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• W1977581292 abstract "Abstract Background and Aims: In addition to its beneficial effects on small intestinal mucosal development and repair, insulin-like growth factor (IGF)-I has also been reported to improve neural function in toxic neuropathies. It has recently been recognized that enteric neural abnormalities contribute to the small intestinal dysmotility observed during and after abdominal radiotherapy for gynecological and pelvic malignancy. The aim of the present study was to evaluate the effects of IGF-I (5 mg/kg per day) and the more potent analog LR3IGF-I (5 mg/kg per day) on neurally mediated ileal dysmotility following irradiation. Methods: Intestinal motor activity was recorded from 6–8 cm segments of explanted rat ileum using a miniaturized manometric technique during arterial perfusion with oxygenated fluorocarbon solution. Studies were performed 4 days after treatment with 10 Gy abdominal irradiation. At the time of irradiation, all rats underwent implantation of an osmotic mini-pump that contained 100 mmol/L acetic acid vehicle (n = 8), IGF-I (n = 8) or LR3IGF-I (n = 7). For each experiment, the total number of pressure waves, high-amplitude long-duration (defined as > 20 mmHg, > 6 s; HALD) pressure waves and long bursts (> 20) of pressure waves were determined. Ileal segments from 12 non-irradiated rats were used as controls for manometric studies. In radiotherapy treated animals, the degree of mucosal damage was determined using a standardized histologic scoring system. Results: The HALD pressure waves were infrequent in non-irradiated rats but occurred in all irradiated animals. Insulin-like growth factor-I and LR3IGF-I had no effect on the frequency, amplitude or migration characteristics of HALD pressure waves compared with vehicle. Histologic damage was reduced in animals that received IGF-I and LR3IGF-I compared with vehicle-treated animals. Conclusions: In radiation enteritis, IGF-I has no effect on neurally mediated small intestinal dysmotility while improving mucosal histology. The disparity between these results suggests that parallel but separate pathologic processes underlie mucosal and motor abnormalities in radiation enteritis." @default.
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• W1977581292 date "2000-10-01" @default.
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• W1977581292 title "Divergence of mucosal and motor effects of insulin-like growth factor (IGF)-I and LR3IGF-I on rat isolated ileum following abdominal irradiation" @default.
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• W1977581292 doi "https://doi.org/10.1046/j.1440-1746.2000.02329.x" @default.
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