Active clinical trials for "Gastritis"

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.

Background: Atrophic gastritis (AG) is the single most important precursor condition for gastric cancer (GC) known so far. H. pylori infection is the most important causative agent of gastritis, and subsequent AG. The GastroPanel test (Biohit HealthCare, Helsinki, Finland), a blood test evaluating the four biomarkers specific for the gastric mucosa pepsinogen I (P-PGI), pepsinogen II (P-PGII), gastrin-17 (P-G-17) and H. pylori antibody (P-HpAb), is the first non-invasive diagnostic tool providing possibilities for detecting the patients at risk for GC and peptic ulcer as well as malabsorption of vitamin B12, iron, magnesium, calcium and some drugs. A well designed clinical study is warranted to fully assess the performance of GastroPanel examination in detecting the gastric lesions which can lead to GC. The investigators aim to perform a clinical study in an adult population in United Kingdom in order to determine the diagnostic accuracy of the GastroPanel test in evaluating AG and other specific gastric conditions associated with an increased risk for GC. Methods: Two hundred and fifty patients (45 years and older, both genders) will be enrolled among the patients with dyspepsia referred for gastroscopy at Homerton University Hospital (London, United Kingdom). During the same visit, all patients are subjected to gastroscopy examination, with directed biopsies from the antrum and corpus, following the protocol of the operative link on gastritis assessment (OLGA) classification for chronic gastritis and Sydney Classification. Biopsies are examined at the Pathology laboratory of Homerton University Hospital and interpreted using the OLGA staging system as well as the Sydney system for classification of gastritis. Specific aims: The principal goal of this clinical trial is to establish the performance of the GastroPanel examination in detecting AG and other specific gastric conditions associated with an increased risk for GC. In particular, the investigators will evaluate AG in the antrum, AG in the corpus, AG in both antrum and corpus (=atrophic pangastritis), biopsy-confirmed dysplasia (intestinal metaplasia) of the gastric mucosa. For all these conditions, the investigators will calculate the diagnostic accuracy of the GastroPanel test.

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.

This study evaluates a range of endoscopic image enhancement techniques for assessing conditions involving the gastrointestinal tract. This study aims to determine: (i) the accuracy of different techniques to diagnose or grade severity of several gastrointestinal conditions (ii) if image-enhancement techniques could potentially replace investigations currently used in daily practice (e.g. biopsy) with a view to reduce costs and shorten the interval to initiate treatment

Helicobacter pylori is a major human pathogen that infects over half of the world population. Infection initiates a series of changes in the gastric mucosa, beginning with gastritis and leading in some patients to peptic ulcer disease, mucosa-associated lymphomas, and gastric adenocarcinoma. It is believed that host factors, in particular, the T cell-mediated immune responses may play an important role in the pathogenesis of diseases induced by H. pylori infection. Recent results revealed that there were higher IFN-γ secreting cells in gastric infiltrating T cells isolated from H. pylori infected patients than in uninfected patients, suggesting that the TH1 response and degree of IFN-γ production is associated with disease severity. Meanwhile, recent studies have shown that apoptosis of the gastric epithelium is increased during infection and this response is associated with an expansion of gastric T-helper type 1 (Th1) cells. In this project, we are trying to further investigate role of host T cell mediated immune response in pathogenesis of Helicobacter infection by characterization of the expression of chemokine receptors on gastric infiltrating lymphocytes. We are going to investigate the mechanisms involving in chemokine/chemokine receptor interaction in recruitment of gastric infiltrating lymphocytes and pathogenesis of gastric mucosa damage in Helicobacter infection. This study will be helpful for understanding the mechanisms of activation and recruitment of gastric-infiltrating lymphocytes during gastric inflammation.

The purpose of our study is to evaluate the metabolic contribution of the human microbiota to resting energy expenditure

This study seeks to correlate microbiome sequencing data with information provided by patients and their medical records regarding Crohn's disease.

Spleen Deficiency Syndrome(SDS)is a widely researched issue, but due to the limitations of the research methods, the scientific mechanism of SDS is biased and not comprehensive. SDS would be researched in this project deeply and systematically with modern life-scientific methods. Based on the previous work, the participants, with SDS, suffering from Qi deficiency syndrome--chronic superficial gastritis--chronic atrophic gastritis--gastric cancer would be included, and the corresponding research would be conducted at the molecular-cell-gastric tissue level, and at the same time, systematical biological database of SDS would be built by systematical biological methods, such as pioneered SPARS sequencing technology created in our research group, proteomics and metabonomics. Under the above work, the investigators would conduct data mining and molecular network analysis, and then verify the key functions. By analyzing the systematical biological features of syndrome and its relationships with constitution and disease, this study would provide a new basis for objective reality of syndrome, and also offer a crucial premise of revealing biological basis for syndrome correctly, which is of important theoretical and practical significance.

The pathogenetic mechanisms of chronic gastritis and gastric carcinoma are different. Whether metabonomics play a role in the development of chronic gastritis and gastric cancer is still a question. So the investigators want to clarify this question by this subject.

Gastritis defines any (histologically confirmed) inflammation of the gastric mucosa