T-Cell Receptor Repertoires Show Dynamic Variation Between Diagnosis and Relapse of Diffuse Large B-Cell Lymphoma
- PMID: 40630397
- PMCID: PMC12236605
- DOI: 10.1002/jha2.70097
T-Cell Receptor Repertoires Show Dynamic Variation Between Diagnosis and Relapse of Diffuse Large B-Cell Lymphoma
Abstract
Background: Tumour infiltrating lymphocyte (TIL) T-cell receptor (TCR) repertoire is prognostic in newly diagnosed diffuse large B-cell lymphoma (DLBCL), but evolution has not been evaluated at relapse.
Methods: We examined the TCR repertoire in nine paired DLBCL samples from diagnosis and relapse.
Results: We noted considerable differences, with dominant clones at diagnosis replaced at relapse by new clones that were absent or minor initially. There was low linearity between diagnostic and relapsed samples (r-values 0.01-0.316), with shared clones averaging 8.3% (range 0%-37%). Clonal diversity was reduced in relapsed samples, suggesting an increasingly defunct intratumoural immune response.
Conclusion: T-cell diversity is reduced in relapsed/refractory DLBCL, which may have implications for immunotherapy usage.
Keywords: DLBCL; T‐cell receptor; diffuse large B cell lymphoma; microenvironment.
© 2025 The Author(s). eJHaem published by British Society for Haematology and John Wiley & Sons Ltd.
Conflict of interest statement
Joel Wight has received honoraria from Johnson & Johnson, AbbVie, Sobi, BeiGene, AstraZeneca and MDI, educational subsidies and consulting fees from AbbVie, and has served on the advisory board for Alexion, Johnson & Johnson, and Roche. Colm Keane is on advisory boards for Karyopharm, Roche, Beigene and BMS and has received research funding from Beigene and MSD. Eliza A. Hawkes: Research funding to institution: Bristol Myers Squibb/Celgene, Merck KgaA, AstraZeneca, and F. Hoffmann‐La Roche. Advisory board: F. Hoffmann‐La Roche,* Antigene,* Bristol Myers Squibb, AstraZeneca, Novartis,* Merck Sharpe Dohme,* and Gilead* (*paid to institution). Speaker engagement: Roche (institution), Astra Zeneca (institution), Janssen, and Regeneron. Consultancy: Specialised therapeutics. Tom Witkowski declares no conflicts of interest.
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