_Background_: Roentgen irradiation can affect normal cells, especially the rapidly growing ones such as the mucosal epithelial cells of the small intestine. The small intestine is the most radiosensitive gastrointestinal organ and patients receiving radiotherapy directed to the abdomen or pelvis may develop radiation enteritis. Although roentgen rays are widely used for both imaging and therapeutic purposes, our knowledge about ... إقراء المزيد

Melatonin is a free-radical scavenger and antioxidant. Roentgen irradiation of testis (animal model formed of albino rats) was associated with destruction and depletion of the germinal epithelial cells. In roentgen-irradiated, melatonin-pretreated animals, these changes were markedly ameliorated. Thus administration of melatonin before irradiation can protect testis from some of the destructive effects of roentgen irradiation. إقراء المزيد