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PI3KACT

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Dynamic regulation of Ras signaling a novel way to attenuate PI3K activity in...

Dynamic regulation of Ras signaling a novel way to attenuate PI3K activity in cancer and inflammation Ras genes take a center stage in signal transduction and molecular oncology, where Ras-driven signaling pathways control proliferation, differentiation, cell adhesion, apoptosis, and cell migration. Mutations in RAS are very commo... ver más

31/12/2012

UNIVERSITAT BASEL

172K€

Presupuesto del proyecto: 172K€

Líder del proyecto

UNIVERSITAT BASEL No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2012-12-31 No tenemos la información de la convocatoria

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1 Participantes

UNIVERSITAT BASEL

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Líder del proyecto

UNIVERSITAT BASEL No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 172K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Ras genes take a center stage in signal transduction and molecular oncology, where Ras-driven signaling pathways control proliferation, differentiation, cell adhesion, apoptosis, and cell migration. Mutations in RAS are very common in cancer, and have been found in 20-30% of all human tumors. Moreover, constitutive Ras activation is known to trigger senescence in the absence of second hit mutations (e.g. loss of p53). Interestingly, both processes - cancer progression and oncogene-induced cellular senescence - were shown to be dependent on Ras interaction with phosphoinositide 3-kinase (PI3K), which points to a dominant role of Ras-mediated PI3K activation in proliferative disease. Here we propose to investigate the possibility that Ras/PI3K interactions are dynamically regulated, which is supported by preliminary data: in certain cellular states, post-translational modification of Ras disrupts its binding to PI3K. We aim to elucidate the importance of this process in physiology and disease. We assume that regulated Ras interactions with PI3Kalpha act in cancer progression, while Ras/PI3Kgamma complexes transiently regulate inflammatory processes. Along these lines, we aim to uncover cellular signaling networks that dynamically dissociate Ras from PI3K. When the above mechanism is validated, we plan to study the consequences of the abrogation of Ras/PI3K interactions in in vivo mouse models. These will elucidate if and how PI3K detachment from Ras acts as a a general and central mechanism to balance inflammatory cell recruitment, oncogen-mediated metastasis, proliferation and senescence.

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