Sirt3 in POMC neurons controls energy balance in a sex- and diet-dependent manner

Mar Quiñones, René Hernández-Bautista, Daniel Beiroa, Violeta Heras, Francisco L. Torres-Leal, Brian Y.H. Lam, Ana Senra, Johan Fernø, Alicia García Gómez-Valadés, Markus Schwaninger, Vincent Prevot, Giles Yeo, Marc Claret, Miguel López, Carlos Diéguez, Omar Al-Massadi, Ruben Nogueiras*

*Corresponding author for this work


Sirtuin 3 (SIRT3) is one of the seven mammalian sirtuin homologs of the yeast Sir2 gene that has emerged as an important player in the regulation of energy metabolism in peripheral tissues. However, its role in the hypothalamus has not been explored. Herein, we show that the genetic inhibition of SIRT3 in the hypothalamic arcuate nucleus (ARC) induced a negative energy balance and improvement of several metabolic parameters. These effects are specific for POMC neurons, because ablation of SIRT3 in POMC, but not in AgRP neurons, decreased body weight and adiposity, increased energy expenditure and brown adipose tissue (BAT) activity, and induced browning in white adipose tissue (WAT). Notably, the depletion of SIRT3 in POMC neurons caused these effects in male mice fed a chow diet but failed to affect energy balance in males fed a high fat diet and females under both type of diets. Overall, we provide the first evidence pointing for a key role of SIRT3 in POMC neurons in the regulation of energy balance.

Original languageEnglish
Article number101945
JournalRedox Biology
Pages (from-to)101945
Publication statusPublished - 05.2021

Research Areas and Centers

  • Academic Focus: Center for Brain, Behavior and Metabolism (CBBM)


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