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Global transcriptional profiling reveals distinct functions of thymic stromal subsets and age-related changes during thymic involution #MMPMID25284794
Ki S; Park D; Selden HJ; Seita J; Chung H; Kim J; Iyer VR; Ehrlich LIR
Cell Rep 2014[Oct]; 9 (1): 402-15 PMID25284794show ga
Age-associated thymic involution results in diminished T cell output and function in aged individuals. However, molecular mediators contributing to the decline in thymic function during early thymic involution remain largely unknown. Here we present transcriptional profiling of purified thymic stromal subsets from mice 1, 3, and 6 months of age, spanning early thymic involution. The data implicate novel biological functions for a subset of thymic epithelial cells. The predominant transcriptional signature of early thymic involution is decreased expression of cell cycle associated genes and E2F3 transcriptional targets in thymic epithelial subsets. Also, expression of pro-inflammatory genes increases with age in thymic dendritic cells. Many genes previously implicated in late involution are already deregulated by 3 to 6 months of age. We provide these thymic stromal datasets, along with thymocyte datasets, in a readily searchable web-based platform, as a resource for investigations into thymocyte: stromal interactions and mechanisms of thymic involution.