title: Qualitative analysis of MDR-reversing Anastasia Black (Russian black sweet pepper, Capsicum annuum, Solanaceae) extracts and fractions by HPLC and LC-MS-MS methods.
abstract: In earlier experiments, the MDR (multidrug resistance)-reversal activities of Anastasia Black (Russian black sweet pepper) extracts had been analysed. Recently, the most effective MDR reversing extracts and fractions have been separated by HPLC (high-performance liquid chromatography, for carotenoids) and LC-MS-MS (HPLC combined with mass spectrometry, for phenolic compounds) methods. As a result of the analytical studies, the following flavonoids had been identified: feruloyl glucopyranoside, quercetin rhamnopyranoside glucopyranoside, luteolin glucopyranoside arabinopyranoside, apigenin glucopyranoside arabinopyranoside, quercetin rhamnopyranoside, luteolin arabinopyranoside diglucopy-ranoside, hesperidine and luteolin glucuronide. According to the literature, the aglycones of these phenolic compounds exhibit MDR-reversal activity in vitro, and the connection between the phenolic content of Anastasia Black and MDR-reversal action was therefore studied by different analytical methods. The results of this study revealed that the identified flavonoids of Anastasia Black may be only partially responsible for the modulation of the MDR of mouse lymphoma cells. Other lipophilic compounds, most probably carotenoids, present in Russian black sweet pepper may act as inhibitors of MDR reversal.
authors.affiliation: Department of Medical Microbiology and Immunobiology, Faculty of Medicine, University of Szeged, Dóm ter 10, H-6720 Szeged, Hungary.
authors.forename: Zsuzsanna
authors.initials: Z
authors.lastname: Schelz
authors.forename: Joseph
authors.initials: J
authors.lastname: Molnár
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Fogliano
authors.forename: Rosalia
authors.initials: R
authors.lastname: Ferracane
authors.forename: Rita
authors.initials: R
authors.lastname: Pernice
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Shirataki
authors.forename: Noboru
authors.initials: N
authors.lastname: Motohashi
mesh_terms: D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology; D000975:Antioxidants / Q000494:pharmacology; D002212:Capsicum / Q000737:chemistry*; D002338:Carotenoids / Q000737:chemistry / Q000494:pharmacology; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002853:Chromatography, Liquid / Q000379:methods*; D005419:Flavonoids / Q000737:chemistry / Q000494:pharmacology; D013058:Mass Spectrometry / Q000379:methods*; D051379:Mice; D008517:Phytotherapy; D029222:Piper nigrum / Q000737:chemistry*; D010936:Plant Extracts / Q000494:pharmacology; D019657:Solanaceae / Q000737:chemistry*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D000975:Antioxidants; D005419:Flavonoids; D010936:Plant Extracts; D002338:Carotenoids