Refereed journal article or data article (A1)
Effects of meal and incretins in the regulation of splanchnic blood flow
List of Authors: Koffert J, Honka H, Teuho J, Kauhanen S, Hurme S, Parkkola R, Oikonen V, Mari A, Lindqvist A, Wierup N, Groop L, Nuutila P
Publisher: BIOSCIENTIFICA LTD
Publication year: 2017
Journal: Endocrine Connections
Journal name in source: ENDOCRINE CONNECTIONS
Journal acronym: ENDOCR CONNECT
Volume number: 6
Issue number: 3
Start page: 179
End page: 187
Number of pages: 9
ISSN: 2049-3614
DOI: http://dx.doi.org/10.1530/EC-17-0015
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/26397278
Objective: Meal ingestion is followed by a redistribution of blood flow (BF) within the splanchnic region contributing to nutrient absorption, insulin secretion and glucose disposal, but factors regulating this phenomenon in humans are poorly known. The aim of the present study was to evaluate the organ-specific changes in BF during a mixed-meal and incretin infusions.Design: A non-randomized intervention study of 10 healthy adults to study splanchnic BF regulation was performed.Methods: Effects of glucose-dependent insulinotrophic polypeptide (GIP) and glucagon-like peptide 1 (GLP-1) infusions and mixed-meal were tested in 10 healthy, glucose tolerant subjects using PET-MRI multimodal imaging technology. Intestinal and pancreatic BF and blood volume (BV) were measured with O-15-water and O-15-carbon monoxide, respectively.Results: Ingestion of a mixed-meal led to an increase in pancreatic and jejunal BF, whereas duodenal BF was unchanged. Infusion of GIP and GLP-1 reduced BF in the pancreas. However, GIP infusion doubled blood flow in the jejunum with no effect of GLP-1.Conclusion: Together, our data suggest that meal ingestion leads to increases in pancreatic BF accompanied by a GIP-mediated increase in jejunal but not duodenal blood flow.
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