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. 1997 Oct;179(20):6480–6487. doi: 10.1128/jb.179.20.6480-6487.1997

Clostridium perfringens epsilon-toxin acts on MDCK cells by forming a large membrane complex.

L Petit 1, M Gibert 1, D Gillet 1, C Laurent-Winter 1, P Boquet 1, M R Popoff 1
PMCID: PMC179566  PMID: 9335299

Abstract

Epsilon-toxin is produced by Clostridium perfringens types B and D and is responsible for a rapidly fatal enterotoxemia in animals, which is characterized by edema in several organs due to an increase in blood vessel permeability. The Madin-Darby canine kidney (MDCK) cell line has been found to be susceptible to epsilon-toxin (D. W. Payne, E. D. Williamson, H. Havard, N. Modi, and J. Brown, FEMS Microbiol. Lett. 116:161-168, 1994). Here we present evidence that epsilon-toxin cytotoxic activity is correlated with the formation of a large membrane complex (about 155 kDa) and efflux of intracellular K+ without entry of the toxin into the cytosol. Epsilon-toxin induced swelling, blebbing, and lysis of MDCK cells. Iodolabeled epsilon-toxin bound specifically to MDCK cell membranes at 4 and 37 labeled C and was associated with a large complex (about 155 kDa). The binding of epsilon-toxin to the cell surface was corroborated by immunofluorescence staining. The complex formed at 37 degrees C was more stable than that formed at 4 degrees C, since it was not dissociated by 5% sodium dodecyl sulfate and boiling.

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Selected References

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