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- Title
Age-related changes in circadian regulation of the human plasma lipidome.
- Authors
Rahman, Shadab A.; Gathungu, Rose M.; Marur, Vasant R.; St. Hilaire, Melissa A.; Scheuermaier, Karine; Belenky, Marina; Struble, Jackson S.; Czeisler, Charles A.; Lockley, Steven W.; Klerman, Elizabeth B.; Duffy, Jeanne F.; Kristal, Bruce S.
- Abstract
Aging alters the amplitude and phase of centrally regulated circadian rhythms. Here we evaluate whether peripheral circadian rhythmicity in the plasma lipidome is altered by aging through retrospective lipidomics analysis on plasma samples collected in 24 healthy individuals (9 females; mean ± SD age: 40.9 ± 18.2 years) including 12 younger (4 females, 23.5 ± 3.9 years) and 12 middle-aged older, (5 females, 58.3 ± 4.2 years) individuals every 3 h throughout a 27-h constant routine (CR) protocol, which allows separating evoked changes from endogenously generated oscillations in physiology. Cosinor regression shows circadian rhythmicity in 25% of lipids in both groups. On average, the older group has a ~14% lower amplitude and a ~2.1 h earlier acrophase of the lipid circadian rhythms (both, p ≤ 0.001). Additionally, more rhythmic circadian lipids have a significant linear component in addition to the sinusoidal across the 27-h CR in the older group (44/56) compared to the younger group (18/58, p < 0.0001). Results from individual-level data are consistent with group-average results. Results indicate that prevalence of endogenous circadian rhythms of the human plasma lipidome is preserved with healthy aging into middle-age, but significant changes in rhythmicity include a reduction in amplitude, earlier acrophase, and an altered temporal relationship between central and lipid rhythms. Intrinsic circadian rhythm in the human plasma lipidome is preserved during healthy aging, but there is a significant advance in the phase and a reduction in the amplitude of circadian lipid profiles in older compared to younger adults.
- Subjects
BIOLOGICAL rhythms; CIRCADIAN rhythms; PHYSIOLOGY
- Publication
Communications Biology, 2023, Vol 6, Issue 1, p1
- ISSN
2399-3642
- Publication type
Article
- DOI
10.1038/s42003-023-05102-8