Oncolytics Biotech® to Showcase New Pancreatic Cancer Data at ASCO Highlighting Pelareorep's Tumor-Fighting Mechanism of Action

ASCO data expected to highlight how pelareorep activates immune responses in pancreatic cancer patients Ongoing updates support potential of pelareorep combination therapies in one of the deadliest and hardest-to-treat cancers , /PRNewswire/ -- Oncolytics Biotech® Inc. (NASDAQ: ONCY) (TSX: ONC), a leading clinical-stage company specializing in immunotherapy for oncology, will present new data from Cohort 1 of the GOBLET study at the 2025 American Society of Clinical Oncology (ASCO) Annual Meeting in Chicago May 30-June 3, 2025 demonstrating pelareorep's anti-tumor activity in pancreatic ductal adenocarcinoma (PDAC) - the most common form of pancreatic cancer characterized by its poor prognosis and limited treatment options. "Pelareorep continues to deliver encouraging results in pancreatic cancer, where few effective treatments exist," said Thomas Heineman, M.D., Ph.D., Chief Medical Officer for Oncolytics Biotech. "In multiple studies, pelareorep has repeatedly demonstrated its ability to engage the immune system to attack pancreatic cancer tumors, which has the potential to improve outcomes for patients battling this difficult-to-treat cancer." Abstract Number: 2562Title: Role of pelareorep in activating anti-tumor immunity in PDAC.Presentation Type: PosterSession Title: Developmental Therapeutics – ImmunotherapySession Date and Time: June 2, 2025, 1:30 - 4:30 p.m. CT Abstracts will be published on the ASCO website at 5:00 p.m. ET on May 22, 2025. About GOBLET The GOBLET (Gastrointestinal tumOrs exploring the treatment comBinations with the oncolytic reovirus peLarEorep and anTi-PD-L1) study is a phase 1/2 multiple indication study in advanced or metastatic gastrointestinal tumors. The study is being conducted at 17 centers in Germany and is being managed by AIO-Studien-gGmbH. The primary endpoints of the study are objective response rate (ORR) and/or disease control rate assessed at week 16 and safety. Key secondary and exploratory endpoints include additional efficacy assessments and evaluation of potential biomarkers. The study comprises five treatment groups: Pelareorep in combination with atezolizumab, gemcitabine, and nab-paclitaxel in 1st line advanced/metastatic pancreatic cancer patients; Pelareorep in combination with atezolizumab in 1st line MSI (microsatellite instability)-high metastatic colorectal cancer patients; Pelareorep in combination with atezolizumab and TAS-102 in 3rd line metastatic colorectal cancer patients Pelareorep in combination with atezolizumab in 2nd line advanced and unresectable anal cancer patients; and Pelareorep in combination with modified FOLFIRINOX with and without atezolizumab in newly diagnosed metastatic PDAC patients. Any cohort meeting pre-specified efficacy criteria in Stage 1 may be advanced to Stage 2 and enroll additional patients. About AIO AIO-Studien-gGmbH (AIO) emerged from the study center of the medical oncology working group within the German Cancer Society (DKG). AIO operates with a non-profit purpose of promoting science and research with a focus on medical oncology. Since its foundation, AIO has become a successful sponsor and study management company and has established itself both nationally and internationally. About Oncolytics Biotech Inc. Oncolytics is a clinical-stage biotechnology company developing pelareorep, an intravenously delivered immunotherapeutic agent. Pelareorep has demonstrated promising results in two randomized Phase 2 studies in metastatic breast cancer and Phase 1 and 2 studies in pancreatic cancer. It acts by inducing anti-cancer immune responses and promotes an inflamed tumor phenotype -- turning "cold" tumors "hot" -- through innate and adaptive immune responses to treat a variety of cancers. Pelareorep has demonstrated synergies with multiple approved oncology treatments. Oncolytics is currently conducting and planning combination clinical trials with pelareorep in solid malignancies as it advances towards registrational studies in metastatic breast cancer and pancreatic cancer, both of which have received Fast Track designation from the FDA. For further information, please visit: www.oncolyticsbiotech.com or follow the company on social media on LinkedIn and on X @oncolytics. Tecentriq® (atezolizumab) is a registered trademark of Genentech, a member of the Roche Group. This press release contains forward-looking statements, within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended and forward-looking information under applicable Canadian securities laws (such forward-looking statements and forward-looking information are collectively referred to herein as "forward-looking statements"). Forward-looking statements contained in this press release include statements regarding Oncolytics' belief as to the potential, mechanism of action and benefits of pelareorep as a cancer therapeutic; our belief that there are multiple clinical and regulatory options for bringing pelareorep to patients; and other statements related to anticipated developments in Oncolytics' business and technologies. In any forward-looking statement in which Oncolytics expresses an expectation or belief as to future results, such expectations or beliefs are expressed in good faith and are believed to have a reasonable basis, but there can be no assurance that the statement or expectation or belief will be achieved. Such forward-looking statements involve known and unknown risks and uncertainties, which could cause Oncolytics' actual results to differ materially from those in the forward-looking statements. Such risks and uncertainties include, among others, the availability of funds and resources to pursue research and development projects, the efficacy of pelareorep as a cancer treatment, the success and timely completion of clinical studies and trials, Oncolytics' ability to successfully commercialize pelareorep, uncertainties related to the research and development of pharmaceuticals, uncertainties related to the regulatory process and general changes to the economic environment. We may incur expenses or delays relating to events outside of our control, which could have a material adverse impact on our business, operating results and financial condition. Investors should consult Oncolytics' quarterly and annual filings with the Canadian and U.S. securities commissions for additional information on risks and uncertainties relating to the forward-looking statements. Investors are cautioned against placing undue reliance on forward-looking statements. The Company does not undertake any obligation to update these forward-looking statements, except as required by applicable laws. Company Contact Jon PattonDirector of IR & Communication[email protected] Investor Relations for Oncolytics Mike MoyerLifeSci Advisors+1-617-308-4306[email protected] Media Contact for Oncolytics Michael RubensteinLifeSci Communications[email protected] Logo - https://mma.prnewswire.com/media/2408622/5284957/Oncolytics_Biotech_Inc_Logo.jpg SOURCE Oncolytics Biotech® Inc. 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Oncolytics Biotech® to Showcase New Pancreatic Cancer Data at ASCO Highlighting Pelareorep's Tumor-Fighting Mechanism of Action

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