scholarly journals Association of TP53 gene codon 72 polymorphism with Helicobacter pylori-positive non-cardia gastric cancer in Vietnam

2019 ◽  
Vol 13 (11) ◽  
pp. 984-991
Author(s):  
Thi Minh Thi Ha ◽  
Thanh Nha Uyen Le ◽  
Viet Nhan Nguyen ◽  
Van Huy Tran
Keyword(s):  
Gastric Cancer ◽  
Control Group ◽  
Rapid Urease Test ◽  
Genotype Distribution ◽  
Codon 72 ◽  
Codon 72 Polymorphism ◽  
Urease Test ◽  
Significant Difference ◽  
Tp53 Codon 72 Polymorphism ◽  
H Pylori

Introduction: This research aimed to determine the association of the combination of H. pylori infection and TP53 codon 72 polymorphism with non-cardia gastric cancer (GC) in Vietnam. Methodology: A total of 164 patients with non-cardia GC and 164 patients with peptic ulcer disease or functional dyspepsia in controls matched by sex and age were enrolled. H. pylori infection was diagnosed by rapid urease test and polymerase chain reaction (PCR). The cagA gene-positivity and vacA sm subtypes were determined by multiplex PCR. Genotypes of TP53 codon 72 polymorphism were determined by PCR-restriction fragment length polymorphism. Results: The prevalence of H. pylori infection in GC and control group were 61.6% and 55.4%, respectively. The rates of cagA-positive strains in the two H. pylori-positive groups were 80.2% and 71.4%, respectively. There was no statistically significant difference in TP53 codon 72 genotype distribution between GC group (frequencies of Arg/Arg, Arg/Pro and Pro/Pro genotypes were 31.1%, 43.3% and 25.6%, respectively) and controls (29.3%, 52.4% and 18.3%, respectively), p = 0.172. The significant difference in genotype distribution was observed in recessive model (Pro/Pro vs Arg/Arg + Arg/Pro) when stratifying by H. pylori infection (OR = 2.02, 95% CI 1.03–3.96, p = 0.041) and by cagA-positivity (OR = 2.33, 95% CI 1.07–5.07, p = 0.032). Conclusions: This study suggests a synergistic interaction between H. pylori infection, especially cagA-positive H. pylori, and Pro/Pro genotype of TP53 codon 72 polymorphism might play a significant role in the pathogenesis of GC in the Vietnamese population.

scholarly journals Virulence genes of Helicobacter pylori in the Dominican Republic

2014 ◽  
Vol 63 (9) ◽  
pp. 1189-1196 ◽  
Author(s):  
Seiji Shiota ◽  
Modesto Cruz ◽  
José A. Jiménez Abreu ◽  
Takahiro Mitsui ◽  
Hideo Terao ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Helicobacter Pylori ◽  
Peptic Ulcer ◽  
Dominican Republic ◽  
Infection Rate ◽  
Rapid Urease Test ◽  
Test Culture ◽  
Urease Test ◽  
The Status ◽  
H Pylori

Although the incidence of gastric cancer in the Dominican Republic is not high, the disease remains a significant health problem. We first conducted a detailed analysis of Helicobacter pylori status in the Dominican Republic. In total, 158 patients (103 females and 55 males; mean age 47.1±16.2 years) were recruited. The status of H. pylori infection was determined based on four tests: rapid urease test, culture test, histological test and immunohistochemistry. The status of cagA and vacA genotypes in H. pylori was examined using PCR and gene sequencing. The overall prevalence of H. pylori infection was 58.9 %. No relationship was found between the H. pylori infection rate and the age range of 17–91 years. Even in the youngest group (patients aged <29 years), the H. pylori infection rate was 62.5 %. Peptic ulcer was found in 23 patients and gastric cancer was found in one patient. The H. pylori infection rate in patients with peptic ulcer was significantly higher than that in patients with gastritis (82.6 versus 54.5 %, P<0.01). The cagA-positive/vacA s1m1 genotype was the most prevalent (43/64, 67.2 %). Compared with H. pylori-negative patients, H. pylori-positive patients showed more severe gastritis. Furthermore, the presence of cagA was related to the presence of more severe gastritis. All CagA-positive strains had Western-type CagA. In conclusion, we found that H. pylori infection is a risk factor for peptic ulcer in the Dominican Republic. Patients with cagA-positive H. pylori could be at higher risk for severe inflammation and atrophy.

scholarly journals Comparing Multiplex PCR and Rapid Urease Test in the Detection ofH. pyloriin Patients on Proton Pump Inhibitors

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Thomas Chen ◽  
Xiangwen Meng ◽  
H. Zhang ◽  
Rebecca W. Tsang ◽  
Tat-Kin Tsang
Keyword(s):  
Multiplex Pcr ◽  
Diagnostic Value ◽  
Control Group ◽  
Rapid Urease Test ◽  
Negative Results ◽  
Multiplex Pcr Assay ◽  
Time Period ◽  
Urease Test ◽  
H Pylori ◽  
The One

Background. This study was conducted to assess the diagnostic value of a multiplex PCR assay to detectH. pyloriinfection and to further evaluate the negative results from the CLOtest on patients with and without PPI treatment. Methods. This study is a retrospective cohort that included 457 patients with symptoms of dyspepsia, who underwent upper endoscopy at Evanston and Glenbrook Northshore Hospital from June 2003 to October 2007. A total of 556 samples were reported with some patients having more than one test over the time period. The CLOtest was performed first on the gastric specimen and from that specimen, the DNA was isolated and the one-step multiplex PCR was performed.Results. By M-PCR testing, H. pyloriwas detected in 143 (52.2%) of 274 cases in the control group and 130 (46.1%) of 282 cases in patients on PPI treatment (P=0.1746). The CLOtest detected the presence ofH. pyloriin 4 (1.4%) of 282 cases from the same group receiving PPI treatment and 29 (10.6%) of 274 cases from the group not taking a PPI (P≤0.0001).Conclusion. Our PCR is sensitive enough to detect the presence ofH. pyloridespite being on PPI treatment.

scholarly journals GENDER, AGE, ENDOSCOPIC FINDINGS, UREASE AND HELICOBACTER PYLORI: ALL UNCORRELATED WITHIN A SAMPLE OF A HIGH GASTRIC CANCER PREVALENCE POPULATION IN AMAZON

2019 ◽  
Vol 56 (3) ◽  
pp. 264-269
Author(s):  
Ariney Costa de MIRANDA ◽  
Cássio CALDATO ◽  
Mira Nabil SAID ◽  
Caio de Souza LEVY ◽  
Claudio Eduardo Corrêa TEIXEIRA ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Helicobacter Pylori ◽  
Cross Sectional Study ◽  
Upper Gastrointestinal Endoscopy ◽  
Histopathological Analysis ◽  
Rapid Urease Test ◽  
Cross Sectional ◽  
Cancer Prevalence ◽  
Urease Test ◽  
H Pylori

ABSTRACT BACKGROUND: It is widely assumed that gender, age, gastritis and Helicobacter pylori , all have some degree of correlation and, therefore, can synergistically lead to the development of gastric cancer. OBJECTIVE: In this cross-sectional study, we expected to observe the above mentioned correlation in the analysis of medical records of 67 patients of both sexes (female, n=44), mean age ± standard deviation: 41±12 years old, all from Belém (capital of Pará State, Brazilian Amazon), a city historically known as one with the highest gastric cancer prevalence in this country. METHODS: All patients were submitted to upper gastrointestinal endoscopy for gastric biopsy histopathological analysis and rapid urease test. All diagnoses of gastritis were recorded considering its topography, category and the degree of inflammatory activity, being associated or not associated with H. pylori infection. RESULTS: The results show that no statistically relevant associations were found among the prevalences of the observed variables. CONCLUSION: The authors hypothesize that observed risk factors associated to gastric cancer might be lesser synergistic than is usually expected.

scholarly journals Helicobacter pylori infection in patients undergoing upper endoscopy at University Hospital in Uberaba, Minas Gerais, Brazil.

2013 ◽  
Vol 4 (1) ◽  
pp. 33-35 ◽  
Author(s):  
Fernanda Machado Fonseca ◽  
Renata Margarida Etchebehere ◽  
Adriana Gonçalves Oliveira
Keyword(s):  
Helicobacter Pylori ◽  
Breath Test ◽  
Histological Study ◽  
Rapid Test ◽  
University Hospital ◽  
Rapid Urease Test ◽  
Duodenal Ulcers ◽  
Urease Test ◽  
Significant Difference ◽  
H Pylori

Helicobacter pylori is a Gram negative bacterium that cause chronic gastritis, duodenal ulcers and can predispose the gastric cancer. The study aimed to determinate the prevalence of H. pylori infection by different methods of diagnosis in patients submitted to endoscopy. Of the 145 patients included in the study, were collected fragments of gastric mucosa for histological analysis, and for the rapid urease test. The breath test was also performed. The H. pylori infection was detected in 84 (57.9%) patients by histological study, the rapid test of urease was positive in 81 (55,8%) and the breath test in 62 (56,3%). There was no statistically significant difference when comparing the prevalence of infection by different methods of diagnosis. The prevalence of H. pylori infection in our community was lower than that found in the literature for patients with age similar to this study (mean = 53.19 years).

THE ASSOCIATION OF THE COMBINATION OF TP53 GENE CODON 72 POLYMORPHISM AND HELICOBACTER PYLORI INFECTION WITH GASTRIC CANCER

2017 ◽  
pp. 47-52
Author(s):  
Thi Minh Thi Ha ◽  
Van Huy Tran ◽  
Viet Nhan Nguyen
Keyword(s):  
Gastric Cancer ◽  
Helicobacter Pylori ◽  
Risk Factor ◽  
Tp53 Gene ◽  
Codon 72 ◽  
Codon 72 Polymorphism ◽  
Pcr Rflp ◽  
Two Factors ◽  
Risk Patients ◽  
H Pylori

Background: The interaction of environment factor and host factor plays the important role in the pathogenesis of gastric cancer (GC). This study aimed to evaluate the association of the combination of TP53 gene codon 72 polymorphism and the H. pylori infection with GC risk. Patients and methods: 112 patients with GC and 136 patients without GC were extracted DNA from specimens of gastric mucosa, then were determined TP53 gene codon 72 polymorphism by PCR-RFLP and diagnosed H. pylori infection by PCR with ureC gene-specific primers. Results: There was no significant association between TP53 gene codon 72 polymorphism and GC risk, as well as between H. pylori infection and GC risk. The combination of two factors (TP53 gene codon 72 polymorphism and H. pylori infection) was found to be associated with GC risk: The combination of Pro/Pro genotype and H. pylori (+) was the GC risk factor, OR = 2.62 (95%CI: 1.20–5.71) as compared to other combinations. In the group of H. pylori-positive patients, Pro/Pro genotype was the GC risk factor, OR = 2.42 (95%CI: 1.05 – 5.59) as compared to (Arg/Arg + Arg/Pro) group, and OR = 3.48 (95%CI: 1.23 – 9.78) as compared to Arg/Arg genotype. Conclusion: The factors of TP53 gene codon 72 polymorphism and H. pylori infection were not associated with GC risk as assessed separately, but they had the interaction associated with GC risk. Key words: TP53 gene codon 72 polymorphism, Helicobacter pylori, gastric cancer

Polymorphism of p53 Codon 72 Gene on Cervical Cancer Incidence in Malay Population

2020 ◽  
Vol 1 (1) ◽  
pp. 25-30
Author(s):  
Lusia Hayati ◽  
Siska Delvia
Keyword(s):  
Cervical Cancer ◽  
Control Group ◽  
Case Group ◽  
P53 Codon 72 ◽  
Codon 72 ◽  
Codon 72 Polymorphism ◽  
Significant Difference ◽  
Malay Population ◽  
And Control

In Indonesia, the cases of cervical cancer are estimated at around 50 per 100.000 people. It wasestimatedthattherearemore than1 millionwomenworldwidewho have cervical cancer,andmostofthemhavenot been diagnosed yet or do not have access to screening and medical treatment. P53 codon 72polymorphism can affect the risk of cervical cancerthrough the regulationofproliferationandcellapoptosis.Thepurpose of this research was to investigate the association between p53 codon 72 polymorphism and cases ofcervical cancer. This research was observational analytic research. The research was done by examining in thelaboratory of Molecular Biology, Faculty of Medicine, Universitas Sriwijaya by using a case-control studyapproach.Thesampleoftheresearchconsistedof 70subjects,andtheyweredividedintotwogroups:35in casegroup and 35 in the control group. The determination of genotype and allotype was done by using PCR-RFLPtechnics. The results of the research showed there was a significant difference between p53 codon 72polymorphism between the case group and control group. The results of genotypes of p53 codon 72polymorphism in the case group were seven respondents (20.0%) with Pro/Pro genotype, five respondents(14.3%) with Arg/Arg genotype, and 23 respondents (65.7%) with Pro/Arg. While in control group, there were 28respondents (80.0%) with Pro/Pro genotype, 0 respondent (0.0%) with Arg/Arg genotype, and 7 respondents(20%) with Pro/Arg. The frequency of the Prolin allele in case group was 37 (52.9%), and the Arginin allele was 33(47.1%), while the frequency of the Prolin allele in the control group was 63 (90%), and the Arginin allele was 7(10%).TheChi-Squareofgenotypewas valued0.000,OR1,304andCI95%1,071-5,891,whiletheallelewas valued0.000,OR8.027 andCI95% 3.228-19.962. Therewas an associationbetweengenotypeand allele of p53 codon72polymorphismandcasesofcervicalcancer

A new understanding of the H. pylori eradication mechanism

2019 ◽  
Author(s):  
Shanshan Su ◽  
Guo-qi Zheng ◽  
Ying-ying Liu ◽  
Yu-fei Liang ◽  
Hui Song ◽  
...  
Keyword(s):  
Gastric Juice ◽  
Intervention Group ◽  
Control Group ◽  
Rapid Urease Test ◽  
Mucus Layer ◽  
Culture Methods ◽  
Detection Rates ◽  
Urease Test ◽  
Gastric Lumen ◽  
H Pylori

Abstract Background: Helicobacter pylori (H. pylori) cannot usually be detected in the gastric juice and it is thought that H. pylori may be implanted under the mucus layer for long term. The mechanisms of action of proton pump inhibitor (PPI), antibiotics, and bismuth for H. pylori eradication are not entirely clear. Our study aimed to determine the role of PPI on the movement of H. pylori across the mucus layer to the gastric lumen and the mechanism of PPI, antibiotics, and bismuth on H. pylori eradication. Methods: Patients with H. pylori infection were intravenous injected with PPI (intervention group, n=31) or without PPI (control group, n=37). The presence of H. pylori in the gastric juice was evaluated by the rapid urease test (RUT), polymerase chain reaction (PCR), and culture methods. Results: The H. pylori positive detection rates were all significantly higher among patients in the intervention group than among patients in the control group by the RUT (P < 0.0001), PCR (P < 0.0001), and culturing (P = 0.0386). Conclusion: H. pylori can penetrate across the mucus layer to the gastric lumen following PPI intervention. The direct antimicrobial activity of PPI might because of diminished numbers of H. pylori due to probiotics in the gastric lumen. Antibiotics and bismuth might play a local sterilization role in the gastric lumen when H. pylori penetrate across the mucus layer.

scholarly journals Relevance of examination and treatment of the most common gastrointestinal disorders in children in Lithuania during the last decade

Medicina ◽  
2007 ◽  
Vol 44 (1) ◽  
pp. 72 ◽  
Author(s):  
Liutauras Labanauskas ◽  
Rūta Kučinskienė ◽  
Vaidotas Urbonas ◽  
Rūta Rokaitė ◽  
Neringa Libikaitė
Keyword(s):  
Duodenal Ulcer ◽  
Atopic Dermatitis ◽  
Abdominal Pain ◽  
Skin Rash ◽  
Endoscopic Examination ◽  
Gastrointestinal Disorders ◽  
Control Group ◽  
Rapid Urease Test ◽  
Urease Test ◽  
H Pylori

In the last decade, scientific studies in the field of children’s gastroenterology performed in Lithuania explored different problems: pathology of Helicobacter pylori infection and food allergy. Our studies Helirevealed that children with atopic dermatitis had gastrointestinal complaints (abdominal pain, diarrhea, distension and unstable stool, which appeared with the exacerbation of skin rash) more often as compared to nonallergic children of the control group. Abdominal pain in children with atopic dermatitis with local rash was more frequent and lasted longer than in control group children, whereas children with extended rash had stools more frequently. Gastrointestinal disorders in children with atopic dermatitis statistically significantly did not depend on the extent of skin rash and severity of atopic dermatitis. In our scientific research on the importance of H. pylori infection on children’s gastrointestinal system, children with chronic dyspepsia were examined. Endoscopy, rapid urease test, biopsies from antrum and corpus of stomach and their histological examination as well as serologic tests were done. According to the results obtained, we recommend to examine children with chronic dyspepsia in a complex way: not only endoscopic examination, but H. pylori diagnostic tests should be performed as well. Serologic test is not suitable for screening H. pylori infection in children. Considering this, we recommend to use no fewer than two different methods to diagnose this infection. The highest frequency of H. pylori infection was found in children with duodenal ulcer; histological changes in their gastric pylorus and corpus mucosa were greatest. More than half of children with nonulcer dyspepsia were infected with H. pylori. After eradication of H. pylori infection, the prevalence of dyspepsia in children with duodenal ulcer decreased.

scholarly journals Association of cagA, cagC, virB2, and vacA Subtypes of Helicobacter pylori with Adenocarcinoma Development in Iranian Patients

2020 ◽  
Vol 13 (7) ◽  
Author(s):  
Pouya Khodadadi ◽  
Mohammad Kargar ◽  
Mahdi Bijanzadeh ◽  
Abbas Doosti ◽  
Shapoor Aghaei
Keyword(s):  
Helicobacter Pylori ◽  
Gastric Ulcers ◽  
Rapid Urease Test ◽  
Genotype Distribution ◽  
Caga Gene ◽  
Group I ◽  
Two Samples ◽  
Urease Test ◽  
H Pylori ◽  
Iranian Patients

Background: Gastric cancer has been introduced as the second cause of cancer death worldwide. Helicobacter pylori infection is considered one of the main risk factors for this type of cancer, so that it has been classified as group I carcinogens. Objectives: The present research intended to examine the prevalence of cagA, cagC, virB2, vacA, and genotype distribution in H. pylori-infected biopsies and adenocarcinoma cases. Methods: Thirty-four H. pylori gastric biopsies taken from Western Iranian patients that were diagnosed as gastritis, gastric ulcers, and adenocarcinoma were used in this study. Two samples were taken from each patient. These samples were selected based on endoscopic observations and histological examinations. The presence of H. pylori was confirmed by the Rapid Urease test (RUT) and the ureC gene by the polymerase chain reaction (PCR) technique. Then, specific primers for vacA and cagPAI were used for genotyping H. pylori by PCR-typing. Results: The obtained results showed that 86.8% of the samples were H. pylori-positive. Moreover, the cagA gene prevalence was 51.50% in the samples. In addition, the adenocarcinoma outcome was significantly related to all selected genes. Likewise, some gastric diseases such as gastric ulcers, duodenal ulcer (DU), gastritis, lymphoid, and gastroesophageal reflux disease (GERD) were observed in adenocarcinoma cases. It was also found that the vacAs1m1i1 genotype plays an important role in gastric malignancies. The most frequent vacA genotype in the H. pylori-infected isolates was s1m1i1, and the observed frequency of vacA and cagA genes in adenocarcinoma was statistically significant. Conclusions: The findings showed that H. pylori vacA and cagA gene virulence factors are associated with adenocarcinoma in Western Iranian patients.

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