title: Antiproliferative activity of withanolides against human breast cancer cell lines.
abstract: The in vitro antiproliferative activity of a series of 22 naturally occurring withanolides was examined against the T-47D, MCF7, MCF7/BUS, MDA-MB-231, and SK-Br-3 human solid tumor breast cancer cell lines. The most active compound showed GI(50) values in the range 0.16-0.71 muM. The aromatic withanolide 19 exhibited specific activity for the estrogen-receptor-positive cell lines (T-47D, MCF7, and MCF7/BUS). Overall, the results demonstrated the relevance of the substitution pattern on the A and B rings on the resultant antiproliferative activity.
authors.affiliation: Unidad de Investigacion, Hospital Universitario de Gran Canaria Dr. Negrin, Bco. Ballena s/n 35010, Las Palmas de Gran Canaria, Spain.
authors.forename: Rubén P
authors.initials: RP
authors.lastname: Machin
authors.forename: Adriana S
authors.initials: AS
authors.lastname: Veleiro
authors.forename: Viviana E
authors.initials: VE
authors.lastname: Nicotra
authors.forename: Juan C
authors.initials: JC
authors.lastname: Oberti
authors.forename: José
authors.initials: J
authors.lastname: M Padrón
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000494:pharmacology*; D001943:Breast Neoplasms / Q000473:pathology*; D045744:Cell Line, Tumor; D020650:Combinatorial Chemistry Techniques; D004354:Drug Screening Assays, Antitumor; D005260:Female; D006801:Humans; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D013329:Structure-Activity Relationship; D054358:Withanolides / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D054358:Withanolides