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Glycopeptide Derivatives

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Resistance to glycopeptides in enterococci, which first emerged in the late 1980's and is now widespread mainly in the United States, is posing a serious clinical problem due to the lack of alternative and efficacious therapeutic options, particularly against infections caused by VanA strains that are highly resistant to glycopeptides and almost all other antibiotics. In addition, isolates of Staphylococcus aureus, known as GISA, that are poorly susceptible to vancomycin and teicoplanin have been identified. Thus, there is an urgent need to develop new and more potent glycopeptides that are active against these problematic organisms.

The following review will focus on the development of second-generation glycopeptides, namely LY333328 (Eli Lilly) and BI 397 (Biosearch Italia, in license to Versicor for North America), which are currently undergoing clinical trials in humans for their promising activity against VanA enterococci (LY333328), staphylococci (BI 397), and penicillin-resistant pneumococci. Both compounds were identified as the result of chemical programs that were aimed at pursuing activity of vancomycin-like or teicoplanin-like natural glycopeptides against VanA enterococci and multidrug-resistant staphylococci.

More recent approaches toward glycopeptides modified in their heptapeptide core are also described. These include compounds in which amino acids 1 and 3 are replaced with other amino acid moieties such as in the modification of the asparagine side chain on residue 3 as well as attempts to change the structure of the heptapeptide backbone in positions that are critical for the molecular interaction with susceptible D-Ala-D-Ala and resistant D-Ala-D-Lactate targets.

Covalently linked glycopeptide dimers and vancomycin derivatives in which vancosamine is suitably replaced with other sugar moieties will also be covered.
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Keywords: Glycopeptide Derivatives; coagulase-negative staphylococci cons; glycopeptide-dimers; methicillin resistant staphyococcus aureus mrsa; vancomycin

Document Type: Review Article

Publication date: December 1, 2001

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  • Current Medicinal Chemistry covers all the latest and outstanding developments in medicinal chemistry and rational drug design. Each issue contains a series of timely in-depth reviews written by leaders in the field covering a range of the current topics in medicinal chemistry. Current Medicinal Chemistry is an essential journal for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important developments.
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