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- W2107354908 abstract "Although platelet-derived growth factor (PDGF)-BB is thought to participate in vascular disorders, the mechanism of PDGF-induced vascular smooth muscle cell (SMC) proliferation is not fully understood. This study was undertaken to examine the role of c-Jun in PDGF-BB-induced proliferation of rat aortic SMCs. PDGF-BB (10 ng/mL) significantly increased activator protein (AP)-1 DNA binding activity in SMCs, followed by the increase in [(3)H]thymidine incorporation and cell number. SMCs were infected with recombinant adenovirus containing TAM67, a dominant-negative c-Jun lacking the transactivation domain of wild c-Jun (Ad-DN-c-Jun), to inhibit endogenous AP-1. Ad-DN-c-Jun, which specifically blocked AP-1 transcriptional activity, significantly inhibited PDGF-BB-induced increases in [(3)H]thymidine incorporation or cell number. As shown by flow cytometric analysis, Ad-DN-c-Jun inhibited PDGF-BB-induced entrance of SMCs into S phase, leading to a G(1) arrest. Ad-DN-c-Jun attenuated PDGF-BB-induced downregulation of p27(Kip1), as shown by Western blot analysis, and the prevented PDGF-BB-induced decrease in cyclin E/cyclin-dependent kinase 2 complex-associated p27(Kip1), as shown by immunoprecipitation study. Furthermore, protein kinase assay showed that Ad-DN-c-Jun blocked PDGF-BB-induced activation of cyclin-dependent kinase 2. Our results provide the first evidence that dominant-negative c-Jun inhibits PDGF-BB-induced vascular SMC proliferation by preventing the downregulation of p27(Kip1), thereby supporting the important role of c-Jun in vascular SMC proliferation." @default.
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- W2107354908 date "2002-01-01" @default.
- W2107354908 modified "2023-10-13" @default.
- W2107354908 title "Effects of Dominant-Negative c-Jun on Platelet-Derived Growth Factor–Induced Vascular Smooth Muscle Cell Proliferation" @default.
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- W2107354908 doi "https://doi.org/10.1161/hq0102.101821" @default.
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