Greco, Carolina M.Welz, Patrick-SimonKumar, ArunVaca-Dempere, MireiaDeryagian, OlegMuñoz Cánoves, Pura, 1962-Sassone-Corsi, Paolo2021-11-152021-11-152021Greco CM, Koronowski KB, Smith JG, Shi J, Kunderfranco P, Carriero R et al. Integration of feeding behavior by the liver circadian clock reveals network dependency of metabolic rhythms. Sci Adv. 2021;7(39):eabi7828. DOI: 10.1126/sciadv.abi78282375-2548http://hdl.handle.net/10230/48973The mammalian circadian clock, expressed throughout the brain and body, controls daily metabolic homeostasis. Clock function in peripheral tissues is required, but not sufficient, for this task. Because of the lack of specialized animal models, it is unclear how tissue clocks interact with extrinsic signals to drive molecular oscillations. Here, we isolated the interaction between feeding and the liver clock by reconstituting Bmal1 exclusively in hepatocytes (Liver-RE), in otherwise clock-less mice, and controlling timing of food intake. We found that the cooperative action of BMAL1 and the transcription factor CEBPB regulates daily liver metabolic transcriptional programs. Functionally, the liver clock and feeding rhythm are sufficient to drive temporal carbohydrate homeostasis. By contrast, liver rhythms tied to redox and lipid metabolism required communication with the skeletal muscle clock, demonstrating peripheral clock cross-talk. Our results highlight how the inner workings of the clock system rely on communicating signals to maintain daily metabolism.application/pdfengCopyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S.Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).info:eu-repo/semantics/articlehttp://dx.doi.org/10.1126/sciadv.abi7828info:eu-repo/semantics/openAccess