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motility index measured by magnetic resonance enterography is associated with sex and mural thickness

World Journal of Gastroenterology 2020年第36期26卷 5484-5497页

作者： Sven Mansson Olle Ekberg Bodil Ohlsson Medical Radiation Physics Department of Translational MedicineLund UniversitySkåne University Hospital MalmöMalmö20502Sweden Department of Translational Medicine Diagnostic RadiologyLund UniversitySkåne University HospitalMalmö20502Sweden Department of Internal Medicine Skåne University HospitalLund UniversityMalmöS-20502Sweden

BACKGROUND Recently,a technique has been developed to use magnetic resonance enterography(MRE)for the evaluation of small bowel *** hypothesis was that assessment of the motility index(MI)should reflect differences in motility between clinical *** To aim of the present observational,cross-sectional study was to evaluate the use of the MI in daily clinical *** All consecutive patients aged 18-70 years who were referred for MRE at the Department of Radiology during a 2-year period were asked to *** volunteers were included as *** was prepared and conducted in accordance with clinical *** the day of examination,all the participants had to complete the visual analog scale for irritable bowel syndrome(IBS)and IBS-symptom severity *** of MI were calculated from dynamic MR *** was used to evaluate differences in MI between groups,classified as healthy,Crohn’s disease,ulcerative colitis,IBS,other assorted disorders and *** and linear regression were applied to the MI *** medical records were scrutinized for medical *** In all,224 examinations were included(inclusion prevalence 76.3%),with 22 controls and 202 *** was a significant difference in the MI of the jejunum(P=0.021)and terminal ileum(P=0.007)between the different *** MI was inversely associated with the mural thickness of the terminal ileum in men(Pmotility on MRI was accomplished by reduced MI of terminal ileum in men(P<0.001)and women(P=0.030).In women,diarrhea was inversely associated with the MI of the jejunum(P=0.029),and constipation was positively associated with the MI of the terminal ileum(P=0.039).CONCLUSION Although MIs differ across diseases,a lower MI of the terminal ileum is mainly associated with male sex and an increased mural thickness.S

关键词： Dysmotility Gastrointestinal symptoms Magnetic resonance enterography motility index Mural thickness Small bowel

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Effects of ghrelin on interdigestive contractions of the rat gastrointestinal tract

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World Journal of Gastroenterology 2008年第41期14卷 6299-6302页

作者： Hiroshi Taniguchi Hajime Ariga Kirk Ludwig Toku Takahashi Department of Surgery Medical College of Wisconsin and Zablocki VA Medical Center MilwaukeeWisconsin

Ghrelin causes interdigestive contractions of the stom- ach in rats. However, it remains unknown whether ghrelin causes interdigestive contractions in the small intestine. Four strain gauge transducers were implanted on the antrum, duodenum, proximal and distal jejunum. After an overnight fast, gastrointestinal （GI） contrac- tions were recorded in freely moving conscious rats. Spontaneous phase m-like contractions were observed at every 13-16 min in rat GI tract. The fasted motor patterns were replaced by the fed motor pattern imme- diately after food intake. Two minutes after finishing the spontaneous phase Ill-like contractions in the antrum, acyl ghrelin （0.8, 2.4 and 8.0 μg/kg per min） was con- tinuously infused for 30 min. Three-five minutes after the starting ghrelin infusion, augmented phase Ⅲ-like contractions were observed at the antrum, duodenum, and jejunum. Ghrelin infusion （0.8, 2.4 and 8.0μg/kg per min） significantly increased motility index of phase Ⅲ-like contractions at the antrum and jejunum in a dose dependent manner, compared to that of saline in- jection. Thus, it is likely that exogenously administered ghrelin causes phase Ⅲ-like contraction at the antrum, which migrates to the duodenum and jejunum. The possible role of 5-HT, in addition to ghrelin, in mediating intestinal migrating motor complex （MMC）, is discussed.

关键词： Phase Ⅲ-like contractions Strain gage transducers motility index

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