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A Trial to Evaluate Efficacy and Safety of Ribociclib With Endocrine Therapy as Adjuvant Treatment in Patients With HR+ / HER2- Early Breast Cancer

Trial Status: Active

A phase III multi-center, randomized, open-label trial to evaluate efficacy and safety of ribociclib with endocrine therapy as adjuvant treatment in patients with HR+ / HER2- Early Breast Cancer

Inclusion Criteria

  • Patient is ≥ 18 years-old at the time of PICF signature
  • Patient is female with known menopausal status at the time of randomization or initiation of adjuvant ET (whichever occurs earlier), or male.
  • Patient with histologically confirmed unilateral primary invasive adenocarcinoma of the breast with a date of initial cytologic or histologic diagnosis within 18 months prior to randomization.
  • Patient has breast cancer that is positive for ER and/or PgR
  • Patient has HER2-negative breast cancer
  • Patient has available archival tumor tissue from the surgical specimen
  • Patient after surgical resection where tumor was removed completely, with the final surgical specimen microscopic margins free from tumor, and belongs to one of the following categories: anatomic stage group II or III
  • If indicated, patient has completed adjuvant and/or neoadjuvant chemotherapy according to the institutional guidelines
  • If indicated, patient has completed adjuvant radiotherapy according to the institutional guidelines
  • Patient has an Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1.
  • Patient has no contraindication for the adjuvant ET in the trial and is planned to be treated with ET for 5 years

Exclusion Criteria

  • Patient has received any CDK4/6 inhibitor
  • Patient has received prior treatment with tamoxifen, raloxifene or AIs for reduction in risk ("chemoprevention") of breast cancer and/or treatment for osteoporosis within the last 2 years prior to randomization. Patient is concurrently using hormone replacement therapy.
  • Patient has received prior treatment with anthracyclines at cumulative doses of 450 mg/m² or more for doxorubicin, or 900 mg/m² or more for epirubicin.
  • Patient with a known hypersensitivity to any of the excipients of ribociclib and/or ET
  • Patient with distant metastases of breast cancer beyond regional lymph nodes (stage IV according to AJCC 8th edition) and/or evidence of recurrence after curative surgery.
  • Patient is concurrently using other anti-neoplastic therapy with the exception of adjuvant ET
  • Patient has had major surgery, chemotherapy or radiotherapy within 14 days prior to randomization
  • Patient has not recovered from clinical and laboratory acute toxicities related to prior anti-cancer therapies
  • Patient has a concurrent invasive malignancy or a prior invasive malignancy whose treatment was completed within 2 years before randomization
  • Patient has known HIV infection, Hepatitis B or C infection
  • Clinically significant, uncontrolled heart disease and/or cardiac repolarization abnormality
  • Patient is currently receiving any of the following substances within 7 days before randomization - Concomitant medications, herbal supplements, and/or fruits that are known as strong inhibitors or inducers of CYP3A4/5 or Medications that have a narrow therapeutic window and are predominantly metabolized through CYP3A4/5
  • is currently receiving or has received systemic corticosteroids ≤ 2 weeks prior to starting trial treatment
  • Patient has impairment of GI function or GI disease that may significantly alter the absorption of the oral trial treatments
  • Patient has any other concurrent severe and/or uncontrolled medical condition that would, in the Investigator's judgment, cause unacceptable safety risks, contraindicate patient participation in the clinical trial or compromise compliance with the protocol
  • Participation in other studies involving investigational drug(s) within 30 days prior to randomization or within 5 half-lives of the investigational drug(s) (whichever is longer), or participation in any other type of medical research judged not to be scientifically or medically compatible with this trial.
  • Pregnant or breast-feeding (lactating) women or women who plan to become pregnant or breast-feed during the trial


University of Alabama at Birmingham Cancer Center
Contact: Ahmed Elkhanany
Phone: 205-934-7825


Los Angeles
Translational Research In Oncology - US Inc
UCLA / Jonsson Comprehensive Cancer Center
Status: ACTIVE
Contact: Kyanne O'Bryant
Phone: 310-794-6500
Palo Alto
Stanford Cancer Institute Palo Alto
Status: ACTIVE
San Francisco
UCSF Medical Center-Mount Zion
Status: ACTIVE
Contact: UCSF Clinical Trials
Phone: 877-827-3222


University of Colorado
Status: ACTIVE


New Haven
Yale University


University of Miami Miller School of Medicine-Sylvester Cancer Center


Emory University Hospital / Winship Cancer Institute
Emory University Hospital Midtown
Status: ACTIVE


Kansas City
University of Kansas Cancer Center
Status: ACTIVE
Contact: Rebecca P Colgan
Phone: 913-588-7549


Massachusetts General Hospital Cancer Center
Status: ACTIVE


Ann Arbor
University of Michigan Comprehensive Cancer Center
Status: ACTIVE

New York

New York
Laura and Isaac Perlmutter Cancer Center at NYU Langone
Status: ACTIVE


M D Anderson Cancer Center
Status: ACTIVE


Fred Hutch / University of Washington Cancer Consortium
Status: ACTIVE


University of Wisconsin Hospital and Clinics

Trial Phase Phase III

Trial Type Treatment

Lead Organization
Novartis Pharmaceuticals Corporation

  • Primary ID CLEE011O12301C
  • Secondary IDs NCI-2019-01526
  • ID NCT03701334