Virus-inspired surface-nanoengineered antimicrobial liposome:A potential system to simultaneously achieve high activity and selectivity

Enveloped viruses such as SARS-CoV-2 frequently have a highly infectious nature and are considered effective natural delivery systems exhibiting high efficiency and specificity.Since simultaneously enhancing the activity and selectivity of lipopeptides is a seemingly unsolvable problem for conventional chemistry and pharmaceutical approaches,we present a biomimetic strategy to construct lipopeptide-based mimics of viral architectures and infections to enhance their antimicrobial efficacy while avoiding side effects.Herein,a surface-nanoengineered antimicrobial liposome(SNAL)is developed with the morphological features of enveloped viruses,including a moderate size range,lipid-based membrane structure,and highly lipopeptide-enriched bilayer surface.The SNAL possesses virus-like infection to bacterial cells,which can mediate high-efficiency and high-selectivity bacteria binding,rapidly attack and invade bacteria via plasma membrane fusion pathway,and induce a local“burst”release of lipopeptide to produce irreversible damage of cell membrane.Remarkably,viral mimics are effective against multiple pathogens with low minimum inhibitory concentrations(1.6-6.3μg mL1),high bactericidal efficiency of>99%within 2 h,>10-fold enhanced selectivity over free lipopeptide,99.8%reduction in skin MRSA load after a single treatment,and negligible toxicity.This bioinspired design has significant potential to enhance the therapeutic efficacy of lipopeptides and may create new opportunities for designing next-generation antimicrobials.

Membrane-disruptive peptides/peptidomimetics-based therapeutics: Promising systems to combat bacteria and cancer in the drug-resistant era

Membrane-disruptive peptides/peptidomimetics(MDPs)are antimicrobials or anticarcinogens that present a general killing mechanism through the physical disruption of cell membranes,in contrast to conventional chemotherapeutic drugs,which act on precise targets such as DNA or specific enzymes.Owing to their rapid action,broad-spectrum activity,and mechanisms of action that potentially hinder the development of resistance,MDPs have been increasingly considered as future therapeutics in the drug-resistant era.Recently,growing experimental evidence has demonstrated that MDPs can also be utilized as adjuvants to enhance the therapeutic effects of other agents.In this review,we evaluate the literature around the broad-spectrum antimicrobial properties and anticancer activity of MDPs,and summarize the current development and mechanisms of MDPs alone or in combination with other agents.Notably,this review highlights recent advances in the design of various MDP-based drug delivery systems that can improve the therapeutic effect of MDPs,minimize side effects,and promote the codelivery of multiple chemotherapeutics,for more efficient antimicrobial and anticancer therapy.