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Related Experiment Video

Updated: Dec 11, 2025

Atomic Force Microscopy Imaging and Force Spectroscopy of Supported Lipid Bilayers
10:15

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Atomic force microscopy to elucidate how peptides disrupt membranes.

Katharine Hammond1, Maxim G Ryadnov2, Bart W Hoogenboom3

  • 1National Physical Laboratory, Hampton Road, Teddington TW11 0LW, UK; London Centre for Nanotechnology, University College London, London WC1H 0AH, UK; Department of Physics & Astronomy, University College London, London WC1E 6BT, UK.

Biochimica Et Biophysica Acta. Biomembranes
|August 25, 2020
PubMed
Summary

Atomic force microscopy (AFM) visualizes how peptides disrupt cell membranes. Advances in AFM enable real-time studies of antimicrobial peptides and their kinetics, revealing new insights into membrane disruption mechanisms.

Keywords:
Antimicrobial peptidesAtomic force microscopyHigh resolution imagingMembrane disruptionPhospholipid membranesSupported lipid bilayers

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Area of Science:

  • Biophysics
  • Materials Science
  • Biochemistry

Background:

  • Atomic force microscopy (AFM) is a key technique for studying molecular interactions at the nanoscale.
  • Peptide-membrane interactions are crucial for understanding cellular processes and developing therapeutics.
  • Previous studies have utilized AFM to visualize membrane disruption by various peptides.

Purpose of the Study:

  • To review methodological advances in AFM for studying peptide-induced membrane disruption.
  • To highlight how AFM provides nanometre resolution for dynamic investigations.
  • To discuss the application of AFM in understanding antimicrobial and host defense peptide mechanisms.

Main Methods:

  • Utilizing reconstituted lipid bilayers for AFM experiments.
  • Employing high-speed AFM modalities for kinetic studies.
  • Imaging peptide action on live cells in real-time.

Main Results:

  • AFM enables visualization of membrane disruption mechanisms by antimicrobial peptides.
  • Studies have elucidated the action of peptides targeting malignant cells and biofilms.
  • High-speed AFM allows for the investigation of antimicrobial kinetics.

Conclusions:

  • Methodological advancements in AFM offer unprecedented insights into peptide-membrane interactions.
  • AFM is a powerful tool for dissecting the dynamics of membrane disruption.
  • The technique facilitates the study of peptide action in both model systems and live cells.