29 January 2026
Four additional sites open for recruitment in Oncoinvent’s Phase 2 trial
- First patient enrolled in newly activated site
Oslo, Norway, 29 January 2026: Oncoinvent, a clinical stage, radiopharmaceutical company developing innovative treatments for solid cancers, today announces that the first patient has been enrolled at one of the newly activated sites in its Phase 2 study of Radspherin® in patients with peritoneal carcinomatosis from ovarian cancer.
The randomized part of the study has been actively recruiting patients at six sites since March 2025. Four additional sites have now been opened, and the first patient has been enrolled at one of these newly activated sites.
“The process of opening new clinical sites involves extensive regulatory reviews, contracting, and site-readiness work. We are therefore pleased to see both the successful activation of additional sites and the enrollment of the first patient at a newly onboarded site,” said Kari Myren, Chief Medical Officer at Oncoinvent.
The Phase 2 trial (Clinicaltrial.gov: NCT06504147) is a randomized controlled trial assessing the efficacy and safety of Radspherin® in patients with peritoneal metastases from ovarian cancer. The primary objective is to compare progression-free survival (PFS) between patients who receive Radspherin® after complete surgical resection following pre-operative chemotherapy, and patients receiving pre-operative chemotherapy and surgery alone.
The study will recruit patients at a total of 11 sites across Norway (1), Spain (5), Belgium (1), the United Kingdom (2), the United States (1), and Italy (1). Positive Phase 1/2a data from the safety interim analysis demonstrated that Radspherin® was well tolerated with no dose-limiting toxicity observed at the recommended dose of 7MBq.
About Oncoinvent
Oncoinvent is developing Radspherin®, a receptor-independent alpha radiation therapy that leverages the unique anatomy of the abdominal cavity to destroy residual micrometastases using a single, highly localized dose of alpha radiation. The initial clinical focus is treatment of ovarian and colorectal cancer patients after surgical removal of the primary tumor and visible metastases in the peritoneum, the thin membrane lining the abdominal cavity and covering the abdominal organs.
This radiopharmaceutical is designed to prevent or delay recurrence in the peritoneal cavity, keeping patients disease-free for longer than the current standard of care and thereby also impacting overall survival. It is broadly applicable to any cancer that spreads to the peritoneum, e.g. ovarian, colorectal, and gastric cancers. Radspherin® stands out for its simplicity, excellent safety profile, and seamless integration into existing surgical workflows. Oncoinvent’s product is easy to use, avoids systemic delivery and significant toxicity. It is also differentiated in being simple to manufacture, scalable, and supply de-risked.
Data from two trials in ovarian (phase 1) and colorectal (phase 1/2a) cancers, are highly promising, showing an excellent safety profile and meaningful signals of efficacy. Interim data from an ongoing, randomized, controlled phase 2 ovarian cancer trial is expected in 2026. With cost-effective manufacturing, blockbuster potential, active pharma partnership momentum, plus strong endorsements from leading experts, Oncoinvent is built for scale and commercial success, and is set to become the new standard for post-surgical cancer care. The Company was founded by the originators of Algeta and Xofigo (acquired by Bayer).
