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Ismaili, A. et al.

Alpha-actinin accumulation in epithelial cells infected with attaching and effacing gastrointestinal pathogens.

Fluorescent F-actin staining utilizing phalloidin, a highly toxic mushroom poison, is used as an indirect test to detect attaching and effacing (AE) bacteria. A study was done to determine if accumulation of alpha-actinin in infected tissue culture cells is a consistent feature and whether it corresponds with the AE response. Rearrangement of alpha-actinin was detected using immunofluorescence microscopy by incubation of infected cells with a murine monoclonal anti-alpha-actinin antibody. Foci of alpha-actinin-specific fluorescence corresponding to areas of bacterial adhesion were detected by transmission electron microscopy in HEp-2 and gastric KATO-III cells infected with only those bacterial strains that formed AE lesions. Therefore, this study shows that alpha-actinin accumulation is a consistent, specific manifestation of the AE phenotype and forms the basis for the development of a safe alternative test for detecting AE bacteria.[1]

References

Alpha-actinin accumulation in epithelial cells infected with attaching and effacing gastrointestinal pathogens. Ismaili, A., Philpott, D.J., Dytoc, M.T., Soni, R., Ratnam, S., Sherman, P.M. J. Infect. Dis. (1995) [Pubmed]

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