Philogen S.p.A. announced that the Phase III FIBROSARC trial (NCT04650984) will continue as planned by the protocol. The decision was made by an Independent Data and Safety Monitoring Board (DSMB) following the review of efficacy and safety data in the pre-planned interim analysis. FIBROSARC is a Phase III 1:1 randomized trial (NCT04650984) which studies L19TNF in combination with doxorubicin (Experimental Arm) versus doxorubicin alone (Control Arm) in 118 patients as first-line therapy for advanced or metastatic Soft Tissue Sarcoma (STS).

The primary objective of the study is Progression Free Survival (PFS), with an estimated 45% reduction in the risk of progression in the Experimental Arm (Hazard Ratio 0.55). The pre-planned interim analysis was carried out at 50% of the expected events (i.e., one event corresponds to a disease progression or death) necessary for the primary outcome. The 46 events required to trigger the interim analysis were reached on November 9, 2023, and at the time of this Press Release the study has enrolled 97 out of 118 patients across 24 clinical centers in Germany, Italy, France, Poland, and Spain.

The enrolment of 118 patients is expected to be completed in 2024. L19TNF is also being evaluated in (i) a Phase IIb randomized trial in first-line metastatic Leiomyosarcoma in the United States (NCT03420014), (ii) a Phase II randomized trial in pre-treated advanced or metastatic Soft Tissue Sarcoma in Europe (NCT04733183), (iii) a Phase II randomized trial in Glioblastoma at first progression in Europe (NCT04573192), and (iv) a Phase I/II/IIb trial in newly diagnosed Glioblastoma in Europe (NCT04443010). Philogen is currently launching a new Phase II study in Glioblastoma at first or later progression in the United States, based on the very encouraging preliminary data observed in the European study.

These results have already been published in the journal Science Translational Medicine in 2023 (Look at al. Sci. Trans.

Med. 2023, 15:eadf2281).