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  • Title: Effect of daikenchuto (TU-100) on gastrointestinal and colonic transit in humans.
    Author: Manabe N, Camilleri M, Rao A, Wong BS, Burton D, Busciglio I, Zinsmeister AR, Haruma K.
    Journal: Am J Physiol Gastrointest Liver Physiol; 2010 Jun; 298(6):G970-5. PubMed ID: 20378829.
    Abstract:
    Daikenchuto (TU-100) is a traditional Japanese (Kampo) medicine used to treat postoperative ileus. TU-100 dose dependently increases gastrointestinal (GI) motility by modulating cholinergic and serotonergic mechanisms in animal studies. The aim of this study was to evaluate the effects of orally administered TU-100 on GI and colonic transit and bowel function in healthy humans. In a randomized, parallel-group, double-blind, placebo-controlled, dose-response study, 60 healthy subjects were randomly assigned to placebo or TU-100 2.5 g or 5 g tid ingested immediately before meals for 5 consecutive days. We measured GI and colonic transit by validated scintigraphy and stool frequency and consistency by daily diaries of bowel function. There were overall treatment effects on colonic filling at 6 h without any significant differences between each dose of TU-100 and placebo. There tended to be overall treatment effects on ascending colon (AC) emptying half-time; the TU-100 (7.5 g/day) treatment significantly accelerated AC emptying compared with placebo. There were numerically higher values of GC24 (which reflect overall colonic transit) with both doses of TU-100, but these changes were not statistically significant. There were no significant overall treatment effects on gastric emptying or stool frequency and consistency. One subject, who received 7.5 g/day of TU-100, had elevated creatine phosphokinase following the study. TU-100 (7.5 g/day) significantly accelerated AC emptying. Further randomized controlled trials in patients with functional constipation or irritable bowel syndrome with constipation are warranted to evaluate the clinical efficacy of TU-100 in these disorders.
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