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- W2106204554 abstract "Enterotoxigenic Escherichia coli (ETEC) is responsible for 280 million to 400 million episodes of diarrhea and about 380,000 deaths annually. Epidemiological data suggest that ETEC strains which secrete heat-stable toxin (ST), alone or in combination with heat-labile toxin (LT), induce the most severe disease among children in developing countries. This makes ST an attractive target for inclusion in an ETEC vaccine. ST is released upon colonization of the small intestine and activates the guanylate cyclase C receptor, causing profuse diarrhea. To generate a successful toxoid, ST must be made immunogenic and nontoxic. Due to its small size, ST is nonimmunogenic in its natural form but becomes immunogenic when coupled to an appropriate large-molecular-weight carrier. This has been successfully achieved with several carriers, using either chemical conjugation or recombinant fusion techniques. Coupling of ST to a carrier may reduce toxicity, but further reduction by mutagenesis is desired to obtain a safe vaccine. More than 30 ST mutants with effects on toxicity have been reported. Some of these mutants, however, have lost the ability to elicit neutralizing immune responses to the native toxin. Due to the small size of ST, separating toxicity from antigenicity is a particular challenge that must be met. Another obstacle to vaccine development is possible cross-reactivity between anti-ST antibodies and the endogenous ligands guanylin and uroguanylin, caused by structural similarity to ST. Here we review the molecular and biological properties of ST and discuss strategies for developing an ETEC vaccine that incorporates immunogenic and nontoxic derivatives of the ST toxin." @default.
- W2106204554 created "2016-06-24" @default.
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- W2106204554 creator A5045149586 @default.
- W2106204554 creator A5058793391 @default.
- W2106204554 creator A5083946071 @default.
- W2106204554 date "2010-05-01" @default.
- W2106204554 modified "2023-10-05" @default.
- W2106204554 title "Heat-Stable Enterotoxin of Enterotoxigenic <i>Escherichia coli</i> as a Vaccine Target" @default.
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- W2106204554 doi "https://doi.org/10.1128/iai.01397-09" @default.
- W2106204554 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2863518" @default.
- W2106204554 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20231404" @default.
- W2106204554 hasPublicationYear "2010" @default.
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