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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

Sensitization of diabetic and obese mice to insulin by retinoid X receptor agonists

Article Abstract:

Retinoid X receptor (RXR)-selective ligands activate dimers formed between RXR and the peroxisome proliferator-activated receptor gamma (PPARgamma) or the orphan receptor LXR. Since PPARgamma is a target for nondiabetic agents, it was investigated whether these ligands affected insulin and glucose signalling. Findings showed that they not only sensitized insulin action in an animal model of non-insulin-dependent diabetes mellitus and obesity, thus decreasing hyperglycaemia, hypertriglyceridaemia and hyperinsulinaemia, but that the effect was enhanced by PPARgamma agonists. These indicate that RXR ligands have potential as pharmacological agents for diabetes treatment.

Author: Heyman, Richard A., Mondon, Carl E., Boehm, Marcus F., Mukherjee, Ranjan, Nadzan, Alex M., Davies, Peter J.A., Crombie, Diane L., Bischoff, Eric D., Cesario, Rosemary M., Jow, Lily, Hamann, Lawrence G., Paterniti, James R., Jr.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
Research, Analysis, Hypoglycemic agents, Ligands, Ligands (Chemistry)

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Protection from obesity-induced insulin resistance in mice lacking TNF-alpha function

Article Abstract:

Obesity is the main risk factor linked to non-insulin-dependent diabetes mellitus. Tumour necrosis factor-alpha (TNF-alpha), which is over-expressed in the adipose tissue of mice and humans, is thought to be associated with insulin resistance. A study of obese mice with mutated TNF-alpha genes confirms that it is an important mediator of insulin resistance. The study reveals that the muscle and fat of mice without circulating TNF-alpha show large increases in insulin-sensitivity, regardless of whether the obesity is dietary or genetic.

Author: Uysal, K. Teoman, Hotamisligil, Gokhan S., Wiesbrock, Sarah M., Marino, Michael W.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
Causes of, Genetic aspects, Type 2 diabetes, Tumor necrosis factor

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Subjects list: Insulin resistance
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