Clinical Benefit Not Proven with Lilly’s Lartruvo
Eli Lilly says results from ANNOUNCE, a Phase 3 study of Lartruvo (olaratumab), in combination with doxorubicin in patients with advanced or metastatic soft tissue sarcoma (STS), did not confirm the therapy’s clinical benefit, which is a requirement for a product to demonstrate post approval under FDA’s accelerated approval program. Lartruvo, a platelet-derived growth factor (PDGF) receptor-alpha blocking antibody, was granted accelerated approval 10/2016.
“When stimulated, PDGF receptors cause tumor growth. Lartruvo works by blocking these receptors, which may help slow or stop tumor growth,” FDA said at the time of approval.
Lilly says the study “did not meet the primary endpoints of overall survival (OS) in the full study population or in the leiomyosarcoma (LMS) sub-population; there was no difference in survival between the study arms for either population.” It plans to present the ANNOUNCE data at an upcoming medical conference and will publish the results in a medical journal.
Because ANNOUNCE did not confirm clinical benefit, Lilly says it will work with global regulators to determine the appropriate next steps. “While these discussions are ongoing, patients who are currently receiving Lartruvo may, in consultation with their physician, continue their course of therapy if they are receiving clinical benefit,” it says. “For patients who have not previously received Lartruvo, the results of the Phase 3 trial do not support initiating treatment with Lartruvo in patients with STS, outside of participation in a clinical trial. At this time, Lilly is suspending promotion of Lartruvo.”