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  • Title: Upregulation of the matrix metalloproteinase-1 gene by the Ewing's sarcoma associated EWS-ER81 and EWS-Fli-1 oncoproteins, c-Jun and p300.
    Author: Fuchs B, Inwards CY, Janknecht R.
    Journal: FEBS Lett; 2003 Oct 09; 553(1-2):104-8. PubMed ID: 14550555.
    Abstract:
    The mechanisms of action of Ewing's sarcoma (EWS) associated EWS-ETS oncoproteins have largely remained unresolved. Here, we analyzed how two EWS-ETS proteins, EWS-ER81 and EWS-Fli-1, in vitro activate the matrix metalloproteinase (MMP)-1 promoter that is upregulated in a subset of EWSs. EWS-ER81 and EWS-Fli-1 interact with and thereby activate the MMP-1 promoter, which is potentiated by the cofactor p300 and the proto-oncoprotein c-Jun. Further, EWS-ER81 binds to c-Jun in vitro and in vivo. The interaction between c-Jun, p300 and EWS-ER81 or EWS-Fli-1 may also be relevant to the regulation of other yet-to-be-identified genes that are responsible for EWS formation.
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