The results shows promising duration of benefit with 19% of patients continuing treatment for more than a year and the longest running patient remaining on treatment for over 2 years, with sustained partial response, states the company.

The patients in the study had disease control on fostrox + Lenvima independent if they benefitted from previous line of therapy, showing potential for all second-line patients to benefit from the combination. The safety and tolerability profile continues to be encouraging with no unexpected adverse events. While hematological adverse events were common, they were temporary in nature. Decreases in neutrophil & platelet counts showed a cyclic pattern with recovery before next cycle of treatment, enabling patients to remain on treatment long-term. Importantly, no patient experienced febrile neutropenia or low platelet count with bleeding and there were no fostrox-related serious adverse events.

“With three patients still remaining on study treatment, all of whom treated for more than a year, this data-set is now quite mature. At a median follow-up of 10.5 months, fostrox + Lenvima have clearly shown promise of improved outcomes beyond current alternatives for second-line liver cancer patients. Fostrox is designed to only target tumor cells locally in the liver, without harming healthy cells. It is therefore reassuring to see the tolerability profile of fostrox enabling the combination of two highly potent treatments, fostrox + Lenvima, without compromising patient safety. Patients were able to stay on treatment long-term, which evidently contributes to the extended duration of benefit and a median time to progression of 10.9 months, substantially longer than previously seen in second-line liver cancer. It is with reinforced confidence we continue our preparations for the initiation of the planned phase 2b study comparing fostrox + Lenvima with Lenvima alone in a randomized setting to confirm the benefit of the combination,” says Dr. Pia Baumann, Chief Medical Officer at Medivir.

The data are from Medivir’s ongoing phase 1b/2a open-label, multi-center, dose-escalation and dose-expansion study, evaluating the safety and efficacy of fostrox in combination with Lenvima in patients for whom current first- or second-line treatment has proven ineffective or is not tolerable.