Beige fat appearance during lipoatrophy reveals trade-offs between metabolic homeostasis and female fertility
Anaya, E. S.; Dion, W.; Saha, P.; Cox, A. R.; de Groot, E.; Ahmed, A.; Felix, J. B.; Zhu, B.; Pangas, S. A.; Hartig, S. M.
Show abstract
White adipose tissue (WAT) meets the energetic demands required for estrous cycle regularity, ovulation, and reproductive success in women. Here, we report WAT loss and subsequent female-specific compensatory beige fat recruitment impact metabolic and reproductive outcomes in mice. Female mice that undergo progressive lipoatrophy ( fat-less) displayed disrupted estrous cycles, reduced ovarian reserve, and subfertility. These effects were attributable to an accumulation of thermogenic beige fat cells in residual subcutaneous WAT depots and greater energy expenditure. Conversely, high-fat diet lowered energy expenditure and rescued estrous cycle regularity among fat-less mice compared to littermate controls, despite profound insulin resistance and metabolic dysfunction. Together, these findings provide evidence of trade-offs between the maintenance of metabolic homeostasis and reproduction, where increased energy expenditure and beige fat cell emergence compensate for fat loss but occur at the expense of fecundity in female mice.
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