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Modulation of circadian clocks by nutrients and food factors

Pages 863-870 | Received 29 Oct 2016, Accepted 06 Jan 2017, Published online: 24 Jan 2017

Figures & data

Fig. 1. Circadian phase shift by stimuli in cultured mouse explants.

Notes: Cultured tissue explants from Per2::Luciferase knock-in miceCitation18) were monitored using bioluminescence. Adding 10 nM insulin to culture medium altered circadian phase in white adipose (A), but not in lung (B) tissue. Decreasing temperature from 37 to 34 °C for six hours delayed circadian phase (C), whereas 10 nM dexamethasone (glucocorticoid analog) advanced phase in lung (D). Arrows, timing of stimuli; arrowheads, peak timing.
Fig. 1. Circadian phase shift by stimuli in cultured mouse explants.

Table 1. Nutrients and food factors that modulate circadian clocks.

Fig. 2. Resveratrol shifts circadian phase of cultured fibroblasts.

Notes: Rat-1 fibroblasts were transfected with Bmal1-luciferase reporter gene and then bioluminescence was monitored. Adding 100 μM resveratrol delayed circadian phase compared with vehicle (DMSO). Immediately decreased luminescence probably due to luciferase inhibition.Citation90) Arrow, timing of stimuli; arrowheads, peak timing.
Fig. 2. Resveratrol shifts circadian phase of cultured fibroblasts.

Fig. 3. Caffeine lengthens circadian period of human U2OS cells.

Notes: Bioluminescence emitted by U2OS cells derived from human osteosarcoma stably expressing hPER2::Luciferase reporter geneCitation38) incubated with indicated concentrations of caffeine (A) was monitored for several days. Caffeine dose dependently lengthened circadian period (B).
Fig. 3. Caffeine lengthens circadian period of human U2OS cells.

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