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In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice
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In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice

Published on: August 23, 2019

Inhibition of trichostatin A-induced antiangiogenesis by small-interfering RNA for thrombospondin-1

Jung Hoon Kang1, Soo-A Kim, Seo-Yoon Chang

  • 1Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul 137-701, Korea.

Experimental & Molecular Medicine
|July 3, 2007
PubMed

Insights

Trichostatin A (TSA) boosts thrombospondin-1 (TSP-1) expression, inhibiting tumor cell migration and angiogenesis. This reveals TSP-1 as a key mediator in TSA

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Thrombospondin-1 (TSP-1) inhibits tumor growth and angiogenesis.
  • Vascular Endothelial Growth Factor (VEGF) positively regulates TSP-1.
  • Trichostatin A (TSA) suppresses tumor progression by modulating VEGF signaling.

Purpose of the Study:

  • To investigate the effect of TSA on TSP-1 expression.
  • To determine the role of TSA-induced TSP-1 in cell motility and angiogenesis.
  • To explore TSA's anti-tumorigenic mechanisms via TSP-1 modulation.

Main Methods:

  • TSA treatment of HeLa and bovine aortic endothelial cells.
  • Measurement of TSP-1 mRNA and protein levels.
  • Analysis of TSP-1 promoter activity.
  • Assessment of cell migration and capillary-like tube formation.
  • Inhibition of TSP-1 using neutralizing antibodies and small-interfering RNA.

Main Results:

  • TSA significantly upregulated TSP-1 expression at both mRNA and protein levels.
  • TSA modulated TSP-1 promoter activity.
  • Both TSA and exogenous TSP-1 inhibited cell migration.
  • TSA and exogenous TSP-1 reduced capillary-like tube formation.
  • TSP-1 inhibition abrogated TSA's anti-angiogenic effects.

Conclusions:

  • TSP-1 is a critical mediator of TSA's anti-angiogenic activity.
  • TSA enhances TSP-1 expression, contributing to its anti-tumor effects.
  • Targeting TSP-1 may be a viable strategy for TSA-based cancer therapy.

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