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Moghim S, Estaji F, Nasr Esfahani B, Zibaee S, Sanei M. EPIYA motif genetic characterization from Helicobacter pylori isolates in distinct geographical regions of Iran. Adv Biomed Res 2022; 11:77. [DOI: 10.4103/abr.abr_283_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 11/03/2021] [Accepted: 11/06/2021] [Indexed: 12/09/2022] Open
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Saniee P, Jalili S, Ghadersoltani P, Daliri L, Siavoshi F. Individual hosts carry H. pylori isolates with different cagA features - motifs and copy number. INFECTION GENETICS AND EVOLUTION 2021; 93:104961. [PMID: 34119688 DOI: 10.1016/j.meegid.2021.104961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 03/23/2021] [Accepted: 06/02/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND H. pylori strains with different genetic contents may infect different or an individual human host. Genetic diversity of cagA is thought to contribute to differences in H. pylori strains pathogenicity. In this study, diversity of cagA genotype, EPIYA motif and copy number was assessed in H. pylori single colonies isolated from individual patients. MATERIALS AND METHODS Gastric biopsies from 14H. pylori-positive dyspeptic patients were cultured on selective brucella blood agar and incubated at 37 °C under microaerobic conditions. Four single colonies were obtained from each biopsy subculture on brucella blood agar under similar incubation condition. Presence of cagA and types of EPIYA motifs was determined by polymerase chain reaction (PCR) and cagA copy number by quantitative real-time (RT) PCR. RESULTS Single colonies of 5 patients showed no variation in cagA genotype, EPIYA motif and copy number. Out of the remaining 9 patients, 1 patient showed presence or absence of cagA gene, 2 patients had mixed EPIYA motifs, 2 patients had different cagA copy number, 1 patient showed absence or presence of cagA and mixed motifs, 2 patients had cagA genes with different nucleotide sequences, 1 patient showed presence or absence of cagA and difference in cagA nucleotide sequence. Four isolates that contained multiple copies of cagA, carried EPIYA-ABC motif. CONCLUSION Genetic diversity of cagA among single colonies isolated from individual patients represents evidence that gastric mucosa of every individual is colonized with a specific and heterogeneous population of H. pylori. Future studies on patients in different disease groups may elucidate the role of mixed populations of H. pylori in development of gastric diseases.
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Affiliation(s)
- Parastoo Saniee
- Department of Microbiology and Microbial Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University G.C, Tehran, Iran.
| | - Shiva Jalili
- Department of Microbiology and Microbial Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University G.C, Tehran, Iran
| | - Paria Ghadersoltani
- Department of Microbiology and Microbial Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University G.C, Tehran, Iran
| | - Layegheh Daliri
- Department of Microbiology and Microbial Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University G.C, Tehran, Iran
| | - Farideh Siavoshi
- Department of Microbiology, School of Biology, University College of Sciences, University of Tehran, Tehran, Iran
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Khiddi F, Abdellahi MVM, Horma MA, Billoet A, Collobert G, Amar AM, Nech HDM, Vadel EHM, Houmeida A, Raymond J, Dauga C, Gastli N. Characteristics of Helicobacter pylori strains isolated from Mauritanian patients. Helicobacter 2020; 25:e12726. [PMID: 32686319 DOI: 10.1111/hel.12726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 06/18/2020] [Accepted: 06/23/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Helicobacter pylori (H pylori) is responsible for various diseases including cancer It co-evolved with humans, and human migrations shaped the expansion and the diversity of strains around the world. The risk of developing a disease depends on virulence factors, mainly the cytotoxin-associated gene A protein (CagA). The aim of this study was to determine the cagA status in H pylori strains from Mauritanian patients and to search for a relationship with endoscopic and histologic findings. MATERIAL AND METHODS H pylori was searched in gastric biopsies taken during endoscopy in patients with gastro-duodenal symptoms. RT-PCR was used for the diagnosis and resistance to clarithromycin. The cagA status was determined with PCR and the EPIYA-cagA polymorphism with sequencing. RESULTS At all, 76/78 (97.4%) biopsies were positive. The rate of clarithromycin resistance was 4/76 (5.26%) due to the A2143G mutation, with a mixed population in 2 cases. The cagA gene was present in 23/76 (30.26%) biopsies, and the EPIYA motif was ABC in 21 (91.3%). High bacterial load and inflammation were significantly associated with cagA-positive status (P < .01). Phylogenetic analysis of the glmM and hspA genes highlighted a mixture of African and European genes in strains of H pylori isolated from patients of Moor origin. CONCLUSION We report a high prevalence of H pylori infection in Mauritanian patients, a low rate of clarithromycin resistance (5.26%) and high bacterial load and inflammation associated with cagA-positive status. The phylogenetic analysis highlights the mix of different populations leading to the Moor ethnicity.
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Affiliation(s)
- Fatimetou Khiddi
- Unit of Epidemiology and Diversity of Microorganisms, Nouakchott, Mauritania
| | | | | | - Annick Billoet
- Centre, Université de Paris, France Bacteriology Laboratory, Cochin Hospital, AP-HP, Paris, France
| | - Ghislaine Collobert
- Centre, Université de Paris, France Bacteriology Laboratory, Cochin Hospital, AP-HP, Paris, France
| | - Ahmed Mohamed Amar
- Gastroenterology Department, Cheikh Zayid hospital, Nouakchott, Mauritania
| | | | | | - Ahmed Houmeida
- Anatomo-pathology Department, Chiva Clinic, Nouakchott, Mauritania
| | - Josette Raymond
- Centre, Université de Paris, France Bacteriology Laboratory, Cochin Hospital, AP-HP, Paris, France.,Université Paris Saclay, Bacteriology Laboratory, Bicêtre Hospital, AP-HP, Le Kremlin-Bicêtre, France
| | - Catherine Dauga
- Department of Computational Biology, Institut Pasteur, Paris, France
| | - Nabil Gastli
- Centre, Université de Paris, France Bacteriology Laboratory, Cochin Hospital, AP-HP, Paris, France
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Khaledi M, Bagheri N, Validi M, Zamanzad B, Afkhami H, Fathi J, Rahimian G, Gholipour A. Determination of CagA EPIYA motif in Helicobacter pylori strains isolated from patients with digestive disorder. Heliyon 2020; 6:e04971. [PMID: 33005792 PMCID: PMC7519360 DOI: 10.1016/j.heliyon.2020.e04971] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 08/14/2020] [Accepted: 09/15/2020] [Indexed: 12/12/2022] Open
Abstract
This study was conducted to identify patterns of cagA EPIYA motifs in H. pylori strains isolated from patients with gastrointestinal diseases in Hospitals of Shahrekord, and investigate the association between these biomarkers and clinical outcomes of gastrointestinal diseases due to H. pylori. In this study, 253 patients with gastrointestinal diseases were studied within 1395-1396. Histopathological investigations and urease test showed that 207 isolates were H. pylori-positive. Then, screening using a molecular technique, PCR, confirmed that 159 isolates had cagA. Finally, the pattern and prevalence of the motifs were determined by PCR and identified a number of motifs were sequenced. Results of this study showed that the pattern of motifs was as follows: ABC (140 isolates) (93/7%), ABCC (6 isolates) (3/77%), ABCCC (4 isolates) (2/5%), AB (7 isolates) (4/4%), AC (1 isolate) (0/6%), and BC (1 isolate) (0/6%). Sequencing results showed the presence of changed EPIYA motif in some isolates. CM motif sequence was also seen in all isolates. In this study, no significant association was seen between the prevalence rate of different patterns and clinical symptoms (p = 0.71). There is a slight association between the presence of ABC motifs and the type of digestive disorder (p = 0.056). Results indicated that ABC was the most frequently seen pattern however, in such that positive cases of ABC motifs were more common in gastritis. All isolates had kinase phosphorylation region, and the observed pattern in this region was a generally western type (ABC).
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Affiliation(s)
- Mansoor Khaledi
- Cellular and Molecular Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Nader Bagheri
- Cellular and Molecular Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Majid Validi
- Cellular and Molecular Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Behnam Zamanzad
- Cellular and Molecular Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Hamed Afkhami
- Department of Medical Microbiology, Medicine Faculty, Shahed University, Tehran, Iran
| | - Javad Fathi
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ghorbanali Rahimian
- Shahrekord, Iran Department of Internal Medicine, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Abolfazl Gholipour
- Cellular and Molecular Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
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Bińkowska A, Biernat MM, Łaczmański Ł, Gościniak G. Molecular Patterns of Resistance Among Helicobacter pylori Strains in South-Western Poland. Front Microbiol 2018; 9:3154. [PMID: 30619218 PMCID: PMC6305312 DOI: 10.3389/fmicb.2018.03154] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 12/05/2018] [Indexed: 12/27/2022] Open
Abstract
Treatment failure of Helicobacter pylori infection is caused mainly by progressive antibiotic resistance among H. pylori strains. In Poland, the prevalence of H. pylori strains resistant to metronidazole is higher than in other developed countries, reaching almost 50%, and resistance to clarithromycin is as high as 30% and is still increasing, contributing to the failure of first-line therapy in approximately 70% of patients. Moreover, the introduction of levofloxacin to eradication therapy of H. pylori infection quickly led to the emergence of resistant strains. Therefore, a necessary approach in microbiological diagnostics of H. pylori infection should be determination of susceptibility of H. pylori strains before the eradication treatment. Aim: In this study was to evaluate the molecular mechanisms of resistance among 170 H. pylori strains to clarithromycin, involving mutations in the 23S rRNA gene (A2143G, A2142G, A2143G) and to levofloxacin, involving mutations of gyrA and gyrB. Analysis was performed by using polymerase chain reaction and classical sequencing of DNA fragments. Results: Among examined strains, 26% were fully sensitive and 74% were resistant to at least one of the tested antibiotics. The overall resistance rate to metronidazole was as high as 56%, whereas to clarithromycin 46%, respectively. Resistance to LEV occurred among 6% of strains. All tested strains were susceptible to AMC and TET. The A2143G point mutation was found in 72% of clarithromycin-resistant strains. The most common mutation, present in 40% of H. pylori strains resistant to levofloxacin, was a change at position 91 of gyrA. Conclusion: The increasing number of point mutations in the 23S rRNA gene leads to an increase in the rates of antimicrobial resistance. Presence of the GCG allele at position 122 of the gyrA gene may cause an eightfold increase in risk of development of resistance to levofloxacin.
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Affiliation(s)
- Aldona Bińkowska
- 2nd Military Field Hospital of the Polish Armed Forces, Wrocław, Poland
| | - Monika Maria Biernat
- Department of Hematology, Blood Neoplasms, and Bone Marrow Transplantation, Wrocław Medical University, Wrocław, Poland
| | - Łukasz Łaczmański
- Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wrocław, Poland
| | - Grażyna Gościniak
- Department of Microbiology, Wrocław Medical University, Wrocław, Poland
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El Khadir M, Alaoui Boukhris S, Benajah DA, Ibrahimi SA, Chbani L, Bouguenouch L, El Rhazi K, El Abkari M, Nejjari C, Mahmoud M, Bennani B. Helicobacter pylori CagA EPIYA-C motifs and gastric diseases in Moroccan patients. INFECTION GENETICS AND EVOLUTION 2018; 66:120-129. [PMID: 30244090 DOI: 10.1016/j.meegid.2018.09.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 09/11/2018] [Accepted: 09/17/2018] [Indexed: 02/06/2023]
Abstract
BACKGROUND The pathogenicity of cagA-positive H. pylori strains is associated with the number and type of repeated sequences named EPIYA located in the C-terminal region of the CagA protein. The aim of this study is to determine the polymorphism of the H. pylori cagA 3' region circulating in Morocco and its association with different gastric pathologies. METHODS A total of 1353 consenting patients, were recruited in this study. The gastric biopsies performed during endoscopy were used for histological examination and for molecular characterization of H. pylori. The study of the type and number of "EPIYA" motif was identified by PCR directly on H. pylori positive biopsies. RESULTS Of all the biopsies, the infection rate was 61.1%. The cagA gene was amplified in 68.9% of the cases and the analysis of the 3' region of cagA showed the exclusive presence of the "Western CagA" type with a predominance of the EPIYA-ABC motif (71.4%). The number of EPIYA-C motif varies from 0 to 2. The multinomial analysis shows that the infection with strains of H. pylori having two EPIYA-C motifs is a factor that increases the risk of developing gastric cancer compared to gastritis cases with strains lacking this motif (OR = 11.64; CI: 3.34-45.15), whereas this risk is 6 fold higher in comparison with duodenal ulcer cases (OR = 6, CI: 1.29-27.76). CONCLUSIONS The results of this study suggest that the number of EPIYA-C motifs might be useful as a predictive marker of the infection evolution and will help in the identification of patients at high risk of developing gastric cancer.
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Affiliation(s)
- Mounia El Khadir
- Laboratoire de Microbiologie et Biologie Moléculaire, Equipe micro-organismes génomique et facteurs oncogènes, Faculté de Médecine et de Pharmacie de Fès (FMPF), Université Sidi Mohammed Ben Abdellah (USMBA), Morocco
| | - Samia Alaoui Boukhris
- Laboratoire de Microbiologie et Biologie Moléculaire, Equipe micro-organismes génomique et facteurs oncogènes, Faculté de Médecine et de Pharmacie de Fès (FMPF), Université Sidi Mohammed Ben Abdellah (USMBA), Morocco
| | - Dafr-Allah Benajah
- Service d'Hépato Gastro-entérologie CHU Hassan II de Fès, Equipe Maladies de l'appareil digestif (FMPF), Morocco; Laboratoire de Pathologie Humaine, Biomédecine et Environnement, FMPF, USMBA, Morocco
| | - Sidi Adil Ibrahimi
- Service d'Hépato Gastro-entérologie CHU Hassan II de Fès, Equipe Maladies de l'appareil digestif (FMPF), Morocco; Laboratoire de Pathologie Humaine, Biomédecine et Environnement, FMPF, USMBA, Morocco
| | - Laila Chbani
- Laboratoire de Pathologie Humaine, Biomédecine et Environnement, FMPF, USMBA, Morocco; Service d'Anatomie Pathologique CHU Hassan II, Morocco
| | - Laila Bouguenouch
- Unité de Génétique Médicale et d'Oncogénétique, Laboratoire Central d'Analyses Médicales CHU Hassan II, Morocco
| | - Karima El Rhazi
- Laboratoire d'Epidémiologie et de Recherche Clinique, FMPF, USMBA, Morocco
| | - Mohamed El Abkari
- Service d'Hépato Gastro-entérologie CHU Hassan II de Fès, Equipe Maladies de l'appareil digestif (FMPF), Morocco; Laboratoire de Pathologie Humaine, Biomédecine et Environnement, FMPF, USMBA, Morocco
| | - Chakib Nejjari
- Laboratoire d'Epidémiologie et de Recherche Clinique, FMPF, USMBA, Morocco
| | | | - Bahia Bennani
- Laboratoire de Microbiologie et Biologie Moléculaire, Equipe micro-organismes génomique et facteurs oncogènes, Faculté de Médecine et de Pharmacie de Fès (FMPF), Université Sidi Mohammed Ben Abdellah (USMBA), Morocco; Laboratoire de Pathologie Humaine, Biomédecine et Environnement, FMPF, USMBA, Morocco.
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Bakhti SZ, Latifi-Navid S, Zahri S, Bakhti FS, Hajavi N, Yazdanbod A. Are Helicobacter pylori highly cytotoxic genotypes and cardia gastric adenocarcinoma linked? Lessons from Iran. Cancer Biomark 2018; 21:235-246. [PMID: 29036792 DOI: 10.3233/cbm-170701] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Although the most extensive studies revealed the role of H. pylori VacA and CagA toxins in the development of gastric adenocarcinoma, the magnitude of this association and the correlations of vacA mosaicism and cagA status with cardia gastric adenocarcinoma (CGA) still remain controversial. OBJECTIVE We aimed to examine the linkage of H. pylori highly cytotoxic genotypes to CGA in Iranian populations as a model. METHODS A total of 601 Iranian patients were enrolled. Biopsies were cultured, genotyped, and anatomically and histologically classified. RESULTS The vacA c1 genotype, but not cagA status, showed a strong association with the risk of both CGA and non-cardia adenocarcinoma (NCGA), whether the controls were non-tumors, as those with either non-atrophic gastritis or peptic ulcerations, (the OR (95%CI) was 14.11 (4.91-40.52) and 9.59 (4.06-22.65), respectively) or those with NAG (the OR (95%CI) was 10.71 (3.49-32.82) and 8.11 (3.26-20.16), respectively). The vacA c1/cagA+ genotype was significantly associated with an increased risk of NCGA, whether the controls were non-tumors or those with NAG; the adjusted risk was 4.706 (1.41-15.67) and 4.85 (1.42-16.51), respectively. CONCLUSIONS The H. pylori vacA c1 genotype, but not cagA status, might be the first important bacterial biomarker for predicting the cardia adenocarcinoma risk in male patients aged ⩾ 55 in Iran.
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Affiliation(s)
- Seyedeh Zahra Bakhti
- Department of Biology, Faculty of Sciences, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran
| | - Saeid Latifi-Navid
- Department of Biology, Faculty of Sciences, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran.,Biosciences and Biotechnology Research Center, Faculty of Advanced Technologies, University of Mohaghegh Ardabili, Namin 56318-51167, Iran
| | - Saber Zahri
- Department of Biology, Faculty of Sciences, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran
| | - Fatemeh Sadat Bakhti
- Department of Biostatistics, Faculty of Public Health, Mazandaran University of Medical Sciences, Sari 48471-16548, Iran
| | - Naser Hajavi
- Gastrointestinal Cancer Research Center, Ardabil University of Medical Sciences, Ardabil 56189-53141, Iran
| | - Abbas Yazdanbod
- Gastrointestinal Cancer Research Center, Ardabil University of Medical Sciences, Ardabil 56189-53141, Iran.,Digestive Disease Research Center, Ardabil University of Medical Sciences, Ardabil 56189-53141, Iran
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Sheikh AF, Yadyad MJ, Goodarzi H, Hashemi SJ, Aslani S, Assarzadegan MA, Ranjbar R. CagA and vacA allelic combination of Helicobacter pylori in gastroduodenal disorders. Microb Pathog 2018; 122:144-150. [PMID: 29908307 DOI: 10.1016/j.micpath.2018.06.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 06/12/2018] [Accepted: 06/12/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Allelic variation of the virulence genes, vacA and cagA, as the most important virulence associated genes play an important role in the pathogenesis of severe gastrointestinal disease. OBJECTIVE The aim of the present study was to identify the diversity of the virulence genes in patients with Gastric Cancer (GC), who were referred to the gastro-endoscopy unit of Imam Khomeini Hospital, Ahvaz Jundishapur University of medical science, Ahvaz, Iran. METHODS Gastric biopsy specimens from 301 patients suspected to gastrointestinal disorders, were analyzed for H. pylori using molecular and phenotypical methods (culture, and biochemical test (catalase, oxidase and urease tests)). RESULTS Among 201 PCR positive for H. pylori, using histopathological methods, 22 (10.9%) patients had GC. Presence of vacA gene in our H. pylori strains was 100% (201/201), while the most virulent vacA s1 allele was detected in 82.6% isolates, and the mid region vacA m1 was found in 39.8% isolates. The vacA s1/m1 genotype was the most virulent allelic combination in GC and Peptic Ulcer Disease (PUD) in 68.2% and 50%, respectively. The cagA gene was detected in 66.7% isolates. Among the cagA positive isolates, EPIYA-ABC motif was the most common motif in the GC (66.7%), PUD (55.6%) and Erosive Gastroduodenitis (EG) samples (55.2%), while EPIYA-ABCC was the most common motif (58.7%) in the Non-Ulcer Dyspepsia (NUD) samples. The vacA s1m1/cagA+ combination was detected in GC (73.3%) and PUD (51.9%), while vacA s1m2/cagA+ presented in the NUD and EG samples in 77.8% and 62.1%, respectively. CONCLUSION In this work, Western type (EPIYA-ABC and ABCC motifs) cagA, vacA s1m1 combinations have been demonstrated as the dominant genotype in the tested Ahvazian H. Pylori strains. Also the participation of cagA gene and vacA s1m1 genotype in development and severity of gastric disorder was well evident. Therefore, infection with H. pylori strain containing the cagA gene or the vacA s1m1 genotypes could be associated with increased risk of GC. This is the first study in our area that reports the high incidence and diversity of allelic combination of cagA and vacA genes in gastroduodenitis patients.
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Affiliation(s)
- Ahmad Farajzadeh Sheikh
- Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Microbiology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Mohammad Jaafar Yadyad
- Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Hamed Goodarzi
- Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Microbiology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Molecular Biology Research Center, Baqiyatallah University of Medical Science, Tehran, Iran.
| | - Seyed Jalal Hashemi
- Research Institute for Infectious Diseases of the Digestive System, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Division of Gastroenterology and Hepatology, Ahvaz Jundishapur University of Medical Sciences, Ahwaz, Iran.
| | - Sajad Aslani
- Student Research Committee, Kerman University of Medical Sciences, Kerman, Iran
| | | | - Reza Ranjbar
- Molecular Biology Research Center, Baqiyatallah University of Medical Science, Tehran, Iran.
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Vaziri F, Tarashi S, Fateh A, Siadat SD. New insights of Helicobacter pylori host-pathogen interactions: The triangle of virulence factors, epigenetic modifications and non-coding RNAs. World J Clin Cases 2018; 6:64-73. [PMID: 29774218 PMCID: PMC5955730 DOI: 10.12998/wjcc.v6.i5.64] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Revised: 02/09/2018] [Accepted: 03/07/2018] [Indexed: 02/05/2023] Open
Abstract
Helicobacter pylori (H. pylori) is a model organism for understanding host-pathogen interactions and infection-mediated carcinogenesis. Gastric cancer and H. pylori colonization indicates the strong correlation. The progression and exacerbation of H. pylori infection are influenced by some factors of pathogen and host. Several virulence factors involved in the proper adherence and attenuation of immune defense to contribute the risk of emerging gastric cancer, therefore analysis of them is very important. H. pylori also modulates inflammatory and autophagy process to intensify its pathogenicity. From the host regard, different genetic factors particularly affect the development of gastric cancer. Indeed, epigenetic modifications, MicroRNA and long non-coding RNA received more attention. Generally, various factors related to pathogen and host that modulate gastric cancer development in response to H. pylori need more attention due to develop an efficacious therapeutic intervention. Therefore, this paper will present a brief overview of host-pathogen interaction especially emphases on bacterial virulence factors, interruption of host cellular signaling, the role of epigenetic modifications and non-coding RNAs.
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Affiliation(s)
- Farzam Vaziri
- Microbiology Research Center, Pasteur Institute of Iran, Tehran 1316943551, Iran
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran 1316943551, Iran
| | - Samira Tarashi
- Microbiology Research Center, Pasteur Institute of Iran, Tehran 1316943551, Iran
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran 1316943551, Iran
| | - Abolfazl Fateh
- Microbiology Research Center, Pasteur Institute of Iran, Tehran 1316943551, Iran
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran 1316943551, Iran
| | - Seyed Davar Siadat
- Microbiology Research Center, Pasteur Institute of Iran, Tehran 1316943551, Iran
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran 1316943551, Iran
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10
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Farzi N, Yadegar A, Aghdaei HA, Yamaoka Y, Zali MR. Genetic diversity and functional analysis of oipA gene in association with other virulence factors among Helicobacter pylori isolates from Iranian patients with different gastric diseases. INFECTION GENETICS AND EVOLUTION 2018; 60:26-34. [PMID: 29452293 DOI: 10.1016/j.meegid.2018.02.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Revised: 01/29/2018] [Accepted: 02/12/2018] [Indexed: 12/15/2022]
Abstract
Helicobacter pylori (H. pylori) is one of the most genetically diverse bacterial pathogens that persistently colonizes the human gastric epithelium. This remarkable genomic plasticity may act as a driving force for successful adaptation and persistence of the bacteria in the harsh gastric environment. Outer inflammatory protein A (OipA) encoded by oipA gene (HP0638/hopH) is a member of the outer membrane proteins (OMPs) of H. pylori involved in induction of IL-8 secretion and is associated with development of peptic ulcer and gastric cancer. Expression of OipA is regulated by phase variation within a CT dinucleotide repeat motif of the oipA gene. In this study we carried out direct DNA sequence analysis of 53 amplified fragments to investigate the oipA "On/Off" status among Iranian H. pylori isolates from patients with various gastric diseases. The prevalence of cagL, cagA, EPIYA motifs, vacA alleles, babA2 and sabA genotypes as well as cagPAI integrity of the isolates were determined by PCR. Our results demonstrated a high prevalence of strains with functional oipA status (79%) and significant associations were found between functional oipA and cagA (P = 0.027) and vacA s1m1 (P = 0.022) genotypes. The vacA s1m2 genotype was also found to be statistically associated with PUD (P = 0.0001). Interestingly, we showed that H. pylori strains with intact cagPAI co-expressed oipA gene in a significant synergistic relationship (P < 0.01). However, no significant association was observed between the functional oipA status and clinical outcomes (P > 0.05). In conclusion, our findings denotes great diversity in the number and pattern of CT dinucleotide repeats of oipA among Iranian H. pylori strains. The synergistic link between functional oipA and other important virulence factors is proposed to be critical in the pathogenesis of H. pylori, which needs further studies with a larger number of samples.
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Affiliation(s)
- Nastaran Farzi
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abbas Yadegar
- Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Hamid Asadzadeh Aghdaei
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Yoshio Yamaoka
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Oita, Japan
| | - Mohammad Reza Zali
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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11
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Nitazoxanide and Doxycycline Sensitivity Among Metronidazole Resistant Helicobacter pylori Isolates from Patients with Gastritis. ARCHIVES OF CLINICAL INFECTIOUS DISEASES 2018. [DOI: 10.5812/archcid.66693] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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12
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Kamarehei F, Khabiri A, Saidijam M, Soleimani M, Alikhani MY. Designing a novel ELISA method based on CagA, NapA recombinant antigens to increase sensitivity and specificity of Helicobacter pylori whole cell antigen detection. GASTROENTEROLOGY AND HEPATOLOGY FROM BED TO BENCH 2018; 11:333-342. [PMID: 30425813 PMCID: PMC6204246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Accepted: 09/18/2018] [Indexed: 11/23/2022]
Abstract
AIM In this research, we designed a direct Enzyme Linked Immunoassay method to detect Helicobacter pylori antigens in stool specimens. BACKGROUND Helicobacter pylori infection as the worldwide problem is related to many gastrointestinal disorders such as gastritis, gastric cancer, non-ulcer disease, peptic ulcer disease and duodenal ulcer. METHODS We produced and purified recombinant CagA and NapA antigens in Escherichia coli and extracted their antibodies from a panel of positive sera specimens. We designed a novel enzyme linked immunoassay direct method in combination with the whole cell for the qualitative and quantitative detection of Helicobacter pylori antigens in human stool. Assay performance was evaluated by histopathology staining and urease activity. RESULTS The sensitivity and specificity of assay was determined as 91.7 [95% confidence interval: 89.3-95.6%] and 93.1% [95% CI: 91.2-96.4%], respectively. Novel ELISA exhibits enhanced sensitivity and specificity of Helicobacter pylori detection in comparison with another commercially available kit. CONCLUSION Combination of the recombinant antigens and whole cell of Helicobacter pylori in immunoassay designing is a new approach about early diagnosis, treatment and fallowing up of the Helicobacter pylori infected patients, especially in peptic cancer cases.
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Affiliation(s)
- Farideh Kamarehei
- Department of Microbiology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Alireza Khabiri
- Diagnostic Biotechnology Unit, Research and Production Complex, Pasteur Institute of Iran, Tehran, Iran
| | - Massoud Saidijam
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Meysam Soleimani
- Department of Pharmaceutical Biotechnology, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mohammad Yousef Alikhani
- Department of Microbiology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
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Functional Cytotoxin Associated Gene A in Helicobacter pylori Strains and Its Association with Integrity of Cag-pathogenicity Island and Histopathological Changes of Gastric Tissue. ARCHIVES OF CLINICAL INFECTIOUS DISEASES 2017. [DOI: 10.5812/archcid.62955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Bagheri N, Azadegan-Dehkordi F, Rafieian-Kopaei M, Rahimian G, Asadi-Samani M, Shirzad H. Clinical relevance of Helicobacter pylori virulence factors in Iranian patients with gastrointestinal diseases. Microb Pathog 2016; 100:154-162. [PMID: 27666510 DOI: 10.1016/j.micpath.2016.09.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 09/21/2016] [Accepted: 09/21/2016] [Indexed: 12/21/2022]
Abstract
Helicobacter pylori (H. pylori) usually colonizes the gastric mucosa of more than 50% of the human population, causing an infection that may appear in early childhood and can persist for life. H. pylori is suggested as the main cause of peptic ulcer and chronic gastritis. It is also associated with gastric cancer. Its severity and symptoms depend on environmental factors, host susceptibility and bacterial components, which allow H. pylori to switch between commensalism and pathogenicity. H. pylori is genetically highly variable, and the variability which affects H. pylori virulence factors might be useful in identifying the strains with different degrees of pathogenicity. The geographic distribution of distinct H. pylori genotypes is largely unknown and should be established. The prevalence of more pathogenic genotypes in certain areas may have important epidemiological consequences. It also might be associated with the severity of H. pylori related diseases in such regions. Given that Iran is located in the Middle East and Asian populations have revealed high levels of gastric cancer, it is of clinical interest to clarify the potential of H. pylori virulence markers in predicting the associated clinical outcomes. In this review, clinical relevance of adhesion molecules and significant virulence factors of H. pylori in Iranian patients with gastrointestinal diseases are discussed in comparison to other countries.
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Affiliation(s)
- Nader Bagheri
- Cellular and Molecular Research Center, Shahrekord University of Medical Sciences, Shahrekord, Iran; Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | | | | | - Ghorbanali Rahimian
- Department of Internal Medicine, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Majid Asadi-Samani
- Medical Plants Research Center, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Hedaytollah Shirzad
- Cellular and Molecular Research Center, Shahrekord University of Medical Sciences, Shahrekord, Iran.
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15
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Hajimiri ES, Masoomi M, Ebrahimzadeh N, Fateh A, Hadizadeh Tasbiti A, Rahimi Jamnani F, Bahrmand AR, Mirsaeidi M, Vaziri F, Siadat SD. High prevalence of Mycobacterium tuberculosis mixed infection in the capital of moderate tuberculosis incidence country. Microb Pathog 2016; 93:213-8. [PMID: 26944666 DOI: 10.1016/j.micpath.2016.02.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 02/24/2016] [Accepted: 02/26/2016] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Recent studies using molecular epidemiological techniques have demonstrated mixed infection with multiple strains of Mycobacterium tuberculosis especially in countries with high tuberculosis (TB) burden. We aimed to determine the prevalence of mixed infection among patients with TB in the capital of Iran as a country with moderate incidence rate. METHODS Samples were collected randomly from January 2011 to December 2013 in Tehran, capital of Iran. A total of 75 M. tuberculosis isolates were genotyped by 24 loci mycobacterial interspersed repetitive unit-variable number tandem repeat typing (MIRU-VNTR) for screening the mixed infection. RESULTS Twenty patients (20/75) were identified with mixed infection, and the estimated rate of mixed infection was 26.6%. Thirteen out of the 24 loci were able to detect the mixed infection in our study. CONCLUSIONS Mixed infections occur at high prevalence among studied Iranian TB patients. Further research is inevitable to evaluate the association of mixed infection and disease progression and treatment.
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Affiliation(s)
- Elahe Sadat Hajimiri
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran; Department of Microbiology, Zanjan Branch, Islamic Azad University, Zanjan, Iran
| | - Morteza Masoomi
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran; Department of Microbiology, Qom Branch, Islamic Azad University, Qom, Iran
| | - Nayereh Ebrahimzadeh
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran
| | - Abolfazl Fateh
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran; Microbiology Research Center (MRC), Pasteur Institute of Iran, Tehran, Iran
| | | | - Fatemeh Rahimi Jamnani
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran; Microbiology Research Center (MRC), Pasteur Institute of Iran, Tehran, Iran
| | - Ahmad Reza Bahrmand
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran
| | - Mehdi Mirsaeidi
- Division of Pulmonary and Critical Care, University of Miami, Miami, FL, USA
| | - Farzam Vaziri
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran; Microbiology Research Center (MRC), Pasteur Institute of Iran, Tehran, Iran.
| | - Seyed Davar Siadat
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran; Microbiology Research Center (MRC), Pasteur Institute of Iran, Tehran, Iran
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16
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Farzi N, Malekian T, Alebouyeh M, Vaziri F, Zali MR. Genotype Diversity and Quasispecies Development of Helicobacter pylori in a Single Host. Jpn J Infect Dis 2016; 68:176-80. [PMID: 25672355 DOI: 10.7883/yoken.jjid.2014.165] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Infection with different strains of Helocobacter pylori and emergence of new genomic variants during their long-term gastric colonization are assumed to be the main reasons for eradication failure. We used genotyping and arbitrarily primed PCR fingerprinting (RAPD) to detect relatedness and genetic variations among H. pylori single isolates from each patient in Iran. Multiplex-PCR amplification of gene alleles encoding the virulence factors vacA (m/s), cagA, and iceA (A1/A2) and comparison of RAPD patterns of different singles colonies were performed for each individual patient's isolate. Results showed a high frequency of diversity among the H. pylori strains. Nearly 23% of infected patients showed a single type infection. The infection types related, unrelated, and related/unrelated were found among 25.6%, 12.8%, and 38.5% of patients, respectively. Both mixed type infections (77%) and quasispecies development (15.4%) were detected in these patients. Genotype conversion among vacA (41.6%), cagA (41.6%), and iceA (50%) alleles was observed for the strains with identical or related RAPD patterns. Coevolution of different alleles was also detected in a patient infected with strains presenting the same RAPD patterns. Collectively, results of this study revealed the occurrence of quasispecies development, mixed type infections, and changes in virulence properties of H. pylori strains among the studied patients.
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Affiliation(s)
- Nastaran Farzi
- Foodborne and Waterborne Diseases Research Center; Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Tehran
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17
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Honarmand-Jahromy S, Siavoshi F, Malekzadeh R, Sattari TN, Latifi-Navid S. Multiple repeats of Helicobacter pylori CagA EPIYA-C phosphorylation sites predict risk of gastric ulcer in Iran. Microb Pathog 2015; 89:87-92. [DOI: 10.1016/j.micpath.2015.09.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 09/16/2015] [Accepted: 09/21/2015] [Indexed: 12/14/2022]
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18
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Analysis of the intactness of Helicobacter pylori cag pathogenicity island in Iranian strains by a new PCR-based strategy and its relationship with virulence genotypes and EPIYA motifs. INFECTION GENETICS AND EVOLUTION 2015. [PMID: 26205689 DOI: 10.1016/j.meegid.2015.07.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Variants of the Helicobacter pylori cag pathogenicity island (cagPAI) and certain virulence genotypes have been proposed to be associated with different gastric disorders. In the present study, we designed a new PCR-based strategy to investigate the intactness of cagPAI in Iranian patients using highly specific primer sets spanning the cagPAI region. The possible relationship between the cagPAI status of the strains and clinical outcomes was also determined. We also characterized virulence genotypes (cagL, cagA, vacA, babA2 and sabA) and variants of CagA EPIYA motifs in these strains. H. pylori was detected in 61 out of 126 patients with various gastroduodenal diseases. The cagL, cagA, vacA s1m1, vacA s1m2, vacA s2m2, babA2, and sabA genotypes were detected in 96.7%, 85.2%, 29.5%, 45.9%, 24.6%, 96.7%, and 83.6% of the strains, respectively. Among the 52 cagA-positive strains, EPIYA motifs ABC, ABCC, ABCCC, and mixed types were orderly detected in the 39, 7, 1, and 5 strains. The cagPAI positivity included both intact and partially deleted, with the overall frequencies of 70.5% and 26.2%, respectively. The majority of the strains from patients with PUD (87.5%), gastric erosion (83.3%) and cancer (80%) presented an intact cagPAI, while a lower frequency of cagPAI intactness was detected in gastritis patients (61.1%). However, no significant relationship was found between the possession of intact cagPAI and clinical outcomes. Furthermore, we found that cagA and vacA s1m1 genotypes were significantly correlated with intact cagPAI (P=0.015 and P=0.012). A significant correlation was also found between EPIYA-ABC and intact cagPAI (P=0.010). The proposed PCR-based scheme was found to be useful for determining the intactness of cagPAI. Our findings also indicate that the cagPAI appears to be intact and rather conserved in majority of Iranian strains. Finally, our study proposed that H. pylori strains with partially deleted cagPAI were less likely to cause severe diseases in comparison with those carrying intact cagPAI.
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19
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Kocazeybek BS, Caliskan R, Erdamar Cetin S, Ergin S, Kuskucu M, Kepil N, Oyku Dinc H, Ziya Erzin Y, Saribas S, Bahar Tokman H, Kalayci F, Akgul O, Yuksel P, Karakullukcu A, Ziver T, Sirekbasan S, Caglar E, Bal K. Patterns of EPIYA motifs among cagA-positive Helicobacter pylori strains: a case-control study in a Turkish population with Eurasian geographical features. J Med Microbiol 2015. [PMID: 26198695 DOI: 10.1099/jmm.0.000141] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Geographical variation in the frequency of various gastroduodenal pathologies was shown to be related to the geographical diversity of H. pylori CagA Glu-Pro-Ile-Tyr-Ala (EPIYA) patterns. We examined the EPIYA patterns of H. pylori and the association of EPIYA patterns with gastric cancer (GC) for the first time, to the best of our knowledge, in Turkey. The patient group (PG) contained 60 patients [38 GC and 22 duodenal ulcer (DU) patients]. The control group (CG) was 110 individuals [94 gastritis patients and 16 persons with a normal gastrointestinal system (NGIS)]. Specific primers were used for the detection of cagA including empty-site-positive and EPIYA-A, -B, -C, -D PCR. Bands of EPIYA-A, -B, -C were confirmed by DNA sequencing. One hundred and forty-two (83.5 %) strains [60 in the PG (38 GC, 22 DU), 82 in the CG (72 gastritis, 10 NGIS)] were positive for the cagA gene. EPIYA-C with multiple repeats was detected in 34 (23.9 %) strains, and 22 (64.7 %) were from GC patients. EPIYA-C with one repeat was detected in 89 (62.7 %) strains, and 54 (60.7 %) were from gastritis patients. EPIYT was detected in 10 strains, and EPIYA-D was not detected. The number of EPIYA-C with multiple repeats was significantly higher for the PG than for the CG (P < 0.0001). In GC patients, the number of EPIYA-C with multiple repeats was significantly higher than one repeat (P < 0.0001). In conclusion, our study showed that multiple EPIYA-C repeats increases the GC risk by 30.6-fold and the DU risk by 8.9-fold versus the CG. This indicates that Western-type H. pylori strains in Turkey have similar EPIYA motifs to those of neighbouring countries and Western populations.
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Affiliation(s)
- Bekir Sami Kocazeybek
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Reyhan Caliskan
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Sibel Erdamar Cetin
- 2 Department of Medical Pathology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Sevgi Ergin
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Mert Kuskucu
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Nuray Kepil
- 2 Department of Medical Pathology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Harika Oyku Dinc
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Yusuf Ziya Erzin
- 3 Department of Gastroenterology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Suat Saribas
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Hrisi Bahar Tokman
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Fatma Kalayci
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Ozer Akgul
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Pelin Yuksel
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Asiye Karakullukcu
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Tevhide Ziver
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Serhat Sirekbasan
- 1 Department of Medical Microbiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Erkan Caglar
- 3 Department of Gastroenterology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Kadir Bal
- 3 Department of Gastroenterology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
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20
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Haddadi MH, Bazargani A, Khashei R, Fattahi MR, Bagheri Lankarani K, Moini M, Rokni Hosseini SMH. Different distribution of Helicobacter pylori EPIYA- cagA motifs and dupA genes in the upper gastrointestinal diseases and correlation with clinical outcomes in iranian patients. GASTROENTEROLOGY AND HEPATOLOGY FROM BED TO BENCH 2015; 4:107-17. [PMID: 26171136 DOI: 10.1016/j.ccep.2012.02.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
AIM Our aim was to determine the EPIYA-cagA Phosphorylation sites and dupA gene in H. pylori isolates among patients with upper gastrointestinal diseases. BACKGROUND Pathogenicity of the cagA-positive Helicobacter pylori is associated with EPIYA motifs and higher number of EPIYA-C segments is a risk factor of gastric cancer, while duodenal ulcer-promoting gene (dupA) is determined as a protective factor against gastric cancer. PATIENTS AND METHODS A total of 280 non-repeated gastric biopsies obtained from patients undergoing endoscopy from January 2013 till July 2013. Samples were cultured on selective horse blood agar and incubated in microaerophilic atmosphere. The isolated organisms were identified as H. pylori by Gram staining and positive oxidase, catalase, and urease tests. Various motif types of cagA and the prevalence of dupA were determined by PCR method. RESULTS Out of 280 specimens, 128 (54.7%) isolated organisms were identified as H. pylori. Of 120 H. pylori isolates, 35.9% were dupA positive and 56.26% were cagA positive, while cagA with ABC and ABCC motifs were 55.5% and 44.5%, respectively. Fifty six percent of the isolates with the ABCC motif have had dupA genes. We also found a significant association between strains with genotypes of dupA-ABC and duodenal ulcer disease (p = 0.007). CONCLUSION The results of this study showed that the prevalence of cagA-positive H. pylori in Shiraz was as high as in western countries and higher numbers of EPIYA-C segments were seen in gastric cancer patients. We may also use dupA as a prognostic and pathogenic marker for duodenal ulcer disease and cagA with the segment C for gastric cancer and gastric ulcer disease in this region.
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Affiliation(s)
- Mohammad Hossein Haddadi
- Department of Bacteriology and Virology, Shiraz Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Abdollah Bazargani
- Department of Bacteriology and Virology, Shiraz Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Reza Khashei
- Department of Bacteriology and Virology, Shiraz Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohammad Reza Fattahi
- Department of Internal Medicine, Gastroenterohepatology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Kamran Bagheri Lankarani
- Department of Internal Medicine, Gastroenterohepatology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Moini
- Department of Internal Medicine, Gastroenterohepatology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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Vaziri F, Peerayeh SN, Alebouyeh M, Maghsoudi N, Azimzadeh P, Siadat SD, Zali MR. Novel effects of Helicobacter pylori CagA on key genes of gastric cancer signal transduction: a comparative transfection study. Pathog Dis 2014; 73:ftu021. [PMID: 25743471 DOI: 10.1093/femspd/ftu021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Helicobacter pylori (H. pylori) infection is now recognized as a worldwide problem. Helicobacter pylori CagA is the first bacterial oncoprotein to be identified in relation to human cancer. Helicobacter pylori CagA is noted for structural diversity in its C-terminal region (contains EPIYA motifs), with which CagA interacts with numerous host cell proteins. Deregulation of host signaling by translocated bacterial proteins provides a new aspect of microbial-host cell interaction. The aim of this study is to compare the cellular effects of two different CagA EPIYA motifs on identified signaling pathways involve in gastric carcinogenesis. To investigate the effects of CagA protein carboxyl region variations on the transcription of genes involved in gastric epithelial carcinogenesis pathways, the eukaryotic vector carrying the cagA gene (ABC and ABCCC types) was transfected into gastric cancer cell line. The 42 identified key genes of signal transduction involved in gastric cancer were analyzed at the transcription level by real-time PCR. The results of real-time PCR provide us important clue that the ABCCC oncoprotein variant can change the fate of the cell completely different from ABC type. In fact, these result proposed that the ABCCC type can induce the intestinal metaplasia, IL-8, perturbation of Crk adaptor proteins, anti-apoptotic effect and carcinogenic effect more significantly than ABC type. These data support our hypothesis of a complex interaction of host cell and these two different H. pylori effector variants that determines host cellular fate.
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Affiliation(s)
- Farzam Vaziri
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, P.O. Box: 19835-187, Tehran, Iran Department of Bacteriology, Pasteur Institute of Iran, P.O. Box: 1316943551, Tehran, Iran Department of Bacteriology, School of Medical Sciences, Tarbiat Modares University, P.O. Box: 14115-331, Tehran, Iran
| | - Shahin N Peerayeh
- Department of Bacteriology, School of Medical Sciences, Tarbiat Modares University, P.O. Box: 14115-331, Tehran, Iran
| | - Masoud Alebouyeh
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, P.O. Box: 19835-187, Tehran, Iran
| | - Nader Maghsoudi
- Neuroscience Research Center (NRC) and Neurobiology Research Center, Shahid Beheshti University of Medical Sciences, P.O. Box: 19615-1178, Tehran, Iran
| | - Pedram Azimzadeh
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, P.O. Box: 19835-187, Tehran, Iran
| | - Seyed D Siadat
- Department of Bacteriology, Pasteur Institute of Iran, P.O. Box: 1316943551, Tehran, Iran
| | - Mohammad R Zali
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, P.O. Box: 19835-187, Tehran, Iran
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Alebouyeh M, Vaziri F, Peerayeh SN, Siadat SD. A letter to the editor comment on: Five-year monitoring of considerable changes in tyrosine phosphorylation motifs of the Helicobacter pylori cagA gene in Iran. J Appl Genet 2014; 56:147. [PMID: 25323795 DOI: 10.1007/s13353-014-0248-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Accepted: 09/15/2014] [Indexed: 11/29/2022]
Affiliation(s)
- Masoud Alebouyeh
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Five year monitoring of considerable changes in tyrosine phosphorylation motifs of Helicobacter pylori cagA gene in Iran. J Appl Genet 2014; 56:149-50. [PMID: 25297536 DOI: 10.1007/s13353-014-0249-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 09/15/2014] [Indexed: 10/24/2022]
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