Trial Comparing Niraparib-bevacizumab-Dostarlimab and Niraparib-bevacizumab to Standard of Care in Recurrent Ovarian Cancer

Who cannot join

• Ovarian sarcomas, small cell carcinoma with neuroendocrine differentiation, non-epithelial cancers and cancer types not mentioned in the inclusion criteria 2. Concurrent cancer therapy 3. Concurrent treatment with an investigational agent or participation in another clinical trial 4. Major injuries or surgery within the past 21 days prior to start of study treatment with incomplete wound healing and/or planned surgery during the on-treatment study period 5. Previous malignant disease: patients are not eligible for the study if diagnosis, detection or treatment of invasive cancer (other than ovarian cancer; with the exception of basal or squamous cell carcinoma of the skin that was definitively treated) was detected within 2 years prior to randomization 6. Active infections or other serious underlying significant medical illness, abnormal laboratory finding or psychiatric illness/social situation that would, in the Investigator's judgment, makes the patient inappropriate for this study 7. Gastrointestinal disorders or abnormalities that would interfere with absorption of the study drug 8. History of bowel obstruction, including sub-occlusive disease, related to the underlying disease and history of abdominal fistula, gastrointestinal perforation or intra-abdominal abscess. Evidence of recto-sigmoid involvement by pelvic examination or bowel involvement on CT scan or clinical symptoms of bowel obstruction 9. Known contraindications to PARP inhibitors, VEGF directed therapy or immune checkpoint inhibitors 10. Known uncontrolled hypersensitivity to the investigational drugs 11. History of major thromboembolic event defined as:
• Uncontrolled pulmonary embolism (PE)
• Deep venous thrombosis (DVT)
• Other related conditions, though patients with stable therapeutic anticoagulation for more than three months prior randomization are eligible for this study. This also apply to PE \& DVT.
• 12. History of a cerebral vascular accident, transient ischemic attack or subarachnoid hemorrhage within the past 3 months 13. History of clinically significant hemorrhage in the past 3 months 14. Uncontrolled and/or symptomatic CNS metastasis or leptomeningeal carcinomatosis (Dexamethasone/prednisone therapy will be allowed if administered as stable dose for at least one month prior randomization) 15. Significant cardiovascular diseases, including uncontrolled hypertension, clinically relevant cardiac arrhythmia, unstable angina or myocardial infarction within 6 months prior to randomization, congestive heart failure > NYHA III, severe peripheral vascular disease, QT prolongation >470 msec ,clinically significant pericardial effusion 16. Pregnancy or breastfeeding. Patients with preserved reproductive capacity, unwilling to use a medically acceptable method of contraception for the duration of the trial and for 3 months afterwards.
• 17. Radiographic evidence of cavitation or necrotic tumors with invasion of adjacent major blood vessels 18. Active or chronic hepatitis C and/or B infection 19. Persistence of clinically relevant therapy related toxicity from previous chemotherapy 20. Proteinuria as demonstrated by: (a) urine protein: creatinine (UPC) ratio >/= 1.0 at screening OR (b) urine dipstick for proteinuria >/=2+ (patients discovered to have >/=2+ proteinuria on dipstick urinalysis at baseline should undergo a 24 hr urine collection and must demonstrate </=1g of protein in24 hours to be eligible 21. Patients must not have any known history of MDS 22. Patients must not have known persistent (> 4 weeks) ≥ Grade 2 hematological toxicity from prior cancer therapy 23. Patients must not have known ≥ Grade 3 thrombocytopenia or anemia with the last chemotherapy regimen.