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Related Concept Videos

Antimicrobial Proteins01:23

Antimicrobial Proteins

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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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The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
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Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
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Related Experiment Video

Updated: Jun 24, 2025

Author Spotlight: An Antimicrobial Fabric Using Nano-Herbal Encapsulation of Essential Oils
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Broad-Spectrum Supramolecularly Reloadable Antimicrobial Coatings.

Fiora Artusio1, Lukas Müller1,2, Nicolò Razza1

  • 1Institute of Materials, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.

ACS Applied Materials & Interfaces
|June 3, 2024
PubMed
Summary

A novel antimicrobial paint using quaternary ammonium compounds (QACs) offers long-lasting, broad-spectrum protection against bacteria and viruses. This durable and restorable coating is ideal for healthcare and food safety applications.

Keywords:
antimicrobial surfacesquaternary ammonium compoundsreloadingscalabilitysupramolecular interactions

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Infectious Disease Control

Background:

  • Current antimicrobial coatings face limitations including short efficacy, narrow spectrum, poor performance with organic matter, and high cost.
  • Widespread adoption of antimicrobial surfaces is hindered by these challenges, impacting healthcare and food safety.
  • Developing effective, durable, and cost-efficient antimicrobial solutions remains a critical need.

Purpose of the Study:

  • To develop an inexpensive, broadly effective, and durable antimicrobial paint using quaternary ammonium compounds (QACs).
  • To investigate supramolecular chemistry principles for enhanced QAC association and controlled release.
  • To create a restorable antimicrobial surface for diverse applications.

Main Methods:

  • Utilized waterborne latex particles supramolecularly associated with quaternary ammonium compounds (QACs).
  • Determined optimal QAC pairing via ion immobilization on self-assembled monolayers.
  • Employed polymer brushes to increase QAC surface loading density.
  • Tested antimicrobial efficacy against four bacteria and four viruses.

Main Results:

  • Developed a cost-effective paint with long-lasting antimicrobial action due to slow QAC release.
  • Demonstrated broad-spectrum efficacy against tested bacteria and viruses, even in the presence of organic material.
  • Confirmed efficacy persistence over 90 washes and successful restoration by spraying QAC solution.

Conclusions:

  • The developed QAC-based antimicrobial paint offers a durable, restorable, and cost-effective solution for infection control.
  • This technology has significant potential for application in healthcare settings and food production environments.
  • The supramolecular approach provides a versatile platform for designing advanced antimicrobial surfaces.