Elacestrant in Advanced Triple Positive Breast Cancer

Summary

The purpose of this study to assess the safety and efficacy of elacestrant, a selective estrogen receptor degrader (SERD) and dual biologic therapy, trastuzumab and pertuzumab, in patients with triple-positive breast cancer with and without an ESR1 mutation.

Eligibility

Inclusion Criteria:

1. Female patients aged 18 years or older.
2. Should be able to provide the informed consent.
3. Histologically confirmed diagnosis of triple-positive breast cancer (ER+, PR+, HER2+). In the study, ER status will be considered positive if ≥10% of tumor cells demonstrate positive nuclear staining by immunohistochemistry, with PR\>1%. Patients may be considered to be enrolled on study with prior approval of study PI if ER \>10% and without PGR positivity HER2 status will be considered positive with the score of 3+ with immunohistochemistry staining or 2+ by immunohistochemistry and FISH -amplified as per ASCO CAP guidelines (2023)"
4. Disease progression on or after at least one line of NCCN recommended prior therapy
5. Eastern Cooperative Oncology Group (ECOG) performance status ≤ 2.
6. Patient has adequate organ function, as defined by the following laboratory values:

   1. Hematologic Value:
   2. Hemoglobin ≥9.0 g/dL, without transfusion or growth factors within 1 week
   3. Neutrophils ≥1.5×103/μL or ≥1.0×103/μL for participants with benign ethnic neutropenia
   4. Platelets ≥100×103/μL
   5. Patient must have a baseline LVEF ≥50 % or ≥ institutional LLN within 28 days prior to the study treatment.
7. Sex and Contraceptive/Barrier Requirements

   1. While on study treatment a participant must not breastfeed or be pregnant
   2. Have a negative highly sensitive (eg, beta-human chorionic gonadotropin \[β-hCG\]) pregnancy test at screening and agree to further pregnancy tests per the protocol.
   3. Practice at least 1 highly effective method of contraception; if oral contraceptives are used, a barrier method of contraception must also be used.
   4. Female participants (pre- or perimenopausal) must use the appropriate highly effective, non-hormonal contraception method within 28 days of the first dose of study treatment, until 7 months after the last dose of study treatment (or longer based on companion drug). Highly effective methods of contraception are those methods that can achieve a failure rate of less than 1% per year when used consistently and correctly are considered as highly effective birth control methods. Such methods include:

   i. intrauterine device (IUD) ii. bilateral tubal occlusion iii. vasectomized partner iv. sexual abstinence (i.e., refraining from heterosexual intercourse during the study treatment and 120 days after the last dose of study treatment).

   e. Unacceptable contraception methods: Periodic abstinence (calendar, symptothermal, post-ovulation methods), withdrawal (coitus interruptus), spermicides only, and lactational amenorrhoea methods are not acceptable methods of contraception. Female condom and male condom should not be used together.

Exclusion Criteria:

1. Prior treatment with a SERD.
2. Prior treatment with more than two lines of chemotherapy for metastatic disease, including antibody drug conjugates.
3. Untreated and/or active CNS metastases.
4. History of other malignancies within the past 5 years (except adequately treated non-melanoma skin cancer or carcinoma in situ of the cervix).
5. Inability to take oral medications, refractory or chronic nausea, gastrointestinal conditions (including significant gastric or bowel resection), history of malabsorption syndrome, or any other uncontrolled gastrointestinal condition that impact the absorption of the study drug
6. Known intolerance to elacestrant or any of its excipients
7. Uncontrolled active infection or intercurrent illness.

   1. Patients with known HBV and/or HCV infection must have undetectable viral load during screening (See Appendix B).
   2. Patients known to be HIV+ are allowed if they have undetectable viral load at baseline.
8. Patients who are on any of the prohibited medications listed in sections 7.6 and 7.4.
9. Male participants will not be included because Male breast cancer is rare and may differ biologically and hormonally, which would introduce heterogeneity difficult to address in a small, single arm phase II trial.

Conditions3

Interventions3

Locations1 site

Find trials near these locations

Related trials

• A Short-term Preoperative, Evaluating Activity and Safety of Elacestrant Monotherapy as Compared to Elacestrant + Ovarian Function Suppression (LHRH Agonist) in Premenopausal Patients With Stage I-II ER+/HER2- Breast Cancer — Gustave Roussy, Cancer Campus, Grand Paris
• Elacestrant + Everolimus in Patients ER+/HER2-, ESR1mut, Advanced Breast Cancer Progressing to ET and CDK4/6i. — MedSIR
• Elacestrant With/Without Triptorelin in Premenopausal Women With Luminal Breast Cancer — SOLTI Breast Cancer Research Group
• Elacestrant for Treating ER+/HER2- Breast Cancer Patients With ctDNA Relapse (TREAT ctDNA) — European Organisation for Research and Treatment of Cancer - EORTC
• Marker - Adjusted Therapy Comparing Adjuvant Elacestrant With Standard Endocrine Treatment in Genomically and/or Clinically High-risk ER+/HER2- eBC — West German Study Group
• Safety of Elacestrant in ER+/HER2- and ESR1 Mutations MBC — SciClone Pharmaceuticals
• A Study of Elacestrant Versus Standard Endocrine Therapy in Women and Men With ER+,HER2-, Early Breast Cancer With High Risk of Recurrence — Stemline Therapeutics, Inc.
• Open-Label Umbrella Study To Evaluate Safety And Efficacy Of Elacestrant In Various Combination In Participants With Metastatic Breast Cancer — Stemline Therapeutics, Inc.

Browse More Trials