Eberhard Karls Universität Tübingen
Universitätsklinikum
IMIT - Interfakultäres Institut für Mikrobiologie und Infektionsmedizin
Elfriede-Aulhorn-Str. 6
72076 Tübingen
Tel.: 07071/29-82351
Fax: 07071/29-5440
E-mail: ingo.autenriethspam prevention@med.uni-tuebingen.de, filipp.oesterhelt@uni-tuebingen.de
Ph.D. Students:
Kristina Klein, M.Sc.: kristina.kleinspam prevention@med.uni-tuebingen.de 07071 29-81525
Michael Sonnabend (née Vollmer), M.Sc.: Michael.Vollmerspam prevention@med.uni-tuebingen.de 07071 29-81525
Zusammenfassung
Das aktuelle Paradigma postuliert, dass Yersinia enterocolitica (Ye) Invasin (Inv) direkt und Yersinia Adhäsin A (YadA) indirekt via extracelluläre Matrixproteine an 1 Integrine, die einzig bisher bekann-ten Wirtszellrezeptoren, die von Ye ausgenutzt werden, bindet. Wir wollen bisher unbekannte Wirts-zellrezeptoren, die die Adhäsion und Yop Injektion in Leukozyten in vivo vermitteln, identifizieren sowie die Kräfte definieren, die eine Adhäsion und Yop Injektion zur Folge haben. Hierzu werden transgene Integrin-Null Mäuse und Zellinien, in denen die definierten Rezeptoren ausgeschaltet oder überexprimiert sind, hergestellt und mit Ye Wildtyp bzw. Mutanten getestet. Mittels atomic force Mikroskopie and Flusskammerexperimenten sollen quantitative Eigenschaften der Ye-Wirtszell-Interaktion, die eine Yop Injektion zur Folge haben, definiert werden.
Summary
According to the current paradigm Yersinia enterocolitica (Ye) invasin (Inv) binds directly and the Yer-sinia adhesin A (YadA) indirectly via extracellular matrix (ECM) proteins to 1 integrins, the as yet only recognized host cell receptor exploited by Ye. We will identify the unknown host cell receptor(s) promoting Ye adhesion and Yop injection into leukocytes in vivo, and to define forces and molecular events in adhesion required for promoting Yop injection. To this end transgenic integrin null mice and cell lines lacking or overexpressing the novel receptors will be generated and explored with Ye wild-type and mutant strains. By using atomic force microscopy and flow chamber experiments, we will define quantitative properties of Ye-host cell interactions resulting in Yop injection.
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