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JNK1 ablation in mice confers long-term metabolic protection from diet-induced obesity at the cost of moderate skin oxidative damage.

Artikel i vetenskaplig tidskrift
Författare Barbara Becattini
Fabio Zani
Ludovic Breasson
D'Agostino Vito
Claudia Sardi
Min-Kyung Choo
Alessandro Provenzani
Jin-Mo Park
Giovanni Solinas
Publicerad i The FASEB Journal
Volym 30
Nummer/häfte 9
Sidor 3124-3132
ISSN 0892-6638
Publiceringsår 2016
Publicerad vid
Sidor 3124-3132
Språk en
Ämnesord Obesity, Oxidative stress, Inflammation, Insulin Resistance, Skin
Ämneskategorier Hälsovetenskaper

Sammanfattning

Obesity and insulin resistance are associated with oxidative stress, which may be implicated in the progression of obesity-related diseases. The kinase JNK1 has emerged as a promising drug target for the treatment of obesity and type 2 diabetes. JNK1 is also a key mediator of the oxidative stress response, which can promote cell death or survival, depending on the magnitude and context of its activation. In this article, we describe a study in which the long-term effects of JNK1 inactivation on glucose homeostasis and oxidative stress in obese mice were investigated for the first time. Mice lacking JNK1 (JNK1−/−) were fed an obesogenic high-fat diet (HFD) for a long period. JNK1−/− mice fed an HFD for the long term had reduced expression of antioxidant genes in their skin, more skin oxidative damage, and increased epidermal thickness and inflammation compared with the effects in control wild-type mice. However, we also observed that the protection from obesity, adipose tissue inflammation, steatosis, and insulin resistance, conferred by JNK1 ablation, was sustained over a long period and was paralleled by decreased oxidative damage in fat and liver. We conclude that compounds targeting JNK1 activity in brain and adipose tissue, which do not accumulate in the skin, may be safer and most effective.

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