Related Experiment Video
Updated: Aug 2, 2025
09:29
Mycobacterium tuberculosis Extracellular Vesicle Enrichment through Size Exclusion Chromatography
Published on: May 19, 2022
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Dynamin-like proteins mediate extracellular vesicle secretion in Mycobacterium tuberculosis
Shamba Gupta1, Madhuri Bhagavathula1, Vartika Sharma1
1Department of Medicine, New Jersey Medical School, Public Health Research Institute, Rutgers University, Newark, NJ, USA.
EMBO Reports
|April 20, 2023
Summary
Mycobacterium tuberculosis secretes extracellular vesicles (EVs) crucial for pathogenesis. Isoniazid-induced proteins IniA and IniC are key to EV production, enabling bacterial communication with host cells.
Area of Science:
- Microbiology
- Cell Biology
- Immunology
Background:
- Mycobacterium tuberculosis (Mtb) releases extracellular vesicles (EVs) containing diverse biomolecules.
- EVs are implicated in tuberculosis pathogenesis, but their production mechanisms remain unclear.
Purpose of the Study:
- To identify factors and molecular mechanisms governing Mtb EV biogenesis.
- To investigate the role of specific Mtb proteins in response to environmental cues.
Main Methods:
- Genetic screening to identify Mtb proteins involved in vesicle release.
- Characterization of a Mtb iniA mutant.
Main Results:
- Identified isoniazid-induced dynamin-like proteins IniA and IniC as critical for Mtb EV biogenesis.
- Demonstrated that Mtb EVs facilitate the export of bacterial components for host-microbe communication.
- Showcased that Mtb EVs can modulate the host immune response.
Conclusions:
- IniA and IniC are essential for Mtb EV production.
- Mtb EVs play a significant role in inter-kingdom communication and immune modulation.
- Targeting Mtb EV production offers a potential therapeutic strategy for tuberculosis.
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