Efficacy, Stability, and Safety Evaluation of New Polyphenolic Xanthones Towards Identification of Bioactive Compounds to Fight Skin Photoaging
作者:Diana I. S. P. Resende、Mariana C. Almeida、Bruna Maciel、Helena Carmo、José Sousa Lobo、Carlotta Dal Pozzo、Sara M. Cravo、Gonçalo P. Rosa、Aida Kane-Pagès、Maria do Carmo Barreto、Isabel F Almeida、Maria Emília de Sousa、Madalena M. M. Pinto
DOI:10.3390/molecules25122782
日期:——
stress, making the search for new antioxidant compounds highly desirable in this field. Naturally occurring xanthones are polyphenolic compounds that can be found in microorganisms, fungi, lichens, and some higher plants. This class of polyphenols has a privileged scaffold that grants them several biological activities. We have previously identified simple oxygenated xanthones as promising antioxidants
Synthesis of a Small Library of Nature-Inspired Xanthones and Study of Their Antimicrobial Activity
作者:Diana I. S. P. Resende、Patrícia Pereira-Terra、Joana Moreira、Joana Freitas-Silva、Agostinho Lemos、Luís Gales、Eugénia Pinto、Maria Emília de Sousa、Paulo Martins da Costa、Madalena M. M. Pinto
DOI:10.3390/molecules25102405
日期:——
in-house series of aminated xanthones 16–33, was tested for in-vitro antimicrobial activity against seven bacterial (including two multidrug-resistant) strains and five fungal strains. 1-(Dibromomethyl)-3,4-dimethoxy-9H-xanthen-9-one (7) and 1-(dibromomethyl)-3,4,6-trimethoxy-9H-xanthen-9-one (8) exhibited antibacterial activity against all tested strains. In addition, 3,4-dihydroxy-1-methyl-9H-xanthen-9-one
Evaluation of the pharmacophoric motif of the caged Garcinia xanthones
作者:Oraphin Chantarasriwong、Woo Cheal Cho、Ayse Batova、Warinthorn Chavasiri、Curtis Moore、Arnold L. Rheingold、Emmanuel A. Theodorakis
DOI:10.1039/b913496d
日期:——
The combination of unique structure and potent bioactivity exhibited by several family members of the caged Garciniaxanthones, led us to evaluate their pharmacophore. We have developed a Pd(0)-catalyzed method for the reverse prenylation of catechols that, together with a Claisen/Diels–Alder reaction cascade, provides rapid and efficient access to various caged analogues. Evaluation of the growth inhibitory activity of these compounds leads to the conclusion that the intact ABC ring system containing the C-ring caged structure is essential to the bioactivity. Studies with cluvenone (7) also showed that these compounds induce apoptosis and exhibit significant cytotoxicity in multidrug-resistant leukemia cells. As such, the caged Garciniaxanthone motif represents a new and potent pharmacophore.