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  • Title: Epidermal growth factor delays gastric emptying and small intestinal transit in suckling rats.
    Author: Shinohara H, Williams C, Yakabe T, Koldovský O.
    Journal: Pediatr Res; 1996 Feb; 39(2):281-6. PubMed ID: 8825801.
    Abstract:
    Suckling (12-d-old) rats that were fasted for 15 h received epidermal growth factor (EGF) s.c. (0.5 and 1.0 microgram per rat, i.e. approximately 2 and 4 micrograms/100 g of body weight), together with motility markers 51Cr-EDTA or Poly R-478, and were killed 45 min later. Counts were measured separately in the stomach and the small intestine, which was divided into 12 segments. Administration of EGF delayed gastric emptying. In controls, the stomach contained 26.1 +/- 1.6% (mean +/- SEM); in EGF-treated rats the stomach contained 75.9 +/- 10.2% and 75.7 +/- 2.5% of the total 51Cr-EDTA counts given. EGF had the maximum effect (1.0 microgram) when given simultaneously with 51Cr-EDTA. Significant, but lower, effects of EGF were seen with the administration of EGF preceded by 10 min or followed by 10 and 20 min with the administration of 51Cr-EDTA (65.8 +/- 5.8%, 60.0 +/- 6.4%, and 54.1 +/- 4.2%, respectively). Small intestinal transit was also delayed. Administration of anti-EGF antiserum did not affect gastric emptying, but accelerated small intestinal transit as determined 30 min after administration of 51Cr-EDTA. These studies are the first to demonstrate the effect of EGF on gastrointestinal motility in vivo in suckling mammals.
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