Abstract
Introduction: The increased resistance of glycopeptide based antibiotics has become a serious problem for the chemotherapy of infections triggered by resistant Gram-positive bacteria. This has motivated the urgent sincere efforts to develop potent glycopeptide-based antibiotics in both academy and industry research laboratories. Understanding of the mechanism of action of natural and modified glycopeptides is considered as the basis for the rational design of compounds with valuable properties to achieve the fundamental results. Several hydrophobic glycopeptide analogues active against resistant strains were developed during the last two decades. Three drugs, namely, oritavancin, telavancin and dalbavancin were approved by FDA in 2013-2014. It was found that hydrophobic derivatives act through different mechanisms without binding with the modified target of resistant bacteria.
Types: Different types of chemical modifications led to several glycopeptide analogues active against Gram-negative bacteria as advocated by in vitro studies or demonstrating potent antiviral activity in the cell models. Conclusion: A new class of glycopeptide antibiotics with potent activity against sensitive and resistant bacterial strains has been recently reported with the aim to overcome the resistance, however, there are a lot of obscure problems in the complete understanding of their mechanisms of actions. In this review, we summarized the achievements of synthetic methods devoted to the construction of new polycyclic glycopeptide antibiotics and described the studies related to their mechanism of actions.Keywords: Glycopeptide antibiotics, Drug resistance, Mechanism of action, Semisynthetic derivatives, Vancomycin.
Graphical Abstract
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