Harpoon Therapeutics Doses First Patient with HPN328, an Anti-DLL3 T Cell Engager for Treatment of Small Cell Lung Cancer and other DLL3-Associated Tumors
“We are pleased with the rapid progress of our clinical programs, based on our proprietary TriTAC platform, with patient dosing now underway for our fourth product candidate, HPN328, that targets DLL3,” said
“We are excited to participate in this trial of a promising agent that will hopefully benefit patients with small cell lung cancer and other neuroendocrine tumors,” said
“I am excited that Harpoon’s fourth TriTAC drug candidate, HPN328, has advanced into the clinic focusing on SCLC, an aggressive and deadly disease with a significant unmet need, as its initial indication,” said
About the Phase 1/2 Trial for HPN328
HPN328 is a TriTAC that binds to human and non-human primate DLL3, CD3ε, and albumin with similar affinities. The Phase 1/2 trial is an open-label study of HPN328 as monotherapy to assess the safety, tolerability and pharmacokinetics in patients with advanced cancers associated with expression of DLL3. The first part of the trial is designed to determine a dose for additional clinical investigations. The trial plans to enroll patients with SCLC that have relapsed following at least one line of platinum-based chemotherapy. HPN328 will be administered to patients once weekly by intravenous infusion with dose escalation until a therapeutic dose level has been achieved. The primary outcome measure will be to assess safety and tolerability, and to determine a dose for Phase 2.
Following dose escalation, Harpoon may further evaluate the safety and efficacy of HPN328 in additional parallel cohorts. The primary outcome measure will be to determine efficacy for the Phase 2 dose based on the overall response rate as determined by RECIST. For additional information about the trial, please visit clinicaltrials.gov using the identifier NCT04471727.
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Source: Harpoon Therapeutics