Seyedeh Zahra Bakhti1, Saeid Latifi-Navid1, Shiva Mohammadi1, Saber Zahri1, Fatemeh Sadat Bakhti2, Farideh Feizi3, Abbas Yazdanbod4, Farideh Siavoshi5. 1. Department of Biology, Faculty of Sciences, University of Mohaghegh Ardabili, Ardabil, Iran. 2. Department of Biostatistics, Faculty of Public Health, Mazandaran University of Medical Sciences, Sari, Iran. 3. Aras Clinics, Imam Khomeini Hospital, Ardabil University of Medical Sciences, Ardabil, Iran. 4. Gastrointestinal Cancer Research Center, Ardabil University of Medical Sciences, Ardabil, Iran. 5. Department of Microbiology, School of Biology, University College of Sciences, University of Tehran, Tehran, Iran.
Abstract
BACKGROUND: Helicobacter pylori vacA genotypes play an important role in the pathogenesis of severe gastrointestinal disease. MATERIALS AND METHODS: We identified a novel polymorphic site in the 3'-end region of H. pylori vacA gene, denoted by c1/-c2 (c1: with deletion of 15 bp), and examined associations of this and the previous four sites as well as cagA status with gastroduodenal diseases, in a total of 217 Iranian H. pylori isolates. Histopathologic evaluations were performed and patients with gastric cancer (GC) were further classified based on the anatomic site of tumor, including cardia and noncardia GC, and the histopathologic type of tumor, including intestinal- and diffuse-type GC. RESULTS: The vacA m1, i1, d1, c1, and cagA genotypes were significantly associated with an increased risk of GC, the odds ratio (95% confidence interval) was 4.29 (2.03-9.08), 6.11 (2.63-14.19), 3.18 (1.49-6.76), 15.13 (5.86-39.01), and 2.59 (1.09-6.12), respectively. The vacA c1 genotype had an increased age- and sex-adjusted risk for GC by the multiple logistic regression analysis; the OR was 38.32 (95% CI, 6.60-222.29). This association was independent of and larger than the associations of the m-, i-, and d-type of vacA or cagA status with GC. No significant correlation was found between s1, whether independently or in combination, and the risk of GC or peptic ulcer disease (PUD). The vacA i1 and cagA genotypes were linked to an increased risk of PUD; the OR (95% CI) was 2.80 (1.45-5.40) and 2.62 (1.23-5.61), respectively. The presence of both the vacA i1 and cagA genotypes further increased the risk of PUD; the OR was 5.20 (95% CI, 1.92-14.03). CONCLUSION: The H. pylori vacA c1 genotype might therefore be one of the strongest risk predictors of GC in male patients aged ≥55 in Iran.
BACKGROUND:Helicobacter pylori vacA genotypes play an important role in the pathogenesis of severe gastrointestinal disease. MATERIALS AND METHODS: We identified a novel polymorphic site in the 3'-end region of H. pylori vacA gene, denoted by c1/-c2 (c1: with deletion of 15 bp), and examined associations of this and the previous four sites as well as cagA status with gastroduodenal diseases, in a total of 217 Iranian H. pylori isolates. Histopathologic evaluations were performed and patients with gastric cancer (GC) were further classified based on the anatomic site of tumor, including cardia and noncardia GC, and the histopathologic type of tumor, including intestinal- and diffuse-type GC. RESULTS: The vacA m1, i1, d1, c1, and cagA genotypes were significantly associated with an increased risk of GC, the odds ratio (95% confidence interval) was 4.29 (2.03-9.08), 6.11 (2.63-14.19), 3.18 (1.49-6.76), 15.13 (5.86-39.01), and 2.59 (1.09-6.12), respectively. The vacA c1 genotype had an increased age- and sex-adjusted risk for GC by the multiple logistic regression analysis; the OR was 38.32 (95% CI, 6.60-222.29). This association was independent of and larger than the associations of the m-, i-, and d-type of vacA or cagA status with GC. No significant correlation was found between s1, whether independently or in combination, and the risk of GC or peptic ulcer disease (PUD). The vacA i1 and cagA genotypes were linked to an increased risk of PUD; the OR (95% CI) was 2.80 (1.45-5.40) and 2.62 (1.23-5.61), respectively. The presence of both the vacA i1 and cagA genotypes further increased the risk of PUD; the OR was 5.20 (95% CI, 1.92-14.03). CONCLUSION: The H. pylori vacA c1 genotype might therefore be one of the strongest risk predictors of GC in male patients aged ≥55 in Iran.
Authors: Jacek Baj; Izabela Korona-Głowniak; Alicja Forma; Amr Maani; Elżbieta Sitarz; Mansur Rahnama-Hezavah; Elżbieta Radzikowska; Piero Portincasa Journal: Cells Date: 2020-04-23 Impact factor: 6.600