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Development and challenges of antimicrobial peptide delivery strategies in bacterial therapy: A review

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ELSEVIER
DOI: 10.1016/j.ijbiomac.2023.126819

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Antimicrobial peptides; Stimuli; response; Nano-drug delivery system; Bacterial infection; Drug resistance

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The escalating global prevalence of antimicrobial resistance poses a critical threat to public health. The shortage of novel antimicrobial agents aggravates this predicament. Antimicrobial peptides, known for their intrinsic antibacterial activity, offer a promising avenue to tackle bacterial resistance. However, their clinical utility is hindered by limited bioavailability and susceptibility to degradation. The emergence of nanocarriers provides a transformative approach for peptide delivery, enabling precise release based on dynamic microenvironmental factors.
The escalating global prevalence of antimicrobial resistance poses a critical threat, prompting concerns about its impact on public health. This predicament is exacerbated by the acute shortage of novel antimicrobial agents, a scarcity attributed to the rapid surge in bacterial resistance. This review delves into the realm of antimicrobial peptides, a diverse class of compounds ubiquitously present in plants and animals across various natural organisms. Renowned for their intrinsic antibacterial activity, these peptides provide a promising avenue to tackle the intricate challenge of bacterial resistance. However, the clinical utility of peptide-based drugs is hindered by limited bioavailability and susceptibility to rapid degradation, constraining efforts to enhance the efficacy of bacterial infection treatments. The emergence of nanocarriers marks a transformative approach poised to revolutionize peptide delivery strategies. This review elucidates a promising framework involving nanocarriers within the realm of antimicrobial peptides. This paradigm enables meticulous and controlled peptide release at infection sites by detecting dynamic shifts in microenvironmental factors, including pH, ROS, GSH, and reactive enzymes. Furthermore, a glimpse into the future reveals the potential of targeted delivery mechanisms, harnessing inflammatory responses and intricate signaling pathways, including adenosine triphosphate, macrophage receptors, and pathogenic nucleic acid entities. This approach holds promise in fortifying immunity, thereby amplifying the potency of peptide-based treatments. In summary, this review spotlights peptide nanosystems as prospective solutions for combating bacterial infections. By bridging antimicrobial peptides with advanced nanomedicine, a new therapeutic era emerges, poised to confront the formidable challenge of antimicrobial resistance head-on.

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