08.09.2015 Views

La néoangiogenèse tumorale

VEGF - FMC de Tours

VEGF - FMC de Tours

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Régulation<br />

• pO2<br />

– mRNA du VEGF<br />

– Rôle essentiel de HIF-1 (hypoxemia inducible factor 1) et de VHL<br />

• Facteurs de croissance et oncogènes<br />

– Up-régulation par des facteurs de croissance (autocrine et paracrine ?)<br />

• EGF (epidermal growth factor)<br />

• TGF-α et TGF-β<br />

• KGF (keranitocyte growth factor)<br />

• IGF-1<br />

• FGF (fibroblast growth factor)<br />

• PDGF<br />

– Up-régulation par des cytokines de l’inflammation<br />

• IL-1α, IL-6<br />

– Mutation ou amplifications de ras

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