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Cell Rep. 2014 Oct 9;9(1):402-15. doi: 10.1016/j.celrep.2014.08.070. Epub 2014 Oct 2.

Global transcriptional profiling reveals distinct functions of thymic stromal subsets and age-related changes during thymic involution.

Author information

  • 1Department of Molecular Biosciences, Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, TX 78712, USA.
  • 2Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, CA 94305, USA.
  • 3Department of Molecular Biosciences, Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, TX 78712, USA. Electronic address: lehrlich@austin.utexas.edu.

Abstract

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 unanticipated 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 proinflammatory genes increases with age in thymic dendritic cells. Many genes previously implicated in late involution are already deregulated by 3-6 months of age. We provide these thymic stromal data sets, along with thymocyte data sets, in a readily searchable web-based platform, as a resource for investigations into thymocyte:stromal interactions and mechanisms of thymic involution.

PMID:
25284794
PMCID:
PMC4194175
DOI:
10.1016/j.celrep.2014.08.070
[PubMed - indexed for MEDLINE]
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