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How the Cholera Bacteria Becomes Infectious
Buried within ToxT, the researchers were surprised to find a fatty acid that appears to inhibit ToxT, which prevents the bacteria from causing cholera. Cholera, which causes acute diarrhea, can be life threatening, and, according to the World Health Organization, cholera remains a serious threat to global health.
Doctors have known that bile, found in the intestine, inhibits the expression of the virulence genes in V. cholerae, but until now, the mechanism behind this was not completely understood. This study provides a direct link between the environment of the gut and the regulation of virulence genes, and it also identifies the regulatory molecule.
"Finding a fatty acid in the structure was quite a surprise," says F. Jon Kull, associate professor of chemistry at Dartmouth and senior author on the paper. Kull is also a 1988 graduate of Dartmouth. "The exciting thing about this finding is that we might be able to use a small, natural molecule to treat and/or prevent cholera. We will also use the structure of the fatty acid as a framework to try and design a small molecule inhibitor of ToxT."
The study, "Structure of Vibrio cholerae ToxT reveals mechanism for fatty acid regulation of virulence genes," appeared in the online edition of the Proceedings of the National Academy of Sciences during the week of February 1.
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More News on: Cholera, Water Borne Diseases, Shigellosis, Botox, Amoebic Dysentery, MRSA - The Super Bug, Food Safety for Health
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