Yongquan Shi

This study tests whether ursodeoxycholic acid, a drug used for bile duct problems, can reverse gastric intestinal metaplasia—a condition that raises stomach cancer risk. About 196 adults without H. pylori infection will take the drug or a placebo daily for 6 months. Doctors will …

This study tests whether adding a probiotic (Saccharomyces boulardii) to a standard 4-drug antibiotic treatment can better clear H. pylori infection in people whose previous treatment failed. About 1,248 adults who still have the infection after prior therapy will receive either …

This study compares upadacitinib, a newer oral medication, to standard corticosteroid injections for treating sudden, severe flare-ups of ulcerative colitis. About 46 adults with acute severe UC will receive either upadacitinib pills or steroid injections for 3 months, with regul…

This study tests whether a combination of thalidomide and glutamine can reduce bleeding caused by radiation damage to the intestines. About 150 adults with chronic radiation enteritis will be randomly assigned to receive the treatment. The main goal is to see if the treatment cut…

This study looks at whether exposure to tiny plastic particles (microplastics) is linked to the development of stomach cancer and its early stages. Researchers will ask 450 adults with different stomach conditions to fill out a questionnaire about their exposure to microplastics.…