DOI: 10.1126/science.adz4797 ISSN: 0036-8075

Mitochondrial carrier SLC25A34 links clock, diet, and temperature control of adipocyte lipid cycling

Iuliia Karavaeva, Astrid Linde Basse, Samuel A. J. Trammell, Mohammed Faiz Hussain, Lasse Kruse Markussen, Jesper F. Havelund, Marie Sophie Isidor, Adam Chatoff, Andrea Andress Huacachino, Hannah J. Richter, Meghna Birla, Sabina Chubanava, Yann Deleye, Rini Arianti, David Tandio, Sarah E. Utzon, Zafir Kaiser, Yachen Shen, Ditte Neess, Hannes Embring, Dilip Menon, Olivia J. Conway, Frederike Sass, Fabian Finger, Lidia Argemi-Muntadas, Tao Ma, Elahu G. Sustarsic, Cecilie Kynding Kristensen, Rebecca L. McIntyre, Genesee J. Martinez, Anna Sofie Husted, Matthew J. Emmett, Zachary A. Kipp, Mikkel Frost, Mark P. Jedrychowski, Michel van Weeghel, Homa Majd, Ekaterina Zhuravleva, Robert W. McGarrah, Kaja Plucińska, Mohit K. Midha, Andreas Prokesch, Paul Cohen, James G. Granneman, Patrick Seale, Riekelt H. Houtkooper, Jacob B. Hansen, Steven P. Gygi, Thue W. Schwartz, Matthew P. Gillum, Terry D. Hinds, Raymond E. Soccio, Phillip J. White, Edmund R. S. Kunji, Thomas Moritz, Jonas T. Treebak, Endre Kristóf, Susanne Mandrup, Brice Emanuelli, Nathaniel W. Snyder, Daniel J. Fazakerley, Lawrence Kazak, Nils J. Færgeman, Mitchell A. Lazar, Zachary Gerhart-Hines
Show PDF Cite

Adipocyte lipid metabolism is coordinated by circadian rhythms, diet, and environmental temperature, but how these diverse signals are molecularly integrated remains unknown. We showed that these cues converge on the orphan mitochondrial transporter SLC25A34 to orchestrate lipid cycling. During the sleep phase, the adipocyte clock suppresses Slc25a34 expression through the REV-ERB transcriptional repressors. Entering the active phase, consuming lipid-rich diets, or exposure to cold abolishes REV-ERB repression, and lipolytic signals stimulate Slc25a34 transcription through the peroxisome proliferator–activated receptors. SLC25A34 is proposed to import oxaloacetate into mitochondria, dually supporting the tricarboxylic acid cycle and cytosolic acetyl–coenzyme A (acetyl-CoA) production. Elevated cytosolic acetyl-CoA then fuels the synthesis of lipids and promotes the transcription of genes enhancing mitochondrial oxidation. Thus, SLC25A34 confers circadian, dietary, and temperature control of adipocyte lipid metabolism.

More from our Archive