TGF-beta signaling in thymic epithelial cells regulates thymic involution and postirradiation reconstitution.

ABSTRACT: The thymus constitutes the primary lymphoid organ responsible for the generation of naive T cells. Its stromal compartment is largely composed of a scaffold of different subsets of epithelial cells that provide soluble and membrane-bound molecules essential for thymocyte maturation and selection. With senescence, a steady decline in the thymic output of T cells has been observed. Numeric and qualitative changes in the stromal compartment of the thymus resulting in reduced thymopoietic capacity have been suggested to account for this physiologic process. The precise cellular and molecular mechanisms underlying thymic senescence are, however, only incompletely understood. Here, we demonstrate that TGF-beta signaling in thymic epithelial cells exerts a direct influence on the cell's capacity

SUBMITTER: Hauri-Hohl MM 

PROVIDER: S-EPMC2481556 | biostudies-literature | 2008 Aug

REPOSITORIES: biostudies-literature