Fate of a bioactive fluorescent wortmannin derivative in cells Academic Article uri icon


MeSH Major

  • Androstadienes
  • Fluorescent Dyes


  • Here, we report on NBD-Wm, a fluorescent wortmannin (Wm) probe that maintains the bioactivity of Wm as an inhibitor of PI3 kinase and as an antiproliferative agent. The attachment of the NBD fluorochrome permits NBD-Wm in cells to be monitored by NBD fluorescence-based methods such as FACS or fluorescence microscopy or with an anti-NBD antibody. The fluorescence of NBD-Wm treated cells reached a peak at 1.5 h and then decreased because of the extrusion of a fluorescent compound into the culture media. Cells accumulated NBD-Wm to levels about 30-fold higher than those in the media. NBD-Wm modified five major proteins, with the modification of the catalytic subunit of PI3 kinase being a minor band. The bioactivity of NBD-Wm, coupled with a variety of techniques available for determining its disposition, suggest that NBD-Wm can be a useful tool in understanding the mechanism of action of viridins.

publication date

  • January 2008



  • Academic Article



  • eng

Digital Object Identifier (DOI)

  • 10.1021/bc7002204

PubMed ID

  • 17988080

Additional Document Info

start page

  • 130

end page

  • 7


  • 19


  • 1