Pembrolizumab + Chemotherapy/Radiotherapy for Endometrial Cancer

Recruiting in Palo Alto (17 mi)

+237 other locations

Age: 18+

Sex: Female

Travel: May Be Covered

Time Reimbursement: Varies

Trial Phase: Phase 3

Waitlist Available

Sponsor: Merck Sharp & Dohme Corp.

Stay on Your Current Meds

Pivotal Trial (Near Approval)

Prior Safety Data

Breakthrough Therapy

Approved in 3 Jurisdictions

Trial Summary

What is the purpose of this trial?The purpose of this study is to compare pembrolizumab + adjuvant chemotherapy with placebo + adjuvant chemotherapy, with or without radiotherapy, with respect to disease-free survival (DFS) as assessed radiographically by the investigator or by histopathologic confirmation of suspected disease recurrence, and with respect to overall survival (OS). The primary hypotheses are that pembrolizumab + adjuvant chemotherapy is superior to placebo + adjuvant chemotherapy, with or without radiotherapy, with respect to DFS as assessed radiographically by the investigator or by histopathologic confirmation of suspected disease recurrence, and with respect to OS.

Eligibility Criteria

This trial is for individuals with newly diagnosed endometrial cancer who've had surgery with curative intent and are at high risk of recurrence. They must be disease-free post-surgery, have not received prior radiation or systemic therapy, and have good performance status (ECOG 0 or 1). Participants need adequate organ function and cannot have certain conditions like active infections, known HIV/Hepatitis B/C infection, autoimmune diseases requiring recent treatment, or a history of severe reactions to the study drugs.

Inclusion Criteria

I am fully active or restricted in physically strenuous activity but can do light work.

I haven't had any treatments, including radiation or drugs, for my endometrial cancer.

I have provided a tissue sample from my current diagnosis for testing.

+4 more

Exclusion Criteria

Is currently participating in or has participated in a study of an investigational agent or has used an investigational device within 4 weeks before the first dose of study intervention

Has a known psychiatric or substance abuse disorder that would interfere with the participant's ability to cooperate with the requirements of the study

I have a type of uterine sarcoma, but not adenosarcoma.

+20 more

Participant Groups

The study tests pembrolizumab combined with adjuvant chemotherapy versus placebo plus chemotherapy in patients who may also receive radiotherapy. The goal is to see if pembrolizumab improves disease-free survival (DFS) and overall survival (OS) compared to the placebo when both are added to standard chemotherapy after surgery.

2Treatment groups

Experimental Treatment

Placebo Group

Group I: Pembrolizumab + ChemotherapyExperimental Treatment8 Interventions

Participants receive pembrolizumab 200 mg intravenously (IV) on Day 1 of each 3-week cycle (Q3W) for 6 cycles followed by pembrolizumab 400 mg IV on Day 1 of each 6-week cycle (Q6W) for an additional 6 cycles. During the Q3W dosing period of pembrolizumab, participants receive concurrent standard of care (SoC) chemotherapy for 4 or 6 cycles. Participants optionally receive radiotherapy starting within 6 weeks of completion of SoC chemotherapy. The SoC chemotherapy regimen includes carboplatin AUC 5 or 6 IV Q3W plus paclitaxel 175 mg/m\^2 IV Q3W. In the event of severe hypersensitivity to, or an AE requiring discontinuation of, carboplatin or paclitaxel, cisplatin or docetaxel may be substituted after investigator consults with sponsor. The SoC radiotherapy regimen may include, at the discretion of the investigator, external beam radiotherapy (EBRT) ≥4500 cGY with variable dose frequency, with or without cisplatin 50 mg/m\^2 IV on days 1 and 29 of EBRT, and/or brachytherapy radiation.

Group II: Placebo + ChemotherapyPlacebo Group8 Interventions

Participants receive placebo to pembrolizumab intravenously (IV) on Day 1 of each 3-week cycle (Q3W) for 6 cycles followed by placebo IV on Day 1 of each 6-week cycle (Q6W) for an additional 6 cycles. During the Q3W dosing period of placebo, participants receive concurrent standard of care (SoC) chemotherapy for 4 or 6 cycles. Participants optionally receive radiotherapy starting within 6 weeks of completion of SoC chemotherapy. The SoC chemotherapy regimen includes carboplatin AUC 5 or 6 IV Q3W plus paclitaxel 175 mg/m\^2 IV Q3W. In the event of severe hypersensitivity to, or an AE requiring discontinuation of, carboplatin or paclitaxel, cisplatin or docetaxel may be substituted after investigator consults with sponsor. The SoC radiotherapy regimen may include, at the discretion of the investigator, external beam radiotherapy (EBRT) ≥4500 cGY with variable dose frequency, with or without cisplatin 50 mg/m\^2 IV on days 1 and 29 of EBRT, and/or brachytherapy radiation.

Pembrolizumab is already approved in United States, European Union, United Kingdom for the following indications:

🇺🇸 Approved in United States as KEYTRUDA for: