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Gastric Carcinogenesis

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The most common investigated factor that leads to the development of gastric cancer due to the infection of the human gastric mucosa is caused by Helicobacter pylori. There have been several studies suggesting that H. pylori fuels the initiation of gastric carcinogenesis by putting the host's genetic makeup in danger such as stalling mismatch repair and base excision repair mechanisms hence impairing efficient DNA repair. In this study, the authors were examining the opportunity H. pylori has in directly damaging DNA and activating a DNA-damage response in cells that were infected. In any event, the main question that the authors are asking is understanding the mechanism H. pylori performs in inducing host cellular DNA damage directly and ultimately seeking an explanation of its carcinogenic properties in causing gastric cancer. …show more content…
The H. pylori positive cells shows that the 53BP1 factor targets the sites of DSB in about one-third of the infected adenocarcinoma cells six hours after the infection. In addition, this happens as well in gamma-irradiated cells (10Gy group) one hour after irradiation. The red dots illustrate the quantity of 53BP1 active in the nuclear foci (DAPI) when repair is desirable. The positive control AGS cells treated with hydroxyurea (known to cause some DSBs) had the least amount of 53BP1 since there are no serious signs of DSBs. Additionally, the bar graph demonstrates that the irradiated cells fluoresce the most 53BP1, signifying that postirradiated cells cause the most

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