A First-in-Human Study of ABBV-525 (MALT1 Inhibitor) in B-Cell Malignancies

Description

B-cell malignancies are a group of cancers of B lymphocytes, a type of white blood cell responsible for fighting infections. The purpose of this study is to assess safety, tolerability, pharmacokinetics and preliminary efficacy of ABBV-525 as a monotherapy. ABBV-525 is an investigational drug being developed for the treatment of B-Cell Malignancies. Study doctors put the participants in groups called treatment arms. Participants will receive ABBV-525 at different doses. Approximately 100 adult participants will be enrolled in the study across sites worldwide. In part 1 (dose escalation), participants will receive escalating oral doses of ABBV-525. In part 2 (dose optimization), participants will receive one of two oral doses of ABBV-525, until the recommended phase 2 dose (RP2D) is determined. In part 3 (dose expansion), participants will receive the RP2D oral dose of ABBV-525. The estimated duration of the study is up to 64 months. There may be higher treatment burden for participa

Trial Eligibility

Inclusion Criteria: * Dose Escalation (Part 1) Only: Participants with a documented diagnosis of one of the following third line or later of treatment (3L)+ mature B-cell malignancies, from the World Health Organization (WHO)-defined histologies as defined in the protocol. * Dose Optimization (Part 2) Only: Participants with documented diagnosis of chronic lymphocytic leukemia (CLL) who are 3L+, +/- cysteine-to-serine point mutation at residue 481 of BTK-domain active site (C481S with histology based on WHO criteria, with measurable disease requiring treatment as defined by the International Workshop on Chronic Lymphocytic Leukemia (iwCLL). * Dose Expansion (Part 3) Only: Participants with documented diagnosis of non-germinal center B cell (GCB) Diffuse large B-cell lymphoma (DLBCL) who are 3L+ chimeric antigen receptor T-cells (CAR-T)/Hematopoietic cell transplant (HCT) relapsed/refractory (R/R) and/or ineligible with histology based on WHO criteria, with measurable disease requiring treatment. * Participant has an Eastern Cooperative Oncology Group (ECOG) Performance Status (PS) of 0 or 1. * Participant has a life expectancy \>= 12 weeks. * Adequate hematological and hepatic function as defined in the protocol. * Must have archival or freshly collected tumor tissue for correlative studies before study enrollment. * Participants with prior central nervous system (CNS) disease that has been effectively treated may be eligible. * Participants with resolved coronavirus disease 2019 (COVID-19) infection are eligible. Exclusion Criteria: * Known active CNS disease, or primary CNS lymphoma. * Known bleeding disorders. * Known history of stroke or intracranial hemorrhage within 12 months prior to first dose of study treatment. * Uncontrolled active systemic infection, or active cytomegalovirus infection. * Active hepatitis B or C infection. * Known history of human immunodeficiency virus (HIV). * Known active COVID-19 infection. Participant must not have signs/symptoms associated with COVID-19 infection or known exposure to a confirmed case of COVID-19 infection during screening. If participant has signs/symptoms suggestive of COVID-19 infection, the participant must have a negative molecular (eg, polymerase chain reaction) test or 3 negative antigen test results at least 24 hours apart.

Study Info

Interventions

Locations Recruiting

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