Abstract

T cell deficiency after bone marrow transplantation (BMT) leads to significant morbidity and mortality due to infection and malignant relapse. We have previously shown that CD4-CD8- T cell precursors (preT) generated via OP9-DL1 coculture improve thymic and peripheral T cell reconstitution when administered at the time of BMT. While the thymus supports T cell development into old age, adult BMT recipients have limited thymic function due to age-related involution and additional injury caused by transplant conditioning.

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