Study of Niraparib and TSR-042 in Recurrent Endometrial Cancer

Official Title

A Phase II, Open Label Study of the Poly(ADP-ribose) Polymerase Inhibitor Niraparib in Monotherapy or in Combination With Anti-PD1 Inhibitor TSR-042 in Recurrent Endometrial Cancer


This is a phase 2 study of investigational drug niraparib and TSR-042 in patients with advanced/recurrent endometrial cancer. The purpose of this study is to determine whether blocking a protein called poly (ADP-ribose) polymerase (PARP) with niraparib provides clinical benefit in patients with recurrent endometrial cancer, as well as to explore the possible impact of phosphatase and tensin homolog (PTEN) loss (loss of function of the PTEN gene) on blocking PARP with niraparib.

Trial Description

Primary Outcome:

  • Clinical benefit rate
Secondary Outcome:
  • Number of side effects
  • Overall response rate
  • Duration of response
  • Progression free survival rate
  • Overall survival rate
The purpose of this trial is to elucidate whether the PARP inhibition approach with niraparib, or the combination of niraparib and TSR-042, provides clinical benefit in patients with recurrent endometrial cancer. The trial is designed as a multicentre, open-label, phase II study of niraparib in monotherapy or in combination with anti-PD1 inhibitor TSR-042 in recurrent endometrial cancer. Patients must have received prior platinum based chemotherapy. The study will initially enroll patients with recurrent endometrial cancer to the niraparib monotherapy cohort not selected according to the PTEN status (cohort I). Once the initial assessment with niraparib monotherapy is completed (inclusion of 22 evaluable patients),Additional 22 patients will be enrolled in the combination arm with niraparib and TSR-042 (cohort II). Eligible participants will take niraparib capsules or tablets by mouth 300/200 mg, once a day, every day of every 21 day cycle.Participant will receive TSR-042 500 mg( intravenously) on the first day of each cycle for cycle 1 to 4. Followed by 1000 mg every 2 cycle for every 6 weeks for maximum of 2 yrs. While receiving the study treatment, participants will be asked to visit the study site on Days 1, 8, 15 of Cycle 1.Cycle 2 onward Days 1 and 15 and future cycles for safety tests and procedures. If, at any time, participants develop (or is suspected to have developed) MDS/AML, a mandatory bone marrow aspirate/biopsy will be done for testing to confirm diagnosis. When participants are taken off the study treatment permanently, they will be asked to return to the study site for an End of Study Treatment visit to have tests and procedures done for safety purposes. Participants who are taken off the study treatment for any reason other than disease progression will continue to have radiological assessments every 8 weeks until disease progression. Participants will continue to be followed up for side effects weekly in the first 4 weeks, then monthly until resolution.

View this trial on

Interested in this trial?

Print this page and take it to your doctor to discuss your eligibilty and treatment options. Only your doctor can refer you to a clinical trial.


Canadian Cancer Society

These resources are provided in partnership with the Canadian Cancer Society