Bistable Gene Expression in Pseudomonas Aeruginosa
Recent research has uncovered that the bacterium Pseudomonas aeruginosa exhibits bistable gene expression, a phenomenon where identical cells show different levels of gene activity. This discovery sheds light on how this deadly pathogen adapts and survives in hostile environments such as hospitals. The study focuses on the glpD gene, which shows variable expression linked to the bacterium’s ability to cause infections. Understanding this mechanism is crucial because P. aeruginosa is a major cause of hospital-acquired infections and is often resistant to antibiotics. Bistability in Microorganisms Bistability refers to the existence of two distinct expression states of the same gene within genetically identical cells. This variation can be inherited by daughter cells, a process called epigenetic inheritance. It allows bacteria to diversify their behaviour and adapt to changing environments. In Pseudomonas aeruginosa, bistability may help the pathogen survive immune responses and a...
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