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Updated: May 31, 2026

Vascular Balloon Injury and Intraluminal Administration in Rat Carotid Artery
09:41

Vascular Balloon Injury and Intraluminal Administration in Rat Carotid Artery

Published on: December 23, 2014

Trichostatin A prevents neointimal hyperplasia via activation of Krüppel like factor 4

Hae Jin Kee1, Jin-Sook Kwon, Sera Shin

  • 1Department of Pharmacology and Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea. sshjkee@empas.com

Vascular Pharmacology
|July 19, 2011
PubMed

Insights

Trichostatin A (TSA) prevents vascular smooth muscle cell (VSMC) proliferation and neointimal hyperplasia by activating the Krüppel like factor 4 (KLF4)/p21/p27 pathway. This finding offers a potential therapeutic strategy for vascular diseases like restenosis.

Area of Science:

  • Vascular Biology
  • Molecular Medicine
  • Pharmacology

Background:

  • Vascular smooth muscle cell (VSMC) proliferation is central to vascular diseases such as restenosis.
  • Histone deacetylase (HDAC) inhibitors regulate gene expression and cell cycle arrest, but the specific role of trichostatin A (TSA) in neointimal proliferation is unclear.

Purpose of the Study:

  • To investigate the effect and mechanism of TSA in preventing VSMC proliferation and neointimal hyperplasia.
  • To elucidate the role of Krüppel like factor 4 (KLF4) in TSA-mediated inhibition of VSMC proliferation.

Main Methods:

  • Balloon injury model in rat carotid artery with local TSA administration.
  • In vitro VSMC proliferation assays (MTT, [³H]thymidine incorporation) with TSA, FBS, PDGF-BB.
  • KLF4 overexpression and knockdown experiments.
  • Analysis of KLF4, p21, and p27 mRNA and protein expression, and promoter activity.

Main Results:

  • Local TSA administration significantly reduced neointimal hyperplasia in vivo.
  • TSA inhibited VSMC proliferation and DNA synthesis in response to growth factors.
  • KLF4 overexpression suppressed VSMC proliferation, while KLF4 knockdown increased it.
  • TSA treatment increased KLF4 expression, which in turn upregulated p21 and p27 expression and promoter activity.
  • The anti-proliferative effect of TSA was dependent on KLF4.

Conclusions:

  • TSA effectively inhibits neointimal thickening and VSMC proliferation.
  • TSA exerts its anti-proliferative effects through the KLF4/p21/p27 signaling pathway.
  • This pathway represents a potential therapeutic target for managing vascular proliferative diseases.

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