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Guzmán J, Castillo D, González-Siccha AD, Bussalleu A, Trespalacios-Rangel AA, Lescano AG, Sauvain M. Helicobacter pylori cagA, vacA, iceA and babA Genotypes from Peruvian Patients with Gastric Intestinal Metaplasia. Cancers (Basel) 2024; 16:1476. [PMID: 38672558 PMCID: PMC11047899 DOI: 10.3390/cancers16081476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 03/10/2024] [Accepted: 03/13/2024] [Indexed: 04/28/2024] Open
Abstract
We explored the clinical-stage association of gastric intestinal metaplasia (IM) compared to cases of chronic non-atrophic gastritis (CNAG) and its relationship with virulence genotypes of Helicobacter pylori (H. pylori) clinical isolates from patients with dyspepsia in Peru. This study was cross-sectional and included 158 H. pylori clinical isolates; each isolate corresponded to a different Peruvian patient, genotyped by polymerase chain reaction to detect cagA gene and EPIYA motifs, the vacA gene (alleles s1, s2, i1, i2, d1, d2, m1, m2 and subtypes s1a, s1b and s1c), the iceA gene (alleles 1 and 2), and the babA gene (allele 2). We observed that 38.6% presented with IM and that all clinical isolates were CagA positive. The EPIYA-ABC motif was predominant (68.4%), and we observed a high frequency for the vacA gene alleles s1 (94.9%), m1 (81.7%), i1 (63.9%), and d1 (70.9%). Strains with both iceA alleles were also detected (69.6%) and 52.2% were babA2 positive. In addition, it was observed that the cagA+/vacAs1m1 (PR: 2.42, 1.14 to 5.13, p < 0.05) and cagA+/vacAs1am1 (PR: 1.67, 1.13 to 2.45, p < 0.01) genotypes were associated with IM. Our findings revealed the cagA and vacA risk genotypes predominance, and we provided clinically relevant associations between Peruvian patients with H. pylori infection and IM clinical stage.
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Affiliation(s)
- Jesús Guzmán
- Laboratorio Centinela de Helicobacter pylori, Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 15024, Peru; (D.C.); (A.B.); (M.S.)
- Facultad de Salud Pública y Administración, Universidad Peruana Cayetano Heredia, Lima 15102, Peru;
| | - Denis Castillo
- Laboratorio Centinela de Helicobacter pylori, Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 15024, Peru; (D.C.); (A.B.); (M.S.)
| | - Anabel D. González-Siccha
- Departamento de Bioquímica, Facultad de Farmacia y Bioquímica, Universidad Nacional de Trujillo, Trujillo 13011, Peru;
| | - Alejandro Bussalleu
- Laboratorio Centinela de Helicobacter pylori, Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 15024, Peru; (D.C.); (A.B.); (M.S.)
| | - Alba A. Trespalacios-Rangel
- Grupo de Investigación en Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá 110231, Colombia;
| | - Andres G. Lescano
- Facultad de Salud Pública y Administración, Universidad Peruana Cayetano Heredia, Lima 15102, Peru;
| | - Michel Sauvain
- Laboratorio Centinela de Helicobacter pylori, Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 15024, Peru; (D.C.); (A.B.); (M.S.)
- UMR 152 Pharmacochimie et Biologie pour le Développement (PHARMA-DEV), Institut de Recherche pour le Développement (IRD), Université de Toulouse, CEDEX 9, 31062 Toulouse, France
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Bai D, Liu K, Wang R, Zhang WH, Chen XZ, Hu JK. Prevalence Difference of Helicobacter pylori Infection Between Tibetan and Han Ethnics in China: A Meta-analysis on Epidemiologic Studies (SIGES). Asia Pac J Public Health 2022; 35:103-111. [PMID: 36321513 DOI: 10.1177/10105395221134651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
China is a multi-ethnic country, and the prevalence of Helicobacter pylori ( H pylori) infection may be diverse among ethnics. This meta-analysis was conducted to compare the prevalence of H pylori infection between Tibetans and Han ethnics. Ten studies that reported the prevalence of H pylori infection between Tibetans and Hans in China were eligible. The pooled prevalence of H pylori infection was 62.2% versus 55.3% among Tibetans and Hans, respectively. Tibetans had a higher risk of H pylori infection than Hans (odds ratio [OR] = 1.38, 95% confidence interval [CI] [1.05, 1.80]). In subgroup analysis, Tibetans with upper gastrointestinal symptoms (OR = 1.51, 95% CI [1.06-2.16]), inhabiting in Tibet (OR = 1.51, 95% CI [1.22, 1.87]), or inhabiting in Northwestern region (OR = 1.15, 95% CI [1.00, 1.31]) had significantly higher risks of H pylori infection. In addition, in the recent 10 years, Hans showed a decreased risk of H pylori infection (OR = 1.81, 95% CI [1.42, 2.30]). Heterogeneity was common, while sensitivity analyses showed partially inconsistent results against main findings. This study demonstrated higher prevalence of H pylori infection in Tibetans compared with Hans, especially in recent years, or in Tibet and northwest China, as well as symptomatic Tibetans. The results suggest tailored strategy and robustness need to be further considered for H pylori screening and eradication among Tibetans.
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Affiliation(s)
- Dan Bai
- Gastric Cancer Center and Laboratory of Gastric Cancer, West China Hospital, Sichuan University, Chengdu, China
| | - Kai Liu
- Gastric Cancer Center and Laboratory of Gastric Cancer, West China Hospital, Sichuan University, Chengdu, China
| | - Rui Wang
- Department of Gastroenterology, Nursing Section, West China Hospital, Sichuan University, Chengdu, China
| | - Wei-Han Zhang
- Gastric Cancer Center and Laboratory of Gastric Cancer, West China Hospital, Sichuan University, Chengdu, China
| | - Xin-Zu Chen
- Gastric Cancer Center and Laboratory of Gastric Cancer, West China Hospital, Sichuan University, Chengdu, China
- Department of Gastrointestinal and Hernia Surgery, Second People’s Hospital of Yibin, West China Yibin Hospital, Yibin, China
| | - Jian-Kun Hu
- Gastric Cancer Center and Laboratory of Gastric Cancer, West China Hospital, Sichuan University, Chengdu, China
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Association of the Helicobacter pylori cagA, vacA, and iceA genotypes with chronic follicular gastritis in a Colombian population at high risk for gastric cancer. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO (ENGLISH EDITION) 2019. [DOI: 10.1016/j.rgmxen.2018.03.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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Román-Román A, Martínez-Santos VI, Castañón-Sánchez CA, Albañil-Muñoz AJ, González-Mendoza P, Soto-Flores DG, Martínez-Carrillo DN, Fernández-Tilapa G. CagL polymorphisms D58/K59 are predominant in Helicobacter pylori strains isolated from Mexican patients with chronic gastritis. Gut Pathog 2019; 11:5. [PMID: 30805032 PMCID: PMC6373039 DOI: 10.1186/s13099-019-0286-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 02/05/2019] [Indexed: 12/21/2022] Open
Abstract
Background Helicobacter pylori is a Gram-negative bacterium that colonizes the gastric mucosa in humans. One of the main virulence factors of H. pylori is the cag pathogenicity island (cagPAI), which encodes a type 4-secretion system (T4SS) and the cytotoxin CagA. Translocation of CagA through the T4SS triggers host-signaling pathways. One of the T4SS proteins is CagL, which is necessary for CagA translocation. CagL is a 26-kDa protein that contains a hypervariable motif, which spans residues 58 to 62. Several polymorphisms in this region have been associated with different disease outcomes, e.g. in Mexico, N58 is associated with a higher risk of gastric cancer. The aim of this work is to analyze the sequence of the hypervariable motif (residues 58 to 62) of clinical isolates from Mexican patients with chronic gastritis, and to correlate these polymorphisms with the vacA genotype. Results Of the 164 biopsies analyzed, only 30.5% (50/164) were positive for H. pylori. Thirty-six of the 50 clinical isolates (72%) were cagA positive, and 40 (80%) had the most virulent vacA genotype (s1/m1). Of the cagA positive strains, 94.4% were vacA s1/m1. All the cagA+ strains contained the cagL gene. The most prevalent sequence in the polymorphic region (residues 58–62) was DKMGE (75.8%, 25/33), followed by NKMGQ and NEIGQ (6.1%, 2/33), and DEIGQ, NKMGE, DKIGE, and DKIGK (3%, 1/33). Regarding polymorphisms in positions 58 and 59, the most common were D58/K59 (81.8%, 27/33), followed by N58/K59 (9.1%, 3/33), and D58/E59 (3%, 1/33). Only two isolates (6.1%) contained residues N58/E59, which correspond to those found in H. pylori strain ATCC 26695. 92.6% of the clinical isolates having polymorphism D58/K59 had the genotype vacA s1/m1, considered to be the most virulent, while 7.4% had the genotypes vacA s1/m2 and s2/m2. Conclusions In Mexican patients, CagL polymorphisms D58, K59, M60, E62, K122, and I134 are more common in patients with chronic gastritis.
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Affiliation(s)
- Adolfo Román-Román
- 1Laboratorio de Investigación en Bacteriología, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Av. Lázaro Cárdenas s/n C.U. Sur., C.P. 39090 Chilpancingo, Guerrero Mexico
| | - Verónica I Martínez-Santos
- 2Universidad Autónoma de Guerrero, Av. Javier Méndez Aponte No. 1, Fracc. 10, Col. Servidor Agrario, C.P. 39070 Chilpancingo, Guerrero Mexico
| | - Carlos A Castañón-Sánchez
- Hospital Regional de Alta Especialidad de Oaxaca, Aldama s/n, Col. Centro, C.P. 71256 San Bartolo Coyotepec, Oaxaca Mexico
| | - Alan J Albañil-Muñoz
- 4Laboratorio de Investigación Clínica, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Av. Lázaro Cárdenas s/n C.U. Sur., C.P. 39090 Chilpancingo, Guerrero Mexico
| | - Paola González-Mendoza
- 4Laboratorio de Investigación Clínica, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Av. Lázaro Cárdenas s/n C.U. Sur., C.P. 39090 Chilpancingo, Guerrero Mexico
| | - Diana G Soto-Flores
- 4Laboratorio de Investigación Clínica, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Av. Lázaro Cárdenas s/n C.U. Sur., C.P. 39090 Chilpancingo, Guerrero Mexico
| | - Dinorah N Martínez-Carrillo
- 4Laboratorio de Investigación Clínica, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Av. Lázaro Cárdenas s/n C.U. Sur., C.P. 39090 Chilpancingo, Guerrero Mexico
| | - Gloria Fernández-Tilapa
- 4Laboratorio de Investigación Clínica, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Av. Lázaro Cárdenas s/n C.U. Sur., C.P. 39090 Chilpancingo, Guerrero Mexico
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Del Moral-Hernández O, Castañón-Sánchez CA, Reyes-Navarrete S, Martínez-Carrillo DN, Betancourt-Linares R, Jiménez-Wences H, de la Peña S, Román-Román A, Hernández-Sotelo D, Fernández-Tilapa G. Multiple infections by EBV, HCMV and Helicobacter pylori are highly frequent in patients with chronic gastritis and gastric cancer from Southwest Mexico: An observational study. Medicine (Baltimore) 2019; 98:e14124. [PMID: 30653141 PMCID: PMC6370051 DOI: 10.1097/md.0000000000014124] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The chronic inflammation and damage to the gastric epithelium induced by Helicobacter pylori (H. pylori) are the main risk factors for gastric cancer development. Epstein-Barr virus (EBV) and human cytomegalovirus (HCMV) induce chronic inflammation and have been found in gastric tumors. The objectives this observational study were to determine the frequency of multiple infections by Helicobacter pylori, Epstein-Barr virus (EBV) and human cytomegalovirus (HCMV) and to relate the infection by EBV and HCMV with H. pylori vacA/cagA genotypes in patients with chronic gastritis or gastric cancer. DNA from H. pylori, EBV and HCMV was detected by PCR in biopsies from 106 Mexican patients with chronic gastritis and 32 from gastric cancer. The cagA status and the vacA genotypes of H. pylori were determined by PCR. In chronic gastritis and gastric cancer EBV was found in 69.8% and 87.5%, HCMV in 52.8% and 53.1%, and H. pylori in 48.1% and 40.6%, respectively. In chronic gastritis, 53% of H. pylori patients were EBV and 33% were both EBV/HCMV; in gastric cancer, 92.3% of H. pylori-infected individuals were EBV and 46.1% were EVB/HCMV. All the intestinal- and mixed-type tumors and the 83.3% of diffuse-type tumors were EBV. No significant differences were found between single infections or coinfections with the diagnosis or the cancer type. The H. pylori genotypes were not related to EBV or HCMV infection. The frequency of dual infections by H. pylori, EBV and HCMV is higher in patients from southwest Mexico than other populations. It is likely that these pathogens act synergistically to induce inflammation and gastric cancer.
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Affiliation(s)
- Oscar Del Moral-Hernández
- Laboratory of Virology and Epigenetics of Cancer, Faculty of Chemical-Biological Sciences, Autonomous University of Guerrero, Chilpancingo, Guerrero
| | | | | | | | | | - Hilda Jiménez-Wences
- Laboratory of Clinical Research, Faculty of Chemical-Biological Sciences, Autonomous University of Guerrero
| | - Sol de la Peña
- Postdoctoral Fellow CONACYT in Laboratory of Clinical Research, Faculty of Chemical-Biological Sciences, Autonomous University of Guerrero
| | - Adolfo Román-Román
- Laboratory of Bacteriology Research, Faculty of Chemical-Biological Sciences, Autonomous University of Guerrero, Chilpancingo, Guerrero, Mexico
| | - Daniel Hernández-Sotelo
- Laboratory of Virology and Epigenetics of Cancer, Faculty of Chemical-Biological Sciences, Autonomous University of Guerrero, Chilpancingo, Guerrero
| | - Gloria Fernández-Tilapa
- Laboratory of Clinical Research, Faculty of Chemical-Biological Sciences, Autonomous University of Guerrero
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Lian DW, Xu YF, Ren WK, Fu LJ, Chen FJ, Tang LY, Zhuang HL, Cao HY, Huang P. Unraveling the Novel Protective Effect of Patchouli Alcohol Against Helicobacter pylori-Induced Gastritis: Insights Into the Molecular Mechanism in vitro and in vivo. Front Pharmacol 2018; 9:1347. [PMID: 30524287 PMCID: PMC6262355 DOI: 10.3389/fphar.2018.01347] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Accepted: 10/31/2018] [Indexed: 12/18/2022] Open
Abstract
Patchouli alcohol (PA), a natural tricyclic sesquiterpene extracted from Pogostemon cablin (Blanco) Benth. (Labiatae), has been found to exhibit anti-Helicobacter pylori and anti-inflammatory properties. In this study, we investigated the protective effect of PA against H. pylori-induced gastritis in vitro and in vivo, and determined the underlying mechanism. In the in vivo experiment, a C57BL/6 mouse model of gastritis was established using H. pylori SS1, and treatments with standard triple therapy or 5, 10, and 20 mg/kg PA were performed for 2 weeks. Results indicated that PA effectively attenuated oxidative stress by decreasing contents of intracellular reactive oxygen species (ROS) and malonyldialdehyde (MDA), and increasing levels of non-protein sulfhydryl (NP-SH), catalase and glutathione (GSH)/glutathione disulphide (GSSG). Additionally, treatment with PA significantly attenuated the secretions of interleukin 1 beta (IL-1β), keratinocyte chemoattractant and interleukin 6 (IL-6). PA (20 mg/kg) significantly protected the gastric mucosa from H. pylori-induced damage. In the in vitro experiment, GES-1 cells were cocultured with H. pylori NCTC11637 at MOI = 100:1 and treated with different doses of PA (5, 10, and 20 μg/ml). Results indicated that PA not only significantly increased the cell viability and decreased cellular lactate dehydrogenase (LDH) leakage, but also markedly elevated the mitochondrial membrane potential and remarkably attenuated GES-1 cellular apoptosis, thereby protecting gastric epithelial cells against injuries caused by H. pylori. PA also inhibited the secretions of pro-inflammatory factors, such as monocyte chemotactic protein 1 (MCP-1), tumor necrosis factor-α (TNF-α) and IL-6. Furthermore, after PA treatment, the combination of NACHT, LRR, and PYD domains-containing protein 3 (NLRP3) and cysteine-aspartic proteases 1 (CASPASE-1), the expression levels of NLRP3 inflammasome-related proteins, such as thioredoxin-interacting protein (TXNIP), pro-CASPASE-1, cle-CASPASE-1, and NLRP3 and genes (NLRP3 and CASPASE1) were significantly decreased as compared to the model group. In conclusion, treatment with PA for 2 weeks exhibited highly efficient protective effect against H. pylori-induced gastritis and related damages. The underlying mechanism might involve antioxidant activity, inhibition of pro-inflammatory factor and regulation of NLRP3 inflammasome function. PA exerted anti-H. pylori and anti-gastritis effects and thus had the potential to be a promising candidate for treatment of H. pylori-related diseases.
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Affiliation(s)
- Da-Wei Lian
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yi-Fei Xu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Wen-Kang Ren
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Li-Jun Fu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Fang-Jun Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Li-Yao Tang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Hui-Ling Zhuang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Hong-Ying Cao
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Ping Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
- Dongguan & Guangzhou University of Chinese Medicine Cooperative Academy of Mathematical Engineering for Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
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Carlosama-Rosero YH, Bolaños-Bravo H, Sierra-Tórres CH, Rosero EA. Association of the Helicobacter pylori cagA, vacA, and iceA genotypes with chronic follicular gastritis in a Colombian population at high risk for gastric cancer. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2018; 84:158-164. [PMID: 29778309 DOI: 10.1016/j.rgmx.2018.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Accepted: 03/27/2018] [Indexed: 12/20/2022]
Abstract
INTRODUCTION AND OBJECTIVE Follicular gastritis is associated with Helicobacter pylori infection, but little is known of its relation to bacterial genotypes. Our aim was to establish the relation between follicular gastritis and different H. pylori strains. MATERIALS AND METHODS An analytic case-control study was conducted that included 36 patients with follicular gastritis (cases) and 83 with nonatrophic gastritis (controls). The sociodemographic information was obtained through a questionnaire. Biopsies were evaluated according to the Sydney System and the Wotherspoon scoring system. Helicobacter pylori genotyping was performed using the polymerase chain reaction technique. The quantitative variables were presented as mean and standard deviation and the qualitative variables as proportions and absolute frequency. The effect of each variable on outcome (follicular gastritis) was evaluated through the odds ratio and its 95% confidence interval. Statistical significance was set at a P<0.05. RESULTS Follicular gastritis was associated with Helicobacter pylori infection (OR: 13.41, CI: 1.7-103, P=0.01). The CagA+ genotype was present in 56.5% of the cases and 58% of the controls. The cytotoxic VacAs1m1strain was present in 82% of the isolates in both groups. IceA1 frequency was 34.8% in the cases and 26% in the controls and the difference was not statistically significant. CONCLUSIONS The population studied had elevated frequencies of cytotoxic Helicobacter pylori strains and the iceA1 genotype was more frequent in follicular gastritis.
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Affiliation(s)
- Y H Carlosama-Rosero
- Especialista en Anatomía Patológica, Magister en Epidemiología, Grupo Interdisciplinario de Investigación en Salud-Enfermedad, Profesor Universidad Cooperativa de Colombia, Pasto, Colombia.
| | - H Bolaños-Bravo
- Especialista en Anatomía Patológica, Magister en Oncología Molecular, Grupo de Investigación en Genética Humana y Aplicada, Universidad del Cauca, Popayán, Colombia
| | - C H Sierra-Tórres
- Biólogo, PhD en Epidemiología Molecular, Grupo de Investigación en Genética Humana y Aplicada, Universidad del Cauca, Popayán, Colombia
| | - E A Rosero
- Especialista Salud Ocupacional. Universidad Cooperativa de Colombia, Pasto, Colombia
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Hamada M, Elbehiry A, Marzouk E, Moussa IM, Hessain AM, Alhaji JH, Heme HA, Zahran R, Abdeen E. Helicobacter pylori in a poultry slaughterhouse: Prevalence, genotyping and antibiotic resistance pattern. Saudi J Biol Sci 2018; 25:1072-1078. [PMID: 30174504 PMCID: PMC6117242 DOI: 10.1016/j.sjbs.2018.02.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 01/02/2018] [Accepted: 02/01/2018] [Indexed: 01/01/2023] Open
Abstract
Although Helicobacter pylori (H. pylori) is a highly significant pathogen, its source remains unclear. Many people consume chicken daily as a source of animal protein worldwide; thus, hygienic methods of supplying chickens for consumption are critical for public health. Therefore, our study examined the distribution of the glmM (ureC), babA2, vacA and cagA virulence genes in H. pylori strains in chicken meat and giblets (gizzards and livers) and the resistance of the strains to various antibiotics. Ninety chicken meat, gizzard and liver samples were obtained from a semi-automatic abattoir in Sadat City, Egypt, and were cultured and preliminarily analyzed using biochemical tests. The presence of the ureC, babA2, vacA and cagA genotypes was tested for in samples positive for H. pylori by multiplex polymerase chain reaction (Multiplex-PCR). The resistance of H. pylori to various antimicrobial drugs was tested using the disc diffusion method. In total, 7 of the 90 chicken samples were positive for H. pylori (7.78%); in 3/7 (42.85%) samples, the bacteria were found in the chicken liver, while the bacteria were found in the meat in 2/7 (28.57%) and in the gizzard in 2/7 (28.57%) samples. The total prevalence of both the ureC and babA2 genes in the isolated H. pylori strains was 100%, while the prevalence of the vacA and cagA genes was 57.1% and 42.9%, respectively. The resistance of H. pylori to the antibiotics utilized in our study was 100% for streptomycin; 85.7% for amoxicillin and penicillin; 71.4% for oxytetracycline, nalidixic acid and ampicillin; 57.1% for sulfamethoxazole and erythromycin; and 42.9% for neomycin, chloramphenicol and norfloxacin. In conclusion, the chicken meat and giblets were tainted by H. pylori, with a higher occurrence of the ureC, babA2, vacA and cagA genotypes. Future investigations should investigate the resistance of H. pylori to various antimicrobial agents in Egypt.
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Affiliation(s)
- Mohamed Hamada
- Department of Food Hygiene & Control, Faculty of Veterinary Medicine, Sadat City University, Egypt
| | - Ayman Elbehiry
- Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Sadat City University, Egypt.,Department of Public Health, College of Public Health and Health Informatics, Qassim University, Saudi Arabia
| | - Eman Marzouk
- Department of Medical Laboratories, College of Applied Medical Science, Qassim University, Saudi Arabia
| | - Ihab M Moussa
- Department of Botany and Microbiology, College of Science, King Saud University, Saudi Arabia
| | - Ashgan Mohamed Hessain
- Department of Health Science, College of Applied Studies and Community Service, King Saud University, P. O. Box 22459, Riyadh 11495, Saudi Arabia
| | - Jwaher Haji Alhaji
- Department of Health Science, College of Applied Studies and Community Service, King Saud University, P. O. Box 22459, Riyadh 11495, Saudi Arabia
| | - Hassan A Heme
- Department of Medical Technology/Microbiology, College of Applied Medical Science, Taibah University, Madinah, Saudi Arabia
| | - Rasha Zahran
- Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Sadat City University, Egypt
| | - Eman Abdeen
- Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Sadat City University, Egypt
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Atrisco-Morales J, Martínez-Santos VI, Román-Román A, Alarcón-Millán J, De Sampedro-Reyes J, Cruz-Del Carmen I, Martínez-Carrillo DN, Fernández-Tilapa G. vacA s1m1 genotype and cagA EPIYA-ABC pattern are predominant among Helicobacter pylori strains isolated from Mexican patients with chronic gastritis. J Med Microbiol 2018; 67:314-324. [PMID: 29458667 PMCID: PMC5882077 DOI: 10.1099/jmm.0.000660] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Purpose Virulent genotypes of Helicobacter pylori vacA s1m1/cagA+/babA2+ have been associated with severe gastric diseases. VacA, CagA and BabA are polymorphic proteins, and their association with the disease is allele-dependent. The aims of this work were: (i) to determine the prevalence of H. pylori by type of chronic gastritis; (ii) to describe the frequency of cagA, babA2 and vacA genotypes in strains from patients with different types of chronic gastritis; (iii) to characterize the variable region of cagA alleles. Methodology A total of 164 patients with chronic gastritis were studied. Altogether, 50 H. pylori strains were isolated, and the status of cagA, babA2 and vacA genotypes was examined by PCR. cagA EPIYA segment identification was performed using PCR and sequencing of cagA fragments of six randomly selected strains. Results/Key findings The overall prevalence of H. pylori was 30.5 %. Eighty percent of the isolated strains were vacA s1m1, and the cagA and babA2 genes were detected in 74 and 32 % of the strains, respectively. The most frequent genotypes were vacA s1m1/cagA+/babA2- and vacA s1m1/cagA+/babA2+, with 40 % (20/50) and 28 % (14/50), respectively. In cagA+, the most frequent EPIYA motif was -ABC (78.4 %), and EPIYA-ABCC and -ABCCC motifs were found in 10.8 % of the strains. A modified EPIYT-B motif was found in 66.6 % of the sequenced strains. Conclusion H. pylori strains carrying vacA s1m1, cagA+ and babA2- genotypes were the most prevalent in patients with chronic gastritis from the south of Mexico. In the cagA+ strains, the EPIYA-ABC motif was the most common.
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Affiliation(s)
- Josefina Atrisco-Morales
- Laboratorio de Investigación Clínica, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Av. Lázaro Cárdenas s/n C.U. Sur. Chilpancingo, Guerrero, C.P. 39090, Mexico
| | - Verónica I Martínez-Santos
- CONACYT Research Fellow- Universidad Autónoma de Guerrero, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Guerrero, Mexico
| | - Adolfo Román-Román
- Laboratorio de Investigación en Bacteriología, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Guerrero, Mexico
| | - Judit Alarcón-Millán
- Laboratorio de Investigación en Bacteriología, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Guerrero, Mexico
| | | | | | - Dinorah N Martínez-Carrillo
- Laboratorio de Investigación Clínica, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Av. Lázaro Cárdenas s/n C.U. Sur. Chilpancingo, Guerrero, C.P. 39090, Mexico
| | - Gloria Fernández-Tilapa
- Laboratorio de Investigación Clínica, Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Av. Lázaro Cárdenas s/n C.U. Sur. Chilpancingo, Guerrero, C.P. 39090, Mexico
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The Prevalence of Helicobacter pylori Virulence Related Genes (hpa and babA2) in Iranian Patients with Gastrointestinal Disorders. Jundishapur J Microbiol 2017. [DOI: 10.5812/jjm.60947] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Pandya HB, Agravat HH, Patel JS. Prevalence of Specific Helicobacter PyloricagA, vacA, iceA, ureC Genotypes and its Clinical Relevance in the Patients with Acid-Peptic Diseases. J Clin Diagn Res 2017; 11:DC23-DC26. [PMID: 28969123 DOI: 10.7860/jcdr/2017/27812.10457] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 06/16/2017] [Indexed: 01/14/2023]
Abstract
INTRODUCTION Virulent markers of H. pylori, the vacuolating cytotoxin (vacA), cytotoxin-associated gene A (cagA), induced by contact with epithelium factor antigen (iceA gene) and the urease C gene (ureC) may plays a major role in determining the clinical outcome of Helicobacter infections. AIM To detect the prevalence of the cagA, vacA, ureC and iceA genotypes of H. pylori from antral biopsy specimens of patients and to associate its role in specific disease. MATERIALS AND METHODS The study was conducted at Department of Microbiology of Shree P.M. Patel College of Paramedical Sciences, Anand, Gujarat, India. Seventy one antral biopsies of symptomatic patients referred for endoscopy from October 2012 to September 2013 were subjected to Multiplex PCR. DNA isolation from 71 biopsy samples was done by using "QIAamp DNA mini kit" from QIAGEN (GmbH, Hilden, Germany). Data was analysed using Chi square (χ2) test and p-value<0.05 was considered significant. RESULTS Out of the 71 biopsies screened, 22(31%) samples were positive for H. pylori by PCR, with high proportion of cagA positive (17/22 specimen; 77.27%), followed by ureC positive (4/22 specimen; 18.18%) and vacA positive (1/22 specimen; 4.54%) strains. Significant association was found between cagA and female gender (p-value=0.042). Out of 17 cagA positive strains, 9(52.94%) were found in patients with gastritis, 5(29.41%) in reflux oesophagitis and 3(17.64%) in patients with diodenal ulcer. We found 0% prevalence of iceA gene; conversely we had three peptic ulcer patients with only cagA positivity. CONCLUSION The cagA positive strain mainly affects the patients with gastritis specifically of female gender and iceA genotype is not a useful marker associated with peptic ulcer disease. Patients should be screened for cagA genotype when reported to be a case of gastritis for early treatment to prevent further complications such as cancer.
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Affiliation(s)
- Himani Bhardwaj Pandya
- Tutor, Department of Microbiology, SBKS Medical Institute and Research Center, Vadodara, Gujarat, India
| | - Harihar Hardas Agravat
- Dean, Department of Microbiology, Gujarat Adani Institute of Medical Sciences, Bhuj, Gujarat, India
| | - Jagdish Shantilal Patel
- Head, Department of Biochemistry, P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology (CHARUSAT), Changa, Gujarat, India
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12
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Medina ML, Medina MG, Merino LA. Correlation between virulence markers of Helicobacter pylori in the oral cavity and gastric biopsies. ARQUIVOS DE GASTROENTEROLOGIA 2017; 54:217-221. [PMID: 28724047 DOI: 10.1590/s0004-2803.201700000-24] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Accepted: 03/27/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND: The clinical outcome of Helicobacter pylori infection has been associated with virulence factors. The presence of these factors is useful as molecular markers in the identification of the high risk for developing severe gastric pathologies. OBJECTIVE: To correlate the presence of virulence markers cagA and bab2A of H. pylori in oral and gastric biopsy samples. METHODS: An observational, prospective, descriptive, and cross-sectional study was carried out between September 2011 and September 2012. Patients suffering dyspepsia with indication for upper gastrointestinal video endoscopy who attended the Gastroenterology Service of the Hospital Dr. Julio C. Perrando were included. Epidemiological investigation was completed. To detect the bacteria and their virulence genes, samples of saliva, dental plaque and gastric biopsy were taken and processed by PCR. RESULTS: Sixty-one patients were selected for this study (30 women and 31 men). H. pylori was detected in 31 gastric biopsies and 31 oral samples. Significant difference between oral and gastric samples was found in cagA genotype. Agreement between oral and gastric genotypes was found in 38.7% of samples from the same patient. CONCLUSION: This study is the first in provide information about the genotypes of the Argentinean Northeast H. pylori strains. Despite the high prevalence of H. pylori infection, the most of patients had less virulent genotypes in oral cavity and gastric tissue. The cagA / babA2 combination was not frequent in the samples studied. There was not a statistical correlation between the virulence genes and gastroduodenal or oral diseases. Although in some patients the same genotype was found both in oral and gastric samples, it cannot be ensure that they corresponding to the same strain because a DNA sequencing was not performed.
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Affiliation(s)
- Myriam Lucrecia Medina
- Unidad de Investigación, Hospital Pediátrico Dr. Avelino Castelán, Resistencia, Argentina
| | - Marcelo Gabriel Medina
- Area de Medicina Tropical, Instituto de Medicina Regional, Universidad Nacional del Nordeste, Resistencia, Argentina
| | - Luis Antonio Merino
- Area de Bacteriología, Instituto de Medicina Regional, Universidad Nacional del Nordeste, Resistencia, Argentina
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13
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Jalilian S, Alvandi A, Jouybari TA, Pajavand H, Abiri R. Lack of association association between the presence of dupA and babA 2 genes in Helicobacter pylori and gastroduodenal disorders. MOLECULAR GENETICS MICROBIOLOGY AND VIROLOGY 2017. [DOI: 10.3103/s0891416817010074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Sohrabi M, Khashei R, Alizadeh M, Asl MKH, Nejati MA, Dara M, Bazargani A. Low Rate of babA2 Genotype among Iranian Helicobacter pylori Clinical Isolates. J Clin Diagn Res 2017; 11:DC32-DC36. [PMID: 28892894 DOI: 10.7860/jcdr/2017/24810.10277] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 05/04/2017] [Indexed: 12/15/2022]
Abstract
INTRODUCTION The Blood Group Antigen-Binding Adhesion (babA), Outer Inflammatory Protein (oipA) and Sialic Acid-Binding Adhesin (sabA) as outer membrane proteins involved in Helicobacter pylori adherence to gastric mucosa have been suggested to have a role in the pathogenesis. AIM To investigate the frequency of H. pylori isolates babA2, oipA and sabA genes in Iranian dyspeptic patients. MATERIALS AND METHODS DNAs were extracted from H. pylori -positive cultures taken from 100 different dyspeptic patients. Genotyping was performed by Polymerase Chain Reaction (PCR), using the specific primers for babA2, oipA and sabA genes. Chi square test was used to investigate association between variables, p<0.05 was considered statistically significant. RESULTS All (100%) isolates possessed oipA and sabA genotypes, whereas babA2 was detected in 22% of isolates. There was no significant relationship between presence of genes with clinical outcome. The combined genotype oipA +/sabA +/ babA2- was correlated with gastritis. The rate of babA2 genotype in our isolates was lower than other Iranian reports. CONCLUSION Frequency of babA2 genotype among H. pylori isolates from Southwest of Iran is considerably less than other regions of Iran. Due to heterogeneity of H. pylori strains in different geographic regions, further work will be needed to understand the role of these virulence genes in H. pylori pathogenesis and their possible association with disease outcome.
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Affiliation(s)
- Maryam Sohrabi
- Student, Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Reza Khashei
- Assistant Professor, Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mahvash Alizadeh
- Assistant Professor, Department of Internal Medicine, Gastroenterology Ward, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohammad-Kazem Hosseini Asl
- Associate Professor, Department of Internal Medicine, Gastroenterology Ward, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohammad-Ali Nejati
- Assistant Professor, Department of Internal Medicine, Gastroenterology Ward, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mahintaj Dara
- Ph.D Student, Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Abdollah Bazargani
- Associate Professor, Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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Román-Román A, Martínez-Carrillo DN, Atrisco-Morales J, Azúcar-Heziquio JC, Cuevas-Caballero AS, Castañón-Sánchez CA, Reyes-Ríos R, Betancourt-Linares R, Reyes-Navarrete S, Cruz-Del Carmen I, Camorlinga-Ponce M, Cortés-Malagón EM, Fernández-Tilapa G. Helicobacter pylori vacA s1m1 genotype but not cagA or babA2 increase the risk of ulcer and gastric cancer in patients from Southern Mexico. Gut Pathog 2017; 9:18. [PMID: 28413454 PMCID: PMC5390388 DOI: 10.1186/s13099-017-0167-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 04/05/2017] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The vacA, cagA and babA2 genotypes of Helicobacter pylori are associated with gastric pathology. The objectives were to determine the frequency of infection and distribution of the vacA, cagA and babA2 genotypes of H. pylori in patients with gastric ulcer, chronic gastritis and gastric cancer, and to evaluate the association of virulent genotypes with diagnosis. METHODS We studied 921 patients with symptoms of dyspepsia or with presumptive diagnosis of gastric cancer. The DNA of H. pylori and the vacA, cagA and babA2 genes was detected by PCR in total DNA from gastric biopsies. The association of H. pylori and of its cagA, vacA and babA2 genotypes with diagnosis was determined by calculating the odds ratio (OR). RESULTS Chronic gastritis was confirmed in 767 patients, gastric ulcer in 115 and cancer in 39. The prevalence of H. pylori was 47.8, 49.6 and 61.5% in those groups, respectively. H. pylori was more frequent in the surrounding tissue (69.2%) than in the tumor (53.8%). The vacA s1m1 genotype predominated in the three groups (45.2, 61.4 and 83.3%, respectively). H. pylori was associated with cancer (ORadjusted = 2.08; 95% CI 1.05-4.13; p = 0.035) but not with ulcer (ORadjusted = 1.07; 95% CI 0.71-1.61; p = 0.728). The s1m1 genotype was associated with ulcer and cancer (ORadjusted = 2.02; 95% CI 1.12-3.62; p = 0.019 and ORadjusted = 6.58; 95% CI 2.15-20.08; p = 0.001, respectively). babA2 was associated with gastric cancer, and cagA was not associated with the diagnosis. CONCLUSIONS In population from Southern Mexico, H. pylori and the s1m1 genotype were associated with gastric cancer and the s1m1/cagA+/babA2+ strains predominated in tumor and adjacent tissue.
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Affiliation(s)
- Adolfo Román-Román
- Laboratorio de Investigación en Bacteriología, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero México
| | - Dinorah Nashely Martínez-Carrillo
- Laboratorio de Investigación Clínica, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Avenida Lázaro Cárdenas S/N Ciudad Universitaria Sur, Col. La Haciendita, 39087 Chilpancingo, Guerrero México
| | - Josefina Atrisco-Morales
- Laboratorio de Investigación Clínica, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Avenida Lázaro Cárdenas S/N Ciudad Universitaria Sur, Col. La Haciendita, 39087 Chilpancingo, Guerrero México
| | - Julio César Azúcar-Heziquio
- Laboratorio de Investigación Clínica, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Avenida Lázaro Cárdenas S/N Ciudad Universitaria Sur, Col. La Haciendita, 39087 Chilpancingo, Guerrero México
| | - Abner Saúl Cuevas-Caballero
- Laboratorio de Investigación Clínica, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Avenida Lázaro Cárdenas S/N Ciudad Universitaria Sur, Col. La Haciendita, 39087 Chilpancingo, Guerrero México
| | | | - Roxana Reyes-Ríos
- Laboratorio de Investigación Clínica, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Avenida Lázaro Cárdenas S/N Ciudad Universitaria Sur, Col. La Haciendita, 39087 Chilpancingo, Guerrero México
| | | | - Salomón Reyes-Navarrete
- Servicio de Endoscopia, Instituto Estatal de Cancerología "Dr. Arturo Beltrán Ortega", Acapulco, Guerrero México
| | - Iván Cruz-Del Carmen
- Servicio de Endoscopia, Hospital General "Dr. Raymundo Abarca Alarcón", Chilpancingo, Guerrero México
| | - Margarita Camorlinga-Ponce
- Unidad de Investigación Médica en Enfermedades Infecciosas y Parasitarias, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, IMSS, Ciudad de México, México
| | - Enoc Mariano Cortés-Malagón
- Laboratorio de Biología Molecular del Cáncer, Unidad de Investigación, Hospital Juárez de México, Ciudad de México, México
| | - Gloria Fernández-Tilapa
- Laboratorio de Investigación Clínica, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Avenida Lázaro Cárdenas S/N Ciudad Universitaria Sur, Col. La Haciendita, 39087 Chilpancingo, Guerrero México
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Helicobacter pylori vacA and cagA genotype diversity and interferon gamma expression in patients with chronic gastritis and patients with gastric cancer. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2016; 79:220-8. [PMID: 25432406 DOI: 10.1016/j.rgmx.2014.10.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Revised: 10/22/2014] [Accepted: 10/23/2014] [Indexed: 01/09/2023]
Abstract
BACKGROUND Helicobacter pylori (H. pylori) is the main risk factor for the development of chronic gastritis, gastric ulcer, and gastric cancer. In H. pylori-infected individuals, the clinical result is dependent on various factors, among which are bacterial components, the immune response, and environmental influence. AIMS To compare IFN-γ expression with the H. pylori vacA and cagA genotypes in patients with chronic gastritis and patients with gastric cancer. METHODS Ninety-five patients diagnosed with chronic gastritis and 20 with gastric cancer were included in the study. Three gastric biopsies were taken; one was used for the molecular detection and genotyping of H. pylori; another was fixed in absolute alcohol and histologic sections were made for determining IFN-γ expression through immunohistochemistry. RESULTS No differences were found in the cells that expressed IFN-γ between the patients with chronic gastritis (median percentage of positive cells: 82.6% in patients without H. pylori and 82% in infected persons) and those with gastric cancer (70.5% in H. pylori-negative patients and 78.5% in infected persons). IFN-γ expression was 69% in chronic gastritis patients infected with H. pylori vacAs2m2/cagA⁻ it was 86.5% in patients infected with H. pylori vacAs1m2/cagA⁻, 86.5% in vacAs1m1/cagA⁻, and 82% in vacAs1m1/cagA⁺. Similar data were found in the patients with gastric cancer. CONCLUSIONS IFN-γ expression varied depending on the H. pylori vacA and cagA genotype, but not in accordance with the presence of chronic gastritis or gastric cancer.
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Alarcón-Millán J, Fernández-Tilapa G, Cortés-Malagón EM, Castañón-Sánchez CA, De Sampedro-Reyes J, Cruz-Del Carmen I, Betancourt-Linares R, Román-Román A. Clarithromycin resistance and prevalence of Helicobacter pylori virulent genotypes in patients from Southern México with chronic gastritis. INFECTION GENETICS AND EVOLUTION 2016; 44:190-198. [PMID: 27355861 DOI: 10.1016/j.meegid.2016.06.044] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 06/21/2016] [Accepted: 06/23/2016] [Indexed: 02/07/2023]
Abstract
In developing countries, clarithromycin resistance and frequency of re-infection are factors that contribute to high prevalence of Helicobacter pylori infection. The aim of this research was determine the prevalence of clarithromycin resistance and its relation with A2142G, A2142C and A2143G mutations in the domain V of the 23S rRNA gene of H. pylori isolates in patients from Southern Mexico with chronic gastritis. Another purpose of this work was to study the prevalence of virulent genotypes and distribution of resistant strains according to the vacA/cagA/babA2 H. pylori genotypes. One hundred forty-four patients with chronic gastritis were studied. Forty-five H. pylori strains were isolated and clarithromycin susceptibility was determined by the disk-diffusion method. The 82.2% of the strains had the combination of alleles vacA s1 m1 and the cagA gene was detected in 77.8% and 40% of the strains were babA2 positive. The vacA s1 m1 genotype was detected more frequently in cagA(+) strains, vacA s1m1/cagA(+)/babA2(-) genotype was more frequent than vacA s1m1/cagA(+)/babA2(+), 37.8% and 33.3%, respectively. Eight strains were clarithromycin resistant, in three of these, point mutations were identified, but only in one strain the A2143G mutation associated with clarithromycin resistance was found. Other point mutations (A1821G, G1826A, T1830C, A2089G, T1600C, C1601T, C1602T, T1610C, A1611C and T1633G) that have not been associated with clarithromycin resistance were identified. The highest proportion of resistant strains was vacA s1m1/cagA(+) (62.5%). In patients from southern Mexico with chronic gastritis, the prevalence of clarithromycin resistance is within internationally accepted range (17.8%) and allows continued use of triple therapy for H. pylori eradication. However, it is necessary to monitor the evolution of clarithromycin resistance in this area. The largest proportion of resistant H. pylori strains is not harboring the A2142G, A2142C and A2143G mutations in the 23S rRNA gene (87.5%). The vacA s1m1/cagA(+) genotype was the most prevalent and among clarithromycin-resistant strains, this was the predominant.
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Affiliation(s)
- Judit Alarcón-Millán
- Laboratorio de Investigación en Bacteriología, Unidad Académica de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, México.
| | - Gloria Fernández-Tilapa
- Laboratorio de Investigación Clínica, Unidad Académica de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, México.
| | - Enoc Mariano Cortés-Malagón
- Laboratorio de Biología Molecular del Cáncer, Unidad de Investigación, Hospital Juárez de México, Ciudad de México, México.
| | | | | | - Iván Cruz-Del Carmen
- Hospital General "Dr. Raymundo Abarca Alarcón", Chilpancingo, Guerrero, México; Unidad Especializada de Gastroenterología Endoscopia, Chilpancingo, Guerrero, México.
| | | | - Adolfo Román-Román
- Laboratorio de Investigación en Bacteriología, Unidad Académica de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, México.
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Pajavand H, Alvandi A, Mohajeri P, Bakhtyari S, Bashiri H, Kalali B, Gerhard M, Najafi F, Abiri R. High Frequency of vacA s1m2 Genotypes Among Helicobacter pylori Isolates From Patients With Gastroduodenal Disorders in Kermanshah, Iran. Jundishapur J Microbiol 2015; 8:e25425. [PMID: 26862378 PMCID: PMC4740511 DOI: 10.5812/jjm.25425] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 02/05/2015] [Accepted: 04/13/2015] [Indexed: 02/06/2023] Open
Abstract
Background: Helicobacter pylori infection and related diseases outcome are mediated by a complex interplay between bacterial, host and environmental factors. Several distinct virulence factors of H. pylori have been shown to be associated with different clinical outcomes. Here we focused on vacA and cagA genotypes of H. pylori strains isolated from patients with gastric disorder. Objectives: The aim of this study was to determine the frequency of two toxins and genotypes of VacA toxin in patients referred to a central hospital in the west of Iran (Imam Reza hospital, Kermanshah) during 2011 - 2012. Patients and Methods: Samples were collected from patients infected with H. pylori. Gastric biopsy specimens from the stomach antrum and corpus were cultured. PCR analysis was performed for genotyping H. pylorivacA and cagA genes. Results: Helicobacter pylori was isolated from 48% (96/200) of patients with gastroduodenal disorders. In 81/96 (84%) cases, the cagA gene was present. Among different genotypes of vacA, two s1m2 and s2m2 genotypes were dominant with frequency of 39.5% and 50%, respectively. The frequency of the s1m1 genotype was 7.2% (7/96), which is much lower than elsewhere. H. pylori isolates with positive results for cagA gene and vacA s1m2 genotypes showed statistically significant correlation with peptic ulcer (s1m2 13/34 [38.2%] P = 0.003). However, isolates of H. pylori infection with cagA gene and vacAs2m2 genotypes were significantly associated with development of gastritis (s2m2 41/42 [97.6%] P = 0.000). Conclusions: About 90% of H. pylori strains potentially contained vacAs2m2 and s1m2 genotypes. Infection with H. pylori strain containing the cagA gene or the vacAs1m1 and s1m2 genotypes was associated with increased incidence of peptic ulcer disease (PUD).
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Affiliation(s)
- Hamid Pajavand
- Department of Microbiology, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, IR Iran
| | - Amirhooshang Alvandi
- Department of Microbiology, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, IR Iran
| | - Parviz Mohajeri
- Department of Microbiology, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, IR Iran
| | - Somaye Bakhtyari
- Department of Microbiology, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, IR Iran
| | - Homayoon Bashiri
- Department of Internal Medicine, Imam Reza Hospital, Kermanshah University of Medical Sciences, Kermanshah, IR Iran
| | - Behnam Kalali
- Department of Medical Microbiology, Immunology and Hygiene, Technical University of Munich, Munich, Germany
| | - Markus Gerhard
- Department of Medical Microbiology, Immunology and Hygiene, Technical University of Munich, Munich, Germany
| | - Farid Najafi
- Department of Epidemiology, Epidemiology of Cancer, Kermanshah University of Medical Sciences, Kermanshah, IR Iran
| | - Ramin Abiri
- Department of Microbiology, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, IR Iran
- Corresponding author: Ramin Abiri, Department of Microbiology, Faculty of Medicine, Kermanshah University of Medical Sciences, P. O. Box: 6714869914, Kermanshah, IR Iran. Tel: +98-9122773648, Fax: +98-8314274623, E-mail:
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Garai J, Uddo RB, Mohler MC, Pelligrino N, Scribner R, Sothern MS, Zabaleta J. At the crossroad between obesity and gastric cancer. Methods Mol Biol 2015; 1238:689-707. [PMID: 25421687 DOI: 10.1007/978-1-4939-1804-1_36] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Obesity has reached epidemic proportions worldwide with disproportionate prevalence in different communities and ethnic groups. Recently, the American Medical Association recognized obesity as a disease, which is a significant milestone that opens the possibilities of treating obesity under standardized health plans. Obesity is an inflammatory disease characterized by elevated levels of biomarkers associated with abnormal lipid profiles, glucose levels, and blood pressure that lead to the onset of metabolic syndrome. Interestingly, inflammatory biomarkers, in particular, have been implicated in the risk of developing several types of cancer. Likewise, obesity has been linked to esophageal, breast, gallbladder, kidney, pancreatic, and colorectal cancers. Thus, there exists a link between obesity status and tumor appearance, which may be associated to the differential levels and the circulating profiles of several inflammatory molecules. For example, mediators of the inflammatory responses in both obesity and gastric cancer risk are the same: pro-inflammatory molecules produced by the activated cells infiltrating the inflamed tissues. These molecules trigger pathways of activation shared by obesity and cancer. Therefore, understanding how these different pathways are modulated would help reduce the impact that both diseases, and their concomitant existence, have on society.
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Affiliation(s)
- Jone Garai
- Stanley S. Scott Cancer Center, Louisiana Cancer Research Center, Louisiana State University Health Sciences Center, New Orleans, LA, 70112, USA
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Beltrán-Anaya FO, Poblete TM, Román-Román A, Reyes S, de Sampedro J, Peralta-Zaragoza O, Rodríguez MÁ, del Moral-Hernández O, Illades-Aguiar B, Fernández-Tilapa G. The EPIYA-ABCC motif pattern in CagA of Helicobacter pylori is associated with peptic ulcer and gastric cancer in Mexican population. BMC Gastroenterol 2014; 14:223. [PMID: 25539656 PMCID: PMC4302603 DOI: 10.1186/s12876-014-0223-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 12/17/2014] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Helicobacter pylori chronic infection is associated with chronic gastritis, peptic ulcer, and gastric cancer. Cytotoxin-associated gene A (cagA)-positive H. pylori strains increase the risk of gastric pathology. The carcinogenic potential of CagA is linked to its polymorphic EPIYA motif variants. The goals of this study were to investigate the frequency of cagA-positive Helicobacter pylori in Mexican patients with gastric pathologies and to assess the association of cagA EPIYA motif patterns with peptic ulcer and gastric cancer. METHODS A total of 499 patients were studied; of these, 402 had chronic gastritis, 77 had peptic ulcer, and 20 had gastric cancer. H. pylori DNA, cagA, and the EPIYA motifs were detected in total DNA from gastric biopsies by PCR. The type and number of EPIYA segments were determined by the electrophoretic patterns. To confirm the PCR results, 20 amplicons of the cagA 3' variable region were sequenced, and analyzed in silico, and the amino acid sequence was predicted with MEGA software, version 5. The odds ratio (OR) was calculated to determine the associations between the EPIYA motif type and gastric pathology and between the number of EPIYA-C segments and peptic ulcers and gastric cancer. RESULTS H. pylori DNA was found in 287 (57.5%) of the 499 patients, and 214 (74%) of these patients were cagA-positive. The frequency of cagA-positive H. pylori was 74.6% (164/220) in chronic gastritis patients, 73.6% (39/53) in peptic ulcer patients, and 78.6% (11/14) in gastric cancer patients. The EPIYA-ABC pattern was more frequently observed in chronic gastritis patients (79.3%, 130/164), while the EPIYA-ABCC sequence was more frequently observed in peptic ulcer (64.1%, 25/39) and gastric cancer patients (54.5%, 6/11). However, the risks of peptic ulcer (OR = 7.0, 95% CI = 3.3-15.1; p < 0.001) and gastric cancer (OR = 5.9, 95% CI = 1.5-22.1) were significantly increased in individuals who harbored the EPIYA-ABCC cagA gene pattern. CONCLUSIONS cagA-positive H. pylori is highly prevalent in southern Mexico, and all CagA variants were of the western type. The cagA alleles that code for EPIYA-ABCC motif patterns are associated with peptic ulcers and gastric cancer.
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Martínez-Carrillo D, Atrisco-Morales J, Hernández-Pando R, Reyes-Navarrete S, Betancourt-Linares R, Cruz-del Carmen I, Illades Aguiar B, Román-Román A, Fernández-Tilapa G. Helicobacter pylori vacA and cagA genotype diversity and interferon gamma expression in patients with chronic gastritis and patients with gastric cancer. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO (ENGLISH EDITION) 2014. [DOI: 10.1016/j.rgmxen.2014.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Prevalence and correlation with clinical diseases of Helicobacter pylori cagA and vacA genotype among gastric patients from Northeast China. BIOMED RESEARCH INTERNATIONAL 2014; 2014:142980. [PMID: 24949419 PMCID: PMC4052682 DOI: 10.1155/2014/142980] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 04/02/2014] [Accepted: 04/23/2014] [Indexed: 12/12/2022]
Abstract
Helicobacter pylori vacA and cagA genes have significant genetic heterogenicity, resulting in different clinical outcomes. Northeast part of China has reported high prevalence of H. pylori infections and gastric cancer. Hence, we investigated the H. pylori cagA and vacA genotypes with clinical outcomes in Northeast China. Gastric tissue samples (n = 169), chronic gastritis (GIs), gastric ulcer (GU), and gastric cancer (GC) were analysed for 16S rRNA ureA, cagA, and cagA genotypes by PCR. A total of 141 (84%) cases were found positive for H. pylori by 16S rRNA and ureA. GC showed high H. pylori infection (93%) compared with GIs (72%) and GU (84%). The vacAs1am1 was highly found in GC (40%) and GU (36%), vacAs1am2 in GIs (33%), vacAs1bm1 (14%) and vacAs1bm2 (8%) in GU cases, and s2m1 in normal cases (33%), while vacAs1cm1 showed low frequency in GIs (2%) and GU (3%) and GC showed negative result. The East-Asian cagA strain was highly observed in GC (43%), as compared to GIs (41%) and GU (20%). The East-Asian cagA/vacAs1am1 was significantly higher in GC (23%) than in GU (22%) and GIs (145) patients. The East-Asian type cagA with vacAs1a and vacAm1 is the most predominant genotype in H. pylori strains of Northeast China.
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Sampieri CL, Mora M. Gastric cancer research in Mexico: A public health priority. World J Gastroenterol 2014; 20:4491-4502. [PMID: 24782602 PMCID: PMC4000486 DOI: 10.3748/wjg.v20.i16.4491] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Revised: 12/12/2013] [Accepted: 01/08/2014] [Indexed: 02/06/2023] Open
Abstract
This study aimed review studies conducted on Mexican patients diagnosed with gastric cancer and/or diseases associated with its development, in which at least one Mexican institute has participated, and to assess their contributions to the primary and secondary prevention of this disease. A search of the Medline database was conducted using the following keywords: gastric/stomach cancer, Mexico. Studies of the Mexican population were selected in which at least one Mexican Institute had participated and where the findings could support public policy proposals directed towards the primary or secondary prevention of gastric cancer. Of the 148 studies found in the Medline database, 100 were discarded and 48 were reviewed. According to the analysis presented, these studies were classified as: epidemiology of gastric cancer (5/48); risk factors and protectors relating to gastric cancer (9/48); relationship between Helicobacter pylori and pathologies associated with gastric cancer and the development of the disease (16/48); relationship between the Epstein-Barr virus and pathologies associated with gastric cancer and the development of the disease (3/48); molecular markers for the development of diseases associated with gastric cancer and gastric cancer (15/48). Mexico requires a program for the prevention and control of gastric cancer based on national health indicators. This should be produced by a multidisciplinary committee of experts who can propose actions that are relevant in the current national context. The few studies of gastric cancer conducted on the Mexican population in national institutes highlight the poor connection that currently exists between the scientific community and the health sector in terms of resolving this health issue. Public policies for health research should support projects with findings that can be translated into benefits for the population. This review serves to identify national research groups studying gastric cancer in the Mexican population.
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Sedaghat H, Moniri R, Jamali R, Arj A, Razavi Zadeh M, Moosavi SGA, Rezaei M, pourbabaee M. Prevalence of Helicobacter pylori vacA, cagA, cagE, iceA, babA2, and oipA genotypes in patients with upper gastrointestinal diseases. IRANIAN JOURNAL OF MICROBIOLOGY 2014; 6:14-21. [PMID: 25954486 PMCID: PMC4419040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND OBJECTIVES Helicobacter pylori has been strongly associated with peptic ulcer diseases, chronic gastritis, ulcers, and reported as a risk factor for gastric cancer, too. The vaculating cytotoxin (vacA), the cytotoxin associated genes (cagA), the induced by contact with epithelium factor antigen (iceA gene), blood adhesion binding antigen (babA2), and outer membrane protein oipA have been described as different virulence factors of H. pylori. The aim of this study was to investigate the prevalence of the vacA, cagA, cagE, iceA, babA2 and oipA genotypes of H. pylori isolates from patients with upper gasterointestinal problem or dyspepsia. MATERIAL AND METHODS H. pylori isolated from endoscopic biopsies obtained from 222 studied patients. PCR was done only on cultured positive samples. The vacA alleles, cagA, cagE, iceA, babA2 and oipA genotypes were determined by PCR. RESULTS The isolation rate of H. pylori strains from culture of gastric biopsies was 16.7%. The vacA alleles s1, s2, m1 and m2 were detected in 20 (54.1%), 14 (37.8%), 9 (24.3%) and 23 (62.2%) isolates, respectively. VacA s1c genotype was detected in 70.3% of isolates. s1m2 was the most frequent vacA allelic combination in the examined H. pylori strains. The cagA gene was detected in 62.2%, cagE in 40.5%, iceA1 in 48.6%, iceA2 in 16.2%, oipA in 81.1% (95% CI: 0.0902-0.1798) and babA2 in 94.6% (95% CI: 0.113- 0.207). A significant correlation was observed between vacAs1 and cagA genotypes (P<0.008), vacAs1/cagE (P=0.001), vacAs2/cagA (P<0.047), and vacAs2/cagE (P=0.016) with Non-ulcer dyspepsia; but there were not observed any correlation between other virulence markers. CONCLUSION No significant correlation was found between the existence of vacA, cagA, cagE, iceA, babA2, and oipA genes with peptic ulcer diseases and non-ulcer dyspepsia groups of studied patients.
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Affiliation(s)
- Hossein Sedaghat
- Department of Microbiology and Immunology, Faculty of Medicine, Anatomical Sciences Research Center, Kashan University of Medical Sciences, Kashan, Iran
| | - Rezvan Moniri
- Department of Microbiology and Immunology, Faculty of Medicine, Anatomical Sciences Research Center, Kashan University of Medical Sciences, Kashan, Iran,Department of Microbiology and Immunology, Faculty of Medicine, Anatomical Sciences Research Center, Kashan University of Medical Sciences, Kashan, Iran,Corresponding author: Rezvan Moniri DVM, Ph.D Address: Department of Microbiology and Immunology, Faculty of Medicine, Anatomical Sciences Research Center, Kashan University of Medical Sciences, Kashan, Iran, Phone:+98-361 5550021-25, Fax:+98-361-5551112,
| | - Raika Jamali
- Gastroenterology Department, Sina Hospital,Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Arj
- Gastroenterology Department, Beheshti Hospital,Kashan University of Medical Sciences, Kashan, Iran
| | - Mohsen Razavi Zadeh
- Gastroenterology Department, Beheshti Hospital,Kashan University of Medical Sciences, Kashan, Iran
| | | | - Maryam Rezaei
- Department of Microbiology and Immunology, Faculty of Medicine, Anatomical Sciences Research Center, Kashan University of Medical Sciences, Kashan, Iran
| | - Mohammad pourbabaee
- Department of Microbiology and Immunology, Faculty of Medicine, Anatomical Sciences Research Center, Kashan University of Medical Sciences, Kashan, Iran
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Havaei SA, Mohajeri P, Khashei R, Salehi R, Tavakoli H. Prevalence of Helicobacter pylori vacA different genotypes in Isfahan, Iran. Adv Biomed Res 2014; 3:48. [PMID: 24627856 PMCID: PMC3949348 DOI: 10.4103/2277-9175.125761] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Accepted: 07/21/2012] [Indexed: 01/23/2023] Open
Abstract
Background: It is believed that the Helicobacter pylori (H. pylori) vacA gene, as a major virulence determinant (One of the major virulence determinant, not major), may be a risk factor for the development of gastroduodenal diseases. The frequency of vacA genotypes varies in different human populations. This study evaluated the prevalence of vacA alleles/genotypes among dyspeptic patients in Isfahan. Materials and Methods: One-hundred H. pylori-positive adult patients were examined in this study. After culture of gastric biopsies and DNA extraction from individual H. pylori isolates, the (all H. pylori strains harbor vacA alleles, please replace “presence” with “genotypes”) of the vacA s and m alleles were determined using polymerase chain reaction (PCR). Results: There were four vacA mosaicisms, including 28 for s1a/m1 (28%), 23 for s1b/m1 (23%), 26 for s1a/m2 (26%) and 23 for s1b/m2 (23%). The s2 allele was not found. The predominant vacA genotype in patients with non-ulcer dyspepsia and duodenal ulcer was s1a/m2, whereas in patients with adenocarcinoma was s1a/m1. Conclusion: The results showed there was no significant correlation between different genotypes of the vacA and the clinical outcomes and appears to vacA genotypes were not useful determinants for gastrointestinal diseases in our area.
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Affiliation(s)
- S Asghar Havaei
- Department of Microbiology, School of Medicine, Isfahan University of Medical Science, Isfahan, Iran
| | - Parviz Mohajeri
- Department of Microbiology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Reza Khashei
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Rasoul Salehi
- Department of Cell Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Hamid Tavakoli
- Department of Gastroenterology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Ramis IB, Vianna JS, Silva Junior LVD, Von Groll A, Silva PEAD. cagE as a biomarker of the pathogenicity of Helicobacter pylori. Rev Soc Bras Med Trop 2013; 46:185-9. [PMID: 23740068 DOI: 10.1590/0037-8682-0054-2012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 02/07/2013] [Indexed: 01/01/2023] Open
Abstract
INTRODUCTION Helicobacter pylori infection is associated with gastro-duodenal diseases. Genes related to pathogenicity have been described for H. pylori and some of them appear to be associated with more severe clinical outcomes of the infection. The present study investigates the role of cagE as a pathogenicity biomarker of H. pylori compare it to cagA, vacA, iceA and babA2 genes and correlate with endoscopic diagnoses. METHODS Were collected biopsy samples of 144 dyspeptic patients at the Hospital of the Federal University of Rio Grande, Rio Grande do Sul, Brazil. After collection, the samples were sent for histological examination, DNA extraction and detection of all putative pathogenicity genes by PCR. RESULTS Of the 144 patients undergoing endoscopy, 57 (39.6%) presented H. pylori by histological examination and PCR by detection of the ureA gene. Based on the endoscopic diagnoses, 45.6% (26/57) of the patients had erosive gastritis, while 54.4% (31/57) had enanthematous gastritis. The genes cagA, cagE, vacAs1/m1, vacAs1/m2 and iceA1 were related to erosive gastritis, while the genes vacAs2/m2, iceA2 and babA2 were associated to enanthematous gastritis. We found a statistically significant association between the presence of cagE and the endoscopic diagnosis. However, we detect no statistically significant association between the endoscopic diagnosis and the presence of cagA, vacA, iceA and babA2, although a biological association has been suggested. Conclusions Thus, cagE could be a risk biomarker for gastric lesions and may contribute to a better evaluation of the H. pylori pathogenic potential and to the prognosis of infection evolution in the gastric mucosa.
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Affiliation(s)
- Ivy Bastos Ramis
- Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brasil
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Tajalli R, Nobakht M, Mohammadi-Barzelighi H, Agah S, Rastegar-Lari A, Sadeghipour A. The immunohistochemistry and toluidine blue roles for Helicobacter pylori detection in patients with gastritis. IRANIAN BIOMEDICAL JOURNAL 2013; 17:36-41. [PMID: 23279833 DOI: 10.6091/ibj.1094.2012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Helicobacter pylori, which is associated with many upper gastrointestinal diseases, is found in half of the population of the world. Several special stains and immunohistochemistry stain for H. pylori are available. The need for and usefulness of immunohistochemical (IHC) technique has been debated for years. Toluidine blue is a simple stain for microbiological studies and is easily available in laboratories. Therefore, this study was conducted to compare hematoxylin and eosin (H&E), Giemsa and toluidine blue staining with immunehistochemistry for detection of H. pylori in patients with gastritis and also to correlate the results of these staining methods with pathological grading. METHODS We reviewed 54 consecutive gastric biopsy specimens stained by H&E and Giemsa as well as by toluidine blue and immunohistochemistry stains for H. pylori. RESULTS H. pylori was positively identified by IHC in 43 (79.63%) patients, while positive samples were found in 18 (33.33%), 24 (44.44%) and 33 (61.11%) patients using H&E, Giemsa and toluidine blue staining methods. Our results showed that classical histological staining methods are not sensitive enough to identify low numbers or coccoid forms of organism, while toluidine blue and immunohistochemistry play an important role in detection of H. pylori infection. CONCLUSION Toluidine blue has been proved to be much more reliable than H&E and Giemsa in detection of H. pylori. In addition, in post treatment biopsies and in biopsies with unexplained chronic active gastritis without histological evidence of H. pylori should have immunohistochemistry done to detect possible low density or coccoid form of organisms.
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Affiliation(s)
- Raziye Tajalli
- Anti-Microbial Resistance Research Center, Tehran University of Medical Sciences, Tehran, Iran.,Science and Research Branch, Islamic Azad university, Tehran, Iran
| | - Maliheh Nobakht
- Anti-Microbial Resistance Research Center, Tehran University of Medical Sciences, Tehran, Iran.,Dept. of Histology and Neuroscience, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Shahram Agah
- Colorectal Research Center, Tehran University of Medical Sciences, Tehran; 5Dep. of Oncopathology, Tehran University of Medical Sciences, Tehran, Iran
| | - Abdolaziz Rastegar-Lari
- Anti-Microbial Resistance Research Center, Tehran University of Medical Sciences, Tehran, Iran
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Román-Román A, Giono-Cerezo S, Camorlinga-Ponce M, Martínez-Carrillo DN, Loaiza-Loeza S, Fernández-Tilapa G. vacA genotypes of Helicobacter pylori in the oral cavity and stomach of patients with chronic gastritis and gastric ulcer. Enferm Infecc Microbiol Clin 2013; 31:130-5. [DOI: 10.1016/j.eimc.2012.09.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Revised: 08/10/2012] [Accepted: 09/02/2012] [Indexed: 12/13/2022]
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Talebi Bezmin Abadi A, Ghasemzadeh A, Mohabati Mobarez A. Low frequency of cagA-positive Helicobacter pylori strains isolated from Iranian patients with MALT lymphoma. Intern Emerg Med 2013; 8:49-53. [PMID: 21461595 DOI: 10.1007/s11739-011-0579-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Accepted: 03/17/2011] [Indexed: 11/30/2022]
Abstract
Helicobacter pylori is predominantly involved in the etiology of digestive diseases. The aim of our study is to determine the relationship of cagA frequency with less investigated gastroduodenal disorders such as MALT (mucosal associated lymphoid tissue) lymphoma and gastric cancer. One hundred-twenty eight H. pylori-positive patients including: gastritis (n = 74), gastric cancer (n = 26) and MALT lymphoma (n = 28) were entered in our study. Antral biopsy specimen transport, bacterial culture and cagA detection were performed based on standard protocols. In brief, biopsies from positive H. pylori patients were investigated for presence of cagA gene by polymerase chain reactions (PCR) method. Of 128 consecutive Iranian patients with gastroduodenal disorders examined in our study, we identified 84 (65.6%) cagA-positive strains. However, six patients were excluded because of negative culture for identification of H. pylori. Prevalence of cagA in each categorized groups are following: 63/74 (85.1%) of gastritis patients, 16/28 (57.1%) and 5/26 gastric cancer (19.2%) of MALT lymphoma, respectively. Current findings reveal that the presence of cagA is not a reliable marker for prediction of digestive disorders caused by H. pylori infection. All our patients with gastric cancer were diagnosed as adenocarcinoma. The low rate of cagA among gastric cancer and MALT lymphoma groups was not statistically significant, possibly due to the small number of patients enrolled in the study. We suggest that a study with a high number of patients is needed for making more definitive assessment of the correlation between cagA-positive H. pylori and gastric cancer and MALT lymphoma.
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Affiliation(s)
- Amin Talebi Bezmin Abadi
- Department of Bacteriology, School of Medical Sciences, Tarbiat Modares University, PO Box 14115-111, Tehran, Iran
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González-Vázquez R, Herrera-González S, Cordova-Espinoza MG, Zúñiga G, Giono-Cerezo S, Hernández-Hernández JM, León-Ávila G. Helicobacter pylori: detection of iceA1 and iceA2 genes in the same strain in Mexican isolates. Arch Med Res 2012; 43:339-46. [PMID: 22884501 DOI: 10.1016/j.arcmed.2012.07.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Accepted: 07/04/2012] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Helicobacter pylori iceA1 and iceA2 gene amplification is usually performed to identify mixed populations as both genes are apparently reportedly exclusive. However, some strains isolated from Mexico show both iceA genes. The aim of this study was to establish the frequency of these genes in Mexican isolates and genomic diversity of the H. pylori strains. METHODS One hundred thirty six biopsies were obtained from 68 patients (39 children and 29 adults). The presence of H. pylori was confirmed in 3/18 children and 6/19 adults by culture. There were 93 clinical strains isolated from nine patients. Additionally, we studied 37 strains from a strain collection isolated from 10 patients. The strains were genotyped and dual iceA genes were identified by polymerase chain reaction (PCR) and amplicons were sequenced. In addition, an enterobacterial repetitive intergenic consensus PCR (ERIC-PCR) assay was performed as fingerprinting method. RESULTS The genotypification of the H. pylori isolates indicated that all strains were vacA+; 86% babA2+, 86% cagA+, 82% vacA s1m1+, 19% iceA1+, 9% iceA2+, and 72% of them carried both iceA1 and iceA2 genes. The ERIC-PCR profiling revealed that the strains clustered in eight genetic groups depending on the presence of iceA1, iceA2 or both. A basic local multiple alignment analysis of the nucleotide sequences revealed that the iceA1 and iceA2 genes exhibited no relevant similarity. CONCLUSION The results here showed the presence of triple-positive strains (babA, cagA, vacA) of H. pylori and strains carrying simultaneously both iceA1 and iceA2 genes.
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Affiliation(s)
- Rosa González-Vázquez
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, México, DF, Mexico
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Chuang CH, Yang HB, Sheu SM, Hung KH, Wu JJ, Cheng HC, Chang WL, Sheu BS. Helicobacter pylori with stronger intensity of CagA phosphorylation lead to an increased risk of gastric intestinal metaplasia and cancer. BMC Microbiol 2011; 11:121. [PMID: 21619658 PMCID: PMC3117684 DOI: 10.1186/1471-2180-11-121] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2010] [Accepted: 05/27/2011] [Indexed: 12/18/2022] Open
Abstract
Background Nearly all Taiwanese H. pylori stains are cagA-genopositive and encode CagA protein. In this study, we evaluated whether different intensity of tyrosine phosphorylated-CagA (p-CagA) had an impact on the clinical diseases and histological outcomes in this area. Results We enrolled 469 dyspeptic patients and prospectively obtained the gastric biopsy specimens and the H. pylori isolates. These patients were categorized according to the clinical diseases, such as duodenal ulcer, gastric ulcer, gastric cancer, and gastritis with or without intestinal metaplasia. Their gastric specimens were reviewed by the updated Sydney's system. Furthermore, a total of 146 patients were randomly selected from each clinical category for evaluation of their isolates' p-CagA intensity by in vitro AGS cells co-culture. The p-CagA was sparse in 30 (20.5%), weak in 59 (40.5%), and strong in 57 (39%) isolates. The isolates from the patients of gastric cancer or gastritis with intestinal metaplasia had stronger p-CagA intensity than those of gastritis without intestinal metaplasia (p ≤ 0.002). Moreover, the patients infected with isolates with strong or weak p-CagA intensity had a higher risk of gastric intestinal metaplasia (p < 0.05, odds ratio 3.09~15.26) than those infected with sparse p-CagA isolates. Conclusions Infection with H. pylori stains with stronger p-CagA intensity may lead to an increased risk of gastric intestinal metaplasia and cancer.
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Affiliation(s)
- Chiao-Hsiung Chuang
- Department of Internal Medicine, National Cheng Kung University, Tainan, Taiwan
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Antonio-Rincón F, López-Vidal Y, Castillo-Rojas G, Lazcano-Ponce EC, Ponce-de-León S, Tabche-Barrera ML, Aguilar-Gutiérrez GR. Pathogenicity island cag, vacA and IS605 genotypes in Mexican strains of Helicobacter pylori associated with peptic ulcers. Ann Clin Microbiol Antimicrob 2011; 10:18. [PMID: 21569518 PMCID: PMC3118320 DOI: 10.1186/1476-0711-10-18] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Accepted: 05/13/2011] [Indexed: 12/20/2022] Open
Abstract
Background Helicobacter pylori is associated with chronic gastritis, peptic ulcers, and gastric cancer. Two major virulence factors of H. pylori have been described: the pathogenicity island cag (cag PAI) and the vacuolating cytotoxin gene (vacA). Virtually all strains have a copy of vacA, but its genotype varies. The cag PAI is a region of 32 genes in which the insertion of IS605 elements in its middle region has been associated with partial or total deletions of it that have generated strains with varying virulence. Accordingly, the aim of this work was to determine the cag PAI integrity, vacA genotype and IS605 status in groups of isolates from Mexican patients with non-peptic ulcers (NPU), non-bleeding peptic ulcers (NBPU), and bleeding peptic ulcers (BPU). Methods The cag PAI integrity was performed by detection of eleven targeted genes along this locus using dot blot hybridization and PCR assays. The vacA allelic, cag PAI genotype 1 and IS605 status were determined by PCR analysis. Results Groups of 16-17 isolates (n = 50) from two patients with NPU, NBPU, and BPU, respectively, were studied. 90% (45/50) of the isolates harbored a complete cag PAI. Three BPU isolates lacked the cag PAI, and two of the NBPU had an incomplete cag PAI: the first isolate was negative for three of its genes, including deletion of the cagA gene, whereas the second did not have the cagM gene. Most of the strains (76%) had the vacA s1b/m1 genotype; meanwhile the IS605 was not present within the cag PAI of any strain but was detected elsewhere in the genome of 8% (4/50). Conclusion The patients had highly virulent strains since the most of them possessed a complete cag PAI and had a vacA s1b/m1 genotype. All the isolates presented the cag PAI without any IS605 insertion (genotype 1). Combined vacA genotypes showed that 1 NPU, 2 NBPU, and 1 BPU patients (66.6%) had a mixed infection; coexistence of H. pylori strains with different cag PAI status was observed in 1 NBPU and 2 BPU (50%) of the patients, but only two of these patients (NBPU and BPU) had different vacA genotypes.
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Affiliation(s)
- Fernando Antonio-Rincón
- Centro de Investigaciones Sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
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Chiurillo MA, Moran YH, Cañas M, Valderrama EJ, Armanie E. Infection with specific Helicobacter pylori-cag pathogenicity island strains is associated with interleukin-1B gene polymorphisms in Venezuelan chronic gastritis patients. Dig Dis Sci 2011; 56:449-56. [PMID: 20585978 DOI: 10.1007/s10620-010-1316-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2010] [Accepted: 06/14/2010] [Indexed: 12/17/2022]
Abstract
BACKGROUND The cag pathogenicity island (cag-PAI) is one of the major virulence factors of Helicobacter pylori, showing considerable geographic variation. AIM We investigated the prevalence of cagA, cagE, and cagT genes of cag-PAI and their association with proinflammatory IL-1B-511/-31/+3954 polymorphisms in Venezuelan chronic gastritis patients from a high-risk gastric cancer region. METHODS Presence of cag-PAI genes and IL-1B polymorphisms in 121 biopsy specimens was evaluated by polymerase chain reaction (PCR) and PCR-restriction fragment length polymorphism (RFLP), respectively. RESULTS cagA (+) and triple-positive (cagAET (+)) strains were detected in 79.3% and 70.2% of patients, respectively. We found that infection with cagA (+) and cagAET (+) strains was associated (P < 0.05) with hosts harboring both IL-1B +3954C allele and IL-1B-511T/-31C/+3954C haplotype (TCC (+)). The frequency of gastric atrophy was significantly higher (P < 0.020) among cagAET (+)/IL-1B-TCC (+) combined genotype carriers. CONCLUSION Carriage of IL-1B +3954C allele and IL-1B-TCC (+) haplotype could favor colonization of bacterial cagAET (+) strains, and the combination of these bacterial and host haplotypes could play a synergistic role in development of premalignant gastric lesions. This work contributes to understanding of the complex interaction between H. pylori virulence factors and cytokine genotypes involved in gastrointestinal diseases.
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Affiliation(s)
- Miguel Angel Chiurillo
- Decanato de Ciencias de la Salud, Universidad Centroccidental Lisandro Alvarado (UCLA), Barquisimeto, Venezuela.
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Martínez-Carrillo DN, Garza-González E, Betancourt-Linares R, Mónico-Manzano T, Antúnez-Rivera C, Román-Román A, Flores-Alfaro E, Illades-Aguiar B, Fernández-Tilapa G. Association of IL1B -511C/-31T haplotype and Helicobacter pylori vacA genotypes with gastric ulcer and chronic gastritis. BMC Gastroenterol 2010; 10:126. [PMID: 20979650 PMCID: PMC2988070 DOI: 10.1186/1471-230x-10-126] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Accepted: 10/27/2010] [Indexed: 02/08/2023] Open
Abstract
Background The association between proinflammatory cytokine gene polymorphisms and gastric diseases related to Helicobacter pylori varies by population and geographic area. Our objective was to determine if the IL-1B -511 T>C and -31 C>T polymorphisms and H. pylori vacA genotypes are associated with risk of chronic gastritis and gastric ulcer in a Mexican population. Methods We conducted endoscopic studies in 128 patients with symptoms of dyspepsia. We took two biopsies from the body, antrum, or ulcer edge from each patient, and classified our histopathological findings according to the Sydney System. H. pylori infection and vacA genotyping were accomplished via PCR from total DNA of the gastric biopsies. We confirmed the presence of anti-H. pylori serum IgG and IgM in 102 control subjects. In both case subjects and control subjects, the IL-1B -511 T>C polymorphism was genotyped by PCR-RFLPs and the IL-1B -31 C>T polymorphism was genotyped by pyrosequencing. Results Sixty-two point seven (62.7%) of the 102 control subjects were H. pylori-seropositive. Among the case subjects, 100 were diagnosed with chronic gastritis and 28 with gastric ulcer. We found that 77% of the patients with chronic gastritis and 85.7% of the patients with gastric ulcer were H. pylori-positive. The predominant H. pylori genotype was vacA s1m1 (58.4%) and the most frequent subtype was vacA s1. The -511 TC, (rs16944 -511 T>C) genotype and the -511C allele were associated with chronic gastritis (OR = 3.1, 95% CI = 1.4-6.8 and OR = 3.0, 95% CI = 1.4-6.0, respectively). The subjects carrying -31T (rs1143627 -31 C>T) were found to be at a higher risk of having chronic gastritis (OR = 2.8, 95% CI = 1.3-5.8). The IL-1B -511C/-31T haplotype was associated with chronic gastritis (OR = 2.1, 95% CI = 1.2-3.8) but not with gastric ulcer. Conclusions The H. pylori vacA genotypes identified herein were similar to those reported for other regions of Mexico. The vacA s1m1 genotype was not associated with gastric ulcer. In the southern Mexican population, the IL-1B -511C and -31T alleles and the -511C/-31T and -511T/-31T haplotypes are associated with increased risk of chronic gastritis and gastric ulcer.
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Affiliation(s)
- Dinorah N Martínez-Carrillo
- Laboratorio de Investigación Clínica, Unidad Académica de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Av, Lázaro Cárdenas S/N, Ciudad Universitaria, Colonia Haciendita, Chilpancingo, Guerrero, C,P, 39090, México
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