Interim late-breaking clinical data validate not-alpha profile of THOR-707 (SAR444245), Sanofi's novel investigational IL-2 Interim late-breaking clinical data validate not-alpha profile of THOR-707 (SAR444245), Sanofi's novel investigational IL-2 Early clinical results are consistent with preclinical studies and suggest THOR-707 (SAR444245) may promote an anti-tumor immune response without alpha-mediated side effects, both alone and in combination with anti-PD-1 THOR-707, a precisely PEGylated, engineered version of IL-2 built on Sanofi's Synthorin technology platform, is being studied in a trial of adults with advanced or metastatic solid tumors PARIS - April 9, 2021 - Interim data from a first-in-human trial evaluating the safety, therapeutic activity and maximum tolerable dose of THOR-707 (SAR444245), a highly differentiated not-alpha interleukin-2 (IL-2) candidate, as a monotherapy and in combination with anti-PD-1, will be presented Saturday, April 10 as a late-breaking poster presentation at the American Association for Cancer Research (AACR) Annual Meeting. The Saturday late-breaking poster session will include additional updated data.