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Related Concept Videos

Antimicrobial Proteins01:23

Antimicrobial Proteins

Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...

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Production and Testing of Antimicrobial Peptides and Their Mimics
10:35

Production and Testing of Antimicrobial Peptides and Their Mimics

Published on: April 10, 2026

Self-assembled cationic peptide nanoparticles as an efficient antimicrobial agent.

Lihong Liu1, Kaijin Xu, Huaying Wang

  • 1Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore 138669, Singapore.

Nature Nanotechnology
|July 8, 2009
PubMed
Summary
This summary is machine-generated.

Novel peptide nanoparticles show potent antimicrobial activity against drug-resistant microbes. These nanoparticles effectively treat infections, including those in the brain, by crossing the blood-brain barrier.

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Last Updated: Jun 21, 2026

Production and Testing of Antimicrobial Peptides and Their Mimics
10:35

Production and Testing of Antimicrobial Peptides and Their Mimics

Published on: April 10, 2026

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11:56

Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids

Published on: May 4, 2018

Construction of Cyclic Cell-Penetrating Peptides for Enhanced Penetration of Biological Barriers
10:12

Construction of Cyclic Cell-Penetrating Peptides for Enhanced Penetration of Biological Barriers

Published on: September 19, 2022

Area of Science:

  • Biotechnology
  • Nanomedicine
  • Microbiology

Background:

  • Antimicrobial cationic peptides are crucial for combating multi-drug-resistant microbes.
  • Conventional peptides often adopt alpha-helical or beta-sheet structures to disrupt bacterial cell surfaces.

Purpose of the Study:

  • To investigate the antimicrobial properties of novel core-shell nanoparticles self-assembled from amphiphilic peptides.
  • To evaluate the efficacy of these nanoparticles against various pathogens and in preclinical infection models.

Main Methods:

  • Self-assembly of amphiphilic peptides into core-shell nanoparticles.
  • Antimicrobial susceptibility testing against bacteria, yeasts, and fungi.
  • In vivo efficacy studies in mouse models of Staphylococcus aureus infection.
  • Assessment of blood-brain barrier penetration and efficacy in a rabbit model of bacterial meningitis.

Main Results:

  • The peptide nanoparticles exhibited strong antimicrobial activity against a broad spectrum of microbes.
  • Nanoparticles demonstrated a high therapeutic index in mouse models of Staphylococcus aureus infection.
  • The nanoparticles successfully crossed the blood-brain barrier and reduced bacterial load in infected rabbit brains.

Conclusions:

  • Core-shell peptide nanoparticles represent a novel class of potent antimicrobial agents.
  • These nanoparticles show promise for treating systemic infections and challenging infections like bacterial meningitis.
  • The ability to cross the blood-brain barrier enhances their therapeutic potential for central nervous system infections.