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Published on: February 8, 2017
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Ionizable Lipid Containing Nanocarriers for Antimicrobial Agent Delivery
Haitao Yu1, Sampa Sarkar1, Z L Shaw2
1School of Science STEM College RMIT University Melbourne Victoria 3000 Australia.
Small Science
|April 11, 2025
Summary
This study developed novel ionizable lipid nanoparticles (LNPs) to deliver the antibiotic Piperacillin (Pip). These advanced nanocarriers enhance drug delivery and combat antimicrobial resistance (AMR).
Area of Science:
- Nanotechnology and Materials Science
- Infectious Diseases and Microbiology
- Drug Delivery Systems
Background:
- Antimicrobial resistance (AMR) is a critical global health challenge, diminishing the effectiveness of traditional antibiotics against evolving bacterial pathogens, particularly Gram-negative strains.
- Existing antibiotic therapies struggle against bacteria with advanced defense mechanisms, necessitating innovative drug delivery strategies to restore efficacy.
Purpose of the Study:
- To explore the development of self-assembled ionizable lipid nanoparticles (LNPs) for enhanced delivery of the broad-spectrum antibiotic Piperacillin (Pip).
- To investigate the impact of incorporating both cationic (ALC-0315) and anionic (oleic acid) ionizable lipids on LNP properties and antimicrobial activity.
- To provide a novel strategy for tailoring LNP composition to overcome antimicrobial resistance.
Main Methods:
- Utilized synchrotron small-angle X-ray scattering and dynamic light scattering to analyze LNP mesophase transition, pH responsiveness, and nanostructure.
- Employed a 2-(p-toluidino)-6-naphthalene sulfonic acid assay to study ionization behavior in acidic conditions.
- Characterized the physicochemical properties (size, nanostructure, surface charge) of LNPs with varying ionizable lipid compositions.
Main Results:
- Incorporation of cationic ionizable lipid ALC-0315 induced pH responsiveness and mesophase transitions in LNPs, suitable for acidic infection environments.
- The combination of ALC-0315 and anionic oleic acid modulated LNP physicochemical properties and synergistically enhanced antimicrobial potency.
- The developed LNPs demonstrated improved permeability and fusion with bacterial membranes, boosting antibiotic efficacy.
Conclusions:
- Tailoring ionizable lipid compositions in LNPs offers a promising strategy for advanced antimicrobial drug delivery.
- This approach enhances the efficacy of Piperacillin and provides a new avenue for combating antimicrobial resistance.
- The study presents a novel nanocarrier system with potential to address the global AMR crisis.
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