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Multivalent antibiotics via metal complexes: potent divalent vancomycins against vancomycin-resistant enterococci
Bengang Xing1, Chun-Wing Yu, Pak-Leung Ho
1Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
Journal of Medicinal Chemistry
|October 31, 2003
Summary
Metal-linked vancomycin dimers show potent activity against vancomycin-resistant enterococci (VRE). This approach enhances drug efficacy by combining metal complexation with receptor/ligand interactions for multivalent inhibitors.
Area of Science:
- Medicinal Chemistry
- Inorganic Chemistry
- Microbiology
Background:
- Vancomycin resistance in enterococci (VRE) poses a significant clinical challenge.
- Developing novel antimicrobial agents is crucial to combat resistant bacterial strains.
Purpose of the Study:
- To synthesize and evaluate vancomycin dimers linked by a platinum-based metal complex.
- To investigate the enhanced antimicrobial activity of these novel compounds against VRE.
Main Methods:
- Synthesis of vancomycin dimers using a rigid platinum(II) complex, [Pt(en)(H2O)2](2+).
- Determination of minimum inhibitory concentrations (MICs) against VRE strains.
- Characterization of the metal-ligand interactions and structural properties.
Main Results:
- Vancomycin dimers exhibited potent activity against VRE, with MICs around 0.8 mug/mL.
- The metal-linked dimers were approximately 720 times more potent than vancomycin alone.
- The platinum complex effectively linked vancomycin units, creating a multivalent inhibitor.
Conclusions:
- Combining metal complexation with receptor/ligand interactions is an effective strategy for designing potent antimicrobial agents.
- Vancomycin dimers represent a promising class of compounds for overcoming vancomycin resistance in enterococci.
- This approach offers a novel method for constructing multivalent inhibitors against drug-resistant bacteria.