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Molecular characterization of the 128-kDa immunodominant antigen of Helicobacter pylori associated with cytotoxicity and duodenal ulcer.
Open accessAbstract
Helicobacter pylori has been associated with gastritis, peptic ulcer, and gastric adenocarcinoma. We report the nucleotide sequence and expression of an immunodominant antigen of H. pylori and the immune response to the antigen during disease. The antigen, named CagA (cytotoxin-associated gene A), is a hydrophilic, surface-exposed protein of 128 kDa produced by most clinical isolates. The size of the cagA gene and its protein varies in different strains by a mechanism that involves duplication of regions within the gene. Clinical isolates that do not produce the antigen do not have the gene and are unable to produce an active vacuolating cytotoxin. An ELISA to detect the immune response against a recombinant fragment of this protein detects 75.3% of patients with gastroduodenal diseases and 100% of patients with duodenal ulcer (P < 0.0005), suggesting that only bacteria harboring this protein are associated with disease.
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Citations
Cited by
Pathogenesis of Helicobacter pylori Infection
Kusters, J. G., van Vliet, A. H. M., & Kuipers, E. J. (2006) · Clinical Microbiology Reviews · doi:10.1128/cmr.00054-05 · Cited by 2,526
Helicobacter pylori Virulence and Genetic Geography
Covacci, A., Telford, J. L., Giudice, G. D., Parsonnet, J., & Rappuoli, R. (1999) · Science · doi:10.1126/science.284.5418.1328 · Cited by 1,049
Self-citationModelling human development and disease in pluripotent stem-cell-derived gastric organoids
McCracken, K. W., Catá, E. M., Crawford, C. M., Sinagoga, K. L., Schumacher, M., Rockich, B. E., Tsai, Y.-H., Mayhew, C. N., Spence, J. R., Zavros, Y., et al. (2014) · Nature · doi:10.1038/nature13863 · Cited by 980
Correa, P. (2013) · Gastroenterology Clinics of North America · doi:10.1016/j.gtc.2013.01.002 · Cited by 615
Berkes, J., Viswanathan, V. K., Savkovic, S. D., & Hecht, G. (2003) · Gut · doi:10.1136/gut.52.3.439 · Cited by 601
Metadata
- Authors
- Covacci, A., Censini, S., Bugnoli, M., Petracca, R., Burroni, D., Macchia, G., Massone, A., Papini, E., Xiang, Z., & Figura, N.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 1993-06-15
- Volume
- 90
- Issue
- 12
- Pages
- 5791-5795
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2062132676
- Cited by
- 1,248
- References
- 0
- FWCI
- 53.58
- Type
- journal article
- Language
- en
- Open access
- green
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- Covacci, A., Censini, S., Bugnoli, M., Petracca, R., Burroni, D., Macchia, G., Massone, A., Papini, E., Xiang, Z., & Figura, N. (1993). Molecular characterization of the 128-kDa immunodominant antigen of Helicobacter pylori associated with cytotoxicity and duodenal ulcer. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.90.12.5791
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