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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Eur+J+Immunol
2016 ; 46
(4
): 846-56
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Dynamic spatio-temporal contribution of single ?5t+ cortical epithelial
precursors to the thymus medulla
#MMPMID26694097
Mayer CE
; ?uklys S
; Zhanybekova S
; Ohigashi I
; Teh HY
; Sansom SN
; Shikama-Dorn N
; Hafen K
; Macaulay IC
; Deadman ME
; Ponting CP
; Takahama Y
; Holländer GA
Eur J Immunol
2016[Apr]; 46
(4
): 846-56
PMID26694097
show ga
Intrathymic T-cell development is critically dependent on cortical and medullary
thymic epithelial cells (TECs). Both epithelial subsets originate during early
thymus organogenesis from progenitor cells that express the thymoproteasome
subunit ?5t, a typical feature of cortical TECs. Using in vivo lineage fate
mapping, we demonstrate in mice that ?5t(+) TEC progenitors give rise to the
medullary TEC compartment early in life but significantly limit their
contribution once the medulla has completely formed. Lineage-tracing studies at
single cell resolution demonstrate for young mice that the postnatal medulla is
expanded from individual ?5t(+) cortical progenitors located at the
cortico-medullary junction. These results therefore not only define a
developmental window during which the expansion of medulla is efficiently enabled
by progenitors resident in the thymic cortex, but also reveal the spatio-temporal
dynamics that control the growth of the thymic medulla.