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Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nat+Commun 2013 ; 4 (ä): 2959 Nephropedia Template TP
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Transdifferentiation of parathyroid cells into cervical thymi promotes atypical T cell development #MMPMID24343363
Li J; Liu Z; Xiao S; Manley NR
Nat Commun 2013[]; 4 (ä): 2959 PMID24343363show ga
The thoracic thymus is the primary vertebrate organ for T cell generation. Accessory cervical thymi have also been identified in humans and mice, and shown in mice to be independent functional organs that support T cell development. However, their origin and functional significance remain unclear. Here we show that cervical thymi in mice have two origins: delayed differentiation of endodermal precursors, and transdifferentiation of parathyroid-fated cells. Compared to thoracic thymus, parathyroid-origin cervical thymi (pCT) express low levels of the thymic epithelial cell-specific transcription factor FOXN1. Consequently, pCT form a distinct microenvironment that supports an atypical thymocyte development pathway, generating T cells with unconventional phenotypic characteristics. Our data demonstrate a transdifferentiation origin for a subset of cervical thymi, with specific functional consequences for T cell development.