January, 2025
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Aleix Prat: Excited to share the results of the SOLTI-ELIPSE trial
Jan 19, 2025, 15:23

Aleix Prat: Excited to share the results of the SOLTI-ELIPSE trial

Aleix Prat, Director of the Cancer Institute at the Hospital Clinic of Barcelona, shared a post on LinkedIn:

“Excited to share the results of the SOLTI-ELIPSE trial, just published in AACR Journals Clinical Cancer Research!

Our study evaluated elacestrant, a selective estrogen receptor degrader (SERD), in the preoperative setting for estrogen receptor-positive (ER-positive), HER2-negative early breast cancer.

Key Findings:

  • Elacestrant achieved a Complete Cell Cycle Arrest (CCCA) rate of 27.3%, with a significant reduction in Ki67 (-52.9%).
  • The treatment induced a shift toward a more endocrine-sensitive and less proliferative tumor phenotype, as shown by PAM50-based gene signatures.
  • Elacestrant enhanced the expression of immune-response genes while suppressing proliferation and estrogen-signaling pathways.
  • Safety profile: Most adverse events were mild (grade 1), with only one grade 3 rash leading to treatment discontinuation.

Why this matters:

These results demonstrate the potential of elacestrant in early-stage breast cancer, showing both biological and molecular responses, and highlight its manageable safety profile. This paves the way for further investigation of elacestrant in the early setting.

A huge thank you to the 2 PIs (Maria Vidal and Meritxell Bellet), all collaborators and patients who made this study possible, especially the team at SOLTI and my lab Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS).

Together, we are advancing the future of breast cancer care.”

Elacestrant in women with estrogen receptor-positive and HER2-negative early breast cancer: results from the preoperative window-of-opportunity ELIPSE trial.

Authors: Maria Vidal, Claudette Falato, Tomás Pascual, Rodrigo Sanchez-Bayona, Montserrat Muñoz-Mateu, Isaac Cebrecos, Xavier Gonzalez-Farré, Tomás Cortadellas, Mireia Margelí Vila, Miguel A. Luna, Christian Siso, Kepa Amillano, Patricia Galván, Milana A. Bergamino, Juan M. Ferrero-Cafiero, Fernando Salvador, Alejandra Espinosa Guerrero, Laia Pare, Esther Sanfeliu, Aleix Prat, Meritxell Bellet.

Aleix Prat