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Bonnie Bassler

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description Bonnie Bassler Overview

Bonnie Bassler is an American molecular biologist and a professor at Princeton University, where she has conducted pioneering research in the field of microbial communication. She is best known for her discoveries regarding bacterial quorum sensing, a process by which single-celled organisms secrete chemical signaling molecules called autoinducers to coordinate collective behaviors. Her work demonstrated that bacteria can count their local population density and only trigger specific genetic responses, such as bioluminescence or virulence factor production, once a threshold is reached. This research has opened new pathways for developing alternative antimicrobial therapies.

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What is bacterial quorum sensing in Bonnie Bassler's research?

Quorum sensing is cell-to-cell communication based on secreted molecules called autoinducers. By detecting those signals, bacteria can coordinate group behaviors such as bioluminescence, biofilm formation, and virulence.

What did Bassler discover while studying Vibrio harveyi?

Her work showed that Vibrio harveyi uses multiple chemical communication channels rather than a single quorum-sensing signal. The research helped identify autoinducer-2, or AI-2, as a signal used for communication across bacterial species.

Why might blocking quorum sensing help fight infections?

Some pathogens use quorum sensing to activate virulence factors and organize biofilms only after reaching a sufficient population density. Bassler's laboratory studies ways to disrupt those messages, potentially disarming bacteria without directly killing them like a conventional antibiotic.

What position does Bonnie Bassler hold at Princeton?

Bassler is the Squibb Professor in Molecular Biology and a Howard Hughes Medical Institute investigator at Princeton University. She joined Princeton's faculty in 1994 after postdoctoral research on bioluminescent marine bacteria.

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