Scientists have suspected for some time that stomach cancer is mainly caused by a bacteria called Helicobacter pylori. Bacteria does not transfer DNA into infected cells, so it is still not well understood as to how H. pylori triggers cancer. While certain viruses are known to cause cancer, such as human papilloma virus (HPV), by transferring oncogenes into the host cell DNA – the same cannot be said for how bacteria triggers cancer. Researchers Michael Sigal, Thomas Meyer, and their teams believe that bacteria’s role in triggering cancer is through stem cells in the glands that line the inside of the stomach. The stems cells identified were two different types, one cell was pushed into overdrive by exposure to bacteria, while the other is quieted.
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