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2014 ; 9
(1
): 402-415
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English Wikipedia
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
): 402-415
PMID25284794
show 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
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.