Role of the thymus in T cell homeostasis during foetal and postnatal life in sheep
Grant number: 251683
The mature T cell pool can arise from only two sources, either thymic export or expansion of the peripheral T cell pool or a mixture of both. The lifespan of either cell type, i.e. recent thymic emigrants or mature T cells, has considerable implications for the development of a pool of T cells able to respond to a large number of infections. Recent thymic emigrants represent a wide diversity of positively selected thymocytes exhibiting newly arising T cell specificities, but mature T cell pool expansion results in reduced diversity because of a predominant expansion of a limited number of clones. It follows that a mixing of the pool of older mature T cells with new ones just released from th..View full description
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