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Helicobacter pylori vacA genotypes and cagA gene in a series of 383 H. pylori-positive patients.
Z Gastroenterol. 2000 Jul; 38(7):559-64.ZG

Abstract

BACKGROUND

Only 10-15% of all patients infected with Helicobacter pylori develop peptic ulcer disease (PUD) or gastric cancer. Apart from immunological factors in the host, virulence determinants of H. pylori such as the vacuolating cytotoxin (VacA) or the cytotoxin-associated protein A (CagA) might represent a predisposition for the development of PUD.

METHODS

We studied antral biopsies of 383 H. pylori-positive patients with peptic ulcer disease (PUD) or other H. pylori-related diseases for H. pylori vacA genotypes and the presence of the cagA gene by PCR.

RESULTS

VacA genotypes and cagA status could be completely determined in 357 (93.2%) of the patients. In 91 (93.8%) of 97 patients with PUD, the vacA s1 genotype (s1m1, 45; s1m2, 46 patients) was present. The vacA s2m2 genotype was found in only 6 (6.2%) of 97 patients with PUD. In contrast, 180 (75.3%) of 239 patients (s1m1, 89; s1m2, 91 patients) without PUD and without gastric malignancies harbored strains with the vacA s1 genotype. The vacA genotype s2m2 was found in 59 (24.7%) of these patients. The presence of the cagA gene was closely associated with the vacA genotype s1 and found in 124 (88.6%) and in 113 (80.7%) of patients with the s1m1 or s1m2 genotypes, respectively, whereas strains with the genotype s2m2 were almost exclusively cagA negative.

CONCLUSION

Most H. pylori strains found in patients with PUD possess the vacA s1 genotype and the cagA gene. Patients with this type of H. pylori strain but without PUD might be at higher risk of developing PUD. In contrast, the risk for PUD might be significantly decreased in those patients who are infected by H. pylori strains with the vacA s2 genotype lacking the cagA gene.

Authors+Show Affiliations

Medizinische Klinik IV (Abteilung für Gastroenterologie), Ruprecht-Karls-Universität, Heidelberg. jochen_rudi@med.uni-heidelberg.deNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

10965552

Citation

Rudi, J, et al. "Helicobacter Pylori vacA Genotypes and cagA Gene in a Series of 383 H. Pylori-positive Patients." Zeitschrift Fur Gastroenterologie, vol. 38, no. 7, 2000, pp. 559-64.
Rudi J, Kuck D, Rudy A, et al. Helicobacter pylori vacA genotypes and cagA gene in a series of 383 H. pylori-positive patients. Z Gastroenterol. 2000;38(7):559-64.
Rudi, J., Kuck, D., Rudy, A., Sieg, A., Maiwald, M., & Stremmel, W. (2000). Helicobacter pylori vacA genotypes and cagA gene in a series of 383 H. pylori-positive patients. Zeitschrift Fur Gastroenterologie, 38(7), 559-64.
Rudi J, et al. Helicobacter Pylori vacA Genotypes and cagA Gene in a Series of 383 H. Pylori-positive Patients. Z Gastroenterol. 2000;38(7):559-64. PubMed PMID: 10965552.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Helicobacter pylori vacA genotypes and cagA gene in a series of 383 H. pylori-positive patients. AU - Rudi,J, AU - Kuck,D, AU - Rudy,A, AU - Sieg,A, AU - Maiwald,M, AU - Stremmel,W, PY - 2000/8/31/pubmed PY - 2000/10/21/medline PY - 2000/8/31/entrez SP - 559 EP - 64 JF - Zeitschrift fur Gastroenterologie JO - Z Gastroenterol VL - 38 IS - 7 N2 - BACKGROUND: Only 10-15% of all patients infected with Helicobacter pylori develop peptic ulcer disease (PUD) or gastric cancer. Apart from immunological factors in the host, virulence determinants of H. pylori such as the vacuolating cytotoxin (VacA) or the cytotoxin-associated protein A (CagA) might represent a predisposition for the development of PUD. METHODS: We studied antral biopsies of 383 H. pylori-positive patients with peptic ulcer disease (PUD) or other H. pylori-related diseases for H. pylori vacA genotypes and the presence of the cagA gene by PCR. RESULTS: VacA genotypes and cagA status could be completely determined in 357 (93.2%) of the patients. In 91 (93.8%) of 97 patients with PUD, the vacA s1 genotype (s1m1, 45; s1m2, 46 patients) was present. The vacA s2m2 genotype was found in only 6 (6.2%) of 97 patients with PUD. In contrast, 180 (75.3%) of 239 patients (s1m1, 89; s1m2, 91 patients) without PUD and without gastric malignancies harbored strains with the vacA s1 genotype. The vacA genotype s2m2 was found in 59 (24.7%) of these patients. The presence of the cagA gene was closely associated with the vacA genotype s1 and found in 124 (88.6%) and in 113 (80.7%) of patients with the s1m1 or s1m2 genotypes, respectively, whereas strains with the genotype s2m2 were almost exclusively cagA negative. CONCLUSION: Most H. pylori strains found in patients with PUD possess the vacA s1 genotype and the cagA gene. Patients with this type of H. pylori strain but without PUD might be at higher risk of developing PUD. In contrast, the risk for PUD might be significantly decreased in those patients who are infected by H. pylori strains with the vacA s2 genotype lacking the cagA gene. SN - 0044-2771 UR - https://www.unboundmedicine.com/medline/citation/10965552/Helicobacter_pylori_vacA_genotypes_and_cagA_gene_in_a_series_of_383_H__pylori_positive_patients_ L2 - http://www.thieme-connect.com/DOI/DOI?10.1055/s-2000-7449 DB - PRIME DP - Unbound Medicine ER -