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- W2079740461 abstract "OBJECTIVES Bloating in irritable bowel syndrome (IBS) may result from impaired intestinal gas transit and is reduced by the 5-HT4 agonist tegaserod. Abnormal serotonergic function underlies many IBS symptoms, but the role of 5-HT4 pathways in regulating gas dynamics under healthy conditions is unexplored. We hypothesized that 5-HT4 activation by tegaserod stimulates gas transit in healthy individuals. METHODS Sixteen normal volunteers underwent jejunal perfusion of gas mixtures (88% N2, 5.5% O2, 6.5% CO2) at 11.2 mL/min × 3 h under control conditions and 3 h after oral tegaserod 6 mg on separate days. Gas collected from an intrarectal catheter was quantified using a barostat. RESULTS Under control conditions, gas evacuation after a lag period (1,959 ± 428 s) was predominantly pulsatile with expulsion of 1,984 ± 90 mL. A mean of 29 ± 2 boluses with volumes of 72 ± 5 mL were expelled. In 10 subjects with physiologic degrees of gas retention in control studies (248 ± 73 mL), tegaserod increased expulsion from 1,768 ± 73 to 1,973 ± 37 mL and decreased retention to 43 ± 37 mL (p < 0.05). Total volumes expelled as boluses were greater after tegaserod (1,708 ± 73 vs 1,846 ± 59 mL, p < 0.05) from increased bolus numbers in four subjects and increased bolus volumes in seven. Nonpulsatile continuous flow tended to increase with tegaserod (43 ± 7 vs 126 ± 43 mL, p = 0.10). Tegaserod did not increase evacuation in individuals without physiologic gas retention. CONCLUSIONS The 5-HT4 agonist tegaserod promotes evacuation of jejunally perfused gas mixtures in healthy humans. These findings provide the foundation for future investigations into use of 5-HT4 agonists in conditions of pathologic gas retention." @default.
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- W2079740461 date "2006-08-01" @default.
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- W2079740461 title "Modulation of Intestinal Gas Dynamics in Healthy Human Volunteers by the 5-HT<sub>4</sub>Receptor Agonist Tegaserod" @default.
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- W2079740461 doi "https://doi.org/10.1111/j.1572-0241.2006.00708.x" @default.
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