Metabolic interactions control the transfer and spread of plasmid-encoded antibiotic resistance during...

Area of Science:

• Microbiology
• Molecular Biology
• Ecology

Background:

• Surface-associated microbial systems are key sites for the dissemination of plasmid-encoded antibiotic resistance.
• The influence of surface association on plasmid transfer dynamics and proliferation is not fully understood.
• Metabolic interactions within surface-associated communities may drive spatial organization with implications for resistance spread.

Purpose of the Study:

• To investigate how metabolic interactions regulate the spatial self-organization of microbial populations.
• To determine the impact of this self-organization on the transfer and proliferation of plasmid-encoded antibiotic resistance.
• To elucidate the mechanisms by which resource competition and cross-feeding affect resistance dissemination.

Main Methods:

• Utilizing surface-associated microbial models to study population dynamics.
• Analyzing spatial organization resulting from resource competition and cross-feeding.
• Quantifying plasmid transfer rates and recipient proliferation under different metabolic conditions.

Main Results:

• Resource competition leads to spatial segregation of populations, significantly repressing plasmid transfer.
• Resource cross-feeding promotes spatial intermixing of populations, thereby enhancing plasmid transfer.
• Emergent spatial arrangements dictated by metabolic interactions influence the proliferation of plasmid recipients.

Conclusions:

• Metabolic interactions are critical regulators of spatial self-organization in surface-associated microbial communities.
• This self-organization directly impacts the transfer and proliferation dynamics of plasmid-encoded antibiotic resistance.
• Understanding these interactions is crucial for controlling the spread of antimicrobial resistance in microbial biofilms and other surface-associated environments.