New Treatment Modalities Are Reaching Cancers That Resisted Everything Else
Issued on behalf of Oncolytics Biotech Inc.
Leading researchers at the AACR forecast that 2026 will accelerate deployment of smarter delivery systems engineered to function in hostile tumor microenvironments, from armored T cells and off-the-shelf NK platforms to radiopharmaceuticals targeting stromal and receptor-specific biology[3]. That momentum is already visible in the clinic, where several programs are now converting early signals into registration-enabling data.
The designation is based on clinical data showing pelareorep combined with standard chemotherapy and Avastin® achieved a 33% response rate in KRAS-mutant microsatellite-stable (MSS) colorectal cancer patients, compared to roughly 10% with chemotherapy and Avastin®. More importantly, patients lived a median 27 months versus 11.2 months with standard treatment, and their cancer stayed stable for 16.6 months compared to 5.7 months. Response rate measures the percentage of patients whose tumors shrink significantly or disappear.
This matters because KRAS-mutant MSS colorectal cancer represents one of the hardest-to-treat cancer populations, with limited options after first-line treatment fails and minimal benefit from immune therapies. The global market for second-line treatment in this patient group runs between
"Adding pelareorep to the standard-of-care in this underserved segment of colorectal cancer patients results in a doubling or tripling of critical clinical endpoints, including overall survival, progression-free survival, and objective response rate," said
The company plans to launch a controlled study comparing standard-of-care versus standard-of-care plus pelareorep, with the first clinical site activating in March and interim data expected by year-end 2026. This marks pelareorep's second Fast Track Designation in gastrointestinal cancers, following an earlier designation for pancreatic cancer.
Oncolytics is building out its leadership team to handle these expanding programs. The company recently announced two critical hires:
Pelareorep is also showing strong results in anal cancer, where third-line patients achieved a 29% response rate with responses lasting around 17 months in a setting with no FDA-approved treatments. In second-line anal cancer patients, the 30% response rate more than doubled the benchmark for available immunotherapy.
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In other recent industry developments and happenings in the market include:
Novocure (NASDAQ: NVCR) secured FDA approval for Optune Pax, a wearable medical device delivering Tumor Treating Fields, for the treatment of locally advanced pancreatic cancer in combination with gemcitabine and nab-paclitaxel. The approval marks the first new treatment cleared for this patient population in nearly 30 years. In the Phase 3 PANOVA-3 trial, patients receiving Optune Pax achieved a median overall survival of 16.2 months versus 14.2 months for chemotherapy alone, a statistically significant two-month improvement that also extended median time to pain progression by 6.1 months.
"The FDA approval of Optune Pax marks the first new treatment in decades for people living with locally advanced pancreatic cancer," said
The device was well-tolerated with no new safety signals, and one-year survival in the intent-to-treat group reached 68.1% versus 60.2% for chemotherapy alone. Results from PANOVA-3 were published in the
Perspective
"With longer follow-up and a growing body of clinical experience, we continue to see evidence of sustained and deepening anti-tumor activity for VMT-α-NET at the dose level evaluated in Cohort 2, while the favorable tolerability profile is maintained, possibly even at a higher dose," said
Cohort 3 (6.0 mCi) cleared its dose-limiting toxicity assessment, and Perspective has begun treating additional patients at the higher dose. Initial efficacy data are pending for another 23 patients in Cohort 2 and 8 in Cohort 3, with regulatory engagement planned for 2026 to advance toward a registrational trial.
"Our BioShield platform, which combines cell therapy, our IL-15 superagonist, and a monoclonal antibody in an outpatient, chemotherapy-free setting, represents our vision for Immunotherapy 2.0," said
The addition of ANKTIVA, an IL-15 superagonist designed to promote NK and CD8+ T-cell proliferation, aims to enhance CAR-NK cytotoxicity and rituximab-driven antibody-dependent cellular cytotoxicity. Previously published data showed a 78% complete response rate when an IL-15 superagonist was combined with rituximab in patients with relapsed indolent NHL who had failed prior rituximab therapy.
"These SIGMA protocol updates reflect alignment with
A new exploratory cohort for grade 3 IDH1-mutant oligodendroglioma has also been added, with initial data expected in 2027.
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2. https://www.aacr.org/blog/2026/01/06/fda-approvals-in-oncology-october-december-2025/
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