This study is phase II, open label, clinical trial to determine the efficacy of Oregovomab and non-platinum chemotherapy in PARP inhibitor resistant ovarian, fallopian tube, or primary peritoneal cancer patients who were not suitable for platinum retreatment. Patients who have received one to three prior lines of chemotherapy are to be assigned to Cohort 1 (oregovamab 2 mg \[C1,2,3,5,7 for five doses\] + pegylated liposomal doxorubicin \[PLD\] 40 mg/m2 q4w, n=28), while patients who have received more than three prior lines of chemotherapy are to be assigned to Cohort 2 (oregovamab 2 mg \[C1,2,3,5,7 for five doses\] + weekly paclitaxel 80 mg/m2 \[D1,8,15 q4w\], n=28). A total of 56 patients will be recruited and treated with oregovomab + PLD / weekly paclitaxel until disease progression, unacceptable toxicity, or withdrawal of patient consent. The primary endpoint is objective response rate by RECIST 1.1.
This study is a two-cohort, single arm phase II study in patients with PARP inhibitor-resistant ovarian, fallopian tube, or primary peritoneal cancer. The efficacy and safety of five administrations of Oregovomab 2mg IV in combination with non-platinum chemotherapy will be evaluated with recurrent ovarian cancer who have progressed with prior PARP inhibitor treatment. Patients with disease under study will be screened for eligibility during the period 28 days immediately prior to starting study drug on Day 1. Laboratory and radiological assessments performed as part of standard of care before signing informed consent may be used if performed within the screening/baseline time window. During this time, the inclusion and exclusion criteria will be assessed and all screening assessments, laboratory tests, and procedures will be performed. Cohort 1(1-3 prior line of chemotherapy) PLD (40 mg / m2 IV over three hours in one day) to be repeated till progression or unacceptable toxicity every four weeks (28 days) Investigational agent (Oregovomab): 2 mg diluted in 50 mL saline for injection administered IV following PLD over approximately 20 (acceptable range 15-30) minutes for a total of 5 scheduled injections, one each at Cycle 1, Cycle 2, Cycle 3, Cycle 5, and Cycle 7 Cohort2 (\>3prior line of chemotherapy) paclitaxel (80 mg / m2 IV over three hours in one day) to be repeated till progression or unacceptable toxicity every four weeks on day 1, 8, 15 Investigational agent (Oregovomab): 2 mg diluted in 50 mL saline for injection administered IV following paclitaxel over approximately 20 (acceptable range 15-30) minutes for a total of 5 scheduled injections, one each at Cycle 1, Cycle 2, Cycle 3, Cycle 5, and Cycle 7
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
56
PLD (40 mg / m2 IV over three hours in one day) to be repeated till progression or unacceptable toxicity every four weeks (28 days) Investigational agent (Oregovomab): 2 mg diluted in 50 mL saline for injection administered IV following PLD over approximately 20 (acceptable range 15-30) minutes for a total of 5 scheduled injections, one each at Cycle 1, Cycle 2, Cycle 3, Cycle 5, and Cycle 7
paclitaxel (80 mg / m2 IV over three hours in one day) to be repeated till progression or unacceptable toxicity every four weeks on day 1, 8, 15 Investigational agent (Oregovomab): 2 mg diluted in 50 mL saline for injection administered IV following paclitaxel over approximately 20 (acceptable range 15-30) minutes for a total of 5 scheduled injections, one each at Cycle 1, Cycle 2, Cycle 3, Cycle 5, and Cycle 7
Yonsei University Health System, Severance Hospital
Seoul, South Korea
RECRUITINGConfirmed ORR
based on radiographically confirmed response according to CR+PR rate based on RECIST v1.1 as determined by the investigator
Time frame: From date of enrollment until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 24 months
progression-free survival
PFS is calculated as the interval in months from the date of enrollment to the date of disease progression or the date of death, whichever comes first.
Time frame: Up to 1 years
Overall survival (OS)
Overall survival (OS) will be calculated using the date of death OS is calculated as the interval in months from the date of enrollment to the date of death.
Time frame: Up to 1 years
Time to first Subsequent Therapy
TFST, defined as time from the date of enrollment into the study to second anti-cancer therapy start date following study treatment completion, treatment exit \[EOT\] or death, will be determined.
Time frame: The date of first documented first subsequent treatment or date of death, assessed up to 72 months
Time to Second Subsequent Therapy
TSST, defined as time from the date of enrollment into the study to third anti-cancer therapy start date following study treatment completion, treatment exit \[EOT\] or death, will be determined.
Time frame: The date of first documented second subsequent treatment assessed up to 72 months
Duration of response
DOR, defined as the time from the first occurrence of a documented objective response to disease progression or death from any cause (whichever occurs first), as determined by the investigator according to RECIST v1.1
Time frame: Up to 1 years
second objective disease progression
PFS2, defined as the time from enrollment into the study to the earlier date of progression on next-line therapy or death from any cause, will be determined.
Time frame: Up to 1 years
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