Microbial containment device: A platform for comprehensive analysis of microbial metabolism without sample...

Area of Science:

• Microbiology
• Metabolomics
• Analytical Chemistry

Background:

• Metabolomics is key to understanding microbial metabolism.
• Metabolic boundary fluxes offer rapid insights into cellular phenotypes and have diagnostic potential.
• Traditional intracellular metabolite analysis is labor-intensive and requires extensive sample processing.

Purpose of the Study:

• To develop and evaluate a novel sampling system, the Microbial Containment Device (MCD), for simplified metabolomics analysis.
• To enable rapid quantification of metabolic boundary fluxes with minimal sample handling.
• To demonstrate the MCD's utility in characterizing microbial metabolism and its response to antibiotics.

Main Methods:

• Designed a 96-well Microbial Containment Device (MCD) with a semi-permeable membrane for metabolite diffusion.
• Integrated the MCD with liquid chromatography-mass spectrometry (LC-MS) systems for automated sample analysis.
• Compared MCD performance against traditional culture methods for quantifying metabolic boundary fluxes.
• Applied the MCD to analyze boundary fluxes of four bacterial species and assess antibiotic effects.

Main Results:

• The MCD facilitates single-step sample preparation for metabolomics by allowing direct diffusion of metabolites.
• The device is compatible with commercial LC-MS autosamplers, significantly reducing sample handling.
• Unique metabolic boundary flux profiles were identified for four bacterial species.
• Antibiotic-induced metabolic perturbations were successfully detected using the MCD.

Conclusions:

• The Microbial Containment Device (MCD) offers a streamlined approach to metabolomics sample preparation.
• This platform enables efficient analysis of microbial metabolic boundary fluxes for various applications.
• The MCD shows promise for microbial identification, antimicrobial susceptibility testing, and clinical diagnostics.