IV. D1 (q3w.).~Arm2 (Pathological classification: Serous, Endometrioid, and Clear cell Ovarian cancer; Biomarkers: BRCA 1/2 wildtype and ≥3 CD8+ TILs count): Tislelizumab 200mg IV. D1 + Bevacizumab 7.5mg/kg IV. D1 + Nab-paclitaxel 125mg / m2 IV. D1, 8 (q3w).~Arm3 (Pathological classification: Serous, Endometrioid, and Clear cell Ovarian cancer; Biomarkers: BRCA 1/2 wildtype and <3 CD8+ TILs count): Bevacizumab 7.5mg/kg IV D1, 15 + Nab-paclitaxel 100mg / m2 IV D1, 8, 15 (Q4w).~Arm4 (Pathological classification: Mucinous Ovarian cancer, Ovarian carcinosarcoma; Biomarkers: ≥3 CD8+ TILs count): Tislelizumab 200mg IV D1 + Bevacizumab 7.5mg/kg IV D1 + Nab-paclitaxel 125mg / m2 IV D1, 8 (q3w).~Arm5 (Pathological classification: Mucinous Ovarian cancer, Ovarian carcinosarcoma; Biomarkers: <3 CD8+ TILs count: Bevacizumab 7.5mg/kg IV. D1, 15 + Nab-paclitaxel 100mg / m2 IV. D1, 8, 15 (Q4w).~Treatment would continue until disease progression, intolerable toxicity, death, withdrawal of consent, or sponsor termination of the study, whichever occurs first.
This study is an open-label, multicenter, umbrella study aimed to evaluate the combined, biomarker-driven, targeted treatment efficiency of Pamiparib, Bevacizumab, Tislelizumab, and Nab-paclitaxel in patients with platinum-resistant recurrent ovarian cancer (PROC).