title: Porrigenins A and B, novel cytotoxic and antiproliferative sapogenins isolated from Allium porrum.
abstract: Four new sapogenins, porrigenins A (2a) and B (3a), identified as (25R)-5 alpha-spirostan-2 beta,3 beta,6 beta-triol and (25R)-2-oxo-5 alpha-spirostan-3 beta,6 beta-diol, respectively, and neoporrigenins A (2b) and B (3b) were also isolated from Allium porrum. In addition, the known agigenin (1a) and its 25S epimer, neoagigenin (1b), were also identified. Their structure elucidation was provided by comprehensive spectroscopic analyses. Compounds 1a, 2a, and 3a exhibited cytotoxicity and high antiproliferative activity on four different tumor cell lines in vitro.
authors.affiliation: Dipartimento di Chimica delle Sostanze Naturali, Università degli Studi di Napoli Federico II, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Carotenuto
authors.forename: E
authors.initials: E
authors.lastname: Fattorusso
authors.forename: V
authors.initials: V
authors.lastname: Lanzotti
authors.forename: S
authors.initials: S
authors.lastname: Magno
authors.forename: V
authors.initials: V
authors.lastname: De Feo
authors.forename: R
authors.initials: R
authors.lastname: Carnuccio
authors.forename: F
authors.initials: F
authors.lastname: D'Acquisto
mesh_terms: D000490:Allium / Q000737:chemistry*; D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification* / Q000494:pharmacology; D002240:Carbohydrate Sequence; D002455:Cell Division; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D007941:Leukemia P388 / Q000188:drug therapy; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D051379:Mice; D008969:Molecular Sequence Data; D012502:Sapogenins / Q000302:isolation & purification* / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D012502:Sapogenins; C109388:porrigenin A; C109389:porrigenin B