In Vitro and in Vivo Characterization of Helicobacter Hepaticus Cytolethal Distending Toxin Mutants

Overview

Journal Infect Immun

Publisher American Society for Microbiology

Specialty Allergy & Immunology

Date 2004 Apr 23

PMID 15102759

Citations 68

Authors

Vincent B Young

Kimberly A Knox

Jason S Pratt

Jennifer S Cortez

Linda S Mansfield

Arlin B Rogers

James G Fox

David B Schauer

Affiliations

Soon will be listed here.

Abstract

Helicobacter hepaticus expresses a member of the cytolethal distending toxin (CDT) family of bacterial cytotoxins. To investigate the role of CDT in the pathogenesis of H. hepaticus, transposon mutagenesis was used to generate a series of isogenic mutants in and around the cdtABC gene cluster. An H. hepaticus transposon mutant with a disrupted cdtABC coding region no longer produced CDT activity. Conversely, a transposon insertion outside of the cluster did not affect the CDT activity. An examination of these mutants demonstrated that CDT represents the previously described granulating cytotoxin in H. hepaticus. Challenge of C57BL/6 interleukin 10(-/-) mice with isogenic H. hepaticus mutants revealed that CDT expression is not required for colonization of the murine gut. However, a CDT-negative H. hepaticus mutant had a significantly diminished capacity to induce lesions in this murine model of inflammatory bowel disease.

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