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Study Of CP-751,871 In Combination With Exemestane In Postmenopausal Women With Hormone Receptor Positive Advanced Breast Cancer

A Two-arm Randomized Open Label Phase 2 Study Of Cp-751,871 In Combination With Exemestane Versus Exemestane Alone As First Line Treatment For Postmenopausal Patients With Hormone Receptor Positive Advanced Breast Cancer

Status
Terminated
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00372996
Enrollment
219
Registered
2006-09-07
Start date
2007-02-28
Completion date
2014-06-30
Last updated
2015-10-28

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

Conditions

Breast Neoplasms

Brief summary

To test the efficacy of CP-751,871 combined with exemestane in the treatment of postmenopausal patients with hormone positive advanced breast cancer

Interventions

CP-751,871 given at 20 mg/kg IV on day 1 of each 21 day cycle.

DRUGexemestane

Exemestane given at 25 mg orally once a day.

DRUGFulvestrant

Used for salvage therapy and administered according to the local label and standard clinical practice.

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Postmenopausal women with a diagnosis of hormone receptor positive advanced breast cancer * HbA1c \<5.7%

Exclusion criteria

* Previous treatment for advanced disease

Design outcomes

Primary

MeasureTime frameDescription
Progression-Free Survival (PFS)Baseline, Day 1 of Cycles 2 and 4 and then Day 1 of every 3rd cycle starting at Cycle 7 up to 60 monthsPFS was calculated from the time of randomization to either progression of disease, death, or treatment discontinuation because of unsatisfactory therapy results (such as global deterioration of health status). Disease progression was defined as 1 or more of the following: radiographic progression (20 percent \[%\] increase in measurable lesions, appearance of new lesions or unequivocal progression of evaluable lesions as defined by Response Evaluation Criteria in Solid Tumors \[RECIST\]); occurrence of new pleural/pericardial effusions or ascites confirmed by positive cytology; persistent hypercalcemia requiring more than 2 IV treatments with bisphosphonates; intervention for any cancer-related events (radiations, surgery) or new symptoms related to tumor growth requiring participant discontinuation; development of brain metastasis; or death for any cause. Median PFS was estimated from the Kaplan-Meier curve. 95% confidence interval (CI) is based on the Brookmeyer and Crowley method.
PFS in Participants With Hemoglobin A1c (HbA1c) Less Than (<) 5.7% at BaselineBaseline, Day 1 of Cycles 2 and 4 and then Day 1 of every 3rd cycle starting at Cycle 7 up to 60 monthsPFS was calculated from the time of randomization to either progression of disease, death, or treatment discontinuation because of unsatisfactory therapy results (such as global deterioration of health status). Disease progression was defined as 1 or more of the following: radiographic progression (20% increase in measurable lesions, appearance of new lesions or unequivocal progression of evaluable lesions as defined by RECIST); occurrence of new pleural/pericardial effusions or ascites confirmed by positive cytology; persistent hypercalcemia requiring more than 2 IV treatments with bisphosphonates; intervention for any cancer-related events (radiations, surgery) or new symptoms related to tumor growth requiring participant discontinuation; development of brain metastasis; or death for any cause. Median PFS was estimated from the Kaplan-Meier curve. 95% CI is based on the Brookmeyer and Crowley method.

Secondary

MeasureTime frameDescription
Minimum Plasma Concentration of CP-751,871Predose on Day 1 at Cycles 1, 2, 4, and 5 and 150 days post last dose of CP-751,871 and for salvage therapy, at Day 1 and 150 days post last dose of CP-751,871
Area Under the Concentration Time Curve From Time 0 to the Last Time Point With Quantifiable ConcentrationPredose on Day 1 at Cycles 1, 2, 4, and 5 and 150 days post last dose of CP-751,871 and for salvage therapy, at Day 1 and 150 days post last dose of CP-751,871
Number of Participants With Negative Human Anti-Human Antibodies (HAHAs)Predose on Day 1 of Cycle 1 and at 150 days post last CP-751,871 infusionNegative human anti-human antibodies were defined as \<6.64
Percentage of Participants Achieving Complete Response (CR), Partial Response (PR), or Stable Disease (SD) Maintained for at Least 6 MonthsBaseline, Day 1 of Cycles 2 and 4 and then Day 1 of every 3rd cycle starting at Cycle 7 up to 60 monthsObjective responses were defined using RECIST as CR: disappearance of all target and nontarget lesions. PR: at least a 30% decrease in the sum of the longest diameter (LD) of target lesions, taking as a reference the baseline sum LD. Nontarget lesions may persist provided there is no unequivocal progression in these lesions. SD: measurements demonstrating neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify as progressive disease (PD) during the first 6 weeks after the start of treatment taking as reference the smallest sum LD since the treatment started. During this time, nontarget lesions may persist provided there is no unequivocal progression in these lesions.
Percentage of Participants With Serum Markers Relevant to the IGF-1R PathwayPredose on Day 1 of Cycles 1 and 4 and at end of treatment prior to beginning salvage therapy
European Organization for the Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire 30 (QLQ-C30) ScoresPredose on Day 1 of each cycle, at the end of treatment and at follow-up, up to 60 monthsEORTC QLQ-C30: included functional scales (physical, role, cognitive, emotional, and social), global health status, symptom scales (fatigue, pain, nausea/vomiting) and single items (dyspnoea, appetite loss, insomnia, constipation/diarrhea and financial difficulties). Most questions used 4 point scale (1 'Not at all' to 4 'Very much'; 2 questions used 7-point scale (1 'very poor' to 7 'Excellent'). Scores averaged, transformed to 0-100 scale; higher score equals (=) better level of functioning or greater degree of symptoms.
EORTC QLQ Breast Cancer Module (BR23) ScoresPredose on Day 1, at end of treatment, and at Follow-up, up to 60 monthsEORTC-QLQ-BR23: included functional scales (body image, sexual functioning, sexual enjoyment, and future perspective) and single item symptoms scales (systemic therapy side effects, breast symptoms, arm symptoms, and upset by hair loss). Questions used 4-point Likert scale (1 ‘Not at All’ to 4 ‘Very Much’). Scores averaged and transformed to 0-100 scale. High score for functional scale=high/healthy level of functioning. High score for single item=high level of symptomatology/problems. Change from baseline=Cycle/Day score minus baseline score.
Percentage of Participants With Circulating Tumor Cells Expressing Insulin-Like Growth Factor 1 Receptor (IGF-IR)Predose on Day 1 of Cycle 1
Maximum Plasma Concentration of CP-751,871Predose on Day 1 at Cycles 1, 2, 4, and 5 and 150 days post last dose of CP-751,871 and for salvage therapy, at Day 1 and 150 days post last dose of CP-751,871

Countries

Argentina, Belgium, Brazil, Canada, Italy, Netherlands, Sweden, United Kingdom, United States

Participant flow

Participants by arm

ArmCount
CP-751,871 + Exemestane
Participants received CP-751,871 20 mg/kg on Day 1 of each 3-week cycle as an IV infusion in combination with exemestane 25 mg tablets, by mouth, once daily, until disease progression. Participants who experienced disease progression could have received salvage therapy with CP-751,871 20 mg/kg on Day 1 of each 4-week cycle in combination with fulvestrant, administered according to the local label and standard clinical practice. Participants continued salvage treatment if safety and clinical benefit were observed for up to a total of 26 cycles or beyond, if there was continued clinical benefit, safety, and tolerability.
115
Exemestane
Participants received exemestane 25 mg tablets, by mouth, once daily, until disease progression. Participants who experienced disease progression could have received salvage therapy with CP-751,871 20 mg/kg on Day 1 of each 3-week cycle in combination with exemestane 25 mg tablets, by mouth, once daily, for up to a total of 20 months or beyond if safety and clinical benefit were observed.
104
Total219

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003
Overall StudyDeath11487
Overall StudyLost to Follow-up0201
Overall StudyOther10277
Overall StudyStudy Terminated by Sponsor4040
Overall StudyWithdrawal by Subject12695

Baseline characteristics

CharacteristicCP-751,871 + ExemestaneExemestaneTotal
Age, Continuous61.2 Years
STANDARD_DEVIATION 10.77
62.7 Years
STANDARD_DEVIATION 10.86
61.9 Years
STANDARD_DEVIATION 10.82
Sex: Female, Male
Female
115 Participants104 Participants219 Participants
Sex: Female, Male
Male
0 Participants0 Participants0 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
— / —— / —— / —— / —
other
Total, other adverse events
113 / 11534 / 3696 / 10443 / 43
serious
Total, serious adverse events
38 / 11511 / 3623 / 10415 / 43

Outcome results

Primary

PFS in Participants With Hemoglobin A1c (HbA1c) Less Than (<) 5.7% at Baseline

PFS was calculated from the time of randomization to either progression of disease, death, or treatment discontinuation because of unsatisfactory therapy results (such as global deterioration of health status). Disease progression was defined as 1 or more of the following: radiographic progression (20% increase in measurable lesions, appearance of new lesions or unequivocal progression of evaluable lesions as defined by RECIST); occurrence of new pleural/pericardial effusions or ascites confirmed by positive cytology; persistent hypercalcemia requiring more than 2 IV treatments with bisphosphonates; intervention for any cancer-related events (radiations, surgery) or new symptoms related to tumor growth requiring participant discontinuation; development of brain metastasis; or death for any cause. Median PFS was estimated from the Kaplan-Meier curve. 95% CI is based on the Brookmeyer and Crowley method.

Time frame: Baseline, Day 1 of Cycles 2 and 4 and then Day 1 of every 3rd cycle starting at Cycle 7 up to 60 months

Population: FAS; only participants with baseline HbA1c \<5.7% were included in the analysis.

ArmMeasureValue (MEDIAN)
CP-751,871 + ExemestanePFS in Participants With Hemoglobin A1c (HbA1c) Less Than (<) 5.7% at Baseline13.2 months
ExemestanePFS in Participants With Hemoglobin A1c (HbA1c) Less Than (<) 5.7% at Baseline9.9 months
p-value: 0.33170% CI: [0.572, 1.02]Log Rank
Primary

Progression-Free Survival (PFS)

PFS was calculated from the time of randomization to either progression of disease, death, or treatment discontinuation because of unsatisfactory therapy results (such as global deterioration of health status). Disease progression was defined as 1 or more of the following: radiographic progression (20 percent \[%\] increase in measurable lesions, appearance of new lesions or unequivocal progression of evaluable lesions as defined by Response Evaluation Criteria in Solid Tumors \[RECIST\]); occurrence of new pleural/pericardial effusions or ascites confirmed by positive cytology; persistent hypercalcemia requiring more than 2 IV treatments with bisphosphonates; intervention for any cancer-related events (radiations, surgery) or new symptoms related to tumor growth requiring participant discontinuation; development of brain metastasis; or death for any cause. Median PFS was estimated from the Kaplan-Meier curve. 95% confidence interval (CI) is based on the Brookmeyer and Crowley method.

Time frame: Baseline, Day 1 of Cycles 2 and 4 and then Day 1 of every 3rd cycle starting at Cycle 7 up to 60 months

Population: Full Analysis Set (FAS): all enrolled participants; grouped by randomized arm, where the first 10 participants enrolled but not randomly assigned to treatment were not included.

ArmMeasureValue (MEDIAN)
CP-751,871 + ExemestaneProgression-Free Survival (PFS)11.0 months
ExemestaneProgression-Free Survival (PFS)9.2 months
p-value: 0.5680% CI: [0.744, 1.118]Log Rank
Secondary

Area Under the Concentration Time Curve From Time 0 to the Last Time Point With Quantifiable Concentration

Time frame: Predose on Day 1 at Cycles 1, 2, 4, and 5 and 150 days post last dose of CP-751,871 and for salvage therapy, at Day 1 and 150 days post last dose of CP-751,871

Population: The study was terminated early due to strategic reasons and PK sampling was discontinued by Protocol Amendment 6. Therefore, the analysis was not performed and an incomplete data set was not reported because it would potentially skew the data, and is not statistically relevant, thus could be misleading.

Secondary

EORTC QLQ Breast Cancer Module (BR23) Scores

EORTC-QLQ-BR23: included functional scales (body image, sexual functioning, sexual enjoyment, and future perspective) and single item symptoms scales (systemic therapy side effects, breast symptoms, arm symptoms, and upset by hair loss). Questions used 4-point Likert scale (1 ‘Not at All’ to 4 ‘Very Much’). Scores averaged and transformed to 0-100 scale. High score for functional scale=high/healthy level of functioning. High score for single item=high level of symptomatology/problems. Change from baseline=Cycle/Day score minus baseline score.

Time frame: Predose on Day 1, at end of treatment, and at Follow-up, up to 60 months

Population: The study was terminated early secondary to strategic reasons and the questionnaires were discontinued by Protocol Amendment 6. Therefore, the analysis was not performed and an incomplete data set was not reported because it would potentially skew the data, and is not statistically relevant, thus could be misleading.

Secondary

European Organization for the Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire 30 (QLQ-C30) Scores

EORTC QLQ-C30: included functional scales (physical, role, cognitive, emotional, and social), global health status, symptom scales (fatigue, pain, nausea/vomiting) and single items (dyspnoea, appetite loss, insomnia, constipation/diarrhea and financial difficulties). Most questions used 4 point scale (1 'Not at all' to 4 'Very much'; 2 questions used 7-point scale (1 'very poor' to 7 'Excellent'). Scores averaged, transformed to 0-100 scale; higher score equals (=) better level of functioning or greater degree of symptoms.

Time frame: Predose on Day 1 of each cycle, at the end of treatment and at follow-up, up to 60 months

Population: The study was terminated early secondary to strategic reasons and the questionnaires were discontinued by Protocol Amendment 6. Therefore, the analysis was not performed and an incomplete data set was not reported because it would potentially skew the data, and is not statistically relevant, thus could be misleading.

Secondary

Maximum Plasma Concentration of CP-751,871

Time frame: Predose on Day 1 at Cycles 1, 2, 4, and 5 and 150 days post last dose of CP-751,871 and for salvage therapy, at Day 1 and 150 days post last dose of CP-751,871

Population: The study was terminated early due to strategic reasons and pharmacokinetic (PK) sampling was discontinued by Protocol Amendment 6. Therefore, the analysis was not performed and an incomplete data set was not reported because it would potentially skew the data, and is not statistically relevant, thus could be misleading.

Secondary

Minimum Plasma Concentration of CP-751,871

Time frame: Predose on Day 1 at Cycles 1, 2, 4, and 5 and 150 days post last dose of CP-751,871 and for salvage therapy, at Day 1 and 150 days post last dose of CP-751,871

Population: The study was terminated early due to strategic reasons and PK sampling was discontinued by Protocol Amendment 6. Therefore, the analysis was not performed and an incomplete data set was not reported because it would potentially skew the data, and is not statistically relevant, thus could be misleading.

Secondary

Number of Participants With Negative Human Anti-Human Antibodies (HAHAs)

Negative human anti-human antibodies were defined as \<6.64

Time frame: Predose on Day 1 of Cycle 1 and at 150 days post last CP-751,871 infusion

Population: All randomized participants who started treatment and who had at least 1 sample submitted for the biomarker; collection of samples for this analysis was stopped after Amendment 6. All samples were negative to HAHA.

ArmMeasureValue (NUMBER)
CP-751,871 + ExemestaneNumber of Participants With Negative Human Anti-Human Antibodies (HAHAs)37 participants
Secondary

Percentage of Participants Achieving Complete Response (CR), Partial Response (PR), or Stable Disease (SD) Maintained for at Least 6 Months

Objective responses were defined using RECIST as CR: disappearance of all target and nontarget lesions. PR: at least a 30% decrease in the sum of the longest diameter (LD) of target lesions, taking as a reference the baseline sum LD. Nontarget lesions may persist provided there is no unequivocal progression in these lesions. SD: measurements demonstrating neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify as progressive disease (PD) during the first 6 weeks after the start of treatment taking as reference the smallest sum LD since the treatment started. During this time, nontarget lesions may persist provided there is no unequivocal progression in these lesions.

Time frame: Baseline, Day 1 of Cycles 2 and 4 and then Day 1 of every 3rd cycle starting at Cycle 7 up to 60 months

Population: FAS

ArmMeasureValue (NUMBER)
CP-751,871 + ExemestanePercentage of Participants Achieving Complete Response (CR), Partial Response (PR), or Stable Disease (SD) Maintained for at Least 6 Months68.9 percentage of participants
ExemestanePercentage of Participants Achieving Complete Response (CR), Partial Response (PR), or Stable Disease (SD) Maintained for at Least 6 Months64.1 percentage of participants
p-value: 0.46395% CI: [-8, 17.6]Pearson chi-square test
Secondary

Percentage of Participants With Circulating Tumor Cells Expressing Insulin-Like Growth Factor 1 Receptor (IGF-IR)

Time frame: Predose on Day 1 of Cycle 1

Population: The study was terminated early due to strategic reasons and biomarker sampling was discontinued by Protocol Amendment 6. Therefore, the analysis was not performed and an incomplete data set was not reported because it would potentially skew the data, and is not statistically relevant, thus could be misleading.

Secondary

Percentage of Participants With Serum Markers Relevant to the IGF-1R Pathway

Time frame: Predose on Day 1 of Cycles 1 and 4 and at end of treatment prior to beginning salvage therapy

Population: The study was terminated early due to strategic reasons and biomarker sampling was discontinued by Protocol Amendment 6. Therefore, the analysis was not performed and an incomplete data set was not reported because it would potentially skew the data, and is not statistically relevant, thus could be misleading.

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026