Planta Med 2004; 70(7): 657-665
DOI: 10.1055/s-2004-827191
Original Paper
Natural Product Chemistry
© Georg Thieme Verlag KG Stuttgart · New York

Structure-Activity Relationships for Euphocharacins A - L, a New Series of Jatrophane Diterpenes, as Inhibitors of Cancer Cell P-Glycoprotein

Gabriella Corea1 , Ernesto Fattorusso1 , Virginia Lanzotti2 , Riccardo Motti3 , Pierre-Noël Simon4 , Charles Dumontet4 , Attilio Di Pietro5
  • 1Dipartimento di Chimica delle Sostanze Naturali, Università di Napoli ”Federico II”, Napoli, Italy
  • 2DISTAAM, Università degli Studi del Molise, Campobasso, Italy
  • 3Dipartimento di Arboricoltura, Botanica e Patologia Vegetale, Università di Napoli ”Federico II”, Portici (NA), Italy
  • 4INSERM U590, Lyon, France
  • 5Institut de Biologie et Chimie des Proteines, UMR 5086 CNRS/Université Claude Bernard-Lyon I et IFR 128, BioSciences Lyon-Gerland, Lyon, France
Weitere Informationen

Publikationsverlauf

Received: December 7, 2003

Accepted: March 31, 2004

Publikationsdatum:
15. Juli 2004 (online)

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Abstract

The Mediterranean spurge Euphorbia characias L. afforded twelve new diterpenes based on a jatrophane skeleton named euphocharacins A - L. Their chemical structures were elucidated by extensive nuclear magnetic resonance and mass spectrometry methods. Euphocharacins A - L were tested as inhibitors of the daunomycin-efflux activity of P-glycoprotein from cancer cells. The results were used to extend the structure-activity relationship established for this class of compounds, highlighting the positive effects of propyl and benzoyl groups at positions 3 and 9, respectively, and evidencing the negative effect of a free hydroxyl group at position 2. Among the tested compounds, euphocharacins C and I showed an activity higher than cyclosporin to inhibit Pgp-mediated daunomycin transport.