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Updated: Jun 26, 2026

Visualization of Bacterial Toxin Induced Responses Using Live Cell Fluorescence Microscopy
Published on: October 1, 2012
In Vivo Targets of Pasteurella Multocida Toxin
Arshiya Banu1,2, Alistair J Lax1, Agamemnon E Grigoriadis2
1Department of Microbiology, King's College London, Guy's Hospital, London SE1 9RT, UK.
Pasteurella multocida toxin (PMT) targets multiple organs by modifying G-proteins. This study reveals PMT
Area of Science:
- Microbiology
- Toxicology
- Cell Biology
Background:
- Pasteurella multocida (PMT) causes disease in animals and humans.
- PMT activates G-proteins, leading to cellular effects.
- Previous studies focused on organ-specific pathogenesis of PMT.
Purpose of the Study:
- To screen all organs targeted by PMT in vivo.
- To investigate the tissue- and cell-specific effects of PMT.
- To utilize PMT as a tool for G-protein research.
Main Methods:
- Utilized a QE antibody to detect PMT-modified G-proteins.
- Screened multiple organs for PMT effects in vivo.
- Assessed G-alpha protein modification, proliferation markers, and β-catenin expression.
Main Results:
- PMT treatment demonstrated multiple in vivo targets.
- G-alpha protein modification was observed across various tissues.
- Stimulation of proliferation markers and active β-catenin expression occurred in a tissue-specific manner.
Conclusions:
- Short-term PMT treatment affects multiple organs.
- PMT induces specific cellular changes in a tissue-dependent manner.
- PMT is a valuable tool for studying G-protein functions in vivo.
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