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Ref Type Journal Article
PMID (31685491)
Authors Kahl BS, Hamadani M, Radford J, Carlo-Stella C, Caimi P, Reid E, Feingold JM, Ardeshna KM, Solh M, Heffner LT, Ungar D, He S, Boni J, Havenith K, O'Connor OA
Title A Phase I Study of ADCT-402 (Loncastuximab Tesirine), a Novel Pyrrolobenzodiazepine-Based Antibody-Drug Conjugate, in Relapsed/Refractory B-Cell Non-Hodgkin Lymphoma.
Journal Clinical cancer research : an official journal of the American Association for Cancer Research
Vol 25
Issue 23
Date 2019 Dec 01
URL
Abstract Text ADCT-402 (loncastuximab tesirine) is an antibody-drug conjugate comprising a CD19-targeting antibody and pyrrolobenzodiazepine dimers. A first-in-human study evaluated the safety and preliminary clinical activity of loncastuximab tesirine in patients with B-cell non-Hodgkin lymphoma (NHL).A multicenter, phase I, dose-escalation and dose-expansion study enrolled patients ages ≥18 years with relapsed/refractory (R/R) B-cell NHL. Patients received loncastuximab tesirine every 3 weeks at doses assigned by a 3+3 dose-escalation design. Dose escalation was used to assess the safety and tolerability of loncastuximab tesirine to determine the dose for expansion. Secondary objectives evaluated clinical activity, characterized the pharmacokinetic profile, and evaluated antidrug antibodies.During dose escalation, 88 patients with R/R B-cell NHL were treated with loncastuximab tesirine at doses 15 to 200 μg/kg. Treatment-emergent adverse events (TEAEs) were experienced by 87/88 (98.9%) patients. Most common TEAEs (≥20% of patients) were hematologic abnormalities, fatigue, edema, liver test abnormalities, nausea, rash, and dyspnea. Grade ≥3 TEAEs (≥5% of patients) included hematologic abnormalities, liver test abnormalities, fatigue, and dyspnea. Overall response rate at doses ≥120 μg/kg was 59.4% (41 of 69 patients; 40.6% complete response; 18.8% partial response). Median duration of response, progression-free survival, and overall survival (all doses) were 4.8, 5.5, and 11.6 months, respectively. Drug exposure increased with increasing dose, showing moderate accumulation with multiple doses ≥150 μg/kg. There was no evidence of immunogenicity.Loncastuximab tesirine had promising activity with acceptable safety in this dose-escalation study. A phase II study with initial dosing at 150 μg/kg has been initiated based on these results.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
Unknown unknown B-cell lymphoma not applicable Loncastuximab tesirine Phase I Actionable In a Phase I trial, Loncastuximab tesirine treatment demonstrated safety and preliminary efficacy, resulted in an overall response rate of 59.4% (41/69, 28 complete response, 13 partial response) in patients with relapsed/refractory B-cell non-Hodgkin lymphoma, with median duration of response, progression-free survival, and overall survival of 4.8, 5.5, and 11.6 months, respectively (PMID: 31685491; NCT02669017). 31685491