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Orphan nuclear receptor estrogen-related receptor alpha is essential for adaptive thermogenesis.

Authors: Villena, Josep A  Hock, M Benjamin  Chang, William Y  Barcas, Joanalyn E  Giguère, Vincent  Kralli, Anastasia 
Citation: Villena JA, etal., Proc Natl Acad Sci U S A. 2007 Jan 23;104(4):1418-23. doi: 10.1073/pnas.0607696104. Epub 2007 Jan 17.
Pubmed: (View Article at PubMed) PMID:17229846
DOI: Full-text: DOI:10.1073/pnas.0607696104

Survival of organisms requires the ability to adapt to changes in the environment. Adaptation of oxidative metabolism is essential for meeting increased energy demands in response to stressors, such as exposure to cold temperatures or increased physical activity. Adaptive changes in metabolism are often achieved at the level of gene expression, and nuclear receptors have prevalent roles in mediating such responses. Estrogen-related receptor alpha (ERRalpha) was the first orphan nuclear receptor to be identified, and yet its physiologic function remains unknown. Here, we show that mice lacking ERRalpha are unable to maintain body temperature when exposed to cold. Surprisingly, the inability to adapt to cold is not due to defects in the acute transcriptional induction of genes important for thermogenesis. Rather, we show that ERRalpha is needed for the high levels of mitochondrial biogenesis and oxidative capacity characteristic of brown adipose tissue (BAT), and thus for providing the energy necessary for thermogenesis. ERRalpha fulfills this role by acting directly at genes important for mitochondrial function, parallel to other factors controlling mitochondrial gene expression, such as NRF1 and NRF2/GABPA. Our findings demonstrate that ERRalpha is a key regulator of mitochondrial biogenesis and oxidative metabolism, and essential for adaptive thermogenesis.


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RGD Object Information
RGD ID: 13673809
Created: 2018-06-23
Species: All species
Last Modified: 2018-06-23
Status: ACTIVE


RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.