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We describe the identification of a previously unrecognized ubiquitin ligase-substrate (FBXO45-GEF-H1) regulatory axis that plays an important role in germinal center formation and pathogenesis of common BCLs. These studies reveal novel insights linking dysregulated ubiquitin-mediated control to exploitable vulnerabilities and novel therapeutic strategies for these cancers.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11962402 | PMC |
http://dx.doi.org/10.1158/2159-8290.CD-24-0442 | DOI Listing |
Hum Pathol
September 2025
Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
We report 35 patients who had a leukemic phase of diffuse large B-cell lymphoma/high-grade B-cell lymphoma with MYC and BCL2 rearrangements, also known as double-hit lymphoma (DHL). There were 23 men and 12 women with a median age of 57 years (range, 29-82). Eight patients had an established DHL diagnosis and later developed a leukemic phase of disease and 27 presented with DHL and a leukemic phase of disease at initial diagnosis.
View Article and Find Full Text PDFInt J Surg Case Rep
August 2025
Department of Urology, The Fourth Affiliated Hospital of Dali University, Chuxiong, Yunnan 675000, China. Electronic address:
Introduction And Importance: Diffuse large B-cell lymphoma (DLBCL) is the most common non-Hodgkin lymphoma, yet primary renal involvement is rare, constituting less than 1 % of renal malignancies. A case of non-germinal center B-cell-like (non-GCB) DLBCL with BCL-6 positivity is particularly unique. Conventionally, BCL-6 is linked to germinal center B-cell-like (GCB) subtypes.
View Article and Find Full Text PDFJCI Insight
September 2025
Institute of Pathology, Department of Laboratory Medicine and Pathology, Lausanne University Hospital and Lausanne University, Lausanne, Switzerland.
The regulation of follicular (F) and germinal center (GC) immune reactivity in human lymph nodes (LNs), particularly during the acute stages of viral infection, remains poorly understood: We have analyzed lung-draining lymph nodes (LD-LNs) from COVID-19 autopsies using multiplex imaging and spatial transcriptomics to examine the immune landscape with respect to follicular immune reactivity. We identified three groups of donors based on the Bcl6 prevalence of their Reactive Follicles (RFs): RF-Bcl6no/low, RF-Bcl6int, and RF-Bcl6high. A distinct B/TFH immune landscape, associated with increased prevalence of proliferating B-cell and TFH-cell subsets, was found in RF-Bcl6high LD-LNs.
View Article and Find Full Text PDFZhonghua Bing Li Xue Za Zhi
September 2025
Department of Pathology, Clinical Oncology School of Fujian Medical University/Fujian Cancer Hospital, Fuzhou 350014, China.
To explore the clinical features, histopathological morphology, and differential diagnosis of lymphoepithelioma-like carcinoma with abnormal expression of follicular dendritic cell markers. From 2020 to 2021, 4 cases of lymphoepithelioma-like carcinoma with abnormal expression of follicular dendritic cell markers diagnosed in Fujian Cancer Hospital (2 cases) and the Second Affiliated Hospital of Fujian Medical University (2 cases) were collected. Different ancillary procedures such as HE, special stains, immunohistochemistry, and in situ hybridization techniques were used to assess the histopathological features and immunophenotypes.
View Article and Find Full Text PDFAm J Respir Crit Care Med
September 2025
University of Iowa Roy J and Lucille A Carver College of Medicine, Iowa City, Iowa, United States;