View clinical trials related to Gastritis.
Filter by:Subjects who are included will recieve Hp eradication therapy based on antimicrobial susceptibility test. After the therapy, the subjects will be divided into two groups, the successful group and the failure group. And then they wiil be followed up to observe the development of the gastric mucosa pathology.
The study is aimed to determine the potential of volatile marker testing for gastric cancer screening. The study will be addressing the role of confounding factors, including lifestyle factors, diet, smoking as well as addressing the potential role of microbiota in the composition of exhaled volatile markers.
Helicobacter pylori (H. pylori) gastritis is a common bacterial infection among the elderly population. H. pylori infection causes chronic progressive gastric inflammation, peptic ulcer disease and gastric cancer. Gastric cancer is a significant contributor of cancer-related mortality. The eradication of H. pylori reduces the incidence of gastric cancer. However, the efficacy of H. pylori eradication has decreased dramatically because of antibiotic resistance. This study aims to (i) compare the eradication rates of H. pylori by triple therapy with vonoprazan for the treatment of H. pylori gastritis) (TTV regimen), with triple therapy with conventional proton pump inhibitor (PPI) (TTP regimen) in a multi-racial Asian cohort, (ii) evaluate the prevalence of antibiotic (klacid/amoxicillin/levofloxacin/tetracycline) resistance in H. pylori infected patients, and (iii) assess the safety of the TTV regimen. Diagnosed H. pylori-infected patients (n=252) will be enrolled and randomized 1:1 to TTV or TTP regimen. Gastric biopsies will be cultured and antibiotic sensitivity evaluated using E-test/agar dilution method. The safety of TTV regimen will be assessed using adverse effect questionnaire. This study may potentially impact on prescribing policies and management of H. pylori infections for improved therapeutic outcome.
Functional dyspepsia (FD) is a common functional gastrointestinal disorder characterized by upper abdominal discomfort/pain and/or symptoms of meal-related fullness/satiety. There is currently no definitive therapy that is beneficial for all FD patients. Accumulating evidence suggests efficacy of tricyclic antidepressants (TCAs) in FD. However, no firm conclusion can be drawn currently due to the relatively small amount of studies and large heterogeneity between studies. In addition, TCAs are often associated with side effects, which occur early after initiation of therapy preceding the therapeutic effect and often result in discontinuation of the therapy. These side effects are related to drug metabolism, which depend on polymorphisms of the cytochrome P (CYP) enzyme system. It is therefore hypothesized that pre-treatment assessment of CYP genotype and subsequent exclusion of abnormal metabolizers limits the occurrence of side-effects and as such improves compliance and efficacy.
To establish prospective cohort of healthy population and corresponding serum sample bank in Sichuan province to provide platform for exploring early diagnosis and screening strategy of gastric cancer by a prospective cohort study.
Chronic atrophic gastritis (CAG) is acknowledged as the precancerous stage of gastric cancer (GC). The present study aims to explore Traditional Chinese Medicine (TCM) syndrome features in different stages of CAG malignant transformation respectively. The proposed study is a cross-sectional study based participant survey conducted in 4 hospitals in Beijing, China. After obtaining informed consent, a total of 2000 study patients will be recruited on-site in hospitals.
In up to half of patients seen by gastroenterologists, routine examinations fail to find an underlying organic, systemic, or metabolic disease that readily explains the symptoms. These patients are referred to as patients with disorders of gastrointestinal function, of which functional dyspepsia (FD) is one of the most common. Despite intensive research to investigate various pathophysiological mechanisms of this disease, the pathogenesis remains obscure. The investigators recently demonstrated increased duodenal permeability in FD patients, as assessed by mounting routine endoscopic duodenal biopsy specimens into Ussing chambers to measure transepithelial electrical resistance and passage of a paracellular fluorescent probe. Impaired intestinal barrier function can lead to increased uptake of luminal substances which can induce an immunological response in the mucosa. Interestingly, using transmission electron microscopy (TEM) in duodenal biopsies, the investigators recently observed the presence of a yet to be identified microorganism inside the epithelium and the lamina propria of a subset of FD patients (unpublished observations), suggesting increased translocation of microorganisms. The aim of the project is to investigate whether FD patients display increased translocation of microorganisms in duodenal biopsies. The investigators will also test the effect of bile acid on translocation of microorganisms and therefore include 20 FD patients and 20 age- and gender-matched healthy volunteers in this study.
Chronic atrophic gastritis (CAG) is acknowledged as the precancerous stage of gastric cancer (GC). The present study aims to developed risk assessment and syndrome evolution models of CAG malignant transformation events combining TCM indicators with modern medicine indicators. The proposed study is a registry study based participant survey conducted in 4 hospitals in Beijing, China. After obtaining informed consent, a total of 2000 study patients diagnosed with CAG will be recruited. 10-year follow-ups are carried out on-site in hospitals and off-site by telephone to track malignant transformation events.
As the resistant rate of the Helicobacter pylori to some common antibiotics was rising，the eradication rate of the Helicobacter pylori with the standard triple therapy failed to exceed 70% in China，and had to drop out of the first-line treatment recommendations. However, with the increase of treatment time, patients burden, adverse reactions of antibiotics or proton pump inhibitor (PPI) will also increase. Resistance to clarithromycin is the major cause of the failure to eradicate Helicobacter pylori. But, in terms of population, there are still more than 70% of the patients with clarithromycin sensitive. Under the guidance with susceptibility test，7-day standard triple therapy could be used. In this study, investigators will select the patients with infection of H. pylori and with clarithromycin sensitive. Eradication of Helicobacter pylori with triple therapy based on accurate susceptibility testing of clarithromycin will be studied. The treatment time will be assigned into 7 days,10 days and 14 days groups. Then, investigators will perform a sequencing for failed treatment patients in groups, such as drug resistance gene mutation, phenotype and genotype. Finally, investigators will compare the differences between the patients with triple therapy and traditional quadruple therapy.The incidence of adverse effects in the eradicate treatment will reduce at least 10% and avoid patients' unnecessary economic losses at least 400RMB per person.
Helicobater pylori plays an important role in the development of gastric cancer. Eradication therapy can reducing the morbidity of gastric cancer, but can't totally prevent it especially when atrophy and more serious precancerous lesions already happened. Prior studies found the gastric bacterial difference among gastritis, intestinal metaplasia and gastric cancer. However, they didn't reach an agreement. Correa's model is widely accepted in the development of gastric cancer. The pathological change makes a more suitable environment for bacteria to overgrowth. This study are designed to analyze the gastric microbial difference of non-atrophic gastritis, atrophic gastritis, intestinal metaplasia, intraepithelial neoplasia and gastric cancer.