Agenus, an immuno-oncology company specializing in immunological agents for cancer and infectious diseases, has been granted Fast Track Designation from the US Food and Drug Administration (FDA) for the investigation of the combination of botensilimab (AGEN1181) and balstilimab (AGEN2034).
The designation is for patients with non-microsatellite instability-high (MSI-H)/deficient mismatch repair (dMMR) metastatic colorectal cancer with no active liver involvement. Patients targeted with this designation are heavily pretreated are resistant or intolerant to a fluoropyrimidine, oxaliplatin, and irinotecan, and who have also received a VEGF inhibitor, an EGFR inhibitor and/or a BRAF inhibitor, if indicated.
The company is conducting a global, randomized Phase 2 trial of botensilimab in combination with balstilimab compared to standard of care in non-microsatellite instability-high (non-MSI-H) colorectal cancer patients.
“We are pleased that the FDA has granted Fast Track designation for the combination of botensilimab with balstilimab in patients with non-MSI-H colorectal cancer, recognizing the high unmet medical need in this population,” said Dr. Steven O’Day, chief medical officer of Agenus.
“The Fast Track designation offers important benefits, including the potential eligibility for a Priority Review, and we will be working with the FDA and all key stakeholders to rapidly advance the botensilimab/balstilimab combination in colorectal cancer as well as other solid tumor indications.”
During the American Society of Clinical Oncology – Gastrointestinal Cancers Symposium in January 2023, Agenus presented positive results from its ongoing clinical trials of the botensilimab/balstilimab combination in patients with non-MSI-H colorectal cancer.
The combination therapy showed an overall response rate of 23% and a 12-month survival rate of 63%, which compares to very limited activity of 1-2% overall response rate and ~25% 12-month survival rate reported for the standard of care. Responses to the botensilimab/balstilimab therapy have been durable, with 69% ongoing at data cut-off, and median overall survival not reached.
