Two-stage evolution of mammalian adipose tissue thermogenesis

Keipert, Susanne, Gaudry, Michael J., Kutschke, Maria, Keuper, Michaela, Dela Rosa, Margeoux A. S. ORCID:, Cheng, Yiming, Monroy Kuhn, José M., Laterveer, Rutger, Cotrim, Camila A., Giere, Peter, Perocchi, Fabiana, Feederle, Regina, Crichton, Paul G. ORCID:, Lutter, Dominik and Jastroch, Martin (2024) Two-stage evolution of mammalian adipose tissue thermogenesis. Science, 384 (6700). pp. 1111-1117. ISSN 0036-8075

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Brown adipose tissue (BAT) is a heater organ that expresses thermogenic uncoupling protein 1 (UCP1) to maintain high body temperatures during cold stress. BAT thermogenesis is considered an overarching mammalian trait, but its evolutionary origin is unknown. We show that adipose tissue of marsupials, which diverged from eutherian mammals ~150 million years ago, expresses a nonthermogenic UCP1 variant governed by a partial transcriptomic BAT signature similar to that found in eutherian beige adipose tissue. We found that the reconstructed UCP1 sequence of the common eutherian ancestor displayed typical thermogenic activity, whereas therian ancestor UCP1 is nonthermogenic. Thus, mammalian adipose tissue thermogenesis may have evolved in two distinct stages, with a prethermogenic stage in the common therian ancestor linking UCP1 expression to adipose tissue and thermal stress. We propose that in a second stage, UCP1 acquired its thermogenic function specifically in eutherians, such that the onset of mammalian BAT thermogenesis occurred only after the divergence from marsupials.

Item Type: Article
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
Faculty of Science > School of Biological Sciences
UEA Research Groups: Faculty of Medicine and Health Sciences > Research Groups > Cardiovascular and Metabolic Health
Faculty of Medicine and Health Sciences > Research Centres > Metabolic Health
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Depositing User: LivePure Connector
Date Deposited: 13 Jun 2024 15:30
Last Modified: 18 Jun 2024 13:30
DOI: 10.1126/science.adg1947


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