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• W1993841019 abstract "In our previous study, we have demonstrated that tissue factor pathway inhibitor (TFPI) gene could induce vascular smooth muscle cell (VSMC) apoptosis. This study was conducted to investigate whether the overexpression of the TFPI gene can induce VSMC apoptosis by inhibiting JAK-2/STAT-3 pathway phosphorylation and thereby inhibiting the expression of such downstream targets as the apoptotic protein Bcl-2 and cell cycle protein cyclin D1. The effect of TFPI on the expression of survivin, a central molecule in cell survival, was also investigated.Rat VSMCs were infected with recombinant adenovirus containing either the TFPI (Ad-TFPI) or LacZ (Ad-LacZ) gene or DMEM in vitro. TFPI expression was detected by ELISA. TUNEL staining and electron microscope were carried out to determine the apoptosis of VSMCs. The expression levels of JAK-2, p-JAK-2, STAT-3, p-STAT-3, cyclin D1, Bcl-2 and survivin were examined by western blot analysis.TFPI protein was detected in the TFPI group after gene transfer and the peak expression was at the 3rd day. At the 3rd, 5th and 7th days after gene transfer, the apoptotic rates by TUNEL assay in the TFPI group were 10.91 ± 1.66%, 13.46 ± 1.28% and 17.04 ± 1.95%, respectively, whereas those in the LacZ group were 3.28 ± 0.89%, 4.01 ± 0.72% and 4.89 ± 1.17%, respectively. We observed cell contraction, slight mitochondrial swelling, nuclear pyknosis and apoptotic body formation in TFPI-treated VSMCs using electron microscopy. JAK-2, p-JAK-2, STAT-3, p-STAT-3, cyclin D1 and Bcl-2, which are all involved in the JAK-2/STAT-3 pathway, were detected in the VSMCs on the 3rd, 5th and 7th days after gene transfer, which is consistent with previously demonstrated time points when VSMCs apoptosis occurred. The expression levels of p-JAK-2, p-STAT-3, cyclin D1 and Bcl-2 were significantly decreased over time in the TFPI group (each P<0.05) but not in the Ad-LacZ and DMEM groups. However, this attenuation of expression was not observed for JAK-2 and STAT-3 in any of the groups at any time points after gene transfer (each P>0.05). The expression level of survivin in the TFPI group also weakened significantly over time compared with the levels in the Ad-LacZ and DMEM groups (each P<0.05) at the 3rd, 5th and 7th days after gene transfer.The results demonstrated that TFPI played an apoptosis-inducing role in VSMCs in a manner that involves both the suppression of JAK-2/STAT-3 pathway phosphorylation and the down-regulation of survivin. Our data show for the first time that targeting the JAK-2/STAT-3 pathway and survivin by overexpressing TFPI may be a new avenue for the treatment of restenosis." @default.
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• W1993841019 date "2012-10-01" @default.
• W1993841019 modified "2023-09-27" @default.
• W1993841019 title "Adenovirus-mediated tissue factor pathway inhibitor gene transfer induces apoptosis by blocking the phosphorylation of JAK-2/STAT-3 pathway in vascular smooth muscle cells" @default.
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• W1993841019 doi "https://doi.org/10.1016/j.cellsig.2012.06.001" @default.
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