Abstract
Jejunal perfusion studies were performed in 12 healthy volunteers to study the effects of 14 and 56 mM glucose on fluid secretion induced by 5 mM glycodeoxycholate or 7 mM oleate. Glucose enhanced water absorption under control conditions and reduced water secretion induced by glycodeoxycholate or oleate (P<0.01). As has been observed previously, glycodeoxycholate and oleate inhibited glucose absorption (P<0.001) and significant linear relationships existed between net water movement and glucose absorption. Glycodeoxycholate also reduced the absorption of 14 mM arabinose (P<0.05) and oleate reduced the absorption of 56 mM mannitol (P<0.05). Reduced solute absorption in the presence of glycodeoxycholate and oleate, therefore, cannot be attributed to an effect on active transport alone. The relationships between sodium transport and water absorption varied with the glucose concentration in the perfusion solutions. Similarly, the relationships between glucose absorption and sodium absorption varied with glucose concentration. The data suggest that a significant amount of glucose can be absorbed without concomitant absorption of sodium. The data indicate that glucose absorption can stimulate water absorption directly without the mediation of sodium and that water movement follows glucose at a rate which maintains isotonicity.
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Brown, B.D., Ammon, H.V. Effect of glucose on jejunal water and solute absorption in the presence of glycodeoxycholate and oleate in man. Digest Dis Sci 26, 710–717 (1981). https://doi.org/10.1007/BF01316860
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DOI: https://doi.org/10.1007/BF01316860