Spago Nanomedical AB (publ) announced data from a non-clinical study exploring 177Lu-SN201 in a model for triple-negative breast cancer. In the model, 177Lu-SN201 demonstrates superior anti-tumor effect compared to standard cancer drugs with a low and acceptable level of radiotoxicity observed. Spago Nanomedical's leading candidate drug within the radiopharmaceutical program Tumorad, 177Lu-SN201, is progressing in clinical development.

In parallel to the ongoing phase I/IIa clinical trial in patients with advanced cancer, an extensive non-clinical study is underway to explore 177Lu-SN201 as monotherapy and combination therapy in a 4T1 orthotopic triple-negative breast cancer model. Data from the initial part of the study with 177Lu-SN201 as monotherapy demonstrates statistically significant anti-tumor effect compared to standard cancer drugs including anti PD-1 and anti-CTLA-4 (immune checkpoint inhibitors), Niraparib (PARP-inhibitor), Paclitaxel (taxanes), and Carboplatin (platinum-based chemotherapy). 177Lu-SN201 reduces tumor growth and significantly increases survival rate compared to animals treated with standard cancer drugs.

A low and acceptable level of radiotoxicity was observed based on body weight and general appearance.