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Related Concept Videos

Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

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Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
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Lipopolysaccharides (LPS) are crucial components of the outer membrane of Gram-negative bacteria, serving both structural and functional roles. It contributes to membrane stability and protects bacteria from host immune responses. LPS is composed of three major regions—lipid A, a core oligosaccharide, and an O antigen. The biosynthesis and assembly of LPS involve a highly coordinated set of enzymatic reactions and transport mechanisms. Additionally, LPS is recognized as an endotoxin,...
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Updated: Aug 26, 2025

Nanomechanics of Drug-target Interactions and Antibacterial Resistance Detection
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Engineering Self-Assembled Endolysin Nanoparticles against Antibiotic-Resistant Bacteria.

Christian K O Dzuvor1, Bhuvana K Shanbhag1, Tayyaba Younas1

  • 1Bioengineering Laboratory, Department of Chemical and Biological Engineering, Monash University, Clayton, Victoria3800, Australia.

ACS Applied Bio Materials
|October 4, 2022
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Summary

Engineered protein nanoparticles combat antibiotic resistance. These P128 nanoparticles show potent antibacterial activity against resistant bacteria, offering a stable alternative to traditional antibiotics.

Keywords:
antibacterialantibiotic resistanceendolysinprotein engineeringprotein nanoparticlesself-assembly

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Microbiology

Background:

  • Antibiotic resistance is a critical global health threat, driving the need for novel antimicrobial strategies.
  • Protein-based nanoparticles offer unique advantages like biocompatibility, biodegradability, and versatility for various applications.
  • The potential of protein nanoparticles as antibacterial agents against resistant bacteria remains underexplored.

Purpose of the Study:

  • To engineer protein-only nanoparticles for combating antibiotic-resistant Gram-positive bacteria.
  • To investigate the antibacterial efficacy and stability of these novel nanoparticles.

Main Methods:

  • Utilized a self-assembling peptide (P114) to facilitate the pH-triggered assembly of a phage lytic enzyme (P128) into nanoparticles (P128NANO).
  • Evaluated the bactericidal ability, potency, and stability of P128NANO compared to native P128 and monomeric forms.
  • Assessed the mechanism of action, focusing on bacterial cell wall damage.

Main Results:

  • P128NANO demonstrated significantly enhanced bactericidal activity, requiring 2-3 fold lower concentrations than controls.
  • These nanoparticles were particularly effective against methicillin-resistant Staphylococcus aureus (MRSA) strains.
  • P128NANO exhibited improved thermal and storage stability, withstanding temperatures up to 65 °C.

Conclusions:

  • Engineered endolysin nanoparticles (P128NANO) represent a potent antimicrobial alternative to conventional antibiotics.
  • The nanostructure of P128NANO enhances antibacterial efficacy through multivalent interactions and increased local enzyme concentration.
  • This approach offers a promising strategy to address the challenge of antibiotic resistance.