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Study of the novel cancer drug GDC-0941 in combination with the approved anticancer drug fulvestrant, and the novel cancer drug GDC- 0980 in combination with fulvestrant, in patients with advanced breast cancer for whom treatment with an aromatase inhibitor is not effective

A phase II double-blind placebo-controlled randomized study of GDC-0941 or GDC-0980 with Fulvestrant versus Fulvestrant in advanced or metastatic breast cancer in patients resistant to aromatase inhibitor therapy

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
EU CTR
Registry ID
EUCTR2010-023763-17-BE
Enrollment
260
Registered
2011-07-26
Start date
2012-05-18
Completion date
Unknown
Last updated
2016-08-08

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Advanced or metastatic breast cancer resistant to aromatase inhibitor therapy MedDRA version: 14.1 Level: LLT Classification code 10027475 Term: Metastatic breast cancer System Organ Class: 100000004864

Interventions

Product Code: GDC-0941/RO5314482 Pharmaceutical Form: Film-coated tablet CAS Number: 957054-33-0 Current Sponsor code: GDC-0941/RO5314482 Other descriptive name: GDC-0941.180 Concentration unit: mg mi

Sponsors

Genentech, Inc.
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Age = 18 years 2. Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1 3. Postmenopausal women with locally advanced breast cancer previously treated with an aromatase inhibitor (AI) 4. ER-positive disease and HER2-negative disease 5. Measurable disease or non-measurable disease 6. Adequate hematologic and end-organ function Are the trial subjects under 18? no Number of subjects for this age range: F.1.2 Adults (18-64 years) yes F.1.2.1 Number of subjects for this age range 143 F.1.3 Elderly (>=65 years) yes F.1.3.1 Number of subjects for this age range 117

Exclusion criteria

Exclusion criteria: 1. Prior treatment with fulvestrant, PI3K inhibitor, or mTOR inhibitor for advanced breast cancer or MBC 2. Prior anti-cancer therapy or radiotherapy within 2 weeks prior to Day 1 of Cycle 1 3. Prior treatment with > 1 cytotoxic chemotherapy regimens or experienced recurrent or progressive disease on > 2 endocrine therapies for MBC 4. Patients requiring anti-hyperglycemic therapy 5. Clinically significant cardiac or pulmonary dysfunction 6. Clinically significant history of liver disease, including cirrhosis, current alcohol abuse, or current known active infection with hepatitis B virus, or hepatitis C virus 7. Need for current chronic corticosteroid therapy 8. Known untreated or active CNS metastases

Design outcomes

Primary

MeasureTime frame
Main Objective: •To evaluate the efficacy (as measured by PFS) of fulvestrant + GDC-0941 versus fulvestrant + placebo •To evaluate the safety of fulvestrant+GDC 0941 and fulvestrant + GDC 0980 versus fulvestrant + placebo ;Secondary Objective: •To assess the clinical activity, as measured by response rate, duration of response, and CBR of fulvestrant + GDC 0941 versus fulvestrant + placebo • To assess the prognostic effects of PIK3CA mutations on PFS in patients with ER-positive advanced breast cancer ;Primary end point(s): PFS, defined as the time from the first dose of fulvestrant on Cycle 1 Day 1 to the first observation of disease progression as assessed by the investigator per modified RECIST version 1.1 (v1.1) or death from any cause on study (<= 30 days after the last dose of study treatment);Timepoint(s) of evaluation of this end point: Tumor assessments at end of Cycles 2, 4, 6 and 8 and every 3 cycles thereafter

Secondary

MeasureTime frame
Secondary end point(s): - Objective tumor response as assessed by the investigator per modified RECIST v1.1 - Clinical benefit defined as PR, CR, or stable disease, lasting for at least 6 months (i.e., 26 weeks) - Duration of confirmed objective response, defined as the time from first observation of an objective tumor response until first observation of disease progression as assessed by the investigator per modified RECIST v1.1 - The mutational status of PIK3CA and the presence of complete loss of the PTEN as determined by IHC;Timepoint(s) of evaluation of this end point: Tumor assessments at end of Cycles 2, 4, 6 and 8 and every 3 cycles thereafter

Countries

Australia, Belgium, Canada, Chile, Czech Republic, Denmark, France, Germany, Hong Kong, Hungary, Israel, Italy, Korea, Republic of, Malaysia, Mexico, New Zealand, Peru, Russian Federation, Singapore, Spain, Thailand, United Kingdom, United States

Contacts

Public ContactTrial Information Support Line-TISL

Genentech Inc. c/o F. Hoffmann-La Roche Ltd

global.rochegenentechtrials@roche.com+41616881111

Outcome results

None listed

Source: EU CTR (via WHO ICTRP) · Data processed: Feb 4, 2026