Urinary output of endogenous monoamine oxidase inhibitory activity is related to everyday stress.
The MAO A and B inhibitory components of urinary tribulin were investigated in normal individuals (11 males and 24 females, mean age +/- SD; 27.1 +/- 4.5 years) in relation to everyday stress. Volunteers collected a urine sample at the same time (late evening) on five days over a single week. On each occasion subjects also completed a mood adjective checklist which measured perceived stress levels over the day in question. For each subject all daily measures were aggregated. Mean individual urinary MAO A and B inhibitory activity was found to be positively correlated with stress scores both before (r = 0.38, p < 0.05 and r = 0.37, p < 0.05 respectively, n = 35) and after (r = 0.35, p < 0.05 and r = 0.33, p < 0.05 respectively, n = 35) correction for the effects of urinary volume. These results suggest that in normal healthy individuals high endogenous MAO inhibitory activity in the urine is indicative of a relatively enduring state of everyday stress.
Doyle
A
A
Psychophysiology and Stress Research Group, School of Biological and Health Sciences, University of Westminster, London, United Kingdom.
Hucklebridge
F
F
Evans
P
P
Clow
A
A
D000328:Adult; D005260:Female; D006801:Humans; D007510:Isatin; D008297:Male; D008996:Monoamine Oxidase Inhibitors / Q000652:urine*; D013315:Stress, Psychological / Q000652:urine*
D008996:Monoamine Oxidase Inhibitors; D007510:Isatin; C039776:tribulin