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Anti-invasive effects and proapoptotic activity induction by the rexinoid IIF and valproic acid in combination on

A Papi1, A M Ferreri, F Guerra

  • 1Department of Experimental Evolutive Biology, University of Bologna, Bologna, Italy.

Anticancer Research
|July 4, 2012
PubMed

Insights

Sodium valproate (VPA) and 6-OH-11-O-hydroxyphenanthrene (IIF) show potent anti-cancer effects by inducing apoptosis and reducing invasion in colon cancer cells. Their combined use enhances these effects, offering a promising therapeutic strategy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Colon cancer remains a significant health concern with a need for novel therapeutic strategies.
  • Histone deacetylase (HDAC) inhibitors and retinoid X receptor (RXR) ligands represent potential avenues for cancer treatment.
  • Understanding the combined effects of these agents is crucial for developing effective therapies.

Purpose of the Study:

  • To investigate the antiproliferative and anti-invasive mechanisms of sodium valproate (VPA) and 6-OH-11-O-hydroxyphenanthrene (IIF) in colon cancer cells.
  • To evaluate the synergistic effects of VPA and IIF on apoptosis and invasion.
  • To elucidate the molecular pathways involved in their action.

Main Methods:

  • Utilized HT-29 and LoVo colon cancer cell lines.
  • Administered VPA (HDAC inhibitor) and IIF (RXR ligand) individually and in combination.
  • Assessed cell viability, apoptosis markers (BCL2, BAX, caspases), and invasion-related factors (MMPs, TIMPs).

Main Results:

  • VPA inhibited HDAC-1 and upregulated RXRγ expression.
  • Combined VPA and IIF treatment significantly reduced cell viability and enhanced apoptosis.
  • The combination therapy decreased BCL2 and increased BAX, cleaved caspase-3, and caspase-9 levels.
  • Invasiveness was reduced via inhibition of MMP9 expression and activity, with increased TIMP1 and TIMP2 levels.

Conclusions:

  • VPA and IIF exhibit significant pro-apoptotic and anti-invasive effects in HT-29 colon cancer cells.
  • The combination of VPA and IIF demonstrates enhanced therapeutic efficacy compared to individual treatments.
  • This combination strategy holds promise for colon cancer treatment by targeting both proliferation and invasion.

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