A First In Human Multicenter, Open-Label Study to Determine the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of ABBV-319 in B-cell Malignancies
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Study Summary
To assess the safety, tolerability, pharmacokinetics, and preliminary efficacy of ABBV-319 in adult participants in relapsed or refractory (R/R) diffuse large b-cell lymphoma (DLBCL), R/R follicular lymphoma (FL), or R/R CLL. Adverse events will be assessed.
Part 1 aims to determine the RP2D for ABBV-319 following a Bayesian optimal interval design, with a maximum of 2-fold increments that reduce as the dose increases. RP2D will be determined on the basis of all the data collected in Part 1 including safety, tolerability, PK, PD, and efficacy, if available. Part 2 will further evaluate ABBV-319 at the RP2D in 3 separate subtypes of B-cell malignancies – DLBCL, FL, and CLL.
Safety assessments include adverse event monitoring (per National Cancer Institute Common Terminology Criteria for Adverse Events v5.0), physical examinations, vital sign measurements, and clinical laboratory testing. Dose-limiting toxicities will be assessed. PK parameters including maximum observed serum/plasma concentration (Cmax), time to Cmax, terminal plasma elimination half-life, and area under the serum/plasma concentration-time curve will be analyzed using noncompartmental methods for ABBV-319 total antibody, ADC, and unconjugated GRM payload. Antidrug antibodies (ADAs) and neutralizing ADAs may also be determined, as appropriate. Efficacy will be evaluated in terms of response per disease-specific criteria (including International Workshop on Chronic Lymphocytic Leukemia, International Workshop on Waldenstrom’s Macroglobulinemia, and Lugano classification). Duration of response, time to response, progression-free survival, and overall survival will be evaluated per Kaplan-Meier analysis. QT prolongation, PD, and biomarker data will be assessed as changes from baseline and may be summarized for each scheduled postbaseline visit.
- For dose escalation (Part 1) only: Participants with documented diagnosis of B-cell malignancies including those with histology based on criteria established by the World Health Organization (WHO), and measurable disease requiring treatment, as per the protocol.
- For the relapsed or refractory diffuse large b-cell lymphoma (DLBCL), follicular lymphoma (FL), and Chronic lymphocytic leukemia (CLL) dose expansion cohorts (Part 2) only: Participants with documented diagnosis of one of the B-cell malignancies noted in the protocol with histology based on criteria established by the WHO, and measurable disease requiring treatment, as per the protocol.
- Laboratory values meeting the criteria noted in the protocol.
- For participants previously treated with a CD19-targeting therapy (eg, CD19 monoclonal antibody) a core or excision tumor biopsy subsequent to the most recent CD19-targeting therapy must be collected.
- Participant must have measurable disease, as defined by the 2014 Lugano Classification.
- Key eligibility criteria include measurable disease and Eastern Cooperative Oncology Group performance status of 0 or 1. In addition, patients must meet predefined criteria for adrenal, bone marrow, kidney, and liver function, coagulation parameter levels, and hemoglobin A1c levels (dose escalation only) during screening.
- Known active central nervous system (CNS) disease, or primary CNS lymphoma.
- Known active infection or clinically significant uncontrolled conditions as per the protocol.
- Eastern Cooperative Oncology Group (ECOG) performance status >= 2.
Clinical Study Information for Healthcare Providers
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