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Differential Impact of Glucose Administered Intravenously and Orally on Circulating miR-375 Levels in Human Subjects
Stockholm University, Faculty of Science, Department of Molecular Biosciences, The Wenner-Gren Institute. Stockholm University, Science for Life Laboratory (SciLifeLab).
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Number of Authors: 15
2017 (English)In: Journal of Clinical Endocrinology and Metabolism, ISSN 0021-972X, E-ISSN 1945-7197, Vol. 102, no 10, 3749-3755 p.Article in journal (Refereed) Published
Abstract [en]

Background

To date, numerous nucleic acid species have been detected in the systemic circulation including microRNAs (miRNAs); however, their functional role in this compartment remains unclear.

Objective

The aim of this study was to determine whether systemic levels of miRNAs abundant in blood, including the neuroendocrine tissue-enriched miR-375, are altered in response to a glucose challenge.

Design

Twelve healthy males were recruited for an acute crossover study that consisted of two tests each following an 8-hour fasting period. An oral glucose tolerance test (OGTT) was performed, and blood samples were collected over a 3-hour period. Following a period of at least 1 week, the same participants were administered an isoglycemic intravenous glucose infusion (IIGI) with the same blood-collection protocol.

Results

The glucose response curve following the IIGI mimicked that obtained after the OGTT, but as expected, systemic insulin levels were lower during the IIGI compared with the OGTT (P < 0.05). miR-375 levels in circulation were increased only in response to an OGTT and not during an IIGI. In addition, the response to the OGTT also coincided with the transient increase of circulating glucagon-like peptide (GLP)-1, GLP-2, and glucose-dependent insulinotropic polypeptide.

Conclusions

The present findings show levels of miR-375 increase following administration of an OGTT and, in light of its enrichment in cells of the gut, suggest that the gastrointestinal tract may play an important role in the abundance and function of this miRNA in the blood.

Place, publisher, year, edition, pages
2017. Vol. 102, no 10, 3749-3755 p.
Keyword [en]
Diabetes, Pancreatic and Gastrointestinal Hormones
National Category
Endocrinology and Diabetes
Identifiers
URN: urn:nbn:se:su:diva-148866DOI: 10.1210/jc.2017-01365ISI: 000412450400015PubMedID: 28973164OAI: oai:DiVA.org:su-148866DiVA: diva2:1159261
Available from: 2017-11-22 Created: 2017-11-22 Last updated: 2017-11-22Bibliographically approved

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Tarbier, MarcelFriedländer, Marc R.
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