ArticlebioRxiv : the preprint server for biology2025
Genetic and environmental imprints on T cell receptor repertoires as predictors of graft-versus-host disease.
Article in bioRxiv : the preprint server for biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Hematopoietic cell transplantation (HCT) as potentially curative treatment for patients with hematologic malignancies relies on T cells to mediate the potentially curative graft-versus-tumor (GVT) effect, which may be associated with graft-versus-host disease (GVHD), a potentially life-threatening complication. T cells recognize peptides presented by Human Leukocyte Antigen (HLA) molecules. It is commonly believed that matching HLA alleles between donors and recipients ensures similarity in their T cell receptor (TCR) repertoires, thereby reducing the risk of GVHD and graft rejection. However, TCR repertoires are shaped by multiple factors beyond HLA genetics, including sex, age, and immune history. The extent to which genetic variation and past infections influence TCR repertoire composition and GVHD risk remains unclear. Here, we show that while HLA haplotypes contribute to broad TCR repertoire differences, recent viral infections significantly impact TCR composition and influence GVHD risk. Analyzing 401 patients who were uniformly transplanted from healthy HLA-identical sibling HCT donors, we introduced
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