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Use of COMPARE analysis to discover functional analogues of bleomycin

  1. Author:
    Deng, J. Z.
    Newman, D. J.
    Hecht, S. M.
  2. Author Address

    Univ Virginia, Dept Chem, Charlottesville, VA 22901 USA. Univ Virginia, Dept Chem, Charlottesville, VA 22901 USA. Univ Virginia, Dept Biol, Charlottesville, VA 22901 USA. NCI, Frederick Canc Res & Dev Ctr, Nat Prod Branch, Frederick, MD 21702 USA.
    1. Year: 2000
  1. Journal: Journal of Natural Products
    1. 63
    2. 9
    3. Pages: 1269-1272
  2. Type of Article: Article
  1. Abstract:

    Bleomycin was used as the reference compound in a COMPARE analysis to identify extracts in the National Cancer Institute's Natural Products Repository exhibiting cytotoxicity profiles similar to this antitumor agent. One of the extracts so identified was a CH2Cl2-methanol extract prepared from Gymnosporia trigyna, which effected relaxation of supercoiled pSP64 DNA in the presence of Cu2+. Bioassay-guided fractionation using DNA strand-scission activity as an end point resulted in the isolation of four active principles. These were identified as syringaldehyde (1), (-)-syringaresinol (2), (+)-catechin (3), and (+)-epicatechin (4). Compounds 1 and 2 represent a new type of DNA strand-scission agent.

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