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10.1074/jbc.M116.753632

http://scihub22266oqcxt.onion/10.1074/jbc.M116.753632
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suck abstract from ncbi


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pmid28174297
      J+Biol+Chem 2017 ; 292 (12 ): 5055-5069
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  • Decorin-inducible Peg3 Evokes Beclin 1-mediated Autophagy and Thrombospondin 1-mediated Angiostasis #MMPMID28174297
  • Torres A ; Gubbiotti MA ; Iozzo RV
  • J Biol Chem 2017[Mar]; 292 (12 ): 5055-5069 PMID28174297 show ga
  • We previously discovered that systemic delivery of decorin for treatment of breast carcinoma xenografts induces paternally expressed gene 3 (Peg3), an imprinted gene encoding a zinc finger transcription factor postulated to function as a tumor suppressor. Here we found that de novo expression of Peg3 increased Beclin 1 promoter activity and protein expression. This process required the full-length Peg3 as truncated mutants lacking either the N-terminal SCAN domain or the zinc fingers failed to translocate to the nucleus and promote Beclin 1 transcription. Importantly, overexpression of Peg3 in endothelial cells stimulated autophagy and concurrently inhibited endothelial cell migration and evasion from a 3D matrix. Mechanistically, we found that Peg3 induced the secretion of the powerful angiostatic glycoprotein Thrombospondin 1 independently of Beclin 1 transcriptional induction. Thus, we provide a new mechanism whereby Peg3 can simultaneously evoke autophagy in endothelial cells and attenuate angiogenesis.
  • |*Up-Regulation [MESH]
  • |Autophagy [MESH]
  • |Beclin-1/*genetics [MESH]
  • |Cell Line [MESH]
  • |Cell Movement [MESH]
  • |Decorin/*metabolism [MESH]
  • |Endothelial Cells/cytology/metabolism [MESH]
  • |Humans [MESH]
  • |Kruppel-Like Transcription Factors/*genetics/metabolism [MESH]
  • |Neovascularization, Physiologic [MESH]
  • |Promoter Regions, Genetic [MESH]
  • |Thrombospondin 1/*metabolism [MESH]


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