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Nonselective mevalonate kinase inhibitor as a novel class of antibacterial agents.
Cholesterol 2015
Introduction. There are a few evidences about targeting isoprenoids biosynthesis pathway in bacteria for finding new antibiotics. This study was conducted to assess antibacterial effects of vanadyl sulfate (VS), one of the mevalonate kinase inhibitors to find a new target for killing bacteria. Materials and Methods. Antibacterial effect of VS alone and in combination with glycine or EDTA was assessed on Escherichia coli and Pseudomonas aeruginosa as Gram-negative and Staphylococcus aureus and Enterococcus faecalis as Gram-positive bacteria using serial dilution method and minimum inhibitory concentrations (MICs) identified. Result. MICs for S. aureus and E. coli were 4 and 8 mg/mL, respectively. VS could not affect the growth of two other bacteria. However, VS in combination with glycine not only inhibited the growth of E. faecalis and P. aeruginosa, but also reduced MICs for VS-sensitive bacteria (S. aureus and E. coli). EDTA could reduce MIC for E. coli and P. aeruginosa. Conclusion. VS could inhibit the growth of S. aurous and E. coli, and adding glycine or EDTA improved VS antibacterial activity presumably via instability of the cell wall and enhanced transport of VS through bacterial cell wall. Inhibition of the isoprenoid pathway might provide new tools to overcome bacterial resistance.
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