Circulating human hepcidin-25 concentrations display a diurnal rhythm
, increase with prolonged fasting, and are reduced by growth hormone administration.
Nearly all physiological and behavioral functions in humans occur on a rhythmic basis, which in turn leads to dramatic diurnal rhythms
in human performance capabilities.
Glycemia and insulinemia have a distinct diurnal rhythm
unrelated to blood glucose concentration and insulin secretion.
This difference is not a simple consequence of environmental conditions that the animals experience during their periods of activity, because the same pattern is seen when animals are confined to thermal gradients in the laboratory, where the usual diurnal rhythm
in thermal conditions is eliminated (Huey et al.
Estimates of period length close to 24 h were considered evidence of a diurnal rhythm
, provided that all model parameters were estimated with high statistical significance (P < 0.
The diurnal rhythm
in RA is characterised by elevated night time levels of inflammatory cytokines such as IL6, which leads to extreme stiffness and pain in the hours immediately after awaking.
The rate at which bone resorption (loss) occurs follows a diurnal rhythm
, with the greatest bone loss occurring at night.
Circulating proprotein convertase subtilisin kexin type 9 has a diurnal rhythm
synchronous with cholesterol synthesis and is reduced by fasting in humans.
Individuals working night shifts have displaced or reduced diurnal rhythms
, a phenomenon that should also be acknowledged (or such individuals excluded) when establishing reference intervals.
The Research is expected to yield valuable information on the effects of dosing relative to food intake, as well as the influences of rest, posture and diurnal rhythms
on colonic residence time.
When the diurnal rhythms
of performance tasks are considered, those of "simple" tasks, with a small cognitive component, tend to parallel the rhythm of core temperature and peak in the late afternoon and evening.
The clock genes period 1 and period 2 mediate diurnal rhythms
in dioxin-induced CyplAl expression in the mouse mammary gland and liver.
The offering of food marks the diurnal rhythms
of daily meals as well as the annual cycles of festivals and significant dates in the Jewish calendar.