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- W2326885744 abstract "Irritable bowel syndrome (IBS) is the most common functional bowel disorder and has a strong predominance in women. Recent data suggest that the brain may play an important role in the pathophysiology of IBS in the brain-gut axis. It is strongly suspected that serotonin (5-HT), a neurotransmitter found in the brain and gut, may be related to the pathophysiology of IBS. It is reported that a 5-HT3 antagonist is effective only in female patients with diarrhea-predominant IBS.In the present study, 5-HT synthesis was measured using positron emission tomography, with alpha-[11C]methyl-L-tryptophan as the tracer, in patients with IBS. The aim of the present study was to compare 5-HT synthesis in the IBS patients with that in the controls, and to compare 5-HT synthesis between male and female IBS patients.Six male and six female nonconstipated IBS patients were scanned. Age-matched healthy volunteers were scanned as controls. Eighty minute dynamic scans were performed. Functional 5-HT synthesis images were analyzed using statistical parametric mapping.5-HT synthesis was greater only in the female IBS patients in the right medial temporal gyrus (multimodal sensory association cortex) compared with the female controls (P<0.001).The greater brain 5-HT synthesis in the female IBS patients than in the controls may be related to the pathological visceral pain processing of the IBS patients, a larger female predominance of the disorder, and the sex difference of the efficacy of the 5-HT3 antagonist in treatment." @default.
- W2326885744 created "2016-06-24" @default.
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- W2326885744 date "2003-01-01" @default.
- W2326885744 modified "2023-10-13" @default.
- W2326885744 title "Sex Differences of Brain Serotonin Synthesis in Patients with Irritable Bowel Syndrome Using α-[<sup>11</sup>C]methyl-L-tryptophan, Positron Emission Tomography and Statistical Parametric Mapping" @default.
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- W2326885744 doi "https://doi.org/10.1155/2003/572127" @default.
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