Nonpeptidic Amphiphilic Xanthone Derivatives: Structure-Activity Relationship and Membrane-Targeting Properties.

Abstract:

:We recently reported the bioinspired synthesis of a highly potent nonpeptidic xanthone, 2c (AM-0016), with potent antibacterial activity against MRSA. Herein, we report a thorough structure-activity relationship (SAR) analysis of a series of nonpeptidic amphiphilic xanthone derivatives in an attempt to identify more potent compounds with lower hemolytic activity and greater membrane selectivity. Forty-six amphiphilic xanthone derivatives were analyzed in this study and structurally classified into four groups based on spacer length, cationic moieties, lipophilic chains, and triarm functionalization. We evaluated and explored the effects of the structures on their membrane-targeting properties. The SAR analysis successfully identified 3a with potent MICs (1.56-3.125 μ/mL) and lower hemolytic activity (80.2 μg/mL for 3a versus 19.7 μg/mL for 2c). Compound 3a displayed a membrane selectivity of 25.7-50.4. Thus, 3a with improved HC50 value and promising selectivity could be used as a lead compound for further structural optimization for the treatment of MRSA infection.

journal_name

J Med Chem

authors

Koh JJ,Zou H,Lin S,Lin H,Soh RT,Lim FH,Koh WL,Li J,Lakshminarayanan R,Verma C,Tan DT,Cao D,Beuerman RW,Liu S

doi

10.1021/acs.jmedchem.5b01500

subject

Has Abstract

pub_date

2016-01-14 00:00:00

pages

171-93

issue

1

eissn

0022-2623

issn

1520-4804

journal_volume

59

pub_type

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