Antimicrobial resistance (AMR) poses a significant threat to global health, fueled by the diverse and mobile nature of antimicrobial resistance genes (ARGs). Horizontal gene transfer (HGT) mechanisms, like conjugation, transduction, and transformation, enable the spread of ARGs among bacteria, leading to multidrug resistance. Plasmids, a type of mobile genetic element (MGE), play a central role in this dissemination. To combat AMR, eliminating MGEs, especially plasmids, has been proposed as a potential strategy. Various chemical and biological approaches have been developed to target and remove ARG carriers, focusing on resistance plasmids.
The discovery of antibiotics, a milestone in medical history, has been overshadowed by the emergence of AMR. The misuse and overuse of antibiotics have accelerated the evolution of ARGs, leading to increased morbidity, mortality, and healthcare costs. Plasmids, hosting key ARGs, are significant players in conferring resistance to a wide range of antibiotics in bacteria such as ESKAPE pathogens. Understanding the role of MGEs like plasmids in AMR dissemination is crucial for developing effective strategies to combat resistance.
A promising approach to addressing AMR is by targeting MGEs to limit the spread of ARGs. Plasmids, being the carriers of many clinically significant ARGs, are prime targets for elimination. Various MGEs, including insertion sequences, transposons, integrons, and integrative and conjugative elements, contribute to the mobility and accumulation of ARGs. By disrupting the mechanisms of MGE-mediated HGT, the acquisition and transmission of resistance can be impeded, offering a potential solution to combat antibiotic resistance.
Chemical agents like detergents, intercalating agents, biocides, and nanoparticles have shown promise in eliminating resistance plasmids from bacterial populations. These agents act through different mechanisms, such as replication blockage, DNA damage, or inhibition of conjugation, to reduce the burden of ARGs. Conjugation inhibitors have been explored to disrupt the transfer of plasmids, thereby hindering the spread of resistance. By utilizing a combination of these chemical approaches, the acquisition and transmission of ARGs can be curtailed, offering a strategy to combat AMR.
Key Takeaways:
– Horizontal gene transfer mechanisms, facilitated by mobile genetic elements like plasmids, contribute significantly to antimicrobial resistance.
– Targeting mobile genetic elements, especially plasmids, presents a potential strategy to limit the spread of antibiotic resistance.
– Chemical agents, including detergents, intercalating agents, biocides, and nanoparticles, offer effective means to eliminate resistance plasmids from bacterial populations.
– Conjugation inhibitors can disrupt the transfer of plasmids, hindering the dissemination of antimicrobial resistance genes.
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