Preparation of procoligenoids from Escherichia coli heat-labile enterotoxins
نویسندگان
چکیده
منابع مشابه
Preparation of procoligenoids from Escherichia coli heat-labile enterotoxins.
Heat-labile enterotoxins from Escherichia coli strains of porcine and human origin polymerize on heating to form high-molecular-weight aggregates, "procoligenoids," analogous to procholeragenoid derived from the cholera enterotoxin. This aggregation is accompanied by loss of biological activity (toxicity). Further heating results in the release of B-subunit oligomers, coligenoids, analogous to ...
متن کاملAntigenic similarity of heat-labile enterotoxins from diverse strains of Escherichia coli.
With use of the rabbit intestinal loop model, heat-labile enterotoxins from 21 Escherichia coli strains isolated from a wide spectrum of patients with diarrheal diseases were all neutralized to high titer by two antisera prepared against enterotoxins of either E. coli or Vibrio cholerae. These findings suggest marked immunological similarity among heat-labile enterotoxins from a heterogenous gr...
متن کاملImmunological and physicochemical characterization of heat-labile enterotoxins isolated from two strains of Escherichia coli.
Heat-labile enterotoxins from Escherichia coli strains of human and porcine origins had identical subunit composition, arrangement, and size in sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Immunological differences recently described by others were shown to reside exclusively in the B subunits.
متن کاملImmunological study of the heat-labile enterotoxins of Escherichia coli and Vibrio cholerae.
Immunodiffusion experiments were conducted to associate a precipitin line with Escherichia coli heat-labile enterotoxin (LT). Wild strains of porcine and of human enteropathogenic E. coli as well as laboratory-derived enterotoxigenic variants of E. coli K-12 were used for LT antigen preparations. These were produced mainly by ultrafiltration and ammonium sulfate precipitation of broth culture s...
متن کاملConstruction and Expression of a Fused Gene for B Subunit of the Heat-Labile and a Truncated Form of the Heat-Stable Enterotoxins in Escherichia coli
Elaboration of different toxins by enterotoxigenic E. coli has been considered as one of the main virulence factors contributing to the manifestation of disease caused by these microorganisms. Various strategies have been employed to raise antibodies against these toxins as a line of defense. In this study, the 3’ terminus of the gene that codes for the binding subunit of the heat-labile entero...
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ژورنال
عنوان ژورنال: Infection and Immunity
سال: 1984
ISSN: 0019-9567,1098-5522
DOI: 10.1128/iai.45.2.518-521.1984