Investigational New Drugs

, Volume 27, Issue 6, pp 491–502

The fungal secondary metabolite trichodimerol inhibits TGF-β dependent cellular effects and tube formation of MDA-MB-231 cells

PRECLINICAL STUDIES

DOI: 10.1007/s10637-008-9201-9

Cite this article as:
Serwe, A., Anke, T. & Erkel, G. Invest New Drugs (2009) 27: 491. doi:10.1007/s10637-008-9201-9

Summary

The transforming growth factor-β (TGF-β) family of ligands has a pivotal role as regulators of cell growth, differentiation and migration. Overexpression of TGF-β has been associated with breast, colon, hepatocellular, lung and pancreatic cancer. Importantly, overexpression of TGF-β correlates with tumor progression, metastasis, angiogenesis and poor prognostic outcome. Therefore, TGF-β signaling has emerged as an attractive target for the development of new cancer therapeutics. In a search for metabolites from fungi inhibiting the TGF-β dependent expression of a reporter gene in HepG2 cells, we found that trichodimerol, a previously isolated bisorbicillinoid, inhibited serine phosphorylation of the TGF-β activated Smad2/3 transcription factors and antagonized the cellular effects of TGF-β including reporter gene activation and expression of TGF-β inducible genes in HepG2 and MDA-MB-231 cells. In addition, trichodimerol blocked IFN-γ, IL-6 and IL-4 induced activation of Stat1, Stat3 and Stat6 transcription factors by inhibiting serine and tyrosine phosphorylation. In an in vitro angiogenesis assay, 20 μM trichodimerol completely abrogated the capillary-like tube formation of MDA-MB-231 cells on Matrigel.

Keywords

TGF-β signaling Inhibitor Trichodimerol Fungal metabolite Vasculogenic mimicry 

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.Institute for Biotechnology and Drug Research (IBWF e. V.)KaiserslauternGermany
  2. 2.Department of BiotechnologyUniversity of KaiserslauternKaiserslauternGermany

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