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The activated B cell (ABC) subset of diffuse large B-cell lymphoma (DLBCL) is characterized by chronic B-cell receptor signaling and associated with poor outcomes when treated with standard therapy. In ABC-DLBCL, MALT1 is a core enzyme that is constitutively activated by stimulation of the B-cell receptor or gain-of-function mutations in upstream components of the signaling pathway, making it an attractive therapeutic target. We discovered a novel small-molecule inhibitor, ABBV-MALT1, that potently shuts down B-cell signaling selectively in ABC-DLBCL preclinical models leading to potent cell growth and xenograft inhibition. We also identified a rational combination partner for ABBV-MALT1 in the BCL2 inhibitor, venetoclax, which when combined significantly synergizes to elicit deep and durable responses in preclinical models. This work highlights the potential of ABBV-MALT1 monotherapy and combination with venetoclax as effective treatment options for patients with ABC-DLBCL.
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http://dx.doi.org/10.1158/1535-7163.MCT-23-0518 | DOI Listing |
Eur J Case Rep Intern Med
September 2025
Respiratory Department, University Hospital Limerick, Limerick, Ireland.
Unlabelled: B-cell lymphomas are highly aggressive forms of lymphoma that commonly present with lymphadenopathy, systemic "B" symptoms, or organ involvement making them easy to recognize; however, a small percentage of B-cell lymphomas can present without any typical symptoms or evidence of lymphadenopathy, resulting in delayed recognition and management. Isolated thrombocytopenia without anaemia or leukopenia is an unusual presentation of B cell lymphomas and may be misdiagnosed as immune thrombocytopenia (ITP). Given the rarity of this presentation, we wish to report a case of a 76-year-old female who presented with palpitations, shortness of breath, and recurrent chest infections.
View Article and Find Full Text PDFBlood Cell Ther
August 2025
Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Science, Fukuoka, Japan.
Background: Chimeric antigen receptor T-cell (CAR-T) therapy has transformed the treatment landscape for relapsed or refractory non-Hodgkin lymphoma, achieving a 5-year overall survival rate of 40-50%. However, relapse remains a major challenge, especially due to CD19-negative clones. Epcoritamab, a bispecific antibody targeting CD20 and CD3, offers a potential solution for post-CAR-T relapse; however, clinical data in this setting remain limited, particularly in Japan.
View Article and Find Full Text PDFFront Vet Sci
August 2025
Pathobiology and Population Science, Royal Veterinary College, Hatfield, United Kingdom.
Diffuse large B-cell lymphoma is the most common type of non-Hodgkin lymphoma (NHL) in humans, accounting for about 30-40% of NHL cases worldwide. Canine diffuse large B-cell lymphoma (cDLBCL) is the most common lymphoma subtype in dogs and demonstrates an aggressive biologic behaviour. For tissue biopsies, current confirmatory diagnostic approaches for enlarged lymph nodes rely on expert histopathological assessment, which is time-consuming and requires specialist expertise.
View Article and Find Full Text PDFIndian J Nucl Med
August 2025
Department of Nuclear Medicine, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India.
Diffuse large B-cell lymphoma (DLBCL) is a highly aggressive type of non-Hodgkin lymphoma. Accurate evaluation of treatment response is essential for effective management. This case report discusses the potential role of ⁶⁸Ga-Pentixafor positron emission tomography (PET)/computed tomography (CT) in comparison to F-fluorodeoxyglucose PET/CT for assessing treatment response in a patient with DLBCL.
View Article and Find Full Text PDFAm J Clin Pathol
September 2025
Laboratory for Clinical Genomics and Advanced Technology (CGAT)-Department of Pathology and Laboratory Medicine, Dartmouth Hitchcock Medical Center, Lebanon, NH, United States.
Objective: Differentiating between the repertoire of immunoglobulin rearrangements is important in guiding diagnoses and management of B-cell lymphoma processes. A subset of these disease entities, such as chronic lymphocytic leukemia (CLL) and mantle cell lymphoma (MCL), can show distinct genomic profiles with a shared cell of origin. In this report, we describe a rare case in which differentiating between the immunoglobulin family of rearrangements (IGH, IGK, IGL) with optical genome mapping (OGM) helped revise the clinical suspicion of CLL.
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