Dataset Information

Metabolic syndrome and extensive adipose tissue inflammation in morbidly obese Gottingen minipigs.

ABSTRACT:

Objective

The worldwide prevalence of obesity has increased to 10% in men and 15% in women and is associated with severe comorbidities such as diabetes, cancer, and cardiovascular disease. Animal models of obesity are central to experimental studies of disease mechanisms and therapeutic strategies. Diet-induced obesity (DIO) models in rodents have provided important insights into the pathophysiology of obesity and, in most instances, are the first in line for exploratory pharmacology studies. To deepen the relevance towards translation to human patients, we established a corresponding DIO model in Göttingen minipigs (GM).

Methods

Young adult female ovariectomized GM were fed a high-fat/high-energy diet for a period of 70 weeks. The ration was calculated to meet the requirements and maintain body weight (BW) of lean adult minipigs (L-GM group) or increased stepwise to achieve an obese state (DIO-GM group). Body composition, blood parameters and intravenous glucose tolerance were determined at regular intervals. A pilot chronic treatment trial with a GLP1 receptor agonist was conducted in DIO-GM. At the end of the study, the animals were necropsied and a biobank of selected tissues was established.

Results

DIO-GM developed severe subcutaneous and visceral adiposity (body fat >50% of body mass vs. 22% in L-GM), increased plasma cholesterol, triglyceride, and free fatty acid levels, insulin resistance (HOMA-IR >5 vs. 2 in L-GM), impaired glucose tolerance and increased heart rate when resting and active. However, fasting glucose concentrations stayed within normal range throughout the study. Treatment with a long-acting GLP1 receptor agonist revealed substantial reduction of food intake and body weight within four weeks, with increased drug sensitivity relative to observations in other DIO animal models. Extensive adipose tissue inflammation and adipocyte necrosis was observed in visceral, but not subcutaneous, adipose tissue of DIO-GM.

Conclusions

The Munich DIO-GM model resembles hallmarks of the human metabolic syndrome with extensive adipose tissue inflammation and adipocyte necrosis reported for the first time. DIO-GM may be used for evaluating novel treatments of obesity and associated comorbidities. They may help to identify triggers and mechanisms of fat tissue inflammation and mechanisms preventing complete metabolic decompensation despite morbid obesity.

SUBMITTER: Renner S

PROVIDER: S-EPMC6157610 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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Publications

Metabolic syndrome and extensive adipose tissue inflammation in morbidly obese Göttingen minipigs.

Renner Simone S Blutke Andreas A Dobenecker Britta B Dhom Georg G Müller Timo D TD Finan Brian B Clemmensen Christoffer C Bernau Maren M Novak Istvan I Rathkolb Birgit B Senf Steffanie S Zöls Susanne S Roth Mirjam M Götz Anna A Hofmann Susanna M SM Hrabĕ de Angelis Martin M Wanke Rüdiger R Kienzle Ellen E Scholz Armin M AM DiMarchi Richard R Ritzmann Mathias M Tschöp Matthias H MH Wolf Eckhard E

Molecular metabolism 20180628

<h4>Objective</h4>The worldwide prevalence of obesity has increased to 10% in men and 15% in women and is associated with severe comorbidities such as diabetes, cancer, and cardiovascular disease. Animal models of obesity are central to experimental studies of disease mechanisms and therapeutic strategies. Diet-induced obesity (DIO) models in rodents have provided important insights into the pathophysiology of obesity and, in most instances, are the first in line for exploratory pharmacology stu ...[more]

PMID: 30017782

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