Aeromonas sobria hemolysin causes diarrhea by increasing secretion of HCO3-

FEMS Microbiology Letters
Akira TakahashiYutaka Nakaya

Abstract

Aeromonas sobria hemolysin (ASH) is one of the major virulence factors produced by A. sobria, a causative agent of diarrhea in humans. We investigated the effects of ASH on anion transport in human colonic epithelial cells. ASH increased short circuit currents across the intestinal epithelia, which were suppressed by anion channel antagonists, such as carbonic anhydrase inhibitors, and by the removal of external HCO3-. Iliac fluid accumulation was also inhibited by carbonic anhydrase inhibitors. The results suggest that ASH activates HCO3- secretion, whose level correlates with the severity of diarrhea.

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Citations

Apr 17, 2013·Physiological Reviews·Mark D Parker, Walter F Boron

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