title: Comparison of the effects of selected chalcones, dihydrochalcones and some cyclic flavonoids on mitochondrial outer membrane determined by fluorescence spectroscopy.
abstract: The effect on mitochondrial outer membrane of 4-hydroxychalcone (1), the cyclic chalcone analogues E-2-(4'-hydroxybenzylidene)-1-indanone (2a) and E-2-(4'-hydroxybenzylidene)-1-tetralone (2b), the dihydrochalcones phloretin (3a) and phloridzin (3b), the flavanones naringenin (4a) and naringin (4b), and the flavonol quercetin (5) was investigated by fluorescence spectroscopy. Excitation and emission fluorescence spectra of each flavonoid and synthetic analogue were recorded in respiration medium containing 1 mM succinate. Initial interaction of the compounds with the outer mitochondrial membrane was investigated by recording their fluorescence polarization in the presence of rat liver mitochondria. Most of the compounds displayed an elevated fluorescence polarization on mixing with mitochondria at the zero time point. During the investigated 20 min period the initial fluorescence polarization values remained constant (1, 2a), or a gradual depression of the measured polarization values could be observed (2b, 3a, 4b, 5). In the case of naringenin (4a), however, similar to the previously investigated seven-membered cyclic chalcone analogue E-2-(4 -methoxybenzylidene)-1-benzosuberone, a slight, continuous increase of fluorescence polarization could be detected during the 20 min experiment. Phloridzin (3b) showed an increased fluorescence polarization in first 10 min, which was slightly depressed by the 20 min time point.
authors.affiliation: Department of Medical Chemistry, Biochemistry and Clinical Biochemistry, Faculty of Medicine UPJS, Trieda SNP 1, Kosice, Slovakia.
authors.forename: Vladimíra
authors.initials: V
authors.lastname: Tomecková
authors.forename: Juraj
authors.initials: J
authors.lastname: Guzy
authors.forename: Jaroslav
authors.initials: J
authors.lastname: Kusnír
authors.forename: Krisztina
authors.initials: K
authors.lastname: Fodor
authors.forename: Mária
authors.initials: M
authors.lastname: Mareková
authors.forename: Zenóbia
authors.initials: Z
authors.lastname: Chavková
authors.forename: Pál
authors.initials: P
authors.lastname: Perjési
mesh_terms: D000818:Animals; D047188:Chalcones / Q000737:chemistry / Q000494:pharmacology*; D044950:Flavanones / Q000494:pharmacology; D005419:Flavonoids / Q000737:chemistry / Q000494:pharmacology*; D005454:Fluorescence Polarization; D066298:In Vitro Techniques; D008297:Male; D008930:Mitochondria, Liver / Q000187:drug effects / Q000378:metabolism; D051336:Mitochondrial Membranes / Q000187:drug effects* / Q000378:metabolism*; D010695:Phlorhizin / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D013050:Spectrometry, Fluorescence; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet
chemical_list: D047188:Chalcones; D044950:Flavanones; D005419:Flavonoids; D010695:Phlorhizin; C005273:naringenin