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Impaired intestinal stem cell activity in ETEC infection: enterotoxins, cyclic nucleotides, and Wnt signaling

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Abstract

Enterotoxigenic Escherichia coli (ETEC) in humans and animals colonizes the intestine and thereafter secrets heat-stable enterotoxin (ST) with or without heat-labile enterotoxin (LT), which triggers massive fluid and electrolyte secretion into the gut lumen. The crosstalk between the cyclic nucleotide-dependent protein kinase/cystic fibrosis transmembrane conductance regulator (cAMP or cGMP/CFTR) pathway involved in ETEC-induced diarrhea channels, and the canonical Wnt/β-catenin signaling pathway leads to changes in intestinal stem cell (ISC) fates, which are strongly associated with developmental disorders caused by diarrhea. We review how alterations in enterotoxin-activated ion channel pathways and the canonical Wnt/β-catenin signaling pathway can explain inhibited intestinal epithelial activity, characterize alterations in the crosstalk of cyclic nucleotides, and predict harmful effects on ISCs in targeted therapy. Besides, we discuss current deficits in the understanding of enterotoxin-intestinal epithelial cell activity relationships that should be considered when interpreting sequelae of diarrhea.

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Acknowledgements

This work was supported by the following: Basic and Applied Basic Research Foundation of Guangdong Province (2019B1515210021) and National Natural Science Foundation of China (31872389; 32072777).

Funding

This work was funded by Basic and Applied Basic Research Foundation of Guangdong Province (2019B1515210021) and National Natural Science Foundation of China (Grant Nos. 31872389, 32072777).

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Correspondence to Xiu-qi Wang.

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Ren, Ll., Zhou, Jy., Liang, Sj. et al. Impaired intestinal stem cell activity in ETEC infection: enterotoxins, cyclic nucleotides, and Wnt signaling. Arch Toxicol 96, 1213–1225 (2022). https://doi.org/10.1007/s00204-021-03213-x

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  • DOI: https://doi.org/10.1007/s00204-021-03213-x

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