Abstract
The gram negative, microaerophilic bacterium Helicobacter pylori colonizes the human gastric mucosa and establishes a chronic infection that is tightly associated with atrophic gastritis, peptic ulcer, and gastric carcinoma. Cloning of the H. pylori cytotoxin gene shows that the protein is synthesized as a 140-kD precursor that is processed to a 94-kD fully active toxin. Oral administration to mice of the purified 94-kD protein caused ulceration and gastric lesions that bear some similarities to the pathology observed in humans. The cloning of the cytotoxin gene and the development of a mouse model of human gastric disease will provide the basis for the understanding of H. pylori pathogenesis and the development of therapeutics and vaccines.
MeSH Terms
Amino Acid Sequence
Animals
Bacterial Proteins/genetics
Bacterial Toxins/genetics
Base Sequence
Cloning, Molecular
Cytotoxins/genetics
DNA, Bacterial
Disease Models, Animal
Helicobacter Infections/microbiology
Helicobacter pylori/genetics,pathogenicity
Humans
Immunoblotting
Mice
Mice, Inbred BALB C
Molecular Sequence Data
Peptide Fragments/genetics
Stomach Diseases/microbiology
Stomach Ulcer/microbiology
Chemicals
Bacterial Proteins
Bacterial Toxins
Cytotoxins
DNA, Bacterial
Peptide Fragments
VacA protein, Helicobacter pylori
Authors & Affiliations
10 authors, click to expand affiliations / ORCID
Telford J L
Department of Molecular Biology, Immunobiological Research Institute Siena, Italy.
Ghiara P
Dell'Orco M
Comanducci M
Burroni D
Bugnoli M
Tecce M F
Censini S
Covacci A
Xiang Z
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