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06:44
Vibrio cholerae: Model Organism to Study Bacterial Pathogenesis - Interview
Published on: May 28, 2007
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A Modified ToxT Inhibitor Reduces Vibrio cholerae Virulence in Vivo
Anne K Woodbrey1, Evans O Onyango1, Gabriela Kovacikova2
1Department of Chemistry , Dartmouth College , Hanover , New Hampshire 03755 , United States.
Biochemistry
|August 31, 2018
Summary
New small-molecule inhibitors targeting ToxT effectively reduce Vibrio cholerae virulence. A potent indole derivative also inhibited intestinal colonization in infant mice, showing promise for cholera drug development.
Area of Science:
- Microbiology
- Medicinal Chemistry
- Drug Discovery
Background:
- Vibrio cholerae virulence is regulated by the transcription factor ToxT.
- Previous research identified bicyclic, fatty acid-like small-molecule inhibitors of ToxT.
- Development of novel antivirulence agents is crucial for combating cholera.
Purpose of the Study:
- To synthesize and evaluate novel derivatives of previously identified ToxT inhibitors.
- To assess the in vitro antivirulence activity of these new compounds.
- To determine the efficacy of the most potent compounds in a preclinical model of cholera.
Main Methods:
- Synthesis of bicyclic, fatty acid-like small-molecule derivatives.
- In vitro assessment of ToxT-mediated tcpA expression using a β-galactosidase assay.
- Evaluation of intestinal colonization in an infant mouse model.
Main Results:
- All synthesized derivatives demonstrated in vitro antivirulence activity against Vibrio cholerae.
- A concentration of 5 μM of the most potent compounds completely inhibited ToxT-mediated tcpA expression.
- One indole derivative, 3-(1-butyl-1H-indol-7-yl)propanoic acid (8), significantly inhibited intestinal colonization in infant mice.
Conclusions:
- Modified bicyclic, fatty acid-like inhibitors exhibit potent antivirulence activity.
- The indole derivative 3-(1-butyl-1H-indol-7-yl)propanoic acid shows preclinical efficacy.
- These compounds represent promising candidates for further anti-cholera drug development.
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