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Study identifier: NCT06201234 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

Evaluating the Addition of Elacestrant (Oral SERD) to Olaparib (PARP-inhibitor) in Patients With Advanced/Metastatic HR+/HER2- Breast Cancer

Condition: Hormone Receptor Positive HER-2 Negative Breast Cancer · Advanced or Metastatic Breast Cancer · BRCA1 Mutation  ·  Sponsor: GBG Forschungs GmbH

PhasePhase 2
Planned participants176
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

Trial design: Phase II, prospective, multi-center, randomized, open label, parallel group study in patients with HR-positive, HER2-negative locally advanced or metastatic breast cancer with gBRCA1/2 mutation, with 2:1 randomization into Arm A (olaparib + elacestrant) or arm B (olaparib). Treatment in either arm will be given until disease progression, unacceptable toxicity, withdrawal of patient´s consent to study participation, or end of study. Trial population: Patients with HR-positive, HER2-negative locally advanced or metastatic breast cancer with gBRCA1/2 mutation, with an indication for standard-of-care PARP inhibitor therapy and planned treatment with olaparib, an ECOG performance status of 0-2 and life expectancy of \> 6 months, with normal bone marrow and kidney functions and no active or newly diagnosed central nervous system (CNS) metastases or symptomatic metastatic visceral disease at risk of life-threatening complications. Interventions: Patients randomized to Arm A will receive 600 mg olaparib daily and 400 mg elacestrant daily, while patients randomized to Arm B will receive 600 mg olaparib daily. Blood tests (hematology, biochemistry) will be performed at the beginning of every cycle, and imaging for tumor assessment (chest and abdominopelvic imaging) as well as QoL assessments will be performed every three months and in case of suspicion of progression/end of study.

This description comes directly from the study's public registry record.

Talk to the study team

Laura Steinmann  ·  +49 61027480  ·  element@gbg.de

Stefan Schoeffel  ·  +49 61027480  ·  element@gbg.de

Always discuss trial participation with your own doctor first.

Locations (36)

Vinzenz Von Paul Kliniken gGmbH - MarienhospitalStuttgart, Baden-Wurttemberg, GermanyRecruiting
University Hospital TübingenTübingen, Baden-Wurttemberg, GermanyRecruiting
Rems-Murr-Klinik-WinnendenWinnenden, Baden-Wurttemberg, GermanyRecruiting
GRN Klinik WeinheimWeinheim, Baden-Württembergs, GermanyRecruiting
Hämatologie-Onkologie im Zentrum MVZ GmbHAugsburg, Bavaria, GermanyRecruiting
Klinikum BayreuthBayreuth, Bavaria, GermanyRecruiting
Schwerpunktpraxis der Gynäkologie und OnkologieFürstenwalde, Brandenburg, GermanyRecruiting
Agaplesion Frankfurter Diakonie Kliniken gGmbHFrankfurt am Main, Hesse, GermanyRecruiting
Klinikum der J. W. Goethe UniversitätFrankfurt am Main, Hesse, GermanyRecruiting
Klinikum Kassel GmbH - FrauenklinikKassel, Hesse, GermanyRecruiting
St. Josefs-Hospital, Gynäkologie und GeburtshilfeWiesbaden, Hesse, GermanyRecruiting
Studien GbR BraunschweigBraunschweig, Lower Saxony, GermanyRecruiting

+ 24 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT06201234