Atomic Force Microscopy Combined with Infrared Spectroscopy as a Tool to Probe Single Bacterium Chemistry

作者： Kamila Kochan1, Anton Y. Peleg2,3, Philip Heraud1,2, Bayden R. Wood1 1Centre for Biospectroscopy and School of Chemistry,Monash University, 2Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Microbiology,Monash University, 3Department of Infectious Diseases, The Alfred Hospital and Central Clinical School,Monash University

简介：

Overview

Atomic Force Microscopy-Infrared Spectroscopy (AFM-IR) enables nanoscale studies of bacteria, providing insights into chemical alterations related to antimicrobial resistance. This method allows for non-destructive analysis at the sub-cellular level, enhancing our understanding of drug resistance mechanisms.

Key Study Components

Area of Science

• Neuroscience
• Microbiology
• Biophysics

Background

• AFM-IR offers a powerful platform for studying bacteria.
• The nanoscale size of bacteria limits available research tools.
• Understanding antimicrobial resistance (AMR) is crucial for drug development.
• AFM-IR can probe various biological samples, including cells and tissues.

Purpose of Study

• To investigate chemical changes in bacteria related to AMR.
• To identify molecular targets for new antimicrobials.
• To monitor dynamic changes in living bacteria.

Methods Used

• Sample preparation involves growing bacteria and vortexing.
• AFM-IR imaging is performed after sample deposition on a substrate.
• Instrument calibration and background data acquisition are essential steps.
• Data collection includes AFM images and infrared spectra.

Main Results

• AFM-IR can distinguish chemical composition differences in resistant bacteria.
• Higher intensity bands were observed in the septum during cell division.
• No morphological differences were noted between resistant and susceptible strains.
• AFM-IR spectra revealed significant insights into bacterial cell wall components.

Conclusions

• AFM-IR is a valuable tool for studying bacterial chemistry.
• The method enhances understanding of AMR mechanisms.
• It can facilitate the development of new antimicrobial strategies.

Frequently Asked Questions