Helicobacter pylori research reveals mechanisms of gastric cell alteration

Research into Helicobacter pylori continues to reveal how the bacterium impacts human health, from its historical discovery to its complex cellular mechanisms. Originally, gastric and duodenal ulcers were attributed to stress and diet. However, the work of Barry Marshall and Robin Warren proved that H. pylori is a primary cause of chronic gastritis and ulcers, a discovery that earned them the Nobel Prize in 2005.

Recent studies by researchers at Charité and the Max Delbrück Center have identified how the bacterium alters stomach cells. Beyond causing chronic inflammation, H. pylori can trigger a process that reverts cells to an embryonic-like state. This occurs through the disruption of BMP signaling and the involvement of the YAP protein, which regulates tissue growth and repair. When the body's natural safety mechanisms fail, immune cells produce the pro-inflammatory molecule IL-1β, contributing to the increased risk of stomach cancer.