Establishing Reference Genes for Accurate Gene Expression Profiling in Toxigenic Bacillus cereus

Area of Science:

• Microbiology
• Molecular Biology
• Genetics

Background:

• Bacillus cereus is a significant Gram-positive pathogen causing foodborne and severe infections.
• Accurate gene transcription analysis is crucial for understanding B. cereus virulence and toxin production.

Purpose of the Study:

• To identify stable reference genes for normalizing reverse transcription quantitative PCR (RT-qPCR) data in toxigenic B. cereus.
• To establish a reliable gene set for monitoring toxin gene expression dynamics.

Main Methods:

• Evaluated ten candidate reference genes for expression stability in emetic and enteropathogenic B. cereus strains.
• Utilized geNorm, NormFinder, BestKeeper, and ΔCq methods, integrating results with RefFinder.

Main Results:

• Identified rho, rpoD, and recA as the most stably expressed reference genes across tested conditions.
• The selected reference genes provide a validated tool for gene expression studies in B. cereus.

Conclusions:

• The established reference gene set offers a robust foundation for studying B. cereus toxin gene expression.
• This research aids in understanding B. cereus pathogenicity and developing mitigation strategies.