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Oral epidermal growth factor is trophic for the stomach in the neonatal rat
1Faculty of Medicine, University of Newcastle, Australia.
Insights
Neonatal rat pups show rapid stomach growth within 24 hours of birth. Supplementing formula with epidermal growth factor (EGF) further increased stomach size, suggesting EGF
Area of Science:
- Neonatal physiology
- Gastrointestinal development
- Endocrinology
Background:
- Rapid growth is characteristic of the neonatal period.
- The gastrointestinal tract undergoes significant development post-birth.
- Hormonal and growth factor signaling plays a crucial role in neonatal development.
Purpose of the Study:
- To investigate the growth rate of the stomach in naturally suckled rat pups.
- To determine the effect of epidermal growth factor (EGF) on neonatal stomach growth.
Main Methods:
- Measurement of absolute stomach weight in rat pups.
- Calculation of stomach weight relative to body weight.
- Comparison of stomach size between control and EGF-supplemented formula-fed pups.
Main Results:
- Rat pup stomachs exhibited rapid growth in the first 24 hours post-delivery.
- Both absolute and relative stomach weights significantly increased (p < 0.001).
- Pups fed EGF-containing formula had significantly larger stomachs than controls (p < 0.05).
Conclusions:
- Milk-borne epidermal growth factor (EGF) plays a role in regulating neonatal gut growth.
- EGF may be a key mediator of early gastrointestinal development in suckled pups.
- Findings support the importance of milk composition in supporting neonatal digestive system maturation.
Abstract:
The stomach of the naturally suckled rat pup was shown to grow rapidly during the first 24 h following delivery. Both absolute weight (p less than 0.001) and weight in proportion to body weight (p less than 0.001) increased. The stomachs of pups fed formula containing epidermal growth factor (EGF) were larger than those of their control littermates (p less than 0.05). These data support a role for milk EGF in the regulation of neonatal gut growth.