Constituents of Two Dioscorea Species That Potentiate Antibiotic Activity against MRSA

Sibandze, Gugu F., Stapleton, Paul and Gibbons, Simon (2020) Constituents of Two Dioscorea Species That Potentiate Antibiotic Activity against MRSA. Journal of Natural Products, 83 (5). pp. 1696-1700. ISSN 0163-3864

[img] PDF (Accepted_Manuscript) - Submitted Version
Restricted to Repository staff only until 4 May 2021.

Download (451kB) | Request a copy
[img] XML Word Processing Document (DOCX) (supporting information) - Submitted Version
Restricted to Repository staff only until 4 May 2021.

Download (8MB) | Request a copy

Abstract

The isolation of two diarylnonanoids from Dioscorea cotinifolia possessing antibiotic-potentiating activity against resistant strains of S. aureus are reported. The diarylnonanoids are a class of natural products similar in structure to the diarylheptanoids, which have a wide spectrum of reported biological activities. One of the diarylnonanoids (1) isolated possesses a chiral center, and to deduce its configuration, the modified Mosher ester method was used. Using both 1D and 2D NMR data, as many protons as possible were assigned to both the R- and S-MTPA esters, and the configuration of the chiral center in 1 was determined to be R. Both the chiral and achiral diarylnonanoid (2) exhibited potent antibiotic-potentiating activity with the chiral natural product showing a greater tetracycline-potentiating activity than 2. Interestingly, 2 gave a higher norfloxacin-potentiating activity with a resultant higher efflux pump inhibitory activity. Manipulation of the structure of the diarylnonanoids through synthesis could lead to improved biological activity.

Item Type: Article
Faculty \ School: Faculty of Science > School of Pharmacy
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 14 May 2020 00:07
Last Modified: 26 Jun 2020 23:59
URI: https://ueaeprints.uea.ac.uk/id/eprint/75140
DOI: 10.1021/acs.jnatprod.9b01006

Actions (login required)

View Item View Item