Increased adipose tissue aromatase activity improves insulin sensitivity and reduces adipose tissue inflammation in male mice
Journal article
Ohlsson, Claes, Hammarstedt, Ann, Vandenput, Liesbeth, Saarinen, Niina, Ryberg, Henrik, Windahl, Sara H., Farman, Helen H., Jansson, John-Olov, Movérare-Skrtic, Sofia, Smith, Ulf, Zhang, Fu-Ping, Poutanen, Matti, Hedjazifar, Shahram and Sjögren, Klara. (2017). Increased adipose tissue aromatase activity improves insulin sensitivity and reduces adipose tissue inflammation in male mice. American Journal of Physiology - Endocrinology and Metabolism. 313(4), pp. E450 - E462. https://doi.org/10.1152/ajpendo.00093.2017
Authors | Ohlsson, Claes, Hammarstedt, Ann, Vandenput, Liesbeth, Saarinen, Niina, Ryberg, Henrik, Windahl, Sara H., Farman, Helen H., Jansson, John-Olov, Movérare-Skrtic, Sofia, Smith, Ulf, Zhang, Fu-Ping, Poutanen, Matti, Hedjazifar, Shahram and Sjögren, Klara |
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Abstract | Females are, in general, more insulin sensitive than males. To investigate whether this is a direct effect of sex-steroids (SS) in white adipose tissue (WAT), we developed a male mouse model overexpressing the aromatase enzyme, converting testosterone (T) to estradiol (E2), specifically in WAT (Ap2-arom mice). Adipose tissue E2 levels were increased while circulating SS levels were unaffected in male Ap2-arom mice. Importantly, male Ap2-arom mice were more insulin sensitive compared with WT mice and exhibited increased serum adiponectin levels and upregulated expression of Glut4 and Irs1 in WAT. The expression of markers of macrophages and immune cell infiltration was markedly decreased in WAT of male Ap2-arom mice. The adipogenesis was enhanced in male Ap2-arom mice, supported by elevated Pparg expression in WAT and enhanced differentiation of preadipocyte into mature adipocytes. In summary, increased adipose tissue aromatase activity reduces adipose tissue inflammation and improves insulin sensitivity in male mice. We propose that estrogen increases insulin sensitivity via a local effect in WAT on adiponectin expression, adipose tissue inflammation, and adipogenesis. |
Keywords | aromatase; insulin sensitivity; inflammation; estrogen; adipose tissue |
Year | 2017 |
Journal | American Journal of Physiology - Endocrinology and Metabolism |
Journal citation | 313 (4), pp. E450 - E462 |
Publisher | American Physiological Society |
ISSN | 0193-1849 |
Digital Object Identifier (DOI) | https://doi.org/10.1152/ajpendo.00093.2017 |
Scopus EID | 2-s2.0-85030646264 |
Page range | E450 - E462 |
Research Group | Mary MacKillop Institute for Health Research |
Publisher's version | File Access Level Controlled |
Place of publication | United States of America |
https://acuresearchbank.acu.edu.au/item/886zw/increased-adipose-tissue-aromatase-activity-improves-insulin-sensitivity-and-reduces-adipose-tissue-inflammation-in-male-mice
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