Oncolytics Biotech To Present Two Posters on the Pelareorep-Based GOBLET Study at ESMO 2023

Preliminary updated PDAC data show 6-month overall survival rate of 82%

Results from pelareorep combination in mCRC met the Stage 1 success criteria

SAN DIEGO  and CALGARY, AB, Oct. 16, 2023 /PRNewswire/ -- Oncolytics Biotech Inc. (NASDAQ: ONCY) (TSX: ONC), a clinical-stage immunotherapeutics company focused on oncology, today announced the publication of two abstracts for posters to be presented during the upcoming European Society for Medical Oncology (ESMO) Congress 2023, taking place from October 20^th to 24^th at the IFEMA Madrid Conference Center in Madrid, Spain.

Abstracts Overview

Abstract / Poster Title	Pelareorep (pela) + atezolizumab (atezo) and chemotherapy in first-line (1L) advanced or metastatic pancreatic ductal adenocarcinoma (PDAC) patients – Results from the GOBLET study
Final Publication Number (FPN)	1623P
Poster Date	October 23, 2023

Abstract / Poster Title	Pelareorep + atezolizumab and chemotherapy in third-line (3L) metastatic colorectal cancer (mCRC) patients – Interim results from the GOBLET study
Final Publication Number (FPN)	619P
Poster Date	October 22, 2023

Abstracts Summaries

Abstract 1623P

• The GOBLET Phase 1/2 Simon two-stage basket study was designed to evaluate pelareorep in combination with the PD-L1 inhibitor atezolizumab (atezo) and chemotherapy in patients with different solid tumors. In the first stage of the pancreatic ductal adenocarcinoma (PDAC) cohort, 13 evaluable patients were enrolled (including 92% with metastatic disease, 69% in the liver). Primary objectives were safety and efficacy, measured by Stage 1 success criterion of >3 confirmed responses (PDAC segment). T cell receptor sequencing (TCR-seq) was also performed during the course of treatment.
• Updated data from the study showed that 8 of 13 evaluable patients had a partial response (PR) and 3 had stable disease (SD) for an objective response rate (ORR) of 62% (53% confirmed with two scans) and a clinical benefit rate (CBR) of 85%. As of the data cut-off (January 19, 2023), the median duration of response was 6.0 months, the 6-month progression-free survival (PFS) rate was 72.9%, and the 6-month overall survival (OS) rate was 82.1%. T cell receptor sequencing (TCR-seq) showed an expansion of new and pre-existing T-cell clones. No safety signals were observed. Updated efficacy and TCR-seq results will be presented at ESMO; final PFS and OS are pending.
• The authors concluded from these data that the combination of pelareorep, atezo and chemotherapy was well-tolerated and that the ORR exceeded the pre-specified success criterion. The authors also noted that these data compare favorably with ORRs from prior first-line PDAC trials.

Abstract 619P