Palbociclib plus letrozole in estrogen receptor-positive advanced/recurrent endometrial cancer: double-blind placebo-controlled randomized phase II ENGOT-EN3/PALEO trial

Purpose - The CDK4/6 inhibitor palbociclib inhibits cyclin A, which is overexpressed in endometrial cancer. Combining palbociclib with endocrine therapy improves efficacy in hormone receptor-positive breast cancer. We investigated palbociclib combined with endocrine therapy for estrogen receptor-pos...

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Hauptverfasser: Mirza, Mansoor R. (VerfasserIn) , Bjørge, Line (VerfasserIn) , Marmé, Frederik (VerfasserIn) , Christensen, René DePont (VerfasserIn) , Gil-Martin, Marta (VerfasserIn) , Auranen, Annika (VerfasserIn) , Ataseven, Beyhan (VerfasserIn) , Rubio, Maria Jesús (VerfasserIn) , Salutari, Vanda (VerfasserIn) , Luczak, Adam A. (VerfasserIn) , Runnebaum, Ingo B. (VerfasserIn) , Redondo, Andrés (VerfasserIn) , Lindemann, Kristina (VerfasserIn) , Trillsch, Fabian (VerfasserIn) , Ginesta, M. Pilar Barretina (VerfasserIn) , Roed, Henrik (VerfasserIn) , Kurtz, Jean-Emmanuel (VerfasserIn) , Petersson, Karen S. (VerfasserIn) , Nyvang, Gitte-Bettina (VerfasserIn) , Sehouli, Jalid (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: January 2025
In: Gynecologic oncology
Year: 2025, Jahrgang: 192, Pages: 128-136
ISSN:1095-6859
DOI:10.1016/j.ygyno.2024.12.003
Online-Zugang:Verlag, kostenfrei, Volltext: https://doi.org/10.1016/j.ygyno.2024.12.003
Verlag, kostenfrei, Volltext: https://www.sciencedirect.com/science/article/pii/S0090825824012204
Volltext
Verfasserangaben:Mansoor R. Mirza, Line Bjørge, Frederik Marmé, René DePont Christensen, Marta Gil-Martin, Annika Auranen, Beyhan Ataseven, Maria Jesús Rubio, Vanda Salutari, Adam A. Luczak, Ingo B. Runnebaum, Andrés Redondo, Kristina Lindemann, Fabian Trillsch, M. Pilar Barretina Ginesta, Henrik Roed, Jean-Emmanuel Kurtz, Karen S. Petersson, Gitte-Bettina Nyvang, Jalid Sehouli

MARC

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245 1 0 |a Palbociclib plus letrozole in estrogen receptor-positive advanced/recurrent endometrial cancer  |b double-blind placebo-controlled randomized phase II ENGOT-EN3/PALEO trial  |c Mansoor R. Mirza, Line Bjørge, Frederik Marmé, René DePont Christensen, Marta Gil-Martin, Annika Auranen, Beyhan Ataseven, Maria Jesús Rubio, Vanda Salutari, Adam A. Luczak, Ingo B. Runnebaum, Andrés Redondo, Kristina Lindemann, Fabian Trillsch, M. Pilar Barretina Ginesta, Henrik Roed, Jean-Emmanuel Kurtz, Karen S. Petersson, Gitte-Bettina Nyvang, Jalid Sehouli 
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520 |a Purpose - The CDK4/6 inhibitor palbociclib inhibits cyclin A, which is overexpressed in endometrial cancer. Combining palbociclib with endocrine therapy improves efficacy in hormone receptor-positive breast cancer. We investigated palbociclib combined with endocrine therapy for estrogen receptor-positive advanced/recurrent endometrial cancer. - Patients and methods - This placebo-controlled double-blind, randomized phase II screening trial (NCT02730429) enrolled women with measurable/evaluable estrogen receptor-positive endometrioid endometrial cancer that was primary metastatic or had relapsed after ≥1 prior systemic therapy. Patients were randomized in a 1:1 ratio, stratified by number of prior chemotherapy lines, measurable versus evaluable non-measurable disease, and prior medroxyprogesterone/megestrol acetate treatment, to receive oral letrozole 2.5 mg on days 1-28 plus either oral palbociclib 125 mg or placebo on days 1-21, repeated every 28 days until disease progression or unacceptable toxicity. The primary end point was investigator-assessed progression-free survival (PFS). - Results - Among 77 patients randomized between February 16, 2017, and December 21, 2018, 73 were treated (36 with palbociclib-letrozole, 37 with placebo-letrozole). Median follow-up was 21.9 (95 % CI, 16.7 to 22.3) months. Median PFS was 8.3 (95 % CI, 4.6 to 11.2) versus 3.1 (95 % CI, 2.7 to 6.8) months, respectively. In a landmark analysis at 12 months the PFS hazard ratio was 0.57 (95 % CI, 0.32 to 0.99; P = .044). Grade ≥ 3 adverse events were more common with palbociclib-letrozole (67 %) than placebo-letrozole (30 %), most commonly neutropenia (44 % v 0 %, respectively). - Conclusion - These results support a potential role of the palbociclib-letrozole combination as treatment for hormone receptor-positive advanced/recurrent endometrial cancer. Based on these encouraging results, phase III evaluation of letrozole combined with a CDK4/6 inhibitor is planned. - Clinical trial information - NCT02730429 
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