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A Study to Evaluate Rucaparib in Combination With Other Anticancer Agents in Participants With a Solid Tumor (SEASTAR)

SEASTAR: A Phase 1b/2, Open-label, Parallel Arm Study to Assess the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of Oral Rucaparib in Combination With Other Anticancer Agents in Patients With a Solid Tumor

Status
Terminated
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03992131
Enrollment
25
Registered
2019-06-20
Start date
2019-06-28
Completion date
2022-04-22
Last updated
2024-01-16

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

Conditions

Ovarian Cancer, Solid Tumor, Triple-negative Breast Cancer, Urothelial Carcinoma

Brief summary

This is an open label, Phase 1b/2 study with multiple treatment arms evaluating the safety, tolerability, pharmacokinetics (PK), and preliminary efficacy of rucaparib in combination with a second anticancer therapy in participants with an advanced/metastatic solid malignancy (Phase 1b), followed by evaluation of the combination in one or more specific participant populations in an expansion phase (Phase 2 cohorts).

Interventions

DRUGRucaparib

Rucaparib will be administered per schedule specified in the arm description.

Lucitanib will be administered per schedule specified in the arm description.

DRUGSacituzumab govitecan

Sacituzumab govitecan will be administered per schedule specified in the arm description.

Sponsors

Gilead Sciences
CollaboratorINDUSTRY
pharmaand GmbH
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

Phase 1b (all arms): * Solid tumor, advanced or metastatic, progressed on standard treatment participants in Arm B must have either triple negative breast cancer OR urothelial carcinoma OR ovarian cancer OR have a solid tumor with a deleterious mutation in BRCA1, BRCA2, PALB2, RAD51C or RAD51D * Measurable disease per RECIST v1.1 * Adequate organ function * Eastern Cooperative Oncology Group (ECOG) 0 or 1 * Tumor tissue for genomic analysis

Exclusion criteria

Phase 1b (all arms): * Known history of myelodysplastic syndrome (MDS) * Symptomatic and/or untreated central nervous system (CNS) metastases Inclusion Criteria Phase 2 (all arms): * Histologically or cytologically confirmed solid tumor, previously treated and measurable per RECIST v1.1, as follows: * Arm A: ovarian cancer with gBRCAwt disease, either platinum-sensitive OR platinum-resistant * Arm B: Metastatic triple negative breast cancer OR advanced/ metastatic urothelial carcinoma OR relapsed ovarian cancer * At least 1 prior line of standard therapy for advanced disease * Adequate organ function * ECOG 0 or 1 * Tumor tissue for genomic analysis

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants With Objective Response, as Assessed by the Investigator Per Response Evaluation Criteria in Solid Tumors (RECIST) Version (v)1.1 (Phase 2)From the first dose of study drug until the date of documented response to treatment, assessed up to 2 yearsObjective response was defined as a documented and confirmed best overall response of complete response (CR) or partial response (PR) as assessed by the investigator. CR: Disappearance of all target and non-target lesions; any pathological lymph nodes (whether target or nontarget) must have reduction in short axis to \<10 millimeters (mm); and normalization of tumor marker level. PR: At least a 30% decrease in the sum of the longest diameter (LD) of target lesions, taking as reference the baseline sum LD.

Secondary

MeasureTime frameDescription
Duration of Response (DOR) (Phase 2)From the date of first best response to disease progression or death, whichever occurs first, assessed up to 2 yearsDuration of response was measured from the date that best response (CR or PR) was first recorded until the first date that disease progression was documented per RECIST v1.1. CR: Disappearance of all target and non-target lesions; any pathological lymph nodes (whether target or nontarget) must have reduction in short axis to \<10 mm; and normalization of tumor marker level. PR: At least a 30% decrease in the sum of the LD of target lesions, taking as reference the baseline sum LD. Progressive disease: At least a 20% increase in the sum of the LD of target lesions, taking as reference the smallest sum on study (this included the baseline sum if that was the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm. The appearance of one or more new lesions and/or unequivocal progression of existing nontarget lesions was also considered progression.
Progression-free Survival (PFS) (Phase 2)From the first dose of study drug to documented radiographic progression or death, whichever occurs first, assessed up to 2 yearsPFS was measured as the 1+ the number of days from the first dose of study drug to documented radiographic progression, according to RECIST v1.1, as determined by the investigator, or death due to any cause, whichever occurred first. Progressive disease: At least a 20% increase in the sum of the LD of target lesions, taking as reference the smallest sum on study (this included the baseline sum if that was the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm. The appearance of one or more new lesions and/or unequivocal progression of existing nontarget lesions was also considered progression.
Number of Participants With Objective Response, as Assessed by the Investigator Per RECIST v1.1 (Phase 1b)From the first dose of study drug until the date of documented response to treatment, assessed up to 2 yearsObjective response was defined as a documented and confirmed best overall response of CR or PR as assessed by the investigator. CR: Disappearance of all target and non-target lesions; any pathological lymph nodes (whether target or nontarget) must have reduction in short axis to \<10 mm; and normalization of tumor marker level. PR: At least a 30% decrease in the sum of the LD of target lesions, taking as reference the baseline sum LD.

Countries

United States

Participant flow

Pre-assignment details

The study was planned to be conducted in 2 phases: Phase 1b and Phase 2. Enrollment was terminated before Phase 1b was complete, due to Sponsor's decision to discontinue development of the combination of rucaparib and sacituzumab govitecan. Hence, Phase 2 portion of the study was not conducted.

Participants by arm

ArmCount
Arm A1: Rucaparib 300 mg BID and Lucitanib 4 mg QD
Participants received oral rucaparib 300 mg BID and oral lucitanib 4 mg QD continuously in 28-day cycles.
6
Arm A2: Rucaparib 400 mg BID and Lucitanib 4 mg QD
Participants received oral rucaparib 400 mg BID and oral lucitanib 4 mg QD continuously in 28-day cycles.
4
Arm A3: Rucaparib 400 mg BID and Lucitanib 6 mg QD
Participants received oral rucaparib 400 mg BID and oral lucitanib 6 mg QD continuously in 28-day cycles.
3
Arm A4: Rucaparib 600 mg BID and Lucitanib 6 mg QD
Participants received oral rucaparib 600 mg BID and oral lucitanib 6 mg QD continuously in 28-day cycles.
6
Arm B1: Rucaparib 300 mg BID and Sacituzumab Govitecan
Participants received oral rucaparib 300 mg BID, administered continuously, in combination with IV sacituzumab govitecan 6 mg/kg administration on Day 1 and Day 8 of a 21-day cycle.
3
Arm B2: Rucaparib 300 mg QD and Sacituzumab Govitecan
Participants received oral rucaparib 300 mg QD, administered continuously, in combination with IV sacituzumab govitecan 6 mg/kg administration on Day 1 and Day 8 of a 21-day cycle.
3
Total25

Baseline characteristics

CharacteristicArm A1: Rucaparib 300 mg BID and Lucitanib 4 mg QDArm A2: Rucaparib 400 mg BID and Lucitanib 4 mg QDArm A3: Rucaparib 400 mg BID and Lucitanib 6 mg QDArm A4: Rucaparib 600 mg BID and Lucitanib 6 mg QDArm B1: Rucaparib 300 mg BID and Sacituzumab GovitecanArm B2: Rucaparib 300 mg QD and Sacituzumab GovitecanTotal
Age, Categorical
<=18 years
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Age, Categorical
>=65 years
3 Participants1 Participants3 Participants0 Participants0 Participants1 Participants8 Participants
Age, Categorical
Between 18 and 65 years
3 Participants3 Participants0 Participants6 Participants3 Participants2 Participants17 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants0 Participants1 Participants2 Participants0 Participants0 Participants3 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
5 Participants4 Participants2 Participants4 Participants3 Participants3 Participants21 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
1 Participants0 Participants0 Participants0 Participants0 Participants0 Participants1 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants0 Participants1 Participants0 Participants1 Participants
Race (NIH/OMB)
Black or African American
1 Participants1 Participants0 Participants1 Participants0 Participants0 Participants3 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants1 Participants1 Participants0 Participants0 Participants2 Participants
Race (NIH/OMB)
White
5 Participants3 Participants2 Participants4 Participants2 Participants3 Participants19 Participants
Sex: Female, Male
Female
5 Participants2 Participants2 Participants5 Participants2 Participants3 Participants19 Participants
Sex: Female, Male
Male
1 Participants2 Participants1 Participants1 Participants1 Participants0 Participants6 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
EG005
affected / at risk
deaths
Total, all-cause mortality
0 / 60 / 40 / 30 / 60 / 30 / 3
other
Total, other adverse events
6 / 64 / 43 / 36 / 63 / 33 / 3
serious
Total, serious adverse events
3 / 60 / 40 / 32 / 62 / 31 / 3

Outcome results

Primary

Number of Participants With Objective Response, as Assessed by the Investigator Per Response Evaluation Criteria in Solid Tumors (RECIST) Version (v)1.1 (Phase 2)

Objective response was defined as a documented and confirmed best overall response of complete response (CR) or partial response (PR) as assessed by the investigator. CR: Disappearance of all target and non-target lesions; any pathological lymph nodes (whether target or nontarget) must have reduction in short axis to \<10 millimeters (mm); and normalization of tumor marker level. PR: At least a 30% decrease in the sum of the longest diameter (LD) of target lesions, taking as reference the baseline sum LD.

Time frame: From the first dose of study drug until the date of documented response to treatment, assessed up to 2 years

Population: Due to Sponsor's decision to discontinue development of the combination of rucaparib and sacituzumab govitecan, the study was terminated before Phase 1b was complete, and Phase 2 portion of the study was not conducted. Hence, the data for this outcome measure could not be collected and analyzed.

Secondary

Duration of Response (DOR) (Phase 2)

Duration of response was measured from the date that best response (CR or PR) was first recorded until the first date that disease progression was documented per RECIST v1.1. CR: Disappearance of all target and non-target lesions; any pathological lymph nodes (whether target or nontarget) must have reduction in short axis to \<10 mm; and normalization of tumor marker level. PR: At least a 30% decrease in the sum of the LD of target lesions, taking as reference the baseline sum LD. Progressive disease: At least a 20% increase in the sum of the LD of target lesions, taking as reference the smallest sum on study (this included the baseline sum if that was the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm. The appearance of one or more new lesions and/or unequivocal progression of existing nontarget lesions was also considered progression.

Time frame: From the date of first best response to disease progression or death, whichever occurs first, assessed up to 2 years

Population: Due to Sponsor's decision to discontinue development of the combination of rucaparib and sacituzumab govitecan, the study was terminated before Phase 1b was complete, and Phase 2 portion of the study was not conducted. Hence, the data for this outcome measure could not be collected and analyzed.

Secondary

Number of Participants With Objective Response, as Assessed by the Investigator Per RECIST v1.1 (Phase 1b)

Objective response was defined as a documented and confirmed best overall response of CR or PR as assessed by the investigator. CR: Disappearance of all target and non-target lesions; any pathological lymph nodes (whether target or nontarget) must have reduction in short axis to \<10 mm; and normalization of tumor marker level. PR: At least a 30% decrease in the sum of the LD of target lesions, taking as reference the baseline sum LD.

Time frame: From the first dose of study drug until the date of documented response to treatment, assessed up to 2 years

Population: Efficacy population included all participants who had received at least 1 dose of rucaparib or the second study drug and who had measurable disease per RECIST v1.1 at baseline.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Arm A1: Rucaparib 300 mg BID and Lucitanib 4 mg QDNumber of Participants With Objective Response, as Assessed by the Investigator Per RECIST v1.1 (Phase 1b)1 Participants
Arm A2: Rucaparib 400 mg BID and Lucitanib 4 mg QDNumber of Participants With Objective Response, as Assessed by the Investigator Per RECIST v1.1 (Phase 1b)0 Participants
Arm A3: Rucaparib 400 mg BID and Lucitanib 6 mg QDNumber of Participants With Objective Response, as Assessed by the Investigator Per RECIST v1.1 (Phase 1b)0 Participants
Arm A4: Rucaparib 600 mg BID and Lucitanib 6 mg QDNumber of Participants With Objective Response, as Assessed by the Investigator Per RECIST v1.1 (Phase 1b)0 Participants
Arm B1: Rucaparib 300 mg BID and Sacituzumab GovitecanNumber of Participants With Objective Response, as Assessed by the Investigator Per RECIST v1.1 (Phase 1b)1 Participants
Arm B2: Rucaparib 300 mg QD and Sacituzumab GovitecanNumber of Participants With Objective Response, as Assessed by the Investigator Per RECIST v1.1 (Phase 1b)2 Participants
Secondary

Progression-free Survival (PFS) (Phase 2)

PFS was measured as the 1+ the number of days from the first dose of study drug to documented radiographic progression, according to RECIST v1.1, as determined by the investigator, or death due to any cause, whichever occurred first. Progressive disease: At least a 20% increase in the sum of the LD of target lesions, taking as reference the smallest sum on study (this included the baseline sum if that was the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm. The appearance of one or more new lesions and/or unequivocal progression of existing nontarget lesions was also considered progression.

Time frame: From the first dose of study drug to documented radiographic progression or death, whichever occurs first, assessed up to 2 years

Population: Due to Sponsor's decision to discontinue development of the combination of rucaparib and sacituzumab govitecan, the study was terminated before Phase 1b was complete, and Phase 2 portion of the study was not conducted. Hence, the data for this outcome measure could not be collected and analyzed.

Source: ClinicalTrials.gov · Data processed: Feb 15, 2026