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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 PLoS+Biol 2018 ; 16 (7): ä Nephropedia Template TP
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The actin remodeling protein cofilin is crucial for thymic ?? but not ?? T-cell development #MMPMID29985916
Seeland I; Xiong Y; Orlik C; Deibel D; Prokosch S; Küblbeck G; Jahraus B; De Stefano D; Moos S; Kurschus FC; Arnold B; Samstag Y
PLoS Biol 2018[Jul]; 16 (7): ä PMID29985916show ga
Cofilin is an essential actin remodeling protein promoting depolymerization and severing of actin filaments. To address the relevance of cofilin for the development and function of T cells in vivo, we generated knock-in mice in which T-cell?specific nonfunctional (nf) cofilin was expressed instead of wild-type (WT) cofilin. Nf cofilin mice lacked peripheral ?? T cells and showed a severe thymus atrophy. This was caused by an early developmental arrest of thymocytes at the double negative (DN) stage. Importantly, even though DN thymocytes expressed the TCR? chain intracellularly, they completely lacked TCR? surface expression. In contrast, nf cofilin mice possessed normal numbers of ?? T cells. Their functionality was confirmed in the ?? T-cell?driven, imiquimod (IMQ)-induced, psoriasis-like murine model. Overall, this study not only highlights the importance of cofilin for early ?? T-cell development but also shows for the first time that an actin-binding protein is differentially involved in ?? versus ?? T-cell development.