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Tissue factor pathway inhibitor suppresses the growth of human vascular smooth muscle cells through regulating cell

Xia Dong1, Liping Song, Dunwan Zhu

  • 1Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomedical Materials, Tianjin 300192, China.

Molecular Biology Reports
|December 7, 2010
PubMed

Insights

Tissue factor pathway inhibitor (TFPI) gene transfer halts human vascular smooth muscle cell (hVSMC) proliferation. TFPI induces apoptosis and G1 cell cycle arrest by modulating key cell cycle regulatory proteins.

Area of Science:

  • Vascular Biology
  • Cell Cycle Regulation
  • Molecular Medicine

Background:

  • Vascular smooth muscle cells (VSMCs) are crucial in vascular proliferative disorders like restenosis.
  • Tissue factor pathway inhibitor (TFPI) is known to suppress VSMC proliferation and migration.
  • Preliminary studies indicated TFPI gene induces apoptosis in human VSMCs (hVSMCs).

Purpose of the Study:

  • To investigate the role of TFPI gene in the cell cycle regulation of hVSMCs.
  • To determine how TFPI gene transfer affects hVSMC proliferation and cell cycle progression.

Main Methods:

  • hVSMCs were isolated and transfected with a pIRES-TFPI plasmid.
  • TFPI expression was confirmed using RT-PCR.
  • Cell cycle analysis was performed using flow cytometry.
  • Protein level changes were assessed via Western blotting.

Main Results:

  • TFPI gene transfer significantly elevated TFPI expression in hVSMCs.
  • TFPI treatment resulted in cell cycle arrest at the G1 phase.
  • Western blotting revealed increased p21 and p53 levels.
  • TFPI gene transfer decreased cyclin D and phosphorylated cdk4/cdk6 levels.

Conclusions:

  • TFPI gene transfer effectively induces G1 cell cycle arrest in hVSMCs.
  • TFPI modulates key cell cycle regulators, including p21, p53, cyclin D, cdk4, and cdk6.
  • TFPI holds potential as a therapeutic agent for vascular proliferative diseases.

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