Glucose-dependent insulinotropic polypeptide (GIP) is associated with lower LDL but unhealthy fat distribution, independent of insulin: The ADDITION-PRO study

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Cathrine Laustrup Møller, Dorte Vistisen, Kristine Færch, Nanna Borup Johansen, Daniel R. Witte, Anna Jonsson, Oluf Pedersen, Torben Hansen, Torsten Lauritzen, Marit E Jørgensen, Signe S Torekov, Jens Juul Holst

CONTEXT: Glucose-dependent insulinotropic polypeptide (GIP) may increase lipid clearance by stimulating lipid uptake. However, as GIP promotes release of insulin by the pancreas, and insulin is anti-lipolytic, the effect may be indirect.

OBJECTIVE: In this study, we examined the association between GIP and lipid metabolism in individuals with low to high risk of type 2 diabetes and assessed whether the associations were modified by or mediated through insulin.

DESIGN, SETTING AND PARTICIPANTS: Analyses were based on the Danish cross-sectional ADDITION-PRO study (n=1,405). Lipid metabolism was measured by fasting plasma lipids and obesity including abdominal fat distribution assessed by ultrasonography. GIP and insulin were measured during an oral glucose tolerance test (0, 30 and 120 minutes). Linear regression analysis was used to study the associations between GIP, plasma lipids and obesity measures.

RESULTS: A doubling in fasting GIP levels was associated with lower low-density lipoprotein in both men (-0.10 mmol/l (-0.18;-0.03)) and women (-0.14 mmol/l (-0.23;-0.04)) and with higher high-density lipoprotein in women (0.06 mmol/l (0.02;0.10)). In men, a doubling in stimulated GIP was associated with 0.13 cm less (0.01;0.25) subcutaneous fat but with more visceral abdominal fat (0.45 cm (0.12;0.78)) and higher waist-hip ratio (0.011 (0.004;0.019)).

CONCLUSIONS: Contrary to what was previously thought, GIP may be associated with improved LDL clearance but with an unhealthy fat distribution, independent of insulin. The effect of GIP on obesity measures was substantially different between men and women. The potential effect of GIP on visceral and subcutaneous adipose tissue physiology warrants further examination.

Original languageEnglish
JournalJournal of Clinical Endocrinology and Metabolism
Volume101
Issue number2
Pages (from-to)485– 493
Number of pages9
ISSN0021-972X
DOIs
Publication statusPublished - Feb 2016

ID: 150706149