title: Efficient chemoenzymatic synthesis, cytotoxic evaluation, and SAR of epoxysterols.
abstract: A library of diastereomerically pure epoxysterols, prepared by combining chemical and enzymatic methodologies, was evaluated for cytotoxicity toward human cancer and noncancer cell lines. Unsaturated steroids were oxidized by magnesium bis(monoperoxyphthalate) hexahydrate in acetonitrile, and the resulting epimeric epoxides were enzymatically separated using Novozym 435 or lipase AY. Some of the synthesized epoxysterols have potent cytotoxicity and higher activity on cancer cell lines HT29 and LAMA-84.
authors.affiliation: Centro de Estudos Farmaceuticos, Laboratorio Quiimica Farmaceutica, Faculdade de Farmacia, Universidade de Coimbra, 3000-548 Coimbra, Portugal.
authors.forename: João F S
authors.initials: JF
authors.lastname: Carvalho
authors.forename: M Manuel
authors.initials: MM
authors.lastname: Cruz Silva
authors.forename: João N
authors.initials: JN
authors.lastname: Moreira
authors.forename: Sérgio
authors.initials: S
authors.lastname: Simões
authors.forename: M Luisa
authors.initials: ML
authors.lastname: Sá E Melo
mesh_terms: D000970:Antineoplastic Agents / Q000737:chemistry* / Q000494:pharmacology; D045744:Cell Line, Tumor; D020650:Combinatorial Chemistry Techniques; D004354:Drug Screening Assays, Antitumor; D004852:Epoxy Compounds / Q000737:chemistry* / Q000494:pharmacology; D006801:Humans; D013261:Sterols / Q000737:chemistry* / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D000970:Antineoplastic Agents; D004852:Epoxy Compounds; D013261:Sterols