Evaluating a new treatment for advanced breast cancer

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study evaluates the efficacy and safety of a combination treatment involving inavolisib, a CDK4/6 inhibitor, and letrozole compared to a placebo with the same CDK4/6 inhibitor and letrozole in patients with advanced breast cancer that is hormone receptor-positive and HER2-negative. The trial focuses on participants with PIK3CA mutations who have either newly diagnosed or relapsed disease after prior endocrine therapy. The study aims to determine if the new combination can improve outcomes in this specific patient population.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Women or men with histologically or cytologically confirmed carcinoma of the breast
* Documented ER-positive and/or progesterone receptor-positive tumor according to American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) guidelines
* Documented HER2-negative tumor according to ASCO/CAP guidelines
* De-novo HR+ , HER2- ABC, or, alternatively, relapsed HR+ , HER2- ABC after at least 2 years of standard neoadjuvant/adjuvant endocrine therapy without disease progression during that treatment and disease-free interval of at least 1 year since the completion of that treatment
* Participants who have bilateral breast cancers which are both HR-positive and HER2-negative
* Confirmation of biomarker eligibility
* Consent to provide fresh or archival tumor tissue specimen
* Measurable disease per Response Evaluation Criteria in Solid Tumors, Version 1.1 (RECIST v1.1)
* Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1
* Adequate hematologic and organ function within 14 days prior to initiation of study treatment

Exclusion Criteria:

* Pregnant or breastfeeding, or intention of becoming pregnant during the study or within the time frame in which contraception is required
* Metaplastic breast cancer
* Any prior systemic therapy for locally advanced unresectable or metastatic breast cancer
* Type 2 diabetes requiring ongoing systemic treatment at the time of study entry; or any history of Type 1 diabetes
* Any history of leptomeningeal disease or carcinomatous meningitis
* Known and untreated, or active CNS metastases. Participants with a history of treated CNS metastases are eligible
* Active inflammatory or infectious conditions in either eye or history of idiopathic or autoimmune-associated uveitis in either eye
* Symptomatic active lung disease
* History of or active inflammatory bowel disease
* Any active bowel inflammation
* Prior hematopoietic stem cell or bone marrow transplantation
* Treatment with strong cytochrome P450 (CYP) 3A4 inhibitors or strong CYP3A4 inducers within 4 weeks or 5 drug-elimination half-lives, prior to initiation of study treatment

Where it's running

• City of Hope - Phoenix
  Goodyear, Arizona, United States Recruiting
• The Dignity Health Cancer Institute
  Phoenix, Arizona, United States Recruiting
• Disney Family Cancer Center
  Burbank, California, United States Recruiting
• City of Hope - Lennar Foundation Cancer Center
  Irvine, California, United States Recruiting
• Scripps Health
  La Jolla, California, United States Recruiting
• City Of Hope
  Long Beach, California, United States Recruiting

+192 more sites. See ClinicalTrials.gov for the full list.

Study contacts

• Study coordinator: Reference Study ID Number: WO45654 https://forpatients.roche.com/ No attachments to email below.
• Email: global-roche-genentech-trials@gene.com
• Phone: 888-662-6728 (U.S. Only)

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

• Gyrotonic exercise for elders with breast cancer and Behcet disease

  We’re testing whether a gyrotonic exercise program helps older people who have both Behcet disease and breast cancer.

  Recruiting Cairo University · Giza, Dokki · NCT07929116

• PECS II vs SPSIP nerve blocks for pain after mastectomy

  This study tests whether two ultrasound-guided nerve blocks (PECS II and SPSIP) differ in how much opioid patients need after mastectomy.

  Recruiting Bursa City Hospital · Nilufer, Bursa · NCT07929090

• CG-7321: a first-in-human test in advanced solid tumors

  We’re testing CG-7321 alone and with fulvestrant to see if it’s safe and tolerable in adults with advanced solid tumors.

  Recruiting at 4 sites Phase 1 Chengdu Cynogen Bio-pharmaceutical Tech. Co., Ltd. · Fuzhou, Fujian and 3 other locations · NCT07923214

• Compare a new endoscopy-assisted breast-conserving surgery with the usual approach

  This study tests whether a new endoscopy-assisted breast-conserving technique can provide similar or better cosmetic outcomes and safety compared with conventional breast-conserving surgery in women with early breast cancer who want to preserve their breast.

  Recruiting Sir Run Run Shaw Hospital · Hangzhou, Zhejiang and 21 other locations · NCT07920094

• Different skin care approaches to prevent skin reactions after mastectomy radiation

  This study tests three standard skin care methods to see which best prevents radiation dermatitis in people who had a mastectomy and are receiving post-mastectomy radiation therapy.

  Recruiting at 7 sites Phase 2 Memorial Sloan Kettering Cancer Center · Basking Ridge, New Jersey and 6 other locations · NCT07918989

• 3D Heart Strain to Detect Early Cardiotoxicity in Cancer Therapy

  This study tests whether 3D echocardiography can detect early heart damage from cancer treatments like anthracyclines or HER2-targeted therapy better than standard 2D methods.

  Recruiting Region Skane · Lund, Skåne County · NCT07916337

How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.