Reprogramming Probiotic Lactobacillus reuteri as a Biosensor for Staphylococcus aureus Derived AIP-I Detection

Area of Science:

• Microbiology
• Synthetic Biology
• Biotechnology

Background:

• Staphylococcus aureus infections, causing pneumonia, UTIs, and sepsis, are a significant public health concern.
• Current detection methods for S. aureus are often slow and expensive.
• Quorum sensing molecules, like autoinducer peptide-I (AIP-I), are crucial for bacterial communication and pathogenesis.

Purpose of the Study:

• To develop a rapid and cost-effective biosensor for detecting Staphylococcus species.
• To engineer probiotic lactic acid bacteria to sense the quorum sensing molecule AIP-I.
• To investigate the dynamics of S. aureus under various conditions using the developed biosensor.

Main Methods:

• Adaptation of the Staphylococcus aureus agr quorum sensing (agrQS) system into Lactobacillus reuteri.
• Engineering probiotic bacteria as biosensors for AIP-I detection.
• Quantification of AIP-I levels in nanomolar to micromolar ranges.
• Real-time monitoring of AIP-I dynamics under different stress conditions.

Main Results:

• Successfully engineered Lactobacillus reuteri to function as a biosensor for AIP-I.
• Demonstrated detection of AIP-I in the nanomolar to micromolar concentration range.
• Validated the biosensor's capability for real-time monitoring of bacterial dynamics.
• Showcased potential applications in detecting Staphylococcus contamination and drug screening.

Conclusions:

• Engineered probiotic biosensors provide a novel approach for rapid Staphylococcus detection.
• The developed system offers a cost-effective alternative to traditional diagnostic methods.
• This technology has implications for infection control in hospital settings and pharmaceutical research.