BREASTCANCERWNTDDR

Mechanisms underlying Wnt-induced DNA Damage Response in primary human breast epithelial cells

Coordinatore	ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE    more  Organization address address: BATIMENT CE 3316 STATION 1 city: LAUSANNE postcode: 1015 contact info Titolo: Prof. Nome: Cathrin Cognome: Brisken Email: send email Telefono: +41 21 692 5851 Fax: +41 21 652 6933
Nazionalità Coordinatore	Switzerland [CH]
Totale costo	180˙431 €
EC contributo	180˙431 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-2007-4-2-IIF
Funding Scheme	MC-IIF
Anno di inizio	2008
Periodo (anno-mese-giorno)	2008-12-01   -   2010-11-30

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE  Organization address address: BATIMENT CE 3316 STATION 1 city: LAUSANNE postcode: 1015 contact info Titolo: Prof. Nome: Cathrin Cognome: Brisken Email: send email Telefono: +41 21 692 5851 Fax: +41 21 652 6933	CH (LAUSANNE)	coordinator	0.00

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 Obiettivo del progetto (Objective)

'Wnt signaling is important in many developmental processes and has been implicated in tumorigenesis and in degenerative diseases. In normal cells, Wnt family proteins act through the well characterized canonical or less well understood non-canonical signaling pathways. While the canonical pathways proceed through the stabilization of beta-catenin, the non-canonical ones involve several effectors including protein kinases such as JNK, a member of the Stress Activated Protein Kinases family, which is activated by a variety of extracellular stimuli (Weston et al.). The Brisken laboratory has recently shown that increased Wnt signaling in primary human breast epithelial cells (HBECs) triggers a cascade of events resulting in oncogenic conversion of these cells (Ayyanan, A., et al). They found that an early event triggered by ectopic Wnt-1 expression is the activation of the DNA Damage Response (DDR). A hallmark of DDR is the phosphorylation state of the histone H2AX since phosphorylation of H2AX is induced in response to DSBs (double stranded breaks) originating from diverse origins including external damage (E.P. Rogakou et al.; T.T. Paull et al.), replication fork collision (T. Furuta, et al.; I.M. Ward et al.), apoptosis (E.P. Rogakou, et al.), and dysfunctional telomeres (F. d’Adda di Fagagna et al.;.H. Takai et al.). Recently, it has been shown that H2AX could be phosphorylated by JNK. The goal of this project is to determine which signaling cascades are activated by Wnt-1 in primary HBECs, and to test the hypothesis that activation of JNK leads to phosphorylation of H2AX thereby triggering the DDR. This will help to uncover the nature of molecular mechanisms activated by Wnt that could be targets of molecular or pharmacological therapies to breast cancers where Wnt signaling plays a role.'