Project description:Time-restricted eating is emerging as a promising dietary intervention that prevents cardiometabolic disease; however, the molecular mechanisms remain largely unknown. It is generally thought that time-restricted feeding-as it is known in animal studies-reprograms circadian rhythms in peripheral organs including skeletal muscle. Recent studies reported that peripheral organs entrain to time-restricted feeding in a highly diverse tissue-specific manner, which is indicated by the kinetics of the circadian clock in peripheral organs, transcriptome and metabolome. A discrepancy is found in the circadian coherence between rhythmic transcripts and rhythmic metabolites, suggesting the presence of additional regulation at the proteome level. To explore the landscape of rhythmic proteins in skeletal muscle from time-restricted fed mice, we sampled 50 mouse tibialis anterior muscle tissues from 11-week-old C57BL/6J female mice. These mice had been fed day time-restricted feeding for 3 weeks, during which food was accessible between Zeitgeber time (ZT) 0 h and ZT 12 h. Samples were dissected and snap-frozen in liquid nitrogen every two hours starting from ZT0 of the first day to ZT0 of the third day. This sampling scheme covers two complete day/night cycles and has two biological replicates per time point for a total of 25 time points. Next, we performed mass spectrometry-based parallel accumulation–serial fragmentation combined with data-independent acquisition (diaPASEF) quantitative proteomics to analyze these mouse skeletal muscle tissues. Together, we have generated a dataset that provide insights into circadian rhythms of skeletal muscle under the regulation of time-restricted feeding in mice.
Project description:Temporally restricted feeding is known to impact the circadian clock. This dataset shows the effects of temporally restricted feeding on the hepatic transcriptome.
Project description:Temporally restricted feeding is known to impact the circadian clock. This dataset shows the effects of temporally restricted feeding on the hepatic transcriptome. C57/B6 mice were entrained for two weeks to a temporally restricted feeding schedule. Food was made available only between ZT(CT)1 and ZT(CT)9. Mice were then released into constant darkness while food availability was still restricted and liver tissue was collected at the indicated timepoints on the second day in constant darkness. Total RNA was extracted and 5ug were submitted to the standard Affymetrix protocol for amplification, labeling and hybridization.
Project description:In obesity, misalignment of feeding time with the light/dark environment results in disruption of peripheral circadian clocks. Conversely, restricting feeding to the active period mitigates metabolic syndrome through mechanisms that remain unknown. Here we show that adipocyte thermogenesis is essential for the healthful metabolic response to time restricted feeding. Genetic enhancement of adipocyte thermogenesis through ablation of Zfp423 attenuates obesity caused by circadian mistimed high fat diet feeding through a mechanism involving creatine metabolism. Circadian control of adipocyte creatine metabolism underlies timing of diet-induced thermogenesis, and enhancement of adipocyte circadian rhythms through overexpression of the clock activator Bmal1 ameliorates metabolic complications during diet induced obesity. These findings establish creatine mediated diet-induced thermogenesis as a bioenergetic mechanism driving metabolic benefits during time-restricted feeding.
Project description:Next generation sequencing was used to assess the changes along a diurnal cycle in the transcriptome of Drosophila head, periphery (entire body except the head) or the heart at 3, 5 or 7 weeks of age under ad libitum feeding (ALF) or time-restricted feeding (TRF). Next generation sequencing was used to assess the changes along a diurnal cycle in the transcriptome of Drosophila head, periphery (entire body except the head) or the heart at 3, 5 or 7 weeks of age under ad libitum feeding (ALF) or time-restricted feeding (TRF).
Project description:Meal timing is essential in synchronization of circadian rhythms in different organ systems through clock-dependent and -independent mechanisms. Adipose tissue is a critical metabolic and endocrine organ whose circadian clock and transcriptome can be reset by meal timing. However, it remains largely unexplored how circadian rhythms in adipose tissue are organized in time-restricted feeding that intervenes meal timing. Here, we applied quantitative phospho-proteomics to characterize circadian features associated with ad libitum feeding (ALF), day/inactive phase-restricted feeding (DRF) and night/active phase-restricted feeding (NRF) in female mice.
Project description:Time-restricted feeding prevents deleterious metabolic effects of circadian disruption through epigenetic control of β-cell function
Project description:Time-restricted feeding improves metabolic health independently of dietary macronutrient composition or energy restriction. To understand the mechanisms underpinning the effects of time-restricted feeding, we investigated the metabolic and transcriptomic profile of skeletal muscle and serum samples from 11 overweight/obese men. In muscle, 4-10% of transcripts and 14% of metabolites were periodic, with the amplitude of the metabolites lower after time-restricted feeding. Core clock genes were unaltered by either intervention, while time-restricted feeding induced rhythmicity of genes related to lipid and amino acid transport. In serum, 49-65% of the metabolites had diurnal rhythms across both conditions, with the majority being lipids. Time-restricted feeding shifted the skeletal muscle metabolite profile from predominantly lipids to amino acids. Our results show time-restricted feeding differentially affects the amplitudes and rhythmicity of serum and skeletal muscle metabolites, and regulates the rhythmicity of genes controlling lipid and amino acid transport, without perturbing the core clock.