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• W2968832829 abstract "In large B-cell lymphoma (LBCL), MYC translocation and MYC/BCL2 or MYC/BCL6 double hit (DH) are associated with poor prognosis, and there is an unmet need for novel treatment targets in this patient group. Treatments targeting the PD-L1/PD-1 pathway are still poorly elucidated in LBCL. PD-L1 expression might predict response to treatment targeting the PD-L1/PD-1 pathway. We therefore investigated the relationship between PD-L1 protein and mRNA expression levels and MYC and DH translocation in LBCL. We detected MYC, BCL2, and BCL6 translocation by fluorescent in situ hybridization in tissue samples from 130 patients randomly selected from two cohorts of patients with LBCL: 49 patients with MYC translocation of whom 36 had DH and 81 without MYC translocation. PD-L1 protein expression was detected by immunohistochemistry (IHC) in tissue samples from 77 patients and PD-L1 mRNA expression by next-generation RNA sequencing (NGS) in another 77 patients. Twenty-four patients overlapped, ie, were analysed with both IHC and NGS. Nonparametric tests were performed to evaluate intergroup differences. PD-L1 protein expression level was significantly lower in patients with MYC (n = 42, median = 3.3%, interquartile range [IQR] 0.0-10.8) or DH translocations (n = 31, median = 3.3%, IQR 0.0-10.0) compared with patients with no MYC (n = 35, median = 16.7%, IQR 3.3-30.0) or no DH translocations (n = 46, 13.3%, IQR 2.5-30.0), P = .004 and P ≤ .001, respectively. PD-L1 mRNA expression was also significantly lower in patients with MYC or DH translocations, P = .001 and P = .006, respectively. Higher PD-L1 protein and mRNA expression levels were associated with non-germinal centre (GC) type compared with germinal centre B-cell (GCB)-type diffuse LBCL (DLBCL), P = .004 and P = .002, respectively. In conclusion, we report an association between low PD-L1 expression and MYC and DH translocation in patients with LBCL. Our findings may indicate that patients with MYC or DH translocation may benefit less from treatment with PD-L1/PD-1-inhibitors compared with patients without these translocations. This should be evaluated in larger, prospective, consecutive trials." @default.
• W2968832829 created "2019-08-22" @default.
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• W2968832829 date "2019-08-25" @default.
• W2968832829 modified "2023-09-26" @default.
• W2968832829 title "PD‐L1 expression is low in large B‐cell lymphoma with MYC or double‐hit translocation" @default.
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• W2968832829 doi "https://doi.org/10.1002/hon.2664" @default.
• W2968832829 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31408531" @default.
• W2968832829 hasPublicationYear "2019" @default.
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