Helicobacter pylori may participate in the development of inflammatory bowel disease by modulating the intestinal microbiota / 中华医学杂志(英文版)

Inflammatory bowel disease (IBD) is a non-specific inflammatory disease of the gastrointestinal (GI) tract that is generally accepted to be closely related to intestinal dysbiosis in the host. GI infections contribute a key role in the pathogenesis of IBD; however, although the results of recent clinical studies have revealed an inverse correlation between Helicobacter pylori (H. pylori) infection and IBD, the exact mechanism underlying the development of IBD remains unclear. H. pylori, as a star microorganism, has been a focus for decades, and recent preclinical and real-world studies have demonstrated that H. pylori not only affects the changes in the gastric microbiota and microenvironment but also influences the intestinal microbiota, indicating a potential correlation with IBD. Detailed analysis revealed that H. pylori infection increased the diversity of the intestinal microbiota, reduced the abundance of Bacteroidetes, augmented the abundance of Firmicutes, and produced short-chain fatty acid-producing bacteria such as Akkermansia. All these factors may decrease vulnerability to IBD. Further studies investigating the H. pylori-intestinal microbiota metabolite axis should be performed to understand the mechanism underlying the development of IBD.

Application value of sequential colorectal screening program in health check-ups / 中华消化杂志

Objective To explore the application value of the sequential colorectal cancer screening program in population completed health check-ups .Methods The healthy individuals were enrolled from November 2013 to July 2014 .Questionnaire survey of risk factors quantity assessment and fecal occult blood test (FOBT) were used for initial screening for colorectal cancer .According to the results of initial screening ,subjects were divided into high-risk group and low-risk group .The detection rates of polyps and cancers of two groups were compared .Chi-square test was performed for statistic alanalysis .Results A total of 525 individuals completed the colonoscopy .There were 187 individuals in high-risk group and 338 individuals in low-risk group .The results of colonscope examination showed that 70 cases of high-risk group were detected with polyps or colorectal cancer ,including 7 (10 .0% ) cases of colorectal cancers , 8(11 .4% ) cases of advanced adenoma ,30(42 .9% ) cases of non-advanced adenoma and 25(35 .7% ) cases of inflammatory polyps . In low-risk group , 63 individuals had polyps or colorectal cancer , including 5(7 .9% ) cases of advanced adenoma ,38(60 .3% ) cases of non-advanced adenoma and 20(31 .7% ) cases of inflammatory polyps .The differences of polyps and colorectal cancer detection rates between two groups were statistically significant (χ2=3 .905 and 10 .136 ,P=0 .048 and 0 .001) .Conclusion The sequential colorectal screening program including colorectal cancer risk factors quantity assessment questionnaire and FOBT seems to be a valuable tool in clinical practice .