Background:
Disruption of the immune checkpoint PD-1/PD-L1 pathway yielded clinical activity in
subsets of advanced solid tumors, such as melanoma and lung cancer.
Olaparib (O), a PARP inhibitor (PARPi), has demonstrated single agent activity in
recurrent ovarian cancer (OvCa), and subsets of prostate, triple negative breast or lung
cancers.
Our recent randomized phase 2 study showed that O and cediranib (C), a VEGFR1-3 inhibitor
was clinically superior to O alone in platinum-sensitive recurrent OvCa.
We hypothesize that increased DNA damage by PARP inhibition and/or reduced angiogenesis
by VEGFR inhibition will complement the anti-tumor activity of an immune checkpoint
inhibitor, Durvalumab, in recurrent OvCa and other solid tumors.
Objectives:
Phase I: To determine the recommended phase II dose (RP2D) and the safety of doublet
therapies (Durvalumab/olaparib [Durvalumab+O] and Durvalumab/cediranib [Durvalumab+C])
and triplet therapy (Durvalumab+O+C) in patients with advanced solid tumors.
Phase II Cohort 2 non-small cell lung cancer (NSCLC); Durvalumab+O and Durvalumab+C arms:
To determine clinical efficacy as measured by progression-free survival (PFS)
Phase II Cohort 3 small cell lung cancer (SCLC); Durvalumab+O arm: To determine clinical
efficacy as measured by ORR
Phase II Cohort 4 metasttaic castrate-resistant prostate cancer (mCRPC); Durvalumab+O
arm: To determine clinical efficacy as measured by PFS
Phase II Cohort 5 triple negative breast cancer (TNBC); Durvalumab+O arm: To determine
clinical efficacy as measured by ORR
Phase II Cohort 1 OvCa; Durvalumab+O, Durvalumab+C and Durvalumab+O+C arms: To determine
clinical efficacy as measured by overall response rate (ORR)
Phase II Cohort 6 colorectal cancer (CRC): C+Durvalumab arm: To determine clinical
efficacy as measured by PFS
Eligibility:
Phase I: Advanced or recurrent solid tumors with evaluable disease.
Phase II Cohort 1 Durvalumab+O, Durvalumab+C and Durvalumab+O+C arms: Advanced or
recurrent OvCa
Phase II Cohort 2 Durvalumab+O and Durvalumab+C arms: Advanced or recurrent NSCLC
Phase II Cohort 3 Durvalumab+O arm: Advanced or recurrent SCLC
Phase II Cohort 4 Durvalumab+O arm: mCRPC
Phase II Cohort 5 Durvalumab+O arm: Advanced or recurrent TNBC
Phase II Cohort 6 C+Durvalumab arm: Advanced or recurrent CRC
Patients must be off prior chemotherapy, radiation therapy or biologic therapy for at
least 3 weeks. mCPRC patients (Cohort 4) may be on hormonal therapy with GnRH
agonists/antagonists.
Adults with ECOG performance status 0-2, and adequate organ and marrow function.
Design:
Phase I: Durvalumab+O, Durvalumab+C and Durvalumab+O+C will dose escalate simultaneously.
Durvalumab will be administered once every 2 weeks or once every 4 weeks until disease
progression. O tablets and C will be given orally on a continuous or intermittent dosing
schedule. The DLT period will be one cycle, 28 days. Patients on the 2-week schedule
greater than one year will be changed to the 4-week schedule until progression.
Durvalumab+O: Durvalumab (3 mg/kg or 10 mg/kg IV every 2 weeks, or a fixed dose of 1500
mg every 4 weeks) and O tablets (150 mg or 200 mg or 300 mg BID)
Durvalumab+C: Durvalumab (3 mg/kg or 10 mg/kg IV every 2 weeks, or a fixed dose of 1500
mg every 4 weeks) and C (15 mg or 20 mg or 30 mg daily or 5 days/week)
Durvalumab+O+C: Durvalumab (a fixed dose of 1500mg every 4 weeks) with O tablets (200 mg
or 300 mg BID) and C (15 mg or 20 mg 5 days/week)
Phase II Cohort 1 OvCa Durvalumab+O arm: Patients will be treated with Durvalumab+O at
RP2D (O 300mg tablets bid daily and Durvalumab at 1500 mg IV every 4 weeks).
Phase II Cohort 1 OvCa Durvalumab+C arm: Patients will be treated with Durvalumab+C at
RP2D (C 20mg once a day [5 days on/2 days off] and Durvalumab at 1500 mg every 4 weeks).
Phase II Cohort 1 OvCa Durvalumab+O+C arm: Patients with OvCa (Cohort 1) will be treated
with RP2D (O tablets 300mg BID, C 20mg once a day [5 days on/2 days off] and Durvalumab
at 1500 mg every 4 weeks).
Phase II Cohort 2 NSCLC; Durvalumab+O arm: Patients will be treated with Durvalumab+O at
RP2D (O 300mg tablets bid daily and Durvalumab at 1500 mg IV every 4 weeks).
Phase II Cohort 2 NSCLC; Durvalumab+C arm: Patients will be treated with Durvalumab+C at
RP2D (C 20mg once a day [5 days on/2 days off] and Durvalumab at 1500 mg every 4 weeks).
Phase II Cohort 3 SCLC; Durvalumab+O arm: Patients will be treated with Durvalumab+O at
RP2D (O 300mg tablets bid daily and Durvalumab at 1500 mg IV every 4 weeks).
Phase II Cohort 4 mCRPC; Durvalumab+O arm: Patients will be treated with Durvalumab+O at
RP2D (O 300mg tablets bid daily and Durvalumab at 1500 mg IV every 4 weeks).
Phase II Cohort 5 TNBC; Durvalumab+O arm: Patients will be treated with Durvalumab+O at
RP2D (O 300mg tablets bid daily and Durvalumab at 1500 mg IV every 4 weeks).
Phase II Cohort 6 CRC; C+Durvalumab arm: Patients in the Cohort 6 will be treated with C
20mg daily alone for 14 days followed by the combination at RP2D (C 20mg once a day [5
days on/2 days off] and Durvalumab at 1500 mg every 4 weeks).
Phase II Correlative studies: Research samples including whole blood, CTCs, cell free DNA
and plasma will be obtained at pretreatment, prior to cycle 1 day 15, prior to cycle 3
day 1 and at progression. Mandatory baseline core biopsy and two optional biopsies will
be obtained.
Patients will be evaluated for toxicity every 4 weeks by CTCAEv4.0, and for response
every two cycles (8 weeks) by RECIST 1.1. Patients with mCRPC (Durvalumab+O Cohort 4)
will be evaluated for response initially at 8 weeks then every 12 weeks using RECIST v1.1
criteria as per the Prostate Cancer Clinical Trials Working Group 2 (PCWG2).