1. Preliminary Structure-Activity Relationship on Theonellasterol, a New Chemotype of FXR Antagonist, from the Marine Sponge Theonella swinhoei
- Author
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Stefano Fiorucci, Angela Zampella, Giuseppe Bifulco, Nobuhiro Fusetani, Maria Giovanna Chini, Barbara Renga, Claudio D'Amore, Yoichi Nakao, Maria Valeria D'Auria, Orazio Taglialatela-Scafati, Simona De Marino, Valentina Sepe, Raffaella Ummarino, Sepe, Valentina, Ummarino, Raffaella, D'Auria, MARIA VALERIA, TAGLIALATELA SCAFATI, Orazio, DE MARINO, Simona, C., D'Amore, B., Renga, M. G., Chini, G., Bifulco, Y., Nakao, N., Fusetani, S., Fiorucci, and Zampella, Angela
- Subjects
Double bond ,Stereochemistry ,Pharmaceutical Science ,Receptors, Cytoplasmic and Nuclear ,nuclear receptors ,Biology ,01 natural sciences ,Article ,03 medical and health sciences ,Transactivation ,Sponge ,Drug Discovery ,semisynthesis ,Structure–activity relationship ,Molecule ,Animals ,Humans ,marine sponges ,Steroid ,Pharmacology, Toxicology and Pharmaceutics (miscellaneous) ,lcsh:QH301-705.5 ,030304 developmental biology ,chemistry.chemical_classification ,0303 health sciences ,Theonella swinhoei ,010405 organic chemistry ,Hydrogen bond ,structure-activity relationship ,Antagonist ,Chemical modification ,Hep G2 Cells ,steroids ,theonellasterol ,farnesoid-X-receptor ,chemical modification ,0104 chemical sciences ,Molecular Docking Simulation ,Sterols ,chemistry ,lcsh:Biology (General) ,Docking (molecular) ,Nuclear receptor ,Theonella - Abstract
Using theonellasterol as a novel FXR antagonist hit, we prepared a series of semi-synthetic derivatives in order to gain insight into the structural requirements for exhibiting antagonistic activity. These derivatives are characterized by modification at the exocyclic carbon-carbon double bond at C-4 and at the hydroxyl group at C-3 and were prepared from theonellasterol using simple reactions. Pharmacological investigation showed that the introduction of a hydroxyl group at C-4 as well as the oxidation at C-3 with or without concomitant modification at the exomethylene functionality preserve the ability of theonellasterol to inhibit FXR transactivation caused by CDCA. Docking analysis showed that the placement of these molecules in the FXR-LBD is well stabilized when on ring A functional groups, able to form hydrogen bonds and π interactions, are present.
- Published
- 2012