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Testosterone reduces body fat in male mice by stimulation of physical activity via extrahypothalamic ER alpha signaling

Na Ri Kim, Karel David, Katrien Corbeels, Rougin Khalil, Leen Antonio, Dieter Schollaert, Ludo Deboel, Claes Ohlsson, Jan-Ake Gustafsson, Roman Vangoitsenhoven, et al.
(2021) ENDOCRINOLOGY. 162(6).
Author
Organization
Abstract
Testosterone (T) reduces male fat mass, but the underlying mechanisms remain elusive, limiting its clinical relevance in hypogonadism-associated obesity. Here, we subjected chemically castrated high-fat diet-induced adult obese male mice to supplementation with T or the nonaromatizable androgen dihydrotestosterone (DHT) for 20 weeks. Both hormones increased lean mass, thereby indirectly increasing oxygen consumption and energy expenditure. In addition,T but not DHT decreased fat mass and increased ambulatory activity, indicating a role for aromatization into estrogens. Investigation of the pattern of aromatase expression in various murine tissues revealed the absence of Cyp99a1 expression in adipose tissue while high levels were observed in brain and gonads. In obese hypogonadal male mice with extrahypothalamic neuronal estrogen receptor alpha deletion (N-ER alpha KO), T still increased lean mass but was unable to decrease fat mass. The stimulatory effect of T on ambulatory activity was also abolished in N-ER alpha KO males. In conclusion, our work demonstrates that the fat-burning action ofT is dependent on aromatization into estrogens and is at least partially mediated by the stimulation of physical activity via extrahypothalamic ER alpha signaling. In contrast, the increase in lean mass upon T supplementation is mediated through the androgen receptor and indirectly leads to an increase in energy expenditure, which might also contribute to the fat-burning effects of T.
Keywords
sex steroids, testosterone, estradiol, hypogonadism, fat mass, physical, activity

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MLA
Kim, Na Ri, et al. “Testosterone Reduces Body Fat in Male Mice by Stimulation of Physical Activity via Extrahypothalamic ER Alpha Signaling.” ENDOCRINOLOGY, vol. 162, no. 6, 2021, doi:10.1210/endocr/bqab045.
APA
Kim, N. R., David, K., Corbeels, K., Khalil, R., Antonio, L., Schollaert, D., … Dubois, V. (2021). Testosterone reduces body fat in male mice by stimulation of physical activity via extrahypothalamic ER alpha signaling. ENDOCRINOLOGY, 162(6). https://doi.org/10.1210/endocr/bqab045
Chicago author-date
Kim, Na Ri, Karel David, Katrien Corbeels, Rougin Khalil, Leen Antonio, Dieter Schollaert, Ludo Deboel, et al. 2021. “Testosterone Reduces Body Fat in Male Mice by Stimulation of Physical Activity via Extrahypothalamic ER Alpha Signaling.” ENDOCRINOLOGY 162 (6). https://doi.org/10.1210/endocr/bqab045.
Chicago author-date (all authors)
Kim, Na Ri, Karel David, Katrien Corbeels, Rougin Khalil, Leen Antonio, Dieter Schollaert, Ludo Deboel, Claes Ohlsson, Jan-Ake Gustafsson, Roman Vangoitsenhoven, Bart Van Der Schueren, Brigitte Decallonne, Frank Claessens, Dirk Vanderschueren, and Vanessa Dubois. 2021. “Testosterone Reduces Body Fat in Male Mice by Stimulation of Physical Activity via Extrahypothalamic ER Alpha Signaling.” ENDOCRINOLOGY 162 (6). doi:10.1210/endocr/bqab045.
Vancouver
1.
Kim NR, David K, Corbeels K, Khalil R, Antonio L, Schollaert D, et al. Testosterone reduces body fat in male mice by stimulation of physical activity via extrahypothalamic ER alpha signaling. ENDOCRINOLOGY. 2021;162(6).
IEEE
[1]
N. R. Kim et al., “Testosterone reduces body fat in male mice by stimulation of physical activity via extrahypothalamic ER alpha signaling,” ENDOCRINOLOGY, vol. 162, no. 6, 2021.
@article{8737850,
  abstract     = {{Testosterone (T) reduces male fat mass, but the underlying mechanisms remain elusive, limiting its clinical relevance in hypogonadism-associated obesity. Here, we subjected chemically castrated high-fat diet-induced adult obese male mice to supplementation with T or the nonaromatizable androgen dihydrotestosterone (DHT) for 20 weeks. Both hormones increased lean mass, thereby indirectly increasing oxygen consumption and energy expenditure. In addition,T but not DHT decreased fat mass and increased ambulatory activity, indicating a role for aromatization into estrogens. Investigation of the pattern of aromatase expression in various murine tissues revealed the absence of Cyp99a1 expression in adipose tissue while high levels were observed in brain and gonads. In obese hypogonadal male mice with extrahypothalamic neuronal estrogen receptor alpha deletion (N-ER alpha KO), T still increased lean mass but was unable to decrease fat mass. The stimulatory effect of T on ambulatory activity was also abolished in N-ER alpha KO males. In conclusion, our work demonstrates that the fat-burning action ofT is dependent on aromatization into estrogens and is at least partially mediated by the stimulation of physical activity via extrahypothalamic ER alpha signaling. In contrast, the increase in lean mass upon T supplementation is mediated through the androgen receptor and indirectly leads to an increase in energy expenditure, which might also contribute to the fat-burning effects of T.}},
  articleno    = {{bqab045}},
  author       = {{Kim, Na Ri and David, Karel and Corbeels, Katrien and Khalil, Rougin and Antonio, Leen and Schollaert, Dieter and Deboel, Ludo and Ohlsson, Claes and Gustafsson, Jan-Ake and Vangoitsenhoven, Roman and Van Der Schueren, Bart and Decallonne, Brigitte and Claessens, Frank and Vanderschueren, Dirk and Dubois, Vanessa}},
  issn         = {{0013-7227}},
  journal      = {{ENDOCRINOLOGY}},
  keywords     = {{sex steroids,testosterone,estradiol,hypogonadism,fat mass,physical,activity}},
  language     = {{eng}},
  number       = {{6}},
  pages        = {{12}},
  title        = {{Testosterone reduces body fat in male mice by stimulation of physical activity via extrahypothalamic ER alpha signaling}},
  url          = {{http://doi.org/10.1210/endocr/bqab045}},
  volume       = {{162}},
  year         = {{2021}},
}
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