1. STAT-3 inhibitory bisabolanes from Carthamus glaucus.
- Author
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Taglialatela-Scafati O, Pollastro F, Cicione L, Chianese G, Bellido ML, Munoz E, Özen HÇ, Toker Z, and Appendino G
- Subjects
- Anti-Inflammatory Agents chemistry, Anti-Inflammatory Agents isolation & purification, HeLa Cells, Humans, Molecular Structure, Monocyclic Sesquiterpenes, Nuclear Magnetic Resonance, Biomolecular, Sesquiterpenes chemistry, Sesquiterpenes isolation & purification, Turkey, Anti-Inflammatory Agents pharmacology, Carthamus chemistry, NF-kappa B metabolism, STAT3 Transcription Factor drug effects, Sesquiterpenes pharmacology
- Abstract
Apart from a large amount (ca. 2.0%) of α-bisabolol β-D-fucopyranoside (2a), the aerial parts of the Mediterranean weed Carthamus glaucus afforded an unusual triglyceride (E-2-crotonyl-1,3-distearolylglycerol, 7), two lipophilic flavonoids (6a,b), and a series of bisabolane fucopyranosides variously acylated on the sugar moiety (2b-e) or oxidized on the terpenoid core (3, 4a,b, 5a,b). The fucopyranoside 2a is more soluble in polar media and more versatile in terms of formulation than its aglycone [(-)-α-bisabolol, 1], an anti-inflammatory cosmetic ingredient in current short supply in its natural form. A comparative investigation of the activity of α-bisabolol (1a), the fucopyranoside 2a, and its senecioate 2b on transcription factors involved in inflammation and cancer pathways (NF-κB and STAT-3) showed only marginal activity on NF-κB inhibition for all compounds, while STAT-3 was inhibited potently by the fucoside 2a and, to a lesser extent, also by α-bisabolol. These observations qualify 2a as an easily available compound, both as an apoptotic lead structure and as a potential alternative to natural α-bisabolol (1) for pharmaceutical and/or cosmetic development.
- Published
- 2012
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