Abstract 4344
Background
CV301 is an MVA-based vaccine encoding human transgenes MUC1, CEA and TRICOM. A phase I dose-escalation trial (Gatti-Mays E, et al. CCR 2019) concluded that CV301 is safe in advanced cancer patients and generated specific T cell responses against the encoded antigens. Preclinical data supports the rational for combining CV301 with PD-1 inhibitors. The primary objective of this trial was to evaluate safety and tolerability of this combination.
Methods
Patients with advanced non-squamous-NSCLC without actionable alterations in EGFR, ALK and ROS1 were eligible. Two priming doses of MVA-BN-CV301 (MVA) were administered in 4 separate subcutaneous (SC) injections of 4x10^8 IU, 4 weeks apart, followed by boosting doses of Fowlpox-CV301 (FPV) given as a single injection of 1x10^9 IU SC q2w for weeks 9-15, q4w for weeks 19-51 and q13w up to 17 doses for Cohort 1 (C1), q3w for weeks 7-22, q6w for weeks 28-52 and q12w up to 15 doses for Cohort 2 (C2). C1 included patients pre-treated with platinum-containing chemotherapy, who were considered eligible for nivolumab (N; 240 mg IV q2w). C2 included patients receiving frontline treatment with pembrolizumab (P; 200 mg IV q3w) after a minimum of 11 weeks of SD per RECIST.
Results
Between Oct-2017 and Sep-2018, 12 pts were recruited, 4 in C1 and 8 in C2. Median age was 64, and 9 pts were F. Majority of patients were former-smokers (9, 1 current, 2 never). As of Mar-2019 data cut-off, mean treatment duration was 272 days in C1 and 193 days in C2, with 7 pts continuing and 5 discontinuing treatment. Both doses of MVA were administered to 3/4 pts in C1 and 7/8 pts in C2. Median FPV doses/pt: C1=12 and C2=6. CV301 injection-site reactions and flu-like symptoms were observed in all C1 and 7/8 C2 pts. CTCAE ≥ grade 3 AEs were observed in 3/4 C1 and 3/8 C2 pts with 1 fatal TEAE. IRAEs included 1 autoimmune hepatitis, and 1 pneumonitis fulfilling criteria of DLT. As of data-cut, we observed 1 CR (C1), 10 SD, and 1 discontinuation prior to first scheduled RECIST assessment.
Conclusions
The treatment of NSCLC with CV301 + N or P is feasible and tolerated, with no observed increase in the frequency or severity of expected AEs or IRAEs for each component of the combination.
Clinical trial identification
NCT02840994.
Editorial acknowledgement
Legal entity responsible for the study
Bavarian Nordic Inc.
Funding
Bavarian Nordic Inc.
Disclosure
C. Heery: Honoraria (self), Leadership role: Bavarian Nordic. C. Pico-Navarro: Honoraria (self): Bavarian Nordic. M. Piechatzek: Full / Part-time employment: Bavarian Nordic. E. Wagner: Full / Part-time employment: Bavarian Nordic. E. Menius: Full / Part-time employment: Bavarian Nordic. All other authors have declared no conflicts of interest.
Resources from the same session
5655 - Bioactivation of napabucasin triggers reactive oxygen species–mediated cancer cell death
Presenter: Fieke Froeling
Session: Poster Display session 3
Resources:
Abstract
4097 - Targeting NRG1-fusions in multiple tumour types: Afatinib as a novel potential treatment option
Presenter: Stephen V Liu
Session: Poster Display session 3
Resources:
Abstract
1129 - Aspirin and Ticagrelor for the prevention of tumour cell induced platelet aggregation
Presenter: Meera Chauhan
Session: Poster Display session 3
Resources:
Abstract
4514 - Pharmacokinetic/ pharmacodynamic (PK/PD) exposure-response characterization of GSK3359609 (GSK609) from INDUCE-1, a phase I open-label study
Presenter: Michele Maio
Session: Poster Display session 3
Resources:
Abstract
5169 - In vitro functional interrogation of viable Circulating Tumor Associated Cells (C-TACs) for evaluating Platin resistance.
Presenter: Stefan Schuster
Session: Poster Display session 3
Resources:
Abstract
5827 - Targeting ARG2 as a novel therapeutic approach for cancer
Presenter: Marcin Grzybowski
Session: Poster Display session 3
Resources:
Abstract
3129 - MPS1 and PLK1 as new therapy targets in TP53 mutated solid tumors
Presenter: Balazs Gyorffy
Session: Poster Display session 3
Resources:
Abstract
2129 - The Tumor Static Exposure (TSE) concept & utility: application to combination treatment of radiation and radiosensitizing agent in tumor xenograft experiments
Presenter: Samer El Bawab
Session: Poster Display session 3
Resources:
Abstract
1814 - General Methodology to Optimize Tumor Treating Fields Delivery Utilizing Numerical Simulations
Presenter: Noa Urman
Session: Poster Display session 3
Resources:
Abstract
3010 - The Australian Exceptional Responders Program: a National collaboration
Presenter: Megan Barnet
Session: Poster Display session 3
Resources:
Abstract