Marth, C; Tarnawski, R; Tyulyandina, A; Pignata, S; Gilbert, L; Kaen, D; Rubio, MJ; ... Makker, V; + view all Marth, C; Tarnawski, R; Tyulyandina, A; Pignata, S; Gilbert, L; Kaen, D; Rubio, MJ; Frentzas, S; Beiner, M; Magallanes-Maciel, M; Farrelly, L; Choi, CH; Berger, R; Lee, C; Vulsteke, C; Hasegawa, K; Braicu, EI; Wu, X; McKenzie, J; Lee, JJ; Makker, V; - view fewer (2022) Phase 3, randomized, open-label study of pembrolizumab plus lenvatinib versus chemotherapy for first-line treatment of advanced or recurrent endometrial cancer: ENGOT-en9/LEAP-001. International journal of gynecological cancer: official journal of the International Gynecological Cancer Society , 32 (1) pp. 93-100. 10.1136/ijgc-2021-003017.

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Abstract

BACKGROUND: Pembrolizumab plus lenvatinib is a novel combination with promising efficacy in patients with advanced and recurrent endometrial cancer. This combination demonstrated high objective response rates in a single-arm phase 1b/2 trial of lenvatinib plus pembrolizumab in patients with advanced endometrial cancer (KEYNOTE-146/Study 111) after ≤2 previous lines of therapy. In a randomized phase 3 trial of lenvatinib in combination with pembrolizumab versus treatment of physician's choice in patients with advanced endometrial cancer (KEYNOTE-775/Study 309), after 1‒2 previous lines of therapy (including neoadjuvant/adjuvant), this combination improved objective response rates, progression-free survival, and overall survival compared with chemotherapy. PRIMARY OBJECTIVE: To compare the efficacy and safety of first-line pembrolizumab plus lenvatinib versus paclitaxel plus carboplatin in patients with newly diagnosed stage III/IV or recurrent endometrial cancer, with measurable or radiographically apparent disease. STUDY HYPOTHESIS: Pembrolizumab plus lenvatinib is superior to chemotherapy with respect to progression-free survival and overall survival in patients with mismatch repair-proficient tumors and all patients (all-comers). TRIAL DESIGN: Phase 3, randomized (1:1), open-label, active-controlled trial. Patients will receive pembrolizumab intravenously every 3 weeks plus lenvatinib orally daily or paclitaxel plus carboplatin intravenously every 3 weeks, stratified by mismatch repair status (proficient vs deficient). Patients with mismatch repair-proficient tumors will be further stratified by Eastern Cooperative Oncology Group performance status (0/1), measurable disease (yes/no), and prior chemotherapy and/or chemoradiation (yes/no). MAJOR INCLUSION/EXCLUSION CRITERIA: Adults with stage III/IV/recurrent histologically confirmed endometrial cancer that is measurable or radiographically apparent per blinded independent central review. Patients may have received previous chemotherapy only as neoadjuvant/adjuvant therapy and/or concurrently with radiation. Patients with carcinosarcoma (malignant mixed Müllerian tumor), endometrial leiomyosarcoma, or other high grade sarcomas, or endometrial stromal sarcomas were excluded. PRIMARY ENDPOINTS: Progression-free and overall survival (dual primary endpoints). SAMPLE SIZE: About 875 patients. ESTIMATED DATES FOR COMPLETING ACCRUAL AND PRESENTING RESULTS: Enrollment is expected to take approximately 24 months, with presentation of results in 2022. TRIAL REGISTRATION: ClinicalTrials.gov, NCT03884101.

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