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Although it has been suggested that smad7 blocks downstream signaling of TGF-β, the role of smad7 in the EGF signaling pathway has not been fully elucidated. We determined the effect of smad7 on EGF-induced MMP-9 expression in SKBR3 breast cancer cells. The expression of smad7 and MMP-9 was increased by EGF or TGF-β1, respectively, and further increased by EGF and TGF-β1 co-treatment. EGF induced...
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