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Cefoperazone-treated Mouse Model of Clinically-relevant Clostridium difficile Strain R20291
Published on: December 10, 2016
Construction and analysis of chromosomal Clostridium difficile mutants
Jennifer R O'Connor1, Dena Lyras, Kylie A Farrow
1Australian Bacterial Pathogenesis Program, Department of Microbiology, Monash University, Vic. 3800, Australia.
Molecular Microbiology
|August 24, 2006
Summary
Researchers developed a new genetic tool to study Clostridium difficile, a dangerous hospital-acquired infection. This method allows for targeted gene inactivation, aiding in understanding C. difficile disease mechanisms.
Area of Science:
- Microbiology
- Molecular Biology
- Genetics
Background:
- Clostridium difficile is a significant nosocomial pathogen.
- Studying C. difficile pathogenesis is hindered by limited genetic manipulation tools.
Purpose of the Study:
- To develop a reproducible method for targeted insertional inactivation of chromosomal genes in C. difficile.
- To investigate the function of putative response regulator genes, rgaR and rgbR.
Main Methods:
- Utilized an unstable E. coli-C. perfringens shuttle vector as a conditional lethal vector for gene delivery.
- Employed insertional inactivation to target rgaR and rgbR genes.
- Performed transcriptomic analysis and protein purification.
Main Results:
- Successfully insertionally inactivated rgaR and rgbR genes.
- Identified that C. difficile RgaR positively regulates four genes, including a putative agrBD operon.
- Demonstrated RgaR protein binds specifically to VirR boxes upstream of target gene promoters.
Conclusions:
- Developed a novel and reproducible genetic manipulation methodology for C. difficile.
- This tool significantly enhances the ability to study C. difficile molecular pathogenesis.
- Provides insights into the regulatory mechanisms controlling virulence gene expression in C. difficile.
