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Assessment of Efficacy of AZD2281 in Platinum Sensitive Relapsed Serous Ovarian Cancer

Phase II Randomised, Double Blind, Multicentre Study to Assess the Efficacy of AZD2281 in the Treatment of Patients With Platinum Sensitive Relapsed Serous Ovarian Cancer Following Treatment With Two or More Platinum Containing Regimens

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00753545
Enrollment
265
Registered
2008-09-16
Start date
2008-08-28
Completion date
2023-10-12
Last updated
2025-02-03

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

Conditions

Ovarian Cancer

Keywords

Serous,, Ovarian cancer,, PARP,, BRCA1,, BRCA2,, Poly(ADP ribose) polymerases,, Platinum sensitive,, Homologous Recombination Deficiency (HRD)

Brief summary

The primary purpose of this study to determine if AZD2281 is effective and well tolerated in maintaining the improvement in your cancer after previous platinum-based chemotherapy

Interventions

Tablets Oral BID

DRUGmatching placebo

matching placebo bid

Sponsors

AstraZeneca
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 130 Years
Healthy volunteers
No

Inclusion criteria

* Female patients with histologically diagnosed serous ovarian cancer or recurrent serous ovarian cancer. * Patients must have completed at least 2 previous courses of platinum containing therapy; the patient must have been platinum sensitive to the penultimate chemo regimen. * For the last chemotherapy course prior to enrolment on the study, patients must have demonstrated an objective stable maintained response (partial or complete response) and this response needs to be maintained until completion of chemotherapy. * Patients must be treated on the study within 8 wks of completion of their final dose of the platinum containing regimen.

Exclusion criteria

* Previous treatment with PARP inhibitors including AZD2281 * Patients with low grade ovarian carcinoma. * Patients who have had drainage of their ascites during the final 2 cycles of their last chemotherapy regimen prior to enrolment on the study * Patients receiving any chemotherapy, radiotherapy (except for palliative reasons), within 2 weeks from the last dose prior to study entry (or a longer period depending on the defined characteristics of the agents used).

Design outcomes

Primary

MeasureTime frameDescription
Progression Free Survival (PFS) (According to Response Evaluation Criteria in Solid Tumours [RECIST])Radiologic scans performed at baseline then every 12 weeks (+/- 1 week) for the first 60 weeks, then every 24 weeks (+/-1 week) thereafter, assessed maximum up to 14 months.PFS was defined as the time from randomisation to the earlier date of radiological progression (per RECIST criteria) or death by any cause in the absence of objective progression. \[Full analysis set (FAS)\]

Secondary

MeasureTime frameDescription
Objective Response Rate (ORR) (According to RECIST)Radiologic scans performed at baseline then every 12 weeks (+/- 1 week) for the first 60 weeks, then every 24 weeks (+/-1 week) thereafter, assessed maximum up to 14 months.For each treatment group, the ORR was the number of Complete Response (CR) and Partial Response (PR) divided by the number of patients in the group in the FAS with measurable disease at baseline (displayed as a percentage below). Evaluable for response set
Disease Control RateAssessed at 24 weeks. Radiologic scans performed at baseline, week 12 (+/- 1 week) and week 24 (+/- 1 week).Disease control rate was defined as the percentage of patients who have at least 1 confirmed visit response of CR or PR or have demonstrated SD or NED for at least 23 weeks (ie, 24 weeks +/- 1 week) prior to any evidence of progression. \[FAS\]
Duration of ResponseRadiologic scans performed at baseline then every 12 weeks (+/- 1 week) for the first 60 weeks, then every 24 weeks (+/-1 week) thereafter, assessed maximum up to 14 months.Duration of response = time from assessment prior to timepoint where PR or CR confirmed (i.e. initial assessment of PR/CR), until earliest date of objective progression or death. \[Responding patients only\]. There were insufficient responses to enable conclusions to be drawn.
Percentage Change From Baseline in Tumour Size at Week 24Radiologic scans performed at baseline then every 12 weeks (+/- 1week) for the first 60 weeks, then every 24 weeks (+/-1 week) thereafter, assessed maximum up to 14 months.Percentage change from baseline to Week 24 in target tumour size.
Best Percentage Change in Cancer Antigen 125 (CA-125) LevelsCA-125 was measured at baseline then every 28 days on treatment, assessed maximum up to 14 months.Best percentage change from baseline in CA-125 level
Best Objective ResponseRadiologic scans performed at baseline then every 12 weeks (+/- 1week) for the first 60 weeks, then every 24 weeks (+/- 1 week) thereafter, assessed maximum up to 14 months.Best overall response from radiologic assessments. \[FAS\]
RECIST and CA-125 Response Separately and CombinedRadiologic scans performed at baseline then every 12 weeks (+/- 1week) for the first 60 weeks, then every 24 weeks (+/- 1 week) thereafter and monthly for CA-125 measurements, assessed maximum up to 14 months.RECIST and CA-125 response separately and combined \[Patients evaluable for either CA-125 response or RECIST response\]
Overall Survival (OS)Follow up every 12 weeks post progression, assessed maximum up to 90 months.OS = time from randomisation to date of death from any cause. Patients who had not died at time of analysis were censored at last date patient was known to be alive.
Improvement Rate for FACT-O Symptom Index (FOSI)Patient reported outcome questionnaire completed at baseline then every 28 days up to disease progression, assessed maximum up to 14 months.The percentage of patients with an improvement in FOSI. Improvement was defined as a change from baseline of greater than or equal to +3. \[Evaluable for FOSI set\]
Improvement Rate for Trial Outcome Index (TOI)Patient reported outcome questionnaire completed at baseline then every 28 days up to disease progression, assessed maximum up to 14 months.The percentage of patients with an improvement in TOI. Improvement was defined as a change from baseline of greater than or equal to +7. \[Evaluable for TOI set\]
Improvement Rate for Total Functional Analysis of Cancer Therapy - Ovarian (FACT-O)Patient reported outcome questionnaire completed at baseline then every 28 days up to disease progression, assessed maximum up to 14 months.The percentage of patients with an improvement in total FACT-O. Improvement was defined as a change from baseline of greater than or equal to +9. \[Evaluable for FACT-O set\]
FACT-O Symptom Index (FOSI) Time to WorseningPatient reported outcome questionnaire completed at baseline then every 28 days up to disease progression, assessed maximum up to 14 months.The time to worsening was compared between treatments for each of the TOI, FOSI and total FACT-O. \[Evaluable for FOSI set\]
Trial Outcome Index(TOI)Time to WorseningPatient reported outcome questionnaire completed at baseline then every 28 days up to disease progression, assessed maximum up to 14 months.The time to worsening was compared between treatments for each of the TOI, FOSI and total FACT-O. \[Evaluable for TOI set\]
Functional Analysis of Cancer Therapy - Ovarian (FACT-O) Time to WorseningPatient reported outcome questionnaire completed at baseline then every 28 days up to disease progression, assessed maximum up to 14 months.The time to worsening was compared between treatments for each of the TOI, FOSI and total FACT-O. \[Evaluable for FACT-O set\]
Time to Earlier of CA-125 or RECIST ProgressionRadiologic scans performed at baseline then every 12 weeks (+/- 1 week) for the first 60 weeks, then every 24 weeks (+/- 1 week) thereafter and monthly for CA-125 measurements, assessed maximum up to 14 months.Time from randomisation to the earlier date of radiological progression (per RECIST criteria) or CA-125 or death by any cause in the absence of objective progression. \[FAS\]

Countries

Australia, Austria, Belgium, Canada, Czechia, Estonia, France, Germany, Israel, Netherlands, Poland, Romania, Russia, Spain, Ukraine, United Kingdom, United States

Participant flow

Recruitment details

The first patient was enrolled on 28 August 2008 and the last patient was enrolled on 9 February 2010. Patients were enrolled at 82 centres in 16 countries. Of the 326 patients enrolled, 265 were randomized

Pre-assignment details

It was planned that 250 women with advanced platinum sensitive serous ovarian cancer who had received 2 or more previous platinum-containing regimens and demonstrated an objective stable maintained response in the last platinum regimen prior to enrolment were to receive olaparib 400 mg bd or matching placebo in a 1:1 ratio. 265 randomised.

Participants by arm

ArmCount
Olaparib 400 mg bd
AZD2281 olaparib (AZD2281) 400 mg oral capsules twice daily
136
Placebo bd
olaparib matching placebo oral capsules twice daily
129
Total265

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyDeath98112
Overall StudyLost to Follow-up23
Overall StudyProtocol Violation10
Overall StudyVoluntary Discontinuation of Patient73

Baseline characteristics

CharacteristicPlacebo bdTotalOlaparib 400 mg bd
Age, Continuous58.5 years
STANDARD_DEVIATION 9.89
58.7 years
STANDARD_DEVIATION 10.43
58.9 years
STANDARD_DEVIATION 10.95
Objective response
Complete response
63 Participants120 Participants57 Participants
Objective response
Partial response
66 Participants145 Participants79 Participants
Sex: Female, Male
Female
129 Participants265 Participants136 Participants
Sex: Female, Male
Male
0 Participants0 Participants0 Participants
Time to progression
>12 months
75 participants158 participants83 participants
Time to progression
>6 to 12 months
54 participants107 participants53 participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
— / —— / —
other
Total, other adverse events
129 / 136111 / 128
serious
Total, serious adverse events
31 / 13611 / 128

Outcome results

Primary

Progression Free Survival (PFS) (According to Response Evaluation Criteria in Solid Tumours [RECIST])

PFS was defined as the time from randomisation to the earlier date of radiological progression (per RECIST criteria) or death by any cause in the absence of objective progression. \[Full analysis set (FAS)\]

Time frame: Radiologic scans performed at baseline then every 12 weeks (+/- 1 week) for the first 60 weeks, then every 24 weeks (+/-1 week) thereafter, assessed maximum up to 14 months.

ArmMeasureValue (MEDIAN)
Olaparib 400 mg bdProgression Free Survival (PFS) (According to Response Evaluation Criteria in Solid Tumours [RECIST])8.4 Months
Placebo bdProgression Free Survival (PFS) (According to Response Evaluation Criteria in Solid Tumours [RECIST])4.8 Months
Comparison: HR \< 1 favours olaparibp-value: <0.0000195% CI: [0.25, 0.49]Regression, Cox
Secondary

Best Objective Response

Best overall response from radiologic assessments. \[FAS\]

Time frame: Radiologic scans performed at baseline then every 12 weeks (+/- 1week) for the first 60 weeks, then every 24 weeks (+/- 1 week) thereafter, assessed maximum up to 14 months.

ArmMeasureGroupValue (NUMBER)
Olaparib 400 mg bdBest Objective ResponseComplete Response0 Participants
Olaparib 400 mg bdBest Objective ResponsePartial Response7 Participants
Olaparib 400 mg bdBest Objective ResponseNo evidence of disease49 Participants
Olaparib 400 mg bdBest Objective ResponseStable Disease >= 11 weeks46 Participants
Olaparib 400 mg bdBest Objective ResponseDisease Progression24 Participants
Olaparib 400 mg bdBest Objective ResponseNot Evaluable10 Participants
Placebo bdBest Objective ResponseDisease Progression55 Participants
Placebo bdBest Objective ResponseComplete Response0 Participants
Placebo bdBest Objective ResponseStable Disease >= 11 weeks25 Participants
Placebo bdBest Objective ResponsePartial Response2 Participants
Placebo bdBest Objective ResponseNot Evaluable5 Participants
Placebo bdBest Objective ResponseNo evidence of disease42 Participants
Secondary

Best Percentage Change in Cancer Antigen 125 (CA-125) Levels

Best percentage change from baseline in CA-125 level

Time frame: CA-125 was measured at baseline then every 28 days on treatment, assessed maximum up to 14 months.

Population: A subset of the FAS with baseline and at least 1 follow-up value of CA-125

ArmMeasureValue (MEDIAN)
Olaparib 400 mg bdBest Percentage Change in Cancer Antigen 125 (CA-125) Levels-16.67 percentage of change
Placebo bdBest Percentage Change in Cancer Antigen 125 (CA-125) Levels0.00 percentage of change
Secondary

Disease Control Rate

Disease control rate was defined as the percentage of patients who have at least 1 confirmed visit response of CR or PR or have demonstrated SD or NED for at least 23 weeks (ie, 24 weeks +/- 1 week) prior to any evidence of progression. \[FAS\]

Time frame: Assessed at 24 weeks. Radiologic scans performed at baseline, week 12 (+/- 1 week) and week 24 (+/- 1 week).

ArmMeasureValue (NUMBER)
Olaparib 400 mg bdDisease Control Rate53.7 percentage of participants
Placebo bdDisease Control Rate25.6 percentage of participants
Secondary

Duration of Response

Duration of response = time from assessment prior to timepoint where PR or CR confirmed (i.e. initial assessment of PR/CR), until earliest date of objective progression or death. \[Responding patients only\]. There were insufficient responses to enable conclusions to be drawn.

Time frame: Radiologic scans performed at baseline then every 12 weeks (+/- 1 week) for the first 60 weeks, then every 24 weeks (+/-1 week) thereafter, assessed maximum up to 14 months.

ArmMeasureValue (MEDIAN)
Olaparib 400 mg bdDuration of Response4.2 Months
Placebo bdDuration of Response2.3 Months
Secondary

FACT-O Symptom Index (FOSI) Time to Worsening

The time to worsening was compared between treatments for each of the TOI, FOSI and total FACT-O. \[Evaluable for FOSI set\]

Time frame: Patient reported outcome questionnaire completed at baseline then every 28 days up to disease progression, assessed maximum up to 14 months.

ArmMeasureValue (MEDIAN)
Olaparib 400 mg bdFACT-O Symptom Index (FOSI) Time to Worsening2.8 Months
Placebo bdFACT-O Symptom Index (FOSI) Time to Worsening3.7 Months
Comparison: HR \< 1 favours olaparibp-value: 0.2295% CI: [0.88, 1.71]Regression, Cox
Secondary

Functional Analysis of Cancer Therapy - Ovarian (FACT-O) Time to Worsening

The time to worsening was compared between treatments for each of the TOI, FOSI and total FACT-O. \[Evaluable for FACT-O set\]

Time frame: Patient reported outcome questionnaire completed at baseline then every 28 days up to disease progression, assessed maximum up to 14 months.

ArmMeasureValue (MEDIAN)
Olaparib 400 mg bdFunctional Analysis of Cancer Therapy - Ovarian (FACT-O) Time to Worsening2.8 Months
Placebo bdFunctional Analysis of Cancer Therapy - Ovarian (FACT-O) Time to Worsening4.6 Months
Comparison: HR \< 1 favours olaparibp-value: 0.3895% CI: [0.83, 1.64]Regression, Cox
Secondary

Improvement Rate for FACT-O Symptom Index (FOSI)

The percentage of patients with an improvement in FOSI. Improvement was defined as a change from baseline of greater than or equal to +3. \[Evaluable for FOSI set\]

Time frame: Patient reported outcome questionnaire completed at baseline then every 28 days up to disease progression, assessed maximum up to 14 months.

Population: Evaluable for FOSI set - A subset of the full analysis set which includes patients who have evaluable QoL/Symptom Endpoints at baseline

ArmMeasureValue (NUMBER)
Olaparib 400 mg bdImprovement Rate for FACT-O Symptom Index (FOSI)17.1 percentage of evaluable participants
Placebo bdImprovement Rate for FACT-O Symptom Index (FOSI)14.8 percentage of evaluable participants
Secondary

Improvement Rate for Total Functional Analysis of Cancer Therapy - Ovarian (FACT-O)

The percentage of patients with an improvement in total FACT-O. Improvement was defined as a change from baseline of greater than or equal to +9. \[Evaluable for FACT-O set\]

Time frame: Patient reported outcome questionnaire completed at baseline then every 28 days up to disease progression, assessed maximum up to 14 months.

Population: Evaluable for Total Fact-O set - A subset of the full analysis set which includes patients who have evaluable QoL/Symptom Endpoints at baseline

ArmMeasureValue (NUMBER)
Olaparib 400 mg bdImprovement Rate for Total Functional Analysis of Cancer Therapy - Ovarian (FACT-O)21.1 percentage of evaluable participants
Placebo bdImprovement Rate for Total Functional Analysis of Cancer Therapy - Ovarian (FACT-O)18.9 percentage of evaluable participants
Secondary

Improvement Rate for Trial Outcome Index (TOI)

The percentage of patients with an improvement in TOI. Improvement was defined as a change from baseline of greater than or equal to +7. \[Evaluable for TOI set\]

Time frame: Patient reported outcome questionnaire completed at baseline then every 28 days up to disease progression, assessed maximum up to 14 months.

Population: Evaluable for TOI - a subset of the full analysis set which includes patients who have evaluable QoL/Symptom Endpoints at baseline

ArmMeasureValue (NUMBER)
Olaparib 400 mg bdImprovement Rate for Trial Outcome Index (TOI)20.0 percentage of evaluable participants
Placebo bdImprovement Rate for Trial Outcome Index (TOI)18.0 percentage of evaluable participants
Secondary

Objective Response Rate (ORR) (According to RECIST)

For each treatment group, the ORR was the number of Complete Response (CR) and Partial Response (PR) divided by the number of patients in the group in the FAS with measurable disease at baseline (displayed as a percentage below). Evaluable for response set

Time frame: Radiologic scans performed at baseline then every 12 weeks (+/- 1 week) for the first 60 weeks, then every 24 weeks (+/-1 week) thereafter, assessed maximum up to 14 months.

Population: Evaluable for response set - A subset of the full analysis set which includes patients with measurable disease at baseline

ArmMeasureValue (NUMBER)
Olaparib 400 mg bdObjective Response Rate (ORR) (According to RECIST)12.3 percentage of participants
Placebo bdObjective Response Rate (ORR) (According to RECIST)4.2 percentage of participants
Secondary

Overall Survival (OS)

OS = time from randomisation to date of death from any cause. Patients who had not died at time of analysis were censored at last date patient was known to be alive.

Time frame: Follow up every 12 weeks post progression, assessed maximum up to 90 months.

ArmMeasureValue (MEDIAN)
Olaparib 400 mg bdOverall Survival (OS)29.8 Months
Placebo bdOverall Survival (OS)27.8 Months
Comparison: HR \< 1 favours olaparibp-value: 0.0295% CI: [0.55, 0.95]Regression, Cox
Secondary

Percentage Change From Baseline in Tumour Size at Week 24

Percentage change from baseline to Week 24 in target tumour size.

Time frame: Radiologic scans performed at baseline then every 12 weeks (+/- 1week) for the first 60 weeks, then every 24 weeks (+/-1 week) thereafter, assessed maximum up to 14 months.

Population: Evaluable for response set - A subset of the full analysis set which includes patients with measurable disease at baseline.

ArmMeasureValue (LEAST_SQUARES_MEAN)
Olaparib 400 mg bdPercentage Change From Baseline in Tumour Size at Week 24-0.8 Percent change in tumour size
Placebo bdPercentage Change From Baseline in Tumour Size at Week 2426.4 Percent change in tumour size
Comparison: LS mean \< 0 favours olaparibp-value: 0.0318595% CI: [-51.9, -2.4]ANCOVA
Secondary

RECIST and CA-125 Response Separately and Combined

RECIST and CA-125 response separately and combined \[Patients evaluable for either CA-125 response or RECIST response\]

Time frame: Radiologic scans performed at baseline then every 12 weeks (+/- 1week) for the first 60 weeks, then every 24 weeks (+/- 1 week) thereafter and monthly for CA-125 measurements, assessed maximum up to 14 months.

ArmMeasureGroupValue (NUMBER)
Olaparib 400 mg bdRECIST and CA-125 Response Separately and CombinedConfirmed RECIST Response7 Participants
Olaparib 400 mg bdRECIST and CA-125 Response Separately and CombinedCA-125 Response1 Participants
Olaparib 400 mg bdRECIST and CA-125 Response Separately and CombinedUnconfirmed RECIST response9 Participants
Olaparib 400 mg bdRECIST and CA-125 Response Separately and CombinedConfirmed RECIST or CA-125 Response8 Participants
Olaparib 400 mg bdRECIST and CA-125 Response Separately and CombinedRECIST Response16 Participants
Placebo bdRECIST and CA-125 Response Separately and CombinedConfirmed RECIST or CA-125 Response3 Participants
Placebo bdRECIST and CA-125 Response Separately and CombinedRECIST Response2 Participants
Placebo bdRECIST and CA-125 Response Separately and CombinedConfirmed RECIST Response2 Participants
Placebo bdRECIST and CA-125 Response Separately and CombinedUnconfirmed RECIST response0 Participants
Placebo bdRECIST and CA-125 Response Separately and CombinedCA-125 Response1 Participants
Secondary

Time to Earlier of CA-125 or RECIST Progression

Time from randomisation to the earlier date of radiological progression (per RECIST criteria) or CA-125 or death by any cause in the absence of objective progression. \[FAS\]

Time frame: Radiologic scans performed at baseline then every 12 weeks (+/- 1 week) for the first 60 weeks, then every 24 weeks (+/- 1 week) thereafter and monthly for CA-125 measurements, assessed maximum up to 14 months.

ArmMeasureValue (MEDIAN)
Olaparib 400 mg bdTime to Earlier of CA-125 or RECIST Progression8.3 Months
Placebo bdTime to Earlier of CA-125 or RECIST Progression3.7 Months
Comparison: HR \< 1 favours olaparibp-value: <0.0000195% CI: [0.25, 0.47]Regression, Cox
Secondary

Trial Outcome Index(TOI)Time to Worsening

The time to worsening was compared between treatments for each of the TOI, FOSI and total FACT-O. \[Evaluable for TOI set\]

Time frame: Patient reported outcome questionnaire completed at baseline then every 28 days up to disease progression, assessed maximum up to 14 months.

ArmMeasureValue (MEDIAN)
Olaparib 400 mg bdTrial Outcome Index(TOI)Time to Worsening3.8 Months
Placebo bdTrial Outcome Index(TOI)Time to Worsening4.6 Months
Comparison: HR \< 1 favours olaparibp-value: 0.6795% CI: [0.75, 1.56]Regression, Cox

Source: ClinicalTrials.gov · Data processed: Mar 26, 2026