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 Chemjournal_title
Journal of medicinal chemistryauthors
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 Sdoi
10.1021/acs.jmedchem.5b01500subject
Has Abstractpub_date
2016-01-14 00:00:00pages
171-93issue
1eissn
0022-2623issn
1520-4804journal_volume
59pub_type
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