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Published on: July 7, 2020
Synthetic membrane-targeted antibiotics
1Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy, Wayne State University, Detroit, MI 48201, USA.
Abstract:
Antimicrobial resistance continues to evolve and presents serious challenges in the therapy of both nosocomial and community-acquired infections. The rise of resistant strains like methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant Staphylococcus aureus (VRSA) and vancomycin-resistant enterococci (VRE) suggests that antimicrobial resistance is an inevitable evolutionary response to antimicrobial use. This highlights the tremendous need for antibiotics against new bacterial targets. Agents that target the integrity of bacterial membrane are relatively novel in the clinical armamentarium. Daptomycin, a lipopeptide is a classical example of membrane-bound antibiotic. Nature has also utilized this tactic. Antimicrobial peptides (AMPs), which are found in all kingdoms, function primarily by permeabilizing the bacterial membrane. AMPs have several advantages over existing antibiotics including a broad spectrum of activity, rapid bactericidal activity, no cross-resistance with the existing antibiotics and a low probability for developing resistance. Currently, a small number of peptides have been developed for clinical use but therapeutic applications are limited because of poor bioavailability and high manufacturing cost. However, their broad specificity, potent activity and lower probability for resistance have spurred the search for synthetic mimetics of antimicrobial peptides as membrane-active antibiotics. In this review, we will discuss the different classes of synthetic membrane-bound antibiotics published since 2004.
Insights
Antimicrobial resistance necessitates novel treatments. This review explores synthetic membrane-bound antibiotics, inspired by natural antimicrobial peptides, as a promising strategy against resistant bacteria.
Area of Science:
- Microbiology
- Medicinal Chemistry
- Drug Discovery
Background:
- Antimicrobial resistance (AMR) poses a significant global health threat, driven by evolving bacterial strains like MRSA, VRSA, and VRE.
- Existing antibiotics face challenges due to resistance, creating an urgent need for novel therapeutic agents targeting new bacterial mechanisms.
- Membrane-targeting antibiotics, including lipopeptides like daptomycin and natural antimicrobial peptides (AMPs), represent a promising avenue for combating resistant infections.
Purpose of the Study:
- To review the development of synthetic membrane-bound antibiotics.
- To highlight synthetic mimetics of antimicrobial peptides (AMPs) as a novel class of antibiotics.
- To discuss advancements in synthetic membrane-active antibiotics published since 2004.
Main Methods:
- Literature review of scientific publications since 2004.
- Analysis of synthetic membrane-bound antibiotics, focusing on AMP mimetics.
- Discussion of the mechanisms of action and therapeutic potential of these agents.
Main Results:
- Antimicrobial peptides (AMPs) demonstrate broad-spectrum activity, rapid bactericidal effects, and a low probability of resistance.
- Synthetic AMP mimetics offer potential advantages, including improved bioavailability and lower manufacturing costs compared to natural AMPs.
- Research since 2004 has expanded the landscape of synthetic membrane-active antibiotics, offering new therapeutic options.
Conclusions:
- Synthetic membrane-bound antibiotics, particularly AMP mimetics, are a vital area of research for addressing antimicrobial resistance.
- These agents offer a promising alternative to conventional antibiotics due to their novel mechanism of action and reduced resistance potential.
- Continued development of synthetic membrane-active agents is crucial for future antimicrobial therapy.
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