6533b855fe1ef96bd12b1bf7

RESEARCH PRODUCT

Novel inhibitors of mitochondrial respiratory chain: endoperoxides from the marine tunicate Stolonica socialis.

Angelo FontanaErnesto EstornellCimino GGonzález McGavagnin M

subject

UbiquinolMagnetic Resonance SpectroscopyStereochemistryIn Vitro TechniquesFunctional activityElectron Transportchemistry.chemical_compoundElectron Transport Complex IIIMarine Natural ProductOxidoreductaseMultienzyme ComplexesDrug DiscoveryMediterranean SeaAnimalsNADH NADPH OxidoreductasesUrochordataEnzyme InhibitorsFuranschemistry.chemical_classificationElectron Transport Complex IbiologyCytochrome cElectron Transport Complex IISuccinate dehydrogenaseElectron Transport Complex IIMyocardiumDioxolanesMitochondriaPeroxidesSuccinate DehydrogenaseMitochondrial respiratory chainchemistryBiochemistryElectron Transport Complex ICoenzyme Q – cytochrome c reductasebiology.proteinMolecular MedicineCattleStructure ElucidationOxidoreductases

description

The Mediterranean tunicate Stolonica socialis contains a new class of powerful cytotoxic acetogenins, generically named stolonoxides. In this paper, which also details the isolation and chemical characterization of a minor component (3a) of the tunicate extract, we report the potent inhibitory activity (IC(50) < 1 microM) of stolonoxides (1a and 3a) on mitochondrial electron transfer. The compounds affect specifically the functionality of complex II (succinate:ubiquinone oxidoreductase) and complex III (ubiquinol:cytochrome C oxidoreductase) in mammalian cells, thereby causing a rapid collapse of the whole energetic metabolism. This result, which differs from the properties of similar known products (e.g., 6), reflects the molecular features of stolonoxides.

yearjournalcountryeditionlanguage
2001-05-25Journal of medicinal chemistry
10.1021/jm0011373https://pubmed.ncbi.nlm.nih.gov/11428930