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Toxins 2010, 2(7), 1848-1880; doi:10.3390/toxins2071848

The Enterotoxicity of Clostridium difficile Toxins

1
Tufts Cummings School of Veterinary Medicine, North Grafton, MA, 01536, USA
2
The University of Texas Medical Branch, Galveston, TX, 77555, USA
*
Author to whom correspondence should be addressed.
Received: 18 June 2010 / Revised: 23 June 2010 / Accepted: 9 July 2010 / Published: 14 July 2010
(This article belongs to the Special Issue Enterotoxins)
View Full-Text   |   Download PDF [247 KB, 15 July 2010; original version 14 July 2010]   |  

Abstract

The major virulence factors of Clostridium difficile infection (CDI) are two large exotoxins A (TcdA) and B (TcdB). However, our understanding of the specific roles of these toxins in CDI is still evolving. It is now accepted that both toxins are enterotoxic and proinflammatory in the human intestine. Both purified TcdA and TcdB are capable of inducing the pathophysiology of CDI, although most studies have focused on TcdA. C. difficile toxins exert a wide array of biological activities by acting directly on intestinal epithelial cells. Alternatively, the toxins may target immune cells and neurons once the intestinal epithelial barrier is disrupted. The toxins may also act indirectly by stimulating cells to produce chemokines, proinflammatory cytokines, neuropeptides and other neuroimmune signals. This review considers the mechanisms of TcdA- and TcdB-induced enterotoxicity, and recent developments in this field. View Full-Text
Keywords: Clostridium difficile; toxin A (TcdA); toxin B (TcdB); enterotoxicity Clostridium difficile; toxin A (TcdA); toxin B (TcdB); enterotoxicity
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Sun, X.; Savidge, T.; Feng, H. The Enterotoxicity of Clostridium difficile Toxins. Toxins 2010, 2, 1848-1880.

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