title: Bioactive triterpene derivatives from latex of two Euphorbia species.
abstract: We have investigated the antifeedant and toxic effects of 23 semisynthetic terpenoid derivatives obtained through chemical modifications of the major components of Euphorbia resinifera (alpha-euphol and alpha-euphorbol) and E. officinarum (obtusifoliol and 31-norlanostenol) latex on several insect species (Spodoptera littoralis, Myzus persicae and Rhopalosiphum padi), their selective cytotoxicity on insect Sf9 and mammalian CHO cells and their phytotoxic effects on Lactuca sativa. The conversions focused mainly on positions 3,7,11, and 24 with several oxidizing agents. A total of 18 compounds affected S. littoralis growth (IGR). Our results support the importance of the C-3 substituent, suggest the involvement of the C-7 substituent and indicate that the C-3 hydroxyl is not essential for the IGR effect. Overall, Sf9 cells were more sensitive to the active compounds than CHO cells. All of these compounds had non selective moderate phytotoxic effects on radicle elongation of L. sativa.
authors.affiliation: Laboratoire de Chimie Biomoléculaire, Substances Naturelles et Réactivité, Faculté des Sciences Semlalia, Université Cadi Ayyad, BP. 2390 Marrakech, Morocco.
authors.forename: Noureddine
authors.initials: N
authors.lastname: Mazoir
authors.forename: Ahmed
authors.initials: A
authors.lastname: Benharref
authors.forename: María
authors.initials: M
authors.lastname: Bailén
authors.forename: Matías
authors.initials: M
authors.lastname: Reina
authors.forename: Azucena
authors.initials: A
authors.lastname: González-Coloma
mesh_terms: D000818:Animals; D001042:Aphids / Q000187:drug effects; D016466:CHO Cells; D006224:Cricetinae; D003412:Cricetulus; D028481:Euphorbia / Q000737:chemistry*; D005247:Feeding Behavior / Q000187:drug effects; D007306:Insecticides / Q000737:chemistry* / Q000494:pharmacology*; D007814:Larva / Q000187:drug effects; D007840:Latex / Q000737:chemistry*; D015394:Molecular Structure; D018411:Spodoptera / Q000187:drug effects; D014315:Triterpenes / Q000737:chemistry* / Q000494:pharmacology*
chemical_list: D007306:Insecticides; D007840:Latex; D014315:Triterpenes