Induction of normal phenotypes in ras-transformed cells by damnacanthal from Morinda citrifolia

Tomonori Hiramatsu, Masaya Imoto, Takashi Koyano, Kazuo Umezawa

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We have screened tropical plant extracts for substances that induce normal morphology in K-rasts-NRK cells. As a result we isolated an anthraquinone compound, damnacanthal, from the chloroform extract of the root of Morinda citrifolia. Damnacanthal induced normal morphology and cytoskeletal structure in K-rasts-NRK cells at the permissive temperature, without changing the amount and localization of Ras. The effect of damnacanthal was reversible, and the compound had no effect on the morphology of RSVts-NRK cells expressing the src oncogene. Thus, damnacanthal is a new inhibitor of ras function.

Original languageEnglish
Pages (from-to)161-166
Number of pages6
JournalCancer Letters
Issue number2-3
Publication statusPublished - 1993 Sep 30



  • Damnacanthal
  • Morinda cirtrifolia
  • Ras

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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