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Using Hemagglutination, Surface Shearing, and Acid Treatment to Study Fimbriae in Proteus mirabilis

Stephanie D Himpsl1, Melanie M Pearson2, Harry L T Mobley2

  • 1Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA. shimpsl@umich.edu.

Methods in Molecular Biology (Clifton, N.J.)
|July 17, 2019
PubMed

Insights

Researchers present three methods for studying bacterial fimbriae, crucial for virulence. These techniques, including hemagglutination assays and protein separation, aid in understanding bacterial adhesion and colonization.

Area of Science:

  • Microbiology
  • Bacterial Pathogenesis
  • Molecular Biology

Background:

  • Bacterial adherence to mucosal surfaces is essential for virulence and colonization.
  • Fimbriae and protein adhesins are key mediators of this surface attachment.
  • Proteus mirabilis, an opportunistic pathogen, utilizes mannose-resistant/Proteus-like (MR/P) fimbriae.

Purpose of the Study:

  • To describe three accessible methods for studying bacterial fimbriae and their adhesive properties.
  • To provide protocols applicable to the opportunistic pathogen Proteus mirabilis.
  • To facilitate research on bacterial surface proteins involved in colonization.

Main Methods:

  • Hemagglutination assay using erythrocytes to demonstrate fimbrial production and adhesion.
  • Protein shearing technique to detach surface-exposed proteins.
  • Acid treatment to dissociate fimbrial subunits into monomers.

Main Results:

  • The hemagglutination assay provides a simple and economical method for assessing fimbrial function.
  • The described methods allow for the isolation and analysis of fimbrial structures.
  • Protocols are effective for studying MR/P fimbriae of Proteus mirabilis.

Conclusions:

  • The presented methods offer practical approaches for investigating bacterial fimbriae.
  • These techniques can enhance the understanding of bacterial adherence mechanisms.
  • The study provides valuable tools for research on bacterial virulence factors.
Keywords:
FimbriaeHemagglutinationMannose-resistant/Proteus-like fimbriaePili

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