We examined associations between three easily interpretable markers of circadian rhythm activity (amplitude, acrophase and rhythmicity index) and demography and clinical characteristics.
More definitive studies (Hida et al. 2012) are, therefore, required to fully characterize physiological markers of circadian rhythms.
As mentioned above, peroxiredoxins are conserved markers of circadian rhythms (Fig. 5A) (24), and there is diurnal variation in GSH and cysteine redox states (9).
Both are biological markers of the circadian rhythm.
Circadian rhythms: Sleep-wake activity patterns over a week are studied with actigraphy as a marker of circadian rhythms.
The profiles of serum cortisol were documented, since this hormone is considered as a strong marker of circadian rhythms.
Recently, 2-Cys-Prx has been shown to be a conserved marker of circadian rhythms in all the three phylogenetic domains viz.
Photic information relayed from the SCN to the pineal gland is closely reflected there in the secretion of melatonin, which is probably the strongest biological marker of the circadian rhythm in humans [4].
In healthy humans, plasma PCSK9 levels are decreased with fasting and increased postprandially, and display a diurnal rhythm that mirror markers of hepatic cholesterol synthesis [ 25, 26].
The aim of the paper was to review the data on the effects of electric, magnetic, and electromagnetic fields on melatonin and cortisol rhythms, two major markers of the circadian system as well as on sleep.
