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An Interim Report on a Phase 1/2 Study of HPN217, a Half-Life Extended Tri-Specific T Cell Activating Construct (TriTAC®) Targeting B Cell Maturation Antigen for the Treatment of Relapsed/Refractory Multiple Myeloma (GWCC - Hall B5, Level 1) - Nov 5, 2021 - Abstract #ASH2021ASH_3235; P1/2 Premedication to minimize cytokine release syndrome (CRS) includes dexamethasone, diphenhydramine, acetaminophen, and a proton pump inhibitor...Patients treated received a median of 8 (range of 4 – 16) prior systemic regimens, including 5 patients who received prior BCMA-targeted belantamab mafodotin or orvacabtagene autoleucel...Dose escalation, including implementation of step dosing, with the goal of establishing an RP2D regimen, is ongoing. NCT04184050
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The Effects of BCMA Expression, Soluble BCMA, and Combination Therapeutics on the Anti-Tumor Activity of HPN217, a BCMA-Targeting Tri-Specific T Cell Engager Against Multiple Myeloma (GWCC - Hall B5, Level 1) - Nov 5, 2021 - Abstract #ASH2021ASH_2744; P1/2 Herein, we describe translational studies to examine factors that may impact the therapeutic efficacy of HPN217, including the target BCMA, in membrane-bound or soluble form, and concomitant or combination therapeutics such as γ-secretase inhibitor (GSI) and dexamethasone...Interestingly, treatment of MM cell line RPMI8226 with the GSI LY-3039478 for 24 hours increased the cell surface expression of BCMA by 3.6 folds...On the other hand, Dex had limited negative effect. HPN217 in combination with approved and experimental MM therapeutics is being evaluated in the 3DTEBM and MM.1S-Luc models.
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[VIRTUAL] HPN217-3001: A Phase 1/2 Open-Label, Multicenter, Dose Escalation and Dose Expansion Study of the Safety, Tolerability, and Pharmacokinetics of HPN217, a Bcma-Targeting T-Cell Engager, in Patients with Relapsed/Refractory Multiple Myeloma (Poster Hall (Virtual Meeting)) - Nov 5, 2020 - Abstract #ASH2020ASH_1207; P1/2 The study will also evaluate overall response rate (ORR) based on IMWG response criteria, progression-free survival (PFS) and overall survival (OS), duration of response (DOR), immunogenicity of HPN217, and other exploratory endpoints related to the mechanism of action of HPN217. (NCT04184050)
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