title: Specific interactions of monotetrahydrofuranic annonaceous acetogenins as inhibitors of mitochondrial complex I.
abstract: Annonaceous acetogenins (ACG) are a wide group of cytotoxic compounds isolated from plants of the Annonaceae family. Some of them are promising candidates to be a future new generation of antitumor drugs due to the ability to inhibit the NADH:ubiquinone oxidoreductase of the respiratory chain (mitochondrial complex I), main gate of the energy production in the cell. ACG are currently being tested on standard antitumor trials although little is known about the structure activity relationship at the molecular level. On recent studies, the relevance of several parts of the molecule for the inhibitory potency has been evaluated. Due to the great diversity of skeletons included in this family of natural products, previous studies on the presence and distribution of oxygenated groups along the alkyl chain only covered the compounds with different bis-tetrahydrofuranic (bis-THF) relative configurations. Therefore, we have investigated the inhibitory action of all the mono-tetrahydrofuranic (mono-THF) acetogenins available, which differ in the oxygenated arrangements along the molecule. Our results show that the hydroxyl and carbonyl groups, placed in the aliphatic chain that links the initial gamma-lactone moiety with the dihydroxylated tetrahydrofuranic ring system, significantly contribute for modulating the inhibitory potency of the ACG through specific effects.
authors.affiliation: Departament de Farmacologia, Facultat de Farmàcia, Universitat de València, Spain.
authors.forename: J R
authors.initials: JR
authors.lastname: Tormo
authors.forename: T
authors.initials: T
authors.lastname: Gallardo
authors.forename: R
authors.initials: R
authors.lastname: Aragón
authors.forename: D
authors.initials: D
authors.lastname: Cortes
authors.forename: E
authors.initials: E
authors.lastname: Estornell
mesh_terms: D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification / Q000494:pharmacology*; D002417:Cattle; D002851:Chromatography, High Pressure Liquid; D004347:Drug Interactions; D042967:Electron Transport Complex I; D004791:Enzyme Inhibitors / Q000302:isolation & purification / Q000494:pharmacology*; D005663:Furans / Q000302:isolation & purification / Q000494:pharmacology*; D041743:Herb-Drug Interactions; D007783:Lactones / Q000302:isolation & purification / Q000494:pharmacology*; D008929:Mitochondria, Heart / Q000187:drug effects / Q000201:enzymology*; D009097:Multienzyme Complexes / Q000037:antagonists & inhibitors*; D009247:NADH, NADPH Oxidoreductases / Q000037:antagonists & inhibitors*; D008517:Phytotherapy; D010936:Plant Extracts / Q000737:chemistry; D012639:Seeds / Q000737:chemistry
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D004791:Enzyme Inhibitors; D005663:Furans; D007783:Lactones; D009097:Multienzyme Complexes; D010936:Plant Extracts; C112079:isomurisolenin; C023107:NADH oxidase; D009247:NADH, NADPH Oxidoreductases; D042967:Electron Transport Complex I