Study to Assess the Efficacy and Safety of Alpelisib Plus Fulvestrant in Participants With HR-postitive (HR+), HER2-negative, Advanced Breast Cancer After Treatment With a CDK4/6 Inhibitor and an Aromatase Inhibitor. (EPIK-B5)
Breast Cancer
About this trial
This is an interventional treatment trial for Breast Cancer focused on measuring Alpelisib, Fulvestrant, Advanced breast cancer, Phase III, HR-positive, HER-2 negative, CDK4/6 inhibitor, PIK3CA mutation, Progression free survival, aromatase inhibitor
Eligibility Criteria
Inclusion Criteria:
- Participant is an adult ≥ 18 years old at the time of informed consent and has signed informed consent before any trial related activities and according to local guidelines.
- If female, then the participant must be in postmenopausal status. Postmenopausal status is defined either by: prior bilateral oophorectomy, age ≥60 or age <60 and amenorrheic for 12 or more months in the absence of chemotherapy, tamoxifen, toremifene, or ovarian suppression and follicle-stimulating hormone (FSH) and estradiol in the postmenopausal range per local normal range.
- Participant has a histologically and/or cytologically confirmed diagnosis of ER+ and/or PgR+ breast cancer by local laboratory.
- Participant has HER2-negative breast cancer defined as a negative in situ hybridization test or an IHC status of 0, 1+ or 2+. If IHC is 2+, a negative in situ hybridization (Fluorescent in situ hybridization (FISH), Chromogenic in situ hybridization (CISH), or Silver-enhanced in situ hybridization (SISH)) test is required by local laboratory testing.
- Participant has at least one measurable lesion as per RECIST v1.1 criteria as assessed by BIRC (a lesion at a previously irradiated site may only be counted as a target lesion if there is clear sign of progression since the irradiation).
- Participant has recurrence or progression of disease during or after combined AI (i.e. letrozole, anastrozole, exemestane) and CDK4/6 inhibitor therapy. The combined AI and CDK4/6 inhibitor therapy does not need to be the latest treatment regimen (including adjuvant setting).
- Participant has received ≤1 line of prior treatment with chemotherapy (except for neoadjuvant/ adjuvant chemotherapy).
- Participant must show the presence of a PIK3CA mutation(s) determined by tissue either by a local laboratory using only CE-marked IVD assays such as QIAGEN Therascreen® PIK3CA RGQ PCR test or by a Novartis designated laboratory.
Exclusion Criteria:
- Participant with symptomatic visceral disease that makes the participant ineligible for endocrine therapy (ET) per the investigator's best judgment.
- Participant who relapsed with documented evidence of progression more than 12 months from completion of (neo)adjuvant endocrine therapy with no treatment for metastatic disease
- Participant has received prior treatment with fulvestrant, any Phosphatidylinositol-3-Kinase (PI3K), mammalian Target of Rapamycin (mTOR) or Protein Kinase B (AKT) inhibitor
Other Inclusion and Exclusion Criteria do apply
Sites / Locations
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Arms of the Study
Arm 1
Arm 2
Experimental
Placebo Comparator
Alpelisib plus fulvestrant
Alpelisib-matching placebo plus fulvestrant
Alpelisib 300 mg orally once daily on a continuous dosing schedule, in a 28-day cycle + fulvestrant 500 mg as intramuscular injection on Cycle 1 Day 1 and 15, and on Day 1 on every Cycle thereafter, in a 28 days cycle.
Alpelisib-matching placebo orally once daily on a continuous dosing schedule, in a 28-day cycle + fulvestrant 500 mg as intramuscular injection on Cycle 1 Day 1 and 15 and on Day 1 on every Cycle thereafter, in a 28 days cycle. Participants who have disease progression per RECIST v1.1 as assessed by BIRC will have the option to crossover to be treated with alpelisib plus fulvestrant