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Regulation of Vibrio parahaemolyticus T3SS2 gene expression and function of T3SS2 effectors that modulate actin
Toshio Kodama1, Hirotaka Hiyoshi, Ryu Okada
1Pathogenic Microbes Repository Unit, International Research Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan.
Abstract:
Vibrio parahaemolyticus is a leading causative agent of seafood-borne gastroenteritis worldwide. Most clinical isolates from patients with diarrhoea possess two sets of genes for the type III secretion system (T3SS) on each chromosome (T3SS1 and T3SS2). T3SS is a protein secretion system that delivers effector proteins directly into eukaryotic cells. The injected effectors modify the normal cell functions by altering or disrupting the normal cell signalling pathways. Of the two sets of T3SS genes present in V. parahaemolyticus, T3SS2 is essential for enterotoxicity in several animal models. Recent studies have elucidated the biological activities of several T3SS2 effectors and their roles in virulence. This review focuses on the regulation of T3SS2 gene expression and T3SS2 effectors that specifically target the actin cytoskeleton.
Insights
Vibrio parahaemolyticus causes seafood illness using a type III secretion system (T3SS2). This system injects toxins that disrupt cell functions, particularly the actin cytoskeleton, contributing to disease.
Area of Science:
- Microbiology
- Molecular Biology
- Pathogenesis
Background:
- Vibrio parahaemolyticus is a major cause of seafood-borne gastroenteritis globally.
- Clinical isolates often possess two type III secretion systems (T3SS1 and T3SS2).
- T3SS2 is crucial for enterotoxicity in animal models.
Purpose of the Study:
- To review the regulation of T3SS2 gene expression in V. parahaemolyticus.
- To highlight T3SS2 effectors targeting the actin cytoskeleton.
- To understand the role of T3SS2 in V. parahaemolyticus virulence.
Main Methods:
- Literature review of existing studies on V. parahaemolyticus T3SS2.
- Analysis of research on effector protein functions.
- Focus on studies detailing T3SS2 gene regulation and actin cytoskeleton interactions.
Main Results:
- T3SS2 effectors are key virulence factors in V. parahaemolyticus.
- These effectors directly manipulate host cell functions.
- Specific T3SS2 components target and alter the actin cytoskeleton.
Conclusions:
- T3SS2 plays a critical role in V. parahaemolyticus pathogenesis.
- Understanding T3SS2 regulation and effector mechanisms is vital for combating seafood-borne illness.
- Targeting T3SS2 offers potential therapeutic strategies.
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