For Healthcare Professionals

Study Assessing the Efficacy and Safety of Treatment With Alpelisib Plus Fulvestrant in Japanese Men and Postmenopausal Women With Advanced Breast Cancer


About the study

The purpose of this study is to assess the safety and efficacy of alpelisib plus fulvestrant in men and postmenopausal women with hormone receptor (HR) positive, human epidermal growth factor 2 (HER2)-negative, advanced breast cancer harboring a PIK3CA mutation in Japan, whose disease has progressed on or after aromatase inhibitor (AI) treatment regardless of prior CDK4/6 inhibitor use.

Who can take part

You may be eligible to participate in the study if you meet the following criteria:


Inclusion Criteria:

  1. Japanese man or postmenopausal woman
  2. Participant has adequate tumor tissue for the analysis of PIK3CA mutational status by a Novartis designated laboratory.
  3. Participant has identified PIK3CA mutation (as determined by a Novartis designated laboratory)
  4. Participant has a histologically and/or cytologically confirmed diagnosis of ER+ and/or PgR+ breast cancer by local laboratory
  5. 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 (FISH, CISH or SISH) test is required by local laboratory testing
  6. Participant has measurable disease, i.e., at least one measurable lesion as per RECIST 1.1
  7. Participant has advanced breast cancer
  8. Participant has ECOG performance status 0 or 1


Exclusion Criteria:

  1. Participant with symptomatic visceral disease or any disease burden that makes the participant ineligible for endocrine therapy per the investigator's best judgment
  2. Participant has received prior treatment;
  3. with chemotherapy (except for neoadjuvant/ adjuvant chemotherapy), fulvestrant, any PI3K, mTOR or AKT inhibitor for Cohort 1 and 3
  4. with chemotherapy (except for neoadjuvant/ adjuvant chemotherapy), fulvestrant, any PI3K, mTOR, AKT inhibitor or CDK 4/6 inhibitor for Cohort 2
  5. Participant has a known hypersensitivity to alpelisib or fulvestrant, or to any of the excipients of alpelisib or fulvestrant
  6. Participant with inflammatory breast cancer at screening
  7. Participant is concurrently using other anti-cancer therapy
  8. Participant has had surgery within 14 days prior to starting study drug or has not recovered from major side effects
  9. Participant with an established diagnosis at screening of diabetes mellitus type I or not controlled type II (based on FPG and HbA1c)
  10. Participant has currently documented pneumonitis /interstitial lung disease
  11. History of acute pancreatitis within 1 year of screening or past medical history of chronic pancreatitis
  12. Participant with unresolved osteonecrosis of the jaw
  13. Participant has a history of severe cutaneous reactions

Other protocol-defined inclusion/exclusion criteria may apply

pin location

Study Locations

Enter your ZIP code/Postal code/PIN code to locate study sites near you:

How to Apply

Contact the study center to learn if this study is a good match for you.

Study’s details


Advanced Breast Cancer

Age (in years)



Phase 2

Participants needed


Est. Completion Date

Jan 31, 2025

Treatment type



Novartis identifier


Study number


Understanding Clinical Trials

Get answers to your questions about clinical trials.What is a clinical research?What does taking part in clinical trials involve?What should I ask the trial doctor?


Sign up to save your favorites, 
receive newsletters, resources, and alerts 
about clinical trials related to your conditions of interest.