Atezolizumab Trial in Endometrial Cancer - AtTEnd

Sponsor
Mario Negri Institute for Pharmacological Research
Study ID
NCT03603184
Phase
PHASE3
Status
Completed

Conditions

Eligibility Criteria

Sex
FEMALE
Age
18 Years - N/A
Healthy Volunteers
Not accepted

Interventions

  • Atezolizumab — DRUG
    Atezolizumab will be administered as I.V. infusion at a fixed dose of 1200 mg, every 21 days until objective radiological disease progression as assessed by the investigator if they do not meet any other discontinuation criteria (patient refusal, toxicity).
  • Placebos — DRUG
    Placebo will be administered as I.V. infusion every 21 days until objective radiological disease progression as assessed by the investigator if they do not meet any other discontinuation criteria (patient refusal, toxicity).
  • Paclitaxel — DRUG
    Paclitaxel 175 mg/m2 will be administered every 21 days for 6-8 cycles or until progression of disease.
  • Carboplatin — DRUG
    Carboplatin AUC 5 or AUC 6 will be administered every 21 days for 6-8 cycles or until progression of disease.

Study Details

Atezolizumab is an engineered humanised monoclonal immunoglobulin G1 antibody that binds selectively to PD-L1 and prevents its interaction with PD-1 and B7-1. In May 2016 atezolizumab was approved by the FDA for patients with locally advanced or metastatic urothelial carcinoma who have disease progression during or following any platinum-containing chemotherapy, or within 12 months of receiving chemotherapy before surgery (neoadjuvant) or after surgery (adjuvant); in October 2016 it was approved by the FDA for patients with metastatic non-small cell lung cancer (NSCLC) who have disease progression during or following platinum-containing chemotherapy, and have progressed on an appropriate FDA-approved targeted therapy if their tumor has EGFR or ALK gene abnormalities. Finally, in April 2017 atezolizumab was granted accelerated approval by FDA for the first-line treatment of patients with locally advanced or metastatic urothelial carcinoma who are not eligible for cisplatin chemotherapy. Combinations of atezolizumab with chemotherapeutic agents and/or targeted therapies were studied in different solid tumors such as melanoma, NSCLC, renal cell carcinoma and colorectal carcinoma. From these studies the AE profile of atezolizumab combinations were consistent with that of the individual agents. Finally, preliminary results of a Phase Ia study of Atezolizumab (NCT01375842) monotherapy in relapsed endometrial cancer were reported as abstract at ASCO 2017. Fifteen patients were evaluated for safety and efficacy with a minimum follow-up of 11.2 months. No G4-5 related AEs occurred. Regarding efficacy ORR was 13% \[2/15\] by RECIST. Atezolizumab seemed to have a favorable safety profile, with durable clinical benefit in some patients. Further studies with atezolizumab are warranted given its promising results in advanced endometrial cancer and the limited efficacy of current treatment options.

Key Dates

Start date
Oct 2, 2018
Status verified
May 2025
Primary completion
Jan 20, 2025
Completion
Jan 20, 2025

Study Design

Enrollment
549 participants (actual)
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT

Arms

  • Experimental: Experimental arm
    paclitaxel 175 mg/m2 + carboplatin AUC 5 or 6 will be administered every 21 days for 6-8 cycles or PD. Atezolizumab will be administered as I.V. infusion at a fixed dose of 1200 mg, every 21 days until objective radiological disease progression as assessed by the investigator if they do not meet any other discontinuation criteria (patient refusal, toxicity). Patients who are clinically stable at initial RECIST v 1.1 - defined progression - should continue on treatment until the next imaging assessment that should be ≥4 weeks and no longer than 8 weeks later.
  • Placebo Comparator: Control arm
    paclitaxel 175 mg/m2 + carboplatin AUC 5 or AUC 6 will be administered every 21 days for 6-8 cycles or PD. Placebo will be administered as I.V. infusion every 21 days until objective radiological disease progression as assessed by the investigator if they do not meet any other discontinuation criteria (patient refusal, toxicity). Patients who are clinically stable at initial RECIST v 1.1 - defined progression - should continue on treatment until the next imaging assessment that should be ≥4 weeks and no longer than 8 weeks later.

Primary Outcome Measure

PFS in the MSI [ Time Frame: Up to 18 months after the last patient enrolled ]

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