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Erschienen in: Diabetologia 11/2015

01.11.2015 | Article

Elevated nocturnal NEFA are an early signal for hyperinsulinaemic compensation during diet-induced insulin resistance in dogs

verfasst von: Josiane L. Broussard, Cathryn M. Kolka, Ana V. B. Castro, Isaac Asare Bediako, Rebecca L. Paszkiewicz, Edward W. Szczepaniak, Lidia S. Szczepaniak, Kristen L. Knutson, Stella P. Kim, Richard N. Bergman

Erschienen in: Diabetologia | Ausgabe 11/2015

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Abstract

Aims/hypothesis

A normal consequence of increased energy intake and insulin resistance is compensatory hyperinsulinaemia through increased insulin secretion and/or reduced insulin clearance. Failure of compensatory mechanisms plays a central role in the pathogenesis of type 2 diabetes mellitus; consequently, it is critical to identify in vivo signal(s) involved in hyperinsulinaemic compensation. We have previously reported that high-fat feeding leads to an increase in nocturnal NEFA concentration. We therefore designed this study to test the hypothesis that elevated nocturnal NEFA are an early signal for hyperinsulinaemic compensation for insulin resistance.

Methods

Blood sampling was conducted in male dogs to determine 24 h profiles of NEFA at baseline and during high-fat feeding with and without acute nocturnal NEFA suppression using a partial A1 adenosine receptor agonist.

Results

High-fat feeding increased nocturnal NEFA and reduced insulin sensitivity, effects countered by an increase in acute insulin response to glucose (AIRg). Pharmacological NEFA inhibition after 8 weeks of high-fat feeding lowered NEFA to baseline levels and reduced AIRg with no effect on insulin sensitivity. A significant relationship emerged between nocturnal NEFA levels and AIRg. This relationship indicates that the hyperinsulinaemic compensation induced in response to high-fat feeding was prevented when the nocturnal NEFA pattern was returned to baseline.

Conclusions/interpretation

Elevated nocturnal NEFA are an important signal for hyperinsulinaemic compensation during diet-induced insulin resistance.
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Metadaten
Titel
Elevated nocturnal NEFA are an early signal for hyperinsulinaemic compensation during diet-induced insulin resistance in dogs
verfasst von
Josiane L. Broussard
Cathryn M. Kolka
Ana V. B. Castro
Isaac Asare Bediako
Rebecca L. Paszkiewicz
Edward W. Szczepaniak
Lidia S. Szczepaniak
Kristen L. Knutson
Stella P. Kim
Richard N. Bergman
Publikationsdatum
01.11.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Diabetologia / Ausgabe 11/2015
Print ISSN: 0012-186X
Elektronische ISSN: 1432-0428
DOI
https://doi.org/10.1007/s00125-015-3721-6

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