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Heat-Induced Structural Changes in Lactoferrin for Enhanced Mucoadhesion.

Bianca Hazt1, Daniel J Read2, Oliver G Harlen2

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|October 18, 2025
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Summary
This summary is machine-generated.

Heating lactoferrin (a protein) enhances its mucoadhesion by altering its structure. This protein-based mucoadhesion relies on hydrophobic interactions, offering a new strategy for drug delivery systems.

Keywords:
QCM-Ddenaturationhydrophobic interactionmucinprotein aggregation

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Area of Science:

  • Biomaterials Science
  • Protein Engineering
  • Drug Delivery Systems

Background:

  • Biocompatible mucoadhesive materials are crucial for effective therapeutic strategies.
  • Cationic proteins like lactoferrin show promise as natural alternatives to synthetic mucoadhesives.

Purpose of the Study:

  • To investigate thermal denaturation of lactoferrin as a method to enhance mucoadhesion.
  • To elucidate the structural changes and binding mechanisms involved in lactoferrin-mucin interactions.

Main Methods:

  • Structural analysis using light scattering, circular dichroism spectroscopy, gel-electrophoresis, and atomic force microscopy.
  • Mucoadhesion evaluation via rheology, confocal microscopy, and quartz crystal microbalance with dissipation monitoring.

Main Results:

  • Heat treatment (95 °C) significantly enhances lactoferrin's affinity for mucin.
  • The enhanced mucoadhesion mechanism is primarily driven by hydrophobic interactions, not disulfide bonds.
  • Lactoferrin-mucin complexes exhibit high surface activity and artificial shear-thinning properties.

Conclusions:

  • Thermal denaturation is a viable strategy to improve lactoferrin-based mucoadhesion.
  • Hydrophobic interactions play a key role in the enhanced mucoadhesion of denatured lactoferrin.
  • This study provides a novel design approach for developing advanced natural protein-based mucoadhesive systems.