| Summary: | Gastric emptying has been known to correlate the pyloric sphincter contractile function and distention-induced gastric relaxation (gastric accommodation). In the present study, the effects of l-tryptophan on the gastric emptying and accommodation were evaluated by breath test using [1-13C]acetic acid and Barostat study, respectively, in rats. l-Tryptophan significantly decreased Cmax and AUC120min and delayed Tmax, indicating the inhibition of gastric emptying. l-Tryptophan significantly enhanced the gastric accommodation. These findings show that l-tryptophan may inhibit the gastric emptying through the enhanced gastric accommodation. Therefore, l-tryptophan may be useful for the therapy of postprandial dyspepsia, especially for early satiety.
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