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- W2081330240 abstract "Abstract Introduction: Ski is an oncogenic protein that binds to and inhibits the TGF-B signaling proteins, Smad 2/3, and thereby prevents gene transcription. We hypothesized that human pancreatic cancer resists TGF-B signaling through Ski overexpression. Methods: Immunohistochemistry and western blots confirmed Ski overexpression in human pancreatic cancer. In vitro experiments assessed Ski function in Panc-1 cells by TGF-B-induced transcriptional reporter activation and growth assays in the presence of control or Ski short interfering RNAs (siRNA). Panc-1 cells were inoculated in the flank of nude mice and tumor volume measured after Ski siRNA vector or control administration. Results: Ski overexpression was detected in human pancreatic cancer specimens by immunohistochemistry (91%) and immmunoblot (67%), and in Panc-1 cells. In vitro, Ski siRNA maximally inhibited protein levels 48 hours after transfection, and TGF-B transcriptional activity was increased 2-fold compared to control siRNA treated cells (p Conclusions: Human pancreatic cancers overexpress Ski. Inhibition of Ski through RNA interference restored TGF-B signaling and growth inhibition in vitro and decreased tumor growth in vivo. These findings support a role for Ski as a suppressor of TGF-B signaling in pancreatic cancer." @default.
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- W2081330240 date "2004-09-01" @default.
- W2081330240 modified "2023-10-14" @default.
- W2081330240 title "Ski overexpression impairs TGF-B signaling and results in loss of growth control in human pancreatic cancer" @default.
- W2081330240 doi "https://doi.org/10.1016/j.jamcollsurg.2004.05.029" @default.
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