Bridges Lab @ CMU

Our work, entitled “Cell lysis sensing drives biofilm formation in Vibrio cholerae,” was published in Nature Communications. We find that upon exposure to lytic phages, the pathogen V. cholerae rapidly lyses, but then recovers, with surviving cells exhibiting robust biofilm formation. We find that the mechanism underlying this observation is a process we refer to as “lysis sensing”…whereby surviving cells sense a signal released by the death of their kin. We identify the cell lysis signal as an abundant cytoplasmic polyamine, norspermidine, which is detected by an inner-membrane receptor, MbaA, that in turn drives biofilm formation. We determine that additional pathogenic organisms also exhibit multicellular community formation in response to lysis. Given the pervasiveness of lysis in the environment, we propose that lysis sensing is a threat-agnostic mechanism by which bacteria can gauge endangerment.​

Irina Mikheyeva joins the lab

Oct 1, 2022:  The newest member of the lab is Irina Mikheyeva. Irina’s interests include molecular pathogenesis, signal transduction, as well as hiking and biking.

Bridges Lab opens!