title: Tailor-made fluorescent trilobolide to study its biological relevance.
abstract: Trilobolide (Tb) is a potent natural counterpart of thapsigargin, which has shown promising results in cancer clinical trials. Here, we report a rational approach to study intracellular localization and biological activity of this sesquiterpene lactone. We conjugated Tb with a green-emitting Bodipy dye attached by alternative linkers of different lengths. The live-cell imaging of the prepared bioconjugates brought clear evidence that Tb-Bodipy localized in the endoplasmic reticulum (ER) of various cancer cell lines. The localization signal was compared with ER-specific dyes. Cytotoxicity of Tb conjugates and impact on the mitochondrial physiology and nitric oxide release were also studied. The nitric oxide production and cytokine secretion in rat peritoneal cells indicate immunobiological potential of these lactone bioconjugates. In summary, our Tb-Bodipy conjugates could help us to reveal the molecular mechanism of trilobolide for its further potential use in biomedical applications.
authors.affiliation: Institute of Chemical Technology in Prague , 16628 Prague, Czech Republic.
authors.forename: Michal
authors.initials: M
authors.lastname: Jurášek
authors.forename: Silvie
authors.initials: S
authors.lastname: Rimpelová
authors.forename: Eva
authors.initials: E
authors.lastname: Kmoníčková
authors.forename: Pavel
authors.initials: P
authors.lastname: Drašar
authors.forename: Tomáš
authors.initials: T
authors.lastname: Ruml
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D001896:Boron Compounds / Q000138:chemical synthesis* / Q000494:pharmacology; D002087:Butyrates / Q000138:chemical synthesis* / Q000493:pharmacokinetics / Q000494:pharmacology; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D004721:Endoplasmic Reticulum / Q000378:metabolism; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000494:pharmacology; D005663:Furans / Q000138:chemical synthesis* / Q000493:pharmacokinetics / Q000494:pharmacology; D006801:Humans; D008928:Mitochondria / Q000187:drug effects / Q000378:metabolism; D009569:Nitric Oxide / Q000096:biosynthesis; D051381:Rats; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis
chemical_list: C095489:4,4-difluoro-4-bora-3a,4a-diaza-s-indacene; D000970:Antineoplastic Agents; D001896:Boron Compounds; D002087:Butyrates; D005456:Fluorescent Dyes; D005663:Furans; D014409:Tumor Necrosis Factor-alpha; D009569:Nitric Oxide; C086352:trilobolide