A Study Evaluating Adherence, Tolerability, and Patient Reported Outcomes of Giredestrant in Participants With ER+/HER2- Early Breast Cancer Who Are Intolerant to Adjuvant Aromatase Inhibitor Therapy (novERA Breast Cancer)

Phase 3Not Yet RecruitingNCT07541079

Genentech, Inc.300 enrolled

Overview

The purpose of this study is to understand treatment adherence and patient-reported outcomes of switching to giredestrant due to prior aromatase inhibitor (AI) intolerance. Giredestrant will be administered as adjuvant endocrine therapy for participants with low-, medium-, and high-risk, Stage I-III, histologically confirmed, estrogen receptor positive (ER+), human epidermal growth factor receptor 2 negative (HER2-), early breast cancer (eBC), as defined by the investigator. Participants will enroll if considered to be intolerant to a prior adjuvant AI therapy.

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

300

Conditions

Early Breast Cancer

Interventions

Giredestrant

Eligibility

Sex: FEMALEMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Considered appropriate for treatment with endocrine therapy (ET) * Histologically confirmed diagnosis of ER+/HER2-, Stage I-III (low-/medium-/high-risk) early breast cancer (eBC) * Documented ER+ tumor according to American Society of Clinical Oncology (ASCO)/College of American Pathologists (CAP), defined as ≥1% of tumor cells stained positive * Documented HER2- tumor according to ASCO/CAP * Postmenopausal females at the time of signing the Informed Consent Form * Documented use of a prior adjuvant aromatase inhibitor (AI) (i.e., anastrozole, exemestane, or letrozole) for a total of ≥6 months * Documented use of an adjuvant AI (i.e., anastrozole, exemestane, or letrozole) for the consecutive ≥3 months immediately prior to consent * Participant and investigator agree that current symptoms on AI are intolerable and warrant a switch in therapy to attempt sustained treatment * Documented Grade 2 or 3 adverse events, per NCI CTCAE v6.0, determined by the investigator to be associated with AI therapy's intolerance * Participant and investigator planning the first switch from an AI * Has completed the following: (neo)adjuvant chemotherapy (if administered), definitive surgery of primary breast tumor(s) and/or axillary lymph nodes dissection (ALND) and/or sentinel lymph node biopsy (SLNB) and/or radiotherapy * Eastern Cooperative Oncology Group Performance (ECOG) Performance Status 0 or 1 Exclusion Criteria: * Participation within 6 months before enrollment in any other clinical study involving an investigational adjuvant treatment including anti-cancer agents * Diagnosis of rheumatoid arthritis, psoriatic arthritis, or other inflammatory connective tissue disease * Any prior fulvestrant or any oral selective estrogen receptor degraders (SERDs) * Have active cardiac disease or history of cardiac dysfunction * Have clinically significant liver disease consistent with Child-Pugh Class B or C, including active hepatitis (e.g., hepatitis B virus \[HBV\] or hepatitis C virus \[HCV\]), current alcohol abuse, cirrhosis, or positive test for viral hepatitis * Treatment with strong CYP3A inhibitors or inducers within 14 days or 5 drug elimination half-lives (whichever is longer) prior to initiation of study treatment * Have had any serious medical condition or abnormality in clinical laboratory tests that, in the investigator's judgment, precludes an individual's safe participation in and completion of the study

Outcomes

Primary Outcomes

Incidence of Participants Who Have Discontinued Giredestrant for Any Reason at 12 Months

Time frame: At 12 months

Incidence and Severity of Adverse Events, with Severity Determined According to the National Cancer Institute Common Terminology Criteria of Adverse Events, version 6.0 (NCI CTCAE v6.0)

Time frame: From baseline until 28 days after the final dose of study drug (up to 4 years, 7 months)

Secondary Outcomes

Percentage of Participants Achieving an Improvement in Individual Endocrine Therapy-specific Symptoms at 6 and 12 Months, Using the FACT-ES Questionnaire

An improvement in individual endocrine therapy-specific symptoms (joint pain, hot flashes, vaginal dryness, and sexual dysfunction) is defined as ≥1-point/shift increase from baseline in the respective Functional Assessment of Cancer Therapy-Endocrine Symptoms (FACT-ES) questionnaire items.