MRI assessment of the postprandial gastrointestinal motility and peptide response in healthy humans

Khalaf, Asseel and Hoad, Caroline and Menys, Alex and Nowak, Adam and Taylor, Stuart A. and Paparo, Stephen and Lingaya, Melanie and Falcone, Yirga and Singh, Gulzar and Spiller, Robin C. and Gowland, Penny A. and Marciani, Luca and Moran, Gordon W. (2017) MRI assessment of the postprandial gastrointestinal motility and peptide response in healthy humans. Neurogastroenterology and Motility . ISSN 1365-2982

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Abstract

Background: Feeding triggers inter-related gastrointestinal (GI) motor, peptide and appetite responses. These are rarely studied together due to methodological limitations. Recent MRI advances allow pan-intestinal, non-invasive assessment of motility in the undisturbed gut.

This study aimed to develop a methodology to assess pan-intestinal motility and transit in a single session using MRI and compare imaging findings to GI peptide responses to a test meal and symptoms in a healthy volunteer cohort.

Methods: Fifteen healthy volunteers (29.3±2.7years and BMI 20.1±1.2Kg/m2) underwent baseline and postprandial MRI scans, symptom questionnaires and blood sampling (for subsequent GI peptide analysis, Glucagon-like peptide-1 (GLP-1), Polypeptide YY (PYY), Cholecystokinin (CCK)) at intervals for 270min following a 400g soup meal (204kcal, Heinz, UK). Gastric volume, gall bladder volume, small bowel water content, small bowel motility and whole gut transit were measured from the MRI scans.

Key Results: (mean±SEM) Small bowel motility index increased from fasting 39±3 arbitrary units (a.u.) to a maximum of 87±7a.u. immediately after feeding. PYY increased from fasting 98±10pg/ml to 149±14pg/ml at 30min and GLP-1 from fasting 15±3µg/ml to 22±4µg/ml. CCK increased from fasting 0.40±0.06pmol/ml to 0.94±0.1pmol/ml. Gastric volumes declined with a T1/2 of 46±5min and the gallbladder contracted from a fasting volume of 19±2ml to 12±2ml. Small bowel water content increased from 39±2ml to 51±2ml postprandial. Fullness VAS score increased from 9±5mm to 41±6mm at 30min postprandial.

Conclusions and Inferences: The test meal challenge was effective in inducing a change in MRI motility end-points which will improve understanding of the pathophysiological postprandial GI response.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: Khalaf A, Hoad CL, Menys A, et al. MRI assessment of the postprandial gastrointestinal motility and peptide response in healthy humans. Neurogastroenterol Motil. 2017;e13182. https://doi.org/10.1111/nmo.13182 which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1111/nmo.13182/full This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Keywords: Gastrointestinal motility; Gut peptides; MRI; Satiety; Bowel
Schools/Departments: University of Nottingham, UK > Faculty of Medicine and Health Sciences > School of Medicine > Nottingham Digestive Diseases Centre
University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.1111/nmo.13182
Depositing User: Marciani, Dr Luca
Date Deposited: 18 Jul 2017 13:17
Last Modified: 12 Oct 2017 23:37
URI: http://eprints.nottingham.ac.uk/id/eprint/44215

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