On August 19, 2022 The Menarini Group ("Menarini"), a privately held Italian pharmaceutical and diagnostics company, and Stemline Therapeutics ("Stemline"), a wholly-owned subsidiary of the Menarini Group, reported that EMA has validated the Marketing Authorization Application (MAA) for elacestrant, a selective estrogen receptor degrader (SERD), for patients with ER+/HER2- advanced or metastatic breast cancer (Press release, Menarini, AUG 19, 2022, View Source;Advanced-or-Metastatic-Breast-Cancer/?feedref=JjAwJuNHiystnCoBq_hl-RLXHJgazfQJNuOVHefdHP-D8R-QU5o2AvY8bhI9uvWSD8DYIYv4TIC1g1u0AKcacnnViVjtb72bOP4-4nHK5ieT3WxPE8m_kWI77F87CseT [SID1234618503]). Validation of the application confirms the submission is complete and begins EMA’s centralized review procedure.
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"There is a major unmet need in the treatment of advanced or metastatic ER+/HER2- breast cancer after resistance builds in the earlier lines of treatment," commented Elcin Barker Ergun, Chief Executive Officer of the Menarini Group. "The acceptance of our application for review by the EMA represents a significant step for our company and we look forward to working with the agency to potentially bring elacestrant to patients suffering from second- and third-line ER+/HER2- advanced or metastatic breast cancer in Europe."
The Phase 3 EMERALD study (NCT03778931) evaluated elacestrant compared to SOC endocrine monotherapy (investigators’ choice of either fulvestrant or an aromatase inhibitor) in ER+/HER2- advanced or metastatic breast cancer patients. The study results were recently published online in the Journal of Clinical Oncology (JCO) on May 18, 2022. Further post-hoc analysis from the study will be presented at the European Society for Medical Oncology (ESMO) (Free ESMO Whitepaper) Congress 2022 taking place September 9-13, 2022, in Paris, France.
The Menarini Group obtained global licensing rights for elacestrant in July 2020 from Radius Health, Inc, who conducted and successfully completed the EMERALD study. Based on the positive phase 3 data, Stemline submitted a MAA to EMA on July 27, 2022. The regulatory review for elacestrant is also underway in the U.S. as the Food and Drug Administration (FDA) has recently accepted a New Drug Application for elacestrant designating a Priority Review. The Menarini Group is now fully responsible for global registration, commercialization and further development activities for elacestrant.
About Elacestrant (RAD1901) and the EMERALD Phase 3 Study
Elacestrant is an investigational selective estrogen receptor degrader (SERD). In 2018, elacestrant received Fast Track designation from the FDA. Preclinical studies completed prior to EMERALD indicate that the compound has the potential for use as a single agent or in combination with other therapies for the treatment of breast cancer. The EMERALD Phase 3 trial is a randomized, open label, active-controlled study evaluating elacestrant as second- or third-line monotherapy in ER+/HER2- advanced/metastatic breast cancer patients. The study enrolled 477 patients who had received prior treatment with one or two lines of endocrine therapy, including a CDK 4/6 inhibitor. Patients in the study were randomized to receive either elacestrant or the investigator’s choice of an approved hormonal agent. The primary endpoint of the study was progression-free survival (PFS) in the overall patient population and in patients with estrogen receptor 1 gene (ESR1) mutations. Secondary endpoints included evaluation of overall survival (OS), objective response rate (ORR), and duration of response (DOR) and safety.