In the present experiments, cortisol concentrations were elevated in jet-lagged hamsters throughout the course of the treatment, with recovery seen near the conclusion of the phase shifting (Figure 4A).
In this experiment plasma cortisol samples below limit of detection were removed in order not to violate the statistical analysis.
Also in this experiment, plasma cortisol levels were analysed in samples from the fish used for Ussing chamber experiments, but only in the the two extreme groups at day 36-38 but no differences could be revealed.
For experiments where cortisol alone was measured, cells were plated at a density of 0.5 1.0×106 cells/35 mm dish.
For experiments where cortisol was measured and RNA was isolated from cell lysates, cells were plated at a density of 5 7×106 cells/60 mm culture dish.
In some cases, people who go through this diabolical experiment see their cortisol levels rise by 400percentt.
In Experiment I, salivary cortisol concentrations were additionally measured immediately before, during and after recognition testing to control for possible influences of circadian and awakening-related variations in glucocorticoid release known to influence memory function [34], [64].
Significant interactions, when present (i.e. plasma cortisol Experiment 2), was further analysed by Bonferroni corrected pair-wise comparisons.
In addition, a gene array experiment demonstrated that cortisol modulates the expression of genes involved in DNA damage signaling, including the proto-oncogene Cdc25A (involved in cell cycle delay following DNA damage) and the genes coding for the DNA damage sensors Chk1, Rad53 and Rad9 [ 110].
On the other hand, as Martha Farah of the University of Pennsylvania has found, students who do not feel emotionally safe tend not to develop good memories (which is consistent with cortisol experiments in animals).
