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Citation Information: JCI Insight. 2018;3(10):e97219. https://doi.org/10.1172/jci.insight.97219.
Abstract
Allogeneic stem cell transplantation (allo-SCT) can cure some patients with hematopoietic malignancy, but this relies on the development of a donor T cell alloreactive immune response. T cell activity in the first 2 weeks after allo-SCT is crucial in determining outcome, despite the clinical effects of the early alloreactive immune response often not appearing until later. However, the effect of the allogeneic environment on T cells is difficult to study at this time point due to the effects of profound lymphopenia. We approached this problem by comparing T cells at week 2 after allograft to T cells from autograft patients. Allograft T cells were present in small numbers but displayed intense proliferation with spontaneous cytokine production. Oligoclonal expansions at week 2 came to represent a substantial fraction of the established T cell pool and were recruited into tissues affected by graft-versus-host disease. Transcriptional analysis uncovered a range of potential targets for immune manipulation, including OX40L, TWEAK, and CD70. These findings reveal that recognition of alloantigen drives naive T cells toward a unique phenotype. Moreover, they demonstrate that early clonal T cell responses are recruited to sites of subsequent tissue damage and provide a range of targets for potential therapeutic immunomodulation.
Authors
Charlotte F. Inman, Suzy A. Eldershaw, Joanne E. Croudace, Nathaniel J. Davies, Archana Sharma-Oates, Tanuja Rai, Hayden Pearce, Mirjana Sirovica, Y.L. Tracey Chan, Kriti Verma, Jianmin Zuo, Sandeep Nagra, Francesca Kinsella, Jane Nunnick, Rasoul Amel-Kashipaz, Charles Craddock, Ram Malladi, Paul Moss
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