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Release and purification of fimbriae from Bordetella pertussis
Abstract:
A competitive ELISA has been used to monitor the release of fimbriae from 1.2.3 serotype of B. pertussis after treatment by different methods and fimbriae have been purified from homogenates or KSCN extracts by chromatography. Fimbriae purified from different serotypes have been studied by inhibition of bacterial agglutination, immunodiffusion and SDS-polyacrylamide gel electrophoresis. Fimbriae purified from a 1.2 serotype have been labelled in immunoelectron microscopy with a IgM monoclonal antibody to agglutinogen 2 and evidence is presented that fimbriae purified from a 1.3 serotype also carry the agglutinogen 3 specificity. A difference in subunit molecular weight has been found between fimbriae purified from 1.2 and 1.3 serotypes.
Insights
This study monitored Bordetella pertussis fimbriae release and purification. Differences in subunit molecular weight were found between fimbriae from serotypes 1.2 and 1.3.
Area of Science:
- Microbiology
- Immunology
- Biochemistry
Background:
- Bordetella pertussis fimbriae are crucial virulence factors.
- Understanding fimbrial structure and release is key to vaccine development.
Purpose of the Study:
- To monitor the release of B. pertussis fimbriae after various treatments.
- To purify and characterize fimbriae from different serotypes (1.2, 1.3).
Main Methods:
- Competitive ELISA for monitoring fimbriae release.
- Chromatography for fimbriae purification.
- Inhibition of bacterial agglutination, immunodiffusion, and SDS-PAGE for characterization.
- Immunoelectron microscopy for antigen localization.
Main Results:
- Fimbriae were successfully purified from B. pertussis serotypes 1.2 and 1.3.
- Fimbriae from serotype 1.2 carry agglutinogen 2 specificity.
- Fimbriae from serotype 1.3 carry agglutinogen 3 specificity.
- A distinct difference in subunit molecular weight was observed between 1.2 and 1.3 serotype fimbriae.
Conclusions:
- Purified fimbriae from different B. pertussis serotypes exhibit distinct characteristics.
- The findings contribute to understanding fimbrial heterogeneity and potential vaccine targets.