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Dorn, T.* ; Kuhn, U.* ; Bungartz, G.* ; Stiller, S.* ; Bauer, M.* ; Ellwart, J.W. ; Peters, T.* ; Scharffetter-Kochanek, K.* ; Semmrich, M.* ; Laschinger, M.* ; Holzmann, B.* ; Klinkert, W.E.* ; Straten, P.T.* ; Køllgaard, T.* ; Sixt, M.* ; Brakebusch, C.*

RhoH is important for positive thymocyte selection and T-cell receptor signaling.

Blood 109, 2346-2355 (2007)
Verlagsversion DOI
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
RhoH is a small GTPase expressed only in the hematopoietic system. With the use of mice with targeted disruption of the RhoH gene, we demonstrated that RhoH is crucial for thymocyte maturation during DN3 to DN4 transition and during positive selection. Furthermore, the differentiation and expansion of DN3 and DN4 thymocytes in vitro were severely impaired. These defects corresponded to defective TCR signaling. Although RhoH is not required for TCR-induced activation of ZAP70 and ZAP70-mediated activation of p38, it is crucial for the tyrosine phosphorylation of LAT, PLCgamma1, and Vav1 and for the activation of Erk and calcium influx. These data suggest that RhoH is important for pre-TCR and TCR signaling because it allows the efficient interaction of ZAP70 with the LAT signalosome, thus regulating thymocyte development.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
ISSN (print) / ISBN 0006-4971
e-ISSN 1528-0020
Zeitschrift Blood
Quellenangaben Band: 109, Heft: 6, Seiten: 2346-2355 Artikelnummer: , Supplement: ,
Verlag American Society of Hematology
Begutachtungsstatus Peer reviewed