Author:
Smith Jacob G.,Koronowski Kevin B.,Sato Tomoki,Greco Carolina,Petrus Paul,Verlande Amandine,Chen Siwei,Samad Muntaha,Deyneka Ekaterina,Mathur Lavina,Blazev Ronnie,Molendijk Jeffrey,Mortimer Thomas,Kumar Arun,Deryagin Oleg,Vaca-Dempere Mireia,Liu Peng,Orlando Valerio,Parker Benjamin L.,Baldi Pierre,Welz Patrick-Simon,Jang Cholsoon,Masri Selma,Benitah Salvador Aznar,Muñoz-Cánoves Pura,Sassone-Corsi Paolo
Abstract
AbstractExpressed throughout the body, the circadian clock system achieves daily metabolic homeostasis at every level of physiology, with clock disruption associated with metabolic disease (1, 2). Molecular clocks present in the brain, liver, adipose, pancreas and skeletal muscle each contribute to glucose homeostasis (3). However, it is unclear; 1) which organ clocks provide the most essential contributions, and 2) if these contributions depend on inter-organ communication. We recently showed that the liver clock alone is insufficient for most aspects of daily liver glucose handling and requires connections with other clocks (4). Considering the pathways that link glucose metabolism between liver and skeletal muscle, we sought to test whether a clock connection along this axis is important. Using our previous published methodology for tissue-specific rescue of Bmal1 in vivo (4, 5), we now show that in the absence of feeding-fasting cycles, liver and muscle clocks are not sufficient for systemic glucose metabolism, nor do they form a functional connection influencing local glucose handling or daily transcriptional rhythms in each tissue. However, the introduction of a daily feeding-fasting rhythm enables a synergistic state between liver and muscle clocks that leads to restoration of systemic glucose tolerance. These findings reveal limited autonomous capabilities of liver and muscle clocks and highlight the need for inter-organ clock communication for glucose homeostasis which involves at least two peripheral metabolic organs.
Publisher
Cold Spring Harbor Laboratory
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献