Cytotoxic and PTP1B inhibitory activities from Erythrina abyssinica

Bioorg Med Chem Lett. 2009 Dec 1;19(23):6745-9. doi: 10.1016/j.bmcl.2009.09.108. Epub 2009 Oct 1.


Bioassay-guided fractionation of the EtOAc extract of the stem bark of Erythrina abyssinica (Leguminosae) resulted in the isolation of three new (1-3), along with 12 known (4-15) pterocarpan derivatives. Their chemical structures were determined by physicochemical and spectroscopic data analysis (IR, UV, [alpha](D), CD, 1D and 2D NMR, and MS data). All the isolates were evaluated for their inhibitory effects on protein tyrosine phosphatase-1B (PTP1B), as well as their growth inhibition on MCF7, tamoxifen-resistant MCF7 (MCF7/TAMR), adriamycin-resistant MCF7 (MCF7/ADR) and MDA-MB-231 breast cancer cell lines. Compounds which exhibited PTP1B inhibitory activity (IC(50) values ranging from 4.2+/-0.2 to 19.3+/-0.3 microM) showed strong cytotoxic activity (IC(50) values from 5.6+/-0.7 to 28.0+/-0.2 microM). Our data suggested that pterocarpans could be considered as new anticancer materials by PTP1B inhibition.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antineoplastic Agents / chemistry
  • Antineoplastic Agents / pharmacology*
  • Cell Line, Tumor
  • Cell Proliferation / drug effects
  • Drug Design
  • Drug Screening Assays, Antitumor
  • Enzyme Inhibitors / chemistry
  • Enzyme Inhibitors / pharmacology*
  • Erythrina / chemistry*
  • Humans
  • Molecular Structure
  • Plant Bark / chemistry
  • Protein Tyrosine Phosphatase, Non-Receptor Type 1 / antagonists & inhibitors*
  • Stereoisomerism


  • Antineoplastic Agents
  • Enzyme Inhibitors
  • Protein Tyrosine Phosphatase, Non-Receptor Type 1