What is the general role of quorum sensing in oral biofilm maturation?

What is the general role of quorum sensing in oral biofilm maturation?

• A. QS coordinates gene expression for adhesion, EPS production, metabolism, and virulence, promoting maturation and stability.
• B. QS triggers cell death.
• C. QS reduces biofilm formation.
• D. QS only affects motility.

Answer: (B)

Quorum sensing in oral biofilms coordinates gene expression as the bacterial population grows. When signaling molecules accumulate to a threshold, cells switch on programs for adhesion and production of extracellular polymeric substances, which build the matrix that holds the biofilm together. This matrix creates the structured, protective environment of a mature biofilm and supports coordinated metabolism among resident species, optimizing resource use and resilience. In addition, virulence factors can be regulated in a density-dependent way to modulate interactions with the host and other microbes. In multispecies communities, this signaling helps integrate behaviors across different organisms, guiding the transition from initial attachment to a stable, mature biofilm with complex architecture.

Quorum sensing in oral biofilms coordinates gene expression as the bacterial population grows. When signaling molecules accumulate to a threshold, cells switch on programs for adhesion and production of extracellular polymeric substances, which build the matrix that holds the biofilm together. This matrix creates the structured, protective environment of a mature biofilm and supports coordinated metabolism among resident species, optimizing resource use and resilience. In addition, virulence factors can be regulated in a density-dependent way to modulate interactions with the host and other microbes. In multispecies communities, this signaling helps integrate behaviors across different organisms, guiding the transition from initial attachment to a stable, mature biofilm with complex architecture.