Positive interim results announced for TRPH-222 in patients with NHL

On May 18, 2020, positive interim results were announced from the multi-center, open-label, phase I study of TRPH-222 (NCT03682796). This trial investigated the efficacy and safety of the next-generation antibody-drug conjugate, TRPH-222, in heavily pre-treated patients with relapsed and/or refractory B-cell lymphoma (non-Hodgkin lymphoma; NHL).  The primary aim was to determine the maximum tolerated dose of TRPH-222; the secondary aims were to assess the safety, anti-tumor activity, and the pharmacokinetics. ^{1, 2}

Data from the trial demonstrated early signs of a potential therapeutic benefit in the dose-escalation stage. Of the 19 heavily pretreated patients with NHL, five patients achieved a complete response at doses of 0.6 – 4.2 mg/kg every 3 weeks. Tumor reductions were seen in patients with both indolent and aggressive disease. Patients with follicular, diffuse large cell, and mantle cell lymphoma maintained a durable response. TRPH-222 was well-tolerated with a benign safety profile. The trial is currently ongoing with dose level of 10 mg/kg every 3 weeks. ^{1, 2}