On January 22, 2025 Oncolytics Biotech Inc. (NASDAQ: ONCY) (TSX: ONC), a leading clinical-stage company specializing in immunotherapy for oncology, reported details from the abstracts featuring pelareorep that are being presented at the 2025 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Gastrointestinal Cancers Symposium in San Francisco January 23-25, 2025 (Press release, Oncolytics Biotech, JAN 22, 2025, View Source [SID1234649827]).
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Thomas Heineman, M.D., Ph.D., Chief Medical Officer for Oncolytics Biotech, commented, "The posters that will be presented at the symposium later this week continue to show pelareorep’s compelling potential in gastrointestinal cancers. In relapsed anal cancer, the efficacy signal that was initially reported continues to outperform historical control trials with the inclusion of additional patients. Importantly, the complete response we observed previously continued beyond the 12 months initially reported. Together, these results point to a clinically meaningful synergy between pelareorep and checkpoint inhibitors like atezolizumab. In pancreatic cancer, pelareorep previously demonstrated a strong efficacy signal when administered with gemcitabine, nab-paclitaxel and atezolizumab. Our new safety data indicate its ability to also be combined with modified FOLFIRINOX, thus expanding its potential to benefit patients with metastatic pancreatic cancer. We will continue to provide updates on the safety and efficacy of pelareorep-based combination therapy from these cohorts as they become available."
"I am quite pleased by these recent updates from the GOBLET study as they continue to provide potential new treatment options for patients in need of alternatives while maintaining a manageable safety profile," said Dirk Arnold, M.D., Ph.D., Director of Asklepios Tumorzentrum Hamburg, and primary investigator of the GOBLET trial. "I’ve been especially impressed with the ability of pelareorep-based therapies to work across multiple challenging cancer indications and with multiple standards of care, including chemotherapy and checkpoint inhibitors, so I look forward to additional data readouts that can help improve the treatment paradigm."
Abstract Number: 6
Title: GOBLET platform study: Preliminary safety and tumor response results for the relapsed anal carcinoma cohort in patients treated with pelareorep and atezolizumab.
Presentation Type: Poster
Session Title: Poster Session C: Cancers of the Colon, Rectum, and Anus
Session Date and Time: January 25, 2025, 7:00 – 7:55 a.m. PT
The fourth cohort of the GOBLET study is evaluating pelareorep combined with the checkpoint inhibitor atezolizumab in patients with second-line or later unresectable squamous cell carcinoma of the anal canal (SCCA). The treatment combination met the pre-defined efficacy success criteria for Stage 1 of its Simon two-stage design, and Stage 2 enrollment of 18 additional evaluable patients has begun. Updated results from this cohort show that four of twelve evaluable patients achieved a partial response for an objective response rate of 33%. This includes one patient with a prolonged complete response that persisted for over 15 months. This is notable because historical response rates to checkpoint inhibitor monotherapy are low, generally 10-24%1-3. There continue to be no safety concerns with the treatment regimen. At treatment cycle four, tumor-infiltrating lymphocyte (TIL) clonal expansion has been observed in the three responding patients for which data is available. It is anticipated that the additional data from Stage 2 of this cohort will provide a sufficiently strong efficacy signal to move this treatment regimen into a registration-enabling study.
Abstract Number: 730
Title: GOBLET study: Results of the safety run-in for first-line metastatic pancreatic ductal adenocarcinoma (PDAC) patients treated with pelareorep + modified FOLFIRINOX +/- atezolizumab.
Presentation Type: Poster
Session Title: Poster Session B: Cancers of the Pancreas, Small Bowel, and Hepatobiliary Tract
Session Date and Time: January 24, 2025, 11:30 a.m. – 1:00 p.m. PT
A promising efficacy signal in metastatic pancreatic ductal adenocarcinoma (PDAC) was previously observed for the combination of pelareorep, gemcitabine, nab-paclitaxel, and atezolizumab. To expand the potential of pelareorep to benefit PDAC patients, and after discussion with key opinion leaders, a cohort was added to the GOBLET study to evaluate pelareorep combined with modified FOLFIRINOX (mFOLFIRINOX) both with and without atezolizumab. This cohort is being funded by a US$5 million grant from the Pancreatic Cancer Action Network (PanCAN). The three-patient safety run-in for each treatment arm has completed enrollment, and patients have completed the necessary evaluation period. The safety data have been reviewed by the Data Safety Monitoring Board (DSMB) and Paul Ehrlich Institute (PEI), Germany’s medical regulatory body, and they have recommended patient enrollment continue without modification.
Abstracts from the ASCO (Free ASCO Whitepaper) Gastrointestinal Cancers Symposium are currently available on the event website, which can be accessed by clicking here.
References
1.Rao S, et al. Phase II study of retifanlimab in patients (pts) with squamous carcinoma of the anal canal (SCAC) who progressed following platinum-based chemotherapy. Annals of Oncology. 2020 September. doi: View Source
2.Marabelle A, et al. Pembrolizumab for previously treated advanced anal squamous cell carcinoma: results from the non-randomised, multicohort, multicentre, phase 2 KEYNOTE-158 study. Lancet Gastroenterol Hepatol. 2022 May;7(5):446-454. doi: 10.1016/S2468-1253(21)00382-4.
3.Lonardi S, et al. Randomized phase II trial of avelumab alone or in combination with cetuximab for patients with previously treated, locally advanced, or metastatic squamous cell anal carcinoma: the CARACAS study. J Immunother Cancer. 2021 November;9(11):e002996. doi: 10.1136/jitc-2021-002996. PMID: 34815354; PMCID: PMC8611452.
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 co-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:
1.Pelareorep in combination with atezolizumab, gemcitabine, and nab-paclitaxel in 1st line advanced/metastatic pancreatic cancer patients;
2.Pelareorep in combination with atezolizumab in 1st line MSI (microsatellite instability)-high metastatic colorectal cancer patients;
3.Pelareorep in combination with atezolizumab and TAS-102 in 3rd line metastatic colorectal cancer patients
4.Pelareorep in combination with atezolizumab in 2nd line advanced and unresectable anal cancer patients; and
5.Pelareorep in combination with mFOLFIRINOX 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.