AI Insight
Researchers have engineered Escherichia coli Nissle, a probiotic bacterium, by transferring and redesigning a natural pathway that pathogenic bacteria use to detect host stress hormones in the gut. Pathogenic bacteria normally use this sensing mechanism to regulate their movement and disease-causing abilities in response to stress hormones. The new study demonstrates how this pathway can be reprogrammed to create controllable, therapeutic bacterial systems that respond to specific gut conditions.
Why it matters
This work establishes a framework for developing "living medicines" that can sense and respond to physiological signals in the human gut. The approach could lead to engineered probiotics that detect disease states and deliver targeted therapies in response to specific biochemical signals associated with stress or illness.
Understand the Science
by Weston R. Whitaker
Pathogens sense host stress hormones in the gut and use them to regulate motility and virulence. A new study in PLOS Biology transfers this pathway to Escherichia coli Nissle and redesigns its regulation to drive programmable outputs.
Pathogens sense host stress hormones in the gut and use them to regulate motility and virulence. This Primer discusses a new PLOS Biology study which transfers this pathway to Escherichia coli Nissle and redesigns its regulation to drive programmable outputs.
Source: Harnessing pathogen stress-hormone sensing for living medicines