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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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Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
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Antimicrobial Effectiveness01:28

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The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
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Updated: Dec 28, 2025

Evaluation of Antimicrobial Activities of Nanoparticles and Nanostructured Surfaces In Vitro
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Metal-Based Nanoparticles as Antimicrobial Agents: An Overview.

Elena Sánchez-López1,2,3, Daniela Gomes4, Gerard Esteruelas1

  • 1Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy, University of Barcelona, 08028 Barcelona, Spain.

Nanomaterials (Basel, Switzerland)
|February 14, 2020
PubMed
Summary

Metal-based nanoparticles show broad-spectrum antibacterial activity against priority pathogens. Their non-specific toxicity mechanisms make them effective against resistant bacteria, offering new antibiotic alternatives.

Keywords:
AgNPsAuNPsCuONPsZnONPsantibacterial activitymetal-based nanoparticles

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Area of Science:

  • Nanomedicine and Materials Science
  • Microbiology and Infectious Diseases

Background:

  • Metal-based nanoparticles (MBPs) are recognized for their biomedical potential, particularly against priority bacterial pathogens.
  • Their efficacy stems from non-specific toxicity mechanisms, hindering bacterial resistance development and broadening antibacterial spectrum.
  • MBPs have demonstrated significant promise against both Gram-positive and Gram-negative bacteria.

Purpose of the Study:

  • To provide a comprehensive review of metal nanoparticles as antimicrobial agents.
  • To emphasize the role of silver nanoparticles while reviewing others like gold, zinc oxide, copper, and copper oxide nanoparticles.
  • To comparatively discuss production methods, characterization, pharmacokinetics, and toxicological risks.

Main Methods:

  • Literature review focusing on metal nanoparticles with antimicrobial properties.
  • Comparative analysis of different metal nanoparticle types, including silver, gold, zinc oxide, copper, and copper oxide.
  • Inclusion of data on production, characterization, pharmacokinetics, and toxicology.

Main Results:

  • Most metal nanoparticles exhibit promising efficacy against a wide range of bacteria.
  • Silver nanoparticles are highlighted for their potent antimicrobial effects.
  • Comparative data on production, characterization, pharmacokinetics, and toxicity are presented.

Conclusions:

  • Metal nanoparticles represent a valuable alternative for developing novel antibiotics, especially against multi-drug resistant Gram-negative bacteria.
  • Understanding their production, properties, and safety is crucial for clinical translation.
  • Further research into comparative efficacy and safety profiles will guide therapeutic applications.