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- W337154532 abstract "B-cell receptor (BCR) signaling is crucial for the survival of normal and neoplastic B cells, and inhibitors targeting BCR signaling pathways have shown promising therapeutic outcomes for patients with B-cell lymphomas. In the current study, we analyzed de novo diffuse large B-cell lymphoma without BCR expression (DLBCL, BCR) in 25 cases to determine the BCR/phosphatidylinositol-3-kinase/AKT (BCR/PI3K/AKT) signaling status, clinicopathologic features, and underlying causes leading to the loss of BCR. On the basis of clinical features, 15 (60%) DLBCL, BCR patients were classified into the low-risk group, and 18 (86%) experienced complete remission. Morphologically and immunophenotypically, DLBCL, BCR demonstrated centroblastic cytology (21/25, 84%) and germinal center B-cell-like cell origin (18/25, 72%). Other components in BCR complexity remained intact, on the basis of immunohistochemical findings. Epstein-Barr virus infection, deficiency in B-lineage transcription factors (PAX5, Oct-2, and Bob.1), and oncogene rearrangement did not seem to be associated with BCR loss. The activated form of signaling proteins (pSYK and pAKT) involved in the BCR/PI3K/AKT pathway were expressed at low levels in DLBCL, BCR tissue. In vitro validation revealed that in DLBCL, BCR cell lines, the BCR/PI3K/AKT pathway did not respond to BCR stimulation or inhibition. Our findings suggest that DLBCL, BCR was characterized by a silent BCR/PI3K/AKT pathway, germinal center phenotype, and low risk and may not be a candidate for BCR-targeted therapies." @default.
- W337154532 created "2016-06-24" @default.
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- W337154532 date "2015-07-01" @default.
- W337154532 modified "2023-09-25" @default.
- W337154532 title "Loss of B-cell Receptor Expression Defines a Subset of Diffuse Large B-cell Lymphoma Characterized by Silent BCR/PI3K/AKT Signaling and a Germinal Center Phenotype Displaying Low-risk Clinicopathologic Features" @default.
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- W337154532 doi "https://doi.org/10.1097/pas.0000000000000396" @default.
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