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- W2075989481 abstract "Background: A combination of epidermal growth factor (EGF) and human growth hormone (hGH) after massive enterectomy induces a 400% increase in arginine transport in the remnant distal small intestine. The kinetic mechanism (s) responsible for enhanced arginine transport under these conditions is unknown. Methods: New Zealand White rabbits underwent 70% midjejunoileal resection. After a 1-week recovery period, animals received hGH (0.2 mg/kg/d IM), EGF (1.5 μg/kg/h SC), hGH + EGF, or vehicle (equal volume) for 7 days. Transport of tritiated arginine into brush border membrane vesicles prepared from distal remnant small intestinal mucosa was quantified in the presence and absence of a sodium gradient over a range of arginine concentrations (25 to 5000 μmol/L). Results: Eadie-Hofstee transformation of the kinetic data demonstrates two sodium-dependent arginine transport systems, comprising a high-capacity, low-affinity system and a low-capacity, high-affinity system. A combination of EGF and hGH significantly upregulates both the high-capacity (685%) and low-capacity (350%) maximum transport velocity (Vmax). Additionally, EGF alone significantly upregulates V max by 200% in the low-capacity system. There were no significant changes in transport affinity (Km) in either system. Conclusions: There are two quiescent sodium-dependent arginine transport systems in the distal small intestine. A combination of EGF and hGH after massive enterectomy increase arginine transport by V max upregulation in both the high-capacity/low-affinity and lowcapacity/high-affinity systems. (Journal of Parenteral and Enteral Nutrition 22:326–330, 1998)" @default.
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- W2075989481 date "1998-09-01" @default.
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- W2075989481 title "Epidermal Growth Factor and Human Growth Hormone Induce Two Sodium-Dependent Arginine Transport Systems After Massive Enterectomy" @default.
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- W2075989481 doi "https://doi.org/10.1177/0148607198022005326" @default.
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