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lüll Review article: new insights into the pathogenesis of radiation-induced intestinal dysfunction MacNaughton WKAliment Pharmacol Ther 2000[May]; 14 (5): 523-8Exposure of the abdomino-pelvic region to ionizing radiation, such as that received during radiotherapy, is associated with the development of a number of untoward symptoms which may limit the course of therapy or which may involve serious chronic intestinal disease. While the mucosal dysfunction surrounding acute radiation enteritis is generally ascribed to the effects of ionizing radiation on the cell cycle of epithelial stem cells of the intestinal crypts and subsequent epithelial loss, recent evidence suggests that other, earlier events also play a role. The severity of these early events may determine the incidence and severity of chronic enteritis. The mechanism for this is unclear, but may relate to radiation-induced compromise of host defence responses to luminal pathogens or antigens. This review will address the current state of knowledge of the pathogenesis of radiation-induced intestinal dysfunction, focusing on events which occur in the mucosa, and will discuss what the future may hold with respect to the treatment of radiation-associated diseases of the intestinal tract.|Cell Cycle[MESH]|Chronic Disease[MESH]|Enteritis/*etiology[MESH]|Epithelial Cells/cytology/radiation effects[MESH]|Humans[MESH]|Intestinal Mucosa/pathology/*radiation effects[MESH]|Radiation Injuries/*etiology[MESH]|Radiotherapy/*adverse effects[MESH] |