Single Cell Measurements of Vacuolar Rupture Caused by Intracellular Pathogens

作者： Charlotte Keller*1, Nora Mellouk*1, Anne Danckaert2, Roxane Simeone3, Roland Brosch3, Jost Enninga1, Alexandre Bobard1 1Dynamique des Interactions Hôte Pathogène,Institut Pasteur, Paris, France, 2Imagopole,Institut Pasteur, Paris, France, 3Pathogenomique Mycobacterienne Integrée,Institut Pasteur, Paris, France

简介：

Overview

This study presents a method for tracking endomembrane rupture caused by intracellular pathogens Shigella flexneri and Mycobacterium tuberculosis. The assay utilizes CCF4, a FRET probe, to monitor bacterial invasion in host cells.

Key Study Components

Area of Science

• Microbiology
• Cell Biology
• Pathogen-Host Interactions

Background

• Intracellular pathogens can disrupt host cell membranes.
• Understanding these interactions is crucial for developing antibiotics.
• CCF4 is a sensitive probe for detecting bacterial activity.
• High-throughput assays can facilitate rapid screening of antibiotics.

Purpose of Study

• To develop a robust method for tracking bacterial invasion.
• To assess the effectiveness of antibiotics against intracellular pathogens.
• To provide insights into pathogen-host dynamics at a cellular level.

Methods Used

• Loading host cells with CCF4 dye.
• Infecting cells with bacterial strains and incubating.
• Measuring fluorescence intensity ratios to detect bacterial presence.
• Using automated microscopy for high-throughput analysis.

Main Results

• The method successfully tracks endomembrane rupture in real-time.
• Fluorescence intensity ratios indicate bacterial activity in host cells.
• Automated analysis allows for efficient data collection.
• The assay is adaptable for screening potential antibiotics.

Conclusions

• This approach provides a valuable tool for studying intracellular pathogens.
• It enhances our understanding of bacterial invasion mechanisms.
• The method can aid in the discovery of new therapeutic strategies.

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