SOT101 shows clinical benefit in patients with advanced solid tumors
SOTIO Biotech announced new data from the ongoing Phase 1/1b AURELIO-03 study of SOT101, an IL-15 superagonist, as a monotherapy and in combination with pembrolizumab in patients with advanced/metastatic solid tumors.In a combination of SOT101 with pembrolizumab in the AURELIO-03 study, the majority of the 13 patients with advanced/metastatic solid tumors had clinical benefit, including in checkpoint inhibitor (CPI) refractory patients. In this dose escalation study, investigators to date have observed three confirmed partial responses and four instances of long-lasting stable disease. These patients had a median of two lines of prior therapy (range 1-6). In addition, SOT101 in combination with pembrolizumab was generally well tolerated. Dose escalation in this study is ongoing. A SOT101 monotherapy arm of the study demonstrated encouraging efficacy signals in the 30 patients with advanced/metastatic solid tumors, including in CPI refractory patients. To date, there has been one confirmed clinical and radiological response and confirmed stable disease in four patients. Additionally, one patient had a partial response on SOT101+pembrolizumab combination therapy after experiencing a relapse on SOC101 monotherapy. SOT101 was well tolerated, and the majority of treatment emergent adverse events were Grade 2 or less. Patients in this dose escalation study have had a median of three lines of prior therapy (range 1-9). The recommended Phase 2 dose has been defined at 12 μg/kg and a Phase 2 monotherapy expansion study at this dose is ongoing in selected tumor indications.